JP2016091847A - Terminal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal fitting capable of restricting efficiency an opening and a deformation in a butted part.SOLUTION: A terminal fitting 10 comprises a cylindrical body part 11, and the body part 11 includes: an engaging groove 15 is a part that a plate-like main substrate 12 having a pair of butted end surfaces 13 and 14 in parallel with each other becomes a cylindrical shape in a state of butting the pair of butted end surfaces 13 and 14 respectively, and that is recessed to a first butted end surface 13 as a reference of the first butted end surface 13, and of which a width is increased as separating from the first butted end surface 13; an engaging convex part 16 that is a convex part fitting into the engaging groove 15 in a second butted end surface 14, that is projected from the second butted end surface 14, and of which the width is increased as separating from the second butted end surface 14; and an engaging end surface 16A having a groove bottom surface 15A in which the engaging groove 15 is inclined to the first butted end surface 13 to an internal surface, and in which the engaging convex part 16 is contacted with the groove bottom surface 15A.SELECTED DRAWING: Figure 8

Description

  The technique disclosed by this specification is related with a terminal metal fitting.

  A terminal fitting provided with a cylindrical terminal connecting portion for receiving a mating terminal inside and a wire connecting portion connected to an electric wire is generally formed by punching a single metal plate into a predetermined shape. Manufactured by bending. The terminal connecting portion is formed by bending a rectangular plate-like portion serving as the terminal connecting portion in the base material into a cylindrical shape and abutting and joining both end portions (butting portions). In order to join the butted portions, a groove is formed in one of the butted portions, which gradually widens from the opening toward the inside, and the other butted portion is locked to the groove and is directed from the root toward the tip. In some cases, a so-called dovetail structure is employed in which convex portions that gradually widen are arranged (see, for example, Patent Document 1).

JP-A-7-326415

  In the terminal fitting employing the above-described joining structure, the butt portion can be prevented from being deformed against a force pulled along the circumferential direction of the terminal connecting portion. However, when a force is applied from the direction intersecting the circumferential direction of the terminal connecting portion due to an external impact or the like, the convex portion may be detached from the groove portion, and the butted portion may be opened and deformed.

  The terminal fitting disclosed in this specification includes a cylindrical main body, and the main body includes a pair of butted end surfaces parallel to each other, and the pair of butted end surfaces abut each other. A locking portion that is a cylindrical shape in a state of being formed and is recessed with respect to one of the abutting end surfaces of the pair of abutting end surfaces with reference to the one abutting end surface, and widens as the distance from the one abutting end surface increases. The other abutting end surface has a groove that is fitted into the locking groove and protrudes from the other abutting end surface, and has a locking convex portion that widens as the distance from the other abutting end surface increases. The locking groove has a first inclined surface that is inclined with respect to the abutting end surface on an inner wall surface thereof, and the locking convex portion is in contact with the first inclined surface. In has a second inclined surface for engaging the first inclined surface.

  According to the above configuration, the locking groove and the locking projection have a so-called dovetail structure, and the locking projection is pulled along the circumferential direction of the main body by engaging the locking groove. The joint portion between one butted end surface and the other butted end surface is prevented from opening against the force applied. In addition, the locking groove has a first inclined surface inclined with respect to one abutting end surface on the inner wall surface, and the locking convex portion has a second inclined surface that comes into contact with the first inclined surface. Therefore, even when a force is applied from the direction intersecting the circumferential direction of the main body, the first inclined surface and the second inclined surface are engaged with each other, and the locking convex portion is detached from the locking groove. Is regulated. Thereby, it can control effectively that a butting part opens and deforms.

  As an aspect of the technology disclosed by this specification, the following configurations are preferable.

  The locking groove has a groove bottom surface extending in parallel with the one butting end surface, and the locking projection has a locking surface extending in parallel with the other butting end surface; The first inclined surface may be disposed on the groove bottom surface, and the second inclined surface may be disposed on the locking surface.

  The first inclined surface is disposed on the groove bottom surface extending in parallel with the one abutting end surface in the locking groove, and the second inclined surface extends in parallel with the other abutting end surface in the locking convex portion. By disposing in this manner, it is possible to effectively prevent the locking projection from coming off the locking groove with the minimum necessary configuration.

  The main body portion has a separation portion partly separated from the main body substrate, and one of the first inclined surface and the second inclined surface is disposed in the vicinity of the separation portion. The surface may be inclined so as to enter the inner peripheral surface side of the main body portion with respect to the other inclined surface.

  As described above, in the case where the main body portion has a separation portion that is partially separated from the main body substrate, it is difficult for the separation portion to follow the bending of the main body substrate when the main body substrate is bent. For this reason, in the region close to the separation portion in the main body substrate, the residual stress generated by bending is relatively large. For this reason, when a force is applied from the direction intersecting the circumferential direction of the main body, the main body is easily deformed so that the one closer to the separation portion of the locking groove and the locking projection is opened outward.

  In order to solve this problem, of the first inclined surface and the second inclined surface, the surface disposed in the vicinity of the separation portion is inclined so as to enter the inner peripheral surface side of the main body with respect to the other surface. I did it. According to such a structure, it arrange | positions among the 1st inclined surfaces and the 2nd inclined surfaces which are arrange | positioned near the isolation | separation part, ie, the side which has a comparatively large residual stress in a main body board | substrate, and is easy to open outside. Since the formed surface is disposed on the inner peripheral surface side of the main body portion and is pressed from the outer peripheral surface side by the other surface, it is possible to effectively restrict the main body portion from opening and deforming.

  According to the technique disclosed in the present specification, it is possible to provide a terminal fitting that can effectively restrict the butting portion from opening and deforming.

The top view of the high frequency connector to which the coaxial cable was connected in embodiment. In the embodiment, the bottom view of the high-frequency connector to which the coaxial cable is connected In the embodiment, a right side view of a high-frequency connector to which a coaxial cable is connected In the embodiment, a left side view of a high-frequency connector to which a coaxial cable is connected In the embodiment, the front view of the high frequency connector to which the coaxial cable is connected In the embodiment, the rear view of the high frequency connector to which the coaxial cable is connected AA line sectional view of FIG. BB sectional view of FIG.

  The embodiment will be described with reference to FIGS. The terminal fitting 10 of the present embodiment is an outer conductor terminal used for the high frequency connector 1 connected to the coaxial cable 40.

  First, the coaxial cable 40 will be described. As shown in FIGS. 6 and 7, the coaxial cable 40 includes an inner conductor 41 formed by twisting a plurality of metal strands, a first coating 42 covering the outer periphery of the inner conductor 41, and the first coating 42. An outer conductor 43 covering the outer periphery of the outer conductor 43 and a second coating 44 covering the outer periphery of the outer conductor 43. The outer conductor 43 is formed of a braided wire in which the same metal wires as the inner conductor 41 are knitted in a mesh shape, and is exposed by peeling the second coating 44 on the end portion of the coaxial cable 40. Similarly, the inner conductor 41 is exposed by peeling off the first covering 42 at the end portion of the coaxial cable 40.

  Next, the terminal fitting 10 will be described. The terminal fitting 10 is formed by punching a metal flat plate into a predetermined shape and then bending it, and as shown in FIG. 1, a cylindrical main body 11 and one end of the main body 11 are formed. The electric wire connection part 20 which continues from is provided.

  The main body 11 has a main body substrate 12. The main body substrate 12 is a rectangular flat plate as a whole in a state in which a metal flat plate is punched into a predetermined shape (a state before bending), and constitutes the main body portion 11 by being bent into a cylindrical shape by bending. . The main body substrate 12 has a pair of butted end surfaces 13 and 14 that are parallel to each other at both ends. When the body substrate 12 is bent into a cylindrical shape as shown in FIG. Butted and joined.

  The pair of butted end surfaces 13 and 14 are joined by a so-called dovetail. Specifically, as shown in FIG. 1, the main body 11 includes a locking groove 15 on one of the paired end surfaces 13, 14 (first butted end surface 13) and the other butted end surface (first surface). 2 has a locking projection 16 on the end face 14).

  As shown in FIG. 1, the locking groove 15 is a groove that is recessed with respect to the first abutting end surface 13, and is a groove bottom surface 15 </ b> A (first inclined surface) that extends in parallel with a space from the first abutting end surface 13. And two groove side surfaces 15B continuous from both ends of the groove bottom surface 15A to the first butted end surface 13. As shown in FIG. 8, the groove bottom surface 15 </ b> A is inclined in a direction in which the depth of the groove increases as it goes from the outer peripheral surface of the main body 11 to the inner peripheral surface, that is, in a direction away from the first abutting end surface 13. Yes. As shown in FIG. 1, the distance between the two groove side surfaces 15B increases as the distance from the first butted end surface 13 increases (as the groove bottom surface 15A is approached). The width increases as the distance from the center increases.

  As shown in FIG. 1, the locking convex portion 16 is a convex portion that protrudes from the second butting end surface 14 and fits inside the locking groove 15, and is parallel to the second butting end surface. 16A (locking surface, corresponding to the second inclined surface) and two locking side surfaces 16B continuous from both ends of the locking end surface 16A to the second butted end surface 14. As shown in FIG. 8, the locking end surface 16 </ b> A extends in a direction in which the protruding length of the convex portion increases from the outer peripheral surface of the main body 11 toward the inner peripheral surface, that is, in a direction away from the second abutting end surface 14. Inclined. As shown in FIG. 1, the distance between the two locking side surfaces 16 </ b> B increases as the distance from the second abutting end surface 14 increases (as the locking end surface 16 </ b> A approaches). A trapezoidal shape that widens as the distance from the butt end surface 14 increases.

  Thus, the locking groove 15 and the locking projection 16 have a dovetail structure, and when the locking projection 16 engages with the locking groove 15, the circumferential direction of the main body 11 (FIG. 1). The joint portion between the first butted end surface 13 and the second butted end surface 14 is prevented from opening against the force pulled along the vertical direction. As shown in FIG. 8, the inclination of the locking end surface 16 </ b> A with respect to the second abutting end surface 14 coincides with the inclination of the groove bottom surface 15 </ b> A with respect to the first abutting end surface 13. 16A and the groove bottom surface 15A are in contact with each other. The locking end surface 16A enters the inner peripheral surface side of the main body 11 with respect to the groove bottom surface 15A, and the groove bottom surface 15A presses the locking end surface 16A from the outer peripheral surface side of the main body portion 11.

  The main body 11 has a slit 17 that penetrates from the outer peripheral surface to the inner peripheral surface of the main body 11. As shown in FIG. 4, the slit 17 extends along the axial direction of the main body portion 11, and is provided with two vertical slit portions 17 </ b> A that are spaced apart from each other, and one of the two vertical slit portions 17 </ b> A. It has a substantially U-shape having a lateral slit portion 17B that connects the end portions to each other, and a portion surrounded by the slit 17 is partly separated from the main body substrate 12 and can be flexed elastically. It is a non-prevention piece 18 (corresponding to a separation part). As shown in FIG. 1, the retaining piece 18 is disposed in a region closer to the second abutting end surface 14 than the center position between the first abutting end surface 13 and the second abutting end surface 14 in the main body substrate 12.

  As shown in FIG. 7, a metal inner conductor terminal 30 is accommodated inside the main body portion 11, and a dielectric member 31 that insulates between these is provided between the inner conductor terminal 30 and the main body portion 11. It is arranged. The inner conductor terminal 30 is electrically connected to the inner conductor 41 exposed from the first coating 42 at the end of the coaxial cable 40. The dielectric member 31 is prevented from coming off by the retaining piece 18.

  As shown in FIGS. 3 and 4, the electric wire connection portion 20 rises from the elongated bottom wall 21 that continues from the main body portion 11, the wire barrel 22 that rises from the side edge of the bottom wall 21, and the side edge of the bottom wall 21. An insulation barrel 23 is provided. The wire barrel 22 is disposed closer to the main body 11 than the insulation barrel 23. The wire barrel 22 is a portion to be crimped to the outer conductor 43 exposed from the second coating 44 at the end of the coaxial cable 40, and the insulation barrel 23 is formed in a portion covered with the second coating 44 in the coaxial cable 40. This is the part to be crimped. The inner conductor terminal 30 is electromagnetically shielded by the main body portion 11 by grounding the wire connecting portion 20 to a portion of the outer conductor 43 exposed from the second coating 44.

  As described above, according to the present embodiment, the locking groove 15 and the locking projection 16 have a so-called dovetail structure, and when the locking projection 16 is engaged with the locking groove 15, the main body The joint portion between the first butted end surface 13 and the second butted end surface 14 is prevented from opening against the force pulled along the circumferential direction of the portion 11.

  In addition, the locking groove 15 has a groove bottom surface 15A inclined with respect to the first abutting end surface 13 on the inner surface thereof, and the locking convex portion 16 has a locking end surface 16A that contacts the groove bottom surface 15A. Have. As a result, a force is applied from the direction intersecting the circumferential direction of the main body part 11 (vertical direction in FIG. 8), and is locked in the direction intersecting the circumferential direction of the main body part 11, that is, the direction along the butted end surfaces 13 and 14. Even when the engagement between the convex portion 16 and the locking groove 15 is about to be released, the locking convex portion 16 is disengaged from the locking groove 15 by engaging the groove bottom surface 15A with the locking end surface 16A. It can be regulated so that there is no.

  In particular, in the present embodiment, the main body portion 11 has the retaining piece 18 that is partly separated from the main body substrate 12 by the slit 17. Therefore, when the body substrate 12 is bent into a cylindrical shape, the retaining piece It is difficult to make 18 follow the bending of the main body substrate 12 and bend it into an arc shape. For this reason, in the area | region close | similar to the retaining piece 18 in the main body board | substrate 12, ie, the area | region close | similar to the 2nd butting end surface 14 rather than the center position of the 1st butting end surface 13 and the 2nd butting end surface 14, the main body board | substrate 12 is cylindrical. Residual stress generated by bending to a relatively large value. On the other hand, a structure that causes a large residual stress is not arranged in the opposite region. For this reason, when a force is applied from the direction intersecting the circumferential direction of the main body 11, the engagement disposed near the region where the retaining piece 18 is disposed in the retaining groove 15 and the retaining protrusion 16. The stop convex portion 16 is likely to be detached from the locking groove 15 toward the outside of the main body portion 11 (upper side in FIG. 8).

  Therefore, in the present embodiment, the locking end surface 16A disposed close to the retaining piece 18 enters the inner peripheral surface side of the main body 11 with respect to the groove bottom surface 15A. According to such a configuration, the groove bottom surface 15 </ b> A presses the locking end surface 16 </ b> A toward the inside of the main body 11. That is, since the inner wall surface of the locking groove 15 presses the locking convex portion 16 that is easily detached toward the outside of the main body portion 11 toward the inner side, the main body portion 11 is effectively restricted from being deformed. be able to.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) According to the above embodiment, the terminal fitting 10 is an outer conductor terminal for the high-frequency connector 1, but the terminal fitting may be a different type of terminal fitting.

(2) In the above embodiment, the groove bottom surface 15A is the first inclined surface and the locking end surface 16A is the second inclined surface. However, the first inclined surface is disposed on the groove side surface, and the locking side surface is the first inclined surface. Two inclined surfaces may be arranged.

(3) In the said embodiment, although the main-body part 11 was cylindrical, the main-body part may be a cylinder with a polygonal cross section.

(4) The inclination directions of the first inclined surface and the second inclined surface are not limited to those in the above-described embodiment, and may be arbitrarily determined in consideration of the shape of other components arranged in the main body.

DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting 11 ... Main-body part 12 ... Main-body board | substrate 13 ... 1st abutting end surface (one abutting end surface)
14 ... 2nd butting end surface (the other butting end surface)
15 ... Locking groove 15A ... Groove bottom surface (first inclined surface)
16: Locking convex portion 16A: Locking end surface (locking surface, second inclined surface)
18 ... Stopping piece (separation part)

Claims (3)

A terminal fitting having a cylindrical main body,
The main body part is a plate-shaped main body substrate having a pair of butted end faces parallel to each other at both ends, and is a portion that is cylindrical with the pair of butted end faces being butted against each other,
Of the pair of butted end surfaces, one butted end surface has a locking groove that is recessed with respect to the one butted end surface and widens as the distance from the one butted end surface increases, and the other butted end surface has the locking A protrusion that fits into the groove, the protrusion protruding from the other butting end surface, and having a locking protrusion that widens as the distance from the other butting end surface increases.
The locking groove has a first inclined surface that is inclined with respect to the abutting end surface on an inner wall surface thereof, and the locking convex portion comes into contact with the first inclined surface to thereby form the first inclined surface. The terminal metal fitting which has the 2nd inclined surface latched on.   The locking groove has a groove bottom surface extending in parallel with the one butting end surface, and the locking projection has a locking surface extending in parallel with the other butting end surface; The terminal fitting according to claim 1, wherein the first inclined surface is disposed on the groove bottom surface, and the second inclined surface is disposed on the locking surface. The main body portion has a separation part partially separated from the main body substrate;
Of the first inclined surface and the second inclined surface, one inclined surface arranged close to the separation portion is inclined so as to enter the inner peripheral surface side of the main body part with respect to the other inclined surface. The terminal fitting according to claim 1, wherein the terminal fitting is provided.

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