JP2000322141A - Operation lever device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of an operation lever by eliminating the necessity of packing for taking measures to prevent noises due to the play of a pin in a curvature steeply changing part. SOLUTION: An elastic mechanism 22 allowed to be elastically deformed is integrally formed on one lever 2, and in the case of moving a pin 11 to the steeply changing parts 211a, 212a, the mechanism 22 is abutted on an abutting part 12 and deformed during a period from time before the contact of the pin 11 with steeply changing parts 211a, 212a up to the contact with the steeply changing parts 211a, 212a and the pin 11 is energized to the sliding surface 212 of a cam groove 21 by the restoration force of the mechanism 22. When the pin 11 approaches the steeply changing parts 211a, 212a, the pin 11 is moved while being pressed to the sliding surface 212 of the cam groove 21, so that the generation of noise due to the play of the pin 11 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating lever device in which a pin slides in a cam groove and two levers are rotated in a predetermined positional relationship. Switching door or the like).

[0002]

2. Description of the Related Art In an operating lever device, a pin provided on a driving lever is inserted into a cam groove formed in a driven lever, and the pin slides on a sliding surface of the cam groove as the driving lever rotates. The lever is turned. Further, the shape of the cam groove is set so that the rotation angle of the driven lever with respect to the rotation angle of the drive lever has a predetermined relationship. In order to obtain the above-mentioned predetermined relationship, the curvature suddenly changes in the middle of the cam groove. Often, suddenly changing parts are formed.

When the drive lever rotates and the pin approaches the suddenly changing portion of the cam groove, the pin rattles in the cam groove and collides with the sliding surface of the cam groove to generate abnormal noise. Therefore, conventionally, a cylindrical packing made of an elastic body is put on the outer periphery of the pin to prevent generation of abnormal noise.

[0004]

However, in the conventional apparatus, since packing is used for countermeasures for abnormal noise, the number of parts and the number of assembling steps are increased, and the cost is also increased. The present invention has been made in view of the above points, and eliminates the need for packing for noise suppression.
An object of the present invention is to reduce the number of parts and the number of assembling steps, and hence the cost.

[0005]

In order to achieve the above object, according to the first to third aspects of the present invention, the curvature suddenly changing portion (21) is provided.
An operation lever configured such that the pin (11) slides in the cam groove (21) formed with 1a, 212a) and the two levers (1, 2) are rotated in a predetermined positional relationship. In the device, one of the two levers (2)
An elastic mechanism (22) capable of elastic deformation is integrally formed, and
One of the two levers (1) has an elastic mechanism (2
A contact portion (12) for contacting the pin (1) is formed.
When (1) moves toward the suddenly changing part (211a, 212a), the pin (11) is moved to the suddenly changing part (211a, 212a).
Suddenly changing part (211a, 212a) from the time before contact with
Until the elastic mechanism (22) contacts the contact portion (1).
It is characterized in that the pin (11) is deformed by abutting with 2) and is urged against the sliding surface (212) of the cam groove (21) by the restoring force of the elastic mechanism (22).

[0006] According to this, the pin (11) is suddenly changed (2).
11a, 212a), the elastic mechanism (2
Since the pin (11) is pressed against the sliding surface (212) of the cam groove (21) by the restoring force of 2) and moves, it is possible to prevent generation of abnormal noise due to rattling of the pin (11). . Moreover, a separate part (packing) for countermeasures for abnormal noise as in the conventional apparatus is unnecessary, and therefore, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

Preferably, the elastic mechanism (22) has a plate shape. According to the third aspect of the present invention, the lever (2) having the elastic mechanism (22) is made of resin, whereby the elastic mechanism (22) can be easily integrally formed. .

[0008] The reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiments described later.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. 1 to 3 show an embodiment of the present invention, which includes a drive lever 1 and a driven lever 2 formed of a resin (for example, polypropylene) having excellent mechanical strength and abrasion resistance.

The drive lever 1 is formed at one end thereof with a shaft hole 10 into which a rotary shaft of a servo motor (not shown) is inserted. The drive lever 1 is driven by the servo motor to rotate about the shaft hole 10. Has become. On the other end side of the drive lever 1, a columnar pin 11 and an arc-shaped contact portion 12 are formed on the upper surface side in FIG. The driven lever 2 is rotatable around a fulcrum 20 at one end, and a cam groove 21 is formed from near the center to the other end. The pin 11 of the drive lever 1 is slidably inserted into the cam groove 21.
The shape of the cam groove 21 is set so that the driven lever 2 is rotated by sliding inside, and the rotation angle of the driven lever 2 with respect to the rotation angle of the drive lever 1 has a predetermined relationship. Have been.

The driven lever 2 is integrally formed with a plate-shaped elastic piece (elastic mechanism) 22 extending from the vicinity of the center toward the other end, and the elastic piece 22 has a thickness t of about 1 mm. It is easily deformable. A protruding piece 22a protruding toward the drive lever 1 is formed at a free end of the elastic piece 22. The protruding piece 22a can contact the contact portion 12 within a predetermined rotation range of the drive lever 1. It has become. .

The cam groove 21 has, as sliding surfaces on which the pin 11 slides, a first sliding surface 211 on the elastic piece 22 side and a second sliding surface 212 on the anti-elastic piece 22 side. Sliding surface 211,
In the middle part of 212, a sudden change portion 211a where the curvature suddenly changes,
212a are formed. On one end side of the driven lever 2, a shaft portion 23 having a substantially cylindrical shape and a partially cut-out portion is provided.
Are formed, and a plurality of elastic projection pieces 2 are formed around the shaft portion 23.
4 are formed. Then, by fitting the elastic projection pieces 24 into the mounting holes of the case of the air conditioner (not shown),
The driven lever 2 is rotatably attached to the case. Further, a door (not shown) of an air conditioner (a mode switching door, an air mixing door, etc.) is attached to the shaft portion 23.

Next, the operation of the above embodiment will be described. In FIG. 2, when the drive lever 1 is rotated counterclockwise by the servo motor, the pin 11 moves in the cam groove 21 and the driven lever 2 is rotated clockwise, while the drive lever 1 is rotated clockwise. When rotated clockwise, the driven lever 2 is rotated counterclockwise, and the door of the air conditioner is rotated together with the driven lever 2.

The drive lever 1 and the driven lever 2 rotate between a solid line position (start point position) and a dashed line position (end point position) in FIG. , 212a. Also,
At the starting point position, the protruding piece 22a of the elastic piece 22 abuts on the contact portion 12, and the elastic piece 22 is elastically deformed. The elastic force of the elastic piece 22 generated by this elastic deformation causes the pin 11 to move to the second position of the cam groove 21. It is pressed against the sliding surface 212.

When the drive lever 1 is rotated in the counterclockwise direction in FIG. 2, the projecting piece 22a and the abutting portion 12 are not connected until the pin 11 reaches the middle of the suddenly changing portions 211a and 212a from the starting point. The contact state continues, and the state where the pin 11 is pressed against the second sliding surface 212 is maintained. Therefore, in the vicinity of the suddenly changing portions 211a and 212a, the pin 11 is moved by being pressed against the second sliding surface 212.
1 is prevented, and generation of abnormal noise is prevented.

In the present embodiment, since the generation of abnormal noise can be prevented by the elastic piece 22 formed integrally with the driven lever 2, a separate component (packing) for countermeasures against abnormal noise as in the conventional device is unnecessary. Therefore, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced. (Other Embodiments) In the above embodiment, the contact state between the protruding piece 22a and the contact portion 12 is continued until the pin 11 reaches the intermediate position of the sudden change portion 212a from the starting point position. However, by extending the protruding piece 22a to the fulcrum 20 side,
For example, the abutting state of the abutting portion 12 may be continued at the suddenly changing portion 212a and before and after the suddenly changing portion 212a.

According to this, regardless of the direction in which the drive lever 1 rotates, the pin 11 is not
Before approaching 12a, the pin 11 is pressed against the second sliding surface 212 by the elastic force of the elastic piece 22.
In any rotational direction, the rattling of the pin 11 is prevented,
The generation of abnormal noise is prevented. In the above embodiment, the drive lever 1 is driven by a servomotor. However, the drive lever 1 can be manually operated via a cable connected to an intermediate portion of the drive lever 1.

Alternatively, the pin 11 may be formed of metal, and the pin 11 may be press-fitted or insert-molded into the drive lever 1 made of resin. The present invention is also applicable to uses other than the vehicle air conditioner.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

FIG. 2 is a view as viewed from A in FIG.

FIG. 3 is a perspective view of a driven lever of FIG. 1;

[Explanation of symbols]

1, 2, lever, 11 pin, 12 contact part, 21 cam groove, 212 sliding surface, 211a, 212a sudden change part,
22 ... elastic piece (elastic mechanism).

Claims (3)

[Claims] 1. A lever (2) having a cam groove (21).
And a lever (1) having a pin (11) that slides in the cam groove (21), and abruptly changing portions (211a, 212a) where the curvature changes suddenly are formed in the middle of the cam groove (21). An operation lever device configured such that the pin (11) slides in the cam groove (21) and the levers (1, 2) are rotated in a predetermined positional relationship. An elastic mechanism (22) that can be elastically deformed is integrally formed on one of the levers (2), and the elastic mechanism (22) comes into contact with the other lever (1) of the two levers. A contact portion (12) is formed, and the pin (11) is connected to the suddenly changing portion (211a, 212a).
When the pin (11) moves toward, the elastic mechanism (22) extends from the time before the pin (11) comes into contact with the suddenly changing part (211a, 212a) until it comes into contact with the suddenly changing part (211a, 212a). Is deformed by contacting the contact portion (12), and the pin (11) is urged against the sliding surface (212) of the cam groove (21) by the restoring force of the elastic mechanism (22). An operating lever device characterized in that the operating lever device is configured as described above. 2. The operating lever device according to claim 1, wherein the elastic mechanism is plate-shaped. 3. The operating lever device according to claim 1, wherein the lever (2) on which the elastic mechanism (22) is formed is made of resin.