JP2014157715A - Female terminal and terminal manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a female terminal which can be manufactured at a low cost and can prevent an elastic member from moving with respect to a female terminal body, and also to provide a terminal manufacturing device.SOLUTION: On an inner wall of a female terminal body 2, a wire-side protrusion 21 and a male terminal-side protrusion 22 are provided which protrude inwardly in the radial direction and are separated from each other in the axial direction. Because the wire-side protrusion 21 and the male terminal side-protrusion 22 are arranged at positions different from each other in the circumferential direction, a spring 3 comes into contact with the projections 21 and 22 on respective sides in the axial direction so as to be prevented from moving in the axial direction with respect to the female terminal body 2. At the same time, the female terminal body 2 provided with the projections 21 and 22 can be formed by punching even if it is molded with a mold 4 so that the manufacturing man-hours can be reduced and the number of components can be prevented from increasing, thereby allowing a lower cost.

Description

  The present invention relates to a female terminal in which a female terminal main body is provided with an elastic member for holding a male terminal, and a terminal manufacturing apparatus.

  Conventionally, a male terminal side is provided as a female terminal provided with a cylindrical female terminal main body, and an elastic member that contacts the male terminal and electrically connects the female terminal main body and the male terminal inside the female terminal main body. Have been proposed in which the inner diameter is enlarged and a cap is provided (see, for example, Patent Document 1). In the female terminal described in Patent Document 1, as shown in FIG. 5A, the female terminal main body 101 opens with an inner diameter larger than the inner wall 103 on the male terminal side, and the female terminal main body 101 A concave groove 104 is formed by providing a cap 105 having substantially the same inner diameter as the inner wall 103 on the male terminal side. Since the elastic member 102 is locked by the concave groove 104, the elastic member 102 is prevented from moving in the axial direction with respect to the female terminal main body 101. When the male terminal is inserted and removed, the elastic member 102 becomes the female terminal. This prevents the main body 101 from slipping out or getting into the back.

  However, in the female terminal 100 described in Patent Document 1, since it is necessary to provide the cap 105, the number of parts increases, and the number of manufacturing steps for mounting increases, resulting in an increase in cost. was there.

JP-A-8-31488

  By the way, as shown to FIG. 5 (B), the structure which latches the elastic member 202 by forming the ditch | groove 204 by which the internal diameter was expanded rather than the inner wall 203 in the female terminal main body 201 is also considered. In such a female terminal 200, although parts such as a cap can be omitted, it is necessary to perform cutting to form the concave groove 204, which increases the number of manufacturing steps and causes loss of members due to cutting. This may be disadvantageous in that it increases the cost.

  The objective of this invention is providing the female terminal and terminal manufacturing apparatus which can prevent the movement of the elastic member with respect to a female terminal main body while being able to manufacture at low cost.

  The female terminal of the present invention is provided with a cylindrical female terminal body in which an electric wire is connected to one side in the axial direction and a male terminal is inserted on the other side, and the male terminal is provided inside the female terminal body. An inner side of the female terminal body that protrudes inward in the in-plane direction perpendicular to the axial direction and contacts the elastic member from the one side in the axial direction. A wire-side protruding portion that contacts the elastic member from the other side in the axial direction and that protrudes inward in the in-plane direction, and the wire-side protruding portion and the male terminal-side protruding portion are formed. The part is formed at a position that does not overlap with each other in the axial direction.

  According to the present invention as described above, since the elastic member is in contact with each protrusion on both sides in the axial direction, the elastic member is prevented from moving in the axial direction with respect to the female terminal body. . Also, the protrusions are arranged in positions that do not overlap with each other in the axial direction on the electric wire side and the male terminal side, so that the mold extends from the one side to the other side while avoiding the electric wire side protrusion, and If the female terminal main body is formed using a mold that extends to one side while avoiding the side protrusion, the two molds can be separated from each other in the axial direction, and the protrusion can be cut without cutting. The manufacturing process can be reduced by reducing the number of manufacturing steps, and the loss of members can be reduced. Moreover, it is not necessary to provide a separate component for locking the elastic member, and the number of components can be reduced. The female terminal body may be cylindrical or polygonal as long as it is cylindrical.

  At this time, in the female terminal according to the present invention, the wire-side protrusion is provided at two or more locations separated along the circumferential direction of the inner wall, and the male terminal-side protrusion is along the circumferential direction of the inner wall. It is preferable to be provided at two or more places apart.

  According to such a structure, an elastic member can be more reliably latched by each protrusion part being provided in two or more places. Furthermore, it is preferable that each protrusion is provided at three or more locations. According to such a configuration, the elastic member is prevented from being twisted and deformed with respect to the surface including the contact portion with the protrusion. It is.

  On the other hand, the terminal manufacturing apparatus of the present invention is a terminal manufacturing apparatus provided with a mold for forming the female terminal body of the female terminal, and the mold is the one-side mold that can move relative to each other in the axial direction. A first mold and a second mold that is the mold on the other side, and the first mold is formed with a first inner portion for molding the inner wall, A first recess that is recessed corresponding to the wire-side protrusion and a first extension that extends to the other side while avoiding the first recess are formed on one inner side, and the second mold is The second inner portion is formed with a second inner portion for molding the inner wall, and the second inner portion avoids the second recess and the second recess recessed corresponding to the male terminal side protrusion. A second extension extending to the one side, and in a state where the first mold and the second mold are abutted in the axial direction, The one extension portion is provided to extend to the one end portion of the second recess, and the second extension portion is provided to extend to the other end portion of the first recess. To do.

  According to such a terminal manufacturing apparatus of the present invention, the female terminal main body having each projection can be formed by two molds, and it is not necessary to perform cutting work, reducing manufacturing man-hours and reducing member loss. Can be reduced.

  According to the female terminal of the present invention as described above, the wire side protrusion and the male terminal side protrusion are formed at different positions in the circumferential direction, thereby reducing the number of manufacturing steps and the number of parts at low cost. While being able to manufacture, the movement of the elastic member with respect to the female terminal main body can be prevented.

It is a fragmentary sectional view showing a female terminal concerning an embodiment of the present invention. It is an axial view front view which shows the said female terminal. It is the III-III sectional view in Drawing 2 of the above-mentioned female terminal. It is a perspective view which shows a partial cross section of the manufacturing apparatus which manufactures the said female terminal. It is sectional drawing which shows the female terminal of a prior art.

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

  1 to 3, the female terminal 1 of the present embodiment includes a cylindrical female terminal main body 2 into which an electric wire (not shown) is connected on one side and a male terminal (not shown) is inserted from the other side, and a female terminal main body 2. And a spring 3 as an elastic member provided on the inner side in the radial direction. The female terminal 1 is provided at the tip of the connector and is formed of a conductor, and is electrically connected to the male terminal.

  In this embodiment, the axis passing through the approximate center of the cylinder of the female terminal body 2 is defined as the axis O, the direction in which the axis O extends is defined as the axial direction, the rotational direction around the axis O is defined as the circumferential direction R, and is orthogonal to the axial direction. In addition, the direction passing through the axis O is the radial direction, and in the left-right direction in FIG. 3 (that is, the axial direction), one side to which the electric wire is connected is the electric wire side, and the other side to which the male terminal is inserted is the male terminal side. To do.

  On the inner wall 2 a of the female terminal main body 2, an electric wire side protruding portion 21 and a male terminal side protruding portion 22 that protrude radially inward are formed. The male terminal side protrusion 22 is formed at the axial male terminal side end, and the wire side protrusion 21 is formed at a position spaced apart from the male terminal side protrusion 22 in the axial direction by substantially the same dimension as the axial dimension of the spring 3. Has been. The electric wire side protrusions 21 are formed at three locations having approximately 60 degrees in the circumferential direction at approximately the same axial position and having an interval of approximately 60 degrees. The male terminal side protrusions 22 are formed at three locations having approximately 60 degrees in the circumferential direction at approximately the same axial position and having an interval of approximately 60 degrees. The other is provided at a circumferential position where one of the electric wire side protruding portion 21 and the male terminal side protruding portion 22 is not provided, and the electric wire side protruding portion 21 and the male terminal side protruding portion 22 are alternately provided in the circumferential direction. ing. A thick portion 23 is formed on the axial direction male terminal side of the outer wall 2 b of the female terminal main body 2.

  The spring 3 is formed of a conductive metal, extends in the axial direction and elastically deforms in the radial direction, a ring portion 32 that supports the elastic piece 31 from both sides in the axial direction, and the ring portion 32. And a plurality of contact pieces 33 that are provided apart from each other in the circumferential direction, and at least two contact pieces 33 are provided for each of the protrusions 21 and 22. Abutted and locked. When the male terminal is inserted into the female terminal 1 and the male terminal is inserted inside the spring 3, the elastic piece 31 is elastically deformed by being pushed outward in the radial direction by the male terminal and is restored toward the inner side in the radial direction. The male terminal is held by force. Thus, the spring 3 and the male terminal are electrically connected, while the ring portion 32 is in contact with the inner wall 2a of the female terminal body 2 and the spring 3 and the female terminal body 2 are electrically connected. Thus, the male terminal and the female terminal body 2 are electrically connected.

  Next, a mold for forming the female terminal body 2 will be described.

  In the present embodiment, the female terminal body 2 is an impact press using a pair of molds 4 (first mold 41 and second mold 42) as a mold, using a highly ductile conductive metal M such as aluminum as a material. Is molded by. The set of molds 4 is provided so as to be relatively movable in the axial direction by a moving device (not shown). Here, FIG. 4 (A) shows a closed state in which a set of molds 4 are abutted in the axial direction and an impact press is performed, and FIG. 4 (B) shows an impact of a set of molds 4. The mold open state separated from each other in the axial direction before and after pressing is shown.

  The metal mold 4 includes a first die 41 that performs pressing from the axial electric wire side and a second die 42 that performs pressing from the axial male terminal side. The first die 41 is the female terminal body 2. The first inner part 411 for molding the inner wall 2a and the first outer part 412 for molding the outer wall 2b, and the second mold 42 is the second inner part 421 for molding the inner wall 2a of the female terminal body 2. And a second outer portion 422 for forming the outer wall 2b.

  The first inner portion 411 is provided at a molding position of the electric wire side protrusion 21 and has a first recess 41a having a depth dimension substantially the same as the radial dimension of the electric wire side protrusion 21, and the first recess 41a. First extension portions 41b extending toward the male terminal side in the axial direction are alternately formed at about 60 degrees in the circumferential direction, and the second inner portion 421 is provided at the molding position of the male terminal side protrusion 22 and male. A second recess 42a having a depth dimension substantially the same as the radial dimension of the terminal side protrusion 22 and a second extension 42b extending to the axial electric wire side from the second recess 42a are each approximately 60 in the circumferential direction. They are formed alternately. In the mold closed state, the first extension portions 41b and the second extension portions 42b are alternately arranged in the circumferential direction, the first extension portions 41b and the second recess portions 42a are arranged at substantially the same circumferential position, and the first extension The end portion on the male terminal side of the portion 41b abuts on the end portion on the electric wire side of the second recess portion 42a, and the second extension portion 42b and the first recess portion 41a are arranged at substantially the same circumferential position, The electric wire side end part contacts the male terminal side end part of the first recess 41a.

  The first outer portion 412 has an inner diameter smaller than that of the second outer portion 422, and the thick portion 23 is formed on the outer wall 2 b of the female terminal body 2 due to the difference in inner diameter. The outer portions 412 and 422 may have any outer diameter that is larger than the outer diameter of the female terminal body 2 and has sufficient strength, and any outer shape that can be held by the moving device. Good.

  Next, the operation of the terminal manufacturing apparatus provided with the mold 4 will be described.

  First, the set of molds 4 is opened, and then the metal M is transported between the set of molds 4 by transport means (not shown). Next, when the pair of molds 4 is moved in the direction approaching each other (axial direction) by the moving device to close the mold, the metal M is formed into the shape of the female terminal main body 2 having the protrusions 21 and 22. . Next, when the pair of molds 4 are moved away from each other (axial direction) by the moving device to make the mold open, the female terminal body 2 is obtained. Thereafter, the female terminal body 2 is removed from between the pair of molds 4 by the conveying means to return to the initial mold open state, and the above-described operation is repeated.

  According to this embodiment, there are the following effects.

  That is, since the protrusions 21 and 22 are alternately formed in the circumferential direction on the inner wall 2a of the female terminal body 2, the protrusions 21 and 22 can also be formed when the female terminal body 2 is formed by the impact press. . Accordingly, the protrusions 21 and 22 prevent the spring 3 from moving with respect to the female terminal main body 2, and the protrusions 21 and 22 can be formed without cutting to reduce the number of manufacturing steps. . Further, it is not necessary to provide a separate cap or the like for locking the spring 3, and it is possible to prevent the number of parts from increasing.

  Furthermore, the first extension 41b and the first recess 41a of the first mold 41 are alternately arranged in the circumferential direction, and the second extension 42b and the second recess 42a of the second mold 42 are alternately arranged in the circumferential direction. At the same time, the first extension portions 41b and the second extension portions 42b are alternately arranged in the circumferential direction in the mold closed state, so that the pair of molds 4 are relatively moved in the axial direction, and the protruding portions 21 are moved. , 22 can be molded and die-cut.

  Furthermore, since the electric wire side protruding portion 21 and the male terminal side protruding portion 22 are provided at three positions with an interval of about 60 degrees in the circumferential direction, the spring 3 is reliably engaged by the protruding portions 21 and 22. At the same time, the spring 3 and the projections 21 and 22 abut on the surface orthogonal to the axial direction, and the spring 3 is prevented from being deformed in a direction twisting with respect to the axial direction.

  Further, since at least two contact pieces 33 formed on the outer side in the axial direction of the spring 3 are in contact with the protrusions 21 and 22, the spring 3 is more reliably prevented from being twisted and deformed. It is.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.

  For example, in the above-described embodiment, the wire-side protrusion 21 and the male terminal-side protrusion 22 are provided at three locations that extend approximately 60 degrees in the circumferential direction and have an interval of approximately 60 degrees. As long as the portion 21 and the male terminal side protrusion 22 are arranged at different circumferential positions, any number may be provided with an arbitrary dimension, and the circumferential dimension is smaller than the circumferential interval. May be provided, may be provided at four or more locations, or may be provided at one location or two locations. If the total circumferential dimension of the protrusions 21 and 22 is reduced, the amount of members used can be reduced and the cost can be reduced. If the number of formation portions of the protrusions 21 and 22 is increased, the spring 3 can be more reliably prevented from being deformed and locked. On the other hand, if the number of formation portions is decreased, the mold 4 can be simplified.

  Moreover, in the said embodiment, although the female terminal main body 2 shall be formed in the cylindrical shape, polygonal cylindrical shape may be sufficient, for example, it is an electric wire on each side of the female terminal main body inner wall of a square tube or a hexagonal tube The side protrusions 21 and the male terminal side protrusions 22 may be provided alternately, or two protrusions 21 and 22 may be provided on one side surface.

  In the embodiment, the spring 3 is formed with a plurality of contact pieces 33. However, the contact pieces 33 can be omitted, and the ring portion 32 is in contact with the projections 21 and 22. In addition, if the ring portion 32 is in contact with the protrusions 21 and 22 in the circumferential direction, the deformation of the spring 3 can be prevented more reliably.

  Moreover, although the 1st type | mold 41 and the 2nd type | mold 42 each illustrated the structure which has the outer side parts 412 and 422 which shape | mold the outer wall 2b of the female terminal main body 2 in the said embodiment, the 1st type | mold 41 and the 2nd type | mold 42 were illustrated. The outer part may be provided in one of the two or the outer part may be formed in a separate third mold, and the mold may include the first mold, the second mold, and the third mold. Good. In addition, when it is set as the structure by which an outer part is provided only in a 2nd type | mold, it is necessary to abbreviate | omit the thick part 23 in order to perform die cutting.

  Moreover, in the said embodiment, although the female terminal main body 2 shall be shape | molded by the impact press using the metal mold | die 4 by using the metal M with high ductility as long as it is shape | molded using the above type | molds. For example, you may shape | mold by casting and the appropriate material according to the processing method should just be used. If the female terminal body 2 is molded using the mold as described above, the same effects as in the above embodiment can be obtained.

  In the above embodiment, the male terminal is held by the elastic piece 31 of the spring 3. However, the male terminal and the elastic piece 31 need only be in contact with each other and are electrically connected. The connection between the male terminal and the female terminal may be maintained by fitting the connector housing on the side and the connector housing on the female terminal side.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.

  Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

1 Female terminal 2 Female terminal body 3 Spring (elastic member)
4 Mold (mold)
21 electric wire side protrusion part 22 male terminal side protrusion part 41 1st type | mold 42 2nd type | mold 411 1st inner side part 41a 1st recessed part 41b 1st extension part 421 2nd inner side part 42a 2nd recessed part 42b 2nd extension part

Claims (3)

A cylindrical female terminal main body in which an electric wire is connected to one side in the axial direction and a male terminal is inserted into the other side; an elastic member provided inside the female terminal main body and in contact with the male terminal inside; A female terminal provided with
The inner wall of the female terminal main body protrudes inward in the in-plane direction orthogonal to the axial direction and contacts the elastic member from the one side in the axial direction, and protrudes inward in the in-plane direction and shaft. A male terminal side protrusion that contacts the elastic member from the other side in the direction,
The female terminal, wherein the electric wire side protrusion and the male terminal side protrusion are formed at positions that do not overlap each other in the axial direction. The wire side protrusions are provided at two or more locations separated along the circumferential direction of the inner wall,
2. The female terminal according to claim 1, wherein the male terminal side protrusion is provided at two or more locations separated along a circumferential direction of the inner wall. A terminal manufacturing apparatus comprising a mold for forming a female terminal body of the female terminal according to claim 1 or 2,
The mold includes a first mold that is a mold on the one side and a second mold that is a mold on the other side that are relatively movable in the axial direction.
The first mold is formed having a first inner portion for molding the inner wall,
The first inner portion is formed with a first recess recessed corresponding to the wire-side protrusion, and a first extension extending to the other side avoiding the first recess,
The second mold is formed having a second inner portion for molding the inner wall,
The second inner portion is formed with a second recess recessed corresponding to the male terminal side protrusion, and a second extension extending to the one side avoiding the second recess,
In a state where the first mold and the second mold are abutted in the axial direction, the first extension portion is provided to extend to the one end portion of the second recess, and the second extension portion is The terminal manufacturing apparatus is provided to extend to the other side end of the first recess.

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