JPH0628787Y2 - Terminal block terminal fittings - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a terminal fitting fixed to the terminal block of the input / output terminals of various electronic devices such as a sequencer, and is made of deformable synthetic resin. A plurality of square holes formed in one or more rows on the terminal block are formed in a U shape and face each other 2
The present invention relates to a terminal fitting that is press-fitted while expanding two opposite surfaces of the square hole by the respective end surfaces of the respective surfaces.

[Conventional technology]

As this kind of terminal fitting, the one having the shape shown in FIG. 4 is conventionally known. In addition, this terminal fitting is press-fitted in FIG.
An example of the structure of the fixed terminal block is also shown. A plurality of square holes 2 are formed in two rows at different heights in a terminal block 1 made of deformable synthetic resin, and a terminal fitting 3 press-fitted into the square holes is formed in a U shape. With the opposite 2
Protrusions 4 are formed on both end surfaces of each surface. The projection 4 is formed so that the press-fitting end side of the terminal block into the square hole 2 is low, and the two inclined surfaces are used to spread the two opposite surfaces of the square hole 2 and press-fit into the square hole to be fixed to the terminal block 1. . The thin rods 5 extending downward on one of the two facing surfaces of the terminal fitting 3 are connecting portions connected to terminals of the printed board and other circuit elements, respectively.

The state in which the terminal fitting 3 is press-fitted and fixed to the terminal block 1 is shown in FIG. As mentioned above, fixing the terminal fittings to the terminal block
With the taper surface of the protrusion 4, push out the two opposite surfaces of the terminal block square hole,
This is done by producing a frictional force on the tapered surface by the reaction force of the terminal block based on the deformation amount of the square hole at this time.

[Problems to be solved by the device]

The problems with the structure of such a terminal fitting and the method of fixing it to the terminal block are as follows. That is, since the plurality of square holes formed in one row or a plurality of rows are all expanded by press fitting the terminal fittings, the deformation of the square holes due to the press fitting is integrated, and A of the terminal block 1 is in the A ′ direction and B is It has a drawback that it is deformed in the B'direction and the terminal block warps as shown by a broken line.

An object of the present invention is to provide a structure of a terminal fitting that can be fixed to a terminal block having a conventional structure without causing deformation of the terminal block while maintaining the conventional basic structure of the terminal fitting and the fixing method to the terminal block. Is.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, according to the present invention, a plurality of terminal blocks made of a deformable synthetic resin are arranged in parallel, and the square holes formed in one row or a plurality of rows are formed in a U shape. The two surfaces facing each other in the column direction of the square holes are inserted into the square holes from the tip ends of the two leg pieces, and the two surfaces facing each other in the row direction of the square holes are provided by the protrusions provided at both ends of the two leg pieces and projecting toward the two surfaces facing the row direction of the square holes. In a terminal fitting fixed by being pressed in while being spread out, the projections provided on both leg pieces of the terminal fitting have two surfaces whose end faces projecting toward the two facing surfaces of the square hole are opposite to each other in the column direction of the square hole. It is assumed that the structure is formed in a wedge shape that narrows in the direction in which the side is widened.

[Action]

The present invention focuses on the fact that the deformation of the terminal block is caused by the deformation of the square hole due to the press-fitting of the terminal fitting, and therefore the deformation of the terminal block can be avoided by reducing the deformation amount. . Opposite 2 with conventional terminal fittings
The pressing surfaces of the projections at both ends of the surface are flat surfaces, and therefore the amount of deformation proportional to the product of the width of the pressing surface and the press-fitting margin and the amount of deformation of the square hole around the press-fitting site are added during press-fitting. Deformation occurs. This deformation is integrated for each square hole, resulting in deformation of the terminal allowance. However, as in the present invention, the pressing surface of the protrusion is not a single plane perpendicular to the expanding direction, but is formed in a wedge shape in which the two surface sides facing in the column direction of the square holes are narrowed in the expanding direction. When press fitting, the square hole deforms like a wedge, and if the wedge shape is triangular, the amount of deformation will be 1/2 of the conventional size when the press fitting margin is the same, and the square hole around the press fitting part will also be deformed. Get smaller. Since the direction of deformation at this time has a component perpendicular to the longitudinal direction of the terminal block, the integrated value of the amount of deformation in the longitudinal direction of the terminal block for each square hole is significantly smaller than before, and the entire terminal block is The deformation of can be avoided. If the pressing surface of the protrusion is wedge-shaped, the reaction force from the terminal block due to the deformation of the square hole will be smaller than before and the frictional force will also be smaller, but the force required to prevent the terminal fitting from coming off is not so large. Therefore, the reaction force of the terminal block on the pressing surface only needs to be sufficient to prevent rattling of the terminal fittings, and the input / output terminals are sufficient for practical use without maintaining the frictional force of the past. Can be obtained.

〔Example〕

1 to 3 show an embodiment of the present invention. FIGS. 1 and 2 show the projection 4 in FIG. 4 in which the outer ridge is cut off in the longitudinal direction of the taper surface so that the projection is wedge-shaped in the direction perpendicular to the press-fitting direction. In FIG. 3, the ridges on both sides are cut off to form a wedge shape.

[Effect of device]

As described above, according to the present invention, a plurality of terminal blocks made of a deformable synthetic resin are juxtaposed side by side, and the square holes formed in one row or a plurality of rows are formed in a U-shape. Inserted into the square hole from the tip end side of the piece, and pushing the two surfaces facing each other in the row direction of the square holes by the projections provided at both ends of the leg pieces and projecting toward the two surfaces facing the row direction of the square hole. In the terminal fitting that is fixed by being pressed in while unfolding, the projections provided on both leg pieces of the terminal fitting are such that the end faces protruding toward the opposite two surface sides of the square holes are the two surface sides facing in the column direction of the square holes. Since the structure is formed in a wedge shape that narrows in the direction of pushing out, (1) The amount of deformation on the side of the square hole when the terminal metal fitting is pressed into the square hole is significantly smaller than before, and the direction of deformation Also has a component perpendicular to the longitudinal direction of the terminal block, so the amount of deformation in the longitudinal direction of the terminal block is integrated. Since the value becomes extremely small and the deformation of the entire terminal block can be avoided, it is possible to improve the manufacturing yield of the input / output terminals and improve the quality of the terminal block based on the reduction of the deformation amount.

(2) Since both ends of each of the two facing surfaces of the terminal fitting are wedge-shaped to facilitate press-fitting, it is possible to form the terminal block into a desired shape without paying attention to rigidity, which facilitates designing. Become.

(3) It becomes easy to form a terminal block with a uniform thickness to prevent deformation after molding, which is a point to be noted when designing a synthetic resin molded product.

For example, large effects can be obtained in both manufacturing and design.

[Brief description of drawings]

1 is a perspective view of a terminal fitting according to an embodiment of the present invention, FIG. 2 is a plan view of the terminal fitting shown in FIG. 1, and FIG. 3 is a plan view showing a modification of the terminal fitting shown in FIG. FIG. 4 is an exploded perspective view showing a structure example of a conventional terminal fitting and a structure example of a terminal block into which the terminal fitting is press-fitted and fixed, and FIG. 5 shows a press-fitted state of the terminal fitting. , (A) is a plan view, and (b) is a front cross-sectional view as seen in the direction of the arrow at the XX position in FIG. 1 ... Terminal block, 2 ... Square hole, 3,6 ... Terminal metal fittings, 4,
7 ... Protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Norio Kobayashi No. 1-1 Shinden Tanabe, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (56) References 63-9774 (JP, U)

Claims (1)

[Scope of utility model registration request] Claims: 1. A plurality of terminal holes made of a deformable synthetic resin are arranged in parallel and formed in one or a plurality of rows of square holes. And fixed to both ends of the two leg pieces by press-fitting the two faces of the square holes facing each other in the row direction by press-fitting the protrusions protruding toward the two faces of the square holes facing each other in the column direction. In the terminal fitting, the projections provided on both leg pieces of the terminal fitting are wedge-shaped in which end faces projecting toward the opposite two surface sides of the square holes are narrowed in a direction to spread the two opposite surface sides facing the column direction of the square holes. The terminal fitting of the terminal block, which is characterized in that