JP3813904B2 - DRIVE DEVICE AND WATCH HAVING THE SAME - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a driving device driven by a motor.
[0002]
[Prior art]
In general, a toy drive device has a structure in which a rigid element such as a gear or a cam is connected to a motor to obtain various movements from a simple movement of the motor. Such a driving device is also used, for example, for decoration of a timepiece, and the timepiece having the driving device is configured to generate a notification sound at a scheduled time and to drive the driving device.
[0003]
[Problems to be solved by the invention]
By the way, in recent years, there has been a tendency to prefer watches that are rich in taste as toys, such as karakuri clocks and doll-shaped alarm clocks, and the drive devices used for this type of clock are more rationally constructed. It is desired. Specifically, the important points in the drive device are that an interesting movement can be obtained, that there is less fear of failure or breakage, that the structure is simple, and that it is easily assembled.
[0004]
This invention is made | formed in view of this situation, The objective is to provide the more excellent drive device.
[0005]
[Means for Solving the Problems]
The invention described in claim 1 of the present application includes a motor, a shaft, a drive transmission member that is rotatably attached to the shaft, a rotation attachment that is rotatably attached to the shaft, and the drive transmission member. A coupled cam body, an elastic body that biases the cam body toward the drive transmission member, a movable portion provided with a protrusion that engages with the cam body, and a shaft portion that pivotally supports the movable portion And when the motor rotates the drive transmission member, the cam body rotates and the movable part swings up and down around the shaft part. The movable part is caused by its own weight. The protrusion is brought into a position where it engages with the cam body, and when the movable portion is moved upward by an external force , the protrusion of the movable portion is detached from the cam body, movement of the movable portion toward the bottom by an external force That when, by the cam member wherein the elastic member is being compressed slides relative to the shaft, a drive device in which the cam member is disengaged from said drive transmitting member. According to such a configuration, an excellent drive device can be obtained.
[0006]
That is, the present invention is a drive device that moves a movable part by a rotating cam body. When the movable portion is moved by an external force, the movable portion is detached from the cam body, or the cam body is detached from the drive transmission member, and the power of the motor is not transmitted to the movable portion. That is, even if the movable part is moved in a direction opposite to the power of the motor, a situation in which an excessive load is applied to the motor is avoided. That is, even when the movable part is restrained by an external force when the motor is driven, troubles such as failure and breakage are prevented. In addition, when the movable part is released, the cam body detached from the drive transmission member returns to a predetermined position by the urging force of the elastic body and is connected to the drive transmission member again.
[0007]
According to the second aspect of the present invention, in the first aspect, the cam body includes a first cam body directly connected to the drive transmission member, and the drive transmission member via the first cam body. A second cam body connected to the first cam body, and the second movable body driven by the second cam body. Device. Further, the invention described in claim 3 of the present application is that, in claim 2, taper surfaces inclined at a predetermined angle with respect to the shaft are respectively provided at opposing portions of the first cam body and the second cam body. The drive device is configured such that the first cam body and the second cam body are connected by contacting the tapered surfaces with each other. According to such a structure, it becomes possible to obtain a more complicated movement efficiently by moving the movable part by each of the plurality of cam bodies.
[0008]
The invention described in claim 4 of the present application is any one of claims 1 to 3 , further comprising a housing on which the movable portion is mounted, the motor, the shaft, the drive transmission member, the cam body, and the elastic member. A driving device having a configuration in which a body is disposed inside the casing and the movable portion protrudes outside the casing. According to such a configuration, the appearance of the drive device is set to be more interesting. In particular, the present invention is suitable for the case and the movable part imitating a doll.
[0009]
The invention described in claim 5 of the present application is a timepiece having the structure including the driving device according to any one of claims 1 to 4 . That is, such a drive device can be used very suitably as a decoration for a timepiece.
[0010]
The character doll is formed by disposing a pair of first movable parts 111 that present both left and right legs and a pair of second movable parts 112 that represent both left and right arms on a hollow doll-shaped case 110. Each of the first movable portion 111 and the second movable portion 112 is pivotally supported by a shaft portion 110 a provided inside the doll-shaped case 110, and has a distal end projecting outside the doll-shaped case 110. ing. In addition, an opening for allowing the distal end portions of the first movable portion 111 and the second movable portion 112 to escape to the outside is formed at a key point of the doll-shaped case 110.
[0011]
The driving device 100 of the present example is mounted on a motor 120 having a worm gear 121 mounted on an output shaft, a shaft 130 having both ends fixed to upper and lower support portions 131 and 132, and a shaft 130 that is rotatable. Drive transmission member 140, first cam body 150 rotatably attached to shaft 130 and directly connected to drive transmission member 140, and first cam body rotatably attached to shaft 130 A second cam body 160 coupled to the drive transmission member 140 via 150, and an elastic body (coil spring in the illustrated example) 170 that biases the first cam body 150 and the second cam body 160 toward the drive transmission member; The pair of first movable parts 111 that follow the first cam body 150 and the pair of second movable parts 112 that follow the second cam body 160 are assembled.
[0012]
The motor 120, the shaft 130, the drive transmission member 140, the first cam body 150, the second cam body 160, and the elastic body 170 are disposed inside the watch case 2 and the doll-shaped case 110 that are cases.
[0013]
The drive transmission member 140 is a gear that meshes with the worm gear 121. Protrusions 111 a and 112 a that are engaged with the first cam body 150 and the second cam body 160 are provided at the base ends of the first movable section 111 and the second movable section 112, respectively. When the motor 120 rotates the drive transmission member 140, the first cam body 150 and the second cam body 160 rotate in synchronization with the drive transmission member 140, and the first movable portion 111 and the second movable portion 112 It swings up and down around each shaft part 110a. The swinging form of the first movable part 111 and the second movable part 112 is appropriately set according to the shapes of the first cam body 150 and the second cam body 160.
[0014]
The drive transmission member 140, the first cam body 150, the second cam body 160, and the elastic body 170 are members that pass through the shaft 130. When the drive device 100 is assembled, these are sequentially applied to the shaft 130. After passing, the shaft 130 is fixed between the upper and lower support portions 131 and 132. The elastic body 170 is mounted between the upper support portion 131 and the second cam body 160. According to such a configuration, there is an advantage that these members can be positioned accurately and easily.
[0015]
In the case of this example, the first movable portion 111 and the second movable portion 112 protruding to the outside of the doll-shaped case 110 can be arbitrarily moved by the user of the alarm clock 1 picking them with fingers.
[0016]
That is, as shown in FIG. 5, the drive transmission member 140, the first cam body 150, the first movable portion 111, the second cam body 160, and the second movable portion 112 are normally connected to each other, and the motor 120 Drive simultaneously with power. The drive transmission member 140 and the first cam body 150 have a concave-convex shape at their opposing portions, and are connected by fitting these concave-convex portions together. Further, the first cam body 150 and the second cam body 160 have tapered surfaces that are inclined at a predetermined angle with respect to the shaft 130, and are connected by abutting these tapered surfaces with each other. Has been.
[0017]
As shown in FIG. 6, when the first movable portion 111 is moved to one side by an external force, the protrusion 111 a of the first movable portion 111 is detached from the first cam body 150. In this case, the power of the motor 120 is not transmitted to the first movable part 111. Note that when the first movable portion 111 is released from an external force, the first movable portion 111 returns to a predetermined position by its own weight, and the protruding portion 111a is engaged with the first cam body 150 again. Similarly, when the second movable portion 112 is moved to one side by an external force, the protrusion 112 a of the second movable portion is detached from the second cam body 160. In this case, the power of the motor 120 is not transmitted to the second movable part 112. When the second movable portion 112 is released, it returns to a predetermined position due to its own weight, and the projection 112a engages with the second cam body 160 again.
[0018]
Further, as shown in FIG. 7, when at least one of the first movable parts 111 is moved to the other by an external force, the first cam body 150 and the second cam body 160 are attached to the shaft 130 while the elastic body 170 is compressed. By sliding against the first cam body 150, the first cam body 150 is detached from the drive transmission member 140. In this case, the power of the motor 120 is not transmitted to the first movable part 111 and the second movable part 112. The first cam body 150 detached from the drive transmission member 140 returns to a predetermined position by the urging force of the elastic body 170 when the first movable portion 111 is released, and is connected to the drive transmission member 140 again. The
[0019]
Further, as shown in FIG. 8, when at least one of the second movable parts 112 is moved to the other by an external force, the second cam body 160 slides with respect to the shaft 130 while the elastic body 170 is compressed. The second cam body 160 is detached from the first cam body 150 and the drive transmission member 140. In this case, the power of the motor 120 is not transmitted to the second movable part 112. The second cam body 160 detached from the first cam body 150 and the drive transmission member 140 returns to a predetermined position by the urging force of the elastic body 170 when the second movable portion 112 is released, and the second cam body 160 again. 1 cam body 150 and drive transmission member 140 are connected.
[0020]
According to such a configuration, even if the first movable unit 111 and the second movable unit 112 are moved in a direction opposite to the power of the motor 120, a situation in which an excessive load is applied to the motor 120 can be avoided. That is, even when the first movable unit 111 and the second movable unit 112 are restrained by an external force when the motor 120 is driven, troubles such as failure and breakage can be prevented.
[0021]
As described above, the drive device of this example has an interesting movement, and has achieved failure and breakage prevention, simplification of structure, and ease of assembly, and decorates an alarm clock. It can be used very suitably. Of course, the configuration of the driving device of this example can also be applied to a clockwork clock and various other toys.
[0022]
【The invention's effect】
The present invention includes a motor, a shaft, a drive transmission member rotatably attached to the shaft, a cam body rotatably attached to the shaft and connected to the drive transmission member, An elastic body that urges the cam body toward the drive transmission member; a movable portion provided with a protrusion that engages with the cam body; and a shaft portion that pivotally supports the movable portion; By rotating the drive transmission member, the cam body rotates, and the movable portion swings up and down around the shaft portion. The movable portion has its protrusion protruding from the cam body by its own weight. and is intended to be brought to a position engaging, when the movable part is moved towards the top by an external force, protrusion of the movable part is disengaged from the cam member, the force the movable part outside the and it moved downwardly by the elastic body pressure By the cam member being slides relative to the shaft, a drive device in which the cam member is disengaged from said drive transmitting member. According to such a configuration, an excellent drive device can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an alarm clock according to a specific example of the present invention.
FIG. 2 is a side view showing an alarm clock according to a specific example of the present invention.
FIG. 3 is a front sectional view showing an alarm clock according to a specific example of the present invention.
FIG. 4 is a side cross-sectional view showing an alarm clock according to a specific example of the present invention.
FIG. 5 is an explanatory diagram showing a main part of a driving device according to a specific example of the present invention.
FIG. 6 is an explanatory diagram showing a main part of a drive device according to a specific example of the present invention.
FIG. 7 is an explanatory diagram showing a main part of a driving device according to a specific example of the present invention.
FIG. 8 is an explanatory diagram showing a main part of a drive device according to a specific example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Alarm clock 2 Clock case 3 Time display part 100 Drive apparatus 110 Doll type case 110a Shaft part 111 1st movable part 111a Protrusion part 112 2nd movable part 112a Protrusion part 120 Motor 121 Worm gear 130 Shaft 131 Support part 132 Support part 140 Drive Transmission member 150 First cam body 160 Second cam body 170 Elastic body

Claims (5)

A motor, a shaft, a drive transmission member rotatably attached to the shaft, a cam body rotatably attached to the shaft and coupled to the drive transmission member; and the cam body An elastic body that urges toward the drive transmission member; a movable portion provided with a protrusion that engages with the cam body; and a shaft portion that pivotally supports the movable portion ;
When the motor rotates the drive transmission member, the cam body rotates, and the movable part swings up and down around the shaft part ,
The movable part is brought to a position where the protrusion is engaged with the cam body by its own weight,
When the movable part is moved upward by an external force, the protrusion of the movable part is detached from the cam body, and when the movable part is moved downward by an external force , the elasticity The cam body is detached from the drive transmission member by sliding the cam body with respect to the shaft while the body is compressed. As the cam member, wherein the first cam member coupled directly to the drive transmission member, and a second cam member coupled to the drive transmission member via said first cam member as said movable portion The drive device according to claim 1 , further comprising: a first movable part that follows the first cam body; and a second movable part that follows the second cam body . Tapered surfaces that are inclined at a predetermined angle with respect to the shaft are respectively provided at opposite portions of the first cam body and the second cam body, and the first cam body and the second cam body are provided with the tapered surface. The drive device according to claim 2, wherein the two are connected by abutting each other . A housing having the movable portion mounted thereon, wherein the motor, the shaft, the drive transmission member, the cam body, and the elastic body are disposed inside the housing, and the movable portion is disposed outside the housing. The drive device according to claim 1 , wherein the drive device projects . A timepiece comprising the driving device according to claim 1.

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