JP5691803B2 - Connector and electrical junction box - Google Patents

Description

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

  A connector portion having a housing that can be fitted to a mating connector, a terminal fitting that is disposed in the housing and has the other end led out from the back wall of the housing, and the other end of the terminal fitting. For example, a connector described in Patent Document 1 is known as a connector including a circuit board to which is connected.

JP 2011-19377 A

  When performing the operation of connecting the circuit board and the terminal metal fitting in a connector provided with the circuit board as described in Patent Document 1, a through hole of the circuit board is formed above the other end of the terminal metal fitting. It is arranged so that the circuit board is moved downward, the other end of the terminal fitting is inserted into the through hole of the circuit board, and then the terminal fitting is connected to the through hole of the circuit board by soldering or the like. It is common.

  However, when moving the circuit board downward from above the other end of the terminal fitting and inserting the terminal fitting into the through hole, move the circuit board downward with the position of the terminal fitting and the position of the through hole matched. Even if it is made, position shift may arise. If the terminal metal and the through hole are misaligned, a land formed on the circuit board may be damaged by the end of the terminal metal or the terminal metal may be deformed.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a connector and an electrical junction box that prevent damage to a circuit board and deformation of terminal fittings.

In order to solve the above-described problems, the present invention provides a housing that can be fitted to a mating connector, one end portion is disposed in the housing, and the other end portion is led out from the rear wall of the housing to the outside of the housing. And a circuit board having a through hole through which the other end of the terminal fitting is inserted and connected, and a connector on the outer surface of the rear wall of the housing . A trapezoidal protrusion having an end face disposed on one side of the circuit board in a state where the other end of the terminal fitting is inserted into the through hole at positions corresponding to both ends in the width direction of the circuit board. parts are protruded, the end face accepts the end of the circuit board of the inclined posture inclined at an angle that does not interfere with the terminal fitting, the circuit board, the scan from the inclined position Guide portion recessed the concave located two rotation guide for inserting the other end of the terminal fitting into Ruhoru has featured in being kicked set.

  Moreover, as what solves the said subject, this invention is an electrical junction box provided with a connector and the case which accommodates the said connector.

  In the present invention, the guide portion that receives the circuit board in an inclined posture inclined at an angle that does not interfere with the terminal fitting, and guides the circuit board to turn to a position where the other end portion of the terminal fitting is inserted into the through hole from the inclined posture. Are provided corresponding to both ends in the width direction of the circuit board. Therefore, in the present invention, after the circuit board aligned with the terminal fitting is arranged in an inclined posture and inserted into the guide portion, the circuit board is inclined when the circuit board received in the guide portion is rotated. To the position where the other end of the terminal fitting is inserted into the through hole. As a result, according to the present invention, it is possible to provide a connector that is unlikely to be displaced and prevents damage to the circuit board and deformation of the terminal fitting, and an electrical junction box including the connector.

The present invention may have the following configurations.
A holding protrusion that holds the circuit board together with the guide part may protrude from the outer surface of the inner wall of the housing.
With such a configuration, since the circuit board is held by the holding protrusion and the guide part to prevent the circuit board from being lifted, workability of the work of connecting the circuit board to the terminal fitting is improved.

An inclined surface that holds the circuit board in the inclined posture may be formed on the holding protrusion.
With such a configuration, even when the circuit board is in an inclined posture, the circuit board is easily positioned in the inclined posture because the holding protrusion and the guide portion hold the circuit board.

A positioning projection for positioning the circuit board is formed on the outer surface of the inner wall of the housing, while the circuit board receives a positioning projection capable of receiving the positioning projection at a position corresponding to the positioning projection. A part may be formed.
With such a configuration, since the circuit board is received by the guide portion in a positioned state, the position shift does not occur until the end of the rotation operation.

The holding protrusion may be provided at a position facing the guide part, and a fixing part for fixing the circuit board to the housing may be provided between the holding protrusions.
With such a configuration, it is possible to have a single fixing portion to be fixed to the housing, the number of parts for fixing can be reduced, and the time required for fixing work can also be shortened. In addition, the number of connector poles can be increased by providing one fixed portion.

  ADVANTAGE OF THE INVENTION According to this invention, the connector and electrical junction box which prevented the damage of a circuit board and the deformation | transformation of a terminal metal fitting can be provided.

The perspective view of the electrical junction box of Embodiment 1 Front view of electrical junction box AA sectional view of FIG. Bottom view of connector Front view of connector Rear view of connector (screws securing circuit board removed) Connector perspective view BB sectional view of FIG. CC sectional view of FIG. The perspective view of the connector part seen from the opening side (bottom side) The perspective view of the connector part seen from the back side Sectional drawing of the connector in the DD section of Drawing 6 when a circuit board is arranged in an inclination posture DD sectional view of FIG. Sectional drawing of the connector in the EE section of Drawing 6 when a circuit board is arranged in an inclination posture EE sectional view of FIG. Sectional drawing of the connector in the FF cross section of FIG. 6 when a circuit board is arranged in the inclination posture FF sectional view of FIG. 6 (state before fixing with screw member)

<Embodiment 1>
An embodiment in which the present invention is applied to an on-vehicle electrical junction box 10 will be described with reference to FIGS. The electrical junction box 10 according to the present embodiment is configured by housing a connector 20 in a case 11 made of synthetic resin. The electrical junction box 10 is mounted on a vehicle (not shown) and distributes power from a power source (not shown) to a load (not shown). In the following description, the upper side in FIG. 1 is the upper side, and the lower side is the lower side.

(Case 11)
As shown in FIG. 1, the case 11 has a substantially rectangular parallelepiped shape. As shown in FIG. 3, the case 11 has an opening 11 </ b> A below. Of the four side surfaces of the case 11, the two surfaces having the smaller areas (the left side surface in FIG. 2 is referred to as the “left side surface 12D” and the right side surface is referred to as the “right side surface 12C”). Are arranged at opposite positions, and on the outside thereof, as shown in FIG. 1, tongue pieces 13A that extend upward in a cantilever shape and can be elastically deformed are formed. The tongue piece 13A is formed with a lock protrusion 13B that protrudes outward in the thickness direction of the tongue piece 13A. The lock projection 13B engages with a lock receiving portion provided in a storage portion (not shown) that stores the electrical connection box 10, so that the electrical connection box 10 is positioned in the storage portion.

  Further, as shown in FIG. 3, guide grooves 14A for guiding the circuit board 30 into the case 11 are formed on the inner wall 12E (the inner wall 12E of the case 11) of the left side surface 12D and the right side surface 12C of the case 11, respectively. Yes. Although FIG. 3 shows the inner wall 12E on the right side 12C side, the same applies to the left side 12D.

  The guide groove 14 </ b> A is provided on the inner wall 12 </ b> E of the case 11 by forming two ribs 14 </ b> B and 14 </ b> C with a space slightly larger than the thickness of the circuit board 30. That is, the portion between the two ribs 14B and 14C functions as the guide groove 14A.

  On the inner wall 12E of the left side surface 12D and the right side surface 12C of the case 11, an erroneous insertion preventing projection 15 is formed so as to overlap the rib 14B on the front side surface 12A side of the case 11. The erroneous insertion preventing protrusion 15 has a function of preventing insertion of the circuit board 30 by abutting and restricting insertion when the circuit board 30 is inserted in the wrong direction.

  Of the four side surfaces of the case 11, projections 16 extending in the height direction are respectively formed on the two surfaces 12 </ b> A and 12 </ b> B having the larger area. One protrusion 16 is formed on the surface 12A (front surface 12A) on the side shown in FIG. 1, and two protrusions 16 are formed on the other surface 12B (back surface 12B).

  As shown in FIG. 1, two first locking holes 17 that are locked to the first locking protrusions 22 of the connector 20 are provided at the lower end of the front side surface 12 </ b> A of the case 11 with an interval between them. As shown in FIG. 3, two lower locking holes 18 that are locked to the second locking projections 23 of the connector 20 are provided at the lower end of the back side surface 12B of the case 11 with an interval between them. It has been.

  On the periphery of the first locking hole 17 and the periphery of the second locking hole 18, thick portions 17 </ b> A and 18 </ b> A that are formed thicker than other portions are provided. The thick portions 17A and 18A are provided in a U-shape in the peripheral edge portion of the first locking hole 17 and the peripheral edge portion of the second locking hole 18 except for the upper edge portion. The strength of the stop hole 17 and the second locking hole 18 is ensured.

(Connector 20)
As shown in FIGS. 1 and 3, the connector 20 is disposed in the opening 11 </ b> A of the case 11 so as to block the opening 11 </ b> A. As shown in FIGS. 4 to 7, the connector 20 includes a connector portion 20 </ b> A having a housing 21 made of a synthetic resin having an opening 21 </ b> A at the bottom so that a mating connector (not shown) can be fitted, and a terminal fitting 29. And a circuit board 30. A wire harness connected to a load is connected to the mating connector fitted into the opening 21 </ b> A of the housing 21. The connector portion 20A is formed by injecting a liquid synthetic resin material into a mold and then solidifying. As a molding method, a known method such as injection molding can be used.

  In the present embodiment, the electrical connection box 10 is illustrated in a posture with the connector 20 facing downward, but the electrical connection box 10 can be mounted on the vehicle in any posture as necessary. .

(Housing 21)
On the front side of the housing 21 (the side shown in FIG. 5), two first locking projections 22 projecting outward in the thickness direction of the housing 21 are formed with an interval therebetween. On the back side of the housing 21 (the side shown in FIG. 6), two second locking projections 23 projecting outward in the thickness direction of the housing 21 are formed with an interval.

  The first locking protrusion 22 is formed at a position corresponding to the first locking hole 17 of the case 11, and the second locking protrusion 23 is formed at a position corresponding to the second locking hole 18 of the case 11. ing. The first locking protrusion 22 and the first locking hole 17 and the second locking protrusion 23 and the second locking hole 18 are elastically engaged with each other, so that the connector 20 is attached to the case 11. It can be assembled together.

  As shown in FIG. 6, a screw portion (an example of a fixing portion) for screwing the circuit board 30 is formed on the outer surface 24 </ b> A of the back wall 24 of the housing 21 so as to protrude upward. The screw portion has a substantially rectangular parallelepiped shape, and a circular through hole (screw hole 25A) is formed at the center thereof.

  Further, two positioning protrusions 25B and 25C on the left side in FIG. 6 and one positioning protrusion 25B on the right side in FIG. 6 are arranged on the outer surface 24A of the rear wall 24 of the housing 21 with a screw part (screw hole 25A) interposed therebetween. Projectingly formed. Of the positioning protrusions 25B and 25C, the leftmost positioning protrusion 25B in FIG. 6 is a first positioning protrusion 25B, and the other positioning protrusion 25C is a second positioning protrusion 25C.

  As shown in FIG. 9, the first positioning protrusion 25 </ b> B has a shape that protrudes upward from the rear wall 24 of the housing 21 and then bends vertically toward the left side shown in FIG. 9. The first positioning projection 25B is inserted into a positioning hole 32 (an example of a positioning receiving portion) formed in the circuit board 30.

  As shown in FIG. 6, the second positioning protrusion 25 </ b> C has a shape protruding upward from the back wall 24 of the housing 21. 25 C of 2nd positioning protrusions are inserted in the notch part 33 (an example of a positioning receiving part) formed in the circuit board 30. FIG.

  In the present embodiment, as shown in FIG. 7, trapezoidal protrusions 26 having a trapezoidal shape in a side view correspond to both ends in the width direction of the circuit board 30 on the outer surface 24 </ b> A of the back wall 24 of the housing 21. And projecting. On the end surfaces of the two trapezoidal protrusions 26 on the side where the circuit board 30 is disposed, recesses 26A that are recessed so as to receive the ends of the circuit board 30 are formed.

  The concave portion 26A provided in the trapezoidal protrusion 26 receives the circuit board 30 in an inclined posture inclined at an angle that does not interfere with the terminal fitting 29, and the other end portion of the terminal fitting 29 from the inclined posture to the through hole 35. It has a function of guiding the rotation to a position where 29B is inserted (an example of a guide portion).

  Further, in the present embodiment, as shown in FIGS. 6 and 7, the holding protrusion 27 that holds the circuit board 30 together with the trapezoidal protrusion 26 is provided on the outer surface 24 </ b> A of the back wall 24 of the housing 21. And projecting upward corresponding to both end portions in the width direction. In the present embodiment, the surface of the holding projection 27 on the circuit board 30 side is an inclined surface 27A as shown in FIG. The inclined surface 27A of the holding protrusion 27 can hold the circuit board 30 arranged in an inclined posture inclined with respect to the outer surface 24A of the back wall 24 of the housing 21 in an inclined posture.

(Terminal fitting 29)
As shown in FIGS. 10 and 11, a plurality of terminal fittings 29 are arranged through the back wall 24 of the housing 21. The terminal fitting 29 is formed by pressing a metal plate material into a predetermined shape. One end portion 29 </ b> A of the terminal fitting 29 is arranged so as to be positioned in the housing 21 as shown in FIG. 10. One end portion 29 </ b> A of the terminal fitting 29 is electrically connected to a mating connector fitted in the housing 21.

  The other end portion 29B of the terminal fitting 29 is led out to the outside of the housing 21 (upward in FIG. 9) through the back wall 24, and then bent at a right angle toward the circuit board 30 side. It penetrates thirty through holes 35. The other end 29B of the terminal fitting 29 is electrically connected to a conductive path formed on the circuit board 30 by a known method such as soldering.

  As shown in FIG. 10, the terminal fittings 29 are arranged in two stages on the back wall 24 of the connector 20. Further, the terminal fittings 29 are arranged side by side in the direction from the left side to the right side in FIG.

(Circuit board 30)
As shown in FIG. 2, a circuit board 30 in which a conductive path (not shown) is formed by a printed wiring technique is accommodated in the case 11. The circuit board 30 has a generally rectangular shape. In the case 11, the circuit board 30 is arranged in a posture in which the plate surface is parallel to the wall surface of the back side surface 12 </ b> B of the case 11. An electronic component (not shown) is mounted on the conductive path formed on the front side surface of the circuit board 30 (the right side surface in FIG. 3).

  As shown in FIG. 6, the circuit board 30 is formed with a through hole 35 through which the other end 29 </ b> B of the terminal fitting 29 is inserted and connected at a position corresponding to the terminal fitting 29.

  The lower end portion of the circuit board 30 is fixed to the housing 21 by being screwed into a screw hole 25A of a screw portion provided on the outer side surface 24A of the back wall 24 of the housing 21 of the connector 20. One screw insertion hole 31 is formed at a substantially central portion of the lower end portion of the circuit board 30 so as to overlap the screw hole 25A and through which the screw 34 is inserted. At the lower end of the circuit board 30, one circular positioning hole 32 is formed on each side of the screw insertion hole 31 (two in total). Further, a notch 33 is formed next to the left positioning hole 32 in FIG. A first positioning projection 25B provided on the outer surface 24A of the back wall 24 of the housing 21 is inserted into the positioning hole 32, and a second positioning projection 25C is fitted into the notch 33.

(Assembly of electrical junction box 10)
When assembling the electrical junction box 10 of the present embodiment, first, the circuit board 30 is attached to the back wall 24 of the housing 21 of the connector 20.
The operation of attaching the circuit board 30 to the back wall 24 of the housing 21 and connecting it to the terminal fitting 29 is performed as follows. First, as shown in FIGS. 12, 14, and 16, the front side surface of the circuit board 30 is arranged on the side where the terminal fitting 29 is arranged (the right side in FIG. 12), and both end portions of the circuit board 30 are respectively disposed. It is inserted into a recess 26 </ b> A formed in the trapezoidal protrusion 26.

  When inserting into the recess 26A, the circuit board 30 is inclined (inclined) at an angle that does not interfere with the terminal fitting 29 (so as to form an acute angle with respect to the outer surface 24A of the back wall 24 of the housing 21). As shown in FIG. 14, a part of the second positioning projection 25 </ b> C provided on the outer surface 24 </ b> A of the back wall 24 of the housing 21 is fitted into the notch 33 of the circuit board 30. Then, the two positioning holes 32 of the circuit board 30 are arranged at positions corresponding to the two first positioning protrusions 25B provided on the outer surface 24A of the back wall 24 of the housing 21, and the screw insertion holes 31 are formed. It arrange | positions in the position corresponding to 25 A of screw holes, and the circuit board 30 is positioned with respect to the terminal metal fitting 29 (refer FIG. 16). In this embodiment, since the surface of the holding projection 27 on the circuit board 30 side is an inclined surface 27A, the inclined circuit board 30 can be held between the inclined surface 27A and the trapezoidal projection 26.

  Next, when the circuit board 30 is rotated in the direction of the arrow X shown in FIG. 12, the circuit board 30 is guided by the recess 26A and is inclined (the state shown in FIGS. 12, 14, and 16). To the through hole 35 to the position where the other end 29B of the terminal fitting 29 is inserted (state shown in FIGS. 13, 15 and 17). Then, the screw hole 25 </ b> A of the screw portion provided in the housing 21 overlaps the screw insertion hole 31 of the circuit board 30, and the first positioning protrusion 25 </ b> B of the housing 21 is positioned by the positioning hole 32 of the circuit board 30. The two positioning protrusions 25 </ b> C are positioned by being inserted into the notches 33 of the circuit board 30, and the lower end of the circuit board 30 is sandwiched between the holding protrusion 27 and the trapezoidal protrusion 26.

  Next, screws 34 are inserted into the screw insertion holes 31 of the circuit board 30, the circuit board 30 and the inner wall 24 of the housing 21 are fixed by screws, and the circuit board 30 and the terminal fitting 29 are connected by soldering or the like. . The connector 20 to which the circuit board 30 thus manufactured is attached is placed in the case 11, and the first engagement hole 17 and the second engagement hole 18 provided in the case 11 are provided in the housing 21. When the locking projection 22 and the second locking projection 23 are respectively locked, the assembly of the electrical junction box 10 of the present embodiment is completed.

(Operation and effect of this embodiment)
In the present embodiment, the circuit board 30 is received in an inclined posture inclined at an angle that does not interfere with the terminal fitting 29, and the other end portion 29 </ b> B of the terminal fitting 29 is inserted into the through hole 35 from the inclined posture. The trapezoidal protrusions 26 having recesses 26 </ b> A (guide portions) that rotate and guide to the opposite ends of the circuit board 30 in the width direction are provided. Therefore, in the present embodiment, when the circuit board 30 aligned with the terminal fitting 29 is arranged in an inclined posture and inserted into the recess 26A, the circuit board 30 received in the recess 26A is rotated. The board 30 is guided from a tilted position to a position where the other end portion 29B of the terminal fitting 29 is inserted into the through hole 35. As a result, according to the present embodiment, it is possible to provide the connector 20 that is unlikely to be displaced and prevents the circuit board 30 from being damaged and the terminal fitting 29 from being deformed, and the electrical connection box 10 including the connector 20.

  Further, according to the present embodiment, the holding projection 27 that holds the circuit board 30 together with the recess 26 </ b> A is formed on the outer surface 24 </ b> A of the back wall 24 of the housing 21 so that the circuit board 30 holds the holding projection. 27 and the concave portion 26 </ b> A (guide portion) so as to prevent lifting, the workability of the work of connecting the circuit board 30 to the terminal fitting 29 is improved.

  In particular, in the present embodiment, since the holding protrusion 27 is formed with an inclined surface 27A that holds the circuit board 30 in an inclined posture, even when the circuit board 30 takes an inclined posture, Since it is held by the recess 26A, it is easy to align the circuit board 30 in the inclined posture.

  Further, in the present embodiment, a first positioning protrusion 25B and a second positioning protrusion 25C for positioning the circuit board 30 are formed on the outer surface 24A of the back wall 24 of the housing 21, while the circuit board 30 has Is formed with a positioning hole 32 and a notch 33 that can receive the first positioning protrusion 25B and the second positioning protrusion 25C. As a result, according to the present embodiment, since the circuit board 30 is received in the recessed portion 26A in a positioned state, the position does not shift until the end of the rotation operation, and the workability is excellent.

  Further, according to the present embodiment, the holding protrusions 27 are provided at positions facing the recesses 26 </ b> A, respectively, and between the holding protrusions 27, the fixing portions (screw portions 25 </ b> A) that fix the circuit board 30 to the housing 21. ) Is provided, the fixing portion to be fixed to the housing 21 can be provided at one place, the number of parts for fixing can be reduced, and the time required for the fixing operation can be shortened. In addition, the number of connector poles can be increased by providing one fixed portion.

<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 above embodiment, the holding projection is provided on the outer surface of the back wall of the housing at a position facing the guide portion. However, the holding projection is provided at a position facing the guide portion. It may not be provided, and the structure without a holding protrusion may be sufficient.
(2) In the above embodiment, the holding projection having the inclined surface is shown, but the inclined surface may not be formed.
(3) In the above embodiment, three positioning portions are provided. However, the number of positioning portions may be one, two, four or more, or no positioning portions are provided. May be.
(4) In the above embodiment, one fixing part is shown, but two or more fixing parts may be used.

DESCRIPTION OF SYMBOLS 10 ... Electrical junction box 11 ... Case 20 ... Connector 20A ... Connector part 21 ... Housing 21A ... Opening 24 ... Back wall 24A ... (Outside wall) outer surface 25A ... Screw hole (fixed part)
25B ... 1st positioning protrusion (positioning protrusion)
25C ... 2nd positioning protrusion (positioning protrusion)
26 ... trapezoidal protrusion 26A ... concave portion (guide portion)
27 ... Holding projection 27A ... Inclined surface 29 ... Terminal fitting 29A ... One end 29B ... Other end 30 ... Circuit board 32 ... Positioning hole (positioning receiving portion)
33 ... Notch (positioning receiving part)
35 ... Through hole

Claims (6)

A housing that is open to be matable with a mating connector, a connector portion having one end portion disposed in the housing and the other end portion being led out from the back wall of the housing to the outside of the housing;
A circuit board formed with a through hole through which the other end of the terminal fitting is inserted and connected,
On the one side of the circuit board in a state where the other end of the terminal fitting is inserted into the through hole at a position corresponding to both ends in the width direction of the circuit board on the outer surface of the inner wall of the housing. A trapezoidal protrusion having an end face to be disposed is formed to protrude, and the end face receives an end of the circuit board in an inclined posture that does not interfere with the terminal metal fitting, and the circuit board, connector, wherein a guide portion recessed in a concave shape to the other end position twice dynamic guide for inserting the said terminal fitting into the through hole from the inclined position is kicked set. 2. The connector according to claim 1, wherein a holding protrusion that holds the circuit board together with the guide portion is formed to protrude from an outer surface of the inner wall of the housing. The connector according to claim 2, wherein the holding protrusion has an inclined surface that holds the circuit board in the inclined posture. The holding protrusion is provided at a position facing the guide part, and a fixing part for fixing the circuit board to the housing is provided between the holding protrusions. The connector according to claim 2 or claim 3 . A positioning projection for positioning the circuit board is formed on the outer surface of the inner wall of the housing, while the circuit board receives a positioning projection capable of receiving the positioning projection at a position corresponding to the positioning projection. The connector according to any one of claims 1 to 4, wherein a portion is formed. An electrical junction box comprising: the connector according to any one of claims 1 to 5; and a case for housing the connector.

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