JP2525007Y2 - Driving force transmission 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 driving force transmitting mechanism for rotating various doors of a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a driving force transmitting mechanism for rotating a door of a vehicle air conditioner of this type, for example, the one disclosed in Japanese Utility Model Laid-Open No. 61-78712 is known.

In this prior art, an operating pin is provided at the tip of a drive link driven by an actuator, and an elongated hole is formed in a rotary link fixedly mounted on a rotation shaft of a door as a driven part. The rotation of the rotation link is caused by the movement of the operating pin that slides in the elongated hole by the drive of the motor, and the door is moved by the rotation of the rotation link.

[0004] One or both of the operating pin and the rotating link are made of a magnetic material so that the magnetic force prevents rattling between the operating pin and the elongated hole formed in the rotating link. Was.

[0005]

In a link mechanism having a general structure, in order to improve the operability of an actuator, a groove width of a guide groove for sliding an operation pin is set to be larger than a diameter of the operation pin. Although a slight gap is provided between the operating pin engaged in the guide groove and the operating pin is loosely fitted in the guide groove, rattling occurs due to the gap between the operating pin and the guide groove. For this reason, there is a problem that vibration is generated according to rattling of the link mechanism due to inertial force or the like of the door driven through the link mechanism, and noise is generated.

At present, in order to solve the above problems, urethane or the like is interposed between the operating pin and the guide groove to increase the sliding resistance or to eliminate the gap between the guide groove and the operating pin. However, these are likely to cause a state in which the operating pins are strongly pressed into the guide grooves due to variations in manufacturing of parts, and the operation of the link mechanism may be awkward. is not.

On the other hand, in the above prior art, rattling between the operating pin and the guide groove can be prevented to some extent by the action of the magnetic force. However, when the operating pin slides in the guide groove, the metal powder is peeled off and the guide groove is removed. In addition, since the linking is performed by magnetic force while adhering to the inside, the sliding resistance of the operating pin is increased due to the action of the attached metal powder and the magnetic force, and the driving efficiency is poor. Further, since metal is used, there is a problem that the weight is heavy and the number of parts is large.

In view of the above problems, the present invention eliminates rattling between the operating pin and the guide groove, and the operating pin slides efficiently in the guide groove, thereby improving the operating performance of the link mechanism. It is an object of the present invention to provide a driving force transmission mechanism.

[0009]

In order to achieve the above object, a driving force transmission mechanism according to the present invention includes a driving lever driven by an actuator and a driving lever slidably inserted into a guide groove formed in the driving lever. In a drive transmission mechanism comprising a driven lever having an operating pin to be engaged, a groove width of the guide groove is set to be equal to or less than a diameter of the operation pin, and a long hole is provided near a side of the guide groove. In parallel.

[0010]

Therefore, there is no gap between the guide pin having a groove width set to be smaller than the diameter of the working pin and the working pin, but the guide groove is provided with an elastic force by a parallel slot. It is coupled to the operating pin by an appropriate elastic force. For this reason, the operating pin can slide while the groove width of the guide groove is enlarged, thereby solving the above-mentioned problem.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a driving force transmitting mechanism used in, for example, a vehicle air conditioner. The driving force transmitting mechanism includes a driving lever 1 driven by an actuator (not shown) and a driving lever 1 1 is basically constituted by a driven lever 12 for transmitting a driving force to a door (for example, an air mixing door) 2 as a driven portion.

The drive lever 1 is formed of an elastic member having an elastic force such as resin, and a rotary shaft 5 of an actuator (not shown) is fitted to one end of the drive lever 1. The drive lever 1 is rotated about the rotary shaft 5 by the actuator. Is done. A guide groove 10 is provided on the other end of the drive lever 1 whose width is widened.
And elongated holes 14a, 14b for varying the width of the guide groove 10.
And are drilled.

The guide groove 10 changes the movement position of the operation pin 13 (the rotation locus of the operation pin 13 about the rotation shaft 11 of the door 2 as a rotation center) according to the rotation angle of the drive lever 1. Is formed in a substantially S-shape so as to obtain a predetermined rotation locus, and the operating pin 13 slides along the substantially S-shaped groove. The width of the guide groove 10 is set to be equal to or less than the diameter of the operation pin 13 so that no gap is generated between the connection with the operation pin 13.

In this embodiment, for example, as shown in FIGS. 2 and 3, the width of the groove at both ends of the guide groove 10 is substantially the same as the diameter of the operating pin 13 (the guide groove 10 and the operating pin 13
The gap width is set to L so that the backlash is about 0 mm), and the groove width in the vicinity of the center, which is a range in which it is desired to eliminate backlash, is set to be a dimension M (L> M) smaller than the groove width L by the protrusion 15. You may. In this case, it is desirable to use line contact for measures against the occurrence of shear.

The operating pin 13 is slidably engaged in the guide groove 10, and by moving in the guide groove 10, a driving force due to the movement is rotated via the driven lever 12 to rotate the door 2. It has the function of transmitting to the shaft 11. That is, when the drive lever 1 is rotated and the position of the guide groove 10 changes, the operation pin 13 slides in the guide groove 10 following the movement locus of the guide groove 10, and the operation pin 13
Is transmitted to the rotation shaft 11 of the door 2 via the driven lever 12, whereby the door 2 is rotated.

The elongated holes 14a and 14b change the groove width of the guide groove 10 along the sliding of the operating pin 13, and in this embodiment, the guide grooves 10 of the guide groove 10 having a narrow groove width are set. It is formed near both sides near the center. Specifically, when the operating pin 13 reaches the vicinity of the center of the guide groove 10 whose groove width is set to be narrow, the slots 14a, 14b are appropriately reduced by the force of the operating pin 13 pressing the guide groove 10 in the width direction. The groove width of the guide groove 10 in contact with the operation pin 13 is increased to a predetermined width by reducing the length of the elongated holes 14a and 14b. The reduction of the long holes 14a and 14b is achieved by the fact that the drive lever 1 as a guide portion in which the long holes 14a and 14b are formed is formed of an elastic member. It is designed to be joined without any gap by a resilient force.

In the driving force transmission mechanism having the above structure, when the drive lever 1 is rotated in the direction A by, for example, driving of the actuator, the position of the guide groove 10 changes in accordance with the rotation, and the movement trajectory of the guide groove 10 Guide groove 1
The operating pin 13 slides in the inside 0, and the movement of the operating pin 13 causes the door 2 to rotate in the B direction via the driven lever 11. When the drive lever 1 is rotated in the anti-A direction, the door 2 is rotated in the anti-B direction.

However, in this driving force transmitting mechanism, as described above, the width of the guide groove 10 is
And the groove width of the guide groove 10 is appropriately changed by sliding the operation pin 13, so that there is no gap between the operation pin 13 and the guide groove 10 by an appropriate elastic force. As a result, the operation pin 13 can slide smoothly in the guide groove 10 without rattling.

[0020]

[Effect of the invention] As described above, according to the invention,
Since the groove width of the guide groove can be changed as appropriate, the working pin and the guide groove are connected by an appropriate elastic force without a gap, whereby the working pin slides smoothly in the guide groove without rattling. Accordingly, it is possible to provide a driving force transmission mechanism having high driving efficiency and high operation performance.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a driving force transmission mechanism of a vehicle air conditioner.

FIG. 2 is an enlarged view of a main part.

FIG. 3 is a sectional view taken along line II of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive lever 2 Door 10 Guide groove 11 Rotary shaft 12 Follower lever 13 Operating pin 14a, 14b Slot

Claims (1)

(57) [Scope of request for utility model registration] 1. A drive transmission mechanism comprising: a drive lever driven by an actuator; and a driven lever having an operating pin slidably engaged in a guide groove formed in the drive lever. A driving force transmitting mechanism, wherein a groove width is set to be equal to or less than a diameter of the operating pin, and a long hole is juxtaposed near a side of the guide groove.