JPH0212329Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a brake mechanism used in a wind regulator, a vehicle seat vertical adjustment device, and the like.

(Prior art) As shown in Fig. 3, the wind regulator is
It has a brake mechanism attached to the base plate a, and the pinion b in the brake mechanism is rotated by operating the handle c, and the lift arm g is driven via the driven gear d, the link arm e, and the connecting arm f, and the window glass is The brake mechanism shown in FIG. 4 is conventionally known as a brake mechanism used in this wind regulator.

In this brake mechanism, the brake housing 1
A torsion spring 2 is disposed within the housing 1 so as to press against the inner wall of the housing 1, and a core 3 having a cutout 3a is rotatably inserted inside the torsion spring 2. Also, this core 3
is integrally fixed to the handle shaft 4. Furthermore, within the space of the notch 3a of the core 3 and between the hook portions 2a and 2b of the torsion spring 2, there is a stopper plate 5 integrally formed with a pinion (corresponding to pinion b in FIG. 3). A claw portion 5a is inserted and arranged so as to be rotatable about the handle shaft 4.

Therefore, for the rotational force from the pinion side,
The claw portion 5a is the hook portion 2 of the torsion spring 2.
a or 2b is pushed to expand the outer diameter of the torsion spring 2, so the pressure force between the torsion spring 2 and the housing 1 becomes stronger,
Rotation of the pinion is prevented. On the other hand, in response to the rotational force from the handle shaft 4 side, the hook portion 2a or 2b of the torsion spring 2 receives a force from the side end portion 3b or 3c of the core 3 in a direction that reduces the outer diameter. becomes smaller, the handle shaft 4 can be rotated, and the pinion can be rotated via the torsion spring 2 and the claw portion 5a.

(Problem to be Solved by the Invention) In this type of brake mechanism, the gap between the hook portions 2a, 2b of the torsion spring 2 and the side ends 3b, 3c of the core 3 is
It is better to make it as small as possible since it may cause play in the handle shaft 4. However, due to problems with the machining accuracy of each part, designs tend to create gaps. This is because the side ends 3b and 3c of the core 3
are the hook portions 2a and 2b of the torsion spring 2.
This is because if it is assembled in such a way that it is even slightly involved, the braking force will decrease and the performance of the brake mechanism will deteriorate. For this reason, the conventional brake mechanism had a problem in that the core 3 and the handle shaft 4 had backlash.

The present invention was devised in view of the above problems, and its purpose is to provide a brake mechanism that does not have play in the core 3 or the handle shaft 4.

(Means for Solving the Problems) The present invention to solve the above-mentioned problems includes arranging a torsion spring in a brake housing so as to be in pressure contact with the inner wall of the housing, and a core on the handle shaft side having a notch carved therein. is rotatably inserted into the inside of the torsion spring, and a claw portion of a stopper plate integrally formed with the pinion within the space of the notch of the core and between the hook portions of the torsion spring. In the inserted brake mechanism, the stopper plate is provided with a protrusion toward the core, the core is provided with a recess into which the protrusion fits, and the core is aligned between the inner wall of the recess and the protrusion. This feature is characterized by the provision of a spring that biases in the direction.

(Operation) In the brake mechanism of the present invention, a spring force acts between the protrusion of the stopper plate and the core, and the core is urged to rotate in one direction, thereby eliminating play in the core and the handle shaft. .

(Example) Hereinafter, an example of the present invention will be described in detail using FIG. 1 and FIG. 2. In these figures, the same parts as in FIG. 4 are designated by the same reference numerals, and their explanations will be omitted. In the figure, 6 is a pinion, and the pinion 6
The stopper plate 5 integrally formed with the
A protrusion 5b is provided toward the core 3. On the other hand, the core 3 is provided with a recess (arc-shaped elongated hole) 3e into which the projection 5b can fit. 7 is a compression spring, which is connected to the inner wall of the recess 3e and the projection 5b.
(inside the recess 3e), and urges the core 3 to rotate in the counterclockwise direction in FIGS. 1 and 2.

According to such a configuration, the side end portion 3c of the core 3
is pressed by the compression spring 7 against the hook portion 2b of the torsion spring 2 in the braking state (the position shown in FIG. 2). Therefore, no backlash occurs in the core 3 or the handle shaft 4. Here, regarding the length of the recess 3e, the length is selected to be large enough to allow the core 3 to further rotate in the state shown in FIG. There is.

In the above embodiment, the core 3 is urged to rotate by the compression spring 7 wound in a coil, but it is also possible to use a tension spring locked between the protrusion 5b and the core 3. Alternatively, a leaf spring or the like may be used. Further, the direction in which the core 3 is urged to rotate may be clockwise in FIGS. 1 and 2.

(Effect of the invention) As explained above, according to the invention, the core is urged to rotate in one direction by the spring, and its side end is pressed against the hook part of the torsion spring. , the looseness of the core and handle shaft is removed.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
2 is a block diagram of the embodiment shown in FIG. 1, FIG. 3 is a block diagram of a wind regulator, and FIG. 4 is a block diagram of a conventional brake mechanism. DESCRIPTION OF SYMBOLS 1... Brake housing, 2... Torsion spring, 2a, 2b... Hook part, 3... Core, 3a... Notch, 3b, 3c... Side end part, 4...
...Handle shaft, 5...Stopper plate, 5a...
...Claw portion, 5b...Protrusion, 6...Pinion, 7...
compression spring.

Claims (1)

[Scope of utility model registration request] A torsion spring is arranged in the brake housing so as to be in pressure contact with the inner wall of the housing, and a core on the handle shaft side having a cutout is rotatably inserted into the inside of the torsion spring. In a brake mechanism in which a claw portion of a stopper plate integrally formed with a pinion is inserted between a hook portion of the torsion spring in a space of , the stopper plate is provided with a protrusion toward the core; A brake mechanism characterized in that the core has a recess into which the projection fits, and a spring is disposed between the inner wall of the recess and the projection to bias the core in one direction.