JP2016024892A - Female terminal and terminal connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a female terminal which can ensure contact load with a mating terminal sufficiently, without up-sizing the terminal and without complicating as much as possible.SOLUTION: A female terminal has a cylinder part 10 having a terminal insertion chamber 11 for a male terminal 2 formed internally, and provided with a first protrusion 12 protruding to the terminal insertion chamber 11 side, at one of opposite positions of the cylinder part 10, and second protrusions 13 protruding to the terminal insertion chamber 11 side, at the other two positions in front and rear in the insertion direction of the male terminal 2, with reference to the first protrusion 12. The interval d1 of the first protrusion 12 and second protrusion 13 is set shorter than the width d2 of a rod 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a female terminal to which a male terminal is connected, and a terminal connection structure between the male terminal and the female terminal.

  FIG. 4 shows a conventional female terminal. As shown in FIG. 4, the female terminal 100 includes a cylindrical portion 101 in which a terminal insertion chamber 102 is formed, and an electric wire connecting portion 110 that is integrally provided on the rear end side of the cylindrical portion 101. . A rod portion (not shown) of a male terminal which is a mating terminal is inserted into the terminal insertion chamber 102 from the terminal insertion port 103.

  The female terminal 100 is formed by bending a conductive metal punched into a predetermined shape. At one position (the lower part in FIG. 4) of the cylindrical portion 101 facing each other, the elastic contact piece 104 that is folded inward from the front end edge of the terminal insertion port 103 and extends rearward, and protrudes toward the terminal insertion chamber 102 side. A regulating projection 105 that regulates the displacement of the tip of the elastic contact piece 104 is provided. A first protrusion 106 is provided at an intermediate portion in the longitudinal direction of the elastic contact piece 104. A second protrusion 107 that protrudes toward the terminal insertion chamber 102 at a position opposite to the first protrusion 106 is provided at the other position (the upper part in FIG. 4) of the cylinder part 101 that faces each other. The distance between the first protrusion 106 and the second protrusion 107 is set to be shorter than the width of the rod portion (not shown) of the mating terminal.

  The wire connection part 110 is a pair of connection pieces 111 that face each other and are connected to a conductor part of an electric wire (not shown), and a pair of crimping pieces that are arranged on the rear end side of the pair of connection pieces 111 and are crimped to the electric wires. The fastening piece 112 is provided.

  In the above configuration, when the rod portion of the mating terminal is inserted into the terminal insertion chamber 102 from the terminal insertion port 103 at the front end of the cylinder portion 101, the rod portion of the mating terminal comes into contact with the first protrusion 106 and the second protrusion 107. . Then, the elastic contact piece 104 is bent and deformed downward in FIG. The elastic contact piece 104 is bent and deformed to spread between the first protrusion 106 and the second protrusion 107, and insertion of the rod portion is allowed. The first projecting portion 106 and the second projecting portion 107 of the female terminal 100 and the contact surface of the rod portion of the mating terminal are in electrical contact with each other using the bending return force of the elastic contact piece 104 as a contact load. And when an electric current flows through this contact surface, between the female terminal 100 and the other party terminal will energize.

  FIG. 5 shows another conventional female terminal. As shown in FIG. 5, the female terminal 120 includes a cylindrical portion 121 in which a terminal insertion chamber 122 is formed, an electric wire connecting portion 130 provided integrally on the rear end side of the cylindrical portion 121, and the cylindrical portion 121. The outer spring ring 140 is mounted on the outer periphery. A rod portion (not shown) of a male terminal, which is a counterpart terminal, is inserted into the terminal insertion chamber 122.

  The cylinder part 121 and the electric wire connection part 130 are formed by bending a conductive metal plate punched into a predetermined shape. The cylindrical portion 121 includes three slits 123 to 125 extending in the axial direction, a plurality of protrusions 126 protruding toward the terminal insertion chamber 122 and contacting the rod portion of the mating terminal, and protruding in the outer diameter direction. 140 has a plurality of locking protrusions 127 to be locked. One slit 123 is provided over the entire length of the cylindrical portion 121. The other two slits 124 and 125 are provided halfway from the front end to the rear end of the cylindrical portion 121. Thereby, the front-end side of the cylinder part 121 can be elastically deformed to radial direction.

  The outer spring ring 140 is formed in a cylindrical shape by bending a leaf spring material punched into a predetermined shape. The outer spring ring 140 has one slit 141 extending in the axial direction, and is elastically deformable in the radial direction. The inner diameter of the outer spring ring 140 is set to be shorter than the outer diameter of the cylindrical portion 121.

  In the above configuration, first, the outer spring ring 140 is attached to the outer periphery of the cylindrical portion 121 and locked to the locking projection 127, and the rod portion of the mating terminal is inserted into the terminal insertion chamber 122 from the front end of the cylindrical portion 121. Then, since the inner diameter of the outer spring ring 140 is shorter than the outer diameter of the cylindrical portion 121, the outer spring ring 140 is urged in the diameter-expanding direction to bend and deform, and the front end side of the cylindrical portion 121 is reduced in the diameter-reducing direction due to the bending return force. It is elastically deformed. As described above, the protrusion 126 of the cylindrical portion 121 and the contact surface of the rod portion of the mating terminal are in electrical contact with each other using the bending return force of the outer spring ring 140 as a contact load. A current flows through the contact surface to energize the female terminal 120 and the counterpart terminal.

JP 2008-123997 A

  By the way, in the conventional female terminal 100 described above, since the elastic contact piece 104 is provided in the cylindrical portion 101 in order to ensure a contact load with the mating terminal, the structure becomes complicated. In addition, since the space for the elastic contact piece 104 and elastic deformation is required in the cylindrical portion 101, the size is increased.

  Even in the other conventional female terminal 120 described above, the outer spring ring 140 is provided on the outer periphery of the cylindrical portion 121 in order to ensure the contact load with the mating terminal, so that the structure becomes complicated. Moreover, since the space for the installation and elastic deformation of the outer spring ring 140 is necessary on the outer periphery of the cylindrical portion 121, the size of the cylinder portion 121 increases.

  In consideration of the above circumstances, the present invention is a female terminal capable of sufficiently securing a contact load with a counterpart terminal without increasing the size of the terminal or complicating it as much as possible, and a terminal between the male terminal and the female terminal. An object is to provide a connection structure.

  The female terminal of the present invention is a female terminal having a cylindrical portion in which a terminal insertion chamber is formed, in which a rod portion of a mating terminal is inserted into the terminal insertion chamber. The first protrusion projecting toward the terminal insertion chamber is provided at the position of 2 and the other position is the front and rear in the insertion direction of the mating terminal with reference to the position of the first protrusion. A second protrusion that protrudes toward the terminal insertion chamber is provided at one position, and the distance between the first protrusion and the second protrusion is set to be shorter than the width of the rod portion of the mating terminal. A female terminal characterized by the above.

  Each of the first protrusion and the second protrusion is formed in an arc surface when viewed from a direction orthogonal to the insertion direction of the mating terminal, and the arc diameter of the outer surface of the first protrusion is large. It is preferable that the arc diameter of the outer peripheral surface of the second protrusion is small.

  The cylindrical part is preferably cylindrical.

  The terminal connection structure of the present invention includes a male terminal having a rod portion and a female terminal having a cylindrical portion in which a terminal insertion chamber is formed, and the rod of the male terminal is inserted into the terminal insertion chamber of the female terminal. In the terminal connection structure into which the portion is inserted, a first protrusion projecting toward the terminal insertion chamber is provided at one of the cylindrical portions facing each other, and the first projection is provided at the other position. Two second protrusions projecting toward the terminal insertion chamber are provided at front and rear positions in the insertion direction of the male terminal with respect to the position of the protrusion, and an interval between the first protrusion and the second protrusion is set. The terminal connection structure is characterized in that it is set to a dimension shorter than the width dimension of the rod part of the male terminal.

  Each of the first protrusion and the second protrusion is formed in an arc surface when viewed from a direction orthogonal to the insertion direction of the male terminal, and the arc diameter of the outer periphery of the first protrusion is large. It is preferable that the arc diameter of the outer peripheral surface of the second protrusion is small.

  It is preferable that the cylindrical portion of the female terminal has a cylindrical shape, and the rod portion of the male terminal has an outer peripheral surface that is a circumferential surface.

  According to the present invention, when the rod portion of the mating terminal is inserted into the terminal insertion chamber of the cylindrical portion of the female terminal, the distance between the first protrusion and the second protrusion is shorter than the width of the rod portion of the male terminal. The part is urged from both sides by the first protrusion and the second protrusion. Then, since each 2nd protrusion is provided in two positions which become the front and back of the insertion direction of a male terminal on the basis of the position of the 1st protrusion, a rod part is pressed by the 1st protrusion. And bend and deform in the region between the two positions. From the above, each projecting portion of the cylindrical portion and the contact surface of the rod portion of the mating terminal are in electrical contact with each other using the bending return force of the rod portion as a contact load. Therefore, the female terminal can sufficiently ensure a contact load with the mating terminal. Further, since the female terminal has a structure that is not elastically deformed, the structure is not complicated and the terminal is not enlarged.

1 shows an embodiment of the present invention, (a) is a perspective view of a female terminal and a male terminal before terminal connection, (b) is a front view of the female terminal. It is sectional drawing of the female terminal and male terminal which show one Embodiment of this invention before a terminal connection. 1 shows an embodiment of the present invention, (a) is a cross-sectional view of a female terminal and a male terminal in a terminal connection state, (b) is an enlarged cross-sectional view of the main part of (a). It is sectional drawing of a female terminal which shows a 1st prior art example. It is a disassembled perspective view of a female terminal which shows a 2nd prior art example.

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

  1 to 3 show an embodiment of the present invention. The terminal connection structure which concerns on this invention is applied between the female terminal 1 of this embodiment shown in FIGS. 1-3, and the male terminal 2 which is a counterpart terminal. This will be described below.

  The female terminal 1 is disposed in a terminal accommodating chamber in a female connector housing (not shown). The female terminal 1 is formed by bending a conductive metal punched into a predetermined shape. The female terminal 1 includes a cylindrical portion 10 in which a terminal insertion chamber 11 is formed, and a wire connecting portion 20 that is integrally provided on the rear end side of the cylindrical portion 10. The rod portion 3 of the male terminal 2 is inserted into the terminal insertion chamber 11. The rod part 3 consists of a cylindrical body, and the outer peripheral surface 3a is a circumferential surface. The tip 3b of the rod 3 is chamfered.

  The cylinder part 10 is cylindrical shape seen from the insertion direction (arrow direction of FIG. 2) of the male terminal 2. A first protrusion 12 that protrudes toward the terminal insertion chamber 11 is provided at one position (upper part in FIG. 2) of the cylindrical portion 10 that faces each other. At the other position (lower part in FIG. 2) of the cylindrical portion 10 facing each other, the terminal insertion chamber 11 is located at two positions that are front and rear in the insertion direction of the male terminal 2 with respect to the position of the first protrusion 12. A second protrusion 13 protruding to the side is provided. The distance d1 between the first protrusion 12 and the second protrusion 13 is set to be shorter than the width (diameter) dimension d2 of the rod portion 3 of the male terminal 2.

  The first protrusion 12 and the second protrusion 13 are produced by punching when the female terminal 1 is bent. As shown in detail in FIG. 3 (b), the first protrusion 12 and the second protrusion 13 are formed on arcuate surfaces when the outer peripheral surfaces 12 a and 13 a are viewed from the direction orthogonal to the insertion direction of the male terminal 2. At the same time, it is formed in a shape that is long in the width direction of the cylindrical portion 10. The arc diameter of the outer peripheral surface 12a of the first protrusion 12 is set large, and the arc diameter of the outer peripheral surface 13a of the second protrusion 13 is set small.

  The electric wire connecting portion 20 is opposed to each other and is connected to a conductor portion of an electric wire (not shown). The electric wire connecting portion 20 is disposed on the rear end side of the pair of connecting pieces 21 and is crimped to the electric wire. The fastening piece 22 is provided.

  The male terminal 2 has a rod portion 3 having a circumferential surface. The rod portion may be solid or hollow (cylindrical).

  In the above configuration, when the female connector housing (not shown) and the male connector housing (not shown) are fitted, the rod portion 3 of the male terminal 2 is connected to the cylindrical portion 10 of the female terminal 1 in the fitting process. Inserted. At this time, after the rod portion 3 comes into contact with the front second protrusion 13 and the first protrusion 12 and then the tip portion 3a of the rod portion 3 comes into contact with the rear second protrusion 13, the first protrusion 12 is shorter than the width dimension d2 of the rod portion 3 of the male terminal 2, so that the rod portion 3 is urged from both the upper and lower sides by the first projection 12 and the second projection 13. The rod portion 3 is bent and deformed, and insertion of the rod portion 3 is allowed.

  Next, as shown in FIGS. 3 (a) and 3 (b), when the tip 3a of the rod 3 rides on the rear second protrusion 13 and the rod 3 reaches the moving end, the rod 3 Is held between the first and second protrusions 12 and 13 from above and below. Then, since each 2nd protrusion 13 is provided in two positions which become the front and back of the insertion direction of the male terminal 2 on the basis of the position of the 1st protrusion 12, the rod part 3 is each 2nd. In a state of being supported on both sides by the protrusion 13, the first protrusion 12 is pressed downward by a pressing force F. As a result, the rod portion 3 bends and deforms downward from the position indicated by the broken line in FIG. 3B in the region A between the two positions as indicated by the solid line in FIG. 3B (FIG. 3B). Then, for the sake of clarity, the state before the deformation of the rod portion 3 is indicated by a virtual line). As described above, the protrusions 12 and 13 of the female terminal 1 and the contact surface of the rod part 3 of the male terminal 2 are in electrical contact with each other using the bending return force of the rod part 3 as a contact load. A current flows through the contact surface to energize the female terminal 1 and the male terminal 2.

  As described above, the projections 12 and 13 of the female terminal 1 and the contact surface of the rod part 3 of the male terminal 2 are in electrical contact with each other using the bending return force of the rod part 3 as a contact load. 1 can sufficiently ensure a contact load with the male terminal 2. Further, since the female terminal 1 has a structure that does not elastically deform, this structure is not complicated and the female terminal 1 does not increase in size.

  When the rod portion 3 of the male terminal 2 comes into contact with the first protrusion 12, the outer peripheral surface 12 a is formed by an arc surface having a large arc diameter and is long in the width direction of the cylinder portion 10. And the contact area of the 1st protrusion 12 is large. Therefore, the contact resistance between the rod portion 3 and the first protrusion 12 can be reduced.

  Since the outer peripheral surface 13 a of the second protrusion 13 has a smaller arc diameter than the first protrusion 12, the tip 3 b of the rod part 3 is located on the front second protrusion 13 and the first protrusion 12. When moving closer to the moving end while sliding, the outer peripheral surface 13a of the rear second protrusion 13 can be smoothly ridden.

  Since the cylindrical portion 10 is cylindrical when viewed from the insertion direction of the male terminal 2 and the rod portion 3 of the male terminal 2 is formed of a columnar body, the rod portion 3 of the male terminal 2 is fitted into the cylindrical portion 10 in all directions. Yes.

1 Female terminal 2 Male terminal (mating terminal)
DESCRIPTION OF SYMBOLS 3 Rod part 3a Outer peripheral surface 10 Cylinder part 11 Terminal insertion chamber 12 1st protrusion 13 2nd protrusion 12a, 13a Outer surface

Claims (6)

It has a cylindrical part with a terminal insertion chamber formed inside,
A female terminal into which the rod portion of the mating terminal is inserted into the terminal insertion chamber,
A first protrusion that protrudes toward the terminal insertion chamber is provided at one of the cylindrical portions facing each other.
In the other position, there are provided second protrusions that protrude toward the terminal insertion chamber at two positions on the front and rear in the insertion direction of the mating terminal with reference to the position of the first protrusion.
The female terminal, wherein a distance between the first protrusion and the second protrusion is set to be shorter than a width of the rod portion of the mating terminal. The female terminal according to claim 1,
Each of the first protrusion and the second protrusion is formed on an arc surface when viewed from a direction orthogonal to the insertion direction of the mating terminal,
The arc diameter of the outer peripheral surface of the first protrusion is large,
A female terminal, wherein an arc diameter of an outer peripheral surface of the second protrusion is small. The female terminal according to claim 1 or 2,
The said terminal part is a cylindrical shape, The female terminal characterized by the above-mentioned. A male terminal having a rod part;
A female terminal having a cylindrical portion in which a terminal insertion chamber is formed;
The terminal connection structure in which the rod portion of the male terminal is inserted into the terminal insertion chamber of the female terminal,
A first protrusion that protrudes toward the terminal insertion chamber is provided at one of the cylindrical portions facing each other.
In the other position, two second protrusions protruding toward the terminal insertion chamber are provided at front and rear positions in the insertion direction of the male terminal with reference to the position of the first protrusion.
The terminal connection structure, wherein an interval between the first protrusion and the second protrusion is set to be shorter than a width of the rod portion of the male terminal. The terminal connection structure according to claim 4,
Each of the first protrusion and the second protrusion is formed on an arc surface when viewed from a direction perpendicular to the insertion direction of the male terminal,
The arc diameter of the outer peripheral surface of the first protrusion is large,
A terminal connection structure, wherein an arc diameter of an outer peripheral surface of the second protrusion is small. The terminal connection structure according to claim 4 or 5,
The tube connecting portion of the female terminal has a cylindrical shape, and the rod portion of the male terminal has an outer peripheral surface that is a circumferential surface.

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