JP2005203113A - Button battery terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a button battery mounting terminal having good workability such as assembly, high reliability and space saving.
A button battery mounting terminal is placed in a desired position by inserting an outer edge portion of a desired position of a printed circuit board into a U-shaped space of a printed circuit board outer edge holding portion of the button battery mounting terminal. Can be fixed removably. In this case, if a pad for grounding is arranged at the desired position on the printed circuit board or if the board contact portions 15a and 15b extending to a predetermined position where the pad for grounding is provided are provided, the button battery is mounted. The button battery mounting terminal can be connected to the ground pad simply by inserting the terminal to the desired position of the printed circuit board. As a result, the button battery mounting terminal connects the ground terminal surface of the button battery to the printed circuit board. It can be easily connected to the ground pad.
[Selection] Figure 1

Description

  The present invention relates to a button battery mounting terminal for enabling mounting of a button battery in an electronic device.

  3 to 5 are diagrams showing a conventional example of a button battery mounting terminal. In the case of FIG. 3, the button battery mounting terminal 50 is fixed by a terminal fixing screw 59 from the back side of the case 70 as shown in FIG. The button battery is mounted such that the ground electrode surface is placed horizontally on the button battery mounting terminal 50 in a state as shown in FIG. In this case, horizontal movement is limited by the case 70. In FIG. 4, a part of the button battery mounting terminal 51 is soldered to ground pads 81 a and 81 b provided on the printed circuit board 80. In FIG. 5, three portions of the button battery mounting terminal 52 are spot welded to the ground connecting metal plate 90.

  However, in the configuration shown in FIG. 3, a space for screwing must be provided, and wiring between the button battery mounting terminal and the circuit is also necessary. Not good. In the configuration as shown in FIG. 4, it is not necessary to wire the button battery mounting terminal and the circuit. However, since the heat capacity of the button battery mounting terminal is large, a soldering failure such as cold solder occurs or the button battery is mounted. Pressure is applied to the soldered portions via the battery contact portions 51a and 51b, and vibrations and the like are further applied to the soldered portions, thereby causing fatigue failure of the soldered portions. In the case of FIG. 5, the position accuracy of spot welding cannot be maintained, or the button battery mounting terminal 52 is deformed by heat at the time of spot welding, resulting in poor workability and low reliability.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a button battery mounting terminal that has good workability such as assembly, high reliability, and enables space saving. To do.

  In order to solve the above-described problems, a button battery mounting terminal according to the present invention is integrally formed from a thin metal plate member having elasticity, and is a button for enabling the button battery to be mounted on an electronic device incorporating a printed circuit board. A battery mounting terminal having a U-shaped cross section formed by a vertical plane connecting one outer edge of the first and second parallel horizontal planes and one of the first and second horizontal planes, and an outer edge portion of the printed circuit board A printed circuit board outer edge holding part for holding the outer edge part of the printed circuit board by elastically pressing the surface at the outer edge part of the printed circuit board in the thickness direction, and the center of the first horizontal plane of the printed circuit board outer edge holding part. Gradually move away from the adjacent outer edge away from the vertical plane of the printed circuit board outer edge holding section and from the virtual horizontal plane on the extension of the first and second horizontal planes of the printed circuit board outer edge holding section. And a battery contact that extends out the earthenware pots.

  According to such a configuration, the terminal for attaching the button battery can be detachably fixed at the desired position by inserting the outer edge portion at the desired position of the printed circuit board into the U-shaped space of the outer edge holding part of the printed circuit board. . In this case, if a ground pad is disposed at the desired position on the printed circuit board, the button battery mounting terminal can be connected to the ground pad simply by inserting the button battery mounting terminal into the position. In other words, the button battery mounting terminal makes it easy to connect the ground terminal surface of the button battery to the ground pad of the printed circuit board.

  In the present invention, the first and second substrate contact portions are separated from the vertical surface of the printed circuit board outer edge holding portion from both ends of the first horizontal surface of the printed circuit board outer edge holding portion as an extension of the first horizontal surface. The tip portions of the battery contact portions are connected to each other by a connecting portion extending in the horizontal direction, and an upward projection is provided at the tip portion of the battery contact portion, and the tip portions of the first and second substrate contact portions are provided. Is preferably provided with a downward projection. In this case, the ground pad of the printed circuit board is disposed at a position corresponding to the protrusion of the first and second substrate contact portions.

  As described above in detail, according to the present invention, if a ground pad is disposed at the desired position of the printed circuit board, the button battery mounting terminal can be simply inserted into the button battery mounting terminal. Can be connected to the ground pad, and the button battery mounting terminal can easily connect the ground terminal surface of the button battery to the ground pad. As a result, it is possible to provide a button battery mounting terminal that has good workability such as assembly, is highly reliable, and enables space saving.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is an external view showing an embodiment of a button battery mounting terminal of the present invention, FIG. 2A is a plan view of the button battery mounting terminal of FIG. 1, and FIG. 2B is a plan view of FIG. It is sectional drawing seen from the line PP. The button battery mounting terminal 10 shown in FIG. 1 is integrally formed from a thin metal plate material having elasticity as used in a leaf spring. The printed circuit board holding unit 11 includes two horizontal planes and a vertical plane that connects one outer edge of the horizontal planes, and has a U-shaped cross section. The button battery mounting terminal 10 is attached to the printed board 20 by inserting the outer edge portion of the printed board 20 into the printed board outer edge holding portion 11 having a U-shaped cross section. In this case, the interval for inserting the printed board outer edge holding portion 11 is about the same as the thickness of the printed board 20. Therefore, the printed board outer edge holding portion 11 holds the outer edge portion of the printed board 20 with an elastic force.

  Battery contact portions 12 a and 12 b extend from the central portion of one of the two parallel horizontal surfaces constituting the printed circuit board outer edge holding portion 11. The battery contact portions 12a and 12b extend along a virtual plane perpendicular to the vertical surface of the printed circuit board outer edge holding portion 11 so as to leave the vertical surface and gradually away from the two horizontal surfaces. Yes. The tip of the battery contact portion 12a, 12b has an upward projection 13a, 13b (for button battery contact; if the tip of the battery contact portion 12a, 12b is smooth, the projection 13a, 13b in FIG. Can be omitted). Further, from both ends of the printed board outer edge holding part 11 where the battery contact parts 12 a and 12 b extend, the board contact parts 15 a and 15 b extend as the horizontal plane of the printed board outer edge holding part 11. The two ends extend at right angles to the vertical plane of the two, and are connected by a connecting portion 15c.

  Projecting portions 16a and 16b facing downward in FIG. 2A are provided at the tip portions of the substrate contact portions 15a and 15b. The protrusions 16a and 16b are positioned so as to come into contact with pads 21a and 21b (for example, a ground pattern) provided on the printed circuit board 20 when the button battery mounting terminal 10 is mounted on the printed circuit board 20. ing. Hooks 14a and 14b (see FIG. 1) bent downward in FIG. 2A are formed at two locations on the outer edge of the connecting portion 15c. The hooks 14 a and 14 b engage with the positioning holes 22 a and 22 b of the printed circuit board 20 when the button battery mounting terminal 10 is mounted on the printed circuit board 20.

  When the button battery mounting terminal 10 configured in this way is mounted on the printed circuit board 20 of an electronic device (for example, a portable barcode reader) and the button battery 30 is mounted, the button battery 30 becomes a case of the electronic device or the like. Positioning is performed as shown in FIG. 2B by a positioning member (not shown) constituted by That is, the movement of the button battery 30 is restricted by the positioning member in the horizontal direction and is movable in the vertical direction, so that it is pressed downward at the time of mounting. Therefore, the protrusions 13a and 13b of the battery contact portions 12a and 12b are in contact with the ground surface of the button battery 30 and receive the pressing force F1. This pressing force F1 is transmitted to the protrusions 16a and 16b via the printed board outer edge holding part 11 and the board contact parts 15a and 15b. The protrusions 16a and 16b press the pads 21a and 21b by the pressing force F2 including the force transmitted in this way and the elastic force of the substrate contact portions 15a and 15b, and stable electrical connection is performed.

  In the above example, if the strength of the substrate contact portions 15a and 15b is sufficient, the connecting portion 15c may be omitted, and two battery contact portions are provided, but the number is not limited to this. . In addition, if the button battery mounting terminal 10 and the printed circuit board outer edge holding part 11 are coupled with the printed circuit board with a strong force, the button battery mounting terminal 10 is composed of only the printed circuit board outer edge holding part and the battery contact part. It is also preferable to do. In this case, if connection with the ground pad on the printed circuit board is necessary, the ground pad is arranged on the printed circuit board corresponding to the insertion position of the printed circuit board outer edge holding portion, and the inserted printed circuit board outer edge is inserted. It is preferable to connect to the ground pad of the printed circuit board through the holding portion. In the above example, the button battery is connected to the positive electrode by a conventional method on the side surface or upper surface of the button battery.

It is an external view which shows embodiment of the button battery mounting terminal of this invention. (A) is a top view of the button battery mounting terminal of FIG. (B) is sectional drawing seen from the line PP of (A). (A) is an external view which shows the 1st prior art example of a button battery mounting terminal. (B) is an external view which shows the back surface of (A). It is an external view which shows the 2nd prior art example of the button battery mounting terminal. It is an external view which shows the 3rd prior art example of the button battery mounting terminal.

Explanation of symbols

10 Button battery mounting terminal, 11 Printed board outer edge holding part, 12a, 12b Battery contact part, 13a, 13b, 16a, 16b Protrusion part, 14a, 14b Hook, 15a, 15b Board contact part, 20 Printed board, 21a, 21b Pad, 22a, 22b Positioning hole, 30 button battery.

Claims (2)

A button battery mounting terminal that is integrally formed from a thin metal plate member having elasticity, and that allows a button battery to be mounted on an electronic device incorporating a printed circuit board,
When the first and second parallel horizontal planes and a vertical plane connecting one outer edge of each of the first and second horizontal planes form a U-shaped cross section and are mounted on the outer edge portion of the printed circuit board, the printed circuit board A printed circuit board outer edge holding part that holds the outer edge part of the printed circuit board by pressing the surface of the outer edge part of the printed circuit board with an elastic force in the thickness direction;
A hypothesis on the extension of the first and second horizontal planes of the printed circuit board outer edge holding part from the outer edge near the center of the first horizontal plane of the printed circuit board outer edge holding part and away from the vertical plane of the printed circuit board outer edge holding part A button battery mounting terminal having a battery contact portion extending gradually away from a horizontal plane.   From both ends of the first horizontal plane of the printed circuit board outer edge holding section, the first and second board contact sections extend away from the vertical plane of the printed circuit board outer edge holding section as extensions of the first horizontal plane, The tip portions are connected by a connecting portion extending in the horizontal direction, the tip portion of the battery contact portion is provided with an upward projection, and the tip portion of the first and second substrate contact portions is provided with a downward projection. The button battery mounting terminal according to claim 1, further comprising a portion.

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