JP2000329864A - Indicator panel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage to a solar cell caused by an indicator panel by arranging a contact prevention member between the solar cell and the indicator panel. SOLUTION: After the recessed part 31 of a solar cell 24 is engaged with a projection 30 on a movement 23 and positioned, a hook 32 of a fixing frame 25 made of a synthetic resin is inserted into a recessed part 33 of the solar cell 24 and a recessed part 34 formed on a flange of the movement 23, thereby the movement 23 and the solar cell 24 are combined and inserted into a lower shell of a case. Then, a projection 28 of a contact prevention board 27 made of a synthetic resin is engaged with a recessed part 37 formed on the upper surface of the fixing frame 25, and besides a projection 38 of a metal indicator panel 26 is interfitted thereon, to fix the contact prevention board 27 and the indicator panel 26 on the fixing frame 25. In this state, the under surface of the contact prevention board 27 is separated from the solar cell 24 as much as the thickness of a lower part of the recessed part 37 of the fixing frame 25, therefore, even if an impact is added to the indicator panel 26 in the axial direction from the outside to bend the indicator panel 26, the indicator panel 26 is not brought into direct contact with the solar cell 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel of a wristwatch having a solar cell.

[0002]

2. Description of the Related Art FIG. 17 is an exploded perspective view of the internal structure of a timepiece of a conventional wristwatch having a solar cell, and FIG. 18 is a sectional view. As shown in FIG. 18, the watch case includes a lower body 1 and an upper body 2. The internal components include a movement 3, a solar cell 4, an annular fixed frame 5, and a display panel 6.

The solar cell 4 is placed on the movement 3, and is positioned by engaging the concave portion 8 of the solar cell with the projection 7 on the movement 3. Next, the three hooks 10 hanging down from the fixed frame 5 are connected to the concave portions 1 of the solar cell 4.
1 and the movement 3 are inserted into recesses 12 cut out of flanges protruding outward. The hook 10 is hooked inside the recess 12 in the flange of the movement 3. Therefore, the solar cell 4 is sandwiched between the fixed frame 5 and the movement 3. The movement and the solar cell combined by the fixed frame 5 are inserted into the lower body 1 of the case, and the hook 10 is placed on the shoulder 13 of the lower body 1.
Next, the projections 16 of the metal display plate 6 are fitted into the two concave portions 14 formed on the upper surface of the fixed frame 5, and the display plate is mounted on the fixed frame. Further, the pointer 17 is attached, and the upper body 2, the windshield 18
Are attached via packings 20 and 21, respectively, to constitute a wristwatch. The display panel 6 has a number of holes 2 for transmitting light.
2 are formed. The display plate 6 is separated from the solar cell by the thickness of the lower part of the concave portion 14 of the fixed frame 5 and is supported so as not to hit the solar cell.

[0004]

However, when an excessive impact is applied from the outside, for example, when an axial impact is applied to the windshield 18, the display plate 6 is displaced or bent, and the solar cell 4 is displaced. The display panel may damage the solar cell upon contact with the solar cell. In particular, when the display panel is a metal plate having a hole for allowing external light to pass through, the solar cell may be broken. SUMMARY OF THE INVENTION An object of the present invention is to provide a display panel that does not cause the solar cell to be damaged by the display panel.

[0005]

According to the first aspect of the present invention,
In a wristwatch in which a light-transmitting display plate that transmits at least light in a wavelength range that contributes to power generation of the solar cell is disposed above the solar cell, the solar cell and the display plate are disposed between the solar cell and the display plate. A contact prevention member for preventing contact is provided. With this configuration, it is possible to prevent the solar cell from being damaged due to contact with the display panel.

The invention according to claim 2 is characterized in that the contact preventing member is a light transmissive member that transmits at least light in a wavelength region that contributes to power generation of the solar cell. Therefore,
The presence of the contact prevention member does not hinder the power generation of the solar cell.

The invention according to claim 3 is characterized in that the contact preventing member is a member softer than the solar cell. Even if the contact prevention member contacts the solar cell, the solar cell is not damaged or broken.

According to a fourth aspect of the present invention, the display panel has a through-hole for transmitting external light to the solar cell, and the contact preventing member has a through-hole opposed to the through-hole of the display panel. I do. Since the external light reaches the solar cell through the two through holes, the contact prevention member does not prevent the external light from reaching the solar cell. Further, even if interference fringes appear on the contact preventing member, the interference fringes are not viewed from the through holes of the display panel, so that the appearance of the display panel can be prevented from being deteriorated.

The invention according to claim 5 is characterized in that a contact preventing member is attached to the lower surface of the display panel. The danger that the contact prevention member is displaced and disengaged or twisted and plastically deformed by the applied impact can be eliminated. Also, assembly becomes easy.

The invention according to claim 6 is characterized in that the contact preventing member is colored. Various colors can be given to the appearance of the display panel.

The invention according to claim 7 is characterized in that the contact preventing member has a light emitting function. A light-emitting function can be imparted to the display panel.

The invention according to claim 9 is characterized in that a colored layer is formed on the surface of the contact preventing member. The invention according to claim 10 is characterized in that a metal thin film is formed on the surface of the contact preventing member.

The invention according to claim 11 is characterized in that the contact preventing member is a contact preventing plate. The invention according to claim 12 includes a fixed frame on which the display plate is placed, and a contact prevention plate is sandwiched between the display plate and the fixed frame. Since the contact prevention plate can be easily arranged between the solar cell and the display plate, assembly is easy.

According to a thirteenth aspect of the present invention, the protrusion protruding from the outer edge of the contact prevention plate and the recess formed in the fixed frame are engaged with each other. Even if an impact is applied from the outside, rotation and displacement of the contact prevention plate are suppressed, so that not only the contact prevention plate does not come off but also the danger of twisting and deformation can be eliminated. Thereby, the contact prevention plate is securely fixed, and the durability of the contact prevention plate is improved.

[0015]

FIG. 1 is an exploded perspective view showing an internal structure of a wristwatch according to a first embodiment of the present invention, and FIG. 2 is a sectional view. The internal components include a movement 23, a solar cell 24, an annular fixed frame 25, and a display panel 26, which is the same as a conventional timepiece, but in the present invention, the lower surface of the display panel 26 is provided with a contact prevention plate 27. Is installed.

The contact prevention plate 27 is a thin synthetic resin plate and has a pair of projections 28. Then, as in the conventional case, the solar cell 24 is placed on the movement 23 and is positioned by engaging the recess 31 of the solar cell with the projection 30 on the movement 23. Next, the three hooks 32 of the fixing frame 25 made of synthetic resin are inserted into the concave portion 33 of the solar cell 24 and the concave portion 34 cut out from the flange projecting outward from the movement 23. The hook 32 is hooked inside the concave portion 34 in the flange of the movement 23.
Further, the combination of the movement and the solar cell is inserted into the lower body 35 of the case, and the hook 32 is placed on the shoulder 36 of the lower body 35. Next, the projections 28 of the contact prevention plate 27 are engaged with the two concave portions 37 formed on the upper surface of the fixed frame 25, and the projections 38 of the metal display plate 26 are further fitted thereon. And the display board 26 are mounted on a fixed frame. The metal display plate 26 has a large number of through holes 45 for transmitting light. Attach the pointer 40,
The upper body 41 and the windshield 42 are attached via packings 43 and 44, respectively, to constitute a wristwatch.

In this state, the contact preventing plate 27 is
6 and the fixed frame 25. In this state, the lower surface of the contact prevention plate 27 is separated from the solar cell by the thickness of the lower part of the concave portion 37 of the fixed frame 25, and is supported so as not to hit the solar cell.

The contact prevention plate 27 needs to have a light transmitting property that transmits at least light in a wavelength range that contributes to the power generation of the solar cell 24. In addition, it is preferable to be made of a material softer than the solar cell. In the present embodiment, a transparent synthetic resin, for example, made of polycarbonate, having a thickness of 0.1
In addition, acrylic,
Synthetic resins such as polyacetal, ABS, polyethylene, polypropylene, polystyrene, and polyethylene terephthalate can be used. When an excessive axial impact is applied from the outside, the display plate 26 is bent and displaced toward the solar cell. However, the display panel is blocked by the intervening contact prevention plate 27 and does not directly contact the solar cell.
Therefore, the display panel does not damage the solar cell. Further, even if the intervening contact preventing plate comes into contact with the solar cell, the solar cell is softer than the solar cell, so that the solar cell is not damaged. Further, the impact of the display panel colliding with the solar cell via the contact preventing plate is absorbed by the contact preventing plate. Therefore, bending of the display panel and cracking of the solar cell are prevented. Thus, the contact prevention plate also functions as a cushioning material.

FIG. 3 to FIG. 6 are cross-sectional views of display panel portions showing modified examples. In the example of FIG. 3, the contact prevention plate 27 is bonded to the display plate 26 with an adhesive 46. The adhesive is arranged so as to avoid the through hole 45 so that the adhesive does not hinder external light reaching the solar cell. The adhesive reinforces both the display plate and the contact prevention plate. In particular, it is possible to eliminate the danger that the contact prevention plate is detached or twisted and plastically deformed due to an impact. Further, the incorporation into the fixed frame 25 becomes easy.

In the example of FIG. 4, a colored layer 47 is provided on the upper surface of the contact prevention plate 27. This colored layer is formed by printing or painting. The colored layer needs to have a light transmitting property that transmits at least light in a wavelength range that contributes to power generation of the solar cell. The color tone of the colored layer can be viewed from the through hole of the display panel, and various colors can be given to the appearance of the display panel by changing the color tone of the colored layer. Instead of the colored layer, a metal thin film may be formed by a dry plating method. By forming the metal thin film, a metallic feeling can be given, and a sense of unity with the display panel 26 can be obtained.

In the example of FIG. 5, a colored layer 48 is provided on the lower surface of the contact prevention plate 27. Thus, there is no fear that the colored layer is rubbed against the metal display panel and peeled off. In the example of FIG.
Instead of the colored layer, the contact prevention plate 27a is bonded with a colored synthetic resin. The anti-adhesion plate may be formed by applying a fluorescent paint. Further, the contact prevention plate may be formed of a synthetic resin containing fluorescent powder. The phosphor used does not matter whether it has a luminous property or a self-luminous property. The emitted light can be seen from the through hole of the display panel, so that the display panel can be easily read in a dark place, and the appearance of the display panel can be given an interesting taste.

FIG. 7 is a perspective view showing a second embodiment of the present invention, and FIG. 8 is a sectional view. In this embodiment, a through-hole 51 also serving as an indicator of 1-12 o'clock is formed in a metal display plate 50, and a through-hole formed in the contact prevention plate 52 so as to face the through-hole 51 of the display plate. 53 are formed. In the first embodiment, a part of the external light incident on the contact prevention plate is reflected by the contact prevention plate, so that the amount of light reaching the solar cell is reduced. Since the external light reaches the solar cell through the two through holes 51 and 53, the contact prevention plate cannot prevent the external light from reaching the solar cell. Further, even if interference fringes with the solar cell appear on the contact prevention plate, the interference fringes are not visible from the through holes of the display plate, so that the appearance of the display plate can be prevented from deteriorating.

FIG. 9 is a perspective view showing typesetting, FIG. 10 is a perspective view showing a state in which fixed feet for typesetting are inserted into holes of the dial, and FIG.
1 is a sectional view showing a state in which typesetting is fixed, and FIG. 12 is a sectional view of the third embodiment. Even when the metal typesetting 56 is fixed to the light-transmitting dial 55 made of synthetic resin, there is a problem that the solar cell is damaged. That is, the typesetting 56 is fixed to the display panel by inserting the fixing foot 57 into the hole 58 of the dial 55, inserting the tool 60 into the bifurcation of the foot, and expanding the bifurcation as shown in FIG. Is done.

Even if such a dial is a synthetic resin watch,
When the dial collides with the solar cell due to the impact, the dial is elastically dented, and the tip of the typesetting fixed foot 57 may hit the solar cell, and the typesetting fixed foot may damage the solar cell. Therefore, the solar cell can be prevented from being damaged by bonding the contact preventing member 61 to the lower surface of the dial 55 as shown in FIG.

FIG. 13 is a perspective view showing a window window, and FIG. 14 is a sectional view showing a fourth embodiment. The same applies to a synthetic resin dial having a decorative metal frame 65 fixed to a window for viewing the display of the date and day of the movement. As shown in FIG. 13, a hole 64 is formed in the dial 63, and a window 65 is inserted into the hole 64 and fixed to the hole 64 by press-fitting or bonding. Therefore, the planting window is fixed to the dial. By attaching the contact preventing member 67 to the lower surface of such a dial as shown in FIG. 14, the danger of damaging the solar cell by contacting the lower end of the planting window with the solar cell due to impact can be eliminated.

It is preferable that a through hole 68 is formed in the contact preventing member so as to face the window hole. This is to avoid a problem that the contact preventing member reflects external light and makes it difficult to see the date and day of the movement. In addition, the through hole of the contact prevention member needs to be formed to have substantially the same size as the outer shape of the fenestration or smaller than the fenestration. That is, if the through hole of the contact preventing member is too large, the window plant passes through the through hole and comes into contact with the solar cell.

FIG. 15 is a perspective view showing a metal ring for decoration, and FIG. 16 is a sectional view showing a fifth embodiment. An annular groove 71 is formed in a dial 70 made of synthetic resin, and a metal ring 72 is embedded in this groove. The contact prevention member 73 is also attached below the dial having such a metal decorative ring, so that the risk of damaging the solar cell can be avoided.

[0028]

According to the present invention, since the contact preventing plate is provided on the lower surface of the display panel, the solar cell is not damaged even if the display panel is deformed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an internal configuration of a wristwatch according to a first embodiment of the present invention.

FIG. 2 is a sectional view.

FIG. 3 is a sectional view of a display panel portion showing a modification.

FIG. 4 is a cross-sectional view of a display panel showing a modification.

FIG. 5 is a cross-sectional view of a display panel showing a modification.

FIG. 6 is a cross-sectional view of a display panel showing a modification.

FIG. 7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a sectional view.

FIG. 9 is a perspective view showing typesetting.

FIG. 10 is a perspective view showing a state in which fixed feet for typesetting are inserted into holes of the display panel.

FIG. 11 is a sectional view showing a state in which typesetting is fixed.

FIG. 12 is a cross-sectional view of the third embodiment.

FIG. 13 is a perspective view showing a planting window.

FIG. 14 is a sectional view showing a fourth embodiment.

FIG. 15 is a perspective view showing a metal ring for decoration.

FIG. 16 is a sectional view showing a fifth embodiment.

FIG. 17 is an exploded perspective view of a timepiece internal component of a conventional wristwatch having a solar cell.

FIG. 18 is a sectional view.

[Explanation of symbols]

 Reference Signs List 1 lower torso 2 upper torso 3 movement 4 solar cell 5 annular fixed frame 6 display plate 7 protrusion 8 recess 10 hook 11 and 12 recess 13 shoulder 14 recess 16 protrusion 17 pointer 18 windshield 20, 21 packing 22 hole 23 movement 24 solar cell 25 annular fixed frame 26 display plate 27, 27a contact prevention plate 28, 30 protrusion 31 recess 32 hook 33, 34 recess 35 lower body 36 shoulder 37 recess 38 protrusion 40 pointer 41 upper body 42 windshield 43, 44 packing 45 through hole 46 Adhesives 47, 48 Colored layer 50 Display plate 51 Through hole 52 Contact prevention plate 53 Through hole 55 Dial 56 Typesetting 57 Fixed foot 58 Hole 60 Tool 61 Contact prevention member 63 Character plate 64 Hole 65 Planting window 66 Projection 67 Contact prevention member 68 Through hole 70 Dial 71 Groove 72 Metal ring 73 Contact Preventing member

Claims (13)

[Claims] 1. A wristwatch in which a light-transmitting display plate that transmits at least light in a wavelength range that contributes to power generation of the solar cell is disposed above the solar cell, wherein the solar cell is disposed between the solar cell and the display plate. A display panel structure, comprising a contact preventing member for preventing contact between the panel and the display panel. 2. The display panel structure according to claim 1, wherein the contact preventing member is a light transmissive member that transmits at least light in a wavelength range that contributes to power generation of the solar cell. 3. The display panel structure according to claim 1, wherein the contact preventing member is a member softer than a solar cell. 4. The display panel structure according to claim 1, wherein the display panel has a through hole for passing external light to the solar cell, and the contact preventing member has a through hole facing the through hole of the display panel. . 5. The display panel structure according to claim 1, wherein a contact prevention member is attached to a lower surface of the display panel. 6. The display panel structure according to claim 1, wherein the contact prevention member is colored. 7. The display panel structure according to claim 1, wherein the contact prevention member has a light emitting function. 8. The display panel structure according to claim 1, wherein the display panel partially includes a member harder than the solar cell. 9. The display panel structure according to claim 1, wherein a colored layer is formed on a surface of the contact preventing member. 10. The display panel structure according to claim 1, wherein a metal thin film is formed on a surface of the contact preventing member. 11. The display panel structure according to claim 1, wherein the contact preventing member is a contact preventing plate. 12. The display device according to claim 1, further comprising a fixed frame on which the display plate is placed, wherein a contact prevention plate is sandwiched between the display plate and the fixed frame.
2. The display plate structure according to 1. 13. The display plate structure according to claim 11, wherein a projection protruding from an outer edge of the contact prevention plate and a recess formed in the fixed frame are engaged.