JP5851869B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box attached to an engine room or the like of an automobile.

  A wide variety of electronic devices are mounted on automobiles. In order to perform power supply and signal transmission to these various electronic devices, the automobile is configured by integrating electrical components such as connectors, relays, and fuses at appropriate locations between the power source and the electronic devices. An electrical junction box is arranged.

  FIG. 11 is a perspective view showing a relay and a cassette block constituting a conventional electrical junction box. FIG. 12 is an exploded perspective view showing the relay and cassette block shown in FIG. 13 is a cross-sectional view taken along line IV-IV in FIG.

  As shown in FIGS. 11 and 12, the conventional relay 102 includes a relay main body 121 and a plurality of relay terminals 126 protruding from the relay main body 121. A conventional counterpart terminal 103 is connected to the relay terminal 126. The conventional cassette block 104 shown in the figure includes a plurality of storage chambers 140 in which the relay terminals 126 and the counterpart terminals 103 are accommodated, and a plurality of lances 105 in which the counterpart terminals 103 are attached to the respective accommodation chambers 140. Is provided. An arrow Y in FIGS. 11 to 13 indicates a direction in which the relay terminal 126 is inserted into the accommodation chamber 140 of the cassette block 104. In FIG. 12, only one of the plurality of counterpart terminals 103 is shown, and the other counterpart terminals 103 are omitted.

  As shown in FIG. 12, the counterpart terminal 103 includes an electrical contact portion 131 connected to the relay terminal 126, and a wire connection portion 132 connected to the electrical contact portion 131 that is connected to the electrical contact portion 131. . The electrical contact portion 131 includes a plate-shaped substrate portion 133 and a pair of spring pieces 134 that are elastically contacted with the relay terminal 126. The pair of spring pieces 134 are erected from both edges in the width direction of the substrate portion 133, and are bent so that the tips approach the substrate portion 133.

  As shown in FIG. 13, the lance 105 is connected to the inner surface of the housing chamber 140 and extends upward in the direction of the arrow Y, and is provided at the free end of the arm 106. And a locking projection 107 for locking to the shoulder 134a. Further, the lance 105 is formed thin to facilitate bending.

  A procedure for assembling the conventional relay terminal 126, counterpart terminal 103, and cassette block 104 will be described. First, the electrical contact portion 131 side of the counterpart terminal 103 is brought close to the storage chamber 140, inserted into the storage chamber 140 from the lower opening in the figure along the arrow Y, and the spring piece 134 is locked to the lance 105, The counterpart terminal 103 is attached to each storage chamber 140. Next, each terminal 126 of the relay 102 is inserted into the accommodation chamber along the arrow Y from the upper opening in the figure, and is brought into elastic contact with each counterpart terminal 103. Assemble in this way (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 2002-354331 JP 2005-56799 A

  However, the electrical junction box 101 provided with the above-described conventional relay 102, counterpart terminal 103, and cassette block 104 has the following problems, that is, heat resistance that is difficult to deform and can withstand the high temperature environment in the engine room. In addition, it is necessary to use an expensive resin in order to form the lance 105 having mechanical strength that holds the counterpart terminal 103 in the housing chamber 140 even when the electric wire connected to the counterpart terminal 103 is pulled. There was a problem that the cost would be high. The relay terminal 126 is inserted between the inner surface of the accommodation chamber 140 and the spring piece 134 of the counterpart terminal 103 and is electrically connected to the counterpart terminal 103 by being elastically contacted with the spring piece 134. Therefore, there is a problem that the relay terminal 126 and the counterpart terminal 103 are separated from each other due to vibrations during traveling of the automobile, and the electrical connection between the relay terminal 126 and the counterpart terminal 103 may be disconnected. there were. Further, since it is necessary to increase the contact pressure between the relay terminal 126 and the counterpart terminal 103 in order to prevent the counterpart terminal 103 from falling off, the insertion force when the relay terminal 126 is inserted into each accommodation chamber 140 is increased. There was a problem.

  The present invention aims to solve the above problems. That is, an object of the present invention is to provide an electrical junction box that can reduce the cost by using an inexpensive resin.

The present invention according to claim 1 is an electrical component having a component main body, a plate-like terminal protruding from the component main body, a counterpart terminal connected to the terminal, the terminal connected to each other, and the counterpart A connection box main body for accommodating a terminal, wherein the terminal is provided with a first locking portion, and the counterpart terminal is locked with the first locking portion. A stop receiving portion is provided, and when the first locking receiving portion is locked to the first locking portion, the counterpart terminal is attached to the terminal, and the first locking portion is provided to the terminal. The counterpart terminal is provided inside the cylindrical portion, and the terminal inserted into the cylindrical portion is connected to one of the cylindrical portions. A spring piece biasing toward one wall, and the spring piece includes the one piece on the one wall. The first locking receiving portion projecting toward the first locking portion is provided, and the first locking receiving portion is locked to the first locking portion and the through hole provided in the one wall. An electrical junction box characterized by

  According to a second aspect of the present invention, in the first aspect of the present invention, the component main body is provided with a second locking portion, and the connection box main body is locked with the second locking portion. In this case, the electrical component is attached to the junction box body when the second latching portion is latched to the second latching receiving portion.

  According to a third aspect of the present invention, in the second aspect of the present invention, the connection box main body is provided with a peripheral wall surrounding the component main body, and the second locking portion of the component main body includes the second locking portion. A protrusion provided on the outer surface of the component main body, and the second locking receiving portion of the junction box main body is a recess provided in the inner surface of the peripheral wall or a through hole provided in the peripheral wall, Is characterized in that a pair of slits extending in the direction of insertion of the electrical component into the junction box body and notching the edge of the peripheral wall are provided on both sides of the recess or the through hole.

According to a fourth aspect of the present invention, in the first aspect of the present invention according to any one of the first to third aspects, the first locking portion is configured by a through hole provided in the terminal, and the counterpart A terminal is provided with a cylindrical portion into which the terminal is inserted, and a spring provided inside the cylindrical portion and biases the terminal inserted into the cylindrical portion toward one wall of the cylindrical portion. The cylindrical portion is provided with the first locking receiving portion that protrudes inwardly of the cylindrical portion and is locked to the first locking portion. Yes.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the first locking receiving portion is cut and raised from the one wall of the cylindrical portion and protrudes inward from the one wall. It is characterized by being formed.

According to this invention of Claim 1, the electrical component which has a component main body, the plate-shaped terminal protruded from the said component main body, the other party terminal connected to the said terminal, and the said terminal connected mutually And a junction box body in which the mating terminal is accommodated, wherein the terminal is provided with a first locking portion, and the mating terminal is latched to the first locking portion. A first locking receiving portion is provided, and the first locking receiving portion is locked to the first locking portion, whereby the counterpart terminal is attached to the terminal. By locking to one locking part, the counterpart terminal is held in the junction box body, so the conventional lance can be abolished and the material constituting the junction box body is changed to an inexpensive resin Therefore, the cost can be reduced. Further, even when the automobile vibrates while traveling, it is possible to ensure the reliability of electrical connection between the terminal of the electrical component and the counterpart terminal connected to the terminal. In addition, the contact pressure between the terminal and the counterpart terminal can be made lower than that of the conventional product, and the insertion force when inserting the terminal into each storage chamber can be reduced, thereby improving the assembly workability. Can do. Further, the first locking portion is a through hole provided in the terminal, and the counterpart terminal is provided inside the cylindrical portion into which the terminal is inserted, and the cylindrical shape. A spring piece for urging the terminal inserted into the wall portion toward one wall of the tubular portion, and the spring piece protrudes toward the one wall. Since the first locking receiving portion is locked to the first locking portion and the through hole provided in the one wall, the terminal is inserted into the cylindrical portion of the counterpart terminal. The other terminal can be attached to the terminal with an easy operation.

  According to this invention of Claim 2, the said 2nd latching | locking part is provided in the said component main body, and the 2nd latching receiving part latched to the said 2nd latching | locking part is provided in the said connection box main body. Since the electrical component is attached to the junction box body by being provided and the second latching portion is latched to the second latch receiving portion, it is ensured that the electrical component is dropped from the junction box body. Can be prevented.

  According to a third aspect of the present invention, the connection box main body is provided with a peripheral wall surrounding the component main body, and the second locking portion of the component main body is provided on the outer surface of the component main body. The second locking receiving portion of the junction box body is a recess provided in the inner surface of the peripheral wall or a through hole provided in the peripheral wall, and the peripheral wall includes the electric component. Since a pair of slits extending in the direction of insertion into the junction box body and notched at the edge of the peripheral wall are provided on both sides of the recess or the through hole, an easy operation of inserting electrical components into the junction box body This electrical component can be attached to the junction box body. Moreover, since the peripheral wall which surrounds a component main body is provided in the junction box main body, an electrical component can be attached to a junction box main body, without rattling.

According to this invention of Claim 4 , the said 1st latching | locking part is comprised by the through-hole provided in the said terminal, The said other party terminal is a cylindrical part in which the said terminal is inserted, The said cylinder A spring piece that is provided inside the tubular portion and biases the terminal inserted into the tubular portion toward one wall of the tubular portion, and the tubular portion includes the tubular portion. The first engagement receiving portion that protrudes inwardly of the portion and engages with the first engagement portion is provided. The counterpart terminal is provided with a spring piece that is electrically connected to the terminal and a first locking receiving portion that is locked to the terminal. Therefore, when a load is applied to the counterpart terminal in the direction of exiting the terminal, the load is not applied to the spring piece when the first latch receiving part receives the load, so that the contact pressure of the spring piece is reduced. The electrical connection between the counterpart terminal and the terminal can be stabilized. Further, the first locking receiving portion is formed to protrude inward from one wall of the cylindrical portion, and does not protrude outward from the cylindrical portion.
It is possible to prevent the first locking receiving portion from being caught by other parts.

According to this invention of Claim 5 , since the said 1st latching receiving part is cut and raised from the said one wall of the said cylindrical part, and is protruded and formed in the inner direction from the said one wall, When the terminal is inserted into the cylindrical portion, the first locking receiving portion and the spring piece can sandwich the terminal from the opposite directions, thereby moving the first locking receiving portion to the first locking portion. And the electrical connection state of the spring piece and the terminal can be further stabilized.

It is a perspective view which shows the electrical junction box concerning the 1st Embodiment of this invention. FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. 1. It is a perspective view which shows the state by which the other party terminal was connected to the terminal of the relay which comprises the electrical junction box shown by FIG. It is sectional drawing which follows the II line | wire in FIG. It is sectional drawing which follows the II-II line | wire in FIG. It is a perspective view which shows the electrical-connection box concerning the 2nd Embodiment of this invention. It is a perspective view which shows the state by which the other party terminal was connected to the terminal of the relay which comprises the electrical junction box shown by FIG. It is a top view which shows the state by which the other party terminal was connected to the terminal of the relay which comprises the electrical junction box shown by FIG. It is sectional drawing which follows the III-III line in FIG. It is sectional drawing which shows a mode that the 2nd protrusion part of an other party terminal latches in the through-hole of a terminal, (A) is a figure which shows a 2nd protrusion part riding on a terminal, (B), It is a figure which shows the state which the 2nd protrusion part latched in the through-hole of the terminal. It is a perspective view which shows the relay and cassette block which comprise the conventional electrical junction box. FIG. 12 is an exploded perspective view showing the relay and cassette block shown in FIG. 11. It is sectional drawing which follows the IV-IV line in FIG.

  Hereinafter, an electrical junction box 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  As shown in FIGS. 1 and 2, the electrical junction box 1 includes a plurality of relays 2, each counterpart terminal 3 connected to each of the plurality of relays 2, a relay 2 and a counterpart terminal 3 connected to each other. A connection box main body 4 in which the connection box main body 4 is accommodated, an upper cover (not shown) attached to the upper side of the connection box main body 4 in the figure, and a lower cover (not shown) attached to the lower side of the connection box main body 4 in the figure. . The relay 2 corresponds to an “electric part” described in the claims.

  As shown in FIG. 2, the relay 2 includes a relay main body 21 and a plurality of terminals 26 protruding from the relay main body 21. The relay body 21 is a cube having a bottom surface 22, a top surface 23 facing the bottom surface 22, and four side surfaces 24A, 24B, 24C, and 24D that connect the edges of the bottom surface 22 and the top surface 23. It is formed in a shape. Of the four side surfaces 24A, 24B, 24C, and 24D, the side surface 24A and the side surface 24C opposite to the side surface 24A are provided with a pair of protrusions 25 that are engaged with through holes 44 described later of the connection box body 4. ing. The relay main body 21 corresponds to a “component main body” recited in the claims, and the protrusion 25 corresponds to a “second locking portion” recited in the claims. Further, an arrow Y in FIG. 1 or the like indicates a direction in which the terminal 26 is inserted into a storage chamber 41 (to be described later) of the junction box body 4.

  The protrusion 25 is formed so as to protrude from the outer surfaces of the side surfaces 24A and 24C. Further, the protrusion 25 is engaged with the through hole 44 of the junction box body 4. In addition, the relay 2 is attached to the junction box body 4 by the projection 25 being locked in the through hole 44. Further, “the protrusion 25 is locked to the through hole 44” means that the protrusion 25 is fitted into the through hole 44.

  The terminal 26 protrudes from the bottom surface 22 of the relay body 21. Each terminal 26 is formed in a plate shape, and a through hole 26a is provided at the center thereof. The through hole 26a corresponds to a “first locking portion” described in the claims.

  A plurality (one in the illustrated example) of the counterpart terminals 3 are provided. Each counterpart terminal 3 is obtained by punching or bending a sheet metal. As shown in FIGS. 2 and 3, each counterpart terminal 3 includes an electrical contact portion 30 connected to the terminal 26, and a wire connection portion 31 connected to the electrical contact portion 30 and connected to an electric wire (not shown). I have. In FIG. 3, the junction box body 4 is omitted.

  The electrical contact portion 30 includes a plate-like bottom wall 32, a pair of side walls 33 erected from both edges in the width direction of the bottom wall 32, and the pair of side walls 33 connected to each other so as to be spaced from the bottom wall 32. A rectangular tube portion 35 into which the terminal 26 of the relay 2 is inserted, and a terminal 26 provided inside the rectangular tube portion 35 and inserted into the rectangular tube portion 35. , And a spring piece 36 that urges toward the top wall 34 that is “one wall”. Further, the rectangular tube portion 35 corresponds to a “tubular portion” described in the claims, and the top wall 34 corresponds to “one wall” described in the claims.

  The ceiling wall 34 is provided with a through hole 34a. The through hole 34 a is provided at a position overlapping the through hole 26 a of the terminal 26 when the terminal 26 of the relay 2 is inserted into the rectangular tube portion 35.

  The spring piece 36 is connected to the inner surface of the bottom wall 32 and is provided in a cantilever shape. The free end of the spring piece is provided with a first protrusion 39 that protrudes toward the inside of the through hole 34a of the top wall 34 and engages with the through holes 26a and 34a that are overlapped with each other. The first projecting portion 39 corresponds to a “first locking receiving portion” recited in the claims.

  The protruding portion 39 is obtained by cutting and raising a part of the spring piece 36. Further, the mating terminal 3 is attached to the terminal 26 by the protruding portion 39 engaging with the through holes 26 a, 34 a overlapped with each other.

  Further, “the protruding portion 39 is locked to the through holes 26 a and 34 a stacked on each other” means that the protruding portion 39 fits into the through holes 26 a and 34 a stacked on each other. Further, when the protruding portion 39 engages with the through hole 26 a of the terminal 26 and the through hole 34 a of the top wall 34, the terminal 26 moves into the protruding portion 39 as the insertion of the terminal 26 into the rectangular tube portion 35 proceeds. The spring piece 36 bends in the direction away from the top wall 34 as it rides on the top, and when the terminal 26 climbs over the protrusion 39, the state before the spring piece 36 is bent is restored, and the through hole 26a and the through hole Lock to 34a.

  Further, the counterpart terminal 3 is attached to the terminal 26 by the first protrusion 39 being engaged with the through hole 26 a and the through hole 34 a. Thus, the counterpart terminal 3 can be held in the connection box body 4 without providing the conventional lance 105 in the connection box body 4.

  The electric wire connection portion 31 is connected to the bottom wall 32 of the electric contact portion 30, and is erected from a base wall 37 that positions the electric wire on the surface, and both ends in the width direction of the base wall 37, and crimps the core wire of the electric wire. A pair of core wire crimping pieces 38.

  The electric wire connecting portion 31 is formed by placing an electric wire having a round cross section in a state in which the insulating coating at the end portion is peeled off and the core wire is exposed on the base wall 37, and then the core wire portion of the electric wire is directed toward the base wall 37. The core wire crimping piece 38 is bent in the direction of pressing, that is, the core wire crimping piece 38 is used to crimp the core wire portion to electrically and mechanically connect the wire.

  The junction box body 4 is composed of a plurality of blocks 46. 2 and 4, only one of the plurality of blocks 46 is shown, and the other blocks 46 are omitted. As shown in the figure, the block 46 includes a block main body 40 having a plurality of storage chambers 41 and a peripheral wall 42 surrounding the relay main body 21.

  Each accommodation chamber 41 accommodates the terminal 26 of the relay 2 and the counterpart terminal 3 inside. The storage chamber 41 is formed in a cylindrical shape whose longitudinal direction extends in the arrow Y direction. That is, both ends in the longitudinal direction of the storage chamber 41 communicate with the outside of the block body 40. In such a storage chamber 41, the terminal 26 of the relay 2 is inserted from one opening in the longitudinal direction, and the counterpart terminal 3 is inserted from the other opening.

  The peripheral wall 42 is erected in a cylindrical shape from the periphery of the upper surface 40a of the block main body 40 on which the bottom surface 22 of the relay main body 21 is overlapped, and overlaps the four side surfaces 24A, 24B, 24C, 24D of the relay main body 21. Further, the peripheral wall 42 has a pair of through holes 44 to which the pair of protrusions 25 of the relay 2 are locked, and a pair of slits 43 provided on both sides of each through hole 44. The through hole 44 corresponds to a “second locking receiving portion” recited in the claims.

  The pair of slits 43 are provided on both sides of the through hole 44. Each slit 43 extends in the direction of the arrow Y and cuts out the edge of the peripheral wall 42. Further, a part of the peripheral wall 42 located between the pair of slits 43 (hereinafter referred to as a bending portion and denoted by reference numeral 45) is elastically deformable in a direction toward and away from the side surfaces 24A and 24C where the protrusions 25 are provided. Is provided.

  Further, when the protrusion 25 is locked in the through hole 44, the bending portion 45 rides on the protrusion 25 and the bending portion 45 moves away from the side walls 24A and 24C as the insertion into the peripheral wall 42 of the relay body 21 proceeds. When the bent portion 45 gets over the top of the protrusion 25, the bent portion 45 is elastically restored to the state before the bent portion 45 is bent, and the protrusion 25 is locked in the through hole 44. In addition, the relay 2 is attached to the junction box body 4 by the projection 25 being locked in the through hole 44.

  In addition, the connection box body 4 does not exert a force on the above-described bending portion 45 even when an electric wire connected to the counterpart terminal 3 is pulled, like a lance 105 that is locked to the counterpart terminal 103 in the conventional electrical connection box 101. Therefore, the bending portion 45 does not need to have the mechanical strength to hold the counterpart terminal 3 in the accommodating chamber 40, and the junction box body 4 having the bending portion 45 is not made of an expensive resin. Also gets better.

  Next, the assembly procedure of the electrical junction box 1 described above will be described with reference to FIGS. First, an electric wire is attached to the electric wire connecting portion 31 of the counterpart terminal 3 in advance. Then, the terminal 26 of the relay 2 is brought close to one opening of the storage chamber 41 of the connection box main body 4 with the peripheral wall 42 of the connection box main body 4 facing upward, and is inserted into the storage chamber 41 along the arrow Y, and the relay The relay 2 is attached to the junction box body 4 by engaging the projections 25 of the two in the through holes 44 of the junction box body 4. Next, with the peripheral wall 42 of the junction box body 4 facing downward, the electrical contact portion 30 side of the counterpart terminal 3 is brought closer to the other opening of the storage chamber 41 and inserted into the storage chamber 41 along the arrow Y, The counterpart terminal 3 is attached to the terminal 26 by locking the protruding portion 39 of the counterpart terminal 3 in the through hole 26 a of the terminal 26. In this way, the terminal 26 and the counterpart terminal 3 are accommodated in the accommodation chamber 41. Finally, the upper cover and the lower cover are attached to the junction box body 4 to complete the assembly of the electrical junction box 1.

  According to the above-described embodiment, the terminal 26 is provided with a through hole 26a (first locking portion), and the counterpart terminal 3 has a protruding portion 39 (first locking receiver) that locks into the through hole 26a. Part), and the mating terminal 3 is attached to the terminal 26 by the projection 39 being engaged with the through hole 26a, so that the projecting part 39 is engaged with the through hole 26a. Since the terminal 3 is held in the junction box body 4, the conventional lance can be abolished, and the material constituting the junction box body 4 can be changed to an inexpensive resin, so that the cost can be reduced. it can. Further, even when the automobile vibrates while traveling, the reliability of electrical connection between the terminal 26 of the relay 2 (electrical component) and the counterpart terminal 3 connected to the terminal 26 can be ensured. Further, the contact pressure between the terminal 26 and the counterpart terminal 3 can be made lower than that of the conventional product, and the insertion force when the terminal 26 is inserted into each storage chamber 41 can be reduced. Improvements can be made.

  The relay main body 21 (component main body) is provided with a protrusion 25 (second locking portion), and the connection box main body 4 has a through hole 44 (second locking receiving portion) for locking to the protrusion 25. Since the projection 25 engages with the through hole 44, the relay 2 can be attached to the junction box body 4, so that the relay 2 can be reliably prevented from falling off the junction box body 4. it can. Further, since the relay 2 can be reliably prevented from falling off the connection box body 4, after the relay 2 is attached to the connection box body 4, the connection box body 4 is turned upside down and the relay 2 is connected to the connection box body 4. Since the counterpart terminal 3 can be inserted into the storage chamber 41 while observing the other opening of the storage chamber 41 while being positioned on the lower side, the assembling workability can be improved.

  The junction box body 4 is provided with a peripheral wall 42 surrounding the relay body 21, and the second locking portion of the relay body 21 is a protrusion 25 provided on the outer surface of the component body. The second latch receiving portion of the junction box body 4 is a recess provided in the inner surface of the peripheral wall 42 or a through hole 44 provided in the peripheral wall 42, and the peripheral wall 42 includes the relay 2. Since a pair of slits 43 extending in the insertion direction Y to the junction box body 4 and notched at the edge of the peripheral wall 42 are provided on both sides of the recess or through hole 44, the relay 2 is connected to the junction box body 4. The relay 2 can be attached to the junction box main body 4 by an easy operation of inserting into the junction box. Moreover, since the peripheral wall 42 surrounding the relay main body 21 is provided in the connection box main body 4, the relay 2 can be attached to the connection box main body 4 without rattling.

  In addition, the first locking portion is a through hole 26a provided in the terminal 26, the counterpart terminal 3 includes a rectangular tube portion 35 (tubular portion) into which the terminal 26 is inserted, and the rectangular tube. A spring piece 36 provided inside the portion 35 and biasing the terminal 26 inserted into the rectangular tube portion 35 toward the top wall 34 (one wall) of the rectangular tube portion 35, and The spring piece 36 is provided with the protruding portion 39 (first locking receiving portion) protruding toward the top wall 34, and the protruding portion 39 and the through hole 34 a provided in the top wall 34 are overlapped with each other. Therefore, the counterpart terminal 3 can be attached to the terminal 26 by an easy operation of inserting the terminal 26 into the rectangular tube portion 35 of the counterpart terminal 3.

  Hereinafter, an electrical junction box 1A according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 10, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 6 and 7, the electrical junction box 1 </ b> A includes a plurality of relays 2 (one in the illustrated example) and each counterpart terminal 3 </ b> A (shown in FIG. 7) connected to each of the plurality of relays 2. A connection box main body 4A in which the relay 2 and the counterpart terminal 3A connected to each other are accommodated, an upper cover (not shown) attached to the upper side of the connection box main body 4A in the figure, and a lower side of the connection box main body 4A in the figure And a lower cover (not shown) attached to the head.

  A plurality (one in the illustrated example) of the counterpart terminals 3A are provided. Each counterpart terminal 3A is obtained by punching or bending a sheet metal. As shown in FIGS. 7 and 8, each counterpart terminal 3 </ b> A includes an electrical contact portion 30 connected to the terminal 26, and a wire connection portion 31 connected to the electrical contact portion 30 and connected to the electric wire 10. ing. 7 to 9, the connection box body 4A is omitted.

  As shown in FIG. 9, the electrical contact portion 30 connects the plate-like bottom wall 32, a pair of side walls 33 erected from both edges in the width direction of the bottom wall 32, and the pair of side walls 33. A square wall portion 35 into which the terminal 26 of the relay 2 is inserted; and a square tube portion 35 provided inside the square tube portion 35. And a spring piece 36 for urging the terminal 26 inserted into the top wall 34 which is “one wall”.

  The top wall 34 is provided with a second protrusion 50 that protrudes toward the inner side of the rectangular tube portion 35 and engages with the through hole 26 a of the terminal 26. The second protrusion 50 is obtained by cutting and raising a part of the top wall 34. In addition, the counterpart terminal 3 </ b> A is attached to the terminal 26 by the second projecting portion 50 engaging with the through hole 26 a. The 2nd protrusion part 50 is corresponded to the "1st latching receiving part" described in the claim. In the present embodiment, the second protrusion 50 is provided on the top wall 34, but the present invention is not limited to this, and the second protrusion 50 is provided on the bottom wall 32, and the bottom wall It may project from 32 toward the inner side of the rectangular tube portion 35.

  Further, “the second protrusion 50 is locked to the through hole 26 a” means that the second protrusion 50 is fitted into the through hole 26 a. Moreover, when the 2nd protrusion part 50 latches in the through-hole 26a of the terminal 26, as shown to FIG. 10 (A) and (B), insertion to the square cylinder part 35 of the terminal 26 advances. Accordingly, the second protrusion 50 bends away from the spring piece 36 (bottom wall 32), the second protrusion 50 rides on the terminal 26, and the second protrusion 50 gets over the edge of the through hole 26a. Thus, the state before the second projecting portion 50 is bent is restored and locked to the through hole 26a.

  In addition to the configuration described above, in the present invention, the second protrusion 50 may have the following configuration. That is, the second protrusion 50 may be formed so as to urge the terminal 26 toward the spring piece 36 in a state of being locked in the through hole 26a. Accordingly, the terminal 26 can be sandwiched between the second protrusion 50 and the spring piece 36.

  Further, as shown in FIG. 10, the top wall 34 is provided with a protrusion 52 that protrudes toward the spring piece 36 at a position facing the spring piece 36. The tip of the second protrusion 50 described above is located closer to the bottom wall 32 than the protrusion 52. In other words, the tip of the second projecting portion 50 projects from the projecting portion 52 toward the inside of the rectangular tube portion 35, that is, toward the bottom wall 32.

  The spring piece 36 is connected to the inner surface of the bottom wall 32 and is provided in a cantilever shape. The free end of the spring piece 36 is in elastic contact with the terminal 26 inserted into the rectangular tube portion 35. When the free end is in elastic contact with the terminal 26, the spring piece 36 is electrically connected to the terminal 26.

  As shown in FIG. 8, the electric wire connecting portion 31 is connected to the bottom wall 32 of the electric contact portion 30, and is erected from a base wall 37 that positions the electric wire 10 on the surface, and both ends of the base wall 37 in the width direction. A pair of core wire crimping pieces 38A for crimping the core wire of the electric wire 10 and a pair of covering portion caulking pieces 38B that are erected from both end portions in the width direction of the base wall 37 and caulk the covering portion of the electric wire 10. I have.

  The junction box body 4A is composed of a plurality of blocks 46. In FIG. 6, only one of the plurality of blocks 46 is shown, and the other blocks 46 are omitted. As shown in the figure, the block 46 includes a block main body 40 having a plurality of storage chambers 41 and a pair of clamping pieces 53 that sandwich the relay main body 21 therebetween.

  The pair of sandwiching pieces 53 are erected in a plate shape from the edge of the upper surface 40 a of the block main body 40, and have a through hole 44 in which the projection 25 of the relay main body 21 is locked. When the relay body 21 is inserted between the pair of sandwiching pieces 53, the pair of sandwiching pieces 53 overlaps the two side surfaces 24 </ b> A and 24 </ b> C of the relay body 21, and the pair of protrusions 25 are engaged with the through holes 44. The relay 2 is attached to the junction box body 4 by the projection 25 being locked in the through hole 44.

  According to the embodiment described above, the first locking portion is configured by the through hole 26 a provided in the terminal 26, and the counterpart terminal 3 </ b> A includes the rectangular tube portion 35 (cylindrical portion) and the inside of the rectangular tube portion 35. And a second projecting portion 50 (first latch receiving portion) that projects inwardly of the rectangular tube portion 35 and engages with the through hole 26a. Is provided. The counterpart terminal 3 </ b> A is provided with a spring piece 36 electrically connected to the terminal 26 and a second projecting portion 50 (first locking receiving portion) that is locked to the terminal 26. Therefore, when a load in the direction of coming out to the counterpart terminal 3A is applied, the load is not applied to the spring piece 36 by the second projecting portion 50 receiving this load, so that the contact pressure of the spring piece 36 is reduced. The electrical connection between the counterpart terminal 3A and the terminal 26 can be stabilized. Moreover, since the 2nd protrusion part 50 protrudes inward from the top wall 34 of the square cylinder part 35, and does not protrude outside from the square cylinder part 35, the 2nd protrusion part 50 is caught in another component. Can be prevented.

  Further, since the second projecting portion 50 is formed so as to project inward from the top wall 34 of the square tube portion 35, when the terminal 26 is inserted into the square tube portion 35, the second projecting portion 50 and the spring are formed. The terminal 26 can be sandwiched between the pieces 36 from opposite directions, whereby the engagement state of the second protrusion 50 to the through hole 26a and the electrical connection state of the spring piece 36 and the terminal 26 are further increased. It can be stabilized.

  In the above-described embodiment, the relay body 21 has a pair of protrusions 25. However, the present invention is not limited to this, and the relay body 21 only needs to have at least one protrusion 25. .

  In the above-described embodiment, the through hole 44 penetrates the peripheral wall 42 or the sandwiching piece 53. However, the present invention is not limited to this, and the through hole 44 may be a recess into which the protrusion 25 is fitted. .

  Moreover, in embodiment mentioned above, the electrical connection box 1 and 1A provided with the some relay 2 and the junction box main bodies 4 and 4A which have the some block 46 in which the said some relay 2 is accommodated were provided. Although it is a structure, this invention is not restricted to this, The electrical connection box is the structure provided with the connection box main body which has the one relay 2 and the one block 46 in which the one relay 2 is accommodated. It may be.

  In addition to the embodiment described above, in the electrical junction box of the present invention, the “junction box body” may be composed of a frame-shaped frame and a cassette block assembled inside the frame. In that case, the cassette block only needs to include one or more blocks 46. An upper cover and a lower cover are attached to the frame.

  In the embodiment described above, the relay 2 is used as an electrical component. However, the present invention is not limited to this, and a fuse may be used as the electrical component.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1, 1A Electrical junction box 2 Relay (electrical parts)
3, 3A Mating terminal 4, 4A Junction box body 21 Relay body (component body)
25 Protrusion (second locking part)
26 Terminal 26a Through hole (first locking part)
34 Top wall (one wall)
34a Through-hole 35 Square tube portion (tubular portion)
36 Spring piece 39 1st protrusion part (1st latching receiving part)
42 Peripheral walls 43 A pair of slits 44 Through holes (second locking receiving portions)
50 2nd protrusion part (1st latching receiving part)
Y Insertion direction

Claims (5)

An electrical component having a component body and a plate-like terminal protruding from the component body;
A counterpart terminal connected to the terminal;
In the electrical junction box comprising the junction box main body in which the terminals connected to each other and the counterpart terminal are accommodated,
The terminal is provided with a first locking portion,
The counterpart terminal is provided with a first locking receiving portion that locks to the first locking portion,
When the first locking receiving portion is locked to the first locking portion, the counterpart terminal is attached to the terminal ,
The first locking portion is a through hole provided in the terminal;
The counterpart terminal is provided inside the cylindrical portion into which the terminal is inserted, and urges the terminal inserted into the cylindrical portion toward one wall of the cylindrical portion. And a spring piece
The spring piece is provided with the first locking receiving portion protruding toward the one wall,
The electrical connection box , wherein the first locking receiving portion is locked to the first locking portion and the through hole provided in the one wall . The component body is provided with a second locking portion,
The connection box main body is provided with a second locking receiving portion for locking to the second locking portion,
The electrical junction box according to claim 1, wherein the electrical component is attached to the junction box main body by the second latching portion being latched to the second latch receiving portion. The connection box body is provided with a peripheral wall surrounding the component body,
The second locking portion of the component body is a protrusion provided on the outer surface of the component body;
The second latch receiving portion of the junction box body is a recess provided in the inner surface of the peripheral wall or a through hole provided in the peripheral wall;
A pair of slits extending in the insertion direction of the electrical component into the junction box body and having a notched edge of the peripheral wall are provided on both sides of the recess or the through hole. Item 3. An electrical junction box. The first locking portion is constituted by a through hole provided in the terminal,
The counterpart terminal is provided inside the cylindrical portion into which the terminal is inserted, and urges the terminal inserted into the cylindrical portion toward one wall of the cylindrical portion. A spring piece, and the cylindrical portion is provided with the first locking receiving portion that protrudes inward of the cylindrical portion and locks to the first locking portion. The electrical junction box according to any one of claims 1 to 3, wherein the electrical junction box is characterized. The electrical connection box according to claim 4, wherein the first locking receiving portion is formed by being cut and raised from the one wall of the cylindrical portion and projecting inward from the one wall. .

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