JP2524377Y2 - Sun visor using multi-output ultrasonic motor - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a small and complicated operation using a multi-output ultrasonic motor capable of obtaining a plurality of independent high-torque outputs. About the sun visor.

[Prior art] Automobile systems (window opening / closing, seat movement, etc.)
Many electric motors that use electromagnetic force are used as power sources for FA systems (robots, etc.). Since these motors are generally of low torque and high rotation type, they are often driven by obtaining high torque by a reduction gear or the like.

These systems are required to have a variety of movements in accordance with the sophistication and diversification of needs, and a large number of mutually independent power sources are required in order to realize the movements. In general, when obtaining independent power sources, a plurality of electric motors applying electromagnetic force and a plurality of reduction gears are used in combination, so that the structure of the entire system becomes complicated and large. At present, the number of parts has also increased significantly. In addition, although operable ones can be constituted by these combinations, there is a problem that the system cannot be mounted because of its large size, and there are many systems that cannot be realized.

Recently, low-speed, high-torque ultrasonic motors have attracted attention, and among ultrasonic motors, those having two output shafts for various operations have been known (Japanese Patent Application Laid-Open No. Sho 64-64).
No. 30472, JP-A-63-262071, JP-A-63-958
No. 69, etc.).

There is also a sun visor provided above a front window of an automobile which can be operated by a DC motor (Japanese Utility Model Application Laid-Open No. 62-25214). In this case, the high-speed, low-torque DC motor operates the sun visor via the reduction gear and uses only one motor, so that only one operation, that is, raising and lowering of the sun visor is performed.

[Problem to be Solved by the Invention] Among the above-described conventional ultrasonic motors, those provided with two output shafts have a configuration in which the output shafts protrude to opposite sides. It was inconvenient to do so, and having two output shafts could not be used effectively. In addition, simply raising and lowering the sun visor cannot be moved as a day except in all cases, and improvement has been desired.

Therefore, the present invention uses a single ultrasonic motor provided with a plurality of output shafts that can rotate independently of the ultrasonic motor so that the sun visor of the vehicle can be moved between the front window side and the side window side. Further, it is an object of the present invention to make it possible to raise and lower the sun visor, to reduce the size of the drive unit of these devices, and to simplify the configuration.

[Means for Solving the Problems] The present invention is a sun visor using a multi-output ultrasonic motor that has achieved the above-mentioned object, and it is provided with guide members on a front window side and a side window side of an automobile, respectively. Both of them hold both ends of the sun visor movably. The output shaft on the outer peripheral side of the ultrasonic motor allows one end of the sun visor to move along the guide member, and the output shaft on the inner peripheral side moves up and down about 180 ° around the longitudinal axis of the sun visor. To be able to rotate.

When the sun visor is held by the L-shaped pipe, the two output shafts of the ultrasonic motor can rotate the flexible shaft and the L-shaped pipe passed through the L-shaped pipe. By rotating the L-shaped pipe on the output shaft on the outer peripheral side of the motor to swing the pipe, the sun visor can be moved in the horizontal direction, and the output shaft on the inner peripheral side of the motor is flexible. The sun visor can be turned up and down by rotating the shaft in a range of about 180 °.

[Operation] In the sun visor using the above multi-output ultrasonic motor, when both ends of the sun visor are held by the front window side guide member and the side window side guide member, the outer peripheral side of the multi output ultrasonic motor is By rotating the output shaft, the gear rolls on the rack gear, and one end of the sun visor moves along the guide member, whereby the sun visor can be changed between the front window side and the side window side. The sun visor can be raised and lowered by rotating the output shaft on the inner peripheral side of the multi-output ultrasonic motor.

In the ultrasonic motor, a self-holding force acts on the rotor due to a frictional force between the stator and the rotor, so that the sun visor can be held at a predetermined position or in a raised state. Further, the rotor can be slid with respect to the stator when a relatively large force is applied, so that the sun visor can be manually operated.

Embodiment A first embodiment of a sun visor using the multi-output ultrasonic motor of the present invention will be described with reference to FIGS.

As shown in FIG. 1, in a cylindrical casing 1 having an end frame 1a and a cover 1b of a multi-output ultrasonic motor used for the operation of a sun visor, a middle frame 2 is provided at a central portion. The motor mechanisms are arranged on both sides of the middle frame 2 with the same rotation axis direction.

A disk-shaped stator 3 is fixed on the middle frame 2, and a piezoelectric body 4 is bonded to an outer periphery of a lower surface of the stator 3. As is well known, two sets of piezoelectric bodies 4 are provided, and a high-frequency voltage having a phase difference of 90 ° is applied to each of the piezoelectric bodies 4 so that the stator 3 is provided.
A traveling wave is generated. Stator 3
A disk-shaped rotor 5 is superimposed on the upper surface of the rotor 3, which is pressed by a leaf spring 6 to press the rotor 5 against the stator 3,
The rotor 5 is rotated by the traveling wave.
The leaf spring 6 is held by the cover 1b of the casing 1 via the plate 7 and the bearing 8. A rod-shaped output shaft 9 is attached to the center of the rotor 5, and the upper end of the output shaft 9 is held by the bearing 8, and the lower end protrudes outside through the center holes of the middle frame 2 and the end frame 1 a. Is done. A bearing 10 is provided in the center hole of the middle frame 2, thereby holding the output shaft 9 rotatably.

The stator 11 is also fixed on the end frame 1a of the casing 1, and the piezoelectric body 12 is adhered to the outer periphery of the lower surface thereof, so that a traveling wave can be generated as described above. Stator 11
A rotor 13 is superimposed on the upper surface, and is pressed by a leaf spring 14 so that the rotor 13 is pressed against the stator 11, and the rotor 13 is rotated by a traveling wave of the stator 11. The leaf spring 14 is held on the lower surface of the middle frame 2 via the plate 15 and the bearing 16. At the center of the rotor 13, a hollow output shaft 17 is mounted. The upper portion of the hollow output shaft 17 is held by the bearing 16, and the lower portion is an end frame 1a.
Is held by a bearing 18 provided in a central hole of the second member and protrudes to the outside. The hollow output shaft 17 is connected to the rod-shaped output shaft 9.
Are penetrating.

As described above, in the ultrasonic motor having two motor mechanisms, the output shaft 9 and the hollow output shaft 17 protrude in the same direction and can rotate without interfering with each other. For this reason, it is small and can take various movements, and it is possible to cope with a multifunctional system.

In the above description, the two output shafts are arranged concentrically and doubly. However, a separate stator and a rotor are further arranged on the output shaft projecting side in FIG. If the two hollow output shafts are arranged concentrically on the outer periphery of the hollow output shaft 17, a triple output shaft is obtained. Similarly, it is also possible to arrange output shafts in a multiplex manner.

Next, it can be used instead of the ultrasonic motor of FIG.
An ultrasonic motor having three output shafts will be described with reference to FIG.

Double cylindrical casing 21 having an inner cylinder 21a and an outer cylinder 21b
Has a middle frame 2 in which the inner cylinder 21a is perpendicular to its central axis.
It is divided into two by two. A stator 23 is fixed on the upper surface of the middle frame 22. The piezoelectric body 24 is bonded to the stator 23 in the same manner as described above to generate a traveling wave. A rotor 25 is superimposed on the stator 23, which is pressed by a leaf spring 26 to press the rotor 25 against the stator 23, and the rotor 25 is
Is designed to rotate. The leaf spring 26 is a plate 27,
It is held on the upper wall 21c of the casing 21 via the bearing 28. An output shaft 29 is attached to the center of the rotor 25, the upper part of which is held by the bearing 28 and protrudes to the outside, and the lower part is rotatably held by a bearing 30 provided on the middle frame 22.

Stator through the felt 31 on the lower surface of the middle frame 22
A rotor 33, a leaf spring 34, and a plate 35 are sequentially arranged below the fixed member 32, and a traveling wave is generated in the stator 32 by the piezoelectric body 36 bonded to the stator 32 in the same manner as described above. Is to be rotated. Output shaft in the center of rotor 33
37 is attached, the upper part of which is held by bearings 38 provided on the middle frame 22, and the lower part is the bottom wall 21 of the casing 21.
It is held by the bearing 39 provided in the center hole of d and protrudes to the outside. The bearing 39 holds the plate 35. In such a configuration, the output shaft 37 is connected to the output shaft 29.
And project in opposite directions to each other.

A ring-shaped stator 40 is fixed to a bottom wall 21d between the inner cylinder 21a and the outer cylinder 21b of the casing 21, and a piezoelectric body 41 is attached to the lower surface thereof so that traveling waves can be generated in the same manner as described above. ing. A ring-shaped rotor 42 is overlaid on the stator 40,
It is configured to be pressed by a leaf spring 43 to bring the rotor 42 into pressure contact with the stator 40 and rotate it. The leaf spring 43 is held by a bearing 45 provided on the upper wall 21c of the casing 21 via a plate 44. The rotor 42 includes a cylindrical portion 42a and a rotating wheel 42b. Upper and lower ends of the cylindrical portion 42a are rotatably held by the bearing 45 and a bearing 46 provided on the bottom wall 21d side of the casing 21. Further, the rotating wheel 42b protrudes to the outside from a cut groove of the outer cylinder 21b of the casing 21 so that output can be transmitted therefrom.

Although the ultrasonic motors shown in FIGS. 1 and 2 have two or three output shafts, an arbitrary number of output shafts can be obtained by appropriately combining the motor mechanisms of the ultrasonic motors shown in FIGS. A multi-output ultrasonic motor having an output shaft can be created.

For example, an ultrasonic motor having two output shafts in the same direction shown in FIG. 1, an output shaft protruding in a direction opposite to the output shaft, a rotor rotating integrally therewith, and a traveling wave acting on the rotor. When the stator is assembled, an ultrasonic motor having three output shafts is obtained. Also, the ultrasonic motor having three output shafts is obtained by combining the outer periphery of the ultrasonic motor having two output shafts shown in FIG. 1 with the ring-shaped motor mechanism shown in FIG.

Further, if two sets of ultrasonic motors having two output shafts shown in FIG. 1 are used and assembled so that their output shafts face in opposite directions, an ultrasonic motor having four output shafts is obtained. When the ring-shaped motor mechanism shown in FIG. 2 is combined with the outer periphery of the ultrasonic motor having four output shafts, the ultrasonic motor has five output shafts. Further, it is also possible to provide five or more output shafts by combining the motor mechanism having three or more output shafts described in FIG. 1 as described above.

Next, a first embodiment of a sun visor using the multi-output ultrasonic motor will be described with reference to FIGS.

Front wind side 50 and side wind side 51 of the car
In addition, guide members 52 and 53 that are long in the horizontal direction are provided, and the shafts 55 and 56 projecting at both ends of the sun visor 54 are held so as to be movable along the two guide members 52 and 53, respectively. That is, the protruding shafts 55, 56 are provided with spherical portions 55a, 56a, which are guided by the guide grooves 52a, 53a of the guide members 52, 53.

One protruding shaft 56 of the sun visor 54 is connected to a rod-shaped output shaft 9 of the multi-output ultrasonic motor A of FIG. 1 via a flexible shaft 57 so that the sun visor 54 can be raised and lowered by rotation of the output shaft 9. It has become. A gear 58 is attached to the outer periphery of the hollow output shaft 17 of the ultrasonic motor A, and the gear 58 is a rack gear 59 provided along the guide member 53.
It can be rolled on. Also rack gear 59
A guide member 61 protruding from the casing 1 of the ultrasonic motor A is slidably engaged with the rail groove 60, and the gear 58 rolls on the rack gear 59 so that the ultrasonic motor A A is moved stably. The ultrasonic motor A is disposed inside the vehicle, and is held by the guide member 53 on the vehicle side via the guide member 61 and the gear 58.

The sun visor is configured as described above, and the ultrasonic motor A
By rotating the hollow output shaft 17 of the sun visor 54,
Can be moved to any position on the front window side 50 and the side window side 51. By rotating the rod-shaped output shaft 9 of the ultrasonic motor A in a range of about 180 °, the sun visor 54 can be raised and lowered. The ultrasonic motor has a self-holding force since the rotor generates friction with respect to the stator, and can hold the sun visor 54 at a predetermined position. In addition, since the rotor slides against the stator with a relatively large force, the sun visor 54
Can also be operated manually.

When the sun visor is operated, if the output shafts of the ultrasonic motor are separately rotated without interfering with each other by a simple switch operation or a signal from a sunlight sensor or the like, manual operation can be performed by automatic operation or the like. The sun visor can be operated in various ways without trouble, and the sunlight can be satisfactorily blocked in all directions. Since the ultrasonic motor has a low speed and a high torque, a reduction gear is not required, so that the whole apparatus can be downsized and the driving noise is small.

Next, a second embodiment of the sun visor will be described with reference to FIG.

A cup-shaped stay 63 is provided at one longitudinal end of the sun visor 62.
Is mounted so that its opening is on the outside. The stay
One end of an L-shaped pipe 64 is rotatably fitted to 63, and convex and concave portions are provided so as to engage with both the stay 63 and the fitting portion of the pipe 64 so as not to come out. The other end of the pipe 64 is connected to the hollow output shaft 17 of the ultrasonic motor A shown in FIG. 1 so that the sun visor 62 can be swung horizontally by the rotation of the hollow output shaft 17. Note that the ultrasonic motor A is disposed inside the vehicle, and its casing is fixed to the vehicle body. A flexible shaft 65 is connected to the rod-shaped output shaft 9 of the ultrasonic motor A, and the flexible shaft 65 is connected to the stay 63 through a pipe 64,
By rotating the output shaft 9 within a range of about 180 °, the stay can be rotated to raise and lower the sun visor 62.

The sun visor of this embodiment is automatically operated similarly to the first embodiment, and is operated in two directions with the special effect of the ultrasonic motor.

Although the multi-output ultrasonic motor shown in FIG. 1 is used in the above embodiment, the multi-output ultrasonic motor shown in FIG. 2 may be used instead. Alternatively, each motor mechanism shown in FIGS. It is also possible to use a multi-output ultrasonic motor appropriately combined.

[Effects of the Invention] The sun visor using the multi-output ultrasonic motor of the present invention can move the sun visor to the front window side and the side window side with one motor, can raise and lower the sun visor, and determine the direction of sunlight. Even in such a state, the sun visor can be moved to an appropriate state. In that case, the ultrasonic motor does not require a speed reducer, so that the entire device can be reduced in size and the driving noise is low, which is desirable for mounting on an automobile.

[Brief description of the drawings]

1 is a sectional view of a multi-output ultrasonic motor used for operating the sun visor of the present invention, FIG. 2 is a sectional view of a multi-output ultrasonic motor having three output shafts, and FIG. 3 is a sun visor of the first embodiment. 4 and 5 are partial sectional views of the sun visor, and FIG. 6 is a partially cutaway view of the sun visor of the second embodiment. 3; stator, 5; rotor 9; output shaft, 11; stator 13; rotor, 17; hollow output shaft 23; stator, 25; rotor 29; output shaft, 32; stator 33; rotor , 37; output shaft 40; stator, 42; rotor 52; guide member, 53; guide member 54; sun visor, 59; rack gear 62; sun visor, 64; pipe 65; flexible shaft

Claims (2)

(57) [Scope of request for utility model registration] 1. A guide member long in the horizontal direction is provided on each of a front window side and a side window side of an automobile,
The two ends of the sun visor are movably held by the two guide members, and one end of the sun visor is connected to the output shaft on the inner peripheral side of a multi-output ultrasonic motor having at least two concentric output shafts. A sun visor, wherein a gear is connected to an outer peripheral output shaft of an ultrasonic motor, and a rack gear for guiding rolling of the gear is provided along the guide member at an adjacent position. 2. A cup-shaped stay is attached to one end of a sun visor to be attached to an automobile, one end of a substantially L-shaped pipe is rotatably fitted to the stay, and at least a concentric two-piece is attached to the other end of the pipe. A sun visor, wherein an outer peripheral output shaft of a multi-output ultrasonic motor having an output shaft is connected, and an inner peripheral output shaft of the multi-output ultrasonic motor is connected to the stay via a flexible shaft.