JP3717998B2 - Connecting terminal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection terminal for fitting a flat-blade mating terminal into a rectangular tube-shaped terminal connection portion provided with a chevron-shaped flexible contact piece.
[0002]
[Prior art]
This type of conventional connection terminal is generally configured as shown in FIGS. 5 and 6, and a mountain-shaped flexible contact piece 2 is provided at the bottom of the rectangular tube-shaped terminal connection portion 1 to connect the terminal. A protruding piece 7 bent from the other side plate 6 is superposed on the recessed portion 5 of the top plate 4 bent horizontally from one side plate 3 of the part 1. When a mating terminal (not shown) is press-fitted into the terminal connection portion 1, the first contact portion 8 that is the lower wall of the recessed portion 5 comes into surface contact, and the second contact that is the top portion of the flexible contact piece 2. The part 9 is in line contact.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional example, the first contact portion 8 is in surface contact with the mating terminal, and the second contact portion 9 is in line contact, so that the first contact portion 8 having a particularly wide contact area is provided. Contact point is unclear. For this reason, there is a problem that the voltage drops when the terminal connection 1 or the counterpart terminal is oxidized and the current does not flow to the same contact.
[0004]
Further, since the first contact portion 8 is in surface contact with the mating terminal and the second contact portion 9 is in line contact, the friction between them is large and it is difficult to smoothly connect the mating terminal. It has become.
[0005]
The object of the present invention is to solve the above-mentioned problems, increase the rigidity, have a clear contact, can stably contact the counterpart terminal, and can smoothly receive the counterpart terminal. Is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the connection terminal according to the present invention includes a bottom plate, first and second side plates raised from both sides of the bottom plate, and ends of the top plate bent inward from the first side plate . by fitting from the second side plate in the formed recesses onto the edges overlapping the projecting piece which is bent inwardly, has a terminal connecting portion for preventing the opening of said side plates, the terminal in the connection portion In the connection terminal that accepts a flat-blade mating terminal by providing a flexible contact piece on the bottom plate side , the lower wall of the recess protruding into the terminal connection part is in surface contact with the upper surface side of the mating terminal. As the first contact portion, a second contact portion that makes point contact with the other side of the upper surface of the counterpart terminal is provided on the second side plate side of the top plate that is symmetrical to the first contact portion. a third contact portion for the lower surface to the point contact of the mating terminal to the top of the flexible contact piece provided, and the second contact portion Characterized in that a point contact position of the serial third contact portion in the same transverse plane.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 is a plan view of the embodiment, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a transverse sectional view. A terminal connecting portion 11 for connecting a flat blade-like insertion terminal (not shown) on the other side, and an electric wire (not shown) A core wire fixing portion 12 for fixing the core wire and a sheath fixing portion 13 for fixing the sheath of the electric wire are sequentially formed.
[0008]
The terminal connecting portion 11 is formed in a rectangular tube shape, side plates 15 and 16 are raised from both sides of the bottom plate 14, and a top plate 17 is bent inward from the side plate 16. For example, a dovetail-shaped depression 18 is formed on the top plate 17, and a projecting piece 19 bent from the side plate 15 is fitted onto the depression 18. This prevents the side plates 15 and 16 from being opened. The bottom of the recessed portion 18 is a first bulging portion 20 that bulges into the terminal connection portion 11, and the width of the bulging portion 20 is less than or equal to half of the top plate 17. The front and back side surfaces of the first bulging portion 20 are inverted trapezoids, and the lower surface is a flat surface parallel to the top plate 17. The front portion of the first bulging portion 20 is a guide portion 20a that guides the insertion terminal downward, and the rear portion of the guide portion 20a is a first contact portion 20b that makes surface contact with the insertion terminal. Yes.
[0009]
FIG. 4 is a cross-sectional view taken along the line AA in FIG. 1. The insertion terminal extends in the axial direction on the inner surface of the top plate 17 on the side of the first bulging portion 20. The 2nd bulging part 21 which contacts the upper surface of this is provided. The second bulging portion 21 has a strip shape, and its cross section has a semicircular shape. Further, the side surface of the second bulging portion 21 has an inverted mountain shape, the front portion is a guide portion 21a that guides the insertion terminal downward, and the top portion following the guide portion 21a makes point contact with the insertion terminal. It is set as the 2nd contact part 21b to do.
[0010]
Further, a mountain-shaped flexible contact piece 22 is provided on the lower side inside the terminal connection portion 11, and the bent portion 22 a at the front end of the flexible contact piece 22 is locked to the front end of the bottom plate 14 and then the bottom plate. 14 is pressed by a pressing piece 23 which is folded back from the end portion of 14. A third bulging portion 24 that contacts the lower surface of the insertion terminal is provided on the top of the flexible contact piece 22. The upper portion of the third bulging portion 24 is hemispherical, the front surface is a guide portion 24a that smoothly guides the insertion terminal, and the upper surface is a third contact portion 24b that makes point contact with the insertion terminal. It is said that. The second contact portion 21 b and the third contact portion 24b is provided so as to be positioned in the same transverse plane. Note that the bottom plate 14 bulges inward below the flexible contact piece 22, and a restricting portion 25 is formed to prevent excessive deformation of the flexible contact piece 22.
[0011]
With such a configuration, when the mating flat-blade insertion terminal is inserted into the terminal connection portion 11, each guide portion 20a, 21a, 24a guides the insertion terminal while the first, first, The insertion terminal is guided between the second contact portions 20b and 21b and the third contact portion 24b. At this time, the flexible contact piece 22 urges the insertion terminal upward by a resilient force, and the first contact portion 20b is in surface contact with the upper surface of the insertion terminal and the second contact portion 21b is in point contact. The third contact portion 24b makes point contact with the lower surface of the insertion terminal.
[0012]
Therefore, in this embodiment, the contact point with the insertion terminal is clarified, and the insertion terminal contacts the two points of the first contact portion 20b and the virtual contact point of the horizontal plane by the second contact portion 21b. This makes it possible to hold the insertion terminal in a stable posture.
[0013]
Further, by providing the second contact portion 21b and the third contact portion 24b in the same cross section, the contact portions 20b, 21b, and 24b press-contact the insertion terminal at three points in the same cross section to insert It is possible to stably hold the terminal, and further to ensure the stability of contact. Further, since the insertion terminal can be stably contacted at the same contact, even if the terminal connection portion 11 or the insertion terminal is oxidized, it is possible to avoid a voltage drop due to contact failure.
[0014]
Although the shape of the recessed portion 18 is pigeon-tailed, for example, it is possible to prevent the side plates 15 and 16 from opening by using a T-shape or any other shape and making the projecting piece 19 correspond to these shapes. . In the embodiment, the term point contact means contact with a certain area. Moreover, although the cross section of the lower part of the 2nd contact part 21b was made into the semicircle shape and the 3rd contact part 24b was made into the hemispherical shape, if it is a shape which can guide the insertion terminal well and can make point contact, other Any shape can be used.
[0015]
【The invention's effect】
As described above, the connection terminal according to the present invention increases the rigidity by preventing the top plate of the terminal connection portion from being opened, and the first contact portion is in surface contact with one side of the upper surface of the mating terminal, and the like. Since the second contact portion makes point contact with the side, and the third contact portion makes point contact with the lower surface of the mating terminal, the contact with the mating terminal becomes clear and the terminal is stably connected to the mating terminal. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment.
FIG. 2 is a longitudinal sectional view.
FIG. 3 is a cross-sectional view.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a longitudinal sectional view of a conventional example.
FIG. 6 is a cross-sectional view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Terminal connection part 17 Top plate 18 Depression recessed part 20b 1st contact part 21b 2nd contact part 22 Flexible contact piece 24b 3rd contact part

Claims (2)

A bottom plate, first and second side plates raised from both sides of the bottom plate, and an inner side from the second side plate on a recessed portion formed at an edge of the top plate bent inward from the first side plate A terminal connection part that prevents the side plates from opening each other by overlapping and fitting the bent projecting pieces into a flat blade shape by providing a flexible contact piece on the bottom plate side in the terminal connection part of the connecting terminal for receiving a mating terminal, a low wall of the recess which projects into the terminal connection portion to the first contact portion for the upper surface side to the surface contact of the mating terminals, the first of the top plate A second contact portion that makes point contact with the other side of the upper surface of the mating terminal is provided on the second side plate side that is symmetrical to the contact portion, and the lower surface of the mating terminal is provided on the top of the flexible contact piece. the provided third contact portion for point contact, providing a point contact position of said third contact portion and second contact portion in the same transverse plane Connection terminals, characterized in that. The connection terminal according to claim 1 , wherein a restriction portion is formed on the bottom plate in order to prevent excessive deformation of the flexible contact piece .

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