JPH07302079A - Sounding structure of music box - Google Patents

Abstract

PURPOSE:To reduce the size and weight of the sounding structure of the music box on the whole by forming a resonance chamber below a base part and sounding metal. CONSTITUTION:The base body 10 is formed by folding a metallic plate in a channel-sectioned shape by press machining. This base body 10 consists of a channel-sectioned base part 10a, and a couple of arm parts 10b and 10c which are formed integrally with and in parallel to the base part 10a. The couple of arm parts 10b and l0c are provided with bearings 12 respectively, and a cylinder 16 which has plural projections implanted in its external surface is supported pivotally on the bearings 12. The base part 10a of the sounding metal 20 having thin and long scale plates arrayed in a comb shape is fitted so as to sound corresponding the projections of the cylinder 16. Further, the resonance chamber 24 is formed below the base part 10a and sounding metal 20. Superior sound effects can be obtained by the formation of the resonance chamber 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music box structure which can be mass-produced by press working and can be manufactured at a low cost, especially for toys, dolls, and mechanical timepieces.

[0002]

2. Description of the Related Art A conventional music box is shown in FIG. A motor 51, a cylinder 52 having a plurality of projections 52a planted on its outer surface, and a cylinder 52 on the base 50 which is a cast component.
Sounding metal 53 having elongated scale plates arranged in a comb shape and attached to the base 50 so as to sound corresponding to the protrusions 52a of the
And a drive gear mechanism 54 and the like interposed between the motor 51 and the cylinder 52 are substantially integrally attached.

[0003]

However, according to such a conventional technique, unevenness is formed on the upper surface of the base 50 according to the shape, size, mounting position, etc. of each of the above-mentioned components, and the components are mounted. Limited by position
The design was troublesome. Further, there are drawbacks such that the size cannot be reduced as a whole, the number of parts is increased, and the weight is increased.

Further, there are drawbacks such as high material cost, complicated assembly, troublesome, time-consuming, and high manufacturing and assembling costs. In particular, when it is used for a toy, a doll, a mechanism clock, etc., there is a problem that it is troublesome to attach and a lot of music cannot be easily exchanged.

In view of the above-mentioned circumstances, the present invention can be mass-produced by pressing, the material cost is low, the number of parts is small, the manufacturing and assembling are easy, the structure is simple, and the overall size is small. The purpose is to provide a lightweight music box structure.

[0006]

In order to achieve the above-mentioned object, a music box sounding machine structure according to the present invention has a base portion formed by bending a metal plate into a U-shaped cross section by press working, and is integrally formed on the base portion. Bearings provided on the pair of arm portions, each of which is composed of a pair of arm portions formed in parallel with each other, a cylinder having a plurality of protrusions planted on the outer surface pivotally supported by the bearings, and the cylinder A drive gear attached to one of the shaft ends, and a consonant having a comb-shaped elongated scale plate attached to the base so as to sound corresponding to the protrusion of the cylinder, and a resonance chamber at the bottom of the base and the consonant. Is formed.

Further, in at least one of the bearings, a notch portion formed in a shape to receive the shaft and opened in one direction, and a notch portion provided adjacent to the notch portion in the direction of the notch portion. It is characterized in that it is configured to include at least one shaft pressing piece that is bendable.

[0008]

According to the music box structure of the present invention, the base body is formed by pressing a metal plate into a U-shaped cross section. The base body is composed of a base portion having a U-shaped cross section and a pair of arm portions integrally formed in parallel with the base portion. A bearing is provided on each of the pair of arm portions, and a cylinder having a plurality of protrusions planted on the outer surface thereof is pivotally supported on the bearing. A musical instrument having elongated scale plates arranged in a comb shape is attached to the base so as to sound corresponding to the cylindrical protrusion. A resonance chamber is formed under the base and the bottom of the consonant.

A drive gear is attached to one shaft end of the cylinder.

Also, at least on one side of the bearing,
Attach the shaft from the opening direction to the notch part that is open in one direction and is shaped so as to receive the shaft.After that, bend the shaft pressing piece in the direction of the notch part and make contact with the shaft surface. , The shaft is rotatably held by the notch and the shaft retainer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a music box sounding machine according to the present invention will be described in detail below with reference to the drawings. 1 to 4 are
It is a figure which shows one Example of the music box sound machine structure which concerns on this invention, FIG. 1 is the same perspective view, FIG. 2 is the same plan view, and FIG. 3 is the same right side view. FIG. 4A is a side view of the cylindrical frame structure shown in FIG. 2, and shows a state in which the shaft is fitted in the cutout portion. FIG. 2B is a side view similar to FIG.
It shows a state in which the shaft is rotatably held by the cutout portion and the pair of pressing pieces.

In FIGS. 1 to 4, 10 is a base formed by pressing a relatively thin metal plate into a U-shaped cross section. The base 10 has a base 1 having a U-shaped cross section.
0a and a pair of arm portions 10b and 10c which are integrally formed in parallel with the base portion 10a.
Reference numerals 10d and 10e denote attachment portions for appropriately fixing the base body 10 at predetermined positions.

Bearings 12 and 14 are provided on the pair of arm portions 10b and 10c, respectively. A shaft hole 12a is formed in the bearing 12 of the one arm portion 10b.
The bearing 14 of the other arm portion 10c has a shape that accepts the shaft (a semicircular shape in which the lower half complements the shaft), as in the cylindrical frame structure shown in FIG. 4 (a). The cutout portion 14a that is released upward and the cutout portion 1
A pair of shaft pressing pieces 14b, which are provided on both sides of 4a and can be bent in the direction of the notch, are formed.

Reference numeral 16 is a cylinder in which a plurality of protrusions 16a are planted on the outer surface. The cylinder 16 has a pair of rotating shafts 1
6b and 16c are provided, and one rotation shaft 16b
Is rotatably supported in the shaft hole 12a of the bearing 12. The other rotating shaft 16b is attached to the notch portion 14a of the bearing 14 from the releasing direction.
Then, as shown in FIG. 4B, the pair of shaft pressing pieces 1
4b is bent in the direction of the notch and brought into contact with the shaft surface, and the rotary shaft 16c is rotatably held by the notch 14a and the shaft pressing piece 14b.

In the preferred embodiment shown in the drawings, the notch 14a is formed in the bearing 14 of the arm 10c.
The lower half of the lower half has a semicircular shape that complements the shaft.
It may have any shape.

At the shaft end of the rotary shaft 16c, the cylinder 1
A drive gear 18 is mounted which is connected to a gear interposed in a motor (not shown) for driving the motor 6.

Reference numeral 20 designates the mounting portion 20a of the cylinder 16
It is made of steel and has a comb-shaped elongated scale plate attached to the base portion 10a of the base body 10 with fixing screws 22 so as to sound corresponding to the protrusions 16a.

Mounting portion 2 for the base portion 10a and the clasp 20
In the lower part of 0a, a resonance chamber 24 having a relatively wide space and having a U-shaped cross section is formed. By forming the resonance chamber 24, an excellent acoustic effect can be obtained.

5 to 7 are views showing another embodiment of the structure of the music box sounding machine according to the present invention. FIG. 5 is a plan view of the same, and FIG. 6 is a sectional view taken along the line AA in FIG. It is a figure.
FIG. 7 is a front view. In each of these figures, the same parts as those shown in FIGS. 1 to 4 are designated by the same reference numerals.

5 to 7, reference numeral 30 denotes a base formed by pressing a relatively thin metal plate into a U-shaped cross section. The base 30 has a base 3 having a U-shaped cross section.
0a and a pair of arm portions 30b and 30c which are integrally formed in parallel with the base portion 30a.

Further, on the upper surface of the base portion 30a, a pair of barb positioning protrusions 32 are formed by cutting and raising. The inner dimensions of the pair of protrusions 32 for positioning the tongue are substantially the same as the lateral width of the mounting portion 20a of the tongue 20.

Thus, when the tines 20 are attached to the upper surface of the base portion 30a of the base body 30, temporary fixing can be performed. Further, since the pair of protrusions 32 for positioning the musical tone can be easily adjusted with a tool or the like,
The cylinder 16 can be easily fixed at a position where it can be appropriately sounded corresponding to the protrusion 16a. When a bearing 14 having a cylindrical overhead shaft structure as shown in FIG. 4A is adopted,
In particular, the adjustment of the clasp positioning is important, and this embodiment is effective.

Furthermore, the base portion 30a having a U-shaped cross section.
A substantially quadrangular resonance chamber 34 formed by die casting is press-fitted into the lower surface of the base plate 30.
And are configured integrally. The resonance chamber 34 is integrally formed with mounting portions 34a and 34b for fixing the base body 30 integrally formed with the resonance chamber 34 at a predetermined position. Reference numeral 36 is a mounting hole formed in the mounting portions 34a and 34b.

Since the mounting screw hole 34c for the ring 20 can be formed in the substantially rectangular resonance chamber 34 formed by die casting, the ring 20 can be securely attached by the fixing screw 22.

Further, since the resonance chamber 34 is molded by die casting, the resonance chamber 34 can be made to have an appropriate shape and size as needed, and a more excellent acoustic effect can be obtained.

[0026]

As described in detail above, the music box structure of the present invention has a base formed by pressing a metal plate into a U-shaped cross section and a pair of bases formed in parallel with each other. Bearings respectively provided on the pair of arm portions, a cylinder having a plurality of projections planted on the outer surface axially supported by the bearings, and one shaft end of the cylinder. A drive gear attached to, and a ring having a comb-shaped elongated scale plate attached to the base so as to sound corresponding to the protrusion of the cylinder, because a resonance chamber is formed at the bottom of the base and the ring. Pressing enables mass production, lowers material costs, and makes overall smaller and lighter.

Further, the number of parts is small, manufacturing and assembling are easy, the structure is simple, and the cost is low. Moreover, there is an effect that an excellent acoustic effect can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a music box sounder structure according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 (a) is a side view of the cylindrical overhead shaft structure shown in FIG. 2, showing a state in which the shaft is fitted in the cutout portion. (B) It is a side view similar to (a), and shows a state in which the shaft is rotatably held by the notch and the pair of pressing pieces.

FIG. 5 is a plan view showing another embodiment of the music box sounder structure according to the present invention.

6 is a sectional view taken along the line AA in FIG.

FIG. 7 is a front view of the same.

FIG. 8 is a plan view showing a conventional music box.

[Explanation of symbols]

 10 10a Base part 10b, 10c Arm part 10d, 10e Mounting part 12 Bearing 12a Shaft hole 14 Bearing 14a Notch part 14b Shaft holding piece 16 Cylindrical 16a Protrusion 16b, 16c Rotating shaft 18 Driving gear 20 Locking gear 22 Fixing screw 24a Resonating mounting part Chamber 30 Base 30a Bases 30b, 30c Arm 32 Protruding piece 34 for squealing gold positioning Resonance chamber 34a, 34b Mounting 34c Mounting screw hole 36 Mounting hole

Claims (2)

[Claims] 1. A base is composed of a base portion formed by bending a metal plate into a U-shaped cross section by press working, and a pair of arm portions integrally formed in parallel with the base portion. Bearings provided respectively, a cylinder in which a plurality of protrusions are planted on the outer surface rotatably supported by the bearing, a gear provided at one shaft end of the cylinder, and a ring corresponding to the protrusion of the cylinder. A music box sounding machine structure, characterized in that a resonance chamber is formed in the base and a lower portion of the consonant, the consonant having a comb-shaped elongated scale plate attached to the base. 2. At least one of the bearings according to claim 1, wherein the unidirectionally open notch is shaped to receive the shaft and the notch provided adjacent to the notch. A music box structure characterized by comprising at least one axial pressing piece that can be bent in the direction of the part.