A miniature double-ended floating pogo pin connector and method of assembly thereof

Abstract

This invention discloses a miniature double-ended floating button connector and its assembly method, relating to the field of electronic connector technology. The connector includes an upper base, a lower base, connecting nuts, protective caps, and button contacts. The two ends of the button contacts are floatingly mounted in receiving holes in the upper and lower bases, respectively. Protective caps are respectively fitted onto the two ends of the button contacts and slidably fitted into the receiving holes. The protective caps and button contacts together form conductive contacts. The upper and lower bases are mated together and multiple connecting nuts are inserted. The connecting nuts are interference-fitted with the upper and lower bases and riveted for fixation. A threaded hole is provided in the center of the connecting nut for engaging with external screws to lock the printed circuit board. This invention solves the problems of existing button connectors having large space requirements and lacking double-ended floating tolerance.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and in particular to a miniature double-ended floating button connector and its assembly method. Background Technology

[0002] With the rapid development of industries such as manned spaceflight, satellite communications, automobile manufacturing, and consumer electronics, electronic devices are gradually moving towards miniaturization, lower profile, integration, and multi-functionality. Signal interconnection between printed circuit boards (PCBs) has become a key aspect of system design. Traditional board-to-board connectors (such as board-to-board connectors, pin headers, and socket headers) typically require the mating action of pins and sockets to achieve electrical connection. This process is cumbersome, space-consuming, and difficult to disassemble, and requires high installation precision, making it unsuitable for signal transmission scenarios in confined spaces with tightly packed components.

[0003] Button connectors are connectors based on elastic braided metal wire bundles (i.e., buttons) as contacts. They offer advantages such as solderlessness, low profile, long lifespan, vibration resistance, and no mating force, and are widely used in signal transmission for board-to-board vertical interconnects. Button connectors do not require traditional pin and socket mating; instead, they directly and elastically press against pads on the PCB, without damaging the PCB or BGA solder balls. They offer significant advantages such as quick assembly / disassembly, miniaturization, and long lifespan.

[0004] However, existing button connectors still have the following shortcomings in practical applications: First, to achieve reliable locking between the connector and the PCB board, conventional button connectors typically require a flange and screws. The presence of the flange significantly increases the overall space occupied by the connector, making it unsuitable for applications in confined spaces with tightly packed components and minimal inter-board spacing (e.g., board spacing ≤ 5mm).

[0005] Secondly, most existing button connectors are single-ended floating structures, meaning only one end has elastic floating capability while the other end is fixed. This makes them less adaptable to situations with large tolerances in the mounting height of the PCBs at both ends or thermal expansion mismatches, easily leading to poor contact and affecting the stability of signal transmission.

[0006] Therefore, developing a flangeless, threaded mounting hole-equipped, double-ended floating miniature button connector is of great significance for promoting the miniaturization, integration, and lightweighting of electronic devices. Summary of the Invention

[0007] The main objective of this invention is to provide a miniature double-ended floating button connector and its assembly method, aiming to solve at least one of the above-mentioned technical problems.

[0008] To achieve the above objectives, this invention proposes a miniature double-ended floating button connector, comprising an upper base, a lower base, connecting nuts, protective caps, and button contacts. The two ends of the button contacts are respectively floatingly mounted in corresponding receiving holes in the upper and lower bases. The protective caps are respectively sleeved on both ends of the button contacts, and the protective caps slide in fit with the receiving holes of the upper and lower bases. The upper and lower bases are mated together and multiple connecting nuts are inserted, with the connecting nuts respectively interference-fitted with the upper and lower bases and riveted for fixation. A threaded hole is provided at the center of each connecting nut, which is used to engage with an external screw to lock the connector to the printed circuit board.

[0009] Furthermore, the upper base is provided with a plurality of first mounting holes, each of which is a stepped hole comprising an upper section and a lower section. The upper section is a square countersunk hole, and the lower section is a round hole. The lower base is provided with a plurality of second mounting holes, each of which is a round hole. A receiving groove is provided on the lower end face of the lower base. The connecting nut comprises, from top to bottom, a square head, a main body, and a riveted part. The main body is interference-fitted with the lower section and the second mounting holes, and the square head is embedded in the upper section. The riveted part is secured in the receiving groove after being riveted.

[0010] Furthermore, the height of the square head is H, and the depth of the upper hole is L; satisfying: L≥H.

[0011] Furthermore, two first guide posts are integrally formed on the top surface of the upper base for engaging with guide holes on the printed circuit board. The top end of each first guide post is a tapered head.

[0012] Furthermore, two second guide posts are integrally formed on the bottom surface of the lower base for engaging with guide holes on the printed circuit board. The lower end of the second guide post is configured as a tapered head.

[0013] Furthermore, the upper base and the lower base are injection molded from an insulating material. The insulating material is one of liquid crystal polymer, polyetheretherketone, or polyphenylene sulfide.

[0014] The present invention also provides an assembly method for the above-mentioned miniature double-ended floating button connector, comprising the following steps: S1. Place the protective caps on the outside of both ends of the button contact piece to form a contact assembly; S2. Insert the multiple contact parts obtained in step S1 into the receiving holes of the lower base, and then mate the upper base with the top surface of the lower base. S3. Press the connecting nut into the corresponding mounting holes of the upper and lower bases from top to bottom to form an interference fit; S4: The connecting nut is riveted by a riveting tool to fix it axially in the upper and lower bases.

[0015] Furthermore, in step S3, when pressing in the connecting nut, the square head of the connecting nut is required to be completely sunk into the upper hole of the upper base, so that the top surface of the connecting nut is not higher than the top surface of the upper base.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: 1. Minimal space occupation: The present invention adopts an upper and lower base docking structure. The connecting nut is directly embedded in the base through interference fit and riveting, so that the base itself is threaded. There is no need to set up an additional flange. The overall structure is compact, which is conducive to achieving miniaturization. It can be easily applied to narrow scenarios where components are closely arranged and the distance between boards is very small.

[0017] 2. Double-ended floating design with strong tolerance: The two ends of the button contact are floatingly installed in the receiving holes of the upper and lower bases respectively. The protective cap slides into the receiving hole, allowing both ends of the button contact to float independently axially. When there are installation height tolerances or thermal expansion deformations on the PCB boards at both ends, the double-ended floating structure can automatically adapt and always maintain reliable elastic contact pressure, avoiding poor contact caused by assembly tolerances or temperature changes, and ensuring stable signal transmission.

[0018] 3. Reliable fixing of the connecting nut: The connecting nut forms an interference fit with the lower hole section of the upper base and the second mounting hole of the lower base, providing radial fixation. Simultaneously, the square head of the connecting nut is embedded in the square countersunk hole of the upper base, preventing rotation. The riveted part, after riveting, is secured in the receiving groove of the lower base. The square head and the riveting structure together achieve axial fixation of the connecting nut. This triple fixing structure ensures that the connecting nut will not loosen, rotate, or fall off during repeated assembly and disassembly, greatly improving the service life and reliability of the connector.

[0019] 4. Guide post design for high installation efficiency: Guide posts are provided on both the top surface of the upper base and the bottom surface of the lower base. The top / bottom of the guide posts are tapered, facilitating quick alignment and insertion with the guide holes on the PCB board. This enables rapid positioning and installation of the connector to the PCB board, significantly improving installation efficiency. Simultaneously, the guide post structure also facilitates gripping and positioning by automated equipment (such as pick-and-place machines and robotic arms), promoting automated production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the miniature double-ended floating button connector provided by the present invention.

[0022] Figure 2 This is a cross-sectional view of the miniature double-ended floating button connector provided by the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the upper base.

[0024] Figure 4 This is a sectional view of the upper base.

[0025] Figure 5 This is a three-dimensional structural diagram of the lower base.

[0026] Figure 6 This is a sectional view of the lower base.

[0027] Figure 7 This is a 3D structural diagram of the connecting nut.

[0028] Figure 8 A schematic diagram of the contact assembly formed by the protective cap and the button.

[0029] Explanation of reference numerals: 1-Upper base; 101-First mounting hole; 101a-Upper hole section; 101b-Lower hole section; 102-First guide post; 2-Lower base; 201-Second mounting hole; 202-Accommodation groove; 203-Second guide post; 3-Connecting nut; 3a-Threaded hole; 3b-Square head; 3c-Main body; 3d-Riveted part; 4-Protective cap; 5-Hair button contact. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0033] Please see Figures 1 to 8 This invention provides a miniature double-ended floating button connector and its assembly method for vertical interconnection between two PCBs, which is particularly suitable for space-constrained and high-reliability scenarios such as aerospace, satellite communication, and automotive electronics.

[0034] I. Overall Structure of the Connector The miniature double-ended floating fuzzy button connector mainly includes: upper base 1, lower base 2, connecting nut 3, protective cap 4, and fuzzy button contact 5.

[0035] (a) Upper base 1 The upper base 1 is injection molded from an insulating material (in this embodiment, liquid crystal polymer LCP), and is rectangular in shape with a length of approximately 10 mm, a width of approximately 2.8 mm, and a height of approximately 1.5 mm, meeting the requirements of miniaturization design. The top surface A of the upper base 1 is a plane for bonding with the first PCB board.

[0036] Two first mounting holes 101 are provided on the upper base 1 for mounting the connecting nut 3. The first mounting hole 101 is a stepped hole, including an upper hole section 101a and a lower hole section 101b. The upper hole section 101a is a square countersunk hole, which is used to accommodate the square head 3b of the connecting nut 3 and prevent the connecting nut 3 from rotating during the thread tightening process; the lower hole section 101b is a round hole, which is used to interfere with the main body 3c of the connecting nut 3.

[0037] First guide posts 102 are integrally formed at both ends of the top surface A of the upper base 1. The first guide posts 102 are used to mate with guide holes on the first PCB board to achieve rapid positioning and installation. The top end of the first guide post 102 is set as a tapered head to serve as a guide, so that the guide post can be easily inserted into the guide hole of the first PCB board.

[0038] Multiple receiving holes (not individually labeled in the figure) are provided in the upper base 1 to accommodate the upper end of the button contact 5 and the protective cap 4. The receiving hole is a stepped circular hole, which allows the protective cap 4 to slide within the receiving hole. The stepped surface of the receiving hole and the stepped surface of the protective cap 4 form a blocking limit to prevent the protective cap 4 from falling out.

[0039] (ii) Lower base 2 The lower base 2 is also injection molded from LCP material, and its shape is basically the same as that of the upper base 1, with a length of about 10mm, a width of about 2.8mm, and a height of about 1.8mm. The bottom surface B of the lower base 2 is flat and is used to attach to the second PCB board.

[0040] Two second mounting holes 201 (corresponding to the number of first mounting holes 101) are provided on the lower base 2. The second mounting holes 201 are round holes used for interference fit with the main body 3c of the connecting nut 3. The positions of the second mounting holes 201 correspond one-to-one with the first mounting holes 101 of the upper base 1, ensuring that the connecting nut 3 can pass vertically through the upper base 1 and enter the lower base 2.

[0041] Two receiving grooves 202 are provided on the bottom surface B of the lower base 2. The receiving grooves 202 penetrate the front and rear surfaces of the lower base 2 and are located at the lower end of the second mounting hole 201. The receiving grooves 202 are used to accommodate the riveted part 3d of the riveted connecting nut 3.

[0042] A second guide post 203 is integrally formed at both ends of the bottom surface B of the lower base 2. The second guide post 203 is used to cooperate with the guide hole on the second PCB board. The lower end of the second guide post 203 is also set as a tapered head to play a guiding role and facilitate insertion into the guide hole of the second PCB board.

[0043] Multiple receiving holes (not individually labeled in the figure) are also provided in the lower base 2 to accommodate the lower end of the button contact 5 and the protective cap 4. Similarly, the receiving holes of the lower base 2 are stepped circular holes, and the protective cap 4 can slide within the receiving holes. The stepped surface of the receiving hole and the stepped surface of the protective cap 4 form a blocking limit to prevent the protective cap 4 from falling out.

[0044] The receiving holes of the lower base 2 correspond one-to-one with the receiving holes of the upper base 1, ensuring that the two ends of the button contact 5 are coaxial.

[0045] (iii) 5 Wool button contact parts The button contact 5 is a cylindrical elastomer woven from beryllium copper alloy wire (or other elastic metal wire, such as palladium copper alloy wire or gold-plated stainless steel wire), which has excellent axial compressive elasticity and electrical conductivity.

[0046] The two ends of the button contact 5 are inserted into the corresponding receiving holes of the upper base 1 and the lower base 2, respectively, so as to contact the PCB pads during pressing. The protective cap 4 is in sliding fit with the receiving holes of the upper base 1 and the lower base 2, and the button contact 5 always exerts an axial thrust on the protective caps 4 at both ends, thus realizing the floating function of the protective caps 4 at both ends. That is, when the two PCB boards simultaneously press the protective caps 4 inward, the button contact 5 retracts, and the protective caps 4 at both ends move inward. Since the button contact 5 always exerts an axial thrust on the protective caps 4 at both ends, it pushes the protective caps 4 tightly against the PCB board to ensure good contact.

[0047] (iv) Protective cap 4 The protective cap 4 is made of conductive metallic material (in this embodiment, brass with gold plating) and has a thin-walled cup-shaped structure. Its inner diameter forms an elastic interference fit with the outer diameter of the button contact 5, ensuring a reliable electrical connection between the protective cap 4 and the button contact 5; its outer diameter has a clearance fit (sliding fit) with the inner diameter of the receiving holes of the upper base 1 and lower base 2. The protective cap 4 is fitted over both ends of the button contact 5, completely covering the end face and part of the side of the button. The outer circumferential surface of the protective cap 4 is stepped, used to form a blocking and limiting effect with the stepped surfaces of the receiving holes of the upper base 1 and lower base 2.

[0048] Protective cap 4 has multiple functions: Conductive Function: The protective cap 4, as part of the conductive contact, together with the button contact 5, forms a complete conductive path. When the connector is pressed against the PCB board, the end face of the protective cap 4 directly contacts the pads on the PCB board, enabling the transmission of electrical signals.

[0049] Protective function: Protects the end of the button contact 5 from mechanical damage and prevents the button threads from becoming tangled or broken.

[0050] Guiding and floating function: The sliding fit between the protective cap 4 and the receiving holes of the upper base 1 and the lower base 2 ensures the smooth axial floating of the hair button contact 5, while preventing the hair button thread from being squeezed out of the receiving hole during the floating process.

[0051] Because the protective cap 4 is made of a metallic conductive material, its contact resistance with the button contact 5 is extremely small, together forming a low-resistance, high-reliability elastic conductive contact.

[0052] (v) Connecting nut 3 The connecting nut 3 is a specially made metal part. In this embodiment, it is made of brass and plated with gold to improve conductivity and corrosion resistance. The connecting nut 3 includes a square head 3b, a main body 3c, and a riveted part 3d from top to bottom, and the whole is in the shape of a stepped shaft.

[0053] The square head 3b is a cuboid (i.e., its cross-section is square), and its external dimensions match the upper hole section 101a (square countersunk hole) of the first mounting hole 101 of the upper base 1. The height of the square head 3b is H, and the depth of the upper hole section 101a is L, satisfying L≥H. This ensures that when the connecting nut 3 is pressed into place, the square head 3b is completely recessed into the upper hole section 101a, and the top surface of the connecting nut 3 is not higher than the top surface A of the upper base 1, thereby ensuring that the top surface of the upper base 1 can be flat and fit snugly against the PCB board.

[0054] The main body 3c is cylindrical, and its outer diameter is interference-fitted with the inner diameter of the lower hole section 101b of the upper base 1 and the inner diameter of the second mounting hole 201 of the lower base 2.

[0055] The connecting nut 3 has a threaded hole 3a at its center, which is used to engage with an external screw to lock the connector to the printed circuit board.

[0056] The riveted part 3d is an arc-shaped block structure. In its initial state, it is a straight wall (unriveted state), and its outer diameter is smaller than that of the main body 3c. After the press fit is in place, the riveting tool applies radial outward pressure to the riveted part 3d, causing it to fold outward and lock into the receiving groove 202 of the lower base 2. The square head 3b and the riveting structure together achieve axial fixation of the connecting nut 3, preventing the connecting nut 3 from being pulled out by the screw or from axially loosening during use.

[0057] II. Assembly Method The assembly method of the miniature double-ended floating button connector in this embodiment includes the following steps: S1: Forming contact parts Protective caps 4 are respectively fitted onto the outer ends of the button contact 5. Since the protective caps 4 are made of metal, they are press-fitted with the button contact 5 to ensure reliable electrical contact. After fitting, the protective caps 4 and the button contact 5 form a single conductive contact assembly. Each button contact 5 corresponds to two protective caps 4 (one at each end).

[0058] S2: Insert the contact assembly and mate it with the base. The multiple contact components obtained in step S1 are sequentially inserted into the receiving holes of the lower base 2. During insertion, the lower end of the button contact component 5, together with the protective cap 4, enters the receiving hole of the lower base 2.

[0059] Then, the upper base 1 is mated to the top surface of the lower base 2. During mating, the receiving hole of the upper base 1 is aligned with the upper end of the button contact 5, and gently pressed together so that the upper end of the button contact 5, along with the protective cap 4, enters the receiving hole of the upper base 1. At the same time, the bottom surface of the upper base 1 is in contact with the top surface of the lower base 2. During the mating process, the button contact 5 is slightly compressed.

[0060] S3: Press in the connecting nut The connecting nut 3 is pressed into the corresponding mounting holes of the upper base 1 and the lower base 2 from top to bottom. Specifically, the riveted part 3d of the connecting nut 3 is facing downwards and aligned with the first mounting hole 101 of the upper base 1. A press-fitting tool is used to apply stable pressure, causing the connecting nut 3 to pass through the lower hole section 101b of the first mounting hole 101 and the second mounting hole 201 in sequence. During the pressing process, the main body 3c of the connecting nut 3 forms an interference fit with the lower hole section 101b and the second mounting hole 201, providing radial fixation.

[0061] During pressing, the square head 3b of the connecting nut 3 must be fully submerged into the upper hole section 101a of the upper base 1, so that the top surface of the connecting nut 3 is not higher than the top surface of the upper base 1 (i.e., L≥H). This ensures that the top surface of the upper base 1 is flat and can fit well with the PCB board.

[0062] S4: Riveting and fixing The riveted portion 3d of the connecting nut 3 is riveted using a riveting tool. Specifically, radial outward pressure is applied to the riveted portion 3d, causing it to deform outwards evenly and eventually lock into the receiving groove 202 of the lower base 2. The riveted portion 3d forms a flange that abuts against the bottom of the receiving groove 202. The square head 3b and the riveted portion 3d together axially fix the connecting nut 3, preventing it from moving upwards.

[0063] After riveting is completed, the connecting nut 3 is securely embedded in the upper base 1 and the lower base 2 through a triple mechanism: interference fit (radial fixation), square head 3b and square countersunk hole fit (anti-rotation fixation), and riveted part 3d and receiving groove 202 fit (axial fixation). At this point, the entire connector assembly is complete.

[0064] The overall dimensions of the assembled connector are approximately 10.2mm in length, 2.8mm in width, and 3.3mm in height (excluding guide posts), meeting the requirements for miniaturization design.

[0065] III. Installation and Use with PCB Board The first PCB board (upper board) has guide holes corresponding to the first guide post 102 and through holes corresponding to the threaded holes 3a of the connecting nut 3. The lower surface of the first PCB board has pads corresponding to the upper end of the protective cap 4. The second PCB board (lower board) has guide holes corresponding to the second guide post 203 and through holes corresponding to the threaded holes 3a of the connecting nut 3, and the upper surface has pads corresponding to the lower end of the protective cap 4.

[0066] The installation steps are as follows: Step A: Insert the first guide post 102 of the connector into the guide hole of the first PCB board, and at the same time insert the second guide post 203 into the guide hole of the second PCB board.

[0067] Step B: Pass two screws through the through holes on the first PCB board and screw them into the threaded hole 3a of the connecting nut 3. At the same time, pass two screws through the through holes on the second PCB board and screw them into the threaded hole 3a of the connecting nut 3.

[0068] Step D: Tighten the four screws at the top in sequence. During the screw tightening process, the screw heads press against the first PCB board, causing the lower surface of the first PCB board to gradually come into contact with the top surface A of the upper base 1. Similarly, the upper surface of the second PCB board gradually comes into contact with the bottom surface B of the lower base 2. This compresses the button contact 5, but the button contact 5 always exerts an axial thrust on the protective caps 4 at both ends, ensuring that the protective caps 4 at both ends are firmly against the first PCB board and the second PCB board, respectively. The current path is: first PCB board pad → upper protective cap 4 → button contact 5 → lower protective cap 4 → second PCB board pad.

[0069] Ultimately, both ends of the connector achieve a stable and reliable signal connection to the two PCBs via a solderless press-fit method. The entire installation process requires no soldering, no additional flanges, and only four screws are needed for tightening.

[0070] IV. Working Principle of Double-Ended Floating The core advantage of this invention lies in its double-ended floating structure. The protective cap 4 has a sliding fit with the receiving holes of the upper base 1 and the lower base 2. After installation, if there is a slight deviation between the actual distance between the first PCB board and the second PCB board and the theoretical design value (e.g., a change in board spacing of ±0.1 mm due to machining or assembly tolerances), this deviation will be absorbed by both ends of the button contact 5. Specifically, when the board spacing is greater than the design value, the compression of the button contact 5 decreases, but it still exerts an axial thrust on the protective cap 4; when the board spacing is less than the design value, the compression of the button contact 5 increases, and it still exerts an axial thrust on the protective cap 4. Because the two ends float independently, the button contact 5 can automatically adapt to changes in board spacing, always maintaining good contact pressure and low contact resistance. Compared with the single-ended floating structure, the tolerance of the double-ended floating structure is doubled, making it particularly suitable for scenarios where the PCB boards at both ends are manufactured by different suppliers or have significant differences in thermal expansion coefficients.

[0071] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A miniature double-ended floating button connector, characterized in that, It includes an upper base (1), a lower base (2), a connecting nut (3), a protective cap (4), and a hair button contact (5); The two ends of the button contact (5) are respectively floatingly installed in the corresponding receiving holes of the upper base (1) and the lower base (2); the protective cap (4) is respectively sleeved on the two ends of the button contact (5), and the protective cap (4) slides in cooperation with the receiving holes of the upper base (1) and the lower base (2). The upper base (1) and the lower base (2) are connected to each other and multiple connecting nuts (3) are inserted therein. The connecting nuts (3) are respectively press-fitted with the upper base (1) and the lower base (2) and riveted to fix them. The connecting nut (3) has a threaded hole (3a) at its center, which is used to engage with an external screw to lock the connector to the printed circuit board.

2. The miniature double-ended floating button connector according to claim 1, characterized in that, A plurality of first mounting holes (101) are provided on the upper base (1). The first mounting hole (101) is a stepped hole, which includes an upper hole section (101a) and a lower hole section (101b). The upper hole section (101a) is a square countersunk hole, and the lower hole section (101b) is a round hole. A plurality of second mounting holes (201) are provided on the lower base (2), and the second mounting holes (201) are round holes; a receiving groove (202) is provided on the lower end face of the lower base (2). The connecting nut (3) includes, from top to bottom, a square head (3b), a main body (3c), and a riveting part (3d); the main body (3c) is interference-fitted with the lower hole section (101b) and the second mounting hole (201), and the square head (3b) is embedded in the upper hole section (101a); the riveting part (3d) is stuck in the receiving groove (202) after being riveted.

3. The miniature double-ended floating button connector according to claim 2, characterized in that, The height of the square head (3b) is H, and the depth of the upper hole section (101a) is L; satisfying: L≥H.

4. The miniature double-ended floating button connector according to claim 1, characterized in that, Two first guide posts (102) are integrally formed on the top surface of the upper base (1) for engaging with guide holes on the printed circuit board.

5. The miniature double-ended floating button connector according to claim 4, characterized in that, The top of the first guide post (102) is set as a tapered head.

6. The miniature double-ended floating button connector according to claim 1, characterized in that, Two second guide posts (203) are integrally formed on the bottom surface of the lower base (2) for engaging with guide holes on the printed circuit board.

7. The miniature double-ended floating button connector according to claim 6, characterized in that, The lower end of the second guide post (203) is configured as a tapered head.

8. The miniature double-ended floating button connector according to claim 1, characterized in that, The upper base (1) and the lower base (2) are injection molded from insulating material.

9. An assembly method for a miniature double-ended floating button connector according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Place the protective caps (4) on the outside of both ends of the button contact (5) to form a contact assembly; S2. Insert the multiple contact parts obtained in step S1 into the receiving holes of the lower base (2), and then connect the upper base (1) to the top surface of the lower base (2); S3. Press the connecting nut (3) into the corresponding mounting holes of the upper base (1) and lower base (2) from top to bottom to form an interference fit; S4: The connecting nut (3) is riveted by a riveting tool to fix the connecting nut (3) axially in the upper base (1) and lower base (2).

10. The assembly method according to claim 9, characterized in that, In step S3, when pressing in the connecting nut (3), the square head (3b) of the connecting nut (3) is required to be completely sunk into the upper hole section (101a) of the upper base (1), so that the top surface of the connecting nut (3) is not higher than the top surface of the upper base (1).

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