CN216145786U

CN216145786U - Terminal fisheye structure and welding-free terminal, connector and connector assembly

Info

Publication number: CN216145786U
Application number: CN202121438640.2U
Authority: CN
Inventors: 梁佩琼; 胡云启; 孟浩; 贾修建; 郭辉
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-03-29
Anticipated expiration: 2031-06-25

Abstract

The utility model belongs to the technical field of connectors, and particularly relates to a terminal fisheye structure, a welding-free terminal, a connector and a connector assembly. Terminal flake structure, including flake main part, flake top, flake root, flake main part includes two curved elastic arm, and two elastic arm enclose into the flake hole, and two elastic arm one end are connected with the flake top, and the other end is connected with the flake root, every the self width of elastic arm reduces from flake top to flake root gradually, and flake root, flake main part, flake top are according to cartridge order along longitudinal arrangement. When the terminal fisheye structure is inserted into a PCB board, the insertion force can be reduced while the holding force is increased.

Description

Terminal fisheye structure and welding-free terminal, connector and connector assembly

Technical Field

The utility model belongs to the technical field of connectors, and particularly relates to a terminal fisheye structure, a welding-free terminal, a connector and a connector assembly.

Background

The connector is an important component for connecting various electrical components in a vehicle, and the contact serves as a core part of the connector to realize the connection function between two electronic devices, so that the reliability of the connection determines the reliability of the electrical components of the vehicle.

When a general contact is connected with a PCB, there are two connection methods, i.e. a solderless connection and a soldering connection. Wherein the welded connection requires additional welding processes, increasing product cost. The solderless connection does not need welding, the conductivity is ensured by interference between the terminal and the copper foil of the PCB, and the influence on other components in the assembling process is avoided, so that the solderless connection is widely applied to the communication field such as high-speed communication. In the vehicle-mounted product, there are vibration and high and low temperature environments, and the reliability of connection of the terminal under the environments is required to be maintained.

When the holding force of the contact area of the solderless terminal and the PCB is insufficient, the solderless terminal is easy to fall off or have poor contact in the vibration process; after long-term high-temperature and low-temperature environments, stress relaxation occurs in the contact area between the terminal and the PCB, so that insufficient holding force and poor contact are caused; the residual stress after the terminal is electroplated and the inherent characteristics of tinning easily generate tin whiskers on the surface of the terminal, thereby causing the internal short circuit of the circuit board.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problem of insecure connection of the terminal, the utility model aims to provide a fisheye structure of the terminal to solve the problem that the fisheye structure is easy to be separated from a PCB (printed circuit board) due to small holding force in the prior fisheye structure; in addition, the utility model also aims to provide a solderless terminal, a connector and a connector assembly which use the fisheye structure.

The purpose of the utility model is realized by adopting the following technical scheme. The terminal fisheye structure comprises a fisheye main body, a fisheye top and a fisheye root, wherein the fisheye main body comprises two arc-shaped elastic arms, the two elastic arms surround a fisheye hole, one ends of the two elastic arms are connected with the fisheye top, the other ends of the two elastic arms are connected with the fisheye root, the width of each elastic arm is gradually reduced from the fisheye top to the fisheye root, and the fisheye root, the fisheye main body and the fisheye top are longitudinally arranged according to an inserting sequence.

Furthermore, the outline of the outermost side of the fisheye hole is a fisheye hole arc, the outline of the outermost side of the elastic arm is an elastic arm arc, and the circle center of the fisheye hole arc is closer to the root of the fisheye than the circle center of the elastic arm arc.

Further, the outer width of the two elastic arms is widened from the top of the fisheye to the root of the fisheye and then narrowed.

Furthermore, the fisheye hole is symmetrical about the longitudinal center line of the terminal fisheye structure, and the two sections of elastic arms are symmetrical relative to the longitudinal center line of the fisheye hole.

Furthermore, the diameters of the circles where the circular arcs of the fisheye holes and the circular arcs of the elastic arms are located are equal.

The welding-free terminal comprises a plug end and a contact end, wherein a compression joint shoulder is arranged between the plug end and the contact end, and the contact end is of the terminal fisheye structure.

Furthermore, the welding-free terminal material is a copper alloy material with the yield strength larger than 520Mpa, the thickness is 0.64mm, the maximum width of the contact end is 1.18mm-1.22mm, the bottom of a plating layer on the terminal is nickel, and the surface of the plating layer is indium.

The connector comprises a shell and a terminal, wherein the terminal comprises a plug end and a contact end, a crimping shoulder is arranged between the plug end and the contact end, and the contact end is of the terminal fisheye structure.

The connector assembly comprises a PCB and a connector, wherein the connector comprises a shell and a terminal, the terminal comprises a plug end and a contact end, a crimping shoulder is arranged between the plug end and the contact end, and the contact end is of the terminal fisheye structure.

Further, the aperture of the PCB in the connector assembly, which is matched with the fisheye structure of the terminal of the connector, is 0.994mm-1.096 mm.

Compared with the prior art, the utility model discloses an useful part lies in:

1. the elastic arm transverse width that the fisheye main part is close to the fisheye root is less, when receiving less thrust, can take place deformation, pushes whole fisheye main part relatively easily, treats that the whole hole that passes the PCB board of fisheye main part, and the elastic arm that the fisheye main part is close to the fisheye top is horizontal great, when pulling back this fisheye structure, need use great power, is convenient for with fisheye structure card in the PCB diaphragm orifice.

2. The terminal material is made of copper alloy material with yield strength larger than 520Mpa, the thickness of the terminal material is 0.64mm, the maximum width of the elastic arm area of the terminal is adjusted to be 1.18-1.22mm, the adaptive PCB aperture is 0.994mm-1.096mm, and the retention force of the terminal after vibration, high-low temperature aging and other tests can be larger than 20N.

3. The plating layer on the terminal adopts nickel to prime the surface and plate indium, and the backflow (reflex) processing is carried out after electroplating, so that the internal stress caused by electroplating can be effectively reduced, and the growth of whiskers is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of an embodiment of a terminal fish-eye structure of the present invention;

fig. 2 is a front view of an embodiment of a solderless terminal of the present invention.

[ reference numerals ]

1-contact end, 11-elastic arm, 111-elastic arm circular arc, 112-elastic arm center, 12-fisheye hole, 121-fisheye hole circular arc, 122-fisheye hole center, 13-fisheye root, 14-fisheye top, 2-pair of insertion ends, and 3-crimping shoulder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, there is an embodiment 1 of a fisheye structure of a terminal of the present invention. The terminal fisheye structure comprises a fisheye main body, a fisheye top 14 and a fisheye root 13, wherein the fisheye main body comprises two arc-shaped elastic arms 11, and the two elastic arms 11 enclose a fisheye hole 12. Two elastic arms 11 are transversely arranged, the fisheye root 13, the fisheye main body and the fisheye top 14 are longitudinally arranged according to the insertion sequence, the longitudinal direction is the insertion and extraction direction of the fisheye structure of the terminal, and the fisheye holes 12 are symmetrical about the longitudinal central line of the fisheye structure. One end of each of the two elastic arms 11 meets the top 14 of the fisheye, and the other end meets the root 13 of the fisheye.

In order to increase the holding force between the fish-eye structure and the PCB board and not increase the insertion force when the fish-eye structure is inserted, in this embodiment, both lateral sides of each elastic arm 11 are arc-shaped, and the two elastic arms 11 are symmetrical with respect to the longitudinal center line of the fish-eye hole 12. The outermost contour of the fisheye 12 is a fisheye arc 121, and the outermost contour of the elastic arm 11 is an elastic arm arc 111.

The centers of the fisheye hole arc 112 and the elastic arm outer side arc 111, namely the fisheye hole center 122 and the elastic arm center 112 in fig. 1, are adjusted, so that the center of the circle where the fisheye hole arc 11 is located is closer to the fisheye root 13 than the center of the circle where the elastic arm arc 111 is located, the transverse width of one end, close to the fisheye root 13, of each of the two elastic arms 11 is narrower than one end, close to the fisheye top 14, of one end of the other end, close to the fisheye root 13, at the moment, the transverse width of each of the two elastic arms 11 is gradually reduced from the fisheye top 14 to the fisheye root 13, the outer side widths of the two elastic arms 11 are firstly widened and then narrowed from the fisheye top 14 to the fisheye root 13, and when the terminal fisheye structure is inserted into a PCB, the insertion force can be reduced and the holding force can be increased.

This downthehole process of fisheye structure insertion PCB board does, at first fisheye root 13 gets into in the PCB board hole, then under thrust extrusion, in the fisheye main part manhole, simultaneously because the centre of a circle of fisheye hole circular arc 121 place circle is closer to fisheye root 13 than the centre of a circle of elastic arm circular arc 111 place circle, so the 11 transverse width of elastic arm that the fisheye main part is close to fisheye root 13 is less, when receiving less thrust, can take place deformation, push whole fisheye main part relatively easily, treat the whole hole that passes the PCB board of fisheye main part, the fisheye main part is close to the 1 transverse width of elastic arm at fisheye top 14 great, when pulling back this fisheye structure, need use great power, be convenient for with fisheye structure card in the PCB board hole.

In embodiment 2 of the terminal fish-eye structure of the present invention, in addition to embodiment 1, the diameters of the circles in which the fish-eye hole arc 112 and the elastic arm arc 111 are located are made equal, and the resistance at the time of insertion is further reduced, and the resistance at the time of pull-back is increased.

The embodiment of the welding-free terminal comprises two parts, wherein one part is a plug end 2 used for connecting a wire harness end of a connector; and a part of the contact end 1 is matched with the PCB, and the structure of the contact end 1 is the same as that of the terminal fisheye structure in the

embodiment

1 or 2, and is not described again. A compression shoulder part 3 is arranged between the contact end 1 and the opposite insertion end 2, and the contact end 1 is used for limiting after being inserted into a hole of the PCB to prevent over-insertion.

The material of the welding-free terminal is copper alloy material with yield strength larger than 520Mpa, and the thickness of the terminal material is 0.64 mm. The maximum width of the elastic arm area of the adjusting terminal is 1.18mm-1.22 mm. The plating layer on the terminal is processed by adopting a mode of nickel priming and indium plating on the surface. And the Reflow (reflex) treatment is carried out after the electroplating, so that the internal stress caused by the electroplating can be effectively reduced, and the growth of whiskers is reduced.

The embodiment of the connector comprises a shell and a terminal arranged in the shell, wherein the terminal comprises two parts, one part is a plug-in end 2 and is used for connecting a wire harness end of the connector; and a part of the contact end 1 is matched with the PCB, and the structure of the contact end 1 is the same as that of the terminal fisheye structure in the

embodiment

1 or 2, and is not described again. The terminal has the same structure as the soldering-free terminal, and is not described in detail.

The embodiment of the utility model relates to a connector assembly, which comprises a PCB (printed circuit board) and a connector inserted on the PCB, wherein the connector comprises a shell and a terminal arranged in the shell, the terminal comprises two parts, one part is an opposite insertion end 2 and is used for connecting a wire harness end of the connector; and a part of the contact end 1 is matched with the PCB, and the structure of the contact end 1 is the same as that of the terminal fisheye structure in the

embodiment

The aperture of a PCB (printed circuit board) matched with the connector in the connector assembly is 0.994-1.096 mm, a welding-free terminal on the connector is inserted into a PCB hole, and particularly, after a fisheye structure on the welding-free terminal is inserted into the PCB, the holding force of the terminal after tests such as vibration, high-temperature and low-temperature aging and the like can be larger than 20N.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Terminal flake structure, including flake main part, flake top (14), flake root (13), the flake main part includes two curved elastic arm (11), and two elastic arm (11) enclose into flake hole (12), and two elastic arm (11) one end are connected with flake top (14), and the other end is connected its characterized in that with flake root (13): the width of each elastic arm (11) is gradually reduced from the top of the fisheye (14) to the root of the fisheye (13), and the root of the fisheye (13), the fisheye body and the top of the fisheye (14) are arranged longitudinally according to the insertion sequence.

2. The terminal fisheye structure of claim 1, wherein: the outline of the outermost side of the fisheye hole (12) is a fisheye hole arc (121), the outline of the outermost side of the elastic arm (11) is an elastic arm arc (111), and the circle center of the circle where the fisheye hole arc (121) is located is closer to the fisheye root (13) than the circle center of the circle where the elastic arm arc (111) is located.

3. The terminal fisheye structure of claim 2, wherein: the outer width of the two elastic arms (11) is widened from the top of the fisheye (14) to the root of the fisheye (13) and then narrowed.

4. The terminal fisheye structure of claim 2, wherein: the fisheye hole (12) is symmetrical about the longitudinal center line of the terminal fisheye structure, and the two sections of the elastic arms (11) are symmetrical relative to the longitudinal center line of the fisheye hole (12).

5. A terminal fisheye structure according to any of claims 2-4 characterised in that: the diameters of the circles where the fisheye hole arc (121) and the elastic arm arc (111) are located are equal.

6. Exempt from to weld formula terminal is provided with crimping shoulder (3), its characterized in that to spigot end (2), contact jaw (1) between spigot end (2) and contact jaw (1): the structure of the contact end (1) is the terminal fish eye structure of any one of the preceding claims 1-5.

7. The solderless terminal of claim 6, wherein: the welding-free terminal is made of copper alloy material with yield strength larger than 520Mpa, the thickness is 0.64mm, the maximum width of the contact end (1) is 1.18mm-1.22mm, the bottom of a plating layer on the terminal is nickel, and the surface of the plating layer is indium.

8. Connector, including casing, terminal, the terminal is including to spigot end (2), contact jaw (1), is provided with crimping shoulder (3), its characterized in that between spigot end (2) and contact jaw (1): the structure of the contact end (1) is the terminal fish eye structure of any one of the preceding claims 1-5.

9. Connector assembly, including PCB board, connector, the connector includes casing, terminal, and the terminal is including to inserting end (2), contact jaw (1), is provided with crimping shoulder (3), its characterized in that between inserting end (2) and contact jaw (1): the structure of the contact end (1) is the terminal fish eye structure of any one of the preceding claims 1-5.

10. The connector assembly of claim 9, wherein: the aperture of the PCB in the connector assembly matched with the fisheye structure of the terminal of the connector is 0.994mm-1.096 mm.