JPH0350476Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] This invention relates to the sound emitting structure of an electronic wristwatch.

[Background of the idea]

In recent years, for electronic watches that emit an alarm at a set time, consideration has been given to attaching a rattle-shaped horn to the sound emitting part of the watch case to make the alarm sound louder, but making the horn louder would hide the display part. Therefore, it is necessary to make it smaller. However, in order to increase the alarm sound with a small horn, the structure of the horn becomes complicated, and the manufacturing and installation work becomes troublesome.

[Purpose of invention]

This idea was developed against the background of the above-mentioned circumstances, and aims to provide a sound emitting structure for an electronic wristwatch that can make the alarm sound louder with a small attachment, has a simple structure, and is easy to install. be.

[Key points of the idea]

In order to achieve the above purpose, this invention creates a resonant space between the attachment and the watch case by attaching an attachment to the watch case so as to cover the sound emitting hole that emits the alarm sound. The alarm sound is made louder in a resonant space.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 4.

FIGS. 1 and 2 are external perspective views of an electronic wristwatch, and numeral 1 in the figures is a watch case. This watch case 1 includes a display section 2 that displays information such as time,
A sound emitting hole 3 that emits an alarm sound at a set time, and volume switches 4, 4, etc. that adjust the volume of the alarm sound are provided on both sides of the sound emitting hole 3, and a volume switch 4 is provided on the side wall of the watch case 1. Push button switches 5, 5 for adjusting the time, setting the alarm time, etc. are provided corresponding to the buttons 4, 4. Further, an attachment 6 that covers the sound emitting hole 3 is attached to the watch case 1 so as to be latched onto the heads 5a, 5a of the push button switches 5,5.

3 and 4 show cross-sections of essential parts thereof, with FIG. 3 being an enlarged sectional view taken along the - line in FIG. 2, and FIG. 4 being an enlarged sectional view taken along the - line. As shown in FIG. 3, on the upper part of the watch case 1, a watch glass 7 is attached to the right side through a gasket 7a, and a volume switch 4, which will be described later, is provided on the left side. Further, a watch module 8 is arranged inside the watch case 1, and a back cover 9 is attached to the lower part. The clock module 8 is a mechanical part for all functions such as clock function and alarm function.
As shown in FIG. 3, it includes an upper housing 10 and a lower housing 11, with a circuit board 12 disposed between them. On the upper surface of this circuit board 12, an electronic component 13 such as an LSI is provided corresponding to the above-mentioned watch glass 7, and a liquid crystal display device 14 is arranged via interconnectors 14a, 14a. Electrode terminals 15, 15, which will be described later, are provided corresponding to the volume switches 4, 4. Further, under the circuit board 12 is a battery 16.
is held down by the holding plate 17.

In addition, each housing 10 of the clock module 8,
11, as shown in FIG. 4, a sounding body 18 is provided corresponding to the sound emitting hole 3 described above. This sounding body 18 emits an alarm sound at a set time, and an iron core 18 is located at the center of the bottom inside the case body 18a.
b, a coil 18c is provided around the coil 18c, a magnet 18d is provided around the coil 18c, and a diaphragm 18e is arranged above the magnet 18d. In this case, the case body 18a acts as a Helmholtz resonator, and the alarm sound generated by the vibration of the diaphragm 18e is increased and is emitted to the outside from the sound emitting hole 3 formed in the watch case 1. It's summery. Further, volume switches 4, 4 are provided on both sides of the sound emitting hole 3. The volume switches 4, 4 are made of elastic material such as rubber, and one is a switch that increases the alarm sound, and the other is a switch that decreases it. It is attached to the case 1, and protrusions 4a, 4a are formed on the lower surface thereof. Switch plates 19, 19 are arranged below the protrusions 4a, 4a, respectively. The switch plates 19, 19 each have one end connected to the watch case 1.
and the upper housing 10,
The tips of the electrode terminals 15 and 15 on the circuit board 12 are separated from each other through openings 10a and 10a formed in the upper housing 10 so as to be able to come into contact with and separate from them. In this case, the edges of each opening 10a, 10a formed in the upper housing 10 are connected to the switch plate 19,
19 is bent to form an inclined surface 10b, 10b so as to contact each electrode terminal 15, 15. Therefore, when the volume switches 4, 4 are pressed from above, the protrusions 4a, 4a on the lower surface of the volume switches 4, 4 are pressed against the switch plates 19, 4a.
19 is pushed down, the tips of the switch plates 19, 19 come into contact with the respective electrode terminals 15, 15 of the circuit board 12, thereby performing switching and increasing or decreasing the volume of the alarm sound.

Furthermore, on the watch case 1 there are also figures 3 and 4.
As shown in the figure, an attachment 6 is detachably attached. This attachment 6 forms a Helmholtz resonator that magnifies the alarm sound emitted from the sound emitting hole 3, and has a box shape with a hole 6a at the top and an open bottom. Locking portions 6b, 6b are formed, and by hooking the locking portions 6b, 6b onto the heads 5a, 5a of the push button switches 5, 5 provided on the side wall of the watch case 1, the sound emitting hole 3 can be closed. It is attached closely to the watch case 1, covering the volume switches 4, 4, and forms a resonance space 6c between the watch case 1 and the watch case 1. This resonant space 6c is designed to resonate at the alarm sound frequency of 1 to 5 KHz, and at 2 KHz and 4 KHz, thereby making the alarm sound louder and emitting the sound from the hole 6a of the attachment 6 to the outside.

Note that the push button switches 5, 5 have heads 5a, 5a.
The shaft portions 5b, 5b formed in the UO ring 5c,
It is inserted into each through-hole 1a, 1a formed in the side wall of the watch case 1 via 5c, and its tip protrudes inward, and an E-ring 5d, 5d for preventing it from coming off is attached to this protruding part. and a switch board 20 provided on the circuit board 12,
20 and is pushed out elastically. Therefore, when the heads 5a, 5a of the push button switches 5, 5 are pushed against the switch plates 20, 20, the tips of the respective shaft portions 5b, 5b move against the switch plates 20, 20, respectively.
20 is pressed to perform switching (conducting contacts not shown), thereby adjusting the time, determining the alarm time, etc.

Next, a case in which the electronic wristwatch configured as described above is used will be described.

First, when using it by attaching it to the arm, the first
As shown in the figure, the attachment 6 can be removed from the watch case 1. That is, attachment 6
When removing the attachment 6, remove the locking parts 6b, 6b of the attachment 6 from the respective heads 5a, 5a of the push button switches 5, 5 provided on the watch case 1, release the hook, and then remove the attachment 6. When the attachment 6 is lifted upward, the attachment 6 is removed from the watch case 1. When the attachment 6 is removed in this manner, the attachment 6 does not get in the way even when the electronic wristwatch is attached to the wrist, resulting in good portability. Further, by pressing the volume switches 4, 4 as appropriate in this state, the volume of the alarm sound can be adjusted. That is, when one of the volume switches 4, 4 is pressed, the protrusion 4b formed on the lower surface pushes down the switch plate 19, and the switch plate 19 comes into contact with the electrode terminal 15 of the circuit board 12, so that switching is performed. . This adjusts the volume of the alarm sound.

Furthermore, when using the electronic wristwatch as described above as an alarm clock, an attachment 6 may be attached to the watch case 1 as shown in FIG. That is, when attaching the attachment 6, after placing the attachment 6 on the watch case 1 so as to cover the sound emitting hole 3 and the volume switches 4, 4, as shown in FIG. The stop portions 6b, 6b may be hooked onto the heads 5a, 5a of the push button switches 5, 5. Then, the attachment 6 is attached to the watch case 1 in close contact. In this way, when the attachment 6 is attached, a resonance space 6c is formed between the attachment 6 and the watch case 1, so that the alarm sound generated from the sounding body 18 in the watch case 1 is transmitted through the sound emitting hole 3. The sound is emitted into the resonance space 6c, resonates in the resonance space 6c, increases the energy of the sound, and is emitted from the hole 6a of the attachment 6 to the outside as a loud sound.

However, according to the sound emitting structure of the electronic wristwatch as described above, by attaching the attachment 6 closely to the watch case 1 so as to cover the sound emitting hole 3, a resonant space is created between the attachment 6 and the watch case 1. Since the attachment 6 is configured to have a relatively small size, it is possible to emit a sufficiently loud alarm sound without increasing the size of the attachment 6. Moreover, the structure of the attachment 6 is simple, and its manufacturing and installation operations are easy. It is.

[Effect of idea]

As explained above, according to the sound emitting structure of the electronic wristwatch according to this invention, a resonant space is formed between the attachment and the watch case so as to cover the sound emitting hole. It has the advantage that it is small in size, can make the alarm sound sufficiently loud, has a simple structure, and can be manufactured and installed easily.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, with Figure 1 being a perspective view of the exterior with the attachment removed;
The figure is a perspective view of the external appearance with the attachment attached, Figure 3 is an enlarged sectional view taken along the - line in Figure 2, and Figure 4 is an enlarged sectional view taken along the line -
The figure is an enlarged sectional view taken along the line - in FIG. 2. 1... Watch case, 3... Sound emitting hole, 6... Attachment, 6c... Resonance space.

Claims (1)

[Scope of utility model registration request] A wrist watch case has a sound emitting hole formed on the top surface and a push button switch arranged on the side surface, a hole is formed on the top surface, a locking part to be locked to the push button switch is formed on both sides, and the bottom side is open. A sound emitting structure for an electronic wristwatch, wherein the inside of the attachment forms a resonant space with the top surface of the wristwatch case in which the sound emitting hole is formed.