JPH0317357Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reversal prevention structure for a music box that prevents the drum from reversing with a simple structure.

In the conventional hand-cranked music box, as shown in Fig. 1, sawtooth teeth 9a are provided on the end plate 9 fixed to the side surface of the drum 2, and a reversal prevention pawl 15 is engaged to prevent the drum from rotating in the opposite direction. This prevented breakage.

However, if a small and inexpensive music box is provided with serrations or a reversal prevention pawl, it is troublesome to manufacture and assemble, and the cost is high.

The purpose of this invention is to propose a reversal prevention structure for a music box that prevents the drum from reversing with a simple structure in which the music box case is provided with a stopper, the diaphragm is provided with a stop valve, and the stop valve is butted against the end plate of the drum. There is a particular thing.

The features of the present invention include a drum that is rotatably supported by a case or frame and fed by a feeding member, and a vibration supported by the case or frame that comes into contact with a pin provided on the drum and makes a sound. a plate, a stop valve integrally provided on both sides of the diaphragm, an end plate fixed to both ends of the drum and having an abutting surface that abuts against the stop valve in the rotational direction of the drum, and the case or a stopper provided on the frame and constantly in contact with the drop valve to prevent downward deflection of the drop valve;
The end plate and the drop valve are arranged at a position where the abutment surface of the end plate and the drop valve engage when the drum rotates in the reverse direction, and the reverse rotation of the drum is caused by contact with the end plate and the drop valve. This was prevented by

The present invention will be explained below with reference to illustrated embodiments. The second example is a music box in which the drums are played by the sliding movement of a lever assembled in a case shaped like a guitar, with a reversal prevention structure of the music box.
As shown in FIGS. 5 to 5, bearing recesses are formed in two parallel jetties 1a and 1b in a case 1 imitating a guitar, and both ends of the shaft 10 of the drum 2 are fitted into the case 1 on one side of the case 1. A diaphragm 3 is fixed to the base part 1c with screws 11, and a lid 4 is attached to cover the long groove 1e bored in the one jetty 1b and the case 1.
A lever 5 of a feed member that is slidable in the horizontal direction is held by a long hole 4a bored in the shaft, and projections 4b and 4c formed inside the lid 4 are arranged above the bearing recess to prevent the shaft from moving. Both ends of the lid 10 are rotatably prevented from coming off, and the lid 4 is fixed to the case 1 with screws 12.

A plurality of pins 13 are formed on the outer periphery of the drum 2, and end plates 6, 14 are fixed to both ends. One end plate 6 has a diaphragm 3 as shown in FIGS. 3 and 4.
A serrated feed tooth 6b is formed, with which the abutment surface 6a of the drop valve 3a and the feed pawl 5d of the lever 5 come into contact.

The diaphragm 3 has valves 3 on both sides as shown in FIG.
a, 3a, a plurality of vibration valves 3b are formed between the drop valves and are repelled by the pin 13 of the drum 2, and a vibration plate 3
When the is fixed to the base part 1c, the drop valves 3 on both sides
The tips of a and 3a abut against the abutting surface 6a of the end plate 6 of the drum 2 and the outer periphery of the end plate 14 with some force and are fixed with screws 11. The lower case 1 of the drop valves 3a, 3a has protrusions 1d, 1d per degree, as shown in FIG.

As shown in FIGS. 4 and 5, the lever 5 of the feed member has protrusions 5b slidably inserted into the long grooves 1e of the case 1 on the lower and upper surfaces of the plate 5a, respectively, and the elongated holes 4a of the lid 4. It is formed by a knob 5c that is slidably projected upward after insertion, and a feed claw 5d that extends laterally from the plate 5a, and a recess 4d is formed in the lid 4 at the tip of the feed claw 5d.

The reversal prevention structure of the music box is configured as described above, the diaphragm 3 is fixed to the case 1, and the lever 5
When the knob 5c is slid in the horizontal direction as shown in FIGS.
b is fed one pitch at a time, the vibration valve 3b is played by the pin 13 of the drum 2, and the music box is played one note at a time.

At this time, the drop valves 3a, 3a are abutted against the abutting surface 6a of the end plate 6 and the outer peripheral sliding surface of the end plate 14, and when the drum 2 is rotated clockwise, the drop valves 3a
a does not work, and when the knob 5c presses against the other wall of the elongated hole 4a, the drum 2 is advanced by one bit, and the feed pawl 5d is lifted somewhat upward by the next serrated feed tooth 6b.

Next time the knob 5c is slid in the return direction,
Since the feed pawl 5d is slightly lifted by the next serrated feed dog, a counterclockwise rotating force acts on the drum 2, and the drop valve 3a is bent downward due to friction with the sliding surface. Since 1d per degree is provided on the lower side of 3a, downward deflection is prevented and the drum 2
is prevented from reversing counterclockwise.

In the above description, the outer appearance of the case was formed to resemble a guitar, but it may be formed into other shapes.

In the above description, it has been described that the lever and the feed pawl are caused to slide by sliding the knob back and forth from side to side, but the feed pawl may also be made to slide by pushing the knob in a push-type manner.

FIG. 6 shows another embodiment, case 1 of the above embodiment.
Instead, a drum 2 is rotatably supported on a frame 7 with a shaft 10, and a handle 8 is rotatably supported on the frame 7 so as to be perpendicular to the shaft 10.

One end plate 6 of the drum 2 is provided with an abutting surface 6a of a drop valve 3a and a worm gear 6c as in the previous embodiment.
are integrally formed, and a worm 8a fixed to the handle 8 is meshed with the worm gear.

As in the previous embodiment, an end plate 1 is provided on the other side of the drum 2.
4, the diaphragm 3 has drop valves 3a, 3a and diaphragm 3b.
However, the lower frame 7 of the drop valve 3a has 7 degrees per degree.
A is provided.

When the diaphragm 3 is fixed to the base of the frame 7 with the screws 11, the drop valves 3a, 3a are applied with some force to the abutment surface 6a of the end plate 6 and the outer peripheral sliding surface of the end plate 14, as in the previous embodiment. It is fixed against the butt.

When the handle 8 is rotated with the above structure, the worm 8a and the worm gear 6c rotate the drum 2.
is rotated, the vibration valve 3b is played by the pin 13, and the music box is played.

When the drum 2 rotates in the forward direction due to the rotation of the handle 8, the drop valve 3a is bent upward and the drum 2 becomes rotatable, and when the handle is rotated in the opposite direction, the drop valve 3a is pushed against the end plate 6. The drum 2 is bent downward by the sliding contact surface between the contact surface 6a and the end plate 14, but the drop valve 3a is blocked by contacting the perpendicular portion 7a, thereby preventing the drum 2 from rotating in the opposite direction.

Therefore, even if the handle 8 is attempted to be rotated in the opposite direction, it is blocked, and breakage of the vibration valve 3b is prevented.

Since the present invention is constructed as described above, it is possible to prevent the drum from reversing with a simple construction, and the stop valves are provided on both sides of the diaphragm, abut against the outer periphery of the drum end plate, and are fixed to the base to prevent the drum from reversing. Since the function is fulfilled, it is easy to manufacture and assemble, and since no other parts are required to prevent reverse rotation, the number of parts and cost can be reduced. can be provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional music box reversal prevention structure, and Fig. 2 and subsequent figures show embodiments of the present invention.
Figure 2 is an external plan view of a case imitating a guitar that incorporates a music box reversal prevention structure, Figure 3 is a plan view showing the music box reversal prevention structure inside the case with the lid and lever removed, and Figure 4 5 is an enlarged plan view of the main part of the reversal prevention structure of the music box in the case, FIG. 5 is a side view of the same, and FIG. 6 is a plan view of another embodiment. 1...Case, 1d, 7a...Per degree, 2...
...Drum, 3...Diaphragm, 3a...Suteben, 5,8
...Feeding member (lever, handle), 6, 14...
...End plate, 13...pin.

Claims (1)

[Scope of utility model registration request] a drum rotatably supported by a case or frame and sent by a feeding member; a diaphragm supported by the case or frame that comes into contact with a pin provided on the drum and is emitted to produce sound;
A drop valve integrally provided on both sides of the diaphragm, an end plate fixed to both ends of the drum and having an abutting surface that abuts against the drop valve in the rotational direction of the drum, and an end plate provided on the case or frame. and a stopper that is in constant contact with the drop valve to prevent the drop valve from deflecting downward, and the end is located at a position where the abutment surface of the end plate and the drop valve engage when the drum rotates in reverse. A reversal prevention structure for a music box, in which a plate and the drop valve are arranged, and reverse rotation of the drum is prevented by the end plate, the drop valve, and a contact.