Trousering rubber pressing roller

Abstract

The utility model belongs to the technical field of printing, and particularly relates to a trousering rubber-pressing roller which comprises a roller body, a rubber-pressing roller body, a rubber-pressing roller body, a rubber-pressing roller body and a rubber-pressing roller body, and butt joint grooves are formed in the two ends of the roller body; the roller body is sleeved with the replacement layer, and ink cells are formed in the surface of the replacement layer; the sealing covers are arranged at the two ends of the roller body and used for fixing the replacement layer, each sealing cover comprises a cover body and a butt joint, and the butt joints are matched with the butt joint grooves; the roller further comprises a fastening assembly which is arranged on the sealing cover and the roller body and used for fixing the sealing cover. The sealing cover has the beneficial effects that by arranging the fastening assembly, the sealing cover can be further fixed, and the sealing cover is prevented from loosening or falling off in the working process.

Description

Technical Field

[0001] This application belongs to the field of printing technology, and in particular relates to a trouser fabric pressing roller. Background Technology

[0002] For existing technology of pressure rollers, please refer to Chinese invention patent application publication number CN108049227A, which discloses a hot stamping process for fabric. It includes the following steps: Step 1, hot stamping film adhesive application process, in which a pattern roller passes through an adhesive tank on the surface of the hot stamping film, so that the adhesive forms a pattern on the hot stamping film. The pattern roller is a laser-engraved intaglio plate, and the hot stamping film is an electroplated aluminum foil with color attached. Through adhesive application, the electroplated aluminum foil on the film is adhered to the fabric to form a pattern.

[0003] The patent with publication number CN213114078U discloses a trouser fabric pressing roller and a mounting frame for using the pressing roller, including a roller body, a metal layer slidably sleeved on the outer wall of the roller body, and a mesh opening on the metal layer, and a fixing component for fixing the metal layer is provided on the roller body.

[0004] The aforementioned patent uses the combination of a cap and a roller to fix the metal layer. Although this can achieve the effect of replacing the metal layer, the cap and the solid are connected by a single thread. Repeated changes in the pattern, i.e., repeated installation and disassembly, will cause the thread to wear, thereby reducing the sealing effect of the cap. In severe cases, it may even be impossible to seal it properly, so improvements are needed. Summary of the Invention

[0005] The purpose of this application is to provide a trouser fabric pressing roller that can solve the above-mentioned problems.

[0006] The purpose of this application is to provide a trouser fabric pressing roller, comprising:

[0007] The roller body has mating grooves at both ends;

[0008] The replacement layer is fitted onto the roller body, and its surface has mesh openings;

[0009] The caps, located at both ends of the roller body, are used to fix the replacement layer. They include the cap body and the butt joint, which mates with the mating groove.

[0010] It also includes fastening components, which are installed on the cap and roller body and used to secure the cap.

[0011] The aforementioned trouser fabric sealing roller uses a roller body as its main body, with mating grooves at both ends for engaging with the mating joints of the caps to achieve cap positioning and installation. A replaceable layer is fitted onto the roller body, its surface having pores to form specific patterns or textures during the sealing process. This replaceable layer design allows users to easily change sealing layers with different patterns as needed, improving the equipment's flexibility and applicability. Caps are located at both ends of the roller body to secure the replaceable layer. Each cap includes a cover body and a mating joint, which fits tightly with the mating grooves on the roller body, ensuring the cap is securely installed. Furthermore, this application includes a fastening assembly on the cap and roller body to further secure the cap, preventing it from loosening or falling off during operation. This fastening assembly not only improves the cap's securing effect but also avoids thread wear caused by repeated installation and disassembly, ensuring the cap will not loosen or fall off during the sealing process, thus guaranteeing the sealing quality.

[0012] Furthermore, the fastening assembly includes:

[0013] The first groove is provided on the roller body, and a docking component is provided inside it. The docking component is provided with a threaded hole.

[0014] The second groove is provided on the cover, and a first through hole penetrating the cover is provided inside it;

[0015] Fastener, comprising a limiting section and a rod, the rod having threads;

[0016] The fastener passes through the first through hole and then engages with the threaded hole.

[0017] The first groove is located at both ends of the roller body, and its interior contains a mating assembly with threaded holes for engaging with the threaded section of a fastener to achieve a tightening effect. The second groove is located at the corresponding position on the cap, aligned with the first groove, and contains a first through hole penetrating the cap. This through hole provides a channel for the fastener, allowing it to pass smoothly through the cap and engage with the threaded hole on the roller body. The fastener includes a limiting section and a rod portion for securing the cap and roller body together. The rod portion of the fastener is threaded, engaging with the threaded hole of the mating assembly on the roller body. By rotating the fastener, a tight connection between the cap and roller body can be achieved.

[0018] When installing the cap, first align the cap's connector with the mating groove on the roller body and insert it to ensure the cap is initially positioned on the roller body. Next, pass the fastener through the first through hole in the second groove of the cap, aligning the fastener's shank with the threaded hole on the roller body. Then rotate the fastener until the thread on its shank tightly engages with the threaded hole, until the limiting section is in close contact with the inner surface of the cap. At this point, the cap is securely fixed to the roller body. Through the design of the fastening assembly, the trouser fabric pressing roller of this application achieves a reliable connection between the cap and the roller body, avoiding thread wear caused by repeated installation and disassembly, and also providing ease of installation and disassembly, reducing maintenance costs.

[0019] Furthermore: the docking component includes:

[0020] The limiting component includes a support part and a connecting part, the connecting part is provided with a second through hole, and a receiving cavity is formed between the support part and the connecting part;

[0021] The plug-in block is located inside the receiving cavity, and the threaded hole is located inside the plug-in block;

[0022] The first through hole, the second through hole, and the threaded hole are located on the same axis.

[0023] The limiting component includes a support portion and a connecting portion, forming a structure for supporting and fixing the plug-in block. The connecting portion has a second through hole, which aligns with the first groove and provides a channel for the fastener. A receiving cavity is formed between the support portion and the connecting portion to accommodate the plug-in block. The plug-in block is disposed within the receiving cavity and is used to engage with the fastener to achieve a fastening effect. The plug-in block has a threaded hole that engages with the thread on the shank of the fastener, allowing for a tight connection by rotating the fastener. Simultaneously, the design of the plug-in block allows it to be removed and replaced from the receiving cavity, and it can be replaced when the threaded hole wears due to prolonged use or frequent disassembly and assembly.

[0024] When the threaded hole wears down due to prolonged use or frequent disassembly, users can easily remove and replace the connector block without replacing the entire docking assembly or roller body, thus reducing maintenance costs. Furthermore, the modular design improves the maintainability and durability of the equipment. Users can replace worn parts individually as needed, rather than the entire device, which helps extend the equipment's lifespan and reduce overall costs.

[0025] Furthermore, an isolation protrusion is provided in the second groove, and an isolation cap is provided on the isolation protrusion. The first through hole extends upward and penetrates the isolation protrusion, and a third through hole is provided on the isolation cap for the rod to pass through.

[0026] The bottom of the second groove features an isolation protrusion to ensure adequate support for the fastener during installation. An isolation cap is positioned on top of the isolation protrusion and connected to it via threads, forming a support structure. The isolation cap has a third through hole, which is coaxial with the first and second through holes, providing a passage for the fastener. The isolation protrusion extends the fastening length, thereby improving the fastening effect. The isolation cap not only provides support but also helps prevent damage to the cap from over-tightening during installation.

[0027] Furthermore, the diameters of the first and second through holes are larger than the diameter of the rod, and a gap is formed between the first through hole and the rod, while the diameter of the third through hole is the same as that of the rod.

[0028] The first through hole is located within the second groove of the cap, and the second through hole is located on the connecting part of the limiting member. The diameters of both through holes are larger than the diameter of the fastener rod. Because the diameter of the through holes is larger than the rod, the fastener can rotate freely within the through holes during installation without directly contacting the edge of the through holes, creating a gap and reducing the possibility of friction and wear. The third through hole is located on the isolation cap, and its diameter is set to be the same as the diameter of the fastener rod, ensuring that the fastener rod remains stable when passing through the isolation cap, preventing wobbling or loosening.

[0029] Furthermore, a spring is installed within the gap, with the spring sleeved outside the rod. A compression ring is installed on the rod that contacts the top of the spring, the bottom of the spring contacts the insertion block, and an annular protrusion is installed on the connecting part that contacts the outer wall of the spring.

[0030] In this embodiment, a spring is provided within the gap formed between the first and second through holes and the fastener rod. The spring is sleeved outside the rod and can maintain a stable position when the rod rotates. A compression ring is provided on the fastener rod, which contacts the top of the spring. When the fastener is tightened, the compression ring gradually compresses the spring, causing it to generate elastic force. An annular protrusion is provided on the connecting part of the limiting member, which contacts the outer wall of the spring and serves to block the spring. The plug block provides a stable support point for the spring, ensuring that the spring can maintain the correct position when compressed.

[0031] During cap installation, fasteners are inserted into the first, second, and third through holes and gradually tightened. As the fasteners rotate, the compression ring gradually compresses the spring, causing it to spring back. This spring force provides an additional preload to the fastener, enhancing the tightening effect. When the cap needs to be removed, simply reverse the rotation of the fastener; the spring force will gradually release, assisting the fastener in being pulled out of the through holes, thus simplifying the removal process.

[0032] The beneficial effects of this application are:

[0033] 1. By setting fastening components, the cover can be further secured to prevent it from loosening or falling off during operation;

[0034] 2. The fastening components not only improve the fastening effect of the cap, but also avoid the problem of thread wear caused by repeated installation and disassembly, ensuring that the cap will not loosen or fall off during the pressing process, thereby guaranteeing the pressing quality.

[0035] 3. When the threaded hole wears down due to prolonged use or frequent disassembly, users can easily remove and replace the connector block without replacing the entire docking assembly or roller body, thus reducing maintenance costs. Furthermore, the modular design improves the maintainability and durability of the equipment. Users can replace worn parts individually as needed, rather than the entire device, which helps extend the equipment's lifespan and reduce overall costs. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model;

[0037] Figure 2 This is a schematic diagram of the disassembly structure of this utility model;

[0038] Figure 3 This is a structural schematic diagram of the fastening component of this utility model.

[0039] The reference numerals in the figure are as follows: 100, roller body; 110, docking groove; 200, replacement layer; 210, mesh cavity; 300, cover; 310, cap body; 320, joint; 400, fastening assembly; 410, first groove; 420, docking assembly; 421, limiting component; 422, support part; 423, connecting part; 424, second through hole; 425, storage cavity; 426, plug-in block; 430, threaded hole; 440, second groove; 441, isolation protrusion; 442, isolation cap; 443, third through hole; 450, first through hole; 460, fastener; 461, limiting section; 462, rod part; 500, spring; 510, extrusion ring; 520, annular protrusion. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] The trouser fabric pressing roller provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0043] Example 1:

[0044] like Figures 1 to 3 As shown, this application embodiment provides a trouser fabric pressing roller, comprising:

[0045] Roller body 100, with docking grooves 110 at both ends;

[0046] Replacement layer 200 is fitted onto roller body 100, and its surface has mesh holes 210;

[0047] The cover 300 is disposed at both ends of the roller body 100 and is used to fix the replacement layer 200. It includes a cover body 310 and a connector 320, which mates with the mating groove 110.

[0048] It also includes a fastening assembly 400, which is disposed on the cover 300 and the roller body 100 and is used to fix the cover 300.

[0049] In some embodiments of this application, such as Figure 1As shown, the above-mentioned trouser fabric sealing roller uses a roller body 100 as the main body of the sealing roller. Both ends of the roller body have mating grooves 110 for engaging with the mating joints 320 of the cap 300, thus positioning and installing the cap 300. A replaceable layer 200 is fitted onto the roller body 100. The surface of the replaceable layer 200 has openings 210 for forming specific patterns or textures during the sealing process. The design of the replaceable layer 200 allows users to easily replace sealing layers with different patterns as needed, improving the flexibility and applicability of the equipment. The caps 300 are located at both ends of the roller body 100 to fix the replaceable layer 200. The cap 300 includes a cover body 310 and a mating joint 320. The mating joint 320 fits tightly with the mating grooves 110 on the roller body 100, ensuring that the cap 300 can be securely installed on the roller body 100. Meanwhile, this application includes a fastening component 400, which is disposed on the cap 300 and the roller 100 to further secure the cap 300 and prevent it from loosening or falling off during operation. The fastening component 400 not only improves the securing effect of the cap 300 but also avoids thread wear caused by repeated installation and disassembly, ensuring that the cap 300 will not loosen or fall off during the adhesive bonding process, thereby guaranteeing the adhesive bonding quality.

[0050] Example 2:

[0051] This application provides a trouser fabric pressing roller, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0052] like Figure 2 and Figure 3 As shown, the fastening assembly 400 includes:

[0053] The first groove 410 is provided on the roller body 100, and a docking component 420 is provided inside it. The docking component 420 is provided with a threaded hole 430.

[0054] The second groove 440 is provided on the cover 300, and a first through hole 450 penetrating the cover 300 is provided inside it.

[0055] Fastener 460 includes a limiting section 461 and a rod 462, the rod 462 being provided with threads;

[0056] Among them, the fastener 460 passes through the first through hole 450 and then engages with the threaded hole 430.

[0057] In this embodiment, a first groove 410 is disposed at both ends of the roller body 100, and a mating assembly 420 is disposed inside it. The mating assembly 420 is provided with a threaded hole 430 for engaging with the threaded section of the fastener 460 to achieve a fastening effect. A second groove 440 is disposed at the corresponding position of the cover 300, aligned with the first groove 410, and is provided with a first through hole 450 penetrating the cover 300. This through hole provides a channel for the fastener 460, allowing it to pass smoothly through the cover 300 and engage with the threaded hole 430 on the roller body 100. The fastener 460 includes a limiting section 461 and a rod portion 462 for achieving a tight connection between the cover 300 and the roller body 100. The rod portion 462 of the fastener 460 is provided with a thread, which engages with the threaded hole 430 of the mating assembly 420 on the roller body 100. By rotating the fastener 460, a tight connection between the cover 300 and the roller body 100 can be achieved.

[0058] When installing the cover 300, first align and insert the connector 320 of the cover 300 with the mating groove 110 on the roller body 100 to ensure that the cover 300 is initially positioned on the roller body 100. Next, pass the fastener 460 through the first through hole 450 in the second groove 440 of the cover 300, so that the rod portion 462 of the fastener 460 is aligned with the threaded hole 430 on the roller body 100. Then rotate the fastener 460 so that the thread of its rod portion 462 is tightly engaged with the threaded hole 430 until the limiting section 461 is in close contact with the inner surface of the cover 300. At this point, the cover 300 is firmly fixed to the roller body 100. Through the design of the fastening assembly 400, the trouser fabric pressing roller of this application achieves a reliable connection between the cover 300 and the roller body 100, avoids the problem of thread wear caused by repeated installation and disassembly, and also provides the convenience of easy installation and disassembly, reducing maintenance costs.

[0059] Example 3:

[0060] This application provides a trouser fabric pressing roller, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0061] like Figure 2 and Figure 3 As shown, the docking component 420 includes:

[0062] The limiting member 421 includes a support part 422 and a connecting part 423. The connecting part 423 is provided with a second through hole 424, and a receiving cavity 425 is formed between the support part 422 and the connecting part 423.

[0063] The plug-in block 426 is disposed in the receiving cavity 425, and the threaded hole 430 is located in the plug-in block 426;

[0064] The first through hole 450, the second through hole 424, and the threaded hole 430 are located on the same axis.

[0065] In this embodiment, the limiting member 421 includes a support portion 422 and a connecting portion 423, forming a structure for supporting and fixing the plug-in block 426. The connecting portion 423 has a second through hole 424, which aligns with the first groove 410 and provides a channel for the fastener 460. A receiving cavity 425 is formed between the support portion 422 and the connecting portion 423 to accommodate the plug-in block 426. The plug-in block 426 is disposed within the receiving cavity 425 and is used to cooperate with the fastener 460 to achieve a fastening effect. A threaded hole 430 is provided within the plug-in block, which engages with the thread on the rod portion 462 of the fastener 460. A fastening connection can be achieved by rotating the fastener 460. Simultaneously, the design of the plug-in block 426 allows it to be removed and replaced from the receiving cavity 425, and can be replaced when the threaded hole 430 wears down due to prolonged use or frequent disassembly and assembly.

[0066] When the threaded hole 430 wears down due to prolonged use or frequent disassembly and assembly, the user can easily remove and replace the connector 426 without replacing the entire docking assembly 420 or roller body 100, thus reducing maintenance costs. Furthermore, the modular design improves the maintainability and durability of the equipment. Users can replace worn parts individually as needed, rather than the entire device, which helps extend the equipment's lifespan and reduce overall costs.

[0067] Furthermore, an isolation protrusion 441 is provided in the second groove 440, an isolation cap 442 is provided on the isolation protrusion 441, the first through hole 450 extends upward and penetrates the isolation protrusion 441, and a third through hole 443 is provided on the isolation cap 442 for the rod part 462 to pass through.

[0068] An isolation protrusion 441 is provided at the bottom of the second groove 440 to ensure that the fastener 460 is adequately supported during installation. An isolation cap 442 is located on top of the isolation protrusion 441 and is threadedly connected to it, forming a support structure. The isolation cap 442 has a third through hole 443, which is coaxial with the first through hole 450 and the second through hole 424, providing a channel for the fastener 460. The isolation protrusion 441 extends the fastening length, thereby improving the fastening effect. The isolation cap 442 not only provides support but also, to some extent, prevents the fastener 460 from being damaged by over-tightening during installation, thus protecting the cover 300.

[0069] Example 4:

[0070] This application provides a trouser fabric pressing roller, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0071] like Figure 2 and Figure 3 As shown, the diameters of the first through hole 450 and the second through hole 424 are larger than the diameter of the rod 462, and a gap is formed between the first through hole 450 and the rod 462. The diameter of the third through hole 443 is the same as that of the rod 462.

[0072] In this embodiment, a first through hole 450 is disposed within the second groove 440 of the cap 300, and a second through hole 424 is disposed on the connecting portion 423 of the limiting member 421. The diameters of both through holes are larger than the diameter of the rod portion 462 of the fastener 460. Because the diameter of the through holes is larger than that of the rod portion 462, the fastener 460 can rotate freely within the through holes during installation without directly contacting the edge of the through holes, creating a gap and reducing the possibility of friction and wear. A third through hole 443 is disposed on the isolation cap 442, and its diameter is set to be the same as that of the rod portion 462 of the fastener 460, ensuring that the rod portion 462 of the fastener 460 remains stable when passing through the isolation cap 442, preventing shaking or loosening.

[0073] Example 5:

[0074] This application provides a trouser fabric pressing roller, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0075] like Figure 2 and Figure 3 As shown, a spring 500 is provided in the gap, the spring 500 is sleeved on the outside of the rod 462, the rod 462 is provided with a compression ring 510 that contacts the top of the spring 500, the bottom of the spring 500 contacts the plug block 426, and the connecting part 423 is provided with an annular protrusion 520 that contacts the outer wall of the spring 500.

[0076] In this embodiment, a spring 500 is provided within the gap formed between the first through hole 450, the second through hole 424, and the rod portion 462 of the fastener 460. The spring 500 is sleeved on the outside of the rod portion 462 and can maintain a stable position when the rod portion 462 rotates. A compression ring 510 is provided on the rod portion 462 of the fastener 460, which contacts the top of the spring 500. When the fastener 460 is tightened, the compression ring 510 gradually compresses the spring 500, causing it to generate elastic force. An annular protrusion 520 is provided on the connecting portion 423 of the limiting member 421, which contacts the outer wall of the spring 50 and serves to block the spring 500. The plug block 426 provides a stable support point for the spring 500, ensuring that the spring 500 can maintain the correct position when compressed.

[0077] When installing the cover 300, the fastener 460 is inserted into the first through hole 450, the second through hole 424, and the third through hole 443, and gradually tightened. As the fastener 460 rotates, the compression ring 510 gradually compresses the spring 500, causing the spring 500 to generate elastic force. This elastic force provides an additional preload to the fastener 460, enhancing the fastening effect. When it is necessary to remove the cover 300, simply rotate the fastener 460 in the opposite direction; the elastic force of the spring 500 will gradually release, assisting the fastener 460 in being pulled out of the through holes, thus simplifying the disassembly process.

[0078] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0079] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A trouser fabric pressing roller, characterized in that: include: The roller body (100) has docking grooves (110) at both ends; Replacement layer (200) is fitted onto roller body (100), and its surface is provided with mesh holes (210); A cover (300) is provided at both ends of the roller body (100) for fixing the replacement layer (200), including a cover body (310) and a connector (320), the connector (320) cooperating with the mating groove (110); It also includes a fastening assembly (400) disposed on the cover (300) and the roller (100) and used to fix the cover (300).

2. The trouser fabric pressing roller according to claim 1, characterized in that: The fastening assembly (400) includes: The first groove (410) is provided on the roller body (100), and a docking component (420) is provided inside it. The docking component (420) is provided with a threaded hole (430). The second groove (440) is provided on the cover (300), and a first through hole (450) penetrating the cover (300) is provided inside it; The fastener (460) includes a limiting section (461) and a rod (462) having threads on the rod (462); The fastener (460) passes through the first through hole (450) and then engages with the threaded hole (430).

3. The trouser fabric pressing roller according to claim 2, characterized in that: The docking assembly (420) includes: The limiting member (421) includes a support part (422) and a connecting part (423). The connecting part (423) is provided with a second through hole (424), and a receiving cavity (425) is formed between the support part (422) and the connecting part (423). The plug-in block (426) is disposed in the receiving cavity (425), and the threaded hole (430) is located in the plug-in block (426); The first through hole (450), the second through hole (424), and the threaded hole (430) are located on the same axis.

4. The trouser fabric pressing roller according to claim 3, characterized in that: An isolation protrusion (441) is provided in the second groove (440), and an isolation cap (442) is provided on the isolation protrusion (441). The first through hole (450) extends upward and penetrates the isolation protrusion (441), and the isolation cap (442) is provided with a third through hole (443) for the rod part (462) to pass through.

5. The trouser fabric pressing roller according to claim 4, characterized in that: The diameters of the first through hole (450) and the second through hole (424) are larger than the diameter of the rod (462), and a gap is formed between the first through hole (450) and the rod (462). The diameter of the third through hole (443) is the same as that of the rod (462).

6. The trouser fabric pressing roller according to claim 5, characterized in that: A spring (500) is provided in the gap. The spring (500) is sleeved on the outside of the rod (462). A compression ring (510) is provided on the rod (462) to contact the top of the spring (500). The bottom of the spring (500) contacts the plug block (426). An annular protrusion (520) is provided on the connecting part (423) to contact the outer wall of the spring (500).

Images