Single-end floating sealing fuzz button connector and packaging method thereof

Abstract

The invention relates to the technical field of electronic connectors, in particular to a single-ended floating sealing fuzz button connector and a packaging method thereof. The connector comprises an outer contact piece, a base and a plurality of central contact pieces. A partition plate is integrally formed in the outer contact piece and divides a center hole of the outer contact piece into an upper hole body and a lower hole body. A plurality of through holes are formed in the partition plate; a sealing gasket is mounted in the lower hole body; the upper end face of the sealing gasket abuts against the lower surface of the partition plate. The central contact element is inserted in the through hole, and a glass body is sintered between the inner hole surface of the through hole and the outer cylindrical surface of the central contact element; the base is installed in the lower hole body of the outer contact piece, and the top surface of the base abuts against the lower surface of the sealing gasket. A plurality of stepped holes are formed in the base, and fuzz buttons and contact caps are sequentially mounted in each stepped hole from top to bottom; the lower end of the central contact piece penetrates through the sealing gasket and then extends into the stepped hole, and the upper end and the lower end of the fuzz button abut against the central contact piece and the contact cap respectively.

Description

Technical Field

[0001] The invention relates to the technical field of electronic connectors, and in particular to a single-end floating sealed wool button connector and a packaging method thereof. Background Art

[0002] Glass sintered airtight connectors have the advantages of small size, high temperature resistance, long service life, and high sealing performance. They have been widely used in satellites, spacecraft, space stations, deep space probes and other equipment.

[0003] Fuzz Button is a cylindrical part made of high-elastic beryllium bronze wire randomly and densely wound. It can achieve 15% to 30% elastic compression in the axial direction, and the compression amount is usually selected as 20% of the total length. As a contact, the fuzz button is suitable for applications such as high density, long life, high reliability, high-frequency and high-speed transmission, and low contact force. The principle is the same as that of ordinary spring contacts, which is elastic contact, but its special structure does not form the induction coil effect of the spring, reduces the signal path length and skin effect, increases the integrity and strength of the structure, and forms multiple points of parallel redundant contact inside and outside. It has the advantages of small mutual inductance, small capacitance, and low contact resistance. Therefore, the fuzz button is suitable for high-frequency and high-speed interconnection between PCBs, meeting the stringent requirements of aviation, aerospace, electronics, weapons and other applications.

[0004] The button connector is a new type of connector with high frequency of use, small size, large floating amount, impact and vibration resistance. It is flexible and diverse in use and is especially suitable for high-density, board-to-board, and modular applications.

[0005] In the prior art, for example, the patent application with publication number CN107732518A discloses a strongly sealed fur button RF coaxial connector, which uses a structure in which a glass insulator is encapsulated between a central contact and an outer contact, and the fur button and a contact cap are arranged in an engineering plastic insulator and assembled with the outer contact. However, the connector has the following problems:

[0006] (1) Since the contact cap, the fur button and the engineering plastic insulator are all clearance-fitted, when the connector is used in a humid environment, water vapor will enter the interior of the connector through the gaps between the engineering plastic insulator and the contact cap and the fur button. When there are multiple center contacts inside the connector, it is easy to cause a short circuit between the center contacts.

[0007] (2) When the base assembly formed by the engineering plastic insulator, the wool button, and the contact cap is pressed into the outer contact, the upper end of the engineering plastic insulator tends to rest against the tail end stage of the center contact, thereby affecting the glass insulator and causing air leakage in the sealing area of ​​the glass insulator. Summary of the invention

[0008] The main purpose of the present invention is to provide a single-ended floating sealed button connector and a packaging method thereof, aiming to solve the above-mentioned technical problems.

[0009] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a single-end floating sealed button connector, comprising an outer contact, a base and a plurality of center contacts; a partition is integrally formed inside the outer contact, and the partition divides the center hole of the outer contact into an upper hole body and a lower hole body; a plurality of through holes are arranged on the partition; a sealing gasket is installed in the lower hole body; and the upper end surface of the sealing gasket abuts against the lower surface of the partition; the center contact is inserted into the through hole, and a glass body is sintered between the inner hole surface of the through hole and the outer cylindrical surface of the center contact; the base is installed in the lower hole body of the outer contact, and the top surface of the base is close to the lower surface of the sealing gasket, so that the sealing gasket is in an axial compression state; a plurality of stepped holes are arranged on the base, and a button and a contact cap are installed in each stepped hole in sequence from top to bottom; the lower end of the center contact passes through the sealing gasket and extends into the stepped hole, the button is in an axial compression state, and the upper and lower ends of the button abut against the center contact and the contact cap respectively.

[0010] Preferably, the compression amount of the sealing gasket is 20%.

[0011] Preferably, an annular boss is provided at a middle position of the outer cylindrical surface of the base, and the annular boss is interference fit with the lower hole body of the external contact piece.

[0012] Preferably, the height of the annular boss is E, and the height of the base is D, and the two satisfy: E≥D / 3.

[0013] Preferably, the stepped hole includes a first stepped hole, a second stepped hole and a third stepped hole with gradually decreasing diameters from top to bottom; the lower end of the center contact piece extends into the first stepped hole, and the first stepped hole and the lower end of the center contact piece are clearance-matched; a chamfer is provided on the opening of the first stepped hole.

[0014] Preferably, the contact cap includes a columnar portion and an annular limit platform integrally formed on the outer peripheral surface of the top of the columnar portion; the columnar portion is slidably inserted in the third step hole; the annular limit platform is arranged in the second step hole; the step surface between the third step hole and the second step hole forms an axial limit on the lower end surface of the annular limit platform; the outer peripheral surface of the annular limit platform is gap-matched with the inner hole surface of the second step hole; the wool button is arranged in the second step hole, and the upper end of the wool button extends into the first step hole, and the inner hole surface of the second step hole is gap-matched with the wool button.

[0015] Preferably, the lower end of the column part is in the shape of a hemispherical head.

[0016] Preferably, a recessed hole is provided on the top surface of the sealing gasket. When the sealing gasket is in an axial compression state after assembly, the recessed hole is spaced apart from the glass body to form a recessed hole. The distance between the bottom wall of the recessed hole and the lower end of the glass body is C, and C≥0.1mm.

[0017] On the other hand, the present invention also provides a packaging method for the above-mentioned single-ended floating sealed button connector, comprising the following steps:

[0018] S1. Making a shell assembly: inserting the center contact into the through hole of the partition, sintering a glass body between the inner hole surface of the through hole and the outer cylindrical surface of the center contact, installing a sealing gasket on the lower hole body of the outer contact, so that the upper end surface of the sealing gasket abuts against the lower surface of the partition, and the lower end of the center contact passes through the sealing gasket, thereby obtaining a shell assembly;

[0019] S2. Making a base assembly: inserting the contact cap and the wool button into the stepped hole of the base in sequence to obtain a base assembly;

[0020] S3. Press the base assembly obtained in step S2 into the lower hole body of the external contact piece, and the top surface of the base is close to the lower surface of the sealing gasket so that the sealing gasket is in an axial compression state; an interference fit is formed between the base and the lower hole body of the external contact piece, and the lower end of the center contact piece extends into the stepped hole and axially presses the hair button so that the hair button is in a compressed state.

[0021] Preferably, in step S3, when the base assembly is pressed into the lower hole of the external contact, it is ensured that the lower end surface of the base is flush with the lower end surface of the external contact and satisfies the following relationship:

[0022] (D+BA) / B·100%=20%;

[0023] Wherein: A is the height of the lower hole of the external contact piece; B is the height of the sealing gasket in the natural state; D is the height of the base.

[0024] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0025] (1) In the present invention, a sealing gasket is installed in the lower hole of the outer contact, and the upper end surface of the sealing gasket is against the lower surface of the partition, and the top surface of the base is close to the lower surface of the sealing gasket, so that the sealing gasket is in an axial compression state, so that the top surface of the sealing gasket forms a surface contact seal with the lower surface of the partition, and at the same time, the lower surface of the sealing gasket and the top surface of the base also form a surface contact seal. Even if water vapor enters the interior of the connector along the gap between the base and the contact cap and the fur button, due to the presence of surface contact seals on both the upper and lower surfaces of the sealing gasket, short circuits between the center contacts can be effectively prevented. Therefore, the single-ended floating sealing fur button connector provided by the present invention has a good moisture-proof function.

[0026] (2) In the present invention, the lower end of the center contact piece extends into the first step hole of the base. Since the first step hole forms a giving way for the lower end of the center contact piece, when the base is assembled, it is possible to effectively avoid contact between the base and the center contact piece, thereby effectively avoiding air leakage in the glass sealing area.

[0027] (3) In the present invention, a clearance countersunk hole is provided on the top surface of the sealing gasket. After the sealing gasket is assembled, the clearance countersunk hole is spaced apart from the glass body to form a clearance. When the base is assembled and the sealing gasket is axially compressed, the clearance countersunk hole can avoid damage to the glass body caused by axial compression of the sealing gasket, effectively protecting the glass body, thereby ensuring that the sealing performance of the glass body sealing part is not affected by the assembly of the base assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the single-end floating sealed button connector provided by the present invention;

[0030] Figure 2 It is a structural schematic diagram of the base assembly in the present invention;

[0031] Figure 3 It is a structural schematic diagram of the housing assembly in the present invention;

[0032] Figure 4 is a schematic structural diagram of an external contact member in the present invention;

[0033] Figure 5 is a schematic diagram of the structure of the sealing gasket in the present invention;

[0034] Figure 6 is a schematic structural diagram of a center contact in the present invention;

[0035] Figure 7 It is a structural schematic diagram of the base in the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the contact cap in the present invention.

[0037] Explanation of the accompanying drawings: 1. External contact piece; 1a. Partition plate; 1b. Upper hole body; 1c. Lower hole body; 1d. Through hole; 2. Base; 2a. Step hole; 2b. First step hole; 2c. Second step hole; 2d. Third step hole; 2e. Annular boss; 2f. Chamfer; 3. Center contact piece; 4. Glass body; 5. Fur button; 6. Contact cap; 6a. Column part; 6b. Annular limit platform; 7. Sealing gasket; 7a. Countersunk hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] As shown in the accompanying drawings, on the one hand, this embodiment provides a single-end floating sealed button connector, including an outer contact 1, a base 2 and a plurality of center contacts 3; a partition 1a is integrally formed inside the outer contact 1, and the partition 1a divides the center hole of the outer contact 1 into an upper hole body 1b and a lower hole body 1c; a plurality of through holes 1d are arranged on the partition 1a; a sealing gasket 7 is installed in the lower hole body 1c; and the upper end surface of the sealing gasket 7 abuts against the lower surface of the partition 1a; the center contact 3 is inserted into the through hole 1d, and the inner hole surface of the through hole 1d is in contact with the center contact 3. A glass body 4 is sintered between the outer cylindrical surfaces of the member 3; the base 2 is installed in the lower hole body 1c of the external contact member 1, and the top surface of the base 2 is close to the lower surface of the sealing gasket 7, so that the sealing gasket 7 is in an axial compression state; a plurality of stepped holes 2a are arranged on the base 2, and a wool button 5 and a contact cap 6 are installed in each stepped hole 2a from top to bottom; the lower end of the center contact member 3 passes through the sealing gasket 7 and extends into the stepped hole 2a, the wool button 5 is in an axial compression state, and the upper and lower ends of the wool button 5 are respectively against the center contact member 3 and the contact cap 6.

[0042] By adopting the above structure, since the sealing gasket 7 is in an axially compressed state, the top surface of the sealing gasket 7 forms a surface contact seal with the lower surface of the partition 1a, and the lower surface of the sealing gasket 7 and the top surface of the base 2 also form a surface contact seal. Even if water vapor enters the interior of the connector along the gap between the base and the contact cap and the wool button, since there are surface contact seals on the upper and lower surfaces of the sealing gasket 7, a short circuit between the center contacts 3 can be effectively prevented.

[0043] In this embodiment, the compression amount of the sealing gasket 7 is 20%.

[0044] Combination Figure 7 As shown, in order to reduce the interference fit length between the outer periphery of the base 2 and the lower hole 1c of the external contact 1 and reduce the difficulty of assembly, an annular boss 2e is provided at the middle position of the outer cylindrical surface of the base 2, and the outer periphery of the annular boss 2e is used to interfere with the lower hole 1c of the external contact 1. The interference fit method is used to avoid looseness between the base 2 and the external contact 1. Furthermore, in order to ensure the reliability of the connection between the interference fit part of the base 2 and the external contact 1 and prevent the base 2 from falling off, the matching length of the two is required to meet the following requirements: the height of the annular boss 2e is E, the height of the base 2 is D, and the two satisfy: E≥D / 3.

[0045] Combination Figure 1 and Figure 7As shown, the stepped hole 2a includes a first stepped hole 2b, a second stepped hole 2c and a third stepped hole 2d with gradually decreasing diameters from top to bottom; the lower end of the center contact 3 extends into the first stepped hole 2b, and the first stepped hole 2b and the lower end of the center contact 3 are clearance-matched; a chamfer 2f is provided on the opening of the first stepped hole 2b. By utilizing the first stepped hole 2b to form a giving way for the lower end of the center contact 3, when assembling the base 2, the base 2 and the center contact 3 can be effectively prevented from touching, thereby effectively preventing air leakage in the sealing area of ​​the glass body 4. By providing the chamfer 2f, a guiding effect is played on the lower end of the center contact 7, which is used to guide the lower end of the center contact 7 to be inserted into the first stepped hole 2b.

[0046] Combination Figure 2 , Figure 7 and Figure 8 As shown, the contact cap 6 includes a column part 6a and an annular stopper 6b integrally formed on the outer peripheral surface of the top of the column part 6a; the column part 6a is slidably inserted in the third step hole 2d; the annular stopper 6b is arranged in the second step hole 2c; the step surface between the third step hole 2d and the second step hole 2c forms an axial stopper on the lower end surface of the annular stopper 6b; the outer peripheral surface of the annular stopper 6b is clearance-matched with the inner hole surface of the second step hole 2c; the fur button 5 is arranged in the second step hole 2c, and the upper end of the fur button 5 extends into the first step hole 2b, and the inner hole surface of the second step hole 2c is clearance-matched with the fur button 5. Further, the lower end of the column part 6a is in the shape of a hemispherical head. The contact cap 6 has a floating function, which can overcome the elastic force of the fur button 5 and move upward, and at the same time move downward under the elastic force of the fur button 5. When in use, the contact cap 6 plays a contact role and theoretically makes point contact with the PCB board, thereby achieving a larger radial floating tolerance.

[0047] In this embodiment, the upper half of the center contact 7 is a tubular body, and the lower half is a solid cylinder. The solid cylinder of the center contact 1 is installed on the through hole 1d of the partition 1a. The tubular body on the upper part of the center contact 7 can be connected to a pin connector. Since the contact cap 6 is a floating structure, it can achieve solder-free interconnection with the PCB board.

[0048] In this embodiment, in order to prevent the sealing gasket 7 from causing damage to the glass body 4 during axial compression during assembly, a clearance countersunk hole 7a is provided on the top surface of the sealing gasket 7. When the sealing gasket 7a is in an axial compression state after assembly, the clearance countersunk hole 7a and the glass body 4 are spaced apart to form a clearance. The distance from the bottom wall of the clearance countersunk hole 7a to the lower end of the glass body 4 is C, satisfying C≥0.1mm.

[0049] On the other hand, this embodiment also provides a packaging method for the above-mentioned single-ended floating sealed button connector, comprising the following steps:

[0050] S1. Making a shell assembly: insert the center contact 3 into the through hole 1d of the partition 1a, and sinter the glass body 4 between the inner hole surface of the through hole 1d and the outer cylindrical surface of the center contact 3, and install the sealing gasket 7 on the lower hole body 1c of the outer contact 1, so that the upper end surface of the sealing gasket 7 abuts against the lower surface of the partition 1a, and the lower end of the center contact 3 passes through the sealing gasket 7, thereby obtaining a shell assembly;

[0051] S2, making a base assembly: sequentially inserting the contact cap 6 and the wool button 5 into the stepped hole 2a of the base 2 to obtain a base assembly;

[0052] S3. Press the base assembly obtained in step S2 into the lower hole 1c of the external contact piece 1, and make the top surface of the base 2 close to the lower surface of the sealing gasket 7, so that the sealing gasket 7 is in an axial compression state; an interference fit is formed between the base 2 and the lower hole 1c of the external contact piece 1; the lower end of the center contact piece 3 extends into the stepped hole 2a and axially presses the wool button 5, so that the wool button 5 is in a compressed state.

[0053] In step S3, in order to ensure the compression amount of the sealing gasket 7, when the base assembly is pressed into the lower hole 1c of the external contact 1, it is ensured that the lower end surface of the base 2 is flush with the lower end surface of the external contact 1, and the following relationship is satisfied:

[0054] (D+BA) / B·100%=20%.

[0055] Wherein: A is the height of the lower hole 1c of the external contact member 1;

[0056] B is the height of the sealing gasket 7 in the natural state;

[0057] D is the height of the base 2.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A single-ended floating sealed button connector, characterized in that: It comprises an outer contact piece (1), a base (2) and a plurality of center contacts (3); A partition (1a) is integrally formed inside the external contact member (1), and the partition (1a) divides the central hole of the external contact member (1) into an upper hole body (1b) and a lower hole body (1c); a plurality of through holes (1d) are provided on the partition (1a); a sealing gasket (7) is installed in the lower hole body (1c); and the upper end surface of the sealing gasket (7) abuts against the lower surface of the partition (1a); The central contact piece (3) is inserted into the through hole (1d), and a glass body (4) is sintered between the inner hole surface of the through hole (1d) and the outer cylindrical surface of the central contact piece (3); The base (2) is installed in the lower hole (1c) of the external contact member (1), and the top surface of the base (2) is closely abutted against the lower surface of the sealing gasket (7), so that the sealing gasket (7) is in an axially compressed state; A plurality of stepped holes (2a) are provided on the base (2), and a wool button (5) and a contact cap (6) are installed in each stepped hole (2a) from top to bottom in sequence; the lower end of the central contact piece (3) passes through a sealing gasket (7) and extends into the stepped hole (2a), the wool button (5) is in an axially compressed state, and the upper and lower ends of the wool button (5) respectively abut against the central contact piece (3) and the contact cap (6).

2. A single-end floating seal button connector as claimed in claim 1, characterized in that: The compression amount of the sealing gasket (7) is 20%.

3. A single-ended floating seal button connector as claimed in claim 1, characterized in that: An annular boss (2e) is provided at the middle position of the outer cylindrical surface of the base (2), and the annular boss (2e) is interference-fitted with the lower hole body (1c) of the external contact piece (1).

4. A single-end floating seal button connector as claimed in claim 3, characterized in that: The height of the annular boss (2e) is E, and the height of the base (2) is D, and the two satisfy: E≥D / 3.

5. A single-end floating seal button connector as claimed in claim 1, characterized in that: The stepped hole (2a) comprises, from top to bottom, a first stepped hole (2b), a second stepped hole (2c) and a third stepped hole (2d) with gradually decreasing diameters; the lower end of the center contact piece (3) extends into the first stepped hole (2b), and the first stepped hole (2b) is clearance-matched with the lower end of the center contact piece (3); a chamfered angle (2f) is provided on the opening of the first stepped hole (2b).

6. A single-end floating seal button connector as claimed in claim 5, characterized in that: The contact cap (6) comprises a columnar portion (6a) and an annular limit platform (6b) integrally formed on the outer peripheral surface of the top of the columnar portion (6a); the columnar portion (6a) is slidably inserted in the third step hole (2d); the annular limit platform (6b) is arranged in the second step hole (2c); the step surface between the third step hole (2d) and the second step hole (2c) forms an axial limit on the lower end surface of the annular limit platform (6b); the outer peripheral surface of the annular limit platform (6b) is clearance-matched with the inner hole surface of the second step hole (2c); the wool button (5) is arranged in the second step hole (2c), and the upper end of the wool button (5) extends into the first step hole (2b), and the inner hole surface of the second step hole (2c) is clearance-matched with the wool button (5).

7. A single-end floating seal button connector as claimed in claim 6, characterized in that: The lower end of the column part (6a) is in the shape of a hemispherical head.

8. A single-end floating seal button connector as claimed in claim 1, characterized in that: A recessed hole (7a) is provided on the top surface of the sealing gasket (7). When the sealing gasket (7a) is in an axially compressed state after being assembled, the recessed hole (7a) and the glass body (4) are spaced apart to form a recessed hole. The distance between the bottom wall of the recessed hole (7a) and the lower end of the glass body (4) is C, and C≥0.1 mm.

9. A packaging method for a single-end floating sealed button connector according to any one of claims 1 to 8, characterized in that: The steps include: S1. Manufacturing a shell assembly: inserting the center contact piece (3) into the through hole (1d) of the partition (1a), and sintering the glass body (4) between the inner hole surface of the through hole (1d) and the outer cylindrical surface of the center contact piece (3), installing the sealing gasket (7) on the lower hole body (1c) of the outer contact piece (1), so that the upper end surface of the sealing gasket (7) abuts against the lower surface of the partition (1a), and the lower end of the center contact piece (3) passes through the sealing gasket (7), thereby obtaining a shell assembly; S2, making a base assembly: sequentially inserting the contact cap (6) and the wool button (5) into the stepped hole (2a) of the base (2) to obtain a base assembly; S3. Press the base assembly obtained in step S2 into the lower hole (1c) of the outer contact piece (1), and the top surface of the base (2) is pressed against the lower surface of the sealing gasket (7), so that the sealing gasket (7) is in an axial compression state; an interference fit is formed between the base (2) and the lower hole (1c) of the outer contact piece (1); the lower end of the center contact piece (3) extends into the stepped hole (2a) and axially presses the wool button (5), so that the wool button (5) is in a compressed state.

10. A packaging method for a single-ended floating sealed button connector as claimed in claim 9, characterized in that: In step S3, when the base assembly is pressed into the lower hole (1c) of the external contact (1), it is ensured that the lower end surface of the base (2) is flush with the lower end surface of the external contact (1) and satisfies the following relationship: (D+BA) / B·100%=20%; Wherein: A is the height of the lower hole body (1c) of the external contact member (1); B is the height of the sealing gasket (7) in its natural state; D is the height of the base (2).

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