JP4207821B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box, and in particular, allows a fuse terminal and a relay terminal to be selectively connected to a tab protruding from a bus bar accommodated inside the electrical junction box.

  As a general structure for connecting the bus bar accommodated in the electrical junction box and the relay terminal accommodated in the relay mounting portion provided on the outer surface of the case, it is described in JP-A-8-149657 (Patent Document 1). Things are known. That is, as shown in FIG. 6, the tab erected from the bus bar 2 housed in the electrical connection box 1 is used as a relay connection male tab 2 a, and the relay connection male tab 2 a is placed in the cavity of the relay mounting portion 4. And the terminal 5a of the relay 5 accommodated in the relay mounting part 4 is connected to the upper part of the relay terminal 3, and the bus bar 2 and the relay 5 are connected via the relay terminal 3. Connected.

  However, recently, in order to reduce the number of parts and improve the connection workability, as shown in FIG. 7A, a tab erected from the bus bar 7 accommodated in the electric connection box 6 is inserted into the slot at the tip. The portion 7b is formed as a notched pressure tab 7a and protrudes into the component mounting portion 6a provided on the outer surface of the case of the electrical connection box 6, and the terminal 8a of the fuse 8 mounted on the component mounting portion 6a is connected to the bus bar 7 In some cases, the pressure contact tab 7a is directly inserted and connected to the slot 7b.

As shown in FIG. 7B, the press contact tab 7a may be connected to a relay terminal 9a instead of the fuse terminal 8a. Select and connect the relay and the fuse according to the circuit design. There is.
In this case, the relay terminal 9a is longer than the fuse terminal 8a, while the height of the pressure contact tab 7a and the depth of the slot portion 7b are set to be constant in accordance with the short fuse terminal. Therefore, when the relay terminal 9a is inserted into the pressure contact tab 7a, the front end of the relay terminal 9a hits the bottom of the slot portion 7b before the relay 9 is completely fitted, and the main body 9b of the relay 9 is incompletely fitted. In this state, there is a problem that the clearance S is formed by floating from the upper surface of the component mounting portion 6a, and the optimum contact between the pressure contact tab 7a and the relay terminal 9a cannot be ensured.
The above-mentioned problem is not only when the press-contact tab protrudes from the bus bar, but the internal circuit is an electric wire, the press-contact terminal is press-connected to the electric wire, and a fuse and a relay are selected for the press-contact tab protruding from the press contact terminal. This also occurs when connecting to a network.

JP-A-8-149657

  The present invention has been made in view of the above problems, and in the case of selectively connecting to a press-contact tab, a relay terminal, and a fuse terminal protruding from a bus bar or the like arranged in an electric connection box, the relay terminal is connected. An object is to stably mount the relay body in the state.

  In order to solve the above-mentioned problems, the present invention provides a tab that is erected from a bus bar accommodated inside an electrical junction box and / or a tab of a press-contact terminal that is press-connected to a single core wire. A notched pressure contact tab, and the protrusion height of the pressure contact tab from the insulating plate on which the electric wire or bus bar is placed are the same, inside the relay mounting part or fuse mounting part provided on the outer surface of the case of the electrical connection box A relay terminal or a fuse terminal is inserted into the slot of the pressure contact tab to be electrically connected, and the height adjustment surrounds the relay mounting portion from the outer surface of the case where the relay mounting portion is provided. Projecting an outer peripheral rib and an inner rib in the vertical and horizontal directions that connect opposite sides of the outer peripheral rib, and the horizontal inner rib is formed between the terminal insertion holes adjacent in the vertical direction The longitudinal inner rib is formed at a position laterally deviated from the terminal insertion hole, and the outer peripheral rib and Relay body so that the upper surface of any of the internal ribs abuts and the relay terminal protruding from the relay body can ensure proper contact with the pressure contact terminal without striking the slot bottom surface of the pressure contact terminal An electrical junction box is provided which is configured to hold and position the device.

  According to the electrical junction box according to the present invention, even if the shape and size of the relay are different, either the outer peripheral rib or the inner rib holds the relay, so that the relay is lifted or pressed against the upper surface of the relay mounting portion. An optimal contact state between the relay terminal and the pressure contact tab can be ensured without the relay terminal hitting the bottom surface of the tab slot. In addition, since the outer peripheral rib and the inner rib can be formed with a simple mold, an electric junction box with high versatility can be manufactured at a low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an electrical junction box 10 according to the first embodiment of the present invention. The electrical junction box 10 is formed by laminating a plurality of bus bars 16 (16A, 16B, 16C) in a lower case 11. The laminated circuit portion 15 is arranged, and the upper case opening of the lower case 11 is closed by the upper case 12. On the upper surface of the upper case 12, a relay mounting portion 13 for mounting a relay 21 as a mounting part is provided.

  The laminated circuit portion 15 has a structure in which a plurality of bus bars 16A to 16C made of conductive metal plates and a plurality of insulating plates 17 that insulate the bus bars 16A to 16C are alternately laminated. The accommodation is fixed. At the position corresponding to the relay mounting portion 13 in the laminated circuit portion 15, a plurality of press-contact tabs 18 are erected by bending upward the end portion of the bus bar 16 </ b> A disposed in the uppermost layer for connection to the relay 21. . The pressure contact tab 18 has a slot portion 18a into which a mating terminal is inserted, cut out from the tip. Further, as shown in FIG. 2, the plurality of press-contact tabs 18 have the same protruding height H1 from the surface of the insulating plate 17 on which the bus bar 16A is mounted.

  The relay mounting portion 13 of the upper case 12 is formed with a terminal insertion hole 13a for receiving the relay terminal 21a protruding from the lower surface 21b of the relay 21. On the lower surface side of the terminal insertion hole 13a, with the upper case 12 fitted to the lower case 11, a cavity 13b for inserting and accommodating the press contact tab 18 standing on the bus bar 16A, and the press contact tab 18 are secured to the lower side. The engaging step portion 13c is formed.

  The pressure contact tab 18 is inserted into the cavity 13 b of the relay mounting portion 13, and in this state, the relay terminal 21 a is inserted into the terminal insertion hole 13 a and is inserted into the slot portion 18 a of the pressure contact tab 18. And installation is done.

  As shown in FIG. 3, on the outer surface of the upper case 12 provided with the relay mounting portion 13, the lower surface of the relay 21 in a state where the relay 21 is mounted on the relay mounting portion 13 in detail, around the relay mounting portion 13. At the position corresponding to the outer peripheral edge of 21b, a square-shaped outer peripheral rib 19 is projected. In addition, internal ribs 20 a to 20 c are projected in the vertical and horizontal XY directions connecting the opposite sides of the outer peripheral rib 19. The horizontal internal ribs 20a and 20b are formed in the horizontal X direction across the adjacent terminal insertion holes 13a arranged in three rows in the vertical Y direction, and the vertical internal ribs 20c are connected to the relay mounting portion. It is formed in the vertical Y direction at a position that is further in the horizontal X direction than 13 and at a position that is a required dimension inside the outer peripheral rib 19 in the vertical Y direction.

  As shown in FIG. 2, the outer peripheral rib 19 and the inner ribs 20 a to 20 c all have the same protruding height H <b> 2 from the outer surface of the upper case 12, and this protruding height H <b> 2 is from the outer surface of the upper case 12. The protrusion height H3 of the relay mounting portion 13 is set higher. Specifically, as shown in FIG. 1, the protrusion height H2 is such that the relay terminal 21a inserted into the terminal insertion hole 13a and the press-contact tab 18 ensure optimal contact within the cavity 13b. The dimensions are set to be the same from the surface to the lower surface 21b of the relay 21.

  If it is the electrical junction box 10 of the said structure, the height adjustment of the mounting position of an attachment component will be attained. That is, even when a relay terminal 21a longer than a fuse terminal or the like is inserted into the terminal insertion hole 13a of the relay mounting portion 13 and connected to the pressure contact tab 18, the protruding amount is larger than the protruding height H3 of the relay mounting portion 13. The upper surface of the outer peripheral rib 19 and the inner ribs 20a to 20c having a large amount abuts against the lower surface 21b of the relay 21 to position and hold the relay 21, so that the tip of the relay terminal 21a does not hit the slot bottom surface 18b of the press contact tab 18 , Can ensure optimal contact.

  Further, although the size and shape of the relays mounted on the relay mounting unit 13 are not uniform, as shown in FIG. 3, not only the large-sized relay 21 but also the medium-sized relay 21 ′ and the small-sized relay 21. ”, Since the upper surface of any of the outer peripheral rib 19 and / or the inner ribs 20a to 20c is in contact with the lower surface 21b, the relay 21 or the like corresponds to relays of various shapes and sizes. And the pressure contact terminal 18 can be kept at an optimum distance suitable for the length of the relay terminal 21a.

  4 and 5 show the main part of the second embodiment of the present invention, in which the laminated circuit body 15 is configured by laminating a single core wire 31 and bus bars 16B and 16C, which are wired in parallel, and the uppermost layer. Although it differs from the first embodiment in that the single core wire 31 and the relay 21 are electrically connected via the press contact terminal 32, the other components are the same as those in the first embodiment, and therefore the same reference numerals are given. Description is omitted.

  The press contact terminal 32 is provided with a press contact tab in which an upper slot portion 32a into which the relay terminal 21a is inserted and connected is cut out from the upper end, and a lower slot portion in which the single core wire 31 is inserted and connected in the lower portion. 32b is cut out from the lower end. The inner periphery of the slot portion 32b is configured as a press contact blade 32c so that the insulation coating 31a of the single core wire 31 can be torn and contacted with the core wire 31b when pressed. Further, all the press contact terminals 32 have the same height H4.

  As described above, the upper slot portion 32a of the press contact terminal 32 that is press contact connected to the single core wire 31 is inserted into the cavity 13b of the relay mounting portion 13 of the upper case 12, and the relay inserted into the cavity 13b from the one terminal insertion hole 13a. The terminal 21a is inserted into the upper slot portion 32a, and the single core wire 31 and the relay 21 are electrically connected.

  Also in the present embodiment, the upper surface of any one of the outer peripheral rib 19 and / or the inner ribs 20a to 20c is in contact with the lower surface 21b of the relay 21 so as to be positioned and held, so that the tip of the relay terminal 21a becomes the upper slot of the press contact terminal 32. The optimal contact state between the relay terminal 21a and the press contact terminal 32 can be ensured without hitting the bottom of the portion 32a.

It is principal part sectional drawing which shows the electrical-connection box which concerns on 1st embodiment of this invention. It is sectional drawing of the state which decomposed | disassembled the electrical-connection box shown in FIG. It is a partial top view which shows the state which mounted the relay mounting part of the electrical-connection box of FIG. 1, and the relay of various shapes. It is principal part sectional drawing which shows the electrical-connection box which concerns on 2nd embodiment of this invention. It is an expansion perspective view which shows the connection structure of the press-contact terminal shown in FIG. 4, and a single core wire. It is a figure of a prior art example. It is a figure which shows another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 12 Upper case 13 Relay mounting part 13a Terminal insertion hole 16 (16A-16C) Bus bar 18 Press-contact tab 18a Slot part 19 Peripheral rib 20a, 20b Lateral inner rib 20c Longitudinal inner rib 21, 21 ', 21 " Relay 21 Relay terminal 31 Single core wire 32 Pressure contact terminal

Claims (1)

The tab standing from the bus bar housed inside the electrical junction box and / or the tab of the press contact terminal press-connected to the single core wire is a press contact tab with a terminal insertion slot cut out from the tip, and the wire or The protruding height of the pressure contact tab from the insulating plate on which the bus bar is placed is the same, and the relay terminal or the fuse terminal is protruded into the relay mounting part or the fuse mounting part provided on the outer surface of the case of the electric connection box. It is configured to be inserted into the slot of the pressure welding tab and electrically connected,
From the outer surface of the case provided with the relay mounting portion, an outer peripheral rib for height adjustment surrounding the relay mounting portion and a vertical and horizontal inner rib connecting the opposite sides of the outer peripheral rib are projected to form a horizontal inner portion. Ribs are formed between the terminal insertion holes adjacent in the vertical direction, and the vertical internal ribs are formed at positions deviated laterally from the terminal insertion holes,
Even if the size of the relay mounted on the relay mounting portion is different, the upper surface of either the outer peripheral rib and / or the internal rib contacts the lower surface of the relay main body, and the relay protrudes from the relay main body An electrical junction box configured to position and hold the relay main body so that proper contact with the press contact terminal can be ensured without causing the terminal to contact the bottom surface of the slot of the press contact terminal.

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