JP3108865B2 - Electronic clock with vibration alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic timepiece for transmitting time information by vibration, and to an electronic timepiece with a vibration alarm having a means for transmitting vibration on a back cover.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional electronic timepiece with a vibration alarm generates an hour / minute hand for displaying time, a wheel train for driving the hour / minute hand, a motor for driving the wheel train, and vibration. Of the movement 1, which is constituted by the motor 1, the motor for driving the wheel train, and the circuit for controlling the motor for generating vibration, is provided with a margin on the inner circumference of the watch case 3 and the outer circumference of the movement 2. . An eccentric weight is attached to the rotating shaft of the motor 1 that generates vibration (not shown),
By rotating the watch at a high speed, the centrifugal force generates vibrations and vibrates the entire watch. Vibration of the entire timepiece was transmitted from the case 3 to the wrist through the case back 4 having a flat bottom surface.

[0003]

However, in the conventional electronic watch with a vibration alarm, the back cover of the watch is lifted from the surface of the wrist depending on how the belt is fastened or the posture of the watch because the bottom shape of the back cover is flat. It was difficult to transmit the vibration to the arm. Further, when the back lid is provided with a shape that is convex on the side opposite to the movement, there is a problem that the material thickness of the back lid increases and the weight increases.

[0004]

According to the present invention, there is provided a vibration transmitting means which is made of a uniform material so that the bottom surface of the back cover contacts the arm. This makes it possible to provide a back cover that transmits vibrations well, is lightweight, and is easy to process.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In an electronic timepiece with a vibration alarm according to the present invention, a movement provided with a vibration generating means is mounted in a case, and a vibration transmitting means is provided on a back lid fixed to the inner diameter of the case. The vibration transmitting means has a shape in which a part of the back cover is convex on the side opposite to the movement, but it is more effective if it has a shape that sinks into the arm.

[0006] Further, as for the shape in which a part of the back lid is convex on the side opposite to the movement, it is preferable to provide a shape that is curved and convex from 12:00 to 6:00. Further, a shape in which a part of the back lid is convex on the side opposite to the movement can be easily manufactured by drawing with a substantially uniform material.
As described above, the shape of the back cover closely contacting the arm ensures transmission of vibration.

[0007]

An embodiment will be described with reference to the drawings. FIG. 1 is a sectional view of an electronic timepiece with a vibration alarm according to an embodiment of the present invention, and FIG. In FIG.
A movement 2 provided with a motor 1 for generating vibration by rotating an eccentric weight (not shown) is engaged with the inner diameter of the case 3. The movement 2 is fixed by pressing and deforming the fixing projection 2a formed of an elastic member provided on the movement 2 with the back cover 4 incorporated in the case 3. Back lid 4
Concave portion 3a provided on case 3 and convex portion 4b provided on back cover 4
Are engaged and become integral with the case 3. The back cover 4 is provided with a means for transmitting vibration, that is, a projection 4 a on the opposite side to the movement 2. The convex portion 4a is formed in a curved shape so as to be in close contact with the shape of the arm. As shown in FIG. 2, the direction of the convex portion 4a is more effective when provided in the direction from 12:00 to 6:00.

In another embodiment shown in FIG. 3, means for transmitting vibration, that is, the shape of the convex portion 5a of the back cover 5 is a hemispherical shape .
It is composed of a part . When a part of this hemispherical shape comes into close contact with the arm, the same effect as in the above embodiment can be obtained. In another embodiment shown in FIG. 4, a vibration transmitting means, that is, a convex portion 7 composed of a part of a hemispherical shape made of a hard material such as plastic is fixed to the back cover 6 by bonding or the like to the back cover 6. The same effects as in the above embodiment can be obtained.

[0009]

According to the present invention, in an electronic timepiece with a vibration alarm, a transmission path for transmitting the vibration of a movement provided with a vibration generating means from a back cover to an arm can be ensured. Thereby, the vibration can be easily transmitted by the close contact between the back cover and the arm. In addition, a part of the case back is curved to the side opposite to the movement and becomes convex, so that the convex shape sinks into the surface of the arm and is carried, so that the movement of the arm and the belt Even if the bottom surface of the back lid floats from the arm due to the tightening method, it is possible to reduce the reduction in the vibration transmission effect.

Further, by performing drawing with a uniform material, it is possible to manufacture a lightweight and easy-to-process back lid.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electronic timepiece with a vibration alarm according to the present invention.

FIG. 2 is a plan view showing a relationship between a back cover and an arm of the electronic timepiece with vibration alarm of the present invention.

FIG. 3 is a perspective view of a back cover of another embodiment of the electronic timepiece with vibration alarm of the present invention.

FIG. 4 is a sectional view of a back cover of another embodiment of the electronic timepiece with vibration alarm of the present invention.

FIG. 5 is a sectional view of a conventional electronic timepiece with a vibration alarm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor generating vibration 2 Movement 3 Case 4, 5, 6 Back lid 7 Convex part 8 Arm

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G04B 25/02-25/04 G04B 35/05 G04B 37/11 G04C 3/00 G04G 1/00 312

Claims (2)

(57) [Claims] 1. A constructed engaged movement in which a motor (1) for generating vibrations (2) to the inside diameter of the casing (3), the case back (4) made integral with said casing (3), Previous
Serial vibration alarm electronic timepiece, characterized in that the formation of the shape which is curved convexly toward the side opposite to the movement (2). 2. Curving to the side opposite to the movement (2)
To cut the hemisphere in a plane parallel to the plane of the hemisphere
Includes the plane portion of the two generated portions.
The vibration according to claim 1, wherein the shaping portion has a shape which is included in a portion which is not covered.
Electronic clock with motion alarm.