pin

Abstract

The utility model discloses a contact pin, include: contact section, welding section and connecting section, the contact section is slender columnar structure, the welding section is flaky structure, the connecting section is connected between the contact section and the welding section, the connecting section is U type shell shape structure, the connecting section is equipped with the locating piece one side close to the contact section, and the locating piece is inclined to set, the contact section the welding section the connecting section with the locating piece integrated stamping forming, the contact section, welding section, connecting section and locating piece are through continuous stamping forming in the utility model, avoid the cumulative error of split assembly, save the secondary processing of split component, eliminate the connecting weak point of split structure, and the anti -fatigue performance is more excellent, and high -speed batch production can be realized simultaneously, and the manufacturing cost of unit product is reduced obviously.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, and in particular to a pin. Background Technology

[0002] Current pin insertion technology is developing towards high density and high reliability, and is widely used in consumer electronics, automotive and industrial control fields, focusing on contact stability and assembly efficiency, but it faces the challenge of miniaturization and performance balance.

[0003] Currently, pin insertion has significant shortcomings in manufacturing cost and production efficiency. This is mainly due to the complex shape of the pin contact section, requiring multiple processing steps, which undoubtedly increases equipment investment and labor costs. On the other hand, the unreasonable structural design of the welding section increases the difficulty of adapting to automated welding, leading to increased manual intervention and consequently low efficiency. Furthermore, current pin insertion often employs split molding and multiple clamping and positioning, which not only increases tooling costs but also reduces production capacity due to cumbersome processes. It is also more prone to increased scrap rates due to accumulated errors, further pushing up overall costs and making it difficult to meet the demands of large-scale production. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a pin that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On the one hand, this utility model provides a pin, including:

[0007] The contact segment has a slender columnar structure;

[0008] Welding segment, said welding segment having a sheet-like structure; and

[0009] A connecting section is provided between the contact section and the welding section; the connecting section has a U-shaped shell structure; a positioning piece is provided on the side of the connecting section near the contact section, and the positioning piece is inclined.

[0010] The contact section, the welding section, the connecting section, and the positioning piece are integrally stamped.

[0011] Preferably, the contact section, the welding section, and the connecting section are integrally stamped from phosphor bronze strip.

[0012] Preferably, the thickness of the phosphor bronze strip is 0.12 mm to 0.18 mm, and the thickness tolerance of the phosphor bronze strip is ±0.005 mm.

[0013] Preferably, the outer diameter of the contact segment is 0.48 mm to 0.72 mm.

[0014] Preferably, the cross-section of the contact segment is at least one of a circle, a rectangle, or a polygon.

[0015] Preferred options also include:

[0016] The reinforcing ribs are respectively disposed on the welding section and the connecting section, and the reinforcing ribs disposed on the welding section and the reinforcing ribs disposed on the connecting section are connected to each other.

[0017] Preferably, the opening of the connecting segment is located at the upper end of the connecting segment; the upper end of the side wall of the connecting segment is folded outward to provide multiple limiting protrusions; the bottom wall of the connecting segment is connected to the welding segment.

[0018] Preferably, one end of the positioning piece is connected to the bottom wall of the connecting section, and the other end of the positioning piece is inclined upward and the positioning piece is higher than the contact section.

[0019] Preferably, the contact segment is partially plated with a gold layer.

[0020] Preferably, the welding section is provided with a matte tin plating layer.

[0021] The beneficial effects of this utility model are as follows:

[0022] In this invention, the contact section, welding section, connecting section, and positioning piece are formed by continuous stamping, which avoids the cumulative error of separate assembly, eliminates the need for secondary processing of separate parts, eliminates the weak connection points of the separate structure, and provides better fatigue resistance while enabling high-speed mass production and significantly reducing the manufacturing cost per unit product.

[0023] In this invention, the contact section is designed as a slender columnar structure, which can better adapt to high-density installation scenarios and better meet the docking needs of consumer electronics or automotive connectors in narrow spaces.

[0024] In this invention, the welding section adopts a sheet-like structure, which can increase the welding area and reduce the risk of incomplete welding.

[0025] In this invention, the connecting section adopts a U-shaped shell structure, which allows for elastic deformation during insertion and installation, and can also absorb the mechanical stress generated during insertion and removal, thus preventing breakage at the connection point between the contact section, welding section and connecting section.

[0026] The high-precision phosphor bronze strip used in this invention has a very small thickness tolerance and excellent flatness, which ensures that the high-precision phosphor bronze strip fits tightly with the stamping die, avoiding over- or under-pressure caused by uneven local thickness, and reducing problems such as cracking, deformation, and burrs.

[0027] The outer diameter of the contact section in this invention can be matched with the inner diameter of the socket to reserve a suitable fitting gap, which can not only ensure smooth insertion and removal, but also ensure a tight fit with the inner wall of the socket through the slight elastic deformation of the pin, resulting in a stable contact area and well meeting the requirements of low contact resistance.

[0028] In this invention, reinforcing ribs are provided on the welding section and the connecting section to enhance the welding strength.

[0029] In this invention, a gold-plated layer is provided in a localized area of ​​the contact section, and a matte tin-plated layer is provided on the welding section, which realizes automated assembly, improves production efficiency and product quality, and reduces production costs. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of the insert provided in an embodiment of the present invention;

[0032] Figure 2 This is a side view of the pin structure provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of the insert provided in an embodiment of the present invention.

[0034] In the picture:

[0035] 100. Contact section;

[0036] 200. Welded section; 210. Reinforcing rib;

[0037] 300. Connecting section; 310. Positioning piece; 320. Limiting boss. Detailed Implementation

[0038] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model are further described in detail below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] Figure 1 This is a schematic diagram of the three-dimensional structure of the insert provided in an embodiment of the present invention; Figure 2 This is a side view of the pin structure provided in an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the pin structure provided in an embodiment of the present invention. Figure 3 In the middle, p represents a cross-section. For example... Figures 1 to 3 As shown, this embodiment provides a pin, including: a contact section 100, a welding section 200, and a connecting section 300; the contact section 100 has an elongated columnar structure; the welding section 200 has a sheet-like structure; the connecting section 300 connects the contact section 100 and the welding section 200; the connecting section 300 has a U-shaped shell structure; a positioning piece 310 is provided on the side of the connecting section 300 near the contact section 100, and the positioning piece 310 is inclined; the contact section 100, the welding section 200, the connecting section 300, and the positioning piece 310 are integrally stamped.

[0042] In this invention, the contact section, welding section, connecting section, and positioning piece are formed by single or continuous stamping, avoiding the cumulative error of separate assembly, eliminating the need for secondary processing of separate parts, eliminating weak points in the connection of the separate structure, and achieving better fatigue resistance while enabling high-speed mass production, significantly reducing the manufacturing cost per unit product.

[0043] The slender columnar structure of the contact segment 100 provided in this embodiment better adapts to high-density installation scenarios and better meets the docking requirements of connectors in consumer electronics or automotive applications within confined spaces. Furthermore, it is important to note that the contact segment 100 must also ensure stable contact with the docking port, guaranteeing low contact resistance and vibration resistance.

[0044] The welding segment 200 provided in this embodiment is mainly used for welding with circuit boards or wires. In this embodiment, the welding segment 200 adopts a sheet-like structure, which can increase the welding area and reduce the risk of poor soldering.

[0045] Regarding the connecting segment 300 provided in this embodiment, which serves as the connection hub between the contact segment 100 and the welding segment 200, the configuration of the connecting segment 300 ensures that the relative positions of the contact segment 100 and the welding segment 200 are fixed. Setting the connecting segment 300 as a U-shaped shell structure allows for elastic deformation during insertion and installation, ensuring a tight fit with the opposite interface. Simultaneously, the U-shaped shell structure can absorb the mechanical stress generated during insertion and removal, preventing breakage at the connection point between the contact segment 100, the welding segment 200, and the connecting segment 300. Furthermore, the U-shaped shell structure design not only reduces material usage but is also more suitable for integral stamping.

[0046] Regarding the positioning piece 310 provided in this embodiment, when the pin is inserted into the docking port, it can abut against the positioning component of the docking port to achieve assembly positioning. At the same time, the positioning piece 310 can also effectively prevent the pin from rotating or shifting to ensure the assembly effect.

[0047] In one embodiment, the contact section 100, the welding section 200, the connecting section 300, and the positioning piece 310 are integrally stamped from phosphor bronze strip. The phosphor bronze strip selected in this embodiment is a high-precision phosphor bronze strip with a smooth surface, a roughness level of 8 or higher, and a thickness tolerance controlled to approximately 0.005 mm.

[0048] In one embodiment of this application, the thickness of the phosphor bronze strip can be from 0.12 mm to 0.18 mm, the thickness tolerance of the phosphor bronze strip is ±0.005 mm, and the roughness can reach level 8 or above. In an optional embodiment, the thickness of the phosphor bronze strip can be 0.15 mm, and the roughness can reach level 8 or above. The high-precision phosphor bronze strip selected in this embodiment has a very small thickness tolerance, combined with excellent flatness, which can ensure that the high-precision phosphor bronze strip fits tightly with the stamping die, avoiding over- or under-pressure caused by uneven local thickness, and reducing problems such as cracking, deformation, and burrs. In addition, since the high-precision phosphor bronze strip has no burrs on the edges, it can ensure accurate material feeding during automated feeding, reduce downtime for adjustment due to strip misalignment, and improve the continuous running time of the stamping equipment.

[0049] In one embodiment of this application, the outer diameter of the contact segment 100 is 0.48 mm to 0.72 mm. The outer diameter of the contact segment 100 in this embodiment is that of a miniature pin, which significantly reduces the space occupied by a single pin. In a multi-row pin array, this reduces pin spacing, enabling higher density signal or current transmission, and better adapts to the increasingly miniaturized and integrated design requirements of electronic devices.

[0050] In an optional embodiment, the outer diameter of the contact segment 100 is 0.6 mm. The outer diameter of the contact segment 100 in this embodiment can be matched with the inner diameter of the socket to reserve a suitable fitting gap, which can not only ensure smooth insertion and removal, but also ensure a tight fit with the inner wall of the socket through the slight elastic deformation of the pin, resulting in a stable contact area and well meeting the requirement of low contact resistance.

[0051] Furthermore, the outer diameter of the contact section 100 is 0.6 mm. The contact section 100 is integrally stamped from high-precision phosphor bronze strip, and the thickness of the phosphor bronze strip can be 0.15 mm. In this embodiment, the sidewall thickness of the contact section 100 is 0.1 mm to 0.15 mm. Through the high elasticity of the material itself and the integrity of the integrally formed metal flow lines, it can withstand the radial pressure and bending stress during insertion and removal, effectively preventing deformation or breakage. It should also be noted that the outer diameter curvature of the contact section 100 in this embodiment is moderate. During local gold plating, the electroplating solution flows more uniformly on the surface, avoiding uneven plating thickness caused by excessive curvature, ensuring plating coverage, and improving oxidation resistance and wear resistance.

[0052] In one embodiment of this application, the cross-section of the contact segment 100 can be circular, the contact area of ​​the contact segment 100 is more uniform, the resistance stability is higher, the insertion and extraction resistance is low, the applicable scenarios are rich, the radial force is uniform, and the deformation resistance is strong.

[0053] In one embodiment of this application, the cross-section of the contact segment 100 can be rectangular, the contact area of ​​the contact segment 100 is larger, the current carrying capacity is significantly improved, the directional constraint is outstanding, the anti-rotation performance is outstanding, the rigid directional distribution is optimized for differences in anti-bending ability, the ineffective deformation in non-stressed directions is reduced, and the service life is extended.

[0054] In one embodiment of this application, the cross-section of the contact segment 100 can be polygonal. The multi-edge contact of the contact segment 100 can reduce the risk of single-point failure and significantly improve the anti-interference capability of signal transmission.

[0055] In one embodiment of this application, the outer wall surface of the contact segment 100 may be provided with a groove array, wherein the width of each groove in the groove array may be set to 5μm to 10μm, and the depth may be set to 2μm to 3μm. In this embodiment, each groove of the groove array may store lubricating grease, which can reduce the insertion and extraction friction coefficient and reduce the insertion and extraction force.

[0056] In one embodiment of this application, a bump array may be provided on the outer wall surface of the contact segment 100. In this embodiment, the bump array increases the actual number of contact points, and conductivity can still be maintained even if the outer wall of the contact segment 100 is partially worn, thereby improving the resistance to vibration interference.

[0057] In one embodiment of this application, the contact segment 100 can be formed by multiple petal-shaped pieces enclosing each other circumferentially to form an elongated columnar structure. The base segment 100 provided in this embodiment can automatically compensate for minor deviations in the opposite end interface during insertion through the elastic deformation of the petal-shaped pieces. This increases the contact area, further reduces contact resistance fluctuations, significantly buffers insertion and removal impact forces, avoids plating wear or socket deformation caused by rigid contact, and helps extend insertion and removal life.

[0058] In one embodiment of this application, a reinforcing rib 210 is further included. The reinforcing rib 210 is respectively disposed on the welding section 200 and the connecting section 300, and the reinforcing rib 210 disposed on the welding section 200 and the reinforcing rib 210 disposed on the connecting section 300 are interconnected. The reinforcing rib 210 protrudes upward from the welding section and the connecting section. In this embodiment, the welding section 200, the connecting section 300, and the reinforcing rib 210 are all integrally formed by stamping. Considering that the thickness of the strip material used in the integral stamping process is often relatively thin, providing the reinforcing rib 210 on the welding section 200 can ensure welding strength. Specifically, the reinforcing rib, which is connected to the welding section 200 and the connecting section 300, can enhance the overall rigidity of the welding section 200. Under the high temperature of welding, the thermal expansion of the strip material will cause slight deformation, while the reinforcing rib, through continuous metal flow lines, can effectively control the warpage of the welding section 200, improve the resistance to thermal deformation, and ensure welding alignment accuracy. Secondly, the reinforcing ribs can also disperse welding stress, prevent root fracture, enhance the load-bearing capacity of the weld surface, and better adapt to mechanical assembly forces.

[0059] In one optional embodiment, multiple reinforcing ribs 210 may be arranged, with adjacent reinforcing ribs 210 arranged in parallel. The extension lengths of the multiple reinforcing ribs may be the same or different, and no specific limitation is made here.

[0060] In one embodiment of this application, the opening of the connecting segment 300 is located at the upper end of the connecting segment 300; the upper end of the side wall of the connecting segment 300 is provided with a plurality of limiting protrusions 320 folded outward.

[0061] As an optional embodiment, the number of limiting bosses 320 is four, symmetrically arranged on the upper ends of the two side walls of the connecting section 300, as shown in the reference. Figure 1 As shown.

[0062] In one embodiment of this application, one end of the positioning piece 310 is connected to the bottom wall of the connecting section 300, and the other end of the positioning piece 310 is inclined upward and the positioning piece 310 is higher than the contact section 100. In this embodiment, the top of the positioning piece 310 is set higher than the contact section, so that when the pin is inserted into the housing, the positioning piece 310 will contact the housing structure before the contact section 100. This setting can avoid the contact section 100 from being directly damaged by collision due to insertion deviation, and in particular, it can protect the gold plating layer of the contact section 100 from scratches.

[0063] Furthermore, the tilt angle of the positioning piece 310 can be set to 45° to 60°. When the pin is inserted into the housing, the tilted positioning piece 310 can form a smooth fit with the inner wall of the housing, automatically correcting minor radial deviations of the pin. Compared to smaller or larger tilt angles, the tilt angle set in this embodiment can reduce insertion resistance and better adapt to the high-speed insertion requirements of automated assembly lines.

[0064] In one embodiment of this application, the contact segment 100 is partially gold-plated, and the soldering segment 200 is covered with a matte tin layer. In this embodiment, gold plating is only applied to critical areas of the contact segment 100, significantly reducing gold consumption and material costs; simultaneously, it avoids the problem of poor solder wetting in the soldering segment 200 caused by gold plating in non-contact areas. After partial gold plating of the contact segment 100 in this embodiment, the contact resistance is stably reduced, better meeting the requirements of high-frequency signal transmission, improving wear resistance, and better adapting to high-frequency plugging and unplugging applications. The matte tin layer of the soldering segment 200 can absorb thermal stress during soldering, preventing tin layer cracking; and the good ductility of the tin layer at room temperature allows it to withstand minor deformations after pin soldering, which helps improve soldering strength.

[0065] This embodiment achieves continuous electroplating with segmented plating in a single feed. Specifically, it includes: First, pretreatment purification, sequentially using ultrasonic degreasing and sulfuric acid pickling to activate the surface. Second, masking the non-gold-plated areas of the solder section 200 and contact section 100, exposing only the gold-plated area of ​​the contact section 100. Conversely, masking the areas other than the matte tin plating area of ​​the solder section, exposing only the matte tin plating area of ​​the solder section. Third, segmented electroplating controls the gold plating of the contact section and the matte tin plating of the solder section 200. Finally, post-treatment strengthening is performed.

[0066] This embodiment achieves a combination of conductive and wear-resistant contact sections with easy and reliable soldering by using automated control of continuous electroplating, precise control and performance enhancement of local gold plating on the contact section, and optimized solderability of matte tin plating on the soldering section. It also achieves the goal of high efficiency and low cost, making it particularly suitable for scenarios such as consumer electronics and automotive electronics where there are stringent requirements for connector performance and cost.

[0067] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0068] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0070] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A pin, characterized in that, include: The contact segment (100) has a slender columnar structure; Welding segment (200), said welding segment (200) having a sheet-like structure; and A connecting section (300) is connected between the contact section (100) and the welding section (200); the connecting section (300) has a U-shaped shell structure; a positioning piece (310) is provided on the side of the connecting section (300) near the contact section (100), and the positioning piece (310) is inclined. The contact section (100), the welding section (200), the connecting section (300), and the positioning piece (310) are integrally stamped.

2. The pin according to claim 1, characterized in that, The contact section (100), the welding section (200) and the connecting section (300) are integrally stamped from phosphor bronze strip.

3. The pin according to claim 2, characterized in that, The thickness of the phosphor bronze strip is 0.12 mm to 0.18 mm, and the thickness tolerance of the phosphor bronze strip is ±0.005 mm.

4. The pin according to claim 1, characterized in that, The outer diameter of the contact section (100) is 0.48 mm to 0.72 mm.

5. The pin according to claim 1, characterized in that, The cross-section of the contact segment (100) is at least one of a circle, a rectangle, or a polygon.

6. The pin according to claim 1, characterized in that, Also includes: Reinforcing ribs (210) are respectively disposed on the welding section (200) and the connecting section (300), and the reinforcing ribs (210) disposed on the welding section (200) and the reinforcing ribs (210) disposed on the connecting section (300) are connected to each other.

7. The pin according to claim 1, characterized in that, The opening of the connecting section (300) is located at the upper end of the connecting section (300); the upper end of the side wall of the connecting section (300) is folded outward to provide multiple limiting bosses (320); the bottom wall of the connecting section (300) is connected to the welding section (200).

8. The pin according to claim 7, characterized in that, One end of the positioning piece (310) is connected to the bottom wall of the connecting section (300), and the other end of the positioning piece (310) is inclined upward and the positioning piece (310) is higher than the contact section (100).

9. The insert according to any one of claims 1 to 8, characterized in that, The contact section (100) is partially plated with gold.

10. The insert according to any one of claims 1 to 8, characterized in that, The welding section (200) is provided with a matte tin layer.

Images