JPH1032499A - Micro light-weight electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide armoring intensity which is proof against a strike by the bill of a bird and a transmission function and to reduce cost with a simple process by filling a foaming member and a coating layer in electronic parts and an antenna with a protection cover and making a through part to be a waterproof structure. SOLUTION: An electronic member 4 constituted of the electronic parts 2 and a battery 3 is provided on a disk 1. The electronic parts 2 and the antenna 5 with the protection cover 6 are filled with the coating layer 11 constituted of the metallic conductive layer 9 and an insulating layer 10, which are provided for the periphery. The antenna 5 with the protection cover 6 protrudes to the outside of the coating layer 11 and it has the transmission function. A water insulating part 19 is provided for a through hole. The micro light- weight electronic unit has a form that can be fitted to the back of the medium migratory bird. At the same time, it has weight which does not give excessive load to the bird and water proof structure into which water does not invade inside. An electromagnet shielding structure required for maintaining the transmission function and armoring intensity proof against the strike by the bill of the bird are provided. Then, cost can be reduced by the simple process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultra-compact and lightweight electronic device, and more particularly to an electronic device having excellent strength, waterproofness, and electromagnetic wave shielding.
The present invention relates to an ultra-compact and lightweight electronic device that can be used as a transmitter for a medium-sized migratory bird.

[0002]

2. Description of the Related Art In recent years, in the field of electronic devices such as personal computers (hereinafter, referred to as personal computers), cassette tape recorders, telephones, etc., the transition from the conventional heavy, large, and large to light, light, short, and small has been rapidly advanced. ing. Along with this, development of small and light electronic devices such as notebook personal computers and mobile phones has been performed.

Normally, these electronic devices are configured by covering components such as electronic components and batteries with a housing cover made of plastic or metal. With this configuration, for example, a mobile phone achieves a weight of 100 g, which is considered to be the limit at which a person does not feel heavy as a portable device.

On the other hand, as a part of migratory bird protection activities, which are in danger of extinction in recent years, a small transmitter is attached to the back of the migratory bird, and the route of the migratory bird is tracked by a communication satellite.
Attempts have been made internationally to investigate resting and nesting sites along the way.

[0005] Such a transmitter needs to satisfy the following requirements.

(1) To reduce the weight load on birds, the weight is reduced to about several tens g.

(2) A waterproof structure is provided to prevent water from entering the internal electronic parts.

[0008] (3) The exterior has strength so that it is not destroyed by hitting with a bird's beak.

(4) An electromagnetic wave shielding structure is used to maintain the transmission function.

(5) To fix the transmitter to the bird's body, the exterior has a sufficient adhesive function.

[0011] Of these requirements, (1) ultra-light weight is the most important task to be achieved.

FIG. 22 shows a configuration example of a conventional migratory bird transmitter.
Shown in The transmitters shown in this example are a base 101 and a base 10
An electronic member 104 composed of various electronic components 102 and a battery 103 mounted on one, an antenna 105 having one end fixed to the base 101, a ground wire 106 having one end connected to the base 101, and these members. And a protective cover 110 sealed therein. Also, the protective cover 110
A shielding member 111 is provided on an antenna protruding portion from the antenna.

The protective cover 110 is composed of an upper case 108 and a lower case 107 made of plastic and is integrated by bonding with an adhesive 112.
As the plastic for the protective cover 110, polycarbonate, polyethylene terephthalate, or the like is used. The electronic member 10 is provided inside the protective cover 110.
A metal conductive layer 109 for electromagnetically shielding 4 is provided. The metal conductive layer 109 is made of, for example, an aluminum tape with a copper foil, and is fixed to the inner surface of the upper housing case 108 with an adhesive or the like, or the electronic member 104 is fixed to the metal conductive layer 109.
The electronic member 104 is electromagnetically shielded by directly wrapping it.

In such a conventional transmitter for migratory birds, the thickness of the protective cover 110 needs to be 3 to 4 mm from the viewpoint of strength, and the electronic member 104 has not been sufficiently miniaturized. So it is large and its weight is 4
It weighs 0 to 50 g and has been applied to relatively large migratory birds such as manatsuru and hatchuru.

[0015]

However, since the weight limit of the transmitter for migratory birds is set to be within 5% of the weight of the bird, the above-mentioned conventional sensor cannot be used for the heron, eagle, hawk, duck, shore, etc. However, medium-sized birds, which occupy most of the migratory birds, have a problem that they cannot be applied in terms of size and weight.

In general, the following methods are used to reduce the size and weight of electronic devices.

(1) Reduction in size and weight of electronic parts and batteries (2) Reduction in size and weight of antenna (3) Reduction in density of housing material (4) Reduction in thickness of housing cover The following problem arises when is applied to a transmitter for migratory birds.

That is, the reduction in size and weight of electronic components, batteries, antennas, and the like has reached its limit, and further significant weight reduction cannot be expected.

Further, in order to prevent the danger of breakage of the housing cover due to the impact of the bird's beak and entry of water, the housing cover cannot be made extremely thin.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a shape that can be attached to the back of a medium-sized migratory bird, a weight that does not apply an excessive load to the bird, and that no water enters the inside. Provided is an ultra-compact and lightweight electronic device that has a waterproof structure, an electromagnetic wave shielding structure for maintaining a transmission function, and an exterior strength that can withstand the impact of a bird's beak, and that is simple, easy, and inexpensive to mold. It is in.

[0021]

In order to achieve the above object, an ultra-compact and lightweight electronic device according to the present invention comprises a substrate, an electronic member comprising an electronic component and a battery mounted on the substrate, and a base mounted on the substrate. An antenna with a protective cover having an end fixed, a ground wire having one end connected to the base, a foam member for enclosing the electronic member, a part of the antenna with the protective cover, and the ground wire therein; The antenna with the protective cover is configured to include a metal conductive layer provided around the foam member and a coating layer including an insulating layer provided around the metal conductive layer, and the antenna with the protective cover protrudes outside the coating layer. A ground wire is connected to the metal conductive layer through the foam member.

According to another aspect of the present invention, there is provided an ultra-compact and lightweight electronic device comprising a substrate, an electronic member including an electronic component mounted on the substrate and a battery, and one end fixed to the substrate. An antenna with a protective cover, a ground wire having one end connected to the base, an upper foam member and a lower foam member for enclosing the electronic member, a part of the antenna with the protective cover, and the ground wire therein. And a cover layer comprising a metal conductive layer provided around the sealed case and an insulating layer provided around the metal conductive layer, and both ends of the base are connected to the sealed case. The antenna with the protective cover is inserted and fixed, protrudes outside the covering layer, and the ground wire penetrates the enclosing case and is connected to the metal conductive layer.

Further, in order to achieve the above object, an ultra-small and lightweight electronic device according to the present invention comprises a base, an electronic member including an electronic component mounted on the base and a battery, and one end fixed to the base. An antenna with a protective cover, a ground wire having one end connected to the base, a foam fixing member into which both ends of the base are inserted and fixed, and a part of the antenna with the electronic member and the protective cover. The antenna, comprising: a housing case including an upper protective case and a lower protective case enclosing the ground wire and the foam fixing member therein; and a metal conductive layer provided inside the housing case. Protrudes outside the housing case, and the ground wire is connected to the metal conductive layer.

In these cases, a moisture-proof layer is formed on the surface of the electronic member, and a water-shielding layer is formed on the antenna projection with the protective cover.

[0025]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an ultra-compact and lightweight electronic device according to a first embodiment of the present invention. This ultra-compact, lightweight electronic device
Substrate 1 and various electronic components 2 and battery 3 mounted on substrate 1
An electronic member 4 consisting of: an antenna 5 with a protective cover 6 having one end fixed to the base 1; a ground wire 7 having one end connected to the base 1; an antenna 5 with an electronic member 4 and the protective cover 6
A foam member 8 enclosing a part of the above and the ground wire 7 inside;
It comprises a metal conductive layer 9 provided around the foamed member 8 and a coating layer 11 made of an insulating layer 10 provided around the metal conductive layer 9.

The antenna 5 with the protective cover 6 is provided with the cover layer 1
1 and has a length sufficient to satisfy the transmission function.

The ground wire 7 having one end connected to the substrate 1 is
The other end is connected to the metal conductive layer 9 through the foam member 8.

The antenna 5 with the protective cover 6 is covered with the covering layer 11.
A water shielding portion 19 is provided in a portion penetrating through.

The protective cover 6 of the antenna 5
And the metal conductive layer 9 are insulated from each other, and the protective cover 6 and the cover layer 11 and the protective cover 6 and the foam member 8 are completely adhered to each other to prevent water from entering from outside.

A method of manufacturing the ultra-small and lightweight electronic device having the above configuration will be described with reference to FIGS.

First, in step (1), as shown in FIG. 2, a substrate 1 and various electronic components 2 mounted on the substrate 1 are formed.
An electronic member 4 including a battery 3, an antenna 5 with a protective cover 6 having one end fixed to the base 1, and a ground wire 7 having one end connected to the base 1 are separated from the upper mold 12 and the lower mold 13. Set in the formwork.

In this case, the antenna 5 with the protective cover 6 and the ground wire 7 are set so as to protrude from the antenna protruding hole 14 or the ground wire protruding hole 15 provided on the upper die 12 to the outside of the mold.

As the mold, preferably, a mold made of silicon is suitable in terms of cost and moldability, but any mold other than silicon can be used as long as it can be manufactured at a low cost by a simple method. do not do.

The antenna 5 with the protective cover 6 is configured so that a portion of the antenna 5 which is located substantially in the mold is covered with the protective cover 6.

The antenna is usually made of TiNi, but a material other than TiNi may be used. As the protective cover 6, a heat-shrinkable tube containing an adhesive is preferable, and is heat-treated to be integrated with the antenna before being sealed in the mold.

The protective cover 6 insulates the antenna 5 from the metal conductive layer 9 and completely adheres the protective cover 6 to the cover layer 11 and the protective cover 6 to the foam member 8.
It functions to prevent water from entering from outside.

An injection hole 16 for injecting a foaming material is provided at a substantially central portion of the upper mold 12.

Next, in the step (2), as shown in FIG. 3, the liquid foaming raw material 17 which has been prepared in advance is injected into the mold from the injection hole 16 and completely filled, and then fully foamed and solidified. .

In this case, the foaming raw material 17 may be a mixture of a main component such as urethane, styrene, ethylene or the like with a suitable amount of a foaming agent or a foaming aid. Materials other than these may be used and are not particularly limited.

However, when the electronic component 2 or the battery 3 has a thermal restriction, a two-part room temperature urethane foam composed of a polyisocyanate and a polyol is preferable. For waterproofness, a hard polyurethane capable of forming closed cells is preferable.

Next, in the step (3), as shown in FIG. 4, the upper mold 12 and the lower mold 13 are opened and removed, and the electronic member 4, a part of the antenna 5 with the protective cover 6 and the ground wire 7 are removed. Is taken out of the foamed member 8 which has been completely foamed.

When a metal is used as the mold, the foamed member 8 generally has good adhesiveness to the metal, so it is necessary to apply a good release agent on the inner surface of the mold in advance.

The apparent density of the foamed member 8 is 0.1 g / cm.
Since it is about ³ , the weight can be significantly reduced.

The foam member 8 can sufficiently perform a waterproof function if the cells are closed cells, and have such a strength that it is not broken by a bird's beak.

Next, in step (4), a metal conductive layer 9 for shielding electromagnetic waves is formed around the foamed member 8 as shown in FIG.

In this case, the tip of the ground wire 7 and the metal conductive layer 9 are connected.

As the material of the metal conductive layer 9, a double-sided electroless plating of copper and nickel or a sheet metal such as aluminum is preferable.

Further, a part of an electronic component, particularly a source of electromagnetic waves, such as a motherboard, may be covered with a sheet metal such as aluminum in advance to have an electromagnetic wave shielding property.

Finally, in step (5), as shown in FIG. 6, the insulating layer 1 made of resin is formed around the metal conductive layer 9.
0 is applied as a decorative paint to form a metal conductive layer 9 and an insulating layer 10
And the protective cover 6
A water shielding portion 19 is applied to a portion where the attached antenna 5 penetrates the coating layer 11.

As a material for the insulating layer 10, an epoxy-based two-liquid, room-temperature-drying paint is suitable, and may be formed by a method such as spraying.

As a material for the water shielding portion 19, an epoxy resin-based cold-setting adhesive is suitable.

As shown in FIG. 7, in order to protect the electronic member 4 from moisture, a moisture-proof layer 18 is provided on the surface of the electronic member 4.
May be formed.

As a material for the moisture-proof layer 18, a silicon-based coating agent for electronic parts is suitable, and this is coated by a method such as spraying.

As described above, the ultra-compact and lightweight electronic device according to the first embodiment of the present invention has a shape that can be attached to the back of a medium-sized migratory bird, a weight that does not apply an excessive load to the bird, and It has a waterproof structure that does not allow water to enter inside, an electromagnetic wave shielding structure that maintains the transmission function, and an exterior strength that can withstand the impact of a bird's beak, and is simple, easy, and inexpensive to mold. have.

Also, since the members occupying the center of the transmitting function, such as the electronic member 4, the antenna 5 with the protective cover 6, and the ground wire 7, are enclosed and fixed in the foamed member 8, these members are in flight during the flight of the migratory bird. It does not move in the coating layer 11.

FIG. 8 shows an ultra-compact and lightweight electronic device according to a second embodiment of the present invention. This ultra-compact, lightweight electronic device
Substrate 1 and various electronic components 2 and battery 3 mounted on substrate 1
An electronic member 4 consisting of: an antenna 5 with a protective cover 6 having one end fixed to the base 1; a ground wire 7 having one end connected to the base 1; an antenna 5 with an electronic member 4 and the protective cover 6
Upper foam member 2 enclosing a part of the above and the ground wire 7 inside
And a cover layer 11 composed of a metal conductive layer 9 provided around the sealed case 22 and an insulating layer 10 provided around the metal conductive layer 9.
It is comprised including.

The upper foamed member 20 and the lower foamed member 21 are adhered via an adhesive layer 25 to form a sealed case 22.

Further, both ends of the base 1 are enclosed
It is inserted and fixed to the side wall.

The antenna 5 with the protective cover 6 protrudes outside the enclosing case 22 and has a length sufficient to satisfy the transmission function.

The ground wire 7 having one end connected to the substrate 1
The other end is connected to the metal conductive layer 9 through the sealing case 22.

Further, a sealing member 23 is formed at a portion where the ground wire 7 penetrates through the enclosing case 22.
A sealing member 24 is also formed at a portion where the antenna 5 with the protective cover 6 penetrates the enclosing case 22.

The antenna 5 with the protective cover 6 is covered with the covering layer 11.
A water shielding portion 19 is provided in a portion penetrating through.

The protective cover 6 of the antenna 5
And the metal conductive layer 9 are insulated, and the protective cover 6 and the sealing member 24 and the protective cover 6 and the cover layer 11 are completely adhered to each other to prevent water from entering from outside.

A method of manufacturing the ultra-small and lightweight electronic device having the above configuration will be described with reference to FIGS.

First, in the step (1), as shown in FIG. 9, the antenna projecting hole 26 and the ground wire projecting hole 27 are formed.
An upper foam member 20 and a lower foam member 21 having the following are prepared.

The upper foam member 20 and the lower foam member 21
For example, urethane can be easily obtained by injecting urethane into a molding die.

Next, in step (2), as shown in FIG. 10, an electronic member 4 composed of a substrate 1, various electronic components 2 mounted on the substrate 1, and a battery 3, and one end of the substrate 1 The antenna 5 with the protective cover 6 and the ground wire 7 having one end connected to the base 1 are set in an enclosing case 22 composed of an upper foam member 20 and a lower foam member 21.

In this case, both ends of the base 1 are inserted into and fixed to the side walls of the enclosing case 22, respectively. Also,
The antenna 5 with the protective cover 6 and the ground wire 7 are respectively connected to the antenna protrusion holes 2 provided in the upper foam member 20.
6 or the ground wire protruding hole 27 so as to protrude outside the enclosing case 22.

The upper foam member 20 and the lower foam member 21
The bonding is performed via the adhesive layer 25.

Next, in step (3), as shown in FIG. 11, the antenna projecting hole 26 and the ground wire projecting hole 27 are sealed with the sealing members 23 and 24, respectively.

As a material for the sealing members 23 and 24, a room temperature-curable urethane resin or epoxy resin is preferable.

Next, in step (4), as shown in FIG. 12, a metal conductive layer 9 for shielding electromagnetic waves is formed around the encapsulating case 22.

In this case, the tip of the ground wire 7 is connected to the metal conductive layer 9.

As the material of the metal conductive layer 9, a double-sided electroless plating of copper and nickel or a sheet metal such as aluminum is preferable.

Further, a part of an electronic component such as a mother board, which is a source of generating electromagnetic waves, may be covered with a sheet metal such as aluminum in advance to provide an electromagnetic wave shielding property.

Finally, in the step (5), as shown in FIG. 13, an insulating layer 10 made of a resin is applied around the metal conductive layer 9 as a decorative coating, and the metal conductive layer 9 and the insulating layer 1 are coated.
In addition to forming the covering layer 11 made of 0, a water shielding portion 19 is applied to a portion where the antenna 5 with the protective cover 6 penetrates the covering layer 11.

The material of the insulating layer 10 is epoxy 2
A liquid room temperature drying type paint is suitable, and it is good to form by a technique such as spraying.

As a material for the water shielding portion 19, an epoxy resin-based cold-setting adhesive is suitable.

As shown in FIG. 14, in order to protect the electronic member 4 from moisture, a moisture-proof layer 1 is formed on the surface of the electronic member 4.
8 may be formed.

As a material for the moisture-proof layer 18, a silicon-based coating agent for electronic parts is suitable, and this is coated by a method such as spraying.

As described above, the ultra-compact and lightweight electronic device according to the second embodiment of the present invention has a shape that can be attached to the back of a medium-sized migratory bird, a weight that does not apply an excessive load to the bird, and It has a waterproof structure that does not allow water to enter inside, an electromagnetic wave shielding structure that maintains the transmission function, and an exterior strength that can withstand the impact of a bird's beak, and is simple, easy, and inexpensive to mold. have.

Further, since both ends of the base 1 on which the electronic members 4 are mounted are inserted and fixed to the side walls of the enclosing case 22, these members are inserted into the enclosing case 22 during the flight of migratory birds.
Does not move inside.

FIG. 15 shows an ultra-compact and lightweight electronic device according to a third embodiment of the present invention. This ultra-compact and lightweight electronic device includes an electronic member 4 including a base 1, various electronic components 2 mounted on the base 1, and a battery 3, an antenna 5 with a protective cover 6 having one end fixed to the base 1, A ground wire 7 having one end connected to the base 1; a pair of foam fixing members 30 into which both ends of the base 1 are inserted and fixed; a part of the antenna 5 with the electronic member 4 and the protective cover 6; Upper protective case 3 enclosing wire 7 and foam fixing member 30 inside
1 and a lower case 32 comprising a lower protective case 32;
And a metal conductive layer 9 provided inside the housing case 33.

The upper protective case 31 and the lower protective case 32
Is bonded to the housing case 33 through an adhesive layer 35.
Is composed.

As a material of the housing case 33, a plastic film excellent in strength, durability and workability, for example,
It is preferable to use a film such as PC, PET, or PI.

The antenna 5 with the protective cover 6 having one end fixed to the substrate 1 protrudes outside the housing case 33 and has a length sufficient to satisfy the transmission function.

The ground wire 7 having one end connected to the substrate 1
The other end is connected to the metal conductive layer 9.

A sealing member 34 and a water shielding part 38 are formed at a portion where the antenna 5 with the protective cover 6 penetrates the upper protective case 31.

The protective cover 6 of the antenna 5
And the metal conductive layer 9 are insulated, and the protective cover 6, the sealing member 34, and the upper protective case 31 are completely adhered to each other to prevent water from entering from outside.

A method of manufacturing the ultra-small and lightweight electronic device having the above configuration will be described with reference to FIGS.

First, in step (1), as shown in FIG. 16, a plastic molding method such as a hot press molding method or a vacuum molding method is used to form an upper portion of a predetermined shape having an antenna projecting hole 36 using a plastic film. The protection case 31 is formed.

Separately, the lower protective case 32 is cut out from a plastic film.

Next, in step (2), as shown in FIG. 17, a metal conductive layer 9 for shielding electromagnetic waves is formed on the inner surface of the upper protective case 31 and the upper surface of the lower protective case 32.

As the material of the metal conductive layer 9, a double-sided electroless plating of copper and nickel or a sheet metal such as aluminum is preferable.

Further, a part of an electronic component, particularly a source of electromagnetic waves, such as a motherboard, may be covered with a sheet metal such as aluminum in advance to provide electromagnetic wave shielding.

Next, in step (3), as shown in FIG. 18, various electronic components 2, batteries 3, and protective covers 6 are formed.
Both ends of the base 1 on which the antenna 5 with the antenna and the ground wire 7 are mounted are inserted into the foam fixing member 30 and fixed.

Next, in step (4), as shown in FIG. 19, the foam fixing member 30 into which both ends of the base 1 are inserted is set inside the upper protective case 31 and the lower protective case 32. The upper protective case 31 and the lower protective case 32 are bonded via an adhesive layer 35.

In this case, the antenna 5 with the protective cover 6
Are the antenna protrusion holes 36 provided in the upper protection case 31.
Is set so as to protrude from the upper protective case 31 to the outside.

A ground wire 7 having one end connected to the base 1
Is connected to the metal conductive layer 9 in advance.

Next, in the step (5), as shown in FIG. 20, the antenna projecting hole 36 is sealed by the sealing member 34, and the antenna 5 with the protective cover 6 penetrates through the upper protective case 31. The water shielding portion 38 is formed on the substrate.

As the material of the sealing member 34, a room temperature-curable urethane resin or epoxy resin is preferable.

As a material for the water shielding portion 38, an epoxy resin-based room-temperature-curable adhesive is preferable.

Further, as shown in FIG. 21, in order to protect the electronic member 4 from moisture, a moisture-proof layer 3 is formed on the surface of the electronic member 4.
7 may be formed.

As the material of the moisture-proof layer 37, a silicon-based coating agent for electronic parts is suitable, and this is coated by a method such as spraying.

As described above, the ultra-compact and lightweight electronic device according to the third embodiment of the present invention has a shape that can be attached to the back of a medium-sized migratory bird, a weight that does not apply an excessive load to the bird, and It has a waterproof structure that does not allow water to enter inside, an electromagnetic wave shielding structure that maintains the transmission function, and an exterior strength that can withstand the impact of a bird's beak, and is simple, easy, and inexpensive to mold. have.

Further, since both ends of the base 1 on which the electronic member 4 and the like are mounted are inserted and fixed in the foam fixing member 30, the electronic member 4, the antenna 5 with the protective cover 6, the ground wire 7 and the like during flight of migratory birds. And other main components of the transmitter do not move inside the housing case 33.

In the above embodiment of the present invention, the case where the ultra-compact and lightweight electronic device of the present invention is used as a transmitter mounted on a migratory bird has been described as an example. It is not limited to the transmitter. For example, it can be used as a transmitter to be mounted on animals other than migratory birds, and further, it can be used as various electronic devices including various communication devices such as mobile phones that require ultra-compact and lightweight, sensors, and the like. is there.

[0109]

【Example】

(Example 1) A mold made of an upper mold 12 and a lower mold 13 made of a silicone resin and having a cross-sectional shape shown in FIG. An electronic member 4, an antenna 5 made of TiNi having one end fixed to the base 1 and having a thickness of 0.7 mm and a length of 220 mm;
And an earth wire 7 having one end fixed thereto.

In this case, the combined weight of the electronic member 4 and the ground wire 7 was 11.4 g. The surface of the electronic member 4 and the ground wire 7 was coated as a moisture-proof layer 18 with a silicon-based coating agent for electronic components to a thickness of 20 μm by a spray method. The weight of the moisture-proof layer 18 is about 0.
2 g.

Note that a portion of the antenna 5 was previously covered with a nylon heat-shrinkable tube containing an epoxy resin-based adhesive, and heat-treated to be integrated with the antenna 5 to form a protective cover 6.

The weight of the antenna 5 was 0.5 g, and the weight of the protective cover 6 was 0.2 g.

Next, the electronic member 4, the antenna 5 with the protective cover 6 having one end fixed to the base 1, and the ground wire 7 having one end connected to the base 1 are connected to the antenna 5 and the ground wire 7, respectively. The upper mold 12 was set so as to project from the antenna projecting hole 14 or the ground wire projecting hole 15 to the outside of the mold.

Next, a previously prepared urethane foaming stock solution was injected from the injection hole 16 of the upper mold 12 until the inside of the mold was completely filled, and foamed and cured at room temperature.

The weight of the urethane foam resin was 0.8 g.

After the foaming is completed, the mold is removed, the urethane foam resin enclosing the electronic member 4 and the like is taken out, and the surface of the urethane foam resin is plated with Ni-Cu for electromagnetic wave shielding by electroless plating. gave.

The thickness of the electromagnetic wave shielding layer (metal conductive layer 9) is about 10 μm, corresponding to a weight of about 0.5 g.

In this case, the other end of the ground wire 7 whose one end was connected to the substrate 1 was connected to the electromagnetic wave shielding layer.

Finally, the surface of the electromagnetic wave shielding layer is spray-coated with an epoxy-based two-liquid, room-temperature dry paint to form an insulating layer 10 having a thickness of about 100 μm. The water shielding portion 19 was formed with a resin-based cold-setting adhesive.

The total weight of the insulating layer 10 and the water shield 19 was about 0.8 g.

The external dimensions of the transmitter manufactured in this way were 25 mm in width, 60 mm in length, 17 mm in height, and weight was 14.4 g, which was ultra-compact and lightweight. It was also confirmed that the transmission function was sufficient for a long period of time.

If this transmitter is fixed to the back of a migratory bird with about 0.8 g of adhesive, the total weight of the transmitter and the adhesive is about 15.2 g, which is 5% of the weight of 500 g of a medium-sized migratory bird.
It does not overload the migratory birds with excessive weight loads.

(Example 2) An upper foaming member 20 and a lower foaming member 21 made of urethane foam resin having a sectional shape shown in FIG. 9, a base 1, various electronic components 2 mounted on the base 1, and a battery 3. , An antenna 5 made of TiNi having one end fixed to the base 1 and having a thickness of 0.7 mm and a length of 220 mm, and a ground wire 7 connected to the base 1 at one end.

In this case, the total weight of the upper foam member 20 and the lower foam member 21 was 0.8 g.

Further, the weight of the electronic member 4 and the ground wire 7 was 11.4 g in total.

The surface of the electronic member 4 and the ground wire 7 was coated as a moisture-proof layer 18 with a silicon-based coating agent for electronic components to a thickness of 20 μm by a spray method. The weight of the moisture-proof layer 18 was about 0.2 g.

Note that a portion of the antenna 5 was previously covered with a nylon heat-shrinkable tube containing an epoxy resin-based adhesive, and then heat-treated to be integrated with the antenna 5 to form a protective cover 6.

The weight of the antenna 5 was 0.5 g, and the weight of the protective cover 6 was 0.2 g.

Next, the electronic member 4, the antenna 5 with the protective cover 6 having one end fixed to the base 1, and the ground wire 7 having one end connected to the base 1 are connected to the upper foam member 20 and the lower foam member 21. Then, the both ends of the substrate 1 are inserted into the respective side walls of the lower foam member 21 and set.
0 and the lower foam member 21 were adhered with an adhesive 25 to form an enclosure case 22.

In this case, the antenna 5 and the ground wire 7
The upper foam member 20 was set so as to protrude outside the upper foam member 20 from the antenna protrusion hole 26 or the ground wire protrusion hole 27 provided in the upper foam member 20, respectively.

Next, the antenna projecting hole 26 and the ground wire projecting hole 27 were sealed with sealing members 23 and 24.

Next, Ni-Cu plating for electromagnetic wave shielding was applied around the enclosing case 22 by an electroless plating method.

The thickness of the electromagnetic wave shielding layer (metal conductive layer 9) is about 10 μm, corresponding to a weight of about 0.5 g.

In this case, the other end of the ground wire 7 whose one end was connected to the substrate 1 was connected to the electromagnetic wave shielding layer.

Finally, the surface of the electromagnetic wave shielding layer is spray-coated with an epoxy-based two-liquid, room-temperature dry paint to form an insulating layer 10 having a thickness of about 100 μm. The water shielding portion 19 was formed with a resin-based cold-setting adhesive.

The total weight of the insulating layer 10 and the water shielding portion 19 was about 0.8 g.

The external dimensions of the transmitter manufactured in this manner were 25 mm in width, 60 mm in length, 17 mm in height, and 14.4 g in weight, which was very small and light. It was also confirmed that the transmission function was sufficient for a long period of time.

When this transmitter is fixed to the back of a migratory bird with about 0.8 g of adhesive, the total weight of the transmitter and the adhesive becomes about 15.2 g, which is 5% of the weight of 500 g of a medium-sized migratory bird.
It does not overload the migratory birds with excessive weight loads.

Example 3 An upper protective case 31 made of PC having a sectional shape shown in FIG. 16 was formed by a vacuum forming method and cut out from a PC film into a predetermined shape to form a lower protective case 32.

Upper protective case 31 and lower protective case 32
Was 0.8 g in total.

Next, the inner surface of the upper protective case 31 and the upper surface of the lower protective case 32 were plated with Ni-Cu for electromagnetic wave shielding by electroless plating.

The thickness of the electromagnetic wave shielding layer (metal conductive layer 9) is about 10 μm, corresponding to a weight of about 0.5 g.

An electronic member 4 composed of a base 1, various electronic components 2 mounted on the base 1, and a battery 3, a TiNi fixed at one end to the base 1, having a thickness of 0.7 mm and a length of 22
A 0 mm antenna 5 and a ground wire 7 having one end connected to the base 1 were prepared.

The total weight of the electronic member 4 and the ground wire 7 was 11.4 g.

The surface of the electronic member 4 and the ground wire 7 was coated as a moisture-proof layer 18 with a silicon-based coating agent for electronic components to a thickness of 20 μm by a spray method. The weight of the moisture-proof layer 18 was about 0.2 g.

A portion of the antenna 5 was previously covered with a nylon heat-shrinkable tube containing an epoxy resin-based adhesive, and then heat-treated to be integrated with the antenna 5 to form a protective cover 6.

The weight of the antenna 5 was 0.5 g, and the weight of the protective cover 6 was 0.2 g.

Next, both ends of the substrate 1 were inserted and fixed in a pair of urethane resin foam fixing members 30.

The weight of the foam fixing member 30 was 0.5 g.

Next, the foam fixing member 30 into which both ends of the base 1 are inserted is set inside the upper protective case 31 and the lower protective case 32, and the upper protective case 31 and the lower protective case 32 are bonded with an adhesive layer. Thus, the housing case 33 was formed by joining the base members 35.

In this case, the antenna 5 is
1 is set so as to protrude outside the upper protective case 31 from the antenna protruding hole 36 provided in
The other end of the ground wire 7 whose one end was connected to the substrate 1 was connected to the electromagnetic wave shield layer.

Next, the antenna projecting hole 36 was sealed with a sealing member 34 made of epoxy resin.

Finally, a water shielding portion 38 was formed on the protruding portion of the antenna by using an epoxy resin-based cold-setting adhesive.

[0154] The weight of the sealing member 34 was about 0.3 g, and the weight of the water shielding portion 38 was 0.2 g.

The external dimensions of the transmitter thus manufactured were 25 mm in width, 60 mm in length, 17 mm in height, and 14.6 g in weight, and were very small and light. It was also confirmed that the transmission function was sufficient for a long period of time.

If this transmitter is fixed to the back of a migratory bird with approximately 0.8 g of adhesive, the total weight of the transmitter and the adhesive is approximately 15.4 g, which is 5% of the weight of 500 g of a medium-sized migratory bird.
It does not overload the migratory birds with excessive weight loads.

[0157]

According to the above-described ultra-compact and lightweight electronic device of the present invention, a shape that can be attached to the back of a medium-sized migratory bird, a weight that does not apply an excessive load to the bird, and water does not enter the inside. Ultra-small and light-weight electronic devices that have a waterproof structure, an electromagnetic wave shielding structure necessary for maintaining the transmission function, and an exterior strength that can withstand the impact of a bird's beak can be realized at low cost through simple and easy processes. effective.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of a microminiature electronic device according to the present invention.

FIG. 2 is a front sectional view showing a manufacturing process (1) of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 3 is a front sectional view showing a manufacturing step (2) of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 4 is a front sectional view showing a manufacturing step (3) of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 5 is a front sectional view showing a manufacturing step (4) of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 6 is a front sectional view showing a manufacturing step (5) of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 7 is a front sectional view showing a modification of the first embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 8 is a front sectional view showing a second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 9 is a front sectional view showing a manufacturing process (1) of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 10 is a front sectional view showing a manufacturing process (2) of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 11 is a front sectional view showing a manufacturing step (3) of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 12 is a front cross-sectional view showing a manufacturing step (4) of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 13 is a front sectional view showing a manufacturing step (5) of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 14 is a front sectional view showing a modification of the second embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 15 is a front sectional view showing a third embodiment of a microminiature electronic device according to the present invention.

FIG. 16 is a front sectional view showing a manufacturing step (1) of the third embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 17 is a front sectional view showing a manufacturing step (2) of the third embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 18 is a front sectional view showing a manufacturing step (3) of the third embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 19 is a front sectional view showing a manufacturing step (4) of the third embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 20 is a front sectional view showing a manufacturing step (5) of the third embodiment of the ultra-compact and lightweight electronic device according to the present invention.

FIG. 21 is a front sectional view showing a modification of the third embodiment of the microminiature electronic device according to the present invention.

FIG. 22 is a front sectional view showing a configuration example of a conventional small and lightweight electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Electronic component 3 ... Battery 4 ... Electronic member 5 ... Antenna 6 ... Protective cover 7 ... Ground wire 8 ... Foam member 9 ... Metal conductive layer 10 ... Insulating layer 11 ... Coating layer 12 ... Upper die 13 ... Lower die 14, 26, 36 ... Antenna projecting hole 15, 27 ... Ground wire projecting hole 16 ... Injection hole 17 ... Foaming material 18, 37 ... Moisture-proof layer 19, 38 ... Water shielding part 20 ... Upper foaming member 21 ... Lower foaming member 22 ... Enclosure case 23, 24, 34 ... sealing member 25, 35 ... adhesive layer 30 ... foam fixing member 31 ... upper protection case 32 ... lower protection case 33 ... housing case

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shinji Tsuru, Inventor 3-192-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Hajio Hoshino 3-19, Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Nippon Telegraph and Telephone Corporation

Claims (4)

[Claims] An electronic member comprising a substrate, an electronic component mounted on the substrate, and a battery; an antenna with a protective cover having one end fixed to the base; a ground wire having one end connected to the base; A foam member enclosing the electronic member, a part of the antenna with the protective cover, and the ground wire, a metal conductive layer provided around the foam member, and an insulating layer provided around the metal conductive layer Wherein the antenna with the protective cover projects outside the coating layer, and the ground wire passes through the foam member and is connected to the metal conductive layer. And ultra-compact and lightweight electronic equipment. 2. An electronic member comprising a substrate, an electronic component mounted on the substrate, and a battery; an antenna with a protective cover having one end fixed to the base; and a ground wire having one end connected to the base. An enclosing case comprising an upper foam member and a lower foam member for enclosing the electronic member, a part of the antenna with the protective cover, and the ground wire therein; a metal conductive layer provided around the enclosing case; A cover layer made of an insulating layer provided around the metal conductive layer, and both ends of the base are inserted and fixed in the enclosing case, and the antenna with the protective cover is provided outside the cover layer. And the ground wire penetrates through the enclosing case and is connected to the metal conductive layer. 3. An electronic member comprising a base, an electronic component mounted on the base, and a battery; an antenna with a protective cover having one end fixed to the base; and a ground wire having one end connected to the base. A foam fixing member into which both ends of the base are inserted and fixed, an upper protective case for enclosing the electronic member, a part of the antenna with the protective cover, the ground wire and the foam fixing member therein; The antenna includes a housing case including a lower protective case, and a metal conductive layer provided inside the housing case. The antenna protrudes outside the housing case, and the ground wire is the metal conductive layer. An ultra-compact, lightweight electronic device characterized by being connected to 4. The ultra-compact and lightweight electronic device according to claim 1, wherein a moisture-proof layer is formed on a surface of said electronic member, and a water-shielding layer is formed on said antenna projection with said protective cover. An ultra-compact and lightweight electronic device characterized by: