JP5979181B2 - Electrical junction box and connector housing - Google Patents

Description

  The present invention relates to an electrical junction box and a connector housing.

  2. Description of the Related Art Conventionally, an electrical junction box is known in which a substrate having a conductive path formed on an insulating plate is accommodated in a case. In Patent Document 1, a printed circuit board having a circuit pattern printed on an insulating plate is accommodated in a case, and a first attachment portion and a second attachment portion are extended from the connector block to the case side. The first mounting portion is fixed to the upper cover of the case with screws, and the second mounting portion is fixed to the printed circuit board with screws.

JP2013-5433A

  By the way, when fixing a printed circuit board with a screw, since the area | region of the printed circuit board near a screw receives strong force in the case of screwing, a circuit pattern cannot be formed. If there is a portion in which the circuit pattern cannot be formed in this way, there is a problem that the circuit pattern cannot be efficiently wired to the printed board and becomes an obstacle to downsizing of the printed board.

  The present invention has been completed on the basis of the above-described circumstances, and an object thereof is to increase a region where a conductive path of a circuit board can be formed.

The electrical junction box of the present invention has a circuit board having a conductive path formed on an insulating plate, a hood-like hood portion, and a back wall that closes the hood portion, and a terminal insertion hole is formed in the back wall. A connector housing, a connector terminal that is inserted into the terminal insertion hole from the back side of the connector housing, penetrates the back wall, and protrudes into the hood portion; and the connector housing is fixed and is different from the circuit board A base member, and a fixing portion that passes through a portion of the connector housing in a state where the connector terminal is inserted through the terminal insertion hole, and is fixed to the base member. A locking portion is provided for locking to the circuit board while being fixed to the base member.
A connector housing according to the present invention is a connector housing that is mounted on a base member, and has a hood-shaped hood portion and a back portion in which the hood portion is closed and a terminal insertion hole is formed through which a connector terminal can be inserted from the back side. A circuit in which a conductive path is formed on an insulating plate in a state where a fixed part is fixed to the base member by a wall, a fixed part passes through the fixed part, and the fixed part is fixed to the base member by the fixed part And a locking portion that locks to the substrate.

  According to the above configuration, when the connector housing is fixed to the base member at the fixing portion, the portion where the locking portion locks the circuit board is not fixed by the fixing portion. Since a strong force is not applied to the circuit board, the conductive path can be formed in the vicinity of the portion where the locking portion of the circuit board is locked. Therefore, it is possible to increase the area where the conductive path of the circuit board can be formed. In addition, since the number of fixing portions can be reduced, the number of fixing portions can be reduced.

The following aspects are preferred as embodiments of the present invention.
-The said fixing | fixed part is a screw | thread.
The base member includes a holding portion that holds the position of the portion of the circuit board on the connector housing side.
If it does in this way, the position of the part by the side of the connector housing in a circuit board can be held.

A position holding hole is formed in the circuit board, and the holding portion includes a protrusion inserted through the position holding hole.
If it does in this way, the position in the plane of a circuit board can be held with simple composition.

-The said latching | locking part is provided with a pair of clamping part which clamps the said circuit board from both sides.
If it does in this way, a pair of clamping part can hold | maintain the position of a circuit board about the direction orthogonal to the board surface of a circuit board by pinching a circuit board.

The base member includes a guide portion that guides the connector housing when the connector housing is assembled, the connector housing includes a receiving portion that receives and guides the guide portion, and the locking portion is , Provided in the receiving portion.
If it does in this way, a latching | locking part can be formed using the structure of the receiving part for guiding a connector housing.

The circuit board is formed with a notch with a corner notched, and the receiving part enters the notch.

  According to the present invention, it is possible to increase a region where a conductive path of a circuit board can be formed.

The perspective view which shows the electrical-connection box of Embodiment 1. Front view showing the electrical junction box A side view of an electrical junction box showing the front of the AA line in a longitudinal sectional view The top view which expands and shows the part where the connector housing is installed The figure shown with sectional drawing and the front view seen from the BB line of FIG. The perspective view which shows a mode that a connector housing is mounted | worn to a base member The perspective view which shows a mode that a connector housing is mounted to a base member from the direction different from FIG. The perspective view which shows a mode that the connector housing is screwed to a base member The perspective view which shows a mode that the connector housing is screwed to a base member from the direction different from FIG. The figure which shows sectional drawing and the front view seen from the position equivalent to the BB line of FIG. 4 about Embodiment 2.

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
The electrical junction box 10 is arranged in a power supply path between a power source such as a battery of a vehicle such as an electric vehicle or a hybrid vehicle and a load including an in-vehicle electrical component such as a lamp or a drive motor, for example, a DC-DC converter. It can be used for inverters and the like. In the following description, the vertical direction is described with reference to the direction of FIG. 2, and the front-back direction is described with the left side of FIG. 3 as the front and the right side as the rear.

(Electric junction box 10)
As shown in FIG. 2, the electrical junction box 10 includes a heat radiating member 11, a base member 15 made of synthetic resin placed on the upper surface of the heat radiating member 11, and two circuits fixed to the base member 15. Boards 34 and 35, a connector housing 40 mounted on the base member 15, and a shield cover 54 are provided.

The heat radiating member 11 is made of a metal material having high thermal conductivity such as an aluminum alloy or a copper alloy, the upper surface side is flat, and a large number of heat radiating fins 12 are arranged side by side on the lower surface side. A screw hole 13 is formed on the outer periphery of the heat dissipation member 11.
The shield cover 54 is formed by punching and bending a plate-like metal made of aluminum or the like, and has a through piece (not shown) passed through the cover passage portion 22 of the base member 15 at the lower edge portion. ) And a screw 57 are formed. The screw 57 is passed through the hole 56 and screwed into the screw hole 13 of the heat radiating member 11 to be fixed to the heat radiating member 11, and the shield cover 54 is connected to the ground via the heat radiating member 11.

(Base member 15)
The base member 15 can be connected to the main body 16 formed in a frame shape along the peripheral edge of the heat radiating member 11 and the terminal portion of the electric wire disposed on the outside of the shield cover 54 and connected to the external power supply side (not shown). And an attachment portion 29.
The attachment portion 29 accommodates positive and negative power supply side terminals 32 and partitions the power supply side terminals 32 from the outside, and includes a lid portion 31 that can be opened and closed by a hinge portion 30. The terminal of the electric wire terminal part connected to the external power supply is attached to the power supply side terminal 32. Power from an external power supply is supplied to the circuit boards 34 and 35 via the power supply side terminal 32.

  As shown in FIGS. 6 and 7, the main body 16 includes a connector mounting portion 17 to which the connector housing 40 is mounted. The connector mounting portion 17 is formed with a facing wall 18 standing in a band shape facing the back surface of the connector housing 40 and a height lower than the facing wall 18, and a pair of left and right pedestal portions 20 on which the connector housing 40 is placed. And a cover through portion 22 through which the through piece of the shield cover 54 is inserted.

  The opposing wall 18 supports the raised portion of the connector terminal 58 whose front surface 18A is bent in a crank shape from the rear. On the front surface 18 </ b> A, protrusions 47 for fitting the connector terminals 58 on both sides of the connector terminals 58 extend in the vertical direction. A guide portion 19 protrudes forward at an intermediate portion in the left-right direction of the upper end portion of the facing wall 18. The guide portion 19 is L-shaped and slightly protrudes upward from the upper end of the opposing wall 18 and protrudes forward in a plate shape with a constant width dimension.

  The upper surface of the pedestal portion 20 is a rectangular mounting surface 20A, and the front surface of the pedestal portion 20 is a front stop surface 20B that contacts the connector housing 40 when the connector housing 40 is mounted. A screw hole 21 for fixing the circuit board 35 and the heat radiating member 11 by screwing with a screw 60 (an example of a “fixing portion”) is formed on the mounting surface 20A. The cover through portion 22 is provided in front of and below the pedestal portion 20, and the through hole penetrates in the vertical direction.

  A control housing 61 is disposed at a position adjacent to the side of the connector mounting portion 17. The control housing 61 is opened in a rectangular tube shape into which the mating connector housing can be fitted, and is made of synthetic resin, and an L-shaped control terminal 62 passes through the back wall. The control housing 61 is fixed to the circuit board 35 with screws 36 and is fitted between the connector housing 40 and the end 15 </ b> A of the peripheral wall forming the outer periphery of the base member 15.

A cylindrical holding portion 26 protrudes upward at a position below one corner portion of the circuit board 35 on the connector housing 40 side of the base member 15. A cylindrical protrusion 27 whose outer diameter is reduced in a stepped shape is formed at the tip end (upper end) of the holding part 26, and this protrusion 27 is inserted into the position holding hole 38 of the circuit board 35. As a result, movement in the direction along the plate surface of the circuit board 35 is restricted. The lower surface of the circuit board 35 is placed on the stepped surface of the holding portion 26 where the outer diameter connected to the protrusion 27 is reduced.
Under the other three corners of the circuit board 35, the board support 23 is arranged. The board support 23 has an L-shaped fitting part 23A along the edge of the circuit board 35 at the upper end, and the corners of the circuit board 35 are fitted inside the fitting part 23A. Is positioned. The circuit board 35 is screwed and fixed to the board support base 23 with a plurality of screws 36 with the control housing 61 attached.

(Circuit boards 34, 35)
The circuit boards 34 and 35 are both rectangular, and a conductive path (not shown) made of a copper foil or the like is printed on an insulating plate made of an insulating material. As shown in FIG. Has been implemented. The electronic component 63 includes a switching element (for example, a relay such as a mechanical relay or a FET (Field Effect Transistor)).

  The circuit board 34 is fitted inside the main body 16 and fixed on the heat radiating member 11 with an insulating adhesive, and a bus bar 34B obtained by punching a metal plate material into the shape of a conductive path on the printed board 34A. It is configured by overlapping. An end of the bus bar 34B is bent at a right angle and stands up, and a connector terminal 58 bent at a right angle forward is integrally formed with the bus bar 34B. The circuit board 35 is not provided with a bus bar and is made of an insulating plate on which a conductive path pattern is printed.

  The circuit board 35 has a smaller area than the circuit board 34, and is arranged in parallel with the circuit board 35 at a predetermined interval above the circuit board 34. The circuit board 34 and the circuit board 35 are not electrically connected.

  As shown in FIGS. 6 and 7, the circuit board 35 is provided at a through hole 35 </ b> A through which a plurality of control terminals 62 fixed to the control housing 61 are passed and screwed, and a shaft portion of the screw 36 passes therethrough. A plurality of screw holes (not shown) and a single position holding hole 38 through which the protrusion 27 of the holding portion 26 is inserted are formed through. The position holding hole 38 has a perfect circle shape, and the protrusion 27 of the holding portion 26 passes therethrough. A portion of the circuit board 35 on the side of the connector housing 40 is formed with a notch 39 having a corner shape cut out in a rectangular shape. When the connector housing 40 is attached to the base member 15, an edge of a receiving portion 45 of the connector housing 40 described later enters the cutout portion 39.

(Connector housing 40)
The connector housing 40 is made of synthetic resin, and has a hood portion 41 (a shape that opens forward so as to cover a mating connector housing (not shown)), a back wall 42 that closes the hood portion 41, and a side wall from the side. A hook portion 44 that extends in the form of a hook, a receiving portion 45 that extends rearward and receives the guide portion 19 inside, and a portion through which a screw 60 passes, and is fixed by being screwed to the base portion 20. Part 51. The hood part 41 is formed in a rectangular tube shape.

  As shown in FIGS. 2 and 3, the back wall 42 is formed with a plurality of terminal insertion holes 43 through which the connector terminals 58 are inserted. The terminal insertion hole 43 is formed in such a size that a slight gap is formed between the terminal insertion hole 43 and the connector terminal 58. A pair of upper and lower protrusions 42 </ b> A protrudes on the rear side of the back surface of the back wall 42 that is continuous with the terminal insertion hole 43. The terminal insertion hole 43 has a rear end portion whose diameter is increased toward the rear side. When the connector terminal 58 is inserted into the terminal insertion hole 43, the diameter of the terminal insertion hole 43 is increased. Insertion is guided. As shown in FIGS. 6 and 7, the flange portion 44 is formed in the upper half of the outer periphery at the middle portion in the front-rear direction of the connector housing 40, and the left and right projecting dimensions are larger than the upper and lower projecting dimensions. Has been. When the flange portion 44 abuts against the front stop surface 20B of the pedestal portion 20, the connector housing 40 is brought into a normal position where it can be screwed. Note that the lower end portion and the lower protrusion 42A of the connector housing 40 also contact the connector terminal 58 and the base member 15 at regular positions.

  The receiving part 45 extends rearward from the upper part of the rear end part of the hood part 41 in a thick plate shape, and a groove part 46 into which the guide part 19 is slidably fitted is formed on the bottom side on the rear end side. Has been. A locking portion 48 that locks to the upper surface of the circuit board 35 protrudes laterally at the side edge of the rear end portion of the receiving portion 45. The locking portion 48 extends from a base end portion connected to the upper surface of the receiving portion 45 to a position higher than the upper surface of the receiving portion 45, and the connector housing 40 is in a normal position with respect to the connector terminal 58 as shown in FIG. 5. Until the edge of the receiving portion 45 and the base end portion of the locking portion 48 enter the notch 39, and the tip of the locking portion 48 extending in the horizontal direction is above the edge of the notch 39. Overlapping.

  On the back side of the back wall 42, plate-like extending portions 50 are extended laterally from both side edges of the receiving portion 45. The extending portion 50 extends sideways in a crank shape, and is formed so as to cover the connector terminal 58 that is integrally connected to the back surface of the back wall 42 and disposed on the inside thereof. Both ends of the extending portion 50 that are lowered in a stepped shape are a pair of left and right fixed portions 51 that are fixed by screwing. The fixed portion 51 is formed with a through hole 52 through which the shaft portion of the screw 60 is passed.

The assembly of the electrical junction box 10 will be described.
The base member 15 is attached to the upper surface of the heat radiating member 11 and the circuit board 34 is placed thereon. Further, when the circuit board 35 to which the control housing 61 is attached is placed at a predetermined position on the board support 23, the protrusion 27 of the holding part 26 is inserted into the position holding hole 38. Then, the circuit board 35 is screwed to the board support 23 with screws 36 (FIG. 6).

  Next, when the connector housing 40 is moved rearward from the back side, the receiving portion 45 of the connector housing 40 is guided by the guide portion 19, and the connector terminal 58 is inserted into the terminal insertion hole 43. When the connector housing 40 is further moved rearward, the connector housing 40 is disposed at a regular position where the screw 60 can be screwed. At this time, the locking portion 48 formed in the receiving portion 45 of the connector housing 40 overlaps the edge of the notch 39 of the circuit board 35 (the notch 39 side of the position holding hole 38). When the left and right fixed parts 51 of the connector housing 40 are screwed to the pedestal part 20 with screws 60 (FIG. 8), the connector housing 40 is pressed against the base member 15 by the force of screwing, and the connector housing Since the locking part 48 formed integrally with the circuit board 40 presses down the edge part of the notch part 39 of the circuit board 35, the connector housing 40 side of the circuit board 35 is not attached to the base member 15 without screwing. Position is fixed.

The operation and effect of this embodiment will be described.
According to the first embodiment, in the state where the connector housing 40 is fixed to the base member 15 with the screw 60 (fixed portion), the vicinity of the portion where the locking portion 48 locks the circuit board 35 is not screwed. Thus, since a strong force is not applied to the circuit board 35 at the time of screwing, a conductive path can be formed in the vicinity of the portion of the circuit board 35 where the locking portion 48 is locked. Therefore, it is possible to increase the region where the conductive path of the circuit board 35 can be formed. Further, since the number of places to be screwed is reduced, the number of screws can be reduced.

The base member 15 includes a holding portion 26 that holds the position of the portion of the circuit board 35 on the connector housing 40 side.
If it does in this way, about the connector housing 40 side in the circuit board 35,
The position in the plane of the circuit board 35 and the position on the lower side are locked by the holding portion 26, and the upper side of the circuit board 35 is locked by the locking portion 48, so that the portion of the circuit board 35 on the connector housing 40 side is The position can be maintained.

Furthermore, a position holding hole 38 is formed in the circuit board 35, and the holding portion 26 includes a protrusion 27 inserted through the position holding hole 38.
In this way, the position in the plane of the circuit board 35 can be held with a simple configuration.

The base member 15 includes a guide portion 19 that guides the connector housing 40 when the connector housing 40 is assembled. The connector housing 40 extends toward the circuit board 35 and receives and guides the guide portion 19. A locking portion 48 is provided on the receiving portion 45.
In this way, the locking portion 48 can be formed using the configuration of the receiving portion 45 extending toward the circuit board 35 in order to guide the connector housing 40.

Further, the circuit board 35 is formed with a cutout portion 39 with a corner cut out, and the receiving portion 45 enters the cutout portion 39.
In this way, even if the width of the circuit board 35 on the connector housing 40 side is increased, the circuit board 35 can be prevented from coming into contact with the receiving portion 45, so that the area of the circuit board 35 can be increased. .

<Embodiment 2>
A second embodiment will be described with reference to FIG. In the second embodiment, a locking portion 70 having a shape different from that of the locking portion 48 of the first embodiment is provided. Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 10, the locking part 70 includes a pair of upper and lower clamping parts 71 and 72 that are clamped from both sides of the circuit board 35. The pair of sandwiching portions 71 and 72 are both plate-shaped, and the upper sandwiching portion 71 is connected to the upper surface of the receiving portion 45 and extends in a horizontal direction at a slightly higher position and projects downwardly to a contact portion 71A. It has. The lower clamping part 72 extends horizontally downward with a predetermined gap with respect to the upper clamping part 71. The predetermined gap is set to a dimension that allows the pair of sandwiching portions 71 and 72 to be sandwiched while slightly applying force to the circuit board 35.
When the left and right fixed parts 51 of the connector housing 40 are screwed with screws 60, the connector housing 40 is pressed against the base member 15 side by the force of screwing, and the locking part 70 is formed on the notch 39 of the circuit board 35. In order to hold down the edge portion, the position of the circuit board 35 on the connector housing 40 side is fixed to the base member 15 without screwing.
In this way, the pair of holding portions 71 and 72 hold the circuit board 35 from both sides, so that the position of the circuit board 35 can be held in the direction orthogonal to the plate surface of the circuit board 35. Further, since both sides of the circuit board 35 can be held, it is not always necessary to provide the base member 15 with a configuration for holding the corners of the circuit board 35 from the lower side like the holding part 26 of the first embodiment. The configuration of the base member 15 can be simplified.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the locking portion 48 is provided in the receiving portion 45, a locking portion may be provided in addition to the receiving portion 45. For example, a locking portion that locks the circuit board 35 may be provided in a portion of the connector housing other than the receiving portion 45.
(2) The position holding hole 38 and the holding portion 26 may not be provided.

10: Electrical connection box 15: Base member 19: Guide part 20: Base part 26: Holding part 27: Projection part 34, 35: Circuit board 38: Position holding hole 39: Notch part 40: Connector housing 41: Hood part 42: Back wall 43: terminal insertion hole 45: receiving portion 48, 70: locking portion 50: extending portion 51: fixed portion 58: connector terminals 36, 57, 60: screws 71, 72: a pair of clamping portions

Claims (8)

A circuit board having a conductive path formed on an insulating plate;
A connector housing having a hood-shaped hood portion and a back wall for closing the hood portion, and a terminal insertion hole formed in the back wall;
A connector terminal that is inserted into the terminal insertion hole from the back side of the connector housing, penetrates the back wall, and protrudes into the hood portion;
The connector housing is fixed, and a base member different from the circuit board;
A fixing portion that passes through a portion of the connector housing in a state where the connector terminal is inserted into the terminal insertion hole and is fixed to the base member;
The said connector housing is an electrical junction box provided with the latching | locking part latched to the said circuit board in the state fixed to the said base member by the said fixing | fixed part. The electrical junction box according to claim 1, wherein the fixing portion is a screw. The electrical connection box according to claim 1, wherein the base member includes a holding portion that holds a position of a portion of the circuit board on the connector housing side. In the circuit board, a position holding hole is formed,
The electrical connection box according to claim 3, wherein the holding portion includes a protrusion that is inserted into the position holding hole. The electrical connection box according to any one of claims 1 to 4, wherein the locking part includes a pair of clamping parts that clamp the circuit board from both sides. The base member includes a guide portion that guides the connector housing when the connector housing is assembled, and the connector housing includes a receiving portion that receives and guides the guide portion,
The electrical connection box according to any one of claims 1 to 5, wherein the locking portion is provided in the receiving portion. The electrical connection box according to claim 6, wherein the circuit board is formed with a notch portion with a corner portion notched, and the receiving portion enters the notch portion. A connector housing attached to the base member,
A hood-shaped hood,
Closing the hood portion, a back wall formed with a terminal insertion hole through which a connector terminal can be inserted from the back side,
A fixed portion that is fixed to the base member through the fixing portion;
A connector housing comprising: an engaging portion that engages with a circuit board having a conductive path formed on an insulating plate in a state where the fixed portion is fixed to the base member by the fixing portion.

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