JPH0590836U - Connector terminal - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a connector terminal that is mounted on a connector of an electric circuit and used to connect conductors to each other, and a multi-pole in which a large number of terminals are accommodated by reducing terminal insertion force. An object is to provide a connector terminal used in a connector. [Structure] A plurality of elastic contact bodies 6 each having a mountain-shaped curvature and having conductivity are connected in parallel to one end of a connection portion 5 formed by bending a conductive plate body to form an electric contact portion 6c. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connector terminal which is mounted on a connector of an electric circuit and used for connecting conductors to each other.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, a connector for connecting conductors of an electric circuit has been used in which a male terminal is fitted to a female terminal provided with an elastic contact piece for electrical conduction. In recent years, there has been a demand for multi-pole connectors as circuit densities increase, but as the number of terminals accommodated in connectors increases, the insertion force for fitting the connectors together also increases, and the work of connecting connectors is increased. There are problems that make it difficult.

Generally, the contact resistance value between terminals is inversely proportional to the substantial contact area. Therefore, in order to reduce the contact resistance value, the elastic force of the elastic contact piece is increased to make the substantial contact area. It is necessary to increase the number, and it is difficult to reduce the insertion force when fitting the male terminal against the elastic force of the elastic contact piece, which is an obstacle to the multipolarization of the connector.

Therefore, a female terminal 1 with a low insertion force as shown in FIG. 8 has been proposed (Japanese Patent Laid-Open No. 62-216182). In the female terminal 1, a strip-shaped contact spring piece 3 made of one conductive plate is provided inside a cylindrical electric contact portion 2 made by bending a conductive plate. There is.

As shown in FIG. 9, the contact spring piece 3 has a top portion c formed by bending the central portion thereof into a dogleg shape, and the top portion c is a fulcrum for the tubular electric contact portion 2. As a seesaw is movably locked. When the male terminal 4 is inserted into the electrical contact portion 2 of the female terminal 1 as shown in FIG. 10, the tip of the male terminal 4 contacts the rear end portion b of the contact spring piece 3. Then, the rear end portion b is pushed up by the inclined front end portion of the male type terminal 4, the contact spring piece 3 makes a seesaw movement with the top portion c as a fulcrum, and its front end portion a presses the male type terminal 4 by the action of the lever. To do. On the other hand, the bottom surface of the electrical contact portion 2 is provided with a contact point d protruding toward the upper surface, and the male terminal 4 and the female terminal 1 finally have a contact point d as shown in FIG. Contact is made at three points a, b, and d.

However, in the case of the female terminal 1 as well, the contact resistance value between the terminals is inversely proportional to the actual contact area. Therefore, in order to reduce the contact resistance value, the elastic force of the contact spring piece 3 is reduced. Since it is necessary to increase the contact area by making it larger, the insertion force of the male terminal 4 is unavoidably increased, and the insertion force is insufficiently reduced when it is used in a multi-pole connector. It has problems such as trouble.

[0007]

[Problems to be solved by the device]

 The present invention has been made in view of the above problems, and it is an object of the present invention to provide a connector terminal used in a multi-pole connector that accommodates a large number of terminals by reducing the insertion force of the terminals.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, a plurality of elastic contact bodies having conductivity curved in a mountain shape are connected in parallel to one end of a connecting portion formed by bending a conductive plate body. It is characterized in that a contact portion is formed.

Further, as described in claim 2, a mountain-shaped curved elastic body is coupled to one end of the connecting portion formed by bending the conductive plate body, and a plurality of elastic bodies are formed on the outer surface of the elastic body. The conductors are attached in parallel to form a plurality of electrical contact portions.

[0010]

[Action]

 According to the present invention, since the plurality of elastic contact bodies or the plurality of electric contact portions provided on the elastic body respectively come into contact with the electric connection portions of the mating terminals to establish electrical conduction, the terminals are substantially connected to each other. The target contact area is increased, the total contact resistance value can be reduced without increasing the contact force, and the terminals can be fitted with each other with a low insertion force.

[0011]

【Example】

 FIG. 1 is a perspective view of a connector terminal A showing an embodiment of the present invention, and FIG. 2 is a side view thereof. The connector terminal A includes a plurality of elastic contact bodies 6 formed of a wire material made of beryllium copper as a highly elastic conductive material in parallel at a front end portion 5a of a connecting portion 5 formed by pressing a thin plate having high conductivity. , And the ends 6a are aligned and joined to the front end 5a by welding. On both rear edges of the connecting portion 5 to which the elastic contact body 6 is coupled, conductor holding portions 7 and 7 and covering caulking portions 8 and 8 continuous from the connecting portion 5 are provided in a protruding manner.

Each elastic contact member 6 is folded back to the lower side of the wire connecting portion 5 to form a bent portion 6b, and an electric contact portion 6c curved in a mountain shape is provided in the middle portion. FIG. 3 is an explanatory view of the method for manufacturing the connector terminal A, showing a step of sequentially feeding the conductive material 9 having the wire connection portion 5 formed in a chain to the processing step to continuously form the connector terminal A. Shows.

First, as shown in FIG. 3 (1), the connecting portion 5 provided with the conductor holding portions 7, 7 and the cover tightening portions 8, 8 is punched by press working. Reference numeral 10 is a lock hole. Next, as shown in FIG. 3B, the conductor holding portions 7 and 7 and the cover tightening portions 8 and 8 are bent to stand up. Next, as shown in FIG. 3 (3), a plurality of elastic contact bodies 6 are arranged in parallel at the front end portion 5a of the connection portion 5, and the respective end portions 6a are aligned and welded. Then, in the step of FIG. 3 (4), as shown in FIG. 2, the elastic contact body 6 having the welded end portion 6a is folded back to the lower side of the wire connection portion 5 to form a bent portion 6b and an electric contact portion curved in a chevron shape. After forming 6c, it is separated from the chain-like conductive material 9 to obtain the connector terminal A.

FIG. 4 is a cross-sectional view of the connector C using the connector terminal A, in which the conductor holding portions 7 and 7 and the cover crimping portions 8 and 8 are crimped in the male connector housing C 1 and the electric wire 11 Shows a state in which the connector terminal A to which is connected is accommodated and the connector terminal A is fitted to the female terminal 12 accommodated in the female connector housing C2.

When the connector terminal A is inserted into the female terminal 12, the plurality of elastic contact members 6 bend due to their elasticity, and the contact portions P and Q come into contact with each other to be electrically connected. Here, at the contact portion P, the plurality of elastic contact bodies 6 of the connector terminal A are independently in contact with the inner wall 12 a of the female terminal 12. Therefore, a plurality of contact portions corresponding to the number of the elastic contact bodies 6 are present, the contact area is substantially increased, and the contact resistance value of the entire terminal is reduced. That is, the contact force required to obtain a predetermined contact resistance value is reduced, and the terminal insertion force can be reduced.

The graph of FIG. 5 shows a change in the contact resistance value with respect to the contact force in the case where there is one contact point in the case where the terminals are in contact with each other, indicated by a solid line R based on the test results. For example, the contact force that makes the contact resistance value 0.3 mΩ is 400 g, as shown by S in FIG. 5, but in the case of the connector terminal A according to the present invention having four elastic contact bodies. The contact resistance value with a contact force of 50 g per wire is 1.0 mΩ per wire and 0.25 mΩ with four wires, as shown in T of FIG. Since the total contact force is 50g x 4 = 200g for four terminals, the contact resistance value is about half that of the conventional terminal, which is lower than that of the conventional terminal. Is obtained.

Next, a connector terminal B will be described as another embodiment of the present invention. As shown in FIG. 6, the connector terminal B has an elastic member at the front end portion 5 a of the connection portion 5 having the conductor holding portion 7 and the cover crimping portion 8 formed by press working similarly to the connector terminal A. An elastic body 13 formed of a thin plate of beryllium copper as a highly conductive material is bonded. Then, as shown in FIG. 7, a plurality of core wires 11a exposed by peeling off the insulating coating of the electric wire 11 are aligned on the elastic body 13, and the distal end portion 13a of the elastic body 13 is aligned with the distal end portion 11b of the core wire 11a. After welding and fixing, the elastic plate 13 is bent to form a bent portion 11c in which a plurality of core wires 11a are attached in parallel and an electric contact portion 11d curved in a chevron shape on the outer surface of the elastic body 13. There is.

The connector terminal B can be used as a connector terminal instead of the connector terminal A in the male connector housing C1 shown in FIG. 4, for example. In the connector terminal B, since the plurality of core wires 11a that use the conductor of high conductivity forming the electric wire 11 are in direct contact with the electrical contact portion of the mating terminal to perform electrical conduction, The resistance value can be reduced and the contact area can be increased by using a large number of core wires, so that the insertion force can be significantly reduced.

[0019]

[Effect of the device]

 According to the present invention, since the plurality of elastic contact bodies or the plurality of electric contact portions provided on the elastic body respectively come into contact with the electric contact portions of the mating terminals to establish electrical conduction, the terminals are substantially connected to each other. The contact area is increased and the total contact resistance value can be reduced without increasing the contact force between the terminals, and the terminals can be fitted with each other with a low insertion force. Work can be carried out smoothly and efficiently. Further, since the insertion force of each terminal is reduced, it has advantages such as being suitable for a multi-pole connector accommodating a large number of terminals.

[Brief description of drawings]

FIG. 1 is a perspective view of a connector terminal showing an embodiment of the present invention.

FIG. 2 is a side view of the connector terminal of FIG.

FIG. 3 is an explanatory view of a process of manufacturing the connector terminal of FIG.

4 is a cross-sectional view showing a fitted state of a connector using the connector terminal of FIG.

FIG. 5 is a graph showing a change in contact resistance value with respect to a contact force when the terminals are in contact with each other.

FIG. 6 is a side view of a connector terminal according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a state in which a plurality of conductors are attached to the elastic body of FIG.

FIG. 8 is a perspective view showing a conventional female terminal with low insertion force.

9 is a cross-sectional view showing the inside of the female terminal of FIG.

10 is an explanatory diagram of a process of inserting a male terminal into the female terminal of FIG.

FIG. 11 is an explanatory diagram showing a state in which insertion of male terminals into the female terminals of FIG. 8 has been completed.

[Explanation of symbols]

 A, B Connector terminal 5 Electric wire connecting portion 6 Elastic contact body 6c Electric contact portion 11c Core wire 11d Electric contact portion 13 Elastic body

Claims (2)

[Scope of utility model registration request] 1. An electric contact portion is formed by connecting a plurality of elastic contact bodies curved in a mountain shape and having conductivity in parallel to one end of a connecting portion formed by bending a conductive plate body. Connector terminal characterized by. 2. An elastic body curved in a mountain shape is coupled to one end of a connecting portion formed by bending a conductive plate body, and a plurality of conductors are attached in parallel on the outer surface of the elastic body to form a plurality of conductors. A terminal for a connector, which is formed by forming an electric contact portion of.