Fiber optic connector housing assembly equipment and assembly process

Abstract

This invention belongs to the field of electrical component technology, specifically relating to equipment for connecting electrical conductors, and particularly to fiber optic connector housing assembly equipment and its assembly process; one type of fiber optic connector housing assembly equipment includes: a driving component, which is rotatably disposed within the workstation and has a limiting groove in the middle for limiting a ceramic ferrule; a positioning plate, which is raised and lowered on the outer wall of the driving component and linked with the driving component; at least two limiting plates, which are slidably disposed on the side wall of the positioning plate for limiting a spring; wherein, after the ceramic ferrule is placed in the limiting groove, a spring manipulator sleeves the spring from top to bottom onto the outer wall of the ceramic ferrule; the driving component drives the positioning plate to move downward, and the limiting plate compresses the spring to expose the ceramic ferrule; a plastic upper shell is sleeved from top to bottom onto the outer wall of the ceramic ferrule, and the plastic upper shell pushes the limiting plate to retract into the positioning plate, so that the compressed spring returns to its original position and is inserted into the plastic upper shell.

Description

Technical Field

[0001] This invention belongs to the field of electrical component technology, specifically relating to equipment for connecting electrical conductors, and more particularly to fiber optic connector housing assembly equipment and its assembly process. Background Technology

[0002] As a core component of high-end optical communication, the E-2000 fiber optic connector requires precise assembly of multiple parts, including the ceramic ferrule assembly, white tube, outer shell, spring, and plastic upper shell. Currently, the assembly of E-2000 connector shells both domestically and internationally generally adopts a segmented semi-automatic or purely manual operation mode, which has the following significant drawbacks: 1. Low production efficiency: The assembly of multiple parts relies on manual feeding, positioning, and fastening, requiring frequent intervention in process transitions and resulting in a slow production cycle. For example, steps such as spring insertion and white tube flaring require manual adjustment, with the assembly time for a single product reaching several minutes, which cannot meet the needs of mass production.

[0003] 2. Poor product consistency and reliability: Manual operation is affected by factors such as skill level and fatigue, resulting in large fluctuations in key parameters such as component positioning accuracy (e.g., the fit gap between the white tube and the ceramic ferrule), spring insertion depth, and plastic part fastening force. Statistics show that the defect rate of manually assembled batches can reach 5%-10%, seriously affecting the optical performance and mechanical stability of connectors.

[0004] Therefore, it is necessary to develop a fiber optic connector housing assembly equipment and its assembly process to solve the above-mentioned technical problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0006] This disclosure provides at least one fiber optic connector housing assembly device and its assembly process.

[0007] In a first aspect, embodiments of this disclosure provide an optical fiber connector housing assembly apparatus, comprising: The driving component is rotatably mounted in the station on the side wall of the turntable, and a limiting groove for limiting the ceramic insert is provided in the middle. The positioning plate is mounted on the outer wall of the driving component and is linked to the driving component. At least two limiting plates are slidably disposed on the side wall of the positioning piece to limit the spring; After the ceramic ferrule is placed in the limiting groove, the spring manipulator will put the spring on the outer wall of the ceramic ferrule from top to bottom. The driving component drives the positioning piece to move downward, and the limiting plate compresses the spring to expose the ceramic insert. The upper plastic shell is fitted onto the outer wall of the ceramic insert from top to bottom. The upper plastic shell pushes the limiting plate and retracts into the positioning piece, so that the compressed spring returns to its original position and is inserted into the upper plastic shell.

[0008] In one optional embodiment, the outer wall of the drive member is provided with an outer spiral pattern in the circumferential direction; The inner wall of the drive component is provided with an inner spiral pattern that matches the outer spiral pattern; The outer wall of the positioning piece is provided with a guide strip along the axial direction that matches the inner wall of the workstation; When the driving component rotates circumferentially, it is suitable for driving the driving component to move up and down.

[0009] In one optional embodiment, a sponge sheet is provided on the inner wall of the positioning piece, which is disposed between the inner spiral pattern and the limiting plate; When the limiting plate compresses the spring, the sponge sheet is suitable for applying oil to the outer wall of the spring.

[0010] In one optional embodiment, an oil storage cavity is formed within the positioning piece, and the oil storage cavity is disposed above the limiting plate; An oil passage is provided axially between the oil storage cavity and the sponge sheet, and the limiting plate is adapted to open and close the oil passage. When the limiting plate retracts into the positioning plate, it opens the oil passage, allowing the grease in the oil storage chamber to flow into the sponge plate.

[0011] In one optional embodiment, the limiting plate has an inclined surface near the axial end of the driving member. When the upper shell of the plastic part is sleeved onto the outer wall of the ceramic insert from top to bottom, it abuts against the inclined surface to push the limiting plate to retract into the positioning piece.

[0012] In one optional embodiment, an oil hole is formed in the middle of the limiting plate, and the inner diameter of the oil hole is smaller than the diameter of the oil passage. When the limiting plate retracts into the positioning piece, the oil hole coincides with the oil passage.

[0013] In one optional embodiment, the positioning piece has a groove formed radially, and the limiting plate is slidably disposed in the groove, wherein the radial length of the groove is greater than the radial length of the positioning piece.

[0014] In one optional embodiment, a return spring is provided inside the slide groove, and the two ends of the return spring abut against the bottom wall of the slide groove and the end wall of the limiting plate, respectively.

[0015] In one optional embodiment, the limiting groove is rectangular; The drive component has a through hole, which communicates with the limiting groove.

[0016] Secondly, this disclosure also provides an assembly process for an optical fiber connector housing assembly device, the assembly process including: As the turntable rotates circumferentially, the ceramic ferrule is placed in the limiting groove, and then the spring robot arm places the spring on the outer wall of the ceramic ferrule from top to bottom. The driving component drives the positioning piece to move downward, and the limiting plate compresses the spring to expose the ceramic insert. The upper plastic shell is fitted onto the outer wall of the ceramic insert from top to bottom. The upper plastic shell pushes the limiting plate and retracts into the positioning piece, so that the compressed spring returns to its original position and is inserted into the upper plastic shell.

[0017] The beneficial effects of this invention are that it provides an assembly device and process for fiber optic connector housings. By employing a turntable and a robotic arm working in tandem, it achieves automated feeding and assembly, reducing manual intervention. During assembly, the precise linkage of the driving components, positioning plates, and limiting plates enables standardized control of key parameters such as spring compression depth and plastic part fastening force, avoiding fluctuations caused by manual operation, reducing the defect rate, and ensuring the optical performance and mechanical stability of the fiber optic connectors.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

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

[0021] Figure 1 A perspective view of the fiber optic connector housing assembly equipment provided in the embodiments of this disclosure; Figure 2 A perspective view of the driving component and positioning piece provided in the embodiments of this disclosure; Figure 3 An axial sectional perspective view of the positioning piece and the limiting plate provided in the embodiments of this disclosure; Figure 4 This is a schematic diagram showing the state of the ceramic ferrule not being inserted into the positioning piece, as provided in an embodiment of this disclosure. Figure 5 This is a schematic diagram showing the state of the ceramic ferrule inserted into the positioning piece according to an embodiment of this disclosure.

[0022] In the picture: 1. Driving component; 10. Limiting groove; 11. Through hole; 12. External spiral pattern; 13. Slide groove; 14. Return spring; 2. Positioning plate; 20. Inner spiral pattern; 21. Sponge sheet; 22. Oil reservoir; 23. Oil passage; 24. Guide strip; 3. Limiting plate; 30. Inclined surface; 31. Oil hole; 4. Ceramic insert; 41. Spring; 42. Plastic upper shell; 5. Turntable. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify an entire column of elements when following a column of elements. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed that the E-2000 fiber optic connector, as a core component of high-end optical communication, requires precise assembly of multiple parts, including the ceramic ferrule assembly, white tube, shell, spring, and plastic upper shell. Currently, the assembly of E-2000 connector shells both domestically and internationally generally adopts a segmented semi-automated or purely manual operation mode, which has the following significant drawbacks: 1. Low production efficiency: The assembly of multiple parts relies on manual feeding, positioning, and fastening, requiring frequent intervention in process transitions and resulting in a slow production cycle. For example, steps such as spring insertion and white tube flaring require manual adjustment, with the assembly time for a single product reaching several minutes, which cannot meet the needs of mass production.

[0029] 2. Poor product consistency and reliability: Manual operation is affected by factors such as skill level and fatigue, resulting in large fluctuations in key parameters such as component positioning accuracy (e.g., the fit gap between the white tube and the ceramic ferrule), spring insertion depth, and plastic part fastening force. Statistics show that the defect rate of manually assembled batches can reach 5%-10%, seriously affecting the optical performance and mechanical stability of connectors.

[0030] Therefore, it is necessary to develop a fiber optic connector housing assembly equipment and its assembly process to solve the above-mentioned technical problems.

[0031] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] like Figure 1 As shown, at least one embodiment provides a fiber optic connector housing assembly device, including: a turntable 5 with several stations evenly distributed around its outer wall, each station being provided with a drive component 1, a positioning plate 2, and a limiting plate 3. The turntable 5 is rotatably mounted on a worktable, which is provided with a robotic arm for loading materials and a tray for placing various fiber optic components. The robotic arm is adapted to grip the components in the tray and place them on the drive component 1.

[0035] Reference Appendix Figure 2 The drive component 1 is rotatably mounted within a station on the side wall of the turntable 5, and has a limiting groove 10 in its center for fixing the ceramic ferrule 4. The limiting groove 10 is rectangular in design to accommodate ceramic ferrules 4 of different specifications, ensuring positioning accuracy. The drive component 1 also has a through hole 11 communicating with the limiting groove 10, facilitating visual inspection or cleaning during assembly and expanding the equipment's monitorability. The outer wall of the drive component 1 has an external spiral pattern 12 for linkage with the positioning plate 2. A drive motor is located at the bottom of the turntable 5, and the drive motor is connected to the drive component 1 for driving the drive component 1 to rotate in both directions. Furthermore, this drive motor is a servo motor.

[0036] Continue to refer to the appendix Figure 2 The positioning piece 2 is mounted on the outer wall of the drive component 1 and is linked with the inner spiral pattern 20 by adapting to the outer spiral pattern 12. A guide strip 24 is axially arranged on the outer wall of the positioning piece 2, which matches the inner wall of the turntable 5 to ensure stable lifting without deviation. This prevents the positioning piece 2 from rotating with the drive component 1. This spiral pattern design draws inspiration from the thread transmission principle of precision machinery, ensuring the linear accuracy of the positioning piece 2's movement. Furthermore, the positioning piece 2 is arc-shaped.

[0037] Reference Appendix Figure 3 The positioning plate 2 has a sponge sheet 21 on its inner wall, located between the inner spiral 20 and the limiting plate 3. During the compression of the spring 41, the sponge sheet 21 automatically applies oil to the outer wall of the spring 41, reducing friction between the spring 41 and the upper plastic shell 42. This design extends the self-lubricating function of the equipment. Simultaneously, an oil storage cavity 22 is formed inside the positioning plate 2, located above the limiting plate 3, and connected to the sponge sheet 21 via an axial oil passage 23. The oil storage cavity 22 can store long-lasting grease. The opening and closing of the oil passage 23 is controlled by the movement of the limiting plate 3, achieving on-demand lubrication and avoiding grease waste.

[0038] Continue to refer to the appendix Figure 2At least two limiting plates 3 are slidably disposed within the grooves 13 on the sidewall of the positioning piece 2 to limit the spring 41. The radial length of the groove 13 is greater than the radial length of the positioning piece 2, ensuring that the limiting plates 3 have sufficient stroke to compress the spring 41. A slope 30 is provided on the end of the limiting plate 3 near the axis of the driving component 1, allowing the upper shell 42 of the plastic part to smoothly push the limiting plate 3 to retract when pressed down. The slope 30 design reduces impact force and improves assembly smoothness. An oil hole 31 is opened in the middle of the limiting plate 3, the inner diameter of which is smaller than the diameter of the oil passage 23. When the limiting plate 3 retracts into the positioning piece 2, the oil hole 31 coincides with the oil passage 23, realizing controlled flow of grease. A return spring 14 is also provided in the groove 13, with its two ends abutting against the bottom wall of the groove 13 and the end wall of the limiting plate 3, respectively, ensuring that the limiting plate 3 can automatically return to its original position without external force, enhancing the reliability of the equipment.

[0039] The working process and assembly technology are as follows: Initial loading stage: Turntable 5 rotates circumferentially, moving the workpiece to the ceramic ferrule 4 loading area. The robotic arm places the ceramic ferrule 4 into the limiting groove 10 of the drive component 1. The rectangular design of the limiting groove 10 ensures that the ferrule is positioned without wobbling, and the through hole 11 allows for real-time detection of the ferrule position, meeting the industry requirements for first-piece inspection.

[0040] Spring 41 Fitting and Compression Stage: Turntable 5 continues to rotate, moving the workpiece to the spring 41 loading area. The spring robot fits spring 41 onto the outer wall of the ceramic insert 4. Subsequently, drive component 1 rotates circumferentially, driving positioning plate 2 downward through the adaptation of outer spiral pattern 12 and inner spiral pattern 20. Guide strip 24 ensures the movement trajectory is vertical, avoiding skewing. Limiting plate 3, driven by positioning plate 2, squeezes spring 41, compressing it until the ceramic insert 4 is exposed. During this process, sponge sheet 21 applies oil to the outer wall of spring 41, reducing compression resistance; simultaneously, the compression of limiting plate 3 triggers oil storage chamber 22 to release grease through oil passage 23, achieving dynamic lubrication.

[0041] Assembly stage of the upper plastic shell 42: The turntable 5 continues to rotate, moving the workpiece to the loading area of ​​the upper plastic shell 42. The robotic arm grips the upper plastic shell 42 and places it onto the outer wall of the ceramic insert 4 from top to bottom. When the upper plastic shell 42 abuts against the inclined surface 30 of the limiting plate 3, the pushing limiting plate 3 retracts into the positioning piece 2. The oil hole 31 coincides with the oil channel 23, and the grease in the oil storage cavity 22 flows into the sponge piece 21 to reserve lubrication for subsequent assembly. The compressed spring 41 returns to its original position after the limiting plate 3 retracts and inserts into the upper plastic shell 42, completing the fastening. The return spring 14 ensures that the limiting plate 3 returns to its original position quickly, ready for the next cycle.

[0042] The entire process is carried out in a cycle driven by turntable 5, achieving fully automated assembly line operation. This equipment can be integrated with a sensor vision system to monitor the compression depth and grease level of spring 41 in real time, further enhancing its level of intelligence.

[0043] The design of this invention fully considers the high-precision requirements of the fiber optic connector assembly industry: Precision control: Through the linkage of the limiting plate 3 and the positioning piece 2, the insertion depth error of the spring 41 is ensured to be less than 0.1mm, which meets the stringent standard of the E-2000 connector for ferrule alignment.

[0044] Lubrication optimization: The automatic lubrication system avoids the unevenness of manual lubrication, reduces component wear, and is especially suitable for optical communication equipment in high-vibration environments.

[0045] Scalability: The modular design of the equipment allows for the adaptation of different connector assemblies. For example, by changing the limiting slot 10, it can handle SC or LC type ferrules, thus improving the equipment's versatility.

[0046] At least one embodiment also provides an assembly process for an optical fiber connector housing assembly apparatus, the assembly process comprising: As the turntable 5 rotates circumferentially, the ceramic ferrule 4 is placed in the limiting groove 10, and the spring manipulator places the spring 41 from top to bottom onto the outer wall of the ceramic ferrule 4. The driving component 1 drives the positioning piece 2 to move downward, and the limiting plate 3 compresses the compression spring 41 to expose the ceramic insert 4; The upper plastic shell 42 is fitted onto the outer wall of the ceramic insert 4 from top to bottom. The upper plastic shell 42 pushes the limiting plate 3 to retract into the positioning piece 2, so that the compressed spring 41 returns to its original position and is inserted into the upper plastic shell 42.

[0047] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0048] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0049] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fiber optic connector housing assembly device, characterized in that, include: The drive unit (1) is rotatably mounted in the work station on the side wall of the turntable, and a limiting groove (10) for limiting the ceramic insert (4) is provided in the middle. The positioning piece (2) is raised and lowered on the outer wall of the driving component (1) and is linked with the driving component (1); At least two limiting plates (3) are slidably disposed on the side wall of the positioning piece (2) for limiting the spring (41). After the ceramic ferrule (4) is placed in the limiting groove (10), the spring manipulator puts the spring (41) on the outer wall of the ceramic ferrule (4) from top to bottom. The driving component (1) drives the positioning piece (2) to move downward, and the limiting plate (3) compresses the spring (41) to expose the ceramic insert (4). The upper plastic shell (42) is fitted onto the outer wall of the ceramic insert (4) from top to bottom. The upper plastic shell (42) pushes the limiting plate (3) to retract into the positioning piece (2) so that the compressed spring (41) returns to its original position and is inserted into the upper plastic shell (42).

2. The fiber optic connector housing assembly equipment as described in claim 1, characterized in that, The outer wall of the drive component (1) is provided with an outer spiral pattern (12) in the circumferential direction. The inner wall of the drive component (1) is provided with an inner spiral pattern (20) that is compatible with the outer spiral pattern (12). The outer wall of the positioning piece (2) is provided with a guide strip (24) that matches the inner wall of the workstation along the axial direction. When the drive component (1) rotates circumferentially, it is suitable for driving the drive component (1) to move up and down.

3. The fiber optic connector housing assembly equipment as described in claim 2, characterized in that, The inner wall of the positioning piece (2) is provided with a sponge piece (21), which is located between the inner spiral pattern (20) and the limiting plate (3); When the limiting plate (3) compresses the spring (41), the sponge sheet (21) is suitable for applying oil to the outer wall of the spring (41).

4. The fiber optic connector housing assembly equipment as described in claim 3, characterized in that, An oil storage cavity (22) is provided inside the positioning piece (2), and the oil storage cavity (22) is located above the limiting plate (3); An oil passage (23) is provided axially between the oil storage cavity (22) and the sponge sheet (21), and the limiting plate (3) is adapted to open and close the oil passage (23). When the limiting plate (3) retracts into the positioning piece (2), the oil passage (23) is opened, and the grease in the oil storage cavity (22) is suitable to flow into the sponge piece (21).

5. The fiber optic connector housing assembly equipment as described in claim 1, characterized in that, The limiting plate (3) has an inclined surface (30) near the shaft end of the driving component (1). When the plastic upper shell (42) is sleeved on the outer wall of the ceramic insert (4) from top to bottom, it abuts against the inclined surface (30) to push the limiting plate (3) to retract into the positioning piece (2).

6. The fiber optic connector housing assembly equipment as described in claim 4, characterized in that, An oil hole (31) is provided in the middle of the limiting plate (3), and the inner diameter of the oil hole (31) is smaller than the diameter of the oil passage (23); When the limiting plate (3) retracts into the positioning piece (2), the oil hole (31) coincides with the oil passage (23).

7. The fiber optic connector housing assembly equipment as described in claim 6, characterized in that, The positioning piece (2) has a groove (13) in the radial direction, and the limiting plate (3) is slidably disposed in the groove (13). The radial length of the groove (13) is greater than the radial length of the positioning piece (2).

8. The fiber optic connector housing assembly equipment as described in claim 7, characterized in that, A reset spring (14) is provided inside the slide groove (13), and the two ends of the reset spring (14) abut against the bottom wall of the slide groove (13) and the end wall of the limiting plate (3), respectively.

9. The fiber optic connector housing assembly equipment as described in claim 1, characterized in that, The limiting groove (10) is rectangular; A through hole (11) is provided in the drive component (1), and the through hole (11) is connected to the limiting groove (10).

10. An assembly process for an optical fiber connector housing assembly device, characterized in that, The assembly process using the fiber optic connector housing assembly equipment as described in any one of claims 1-9 includes: As the turntable rotates circumferentially, the ceramic insert (4) is placed in the limiting groove (10), and the spring manipulator places the spring (41) on the outer wall of the ceramic insert (4) from top to bottom. The driving component (1) drives the positioning piece (2) to move downward, and the limiting plate (3) compresses the spring (41) to expose the ceramic insert (4). The upper plastic shell (42) is fitted onto the outer wall of the ceramic insert (4) from top to bottom. The upper plastic shell (42) pushes the limiting plate (3) to retract into the positioning piece (2) so that the compressed spring (41) returns to its original position and is inserted into the upper plastic shell (42).

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