JPH0710319Y2 - Watch structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to the structure of a wristwatch in which each element of the timepiece is arranged up to the band portion of the wristwatch.

[Conventional technology]

With the remarkable improvement of electronic technology in recent years, even in the field of wristwatches, the wrist information device is changing to not only the time display but also various information. By increasing the information to be transmitted, the number of batteries that are energy sources will increase
Furthermore, it is necessary to use a large size and high capacity battery, and a wide display section, a wide operation section to prevent complication of operations, a speaker for improving voice information, a microphone, and a high capacity memory are possible. It has become necessary to mount each circuit element such as a large circuit space, etc. on the wristwatch. However, according to the general structure of a conventional wristwatch, in the structure in which the side for accommodating each element of the above-mentioned timepiece movement and the band part for the purpose of mounting are separate bodies, the side part becomes very large. It is very difficult to attach to the watch, and when trying to store all the watch movements in the side size of the conventional level, not only is it very thick due to the overlapping of each element, but also because of the small surface area It is very difficult to provide a display unit, a wide operation unit, and the like.

As means for solving these problems, many proposals have been made to eliminate the distinction between the side portion and the band portion, form a body portion in the conventional band portion, and disassemble and store the above-mentioned timepiece elements into pieces.

However, in order to improve the deviceability to the arm, it is necessary to give flexibility between the body parts that house the elements and to fit the shape of the arm part.

As a means for this, as proposed in Japanese Utility Model Laid-Open No. 62-81088, a flexible circuit board is arranged between the inner barrels to electrically connect the elements between the inner barrels. A structure covered with a flexible soft resin has been proposed.

[Problems to be solved by the device]

However, a flexible circuit board is a flexible resin sheet of an insulator provided with a conductive metal such as copper or gold or a thin film of carbon as a conductive pattern. It is difficult for the material to break during mechanical pulling and bending, but it is prone to breakage due to repeated use and problems such as wire breakage. Covering the sheet-shaped flexible circuit board with resin is insert molding as a processing method, and the pressure applied to the circuit board depends on the resin pressure at the time of molding, either up or down depending on the resin flow direction. Due to the difference between the two, it is biased to either side, and it is very difficult to mold at the prescribed position that is originally required.

It is an object of the present invention to provide a reliable structure for a flexible circuit board, particularly for repeating, and a shape of the flexible circuit board that facilitates processing of the structure, in order to remedy the aforementioned drawbacks.

[Means for Solving the Problems]

In order to achieve the above object, the structure of the present invention is to provide an inner case for accommodating each element of the timepiece separately, and to electrically connect each element accommodated in the inner case by a flexible circuit board. A curl-shaped slack portion is formed in the connection portion between the inner trunk portions of the flexible circuit board, and a plurality of openings are formed in the vicinity of the slack portion of the flexible circuit board at a position avoiding the conduction pattern. There is a section.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of the essential parts of the completed timepiece of the embodiment of the present invention, and FIG.
FIG. 3 is a sectional view of an essential part of a timepiece according to an embodiment of the present invention, and FIG. 3 is a sectional view of an essential part showing a state where the timepiece according to the embodiment of the present invention is mounted on an arm.

Further, FIG. 4 is a perspective view showing a molding process state of the flexible circuit board and the soft resin in the connection portion between the inner shells of the embodiment of the present invention.

In FIGS. 1 to 3, reference numerals 3 to 7 denote inner cylinders for housing respective timepiece elements, and an inner cylinder (I) 3 is a crystal.
14, an inner case that houses a liquid crystal display element 16, a conductive connector 17, and the like, a composite circuit that forms a circuit portion in which electronic components such as a circuit chip 15 and the like are mounted on the circuit board 13.

The inner case (II) 4 is an inner case that accommodates a switch plate 18 that is a timepiece operation member.

The inner case (III) 5 is an inner case that houses the hour hand 21, the minute hand 22, the pointer movement 19 for displaying the time on the dial 20, and the windshield 23.

The inner body (IV) 6 is an inner body that houses a sounding body including a diaphragm 24, a piezoelectric element 25, a buzzer contact spring 26, and the like.

The inner body (V) 7 is an inner body that houses the battery 27, the (+) lead plate 28, and the (−) lead plate 29.

The flexible circuit board 2 (hereinafter abbreviated as FPC) that electrically connects each element between each inner body is an inner body (I) 3
Are connected to the circuit board 13 of the composite circuit housed in, and each of the necessary signals is conducted to each element.

The FPC 2 forms a curled relaxation portion 2a between the inner trunks, and the relaxation portion 2a has a chevron shape forming an outer convex portion. Then, it is formed so as to cover each inner case and the FPC 2 in the middle part of the inner case with a soft resin 1 such as urethane resin.

At the connecting part of each inner body, follow the relaxation part 2a of FPC2.
One lower recess 1a and two upper recesses 1b are provided.

This improves the flexibility of the connection part of each inner torso, makes it easy to attach it to the arm, and at the same time acts so that bending stress does not act on FPC 2 as much as possible even if it is repeatedly attached and detached. Furthermore, even if external stress such as tension or twist is applied between the inner shells, the relaxed portion 2a directly pulls the FPC2 without the external force of twist.
Has the effect of avoiding breakage and destruction.

More specifically, FIG. 3 is a sectional view showing a state in which the wristwatch of the present invention is mounted near the ankle of the arm. Since the connecting portion of each inner case accommodating each element of the above-mentioned timepiece is made of only the soft resin 1 and the FPC2, it has flexibility and is fitted and fitted to the arm as shown in FIG.

The lower concave portion 1a of the connecting portion of each inner body has its groove width reduced to form an upper concave portion.
It is shown that the groove width of 1b is enlarged.

Since the relaxed portion 2a of the FPC 2 is integrally molded in a curl shape in the vicinity of the center of the cross section of the inner trunk connecting portion sandwiched between the upper and lower recesses, it is not deformed under the same conditions as a short straight FPC without a curl shape. By comparison, the internal stress applied to the FPC2 of the relaxed portion 2a is obviously small, and it is possible to expect improvement in its durability.

As described above, the inner case 3 to 7 for housing each element of the timepiece
FPC2 is inserted in an appropriate position, and the side band is made into an integral structure by integrally molding with the soft resin 1, then the necessary watch elements are incorporated, and each back cover 8-11 is welded to the inner case 3-6. By incorporating the battery hatch 12 into the inner case 7, the wristwatch of the present invention is completed.

FIG. 4 is a perspective view showing a state in which the soft resin 1 and the FPC 2 at the connecting portion between the inner shells are molded.

As shown in the figure, the FPC2 is formed in a curl shape to hold the loosened portion 2a at the inner body connecting portion, but the soft resin 1 filling the connecting portion blows up the FPC2 from the lower portion as shown by the arrow in the figure. Flow in the direction, pressure unevenness occurs above and below the FPC2,
It was difficult to hold the FPC 2 in the desired position and shape, and it was not possible to perform the prescribed molding that requires the curled loose portion 2a.

In the wristwatch of the present invention, as shown in the figure, the conduction pattern of FPC2
By providing an oval hole 2c that is in parallel with the conduction pattern 2b at a position that avoids 2b and avoiding the pressure difference that occurs at the top and bottom of the FPC2 during molding as much as possible, the desired curl shape is maintained. It became possible to seal the FPC2 in the soft resin 1.

[Effect of device]

As is clear from the above description, according to the present invention, in the structure of a wristwatch that accommodates multiple elements as an arm information device, which is one form of a future wristwatch, each of the elements can be used as a method of storing a timepiece element in a band portion. A flexible circuit board that provides electrical continuity between the torso is arranged, and a curl-shaped relaxing portion is provided on the flexible circuit board when the connecting portion of each inner torso has flexibility to fit the arm. By forming the flexible circuit board, its strength, durability, and flexibility are enhanced, and by providing the flexible circuit board with an opening portion, the flow of the soft resin is facilitated and the flexible circuit board is formed into a desired curled shape. Achieving the effect of increasing the flexibility of the flexible circuit board as well as sealing, the wrist structure with arm type and separate element is possible.

[Brief description of drawings]

FIG. 1 is a plan view of the essential parts of the completed timepiece of the embodiment of the present invention, and FIG.
FIG. 3 is a sectional view of an essential part of a timepiece according to an embodiment of the present invention. FIG. 3 is a sectional view of an essential part of the timepiece according to the embodiment of the present invention mounted on an arm.
FIG. 4 is a perspective view showing a state of the flexible circuit board and the soft resin at the connection portion between the inner shells of the embodiment of the present invention. 1 ... Soft resin, 2 ... Flexible circuit board, 3 ... Inner body (I), 4 ... Inner body (II), 5 ... Inner body (III), 6 ...
… Inner body (IV), 7… Inner body (V), 8-11 …… Back cover, 12
…… Battery hatch, 13 …… Circuit board, 14 …… Crystal, 15 ……
Circuit chip, 16 ... Liquid crystal display element, 17 ... Conductive connector, 18 ... Switch plate, 19 ... Movement, 20 ... Dial, 21 ... Hour hand, 22 ... Minute hand, 23 ... Windshield, 24 ... … Vibration plate, 25 …… Piezoelectric element, 26 …… Buzzer contact spring, 27 ……
Battery, 28 …… (+) lead plate, 29 …… (−) lead plate,
30 …… Arm section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-120972 (JP, A) JP-A-58-42987 (JP, A) Actually open Sho-57-86492 (JP, U) Actual-open Sho-62- 81088 (JP, U) Actually opened 57-170087 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A plurality of inner barrels for individually housing respective elements for a clock, such as a circuit portion on which a chip or the like is mounted, a movement for displaying time, an external operating portion, etc., and each element accommodated in the inner barrel. In a wristwatch integrally formed of a flexible soft resin so that the inner circuit board and the circuit board of each of the above are electrically connected, A slack portion is formed on the flexible circuit board disposed in the connection portion between the inner shells, and a plurality of opening portions are provided near the slack portion of the flexible circuit board at a position avoiding a conduction pattern. The structure of the wristwatch characterized by that.