JPH09156347A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a film-shaped member to be constantly acted upon by a fixed tensile force by preventing the condition of the tensile force on a tension spring from varying. SOLUTION: A cable 20 is provided between a first pulley 18 which rotates as a winding drive shaft 11 is rotated by a stepping motor and a second pulley 19 which rotates a winding driven shaft 12 via a tension spring by rotating almost in synchronization with the first pulley 18. The portion of the cable 20 between the first and second pulleys is secured to one end of a plate 27 in such a way that it can be wound up, the other end of the plate 27 being fitted into a guide groove formed in one side of a duct. When the tension on the cable 20 increases, the plate 27 moves along the guide groove in a direction for decreasing the tension, thereby varying the length of the cable 20 present between the first 18 and second 19 pulleys.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that employs a so-called film damper system in which a ventilation condition is changed by a film member.

[0002]

2. Description of the Related Art In recent years, in order to achieve the downsizing of a vehicle air conditioner, instead of switching a plate-shaped switching door to change the ventilation state, the ventilation state is changed by moving a membrane member. The so-called film damper system has come to be adopted.

In this film damper system, for example, as shown in FIGS. 5 (a), 5 (b) and 5 (c), the film member 100 is arranged so as to face the blowout opening 101 of the air conditioning unit. Depending on the degree of overlap between the opening portion 102 and the blowout opening portion 101 formed at the outlet, the blowout opening portion 10
The opening area of No. 1 is adjusted. One end side of the film member 100 is fixed to a winding drive shaft 103 rotatably supported by the air conditioning unit, and the other end side of the film member 100 corresponds to the rotation of the winding drive shaft 103. It is fixed to the rotating take-up driven shaft 104.

A step motor (not shown) is connected to the axially distal end of the winding drive shaft 103, and the winding drive shaft 103 is rotated by driving the step motor to wind the film member 100. The wind-up state is changed by sending out or changing the winding state, and the position of the opening 102 of the film-like member 100 is moved to change the ventilation state.

Specifically, a first pulley 105 is provided at the axial tip of the winding drive shaft 103. on the other hand,
A second pulley 107 is provided at the axial end of the take-up driven shaft 104 via a tension spring 106 so as to be rotatable relative to the take-up driven shaft 104. The first pulley 105 and the second pulley 107 are connected to the cable 108.
The second pulley 107 is synchronized with the rotation of the first pulley 105 by this cable 108.
Is configured to rotate.

The tension spring 106 is maximally twisted in the forward direction when the film-shaped member 100 is maximally wound around the winding driven shaft 104, and the film-shaped member 100 is wound around the winding driving shaft. It is set so as to be maximally twisted in the negative direction when maximally wound around 103. In addition, the cable 108 is the film-shaped member 1.
00 is maximally wound around the winding driven shaft 104 and is maximally wound around the first pulley 105, and is maximally wound around the winding drive shaft 103 when the film-shaped member 100 is maximally wound around the first pulley 105. It is set so as to be maximally wound around the second pulley 107. Furthermore, even when the cable 108 is maximally wound around the first pulley 105 or the second pulley 107, the first pulley 105 and the second pulley 107 have the same winding diameter so that the first winding diameter is the same. Each winding surface of the pulley 105 and the second pulley 107 is formed wide.

Next, the film member 10 of the winding drive shaft 103.
The winding operation and the feeding operation of 0 will be described. First, as shown in FIG. 5A, the film drive member 103 is in a state in which the film member 100 is wound up to the minimum, and the driven shaft 104 is wound in the film device 100 to the maximum. In this state, the tension spring 106 at this time is in a state in which it is twisted in the maximum forward direction, and the winding drive shaft 103 starts the winding operation from this state. Therefore, in this state, the tension spring 10
Since 6 is in a state where it is twisted in the maximum forward direction,
The operation force with which the winding drive shaft 103 winds the film member 100 is maximized.

When the apparent shaft diameter of the winding drive shaft 103 including the film member 100 in this state is d, and the apparent shaft diameter of the winding driven shaft 104 including the film member 100 is d + t _MAX , the step When the film-shaped member 100 is wound by driving the motor to rotate the winding drive shaft 103 in the forward direction (the direction of the solid line arrow in the figure) (hereinafter referred to as forward rotation), the first pulley is moved along with this winding operation. 105 also rotates forward and the cable 108 wound around the first pulley 105 (see FIG.
In the case of the state (a), the cable 108 is maximally wound around the first pulley 105). Then, along with the winding operation of the winding drive shaft 103, the winding driven shaft 10
4 rotates in the forward direction to move from the winding driven shaft 104 to the film member 100.
Is sent to the winding drive shaft 103, and the second pulley 107 also rotates forward to wind up the cable 108 sent from the first pulley 105.

At this time, when the winding drive shaft 103 makes one rotation, the winding drive shaft 103 winds up the film-shaped member 100 of about 2πd. Along with this, the second pulley 107 rotates in synchronization with the first pulley 105, so that the second pulley 107 also makes one rotation. On the other hand, about 2π of the winding drive shaft 103
Along with the winding operation of the film-shaped member 100 of d, the film-shaped member 100 of about 2πd from the winding driven shaft 104 is wound by the winding drive shaft 10.
However, since the apparent shaft diameter of the take-up driven shaft 104 is larger than the apparent shaft diameter of the take-up drive shaft 103 by t _MAX , the take-up driven shaft 104 rotates by a little less than one rotation. Will be done. That is, the second pulley 107
Makes one rotation, and the take-up driven shaft 104 connected to the second pulley 107 rotates a little less than one revolution. Therefore, there is a difference in rotation between the rotation of the second pulley 107 and the take-up driven shaft 104. And the take-up driven shaft 104 moves to the second pulley 10
It rotates in the clockwise direction of FIG.

The difference in rotation between the rotation of the second pulley 107 and the rotation of the take-up driven shaft 104 is the tension spring 106 (note that the tension spring 106 is shown in FIG.
In the state of (a), it is in a state where it is twisted to the maximum in the positive direction) and is absorbed by being loosened. In other words, the tension spring 106 acts so as to reduce the tension of the film member 100. As a result, when the stepping motor rotates the winding drive shaft 103 in the forward direction to wind the film-shaped member 100, the tension spring 106 drives the winding drive shaft 103 in the normal rotation direction in a direction in which the tension spring 106 loosens. Membrane member 1
00 to reduce the load on the step motor.

From this state, when the winding drive shaft 103 is further driven to rotate and the film-shaped member 100 is wound, as shown in FIG.
As shown in (b), the apparent shaft diameter of the winding drive shaft 103 including the film member 100 is d + t ₁ , and the apparent shaft diameter of the winding driven shaft 104 including the film member 100 is d + t ₂ ( t ₂
> T ₁ ), as t ₁ gradually increases and t ₂ gradually decreases, the winding drive shaft 103 is rotationally driven in a direction in which the tension spring 106 loosens, and the tension spring 106 bends the film member 100. Although the operating force of the film member 100 is gradually reduced, the winding drive shaft 1
As the apparent shaft diameter of No. 03 and the apparent shaft diameter of the take-up driven shaft 104 become equal, the apparent shaft diameter difference (t ₂ −
Since t ₁ ) gradually decreases, the second pulley 107
The rotation difference between the rotation of the winding driven shaft 104 and the rotation of the winding driven shaft 104 is gradually reduced, and the winding drive shaft 103 including the film member 100 is rotated.
Winding driven shaft 1 including the apparent shaft diameter and the film member 100
When the apparent shaft diameters of 04 are equal (t ₁ = t ₂ ), the tension spring 106 is in the maximum loosened state.

From this state, when the winding drive shaft 103 is further rotationally driven to perform the winding operation of the film-shaped member 100, the apparent shaft diameter of the winding drive shaft 103 including the film-shaped member 100 is changed to the film. It becomes larger (t ₁ > t ₂ ) than the apparent shaft diameter of the winding driven shaft 104 including the member 100. At this time, when the winding drive shaft 103 makes one rotation, the winding drive shaft 103 moves about 2 times.
The film member 100 of π (d + t ₁ ) is wound up. Along with this, the second pulley 107 rotates in synchronization with the first pulley 105, so that the second pulley 107 also makes one rotation.

On the other hand, about 2π (d + t) of the winding drive shaft 103
Along with the winding operation of the film-shaped member 100 of ₁ ), the film-shaped member 100 of about 2π (d + t ₁ ) is sent from the winding driven shaft 104 to the winding drive shaft 103. The shaft diameter of 104 is smaller than the shaft diameter of the winding drive shaft 103 by (t ₁ −
Since it is smaller by t ₂ ), the take-up driven shaft 104 rotates only slightly more than one rotation. That is, the second pulley 107
Makes one rotation, and the take-up driven shaft 104 connected to the second pulley 107 rotates by a little more than one rotation. Therefore, there is a difference in rotation between the rotation of the second pulley 107 and the rotation of the take-up driven shaft 104. And the take-up driven shaft 104 moves to the second pulley 10
7 is rotated in the counterclockwise direction in FIG.

The difference in rotation between the rotation of the second pulley 107 and the rotation of the winding driven shaft 104 is absorbed by the tension spring 106 being twisted in the negative direction. In other words, the tension spring 106 acts so as to increase the tension of the film member 100. As a result, the step motor moves to the winding drive shaft 103.
When the film-shaped member 100 is wound by rotating the film-shaped member 100, the tension spring 106 rotates the winding drive shaft 103 so as to twist the tension spring 106 in the negative direction. Gradually increase,
Gradually increase the load on the step motor.

Then, the stepper motor drives the winding drive shaft 10
When the film-shaped member 100 is maximally wound around the winding-up drive shaft 103 as shown in FIG. 5C by further driving the film-shaped member 3 in the forward rotation, the tension spring 106 is twisted in the negative direction to cause the film-shaped member 100 to rotate. The operating force of is maximum, and the load of the step motor is maximum.

On the other hand, the winding drive shaft 1 for the film member 100
03 from the maximum winding state, the film-shaped member 100 is sent out to the winding driven shaft 104, and from the state of FIG. 5C to FIG.
When the winding driven shaft 104 winds up the film-shaped member 100 from the state of FIG. 5A to the state of FIG. When the winding drive shaft 103 is rotated in the reverse direction (hereinafter, referred to as reverse rotation) and the first pulley 105 is rotated in the reverse direction, the cable 108 maximally wound around the second pulley 107 is transferred to the first pulley 105. 105 is wound up. Then, the winding drive shaft 10
3, the film-shaped member 100 wound up to the maximum is the winding driven shaft 10
4, the driven shaft 104 winds up the film-shaped member 100.

The cable 10 of this first pulley 105
With the winding operation of 8, the second pulley 107 also rotates in the reverse direction in synchronization with the first pulley 105. At this time, when the take-up driven shaft 104 makes one rotation, the take-up drive shaft 103 moves about 2πd.
Of the film-shaped member 100, and the winding driven shaft 104 winds up the film-shaped member 100 of about 2πd along with the operation of sending out the film-shaped member 100 of about 2πd from the winding drive shaft 103. Since the apparent shaft diameter of the take-up drive shaft 103 is larger than the apparent shaft diameter of the take-up driven shaft 104 by t _MAX , the take-up driven shaft 104 rotates by a little less than one rotation. That is, the second pulley 107 makes one rotation,
The winding driven shaft 10 connected to the second pulley 107.
Since 4 rotates a little less than one rotation, the second pulley 107
And a rotation of the take-up driven shaft 104 causes a rotation difference, and the take-up driven shaft 104 rotates in the counterclockwise direction in FIG. 5C relative to the second pulley 107. Become.

The difference in rotation between the rotation of the second pulley 107 and the rotation of the winding driven shaft 104 is the tension spring 106 (note that the tension spring 106 is shown in FIG.
In the state of (c), it is in a state in which it is twisted in the maximum negative direction) and is absorbed by being loosened. In other words, the tension spring 106 acts so as to reduce the tension of the film member 100. As a result, when the stepping motor drives the winding drive shaft 103 in the reverse rotation direction to wind the cable 108, the winding spring drive shaft 103 is driven in the reverse rotation direction in the direction in which the tension spring 106 loosens, so that the tension spring 106 is The operation force of the film member 100 is reduced, and the load of the step motor is reduced.

From this state, if the winding drive shaft 103 is further driven to rotate in the reverse direction to wind the cable 108, as shown in FIG.
As shown in (b), the apparent shaft diameter of the winding drive shaft 103 including the film member 100 is d + t ₁ , and the apparent shaft diameter of the winding driven shaft 104 including the film member 100 is d + t ₂ ( t ₁
> T ₂ ), the winding drive shaft 103 is rotationally driven in a direction in which the tension spring 106 loosens as t ₂ gradually increases and t ₁ gradually decreases, and the tension spring 106 bends the film member 100. Although the operating force of the film member 100 is gradually reduced, the winding drive shaft 1
03, the apparent shaft diameter difference of the take-up driven shaft 104 becomes equal, and the apparent shaft diameter difference (t ₁ −t ₂ ) gradually decreases. Therefore, the second pulley 107 rotates and winds. The difference in rotation between the rotation of the take-up driven shaft 104 and the rotation of the take-up driven shaft 104 gradually becomes smaller. If the shaft diameters of the two are the same (t ₁ = t ₂ ), the tension spring 106 is in the maximum loosened state.

From this state, when the winding drive shaft 103 is further driven to rotate and the cable 108 is wound up, as shown in FIG.
As shown in (b), the apparent shaft diameter of the winding drive shaft 103 including the film member 100 is d + t ₁ , and the apparent shaft diameter of the winding driven shaft 104 including the film member 100 is d + t ₂ ( t ₂
> T ₁ ), and when the winding drive shaft 103 is reversely rotated to wind up the cable 108, the film-shaped member 100 sent out from the winding drive shaft 103 is taken up by the winding driven shaft 104. When the take-up drive shaft 103 makes one rotation, the take-up driven shaft 104 winds up the film-shaped member 100 of about 2π (d + t ₁ ). As a result, the second pulley 107 rotates in synchronization with the first pulley 105, so that the second pulley 1
07 also rotates once. On the other hand, about 2π of the take-up driven shaft 104
With the winding operation of the film member 100 of (d + t ₁ ),
Membrane member 1 about 2π (d + t ₁ ) from the winding drive shaft 103
00 will be sent to the winding driven shaft 104,
The apparent shaft diameter of the take-up driven shaft 104 is the take-up drive shaft 103.
Since it is larger than the apparent shaft diameter by t ₂ −t ₁ , the take-up driven shaft 104 rotates a little less than one rotation. In other words, the second pulley 107 makes one rotation, and the take-up driven shaft 104 connected to the second pulley 107 makes a little less than one revolution. Therefore, the rotation of the second pulley 107 and the take-up driven shaft 104 are reduced. A rotation difference occurs between the rotation and the take-up driven shaft 1
04 is relative to the second pulley 107 in FIG.
It rotates in the counterclockwise direction of (b).

The difference in rotation between the rotation of the second pulley 107 and the rotation of the winding driven shaft 104 is absorbed by the tension spring 106 being twisted in the forward direction. In other words, the tension spring 106 acts so as to increase the tension of the film member 100. As a result, the step motor moves to the winding drive shaft 103.
When the cable 108 is wound in reverse by driving the
Since the winding drive shaft 103 is reversely rotated so as to twist the tension spring 106 in the positive direction, the tension spring 106 gradually increases the operation force of the film-shaped member 100 and gradually increases the load of the step motor.

Then, the stepper motor drives the winding drive shaft 10
When the cable 108 is maximally wound around the winding drive shaft 103 as shown in FIG. 5A by driving the film 3 in the reverse direction, the tension spring 106 is twisted in the positive direction to operate the film-shaped member 100. Is maximum and the load on the step motor is maximum.

As described above, when the tension spring 106 is provided between the second pulley 107 and the winding driven shaft 104, the film-shaped member 100 is always given some tension. Therefore, the film-shaped member 100 does not bend more than necessary, the film-shaped member 100 comes into pressure contact with the opening edge of the blowing opening 101, and the sealing property of the blowing opening 101 is ensured. It is possible to prevent the occurrence of noise, wind leakage, turbulence in the vehicle interior temperature, and the like, which are caused by the bending of the member 100.

[0024]

However, when the tension spring 106 is provided as described above, the problem that occurs when the tension spring 106 is not provided can be solved, but the film-shaped member 100 is moved. The operation force fluctuates.

That is, as shown in FIG. 6, the film-shaped member 100
Apparent shaft diameter of the winding drive shaft 103 including the film and the film-shaped member 1
In the case where the apparent shaft diameter of the take-up driven shaft 104 including 00 is the same (t ₁ = t ₂ ), the take-up drive shaft 103 is the film member 10.
When the operating force for winding 0 and the operating force for winding the film-shaped member 100 sent out from the winding drive shaft 103 by the winding driven shaft 104 are F ₀ , respectively, the apparent shaft diameters are equal to each other. The operating force with which the drive shaft 103 winds the film member 100 increases from F ₀ to F _MAX . On the other hand, the operation force with which the winding driven shaft 104 winds up the film-shaped member 100 fed from the winding drive shaft 103 in a state where the apparent shaft diameters are equal to each other also increases from F ₀ to F _MAX .

As described above, the tension spring 106 acts so as to be twisted in the negative direction as the film-shaped member 100 is maximally wound around the winding drive shaft 103 from the state in which the apparent shaft diameters are equal to each other. The maximum operating force F when the winding drive shaft 103 winds the film member 100
_MAX is required. On the other hand, the film-shaped member 10 sent from the winding drive shaft 103 in a state where the apparent shaft diameters are the same.
Since the tension spring 106 acts so as to be twisted in the positive direction as the take-up driven shaft 104 is wound up to the maximum, the maximum operation force (in the state where the take-up driven shaft 104 winds up the film member 100 at the maximum ( In this case, an operation force F _MAX for winding the cable 108 by the winding drive shaft 103 is required.

Therefore, the winding drive shaft 103 and the winding driven shaft 104 wind up the film-shaped member 100 to wind the film-shaped member 10.
In order to be able to move 0, the maximum operating force F
_It is necessary to use a stepper motor with _MAX . Here, for example, a step motor having an operating force of F _MAX has a problem that it is larger and more expensive than a step motor having an operating force of F ₀ . Further, when the step motor becomes large, there arises a problem that this type of vehicle air conditioner also becomes large. Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to prevent a change in the tension state of the tension spring so that a constant tension always acts on the film-shaped member.

[0028]

In order to solve the above-mentioned problems, the present invention relates to the first aspect of the invention, in which the first drive device rotates as the winding drive shaft 11 is rotated by the drive means 21.
The rotation transmission means 20 is provided between the pulley 18 and the second pulley 19 that rotates so as to be substantially synchronized with the rotation of the first pulley 18 and rotates the take-up driven shaft 12 through the tension applying means 26. And the rotation transmission means 2
It is provided with axial distance varying means 27, 28 for varying the distance between the first pulley 18 and the second pulley 19 of 0.

Therefore, when the film-shaped member 200 is rotated around the winding drive shaft 11 by the drive means 21,
As the first pulley 18 rotates, the winding drive shaft 1
The winding driven shaft 12 rotates in association with the winding operation of No. 1 to send out the film-shaped member 200. Further, the second pulley 19 also rotates so as to be substantially synchronized with the rotation of the first pulley 18. At this time, when the apparent shaft diameter of the winding drive shaft including the film-shaped member 200 and the apparent shaft diameter of the winding driven shaft including the film-shaped member 200 are different, the rotation and the winding of the second pulley 19 are performed. A rotation difference is generated between the rotation of the driven shaft 12 and the distance between the first pulley 18 and the second pulley 19 of the rotation transmission means 20 is changed by the inter-axis distance varying means 27, 28. The rotation difference is absorbed by the change in the distance, and the winding driven shaft 12 rotates integrally with the second pulley 19, so that the tension of the film-shaped member 200 accompanying the winding operation is always constant.

Therefore, the tension of the film member 200 can be made constant at all times, and the operation force associated with the winding operation of the film member 200 by the drive means 21 is always made constant, so that the appropriate operation force is obtained. It becomes possible to use the drive means 21 having the above, and it becomes possible to manufacture this type of vehicle air conditioner at a small size and at a low cost. Further, in the second aspect of the invention, the intermediate portion of the rotation transmitting means 20 is fixed to the one end portion of the plate 27 which is not fitted into the guide groove 28 so as to be able to be wound up, and the plate 27 has the tension of the rotation transmitting means 20. When the winding drive shaft 11 or the winding driven shaft 12 is wound, the film member 200 is arranged so as to move along the guide groove 28 so as to reduce the tension when the winding force increases. Even if the apparent shaft diameter of the take-up drive shaft 11 including the film and the apparent shaft diameter of the take-up driven shaft 12 including the film member 200 are different, if the tension of the rotation transmission means 20 is increased, the plate 27 Moves along the guide groove 28 so as to reduce the tension, so that there is no difference in rotation between the rotation of the second pulley 19 and the rotation of the winding driven shaft 12.

Therefore, the axial distance varying means 27, 28
Is composed of a guide groove 28 arranged on one side surface of the duct and a plate 27 inserted so as to be movable along the guide groove 28. The rotation transmitting means is provided at one end of the plate 27 which is not inserted into the guide groove 28. The tension of the film-shaped member 200 can be always kept constant by a simple structure in which the intermediate portion of 20 is fixed so that the film-shaped member 200 can be wound up. Since the force is always constant, it becomes possible to use the drive means 21 having an appropriate operating force, and this type of vehicle air conditioner can be manufactured in a small size and at low cost.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the overall configuration of a vehicle air conditioner of the present invention. In FIG. 1, the vehicle air conditioner has a duct 1 forming an air passage for guiding air into the vehicle interior. The duct 1 is made of a resin material such as polypropylene. A blower 2 that generates an air flow toward the passenger compartment is disposed inside the duct 1 at an upstream side of the duct 1. At the upstream side of the blower 2, the air taken into the duct 1 is the air inside the vehicle (inside air) or the air outside the vehicle (outside air).
An inside / outside air switching means (not shown) for deciding whether to set is set.

Inside the duct 1, an evaporator 3 for cooling the air passing therethrough is arranged at the air downstream side of the blower 2. The evaporator 3 serves as a refrigerant evaporator of a refrigeration cycle (not shown) mounted on a vehicle. In this refrigeration cycle, a compressor that compresses the refrigerant by the driving force of the engine into a high-temperature and high-pressure vapor-phase refrigerant, a condenser that condenses and liquefies the vapor-phase refrigerant, and an expansion valve that expands this liquefied refrigerant under reduced pressure And an evaporator 3 for evaporating the depressurized refrigerant.

Inside the duct 1, a heater core 4 for heating a predetermined amount of the air cooled by the evaporator 3 is arranged at a downstream side of the air inside the evaporator 3. The heater core 4 is a heating heat exchanger that uses engine cooling water as a heat source. Further, a bypass passage 5 is provided in the duct 1 so that the air passing through the evaporator 3 bypasses the heater core 4.

In this duct 1, on the air upstream side of the heater core 4 and in the bypass passage 5, the amount of air sent to the bypass passage 5 among the air that has passed through the evaporator 3,
A heating amount adjusting means 6 for adjusting the ratio with the amount of air sent to the heater core 4 is provided. That is, according to the air amount ratio determined by the heating amount adjusting means 6, air mixing is performed at the downstream side portions of the heater core 4 and the bypass passage 5 so that the desired air conditioning outlet temperature is obtained.

At the most downstream side portion of the duct 1, there are provided openings 7, 8, 9 for blowing out the conditioned air whose temperature has been adjusted by the heating amount adjusting means 6 into the passenger compartment.
Specifically, the opening has a face opening 7 for blowing out conditioned air toward the upper half of the occupant, and a foot opening 8 for blowing out conditioned air toward the lower half of the occupant. And a defroster opening 9 for blowing air toward the inner surface of the glass of the vehicle.

The opening area of each of the openings 7, 8 and 9 is adjusted by the outlet switching device 10. Less than,
The outlet switching device 10 will be described with reference to FIGS. FIG. 2 shows a view on arrow A of FIG. FIG. 3 shows a schematic perspective view of the outlet switching device 10. FIG. 4 is a schematic view showing a winding state. The blowout port switching device 10 includes a winding drive shaft 1
1, a winding driven shaft 12, and a film member 200.

The winding drive shaft 11 is disposed on the left side of the face opening 7. The take-up drive shaft 11 has its axial direction directed to the upper side and the back side of the paper in FIG.
It is supported by and is freely rotatable. Take-up driven shaft 12
Is arranged on the right side of the foot opening 8. The take-up driven shaft 12 has its axial direction directed to the upper side and the rear side of the paper surface in FIG. 1, both ends are supported by the duct 1, and are rotatable.

The membranous member 200 is formed of a flexible film material, and its outer shape is a substantially rectangular shape. As shown in FIG. 1, the film member 200 includes a face opening 7, a defroster opening 9 and a foot opening 8.
It is arranged so that it may face. Both ends in the longitudinal direction of the film member 200 are fixed to the winding drive shaft 11 and the winding driven shaft 12, respectively.

The length of the film member 200 in the longitudinal direction is longer than the distance between the winding drive shaft 11 and the winding driven shaft 12, and the film member 200 is always a predetermined amount of the winding drive shaft. 11 or the take-up driven shaft 12 is wound around at least one of them. Then, the film member 200 is
The winding drive shaft 11 and the winding driven shaft 12 rotate together, and the opening 15 moves. Specifically, when the winding drive shaft 11 winds up the film member 200, the winding driven shaft 12 sends out the film member 200, and the opening 15 moves leftward in FIG. 1. On the other hand, when the take-up driven shaft 12 takes up the film member 200, the take-up drive shaft 11 sends out the film member 200,
The opening 15 moves to the right in FIG. In the present embodiment, the blowout port mode can be switched by using the film member 200 over almost the entire area (from one end side to the other end side).

In practice, between the winding drive shaft 11 and the winding driven shaft 12, a film-like structure is formed along the arrangement of the face opening 7, the foot opening 8 and the defroster opening 9. An intermediate shaft 13 is provided in order to arrange the member 100 in a dogleg shape, and this shaft 13 is interlocked with the winding drive shaft 11 and the winding driven shaft 12.

Hereinafter, for simplification of description, the description will be made by substituting the opening area of the face opening portion 7 with the film member 200. 2, 3 and 4 correspond to this, and FIG. 2 shows a state in which the film drive member 11 is maximally wound around the winding drive shaft 11. The membranous member 200 is shown in FIG.
Further, as shown in FIG. 2, an opening 15 for switching the outlet mode is formed, and the conditioned air is blown to the face opening 7 through the opening 15. And
Similar openings are formed in the film member 200 along the longitudinal direction so as to form a predetermined pattern.

That is, in FIG. 1, when the winding drive shaft 11 and the winding driven shaft 12 rotate in conjunction with each other, the film member 200 is moved.
The position of the opening portion 15 formed in is moved, and the desired blowing mode is selected. For example, in the face mode (blowing mode in which the conditioned air is sent only to the face opening 7), the opening 15 is arranged so as to overlap the face opening 7. On the other hand, the foot opening 8 and the defroster opening 9 are closed at a portion of the membranous member 200 where the opening 15 is not formed.

Here, in the blowout opening that is to be simply opened,
The sealability cannot be ensured only by arranging the openings 15 of the film member 200 so as to face each other and by arranging the portion of the film member 100 where the openings are not formed so as to face the opening for blowing to be closed. Therefore, the film member 200 is configured to be bent by the wind pressure, and the film member 200 swells upward in FIG. 1 due to the wind pressure and press-contacts with the opening edge of the face opening 7 to ensure the sealing property. .

A driving device 17 for moving the film member 200 is connected to the winding driving shaft 11 and the winding driven shaft 12 as described above. The driving device will be described below. The drive device 17 is connected to one end side (see FIGS. 2 and 3) of the winding drive shaft 11 and the winding driven shaft 12 in the axial direction, and includes the first and second pulleys 18 and 19, and the first and second pulleys 18 and 19. , A cable 2 connecting the second pulleys 18, 19
0 and driving means 21 (see FIG. 2) for driving the first pulley 18.

As shown in FIG. 3, the first pulley 18 has a reel shape, and a fitting portion 22 is integrally formed on one end side in the axial direction. The fitting portion 22 of the first pulley 18 and the winding drive shaft 11 is fitted into a fitting hole 23 formed at one end of the winding drive shaft 11. And
Since the shape of the fitting portion 22 is a rotation preventing shape with respect to the fitting hole 23, the first pulley 18 and the winding drive shaft 11 rotate integrally.

The second pulley 19 is also the first pulley 1
Although it has a reel shape similar to that of 8, a connection shaft (not shown) having a fitting portion 24 is connected to one end side in the axial direction via a tension spring 26. The fitting portion 24 of the coupling shaft and the take-up driven shaft 12 is fitted in a fitting hole 25 formed at one end of the take-up driven shaft 12. Since the shape of the fitting portion 24 is a rotation preventing shape with respect to the fitting hole 25, the second pulley 19
And the take-up driven shaft 12 rotate together.

The second pulley 19 differs from the first pulley 18 in that a tension spring, which is a spring member, is provided between the second pulley 19 and the take-up driven shaft 12 as shown in FIG. 26 is interposed. The tension spring 26 is for applying tension to the film member 200, and has one end side fixed to the second pulley 19 and the other end side fixed to the winding driven shaft 12. As a result, the tension spring 26 causes the film-shaped member 20 to be wound in any winding state of the film-shaped member 200.
0 will be given tension.

Both ends of the cable 20 are first and
The film member 200 is fixed to the second pulleys 18 and 19.
Corresponding to the moving range of the first and second pulleys 18, 19
A certain amount is wound around. And this cable 2
0 allows the second pulley 19 to move to the first pulley 18
It is designed to rotate almost in synchronization with the rotation of. Even when the cable 20 is maximally wound around the first pulley 18 or the second pulley 19,
The reel-shaped winding surfaces of the first pulley 18 and the second pulley 19 are formed so that the winding diameters of the pulley 18 and the second pulley 19 are equal.

Here, as shown in FIG. 4, the cable 20
The intermediate part of is fixed to one end of the plate 27 so that it can be wound up. The other end of the plate 27 is the duct 1
Is movably fitted into a substantially arcuate guide groove 28 provided on the side wall of the. The plate 27 moves along the guide groove 28 so as to reduce the tension of the cable 20 when the tension of the cable 20 increases, so that the film-shaped member 200 is maximally attached to the winding drive shaft 11 and the winding driven shaft 12. It is arranged so as to be positioned at both ends of the guide groove 28 in the state of being wound up.

The driving means 21 is, for example, the step motor 2
It is composed of 1. The step motor 21 is connected to an end surface of the first pulley 18 opposite to the fitting portion 23. Then, when the step motor 21 is driven by a predetermined step, the first pulley 18 rotates, and accordingly, the second pulley 19 rotates via the cable 20 in synchronization with the rotation of the first pulley 18. Will be done.

The heating amount adjusting means 6 (see FIG. 1) is also
Although it has substantially the same configuration as the blowout port switching device 10 described above and a detailed description thereof will be omitted, in brief description, the amount of air sent to the heater core 4 depends on the opening area of the opening formed in the film-shaped member 300. By adjusting the amount of air sent to the bypass passage 5 and the amount of air sent to the bypass passage 5, a desired conditioned air temperature can be obtained.

Next, the operation of the outlet switching device 10 will be described with reference to FIGS. First, the winding drive shaft 11
The film member 200 is in the state of being wound up to the minimum, and the film member 200 is taken up in the state of being maximally wound around the take-up driven shaft 12, and the plate 27 at this time is shown in FIG. As shown in (), it is located at the left end portion of the guide groove 28, and the winding drive shaft 11 starts the winding operation from this state. The apparent shaft diameter of the winding drive shaft 11 including the film member 200 in this state is d, and the apparent shaft diameter of the winding driven shaft 12 including the film member 200 is d + t _MAX .

Here, when the stepping motor 21 is driven to rotate the winding drive shaft 11 in the forward direction (the direction of the solid line arrow in the drawing) (hereinafter referred to as the forward rotation) to wind up the film member 200,
Along with this winding operation, the first pulley 18 also rotates forward and the cable 20 wound around the first pulley 18 (in the case of the state of FIG. 4A, the cable 20 moves to the first pulley 18). Sent in).
Then, along with the winding operation of the winding drive shaft 11, the winding driven shaft 1
2 rotates forward, the film-shaped member 200 is sent out from the winding driven shaft 12 to the winding drive shaft 11, and the second pulley 19 also rotates forward and the cable 20 sent out from the first pulley 18 is rotated. To wind up.

At this time, when the winding drive shaft 11 makes one rotation, the winding drive shaft 11 winds the film member 200 of about 2πd. Along with this, the second pulley 19 rotates in synchronization with the first pulley 18, so that the second pulley 19 also tries to make one rotation. On the other hand, about 2πd of the winding drive shaft 11
Of the film-shaped member 200 of FIG.
The film-shaped member 200 of 2 to about 2πd is sent out to the winding drive shaft 11, but the apparent shaft diameter of the winding driven shaft 12 is t _MAX larger than the apparent shaft diameter of the winding drive shaft 11. Since it is large, the take-up driven shaft 12 rotates a little less than one rotation. That is, the second pulley 19 makes one rotation, and the take-up driven shaft 12 connected to the second pulley 19 makes one turn.
If the rotation is slightly weak, the rotation difference between the rotation of the second pulley 19 and the rotation of the take-up driven shaft 12 will occur.

However, the cable 20 has the guide groove 2
Since it is fixed to the plate 27 that is movably fitted along the plate 8, as the cable 20 moves, the plate 2
This rotation difference is absorbed by the movement of 7 to the lower right to increase the apparent length of the cable 20. That is, the second pulley 19 also rotates a little less than one rotation.
Thus, the plate 27 acts to increase the apparent length of the cable 20, so that the tension (tension) of the film-shaped member 200 by the tension spring 26 is always kept constant, and the step motor 21 is operated. Even when the winding drive shaft 11 is rotated in the forward direction to wind up the film-shaped member 200, the load on the step motor 21 becomes constant.

From this state, when the winding drive shaft 11 is further rotationally driven to perform the winding operation of the film member 200, as shown in FIG.
As shown in (b), the apparent shaft diameter of the winding drive shaft 11 including the film member 200 is d + t ₁ , and the apparent shaft diameter of the winding driven shaft 12 including the film member 200 is d + t ₂ ( t ₂ > t
₁ ), and as t ₁ gradually increases and t ₂ gradually decreases, the plate 27 moves further to the lower right and acts to further increase the apparent length of the cable 20. 26 is a film member 2
The operation force of the film member 200 is always constant without bending 00.

Then, as the apparent shaft diameter of the winding drive shaft 11 and the apparent shaft diameter of the winding driven shaft 12 become equal, the apparent shaft diameter difference (t ₂ −t ₁ ) gradually decreases. Therefore, the rotation difference between the rotation of the second pulley 19 and the rotation of the winding driven shaft 12 becomes gradually smaller, and the film-shaped member 200
Apparent shaft diameter of the winding drive shaft 11 including the film and the film member 20
The apparent diameters of the winding driven shafts 12 including 0 are equal (t
_{When 1} = t ₂ ), the plate 27 moves further downward and the apparent length of the cable 20 becomes maximum.

From this state, when the winding drive shaft 11 is further rotationally driven to perform the winding operation of the film-shaped member 200, the apparent shaft diameter of the winding drive shaft 11 including the film-shaped member 200 is now the film. The diameter is larger than the apparent shaft diameter of the winding driven shaft 12 including the member 200 (t ₁ > t ₂ ). At this time, when the winding drive shaft 11 makes one rotation, the winding drive shaft 11 moves about 2π (d +
The film member 200 at t ₁ ) is wound up. Along with this, the second
The pulley 19 rotates in synchronization with the first pulley 18, so that the second pulley 19 also tries to rotate once.

On the other hand, about 2π (d +
t ₁₎ in accordance with the winding operation of the film member 200, but the film-like member 200 about 2π from the winding driven shaft 12 (d + t ₁₎ is to be delivered to the take up drive shaft 11, the winding driven Since the shaft diameter of the shaft 12 is smaller than the shaft diameter of the winding drive shaft 11 by (t ₁ -t ₂ ), the winding driven shaft 12 rotates by a little more than one rotation. That is, the second pulley 19 makes one rotation,
When the take-up driven shaft 12 connected to the second pulley 19 rotates by a little more than one rotation, a rotation difference occurs between the rotation of the second pulley 19 and the take-up driven shaft 12.

However, as described above, since the cable 20 is windably wound around the plate 27 that is movably fitted along the guide groove 28, the second pulley 19 rotates and winds. When a difference in rotation occurs between the driven shaft 12 and the driven shaft 12, the tension of the cable 20 increases, so that the cable 20 acts to pull the plate 27 upward as the tension increases. As a result, this time, the plate 27 moves to the upper right and the apparent length of the cable 20 is shortened, so that this rotation difference is absorbed. That is, the second pulley 19 also rotates by a little over one rotation. Thus, the plate 27 is connected to the cable 2
Since the apparent length of 0 is shortened, the tension (tension) of the film member 200 by the tension spring 26 is always constant, and the step motor 21 rotates the winding drive shaft 11. Membrane member 2 driven
Even when 00 is wound, the tension spring 26 does not twist in the negative direction, and the load on the step motor 21 is always constant.

Then, when the stepping motor 21 further drives the winding drive shaft 11 in the forward direction to wind the film member 200 around the winding drive shaft 11 as shown in FIG. Acts to further reduce the apparent length of the cable 20, and the plate 27 moves so as to be positioned at the right end portion of the guide groove 28, but the tension of the membrane member 200 by the tension spring 26 is always constant. Therefore, even if the stepping motor 21 rotationally drives the winding drive shaft 11 to wind up the film-shaped member 200,
The tension spring 26 does not twist in the negative direction,
The load on the step motor 21 is always constant.

On the other hand, the winding drive shaft 1 for the film member 200
1 to the winding driven shaft 12 from the maximum winding state of the film member 2
When the driven shaft 12 winds up the film member 200 from the state of FIG. 4C to the state of FIG. When the first pulley 18 is rotated in the reverse direction by rotating the winding drive shaft 11 in the reverse direction (hereinafter referred to as reverse rotation) by rotating the first pulley 18 in the reverse direction (the direction indicated by the dotted arrow in the figure). The first pulley 18 winds the cable 20 that is maximally wound around the second pulley 19. Then, the film member 200 maximally wound on the winding drive shaft 11 is sent out to the winding driven shaft 12, and the winding driven shaft 12 winds the film member 200.

With the winding operation of the cable 20 of the first pulley 18, the second pulley 19 is also moved to the first pulley 1
It rotates in reverse in synchronization with 8. At this time, when the take-up driven shaft 12 makes one revolution, the take-up drive shaft 11 has the film-shaped member 2 of about 2πd.
00, and the take-up driven shaft 1 is driven by the take-up operation of the film-shaped member 200 of about 2πd from the take-up drive shaft 11.
2 will wind up the film member 200 of about 2πd,
Since the apparent shaft diameter of the winding drive shaft 11 is larger than the apparent shaft diameter of the winding driven shaft 12 by t _MAX , the winding drive shaft 1
1 will rotate a little less than one rotation. That is, when the first pulley 18 rotates a little less than one rotation, and the second pulley 19 connected to the first pulley 18 rotates less than one rotation, the rotation of the second pulley 19 and the take-up driven shaft. 1
There will be a rotation difference between the two rotations.

However, as described above, the cable 20 is rotatably fixed to the plate 27 that is movably fitted along the guide groove 28.
When the rotation difference between the rotation of the pulley 19 and the rotation of the take-up driven shaft 12 occurs, the tension of the cable 20 increases.
It acts to pull 7 downward. As a result, the plate 27 moves to the lower left to increase the apparent length of the cable 20, and this difference in rotation is absorbed. That is, the second pulley also rotates only once.
In this way, the plate 27 acts to increase the apparent length of the cable 20, so that the tension of the film-shaped member 200 by the tension spring 26 is always kept constant, and the step motor 21 is wound. Even if the drive shaft 11 is driven to rotate in the reverse direction and the cable 20 is wound up, the load on the step motor 21 becomes constant.

From this state, when the winding drive shaft 11 is further driven in the reverse direction to wind the cable 20, the operation shown in FIG.
As shown in (b), the apparent shaft diameter of the winding drive shaft 11 including the film member 200 is d + t ₁ , and the apparent shaft diameter of the winding driven shaft 12 including the film member 200 is d + t ₂ ( t ₁ > t
₂ ), and as t ₂ gradually increases and t ₁ gradually decreases, the plate 27 moves further to the lower left and acts to further increase the apparent length of the cable 20, so that the tension spring 26 is a film member 2
The operation force of the film member 200 is always constant without bending 00.

Since the apparent shaft diameter difference (t ₁ -t ₂ ) gradually decreases as the apparent drive shaft diameter of the take-up drive shaft 11 and the apparent drive shaft diameter of the take-up driven shaft 12 become equal, Second
The rotation difference between the rotation of the pulley 19 and the rotation of the winding driven shaft 12 gradually decreases, and the apparent shaft diameter of the winding drive shaft 11 including the film member 200 and the winding including the film member 200. When the apparent shaft diameters of the driven shaft 12 become equal (t ₁ = t ₂ ), the plate 27 moves further downward and the cable 20 moves.
Has the maximum length.

From this state, when the winding drive shaft 11 is further driven to rotate and the cable 20 is wound up, the apparent shaft diameter of the winding drive shaft 11 including the film-shaped member 200 is d + t ₁ , The apparent shaft diameter of the winding driven shaft 12 including the film member 200 is d + t ₂ (t ₂ > t ₁ ). At this time,
When the winding drive shaft 11 makes one revolution, the winding driven shaft 12 moves about 2 times.
The film member 200 of π (d + t ₁ ) is wound up. Along with this, the second pulley 19 rotates in synchronization with the first pulley 18, so that the second pulley 19 also tries to make one rotation.

On the other hand, about 2π (d +
t ₁₎ in accordance with the winding operation of the film member 200, but the film-like member 200 about 2π from the winding drive shaft 11 (d + t ₁₎ is to be fed to the winding driven shaft 12, the winding driven Since the apparent shaft diameter of the shaft 12 is larger than the apparent shaft diameter of the winding drive shaft 11 by t ₂ −t ₁ , the winding driven shaft 12 rotates a little less than one rotation. That is, when the second pulley 19 makes one rotation and the take-up driven shaft 12 connected to the second pulley 19 makes a little less than one revolution, the rotation of the second pulley 19 and the take-up driven shaft 12 rotate. There will be a rotation difference between and.

However, as described above, the cable 20 is fixed to the plate 27 that is movably fitted along the guide groove 28 so that it can be wound up.
If there is a rotation difference between the rotation of the pulley 19 and the rotation of the take-up driven shaft 12, the tension of the cable 20 increases.
Acts to pull upward. As a result, the plate 27 moves to the upper left and acts so as to shorten the apparent length of the cable 20, so that the tension of the film member 200 by the tension spring 26 is always constant. However, even if the step motor 21 drives the winding drive shaft 11 in the reverse direction to wind the cable 20, the tension spring 26 is not twisted in the forward direction, and the load on the step motor 21 is always constant.

Then, when the stepping motor 21 drives the winding drive shaft 11 in the reverse rotation to wind the cable 20 to the winding drive shaft 11 as shown in FIG.
7 acts so as to further shorten the apparent length of the cable 20, and the plate 27 moves so as to be positioned at the left end portion of the guide groove 28.
Since the tension of the film-shaped member 200 due to the action acts so that it is always constant, the load of the step motor 21 is always constant.

As described above, in the embodiment of the present invention, the first pulley 18 that rotates with the rotation of the winding drive shaft 11 by the drive means 21 and the rotation of the first pulley 18 are substantially synchronized. The cable 20 is provided between the second pulley 19 and the second pulley 19 that rotate to rotate the take-up driven shaft 12 via the tension spring 26. The intermediate portion of the cable 20 between the first pulley 18 and the second pulley 19 is fixed to one end of the plate 27, which is not fitted into the guide groove 28, so that the intermediate portion of the cable 20 can be wound up.
The plate 27 is arranged so as to move along the guide groove 28 so as to reduce the tension of the cable 20 as the tension of the cable 20 increases.

As a result, during the winding operation of the winding drive shaft 11 or the winding driven shaft 12, the apparent shaft diameter of the winding drive shaft 11 including the film member 200 and the winding driven including the film member 200. Even if the apparent shaft diameter of the shaft 12 is different, when the tension of the cable 20 is increased, the plate 27 moves along the guide groove 28 so as to reduce the tension, so that the rotation of the second pulley 19 is prevented. There is no difference in rotation from the rotation of the take-up driven shaft 12.

Therefore, the guide groove 28 disposed on one side surface of the duct 1 and the plate 27 fitted movably along the guide groove 28 are provided, and one end portion of the plate 27 which is not fitted into the guide groove 28 is provided. The tension of the film-shaped member 200 can be kept constant by a simple structure in which the intermediate portion of the cable 20 is fixed so that the film-shaped member 200 can be wound up. Since the operating force is always constant, it becomes possible to use a driving means having an appropriate operating force, and this type of vehicle air conditioner can be manufactured in a small size and at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a vehicle air conditioner of the present invention.

FIG. 2 is a view on arrow A of FIG.

FIG. 3 is a perspective view showing an outline of an outlet switching device of the present invention.

FIG. 4 is a diagram showing a winding state of the drive device of the air outlet switching device of the present invention.

FIG. 5 is a view showing a wound state of an on-membrane member of a conventional air outlet switching device.

FIG. 6 is a diagram showing the relationship between the winding state and the operating force in FIG.

[Explanation of symbols]

1 ... Duct, 2 ... Blower, 7-9 ... Blowing opening, 11
... Winding drive shaft, 12 ... Winding driven shaft, 18 ... First pulley, 19 ... Second pulley, 20 ... Cable (rotation transmitting means), 21 ... Step motor (driving means), 24 ... Tension spring ( Tension imparting means), 27 ... Plate (interaxial distance varying means), 28 ... Guide groove (interaxial distance varying means), 200, 300 ... Membrane member

Claims (4)

[Claims] 1. A blowout opening formed in a duct forming an air passage, and a film-like member arranged in the duct so as to face the blowout opening, wherein the film-like member is provided. A vehicle air conditioner configured to move in a duct to adjust the opening area of the blowout opening and to be slidable with the opening edge of the blowout opening, the support being rotatably supported by the duct. A winding drive shaft that fixes one end of the film member and winds or sends out the film member; drive means that drives the winding drive shaft in the forward and reverse directions; and a winding drive shaft. And a first pulley, which is rotatably supported by the duct, fixes the other end of the film-shaped member, and winds the film-shaped member in accordance with the feeding of the film-shaped member of the winding drive shaft. Together with the film portion of the winding drive shaft And a second pulley provided on the winding driven shaft, which interposes between the winding driven shaft and the second pulley. A tension applying means for applying a tension to the film member at all times, and a second pulley so as to be substantially synchronized with the rotation of the first pulley rotated with the rotation of the winding drive shaft by the driving means. A rotation transmission means for rotating and rotating the winding driven shaft via the tension imparting means, and an inter-axis for varying a distance between the first pulley and the second pulley of the rotation transmission means. An air conditioner for a vehicle, comprising: a distance varying unit. 2. The axial distance varying means comprises a guide groove arranged on one side surface of the duct and a plate movably fitted along the guide groove, and the guide groove of the plate. The intermediate portion of the rotation transmitting means is fixed to one end not fitted in the winding portion so that the plate can be wound along the guide groove so as to decrease the tension of the rotation transmitting means when the tension of the rotation transmitting means increases. The vehicle air conditioner according to claim 1, wherein the air conditioner is installed so as to move. 3. The tension applying means is composed of a spring member, and one end side of the spring member is fixed to the winding driven shaft,
The vehicle air conditioner according to claim 1 or 2, wherein the other end is fixed to the first pulley. 4. The vehicle air conditioner according to claim 1, wherein the rotation transmitting means is a cable member.