JP2013021757A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box which surely prevents components from dropping from a component attachment part.SOLUTION: An electric connection box 1 includes: a bus bar 6; multiple components electrically connecting with the bus bar 6; and a holding member 2 made of a synthetic resin and provided with multiple component attachment parts 10, 21, 22. In the component attachment part 10 to which a terminal fitting 7 connecting with a terminal of an electric wire 8 is attached, a cylindrical enclosure wall 11 enclosing the terminal fitting 7 and a locking arm 12 extending from an inner surface of the enclosure wall 11 and locking the terminal fitting 7 are provided. Slits 14, which the bus bar 6 is inserted when attached to the holding member 2, are provided on a pair of facing walls 11c, 11d of the enclosure wall 11. Further, a spreading prevention member 5, preventing the space of each slit 14 from spreading, is attached to an outer peripheral surface of the enclosure wall 11.

Description

  The present invention relates to an electrical junction box mounted on an automobile.

  A variety of electronic devices are mounted on automobiles. In order to supply power and transmit signals to these various electronic devices, electrical junction boxes are arranged at appropriate locations in the automobile. In the present invention, a junction block (also referred to as a junction box), a fuse block (also referred to as a fuse box), and a relay block (also referred to as a relay box) are collectively referred to as an electrical connection box.

  The electrical connection box has various structures depending on the vehicle type. For example, as disclosed in Patent Document 1, a bus bar, a plurality of components electrically connected to the bus bar, and the bus bar are used. And a synthetic resin holding member to which a plurality of components are attached.

JP 2009-171791 A

  FIG. 9 is an electrical junction box invented by the inventors of the present application. Reference numeral 6 in the figure denotes the bus bar, and reference numeral 2 denotes the holding member. The holding member 2 is provided with a bus bar mounting portion 23 to which the bus bar 6 is mounted, a plurality of component mounting portions 21 and 22 to which fuses and the like are mounted, a component mounting portion 10 to which a terminal fitting connected to the end of the electric wire is mounted, and the like. It has been.

  The component mounting portion 10 is provided with a cylindrical surrounding wall 11 that surrounds the terminal fitting, and a locking arm 12 that extends from the inner surface of the surrounding wall 11 and engages the terminal fitting. . In addition, a pair of walls 11 c and 11 d facing the surrounding wall 11 is provided with a slit 14 through which the bus bar 6 is attached to the bus bar attaching portion 23. Further, the terminal fitting is electrically connected to the bus bar 6 by being attached to the component attaching portion 10.

  However, in the above-described component mounting portion 10, when an external force is applied to the surrounding wall 11, the gap between the slits 14 is widened, and the locking of the locking arm 12 to the terminal fitting may be released. Discovered. This is because the opening dimension of the surrounding wall 11 of the component mounting portion 10 is larger than the opening dimensions of the other component mounting portions 21 and 22, and the slits 14 are formed in the pair of walls 11 c and 11 d facing the surrounding wall 11. It is thought that this is a factor.

  Therefore, an object of the present invention is to provide an electrical junction box that can reliably prevent a component from dropping off from a component mounting portion.

  In order to achieve the above object, the invention described in claim 1 includes a bus bar, a plurality of components electrically connected to the bus bar, a bus bar mounting portion to which the bus bar is mounted, and a plurality of components to which the plurality of components are mounted. In an electrical junction box comprising a synthetic resin holding member provided with a component mounting portion, at least one of the plurality of component mounting portions includes a cylindrical surrounding wall that surrounds the component, A locking arm that extends from the inner surface of the surrounding wall and locks the component, and is passed through a pair of opposing walls of the surrounding wall when the bus bar is attached to the holding member. The electrical connection box is characterized in that a slit is provided, and an opening preventing member that is formed in a frame shape and prevents an increase in the interval between the slits is attached to the outer peripheral surface of the surrounding wall.

  According to a second aspect of the present invention, in the first aspect of the present invention, the terminal fitting connected to the end of the electric wire, which is one of the parts, has the part mounting portion to which the opening prevention member is attached. It is characterized by being attached to.

  According to the first aspect of the present invention, at least one of the plurality of component mounting portions includes a cylindrical surrounding wall that surrounds the component, and extends from an inner surface of the surrounding wall. A locking arm that locks to the component, a pair of opposing walls of the surrounding wall is provided with a slit that is passed when the bus bar is attached to the holding member, and the surrounding wall Since the opening prevention member that prevents the gap between the slits from being widened is attached to the outer peripheral surface, the gap between the slits does not increase even when an external force is applied to the surrounding wall. The lock on the arm parts is not released. Therefore, it is possible to provide an electrical connection box that can reliably prevent the component from dropping off from the component mounting portion.

  According to the invention described in claim 2, since the terminal fitting connected to the end of the electric wire which is one of the parts is attached to the part attaching portion to which the opening preventing member is attached, It is possible to provide an electrical junction box that can reliably prevent the terminal fitting from falling off the mounting portion.

It is a perspective view which shows the electrical junction box concerning one Embodiment of this invention. It is sectional drawing along the AA line in FIG. FIG. 2 is a plan view of the electric junction box shown in FIG. 1. It is a perspective view which shows the state before attaching the terminal metal fitting shown by FIG. 2 to a component attachment part. It is sectional drawing along the BB line in FIG. It is the perspective view which expanded the principal part of the electrical-connection box shown by FIG. It is a perspective view of the opening prevention member shown by FIG. FIG. 7 is a perspective view of the bus bar shown in FIG. 6. It is a perspective view which shows the state before attaching the opening prevention member shown by FIG. 6 to an enclosure wall.

  An “electric connection box” according to an embodiment of the present invention will be described with reference to FIGS. The electrical junction box 1 of the present invention is mounted on an automobile and supplies power and transmits signals to an electronic device mounted on the automobile.

  As shown in FIGS. 1 to 3, the electrical junction box 1 includes a case 4 made of synthetic resin, a lower cover (not shown) attached to the lower surface 4 a side of the case 4, and an upper attached to the upper surface 4 b side of the case 4. A cover (not shown), a bus bar 6, and a plurality of parts electrically connected to the bus bar 6 are provided.

  The “lower surface 4a of the case 4” is a surface located on the lower side when the electrical junction box 1 is used, and the “upper surface 4b of the case 4” is located on the upper side when the electrical junction box 1 is used. It is the surface to do.

  In the case 4, an outer wall 3 formed in a rectangular frame shape and a holding member 2 provided inside the outer wall 3 are integrally provided. The holding member 2 includes a bus bar attachment portion 23 to which the bus bar 6 is attached, a plurality of component attachment portions 21 and 22 to which fuses and the like are attached, a component attachment portion 10 to which the terminal fitting 7 connected to the terminal of the electric wire 8 is attached. Is provided. The component mounting portions 21 and 22 are provided on the upper surface 4 b side of the case 4, and the component mounting portion 10 is provided on the lower surface 4 a side of the case 4.

  Further, the “holding member 2” of the present invention is not necessarily integral with the outer wall 3, and may be a separate body. That is, the “holding member 2” may be configured to be detachable from the outer wall 3.

  The bus bar 6 is a wiring member obtained by pressing a metal plate or the like. As shown in FIG. 8, the bus bar 6 has a plate-like base portion 64, a plurality of connection portions 61 and 62 that protrude from the edge of the base portion 64 and are electrically connected to a fuse, and the like, and protrude from the edge of the base portion 64. A plate-shaped terminal fitting connecting portion 60 that is electrically connected to the fitting 7 is provided. The terminal fitting connecting portion 60 is provided between a plurality of connecting portions 61 arranged in a horizontal row and a plurality of connecting portions 62 arranged in a horizontal row, and the plurality of connecting portions 61, 62 It protrudes in the opposite direction. The base 64 is bent in a U shape so that the plurality of connection portions 61 and the plurality of connection portions 62 face each other. Further, the base portion 64 is provided with a plurality of locking holes 63 for locking the bus bar locking arm 13 (see FIG. 2) provided in the bus bar mounting portion 23.

  In such a bus bar 6, when the base 64 is positioned in the bus bar mounting portion 23 and the bus bar locking arm 13 is locked in the locking hole 63, the terminal fitting connecting portion 60 is positioned in the component mounting portion 10, and the connecting portion 61. Is positioned on the component mounting portion 21, and the connecting portion 62 is positioned on the component mounting portion 22.

  The terminal fitting 7 is for electrically connecting the electric wire 8 and the bus bar 6. As shown in FIGS. 2 and 4, the terminal fitting 7 includes a pair of covering caulking pieces 71 for caulking the insulation coating of the electric wires 8, a pair of core wire caulking pieces 72 for caulking the core wires of the electric wires 8, and the terminal fittings of the bus bar 6. A cylindrical portion 73 that can receive the connecting portion 60, and a spring piece 74 that is provided inside the cylindrical portion 73 and biases the terminal fitting connecting portion 60 toward the inner surface side of the cylindrical portion 73. The cylinder portion 73 is provided with a locking hole 75 for locking the locking arm 12 provided in the component mounting portion 10. Further, in the present invention, the terminal 8 with the terminal fitting 7 connected to the end of the electric wire 8 is referred to as a “wire with terminal fitting” and is denoted by reference numeral 9.

  The component mounting portion 10 to which the terminal fitting 7 of the electric wire 9 with terminal fitting is attached includes a cylindrical surrounding wall 11 surrounding the terminal fitting 7 and an inner surface of the surrounding wall 11 to lock the terminal fitting 7. The locking arm 12 that locks into the hole 75 and the opening prevention member 5 attached to the outer peripheral surface of the surrounding wall 11 are configured.

  As shown in FIG. 9, the surrounding wall 11 is formed in a square cylinder shape by four walls 11a, 11b, 11c, and 11d. The locking arm 12 extends from the inner surface of the wall 11b. In addition, a pair of walls 11 c and 11 d facing the surrounding wall 11 is provided with a slit 14 through which the bus bar 6 is attached to the bus bar attaching portion 23.

  As shown in FIG. 7, the opening preventing member 5 is formed separately from the surrounding wall 11 and is formed in a square frame shape from a synthetic resin. The opening prevention member 5 is attached to the outer peripheral surface of the surrounding wall 11 by press-fitting and prevents the interval between the slits 14 from expanding. That is, the opening prevention member 5 prevents the surrounding wall 11 from being deformed by an external force.

  Further, the part mounting portion 10 has a slit 14 in a pair of walls 11c and 11d opposed to the surrounding wall 11 because the opening dimension of the surrounding wall 11 is larger than that of the other part mounting portions 21 and 22. Therefore, the amount of deformation when an external force is applied is larger than that of the other component mounting portions 21 and 22. Therefore, if the opening preventing member 5 is not attached to the surrounding wall 11, the locking arm 12 may be unlocked from the terminal fitting 7. Therefore, in the electrical connection box 1 of the present embodiment, the component mounting portion 10 is not provided. The opening prevention member 5 is attached only to the surrounding wall 11. However, in the present invention, not only the component mounting portion 10 to which the terminal fitting 7 is mounted, but also a component mounting portion in which the component may be dropped, the opening preventing member 5 is appropriately mounted on these component mounting portions. Good.

  As described above, according to the present invention, since the opening preventing member 5 is attached to the outer peripheral surface of the surrounding wall 11 of the component mounting portion 10, the interval between the slits 14 is widened even when an external force is applied to the surrounding wall 11. The locking arm 12 is not unlocked from the terminal fitting 7. Therefore, it is possible to provide the electrical junction box 1 that can reliably prevent the terminal fitting 7 from dropping from the component mounting portion 10.

  Next, a method for assembling the electrical junction box 1 will be described. First, as shown in FIG. 9, with the opening preventing member 5 removed from the surrounding wall 11, the bus bar 6 is attached to the bus bar attaching portion 23 through the slit 14 from the lower surface 4 a side. Next, as shown in FIG. 6, the opening prevention member 5 is attached to the outer peripheral surface of the surrounding wall 11 by press fitting. 4 and 5, the terminal fitting electric wire 9 is inserted into the surrounding wall 11 from the lower surface 4a side to attach the terminal fitting 7 to the component attaching portion 10 and also to the terminal fitting connecting portion 60 of the bus bar 6. Electrical connection to And components, such as a fuse, are attached to the component attachment parts 21 and 22 from the upper surface 4b side, and are electrically connected to the connection parts 61 and 62 of the bus bar 6. In addition, you may perform attachment work of components, such as a fuse, before attachment work of the electric wire 9 with a terminal metal fitting. Finally, the electric connection box 1 is completed by attaching the lower cover and the upper cover to the case 4.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Holding member 5 Opening prevention member 6 Bus bar 7 Terminal metal fitting 8 Electric wire 10, 21, 22 Component attachment part 11 Enclosure wall 12 Locking arm 14 Slit 23 Bus bar attachment part

Claims (2)

A bus bar, a plurality of components electrically connected to the bus bar, a bus bar mounting portion to which the bus bar is mounted, and a synthetic resin holding member provided with a plurality of component mounting portions to which the plurality of components are mounted. In the electrical junction box
At least one of the plurality of component mounting portions is provided with a cylindrical surrounding wall that surrounds the component, and a locking arm that extends from the inner surface of the surrounding wall and locks to the component. A pair of opposing walls of the surrounding wall is provided with a slit that passes when the bus bar is attached to the holding member, and is formed in a frame shape on the outer peripheral surface of the surrounding wall. An electrical junction box, characterized in that an opening preventing member for preventing the gap from expanding is attached. The electrical junction box according to claim 1, wherein a terminal fitting connected to an end of an electric wire which is one of the components is attached to the component attaching portion to which the opening preventing member is attached.

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