JP2001222345A - Portable information terminal and battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable information terminal which is light and compact. SOLUTION: A portable telephone set 1a is provided with a case body 2, control keys 5 mounted on the case body 2 for inputting information, a battery 21 to be positioned so as to face the control keys 5, a back case body 6 mounted on the case body 2 so as to face the control keys 5 so that the battery 21 can be held, and double-sided tapes 12a and 12b formed between the battery 21 and the rear-side case 6 so that the battery 21 can be fixed to the rear-side case 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable information terminal and a battery, and more particularly to a portable information terminal such as a portable telephone and a notebook personal computer and a battery used for the portable information terminal.

[0002]

2. Description of the Related Art In recent years, portable information terminals such as portable telephones and notebook personal computers have become widespread. A portable information terminal is usually provided with a battery for supplying power.

A battery mounted on a portable information terminal usually has a power generating element for generating electric power, a positive electrode terminal and a negative electrode terminal connected to the power generating element, and an exterior member surrounding the power generating element. The battery is covered by a battery pack housing. The battery is attached to the portable information terminal by fitting the battery pack casing to the casing of the portable information terminal.

[0004]

Since the portable information terminal is carried by a human, it is preferable that the portable information terminal is small and lightweight. For this reason, research for reducing the size and weight of the portable information terminal has been conventionally conducted. In order to reduce the size and weight of the portable information terminal, it is important to reduce the size and weight of the battery, which is a main part of the portable information terminal. However, in the conventional portable information terminal,
It is difficult to reduce the size and weight of the battery, and it is difficult to reduce the size and weight of the portable information terminal itself.

In a portable telephone or the like, a person manually presses an information input member such as an operation key in order to input information. At this time, if the battery is positioned so as to face the operation key, the load applied to the operation key is applied to the battery. Since this load reaches 20 to 30 N, the battery is bent by about 0.4 mm. There is a problem that a failure such as a short circuit occurs inside the battery due to the bending, and the mobile phone does not operate.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a portable information terminal and a battery which can be reduced in size and weight. Things.

It is another object of the present invention to provide a highly reliable portable information terminal and a battery which do not cause a failure such as a short circuit inside the battery.

[0008]

A portable information terminal according to the present invention includes a main body, an information input member, a battery, a holding member, and a support member. The information input member is a member attached to the main body and for inputting information. The battery is positioned so as to face the information input member. The holding member is attached to the main body and is provided to face the information input member to hold the battery. The support member is provided between the battery and the holding member to fix the battery to the holding member.

In the portable information terminal thus configured, the battery is fixed to the holding member by providing the support member between the battery and the holding member. Therefore, unlike the conventional case, the battery can be fixed without providing a battery pack housing that covers the battery. As a result, the portable information terminal can be reduced in size and weight.

Preferably, the supporting member is bonded to the battery and the holding member. In this case, since the support member is bonded to the battery and the holding member, an adhesive can be used as the support member. As a result, the support member can be configured at low cost.

Preferably, the support member includes a plurality of support members for fixing the battery at two or more locations. In this case, since the battery is fixed at two or more locations, the battery is stabilized. As a result, poor contact between the battery and the terminal of the portable information terminal can be prevented.

Preferably, the surface of the holding member facing the battery is a curved surface that forms a space between the holding member and the information input member. When the battery is placed on the curved surface of the holding member, a support member is provided at a portion where the curved surface and the end of the battery abut. In this case, since the support member is provided on the curved surface portion closest to the battery, the support member securely fixes the battery.

[0013] Also preferably, the battery includes a power generating element for generating electric power, and a metal housing surrounding the power generating element. In this case, since the power generation element is surrounded by the metal housing, the battery may bend even when a load from the information input member is applied to the battery when a person presses the information input member by hand to input information. Absent. Therefore, a failure such as a short circuit does not occur inside the battery, and a highly reliable portable information terminal can be provided.

Preferably, the surface of the holding member facing the battery is a curved surface that forms a space between the holding member and the information input member, and a support member is provided in a space formed between the curved surface and the battery. Have been. In this case, since the support member is provided in the space between the holding member and the battery, no space is wasted and the portable information terminal can be downsized.

[0015] Preferably, the battery includes a power generating element for generating electric power, and a wrapping member surrounding the power generating element. In this case, since the battery is wrapped in the envelope-shaped outer member, the mechanical strength of the battery is reduced. However, since the support member is provided in the space between the battery and the holding member, even when a load from the information input member is applied to the battery when a person presses the information input member by hand to input information, the battery is not charged. There is no deflection. Therefore, a failure such as a short circuit does not occur inside the battery, and a highly reliable portable information terminal can be provided.

Preferably, the portable information terminal further includes a conductive member positioned between the battery and the information input member. In this case, even when a load from the information input member is applied to the battery when a person manually presses the information input member to input information, the conductive member disperses the load, so that the battery does not bend. Therefore, a highly reliable portable information terminal can be provided without causing a failure such as a short circuit inside the battery. Since the conductive member has an electromagnetic shielding effect, the battery does not affect the electromagnetic waves transmitted and received by the portable information terminal.

A battery according to the present invention is mounted on a portable information terminal including a main body and an information input member for inputting information, which is mounted on the main body, and is positioned to face the information input member. And a power generating element,
An exterior member and a conductive member are provided. The power generating element generates electric power. The exterior member covers the power generation element. The conductive member is attached to a surface of the exterior member facing the information input member.

In the battery configured as described above, the battery can be fixed to the portable information terminal by fixing the battery to the housing of the portable information terminal with the conductive member facing the information input member. Therefore, unlike the conventional case, the battery can be fixed without providing a battery pack housing that covers the battery. As a result, by incorporating this battery into a portable information terminal, the size and weight of the portable information terminal can be reduced.

Further, even if a load from the information input member is applied to the battery when a person manually presses the information input member to input information, the battery may bend because the conductive member disperses the load. Absent. Therefore, a highly reliable battery can be provided without causing a failure such as a short circuit inside the battery.
Further, since the conductive member has an electromagnetic shielding effect, the battery does not affect the electromagnetic waves transmitted and received by the portable information terminal.

[0020]

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

(Embodiment 1) FIG. 1 is a plan view of a mobile phone according to Embodiment 1 of the present invention. Referring to FIG. 1, a mobile phone 1a as a mobile information terminal according to Embodiment 1 of the present invention has a housing 2 as a main body. An antenna 40, a display panel 4, and operation keys 5 are attached to the housing 2. The antenna 40 is attached to the tip of the housing 2. Most of the antenna 40 is housed in the housing 2 and extends so as to protrude from the housing 2 when the mobile phone 1a is used.

The display panel 4 is arranged at the center of the housing 2. The display panel 4 is composed of liquid crystal, and the mobile phone 1
The data received by a and the data transmitted by the mobile phone 1a are displayed in characters.

An operation key 5 as an information input member is a member for inputting information to a main body circuit provided in the cellular phone 1a, and can be input by a person pressing the operation key 5 by hand. it can.

FIG. 2 is a view showing a cross section taken along line II-II in FIG. With reference to FIG.
a is a housing 2, an operation key 5, a back housing 6 as a holding member, a sheet 7, a board 8, a printed board 9,
The battery includes a battery 21 and double-sided tapes 12a and 12b as support members.

The cross section of the housing 2 is rectangular, and a hole is formed in the surface of the housing 2. The operation key 5 is fitted into this hole. The operation keys 5 are members for inputting information, and are attached to the housing 2. The operation keys 5 are adhered to a sheet 7 provided in the housing 2. A sheet 7, a board 8, and a printed board 9 are provided in the housing 2. The substrate 8 is a member for securing strength in the housing 2 and is made of an insulating material. The sheet 7 is attached to one surface of the substrate 8 and the printed circuit board 9 is attached to the other surface. The printed circuit board 9 is a mobile phone 1a.
Has a main body circuit (not shown) for processing an input / output electric signal. The main circuit comprises resistors 10 and 1
1. Electronic components such as wiring, capacitors, coils, etc. The battery 21 is connected to the main circuit. Battery 21
Is supplied to the main body circuit from the power supply.

The housing 2 is provided with a rear housing 6. The back case 6 is provided so as to support the battery 21 and face the operation keys 5. The back case 6 is made of plastic, and the inner surface 6 a is a curved surface that forms a space between the operation keys 5 and the back case 6. The rear housing 6 has a shape protruding outward. The inner surface 6a of the back case 6 may be a surface having no curvature. Back case 6
Double-sided tapes 12 a and 12 b are provided between the battery and the battery 21. The double-sided tapes 12a and 12b are adhered to both the battery 21 and the back case 6. Further, the battery 21 is fixed to the rear housing 6 at two places by the double-sided tapes 12a and 12b. When the battery 21 is placed on the inner surface 6a, double-sided tapes 12a and 12b are provided at portions where the inner surface 6a abuts on the ends of the battery 21.

The battery 21 has a battery core 15 as a power generating element for generating electric power, and a metal casing 13 made of an aluminum alloy and surrounding the battery core 15. The battery 21 is attached to the mobile phone 1 a and positioned so as to face the operation keys 5. The battery core 15 is formed by winding a predetermined laminate. Battery core 15 is electrically connected to a positive electrode terminal and a negative electrode terminal (not shown). A laminate is constituted by a first thin plate (a current collector aluminum foil), a second thin plate (a current collector copper foil), and a separator interposed therebetween. The current collector aluminum foil is connected to the positive terminal. The current collector copper foil is connected to the negative electrode terminal. A metal oxide containing lithium (a positive electrode active material) is applied to the current collector aluminum foil. An organic material containing lithium (a negative electrode active material) is applied to the current collector copper foil.

In the portable telephone 1a configured as described above, first, the battery 21 is fixed to the back case 6 by the double-sided tapes 12a and 12b, so that a battery pack case that covers the battery as in the related art is not required. . Therefore, the space for accommodating the battery can be reduced, so that the size and weight of the mobile phone 1a can be reduced. In addition, since the battery 21 is fixed to the back case 6 by the double-sided tapes 12a and 12b instead of the conventional battery pack case, the battery 21 can be fixed to the back case 6 at low cost. Further, the battery 21 has two portions of the double-sided tape 12
It is fixed to the back case 6 by a and 12b. As a result, the battery 21 is securely fixed to the rear case 6, and there is no occurrence of a contact failure between the positive terminal and the negative terminal of the battery and the main circuit of the mobile phone 1a.

When the battery 21 is placed on the inner surface 6a, double-sided tapes 12a and 12b are provided at portions where the inner surface 6a abuts on the ends of the battery 21. That is, battery 2
1 and the inner surface 6a are provided with the double-sided tapes 12a and 12b at the portion closest to the inner surface 6a.
The battery 21 can be reliably fixed by 2b.

When a person manually presses the operation key 5 to input information, a force of about 20 to 30 N is applied to the battery 12 via the sheet 7, the board 8, and the printed board 9. However, since the metal housing 13 has a large mechanical strength, the metal housing 13 does not bend even when receiving a force from the resistors 10 and 11. As a result, the battery core 15
There is no deflection, no failure such as a short circuit occurs inside the battery 21, and the reliability of the mobile phone 1a is increased.

(Embodiment 2) FIG. 3 is a sectional view of a portable telephone according to Embodiment 2 of the present invention. Referring to FIG. 3, battery 1b according to Embodiment 2 of the present invention includes:
It has a battery 24 having a different configuration from the battery 21 shown in FIG.
The battery 24 has a battery core 15 and a laminated film 14 as a wrapper-like exterior member. The laminate film 14 is provided so as to surround the battery core 15.
The laminate film 14 has a three-layer structure of a resin layer 14a, an aluminum layer 14b, and a resin layer 14a. The resin layer 14a is in direct contact with the double-sided tapes 12a and 12b. The resin layer 14a is made of a polymer resin such as polypropylene and polyethylene. The laminate film 14 is made of a composite material in which an aluminum layer 14b is sandwiched between two resin layers 14a. The thickness of the laminate film 14 is 300 μm or less.

In the portable telephone 1b configured as described above, the battery 24 is fixed to the back case 6 by the double-sided tapes 12a and 12b, so that a battery pack case that covers the battery as in the related art is not required. Therefore, the space for accommodating the battery can be reduced, so that the size and weight of the mobile phone 1b can be reduced. Also, instead of the conventional battery pack housing, double-sided tapes 12a and 12a
Since the battery 24 is fixed to the rear housing 6 by 2b, the battery 24 can be fixed to the rear housing 6 at low cost.
Further, the battery 24 is fixed to the rear housing 6 by the double-sided tapes 12a and 12b at two places. As a result, the battery 24 is securely fixed to the rear case 6, and there is no occurrence of poor contact between the positive terminal and the negative terminal of the battery and the main circuit of the mobile phone 1b.

When the battery 24 is placed on the inner surface 6a, the double-sided tapes 12a and 12b are provided at the portions where the inner surface 6a and the ends of the battery 24 are in contact with each other. Can be fixed.

(Embodiment 3) FIG. 4 is a sectional view of a portable telephone according to Embodiment 3 of the present invention. Referring to FIG. 4, mobile phone 1c has double-sided tapes 22a and 22b as support members. This double-sided tape 22a
And 22b are the double-sided tapes 12a and 12b shown in FIG.
2b. That is, the double-sided tapes 22a and 22a
b is disposed in a space formed between the inner surface 6a of the rear housing 6 and the operation keys 5 and supports the battery 21 from below.

The portable telephone 1c thus configured has the same effect as the portable telephone 1a shown in FIG. Further, since the double-sided tapes 22a and 22b are formed in the space formed between the inner surface 6a of the rear housing 6 and the operation keys 5, no waste of space occurs. Therefore, the size of the mobile phone 1c can be further reduced. Further, since the double-sided tapes 22a and 22b are provided so as to fill the space formed between the battery 21 and the inner surface 6a, the pressure is applied to the battery 21 by manually pressing the operation key 5 to input information. Battery 21
Deflection can be prevented. As a result, battery 2
1 does not cause a failure such as a short circuit, and the reliability of the mobile phone 1c is improved. Further, even if the battery 21 is thinned,
However, there is an effect that bending is difficult.

(Embodiment 4) FIG. 5 is a sectional view of a portable telephone according to Embodiment 4 of the present invention. Referring to FIG. 5, mobile phone 1 according to a fourth embodiment of the present invention.
In d, the structure of the battery 24 is different from that of the battery 21 shown in FIG. That is, the battery 24 shown in FIG.
4, the battery core 15 is covered with the laminate film 14.

The portable telephone 1d thus configured has the same effect as the portable telephone 1c shown in FIG.

(Embodiment 5) FIG. 6 is a plan view of a battery according to Embodiment 5 of the present invention. Referring to FIG. 6, battery 31 according to the fifth embodiment of the present invention includes a battery core 15, a metal casing 13 covering battery core 15, and a positive electrode terminal 17 electrically connected to battery core 15. And a negative electrode terminal 18 and a metal plate 16 as a conductive member attached to the metal housing 13.

The battery core 15 and a part of the positive electrode terminal 17 and a part of the negative electrode terminal 18 are covered by the metal casing 13 so as to be sealed. The battery core 15 has a positive terminal 17 and a negative terminal 1.
8 are electrically connected to each other. The positive electrode terminal 17 and the negative electrode terminal 18 are formed so as to extend in one direction in parallel with each other. Both the positive terminal 17 and the negative terminal 18 are electrically connected to terminals of the mobile phone. The metal casing 13 has a plate-shaped metal plate 16 made of an aluminum alloy.
Has been fixed. The flat area of the metal plate 16 is the battery core 15
Greater than the surface area. Therefore, the metal plate 16 functions to electromagnetically shield the battery core 15.

FIG. 7 is a sectional view of a portable telephone and a battery according to the fifth embodiment of the present invention. Referring to FIG. 7, a mobile phone 1e according to a fifth embodiment of the present invention is configured as shown in FIG.
And a battery 31 indicated by. The battery 31 is different from the battery 21 shown in FIG. 4 in which such a metal plate is not provided in that the metal plate 16 is provided on one surface of the metal housing 13. The metal plate 16 is a metal housing 1 facing the operation keys 5.
3 surface. As a material of the metal plate 16, a light-weight, high-strength and conductive material, for example, an aluminum alloy is preferable. Further, the metal plate 16 can be covered with an organic resin or the like.

In the battery 31 configured as described above, when a person presses the operation key 5 when inputting information and the pressure is applied to the battery 31, the metal plate 16 disperses the load. The battery has high reliability without causing a short circuit inside.

Further, the portable telephone 1 constructed as described above
In e, the same effects as those of the mobile phone 1c shown in FIG. 4 are obtained. Furthermore, the portable telephone 1e using the battery 31 is a highly reliable portable information terminal because the failure of the battery 31 hardly occurs as described above. Further, since the metal plate 16 has an electromagnetic shielding effect, the battery core 15 does not affect the electromagnetic waves transmitted and received by the mobile phone 1e.

(Embodiment 6) FIG. 8 is a plan view of a battery according to Embodiment 6 of the present invention. Referring to FIG. 8, battery 32 according to Embodiment 6 of the present invention includes a battery core 15 and a laminated film 1 covering battery core 15.
4 and a positive electrode terminal 17 electrically connected to the battery core 15
And a negative electrode terminal 18, and a metal plate 16 as a conductive member attached to the laminate film 14.

Battery core 15, metal plate 16, positive electrode terminal 17
The negative terminal 18 is the same as that shown in FIG. Battery core 15, positive electrode terminal 17 and negative electrode terminal 18
Is covered so that the laminate film 14 seals. The laminated film 14 has the same structure as the laminated film 14 shown in FIG.

FIG. 9 is a sectional view of a mobile phone and a battery according to the sixth embodiment of the present invention. Referring to FIG. 9, a mobile phone 1f according to a sixth embodiment of the present invention
And a battery 32 indicated by. The battery 32 is different from the battery 24 shown in FIG. 5 in which such a metal plate is not provided in that the metal plate 16 is provided on one surface of the laminate film 14. The metal plate 16 is attached to a surface of the laminate film 14 facing the operation key 5.

The battery 32 configured as above has the same effects as the battery 31 described in the fifth embodiment.
Further, mobile phone 1 according to Embodiment 6 of the present invention.
f has the same effect as that of the mobile phone 1e shown in FIG.

Although the embodiment of the present invention has been described above, the embodiment shown here can be variously modified. First, the laminate film has a three-layer structure, but the number of layers is not limited to three, and more layers may be provided.

Further, as the material of the positive electrode terminal and the negative electrode terminal, ordinary conductive materials such as aluminum alloy, copper and iron can be used.

Further, either one of the positive electrode terminal and the negative electrode terminal may be electrically connected to the aluminum layer in the laminate film. Further, one of the positive electrode terminal and the negative electrode terminal may be electrically connected to the metal housing.

Although a portable telephone has been described as a portable information terminal, it may be used for a notebook computer or a video tape recorder.

Further, the case where the battery is used as a lithium secondary battery has been described. However, the present invention is not limited to this, and the present invention may be applied to other secondary batteries, for example, nickel cadmium batteries. Further, the present invention can be applied to a primary battery.

It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0053]

According to the first to eighth aspects of the present invention, a portable information terminal that can be reduced in size and weight can be provided.

According to the ninth aspect of the present invention, the portable information terminal can be reduced in size and weight, and a highly reliable battery can be provided without failure such as an internal short circuit.

[Brief description of the drawings]

FIG. 1 is a plan view of a mobile phone according to Embodiment 1 of the present invention.

FIG. 2 is a view showing a cross section viewed along the line II-II in FIG. 1;

FIG. 3 is a sectional view of a mobile phone according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a mobile phone according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a mobile phone according to a fourth embodiment of the present invention.

FIG. 6 is a plan view of a battery according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of a mobile phone and a battery according to a fifth embodiment of the present invention.

FIG. 8 is a plan view of a battery according to a sixth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a mobile phone and a battery according to Embodiment 6 of the present invention.

[Explanation of symbols]

1a to 1f Mobile phone, 2 cases, 5 operation keys, 6
Back housing, 6a Inner surface, 12a, 12b Double-sided tape, 13 Metal housing, 14 Laminated film, 15
Battery core, 21, 24, 31, 32 batteries.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B011 DA06 DB16 EA04 EA05 EA10 5H040 AA01 AS13 AT04 AY05 CC28 CC35 5K023 AA07 BB03 GG04 HH07 LL04 LL05 LL06 QQ02 QQ05

Claims (9)

[Claims] 1. A main body, an information input member attached to the main body for inputting information, a battery positioned to face the information input member, and a battery attached to the main body and holding the battery A portable information terminal, comprising: a holding member provided so as to face the information input member, and a support member provided between the battery and the holding member to fix the battery to the holding member. 2. The portable information terminal according to claim 1, wherein said support member is bonded to said battery and said holding member. 3. The portable information terminal according to claim 2, wherein said support member includes a plurality of said support members for fixing said battery at two or more locations. 4. The surface of the holding member facing the battery is a curved surface that forms a space between the holding member and the information input member, and when the battery is placed on the curved surface of the holding member. The support member is provided at a portion where the curved surface and an end of the battery are in contact with each other.
The portable information terminal according to any one of the above. 5. The battery according to claim 4, wherein the battery includes a power generating element for generating electric power, and a metal housing surrounding the power generating element.
Mobile information terminal described in. 6. The surface of the holding member facing the battery is a curved surface that forms a space between the holding member and the information input member, and is formed in a space formed between the curved surface and the battery. The portable information terminal according to any one of claims 1 to 3, wherein the support member is provided. 7. The battery includes: a power generating element for generating electric power; and a wrapping-shaped exterior member surrounding the power generating element.
The portable information terminal according to claim 6. 8. The portable information terminal according to claim 1, further comprising a conductive member positioned between said battery and said information input member. 9. A battery mounted on a portable information terminal including a main body and an information input member attached to the main body for inputting information, the battery being positioned to face the information input member. A battery comprising: a power generating element that generates electric power; an exterior member that covers the power generation element; and a conductive member attached to a surface of the exterior member that faces the information input member.