JPH0640508Y2 - Shift lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a shift lock device for restricting movement of a shift lever of an automobile.

(Prior Art) Generally, in the case of a vehicle having an automatic transmission, when the shift lever is shifted from the parking range P to the drive range D or the reverse range R,
The car body starts moving as it is.

Therefore, for safety, a shift lock device that restricts the movement of the shift lever has been developed and put into practical use.

When the shift lever is shifted from the parking range P to another range, the shift lock device allows the shift only when the brake pedal is depressed to prevent the sudden movement after the shift as described above. A shaft that transmits the movement of the lever to the transmission, a stopper provided on this shaft, a push lot whose tip comes into contact with the brake pedal, and when the brake pedal is not stepped on due to the movement of this push lot, it is engaged with the stopper and stepped on. Is a lock lever that releases the engagement with the stopper.

That is, when the brake pedal is not depressed, the lock lever engages with the stopper and the shift lever moves the parking range P.
From shifting to another range. Then, when the brake pedal is depressed and the brake is applied, the lock lever and the stopper are disengaged from each other, that is, the lock is released, and the shift lever is allowed to shift from the parking range P to another range.

By the way, in such a shift lock device, the lock lever simply interlocks with the operation of the brake pedal,
Therefore, even when the ignition switch is off and the vehicle is not in operation, the lock is easily released when the brake pedal is depressed.

Therefore, a solenoid that engages the lock lever with the stopper is provided.When the ignition switch is off and the brake lamp switch is on, the solenoid is excited to perform a forcible lock to prevent unlocking by depressing the brake pedal. Some have been designed to improve safety.

(Problems to be solved by the device) However, there is a delay due to the "play" stroke from the start of depression of the brake pedal until the brake lamp switch is turned on (until the solenoid is energized), during which the push lot moves. There will be an unlock based.

That is, there is a problem that the shift lever moves before the forced lock.

As a means for solving this problem, it is conceivable to lengthen the push lot and turn on the brake lamp switch before the movement of the push lot.

However, doing so eliminates the "play" of the stroke of the brake pedal, which causes a new problem of dragging the brake.

This invention was made in view of the above circumstances,
It is therefore an object of the present invention to provide a shift lock device having excellent reliability and safety, which always enables proper shift lock without causing drag of the brake.

[Structure of the Invention] (Means for Solving the Problems) A shift lock device of the present invention includes a stopper attached to a shift lever mechanism and a stopper attached to the shift lever mechanism by engaging with the stopper by turning to one side. A lock lever that stops the movement and releases the engagement with the stopper by turning to the other side, and the lock lever is turned to the engaging side by the forward movement against the biasing force from the outside, so that the biasing force is the same. A plunger for rotating the lock lever to the disengagement side by a corresponding backward movement, a push lot whose tip is in contact with the brake pedal and which follows the movement of the brake pedal, and a rear end portion of this push lot. And the plunger to allow the plunger to return along with the movement of the push lot based on the depression of the brake pedal, and to allow the brake to move. When the brake pedal is stepped on with the link that moves the plunger forward in response to the movement of the push lot based on the non-stepping of the dull, and when the brake pedal is stepped on with the ignition switch off, the plunger is electrically operated regardless of the movement of the link. And a control means for moving forward by dynamic driving.

(Operation) When the brake pedal is in the non-depressed state, the push pedal is pressed by the brake pedal, and the push lot and the link apply a force in the forward direction to the plunger, so that the plunger resists the biasing force from the outside. Move.
By the forward movement of the plunger, the lock lever rotates and engages with the stopper, and the shift lever mechanism is locked.
When the brake pedal is depressed, the push lot follows the movement. The follow-up of the push lot and the accompanying movement of the link allow the plunger to move back based on the biasing force from the outside. By this return movement of the plunger, the lock lever rotates to disengage from the stopper, and the lock of the shift lever mechanism is released. However,
When the brake pedal is depressed with the ignition switch off, the electric drive causes the plunger to move forward regardless of the movement of the link. The forward movement of the plunger forcibly locks the shift lever mechanism.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 4, reference numeral 1 denotes a shaft, which is rotatably and axially slidably held by a fixed rod 2 and a holder 3. A spring 4 is provided inside the shaft 1 to apply a biasing force to the shaft 1 toward the holder 3.

A spherical body 5 is rotatably held by a fixed rod 2 existing in the shaft 1, and a shift lever 6 extends laterally from the spherical body 5. The shift lever 6 is led out through a tubular opening 1a of the shaft 1, and a sphere 7 is attached to the shift lever 6 of the tubular opening 1a.

That is, the shift lever 6 moves around the sphere 5 as a fulcrum, and the movement of the shift lever 6 is transmitted to the shaft 1 via the sphere 7.

A link lever 8 is attached to the end of the shaft 1, and the link lever 8 is connected to an automatic transmission via an operation wire (not shown).

Thus, the shaft 1, the fixed rod 2, the holder 3, the spring 4, the sphere 5, the shift lever 6, the sphere 7, the link lever 8 and the like constitute a shift lever mechanism. Of the shift lever mechanism, the shaft 1
A pin-shaped stopper 9 is attached to the side portion of.

On the other hand, 10 is a brake pedal, which is rotatably supported by a support shaft 11 so that the brake can be applied by stepping against the biasing force of a brake pedal spring (not shown). It should be noted that a predetermined "play" is ensured for the stroke when stepping on.

A stopper 10a is attached to the upper surface of the brake pedal 10. Further, on the upper surface of the brake pedal 10, a brake lamp switch 12 is provided between the stopper 10a and the support shaft 11.
Actuator is abutted.

The brake lamp switch 12 is a brake lamp which will be described later.
It is for lighting 41, and is turned on when the actuator projects a predetermined amount by depressing the brake pedal 10. The position of the brake lamp switch 12 is set as close to the support shaft 11 as possible so that the driver's toes are not caught.

A lock lever 21 is provided near the stopper 9. The lock lever 21 has a claw shape whose upper portion is engageable with the stopper 9, and an intermediate portion is rotatably supported by a support shaft 22. The movement of the shift lever mechanism is stopped, and the engagement with the stopper 9 is released by rotating the shift lever mechanism to the other side. Lock lever 21
The lower part of is connected to one end of the plunger 25 via rods 23 and 24.

A solenoid 26, which is an electric drive means, is provided so as to surround the plunger 25, and a return spring 27 is provided between the solenoid 26 and the other end of the plunger 25.

The plunger 25 moves forwards against the biasing force applied by the external return spring 27, so that the rods 23, 24
Press the lower part of the lock lever 21 via the
It functions to rotate 21 to the engaging side. Also the plunger
25 returns to the lock lever 21 via the rods 23 and 24 by returning in response to the biasing force from the return spring 27.
The lower part of the lock lever 21 is pulled in to rotate the lock lever 21 to the engagement release side.

One end of the link 28 is brought into contact with the other end of the plunger 25.
A middle portion of the link 28 is rotatably supported by a support shaft 29. And push lot to the other end of link 28
The rear end (upper end) of 30 is rotatably connected.

The push lot 30 has a tip portion (lower end portion) 30a that can be projected from the main body and accommodated in the main body.
Has a biasing force in the protruding direction and contacts the stopper 10a of the brake pedal 10 via the resin boot 31 and follows the movement of the brake pedal 10. As shown in FIG. 1, a spring 32 is provided in the main body of the push lot 30, and the tip 32a is provided by the spring 32.
A biasing force is applied in the protruding direction to.

33 is a holder for holding the push lot 30 so as to be vertically movable.

The biasing force of each spring has a relationship of return spring 27 <spring 32 <brake pedal spring.

The link 28 allows the plunger 25 to return (due to the biasing force of the return spring 27) along with the movement (lowering) of the push lot 30 based on the depression of the brake pedal 10, and allows the brake pedal 10 to be undepressed. Based on the movement (rise) of the push lot 30 based on it, it works to move the plunger 25 forward.

The electric circuit is shown in FIG.

40 is a battery power source installed in a car.
A brake lamp 41 is connected to 40 via the brake lamp switch 12.

A relay 43 is connected to the battery power source 40 via an ignition switch 42.

Relay contact (normally closed contact) 43b for brake lamp 41
The solenoid 26 is connected in parallel via.

That is, when the ignition switch 42 is off, the brake pedal 10 is depressed and the brake lamp switch 12
When is turned on, the solenoid 26 is excited.

Next, the operation of the above configuration will be described.

When the brake pedal 10 is not depressed, the brake pedal 10 pushes up the push lot 30, as shown in FIG.
The link 28 presses the lower part of the lock lever 21 against the biasing force of the return spring 27.

At this time, if the shift lever 6 is set to the parking range P, the lock lever 21 engages with the stopper 9. That is, the shaft 1 is locked and the shift lever 6
The shift lever 6 does not move even if the vehicle shifts from the parking range P to another range.

When you step on the brake pedal 10, the first "play"
In the portion, the tip portion 30a of the push lot 30 receives the biasing force of the spring 32 and follows the movement of the brake pedal 10. When the depression passes through the "play" part, the brake is applied and the brake lamp switch 12 is turned on.

When the brake lamp switch 12 is turned on, the brake lamp 41 lights up.

When the pedal is stepped on, as shown in FIG. 3, the force of the brake pedal spring is not applied to the push lot 30, and the link 25 receives the biasing force of the return spring 27 to pull in the lower part of the lock lever 21.

When the lower part of the lock lever 21 is pulled in, the engagement of the lock lever 21 with the stopper 9 is released. That is, the lock of the shaft 1 is released, and the shift lever 6 can be moved upward in the drawing to shift from the parking range P to another range.

By the way, when the ignition switch 42 is on, the relay 43 is excited and the contact 43b is turned off. Therefore, even if the brake pedal switch 12 is turned on and the brake lamp switch 12 is turned on, the brake lamp 41 only lights up and the solenoid 26 is not excited.

That is, the locking and unlocking of the shaft 1 depends only on the operation of the brake pedal 10.

On the other hand, when the ignition switch 42 is off and the vehicle is in a non-driving state, when the brake pedal 10 is stepped on and the brake lamp switch 12 is turned on, the brake lamp 41 is turned on and at the same time a power supply path to the solenoid 26 is formed.

When the solenoid 26 is excited, the plunger 25 presses the lower part of the lock lever 21 against the biasing force of the return spring 27. As a result, the lock lever 21 engages with the stopper 9 regardless of the movement of the push lot 30 and the link 28, and the shaft 1 is forcibly locked.

That is, when not in operation, even if the brake pedal 10 is depressed, the shaft 1 is kept locked to prevent unnecessary unlocking and ensure sufficient safety.

In this case, from the start of depression of the brake pedal 10 to the excitation of the solenoid 26, the tip portion 30a of the push lot 30 is
Only the brake pedal 10 under the biasing force of the spring 32
The push lever 30 does not descend yet, so that the lock lever 21 does not move.

Therefore, it is possible to prevent a problem that the lock is released while the pedal is stepped on, and it is possible to always perform an appropriate shift lock.

Moreover, since the spring 32 absorbs the displacement of the brake pedal 10 by the brake spring, the drag phenomenon of the brake as described in the conventional description does not occur at all.

That is, reliability and safety can be improved.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

[Effect of the Invention] As described above, according to the present invention, rotation of one side engages with the stopper to stop movement of the shift lever mechanism, and rotation of the other side engages with the stopper. The lock lever to release the lock lever and the forward movement against the biasing force from the outside to rotate the lock lever to the engagement side, and the return movement according to the biasing force rotates the lock lever to the engagement release side. The plunger to be pushed, the tip of which is brought into contact with the brake pedal and which follows the movement of the brake pedal, is interposed between the plunger and the rear end portion of the push lot and the brake pedal is depressed. The plunger is allowed to return along with the movement of the push lot, and the plunger is received in response to the movement of the push lot based on the non-depression of the brake pedal. And a control means for moving the plunger forward by electric drive regardless of the movement of the link when the brake pedal is stepped on with the ignition switch off. It is possible to provide a shift lock device having excellent reliability and safety, which always enables proper shift lock without causing a drag phenomenon.

[Brief description of drawings]

FIG. 1 is a diagram showing a concrete configuration of a push lot in one embodiment of the present invention, FIGS. 2 and 3 are diagrams showing a configuration of a main part in the same embodiment, and FIG. 4 is the same embodiment. Showing the structure of the shaft and its peripheral part in FIG.
FIG. 5 is a diagram showing the configuration of the electric circuit of the embodiment. 1 ... Shaft, 6 ... Shift lever, 9 ... Stopper, 10 ... Brake pedal, 12 ... Brake lamp switch, 21 ... Lock lever, 25 ... Plunger, 26 ...
Solenoid, 30 ... Pushlot, 30a ... Tip, 3
2 …… Spring, 42 …… Ignition switch.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A stopper attached to a shift lever mechanism, which engages with the stopper by rotating to one side to stop the movement of the shift lever mechanism, and engages with the stopper by rotating to the other side. The lock lever to be released and the forward movement against the biasing force from the outside rotate the lock lever to the engaging side, and the return movement according to the biasing force causes the lock lever to rotate to the engagement releasing side. A plunger, a push lot whose tip is in contact with the brake pedal and follows the movement of the brake pedal, and a push lot interposed between the plunger and the rear end portion of the push lot and based on the depression of the brake pedal. The plunger is allowed to return along with the movement of the push lot, and the movement of the push lot due to the non-depression of the brake pedal causes the push lot to move. A link for moving the runner forward, and a control means for moving the plunger forward by electric drive when the brake pedal is depressed with the ignition switch off, regardless of the movement of the link. Characteristic shift lock device.