JP4745355B2 - Drive device - Google Patents

Description

  The present invention relates to a drive device that drives a housing, and in particular, includes a shaft that rotatably supports an upper housing relative to a lower housing.

In recent years, there is a tendency to prefer watches having a variety of toys such as doll-shaped alarm clocks. This type of timepiece uses a driving device that drives a predetermined part of the casing, and is configured to generate a notification sound from a speaker and drive the casing at a scheduled time. Patent Documents 1 to 3 disclose excellent driving devices used for this type of timepiece.
Japanese Patent No. 3737735 Japanese Patent No. 3813904 JP 2003-66165 A

  Now, with respect to such a drive device, it is important to set an interesting movement and to make effective use of the space inside the housing. For example, the inventor of the present application has proposed a configuration in which a shaft is supported on a lower housing that houses a main body mechanism of a watch, and the upper housing is rotated in a horizontal direction around the shaft, and the design has been attempted. It has been found that the support structure of the shaft for the lower housing is a very important issue. That is, if the shaft extends inside the lower housing, the layout inside the lower housing is significantly restricted, and it is considered that a device for dealing with this problem is necessary.

  This invention is made | formed in view of this situation, The objective is to provide the drive device which simplifies the internal structure while driving a housing | casing rationally.

  The invention described in claim 1 of the present application includes: a lower housing; an upper housing provided on an upper portion of the lower housing; and a shaft that rotatably supports the upper housing with respect to the lower housing. And a driving means that is disposed inside the upper casing and rotates the upper casing with respect to the lower casing around the shaft, the lower casing having a first lower portion having a predetermined shape. A housing member and a second lower housing member are assembled, and a plate member straddling the first lower housing member and the second lower housing member is provided, and a lower end portion of the shaft is formed on the first lower housing member. A pair of semi-cylindrical portions for fitting lower end portions of the shaft are provided on the first lower housing member and the second lower housing member. Each of the plate members is provided with the pair of semi-cylinders. A driving device configured with a hole to insert in a state combined with.

The invention described in claim 2 of the present application is the drive device according to claim 1, wherein the plate member is located inside the upper housing, and the drive means is supported by the plate member .

  ADVANTAGE OF THE INVENTION According to this invention, the drive device formed by simplifying the internal structure while driving a housing | casing rationally can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. The drive device 1 of this example shown in FIGS. 1 to 7 constitutes a doll-shaped alarm clock. The driving device 1 includes a lower housing 210, an upper housing 220 provided on the upper portion of the lower housing 210, a shaft 300 that rotatably supports the upper housing 220 with respect to the lower housing 210, A driving unit 400 disposed inside the housing 220 and rotating the upper housing 220 with respect to the lower housing 210 around the shaft 300 and a speaker 500 supported on the inner surface of the upper housing 220 are provided. Is.

  The lower housing 210 imitates the doll's body, and the upper housing 220 imitates the doll's head. When the predetermined time set in advance is reached, the upper housing 220 rotates forward and backward in the horizontal direction and at the same time generates sound from the speaker 500.

  In the lower housing 210, a time measuring means 110, a battery box 120, and a control circuit (not shown) are accommodated. A time display unit 130 is provided on the front surface of the lower housing 210, and a required operation element 140 is exposed on the back surface. The time measuring means 110, the driving means 400, and the speaker 500 are configured to be controlled by a control circuit.

  The upper housing 220 is provided with a sound hole 220 a at a position corresponding to the speaker 500. Further, the sound quality of the speaker is improved by resonating inside the upper housing 220. That is, the upper housing 220 functions as an enclosure for the speaker 500.

  In the case of this example, the upper housing 220 includes a bearing boss 220 b that loosely fits the upper end portion of the shaft 300. A mounting portion 220c for mounting a constituent member of the bearing boss 220b is provided at an inner surface of the upper housing 220. The lower end portion of the shaft 300 is supported on the lower housing 210 side.

  The driving means 400 includes a motor 410, a rotation output unit 420 that rotates in the horizontal direction by the power of the motor 410, a cam body that is engaged with the rotation output unit 420 and that can swing about the bearing boss 220 b. 430, and an elastic body 440 that supports the cam body 430 and the upper housing 220. Although a specific structure is not particularly limited, in this example, a worm gear connected to an output pinion of the motor 410 rotates the rotation output unit 420. The cam body 430 is a member having a long groove that engages with the rotation output portion 420, and is provided in a state of being penetrated by the bearing boss 220b. The elastic body 440 of this example is a coil spring in which one end is fixed to the cam body 430 and the other end is fixed to the inner surface of the upper housing 220. A hook and a hook engaging portion are provided at one end of the elastic body 440 and the main portion of the cam body, and at the other end of the elastic body 440 and the main surface of the upper housing 220, respectively. Yes. The elastic body 440 is mounted in a state where the hooks are locked to the locking portions and extended to some extent.

  The driving means 400 is provided to be supported by a plate member 213 provided on the upper portion of the lower casing 210.

  A ring-shaped projecting piece 220d is formed on the inner upper surface of the bearing boss 220b, and is devised so that the contact area does not change due to wear on the top of the shaft 300.

  The upper housing 220 is a front and rear divided type housing and is assembled so as to cover the shaft 300 and the driving means 400. The lower casing 210 is prevented from coming off when the bottom surface of the lower casing 210 abuts against the plate member 213.

  According to such a configuration, the cam body 430 swings in conjunction with the rotation output unit 420, and the upper housing 220 rotates forward and backward while being pulled by the elastic body 440. Further, when an external load is applied to the upper housing 440, the elastic body 440 is elastically deformed and the upper housing 220 moves relative to the cam body 430.

  That is, the upper housing 220 can be moved freely by pressing it with a hand. Further, even when the upper casing 220 being driven is touched, the elastic body 440 is elastically deformed, so that there is no concern that the driving unit 400 stops or breaks. When the load is removed, the upper housing 220 returns to its original position by the restoring force of the elastic body 440.

  According to the configuration of this example, since the upper housing 220 acts as an enclosure for the speaker 500, there is an advantage that the sound quality of the speaker 500 is reliably improved. In particular, since the driving means 400 is arranged inside the upper housing 220, there is an effect that the motor sound accompanying the driving of the driving means 400 is efficiently erased. That is, the inconvenience that the motor sound becomes annoying can be solved.

  The structure for supporting the speaker 500 with respect to the inner surface of the upper housing 220 is not particularly limited. In this example, a cylindrical portion 220e surrounding the sound hole 220a is provided on the inner surface of the upper housing 200, and the tip of the cylindrical portion 220 is provided. The speaker 500 is supported. The cylindrical portion 220e is provided with a plurality of openings 220f at appropriate intervals, and the sound generated from the speaker 500 leaks from the openings 220f and diverges inside the upper housing 220.

  Further, the power of the driving unit 400 is transmitted to the upper housing 220 via the elastic body 440. Therefore, the upper housing 220 is relatively easy to resonate with air vibration even during driving, and has a very effective configuration in that it improves the sound quality of the speaker 500. .

  Next, the lower housing 210 of this example will be described. The lower casing 210 is a front / rear split type casing similar to the upper casing 220. Specifically, the first lower housing member 211 and the second lower housing member 212 having a predetermined shape are assembled, and the plate member 213 straddling the first lower housing member 211 and the second lower housing member 212. The lower end of the shaft 300 is sandwiched between the first lower housing member 211 and the second lower housing member 212.

  The first lower housing member 211 and the second lower housing member 212 are provided with a pair of semi-cylindrical portions 211a and 212a for fitting the lower end portion of the shaft 300, respectively. The pair of semi-cylindrical portions 211 a and 212 a protrude toward the inside of the upper housing 220. The lower end portion of the shaft 300 and the pair of semi-cylindrical portions 211 a and 212 a have a shape that is unevenly fitted in the vertical direction, thereby preventing the shaft 300 from coming off from the lower housing 210.

The plate member 213 includes a hole portion 213a into which the pair of semi-cylindrical portions 211a and 212a are combined, a through hole 213b for screwing or pinning the hole portion 213a to the first lower housing member 211, and This is a member provided with a through hole 213c for screwing or pinning to the first lower housing member 211 and a female screw boss 213d for fixing the driving means 400. The plate member 213 is located inside the upper housing 220, and the driving unit 400 is supported by the plate member 213.

When a load is applied to the shaft 300, a force to separate the pair of semi-cylindrical portions 211a and 212a is applied, but since they are inserted into the holes 213a, the separation is performed by the plate member 213. It is suppressed. That is, the plate member 213 effectively acts as a reinforcing member.

  According to such a configuration, the support strength of the shaft 300 can be sufficiently secured, the internal structure of the drive device 1 can be simplified, and the assembly work can be facilitated. That is, for a driving device that rotates the upper housing 220 relative to the lower housing 210 around the shaft 300, the support structure of the shaft 300 with respect to the lower housing 210 is a very important issue. This is because if the shaft 300 extends inside the lower housing 210, the layout inside the lower housing 210 is significantly restricted. According to this example, such inconvenience can be avoided reliably.

  As described above, the driving device of this example is extremely rationally configured as a device that constitutes a doll-shaped alarm clock. In addition, it is needless to say that the configuration of each part in the present example can be appropriately changed in design within the technical scope described in the claims, and is not limited to that illustrated in the drawings.

  The drive device of the present invention can be suitably used as a device constituting a doll-shaped alarm clock.

It is a front view which shows the drive device concerning the Example of this invention. It is a partial see-through front sectional view showing a drive unit according to an embodiment of the present invention. It is a partial see-through | perspective side sectional view which shows the drive device concerning the Example of this invention. FIG. 4 is a side sectional view showing a bearing boss, a cam body, a shaft, a first lower housing member, a second lower housing member, and a plate member according to the embodiment of the present invention. (A) is front sectional drawing which shows a bearing boss | hub and a shaft, and (b) is the A section enlarged view of (a). FIG. 4 is a partial perspective top view showing the main parts of the plate member and the driving means according to the embodiment of the present invention. 1A is a top view of a plate member, FIG. 2B is a front sectional view of the plate member, FIG. 3C is a side view of the plate member, and FIG. 3D is a bottom view of the plate member. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive apparatus 110 Time measuring means 120 Battery box 130 Time display part 140 Operating element 210 Lower housing | casing 211 1st lower housing member 211a Semi-cylindrical part 212 2nd lower housing member 212a Semi-cylindrical part 213 Plate member 213a Hole part 213b Through Hole 213c Through hole 213d Female screw boss 220 Upper housing 220a Sound hole 220b Bearing boss 220c Mounting portion 220d Projection piece 220e Cylindrical portion 220f Opening portion 300 Shaft 400 Driving means 410 Motor 420 Rotation output portion 430 Cam body 440 Elastic body 500 Speaker

Claims (2)

A lower housing, an upper housing provided on an upper portion of the lower housing, a shaft that rotatably supports the upper housing with respect to the lower housing, and an inner portion of the upper housing. And driving means for rotating the upper housing relative to the lower housing around the shaft,
The lower casing is formed by assembling a first lower casing member and a second lower casing member having a predetermined shape, and includes a plate member straddling the first lower casing member and the second lower casing member. ,
The lower end portion of the shaft is sandwiched between the first lower housing member and the second lower housing member,
The first lower housing member and the second lower housing member are each provided with a pair of semi-cylindrical portions for fitting the lower end portions of the shafts,
The drive device according to claim 1, wherein the plate member includes a hole portion into which the pair of semi-cylindrical portions are inserted. It said plate member is configured to position inside the upper housing, wherein the drive means include a drive device according to claim 1, characterized in that supported on the plate member.

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