JP3971622B2 - Electrical junction box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical junction box in which a current is shunted and supplied to a printed board side from a bus bar of a bus bar wiring board via terminals soldered to the printed board.
[0002]
[Prior art]
In the conventional electrical junction box, the bus bar of the bus bar wiring board disposed in a stacked manner in the junction box main body and the terminal soldered to the printed circuit board are generally connected via a relay terminal. That is, a male tab terminal bent vertically to one end of the bus bar of the bus bar wiring board, and a base portion is soldered to the printed circuit board, and the upper portion of the male mold is arranged at a position facing the tab terminal with a predetermined distance. The upper part of the male terminal of the terminal is electrically connected via a female-female relay terminal having upper and lower female contact portions.
[0003]
An electrical connection box in which each male tab terminal of a pair of bus bars is electrically connected by a female-female relay terminal is disclosed in Japanese Utility Model Laid-Open No. 1-108882 and Japanese Patent Laid-Open No. 5-83828. Etc. are disclosed.
[0004]
[Problems to be solved by the invention]
However, the conventional electric junction box has a complicated and high-cost shape in which the male tab terminal of the bus bar and the male upper portion of the terminal soldered to the printed circuit board are provided with the female contact portions up and down. Since the electrical connection is made through the female-female relay terminal, the entire electrical junction box is expensive. In addition, the male tab terminal of the bus bar and the male upper part of the terminal soldered to the printed circuit board are aligned with the contact portions of the upper and lower female molds of the relay terminal to electrically connect them. It was difficult and the assembly workability was bad. Further, since the female contact portions are provided above and below the relay terminal, the junction box body that accommodates the bus bar wiring board and the printed circuit board is thickened, and the entire size is increased accordingly.
[0005]
Therefore, the present invention has been made to solve the above-described problems, and can be easily connected by accurately positioning the tab terminal of the bus bar and the terminal for the board with the connection terminal having a simple shape. The purpose is to provide an electrical junction box.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, the bus bar wiring board in which the bus bars are arranged in order from the top in the junction box main body and the board on which the base portion of the terminal is soldered are stacked, and one end side of the bus bar is bent. In the electrical connection box that connects the tab terminal and the upper part of the board terminal via a connection terminal, the tab terminal and the board terminal have a slit-like upper part protruding to the vicinity of the tab terminal . Each of the contact terminals is formed, and the connection terminal is formed in a plate shape. At the center of the plate-like connection terminal , the tab terminal is pressed when the press contact part of the tab terminal and the press contact part of the terminal for the board are pressed. A stopper that is located between the terminal and the board terminal and that contacts the insulating portion on the surface of the bus bar wiring board is formed so as to protrude downward, and is pressed against the respective press contact portions on both sides of the connection terminal. Connect it to And characterized in that is formed.
[0009]
In this electrical connection box, a bus bar tab terminal is formed by a simple shape connection terminal having a stopper at the center and a connection portion pressed on each side of the bus bar tab terminal and each pressure contact portion of the board terminal. The terminals for the board are accurately positioned by the stopper and are easily and reliably connected.
[0010]
The invention according to claim 2 is the electrical junction box according to claim 1 , wherein a bent portion is formed on the upper side of the plate-like connection terminal.
[0011]
In this electrical connection box, the connection part on both sides of the connection terminal is securely connected to the pressure contact part of the tab terminal of the bus bar and the pressure contact part of the terminal for the board by a simple operation of pressing the bent part on the upper side of the connection terminal. Is done. Moreover, the height of the connection terminal is reduced as much as possible by bending the upper side, and the connection box body is made thinner accordingly.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0013]
1 is an exploded front view showing an electronic control unit-integrated electric junction box according to an embodiment of the present invention, FIG. 2 is a front view of a junction box main body of the electric junction box, FIG. 3 is a plan view of the junction box main body, 4 is a perspective view of the electronic control unit built in the junction box body, FIG. 5 is a cross-sectional view of the principal part of the junction box body, FIG. 6 is an enlarged sectional view of the principal part, and FIG. FIG. 8 is a perspective view showing a connection state of the connection terminals, FIG. 9 is a sectional view of the connection box body, and FIG. 10 is a use of the connection box body. It is a disassembled perspective view which shows a state.
[0014]
As shown in FIGS. 1 to 3, an electronic control unit-integrated electrical junction box 10 is made of a synthetic resin, a box-shaped upper case 11, and a synthetic resin that is fitted to the upper case 11 so as to be locked and detachable. A box-shaped main cover 12, a bus bar layer 13 disposed on the upper surface side of the main cover 12, and an upper case 11 and a main cover 12 constituting a junction box main body below the bus bar layer 13 And an electronic control unit (ECU) 20 built in between. The electrical junction box 10 is used with the upper case 11 facing upward as shown in FIG. 10 for the purpose of, for example, power distribution of automobiles. It controls on / off of a wiper or the like.
[0015]
As shown in FIGS. 1, 5, and 6, the bus bar layer 13 has a first bus bar 15A and a second bus bar 15B arranged on the upper and lower surfaces of the bus bar wiring board (insulating plate) 14, respectively. Each end thereof is vertically bent upward to form a tab terminal 15a. Each tab terminal 15a is formed with a slit-like pressure contact portion 15b, and a pair of mountain-shaped contact portions 15b, 15b is formed on the inner edge of each pressure contact portion 15a. The press contact portions 15b of the tab terminals 15a of the bus bars 15A and 15B extend to the relay mounting portion 12a, the fuse mounting portion 12b, and the like integrally formed on the upper surface side of the main cover 12 shown in FIG. A plug-in relay 16 as an electronic component is mounted on the relay mounting portion 12a, and a fuse 17 as an electronic component is mounted on the fuse mounting portion 12b.
[0016]
As shown in FIG. 1, FIG. 4, and FIG. 9, the electronic control unit 20 has a rectangular plate-like main board made of synthetic resin on which each of the crank-shaped terminals 26, the resistors 27 as electronic components, the relay 28, and the like are mounted. (Substrate) 21 and a main plate 21 made of a synthetic resin fixed to the lower surface side thereof with screws or the like (not shown) so as to face each other with a predetermined clearance through a plurality of cylindrical boss portions 31. Part of the terminal plate 30 (excluding the region portion of the frame-shaped holding plate 33) via the terminal plate 30 and a plurality of convex portions 41 such as a plurality of hook portions that fit into the plurality of concave portions 32 of the terminal plate 30 And a plate-like plate cover 40 made of a synthetic resin and disposed so as to face the upper part with a predetermined clearance therebetween, and a main base through a holding plate 33 of the terminal plate 30. A plurality of control components 51 and 52 such as a microcomputer (CPU) are mounted and connected to the main board 21 via a jumper wire 53 or a terminal (not shown). And a control board 50 having a rectangular plate shape.
[0017]
Also, as shown in FIGS. 4 to 6, a plurality of third-layer bus bars 15 </ b> C are placed at predetermined positions on the terminal plate 30. Each bus bar 15C is insulated from the second layer bus bar 15B and the like by a rib 34 integrally formed on the terminal plate 30, and the first layer bus bar 15A and the second layer bus bar 15B are arranged. After the search, when a circuit layout of the bus bar wiring board 14 is changed or added, a predetermined number of third-layer bus bars 15C are placed at predetermined positions on the terminal plate 30. .
[0018]
The joint bar (connection terminal) 25 shown in FIGS. 5 to 9 is an upper portion of the terminal 26 soldered to the press contact portion 15b of the tab terminal 15a of the first-layer bus bar 15A and the printed circuit board 21 which will be described later. The pressure contact portion 26a is electrically connected, and is supplied from the bus bar wiring board 14 to the main board 21 side by being shunted from a large current to a small current.
[0019]
As shown in FIGS. 5 to 8, the joint bar 25 is formed of a conductive metal plate in the shape of a T-shaped front surface and an L-shaped side surface. The stopper 25a is formed so as to protrude downward. As shown in FIGS. 5 and 6, the tip of the stopper 25a is connected to the tab terminal 15a and the board terminal when the pressure contact part 15b of the tab terminal 15a of the bus bar 15A and the pressure contact part 26a of the board terminal 26 are pressed. 26 and is in contact with the insulating portion 14 a on the surface of the bus bar wiring board 14. Further, a pair of connecting portions 25b and 25b are formed on both sides of the joint bar 25 so as to be in pressure contact with the respective pressing portions 15b and 26a. Further, on the upper side of the joint bar 25, a bent portion 25c is formed which is bent backward horizontally.
[0020]
As shown in FIGS. 5 to 8, the tip of each connection portion 25 b is tapered so that the pressure contact portions 15 b and 26 a can be easily pressed. Further, as shown in FIG. 5, a stopper 12 d is integrally formed at a position facing the bent portion 25 c of the joint bar 25 of the main cover 12. The stopper 12d prevents the joint bar 25 from being lifted, and each connecting portion 25b of the joint bar 25 is connected to the slit-like pressure contact portion 15b of the tab terminal 15a of the bus bar 15A and the slit-like pressure contact portion 26a of the terminal 26 for the board. The bent portion 25c of the joint bar 25 is provided so as to have a predetermined gap so as to be fully inserted into and fitted.
[0021]
As shown in FIG. 5 and FIG. 6, the terminal 26 for current supply etc., which is cranked in an L shape and has a wide width as a whole, has a slit-like pressure contact portion 26 a on the upper side, and an upper part of the inner edge of the pressure contact portion 26 a The joint bar 25, the heat generating parts such as the plug-in relay 16 and the fuse 17, and the tab terminals of the external connector 18 can be freely connected between the pair of contact portions 26b, 26b. As shown in FIG. 6, the soldering portion 26 c divided into the two portions of the base portion of the terminal 26 that connects the joint bar 25 and the like is inserted into the connection hole 22 of the main board 21 in a vertically standing state, and the main portion The main board 21 is held by being soldered to a land portion 23 formed on the lower surface of the board 21. This soldered portion is indicated by the symbol H.
[0022]
Further, as shown in FIG. 6, a flat portion 26 d is formed in the middle of the terminal 26 so as to be parallel to the main substrate 21, and the flat portion 26 d is separated from the main substrate 21 by a predetermined clearance. The terminal pressing portion 35 having an L-shaped cross section of the terminal plate 30 disposed at a position facing the terminal plate 30 is freely contactable. Terminal insertion holes 36 and 42 are formed in the vicinity of the terminal pressing portions 35 of the terminal plate 30 and the plate cover 40, respectively. Further, the pressure contact portion 26a of the terminal 26 exposed from the terminal insertion hole 42 of the plate cover 40 is in the vicinity of the tab terminal 15a of the first layer bus bar 15A, the relay mounting portion 12a, the fuse mounting portion 12b of the main cover 12, and the connector. It protrudes to the mounting portion 12c and the like.
[0023]
As shown in FIGS. 1, 4, and 9, a main board 21 and a microcomputer on which heating parts such as a resistor 27 and a relay 28 are mounted via a frame-shaped holding plate 33 integrally formed on the right side of the terminal plate 30. A control board 50 on which control components 51 and 52 such as (CPU) are mounted is held and laminated at a predetermined distance. That is, on the ceiling side of the holding plate 33, the heat shield plate 38 is integrally formed at the upper ends of the pair of side wall portions 33 a and 33 a of the holding plate 33. An air layer is formed between the heat shield plate 38 and the control board 50 via a plurality of protrusions 38 a that are integrally formed on the upper surface of the heat shield plate 38.
[0024]
Further, the control board 50 is integrally formed with a pair of side wall parts 33 a and 33 a of the holding plate 33 and the heat shield plate 38, and hook-like hook parts that are engaged with the plurality of recesses 54 of the control board 50. It is positioned via 33b. The air layer between the heat shield plate 38 and the control board 50 is always maintained at a constant value via the convex portion 38a of the heat shield plate 38.
[0025]
According to the electronic control unit-integrated electric junction box 10 of the above embodiment, as shown in FIG. 7, the slit-like pressure contact portion 15b of the tab terminal 15a of the bus bar 15A of the first layer of the bus bar wiring board 14 and the main board 21. When the slit-like pressure contact portion 26a at the upper portion of the terminal 26 soldered to the terminal 21 is electrically connected by the joint bar 25, the joint bar 25 is pressed downward by holding the bent portion 25c of the joint bar 25. 5, 6 and 8, when the tip of the stopper 25a of the joint bar 25 is pressed until it contacts the insulating portion 14a on the surface of the bus bar wiring board 14, the pair of connecting portions 25b and 25b on both sides of the joint bar 25 are Each press contact portion 15b, which is inserted into the slit-like press contact portions 15b, 26a of the tab terminal 15a of the bus bar 15A and the terminal 26 for the substrate, Each pair of contact portions 15c of the 6a, 15c and 26b, are pressed simultaneously connected to 26b.
[0026]
At this time, the tab terminal 15a of the bus bar 15A and the board terminal 26 are both positioned accurately and easily and reliably connected by the stopper 25a at the center of the joint bar 25 and the pair of connecting portions 25b and 25b on both sides. . When the main cover 12 is attached after the pressure contact, this pressure contact state is reliably maintained by the stopper 12d facing the bent portion 25c of the joint bar 25 of the main cover 12.
[0027]
As described above, the joint bar 25 having a simple shape with the stopper 25a protruding in the center accurately connects the slit-like pressure contact portion 15b of the tab terminal 15a of the bus bar 15A and the slit-like pressure contact portion 26a of the terminal 26 for the substrate. It can be positioned and securely connected. In other words, when the tip of the stopper 25a of the joint bar 25 hits the insulating portion 14a on the surface of the bus bar wiring board 14, the stopper 25a of the joint bar 25 and the pair of connecting portions 25b and 25b cause the tab terminal 15a of the bus bar 15A and the board The terminal 26 is accurately positioned so as to stand in parallel, and the pair of connection portions 25b and 25b of the joint bar 25 are connected to the tab terminal 15a of the bus bar 15A and the slit-like pressure contact portions 15b of the terminal 26 for the substrate. 26a has a sufficient depth for electrical connection and is simply and reliably inserted and connected.
[0028]
In addition, since the bent portion 25c is formed on the upper side of the joint bar 25, the connecting portions 25b on both sides of the joint bar 25 are connected to the press contact portions of the tab terminals 15a of the bus bar 15A by a simple assembling operation of pressing the bent portion 25c. 15b and the press contact portion 26a of the board terminal 26 can be easily and reliably press-connected.
[0029]
Furthermore, by bending the upper side of the joint bar 25, the height of the joint bar 25 can be made as low as possible, and the entire electrical junction box 10 can be reduced in thickness and size accordingly.
[0030]
In addition, according to the said embodiment, although the electronic control unit integrated type electric junction box which incorporated the electronic control unit was demonstrated, the electric junction box and the separate electronic control unit, the electric junction box which does not incorporate the electronic control unit, etc. Of course, the above-described embodiment can be applied.
[0032]
【The invention's effect】
As described above , according to the first aspect of the present invention, the slit-shaped press contact portion is formed on the bus bar tab terminal and the upper portion of the terminal soldered to the substrate, and the tab-shaped connection terminal is formed at the center . A stopper located between the tab terminal and the board terminal and contacting the insulating part on the surface of the bus bar wiring board protrudes downward when the pressure contact part of the terminal and the pressure contact part of the board terminal are pressed. In addition, the connection portions that are pressed against the respective press contact portions of the tab terminal and the board terminal are formed on both sides of the connection terminal. The tab terminal and the board terminal can be positioned accurately and can be easily and reliably connected.
[0033]
According to the invention of claim 2 , since the bent portion is formed on the upper side of the plate-like connection terminal, the connection portions on both sides of the plate-like connection terminal are connected to the tab terminals of the bus bar by a simple operation of pressing the bent portion. It is possible to reliably press-connect to each press-contact portion between the terminal and the board terminal. Further, by bending the upper side of the connection terminal, the height of the connection terminal can be made as low as possible, and the connection box body can be made thinner accordingly.
[Brief description of the drawings]
FIG. 1 is an exploded front view showing an electronic control unit-integrated electric junction box according to an embodiment of the present invention.
FIG. 2 is a front view of a junction box body of the electrical junction box.
FIG. 3 is a plan view of the junction box body.
FIG. 4 is a perspective view of an electronic control unit built in the junction box body.
FIG. 5 is a cross-sectional view of a main part of the junction box main body.
FIG. 6 is an enlarged cross-sectional view of a main part of the junction box main body.
FIG. 7 is a perspective view showing a state before connection of a connection terminal accommodated in the connection box body.
FIG. 8 is a perspective view showing a connection state by the connection terminal.
FIG. 9 is a sectional view of the junction box body.
FIG. 10 is an exploded perspective view showing a usage state of the junction box body.
[Explanation of symbols]
10 Electronic control unit integrated electrical junction box (electric junction box)
11 Upper case (connection box body)
12 Main cover (connection box body)
14 bus bar wiring board 15A bus bar 15a tab terminal 15b pressure contact part 21 main board (board)
25 Joint bar (connection terminal)
25a Stopper 25b Connection part 25c Bending part 26 Terminal 26a Pressure contact part (upper part)
26c Soldering part (base)

Claims (2)

The bus bar wiring board in which the bus bars are arranged in order from the top in the connection box main body and the board on which the base of the terminal is soldered are arranged to be laminated, and the tab terminal formed by bending one end side of the bus bar and the board In the electrical connection box that connects the upper part of the terminal protruding to the vicinity of the tab terminal via the connection terminal,
While forming a slit-like pressure contact portion on the top of the tab terminal and the board terminal, the connection terminal is formed in a plate shape, and the pressure contact portion of the tab terminal is formed in the center of the plate-like connection terminal. A stopper that is positioned between the tab terminal and the board terminal and is in contact with the insulating part on the surface of the bus bar wiring board is formed so as to protrude downward when being pressed with the pressure contact part of the board terminal. In addition, an electrical connection box characterized in that a connection portion that is press-contacted to each of the pressure contact portions is formed on both sides of the connection terminal. The electrical junction box according to claim 1 ,
An electric connection box, wherein a bent portion is formed on the upper side of the plate-like connection terminal.

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