JP4865024B2 - Electronic component assembly method and assembly structure - Google Patents

Description

The present invention relates to an assembling method and an assembling structure for an electronic component in which various electronic components are assembled on a wiring board and the terminals of the electronic component and a lead conductive plate are electrically and mechanically connected.

In general, there is an electronic component assembly structure in which various electronic components are assembled to a wiring board, in which the electronic component is assembled on the wiring board by screwing a screw into a nut (for example, see Patent Document 1). ).

For example, some electronic watt-hour meters have a built-in load switch, and power is supplied to and cut off from the power source by connecting and disconnecting a relay of the load switch. For example, as shown in FIGS. 11 and 12, this load switchgear incorporates an assembly structure in which various electronic components 102 including a relay 101 are assembled to a wiring board 103.

The illustrated assembly structure is incorporated in, for example, a load switching device of a single-phase three-wire watt-hour meter, and includes a power supply side terminal 104 and a load side terminal 106 disposed on one side of the wiring board 103. And two relays 101 for supplying and cutting off power between the power supply side terminal 105 and the load side terminal 107 are assembled to the wiring board 103.

  As shown in FIG. 13, the relay 101 includes a rectangular parallelepiped housing 108, and two terminals 109 and 110 are led out from the side surface of the housing 108. Each of the terminals 109 and 110 includes terminal plate portions 111 and 112 extending in parallel with the wiring substrate 103 and terminal leg portions 113 and 114 extending vertically toward the wiring substrate 103. The terminals 109 and 110 of these relays 101 are electrically connected to the power supply side and load side terminals 104 to 107 via lead-out conductive plates 115 to 118, as shown in FIGS.

  That is, one end portion of the lead conductive plates 115 to 118 is fastened and fixed to the connection end portion of the power supply side terminals 104 and 105 and the load side terminals 106 and 107 with the screw 119, and the other end of the lead conductive plates 115 to 118 is fixed. Are fixed to the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 with screws 120. The lead conductive plates 116 and 117 avoid the casing 108 of the relay 101 between the connection end portions of the power supply side terminal 105 and the load side terminal 106 and the terminal plate portion 111 of the terminals 109 and 110 of the relay 101. In order to be drawn around, it has a bent shape.

  The connection between the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 and the end portions of the lead conductive plates 115 to 118 (connection portions by screws 120) is performed in the manner shown in FIGS. . In the following, the drawing conductive plates 115 and 117 shown in the figure will be described, and the drawing conductive plates 116 and 118 are the same, so the illustration and description are omitted.

  First, as shown in FIG. 14, the relay 101 is mounted on the wiring board 103. Thereafter, as shown in FIG. 15, the lead conductive plates 115 and 117 are assembled. At this time, through holes (not shown) formed in the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 and the end portions (connection portions by the screws 120) of the lead conductive plates 115 and 117 are screw holes. Therefore, as shown in FIG. 16, the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 and the end portions of the lead conductive plates 115 and 117 are overlapped, and from the lead conductive plate side. By inserting the screw 120 and screwing it onto the nut 121 on the terminal plate part side, the ends of the lead conductive plates 115 and 117 are fastened and fixed to the terminal plate parts 111 and 112 of the terminals 109 and 110 of the relay 101. I have to.

JP 2005-93924 A

  Incidentally, as described above, the connection between the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 and the end portions (connection portions by the screws 120) of the lead conductive plates 115 to 118 is connected to the terminals 109 and 110 of the relay 101. Since the through holes formed in the end portions of the terminal plate portions 109 and 110 and the lead conductive plates 115 to 118 are not screw holes, the lead conductive plates 115 to 115 are screwed into the nuts 121. The ends of 118 are fastened and fixed to the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 (see FIGS. 14 to 16).

  In this case, after the relay 101 is mounted on the wiring board 103, it is inserted into the end portions of the lead conductive plates 115 to 118 and the through holes of the terminal plate portions 111 and 112 of the terminals 109 and 110 of the relay 101 from the lead conductive plate side. The screw 120 is screwed onto the nut 121 on the terminal plate side, but the adjacent two relays 101 and other electronic components 102 become obstructed and the nut 121 is inserted on the terminal plate side of the relay 101 There was a problem that it was very difficult to arrange (see FIGS. 11 and 12). This problem is remarkable because many electronic components 102 including the relay 101 are mounted in a limited space on the wiring board 103.

Therefore, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to provide an electronic device that can easily and reliably screw the end portion of the lead conductive plate to the terminal plate portion of the relay terminal. An object is to provide a method and a structure for assembling parts.

As technical means for achieving the above-mentioned object, the present invention provides a terminal in which a terminal plate portion extending in parallel with a wiring board and a terminal leg portion extending toward the wiring board are formed. An electronic component assembly method for mounting an electronic component on a wiring board and performing a series of assembly operations in which a lead-out conductive plate is screwed to a terminal of the electronic component, and simultaneously mounting the electronic component on the wiring substrate After the nut member is inserted into the terminal leg portion and disposed in the space between the terminal plate portion and the wiring board, the end portion of the lead conductive plate is placed with the nut member in contact with the terminal plate portion. The terminal plate portion is fastened and fixed by screwing the screw into the nut member.

The present invention also provides an electronic component having a terminal mounted on a wiring board and formed with a terminal plate portion extending in parallel with the wiring substrate and a terminal leg portion extending toward the wiring substrate. An electronic component assembly structure comprising a lead-out conductive plate screwed to a terminal of the electronic component , wherein the terminal plate is inserted into the terminal leg portion of the electronic component mounted on the wiring board. A nut member disposed in a space between the portion and the wiring board; and a lead conductive plate fastened and fixed to the terminal plate portion by screwing of the screw into the nut member .

In the electronic component assembly method and assembly structure according to the present invention, the nut member is arranged in advance in the space between the terminal plate portion of the terminal of the electronic component and the wiring board when the electronic component is mounted on the wiring board. Since there is no need to insert the nut into the terminal plate side of the terminal of the electronic component after mounting the electronic component on the wiring board as in the prior art, the end of the conductive plate for drawing is attached with a screw from the conductive plate for drawing out. It is possible to easily and securely fasten and fix the terminal plate portion of the terminal of the electronic component. At this time, since the terminal leg portion of the terminal of the electronic component is inserted through the nut member, the nut member does not come out of the space between the terminal plate portion of the terminal of the electronic component and the wiring board.

In the electronic component assembling method according to the present invention, after the nut member is disposed in the space between the terminal plate portion of the terminal of the electronic component and the wiring board, the nut member is applied to the terminal plate portion of the terminal of the electronic component. Since it is screwed in the contacted state, the terminal plate portion of the terminal of the electronic component can be supported by the nut member, and no stress is applied to the terminal plate portion of the terminal of the electronic component when screwed. , Ensuring quality is easy.

  At this time, a through hole is formed in the wiring board, a recess is formed on the wiring board side of the nut member, a pin jig is inserted into the through hole of the wiring board, and the tip of the pin jig is inserted into the nut. It is desirable that the nut member is fitted into the concave portion of the member, and the nut member is brought into contact with the terminal plate portion of the terminal of the electronic component by the pin jig. Thus, since the nut member is brought into contact with the terminal plate portion of the terminal of the electronic component by the pin jig, the terminal plate portion of the terminal of the electronic component can be reliably supported by the nut member by the pin jig. .

The electronic component assembling method according to the present invention is effective when the terminal of the electronic component includes two sets of terminal plate portions and terminal leg portions. In this case, since the two terminal plates are simultaneously supported by the two pin jigs with the nut member, it is possible to prevent the nut member from rotating when screwed, and the end of the lead-out conductive plate is connected to the electronic component. Can be easily tightened and fixed to the terminal plate portion of the terminal.

According to the present invention, the nut member is arranged in advance in the space between the terminal plate portion of the terminal of the electronic component and the wiring board when the electronic component is mounted on the wiring board. Since it is not necessary to insert and arrange the nut to the terminal plate side of the electronic component terminal after mounting on the wiring board, the end of the lead conductive plate is screwed from the lead conductive plate side to the terminal plate portion of the electronic component terminal. It is possible to easily and securely fasten and fix. As a result, the reliability of the electronic component assembly structure is improved, and the connection workability between the terminals of the electronic component and the lead conductive plate is improved in the electronic component assembly method.

1 is a perspective view showing an electronic component assembly structure in an embodiment of the present invention. It is the front view seen from the A arrow direction of FIG. It is sectional drawing which follows the II line | wire of FIG. It is a perspective view which shows the relay of FIG. (A) is the perspective view which shows the nut member of FIG. 1, (b) is the perspective view seen from the B arrow direction of (a), (c) is the perspective view seen from the C arrow direction of (a). (A) is a top view which shows the nut member of FIG. 1, (b) is a bottom view of (a). It is a front view which shows the state before attaching the relay and nut member of FIG. 2 to a wiring board. FIG. 3 is a front view showing a state before the lead-out conductive plate of FIG. 2 is assembled. It is a front view which shows the state before screwing the terminal of the relay of FIG. It is an expanded sectional view of FIG. It is a perspective view which shows the assembly | attachment structure of the conventional electronic component. It is sectional drawing which follows the II-II line | wire of FIG. It is a perspective view which shows the relay of FIG. It is a front view which shows the state before attaching the relay and nut member of FIG. 11 to a wiring board. FIG. 12 is a front view showing a state before assembling the lead-out conductive plate of FIG. 11. It is a front view which shows the state before screwing the terminal of the relay of FIG. 15, and the electrically conductive plate for extraction.

Embodiments of an electronic component assembly method and an assembly structure according to the present invention will be described in detail below. In the following embodiments, for example, when a relay of a load switching device built in an electronic watt-hour meter is assembled to a wiring board and the terminal of the relay is electrically and mechanically connected. However, the present invention is also applicable to other electronic components other than the relay of the load switching device built in the electronic watt-hour meter.

For example, in an electronic watt-hour meter, power is supplied to and cut off from a power source by connecting and disconnecting a relay of a load switching device. For example, as shown in FIGS. 1 to 3, this load switchgear incorporates an assembly structure in which various electronic components 2 including a relay 1 are assembled to a wiring board 3. The illustrated assembling structure is incorporated in, for example, a load switching device of a single-phase three-wire watt-hour meter. The power-side terminals 4 and 5 and the load-side terminals 6 and 7 disposed on one side of the wiring board 3 are used. The two relays 1 that supply and cut off the electric power are assembled to the wiring board 3.

  As shown in FIG. 4, the relay 1 includes a rectangular parallelepiped housing 8, and two copper terminals 9 and 10 are led out from the side surface of the housing 8. Each terminal 9, 10 has terminal plate portions 11, 12 extending parallel to the wiring substrate 3 and terminal leg portions 13, 14 extending perpendicularly toward the wiring substrate 3. As shown in FIGS. 1 to 3, the terminals 9 and 10 of these relays 1 are electrically connected to the power supply side terminals 4 and 5 and the load side terminals 6 and 7 through copper conductive plates 15 to 18. Is done.

  That is, one end portion of the lead conductive plates 15 to 18 is fastened and fixed to the connection end portion of the power supply side terminals 4 and 5 and the load side terminals 6 and 7 with the screw 19 and the other end of the lead conductive plates 15 to 18 is connected. Are fixed to the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 with screws 20. The lead conductive plates 16 and 17 are provided between the connection end portions of the power supply side terminal 5 and the load side terminal 6 and the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1. It has a bent shape to be routed while avoiding the above.

In this assembly structure , the nut member 21 is disposed in the space between the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the wiring board 3.

  The nut member 21 is made of resin as shown in FIGS. 5 (a) to 5 (c) and FIGS. 6 (a) and 6 (b), and has two block portions 24 in which female screw portions 22 and 23 are formed by insert nuts. , 25, two partition plate portions 26, 27 formed between the two block portions 24, 25, and one wall plate portion 28 connecting the two partition plate portions 26, 27. The block parts 24 and 25, the partition plate parts 26 and 27, and the wall board part 28 are integrally molded.

  Between the partition plate portions 26 and 27 and the block portions 24 and 25, holes 29 and 30 through which the terminal leg portions 11 and 12 of the terminals 9 and 10 of the relay 1 are inserted are provided. Further, as described above, the female screw portions 22 and 23 are formed at the inner positions of the block portions 24 and 25 on the terminal board portion side, and the pin jigs 33 and 34 (described later) are formed at the outer positions of the wiring board side. And recesses 31 and 32 into which are inserted) are formed.

  The connection between the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the end portions (connection portions by the screws 20) of the lead conductive plates 15 to 18 is performed in the manner shown in FIGS. . In the following, the drawing conductive plates 15 and 17 shown in the figure will be described, and the drawing conductive plates 16 and 18 are the same.

  First, the relay 1 is assembled to the wiring board 3 as shown in FIG. At that time, the terminal legs 13 and 14 of the terminals 9 and 10 of the relay 1 are inserted into the holes 29 and 30 of the nut member 21, and then the relay 1 is mounted on the wiring board 3. As a result, the nut member 21 is disposed in the space between the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the wiring board 3 with a gap.

  That is, as shown in FIG. 8, a gap m is formed between the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the nut member 21. By providing such a backlash due to the gap m, the molding error of the terminal plate portions 11 and 12 and the terminal leg portions 13 and 14 of the terminals 9 and 10 of the relay 1 and the assembly error of the relay 1 to the wiring board 3 are absorbed. Thus, the nut member 21 can be easily interposed in the space between the terminal board portions 11 and 12 and the wiring board 3. The gap m can be easily realized by making the thickness dimension of the block parts 24 and 25 of the nut member 21 smaller than the separation dimension between the terminal plate parts 11 and 12 and the wiring board 3.

  Thereafter, the lead conductive plates 15 and 17 are assembled as shown in FIG. The through holes (not shown) formed in the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the end portions (connection portions by the screws 20) of the lead conductive plates 15 and 17 are not screw holes. 9, with the terminal plate portions 11, 12 of the terminals 9, 10 of the relay 1 and the ends of the conductive plates 15, 17 being overlapped, the screw 20 is inserted from the conductive plate side of the drawer, as shown in FIG. 9. Then, the end portions of the lead conductive plates 15 and 17 are fastened and fixed to the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 by being screwed to the nut members 21 previously arranged on the terminal plate portion side. .

  When tightening the screw 20 to the nut member 21, as shown in FIGS. 9 and 10, the two pin jigs 33 and 34 are connected to the through holes 36 and 34 formed in the wiring board 3 from the back side of the wiring board 3. 37 is inserted into the recesses 31 and 32 of the nut member 21. By the pin jigs 33 and 34, the block portions 24 and 25 of the nut member 21 are pushed up by the gap m (see FIG. 8) and brought into contact with the terminal plate portions 11 and 12. As a result, the nut member 21 is lifted from the wiring board 3 by the pin jigs 31 and 32.

  Thus, since the nut member 21 is brought into contact with the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 by the pin jigs 31 and 32, the terminal plate is moved by the nut member 21 by the pin jigs 31 and 32. The parts 11 and 12 can be reliably supported. Thereafter, the ends of the lead conductive plates 15 to 18 are fastened and fixed to the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 by screwing the screws 20 with the nut members 21.

  As described above, after the nut member 21 is arranged in a state where the gap between the terminal board portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the wiring board 3 is given backlash due to the gap m, the nut member 21 is Since the screw 20 is pushed up by the gap m and is in contact with the terminal plate portions 11 and 12, the terminal plate portions 11 and 12 can be supported by the nut member 21. No stress is applied to the terminal plate portions 11 and 12 during the tightening by, so that the quality can be easily ensured.

  In addition, since the two pin jigs 31 and 32 are attached to the base 35, the two terminal plate parts 11 and 12 are simultaneously supported by the nut member 21 by the two pin jigs 33 and 34, respectively. Therefore, the nut member 21 can be prevented from rotating when tightening with the screw 20, and the end portions of the lead conductive plates 15 to 18 can be easily tightened and fixed to the terminal plate portions 11 and 12 of the terminals 9 and 10.

  As described above, the nut member 21 is arranged in advance in the space between the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1 and the wiring board 3 when the relay 1 is mounted on the wiring board 3. Since there is no need to insert and dispose the nut 121 on the terminal board portion side of the relay 101 after mounting the relay 101 on the wiring board 103 as in the prior art (see FIG. 16), The end portions of the conductive plates 15 to 18 can be easily and securely fastened and fixed to the terminal plate portions 11 and 12 of the terminals 9 and 10 of the relay 1.

  At this time, since the terminal leg portions 13 and 14 of the terminals 9 and 10 of the relay 1 are inserted through the holes 29 and 30 of the nut member 21, the terminal plate portions 11 and 10 of the terminals 9 and 10 of the relay 1 are provided. The nut member 21 does not come out of the space between the wiring board 3 and the wiring board 3.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

1 Electronic component (relay)
3 Wiring board 9, 10 Terminal 11, 12 Terminal board part 13, 14 Terminal leg part 15-18 Leading conductive board 20 Screw 21 Nut member 31, 32 Recess 33, 34 Pin jig 36, 37 Through hole

Claims (4)

An electronic component having a terminal formed with a terminal plate extending in parallel with the wiring board and a terminal leg extending toward the wiring board is mounted on the wiring board, and a lead conductive plate is provided. A method of assembling an electronic component for performing a series of assembly by screwing to a terminal of the electronic component , wherein the electronic component is mounted on a wiring board and at the same time a nut member is inserted into the terminal leg portion and wiring After placing the nut member in contact with the terminal plate portion, the end portion of the lead conductive plate is screwed into the terminal member by screwing the screw into the nut member. A method of assembling an electronic component, characterized by tightening and fixing. A through hole is formed in the wiring board, a recess is formed on the wiring board side of the nut member, a pin jig is inserted into the through hole of the wiring board, and a tip portion of the pin jig is inserted into the recess of the nut member. The electronic component assembling method according to claim 1, wherein the nut member is brought into contact with the terminal plate portion by the pin jig. The electronic component assembling method according to claim 2, wherein the terminal of the electronic component includes two sets of terminal plate portions and terminal leg portions. An electronic component having a terminal mounted on a wiring board and formed with a terminal plate portion extending in parallel with the wiring substrate and a terminal leg portion extending toward the wiring substrate, and a terminal of the electronic component An electronic component assembly structure comprising a lead-out conductive plate screwed to the terminal board , wherein the terminal leg portion of the electronic component mounted on the wiring board is inserted between the terminal board portion and the wiring board. A structure for assembling an electronic component , comprising: a nut member disposed in a space therebetween; and a lead-out conductive plate fastened and fixed to the terminal plate portion by screwing the nut member to the nut member .

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