JP2014159251A - Driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device which enables non-contact electric power feeding and achieves space saving.SOLUTION: Electric power is transmitted from a power transmission coil 23 to a power reception coil 22 in a non-contact manner and an electric current flows through the power reception coil 22. Since a shape memory spring 21 is electrically connected with the power reception coil 22, and the electric current flows through the shape memory spring 21. The shape memory spring 21 generates heat when the electric current flows therethrough, and a coil shaped portion contracts due to a shape memory function. Thus, the structure applies a moving force caused by the contraction to a door 11 that is a movable body.

Description

  The present invention relates to a driving device that uses a shape memory spring to displace a moving body such as a door by applying a moving force.

  A conventional vehicle air conditioner includes a plurality of doors that open and close an air flow path. The plurality of doors are driven by a plurality of drive motors, respectively. In one example, a drive circuit is provided for each drive motor. In another example, in order to reduce the number of parts, a plurality of drive motors and their drive circuits are accommodated in one housing and modularized.

  Further, in the drive device described in Patent Document 1, first and second door drive motors housed in a housing and modularized, and a third drive for door drive disposed at a position away from the housing. A motor. Then, the drive circuits of the first, second, and third drive motors are formed in one electronic circuit board, and this is housed in a modular housing. As a result, each electronic circuit board is modularized, including not only the drive motors located close to each other but also the drive motors located apart from each other.

JP 2011-201447 A

  In the aforementioned Patent Document 1, the door is driven by a drive motor. The essential elements constituting this drive motor have been determined, and it is difficult to save space. Further, when the number of drive motors increases, there is a problem that it becomes difficult to route wiring from the power supply source.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide a drive device that can supply power in a non-contact manner and can save space.

  The present invention employs the following technical means in order to achieve the aforementioned object.

  The present invention is a drive device (10) for applying a moving force to a moving body (11) to displace the moving body, one end of which is provided on the moving body and the other end at a predetermined fixed position (30, 31). The coiled shape memory member (21, 21L) to be fixed, the power receiving coil (22) provided on the moving body and electrically or magnetically connected to the shape memory member, and the power receiving coil to transmit power without contact. And a power transmission coil (23) to perform.

  According to the present invention, power is transmitted from the power transmission coil to the power reception coil in a non-contact manner, and current flows through the power reception coil. Since the shape memory member is electrically or magnetically connected to the power receiving coil, a current also flows through the shape memory member. The shape memory member generates heat when a current flows, and the coiled portion contracts due to the function of shape memory. Therefore, the moving force by contraction can be given to the moving body. As a result, the moving body can be displaced. Since such a drive device of the present invention uses a power transmission coil and a power reception coil, the movable body can be driven by contracting the shape memory member in a non-contact manner. Therefore, the degree of freedom of wiring can be improved. In addition, the coil-shaped shape memory member and the power receiving coil and the power transmitting coil can be arranged separately. Accordingly, the degree of freedom in arrangement can be improved, and the arrangement space of the drive device can be saved.

  In addition, the code | symbol in the bracket | parenthesis of each above-mentioned means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a perspective view which shows the drive device 10 of 1st Embodiment. 4 is a graph showing an example of a movable angle X of a door 11. It is a perspective view which shows 10 A of drive devices of 2nd Embodiment. It is a perspective view which shows the drive device 10B of 3rd Embodiment. It is a perspective view which shows a part of drive device 10C of 4th Embodiment. It is a perspective view which shows a part of drive device 10D of 5th Embodiment. It is a perspective view which shows a part of drive device 10E of 6th Embodiment. It is a perspective view which shows a part of drive device 10F of 7th Embodiment. It is a perspective view which shows a part of drive device 10G of 8th Embodiment. It is a perspective view which shows the drive device 10H of 9th Embodiment. It is a perspective view which shows the drive device 10I of 10th Embodiment. It is a perspective view which shows the drive device 10J of 11th Embodiment. It is a perspective view which shows the drive device 10K of 12th Embodiment. It is a perspective view which shows the drive device 10L of 13th Embodiment.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described with reference to the drawings. In some embodiments, portions corresponding to the matters described in the preceding embodiments may be given the same reference numerals, or one letter may be added to the preceding reference numerals, and overlapping descriptions may be omitted. In addition, when a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those of the embodiment described in advance. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder the combination.

(First embodiment)
1st Embodiment of this invention is described using FIG. 1 and FIG. The drive device 10 angularly displaces the door 11 with one end of the plate-like door 11 as a fulcrum 12. One end of the door 11 is provided on the fixed base 13 as a fulcrum 12 so as to be angularly displaceable. The driving device 10 is an actuator for the plate-like door 11 and includes a shape memory spring 21, a power receiving coil 22, a power transmitting coil 23, a power transmitting circuit 24, and a fixing hook 30.

  The shape memory spring 21 is a coil-shaped shape memory member. The shape memory spring 21 is made of a shape memory alloy that returns to its original shape before deformation when heated even if deformed. The shape memory spring 21 is configured to contract when heated. Therefore, the length of the shape memory spring 21 is different before and after heating, and the shape memory spring 21 before heating is longer than the shape memory spring 21 after heating.

  One end of the shape memory spring 21 is provided on the door 11 and the other end of the shape memory spring 21 is fixed at a predetermined fixing position. The predetermined fixing position is the fixing hook 30. The fixing hook 30 is fixed in the same manner as the fixing base 13. Specifically, one end of the shape memory spring 21 is electrically and mechanically connected to one end of the power receiving coil 22. The other end of the shape memory spring 21 is electrically and mechanically connected to the other end of the power receiving coil 22. Therefore, the shape memory spring 21 is electrically connected to the power receiving coil 22 to form a closed circuit. A part of this closed circuit is hooked on the fixing hook 30. The portion of the closed circuit that is hooked on the fixing hook 30 has rigidity. The shape memory spring 21 has, for example, a spring diameter of 0.5 mm and a spring length of 20 mm. The dimensions of the door 11 are, for example, a width of 30 mm, a length of 50 mm, and a thickness of 5 mm.

  Next, an electrical configuration of the power transmission coil 23 and the like will be described. The power receiving coil 22 and the power transmitting coil 23 are shown as multiple quadrangular shapes in each figure for easy understanding, but are actually configured by winding one conductive wire.

  The power transmission circuit 24 is connected to an external power source (not shown) and the power transmission coil 23. The external power source is, for example, a battery. The power transmission circuit 24 operates when power is transmitted from the power transmission coil 23 to the power reception coil 22. The power transmission circuit 24 converts the power supplied from the external power source into high-frequency power and supplies it to the power transmission coil 23.

  The power transmission coil 23 transmits power to the power reception coil 22 in a non-contact manner by an electromagnetic induction method. The electromagnetic induction method is a method of sending electric power by using an induced magnetic flux generated between the power transmission side and the power reception side. The power transmission coil 23 is configured to generate an electromagnetic field by a predetermined energization. The power transmission coil 23 is connected to the power transmission circuit 24 and transmits high-frequency power supplied from the power transmission circuit 24 to the power reception coil 22 in a non-contact manner by electromagnetic induction. The size of the power transmission coil 23 is, for example, 50 mm long and 30 mm wide. Further, the power transmission coil 23 is disposed at a position separated from the door 11 by a length L on the lower side, in the present embodiment, at a position separated by 7 cm (= L).

  The power receiving coil 22 is mounted on the surface of one side in the thickness direction of the door 11 (upper side in FIG. 1). The power receiving coil 22 receives the power from the power transmitting coil 23 in a non-contact manner. The power receiving coil 22 generates an electromagnetic field in the power receiving coil 22 due to the influence of the electromagnetic field generated by the power transmitting coil 23, and a current flows through the power receiving coil 22. A resonant capacitor 25 that resonates with the inductance of the power receiving coil 22 is connected in series in the closed circuit formed by the power receiving coil 22 and the shape memory spring 21.

  Next, the operation of the driving device 10 will be described. When the driving device 10 is driven, for example, about 10 MHz and 0.4 A (19 V) are output from the power transmission circuit 24. When the output of the power transmission circuit 24 is turned on, a current (about 200 mA, 3 V) is induced in the power receiving coil 22. Since the power receiving coil 22 is connected to the shape memory spring 21, the current generated in the power receiving coil 22 also flows to the shape memory spring 21. The shape memory spring 21 is heated by this current. When the shape memory spring 21 is heated, it contracts. When the shape memory spring 21 contracts, a moving force acts on the door 11 in a direction in which the distance between the fixing hook 30 and the door 11 decreases. As a result, the door 11 is angularly displaced toward the fixing hook 30 with one end as a fulcrum 12.

  In the case of this embodiment, when the transmission output is off, the movable distance is 0 cm, but when the transmission output is on, the movable distance is about 4 cm (spring contraction limit). As shown in FIG. 2, the movable angle X is 0 degrees when the power transmission circuit 24 is off, and the movable angle X is 30 degrees when the power transmission circuit 24 is on. Therefore, the contraction of the shape memory spring 21 gives a moving force to the door 11 and can be angularly displaced.

  As described above, in this embodiment, power is transmitted from the power transmission coil 23 to the power reception coil 22 in a non-contact manner, and a current flows through the power reception coil 22. Since the shape memory spring 21 is electrically connected to the power receiving coil 22, a current also flows through the shape memory spring 21. The shape memory spring 21 generates heat when an electric current flows, and the coiled portion contracts due to the function of shape memory. Therefore, the moving force by contraction can be given to the door 11 which is a moving body. As a result, the door 11 can be displaced. Since the drive device 10 of this embodiment uses the power transmission coil 23 and the power reception coil 22, the door 11 can be driven by contracting the shape memory spring 21 in a non-contact manner. Therefore, the degree of freedom of wiring can be improved. Therefore, the degree of freedom of arrangement can be improved and the arrangement space of the driving device 10 can be saved. Further, since the drive device 10 has a simple configuration, it can be easily reduced in size and weight.

  In addition, the present embodiment further includes a resonance capacitor 25 that is electrically connected to the power receiving coil 22 and resonates with the inductance of the power receiving coil 22. The resonance capacitor 25 converts the phase of the power voltage and the current so as to coincide with each other, and can efficiently transmit power from the power transmission coil 23 to the power reception coil 22. Accordingly, the shape memory spring 21 can be operated even with a small amount of power transmission.

  Furthermore, in this embodiment, the shape memory spring 21 is electrically connected to the power receiving coil 22 to form a closed circuit. Since the shape memory spring 21 forms a closed circuit, the current flowing through the power receiving coil 22 flows through the shape memory spring 21 as it is. As a result, the current flowing through the power receiving coil 22 can be efficiently passed through the shape memory spring 21.

  In other words, in the drive device 10 (actuator device) of the plate-like door 11 whose angle is variable with a part as a fulcrum 12, one end is fixed to the door 11 and the other end is external. The shape memory spring 21 is fixed to the fixing portion. And the fulcrum 12 is provided in the door 11 so that the angle of the door 11 may change according to the expansion / contraction of the shape memory spring 21, and the receiving coil 22 of radio | wireless electric power feeding is formed on the door 11 board. The end of the power receiving coil 22 and the end of the shape memory spring 21 are electrically connected to form a closed circuit. Moreover, it has the power transmission coil 23 of the radio | wireless electric power feeding arrange | positioned at an external fixing part.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. Compared with the first embodiment, the drive device 10 </ b> A of this embodiment is characterized in that it does not have the resonant capacitor 25 and the fixing hook 30 but has a fixing wall 31 instead of the fixing hook 30.

  As shown in FIG. 3, the other end of the shape memory spring 21 is a fixed wall 31 as a predetermined fixed position. The fixed wall 31 is fixed in the same manner as the fixed base 13. A part of the closed circuit is fixed to a fixed wall 31 as shown in FIG. In this way, if a fixing member such as the fixing wall 31 is provided in a portion facing the door 11 without separately providing the fixing hook 30, a part of the closed circuit can be fixed. As a result, the same operations and effects as those of the first embodiment described above can be achieved.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The drive device 10B of the present embodiment is characterized in that the drive device 10B of the second embodiment is used for a vehicle air conditioner.

  The door 11 that is driven by the driving device 10B is a door 11 (blower switching door) that is angularly displaced to open and close an air passage. The driving device 10B drives the door 11 that opens and closes the upper air passage 40 shown in FIG. The fixed wall 31 is a part of the inner wall of the air conditioning case 41 that forms the air passage 40. In other words, the shape memory spring 21 has one end fixed to the door 11 and the other end fixed to the air conditioning case 41 that forms the air passage 40. The power transmission coil 23 is provided outside the air conditioning case 41.

  Thus, the angular displacement of the door 11 can be controlled wirelessly by turning on and off the power transmission circuit 24 provided outside the air conditioning case 41. In the case of the prior art that uses a drive motor as the drive device 10 </ b> B of the door 11, the drive motor itself compresses the air passage 40. In this embodiment, since the member which obstruct | occludes the air path 40 can be suppressed to the minimum, it can suppress that the drive device 10B becomes ventilation resistance. In the prior art, since the wiring for the drive motor is routed in the air conditioning case 41 having a complicated shape, it takes time during manufacturing. However, in the present embodiment, since there is only the independent power receiving coil 22 in the air conditioning case 41, the arrangement thereof is easy, so that the manufacture becomes easy.

  Further, since the control is performed wirelessly, the air conditioning case 41 does not require a hole for wiring from the outside to the inside. Therefore, in this embodiment, since it is not necessary to provide the hole for wiring in the air-conditioning case 41, it can prevent that air leaks outside through a hole like the prior art.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. The drive device 10C of the present embodiment is characterized in that a weight 32 is provided on the door 11 constituting the drive device 10C of the second embodiment.

  As shown in FIG. 5, the fixed wall 31 is on the upper side, and when the shape memory spring 21 contracts, the door 11 is angularly displaced upward. A weight 32 is provided on the door 11. When the power transmission circuit 24 is turned off, the shape memory spring 21 remains heated and does not extend immediately. Therefore, by providing the weight 32, the force in the direction of gravity is acting on the door 11, so that the door 11 can be returned to the initial position earlier.

  In this embodiment, the weight 32 is provided separately, but the material and size may be selected so that the mass of the door 11 itself is increased. When the mass of the door 11 is determined in consideration of the mass of the door 11 and the contraction force of the shape memory spring 21, the same operation and effect as when the weight 32 is provided can be achieved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. Similar to the fourth embodiment, the drive device 10D of the present embodiment is characterized in that a return spring 33 is provided instead of the weight 32.

  As shown in FIG. 6, the door 11 is provided with a return spring 33. The return spring 33 has one end fixed to the door 11 and the other end fixed to the lower fixed wall 31. The contraction force of the return spring 33 is smaller than the contraction force of the shape memory spring 21. Therefore, when the shape memory spring 21 contracts, the door 11 is angularly displaced upward. When the power transmission circuit 24 is turned off, the shape memory spring 21 remains heated and does not extend immediately. Therefore, by providing the return spring 33, the contraction force of the return spring 33 always acts on the door 11, so that the door 11 can be returned to the initial position earlier.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described with reference to FIG. The drive device 10E of the present embodiment is characterized in that the fixed position of the shape memory spring 21 is different.

  As shown in FIG. 7, one end of the shape memory spring 21 is fixed to the door 11, and the other end is provided on a fixed wall 31 that supports the fulcrum 12 of the door 11. Even in such a configuration, the door 11 can be angularly displaced by the shape memory spring 21 contracting. Therefore, the fixed wall 31 does not have to be located away from the fulcrum 12 of the door 11. The position of the fixed wall 31 can be appropriately selected according to the width of the angular displacement of the door 11 and the presence or absence of the surrounding fixed wall 31.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with reference to FIG. The drive device 10F of this embodiment is characterized in that the configuration of the shape memory spring 21 is different.

  As shown in FIG. 8, the shape memory spring 21F is constituted by a torsion spring. The shape memory spring 21 </ b> F is provided inside the fulcrum 12 of the door 11. One end of the shape memory spring 21 </ b> F is fixed to one end of the door 11, and the other end is fixed to a fixed wall 31 that supports the fulcrum 12. One end of the shape memory spring 21 </ b> F is connected to the power receiving coil 22. Therefore, in this embodiment, the receiving coil 22 and the shape memory spring 21F do not constitute a closed circuit. Even in such a configuration, when a current flows through the power receiving coil 22, the power receiving coil 22 is heated, so that heat is transmitted to the shape memory spring 21F. When the torsion spring-shaped shape memory spring 21F contracts, the diameter of the helical spring is reduced, and a moving force is generated in a direction in which the angle formed by both ends is reduced. Therefore, the door 11 can be angularly displaced by contracting the torsion spring-shaped shape memory spring 21F. In the present embodiment, the shape memory spring 21 </ b> F is provided inside the fulcrum 12 of the door 11. Therefore, the drive device 10F can be further downsized.

(Eighth embodiment)
Next, an eighth embodiment of the present invention will be described with reference to FIG. The drive device 10G of the present embodiment is characterized in that the configuration of the shape memory spring 21G is different.

  As shown in FIG. 9, the shape memory spring 21G is formed of a spring. The shape memory spring 21 </ b> G is provided inside the fulcrum 12 of the door 11. One end of the shape memory spring 21G is fixed to one end of the door 11, and the other end is fixed to the inside of the fulcrum 12. One end of the shape memory spring 21 </ b> G is connected to the power receiving coil 22. Therefore, in this embodiment, the receiving coil 22 and the shape memory spring 21G do not constitute a closed circuit. Even in such a configuration, when a current flows through the power receiving coil 22, the power receiving coil 22 is heated, so that the heat is transmitted to the shape memory spring 21G. When the spring-shaped shape memory spring 21G contracts, the spring spring has a reduced diameter, and a moving force is generated in a direction in which one end is angularly displaced inward. Therefore, the door 11 can be angularly displaced by contracting the spring-shaped shape memory spring 21G. In the present embodiment, the shape memory spring 21 </ b> G is provided inside the fulcrum 12 of the door 11. Therefore, the driving device 10G can be further downsized.

(Ninth embodiment)
Next, a ninth embodiment of the present invention will be described with reference to FIG. The drive device 10H of the present embodiment is characterized in that two shape memory springs 211 and 212 are provided.

  As shown in FIG. 10, the door 11 is provided with two shape memory springs 211 and 212. One end of the first shape memory spring 211 provided above is fixed to the door 11 and the other end is fixed to the upper fixing wall 31. The second shape memory spring 212 provided below has one end fixed to the door 11 and the other end fixed to the lower fixed wall 31.

  The power transmission circuit 24 is configured to be able to transmit by switching between a first frequency and a second frequency different from the first frequency. The first shape memory spring 211 is connected in series with a first resonance capacitor 251 that resonates with the first frequency. The second shape memory spring 212 is connected in series with a second resonant capacitor 252 that resonates with the second frequency. Accordingly, when the power transmission circuit 24 transmits power at the first frequency, a large amount of current flows toward the first shape memory spring 211 by resonating with the closed circuit including the first shape memory spring 211. Similarly, when the power transmission circuit 24 transmits power at the second frequency, a large amount of current flows toward the second shape memory spring 212 by resonating with the closed circuit including the second shape memory spring 212. Therefore, the shape memory springs 211 and 212 to be contracted can be selected by switching the frequency of the power transmission circuit 24.

  When transmitting at the first frequency, the first shape memory spring 211 contracts and the door 11 is angularly displaced upward. Next, when the power transmission circuit 24 is switched to the second frequency, the second shape memory spring 212 is heated, and the door 11 can be returned to the initial position earlier by the contraction force of the second shape memory spring 212. As a result, the operation speed can be improved.

(10th Embodiment)
Next, a tenth embodiment of the present invention will be described with reference to FIG. The drive device 10I of this embodiment is characterized in that two power receiving coils 221, 222 and two power transmitting coils 231, 232 are provided.

  As shown in FIG. 11, the door 11 is provided with two shape memory springs 211 and 212. One end of the first shape memory spring 211 provided above is fixed to the door 11 and the other end is fixed to the upper fixing wall 31. The second shape memory spring 212 provided below has one end fixed to the door 11 and the other end fixed to the lower fixed wall 31. Each shape memory spring 211, 212 constitutes an independent closed circuit.

  Two power transmission coils 231 and 232 are also provided and set to different inductances. The power transmission circuit 24 is configured to be able to transmit by switching a coil to transmit power over the first power transmission coil 231 and the second power transmission coil 232. The first shape memory spring 211 is set with an inductance so as to resonate with the first power transmission coil 231. The second shape memory spring 212 is set with an inductance so as to resonate with the second power transmission coil 232. Accordingly, when the power transmission circuit 24 transmits power through the first power transmission coil 231, the current flows through the first shape memory spring 211 by resonating with the first power reception coil 221 connected to the first shape memory spring 211. Similarly, when the power transmission circuit 24 transmits power with the second power transmission coil 232, the current flows through the second shape memory spring 212 by resonating with the second power reception coil 222 connected to the second shape memory spring 212. Therefore, the shape memory springs 211 and 212 to be contracted can be selected by switching the power transmission coils 231 and 232.

  When transmission is performed by the first power transmission coil 231, the first shape memory spring 211 contracts, and the door 11 is angularly displaced upward. Next, when the second power transmission coil 232 is switched, the second shape memory spring 212 is heated and the door 11 can be returned to the initial position earlier by the contraction force of the second shape memory spring 212. As a result, the operation speed can be improved.

(Eleventh embodiment)
Next, an eleventh embodiment of the present invention will be described with reference to FIG. The drive device 10J of the present embodiment is characterized in that two power receiving coils 221, 222 and two power transmitting coils 231, 232 are provided.

  As shown in FIG. 12, the door 11 is provided with two shape memory springs 211 and 212. One end of the first shape memory spring 211 provided above is fixed to the door 11 and the other end is fixed to the upper fixing wall 31. The second shape memory spring 212 provided below has one end fixed to the door 11 and the other end fixed to the lower fixed wall 31. Each shape memory spring 211, 212 constitutes an independent closed circuit.

  The first power receiving coil 221 connected to the first shape memory spring 211 has windings wound around both surfaces of the door 11 and is wound around a plane direction orthogonal to the thickness direction as a rotation axis. Yes. On the other hand, the second power receiving coil 222 including the second shape memory spring 212 is disposed on the upper surface of the door 11, and a winding is wound around the thickness direction as a rotation axis.

  Two power transmission coils 231 and 232 are also provided and set in different winding directions. The power transmission circuit 24 is configured to be able to transmit by switching a coil to transmit power over the first power transmission coil 231 and the second power transmission coil 232. And the 1st power transmission coil 231 is wound by the same winding direction as the 1st power receiving coil 221 so that magnetic flux may cross the 1st power receiving coil 221. Similarly, the second power transmission coil 232 is wound in the same winding direction as that of the second power reception coil 222 so that the magnetic flux intersects with the second power reception coil 222. Accordingly, when the power transmission circuit 24 transmits power with the first power transmission coil 231, a large amount of magnetic flux interlaces with the first power reception coil 221, and a current flows through the first shape memory spring 211. Similarly, when the power transmission circuit 24 transmits power with the second power transmission coil 232, a large amount of magnetic flux interlaces with the second power reception coil 222, and a current flows through the second shape memory spring 212. Therefore, the shape memory springs 211 and 212 to be contracted can be selected by switching the power transmission coil 23.

  When transmission is performed by the first power transmission coil 231, the first shape memory spring 211 contracts, and the door 11 is angularly displaced upward. Next, when the second power transmission coil 232 is switched, the second shape memory spring 212 is heated and the door 11 can be returned to the initial position earlier by the contraction force of the second shape memory spring 212. As a result, the operation speed can be improved.

(Twelfth embodiment)
Next, a twelfth embodiment of the present invention will be described with reference to FIG. The drive device 10K of the present embodiment is characterized in that a switch circuit 51 is provided.

  As shown in FIG. 13, the door 11 is provided with two shape memory springs 211 and 212. One end of the first shape memory spring 211 provided above is fixed to the door 11 and the other end is fixed to the upper fixing wall 31. The second shape memory spring 212 provided below has one end fixed to the door 11 and the other end fixed to the lower fixed wall 31.

  The power transmission circuit 24 superimposes and transmits a control signal on the power frequency. The control signal is a signal for controlling the switch circuit 51. The switch circuit 51 controls so that a current flows through one of the closed circuits. Therefore, the current flows only in one of the closed circuit including the first shape memory spring 211 and the closed circuit including the second shape memory spring 212.

  Thus, when the power transmission circuit 24 transmits power together with a control signal for turning on the first shape memory spring 211 side, a current flows through the closed circuit formed by the power receiving coil 22 and the first shape memory spring 211, and the first shape memory is stored. A current flows through the spring 211. Similarly, when the power transmission circuit 24 transmits power together with a control signal for turning on the second shape memory spring 212, a current flows through the closed circuit formed by the power receiving coil 22 and the second shape memory spring 212, and the second shape A current flows through the memory spring 212. Therefore, the shape memory springs 211 and 212 to be contracted can be selected by controlling the control signal of the power transmission circuit 24. As a result, the operation speed can be improved.

(13th Embodiment)
Next, a thirteenth embodiment of the present invention will be described with reference to FIG. The drive device 10L of the present embodiment is characterized in that the power receiving coil 22 and the circuit including the shape memory spring 21L are provided independently.

  As shown in FIG. 14, the shape memory spring 21 </ b> L is provided at a position that is not in contact with the power receiving coil 22 and is magnetically connected to the power receiving coil 22. Specifically, a part of the shape memory spring 21 </ b> L is formed in a square frame shape 60 on the surface of the door 11. The power receiving coil 22 is disposed inside the rectangular frame shape 60. This rectangular frame-shaped portion 60 is magnetically connected to the power receiving coil 22. As a result, when a current flows through the power receiving coil 22, induced power is generated in the portion of the square frame 60 that is magnetically connected, and a current flows through the shape memory spring 21L. Even with such a configuration, it is possible to achieve the same operations and effects as in the first embodiment.

  In other words, the power receiving coil 22 formed on the door 11 forms a closed circuit by itself without being connected to the shape memory spring 21L spring, and the power receiving coil 22 is not contacted with the power receiving coil 22 and has a shape separate from that of the rectangular frame. A memory spring is provided. In addition, the matching of the impedance of the shape memory spring 21L and the power receiving coil 22 can be adjusted.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In the first embodiment described above, the resonance capacitor 25 is connected in series so as to resonate with the inductance of the power receiving coil 22 formed on the door 11, but the invention is not limited to series, and may be connected in parallel.

  In the first embodiment described above, the driving device 10 drives the door 11. However, the driving device 10 is not limited to the door 11, and the moving body is moved by the moving force from the driving device 10, for example, the valve of the opening / closing valve of the flow path. It may be a body.

10 ... Drive device 11 ... Door (moving body)
DESCRIPTION OF SYMBOLS 12 ... Supporting point 13 ... Fixed stand 21 ... Shape memory spring (shape memory member) 22 ... Power receiving coil 23 ... Power transmission coil 24 ... Power transmission circuit 25 ... Resonance capacitor 30 ... Fixing hook (fixed position)
31 ... Fixed wall (fixed position) 32 ... Weight 33 ... Return spring 40 ... Air passage 41 ... Air conditioning case 51 ... Switch circuit

Claims (5)

A driving device (10) for applying a moving force to the moving body (11) to displace the moving body,
A coil-shaped shape memory member (21, 21L) having one end provided on the movable body and the other end fixed to a predetermined fixed position (30, 31);
A power receiving coil (22) provided on the movable body and electrically or magnetically connected to the shape memory member;
And a power transmission coil (23) that performs power transmission in a non-contact manner to the power reception coil.   The drive device according to claim 1, further comprising a resonance capacitor (25) electrically connected to the power receiving coil and resonating with an inductance of the power receiving coil.   The driving apparatus according to claim 1, wherein the shape memory member is electrically connected to the power receiving coil to form a closed circuit.   The said shape memory member (21L) is a position which is non-contact with the said receiving coil, Comprising: It is provided in the position magnetically connected with the said receiving coil. Drive device. The moving body is a door that is used in an air conditioner for a vehicle and opens and closes an air passage (40) by angular displacement.
The shape memory member has one end fixed to the door and the other end fixed to an air conditioning case (41) that forms the air passage,
The drive device according to claim 1, wherein the power transmission coil is provided outside the air conditioning case.

Images