JP2019083146A - Terminal unit - Google Patents

Abstract

To provide a terminal unit that enables acquirement of an effect of reducing insertion resistance and an effect of reducing slide abrasion.SOLUTION: A terminal unit 1 comprises: a terminal case 20 comprising an accommodation tubular part 21 whose one end has a male terminal insertion port 25 into which a male terminal Tm is to be inserted; a terminal body 10 comprising a terminal connection part 11 accommodated inside the accommodation tubular part 21; a contactor holder 60 that is accommodated inside the accommodation tubular part 21 and is disposed so as to be overlapped with the terminal connection part 11; a contactor C that is held by the contactor holder 60 so as to be capable of rolling and moving in directions closer to/apart from one end of the terminal case 20 and comes into contact with the terminal connection part 11 and the male terminal Tm; and a compression coil spring Sc that is held by the contactor holder 60 and energizes the contactor C toward the one end of the terminal case 20. The terminal case 20 comprises an elastic contact piece 31 that is disposed inside the accommodation tubular part 21 and energizes the male terminal Tm toward the contactor holder 60.SELECTED DRAWING: Figure 12

Description

  The technology disclosed by the present specification relates to a terminal unit.

DESCRIPTION OF RELATED ART The terminal metal fitting which used the metal ball as a contact part connected with the other party conductive member is known (refer patent document 1). The terminal fitting includes a pair of resilient contact pieces which are disposed to face each other and whose tips are turned inward. The folded back portion of each elastic contact piece has an elongated hole extending along the insertion direction of the mating conductive member, and a metal ball is disposed inside the elongated hole. When the mating conductive member is inserted between the pair of resilient contact pieces, the pair of resilient contact pieces bend outward, and the elastic restoring force holds each metal ball between the resilient contact piece and the mating conductive member. Will be attached. Thus, the terminal fitting and the mating conductive member are electrically connected.
At the time of insertion of the mating conductive member, the metal ball rolls along the elongated hole according to the movement of the mating conductive member, thereby reducing the insertion resistance and causing sliding wear at the contact portion between the terminal fitting and the mating conductive member. It can be reduced.

European Patent Application Publication No. 2337156

   In the above configuration, when the metal ball reaches the deep end of the long hole in the middle of the insertion operation, the metal ball can not roll further and the reduction effect of the insertion resistance and the sliding wear can not be obtained. I will.

  The terminal unit disclosed by the present specification has a terminal insertion port having a terminal insertion port into which a mating terminal is inserted at one end, and a terminal case provided with a terminal accommodating portion capable of receiving the mating terminal inside; A terminal main body including a terminal connection portion housed in the second terminal and electrically connected to the mating terminal, and a contact holder held in the terminal housing portion and disposed to overlap the terminal connection portion; A contact holder held by the contact holder and held so as to be able to move in a rolling manner toward and away from the one end of the terminal case and contacting the terminal connection portion and the mating terminal, and the contact A compression coil spring which is held by the child holder and biases the contact toward the one end of the terminal case, and the terminal case is disposed inside the terminal accommodating portion and the phase Comprising an elastic contact piece which urges the pin to the contact holder.

  According to the above configuration, by making the rolling path of the contact in the contact holder a sufficient length, it is possible to avoid that the contact can not move in the middle of the insertion operation of the mating terminal, and the mating operation of the mating terminal From the beginning to the end, the reduction effect of the insertion resistance and the reduction effect of the sliding wear can be continuously obtained.

In the above configuration, the terminal case is provided with a caulking portion that caulks and fixes the terminal body and is locked to the contact holder to restrict detachment of the contact holder from the terminal case. I don't care.
According to such a configuration, the caulking portion also serves to prevent the contact holder from coming off, so the configuration of the terminal unit can be simplified.

  According to the terminal unit disclosed by the present specification, it is possible to prevent the contact from being unable to roll and move in the middle of the insertion operation of the mating terminal, and to continue the insertion resistance of the mating terminal from the beginning to the end The reduction effect and the reduction effect of sliding wear can be obtained.

The perspective view of the terminal unit of the embodiment Top view of the terminal unit of the embodiment Front view of the terminal unit of the embodiment Right side view of the terminal unit of the embodiment Left side view of the terminal unit of the embodiment Bottom view of the terminal unit of the embodiment An exploded perspective view of the terminal unit of the embodiment In the embodiment, a perspective view of a contact holder holding a contact and a compression coil spring In the embodiment, a plan view of a contact holder holding a contact and a compression coil spring A-A line sectional view of FIG. 2 B-B sectional view of FIG. 2 FIG. 2 is a cross-sectional view showing the male terminal connected to the terminal unit in the same position as a line B-B in FIG.

  Embodiments will be described with reference to FIGS. 1 to 12. As shown in FIGS. 1 and 7, the terminal unit 1 according to the present embodiment includes a terminal body 10, a terminal case 20 assembled to the terminal body 10, and a contact holder 60 held inside the terminal case 20. And three contactors C held by the contactor holder 60 and three compression coil springs Sc, and are connected to a flat male terminal Tm (corresponding to a mating terminal).

  As shown in FIG. 7, the terminal body 10 includes a flat terminal connection portion 11 and a barrel portion 12 extending from the terminal connection portion 11 and connected to an electric wire. In the terminal connection portion 11, a rectangular plate-like portion of one sheet is folded so that short sides thereof are abutted and doubled.

  As shown in FIG. 7, the terminal case 20 includes a receiving cylindrical portion 21 (corresponding to a terminal receiving portion) that receives the terminal connection portion 11 therein, and an elastic contact piece 31 disposed inside the receiving cylindrical portion 21. A front stop 41 and a terminal assembly 51 extend from the receiving cylinder 21.

  The housing cylindrical portion 21 has a rectangular cylindrical shape with both ends open, and as shown in FIG. 10, the main body holding wall 22 and the opposing wall 23 disposed facing each other, the main body holding wall 22 and the opposing wall 23 It has a pair of side walls 24 connecting the ends. As shown in FIGS. 1 and 11, one of the two openings of the storage cylinder 21 is a male terminal insertion slot 25 (corresponding to a terminal insertion slot) into which the male terminal Tm is inserted, and the other The opening is a main body insertion opening 26 into which the terminal main body 10 is inserted. Each of the pair of side walls 24 has a locking hole 27 for locking the contact holder 60 as shown in FIGS. 4 and 5.

As shown in FIG. 11, the resilient contact piece 31 is a flat spring-like portion disposed inside the receiving cylindrical portion 21 and extending along the opposing wall 23. One end of the elastic contact piece 31 is a base end 32 connected to the opening edge of the male terminal insertion port 25, and the other end is a free end 33.
Most of the elastic contact piece 31 on the side closer to the proximal end 32 gradually separates from the opposing wall 23 as it gets farther from the proximal end 32, and the remaining part closer to the free end 33 approaches the free end 33 It has a mountain shape that gradually approaches the facing wall 23. The top of the mountain is a contact portion 34 in contact with the male terminal Tm.

  The front stop 41 includes a terminal stop wall 42 and a holder stop 43. The terminal retaining wall 42 is a short wall extending from the main body holding wall 22 and extending perpendicularly to the main body holding wall 22 as shown in FIG. 11, and as shown in FIGS. The terminal insertion port 25 is disposed so as to close a part adjacent to the main body holding wall 22. The holder stopper piece 43 is a short plate-like portion extending from the extension end of the terminal stopper wall 42 toward the inside of the receiving cylindrical portion 21 as shown in FIG. It is arranged in parallel.

  The terminal assembling portion 51 includes a receiving plate portion 52 and a pair of caulking pieces 53 (corresponding to caulking portions). The receiving plate portion 52 is a plate-like portion extending from the opening edge of the main body insertion opening 26 and disposed flush with the main body holding wall 22 as shown in FIGS. 6 and 11. Each of the pair of caulking pieces 53 is, as shown in FIG. 4, FIG. 5 and FIG. 6, from each of two side edges (edges perpendicular to the opening edge of the main body insertion opening 26) It is an extending plate-like portion.

  The contactor C is a sphere made of a conductive material such as metal. The compression coil spring Sc has a general shape in which a wire is wound around the axis a plurality of times, and has an outer diameter slightly smaller than the contact C.

  The contactor holder 60 is made of synthetic resin, and includes a holder main body 61 and a cap 81 assembled to the holder main body 61, as shown in FIGS. 7, 8 and 9. The holder main body 61 is a rectangular plate-like member having a thickness slightly smaller than the diameter of the contact C, and one surface (upper surface in FIG. 10) of the front and back surfaces faces the male terminal Tm. The other surface (the lower surface in FIG. 10) 63 is a connection portion facing surface 64 facing the terminal connection portion 11.

  The holder main body 61 has three contact accommodating portions 71A, 71B, 71C, as shown in FIG.

  Among the three contact accommodating portions 71A, 71B, 71C, the contact accommodating portion 71B located at the middle includes a slit portion 72B and a coil hole 75B as shown in FIG. As shown in FIG. 9, the slit portion 72B extends perpendicularly from the end surface (cap mounting surface 62) forming one side of the holder main body 61, and is disposed on a pair of side wall surfaces 73B opposed to each other. It is a slit-like notch section divided by back wall surface 74B which connects between wall surfaces 73B. Each side wall surface 73B is a curved surface which is recessed in the direction away from the opposite side wall surface 73B as shown in FIG. 10, and the curved shape follows the shape of the arc forming the surface of the contact C It is a shape. The coil hole 75B is a bottomed hole which is recessed with reference to the back wall surface 74B, as shown in FIG.

  The contact receiving parts 71A and 71C located at both ends (the upper end and the lower end in FIG. 9) are the same as the contact receiving parts 71B except for the positions of the back wall surfaces 74A and 74C. As shown in FIG. 9, the distance from the cap mounting surface 62 of the back wall surfaces 74A and 74C is shorter than the distance from the cap mounting surface 62 of the back wall surface 74B of the contact accommodating portion 71B.

  The holder body 61 includes a pair of locking claws 65. Each of the pair of locking claws 65 is a protrusion which protrudes from each of two side edges perpendicular to the cap mounting surface 62 in the holder main body 61, as shown in FIG.

  As shown in FIG. 9, the cap 81 extends from the cap main body 82 extending along the cap mounting surface 62 and the cap main body 82, and is accommodated in each of the three contact accommodating portions 71A, 71B, 71C. Plate-like regulating portions 83A, 83B, and 83C. The middle restricting portion 83B is longer than the other two restricting portions 83A and 83C. The cap 81 is assembled to the cap body 82 by press-fitting each of the three restricting portions 83A, 83B, 83C into the inside of each of the three contact accommodating portions 71A, 71B, 71C, and accommodates three contacts. The inlets of the parts 71A, 71B, 71C are closed.

  As shown in FIG. 9, one contact C and one compression coil spring Sc are held inside the contact accommodating portion 71B. As shown in FIG. 10, the contact C is held by being held between the pair of side wall surfaces 73B inside the slit portion 72B. As shown in FIG. 11, one end portion of the compression coil spring Sc is accommodated inside the coil hole 75B, and the other end portion protrudes inside the slit portion 72B. The contactor C and the compression coil spring Sc are prevented from coming off by the restricting portion 83B. The internal space of the slit portion 72B is a movement path of the contact C, and the contact C is between the position where it abuts on the restricting portion 83B and the position where it abuts on the back wall surface 74B along the pair of side wall surfaces 73B. It is possible to roll and move. One end of the compression coil spring Sc is in contact with the contact C, and the other end is in contact with the bottom surface 76B of the coil hole 75B to bias the contact C toward the restricting portion 83B. When the contact C is in contact with the restricting portion 83B, the compression coil spring Sc is slightly shrunk.

  Since the holder body 61 has a thickness slightly smaller than the diameter of the contact C, the contact C is slightly outside of the male terminal facing surface 63 and the connecting portion facing surface 64 as shown in FIG. Projected into

  Similarly, one compression coil spring Sc and one contact C are also held inside the other two contact accommodating portions 71A, 71C.

  At the time of assembling the terminal unit 1, first, the terminal connection portion 11 is inserted into the inside of the accommodation cylindrical portion 21 and abuts on the main body holding wall 22 and the receiving plate portion 52 (see FIG. 11). The terminal connection portion 11 is positioned when the tip end portion abuts against the terminal stop wall 42. Next, the contact holder 60 holding the contact C and the compression coil spring Sc is inserted into the inside of the receiving cylindrical portion 21 until the cap 81 abuts against the holder stop piece 43, and is overlapped on the terminal connection portion 11 (See FIG. 11). The contact holder 60 is pressed in such that each of the two locking claws 65 pushes each of the two side walls 24 outward. Then, each locking claw 65 enters the inside of each locking hole 27 and engages with the hole edge of the locking hole 27, whereby the contact holder 60 is held by the receiving cylindrical portion 21.

  Next, the terminal body 10 is fixed to the terminal case 20 by caulking the pair of caulking pieces 53 to the terminal connection portion 11. The terminal body 10 is electrically connected to the terminal case 20 by being crimped by the caulking piece 53 in a state where the terminal connection portion 11 is in contact with the main body holding wall 22. When the pair of caulking pieces 53 is caulked, the tip end of the caulking piece 53 is disposed along the surface of the terminal connection portion 11 opposite to the main body holding wall 22. As shown in FIG. 11, the holder retaining piece 43 and the caulking piece 53 abut on the contact holder 60, whereby the contact holder 60 can be prevented from coming off the receiving cylindrical portion 21.

  Hereinafter, the movement at the time of the male terminal Tm insertion will be described by taking the contactor C accommodated in the contactor accommodation portion 71B as an example. The contactors C accommodated in the contactor accommodating portions 71A and 71C are the same as the contactors C accommodated in the contactor accommodating portion 71B, and thus the description thereof is omitted.

  When the male terminal Tm is not connected to the terminal unit 1, the distance between the contact portion 34 of the elastic contact piece 31 and the contact holder 60 is slightly smaller than the thickness dimension of the male terminal Tm.

  As shown in FIG. 11, the contact holder 60 is mounted such that the side on which the cap 81 is mounted faces one end (the male terminal insertion port 25 side; the left side in FIG. 11) of the housing cylindrical portion 11. As a result, the contactor C can move in a rolling manner in a direction in which the contactor C approaches or separates from one end of the storage cylinder 11.

  As shown in FIG. 11, the contactor C is biased toward the restricting portion 83B (toward one end of the receiving cylindrical portion 11; to the left in FIG. 11) by the compression coil spring Sc. When a force is applied to contact C to move toward back wall surface 74B, compression coil spring Sc is further contracted, and contact C is moved toward control portion 83B by its elastic restoring force. Push back. Thus, each contact C is held at a position in contact with the restricting portion 83B.

  When connecting the terminal unit 1 and the male terminal Tm, the male terminal Tm is inserted into the inside of the receiving cylindrical portion 21 from the male terminal insertion port 25. The male terminal Tm enters the inside of the housing cylinder 21 and contacts the contact C. As the male terminal Tm moves further inward, the contactor C rolls and moves inward according to the movement of the male terminal Tm. Thereby, the insertion resistance of male terminal Tm can be reduced.

  In the state where the male terminal Tm is inserted to the normal position with respect to the housing cylindrical portion 21, the male terminal Tm abuts on the contact portion 34 as shown in FIG. The elastic contact piece 31 bends so as to approach the opposing wall 23, and its elastic restoring force causes the male terminal Tm to be pressed toward the contactor holder 60, and the male terminal Tm and the contactor C contact with a constant contact pressure Do. Thereby, the terminal unit 1 and the male terminal Tm are electrically connected.

  As described above, according to the present embodiment, the terminal unit 1 has the male terminal insertion port 25 into which the male terminal Tm is inserted at one end, and the terminal including the accommodating cylindrical portion 21 capable of receiving the male terminal Tm therein. A terminal body 10 having a case 20 and a terminal connection portion 11 housed inside the housing cylindrical portion 21 and electrically connected to the male terminal Tm, and a terminal connection portion housed inside the housing cylindrical portion 21 A contact holder 60 is disposed so as to overlap 11 and held by the contact holder 60 so as to be capable of rolling movement in a direction approaching / separating to one end of the terminal case 20, and the terminal connection portion 11 and A contactor C in contact with the male terminal Tm, and a compression coil spring Sc held by the contactor holder 60 and urging the contactor C toward one end of the terminal case 20. The terminal case 20 is a housing cylinder. Inside 21 Comprising a resilient contact piece 31 for biasing disposed in the male terminal Tm towards the contact holder 60.

  According to the above configuration, by making the rolling path of the contact C in the contact holder 60 a sufficient length, it is possible to prevent the contact C from being unable to move in the middle of the insertion operation of the male terminal Tm. From the beginning to the end of the insertion operation of the terminal Tm, it is possible to continuously obtain the reduction effect of the insertion resistance and the reduction effect of the sliding wear.

  Further, the terminal case 20 is provided with a caulking piece 53 that caulks and fixes the terminal body 10 and is locked by the contact holder 60 to restrict the detachment of the contact holder 60 from the terminal case 20. According to such a configuration, since the caulking piece 53 also serves to prevent the contact holder 60 from being removed, the configuration of the terminal unit 1 can be simplified.

Other Embodiments
The art disclosed by the present specification is not limited to the embodiments described above with reference to the drawings and the drawings, and includes, for example, various aspects as follows.
(1) In the above embodiment, the number of the contacts C and the number of the compression coil springs Sc was three, but the number of the contacts and the number of the compression coil springs is not limited to the above embodiment, and two or less or It may be four or more.

(2) In the above embodiment, the caulking piece 53 also serves to prevent the contact holder 60 from coming off, but the configuration for the contact holder 60 to come off may be provided separately from the caulking portion.

DESCRIPTION OF SYMBOLS 1 ... Terminal unit 10 ... Terminal main body 11 ... Terminal connection part 20 ... Terminal case 21 ... accommodation cylinder part (terminal accommodation part)
25 ... Male terminal insertion slot (terminal insertion slot)
31: Elastic contact piece 53: caulking piece (caulking portion)
60: contact holder C: contact Sc: compression coil spring Tm: male terminal (other terminal)

Claims (2)

A terminal case having a terminal insertion port into which a mating terminal is inserted at one end, and a terminal accommodating portion capable of receiving the mating terminal inside;
A terminal body including a terminal connection portion accommodated inside the terminal accommodation portion and electrically connected to the mating terminal;
A contact holder that is accommodated inside the terminal accommodation portion and disposed to overlap the terminal connection portion;
The contact holder is held by the contact holder so as to be capable of rolling movement in a direction approaching and separating from the one end of the terminal case and contacting the terminal connection portion and the mating terminal.
And a compression coil spring which is held by the contact holder and biases the contact toward the one end of the terminal case.
A terminal unit comprising: a resilient contact piece disposed inside the terminal accommodating portion to bias the mating terminal toward the contact holder.   The terminal case is provided with a caulking portion for caulking and fixing the terminal body, and being engaged with the contact holder to restrict the detachment of the contact holder from the terminal case. Terminal unit as described.

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