JP5995783B2 - connector - Google Patents

Description

  The present invention relates to a connector.

  Conventionally, as a connector, a bus bar having a plurality of contact portions arranged in parallel and a connecting portion for integrally connecting the plurality of contact portions, and a locking portion provided at the connecting portion of the bus bar are press-fitted inside. In addition, a housing including a first housing made of a synthetic resin having an opening as a first fitting portion in which a plurality of contact portions are disposed is known (for example, see Patent Document 1).

  In such a connector, in addition to the above-described members, a plurality of terminals each having a contacted portion that comes into contact with a contact portion of a bus bar housed in the first housing can be fitted into the opening of the first housing. A second fitting portion and a second housing made of a synthetic resin that is provided inside the second fitting portion and accommodates a plurality of terminals, respectively.

  And a contact part and a to-be-contacted part are contacted by fitting the opening part of a 1st housing, and the 2nd fitting part of a 2nd housing, and a bus bar and a some terminal are electrically connected. .

Japanese Patent Laid-Open No. 7-73938

  By the way, in the connector like the said patent document 1, in the state which the 1st fitting part of the 1st housing and the 2nd fitting part of the 2nd housing fitted, each member receives thermal shock by a remarkable temperature change etc. May be given.

  When this thermal shock is applied, the plurality of contact portions of the bus bar move in the first fitting portion of the first housing following the thermal expansion or contraction of the connection portion of the bus bar, and the contacted portions of the plurality of terminals are the first contact portions. The second housing moves in the second fitting portion of the second housing following the thermal expansion or contraction of the terminal housing chamber.

  However, since the bus bar and the second housing are formed of different materials, their respective thermal expansion coefficients are different, resulting in differences in the amount of thermal expansion or contraction, and the bus bar contact portion and the terminal contacted portion. There will be a difference in the amount of movement. When such a thermal shock that causes a difference in the amount of movement is repeated, the contact portion and the contacted portion are worn, and the resistance may increase.

  Accordingly, an object of the present invention is to provide a connector that can suppress an increase in resistance between a contact portion of a bus bar and a contacted portion of a terminal due to thermal shock.

  According to the first aspect of the present invention, there is provided a bus bar having a plurality of contact portions arranged in parallel and a connecting portion that integrally connects the plurality of contact portions, and the connecting portion of the bus bar is press-fitted into the inside, and the plurality of contacts. A first housing made of a synthetic resin having a first fitting portion disposed therein, a plurality of terminals each having a contacted portion to be brought into contact with the contact portion of the bus bar, and a first of the first housing From a synthetic resin having a second fitting portion that can be fitted into the fitting portion and a plurality of terminal accommodating chambers that are provided in parallel inside the second fitting portion and accommodate the contacted portions of the plurality of terminals, respectively. A connector having a second housing, wherein a gap between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber is caused by a difference in thermal shock between the bus bar and the second housing. Set to be greater than the amount of movement And features.

  In this connector, the clearance between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber is set to be greater than the amount of movement of the contacted portion of the terminal due to the difference in thermal shock between the bus bar and the second housing. Even if the bus bar and the second housing are thermally expanded or contracted, the inner wall of the terminal accommodating chamber and the contacted portion of the terminal are not in contact with each other by the gap between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber. The arrangement position of the contacted portion of the terminal in the terminal accommodating chamber is not changed.

  Therefore, in such a connector, the arrangement position of the contacted portion of the terminal is not changed by thermal expansion or contraction between the bus bar and the second housing due to thermal shock. The wear between the contact portion of the bus bar and the contacted portion of the terminal due to thermal shock can be suppressed.

  Invention of Claim 2 is a connector of Claim 1, Comprising: The contact part of the said bus bar and the to-be-contacted part of the said terminal are contacted in the direction orthogonal to the arrangement direction of these terminals, The said terminal The movement in the direction perpendicular to the arrangement direction of the plurality of terminals is restricted in the terminal accommodating chamber, and the gap between the contacted part of the terminal and the inner wall of the terminal accommodating chamber is the contacted part of the terminal. It is provided between both sides in the arrangement direction of the plurality of terminals and both side walls in the arrangement direction of the plurality of terminals on the inner wall of the terminal accommodating chamber.

  In this connector, the contact portion of the bus bar and the contacted portion of the terminal are contacted in a direction orthogonal to the arrangement direction of the plurality of terminals, and the movement of the terminal in the direction orthogonal to the arrangement direction of the plurality of terminals is regulated in the terminal accommodating chamber. Therefore, the contacted part of the terminal does not rattle in the direction perpendicular to the arrangement direction of the plurality of terminals in the terminal accommodating chamber, and the contact between the contact part of the bus bar and the contacted part of the terminal can be stabilized. it can.

  Further, the clearance between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber is defined by both sides in the arrangement direction of the plurality of terminals in the contacted portion of the terminal and both side walls in the arrangement direction of the plurality of terminals in the inner wall of the terminal accommodating chamber. Therefore, it is possible to suppress wear between the contact portion of the bus bar and the contacted portion of the terminal due to thermal shock while ensuring the contact between the contact portion of the bus bar and the contacted portion of the terminal. it can.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the connector which can suppress the resistance raise between the contact part of a bus bar and the to-be-contacted part of a terminal by a thermal shock can be provided.

It is a front view of the connector which concerns on embodiment of this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. (A) is a perspective view of the bus bar of the connector which concerns on embodiment of this invention. (B) is a front view of the bus bar of the connector which concerns on embodiment of this invention. (C) is CC sectional drawing of FIG.4 (b). It is a perspective view of the 1st housing of the connector concerning an embodiment of the invention. It is a front view of the 1st housing of the connector concerning an embodiment of the invention. It is DD sectional drawing of FIG. It is EE sectional drawing of FIG. (A) is a perspective view of the terminal of the connector concerning an embodiment of the invention. (B) is a front view of the terminal of the connector which concerns on embodiment of this invention. (C) is FF sectional drawing of FIG.9 (b). It is a perspective view of the 2nd housing of the connector concerning an embodiment of the invention. It is a front view of the 2nd housing of the connector concerning an embodiment of the invention. It is GG sectional drawing of FIG. It is HH sectional drawing of FIG.

  A connector according to an embodiment of the present invention will be described with reference to FIGS.

  The connector 1 according to the present embodiment includes a bus bar 7 having a plurality of contact portions 3 arranged in parallel and a connection portion 5 that integrally connects the plurality of contact portions 3, and the connection portion 5 of the bus bar 7 includes A first housing 11 made of a synthetic resin having a first fitting portion 9 in which a plurality of contact portions 3 are press-fitted into the inside and a contacted portion 13 in contact with the contact portion 3 of the bus bar 7 is provided. A plurality of terminals 15, a second fitting portion 17 that can be fitted into the first fitting portion 9 of the first housing 11, and a contacted portion of the plurality of terminals 15 provided in parallel inside the second fitting portion 17. And a second housing 21 made of a synthetic resin having a plurality of terminal accommodating chambers 19 for accommodating the portions 13 respectively.

  The clearance C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19 is set to be greater than or equal to the amount of movement of the contacted portion 13 of the terminal 15 due to the difference in thermal shock between the bus bar 7 and the second housing 21. ing.

  The contact portion 3 of the bus bar 7 and the contacted portion 13 of the terminal 15 are in contact with each other in a direction orthogonal to the arrangement direction of the plurality of terminals 15, and the terminals 15 are arranged in the terminal accommodating chamber 19. The movement in the direction orthogonal to the direction is restricted, and the gap C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19 has both sides in the arrangement direction of the plurality of terminals 15 in the contacted portion 13 of the terminal 15; It is provided between the side walls 23, 23 in the arrangement direction of the plurality of terminals 15 on the inner wall of the terminal accommodating chamber 19.

  As shown in FIGS. 1 to 13, the bus bar 7 is made of a conductive material such as a copper alloy, and a plurality of contact portions 3 and connecting portions are formed by performing a cutting process or the like on a base material formed in a thin plate shape. 5 is formed of one continuous member.

  The plurality of contact portions 3 are arranged in parallel on one side of the bus bar 7 and each is formed in a tab shape. The plurality of contact portions 3 are integrally formed as one member continuous with the connecting portion 5 on the other end side of the bus bar 7.

  Such a plurality of contact portions 3 are arranged in parallel inside the first fitting portion 9 of the first housing 11 with the connecting portion 5 being press-fitted into the insertion port 25 of the first housing 11.

  The connecting portion 5 is formed in a thin plate shape with one member continuous to the other side of the bus bar 7. In addition, the connecting portion 5 is provided with a plurality of locking holes 27 arranged in parallel at equal intervals. On both side surfaces of the connecting portion 5, two large and small locking projections 29, 31 are provided to project.

  Such a connecting portion 5 is inserted into an insertion port 25 provided at the bottom of the first fitting portion 9 by inserting the bus bar 7 into the first fitting portion 9 of the first housing 11. . By inserting the connecting portion 5 into the insertion port 25, the locking projections 29 and 31 are press-fitted into the insertion port 25, and the bus bar 7 is fixed to the first housing 11.

  The first housing 11 is made of an insulating material such as synthetic resin, is formed in a casing shape, and includes an insertion port 25 and a first fitting portion 9.

  The insertion port 25 is provided inside one side of the first housing 11, and the bottom side of the first fitting portion 9 is opened. Further, a press-fit portion 33 and a locking projection 35 are provided on the bottom side of the insertion port 25.

  The press-fit portions 33 are respectively provided in steps on both side surfaces on the bottom side of the insertion port 25. In the press-fitting portion 33, the engaging protrusions 29 and 31 of the bus bar 7 are press-fitted when the connecting portion 5 of the bus bar 7 is inserted into the insertion port 25.

  A plurality of locking projections 35 are provided in parallel so as to correspond to the plurality of locking holes 27 of the bus bar 7 between the press-fit portions 33 on the bottom side of the insertion port 25. The plurality of locking projections 35 are respectively locked in the plurality of locking holes 27 of the bus bar 7 with the locking protrusions 29 and 31 of the bus bar 7 being press-fitted into the press-fitting portion 33, and the insertion of the connecting portion 5 is performed. Prevents the port 25 from coming off.

  In a state where the connecting portion 5 of the bus bar 7 is press-fitted into such an insertion port 25, the plurality of contact portions 3 of the bus bar 7 are arranged in parallel inside the first fitting portion 9.

  The first fitting portion 9 is formed in a hood shape so that the opening side of the insertion port 25 is a bottom portion and opens toward the other side of the first housing 11. Further, a groove portion 37 into which the lock portion 51 of the second housing 21 is inserted is provided on the upper surface of the first fitting portion 9, and the locked portion to which the lock portion 51 is locked is attached to an end portion in the groove portion 37. A portion 39 is projected.

  The second fitting portion 17 of the second housing 21 is fitted to the first fitting portion 9 on the inner peripheral side. By fitting the first fitting portion 9 and the second fitting portion 17, the plurality of contact portions 3 of the bus bar 7 disposed in the first fitting portion 9 and the second fitting portion 17 are accommodated. The contacted portions 13 of the plurality of terminals 15 thus connected are connected.

  The plurality of terminals 15 are made of a conductive material such as a copper alloy and are female terminals having a box-shaped contacted portion 13. In addition, the plurality of terminals 15 are electrically connected by crimping a crimping portion 41 to a terminal portion of an electric wire (not shown) connected to a power source or a device.

  Each of the contacted portions 13 of the plurality of terminals 15 is provided with an elastic piece 43. The elastic piece 43 is formed of one member whose base end side is continuous from the bottom wall of the contacted portion 13, and whose free end side is bent toward the upper wall of the contacted portion 13 so that it can be bent into the contacted portion 13. Is provided.

  On the free end side of the elastic piece 43, a contact portion 45 is formed that is bent so as to be a contact point with the contact portion 3 of the bus bar 7. The contact portion 45 is brought into contact with the contact portion 3 by the urging force of the elastic piece 43 in a direction orthogonal to the arrangement direction of the plurality of terminals 15 when the contact portion 3 of the bus bar 7 is inserted from the opening of the contacted portion 13. Then, the bus bar 7 and the plurality of terminals 15 are electrically connected.

  The movement of the terminal 15 in the contact direction between the contact portion 3 of the bus bar 7 and the contact portion 45 of the terminal 15 is caused by the regulation protrusion 47 projecting from the lower surface of the contacted portion 13 of the terminal 15 and the terminal accommodation. It is regulated by contact with the upper surface of the inner wall of the chamber 19.

  Due to the restriction of the movement of the terminal 15 in the terminal accommodating chamber 19, the contacted portion 13 of the terminal 15 rattles in the contact direction between the contact portion 3 of the bus bar 7 and the contact portion 45 of the terminal 15 in the terminal accommodating chamber 19. The contact between the contact portion 3 of the bus bar 7 and the contacted portion 13 of the terminal 15 can be stabilized.

  A plurality of such terminals 15 are inserted into the inside of the opening of the second housing 21 on the contacted portion 13 side, and the plurality of terminals 15 in the second housing 21 are positioned on the second fitting portion 17 side. Are accommodated in the terminal accommodating chambers 19 respectively. At this time, the contact portion 13 of the terminal 15 is locked with a locking lance 49 provided in the terminal accommodating chamber 19 so as to be bent, and is prevented from coming off from the second housing 21.

  The second housing 21 is made of the same insulating material as the first housing 11 such as a synthetic resin, is formed in a casing shape, and includes a second fitting portion 17 and a plurality of terminal accommodating chambers 19.

  The second fitting portion 17 is a portion accommodated in the first fitting portion 9 of the first housing 11 in the outer portion of the second housing 21. On the upper surface of the second fitting portion 17, a lock portion 51 is provided so as to be able to bend.

  The lock portion 51 is inserted into the groove portion 37 of the first housing 11 by fitting the second fitting portion 17 into the first fitting portion 9 of the first housing 11. In a regular fitting state with the second fitting portion 17, the second portion is locked to the locked portion 39 in the groove portion 37.

  It should be noted that the end of the lock 51 is exposed to the outside of the groove 37 in a properly fitted state of the first fitting portion 9 and the second fitting portion 17 and is pressed, whereby the lock 51 Is provided with an operation portion 53 that can release the lock between the lock portion 51 and the locked portion 39.

  A plurality of terminal accommodating chambers 19 are provided in the second fitting portion 17 that can be fitted into the first fitting portion 9 of the first housing 11.

  The plurality of terminal accommodating chambers 19 are provided in the second fitting portion 17 in parallel so as to correspond to the plurality of contact portions 3 of the bus bar 7 in the width direction of the second housing 21. The terminal accommodating chamber 19 is open on one side so that the contacted part 13 of the terminal 15 can be inserted, and opened on the other side so that the contact part 3 of the bus bar 7 can be inserted.

  In such a plurality of terminal accommodating chambers 19, the contacted portions 13 of the terminals 15 are respectively inserted from the openings on one side, and are accommodated so that the openings on the other side and the openings of the contacted portions 13 are in the same position. Is done.

  By fitting the second fitting part 17 of the second housing 21 in which the terminal 15 is accommodated in the terminal accommodating chamber 19 in this way into the first fitting part 9 of the first housing 11, The contact portion 3 of the bus bar 7 is inserted from the opening, inserted into the contacted portion 13 of the terminal 15 and brought into contact with the contact portion 45, and the bus bar 7 and the plurality of terminals 15 are electrically connected.

  In the connector 1 thus configured, the first housing 11 is caused by a significant temperature change or the like in a state where the first fitting portion 9 of the first housing 11 and the second fitting portion 17 of the second housing 21 are fitted. In addition, a thermal shock may be applied to the second housing 21 and the bus bar 7.

  When such a thermal shock is applied, the bus bar 7 and the second housing 21 are formed of different materials such as a copper alloy and a synthetic resin. Differences in the amount of heat shrinkage.

  Here, in the plurality of terminal accommodating chambers 19 of the second housing 21, for example, both side surfaces of the contacted portion 13 of the terminal 15 are brought into contact with both side walls 23, 23 of the terminal accommodating chamber 19. When the thermal shock is applied to the second housing 21, the contacted portion 13 of the terminal 15 follows the thermal expansion or thermal contraction of the terminal accommodating chamber 19 of the second housing 21, and the second housing 21 2 Moves in the fitting portion 17.

  On the other hand, the plurality of contact portions 3 of the bus bar 7 move in the first fitting portion 9 of the first housing 11 following the thermal expansion or contraction of the connecting portion 5 of the bus bar 7.

  Therefore, when both side surfaces of the contacted portion 13 of the terminal 15 are in contact with both side walls 23, 23 of the terminal accommodating chamber 19, when a thermal shock is applied to the connector 1, the contact portion 3 of the bus bar 7. And the amount of movement of the terminal 15 with the contacted portion 13 is different.

  When a thermal shock that causes a difference in the amount of movement between the contact portion 3 of the bus bar 7 and the contacted portion 13 of the terminal 15 is repeatedly applied, the plurality of contact portions 3 of the bus bar 7 and the contacted portions of the plurality of terminals 15 are provided. 13. In detail, wear may occur between the contact part 45 in the contacted part 13 and the resistance between the contact part 3 and the contacted part 13 may increase.

  Therefore, in the connector 1, the gap C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19 is the amount of movement of the contacted portion 13 of the terminal 15 due to the difference in thermal shock between the bus bar 7 and the second housing 21. It is set above.

  Specifically, the gap C is formed in the terminal accommodating chamber 19 due to thermal shock of the second housing 21 when both side surfaces of the contacted portion 13 of the terminal 15 are in contact with both side walls 23, 23 of the terminal accommodating chamber 19. The amount of movement of the contacted portion 13 of the terminal 15 that is moved following the thermal expansion or contraction of the terminal 15 is set to be greater than or equal to the amount of movement.

  For this reason, the gap C is between the both sides in the arrangement direction of the plurality of terminals 15 in the contacted portion 13 of the terminal 15 and the both side walls 23 and 23 in the arrangement direction of the plurality of terminals 15 in the inner wall of the terminal accommodating chamber 19. Is provided. The gap C is set so as to increase from the center side of the connecting portion 5 of the bus bar 7 toward both side surfaces.

  For example, if the bus bar 7 is thermally expanded, the contact portion 3 located outside the center of the connecting portion 5 is a portion where the contact portion 3 is located in addition to the amount of movement due to the thermal expansion of the central portion of the connecting portion 5. This is because it is necessary to consider the amount of movement due to thermal expansion of the connecting portion 5.

  Thus, by setting the clearance C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19, even if the bus bar 7 and the second housing 21 are thermally expanded or contracted by thermal shock, the terminal 15 The contacted portion 13 and the side walls 23 and 23 of the terminal accommodating chamber 19 are not in contact with each other, and the arrangement position of the contacted portion 13 of the terminal 15 in the terminal accommodating chamber 19 is not changed.

  For this reason, even if the connector 1 is repeatedly subjected to thermal shock in a state where the first fitting portion 9 of the first housing 11 and the second fitting portion 17 of the second housing 21 are fitted, the bus bar 7 Wear that occurs between the plurality of contact portions 3 and the contact portions 45 in the contacted portions 13 of the plurality of terminals 15 can be suppressed, and an increase in resistance between the contact portions 3 and the contacted portions 13 is suppressed. can do.

  In such a connector 1, the gap C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19 is the amount of movement of the contacted portion 13 of the terminal 15 due to the thermal shock difference between the bus bar 7 and the second housing 21. Thus, even if the bus bar 7 and the second housing 21 are thermally expanded or contracted by thermal shock, the terminal is accommodated by the gap C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19. The inner wall of the chamber 19 and the contacted portion 13 of the terminal 15 are not in contact with each other, and the arrangement position of the contacted portion 13 of the terminal 15 in the terminal accommodating chamber 19 is not changed.

  Therefore, in such a connector 1, the arrangement position of the contacted portion 13 of the terminal 15 is not changed by thermal expansion or thermal contraction between the bus bar 7 and the second housing 21 due to thermal shock. It is possible to suppress wear between the portion 3 and the contacted portion 13 of the terminal 15 and to suppress an increase in resistance between the contact portion 3 of the bus bar 7 and the contacted portion 13 of the terminal 15 due to thermal shock. it can.

  The contact portion 3 of the bus bar 7 and the contacted portion 13 of the terminal 15 are in contact with each other in a direction orthogonal to the arrangement direction of the plurality of terminals 15, and the terminal 15 is arranged in the terminal accommodating chamber 19 with the arrangement direction of the plurality of terminals 15. Since the movement in the orthogonal direction is restricted, the contacted portion 13 of the terminal 15 does not rattle in the direction perpendicular to the arrangement direction of the plurality of terminals 15 in the terminal accommodating chamber 19, and the contact portion 3 of the bus bar 7. And the contact portion 13 of the terminal 15 can be stabilized.

  Further, the gap C between the contacted portion 13 of the terminal 15 and the inner wall of the terminal accommodating chamber 19 is divided into both sides in the arrangement direction of the plurality of terminals 15 in the contacted portion 13 of the terminal 15 and a plurality of the inner walls of the terminal accommodating chamber 19. Since it is provided between both side walls 23 and 23 in the arrangement direction of the terminals 15, the contact of the bus bar 7 by thermal shock is ensured while ensuring the contact between the contact part 3 of the bus bar 7 and the contacted part 13 of the terminal 15. Wear between the portion 3 and the contacted portion 13 of the terminal 15 can be suppressed.

  In the connector according to the embodiment of the present invention, both sides of the connecting portion of the bus bar are press-fitted into the both side walls in the insertion port of the first housing. The press fitting between the bus bar and the first housing may be of any configuration, such as providing and press-fitting this locking portion into a locking hole provided in the insertion port.

DESCRIPTION OF SYMBOLS 1 ... Connector 3 ... Contact part 5 ... Connection part 7 ... Bus bar 9 ... 1st fitting part 11 ... 1st housing 13 ... Contacted part 15 ... Terminal 17 ... 2nd fitting part 19 ... Terminal accommodating chamber 21 ... 2nd Housing C ... Gap 23 ... Side wall

Claims (2)

A bus bar having a plurality of contact portions arranged in parallel and a connecting portion that integrally connects the plurality of contact portions, and a connecting portion of the bus bar is press-fitted into the inside, and the plurality of contact portions are arranged inside. A first housing made of a synthetic resin having one fitting portion, a plurality of terminals each having a contacted portion that comes into contact with the contact portion of the bus bar, and a first fitting portion of the first housing can be fitted. A second housing made of a synthetic resin having a second fitting portion and a plurality of terminal accommodating chambers provided in parallel inside the second fitting portion and accommodating the contacted portions of the plurality of terminals, respectively; A connector,
The clearance between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber is set to be greater than or equal to the amount of movement of the contacted portion of the terminal due to a difference in thermal shock between the bus bar and the second housing. Connector. The connector according to claim 1,
The contact portion of the bus bar and the contacted portion of the terminal are contacted in a direction orthogonal to the arrangement direction of the plurality of terminals,
The terminal is restricted from moving in a direction orthogonal to the arrangement direction of the plurality of terminals in the terminal accommodating chamber,
The clearance between the contacted portion of the terminal and the inner wall of the terminal accommodating chamber is the both sides of the arrangement direction of the plurality of terminals in the contacted portion of the terminal and the arrangement direction of the plurality of terminals on the inner wall of the terminal accommodating chamber. A connector characterized in that it is provided between both side walls.

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