JPH0574729B2 - - 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 or 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 h The brake mechanism shown in FIG. 4 is conventionally known as a brake mechanism used in this wind regulator.

In this brake mechanism, a plurality of torsion springs 2 are arranged in a stopper case 1 so as to press against the inner wall of the stopper case 1, and a core 3 with a notch 3a carved inside the torsion spring 2 is rotatable. is inserted into. Further, this core 3 is integrally fixed to the handle shaft 4. Furthermore, within the space of the notch 3a of the core 3, the hook portion 2 of the plurality of turns of the torsion spring 2 is inserted.
Between a and 2b is a pinion (pinion b in Figure 3).
equivalent) and a stopper plate 5 integrally formed with
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,
Since the side end portion 5b or 5c of the claw portion 5a pushes the hook portion 2a or 2b of the torsion spring 2 and acts to widen the outer diameter of the torsion spring 2, the pressure contact force between the torsion spring 2 and the housing 1 is increased. becomes stronger and prevents the pinion from rotating. 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, so the pressure contact force 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.

(Problems to be Solved by the Invention) By the way, in this type of brake mechanism, the hook portion 2a of the torsion spring 2 with multiple turns,
The gap between 2b and the side ends 3b, 3c of the core 3 is preferably as small as possible since it causes looseness in the core 3 and the handle shaft 4. However, due to problems with the machining accuracy of each part, designs tend to create gaps. This is because if the side ends 3b and 3c of the core 3 are assembled in such a way that the hook parts 2a and 2b of the multi-turn torsion spring 2 are even slightly wrapped around them, the braking force will decrease and the performance of the brake mechanism will deteriorate. This is because it deteriorates. For this reason, the conventional brake mechanism had a problem in that there was backlash (play) in the core 3 and the handle shaft 4.

Further, in this brake mechanism, after the hook portion 2a or 2b of the multi-turn torsion spring 2 is wound a certain amount, transmission of rotation from the handle shaft 4 side to the pinion 6 side starts. Therefore, mechanically, a gap corresponding to this amount of winding is created between the pawl portion 5a of the pinion 5 and the hook portion 2 of the torsion spring 2.
a and 2b, but in reality, a gap larger than the gap corresponding to the above-mentioned amount of winding is provided to absorb product processing errors. By the way, this gap causes play in the rotational direction of the pinion 6 and also large play in the driven gear that meshes with the pinion 6, which worsens the operating feeling and causes the glass to come down with a clatter when the glass is lowered. . This problem occurs because the weight of the glass is greater than the resistance of the glass run or waist molding that slides against the glass, and the glass tends to fall under its own weight.
That is, the glass lowering operation is performed using the handle shaft 5 and the core 3.
This is done by rotating clockwise in FIG. 4, and the rotational speed at this time is usually approximately constant. On the other hand, the claw part 5a, which rotates based on the fall of the glass by its own weight, starts rotating clockwise in FIG. Its speed increases with time. Therefore, immediately after the hook portion 2b starts rotating clockwise after the glass is lowered by operating the handle, a gap is created between the hook portion 2b and the claw portion 5a (side end 5c), but gradually As the rotational speed of the claw portion 5a increases, the claw portion 5a collides with the hook portion 2b. Due to the reaction of this collision, the claw portion 5a lags behind the hook portion 2b, and a gap is again created between the two. However, the claw portion 5a catches up again and collides with the hook portion 2b. Thereafter, similar operations are repeated until the steering wheel operation is completed.
Since this movement of the claw portion 5a is transmitted to the glass via the link or the like, the glass lowers with a clatter and the operational feeling is also deteriorated due to the impact caused by the collision.

Furthermore, the lifting operation force and the lowering operation force in the wind regulator are naturally different when a balance spring is not provided. In a wind regulator that does not include a balance spring to reduce costs, it is preferable to eliminate this imbalance within the brake mechanism.

The present invention has been made in view of the above points, and its objectives are to eliminate play in the core and handle shaft, eliminate the aforementioned negative effects due to play in the pinion, and furthermore, The objective is to realize a brake mechanism that can eliminate the imbalance of operating force.

(Means for Solving the Problems) The present invention solves the above problems by arranging a plurality of turns of torsion springs in a stopper case so as to be in pressure contact with the inner wall of the stopper case. A core is rotatably inserted into the inner wall of the plurality of turns of the torsion spring, and is formed integrally with the pinion within the notch space of the core and between the hook parts of the plurality of turns of the torsion spring. In the brake mechanism in which the claw portion of the stopper plate is inserted, approximately one turn of the torsion spring is arranged in parallel to the plurality of turns of the torsion spring so as to be in pressure contact with the inner wall of the stopper case, and the hook portion of one of the torsion springs is attached to the core. At the same time, the other hook portion of the approximately one turn torsion spring is engaged with the side end portion of the claw portion of the stopper plate that faces one side end portion of the core. This feature is characterized in that it allows the user to

(Function) In the brake mechanism of the present invention, by the action of approximately one turn of the torsion spring, one hook part of the plurality of turns of the torsion spring is elastically sandwiched between the core and the claw part from both sides. Therefore, both the core and the claw part will not be loose. Further, since the claw portion is pressed against one hook portion of the plurality of torsion springs when the glass is lowered, the situation where the claw portion repeatedly collides with each other does not occur. Furthermore, since approximately one turn of the torsion spring is pressed against the stopper case, the operating force becomes unbalanced depending on the direction of rotation of the core. Therefore, by utilizing this, it is possible to eliminate the unbalance of the lifting/lowering operating force in the wind regulator.

(Example) Hereinafter, an example of the present invention will be described in detail using FIGS. 1 and 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, 7 is a torsion spring with approximately one turn (hereinafter simply referred to as one turn) that is arranged in parallel with the plurality of torsion springs 2, and similarly to the plurality of torsion springs 2, a stopper case 7 is provided.
is arranged so as to be in pressure contact with the inner wall of the and,
One hook portion 7a is connected to one side end 3 of the core 3.
b, and the other hook portion 7a engages with the side end portion 3b.
The side end portion 5b of the claw portion 5a is engaged with the side end portion 5b of the claw portion 5a. It should be noted that molding the one-turn torsion spring 7 is extremely easy compared to the multi-turn torsion spring 2. 5b can be made extremely small.

According to such a configuration, in a static state where the handle is not operated, the core 3 is sandwiched between the hook portion 2b of the multi-turn torsion spring 2 and the hook portion 7a of the one-turn torsion spring 7. , no rattling occurs. Further, since the claw portion 5a is also sandwiched between the hook portion 2b of the plurality of turns of the torsion spring 2 and the hook portion 7b of the one turn of the torsion spring 7, no backlash occurs in the same way.

On the other hand, the operation in a dynamic state where the steering wheel is operated is as follows. First, when the glass is raised by operating the handle, the core 3 is rotated counterclockwise in FIG. Hook portions 2b, 7b of shock springs 2, 7
When winding up multiple turns of the torsion spring 2 alone, the winding amount at which the tail end (hook part 2a) of the torsion spring 2 starts moving is set as θ ₁ . When rising, the operating force at the position where the multi-turn and single-turn torsion springs 2 and 7 are wound up by θ ₁ (including the operating force to rotate the claw portion 5a as a load)
is the handle operating force required to keep the glass rising. Incidentally, during the rise, the glass starts rising in synchronization with the rotation of the core 3. In contrast,
When lowering the glass, the core 3 is rotated clockwise in _FIG . ) The hook portion 7a of the torsion spring 7 with one turn is wound up (the hook portion 7b is stationary), and then the plurality of turns and the one turn of the torsion springs 2 and 7 are wound up at the same time. However, in this winding, the winding amount is θ ₂ +
Even when the temperature reaches θ ₁ , the rear end (hook portion 2b) of the multiple-turn torsion spring 2 does not start moving, and the glass does not start lowering. This is because the force generated by winding the one-turn torsion spring 7 by θ ₂ +θ ₁ is applied to the hook portion 2b of the plural-turn torsion spring 2 in the direction of increasing the braking force. Therefore, unless the glass is further rolled up by _θ3 , the hook portion 2b will not start moving and the glass will not start lowering. That is, the operating force required for winding up θ ₂ +θ ₁ +θ ₃ becomes the handle operating force required for lowering. Therefore, if the one-turn torsion spring 7 is set so that the handle operating force during the upward and downward movements is equal, the unbalance of the handle operating force can be resolved.

Further, when the glass is lowered, the claw portion 5a is forcibly pressed against the hook portion 2b by the action of the one-turn torsion spring 7, so that the glass does not lower with a rattling motion as in the conventional device. , the problem of operational feeling is also solved.

By adopting the above structure, the influence on the brake mechanism in terms of external shape, weight, and cost is only the addition of one turn of torsion spring, and can be almost ignored. Furthermore, the present invention is not limited to the type of wind regulator shown in FIG.
It is also applicable to other types, such as a single arm type or a simple X arm type.

(Effects of the Invention) As explained above, according to the present invention, by the action of the torsion spring having approximately one turn, the core and the claw part elastically touch one hook part of the torsion spring having multiple turns from both sides. Because it will interfere with
Both the core and the claw part will no longer be loose. or,
Since the claw portion is pressed against one hook portion of the plurality of torsion springs when the glass is lowered, the situation where the claw portion repeatedly collides with each other does not occur. Furthermore, since approximately one turn of the torsion spring is pressed against the stopper case, the operating force becomes unbalanced depending on the direction of rotation of the core. Therefore,
Use this to raise the wind regulator.
Can eliminate imbalance in descending operation force.

[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...Stopper case, 2...Multi-turn torsion spring, 2a, 2b...Hook portion, 3...Core,
3a...notch, 3b, 3c...side end, 4...handle shaft, 5...stopper plate, 5a...claw, 5b,
5c...Side end portion, 6...Pinion, 7...1-turn torsion spring, 7a, 7b...Hook portion.

Claims (1)

[Claims] 1. Arranging a plurality of turns of a torsion spring in a stopper case so as to press against the inner wall of the stopper case, and rotatably inserting a core on the handle shaft side having a cutout into the inner wall of the plurality of turns of the torsion spring, In the brake mechanism, a pawl portion of a stopper plate integrally formed with a pinion is inserted between the hook portions of the plurality of turns of the torsion spring in the space of the notch of the core, and is pressed against the inner wall of the stopper case. As shown in FIG.
A brake mechanism characterized in that the other hook portion of the torsion spring having approximately one turn is engaged with a side end portion of a pawl portion of the stopper plate that faces one side end portion of the core. .