JP2003123872A - Connecting structure of bus bar and circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of bus bar and circuit board which can surely and easily prevent defective connection of the bus bar and the circuit board at low cost. SOLUTION: For a connection structure of bus bar and circuit board, a conductive connection member 21 is mounted to a connection land 22 of a circuit board 20, and the circuit board 20 is inserted between respective connection parts 11, 11 of the bus bars 10. By the above, the connection lands 22 of the circuit board 20 and respective connection parts 11 of the bus bar 10 are made to firmly contact through the connection members 21, and the electrical connection of the bus bars 10 and the circuit board 20 can be surely and easily carried out at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a busbar-wiring board connection structure for electrically connecting a busbar and a wiring board.

[0002]

2. Description of the Related Art Conventionally, as a connection structure between a bus bar and a wiring board, a connection land 41 is provided at a required end portion of a wiring board 40 such as a PCB (printed circuit board) as shown in FIG. . To the connection land 41, the forked connection portion of the lead frame 42 made of a conductive material, which is formed at the upper end in the drawing, is press-fitted so as to sandwich the wiring substrate 40, and is mounted. Then, the lower end of the lead frame 42 in the drawing is inserted into the mounting hole 43a formed in the bus bar 43, and then the lead frame 42 and the bus bar 43 are soldered (or crimped or welded). As a result, the connection portion of the lead frame 42 comes into contact with the connection land 41 of the wiring board 40 with a required pressure and is electrically connected as the lead frame 42 is press-fitted.

[0003]

However, in the above-mentioned conventional connection structure of the bus bar and the wiring board, the electrical connection of the lead frame 42 to the wiring board 40 and the connection of the lead frame 42 and the bus bar 43 are performed at two locations. Need to make a connection. Therefore, there is a problem that dedicated equipment and processes are required for each connection, leading to a decrease in productivity and an increase in manufacturing cost.

It is an object of the present invention to provide a connection structure for a bus bar and a wiring board which can reliably and easily prevent an electrical connection failure between the bus bar and the wiring board at low cost.

[0005]

According to the connection structure of a bus bar and a wiring board according to claim 1 of the present invention, there is provided a connection structure of a bus bar and a wiring board for electrically connecting the bus bar and the wiring board. , The bus bar has a forked connection portion having a required flexibility integrally raised, and the wiring board is sandwiched between the connection portions, so that the connection portion is provided on at least one surface of the wiring board. The land is electrically connected to the connection portion.

According to the connection structure of the bus bar and the wiring board having the above structure, when the bus bar and the wiring board are electrically connected, the connection parts of the bus bar are connected by sandwiching the wiring board between the connection parts of the bus bar. Direct contact with the land. As a result, the bus bar and the wiring board are reliably and easily connected at one connection point (between the connection section and the connection land).

According to a second aspect of the present invention, there is provided a connection structure between a bus bar and a wiring board according to the first aspect, wherein the wiring board is connected to the connection land. A conductive connecting member is engaged and the wiring board is sandwiched between the connecting portions, so that the connecting portion of the busbar and the connecting land are electrically connected via the connecting member. Is characterized by.

According to the connection structure of the bus bar and the wiring board having the above-described structure, when the bus bar and the wiring board are electrically connected, the bus bar is connected to the connection land of the wiring board while the connection member is engaged. The wiring board is sandwiched by the respective connecting portions. Thus, the bus bar can be connected to the connection land with a required contact pressure via the connection member, and the bus bar and the wiring board can be surely and easily connected without causing a contact failure or the like.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a connection structure for a bus bar and a wiring board according to the present invention will be described below in detail with reference to FIGS. 1 to 5. 1 is a perspective view showing a first embodiment of a connection structure of a bus bar and a wiring board according to the present invention, FIG. 2 is a perspective view showing a single bus bar in FIG. 1, and FIG. 3 is a connection between a bus bar according to the present invention and a wiring board. FIG. 4 is a perspective view showing a structure of a connecting member in FIG. 3, FIG. 4 is a schematic sectional view showing an attachment structure of the connecting member in FIG. 3 to a wiring board, and FIG. Is.

A first embodiment of the connection structure between the bus bar and the wiring board of the present invention will be described. As shown in FIG. 2, the bus bar 10 of the present embodiment is formed with a pair of connecting portions 11 that are raised by bending. That is, the connecting portion 11 is integrally formed with the bus bar 10 in a bifurcated shape (tuning fork shape).
Is installed upright and has the required flexibility. Accordingly, by sandwiching the wiring board 20 between the bifurcated connecting portions 11 and 11, the bus bar 10 and the wiring board 20 can be electrically connected. Each connecting portion 11 is constantly kept in contact with the wiring board 20 by being displaced in the same direction by its own flexibility with respect to the displacement (displacement) in the thickness direction of the wiring board 20 caused by vibration or the like. Be drunk

As shown in FIG. 1, a connection land 22 is formed at a required end portion of the wiring board 20, and an electronic component 23 such as a resistor or a capacitor is soldered thereto.

Next, the operation of the first embodiment will be described. When electrically connecting the bus bar 10 and the wiring board 20, the wiring board 20 is sandwiched between the connection portions 11 of the bus bar 10 so that the connection portions 11 of the bus bar 10 directly contact the connection lands 22. . As a result, the bus bar 10 and the wiring board 20 are reliably and easily connected at one connection point (between the connection portion 11 and the connection land 22) without causing contact failure or the like. The connection land 22 is
It is also possible to form the wiring board 20 at the same position on both front and back surfaces, and electrical connection can be achieved at two positions on the front and back of the wiring board 20. Further, it is possible to increase the land thickness (copper foil thickness) by post-plating the connection land 22.
It is possible to have a life extension effect of wear due to vibration after connection.

Next, a second embodiment of the connection structure between the bus bar and the wiring board of the present invention will be described. 3, 4 and 5
As shown in (a), the bus bar 10 of the present embodiment includes
Similar to the first embodiment, a flexible bifurcated (tuning fork-shaped) connecting portion 11 is formed by a bending process. In addition, the required end portion of the wiring board 20 has a first
Connection lands 22 are formed as in the embodiment,
Electronic components 23 such as resistors and capacitors are soldered.

In the wiring board 20 of this embodiment, the conductive connecting member 21 is crimped to the connecting land 22. Therefore, the connecting member 21 includes the connecting portions 11 of the bus bar 10,
When the connecting lands 22 are electrically connected by sandwiching the connecting lands 22 between the connecting portions 11, the connecting portions 11 and the connecting lands 22 are connected by the connecting member
Electrically connected via.

The connection members 21 are attached to the connection lands 22 after mounting the electronic components 23 such as resistors and soldering, but the electronic components 23 are attached to the wiring board 20.
After mounting, the electronic component 23 may be attached and then the electronic component 23 may be soldered.

As shown in FIGS. 4 (a), 4 (b) and 5 (a), the connecting member 21 of this embodiment has a required flexibility at both ends of a flat plate-shaped base 21a. The pair of arms 21b, 21b are bent at a substantially right angle. A saw blade-shaped claw portion 21c is formed at the tip of each arm 21b of each connecting member 21. The connecting member 21 is provided on the wiring board 20 from below in FIG.
4 (a) in a state in which it is mounted so as to be sandwiched between c and 21c.
It is crimped in the direction of the middle arrow and each claw 2
1c is engaged with the connection land 22 and fixed to the wiring board 20.

In addition to the standard type shown in FIG. 5 (a), each connecting member 21 has a contact type shown in FIG. Variations as shown in d) are possible. That is, FIG.
As shown in (b), a concave portion 30b for fitting each connecting portion 11 of the bus bar 10 in the approximate center of each arm 30a.
You may use the curved type connecting member 30 which formed.

Further, as shown in FIG. 5 (c), a concave-convex shape in which a substantially circular recess 31b for fitting the tip of each connecting portion 11 of the bus bar 10 is formed substantially in the center of each arm 31a. The connecting member 31 may be used. Also, FIG.
As shown in (d), a groove portion 32b for fitting the tip end portion of each connection portion 11 of the bus bar 10 is formed substantially in the center of each arm 32a along the standing direction of the arm 32a. The connecting member 32 may be used.

The connecting members 21 are connected to the wiring board 20.
Each claw portion 21c may be soldered to the connection land 22 in a state in which the connection land 22 is crimped. This allows
The reliability of connection between each connection member 21 and the wiring board 20 can be further enhanced.

Next, the operation of the second embodiment will be described. When electrically connecting the bus bar 10 and the wiring board 20,
With the connection member 21 attached to the connection land 22 of the wiring board 20, the wiring board 20 is sandwiched between the connection portions 11 of the bus bar 10. As a result, the bus bar 10 can be firmly brought into contact with the connection land 22 via the connection member 21, and the bus bar 10 and the wiring board 20 are reliably connected without causing contact failure or the like. Note that other configurations and operations are the same as those in the first embodiment.

As described above, according to the connection structure of the bus bar and the wiring board of the first embodiment, the electrical connection points between the wiring board 20 and the bus bar 10 are defined by the respective connection portions 11 of the bus bar 10 and the wiring board 20. 1 between the connection land 22
Only the location was set. As a result, it is possible to reduce the dedicated equipment and process required for electrical connection, and the number of parts, and it is possible to reduce the manufacturing cost.

Further, according to the connection structure of the bus bar and the wiring board of the second embodiment, the connection member 2 is attached to the connection land 22.
The wiring board 20 to which 1 is attached is the connecting portion 1 of the bus bar 10.
It is sandwiched between 1 and 11. Thereby, the wiring board 20
When the connecting land 22 and the connecting portion 11 of the bus bar 10 firmly contact with each other via the connecting member 21,
0 and the connection land 22 of the wiring board 20 can be electrically connected reliably and easily.

Therefore, it is possible to reliably prevent the occurrence of contact failure due to the peeling of the copper foil of the connection land 22 due to vibration or the like, and the change in contact pressure, and the electrical connection failure between the bus bar 10 and the wiring board 20. Can be reliably prevented at low cost.

[0024]

As described above, according to the connection structure of the bus bar and the wiring board of the present invention, by sandwiching the wiring board between the connection portions of the bus bar, the connection land of the wiring board is connected to each connection portion of the bus bar. Direct contact with. Therefore, it is possible to reliably and easily prevent a defective electrical connection between the bus bar and the wiring board at low cost.

Further, according to the connection structure of the bus bar and the wiring board of the present invention, the conductive connection member is attached to the connection land of the wiring board, and the wiring board is sandwiched between the connection portions of the bus bar. The connection portions of the bus bar and the connection lands of the wiring board are in firm contact with each other via the connection member. Therefore, it is possible to reliably and easily prevent a defective electrical connection between the bus bar and the wiring board at low cost.

[Brief description of drawings]

FIG. 1 is a first connection structure of a bus bar and a wiring board according to the present invention.
It is a perspective view showing an embodiment.

FIG. 2 is a perspective view showing a connecting portion of the bus bar in FIG.

FIG. 3 is a second connection structure of a bus bar and a wiring board according to the present invention.
It is a perspective view showing an embodiment.

FIG. 4 is a schematic cross-sectional view showing a mounting structure of the connection member in FIG. 3 on a wiring board.

5 is a perspective view showing a form example of a connecting member in FIG.

FIG. 6 is a perspective view showing a conventional connection structure between a bus bar and a wiring board.

[Explanation of symbols]

10 busbars 11 Connection 20 wiring board (PCB) 21 Connection member 21a base 21b arm 21c claw 22 Connection land 23 Electronic components

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masashi Nagao             206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Yazaki             Parts Co., Ltd. (72) Inventor Masayuki Saito             2464-48 Washizu, Kosai City, Shizuoka Prefecture Yazaki Parts Co., Ltd.             In the company (72) Inventor Masayuki Sato             2464-48 Washizu, Kosai City, Shizuoka Prefecture Yazaki Parts Co., Ltd.             In the company (72) Inventor Takanori Watanabe             1500 Onjuku, Susono City, Shizuoka Prefecture Yazaki Corporation             Within F term (reference) 5E077 BB18 BB33 BB37 DD14 HH10                       JJ20                 5E317 AA04 GG16                 5E348 AA02 AA24

Claims (2)

[Claims] 1. A connection structure of a bus bar and a wiring board for electrically connecting the bus bar and the wiring board, wherein the bus bar integrally has a forked connection portion having a required flexibility. And a connection land provided on at least one surface of the wiring board is electrically connected to the connection portion by sandwiching the wiring board between the connection portions. Construction. 2. In the wiring board, a conductive connecting member is engaged with the connection land, and the wiring board is sandwiched between the connection portions to thereby connect the connection portion of the bus bar and the connection land. Is electrically connected via the connection member, The connection structure between a bus bar and a wiring board according to claim 1, wherein