JP4982394B2 - Electrical contact part structure of terminal fitting - Google Patents

Description

  The present invention relates to a structure of an electrical contact portion of a terminal fitting, and more particularly to a structure of an electrical contact portion having a substantially circular cross section or a substantially rectangular cross section.

  In FIG. 3, the female terminal fitting 1 includes an electric contact portion 2 into which a tab-like electric contact portion of a male terminal fitting (not shown) that is a connection partner is inserted and an electrical connection is made, and the electric contact portion 2. It has the electric wire connection part 3 connected to the electric wire terminal which is not shown in figure continuously. The female terminal fitting 1 is formed into a shape as shown in the figure by blanking a conductive metal plate into a predetermined shape and then bending (pressing) a plurality of times.

  The electrical connection portion 2 is formed in a rectangular cross section. The electrical contact portion 2 in the figure is formed so that a joint 4 is formed at the position of the upper wall. The upper wall is constituted by two upper half plates 5.

The electrical connection portion 2 forms a pair of lag portions 7 on the spring contact portion 6 inserted therein, and engages the lag portions 7 with the lag engagement holes 9 of the side wall 8 to thereby form the seam 4. Separation can be prevented.
JP-A-9-180795

  In the above prior art, it is necessary to separately provide the spring contact portion 6 having the pair of lag portions 7, or to bend the lag portion 7 to be engaged with the side wall 8. As a matter of course, there is a problem that the press die for bending is complicated as well as increasing the number of points. In the case of FIG. 3, the electrical connection portion 2 has a rectangular cross section. However, when the electrical connection portion 2 is formed to have a substantially circular cross section, it seems that the press die becomes more complicated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electrical contact portion structure of a terminal metal fitting that can prevent the separation of a joint without using a complicated press die.

  The electrical contact portion structure of the terminal fitting of the present invention according to claim 1, which has been made to solve the above-mentioned problems, blanks a conductive metal plate into a predetermined shape and performs bending several times to obtain a substantially circular cross section. In the structure related to the electrical contact portion of the terminal fitting formed with an electrical contact portion having a substantially rectangular shape or cross-section, the shape in a state before the final bending is formed with the outer C surface and the first at the one end. After having a tip end surface and a shape having an inner C surface and a second tip end surface at the other end, and applying a final bending process to wrap the outer C surface and the inner C surface so as to overlap, When the outer C surface and the inner C surface are slidably pressed and the tip position is changed, a butted state is formed in which the first tip matching surface and the second tip matching surface are pressed against each other. Special It is set to.

  According to the present invention having such characteristics, since the abutting state in which the first tip end mating surface and the second tip end mating surface are pressed against each other is formed, it is possible that the seam is separated. Absent. The bending process is simply a simple bending process such that the outer C surface and the inner C surface finally wrap, and after that, the outer C surface and the inner C surface may be slid in contact. .

  According to a second aspect of the present invention, there is provided an electric contact portion structure of a terminal fitting according to the first aspect of the invention, wherein the outer C surface and the inner C surface have a width corresponding to the amount of the wrap. It is characterized by forming.

  According to the present invention having such a feature, the outer C surface and the inner C surface reliably wrap, and the subsequent pressing is performed smoothly.

  According to a third aspect of the present invention, there is provided an electrical contact portion structure for a terminal fitting according to the present invention, wherein the terminal fitting electrical contact portion structure according to the first or second aspect is a shield connector terminal fitting or an electrical connector female terminal. It is a metal fitting.

  According to the present invention having such a feature, the above structure is adopted for the terminal fitting for shield connector or the female terminal fitting for electrical connector.

  According to the present invention described in claim 1, since the first tip end mating surface and the second tip end mating surface are pressed against each other and form an abutting state in which they always press against each other, the structure is complicated. There is an effect that the separation of the joints can be prevented without using a press die. Moreover, according to this invention, there exists an effect that the structure of the electrical contact part with sufficient manufacturability can be provided.

  According to the second aspect of the present invention, since the outer C surface and the inner C surface are securely wrapped, the abutting state can be smoothly formed.

  According to the third aspect of the present invention, the terminal metal fitting for shielded connector or the female terminal metal fitting for electric connector having good manufacturability as described above is obtained. In this case, there is also an effect that the noise resistance can be improved.

  Hereinafter, description will be given with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an embodiment of an electric contact portion structure of a terminal metal fitting according to the present invention, where (a) is a cross-sectional view of a blank state, and (b) is before final bending. Sectional drawing of the shape which will be in a state, (c) is sectional drawing of the shape which will be in the state after the last bending process, (d) is sectional drawing of the state after being pushed in, and an electrical contact part.

  In FIG.1 (d), the reference symbol 21 has shown the electrical contact part of the terminal metal fitting. The electrical contact portion 21 is formed in a substantially round shape in cross section by performing bending processing a plurality of times and by pushing in later. Hereinafter, formation of the electrical contact portion 21 having a substantially round cross section will be described. In addition, about parts other than the electrical contact part 21, it shall be the same as a well-known structure, and shall abbreviate | omit description. In addition to the substantially circular cross section, there is a case where the cross section is substantially rectangular. However, the formation is basically the same, and the description is omitted here.

  First, as shown in FIG. 1A, a flat metal plate having conductivity is blanked into a predetermined shape to form a blank state shape 22. The blank state shape 22 is formed to have an outer C surface 24 and a first front end mating surface 25 at one end 23 and an inner C surface 27 and a second front end mating surface 28 at the other end 26. Has been. The outer C surface 24 is formed as a tapered surface facing outward after the final bending process. Similarly, the inner C surface 27 is formed as a tapered surface facing inward.

  The blank state shape 22 is such that the lower surface 29 becomes the outer surface of the electric contact portion after the final bending process, and the upper surface 30 becomes the inner surface of the electric contact portion after the final bending process. The first tip alignment surface 25 is formed so as to be orthogonal to the upper surface 30. On the other hand, the second tip end face 28 is formed so as to be orthogonal to the lower face 29. The outer C surface 24 is formed on the side where the lower surface 29 intersects with the first tip mating surface 25. The inner C surface 27 is formed on the side where the upper surface 30 and the second tip mating surface 28 intersect. The outer C surface 24 and the inner C surface 27 are formed with a width that matches the lap amount L (see FIG. 1C) in the final bending process.

  Next, the blank state shape 22 is bent to form a final pre-bending state shape 31 that is substantially U-shaped as shown in FIG. The state shape 31 before final bending is formed such that the outer C surface 24 of one tip 23 faces outward and the inner C surface 27 of the other tip 26 faces inward. Further, the first tip alignment surface 25 and the second tip alignment surface 28 of the one tip 23 and the other tip 26 are formed so as to face upward. Furthermore, it is formed so that the middle is curved with a predetermined curvature.

  Subsequently, the final bend state shape 31 is subjected to final bending to form a final bend state shape 32 having a substantially round shape as shown in FIG. The state shape 32 after final bending is formed in a wrapped state such that the outer C surface 24 and the inner C surface 27 overlap. The state shape 32 after final bending is formed such that the other tip 26 is positioned above the one tip 23.

  Note that the lap amount L, which is the distance between the first tip end mating surface 25 and the second tip end mating surface 28, matches the widths of the outer C surface 24 and the inner C surface 27 as described above, but is not limited thereto. To do. For example, it is only necessary to wrap a part of the outer C surface 24 and the inner C surface 27, and it is also possible to set a larger value than the wrap amount L. In addition, in the state shape 32 after final bending, the outer C surface 24 and the inner C surface 27 may be in contact or non-contact.

  Finally, the other tip 26 of the state shape 32 after the final bending process is pushed downward to form an electrical contact portion 21 having a substantially round cross section as shown in FIG. When the other tip 26 is pushed downward and the outer C surface 24 and the inner C surface 27 are slidably contacted to change the tip position, the first tip alignment surface 25 and the second tip alignment surface 28 are pressed against each other (the direction of the arrow). The abutting state is formed such that the electrical contact portion 21 is formed.

  The electrical contact portion 21 is in a butting state in which the first tip end mating surface 25 and the second tip end mating surface 28 are pressed against each other and are always pressed against each other, so that the joint 33 is not separated. The bending process is simply a simple bending process such that the outer C surface 24 and the inner C surface 27 eventually wrap, and then the pushing operation is performed such that the outer C surface 24 and the inner C surface 27 are in sliding contact with each other. Therefore, the electrical contact portion 21 with good manufacturability is obtained.

  A terminal fitting for a shield connector to which the structure of the present invention is applied will be briefly described with reference to FIG. FIG. 2 is a perspective view of a terminal fitting for a shield connector.

  In FIG. 2, a shield connector (coaxial connector) 42 provided at the end of the coaxial cable 41 includes an inner terminal (inner conductor terminal) (not shown) connected to the core wire 43 of the coaxial cable 41 and a dielectric into which the inner terminal is inserted. 44 and a shield terminal 46 which is provided outside the dielectric other 44 and contacts the braid 45 of the coaxial cable 41. The braid 45 is provided between the insulator 47 and the insulating sheath 48.

  The shield terminal 46 has an electrical contact portion 49 that is electrically connected to a counterpart (not shown), and the seam 50 portion of the electrical contact portion 49 presses against each other as described in FIG. And it forms in the butt | matching state which always presses.

  Since the seam 50 is not separated, the shield terminal 46 is formed in a state that contributes to improvement in noise resistance.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

It is typical sectional drawing which shows one Embodiment of the electrical-contact part structure of the terminal metal fitting of this invention, (a) is sectional drawing of the shape used as a blank state, (b) is in the state before the last bending process. Sectional drawing of shape, (c) is a sectional view of a shape that is in a state after the final bending process, and (d) is a sectional view of a shape that is in a state after being pushed in and an electrical contact portion. It is a perspective view of the terminal metal fitting for shield connectors to which the structure of the present invention is applied. It is a perspective view of the terminal metal fitting of a prior art example.

Explanation of symbols

21 Electrical contact portion 22 Blank state shape 23 One tip 24 Outer C surface 25 First tip mating surface 26 Other tip 27 Inner C surface 28 Second tip mating surface 29 Lower surface 30 Upper surface 31 Before final bending State shape 32 State shape after final bending process 33 Seam 41 Coaxial cable 42 Shield connector 43 Core wire 44 Dielectric 45 Braided 46 Shield terminal (terminal fitting)
47 Insulator 48 Insulating sheath 49 Electrical contact 50 Seam

Claims (3)

A structure related to the electrical contact portion of the terminal fitting formed by blanking a conductive metal plate into a predetermined shape and bending it multiple times to form an electrical contact portion having a substantially circular cross section or a substantially rectangular cross section. In
The shape in a state before the final bending process is a shape having an outer C surface and a first tip mating surface at one tip, and an inner C surface and a second tip mating surface at the other tip,
When the outer C surface and the inner C surface are overlapped with each other after final bending, the first C position is changed by pressing the outer C surface and the inner C surface into sliding contact. An electrical contact portion structure of a terminal fitting, wherein a butted state is formed such that the tip end mating surface and the second tip end mating surface are pressed against each other. In the electric contact part structure of the terminal metal fitting according to claim 1,
The outer contact C surface and the inner C surface are formed with a width corresponding to the amount of the wrap. In the electrical contact part structure of the terminal metal fitting according to claim 1 or claim 2,
An electric contact part structure of a terminal fitting, wherein the terminal fitting is for a shield connector or a female terminal fitting for an electrical connector.

Images