Welded spring probe assembly

Abstract

The utility model provides a welding type spring probe assembly, belonging to the spring probe technology field, the welding type spring probe assembly comprises a conductor housing and a contact head assembly, the contact head assembly comprises a connecting rod, a connecting head and a semispherical contact head; the whole contact head assembly is connected with the conductor shell through the elastic element, the contact head assembly can contract relative to the conductor shell, the height space proportion is reduced, the assembling space is effectively saved, the contact head assembly can be suitable for miniaturized equipment, and electric connection in the miniaturized equipment is achieved; the number of contact surfaces of the contact head assembly is reduced from double contact heads to single contact heads, signal transmission paths are reduced, the cost is effectively reduced, and the risk of poor contact is reduced; a hemispherical contact head is arranged in the contact head assembly, so that a printed board bonding pad is prevented from being punctured in a long-term contact process; the problems that an existing spring probe is large in height space proportion, poor in contact and prone to puncturing a bonding pad are solved.

Description

Technical Field

[0001] This utility model belongs to the field of spring probe technology, and in particular relates to a welded spring probe assembly. Background Technology

[0002] Currently, spring probes transmit signals and current through a "contact head-conductor housing and spring-contact head" connection, enabling signal transmission between printed circuit boards. However, as equipment evolves towards miniaturization, lightweight design, and high reliability, the above approach suffers from the following drawbacks:

[0003] 1. For applications with strict space requirements, the height of the contact heads on both sides of the probe accounts for a large proportion of the space.

[0004] 2. Increase the contact surface: the PCB contacts the contact head, the contact head contacts the spring, and the spring contacts the other end of the contact head, thus increasing the signal transmission path.

[0005] 3. The contact head makes direct contact with the pads on the printed circuit board. The pointed and flat contact heads are prone to puncturing the pads during long-term contact, affecting the reliability of the contact. Utility Model Content

[0006] In view of the above-mentioned problems in the prior art, the present invention aims to provide a welded spring probe assembly, which solves the problems of large height space ratio, poor contact and easy puncture of solder pads in existing spring probes.

[0007] To achieve the above-mentioned utility model objectives, the technical solution adopted by this utility model is as follows: A weldable spring probe assembly is provided, which includes a conductor shell and a contact head assembly. The conductor shell is a hollow cylindrical structure with an opening at the top and a closed bottom. A welding station for welding with a printed circuit board is provided at the bottom of the conductor shell, and a through hole communicating with the interior of the conductor shell is provided at the top of the conductor shell. The contact head assembly includes a vertically arranged connecting rod. The bottom part of the connecting rod passes through the through hole and is located inside the conductor shell, and a connector is provided on it. The connector is a cylindrical structure. The outer diameter of the connector is larger than the diameter of the through hole and smaller than the inner diameter of the conductor shell. The connector is slidably connected to the interior of the conductor shell. An elastic element is provided between the connector and the bottom of the conductor shell. A semi-circular contact head is provided at the top of the connecting rod, located outside the conductor shell and in contact with the solder pads of the printed circuit board.

[0008] Furthermore, the welding station includes a first connecting part, a second connecting part, and a third connecting part, all of which are cylindrical and coaxially arranged with the conductor shell. The upper end face of the first connecting part is fixedly connected to the bottom end face of the conductor shell. The outer diameter of the first connecting part is larger than the outer diameter of the conductor shell. The circumferential outer wall of the first connecting part is interference-fitted with the base.

[0009] The upper end surface of the second connecting part is fixedly connected with the lower end surface of the first connecting part, the outer diameter of the second connecting part is larger than that of the first connecting part, and the upper end surface of the second connecting part is in contact with the lower end surface of the base;

[0010] The upper end surface of the third connecting part is fixedly connected with the lower end surface of the second connecting part, the outer diameter of the third connecting part is smaller than that of the conductor shell, and the lower end surface of the third connecting part is in a plane structure and is welded with the printed board.

[0011] Further, the top of the third connecting part is provided with an annular groove.

[0012] Further, the elastic element is a cylindrical spring, and the two ends of the elastic element are in abutting contact with the bottom end surface of the connecting head and the inner bottom end surface of the conductor shell respectively.

[0013] Further, the bottom end surface of the connecting head is an inclined surface.

[0014] The welding type spring probe assembly has the advantages that:

[0015] 1. The welding type spring probe assembly has the advantages that: the contact head assembly is connected with the conductor shell through the elastic element, the contact head assembly can be contracted relative to the conductor shell, the height space ratio is reduced, the assembly space is effectively saved, the welding type spring probe assembly can be applied to small-sized equipment, and electrical connection in the small-sized equipment is realized; the number of contact surfaces of the contact head assembly is reduced from two contact heads to one contact head, the signal transmission path is reduced, the cost is effectively reduced, and the risk of poor contact is reduced; the hemispherical contact head in the contact head assembly is arranged, and the printed board pad is prevented from being pierced in a long-term contact process; and the problems of the existing spring probe, such as large height space ratio, poor contact and easy piercing of the pad, are solved.

[0016] 2. The welding type spring probe assembly has the advantages that: the third connecting part arranged in the welding table is convenient for welding of the whole welding type spring probe assembly and the printed board; the annular groove arranged in the third connecting part prevents virtual welding caused by tin climbing in the welding process; the second connecting part is arranged to facilitate positioning between the whole welding type spring probe assembly and the base; and the circumferential outer wall of the first connecting part is in interference fit with the base, so that the whole welding type spring probe assembly is prevented from falling off from the base.

[0017] 3. The welding type spring probe assembly has the advantages that: the bottom end surface of the connecting head is an inclined surface, so that the connecting head is in close contact with the conductor shell to reduce the probability of instantaneous power failure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a three-dimensional structure schematic view of the welding type spring probe assembly.

[0019] Fig. 2 It is an internal sectional structure schematic view of the welding type spring probe assembly.

[0020] 1, conductor shell; 2, contact head assembly; 21, connecting rod; 22, connecting head; 23, hemispherical contact head; 3, welding platform; 31, first connecting part; 32, second connecting part; 33, third connecting part; 4, via hole; 5, elastic element; 6, annular groove; 7, inclined surface. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, all the invention and creation using the concept of the utility model are within the scope of protection.

[0022] As shown in Figs. 1-2 The utility model provides a kind of welded spring probe assembly, it includes conductor shell 1 and contact head assembly 2, conductor shell 1 is hollow cylindrical structure with opening in top, bottom closed, the bottom of conductor shell 1 is provided with the welding platform 3 welded with printed board, the top of conductor shell 1 is provided with via hole 4 communicated with its inside;Contact head assembly 2 includes vertically arranged connecting rod 21, connecting rod 21 bottom end portion passes through via hole 4 and is located in conductor shell 1 and is provided with connecting head 22 on it, connecting head 22 is cylindrical structure, the outer diameter of connecting head 22 is greater than the diameter of via hole 4, less than the inner diameter of conductor shell 1, connecting head 22 and conductor shell 1 inside sliding connection is established, connecting head 22 and the bottom of conductor shell 1 are provided with elastic element 5, connecting rod 21 top end is provided with semicircular contact head located outside conductor shell 1 and contact with printed board pad.

[0023] In the above technical scheme, contact head assembly 2 is connected with conductor shell 1 by elastic element 5, contact head assembly 2 can be shrunk relative to conductor shell 1, reduce the height space proportion, effectively save assembly space, can be applicable to miniaturization equipment, realize the electrical connection inside miniaturization equipment;The number of contact surface of contact head assembly 2 is reduced from double contact head to single contact head, reduces signal transmission path, effectively reduces cost, reduces the risk of poor contact;The setting of hemispherical contact head 23 in contact head assembly 2 avoids piercing printed board pad in long-term contact process;Solve the problem that the existing spring probe has large height space proportion, poor contact and easy to pierce pad.

[0024] Specifically, the mounting method of the solderable spring probe assembly is to first put the elastic element 5 into the conductor shell 1, then install the connecting head 22, and then use the riveting equipment to rivet the conductor shell 1 and the connecting head 22, and through the mechanical elasticity of the elastic element 5, the connecting head 22 is smoothly compressed and spring up in the conductor shell 1.

[0025] Preferably but not limitedly, the soldering table 3 includes a first connecting part 31, a second connecting part 32 and a third connecting part 33, which are all cylindrical structures and coaxially arranged with the conductor shell 1, the upper end surface of the first connecting part 31 is fixedly connected with the bottom end surface of the conductor shell 1, the outer diameter of the first connecting part 31 is larger than that of the conductor shell 1, and the circumferential outer wall of the first connecting part 31 is in interference fit with the base, preventing the entire solderable spring probe assembly from falling off from the base.

[0026] The upper end surface of the second connecting part 32 is fixedly connected with the lower end surface of the first connecting part 31, the outer diameter of the second connecting part 32 is larger than that of the first connecting part 31, and the upper end surface of the second connecting part 32 is in contact with the lower end surface of the base, facilitating the positioning between the entire solderable spring probe assembly and the base.

[0027] The upper end surface of the third connecting part 33 is fixedly connected with the lower end surface of the second connecting part 32, the outer diameter of the third connecting part 33 is smaller than that of the conductor shell 1, and the lower end surface of the third connecting part 33 is in a plane structure, facilitating the soldering of the entire solderable spring probe assembly on the printed board.

[0028] Preferably but not limitedly, the top of the third connecting part 33 is provided with an annular groove 6, which prevents tin climbing from causing false welding during the process of soldering the entire solderable spring probe assembly on the printed board.

[0029] Specifically, the elastic element 5 is a cylindrical spring, the two ends of the elastic element 5 are in abutting contact with the bottom end surface of the connecting head 22 and the inner bottom end surface of the conductor shell 1 respectively, the bottom end surface of the connecting head 22 is an inclined surface 7, ensuring that the connecting head 22 is in close contact with the conductor shell 1 to reduce the probability of instantaneous power failure.

Claims

1. A soldered spring probe assembly, characterized by, The utility model provides a contact head assembly and conductor shell, the conductor shell is hollow cylinder structure with open top and closed bottom, the bottom of conductor shell is provided with the welding platform which is welded with the printed board, the top of conductor shell is provided with the via hole which is communicated with the inside of conductor shell, the contact head assembly includes the connecting rod which is arranged vertically, the bottom end of connecting rod is located in the conductor shell through the via hole and is provided with the connecting head, the connecting head is cylindrical structure, the outer diameter of connecting head is larger than the diameter of via hole and smaller than the inner diameter of conductor shell, the connecting head is connected with the inside of conductor shell in sliding mode, the elastic element is arranged between the connecting head and the bottom of conductor shell, the top end of connecting rod is provided with the hemisphere contact head which is located outside the conductor shell and contacts with the pad of printed board. The welding platform includes the first connecting part, the second connecting part and the third connecting part which are coaxially arranged with the conductor shell and are cylindrical structure, the upper end surface of first connecting part is fixedly connected with the bottom end surface of conductor shell, the outer diameter of first connecting part is larger than the outer diameter of conductor shell, the outer wall of first connecting part is in interference fit with the base; The upper end surface of second connecting part is fixedly connected with the lower end surface of first connecting part, the outer diameter of second connecting part is larger than the outer diameter of first connecting part, the upper end surface of second connecting part is in contact with the lower end surface of base; The upper end surface of third connecting part is fixedly connected with the lower end surface of second connecting part, the outer diameter of third connecting part is smaller than the outer diameter of conductor shell, the lower end surface of third connecting part is flat structure and is welded with the printed board; The top of third connecting part is provided with annular groove.

2. The welded spring probe assembly of claim 1, wherein, The elastic element is cylindrical spring, the two ends of elastic element are in abutting contact with the bottom end surface of connecting head and the inner bottom end surface of conductor shell respectively.

3. The welded spring probe assembly of claim 2, wherein, The bottom end surface of connecting head is inclined surface.

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