JP2989753B2 - Music box performance unit and music box with the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music box playing unit and a music box provided with the same, and more particularly to a music box comprising a rotating drum and a diaphragm which can be attached to a plurality of types of driving bodies. Related to the new structure.

[0002]

2. Description of the Related Art Conventionally, a music box has a playing section composed of a rotating drum and a diaphragm, a driving section including a full-pitch driving source, an electric motor, and the like, and rotation is transmitted from the driving section to the playing section. Some have various structures composed of a transmission gear train. However, in recent years, in order to reduce the cost of the movement, only the playing section is independently configured as a playing section unit, and a plurality of drivers are configured to be attachable, and the drivers are appropriately attached to this playing section unit. There is an attempt to complete the movement of the music box.

In such a case, since various drive sources can be used in a common performance unit, it is possible to share parts and manufacturing processes even when a large number of specifications must be satisfied. Therefore, the manufacturing cost can be reduced. In addition, there is an advantage that it is possible to easily cope with a case where only the performance unit is supplied and incorporated into a toy or the like at the destination.

FIG. 5 shows a motor-driven music box provided with the above-mentioned performance unit. The music box includes a frame 1, a rotating drum 3 mounted on the frame 1 via a shaft support 2, and a rotating drum 3.
And a vibration plate 4 arranged so as to be able to engage with an engaging pin implanted on the peripheral surface of the musical instrument. A mounting plate 5 is fixed by caulking to the side surfaces of the rotary drum 3 and the vibration plate 4 of the playing section unit, and a shaft end of the mounting plate 5 opposite to the shaft support 2 of the rotary drum 3 is mounted on a rising portion 51 of the mounting plate 5. Is supported. An electric motor 6 and transmission gear trains 7, 8, 9, 10, 11 are mounted on the mounting plate 5.

A second gear 8 formed on a first gear shaft supported by a mounting plate 5 meshes with a worm shaft 7 fixed to an output shaft of an electric motor 6, and a shaft end of the first gear shaft. The third gear 9 formed on the second gear shaft meshes with the fourth gear 10 formed on the second gear shaft supported by the mounting plate, and the fifth gear 11 formed on the shaft end of the second gear shaft rotates. It meshes with a large-diameter gear 31 formed on the end plate of the drum 3. The leaf spring 32 presses the rotary drum 3 against the shaft support 2 with a predetermined elastic force, and applies a predetermined rotation resistance to the rotary drum 3.

[0006]

However, in the above-mentioned conventional music box, in order to be able to mount various driving bodies, the entire playing section unit is not completely independent as shown in FIG. Shaft support 2 of rotating drum 3
It is necessary to improve the responsiveness by providing a shaft support opposite to that on the mounting plate 5 side or the like. For this reason, when assembling the music box, the rotary drum 3 is fixed for the first time after the mounting plate 5 has been mounted, so that the performance section unit itself cannot be manufactured independently, and it is difficult to store it as a semi-finished product. The cost could not be reduced sufficiently.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a music box structure which has an independent structure of a playing section unit and which can be applied to various driving bodies. Is to do.

[0008]

Means taken by the present invention to solve the above-mentioned problems include a frame, a rotary drum rotatably supported on the frame and having an engaging pin implanted on the peripheral surface. And a diaphragm fixed on the frame adjacent to the rotating drum and arranged to engage with an engaging pin of the rotating drum. A first and a second shaft supporting portions for supporting both shaft portions of the drum, and a driving body mounting portion disposed on the installation side of the second shaft supporting portion;
An interval is provided between the second shaft support portion and the end plate of the rotary drum, and an engagement structure capable of transmitting a driving force is provided on the end plate ,
Various types of driving the rotary drum are provided on the driving body mounting portion.
Select from the driver or transmission mechanism of
The drive or transmission mechanism configured for
Screw holes for attachment, and the driving body or transmission
There is a positioning boss for positioning the mechanism
Music box performance unit
You. A frame, a rotating drum rotatably supported on the frame, and an engaging pin implanted on a peripheral surface thereof; and an engaging pin of the rotating drum fixed on the frame adjacent to the rotating drum. And a diaphragm arranged so as to engage with the music box.
And a second pivot portion, and the second pivot portion is disposed on the installation side of the second pivot portion.
Provided with a driving member mounting portion that, the spaced between the second shaft support and the rotary drum end plate, a transfer engagement structure of the driving force provided to the end plate, the drive Body mounting
The part includes various driving members or driving members for driving the rotating drum.
Is configured to select and install from among the transmission mechanisms
For mounting the driver or transmission mechanism
Position the screw holes and the drive or transmission mechanism
It is characterized by having a positioning hole for
This is the music unit of the music box.

In this case, the engagement structure may be a gear structure in which teeth are formed on the outer periphery.

The engaging structure may be a tooth structure formed on an end face of the end plate and capable of engaging with a claw.

As a music box having a driving body, a mounting plate is fixed to the driving body mounting portion of the playing section unit,
It is preferable that an electric motor is mounted on the mounting plate, and the output of the electric motor is transmitted to the end plate via a transmission gear train that is supported by the mounting plate.

In this case, it is preferable that the electric motor is disposed outside the second shaft support, and an output shaft of the electric motor is provided on the side where the diaphragm is installed.

In addition, a gear shaft located in the middle of the transmission gear train is disposed above the front and rear gears, and at least one of a pair of mounting shaft support portions of the mounting plate that supports the gear shaft. It is desirable to provide an inclined guide surface formed outward from the mounting shaft support on the inner peripheral surface.

As another music box, a mounting plate is fixed to the driving body mounting portion of the playing section unit, and is engaged in a rotational direction with respect to the ratchet between the end plate and the second shaft supporting portion. A rotating gear with a claw that comes off is rotatably mounted,
It is preferable that a worm shaft that meshes with the rotating gear is mounted on the mounting plate.

Further, as another music box, it is preferable to provide a push lever which is provided on the driving body mounting portion of the playing section unit and has a claw which is engaged with and disengaged from the engagement structure in a rotational direction. .

[0016]

According to the first aspect, since the shafts at both ends of the rotary drum are supported by the first and second support portions, the rotary drum can be fixed in the performance section unit. Can be manufactured and stored independently,
Since the space is provided between the second shaft support portion and the end plate, the degree of freedom in designing a structure for transmitting the driving force generated by the driving body to the driving body mounting section to the end plate can be increased. Various driving bodies can be supported.

In the case where the gear structure according to the second aspect and the engagement structure according to the third aspect are provided on the end plate, the arrangement of the member that engages with the end plate by the space between the end plate and the second shaft support portion. The degree of freedom of design such as shape and shape is increased, and a large number of driving bodies can be attached.

According to the fourth aspect, when the electric motor is mounted via the mounting plate, the electric gear train can be appropriately disposed on the mounting plate to transmit the rotation to the end plate. In this case, since a space is provided between the end plate and the shaft support portion, a sufficient space for disposing a gear engaged with the end plate or a gear located on the end face side of the end plate in the transmission gear train is provided. As a result, the gear train can be freely designed, and the playing unit can be adapted to various models.

According to the fifth aspect, by disposing the output shaft of the electric motor on the installation side of the diaphragm, the distance along the installation area of the diaphragm exists in the frame, so that the transmission gear train can be handled. It becomes easy, and it becomes possible to arrange the transmission gear train in the frame of the performance unit,
Accidents such as gear breakage due to impact can be prevented.

According to the sixth aspect, the inclined guide surface is provided on the inner surface side of the mounting shaft support portion of the mounting plate, so that the end of the gear shaft is brought into contact with the inclined guide surface at the end of the assembly of the transmission gear train. Since the front and rear gears can be meshed from above only by sliding toward the mounting shaft support, the transmission gear can be assembled very easily. In this case, by assembling the gear shaft in the middle of the transmission gear train last, it is possible to safely and easily assemble the transmission gear train by avoiding damage to the playing part due to reversal of the rotating drum and damage to the gear caused by stress. Can be.

According to the seventh aspect, the rotating gear rotatably attached to the shaft end of the rotating drum is engaged with the worm shaft, whereby the rotating gear is rotated by the rotation of the worm shaft, and the claw of the rotating gear is used to rotate the rotating gear. The end plate is driven to rotate in one direction, and the pawl is disengaged in the opposite direction so that rotation is not transmitted.
In this case, since an interval is provided between the end plate and the shaft support portion, a sufficient arrangement space for configuring the ratchet mechanism by the engagement structure of the end plate and the rotary gear having the claw can be taken, and the reverse rotation can be achieved. While enabling the rotation of the rotating drum that was prevented,
Compatible with many models with various drive units.

According to the eighth aspect, the end plate is rotated in one direction by operating the push lever by fixing the push lever provided with the pawl which is disengaged from the engagement structure in the rotation direction. Can be. In this case, a space is provided between the end plate and the shaft support portion, so that the engagement structure of the end plate and the pawl of the push lever can provide a sufficient arrangement space for configuring the ratchet mechanism, and prevent reverse rotation. While being able to drive the rotating drum, it is possible to cope with many models having various driving units.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a music box performance unit according to the present invention will be described. FIG. 1 shows the overall configuration of the performance unit. A rotary drum 3 is rotatably supported on the frame 1 via shaft supports 2 and 12.
The diaphragm 4 is screwed so as to engage with an engagement pin implanted on the peripheral surface of the diaphragm 4. In the shaft support 2, one shaft end 33 of the rotating drum 3 is fixed by crimping.

The shaft end 33 is provided with a thread on its outer periphery, and is fixed in the axial direction at a portion fixed to the shaft support 2 by caulking, and the end face of the shaft end 33 is provided with an end hole 3.
3a is formed, and by inserting a tool (not shown) in the shape of a pyramid at the tip into the end hole 33a, the shaft end 33 can be rotated with respect to the shaft supporting portion 2, and the rotating drum 3 is moved along the axis. It can be moved in any direction.
On the other hand, the shaft end 34 of the rotating drum 3 has a predetermined length (for example, 4
6 mm), and the tip is rotatably supported by a shaft support 12 protruding from above the frame 1.

A large-diameter gear 31 formed integrally with the end plate is attached and fixed to the end of the rotary drum 3 on the shaft support 12 side. As shown in FIG. 1B, a ring-shaped ratchet engaging surface 31a is formed on an end surface of the large-diameter gear 31 so that the rotary drum 3 rotates by engaging with a predetermined claw. ing. A space corresponding to the length is formed between the end surface of the large-diameter gear 31 and the shaft support 12 by the shaft end 34 having the predetermined length. The ratchet engaging surface can take various structures, and may be used as a simple gear depending on the structure of the driving body. If the connection structures of the driving body all correspond to this engagement surface, the teeth engraved on the outer periphery of the large-diameter gear are unnecessary, and conversely, all the connection structures of the driving body correspond to the outer peripheral teeth. If so,
The ratchet engaging surface 31a is unnecessary.

The front side of the rotary drum 3 and the diaphragm 4 on the frame 1, that is, the surface on the side of the shaft support portion 12 is formed in a substantially planar shape and is set as a driving body mounting portion A. The driving body mounting portion A is provided with screw holes 13, 14 and 15, a positioning boss 16 having a conical tip, and a positioning hole 17 having a conical bottom surface. These are provided for mounting various driving bodies (including transmission mechanisms), and fix at least one of the screw holes, bosses, and holes depending on the type, shape, structure, etc. of the driving body. To be used.

FIG. 2 shows a case in which an electric motor is mounted on the above-mentioned performance unit to form a motor-driven music box. The mounting plate 5 is mounted and fixed on the driving body mounting portion A of the frame 1 via fixing screws 56 and 57 screwed into the screw holes 13 and 14. The mounting plate 5 is formed by pressing a single metal plate, and is provided with rising portions 52, 53, 54, and 55 formed by bending upward.
At the upper end of the rising portion 54, an inclined guide portion 54a is formed which extends to the right and is inclined to open outward.

A rear portion of the electric motor 6 is fixed to the rising portion 52, and external terminals 61 and 62 of the electric motor 6 penetrate a wiring board 71 fixed to the rising portion 52 and are formed on the wiring board 71. Conductively connected to the electrode pattern. Worm shaft 6 fixed to the output shaft of electric motor 6
The first gear 1 meshes with a second gear 62a formed on a first gear shaft 62 supported by the rising portions 53 and 54 of the mounting plate 5. Third gear 6 formed on the other shaft end of first gear shaft 62
2b is a second shaft supported by the rising portions 53 and 55 of the mounting plate.
It is in mesh with a fourth gear 63 a formed on the gear shaft 63. Fifth gear 63b formed on the shaft of second gear shaft 63
Meshes with the large-diameter gear 31.

As can be seen from FIG. 2, the playing section unit is configured such that an electric motor 6 fixed to the mounting plate 5 and transmission gear mechanisms 61, 62, 63 can be mounted on the driving body mounting section A. However, since the rotating drum 3 is completely mounted on the frame 1 by the shaft supports 2 and 12, the playing section unit is completed and independent.
Since independent assembly is possible only with the unit and management and storage can be performed by the unit itself, the manufacturing process can be simplified even in a line for small-lot production of many models.

Since a space is provided between the large-diameter gear 31 attached to the end face of the rotary drum 3 and the shaft support portion 12, as shown in FIG. Another gear (fourth gear 63a) can be provided, which facilitates the operation of the transmission gear mechanism. This means that the degree of freedom in the design of the gear mechanism is increased, so that the volume of the transmission gear train can be reduced, and this has a great effect in reducing the size of the music box.

In the performance unit shown in FIGS. 1 and 2, a thread is formed on the outer periphery of the shaft end 33 of the rotary drum 3 and an end hole 33a is formed in the end surface of the shaft end 33.
Is inserted, a tool is inserted into this end hole 33a to apply an axial stress, and the rotating drum 3 is rotated to move the rotating drum 3 in the axial direction. The mounting pressure in the direction can be adjusted. Therefore, the rotation resistance of the rotary drum 3 can be appropriately adjusted in order to prevent the occurrence of noise due to the backlash of the gears, and the rotary drum 3 needs to be pressed in the axial direction by a leaf spring as shown in FIG. And cost can be reduced by reducing the number of parts and the number of assembly steps.

The transmission gear mechanism includes a first gear shaft 62 extending from the output shaft of the electric motor 6 to the playing section unit.
The fourth gear 63 is disposed above the worm shaft 61.
Since the first gear shaft 62 is set so as to engage from obliquely above, the first gear shaft 62 can be attached last and assembled. Conventionally, when assembling the transmission gear mechanism, the fifth
The reverse rotation of the rotating drum 3 caused by the shift of the engagement with the large-diameter gear 31 when the gear 63b is finally connected often causes damage to the engaging pin or the lead of the diaphragm. According to the present embodiment, after attaching the second gear shaft 63, finally, the first gear shaft 62 is attached from above with meshing engagement with the fourth gear 63a, and finally attached to the worm shaft 61. This can be avoided by meshing.

In this case, since the inclined guide portion 54a is formed so as to be bent so as to spread outward at the rising portion 54 of the mounting plate 5, the end of the first gear shaft 62 on the third gear 62b side is connected. First, the first gear shaft 62 is supported by the rising portion 53, and the third gear 62b and the fourth gear 63a are engaged with each other first.
Of the second gear 62a is pushed inward while making contact with the inner inclined surface of the inclined guide portion 54a.
The worm shaft 61 and the second gear 62a can be meshed with each other by meshing with the gear 1.

In this embodiment, since the transmission gear mechanism transmits the rotation at a reduced speed, the output side (rotary drum side) does not rotate when the first gear shaft 62 is mounted, but the input side (electric motor). Since the worm shaft 61 is engaged with the second gear 62a connected to the output side, the rotary drum 3 and the diaphragm 4 are not damaged.

Further, since the first gear shaft 62 is located on the upper side with respect to the other parts and is configured to mesh from the upper side, even if the third gear 62b, which requires particularly high accuracy, is defective, it can be easily operated. The transmission gear mechanism can be replaced easily, and no extra labor is required for assembling the transmission gear mechanism, and the meshing can be easily performed. Therefore, it is possible to prevent the gears from being damaged at the time of assembling the transmission gear mechanism.

Generally, in order to adjust the volume of the music box or the like, the distance between the engaging pin of the rotary drum 3 and the lead of the diaphragm 4 is adjusted (meshing adjustment) after assembling. Are located outside the left and right sides of the frame 1 (when viewed from the viewpoints of FIGS. 1A and 2B, the same applies hereinafter), so that the connection of the power supply line is facilitated. I have.

The output shaft of the electric motor 6, the worm shaft 61 connected thereto, and the entire transmission gear mechanism
Are arranged inside the left and right sides of the gear box, so that even if the music box movement is accidentally dropped, it is difficult for external force to be applied to the gear train, and the possibility of damage is reduced. The reason why the electric motor 6 and the transmission gear mechanism can all be accommodated in the range of the left and right side surfaces of the frame as described above is that the output shaft of the electric motor 6 is arranged on the side surface of the diaphragm 4, contrary to the related art. That is, a transmission gear train is arranged from the output shaft of the electric motor 6 (the shaft to which the worm shaft 61 is fixed) with respect to the large-diameter gear 31 of the rotary drum 3. This is because there is a space corresponding to the length in the left-right direction of FIG.

In the mounting plate 5, the rising portion 54
Of the transmission gear train, the uppermost first gear shaft 62 of the transmission gear train is protected by the inclination guide portion 54a. Thus, the possibility of damage to the gear train due to direct contact with an external object is reduced.

Next, with reference to FIGS. 3 and 4, an example in which another driving body is mounted on the above-mentioned performance unit will be described. FIG. 3 shows a structure suitable for a case where a crank-shaped drive shaft 80 is mounted and driven manually or a case where a turning motion is used as a drive source. A grip 81 rotatably attached to the drive shaft 80 is provided at an outer end of the drive shaft 80, and a worm shaft 82 engraved on the peripheral surface is formed on the opposite side. . The drive shaft 80 is rotatably supported by a resin-made bearing member 83 which is fixedly mounted to the driving body mounting portion A of the frame 1 via fixing screws 84 and 85.

A ratchet gear 86 is rotatably mounted on the shaft end 34 between the large-diameter gear 31 and the shaft support 12 provided at the end of the rotary drum 3. As shown in FIG. 3B, the ratchet gear 86 is provided with a ratchet wheel portion 86a on the rotary drum 3 side, and the shaft support portion 1 on the opposite side.
A gear 86b is provided on the second side. The worm shaft portion 82 of the drive shaft 80 meshes with the gear portion 86b from above. The ratchet wheel portion 86a is formed in a shape having two rotational symmetries, and the two ratchet portions 86a-
1,86a-2 are formed. This claw portion 86a-
1, 86a-2 are engaged with the ratchet engaging surface 31a of the large-diameter gear 31, respectively.

The ratchet engaging surface 31a formed on the end surface of the large-diameter gear 31 and the two claws of the ratchet gear 86 engaging with the ratchet engaging surface 31a constitute a so-called ratchet mechanism. It functions as a one-way clutch that transmits only. Although not shown, the drive shaft 80, the ratchet gear 86, and the shaft support portion 12 are completely covered on the outer edge side of the frame 1 by the bearing member 83, and furthermore, the bearing member 83 is formed by a top plate (not shown). The upper part is also closed.

In this embodiment, the worm shaft 8 is rotated by rotating the gripper 81 to rotate the drive shaft 80.
2, gear portion 86b, ratchet wheel portion 86a, ratchet engaging surface 3
The rotary drum 3 is driven to rotate via 1a. Here, when rotating the drive shaft 80 in the reverse direction, the rotation transmission between the ratchet gear 86 and the ratchet engaging surface 31a is released, and the pawl portions 86a-1 and 86a-2 idle on the ratchet engaging surface 31a. Therefore, the reverse rotation of the rotating drum 3 does not occur, and the rotating drum 3 and the diaphragm 4 are prevented from being damaged.

According to this embodiment, the manual drive shaft 80 is easily mounted and driven simply by engaging the ratchet gear 86 with the shaft end 34 of the rotary drum 3 formed at a predetermined interval. It is not necessary to change the original structure of the performance unit.

FIG. 4 shows a music box in which a push lever 90 is attached to the performance unit. The push lever 90 is formed of a thin metal plate having a spring property, and has an operating portion 91 that causes the lever to be deformed by being pressed down, and a fixing screw 9 on the driving body mounting portion A of the frame 1.
A joint surface portion 92 is fixed via the joints 5 and 96, and spring pieces 93 and 94 rising upward from the joint surface portion 92.

The spring piece 93 protrudes upward from the joint surface 92, is curved in an arm shape, and has a claw 93a at its tip. On the other hand, the spring piece portion 94 also protrudes upward from the joint surface portion 92, is curved in an arm shape, is connected to the grip portion 91, and has a claw portion 94a that protrudes downward from the lower edge and slightly toward the rotary drum 3 in the middle thereof. . These claw portions 93a and claw portions 9
4a are engaged with the ratchet engagement surface 31a of the large diameter gear 31, respectively.

When the operating section 91 is pushed down manually or by another mechanism, the spring piece 94 is deformed downward,
The claw 94a (click) at the tip rotates the large-diameter gear 31 in the forward direction by one tooth formed on the ratchet engaging surface 31a, and when the claw 94a has finished feeding the large-diameter gear 31. The claw portion 93a (pole) completely engages with the teeth formed on the ratchet engaging surface 31a at the upper side. At this time, when the force applied to the operation portion 91 is released, the spring piece portion 94 returns upward, and the claw portions 94a
Also slides on the ratchet engaging surface 31a and returns upward.
At this time, the pawl portion 93a firmly engages with the ratchet engaging surface 31a to prevent the large diameter gear 31 from rotating in the reverse direction.

As described above, the push lever 90 pushes the ratchet engaging surface 3
The rotating drum 3 is rotated by one tooth 1a, and the music box is played one sound at a time.

Also in this embodiment, a music box including a driving body can be easily completed simply by attaching the push lever 90 to the playing section unit as it is. Since the push lever 90 has a thin plate shape, it requires little installation space. However, even if the push lever 90 has a thick plate shape, the space between the large-diameter gear 31 and the shaft support portion 12 is sufficiently large, so that the push lever 90 is not required for mounting. It can be seen that there is no hindrance, and that levers of various shapes can be attached.

As described above, in each of the above embodiments,
Since the rotary drum 3 is completely fixed by providing the shaft support portion 12 on the frame 1, the playing section unit, which only had a significance as a part of the conventional completed music box, is configured as a complete one part. As a result, the handling unit as a semi-finished product is extremely easy to handle, and application to various driving bodies is also facilitated, so that many models can be developed with a common playing unit. In addition, compatibility between models is possible, and standardized design is facilitated.

In the above embodiment, since the ratchet engaging surface 31a is provided on the end surface of the large diameter gear 31, the ratchet component can be engaged as it is, and the mounting of the driving components such as the manual handle and the push lever is easy. become. In addition, as a connection structure between the driving body and the performance unit, the same operation as that of the ratchet mechanism can be constituted by a one-way clutch using a coil spring or the like.
The end surface structure of the large-diameter gear 31 is not limited to the ratchet engagement surface, but may be any engagement structure.

Since the large-diameter gear and the shaft support are formed with a space therebetween, various driving / transmission mechanisms such as a transmission gear, a ratchet gear, and a push lever can be easily arranged in the gap. The degree of freedom in mounting or transmitting the driving force is secured, and the compatibility with multiple models and the ease of assembly are improved.

[0052]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect, since the shafts at both ends of the rotary drum are supported by the first and second support portions, the rotary drum can be fixed in the playing section unit. Since it can be manufactured and stored independently and has a space between the second shaft support portion and the end plate, the design of the transmission structure to the end plate for the driving force generated by the driving body attached to the driving body mounting portion is provided. The degree of freedom can be increased, and various driving bodies can be supported.

In the case where the gear structure according to the second aspect and the engagement structure according to the third aspect are provided on the end plate, the arrangement of the member that engages with the end plate by the space between the end plate and the second shaft support portion. The degree of freedom of design such as shape and shape is increased, and a large number of driving bodies can be attached.

According to the fourth aspect, when the electric motor is mounted via the mounting plate, the electric gear train can be appropriately arranged on the mounting plate to transmit the rotation to the end plate. In this case, since a space is provided between the end plate and the shaft support portion, a sufficient space for disposing a gear engaged with the end plate or a gear located on the end face side of the end plate in the transmission gear train is provided. As a result, the gear train can be freely designed, and the playing unit can be adapted to various models.

According to the fifth aspect, by disposing the output shaft of the electric motor on the installation side of the diaphragm, the distance along the installation area of the diaphragm exists in the frame, so that the transmission gear train can be handled. It becomes easy, and it becomes possible to arrange the transmission gear train in the frame of the performance unit,
Accidents such as gear breakage due to impact can be prevented.

According to the sixth aspect, the inclined guide surface is provided on the inner surface side of the mounting shaft support portion of the mounting plate, so that the end of the gear shaft is brought into contact with the inclined guide surface at the end of the assembly of the transmission gear train. Since the front and rear gears can be meshed from above only by sliding toward the mounting shaft support, the transmission gear can be assembled very easily. In this case, by assembling the gear shaft in the middle of the transmission gear train last, it is possible to safely and easily assemble the transmission gear train by avoiding damage to the playing part due to reversal of the rotating drum and damage to the gear caused by stress. Can be.

According to the seventh aspect, the rotating gear rotatably mounted on the shaft end of the rotating drum is engaged with the worm shaft, whereby the rotating gear is rotated by the rotation of the worm shaft, and the claw of the rotating gear is used. The end plate is driven to rotate in one direction, and the pawl is disengaged in the opposite direction so that rotation is not transmitted.
In this case, since an interval is provided between the end plate and the shaft support portion, a sufficient arrangement space for configuring the ratchet mechanism by the engagement structure of the end plate and the rotary gear having the claw can be taken, and the reverse rotation can be achieved. While enabling the rotation of the rotating drum that was prevented,
Compatible with many models with various drive units.

According to the eighth aspect, the end plate is rotated in one direction by operating the push lever by fixing the push lever provided with the pawl which is disengaged from the engagement structure in the rotation direction. Can be. In this case, a space is provided between the end plate and the shaft support portion, so that the engagement structure of the end plate and the pawl of the push lever can provide a sufficient arrangement space for configuring the ratchet mechanism, and prevent reverse rotation. While being able to drive the rotating drum, it is possible to cope with many models having various driving units.

[Brief description of the drawings]

FIGS. 1A and 1B are a plan view and a front view, respectively, showing the overall configuration of a music box playing section unit according to an embodiment of the present invention.

FIGS. 2A and 2B are a plan view and a front view, respectively, showing the structure of an embodiment of a music box in which a drive unit having an electric motor and a transmission gear train is attached to the playing section unit.

FIG. 3 is a plan view (a) and a front view (b) showing the structure of an embodiment of a music box in which a driving body having a manual handle and a ratchet mechanism is attached to the playing section unit.

FIG. 4 is a plan view (a) and a front view (b) showing the structure of an embodiment of a music box in which a driving body having a push lever and a ratchet mechanism is attached to the playing section unit.

FIG. 5 is a plan view showing a conventional music box driven by an electric motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2, 12 Shaft support part 3 Rotary drum 4 Vibrating plate 5 Mounting plate 6 Electric motor 31 Large diameter gear 31a Ratchet engaging surface A Drive body mounting part 54 Rise part 54a Inclined guide part 80 Drive shaft 86 Ratchet gear 90 Push lever

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A Sho 59-192197 (JP, U) JP-A 1-73897 (JP, U) JP-A 6-25889 (JP, U) JP-A 7- 26892 (JP, U) Jikken Sho 31-7068 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) G10F 1/00-5/06

Claims (9)

(57) [Claims] 1. A frame, a rotating drum rotatably supported on the frame and having an engaging pin implanted on a peripheral surface thereof, and a rotating drum fixed on the frame adjacent to the rotating drum. A music box playing section unit having a diaphragm arranged to be engaged with an engagement pin, wherein the frame has first and second pivots that pivotally support both ends of the rotary drum, On the installation side of the second pivot
And a driving body mounting portion disposed therein.
A space is provided between the shaft support and the end plate of the rotary drum,
An engagement structure capable of transmitting a driving force is provided on the end plate, and various types of driving the rotary drum are provided on the driving body mounting portion.
Select from the driver or transmission mechanism of
The drive or transmission mechanism configured for
Screw holes for attachment, and the driving body or transmission
There is a positioning boss for positioning the mechanism
Music box play part unit, characterized in that there. 2. A frame, a rotating drum rotatably supported on the frame and having an engaging pin implanted on a peripheral surface thereof, and a rotating drum fixed on the frame adjacent to the rotating drum. A music box playing section unit having a diaphragm arranged to be engaged with an engagement pin, wherein the frame has first and second pivots that pivotally support both ends of the rotary drum, On the installation side of the second pivot
And a driving body mounting portion disposed therein.
A space is provided between the shaft support and the end plate of the rotary drum,
An engagement structure capable of transmitting a driving force is provided on the end plate, and various types of driving the rotary drum are provided on the driving body mounting portion.
Select from the driver or transmission mechanism of
The drive or transmission mechanism configured for
Screw holes for attachment, and the driving body or transmission
There is a positioning hole for positioning the mechanism.
Music box play part unit, characterized in that that. 3. The music box playing section unit according to claim 1, wherein the engaging structure is a gear structure having teeth formed on an outer periphery thereof. 4. The music box playing section unit according to claim 1, wherein the engaging structure is a tooth structure formed on an end surface of the end plate and capable of engaging with a claw. 5. A mounting plate is fixed to the driving body mounting portion of the playing section unit according to claim 1, and an electric motor is mounted on the mounting plate, and an output of the electric motor is transmitted to the mounting plate. A music box provided with a playing section unit, wherein the music piece is transmitted to the end plate via a transmission gear train supported by a shaft. 6. The playing section unit according to claim 5, wherein the electric motor is disposed outside the second shaft support, and an output shaft of the electric motor is provided on a side where the diaphragm is installed. Music box with. 7. The mounting shaft support according to claim 5, wherein at least one of a pair of mounting shaft supports of the mounting plate for supporting a gear shaft positioned above the transmission gear train is provided. A music box provided with a performance unit, wherein a slant guide surface formed outward is provided. 8. A performance plate unit according to claim 4, wherein a mounting plate is fixed to said driving body mounting portion, and said end plate and said second plate are fixed.
A rotatable gear having a claw that is engaged with and disengaged from the ratchet wheel in a rotational direction between the rotatable shaft and the rotatable shaft, and a worm shaft that meshes with the rotatable gear is mounted on the mounting plate. Music box with a performance unit. 9. A push lever provided with a claw, which is provided on the driving body mounting portion of the playing section unit according to claim 4, and has a claw which is engaged with and disengaged from the engagement structure in a rotation direction. Music box with a performance unit.