JP3012754U - Swing mechanism of music box - Google Patents

Abstract

(57) [Abstract] [Purpose] In a music box equipped with a swing arm for driving a movable body such as the head of a doll, it is easy to attach the swing arm and the pivot member that pivotally supports the swing arm. Therefore, the manufacturing cost can be reduced, and the shaft support structure with a high degree of freedom in designing the drive system is realized. [Structure] The diaphragm 5 is fixed onto the base 1 by two fixing screws 51 and 52. The shaft support member 10 is fixed to the fixing screw 51 on the fixing portion of the diaphragm. A shaft supporting groove having an opening is formed in the shaft supporting member 10 below, and a swing shaft 20 is supported between the shaft supporting groove and the surface of the fixed portion of the diaphragm 5. The swing shaft 20 has a bent retaining end portion 21.
And a driven portion 22 that comes into contact with the cam plate 9 and a drive portion 23 that rises upward. The retaining end 21 of the swing shaft 20 contacts the head of the fixing screw 52 to position the swing shaft 20 in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a swing mechanism of a music box, and more particularly to a structure suitable for providing a drive system of a movable body configured to move a doll and other toys together with the sound of the music box.

[0002]

[Prior art]

 Conventionally, there is a music box in which a doll or other toy is attached so that the toy moves along with the sound of the music box. A music box mechanism with a moving shaft is used. The swing shaft is adapted to move a movable body such as a doll.

As shown in FIG. 3, this music box movement has a mainspring mechanism 2, a speed adjusting mechanism 3 for adjusting the rotation speed of the mainspring mechanism 2, and a large number of engaging pins on the peripheral surface, as shown in FIG. A rotary drum 4 in which is embedded and a vibration plate 5 fixed to the side of the rotary drum 4 are arranged. The rotary drum 4 is rotated at a constant speed by the mainspring mechanism 2 and the speed adjusting mechanism 3, and the engaging pin makes a sound by flipping the lead of the diaphragm 5.

A shaft support member 6 is fixed on the frame on the outer edge side of the rotary drum 4. Both front and rear ends of the shaft supporting member 6 are bent upward to form a shaft supporting portion 6a having a shaft hole. The swing shaft 7 is inserted through the shaft support 6a, and the rear end of the swing shaft 7 is a retaining end 7a bent at a right angle. The swing shaft 7 extends forward and then bends upward, becomes horizontal again to form a driven portion 7b, and further bends and then extends upward to form a driving portion 7c. A torsion spring 8 is wound around the swing shaft 7, and the torsion spring 8 urges the swing shaft 7 counterclockwise.

A cam plate 9 connected to the rotary shaft of the rotary drum 4 is arranged on the front end side of the rotary drum 4. A large number of cam teeth 9a are formed on the outer peripheral portion of the cam plate 9, and the driven portion 7b of the swing shaft 7 is engaged with the cam teeth 9a. Since the elastic force of the torsion spring 8 constantly presses the driven portion 7b against the cam plate 9, the drive portion 7c of the swing shaft 7 repeats the swinging movement to the left and right.

[0006]

[Problems to be solved by the device]

 In the above-mentioned conventional music box movement, since the shaft supporting member 6 is mounted in the empty space of the frame 1, there are restrictions on the arrangement of the swing shaft 7, which may hinder the drive design of the movable body. Further, since the shaft support member 6 is fixed to the frame 1 by caulking, it cannot be easily attached at the final stage of the music box product (decoration process, etc.), which improves the efficiency of the manufacturing process of the product configuration. There is a problem that it is bad and it is difficult to change the design.

On the other hand, since the swing shaft 7 is adapted to be inserted into the shaft hole formed in the shaft support portion 6 a of the shaft support member 6, after the swing shaft 7 is inserted into the shaft support member 6, the swing shaft 7 is desired. It becomes necessary to bend the structure, which complicates the processing work and increases the manufacturing cost. Moreover, according to this configuration, since it is not possible to use a thick and highly rigid shaft material as the swing shaft, the strength of the swing shaft cannot be secured and the diameter of the swing shaft cannot be adjusted, so that the swing shaft cannot be adjusted. There is also a problem that the types of members that can be connected to the shaft and the types of movable bodies that can be driven are limited.

Therefore, the present invention solves the above-mentioned problems, and it is an object of the present invention to easily attach the shaft support member and the swing shaft, reduce the manufacturing cost, and design the drive system. The purpose is to obtain a pivotal support structure for a swinging shaft that is highly prone.

[0009]

[Means for Solving the Problems]

 The present invention includes a rotary drive source, a rotary drum that is rotated by the rotary drive source, and a vibration plate that is repelled by an engagement pin that is planted in the rotary drum. In a music box with a mechanically driven swing arm, a pivot member mounted on the fixed portion of the diaphragm is provided, and the swing arm can be introduced on the side facing the surface of the fixed portion. The swing arm is axially supported between the shaft support groove and the fixed portion in a state of being accommodated in the shaft support groove.

Here, the shaft support member is fixed on the fixed portion by a fixing screw, and the shaft support member is formed to have a size such that a fixing screw can be inserted thereinto, and the fixing screw can be introduced from the side. It is preferable to provide a notch portion provided with.

Further, it is preferable that the fixing screw is a fixing screw for fixing the diaphragm to the frame of the music box.

Further, the diaphragm is fixed to the frame of the music box by two fixing screws, the shaft supporting member is fixed by one fixing screw, and the swing arm is positioned by using the head of the other fixing screw as a thrust bearing. Is preferred.

In this case, the swinging arm may be provided with a retaining end that is bent and extends from the shaft supporting groove, and the retaining end may be brought into contact with the head of the other fixing screw. desirable.

It is preferable to provide a cam member that rotates together with the rotary drum, and bring the swing arm into contact with the cam member from above.

[0015]

[Action]

 According to the first aspect, when the swing arm is housed in the shaft support groove formed in the shaft support member and the shaft support member is mounted on the fixed portion of the diaphragm, the swing arm includes the shaft support groove and the fixed portion. Since it is pivotally supported between the two, the swing arm can be attached very easily. Further, since the swing arm can be introduced from the opening of the shaft support groove, it is possible to support the shaft support member after the shape of the swing arm is formed in advance. Further, by disposing the shaft support member on the fixed portion of the diaphragm, the swing stroke of the swing arm can be sufficiently secured without increasing the projected area of the music box.

According to the second aspect of the present invention, the shaft support member is provided with the cutout portion having the opening into which the fixing screw can be introduced from the side. Therefore, by introducing the fixing screw from the opening of the cutout portion, Since the shaft support member can be inserted from the one side and fixed on the diaphragm, the work of attaching the swing arm is further facilitated.

According to the third aspect, by using the fixing screw for fixing the shaft supporting member as the fixing screw for fixing the vibration plate, the shaft supporting member can be attached very easily and the number of parts does not increase. It is not necessary to perform processing such as caulking.

According to the fourth aspect, by fixing the shaft support member with one fixing screw and using the other fixing screw as the thrust bearing for the rocking arm, the rocking arm can be reliably supported with a simple structure. It will be possible.

According to the fifth aspect, the rocking arm is provided with the retaining end, and the retaining end is brought into contact with the head of the other fixing screw, so that the number of parts is not increased and the shaft support is prevented. The swing arm can be reliably positioned in the axial direction without complicating the structure.

According to the sixth and eighth aspects, since the driven portion of the swing arm is brought into contact with the cam member from above, the contact of the swing arm with the cam member is maintained by its own weight. No separate component is needed to maintain this contact.

According to the seventh aspect of the present invention, the mounting of the shaft supporting member is facilitated, and the swing arm pivotally supported by the shaft supporting member is securely supported without complicating the mounting work and the shaft supporting structure. can do.

[0022]

【Example】

 Next, an embodiment of the music box according to the present invention will be described. The structure of this embodiment is shown in FIG. The diaphragm 5 is fixed on the frame 1 by two fixing screws 51 and 52, and the shaft support member 10 is fixed on the diaphragm 5 by the fixing screws 51. The pivot member 10 pivotally supports the swing shaft 20 with the diaphragm 5. The swing shaft 20 has a retaining end 21 formed by bending the end, a driven portion 22 formed forwardly extending forward and bent in a U shape, and further upward from the driven portion 22. The drive unit 23 is formed by bending.

The driven portion 22 of the swing shaft 20 contacts the cam plate 9 connected to the rotary drum 4, and performs a swing motion according to the shape of the cam teeth 9 a according to the rotation of the cam plate 9. In this embodiment, since the shaft support member 10 is arranged on the fixed portion of the vibration plate 5, the swing shaft 20 can be easily handled, and the driven portion 22 of the swing shaft 20 is placed above the cam plate 9. It is possible to make contact with each other. Therefore, the swing shaft 20 is in contact with the cam plate 9 by its own weight, and it is not necessary to urge it with a component such as a spring to maintain this contact state, so that the attachment of the component is unnecessary. The manufacturing cost can be reduced. Here, the swing shaft 20 is axially supported by the shaft support member 10 in the axial direction thereof, but in the thrust direction, the bent shape of the retaining end 21 and the retaining end 21 and the fixing screw 52 contact each other. It is positioned and fixed by contact.

FIG. 2A shows the shape of the shaft support member in detail. The shaft support member 10 is formed by pressing a metallic plate-like material, and includes a bottom plate portion 11 and a pair of side plate portions 12 and 12 that are erected by being bent on both sides of the bottom plate portion 11. Consists of. The bottom plate portion 11 is formed with an insertion hole 11a at the center thereof through which the fixing screw 51 can be inserted. The side plate portion 12 is formed with an inverted U-shaped shaft support groove 12a at a portion projecting outward from the bottom plate part 11, and a rectangular shape is formed between the shaft support groove 12a and the bottom plate part 11. The cutout 12b is formed. The notch portion 12b facilitates the molding of the side plate portion 12 of the shaft supporting member 10 and prevents the peripheral portion of the shaft supporting groove 12a from being deformed during the molding.

The shaft support groove 12 a has an opening that allows the swing shaft 20 to be introduced into the shaft support groove 12 a from below, and when the shaft support member 10 is fixed on the diaphragm 5, the shaft support groove 12 a The oscillating shaft 20 is positioned between the opening of the shaft support groove 12a and the surface of the diaphragm 5 facing the opening. Since the shaft support groove 12a is not a conventional shaft hole but has a groove shape having an opening, it is extremely easy to introduce the swing shaft 20 from the opening of the shaft support groove and fix the shaft support member 10. Can be assembled into Further, since the swing shaft that has been bent and formed in advance can be mounted as it is, there is no need to bend the swing shaft after the swing shaft is pivotally supported. Therefore, the manufacturing process can be simplified and the swing shaft can be thicker or thicker. It is also possible to use a shaft material having high rigidity.

FIG. 2B shows a modified example of the shaft support member 10. The shaft support member 30 is composed of a bottom plate portion 31 and side plate portions 32 and 32 provided upright on both sides of the bottom plate portion 31, respectively. A shaft support groove (not shown) similar to the shaft support groove 12a is formed in the side plate portion 32. The bottom plate portion 31 is formed with a notch groove 31a that opens toward the opposite side of the shaft support groove, and the fixing screw 51 is inserted through the notch groove 31a. In this modified example, the notch groove 31a is formed instead of the insertion hole 11a, so that the fixing screw 51 can be slightly loosened and the shaft support member 30 can be inserted from the side, and the mounting work can be further facilitated. It will be easier. For example, by simply sliding the bottom plate 31 under the head of the fixing screw 51 that is loosened with the swing shaft 20 housed in the shaft support groove, and then fastening the fixing screw 51, the installation is completed very easily. To do.

In this embodiment, a plate-shaped member is used as the shaft supporting member, and the shaft supporting groove is formed at two places by press working. However, the block supporting member is formed in the axial direction. A shaft support groove may be formed to extend. Further, the swinging shaft is not limited to the shaft-shaped member, and any swinging member can be attached as long as it has a shaft-supported portion corresponding to the shaft-supporting groove. The swing shaft is structured to swing following the cam plate, but not limited to the cam, an arbitrary drive system such as a link or a crank shaft can be used. Further, although the case where the cam plate is connected to one end of the rotary drum is shown, the rotational force may be taken out through a gear provided at the end portion of the rotary drum near the mainspring mechanism. And the structure is arbitrary.

[0028]

[Effect of device]

 As described above, according to the present invention, when the swing arm is housed in the shaft support groove formed in the shaft support member and the shaft support member is mounted on the fixed portion of the diaphragm, the swing arm is fixed to the shaft support groove. The swing arm can be attached very easily because it is pivotally supported between the arm and the part. Further, since the swing arm can be introduced from the opening of the shaft support groove, it is possible to support the shaft support member after the shape of the swing arm is formed in advance, and further the shaft support member is fixed to the diaphragm. By arranging it above, the swing stroke of the swing arm can be sufficiently secured without increasing the projected area of the music box, so the shape, diameter, rigidity, etc. of the swing arm can be designed arbitrarily. Therefore, the degree of freedom in designing the drive system can be significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view (a) showing an embodiment of a music box according to the present invention and a schematic front view (b) showing the same embodiment.

FIG. 2 is a side view and a plan view (a) showing a structure of a shaft supporting member in the embodiment, and a plan view (b) showing a modified example of the coaxial supporting member.

FIG. 3 is a plan view (a) showing the structure of a conventional music box;
It is a schematic front view (b) which shows the same music box.

[Explanation of symbols]

 1 frame 2 spring mechanism 3 speed control mechanism 4 rotary drum 5 diaphragm 9 cam plate 10, 30 shaft support member 12a shaft support groove 12b cutout 20 swing shaft 21 retaining end 31a cutout groove 51, 52 fixing screw

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[Procedure amendment]

[Submission date] November 25, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

Claims (8)

[Scope of utility model registration request] 1. A rotary drive source, a rotary drum which is rotated by the rotary drive source, and a vibration plate which is repelled by an engagement pin embedded in the rotary drum. The rotary drive source directly or by a rotational force of the rotary drive source. In a rocking mechanism of a music box provided with a rocking arm that is indirectly driven, a rocking member mounted on a fixed portion of the diaphragm,
The shaft support member is provided with a shaft support groove having an opening into which the swing arm can be introduced, on a side facing the surface of the fixed portion, and the swing arm is accommodated in the shaft support groove. A rocking mechanism of a music box, wherein the rocking mechanism is axially supported between the shaft supporting groove and the fixing portion. 2. The shaft support member according to claim 1, wherein the shaft support member is fixed to the fixing portion by a fixing screw, is formed to have a size such that the fixing screw can be inserted, and the fixing screw is laterally attached. A swinging mechanism of a music box, which has a notch portion having an opening that can be introduced. 3. The swing mechanism of the music box according to claim 1, wherein the fixing screw is a fixing screw for fixing the diaphragm to the frame of the music box. 4. The vibrating plate according to claim 1, which is fixed to the frame of the music box by two fixing screws, the shaft support member is fixed by one of the fixing screws, and the swing arm is the other of the two. A rocking mechanism for a music box, wherein the head of a fixing screw is positioned as a thrust bearing. 5. The swing arm according to claim 4, wherein the swing arm has a retaining end formed in a bent shape so as to extend from the shaft supporting groove.
The swing mechanism of the music box, wherein the retaining end is in contact with the head of the other fixing screw. 6. The swing mechanism for a music box according to claim 1, further comprising a cam member that rotates together with the rotary drum, wherein the swing arm is in contact with the cam member from above. . 7. The vibration plate according to claim 2, wherein the diaphragm is fixed to the frame of the music box by two fixing screws, the shaft support member is fixed by one fixing screw, and the swing arm is the other one. A rocking mechanism for a music box, wherein the head of a fixing screw is positioned as a thrust bearing. 8. The swing mechanism for a music box according to claim 5, further comprising a cam member that rotates together with the rotary drum, and the swing arm is in contact with the cam member from above. .