JPS6225746Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a watch case with an alarm.

The object of the present invention is to provide a structure of a watch case with an alarm that allows miniaturization of the acoustic device, diversity of design, and complete watertightness to the inside of the case.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.
Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a sectional view taken along line 2-2 in Fig. 1.
- It is a 3 line sectional view. Reference numeral 10 denotes a body for housing a module (not shown) inside, and a display section 10a is opened on the surface of the body, and above the display section 10a is a horizontally elongated audio device storage section 10b for storing an audio device. It is formed. A conduction hole 10d is provided in the bottom surface 10c of the acoustic device housing portion 10b, in which a spring (not shown) is disposed to establish conduction between the module housed in the body 10 and the acoustic device. 11 is the front cover, and the legs 1 are on the outer periphery of the bottom surface.
1a, and a plurality of sound emitting holes 11b are provided on the inner side of the leg portion 11a in order to release sound from a diaphragm 12 (to be described later) to the outside. Reference numeral 12 indicates a diaphragm that fits into the inner periphery of the legs 11a of the front cover 11 and is bonded to the back surface of the front cover 11, and 13 indicates the back surface of the diaphragm 12 and the bottom surface 10 of the audio device storage section 10b.
This is a piezoelectric element fixed to the diaphragm 12 and disposed in a piezoelectric element storage section 12a formed between the diaphragm 12a and the diaphragm 12a. A reinforcing plate 14 is press-fitted into the inner periphery of the leg portion 11a of the front cover 11, and serves not only to reinforce the leg portion 11a but also to fix the diaphragm 12.

Reference numeral 15 denotes a decorative plate fixed to the upper surface of the front cover 11, and a sound emitting hole 15a is appropriately provided so that the sound emitting hole 11b of the front cover 11 communicates with the outside. Reference numeral 16 denotes a gasket attached between the audio device storage portion 10b of the body 10 and the outer periphery of the front cover 11, and its outer periphery is slightly larger than the inner periphery of the audio device storage portion 10b and slightly smaller than the outer periphery of the front cover 11. has been done. As shown in FIG. 4, this packing 16 has a tapered surface 16a formed on the inner circumferential upper surface,
A relief portion 16b is formed on the lower surface of the inner circumference. 17 is a conductive ball for grounding the diaphragm 11.

Next, the assembly of this structure will be explained. The diaphragm 12 to which the piezoelectric element 13 is attached is adhered to the back surface of the front cover 11 in advance, and the reinforcing plate 14 is attached to the leg portion 1.
Press fit the diaphragm 12 into the inner circumference of the front cover 11.
A decorative board 15 is fixed to the upper surface of the front cover 11. First of all, Patsukin 16
into the audio device accommodating portion 10b of the body 10, aligning it with the inner circumference. Next, the conductive ball 17 is placed at an appropriate position on the bottom surface 10c of the audio device storage section 10b. Thereafter, the front cover 11 is press-fitted into the inner circumference of the packing 16. Thereby, the front cover 11 is fixed to the shell 10 by the elasticity of the packing 16, and watertightness to the inside of the shell can be achieved. At this time, there is a possibility that the compressive repulsive force of the packing 16 acts upward to lift the front cover 11, but this is reduced by the relief part 16b (see FIG. 4) formed on the lower inner surface side of the packing 16. , the front cover 11 is firmly fixed without being lifted up from the body 10.

In this way, the acoustic device has a simple configuration consisting of the piezoelectric element 13 and the diaphragm 12, and is arranged in a planar manner, so that the acoustic device can be miniaturized. Furthermore, since the sound device is placed on the front side of the case, the image of an alarm clock can be strongly expressed, and the design can be diversified as an alarm clock. Further, since the front cover 11 is press-fitted into the shell 10 through the packing 16, watertightness to the inside of the shell 10 is completely maintained. Furthermore, since the piezoelectric element 13 is housed in the acoustic device storage part 10b formed in the body 10, even if the diaphragm 12 is deformed by hydraulic force, the piezoelectric element 13 is supported by the bottom surface 10c of the storage part, resulting in large deformation of the diaphragm 12. is prevented. Furthermore, front cover 1
Since the reinforcing plate 14 is fixed to the inner circumference of the leg part 11a of 1, in the front cover 11 made of resin material, the reinforcing plate 14 prevents the leg part 11a from deforming inward and reducing watertightness. It can be prevented by twisting.

As is clear from the above explanation, according to the structure of the watch case with an alarm according to the present invention, the intended objectives of miniaturization of the acoustic device, diversification of design, and watertightness are achieved, and the vibration Large deformation of the plate is prevented.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figures are a sectional view taken along line 2-2 in FIG. 1, FIG. 3 is a sectional view taken along line 3-3 in FIG. 1, and FIG. 4 is a sectional view of the packing. 10: Body, 10b: Sound device storage section, 10c:
Bottom, 11: Front cover, 11a: Legs, 11b:
Sound emission hole, 12: diaphragm, 12a: piezoelectric element storage section, 13: piezoelectric element, 14: reinforcing plate, 16: packing.

Claims (1)

[Scope of utility model registration request] A body having an audio device storage portion formed on the upper surface, a gasket disposed on the inner periphery of the audio device storage portion, a sound emitting hole penetrating from the top surface to the bottom surface, and having legs on the outer periphery of the bottom surface. a front cover fixed to the inner periphery of the acoustic device storage section via the packing; a diaphragm disposed on the back surface of the front cover inside the inner periphery of the legs of the front cover; a reinforcing plate that fixes the diaphragm to the front cover by being press-fitted into the inner periphery of the legs of the front cover; and a piezoelectric element storage formed between the back surface of the diaphragm and the bottom surface of the audio device storage section. 1. A structure of a watch case with an alarm, comprising a piezoelectric element disposed in the diaphragm and fixed to the diaphragm.