JPS604234Y2 - Music box operation stop mechanism - Google Patents

Description

[Detailed description of the invention] The present invention uses a locking member that is activated by the tension of the string to rotate the wind plate operated by the mainspring when a very small tension is applied to the string for winding the mainspring. This invention relates to a mechanism for stopping the operation of a music box so that the expanding force of the mainspring does not act on the string.

A pulley-like winding drum is integrally fixed to the mainspring mounting shaft of the music box, and a string for winding the mainspring is wound around the winding drum, and the string is pulled out from a small hole formed in the case. There is a type that does this.

In this type of music box, by pulling the string from the outside against the spring force of the mainspring and letting it out of the case, the mainspring mounting shaft is rotated and the mainspring is wound up, and the external force is removed from the string. Then, the mainspring expands, the winding drum is reversed, and the string is wound onto the winding drum.

At this time, the string enters the inside through the small hole in the case.

However, the spreading force of the mainspring that winds up this string was extremely strong, so if a part of a finger was caught between the case and the string at the small hole, the pinched part would become hyperemic. It was a state of affairs.

For this reason, music boxes of the type described were dangerous to children and the like.

An object of the present invention is to provide a music box operation stop mechanism that can eliminate such problems.

The basic structure of the music box operation stop mechanism of the present invention is that a mainspring and a wind panel rotated by the mainspring are housed in a case, and the string for winding the mainspring is pulled out from a small hole formed in the case. In the music box, a locking member is housed in the case so as to be able to move in and out of the rotation range of the wind panel, and the locking member is separated from the rotation range by a spring having a spring force that is sufficiently smaller than that of the mainspring. the string is engaged with the locking member such that when the string is pulled out, the locking member can be pressed and displaced into the rotation range against the spring force of the spring; The point is that

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a case.

This case 1 is composed of a rectangular frame mounting member 2 and a housing-like lid 3 detachably attached to the frame mounting member 2 (see FIGS. 2 and 3).

As shown in FIG. 3, a small hole 4 for inserting a string, that is, for pulling out a string, is formed between the engaging portion of the frame attachment member 2 and the lid body 3.

5 is a protrusion located on the opposite side of the small hole 4 and is integrally provided on the side of the lid body 3; 6 is a string insertion hole bored in the protrusion 5; 7 is attached to the protrusion 5 by passing it through the string insertion hole 6. It is a rope for hanging.

A frame 8 housed within the case 1 is attached to the lid body 3.

This frame 8 has a mainspring mounting shaft 9 as shown in FIG.
is rotatably supported.

A mainspring (not shown) is interposed between the mainspring mounting shaft 9 and the frame 8.

In addition, the frame 8 is equipped with a bullet drum (
(not shown) is rotatably supported.

This drum is driven by a ratchet mechanism (not shown) consisting of a series of gears (not shown) so that it can be rotated only by the rotation of the mainspring mounting shaft 9 when the mainspring is expanded (unwound). It is linked to the mainspring mounting shaft 9 via.

Furthermore, this drum is linked to a wind panel 10 rotatably attached to the frame 8 via a series of gears (not shown).

When such an accompaniment drum rotates, a sound-generating diaphragm (not shown) attached to the frame 8 adjacent to it is struck, and a melody is played.

11 is a string winding drum fixed to the mainspring mounting shaft 9.

12 is a lever whose one end is rotatably supported by the frame 8;
Reference numeral 2a denotes a pivot shaft that rotatably supports the lever 12 on the frame 8.

The other end side, that is, the tip (free end) of this lever 12 is configured to move forward and backward with respect to the string winding drum 11 as the lever 12 swings.

A pulley 13 is attached to the middle part of the lever 12, and a wind panel 10 is attached to the other end (free end) of the lever 12.
A locking member 14 for stopping the rotation is integrally attached.

This locking member 14 is such that the lever 12 is attached to the string winding drum 11.
When the lever 12 moves away from the string winding drum 11, the wind panel 10 enters the rotation range of the wind panel 10.
The engine is designed to exit from the rotation range of the engine.

A spring 15 supported by a pivot 12a is interposed between the lever 12 and the spring locking protrusion 8a of the frame 8.

This spring 15 biases the lever 12 in a direction away from the string winding drum 11, and its spring force is set to be sufficiently smaller than that of the spring described above.

One end of a string 16 for winding up a mainspring is wound around the string winding drum 11.

The winding end of this string 16 is fixed to the string winding drum 11.

The string 16 engages with the pulley 13 and is pulled out of the case 1 through the small hole 4.

A knot 17 is provided in a portion of the string 16 outside the case 1, which engages with the small hole 4 when one end of the string 16 is wound around the string winding drum 11 to the maximum extent.

Further, a knob 18 is attached to the outer end of the case 1 of the string 16.

Next, the operation of the stop mechanism of the music box having such a configuration will be explained.

By grasping the knob 18 and pulling the string 16, the lever 12
When the lever is displaced toward the string winding drum 11 against the spring force of the spring 15, the locking member 14 enters the rotation range of the wind panel 10, and the tip 12b of the lever 12 is integrated with the frame 8. The pin 8b comes into contact with the pin 8b.

In this state, the locking member 14 and the wind panel 10 are in contact with each other, so that the wind panel 10 and the playing drum (not shown) cannot rotate.

In this state, when the knob 18 is pulled more strongly, the mainspring mounting shaft 9 is rotated, the string 16 is unwound around the string winding drum 11, and the string 16 is further drawn out of the case 1.

This causes the mainspring to wind up.

Next, by releasing the knob 18, the lever 12 is rotated in a direction away from the string winding drum 11 by the spring force of the spring 15, and the locking member 14 is moved from the wind panel 1.
At the same time as exiting from the rotation range of 0, part of the string 16
be forced inside.

This allows the wind panel 10 to freely rotate.

Therefore, when you release your hand from the knob 18, the mainspring begins to expand, the mainspring mounting shaft 9 is rotated, the accompaniment drum (not shown) is rotated, a melody is played, and the wind panel 10 is rotated. be rotated.

At this time, one end of the string 16 is wound around the string winding drum 11 and begins to enter the case 1.

When one end of the string 16 is wound up to the maximum on the string winding drum 11, the knot 17 engages with the small hole 4.

On the other hand, when the string 16 enters the case 1 due to the spreading force of the mainspring, if the string 16 is pulled with a force that is sufficiently smaller than the spring force of the mainspring and slightly larger than the spring force of the spring 15, the lever 12 moves the string 16. Due to the tension acting on the spring 15, the locking member 14 is rotated toward the string winding drum 11 side against the spring force of the spring 15, and the locking member 14 is moved within the rotation range of the wind panel 10 as indicated by the broken line in FIGS. 2 and 3. Enter the indicated position.

As a result, the wind panel 10 comes into contact with the locking member 14,
Since the expansion of the mainspring is stopped, at this time, the expansion of the mainspring does not act on the string 16, and only the small spring force of the spring 15 acts on the string 16.

As a result, the music box stops playing.

Such an operation occurs in the same way even when a finger is caught between the string 16 and the small hole 4.

Note that since the lever 12 is rotated by the tension of the string 16, the direction in which the string 16 is pulled out of the case 1 can be changed by changing the engagement position of the string 16 with the lever 12, the shape of the lever 12, etc. I can do it.

Furthermore, instead of the pulley 13, a roller may be provided at the engagement portion of the string 16 with the lever 12.

Since the present invention is configured as described above, the following effects are produced.

■ By simply applying a tension that is sufficiently smaller than the spring force of the mainspring to the string, it is possible to stop the mainspring from expanding, thereby stopping this spreading force from acting on the string.

As a result, even if a part of the finger is accidentally caught between the string and the small hole, only a very small pinching force will be applied to the finger, thereby preventing pain and congestion in the finger.

■ The direction in which the string is taken out of the case is the same as that of conventional music boxes, so it can be applied to most models without making any changes.

■ Can also be applied to music boxes with deep cases.

■ Since it does not use a quick return method, there is no need to worry about the knobs hitting your face or hands.

[Brief explanation of the drawing]

FIG. 1 is a side view of a music box showing an embodiment of the present invention. FIG. 2 is a partially cutaway front view of the music box shown in FIG. 1. FIG. 3 is a back view of the frame of the music box shown in FIG. 1 with the frame mounting member removed from the frame. 1... Case, 9... Mainspring mounting shaft, 10... Wind panel, 11... String winding drum, 12... Lever, 13...pulley, 14...locking member, 15...spring, 16...string.

Claims (1)

[Scope of utility model registration request] A music box in which a mainspring and a wind board rotated by the mainspring are housed in the case, and a string for winding the mainspring is drawn out from a small hole formed in the case, wherein the wind board is housed in the case. A locking member is housed so as to be able to move in and out of the rotation area, and the locking member is biased in a direction away from the rotation area using a spring whose spring force is sufficiently smaller than that of the mainspring, and the string is An operation stop mechanism for a music box, characterized in that the locking member is engaged with the locking member so that the locking member can be pressed into the rotation range against the spring force of the spring when the locking member is pulled out.