JPS6143269Y2 - - Google Patents

Description

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

FIG. 1 is a sectional view of an embodiment of a conventional digital watch with an alarm. FIG. 2 is a plan view of FIG. 1.

1 is a liquid crystal panel that displays the time and other information. Reference numeral 2 denotes a battery, which overlaps the liquid crystal panel 1 in the cross-sectional direction.
3 is an IC, which functions to convert the reference signal from the crystal oscillator 4 into a time display signal, etc.
5 is a circuit board on which wiring is provided. Reference numeral 6 denotes a dish-shaped buzzer diaphragm to which a circular piezoelectric element 7 is fixed. IC3
When a buzzer drive signal is applied to the piezoelectric element 7 through the coil spring 8, the piezoelectric element 7 bends, causing the diaphragm 6 to vibrate and generate an alarm sound.
Reference numeral 9 denotes a circular buzzer cover with a threaded circumference and a sound emitting hole 10. 11 is a watch case, which has a threaded part 12, and a waterproof gasket 1.
By screwing the diaphragm 6 with the buzzer cover 9 through the screws 3, the buzzer part is made waterproof and the diaphragm 6 is fixed.

The drawbacks of the conventional electronic watches with alarms as described above are listed below.

That is, since the diaphragm 6 is circular, in order to ensure the volume of the buzzer, the diameter of the diaphragm that freely vibrates must be φ10 mm or more. Therefore, considering the width of the waterproof gasket 13 and the dimensions of the threaded portion 12, the outer diameter of the buzzer cover 9 will be φ12 mm or more. If the maximum outer diameter of the watch movement is φ30 mm, the time display section 14 will be small as shown in FIG. 2, and will be eccentric from the center of the watch, resulting in a very poor design for a watch.

Furthermore, since the buzzer cover 9 is fixed with screws, it is difficult to tighten the screws so that the direction of the sound emitting hole 10 is constant, resulting in a very poor design as shown in FIG.

The present invention aims to eliminate such drawbacks, and its purpose is to construct a thin alarm electronic timepiece with good design.

FIG. 3 is a sectional view of a digital clock with an alarm according to an embodiment of the present invention. FIG. 4 is a plan view of FIG. 3.

21 is a liquid crystal panel that displays the time and other information. Reference numeral 22 denotes a battery, which is arranged parallel to the liquid crystal panel 21 in a plane with the same longitudinal direction. 23 is
It is an IC and functions to convert the reference signal from the crystal oscillator 24 into a time display signal, etc. 25
is a circuit board with wiring on its surface. 2
Reference numeral 6 designates a diaphragm having a deformed rectangular shape having a bottom portion 26a and a rising portion 27b by drawing into the shape of a lunch box, and a piezoelectric element 27 having a substantially similar shape is fixed thereto. An alarm drive signal from the IC 23 is applied to the piezoelectric element 27 via a contact spring 28. As a result, the piezoelectric element 27 bends, causing the diaphragm 26 to vibrate and generate an alarm sound. 29 is a buzzer cover having approximately the same shape as the diaphragm 26 and has a sound emitting hole 30. Reference numeral 31 denotes a watch case, which has a buzzer wiper 32, to which a diaphragm 26 and a buzzer cover 29 are fixed via a waterproof ring 33 made of plastic material, and further maintains waterproofness from the inside of the watch.

In this embodiment, the liquid crystal panel 21 and the battery 22 are arranged in a plane, and the battery 22 is placed under the diaphragm 26, so that the watch is small and thin.

Further, the volume of the buzzer increases as the area of the diaphragm increases, so by making the diaphragm 26 rectangular, increasing the length of the diaphragm, and increasing the area, the volume increased. Furthermore, since the width of the diaphragm 26 is small, the time display section 34 is large and close to the center of the watch, making it easy to read the time, as shown in FIG.
It is a thin electronic clock with a well-designed alarm.

Furthermore, by forming the piezoelectric element 27 into a rectangular shape that is substantially similar to the diaphragm 26, the sound volume can be increased.

In addition, in order to ensure sufficient sound emission, a recess 29a is provided on the inner surface of the buzzer cover 29, and a through hole 3 is provided on the watch case.
1a is provided to form a vibration space.

Further, the buzzer cover 29 has a substantially rectangular shape,
Since the sound emitting hole 30 is pressed and fixed to the watch case 31 via the waterproof ring 33, the sound emitting hole 30 is set at an accurate position with respect to the watch case 31. This eliminates the problem of the appearance becoming ungainly.

Further, the waterproof ring 33 is compressed between the rising portion 26a of the diaphragm 26 and the inner wall 32a of the buser wiper 32, increasing the fixing force of the diaphragm 26 and providing a highly reliable waterproof structure. This structure is conventionally used in the waterproof structure of cover glasses, and is reliable and easy to assemble.

In the above embodiments, the buzzer is a piezoelectric buzzer, but it may also be an electromagnetic buzzer. FIGS. 5 and 6 are cross-sectional views of one embodiment of an electronic timepiece equipped with an electromagnetic buzzer.

41 is a watch case, 42 is a waterproof ring, 43 is a buzzer cover, and 44 is a circuit board. 45 is a diaphragm drawn into the shape of a lunch box, and a movable iron piece 46 made of a magnetic material is fixed thereto. 47 is a coil, 48 is a yoke made of a magnetic material, and 49 is a magnet, which are set into the buser case 50 by a throwing method. Further, the magnet 49 is stopped by the watch case 41 so that it does not come off upward.

Fig. 6 shows the buser structure when it becomes a double diaphragm, where 61 is a secondary diaphragm drawn into the shape of a lunch box, 62 is a main diaphragm, and a movable iron piece 63 made of a magnetic material is fixed. There is. The main diaphragm 62 is closely fixed to a watch case 64.

In the embodiments shown in Figs. 5 and 6, the drive coil is placed over the diaphragm fixed to the case via a waterproof ring, but since the mounting part of the diaphragm can be made thinner, the sound emitting part can be made thinner. It doesn't have to be thick.

From the above, even in the case of an electromagnetic buzzer, by using the same diaphragm fixing structure as that of a piezoelectric buzzer, it is possible to obtain an electronic clock with an alarm that is waterproof, has good design, and has good sound emission.

As described above, in the present invention, the diaphragm of the buzzer is formed by drawing into a rectangular shape having a bottom part and a rising part.
A waterproof ring is interposed between the rising part and the inner wall of the buzzer of the case, and a rectangular buzzer cover is press-fitted to the inner circumference of the rectangular diaphragm, thereby fixing the diaphragm to the case and keeping it waterproof at the same time. Because of this, the thickness of the diaphragm attachment part can be reduced, and even if electronic components such as batteries or drive coils are stacked on the drive plate, the overall thickness of the watch will not be increased. Furthermore, since the diaphragm can be made rectangular, a sufficient vibration area can be obtained. Furthermore, since the diaphragm is attached at the same time as the buzzer cover, the workability is excellent.

Although the above-mentioned embodiments are digital watches, the present invention can be applied to all types of electronic watches, such as analog electronic watches and electronic watches that have digital and analog functions at the same time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of a conventional digital watch with an alarm. 6...Circular dish-shaped diaphragm, 7...Circular piezoelectric element, 9...Circular buzzer cover with threaded periphery, 10...Sound emission hole of buzzer cover, 1
1...Watch case, 13...Waterproof packing. FIG. 2 is a plan view of FIG. 1. 14... Time display section. FIG. 3 is a sectional view of a digital clock with an alarm according to an embodiment of the present invention. 21...LCD panel that displays time etc., 22
...Battery, 26...Diaphragm having a deformed rectangular shape drawn into the shape of a lunch box, 27...Piezoelectric element having a similar shape to the diaphragm, 28...Contact spring, 29
... Buzzer cover, 30 ... Sound emitting hole of buzzer cover, 31 ... Watch case, 33 ... Waterproof ring. FIG. 4 is a plan view of FIG. 3. 34...Time display section. FIG. 5 is a sectional view of an embodiment of an electronic watch with an electromagnetic buzzer. 45...A diaphragm drawn into the shape of a lunch box,
46...Movable iron piece, 47...Coil, 48...Yoke, 49...Magnet, 50...Bucer case. FIG. 6 is a sectional view of an embodiment of an electronic watch with an electromagnetic buzzer comprising a double diaphragm. 61...Sub diaphragm, 47...Main diaphragm, 48...
…Movable piece of iron.

Claims (1)

[Scope of utility model registration request] In an electronic watch with an alarm, which has a liquid crystal panel 21 and a buzzer diaphragm 26 placed side by side with the display panel on the display surface side of the watch case, the diaphragm is drawn into a rectangular shape having a bottom portion 26a and a rising portion 26b. and said watch case 3
1 forms a buser wiper 32 on which the diaphragm is placed, the bottom part of the diaphragm is placed on the buser wiper, and the rising part and the inner wall of the buser wiper are opposed to each other via a waterproof ring made of plastic material. In addition, a buzzer cover having a rectangular sound emitting hole is press-fitted into the inner wall of the rising part and the waterproof ring is compressed to fix the diaphragm to the watch case, making it waterproof at the same time, and further suppressing the vibration. The longitudinal direction of the plate is made to coincide with the longitudinal direction of the liquid crystal panel, and a space for vibration of the diaphragm is formed between the buzzer cover and the case facing the rectangular diaphragm and the diaphragm, and further a battery is provided. An electronic watch with an alarm, characterized in that electronic components such as the above are arranged over the diaphragm.