JPS6210703Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrical connection between a watch alarm device and an alarm drive circuit of a movement.

As shown in FIG. 1, a conventional alarm device is composed of a magnetic core 1, a core 2, a coil 3, an excitation section 5 made of a permanent magnet, and a diaphragm 7 placed opposite the excitation section 5 via a support frame 6. has been done. The magnetic core 1 is provided with lead pins 8 and 9, and the terminals of the coil 3 are connected to the lead pins 8 and 9. The lead pin 9 is insulated from the magnetic core 1 by an insulating member 10. Coil 3 for driving the alarm device
Lead plates 11 and 12 are used to take out the terminals, and since one of the lead plates 12 is electrically connected to the alarm drive circuit through at least the back cover 13, the other lead plate 11 and the back cover 13 are connected to each other electrically. shall not be in electrical contact. Therefore, a gap must be left between the lead plate 11 and the back cover 13, and the back cover 13 cannot be brought close to the alarm device, so there is a drawback that the watch cannot be made thin.

The purpose of the present invention is to make the watch thinner by closing the gap between the lead plate and the back cover and bringing the alarm device and the back cover closer together. For this reason,
A lead plate 14 for driving the excitation part is arranged between the diaphragm 7 and the magnetic core 1, and furthermore, this lead plate guides the constituent members of the excitation part 5 and also has a length for connection with the alarm device drive circuit. By providing the hole 14a, the alarm device can be made thinner.

The present invention will be explained in detail below with reference to FIGS. 2 to 7. The core 2, the coil 3, and the permanent magnet 4 are arranged in the magnetic core 1, and the magnetic core 1, the core 2, the coil 3, and the permanent magnet 4 form an excitation part 5. The excitation section 5 and the diaphragm 7 are arranged opposite to each other with a support frame 6 interposed therebetween. The lead plate 14 for driving the excitation section includes the diaphragm 7 and the magnetic core 1.
It is arranged between the magnetic cores 1 and fixed to the magnetic core 1 with a pin or adhesive. The terminal of the coil 3 is connected to a pattern formed on the lead plate 14. Further, the lead plate 14 is provided with a portion 14b for guiding the permanent magnet 4 forming the excitation portion 5 and the like. Further, the lead plate 14 is fixed to the movement 15 with screws or the like so as to be electrically connected to the alarm device drive circuit of the movement 15. For this reason, the movement 1 of the lead plate 14
An elongated hole 14a is provided at the connection portion with 5.
Next, the structure for fixing the alarm device to the exterior is the body 17.
A sound emitting hole 16a provided in a sound emitting frame 16 of the alarm device is connected to the sound emitting pipe 18 fixed to the sound emitting pipe 18 with a shim. In this case, in the case of an exterior structure in which the movement 15 and the alarm device are close to each other as shown in FIG.
In a model with a large exterior structure as shown in FIG. 7, it is fixed to the movement 15 at the outer side 14d of the elongated hole 14a. Furthermore, if the elongated holes are made sufficiently long, even if the exterior structure becomes larger, it can be adequately accommodated. Although not shown further,
A similar effect can be obtained by providing a U-shaped lead plate instead of a long hole.

As described above, according to the present invention, since the lead plate is placed between the magnetic core and the diaphragm, the alarm device can be moved closer to the back cover of the watch, and the watch can therefore be made thinner. In addition, the alarm device can be fixed in any position according to the watch exterior structure through the elongated hole in the lead plate, increasing the degree of freedom in the design of the watch exterior. Assemble by guiding with
The effects are great, such as being able to provide an alarm device that is easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an alarm device according to a conventional embodiment, Fig. 2 is a sectional view of an alarm device according to an embodiment of the present invention, Fig. 3 is a plan view of an embodiment of the present invention, and Fig. 4 is a sectional view of an alarm device according to an embodiment of the present invention. In the example, a cross-sectional view of the excitation part, FIG.
The plan view, FIG. 6, and FIG. 7 are cross-sectional views of the embodiment of the present invention assembled into the exterior. 1...Magnetic core, 2...Core, 3...Coil, 4
... Permanent magnet, 6 ... Support frame, 7 ... Vibration plate, 1
4...Reed plate, 15...Movement, 16...
...Sound emitting frame, 17...Body, 18...Sound emitting pipe.

Claims (1)

[Scope of utility model registration request] In an alarm device comprising an excitation section composed of a magnetic core, a core, a coil, and a permanent magnet, and a diaphragm disposed opposite to the excitation section via a support frame, a permanent magnet is provided on a surface of the magnetic core opposite to the diaphragm. An alarm device for a timepiece, characterized in that a lead plate is disposed to serve as a guide for excitation part constituent members such as the like, and an elongated hole is formed at one end of the lead plate to serve as a joint with an alarm drive circuit.