JP2013059187A - Electric connection box and assembly method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box 1 which inhibits dust from intruding and reduces the number of components without impairing the assembly workability, and to provide an assembly method of the electric connection box 1.SOLUTION: An electric connection box 1 includes a bus bar circuit body 300 having multiple connector terminals, an upper case 100, and a lower case 200 and is formed by assembling the upper case 100 to the lower case 200 so that the upper case 100 overlaps with the lower case 200 with the bus bar circuit body 300 disposed therebetween. The upper case 100 has openings in the protruding direction of the connector terminals, and connector housings that house the connector terminals are integrally formed with the upper case 100. Terminal insertion parts, allowing the connector terminals to be inserted from the overlapping direction of the upper case 100 and the lower case 200, are formed at the connector housings, and the lower case 200 includes closing parts which close the connector terminals by fitting thereinto from the overlapping direction.

Description

  The present invention relates to an electric junction box such as an ECU or a junction box that accommodates an electric circuit body such as a printed circuit board in a vehicle such as an automobile.

  Electricity such as an ECU that is mounted on a vehicle such as an automobile and relays or branches the wires of a wire harness or the like, or an ECU that controls the engine by receiving a sensor signal electrically connected via the wires. There is a connection box.

  Since this electrical junction box is not usually touched by the user, it must be installed in a relatively dusty place such as near the user's feet in the vehicle cabin, inside the instrument panel, or in the engine room outside the vehicle cabin. There are many.

  A printed circuit board type or bus bar type electric circuit body is accommodated and fixed inside the electric junction box. Moreover, the electric circuit body has a connection terminal projecting to the outside, and establishes an electrical connection with various devices and the like by fitting with the connection terminal of the connector connected to the electric wire. For this reason, the electrical connection box is provided with a connector housing that accommodates a connection terminal protruding outside and holds the connector.

  For example, in Patent Document 1, an electric circuit body in which the protruding directions of a plurality of fuse terminals and a power supply terminal are shifted by 90 degrees in the plane direction, and a fuse cavity for a fuse terminal and a connector housing for a power supply terminal There has been proposed an electrical junction box including a fuse holder integrally formed with the.

  According to Patent Document 1, the connector housing of the fuse holder can be assembled from the side surface direction of the electrical junction box by forming a slit through which the power supply terminal is inserted. As a result, in the electrical junction box having the fuse terminals and the power supply terminals that are in a positional relationship where the projecting directions are shifted by 90 degrees, the connector housing can be assembled at the same time as the fuse cavity is assembled.

  However, since the electrical junction box of Patent Document 1 has a slit through which the power supply terminal is inserted in the connector housing, dust or the like enters the base of the power supply terminal from the slit, resulting in a short circuit or poor contact. There is a fear. Moreover, since the electrical junction box of Patent Document 1 is composed of an upper cover, a controller cover, and a fuse holder, there is a problem that the number of parts is large and it is difficult to reduce the weight and the assembly man-hours.

  Furthermore, since the assembly direction (vertical direction) of the upper cover and the controller cover is different from the assembly direction of the fuse holder, there is a problem that the assembly workability of the electrical junction box is poor.

JP 2006-187053 A

  In view of the above-described problems, the present invention provides an electrical junction box and an electrical junction box assembly method that can reduce the number of parts while suppressing the entry of dust and without impairing the assembly workability. For the purpose.

  The present invention provides an electric circuit body having an electric circuit pattern on a plate surface of a substantially plate-like insulating plate having insulating properties and at least one connection terminal portion protruding laterally in the in-plane direction of the insulating plate. A first case that covers the electric circuit body from one plate surface side of the insulating plate, and a second case that covers the electric circuit body from the other plate surface side of the insulating plate, An electrical connection box that is assembled so that the first case and the second case are overlapped with the electric circuit body sandwiched in a direction substantially perpendicular to the first case, wherein the connection terminal portion protrudes from the first case. A terminal housing that has an opening in a direction and that accommodates the connection terminal portion, and allows the connection terminal portion to be inserted into the housing from the overlapping direction of the first case and the second case. Part was formed, in the second case, by fitting from the superposition direction, characterized by comprising a closing portion for closing the terminal insertion portion.

The side in the in-plane direction can be the outside of the insulating plate in a substantially two-dimensional plane, assuming that the plate surface of the insulating plate is a substantially two-dimensional plane.
The connection terminal portion can be a connector terminal, a fuse terminal, or the like.

The electric circuit body can be a printed circuit board system or a bus bar system.
The housing may be a connector housing that houses connector terminals, a fuse housing that houses fuse terminals, or the like.

According to the present invention, it is possible to configure an electric junction box that can reduce the number of parts while suppressing intrusion of dust and without impairing the assembling workability.
Specifically, since the housing is integrally formed with the first case, there is no need for fixed parts for fixing the housing, and the number of parts of the electrical junction box is reduced, thereby reducing the weight of the electrical junction box and reducing the assembly man-hours. Reduction can be achieved. Thereby, the electrical connection box can aim at cost reduction.

  Further, the electrical junction box can be assembled in a direction substantially perpendicular to the insulating plate so that the first case and the second case are overlapped with the electrical circuit body interposed therebetween. And the terminal connection part which protruded to the side in the surface direction of an insulating board by the terminal insertion part of a housing can be accommodated in a housing from the overlapping direction of a 1st case and a 2nd case.

  That is, the electrical connection box can accommodate the connection terminal portion in the housing integrally formed with the first case, while assembling the first case and the second case with the electric circuit body interposed therebetween. Thereby, the electrical junction box can efficiently assemble the electrical circuit body having the connection terminal portion.

  In addition, even if the electrical junction box is an electrical circuit body having a plurality of connection terminal portions, the electrical junction box can be efficiently assembled in the same manner. For example, even when the protruding direction of the connection terminal portion intersects in the in-plane direction of the insulating plate, the electric connection box is assembled with the first case and the second case at the same time as connecting the terminal to the housing. Parts can be accommodated.

  Furthermore, since the first case and the second case are assembled with the electric circuit body interposed therebetween, the terminal insertion portion of the first case is closed by the closing portion of the second case. Exposure can be suppressed. Thereby, it can suppress that dust etc. penetrate | invade into the base of a connection terminal part. Furthermore, it can suppress that dust etc. penetrate | invade from the base part of a connection terminal part to the inside of an electrical-connection box.

  Therefore, the electrical junction box can reduce the number of parts without reducing the intrusion of dust and without impairing the assembly workability.

  As an aspect of the present invention, the closing part of the second case is fitted in the terminal insertion part in a projecting direction of the connection terminal part and in a cross section substantially perpendicular to the insulating plate. A fitting portion formed in a vertical cross-sectional shape, and a substantially flat plane portion facing the housing, the fitting portion extending in the protruding direction of the connection terminal portion on the plane portion, and A flat protrusion projecting toward the housing, and a base-side end portion in the protruding direction of the flat protrusion standing toward the housing, and sandwiching the base portion of the connection terminal portion with the terminal insertion portion The substantially L-shaped vertical cross-sectional shape can be formed by the support portion supported by the above.

  According to the present invention, since the base portion of the connection terminal portion is sandwiched and supported by the terminal insertion portion and the support portion of the housing, the electrical connection box can reliably support the connection terminal portion within the housing. Thereby, a deformation | transformation of the connection terminal part at the time of connector attachment / detachment can be suppressed.

  Moreover, since a fitting part fits into a terminal insertion part, the twist of the housing at the time of connector attachment / detachment can be suppressed. Furthermore, since the housing can be supported from the second case side by the flat portion of the second case, deformation of the housing can be suppressed against a load in the overlapping direction that is easily applied to the housing when the connector is attached and detached.

  Therefore, the electrical junction box can more reliably suppress the intrusion of dust and also suppress the deformation of the housing.

  Further, as a mode of the present invention, the closed portion of the second case is formed in a dimension substantially equal to the dimension in the short side direction and the long side direction of the connection terminal portion in the viewpoint direction along the overlapping direction. be able to.

  The viewing direction along the superimposing direction can be a plan view or a bottom view if the vertical direction with respect to the insulating plate is the vertical direction of the electrical junction box. Alternatively, when the overlapping direction is the left-right direction in the electrical junction box, the side view can be obtained, and when the overlapping direction is the front-rear direction, the front view or the rear view can be obtained.

  According to the present invention, it is possible to minimize the gap between the opening of the housing by the terminal insertion portion and the connection terminal portion in the viewpoint direction along the overlapping direction. Thereby, since the opening ratio by the terminal insertion part in a housing can be made small, the deformation | transformation of the housing at the time of connector attachment / detachment can be suppressed more.

  Moreover, in the housing which accommodates a plurality of connection terminal portions, the same number of terminal insertion portions as the connection terminal portions can be provided as slit-like openings. That is, compared with the case where a plurality of connection terminal portions are allowed to be inserted by one terminal insertion portion, it is possible to make the aperture ratio of the terminal insertion portion in the housing smaller. Thereby, the deformation | transformation of the housing at the time of connector attachment / detachment can be suppressed more.

  In addition, by forming the fitting portion of the second case into a substantially L-shaped vertical cross-sectional shape that fits into the terminal insertion portion in the protruding direction of the connection terminal portion and the cross section in a direction substantially perpendicular to the insulating plate. The electrical junction box can complicate the intrusion path of dust and the like from the outside of the housing to the base of the connection terminal portion.

  That is, since a step can be formed with respect to the intrusion direction of dust and the like, the distance of the intrusion path of dust and the like can be made longer than a linear distance. Thereby, the electrical junction box can suppress more reliably that dust reaches | attains the base part of a connection terminal part. In other words, it is possible to prevent dust and the like from entering the inside of the electrical connection box, and to prevent a short circuit or poor contact due to dust or the like.

  Therefore, the electrical junction box can more reliably suppress the intrusion of dust and also suppress the deformation of the housing.

  Further, as an aspect of the present invention, the electric circuit body has a configuration in which a plurality of the connection terminal portions are arranged with a predetermined interval in the overlapping direction, and between the connection terminal portions in the overlapping direction, An intermediate support portion that sandwiches and supports the base portion of the connection terminal portion may be provided together with the housing and the closing portion.

  According to the present invention, even when a plurality of connection terminal portions are arranged in the overlapping direction, the intermediate support portions can support the connection terminal portions. The intermediate support portion can sandwich the base portion of the connection terminal portion together with the housing and the closing portion. That is, the electrical junction box can reliably support the base portion of the connection terminal portion. Furthermore, even if a plurality of connection terminal portions are arranged in the overlapping direction, the electrical connection box can reduce the gap at the base portion of the connection terminal portion.

  Therefore, even when a plurality of connection terminal portions are arranged in the overlapping direction, the electrical connection box can more reliably suppress the intrusion of dust.

  Further, the present invention provides an electric circuit pattern having an electric circuit pattern on a plate surface of a substantially plate-like insulating plate having an insulating property, and at least one connection terminal portion protruding laterally in the in-plane direction of the insulating plate. A circuit body, a first case that covers the electric circuit body from one plate surface side of the insulating plate, and a second case that covers the electric circuit body from the other plate surface side of the insulating plate, A method of assembling an electric junction box for assembling the first case and the second case with the electric circuit body sandwiched in a direction substantially perpendicular to a plate, wherein the electric case is attached to the first case. The connection terminal portion is integrally formed with an opening in the projecting direction of the connection terminal portion, and the terminal insertion portion of the housing that houses the connection terminal portion from the overlapping direction of the first case and the second case. Insertion And permitting, by the closed portion of the second case, the overlay is fitted from the direction, characterized in that closing the terminal insertion portion.

  According to the present invention, it is possible to provide a method for assembling an electric junction box that can reduce the number of parts without impairing dust intrusion and without impairing the assembling workability.

  According to the present invention, it is possible to provide an electric junction box and an electric junction box assembling method capable of suppressing dust intrusion and reducing the number of parts without impairing assembling workability.

The external appearance perspective view from the upper part which shows the external appearance of an electrical-connection box. The exploded perspective view from the upper part which shows the structure of an electrical junction box. FIG. 4 is a partially enlarged perspective view showing the bottom side of the first, second, and third connector housings in FIG. 2. The partial expansion perspective view which shows the 1st and 2nd fuse terminal in FIG. The partial expansion perspective view which shows the right obstruction | occlusion part of the lower case in FIG. AA arrow sectional drawing in FIG. The partial expansion perspective view which shows the assembly | attachment state in a 1st, 2nd and 3rd connector housing.

An embodiment of the present invention will be described below with reference to the drawings.
1 shows an external perspective view of the electrical junction box 1 from above, FIG. 2 shows an exploded perspective view of the electrical junction box 1 from above, and FIG. 3 shows the first connector housing 111 and the second connector in FIG. A partially enlarged perspective view of the bottom side of the connector housing 112 and the third connector housing 113 is shown. 4 is a partially enlarged perspective view of the first fuse terminal 343 and the second fuse terminal 344 in FIG. 2, and FIG. 5 is a partially enlarged perspective view of the right closing portion 215 of the lower case 200 in FIG. 6 shows a cross-sectional view taken along line AA in FIG. 1, and FIG. 7 shows a partially enlarged perspective view of the first connector housing 111, the second connector housing 112, and the third connector housing 113 in the assembled state. . However, illustration of the fuse cover 2 and the relay 3 is omitted in FIG.

  Further, the upper surface (upward direction) of the electrical connection box 1 in this specification is the upward direction in the figure, the bottom surface (downward direction) of the electrical connection box 1 is the downward direction in the figure, and the front surface (front) of the electrical connection box 1 Direction, front part) is the lower left direction in the figure, and the rear surface (rear direction, rear part) of the electrical junction box 1 is the upper right direction in the figure. Furthermore, the left side surface (left direction, left end) of the electrical connection box 1 is the upper left direction in the figure, and the right side surface (right direction, right end) of the electrical connection box 1 is the lower right direction in the figure. However, only in FIG. 2, the upward direction in the figure is the bottom surface of the electrical junction box 1.

  As shown in FIG. 1, the electrical junction box 1 includes a substantially square top plate 101 in a plan view, and a right side surface portion 10, a front surface portion 20, a left side surface portion 30, and a rear surface portion 40 disposed below the periphery of the top plate 101. The bottom plate 201 disposed below and facing the top plate 101 forms a substantially box shape having a predetermined thickness in the vertical direction.

  The right side surface portion 10 serving as the right side surface of the electrical junction box 1 includes a right front wall portion 110, a first connector housing 111, a second connector housing 112, a third connector housing 113, and a right rear wall portion 114 in order from the front direction. doing. The first connector housing 111 has an opening in the right direction and is formed in a substantially concave cylindrical shape when viewed from the right side. Each of the second connector housing 112 and the third connector housing 113 has an opening in the right direction and is formed in a substantially convex cylindrical shape when viewed from the right side.

  The front surface portion 20 which is the front surface of the electrical junction box 1 is constituted by a first fuse housing and a second fuse housing which will be described in detail later, and the fuse cover 2 is fitted and fixed so as to cover them. At the right end of the fuse cover 2, a cover fitting hole 2a that fits into the right front wall 110 is formed.

  The left side surface portion 30 that is the left side surface of the electrical junction box 1 includes a left wall portion 130 and one fourth connector housing 131 in order from the front direction. The fourth connector housing 131 has an opening in the left direction and is formed in a substantially convex cylindrical shape when viewed from the left side.

The rear surface portion 40 that is the rear surface of the electrical junction box 1 is configured by a substantially flat rear wall portion 140.
A relay 3 inserted from above the electrical junction box 1 is provided near the left edge of the top plate 101.

  More specifically, the substantially box-shaped electrical junction box 1 is configured in a substantially box shape by assembling an upper case 100 and a lower case 200 in the vertical direction as shown in FIG. Furthermore, a bus bar circuit body 300 is accommodated in the electrical junction box 1.

  This bus bar circuit body 300 forms a desired circuit pattern with an insulating plate 310, a relay terminal 320 provided on the upper surface of the insulating plate 310, and a plurality of bus bars 330 fixed to the upper and lower surfaces of the insulating plate 310. ing.

  The insulating plate 310 is a synthetic resin material having insulating properties and is formed in a substantially flat plate shape facing the top plate 101. On the plate surface of the insulating plate 310, a plurality of irregularities for fixing the bus bar 330 are formed at positions corresponding to a desired circuit pattern.

  Further, a fuse holder 311 capable of holding a plurality of fuses 4 is formed at the front edge of the insulating plate 310. In addition, the insulating plate 310 forms an intermediate support portion corresponding to a third connector terminal 342 and a second fuse terminal 344 described later. This intermediate support will be described in detail later.

  The bus bar 330 is formed by punching a thin plate made of a copper alloy material or the like facing the top plate 101 into an appropriate shape according to a desired circuit pattern. The bus bar 330 protrudes from the outer peripheral edge of the insulating plate 310 in the left-right direction or the front-rear direction, and forms a plurality of connector terminals accommodated in each connector housing.

  More specifically, the bus bar 330 includes a first connector terminal 340 accommodated in the first connector housing 111, a second connector terminal 341 accommodated in the second connector housing 112, and a third connector terminal 342 accommodated in the third connector housing 113. Is formed to project rightward from the right edge of the insulating plate 310.

As shown in FIGS. 2 and 3, the first connector terminal 340 is formed to protrude from the bus bar 330 fixed to the upper surface of the insulating plate 310.
As shown in FIGS. 2 and 3, the second connector terminal 341 includes a terminal 341 a and a terminal 341 b that are formed to protrude from the bus bar 330 fixed to the lower surface of the insulating plate 310, and are arranged in parallel in the front-rear direction. ing.

  As shown in FIGS. 2 and 3, the third connector terminal 342 is formed to protrude from a plurality of bus bars 330 fixed to the upper surface of the insulating plate 310, and has six terminals 342 a arranged in parallel in the front-rear direction, and a lower surface The six terminals 342b protruding from the bus bar 330 fixed to the front and rearwardly arranged in the front-rear direction are arranged so as to overlap in the vertical direction with the insulating plate 310 interposed therebetween.

  Further, as shown in FIGS. 3 and 6, between the bases of the terminals 342a and 342b of the third connector terminal 342, the insulating plate 310 protrudes rightward from the right edge, and the terminals 342a and 342 An intermediate support portion 312 that contacts the terminal 342b is formed.

  2 and 4, the bus bar 330 includes a first fuse terminal 343 accommodated in a first fuse housing 120 described later and a second fuse terminal 344 accommodated in a second fuse housing 121 described later. The insulating plate 310 is formed so as to protrude forward from the front edge of the insulating plate 310.

  A plurality of first fuse terminals 343 protrude from the bus bar 330 fixed to the upper surface and the lower surface of the insulating plate 310 with the fuse holder 311 formed on the insulating plate 310 interposed therebetween. It is formed in a shape that establishes a typical connection.

  As shown in FIG. 4, the second fuse terminal 344 includes terminals 344 a, 344 b, and 344 c that protrude in the forward direction from the front edge of the insulating plate 310 and are arranged in parallel in the left-right direction.

  The terminals 344 a, 344 b, and 344 c are a terminal that protrudes from the bus bar 330 fixed to the upper surface of the insulating plate 310 and a terminal that protrudes from the bus bar 330 fixed to the lower surface of the insulating plate 310. It is arranged and arranged so as to overlap in the vertical direction across the wall.

  Furthermore, the insulating plate 310 forms an intermediate support portion 313 that protrudes forward from the front edge end between the base portions of the terminals 344a, 344b, and 344c. The intermediate support portion 313 is formed in the same manner as the intermediate support portion 312 except that the protruding direction is different from the intermediate support portion 312 of the third connector terminal 342.

  Further, as shown in FIG. 2, the bus bar 330 is formed with a fourth connector terminal 345 accommodated in the fourth connector housing 131 so as to protrude leftward from the rear portion of the left edge of the insulating plate 310.

  The fourth connector terminal 345 is formed in the same manner as the third connector terminal 342 except that the fourth connector terminal 345 is different from the third connector terminal 342 in the protruding direction, and thus detailed description thereof is omitted. The insulating plate 310 forms an intermediate support portion (not shown) corresponding to the fourth connector terminal 345.

  Next, as shown in FIGS. 1 and 2, the upper case 100 that covers the bus bar circuit body 300 from above is provided with a top plate 101, a right side surface portion 10, a front surface portion 20, and a left side surface portion 30 that are upper surfaces of the electrical connection box 1. And the rear surface portion 40.

  The top plate 101 is formed as a substantially rectangular flat plate in plan view. Further, in the vicinity of the left edge of the top plate 101, a relay holding portion 102 that holds the relay 3 is erected upward.

The right front wall portion 110 of the right side surface portion 10 has a cover fitting claw portion 110a that fits with the cover fitting hole portion 2a of the fuse cover 2 in the front-rear direction, and a case fitting hole that fits with the lower case 200 in the vertical direction. Part 110b is formed.
A case fitting hole (not shown) for fitting with the lower case 200 is formed in the right rear wall portion 114 of the right side surface portion 10.

  Moreover, as shown in FIG. 3, the 1st terminal insertion part 111a which accepts the insertion of the 1st connector terminal 340 from the downward direction is formed in the bottom face of the 1st connector housing 111 of the right side part 10. As shown in FIG.

  As shown in FIG. 3, the first terminal insertion portion 111 a is opened so as to cut out the first connector housing 111 in the vertical direction with a size substantially equal to the length and width of the first connector terminal 340 in the bottom view. Formed. Furthermore, the first terminal insertion portion 111a allows the base portion of the first connector terminal 340 to be viewed from above and below with the first connector fitting portion 211 of the lower case 200 described later in a state where the bus bar circuit body 300 is accommodated in the electrical connection box 1. It is formed so that it can be clamped.

  Further, a second terminal insertion portion 112a that allows the second connector terminal 341 to be inserted from below is formed on the bottom surface of the second connector housing 112. The second terminal insertion portion 112a is formed in the same manner as the first terminal insertion portion 111a of the first connector housing 111, but has two openings corresponding to the terminals 341a and 341b of the second connector terminal 341, respectively. Is different.

  In addition, a third terminal insertion portion 113 a that allows the third connector terminal 342 to be inserted from below is formed on the bottom surface of the third connector housing 113. The third terminal insertion portion 113a is formed in the same manner as the first terminal insertion portion 111a of the first connector housing 111, but has six slit-like openings corresponding to the number of terminals in plan view of the third connector terminal 342. Is different.

  Further, as shown in FIG. 2, the front surface portion 20 from which the fuse cover 2 has been removed includes a first fuse housing 120 and a second fuse housing 121 in order from the left.

  The first fuse housing 120 covers the left and right side surfaces and the upper surface of the fuse holder 311 having the first fuse terminal 343, and holds the fuse holder 311 having the first fuse terminal 343 from above when assembled. Forming.

  The second fuse housing 121 is formed in a substantially rectangular shape that is long in the left-right direction when viewed from the front, and is formed by juxtaposing fuse insertion ports 121a, 121b, and 121c that are opened substantially in the front-rear direction in a substantially square shape when viewed from the front. doing. The fuse insertion ports 121a, 121b, and 121c accommodate the terminals 344a, 344b, and 344c of the second fuse terminal 344, respectively.

  A fuse terminal insertion portion (not shown) that allows the second fuse terminal 344 corresponding to each fuse insertion port to be inserted from below is formed on the bottom surface of the second fuse housing 121.

The fuse terminal insertion portion is formed in the same manner as the first terminal insertion portion 111a of the first connector housing 111, but has a shape corresponding to the protruding direction, length, and width of the second fuse terminal 344 in plan view. It differs in the formation point.
The left wall portion 130 of the left side surface portion 30 is provided with two case fitting hole portions (not shown) for fitting with the lower cover 200 in the front-rear direction at a predetermined interval.

A fourth terminal insertion portion (not shown) that allows the fourth connector terminal 345 to be inserted from below is formed on the bottom surface of the fourth connector housing 131. The fourth terminal insertion portion is formed in the same manner as the third terminal insertion portion 113a of the third connector housing 113, except that an opening is formed in a direction corresponding to the fourth connector terminal 345.
The rear wall portion 140 constituting the rear surface portion 40 is provided with one case fitting hole portion (not shown) for fitting with the lower cover 200.

  Next, as shown in FIGS. 1 and 2, the lower case 200 that covers the bus bar circuit body 300 from below is formed in order from the front at the bottom plate 201 that is the bottom surface of the electrical junction box 1 and the right edge of the bottom plate 201. The right front fitting claw portion 210, the right closing portion 215, and the right rear fitting claw portion 216, the first fuse housing bottom portion 220, and the front closing portion 221 formed in order from the left in the front edge of the bottom plate 201, It consists of. Further, the lower case 200 includes a left fitting claw portion 230 and a left closing portion 231 formed in order from the front direction at the left edge of the bottom plate 201, and a rear fitting claw portion 240 formed at the rear edge of the bottom plate 201. It is composed.

The bottom plate 201 is opposed to the top plate 101 of the upper case 100 with the bus bar circuit body 330 interposed therebetween, and is formed as a flat plate having a substantially rectangular shape in plan view.
The right front fitting claw portion 210 is constituted by an inner wall surface portion 210a erected upward at the right edge end front portion of the bottom plate 201 and a claw portion 210b formed to protrude rightward from the inner wall surface portion 210a.

  As shown in FIGS. 2 and 5, the right closing portion 215 protrudes rightward from the right edge end of the bottom plate 201, and the first connector housing 111, the second connector housing 112, and the third connector housing 113. A substantially flat planar portion 214 facing the lower surface in the vertical direction, a first connector fitting portion 211, two second connector fitting portions 212, and six third connector fitting portions formed on the planar portion 214. 213.

The first connector fitting portion 211 is formed in a shape that fits into the first terminal insertion portion 111 a of the first connector housing 111.
Specifically, the first connector fitting portion 211 extends from the base portion of the plane portion 214 to the right and protrudes upward, and from the base side end of the plane portion 214 of the plane projection 211a. It is comprised with the support part 211b erected in the upward direction.

  The first connector fitting portion 211 has a substantially L-shaped vertical cross-sectional shape with the planar protrusion 211a and the support portion 211b in the right and vertical (vertical) sections from the base of the planar portion 214. Forming.

  Further, the planar protrusion 211a is formed to have a size substantially equal to the length and width of the first connector terminal 340 in plan view. Further, the support portion 211b is formed to have a size substantially equal to the width of the planar protrusion 211a in plan view. In addition, the support portion 211b is formed at a height at which the upper end abuts on the first connector terminal 340 in the assembled state.

  The second connector fitting portion 212 is formed in a shape that fits into two openings of the second terminal insertion portion 112 a in the second connector housing 112. The second connector fitting part 212 is formed in the same manner as the first connector fitting part 211, but has a shape corresponding to the second connector terminal 341 and the second terminal insertion part 112a. Different.

  The third connector fitting portion 213 is formed in a shape that fits into each of the six openings of the third terminal insertion portion 113 a in the third connector housing 113. The third connector fitting portion 213 is formed in the same manner as the first connector fitting portion 211, but has a shape corresponding to the third connector terminal 342 and the third terminal insertion portion 113a. Different.

  As shown in FIGS. 2 and 5, the right rear fitting claw portion 216 is formed so as to protrude upward from the inner wall surface portion 216 a and an inner wall surface portion 216 a erected upward at the rear portion of the right edge of the bottom plate 201. It is comprised with the nail | claw part 216b.

  As shown in FIG. 2, the first fuse housing bottom portion 220 covers the lower surface opening of the first fuse housing 120 of the upper case 100 and has a shape that holds the fuse holder 311 having the fuse terminal 343 from below. Yes. In addition, a holder holding portion 220a that holds and holds the right end of the fuse holder 311 is erected on the first fuse housing bottom 220 in an upward direction.

  As shown in FIG. 2, the front closing portion 221 is opposed to the bottom surface of the second fuse housing 121 in the vertical direction, and has a substantially flat planar portion 221 a that protrudes forward from the front edge end of the bottom plate 201. It is composed of three second fuse fitting portions 222 formed on the portion 221a.

  The 2nd fuse fitting part 222 is formed in the shape which each fits to the opening of the fuse terminal insertion part of fuse insertion port 121a, 121b, and 121c. The second fuse fitting portion 222 is formed in the same manner as the first connector fitting portion 211 corresponding to the first terminal insertion portion 111a, respectively, but the protruding direction, length, and length of the fuse terminal insertion portion in plan view The difference is that it is formed in a shape corresponding to the width.

  The left fitting claw portion 230 is formed by an inner wall surface portion 230a erected upward at the left edge of the bottom plate 201 and two claw portions (not shown) protruding leftward from the inner wall surface portion 230a.

  The left blocking portion 231 protrudes leftward from the rear end of the left edge of the bottom plate 201, and has a substantially flat planar portion 231a opposed to the bottom surface of the connector housing 131 in the vertical direction, and six formed on the planar portion 231a. The fourth connector fitting portion 232 is configured.

  The fourth connector fitting portion 232 is formed in a shape that fits into each of the six openings of the fourth terminal insertion portion in the fourth connector housing 131. Since the fourth connector fitting portion 232 is formed in the same manner as the third connector fitting portion 213 except that the formation direction is different from that of the third connector fitting portion 213, detailed description thereof is omitted. To do.

  The rear fitting claw portion 240 is formed by an inner wall surface portion 240a erected upward at the rear edge end of the bottom plate 201 and one claw portion (not shown) protruding rearward from the inner wall surface portion 240a.

  A method of assembling the upper case 100 and the lower case 200 in the vertical direction across the bus bar circuit body 300 in the electrical junction box 1 having the above configuration will be described.

  First, the bus bar circuit body 300 is assembled to the upper case 100 from below. At this time, the bus bar circuit body 300 accommodates the first connector terminal 340 in the upper case 100 while being inserted through the first terminal insertion portion 111a of the first connector housing 111 from below.

  Similarly, the second connector terminal 341 is inserted through the second terminal insertion portion 112a, the third connector terminal 342 is inserted through the third terminal insertion portion 113a, and the fourth connector terminal 345 is inserted through the fourth terminal insertion portion. Housed in the upper case 100.

  Further, in the bus bar circuit body 300, the terminals 344a, 344b, and 344c of the second fuse terminal 344 are inserted through the fuse terminal insertion portions of the corresponding fuse insertion ports 121a, 121b, and 121c from below in the same manner. Housed in the upper case 100. In addition, the fuse holder 311 having the first fuse terminal 343 is accommodated in the first fuse housing 120.

Subsequently, the lower case 200 is assembled to the upper case 100 that houses the bus bar circuit body 300 from below the upper case 100.
At this time, the lower case 200 is assembled to the upper case 100 while fitting the first connector fitting portion 211 to the first terminal insertion portion 111a of the first connector housing 111 from below the upper case 100.

  Similarly, the second connector fitting portion 212 is fitted to the second terminal insertion portion 112a, the third connector fitting portion 213 is fitted to the third terminal insertion portion 113a, and the fourth connector fitting portion 232 is It is assembled to the upper case 100 while being fitted to the 4-terminal insertion part.

  Further, the lower case 200 is assembled to the upper case 100 while fitting the second fuse fitting portions 222 to the respective fuse terminal insertion portions of the second fuse housing 121 from below the upper case 100. In addition, the holder holding part 220 a of the first fuse housing bottom 220 is locked to the fuse holder 311 provided with the first fuse terminal 343.

Then, the right front fitting claw portion 210 of the lower case 200 is fitted into the case fitting hole portion 110b of the upper case 100, and the other fitting claw portion is fitted into the case fitting hole portion in the same manner. 100 and the lower case 200 are assembled.
In this manner, the bus bar circuit body 300 is assembled so as to be sandwiched vertically between the upper case 100 and the lower case 200.

  Here, as an example of the assembled state in each connector housing, as shown in FIG. 7, the first connector housing 111, the second connector housing 112, and the third connector housing 113 respectively have corresponding connector terminals in the right direction. It is housed in a protruding state. And the opening of each connector housing by each terminal insertion part is assembled | attached so that it may block | close with each connector fitting part.

  For example, in the third connector housing 113, as shown in FIG. 6, the opening of the third connector housing 113 by the third terminal insertion portion 113 a is connected to the third connector terminal 342, the intermediate support portion 312, and the third connector fitting portion. It is assembled so as to be closed at 213. In FIG. 6, the third connector housing 113 is connected with a connector 5 connected to an electric wire (not shown).

  Specifically, the terminal 342a of the third connector terminal 342 is in contact with the upper end portion 113b of the third terminal insertion portion 113a in the vertical direction. Further, the terminal 342b of the third connector terminal 342 is in contact with the upper end of the support portion 213b of the third connector fitting portion 213 in the vertical direction.

  Further, the intermediate support portion 312 of the bus bar circuit body 300 is assembled together with the third connector terminal 342 so that the third end insertion portion 113a and the support portion 213b are sandwiched. In addition, the bottom opening of the third connector housing 113 by the third terminal insertion portion 113a is assembled so as to be closed by the flat protrusion 213a of the third connector fitting portion 213.

Further, the flat portion 214 of the right closing portion 215 is assembled so as to contact the bottom surface of the third connector housing 113.
In this manner, the opening of the third connector housing 113 by the third terminal insertion portion 113a is assembled so as to be closed by the third connector terminal 342, the intermediate support portion 312 and the third connector fitting portion 213.

Similarly, the opening of the first connector housing 111 by the first terminal insertion portion 111 a is assembled so as to be closed by the first connector terminal 341 and the first connector fitting portion 211.
Further, the opening of the second connector housing 112 by the second terminal insertion portion 112 a is assembled so as to be closed by the second connector terminal 341 and the second connector fitting portion 212.

Further, the opening of the fourth connector housing 131 by the fourth terminal insertion portion is assembled so as to be closed by the fourth connector terminal 345, the intermediate support portion, and the fourth connector fitting portion 231.
Furthermore, each opening of the second fuse housing 121 by each fuse terminal insertion portion is assembled so as to be closed by the second fuse terminal 344, the intermediate support portion 313, and the second fuse fitting portion 222, respectively.

  As described above, the upper case 100 and the lower case 200 are assembled in the vertical direction with the bus bar circuit body 300 interposed therebetween, and at the same time, each connector terminal or fuse terminal is accommodated in the corresponding housing, thereby providing electrical connection. The box 1 can reduce the number of parts without impairing dust intrusion and without impairing assembly workability.

  Specifically, since the first connector housing 111, the second connector housing 112, the third connector housing 113, and the fourth connector housing 131 are integrally formed in the upper case 100, there are fixed parts for fixing each connector housing. It becomes unnecessary, and by reducing the number of parts of the electrical junction box 1, the electrical junction box 1 can be reduced in weight and assembly man-hours can be reduced. Thereby, the electrical junction box 1 can aim at cost reduction.

  Further, the electrical junction box 1 can be assembled in the vertical direction so that the upper case 100 and the lower case 200 are overlapped with the bus bar circuit body 300 interposed therebetween. Then, the connector terminals (340, 341, 342, 345) protruding in the front direction or the left-right direction of the insulating plate 310 by the terminal insertion portions of the connector housings (111, 112, 113, 131) are connected to the upper case. 100 and the lower case 200 can be accommodated in each connector housing from the overlapping direction.

  In other words, the electrical junction box 1 is assembled with each connector housing (111, 112, 113, 131) integrally formed with the upper case 100 at the same time that the upper case 100 and the lower case 200 are assembled with the bus bar circuit body 300 interposed therebetween. Terminals (340, 341, 342, 345) can be accommodated. Thereby, the electrical junction box 1 can mount | assemble the bus-bar circuit body 300 which has a connector terminal efficiently.

  Further, the protruding direction (right direction) of the first connector terminal 340, the second connector terminal 341, and the third connector terminal 342, the protruding direction (left direction) of the fourth connector terminal 345, and the protruding direction of the second fuse terminal 344. Even if the directions (forward directions) are different from each other, the electrical junction box 1 can accommodate each connector terminal or the second fuse terminal 344 in each connector housing at the same time that the upper case 100 and the lower case 200 are assembled. Can do.

  Furthermore, since the upper case 100 and the lower case 200 are assembled with the bus bar circuit body 300 interposed therebetween, the respective terminal insertion portions of the upper case 100 are closed by the respective closed portions of the lower case 200. Terminal exposure can be suppressed. Thereby, it can suppress that dust etc. penetrate | invade into the base of each connector terminal. Furthermore, it can suppress that dust etc. penetrate | invade into the inside of the electrical-connection box 1 from the base part of each connector terminal.

  Therefore, the electrical connection box 1 can reduce the number of parts without reducing the intrusion of dust and without impairing the assembly workability.

  Further, since the right closing portion 215 of the lower case 200 is constituted by the first connector fitting portion 211, the second connector fitting portion 212, and the plane portion 214, the first terminal insertion portion 111a and the support portion 211b are the first. Since the base portion of the first connector terminal 340 is sandwiched and supported, and the base portion of the second connector terminal 341 is sandwiched and supported by the second terminal insertion portion 112a and the support portion 212b, the electrical connection box 1 includes the first connector housing 111, In addition, the first connector terminal 340 and the second connector terminal 341 can be reliably supported in the second connector housing 112. Thereby, a deformation | transformation of each connector terminal at the time of removal | desorption of the connector 5 can be suppressed.

  Moreover, since each fitting part fits to each terminal insertion part, the twist of each connector housing at the time of the removal | desorption of the connector 5 can be suppressed. Furthermore, each flat surface portion of the lower case 200 can support each connector housing from below, so that each connector housing can be deformed against a load in the overlapping direction that is easily applied to each connector housing when the connector 5 is attached or detached. Can be suppressed.

  Therefore, the electrical connection box 1 can more reliably suppress the intrusion of dust and also suppress the deformation of the connector housing.

  In addition, by forming each fitting portion to have a dimension approximately the same as the length and width of the connector terminal in plan view, the gap between each connector housing opening and each connector terminal by each terminal insertion portion in plan view. Can be minimized. Thereby, since the aperture ratio by each terminal insertion part in each connector housing can be made small, the deformation | transformation of each connector housing at the time of attachment or detachment of the connector 5 can be suppressed more.

  Further, in the second connector housing 112 that accommodates the second connector terminals 341 composed of a plurality of terminals, the same number of second terminal insertion portions 112a as the number of terminals of the second connector terminals 341 can be provided as slit-shaped openings. . That is, the aperture ratio of the second connector housing 112 by the third terminal insertion portion 112a can be made smaller than when a plurality of connector terminals are allowed to be inserted by one terminal insertion portion. Thereby, the deformation | transformation of the 2nd connector housing 112 at the time of removal | desorption of the connector 5 can be suppressed more. The same effect can be obtained in the third connector housing 113 and the fourth connector housing 131.

  In addition, by forming each fitting portion of the lower case 200 in a substantially L-shaped vertical cross-sectional shape, the electrical junction box 1 has a complicated intrusion path such as dust from the outside of each connector housing to the base of each connector terminal. Can be.

  For example, as shown in FIG. 6, dust or the like that has entered the left direction in the drawing from the gap between the bottom surface of the third connector housing 113 and the flat portion 214 of the lower case 200 is the third terminal insertion portion of the third connector housing 113. It penetrates into the third connector housing 113 through the gap between the 113a and the flat projection 213a. Then, it passes through the gap between the upper surface of the planar protrusion 213 a and the connector 5 and reaches the base of the third connector terminal 342 through the gap between the support portion 213 b and the connector 5.

  Thus, since the step can be formed by the third terminal insertion portion 113a, the flat projection 213a, and the like with respect to the intrusion direction of dust and the like, the distance of the intrusion path of dust and the like can be made longer than the linear distance. Thereby, the electrical junction box 1 can suppress more reliably that dust reaches | attains the base part of the 3rd connector terminal 342. FIG. That is, it is possible to prevent dust and the like from entering the inside of the electrical connection box 1 and prevent a short circuit or poor contact due to dust or the like. The same effect can be obtained in the first connector housing 111, the second connector housing 112, and the fourth connector housing 131.

  Therefore, the electrical junction box 1 can more reliably suppress the intrusion of dust and also can suppress deformation of each connector housing.

  In addition, by providing the bus bar circuit body 300 with the intermediate support portion 312, even the third connector terminal 342 having the terminals arranged in the vertical direction can be supported between the terminals by the intermediate support portion 312. The intermediate support portion 312 can sandwich the base portion of the third connector terminal 342 together with the third connector housing 113 and the support portion 213b. That is, the electrical junction box 1 can reliably support the base portion of the third connector terminal 342.

  Furthermore, even with the third connector terminal 342 in which a plurality of terminals are arranged in the vertical direction, the electrical junction box 1 can reduce the gap at the base portion of the third connector terminal 342. The same effect can be obtained also in the intermediate support portion corresponding to the fourth connector terminal 345.

  Therefore, even if it is a connector terminal in which a plurality of terminals are arranged in the vertical direction, the electrical junction box 1 can more reliably suppress the intrusion of dust.

  In addition, while being integrally formed with the upper case 100, each terminal insertion portion of each connector housing that accommodates each connector terminal is allowed to pass through each connector terminal from below the upper case 100, and each lower case 200 is closed. A method for assembling the electrical junction box 1 that can reduce the number of parts without compromising the assembling workability while preventing the intrusion of dust by fitting the parts from below and closing each terminal insertion part. Can be provided.

  The same effect as that of the connector housing described above can also be obtained in the fuse terminal insertion portion of the second fuse housing 121 that houses the second fuse terminal 344 and the front closing portion 221.

  In the above-described embodiment, the bus bar circuit body 300 is accommodated in the electrical connection box 1. However, the present invention is not limited thereto, and a configuration in which a printed wiring board having connector terminals or the like is accommodated in the electrical connection box 1 may be used.

  Further, the bus bar circuit body 300 is assembled from the lower side of the upper case 100. However, after the bus bar circuit body 300 is assembled to the lower case 200 from above, the upper case 100 may be assembled from above the lower case 200.

  Further, although each connector housing is integrally formed in the upper case 100, a connector housing (fuse housing) may be integrally formed in the lower case 200, and a corresponding closed portion may be formed in the upper case 100.

  Alternatively, the upper case 100 may be integrally formed with a closing portion corresponding to the connector housing and the fuse housing, and the lower case 200 may be integrally formed with the closing portion corresponding to the connector housing and the fuse housing.

  Further, although the upper case 100 and the lower case 200 are assembled by fitting, they may be screwed together with screws or the like. In addition, the bus bar circuit body 300 may be screwed with a screw or the like.

In correspondence between the configuration of the present invention and the above-described embodiment,
The electric circuit body of the present invention corresponds to the bus bar circuit body 300 of the embodiment,
Similarly,
The connection terminal portion corresponds to the first connector terminal 340, the second connector terminal 341, the third connector terminal 342, the fourth connector terminal 345, and the second fuse terminal 344,
The first case corresponds to the upper case 100,
The second case corresponds to the lower case 200,
The connector housing corresponds to the first connector housing 111, the second connector housing 112, the third connector housing 113, the fourth connector housing 131, and the second fuse housing 121,
The terminal insertion part corresponds to the first terminal insertion part 111a, the second terminal insertion part 112a, the third terminal insertion part 113a, the fourth terminal insertion part, and the fuse terminal insertion part,
The occlusion part corresponds to the right occlusion part 215, the front occlusion part 221, and the left occlusion part 231.
The fitting portions correspond to the first connector fitting portion 211, the second connector fitting portion 212, the third connector fitting portion 213, the fourth connector fitting portion 232, and the second fuse fitting portion 222,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  The present invention can be used not only for ECUs and junction boxes mounted on automobiles but also for electrical junction boxes used in various fields.

DESCRIPTION OF SYMBOLS 1 ... Electrical junction box 100 ... Upper case 111 ... 1st connector housing 111a ... 1st terminal insertion part 112a ... 2nd terminal insertion part 113a ... 3rd terminal insertion part 112 ... 2nd connector housing 113 ... 3rd connector housing 121 ... Second fuse housing 131 ... Fourth connector housing 200 ... Lower case 211 ... First connector fitting portion 212 ... Second connector fitting portion 213 ... Third connector fitting portions 211a, 212a, 213a ... Planar protrusions 211b, 212b, 213b ... supporting part 215 ... right closing part 221 ... front closing part 222 ... second fuse fitting part 231 ... left closing part 232 ... fourth connector fitting part 214, 221a, 231a ... planar part 300 ... bus bar circuit body 310 ... Insulating plates 312, 313 ... intermediate support 340 ... first connector terminal 341 ... second connector Child 342 ... third connector terminal 344 ... second fuse terminal 345 ... fourth connector terminal

Claims (5)

An electric circuit body having an electric circuit pattern on a plate surface of a substantially plate-like insulating plate having an insulating property, and having at least one connection terminal portion protruding laterally in an in-plane direction of the insulating plate;
A first case covering the electric circuit body from one plate surface side of the insulating plate;
A second case covering the electric circuit body from the other plate surface side of the insulating plate,
An electrical junction box assembled so as to overlap the first case and the second case with the electrical circuit body sandwiched in a direction substantially perpendicular to the insulating plate;
In the first case,
While having an opening in the protruding direction of the connection terminal portion, and integrally forming a housing for housing the connection terminal portion,
In the housing,
Forming a terminal insertion portion that allows insertion of the connection terminal portion from the overlapping direction of the first case and the second case;
In the second case,
An electrical junction box including a closing portion that closes the terminal insertion portion by fitting from the overlapping direction. The blocking portion of the second case;
A fitting portion formed in a substantially L-shaped vertical cross-sectional shape that fits into the terminal insertion portion in a protruding direction of the connection terminal portion and a cross-section in a direction substantially perpendicular to the insulating plate, and opposed to the housing It consists of a substantially flat plane part that
The fitting portion,
A flat protrusion that extends in the protruding direction of the connection terminal portion on the flat surface and protrudes toward the housing, and stands from the base side end in the protruding direction of the flat protrusion toward the housing. The electrical connection box according to claim 1, wherein the substantially L-shaped vertical cross-sectional shape is formed by a support portion that sandwiches and supports the base portion of the connection terminal portion with the terminal insertion portion. The blocking part of the second case is
The electrical junction box according to claim 1, wherein the electrical connection box is formed in a dimension substantially equal to a dimension in a short direction and a longitudinal direction of the connection terminal portion in a viewpoint direction along the overlapping direction. The electric circuit body;
A configuration in which a plurality of the connection terminal portions are arranged with a predetermined interval in the overlapping direction,
Between the connection terminal portions in the overlapping direction,
The electrical connection box according to any one of claims 1 to 3, further comprising an intermediate support portion that sandwiches and supports the base portion of the connection terminal portion together with the housing and the closing portion. An electric circuit body having an electric circuit pattern on a plate surface of a substantially plate-like insulating plate having an insulating property, and having at least one connection terminal portion protruding laterally in an in-plane direction of the insulating plate, and the insulation A first case that covers the electric circuit body from one plate surface side of the plate, and a second case that covers the electric circuit body from the other plate surface side of the insulating plate, and is substantially perpendicular to the insulating plate A method of assembling an electric junction box for assembling the first case and the second case with the electric circuit body sandwiched in any direction,
The first case is integrally formed with an opening in the protruding direction of the connection terminal portion, and the first case and the second case are overlapped by a terminal insertion portion of a housing that houses the connection terminal portion. Allow insertion of the connection terminal part from the direction,
A method for assembling an electric junction box that is fitted from the overlapping direction by the closing portion of the second case and closes the terminal insertion portion.

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