JPS6348742B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a parking brake lever device for a vehicle, and more particularly to a parking brake lever device having a misunderstanding prevention device.

There are two types of parking brake lever devices: a rotary lever type that is installed on the side when driving, and a stick type that is installed in front of the driver's seat and pulled out toward the driver's seat. However, the present invention relates to the former parking brake lever device.

The parking brake lever device must have a brake operation for tightening and releasing the brake, and a locking function for holding the brake in the tightened state during the necessary brake operation period.

As shown in FIG. 1, the conventional parking brake lever device of the rotary lever type moves a lever body 3 rotatably supported by a shaft 4 to a ratchet plate 1 fixed to the floor of the vehicle body in the direction of arrow A. By rotating, the claw portion of the claw 7, which is rotatably supported on the lever body 3 by the shaft 8, is engaged with the tooth portion (ratchet) 2 of the ratchet plate 1, and the lever body 3 is locked. Lever body 3
A rod 5 connected to one end of the vehicle holds the vehicle's braking system in operation.

To release the lock of the brake device, pull the lever main body 3 in the direction of arrow A and press the push button 10 provided on the grip part 12, so that the push rod 9 rotates the claw 7 in the direction of arrow B. , the claw portion of the claw 7 is configured to be removed from the tooth portion 2 of the ratchet 1.

Now, with the parking lever device having the above structure, when moving luggage between the driver's seat and the passenger's seat in the car, or moving through the car from the passenger's seat to the driver's seat, the push button 10 may be operated by mistake. There is a risk that the lever body 3 may be unlocked unexpectedly and the vehicle may start moving, and this is particularly dangerous if the above-mentioned erroneous operation occurs while the vehicle is stopped on a slope.

Furthermore, if a child is riding in the vehicle while the vehicle is parked, there is a great risk that the child may step on the push button while playing between the passenger seat and the driver's seat and release the lock of the brake lever device.

As a means for preventing malfunction of the brake lever device, for example, as disclosed in Japanese Patent Publication No. 51-41257, a mechanism for locking the claw is provided separately, and this locking device is operated by a small lever provided on the lower side near the grip. It is configured so that it can be canceled by

However, the above-mentioned parking brake lever device has the disadvantage that the mechanism for locking and releasing the claw is provided separately, which makes the device complicated and increases the manufacturing cost.

The present invention has been obtained in order to eliminate the drawbacks of the conventional parking brake lever device, and is capable of reliably causing brake malfunction without substantially changing the structure of the conventional parking brake lever device shown in FIG. The purpose of this invention is to provide a device that can prevent this.

In order to achieve the above object, the present invention provides a novel device that does not release the lock simply by pressing the push button of the parking brake lever device.

More specifically, when the brake mechanism is locked, a downward force is applied to the lever body, and the claw and the teeth of the ratchet plate are strongly engaged with each other. The push rod is characterized by a bent portion so that sufficient force is not transmitted to release the claw from engagement.

When unlocking the parking brake lever device of the present invention, the lever body is slightly lifted up against the downward force of the lever body, and the push rod is pressed while the claw engagement force is removed. It is done by Therefore, even if the push button is simply pressed in the locked state, the engagement of the claws will not be released due to the action of the buffer mechanism.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a partially cutaway side sectional view of the parking brake lever device according to the present invention.

Reference numeral 1 denotes a ratchet plate, the upper part of which has teeth (ratchets) 2 formed therein, and the lower part of which is fixed to the floor of the vehicle body (not shown) with bolts or the like. The lever body 3 has a substantially U-shaped cross section, and is rotatably supported on the ratchet plate 1 by a pin 4 while holding the side view of the ratchet plate 1. One end of the lever body 3 is connected to the brake of the vehicle. A rod or cable 5 for driving the mechanism is connected by a pin 6. A claw 7 is attached to a pin 8 above the tooth portion 2.
The claw 7 is rotatably supported by the lever body 3, and one end of the push rod 9 is connected to one end of the claw 7, and a push button 10 is connected to the other end. The push rod 9 has a smaller diameter than conventional push rods, and is provided with a substantially V-shaped curved portion 7a in the middle. Push button 1
0 is formed with a small diameter portion 10a, and its stepped portion 10b.
comes into contact with the end of the lever main body 3 to restrict its pushing position. A spring 11 is connected to the push button 10 between the small diameter portion 10a and a stopper 3b provided inside the lever body 3.
It is provided with pressure so as to push it out. Note 1
2 is a grip made of rubber or plastic material.

An important component of the parking brake lever device of the present invention is that when the lever body 3 is rotated in the direction of arrow A to lock the parking brake device, even if the push button 10 is pressed, the teeth of the ratchet plate 1 will not move. 2 and the teeth of the claw 7 are maintained in a meshed state by the force of the brake mechanism that presses the lever body 3 downward. To this end, in the present invention, the push rod 9 has a smaller diameter and more flexibility than conventional push rods so that it can be bent (examples of materials include steel wire, piano wire, and spring steel wire). In the example shown in FIG. 2, even if the push button 10 is pressed in the above state,
Only by bending the curved portion 9a, the force is absorbed, and the engagement between the claw 7 and the tooth portion 2 cannot be disengaged.

FIG. 3 shows another embodiment, in which the push rod 9 has a diameter smaller than that of the conventional device, and a curved portion 9b with a large radius of curvature is provided in the middle portion. Therefore, when a pressing force is applied to both ends of the push rod 9, it is further curved in the direction of arrow C, so that no strong pressing force is applied to the claw 7. Other configurations are essentially the same as the conventional device.

FIG. 4 shows yet another embodiment, in which a push rod 9 similar to the previous embodiment has a substantially right-angled curved portion 9c formed at a position near the connection portion of the claw 7.

The curved portion 9c bends (curves) in response to the same pressing force as described above, and absorbs the force.

Next, the operation of the parking brake lever device according to the present invention will be explained.

(A) Locking operation of the parking brake In Fig. 2, pull up the lever body 3 in the direction of arrow A and move the claw 7 in the direction of arrow A'.
Arrow indicates the rod 5 connected to the lever body 3.
Pull in the A″ direction to activate the vehicle's brake mechanism.

In this case, since a braking force in the direction opposite to the arrow A is applied to the lever body 3, a strong pressing force (meshing force) is applied to the meshing part D between the claw 7 and the teeth 2 of the ratchet plate 1. is working. This keeps the parking brake locked.

(B) Erroneous unlocking operation As mentioned above, the push rod 9 has a relatively small diameter and curved parts 9a, 9b, 9c.
is provided, so if you accidentally press pushbutton 1
Even if 0 is pressed, the pressing force is absorbed by the bending of the curved portion, and the strong meshing state of the meshing portion D cannot be released.

(C) Lock release operation To release the lock of the brake lever device, pull up the lever body 3 slightly in the direction of arrow A, remove the strong meshing force acting on the meshing part D, and press the push button 10. ,
The teeth of the claw 7 can be easily removed from the teeth 2 of the ratchet plate 1. And push button 1
If the lever body 3 is lowered in the opposite direction of arrow A'' while pressing the lever 0, the rod 5 will move in the opposite direction of arrow A'' and the brake mechanism will be unlocked.

As described in detail above, the present invention provides a push rod for driving a claw that engages with the push button of a parking brake lever device and the teeth of a ratchet plate, which is relatively flexible.
A curved portion is formed so that the engaged state of the teeth in the normal parking state cannot be released simply by pressing the push button.

Therefore, unless the lever body is pulled up in the parking operation direction, even if the push button is pressed, the engagement between the claw and the ratchet plate cannot be released, and the unexpected locking of the brake mechanism that previously occurred is released. Such accidents can be completely prevented.

Further, in the embodiments shown in FIGS. 2 to 4, the push rod is simply made flexible, so that conventional mounting can be used substantially as is, and manufacturing costs are significantly reduced.

The push rod according to the present invention described above is made by forming a curved portion in a relatively flexible steel wire or the like, but the material thereof is not limited to the present embodiment. In short, if the parking brake actuating device is a member that bends at its curved part and cannot disengage the claw 7 from the tooth part 2 of the ratchet plate 1 just by pressing the push button, It may be made of any material and have any cross-sectional shape. for example,
Other metal materials, nonferrous metal materials, and synthetic resins may also be used. Further, the cross-sectional shape may be round, polygonal, rectangular, or any other shape. An example of forming it from a spring steel plate is also conceivable. In any of these cases, when releasing the brake lock, move the lever body in the direction of arrow A in Figure 2.
When the engagement force between the claw 7 and the teeth 2 of the ratchet plate 1 is reduced by pulling it up in the direction, the pushing force of the push button can be transmitted to the claw 7 to release the engagement. It goes without saying that this must be done.

Further, there is a gap between the push rod 9 and the lever main body 3, and when the push button 10 is pressed to curve the curved portion 9a, the curved portion 9a
In order to prevent this, it is recommended to provide a guide G made of plastic, for example.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side sectional view of a conventional parking brake lever device that does not have a misunderstanding prevention mechanism.
FIG. 2 is a partially cut away side sectional view of a device embodying the present invention based on the device shown in FIG. 1, and FIGS. 3 and 4 are side views showing other embodiments of the push rod. 1... Ratchet plate, 2... Teeth, 3...
... Lever body, 7 ... Claw, 9 ... Push rod, 9a, 9b, 9c ... Curved portion.

Claims (1)

[Claims] 1. A ratchet plate fixed to the floor side of the vehicle body, a lever body rotatably attached to this plate,
A claw is rotatably provided on the lever body and engages with the teeth of the ratchet plate, and a push button provided on the lever body transmits the movement of the push button to the claw to release the engagement. In the device having a push rod, the push rod is provided with a curved portion, and the push rod is configured to be able to bend at the curved portion so that the engagement between the claw and the tooth portion cannot be released when the push button is erroneously operated while the parking brake is activated. A parking brake lever device characterized by: