JP4764176B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box.

2. Description of the Related Art Conventionally, as an electrical connection box that is mounted on a vehicle and controls power interruption of an on-vehicle electrical component, a plate-like circuit component is housed in a housing (see Patent Document 1).
JP 2003-164039 A

  By the way, as an electrical junction box, it consists of the 1st and 2nd member in which a housing is mutually assembled, for example, the 1st member fixes and holds one side edge side of a circuit composition object, and this 1st member and 2nd member It is conceivable that the other side edge side and both sides of the circuit structure are covered with the second member by assembling so as to be attached to each other. According to this configuration, it is only necessary to perform the fixing operation of the circuit structure only on the first member, so that the manufacturing efficiency can be improved.

  However, according to the above configuration, the first member and the second member are relatively displaced so as to swing with each other with the attached portion of both members as a fulcrum, and the other side edge side of the circuit structure fixed to the first member is There is a risk of collision with the inner surface of the second member.

  The present invention has been completed based on the above circumstances, and provides an electrical junction box capable of preventing relative displacement of the first member and the second member constituting the housing so as to swing with respect to each other. The purpose is to do.

As a means for achieving the above object, the invention of claim 1 is an electrical junction box in which a plate-like circuit component is housed in a housing, and the housing is one of the circuit components. A first member that fixes and holds a side edge side, and a second member that is assembled to the first member and covers the other side edge side and both side surfaces of the circuit component, the first member and the The assembly portion of the second member is formed with a plurality of fitting wall portions extending from the two members toward the other side, and the fitting wall portion holds the circuit component of the first member. A plurality of first member side fitting wall portions extending from the main body portion toward the second member, and a plurality of second member side fitting portions protruding from the inner surface of the side wall of the second member and extending toward the first member. A first member-side fitting wall portion, and the wall A member-side fitting wall portion is brought into sliding contact with each other by assembling the two members have been made.

  According to a second aspect of the present invention, in the first aspect, one of the first member and the second member is provided with an elastic lock piece, and the elastic lock piece and the counterpart member are mutually connected. A lock protrusion and a lock recess are formed to engage and hold the two members in an assembled state, and a guide slope that elastically deforms the elastic lock piece with the assembly of the two members is formed on the lock protrusion. It is formed.

According to a third aspect of the present invention, in the second aspect, the housing has a substantially rectangular parallelepiped shape, the elastic locking pieces are formed on two opposing surfaces of the housing, and the second member side fitting wall portion is The second locking member is formed so as to protrude from the inner surfaces of the two opposing surfaces on which the elastic locking pieces are formed to the first member, and the sliding surface of each fitting wall portion is It is characterized in that it is set on a plane substantially parallel to the two opposing faces of the housing.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the fitting wall portion provided on at least one member is configured in a shape that is combined vertically and horizontally. Features.

  The invention according to claim 5 is the one according to any one of claims 1 to 4, wherein one of the fitting walls of the first member and the second member is one of the other fitting walls. It is provided in the position which touches both sides.

  According to a sixth aspect of the present invention, the circuit structure includes the circuit board and a bus bar attached to the circuit board according to any one of the first to fifth aspects, and the bus bar is formed on the circuit board. An extension part extending side by side from a side edge, wherein the first member is a connector housing configured as a male connector through the extension part of the bus bar protruding from the circuit structure, The two members are cases in which the opening is closed by the connector housing.

<Invention of Claim 1>
According to the first aspect of the present invention, the first member and the second member are formed in the first member and the second member since the fitting wall portions extending toward each other are assembled in a state of sliding contact with each other. Since both the fitting wall portions support each other, it is possible to prevent the first member and the second member from being displaced relative to each other so as to swing around the assembled portion as a fulcrum.

<Invention of Claim 2>
According to the invention of claim 2, when the assembly operation of the first member and the second member is performed, the elastic lock piece is elastically deformed by the guide slope formed on the lock projection during the assembly operation. When the assembly operation further proceeds, the elastic lock piece is restored and deformed, and the lock protrusion and the lock recess formed on the elastic lock piece and the mating member are engaged with each other, whereby the first member and the second member are assembled. It is done.

<Invention of Claim 3>
In the case where elastic lock pieces are formed on two opposing surfaces of a substantially rectangular parallelepiped housing, the elastic lock pieces are bent and deformed so that the first member and the second member face the housing with the elastic lock pieces as fulcrums. There is concern about the rocking in the direction intersecting the two surfaces.

  In view of the above, in the invention of claim 3, the sliding contact surface of each fitting wall portion is set to a surface substantially parallel to the two opposing surfaces of the housing. As a result, the fitting wall portions come into contact with each other from the direction intersecting the two opposing surfaces of the housing, so that the first member and the second member swing in the direction intersecting the two opposing surfaces of the housing. Can be prevented.

<Invention of Claim 4>
According to invention of Claim 4, the member by the side in which the fitting wall part comprised by the shape combined vertically and horizontally was provided can be reinforced.

<Invention of Claim 5>
According to the invention of claim 5, since one of the fitting wall portions is provided at a position that is in sliding contact with both sides of the other fitting wall portion, the position is in sliding contact with only one side of the other fitting wall portion. Compared with the case where it is provided in, it can support a fitting wall part still more firmly. As a result, the swing displacement of the first member and the second member can be prevented more reliably.

<Invention of Claim 6>
According to the invention of claim 6, the first member can be used as a male connector. Thereby, compared with the case where the male connector is formed separately from the first member, the number of parts can be reduced.

  Further, when the mating connector is inserted / removed with respect to the male connector, a frictional force acts on the extension portion between the terminals of the mating connector and receives a large force. If an attempt is made to insert / remove the mating connector and the male connector against this force, a large force is applied to the connector housing and the case.

  According to the sixth aspect of the present invention, even when a large force is applied to the connector housing and the case as described above, it is possible to prevent the two members from being displaced relative to each other so as to oscillate with the assembly portion as a fulcrum.

  An embodiment in which the present invention is applied to an electric junction box 10 for a vehicle will be described with reference to FIGS. This device is connected between a power source (not shown) such as a battery and on-vehicle electrical components (not shown) such as a headlamp and a wiper, and performs on / off control of various on-vehicle electrical components. ing. The electrical junction box 10 is configured by housing a circuit component 12 in a housing 11 having a substantially flat rectangular parallelepiped shape. The housing 11 has an opening and a flat case 13 (corresponding to the second member according to the present invention), and a connector housing (closed to the first member according to the present invention) that closes the opening and includes a hood portion 14. Applicable) 15. The case 13 is filled with a filler 16 so as to fill the circuit component 12, and a cover 17 that covers the hood portion 14 is attached to the case 13. The electrical junction box 10 can be attached to the vehicle (not shown) in an arbitrary posture. For example, as shown in FIG. 1, the cover 17 can be attached to the vehicle with the posture directed downward.

(Case)
The case 13 is made of a synthetic resin and has a flat shape and opens downward. A stepped portion 20 is formed at the lower end of the case 13 so as to extend outward in the left-right direction in FIG. A lock claw 21 protruding outward is formed on the outer surface of the stepped portion 20, and the case 13 and the cover 17 are assembled by elastically engaging a lock claw receiving portion 22 of the cover 17 described later. It is supposed to be. The right end portion in FIG. 2 of the stepped portion 20 is formed to hang downward, and serves as a wire guide portion 23 for guiding a wire (not shown) when the cover 17 is assembled.

  As shown in FIG. 3, a slit 24 is formed outwardly from the opening edge of the case 13 at the lower end portions of the two side surfaces facing in the left-right direction in FIG. A plurality of elastic lock pieces 25 that can be bent and deformed are formed. The elastic lock piece 25 is provided with a lock recess 26 penetrating in the thickness direction of the elastic lock piece 25. By engaging with a lock projection 27 of the connector housing 15 described later, the case 13 and the connector The housing 15 can be assembled.

(cover)
The cover 17 is made of a synthetic resin, and has an opening on the upper side and a shape that covers the lower end of the case 13 from below. A lower edge portion of the cover 17 is formed to be inclined downward toward the right side in FIG. 2, and an electric wire outlet port through which an unillustrated electric wire is led out at the right end portion in FIG. 2 among the lower end portions of the cover 17. 28 is formed (see FIG. 1), and the electric wire is led out through a space between the case 13 and the electric wire guide portion 23. A lock claw receiving portion 22 that engages with the lock claw 21 of the case 13 described above is formed at the upper end portion of the cover 17, and the lock claw receiving portion 22 and the lock claw 21 are elastically engaged. Thus, the case 13 and the cover 17 are assembled.

(Connector housing)
The connector housing 15 is made of synthetic resin, and as shown in FIG. 6, a main body portion 30 having a substantially rectangular parallelepiped shape, and extending upward from the left and right end portions of the main body portion 30 in FIG. 12 and a pair of guide rails 31 for guiding the circuit component 12 when the connector housing 15 is assembled.

  On the outer surface of the end portion 30, a lock projection 27 that engages with a lock recess 26 provided in the elastic lock piece 25 is provided outwardly at a position corresponding to the elastic lock piece 25 of the case 13 described above. Has been. A guide slope 50 is formed on the upper surface side of the lock protrusion 27 so as to be inclined inward as it goes upward. When the connector housing 15 and the case 13 are assembled, the guide slope 50 and the elastic lock piece 25 are engaged, and the elastic lock piece 25 rides on the guide slope 50 and elastically deforms outward.

  As shown in FIG. 3, a plurality of hood portions 14 opening downward are formed on the lower surface of the main body portion 30, and can be fitted to a mating connector (not shown). An electric wire (not shown) is connected to the mating connector, and this electric wire is guided by the electric wire guide portion 23 of the case 13 and electrically connected between the electric wire guide portion 23 of the cover 17 and the electric wire outlet port 28. It is led out of the box 10. An insertion hole 34 is formed in the inner wall of the hood portion 14 so as to penetrate in an up-down direction through which an extension portion 33 of a bus bar 32 of the circuit structure 12 described later passes.

  A receiving plate portion 35 is formed on the upper surface side of the main body portion 30 and extends upward from the right edge of the insertion hole 34 in FIG. 4 and receives the extended portion 33 of the bus bar 32 from the right side in FIG. 4. As shown in FIG. 6, the receiving plate part 35 is formed over substantially the entire width in the left-right direction of the main body part 30 in FIG.

  On the upper surface of the main body portion 30, at positions near the left and right ends in FIG. 8, the region surrounded by the pair of slits 24 provided downward from the upper edge of the receiving plate portion 35 is directed upward. A pair of elastic engagement portions 36 extending is formed. The elastic engagement portion 36 is elastically deformable in the left-right direction in FIG. At the upper end portion of the elastic engagement portion 36, an engagement protrusion 37 is formed so as to protrude to the left in FIG. 7 and can be engaged with the engagement hole 38 of the circuit component 12. The elastic engagement portion 36 is bent and deformed on the back surface side, so that the engagement with the engagement hole 38 is released.

  A rib 43 that protrudes leftward and extends upward is formed from the left side surface of the receiving plate portion 35 in FIGS. 3 and 4. The rib 43 is formed between the adjacent insertion holes 34 and enters between the adjacent extending portions 33. The rib 43 is crushed from the left side in FIG. 4 by being heated and pressurized in a state where the extending portion 33 is inserted into the insertion hole 34, and is in close contact with the extending portion 33 and between the receiving plate portion 35 and the rib 43. By holding the extension part 33, the extension part 33 is prevented from coming off.

  The guide rail 31 is substantially U-shaped when viewed from above, and both left and right ends of the circuit component 12 are inserted into a space surrounded by the U-shape to guide the circuit component 12 in the vertical direction. It is possible.

  An inlet 18 for injecting the filler 16 into the case 13 is formed at the right end of the main body 30 in FIG. An injection tube portion 19 is formed in communication with the injection port 18. As shown in FIGS. 9 to 10, the filler 16 is injected into the case 13 with the injection port 18 facing upward, and the injection cylinder portion 19 is formed as shown in FIG. 10 extends downward, and the lower end edge of the injection tube portion 19 in FIG. 10 extends to the vicinity of the lower wall in FIG.

(Circuit structure)
As shown in FIG. 5, the circuit component 12 has an electronic component 40 mounted on a conductive path (not shown) formed by, for example, a printed wiring technique on the surface of a circuit board 39, and a plurality of bus bars 32 on the back surface. It is bonded through an insulating adhesive layer (not shown). An opening 41 is formed in the circuit board 39, and the bus bar 32 is exposed in the opening 41. An electronic component 40 is accommodated in the opening. A connection terminal (not shown) is provided on the surface of the electronic component 40 on the bus bar 32 side, and the connection terminal and the bus bar 32 are connected to each other. It is like that. In addition, a plurality of connection terminals 42 are formed on the lower surface side in FIG. 7 of the electronic component 40, extending downward and then bent substantially at right angles to the circuit board 39 side. As shown in FIG. 7, a part of the connection terminals 42 provided on each electronic component 40 is connected to the bus bar 32 exposed from the opening, and the other connection terminals 42 are conductive conductors formed on the surface of the circuit board 39. Connected to the road.

  As shown in FIG. 4, the bus bar 32 extends downward from the lower end edge of the circuit board 39 to form an extension portion 33. As shown in FIGS. 3 and 4, the lower portion of the extension portion 33 is inserted into an insertion hole 34 formed in the back wall of the hood portion 14 of the connector housing 15 and protrudes into the hood portion 14. It can be mated with the mating connector. The outer surface of the extending portion 33 is in contact with the insertion hole 34.

  As shown in FIGS. 6 and 8, both the circuit board 39 and the bus bar 32 are engaged with an elastic engagement portion 36 to be described later in a state where the circuit component 12 is held in a normal position with respect to the connector housing 15. An engagement hole (corresponding to the engagement portion according to the present invention) 38 is formed at a position corresponding to the mating protrusion 37. As shown in FIG. 7, the engagement protrusions 37 are engaged with the engagement holes 38, so that the circuit component 12 is prevented from coming off upward in FIG. The circuit board 39 is fixed to the connector housing 15 by engaging with an elastic engagement portion 36 formed integrally with the connector housing 15.

  As shown in FIG. 5, an engagement recess 44 is formed in a surface of the extension 33 that is close to the circuit board 39, on the surfaces of the extension 33 that are adjacent to each other. As shown in FIG. 6, when the rib 43 is crushed, the rib 43 bulges into the engagement recess 44, and the rib 43 and the engagement recess 44 engage to prevent the extension 33 from coming off. It is supposed to be.

  As shown in FIGS. 3 and 4, the case 13 is filled with a filler 16 that fills the entire circuit board 39 while leaving the extending portion 33. The circuit board 12 is waterproofed by filling the entire circuit board 39 with the filler 16. As shown in FIG. 10, the filler 16 is filled in the case 13 with the case 13 facing down and the connector housing 15 facing up.

  As shown in FIG. 14, the inner surfaces of two surfaces of the side wall of the case 13 that face each other in the vertical direction in FIG. 14 have a plurality of portions extending substantially diagonally to the right side in FIG. (Seven in the figure) are formed, and the case 13 and the connector housing 15 are assembled while being in sliding contact with a connector housing side fitting wall 52 described later. Yes. 14 except for the case-side fitting wall 51 located at the upper right end in FIG. 14 and the case-side fitting wall 51 located at the upper left end in FIG. It is bent upward or downward. The slidable contact surface of the case-side fitting wall 51 includes a surface along the left-right direction in FIG. 14 (a surface parallel to two opposing surfaces of the case 13 on which the elastic lock pieces 25 are formed) and a surface along the vertical direction. It has become.

  On the other hand, as shown in FIG. 11, a plurality of connector-side fitting wall portions 52 that protrude upward (on the right front side in FIG. 11) are formed on the upper surface (surface on the right front side in FIG. 11) of the main body 30. Yes. The connector-side fitting wall portion 52 extends in the vertical direction in FIG. 11 and also extends in the left-right direction in FIG. 11, and also serves as a reinforcement of the main body portion 30. The connector-side fitting wall portion 52 can be slidably contacted with the case-side fitting wall portion 51 described above when the connector housing 15 is assembled to the case 13. The sliding contact surface of the connector-side fitting wall portion 52 is a surface along the left-right direction in FIG. 11 (a surface parallel to two opposing surfaces of the case 13 on which the elastic lock pieces 25 are formed) and a surface along the vertical direction. It has become.

  As shown in FIG. 14, in the process of assembling the case 13 and the connector housing 15, both the fitting wall portions 51 and 52 are disposed so as to extend toward each other.

  As shown in FIG. 16, when the case 13 and the connector housing 15 are assembled, the case-side fitting wall portion 51 and the connector-side fitting wall portion 52 are extended in the vertical direction in FIG. Are in contact with each other in the left-right direction in FIG. Further, as shown in FIG. 17, a portion of the case side fitting wall portion 51 that is bent in the left-right direction in FIG. 17 extends in the direction penetrating the paper surface in FIG. 17 of the connector side fitting wall portion 52. It is in contact with the installed one from the left-right direction in FIG.

  Further, in FIG. 16, the case side fitting wall portion 51 except for the one located at the upper right end and the one located at the upper left end is the connector side fitting wall from both sides in the left-right direction in FIG. It comes into sliding contact with the part 51.

  Then, the effect | action and effect of this embodiment are demonstrated. First, the circuit structure 12 is assembled to the connector housing 15. As shown in FIG. 12, both end edges of the circuit board 39 of the circuit component 12 are inserted into the guide rail 31 of the connector housing 15. As shown in FIG. 13, when the assembly process proceeds and the tip of the extension portion 33 reaches the receiving plate portion 35, the circuit component 12 is further moved while the extending portion 33 and the receiving plate portion 35 are in sliding contact. insert. Then, the extension portion 33 is inserted into the insertion hole 34 while being guided by the receiving plate portion 35. As the assembly proceeds, the elastic engagement portion 36 of the connector housing 15 comes into contact with the bus bar 32 and is elastically bent and deformed to the back side of the circuit board 39.

  As shown in FIG. 14, in a state where the circuit component 12 is assembled at the normal position with respect to the connector housing 15, the elastic engagement portion 36 is restored and deformed, and the engagement protrusion 37 of the elastic engagement portion 36 is a circuit. The structure 12 is engaged with the engagement hole 38 of the structure 12. At this time, since the extension portion 33 is in contact with the insertion hole 34, the extension portion 33 is supported by the inner wall surface of the insertion hole 34, so that the circuit component 12 is bent and deformed in a direction to escape from the elastic engagement portion 36. Can be prevented. As a result, the lower end edge of the circuit component 12 is fixed to the connector housing 15 by the elastic engagement portion 36 formed integrally with the connector housing 15.

  Subsequently, the ribs 43 are heated and melted and crushed. Then, the rib 43 is in close contact with the extending portion 33. The extending portion 33 is sandwiched between the rib 43 and the receiving plate portion 35. Furthermore, the rib 43 comes into contact with and engages by expanding into an engagement recess 44 formed in the extension portion 33. Thereby, the bus bar 32 is fixed to the connector housing 15.

  Thereafter, the connector housing 15 assembled with the circuit structure 12 is accommodated in the case 13 as shown in FIG. In the middle of the housing operation, the case-side fitting wall 51 and the connector-side fitting wall 52 begin to slidably contact each other. When the housing operation further proceeds, the guide slope 50 formed on the lock projection 27 of the connector housing 15 and the elastic lock piece 25 of the case 13 come into contact with each other, and the elastic lock piece 25 is guided by the guide slope 50 and is removed. It bends elastically. When the housing operation further proceeds, the elastic six knitting 25 is restored and deformed, and the lock projection 27 is engaged with the lock recess 26 of the elastic lock piece 25, whereby the connector housing 15 and the case 13 are assembled. As a result, the left and right side edges and the upper edge of the circuit structure 12 are covered by the case 13.

  Since the elastic lock piece 25 can be bent and deformed, the connector housing 15 moves the elastic lock piece 25 in the direction intersecting the two opposing surfaces of the case 13 in which the elastic lock piece 25 is formed (left and right direction in FIG. 17). There is concern about swinging as a fulcrum.

  In view of the above points, in this embodiment, the case 13 and the connector housing 15 are each formed with a case-side fitting wall portion 51 and a connector-side fitting wall portion 52. In the state in which the case 13 and the connector housing 15 are assembled, as shown in FIG. 16, the case side fitting wall portion 51 and the connector side fitting wall portion 52 are extended in the vertical direction in FIG. The thing abuts on each other from the left-right direction in FIG. Further, as shown in FIG. 17, the portion of the case side fitting wall 51 that is bent in the left-right direction in FIG. 17 extends in the direction penetrating the paper surface in FIG. 17 of the connector side fitting wall 52. It is in contact with the installed one from the left-right direction in FIG. As a result, the case 13 or the connector housing 15 is displaced so as to swing with respect to the left-right direction in FIG. 17 and the left-right direction in FIG. 16 with the engaging portion of the elastic lock piece 25 and the lock projection 27 as a fulcrum. Can be prevented.

  Subsequently, a predetermined amount of the liquid filler 16 is injected from the injection port 18 of the connector housing 15 with the case 13 facing downward and the connector housing 15 facing upward to solidify.

  When the filler 16 is solidified, the mating connector is fitted into the hood portion 14. Thereafter, the cover 17 is assembled from the side of the connector housing 15 where the hood portion 14 is formed. Then, the lock claw 21 of the case 13 and the lock claw receiving portion 22 of the cover 17 come into contact with each other, and after the lock claw 21 is elastically deformed, the lock claw 21 is restored and deformed. By combining, the cover 17 and the connector housing 15 are assembled.

  As described above, according to the present embodiment, the case 13 is provided with the case-side fitting wall portion 51, and the connector housing 15 is provided with the connector-side fitting wall portion 52. In the process of assembling the case 13 and the connector housing 15, both the fitting wall portions 51 and 52 are arranged so as to extend toward each other, and the both fitting wall portions 51 and 52 are shown in FIG. The slidable contact is made from the left-right direction and from the left-right direction in FIG. As a result, in the state in which the case 13 and the connector housing 15 are assembled, the fitting wall portions 51 and 52 support each other, so that the case 13 and the connector housing 15 are connected to the elastic locking piece 25 and the locking protrusion. With the engaging portion of the portion 27 as a fulcrum, it is possible to prevent displacement in the left-right direction in FIG. 16 and the left-right direction in FIG.

  Further, since the case side fitting wall portion 51 is in contact with the connector side fitting wall portion 52 from both sides in the width direction except for those arranged at the right end and upper left portion in FIG. As compared with the case of contact, the swing displacement of the case 13 or the connector housing 15 can be prevented more reliably.

  Moreover, since the connector side fitting wall part 52 is formed extending in the vertical and horizontal directions (in the vertical direction and the horizontal direction in FIG. 11), the main body part 30 of the connector housing 15 can be reinforced.

  Moreover, by using the connector housing 15 as the first member assembled with the case 13, the number of parts can be reduced as compared with the case where the first member and the connector are formed separately.

  According to the present embodiment, even when a large force is applied to the connector housing 15 and the case 13 due to the insertion / removal of the mating connector, the two members are relatively pivoted so that the assembled portion is a fulcrum. Displacement can be prevented.

<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) In the present embodiment, the elastic lock piece 25 is provided on the case 13, but may be provided on the connector housing 15.

  (2) In the present embodiment, the lock recess 26 is provided in the elastic lock piece 25, but the lock protrusion 26 may be provided in the elastic lock piece 25.

  (3) In the present embodiment, the case side fitting wall portion 51 is configured to be in sliding contact with the connector housing side fitting wall portion 52 on both sides in FIG. 16, but is not limited thereto, and the connector housing side fitting wall portion 51 is not limited thereto. It may be provided at a position in sliding contact with only one side.

  (4) The extending portion 33 may be connected to an electronic component such as a fuse.

(5) A configuration in which the elastic lock piece 25 is formed on the side surface of the case 13 that faces in the left-right direction in FIG. 2 may be used as a reference example .

The perspective view of the electrical junction box concerning one embodiment of the present invention. Front view of electrical junction box AA line sectional view in FIG. BB sectional view in FIG. The perspective view which shows the circuit structure 12 Front view showing a state where the connector housing and the circuit structure are assembled. CC sectional view in FIG. Rear view showing the connector housing and circuit component assembled Side view showing the connector housing and case assembled EE sectional view in FIG. The perspective view which shows the state before attaching a connector housing and a circuit structure. The perspective view which shows the middle state of the assembly | attachment operation | work of a connector housing and a circuit structure The perspective view which shows the state which assembled | attached the connector housing and the circuit structure. The perspective view which shows the state before assembling a connector housing and a case Front view showing the connector housing and case assembled DD sectional view in FIG. Side sectional view showing the connector housing and case assembled

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electrical junction box 11 ... Housing 12 ... Circuit structure 13 ... Case (2nd member)
15 ... Connector housing (first member)
DESCRIPTION OF SYMBOLS 25 ... Elastic lock piece 26 ... Lock recessed part 27 ... Lock protrusion 32 ... Bus bar 33 ... Extension part 34 ... Insertion hole 39 ... Circuit board 50 ... Guide slope 51 ... Case side fitting wall part 52 ... Connector housing side fitting wall Part

Claims (6)

An electrical junction box having a plate-shaped circuit structure housed in a housing, wherein the housing fixes and holds one side edge of the circuit structure body, and the first member In what consists of a second member that is assembled and covers the other side edge side and both side surfaces of the circuit component,
In the assembly part of the first member and the second member, a plurality of fitting wall portions extending from the both members toward each other are formed.
The fitting wall portion includes a plurality of first member-side fitting wall portions extending from a main body portion that holds the circuit component of the first member toward the second member, and side walls of the second member . A plurality of second member side fitting wall portions protruding from the inner surface and extending toward the first member,
An electrical junction box in which the first member side fitting wall portion and the second member side fitting wall portion are brought into sliding contact with each other and the two members are assembled. One of the first member and the second member is provided with an elastic lock piece, and the elastic lock piece and the counterpart member engage with each other to hold the two members in the assembled state. The electrical connection box according to claim 1, wherein a guide slope is formed on the lock projection and the elastic lock piece is elastically deformed with the assembly of the two members. The housing has a substantially rectangular parallelepiped shape, and the elastic locking pieces are formed on two opposing surfaces of the housing,
The second member-side fitting wall portion is formed to protrude toward the first member from the inner surfaces of the two opposing surfaces on which the elastic locking pieces are formed in the side wall of the second member,
The electrical connection box according to claim 2, wherein the sliding contact surfaces of the respective fitting wall portions are set to a surface substantially parallel to two opposing surfaces of the housing. The electrical connection box according to any one of claims 1 to 3, wherein the fitting wall portion provided in at least one member is configured in a shape combined vertically and horizontally. 5. One of the fitting wall portions of the first member and the second member is provided at a position in sliding contact with both sides of the other fitting wall portion. Electrical junction box. The circuit structure includes a circuit board and a bus bar attached to the circuit board, the bus bar includes an extending portion extending side by side from a side edge of the circuit board, and the first member includes the circuit structure. 6. The connector housing configured as a male connector by penetrating the extending portion of the bus bar protruding from the body, wherein the second member is a case whose opening is closed by the connector housing. An electrical junction box according to any one of the above.

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