JPH06101272B2 - Stop plum switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a stop circuit that interlocks with a foot brake pedal of a vehicle or the like and that blinks a stop lamp attached to the rear part of the vehicle, such as a warning or cancel. A warning circuit that outputs a signal relates to a stop lamp switch installed in a case as an independent circuit.

(Prior Art) Conventionally, in a vehicle that requires a stop circuit and a warning circuit of this type, two switches dedicated to each circuit are separately installed, or both circuits are provided in one case, and a foot brake is provided. A stop lamp switch is installed that activates the stop circuit and the warning circuit simultaneously with the operation of the pedal.

Such a conventional stop lamp switch will be described with reference to FIGS. 9 (a) and 9 (b).

9 (a) is a side sectional view of the stop lamp switch, and FIG. 9 (b) is a bottom view seen from the direction of arrow A in FIG. 9 (a).

The stop lamp switch is a mounting shaft with a male thread 1
A plate-shaped base 3 in which two fixed terminals 2 made of plate springs each having a V-shaped sliding contact portion 2a formed on the upper part thereof are planted so as to face each other at the lower end of the The covered warning circuit switch is attached, and the stepped portion provided on the lower surface of the plate-like base 3 is used, and two fixed contacts 6 respectively connected to the external terminals 5 are provided on the lower surface.
A stop circuit switch housed in a rectangular tubular base 7 made of an insulating material and fixed to the bottom surface is fixed. A cylindrical sliding terminal 8 is fixed to the lower end of the mounting shaft 1 in the central through hole 1a, and a return spring 9 is provided on the outer periphery of the mounting shaft 1 so that an operating shaft 10 that is always biased upward can move up and down. It is installed. In the center of the plate-like base 3, a sub-actuating shaft which is always urged upward by a return spring 11 coaxially with the actuating shaft 10.
12 is mounted so that it can move up and down. An operating arm 14 for driving the leaf spring device 13 is attached to the lower end of the sub-actuating shaft 12, and drives a movable terminal 16 connected to the leaf spring device 13 and having two opposed contacts 15 fixed thereto. The opposed contact 15 is normally closed by being urged downward by the leaf spring device 13 to come into contact with the fixed contact 6 on the bottom surface of the rectangular cylindrical base 7. The above-mentioned two fixed terminals 2 form an external terminal portion 2b by projecting an L-shaped leg portion onto the lower surface of the plate-shaped base 3.

The operation of the stop lamp switch composed of the normally closed stop circuit and the normally open warning circuit will be described below. The switch is in a state where the operating shaft 10 is pushed in when it is attached to the vehicle body.

When you press the brake pedal, the working shaft 10 and the sub-working shaft 12
Rises due to the action of the two return springs 9 and 11,
First, the actuating arm 14 of the sub-actuating shaft 12 opens the leaf spring device 13, and the opposing contact 15 of the movable terminal 16 connected to the leaf spring device 13 contacts the fixed contact 6 of the rectangular cylindrical base 7 to stop the stop circuit. To the closed state. When the working shaft 10 and the sub-working shaft 12 continue to rise,
The sliding terminal 8 at the lower end of the actuating shaft 10 inserted between the two sliding contact portions 2a is separated from the sliding contact portion 2a to open the warning circuit. Furthermore, the working shaft 10 and the sub-working shaft
When 12 rises, the step portion of the actuating shaft 10 separates from the sub actuating shaft 12 and rises and stops by the action of the return spring 9 independently.

When the brake pedal is released, the return force of the pedal causes the operating shaft 10
Is pushed in, and first, the stepped portion of the sliding terminal 8 fixed to the shaft end
8a hits the head of the sub-actuation shaft 12 and pushes it down against the urging force of the return spring 11. Further, when the operating shaft 10 is pushed in, the sliding terminal 8 is inserted between the two sliding contact portions 2a of the warning circuit switch to close the warning circuit. Subsequently, when the operating shaft 10 is pushed in, the operating arm 14 of the sub-operating shaft 12 that is interlocked with this drives the leaf spring device 13 and pulls up the movable terminal 16 connected to the leaf spring device 13. When the movable terminal 16 moves upward, the counter contact 15 fixed to the movable terminal 16 separates from the fixed contact 6 fixed to the bottom surface of the rectangular cylindrical base 7, and the stop circuit is opened to open the circuit 1 End the cycle.

(Problems to be Solved by the Invention) However, when the dedicated switches are attached to the stop circuit and the warning circuit, respectively, there is a problem that a large installation space is required in the vehicle or the like. Further, in the stop lamp switch in which the stop circuit and the warning circuit are arranged in the axial direction, there are problems that the number of constituent parts is large and the assembling workability is poor, and the stop lamp switch becomes a large-sized stop lamp switch that is long in the axial direction.

Further, there is a problem in that the contact of the switch is soiled by the dust in the outside world that enters through the gap between the operating shaft and the mounting shaft as the operating shaft moves up and down, and the reliability of the switch deteriorates.

The present invention solves the above problems, and provides a small-sized stop lamp switch having a simple structure and excellent assembling workability.

(Means for Solving the Problems) In order to solve the above problems, the present invention is directed to two opposing fixed contact L-shaped fixed terminals (first fixed terminal) that form a stop circuit. Terminal) and two sliding contact type fixed terminals (second fixed terminals) of a hiragana character composed of leaf springs, which constitute a warning circuit, are arranged side by side in a plane, and further, the above-mentioned L-shape. And a base having an upper and lower movable rigid terminal urged by a first return spring and having a U-shaped movable terminal of katakana arranged below the fixed terminal so as to always contact the fixed terminal. An actuating shaft having a movable terminal arm fitted with a metal contact ring that is inserted between the actuating arm interlocking with the V-shaped movable terminal and the above-mentioned V-shaped fixed terminal, and is always biased upward by the second return spring. And fixed to the cover that fixed the above base, the above operating shaft moves up and down. And a mounting shaft having a central through hole that is freely fitted.

In addition, a seal made of a flexible film is attached between the upper part of the operating arm provided on the lower part of the operating shaft and the inner peripheral corner of the cover,
The switch part is sealed.

(Operation) According to the above configuration, the stop circuit and the warning circuit are arranged side by side in a plane at right angles to the operating axis, so that the length is short and the size is small. Moreover, the number of parts is reduced by the opposed contact type and the sliding contact type, and the assembling workability is improved.

Further, when the switch section is hermetically sealed, the contacts are not contaminated, so that the reliability is improved.

(Embodiment) A first embodiment of the present invention will be described with reference to FIGS. 1 to 5, and a second embodiment will be described with reference to FIGS. 6 to 8.

FIG. 1, FIG. 2 and FIG. 3 are a plan view, a side cross-sectional view and a plan cross-sectional view of an upper end surface of a cylindrical base of a stop lamp switch according to a first embodiment of the present invention.

In FIG. 2, the stop lamp switch has an electric contact 18 fixed to the left end of a cylindrical base 17 made of an insulating material in a bent portion at the upper end and an external terminal portion 19a at the lower end, as shown in FIG. And two rigid L-shaped fixed terminals 19 planted so as to project from the lower surface of the cylindrical base 17 on the right side,
A contact portion 20a having a dogleg shape at the upper end (shown in FIG. 5 described later),
The V-shaped fixed terminal 20 fixed at the fixing prism 21a of the spacer 21 described below, the lower end of which protrudes from the through hole of the cylindrical base 17 and serves as the external terminal portion 20b, and the L-shaped fixed terminal 19 described above. Fixing the two electrical contacts 22 facing the electrical contacts 18 of the
Of the rigid U-shaped movable terminal 24 and the above-mentioned U-shaped movable terminal 24, which are always urged upward by the return spring 23 and are vertically movable under the L-shaped fixed terminal 19. Actuating arm to push down
A movable terminal arm 10b, which is fixed with a fixing plug 26, is formed at the lower end of the metal contact ring 25 that enters between the contact portion 20a of the dogleg shaped fixed terminal 10a and the above-mentioned dogleg shaped fixed terminal 20, and is attached to the guide hole 10c. The operating shaft 10 is always urged upward by the second return spring 9, the central through hole 1a into which the above operating shaft 10 is vertically movably fitted, and the male screw 1b is cut on the outer periphery. The mounting shaft 1 and a cover 27 fixed to the lower end of the mounting shaft 1 for mounting the cylindrical base 17 on the mounting shaft 1.
And four positioning protrusions for determining the relative position of the cover 27 and the cylindrical base 17 and for providing a space on the upper surface.
21b and a spacer 21 on the lower surface of which two fixing prisms 21a for mounting the V-shaped fixed terminals 20 as described above are formed.

The first return spring 23 for urging the U-shaped movable terminal 24 is guided by the outer periphery of the annular protrusion 17a formed on the left side bottom surface of the cylindrical base 17 and the operating shaft 10 described above. The second return spring 9 that is biased to is guided by the guide hole 10c of the actuating shaft 10 and the spire-shaped projection 17b formed on the central bottom surface of the cylindrical base 17 described above.

Fig. 1 is a plan view of the stop lamp switch.
The working shaft 10 is fitted in the central through hole 1a of the mounting shaft 1 to which is fixed.

FIG. 3 is a plan sectional view taken along the upper end surface of the cylindrical base 17.
On the left side of the cylindrical base 17 having the H-shaped recess 17c, 2
L-shaped fixed terminals 19 are planted, a U-shaped movable terminal 24 is arranged under the L-shaped fixed terminals 19, and two V-shaped fixed terminals 20 are provided on the right side of the spacer 21 as fixing prisms 21a. The metal contact ring 25 fixed to the bottom surface of the H-shaped recess 17c is fitted between the contact points 20a of the movable terminal arm 10b of the operating shaft 10 and fixed by the fixing plug 26. There is. The cylindrical base 17
A cover 27 that secures this is drawn in a ring shape around the.

As described above, the operation of the stop lamp switch in which the stop circuit is normally closed and the warning circuit is normally open will be described with reference to FIGS. 4 (a) and (b) and FIG. 5 (a).
This will be described with reference to (b).

FIGS. 4 (a) and 4 (b) show a counter contact type stop circuit, and FIGS. 5 (a) and 5 (b) show a sliding contact type warning circuit. Is opposite, that is, (a) on the right side of the center line
The drawing is a half sectional view showing an operating state and the left side (b) is a normal state.

When the brake pedal is depressed, the actuating shaft 10 and the U-shaped movable terminal 24 are raised by the action of the second return spring 9 and the first return spring 23 which urge them, and first, the U-shaped movable terminal 24 When the electric contact 22 comes into contact with the electric contact 18 of the L-shaped fixed terminal 19, the stop circuit is closed, and further only the actuating shaft 10 continues to move upward, and the metal contact ring 25 of the movable terminal arm 10b has a dogleg shape. When it comes off from the contact portion 20a of the fixed terminal 20, the warning circuit is opened, and the warning circuit is opened as shown in FIG. 4 (a).
Then, the operating state shown in FIG.

When the brake pedal is released, the return force of the pedal causes the operating shaft 10
Is pushed against the urging force of the second return spring 9,
As can be seen in Fig. (A), first, the movable terminal arm 10b of the operating shaft 10
When the metal contact ring 25 fixed to the contact point 20a of the V-shaped fixed terminal 20 contacts the two V-shaped fixed terminals 20, the warning circuit is closed.

Further, as the operating shaft 10 is pushed in, the operating arm 10a of the operating shaft 10 moves in a U-shaped movable terminal 24, as can be seen from FIG. 4 (a).
When pressed continuously, the U-shaped movable terminal 24 moves downward against the first return spring 23 in conjunction with the operating shaft 10, and its electrical contact 22 opens from the electrical contact 18 of the L-shaped fixed terminal 19. Release,
The stop circuit opens. The state in which the tip of the actuating shaft 10 is pushed in until it coincides with the tip of the mounting shaft 1 is shown in FIGS. 4 (b) and 5 (b). As shown in FIG. 5 (b), The warning circuit once closed is in the closed state because the metal contact ring 25 has a width, and one cycle of opening and closing the electric path is completed.

FIG. 6 is a side sectional view of a stop lamp switch according to a second embodiment of the present invention. The second embodiment is different from the first embodiment shown in FIGS. 1 to 3 in that the positioning projection 21b on the upper portion of the spacer 21 is moved to the outer periphery to widen the upper space as a positioning ring 21c. The seal 28 made of a flexible film is housed in the space, and the inner diameter and the outer diameter of the seal 28 are pressed against the seal groove 10d provided on the upper part of the operating arm 10a provided on the lower part of the operating shaft 10 and the corner of the cover 27. This is a point of fixing the spacer 21 to the positioning ring 21c.
The seal 28 seals the switch part and prevents dust and dirt entering through the gap between the mounting shaft 1 and the operating shaft 10 from polluting the switch part, so that the reliability of the switch is further improved.

The operation of the stop lamp switch configured as described above as a switch is the same as that of the first embodiment, and the description thereof will be omitted.

7 (a) and (b) and FIGS. 8 (a) and (b),
As in the first embodiment, a right side (a) diagram shows an operating state and a left side (b) diagram shows a normal state, similarly to the first embodiment. Shown respectively.

When the brake pedal is depressed, the operating shaft 10 moves to the second return spring 9
The seal 28 is actuated by being returned by the urging force of, and the membrane of the seal 28 flexes from the S-shape to the oblique V-shape, and is freely deformed.
Seal the switch part. Release the brake pedal to return to the original state.

(Effects of the Invention) As described above, according to the present invention, the stop circuit and the warning circuit are arranged side by side in a plane, so that not only the axial length is shortened but also the structure is simple. The number of parts is reduced to about half that of the conventional example, and assembly workability is significantly improved. Further, not only does the space for mounting a vehicle etc. be small, but the mounting workability is also significantly improved.

In addition, the switch part is sealed, and the switch part is protected by dust in the air that enters through the gap between the mounting shaft and the operating shaft, or rubber-based stopper powder that is attached to the stop lamp operation part of the brake pedal on the vehicle side. Since it does not become dirty, the reliability is further improved.

[Brief description of drawings]

1, 2, and 3 are a plan view, a side sectional view, and a plan sectional view taken along the upper end surface of a cylindrical base, respectively, of a stop lamp switch according to a first embodiment of the present invention. (A), (b) and FIGS. 5 (a), (b) are side half-sectional views of the switch portion for the stop circuit and the warning circuit for explaining the operation, and FIG. FIG. 7 (a), (b) and FIG. 8 (a), (b), which is a side sectional view of the stop lamp switch of the embodiment of FIG.
FIG. 6 is a side half cross-sectional view of a switch section for a stop circuit and a warning circuit for explaining the operation thereof. 4 (a), (b), 5 (a), (b),
7 (a) and (b) and FIGS. 8 (a) and (b) are normal when the vehicle body is mounted, with the right side of the center line as (a) and the left side as (b). Each state is shown. 9 (a) and 9 (b) are a side sectional view and a bottom view of a conventional stop lamp switch, respectively. 1 ... Mounting shaft, 1a ... Center through hole, 1b ... Male screw, 2
...... Fixed terminal, 2a …… Sliding contact part, 2b, 19a, 20b …… External terminal part, 4 …… Case, 5 …… External terminal, 7 …… Square cylindrical base, 8 …… Sliding terminal , 8a ... Step, 9 ... Second return spring, 10 ... Actuating shaft, 10a, 14 ... Actuating arm, 10b ... Movable terminal arm, 10c ... Guide hole, 10d ... Seal groove, 11 ...... Return spring, 12 …… Sub-actuating shaft, 13 …… Leaf spring device, 15 …… Counter contact, 16 …… Movable terminal, 17 …… Cylindrical base, 17a …… Annular protrusion, 17b …… Spiers Protrusion, 17c ... H-shaped recess, 19 ...
… L-shaped fixed terminal, 20 …… V-shaped fixed terminal, 20a …… Contact part, 21 …… Spacer, 21a …… Fixing prism, 21b …… Positioning protrusion, 21c …… Positioning ring, 23 …… No. 1 return spring, 24 ... U-shaped movable terminal, 25 ... Metal contact ring, 26
…… Fixing plug, 27 …… Cover, 28 …… Seal.

Claims (2)

[Claims] 1. A pair of first fixed terminals made of a rigid body and two second fixed terminals made of a leaf spring are arranged in parallel, and further,
From the rigid body that is urged upward by the first return spring below the first fixed terminal and is in contact with the two first fixed terminals to bring the first fixed terminals into conduction. The movable base is placed on the base and the center through hole of the mounting shaft that is fixed to the cover that fixes the base is vertically fitted.
The actuating shaft biased upward by the second return spring, the actuating arm provided on the lower part of the actuating shaft and interlocking with the movable terminal, and the actuating arm provided on the lower part of the actuating shaft. And a movable terminal arm fixed with a metal contact ring that enters between the second fixed terminals to bring the second fixed terminal into a conductive state. 2. A switch part is hermetically sealed by mounting a seal made of a flexible film between an upper part of an actuating arm provided at a lower part of an actuating shaft and a corner part of a cover. A stop lamp switch according to the range (1).