JPH11339741A - Portable equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a connecting structure of an equipment main body and a battery pack, and miniaturize the equipment main body and the battery pack. SOLUTION: A lithium ion battery cell 30 and a protective circuit substrate 40 are stored in a battery pack 10. Land parts 120-150 are disposed in the protective circuit substrate 40, and terminal inserting holes 220 to 250 are formed in response to the land parts 120-150 in a lower case 210 of the battery pack 10. On the other hand, spring terminals are disposed in response to the terminal inserting holes 220-250 in the main body, the battery pack 10 is attached to the main body, and thereby spring terminals are brought into contact with the land part 120-150 bypassing the terminal inserting holes 220-250, and then current-carrying is performed between the battery pack 10 and the main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various portable devices having a device body case formed to be portable and a battery pack case detachably mounted on the device body case.

[0002]

2. Description of the Related Art Conventionally, various types of portable devices driven by a battery have been provided. Some batteries are built in the main body of the device, and some can replace battery cells such as dry batteries. However, when a mobile phone or a video camera is a device that consumes a large amount of power relative to the battery capacity, such as a notebook personal computer, a secondary battery that can be charged and discharged many times is often used. Among them, many battery cells are housed in a hard case to form a battery pack, which is easily detachable from a device body. In this case, a spring terminal or a connector connected to the device main body is required to supply power from the battery pack to the device main body or to send a signal.

[0003]

However, since there is a demand to make the battery pack as small as possible, a method of fixing a terminal plate which can be made small to a battery pack case is generally adopted. However, as the size of the battery pack becomes smaller, the terminal plate cannot be fixed in a sufficient space, and the wiring space required for connection between the terminal plate and the battery cell or connection with the circuit board that controls the battery cell also becomes less. ing.

Similarly, downsizing of the device main body is often required, and it has become difficult to secure space for electrode terminals on the device main body side. Further, the terminal plate or the counterpart spring terminal is generally held by a molded part, and the molded part is fixed to the battery case. Then, a terminal plate, a spring terminal, and a mold for a molded part are required, which causes an increase in cost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable device capable of simplifying a connection structure between a device body and a battery pack and reducing the size of the device body and the battery pack.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a portable device having a portable device main body case and a battery pack case detachably mounted on the main device case. When the device body case and the battery pack case are joined, they are provided on opposing surfaces of both cases joined to each other,
Connecting means for connecting wirings in the two cases, wherein the connecting means is a land portion formed by a conductive pattern on a printed wiring board disposed in one of the device body case and the battery pack case. A plurality of first electrode portions arranged at positions facing the opposed surface, and an insertion hole portion provided corresponding to the first electrode portion on the opposed surface of the one case; The first case is connected to a printed circuit board provided in one of the other case of the device body case and the battery pack case, protrudes from an opposing surface of the other case, and passes through the insertion hole of the one case. And a plurality of second electrode portions formed of electrode pieces in contact with the electrode portions.

In the portable device of the present invention, first and second connections for connecting the wiring between the device body and the battery pack are made.
The first electrode portion is formed by a land portion formed by a conductive pattern on a printed wiring board arranged in one case, and has a configuration excluding the conventional electrode plate terminal. Further, the second electrode portion of the other case is formed of an electrode piece that comes into contact with the first electrode portion through the insertion hole of the one case. With such first and second electrode portions, the electrode plate of one case can be eliminated,
Since the electrode arrangement structure in one case can be simplified and the space for it can be reduced, the size of the one case can be reduced. Moreover, the wiring between each case can be connected effectively by the first and second electrode portions.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a portable device according to the present invention will be described below. FIG. 1 is an exploded perspective view showing a first specific example of a battery pack provided in a portable device according to the present invention, and FIG. 2 is a first specific example of a portable device main body to which the battery pack shown in FIG. 1 is mounted. It is a perspective view showing an example. As shown, this example is an example applied to a mobile phone as a portable device.

In FIG. 1, a lithium ion battery cell 30 and a protection circuit board 40 are housed in an upper case 20 (case main body) of a battery pack 10. That is,
The lithium ion battery cell 30 is formed in a rectangular plate shape having a thickness and a width corresponding to the upper case 20, and is arranged so as to fill approximately 80% of the space in the upper case 20. The protection circuit board 40 is a printed wiring board on which a battery protection circuit is mounted, and is disposed in a space of the upper case 20 except for the lithium ion battery cells 30.

The positive electrode 50 of the battery cell 30 and the land 60 of the protection circuit board 40 are connected by a tab 70 by welding or soldering. Further, the negative electrode 80 of the battery cell 30 and the land 90 of the protection circuit board 40 are also connected to the tab 10.
0 indicates connection using welding or soldering. Also,
On the front side of the protection circuit board 40, electric parts 110 such as ICs and resistors are mounted. Land portions 120 to 150 are formed on the back side of the protection circuit board 40.
Here, the land 120 is a positive electrode terminal, and the land 130
, A land portion 140 is used as a control terminal, and a land portion 150 is used as a temperature terminal.

The upper case 20 is provided with a rib 200 for determining the height of the protection circuit board 40. Then, the protection circuit board 40 is placed on the rib 200 and positioned in the height (thickness) direction, and both edges of the protection circuit board 40 are aligned with the inner peripheral edge of the upper case 20. The upper case 20 can be easily assembled by positioning it in the direction. Then, the lower case 210 is added to the block of the upper case 20 thus assembled.
(Cover body), and the upper case 20 and the lower case 210 are joined by, for example, ultrasonic welding.

Positioning holes 160 to 190 are formed at four corners of the protection circuit board 40, and the positioning holes 16 of the protection circuit board 40 are formed in the lower case 210.
Four conical ribs 260 to 290 are provided so as to correspond to 0 to 190, respectively. Therefore, when the lower case 210 is put on the upper case 20, the positioning can be easily performed using the positioning holes 160 to 190 and the conical ribs 260 to 290 as guides.

Further, terminal insertion holes 220 to 250 are formed in the lower case 210 at positions overlapping the land portions 120 to 150 of the protection circuit board 40. Therefore, the land portions 120 to 150 of the protection circuit board 40 are arranged so as to face the outside through the terminal insertion holes 220 to 250.

The device main body 300 shown in FIG. 2 has a battery pack 1 on a part of an outer portion of a device main body case 300A.
It has a mounting section 304 for mounting 0. The battery pack 10 includes a claw 4 formed at the tip of the lower case 210.
6 with the engaging portion 302 of the device main body case 300A, and the mounting portion 304 of the device main body case 300A.
The outer peripheral portion of the lower case 210 is fitted to the inner peripheral edge portion 304A of the lower case 210 so as to be integrally attached to the device main body 300.

The device body 300 is provided with four spring terminals 310 to 340 at positions corresponding to the four terminal insertion holes 220 to 250 when the battery pack 10 is mounted. Each spring terminal 310
Reference numeral 340 denotes a needle-shaped or plate-shaped spring member that is curved in a U-shape, and is an electrode terminal and a signal terminal on the device main body 300 side. Moreover, each spring terminal 310-340
Is connected to a circuit board 350 in the device main body 300, is held by an insulating mold body 352, and protrudes from a surface on which the battery pack 10 is mounted.

When the battery pack 10 is mounted on the mounting portion 304 of the device main body case 300A, the spring terminals 310 to 340 come into contact with the lands 120 to 150 through the terminal insertion holes 220 to 250. At this time, an appropriate contact state can be obtained by the spring force of the spring terminals 310 to 340.

As described above, in this example, the protection circuit board 4
By forming the lands 120 to 150 on the substrate 0, the insulative molded component for holding the electrode terminals, which has been conventionally required, can be substituted by the protection circuit board. When the upper case 20 is put on the lower case 210, the lower case 20
Are inserted into the positioning holes 160 to 190 of the protection circuit board 40.
The position of 0 is easily determined, and the positions of the lands 120 to 150 and the terminal insertion holes 220 to 250 can be accurately determined. Therefore, conventionally, a step of connecting the battery cell and the electrode terminal was necessary, but in this example, the battery cell 30 and the protection circuit board 4 are connected.
Only the tabs 100 need to be connected between the zeros, and the assembly operation can be simplified.

FIG. 3 is an exploded perspective view showing a second specific example of the battery pack provided in the portable device according to the present invention. FIG. 4 is a perspective view of the portable device main body to which the battery pack shown in FIG. It is a perspective view which shows the specific example of 2. In addition, about the structure similar to the apparatus shown to FIG. 1 and FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As shown in FIG. 4, in the portable device of this embodiment, four land portions 370 to 400 are formed on a circuit board 360 of the device body 300 to form electrodes, and the device body case 3
The cover 410 constituting the mounting section 304 of 00A is put on. The cover 410 has four terminal insertion holes 460 to 490 corresponding to the lands 370 to 400. On the other hand, as shown in FIG. 3, a molded body 462 holding four spring terminals 420 to 450 is fixed to the upper case 20 of the battery pack 10 separately from the protection circuit board 40. The spring terminals 420 to 450 and the molded body 462 have the same configuration as the above-described spring terminals 310 to 340 and the molded body 452.

That is, in this embodiment, the battery pack 10
Are the spring terminals 420 to 450, and the land terminals 370 to 400 formed on the circuit board 360 are directly used as the electrode terminals of the device main body 300. That is, the relationship is exactly opposite to the example shown in FIGS. Therefore, the land portion 3 of the circuit board 360 on the device main body 300 side is used.
The cover body 410 is put on the 70 to 400, and the terminal insertion holes 460 to 490 and the lands 370 to 400 are positioned. Then, the battery pack 10 is connected to the device body 30.
If it is attached to 0, the land portions 370 to 400 come into contact with the spring terminals 420 to 450 of the battery pack 10 and are electrically connected.

In the example shown in FIGS. 1 and 2 described above, the lands 120 to 150 are provided on the back side of the protection circuit board 40.
Is formed, and the electric component 110 is not mounted on the back side.
When mounted on the back side, the electric component 110 collides with the lower case 210, the lands 120 to 150 are pushed down,
The distance from the spring terminals 310 to 340 of the device main body 300 becomes too large, which causes a contact failure. When the electric component 110 is mounted on the front side of the protection circuit board 40, the electrode terminal of the battery pack is replaced by a spring terminal or the lower case 210 is connected to the electric component 110, as shown in FIGS. It is necessary to have a complicated shape that expands only the part that hits. Therefore, the electrical component 11 is placed on the side of the circuit board where the lands 120 to 150 or the lands 370 to 400 are located (the back side in the example shown in FIGS.
By not mounting 0, the shape and assembly are facilitated.

Further, the present invention can be variously modified without being limited to the above-described example. For example, the battery cell need not be limited to a lithium ion battery, but may be a lead battery, a nickel cadmium battery, a nickel hydride battery, or the like. However, in this case, the protection circuit board 40 is often unnecessary. However, even if a protection circuit board is not required,
By providing a wiring board on which the electric component 110 is not mounted, a land portion and a wiring pattern are formed, and the land portion can be used as an electrode as it is.

The wiring board on which the lands are provided does not need to be the protection circuit board 40 for lithium ions, and the same applies to other wiring boards for displaying the remaining capacity. In addition, the number of lands 120 to 150 is not limited to four, and may be used for other electrical connections.
Further, needless to say, the portable device does not need to be a mobile phone, but may be a device such as a video camera or a notebook personal computer that can be lifted with one hand by a battery-driven device. However, since a mobile phone is required to be particularly lightweight and compact, the present invention can be applied most effectively.

The formation of the lands on the printed wiring board may be carried out by general copper plating. However, in order to reduce the contact resistance of the electrodes or to improve the wear resistance, a method such as plating on the copper plating is used. For example, a nickel coat or a gold coat may be applied.

[0025]

As described above, in the portable device according to the present invention, as a connecting means for connecting the wiring between the device main body and the battery pack, the print device arranged in one of the device main body case and the battery pack case is used. The land portion on the wiring board is used as a first electrode portion, and an insertion hole portion corresponding to the first electrode portion is provided in one of the cases.
The second electrode portion made of an electrode piece protruding from the other case is configured to be in contact with the first electrode portion through the insertion hole of the one case.

For this reason, the electrode plate in one case can be eliminated, the electrode arrangement structure in this case can be simplified, the space for it can be reduced, and the device can be downsized. Further, the number of steps for connecting the electrode plates can be reduced, the assembling operation can be simplified, and a mold member for holding the electrode plates in an insulated state is not required, and the structure can be simplified by reducing the number of parts.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first specific example of a battery pack provided in a portable device according to the present invention.

FIG. 2 is a perspective view showing a first specific example of a portable device main body to which the battery pack shown in FIG. 1 is mounted.

FIG. 3 is an exploded perspective view showing a second specific example of the battery pack provided in the portable device according to the present invention.

FIG. 4 is a perspective view showing a second specific example of the portable device main body to which the battery pack shown in FIG. 3 is mounted.

[Explanation of symbols]

10 ... battery pack, 20 ... upper case, 30 ...
Lithium ion battery cell, 40 ... protection circuit board, 11
0: electric parts, 120 to 150: land part, 210
... Lower case, 220 to 250 ... Terminal insertion hole, 300
... Device body, 310 to 340.

Claims (12)

[Claims] 1. A portable device having a device body case configured to be portable and a battery pack case detachably attached to the device body case, wherein the device body case and the battery pack case are joined. In this case, the electronic device further includes a connection unit provided on the facing surfaces of the two cases that are joined to each other, and connecting wirings in the two cases. A plurality of first electrode portions each including a land portion formed of a conductive pattern on a printed wiring board disposed in a case and disposed at a position facing the opposing surface; An insertion hole portion provided corresponding to the electrode portion of the device; and a plug provided in one of the other device case and the battery pack case. A plurality of second electrode portions each including an electrode piece protruding from the opposing surface of the other case and coming into contact with the first electrode portion through the insertion hole of the one case; A portable device comprising: 2. The portable device according to claim 1, wherein an electrode piece forming the second electrode portion has a certain elasticity and elastically contacts the first electrode portion. 3. An electrode piece forming the second electrode portion,
3. The portable device according to claim 2, wherein the portable device is formed in a leaf spring shape or a wire spring shape curved in a substantially U shape. 4. The battery pack according to claim 1, wherein the one case is a battery pack case, and the printed wiring board disposed in the one case is a protection circuit board on which a protection circuit for the battery is mounted. Item 4. The portable device according to Item 1. 5. The portable device according to claim 1, wherein the first and second electrode portions include a positive terminal, a negative terminal, a control terminal, and a temperature terminal of the battery. 6. The portable device according to claim 1, wherein an electronic component is mounted on a printed wiring board provided with a land portion of the first electrode portion. 7. A printed wiring board provided with a land portion of the first electrode portion has no electronic component mounted on a back surface provided with the land portion, and has an electronic component mounted only on an opposite surface. The portable device according to claim 6, wherein 8. The portable device according to claim 1, wherein a land portion of the first electrode portion is formed by coating a copper foil pattern with nickel or gold. 9. An inner wall portion of the one case has a rib for positioning a printed wiring board provided with the first electrode portion in a thickness direction, and the printed wiring board is guided by the rib as a guide. The portable device according to claim 1, wherein the portable device is assembled. 10. The case body, which houses a printed wiring board provided with the first electrode portion,
Having the insertion hole portion, having a cover body for closing the case main body, and having a plurality of positioning holes for positioning on the printed wiring board provided with the first electrode portion,
The cover body is provided with a projection that engages with the positioning hole, and the positioning hole and the projection are engaged to position the printed wiring board in a plate surface direction, thereby assembling the printed wiring board. The portable device according to claim 1, wherein: 11. The portable device according to claim 1, wherein the portable device is a portable telephone terminal device. 12. The portable device according to claim 1, wherein the portable device is a portable information processing terminal device.