JPS6229334Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a stick-type parking brake for a vehicle, and particularly relates to an improvement of its operating section.

[Prior Art] A conventional stick-type parking brake was constructed as shown in FIG.

That is, a T-shaped handle 2 is fixed to one end of a stick-type brake operating rod 1, and the other end is loosely fitted to a yoke 3, and the yoke 3 is pivotally connected to a parking brake lever 5 via a pin 4, and the lever is pivotally supported by a pin 8 to a bracket 7 attached to the vehicle body 6. The brake operating rod 1 is slidably inserted into a guide cylinder 9, and the guide cylinder 9 is pivotally supported by a bracket 7 with a pin 10. The pin 10 has an engaging claw 1
1 is pivotally supported, and the engaging claw 11 is urged to rotate toward the operating rod 1 by a torsion spring 12 wound around the pin 10. The yoke 3 has a long hole 13 and a long hole 13 provided therein.
A torsion spring 15 is wound between the pin and the hole 17 of the parking brake lever 5, and a torsion spring 15 is wound between the pin and the hole 17 of the parking brake lever 5. The operating rod 1 has teeth 1 formed on the outer periphery of the operating rod 1 in the axial direction.
6 and the engaging claw 11 are biased to a rotational position in which they are aligned.

In the stick-type parking brake configured as described above, by holding the handle 2 and pulling the operating rod 1 in the direction a, which is the anti-release direction, the lever 5 and the cable 38 are released.
The parking brake can be activated via the Next, when releasing the parking brake, hold the handle 2 and rotate the operating rod 1 in the direction b of the release direction around the axis, so that the teeth 16 that are engaged with the engaging pawl 11 engage with the engaging pawl 11. The locking mechanism is released by removing it from the engaged position. In this state, the parking brake can be released by moving the operating rod 1 in the direction a opposite to the axial release direction.

[Problems to be solved by the invention] However, in such conventional stick-type parking brakes, limbs, objects, etc. may inadvertently come into contact with the parking brake handle and rotate the operating lever, causing the driver's injury. The drawback was that there was a risk that the parking brake could be released against one's will, leading to an unexpected accident. To solve this problem, Japanese Patent Publication No. 51-41256 and Utility Model Publication No. 54
As proposed in Japanese Patent No. 121423, there is known a device that does not release the parking brake unless a button is operated and a handle is rotated. However, with this device, the spring member that stabilizes the handle in a predetermined position is exposed outside the stick-type parking brake, so there is a possibility of corrosion due to moisture, and there are problems with reliability and aesthetics. It was hot.

[Objective of the Invention] The objective of the present invention is to eliminate the above-mentioned conventional drawbacks by improving the operating portion of the parking brake to provide a two-operation release stick-type parking brake in which the parking brake can be released only by two operations of the handle portion, and which is excellent in durability, reliability and aesthetics.

[Embodiment] Next, the configuration of an embodiment of the present invention will be described with reference to FIGS. 3 and 4. First, as shown in FIG. 3, a joint 31 having a diameter larger than that of the operating rod 1 is formed at the end of the operating rod 1 on the handle 2 side, and is loosely fitted into a joining hole 28 bored in the handle 2. . The handle 2 is rotatably attached to the operating rod 1 via a bearing 29 with a screw 32. A torsion spring 25 installed in spring holes 27 and 26 drilled on the axis between the end of the joint 31 of the operating rod 1 and the handle 2 allows the handle 2 to rotate in the opposite direction b. energized. On the other hand, in the radial direction of the handle 2, a push rod 19 having an engagement rod 20 with a slightly larger diameter at its tip is slidably fitted into a push rod hole 30 and an engagement rod hole 23 bored in the handle 2. . An engagement hole 24 into which the engagement rod 20 loosely fits is formed in the joint portion 31 of the operating rod 1 at a position corresponding to the engagement rod 20 . A push button 18 having a diameter larger than that of the push rod 19 is screwed onto the other end of the push rod 19, and is loosely fitted into a push button hole 22 formed in the handle 2.
A spring 21 is loosely fitted to the push rod 19 between the handle 2 and the handle 2, and the push button 18 is biased toward the outer surface of the handle. The spring 21 causes the push button 18 to move to the handle 2.
The appropriate amount of protrusion from the outer surface is approximately half the size of the push button 18.

Next, the engagement rod 20 and the engagement hole 24 are placed in the engagement position,
The structure of a stopper device for stopping rotation of the handle 2 will be explained with reference to FIG. The stopper plate 34 is pivotally supported by a bracket 37 via a pin 35, and the bracket 37 is attached to the handle 2 via a bearing 29. The stopper plate 34 is a pressing spring 36
The handle 2 is biased in the direction b and pressed by the bracket 37, and comes into contact with the stopper rod 33 fixed to the operating rod 1, stopping the rotation of the handle 2 in the direction opposite to b, so that the handle 2 can be inserted into the engagement hole 24. It is positioned like this.

In the embodiments described above, the brake release direction is set to direction b, but this is suitable for left-handed operation, and when the parking brake is installed on the right hand side, the brake release direction is opposite to b, and the stopper device is also set in the same direction. You need to change accordingly.

Next, the operation of this embodiment will be explained. When releasing the parking brake in the two-operation release stick-type parking brake configured as described above, the push button 18 is pushed in, the engagement rod 20 is inserted into the engagement hole 24, and the handle 2 is rotated in the direction b. , the operating rod 1 connected to the handle rotates, and the teeth 16 engaged with the engaging pawl 11 engage with the engaging pawl 1.
The parking brake can be released by disengaging the operating lever 1 from the engagement position with the lever 1 and moving it in the direction opposite to a by the biasing force of a brake spring (not shown). To activate the parking brake, hold the handle 2 and pull the operating rod 1 in the direction a to engage the engagement pawl 11 and the teeth 16, keeping the handbrake in the activated state. Ru.

When a hand, foot, object, etc. inadvertently contacts the parking brake handle 2 against the driver's will, first, when a force is applied to rotate the handle 2 in the direction b, the handle 2 releases the torsion spring 25. Although the operating rod 1 rotates idly against the urging force of
Since it is not fitted into the engagement hole 24, it does not rotate, the engagement claw 11 and the teeth 16 remain engaged, the parking brake is not released, and the brake state is maintained. Next, when a force that causes rotation in the opposite direction b is applied, the force is transmitted from the stopper plate 34 fixed to the handle 2 to the stopper bar 33 and attempts to rotate the operating rod 1; Since the pin 14 protruding from the long hole 13 is in contact with the end of the elongated hole 13 in the direction opposite to b, the handle 2 and the operating rod 1 do not rotate, and the parking brake is not released.

Further, since the torsion spring 25 is completely enclosed inside the handle 2, it has excellent durability, moisture resistance, and high reliability, and does not spoil the aesthetics of the interior of the vehicle. The minimum requirement for a vehicle is to be able to withstand use in harsh environments, but to do so, metal products such as springs that may be subject to corrosion need to be waterproof and protected from damage. . In this embodiment, as described above, the torsion spring 25 is installed inside the handle 2, so the durability of the torsion spring 25 is improved, and the parking brake, a component that greatly affects safety and usability, is durable. As a result of this feature, high reliability can be ensured. Furthermore, the interior of the vehicle is a type of living space, and it is not desirable for mechanical components such as springs to be exposed. This embodiment is also fully satisfactory in this respect.

Moreover, if the torsion spring 25 inside the handle 2 breaks due to long-term use of the parking brake,
After replacing the torsion spring 25, it is necessary to add an appropriate amount of tension to the spring, but in that case, after installing the torsion spring 25, it is only necessary to rotate the handle 2 several times in direction b (usually 1 to 2 turns) as permitted by the stopper device. There is an advantage that the tension of the torsion spring 25 can be obtained as follows.

[Effects of the invention] Next, the effects of the invention will be explained. The present invention is a two-operation release stick-type parking brake that is configured to release the parking brake only when two different operations are performed: pushing the push button and rotating the parking brake handle. It has the effect of being able to maintain a high level of safety without being released unless there is a positive will.

In addition, the spring that stabilizes the steering wheel in a predetermined position is completely wrapped inside the steering wheel, providing excellent durability, moisture resistance, and high reliability. Nor.

Also, if the spring in the handle breaks due to long-term use of the parking brake, it is necessary to apply appropriate tension to the spring after replacing it.
In this case, there is also the advantage that the required spring tension can be obtained by simply rotating the handle several times in the direction permitted by the stopper device after the spring is attached.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing the operating part of a conventional stick-type parking brake, and Figs. 2 to 4 are views showing an embodiment of the two-operation release type stick-type parking brake of the present invention. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is an enlarged perspective view of the main part. 1...Brake operating rod, 2...Handle, 18
...Push button, 20...Engagement rod, 21...Spring,
24...Engagement hole, 25...Torsion spring, 28...Joining hole, 29...Bearing, 31...Joint portion, 33...
Stopper rod, 34... Stopper plate.

Claims (1)

[Scope of utility model registration request] The parking brake is released by rotating the operating rod around the axis using a handle connected to the brake operating rod in the releasing direction to remove the lock mechanism, and then moving the operating rod in the axial releasing direction. In the stick-type parking brake, the handle is rotatably coupled around the axis of the operating rod, and a spring biasing the handle in an anti-release direction is disposed between the operating rod and the handle. A spring is provided inside the handle, and the other end of the push button protruding from the outer surface of the handle slidably and outwardly biases an engagement rod, the other end of which is loosely fitted into an engagement hole formed in the operating rod. a rotation stopper disposed between the handle and the push button, the rotation stopper preventing rotation only in the anti-release direction when the handle is in a position where the engagement hole and the engagement rod are loosely fitted. A two-operation release type stick type parking brake, characterized in that a device is provided between the handle and the operating rod.