Spring connector and manufacturing method thereof

Abstract

The invention provides a spring connector and a manufacturing method thereof, wherein the bottom surface of a pipe body can be used as a contact point, and the degree of freedom of plating treatment is large. The spring connector has: a contact pin; a conductive tube body which slidably accommodates the contact pin and enables the front end portion of the contact pin to protrude; and a spring that is disposed in the tube body and that urges the contact pin in the direction in which the contact pin protrudes from the tube body, the tube body having a bottomless first tube body part and a bottomed second tube body part, the bottom of the second tube body part having a substantially planar shape, and a part of the first tube body part being housed inside the second tube body part.

Description

Technical Field

[0001] This invention relates to spring connectors and methods for manufacturing the same. Background Technology

[0002] In the typical construction of spring connectors, when the bottom surface of the tube is used as the contact point, the tube slidably accommodates the contact pin. To prevent the contact pin from falling out, the tube is clamped. For plating with a hardness higher than Au, if clamping is performed after plating the tube, problems such as breakage of the clamping part may occur. Therefore, the plating options are limited to Au plating. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2000-182701 Summary of the Invention

[0004] One object of the present invention is to provide a spring connector and a method thereof that allows for the use of the bottom surface of the tube as a contact point and offers a high degree of freedom in plating treatment. Other objects of the present invention will become clear from the description herein.

[0005] One embodiment of the present invention is a spring connector, which has: Contact pin; A conductive tube that slidably accommodates the contact pin and allows the front end of the contact pin to protrude; and A spring, disposed within the tube, applies force in the direction that causes the contact pin to protrude from the tube. The tube has a bottomless first tube section and a bottomed second tube section, the bottom of which is approximately planar. A portion of the first tube body is housed inside the second tube body.

[0006] Another embodiment of the present invention is a method for manufacturing a spring connector. A contact pin and a spring are disposed within a conductive tube, and the contact pin is slidable by the spring. The manufacturing method of the spring connector includes: The first manufacturing step involves forming a through hole with a small diameter surface on the first columnar metal component by drilling, thereby creating the first tube body portion. This small diameter surface serves as the anti-detachment part of the contact pin. The second manufacturing process involves drilling holes in the second columnar metal component to create a hole with a roughly planar bottom surface, thus forming the second tube body. The pressing process involves pressing the first tube portion into the hole portion and integrating the first tube portion and the second tube portion to form the tube body.

[0007] According to the above-described form of the present invention, a spring connector and its manufacturing method can be realized, which can utilize the bottom surface of the tube as a contact point and has a high degree of freedom in plating treatment. Attached Figure Description

[0008] Figure 1 This is a longitudinal sectional view showing the spring connector 1 according to the first embodiment of the present invention. Figure 2 This is a three-dimensional view of spring connector 1 viewed from the front. Figure 3 This is a three-dimensional view of spring connector 1 viewed from the rear. Figure 4 This is an explanatory diagram showing the manufacturing process of the inner tube of the first tube body used in the first embodiment. Figure 5 Through Figure 4 The longitudinal sectional view of the inner tube obtained during the manufacturing process of the inner tube section. Figure 6 This is an explanatory diagram showing the manufacturing process of the outer tube of the second tube body used in the first embodiment. Figure 7 Through Figure 6 The longitudinal sectional view of the outer tube obtained from the manufacturing process of the outer tube section. Figure 8 This is a longitudinal sectional view of the tube body used in the first embodiment, which is formed by pressing the inner tube and the outer tube into one piece. Figure 9 This is an explanatory diagram showing the press-in portion of the outer tube section in the spring connector 1 (where the spring is omitted from the diagram), with the outer tube section shown in cross-section and the inner tube section's outer periphery pressed in. Figure 10 This is an explanatory diagram showing an example of the use of spring connector 1. Figure 11 This is an external view showing the spring connector 2 according to the second embodiment of the present invention. Figure 12A This is a longitudinal sectional view of the inner tube portion according to the third embodiment of the present invention. Figure 12B This is a longitudinal sectional view of a tube body in which the inner tube and outer tube of the third embodiment are pressed into one piece. Figure 12C This is a longitudinal sectional view of the spring connector 3 of the third embodiment (in which the illustration of the spring is omitted). Figure 13A This is a longitudinal sectional view of the tube body of a conventional spring connector. Figure 13B This is a longitudinal sectional view of a conventional spring connector (the spring is omitted from the diagram, before the clamping process). Detailed Implementation

[0009] use Figures 1 to 9 The first embodiment of the spring connector and its manufacturing method according to the present invention will be described. First, using... Figures 1-3 This explains the structure of the spring connector. For example... Figure 1 As shown, the spring connector 1 includes: a conductive contact pin 10; a conductive tube 20 that slidably accommodates the conductive contact pin 10; and a spring 30 disposed within the conductive tube 20, which applies force in a direction that causes the conductive contact pin 10 to protrude from the conductive tube 20. Here, viewed from the front... Figure 1 In this case, the left direction is defined as the front end direction of spring connector 1, and the right direction is defined as the rear end direction.

[0010] The conductive contact pin 10 is cylindrical, having a large-diameter portion 11 that can slide within the conductive tube 20, and a small-diameter portion 12 that can protrude from the tube 20. The contact pin 10 is, for example, coated with a metal layer based on Au plating on the surface of a copper alloy. The front end of the contact pin 10 is, for example, hemispherical, forming a contact point of the spring connector 1. The portion of the contact pin 10 that forms the boundary between the large-diameter portion 11 and the small-diameter portion 12 is connected by a step, and the step difference in the inclined shape between the two abuts against the rear end side compared to the small-diameter surface 21b of the inner tube portion 21, thereby preventing the contact pin 10 from falling off the inner tube portion 21. The rear end side of the contact pin 10 has a rear end surface 11a, which is an inclined surface inclined relative to the axial direction. One end of the spring 30 abuts against the rear end surface 11a. If the contact pin 10 is pushed in a predetermined amount from the opening at one end of the inner tube 21, the force of the spring 30 will be applied to the rear end face 11a, causing the contact pin 10 to tilt and press the side of the large diameter portion 11 of the contact pin 10 against the inner surface of the inner tube 21. Thus, the inner tube 21 and the contact pin 10 reliably contact and conduct. Furthermore, the rear end face of the contact pin 10 is not limited to an inclined surface; it can also be configured to have a cavity with a portion of the spring 30 located inside the cavity.

[0011] The conductive tube 20 has a segmented structure, having an inner tube portion 21 as a first tube portion and an outer tube portion 25 as a second tube portion.

[0012] The inner tube 21 is conductive and has a through-hole structure with openings at both ends. For example, the inner circumferential surface of the inner tube 21 has a shape when viewed from the front. Figure 1In this case, there is a large-diameter surface 21a and a small-diameter surface 21b located in the vertical direction with a larger distance (hereinafter referred to as "distance") between one inner circumferential surface and another inner circumferential surface. The large-diameter surface 21a is the portion that can slidably accommodate the large-diameter portion 11 of the conductive contact pin 10 and accommodate the spring 30. The small-diameter surface 21b is located at the front end side of the inner tube portion 21 and serves as an anti-dislodgement portion for the conductive contact pin 10. That is, the small-diameter surface 21b forms a distance at the front end of the inner tube portion 21 that is smaller than the distance formed by the large-diameter surface 21a. The distance formed by the small-diameter surface 21b is smaller than the diameter of the outer diameter portion 11 of the contact pin 10 and larger than the diameter of the small-diameter portion 12 of the contact pin 10. Furthermore, the contact pin 10 passes through the portion that forms the boundary between the large-diameter portion 11 and the small-diameter portion 12 ( Figure 1 The portion with the inclined shape shown abuts against the rear end side compared to the small-diameter surface 21b in the inner tube portion 21 to prevent it from falling off from the inner tube portion 21. The inner tube portion 21 has an insertion portion 22 that serves as a portion entering the inner side of the outer tube portion 25. The outer peripheral surface of the insertion portion 22 has an outer diameter that can be pressed into the inner circumference of the outer tube portion 25. The insertion portion 22 has a chamfered portion 22a formed at its rear end, and the portion of the outer peripheral surface adjacent to the chamfered portion 22a becomes... Figure 9 The strip-shaped press-in portion 22b is shown. The press-in portion 22b is the part that presses against the inner circumferential surface 26a of the hole 26 of the outer tube portion 25 when metal is pressed in (metal parts are pressed into each other). After being pressed in, the press-in portion 22b generates the holding force required to maintain the connection between the inner tube portion 21 and the outer tube portion 25.

[0013] The outer tube portion 25 has a bottomed hole portion 26 that accommodates the rear portion of the inner tube portion 21. The hole portion 26 has an inner circumferential surface 26a and a bottom surface 26b, the bottom surface 26b being a generally planar shape (generally flat shape) perpendicular to the inner circumferential surface 26a. The rear end face 27 of the outer tube portion 25 is generally planar and forms a pad that becomes another contact of the spring connector 1, capable of contacting the convex contact on the object side.

[0014] Next, use Figure 4 as well as Figure 5 This describes the manufacturing method of the inner tube section 21. (By...) Figure 4 As shown, the inner tube 21 is manufactured by drilling a first cylindrical metal part (e.g., copper alloy) 50, which has undergone the required outer peripheral surface machining and cutting machining corresponding to the outer peripheral surface shape and length of the inner tube 21, using a stepped drill bit 55. Figure 5As shown, by drilling with a stepped drill bit 55, a through hole with a large-diameter surface 21a and a small-diameter surface 21b (including an inclined shape) is formed on the first cylindrical metal part 50. The front end of the small-diameter surface 21b serves as an anti-detachment part for the contact pin 10. That is, it is possible to obtain the shape of the inner tube portion 21 having a large-diameter surface 21a and a small-diameter surface 21b on its inner circumferential surface. Because the small-diameter portion 21b can be formed by drilling with a stepped drill bit 55, clamping is not required, and problems such as breakage are avoided.

[0015] use Figure 6 as well as Figure 7 This explains the manufacturing method of the outer tube section 25. (By...) Figure 6 As shown, the second cylindrical metal component (e.g., copper alloy) 60, for which the required outer peripheral surface machining and cutting machining have been performed corresponding to the outer peripheral surface shape and length of the outer tube 25, is manufactured through drilling using a special drill bit 65. Figure 7 As shown, by drilling with a special drill bit 65, a bottomed hole 26 is formed on the second cylindrical metal member 60 to accommodate the rear portion of the inner tube 21. That is, it is possible to obtain the shape of the outer tube 25 with the hole 26 having a bottom surface 26b that is a plane perpendicular to the inner circumferential surface 26a.

[0016] The inner tube section 21 and the outer tube section 25 can be obtained by applying a metal plating layer based on Au plating or the like to the surface of a metal part such as a copper alloy after drilling. The metal plating layers of the inner tube section 21 and the outer tube section 25 can be of the same type or can be metal plating layers of different types.

[0017] Figure 8 This is an example of the tube body 20 when this embodiment is applied to a low-back spring connector. (By...) Figure 8 As shown, the tube body 20, formed by pressing the inner tube portion 21 and the outer tube portion 25 together, has a total length of 2.3 mm. By machining the bottom surface 26b of the hole portion 26 flat, the thickness of the bottom surface of the outer tube portion 25 can be uniformly reduced. Therefore, sufficient storage space can be ensured for the large-diameter portion 11 of the contact pin 10 and the spring 30 inside the tube body 20, making it easier to achieve a low profile for the spring connector 1.

[0018] On the other hand, if conventional drilling is used, and a hole 26 is formed in the outer tube portion 25, the bottom surface of the hole 26 will not be a flat surface but a conical concave surface, thus it will not become like... Figure 8 The bottom surface 26b is as shown. Therefore, the space inside the tube for accommodating the large-diameter portion 11 of the contact pin 10 and the spring 30 is larger than that inside the tube. Figure 8 The situation is small, which is not conducive to low-profile design.

[0019] The spring 30 is, for example, a helical spring formed by shaping common metal wires such as piano wire and stainless steel wire into a spiral shape. One end abuts against the inclined rear end face 11a of the large diameter portion 11 of the contact pin 10. The other end abuts against the bottom surface 26b of the inner side of the outer tube portion 25. The spring 30 applies force to the contact pin 10 and the outer tube portion 25 in a direction that causes them to separate from each other.

[0020] In the assembly of the spring connector 1, after the large-diameter portion 11 of the contact pin 10 and the spring 30 are positioned inside the inner tube portion 21, as follows: Figure 9 In this way, a pressing process is performed to press the rear side of the inner tube 21 into the hole 26 of the outer tube 25, so that the inner tube 21 and the outer tube 25 are integrated to form the tube body 20. By pressing the inner tube 21 and the outer tube 25 into one piece to form the tube body 20, the spring connector 1 is completed.

[0021] Figure 9 This indicates that the outer tube section 25 is in cross-section and the inner tube section 21 is pressed into the outer tube section 25. For example... Figure 9 As shown, to facilitate and ensure reliable pressing of the inner tube portion 21 into the outer tube portion 25 during the pressing process, a chamfered portion 22a is formed at the rear end of the insertion portion 22 of the inner tube portion 21. Furthermore, the outer peripheral surface portion adjacent to the chamfered portion 22a of the inner tube portion 21 at its rear end forms a strip-shaped pressing portion 22b. The pressing portion 22b is the portion that presses against the inner peripheral surface of the hole portion 26 of the outer tube portion 25 when metal is pressed in (metal parts are pressed into each other). At this time, the length of the pressing portion 22b in the depth direction is set to a length that generates sufficient holding force when pressed into the hole portion 26.

[0022] like Figure 1 As shown, in the completed spring connector 1, the spring 30 is disposed between the inclined rear end face 11a of the large diameter portion 11 of the contact pin 10 and the bottom surface 26b of the inner side of the outer tube portion 25. By pushing the inclined rear end face 11a of the large diameter portion 11, an upward lateral pressure is generated to contact the inner surface of the tube body 20, ensuring good electrical contact between the contact pin 10 and the tube body 20.

[0023] Figure 10 This is an explanatory diagram showing an example of the use of the spring connector 1. In this case, the spring connector 1 is installed in the mounting hole 71 of the resin or other insulating housing 70 of a small electronic device. For example, by pressing the front end of the inner tube 21 into the small diameter portion 71a of the mounting hole 71, the spring connector 1 can be easily installed in the insulating housing 70. After the spring connector 1 is installed in the insulating housing 70, for example, the contact pin 10 of the spring connector 1 can be used as an internal contact, and the rear end face 27 of the outer tube 25 can be used as an external contact (pad).

[0024] According to this embodiment, the following effects can be achieved.

[0025] (1) The conductive tube 20, in which the contact pin 10 can be slidably accommodated and the front end of the contact pin 10 can protrude, is configured to have an inner tube portion 21 and a bottomed outer tube portion 25 that accommodates the inner tube portion 21 inside. Therefore, the rear end face 27 of the outer tube portion 25 can be used as a contact point (pad). In this case, the plating of the outer tube portion 25 needs to be thickened so that the substrate will not be exposed even if the plating wears off. Therefore, the length of the outer tube portion 25 is shortened, the material cost is lower, and the machining of the hole portion 26 is easier, thus contributing to cost reduction.

[0026] (2) If Figure 13A as well as Figure 13B In the conventional tube body 20A shown, to prevent the contact pin 10 from falling off, the tube opening is clamped after the spring 30 and the contact pin 10 are inserted. However, from the viewpoint of preventing the clamping part from breaking, the optional metal plating is limited to Au plating. In this embodiment, after the inner tube portion 21 with the small diameter portion 21b and the outer tube portion 25 are plated independently, the contact pin 10 and the spring 30 are inserted into the inner tube portion 21 and then assembled. Therefore, it is not limited to Au plating, and plating corresponding to the application and performance requirements can be performed, increasing the freedom of metal plating types.

[0027] (3) The inner tube portion 21 and the outer tube portion 25 can be plated with different types of metal plating. For example, the pads that become the contacts of the spring connector 1 in the outer tube portion 25 are the rear end face, so the Au plating is formed thickly. The inner tube portion 21 has a through structure with openings at both ends, which provides good plating adhesion, and thus a thin plating can be formed. This helps to reduce the material cost and processing cost of plating.

[0028] (4) The outer tube portion 25 has a hole portion 26 that accommodates a portion of the inner tube portion 21. The bottom surface 26b of the hole portion 26 is flat, which increases the accommodating space for the large diameter portion 11 of the contact pin 10 and the spring 30 inside the tube body 20. That is, it is beneficial to reduce the back profile of the spring connector 1. The machining process of making the bottom surface 26b of the hole portion 26 flat can be achieved by special drilling. If conventional drilling is used, the bottom surface of the hole portion 26 is a conical concave surface, and the spring 30 will be in contact with the inclined surface of the conical concave surface, resulting in a smaller accommodating space.

[0029] (5) The inner circumferential surface of the inner tube 21 has a large diameter portion 21a and a small diameter portion 21b on the front end side of the anti-detachment portion that serves as the contact pin. However, the machining to form the large diameter portion 21a and the small diameter portion 21b can be achieved by step drilling. Therefore, the pressing process after plating is not required, and problems such as breakage that occur during the pressing process can be eliminated.

[0030] (6) The tube body 20 is configured as a combination of an inner tube section 21 and an outer tube section 25, thereby allowing the inner tube section 21 and the outer tube section 25 to be formed by drilling. In addition, the outer tube section 25 has a hole section 26 that accommodates a portion of the inner tube section 21. The inner tube section 21 is pressed into the hole section 26 to integrate the inner tube section 21 and the outer tube section 25, thereby forming the tube body 20. Therefore, additional parts and additional machining are not required for integrating the inner tube section 21 and the outer tube section 25.

[0031] Figure 11 This illustrates the second embodiment of the present invention. In this case, the outer tube portion 25 of the spring connector 2 has a groove 28 surrounding its outer peripheral surface, and a waterproof O-ring 80 is embedded in the groove 28. Other configurations are substantially the same as those in the first embodiment described above, and the same or equivalent constituent elements and components are labeled with the same reference numerals and descriptions are omitted.

[0032] According to this second embodiment, based on the effects of the first embodiment described above, when the spring connector 2 is installed in the mounting hole of the insulating housing of the electronic device, the waterproofness between the insulating housing and the spring connector 2 can be improved.

[0033] Figure 8 The example given illustrates the application of the invention to a low-back spring connector, specifically the tube body 20. However, the invention can also be applied to other types of connectors. Figure 12A , Figure 12B as well as Figure 12C The elongated spring connector 3 is shown as a third embodiment of the present invention. In this third embodiment, the tube body 20 is elongated, but other components are substantially the same as those in the first embodiment described above. Identical or equivalent components and parts are labeled with the same reference numerals and descriptions are omitted.

[0034] For example, such as Figure 13A as well as Figure 13B In the conventional long-length spring connectors shown, because one end of the tube 20A is closed, its length is limited in order to allow for proper metal plating onto the inner surface of the tube. However, in... Figure 12A , Figure 12B as well as Figure 12C In this third embodiment, the inner tube 21 has a through-hole structure with openings at both ends, resulting in good plating adhesion. Even when the inner tube 21 is long, metal plating to the inner surface of the inner tube 21 can be performed well. Furthermore, the outer tube 25 can be used interchangeably even when manufacturing spring connectors of various lengths, thus reducing manufacturing costs compared to the past in multi-variety, low-volume production.

[0035] The embodiments and variations of the present invention have been described above with reference to the accompanying drawings. However, these are merely illustrative examples of the present invention, and various other configurations may also be employed.

[0036] In the spring connector of the present invention, the shape and size of the contact pin, and the shape and size of the first and second tube body portions constituting the tube body, can be appropriately changed according to the application. Furthermore, Au plating is used as an example of the metal plating formed on the contact pin, the first and second tube body portions, but there is no limitation on the type of metal plating, which is a corrosion-resistant, high-conductivity metal such as Pd, PdNi, Pt, or Ag, other than Au plating. Moreover, these metal platings can be implemented in multiple layers. When the metal plating is formed in multiple layers, by appropriately selecting the metal platings, improvements in corrosion resistance can be achieved.

[0037] According to this specification, the following types of spring connectors and their manufacturing methods are provided.

[0038] (Pattern 1) Type 1 is a spring connector, which has: Contact pin; A conductive tube that slidably accommodates the contact pin and allows the front end of the contact pin to protrude; and A spring, disposed within the tube, applies force in the direction that causes the contact pin to protrude from the tube. The tube has a bottomless first tube section and a bottomed second tube section, the bottom of which is approximately planar. A portion of the first tube body is housed inside the second tube body.

[0039] According to the above-described configuration 1, the conductive tube has a bottomless inner tube portion and a bottomed outer tube portion that houses the inner tube portion inside. The bottom of the outer tube portion is approximately planar, so the rear end face of the outer tube portion can be used as a contact (pad).

[0040] (Style 2) In the second configuration, the plating on the first tube body and the plating on the second tube body are metal platings of different types.

[0041] According to the above-mentioned pattern 2, there are more options for metal coatings. For example, an Au coating with excellent corrosion resistance can be formed on the second tube body, and a low-cost metal coating can be formed on the first tube body.

[0042] (Pattern 3) In configuration 3, the second tube portion has a hole that accommodates a portion of the first tube portion.

[0043] According to the above-described configuration 3, the space for accommodating the contact pin and spring within the tube containing the first tube portion and the second tube portion can be increased. Therefore, this is beneficial for reducing the back profile.

[0044] (Pattern 4) In configuration 4, the inner circumferential surface of the first tube body has a large diameter surface and a small diameter surface, and the small diameter surface is located at the front end of the first tube body and serves as the anti-detachment part of the contact pin.

[0045] Based on the above-described pattern 4, the machining to form the large-diameter and small-diameter surfaces can be achieved, for example, through stepped drilling. Therefore, the pressing process after plating is unnecessary, thus eliminating problems such as breakage that occur during the pressing process.

[0046] (Pattern 5) Pattern 5 is characterized by an O-ring being disposed on the outer peripheral surface of the second tube body.

[0047] Based on the above-described pattern 5, it is possible to improve the waterproofing when installing a spring connector on the target device.

[0048] (Pattern 6) In configuration 6, the second tube portion has a hole for accommodating a portion of the first tube portion, and the first tube portion is pressed into the hole to integrate the first tube portion and the second tube portion.

[0049] According to the above-described pattern 6, metal pressing is used, so there is no need for additional parts and additional processing to integrate the inner tube 21 and the outer tube 25.

[0050] (Pattern 7) Version 7 is a method for manufacturing a spring connector, wherein a contact pin and a spring are disposed within a conductive tube, and the contact pin is slidable by the spring. The method for manufacturing the spring connector includes: The first manufacturing step involves forming a through hole with a small diameter surface on the first columnar metal component by drilling, thereby creating the first tube body portion. This small diameter surface serves as the anti-detachment part of the contact pin. The second manufacturing process involves drilling holes in the second columnar metal component to create a hole with a roughly planar bottom surface, thus forming the second tube body. The pressing process involves pressing the first tube portion into the hole portion and integrating the first tube portion and the second tube portion to form the tube body.

[0051] According to the above-described embodiment 7, the inner tube and outer tube are formed separately by drilling, and then the inner tube and outer tube are pressed together to form a tube body. Therefore, it is not necessary to form a contact pin to prevent detachment in the tube body through a pressing process. Thus, defects such as the cracking of the metal plating that occurs during the pressing process can be avoided. In addition, there is no need for additional parts or additional processing for integrating the inner tube and outer tube. Explanation of reference numerals in the attached figures

[0052] 1, 2 Spring Connectors 10 Contact pins 20 tube body 21 Internal Management Department 21a Large diameter surface 21b Small Diameter Surface 22 Insertion section 22a Chamfered part 22b Press-in section 25. Ministry of Foreign Affairs 26 Holes 26a Inner circumferential surface 26b bottom surface 30 Springs 50 First cylindrical metal component 55 Stepped Drill Bit 60 First cylindrical metal component 65 Special Drill Bits 70 Insulating Housing 71 mounting holes 80 O-ring.

Claims

1. A spring connector, wherein, have: Contact pin; A conductive tube that slidably accommodates the contact pin and allows the front end of the contact pin to protrude. and A spring, disposed within the tube, applies force in the direction that causes the contact pin to protrude from the tube. The tube has a bottomless first tube section and a bottomed second tube section, the bottom of which is approximately planar. A portion of the first tube body is housed inside the second tube body.

2. The spring connector according to claim 1, wherein, The plating on the first tube body and the plating on the second tube body are different types of metal plating.

3. The spring connector according to claim 1 or 2, wherein, The second tube portion has a hole for accommodating a portion of the first tube portion.

4. The spring connector according to claim 1 or 2, wherein, The inner circumferential surface of the first tube body has a large diameter surface and a small diameter surface. The small diameter surface is located at the front end of the first tube body and serves as the anti-detachment part of the contact pin.

5. The spring connector according to claim 1 or 2, wherein, An O-ring is provided on the outer circumferential surface of the second tube body.

6. The spring connector according to claim 1 or 2, wherein, The second tube portion has a hole for accommodating a portion of the first tube portion, and the first tube portion is pressed into the hole to integrate the first tube portion and the second tube portion.

7. A method for manufacturing a spring connector, comprising arranging a contact pin and a spring within a conductive tube, wherein the contact pin is slidable by the spring, wherein... The method for manufacturing the spring connector includes: The first manufacturing step involves forming a through hole with a small diameter surface on the first columnar metal component by drilling, thereby creating the first tube body portion. This small diameter surface serves as the anti-detachment part of the contact pin. The second manufacturing process involves drilling holes in the second columnar metal component to create a hole with a roughly planar bottom surface, thus forming the second tube body. The pressing process involves pressing the first tube portion into the hole portion and integrating the first tube portion and the second tube portion to form the tube body.

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