JP3144287B2 - Connection structure between bus bar and electronic circuit board in electrical junction box with electronic circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box with an electronic circuit for use in a wire harness for an automobile, and more particularly, to reducing the fitting force (insertion force) of a connection terminal between a bus bar and an electronic circuit board. , So that the entire outer periphery of the electronic circuit board can be used as the connection portion.

[0002]

2. Description of the Related Art Conventionally, as this type of electric junction box with an electronic circuit, as shown in FIG. 6, an electronic circuit board 3 is housed in a case 2 different from the electric junction box 1, while an electric junction box 1 is provided. A tab 4a protruding upward from the bus bar 4 housed therein,
The electric connection part 5a on the bus bar side of the connection terminal 5 housed in the housing part 1a formed on the outer surface of the electric connection box 1 is fitted from above, and the rail grooves 1b,
The circuit portion 3a of the electronic circuit board 3 is fitted from the side to the electrical connection portion 5b of the connection terminal 5 on the electronic circuit side while the rail portions 2b and 2b of the case 2 are fitted into the case 1b. Some bus bars 4 electrically connect the circuit portions 3a of the electronic circuit board 3 to each other. (Japanese Patent Laid-Open No. 58-182414
No.)

[0003]

However, in the conventional electric connection box 1 with an electronic circuit, the electric connection portion 5a on the bus bar side of the connection terminal 5 has a press-contact blade shape. Since the fitting force (insertion force) when fitting to the tab 4a is increased, the fitting workability is poor. Also, the circuit portion 3a of the electronic circuit board 3 of the case 2 is
Connection terminal 5 housed in housing portion 1a of electric connection box 1
In this configuration, the circuit portion (connecting portion) can be provided only on one side of the insertion end near the outer periphery of the electronic circuit board 3 because it is configured to be fitted from the side to the electric connection portion 5b on the electronic circuit side. There were restrictions on the configuration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and aims to reduce the fitting force (insertion force) of a connection terminal between a bus bar and an electronic circuit board and to reduce the entire outer periphery of the electronic circuit board. It is an object of the present invention to provide a connection terminal between a bus bar and an electronic circuit board in an electric connection box with an electronic circuit that can be used as a connection portion.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electronic circuit board provided in a part of an electric connection box containing a bus bar, and an electronic circuit board housed in the electronic circuit board. A circuit part and a bus bar housed in an electric connection box are electrically connected, and a connection terminal for connecting a circuit part of the electronic circuit board and a tab provided on the bus bar is provided, and the connection terminal is provided. The conductive metal plate is formed by bending processing, and the electronic circuit side electrical connection portion of the side opening to be fitted from the side to the outer peripheral circuit portion of the electronic circuit board, and the tab protruded from the bus bar. A busbar-side electric connection portion of a lower surface opening fitted from above is provided in a perpendicular direction, and a metal plate is formed on one side surface of the electronic circuit side and the busbar side electric connection portion by bending a metal plate in an annular shape, respectively. It has a tongue piece, and the connection terminal In a state where the terminal accommodating chambers are accommodated in the housing arranged side by side, the electronic circuit side electrical connection portion is fitted and attached to the circuit portion on the outer periphery of the electronic circuit board, and in this state, the bus bar side electrical connection is made to the tab of the bus bar. The circuit portion inserted into the electronic circuit-side electric connection portion is pressed and held between the peripheral surface of the spring-like tongue portion and the opposing surface, and the bus bar-side electric connection portion is fitted. The tab of the bus bar inserted into the electronic circuit board is pressed and held between the spring-like tongue portion and the opposing surface, and the circuit of the electronic circuit board is connected to the circuit board through the connection terminal at two or more sides of the electronic circuit board. The present invention provides a connection structure between a bus bar and an electronic circuit board in an electric connection box with an electronic circuit, wherein the connection between the unit and a bus bar is performed.

According to the first aspect, the electronic circuit side electrical connection portion of the connection terminal is fitted from the side to the circuit portion on the outer periphery of the electronic circuit board, and the bus bar side electrical connection portion of the connection terminal is connected to the tab of the bus bar. From above. A spring-like tongue piece is provided at the electronic circuit-side electrical connection portion and the bus bar-side electrical connection portion of the connection terminal, so that the fitting force (when engaging the circuit portion of the electronic circuit board with the tab of the bus bar, respectively) is provided. Insertion force) is reduced, so that fitting workability is improved.

Further, after the electronic connection portion of the connection terminal on the electronic circuit side is first fitted into the circuit portion on the outer periphery of the electronic circuit board from the side, the electrical connection portion on the bus bar side of the connection terminal is placed on the tab of the bus bar. Even if the electronic circuit side electrical connection part of the connection terminal is fitted to all the outer peripheral (four sides) circuit parts of the electronic circuit board, it is connected to all the corresponding tabs of the bus bar. Since the busbar-side electrical connection portions of the terminals can be smoothly fitted from above, there is no restriction on the circuit configuration.

[0008]

Further, as described above, each connection terminal is housed in the housing, and the electronic circuit-side electrical connection portion of each connection terminal is simultaneously fitted together with the housing to a circuit portion on the outer periphery of the electronic circuit board from the side. In this state,
Since the busbar-side electric connection portions of the connection terminals can be fitted together with the housing together with the tabs of the busbar from above from above, the fitting workability is further improved.

The connection terminal is formed by bending a required portion of a punched conductive metal plate, and has a horizontal notch opened on one upper side thereof and an upper end formed on an upper surface of the notch. An electronic circuit in which the above-mentioned spring-like tongue piece portion is formed by folding back from the portion into an annular shape, and a notch is fitted from the side of the electronic circuit board so that a circuit path is pressed against the peripheral surface of the above-mentioned spring-like tongue piece portion. A side electrical connection portion is provided, and a reinforcing rectangular frame portion is provided below the notch, while the spring-like tongue portion folded from the edge at the lower portion of the other side portion is opposed to the spring-like tongue portion. A contact portion protruding from one side edge of the rectangular frame portion, and a bus bar tab in the vertical direction for pressing and pressing a bus bar tab between the contact portion and the peripheral surface of the spring-like tongue piece portion. The connection part is provided.

With the above structure, when the electronic circuit board is fitted to the electronic circuit side electrical connection portion, the notch is positioned and held because the reinforcing rectangular frame is provided below the notch. Can reliably hold the pressure contact force between the conductive path and the spring-like tongue piece, and improve the electrical contact reliability.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 3 and 4, the electric connection box 10 includes a rectangular box-shaped lower case 11 and an upper case 12 made of a synthetic resin.
When the upper case 12 is put on the lower case 11, the lock claws 12b on the outer surface of the upper case 12 are engaged with the lock claws (not specifically shown) on the outer surface of the lower case 11, respectively. Is locked.

On the upper surface of the lower case 11, a bus bar 13 having a tab 13a projecting upward is set and accommodated from above. A bus bar pressing cover 18 for pressing the bus bar 13 from above onto the upper surface of the lower case 11 may be provided.

A rectangular electronic circuit board 14 is accommodated in an electronic circuit accommodating portion set at a part above the bus bar 13.

Various electronic components 15,..., 15 are mounted on the upper surface of the electronic circuit board 14, and a printed circuit (specifically, a printed circuit) for electrically connecting the electronic components 15 to the lower surface of the electronic circuit board 14. (Not shown). On the outer periphery (two sides in this example) on both sides of the upper surface of the electronic circuit board 14, circuit portions 14a, 14a continuous from the printed circuit are formed.

On the other hand, substantially harmonica-shaped synthetic resin housings 16, 16 are provided, and the connection terminals 17 are accommodated in a large number of terminal accommodating chambers 16a arranged in parallel with the respective housings 16. As shown in detail in FIGS. 2 and 3, each connection terminal 17 is formed by bending a conductive metal plate.
An electronic circuit-side electrical connection portion 17a having a side opening that is fitted and electrically connected to the side of the lower case 4a is provided, and a lower portion thereof is fitted to the tab 13a of the bus bar 13 of the lower case 11 from above so as to be electrically connected. Is provided with a busbar-side electric connection portion 17b having a lower surface opening that is connected to the power supply. Both electrical connection parts 17a, 1
7b is orthogonal.

More specifically, the electric connection portion 17a on the electronic circuit side has a horizontal notch 17h opened on one side of the upper part.
And a notch 17h as shown in FIG.
The spring-shaped tongue piece 17c is formed on the upper surface of the tongue so as to be annular from the upper end, and the notch 17h is formed as shown in FIG.
The circuit portion 14a is inserted into the electronic circuit board 14 from the side indicated by the arrow a so that the circuit portion 14a is pressed against the annular peripheral surface of the spring-like tongue piece portion 17c. A rectangular frame portion 17g for reinforcement is provided below the notch 17h, and when the electronic circuit board 14 is inserted into the notch 17h, the notch 17h is formed by the insertion pressure.
Is reinforced to prevent deformation.

Also, a spring-like tongue piece 17d, which is annularly folded back from the edge at the lower part of the other side, and a spring-like tongue piece 17d
A contact portion 17e protruding from one side edge of the square frame portion 17g is provided so as to face the contact portion 17g. Between the contact portion 17e and the peripheral surface of the spring-like tongue piece portion 17d, an arrow b in FIG. As shown, the busbar-side electric connection portion 17b is provided in the vertical direction, which is inserted into the tab of the busbar from above and pressed against it. As described above, since the spring-shaped tongue pieces 17c and 17d are formed in an annular shape, the outer surfaces thereof have great elasticity, so that when the circuit portion 14a and the tab of the bus bar are pressed against each other, they can be elastically contacted. .

Each connection terminal 1 is provided in each of the housings 16.
7 is a slit-shaped opening 16b for fitting the electronic circuit side electrical connection portion 17a of the electronic circuit board 14 to the circuit portion 14a of the electronic circuit board 14.
And a slit-shaped opening 16c for fitting the tab 13a of the bus bar 13 in the bus bar-side electric connection portion 17b. Each of the housings 16 is provided with an electronic circuit-side electrical connection portion 17a of each of the connection terminals 17 accommodated therein.
Of the electronic circuit board 14a.
Set in advance.

As shown in FIGS. 3 and 4, on the upper part of the inner surface of the upper case 12, when the upper case 12 is put on the lower case 11 and locked, the pressing shoulders which come into contact with the upper surfaces of the respective housings 16 are provided. Parts 12c, 12c are formed, and each housing 16 is pressed against the upper surface of the bus bar 13 by each shoulder 12c.

When assembling the electronic circuit board 14 to the electric connection box 10, the terminal accommodating chambers 16 a
After the connection terminals 17 are accommodated in the electronic circuit board 14, the electronic circuit side electrical connection portions 17a of the connection terminals 17 are set together with the respective housings 16 in the outer peripheral circuit portions 14a on both sides of the electronic circuit board 14 from the side. Prepare things. Next, the busbar-side electrical connection portion 17 b of the connection terminal 17 housed in each housing 16 together with the electronic circuit board 14 is connected to the lower case 11.
Each housing 16 is set on the upper surface of the bus bar 13 while being fitted from above into the tab 13a of the bus bar 13 set on the upper surface of the bus bar 13.

Thereafter, when the upper case 12 is put on the lower case 11 and the respective housings 16 are pressed against the upper surfaces of the bus bars 13 by the respective holding shoulders 12, as shown in FIG. It is automatically fixed in the lower case 11 and the upper case 12.

The connection terminals 17 of each of the housings 16 have the electronic circuit-side electrical connection portions 17a and the bus bar-side electrical connection portions 17a.
Since the spring-like tongue pieces 17c and 17d of b, the fitting force (insertion force) when fitting the circuit portion 14a of the electronic circuit board 14 and the tab 13a of the bus bar 13 is reduced, the fitting workability is improved. Be improved. Further, since a reinforcing square frame portion 17g is provided below the electronic circuit-side electric connection portion 17a, the electronic circuit board 1 is inserted into the upper notch 17h.
4, the force applied when inserting the square frame portion 17g for reinforcement,
Distributed to the housing 16 via the square frame portion 17g,
A force can be prevented from being applied to the lower end of the notch 17h. Therefore, the lower part of the notch 17h is positioned and held, and the reliability of the press-contact holding between the spring-shaped tongue piece on the upper side and the circuit part 14a of the electronic circuit board 14 can be improved.

Further, the connection terminal 17 of each housing 16
After the electronic circuit side electrical connection portion 17a is first fitted to the outer peripheral circuit portion 14a of the electronic circuit board 14 from the side, FIG.
As shown in FIG. 5A, the bus bar side electrical connection portion 17b of the connection terminal 17 can be fitted to the tab 13a of the bus bar 13 from above, so that as shown in FIG. Even when the electronic circuit-side electrical connection portions 17a of the connection terminals 17 are fitted to the circuit portions 14a on the outer periphery (four sides), all the tabs 13a of the corresponding bus bars 13 are connected to the bus bar-side electrical connection portions of the connection terminals 17. 17b can be fitted smoothly from above, so there is no restriction on the circuit configuration, and the degree of freedom in circuit design is improved.

In the above embodiment, the connection terminals 17 are housed in the housing 16 as shown in FIG. 1A, but are not housed in the housing 16 as shown in FIG. , Electronic circuit-side electrical connection portion 17 of connection terminal 17
After a is fitted from the side to the circuit portion 14a on the outer periphery of the electronic circuit board 14, the bus bar side electrical connection portion 17b of the connection terminal 17 may be fitted to the tab 13a of the bus bar 13 from above. it can.

[0026]

As is apparent from the above description, according to the first aspect of the present invention, the electronic circuit-side electric connection portion and the bus-bar side of the connection terminal to be fitted into the circuit portion of the electronic circuit board and the tab of the bus bar, respectively. Since the electrical connection portion is provided with the spring-like tongue piece, the fitting force (insertion force) is reduced, so that the fitting workability can be improved.

Further, after the electronic connection portion of the connection terminal on the electronic circuit side is first fitted to the circuit portion of the electronic circuit board from the side, the electrical connection portion of the connection terminal on the bus bar side is fitted to the tab of the bus bar from above. Therefore, even if the electronic circuit-side electrical connection portions of the connection terminals are fitted to all the outer peripheral (four sides) circuit portions of the electronic circuit board, all of the corresponding busbar tabs have the connection terminal busbar-side electrical connections. The connecting portion can be fitted smoothly from above, and there is no restriction on the circuit configuration.

Further, the electronic circuit side electrical connection portion of each connection terminal can be simultaneously fitted from the side to the outer peripheral circuit portion of the electronic circuit board together with the housing, and in this state, the bus bar of each connection terminal can be mounted. Since the side electrical connection portions can be fitted together with the housing to the tabs of the bus bar from above at the same time, the fitting workability is further improved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a connection terminal according to the present invention, in which (A) is housed in a housing and incorporated in an electric connection box, and (B) is incorporated in an electric connection box without being housed in a housing. FIG. 3 is a side sectional view of the connecting terminal.

FIG. 2A is a side view of a connection terminal, and FIG.
FIG.

FIG. 3 is an exploded sectional view of the electric junction box.

FIG. 4 is a sectional view showing an assembled state of the electric junction box.

FIG. 5A is a cross-sectional view showing a state in which a housing is fitted, and FIG. 5B is a perspective view of an electronic circuit board having circuit portions on all outer periphery.

6 (A) is an exploded perspective view of the electric connection box and the case, FIG. 6 (B) is a sectional view showing an assembled state of the electric connection box and the case, and FIG. It is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric connection box 11 Lower case 12 Upper case 13 Bus bar 13a Tab 14 Electronic circuit board 14a Circuit part 14b Outer periphery 16 Housing 17 Connection terminal 17a Electronic circuit side electric connection part 17b Bus bar side electric connection part 17c, 17d Spring tongue piece

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/10-13/14 H01R 12/00-12/38

Claims (2)

(57) [Claims] An electronic connection box is provided in a part of an electric connection box containing a bus bar.
A circuit housing is provided, and the electronic circuit housed in the electronic circuit housing is provided.
The circuit part of the road board and the busbar housed in the electrical junction box
Connect electricallyThings  A tab provided on the circuit portion of the electronic circuit board and the bus bar;
Connection terminalAnd The connection terminal is Bending and forming a conductive metal plate
And is fitted from the side to the circuit part around the outside of the electronic circuit board
From the electrical connection on the electronic circuit side of the side opening and the busbar
Busbar side of the bottom opening that fits into the protruding tab from above
Electrical connections are provided in a direction orthogonal to these electronic circuits and
A metal plate on one side of the electrical connection on the busbar side.
CircularlyWith a spring-shaped tongue piece formed by folding
AndThe connection terminals are housed in a housing with terminal housing
In the housed state, the electronic circuit
Attach and attach the side electrical connection, and in this state
Fit the busbar side electrical connection part on the tab of the subbar and install
Ke  Insert the circuit section to be inserted into the electronic
Of the tonguePeripheral surfaceAnd pressed against the opposing surface.
One of the busbars inserted into the busbar-side electrical connection section
The tab is pressed between the spring-like tongue and the opposing surface.
Let, And the connection is made around two or more sides of the electronic circuit board.
Connection between the circuit part of the electronic circuit board and the bus bar via the terminal
Go Electrical junction box with electronic circuit
Connection structure between the bus bar and the electronic circuit board. 2. The connecting terminal is formed by bending a required portion of a punched conductive metal plate, and has a horizontal notch opened at one upper portion thereof and an upper end formed on an upper surface of the notch. An electronic circuit in which the above-mentioned spring-like tongue piece portion is formed by folding back from the portion into an annular shape, and a notch is fitted from the side of the electronic circuit board so that a circuit path is pressed against the peripheral surface of the above-mentioned spring-like tongue piece portion. provided with a side electrical connections, while providing the reinforcing rectangular frame portion at the bottom of the notch, and the spring-like tongue portion folded <br/> annularly from the edge at the bottom of the other side, the spring A contact portion protruding from one side edge of the square frame portion is provided in opposition to the tongue-like tongue portion, and a tab of a bus bar is inserted between the contact portion and the peripheral surface of the spring-like tongue portion to press-fit. 2. The electrical connection box with an electronic circuit according to claim 1, further comprising: a vertical bus bar-side electrical connection portion. Connection structure between bus bar and the electronic circuit board.