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BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rotary switch device, particularly to a rotary switch device in which fixed contacts are fixed to one of opposite face side of a base member made of a synthetic resin, a contact plate in a ring shape is
floatingly held by a rotor disposed opposed to the one face side of the base member, movable contacts capable of switching the connection and disconnection to and from the fixed contacts in accordance with the rotation of the rotor are integrally formed
at a plurality of places spaced from each other at circumferential intervals on the contact plate, and sliding faces capable of being brought into slide contact with the movable contacts are formed along a plane perpendicular to the rotation axis of the
rotor on one of opposite faces of the base member on the rotor side.
2. Description of Related Art
Conventionally, there has already been known such a rotary switch by Japanese Utility Model Publication No. 1-29959 and the like, and in such a device, sliding faces are formed in a base member in such a manner that portions of movable contacts
to be brought into slide contact with fixed contacts can also be brought into slide contact with the sliding faces. Therefore, foreign objects produced by wear of the sliding faces resulting from slide contact of the movable contacts with the sliding
faces are brought onto the fixed contacts by the rotation of the rotor and there is a possibility that the reliability of electrical connection may deteriorate by the foreign objects being caught between the movable contacts and the fixed contacts while
the switch is ON.
SUMMARY OF THE INVENTION
The present invention has been made in view of such a situation and it is an object thereof to provide a rotary switch device with improved electrical connection reliability by preventing foreign matters from being caught between movable contacts
and fixed contacts while the switch is ON.
According to a first feature of the invention, a rotary switch device is provided in which fixed contacts are fixed on one of opposite face sides of a base member made of a synthetic resin, a contact plate in a ring shape is floatingly held by a
rotor disposed opposed to the one face side of the base member, movable contacts capable of switching the connection and disconnection to and from the fixed contacts in accordance with the rotation of the rotor are integrally formed at a plurality of
places spaced from each other at circumferential intervals on the contact plate, and sliding faces capable of being brought into slide contact with the movable contacts are formed on one of opposite faces of the base member closer to the rotor along a
plane orthogonal to a rotation axis of the
rotor, wherein the sliding faces are formed on the base member so as to avoid loci which are drawn by portions of the movable contacts to be brought into slide contact with the fixed contacts in accordance with the rotation of the rotor.
With the arrangement of the first feature, the portions of the movable contacts to be brought into slide contact with the fixed contacts are not brought into slide contact with the sliding faces, even when the sliding faces are worn and foreign
matters are produced in accordance with the slide contact of the movable contacts with the sliding faces, the foreign matters are prevented from being brought onto the fixed contacts by the rotation of the rotor and the electrical connection reliability
can be improved.
According to a second feature of the invention, in addition to the arrangement of the above first feature, a rotary switch device is provided in which springs for exerting spring forces to bias the movable contacts toward the base member are
provided between the contact plates and the rotor, a case made of a synthetic resin being in contact with the one face side of the base member to support the rotor rotatably between the case and the base member is integrally provided with a plurality of
leg portions respectively inserted into a plurality of engaging holes provided in the base member, engaging claws engaged with the other of the opposite faces of the base member are outward projected from tip ends of the leg portions, and a cover made of
a synthetic resin covering at least bonding portions of lead wires connected to the respective fixed contacts on the other face side of the base member is integrally provided with a plurality of come-off preventive portions fitted to the respective
engaging holes so as to be interposed between the base member and the respective leg portions.
With the arrangement of the second feature, since the engaging claws directed outwardly for engaging with the base member are provided at the leg portions integrally provided on the case, the die for forming the case need not be provided with a
sliding die which has conventionally been necessary, and simplification of the die structure can be achieved. Further, since the plurality of come-off preventive portions fitted to the engaging holes and interposed between the leg portions inserted into
the respective engaging holes and the base member are provided integrally with the cover, even when the numbers of engaging holes, leg portions and engaging claws are made comparatively small, there can be excluded a possibility of releasing engagement
between the engaging claws and the base member even with stress relaxation at high temperature, the work of assembling the case to the base member is facilitated and the assembling workability can be enhanced. Further, since the cover covers at least
the connecting portions of the lead wires bonded to the fixed contacts, the insulation reliability at the connecting portions can be improved.
According to a third feature of the invention, in addition to the arrangement of the first feature, a rotary switch device is provided in which a plurality of bus bars integrally having the fixed contacts and embedded in the base member are
integrally provided with terminal portions arranged parallel to each other so as to face the other of opposite faces of the base member in such a way that conductors of lead wires can directly be bonded to the terminal portions, and a cover made of a
synthetic resin for covering at least portions of connecting the lead wires to the respective terminal portions on the side of the other face of the base member is integrally provided with partitioning walls for partitioning areas where the terminal
portions and the conductors are bonded, respectively.
With the arrangement of the third feature, since the plurality of bus bars embedded in the base member are respectively and integrally provided with the fixed contacts and the terminal portions, the conductors of the lead wires are respectively
and directly bonded to the plurality of terminal portions arranged in parallel on the other face side of the base member, the workability can be enhanced in bonding the lead wires to the respective fixed contacts. Further, since not only the cover
covering the other face side of the base member covers the bonding portions where the terminal portions and the respective lead wires are bonded but the partition walls integrally provided to the cover partition the areas where the terminal portions and
the lead wires are joined, shortcircuit can be prevented from occurring between the bonding portions, and the insulation reliability can be improved.
According to a fourth feature of the invention, in addition to the arrangement of the first feature, the rotary switch device is provided in which a plurality of bus bars integrally provided with the fixed contacts and embedded in the base member
are integrally provided with terminal portions having bonding faces facing the other of opposite faces of the base member and arranged parallel to each other in such a way that conductors of lead wires corresponding to the respective terminal portions
can directly be bonded to the bonding faces, and the base member is integrally provided with a holding portion for holding the lead wires in a direction forming an angle to the bonding faces in a plane orthogonal to a direction of arrangement of the
terminal portions.
With the arrangement of the fourth feature, the plurality of bus bars embedded in the base member are integrally provided with the fixed contacts and the terminal portions, and the conductors of the lead wires are directly bonded to the bonding
faces of the plurality of terminal portions arranged in parallel on the other face side of the base member. Accordingly, the workability can be enhanced in bonding the lead wires to the respective fixed contacts. Further, by the holding portion
provided to the base member, the wires are held in the direction forming an angle to the bonding faces in a plane orthogonal to the direction of arrangement of the terminal portions, the tensile load on the lead wires outside the rotary switch device is
prevented from directly acting on the bonding portions where the lead wires are bonded to the respective terminal portions, and the lead wires are not repeatedly bent between the holding portion and the terminal portions. Therefore, strict strength
guarantee required at the bonding portions where the conductors of the respective lead wires are bonded to the bonding faces is not necessary. Further, in a state in which the lead wires are held by the holding portion, the conductors of the lead wires
can directly be bonded to the bonding faces of the respective terminal portions and accordingly, positioning of the lead wires in the bonding is facilitated and connection workability can further be enhanced.
According to a fifth feature of the invention, in addition to the fourth feature, bonding portions of the lead wires bonded to the respective terminal portions on the other face of the base member are covered with a cover made of synthetic resin,
the holding portion has a plurality of fitting grooves each comprising a first groove portion opened to the cover and a second groove portion opened to the outer side of the base member and connected to the first groove portion in a generally L-shape in
such a way that the respective lead wires can be resiliently fitted therein, and the cover is integrally provided with a restraining wall for restraining the respective lead wires between the cover and at least the second groove portion of the fitting
grooves. With the fifth feature, the lead wires can firmly be restrained around the portions of the lead wires bonded to the terminal portions, and the bonding of the conductors of the lead wires to the bonding faces can be maintained further firmly.
According to a sixth feature of the invention, in addition to the first feature, a plurality of bus bars integrally provided with the fixed contacts and embedded in the base member are integrally provided with terminal portions, each of the
terminal portions has a cross section formed in a generally U-shape so that conductors of lead wires are fitted to the terminal portions, and the conductors fitted to the terminal portions are bonded to the respective terminal portions by
thermocompression bonding using planar electrodes for clamping the conductors between the electrodes and the respective terminal portions.
According to the arrangement of the sixth feature, the terminal portions integrally provided to the plurality of bus bars are formed of a generally U-shape cross-section to fit the conductors of the lead wires and accordingly, part of the
conductors can simply be prevented from protruding from the terminal portions, and the conductors can be clamped easily between the terminal portions and the electrodes, and the bonding workability can be enhanced. Further, the electrodes are formed in
a simple planar shape and accordingly, the maintenance thereof is facilitated.
According to a seventh feature of the invention, in addition to the arrangement of the first feature, a plurality of bus bars integrally provided with the fixed contacts are embedded in the base member and the other face of the base member is
provided with a plurality of opening portions for exposing the respective bus bars to an outside. With the arrangement of the seventh feature, the bus bars embedded in the base member are positively exposed to the outside on the other face side of the
base member, an increase in the allowable current can be achieved by improving the heat radiating ability of the bus bars, the amount of synthetic resin necessary for molding the base member can be reduced by providing the plurality of opening portions
in the base member, the bus bars can be supported by the respective opening portions in molding the base member and accordingly, the positions of the bus bars relative to the base member can be determined more accurately.
According to an eighth feature of the invention, in addition to the arrangement of the first feature, the bus bars which are integrally provided with flat plate portions along a plane orthogonal to a rotation axis of the rotor and side plate
portions orthogonally connected to the flat plate portions are embedded in the base member, and the flat plate portions of the bus bars are integrally provided with the fixed contacts.
With the arrangement of the eighth feature, the bus bars embedded in the base member are integrally provided with the flat plate portions and the side plate portions orthogonally connected to the flat plate portions and accordingly, the surface
areas of the bus bars can be increased while comparatively decreasing the areas occupied by the bus bars in a plane orthogonal to the rotation axis of the rotor and accordingly, heat radiating ability can be enhanced while comparatively decreasing the
areas where the bus bars are provided.
According to a ninth feature of the invention, in addition to the arrangement of the first feature, a plurality of bus bars are connected to each other via connecting portions which are cut in accordance with the formation of through holes by
punching after molding the base member, the bus bars being integrally provided with the fixed contacts and embedded in the base member, a cover for covering the base member from a side opposite to the rotor is provided with a plurality of heat radiating
openings, and bosses for closing the through holes are integrally formed with the cover so as to project to the base member side.
With the arrangement of the ninth feature, the cover is provided with the plurality of heat radiating openings and accordingly, the ability to radiate heat from the cover is enhanced, heat is prevented from being accumulated in the region between
the cover and base member and an increase in the allowable current of the bus bars can be achieved. Further, the bosses for closing the through holes are integrally provided with the cover and accordingly, despite the provision of the heat dissipating
openings in the cover, foreign objects can be prevented from entering the space between the base member and the rotor through the through holes.
The above-described and other objects, features, and advantages of the invention will become apparent from description of a preferred embodiment described in details in reference to the attached drawings as follows.
BRIEF DESCRIPTION OF
THE DRAWINGS
FIGS. 1 to 20 show an embodiment when the invention is applied to an ignition switch for a vehicle, wherein:
FIG. 1 is a longitudinal sectional view of an ignition switch taken along a line 1--1 of FIG. 2;
FIG. 2 is a view when viewed in the direction of arrow 2 of FIG. 1;
FIG. 3 is a sectional view taken along a line 3--3 of FIG. 2;
FIG. 4 is a front view of the ignition switch when viewed in the direction of arrow 4--4 of FIG. 1;
FIG. 5 is an exploded side view of the ignition switch when viewed in the direction of arrow 5 of FIGS. 2 and 4;
FIG. 6 is a view of a first contact plate when viewed in the direction of arrow A of FIG. 5;
FIG. 7 is a view of a second contact plate when viewed in the direction of arrow A of FIG. 5;
FIG. 8 is a front view of a base member when viewed in the direction of arrow 8 of FIG. 5;
FIG. 9 is a rear view of the base member when viewed in the direction of arrow 9 of FIG. 5;
FIG. 10 is a sectional view taken along a line 10--10 of FIG. 8;
FIG. 11 is an enlarged sectional view taken along a line 11--11 of FIG. 8;
FIG. 12 is an enlarged sectional view taken along a line 12--12 of FIG. 4;
FIG. 13 is an enlarged sectional view taken along a line 13--13 of FIG. 4;
FIG. 14 is a front view of bus bars embedded in the base member in the same direction in which the base member of FIG. 8 is viewed;
FIG. 15 is a perspective view of the bus bars embedded in the base member;
FIG. 16 is a sectional view taken along a line 16--16 of FIG. 4;
FIG. 17 is a sectional view developed in a peripheral direction showing the relative positions of a first through a third fixed contact and a first through a third movable contact at a LOCK position;
FIG. 18 is a sectional view developed in a peripheral direction showing the relative positions of a fourth through a sixth fixed contact and a fourth through a sixth movable contact at a LOCK position;
FIG. 19 is an enlarged sectional view taken along a line 19--19 of FIG. 4; and
FIGS. 20A-20C are sectional views successively showing the procedure of bonding a lead wire to a terminal portion.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Describing an embodiment of the invention in reference to FIGS. 1 to 20, firstly, in FIG. 1, a casing 22 of a cylinder lock apparatus 21 for controlling the start and stop of an engine and electric equipment of a vehicle, is attached to a
steering column, not illustrated, a rotary member 23 for rotating a key, not illustrated, in accordance with the operation of the key to a position out of a LOCK position, an ACC position, an ON position and a START position, is disposed within a front
end portion of the casing 22, and an ignition switch 24 as a rotary switch device for switching incident to the rotation of the rotary member 23 is connected to the rotary member 23 and attached to the front end portion of the casing 22.
In reference to FIGS. 2 to 5, the ignition switch 24 is provided with a case 25 made of a synthetic resin, a movable contact assembly 26, a fixed contact assembly 27 and a cover 28 made of a synthetic resin. The movable contact assembly 26 is
rotatably supported between the case 25 and the fixed contact assembly 27 which are engaged and connected with each other. The cover 28 covering the fixed contact assembly 27 from the opposite side to the case 25, the fixed contact assembly 27, and the
case 25 are fastened to the casing 22.
The case 25 is integrally provided with a case main portion 25a formed in a bowl-like shape and a flange portion 25b projecting from an opening end of the case main portion 25a to the outside, the case main portion 25a is fitted to an attaching
recess portion 29 provided in the front end portion of the casing 22 such that the opening end of the case main portion 25a is directed to the opposite side to the casing 22 and the flange portion 25b is in contact with the front end face of the casing
22.
A circular through hole 30 is made at a central portion of a closed end of the case main portion 25a, a first cylindrical support portion 31
coaxially connected with the through hole 30 and a second cylindrical support portion 32 coaxially surrounding the first support portion 31 are projected from the inner face of the closed end of the case main body 25a, and front ends of the both
support portions 31 and 32 are located at the same position along the axis of the through hole 30. Further, the flange portion 25b is provided with a pair of insertion holes 33, . . . arranged on a diameter of the through hole 30.
The movable contact assembly 26 is comprised of a first and a second contact plate 35 and 36 made of conductive metal floatingly supported by a rotor 34 made of a synthetic resin. The rotor 34 is integrally provided with a connecting cylinder
portion 37 fitted to the first support portion 31 of the case 25 and the rotary member 23 inserted into the through hole 30 of the case 25 is connected to the connecting cylinder portion 37 such that the both cannot be moved angularly relative to each
other. That is, the rotor 34 is rotated in accordance with the rotation of the rotary member 23.
Support holes 38, . . . each extended in a radial direction of the rotor 34 and having an open outer end are made at two locations of an outer peripheral portion of the rotor 34 spaced from each other at an interval in the peripheral direction,
spherical bodies 39 are inserted into outer end portions of the respective support holes 38, . . . and springs 40 for biasing the spherical bodies 39, . . . toward the inner face side of the case main portion 25a are provided between closed portions of
inner ends of the support holes 38, . . . and the spherical members 39 . . . Meanwhile, a plurality of recess portions (not illustrated) for fitting part of the spherical members 39, . . . are provided on the inner face of the case main portion 25a.
Thereby, the rotor 34 is rotated in steps to one of the positions of the LOCK position, the ACC position, the ON position and the START position in accordance with the rotation of the rotary member 23.
A torsion spring 47 is inserted between the first and the second support portions 31 and 32 of the case main portion 25a and both ends of the torsion spring 47 are respectively engaged with the rotor 34 and the case main portion 25a. By the
spring force of the torsion spring 47, the rotor 34 is rotatingly biased to return from the START position to the ON position.
In FIG. 6, the first contact plate 35 is formed in a ring shape on a plane orthogonal to the rotation axis of the rotor 34 and a first through a third movable contact 41, 42 and 43 raised to the fixed contact assembly 27 side are integrally
formed at three locations spaced from each other in the peripheral direction of the first contact plate 35 (hatched portions of FIG. 6) at the same distance from the rotation center of the rotor 34. Further, the first contact plate 35 is supported by
the rotor 34 such that the position thereof in the peripheral direction relative to the rotor 34 is restricted and the movement thereof relative thereto in the axial direction is permitted in a restricted range, and springs 48, . . . for biasing the
first contact plate 35 to the fixed contact assembly 27 side are provided at three locations spaced from each other in the peripheral direction between the rotor 34 and the first contact plate 35. Thereby, the first contact plate 35, namely, the first
through third movable contacts 41 to 43 are floatedly supported by the rotor 34.
In FIG. 7, the second contact plate 36 is formed in a ring shape having a diameter smaller than that of the first contact plate 35 in a plane orthogonal to the rotation axis of the rotor 34 and fourth through sixth movable contacts 44, 45 and 46
raised to the fixed contact assembly 27 side are integrally formed at three locations of the second contact plate 36 spaced from each other in the peripheral direction (hatched portions in FIG. 7) at the same distance from the rotation center of the
rotor 34. Further, the second contact plate 36 is supported by the rotor 34 at a position nearer to the fixed contact assembly 27 than the first contact plate 35 such that position thereof in the peripheral direction relative to the rotor 34 is
restricted, and the movement thereof relative thereto is permitted in the axial direction in a restricted range, and springs 49, . . . for biasing the second contact plate 36 to the fixed contact assembly 27 side are provided at two locations spaced
from each other in the peripheral direction between the rotor 34 and the second contact plate 36. Thereby, the second contact plate 36, namely, the fourth through sixth movable contacts 44 to 46 are floatingly supported by the rotor 34.
Further, the rotor 34 is provided integrally with a cylindrical support shaft 50 coaxial with the connecting cylinder portion 37 in such a way as to project from the fourth through sixth movable contacts 44 to 46 toward the fixed contact assembly
27 side.
In reference to FIGS. 8 to 11, the fixed contact assembly 27 is comprised of a first through a fifth bus bar 51, 52, 53, 54 and 55 made of a conductive metal which are embedded in a base member 56 made of a synthetic resin.
The base member 56 is integrally provided with a base member main portion 56a of a hexagonal shape approximate to a quadrangular shape, a holding portion 56b disposed on the base member main portion 56a side at an interval, and a pair of
connecting portions 56c connecting the base member main portion 56a and the holding portion 56b to define a window 56d in a quadrangular shape between the base member main portion 56a an d the holding portion 56b. Thus the base member main portion 56a
is formed to have an outer shape substantially in correspondence with the shape of the front end of the casing 22 in the cylinder lock device 21, the outer edge portion of the base member main portion 56a can be brought into contact with the front end
portion of the casing 22 and the window 56d and the holding portion 56b are arranged to project toward side of the casing 22 in a state in which the outer edge portion of the base member main portion 56a is in contact with the front end portion of the
casing 22.
A face of the base member main portion 56a facing the movable contact assembly 26 side is provided with a fitting recess portion 57 formed so that the flange portion 25b of the case 25 is fitted thereto, a first contact providing face 58 extended
from the inner end of the fitting recess portion 57 inward along a plane orthogonal to the rotation axis of the rotary member 23, namely, the rotor 34, a first projection portion 59 in a cylindrical shape projected from the inner periphery of the first
contact providing face 58 toward the rotor 34, a cylindrical fitting projection portion 60 projected from the first contact providing face 58 toward the rotor 34 between the outer periphery of the first projection portion 59 and the inner periphery of
the fitting recess portion 57, a first recess portion 61 in a circular shape coaxially connected to the inner periphery of the first projection portion 59 with no step, a second contact providing face 62 in a ring shape extended from the inner end of the
first recess portion 61 inward along a plane orthogonal to the rotation axis of the rotor 34, a second projection portion 63 in a cylindrical shape projected from the inner periphery of the second contact providing face 62 toward the rotor 34 and a
second recess portion 64 in a circular shape coaxially connected to the inner periphery of the second projection portion 63 with no step.
The opening end of the case main portion 25a and the flange portion 25b are fitted to the fitting recess portion 57 in contact with the first contact providing face 58 outward from the fitting projection portion 57, and the fitting projection
portion 60 is projected toward the case 25 from the one face of the base member main portion 56a to be fitted to the opening end portion of the case main portion 25a.
Engaging holes 65.sub.1 and 65.sub.2 in a quadrangular shape are disposed at a plurality of locations, for example, two locations at an interval in the circumferential direction of an outer edge portion of the first contact providing face 58 in
the base member main portion 56a.
Meanwhile, as shown in FIG. 12, the flange portion 25b of the case 25 is integrally provided with a leg portion 66.sub.1 having an engaging claw 67.sub.1 engaged with other face side of the base member main portion 56a at its front end and
inserted into the engaging hole 65.sub.1, and as shown in FIG. 13, the flange portion 25b is integrally provided with a leg portion 66.sub.2 having an engaging claw 67.sub.2 for engaging with other face side of the base member main portion 56a at its
front end and inserted into the other engaging hole 65.sub.2. Further, the engaging claws 67.sub.1 and 67.sub.2 are projected outward from the front ends of the respective leg portions 66.sub.1 and 66.sub.2. Thus, by engaging the engaging claws
67.sub.1 and 67.sub.2 at the front ends of the leg portions 66.sub.1 and 66.sub.2 inserted into the respective engaging holes 65.sub.1 and 65.sub.2 with the other face side of the base member main portion 56a, the opening end of the case main portion 25a
and the flange portion 25b are brought into contact with the first contact providing face 58, by which the case 25 and the base member 56 are engaged and connected with each other. In the engaged and connected state, the rotor 34 of the movable contact
assembly 26 is rotatably supported between the base member main portion 56a and the case 25, a face of the rotor 34 is in slide contact with the front ends of the first and second support portions 31 and 32 of the case 25 and thrust supported thereby,
and the front end of the support shaft 50 provided to the other face side of the rotor 34 is in slide contact with a closed end of the second recess portion 64 of the base member main portion 56a and is thrust supported thereby.
In FIGS. 14 and 15, the first bus bar 51 is integrally provided with a flat plate portion 51a in a circular arc shape in flush with the first contact providing face 58 and a side plate portion 51b orthogonally connected to the inner periphery of
the flat plate portion 51a, which is embedded in the base member main portion 56a, the second bus bar 52 is provided with a flat plate portion 52a in flush with the first contact provided face 58 which is embedded in the base member main portion 56a, and
the third bus bar 53 is integrally provided with a first plate portion 53a in a circular arc shape in flush with the first contact providing face 58, a first side plate portion 53b orthogonally connected to the outer periphery of the flat plate portion
53a, a second plate portion 53c in flush with the second contact providing face 62, and a second side plate portion 53d orthogonally connected to the inner periphery of the first flat plate portion 53a and the outer periphery of the second flat plate
portion 53c, which is embedded in the base member main portion 56a.
A first fixed contact 71 is integrally provided with the flat plate portion 51a of the first bus bar 51 in such a way as to project toward the rotor 34, a second fixed contact 72 is provided integrally with the flat plate portion 52a of the
second bus bar 52 in such a way as to project toward the rotor 34, and a third fixed contact 73 is provided integrally with the first flat plate portion 53a of the third bus bar 53 in such a way as to project toward the rotor 34. Further, the flat plate
portions 51a and 52a, and the first flat plate portion 53a are provided and arranged around the first recess portion 61 in such a way as to have areas as wide as possible in the first contact providing face 58, and the first through third fixed contacts
71 to 73 are integrally provided with the flat plate portions 51a and 52a, and the first flat plate portion 53a in such a way that they are spaced from each other at intervals in the peripheral direction at the same distance from the rotation center of
the rotor 34 to perform connection/disconnection to/from the first through third movable contacts 41 through 43 of the rotor 34.
The fourth bus bar 54 is provided with a flat plate portion 54a in flush with the second contact providing face 62, which is embedded in the base member main portion 56a, and the fifth bus bar 55 is provided with a flat plate portion 55a in flush
with the second contact providing face 62, which is embedded in the base member main portion 56a.
A fourth fixed contact 74 is integrally provided with the flat plate portion 54a of the fourth bus bar 54 to project toward the rotor 34, a fifth fixed contact 75 is integrally provided with the flat plate portion 55a of the fifth bus bar 55 to
project toward the rotor 34, and a sixth fixed contact 76 is provided integrally with the second flat plate portion 53c of the third bus bar 53 to project toward the rotor 34. Further, the flat plate portions 54a and 55a, and the second flat plate
portion 53c are provided and arranged around the second recess portion 63 in such a way as to have areas as wide as possible in the second contact providing face 52, and the fourth through sixth fixed contacts 74 to 76 are integrally provided with the
flat plate portions 54a and 55a, and the second flat plate portion 53c in such a way that they are spaced from each other at intervals in the peripheral direction at the same distance from the rotation center of the rotor 34 to perform
connection/disconnection to/from the fourth through sixth movable contacts 44 to 46 of the rotor 34.
As is shown in FIG. 16, the bus bars 51 to 55 are integrally provided with terminal portions 77, 78, 79, 80 and 81 respectively, arranged in parallel at the window 56d of the base member 56 in a state where they are embedded in the base member
main portion 56a of the base member 56, and the terminal portions 77 to 81 are respectively provided with bonding faces 82, . . . facing the other face side of the base member 56, namely, the opposite side to the casing 22, and are formed in a generally
U-shape.
Meanwhile, the first through third bus bars 51, 52 and 53, and the fourth and fifth bus bars 54 and 55 are integrated in a state in which they are inserted into a die for molding the base member 56 to embed them into the base member 56. That is,
the flat plate portion 51a of the first bus bar 51 and the flat plate portion 52a of the second bus bar 52 are connected with a connecting portion 83, the flat plate portion 51a of the first bus bar 51 and the first flat plate portion 53a of the third
bus bar 53 are connected by a connecting portion 84, the first flat plate portion 53a of the third bus bar 53 and the flat plate portion 52a of the second bus bar 52 are connected with a connecting portion 85, and the terminal portions 77 and 78 of the
first and the third bus bars 51 and 53 are connected with a connecting portion 86, by which the first through third bus bars 51, 52 and 53 are integrated. Further, the flat plate portions 54a and 55a of the fourth and fifth bus bars 54 and 55 are
connected with a connecting portion 87 and the terminal portions 80 and 81 of the fourth and the fifth bus bars 54 and 55 are connected by a connecting portion 88, by which the fourth and fifth bus bars 54 and 55 are integrated.
By integrating the first through third bus bars 51 to 53 and integrating the fourth and fourth bus bars 54 and 55 in such a way, the positioning and arrangement of the bus bars 51 to 55 into the die is facilitated and simplification of the
constitution of the die can be achieved.
The connecting portions 83 to 88 are punched after the molding of the base member 56. That is, immediately after molding the base member 56 by mold-connecting the bus bars 51 to 55, on both faces of the base member main portion 56a of the base
member 56, recess portions for allowing both faces of the connecting portions 83, 84, 85 and 87 to face to the outside are formed, part of the connecting portions 83, 84, 85 and 87 are punched at portions thereof facing to the recess portions to form
through holes 89, 90, 91 and 92, and thereby the connecting portions 83 to 85 and 87 are cut. Further, in the holding portion 56b of the base member 56, punch escapements 93 and 94 are formed in the shape of an arcuate groove immediately after the
molding, and by carrying out punching in correspondence with the punch escapements 93 and 94, the connecting portions 86 and 88 are cut. Further, by punching the connecting portions 83 to 88 after molding the base member 56, the bus bars 51 to 55 are
arranged in the base member 56 in a state where they are electrically isolated from each other.
Further, in the base member main portion 56a, insertion holes 95 are provided at positions in correspondence with a pair of insertion holes 33, disposed in the flange portion 25b of the case 25, and insertion holes 96 in correspondence with the
insertion holes 95 are provided at the first flat plate portion 53a of the third bus bar 53.
Further, on the other face side of the base member main portion 56a, namely, on the opposite face thereof to the rotor 34, there are provided an opening portion 97.sub.1 for exposing the flat plate portion 51a of the first bus bar 51 to the
outside around the first fixed contact 71, an opening portion 97.sub.2 for exposing the flat plate portion 51a of the first bus bar 51 at a position away from the first fixed contact 71, an
opening portion 98.sub.1 for exposing the flat plate portion 52a of the second bus bar 52 to the outside around the second fixed contact 72, an opening portion 98.sub.2 for exposing the flat plate portion 52a of the second bus bar 52 at a
position away from the second fixed contact 72, an opening portion 99.sub.1 for exposing the first flat plate portion 53a of the third bus bar 53 to the outside around the third fixed contact 73, an opening portion 99.sub.2 for exposing the second flat
plate portion 53c of the third bus bar 53 to the outside around the sixth fixed contact 76, opening portions 99.sub.3, 99.sub.4, 99.sub.5 and 99.sub.6 for exposing the first flat plate portion 53a of the third bus bar 53 to the outside at a plurality of
locations, for example, four locations away from the third fixed contact 73, an opening portion 100 for exposing the flat plate portion 54a of the fourth bus bar 54 to the outside around the fourth fixed contact 74, and an opening portion 101 for
exposing the flat plate portion 55a of the fifth bus bar 55 to the outside around the fifth fixed contact 75.
Meanwhile, when the rotary member 23 of the cylinder lock device 21 is at the LOCK position, the relative arrangement in the peripheral direction of the first through third movable contacts 41 through 43 and the first through third fixed contacts
71 to 73 is shown in FIG. 17 and the relative arrangement in the peripheral direction of the fourth through sixth movable contacts 41 to 46 and the fourth through sixth fixed contacts 74 to 76 is shown in FIG. 18, in accordance with the rotation of the
rotary member 23 from the LOCK position to the ACC position, the first through sixth movable contacts 41 to 46 are disposed at positions displaced from the positions of FIG. 17 and FIG. 18 to the left side by 55 degrees, in accordance with the rotation
of the rotary member 23 from the ACC position to the ON position, the first through sixth movable contacts 41 to 46 are disposed at positions displaced from the positions of FIG. 17 and FIG. 18 to the left side by 90 degrees. Further, in accordance with
the rotation of the rotary member 23 from the | | |
