JP4351018B2 - Operation device for internal / external air switching damper - Google Patents

Description

  The present invention relates to an operation device for an inside / outside air switching damper for switching between an outside air introduction mode and an inside air circulation mode.

  A conventional configuration of this kind of inside / outside air switching damper operating device will be described with reference to FIG. The first link 1 is provided on the outer surface side of the inside / outside air switching box 2 so as to rotate integrally with the rotation shaft 3. Inside / outside air switching box 2 is provided with a damper (not shown) for switching between inside and outside air so as to rotate integrally with the rotation shaft 3. A second link 4 is provided below the first link 1 so as to be rotatable about a rotation shaft 5, and a guide pin 6 provided at one end of the second link 4 is provided. The first link 1 is movably inserted in the guide groove 7 formed in the first link 1. One end of a cable 9 inserted into the outer tube 8 is connected to the other end of the second link 4. The other end of the cable 9 is connected to an operation lever (not shown) for switching between inside and outside air.

  In the above configuration, when the operating lever is operated to the inside air circulation mode position, the cable 9 is pulled in the direction of the arrow A1, and accordingly, the second link 4 is rotated in the direction of the arrow A2, One link 1 is rotated in the direction of arrow A3. As a result, the damper is rotated in the direction of arrow A3 together with the first link 1, and an outside air inlet (not shown) is closed by the damper (solid line in FIG. 4). reference).

At this time, the guide pin 6 of the second link 4 moves to the position indicated by “A” in FIG. 4 with respect to the guide groove 7, whereby the damper is rotated to a position where the outside air inlet is closed. Then, by moving the guide pin 6 to “B”, the first link 1 and the damper are held in the closed position. Between this “I” and “B” is an idle section.
On the other hand, when the operating lever is operated to the outside air introduction mode position, the cable 9 is pushed in the direction opposite to the arrow A1, and accordingly, the second link 4 is rotated in the direction opposite to the arrow A2. As a result, the first link 1 is rotated in the direction opposite to the arrow A3. As a result, the damper is rotated together with the first link 1 in the direction opposite to the arrow A3. It is closed by a damper (see the two-dot chain line in FIG. 4).

A configuration similar to the conventional configuration is also disclosed in Patent Document 1.
JP-A-5-131839

In the above-described conventional configuration, two links (first link 1 and second link 4) are required between the damper and the cable 9, so that the number of parts is increased and the number of assembly steps is increased. There was a problem of high costs.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an operation device for an inside / outside air switching damper capable of reducing the number of parts and the number of assembling steps, and thus reducing the cost.

In order to achieve the above object, the present invention is for rotating an internal / external air switching damper that selectively closes an internal air introduction port and an external air introduction port,
One link connected to the rotating shaft of the damper so as to rotate integrally therewith,
A cable with one end connected to this link;
An outside air introduction mode position where the other end of the cable is connected and the damper is rotated via the cable and the link, and the inside air introduction port is closed by the damper, and the outside air introduction port An operating member that is operated between an internal air circulation mode position that closes
A first holding concave portion provided corresponding to the outside air introduction mode position, a second holding concave portion provided corresponding to the inside air circulation mode position, and a moderation convex portion provided on the operation member. The moderation convex portion is fitted into the first holding concave portion to hold the operation member at the outside air introduction mode position, and the moderation convex portion is fitted into the second holding concave portion. Holding means for holding the operating member in the room air circulation mode position by combining ,
The outside air introduction mode position of the operating member is set to be a position where the damper is further rotated from a position where the damper closes the inside air introduction port in a direction to press the damper against the inside air introduction port, and the inside air circulation The mode position is set to be a position where the damper is further rotated from a position where the damper closes the outside air introduction port in a direction to press the damper against the outside air introduction port ,
The first holding unit is positioned in the vicinity of the first holding concave portion corresponding to the outside air introduction mode position and in a position where the moderation convex portion passes and the damper closes the internal air introduction port. A moderation concave portion or a slope that is shallower than the concave portion, and a position in the vicinity of the second holding concave portion corresponding to the internal air circulation mode position through which the moderation convex portion passes and the damper is the outside air inlet Is provided at a position for closing, and a moderation recess or a slope shallower than the second holding recess is provided .

  According to the present invention, since the link between the damper and the cable is one, unlike the case requiring two links, the number of parts can be reduced, the number of assembly steps can be reduced, and the cost can be reduced. It becomes possible to reduce. In the present invention, the operation member is held by the holding means at the outside air introduction mode position where the damper closes the inside air introduction port and the inside air circulation mode position where the damper closes the outside air introduction port. It is possible to prevent returning from the closed position where the inside air introduction port and the outside air introduction port are closed to the opening direction.

  Moreover, the outside air introduction mode position of the operation member is set to be a position where the damper is further rotated from the position where the damper closes the inside air introduction port in a direction to press the damper against the inside air introduction port, and the inside air circulation mode position is Since the damper is set so that the damper is further rotated from the position where the outside air introduction port is closed to the direction in which the damper is pressed against the outside air introduction port, the inside air introduction mode is set in the outside air introduction mode, and the inside air circulation mode is set. Each of the outside air inlets can be reliably closed by the damper.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. First, in FIG. 1, an outside air introduction port 12 and an inside air introduction port 13 are formed in the inside / outside air switching box 11 on the air conditioner unit 10 side, and a passage communicating with the outside air introduction port 12 and the inside air introduction port 13 is formed. An evaporator (evaporator) 15 is disposed in the interior 14. Further, inside / outside air switching box 11 is provided with a damper 16 for switching between inside and outside air. The damper 16 is arranged so as to rotate integrally with the rotation shaft 17 as a center, and the outside air introduction port 12 and the inside air introduction port 13 are selectively closed by the rotation. Yes.

  One end of one link 18 is connected to the rotation shaft 17 so as to rotate integrally therewith. One end of a cable 20 inserted into the outer tube 19 is connected to the other end of the link 18. The other end of the cable 20 is connected to a rear end 22a of a lever-shaped operation member 22 provided on the operation unit 21 side. The operation member 22 has a longitudinal intermediate portion provided on the mounting plate 23 so as to be rotatable about the shaft portion 24, and a distal end portion 22 b opposite to the side to which the cable 20 is connected. A knob portion 25 is attached. One end portion of the outer tube 19 is fixed to the mounting plate 23 by a tube fixing portion 19a.

  Further, in the operation member 22, a moderation convex portion 26 protruding downward is integrally provided at a portion between the shaft portion 24 and the tip portion 22b as shown in FIG. In addition, the mounting plate 23 is provided with a circular moderation concave portion 27 located on the left side of FIG. 2, and is located on the left side of the moderation concave portion 27 so as to be deeper than the moderation concave portion 27. A large circular first holding recess 28 is provided. Further, the mounting plate 23 is provided with a circular moderation concave portion 29 positioned on the right side of FIG. 2, and is positioned on the right side of the moderation concave portion 29 so as to be deeper than the moderation concave portion 29. A large circular second retaining recess 30 is provided.

  Here, in a state in which the moderation convex portion 26 of the operation member 22 is fitted in the first holding concave portion 28 on the left side as shown in FIG. 2, the operation member 22 is in the outside air introduction mode position shown by the solid line in FIG. In addition, in a state where the moderation convex portion 26 is fitted in the second holding concave portion 30 on the right side, the operation member 22 is held at the inside air circulation mode position indicated by a two-dot chain line in FIG. A moderation mechanism 31 that selectively holds the operating member 22 at the outside air introduction mode position and the inside air circulation mode position by the moderation convex portion 26 of the operation member 22 and the first and second holding concave portions 28 and 30. This moderation mechanism 31 constitutes a holding means.

  Next, the operation of the above configuration will be described. When the operating member 22 is rotated in the direction of arrow B1 from the inside-air circulation mode position of the two-dot chain line in FIG. 1, the cable 20 is pulled in the direction of arrow B2, and accordingly, the link 18 and the damper 16 cause the rotating shaft 17 to move. It is rotated in the direction of arrow B3 about the center. When the moderation convex portion 26 of the operation member 22 is fitted into the left moderation concave portion 27, the damper 16 is in a state in which the inside air inlet 13 is closed as shown by a solid line in FIG. Then, the operating member 22 is further rotated in the direction of the arrow B1, and the moderation convex portion 26 of the operating member 22 is fitted into the first holding concave portion 28, whereby the operating member 22 is held at the outside air introduction mode position. The

  At this time, the inside of the damper 16 is introduced by rotating the operation member 22 from the position where the moderation convex portion 26 is fitted to the moderation concave portion 27 to the position where the moderation convex portion 26 is fitted to the first holding convex portion 28. A rotating force in the direction of pressing against the mouth 13 is applied. Thereby, the extension of the cable 20 and the elasticity of the damper 16 can be absorbed, and the inside air inlet 13 can be more reliably closed by the damper 16.

In the state where the operation member 22 is held at the left outside air introduction mode position, the inside air introduction port 13 is closed, while the outside air introduction port 12 is opened, so that outside air enters the passage 14 from the outside air introduction port 12. It becomes the outside air introduction mode to be introduced. In this outside air introduction mode, outside air introduced into the passage 14 passes through the evaporator 15 and is then supplied to the inside of the vehicle.
On the other hand, when the operation member 22 is rotated from the state shown by the solid line in FIG. 1 in the direction opposite to the arrow B1, the cable 20 is pushed in the direction opposite to the arrow B2, and the link 18 and the damper 16 are moved accordingly. The rotary shaft 17 is rotated in the opposite direction to the arrow B3. When the moderation convex portion 26 of the operation member 22 is fitted into the right moderation concave portion 29, the damper 16 is in a state in which the outside air inlet 12 is closed as shown by a two-dot chain line in FIG. . Then, the operating member 22 is further rotated in the direction opposite to the arrow B1, and the moderation convex portion 26 of the operating member 22 is fitted into the second holding concave portion 30, so that the operating member 22 is in the inside air circulation mode position. Retained.

At this time, the operation member 22 is rotated from the position where the moderation convex portion 26 is fitted to the moderation concave portion 29 to the position where the moderation convex portion 26 is fitted to the second holding convex portion 30, thereby introducing the outside air into the damper 16. A turning force in the direction of pressing against the mouth 12 acts. Thereby, the outside air inlet 12 can be more reliably closed by the damper 16.
In the state where the operation member 22 is held at the right-side inside air circulation mode position, the outside air introduction port 12 is closed while the inside air introduction port 13 is opened. 14, the inside air circulation mode is introduced. In this inside air circulation mode, the inside air introduced into the passage 14 is supplied to the inside of the vehicle after passing through the evaporator 15.

  According to the first embodiment described above, the following effects can be obtained. First, since the link 18 between the damper 16 and the cable 20 is one, unlike the one requiring two links, the number of parts can be reduced, the number of assembly steps can be reduced, and the cost can be reduced. It becomes possible to do. Further, the operation member 22 is held by the moderation mechanism 31 at the outside air introduction mode position where the damper 16 closes the inside air introduction port 13 and the inside air circulation mode position where the outside air introduction port 12 is closed. Can be prevented from returning from the closed position where the inside air inlet 13 and the outside air inlet 12 are closed.

  In addition, the outside air introduction mode position of the operating member 22 is set so as to be a position where the damper 16 is further rotated from the position at which the inside air introduction port 13 is closed to the direction in which the damper 16 is pressed against the inside air introduction port 13. The circulation mode position is set so as to be a position where the damper 16 is further rotated from a position where the damper 16 closes the outside air introduction port 12 in a direction to press the damper 16 against the outside air introduction port 12. Therefore, in the outside air introduction mode, the inside air introduction mode is set. The mouth 13 and the outside air introduction port 2 can be reliably closed by the damper 16 in the inside air circulation mode.

FIG. 3 shows a second embodiment of the present invention. This second embodiment differs from the first embodiment described above in the following points. That is, a slope 35 that rises to the right is provided on the right side of the first holding recess 28 in place of the moderation recess 27, and the left side of the second holding recess 30 is raised to the left instead of the moderation recess 29. The slope 36 is provided.
Also in the second embodiment having such a configuration, the same effects as those of the first embodiment can be obtained.

  The present invention is not limited to the above-described embodiment. For example, the operation member 22 may be a dial type instead of a lever-shaped one.

1 is a schematic configuration diagram showing a first embodiment of the present invention. Longitudinal front view of moderation mechanism Vertical front view of holding recess portion showing second embodiment of the present invention Configuration diagram showing the link mechanism part of the conventional configuration

Explanation of symbols

In the drawing, 11 is an inside / outside air switching box, 12 is an outside air introduction port, 13 is an inside air introduction port, 16 is a damper, 17 is a rotating shaft, 18 is a link, 19 is an outer tube, 20 is a cable, 22 is an operating member, 26 is a moderation convex portion, 27 is a moderation concave portion, 28 is a first holding concave portion, 29 is a moderation concave portion, 30 is a second holding concave portion, 31 is a moderation mechanism (holding means), and 35 and 36 are Indicates a slope.

Claims (1)

For rotating a damper for switching between inside and outside air that selectively closes the inside air introduction port and the outside air introduction port,
One link connected to the rotating shaft of the damper so as to rotate integrally therewith,
A cable with one end connected to this link;
An outside air introduction mode position where the other end of the cable is connected and the damper is rotated via the cable and the link, and the inside air introduction port is closed by the damper, and the outside air introduction port An operating member that is operated between an internal air circulation mode position that closes
A first holding concave portion provided corresponding to the outside air introduction mode position, a second holding concave portion provided corresponding to the inside air circulation mode position, and a moderation convex portion provided on the operation member. The moderation convex portion is fitted into the first holding concave portion to hold the operation member at the outside air introduction mode position, and the moderation convex portion is fitted into the second holding concave portion. Holding means for holding the operating member in the room air circulation mode position by combining ,
The outside air introduction mode position of the operating member is set to be a position where the damper is further rotated from a position where the damper closes the inside air introduction port in a direction to press the damper against the inside air introduction port, and the inside air circulation The mode position is set to be a position where the damper is further rotated from a position where the damper closes the outside air introduction port in a direction to press the damper against the outside air introduction port ,
The first holding unit is positioned in the vicinity of the first holding concave portion corresponding to the outside air introduction mode position and in a position where the moderation convex portion passes and the damper closes the internal air introduction port. A moderation concave portion or a slope that is shallower than the concave portion, and a position in the vicinity of the second holding concave portion corresponding to the internal air circulation mode position through which the moderation convex portion passes and the damper is the outside air inlet The operation device for the inside / outside air switching damper is provided with a moderation concave portion or a slope shallower than the second holding concave portion in a closed position .

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