JPH11223679A - Equipment carried on arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment carried on arm having high power generation efficiency by cutting off an unintended intrusion of heat from the heat radiating part of a thermoelectric generator by forming a heat insulating cubic pattern on the surfaces of glass covering the upper end side of the hollow part, the glass edge to hold this and a heat radiating outer body heat-conductively fitted to the glass edge. SOLUTION: A thermoelectric generator 6 is constituted of plural thermal power generation elements 6a, a heat radiating plate 6c and a heat receiving plate 6b to sandwich them from above and below to generate prescribed electric energy. Glass 2 is formed of sapphire glass having excellent heat conductivity, a reverse cover 5 is formed of metal such as Ti, the glass edge 3 is formed of an alloy such as Al having high heat conductivity, and an inner body 4A is formed of plastic having low heat conductivity, respectively. A heat radiating outer body 4B composed of a construction material having high heat conductivity is fitted to the upper surface of the inner body 4A in a heat conductive state with the glass edge 3. A heat insulating cubic pattern 8 composed of a heat insulating material is formed on the surface of the part having a danger that the human body carelessly contacts with a heat source such as the glass 2, the glass edge 3 and the heat radiating outer body 4B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrist portable device such as a wristwatch provided with a thermoelectric generator.

[0002]

2. Description of the Related Art Electronic wristwatches are now the mainstream for wrist portable devices, for example, wristwatches, and silver batteries or lithium batteries are used as power sources. However, since these batteries are consumables, they need not only to be replaced regularly, but also consume the limited resources of the earth, and have the problems of polluting the environment by disposal. Therefore, as an alternative, a wristwatch having a power generation mechanism inside has been studied. As the power generation method, for example, a solar cell that converts light energy, mechanical power generation using gravitational energy, or thermoelectric power generation using the Seebeck effect due to a temperature difference are known. Is already in practical use. On the other hand, the thermoelectric power generation method has been known in principle for a long time, as disclosed in Japanese Patent Publication No. Hei 2-13279, but has not yet reached the level of practical use. Is being done.

[0003]

SUMMARY OF THE INVENTION In a wrist portable device,
When the thermoelectric generation method is used, a temperature difference between a body temperature (high-temperature portion) transmitted to the wrist portable device via the arm and a temperature of the air around the wrist portable device (low-temperature portion) is used. However, in conventional portable devices, the thermal conductivity from the high-temperature part to the heat-receiving part of the thermoelectric generator and the thermal conductivity from the heat-dissipating part of the thermoelectric generator to the low-temperature part are problematic. The temperature difference was not sufficient for the machine to generate the required electrical energy. In particular, the heat radiation efficiency from the wrist portable device to the outside air (low temperature portion) greatly changes depending on the wearing state of the wrist portable device, for example, when a part of the body is in contact with the heat radiation side, the heat is not dissipated. Not only that, there was also a problem that heat was absorbed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it has been proposed to provide a wrist portable device having high power generation efficiency by preventing undesired heat from entering from a heat radiating portion of a thermoelectric generator. The purpose is to provide.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, there is also a disclosure example described in Japanese Patent Publication No. Hei 2-13279, but the point of thermal power generation is to take in a lot of heat below and how to radiate heat. However, in an actual mobile phone, heat does not necessarily come from the back cover, but also comes in through heat contact and radiation from parts such as glass, a glass edge, and a body, which should be a heat radiation part. According to the present invention, the reverse intrusion of heat from the radiator is prevented by providing a guard for preventing undesired thermal contact.

The present invention relates to a wrist portable device having a thermoelectric generator having a heat receiving section and a heat radiating section, and generating a predetermined electric energy based on a temperature difference generated between the heat receiving section and the heat radiating section. An inner trunk having a hollow portion penetrating in the up-down direction, made of a material having low thermal conductivity, a back cover covering a lower end side of the hollow portion, a glass covering an upper end side of the hollow portion, and an edge of the glass A heat radiating plate (heat radiating plate) made of a material having high heat conductivity formed on the held glass rim and the upper surface of the inner body in a state where the glass rim is heat-conductively fitted or integrally formed with the glass rim. Outer body) is disposed, and at least one surface of the glass, the glass edge, and the heat radiation outer body,
The heat insulating three-dimensional pattern made of a material having low thermal conductivity was formed.

According to the present invention, the heat from the arm is conducted to the heat receiving portion of the thermoelectric generator through the back cover to generate electric power, and then the glass / glass edge and the outer body integrated with the glass edge are applied to the outer shell. Heat is transferred. The conducted heat is radiated into the air from the glass-glass edge and the outer surface of the outer shell integrated with the glass edge. However, if the glass body or the outer body is inadvertently brought into contact with the human body or another heat source, not only is heat dissipation not performed, but also heat is absorbed and power generation is not performed. According to the present invention, the careless thermal contact is prevented by the heat dissipation guard film.

On the other hand, the heat from the heat radiating portion is radiated to the outside air through the mesh, the stripe gap, and the heat radiating hole of the heat radiating guard film. Therefore, even if a hand or the like carelessly touches the heat radiating portion of the wrist portable device, heat can be radiated from the heat radiating portion of the thermoelectric generator, and power generation can be maintained. Here, examples of the wrist portable device include electronic devices such as a wristwatch and a pager.

As a material having a low thermal conductivity for use in the inner body, for example, a plastic having a thermal conductivity of 1 W / (m · ° C.) or less is most suitable.
Metals such as SUS (stainless steel) and Ti in the vicinity of 20 W / (m · ° C.) can be adopted if other conditions such as the performance of the generator and the heat radiation performance of the heat radiation outer shell are good.

As the material having high thermal conductivity used for the heat radiation outer shell, for example, metals such as Au, Ag, Cu, and Al having a thermal conductivity of about 200 to 400 W / (m · ° C.) are most suitable. However, copper alloys such as Bs having a thermal conductivity of 100 W / (m · ° C.) or more can be adopted if the conditions are good.

Further, as a material to be used for the heat insulating three-dimensional pattern, a heat insulating material such as a hard urethane foam having a heat conductivity of around 0.03 W / (m · ° C.) is most suitable. Resin paints and rubbers with a rate of around 0.3 W / (m · ° C) are also practical.

[0012] Further, the invention provides the heat insulation three-dimensional pattern,
A film surface having a plurality of modeling holes in which a line drawing such as a stripe or a wavy line, or a shape surrounded by a straight line or a curve was formed and arranged.

According to the present invention, by effectively drawing a three-dimensional pattern, it is possible to prevent a hand or the like from contacting at a pattern line (or surface) portion, and to radiate heat from the other exposed portion of the cloth. And design-like development is also possible.

Here, as a material used for the heat insulating three-dimensional pattern, a material such as a urethane resin paint or a photocurable resin having a low thermal conductivity for drawing the pattern in close contact with the cloth is used.

[0015] Still further, according to the present invention, the heat insulating three-dimensional pattern comprises:
The fabric surface having an area of 50% or more of the pattern area is exposed by the mesh or the forming hole.

Originally, the smaller the pattern surface, the better.
For this purpose, the narrower the line width of the line drawing and the coarser the mesh, the better.
However, when the mesh becomes coarse, the danger of the fingertip or the like coming into contact with the fabric increases. For this reason, in the present invention, the danger of contact is avoided by setting the line height (thickness) of the line drawing sufficiently for the size of the mesh.

Image height (film thickness) with respect to the minimum mesh width
Although it will be described later, it is desirable to keep the height at half or less of the tip width from the viewpoint of avoiding catching, peeling and dirt.

The line width is 0.5 mm in consideration of the adhesion to the cloth.
The above is desirable. Considering the pattern outer contour, about 30% is covered in the case of a mesh, and 30 to 50% is covered in the case of a shaping hole. Even if the performance of the generator is improved, at least 50% or more of the cloth must be exposed.

Further, the present invention is configured such that a film made of a material having low thermal conductivity is formed on the surface of the heat radiation plate, and a heat radiation hole is formed in the film.

According to the present invention, on the surface of the heat radiation plate,
A film made of a material having low thermal conductivity is formed, and the film includes
Since the heat radiating holes are formed, the heat radiating plate can radiate heat from the heat radiating holes, and the film is in a state where contact with a hand or the like is blocked. Here, examples of the material having low thermal conductivity include a heat insulating material and a resin material.

Further, according to the present invention, since the heat radiation guard film has a three-dimensional pattern formed of a transparent resin or a vitreous coating, the guard film is hardly visible in appearance, so that it has the same texture as a conventional portable device. Can be provided. In addition, it is possible to develop designs and colors without being aware of the heat radiation guard.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the wrist portable device according to the present invention will be described with reference to FIGS.

[First Embodiment] FIG. 1 is a sectional view of a wristwatch exemplified as a first embodiment of a wrist portable device according to the present invention, and FIG. 2 shows a heat radiation guard film. ,
(A) Line drawing, (b) is a heat dissipation hole. FIG. 3 is a diagram illustrating a relationship between a guard film (or a line) and an exposed surface. FIG.
It is sectional drawing which shows the modification of the wristwatch of FIG.

1 and 4, 1 is a movement, 2 is a glass, 3 is a glass edge, 4A is an inner body, 4B is a radiating outer body, 5 is a back cover, 6 is a thermoelectric generator, and 7 is a heat conducting plate. , 8
Is a heat radiation guard film, 11 is a needle, 12 is a dial, 13 and 1
4 is a middle frame, 31 is a packing, 50 is a heat insulating space.

The thermoelectric generator 6 has a plurality (for example, 10
), And a ring-shaped radiator plate 6c and a heat receiving plate 6b sandwiching the thermoelectric generators 6a,. The thermoelectric generator 6 includes a heat receiving plate 6b
A predetermined electric energy is generated by the Seebeck effect using the temperature difference between the (high-temperature portion) and the radiator plate 6c (low-temperature portion). In the thermoelectric generator 6, the end face on the heat receiving plate 6b side is fixed to the back cover 5, while the end face on the heat radiating plate 6c side is fixed to the heat conducting plate 7 (for example, Cu or the like).

The glass 2 is formed in a substantially disk shape from, for example, sapphire glass having good thermal conductivity, heat-absorbing glass, or the like, and the peripheral edge thereof is fixed to the inner peripheral upper end of the glass edge 3. .

The back cover 5 is formed in a disc shape with a metal such as Ti or SUS, for example.
A is fixed to the bottom surface. On the inner surface of the back cover 5 (the surface on the movement 1 side), in order to enhance thermal conductivity, Cu
It is plated (or a Cu thin plate is clad).

The glass rim 3 has a high thermal conductivity, for example,
It is formed in a substantially cylindrical shape by a metal such as a copper alloy such as Al and BS, and is fixed to the inner body 4 </ b> A via a gasket 31. In addition, the lower end surface 3b and the inner peripheral surface of the glass rim 3 are plated with Cu or the like in order to enhance thermal conductivity, and the surfaces in contact with the housing space 4c and the inner frame 13 are provided with a A heat insulating material is applied to the surface (from above the Cu plating).

The inner body 4A is made of, for example, plastic having a low thermal conductivity. This inner trunk 4A is
A housing space for housing the movement 1, the glass rim 3, the thermoelectric generator 6, and the like is formed therein. A heat-dissipating outer shell 4B made of a material having a high thermal conductivity is attached to the upper surface of the inner shell 4A so as to be fitted to the glass rim 3 in a heat-conducting state so as to cover the upper surface. ing.

The radiating outer shell 4B has a high thermal conductivity, for example, Au, Ag, Cu, Al having a thermal conductivity of about 200 to 400 W / (m · ° C.).
An opening for exposing the upper end surfaces of the glass 2 and the glass rim 3 is formed at the center thereof. "The heat-radiating outer shell 4B is attached to the upper surface of the inner shell 4A in a state where a space 50 is arranged, so that the transfer of heat between both members is suppressed. The space 50 The heat-radiating outer shell 4B is heat-insulated by the upper end of the inner shell 4A and the gasket 31 and is sandwiched between the glass rim 3 and the lower end of the heat-radiating outer shell 4B. The outer periphery of the body 4A is engaged with the upper end.

At least one of the surfaces of the glass 2, the glass edge 3, the heat radiation outer body 4B, etc., which may inadvertently come into contact with a heat source such as a human body, has a low heat conductivity such as a heat insulating material or resin. Is formed. As a material with low thermal conductivity, thermal conductivity 1W / (m ・ ℃)
The following plastics and heat insulating materials are adhered by printing or painting.

As shown in FIGS. 2 (a) and 2 (b), the heat radiation guard film 8 is formed of a line drawing 8A of a three-dimensional pattern such as a mesh, a stripe, a wavy line or the like by a heat insulating material. Or Figure 2
As shown in (c), a heat radiation hole 8 having a shape surrounded by straight lines or curves is formed on a pattern film surface 8A formed of one surface of a heat insulating material.
B. . . Are designed and arranged on one side.

As shown in FIG. 3, a heat insulating material (or a resin material having low thermal conductivity) is applied (or printed) to the exposed surface of the heat radiating outer body 4B, and has a predetermined thickness (for example, as shown in FIG. 3). , 0.
1 to 1 mm). In the state where the heat insulating material is applied in this way, the heat radiating outer body 4B can radiate heat from the exposed portions (heat radiating holes 8B,. The contact is blocked.

Originally, the smaller the film 8A, the better.
For this purpose, it is better that the line width W of the line drawing is narrow and the mesh is coarse. However, when the mesh becomes coarse, the danger of the fingertip or the like coming into contact with the fabric increases. In this embodiment, the danger of contact is avoided by sufficiently setting the line height (thickness) t of the line drawing to the size L of the mesh.

Image height (film thickness) with respect to the minimum mesh width L
t is approximately as follows. (Unit: 1/100 mm) Image height (film thickness) t 0.1 0.2 0.3 0.4 0.5 Mesh width L 2.5 3.6 4.5 5.3 5.9 Image Line height (film thickness) t 0.6 0.7 0.8 0.9 Network width L 6.5 7.0 7.5 8.5 8.8 The stitch width is different when the major and minor diameters are different or when stripes are used. Is the average L = (major axis L1 + minor axis L2) / 2. Actually, conditions change depending on the design, so that it is possible to find better conditions by deciding while confirming the actual thing.

The line width W is 0.5 m in consideration of the adhesion to the cloth.
m or more is desirable. Considering the pattern outer contour, about 30% is covered in the case of a mesh, and 30 to 50% is covered in the case of a shaping hole.
Even if the performance of the generator is improved, at least 50% or more of the cloth must be exposed.

The film 8A may cover the upper end surface of the glass rim 3 or the glass 2 as shown in FIG. 4, for example. By doing so, for example, contact with the upper end surface of the glass rim 3 by a hand or the like is prevented.

As described above, according to the wristwatch of this embodiment, the heat radiating portion 6c of the thermoelectric generator 6 is
On the other hand, the heat receiving portion 6b is connected to the back cover 5 so as to be able to conduct heat, and the heat energy from the arm is transferred to the back cover 5 → the heat generator 6 → the heat conducting plate 7 → the glass rim 3 / radiation outer shell 4B and the glass. The heat is radiated to the atmosphere through the exposed surface of the cloth, that is, the heat radiation hole 8B.

On the other hand, the heat radiating outer body 4B has a plurality of heat radiating holes 8b.
Is covered with the heat radiation guard film 8 </ b> A having heat dissipation, so that heat conduction due to contact with a hand or the like can be blocked.
That is, it is possible to prevent a problem that heat is conducted to the heat radiation outer body 4B due to contact with a hand or the like and power generation is not performed.

Further, by effectively drawing a three-dimensional pattern, it is possible to prevent contact with a hand or the like at a pattern line (or surface) part, and to radiate heat from other exposed parts of the cloth. And design-like development is also possible.

[Second Embodiment] FIG. 4 is a sectional view of a wristwatch exemplified as a second embodiment of the wrist portable device according to the present invention. In this embodiment, as shown in the figure, the heat radiation outer shell 4B is configured to be integrated with the glass edge 3. (A) is a form example in which the heat radiation outer shell and glass in the first embodiment are simply integrated. (B) and (c) are embodiments of the embodiment in which the method of engaging the heat radiating outer body and the inner body and the method of attaching the band in the embodiment of FIG. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

It should be noted that the present invention is not limited to the wristwatches of the respective embodiments, but can be applied to other electronic devices such as wristwatches and pagers. In addition, the detailed configurations, methods, and the like specifically shown can be changed without departing from the gist of the invention.

[0043]

【The invention's effect】

According to the present invention, a film made of a material having low thermal conductivity is formed on the surface of the heat radiating outer shell, and the heat radiating hole is formed in the film. Heat can be radiated from the holes, and the film blocks the contact with, for example, a hand. Therefore, it is possible to prevent a problem that a part of the body comes into contact and heat is conducted to the heat radiation outer body.

Further, since the heat radiation guard is thin and closely adhered, it can be applied to a small decorative watch. Also, since the pattern can be easily applied by printing or the like, the design can be easily developed.

In addition, since the guard film can be made transparent, the heat radiation guard is not conspicuous, and the degree of freedom of danger increases.

[Brief description of the drawings]

FIG. 1 is a sectional view of a wristwatch exemplified as a first embodiment of a wrist portable device according to the present invention.

FIG. 2 shows a heat radiation guard film.
(b) is a line drawing type, and (c) is a radiating hole type.

FIG. 3 is an explanatory diagram showing a relationship between a film portion and an exposed portion in FIG. 2;

FIG. 4 is a sectional view of a wristwatch exemplified as a second embodiment (a), (b), and (c) of the wrist portable device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movement 2 Glass 3 Glass rim 4A Inner body 4B Heat radiating outer body 5 Back cover 6 Thermoelectric generator 6a Thermoelectric generator 6b Heat receiving plate 6c Heat radiating plate 7 Heat conducting plate 8 Heat radiating guard film 8A Pattern film surface of heat radiating guard film 8B Heat radiating guard Heat radiating hole of membrane 43 Glass edge of heat radiating outer body in case of integral body

Claims (5)

[Claims] 1. A wrist portable device having a thermoelectric generator for generating electric energy by a temperature difference generated between a heat receiving portion and a heat radiating portion, comprising a hollow portion vertically penetrating, An inner body made of a low material, a back cover covering a lower end side of the hollow portion, glass disposed on an upper end side of the hollow portion, a glass edge holding an edge of the glass, and an upper surface of the inner body. A heat-dissipating outer shell made of a material having high thermal conductivity, which is fitted with the glass edge in a state capable of conducting heat, or formed integrally with the glass edge, and The wrist portable device according to claim 1, wherein a heat insulating three-dimensional pattern made of a material having low thermal conductivity is formed on at least one surface of the trunk. 2. The heat-insulating three-dimensional pattern is a film surface having a line drawing such as a mesh, a stripe, a wavy line, or a plurality of modeling holes in which shapes surrounded by straight lines or curves are arranged in a modeling manner. The wrist portable device according to claim 1. 3. The heat insulating three-dimensional pattern is 50% of a pattern area.
The wrist portable device according to claim 2, wherein the fabric surface having the above area is exposed by a mesh or a shaping hole. 4. The wrist portable device according to claim 1, wherein the heat-insulating three-dimensional pattern is adhered to the surface of the fabric by printing, painting, electrodeposition painting, injection molding, stereolithography, or the like. 5. The film made of a material having low thermal conductivity,
The wrist portable device according to claim 1, wherein the wrist portable device is a transparent resin.