JP2000222965A - Automatic reset mechanism for switch of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly operate a mechanism while rationalizing the switch operation by detecting completion of the operation, detecting the operation opposite to a described operation, and resetting the operating position to the condition before the operation or a predetermined operating position. SOLUTION: When an accelerator or a clutch is operated, an operating arm 33b of a locker 33 is drawn through a driving shaft and a coupling shaft. With this operation, a locking claw 37 of a support arm 33a of the locker 33 is removed from a claw part 36 of a tip of a lock arm 31c of a locker arm 31, and the locker arm 31 is displaced counterclockwise by the biasing force of a tensile spring 35, and an angled part projected equal to an angle part 25b is moved backward from a stepped surface 25 in the lock arm 31c, and a stepping arm 18 is moved to a valley part 25c at a central part of the stepped surface 25, and operating position is automatically reset to positions of EXH BRAKE ON, RETARDER OFF.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic switch return mechanism for a vehicle, in which a switch operation of electrical components in the vehicle is rationalized and a smooth mechanism can be operated.

[0002]

2. Description of the Related Art In recent years, electronic control of various mechanisms including a vehicle, that is, an engine of an automobile has been advanced, and various electric components have been mounted, and handling operations have become complicated. For example, vehicles such as trucks, buses, and various work vehicles are no exception, and the size and weight of the vehicles are increasing at the same time, and brake performance is improved for safety. However, the service brakes are still overburdened, and friction materials such as drum brake linings and disc brake pads are severely consumed, and there are problems such as vapor lock. Brakes have been adopted. Such auxiliary brakes include exhaust brakes, enhanced engine brakes, retarders, and the like. Of these, the retarder main body is normally configured to be operated by a combination switch provided on a steering wheel column of a driver's seat, and has a configuration that can be used by a driver as necessary. In general, the retarder is automatically released when an accelerator pedal, a clutch pedal is depressed, or a neutral shift is performed.

[0003]

However, the provision of the auxiliary brake function, on the contrary, reduces the engine output, slows down the response, deteriorates the fuel consumption rate, and further complicates the mechanism, and consequently the operation. That it introduces complexity.
There are difficulties. SUMMARY OF THE INVENTION The present invention has been proposed to solve such a problem, and is a switch for a combination switch, which is provided near a steering wheel and which can perform intensive operations of various mechanisms of a vehicle, particularly for a switch operation of electric components in a vehicle. It is an object of the present invention to provide an automatic switch return mechanism in a vehicle that has a rational operation and enables smooth operation of the mechanism.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a switch for operating an electric component provided in a vehicle, comprising a plurality of contacts for switching and executing a plurality of operations. Operating means for switching the electrical connection of the contacts, operating the contacts by the operating means to execute the selected operation, and confirming that the operation has been completed during the execution of the operation. A means for detecting, or a means for detecting that the operation state is in opposition to the operation thereof, by the detection signal of these detection means, to return the operation position to the state before the operation,
Automatic operation response means for returning to a specific operation position is provided. In the configuration described above, the switch is a turn signal switch in a vehicle that is held near the steering wheel through the steering shaft,
This switch has an operation lever for operating a predetermined direction indicator light provided at a predetermined position of the vehicle, operates a steering wheel by operating a contact to the left or right to indicate a direction, and operates a steering wheel, After turning, a return means is provided for automatically returning the contact point to the OFF position via the steering shaft by a return operation of the steering wheel. Further, the switch is a combination switch in which various switches are mainly combined based on a turn signal in a vehicle which is inserted in a steering shaft and held near a steering wheel. The auxiliary brake switching mechanism includes an OFF position in which the auxiliary brake is not operated by the operation lever, a first position in which the exhaust brake is operated, and a second position in which the retarder is operated together with the exhaust brake. An auxiliary brake changeover switch configured to switch between the second position and the second position. , It provided a return means for automatically returning the auxiliary brake changeover switch in the first position. Further, the auxiliary brake switching mechanism includes a swingable swingably held by an operating lever, and an auxiliary brake changeover switch that is swingably linked with the displacement of the swinging lever. An interlocking arm operatively engaged with the operation member of the changeover switch, and a pivoting arm that swings and regulates this pivoting operation, wherein the pivoting arm in the pivoting lever has an urging means at a tip. As a configuration for holding the rolling member through the rolling member, the articulating arm is movably pressed against the stepped surface formed on the edge of the housing via the rolling member by the urging force of the urging means. On the other hand, when the auxiliary brake changeover switch is switched to the second position by the operating lever, the auxiliary brake changeover switch is held in the second position via the joint arm by interlocking displacement by the articulating arm. ,
A resetting means for automatically returning the auxiliary brake changeover switch to the first position via the articulating arm, wherein the stepped surface is turned off via the swing lever by an operating lever; A valley and a crest that hold the articulating arm via a roller at the tip so as to be in a position. The return arm has a rocker arm rotatably mounted thereon and a rocker, and the rocker arm has an attached arm. An urging arm that is urged to rotate in one direction by urging means; and a locking arm that abuts and locks on the rocker by a urging force. Make contact with the rocker arm And an operating arm protruding in a direction deviating from the supporting arm, and an auxiliary brake changeover switch is operated by an operating lever under the urging of the urging means. When brought to the position, the articulating arm pushes the urging arm of the rocker arm to displace the locking arm, and locks the locking arm tip of the rocker arm to the supporting arm of the rocker,
The locking arm is made to protrude in the shape of a ridge equivalent to the ridge on the step surface, and the portion projecting in the ridge is passed through the articulating arm, and the auxiliary brake changeover switch is turned through the articulating arm. The second arm is held at the second position, a driving means is connected to the operating arm of the rocker, and the driving means is activated by an accelerator or a clutch operation, whereby the operating arm of the rocker is pulled in and actuated. The support arm of the rocker is detached from the tip of the stop arm, the rocker arm is returned and displaced by the urging force of the urging means, and the crest-shaped portion of the locking arm protruding equivalent to the crest of the step surface is removed. The auxiliary brake changeover switch is automatically returned to the first position by retreating and bringing the articulating arm to the center valley on the step surface.

[0005]

Next, an embodiment of an automatic switch return mechanism in a vehicle according to the present invention will be described.
This will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show a combination switch 1 in a vehicle such as a truck, a bus, and various work vehicles. The combination switch 1 is held near a steering wheel (not shown) at an upper end of a steering shaft (not shown). The combination switch 1 has a substantially U-shaped space 3 for entering the steering shaft in the center of the housing 2. Provided. This case 2
On the other hand, a component (to be described later) containing a large number of contacts, other mechanical components (to be described later), and the like are mounted. Have been established. The one operation lever 4 is for driving functions such as EXH (exhaust brake) & retarder, wiper, washer, hazard, into time, etc. In the case of EXH & retarder and hazard, the operation lever 4 is respectively operated. The operation is performed in a specific direction and stroke, and a symbol mark of an auxiliary brake and a scale for displaying an operation position, which will be described later, are provided in the middle of the lever. The wiper, washer, int time and the like are operated by operating a rotary operation knob 5, a rotation changeover switch 6, and a push button 7 provided at the end of the lever. The other operation lever (not shown)
Is equipped with switches for driving functions such as turn, lane change, cornering, dimmer & passing, lighting, auto cruise, and fog. It is needless to say that the combinations and functions of the respective switches described above are merely examples.

An EXH & retarder function as an auxiliary brake in the combination switch 1 will be described. In order to start the EXH & retarder function as an auxiliary brake, an auxiliary brake switching mechanism 10 is mounted on the housing 2. This auxiliary brake switching mechanism 1
The components that make up the “0” are disposed on a half-side of the substantially U-shaped space 3 of the housing 2. Such components are disposed between bearing plates 12 attached to a plurality of spacer shafts 11a, 11b, 11c of the same height protruding from the housing 2. Some parts are housed in the housing 2 as described later. That is, the auxiliary brake switching mechanism 10 includes a swing lever that is swingably held by the operation lever 4, that is, an EXH main lever 13 and an EXH main lever 13.
An EXH / RET (exhaust, retarder) switch 14 (hereinafter referred to as an E / R switch 14) that is interlocked with the displacement of the main lever 13 is provided.

The EXH main lever 13 has a hook-shaped EX attached to the vicinity of the side surface of the housing 2 and to the top of the spacer shaft 11b.
The E / R switch 14 is held swingably between the H bearing plate 15 and a swing center shaft 16.
Interlocking arm 17 that engages with an operation member (described later)
And a return means (described later) having a function of automatically returning to the predetermined operation position while restricting the swinging operation of the EXH main lever 13 so that the return means is brought into a return operation standby state. And the articulating arm 18 protruding therefrom.

The E / R switch 14 has three operation positions, namely, 1. OFF, 2. EXH BRAK
2. E ON, RETARDER OFF, EXH B
RAKE ON, RETARDER ON, and the operation shaft 19 is slidably protruded from the top.
9 is engaged with an engagement hole 20 provided at the tip of the interlocking arm 17 of the operation lever 4. Then, the operation lever 4 is
By displacing to the position of the scale, which is provided in the middle of the lever 4 and displays each operation position, the interlocking arm 1
The operation shaft 19 of the E / R switch 14 is brought to the three operation positions via the switch 7.

Next, the articulating arm 18 of the EXH main lever 13 forms a spring hole 21 in the longitudinal direction from the tip,
The coil spring 22 is accommodated therein, and the roller 23 is held at the tip of the coil spring 22. As shown in FIG. 3, the articulating arm 18 is formed on an edge 24 inside the corner near the center of the housing 2 facing the substantially U-shaped space 3 on the upper surface of the housing 2. Step surface 2
5 is movably pressed through a roller 23 by the spring force of the coil spring 22. in this case,
The step surface 25 is provided with the EXH main lever 13 and the operation lever 4.
When the E / R switch 14 is displaced about the swing center axis 16 to determine the stroke angle of the operation lever 4, the E / R switch 14 is set to 1. When in the OFF position, the roller 23 at the tip of the articulating arm 18 has a valley 25a on the step surface 25 near the substantially U-shaped space 3.
Abuts on the hem from the top to the mountain 25b. Further, the E / R switch 14 is set to 2. EXH BR
When swinging to the AKE ON, RETARDER OFF positions, the roller 23 at the tip of the articulating arm 18 rides over the peak 25b and is at the center trough 25c. Further, the E / R switch 14 is set to 3. EXH BRAKE O
When swinging to the N, RETADER ON position,
The roller 23 at the tip of the articulating arm 18 has a central valley 25
From position c, it is at a position over a mountain (described later) of the rocker arm 31 constituting the return means 30. The E /
R switch 14 In this position, the central valley portion 25c of the stepped surface 25 of the articulating arm 18 where the roller 23 is provided is most distant from the swing center axis 16 of the EXH main lever 13.

Therefore, the return means 30 will be described below. The return means 30 is rotatably mounted on the spacer shaft 11b erected on the edge portion 24 near the space portion 3 of the substantially U-shape and rotatably mounted, and a rocker arm 31 screwed to the top of the spacer shaft 11b. At the corner near the substantially U-shaped space 3, there is a rocker 33 rotatably held around a shaft 32 inserted toward the inside of the housing 2 as a rotation axis (FIG. 3, FIG. (See FIG. 4).

The rocker arm 31 includes a spacer shaft 1
A central cylinder 31a for rotatably mounting to the central cylinder 1b, an urging arm 31b for applying an urging force to the central cylinder 31a in a counterclockwise direction in the drawing, and an abutment with the rocker 33 by an urging force. And a locking arm 31c having a structure for stopping. That is, the urging arm 31b is provided with the pin 3 implanted in the bearing plate 12.
4 is connected to the tension spring 35 so as to always urge the rocker arm 31 counterclockwise. In the locking arm 31c, a claw portion 36 is provided on the distal end side, which comes into contact with the distal end of the rocker 33 with an urging force.

On the other hand, the rocker 33 is brought into contact with the claw portion 36 at the tip of the locking arm 31c at the tip thereof to form the rocker arm 31.
And a support arm 33a provided with a locking claw 37 for supporting the support arm 33. Further, the support arm 33a
And an operating arm 33b protruding in a shifted direction. In the return means 30 as described above, the E / R switch 14 is operated by the operation lever 4 under the urging of the tension spring 35. EXH BRAKE ON, RETARDERO
When swinging to the N position, the urging arm 31b of the rocker arm 31 is pushed in by the articulating arm 18, and
The locking arm 31c side is brought to the step surface 25 formed on the edge portion 24, and the locking arm 31c of the rocker arm 31 is provided.
The claw 36 at the tip is supported by the support arm 33a of the locker 33.
And the locking arm 31c
Then, the E / R switch 14 is protruded in the form of a peak equivalent to the peak 25 b of the step surface 25, passes through the articulating arm 18, and holds the articulating arm 18. In the position.

An operating shaft 33b of the rocker 33 is connected to an interlocking shaft 39 which is a driving means for automatic return and is attached to a driving shaft 38a of a solenoid 38 at a right angle. The interlocking shaft 39 penetrates through the housing 2 and is provided with an operating arm 33 of the rocker 33 that is rotatably held around the shaft 32 inserted into the housing 2.
b. The solenoid 38 is mounted inside the housing 2 (see FIG. 5), and is energized to form the drive shaft 38.
a, the operating arm 33b of the rocker 33 is pulled in via the interlocking shaft 39, and the locking arm 3 of the rocker arm 31 is actuated.
The locking claw 37 of the support arm 33a of the rocker 33 is disengaged from the claw portion 36 at the tip of 1c, and the rocker arm 31 is displaced counterclockwise by the urging force of the tension spring 35, so that the locking arm 31c Then, the peak-shaped portion protruding from the step surface 25 equivalently to the peak portion 25b is retracted, and the articulating arm 18 is moved to the center valley portion 25c on the step surface 25.
1. EXH BRAKE ON, R
It automatically returns to the ETARDER OFF position. It should be noted that a known drive unit such as an air pressure drive unit can be applied to the drive unit for automatic return in addition to the solenoid 38.

The automatic switch return mechanism in the vehicle according to the present invention is configured as described above. Next, the operation of the mechanism will be described. The driver uses the control lever 4
The auxiliary brake can be actuated or released simply by switching the. First, the operation lever 4
Is 1. When in the OFF position, the articulating arm 18
Abuts on the step surface 25 from the valley portion 25a near the substantially U-shaped space portion 3 to the crest portion 25b from the valley portion 25b (see FIG. 3). Here, by operating the operation lever 4, 2. EX
When brought to the H BRAKE ON, RETARDER OFF position, the EXH main lever 13 is displaced about the swing center axis 16,
The R switch 14 is linked, and the E / R switch 14 Operation position. At this time, the articulating arm 18
The roller 23 at the leading end moves while being in contact with the step surface 25 under the bias of the coil spring 22, and from the skirt portion of the step surface 25 from the valley portion 25 a to the peak portion 25 b,
It is brought to the central valley portion 25c of the step surface 25 over the mountain portion 25b. Since a predetermined resistance is applied when the user climbs over the mountain 25b, the operation lever 4 can be given a sense of movement.

In the operation state of the auxiliary brake,
When the accelerator pedal is depressed or the clutch is disengaged during driving, EX is automatically set.
When HBRAKE is turned off and the accelerator pedal is returned or the clutch is engaged, the EXH BRAKE
Is in the operating state.

Further, the operating lever 4 is operated to E
When brought to the XH BRAKE ON, RETARDER ON position, the E / R switch 14 is interlocked via the interlocking arm 17 and 3. (See FIG. 6). That is, the E / R switch 14 is operated by the operating lever 4 under the bias of the tension spring 35. EXH B
When the player swings to the RAKE ON, RETARDER ON position, the rocker arm 31 is moved by the articulating arm 18.
Of the locking arm 31c at the tip of the locking arm 31c of the rocker arm 31 by pushing the biasing arm 31b at
Can be locked to the locking claw 37 of the support arm 33a of the rocker 33, and the locking arm 3 of the rocker arm 31 can be locked.
1c protrudes in the form of a ridge equivalent to the ridge 25b of the step surface 25, so that the articulating arm 18
Under the bias of the coil spring 22, the coil spring 22 moves while abutting against the step surface 25, climbs over the mountain of the locking arm 31c, and reaches the flat surface of the edge 24. Position. 3. In the position of
XH BRAKE and RETARDER are in the ON state, and during normal driving, the function of the service brake can be effectively assisted by the synergistic action, and the load on the service brake can be suppressed.

In this state, if an accelerator operation or a clutch operation is performed (see FIG. 7), it is determined that the accelerator operation or the clutch operation has been performed, and the drive power is applied to the solenoid 38 to excite it, and the drive shaft 38a, The operation arm 33b of the rocker 33 is pulled in via the interlocking shaft 39 and operated. As a result, the locking claw 37 of the support arm 33a of the rocker 33 is disengaged from the claw portion 36 at the tip of the locking arm 31c of the rocker arm 31.
1 is displaced counterclockwise by the urging force of the tension spring 35, and from the step surface 25 in the locking arm 31c,
Retreat the peak-shaped portion that is projected to be equivalent to the peak 25b,
1. The articulating arm 18 is provided at the central valley 25c of the step surface 25, and EXH BRAKE ON, RETAR
It automatically returns to the DER OFF position (see FIG. 8). Then, even if the accelerator operation and the clutch operation are stopped, the E / R switch 14 operates as follows: EXH BRA
Since the KE ON and RETARDER OFF positions remain, the RETARDER does not operate and the EXH
Only BRAKE operates (see FIG. 7).

Then, the E / R switch 14 is operated by the operation lever 4 to 1. By returning to the OFF position, all the auxiliary braking actions can be cut off. As mentioned above,
The driver can operate or release the auxiliary brake simply by switching the operation lever 4 of the auxiliary brake switching mechanism 10. In other words, in normal operation, running at least with the EXH BRAKE applied can reduce the load on the service brake, so that during normal operation the EXH BR
AKE is operated, special driving situation,
For example, when a high speed cruise operation on a highway, a long downhill operation, or when an excessive amount of cargo is loaded, the RETARDER is applied to the service brake together with the EXH BRAKE, so that a stronger control system is provided. Power can be secured, which contributes to safe driving. In addition to the EXH BRAKE, once the accelerator operation or the clutch operation is performed from the state in which the RETARDER is actuated, the above-mentioned special driving situation is achieved. Is completed, the auxiliary brake switching mechanism 10 is automatically switched so that the vehicle travels with the EXH BRAKE applied. Therefore, there is no fear of forgetting to perform the release / return operation. Since the RETARDER main body is disposed on the propeller shaft, the rotational load applied to the propeller shaft is prevented more than necessary, which leads to prevention of deterioration of the fuel consumption rate.

As described above, the present invention has been described with reference to the auxiliary brake switching mechanism 10 as an automatic switch return mechanism in a vehicle. However, the present invention is not limited to the auxiliary brake switching mechanism 10, but the casing 2 of the combination switch 1. It can also be applied as a switch return mechanism for performing operations with another operation lever mounted on a vehicle, for example, when turning, changing lanes, or cornering. In other words, in this case, although not shown, the rocker 33 of the return means 30 is connected to the rocker 33 of the return means 30 so as to be linked with the movement of the steering shaft located in the substantially U-shaped space 3 of the housing 2. An interlocking arm that comes into contact at a certain rotational position is protruded, and the steering shaft is returned to the certain rotational position by the returning operation of the steering wheel.
Is interlocked with the steering shaft via the interlocking arm, the rocker arm 31 is returned and rotated by the spring force, and the operation lever is returned to the neutral position via the articulating arm. In any case, the automatic switch return mechanism in the vehicle can eliminate the complexity of the centralized operation of the combination switch 1. Further, the present invention can be applied to a switch of another electric component in a vehicle. That is, it is possible to prevent forgetting to perform the return operation, thereby preventing waste of power consumption, damage to the mechanism, and the like.

[0020]

As described above, according to the present invention, in a combination switch disposed near a steering wheel of a vehicle and capable of centrally operating various mechanisms of the vehicle, the switch operation is rationalized and the smooth operation of the mechanism is achieved. Becomes possible. For example, in an auxiliary brake switching mechanism, the auxiliary brake can be operated or released only by switching the operation lever. At this time, as long as the auxiliary brake is not completely released, the vehicle can be driven in a state where the EXH BRAKE is applied, so that the burden on the service brake can be reduced. Moreover,
Under special driving conditions, EXH BRA
Since the RETARDER is operated together with the KE, a stronger braking force can be secured, which contributes to safe driving, and furthermore, EXH BRAK
If the accelerator operation or the clutch operation is performed once from the state in which the RETARDER is actuated together with E, it is determined that the above-described special driving situation has been completed.
Since the vehicle is automatically switched so that the vehicle travels with BRAKE applied, there is no fear of forgetting to perform the release / return operation. In addition, since you do not forget to release and return operation,
It leads to prevention of deterioration of fuel consumption rate.

[0021]

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of a main part showing one embodiment of a combination switch in a vehicle provided with an automatic return mechanism according to the present invention.

FIG. 2 is an exploded perspective view showing a configuration of an automatic return mechanism of a switch in the vehicle shown in FIG. 1;

FIG. 3 is an explanatory plan view showing a configuration of an automatic switch return mechanism in the vehicle shown in FIG. 1;

FIG. 4 is an enlarged explanatory view of a configuration of a return unit of the automatic return mechanism shown in FIG. 3;

FIG. 5 is an explanatory cross-sectional view of a main part of an automatic switch return mechanism in the vehicle shown in FIG. 1;

6 is an explanatory plan view when the E / R switch is switched to a second position by an operation lever in the combination switch in the vehicle shown in FIG. 1;

FIG. 7 is a time chart for explaining the operation of an automatic switch return mechanism in the vehicle shown in FIG. 1;

8 is a view showing a combination switch in the vehicle shown in FIG. 1 in which an E / R switch is moved from a second position;
It is a plane explanatory view at the time of returning to the 1st position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Combination switch 2 Housing 3 Space part 4 Operation lever 5 Operation knob 6 Rotation changeover switch 7 Push button 10 Auxiliary brake switching mechanism 11a, 11b, 11c Spacer shaft 12 Bearing plate 13 EXH main lever 14 E / R switch 15 EXH bearing plate DESCRIPTION OF SYMBOLS 16 Oscillating shaft 17 Interlocking arm 18 Articulating arm 19 Operating shaft 20 Engagement hole 21 Spring hole 22 Coil spring 23 Roller 24 Edge 25 Step surface 25a, 25c Valley 25b Crest 30 Return means 31 Rocker arm 31a Center cylinder 31b Urging arm 31c locking arm 32 shaft 33 rocker 33a supporting arm 33b operating arm 34 pin 35 tension spring 36 claw 37 locking claw 38 solenoid 38a drive shaft 39 interlocking shaft

Claims (4)

[Claims] 1. A switch for operating electrical components provided on a vehicle, the switch having a plurality of contacts for switching and executing a plurality of operations, and having an operation means for switching an electrical connection of these contacts. Operating the contact by the operating means to execute the selected operation, and, during the execution of the operation, means for detecting that the operation has been completed, or detecting that the operation state is in opposition to the operation. A switch in a vehicle, comprising: automatic operation responding means for returning an operation position to a state before the operation or returning to a specific operation position according to a detection signal of the detection means. Automatic return mechanism. 2. The switch according to claim 1, wherein the switch is a turn signal switch in the vehicle that is held near a steering wheel through a steering shaft. The switch activates a predetermined direction indicator light provided at a predetermined position in the vehicle. Operating the steering wheel by operating the contact to the left or right to indicate the direction, turning the direction, and then turning off the contact via the steering shaft by the returning operation of the steering wheel. 2. A switch automatic return mechanism according to claim 1, further comprising a return means for automatically returning to a position. 3. The switch according to claim 1, wherein the switch is a combination switch in which various switches are combined mainly based on a turn signal of a vehicle which is held near a steering wheel through a steering shaft. The auxiliary brake switching mechanism includes an OFF position in which the auxiliary brake is not activated by the operation lever, a first position in which the exhaust brake is activated, and a retarder together with the exhaust brake. An auxiliary brake changeover switch configured to switch to an actuated second position, wherein the operation lever switches the auxiliary brake changeover switch to a second position to operate the accelerator or clutch. 2. The automatic switch return mechanism according to claim 1, further comprising a return unit that automatically returns the auxiliary brake changeover switch to the first position by operation. 4. The auxiliary brake switching mechanism includes a swingable swingably held by an operation lever, and an auxiliary brake changeover switch that swings and interlocks with this displacement. An interlocking arm that is interlockably engaged with an operation member of the auxiliary brake changeover switch;
A pivoting arm that regulates this pivoting operation by pivoting, wherein the pivoting arm in the pivoting lever has a configuration in which a rolling member is held at a tip end via a biasing means, and an edge of a housing is provided. The articulation arm is movably pressed against the stepped surface formed by the urging force of the urging means via the rolling member, and the auxiliary brake changeover switch is switched to the second position by the operation lever. At this time, the auxiliary brake changeover switch is moved to the second position via the articulating arm by interlocking displacement by the articulating arm.
And a return means for automatically returning the auxiliary brake changeover switch to the first position via the articulation arm while holding the step surface, and the step surface includes:
In order to set the auxiliary brake changeover switch to the OFF position via the swing lever by the operating lever, the auxiliary brake has a valley and a peak which hold the articulating arm via the roller at the tip, and the auxiliary brake is provided via the swing lever. When the changeover switch is set to the first position, the switch has a central valley that passes over the crest and holds the articulating arm via a rolling member at the tip, and the return unit includes:
A rocker arm rotatably mounted, and a rocker, wherein the rocker arm is engaged with an urging arm that is rotationally urged in one direction by urging means, and is engaged with the rocker by an urging force. A lock arm, and the rocker has, at its tip, a support arm that supports the rocker arm by contacting the tip of the locking arm of the rocker arm, and an operating arm that protrudes in a direction away from the support arm. When the auxiliary brake changeover switch is brought to the second position via the swing lever by the operating lever under the urging of the urging means, the urging arm of the rocker arm is pushed by the articulating arm to lock the arm. Is displaced,
The tip of the locking arm of the rocker arm is locked to the supporting arm of the rocker, and the locking arm is projected in the shape of a ridge equivalent to the ridge on the step surface. While passing the moving arm, the auxiliary brake changeover switch is held at the second position through the articulating arm, a driving means is connected to the operating arm of the rocker, and an accelerator or clutch operation is performed.
By activating the driving means, the operating arm of the rocker is pulled in to operate, the supporting arm of the rocker is released from the tip of the locking arm of the rocker arm, and the rocker arm is returned to its original position by the urging force of the urging means. At least
The auxiliary brake changeover switch is set to the first position by retracting the crest-shaped portion of the locking arm that is equivalent to the crest of the step surface, and bringing the articulating arm to the center trough on the step surface. 4. The automatic switch return mechanism in a vehicle according to claim 3, wherein the switch is automatically returned.