JP2009187833A - Wire connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire connection device 11 for enhancing reliability of wire connection even with downsizing attained. <P>SOLUTION: A conductive terminal 16, arranged along a wire insertion direction inside a wire insertion port 22 of a body 12, includes a conductive retainer 17 having a spring force in a direction of pinching the wire 21 together with the conductive terminal 16. An auxiliary spring 18 is provided in overlapping inside the conductive holder 17. By providing the auxiliary spring 18 in overlapping on the conductive retainer 17, the spring force of the conductive retainer 17 and that of the auxiliary spring 18 are synthesized to gain large spring force. The conductive retainer 17 with the large force given retains the wire 21 by pinching it with the conductive terminal 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric wire connecting device for connecting electric wires.

Conventionally, as an electric wire connecting device, an electric wire insertion port and an operation port are arranged in parallel in an insulator, a conductive terminal is arranged along the electric wire insertion direction inside the electric wire insertion port, and the electric wire inserted from the electric wire insertion port A conductive holder, which is a leaf spring having a spring force, is arranged in a direction to hold and hold between the conductive terminal and the conductive terminal. By inserting a jig from the operation port and displacing the conductive holder against the spring force, it is possible to insert and remove the electric wire between the conductive holder and the conductive terminal (for example, Patent Literature 1).
JP-A-2002-324612 (page 3-4, FIGS. 1-4)

  As electrical equipment to which the wire connection device is applied is becoming more complex and diversified, there is a demand for downsizing the wire connection device and for high reliability of the wire connection.

  However, since the thickness of the conductive holder is reduced, the width is reduced, and the distance of the spring movement is reduced in response to the miniaturization of the wire connecting device, the spring force of the conductive holder is reduced and sufficient. There is a problem that it is difficult to obtain reliability of electric wire connection and cannot meet market demands.

  This invention is made | formed in view of such a point, Even if it is a case where it reduces in size, it aims at providing the electric wire connection apparatus which can improve the reliability of electric wire connection.

  The electric wire connecting device according to claim 1 is arranged along the electric wire insertion direction inside the electric wire insertion port, an insulator having an electric wire insertion port into which an electric wire is inserted, and an operation port into which a jig is inserted. With a conductive terminal and a jig that is attached to the conductive terminal and has a spring force in a direction to hold and hold the electric wire inserted from the electric wire insertion port between the conductive terminal and a jig inserted from the operation port A conductive holder that allows the electric wire to be inserted into and removed from the conductive terminal by being displaced against the spring force, and is provided to overlap the conductive holder, and the electric wire is connected to the conductive terminal via the conductive holder. An auxiliary spring having a spring force in a direction to be sandwiched and held between the conductive terminals is provided.

  The electric wire connecting device according to claim 2 is the electric wire connecting device according to claim 1, wherein the conductive holder is joined to a surface of the conductive terminal opposite to the connecting surface with which the electric wire contacts, A spring action portion that is folded back from the end portion via a bending portion, and a holding portion that is bent from the tip of the spring action portion in the direction of the conductive terminal and has an opening through which the conductive terminal is inserted. The electric wire inserted between the opening of the holding part and the connection surface of the conductive terminal is sandwiched and held by the spring force of the spring acting part, and the auxiliary spring includes a joint part, a bending part and a conductive part of the conductive holder. An auxiliary spring joint portion, an auxiliary spring bending portion, and an auxiliary spring action portion, which are arranged to overlap each other inside the spring action portion, and the tip of the auxiliary spring action portion is in contact with the tip of the spring action portion, and the auxiliary Inside the spring action part Parts in which are formed bent in a direction away from the spring acting portion.

  The electric wire connecting device according to claim 3 is the electric wire connecting device according to claim 1 or 2, wherein the electric resistance of the conductive holder is smaller than the electric resistance of the auxiliary spring.

  According to a fourth aspect of the present invention, there is provided the electric wire connecting apparatus according to any one of the first to third aspects, wherein a plurality of auxiliary springs are provided on the conductive holder.

  According to the electric wire connecting device of the first aspect, by providing the auxiliary spring so as to overlap the conductive holder, the spring force of the auxiliary spring is combined with the spring force of the conductive holder to obtain a large spring force. The electric wire holder can be sandwiched and held between the conductive terminals by the conductive holder that can obtain a spring force, and the reliability of the electric wire connection can be improved even if the size is reduced.

  According to the electric wire connecting device of the second aspect, in addition to the effect of the electric wire connecting device according to the first aspect, the auxiliary spring is overlapped on the inner side of the joint portion, the bending portion and the spring action portion of the conductive holder. The auxiliary spring joint, the auxiliary spring bending portion, and the auxiliary spring action portion are provided, the tip of the auxiliary spring action portion is in contact with the tip of the spring action portion, and the intermediate portion of the auxiliary spring action portion is separated from the spring action portion. Therefore, the spring force of the auxiliary spring can be stably transmitted to the conductive holder, and the auxiliary spring can be prevented from being sag by displacement by the jig.

  According to the electric wire connecting device of the third aspect, in addition to the effect of the electric wire connecting device according to the first or second aspect, the spring force of the auxiliary spring can be used. Even if it is small, it is possible to use a material having a low electric resistance, and it is possible to reduce the resistance of the current flowing through the conductive holder in contact with the electric wire and the conductive terminal and to reduce the heat generation due to Joule heat.

  According to the electric wire connecting device of the fourth aspect, in addition to the effect of the electric wire connecting device according to any one of the first to third aspects, by providing the conductive holding device with a plurality of auxiliary springs, By combining the spring force of the plurality of auxiliary springs with the spring force, a larger spring force can be obtained, and the reliability of the electric wire connection can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show a first embodiment.

  As shown in FIGS. 1, 2, and 5, the wire connecting device 11 is a one-terminal structure type, and includes a main body 12 as an insulator, a cover 13 that is detachably attached to the main body 12, and a cover 13. And a terminal unit 14 disposed in the main body 12. The terminal unit 14 is configured by combining a conductive terminal 16, a conductive holder 17, and an auxiliary spring 18.

  The main body 12 is made of an insulating synthetic resin and integrally formed in a thin box shape. A space is formed inside, and an electric wire insertion port 22 into which an electric wire 21 is inserted at one end surface. In addition, an operation port 24 into which a jig 23 such as a minus-shaped screwdriver is inserted is formed side by side, and the cover 13 is provided on the other end surface opposite to the one end surface where the wire insertion port 22 and the operation port 24 are formed. A mounting opening 25 is formed in which is inserted and mounted. Lock holes 26 for locking the cover 13 mounted on the main body 12 are formed on both side surfaces of the main body 12 in the vicinity of the mounting opening 25.

  Inside the main body 12, a holding surface 27 for pressing the conductive holder 17 of the terminal unit 14 is formed inside the electric wire insertion port 22, and a holding groove 28 into which one end of the conductive terminal 16 is inserted is formed. In addition, a stopper surface 29 that restricts the insertion position of the cover 13 to be inserted into the main body 12 is formed near the inside of the operation port 24.

  As shown in FIGS. 1 to 3, the cover 13 is made of a synthetic resin having insulating properties and is integrally formed in an outer shape that can be inserted into and attached to the inside from the mounting opening 25 of the main body 12. A stopper surface 31 that abuts against the stopper surface 29 of the main body 12 to restrict insertion is formed on the end surface of the cover 13 in the insertion direction. On both side surfaces of the cover 13, when the cover 13 is inserted to a predetermined insertion position in the main body 12, it fits into the locking hole 26 of the main body 12, and the locking claw 32 that locks the cover 13 to the main body 12 is secured. Is formed.

  In the center of the cover 13, an opening is formed on one side surface of the cover 13, an end surface in the insertion direction, and an end surface opposite to the insertion direction, and a crank-like shape that fits and holds the conductive terminal 16 of the terminal unit 14. A groove 33 is formed.

  An inclined guide surface 34 facing the conductive holder 17 of the terminal unit 14 is formed on the end surface of the cover 13 in the insertion direction, corresponding to the position of the operation port 24 of the main body 12.

  As shown in FIGS. 1 to 4, the conductive terminal 16 of the terminal unit 14 has a wire connecting portion 41 made of a conductive metal such as copper and formed in an elongated flat plate shape. One end of the connecting portion 41 is formed with an insertion portion 42 that is inserted and held in the holding groove 28 of the main body 12, and the other end of the electric wire connecting portion 41 is fitted and held in the groove portion 33 of the cover 13. A fixed portion 43 is formed, and a terminal portion 44 that protrudes outward from the cover 13 from the fixed portion 43 is formed. The width of the insertion portion 42 is narrower than the wire connection portion 41, and a step 45 is formed between the wire connection portion 41 and the insertion portion 42.

  One surface of the electric wire connecting portion 41 of the conductive terminal 16 is a connecting surface 46 with which the electric wire 21 comes into contact, and this connecting surface 46 is arranged inside the electric wire insertion port 22 along the electric wire insertion direction.

  The conductive holder 17 of the terminal unit 14 is a metal leaf spring having conductivity and springiness, such as copper having a small electric resistance, and is joined to one end of the terminal unit 14 on the surface opposite to the connection surface 46 of the conductive terminal 16. A joining portion 48 is formed, a spring acting portion 50 is folded back from the other end of the joining portion 48 via a curved portion 49, and the holding portion 51 is folded from the tip of the spring acting portion 50 in the direction of the conductive terminal 16. ing. The holding portion 51 is formed with an opening 52 through which one end of the conductive terminal 16 and the joint portion 48 is inserted. The conductive holder 17 has a spring force in a direction to sandwich and hold the electric wire 21 inserted between the opening 52 of the holding portion 51 and the connection surface 46 of the conductive terminal 16.

  One end of the joint portion 48 of the conductive holder 17 is formed to be narrow so as to be inserted into the opening portion 52, and a step portion where both side edges of the opening portion 52 of the holding portion 51 engage with both sides of the joint portion 48. 53 is formed. A joint hole 54 for joining the auxiliary spring 18 is formed in the joint portion 48.

  The auxiliary spring 18 of the terminal unit 14 is a metal leaf spring having a spring property, such as stainless steel or a stainless alloy, and is overlapped on the inside of the joint portion 48, the curved portion 49, and the spring action portion 50 of the conductive holder 17. The auxiliary spring joint 58, the auxiliary spring bending portion 59, and the auxiliary spring action portion 60 are disposed.

  At the center of one end of the auxiliary spring joint 58 of the auxiliary spring 18, a coupling piece 61 that is inserted into and coupled to the coupling hole 54 of the conductive holder 17 is bent into a substantially L shape. In addition, the tip of the auxiliary spring acting part 60 is in contact with the tip of the spring acting part 50, and the intermediate part of the auxiliary spring acting part 60 is bent in a direction away from the spring acting part 50.

  Note that the electrical resistance of the conductive holder 17 is smaller than the electrical resistance of the auxiliary spring 18.

  In order to assemble the terminal unit 14, first, as shown in FIG. 4, the auxiliary spring joint 58 of the auxiliary spring 18 is provided inside the joint 48, the curved portion 49, and the spring acting portion 50 of the conductive holder 17. The auxiliary spring bending portion 59 and the auxiliary spring action portion 60 are arranged so as to overlap each other, and the coupling piece 61 of the auxiliary spring 18 is inserted into the coupling hole 54 of the conductive holder 17 to be coupled to the inside of the conductive holder 17. Auxiliary spring 18 is incorporated. Subsequently, the conductive terminal 16 is assembled into the conductive holder 17 by inserting the insertion part 42 of the conductive terminal 16 between the opening 52 of the holding part 51 of the conductive holder 17 and the joint 48 (see FIG. 3). ).

  Next, as shown in FIG. 1, to assemble the wire connecting device 11, first, the terminal unit 14 is attached to the cover 13 by fitting the fixing portion 43 of the conductive terminal 16 into the groove portion 33 from one side of the cover 13. Install. Subsequently, the cover 13 incorporating the terminal unit 14 is inserted from the mounting opening 25 of the main body 12, the insertion portion 42 of the conductive terminal 16 is inserted into the holding groove 28 of the main body 12, and the stopper surface 31 of the cover 13 is inserted into the stopper of the main body 12. The locking claws 32 on both sides of the cover 13 are locked to the locking holes 26 on both sides of the main body 12 while being brought into contact with the surface 29.

  In the assembled state of the electric wire connecting device 11, the connection surface 46 of the conductive terminal 16 is arranged along the electric wire insertion direction inside the electric wire insertion port 22, and the spring action portion 50 of the conductive holder 17 is arranged inside the operation port 24. The front end and the guide surface 34 of the cover 13 are arranged to face each other. Further, the spring force of the conductive holder 17 and the auxiliary spring 18 moves the tip of the spring action portion 50 of the conductive holder 17 away from the conductive terminal 16, and the opening located on the tip side of the holding portion 51. The edge of the portion 52 is in contact with the connection surface 46 of the conductive terminal 16, the surface of the holding portion 51 faces the wire insertion port 22, and the wire 21 cannot be inserted.

  Then, in order to connect the electric wire 21 to the electric wire connecting device 11, the jig 23 is inserted from the operation port 24 and inserted between the tip of the spring action portion 50 of the conductive holder 17 and the guide surface 34 of the cover 13, The tip of the spring action portion 50 is displaced in a direction approaching the conductive terminal 16 against the spring force of the conductive holder 17 and the auxiliary spring 18.

  Thereby, the edge of the opening 52 located on the distal end side of the holding part 51 is separated from the connection surface 46 of the conductive terminal 16, and the opening 52 in which the electric wire 21 can be inserted between the connection surface 46 of the conductive terminal 16 is provided. And the portion of the opening 52 that opens between the conductive terminal 16 and the connection surface 46 faces the wire insertion port 22.

  In that state, the tip of the electric wire 21 is inserted from the electric wire insertion port 22 and inserted into the portion of the opening 52 that opens between the connection surface 46 of the conductive terminal 16, and then the conductive holder 17 by the jig 23 is inserted. Release the displacement operation and remove the jig 23 from the operation port 24. With this, the spring force of the conductive holder 17 and the auxiliary spring 18 moves the tip of the spring action portion 50 of the conductive holder 17 in the direction away from the conductive terminal 16, and the opening located on the tip side of the holder 51 The electric wire 21 is crimped to the connection surface 46 of the conductive terminal 16 at the edge of 52, and the electric wire 21 is held in an electrically connected state.

  If the electric wire 21 is a covered electric wire, the covering at the tip is removed in advance to expose the core wire, and this core wire is inserted into the opening 52 portion opened between the connecting surface 46 of the conductive terminal 16.

  Further, when removing the electric wire 21 from the electric wire connecting device 11, the jig 23 is inserted from the operation port 24 and inserted between the tip of the spring action portion 50 of the conductive holder 17 and the guide surface 34 of the cover 13, The tip of the spring action portion 50 is displaced in a direction approaching the conductive terminal 16 against the spring force of the conductive holder 17 and the auxiliary spring 18.

  As a result, the edge of the opening 52 located on the distal end side of the holding portion 51 is separated from the connection surface 46 of the conductive terminal 16, and the holding of the electric wire 21 sandwiched between the connection surface 46 of the conductive terminal 16 is released. .

  In this state, the electric wire 21 is pulled out from the electric wire insertion port 22, and then the displacement operation of the conductive holder 17 by the jig 23 is released.

  In the electric wire connecting device 11, the auxiliary spring 18 is provided so as to overlap the conductive holder 17, so that a large spring force can be obtained by combining the spring force of the auxiliary spring 18 with the spring force of the conductive holder 17. The electric wire 21 can be sandwiched and held between the conductive terminals 16 by the conductive holder 17 that can obtain this large spring force. Therefore, even when the terminal unit 14 is downsized to arrange the terminal units 14 at a narrow pitch, it is possible to ensure the reliability of electric wire connection.

  In addition, the auxiliary spring 18 includes an auxiliary spring joint 58, an auxiliary spring curved portion 59, and an auxiliary spring acting portion that are arranged inside the joint 48, the curved portion 49, and the spring acting portion 50 of the conductive holder 17, respectively. 60, the tip of the auxiliary spring action part 60 is in contact with the tip of the spring action part 50, and the intermediate part of the auxiliary spring action part 60 is bent in a direction away from the spring action part 50. The spring force can be stably transmitted to the spring acting portion 50 of the conductive holder 17, and the auxiliary spring 18 can be prevented from being sagged due to the displacement by the jig 23.

  In addition, since the spring force of the auxiliary spring 18 can be used, it is possible to use a material having a low electric resistance for the conductive holder 17 even if the spring force is smaller than that of the auxiliary spring 18, and the electric wire 21 and the conductive terminal 16 It is possible to reduce the resistance of the current flowing through the conductive holder 17 in contact with the heat, and to reduce heat generation due to Joule heat.

  Note that the wire connecting device 11 is not limited to the one-terminal structure type, but also applied to a two-terminal structure type in which two one-terminal structure types are arranged side by side as in the second embodiment shown in FIG. In addition, as in the third embodiment shown in FIG. 7, it can be applied to a three-terminal structure type in which three one-terminal structure types are arranged in an integrated manner, and a plurality of a plurality of one-terminal structure types arranged in an integrated manner. Applicable to terminal structure type.

  Further, as shown in the fourth embodiment in FIGS. 8 and 9, two auxiliary springs 18 may be provided on the inner side of the conductive holder 17. In this case, a first auxiliary spring 18 provided to be in contact with the inside of the conductive holder 17 and a second auxiliary spring 18 provided to be in contact with the inside of the first auxiliary spring 18 Is provided. The first auxiliary spring 18 having the same shape as that of the first embodiment is used, and the second auxiliary spring 18 is connected to one end of the auxiliary spring joint 58 at the coupling piece of the first auxiliary spring 18. A pair of coupling pieces 65 coupled to both sides of 61 are bent.

  Thus, by providing two auxiliary springs 18 on the conductive holder 17, the spring force of the two auxiliary springs 18 is combined with the spring force of the conductive holder 17 to obtain a larger spring force, The reliability of wire connection can be further improved.

  When a plurality of auxiliary springs 18 are used in an overlapping manner, not only the two auxiliary springs 18 but also three or more auxiliary springs 18 may be used.

It is sectional drawing of the electric wire connection apparatus which shows the 1st Embodiment of this invention. It is sectional drawing of the electric wire connection state of an electric wire connection apparatus same as the above. It is a perspective view of the assembly state of the cover of the electric wire connection apparatus same as the above, a conductive terminal, a conductive holder, and an auxiliary spring. It is a perspective view of the assembly state of the electrically conductive holder and auxiliary spring of an electric wire connection apparatus same as the above. It is a perspective view of an electric wire connection apparatus same as the above. It is a perspective view of the electric wire connection apparatus which shows the 2nd Embodiment of this invention. It is a perspective view of the electric wire connection apparatus which shows the 3rd Embodiment of this invention. It is sectional drawing of the electric wire connection apparatus which shows the 4th Embodiment of this invention. It is a perspective view of the assembly state of the conductive terminal of the electric wire connection apparatus same as the above, a conductive holder, and an auxiliary spring.

Explanation of symbols

11 Wire connection device
12 Body as an insulator
16 Conductive terminal
17 Conductive holder
18 Auxiliary spring
21 Electric wire
22 Wire insertion slot
23 Jig
24 Control port
46 Connection surface
48 joints
49 Curved part
50 Spring action part
51 Holding part
52 opening
58 Auxiliary spring joint
59 Auxiliary spring curve
60 Auxiliary spring action

Claims (4)

An insulator having an electric wire insertion port into which an electric wire is inserted and an operation port into which a jig is inserted;
Conductive terminals arranged along the electric wire insertion direction inside the electric wire insertion port,
The wire is attached to the conductive terminal and has a spring force in a direction to hold the electric wire inserted from the wire insertion port between the conductive terminal and resists the spring force by a jig inserted from the operation port. A conductive holder that enables insertion and removal of an electric wire between the conductive terminal by being displaced,
And an auxiliary spring having a spring force in a direction to be sandwiched and held between the conductive terminal and the conductive terminal via the conductive holder. Wire connection device. The conductive holder includes a joint portion joined to a surface opposite to the connection surface with which the electric wire of the conductive terminal contacts, a spring action portion folded back from the end portion of the joint portion via a curved portion, and the spring action portion It has a holding part which is bent in the direction of the conductive terminal from the tip and has an opening through which the conductive terminal is inserted, and is inserted between the opening of the holding part and the connection surface of the conductive terminal. The electric wire is sandwiched and held by the spring force of the spring action part,
The auxiliary spring has an auxiliary spring joint portion, an auxiliary spring curved portion, and an auxiliary spring action portion that are arranged to overlap each other inside the joint portion, the curved portion, and the spring action portion of the conductive holder, and the auxiliary spring action portion. The wire connecting device according to claim 1, wherein a tip of the contact portion is in contact with a tip of the spring acting portion, and an intermediate portion of the auxiliary spring acting portion is bent in a direction away from the spring acting portion. The electric wire connecting device according to claim 1 or 2, wherein the electric resistance of the conductive holder is smaller than the electric resistance of the auxiliary spring. The electric wire connecting device according to any one of claims 1 to 3, wherein a plurality of auxiliary springs are provided on the conductive holder.

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