JP5090771B2 - Electrical junction box mounting structure - Google Patents

Description

  The present invention relates to an electric junction box mounting structure in which a case of an electric junction box is pushed and locked to an attachment side such as a vehicle body or a resin unit.

  5 (a) and 5 (b) show one form of a conventional electric junction box (see Patent Document 1).

  The electrical connection box 61 includes a main cover 62 formed of a synthetic resin with a relatively narrow width, and a circuit board assembly that is vertically installed in the main cover through an opening 63 at the top of the main cover 62. 64 and an upper cover (sub cover) 65 made of synthetic resin that closes the opening 63 of the main cover 62.

  At the upper and lower ends of the circuit board 66, a plurality of rows of terminals 68 and 69 projecting up and down, and insulating resin block bodies 70 and 71 for aligning and fixing the terminals 68 and 69 are disposed. A plurality of relays (electrical parts) 67 are disposed in the middle portion of the substrate 66.

  The upper wall of the upper cover 65 and the bottom wall 72 of the main cover 62 are provided with mounting portions 73 and holes 74 for projecting the terminals 68 and 69, and the terminals 68 and 69 and the block main bodies 70 and 71. Thus, connector blocks 75 and 76 are formed. Each fuse (not shown) is attached to the attachment portion 73 and connected to the terminal 68 of the connector block 75.

  As an electrical connection box other than the above, Patent Document 2 uses a main cover that is narrower (thin) and deeper than that in FIG. 5, and a bus bar circuit, an insulating plate, and a fuse are inserted into the cover from the upper and lower openings of the main cover. An electrical connection box (not shown) is described in which a connection terminal is inserted and the upper opening of the main cover is closed with a fuse mounting portion (sub cover) made of insulating resin.

On both narrow side walls of the case of the electrical junction box, there are provided slide-engagement-type lock portions for a locked portion including a locking portion on the mounting side of the vehicle body or the like and a vertical guide portion.
JP 2003-348732 A (FIGS. 1-2) JP 2004-328842 A (FIGS. 1 to 3)

  However, in each of the above conventional electrical junction boxes, for example, when the lock portions similar to the electrical junction box of Patent Document 2 are provided on both side walls of the case 62 of the electrical junction box 61 of FIG. 5 (Patent Document 1). When the operator presses both sides in the longitudinal direction (left and right) of the upper wall of the upper cover 65 downward with both hands and engages each lock part with each locked part on the mounting side of the vehicle body, etc., a large push In addition to requiring a force, there is a concern that the electric connection box 61 tends to tilt in the direction in which it is strongly pressed (either left or right), and the lock portion may be incompletely engaged with the locked portion.

  In addition, when the upper end of the circuit board 66 is disposed close to the upper cover 65 or when the upper end of the circuit board 66 is supported on the inner surface side of the upper cover 65, the longitudinal intermediate portion of the upper wall of the upper cover 65 is provided. There is a concern that when the operator presses downward, the cover upper wall bends and presses the circuit board 66, which may adversely affect the circuit board 66.

  Further, when the operator holds the case 62 strongly in the thickness direction and engages the lock portion with the locked portion, the case 62 bends in the thickness direction, and the circuit board 66 in the case moves in the plate thickness direction. There was a concern that it could be adversely affected as well. These concerns can occur in the electrical junction box of Patent Document 2 as well.

  In view of the above points, the present invention efficiently and smoothly transmits force to the lock part on both sides of the case and the locked part on the attachment side without adversely affecting the circuit board or the like in the case. It is characterized by providing a mounting structure of an electric junction box that can be locked.

In order to achieve the above object, the electrical junction box mounting structure according to claim 1 of the present invention is provided with lock portions on both side wall portions of the junction box main body, and the junction box at a position inside the lock portion. In the electrical connection box mounting structure in which the lock portions are engaged with the locked portions on the mounting side by pushing the end portions on both sides of the main body, the end portions on both sides of the connection box main body gradually increase toward the outer end. When a pressing operation part having an inclined wall is provided to intersect the wall parts on both sides, and a pressing force is applied in a direction perpendicular to the inclined wall, each locking part enters each locked part with a uniform force. It is characterized by being engaged .

  With the above configuration, when the operator pushes the inclined pressing operation parts on both sides and attaches the electric junction box to the mounting side, the pressing force of each pressing operation part becomes a component force in the direction toward the outer locking parts. Each locking part is pressed against each locked part on the mounting side with a uniform force, and smoothly and reliably engages without tilting (one-sided contact) or the like.

  An electrical junction box mounting structure according to claim 2 is the electrical junction box mounting structure according to claim 1, wherein the lock portion is positioned in a direction perpendicular to the inclined surface of the pressing operation portion.

  With the above configuration, the component force in the outward inclination direction when each pressing operation part is pressed is directly transmitted (acted) to each locking part, and each locking part is pressed evenly against each locked part on the mounting side. Engage more smoothly and reliably.

  The electrical junction box mounting structure according to claim 3 is the electrical junction box attachment structure according to claim 1 or 2, wherein the junction box body is a main cover having an opening, and the sub cover is inserted into the opening. The pressing operation portion is arranged on the wall portion side opposite to the opening of the main cover.

  With the above configuration, the lock portion and the pressing operation portion are integrally provided on the main cover, and the force when the pressing operation portion is pressed is not absorbed by other parts (for example, the upper cover is attached to the main cover) When the pressing operation portion is provided on the upper cover, the pressing force is directly transmitted to the locking portion (which is easily absorbed by the play at the joint portion between the main cover and the upper cover), and the locking operation is performed reliably. The sub cover closes the opening of the main cover, and for example, accommodates the terminals of the circuit board in the main cover and acts as a connector.

  According to the first aspect of the present invention, when the electrical junction box is mounted on the mounting side of the vehicle body or the like, each locking portion is pressed against the locked portion on the mounting side by the pressing force of each inclined pressing operation portion. However, since the electric connection box is smoothly and reliably engaged with a uniform force, the electric connection box is smoothly and reliably attached to the attachment side without being inclined, and the attachment workability (mountability) of the electric connection box is improved. In addition, the operator does not press any part other than the pressing operation part, and the deformation of the connection box body and the deformation and damage of the internal circuit board resulting from the deformation are prevented, and the reliability of the electrical connection is ensured. The

  According to the second aspect of the present invention, since the component force when the respective pressing operation parts are pressed acts directly on the respective locking parts, the effect of the first aspect of the invention is promoted.

  According to the invention described in claim 3, since the lock portion and the pressing operation portion are integrated by the main cover, the pressing operation force is directly transmitted to the locking portion, and the effect of the invention according to claims 1 and 2 is promoted. Is done. This is particularly effective when the main cover is thin and deep, and can be opposed to space saving on the mounting side.

  1 to 3 show an embodiment of an electric junction box mounting structure according to the present invention. FIG. 1 is an external front view, FIG. 2 is a perspective view showing the inside by cutting the front side, and FIG.

  As shown in FIG. 1, the electrical junction box 1 includes a synthetic resin main cover (case or junction box body) 2 having a lower opening 3, and a synthetic resin undercover (sub cover) engaged with the lower opening 3. 4, each of the lock portions 7 is provided on vertical wall portions (side walls) 5 and 6 on both the left and right sides of the main cover 2, and each lock portion 7 is provided on each of the left and right sides of the horizontal upper wall 8 of the main cover 2. It has the press operation parts 11 and 12 which inclined in the substantially reverse C shape for engaging with the to-be-locked part 9 (FIG. 2) of an attachment side.

  The main cover 2 is formed narrow (thin) in the front-rear direction and wide in the left-right direction. The upper wall 8 of the main cover 2 is formed such that the right half is low and the left half is high through the step 13 in the longitudinal intermediate portion, the inclination angle of the right pressing operation part 11 is small, and the pressing operation part 11 The inclined surface (inclined wall) 14 is long, the inclination angle of the left pressing operation portion 12 is large, and the inclined surface (inclining wall) 15 of the pressing operation portion 12 is short.

  The right pressing operation unit 11 is linearly inclined upward toward the right side wall 5, and the left pressing operation unit 12 is linearly inclined upward toward the left side wall 6. The inclined surfaces 14 and 15 of the pressing operation portions 11 and 12 are gradually increased toward the outer ends 14a and 15a. Each of the pressing operation portions 11 and 12 is formed so as to protrude upward in a substantially right triangle shape so that it has a top portion (substitute with reference numerals 14a and 15a) above the side walls 5 and 6. The inclined surfaces 14 and 15 of the pressing operation portions 11 and 12 continue to intersect the outer surfaces of the side walls 5 and 6 at an acute angle, and continue to the upper surface of the upper wall 8 at an obtuse angle.

  The left and right lock portions 7 have the same shape and the same position (height), and the vertical distance from the right press operation portion 11 to the right lock portion 7 is short. The vertical distance to the lock portion 7 is long. An imaginary line 16 orthogonal to the inclined surfaces 14 and 15 of the pressing operation portions 11 and 12 intersects the lock portions 7. At least an imaginary line 16 orthogonal to the extension line 17 of the inclined surfaces 14 and 15 of the pressing operation parts 11 and 12 intersects the lock part 7.

  The under cover 4 that closes the lower opening 3 of the main cover 2 is fixed to the front and rear wall portions 18 of the main cover 2 by locking means. The locking means of this example is constituted by a locking projection 19 on the lower end side of the main cover 2 and a notch hole 21 in the outer wall 20 before and after the under cover 4 (the locking means is appropriately set). In the present embodiment, the front, rear, top, bottom, left, and right directions are for convenience of explanation, and do not necessarily coincide with the mounting direction of the electrical junction box 1 on the mounting side.

  As shown in FIG. 2, the circuit board assembly 22 is arranged vertically in the main cover 2 and supported by the under cover 4. The circuit board assembly 22 includes a circuit board 23, a fuse connector block 24 provided in the upper left half of the circuit board 23, and a connector block 25 provided in the lower part of the circuit board 23.

  Electrical components such as a plurality of relays 26 and resistors 27 are surface-mounted and connected to an intermediate portion in the height direction of the circuit board 23. A printed circuit (not shown) is formed in a required form on the back surface of the circuit board 23, and a bus bar circuit (not shown) is routed in an intermediate portion in the thickness direction of the circuit board 23. These electrical components and circuits are appropriately set as necessary.

  The upper fuse connector block 24 includes a block main body 28 made of an insulating resin and a plurality of pin terminals 29 for connecting fuses, which are fixedly penetrated to the block main body 28. The block main body 28 protrudes and is fixed to the surface side of the circuit board 23. The front end side of the clamping terminal 29 is accommodated in the cavity of the fuse mounting portion 30 on the upper wall side of the main cover 2, and the base end side is soldered to the back side of the circuit board 23.

The lower connector block 25 includes a horizontal plate-like block main body 31 made of insulating resin and a plurality of tab terminals 32 that are fixedly penetrated to the block main body 31. The block body 31 protrudes and is fixed to the surface side of the circuit board 23. The distal end side of the tab terminal 32 protrudes into the connector fitting chamber 33 of the under cover 4 to constitute a connector, and the proximal end side is soldered to the back side of the circuit board 23. Numeral 32 ₁ in FIG. 2 is a terminal for power supply input. The connector (substitute with reference numeral 33) is fitted and connected with a connector of an external wire harness (not shown).

  The lock portions 7 (FIG. 1) on both sides of the main cover 2 engage with the locked portions 9 of the resin unit 34 on the vehicle body side that is the mounting side. FIG. 2 shows a state before engagement with the locked portion 9. Each lock portion 7 is positioned between a pair of front and rear vertical slide engagement portions 35 having an L-shaped cross section (only one slide engagement portion 35 is shown in FIG. 2) and the pair of slide engagement portions 35. It is comprised with the latching protrusion 36 to do. The locking projection 36 has an upward locking surface and a downward inclined guide surface.

  The locked portion 9 is positioned between the pair of guide portions 37 and the vertical guide portions 37 that engage with the grooves on the inner side of the slide engaging portions 35, and is upwardly engaged with the locking projections 36. It is comprised with the arm-shaped flexible frame part 38. FIG. The flexible frame portion 38 has a window portion 38a for allowing the locking projection 36 to enter inside.

  The flexible frame portion 9 is provided on the left and right vertical wall portions 39 on the inner side of the resin unit 34, and the rear vertical wall portion 40 is orthogonal to the left and right wall portions 39. The electric junction box 1 is pushed and mounted from above. For example, the front wall portion (not shown) is positioned to face the rear wall portion 40, and the electrical junction box 1 is inserted into a space surrounded by the front, rear, left and right wall portions 39, 40. The electric connection box 1 is pushed in smoothly and reliably when the operator presses the pressing operation portions 11 and 12 on both sides of the upper portion of the main cover 2 with, for example, the thumbs of both hands.

  FIG. 3 shows a state where the push-in is completed, that is, the slide engagement portion 35 of the main cover 2 is slidably engaged with the guide portion 37 on the attachment side, and at the same time, the locking protrusion 36 of the main cover 2 The locked state engaged with is shown. The downward inclined surface of the locking projection 36 in FIG. 2 smoothly slides on the upper end of the flexible frame portion 38 and flexes the flexible frame portion 38 outward to enter the window portion 38a. The frame portion 38 is elastically restored inward to lock the locking projection 36.

  A plurality of thin non-slip ridges 42 (FIG. 3) are provided close to the upper surfaces, that is, the inclined surfaces, of the inclined walls 14 and 15 of the pressing operation portions 11 and 12, respectively. A rib 41 is suspended from the inner surface of the upper wall 8 of the main cover 2, and the upper end of the circuit board 23 is in contact with the lower end of the rib 41.

  When the operator presses both the pressing operation portions 11 and 12 downward, the pressing operation portions 11 and 12 are inclined obliquely upward as they go to the outer end portions. , 12 in the direction orthogonal to the inclined surfaces 14 and 15, that is, in the directions of the lock portions 7 and the locked portions 9 (to be precise, the downward pressing force and the diagonally outward pressing force are simultaneously applied as vectors. ), Each of the locking portions 7 is smoothly and reliably engaged with each of the locked portions 9 with a uniform force by the oblique outward force. The diagonally outward force uniformly presses each lock portion 7 against each locked portion 9 diagonally outward (downward), so that each of the left and right lock portions 7 can be locked with a uniform pressing force without variation in the pressing force. Entry engagement with part 9.

  FIG. 4 shows another embodiment of the electrical junction box mounting structure according to the present invention.

  The electrical connection box 1 ′ has a mounting structure in which one pressing operation part 11 ′ of a synthetic resin main cover (case) 2 ′ is formed to project outward from one side wall 5 ′ and the other pressing operation part 12 is formed. It differs from the mounting structure of the above-described embodiment in that 'is formed from the upper wall 8' of the main cover 2 'to the upper end of the other side wall 6'. Since the other configuration is basically the same as that of the above-described embodiment, the same reference numerals are given to the same components, and detailed description will be omitted.

  In the upper wall 8 'of the main cover 2' in FIG. 4, a connector housing 43 protrudes from the right half, and a fuse mounting portion 30 'is provided at the left half. An upward terminal 44 of the circuit board 23 ′ protrudes into the connector housing 43 to constitute a connector.

  One pressing operation portion 11 ′ is disposed on the upper side of one side wall 5 ′ suspended from the corner of the main cover 2 ′ on the connector housing 43 side, and is inclined obliquely upward as it goes outward from the side wall 5 ′. It is composed of an inclined wall (inclined surface) 14 ′ and an outer wall 45 that hangs down from the top of the inclined wall 14 ′. The outer wall 45 is provided with a slide engaging portion 35 ′ that is a lock portion 7 ′ and a locking projection 36 ′. It has been. The lower side of the inclined wall 14 'is hollow.

  An imaginary line 16 'perpendicular to the upper surface of the inclined wall 14', that is, the inclined surface (substitute with reference numeral 14 ') intersects the lock portion 7' and is inclined to the lock portion 7 'when the inclined surface 14' is pushed downward. An outward force (component force) is applied, and the component force smoothly and reliably engages the locked portion (reference numeral 9 in FIG. 2) on the attachment side. The same applies to the other pressing operation portion 12 '.

  The other pressing operation portion 12 'has an inclined wall 15' similar to that of the above embodiment. An inclined line 15 'or an imaginary line 16' perpendicular to the extended line 17 'of the inclined wall 15' intersects the lock portion 7 '. The inclined surfaces 14 ′ and 15 ′ of the pressing operation portions 11 ′ and 12 ′ are gradually increased toward the outer ends 14 a ′ and 15 a ′.

  In FIG. 4, reference numeral 22 'denotes a circuit board assembly, 46 denotes a connector block having a structure including an upper fuse connector block 24', 25 'denotes a lower connector block, 26' denotes a relay, 3 'denotes a main cover 2'. The lower openings 4 'indicate undercovers.

  In each of the above embodiments, the main covers 2 and 2 'are the connection box main body. However, the main body having the upper opening (not shown) and the upper cover (not shown) constitute the connection box main body. Or an upper cover and an under cover are assembled to a main cover (not shown) having upper and lower openings to form a junction box body, and pressing operation portions 11, 12, 11 ', 12' are provided on both sides of each upper cover. It is also possible to provide it.

  In each of the above embodiments, the electrical connection boxes 1 and 1 ′ are arranged vertically (vertically) and pressed downward to be locked to the mounting side. For example, the electrical connection boxes 1 and 1 ′ are placed horizontally. (Horizontal) or diagonally arranged and pressed sideways or diagonally downward to be locked to the mounting side. In this case, the upper wall 8 of the case 2 in FIG. 1 is referred to as a front wall, and the lower opening 3 is referred to as a rear opening.

  Further, in each of the above embodiments, the lock portion 7 and the locked portion using the slide engaging portion 35 and the locking projection 36 as the lock portion 7 and the guide portion 37 and the flexible frame portion 38 as the locked portion 9 are used. The configuration of the portion 9 is not limited to this. For example, the guide portion 37 and the flexible frame portion 38 are used as the lock portion 7, the slide engagement portion 35 and the locking protrusion 36 are used as the locked portion 9, or the slide It is also possible to form the engaging portion 35 and the guide portion 37 in a T-shaped cross section, or to use a cantilever arm, a dual-support arm, or an engaging protrusion instead of the flexible frame portion 38. .

  Moreover, in each said embodiment, although inclined surface 14,15,14 ', 15' of press operation part 11,12,11 ', 12' was formed planarly (cross-section linear), for example, an inclined surface is formed. It is also possible to form a cross-sectional arc shape that increases in a quadratic curve toward the outer end.

It is a front view which shows one Embodiment of the attachment structure of the electrical junction box which concerns on this invention. It is a perspective view which shows the state which similarly mounts | wears with the electrical connection box on the attachment side. It is a principal part perspective view which shows the state which mounted | wore the attachment side with the electrical junction box. It is a longitudinal cross-sectional view which shows other embodiment of the attachment structure of the electrical junction box which concerns on this invention. 1A and 1B show a form of a conventional electric junction box, in which FIG. 1A is a longitudinal sectional view, and FIG.

Explanation of symbols

1,1 'electric connection box 2,2' main cover (connection box body)
3, 3 'opening 4, 4' under cover (sub cover)
7, 7 'Lock part 8, 8' Upper wall (wall part)
9 Locked part 11, 12, 11 ', 12' Press operation part 14, 15, 14 ', 15' Inclined surface

Claims (3)

Electricity is provided to provide locking portions on both wall portions of the junction box body, and press the end portions on both sides of the junction box body at positions inside the locking portion to engage each locking portion with each locked portion on the mounting side. in the mounting structure of the junction box, the end portions on both sides of the junction box body, the pressing operation portion having a gradually becomes higher inclined wall toward the outer end is provided to intersect the walls of the both side, to the inclined wall An attachment structure for an electrical junction box , wherein when a pressing force is applied in a direction perpendicular to each other, each locking portion is engaged and engaged with each locked portion with a uniform force .   The electrical connection box mounting structure according to claim 1, wherein the lock portion is positioned in a direction orthogonal to the inclined surface of the pressing operation portion.   The junction box body is a main cover having an opening, a sub-cover is inserted into the opening, and the pressing operation portion is disposed on a wall side opposite to the opening of the main cover. The attachment structure of the electrical junction box according to claim 1 or 2.

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