JP5290506B2 - Battery pack and electronic equipment - Google Patents

Description

  The present invention relates to a battery pack and an electronic device used as a power source for driving an electronic device.

Conventionally, battery packs are used as driving power sources in portable electronic devices such as cellular phones.
The battery pack accommodates a unit cell and a circuit board on which a protection circuit, an electrode terminal, and the like are mounted between an inner case and an outer case. As a method for fixing the inner case and the outer case, a method such as ultrasonic welding is used. (For example, refer to Patent Document 1).
JP 2005-317391 A

  However, in conventional ultrasonic welding, a welding rib is formed at the tip of the side wall of either the inner case or the outer case, and this welding rib is provided at the tip of the side wall of the other case. Since vibration is applied by applying an ultrasonic horn in a state of being in contact with the metal, there is a high risk that the welding rib will come off the other welding surface when a large ultrasonic energy is applied. For this reason, it is difficult to apply large ultrasonic energy, and it has been difficult to reliably weld the entire circumference.

  The subject of this invention is welding the case member which accommodates a battery reliably, and improving the waterproofness of a battery pack.

In order to solve the above problems, the invention described in claim 1 is a battery and a charging unit provided at one end of the battery covered with a first case member and a second case member, and integrated by a welding device. becomes Te, the battery is a battery pack accommodated in the electronic equipment for supplying power, before Symbol first case member and said second case member is flange formed in contact with each other over the entire periphery, whereas the flanges are welded rib formed over the entire circumference, the other flange groove is formed over the entire circumference, in a state in which the welding rib is inserted into the groove, the said weld rib in the one flange other the clamping in the groove and said welding apparatus in the flange, the one flange and the other flange are welded to abut, the first case member or the second At least one outer peripheral surface of the case member is provided with a waterproof ring over the entire periphery, and a frame member that holds the waterproof ring is fixed to the outer peripheral surface over the entire periphery. Is sandwiched between the outer peripheral surface and the electronic device in a state of being accommodated in the electronic device.

  The invention according to claim 2 is the battery pack according to claim 1, wherein a terminal provided in the battery is exposed to at least one of the first case member or the second case member. An opening is provided, and the peripheral edge of the opening and the peripheral edge of the terminal are sealed with a waterproof member.

According to a third aspect of the invention, a battery pack according to claim 1 or 2, wherein the first case member or the second case member, the fixing portion which is fixed to the front Symbol electronic equipment Is provided.

The invention described in claim 4 is the battery pack according to claim 1 or 2, before Symbol first case member or the second case member, housing part for housing the battery pack of the electronic apparatus It is characterized by being provided integrally with a battery cover that covers the battery.

  A fifth aspect of the present invention is an electronic apparatus comprising the battery pack according to any one of the first to fourth aspects.

  ADVANTAGE OF THE INVENTION According to this invention, the case member which accommodates a battery can be welded reliably, and the waterproofness of a battery pack can be improved.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 and 2 show a mobile phone as an embodiment of an electronic apparatus to which the present invention is applied. A first casing 1 and a second casing 2 are foldable with each other via a hinge portion 3. It is connected.
A battery housing recess 4 is provided in the first housing 1, and a battery pack 5 is stored in the battery housing recess 4.

  3 shows a disassembled state of the battery pack 5, and FIG. 4 shows a central cross section in the vertical and horizontal directions of the battery pack 5. The battery pack 5 includes a battery 51, an outer case 52, and an inner case 53 as shown in the figure. The battery main body part 50 which consists of, the frame member 54, the waterproof ring 55, and the battery cover 56 are comprised.

  The battery 51 has a pair of battery terminals 51 a on the inner case 53 side and a pair of charging terminals 51 b at the ends, and is covered with an outer case 52 and an inner case 53.

  The outer case 52 is provided with a recess 52 a for accommodating the battery 51 on the inner case 53 side. A flange 52d is formed at the peripheral edge of the recess 52a. A groove 52e into which the welding rib 53e of the inner case 53 is inserted is provided on the surface on the inner case 53 side of the flange portion 52d. The width of the groove 52e is slightly wider than the width of the welding rib 53e, and the depth is slightly lower than the height of the welding rib 53e.

  In addition, a pair of openings 52 b that expose the charging terminals 51 b of the battery 51 are provided at the end of the outer case 52. The peripheral edge of the opening 52b and the peripheral edge of the charging terminal 51b are sealed with a frame-shaped waterproof member 57 (for example, a waterproof double-sided tape). For this reason, it is possible to prevent water from entering the battery main body 50 from the opening 52b.

  The inner case 53 is provided with a recess 53 a for accommodating the battery 51 on the outer case 52 side. The recess 53a is provided with a pair of openings 53b that expose the battery terminals 51a. The peripheral edge of the opening 53b and the peripheral edge of the battery terminal 51a are sealed with a frame-shaped waterproof member (for example, a waterproof double-sided tape). For this reason, it is possible to prevent water from entering the battery main body 50 from the opening 53b.

A flange 53d is formed at the peripheral edge of the recess 53a. A welding rib 53e to be inserted into the groove 52e of the outer case 52 is provided along the peripheral edge on the surface of the flange portion 53d on the outer case 52 side. With the welding rib 53e of the inner case 53 inserted into the groove 52e of the outer case 52, the outer case 52 and the inner case 53 are united by ultrasonic welding.
Further, an end portion of the inner case 53 has a support portion 53c that supports the charging terminal 51b of the battery 51 from the back side.

  Here, a method of welding the outer case 52 and the inner case 53 will be described. First, the batteries are accommodated in the recesses 52a and 53a of the outer case 52 and the inner case 53, and the flange portions 52d and 53d are overlapped so that the welding rib 53e is inserted into the groove 52e.

Next, the flange portions 52d and 53d are sandwiched by an ultrasonic horn (not shown), and a high frequency is applied to the ultrasonic horn to apply vibration to the flange portions 52d and 53d. Then, the contact portion between the bottom surface of the groove 52e and the welding rib 53e is heated by frictional heat due to vibration, and the welding rib 53e is melted.
When the application of the high frequency to the ultrasonic horn is stopped, the temperature of the melted portion is lowered, and the welding rib 53e and the groove 52e are welded.

  Thus, since the flange portions 52d and 53d are overlapped and sandwiched between the ultrasonic horns with the welding rib 53e inserted into the groove 52e, the welding rib 53e may be detached from the groove 52e even when a large vibration is applied. Absent. Accordingly, the outer peripheral portions of the outer case 52 and the inner case 53 can be reliably welded, and water can be prevented from entering the battery main body 50.

The frame member 54 is provided with a waterproof ring 55 made of an O-ring on the outer peripheral surface of the inner case 53, and is bonded to the outer peripheral surface of the inner case 53 after ultrasonically welding the peripheral portion of the inner case 53 to the outer case 52. ing.
The waterproof ring 55 is, for example, an O-ring, and is sandwiched between the inner case 53 and the frame member 54 as shown in FIG.

The battery cover 56 is provided with a concave portion 56 a in which the battery main body 50 is accommodated from the outer case 52 side in the center, and is adhered to the outer case 52 by a double-sided tape 59.
As shown in FIG. 4, the battery cover 56 is provided with an inclined surface 56f from the bottom of the recess 56a toward the outer periphery. When the battery cover 56 is bonded to the outer case 52, the inclined surface 56 f plays a role of covering the step due to the flange portion 52 d of the outer case 52.
The recess 56a is provided with an opening 52b and an opening 56b exposing the charging terminal 51b.

  The battery lid 56 has a pair of semicircular cutouts 56c corresponding to a pair of lock operation members 6 provided along one side of the battery housing recess 4 of the first housing 1, and a pair of oppositely provided cutouts 56c. And an engaging projection 56d. The pair of engaging convex portions 56d engage with engaging concave portions (not shown) provided in the middle case 13 when the battery pack 5 is attached to the battery housing concave portion 4. Further, the semicircular cutout 56c is formed with a groove 56e that engages with the lock claw 61 of the lock operation member 6 to be rotated.

FIG. 5A shows a central cross section in the vertical and horizontal directions of the first casing 1 in which the battery pack 5 is stored in the battery storing recess 4, and the first casing 1 has an upper case as shown in the figure. 11, the lower case 12 and the middle case 13 are combined by screwing.
As shown in FIGS. 1 and 2, the battery housing recess 4 formed in the middle case 13 is exposed from the opening 14 formed in the lower case 12.

  A stepped portion 41 is formed on the inner wall surface of the battery housing recess 4 over the entire circumference, and the opening 14 side is wider. When the battery pack 5 is attached to the battery housing recess 4, the waterproof ring 55 attached to the battery pack is pressed against the inner wall surface of the battery housing recess 4 on the opening 14 side of the step portion 41, so that the inside of the battery housing recess 4. It is designed to prevent water from entering. The battery housing recess 4 is provided with a pair of power connectors 42 at the bottom. The power connector 42 is connected to the battery terminal 51 a of the battery pack 5 and is exposed from an opening 43 formed at the bottom of the battery housing recess 4.

  The upper case 11 is provided with an operation key portion 7, and the key rubber 71 is provided with an integral waterproof packing portion 72. The waterproof packing portion 72 waterproofs the fitting portion between the upper case 11 and the middle case 13. In addition, a side key 8 is assembled to one side of the mating portion of the upper case 11 and the lower case 12, and an integral waterproof portion 82 is provided on the key rubber 81. The waterproof portion 82 waterproofs the through hole portion for the side key 8 formed on the side wall of the middle case.

In the above, the battery pack 5 has a pair of engaging projections 56d on one end side thereof inserted into the battery housing recess 4 of the first housing 1 from the opening 14, and the unillustrated engagement provided in the middle case 13. The pair of semicircular cutouts 56 c on the other end side are overlapped along the lock operation member 6 while being engaged with the joint recess.
Then, the battery pack 5 is loaded and held by rotating the pair of lock operation members 6 and engaging the lock claws 61 with the grooves 56e of the semicircular cutouts 56c.

In the above embodiment, the engagement convex portion 56d that engages with the engagement concave portion (not shown) provided in the first housing 1 and the one side of the battery housing concave portion 4 of the first housing 1 are provided. The battery lid 56 is provided with a fixing mechanism for fixing the battery pack 5 in a state in which the battery pack 5 is mounted in the battery housing recess 4, such as a groove 56 e in which the lock claws 61 of the pair of lock operation members 6 provided are engaged. However, these fixing mechanisms may be provided in the outer case 52 of the battery pack 5. FIG. 6 shows an example of this, and a pair of semicircular cutouts 52 f corresponding to the pair of lock operation members 6 and the lock of the lock operation member 6 are formed on one of the flange portions 52 d of the outer case 52 of the battery pack 5. A groove 52h for engaging the claw 61 is formed, and a pair of engaging convex portions 52g are formed on the opposite side. When the battery 51 is thin, as shown in FIG. 7, the outer case 52 of the battery pack 5 is formed on a flat plate, and the flange 52d has a semicircular notch 52f and a groove similar to those shown in FIG. By forming 52h and the engaging convex part 52g, the battery cover 56 can also be eliminated.
In the above embodiment, the cellular phone is used. However, the present invention is not limited to this and may be a notebook PC, palmtop PC, PDA, or other portable electronic device. . In addition, it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS The structure of one Embodiment of the electronic device to which this invention is applied is shown, and it is a disassembled perspective view of a mobile telephone. In FIG. 1, it is the disassembled perspective view which looked at the battery pack from the back surface side. FIG. 3 is an exploded perspective view of the battery pack of FIGS. 1 and 2. (A) is a front view of a battery pack, (b) is a BB arrow sectional view of (a), (c) is a CC arrow sectional view of (a). (A), (b) is sectional drawing of the housing | casing which has a battery accommodating recessed part of FIG.1 and FIG.2. It is a disassembled perspective view of the modification of a battery pack. It is a disassembled perspective view of the further modification of a battery pack.

Explanation of symbols

4 Storage recess (storage)
5 Battery pack 51 Battery 52 Outer case (case member)
52d, 53d Flange 52e Groove 53 Inner case (case member)
53e welding rib 52b, 53b, 56b opening 56 battery cover 56d engagement convex part (fixing part)
56e Groove (fixed part)

Claims (5)

A battery and a charging unit provided at one end of the battery are covered with a first case member and a second case member and integrated by a welding device, and the battery is housed in an electronic device that supplies power. A pack,
Abutting flanges to each other over the entire circumference is formed before Symbol first case member and said second case member,
One flange is formed with welding ribs all around the circumference,
The other flange has a groove all around it,
In a state where the welding rib is inserted into the groove, the welding rib in the one flange and the groove in the other flange are sandwiched by the welding device, and the one flange and the other flange come into contact with each other. are welded to,
On at least one outer peripheral surface of the first case member or the second case member, a waterproof ring is disposed over the entire circumference,
A frame member that holds the waterproof ring is fixed to the outer peripheral surface over the entire circumference,
The battery pack, wherein the waterproof ring is sandwiched between the outer peripheral surface and the electronic device in a state where the battery is accommodated in the electronic device. At least one of the first case member or the second case member is provided with an opening for exposing a terminal provided in the battery,
The battery pack according to claim 1, wherein a peripheral edge of the opening and a peripheral edge of the terminal are sealed with a waterproof member.   The battery pack according to claim 1, wherein the first case member or the second case member is provided with a fixing portion that is fixed to the electronic device.   3. The battery according to claim 1, wherein the first case member or the second case member is provided integrally with a battery lid that covers a storage unit that stores a battery pack of the electronic device. pack.   An electronic apparatus comprising the battery pack according to claim 1.

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