JPH06101273B2 - 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 to 12.

9 and 10 are a combination of both circuits in the axial direction. FIG. 9 is a sectional view thereof, and FIG. 10 is an arrow A in FIG.
It is a bottom view seen from the direction.

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 further, using the stepped portion provided on the lower surface of the plate-like base 3, two fixed contacts 6 respectively connected to the external terminals 5 are provided on the bottom surface on the bottom surface. A stop circuit switch housed in a rectangular cylindrical base 7 made of a fixed insulator is fixed. A cylindrical sliding terminal 8 is provided at the lower end of the center through hole 1a of the mounting shaft 1 described above.
Is fixed, a return spring 9 is provided on the outer periphery, and an operating shaft 10 which is always biased upward is mounted so as to be vertically movable. At the center of the plate-like base 3, a sub-actuating shaft 12 which is always urged upward by a return spring 11 is provided coaxially with the actuating shaft 10.
It is mounted so that it can move up and down. At the lower end of the sub-operation shaft 12,
An operating arm 14 for driving the leaf spring device 13 is attached to drive 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 closed warning circuit will be described below.

When you step on the brake pedal and push in the operating shaft 10,
First, the step portion 8a of the sliding terminal 8 fixed to the shaft end is
It hits against the head of and is pushed down against the biasing 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. Then, when the operating shaft 10 is pushed in, the operating arm 14 of the sub-operating shaft 12 that interlocks with this drives the leaf spring device 13 to move the leaf spring device.
Pull up the movable terminal 16 connected to 13. When the movable terminal 16 moves upward, the counter contact 15 fixed to the movable terminal 16 is separated from the fixed contact 6 fixed to the bottom surface of the rectangular cylindrical base 7, and the stop circuit is opened.

When the brake pedal is released, 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 two sliding terminals 8 at the lower end of the operating shaft 10 inserted between the sliding contact portions 2a are separated from the sliding contact portions 2a to open the warning circuit. In addition, the operating shaft 10
When 12 rises, the stepped portion of the actuating shaft 10 separates from the sub actuating shaft 12 and returns to its original position by the action of the return spring 9 to complete one cycle of the circuit opening and closing.

Next, referring to FIG. 11 and FIG. 12, a stop lamp switch in which a stop circuit and a warning circuit are juxtaposed on a plane perpendicular to the operating axis will be described.

FIG. 11 is a side sectional view of the stop lamp switch, and FIG. 12 is a bottom view seen from the direction of arrow A shown in FIG.
The stop lamp switch is a rectangular tubular base provided with two connecting pieces 17 to which fixed downward facing contacts 6 are fixed and two connecting pieces 18 not shown in the figure, which form opposed sliding contacts. From the rigid body, which is fixed to the base 7 and the fixed contact 6 under the fixed contact 6, has two facing downward facing contacts 15 and is urged upward by the return spring 19 to come into contact with the fixed contact 6 to be in a normally closed state. The movable terminal 16 and the rectangular cylindrical base 7 are fixed to a cover 21 fixed via a spacer 20, and a mounting shaft 1 having an externally threaded outer periphery, and a central through hole 1a of the mounting shaft 1 are vertically moved. A sliding terminal (not shown), which is fitted movably and is inserted between the above two sliding contacts at the lower end to conduct the two contacts, is always urged upward by a return spring 9. And the operating shaft 10.

As shown in FIG. 11, the above-mentioned two pairs of connecting pieces 17 and 18 are provided.
Are respectively connected to the external terminals 5 on the lower surface of the rectangular cylindrical base 7.

The operation of the stop lamp switch composed of the normally closed stop circuit and the normally open warning circuit will be described below.

When the brake pedal is depressed and the operating shaft 10 is pushed in against the urging force of the return spring 9, a sliding terminal (not shown) mounted on the lower end of the operating shaft 10 has two sliding contacts (not shown). )) And conducts it to close the warning circuit. When the operating shaft 10 is pushed in continuously, the lower end of the operating shaft 10 contacts the movable terminal 16, and thereafter the movable terminal 16 descends in conjunction with the operating shaft 10. When the movable terminal 16 is lowered, the counter contact 15 fixed to the movable terminal 16 is separated from the fixed contact 6, and the stop circuit is opened.

When the brake pedal is released, the actuating shaft 10 and the movable terminal 16 are raised by the action of the return springs 9 and 19, first the stop circuit is closed, then the warning circuit is opened, and the actuating shaft 10 Is pressed by the return spring 9 and returns to its original position, completing one cycle of opening and closing the electric path.

(Problems to be Solved by the Invention) However, such a structure has a problem that the structure is complicated, the number of constituent parts is large, and the assembling workability is poor. Also, those stacked in the axial direction are long, and those stacked side by side have a wide width, both of which are large stop lamp switches, so not only a large space for mounting them on the vehicle etc. is required, but also There was also a problem that mounting workability was poor.

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 and highly reliable stop lamp switch having a simple structure, a small number of parts, and excellent assembly workability and installation workability.

(Means for Solving Problems) In order to solve the above problems, the present invention has four L-shaped members each having a rigid body in which a downward contact point and an upward contact point are fixed to a bent portion at the upper end. The fixed terminals are planted in such a manner that the contact directions are alternated, and the L-shaped fixed terminals are normally urged upward by a return spring below the L-shaped fixed terminals having the downward contacts. The outer periphery fixed to the cylindrical base for arranging the U-shaped movable terminal made of a rigid body that makes contact with the downward contact of the above and conducts it to make it the normally closed state, and the cover for fixing this cylindrical base. It is vertically movably fitted in the central through hole of the mounting shaft with a male thread cut on it, and is vertically movably fitted to the operating shaft that is urged upward by the return spring and downwardly by the contact pressure spring. It is biased by the A rigid plate-shaped movable terminal which is in a normally open state in a normal state and which opposes a contact point of an L-shaped fixed terminal having a contact point, and which houses the contact pressure spring, the cover and the tubular base. And a spacer that determines the relative position of the table.

Further, inside the cover, a seal made of a flexible film is mounted between the seal groove of the operating shaft and the corner of the cover to seal the switch part.

(Operation) With this configuration, the movable terminals in the normally closed state from below and the movable terminals in the normally open state from below are arranged above and below the four fixed terminals arranged on one plane. In addition, since each structure is opened and closed in conjunction with the operating shaft, the structure is simple, the number of parts is small, and the small-sized stop lamp switch is excellent in assembling workability.

Further, in the structure in which the switch portion is sealed by the seal, dirt entering through the gap between the mounting shaft and the operating shaft cannot reach the switch portion, so that the reliability is further improved.

(Embodiment) A first embodiment of the present invention will be described with reference to FIGS. 1 to 4, and a second embodiment will be described with reference to FIGS. 5 to 8.

FIG. 4 is an exploded perspective view of the stop lamp switch according to the first embodiment of the present invention, which is drawn in order from the top in the axial direction.

The mounting shaft 1 is provided with a central through hole 1a at the center, a male screw 1b on the outer periphery, and a cylindrical portion 1c at the lower end for fixing the next cover 21 by caulking. Cover 21
Is made of sheet metal, and has a through hole 21a in the center into which the cylindrical portion 1c of the mounting shaft 1 fits, and four positioning protrusions 21b at the lower end of the outer periphery.
Are formed. The spacer 22 is made of an insulating material, has an outer diameter equal to the inner diameter of the cover 21, and has a circular recess 22 for accommodating the caulked cylindrical portion 1c of the mounting shaft 1 on the upper surface.
a is a through hole 22b in the center, and the next contact pressure spring is on the inner surface.
A cylindrical hole 22c for housing 23 is formed, and a positioning key portion 22d is formed at the lower end of the outer diameter cylindrical portion. The contact pressure spring 23 is a compression coil spring. The plate-shaped movable terminal 24 has a through hole 24a through which the following working shaft 10 is vertically movably inserted.
However, through small holes 24b through which the shaft portions 25a of the next electrical contacts 25 are inserted are formed at both ends. The electrical contact 25 is formed with a shaft portion 25a that is crimped after being fitted into the through small hole 24b of the plate-shaped movable terminal 24 described above. As shown in the drawing, the plate-shaped movable terminal 24 is inserted from below to form a downward contact. The operating shaft 10 is made of an insulating material, and the lower end has a stepped portion 10a to which the above-mentioned plate-like movable terminal 24 is closely attached, the center of which is a cylindrical hole 10b for accommodating the next return spring 9 from below, and the periphery of the cylindrical hole 10b. The conical seats 10c are formed in each of them. Return spring 9
Is a compression coil spring. L-shaped fixed terminal for normally open circuit 26
The L-shaped fixed terminal 27 for the normally closed circuit has a through small hole 26a through which the shaft portion 25a of the electrical contact 25 is inserted in the upper end bent portion and
27a are provided, and the electric contacts 25 drawn above and below each are fixed by caulking to form an upward contact and a downward contact, respectively. In addition,
The lower end portions of both are external terminal portions 26b and 27b. The rigid U-shaped movable terminal 28 has a through hole 28a through which the return spring 9 for urging the actuating shaft 10 is inserted, a guide seat 28 having a conical recessed portion around the through hole 28a, and electric powers on both wings. Through hole for contact 25
28c are formed respectively. The electrical contact 25 is inserted from above and constitutes an upward contact. Return spring 19
Is a compression coil spring that biases the U-shaped movable terminal 28 upward and is arranged in the next cylindrical base 29. The cylindrical base 29 is formed with an I-shaped recess 29a, and the L-shaped fixed terminal 26 for a normally open circuit is provided at the center thereof in the external terminal portion 26b.
, And the L-shaped fixed terminals 27 for a normally closed circuit are planted at both ends thereof so that the surfaces of the external terminal portions 27b are diagonally opposed to each other. Seat
29b and 29c are formed. Further, the guide groove 29d into which the positioning protrusion 21b of the cover 21 is fitted around the circumference thereof,
Key grooves 29e into which the key portions 22d of the spacers 22 are fitted are formed on the outer circumferences of the legs, respectively.

FIG. 3 is a layout view of two types of L-shaped fixed terminals 26 and 27 planted in a cylindrical base 29 (not shown), as viewed from below, that is, from the U-shaped movable terminal 28 side. It is a bottom view.

To assemble the stop lamp switch composed of the above-described components, the cylindrical portion 1c of the mounting shaft 1 is fitted into the through hole 21a of the cover 21, and is fixed by caulking from the inside. Next, through small holes 24b, 28c, 26a and 27a of the plate-shaped movable terminal 24, the U-shaped movable terminal 28, the L-shaped fixed terminal 26 for the normally open circuit and the L-shaped fixed terminal 27 for the normally closed circuit, respectively. The shaft 25a of the electrical contact 25
Fit and crimp the shaft end to secure. Next, after inserting the return spring 19 and the U-shaped movable terminal 28 into the I-shaped recess 29a of the tubular base 29, the L-shaped fixed terminal 27 for the normally closed circuit is inserted.
Are planted until they hit the receiving seats 29c provided on both sides of the I-shaped recess 29a diagonally. At this time, the upward electric contact 25 of the U-shaped movable terminal 28 is urged by the return spring 19 and comes into contact with the downward electric contact 25 of the L-shaped fixed terminal 27 for the normally closed circuit. Subsequently, the L-shaped fixed terminals 26 for the normally open circuit are planted so as to contact the receiving seats 29b provided on both sides of the center of the I-shaped recess 29a of the tubular base 29. Next, the plate-shaped movable terminal 24 is fitted from the upper end of the operating shaft 10 with the electric contact 25 facing downward, the contact pressure spring 23 is dropped from above, and then the spacer 22 is fitted. The return spring 9 is inserted into the cylindrical hole 10b. In this state, the contact pressure spring 23
It is in a state of being housed in the cylindrical hole 22c. Next, the combination of these is held by holding the operating shaft 10 and the key portion 22d of the spacer 22.
While aligning with the keyway 29e of the tubular base 29,
On top of. Finally, the cover to which the mounting shaft 1 is fixed
21. First, insert the working shaft 10 into the center through hole 1a of the mounting shaft 1, then fit the inner diameter of the cover 21 into the outer diameter of the spacer 22, and further adjust the position of the positioning protrusion 21b of the cover 21 to the cylindrical base. When the cover 21 is pushed in while aligning with the guide groove 29d of the base 29 and the cover 21 is fixed to the tubular base 29, the assembly of the stop lamp switch is completed.

1 and 2 show a U-shaped movable terminal 28 forming a normally closed circuit and a plate-shaped movable terminal forming a normally closed circuit, respectively.
FIG. 24 is a side sectional view of the stop lamp switch cut along a vertical plane in the axial direction of 24, and the right side (hereinafter referred to as A side) with the center line as a boundary indicates the completed assembly, that is, the normal state, and the left side (hereinafter referred to as B side) Indicates the operating state.

The structure of the stop lamp switch will be described with respect to the A side in FIG. 1 and the A side in FIG. 2, and two electric contacts 25 are fixed to the cylindrical base 29 made of an insulating material downward and upward, respectively. The normally closed circuit L-shaped fixed terminal 27 and the two normally open circuit L-shaped fixed terminals 26 project their external terminal portions 27b and 26b below the cylindrical base 29, respectively. Moreover, the electrical contact 25 is an L-shaped fixed terminal 27 for a normally closed circuit.
Is downward, and the L-shaped fixed terminal 26 for a normally open circuit arranged so as to be orthogonal to this is upward.

On the A side in FIG. 1, the U-shaped movable terminal 28 having the electric contact 25 fixed upward is moved upward by the return spring 19 inserted between the U-shaped recess 29a of the cylindrical base 29 and the bottom surface of the recess 29a. The two normally closed circuit L-shaped fixed terminals 27 are closed by urging the electric contacts 25 into contact with the downwardly directed electric contacts 25 of the normally closed circuit L-shaped fixed terminal 27. It is in a state.

The mounting shaft 1 fixed to the cover 21 on the A side in FIG.
In the center through hole 1a, an operating shaft 10 biased upward by a return spring 9 housed in a cylindrical hole 10b is vertically movably fitted. The spacer 22 housed in the cover 21 determines the relational position between the cylindrical base 29 and the mounting shaft 1, and also a contact pressure spring for urging the plate-shaped movable terminal 24 fitted to the lower end of the operating shaft 10 downward. 23 is housed in the cylindrical hole 22c.
The relative upper limit position between the mounting shaft 1 and the operating shaft 10 fitted in the central through hole 1a is determined by the mounting surface of the step portion 10a of the operating shaft 10 and the end surface of the cylindrical step portion 22d of the spacer 22. It is regulated by a plate-shaped movable terminal 24 inserted between them. The contact pressure spring 23 housed in the cylindrical hole 22c of the spacer 22 is compressed by the return spring 9 and urges the plate-like movable terminal 24 at the lower end of the contact pressure spring 23 to lower the lower end portion of the operating shaft 10. Step 10a
Are pressed against. It should be noted that guide grooves 22e are formed on the inner circumference of the spacer 22 symmetrically on the diametric line, and both blade ends of the plate-like movable terminal 24 are fitted into the guide grooves 22e so that the direction does not change during the opening / closing operation of the switch. It has become. The electrical contact 25 of the plate-shaped movable terminal 24 is an L-shaped fixed terminal 26 for a normally open circuit.
It faces the electrical contact 25 at a predetermined distance and is in a normally open state.

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. 1 and 2.

When the brake pedal is depressed and the operating shaft 10 is pushed in against the urging force of the return spring 9, the plate-shaped movable terminal 24 urged by the contact pressure spring 23 as shown on the B side in FIG. Is lowered together with the actuating shaft 10 by the restoring force of the spring, and its electric contact 25 is brought into contact with the electric contacts 25 of the two L-shaped fixed terminals 26 for the normally open circuit, which are opposed thereto, to bring them into conduction. To do. Therefore, the warning circuit is closed. Then, when the operating shaft 10 is pushed in, its step 10a
Separates from the plate-shaped movable terminal 24 and continues to descend independently against the urging force of the return spring 9, and the conical seat 10c at the tip thereof fits into the guide seat 28b of the U-shaped movable terminal 28.

As shown on the B side in FIG. 1, when the operating shaft 10 is subsequently pushed in, the U-shaped movable terminal 28 interlocks with this and descends against the urging force of the return spring 19, and the The electric contact 25 of the U-shaped movable terminal 28, which was in contact with the electric contact 25 of the L-shaped fixed terminal 27 for closed circuit, is opened and opened. Therefore, the stop circuit that was in the normally closed state becomes the open state.
Then, as shown in the B side of FIG. 1 and the B side of FIG. 2, the warning circuit stops the closed state until the working shaft 10 and the mounting shaft 1 are pushed in until they are flush with each other. The circuit remains open.

When the brake pedal is released, the actuating shaft 10 and the U-shaped movable terminal 28 ascend by the action of the respective return springs 9 and 19, and the U-shaped movable terminal 28 first becomes the L-shaped fixed terminal 27 for the normally closed circuit. Abut and close the stop circuit. When it continues to rise, the stepped portion 10a hits the plate-shaped movable terminal 24 and pushes up the plate-shaped movable terminal 24 against the urging force of the contact pressure spring 23, and for the normally open circuit that was in the closed state until then. The terminal is separated from the L-shaped fixed terminal 26, the warning circuit is opened, the position is returned to the A side in FIG. 1 and the A side in FIG. 2, and one cycle of the circuit opening and closing is completed.

Next, a second embodiment according to the present invention will be described with reference to FIGS.

The difference between the second embodiment and the first embodiment is that the operating shaft
A seal is attached between the spacer 10 and the spacer 22 to seal the switch part. This difference will be explained first.
The description of the same switch unit as that of the embodiment will be omitted.

FIG. 8 is an exploded perspective view of a stop lamp switch according to a second embodiment of the present invention, in which a seal 30 is formed on the inner and outer circumferences of a flexible membrane portion 30a having a V-shaped cross section, and an inner diameter side annular portion 30b and an outer portion, respectively. The radial side annular portion 30c is formed. Spacer 22
Is the same as that shown in FIG. 4, except that the upper portion is extended into a cylindrical shape and a cylindrical seal accommodating portion 22f and a seal groove 22g are formed on the outer diameter surface of the upper end portion. A seal groove 10d is additionally formed in the intermediate portion of the outer diameter surface of the operating shaft 10.

It should be noted that the length of the cover 21 and the length of the operating shaft 10 are added only by the dimension in which the seal 30 is mounted.

The procedure of assembling such parts is different from that of the first embodiment in that the plate-shaped movable terminal 24, the contact pressure spring 23, and the spacer 22 are sequentially fitted to the operating shaft 10 and then the ring-shaped inner side of the seal 30. As the portion 30b is pushed and expanded, it is fitted from the upper end of the operating shaft 10 and dropped into the intermediate seal groove 10d. Next, the outer diameter side annular portion 30c of the seal 30 is fitted into the seal groove 22g of the spacer 22, and the return spring 9 is inserted into the cylindrical hole 10b from the lower end with the seal 30 fixed.

The other assembly procedure is the same as that of the first embodiment.

Next, referring to the side A in FIG. 5 and the side A in FIG. 6, the structure of the stop lamp switch after the assembly is completed will be described. However, the switch portion is the same as that in the first embodiment, and the description thereof is omitted. Only the parts will be described.

As shown on the A side in FIG. 5 and the A side in FIG. 6, the seal
The inner diameter side ring-shaped portion 30b is fitted in the seal groove 10d of the actuating shaft 10, and the outer diameter side ring-shaped portion 30c is fitted in the seal groove 22g of the spacer 22. It is housed in the part 22f and seals the switch part.

Next, the operation of the seal 30 will be described with reference to the B side in FIG. 5 and the B side in FIG. Step on the brake pedal,
When the operating shaft 10 is pushed in, the inner diameter side ring-shaped portion 30b fitted in the seal groove 10d descends together with the operating shaft 10.
Although the flexible membrane portion 30a freely changes from a V-shaped cross-section to a ball-like shape, the state in which the switch portion is sealed is maintained as it is.

(Effects of the Invention) As described above, according to the present invention, the fixed terminals for the stop circuit and the warning circuit are alternately arranged and the constituent parts are arranged so as to be sequentially stacked. The number of components is about half that of conventional products, and a compact stop lamp switch can be obtained.

Further, the space for mounting a vehicle or the like can be reduced, and the mounting workability is improved. In addition, since the switch part is sealed with a seal, dust that enters through the gap between the mounting shaft and the operating shaft and the powder of the rubber-based stopper that is mounted on the stop lamp operation part of the brake pedal on the vehicle side are included in the switch part. Since it does not reach and the switch part does not get dirty, the reliability is further improved.

[Brief description of drawings]

1 and 2 are side cross-sectional views of a stop circuit portion and a warning circuit portion of a stop lamp switch according to a first embodiment of the present invention, respectively, in which the A side of the center line is in a normal state and the B side is in an operating state. Indicates. FIG. 3 is a layout view of the fixed terminals of the stop circuit and the warning circuit, a bottom view of the upper end bent portion thereof is looked up, and FIG. 4 is an exploded perspective view of the first embodiment. 5 and 6 are side cross-sectional views of the stop circuit portion and the warning circuit portion of the stop lamp switch according to the second embodiment of the present invention, in which the A side of the center line is in the normal state and the B side is in the operating state. Indicates. FIG. 7 is the same as FIG. 3 of the first embodiment. FIG. 8 is a perspective view of an exploded part of the second embodiment. 9 and 10 are a side sectional view and a bottom view of a conventional stop lamp switch in which a switch for a warning circuit and a switch for a stop circuit are axially connected, and FIGS. 11 and 12 are for a warning circuit and a stop circuit. It is a side sectional view and a bottom view of a conventional stop lamp switch in which fixed terminals for use are arranged in a plane. 1 ... Mounting shaft, 1a ... Center through hole, 1b ... Male screw, 2
...... Fixed terminal, 2a ...... Sliding contact part, 2b, 26b, 27b ...... External terminal part, 3 ...... Plate base, 4 ...... Case, 5 ...... External terminal, 6 ...... Fixed contact, 7 ...... Square tubular base, 8 ...... Sliding terminal, 8a, 10a ...... Step, 9,11,19 ...... Return spring, 10 ......
Actuating shaft, 10b, 22c ... Cylindrical hole, 10c ... Conical seat, 10d, 22g
...... Seal groove, 12 ...... Sub-actuating shaft, 13 ...... Leaf spring device, 14
...... Actuating arm, 15 ...... Counter contact, 16 ...... Movable terminal, 17,18
...... Connecting piece, 20,22 …… Spacer, 21 …… Cover, 21a, 2
2b, 24a, 28a …… through hole, 21b …… positioning protrusion, 22d ……
Key part, 22f …… Seal accommodating part, 23 …… Contact pressure spring, 2
4 …… Plate-shaped movable terminal, 24b, 26a, 27a, 28c …… Small through hole, 25
...... Electric contact, 25a ...... Shaft, 26 ...... L-shaped fixed terminal for normally open circuit, 27 ...... L-shaped fixed terminal for normally closed circuit, 28 ...... U-shaped movable terminal, 28b ...... Guide Seat, 29 ... Cylindrical base, 29a ...
… I-shaped recesses, 29b, 29c… Receiving seat, 29d… Guide groove, 29
e …… Key groove, 30 …… Seal, 30a …… Membrane, 30b …… Inner diameter side ring-shaped part, 30c …… Outside diameter side ring-shaped part.

Claims (2)

[Claims] 1. An L-shaped fixing in which four L-shaped fixed terminals made of a rigid body are planted so that the electric contacts fixed to the terminals are alternately directed downward and upward, and the downward electric contacts are fixed. Below the terminal, always urged upward by a return spring,
A cylindrical base on which a U-shaped movable terminal made of a rigid body, to which the upward electric contact is fixed, is movably arranged vertically so that the fixed electric contact comes into contact with the downward electric contact, and the cylindrical base. Fixed to the cover fixed through the spacer,
A mounting shaft having a male thread cut on the outer periphery, a working shaft vertically movably fitted in a central through hole of the mounting shaft, and constantly urged upward by a return spring housed in a cylindrical hole formed in the center; Of the contact pressure spring housed in the spacer of FIG. 4 is always urged downward, and is vertically mounted on the operating shaft so as to come into contact with the lower end step portion of the operating shaft, and the fixed electric contact is the L-shaped fixed terminal. And a plate-shaped movable terminal made of a rigid body facing each other, and a stop lamp switch. 2. A stop according to claim 1, wherein a seal mounted between the actuating shaft and the spacer is housed in a space provided at an upper end of the spacer to seal the switch part. Lamp switch.