JPH05288868A - Wristwatch with piezoelectric tactile alarm - Google Patents

Abstract

PURPOSE:To obtain a waterproof and dust-proof wrist watch with tactile alarm. CONSTITUTION:In a wrist with piezoelectric tactile alarm, a piezoelectric converter 102 where a tactile protrusion 108 and a laminated piezoelectric element 103 are incorporated is engaged and fixed to a dovetail groove 106 which is provided at a watch case 101 and has a lever structure where extension which is generated by application of voltage of the laminated piezoelectric element 103 is enlarged and then a tactile protrusion 108 protrudes from a rear lid 208 of the watch case 101 according to the amount of extension of the laminated piezoelectric element 103 which is enlarged by the lever. The wrist watch with tactile alarm can also be waterproof and dust-proof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses a piezoelectric transducer,
The present invention relates to a wristwatch that informs an alarm by touch.

[0002]

2. Description of the Related Art In the tactile alarm system, there is a tactile protrusion that pokes the skin of an arm to make an alarm, and for example, an electromagnetic transducer applying an electromagnetic force similar to a speaker is used. Fig. 5 shows the Japanese Patent Application No. 2-3 filed by the present applicant for a patent.
5 shows a cross-sectional view of the electromagnetic transducer disclosed in No. 5916. Reference numeral 501 is a watch case, 502 is an electrodynamic inner magnet type electromagnetic converter, and a yoke 503 forming a magnetic path, a permanent magnet 504, a drive coil 505, a damper 506 functioning as a vibration damper, a diaphragm 507, It is composed of a tactile projection support plate 508 fixed to the vibration plate 507 and a plurality of holes 510 provided in the timepiece case 501.

A plurality of tactile projections 509 provided on the tactile projection support plate 508 project from the plurality of holes 510. The damper 506 includes the plurality of tactile protrusions 509.
Not only as a vibration damper, but also as a waterproof and dustproof member for preventing water, perspiration, dustproofing, etc. from entering through the plurality of holes 510 provided in the watch case 501.

[0004]

However, in the damper 506 shown in FIG. 5, the generated force of the electromagnetic converter is several g.
Since it is r, it functions as a dustproof member, but there is a problem that it does not sufficiently function as a waterproof member due to a poor sealing force of the watch case 501.

The object of the present invention is to solve the above-mentioned problems, and it is possible to generate a large output of about 1 kgr of the generated force of the converter, and for this reason, the damper is sufficient as a waterproof and dustproof member. A wristwatch with a piezoelectric tactile alarm that can function is provided.

[0006]

In order to achieve the above object, a piezoelectric tactile alarm wristwatch according to the present invention has a piezoelectric transducer having a tactile protrusion that is driven to protrude from the back cover of a watch case, and set. A wristwatch with a piezoelectric tactile alarm that directly vibrates a part of the human body at a time, wherein the piezoelectric transducer is fitted in a groove provided in the watch case,
The lever structure has a lever structure that expands expansion caused by application of a voltage to a laminated piezoelectric element that is fixed and is incorporated in the piezoelectric transducer, and the tactile protrusion has the expanded amount of the expanded laminated piezoelectric element. It is characterized in that it is arranged so as to protrude from the back lid of the case.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a plan view of a piezoelectric transducer according to the present invention, FIG. 2 is a sectional view of the piezoelectric transducer according to the present invention, and FIG. 3 is an enlarged sectional view of a tactile protrusion in FIG. Reference numeral 101 is a watch case, 102 is a piezoelectric transducer, and the piezoelectric transducer 102 includes a substrate 104, a laminated piezoelectric element 103, a hinge 201, a hinge 202, and a tactile protrusion 10.
It is composed of a lever structure having an arm 203 having eight. In addition, a plurality of holes 20 through which the tactile protrusions 108 project
5 is provided on the back cover 208 of the watch case 101,
A part 105 of the base 104 is fitted and fixed to a groove 106 (filled portion) provided on the watch case 101. Further, as shown in FIG. 3, the damper 204 is arranged between the tactile projection 108 and the back lid 208 so as to function as a vibration damper of the tactile projection 108.

Here, the groove 106 is the base 106.
Has a structure for preventing the watch from coming off from the watch case 101, and in this embodiment, as shown in FIG.
The shape of is a trapezoidal shape in which the groove width widens in the depth direction of the groove.

Since a part 105 of the base body 104 is fitted and fixed to a groove 106 (filled portion) provided on the timepiece case 101,
The spring rigidity of the laminated piezoelectric element 103 in the extension direction 107 can be increased, and the expansion enlargement ratio of the laminated piezoelectric element 103 by levering the piezoelectric transducer 102 can be calculated by changing the lengths of the hinge 201 and the hinge 202. l1, when the length of the arm 203 is l2, the ratio of l1 and l2 is l2 / l
1 and, for example, if the ratio 12/11 is 15, then 10
About 6 μ of the laminated piezoelectric element 103 when a voltage of 0 V is applied.
Even when stretched by m, the tactile protrusion 108 protrudes by about 90 μm,
Part of the human body can be vibrated directly at the set time.

On the other hand, the force generated by the laminated piezoelectric element 103 when a voltage of 100 V is applied reaches as high as about 20 kgr, and even if the force is reduced to 1/15, the force generated immediately after the protrusion of the tactile projection 108 is started. Reaches about 1kgr,
The sealing force of the watch case 101 of the damper 204 shown in FIG. 3 can be set to several hundred gr, and sufficient waterproofness and dustproofness can be imparted to the wrist watch with the piezoelectric tactile alarm of the present invention.

FIG. 4 is a plan view of another embodiment of the groove fitting portion, in which a part 405 of the base 404 is a watch case 401.
It fits into the groove 406 (filled part) provided on the
It is fixed. Here, the groove 406 shown in FIG. 4 has a structure for preventing the base 404 from coming off from the timepiece case 401, and the shape of the groove 406 of this embodiment is T-shaped. Such a T-shape is also referred to as a groove in the present application.

[0012]

As has been described above, according to the present invention, a tactile protrusion is provided to a wrist watch with a piezoelectric tactile alarm having a plurality of holes through which the tactile protrusion protrudes in a watch case. Since the vibration damper can fully function as a waterproof and dustproof member, it is waterproof and dustproof.
This has the effect of improving the reliability of the tactile alarm.

[Brief description of drawings]

FIG. 1 is a plan view of a piezoelectric transducer according to the present invention.

FIG. 2 is a sectional view of a piezoelectric transducer according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a tactile protrusion in FIG.

FIG. 4 is a plan view of another embodiment of the groove fitting portion.

FIG. 5 is a cross-sectional view of an electromagnetic transducer disclosed in the applicant's existing patent application.

[Explanation of symbols]

 104 404 Base 105 105 405 Part of Base 106 406

Claims (2)

[Claims] 1. A piezo-electric tactile alarm wristwatch having a piezo-electric transducer having a tactile protrusion that is driven to protrude from the back cover of a watch case, and directly vibrating a part of the human body at a set time. The device is fixed to the watch case, and has a lever structure that expands expansion caused by application of a voltage of the laminated piezoelectric element incorporated in the piezoelectric transducer, and the tactile protrusion is the expanded laminated piezoelectric element. A wristwatch with a piezoelectric tactile alarm, wherein the wristwatch has a piezoelectric tactile alarm and is configured to protrude from the back lid of the watch case by the amount of extension. 2. A wristwatch with a piezoelectric tactile alarm, wherein the piezoelectric transducer is fitted and fixed to a groove provided on the watch case.