An optical aperture connector

Abstract

The utility model discloses a kind of light hole connectors, it is related to high-frequency connector technical field, including outer conductor, insulating medium and inner conductor, the outer conductor top is equipped with bowl mouth introduction type interface, the inner wall of bowl mouth introduction type interface has the guide chamfer of 30 °-45 °;Annular boss is equipped in the middle part of outer conductor inner wall;The insulating medium is filled between outer conductor and inner conductor by high-temperature sintering, and the lower surface of insulating medium and annular boss upper surface are closely combined;The inner conductor includes coaxially arranged upper portion step column and lower cylinder, and the diameter of upper portion step column is 0.2mm-0.3mm larger than lower cylinder;The outer conductor bottom is equipped with four round pins, and stress release groove is equipped in pin root portion. The design comprehensively solves the key technical problems such as insertion precision, interface reliability and stress distribution, and greatly prolongs the service life of connector.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency connector technology. Background Technology

[0002] An optical connector is a key component used for optical signal transmission. Its basic structure consists of three parts: an outer conductor, an insulating medium, and an inner conductor. The outer conductor provides electromagnetic shielding and mechanical support, the insulating medium achieves electrical isolation between the inner and outer conductors, and the inner conductor undertakes the high-frequency transmission of optical or electrical signals.

[0003] However, traditional optical connectors have significant drawbacks in practical applications: First, the lack of guiding design in the mating structure easily leads to mating misalignment, resulting in poor contact or signal loss. Second, the sintering interface experiences stress concentration due to mismatched coefficients of thermal expansion, which can easily cause microcracks after long-term use, affecting structural stability. Third, the pin layout does not consider thermodynamic distribution, and localized stress concentration during soldering may lead to fatigue fracture of the solder joints. Fourth, the interface between the inner conductor and the insulating medium suffers from insufficient mechanical strength due to poor material compatibility or inadequate processing, making it prone to loosening or detachment during vibration or insertion / removal. These problems severely restrict the reliability and service life of the connectors. Utility Model Content

[0004] The purpose of this utility model is to provide an optical hole connector in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An optical aperture connector includes an outer conductor, an insulating medium, and an inner conductor. The outer conductor has pins at its bottom and stress relief grooves at the base of the pins.

[0007] One end of the outer conductor is provided with a bowl-shaped inlet interface, which has a cylindrical section and a guide chamfer section. The chamfer angle of the outer wall of the guide chamfer section is different from that of the inner wall.

[0008] The inner wall of the outer conductor is provided with an annular protrusion at one end away from the bowl-shaped inlet interface.

[0009] The insulating medium is filled between the outer conductor and the inner conductor by high-temperature sintering, and the insulating medium is in close contact with the adjacent surface of the annular boss.

[0010] The inner conductor includes an upper stepped column and a lower cylinder coaxially connected, wherein the diameter of the upper stepped column is 0.2mm-0.3mm larger than that of the lower cylinder.

[0011] Furthermore, the pins are provided in four shapes, each being a circular column.

[0012] Furthermore, the insulating medium is annular, with one end of the insulating medium tightly connected to one end of the upper stepped column, and the other end of the insulating medium close to the bowl-shaped inlet interface.

[0013] Furthermore, a contact section is connected between the bowl-shaped inlet interface and the annular boss. One end of the contact section is coaxially connected to the annular boss, and the other end of the contact section is coaxially connected to the bowl-shaped inlet interface. The inner wall of the contact section is tightly connected to the outer wall of the insulating medium and has the same length.

[0014] Furthermore, the inner diameter of the contact segment is smaller than that of either end of the bowl-shaped inlet interface, the inner diameter of the contact segment is larger than that of the annular boss, and the inner diameter of the contact segment is smaller than that of the annular boss.

[0015] Furthermore, the outer conductor has an annular groove at the annular boss.

[0016] Furthermore, the cylindrical section and the guide chamfer section of the bowl-shaped inlet interface have a guide chamfer of 30°-45°.

[0017] Furthermore, the inner diameter of the cylindrical section of the bowl-shaped inlet interface is 3.75mm-3.85mm, and the depth of the cylindrical section is 2.4mm-2.6mm;

[0018] The annular boss has an annular width of 0.25mm-0.35mm and an annular boss thickness of 0.25mm-0.35mm.

[0019] Furthermore, the diameter of the circular pin is 0.45mm-0.55mm.

[0020] Furthermore, the four pins are centrally symmetrically distributed with an adjacent spacing of 2.1mm-2.2mm, the stress relief groove has a width of 1mm and a depth of 0.1mm.

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

[0022] 1. This connector employs an outer conductor, insulating medium, and inner conductor structure. The outer conductor features a cup-shaped inlet interface with a 30°-45° guide chamfer at the top, effectively preventing insertion misalignment and reducing insertion loss. An annular boss is added to the middle section of its inner wall, interlocking with the high-temperature sintered insulating medium to enhance interface bonding strength. The inner conductor uses a differential diameter design between the upper stepped post and the lower cylindrical post, strengthening the bonding force with the insulating medium. Four circular pins with diameters of 0.45-0.55mm at the bottom are centrally symmetrically distributed, working in conjunction with a stress-relieving groove at the root to significantly reduce welding stress concentration and enhance the inner conductor's contact capability and signal transmission capability. The size design of the annular boss and the optimized depth-to-diameter ratio of the cup-shaped interface synergistically improve structural stability. This design comprehensively solves key technical issues such as insertion accuracy, interface reliability, and stress distribution, significantly extending the connector's service life. Attached Figure Description

[0023] Figure 1 This is a first three-dimensional structural diagram of the product in this utility model;

[0024] Figure 2 This is a side view of this application.

[0025] In the picture:

[0026] 1. Outer conductor; 2. Insulating medium; 3. Inner conductor; 4. Bowl-shaped inlet interface; 5. Lower cylinder; 6. Annular boss; 7. Pin; 8. Upper stepped post; 9. Stress relief groove; 10. Contact section; 11. Annular groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1 and Figure 2As shown, this embodiment provides an optical hole connector, including an outer conductor 1, an insulating medium 2 and an inner conductor 3. The bottom of the outer conductor 1 is provided with a pin 7, and the root of the pin 7 is provided with a stress relief groove 9.

[0031] One end of the outer conductor 1 is provided with a bowl-shaped inlet interface 4. The bowl-shaped inlet interface 4 is provided with a cylindrical section and a guide chamfer section. The chamfer angle of the outer wall of the guide chamfer section is different from that of the inner wall. The cylindrical section is located at the outer edge of the opening of the bowl-shaped inlet interface 4. The inclination angle of the inner wall of the guide chamfer section is greater than that of the outer wall of the guide chamfer section, forming a relatively stable guiding slope, while ensuring the strength of the opening of the bowl-shaped inlet interface 4 and facilitating insertion and removal.

[0032] An annular protrusion 6 is provided on the inner wall of the outer conductor 1, away from the bowl-shaped inlet interface 4, to facilitate the reduction of interface stress.

[0033] The insulating medium 2 is filled between the outer conductor 1 and the inner conductor 3 by high-temperature sintering, and the insulating medium 2 is in close contact with the adjacent surface of the annular boss 6.

[0034] The inner conductor 3 includes an upper stepped post 8 and a lower cylinder 5 coaxially connected. The diameter of the upper stepped post 8 is 0.2mm-0.3mm larger than that of the lower cylinder 5. This arrangement facilitates the lower cylinder 5 to be embedded into the inner cavity of the outer conductor 1 and fixed by sintering with the insulating medium 2. At the same time, the upper stepped post 8 is larger than the lower cylinder 5, which facilitates the setting of the position.

[0035] Furthermore, there are four pins 7, each pin 7 being cylindrical in shape.

[0036] Furthermore, the insulating medium 2 is annular, with one end of the insulating medium 2 tightly connected to one end of the upper stepped column 8, and the other end of the insulating medium 2 close to the bowl-shaped inlet interface 4.

[0037] Furthermore, a contact section 10 is provided between the bowl-shaped inlet interface 4 and the annular boss 6. The contact section 10 connects the bowl-shaped inlet interface 4 and the annular boss 6, and also seals the internal insulating medium 2. One end of the contact section 10 is coaxially connected to the annular boss 6, and the other end is coaxially connected to the bowl-shaped inlet interface 4. The inner wall of the contact section 10 is tightly connected to the outer wall of the insulating medium 2 and has the same length. The contact section 10 is located on the inner wall of the outer conductor 1. The contact section 10 facilitates the expansion of the contact area between the outer conductor 1 and the insulating medium 2, making it easier to accommodate and support the insulating medium 2, and providing a larger stress-bearing support area for the insulating medium 2.

[0038] Furthermore, the inner diameter of the contact section 10 is smaller than that of either end of the bowl-shaped inlet interface 4, the inner diameter of the contact section 10 is larger than that of the annular boss 6, and the inner diameter of the contact section 10 is smaller than that of the annular boss 6. The contact section 10 and the annular boss 6 partially form a stable sintering cavity, which facilitates the sintering of the insulating medium 2.

[0039] Furthermore, the outer conductor 1 has an annular groove 11 at the annular boss 6.

[0040] Furthermore, the cylindrical section and the guide chamfer section of the bowl-shaped inlet interface have a guide chamfer of 30°-45°;

[0041] Furthermore, the inner diameter of the cylindrical section of the bowl-shaped inlet interface is 3.75mm-3.85mm, and the depth of the cylindrical section is 2.4mm-2.6mm;

[0042] The annular boss 6 has a width of 0.25mm-0.35mm and a thickness of 0.25mm-0.35mm.

[0043] Furthermore, the diameter of pin 7 is 0.45mm-0.55mm.

[0044] Furthermore, the four pins 7 are centrally symmetrically distributed with an adjacent spacing of 2.1mm-2.2mm, the stress relief groove 9 has a width of 1mm and a depth of 0.1mm.

[0045] Reference Figure 1 and Figure 2 The chamfer angle α of the bowl-shaped inlet interface 4 is 40°, and the inner diameter is 3.78±0.1mm;

[0046] The cross-sectional view shows that the distance from the top of the annular boss 6 is 0.3 ± 0.03 mm;

[0047] The pin pitch for display pin 7 is 2.15 ± 0.1 mm.

[0048] The step diameter difference Δd of the inner conductor 3 is 0.25 mm.

[0049] This solution creatively combines mechanical structure design with material sintering technology:

[0050] 1. The angle range of the bowl-shaped inlet interface was determined through multiple insertion and removal tests. Exceeding this range will result in a decrease in the guiding or locking function.

[0051] 2. The dimensions of the annular boss 6 have been optimized through finite element analysis, which can reduce interface stress;

[0052] 3. The specific pin pitch design conforms to the standard PCB pad size, avoiding solder bridging;

[0053] Through the coordinated design of structural and process parameters, the product's insertion and removal life has been increased from the conventional 500 cycles to over 1500 cycles, representing a significant technological advancement.

[0054] Implementation Principle: This connector employs an outer conductor 1, an insulating medium 2, and an inner conductor 3. The outer conductor 1 features a cup-shaped inlet interface 4 with a 30°-45° guide chamfer at its top, effectively preventing insertion misalignment and reducing insertion loss. An annular boss 6 is added to the middle section of its inner wall, interlocking with the high-temperature sintered insulating medium 2 to enhance interface bonding strength. The inner conductor 3 uses a differential diameter design between its upper stepped post 8 and lower cylindrical post 5, strengthening its bonding with the insulating medium 2. Four pins 7 with diameters of 0.45-0.55mm at the bottom are centrally symmetrically distributed, working in conjunction with a stress-relieving groove 9 at the root to significantly reduce welding stress concentration and enhance the contact capability and signal transmission capability of the inner conductor 3. The size design of the annular boss 6 and the optimized depth-to-diameter ratio of the cup-shaped interface synergistically improve structural stability. This design comprehensively solves key technical problems such as insertion accuracy, interface reliability, and stress distribution, significantly extending the connector's service life.

[0055] It should be noted that the connection relationships of components not specifically mentioned in this application are all assumed to be based on existing technology. Since they do not involve the inventive point and are commonly used in existing technology, the structural connection relationships are not described in detail.

Claims

1. A fiber optic connector, comprising an outer conductor (1), an insulating medium (2), and an inner conductor (3), characterized in that: The outer conductor (1) has a pin (7) at its bottom, and a stress relief groove (9) is provided at the root of the pin (7); The outer conductor (1) has a bowl-shaped inlet interface (4) at one end. The bowl-shaped inlet interface (4) has a cylindrical section and a guide chamfer section. The chamfer angle of the outer wall of the guide chamfer section is different from the chamfer angle of the inner wall. The inner wall of the outer conductor (1) is provided with an annular boss (6) at one end away from the bowl-shaped inlet interface (4); The insulating medium (2) is filled between the outer conductor (1) and the inner conductor (3) by high-temperature sintering, and the insulating medium (2) is in close contact with the adjacent surfaces of the annular boss (6); The inner conductor (3) includes an upper stepped column (8) and a lower cylinder (5) coaxially connected, wherein the diameter of the upper stepped column (8) is 0.2 mm to 0.3 mm larger than that of the lower cylinder (5).

2. The optical aperture connector according to claim 1, characterized in that: The pin (7) is provided in four parts, and each pin (7) is cylindrical.

3. The optical aperture connector according to claim 1, characterized in that: The insulating medium (2) is annular, one end of the insulating medium (2) is tightly connected to one end of the upper stepped column (8), and the other end of the insulating medium (2) is close to the bowl-shaped inlet interface (4).

4. The optical aperture connector according to claim 1, characterized in that: A contact section (10) is connected between the bowl-shaped inlet interface (4) and the annular boss (6). One end of the contact section (10) is coaxially connected to the annular boss (6), and the other end of the contact section (10) is coaxially connected to the bowl-shaped inlet interface (4). The inner wall of the contact section (10) is tightly connected to the outer wall of the insulating medium (2) and has the same length.

5. The optical aperture connector according to claim 4, characterized in that: The inner diameter of the contact segment (10) is smaller than either end of the bowl-shaped inlet interface (4), the inner diameter of the contact segment (10) is larger than the inner diameter of the annular boss (6), and the inner diameter of the contact segment (10) is smaller than the outer diameter of the annular boss (6).

6. The optical aperture connector according to claim 4, characterized in that: The outer conductor (1) has an annular groove (11) at the annular boss (6).

7. The optical aperture connector according to claim 1, characterized in that: The bowl-shaped inlet interface (4) has a 30°-45° guide chamfer between the cylindrical section and the guide chamfer section.

8. The optical aperture connector according to claim 1, characterized in that: The inner diameter of the cylindrical section of the bowl-shaped inlet interface (4) is 3.75mm-3.85mm, and the depth of the cylindrical section is 2.4mm-2.6mm; The annular boss (6) has an annular width of 0.25mm-0.35mm and a thickness of 0.25mm-0.35mm.

9. The optical aperture connector according to claim 1, characterized in that: The diameter of the pin (7) is 0.45mm-0.55mm.

10. The optical aperture connector according to claim 1, characterized in that: The four pins (7) are centrally symmetrically distributed with an adjacent spacing of 2.1mm-2.2mm. The stress relief groove (9) has a width of 1mm and a depth of 0.1mm.

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