JPS6242849Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a parking brake operating device for an automobile, and more particularly to a two-operation release stick-type parking brake operating device.

A stick-type parking brake operating device generally consists of a plunger connected to a parking brake operating cable at one end, pulled forward by a handle attached to the other end, and a ratchet tooth row carved on the surface of the plunger and a guide member for the plunger. The return of the plunger is restricted by engagement with a pawl member attached to the holder, and the parking brake is maintained in the operating state.To release the parking brake, the plunger is rotated by a handle, and the ratchet tooth row of the plunger is engaged with the pawl member. This is done by removing the . However, the stick-type parking brake operating device with this structure,
If a limb accidentally touched the handle and the plunger rotated, the parking brake would be deactivated and there was a risk of an unexpected accident.

In order to prevent such unexpected hazards from parking brakes, the handle is mounted so as to be rotatable at a predetermined angle relative to the plunger, and the handle is usually held at a predetermined rotational position relative to the plunger by a spring. A clutch mechanism is provided that connects the handle and plunger so that they rotate together by pressing the provided lock knob with the thumb, so that when a limb accidentally touches the handle, the handle rotates relative to the plunger and the plunger does not rotate. A configuration is proposed. However, the handle is generally operated using four fingers excluding the thumb, and the use of the thumb makes the handle operation complicated.

The purpose of this invention is to provide a two-operation release stick type that prevents the parking brake from being released against the driver's intention even if a hand or foot accidentally touches the steering wheel, and that does not require the use of the thumb to operate the steering wheel. The object of the present invention is to obtain a parking brake operating device.

The basic structure of the present invention is that an axial groove is provided on the surface of the plunger, and a lock rod is slidably fitted into the axial groove so that it can rotate relative to the plunger by a predetermined angle and cannot slide in the axial direction of the plunger. The fitted handle has a lock groove in which one end of the locking rod can be engaged and detached by sliding the locking rod, and a locking knob for sliding the locking rod is fitted to the plunger so that it can slide in the axial direction of the plunger but cannot rotate. A coil spring is disposed between the lock knob and the handle to urge the handle in a predetermined rotational direction by locking both ends to the lock knob and the handle, respectively, and to bias the lock lock and the lock knob in a direction away from the handle. be.

Hereinafter, embodiments of the present invention will be described based on the drawings.

1 to 4, the handle 2 fitted to the end of the plunger 1 includes a sleeve 3 made of metal;
It consists of a core plate 4 made of metal and welded to the right end of the slab 3, and a grip part 5 made of resin.

The plunger 1 itself has a known structure, and a ratchet tooth row is provided along the axial direction in a portion not shown in the figure to engage with a pawl member (not shown) attached to a plunger guide member (not shown). be.

The sleeve 3 of the handle 2 fits over the end of the plunger 1. The sleeve 3 is provided with a circumferential elongated hole 6, into which the end of a pin 8 press-fitted into a radial hole 7 of the plunger 1 is slidably fitted. As a result, the handle 2 becomes the plunger 1.
On the other hand, the handle 2 can be rotated by a predetermined angle from the position where the pin 8 abuts on one end of the elongated hole 6 to the position where the pin 8 abuts on the other end of the elongated hole 6. It cannot be slid. The direction of rotation of the plunger for releasing the parking brake is counterclockwise in FIGS. 3 and 4.

An axial groove 9 is provided on the surface of the plunger 1, into which a lock rod 10 is slidably fitted. The locking rod 10 has bent portions 11 and 12 at both ends, and one bent portion 11 is fitted into a notch 14 of a locking knob 13 fitted to the plunger 1. The lock knob 13 has an elongated hole in the axial direction of the plunger, and a pin 16 press-fitted into the plunger 1 is slidably fitted into this elongated hole. As a result, the lock knob 13 is connected to the plunger 1.
It is possible to slide against it, but it cannot rotate.

The sleeve 3 of the handle 2 has a lock rod 10.
A lock groove 17 is provided in which the other bent portion 12 can be engaged and disengaged by sliding the lock rod 10. A claw portion 19 of a cover 18 adjacent to the sleeve 3 is fitted into the lock groove 17. Handle side end of lock knob 13 and lock rod 10
A coil spring 21 disposed between the cover 18 and the washer 20 adjacent to the bent portion 12 biases the locking knob 13 and the locking rod 10 away from the handle 2 via the washer 20. 23 to cover 18 protrusion 2
4 and pin 16 respectively, and the cover 1
8 clockwise in FIG. The cover 18 and the handle 2 are connected to the claw part 19 of the cover 18 and the handle 2.
The coil spring 21 biases the handle 2 clockwise in FIG. 3 because the handle 2 is not relatively rotatable due to its engagement with the lock groove 17.

Normally, the coil spring 21 holds the handle 2 in the state shown in FIG. 1 relative to the plunger. The lock knob 13 and the lock rod 10 are fixed to the pin 16 by the coil spring 21.
The locking knob 13 is held at a position away from the handle 2 (FIGS. 1 and 2) until its sliding is regulated, and the bent portion 12 of the locking rod 10 is located outside the locking groove 17 of the handle 2. .

When the driver pulls the handle 2 toward him to activate the parking brake, the force applied to the handle 2 is transmitted to the plunger 1 via the pin 8, and the handle 2 and plunger 1 move together to apply the parking brake. Operate.

When the parking brake is activated, the reaction force of the parking brake is applied to the engagement portion between the ratchet tooth row of the plunger 1 and the pawl member, and rotational resistance is applied to the plunger 1. This rotational resistance is caused by the coil spring 21
is larger than the force that urges the in the direction of rotation. Therefore,
When a hand or foot inadvertently touches the handle 2 and a counterclockwise force is applied to the handle 2 as shown in Figure 3, the handle 2 only rotates relative to the plunger 1, the plunger 1 does not rotate, and the parking brake is activated. is retained.

When the driver puts his hand on the handle 2 to release the parking brake, his index finger gets caught on the hooked part 13a of the lock knob 13 and the lock knob 13 is turned off.
The locking rod 10 is then drawn toward the handle 2, and the bent portion 12 of the locking rod 10 engages with the locking groove 17 of the handle 2, whereby the handle 2 and the plunger 1 become unable to rotate relative to each other. Therefore, when the handle 2 is rotated counterclockwise in FIG. 3, the plunger 1 also rotates together with the handle 2, and the ratchet tooth row of the plunger 1 disengages from the pawl member, causing the plunger 1 to return. The parking brake is released.

In other embodiments shown in FIGS. 5 to 8, a circumferential groove 126 is formed on the outer periphery of the plunger 101 to connect the handle 102 to the plunger 101 in a rotatable but non-slidable manner in the axial direction. This embodiment differs from the previous embodiment in that three pins 108 whose inner ends are slidably fitted into circumferential grooves 126 are press-fitted into 103 . And plunger 10
This embodiment differs from the first embodiment in that the intended position of the handle 102 relative to the first embodiment is achieved by abutment between a step 125 provided at the end of the sleeve 103 and a bent portion 112 of the lock rod 110. The other configurations are the same as those of the first embodiment, and the configurations corresponding to those of the first embodiment are given the same reference numerals with 100 added to those used in the description of the first embodiment, and their explanation will be omitted. Further, since it is believed that the effects of other embodiments can be easily understood from the explanation of the effects of one embodiment, the explanation thereof will be omitted.

In this embodiment, since the non-press-fitted portion of the pin 108, that is, the inner end of the pin 108 that is slidably fitted into the circumferential groove 126, is small, when the parking brake is applied, the handle is pulled toward you. , the pin 10 that engages with the circumferential groove 126 of the plunger 101
In order to reduce the strength burden on the inner end of the pin 108 when a large force is concentrated on the inner end of the pin 108, three pins 108 are used in consideration of space and stability in terms of practical dimensions. However, the number of pins 108 can be changed.

In the device of the present invention as described above, the handle and plunger are connected so as to rotate together by pulling the lock knob fitted on the plunger toward the handle side with fingers, and the four fingers other than the thumb are hung on the handle. It is easy to operate because your finger rests on the lock knob. Furthermore, since one coil spring biases the lock knob and lock rod in a direction away from the handle and also biases the handle in a predetermined rotation direction, the structure is simple. Furthermore, from the perspective of the driver, the lock knob is located at the back of the handle, and the handle and plunger do not rotate together unless the lock knob is pulled toward the handle, so there is almost no possibility that the parking brake will be released inadvertently. ,
Its practical effects are enormous.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a main part of an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 2. , FIG. 5 is a plan view of the main part of another embodiment, FIG. 6 is a sectional view taken along the - line of FIG. 5, FIG. 7 is a sectional view taken along the -- line of FIG. 5, and FIG. FIG. 6 is a sectional view taken along the line - in FIG. 6; 1,101: Plunger, 2,102: Handle, 9,109: Axial groove, 10,110: Lock rod, 13,113: Lock knob, 17,1
07: Lock groove, 21, 121: Spring.

Claims (1)

[Scope of utility model registration request] A handle is fitted to the other end of the plunger, which is connected to a parking brake actuation cable at one end and has a ratchet tooth row on its surface, so as to be rotatable but not slidable in the axial direction of the plunger. A locking groove is provided in the handle, in which a locking rod is slidably fitted into the groove, and one end of the locking rod can be engaged and disengaged by sliding of the locking rod, and a locking knob for sliding the locking rod is provided on the plunger, and the locking knob is slidable in the axial direction of the plunger. A coil spring is disposed between the lock knob and the handle to bias the lock knob and the lock rod away from the handle and to bias the handle in a predetermined rotational direction. The two-operation release type parking brake operating device is configured such that the handle and plunger rotate together only when one end of the locking rod is engaged with the locking groove by pulling the plunger toward the handle.