JP3069753U - Wire connection terminal - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a connection terminal capable of reducing costs and superposing an electrical connection state by superposing two pieces having the same shape. SOLUTION: Two pieces of the same shape stamped and formed into a shape symmetrical with respect to an imaginary plane perpendicular to the metal plate from one metal plate are superimposed on each other, and these two pieces are overlapped. In the superposed state, two recesses into which two wires of a predetermined thickness can be inserted are formed symmetrically with respect to the vertical plane, and the two wires inserted into the recesses are formed. The section is mechanically gripped by the spring action of the section, and the two electric wires are electrically connected to each other via the section.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is used for communication line connection. The present invention is used for connecting junctions, connecting to equipment, and so on. The present invention relates to a terminal structure for stably connecting copper wires one by one covered with a plastic insulating material for a long period of time.

[0002]

[Prior art]

 As a communication cable, a multi-pair cable including a large number of copper wires one by one covered with a plastic insulating material is widely used to construct a communication line. This multi-pair cable needs to be interconnected with a cable having a smaller number of logs at the junction and at the start and end points, it is necessary to connect to the intra-office equipment and the in-house equipment. Not only a multi-pair cable, but also a pair of wires may be connected. In the case of a ground wire, a single wire may be connected. Connection terminals are used for such connection.

Conventionally, soldering connections, screw connections, lapping connections, and the like have been used as connection terminal structures for this purpose. These connections require tools, respectively, and require a work for connection. The man-hour is large. For this reason, clamp connections have been used. This is because a spring structure is provided inside the connection terminal, the end of the wire is stripped, and the copper wire is simply inserted into the spring structure to connect the wire electrically and mechanically. Structure. By using such connection terminals, the number of work steps for connecting a large number of pairs of wires has been significantly reduced.

[0004] The structure of such a connection terminal that is currently used includes an electric wire gripping piece made of a leaf spring formed so as to apply a strong contact pressure to an electric wire to be connected, and an electric wire holding the electric wire gripping piece. And two metal members of a metal frame for electrical connection. These two metal members need to be formed using dedicated assembling equipment. This has a significant effect on manufacturing costs, and the accuracy of assembly between the two metal members is an important factor in maintaining stable contact. In addition, a device using two metal members necessarily has a large occupied space, and there is a limit in meeting a demand for downsizing a terminal.

To improve this, there is an attempt to configure a connection terminal using one metal member instead of two metal members (Japanese Patent Laid-Open No. 4-230967). In this method, one plate-shaped metal spring material is bent into a stub and loaded into a housing formed of an insulating material so as to be pushed into the housing. In this structure, the tip of the electric wire is mechanically grasped by utilizing the spring force generated between both ends of the plate-shaped metal spring material, and the electrical contact state between the metal spring material and the electric wire is determined. It is structured to maintain.

[0006]

[Problems to be solved by the invention]

 The terminal structure of the conventional example disclosed in the above publication has one metal spring member, and thus has advantages such as a low manufacturing cost, a small number of assembling steps, and a small occupied space. However, it was found that there was a problem in maintaining a constant electrical connection state under various conditions. In other words, in this conventional structure, the electric wire is held down by using the spring force generated between both ends of a single leaf spring. Therefore, when a slight vibration is applied, the spring force fluctuates and the connection state is changed. Fluctuates. That is, it was found that chattering occurred. In particular, in this structure, the spring vibrates to generate a large chatter in response to the vibration of the portion acting as the metal spring near the resonance frequency. This chattering involves an instantaneous interruption of the communication line and is not sufficient for use in high-speed digital communication lines. In a line to which direct current is applied, an arc is generated due to chattering, which changes the quality of the metal material, which may cause deterioration of a long-term connection state.

[0007] The present invention has been made in such a background, and by utilizing a single metal leaf spring, it is possible to reduce the cost while taking advantage of the advantage. An object is to provide a stable connection terminal. In other words, the present invention is a terminal structure that can be connected simply by stripping off and coating the end of the wire without requiring connection work such as soldering, screwing, or wrapping. It is another object of the present invention to provide an electric wire connection terminal whose manufacturing cost is low, its electric connection state is stable, and chattering does not occur against shock or vibration. An object of the present invention is to provide a stable connection terminal having a plurality of contact points between a leaf spring and an electric wire, each of which has a different resonance frequency. An object of the present invention is to provide a wire connection terminal that can reduce a mounting pitch when a plurality of devices are mounted and save space.

[0008]

[Means for Solving the Problems]

 The present invention relates to an electric wire connection terminal, and the feature of the present invention is that a single metal plate is formed by punching and forming the same shape symmetrically with respect to an imaginary plane perpendicular to the metal plate. The two pieces are overlapped in a belly-to-face relationship, and the two pieces have two recesses in which two electric wires having a predetermined thickness can be inserted between the two pieces in the overlapped state with respect to the vertical plane. The two wires inserted symmetrically and inserted into the recess are mechanically gripped by the spring action of the section, and the two wires are electrically connected to each other via the section. is there.

As described above, the two components are manufactured with the same material and the same shape, and the two are combined to form the wire connection terminal. Therefore, two members having different materials and different shapes are used. As a result, the production cost can be reduced as compared with the case in which

The sections are generally in the shape of the letter “D”, and the two pieces are mechanically connected to each other at a position corresponding to the vertical bar of the letter “D”, and the recesses are respectively formed in the “D” shape. It is desirable to have a configuration in which two electric wires penetrate the horizontal bar above and below the character, respectively.

[0011] Thus, since one electric wire is gripped at two places, it is possible to hold the electric wire firmly. Further, it is preferable that the natural vibration frequency of the concave portion provided in the upper horizontal bar as a spring is different from the natural vibration frequency of the concave portion provided in the lower horizontal bar as a spring. More specifically, it is desirable that the natural vibration frequencies of the two concave portions are designed so as not to be close enough to cause a resonance phenomenon, and to be independent natural vibration frequencies which are not related to the overtone frequency.

Thus, even if one of the recesses resonates with vibration applied from the outside, the other recess does not resonate with the vibration. In other words, even if one of the recesses resonates and interferes with the gripping of the electric wire, and a failure such as an instantaneous interruption of current occurs, the electric wire can be reliably gripped in the other concave portion. Therefore, inconveniences such as instantaneous interruption of current can be avoided for the entire wire connection terminal.

[0013] Two claws and two receiving holes are formed diagonally at positions corresponding to the vertical bars of the letter "D", and the structure that is mechanically coupled to each other is formed by the claws and the receiving holes. It is desirable to use a pawl structure. Thus, the two components can be assembled by a simple assembling process.

[0014] The concave portion provided in the horizontal bar above the letter "D" has a diameter of an opening formed between the two pieces at an upper portion larger than the predetermined thickness and at a lower portion, the predetermined thickness. It is desirable to be formed smaller than this. That is, it is desirable that the wire be formed so as to be at an acute angle with respect to the drawing direction of the inserted electric wire.

[0015] Thus, the wire can be firmly gripped against the force of pulling out the inserted wire in the direction opposite to the insertion direction. Therefore, when the electric wire is pulled out, it is desirable to provide a mechanism such as a release button for pushing and expanding the concave portion formed by the two pieces.

It is preferable that a bent portion for giving elasticity to the inserted two electric wires is formed at a base position of the upper and lower horizontal bars of the “D” character with respect to the vertical bar. This can prevent the gripping force of the electric wire from deteriorating even if the electric wire is repeatedly pulled out and inserted.

[0017] At the lower end of the vertical bar of the letter "D", there are formed legs for attaching the overlapped two pieces to other parts or for applying an external potential to the pieces. Is desirable.

[0018]

[Embodiment of the invention]

 An electric wire connection terminal according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the wire connection terminal of the embodiment of the present invention. FIG. 2 is a diagram showing two pieces punched from a metal plate. FIG. 3 is a diagram showing the first concave portion.

The present invention is an electric wire connection terminal, and the feature of the present invention is that, as shown in FIG. 2, a single metal plate 50 is symmetrical with respect to a vertical plane imaginary to the metal plate. Two pieces 40 of the same shape stamped and formed into a shape are provided with irregularities by press working, and then superimposed on each other as shown in FIG. 1. Are formed symmetrically with respect to the vertical plane, into which two electric wires 20 having a predetermined thickness can be inserted, and the two electric wires inserted into the concave portions 1 and 2 are formed. 20 is mechanically gripped by the spring action of the section, and the two electric wires 20 are electrically connected to each other via the section.

As shown in FIG. 2, the section 40 is substantially in the shape of the letter “D”, and the two pieces 40 are mechanically connected to each other at a position corresponding to the vertical bar of the letter “D”. , Recesses 1 and 2 are provided such that two electric wires 20 pass through the upper and lower horizontal bars of the letter "D", respectively.

Two claws 31 and two receiving holes 30 are formed diagonally at a position corresponding to the vertical bar of the letter “D”, and the structure that is mechanically coupled to each other is formed by the claws 31. Depends on the pawl structure with the receiving hole 30.

As shown in FIGS. 3A and 3B, the concave portion 1 provided in the horizontal bar above the letter “D” has a diameter of an opening formed between two pieces 40 as shown in FIGS. The upper portion is formed larger than the predetermined thickness, and the lower portion is formed smaller than the predetermined thickness. The wire 20 is formed so as to be at an acute angle with respect to the drawing direction of the inserted electric wire 20.

The recess 1 has a mortar-like shape in which the electric wire 20 to be inserted is always guided to the center, and has a structure in which all the insertion force of the electric wire 20 can be concentrated in the center. Thus, even a small-diameter electric wire 20 having low strength can be inserted without buckling.

Further, since the lower portion of the concave portion 1 is formed smaller than the predetermined thickness, even if an oxide film or the like is formed on the surface of the core wire of the electric wire 20, the oxide film is removed and a good contact state is obtained. Obtainable. Furthermore, as shown by arrows in FIG. 3B, by having four contact points, a reliable contact state can be obtained.

A bent portion 3 for giving elasticity to the inserted two electric wires 20 is formed at the base of the upper and lower horizontal bars of the “D” character with respect to the vertical bar.

At the lower end of the vertical bar of the letter “D”, a projection 4 is formed for attaching the two overlapped pieces 40 to another part or for applying an electric potential to the pieces from outside. Is done.

FIG. 4 is a diagram showing the mounting state of the wire connection terminal of the present invention as viewed from above. The wire connection terminal of the present invention is characterized by a simple structure in which two flat components of the same component are overlapped and nailed, and the connection mechanism is made thin, making use of this feature. When configuring the board, as shown in FIG. 4, the mounting pitch of the terminal units can be reduced, which is suitable for space saving.

FIG. 5 is a diagram showing the pressing direction of the concave portions 1 and 2. The electric wire connection terminal of the present invention can press and hold the electric wire 20 from both directions. Moreover, since the wire 20 is gripped by both the portion of the recess 1 that grips the wire 20 (shown as A) and the portion of the recess 2 that grips the wire 20 (shown as B), the wire 20 is Vibration given by the device can be absorbed by the portion A and the portion B, and rebound chatter can be avoided.

Further, the natural vibration frequency of the concave portion 1 as a spring is different from the natural vibration frequency of the concave portion 2 as a spring. This is achieved because the width of the two horizontal bars in the letter "D" is different from each other. The natural vibration frequencies of the two concave portions 1 and 2 are designed so as not to be close enough to cause a resonance phenomenon, and to be independent natural vibration frequencies which are not related to the overtone frequency.

Thus, even when one of the recesses 1 or 2 resonates with vibration applied from the outside, the other recess 2 or 1 does not resonate with the vibration. Even if the concave portion 1 or 2 resonates and hinders the gripping of the electric wire 20 and causes a failure such as a momentary interruption of current, the other concave portion 2 or 1 can reliably grip the electric wire 20 continuously. it can. Therefore, inconveniences such as instantaneous interruption of current can be avoided for the entire wire connection terminal.

FIG. 6 is a front view of a state in which the wire connection terminal according to the embodiment of the present invention is mounted on the housing. FIG. 7 is a perspective sectional view showing a state where the wire connection terminal according to the embodiment of the present invention is mounted on the housing.

A release button 11 is mounted on the upper part of the housing 10, and the Y-shaped portion provided adjacent to the concave portion 1 of the electric wire connection terminal is expanded by pressing the release button 11, whereby the electric wire 20 is expanded. Can be released from the gripping by the part A. It is convenient to provide a release button if there is a possibility of changing the connection of the electric wire.

[0033]

[Effect of the invention]

 As described above, according to the present invention, two metal leaf springs are used. However, this uses the same kind of metal leaf spring, and the material and processing are the same. As a result, the cost can be reduced. In addition, a stable connection terminal in an electrically connected state can be realized. Furthermore, the mounting pitch when a plurality of components are mounted can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric wire connection terminal according to an embodiment of the present invention.

FIG. 2 is a diagram showing two pieces stamped from a metal plate.

FIG. 3 is a view showing a first concave portion.

FIG. 4 is a view of the mounting state of the wire connection terminal of the present invention as viewed from above.

FIG. 5 is a diagram illustrating a pressing direction of first and second concave portions.

FIG. 6 is a front view of a state where the electric wire connection terminal of the present invention is mounted on a housing.

FIG. 7 is a perspective cross-sectional view of the electric wire connection terminal of the present invention mounted on a housing.

[Explanation of symbols]

 1, 2 concave portion 3 bent portion 4 projecting portion 10 housing 11 release button 20 electric wire 30 receiving hole 31 claw 40 piece 50 metal plate

Claims (8)

[Utility model registration claims] 1. Two pieces of the same shape stamped and formed in a shape symmetrical with respect to an imaginary vertical plane from one metal plate to the metal plate are superimposed on each other, and the two pieces are overlapped. In the superposed state, two recesses into which two wires of a predetermined thickness can be inserted are formed symmetrically with respect to the vertical plane, and the two wires inserted into the recesses are formed. A wire connection terminal characterized by mechanically grasping the two wires by a spring action of the piece and electrically connecting the two wires to each other via the piece. 2. The section is generally in the shape of the letter "D",
The two sections are mechanically connected to each other at a position corresponding to the vertical bar of the "D" character, and the recesses are respectively connected to the upper horizontal bar and the lower horizontal bar of the "D" character. The electric wire connection terminal according to claim 1, wherein the electric wire connection terminal is provided so as to penetrate. 3. The electric wire connection terminal according to claim 2, wherein a natural vibration frequency of said concave portion provided on said upper horizontal bar is different from a natural vibration frequency of said concave portion provided on said lower horizontal bar. 4. A structure in which two claws and two receiving holes are formed diagonally at positions corresponding to the vertical bar of the letter "D", and the structure which is mechanically coupled to each other is formed by the claws and the receiving holes. 3. The electric wire connection terminal according to claim 2, wherein the electric wire connection terminal has a claw stopper structure by a hole. 5. The recess provided in the horizontal bar above the letter "D", wherein the diameter of the opening formed between the two sections is larger at the upper part than the predetermined thickness, and is smaller at the lower part. The electric wire connection terminal according to claim 4, wherein the electric wire connection terminal is formed smaller than the thickness of the electric wire connection terminal. 6. The recess provided in the upper horizontal bar,
The electric wire connection terminal according to claim 5, further comprising a release button for temporarily reducing a pressing force generated on the inserted electric wire. 7. A bent portion for giving elasticity to the inserted two electric wires is formed at a position of a root of an upper and lower horizontal bar of the character "D" with respect to a vertical bar. Wire connection terminal as described. 8. The electric wire connection terminal according to claim 7, wherein a leg is formed at a lower end of the vertical bar of the letter "D".