JP2009095085A - Drive unit and electronic equipment mounting the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which can reduce its number of components and manhour in setup and also can simplify its structure and downsize itself. <P>SOLUTION: An electronic equipment includes a drive unit 3 which has: a motor 1 having a rotating output shaft 7; a mounting plate 4 jutting at the end of the casing 5 of the motor, in the radial direction of the motor; a spigot section 6 projecting from the casing 5 and is provided around the rotation output shaft 7; a plate 2 for mounting, which has a guide hole 2a for guiding the spigot section 6 rotatably; and a locking section 8 whose one end is fixed to the mounting plate 4 and which catches the mounting plate 4 with together with the plate 2 for mounting. At this time, one width of the mounting plate 4 is set within a length which is specified by the diameter of the casing 5. Moreover, a terminal 9 which supplies the motor 1 with a drive signal is provided in a position lying upon the mounting plate 4, in the axial direction of rotation output. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a driving device using a motor used as a driving source of an electronic device typified by an optical information device such as a digital camera and a DVD, and an electronic device equipped with the driving device, and more particularly to a motor mounting structure. About.

In electronic devices typified by optical information devices such as digital cameras and DVDs, motors are widely used as driving sources for movable parts such as lenses. As a method for fixing such a conventional motor, there is generally known a structure in which a mounting plate is welded to the motor and the mounting plate is fastened and fixed to a body to be mounted with screws. In addition, a structure (Patent Document 1) in which an attachment body provided in a motor and an electronic device is directly welded and fixed, or a fixed claw is formed at the output shaft end portion of the motor, and the attachment body is formed on the fixed claw. A structure for press-fitting the formed boss (Patent Document 2 and Patent Document 3), welding a mounting plate to the motor, and engaging a plurality of hooks extending from the mounting plate with holes provided in the mounted body And a structure in which an L-shaped motor folder is bonded and fixed to the outer peripheral surface of the motor, and the motor folder is fastened and fixed to the mounted body with screws (Patent Document 5).
JP-A-10-146002 Japanese Patent Laid-Open No. 2000-232727 JP 2000-232750 A JP 2000-358340 A JP-A-10-75545

  However, in the structure in which the mounting plate is fastened and fixed to the mounted plate with a screw, it is necessary to provide a screw fastening hole, so that there is a limit to the downsizing of the mounting plate. It was. In addition, since the screw fastening operation is performed in a narrow place on the mounting plate, it has become difficult to automate the assembly. Furthermore, even if it relied on human hands, it took time to assemble.

  Further, in the fixing method described in Patent Document 1, since the motor and the mounting plate are directly welded, it is impossible to disassemble and replace them. And the motor and the to-be-attached body at the time of welding are difficult to fit, the jig | tool for a fitting is required, and the subject that the assembly man-hour increases also remained.

  Further, in the fixing methods described in Patent Documents 2 and 3, the motor and the mounting plate cannot be disassembled and replaced. In addition, since the boss is press-fitted into the motor, an extra space is required in the motor. Therefore, the volume of the coil has to be reduced or the length of the rotor magnet has to be shortened, and the output per volume of the motor has been reduced. Further, there is a risk that scraps when the boss is pressed into the motor will enter the motor, resulting in performance degradation and, in some cases, rotation stoppage.

  Further, in the fixing method described in Patent Document 4, since it is necessary to provide a mounting hole in the mounted body, there is a risk that design restrictions such as the arrangement of gears that transmit the output of the motor may occur. It was. In addition, there was a hole after the motor was installed, so dust and light entered. Furthermore, since it does not function as a motor without an attached body, it is difficult to guarantee the performance of the motor alone, and it becomes impossible to replace the motor alone when the motor fails.

  In addition, it is necessary to prepare a mounting plate for each product or for each customer, making inventory management as a motor difficult.

  Moreover, in the said patent document 5, since another component called a motor folder is needed, the electronic device which mounts a motor was enlarged and the cost was increased. Furthermore, the motor and the motor folder are fixed by bonding. However, when the motor is driven, a reaction force acts on the motor, so that it has been unreliable in terms of stable fixing over a long period of time.

  Accordingly, the present invention has been made in order to effectively solve the above-mentioned problems, and its purpose is to reduce the number of parts and assembly man-hours and to easily attach and disassemble the motor without increasing the size of the electronic device. It is to provide a possible structure.

  In order to solve the above-mentioned problems, a drive device according to the present invention includes a motor having a rotation output shaft, a mounting plate extending in the radial direction of the motor at a casing end portion of the motor, and a rotation output shaft protruding from the casing. An inlay portion provided in a state of covering the periphery, a mounting plate having a guide hole for rotatably guiding the inlay portion, and one end of the mounting plate are fixed to the mounting plate, and the mounting plate is sandwiched between the mounting plate. And a locking portion.

  The width of the mounting plate is provided within a width defined by the diameter of the casing.

  More preferably, the terminal for supplying a drive signal to the motor is provided at a position overlapping the mounting plate in the rotational output axis direction.

  According to this, a small drive device can be realized while the motor can be easily removed.

  As described above, according to the drive device according to the present invention, the mounting structure does not require a large space, so that the drive device is not increased in size.

  In addition, it is possible to realize a drive device that can be easily attached to an attached body while the structure of the motor itself remains simple, and that can be easily disassembled.

  Furthermore, according to the electronic device equipped with this drive device, a small electronic device with a small number of components and low cost can be realized.

(Embodiment 1)
A drive device 3 according to Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a driving device 3 in which a motor 1 is attached to a plate 2 to be attached. FIG. 2 is a perspective view showing a state before (preparing) fixing the motor 1 to the mounting plate 2. FIG. 3 is a perspective view of the motor 1 before the motor 1 is fixed to the mounting plate 2.

  Here, the motor 1 is a claw pole type stepping motor in which two stator units are stacked in the rotation output axis direction. A rotation output shaft 7 is provided at the center of the motor 1 to take out the rotation output of a rotor (magnet) (not shown). At the end of the casing 5 of the motor 1, a cylindrical spigot 6 is provided so as to protrude so as to cover the periphery of the rotation output shaft 7. In addition, a mounting plate 4 is provided at one end of the casing 5 so as to protrude in two radial directions of the motor 1 (casing 5). A terminal 9 for supplying a drive signal to the motor 1 is provided on the outer periphery of the casing 5.

  Next, details of the mounted plate 2 and the mounting plate 4 will be described. The mounted plate 2 is a plate-shaped member having two locking portions 8 and a guide hole 2a at the center. Here, one width of the mounting plate 2 is equal to or less than the outer diameter of the motor 1. The locking portion 8 has a cantilever structure in which one end is integrally connected to the protruding portion 2 b of the mounted plate 2. A spring portion 4 a having a cantilever structure is provided on two projecting portions of the mounting plate 4. The spring portion 4a is bent in the thickness direction at the fixed portion.

  Next, a method for fixing the motor 1 to the mounting plate 2 will be described. First, as shown in FIG. 2, the spigot portion 6 of the motor 1 is inserted into the guide hole 2a of the mounted plate 2 at a position where the spring portion 4a, the locking portion 8 and the terminal 9 of the mounting plate 4 do not overlap in the rotational output axis direction. insert. From this state, the motor 1 is rotated counterclockwise to a position where the tip of the spring portion 4 a contacts the locking portion 8. At this time, since the bending amount of the spring portion 4a is maximized, the fixing force of the motor 1 to the mounted plate 2 is maximized. In this state, both the mounting plate 4 and the terminal 9 face the other width direction of the mounted plate 2 (the direction connecting the two locking portions 8 and 8), so that one width of the driving device 3 is the motor 1 ( Since the outer diameter of the casing 5) is determined, the driving device 3 can be thinned.

  1 and 2 show an example in which the attachment plate 4 is provided with the spring portion 4a, the locking portion 8 side may be the spring portion. Furthermore, the mounting plate 4 and the locking portion 8 may be fixed with an adhesive or the like in a state where the mounting plate 4 and the locking portion 8 are engaged without providing a spring member.

(Embodiment 2)
A drive device 17 according to Embodiment 2 of the present invention will be described with reference to FIGS. Here, only differences from the first embodiment will be described.

  FIG. 4 is a perspective view showing the driving device 17 in which the motor 15 is attached to the plate 16 to be attached. FIG. 5 is a perspective view showing a state before (preparing) fixing the motor 15 to the mounting plate 16.

  The two locking portions 19 have a cantilever structure in which one end is integrally connected to the protruding portion 16 a of the mounted plate 16. Further, the locking portion 19 is provided with a hemispherical protrusion 19a, and the mounting plate 18 is provided with a hole 18a that fits into the protrusion 19a.

  Next, a method for fixing the motor 15 to the mounting plate 16 will be described. As shown in FIG. 5, the protrusion 19a is formed in a clockwise direction from the position where the mounting plate 18 projects radially from the end of the casing 5, the locking portion 19 and the terminal 9 do not overlap the rotation output axis. Rotate until fitted to part 18a.

  As a result, the drive device 17 can have a structure having a large holding force even with respect to the moment around the rotation output axis of the motor 15.

(Embodiment 3)
A drive device 22 according to Embodiment 3 of the present invention will be described with reference to FIGS. Here, only differences from the first and second embodiments will be described.

  FIG. 6 is a perspective view showing the driving device 22 in which the motor 20 is attached to the attached plate 21. FIG. 7 is a perspective view showing a state before (preparing) fixing the motor 20 to the mounted plate 21.

  The mounting plate 23 is provided with an extending portion 23 a that extends from the mounting plate 23 in the radial direction of the motor 20. The two locking portions 24 are provided with a rotation restricting portion 24 a having an inclined portion that restricts the extending portion 23 a from rotating around the rotation output shaft 7. The two locking portions 24 have a cantilever structure in which one end is integrally connected to the protruding portion 21 a of the mounted plate 21.

  Next, a method for fixing the motor 20 to the mounted plate 21 will be described. As shown in FIG. 7, the motor 20 is rotated from a position where the extending portion 23a and the rotation restricting portion 24a of the mounting plate 23 and the terminal 9 do not overlap in the rotation output axis direction, and the rotation restricting portion 24a is an inclined portion of the extending portion 23a. Fixing is completed when the rotation is stopped by the wedge effect generated by riding up while sliding.

  6 to 7 show examples in which the portions where the rotation restricting portion 24a and the extending portion 23a are in contact with each other have an inclined portion, but only one of them may have an inclined portion.

(Embodiment 4)
A drive device 27 according to Embodiment 4 of the present invention will be described with reference to FIGS. Here, only differences from the first to third embodiments will be described.

  FIG. 8 is a perspective view showing the driving device 26 in which the motor 25 is attached to the mounted plate 26. FIG. 9 is a perspective view showing a state before (preparing) fixing the motor 25 to the mounted plate 26.

  A mounting plate 40 provided at one end of the casing 5 is provided with a first mounting portion 10 and a second mounting portion 11 that project in two radial directions of the motor 25. Further, the second attachment portion 11 is provided with a hole 11a. The attached plate 26 is provided with a female screw portion 26b.

  Next, a method for fixing the motor 25 to the mounting plate 26 will be described. After inserting the inlay portion 6 into the guide hole 2a, the first attachment portion 10 has a cantilever structure in which one end is integrally connected to the protruding portion 26a of the attached plate 25 as shown in FIG. It rotates so that it may engage with the latching | locking part 28. FIG. And it installs so that the hole 11a and the internal thread part 26b which are open to the 2nd attachment part 11 may overlap, and both are fastened with the screw 12. FIG.

  In addition, by setting it as such a structure, compared with the case where it fastens with the screw | thread with respect to the 1st attachment part 10, size reduction is attained.

(Embodiment 5)
A drive device 31 according to Embodiment 5 of the present invention will be described with reference to FIGS. Here, only differences from the fourth embodiment will be described.

  FIG. 10 is a perspective view showing a driving device 31 in which a motor 29 is attached to a plate 30 to be attached. FIG. 11 is a perspective view showing a state before (preparing) fixing the motor 29 to the attachment plate 30.

  The attachment plate 41 is provided with a first attachment portion 32 and a second attachment portion 33, the first attachment portion 32 has a first hole portion 32 a, and the attached plate 30 has a second hole portion. 30b is provided, and the pin 13 inserted in these two holes is provided.

  Next, a method for fixing the motor 29 to the mounting plate 30 will be described. As shown in FIG. 10, the first mounting portion 32 is rotated so that one end is engaged with a locking portion 34 having a cantilever structure integrally connected to the protruding portion 30 a of the mounted plate 30. And it installs so that the 1st hole 32a provided in the 1st attaching part 32 and the 2nd hole 30b provided in the to-be-attached board 30 may overlap, and if pin 13 is inserted there, it will fix. Complete.

  The pin 13 at this time may also serve as a rotation guide for the power transmission member that transmits the output of the rotation output shaft 7.

(Embodiment 6)
A digital camera 14 (electronic device) according to Embodiment 5 of the present invention will be described with reference to FIG.

  FIG. 12 is a perspective view showing a digital camera 14 (electronic device) provided with any one of the driving devices 3, 17, 22, 27, and 31 of the present invention.

  The digital camera 14 is mounted with any one of the driving devices 3, 17, 22, 27, and 31 described in the first to fifth embodiments. Outputs of the driving devices 3, 17, 22, 27, and 31 are transmitted to a lens body (not shown) of the digital camera 14 to perform zooming, autofocusing, camera shake correction, and the like.

It is a perspective view which shows the drive device with which the motor for describing Embodiment 1 of this invention was attached to the to-be-attached board. FIG. 2 is a perspective view showing a state before (preparation) a motor is attached to an attachment plate in the drive device shown in FIG. 1. FIG. 2 is a perspective view of each stage before (preparation) mounting the motor to the mounted plate in the drive device shown in FIG. 1. It is a perspective view which shows the drive device with which the motor for describing Embodiment 2 of this invention was attached to the to-be-attached board. FIG. 5 is a perspective view showing a state before (preparation) a motor is attached to an attachment plate in the drive device shown in FIG. 4. It is a perspective view which shows the drive device with which the motor for describing Embodiment 3 of this invention was attached to the to-be-attached board. FIG. 7 is a perspective view showing a state before (preparation) a motor is attached to an attachment plate in the drive device shown in FIG. 6. It is a perspective view which shows the drive device with which the motor for demonstrating Embodiment 4 of this invention was attached to the to-be-attached board. FIG. 9 is a perspective view of the drive device shown in FIG. 8 before (preparation) stage of attaching the motor to the attachment plate. It is a perspective view which shows the drive device with which the motor for describing Embodiment 5 of this invention was attached to the to-be-attached board. FIG. 11 is a perspective view of each stage before (preparation) a motor is attached to an attachment plate in the drive device shown in FIG. 10. It is a perspective view of the digital camera carrying the drive device of this invention.

Explanation of symbols

1, 15, 20, 25, 29 Motor 2, 16, 21, 26, 30 Mounted plate 2a Guide hole 2b, 16a, 21a, 26a, 30a Projection part 26b Female thread part 30b Second hole part 3, 17, 22, 27, 31 Driving device 4, 18, 23, 40, 41 Mounting plate 4a Spring portion 18a Hole portion 23a Extension portion 5 Casing 6 Inlay portion 7 Rotation output shafts 8, 19, 24, 28, 34 Locking portion 19a Protrusion 24a Rotation restriction part 9 Terminals 10, 32 First attachment part 11, 33 Second attachment part 11a Hole 32a First hole part 12 Screw 13 Pin 14 Digital camera

Claims (13)

A motor having a rotary output shaft;
At the casing end of the motor, a mounting plate provided extending in the radial direction of the motor;
An inlay portion protruding from the casing and provided around the rotary output shaft;
A mounted plate having a guide hole that rotatably guides the inlay part;
One end is fixed to the mounting plate, and a locking portion that holds the mounting plate with the mounted plate,
A drive device comprising:   The drive device according to claim 1, wherein one width of the mounting plate is provided to a length defined by a diameter portion of the casing.   The drive device according to claim 2, wherein a terminal for supplying a drive signal to the motor is provided at a position overlapping the mounting plate in the rotation output axis direction.   4. The driving device according to claim 1, wherein any one of the portions where the attachment plate portion and the locking portion engage with each other is configured by a spring member. 5.   5. The driving device according to claim 1, wherein the locking portion of the mounted plate portion has a protrusion, and the mounting plate has a hole portion that engages with the protrusion. 6. .   The drive device according to claim 5, wherein a portion of the protrusion that contacts the hole is hemispherical. An extending part extending from the mounting plate;
A rotation restricting portion that is provided in the locking portion and restricts the extension portion of the previous period from rotating around the rotation output shaft;
5. The drive device according to claim 1, wherein the drive device is provided.   The drive device according to claim 7, wherein the rotation restricting portion includes an inclined portion in contact with the extending portion.   The drive device according to claim 7, wherein the rotation restricting portion is a recess with which the extending portion is engaged. In the mounting plate, a first mounting portion and a second mounting portion projecting in the two radial directions of the motor,
A hole provided in the second attachment portion;
A female screw portion provided on the attached plate;
A screw for fastening the second attachment portion and the plate to be attached;
5. The drive device according to claim 1, wherein the drive device is provided. In the mounting plate, a first mounting portion and a second mounting portion projecting in the two radial directions of the motor,
A first hole provided in the first attachment portion;
A second hole provided in the attached plate;
A pin inserted into the first hole and the second hole;
5. The drive device according to claim 1, wherein the drive device is provided.   The drive device according to claim 11, wherein the pin also serves as a rotation guide of a power transmission member that transmits an output of the rotation output shaft.   The electronic device carrying the drive device as described in any one of Claims 1 thru | or 8.

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