JPS6139346Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of a watch case with an alarm.

An example of a conventional watch case with an alarm is the first case.
There is one shown in the figure. The alarm device 1 includes a spring 4 arranged in a cylindrical portion 2a provided inside an outer body 2 via a gasket 3 and fixed to a module 4.
It is pushed upward and fixed by a.
A sound emitting hole 2b is provided in the upper part of the outer body 2 located above the diaphragm 1a of the alarm device 1.

Since this alarm watch case has an alarm device placed inside the case, it is necessary to increase the volume of the entire case. In addition, since a seal is interposed on the outer diameter of the alarm device to make it waterproof, it is necessary to precisely turn the inner diameter of the cylindrical portion 2a of the outer body 2, which is different from the conventional reuse method formed with a drill and reamer. , unlike the hole machining for pushbuttons, the machining process is time-consuming. Furthermore, since the alarm sound emitted from the diaphragm is emitted through a small sound emitting hole, the sound emitting effect is poor and there are some problems.

The present invention was devised in view of the problems faced by the conventional alarm clocks mentioned above.It has a flat upper part and a cylindrical lower part, and an alarm clock such as a piezoelectric plate, a diaphragm, or a front cover is installed in the opening recess of the upper part. The alarm device is made by attaching the generator parts and inserting the connector into the lower cylindrical part, and is watertightly attached from the outside of the case.The alarm device itself is made into a thin unit, and the watch case is made thinner. It is.

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

2 and 3 show embodiments of the present invention; FIG. 2 is a sectional view of a watch case with an alarm, and FIG. 3 is a sectional view of an alarm device unit.

The watch case consists of a body 10 to which a glass 11 is fixed and a back cover 12, and the body 10 and the back cover 12 are engaged with each other by a bite. The module 20 is attached to the body 10 via a spring 13, and the display section 2
1 is confirmed from the outside through the glass 11.

The barrel 10 has a stepped through hole 14 in the upper part,
The hole portion 14a of the stepped through hole 14 is formed in a perfect circular cylindrical shape, but the stepped portion 14b is formed in an irregularly shaped cylindrical shape. Hole portion 14a of this stepped through hole 14
Since the diameter is smaller than the outer diameter of the alarm device unit, which will be described later, machining is accomplished using a drill and reamer. Furthermore, the stepped portion 14b is formed by pressing.

The alarm device unit 30 is disposed in the stepped through hole 14 of the body 10 and fixed by a C ring 31, and a connector 32 protruding from the bottom of the alarm device unit 30 is brought into contact with the connection part of the module 20. There is. This alarm device unit 30 is composed of a flat upper part and a cylindrical lower part, and is formed in a T-shape in axial section. A groove 35 for a waterproof O-ring 34 and a groove 36 for a C-ring 31 are provided on the outside of the cylindrical portion to be press-fitted with the hole 14a of the body 10, and a connector for electrical connection is provided on the inside of the cylindrical portion. 32 are buried.
The opening recess 33 includes a piezoelectric plate 37 that is in contact with the connector 32 provided in the lower cylindrical part, a diaphragm 38 that is fixed to the piezoelectric plate 37, and a diaphragm 38 that is fixed to the piezoelectric plate 37.
A waterproof gasket 39 is placed on the bottom of the opening recess 33 in contact with the diaphragm 38 .
A front cover 40 is provided which is compressed through.
The front cover 40 has a large number of sound emitting holes 40a on its surface, and is press-fitted onto the upper edge of the opening recess 33.
Note that the connector 32 is in light contact so as not to interfere with the vibration of the diaphragm 38.

FIG. 4 shows another embodiment of the alarm device unit 30, in which the bottom surface of the opening recess 33 is brought close to the diaphragm 38, and when the diaphragm 38 is deformed inwardly by external pressure, the diaphragm It functions to support the 38 and prevent its destruction.

Note that the means for attaching the front cover 40 to the opening recess 33 may be a method of press-fitting synthetic resin between the two.

As described above, the present invention compresses and arranges a waterproof packing between the bottom surface of the flat upper opening recess and the diaphragm, and fixes the diaphragm with a front cover fixed to the upper edge of the opening recess. Furthermore, since this upper part is arranged at the stepped part of the stepped through hole of the body, the alarm device can be assembled into a thin structure, and the alarm device can be attached to the case without increasing the storage volume inside the case. In addition, the connector that electrically connects the module and the alarm generation mechanism is inserted into the cylindrical part of the alarm device unit, and this cylindrical part is inserted into the perfectly circular hole of the stepped through hole in the body through a waterproof O-ring. Since it is inserted and fixed, the diameter of the circular hole can be reduced, and the waterproofness is as reliable as conventional reuse and push buttons. Furthermore, even if the external shape of the alarm device is changed, the waterproofness is not impaired in any way, and the degree of freedom in external design can be increased.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional view of a conventional watch case with an alarm, Fig. 2 is a cross-sectional view of a watch case with an alarm according to the present invention, Fig. 3 is a cross-sectional view of an alarm device according to the present invention, and Fig. 4 is a cross-sectional view of a watch case with an alarm according to the present invention. FIG. 3 is a sectional view of another alarm device. 10...Body, 14...Stepped through hole, 14a...
Hole, 14b... Step, 30... Alarm device unit, 31... C-ring, 32... Connector, 33... Opening recess, 34... O-ring, 3
5, 36... Groove, 37... Piezoelectric plate, 38... Vibration plate, 39... Waterproof packing, 40... Front cover, 40
a... Sound emitting hole.

Claims (1)

[Scope of utility model registration request] In the structure of a watch case with an alarm, in which an alarm device unit is watertightly attached from the outside to a stepped through hole on the upper surface of the case, the alarm device unit is composed of a flat upper part and a cylindrical lower part,
On the outside of the lower cylindrical part, a groove is formed for a waterproof O-ring that is press-fitted into the perfectly round hole of the stepped through hole of the body, and on the inside, a connector for electrical connection with the module is arranged, and the alarm device The opening recess formed in the upper part includes a piezoelectric plate that contacts the connector disposed in the lower cylindrical part, a diaphragm that is fixed to the piezoelectric plate, and a diaphragm that contacts the diaphragm and is arranged on the bottom of the opening recess. 1. A watch case with an alarm, comprising: a waterproof gasket; and a front cover that compresses the waterproof gasket via a diaphragm and is fixed to the upper edge of the opening recess.