JP2013161641A - Solderless terminal for electric connector and connector with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solderless terminal for electric connector that can be crimped without using any special tool and can be manufactured at low cost.SOLUTION: There is provided a solderless terminal for electric connector including a main body which extends an insertion direction of a cable core wire, and has a crimp portion, into which the cable core wire is inserted from one end side in the insertion direction and which has a joint, on one end side and a contact portion, extending toward an opposite terminal, on the other end side in the insertion direction, and an external sleeve which is crushed from outside together with the crimp portion while covering the outside of the crimp part, and covers the joint.

Description

  The present invention relates to a crimp terminal for an electrical connector and a connector having the same. In particular, the present invention relates to a crimp terminal for an electrical connector that can be crimped without using a special jig and can be manufactured at low cost, and a connector having the crimp terminal.

  In general, the crimp terminal has a crimp part (barrel) for crimping and connecting to a cable on one end side, and a contact part for contacting the terminal of the mating connector on the other end side. The crimp portion of the open crimp barrel type is formed by a substantially U-shaped groove that receives the cable core wire, and both legs form a crimp piece. A cable core wire is disposed in the substantially U-shaped premises, and the crimping piece is bent by bending the crimp core so as to surround the cable core wire so as to be crimped.

  In Patent Document 1, the two crimping pieces facing each other are bent in a B-shape without overlapping each other and are in contact with each other by being crimped. At that time, in order to prevent the bent tips from being caulked by springback, in Patent Document 2, the tip of the crimping piece is roughened and the frictional force is increased to prevent the springback. It is said.

  Furthermore, without bending the crimping pieces into the above-mentioned B shape, in Patent Document 3, the tips of the crimping pieces are overlapped and then pressed and deformed into a complicated shape to strengthen the mutual engagement. To prevent their separation.

JP-A-2005-050736 Japanese Patent Laid-Open No. 09-185966 Japanese Patent Application Laid-Open No. 07-073950

  Since the crimping piece of the crimping terminal of Patent Documents 1 to 3 holds the cable core wire by pressing, the holding force is strong. However, since the crimping part of any crimping terminal is an open crimp barrel type, when an external force in the direction perpendicular to the contact surface between the crimping pieces acts on these crimping pieces, it can resist this. However, it is relatively easily separated, and as a result, the crimping force is reduced, and the cable core wire may come out of the crimping portion. Furthermore, when performing crimping, a crimping piece must be bent and a special crimping jig for caulking and surrounding the cable core wire must be used, and the cost for preparing the crimping jig is required. .

  A crimp terminal having a closed crimp barrel type crimp part may be used instead of a crimp terminal having an open crimp barrel type crimp part having the above-mentioned problems. In the crimped part of the closed crimp barrel type, the crimping pieces are not separated, and the crimping force is difficult to decrease. In addition, a crimp terminal having a closed crimp barrel-type crimp portion does not need to use a special crimping jig for crimping, and can be crimped by a general tool such as pliers.

  In order to manufacture a crimp terminal having a closed crimp barrel type crimp part, it is necessary to braze the crimp pieces together or to process the crimp part into an annular shape having no seam in the circumferential direction in advance. However, the cost for brazing the crimping pieces and for processing to form an annular shape is expensive. Therefore, it is desired to develop a crimp terminal that can be crimped without using a special jig and can be manufactured at low cost.

  An object of the present invention is to provide a crimp terminal for an electrical connector that can be crimped without using a special jig and can be manufactured at low cost.

  The present invention relates to a crimp terminal for an electrical connector, which is a main body extending in the insertion direction of the cable core wire, and a crimp portion having a seam into which the cable core wire is inserted from one end side in the insertion direction. A main body having a contact portion on the other end side in the insertion direction, and an outer sleeve covering the seam that is crushed from the outside together with the crimp portion while covering the outer side of the crimp portion And a crimp terminal for an electrical connector. The outer sleeve preferably has no seam. Further, an inner sleeve into which a cable core wire is inserted from the one end side is further provided inside the crimping portion, and the inner sleeve is crushed from the outside while being covered with the crimping portion and the outer sleeve. You may make it do. The outer sleeve and the inner sleeve are cylindrical and are preferably formed of metal. Furthermore, it is preferable to have a control protrusion part which is provided between the said crimping | compression-bonding part and the said contact part, protrudes in the direction which cross | intersects the said insertion direction, and controls the grade of the insertion of the said cable core wire.

  Moreover, this invention provides an electrical connector provided with said crimp terminal for electrical connectors.

  Furthermore, the present invention is a method for manufacturing a crimp terminal for an electrical connector, the main body extending in the insertion direction of the cable core wire, and having a seam into which the cable core wire is inserted from one end side in the insertion direction. A step of preparing a body having a crimping portion on the one end side and a contact portion extending on the other end side in the insertion direction on the other terminal side; and the outside with the crimping portion while covering the outside of the crimping portion. Attaching an outer sleeve that covers the seam to be crushed to the outside of the crimping portion. The step of preparing the main body includes a step of punching a metal sheet in accordance with a mold for forming the main body, a step of rounding the punched metal sheet around an insertion direction of the cable core wire, and forming a main body. , May be configured. A step of attaching an inner sleeve into which the cable core wire is inserted from the one end side to the inside of the crimping portion is further provided, and the inner sleeve is crushed from the outside in a state of being covered with the crimping portion and the outer sleeve. You may be made to do.

  The present invention provides a crimp terminal for an electrical connector that can be crimped without using a special jig and can be manufactured at low cost.

It is a perspective view which shows the crimp terminal for electrical connectors which is one Embodiment of this invention. It is a perspective view which shows the main body and outer sleeve of the crimp terminal for electrical connectors shown in FIG. 1 in parallel. (A) It is a front view of the main body of the crimp terminal for electrical connectors shown by FIG. (B) It is a reverse view of the main body of the crimp terminal for electrical connectors shown by FIG. FIG. 3 is a terminal development view of a main body of a crimp terminal for an electrical connector shown in FIG. 2. (A) (B) It is a reference figure used in order to demonstrate the shape isolate | separated into several parts. (A) It is a top view which shows the crimping | compression-bonding terminal and cable for electrical connectors which showed the crimping | compression-bonding part and its vicinity before crimping as a fragmentary sectional view. (B) It is a top view which shows the crimping | compression-bonding terminal and cable for electrical connector which showed the crimping | compression-bonding part and its vicinity after crimping | bonding as a fragmentary sectional view. It is a perspective view which shows the crimp terminal for electrical connectors provided with the inner side sleeve which is one Embodiment of this invention. It is a front view of the crimping terminal for electric connectors which is one embodiment of the present invention in which a crimping part and its neighborhood are shown as a partial section. It is a perspective view which shows the connector and other party connector which are one Embodiment of this invention. It is sectional drawing of the connector shown by FIG. 9, and a mating connector.

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

  FIG. 1 is a perspective view showing a crimp terminal 100 for an electrical connector according to an embodiment of the present invention. FIG. 2 is a perspective view showing the main body 104 and the outer sleeve 108 that constitute the crimp terminal 100 for an electrical connector shown in FIG. 1 in parallel. 3A is a plan view showing the main body 104, and FIG. 3B is a back view obtained by rotating the main body shown in FIG. 3A 180 degrees about the insertion direction 112 as a rotation axis. FIG.

  The main body 104 extends along the insertion direction 112 of the cable core wire. The main body 104 includes a cylindrical crimping part (barrel) 120 into which the cable core wire is inserted on one end side in the insertion direction 112. Further, the main body 104 includes a contact portion 116 that extends toward the mating terminal (not shown) on the other end side in the insertion direction 112. The main body 104 is made of a conductive material such as metal. The electrical connector crimp terminal 100 is a female terminal, but the present invention may be a male terminal by making the contact portion into a pin shape. Moreover, as long as it can electrically connect with the other party terminal, the contact part of another shape may be sufficient. The main body 104 can be formed, for example, by punching out a metal sheet material and rolling it around the insertion direction 112 using the shape shown in the terminal development view of FIG. 4 includes a carrier 140 (on the right side of the chain line), and the metal sheet may be rounded while being connected to the carrier 140, or the metal sheet may be rounded after the carrier 140 is cut off. Also good. Alternatively, the main body 104 may be formed by punching a metal sheet using a terminal development view that does not include a carrier as a mold and rounding the sheet around the insertion direction. The body 104 formed in this way has a seam 124 formed by the ends of the stamped metal sheet material. 1 and 2 is a shape having a C-shaped cross section, but in the crimping portion of another embodiment of the present invention, the crimping portion is viewed from the insertion direction, and the end portion As long as it has a cylindrical shape, it may be U-shaped, C-shaped, V-shaped, etc., and as shown in FIG. It may be. The seam 124 of the electrical connector crimp terminal 100 extends parallel to the insertion direction 112, but may be oblique or bent.

  An outer sleeve 108 can be attached to the outside of the crimping part 120 to cover all or part of the seam 124 of the crimping part 120. The joint 124 of the crimping part 120 has a gap. The inner diameter of the outer sleeve 108 is larger than the outer diameter of the crimping portion 120 in a state where both ends of the joint 124 are brought into contact with each other and the gap is eliminated. On the other hand, the inner diameter of the outer sleeve 108 is equal to or smaller than the outer diameter of the crimping portion 120 in a state where the seam 124 has a gap and no force is applied. Therefore, when the outer sleeve 108 is attached to the crimping part 120, the crimping part 120 is deformed so as to fill the gap, and the diameter is reduced. Since the crimping portion 120 elastically presses the inner wall of the outer sleeve 108 radially outward, the outer sleeve 108 is prevented from falling off by the friction force generated between the inner wall of the outer sleeve 108 and the outer surface of the crimping portion 120. Can do. Further, the crimping portion 120 is provided with a protrusion (not shown) projecting radially outward intersecting the insertion direction 112 at the end edge, to the one end side (cable side) in the insertion direction of the outer sleeve 108 once attached. May be restricted to prevent the outer sleeve 108 from falling off.

  The outer sleeve 108 shown in FIGS. 1 and 2 has a cylindrical shape with a circular cross section, but may have other shapes. The outer sleeve is typically a seamless tubular shape, but in the present invention, even if the outer sleeve has a seam, a portion other than the seam of the outer sleeve is used to form a part of the seam of the crimping portion or Just cover everything. For example, by forming a positioning protrusion by bending a part of the crimping portion and fitting the positioning protrusion with the joint of the outer sleeve, the outer sleeve is prevented from rotating in the circumferential direction around the insertion direction 112. You may make it cover the seam of a crimping | compression-bonding part by parts other than the seam of an outer sleeve. In addition, when the crimping portion and the outer sleeve are viewed from the insertion direction 112, the outer sleeve is prevented from rotating in the circumferential direction around the insertion direction 112 by forming a shape such as a triangle having different radial distances. You may make it cover the seam of a crimping | compression-bonding part by parts other than this seam. The outer sleeve 108 is normally made of a conductive metal, but does not form a conductive path that connects from the cable core wire to the mating terminal via the main body 104, and therefore has no conductivity. May be formed.

  FIG. 6A is a plan view showing the crimping terminal 120 and the cable 150, showing the crimping part 120 before crimping and the vicinity thereof as a partial cross-sectional view. FIG. 6B is a plan view showing the crimping terminal 120 and the cable 150, showing the crimping portion 120 after crimping and the vicinity thereof as a partial cross-sectional view.

  When crimping, as shown in FIG. 6 (A), the cable 150 having the cable core 154 exposed is prepared by peeling off the insulating portion 158 of the cable end 152. With the outer sleeve 108 attached to the crimping portion 120, the cable core wire 154 is inserted into the crimping portion 120. After the insertion of the cable core 154, as shown in FIG. 6B, the outer sleeve 108 and the crimping portion 120 are crushed to a radially inner side 162 perpendicular to the insertion direction 112 by using a tool. The cable core 154 and the electrical connector crimp terminal 100 are crimped and connected. As shown in FIG. 2, the crimp terminal 100 for an electrical connector has a closed crimp barrel-type crimp section because the joint 124 is covered by the outer sleeve 108 even if the main body 104 has the joint 124. In the same manner as described above, it is possible to perform crimping with a general tool such as pliers. Unlike a crimp terminal having an open crimp barrel-type crimp part, a special tool dedicated to crimping is not required, so that the cost required for manufacturing can be suppressed. In addition, the main body 104 can be manufactured by rounding a metal sheet around the insertion direction 112, so that it is not necessary to perform a cutting process using a drill and brazing the seam. It is possible. The outer sleeve is usually manufactured by using a brazing or cutting technique to cut a tubular member extending in the insertion direction without a seam along a plane perpendicular to the insertion direction. Since a large number of outer sleeves can be manufactured from a single brazing or cutting process, the manufacturing cost of one outer sleeve is low.

  Also, as shown in FIGS. 6A and 6B, the electrical connector crimp terminal 100 has a radial direction that is a direction intersecting the insertion direction 112 between the crimp portion 120 and the contact portion 116. A regulation projection 132 projecting inward is provided. Since the main body 108 includes the restricting protrusion 132, the degree of insertion of the cable core wire can be restricted, and the cable can be prevented from coming out from the mating terminal side of the electrical connector crimp terminal 100. In the embodiment of FIG. 6 (A) and FIG. 6 (B), a part of the main body is bent inward to form the restricting protrusion 132, but the restricting protrusion may be formed by other methods. Good.

  As shown in FIG. 7, the electrical connector crimp terminal 100 may include a cylindrical inner sleeve 128 having a circular cross section. If the gap between the inner wall of the crimping part and the cable core wire becomes large, the cable core wire may easily come out of the crimping part even if crimping is performed. By inserting the inner sleeve 128 inside the crimping part 120, the gap between the crimping part 120 and the cable core wire can be filled, so that it is not suitable for the inner diameter of the crimping part 120 of the electrical connector crimping terminal 100 Even when a cable having a cable core wire is used, the reliability of the crimp connection can be maintained. Therefore, by using an inner sleeve suitable for the diameter of the cable core, cable cores of various diameters can be connected with high reliability. Different molds for crimping terminals for electrical connectors are provided for each cable core diameter. No need to prepare.

  The outer diameter of the inner sleeve 128 is the same as or smaller than the inner diameter of the crimping portion 120 in a state where the seam 124 has a gap and no particular force is applied. On the other hand, the outer diameter of the inner sleeve 128 is the same as or larger than the inner diameter of the crimping portion 120 when the outer sleeve 108 is inserted into the crimping portion 120 and the gap between the seams 124 is reduced or the gap is eliminated. . Therefore, when the outer sleeve 108 is attached to the crimping portion 120 and the crimping portion 120 becomes smaller in the circumferential direction so as to fill the gap between the joints 124, the inner surface of the crimping portion 120 presses the inner sleeve 128 radially inward. The inner sleeve 128 can be prevented from falling off by the frictional force generated between the inner surface of the crimping portion 120 and the outer surface of the inner sleeve 128.

  The inner sleeve 128 is conductive in order to form a conductive path that connects from the cable core wire to the mating terminal through the main body, and is usually made of metal. When crimping, the inner sleeve 128 is inserted inside the crimping portion 120, and then the outer sleeve 108 is attached to the outside of the crimping portion 120 so that the crimping terminal 100 is in the state shown in FIG. Further, the cable core wire is inserted into the inner sleeve 128, the outer sleeve 108, the crimping portion 120 and the inner sleeve 128 are crushed radially inward using a tool, and the cable core wire is sandwiched between the cable core wire and the electrical connector. The crimp terminal 100 can be crimped and connected. The length of the inner sleeve 128 in the insertion direction is the same as or slightly shorter than the length of the crimping portion 120 in the insertion direction. Further, the length of the inner sleeve 128 in the insertion direction is configured to be longer than the length of the outer sleeve 108 in the insertion direction. By making the length relationship in the insertion direction of the inner sleeve 128, the crimping portion 120 and the outer sleeve 108 as described above, it becomes easy to crush at the overlapping portion of the inner sleeve 128, the crimping portion 120 and the outer sleeve 108, Contact between the cable core wire and the inner sleeve 128 can be reliably ensured, and electrical continuity can be ensured.

  FIG. 8 is a front view of the crimp terminal 100 for an electrical connector having the inner sleeve 128, the crimp section 120 and the vicinity thereof being shown as a partial cross section. As shown in FIG. 8, in the embodiment having the inner sleeve 128, the tip of the restricting protrusion 132 is positioned radially inward from the inner wall of the inner sleeve 128 in order to restrict the degree of insertion of the cable core wire. Is preferred. Moreover, you may make it the front-end | tip of the control protrusion 132 extend to the center of the radial direction of the crimp terminal 100 for electrical connectors.

  FIG. 9 is a perspective view illustrating a state before the connector 200 having the electrical connector crimp terminal 100 according to the embodiment of the present invention and the mating connector 300 to be fitted to the connector 200 are fitted. 10 is a cross-sectional view of a cross section passing through the centers of the three terminal holding holes 208 and the mating terminal holding holes 308 of the connector 200 and the mating connector 300 shown in FIG. The connector 200 includes five electrical connector crimp terminals 100, but the connector may include another number of electrical connector crimp terminals 100 as necessary. The mating connector 300 has five mating terminals 316 in accordance with the number of electrical connector crimp terminals 100 included in the connector 200. In a normal case, the cable is connected to the fitting portion of the electrical connector crimp terminal 100 and the mating terminal 316 of both the connectors 200 and 300 on the opposite side along the insertion direction 112. In FIG. 10, it is omitted.

  The housing 204 of the connector 200 has a substantially cylindrical shape, and is usually formed of resin. The connector 200 has five terminal holding holes 208 penetrating in the insertion direction 112 in the housing 204. The crimp terminal 100 for electrical contact is inserted from the opening on the cable side of the terminal holding hole 208 and is accommodated in each terminal holding hole 208. The diameter of the opening (mating terminal port 216) on the mating terminal side of the terminal holding hole 208 is larger than the diameter of the contacting part of the mating terminal 316 so that the contacting part of the mating terminal 316 can pass through. The electrical connector crimp terminal 100 includes a locking piece 136 having a taper extending outward in the radial direction from the counterpart terminal side in the insertion direction toward the cable side on the outer surface. The connector 200 has a terminal locking piece (not shown) protruding from the inner wall of the terminal holding hole 208. When the electrical connector crimp terminal 100 is inserted into the terminal holding hole 208, the terminal locking piece comes into contact with the taper and pushes the locking piece 136 radially inward. When the entire locking piece 136 moves to the mating terminal side in the insertion direction from the terminal locking piece, the locking piece 136 returns to its original position by elasticity, and the locking piece 136 engages with the terminal locking piece, Movement of the electrical connector crimp terminal 100 toward the cable in the insertion direction is restricted. The electrical connector crimp terminal 100 has, for example, a protrusion (not shown), and the front end of the protrusion protrudes inward from the inner wall of the terminal holding hole 208 on the cable-side surface 220. The movement to the mating terminal side in the insertion direction is restricted. In the connector 200, the electric connector crimp terminal 100 is fixed in the terminal holding hole 208 by fixing the locking piece 136 using the connector locking piece and the cable-side surface 220 of the inner peripheral portion. The electrical connector crimp terminal 100 may be fixed by another method.

  The housing 304 of the mating connector 300 has a substantially cylindrical shape, and is usually formed of resin. The mating connector 300 has five mating terminal holding holes 308 penetrating in the insertion direction in the housing 304, and the mating terminal 316 is housed in each mating terminal holding hole 308, as with the electrical connector crimp terminal 100. Fixed. The mating connector 300 has a lock groove 310 on the outer surface of the fitting port 311. The lock groove 310 can guide a protrusion (not shown) provided inside the fitting port 211 of the connector 200 and fit with the protrusion, thereby fixing the fitting of both connectors.

  There are various uses for crimp terminals and connectors for electrical connectors, and for example, they can be used in a wide range of industrial fields such as lighting and industrial machinery.

100 Electrical connector crimp terminal 104 Main body 108 Outer sleeve 112 Insertion direction 116 Contact part 120 Crimp part 124 Seam 128 Inner sleeve 132 Restriction protrusion 136 Locking piece 140 Carrier 150 Cable 152 Cable end 154 Cable core wire 158 Insulating part 162 Radial direction Inner 200 Connector 204 Housing 208 Terminal holding hole 211 Fitting port 212 Locking sleeve 216 Mating terminal port 220 Inner peripheral cable side surface 300 Mating connector 304 Housing 308 Mating terminal holding hole 310 Lock groove 311 Mating port 316 Mating terminal

Claims (9)

A main body extending in the insertion direction of the cable core wire, the cable core wire being inserted from one end side in the insertion direction, having a crimping portion having a seam on the one end side, and a contact portion extending toward the mating terminal side A body having at the other end in the insertion direction;
An outer sleeve covering the seam, which is crushed from the outside together with the crimping part in a state of covering the outside of the crimping part,
Crimp terminals for electrical connectors.   The crimp terminal for an electrical connector according to claim 1, wherein the outer sleeve has no seam.   An inner sleeve into which a cable core wire is inserted from the one end side is further provided inside the crimping portion, and the inner sleeve is crushed from the outside while being covered with the crimping portion and the outer sleeve. The crimp terminal for an electrical connector according to claim 1 or 2. The outer sleeve and the inner sleeve are cylindrical and formed of metal.
The crimp terminal for an electrical connector according to claim 3.   4. The device according to claim 1, further comprising a restriction protrusion provided between the crimping portion and the contact portion and protruding in a direction crossing the insertion direction to restrict the degree of insertion of the cable core wire. 5. The crimp terminal for electrical connectors according to claim 1.   An electrical connector comprising the crimp terminal for an electrical connector according to any one of claims 1 to 5. A main body extending in the insertion direction of the cable core wire, the cable core wire being inserted from one end side in the insertion direction, having a crimping portion having a seam on the one end side, and a contact portion extending toward the mating terminal side Preparing a main body having the other end in the insertion direction;
Attaching an outer sleeve covering the seam to the outside of the crimping part, which is crushed from the outside together with the crimping part in a state of covering the outside of the crimping part;
A method of manufacturing a crimp terminal for an electrical connector comprising: The step of preparing the body includes
A step of punching a metal sheet in accordance with a mold for forming the main body,
Rounding the punched metal sheet around the insertion direction of the cable core to form a body; and
The method for manufacturing a crimp terminal for an electrical connector according to claim 7, comprising:   A step of attaching an inner sleeve into which the cable core wire is inserted from the one end side to the inside of the crimping portion is further provided, and the inner sleeve is crushed from the outside in a state of being covered with the crimping portion and the outer sleeve. A method for producing a crimp terminal for an electrical connector according to claim 7 or 8.

Images