JP3343935B2 - Air passage switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air passage switching device in which an opening of an air passage portion is changed according to the movement of a film member. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air passage switching device configured to connect a pulley to each winding shaft and to extend a wire between the pulleys in order to rotate a pair of connected winding shafts in a synchronized state.

[0002]

2. Description of the Related Art In recent years, in an air passage switching device provided in an automobile air conditioner, a ventilation mode switching damper, an air mix damper and the like are provided with a film damper using a film-like member made of a flexible material such as a plastic film. It is considered that the structure is simplified, the overall weight is reduced, the size is reduced, and the like.

In this type of air passage switching device, both ends of the film damper are connected to different winding shafts in order to move the film damper in the forward and reverse directions. In order to rotate the pulleys in synchronization with each other, a pulley is connected to each winding shaft, and a wire is stretched between the pulleys. The pulley used in this case has a drum portion having a width capable of winding the wire in a state where the wire is aligned plural times or more, and a pair of wires provided integrally on both sides of the drum portion for preventing the wire from coming off. And a flange portion.

[0004]

In the case of using a pulley having a simple shape as described above, there is a possibility that a so-called turbulent winding state occurs in the process of winding the wire around the drum portion of the pulley. When such a turbulent state occurs,
The newly wound wire may bite between the already wound wires, which may cause abnormal noises, hinder the rotation of the pulley, and hinder the movement of the film damper. In order to cope with such a problem, it is considered to form a spiral groove on the surface of the drum portion in which the winding wire is sequentially accommodated. However, a pulley provided with such a spiral groove has a complicated shape. This leads to an increase in manufacturing costs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a situation in which a wire becomes turbulent in a process of winding the wire around the pulley without complicating the shape of the pulley. An object of the present invention is to provide an air passage switching device that can be effectively prevented.

[0006]

Means for Solving the Problems The present invention, in order to achieve the above object, a film member for varying the opening of the air passage portion in response to movement while facing the air passage, the A pair of winding shafts connected to both ends of the film-shaped member and selectively moving the film-shaped member in the forward and reverse directions according to its own rotation, and a pair of pulleys respectively connected to these winding shafts,
An air passage switch including a wire wound between these pulleys to rotate the winding shafts in a synchronized state, and a drive unit for rotating at least one of the winding shafts to move the film-shaped member. in the device, the pulley, and a drum portion for winding the wire, after a structure in which a pair of flanges for preventing the edge of the wire provided on both sides of the drum unit, the drum unit of the axial dimension, and sets the rollable dimensions in a state where the wire aligned over a plurality of times, the one of the pair of flange portions, and the thick while that bulges to the other flange portion side The thick part is formed , especially the thick part
An end is provided adjacent to the beginning of winding of the wire,
Up to the end of the thick part while following the thick part
So that it can be wound around the ram, and
The wire wound on the drum after the end is already wound
As guided by the wire being taken up
It has a simple shape.

[0007]

[0008] In the air passage switching device according to the first aspect , the wire wound around the drum portion of the pulley is the most.
The first round, that is, up to the end of the thick part, follows the thick part.
While being wound up on the drum part. Here the thick part
The wire wound on the drum after the end is already
Winded by the wire being wound
Since it has a shape such as, 2 weeks onward, i.e. wires wound in new <br/> other, thereby preventing overlying the previously wound wire as described above. This allows
Each orbiting wire is wound around the drum unit in an aligned state, thereby preventing the wire from being turbulently wound. Further, even if the spiral groove is not provided in the drum portion as in the conventional configuration, the wire can be wound around the drum portion in an aligned state, so that there is no danger of complicating the shape of the pulley.

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to an automotive air conditioner.
It will be described with reference to FIG surface for one embodiment.

In FIG. 4, which shows a schematic cross-sectional structure of an automotive air conditioner, a defroster outlet 3 is formed at the most downstream side of a duct 2 provided with a blower 1 at the most upstream portion. A face air outlet 4 and a foot air outlet 5 are formed on both sides of 3. The above outlets 3 to 5 are
The defroster outlet 3 is provided for blowing out conditioned air toward the windshield, and the face outlet 4 is provided for blowing out conditioned air toward the upper body of the occupant. The foot outlet 5 is provided for blowing out conditioned air to the feet of the occupant.

In the duct 2, an evaporator 6 for cooling air is disposed near the blower 1, and a heater core 7 is disposed downstream of the evaporator 6 and on a bottom side of the duct 2. In this case, the heater core 7
Is provided in a form orthogonal to the evaporator 6,
Thereby, an air mix ventilation passage 8 and a bypass ventilation passage 9 (each corresponding to an air passage portion of the present invention) separated by the heater core 7 are formed in the duct 2.

The air mix ventilation passage 8 is located on the upstream side of the heater core 7, and the air passing therethrough is heated by flowing through the heater core 7 to become hot air. Also,
The bypass ventilation passage 9 is provided for flowing the air cooled by the evaporator 6 without flowing through the heater core 7.

Air mix ventilation passage 8 in duct 2
The take-up shafts 10 and 11 are rotatably supported at positions facing the lower end portion and at positions facing the upper end portion of the bypass ventilation passage 9, respectively. The winding shafts 10 and 11 are connected to both ends of an air mix film damper 12 corresponding to a film-like member according to the present invention.
The film damper 12 can be selectively moved in the forward and reverse directions according to the forward and reverse rotations of 0 and 11. Note that one of the winding shafts 10 is directly rotated by a motor 13 (corresponding to a driving means in the present invention) having a built-in speed reduction mechanism.
The other winding shaft 11 is configured to be rotated by the motor 13 via a pulley and a wire (not shown).

The film damper 12 is made of, for example, a flexible polyethylene resin.
By being bridged between the air passages 11, they are provided in a state in which they correspond to both the air mix ventilation passage 8 and the bypass ventilation passage 9 and are in contact with the end surface of the heater core 7 on the evaporator 6 side.

Although not shown, an opening is formed at a predetermined position of the film damper 12, and this opening is
By selectively opposing one or both of the air mix ventilation path 8 and the bypass ventilation path 9 in accordance with the movement of the film damper 12, the openings of the ventilation paths 8 and 9 are changed. In addition, the ratio between the amount of air blown through the air mix air passage 8 and the amount of air blown through the bypass air passage 9 can be arbitrarily adjusted according to such a change in the opening degree. The winding shaft 1 in the duct 2
1 is provided with a plate-shaped damper 14 for cooling air bypass. The plate-shaped damper 14 is rotated to a position shown by a two-dot chain line in the figure at the time of maximum cooling, and the evaporator 6 is turned on.
Is guided to the defroster outlet 3 and the face outlet 4 side.

On the other hand, a position facing the blower 1 end of the face outlet 4 and a position facing the heater core 7 end of the foot outlet 5 in the duct 2 are respectively provided.
The winding shafts 15 and 16 are rotatably supported. Also,
A guide roller shaft 1 is provided at each of an intermediate position between the defroster outlet 3 and the face outlet 4 and an intermediate position between the defroster outlet 3 and the foot outlet 5 in the duct 2.
7 and 18 are rotatably supported with a predetermined gap between the duct 2 and the duct 2. On the winding shafts 15 and 16,
Both ends of a film damper 19 for switching a blowing mode corresponding to the film-like member according to the present invention are connected, and the film damper 19 can be selectively moved in the forward and reverse directions according to the forward and reverse rotation of the winding shafts 15 and 16. It can be moved to.

The film damper 19 is made of, for example, a flexible polyethylene resin.
By being stretched between the guide roller shafts 17 and 18 and the duct 2 between the ducts 16, it is provided so as to be movable in a state facing the defroster outlet 3, the face outlet 4 and the foot outlet 5. ing.

As shown in FIG. 3, the film damper 19 has a plurality of first openings 19a selectively facing the face outlet 4, and selectively has the defroster outlet 3 and the foot outlet 5. A plurality of opposed second openings 19b are formed with a predetermined dimension in the moving direction of the film damper 19 and separated from each other. Thereby, the first opening 19a is selectively made to face the face outlet 4 in accordance with the movement of the film damper 19, and the second opening 19b is connected to one or both of the defroster outlet 3 and the foot outlet 5. The openings of the air outlets 3 to 5 can be changed by selectively opposing the air outlets, and a plurality of types of air blowing modes can be obtained according to such changes in the opening.

The air blowing mode is a DEF mode in which air is blown only from the defroster outlet 3, and the defroster outlet 3
FOOT / DE that blows air from both the foot outlet 5
F mode, FOOT that blows air only from foot outlet 15
There are five modes: a BI-LEVEL mode that blows air from both the face outlet 14 and the foot outlet 15, and a FACE mode that blows air only from the face outlet 14.

FIG. 3 is an exploded perspective view schematically showing a main part of FIG. 4 in a partially omitted state in order to facilitate understanding of parts related to the gist of the present invention. Hereinafter, description will be made with reference to FIG.

That is, a motor 20 (corresponding to a driving means in the present invention) having a built-in deceleration mechanism at one end thereof is connected to the winding shaft 15, and a first pulley 21 is provided at the other end thereof in a detented state. Are linked. Also, the winding shaft 16 has the first
A second pulley 22 is connected to the end on the same side as the pulley 21 in a non-rotating state, and a wire 23 is stretched between these pulleys 21 and 22. In this case, the winding direction of the wire 23 with respect to the first pulley 21 and the second pulley 22 is the winding shaft 15 corresponding to each of the pulleys 21 and 22.
And 16 are set to be opposite to the winding direction of the film damper 19.

Therefore, when the winding shaft 15 and the first pulley 21 are rotated in the direction of arrow A in FIG. 3 by the motor 20, the winding shaft 15 is wound with the film damper 19. The shaft 16 and the second pulley 22 are also rotated in the direction of arrow A, and accordingly, the second pulley 22
Will wind up the wire 23 sent out from the first pulley 21. On the contrary, the winding shaft 1 is
5 and the first pulley 21 are rotated in the direction opposite to the arrow A, the second pulley 22 and the winding shaft 16 move in the direction opposite to the arrow A in response to the wire 23 being wound around the first pulley 21. The film damper 19 is wound around the winding shaft 16. As a result,
By rotating the motor 20 forward and backward, the film damper 19 can reciprocate in the forward and reverse directions.

Incidentally, as shown in FIG.
9 is provided with a row of through holes 19c along the moving direction thereof.
4 (see FIG. 4) or other detection means to detect the moving position of the film damper, and to control the moving position of the film damper 19 based on such detection information. It is supposed to do.

Now, the specific structure of the first pulley 21 will be described below with reference to FIGS. The description of the second pulley 22 is omitted because it has a shape symmetrical to that of the first pulley 21.

FIGS. 2 (a), 2 (b) and 2 (c) show the first
Each state of the pulley 21 as viewed from above, from the front, and from below is shown. In FIG. 2, the first pulley 21 includes a drum 25 for winding the wire 23 and a pair of flanges 26 and 27 integrally provided on both sides of the drum 25 for preventing the wire 23 from coming off. And a configuration including In this case, the axial dimension d of the drum unit 25 is set to a dimension that allows the wire 23 to be wound in a state where the wires 23 are aligned more than once.

A slit 28 for holding the winding start end of the wire 23 is formed in one of the flange portions 26.
Both the the are from the outer periphery of the flange portion 26 is formed so as to extend to the drum unit 25, the wire guide portion 29a that bulges to the drum portion 25 side (the other flange portion 27 side)
In a direction opposite to the winding start end of the wire 23 (a dimension corresponding to a half circumference of the drum section 25 in this embodiment).
Is formed. That is,
The thick portion 29 is formed on one flange portion 26 so as to be thick while bulging toward the other flange portion 27, and the terminal end portion 29 b of the thick portion 29 is formed by winding the wire 23.
In this case, the wire 23 is thickened up to the end portion 29b of the thick portion 29 in this case.
It is taken up by the drum part 25 along the meat part 23,
The thick portion 29 is wound around the drum portion 25 after the terminal portion 29b.
The wire 23 to be unwound is the wire 2 already wound up.
It is shaped so as to be guided and wound by 3 .

FIG. 1 shows that the first pulley 21 has a wire 2
3 is schematically shown in a state of being wound up a plurality of times.
As can be understood from FIG. 1, the wire 23 whose winding start end is held by the slit 28 is wound around the drum portion 25 of the first pulley 21 during winding.
The starting portion extends along the wire guide portion 29a formed in the thick portion 29 of the one flange portion 26 while the drum portion 25
Is guided in the direction of the center of the circle.
At the time of winding the wire 23, the wire 2
3 is the first round, that is, the end portion 29 of the thick portion 29
Wind up the drum 25 along the thick part 29 until b
Can be

For this reason, the newly wound wire 23
Is not overlapped on the wire 23 already wound as described above, and is guided by the wound wire 23 instead of the above-described guide by the thick portion 29 . Accordingly, each of the orbiting wires 23 is sequentially wound around the drum unit 25 in an aligned state, thereby preventing the wire 23 from being turbulently wound. Therefore, the newly wound wire 23 does not bite between the already wound wires 23, which may cause an abnormal noise or hinder the rotation of the pulleys 21 and 22 and the movement of the film damper 19. Will be gone. Moreover, in order to sequentially wind the wire 23 in the aligned state on the drum portion 25 in this manner, it is only necessary to provide the thick portion 29 on the flange portion 26. Therefore, a spiral groove as in the conventional configuration is formed on the surface of the drum portion 25. There is no need to provide
This eliminates the possibility that the shapes of the pulley 21 and the second pulley 22 are complicated.

The film damper 12 for air mix is used.
The pulleys (not shown) provided on the take-up shafts 10 and 11 corresponding to the above are also configured in the same shape as the first pulley 21.

[0031]

[0032]

[0033]

[0034] Incidentally, the winding shaft 1 forming a Above you施例pairs
0, 11 and 15 and 16 are connected to the motor 13 or 20 respectively.
However, for example, a wire (not shown) stretched between the winding shafts 10 and 11 and a wire 23 stretched between the winding shafts 15 and 16 are fed using a motor. A configuration in which both of the winding shafts 10, 11 and 15, 16 are indirectly driven to rotate by feeding and driving by the device may be employed.

In addition, the present invention is not limited to the above-described embodiments. For example, the present invention is not limited to an air conditioner for an automobile, but can be widely applied to general equipment having a function of adjusting an opening degree of an air passage. However, various modifications can be made without departing from the scope of the invention.

[0036]

According to the present invention, as is apparent from the above description, the flange portion for preventing the wire of the pulley from coming off is provided.
Meanwhile By adopting the configuration of forming the thick portion,
In the process of winding the wire around the pulley, it is possible to effectively prevent the wire from becoming turbulent, without complicating the shape of the pulley, and to prevent the wire from winding.
Form a groove on the ram to align the wire
It is no longer necessary to complicate the shape of the pulley.
It has an excellent effect of becoming.

[Brief description of the drawings]

Schematic view showing a main portion of an embodiment of the present invention; FIG

FIG. 2 shows a configuration of a pulley, where (a) is a top view,
(B) is a front view and (c) is a bottom view.

FIG. 3 is an exploded perspective view schematically showing a main part partially omitted.

FIG. 4 is a cross-sectional view showing a schematic structure of a vehicle air conditioner.

[Explanation of symbols]

In the figure, 2 is a duct, 8 is an air mix ventilation path (air passage section), 9 is a bypass ventilation path (air passage section), 10, 11
Is a winding shaft, 12 is a film damper (membrane member), 13 is a motor (driving means), 15 and 16 are winding shafts, 19 is a film damper (membrane member), 20 is a motor (driving means),
21 is a first pulley, 22 is a second pulley, 23 is a wire,
25 is a drum portion, 26 and 27 are flange portions, 28 is a slit (holding portion), 29 is a thick portion, and 29a is a wire guide.
Indicates a part .

Claims (1)

(57) [Claims] 1. A film-like member which changes an opening degree of an air passage according to movement in a state facing an air passage, and said film which is connected to both ends of the film-like member and rotates according to its own rotation. A pair of winding shafts for selectively moving the shape member in the forward and reverse directions, and a pair of pulleys respectively connected to these winding shafts,
An air passage switch including a wire wound between the pulleys to rotate the winding shafts in a synchronized state, and a driving unit for rotating at least one of the winding shafts to move the film-shaped member. In the apparatus, the pulley is configured to include a drum unit for winding the wire, and a pair of flange portions provided on both sides of the drum unit for preventing the wire from coming off. The axial dimension of the wire is set to a size that can be wound up in a state where the wire is aligned a plurality of times or more, and one of the pair of flange portions is thickened in a state of being bulged toward the other flange portion side. The end of this thick part is adjacent to the winding start end of the wire.
The thick portion is provided so as to be in contact with the end portion of the thick portion.
Wound on the drum portion while along, the thick section, the winding on the drum part on or after the end
Wire is already wound
An air passage switching device, wherein the air passage switching device is shaped so as to be taken in and taken up .