JPH10334867A - Holding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten manufacturing time and maintenance time and reduce manufacturing cost and maintenance cost by omitting soldering of a terminal for use with a battery used in a small-sized electronic apparatus onto a printed wiring board. SOLUTION: A first terminal 3 for use with a battery which is made up of a wire rod for use as spring and forms bent parts 32 by bending, at a specified angle, tips of extension parts 33 extended at a specified angle from two lower ends of an approximately M-shape is inserted from under a battery housing part 21 into a first groove 22 and put to hold/lock with a tip 31 of a middle part of the approximately M-shape brought into contact with a projection part 23. When the printed wiring board 2 is pressed against by an upper case 2, the extension parts 33 and the bent parts 32 of the first terminal 3 for use with a battery which project under the battery housing part 21 are deflected due to elasticity and the bent parts 32 make contact with a first electrode 41 of the printed wiring board 2 and conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a battery accommodating portion of a small electronic device, and more particularly to a battery terminal for electrically connecting a battery, a battery terminal and a printed wiring board, and a holding structure thereof.

[0002]

2. Description of the Related Art Conventionally, when a battery terminal of a battery accommodating portion in a small electronic device is connected to a printed wiring board, a method of fixing the battery terminal to each electrode of the printed wiring board by soldering has been generally used. . Such a method is disclosed in
No. 45019. 5-4
The battery housing device disclosed in Japanese Patent No. 5019 is disclosed in FIG.
(A), a case 7 in which the battery 5 is housed,
The case 7 includes a terminal plate 11 provided at one end of the case 7 and a conical coil spring 12 provided at the other end.

The case 7 has grooves 71 formed on the outer surfaces at both ends. The printed wiring board 10 cut into a U-shape is inserted into the grooves 71, and the two are integrated. FIG.
As shown in (b), the terminal plate 11 is made of a plate material bent in an inverted U-shape, and its lead portion 111 is inserted into a hole 72 formed at one end of the case 7 so that the printed wiring board 1 is formed.
0 is soldered to the + side electrode. Also coil spring 1
2 is inserted into a hole 73 formed at the other end of the case 7, and the tip 121 is soldered to the negative electrode of the printed wiring board 10.

[0004]

In the conventional battery accommodating apparatus, the lead plate 11 of the terminal plate 11 is integrated with the terminal plate 11 inserted into a hole 72 formed in the case 7.
1 is soldered to the positive electrode of the printed wiring board 10, and the lead portion 121 of the coil spring 12 is printed while the coil spring 12 is inserted and integrated into the hole 73 formed in the case 7. Since the structure is soldered to the negative electrode of the wiring board, there is a problem that time is required for the soldering operation and the manufacturing cost of the small electronic device increases.

Further, since the terminal plate 11 and the coil spring 12 are soldered to the printed wiring board 10, the terminal plate 1
There is a problem that it is difficult to separate the printed circuit boards 1 and 12 from the case 7 and the printed wiring board 10 and each of them cannot be reused.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the manufacturing cost by eliminating the soldering work of the battery terminals to the printed wiring board and shortening the assembling work. It is an object of the present invention to provide a battery terminal of a small electronic device and a holding structure for the battery terminal, which enable reuse.

[0007]

A holding structure according to the present invention comprises a first case (2) and a second case fitted to the first case.
(1), and a printed wiring board (4) disposed inside the first and second cases, wherein the first case includes a battery accommodating portion (21) and the battery accommodating portion. An electrode mounting portion for mounting an electrode (3) connected to a battery housed in the battery, wherein the electrode extends to a surface constituting the battery housing portion when the electrode is disposed in the electrode mounting portion ( 3
3), wherein the printed wiring board has an electrode (4) of a board connected to the extension of the electrode, and when the first case and the second case are integrated, The extension of the electrode and the electrode of the substrate provided on the printed wiring board are pressed and connected by a surface constituting the battery housing.

As described above, in the present invention, when the case is integrated, the battery electrode is pressed by the surface constituting the battery housing portion, and the electrode is connected to the pattern of the printed wiring board.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a first embodiment of the present invention. FIG. 2 is an enlarged detailed view of the battery accommodating portion of FIG.
(A) shows a fitting state between the first battery terminal and the upper case, and (b) shows a state in which the battery is mounted in the battery accommodating portion and the + side electrode of the battery, the first battery terminal, and the printed wiring board. FIG. 4 is a diagram illustrating a state of conduction with a first electrode.

In FIG. 1, the case of a small electronic device comprises an upper case 2 and a lower case 1 made of a plastic composition. One end of a battery accommodating portion 21 provided in the upper case 2 has a first groove 22 for holding a first battery terminal 3 connected to a positive electrode of the battery, and a convex portion 23.
Are formed. The first battery terminal 3 is inserted into the first groove 22 from the lower side of the upper case 2, the vicinity of the front end 31 of the substantially M-shaped central portion is elastically bent, rides over the convex portion 23, and the front end 31 is convex. By contacting the upper side of the portion 23, the first battery terminal 3 is held and integrated with the upper case.

The first battery terminal 3 is formed by forming a spring wire having a circular cross section into a substantially M shape and extending a predetermined length from both ends thereof at a predetermined angle of 90 degrees or less (extended portion 33). A bent portion 32 which is a contact point with the first electrode 41 which is a positive electrode of the printed wiring board is provided at the tip, and the extension portion 33 and the bent portion 3 are provided.
By pressing the printed wiring board 2 with the upper case 2, conduction between the bent portion 32 of the first battery terminal 3 and the first electrode 41 of the printed wiring board 4 is ensured.

More specifically, as shown in FIG.
In the battery terminal 3, the M-shaped portion is held by the first groove 22, and the convex portion 23 further has a front end 31 of a substantially M-shaped central portion.
Abuts the first battery terminal 3 with the first groove 2.
2 is prevented from falling off, and is integrated into the battery housing 21.

In this state, the battery 5 is inserted into the battery housing 21.
When the upper case 2 is pressed against the printed wiring board 4, as shown in FIG. 2 (b), the extension portion 33 of the spring wire rod extended from the substantially M-shaped ends of the first battery terminal 3. And the bent portion 32 is bent by elasticity, and the two bent portions 32 come into contact with the first electrode 41 of the printed wiring board 4, and the battery 5, the first battery terminal 3, and the first The conduction with the electrode 41 is established.

The bent portion 32 of the first battery terminal 3
Since the first electrode 41 of the printed wiring board 41 has a smooth curved surface, corrosion of the first electrode 41 of the printed wiring board 41 due to scratches can be prevented, so that occurrence of poor conduction can be suppressed.

Next, a second embodiment of the present invention will be described. FIG. 3 is an exploded perspective view of a second embodiment of the present invention.
FIG. 4 is an enlarged detailed view of the battery accommodating portion of FIG. 3, and FIG. 4A shows a state in which the first battery terminal and the upper case are fitted to each other.
(B) is a diagram showing a state in which a battery is mounted in a battery housing portion and a conduction state is established between a positive electrode of the battery, a first battery terminal, and a first electrode of a printed wiring board.

In FIG. 3, the case of a small electronic device is composed of an upper case 2 and a lower case 1 made of a plastic composition. A first groove 22 and a convex portion 23 for holding the first battery terminal 6 are formed at one end of the battery housing 21 provided in the upper case 2. The first battery terminal 6 is inserted into the first groove 22 from the lower side of the upper case 2, and the vicinity of the hole 61 is elastically bent and fits in the convex portion 23. 21 is held and integrated at one end.

The first battery terminal 6 formed of a spring plate is provided with a convex portion 64 formed in a chevron shape to ensure contact with the positive electrode of the battery. Further, it extends from the lower ends at a predetermined angle of 90 degrees or less and at a predetermined width (extended portion 63), and is formed by providing a bent portion 62 at the tip thereof. First electrode 4
1 by the upper case 2, conduction between the bent portion 62 of the first battery terminal 6 and the first electrode 41 of the printed wiring board 4 is ensured.

More specifically, as shown in FIG.
The battery terminal 6 is accommodated in a first groove 22 formed at one end of the battery accommodating portion 21, fixed by a mountain-shaped convex portion 64, and furthermore, the convex portion 23 is accommodated in the hole portion 61, so that The structure prevents one battery terminal 6 from dropping out of the first groove 22.

In this state, the battery 5 is
When the upper case 2 is pressed against the printed wiring board, as shown in FIG. 4B, the extension of the spring plate material extended from both lower ends of the chevron-shaped spring plate material of the first battery terminal 6 is performed. The portion 63 and the bent portion 62 are bent by elasticity, and the two bent portions 62 come into contact with the first electrode 41 of the printed wiring board 4, and the battery 5, the first battery terminal 3, and the The first electrode 41 is electrically connected.

The bent portion 62 of the first battery terminal 6
Since the first electrode 41 of the printed wiring board 4 has a smooth curved surface, the first electrode 41 of the printed wiring board 4 is prevented from being corroded due to scratches, so that occurrence of poor conduction can be suppressed.

Next, a third embodiment will be described. FIG.
FIG. 9 is an exploded perspective view of the third embodiment. 6A and 6B are partially enlarged views of a part D in FIG. 5A, wherein FIG. 6A is a detailed perspective view of a mounting structure of a second battery terminal, and FIG. 6B is a cross-sectional view of a battery housing when a battery is mounted. is there.

In FIG. 5, the case of a small electronic device is composed of an upper case 2 and a lower case 1 made of a plastic composition. At one end of the battery accommodating portion 21 provided in the upper case 2, a coil spring-shaped second battery terminal 8 formed by forming a spring wire having a circular cross section into a conical shape is held. A bent portion 82 obtained by bending the tip of an extension portion 83 extending a predetermined length at a predetermined angle of 90 degrees or less vertically from the bottom surface by a predetermined angle contacts the second electrode 42 of the printed wiring board 4. The second battery terminal 8 and the second electrode 42 conduct.

More specifically, as shown in FIG.
The second groove 24 and the convex rib 25 hold the largest diameter portion of the coil spring, which is the conical bottom surface of the second battery terminal 8, in the battery terminal 8 described above.

In this state, when the battery 5 is mounted in the battery accommodating portion 21 and the upper case 2 is pressed against the printed circuit board 4, FIG.
As shown in (b), the extended portion 83 and the bent portion 82 of the spring plate material extending from the maximum diameter portion of the coil spring, which is the conical bottom surface of the second battery terminal 8, are bent by elasticity and folded. The curved portion 82 comes into contact with the second electrode 42 of the printed wiring board 4, and the battery 5, the second battery terminal 8, and the second electrode 42 of the printed wiring board 4 conduct.

The bent portion 82 of the second battery terminal 8
Since the second electrode 42 of the printed wiring board 42 is prevented from being corroded by a scratch due to the smooth curved surface, it is possible to suppress the occurrence of poor conduction.

Next, a fourth embodiment will be described. FIG.
FIG. 10 is an exploded perspective view of the fourth embodiment. FIG. 8 is a plan perspective view of FIG. 7D portion viewed from above.

In FIG. 7, a coil spring-shaped second battery terminal 9 is formed by forming a spring wire having a circular cross section into a conical shape at one end of a battery accommodating portion 21 provided in the upper case 2.
Is held, and the tip of the extension 93 extended from the outside of the battery housing portion of the coil spring maximum diameter portion, which is the conical bottom surface side, by a predetermined length in the vertical direction with respect to the conical bottom surface by 90 degrees or less, A bent portion 92 bent outward at a predetermined angle of 90 degrees or less with respect to the center line of the conical shape forms the second portion of the printed wiring board 4.
, And the second battery terminal 9 and the second electrode 42 conduct.

More specifically, as shown in part D of FIG.
The battery terminal 9 is formed by the second groove 24 and the projection 25.
The largest diameter portion of the coil spring shape is fitted and locked, and the extension portion 93 is formed.
Protrudes below the battery accommodating portion 21, and the tip 94 of the bent portion 92 projects outward with respect to the outer end surface 95 of the battery accommodating portion 21. By pressing the printed wiring board 4 with the upper case 2, the extension 93 of the second battery terminal 9 is located near the second electrode 42 of the printed wiring board 4.

When the upper case 2 and the lower case 1 are assembled and connected in this state, the tip 94 of the bent portion 92 of the second battery terminal 9 comes into contact with the inner wall of the lower case 1 as shown in FIG. For this reason, the extension 93 of the second battery terminal 9 elastically bends, and the bent portion 93 is securely contacted without falling out of the range of the second electrode 42 of the printed wiring board 4.

As described above, the contact between the bent portion 92 of the second battery terminal 9 and the second electrode 42 of the printed wiring board 4 is determined by positioning the bent portion 92 against the inner wall of the lower case. Therefore, even if the second battery terminal 9 is a single spring wire, the contact between the second battery terminal and the negative electrode of the printed wiring board is ensured, and the reliability of conduction is improved. I do.

[0031]

As described above, the holding structure according to the present invention can save the work time conventionally required for soldering and can reduce the manufacturing cost.

Further, since the battery terminals are held in the upper case, the battery terminals and the printed circuit board can be easily separated simply by removing the upper case from the lower case, and the electronic circuit mounted on the printed circuit board can be easily separated. In the event of a failure, the printed wiring board can be easily replaced, and re-incorporation of the battery terminal is not required, so that the work time during maintenance can be shortened and the maintenance cost can be reduced.

Further, environmental destruction has recently become a major problem, but since the battery terminals (metal), the case (plastic), and the printed wiring board are easily separated, recycling and sorting and disposal are easy.

Furthermore, since the tips of the battery terminals that are in contact with the electrodes of the printed wiring board are smoothly bent, the bent portions do not damage the electrodes of the printed wiring board when pressed by the upper case. In addition, it is possible to prevent poor conduction caused by corrosion of the electrode.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is an enlarged detailed view of a battery accommodating section in FIG. 1, and FIG.
Indicates a fitting state between the first battery terminal and the upper case,
(B) is a cross-sectional view of the battery housing when a battery is mounted.

FIG. 3 is an exploded perspective view of a second embodiment of the present invention.

FIG. 4 is an enlarged detailed view of the battery accommodating section of FIG. 3, and (a)
Indicates a fitting state between the first battery terminal and the upper case,
(B) is a cross-sectional view of the battery housing when a battery is mounted.

FIG. 5 is an exploded perspective view of a third embodiment of the present invention.

FIGS. 6A and 6B are detailed perspective views of the mounting structure of the second battery terminal of FIG. 5, wherein FIG. 6A shows the mounting structure of the second battery terminal, and FIG. It is sectional drawing of an accommodation part.

FIG. 7 is an exploded perspective view of a fourth embodiment of the present invention.

FIG. 8 is a plan perspective view of a battery accommodating portion showing a fitted state of the second battery terminal of FIG. 7 and a lower case.

FIG. 9 is a view showing a structure of a conventional battery housing device;
(A) is an exploded perspective view, (b) is a sectional view of the battery accommodating device when a battery is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower case 2 Upper case 3,6 First battery terminal 4 Printed wiring board 5 Battery 7 Case 8,9 Second battery terminal 10 Printed wiring board 11 Terminal plate 12 Coil spring 21 Battery housing 22 First Groove 23 Convex part 24 Second groove 25 Convex rib 31 Front end of substantially M-shaped central part 32, 62 Bent part of first battery terminal 33, 63 Extension part of first battery terminal 41 Print wiring The first electrode of the board 42 The second electrode of the printed wiring board 61 Holes 64 Crest-shaped protrusions 71 Grooves 72 Holes in the terminal plate 11 73 Holes in the coil spring 12 82, 92 Folding of the second battery terminals Bent portions 83, 93 Extension of second battery terminal 94 End of bent portion 92 of second battery terminal 95 Outer end surface of battery housing 111 Lead portion 121 Base end

Claims (1)

[Claims] A first case, a second case fitted with the first case, and a printed wiring board disposed inside the first and second cases; The case has a battery accommodating portion, and an electrode attaching portion for attaching an electrode connected to a battery accommodated in the battery accommodating portion. The electrode accommodating portion is provided when the electrode is arranged in the electrode attaching portion. The printed wiring board has an electrode of a substrate connected to the extension of the electrode, and the first case and the second case are integrally formed. The holding structure is characterized in that, when doing so, the extension of the electrode and the electrode of the substrate provided on the printed wiring board are pressed and connected by a surface constituting the battery housing.