JPS607015Y2 - Terminal strip of terminal board - Google Patents

Description

[Detailed description of the invention] This invention relates to a terminal piece of a terminal board suitable for use in terminal boxes of communication cables, etc. In particular, the plug holder of the terminal piece has a spring part with desired elasticity and firmness. The present invention relates to a terminal piece that maintains a stable and good connection state not only when a plug is inserted, but also against aging due to moisture, dust, etc., by providing a structure.

Generally, a communication cable is cut at the position of a terminal box provided in units of numbers, and both ends thereof are connected to opposing terminals of a terminal board housed inside the terminal box.

The terminal board has a structure in which the contact piece of the plug can be inserted, and normally one plug maintains a short circuit between one pair of terminals and forms a communication circuit for one line. Ru.

The communication line formed in this way can be easily separated at the terminal board by removing the plug, making it easy to test for abnormalities when inspecting cables for short circuits, cuts, etc. I can do it.

Figures 1 and 2 are partially cutaway views showing an example of the configuration of a terminal plate for multiple-pair cables using the terminal piece of this invention, with Figure 1 being a front view and Figure 2 being a right side view. It is.

In the drawing, 1 is the terminal board body, 1A is the hole for its installation, 1B is the insertion hole for the contact piece of the plug, IC is the groove for the installation of the terminal cover, 2A and 2B are the wrapping terminals, 3A and 3B
indicates a solder terminal.

The terminal board shown in FIGS. 1 and 2 is for a plurality of pairs of cables, for example, 10 pairs, and the terminal pieces are broadly classified into wrapping terminals and solder terminals.

In the case of a wrapping terminal, the four wires of the cable are connected by wrapping several times, and in the case of a solder terminal, the conductors of the cable are connected by soldering.

Generally, either wrapping terminals or solder terminals are used, but FIG. 1 shows a case where wrapping terminals 2A and 2B are arranged on the right side and solder terminals 3A and 3B1 are arranged on the left side.

The wrapping terminals and solder terminals are arranged at approximately equal intervals to ensure a distance between adjacent terminals so as to facilitate the connection work with the cable.

In addition, the plug insertion holes 1B are designed to ensure that four insertion holes, one pair of two pairs corresponding to one pair of cables, can be selected.
They are arranged close to each other to prevent incorrect connection with adjacent cables.

Therefore, for example, the positional relationship between the wrapping terminal portions of the wrapping terminals 2A and 2B and the corresponding plug insertion hole 1B is slightly shifted in the vertical direction with respect to the horizontal direction in FIG.

This relationship is exactly the same for solder terminals 3A and 3B.

In addition, when it is necessary to particularly protect these wrapping terminal parts and solder terminal parts, the mounting provided at the lower right side or lower left side of the terminal board body 1 in FIG. When attaching the cover, the left and right terminal sections can be stored inside the respective covers by inserting the sections.

Furthermore, various types of plugs that are inserted into the terminal boards shown in FIGS. 1 and 2 are already in use.

Figures 2 1 to 3 are diagrams showing the plug and the state in which the plug is attached to the terminal board. Figure 1 is a perspective view of the plug, Figure 2 is a front view showing the state in which it is attached to the terminal board, and Figure 3 is Figure 2. This is the equivalent circuit of

In the drawings, 4 indicates an insulating part of the plug, 5A and 5B contact pieces of the plug, and 6A and 6B and 7A and 7B each indicate a pair of adjacent cables.

As shown in FIG. 2, each plug has the function of forming a line between a pair of cables 6A and 6B or 7A and 7B. It is necessary to maintain good and stable contact with each terminal piece.

The terminal piece of the terminal board of this invention maintains good contact with the contact piece of the plug over a long period of time, and also allows the connection part with the cable, that is, the wrapping terminal part and the solder terminal part, to be maintained as desired. The purpose is to provide strength.

If we consider the structure of the terminal piece of the terminal board in detail, in terms of its function, it consists of three parts: a solder or wrapping terminal part, a terminal spring part, and a plug holder spring part.

Among these, the terminal spring part and the plug receiver are not clearly classified as the spring part, and a part of the terminal spring part and the plug receiver constitute the spring part.

The solder or wrapping terminal part requires appropriate strength for connection with the cable, so it needs to be 1 meter thick, for example. Half the thickness, about 0.5rIr, to obtain the required elasticity! It is made of brass plate etc.

Conventional terminal pieces are made, for example, by overlapping two symmetrically cut metal pieces and spot welding or caulking them together, or by folding a single cut metal piece around a central axis of symmetry and stacking them. They were also created together.

Figures 3 1 to 4 are diagrams explaining the structure of the terminal piece of a conventional solder terminal and its manufacturing method. Figure 1 shows the one made by spot welding and caulking, Figure 2 shows the one made by bending, and Figure 3 shows the one made by plugging. The receiver is a presser spring of the spring portion, and FIG. 4 shows the presser spring attached to the terminal piece of FIG. 2.

In the drawing, 8 and 9 are symmetrical metal pieces, 8A and 9A
8A and 9B are terminal spring parts, 10 is a metal piece, IOA is the solder terminal part, 10B is a terminal spring part, and 11 is a presser spring.

As shown in Fig. 3, if a terminal piece is formed by spot welding and caulking two metal pieces 8 and 9, the thickness of the terminal spring part 8B or 9B is half the thickness of the solder terminal parts 8A and 9A. It becomes thick.

However, metal corrosion is likely to occur in the spot welded parts, which causes poor continuity and increased resistance between the plug and the contact piece.

Furthermore, in the case of a terminal piece made by bending a single metal piece 10, as shown in FIG. If this happens, there is a risk of breakage at the bent portion, which also causes corrosion.

In addition, in the conventional terminal piece, as shown in FIG. 3, a presser spring 11 as shown in FIG. 3 is attached to the outside of the terminal spring portion 10B.
By attaching the plug holder, appropriate elasticity is imparted to the spring portion of the plug holder.

In this way, the terminal pieces of conventional terminal boards are made by spot welding or caulking two metal pieces as shown in Figure 3-1, or by bending a single metal piece as shown in Figure 3-2. It was produced by

Therefore, due to corrosion of welded parts and breakage of bent parts, etc.
Problems such as poor conduction between the plug and the contact piece and an increase in contact resistance occur.

As already explained, since the terminal board forms a communication circuit such as a telephone line by means of a plug, such poor conduction or increase in contact resistance value immediately results in line failure.

Therefore, the purpose of the terminal strip of the terminal board of this invention is to solve these disadvantages of conventional terminal strips, and to have a simple structure that does not cause poor conduction or increase in contact resistance.

To this end, in the terminal piece of this invention, the solder terminal or wrapping terminal is constructed from a single metal piece, eliminating the need for spot welding or caulking, and also eliminating the risk of breakage at the bent portion. , the plug holder is designed to provide the desired elasticity to the spring portion.

4. FIGS. 1 to 5 are diagrams illustrating the configuration of the terminal piece of this invention and its manufacturing method. FIG. 1 is a cut-out plan view of a wrapping terminal, FIG. 2 is a plan view of a solder terminal after processing, FIG. 3 shows its side view, and FIGS. 4 and 5 show its top view.

The symbols in the drawings are the same as those in FIGS. 1 to 3, and 1
2A is the wrapping terminal part, 12B is the terminal spring part, 12C
is the connection boundary.

The terminal piece of this invention has a terminal spring portion 12B shown in FIG.
The thickness of the wrapping terminal part 12A is cut to about half the thickness of the wrapping terminal part 12A, and the thickness of the connection boundary part 12C is made by cutting a single metal piece whose thickness is changed sequentially as shown in FIGS. 4 and 5. configured.

In addition, in the case of solder terminals, this wrapping terminal part l
Only the shape of 2A changes as shown in FIG. 42.

The method for manufacturing the metal piece having the shape shown in FIG. 4 is arbitrary.

Generally, for example, a single metal plate having a thickness of lTML is cut in advance so that the portions forming the terminal spring portion 12B and the connection boundary portion 12C have a predetermined thickness, and then die-cutting is performed. method is used.

Next, the metal piece cut out as shown in FIG.
At the center position of the terminal spring portion 12B indicated by the dotted chain line, as shown in FIG.
and 3, and the inner surface of the plug holder forms a spring part.

In the terminal piece of this invention, since the bent portion of the terminal spring portion 12B has a rounded U-shape, there is no risk of breakage or the like occurring at this portion.

Further, if necessary, a presser spring 11 may be attached to the plug receiver so that desired elasticity can be obtained in the spring portion.

Thereafter, the metal piece is bent in the vicinity of the connection boundary 12C as shown in FIGS. 4 and 5 so that the terminal spring portion corresponds to the position of the plug insertion hole IB in FIG. 1. .

By sequentially changing the thickness of the connection boundary portion 12C,
The elasticity of the terminal spring portion 12B is ensured, and such processing can be easily performed.

In addition, in the above embodiment, the case where the terminal piece of this invention is used in a terminal board housed in a terminal box for a communication cable or the like has been explained.

However, the terminal piece of this invention is not necessarily limited to such a terminal board, but can be applied to any terminal board having a terminal having a wrapping or solder terminal part and a plug holder having a spring part.

Further, the connection boundary portion 12C in FIG. 41 does not necessarily need to be bent as in FIGS. 4 and 5, and even in that case, it may be wrapped with a different thickness or a terminal spring connected to the solder terminal portion. The effect is that sufficient elasticity is ensured in the portion 12B.

In this way, the terminal piece of this invention can be modified in various ways.

As described above, in the terminal piece of the terminal spring part of this invention, the thickness of the substantially straight member forming the terminal spring part is approximately half the thickness of the solder or wrapping terminal part, and the thickness of the straight member forming the terminal spring part is approximately half that of the solder or wrapping terminal part. The solder or wrapping terminal part is formed vertically at a position slightly off the center in the longitudinal direction, and at the connection boundary between the straight member and the solder or wrapping terminal part, the length is at least as long as the thickness of the terminal part. Using a single piece of metal with varying thickness in different parts,
By bending the linear member forming the terminal spring portion at the center position in the longitudinal direction, the plug receiver forms the spring portion on its inner surface.

Therefore, according to the terminal piece of this invention, each terminal piece can be
Since it can be constructed from a single piece of metal, there is no need for spot welding or caulking, and since there is no part to bend strongly like in conventional bending processes, a good connection is maintained between the plug and the contact piece. be done.

Furthermore, many excellent practical effects can be obtained, such as being able to impart desired elasticity to the terminal spring portion.

[Brief explanation of the drawing]

Figures 1 and 2 are partial cross-sectional views showing an example of the configuration of a terminal board for multiple-pair cables using the terminal piece of this invention, and Figures 2 1 to 3 are plugs and plugs attached to the terminal board. Figures 1 to 4 are diagrams showing the installed state, and Figures 1 to 4 are diagrams explaining the configuration of the terminal piece of a conventional solder terminal and its manufacturing method.
5 is a diagram illustrating the structure of the terminal piece of this invention and its manufacturing method. FIG. 1 is a cut-out plan view of a wrapping terminal, FIG. 2 is a plan view of a solder terminal after processing, and FIG. 3 is a side view thereof. ,
Figures 4 and 5 show top views. In the figure, 1 is the terminal board body, 1B is the insertion hole for the contact piece of the plug, 2A and 2B are wrapping terminals, 3A and 3B are solder terminals, 4 is the insulating part of the plug, 5A and 5B are the contact pieces of the plug, 12A is a wrapping terminal portion, 12B is a terminal spring portion, and 12C is a connection boundary portion.

Claims (1)

[Scope of utility model registration request] The thickness of the substantially linear member forming the terminal spring portion is approximately half the thickness of the solder or wrapping terminal portion, and the linear member is perpendicular to a position slightly off the longitudinal center of the linear member. At the connection boundary with the solder or wrapping terminal portion formed in the direction, the metal piece is made of one metal piece whose thickness is sequentially changed at least in a length portion that is approximately the same as the thickness of the solder or wrapping terminal portion. A terminal piece of a terminal board, characterized in that the linear member forming the terminal spring part is bent at approximately the center position in the longitudinal direction, and the plug receiver forms the spring part on the inner surface thereof.