JP2006290125A - Mode changeover mechanism of air-conditioner for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mode changeover mechanism for an automobile air-conditioner free of emission of striking sounds when the pin engagement of a link member is changed over. <P>SOLUTION: The mode changeover mechanism 4 of the air-conditioner for automobile is equipped with a link member 5 supported rotatably on an air-conditioner case 2, a lever 6 supported capable of shifting the rotating position of a door 3a, a first 10 and a second pin 11 mounted on the link member 5, and a first 12 and a second pin engagement part 13 provided on the lever 6 and admitting selective engagement of the first 10 and second pins 11 according to the rotating position of the lever 6, and arranged so that changing-over of the engaging condition is made in the rotating process of the link member 5 from the condition in which the first pin 10 is engaged with the first pin engagement part 12 to the condition in which the second pin 11 is engaged with the second pin engagement part 13, wherein at the starting end of engagement of the second pin engagement part 13, a deflecting engagement part 14 is provided to make a deflecting deformation when the second pin 11 bumps thereto. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mode switching mechanism of an automotive air conditioner that switches a distribution state of conditioned air.

  Various types of doors such as a differential door, a vent door, and a foot door are provided in the air conditioner for automobiles in order to distribute air-conditioned air. These doors are switched to a predetermined position by a mode switching mechanism in accordance with an air distribution mode (for example, vent mode, bi-level mode, foot mode, differential-foot mode, differential mode).

  As a conventional mode switching mechanism, it has a main link member that is rotated by a control cable, a branch link member that rotates in conjunction with the rotation of the main link member, and a plurality of levers supported by each door, Each pin provided on the main link member and the branch link member is engaged with a pin engaging portion provided on each lever.

  When the air distribution mode is changed, the rotation positions of the main link member and the branch link member are changed via the control cable, and the rotation positions of the levers are changed in accordance with the rotation positions of the link members, so that each door is predetermined. (See Patent Document 1).

  By the way, in such a mode switching mechanism, in order to reduce the installation space of the link member and the lever, it is conceivable to provide a plurality of pins and a plurality of pin engaging portions respectively on the link member and the lever. That is, in a partial range of the link member, the rotation of the lever is controlled by engaging only one pin and the pin engagement state, and in the other partial range of the link member, only between the other pin and the pin engagement portion. The lever is controlled in the engaged state.

With this configuration, it is not necessary to set the pin engaging portion of the lever over the entire movement range of each pin of the link member, and the lever area can be reduced. As the air-conditioning air distribution mode increases, the number of links between the link members and the levers increases and the pin engagement structure becomes more complicated. Therefore, the necessity for reducing the installation space increases.
Japanese Utility Model Publication No. 5-84513

  However, when, for example, the first pin of the link member is disengaged from the first pin engaging portion of the lever and the second pin is engaged with the second pin engaging portion, the relative relationship between the first pin and the first pin engaging portion is The second pin hits the second pin engaging portion when the second pin engages with the second pin engaging portion due to the position variation or the repulsive force of the door packing at the moment when the first pin is released. There is a problem that occurs.

  Then, an object of this invention is to provide the mode switching mechanism of the air conditioning apparatus for motor vehicles which does not generate | occur | produce a hitting sound when the engagement of the pin of a link member switches.

  The invention of claim 1, which achieves the above object, includes a link member that is rotatably supported by a base member, a lever that is rotatably supported by a rotational position of a door, and a plurality of pins provided on the link member; A plurality of pin engaging portions, each of which is provided on the lever, and each of the plurality of pins is selectively engaged according to a rotation position of the lever, and in the process of rotating the link member, A mode switching mechanism of an automotive air conditioner that is switched from an engaged state that engages with one pin engaging portion to an engaged state in which the other one pin engages with the other one pin engaging portion. And the bending engagement part which bends and deform | transforms when said other one pin collides is provided in the engagement start end of said another one pin engagement part, It is characterized by the above-mentioned.

  According to the first aspect of the present invention, when the engagement state is switched from one pin to the other pin of the link member, the relative position variation between the one pin and the pin engaging portion and the one pin are not. Even if the other pin strongly hits against the flexing engagement part of the other pin engaging part due to the repulsive force of the door packing at the moment of disengagement, the flexing engaging part bends and deforms due to the contact force of the other pin. And absorb the impact force. Accordingly, no hitting sound is generated when the engagement of the pins of the link member is switched.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 5 show an embodiment of the present invention, FIG. 1 is a side view of an air conditioning unit 1 of an automotive air conditioner, and FIG. 2 is a mode switch in a state in which a second pin 11 hits a deflection deformation portion 14. 3 is a partial front view of the mechanism 4, FIG. 3 is a partial front view of the mode switching mechanism 4 in a state in which the bending deformation portion 14 is bent by the abutment of the second pin 11, and FIG. 4 is a drawing in which the second pin 11 is the bending deformation portion 14. FIG. 5 is a partial front view of the mode switching mechanism 4 in a state where the first pin 10 is disengaged from the first pin engaging portion 12 and the second pin 11 is FIG. 6 is a partial front view of the mode switching mechanism 4 in a state where engagement with the second pin engaging portion 13 is started.

  In FIG. 1, the automotive air conditioner has an air conditioning unit 1. This air conditioning unit 1 is accommodated in an air conditioning case 2 that is a base member and an air conditioning case 2, and the inside air and the outside air are sucked into the air conditioning case 2, and the sucked air is passed through a heat exchanger described below to pass through the vehicle interior. An air blower (not shown) for blowing out air, a heat exchanger (not shown) for changing the air blowing in the air conditioning case 2 to a predetermined temperature, A plurality of doors 3a, 3b, 3c for distributing the conditioned air and a mode switching mechanism 4 for switching the positions of the doors 3a, 3b, 3c according to the air distribution mode are provided.

  The mode switching mechanism 4 includes a plurality of link members 5 (not shown) that are rotated in conjunction with each other by operation of a control cable (not shown), and a plurality of doors 3a, 3b, and 3c respectively supported by the doors 3a, 3b, and 3c. A lever 6 (not shown) is provided, and one of the link members 5 (not shown) and the lever 6 (not shown) is configured in the pin engaging structure shown in FIGS. ing.

  That is, as shown in FIGS. 2 to 4, the link member 5 is rotatably supported by the air conditioning case 2 that is a base member via the support shaft 7. The door 3a is rotatably supported by the air conditioning case 2 with its support shaft 8 between the closed position for closing the air passage 9 in the air conditioning case 2 and the open position for opening the air passage 9. It has been. The lever 6 is fixed to the support shaft 8 of the door 3a, and is supported so that the rotational position of the door 3a can be changed.

  A first pin (one pin) 10 and a second pin (other one pin) 11 project from the link member 5 at positions spaced apart in the circumferential direction and at different radial positions. Has been. The lever 6 has a groove-shaped first pin engaging portion (one pin engaging portion) 12 with which the first pin 10 engages and a groove-shaped second pin engaging portion (others) with which the second pin 11 engages. 1 pin engaging portion) 13 is provided. The first pin engaging portion 12 is in the engaged state of the first pin 10 and is disposed along the same circumferential locus centering on the rotation center of the link member 5. The second pin engaging portion 13 is in an engaged state of the second pin 11 and is disposed on a trajectory that gradually changes outward in the radial direction with respect to the rotation direction of the link member 5.

  Further, at the engagement start end of the second pin engaging portion 13, a bending deformation portion 14 that protrudes and bends when the second pin 11 abuts is provided.

  Next, the operation of the mode switching mechanism 4 will be described. It is assumed that the first pin 10 of the link member 5 is engaged at the innermost position of the first pin engaging portion 12 of the lever 6. In the engaged state of the first pin 10, the door 3a is located at the closed position. When the first pin 10 is engaged and the air distribution mode is switched and the link member 5 rotates in the clockwise direction A, the first pin 10 moves toward the opening end of the first pin engaging portion 12. The second pin 11 moves toward the opening of the second pin engaging portion 13. Then, as shown in FIG. 2, the second pin 11 is located at a position where the second pin 11 interferes with the flexible engagement portion 14 at a position before entering the second engagement portion 13.

  Here, the second pin 11 is moved by the second pin engaging portion 13 due to the variation in the relative position between the first pin 10 and the first pin engaging portion 12 or the repulsive force of the door packing at the moment when the first pin 10 is removed. There is a case where the flexible engaging portion 14 is strongly abutted. When the second pin 11 strongly strikes the deflection engaging portion 14, as shown in FIG. 3, the deflection engaging portion 14 is bent and deformed by the abutting force of the second pin 11, and absorbs the impact force. When the deflection deforming portion 14 returns to the original position by elastic return, the deflection deforming portion 14 guides the second pin 11 to the opening of the second pin engaging portion 13 as shown in FIG. When the link member 5 further rotates from this position, the first pin 10 is disengaged from the first pin engaging portion 12 and the second pin 11 is engaged with the second pin engaging portion 13 as shown in FIG. To start. In the engaged state of the second pin 11, the door 3a is gradually shifted to the open position direction B as the link member 5 rotates, and finally the door 3a is set to the fully open position.

  As described above, in the mode switching mechanism 4, when the engagement state is switched from the first pin 10 to the second pin 11 of the link member 5, the relative position variation between the first pin 10 and the first pin engaging portion 12 is varied. Even if the second pin 11 strongly hits the deflection engaging portion 14 of the second pin engaging portion 13 due to the repulsive force of the door packing at the moment when the first pin 10 is released, the flex engagement is caused by the abutting force of the second pin 11 The portion 14 is bent and deformed to absorb the impact force. Therefore, when the engagement is switched from the first pin 10 to the second pin 11 of the link member 5, no hitting sound is generated.

  In this embodiment, the case where the engagement between the link member 5 and the lever 6 is a combination of the two pins 10 and 11 and the pin engagement portions 12 and 13 has been described. The present invention can be similarly applied to a combination of these.

1 shows an embodiment of the present invention and is a side view of an air conditioning unit of an automotive air conditioner. FIG. FIG. 5 is a partial front view of the mode switching mechanism in a state in which the second pin is in contact with the bending deformation portion according to the embodiment of the present invention. FIG. 5 is a partial front view of the mode switching mechanism in a state where the deflection deformation portion is bent by the contact of the second pin according to the embodiment of the present invention. FIG. 5 is a partial front view of the mode switching mechanism in a state in which the second pin is guided to the opening end of the second pin engaging portion by the bending deformation portion according to the embodiment of the present invention. FIG. 5 is a partial front view of the mode switching mechanism in a state in which the first pin is disengaged from the first pin engaging portion and the second pin is engaged with the second pin engaging portion according to the embodiment of the present invention.

Explanation of symbols

2 Air conditioning case (base member)
3a door 4 mode switching mechanism 5 link member 6 lever 10 first pin (one pin)
11 Second pin (other one pin)
12 1st pin engaging part (one pin engaging part)
13 Second pin engaging portion (another pin engaging portion)

Claims (1)

A link member (5) that is rotatably supported by the base member (2), a lever (6) that is rotatably supported by the rotational position of the door (3a), and a plurality of links provided on the link member (5). The pins (10), (11) and the lever (6) are provided, and a plurality of pins (10), (11) are selectively engaged according to the rotational position of the lever (6). A plurality of pin engaging portions (12), (13) are provided, and the one pin (10) engages with the one pin engaging portion (12) during the rotation of the link member (5). In the mode switching mechanism (4) of the automotive air conditioner that is switched from the engaged state to the engaged state in which the other one pin (11) engages with the other one pin engaging portion (13). There,
An automobile characterized in that a bending engagement portion (14) which is bent and deformed when the other one pin (11) hits is provided at an engagement start end of the other one pin engagement portion (13). Mode switching mechanism (4) of the air conditioner for a vehicle.

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