Electric connector

Abstract

The utility model provides an electric connector, which comprises an insulating base, a moving terminal and a static terminal, the moving terminal and the static terminal are fixedly held on the insulating base, the moving terminal is provided with a first fixedly holding part fixedly held on the insulating base and an elastic contact arm formed by extending from one end of the first fixedly holding part; the elastic contact arm comprises a connecting part, an abutting part formed by extending from the connecting part and a contact part which extends from the abutting part and abuts against the static terminal, the insulating base is provided with a bottom surface which is spaced from the abutting part in the vertical direction so that the abutting part can abut against the bottom surface when the abutting part deforms downwards, and the insulating base further comprises a boss which is formed by protruding upwards corresponding to the connecting part; and the boss is provided with a supporting surface for supporting the connecting part and an arc surface transited from the supporting surface to the bottom surface. The boss of the electric connector enables stress not to be excessively concentrated when the elastic contact arm is pressed downwards, so that the service life of the movable terminal is prolonged, and the contact force of the movable terminal and the static terminal in a normal state is improved.

Description

[Technical field]

[0001] The utility model relates to an electric connector, in particular to an electric connector capable of enhancing terminal contact force and prolonging service life. [Background technology]

[0002] Chinese invention number CN105490112B discloses an electrical connector, comprising an insulating body, a movable terminal and a static terminal fixed on the insulating body, the movable terminal having a holding portion fixed on the insulating body and an elastic contact arm extending forward from one end of the holding portion. When the electrical connector is docked with a docking connector, the insulating body raises the holding portion by providing a stepped boss, and suddenly transitions in the height direction to an inclined surface receiving the elastic contact arm, resulting in stress concentration at the connection between the elastic contact arm and the holding portion, a short service life, weak contact force between the movable terminal and the static terminal, and easy disconnection and brittle failure due to external vibration.

[0003] Therefore, it is necessary to provide a new electrical connector to overcome the above-mentioned defects. [Contents of the utility model]

[0004] The utility model aims to provide an electrical connector which can enhance the contact force of terminals and prolong the service life.

[0005] The purpose of the utility model is achieved through the following technical solutions: an electrical connector, comprising an insulating base, a movable terminal fixed on the insulating base, a static terminal normally in contact with the movable terminal, a hollow insulating cylinder with an insertion cavity assembled on the insulating base from top to bottom, and a metal shell fixed outside the insulating base and the insulating cylinder, the movable terminal comprising a first retaining portion fixed on the insulating base, an elastic contact arm extending from one end of the first retaining portion, and a first pin portion extending from the other end of the first retaining portion, the elastic contact arm comprising a connecting portion extending from the first retaining portion and an abutting portion extending from the connecting portion, the insulating base comprising a bottom surface spaced from the abutting portion in the up-down direction so as to be abutted against by the abutting portion when the abutting portion is deformed downward, the insulating base further comprising a boss formed by protruding upward corresponding to the connecting portion, the boss comprising a supporting surface supporting the connecting portion and an arc surface transitioning from the supporting surface to the bottom surface.

[0006] Furthermore, the bottom surface is an inclined surface that smoothly transitions from the arc surface.

[0007] Furthermore, the connecting portion and the insulating tube portion are spaced apart in the up-down direction.

[0008] Furthermore, when the movable terminal contacts the static terminal, the free end of the elastic contact arm abuts against the lower surface of the static terminal.

[0009] Furthermore, the first retaining portion includes a flat plate portion retained on the insulating base and protrusions formed from both lateral sides of the flat plate portion along a longitudinal direction perpendicular to the lateral direction and deviating from the flat plate portion, and the size of the end of the protrusion is larger than the size of the connection between it and the flat plate portion.

[0010] Furthermore, the movable terminal further includes a pair of support arms extending from two lateral sides of the abutting portion, respectively, and the support arms abut against two lateral sides of the insulating base.

[0011] Furthermore, the abutting portion and the supporting arm are arranged in the same plane, and the insulating base also includes a pair of side portions respectively abutting against the lower surfaces of a pair of supporting arms, and the pair of side portions and the bottom surface form a receiving space for elastic deformation of the movable terminal.

[0012] Furthermore, the connection portion has protrusions extending along both sides in a lateral direction corresponding to the position of the boss, and the lateral dimension of the connection portion gradually decreases from the protrusion toward the abutment portion.

[0013] Furthermore, the first retaining portion is entirely buried in the insulating base, and the upper end of the first retaining portion extends out of the insulating base and is bent and extended along the longitudinal direction to form the elastic contact arm.

[0014] Furthermore, the elastic contact arm also includes a contact portion further extending from the abutting portion and abutting against the static terminal, the contact portion includes two contact pieces arranged at intervals in the transverse direction, and each of the contact pieces is provided with a convex shaped butting contact point.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the movable terminal in the utility model has a first retaining portion retained on an insulating base and an elastic contact arm formed by bending and extending forward from the first retaining portion, the elastic contact arm also includes a connecting portion connected to the first retaining portion, the insulating base protrudes upward to form a boss supporting the connecting portion and a bottom surface receiving the elastic contact arm, the boss smoothly transitions to the bottom surface via an arc surface, the stress will not be too concentrated when the elastic contact arm is pressed downward, thereby increasing the service life of the movable terminal.

[0016] In addition, the arc surface of the boss extends the supporting distance between the connecting portion and the insulating base in the longitudinal direction, so that the supporting point of the boss for the elastic contact arm is closer to the static terminal, thereby improving the contact force between the dynamic terminal and the static terminal.

Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional diagram of the electric connector of the utility model.

[0018] Figure 2 yes Figure 1 A stereogram viewed from another direction.

[0019] Figure 3 It is a three-dimensional exploded view of the electric connector of the utility model.

[0020] Figure 4 yes Figure 3 Exploded perspective view from another direction.

[0021] Figure 5 It is a three-dimensional diagram of the movable terminal and the static terminal of the utility model being fixed on an insulating base.

[0022] Figure 6 It is a three-dimensional exploded view of the movable terminal and the static terminal of the utility model.

[0023] Figure 7 It is a side view of the movable terminal and the static terminal of the utility model after being exploded.

[0024] Figure 8 yes Figure 1 Section view along line AA.

[0025] Fig. 9 It is a cross-sectional schematic diagram after the movable terminal and the docking terminal of the utility model are docked.

[0026] Fig.10 yes Figure 1 Section view along line BB.

[0027] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. [Specific implementation method]

[0028] The following will be combined Figures 1 to 10 The electrical connector 100 of the present invention is described.

[0029] Please refer to Figures 1 to 5 As shown, the electrical connector 100 includes an insulating base 1, an insulating barrel 2 assembled on the insulating base 1 from top to bottom, a movable terminal 3 and a static terminal 4 fixed on the insulating base 1, and a metal shell 5 sleeved on the insulating base 1 and the insulating barrel 2.

[0030] Please refer to Figure 3 and Figure 4As shown, the insulating barrel 2 is covered on the top of the insulating base 1, and the insulating barrel 2 includes a barrel 21 and a support block 22 formed by protruding from the bottom periphery of the barrel 21. The barrel 21 has a hollow insertion cavity 23 for the butt terminal to penetrate deeply, and the insulating barrel 2 is mounted on the top of the insulating base 1 through the support block 22. The metal shell 5 includes a fitting portion 51 nested outside the barrel 21 and a joint portion 52 formed by bending downward and extending from the lateral ends of the fitting portion 51 to abut against the lower surface of the insulating base 1. The metal shell 5 covers the insulating base 1 and the insulating barrel 2 so that the two are fixed and matched.

[0031] The movable terminal 3 comprises a first retaining portion 31 retained on the insulating base 1, an elastic contact arm 32 extending from the upper end of the first retaining portion 31 out of the insulating base 1 and bent and extended along a longitudinal direction perpendicular to the transverse direction, and a first pin portion 33 extending from the lower end of the first retaining portion 31. The static terminal 4 comprises a second retaining portion 41 retained on the insulating base 1, a contact plate 42 extending from the upper end of the second retaining portion 41 out of the insulating base 1, and a second pin portion 43 extending from the lower end of the second retaining portion 41. Under normal conditions, the free end of the elastic contact arm 32 of the movable terminal 3 abuts against the lower surface of the contact plate 42 of the static terminal 4.

[0032] Figure 5 It shows the state in which the movable terminal 3 and the static terminal 4 are installed on the insulating base 1 in this embodiment. The elastic contact arm 32 includes a connecting portion 321 directly extending from the upper end of the first retaining portion 31 out of the insulating base 1 and extending in the direction of the static terminal 4, a contact portion 322 further extending from the connecting portion 321 and located below the insertion cavity 23, and a contact portion 323 extending from the contact portion 322 and used to abut against the lower surface of the contact plate 42 of the static terminal 4.

[0033] Please refer to Figure 6 and Figure 7As shown, the movable terminal 3 is formed by integrally stamping and bending a metal plate. The first retaining portion 31 is integrally buried in the insulating base 1, and has a flat plate portion 311 in the form of a flat plate and a pair of protrusions 312 formed by bending and extending from the lateral ends of the flat plate portion 311 toward the static terminal 4. The flat plate portion 311 is vertically arranged in the up-down direction, and its front and rear surfaces in the longitudinal direction are clamped by the insulating base 1. The protrusion 312 deviates from the flat plate portion 311 in the longitudinal direction from the lateral ends of the flat plate portion 311. The size of the protrusion 312 in the up-down direction gradually increases from the connection with the flat plate portion 311 to the free end, so as to ensure that the movable terminal 3 can be stably retained on the insulating base 1 in all directions. The contact portion 323 at the free end of the elastic contact arm 32 has a pair of contact pieces 324 arranged side by side in the lateral direction, and the end of each contact piece 324 is stamped to form a convex convex contact point 325 protruding upward. The butting contact point 325 abuts against the lower surface of the contact plate 42. The elastic contact arm 32 further includes a pair of support arms 326 extending from both lateral sides of the abutting portion 322 and supported on the insulating base 1. The longitudinal dimension of the support arm 326 decreases from the end toward the abutting portion 322, and the lateral dimension of the contact piece 324 decreases from the end toward the abutting portion 322, so as to respectively guide the stress release of the movable terminal 3 when deformed.

[0034] Please refer to Figure 3 , Figure 5 , Figure 8 and Fig. 9 As shown, the insulating base 1 has a boss 11 protruding upwards at a position corresponding to the connecting portion 321. The insulating base 1 also includes a bottom surface 12 directly connected to the boss 11 for the abutting portion 322 to abut downwards. Figure 8 As shown, in a normal state, the contact piece 324 abuts against the contact plate 42, and the abutting portion 322 is spaced apart from the bottom surface 12 in the vertical direction. The connecting portion 321 abuts against the supporting surface 111 of the boss 11, and the boss 11 also includes an arc surface 112 that smoothly transitions from the supporting surface 111 to the bottom surface 12. Fig. 9As shown, the bottom surface 12 is set as an inclined surface. When the docking terminal enters the insertion cavity 23 and presses the abutting portion 322 downward, the bottom surface 12 as a whole supports the abutting portion 322, and the connecting portion 321 is partially supported on the arc surface 112. The arc surface 112 will guide the stress of the connecting portion 321 to move toward the abutting portion 322, effectively alleviating the stress concentration of the connecting portion 321 caused by the drop between the supporting surface 111 and the bottom surface 12 in the vertical direction. The connecting portion 321 also has a protrusion 3211 formed by protruding from both ends in the lateral direction. The size of the connecting portion 321 in the lateral direction gradually decreases from the protrusion 3211 to the abutting portion 322, guiding the stress to move toward the abutting portion 322. The insulating cylinder 2 is covered on the top of the insulating base 1, and the connecting portion 321 is spaced apart from the lower surface of the insulating cylinder 2.

[0035] Please refer to Figure 7 and Fig.10 The insulating base 1 has a pair of side portions 13 respectively abutting against the ends of the pair of support arms 326. The abutting portion 322 and the support arm 326 are arranged in the same plane, and the abutting portion 322 is spaced apart from the bottom surface 12 in the up-down direction, and the support arm 326 is mounted on the side portion 13. A receiving space 14 is formed between the pair of side portions 13 and the bottom surface 12 for the abutting portion 322 to elastically deform downward.

[0036] The above description is only part of the implementation methods of the utility model, not all of the implementation methods. Any equivalent changes made to the technical solution of the utility model by ordinary technicians in this field after reading the specification of the utility model are covered by the claims of the utility model.

Claims

1. An electrical connector, comprising an insulating base, a movable terminal fixed on the insulating base, a static terminal normally in contact with the movable terminal, an insulating barrel with a hollow arrangement having an insertion cavity assembled on the insulating base from top to bottom, and a metal shell fixed outside the insulating base and the insulating barrel, wherein the movable terminal comprises a first retaining portion fixed to the insulating base, an elastic contact arm extending from one end of the first retaining portion, and a first pin portion extending from the other end of the first retaining portion, the elastic contact arm comprises a connecting portion extending from the first retaining portion and an abutting portion extending from the connecting portion, the insulating base has a bottom surface spaced from the abutting portion in the up-down direction so as to be abutted against by the abutting portion when the abutting portion is deformed downward, characterized in that: The insulating base further includes a boss formed by protruding upward corresponding to the connecting portion, wherein the boss has a supporting surface for supporting the connecting portion and an arc surface transitioning from the supporting surface to the bottom surface.

2. The electrical connector according to claim 1, wherein: The bottom surface is an inclined surface that smoothly transitions from the arc surface.

3. The electrical connector according to claim 1, wherein: The connecting portion and the insulating tube portion are spaced apart in the up-down direction.

4. The electrical connector according to claim 1, wherein: When the movable terminal contacts the static terminal, the free end of the elastic contact arm abuts against the lower surface of the static terminal.

5. The electrical connector according to claim 1, wherein: The first retaining portion includes a flat plate portion retained on the insulating base and protrusions formed from both lateral sides of the flat plate portion along a longitudinal direction perpendicular to the lateral direction and deviating from the flat plate portion, and the size of the end of the protrusion is larger than the size of the connection between it and the flat plate portion.

6. The electrical connector according to claim 1, wherein: The movable terminal further includes a pair of support arms extending from two lateral sides of the abutting portion, respectively, and the support arms abut against two lateral sides of the insulating base.

7. The electrical connector according to claim 6, wherein: The abutting portion and the supporting arm are arranged in the same plane, and the insulating base further comprises a pair of side portions respectively abutting against the lower surfaces of a pair of supporting arms, and the pair of side portions and the bottom surface form a receiving space for elastic deformation of the movable terminal.

8. The electrical connector according to claim 1, wherein: The connection portion is provided with protrusions extending along both sides in a lateral direction corresponding to the boss, and the lateral dimension of the connection portion gradually decreases from the protrusions toward the abutment portion.

9. The electrical connector according to claim 1, wherein: The first retaining portion is entirely buried in the insulating base, and the upper end of the first retaining portion extends out of the insulating base and is bent and extended along the longitudinal direction to form the elastic contact arm.

10. The electrical connector according to claim 1, wherein: The elastic contact arm also includes a contact portion further extending from the abutting portion and abutting against the static terminal. The contact portion includes two contact pieces arranged at intervals in the transverse direction, and each of the contact pieces is provided with a convex shaped butting contact point.

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