JP2002219924A - Ventilating passage changeover device of air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a mode door from disengaging at assembling, facilitate a lever assembling work, simplify an assembly tool even when the tool is used, and dispense with further parts for temporary fixing, at assembling the mode door of a ventilating passage changeover device for such as changeover of inside and outside air, controlling of temperature adjusting, and changeover of blow opening, by providing a disengaging prevention part to the mode door. SOLUTION: In this ventilating passage changeover device of an air conditioner for a vehicle, the mode door with the lever for controlling an air flow inside a case is turnably mounted to the case which forms an air passage, the mode door comprising an elastic seal piece projectedly formed from a peripheral edge of a door body. In this ventilating passage changeover device of the air conditioner for the vehicle, a cylindrical part is projectedly formed toward the mode door side from a peripheral edge of a bearing of the case supporting a rotating shaft of the lever by making the shaft pass through the bearing, and an annular projection of an elastic member loosely engaged to an outer peripheral side of the cylindrical part is provided to an outer peripheral part of the rotating shaft at the lever side of the mode door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation path switching device for an air conditioner for a vehicle, in which the flow of gas is controlled by a ventilation path switching mode door for switching between inside and outside air, controlling temperature control, switching an outlet, and the like.

[0002]

2. Description of the Related Art Conventionally, in a ventilation path switching device used for a vehicle air conditioner or the like, a door that switches an air flow, for example, a type using a butterfly door,
A rotation shaft is provided at the center of the side end of the door body, and the door body is rotatably supported by the rotation shaft with respect to a case forming a ventilation path. Such a ventilation path switching device is disclosed in Japanese Unexamined Patent Application Publication No. HEI 11-124, as a sealing means for preventing air leakage around the rotation axis of the butterfly door.
The technology disclosed in Japanese Patent Application Laid-Open No. 1-180129 and Japanese Patent Application Laid-Open No. 2000-46410 is disclosed.

However, in various mode doors including the butterfly door as described above, various assembling operations, repairs,
There is no technology for simplifying the work at the time of component replacement.

[0004]

In a mode door of an air passage switching device such as inside / outside air switching, temperature control control, outlet switching, etc., both ends of a door support shaft do not project a case bearing, or one end of a door support shaft. When assembling the mode door when only the case bearing is projected, (1) the mode door falls off inside the case at the time of assembly, making it difficult to assemble the lever. (2) When using an assembly jig to make difficult work easier, the jig becomes complicated. (3) It is necessary to set a separate part for temporary fixing instead of using a jig. There is.

[0005] Further, when only the lever is replaced in a vehicle-mounted state during the parts replacement service, if the lever is pulled out, the mode door falls into the unit and the work becomes impossible.
There is a problem that the mode door similarly falls into the unit when the lever comes off due to some factor.

An object of the present invention is to solve the above-mentioned problems and problems by providing a mode door with a falling-off preventing portion.
That is, when assembling the mode door of the ventilation path switching device such as inside / outside air switching, temperature control control, outlet switching, etc., prevention of falling off of the mode door at the time of assembly, simplification of lever assembly work,
Even if an assembling jig is used, it is possible to simplify the jig, eliminate the need for a separate temporary fixing part, and the like.
Another object of the present invention is to prevent the mode door from dropping off even when the lever is disengaged during a component replacement service or for some reason, thereby facilitating serviceability.

A second object of the present invention is to provide the mode door with a drop-out preventing portion as an integral structure, so that the sealing member and the drop-out preventing portion are made identical to each other, so that the drop-out preventing function can be performed without adding new cost. Is to be given. In addition, when the fall prevention part is made into an integrated structure, the clearance between the fall prevention part and the case bearing part is adjusted, and by making partial contact with each other, the amount of air leakage around the shaft is reduced and the mode door is suitable. An object of the present invention is to provide sliding resistance and reduce flapping noise when the mode door is operated.

[0008]

According to the present invention, there is provided an air conditioner for a vehicle air conditioner, comprising: a mode door with a lever having an elastic seal piece protruding from a peripheral edge of a door body for controlling an air flow in a case. In a ventilation path switching device for a vehicle air conditioner, which is rotatably attached to the case forming an air passage, wherein the mode door extends from a peripheral edge of a bearing portion of the case that penetrates and supports a rotation shaft portion of the lever. A cylindrical projection is formed to project toward the side, and an annular projection made of an elastic body that is loosely fitted to the outer peripheral side of the cylindrical portion is provided at an outer peripheral portion of the rotation shaft portion on the lever side of the mode door. It is characterized by having been provided.

Further, according to the invention, there is provided a ventilation path switching device for an air conditioner for a vehicle, comprising: a mode door with a lever provided with an elastic seal piece protruding from a peripheral edge of a door body for controlling an air flow in a case; In the ventilation path switching device for a vehicle air conditioner, which is rotatably mounted on the case to be formed, from a peripheral edge of one bearing portion of the case that penetrates and supports a rotation shaft portion of the lever toward the mode door side. When the cylindrical portion is formed so as to protrude, and the annular projection made of an elastic body provided on the outer peripheral portion of the rotation shaft portion on the lever side of the mode door is loosely fitted on the outer peripheral side of the cylindrical portion. When the fitting margin A of the mode door is supported in a fitted state on the other rotating shaft portion on the lever side of the mode door to the other bearing portion of the case, the door body and the other bearing portion of the case Gap
It is characterized by being larger than B.

Further, in the ventilation path switching device for a vehicle air conditioner according to the present invention, it is preferable that the elastic seal piece and the annular projection form an integral structure with the door body.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not construed as being limited to these embodiments.

As shown in FIG. 1, a ventilation path switching device 1 for a vehicle air conditioner according to the present invention controls a case 10 forming an air passage, a mode door 20 for controlling air flow in the case 10, and a mode door 20. A lever 30 is provided for operation. FIG. 2 is an assembly drawing of FIG. 1 when the case 10 is viewed from the side. As shown in FIG. 2, the number of mode doors is not always one per case.

The case 10 has a bearing portion 11 provided for supporting the mode door 20, a cylindrical portion 12 protruding toward the mode door 20, and a bearing for supporting the shaft portion 31 of the lever 30 therethrough. A cylindrical portion 14 protruding toward the mode door 20 is formed.

Although the cylindrical portion 12 is not necessarily provided,
The cylindrical portion 14 is essential in the present invention.

The mode door 20 has a door body 21 for controlling the air flow in the case 10 and rotating shafts 22a and 22 for rotatably supporting the door body 21 having the lever 30 on the case 10.
b, and an elastic seal piece 23 made of an elastic body and formed to protrude from the peripheral edge of the door body 21.

The rotating shaft portions 22a and 22b and the elastic seal pieces 23 are formed of a thermoplastic elastomer material, for example, a rubber elastic body, and have an integral structure with the door body 21 made of, for example, polypropylene. Is molded.

Referring to FIG. 3, the detailed structure of the rotating shaft portions 22a and 22b will be described. The rotation shaft portion 22a has a shaft shape, and is rotatably fitted to the bearing portion 11 provided on the case 10.
The height of the cylindrical portion 12 is determined by the degree of protrusion of the elastic seal piece 23a adjacent to the case 10, that is, the length 23b of the elastic seal piece.
Determined by The length 23b of the elastic seal piece is adjusted so that there is no air leakage and no extra force is required for the rotation of the mode door 20.

Here, the gap between the door body 21 and the cylindrical portion 12 is denoted by B. In the present invention, since the cylindrical portion 12 is not necessarily provided, when the cylindrical portion 12 is not provided,
The gap between the door body 21 and the bearing 11 is denoted by B.

The rotating shaft 22b has a cylindrical hole 32 into which the shaft 31 of the lever 30 is fitted. Further, an annular protrusion 24 integrally formed with the elastic seal piece 23 is formed on the outer peripheral side portion of the rotating shaft portion 22b. The inner diameter of the annular projection 24 is formed slightly larger than the outer diameter of the cylindrical portion 14 provided on the case 10. Then, the annular projection 24 of the rotating shaft portion 22b is loosely fitted on the outer peripheral side of the cylindrical portion. The fitting margin at this time is A. Thus, as shown in FIG. 3, the mode door 20 to which the lever 10 is connected is
Is rotatably supported.

In the present invention, the fitting margin A and the clearance B
Is adjusted so that the relation with

[0021]

[Formula 1] Fitting allowance A> Gap B

Next, referring to FIG. 3 and FIG.
The operation of attaching and detaching the mode door 20 from 10 and the assembling operation will be described.

First, the lever 30 is removed from the mode door 20. Conventionally, the mode door is removed by removing the lever 30
The mode door 20 is
In the present invention, since the annular projection 24 was loosely fitted on the outer peripheral side of the cylindrical portion 14 when the lever 30 was removed, the mode door 20 was supported even if the lever 30 was removed. And the mode door 20 does not fall off due to its own weight. At this time, since the fitting margin A and the gap B are adjusted so as to satisfy the relationship of the formula 1, the annular projection 24 functions as a falling-off preventing portion. Therefore, no special jig is required, and it is not necessary to provide the mode door with a special shape for preventing falling off. Further, even if the lever 30 comes off due to some trouble, the mode door 20 does not fall off.

Next, the mode door 20 is removed as shown in FIG. At this time, since the annular projection 24 formed of an elastic body is deformed flexibly while being in contact with the cylindrical portion 14 which is a rigid body, the mode door 20 can be easily removed. Therefore,
It is important that the annular projection 24 is an elastic body, and if it is a rigid body, the function of the present invention is not achieved.

On the other hand, when assembling the mode door 20 to the case 10, first, the rotating shaft 22 a of the mode door 20 is attached to the case 10.
Then, the annular projection 24 of the rotating shaft portion 22b is loosely fitted to the outer peripheral side of the cylindrical portion. At this time, since the annular projection 24 formed of an elastic body is deformed flexibly while being in contact with the cylindrical portion 14 which is a rigid body, the mode door 20 can be easily assembled. As described above, it is important that the annular projection 24 be an elastic body. Conventionally, if the mode door 20 is not supported by a special jig or the like, the mode door 20 will fall out. Functions as a unit. Even if a special jig or the like is not used, the mode door 20 does not fall off. The assembler can release the hand from the mode door 20 and easily connect the lever 30 to the mode door 20.

In the present invention, the pivot shaft provided on the door main body of the mode door may be provided at one end of the door main body in addition to being provided at the center of the door main body. For example, when the pivot shaft is provided at the center of the door body, the mode door has a butterfly door function, and when the pivot shaft is provided at one end of the door body, the cantilever door is provided. It will have a function.

In the present invention, the shape of the annular projection made of an elastic body is desirably a perfect cylinder, but a part of the cylinder is missing. Shape, a shape approximating a cylindrical shape, a polygonal shape, and the like. The point is that even if the lever is removed from the mode door, it is sufficient that the annular projection is hooked on the cylindrical portion provided on the case so that the mode door is supported by the case and does not fall off by its own weight.

The elastic body in the present invention means rubber elasticity, and examples thereof include synthetic rubbers such as natural rubber, butadiene rubber, isoprene rubber, and styrene-butadiene rubber, and thermoplastic elastomers. In the present invention,
It is preferable to use a thermoplastic elastomer as the elastic body. The case and the door main body are selected from relatively rigid resins, and examples thereof include polypropylene.

The rotating shaft 22a provided on the door body and the case 1
As shown in FIG. 3, the fitting state with the bearing portion 11 is a structure in which the rotating shaft portion 22a is fitted to the bearing portion 11 opened in the case, or a hole provided inside the rotating shaft portion. In addition to a structure (not shown) in which the support shaft provided in the case fits, a similar structure is also included.

In this embodiment, when the annular projection 24, which is a drop-preventing portion, is formed integrally with the door body 21 together with the elastic sealing piece 23, the clearance between the annular projection 24 and the cylindrical portion 14 is adjusted, The contact may be made temporarily. As a result, it is possible to reduce the amount of air leakage around the shaft, provide an appropriate sliding resistance to the mode door, and reduce flapping noise when the mode door is operated. Further, by using an elastic body such as a thermoplastic elastomer as the annular projection 24 and the elastic seal piece 23, the friction of the sliding portion is small and the durability is excellent.

[0031]

According to the ventilation path switching device for a vehicle air conditioner of the present invention, an annular projection made of an elastic body is provided, and a mode door is provided with a fall-prevention function. When assembling the mode door of the ventilation path switching device such as switching, prevention of falling off of the mode door at the time of assembly and simplification of lever assembling work, simplification of the jig even if an assembling jig is used, It is possible to eliminate the necessity of a separate component for temporary fixing. In addition, even when the lever is disengaged during a component replacement service or for some reason, the mode door is prevented from falling off, and serviceability can be facilitated.

In the ventilation path switching device for a vehicle air conditioner according to the second aspect, the relationship between the fitting allowance A and the gap B is adjusted so as to satisfy Equation 1 after providing the annular projection made of an elastic body. Even if the mode door is slightly shifted back and forth in the direction of the rotation axis, it does not fall off.

According to the third aspect of the present invention, the drop-off preventing portion is provided as an integral structure, so that the sealing member and the drop-out preventing portion are made identical to each other without adding new costs. A fall prevention function and the like can be provided. In addition, when the fall prevention part is made into an integrated structure, the clearance between the fall prevention part and the case bearing part is adjusted,
By partially contacting each other, it was possible to reduce the amount of air leakage around the axis and to provide an appropriate sliding resistance to the mode door, thereby reducing the fluttering noise when operating the mode door. Further, since the seal member and the member of the falling-off preventing portion are made of an elastic body, the friction of the sliding portion is small and the durability is excellent.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of one embodiment of a ventilation path switching device of a vehicle air conditioner of the present invention.

FIG. 2 is an assembly view of one embodiment of a ventilation path switching device for a vehicle air conditioner according to the present invention.

FIG. 3 is an embodiment of a ventilation path switching device for a vehicle air conditioner according to the present invention, and is a view showing a detailed structure of a rotating shaft portion of an assembled mode door.

FIG. 4 is an embodiment of a ventilation path switching device for a vehicle air conditioner according to the present invention, and is a view showing a detailed structure of a mode door rotating shaft portion when the mode door is attached / detached.

[Explanation of symbols]

 1, Ventilation path switching device for vehicle air conditioner 10, Case 11, 13, Bearing part 12, 14, Cylindrical part 20, Mode door 21, Door body part 22a, 22b, Rotating shaft part 23, Elastic seal piece 24, Annular projection 30, Lever 31, Shaft part 32, Cylindrical hole

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[Procedure amendment]

[Submission date] January 26, 2001 (2001.1.2)
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Title: Ventilation path switching device for vehicle air conditioner

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Nakajima 39, Higashihara, Chiyo-ji, Konan-cho, Osato-gun, Saitama Prefecture Inside of Xexel Valeo Climate Control Co., Ltd. Higashihara 39 Co., Ltd. Zexel Valeo Climate Control F-term (reference) 3L011 BJ02

Claims (3)

[Claims] 1. A vehicle having a lever-equipped mode door provided with an elastic seal piece protruding from a peripheral edge of a door body for controlling airflow in a case, rotatably mounted on the case forming an air passage. In the ventilation path switching device for an air conditioner for use, a cylindrical portion is formed to protrude from a peripheral edge of a bearing portion of the case that penetrates and supports a rotating shaft portion of the lever toward the mode door, and a lever side of the mode door. On the outer peripheral side of the rotating shaft portion of
A ventilation path switching device for a vehicle air conditioner, wherein an annular projection made of an elastic body is loosely fitted on the outer peripheral side of the cylindrical portion. 2. A vehicle having a lever-equipped mode door provided with an elastic seal piece protruding from a peripheral edge of a door body for controlling air flow in a case, rotatably mounted on the case forming an air passage. In the ventilation path switching device for an air conditioner, a cylindrical portion is formed so as to protrude from a peripheral edge of one bearing portion of the case that penetrates and supports the rotating shaft portion of the lever toward the mode door, An annular protrusion made of an elastic body provided on an outer peripheral portion of the rotating shaft portion on the lever side is fitted to the outer peripheral side of the cylindrical portion in a loose fit, and a fitting allowance A is provided on the lever side of the mode door. When the other rotating shaft portion is supported by the other bearing portion of the case in a fitted state, the gap is larger than a gap B between the door body and the other bearing portion of the case. Ventilation path switching device for air conditioner. 3. The ventilation path switching device for a vehicle air conditioner according to claim 1, wherein the elastic seal piece and the annular projection form an integral structure with the door body.