JPH0723911B2 - Structure of electronic watch with solar cell - Google Patents

Description

The present invention relates to the structure of an electronic timepiece with a solar cell.

[Conventional technology]

A solar cell used in a conventional electronic timepiece with a solar cell has a solar cell layer of amorphous silicon formed on a glass substrate as in Japanese Patent Application No. 59-152559.

[Problems to be solved by the invention]

 However, the above-mentioned conventional technique has the following problems.

Since the base material is fragile glass, the glass base material must be made thick in order to prevent cracking due to disturbance during processing for forming a solar cell, handling, and after incorporation into a timepiece. Became thicker and was detracting from the product value in terms of design.

Moreover, in order to prevent cracking of the solar cell, it is necessary to hold the solar cell with a member having a cushioning means.
As a result, the wall thickness of the inner and outer diameters for displaying the outer case is increased, so that the so-called "parting portion" is not refreshed and hinders miniaturization.

Further, the cost becomes higher. In addition to the high cost of raw materials, it also has a low yield rate for cutting into individual pieces and for drilling a center hole, and it is difficult to automate the processing.

Therefore, the present invention solves such problems,
The purpose of this is to use a solar cell in which solar cells are formed by using a thin metal plate that also has a rigidity that doubles as a dial, as a base material. We are offering high quality products.

[Means for solving problems]

The structure of the electronic timepiece with a solar cell of the present invention is: a. A solar cell body in which a solar cell is formed on a thin metal base material, and an output terminal is formed on a part of the outer periphery, and the solar cell body is fixed to the center. A frame member made of a resin material having an opening portion in the portion, a solar cell power source composed of a conductive substrate laminated and fixed to the output terminal via a conductive adhesive tape and arranged around the back surface of the solar cell body; In a structure of an electronic timepiece with a solar cell, which comprises a base frame for holding a next power source, a time standard source, a circuit means, a calendar display means, etc., and an exterior means for a case or a back lid, the base frame is provided on both sides of the circumference. An outer peripheral portion of the frame member is guided to the inner shape portion of the body, the aperture portion guides one of the step portions, and the other of the step portions has an elastic portion. Is guided in the cross-sectional direction by the outer peripheral surface of the solar cell and the body. Is disposed a buffer member between the in frame the solar cell body and the frame member and the base frame is configured to be sandwiched secured by said cylinder and back pig.

b. The base frame has a pair of recesses formed in a planar outer shape, and has a step portion in the cross section of the recess portions, and the frame member has at least two hook portions having elastic portions that engage with the step portions. It has the above-mentioned dowel and is housed in the recess, and the dowel is press-fitted and fixed in a hole provided in the base frame.

c. A backup portion is provided on the body so that the conductive adhesive tape member is constantly pressed against the output terminal portion of the solar cell body via the buffer member and the conductive substrate.

d. A gap was provided in the cross-sectional direction between the solar cell body and the base frame.

e. A plurality of protrusions are provided on the outer periphery of the frame member, and the protrusions are fixed to the inside of the body by interference.

It is characterized by the above points.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, FIG. 3, and FIG. 4, reference numeral 1 denotes a solar cell body in which a solar cell 1b is formed of amorphous silicon using a thin plate of a stainless material as a base material. A conductive adhesive tape 3 (not shown in the figure because it is thin) and a film-shaped conductive substrate 2 are stacked on the output terminal portion 1a provided on the outer peripheral portion of the solar cell body 1 and are pressure-bonded so as to be conductive. The other end of the conductive substrate 2 is routed to the back side of the solar cell body 1 to enable conduction to the module. The solar cell body 1 on which the conductive substrate 2 is mounted is adhesively fixed to a frame member 4 made of a resin material to form solar cell power supply means (hereinafter referred to as a solar cell). In addition, the module has a base frame of 5
6a, 6b, 6c train wheel means for holding the pointer indicating means, electro-mechanical converting means (not shown), 7 secondary power source (using electric double layer capacitor), 8 circuit means and calendar indicating means Etc. are held and fixed. The circuit means 8 is
8 time standard sources, MOSIC chips, circuit elements, etc. (not shown)
It is formed by being mounted on a film-shaped circuit board of a, and conduction with the solar cell is guided to the base frame 5 and the frame member 4.
10 conduction springs (2) are provided on the conduction board 2 and the circuit board.
8a is interposed so as to be in pressure contact and conductive.
Further, stepped portions 5a and 5b are provided on both sides of the outer peripheral portion of the base frame 5, and the 5a is guided by an opening portion 4a provided in the frame member 4,
Further, as shown in FIG. 2, at least two dowels 4b provided on the frame member 4 are press-fitted into a guide hole 5c provided on the base frame 5 so as to be able to be fixed by interference, and are rotated in the radial direction. Positioning and fixing in the direction. The other step 5b is guided by the middle frame 11. The middle frame 11 has an elastic portion that functions in the cross-sectional direction.
11a (plurality) is provided and the body 1 constituting the exterior means
The back lid 13 is fixed to the second via the back lid packing 14, so that the back lid 13 presses the elastic portion 11a of the middle frame 11, and the elastic force of the back lid 13 presses the solar cell through the base frame 5. Is pressed and fixed to the body 12. A sheet-shaped cushioning member 15 made of a resin material is interposed between the outer periphery of the surface of the solar cell body 1 and the body 12, so that the solar cell 1b formed on the surface of the solar cell body 1b ( Insufficient strength cannot be compensated for only by the thin film layer that protects the four-division formation).
It is possible to prevent burrs and burrs of the body 12 from being caught in the solar cell 1a due to a force such as disturbance, and to prevent damage to the solar cell 1a due to cracks due to pressure of the solar cell 1a. Further, the buffer member is provided so that the conductive adhesive tape 3 which is interposed between the output terminal portion 1a provided on the outer peripheral portion of the surface of the solar cell body 1 and the conductive substrate 2 and which is conductively connected is constantly applied with pressure. A back-up portion is provided on the body 12 via 15 so that the elastic force of the elastic portion 11a of the middle frame 11 can be applied. For this reason, the backup portion is formed with a recess having a depth equal to or less than the plate thickness of the conductive substrate 2 to reduce the amount of parting gap between the case 12 and the solar cell body 1 and impair the design. I try not to.
In addition, in the cross-sectional direction of the solar cell body 1 and the base frame 5, the step size of the base frame and warpage caused by molding with a resin material, and further, the thickness dimension of the frame member 4 and the thickness of the adhesive agent, etc. A gap is provided to absorb the amount of variation. As a result, the base frame 5 pushes up the solar cell body 1 to prevent the pointer 6c from coming off and the solar battery cell 1b from deteriorating or being damaged due to a friction with the pointer 6c or a disturbance. Further, a pair of hook portions 4d having elasticity in the 12 o'clock to 6 o'clock direction of the frame member 4 are provided, and these 4d are housed in the plane space of the pair of concave portions 5d provided on the outer shape of the base frame 5, and ,
It engages with a step provided on the cross section of the recess 5d. As a result, lifting of the solar cell due to the reaction force of the conduction spring 10 is eliminated, and the pointer means 6a, 6b, 6c can be attached in a correct clearance relationship. Further, a plurality of convex portions 4c are provided on the outer periphery of the frame member 4, and the 4c are formed on the inner shape 12a of the body 12 at 6 o'clock to 12 o'clock for a clearance, and at 0 o'clock to 3 o'clock to 9 o'clock for the interference. By setting so as to fix, the module can be positioned in the radial direction, and the middle frame 11 positions and fixes only the module in the cross-sectional direction. Therefore, the dowel-eating portion 13a of the back lid 13 can be brought close to the frame member 4 so that the outer cover can be made thin.

Further, a date indicator 9 constituting a calendar display means is arranged immediately below a window hole 1c provided in the solar cell body 1 in the 3 o'clock direction.
The date letters are printed on the window so that it can be seen from the window hole 1c. If there is no calendar display means, the solar cell unit 1
By disposing the needle seat between the hour wheel 16 and the hour wheel 16 which supports the pointer display means 6c, a relatively large amount of warpage of the solar cell body 1 is absorbed, and the stability of the pointer display means is improved. ing.

〔The invention's effect〕

As described above, according to the present invention, by using a solar battery in which solar cells are formed by using a thin stainless steel plate having rigidity as a dial plate as a base material, a) a frame for adhesively fixing a solar battery body The outer peripheral portion of the member is guided to the inner shape portion of the body forming the exterior means, and the opening portion provided at the center of the frame member guides one of the step portions provided on both sides of the outer periphery of the base frame. The other step is guided by an inner frame having an elastic portion in the cross-sectional direction, and is clamped by a body and a back lid which constitute an exterior means via a cushioning member arranged on the outer peripheral surface of the solar cell body. The structure is fixed.

b) A plurality of protrusions are arranged on the outer periphery of the frame member, and the protrusions are fixed to the inside of the body by interference.

As a result, the watch, including the exterior, can be made thinner and more compact, enabling a dress-like design. Further, c) an output terminal formed on a part of the outer periphery of the solar cell body, a film-shaped conductive substrate is laminated and fixed to the output terminal via a conductive adhesive tape member, and the conductive adhesive tape member is By providing a backup portion on the body so as to be constantly pressed by the output terminal portion of the solar cell body through the cushioning member and the conductive substrate, It is possible to enhance the refreshing feeling of the section.

▲ The reliability of continuity is secured by constantly pressurizing the continuity part, and the commercial value is increased. Further, d) the base frame has a pair of recesses in a planar outer shape, and a step portion in a cross section of the recess portions, and the frame member is housed in the recess portion and engaged with the step portion. The frame member has a pair of hook portions, and at least two dowels are provided on the frame member so that the dowels can be press-fitted and fixed in the holes provided in the base frame.

e) The solar cell body and the base frame are provided with a gap in the cross section between the solar cell body and the tolerance.

As a result, the floating force of the solar cell can be suppressed by the reaction force of the conduction spring, so that the work of attaching the pointer to the regular clearance relationship can be facilitated, and further the conduction between the module and the solar cell can be achieved. In this way, it becomes possible to measure the electrical characteristics of the module in the module state.

▲ Furthermore, by providing a gap in the cross-sectional direction between the solar cell body and the base frame, the dimensional tolerance of related parts and the amount of warpage that tends to occur due to the thinness of the solar cell body are absorbed, and the solar cell based on the base frame is absorbed. It eliminates fluffiness and deformation caused by pushing up the body, and prevents scratches due to scratches with the pointer to maintain and improve appearance quality. Furthermore, the amount of strain applied to the solar cell body due to disturbance is reduced to prevent performance degradation / deterioration.

Further, by disposing the hook portion in the vicinity of the conduction spring, floating and warping of the solar cell body are effectively suppressed.

In addition to the above effects, the cost of raw materials and the processing cost are reduced, and the cracking of the solar cell body is prevented, thereby enhancing the product competitiveness and reliability.

[Brief description of drawings]

FIG. 1 is a schematic assembly sectional view showing an embodiment of the present invention.
2 is a partially assembled sectional view, FIG. 3 is an assembled plan view of a solar cell power source means showing an embodiment of the present invention, and FIG. 4 is an assembled sectional view of FIG. 1 …… Solar cell body 2 …… Conductive substrate 3 …… Conductive adhesive tape 4 …… Frame member 5 …… Base frame 10 …… Conductive spring 11 …… Middle frame 12 …… Body 13 …… Back lid 15 …… Cushioning member 16 ... Adhesive

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-42390 (JP, A) real-opening Sho 60-64294 (JP, U) real-opening Sho 60-54991 (JP, U) real-opening Sho 53- 8961 (JP, U)

Claims (5)

[Claims] 1. A solar cell body in which a solar cell is formed on a thin metal base material and an output terminal is formed on a part of an outer periphery, and a resin material to which the solar cell body is fixed and which has an opening portion in a central portion. A frame member consisting of a solar cell power source composed of a conductive substrate laminated and fixed to the output terminal via a conductive adhesive tape and arranged around the back surface of the solar cell body, a secondary power source, a time standard source, circuit means In the structure of the electronic timepiece with a solar cell, which includes a base frame that holds the calendar display means and the like, and an exterior means for the case and the back cover, the base frame is provided with step portions on both sides of the circumference, and the frame member is The outer peripheral portion is guided to the inner shape portion of the body, the opening portion guides one of the step portions, and the other of the step portions is guided in the cross-sectional direction by an inner frame having an elastic portion, A cushioning member is arranged between the outer periphery of the battery surface and the body. The solar cell body and the frame member and the base frame and the in frame structure of an electronic timepiece with solar cell, characterized by being configured to be sandwiched secured by said cylinder and back pig. 2. The base frame has a pair of recesses formed in a planar outer shape, and has a step portion in a cross section of the recess portions, and the frame member has a hook portion having an elastic portion that engages with the step portion. The solar cell according to claim 1, wherein the solar cell has at least two dowels and is housed in the recess, and the dowels are press-fitted and fixed in a hole provided in the base frame. The structure of an electronic watch. 3. A backup portion is provided on the body so that the conductive adhesive tape member is constantly pressed against the output terminal portion of the solar cell body via the buffer member and the conductive substrate. The structure of the electronic timepiece with a solar cell according to claim 1. 4. The structure of an electronic timepiece with a solar cell according to claim 1, wherein a gap is provided in a cross-sectional direction between the solar cell body and the base frame. 5. The electronic timepiece with a solar cell according to claim 1, wherein a plurality of convex portions are provided on the outer periphery of the frame member, and the convex portions are fixed to the inner shape of the body by interference. Structure.