JPH09104217A - Duct structure of air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce backlash of a shaft in the thrust direction and facilitate the mounting work by installing a door in such a way that it is engaged with the shaft, and furnishing a part to hinder the door from slipping off from the shaft. SOLUTION: A door lever 103 and a shaft 104 are previously consolidated, and there is no more need to make the overall length of the shaft 104 excuding the part of shaft 104m smaller than the distance between two confronting plates 101a and 101b, and further it is possible to maintain the installation on a casing 101 by pinching the plate 101a by a pawl 103d of a detent piece 103b on the door lever 103. Thereby rattles of the shaft 104 in the thrust direction can be reduced. Eventual rattling can be suppressed within the tolerance between the pawl 103d and the plate 101a, remaining minimally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-conditioning duct structure capable of switching air distribution by rotating a shaft that transmits power of a door lever in a duct to rotate a door integrated with the shaft. In particular, the present invention relates to an air conditioning duct structure that facilitates assembly of a door lever, a shaft, and a door in a duct.

[0002]

2. Description of the Related Art As an example of an air conditioning duct, the structure of an intake duct having an inside / outside air switching door of the duct constituting a vehicle air conditioner is shown in FIGS. This example is disclosed in Japanese Utility Model Publication No. 3-50351, and in the figure,
Reference numeral 13 denotes an intake duct, which has a fan-shaped box shape when viewed from the side, in which the inside air introduction port 9 is formed on one side (the side on the right side in the drawing) and a cylindrical shape on the other side (the side on the left side in the drawing). The outside air introduction port 11 is formed, and the other side surface (side surface on the bottom surface side in the drawing)
An air outlet (not shown) is formed on the side. Also, a pair of opposed plates 13a, 1 forming a fan-shaped intake duct 13
A hole 13c for inserting a rotating shaft 7a of a door lever 7 described later and a hole 13d for inserting a shaft of a shaft 32 described later are formed on a side of the fan 3b which is a fulcrum of the fan. Reference numeral 14 is a blower duct, one of which is connected to the downstream side of the air circulation of the intake duct 13, that is, the air outlet side, and the other is connected to the head of a duct that houses an evaporator, a heater core, etc., although not shown.

Reference numeral 1 denotes a drive lever, which is attached to an output shaft in an actuator 30 installed in the blower duct 14, and is driven by the actuator 30 to move halfway in a direction approaching a relay lever 3 described later and a direction separating from the relay lever 3. Move.
A hole 1a is formed on the tip 2 side of the drive lever 1,
One bent portion of the rod 20 is inserted. A relay lever 3 is formed in an L shape, the other bent portion of the rod 20 is inserted into the hole 3b formed on the one end 3a side, and the door lever 7 to be described later is inserted on the other end side. Is provided with a pin 4 which is slidably contacted with the cam groove 5, and a central shaft 3c which is the center of rotation is rotatably fixed to the intake duct 13. Further, the rod 2 is provided on the tip 3a side of the relay lever 3.
A holding portion 3d is provided to prevent 0 from falling off.

As shown in FIG. 8, the door lever 7 has a shaft 32 positioned inside the intake duct 13 after the rotary shaft 7a, which is the center of rotation, is inserted into the hole 13c.
The intake door 8 is attached to the shaft 32 so that the intake door 8 can be rotated along with the rotating shaft 7a, and the above-described cam groove 5 is formed. The cam groove 5 has a substantially heart shape, and has first and second concentric lock groove portions 5a and 5c having a curve concentric with the central axis 3c of the relay lever 3, and a neutral groove 5b.

When the intake door 8 is rotated in one direction, one side of the lining 8a is stably pressed against the stopper 10 to close the inside air introduction port 9 side of the intake duct 13, and when rotated in the other direction. The other lining 8b side is stably pressed against the stopper 12 to close the outside air introduction port 11 side of the intake duct 13.

The operation of the inside / outside air switching duct will be described. When the tip 2 of the drive lever 1 is rotated from the position separated from the relay lever 3 to the position approaching the relay lever 3 in the direction of arrow a, the pin 4 at the tip of the relay lever 3 is provided on the door lever 7. First concentric lock groove portion 5 of the cam groove 5
From the side a, it slides through the neutral groove 5b and reaches the second concentric lock groove portion 5c. In this process, the pin 4 rotates the door lever 7 in the clockwise direction, and
Of the intake door 8 integrated with the shaft 32 is introduced into the outside air by rotating the rotary shaft 7a of the same in the clockwise direction, thereby rotating the shaft 32 integrally connected to the rotary shaft 7a in the clockwise direction. The stopper 12 on the mouth 11 side is pressed stably. In this case, the wind pressure can be suppressed in opposition to the wind pressure to be flown into the outside air introduction port 11 side with a relatively large force, and only the inside air is introduced into the intake duct 13 through the inside air introduction port 9 and the blower duct 1
It will be guided to the evaporator side (not shown) via the downstream side.

On the contrary, when the drive lever 1 is rotated in the opposite direction to the above case, the pin 4 slides on the second concentric lock groove portion 5c-the neutral groove 5b-the first concentric lock groove portion 5a. To reach the first concentric lock groove portion 5a. In this process, the pin 4 rotates the door lever 7 in the counterclockwise direction and also rotates the rotating shaft 7a of the door lever 7 in the counterclockwise direction, thereby rotating the shaft 32 integrally connected to the rotating shaft 7a. By rotating clockwise, the lining 8a side of the intake door 8 integrated with the shaft 32 is pressed stably against the stopper 10 on the inside air introduction port 9 side. In this case, the wind pressure can be blocked against the wind pressure that should be introduced with a relatively large force to the inside air introduction port 9 side, and only the outside air is introduced into the intake duct 13 via the outside air introduction port 11, and the blower duct It is led to the downstream evaporator side (not shown) via 14.

Next, the assembling relationship of the door lever 7, the shaft 32, and the intake door 8 will be described in detail. Door lever 7
The rotary shaft 7a protruding outward from the inner surface side is formed in a U-shape having a flexible tip, and a protrusion 7c is formed on the outer surface of the folding side 7b. The intake door 8 is attached to the shaft 32 in advance. A hole 32a for inserting the rotary shaft 7a of the door lever 7 is formed at one tip end side of the shaft 32.
A hole 32b for inserting the projection 7c of the rotary shaft 7a is formed at a predetermined position on the inner wall of the. A shaft 32c to be inserted into the shaft insertion hole 13d of the counter plate 13b is formed on the other end side of the shaft 32.

When assembling the door lever 7 and the shaft 32 in the intake duct 13, first, the shaft 32 for integrating the intake door 8 is housed in the intake duct 13, and at that time, the shaft 32c of the shaft 32 is accommodated.
After inserting into the shaft insertion hole 13d of the facing plate 13b,
A hole 32 for inserting the rotary shaft 7a at one end of the shaft 32
a is aligned with the hole 13c for inserting the rotary shaft 7a of the door lever 7 of the one opposing plate 13a. After this state, the rotary shaft 7a of the door lever 7 is inserted into the hole 13c for inserting the rotary shaft 7a of the door lever 7 of one of the counter plates 13a, and further, the rotary shaft 7a at the one end of the shaft 32 has a hole 32a for insertion.
Insert into

At the time of this insertion, the projection 7c on the tip side 7b of the rotary shaft 7a of the door lever 7 is inserted into the hole 1 for inserting the rotary shaft 7a.
The rotary shaft 7a is caused to enter the hole 13c for inserting the rotary shaft 7a, while the distal end side 7b is deflected inwardly by being in contact with the inner wall of 3c and being relatively pressed by the inner wall. Then, the rotation shaft 7a is inserted into the hole 32 for inserting the rotation shaft 7a of the shaft 32.
When it reaches a predetermined position in a, the protrusion 7c on the tip side 7b enters and engages with the hole 32b in the inner wall of the hole 32a by the restoring force of the tip side 7b, and the insertion of the rotary shaft 7a is locked.

On the other hand, the assembly structure of the door lever and the shaft having the door has been variously developed in addition to the structure described above, for example, the one disclosed in Japanese Utility Model Publication No. 62-2442. In this case, as shown in FIG. 9, the rotary shaft 42 of the door lever 41 is composed of two projecting portions 42a and 42b projecting through the groove 43, and a projection 44 is provided on the outer surface of one projecting portion 42a. Has been. Corresponding to this, the shaft 45 integrated with a door (not shown)
A shaft that is inserted into a shaft insertion hole of an opposite plate (not shown) of the duct 47 on the opposite side is provided at one end of the rotary shaft 4 and the other end of the rotary shaft 4 that matches the shape of the rotary shaft 42 of the door lever 41.
A hole 46 for inserting the rotary shaft 42 capable of accommodating 2 is formed, and the projection 4 of the rotary shaft 42 is formed on a part of the inner wall of the hole 46.
A hole 47 for inserting 4 is formed.

The assembling method is basically the same as that of the above-mentioned conventional example, and first, the shaft 4 for integrating the door in the duct 47 is formed.
5, the shaft (not shown) at one end of the shaft 45 is inserted into the shaft insertion hole of the opposite plate (not shown) on the opposite side of the duct 47, and the rotary shaft 4 at one end of the shaft 45 is inserted.
2 The hole 46 for insertion is aligned with the hole 48 for insertion of the rotary shaft 42 of the opposing plate of the duct 47. After this state, the rotary shaft 42 of the door lever 41 is inserted into the hole 48 of the duct 47 for inserting the rotary shaft 42, and further inserted into the hole 46 of the shaft 45 for inserting the rotary shaft 42.

At the time of this insertion, the projection 44 of the one projection 42a of the door lever 41 is relatively pressed against the inner wall of the hole 46 for inserting the rotation shaft 42 of the shaft 45, so that the projection 42 is in a relative position.
While a is bent inward, it enters into the hole 46 for inserting the rotary shaft 42, and the rotary shaft 42 is inserted into the rotary shaft 42 of the shaft 45.
When reaching a predetermined position within the insertion hole 46, the protrusion 42
The protrusion 44a of the protrusion 42a enters and engages with the hole 47 in the inner wall of the hole 46 by the restoring force of a, and locks the insertion of the rotary shaft 42.

Further, as one disclosed in Japanese Utility Model Publication No. 63-39128, there is one shown in FIG. In this case, the rotary shaft 52 of the door lever 51 is provided with a plurality of claw portions 56, which are locked to the inner wall of the hole 55 of the facing plate 54 of the duct 53, arranged in a ring-shaped position, and the positions inside the plurality of claw portions 56 are provided. In the above, one projecting portion 58 which projects outward and has a hole 57 for inserting the shaft is provided at the center position passing through the center shaft from the tip. Shaft 5 that integrally has a door (not shown)
9 has a shaft which is inserted into a hole of an opposite plate (not shown) of the duct 53 at one end, and a shaft 60 which is inserted into a hole 57 for shaft insertion of the protrusion 58 of the door lever 51 at the other end. Is configured.

The assembling method is almost the same as that of the above-mentioned conventional example. First, the shaft 59 which integrates the door in the duct 53 is formed.
The shaft (not shown) at one end of the shaft 59 is inserted into the hole of the opposite plate (not shown) on the opposite side of the duct 53, and the shaft 60 at one end of the shaft 59 is inserted into the opposite plate 54 of the duct 53. Match the holes 55. After this state, the rotary shaft 52 of the door lever 51 is inserted into the hole 55 of the counter plate 54 of the duct 53, and the shaft 59 is inserted into the hole 57 for inserting the shaft of the protrusion 58 of the rotary shaft 52 of the lever 51.
The shaft 60 of is inserted.

At the time of this insertion, the plurality of claw portions 56 are relatively pushed by the inner wall of the hole 55 of the facing plate 54 of the duct 53 and bent inward, and when the insertion of the rotary shaft 52 reaches a predetermined position,
The plurality of claw portions 56 engage with the inner wall of the counter plate 54 of the duct 53 by their own restoring force to lock the insertion of the rotary shaft 52 and lock the assembly of the rotary shaft 52 and the shaft 59.

Further, there is one shown in FIG. 11 as disclosed in Japanese Utility Model Publication No. 63-39128. In this case, the rotary shaft 62 of the door lever 61 is provided with a plurality of claw portions 66 that engage with the inner wall of the hole 65 of the facing plate 64 of the duct 63 arranged in a ring-shaped position, and the positions inside the plurality of claw portions 66 are provided. In the configuration, one projecting portion 68 that projects outwardly and has a key portion 67 that has a convex shape in a front view is provided from the tip to a predetermined position. The shaft 69 integrally having a door (not shown) is provided with a shaft which is inserted into a hole of the opposite plate (not shown) of the duct 63 on the opposite side, and has the other end which conforms to the shape of the protruding portion 68 of the door lever 61. It is configured by forming a hole 70 for inserting the protrusion 68 through which the protrusion 68 can be inserted.

The assembling method is almost the same as that of the above-mentioned conventional example. First, the shaft 69 for integrating the door in the duct 63 is formed.
The shaft 69 at one end of the shaft 69 is inserted into the hole of the counter plate on the opposite side (not shown) of the duct 63, and then the hole 70 for inserting the protrusion 68 at one end of the shaft 69 is inserted into the duct. The holes 63 of the counter plate 64 of 63 are aligned.
After this state, the rotary shaft 62 of the door lever 61 is inserted into the hole 65 of the counter plate 64 of the duct 63, and the protruding portion 68 of the door lever 61 is connected to the protruding portion 68 at one end of the shaft 69.
It is inserted into the insertion hole 70.

At the time of this insertion, the plurality of claw portions 66 are relatively pushed by the inner wall of the hole 65 of the opposing plate 64 of the duct 63 and bent inward, and when the insertion of the rotary shaft 62 reaches a predetermined position,
The plurality of claw portions 66 engage with the inner wall of the opposing plate 64 of the duct 63 by their own restoring force to lock the insertion of the rotary shaft 62 and lock the assembly of the rotary shaft 62 and the shaft 69.

As yet another example, as shown in FIG. 12, the shaft 71 and the door 72 are separately configured, and the shaft 71 inserted into the duct 73 through the holes 74 and 75 of the duct 73 is It has also been developed that the door 72 is integrated with a screw 76.

[0021]

In the conventional examples shown in FIGS. 8 to 11, the shafts 32, 45, 59, 6 are all used.
In order to improve the turning property and the assembling property of the door 9, the door levers 7, 41, 41 on the shafts 32, 45, 59, 69,
One end of 51, 61 on the side of engagement with the rotating shafts 7a, 42, 52, 62, and the facing plates 13a, 47, 5 on the side facing this.
It is necessary to leave a slight gap between 4, 64,
For this reason, except for the portions of the shafts 32c, which are inserted into the holes 13d, of one of the facing plates 13b, the shafts 32, 4 are excluded.
5,59,69, the total length of the opposing plates 13a, 47,
It is unavoidable to set the distance smaller than the distance between 54, 64-13b ..., and there is a drawback in that the shafts 32, 45, 59, 69 are loosened in the thrust direction.

In the conventional examples shown in FIGS. 8 to 11, the doors 8 and the like are previously integrated with the shafts 32, 45, 59 and 69, and the shafts 32 and 4 are integrated.
5, 59, 69 are housed in the ducts 13, 47, 53, 63, and the positions of the one ends 32a, 46, 60, 70 of the shafts 32, 45, 59, 69 are set to the ducts 13, 4 respectively.
7, 53, 63 of the facing plates 13a, 47, 54, 64 of the corresponding holes 13c, 48, 55, 65 of the duct 13, 13, 47, 53, 63 of the facing plate 13 of the duct.
a, 54, 64 predetermined holes 13c, 48, 55, 65
, The rotary shafts 7a, 42, 52, 62 of the door levers 7, 41, 51, 61 are inserted from the outside, and one end sides 32a, 46, 60 of the shafts 32, 45, 59, 69,
Assembly is performed by properly engaging the rotary shafts 7a, 42, 52, 62 of the door levers 7, 41, 51, 61 with respect to 70. This assembly work is performed by the duct 1
Since it is performed manually in 3, 47, 53, 63, it is very difficult to visually judge the correct engagement, which is so-called blind work, which is very inefficient. It was annoying.

Further, in the conventional example shown in FIG. 12, the duct 7
The shaft 71 and the door 72 using the screw 76 in
Needless to say, the work is more inefficient and more troublesome in this case.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an air-conditioning duct structure that reduces the play in the thrust direction of the shaft and facilitates the assembly work.

[0025]

According to the first aspect of the present invention,
A shaft having both ends inserted in both holes, which are inserted from one hole provided in the facing plate of the casing to the other hole,
In an air-conditioning duct structure including a door whose root side is supported by the shaft and a door lever for transmitting rotational power provided on one end of the shaft outside the casing, the door is engaged with the shaft. Thus, the door is attached, a blocking portion is provided to prevent the door from coming off the shaft, and the door is fixed to the shaft in an engagement relationship by the blocking portion. According to a second aspect of the present invention, the door lever is integrated with the shaft, and the door lever side has a claw portion which penetrates a hole of the facing plate on the door lever side and abuts on an inner surface side of the facing plate at a tip side. Is provided to prevent the shaft from coming off.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment of the Invention 1 to 3 are explanatory views for explaining a first embodiment of the present invention, and the first embodiment is also applied to the inside / outside air switching duct shown in FIG. 7. In FIG. 1, reference numeral 100 schematically represents an intake duct, and holes 102a, 1 facing each other to facing plates 101a, 101b facing each other of a casing 101.
02b is provided. One hole 102a is the hole 102
The diameter is larger than b, and from this hole 102b,
Shaft 10 with door lever 103 integrated at the root side
4 is inserted, and the shaft 104m at the tip of the shaft 104 is inserted into the hole 102b.

As shown in FIGS. 2A and 2B, the shaft 104 has a C-shaped roundness f on the rear surface (upper surface) 104a side.
Is composed of a substantially rectangular prism, and the rear surface 104
A key portion 104b made of a projecting body is provided at the center, left, and right of a, and both side surfaces 104c and 104c of the shaft 104 corresponding to the key portion 104b are inclined surfaces 104h in the back direction of the shaft 104. Claw portion 104 as a blocking portion
d is projected, and the solid portion of the shaft 104 corresponding to the claw portion 104d is hollowed out in an arch shape, so that the cross-sectional shape of the shaft 104 at this portion is as shown in FIG. 2 (b). It is U-shaped.

The shaft 104, which is inserted into the hole 102b, has a cylindrical shaft 104m at the tip thereof.
The structure is such that it can freely rotate within 02b. Also,
The seat portion 10 of the door lever 103 on the base side of the shaft 104
3a abuts on the outer surface of the hole 102a, and
From a, a plurality of locking pieces 103b are inserted through the holes 102a and penetrate therethrough.
A claw portion 103d that prevents the locking piece 103b from coming off by being brought into contact with the inner surface of a is provided. This claw part 1
03d has a tip inclined so that the locking piece 103b can be easily inserted into the hole 102a.

Reference numeral 105 denotes the casing 1 from the root 105j side.
3 is an air control door (intake door) which is stored through the opening 101x of No. 01 and controls air.
As shown in (a) and (b), a lining 1 is provided on both sides thereof.
05a and 105b are lined, and a U-shaped cross-section engaging portion 106 having a U-shaped cross-section is formed integrally with the outer surface of the shaft 104 on the root 105j side.

Opposing plates 106a, 10 of the engaging portion 106
6a are parallel to each other and are flat so as to contact both side surfaces 104c, 104c of the shaft 104 shown in FIGS. 2 (a) and 2 (b).
The claw portion 10 for fitting the claw portion 104d to the 6a
Hole 106b serving as a blocking portion having the same rectangular shape as 4d.
And a recess 106 for preventing the displacement in the rotation direction of the back surface 104a by fitting the key portion 104b on the bottom surface side of the U-shaped groove 106c inside thereof.
d is formed. A cutout portion 105g for preventing the claw portion 103d from contacting the side portion of the air control door 105 on the base 105j side is formed.

According to the above configuration, as shown in FIG.
First, the shaft 104 is inserted into the hole 102b through the hole 102a of the casing 101 from the side of the shaft 104m at the tip end thereof, and the locking piece 103b is pushed into the hole 102a.
The claw portion 103d of the locking piece 103b is locked to the inner surface side of 02a to set the shaft 104 so that it cannot be pulled out.

Next, the door lever 103 is held so as not to move by any jig or hand, and the shaft 104 is held.
The air control door 105 is housed in the casing 101 from the side of the engaging portion 106 while the rotation of the shaft 10 is prevented.
The air control door 105 is pushed in so that 4 fits into the U-shaped groove 106c of the engaging portion 106. Thereby, the engaging portion 1
The inner surfaces of the facing plates 106a, 106a of No. 06 are in contact with both side surfaces 104c, 104c of the shaft 104 which are parallel to this.
The engaging portion 106 is slid toward the shaft 104 while guiding both side surfaces 104c and 104c.

Next, since the key portion 104b is fitted in the recess 106d and the claw portion 104d is fitted in the hole 106b, the engaging portion 106 is securely fixed, and the engaging portion 106 comes out of the shaft 104 or rotates. There is no fear of moving.

According to the first embodiment of the present invention, by adopting the structure in which the door lever 103 and the shaft 104 are previously integrated with each other, the entire length of the shaft 104 except for the shaft 104m is reduced to the opposite plate 101a. , 101b does not need to be set smaller than the distance between them, and since the facing plate 101a is sandwiched by the claw portions 103d of the locking pieces 103b of the door lever 103, the assembly to the casing 101 can be maintained. The play in the thrust direction can be reduced. That is, even if there is play in the thrust direction of the shaft 104, it can be reduced to an extremely small amount because it can be suppressed only to the tolerance between the claw portion 103d of the locking piece 103b and the facing plate 101a.

Further, according to the first embodiment of the present invention,
The shaft 104 is connected to the holes 102a, 10 of the casing 101.
The insertion between the holes 2b is very simple because it is easy to visually check the holes 102a and 102b from the opening 101x of the casing 101, and further, the shaft 104 inserted between the holes 102a and 102b. It is also possible to engage the air control door 105 with respect to the shaft 10 from the opening 101x of the casing 101, for example.
4 is very easy because it is easy to see.
Moreover, by holding the door lever 103, the shaft 10
4, the air control door 105 is accommodated in the casing 101 from the side of the engaging portion 106, and the shaft 104 is fitted in the U-shaped groove 106c of the engaging portion 106. When is pushed in, the inner surfaces of the facing plates 106a, 106a of the engaging portion 106 guide the side surfaces 104c, 104c of the shaft 104 parallel to this, and the engaging portion 106 is slid in the direction of the shaft 104. This assembling work is very simple, and even if it becomes a blind work, the work is very efficient and is not bothersome. Also, the casing 10
When the air control door 105 is pushed in so that the shaft 104 fits into the U-shaped groove 106c of the engaging portion 106, the claw portion 1047 as a blocking portion of the shaft 104 is formed.
d is fitted in the hole 106b of the engaging portion 106, and the shaft 1
04, the air control door 105 cannot be pulled out, so that the assembly can be firmly fixed, and the key portion 104b of the shaft 104 has the concave portion 10 of the engaging portion 106.
6d can be reliably prevented from rotating the air control door 105 with respect to the shaft 104, and it is sufficient to endure and maintain the stop of the air control door 105 at a predetermined position against a strong wind pressure. It will be possible.

Second Embodiment of the Invention 2. 4 to 6 are explanatory views for explaining the second embodiment of the present invention. The same parts as those shown in FIGS. 2 and 3 are designated by the same reference numerals and the description thereof will be omitted. As shown in FIGS. 4 (a) and 4 (b), the shaft 204 is formed of a substantially cylindrical body having a back surface (top surface) 204a and an abdominal surface (bottom surface) 204b as flat surfaces. On the back 204a
An engagement hole 204c is formed as a blocking portion that passes through the center shaft and reaches the abdominal surface 204b.

As shown in FIGS. 5 (a) and 5 (b), the root 205j of the air control door 205 is provided with locking pieces 205b projecting downward at approximately the center, left and right. The locking piece 205b is inserted into the engagement hole 204c of the shaft 204, and is composed of two projecting portions 205d and 205d that project in parallel with each other via the groove 205c. A claw portion 205e is provided on the outer surface of the tip to prevent the locking piece 205b from coming off by coming into contact with the belly surface 204b of the shaft 204. The claw portion 205e has an inclined tip so that the locking piece 205b can be easily inserted into the engagement hole 204c. The body pressure of the body portion 205f of the air control door 205 is larger than the body pressure of the locking piece 205b.
Bottom part 2 located outside the locking piece 205b at 5f
05g serves as an engagement surface with the back surface 204a of the shaft 204.

According to the above construction, first the shaft 204
From the shaft 104m at its tip to the hole 10 of the casing 101.
The locking piece 103b while being inserted into the hole 102b through the 2a.
Is pushed into the hole 102a, the claw portion 103d of the locking piece 103b is locked to the inner surface side of the hole 102a, and the shaft 204
Is set so that it cannot be pulled out.

Next, while holding the door lever 103 to prevent the shaft 204 from rotating, the casing 101
The air control door 205 is housed from the side of the engaging piece 205b, and as shown in FIGS. 6 (a) and 6 (b), the engaging piece 205b is
Pushes in the air control door 205 so that is inserted into the engagement hole 204c of the shaft 204. At this time, the engaging piece 205
The claw portions 205e of the protrusions 205d and 205d of b are pressed relative to the inner surface of the engagement hole 204c, and thus the protrusions 205d.
Therefore, the d and 205d are bent inward with respect to each other, whereby the protrusions 205d and 205d of the engagement piece 205b are formed.
Can be inserted through the engagement hole 204c.

Thereafter, when the bottom surface portion (engagement surface) 205g of the main body portion 205f of the air control door 205 comes into contact with the back surface 204a of the shaft 204, each protruding portion 205
The insertion of d and 205d into the engagement hole 204c becomes the deepest, and the claw portions 205e of the protrusions 205d and 205d are exposed to the outside from the abdominal surface 204b of the shaft 204 and engage with the abdominal surface 204b of the shaft 204. As a result, the engaging piece 2
05b is securely fixed, and there is no fear that the air control door 205 will come off the shaft 204 or rotate.

According to the second embodiment of the present invention, it is possible to obtain the same effect as that of the first embodiment with a simpler structure.

Although the present invention has been described in the case of being applied to the door of the inside / outside air switching duct, the gist of the present invention is not limited to this, and an air mix door or a mode door (defrost mode door, Of course, it can be applied to other doors such as heater mode doors and face mode doors.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a configuration of a shaft used in the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a configuration of an air control door used in the first embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating a configuration of a shaft used in the second embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating a configuration of an air control door used in the second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an enlarged part of the operation of the second embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating an example of a background of a conventional technique.

FIG. 8 is an explanatory diagram illustrating a conventional technique.

FIG. 9 is an explanatory diagram illustrating another conventional technique.

FIG. 10 is an explanatory diagram illustrating still another conventional technique.

FIG. 11 is an explanatory diagram illustrating still another conventional technique.

FIG. 12 is an explanatory diagram illustrating still another conventional technique.

[Explanation of symbols]

 100 Intake Ducts 101a, 101b Opposing Plates 102a, 102b Holes 103 Door Lever 103b Locking Pieces 103d Claws 104 Shafts 104b Keys 104d Claws (Blocks) 105 Air Control Door 106 Engagements 106b Holes (Blocks) 106d Recesses

Claims (2)

[Claims] 1. A shaft which is inserted from one hole provided in an opposing plate of a casing into the other hole so that both ends are inserted into both holes, a door whose root side is supported by this shaft, and the above casing. An air-conditioning duct structure provided with a door lever for transmitting rotational power provided at one end of the shaft on the outside of the shaft, the door being attached to the shaft so as to engage the door, and the door from the shaft An air-conditioning duct structure, characterized in that a blocking portion is provided for blocking the slip-off, and the door is fixed to the shaft in an engagement relationship by the blocking portion. 2. The door lever is integrated with the shaft, and the door lever side is provided with a claw portion which penetrates a hole of the facing plate on the door lever side and abuts on the inner surface side of the facing plate on the tip side. The duct structure for air conditioning according to claim 1, wherein a locking piece is provided to prevent the shaft from coming off.