JPS6332015Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a switch that detects the position of the parking lever.

A parking brake lever position detection switch that is fitted and fixed into a hole formed in a parking brake lever or a fixed member facing the parking lever, and is activated by a change in the operating position of the parking lever, A plastic movable member integrally comprising a cylindrical metal case with a bottom, a cylindrical part slidably fitted into the metal case, and a protruding shaft protruding from a hole at the bottom of the metal case, and the tip of the protruding shaft. and a metal stopper fixed to the parking brake lever, when the movable member is moved in response to a change in the parking brake lever position,
A parking brake lever position detection switch has been proposed in which the metal case and the metal stopper are electrically opened and closed.

However, in such a switch, since the metal case and the movable member are relatively rotatable around the axis thereof, there is a drawback that the direction in which the lead wire is drawn out from the metal stopper cannot be determined. . If the direction of the lead wire pulled out from the metal stopper is not determined, the lead wire may come into contact with a locking tooth or a pawl that locks the sector in the vicinity due to vehicle body vibration or parking lever operation. Damage to the lead wire may cause the parking lever position display device to display incorrect information.

The present invention was developed against the background of the above circumstances, and its purpose is to prevent the movable member from rotating around its axis, and to prevent the lead wire from rotating from a metal stopper fixed to the movable member. To provide a parking lever position detection switch in which the pulled out position of the parking lever is constant.

In order to achieve this purpose, the parking lever position detection switch of the present invention includes: (1) a bottomed rectangular cylindrical metal case with a through hole formed in the bottom surface; The apparatus includes a protruding shaft protruding from the metal case and a prismatic part protruding from the opening of the metal case and having a cross-sectional shape substantially the same as an internal cross-section of the metal case, so that the apparatus is movable in the axial direction. (3) a plastic movable member fitted into a metal case; (4) a metal stopper that comes into contact with the movable member to prevent it from moving beyond a predetermined distance; a compression coil spring that is inserted and biases the movable member toward the prismatic portion thereof, when the movable member is moved in accordance with a change in the position of the parking brake lever;
The metal case and the metal stopper are electrically opened and closed.

Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In FIG. 1, the sector 2 is fixed to a vehicle body (not shown), and the base end of the parking lever 4 is rotatably attached to the sector 2 by a pin 6. A locking tooth 8 is formed on an arc centered on the pin 6 in the sector 2, and when a hook (not shown) provided on the parking lever 4 engages with the locking tooth 8, the parking lever 4 is closed. The operating position of the parking brake is maintained, and the braking force of the parking brake is maintained. At the same time, by pressing the knob 10, the latch claw and the locking teeth 8 are disengaged, and the parking lever 4 is returned to the non-operating position. It is now possible to return.

A rectangular hole 12 is formed in the lower surface of the parking lever 4, and a switch 14 for detecting the operating position of the parking lever 4 is inserted and fixed in the hole 12. When the parking lever 4 is in the non-operated state, a bracket 16 is inserted from the sector 2 at a position opposite to the hole 12.
is provided in a protruding manner, and the switch 14 is actuated by coming into contact with the bracket 16.

As shown in FIGS. 2 to 4, the switch 14 includes a metal case 18 and a metal case 18.
A moving member 20 made of resin is fitted so as to be movable in the axial direction, a stopper 22 made of metal prevents the moving member 20 from moving beyond a predetermined distance, and the moving member 20 is placed in a case. Compression coil spring 24 biased in the direction of protruding from 18
It is composed of.

The case 18 is a press-molded product in the shape of a rectangular cylinder with a bottom and an insertion hole 26 formed in the bottom surface, and is provided with outwardly bent flange portions 28 on two opposite sides of the opening edge. A flange portion 2 is provided on the side wall portion of the side surface from which the flange portion 28 protrudes.
When the case 18 is fitted into the hole 12 of the parking lever 4, the periphery of the hole 12 is formed on the flange portion 2.
The case 18 is gripped between the case 8 and the claw 30 and fixed. Further, among the side wall portions of the case 18, the side wall portions on which the claws 30 are not formed are formed from bent portions 34 that are bent so that the tips 32 of the adjacent side wall portions are adjacent to each other. By forming the tip of the bent portion 34 slightly outward, wobbling between the hole 12 and the case 18 is prevented, and the tip 32 of the bent portion 38 is aligned with the periphery of the hole 12. By breaking the paint film, the case 18 and the parking lever 4 can be electrically connected easily and reliably at the same time as the case 18 is fitted.

The moving member 20 includes a protruding shaft 36 that protrudes to the outside of the case 18 through an insertion hole 26 formed in the bottom surface of the case 18, and a prismatic portion with a rectangular cross section that is fitted into the case 18 and protrudes from the opening of the case 18. 38, and the movable member 20 is connected to the prismatic portion 3 at the tip of the protruding shaft 36.
A stopper 22 that comes into contact with the bottom surface of the case 18 to prevent movement of the movable member 20 when moved toward the 8 side is fixed by a screw 40. This stopper 2
A lead wire 42 connected to a parking lever position display device (not shown) is connected to 2, and the connection between this lead wire 42 and the vehicle body is electrically opened and closed depending on the position of the moving member 20. Furthermore, case 18
A compression coil spring 24 is interposed between the bottom inner wall surface of the case 18 and the movable member 20, and the movable member 20 is always biased in the direction of protruding from the opening of the case 18.

The switch 14 configured as described above is such that when the parking lever 4 is in the non-operated state, that is, the parking lever 4 is in the lowest position, the movable member 20 resists the biasing force of the compression coil spring 24. Since it is pushed up by the bracket 16, the stopper 22 is separated from the bottom surface of the case 18, and the gap between the lead wire 42 and the vehicle body is electrically opened. FIG. 1 shows this state.

Next, when the parking lever 4 is operated in the direction in which it is pulled up, the switch 14 and the bracket 1
6 are separated from each other, the movable member 20 is moved according to the biasing force of the compression coil spring 24 until the stopper 22 comes into contact with the bottom surface of the case 18,
The lead wire 42 and the vehicle body are electrically closed.

In the above operation, since the prismatic portion 38 is fitted into the prismatic cylindrical case 18 having an internal cross-section substantially similar to the cross-sectional shape of the prismatic portion 38, the movable member 20 is axially aligned with respect to the case 18. Rotation of the surroundings is prevented, and twisting of the lead wire 42 connected to the stopper 22 does not occur. As a result, the pull-out position of the lead wire 42 is specified by the case 18, so there is no need for any fixing device for the lead wire 42, and vibrations of the vehicle body can be prevented.
This prevents the lead wire 42 from coming into contact with the locking teeth 8, latch claws, etc. of the sector 2 and being damaged due to this operation.

Here, the cross-sectional shape of the prismatic portion 38 and the case 18 into which it is fitted is not limited to a quadrangle, but may be a polygon such as a hexagon.

As detailed above, according to the parking lever position detection switch of the present invention, the pull-out position of the lead wire is specified, thereby preventing the lead wire from coming into contact with locking teeth, latch claws, etc. and being damaged. This has the effect of eliminating the erroneous display on the parking lever position display device caused by the damage.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a parking brake operating device including an embodiment of the present invention. 2 to 4 are a perspective view, a vertical sectional view, and a bottom view showing the embodiment of FIG. 1. FIG. 4... Parking lever, 12... Hole, 14...
...Switch (parking lever position detection switch), 18...Case, 20...Moving member, 22
...stopper, 24...compression coil spring,
36...Protruding shaft, 38...Prismatic portion.

Claims (1)

[Claims for Utility Model Registration] A parking brake lever that is fitted and fixed into a hole formed in a parking lever or a fixed member facing the parking lever, and is actuated by a change in the operating position of the parking lever. A position detection switch, comprising: a bottomed rectangular cylindrical metal case with a through hole formed in the bottom; a protruding shaft protruding from the metal case through the through hole; and a protruding shaft extending from the opening of the metal case. a plastic moving member that is fitted into the metal case so as to be movable in the axial direction, and includes a prism portion that protrudes and has a cross-sectional shape substantially the same as the internal cross-section of the metal case; and the protruding shaft. a metal that is fixedly attached to the end of the metal case and comes into contact with the bottom surface of the metal case when the movable member is moved toward the prismatic portion thereof to prevent the movable member from moving beyond a predetermined distance. a compression coil spring that is inserted between the oppositely facing prismatic portion of the movable member and the bottom inner wall surface of the metal case and biases the movable member toward the prismatic portion; The parking brake lever position is characterized in that when the movable member is moved in accordance with a change in the operating position of the parking brake lever, a gap between the metal case and the metal stopper is electrically opened and closed. Detection switch.