JPH0134254Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field The invention is a switch device, in particular, a switch device that opens or closes two mutually independent circuits at the same time by sliding the operating lever. This invention relates to a switch device that enables

(2) Prior Art The above-mentioned switch device includes a switch case having a guide portion that guides and supports an operating rod so as to be slidable in its axial direction, and a pair of first and second terminals, and a pair of first and second terminals, respectively. a pair of first fixed contacts to be connected, a closed position in which the first fixed contacts are in contact with each other and electrically conductive between the two first fixed contacts, and a closed position in which the first fixed contacts are spaced apart from the first fixed contacts. a first movable contact that can move in the axial direction in conjunction with the sliding of the operating rod between open positions that interrupt the contacts; and a pair of second fixed contacts that are respectively connected to the second terminals. , a closed position in which it contacts both the second fixed contacts and conducts the two second fixed contacts to each other, and an open position in which it is separated from the both second fixed contacts and blocks the two second fixed contacts from each other, a second movable contact that can move in the axial direction in conjunction with the sliding of the operating rod;
When the first movable contact is in the closed position, its movement toward the operating rod is restricted by contact with both the first fixed contacts, and both ends of the second movable contact are connected to the switch. A pair of opposing guide surfaces formed in the case and extending in the axial direction are slidably abutted, and each guide surface is in contact with the first guide surface.
each second fixed contact contacts the second movable contact end when the movable contact is in the open position, and contacts the second movable contact end when the first movable contact is in the closed position. A structure in which insulators are arranged adjacent to each other is conventionally known (for example, see Japanese Utility Model Publication No. 50-9574).

(3) Problems to be solved by the invention In the conventional device described above, the first and second movable contacts are integrally connected to the operating lever, so there is no sliding play between the operating lever and the switch case guide. When the operating rod is tilted to some extent due to There is a risk of poor contact.

This invention was proposed in view of the above,
It is an object of the present invention to provide a switch device that can solve the above-mentioned problems of conventional devices.

B. Structure of the device (1) Means for solving the problem In order to achieve the above object, the present invention provides a switch case having a guide section that guides and supports the operating rod so as to be slidable in the axial direction thereof. a pair of first fixed contacts connected to the first and second terminals of the first and second terminals, a closed position in which the first fixed contacts are brought into contact with each other, and the first fixed contacts are electrically connected to each other; Both first fixed contacts are spaced apart from both first fixed contacts.
A first movable in the axial direction in conjunction with the sliding of the operating rod between open positions where the fixed contacts are mutually isolated.
a movable contact, a pair of second fixed contacts connected to both the second terminals, and a closed position in which the two second fixed contacts are brought into contact with each other and electrically connected to each other;
and a second movable contact that can be moved in the axial direction in conjunction with the sliding movement of the operating rod between open positions that are spaced apart from the second fixed contacts and that isolate the second fixed contacts from each other. , when the first movable contact is in the closed position, movement toward the operating rod is regulated by contact with both the first fixed contacts, and both ends of the second movable contact are in the closed position. The switch case is slidably abutted against a pair of opposing guide surfaces formed in the switch case and extending in the axial direction, and each guide surface is in contact with the first movable contact when the first movable contact is in the open position. 2, each of the second fixed contacts contacting an end of the movable contact and an insulator contacting the end of the second movable contact when the first movable contact is in the closed position are arranged adjacent to each other. In the switch device, a pair of guide grooves extending along the axis of the operating rod and facing each other with the axis in between are formed on the inner surface of the switch case independently from each of the guide surfaces. Additionally, both ends of the first movable contact are slidably fitted into both guide grooves, and an intermediate portion of the second movable contact is integrally coupled to an intermediate portion of the first movable contact. A movable contact assembly is constructed, and a first spring is provided between the movable contact assembly and the switch case to spring the movable contact assembly toward the operating rod, and the movable contact assembly further includes a first spring. , one end of the operating lever facing inside the switch case is brought into contact with the operating lever so as to be removable, and a space between the operating lever and the switch case is provided on a side where the operating lever is separated from the movable contact assembly. The present invention is characterized in that a resilient second spring is compressed, and a stopper means is provided between the guide portion and the operating rod to prevent the operating rod from separating from the guide portion.

(2) Effect If the operating rod is slid toward the movable contact assembly against the elastic force of the second spring, the movable contact assembly that comes into contact with one end of the operating lever will respond to the elastic force of the first spring. The first movable contact moves integrally with the operating rod against the force, and as a result of this movement, the first movable contact separates from both the first fixed contacts and cuts off between the two first fixed contacts, while the second movable contact It contacts both second fixed contacts to establish electrical continuity between both second fixed contacts.

Furthermore, when the operating lever is slid to the side opposite to the movable contact assembly, the movable contact assembly is urged by the elastic force of the first spring and moves to follow the operating lever. After this movement causes the first movable contact to come into contact with the first fixed contact to establish electrical continuity between both the first fixed contacts, the movement of the movable contact assembly stops and only the operating rod moves. When the movable contact assembly is in a stopped state, the second movable contact is in contact with the insulator to cut off the connection between the two second fixed contacts.

Particularly, in the switching operation described above, the movable contact assembly is not only caused by contact between the guide surface in the switch case and both ends of the second movable contact, but also by contact between a guide groove independent of the guide surface and the first movable contact. Since stable sliding guidance can be achieved by fitting both ends, even though the movable contact assembly is separate from the operating rod, the assembly does not rotate or operate accidentally. There is no risk of it collapsing against the rod axis. Furthermore, because the movable contact assembly and the end of the operating rod are brought into contact with each other so that they can move toward and away from each other, the operating rod will not fall down to some extent due to sliding play between it and the switch case guide. However, the collapse is not directly transmitted to the movable contact assembly.

(3) Embodiment Hereinafter, an embodiment in which the present invention is applied to a switch device for opening and closing a stop lamp circuit and a constant speed running control circuit for a vehicle will be described with reference to the drawings.

Reference numeral 1 designates a switch case, which includes a case body 2 made of synthetic resin, a metal cover 4 fitted to the case body 2 and attached by bending a pair of short pieces 3 to the outer end surface of the case body 2, and Consisting of a hollow threaded cylinder 23 fixed to the end face, the threaded cylinder 23
It is fixed near the brake pedal 27 of the vehicle body by a nut (not shown) screwed onto the outer periphery of the brake pedal 27.

The threaded cylinder 23 constitutes the guide section of the present invention, and a rod-shaped operating rod 24 is inserted and supported in the threaded cylinder 23 so as to be slidable in the axial direction. A second spring 26 that springs the operating rod 24 toward the brake pedal ₂₇ is compressed between the flange portion 25 protruding from the outer periphery of the case body 2 and the later-described dish-shaped half 22 of the case body 2. Ru. The operating rod 24 is prevented from coming off toward the brake pedal 27 by contacting the flange member 25 with the inner end surface 23a of the threaded tube 23, and the inner end surface 23a and the flange portion 25
constitutes the stopper means S of the present invention. The operating rod 24 is pushed by the brake pedal 27 and held at the solid line position in FIG. 1 in a non-braking state where the brake pedal 27 is not operated.

The case body 2 has a cylindrical half 2 ₁ fitted with a dish-shaped half 2 ₂ , and the outer end surface of the cylindrical half 2 ₁ is connected to a stop lamp circuit as a first circuit. A pair of first terminals 5 and a pair of second terminals 6 connected to a constant speed running control circuit as a second circuit.
are provided protrudingly with a space between them.

On the inner circumferential surface of the cylindrical half body ₂₁ , there are two pieces 1 on the top and bottom, left and right sides extending parallel to each other in the axial direction.
A pair of movable contact guide grooves 7 and 8 are formed, and a support 9 is integrally provided on the inner end surface of the cylindrical half body ₂₁ and extends to the middle of each guide groove 7 and 8. A support protrusion 10 is formed on the end face. Cylindrical half 2 ₁
A pair of through holes 11 are formed in the peripheral wall of the guide groove 7 in parallel with the bottom surface of the first guide groove 7, and a first conductor 12 is inserted and held in each through hole 11, respectively. Each first conductor 1
2 is connected to each of the first terminals 5, and each other end is bent inward at the open end of the first guide groove 7 (left end in FIG. 1) to form a first fixed contact 13. Both ends of a U-shaped first movable contact 14 are slidably fitted into the first guide groove 7 so as to face each first fixed contact 13, and the both ends are bent at right angles. The guide groove 7 is slidably in surface contact with the flat bottom surface _G1 of the first guide groove 7. Thus, the first guide groove 7 constitutes the guide groove of the present invention.

A flat second conductor ₁₇ that crosses the bottom space of each second guide groove 8 is fixed to the cylindrical half body 21 near the bottom of each second guide groove 8, and the outer end of each second conductor 17 is formed into a cylinder. The shaped halves 2 ₁ extend outward through the insertion holes 18 in the end walls and are connected to the second terminals 6, respectively. A window 19 is formed in the middle of each second conductor 17, and each window 19 has a protrusion of a synthetic resin insulator 20 interposed between the second conductor 17 and the bottom surface of the second guide groove 8. mated. Therefore, the insulator 20
A part of the second conductor adjacent to the second terminal 6 side constitutes the second fixed contact 17a of the present invention, and the second fixed contact 17a and the insulator 20 are connected to each other as described below. Both ends 22 of the second movable contact 21
A flat guide surface G ₂ is formed on which the guide surface G 2 is slidably abutted.

The middle part of the bifurcated second movable contact 21 is integrally connected to the middle part of the first movable contact 14,
Both movable contacts 14 and 21 constitute a movable contact assembly C of the present invention. And the second movable contact 21
Both ends 22 of the second fixed contact 1 enter into the second guide groove 8 and come into sliding contact with the guide surface _G2 .
7a and the insulator 20 can be selectively contacted.

A first spring 15 that biases the movable contact assembly C toward the operating rod 24 is installed between the movable contact assembly C and the tip of the pillar 9, and the end of the spring 15 on the pillar 9 side The portion is fitted into the projection 10.

One end of the operating rod 24 penetrates the center hole of the dish-shaped half body ₂₂ and protrudes into the case body 2, and contacts the center of the movable contact assembly C so as to be able to move toward and away from it. The contact state is maintained by the elastic force of the first spring 15 at least while the first movable contact 14 is separated from the first fixed contact 13.

Next, the operation of this embodiment will be explained.

When the vehicle is not braked, the brake pedal 27 pushes the operating rod 24 to the right in FIGS. He then developed the stop lamp circuit. At this time, the second movable contact 21
is in the closed position in contact with the second fixed contact 17a to close the constant speed running control circuit and operate the control circuit.

Brake pedal 27 to apply brakes to the vehicle
When you step on the button, the operating rod 24 is pushed to the left by the elastic force of the second spring 26, and the first movable contact 14
Due to the elastic force of the first spring 15, each first fixed contact 1
3 and closes the stop lamp circuit, so the stop lamp lights up. On the other hand, the second movable contact 21 is connected to the first movable contact 14
Since the fixed contact 17a slides from the closed position on the second fixed contact 17a to the open position on the insulator 20, the constant speed running control circuit is opened. In addition, the first movable contact 1
4 comes into contact with the first fixed contact 13 and stops,
The operating rod 24 moves to follow the brake pedal 27 due to the elastic force of the second spring 26 and moves away from the movable contact assembly C.

When the brake is released, the first movable contact 14 is separated from each first fixed contact 13 as described above, and the stop lamp circuit is opened again, while the second movable contact 2
1 moves back onto the second fixed contact 17a, so the constant speed running control circuit is closed again.

C. Effects of the invention As described above, according to the invention, each pair of first and second terminals and a pair of first and second terminals are attached to a switch case having a guide portion that guides and supports an operating rod so as to be slidable in its axial direction. a pair of first fixed contacts each connected to one terminal; a closed position in which the two first fixed contacts are brought into contact with each other and electrically conductive between the two first fixed contacts; a first movable contact that can move in the axial direction in conjunction with the sliding of the operating rod between open positions that interrupt the two first fixed contacts; and a pair of first movable contacts connected to the second terminals, respectively. 2 fixed contacts, a closed position that contacts both of the second fixed contacts and conducts the two second fixed contacts with each other, and an open position that is spaced apart from the both of the second fixed contacts and disconnects the two second fixed contacts from each other. a second movable contact that can move between the positions in the axial direction in conjunction with the sliding of the operating rod, and when the first movable contact is in the closed position, the first movable contact The movement toward the operating rod is restricted by contact with the contact point, and the second
Both ends of the movable contact are slidably abutted against a pair of opposing guide surfaces formed in the switch case and extending in the axial direction, and each of the guide surfaces is such that the first movable contact each second fixed contact that contacts the second movable contact end when the contact is in the open position; and an insulator that contacts the second movable contact end when the first movable contact is in the closed position. In the switch device, the switch case is provided with a pair of guide grooves extending along the axis of the operating rod and facing each other with the axis in between, on the inner surface of the switch case. The guide grooves are formed independently from the guide surface, and both ends of the first movable contact are slidably fitted into the guide grooves, and the middle part of the second movable contact is fitted into the middle part of the first movable contact. a movable contact assembly is formed by integrally connecting the movable contact assembly, and a first spring is provided between the movable contact assembly and the switch case to spring the movable contact assembly toward the operating rod, and further One end of the operating rod facing inside the switch case is brought into contact with the movable contact assembly so as to be able to move toward and away from the operating rod, and between the operating rod and the switch case, the operating rod is connected to a movable contact. A second spring that springs toward the side away from the combined body is compressed, and a stopper means is provided between the guide portion and the operating rod to prevent the operating rod from separating from the guide portion. Even if the operating rod, which can come into contact with and separate from the movable contact assembly, falls down to some extent due to sliding play between it and the switch case guide, the tilting is directly transmitted to the movable contact assembly. In addition, the movable contact assembly is not only caused by the contact between the guide surface in the switch case and both ends of the second movable contact, but also by the contact between the guide groove and the first movable contact that are independent of the guide surface. Stable sliding guidance can be achieved by fitting both ends of the movable contact, so even if the movable contact assembly is configured separately from the operating rod, the assembly will not rotate accidentally or be operated. There is no risk of the rod axis collapsing, and as a result, the movable contact assembly and therefore the first and second
To enable a movable contact to smoothly interlock with an operating rod in a stable posture at all times without being affected by the falling or wobbling of the rod, and to surely bring the movable contact into contact with and away from the first and second fixed contacts, respectively. This allows the opening and closing operations of the two circuits connected to each fixed contact to be performed accurately at all times. Moreover, since both the first and second movable contacts can be used as part of the sliding guide/rotation prevention means for the movable contact assembly, the structure is simpler, reducing costs and improving ease of assembly. can contribute.

In addition, the second spring, which is compressed between the switch case and the operating lever, acts on the operating lever in place of the first spring even after the first movable contact contacts the first fixed contact and the movement of the movable contact assembly stops. Because it can always be energized outward,
It is possible to effectively prevent the operating rod from vibrating or rattling between it and an operating member such as a brake pedal that is operated outside the switch case, or between it and the switch case guide. Furthermore, the stopper means provided between the operating lever and the switch case guide can prevent the operating lever from slipping out of the switch case, which is constantly urged by the second spring. Moreover, the second spring is compressed between the operating rod and the switch case guide, and its spring force does not directly act on the movable contact assembly. There is no risk of it hitting unevenly and causing it to fall over or cause poor sliding.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, FIG. 2 is a sectional view taken along the line shown in FIG. 1, and FIG.
FIG. 3 is a sectional view taken along the line shown in FIG. 2, and FIG. 4 is a perspective view taken from the second view. C...Movable contact assembly, _G2 ...Guide surface, S...
...stopper means, 1...switch case, 5...
First terminal, 6... Second terminal, 7... First guide groove as a guide groove, 13... First fixed contact, 14...
1st movable contact, 15... 1st spring, 17a... 2nd fixed contact, 20... insulator, 21... 2nd movable contact, 23... threaded cylinder as guide part, 24...
Operating rod, 26...second spring.

Claims (1)

[Claims for Utility Model Registration] A switch case 1 having a guide portion 23 that guides and supports an operating rod 24 so as to be slidable in its axial direction,
each pair of first and second terminals 5, 6;
A pair of first fixed contacts 13 each connected to the terminal 5, a closed position in which both the first fixed contacts 13 are brought into contact with each other and the two first fixed contacts 13 are electrically connected to each other, and A first movable contact 14 that can move in the axial direction in conjunction with the sliding of the operating rod 24 between open positions in which the two first fixed contacts 13 are separated from each other, and the two second terminals 6 are separated from each other. a pair of second fixed contacts 17a respectively connected to the second fixed contacts 17a;
Both second fixed contacts 1 are spaced apart from the fixed contact 17a.
7a between the open positions that block each other, the operating rod 24
a second movable in the axial direction in conjunction with the sliding movement of the second
A movable contact 21 is provided, and the first movable contact 14
When the second movable contact 21 is in the closed position, its movement toward the operating rod 24 is restricted by contact with both the first fixed contacts 13, and both ends of the second movable contact 21 are connected to the switch case 1. a pair of opposing guide surfaces G ₂ formed inside and extending in the axial direction;
The respective guide surfaces G ₂ are slidably abutted on the respective second fixed contacts 17a which contact the ends of the second movable contacts 21 when the first movable contacts 14 are in the open position. , a switch device configured by arranging an insulator 20 adjacent to each other that contacts an end portion of the second movable contact 21 when the first movable contact 14 is in the closed position, A pair of guide grooves 7 extending along the axis of the operating rod 24 and facing each other with the axis in between are provided on the inner surface of each of the guide surfaces _G2.
In addition, both ends of the first movable contact 14 are slidably fitted into both guide grooves 7, and the second movable contact 21 is formed in the intermediate part of the first movable contact 14. A movable contact assembly C is constructed by integrally joining the intermediate portions of the movable contact assembly C and the switch case 1, and a movable contact assembly C is provided between the movable contact assembly C and the switch case 1, and the movable contact assembly C is moved toward the operating rod 24 side. 1 spring 15 is compressed, and one end of the operating rod 24 facing the inside of the switch case 1 is brought into contact with the movable contact assembly C so as to be able to move toward and away from the operating rod 24. A second spring 26 is provided between the case 1 and the operating rod 24 to force the operating rod 24 away from the movable contact assembly C. A switch device comprising a stopper means S capable of preventing the rod 24 from coming off the guide portion 23.