JPH09132022A - Air passage change-over device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the magnitude of noise to a small one, which is developed by a membrane shaped member because of vibration caused by the vibration of a driving means when the membrane shaped member is moved in the air passage change-over device making the change-over of an air passage by moving the membrane shaped member formed with an opening part through which air passes, in the air passage. SOLUTION: A first pulley 21 is connected with a drive shaft 15, a first rigid plate 41 is connected with the first pulley 21, and an elastic body 27 is fixed onto the first rigid plate 41 at its one side surface. A second rigid plate 42 connected with a step motor 20 is also fixed onto the elastic body 27 at its other side surface. By this constitution, since vibration generated by the step motor 20 can be absorbed by the elastic body 27, the magnitude of noise can thereby be made small.

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 for switching an air passage by moving, in an air passage, a film member having an opening through which air passes.

[0002]

2. Description of the Related Art As a conventional technique using the above-described air passage switching device in a vehicle air conditioner, for example, Japanese Patent Laid-Open No. 5-3.
The one disclosed in Japanese Patent No. 10029 is known. In this structure, both ends of a flexible film-shaped member such as a plastic film are wound around a drive shaft and a driven shaft that are rotatably provided in an air conditioning duct. A pulley is connected to each of the shafts coaxially with the shaft, and both ends of the thread member are wound around the pulleys. A drive means for rotating the drive shaft is connected to the drive shaft.

When the drive shaft rotates in the direction of winding the film member, the drive shaft directly takes up the film member and the film member moves. On the contrary, when the drive shaft rotates in the direction of delivering the film-shaped member, the rotation of the drive shaft is transmitted to the driven shaft through the pulleys and the thread-shaped member, and the driven shaft rotates in the direction of winding the film-shaped member. -Shaped member is wound around the driven shaft,
Moving.

As described above, by constructing the film-like member so that it can be moved both forward and backward in the air-conditioning duct, the blow-out air passage into the vehicle interior can be freely changed.

[0005]

DISCLOSURE OF THE INVENTION By the way, as a result of studying the case where a step motor is used as the driving means, the present inventors have found that the following problems occur. That is, since the step motor operates based on the pulse signal output from the control device, torque fluctuations matching the pulse frequency occur, and relatively large vibrations are generated.

In the above conventional air conditioner, the drive shaft is rotated with a low resistance with respect to the air conditioning duct.
There is some clearance between the drive shaft and the air conditioning duct. When the vibration generated by the step motor is transmitted to the drive shaft connected to the step motor, the drive shaft can move in the clearance,
Due to the vibration from the step motor, the drive shaft vibrates in the rotation axis direction and the radial direction.

As a result, the vibration of the drive shaft is transmitted to the flexible film member wound around the drive shaft, and the film member vibrates, so that the film member acts as a vibration source. It becomes a speaker with a built-in speaker, which causes a problem that vibration noise of the step motor is amplified. The problem of vibration noise amplification as described above does not occur only when the drive shaft is driven by the step motor, but also occurs when the drive shaft is driven by the servo motor, for example.

In view of the above problems, the present invention provides an air passage switching device for switching air passages by moving a membrane member having an opening through which air passes in the air passage. It is an object of the present invention to suppress the magnitude of noise generated from the film-shaped member due to the vibration of the driving means for moving the.

[0009]

In the invention described in claims 1 to 10, the rotary member (15, 21, 41) is rotationally driven by the drive means (20, 42),
In the air passage switching device configured to move the membrane member (19) in the air passage, the drive means (20, 4) is provided.
2) and the rotary member (15, 21, 41) which is rotationally driven by the drive means (20, 42).
0, 42) to absorb the vibration generated by the vibration absorbing member (2
6, 27) are connected.

Therefore, the vibration generated by the driving means (20, 42) is absorbed by the vibration absorbing member (26, 27), so that the vibration energy of the driving means (20, 42) is absorbed by the film member (19). The amount transmitted as vibration energy can be suppressed. Therefore, the magnitude of the noise generated from the film-shaped member (19) due to the vibration of the driving means (20, 42) can be reduced.

Particularly, in the invention according to claim 7, the vibration absorbing member is made of an elastic body (26, 27), and between the rotating member (15, 21, 41) and the driving means (20, 42). Rotating member (15, 21, 41) and driving means (20,
42) is provided with a restricting mechanism (P, Q) for restricting the relative rotation amount to a predetermined amount (2θ ₂ ).

Therefore, when the driving means (20, 42) is loaded with a torque several times that of the normal operation, the elastic bodies (26, 27) as the vibration absorbing members are deformed, but the driving means (20, 42). ) And the rotation member (15, 21, 41) can be regulated to a predetermined amount.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment in which the present invention is applied to a vehicle air conditioner will be described with reference to FIGS. 1 to 6. First, the structure of the air conditioning unit of the first embodiment is shown in FIG.
It will be described based on.

The vehicle air conditioner in this embodiment comprises a centrifugal fan 1a, a driving means (specifically, a blower motor, not shown) for driving the centrifugal fan 1a, and a blower case 1b for accommodating the centrifugal fan 1a. Blower 1
Is provided. An air conditioning duct 2 as an air passage for guiding the air from the blower 1 into the vehicle compartment is connected to the air downstream side portion of the blower 1. An evaporator 6 as a cooling means for cooling the air is arranged in the air-conditioning duct 2, and an air downstream side portion of the evaporator 6 serves as a heating means for heating the cold air from the evaporator 6. The heater core 7 is provided.

The evaporator 6 is a heat exchanger that constitutes a well-known refrigeration cycle together with a compressor, a condenser, and a pressure reducing means. The heater core 6 is a heat exchange through which engine cooling water for cooling the engine flows. It is a vessel. Further, on the air downstream side of the air conditioning duct 2, a defroster outlet 3 for blowing the conditioned air toward the inner surface of the windshield,
A face outlet 4 for blowing out conditioned air toward the upper half of the occupant in the passenger compartment and a foot outlet 5 for blowing out conditioned air toward the feet of the occupant are formed.
By forming these outlets 3 to 5 in the air conditioning duct 2, conditioned air passes through the defroster outlet 3 in the air conditioning duct 2, conditioned air passes through the face outlet 4, and Air-conditioned air is foot outlet 5
An air passage is formed therethrough. Each of these outlets 3, 4,
5 are arranged so as to be aligned on a straight line.

In the air conditioning duct 2, a warm air passage 8 is a passage through which the cool air from the evaporator 6 flows through the heater core 7.
And a bypass passage 9 that is a passage through which the cool air from the evaporator 6 bypasses the heater core 7. At the end of the hot air passage 8, a rotating member as claimed in the claims, and further, a drive shaft 10 as a film member supporting means is provided rotatably with respect to the air conditioning duct 2 in the direction perpendicular to the plane of FIG. At the end of the bypass passage 9, a sub-rotating member as claimed in the claims, and further, a driven shaft 11 as a film-like member supporting means are provided rotatably with respect to the air conditioning duct 2 in a direction perpendicular to the plane of FIG. There is.

Then, the drive shaft 10 is configured to rotate by driving the step motor 13 as the driving means in the claims. This step motor 13
Is driven based on a pulse signal of a predetermined frequency (300 Hz in this embodiment) sent from a controller (not shown). An elastic body (not shown) as a vibration absorbing member and a regulation mechanism (not shown) are provided between the drive shaft 10 and the step motor 13 in the claims. ,
The specific structure and assembly structure of the elastic body and the regulation mechanism will be described later in detail with respect to the drive shaft 15 and the step motor 2.
No. 0, the elastic body 27, and the regulating mechanism P are the same, and thus the description thereof is omitted.

On the drive shaft 10, one end of a film door 12 as a film-like member in the claims is wound, and the other end of the film door 12 is wound on a driven shaft 11. The film door 12 is made of NPS woven fabric bonded to both sides of a PPS film, and is wound around the drive shaft 10 and the driven shaft 11 so that the warm air passage 8 and the bypass passage can be maintained at a constant tension. It is stretched across 9. The film door 12 is pressed against the heater core case 30 provided on the side surface of the heater core 7 by the tension.

Further, the film door 12 is formed with an opening (not shown) for allowing air to pass therethrough. When the film door 12 moves between the drive shaft 10 and the driven shaft 11, the opening is warmed. The ratio of opening the passage 8 and the bypass passage 9 changes, and the temperature of the conditioned air blown out from each of the outlets 3 to 5 is adjusted by this.

In addition, both ends of each of the outlets 3 to 5 in the air conditioning duct 2, specifically, the end of the face outlet 4 opposite to the defroster outlet 3 and the foot outlet 5, At the end opposite to the defroster outlet 3, a drive shaft (rotating member, film-shaped member supporting means) 15 and a driven shaft (sub-rotating member, film-shaped member support) having the same structure as the drive shaft 10 and the driven shaft 11 are provided. Means) 16
Is rotatably provided with respect to the air conditioning duct 2.
The drive shaft 15 is a step motor (drive means) 20.
It is configured to rotate by the drive of. The step motor 20 is driven based on a pulse signal of a predetermined frequency (300 Hz in this embodiment) sent from a control device (not shown).

Between the drive shaft 15 and the step motor 20, an elastic body 27 (see FIG. 3) as a vibration absorbing member and a regulating mechanism P (see FIG. 3) are used.
Is provided. The specific configuration and assembly structure of the drive shaft 15, the step motor 20, the elastic body 27, and the regulation mechanism P will be described in detail later. Also,
Guide roller shafts (membrane member supporting means) 17 and 18 are provided at intermediate positions between the defroster outlet port 3 and the face outlet port 4 in the air conditioning duct 2 and at intermediate positions between the defroster outlet port 3 and the foot outlet port 5. 1 is rotatably provided with respect to the air conditioning duct 2 in the direction perpendicular to the plane of FIG.

On the drive shaft 15, one end of a film door (membrane member) 19 is wound, and the other end of the film door 19 is wound on a driven shaft 16.
The film door 19 is wound around the shafts 15 and 16 and supported by the guide roller shafts 17 and 18, so that each of the air outlets 3 to 3 is supported with a constant tension.
It is stretched so as to face No. 5.

Further, as shown in FIG. 2, the film door 19 is formed with openings 19a and 19b for allowing air to pass therethrough, and the film door 19 moves between the drive shaft 15 and the driven shaft 16. As a result, the state in which the openings 19a and 19b open and close the defroster outlet 3, the face outlet 4, and the foot outlet 5 is changed, whereby the outlet mode is selectively determined.

A cold air bypass door 14 is provided at the upper portion of the driven shaft 11 in the air conditioning duct 2 in FIG. 1 so as to be rotatable between a solid line position and a two-dot chain line position in the figure. . This door 14 moves to the position of the chain double-dashed line during maximum cooling, and guides the cool air from the evaporator 6 to the face outlet 4. Next, the first pulley (rotating member, film member supporting means) 21, the second pulley (sub rotating member, film member supporting means) 22, the wire 24, and the spring means 25 (FIG. 3).
A specific configuration (see (2)) will be described with reference to FIG. The contents described below are the same as the configurations of the first pulley, the second pulley, the wire, and the spring means provided on the drive shaft 10 and the driven shaft 11.

As shown in FIG. 2, a hole 15a having a D-shaped cross section is formed at one end of the drive shaft 15.
The shaft portion 21a having a D-shaped cross section of the first pulley 21 is fitted into the hole portion 15a. As a result, the first pulley 2
1 is locked against the drive shaft 15. In addition, in all the mating surfaces having a D-shaped cross section, which will be described later,
The member forming the shaft portion having the D-shaped cross section is prevented from rotating with respect to the member forming the hole portion having the D-shaped cross section.

A second pulley 22 is connected to the driven shaft 16 via a connecting shaft (sub-rotating member, film member supporting means) 23 which is a separate component from the second pulley 22, and both pulleys 21 and 22 are connected. A wire 24 as a thread member is laid between the two. Therefore, the step motor 20 (FIG. 1,
3) by the drive shaft 15 and the first pulley 21
2 rotates in the R direction in FIG. 2, the film door 19 is wound by the drive shaft 15. At this time, the film shaft 19 is wound around the drive shaft 15, so that the driven shaft 16 and the second pulley 22 rotate in the R direction in FIG. And the second pulley 22 is R
The second pulley 22 winds the wire 24 by rotating in the direction.

On the contrary, when the drive shaft 15 and the first pulley 21 are rotated in the direction opposite to the R direction in FIG. 2 by the step motor 20, the first pulley 21 moves the wire 2
Wind up 4. As a result, the second pulley 22 and the driven shaft 16 rotate in the direction opposite to the R direction, and the driven shaft 16 winds up the film door 19. The end portion of the connecting shaft 23 on the driven shaft 16 side is formed in a substantially D-shaped cross section, and this end portion is inserted into a hole portion 16 a formed in the end surface of the driven shaft 16 and having a substantially D-shaped cross section. Has been done. An engaging claw (not shown) is formed at the end of the connecting shaft 23, and the engaging claw is engaged with the engaging hole 16b when the connecting shaft 23 is inserted into the hole 16a. As a result, the connecting shaft 23 is prevented from coming off.

A portion of the connecting shaft 23 on the second pulley 22 side has a hole 22a formed at the center of the second pulley 22.
Is inserted inside. The diameter of the hole 22a is equal to the diameter of the connecting shaft 2.
The diameter is set to be slightly larger than the diameter of the portion of the third pulley 22 on the side of the second pulley 22, so that the second pulley 22 is rotatable with respect to the connecting shaft 23. Further, as shown in FIG. 3, one end of the coil spring 25 is fixed to the second pulley 22, and the other end of the coil spring 25 is fixed to the connecting shaft 23. As a result, the driven shaft 16
Rotation of the second pulley 2 via the coil spring 25.
2 or the rotation of the second pulley 22 is transmitted to the driven shaft 16 via the coil spring 25.
Further, the coil spring 25 includes the driven shaft 16, the film door 19, the drive shaft 15, and the first pulley 2.
It has a function of always applying a predetermined tension to the mechanism formed by the wire 1, the wire 24, the second pulley 22, and the coil spring 25.

Next, the shafts 15 and 16, the film door 19, the step motor 20, the pulleys 21 and 2,
2, the assembly structure of the elastic body 27, the regulation mechanism P, and the wire 24 to the air conditioning duct 2 will be described with reference to FIGS. 3 and 4. In addition, FIG. 3 shows the above-mentioned 15, 16 and
Assembling each of 19, 20, 22, and 24,
It is sectional drawing seen from the air upstream side to the downstream side.

Here, for convenience of drawing drawing, the outlet 3,
The air conditioning ducts 2 near 4 and 5 are omitted. Further, FIG. 4 is an enlarged view showing an assembly structure of the elastic body 27 and the regulation mechanism P according to the present invention. The contents described below are the drive shaft 10, the driven shaft 11, the film door 12,
It is the same as the assembly structure of the motor 13, the pulley, the elastic body, and the regulation mechanism.

As shown in FIG. 3, the shaft portion 31a of the bearing bush 31 made of resin is press-fitted into the hole 2a formed in the air conditioning duct 2. And this shaft portion 31a
Has a hole 15b formed at the center of the drive shaft 15.
Is loosely fitted. A shaft portion 21a of the first pulley 21 is loosely fitted in a hole portion 2b formed in the air conditioning duct 2, and the shaft portion 21a is fitted in a hole portion 15a formed at the center of the drive shaft 15. ing.

A hole 21b having a D-shaped cross section formed at the center of the first pulley 21 has a D-shaped cross section formed at the center of the first rigid plate (rotating member, film member supporting means) 41. The shaft portion 41b of is fitted. Then, one side surface of the elastic body 27 made of a rubber member, an elastomer resin or the like is adhered to the first rigid plate 41 with an adhesive or the like, and the second rigid plate 42 is attached to the other side surface of the elastic body 27. It is adhered with an adhesive or the like. And
A tip end of a shaft portion 20a having a D-shaped section is inserted into a recess 42b having a D-shaped section formed at the center of the second rigid plate 42. As a result, the second rigid plate 42 is integrally connected to the step motor 20.

Further, the air conditioning duct 2 is formed with three columnar projections 2e (only two of which are shown in FIG. 3) integrally with the air conditioning duct 2, and the case of the step motor 20 is formed. 20d is a screw 33 on the columnar protrusion 2e.
Has been fixed by. The motor built-in portion 20b of the step motor 20 is not shown in cross section. FIG.
As shown in, the shaft portion 34a of the bearing bush 34 made of resin is press-fitted into the hole portion 2c formed in the air conditioning duct 2. The tip of the shaft portion 34a is loosely fitted in a hole portion 16c formed at the center of the driven shaft 16.

Further, the hole 2d formed in the air conditioning duct 2
A connecting shaft 23 is loosely fitted in the hole 23.
6a is fitted. One end side and the other end side of the wire 24 are wound around the first pulley 21 and the second pulley 22, respectively. The second pulley 22 and the connecting shaft 23 are connected via a coil spring 25. The coil spring 25 is not shown in cross section.

Here, the first part, which is the main part of the first embodiment,
Rigid body plate 41, elastic body 27, second rigid body plate 42
The shape and the assembling structure will be described in detail with reference to FIG. As shown in FIG. 4, the first rigid plate 41 has a shaft 41b projecting from the center of the disc-shaped part 41c, and a disk centered on the shaft 41b of the disc-shaped part 41c. The grooves 41a, 41a are formed on the circumference. Further, in the second rigid plate 42, the recess 42b is formed at the center of the disc-shaped portion 42d, and
At a position facing the grooves 41a, 41a of the rigid plate 41, a rod-shaped portion 42a protruding toward the first rigid plate 41 side,
42a are formed.

Here, as shown in FIG. 6, the groove 41 is formed.
The length (l) of the a and 41a in the circumferential direction is configured to be longer than the diameter (d) of the tip portions 42c and 42c of the rod-shaped portions 42a and 42a.
42c is loosely fitted in the grooves 41a, 41a. Here, since the step motor 20 rotates both forward and backward, the second rigid plate 42 rotates both forward and backward with respect to the first rigid plate 41. Therefore, even if the second rigid plate 42 rotates forward or backward with respect to the first rigid plate 41,
The grooves 41a, 41a are extended on both sides by a predetermined amount with respect to the diameter (d) of the tip portions 42c, 42c so that the relative rotation amount between the second rigid plate 42 and the first rigid plate 41 becomes θ. .

The grooves 41a, 41a and the rod portion 42 are formed.
The restriction mechanism P according to the present invention is constituted by a and 42a. The columnar elastic body 27 is arranged so as to fill the space formed by the disc-shaped portion 41c and the disc-shaped portion 42d facing each other, and both sides of the elastic body 27 are disc-shaped. It is adhered to the portion 41c and the disc-shaped portion 42d.

In the elastic body 27, the rod-shaped portion 42 is provided around each of the rod-shaped portions 42a, 42a and the recess 42b.
a, 42a, and the concave portion 42b, the holes 27a,
Through holes 27b, 27b are formed. Next, based on FIG. 3, the drive shaft 15, the first pulley 21, the first pulley
Rigid body plate 41, elastic body 27, second rigid body plate 42
The order of assembling the step motor 20 to the air conditioning duct 2 will be briefly described.

First, the drive shaft 15 is placed in the air conditioning duct 2 at the position shown in FIG.
5a and the hole 15b, the shaft portion 21 of the first pulley 21
a and the shaft portion 31a of the bearing bush 31 are inserted. Here, the shaft portion 31 a of the bearing bush 31 is provided in the air conditioning duct 2
Of the first pulley 21 is press-fitted and fixed in the hole 2a formed in the right half of the above, and the shaft portion 21a of the first pulley 21 is loosely fitted in the hole 2b formed in the left half of the air conditioning duct 2. .

Of the assembled body in which the elastic body 27, the first rigid plate 41 and the second rigid plate 42 are integrally assembled beforehand with an adhesive or the like, the shaft portion 41b of the first rigid plate 41 is the first pulley. The hole 21 b of the hole 21 is fitted. Then, the shaft portion 20a of the step motor 20 is fitted into the recess 42b of the second rigid plate 42,
The case 20d of the step motor 20 is fixed to the columnar protrusion 2b with screws 33.

As described above, in the first embodiment, since the second rigid plate 42 and the first rigid plate 41 are connected by the elastic body 27, a pulse signal is output from the step motor 20. Even when the step motor 20 vibrates, the vibration of the first pulley 21 in the rotation axis direction (left-right direction in FIG. 3) and the radial direction of the first pulley 21 (direction perpendicular to the rotation axis direction) due to this vibration. The vibration is absorbed by the elastic body 27. That is, since the amount of vibration energy of the step motor 20 transmitted as the vibration energy of the film door 19 is suppressed, amplification of vibration noise of the step motor 20 can be efficiently reduced.

Actually, as shown in FIG.
The frequency of the one in which the step motor 20 and the first pulley 21 are directly connected without providing the elastic body 27 (conventional air conditioner for vehicle) and the one in FIG. 3 (vehicle air conditioner of the first embodiment) As a result of analyzing the noise and measuring the noise level, FIG.
The data shown in FIG. 5 and the data shown in FIG.

In FIG. 5, 300, 450, 6
The peaks appearing at 00, 750, 1200 Hz, etc. indicate the vibration component of the step motor 20, and the hatched portion in the figure is the sliding sound component generated by the friction between the film door 19 and the air conditioning duct 2. Further, the overall value (value indicating the magnitude of noise) of that of FIG. 11 is 42.9d.
In BA, the overall value of that of FIG. 3 is 37.5 dB.
It was confirmed to be A.

As described above, in the first embodiment, the overall value of 5.4 dBA can be reduced as compared with the conventional apparatus shown in FIG. 10. From this, also by providing the elastic body 27, the step motor 20 It was confirmed that the amplification of vibration noise was reduced. Further, the inventors of the present invention have made noise (hereinafter referred to as X
11), noise when the film door 19 is removed from the one shown in FIG. 11 (hereinafter referred to as Y), the screw 33 and the case 20d are removed from the columnar protrusion 2b of FIG. The magnitude of noise (hereinafter referred to as Z) was measured when 20b was fixed and the shaft portion 20a was arranged at the position shown in FIG. Here, Z is the vibration of the step motor 20 from the case 20d to the columnar protrusion 2b.
The noise is shown when the noise is not transmitted to the air conditioning duct 2 through the.

As a result, X was extremely smaller than Y and Z, and Z was larger than Y. That is, X << Y <Z. Therefore, it was confirmed that reducing the amount of vibration of the step motor 20 transmitted to the film door 19 can more efficiently reduce the amplification of vibration noise of the step motor 20. Also from the above two types of experiments, by providing the elastic body 27 as in the first embodiment to reduce the amount of the vibration energy of the step motor 20 transmitted to the film door 19, the noise due to the vibration of the step motor 20 is reduced. It can be seen that can be greatly reduced.

Further, in the first embodiment, since the regulating mechanism P is provided between the first rigid plate 41 and the second rigid plate 42, the following effects are obtained. The film door 19 may perform a so-called initialization process for controlling the stop position, for example, after the ignition switch is turned off, the step motor 20 is operated so that the film door 19 is entirely wound around one of the shafts. . In this case, the shaft portion 2 of the step motor 20
0a is loaded with several times as much torque as in normal operation.

That is, during the initialization process, the step motor 20 rotationally drives the drive shaft 15 until the film door 19 is completely wound around the drive shaft 15, for example. Here, if the regulation mechanism P is not provided, the film door 19 is entirely wound and cannot move any more, so that the drive shaft 15, the first pulley 21 and the first rigid plate 41 do not rotate any more. The shaft portion 20a of the step motor 20 and the second rigid plate 42 rotate relative to the first rigid plate 41 because the elastic body 27 is deformable. At this time, a large torque is applied to the shaft portion 20a of the step motor 20.

Then, after the ignition switch is turned on, when the film door 19 is stopped again at a certain control position (blowing mode), the shaft portion 20a of the step motor 20 is rotated by a large amount by the relative rotation amount, which is not shown. It must be controlled by the controller. However, since the deformation amount of the elastic body 27 changes depending on the temperature and the like, the relative rotation amount is not constant. Therefore, the control device cannot accurately stop the film door 19 at the control position.

However, in the first embodiment, the regulating mechanism P is provided between the first rigid plate 41 and the second rigid plate 42.
Is provided. Therefore, at the time of normal operation, as shown in FIG. 6A, the tip portions 42c and 42c of the rod-shaped portions 42a and 42a of the second rigid plate 42 are aligned with the grooves 4 of the first rigid plate 41.
While the elastic body 27 is deformed and the second rigid plate 42 is rotated relative to the first rigid plate 41 during the initialization process, it is located substantially in the center of 1a and 41a. ), The tip portions 42c, 42c contact the wall surfaces of the grooves 41a, 41a, and the rotation of the second rigid plate 42 is locked with the second rigid plate 42 rotated by an angle θ in the figure with respect to the first rigid plate 41. It

As a result, the relative rotation amount becomes a rotation of a predetermined amount of angle θ, and by controlling by a controller (not shown) such that the shaft portion 20a of the step motor 20 rotates more by the predetermined amount of angle θ, the film The door 19 can be accurately moved to the control position. here,
The predetermined amount of angle θ is set within a range in which the elastic body 27 can always be deformed by the torque load during the initialization process.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIGS. 7 is an enlarged perspective view of the shaft portion 20a of the step motor 20 (see FIG. 3), and FIG. 8 is an enlarged perspective view of the first pulley 21. 9A is a cross-sectional view of the step motor 20 and the first pulley 21 portion, and FIG. 9B is a front view of the shaft portion 20a of the step motor 20 in FIG.
(C) is the shaft portion 21c of the first pulley 21 in (a).
It is the front view which looked at from the arrow B.

In the second embodiment, the assembling structure other than the main part is the same as that of the first embodiment, and the explanation thereof will be omitted. First, as shown in FIG. 7, the shaft portion 20 of the step motor 20 is
A first slit 53 is formed at the tip of the shaft portion 20a substantially perpendicularly to the tip surface 20c of the shaft portion 20a, whereby the semi-cylindrical portions 20e, 2e are formed at the tip portion of the shaft portion 20a.
0f is formed. Further, the one semi-cylindrical portion 20
On the tip surface 20c of the shaft portion 20a on the e side, the first pulley 2
A fan-shaped first protrusion 51 that protrudes to the first side (right side in FIG. 9A) is integrally formed.

Further, as shown in FIG. 8, the first pulley 2
A shaft portion 21c protruding toward the step motor 20 side (left side in FIG. 9A) is formed at the center of 1. And
A second slit 54 is formed at the tip of the shaft 21c substantially perpendicularly to the tip surface 21d of the shaft 21c, whereby the semi-cylindrical portion 21e is formed at the tip of the shaft 21c. , 21f are formed. Further, a fan-shaped second protruding portion 52 protruding toward the step motor 20 side (left side in FIG. 9A) is integrally formed on the tip surface 21d on the side of the one semi-cylindrical portion 21f.

Further, FIG. 10 shows a coil spring (linear elastic body) 26 as a vibration absorbing member according to the present invention. One end 26a and the other end 26 of this coil spring 26
b extends to the radial center side of the coil spring 26. Then, as shown in FIG. 9A, the tip end surface 20c of the shaft portion 20a on the semi-cylindrical portion 20f side and the projecting surface 52a of the second projecting portion 52 are opposed to each other, and the semi-cylindrical portion 21e of the shaft portion 21c. Side end surface 21d and the protruding surface 5 of the first protruding portion 51
In a state where the coil spring 26 and the coil 1a are opposed to each other, one end 26a of the coil spring 26 shown in FIG. 7 is inserted into the first slit 53 of the step motor 20, and the other end 26b thereof is inserted into the second slit 54 of the first pulley 21. ing. As a result, the shaft portion 20a of the step motor 20 and the shaft portion 2 of the first pulley 21 are
1c is connected by a coil spring 26.

The shape of the tip surface 51a of the first protrusion 51 is
As shown in FIG. 9B, it corresponds to the fan having the spread angle θ ₁ and is provided at the position of the angle θ ₂ with respect to the first slit 53. The shape of the tip end surface 52a of the second projecting portion 52 is the same as the tip end surface 51a of the first projecting surface 51, as shown in FIG. This first
The protruding portion 51 and the second protruding portion 52 constitute the regulation mechanism Q according to the present invention.

The order of assembling the first pulley 21, the coil spring 26 and the step motor 20 to the air conditioning duct 2 will be briefly described below. First, the first pulley 21 is assembled to the air conditioning duct 2 as in the first embodiment, and then one end of the coil spring 26 is attached to the first slit 53 provided in the first pulley 21 in FIG. 9A. 26a is inserted. Then, the tip surface 20c of the shaft portion 20a on the semi-cylindrical portion 20f side and the protruding surface 52 of the second protruding portion 52.
a while facing the front end surface 21d of the semi-cylindrical portion 21e of the shaft portion 21c and the protruding surface 51a of the first protruding portion 51, the coil spring 2 in the second slit 54.
The other end 26b of 6 is inserted.

Then, as in the first embodiment, the step motor 20 is provided with the columnar projection 2b of the air conditioning duct 2 (see FIG. 3).
The coil spring 26 is attached to the shaft portion 20a of the step motor 20 and the first pulley 21.
It is fixed along the outer peripheral surface of the shaft portion 21c. As described above, in the second embodiment, since the step motor 20 and the first pulley 21 are connected by the coil spring 26 as the vibration absorbing member, a pulse signal is output from the step motor 20 and the step motor 20 is output. 20
Vibration of the shaft portion 20a of the step motor 20 in the rotation axis direction (left and right direction in FIG. 3) and vibration of the shaft portion 20a of the step motor 20 in the radial direction (direction perpendicular to the rotation axis direction). Are absorbed by the coil spring 26. Therefore, it is also possible to prevent the film door 19 from vibrating through the first pulley 21 and the drive shaft 15.

Therefore, the problem that a large noise is generated from the film door 19 due to the vibration of the step motor 20 is prevented. Further, the first slit 53 and the second slit 54 have one end 26 a and the other end 26 of the coil spring 26.
Since it can be assembled to the outer peripheral portion of the step motor 20 and the first pulley 21 only by inserting and fitting b, the assembly can be easily carried out without using a special assembly work or assembly parts. In addition, the step motor 20 and the drive shaft 15
There is no need for a space for the assembly portion of the coil spring 26 on the outer peripheral portion of the coil spring 2 and the space for the coil spring 2 can be saved.
6 can be assembled.

Further, when the shaft portion 20a of the step motor 20 rotates relative to the shaft portion 21c of the first pulley 21 due to the torque load during the initialization process, the coil spring 26 expands with the rotation amount. When the step motor 20 rotates by an angle 2θ _{2 with} respect to the first pulley 21, the side surface 55 of the first protruding portion 51 and the side surface 56 of the second protruding portion 52 of the step motor 20 come into contact with each other to lock the rotation. .

As a result, the relative rotation amount is always a predetermined amount of rotation of the angle 2θ ₂ , and control is performed by a controller (not shown) so that the shaft portion 20a of the step motor 20 rotates a large amount by the predetermined amount of angle 2θ _2. Thus, the film door 19 can be accurately moved to the control position. Here, the predetermined amount of angle 2θ ₂ is set within a range in which the coil spring 26 can always expand due to the torque load during the initialization process.

(Third Embodiment) In FIG. 11, the first
The first pulley 21 may be used as the vibration absorbing member in the present invention by forming the pulley 21 itself with a rubber member, an elastomer resin or the like. By doing so, the vibration of the step motor 20 is absorbed by the first pulley 21, so that the film door 19 is prevented from vibrating through the drive shaft 15.

(Fourth Embodiment) In the present embodiment, FIG.
2, the film door 19 is formed in an annular shape, and the inner peripheral surface of the film door 19 is connected to the drive shaft 15 and
By supporting a plurality of (for example, three) guide roller shafts (film-shaped member supporting means) 28a, 28b, 28c, the film door 19 is stretched in a state of facing each of the air outlets 3 to 5. There is. The drive shaft 15 of the present embodiment is rotationally driven by a step motor (not shown) as in the first embodiment, and the drive shaft 15 and the step motor are disposed between the drive shaft 15 and the step motor as described in the first embodiment. Such an elastic body and a regulation mechanism are provided.

A large number of meshing holes (not shown) are formed around the both ends of the film door 19, and a large number of projections (not shown) meshing with the meshing holes are formed at both ends of the drive shaft 15. The rotation of the drive shaft 15 is transmitted to the film door 19 by the protrusion and the meshing hole so that the film door 19 is rotated.

As described above, even in the case where the annular film door 19 is moved by the drive shaft 15, by providing the elastic body and the regulating mechanism, the same effect as that of the first embodiment can be obtained. (Other Embodiments) In the above first embodiment, the elastic body 27 is bonded to the first rigid plate 41 and the second rigid body plate by an adhesive.
The first rigid body plate 41 and the second rigid body plate 42 are opposed to each other as shown in FIG. 4 and fixed by a jig, and they are put into a predetermined mold, and a rubber member or an elastomer is fixed. By pouring and hardening resin or the like, the first rigid plate 41 and the elastic body 2 as shown in FIG.
7. The assembly body including the second rigid plate 42 may be integrally formed.

In the second embodiment, the divergence angle θ _{1 of} the first projecting portion 51 and the second projecting portion 52 and the angle θ ₂ with respect to the slits 53 and 54 are equal, but the present invention is not limited to this. There is no. That is, the divergence angle of each of the first protruding portion 51 and the second protruding portion 52 and each slit 53, so that the relative rotation amount between the shaft portion 20a of the step motor 20 and the shaft portion 21c of the first pulley 21 becomes a predetermined amount. The angle with respect to 54 may be set.

In the first to fourth embodiments, the guide roller shafts 17 and 18 (see FIG. 1) rotatably provided with respect to the air conditioning duct 2 or the guide roller shafts 28a, 28b and 28c ( Although the film door 19 is supported by (see FIG. 12), the present invention is not limited to this, and a fixed guide fixed to the air conditioning duct 2 is provided so that the film door 19 is supported by this fixed guide. Good. The fixed guide and the film door 1
It is preferable to select the shape, surface roughness, material and the like of the fixed guide so as to reduce the frictional resistance with the fixed guide 9.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a part of FIG.

FIG. 3 is a cross-sectional view showing a main part of FIG.

FIG. 4 is a perspective view showing a main part of FIG.

5A is a graph showing the noise level of the conventional apparatus, and FIG. 5B is a graph showing the noise level of the above-described embodiment.

FIG. 6A is an enlarged view of the vicinity of the regulation mechanism during normal operation,
FIG. 6B is an enlarged view of the vicinity of the regulation mechanism during the initialization process.

FIG. 7 is an enlarged perspective view of a step motor according to a second embodiment of the present invention.

FIG. 8 is an enlarged perspective view of a first pulley according to the second embodiment of the present invention.

9A is a cross-sectional view of a main part in the second embodiment of the present invention, FIG. 9B is an enlarged view of the step motor viewed from arrow A in FIG. 9A, and FIG. 9C is an arrow in FIG. It is an enlarged view of the 1st pulley seen from B.

FIG. 10 is an enlarged view of a coil spring according to a second embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a main part of a conventional technique.

FIG. 12 is a schematic cross-sectional view near a film door according to a fourth embodiment of the present invention.

[Explanation of symbols]

2 ... Air conditioning duct, 15 ... Drive shaft (rotating member, film member supporting means), 16 ... Drive shaft (rotating member, film member supporting means), 17, 18 ... Guide roller shaft (film member supporting means), 19 ... Film door (membrane member), 20
... step motor (driving means), 21 ... first pulley (rotating member, film member supporting means), 22 ... second pulley (sub rotating member, film member supporting means), 23 ... connecting shaft (sub rotating member, Membrane member supporting means), 27 ... Elastic body (vibration absorbing member), 41 ... First rigid plate (rotating member, film member supporting means), 42 ... Second rigid plate (driving means),
P, Q ... Regulatory mechanism.

Claims (10)

[Claims] 1. An opening (19a, 19a) through which air passes.
The flexible film-like member (19) on which b) is formed is replaced with a film-like member supporting means (15, 21, 41, 16, 22, 23) provided with at least one rotating member (15, 21, 41). ,
17, 18) is stretched across the air passage, and the rotating member (15, 21, 41) is rotationally driven by the driving means (20, 42).
An air passage switching device configured to move the film member (19) in the air passage, the rotating member (15, 21, 41) and the driving means (2).
0, 42) are connected by a vibration absorbing member (26, 27) that absorbs the vibration generated by the driving means (20, 42). 2. Membrane member supporting means (15, 21, 4)
1, 16, 22, 23, 17, 18) is provided with a sub-rotating member (16, 22, 23), and one end of the membranous member (19) has the rotating member (15,
21 and 41) and is wound around the membrane member (19).
The air passage switching device according to claim 1, wherein the other end of the air passage is wound around the sub-rotating member (16, 22, 23). 3. The air passage switching device according to claim 1, wherein the vibration absorbing member (26, 27) is made of an elastic body (26, 27). 4. The air passage switching device according to claim 3, wherein the elastic body (26, 27) comprises a rubber member (27). 5. The air passage switching device according to claim 3, wherein the elastic bodies (26, 27) are linear elastic bodies (26). 6. The air passage switching device according to claim 5, wherein the linear elastic body (26) comprises a coil spring (26). 7. The rotating member (1) is attached to the rotating member (15, 21, 41) and the driving means (20, 42).
5, 21, 41) and a regulation mechanism (P, Q) for regulating the relative rotation amount between the driving means (20, 42) to a predetermined amount (θ, 2θ ₂ ). Item 3
7. The air passage switching device according to any one of 1 to 6. 8. The drive means (20, 42) comprises a first plate-shaped member (42) which rotates with the rotation of the drive means (20, 42), and the rotary member (15, 42). 21, 41) includes a second plate-like member (41) that rotates with the rotation of the rotating member (15, 21, 41), and the restriction mechanism (P, Q) includes the first member. Rod-shaped member (42a, 42a, which is provided integrally with the plate-shaped member (42), and which protrudes toward the second plate-shaped member (41).
42a) and the rod-shaped member (42) of the second plate-shaped member (41).
a, 42a) and a groove (41a, 41a) having a length longer than the diameter of the tip end portion (42c, 42c) of the rod-shaped member (42a, 42a) by a predetermined amount. Tip portions (42c, 4a) of the rod-shaped members (42a, 42a)
The air passage switching device according to claim 7, wherein 2c) is fitted in the groove (41a, 41a). 9. The drive means (20, 42) rotates with the rotation of the drive means (20, 42), and a first shaft portion protruding toward the rotary member (15, 21, 41). (2
0a), the rotary member (15, 21, 41) rotates with the rotation of the rotary member (15, 21, 41) and protrudes toward the drive means (20, 42) side. 2 shaft part (21c)
The regulation mechanism (P, Q) has a first protrusion that protrudes from the tip end surface (20c) of the first shaft portion (20a) toward the rotating member (15, 21, 41). (51) and a second protruding portion (5) protruding from the tip end surface (21d) of the second shaft portion (21c) toward the drive means (20, 42).
2) and a projecting surface (52) formed at the tip surface (20c) of the first shaft portion (20a) and the tip of the second projecting portion (52).
a) so that the tip surface (21d) of the second shaft portion (21c) and the protrusion surface (51a) formed at the tip of the first protrusion (51) face each other. Arranged, the first shaft portion (20a) and the second shaft portion (21c)
Is when the relative rotation amount reaches a predetermined amount (2θ ₂ ),
The side surface (55) of the first projecting portion (51) and the side surface (56) of the second projecting portion (52) are arranged in such a position that they come into contact with each other. The air passage switching device described. 10. The drive means (20, 42) comprises a step motor (20).
10. The air passage switching device according to any one of items 1 to 9.