JPH0323663Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrical connector that can be passed through a through-hole terminal provided on a wiring board or the like.

[Conventional technology]

When connecting a conductor such as an electric wire to a terminal provided on a wiring board or the like, there is a method that uses a combination of a through-hole type terminal and a pin type connector as a means for attaching and detaching the conductor and ensuring positioning. In order to securely lock the pin-type connectors used in such cases to the terminals, various types of connectors with modified split pins as shown in Figures 4 and 5 are known. It is being

Such a connector needs to have reliable contact with the electrode portion provided on the inner surface of the through hole of the wiring board, and must not easily fall off once it is inserted and fitted into the through hole. However, in the case of the conventional connector as illustrated, the connection with the through hole of the board is achieved by a stopper b provided at the base of the fitting part a and a locking spring part c at the tip.
has been achieved between. When the connector is inserted into the through-hole d, the locking spring part c is bent and returns to its original state after passing through the through-hole d, but compared to the length of the locking spring part c. The large deflection caused the spring to flatten, weakening the board locking force, and causing looseness in the lock.

[Problem to be solved]

The present invention aims to provide a terminal structure that can maintain a high holding force and at the same time achieve reliable conduction when inserted into a through-hole type terminal of a board.

[Means for problem solving]

The purpose of the present invention as described above is to provide a conductor mounting part,
A fitting connection part consisting of two strip-shaped arms extending in parallel from the conductor attachment part so as to face each other and having their tips curved inward so as to come into contact with each other. In the electrical connector, the fitting connection portion is reached by a chevron-shaped locking protrusion on only one edge of each of the strip-shaped arms in opposite directions at the rear of the distal end thereof. It will be done.

An example of such an electrical connector of the present invention is shown in FIG. Reference numeral 1 designates a conductor attachment portion, which is provided with a conductor caulking arm 1a and a covering portion caulking arm 1b for attaching an end portion of an electric wire or the like. 1c is a locking portion to prevent rattling. 2 are mutually almost axially symmetrical 2
The fitting connection part is made up of two plate-like arms, and is provided extending in parallel from the side end of the conductor attachment part, which is formed by punching and bending a metal plate into a U shape, for example.

The base of the fitting connection part 2 is bent so that two strip-shaped arms approach each other to form a fitting stopper 2a. Further, the distal end portion 2b is tapered and slightly bent inward so that the distal inner edge 2c is in contact with the distal end portion 2b. Furthermore, a chevron-shaped locking protrusion 2d, 2d' is provided to protrude from one side edge of each strip-shaped arm a little rearward from the tip. This locking protrusion 2d is arranged upwardly on one arm and downwardly on the other arm, i.e. at the fitting connection 2d.
are provided at symmetrical positions about the central axis of.

The manner in which the electrical connector constructed as described above is inserted into the through-hole terminal of the wiring board is as shown in FIG. That is, a shows the state when the tip 2b is inserted into the through hole 3, the outer edge 2e of the strip-shaped arm is pushed slightly inward by the inner wall of the through hole, and the arm is mutually connected to the base 2a. Contacting tip edge 2c
It approaches while bending inward using the and as a fulcrum. b
shows the state when the rectangular arms are pushed in and the locking protrusions 2d, 2d' enter the through holes 3; one of the two arms is pushed downward and the other upward, and they are shifted vertically from each other. At the same time, they also receive twisting force and move closer to each other. Furthermore, when the state c is reached, the locking protrusions 2d and 2d' pass through the through hole 3, so the strip-like arms expand outward again and all of their outer edges 2e come into contact with the inner wall of the through hole 3. .

In the present invention, the fitting connection part 2 consisting of two strip-shaped parts is provided with locking protrusions 2d and 2d' only on one edge of each arm, and is locked when inserted into the through hole 3. The edge of the side edge with the protrusion 2d and the edge of the side edge without the locking protrusion come into contact with the inner surface of the through hole at the same time, causing deflection in the bending direction (i.e.
(b) deflection in the torsional direction (i.e., deflection in the torsional direction (i.e., the tip of the plate arm in the Y direction in FIG. 2 b) A cantilever-type deflection that causes the edges 2c to slide laterally relative to each other occurs at the same time, and deflection stresses are not concentrated on any part of the arm. Therefore, there is no problem of the arm becoming permanently deformed and sagging, and a reliable locking force is exerted.

Further, FIG. 3 shows another example of the electrical connector of the present invention. In this example, the positions of the locking protrusions 2d and 2d' are shifted back and forth, for example, one of the protrusions 2d
Even after passing through the hole, the other protrusion 2d' remains in the middle of the hole. Further, when the protrusion 2d' also passes through the through hole, it will be in the same locked state as in the previous example. In either case, reliable locking is achieved.

Therefore, when the electrical connector of this example is used, even if the thickness of the wiring board changes from X to Y, reliable connection can be made without any problem.

[Effect of idea]

The electrical connector of the present invention has a locking protrusion in a special position, so that no local stress is applied to the connection part when fitting it to a through-hole terminal such as a wiring board, and it is reliable. It is possible to achieve reliable connection and locking without increasing the production cost of the connector itself.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an electrical connector according to the present invention, and FIGS. 2 a to 2 f are diagrams illustrating how the same electrical connector is inserted and connected to a through-hole terminal. FIG. 3 is a side view of another example of the electrical connector according to the present invention. FIGS. 4 and 5 show examples of electrical connectors according to the prior art, where A is a perspective view and B is an explanatory view of the state of insertion into a through-hole type terminal. 1... Conductor connection part, 2... Fitting connection part, 2a...
...Fitting stopper, 2d, 2d'...locking protrusion.

Claims (1)

[Scope of utility model registration request] consisting of a conductor mounting part and two strip-shaped arms extending in parallel from the conductor mounting part so as to face each other, and whose tips are curved inward and are in contact with each other. The fitting connection portion is characterized in that the fitting connection portion is provided with chevron-shaped locking protrusions only on one side edge in opposite directions of each of the strip-shaped arms at the rear of the distal end. An electrical connector for connecting to the through-hole terminals of wiring boards, etc.