KR102067359B1 - Terminal for electric connector - Google Patents

Terminal for electric connector Download PDF

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Publication number
KR102067359B1
KR102067359B1 KR1020190077506A KR20190077506A KR102067359B1 KR 102067359 B1 KR102067359 B1 KR 102067359B1 KR 1020190077506 A KR1020190077506 A KR 1020190077506A KR 20190077506 A KR20190077506 A KR 20190077506A KR 102067359 B1 KR102067359 B1 KR 102067359B1
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KR
South Korea
Prior art keywords
terminal
groove
female terminal
elastic
female
Prior art date
Application number
KR1020190077506A
Other languages
Korean (ko)
Inventor
한경일
Original Assignee
지에스엠메탈(주)
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Publication date
Application filed by 지에스엠메탈(주) filed Critical 지에스엠메탈(주)
Priority to KR1020190077506A priority Critical patent/KR102067359B1/en
Application granted granted Critical
Publication of KR102067359B1 publication Critical patent/KR102067359B1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/04Pins or blades for co-operation with sockets
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable

Abstract

The present invention relates to a terminal for an electric connector, which comprises: a female terminal (10) including a fixating unit (20) of a short pipe shape, which is inserted into a coupling groove (5a) of a female connector (5) having the coupling groove (5a) on a front surface, and an elastic coupling unit (30) which monolithically protrudes from one end of the fixating unit (20) to the front, and protrudes in a pipe shape having an insertion groove (21) therein; and a male terminal (50) mounted on a male connector (6), and inserted into the insertion groove (21) of the elastic coupling unit (30) of the female terminal (10) in order to send an electric current to the female terminal (10). Here, the elastic coupling unit (30) of the female terminal (10) is divided into a plurality of elastic grip pieces (31) by a plurality of slits (32), which are cut open from a front end to a base end unit and are spaced in a circumferential direction, before being contracted or widened to the inside and outside of the insertion groove (21) of the female terminal (10). In addition, the present invention further comprises a contact unit (40) which is provided at a central portion in a longitudinal direction of each elastic grip piece (31) of the elastic coupling unit (30), while being curved or bent so as to protrude to the inside of the insertion groove (21) of the female terminal (10), in order to come in contact with the male terminal (50) inserted into the insertion groove (21).

Description

Terminal for electric connector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal of an electrical connector, and more particularly, to a terminal of various types of electrical connectors such as charging an electric vehicle or connecting a battery.

In general, an electrical connector electrically connects a cable, an electronic component, and the like, and both connectors are provided with a male and female terminal detachably coupled to each other. Figure 1 shows a terminal of a conventional electrical connector, the male terminal (1) is made of a pin shape of a predetermined diameter, the female terminal (2) is made in a tubular shape so that the male terminal (1) is inserted into the circumferential surface The plurality of slits 2a extend from the distal end to the proximal end and become narrower in diameter toward the distal end to elastically press and hold the male terminal 1 inserted therein. At this time, the female terminal 2 is made by cutting the slit (2a) is formed in the tubular body and then bending the tip to reduce the diameter.

By the way, conventional arm terminal (2) is usually made of pure copper excellent in conductivity, the difference in the degree of spring back due to the banding due to the difference in mechanical properties for each lot of copper copper material, so that the inner diameter of the tip of the female terminal (2) There is a problem that the dimensional accuracy is lowered because it is not uniform. Since only the tip of the female terminal 2 is in contact with the male terminal 1, there is a problem that the contact area is relatively narrow so that the resistance is increased and the electrical characteristics are deteriorated. In addition, since the female terminal 2 is a pure copper material, the elastic limit is low, so when the tip is deformed by an external force, the female terminal 2 cannot be restored, resulting in poor contact with the male terminal 1.

To solve this problem, terminals of electrical connectors as in FIGS. 2 and 3 have been proposed. As shown, the female terminal 2 connected to the male terminal 1 is formed with an insertion groove 3 into which the male terminal 1 is inserted, and is pressed against the insertion groove 3 of the female terminal 2. A spring 4 is inserted to elastically press the male terminal 1. At this time, the pressing spring 4 is produced so that a plurality of incision lines are formed side by side in the width direction side by side on the thin metal plate made of beryllium copper or phosphor bronze, rolled in a circular form with a forming machine to give high elasticity through heat treatment. The pressure spring thus produced is rolled in a circular shape as shown in FIG. 2 and inserted into the insertion groove 3 of the female terminal 2.

However, since the female terminal 2 of the conventional electrical connector is indirectly contacted through the pressure spring 3 without directly contacting the male terminal 1, the electrical flow is reduced because the resistance is increased and the electrical characteristics are reduced. This is not smooth and problems such as heat generation occur. Accordingly, when the arm terminal 2 and the pressure spring 4 are used in a charger or the like, there is a problem in that charging efficiency is lowered and charging time is long.

In order for the pressure spring 4 to elastically pressurize the male terminal 1, the pressure spring 4 is rolled to an outer diameter smaller than the inner diameter of the inlet of the insertion groove 3 of the female terminal 2 to the insertion groove 3. Since the assembly is cumbersome and when the diameter of the insertion groove (3) is fine, such as a low-speed charger, there is a problem in that the production cost is increased because the assembly using a separate device.

Korean Utility Model Registration No. 20-0118367

The present invention has been made to solve the above problems, an object of the present invention is to directly contact and increase the contact area while elastically pressing the male terminal without bending the arm terminal to improve the dimensional accuracy and reduce the resistance and heat generation electrical As the characteristics are improved, the electricity supply efficiency is improved, and while achieving this effect, the assembly process of rolling the leaf spring and inserting it into the micro grooves is not required. Therefore, the production is relatively easy and the production cost is reduced. Can be stably supplied and heat generation and resistance are further reduced by increasing contact area to prevent delay of charging time and damage to the system, and also to prevent shape deformation due to collision with external objects. To provide terminals for electrical connectors that are even more efficient. have.

According to a feature of the present invention, a single tube-shaped fixing portion 20 fitted into the coupling groove 5a of the female connector 5 having the coupling groove 5a formed on the front surface, and one end of the fixing portion 20. An arm terminal 10 which protrudes integrally from the front and includes an elastic coupling portion 30 protruding in a tubular shape having an insertion groove 21 therein; And a male terminal 50 mounted to the male connector 6 and inserted into the insertion groove 21 of the elastic coupling portion 30 of the female terminal 10 to be energized with the female terminal 10. The elastic coupling portion 30 of the female terminal 10 is divided into a plurality of elastic grip pieces 31 by a plurality of slits 32 which are cut from the leading end to the proximal end and are spaced along the circumferential direction, and thus the female terminal 20. Of the insertion grooves 21 of the female terminal 10, which are provided in the inner and outer sides of the insertion grooves 21 of the female terminal 10 in the longitudinal middle portion of the elastic grip piece 31 The terminal of the electrical connector is provided, including; a contact portion 40 which is curved or bent to protrude inwardly and contacts the male terminal 50 inserted into the insertion groove 21.

According to another feature of the invention, the outer diameter (L1) of the male terminal 50 is formed smaller than the inner diameter (L2) of the insertion groove 21 of the female terminal 10, the contact portion of the female terminal (10) 40 is provided with a terminal of an electrical connector, characterized in that the elastic grip piece 31 is double-folded into a cross-sectional recessed shape to be in surface contact with the outer circumferential surface of the male terminal 50.

According to another feature of the present invention, the female terminal 10 further includes an outer cylinder 60 through which the fitting hole 61 into which the elastic coupling part 30 is fitted, and the elasticity of the female terminal 10. An end of the elastic grip piece 31 of the engaging portion 30 is provided with a terminal of the electrical connector is provided with an outward support protrusion 33 is projected outward is provided in contact with the inner peripheral surface of the outer cylinder (60).

As described above, according to the present invention, the elastic coupling portion 30 of the female terminal 10 is divided into a plurality of elastic grip pieces 31 and bent or curved inwardly at an intermediate portion of each elastic grip piece 31 to be male. Since the contact portion 40 is provided in contact with the terminal 50, the elastic coupling portion 30 of the female terminal 10 is directly contacted while being elastically pressed against the male terminal 50. Accordingly, in contrast to the conventional bending of the tip of the female terminal to reduce the diameter, the present invention does not reduce the diameter of the front end of the elastic coupling portion 30 of the female terminal 10 is reduced in dimensional accuracy Compared to the indirect contact between the conventional female terminal and the male terminal by the leaf spring, the present invention reduces resistance and heat generation, thereby improving current efficiency and reducing the risk of fire, thereby improving safety, and rolling the leaf spring in a circular shape. Since the assembly process of inserting into the micro groove of the terminal is not required, the manufacturing process is simplified and the productivity is improved, and the device for assembly is not required, thereby reducing the cost. In addition, since the contact portion 40 is formed in the tubular female terminal 10 itself, the thickness of the contact portion 40 is thicker than that of the conventional leaf spring, which is relatively thin, and thus the resistance is further reduced to further increase the above effect. In addition, as the resistance is reduced, the electrical characteristics are improved and the current flows smoothly. In particular, when the fast charging is performed in the charger, the charging current of the high load is stably supplied so that the charging is smooth and the charging time is delayed and the system is damaged. It is prevented and heat problem is solved.

And the outer diameter (L1) of the male terminal 50 is formed smaller than the inner diameter (L2) of the insertion groove 21 of the female terminal 10, the contact portion 40 of the female terminal (10) has a double cross-sectional shape Since it is bent and surface-contacted to the outer circumferential surface of the male terminal 50, the front end of the conventional female terminal is bent to reduce the diameter so that only the tip whose diameter is reduced is contacted with the male terminal. The heat generation is further reduced so that the above effects are further increased.

On the other hand, by having an outer cylinder 60 formed with a fitting hole 61 is fitted into the elastic coupling portion 30 of the female terminal 10, by bending the front end of the conventional female terminal to reduce the diameter to the front end with the outside Compared to the impact lock shape deformation to reduce the elastic force, the present invention is prevented from being damaged or reduced elasticity due to collision with an external object, etc. as the elastic coupling portion 30 is exposed to the outside. In addition, since the outward support protrusion 33 is formed on the tip of the elastic grip piece 31 of the elastic coupling portion 30 of the female terminal 10 in contact with the inner circumferential surface of the outer cylinder 60, the male terminal 50 is formed. As the elastic grip piece 31 opens as the insertion groove 21 of the female terminal 10 opens, the outward support protrusion 33 is in contact with the inner circumferential surface of the outer cylinder 60. Accordingly, even if the male terminal 50 is repeatedly inserted into the insertion groove 21 of the female terminal 10, the elastic grip piece 31 is prevented from opening beyond the elastic limit, thereby preventing the elastic force from falling and always maintaining a constant tension. Since it is maintained, the contact portion 40 elastically pressurizes the male terminal 50 more stably and continuously so that the contact force is not lowered, so that the power supply efficiency is further improved and the above effects are further increased.

1 shows an example of a terminal of a conventional electrical connector
2 shows another example of a terminal of a conventional electrical connector;
3 is a state in which the pressure spring is assembled to the female terminal of the terminal of Figure 2
4 shows one embodiment of a terminal of an electrical connector according to the invention;
5 is a use state diagram of the embodiment
6 is a combined state diagram of the embodiment

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

3 to 6 show terminals of an electrical connector according to an embodiment of the present invention. As shown, the terminal of the electrical connector according to an embodiment of the present invention includes a female terminal 10 and the male terminal 50. Here, the female connector 5 is mounted to the female terminal 10 and the male connector 6 is mounted to the male terminal 50 is illustrated in the electric vehicle 7 and the charging station not shown, respectively, but limited thereto. It can be used for various kinds of connectors such as a connector for connecting an electric vehicle battery and a motor.

The female terminal 10 includes a fixing part 20, an elastic coupling part 30 and a contact part 40. The fixing part 20 is formed in a single tube shape and is fitted or screwed into the wire 8 or the battery of the female connector 5. At this time, as shown in Figure 5, the coupling groove (5a) is formed on the front surface of the female connector 5, the fixing portion 20 of the female terminal 10 is fitted into the coupling groove (5a) of the female connector (5). . The elastic coupling portion 30 is electrically connected to the male terminal 50 and protrudes integrally from one end of the fixing portion 20 to the front and has a tubular shape in which the tip is opened to have the insertion groove 21 therein. Is done. The female terminal 10 is preferably formed of a circular tube of a conductor such as pure copper having excellent electrical characteristics, and thus the insertion groove 21 also has a circular cross section.

And, as shown in Figure 4, the elastic coupling portion 30 is divided into a plurality of elastic grip pieces 31 by a plurality of slits 32 are cut in the proximal end and spaced along the circumferential direction. That is, the plurality of elastic grip pieces 31 are divided into a plurality of sidewalls of the insertion groove 21 of the tubular elastic coupling portion 30. As such, the elastic coupling part 30 is divided into a plurality of elastic grip pieces 31 and is made of pure copper, so that a predetermined elasticity is provided, so that the male terminal 50 is inserted into the insertion groove 21 when the male terminal 50 is inserted into the insertion groove 21. It is configured to be enclosed or opened in and out of (21).

The contact portion 40 is curved or bent to protrude inwardly from the elastic grip piece 31 of the elastic coupling portion 30, and the male terminal 50 inserted into the insertion groove 21 of the female terminal 10. Elastic contact. As shown in FIG. 6, the contact portion 40 is preferably double-bended in a substantially cross-sectional design in the middle of the elastic grip piece 31 such that the contact portion 40 is in surface contact with the male terminal 50, and is in contact with the male terminal 50. It is more preferable that the site | part which becomes a linear form becomes. As such, since the contact portion 40 is in surface contact with the male terminal 50 in a larger area, the contact area is increased as compared with the conventional banding as shown in FIG. 1 and the leaf spring as shown in FIG. .

The male terminal 50 has a tubular shape in which the front end face is opened so that the front end part is inserted into the insertion groove 21 of the female terminal 10. The proximal end of the male terminal 50 is provided with a connection portion 51 which is fitted or screwed to the wire 8 or the battery. The male terminal 50 is preferably made of a conductor such as pure copper excellent in electrical characteristics. As shown in Figure 6, the outer diameter (L1) of the male terminal 50 is formed smaller than the inner diameter (L2) of the insertion groove 21 of the female terminal 10 is configured to make a surface contact of a large area with the contact portion 40 It is preferable to be. When the outer diameter L1 of the male terminal 50 is larger than the inner diameter L2 of the insertion groove 21 of the female terminal 10, the elastic grip piece 31 is opened a lot and the contact portion 40 is the male terminal 50. This is because the area in contact with the outer circumferential surface of the can be reduced.

On the other hand, the open end of the male terminal 50 may be coupled to the insulating cap 70 made of a material having electrical insulation. Accordingly, when the male terminal 50 is inserted into the insertion groove 21 of the female terminal 10, in particular, in the case of the high-speed charger, the front ends of the male terminal 50 and the female terminal 10 through which a high voltage flows are close to each other. As a result, sparks are prevented from occurring, which effectively prevents fire and electric shock.

Terminal of the electrical connector according to an embodiment of the present invention may further include an outer cylinder 60 surrounding the elastic coupling portion 30 of the female terminal (10). The outer cylinder 60 is made of a tubular body of a predetermined length through which the fitting groove 61 into which the elastic coupling portion 30 of the female terminal 10 is fitted.

On the other hand, the front end of each elastic grip piece 31 of the elastic coupling portion 30 is provided with an outward support projection 33 is projected outward and supported on the inner peripheral surface of the outer cylinder (60). Since the outwardly supporting protrusion 33 is in contact with the inner circumferential surface of the outer cylinder 60, the elastic grip piece 31 is inserted into the male terminal when the male terminal 50 is inserted into the insertion groove 21 of the female terminal 10. Since the elastic force applied to the (50) is increased, the contact portion 40 is more firmly in contact with the male terminal 50 to improve the power supply efficiency. In addition, since the elastic grip piece 31 is prevented from spreading beyond the elastic limit, the opened elastic grip piece 31 can be smoothly returned to its original shape so that the male terminal 50 inserts the groove 21 of the female terminal 10. Since the elastic lowering of the elastic grip piece 31 is prevented even if it is repeatedly inserted into and removed from the elastic grip piece, the elastic grip piece 31 can elastically pressurize the male terminal 50 effectively, so that poor current supply is effectively prevented.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

10: female terminal 20: fixed part
21: insertion groove 30: elastic coupling portion
31: elastic grip piece 32: slit
40: contact part 50: male terminal
60: outer cylinder

Claims (3)

  1. A single tube-like fixing portion 20 fitted into the coupling groove 5a of the female connector 5 having the coupling groove 5a formed on the front surface, and protrudes integrally from one end of the fixing portion 20 toward the front. An arm terminal 10 including an elastic coupling portion 30 protruding in a tubular shape having an insertion groove 21 therein; And
    It is mounted to the male connector (6), the male terminal is inserted into the insertion groove 21 of the elastic coupling portion 30 of the female terminal 10 and the female terminal 10 is energized; includes;
    The elastic coupling portion 30 of the female terminal 10 is divided into a plurality of elastic grip pieces 31 by a plurality of slits 32 which are cut from the leading end to the proximal end and are spaced along the circumferential direction, and thus the female terminal 20. To the inside and outside of the insertion groove 21 of the opening or
    Is provided in the longitudinal middle portion of each elastic grip piece 31 of the elastic coupling portion 30 is bent or bent to protrude into the insertion groove 21 of the female terminal 10 to the insertion groove 21 And a contact portion (40) contacting the inserted male terminal (50).
  2. According to claim 1, the outer diameter (L1) of the male terminal 50 is formed smaller than the inner diameter (L2) of the insertion groove 21 of the female terminal 10, the contact portion 40 of the female terminal (10) The terminal of the electrical connector, characterized in that the elastic grip piece (31) is double-folded into a cross-sectional recessed shape in surface contact with the outer peripheral surface of the male terminal (50).
  3. According to claim 1 or 2, further comprising an outer cylinder 60 through which the fitting hole 61 is fitted, the elastic coupling portion 30 of the female terminal 10, the female terminal 10 The terminal of the electrical connector, characterized in that the front end of the elastic grip piece 31 of the elastic coupling portion 30 is provided with an outward support protrusion (33) protruding outward and supported in contact with the inner peripheral surface of the outer cylinder (60).
KR1020190077506A 2019-06-28 2019-06-28 Terminal for electric connector KR102067359B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020190077506A KR102067359B1 (en) 2019-06-28 2019-06-28 Terminal for electric connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020190077506A KR102067359B1 (en) 2019-06-28 2019-06-28 Terminal for electric connector

Publications (1)

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KR102067359B1 true KR102067359B1 (en) 2020-01-15

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KR1020190077506A KR102067359B1 (en) 2019-06-28 2019-06-28 Terminal for electric connector

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06275331A (en) * 1993-03-18 1994-09-30 Sumitomo Wiring Syst Ltd Connector terminal
JPH06325811A (en) * 1993-05-14 1994-11-25 Yazaki Corp Socket type terminal
KR200118367Y1 (en) 1994-07-30 1999-05-15 Korea Bug Co Ltd Electrical connector
JP2013171739A (en) * 2012-02-21 2013-09-02 Mitsumi Electric Co Ltd Female terminal, connector, and connector device
KR20150072025A (en) * 2013-12-19 2015-06-29 주식회사 유라코퍼레이션 Connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06275331A (en) * 1993-03-18 1994-09-30 Sumitomo Wiring Syst Ltd Connector terminal
JPH06325811A (en) * 1993-05-14 1994-11-25 Yazaki Corp Socket type terminal
KR200118367Y1 (en) 1994-07-30 1999-05-15 Korea Bug Co Ltd Electrical connector
JP2013171739A (en) * 2012-02-21 2013-09-02 Mitsumi Electric Co Ltd Female terminal, connector, and connector device
KR20150072025A (en) * 2013-12-19 2015-06-29 주식회사 유라코퍼레이션 Connector

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