CN111864440A

CN111864440A - Stability-enhanced triangular contact type elastic PIN needle

Info

Publication number: CN111864440A
Application number: CN202010947803.3A
Authority: CN
Inventors: 戴恩立
Original assignee: Shanghai Xiwo Electrical Appliance Co ltd
Current assignee: Shanghai Yanze Intelligent Technology Co.,Ltd.
Priority date: 2020-06-08
Filing date: 2020-09-10
Publication date: 2020-10-30

Abstract

The invention relates to the technical field of connector parts in the electronic industry, in particular to a triangular contact type elastic PIN needle with improved stability, wherein a first edge, a second edge and a third edge are arranged on an elastic PIN needle body, the first edge and the second edge are positioned on one side surface of the elastic PIN needle body, and the third edge is positioned on the other side surface of the elastic PIN needle body and is arranged opposite to the first edge and the second edge; the first ridge, the second ridge and the third ridge are independent on the elastic PIN needle body. The invention has the advantages that: increase contact stability; the torsion and the rotation of the part are prevented, and the contact reliability is improved; the stability of the product during insertion is improved, the position assembly precision of the elastic PIN needle is ensured, the quality requirement after automatic assembly is improved, and the reliability of the product is improved; the elastic modulus is enhanced, and the service life is prolonged; the production efficiency is greatly improved, the management of defective products is also improved, and the quality is greatly improved.

Description

Stability-enhanced triangular contact type elastic PIN needle

Technical Field

The invention relates to the technical field of connector parts in the electronic industry, in particular to a triangular contact type elastic PIN needle with improved stability.

Background

The connector part of the electronic industry is commonly called an elastic PIN needle. The bridge has the function of erecting a bridge connected with a blocked part or isolated and non-connected circuits in the circuit in a solderless grounding mode, so that current flows, and the circuit realizes a preset function.

The form and structure of the connector are various, and various forms of connectors are produced due to differences in the objects, frequencies, powers and application environments of the application, but whatever the connector is, in order to ensure smooth and reliable flow of the current.

The elastic PIN needle is a core part in the electronic industry, is pressed together with a PCB hole in a pressing mode, and completes the connection of an electric function in a solderless mode. Generally, a connector is composed of two contacts, a female contact and a male contact. The resilient PIN is called a male contact (the raw material is typically tin bronze and brass) and the PCB board is called a female contact. When the elastic PIN needle is inserted into the jack of the PCB, the male contact and the female contact occur, and the elastic force is generated by elastic deformation in a pressing mode, so that the male contact and the female contact form tight contact, and the electric function connection is completed.

Currently, the PIN precursor is a connector called a "fish eye" PIN, as shown in fig. 1 (a), while the second PIN is not "fish eye" shaped, which changes the "fish eye" hole into a solid PIN without holes or a resilient PIN with holes, as shown in fig. 1 (b). But they are all in press-fit contact with two edges.

However, the elasticity of the PIN in the prior art cannot be maintained for a long time, and the PIN often rotates and loosens during use, so that the PIN is unstable in contact and the like; meanwhile, the problem that the self-rotation cannot be fundamentally solved, the stability of the contact between the self-rotation and the PCB cannot be guaranteed, the bending deformation of the PIN needle cannot be guaranteed even in the installation precision of the assembly process, and the verticality cannot be guaranteed, so that the contact is unstable.

Therefore, the quality of the production mode cannot ensure zero defects, the working efficiency and the quality requirement of the whole production line are reduced, the production rejection rate is high, and the production cost is high.

Disclosure of Invention

The invention aims to provide a triangular contact type elastic PIN needle with increased stability according to the defects of the prior art, the concave-convex pressing between the triangular contact type elastic PIN needle and a PCB is realized to be supported on three sides through an independent triangular contact type structure design, the connection strength of a ridge is enhanced, the elastic PIN needle is stably inserted into an assembly jack, and the contact stability between the elastic PIN needle and the jack is increased.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a three-edged contact elasticity PIN needle of increase stability, includes elasticity PIN needle body, its characterized in that: the elastic PIN needle body is provided with a first ridge, a second ridge and a third ridge, wherein the first ridge and the second ridge are located on one side surface of the elastic PIN needle body, and the third ridge is located on the other side surface of the elastic PIN needle body and arranged opposite to the first ridge and the second ridge; the first ridge, the second ridge and the third ridge are independent on the elastic PIN needle body.

The lengths of the first edge, the second edge and the third edge are matched with the depth of the hole wall of the jack.

The third rim is disposed at a midpoint between the first rim and the second rim.

The invention has the advantages that: the pulling-out fastness of the elastic PIN needle is improved by adopting a triangular contact type pressing form; the elastic PIN needle is prevented from twisting (twisting left and right) and rotating, so that the elastic PIN needle is more stable and vibration resistant; the contact reliability is improved, the conductivity is increased, and the conductivity is more stable; the device has low input force and high drawing force, realizes the possibility of repeated plugging and unplugging, increases the utilization rate and prolongs the service life; the deformation of the PCB is reduced; the stability of the product during insertion is improved, the position assembly precision of the elastic PIN needle is ensured, the quality requirement after automatic assembly is improved, and the reliability of the product is improved; greatly improves the production efficiency, greatly improves the quality and can ensure zero defect.

Drawings

FIG. 1 is a schematic structural diagram of a PIN in the prior art;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

FIG. 4 is a schematic structural diagram of a three-edged contact type elastic PIN PIN inserted into a PCB in the invention;

FIG. 5 is a state diagram of FIG. 4;

FIG. 6 is a schematic diagram of the structure of the present invention;

FIG. 7 is a graph showing the result of the indentation force test of the 0.63mm elastic PIN of the present invention;

FIG. 8 is a drawing force test result chart of the 0.63mm elastic PIN of the present invention;

FIG. 9 is a graph showing the result of the indentation force test of the 0.8mm elastic PIN of the present invention;

FIG. 10 is a drawing force test result chart of the 0.8mm elastic PIN of the present invention;

FIG. 11 is a schematic diagram of the design and fabrication of the present invention;

FIG. 12 is a schematic diagram of the allowable variation range of the present invention;

FIG. 13 is a table of typical specifications for the present invention during manufacture;

FIG. 14 is a table of typical specifications for the present invention as manufactured.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-14, the labels 1-7 are respectively shown as: elastic PIN needle 1, first arris 2, second arris 3, third arris 4, contact surface 5, PCB board 6, jack 7.

Example (b): as shown in fig. 2, the body of the triangular contact type elastic PIN 1 with increased stability in this embodiment is the elastic PIN 1, and the elastic PIN 1 can be inserted into an adjacent jack on the jack board, so as to complete the installation and fixation between the elastic PIN 1 and the PCB.

As shown in fig. 2 and 3, the upper surface of the elastic PIN 1 is provided with a first rib 2 and a second rib 3 which have the same structure, wherein the first rib 2 and the second rib 3 are both rib-shaped structures protruding from the upper surface of the elastic PIN 1, and the first rib 2 and the second rib 3 are arranged at a certain distance. As shown in fig. 3, a third ridge 4 is provided on the lower surface of the elastic PIN 1, and the third ridge 4 is disposed at a midpoint position of the first ridge 2 and the second ridge 3, that is, the first ridge 2 and the second ridge 3 are symmetrically disposed with the third ridge 4 as a center of symmetry. The third ridge 4 is also in a ridge structure protruding out of the lower surface of the elastic PIN needle 1. When the elastic PIN needle 1 is inserted into the jack on the PCB, the first rib 2 and the second rib 3 respectively form force support in the jack in two directions, and the third rib 4 in the other plane forms force support in the jack in the third direction, so that the elastic PIN needle 1 can simultaneously have fixing force in the three directions to form three-side support of a three-rib contact type, and the elastic PIN needle 1 can be effectively and firmly fixed in the jack and has stability and vibration resistance.

As shown in fig. 2, the first rib 2, the second rib 3, and the third rib 4 have mutually independent cross sections on the elastic PIN 1. Meanwhile, the lengths of the first rib 2, the second rib 3 and the third rib 4 are extended, and the extended lengths are sufficient to enable the ribs to be in complete contact with the hole wall of the jack, that is, the lengths of the first rib 2, the second rib 3 and the third rib 4 are matched with the depth of the hole wall of the jack, and are generally slightly greater than the depth of the hole wall of the jack, so that the ribs and the jack are ensured to be in complete contact.

As shown in fig. 4, when the elastic PIN 1 is inserted into the insertion hole 7 of the PCB 6, the first rib 2, the second rib 3, and the third rib 4 thereof are respectively in contact with the hole wall of the insertion hole 7, thereby forming a triangular contact type male-female press fit.

Thus, as shown in fig. 8 and 9, the elastic PIN in this embodiment is designed by the independent cross-sectional shape on one hand and the ridge length on the other hand, so that the contact area between the elastic PIN 1 and the insertion hole is increased, that is, the three-side support of the three-edge contact type increases the contact friction coefficient, thereby ensuring that the elastic PIN 1 is fixed in position in the insertion hole 7 and preventing unstable contact with the insertion hole due to rotation of the elastic PIN in the using process. Meanwhile, as the contact surface 5 of the elastic PIN needle 1 is enlarged, the assembly center is more stable and the shaking is less in the high-speed assembly process; and the verticality requirement between the elastic PIN needle 1 and the jack 7 is ensured by the principle of determining a plane by three points, the assembly position precision is improved, the elastic PIN needle 1 is ensured not to deform or distort, and 100% quality assurance after batch production is realized.

In the embodiment, in specific implementation: the elastic modulus of the first arris 2, the second arris 3 and the third arris 4 can be increased, the stability of the insertion force and the drawing force of the elastic PIN needle 1 is improved, the fluctuation range is reduced, and the control of the tolerance zone of the elastic force value tends to be stable.

As shown in fig. 7 to 10, it is proved by practical tests that the elastic PIN 1 in the present embodiment has the characteristics of low press-in force and high pull-out force, so that the possibility of multiple times of inserting and pulling out the elastic PIN 1 is realized during use, the utilization rate is increased, and the service life is prolonged.

As shown in fig. 11, the design and manufacture of the elastic PIN 1 can meet various special requirements of customers. In addition to the usual specifications, it can also be custom-made. In general, the thickness A in FIG. 11 can be selected to be 2.8mm, 1.5mm, 0.63mm, 0.5mm, and the length L can be selected according to practical situations, as shown in the table of FIG. 14. As shown in fig. 13, it is a general specification table of the elastic PIN 1 corresponding to the hole diameter of the jack 9 on the PCB 8.

As shown in fig. 12, when the elastic PIN 1 is inserted into the jack 8 of the PCB, the three-edge contact slightly deforms the hole wall of the jack 8, and on the premise that the deformation range meets the requirements of IEC60352-5& multispring specifications, the deformation amount of the PCB is effectively reduced, the product quality is improved, and zero defects can be guaranteed.

The elastic PIN needle 1 in the embodiment can be widely applied to industries such as automobiles, various electrical appliances, aviation, electronics and the like. The method is particularly widely applied to the electronic industry, the original pressing contact technology between the PCB and the PIN needle in the electronic industry is complex in process, and particularly welding is needed. If the soldering is poor, a cold joint may occur, which may lead to poor functions. And elasticity PIN needle 1 in this embodiment need not the welding, has both solved the bad problem of rosin joint and has solved the puzzlement that fisheye PIN needle exists not good state through perfect pressfitting contact technique.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.

Claims

1. The utility model provides a three-edged contact elasticity PIN needle of increase stability, includes elasticity PIN needle body, its characterized in that: the elastic PIN needle body is provided with a first ridge, a second ridge and a third ridge, wherein the first ridge and the second ridge are located on one side surface of the elastic PIN needle body, and the third ridge is located on the other side surface of the elastic PIN needle body and arranged opposite to the first ridge and the second ridge; the first ridge, the second ridge and the third ridge are independent on the elastic PIN needle body.

2. The three-edged contact type elastic PIN needle with increased stability of claim 1, wherein: the lengths of the first edge, the second edge and the third edge are matched with the depth of the hole wall of the jack.

3. The three-edged contact type elastic PIN needle with increased stability of claim 1, wherein: the third rim is disposed at a midpoint between the first rim and the second rim.