JP2000285986A - Connecting structure of electric component and bus bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide connecting structure of an electric component and a bus bar capable of obtaining electrically thermally excellent connecting characteristics, enhancing material yield, and reducing manufacturing cost. SOLUTION: A pair of electrically connecting pieces 30, 31 formed by bending in an L shape and standing three tongue-shaped pieces formed by blanking a conductive plate material so that connecting ends 25a, 26a of bus bars 25, 26 for connecting plate-shaped electrodes 21a, 21b of a PTC element is complementarily arranged zigzag in the length direction of the conductive plate material. Fitting holes 28 into which the tongue-shaped pieces of the electrically connecting pieces 30, 31 are inserted by applying pressure for connection are installed in the plate-shaped electrodes 21a, 21b of the PTC element 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric component in which a pair of electrodes provided on an electric component is fitted and connected to a pair of connection ends of a bus bar made of a metal plate provided as a circuit on a wiring board or the like. And a connection structure of the bus bar.

[0002]

2. Description of the Related Art Conventionally, in a wiring board such as an electric connection box used for connection processing of an electric system of a vehicle, a bus bar made of a metal plate is disposed as a circuit on an insulating substrate, and the bus bar is required to have a bus bar. Various configurations having a connection end for connecting an electric component have been proposed according to the requirements.

Further, in such a wiring board, in order to prevent a circuit from burning, etc., an overcurrent-
A PTC element as an overheat protection element is also connected to a bus bar. However, P with such heat generation
The connection between the electrode of the TC element and the bus bar is required to secure a mutual contact area and suppress a rise in temperature at the contact.

FIGS. 10 and 11 show a conventional example of a connection structure between such a PTC element and a bus bar on a wiring board. The connection structure shown in FIG.
The pair of electrodes 1a and 1b of the PTC element 1 are fitted and connected to connection ends 10 and 10 of a pair of bus bars 6 and 6 provided on the wiring board 3, respectively. You.

[0005] Here, a pair of electrodes 1a,
1b are provided parallel to each other and spaced apart in a direction along the plate surface. On the other hand, each of the connection ends 10 of the pair of bus bars 6, 6 is provided with an electrode insertion portion 7 formed by a pair of sandwiching pieces 5, 9 erected in adjacent states by bending from different directions. In order to increase the contact area between the PTC element 1 and each of the electrodes 1a and 1b, one holding piece 5 is brought into surface contact with the electrodes 1a and 1b. Therefore,
In the connection structure described above, the electrodes 1a and 1b of the PTC element 1 are fitted into the electrode insertion portions 7 formed by the pair of holding pieces 5 and 9, respectively, so that the pair of busbars 6 and 6 are provided.
Are connected via the PTC element 1.

[0006] The connection structure shown in FIG.
No. 22323, in which the electrode 11a of the PTC element 11 has a connection end 20 formed at the end of a pair of bus bars 15, 17 disposed on the wiring board 13.
Is fitted and connected. The connection end 20 is connected to the bus bar 1
By making elastic holding pieces 16 and 18 bent in an inverted U-shape opposed to each end of the PTC elements 5 and 17, an electrode insertion section into which the electrode 11 a of the PTC element 11 is inserted is configured.

The PTC element 1 is connected to the connection end 20.
When the first electrode 11a is mounted, the elastic holding pieces 16, 1
8 presses and holds the electrode 11a in a surface contact state, and connects the bus bars 15 and 17 via the PTC element 11. The electrode 11a includes a pair of electrode portions disposed on the front and back sides of the PTC element 11 so as to be insulated from each other.

FIG. 12 shows a developed shape 6A of the bus bar 67 shown in FIG. 10, and FIG. 13 shows the bus bar 1 shown in FIG.
7 shows a developed shape 17A. In each of the developed views, the holding pieces 5 and 9 and the elastic holding pieces 18 shown in FIGS. 10 and 11 are formed by bending the portions shown by broken lines into valley folds or mountain folds. For the sake of convenience, the parts to be the holding pieces 5 and 9 and the elastic holding pieces 18 are given the same reference numerals in the respective development views.

That is, P shown in FIG. 10 and FIG.
In the connection structure between the TC element and the bus bar, the electrodes 1a, 1b
The contact between (11a) and the bus bar 6 (15, 17) is a surface contact, and the heat radiation of the contact portion is greatly improved by increasing the contact area. Can be used with confidence.

[0010]

However, in the above-described conventional connection structure, as shown in FIGS. 12 and 13, the bus bar 6 connected to the PTC element which is an electric component is used.
If (15, 17) is punched out from one raw material plate so as to prevent the developed figures from interfering with each other, there is a problem that much of the plate material to be discarded remains and the yield of the material is poor.

The holding pieces 5 and the elastic holding pieces 18 are provided with engaging portions 8 (19) which abut against the side edges of the electrodes 1a and 1b (11a) and regulate the set position of these electrodes in the width direction. Since there are many bent portions after punching, for example, provided, and there are various bending directions, the raw material of the punched bus bar cannot be bent at the same time while maintaining the positional relationship at the time of punching. As a result, the raw materials of the paired busbars that have been punched must be individually transferred to their dedicated bending processes and subjected to bending processing, and productivity decreases due to an increase in the number of processes and an increase in the required time due to movement between processes. The problem arose.

[0012] Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide an electrical component that can obtain excellent electrical and thermal connection characteristics, improve material yield, and reduce manufacturing cost. And a connection structure of the bus bar.

[0013]

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection structure between an electric component and a bus bar for connecting each electrode of the electric component to each connection end of the pair of bus bars. The end portion is provided with a pair of electric connection pieces that are formed by bending at least one tongue-shaped piece complementarily punched and formed along the longitudinal direction of the conductive plate material into an L-shape, and standing. This is achieved by a connection structure between an electric component and a bus bar, wherein each electrode of the electric component has a fitting hole into which each tongue-shaped piece of the electric connection piece is press-fitted and connected.

According to the above configuration, when a pair of bus bars connected to the respective electrodes of the electric component are punched and formed from the conductive plate material, the developed shapes of the respective connection ends are at least one of the complementary punched and formed portions. Consists of tongues of
A highly efficient boarding arrangement that hardly generates discarded plate portions can be realized. In addition, a pair of busbars formed by punching from a conductive plate material are formed by bending the tongue-shaped pieces into an L-shape and standing up while maintaining the punched positional relationship, so that electrical connection pieces are provided at each connection end. Because it can be formed, compared to the conventional electrical component and bus bar connection structure, which had to transfer a pair of bus bars individually to each dedicated bending process and perform the bending process, the number of processes was reduced and The required time can be reduced by omitting the movement between processes.

Preferably, a plurality of tongue-shaped pieces, each formed by punching out a pair of the connection ends so as to be complementarily arranged in a staggered manner along the longitudinal direction of the conductive plate material, are each bent into an L shape. A pair of formed and raised electrical connection pieces is provided. In this case, since the tongue-shaped pieces of the electric connection piece are press-fitted and connected to the corresponding fitting holes at a plurality of locations on each electrode of the electric component, the electrical contact area between each electrode and each electric connection piece Can be increased. Further, since a space is formed between the plurality of tongue-shaped pieces forming each electric connection piece, heat can be efficiently dissipated in the electric connection piece.

Preferably, a locking means is provided between the tongue-shaped piece and the fitting hole so as to position each electrode of the electric component with respect to the electric connection piece. in this case,
It is possible to reliably prevent each electrode of the electric component from accidentally falling out of the electric connection piece, and to connect the electric component and the bus bar in a stable conductive state. still,
As the locking means, a cut-and-raised piece connected to the edge of the fitting hole and a locking recess formed on the tongue-shaped piece to lock the tip of the cut-and-raised piece may be used. it can.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A connection structure between an electric component and a bus bar according to an embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing a connection structure between an electric component and a bus bar according to the first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 shows a connection state between the electric component and the bus bar shown in FIG. 4, FIG. 4 is a side view of FIG. 3, FIG. 5 is a developed view of the bus bar shown in FIG. 1, and FIG. 6 is a plan view of the bus bar shown in FIG. .

As shown in FIG. 1, the connection structure between the electric component and the bus bar according to the first embodiment is a PT as an electric component.
Plate electrodes 21a and 21b which are a pair of electrodes of C element 21
Are connected to connection ends 25a, 26a of a pair of metal plate busbars 25, 26 provided on a wiring board (not shown), respectively. The PTC element 21 is an overcurrent-overheat protection element connected between the bus bars 25 and 26 to prevent the circuit from burning and the like.
1a and 21b are configured to extend parallel to and away from the element body.

As shown in FIGS. 1 to 6, the connection ends 25a and 26a are formed by attaching three tongue-shaped pieces 30A and 31A to the respective ends of the pair of bus bars 25 and 26 in an L-shape. Electric connection pieces 30 and 31 which are bent and raised are provided. The tongue-shaped pieces 30 of the electric connection pieces 30 and 31 are used.
A and 31A are stamped and formed in a zigzag manner complementarily along the longitudinal direction of the conductive plate material forming the busbars 25 and 26, and then bent in an L-shape.

On the other hand, each plate electrode 2 of the PTC element 21
The fitting holes 28 into which the tongue-shaped pieces 30A, 31A of the electric connection pieces 30, 31 are press-fitted and connected are respectively formed in the laminations 1a, 21b at regular intervals. However, the fitting holes 28 formed in the plate electrode 21a are arranged in a staggered manner with respect to the fitting holes 28 formed in the plate electrode 21b. In the case of the present embodiment, the fitting hole 28 is a rectangular opening that matches the cross-sectional shape of the tongue-shaped pieces 30A and 31A.

In the connection structure between the PTC element 21 and the pair of bus bars 25 and 26, as shown in FIGS. 3 and 4, each of the tongue-shaped pieces 30 of the electric connection pieces 30 and 31 is used.
A and 31A are press-fitted and fitted into the respective fitting holes 28 of the corresponding plate-like electrodes 21a and 21b. As a result, the bus bar 25 and the bus bar 26 are electrically connected via the PTC element 21. It will be in the state that was done.

Each of the electric connection pieces 30 and 31 of the bus bars 25 and 26 described above is complementarily staggered along the longitudinal direction of the conductive plate, as shown in the developed shape on the conductive plate shown in FIG. Three tongue-shaped pieces 30 punched and formed so as to line up
A, 31A. And these bus bars 25, 2
6, after being punched into the developed shapes 25A and 26A, as shown in FIG.
The electrical connection pieces 30, 31 in the upright state are formed at the respective connection end portions 25a, 26a by bending the 31A into L-shape by press working.

That is, in the connection structure of the first embodiment, as shown in FIG.
a, 21b are formed by punching a pair of bus bars 25, 26 connected to the conductive plate material.
The unfolded shapes 25A and 26A of the 26a are formed by a plurality of tongue-shaped pieces 30 punched and formed so as to complementarily complement each other.
Since it is composed of A and 31A, a high-efficiency boarding arrangement that hardly generates a discarded plate portion becomes possible, and the yield of materials can be improved.

As shown in FIG. 6, the pair of busbars 25, 26 formed by punching from the conductive plate material are kept in the punched positional relationship as shown in FIG.
A is bent and formed in an L-shape, and the electric connection pieces 30 and 31 are connected to the connection ends 25a and 26a.
Therefore, the conventional electric component which had to transfer the busbars 6, (15, 17) shown in FIG. 12 and FIG. And the connection structure of the busbar,
The required time can be reduced by reducing the number of processes and omitting the movement between processes, so that productivity can be improved.

Further, in the first embodiment, each of the electric connection pieces 3 is provided at a plurality of locations on the plate electrodes 21a and 21b.
Since each of the tongue-shaped pieces 30A, 31A of 0, 31 is press-fitted and connected to the corresponding fitting hole 28, each of the plate-like electrodes 21a, 21b
And the electrical contact area between the electrical connection pieces 30 and 31 can be secured, and a rise in the temperature of the contact portion can be suppressed. Also, each tongue-shaped piece 30A, 31A forming each electric connection piece 30, 31
Since a space is formed between the electric connection pieces 30, 3,
1, heat can be efficiently dissipated. Therefore,
The reliability of the electrical connection between the PTC element 21 and the bus bars 25 and 26 can be improved.

FIG. 7 is an overall perspective view of an electric component illustrating a connection structure between an electric component and a bus bar according to a second embodiment of the present invention, and FIG. 8 is a perspective view showing a state where the electric component shown in FIG. 7 is connected to the bus bar. It is a part enlarged sectional view. The connection structure between the electric component and the bus bar according to the second embodiment is obtained by improving the electrodes of the electric component and the electric connection pieces formed on each bus bar in the first embodiment. Therefore, components having substantially the same configuration as the configuration of the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

That is, in the connection structure of the electric component and the bus bar according to the second embodiment, the electric connection pieces 30 and 31 formed at the end of each bus bar and the plate-like electrodes 32a and 32a of the PTC element 32.
Locking means for positioning the plate-like electrodes 32a, 32b of the PTC element 32 with respect to the electric connection pieces 30, 31 is provided between the fitting holes 33 of the PTC element 32. As shown in FIGS. 7 and 8, the locking means is provided with the fitting hole 28.
And a locking recess 37 formed in the electric connection piece 31 to lock the tip of the cutting and raising piece 35.

When the electric connection pieces 30, 31 of each bus bar are press-fitted and fitted into the respective fitting holes 28 of the plate electrodes 32a, 32b, as shown in FIG. The tip of the cut-and-raised piece 35 that elastically contacts the surfaces of the electric connection pieces 30 and 31 inserted through the fitting hole 28 engages with the locking recess 37. Therefore, the plate-like electrodes 32a, 32
b is securely positioned and fixed with respect to the electric connection pieces 30 and 31, thereby improving workability in assembling, and reliably preventing accidental removal from the electric connection pieces 30 and 31.
The PTC element 32 and the bus bars 25 and 26 can be connected in a stable conductive state.

The locking recesses 37 can be formed in the electric connection pieces 30 and 31 by simple press molding. For example, if they are formed simultaneously when the electric connection pieces 30 and 31 are punched, the number of processing steps is increased. In addition, there is no inconvenience such as the complexity and size of the developed graphics of the bus bars 25 and 26. In the above-described second embodiment, the locking recess 37 formed of a groove having a V-shaped cross section is used as the locking portion for locking the tip of the cut-and-raised piece 35.
It may be configured as a press-moldable projection.

FIG. 9 is an exploded perspective view showing a connection structure between an electric component and a bus bar according to a third embodiment of the present invention. At the connection end portions 45a and 46a of the pair of bus bars 45 and 46 in the third embodiment, one tongue-shaped piece formed by stamping and complementing each other is bent and formed in an L-shape, and stands up. Electric connection pieces 48 and 49 are formed. On the other hand, the pair of plate electrodes 41a, 41b of the PTC element 41 are connected to the electric connection pieces 48, 4 of the bus bars 45, 46, respectively.
9 is formed with one fitting hole 43 to be press-fitted.

That is, each plate-like electrode 41 of the PTC element 41
If a sufficient contact area can be obtained at the fitting connection portion between the a and 41b and each of the electrical connection pieces 48 and 49 while ensuring the electrical connection characteristics and preventing abnormal temperature rise, the fitting hole It is better to minimize the number of the components 43 and the electric connection pieces 48 and 49 as in the third embodiment.
a, 41b and the bus bars 45, 46 are simplified, and the manufacturing cost is easily reduced.

The electric component in the present invention is not limited to the PTC element of each of the above embodiments, but can be applied to various electric components having a structure including a pair of electrodes.
Further, the shape and number of the fitting holes and the electric connection pieces in the connection structure of the electric component and the bus bar of the present invention are not limited to the above embodiments, and the abnormal temperature rise due to the shortage of the contact area at the connection portion. Can be set appropriately based on the magnitude of the current flowing through the bus bar, the heat generation characteristics of the electric components connected to the bus bar, and the like so as not to cause the problem.

[0033]

As described above, according to the connection structure of an electric component and a bus bar according to the present invention, each connection end portion when a pair of bus bars connected to each electrode of the electric component is stamped and formed from a conductive plate material. Is composed of at least one tongue-like piece stamped and formed complementarily to each other, so that a highly efficient boarding arrangement with almost no discarded plate portion can be achieved, and the yield of material can be improved. .

The pair of busbars formed by punching from the conductive plate material are formed by bending the tongue-shaped pieces into L-shape while standing in the punched positional relationship, so that the busbars are electrically connected to the respective connection ends. Since connection pieces can be formed, a pair of busbars must be individually transferred to a dedicated bending process for each, and a bending process must be performed. Thus, the required time can be shortened by reducing the number of steps and omitting the movement between processes, and the productivity can be improved. Therefore,
It is possible to provide a connection structure between an electric component and a bus bar, which can obtain excellent electrical and thermal connection characteristics, improve material yield, and reduce manufacturing costs.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a connection structure between an electric component and a bus bar according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a front view showing a connection state between the electric components and a bus bar shown in FIG. 2;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a development view of the bus bar shown in FIG. 1;

FIG. 6 is a plan view of the bus bar shown in FIG. 5 after a tongue-shaped piece is bent.

FIG. 7 is an overall perspective view of an electric component illustrating a connection structure between an electric component and a bus bar according to a second embodiment of the present invention.

8 is an enlarged sectional view of a main part in a state where the electric component shown in FIG. 7 is connected to a bus bar.

FIG. 9 is an exploded perspective view showing a connection structure between an electric component and a bus bar according to a third embodiment of the present invention.

FIG. 10 is an exploded perspective view showing an example of a conventional connection structure between an electric component and a bus bar.

FIG. 11 is an exploded perspective view showing another example of a conventional connection structure between an electric component and a bus bar.

FIG. 12 is a development view of the bus bar shown in FIG. 10;

FIG. 13 is a development view of the bus bar shown in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 PTC element 21a Plate electrode 21b Plate electrode 25 Bus bar 26 Bus bar 25a Connection end 26a Connection end 28 Fitting hole 30 Electric connection piece 31 Electric connection piece 30A, 31A Tongue piece

Claims (3)

[Claims] 1. A connection structure between an electric component and a bus bar for connecting each electrode of the electric component to each connection end of a pair of bus bars, wherein the pair of connection ends are arranged in a longitudinal direction of the conductive plate. At least one tongue piece complementarily stamped and formed along with each other is bent to form an L-shape, and is provided with a pair of electric connection pieces, and each electrode of the electric component is provided with the electric connection piece. A connection structure between an electric component and a bus bar, wherein a fitting hole into which each tongue-shaped piece of the connection piece is press-fitted and connected is formed. 2. A plurality of tongue-shaped pieces, each of which is formed by punching out a pair of said connection end portions so as to complementarily form a staggered shape along the longitudinal direction of the conductive plate material, respectively, is bent in an L-shape. The connection structure for an electric component and a bus bar according to claim 1, further comprising a pair of electric connection pieces that stand upright. 3. A locking means for positioning each electrode of the electric component with respect to the electric connection piece is provided between the tongue-shaped piece and the fitting hole. A connection structure between the electric component according to claim 1 and a bus bar.