JP2605697Y2 - Brake mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake mechanism used for a manual or electric window regulator.

[0002]

2. Description of the Related Art As shown in FIG. 4, a window regulator has a brake mechanism attached to a base plate a. A pinion b of the brake mechanism is rotated by operating a handle c to be connected to a driven gear d and integrally therewith. And a main arm e rotatably pivoted to the base plate a to drive the window glass f up and down.
As a brake mechanism used in this window regulator, those shown in FIGS. 5 and 6 have been conventionally known.

In this brake mechanism, a stopper case 1
A torsion spring 2 is disposed so as to press against the inner wall of the stopper case 1, and a core 3 having a notch 3 a cut therein is rotatably inserted inside the torsion spring 2. The core 3 is integrally fixed to the handle shaft 4. Further, in the space of the notch 3a of the core 3 and between the hooks 2a and 2b of the torsion spring 2, a claw 5a of a pinion plate 5 integrally formed with a pinion (corresponding to the pinion b in FIG. 4) is provided. Handle axis 4
Are inserted and arranged so as to be rotatable around the center. A notch 5b having a depth substantially equal to the wire diameter of the torsion spring 2 is formed at both end portions of the pinion plate 5 on the tip side of the claw portion 5a, and a hook of the torsion spring 2 is formed in one notch 5b. The portion 2b can be engaged.

Accordingly, against the rotational force from the pinion side, the side end of the claw portion 5a pushes the hook portion 2a or 2b of the torsion spring 2 and acts to expand the outer diameter of the torsion spring 2. The pressure contact force between the torsion spring 2 and the stopper case 1 increases, and the rotation of the pinion is prevented (brake state). On the other hand, against the rotation force from the handle shaft 4 side, the torsion spring 2
Of the core 3 is the side end 3b or 3c of the core 3.
, The pressing force is reduced, the handle shaft 4 can be rotated (brake force released state), and the pinion 6 can be rotated via the torsion spring 2 and the claw 5a. it can.

[0005]

However, the brake mechanism having the above structure has the following problems. FIG.
In the above, stress of each part generated when the window glass f is fully closed (for example, bending of the panel, bending of the main arm e, etc.)
As a result, a rotational force acts on the pinion 6 and the side end A of the claw portion 5 a of the pinion plate 5
Is pressed. In this case, since the contact area between the hook portion 2a of the torsion spring 2 having a circular cross-sectional shape and the claw portion 5a of the pinion plate 5 is small, the contact pressure is increased, and an indentation is formed on the claw portion 5a of the pinion plate 5. You.

When the braking force is released in this state (the window glass is fully closed), the side end 3b of the core 3 presses the hook 2a of the torsion spring 2. Indentations are formed on the claw portions 5a of the pinion plate 5 on the side pressed via the 2a and on the side end portions 3b of the core 3 on the side pressed.

If this is repeated, there is a problem that the claw portion 5a of the pinion plate 5 and the core 3 are destroyed, and a loud noise is generated when the brake is released even before the destruction.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a brake mechanism that prevents breakage of a claw portion and a core of a pinion plate and does not generate abnormal noise when releasing a brake. It is in.

[0009]

According to the present invention for solving the above-mentioned problems, a torsion spring having hook portions at both ends is arranged in a stopper case so as to be pressed against the inner wall of the stopper case, and a notch is formed. A handle shaft-side core is rotatably inserted into the inner wall of the torsion spring, and a pinion plate claw integrally formed with a pinion in a notch space of the core and between hook portions of the torsion spring. In the brake mechanism in which the portion is inserted , one side end of the claw portion of the pinion plate
The tip of the torsion spring is
The depth of the torsion spring is
Line the first notch on the provided diameter or less, the base end side of the side edge of the other side of the pawl portion of the pinion plate, the torsion spray
Possible other hook portion and the engagement of the ring, the depth is provided a second notch than diameter of the torsion spring
It is characterized by the following.

[0010]

[Function] In the brake mechanism of the present invention, the handle shaft side
When the pinion rotates in any direction due to the rotational force from
The core on the handle shaft side is in the claw of the pinion plate
It comes into contact and presses it directly, and the contact area between them
Is large, and indentations are formed on the claw and core of the pinion plate
Not done. The notch depth is the line of the torsion spring.
If the diameter is the same, use the torsion spring hook
There is also transmission of pressing force, but transmission through this hook
The pressing force applied is the pressing force transmitted to the claw of the pinion plate.
Part of the force, its value is small and the pinion plate
No indentations are formed on the claws or the core .

[0011] Each of the phenomena generated when the windowpane is fully closed.
Part stress (for example, panel bending, main arm bending, etc.)
Therefore, a rotational force acts on the pinion and the pinion plate
Of the torsion spring presses the hook of the torsion spring.
Considering the case of pressing, in the brake mechanism of the present invention,
Is notch depth greater than the wire diameter of the torsion spring.
When the window glass is fully closed,
Between the notch (wall) and the hook of the torsion spring
Is the difference between the notch depth and the wire diameter of the torsion spring.
There is a corresponding gap. For this reason, the window glass is fully closed.
Notch depth and wire diameter of torsion spring
Allows the pinion to rotate only by the difference between
When the aforementioned rotational force acts on the nonion, the pinion and the pinion
After rotating the on-plate to eliminate the difference,
The nonion plate contacts the torsion spring hook.
Stop when touched. This return rotation causes the pini
On plate abuts torsion spring hook
At the point when the hook is pressed by the pinion plate
As a result, no indentation is formed on the claw portion of the pinion plate .

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a first embodiment of the present invention, FIG. 2 is a front sectional view in FIG. 1, and FIG. 3 is a plan sectional view in FIG.

1 and 2, a stopper case 2
1, a torsion spring 22 has a stopper case 2
The core 23 has a notch 23a formed inside the torsion spring 22.
Is rotatably inserted. The core 23 is integrally fixed to the handle shaft 24. Further, the core 23
In the space of the notch 23a of the torsion spring 2
Between the two hook portions 22a and 22b, a claw portion 25a of a pinion plate 25 formed integrally with the pinion 26 is inserted and arranged so as to be rotatable about the handle shaft 24. One side of the claw portion 25a of the pinion plate 25
One end of the torsion spring 22
The depth is torsion splicable so that it can engage with the hook 22b.
The first notch 25b larger than the wire diameter of the ring 22 is formed.
At the base end of the other side end of the portion 25a, a torsion spr
The other hook portion 22a of the ring 22 can be engaged with the
Is the second notch 2 which is larger than the wire diameter of the torsion spring 22.
5c is formed. The depth t of these notches 25b and 25c was set in the following relationship.

Wire diameter ≦ t ≦ wire diameter + 0.5 [mm] The pinion plate 25 was made of a sintered metal. Next, the operation of the above configuration will be described with reference to FIG.

When the handle shaft 24 is rotated in the ascending direction, the side end 23 c of the core 23 is connected to the hook portion 22 of the torsion spring 22.
b, the diameter of the torsion spring 22 is reduced, so that the braking force is released. When the handle shaft 24 is further rotated, the side end of the claw portion 25a of the pinion plate 25 is pressed, and the pinion plate 25 rotates. At this time,
The hook portion 22b of the torsion spring 22 is engaged with the first notch 25b.

Similarly, when the handle shaft 24 is rotated in the downward direction, the side end 23b of the core 23 presses the hook 22a of the torsion spring 22, and the diameter of the torsion spring 22 is reduced, so that the braking force is released. . When the handle shaft 24 is further rotated, the side end of the claw portion 25a of the pinion plate 25 is pressed, and the pinion plate 25 rotates. At this time, the hook portion 22a of the torsion spring 22 is engaged with the second notch 25c.

When the window glass is fully closed When the window glass f is fully closed, the rotational force acts on the pinion 26 due to the stress of each part (eg, bending of the panel, bending of the main arm e), and the pinion plate The 25 claw portions 25 a move toward the side end portions 23 b of the core 23.
The movement of the claw portion 25a causes the torsion spring 2 to move.
The second hook portion 22a engages with the second notch 25c of the claw portion 25a.

According to the above configuration, when the brake is released, the hook portions 22a, 22
2b is engaged with the first notch 25b or the second notch 25c of the claw portion 25a of the pinion plate 25, and the side ends 23b and 23c of the core 23 are engaged with the claw portion 2 of the pinion plate 25.
First notch 2 5b of 5a, to press the side edge portions other than the second cut-out 25c. Therefore, since the contact area is large, no indentation is formed on the claw portion 25a of the pinion plate 25 or the core 23.

When the window glass is fully closed,
Notch (wall surface) 25c and torsion spring 22
Between the notch 25c and the hook portion 22a.
There is a gap corresponding to the difference from the wire diameter of the spring 22.
Exist. For this reason, when the window glass is fully closed,
Difference between the depth of 25c and the wire diameter of the torsion spring 22
Only allows the rotation of the pinion 26,
When the aforementioned rotational force acts on the ON 26, the pinion 26 and
And pinion plate 25 rotate to eliminate the above difference
After that, the claw portion 25a of the pinion plate 25 is
At the point of contact with the hook portion 22a of the spring 22
Stop. By this return rotation, the pinion plate 2
5 comes into contact with the hook portion 22a of the torsion spring 22
At the time when the hook portion 2 by the pinion plate 25 is
2a is reduced, and the pinion plate 2
No indentation is formed on the fifth claw portion 25a.

Therefore, the claw portion 25 of the pinion plate 25
a and the core 23 are prevented from being destroyed, and no abnormal noise is generated when the brake is released.

[0021]

[Effect of the Invention] As described above, according to the present invention, the pini
At the tip of one side end of the on-plate claw,
To engage with one hook of the spring
Has a first notch larger than the wire diameter of the torsion spring.
Only, the base end side of the side edge of the other side of the pawl portion of the pinion plate
Can be engaged with the other hook of the torsion spring
In, that by providing the second switching <br/> missing over wire diameter of the torsion spring, to prevent the claw portion and the destruction of the core of the pinion plate, there is no occurrence of abnormal noise at the time of brake release depth A brake mechanism can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a front sectional view of FIG.

FIG. 3 is a plan sectional view in FIG. 1;

FIG. 4 is a configuration diagram of a window regulator.

FIG. 5 is a configuration diagram of a conventional brake mechanism. It is.

FIG. 6 is a front sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Stopper case 22 Torsion spring 22a, 22b Hook 23 Core 23a Notch 23b, 23c Side end 24 Handle shaft 25 Pinion plate 25a Claw 25b, 25c Notch 26 Pinion

Claims (1)

(57) [Scope of request for utility model registration] 1. A torsion spring (22) provided with hook portions (22a, 22b) at both ends thereof is disposed in a stopper case (21) so as to press against the inner wall of the stopper case (2 1 ), and a notch (23a) is provided. Is rotatably inserted into the inner wall of the torsion spring (22) at the side of the handle shaft (24) on which the shaft is engraved, and is inserted into the notch (23a) of the core (23). Hook part (22a, 22b) of torsion spring (22)
In the brake mechanism, a claw (25a) of a pinion plate (25) formed integrally with the pinion (26) is inserted between the claw (25a) of the pinion plate (25).
The torsion spring (2
2) Engageable with one hook portion (22b), the depth is
A first torsion spring (22) having a wire diameter equal to or larger than the wire diameter of the torsion spring (22);
Notch and (25b) provided on the other hand the proximal end side of the side end portions of the pinion plate claw portion (25) (25a), said torsion spring (2
The other hook portion 2) (22a) engageable with the brake depth is characterized in that a second <br/> notch above wire diameter of the torsion spring (22) (25c) mechanism.