JPH032956Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a waterproof music box in which the music box is housed in an airtight container.

[Prior art]

Conventionally, when fixing a music box in the accommodation chamber of an airtight container, an airtight container as shown in FIG. 11, in which an elastic ring is attached to the outside of the winding shaft and the case is welded, has been used. That is, a boss 14 for screwing the music box 1 is provided on the lower case 13, a space A is created on the lower surface of the frame 4 of the music box 1, and an elastic ring 15 is inserted into the winding shaft 9. This airtight container has a structure in which when the music box is fixed with the screws 16, the elastic ring is sandwiched between it and the lower case in a sandwich-like manner, creating a waterproof function, so variations in the strength of the screw fixation immediately result in variations in the waterproof performance. There is a drawback.

Furthermore, the inside of the music box and case is the space A mentioned above.
and space B above the music box, especially above the diaphragm.
Because the space is large and heated, there are many opportunities for temperature changes when children use it in the bath or when playing in the water in the summer, and the increase or decrease in air volume due to temperature changes causes a suction effect on water. The disadvantage is that the waterproof function deteriorates.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention proposes a waterproof music box with improved waterproof function by reducing the volume of the storage chamber and making it difficult for water to be sucked in due to air expansion and contraction due to temperature changes.

[Structure of the idea]

This invention reduces the volume of the storage chamber by lowering the height of the container above the diaphragm of the music box in a waterproof music box in which the music box is fixed in the storage chamber and the winding shaft is sealed and protruded from the airtight container. It's what I did.

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. The waterproof music box is Music Box 1 in Figures 1 to 3.
A container 2, which forms a storage chamber, and a bottom plate 3 are welded and fixed, and the upper surface of the frame 4 of the music box 1 is placed against and fixed to the lower surface of the inner pillars 2a, 2b, 2c, and 2d of the container 2. A cover 5 is welded and fixed to the lower surface of the bottom plate 3.

When the frame 4 of the music box 1 is fixed to the lower surface of each support of the container 2, the holes 2e drilled in the lower surface of the support 2a as shown in FIGS. 4 and 5 are connected to the protrusions on the frame 4 of FIG. Fits in 4a. Similarly, pillar 2
The protrusion 2f of b is fitted into the through hole 6b of the frame 4. Furthermore, welding bosses 2g on the lower surfaces of the columns 2c and 2d,
2h is the through hole 4 of the frame 4 in FIG. 6 and FIG. 7, respectively.
c and 4d, and the tip thereof is welded and fixed like the welding boss 2b in FIG. 3.

As shown in FIGS. 1 to 5, the container 2 has a concave upper side, a curved part 2i above the drum 6 of the music box 1, and a sounding function of the music box 1 above the diaphragm 7 of the music box 1. A low top plate 2j is formed to the extent that it does not obstruct the container, and the volume inside the container 2 is configured to be small.

When the bottom plate 3 is welded and fixed to the lower surface of the container 2,
As shown in FIGS. 3 and 8, the protrusion 3a is inserted into the through hole 4e of the frame 4. Furthermore, the bottom plate 3 has Fig. 2,
As shown in FIGS. 3 and 8, a cylindrical protrusion 3b and a trapezoidal protrusion 3c are formed. Projection 3
b and 3c are inserted into the rear recess 4f at the position of the barrel 8 fixed to the frame 4 and the through hole 4g on the lower side of the drum 6, respectively. The entire barrel (not shown) is housed in the barrel 8. By inserting the trapezoidal protrusion 3c into the through hole 4g, the volume of the storage chamber is reduced. A through hole 4h is bored in the center of the recess 4f of the frame 4, through which a winding shaft 9 for full winding is passed. A through hole 3d through which the winding shaft 9 is inserted is formed at the center of the cylindrical protrusion 3b of the bottom plate 3, and a recess 3e is formed around the hole 3d to insert the O-ring 1 as shown in FIG.
0 is fitted inside the containment chamber to make it waterproof. Furthermore, the welding bosses 2g, 2 are attached to the bottom plate 3 as shown in FIG.
Escape recesses 3f and 3g are formed at position h.

A pulley winding key 11 is located at the lower end of the above-mentioned Zenmai winding upper shaft 9.
are screwed together, a string (not shown) is wound around the pulley winding key 11, and the string is pulled out from the outlet 5a of the cover 5.

The cover 5 has a support 5 as shown in Figures 3 and 9.
b, 5c are formed. Bosses 5d and 5e are formed on the upper surfaces of the pillars 5b and 5c, and are inserted into recesses 3h and 3i formed on the back surface of the bottom plate 3.

The container 2 and the bottom plate 3 and the bottom plate 3 and the cover 5 are joined by ultrasonic welding. Triangular welding protrusions 3j and 5f are formed on the upper surfaces of the ribs around the bottom plate 3 and cover 5, as shown in FIG.

The operation of the music box 1 is such that when a string (not shown) is pulled out, a pulley winding key 11 is turned to wind up a whole song (not shown). The drum 6 is rotated with the speed controlled by the speed governor 12 by this full-speed driving source, and the drum's pins strike the diaphragm 7 and the music box is played.

When the waterproof music box is configured as above,
The height of the container 2 above the diaphragm 7 of the music box 1 is such that the top plate 2j is low and there is no space below the frame 4, so the volume of the storage chamber is extremely small and there is little increase or decrease in air volume due to temperature changes. It does not absorb water and prevents the waterproof function from deteriorating due to air expansion and contraction due to temperature changes, so it can be used by children in the bath,
Even if the container 2 is used for playing in the water in the summer, water does not enter the container 2.

Furthermore, the container 2 and music box 1 are fixed using the hole 2 in the support.
e and the protrusion 4a, the protrusion 2f and the through hole 4b, and the welding bosses 2g, 2h and the through hole 4c, 4d are positioned and welded and fixed securely. Once inserted and positioned, the container 2 is positioned and guided by a dedicated jig of an ultrasonic welding machine (not shown), and the ultrasonic horn is pressed against the bottom plate 3, so the container 2 and the bottom plate 3 are reliably welded, increasing the speed of the welding process. You can improve your skills.

In addition, the winding shaft 9 is sealed with an O-ring 10, and since the O-ring 10 is deformed by the pressure applied during the process of welding and fixing the container 2 and the bottom plate 3, the waterproof function is improved, unlike deformation caused by screwing. Waterproofing is ensured and quality is stabilized. Furthermore, O-ring 10
By using , it is possible to reduce variations in waterproof performance during mass production and increase reliability.

Furthermore, by fixing the frame 4 of the music box 1 to the support of the container 2, it is possible to prevent harmful vibrations from being transmitted to the music box during ultrasonic welding of the container 2 and the bottom plate 3, and to make the welding of the container 2 and the bottom plate 3 stronger. I can do it.

As mentioned above, the music box 1 is fixed to the container 2 by positioning the frame 4 with the supports of the container 2.
At this time, no force is applied to the O-ring 10, so instead of welding the welding bosses 2g and 2h, they may be fixed by screwing or press-fitting. Furthermore, the container 2, the bottom plate 3, and the cover 5
When positioning the frames 4 and welding them simultaneously, the frame 4 may be welded or screwed to the bottom plate 3 and then welded.

The ultrasonic welding means for the container 2 and the bottom plate 3 is advantageous in terms of short time and quality, but since no suction action of water occurs in the container 2, means other than ultrasonic welding may be used.

Although the O-ring 10 was used for the seal in the above description, other sealing rings may be used.

In the above description, the pulley winding key 11 of the winding shaft 9 is screwed together, but a winding key for manual winding may be screwed together. At this time, it is not necessary to weld the cover 5.

[Effect of idea]

Since the present invention is constructed as described above, the waterproof function is improved, so that even when children use it in the bath or play in the water in summer, water does not enter the container and the waterproof function does not deteriorate. Moreover, it is possible to provide a waterproof music box that exhibits excellent effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional front view of the main parts showing the inside of the waterproof music box container; FIG. 2 is a cross-sectional front view of the main parts showing other positions inside the waterproof music box container; Figure 3 is a cross-sectional side view of the main parts showing the inside of the container of the waterproof music box, Figure 4 is a front view of the container taken along the - line in Figure 5, Figure 5 is a plan view showing the inside of the container, and Figure 6 is the music box. 7 is a plan view showing the top of the music box, FIG. 8 is a plan view of the bottom plate, FIG. 9 is a plan view of the cover,
FIG. 10 is a cross-sectional side view of essential parts of the ribs around the bottom plate and cover, and FIG. 11 is a cross-sectional side view of a conventional waterproof music box. 1... Music box, 2... Container, 7... Vibration plate, 9... Winding shaft.

Claims (1)

[Scope of utility model registration request] A waterproof music box in which the music box is fixed in the storage chamber and the winding shaft is sealed and protrudes from the airtight container, and the volume of the storage chamber is reduced by lowering the height of the container above the music box's diaphragm. Waterproof music box.