JPH10294040A - A switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve two opposite problems on each switch of a sliding contact type and a non-sliding contact type at the same time and enable using a switch commonly for switching of large and small electric current by providing a switch which supports an operating shaft holding a movable contact unit that can contact on a fixed contact unit in a switch case and switches contact and cut-off states of both contact units in accordance with the movement of the shaft. SOLUTION: A movable contact unit 30b is attached on an operating shaft 16 so that the unit 36 slips and contacts on a fixed contact unit 9f2 when the shaft 16 moves in a prescribed moving section, and a cam mechanism CA which displaces the movable contact unit 30b in the direction to float up from the fixed contact unit 9f2 linked with the movement of the operating shaft 16, is attached between a switch case 6 and the movable contact unit 30b. The movable contact unit 30b is floated up from the fixed contact unit 9f2 and the inside of the switch case 6 in the outside of the moving section of the operating shaft 16 by the cam mechanism CA.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch case in which a fixed contact portion is housed and fixed inside, and an operating shaft holding a movable contact portion capable of contacting the fixed contact portion is reciprocated in one axial direction thereof. The present invention relates to a switch which is supported so as to be capable of switching between a contact state and a cutoff state of the contact portions in accordance with the movement of the operation shaft.

[0002]

2. Description of the Related Art Such a switch is widely used, for example, as a switch for canceling a cruise operation of an automobile, and as a switch for other electric components.

As a conventional switch of this type, there is a sliding contact type switch in which a movable contact portion slides on a fixed contact portion so that the switch is closed when an operating shaft moves in a predetermined moving section. (For example, Japanese Utility Model Laid-Open No. 62-12473)
The movable contact portion is disposed so as to be able to be moved toward and away from the fixed contact portion in the direction of movement of the operating shaft, and the movable contact portion is connected to the fixed contact portion. A non-sliding contact type in which a switch is closed / opened by contacting / releasing to a fixed contact portion in accordance with movement of an operating shaft (see, for example, the contact portion in FIGS. 3 and 4 (a) of the same publication). There was.

[0004]

However, in the conventional switch of the sliding contact type, when the movable contact portion is in sliding contact with the fixed contact portion, the contact portions of the two contact portions are always self-cleaned, so that a small current can be obtained. (For example, 12 V, 1.5 A) is suitable for opening and closing, but on the other hand, the inner surface of the switch case (usually made of synthetic resin) to which the movable contact portion contacts when the switch is opened may be melted by the heat generated by opening and closing the switch. As a countermeasure against this, it is necessary to add one heat-resistant member, resulting in a problem that the cost increases. Further, it is impossible to reverse the phase of the switch only by changing the movable contact portion.

On the other hand, the conventional non-sliding contact type switch has a large current (eg, 12 V, 3 A) because the movable contact portion does not come into contact with the inner surface of the switch case when the switch is opened, and it is not necessary to take measures against heat generation. ) Has the advantage of being suitable for opening and closing, but on the other hand, it is not suitable for opening and closing small currents because the switch is closed and opened when the movable contact contacts and separates from the fixed contact.
If it is used for switching a small current, the number of parts increases and the cost increases. In addition, it is difficult to change the switching position of the switch, and it is also difficult to reverse the phase of the switch.

[0006] From the above circumstances, it has been difficult to use any type of switch for switching small and large currents.

The present invention has been made in view of such circumstances, and can simultaneously solve the conflicting problems of the above two types of switches, and can be used for both small current and large current switching. An object of the present invention is to provide a switch that can be used.

[0008]

In order to achieve the above object, according to the present invention, a movable contact which can be brought into contact with the fixed contact portion is provided at one end of a switch case in which a fixed contact portion is housed and fixed. Operating the fixed contact portion in a switch that supports the operating shaft holding the portion so that the operating shaft can reciprocate in the axial direction, and switches the contact / interrupt state between the two contact portions according to the movement of the operating shaft. The movable contact portion is mounted on the operating shaft such that the movable contact portion slides on the fixed contact portion when the operating shaft moves in a predetermined moving section; A cam mechanism is provided between the case and the movable contact portion to displace the movable contact portion in a direction in which the movable contact portion rises from the fixed contact portion in conjunction with the movement of the operating shaft. Said move Between the outside and the outside, the movable contact portion is characterized in that it floats up with respect to the fixed contact portion and the inner surface of the switch case. According to this feature, the sliding contact of the movable contact portion with the fixed contact portion causes the contact portions to contact each other. The self-cleaning function improves the reliability of the switch. In addition, when the switch is closed, the movable contact rises above the fixed contact and the inner surface of the switch case. It can be avoided without special use of members, and can be used for both small current and large current switching without problems. In addition, by simply changing the operation timing of the cam mechanism corresponding to the movement of the operation shaft, it is possible to easily change the switching position of the switch, and to easily reverse the phase of the switch.

In addition, in addition to the above-described features, the cam mechanism may further include a rib integrally formed on the inner surface of the switch case, and a side of the movable contact portion corresponding to the rib. And a cam arm part integrally formed with the ribs, whereby the desired switch characteristics can be reliably obtained with a simple cam structure, and the switch case is reinforced by integrating the ribs. .

According to a third aspect of the present invention, in addition to the features of the second aspect, a pair of contact arm portions serving as the movable contact portions are formed on a movable contact plate which is press-formed and mounted on the operating shaft. It is characterized in that the cam arm portion is a bridge portion which is arranged side by side in a direction orthogonal to the direction of movement of the operating shaft and is bridged between the pair of contact arms and integrally connects between the contact arms. As a result, the cam arm has a double-sided support structure and its strength is increased, and the stamping portion around the cam arm can be reduced as much as possible when press-molding the movable contact plate. It will be easier.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings.

In the accompanying drawings, FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a schematic view of an automobile braking device provided with a cruise cancel / stop switch device according to the embodiment; FIG. 2 is a longitudinal side view showing the switch device in a non-depressed state of a brake pedal (depressed state of an operating shaft); Is 3-3 in FIG.
4, FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 2, FIG. 5 is an enlarged cross-sectional view (an enlarged cross-sectional view taken along line 5-5 in FIG. 4) of a coupling portion between the operating shaft main body and the shaft head, FIG. FIG. 7 is a sectional view taken along the line 6-6 in FIG. 4, FIG. 7 is a simplified operation view of the cruise cancel switch section, and FIG. 8 shows a sub-assembly state in which the operating shaft main body is assembled in a switch case, corresponding to FIG. FIG. 9 is a sectional view similar to FIG. 2 showing an embodiment (second embodiment of the present invention) in which the phase of the cruise cancel switch is reversed, and FIG. FIGS. 11 to 14 are sectional views similar to FIG. 3 (end view taken along the line 10-10 in FIG. 9), showing the second embodiment, and FIGS.
3 and its partial sectional views showing an embodiment, and FIGS. 15 and 16 are sectional views (an operating shaft main body and an operating shaft main body) similar to FIG. 5 showing seventh and eighth embodiments of the present invention. It is an enlarged sectional view of the joint part with a shaft head.

First, a first embodiment shown in FIGS. 1 to 8 will be described. In FIG. 1, a brake pedal 2 pivotally supported by a vehicle body 1 of a motor vehicle and spring-biased rearward has a brake master actuated by forward (leftward in FIG. 1) swinging as the pedal is depressed. The cylinder 3 is connected. A cruise cancel / stop switch device 4 responsive to the brake pedal 2 is mounted on a bracket 5 fixed to the vehicle body 1 behind the pedal 2, and this switch device 4 is a cruise cancel switch in the upper half thereof. The unit 4C and the lower half stop switch unit 4S are unitized together. The cruise cancel switch 4C constitutes a switch of the present invention, and is connected to an auto cruise control circuit for driving a vehicle (not shown) at a constant speed.
Is connected to a brake lamp lighting circuit (not shown).

FIGS. 2 to 8 show a specific structure of the switch device 4. FIG. 2 to 4, the switch case 6 of the switch device 4 includes a box-shaped case body 6B and a case cap 6C, each of which is made of synthetic resin and has one end open. At the open end of the case body 6B, a pair of opposing connecting pieces 7, 7 are integrally formed so as to be elastically deformable, while the case cap 6C has a pair of engaging members on both outer surfaces thereof. Stop claws 8, 8 are formed. By engaging these locking claws 8, 8 with the locking holes 7a, 7a of the connecting pieces 7, 7, the case body 6 is formed.
B and the case cap 6C are integrally connected with each other with their open ends fitted in a cage.

The inner wall of the switch case 6 has an upper half
A pair of left and right first and second terminal plates 9 parallel to each other
₁, 9_TwoAre fixed, and in the lower half
A pair of left and right third and fourth terminal plates 9 facing each other_Three, 9_FourIs fixed
Is done. Those terminal boards 9₁~ 9_FourThe outer end of
Two sets of terminals 9a extending to the outside through the cap 6C ₁
~ 9a_FourAnd these terminals 9a₁~ 9a
_FourAnd integrated with the case cap 6C to surround them.
Coupler C with the shaped coupler housing 10₁But
This coupler C₁The control circuit and the lighting circuit
Another coupler C on the road_Two(See Figure 1) can be connected
ing.

The strip portions of the first and second terminal plates 9 ₁ and 9 ₂ along the inner wall surface of the switch case 6 are formed by a pair of fixed contact portions 9f ₁ and 9f ₂ of the cruise cancel switch portion 4C.
Constitute a and the pair of third, fourth terminal plate 9 _3, 9 _4, the inner end portions of the U-shaped bent portion along the inner wall surface of the switch case 6, the fixed contact member of the thick A pair of fixed contact portions 9f of the stop switch portion 4S which are integrally provided.
_3, constitute a 9f _4. In the switch case 6,
A movable contact member of the thick respectively integrally third, fourth terminal plate 9 _3, 9 ₄ fixed contact portions 9f _3, 9f ₄ to a pair of movable contacts 11a ₃ respectively facing, 11a ₄ across the And a coil-shaped closing spring 12 for biasing the stop switch movable contact plate 11 attached to the movable contact plate 11 toward the fixed contact portions 9f ₃ and 9f ₄ .

Referring again to FIG. 2, the base end of a hollow metal mounting bolt 13 is molded to the end wall of the case body 6B, and the switch device 4 is formed by the mounting bolt 13 and a nut 14 screwed thereto. Is detachably attached to the bracket 5.

A relatively thin partition wall 15 is formed in the end wall of the case body 6B to partition between the hollow portion of the mounting bolt 13 and the inside of the case body 6B. Shaft hole 15a smaller in diameter than
And a tapered hole 15b whose diameter increases from the shaft hole 15a toward the hollow portion of the mounting bolt 13. Partition wall 1
5 has a stopper surface 1 perpendicular to the axis of the shaft hole 15a.
5c is formed.

An operating shaft 16 made of synthetic resin is slidably fitted in the hollow portion of the mounting bolt 13. This operating shaft 16
The operating shaft body 17 has one end protruding and retracting from the mounting bolt 13 and slidably fitted in the hollow portion of the mounting bolt 13.
And a shaft head 18 detachably connected to the other end (inner end) of the operating shaft main body 17. The inner end side of the operating shaft body 17 is a small-diameter shaft portion 17a,
The shaft hole 15a is formed on the outer periphery near the end of the small diameter shaft portion 17a.
A flange 19 having a larger diameter is formed, and an outer peripheral surface on the distal end side of the flange 19 is formed as a tapered surface 20 that can engage with the tapered hole 15b to expand the diameter of the shaft hole 15a. ,
As a stopper surface 21 that can come into contact with the stopper surface 15c, the stopper surface 21 stands at right angles from the outer peripheral surface of the small-diameter shaft portion 17a.

When the operating shaft main body 17 is inserted with a certain load into the shaft hole 15a from the outer end side of the mounting bolt 13 through the hollow portion thereof, the flange portion 19 passes through the shaft hole 15a while expanding the diameter of the shaft hole 15a. After the passage, the shaft hole 15a is restored to its original shape by elasticity, and the abutment between the stopper surfaces 15c and 21 causes the flange 1
9 is prevented from being pulled out from the shaft hole 15a. The position of the operating shaft main body 17 at this time is the retracted position, and the operating shaft main body 17
(Therefore, the return coil spring 22 for urging the operating shaft 16)
Is mounted on the outer periphery of the small-diameter shaft portion 17 a within the mounting bolt 13, and the movable end of the spring 22 is supported on the outer surface of the partition wall 15. The stopper surfaces 15c and 21 cooperate with each other to constitute stopper means for holding the operating shaft main body 17 at a predetermined retracted position (see FIG. 8) against the urging force of the spring 22.

The shaft portion of the small-diameter shaft portion 17a, which is closer to the tip end than the flange portion 19, has a slit-shaped notch 2 opening at the shaft end.
4, a pair of elastically deformable engagement claws 23 arranged in parallel with each other
23, and the outer peripheral surfaces of both engaging claws 23, 23 are
The engaging projections 2 are formed on flat flat surfaces 23f, 23f parallel to each other, and are provided on the outer periphery of the distal end of each engaging claw 23.
3a is integrally formed, and the locking projection 23a can be detachably locked to an opening edge of an engaging hole 25c of the substrate 25 described below.

The shaft head 18 is provided with the engaging claws 23, 23
Has an engaging hole 25a into which the operating shaft 1 is detachably inserted.
6, a board part 25 orthogonal to the sliding direction,
And a flat rectangular contact holding portion 26 integrally extending along the sliding direction from one side end near the cruise canceling switch portion 4C. A small projection 25b that can fit into the small hole 11b of the movable contact plate 11 of the switch section 4S is integrally provided. A bridging portion 25c extending in the diameter direction at the opening of the engaging hole 25a is formed integrally with the substrate portion 25 so as to correspond to the slit-shaped cutout portion 24. The bridging portion 25c Insert the claws 23, 23 into the engagement holes 25a.
When the insertion engagement is performed, the positioning guide action can be exerted on each of the claws 23. After the insertion engagement is completed, an external force acts between the shaft head 18 and the operating shaft main body 17 in the separating direction. In this case, each engaging claw 23 (the locking projection 2
The bridging portion 25c can effectively prevent the deformation of 3a) from being detached from the opening edge of the engagement hole 25a, so that the shaft head 18 is not easily detached from the operating shaft main body 17. I have.

The fixed contact portions 9f ₁ , 9 of the holding portion 26
_On the surface facing f2, there is a cruise cancel switch 4
The base 30m of the movable contact plate 30 of C is fixed (fused 31 in the illustrated example). The movable contact plate 30 is formed by pressing a conductive metal plate and integrally formed.
From 0 m, the pair of first contact arm part 30a always in sliding contact with the fixed contact portion 9f ₁ of the first terminal plate 9 _1, 30a
When the movable contact actuation shaft 16 to contact sliding the predetermined movement section slides on the fixed contact portion 9f ₂ by the second terminal plate 9 ₂ time (in this embodiment sliding a predetermined distance from the retracted position) A second contact arm portion 30b as a portion extends in parallel and integrally with each other in a direction orthogonal to the sliding direction of the operating shaft 16. A thick movable contact member is integrally fixed to a free end of the second contact arm portion 30b serving as the movable contact portion in order to enhance durability.

Switch case 6 and second contact arm 30
Between is b, a cam mechanism CA be displaced in a direction to float the contact arm portions 30b from the fixed contact portion 9f ₂ in association with the movement of the actuating shaft 16 is provided by the cam mechanism CA, operating shaft 16 outside the said travel zone
And adapted to float a predetermined height contact arm portion 30b relative to the fixed contact portion 9f ₂ and the switch case 6 inner surface. In the illustrated example, the cam mechanism CA includes a rib 32 integrally formed on the inner surface of the switch case 6 between the fixed contact portions 9f ₁ and 9f ₂ , and an inner side of the second contact arm portion 30b corresponding to the rib 32. And a cam arm 33 integrally protruded from the cam arm 33.

As is apparent from FIG. 4, an uneven portion substantially corresponding to the cross-sectional shape of the shaft head 18 is formed on the inner wall surface of the switch case 6.
The rotation with respect to the axis of the operating shaft 16 is regulated by the engagement with the shaft 8, so that the operating shaft 16 (therefore, the shaft head 18) can always slide back and forth along the axis in a substantially constant posture. .

Next, the operation of this embodiment will be described. In assembling the switch device 4, as shown in FIG. 8, the operating shaft main body 17 having the return coil spring 22 mounted on the outer periphery of the small diameter shaft portion 17a is attached to the mounting bolt 1 of the case body 6B.
3 is inserted from the outer end side thereof, and when a predetermined pushing force is applied, the shaft hole is formed by the engagement between the tapered surface 20 of the flange 19 of the small diameter shaft portion 17a and the tapered hole 15b of the partition wall 15 as described above. Since the diameter of 15a is enlarged, the flange portion 19 can pass through the shaft hole 15a, and at this time, the fixed end of the return coil spring 22 can be received by the partition wall 15. After the passage, the flange portions 19 are prevented from being pulled out by the contact between the stopper surfaces 15c and 21. Thus, the small assembly 40 in which the operation shaft main body 17 is assembled into the case body 6B of the switch case 6 is assembled.

Furthermore, the movable contact plate 30 holds the engaging claw 23 at the tip of the operating shaft main body 17 in the small assembly 40 with the holding portion 26.
Is snap-engaged with an engaging hole 25a of the shaft head 18 previously fixed to the shaft head 18, and the shaft head 18 is connected to and integrated with the operating shaft main body 17 to assemble the operating shaft 16, whereby the operating shaft 1
A first assembly in which 6 is set on the switch case 6 (case body 6B) is manufactured.

On the other hand, the terminal caps 9 _{1 to} 9 ₄ and the movable contact plate 1 on the side of the stop switch section 4S are provided on the case cap 6C.
The first assembly and the closing spring 12 are assembled in advance to produce the second assembly. Then, the assembly of the switch device 4 is completed by connecting the case bodies 6B and the case caps 6C of the first and second assemblies thus manufactured individually. Note that when the coupling operations of the case body 6B and the case cap 6C, preformed inner end of each terminal plate 9 _to 93 ₄ fixed to the case cap 6C side, the inner wall of the case body 6B correspond to those Into the engaging grooves to be inserted.

As shown in FIG. 1, when the brake pedal 2 is held at the rest position (non-depressed state),
An operating shaft 16 which is operated forward (pushed) by the pedal 2
Separates the movable contact plate 11 of the stop switch unit 4S from the fixed contact units 9f ₃ and 9f ₄ against the force of the closing spring 12, so that the stop switch unit 4S is in the OFF state, while the cruise cancel is performed. The movable contact portion 30b of the switch portion 4C also sets the switch portion 4C to the off state (see FIG. 7A) by the cam arm 33 integral with the movable contact portion 30C riding on the top of the rib 32.

Now, when the brake pedal 2 is depressed to perform braking, the operating shaft 16 is retreated by the repulsive force of the return coil spring 22 so as to follow the depression, and the stop switch section 4S
The movable contact portions 11a ₃ and 11a ₄ of the movable contact plate 11 move toward the fixed contact portions 9f ₃ and 9f ₄ by the repulsive force of the closing spring 12, and the stop switch portion 4S is turned on, thereby turning on the braking lamp. The circuit is turned on to turn on the braking lamp. When the operating shaft 16 is retracted by a predetermined distance, the movable contact 3 of the cruise cancel switch 4C is moved.
0b is therewith come to the fixed contact portion 9f ₂ and the sliding contact by the cam arms 33 integral away down the top of the ribs 32 (see (b) → (c) in FIG. 7), thereby The switch section 4C is turned on, and a cancel signal is given to the auto cruise control circuit.

Next, when the brake pedal 2 is released to release the braking, the brake pedal 2 retreating to the rest position returns the operating shaft 16 and advances again against the urging force of the coil spring 22 and the closing spring 12, and Thereby, each switch unit 4
C and 4S return to their original positions and are turned off.

The operating shaft 16 of the switch device 4 is
This is connected to the operating shaft main body 17 and the holding portion 2
6 and is divided into a shaft head 18 coupled to an operating shaft main body 17, and particularly in the cruise cancel switch unit 4C, the shaft head is changed by switching the phase of the switch, adding a variation, or changing the model. When the shape or structure of the operation shaft 18 or the operation shaft main body 17 is changed, only the shape and structure of the shaft head 18 or the operation shaft main body 17 related to the change need only be changed. Since the shaft head 18) can be used as it is and can be kept to a minimum change, the change is very easy and the cost can be reduced. Even if there are many variations of the switch section 4C, the operation shaft main body 17 or the shaft head 18 can be shared as much as possible, so that cost reduction is achieved and parts management becomes easy.

In addition, the main part of the operating shaft (operating shaft main body 17) except the shaft head 18 is attached to the switch case 6 by the small assembly 4
0 (so-called sub-assembly), it is easy to assemble the operating shaft 16 as a whole, and the small assembly 40 is attached to the shaft head 18 (movable contact plate 3).
0) can be commonly used for switches of various variations that differ only in the structure of 0). When assembling the switches, simply press the engaging claw 23 into the engaging hole 25a.
3 can be easily snap-engaged with the engagement hole 25a, so that the shaft head 18 can be easily and accurately assembled to the operating shaft main body 17 even in the state of the small assembly 40.

In particular, the cruise cancel switch unit 4
C, the fixed contact portion 9f of the movable contact portion 30b
_The sliding contact with ₂ not only provides a self-cleaning function of those contact portions and improves the reliability of the switch, but also when the switch portion 4C is closed, the movable contact portion 30b is fixed by the lift action of the cam mechanism CA. 9f ₂ and the switch case 6 can be forcibly lifted from the inner surface of the switch case 6 by a predetermined height.
Can be avoided without specially using expensive heat-resistant members. As a result, the switch mechanism 4C can be used for opening and closing both small current and large current without any problem, and the versatility of the switch unit 4C is improved.
By simply changing the operation timing (specifically, the lift curve of the cam, that is, the shape of the rib 32), it is possible to easily change the open / close switching position of the switch section 4C, and further, to invert the phase of the switch section 4C. (See the second embodiment described below).

FIGS. 9 and 10 show a second embodiment of the present invention, in which the arrangement of the movable contact plate 30 of the cruise cancel switch unit 4C is reversed from that of the previous embodiment.
Is the same as that of the previous embodiment except that the phase of the second embodiment is reversed with respect to the previous embodiment (the ON / OFF switching manner of the switch unit 4C is reversed). Corresponding parts are denoted by the same reference numerals.

In this embodiment, as shown in FIG. 1, when the brake pedal 2 is held at the rest position, the operating shaft 1 in the pushed-in state (forward operation state).
6, the movable contact portion 30b of the cruise cancel switch portion 4C has a cam arm 33 integral with the movable contact portion 30b.
2 not yet ride on (i.e. cam mechanism CA is inoperative), the in contact with the fixed contact portion 9f _2,
The switch unit 4C is turned on.

In this state, if the brake pedal 2 is depressed and the operating shaft 16 retreats by a predetermined distance due to the repulsive force of the return coil spring 22, the movable contact portion 30b of the cruise cancel switch portion 4C is moved by the cam arm portion 33 integrated therewith. now lifted from the stationary contact portion 9f ₂ by rides on top of the ribs 32, thereby the switch unit 4C is turned off, the cancel signal to the automatic cruise control circuit (in the second embodiment of the switch unit 4C (A cancel signal is output in the OFF state).

FIG. 11 shows a third embodiment of the present invention. Only the structure of the movable contact plate 30 and the structure of the cam mechanism CA in the cruise cancel switch section 4C are different.
Otherwise, the configuration is the same as that of the first embodiment.
The same reference numerals are given to the parts corresponding to the embodiment. In this embodiment, from base 30m of movable contact plate 30, one of the first contact arm part 3 always in sliding contact with the fixed contact portion 9f ₁
0a and a pair of second contact arm portions 30 serving as movable contact portions
b and 30b are extended in parallel and integrally at intervals in a direction perpendicular to the direction of movement of the operating shaft 16, and are bridged between the pair of second contact arms 30b and 30b so as to be integrated therewith. The bridge portion 33 connected to the cam arm portion becomes the cam arm portion. At least one of the second contact arm portions 30b
, A thick movable contact member is integrally fixed.

According to the third embodiment, the cam arm 3
3 is a two-sided support structure, which enhances durability and minimizes the number of punched portions around the cam arm portion 33 when press-molding the movable contact plate 30, so that the press-forming die can be easily manufactured. Become.

FIG. 12 shows a fourth embodiment of the present invention. Only the structure of the movable contact plate 30 and the structure of the cam mechanism CA in the cruise cancel switch section 4C are different. It has a similar configuration.
The same reference numerals are given to the parts corresponding to the first embodiment. In this embodiment, the cam arm 33, projecting from the outer side of the second contact arm part 30b as a movable contact portion, the ribs 32 are arranged on the outside of the stationary contact portion 9f ₂ correspondingly.

FIG. 13 shows a fifth embodiment of the present invention. Only the structure of the movable contact plate 30 and the structure of the cam mechanism CA in the cruise cancel switch section 4C are different. It has a similar configuration.
The same reference numerals are given to the parts corresponding to the first embodiment. In this embodiment, four contact arm portions 30b, which are movable contact portions, are connected to the operating shaft 1 from the base 30m of the movable contact plate 30.
6 are extended in parallel and integrally at intervals in a direction perpendicular to the direction of movement of the pair of contact arms 6, and a pair of contact arms 30 at the center thereof
b, 30b, and a bridge portion that integrally connects between them, and an arm portion integrally protruded outside each of the contact arms 30b, 30b on both outer sides become cam arm portions 33, 33, 33, respectively. Correspondingly, ribs 32 are formed in the middle and outside of the fixed contact portions 9f ₁ and 9f ₂ respectively.

FIG. 14 shows a sixth embodiment of the present invention. Only the structure of the movable contact plate 30 in the cruise cancel switch section 4C, the structures of the fixed contact sections 9f ₁ and 9f ₂ and the cam mechanism CA are different. Otherwise, the configuration is the same as that of the fifth embodiment. In the drawing, the same reference numerals are given to portions corresponding to the fifth embodiment. In this embodiment, the cam arms 33 projecting from the outer sides of the contact arms 30b on both sides in the fifth embodiment and the ribs 3 corresponding thereto are provided.
2 are omitted, and instead, the fixed contact portions 9f ₁ and 9f ₂
, The center of both the second contact arm part 30b, 30b is the stationary contact portion 9f ₁ by the lift action of the cam mechanism CA, 9f
Each contact arm 30 on both outer sides before rising from ₂
b, as 30b and the fixed contact portion 9f _1, 9f ₂ while is shut off, the contact arm 30b of the both outer, notches 50 corresponding to 30b are formed in the notch 50,
The synthetic resin inner wall of the switch case 6 has a fixed contact 9f.
₁ and 9f ₂ are disposed so as to be flush with each other. In this embodiment, each of the outer contact arms 30b, 30b
And the fixed contact portions 9f ₁ and 9f ₂ are cut off first, and then the central second contact arm portions 30b and 30b are lifted up from the fixed contact portions 9f ₁ and 9f ₂ to be cut off. There is an advantage that heat generated due to interruption / connection can be concentrated on the non-sliding contact portion.

FIG. 15 shows a seventh embodiment of the present invention, which differs from the first embodiment only in the structure of the joint between the operating shaft body 17 and the shaft head 18 in the cruise cancel switch 4C. Otherwise, the configuration is the same as that of the first embodiment. In the drawing, the same reference numerals are given to portions corresponding to the first embodiment. In this embodiment, the operation shaft main body 17 (small diameter shaft portion 1)
7a), the inwardly extending locking projections 23a, 23a
A pair of engaging claws 23, 23 each formed at the tip thereof, and a support protrusion 41 located in the middle of the two engaging claws 23, 23 are integrally provided. On the other hand, the shaft head 18 (the substrate 2
In the receiving part 40 integrally formed so as to cross the opening of the engaging hole 25a in 5), holes 40h for inserting the support protrusions 41 are formed, and the engaging claws 2 are formed on both outer sides of the receiving part 40.
3 and 23 respectively (that is, the engagement claws 23 and 23
To hold the receiving portion 40 from both sides).

FIG. 16 shows an eighth embodiment of the present invention, which differs from the first embodiment only in the structure of the joint between the operating shaft main body 17 and the shaft head 18 in the cruise cancel switch section 4C. Otherwise, the configuration is the same as that of the first embodiment. In the drawing, the same reference numerals are given to portions corresponding to the first embodiment. In this embodiment, extensions 23e, 23e are integrally protruded from the tips of the engagement claws 23, 23 in the operating shaft main body 17, and the heating means 50 is pressed against the extensions 23e, 23e to heat and melt. A hemispherical fusion portion 51 is formed integrally between the tips of the engagement claws 23 and 23 and covers the bridging portion 25c so as to extend therebetween, thereby operating the shaft head 18 (the substrate portion 25). It is fused to the shaft body 17.

Although the first to eighth embodiments of the present invention have been described above, various design changes can be made to the present invention without departing from the gist thereof. For example, the mounting bolt 13 may be made of synthetic resin and formed integrally with the case body 6B. Also, as shown in the second embodiment in which the phase of the switch section 4C of the first embodiment is reversed, the phase of the switch section 4C may be reversed in the third to sixth embodiments as well. In the eighth embodiment, the shaft head 18 is connected to the operating shaft body 1.
7, the shaft head 18 may be fixed to the operating shaft main body 17 by other appropriate fixing means (for example, press-fitting, caulking, etc.) instead of the fusion-bonding. Further, in each embodiment, the movable contact plate 30 is fused to the contact holding portion 26 of the shaft head 18, but instead of this fusion, other appropriate fixing means (for example, press-fitting, caulking, etc.) Alternatively, the movable contact plate 30 may be fixed to the contact holding portion 26 by using the above method.

[0046]

As described above, according to the invention of each claim,
The fixed contact portion is disposed substantially along the moving direction of the operating shaft, and the movable contact portion is attached to the operating shaft so as to make sliding contact on the fixed contact portion when the operating shaft moves in a predetermined moving section. A cam mechanism is provided between the switch case and the movable contact section to displace the movable contact section in a direction in which the movable contact section rises from the fixed contact section in conjunction with the movement of the operating shaft. Outside the section, the movable contact part is raised to the fixed contact part and the inner surface of the switch case, so that the sliding contact of the movable contact part with the fixed contact part provides a self-cleaning function for those contact parts, thus improving the reliability of the switch. In addition to improving heat resistance, the movable contact part is raised above the fixed contact part and the inner surface of the switch case when the switch is closed, so that the problem of melting of the case due to heat generation is an expensive heat-resistant part. It is avoided without using a special,
Therefore, it can be used for both small current and large current switching without any problem, and the versatility of the switch is enhanced. In addition, by simply changing the operation timing of the cam mechanism corresponding to the movement of the operation shaft, it is possible to easily change the switching position of the switch, and to easily reverse the phase of the switch.

According to the second aspect of the present invention, the cam mechanism includes a rib integrally formed on the inner surface of the switch case and a cam arm portion integrally formed on one side of the movable contact portion corresponding to the rib. , The desired switch switching characteristics can be reliably obtained with a simple cam structure,
The formation of the ribs reinforces the switch case.

According to the third aspect of the present invention, a pair of contact arms serving as movable contact portions are formed on a movable contact plate which is press-formed and mounted on an operating shaft in a direction orthogonal to the moving direction of the operating shaft. The bridge is bridged between the pair of contact arms, and the bridge that connects between them is a cam arm, so that the cam arm has a double-supported support structure and durability is improved. Also, since the punched portion around the cam arm can be minimized when press-molding the movable contact plate, it is easy to manufacture the press-molding die.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vehicle braking device provided with a cruise cancel / stop switch device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view showing the switch device in a non-depressed state of a brake pedal (a depressed state of an operating shaft).

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is an enlarged cross-sectional view (an enlarged cross-sectional view taken along line 5-5 in FIG. 4) of a joint between the operating shaft main body and the shaft head;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 4;

FIG. 7 is a simplified operation diagram of a cruise cancel switch unit.

FIG. 8 is a cross-sectional view corresponding to FIG. 2 (where the operating shaft main body is not pushed in) showing a sub-assembly state in which the operating shaft main body is assembled into a switch case in a small manner.

FIG. 9 is a sectional view similar to FIG. 2, showing an embodiment (second embodiment of the present invention) in which the phase of the cruise cancel switch is reversed.

FIG. 10 is a cross-sectional view similar to FIG. 3, showing the second embodiment (end view along line 10-10 in FIG. 9);

FIG. 11 is a sectional view similar to FIG. 3 and a partial sectional view thereof, showing a third embodiment of the present invention;

FIG. 12 is a sectional view similar to FIG. 3 and a partial sectional view thereof, showing a fourth embodiment of the present invention;

FIG. 13 is a sectional view similar to FIG. 3 and a partial sectional view thereof, showing a fifth embodiment of the present invention;

FIG. 14 is a sectional view similar to FIG. 3 and a partial sectional view thereof, showing a sixth embodiment of the present invention;

FIG. 15 is a cross-sectional view similar to FIG. 5 (an enlarged cross-sectional view of a coupling portion between an operation shaft main body and a shaft head), showing a seventh embodiment of the present invention.

FIG. 16 is a sectional view similar to FIG. 5, showing an eighth embodiment of the present invention (an enlarged sectional view of a joint portion between an operating shaft main body and a shaft head).

[Explanation of symbols]

CA: cam mechanism 4C: cruise cancel switch as switch 6: switch case 9f _2: fixed contact 16: operating shaft 30: movable contact plate 30b: second contact arm as movable contact 32; rib 33: cam arm

Claims (3)

[Claims] An operation in which a movable contact part (30b) capable of contacting the fixed contact part (9f ₂ ) is held at one end of a switch case (6) in which a fixed contact part (9f ₂ ) is housed and fixed inside. A switch which supports the shaft (16) so as to be able to reciprocate in the axial direction thereof, and switches the contact / interrupt state between the two contact portions (9f ₂ , 30b) according to the movement of the operating shaft (16). In the above, the fixed contact portion (9f ₂ ) is disposed substantially along the moving direction of the operating shaft (16), while the movable contact portion (30f ₂ ) is arranged.
b) is attached to the operating shaft (16) so that the operating shaft (16) slides on the fixed contact portion (9f ₂ ) when the operating shaft (16) moves in a predetermined moving section. Between the movable contact part (30b) and the movable contact part (3
0b) is displaced in a direction in which it rises from the fixed contact portion (9f ₂ ) in conjunction with the movement of the operating shaft (16). A cam mechanism (CA) is provided by the cam mechanism (CA). 16) The switch wherein the movable contact portion (30b) is raised with respect to the fixed contact portion (9f ₂ ) and the inner surface of the switch case (6) outside the moving section of 16). The cam mechanism (CA) has a rib (32) integrally formed on the inner surface of the switch case (6).
And the movable contact portion (30) corresponding to the rib (32).
2. A switch according to claim 1, characterized in that the switch comprises a cam arm part (33) integrally formed on one side of b). 3. A pair of contact arms (30b, 30b) serving as said movable contact portions are formed on a movable contact plate (30) which is press-formed and mounted on said operating shaft (16). And a bridge portion (33) bridged between the pair of contact arms (30b, 30b) and integrally connected therebetween is provided as the cam arm portion. 3. The switch according to claim 2, wherein the switch is characterized by: