A two-tube booster
By designing a dual-tube booster, the problems of inaccurate ingredient ratios, complex operation, and difficult cleaning in existing two-component oral care products have been solved, achieving precise proportioning and uniform mixing, and improving ease of use.
Patent Information
- Application Number
- CN202520317751.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Existing two-component oral care products are difficult to use with precise ingredient ratios, are complicated to operate, and are prone to waste and cleaning difficulties.
Design a dual-tube booster comprising multiple parallel tubes and booster components. Through the cooperation of the sliding seat and the booster components, precise extrusion and mixing of different ingredients in pastes or gels can be achieved. Equipped with a discharge component and a sealing component to improve ease of operation and uniformity of mixing.
It enables precise proportioning and uniform mixing of different ingredients in creams or gels, simplifying the operation process, reducing waste and cleaning difficulties, and improving the user experience.
Smart Images
Figure CN224671935U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oral care products and auxiliary equipment, and in particular to a dual-tube booster. Background Technology
[0002] Most oral care products on the market are currently single-ingredient pastes applied manually. While these products meet user needs to some extent, in certain applications, such as the treatment and prevention of complex oral diseases, single-ingredient products often fail to achieve ideal antibacterial effects. In recent years, with technological advancements, attention has shifted to the synergistic effects of combining multiple active ingredients, particularly in oral care, where research into two-component or multi-component products has become increasingly popular. However, existing two-component oral care products typically require users to mix them themselves, which not only increases the difficulty of use but may also lead to reduced efficacy or even ineffectiveness due to improper mixing.
[0003] To overcome this problem, some manufacturers have introduced dual-tube packaging containers with independent storage chambers, allowing users to store different components in two separate containers and then mix them through a common outlet before use. This design effectively avoids the instability and unevenness caused by pre-mixing. However, these products generally have the following drawbacks: inaccurate ratios: due to the lack of precise metering devices, it is difficult to ensure that the ratio of the two components remains consistent each time; complex operation: users need to manually squeeze the two different tubes, which is inconvenient and prone to waste; difficult cleaning: after long-term use, residues may clog the outlet, affecting subsequent use.
[0004] Regarding the aforementioned technologies, in existing technologies, when oral care products with different ingredients are required, independent dual-tube packaging containers cannot ensure accurate proportions and are not easy to operate. Therefore, there is an urgent need for a device that can improve the accuracy of product proportions and simplify operation. Utility Model Content
[0005] To improve the accuracy of product proportioning and simplify operation, this application provides a dual-tube booster.
[0006] This application provides a dual-tube booster, which adopts the following technical solution: A dual-tube booster, characterized in that it comprises a container body and a booster component; The container body includes at least two tubes, and multiple tubes are arranged in parallel and side by side. Adjacent tubes are fixedly connected. One end of each tube is a discharge port, and the other end is a push port. Each of the tubes is provided with a sliding seat, the outer wall of the sliding seat is in contact with the inner wall of the tube, and the sliding seat is slidably connected to the tube along the length of the tube; The pusher is provided in multiple ways, and the pusher is correspondingly arranged with the tube body. The pusher slides parallel to the tube length direction of the tube body. The multiple pushers are arranged parallel and spaced apart. Adjacent pushers are fixed by a first connector to make a gap between adjacent pushers. One end of each pusher is located in the tube body and slides along the tube length direction of the tube body. One end of the pusher abuts against the side of the sliding seat near the push port.
[0007] By adopting the above technical solution, and by setting multiple fixedly connected tubes, pastes or gels of different components can be placed in one tube. By setting a sliding seat in the tube and sliding the sliding seat along the length of the tube, the paste or gel is located above the sliding seat. By setting a pusher, the pusher is set corresponding to the tube. Each pusher is inserted into the tube and further abuts against the sliding seat. The pusher slides along the length of the tube, further driving the sliding seat to slide, thereby simultaneously extruding gels or pastes of different components from multiple tubes. The operation is simple and improves the accuracy of product proportioning.
[0008] Optionally, a positioning element is fixedly connected to one end of the pusher near the sliding seat, and a positioning groove is formed on the side of the sliding seat near the push port along the length of the tube to accommodate the positioning element.
[0009] By adopting the above technical solution, in order to further enable each booster to be positioned on the corresponding sliding seat, a positioning element is set on the booster, and a positioning groove is opened on the sliding seat to accommodate the positioning element. When the positioning element is located in the positioning groove of the sliding seat, the booster and the corresponding sliding seat are positioned so that the booster can push the sliding seat to slide.
[0010] Optionally, it also includes a discharge assembly, which includes a second connector, a first discharge pipe, and a plurality of second discharge pipes. The second connector is hollow and has a plurality of second discharge pipes fixedly connected to it. Each second discharge pipe is correspondingly provided with one of the discharge ports. The inlet end of the second discharge pipe is inserted into the discharge port of the pipe body. The inlet end of the first discharge pipe is fixedly connected to the side of the second connector away from the second discharge pipe. The first discharge pipe is arranged parallel to the length direction of the pipe body.
[0011] By adopting the above technical solution, when applying the dressing, it is generally necessary to mix the ointments of different ingredients before application. In order to mix the gels of different degrees squeezed out from the two tubes, a discharge component is set up. When the two pushers drive the two ointments of different ingredients to be squeezed out through the discharge port via the sliding seat, the ointments further enter the second discharge pipe through the second connector from the first discharge pipe. The two ointments further enter the second discharge pipe, mix, and are squeezed out.
[0012] Optionally, a mixing component is provided inside the first discharge pipe, and the mixing component is parallel to the length direction of the first discharge pipe.
[0013] By adopting the above technical solution, in order to further improve the uniformity of the mixing of the two components in the paste, a mixing component is provided in the second discharge pipe. After the paste or gel passes through the mixing component of the first discharge pipe, the further mixing component improves the uniformity of the mixing of the two components in the paste.
[0014] Optionally, the discharge assembly further includes a third discharge pipe, the inlet end of which is detachably connected to the outlet end of the first discharge pipe, the diameter of the third discharge pipe is smaller than that of the first discharge pipe, and the third discharge pipe is inclined.
[0015] By adopting the above technical solution, in order to further control the amount of extruded paste and reduce the occurrence of excessive extrusion, a third discharge pipe is set. The diameter of the third discharge pipe is smaller than that of the second discharge pipe, and the third discharge pipe is set at an angle so that the angled third discharge port guides the paste or gel, making it easier to extrude.
[0016] Optionally, the discharge assembly further includes a first housing, which is sleeved on the outside of the second connector, and a first through hole is provided on the first housing for the first discharge pipe to pass through.
[0017] By adopting the above technical solution, a first housing is provided to protect the first and second discharge pipes.
[0018] Optionally, on the multiple tubes arranged side by side, a first snap-fit member is fixedly connected to one side of two of the tubes at both ends, and a receiving area for accommodating the first housing is formed between the two first snap-fit members. One of the first snap-fit members has a first snap-fit groove extending through the tube along the tube length direction. A second snap-fit member is fixedly connected to the side wall of the first housing. The second snap-fit member is inserted into the first snap-fit groove, and the outer side wall of the first housing contacts the side of the first snap-fit member near the receiving area.
[0019] By adopting the above technical solution, in order to fix the first housing to the two tubes, the second snap-fit member is inserted into the first snap-fit groove, and the outer wall of the first housing contacts the side of the first snap-fit member near the receiving area, so that the first housing is fixed by the two first snap-fit members.
[0020] Optionally, a plurality of first abutment members are fixedly connected to the outer wall of the first housing, and the ends of the first abutment members abut against the ends of the first snap-fit members, so as to prevent the first housing from rotating circumferentially along the tube by the first abutment members.
[0021] By adopting the above technical solution, in order to further improve the stability of the connection between the first housing and the two tubes, a first abutting member is provided on the outer wall of the first housing. The end of the first abutting member abuts against the end of the first snap-fit member so as to block the first housing from rotating around the tubes by the first abutting member, thereby improving the stability of the connection between the first housing and the tubes.
[0022] Optionally, it also includes a closure component, which includes a second housing, a third connector, and a sealing component. The second housing is sleeved on the outside of the third connector and is located within the receiving area. The outer peripheral wall of the second housing contacts the side wall of the first snap-fit component. Multiple sealing components are fixedly connected to the third connector. Each sealing component is correspondingly provided with a discharge port of the tube and is inserted into the discharge port of the tube.
[0023] By adopting the above technical solution, in order to protect the ointment or gel inside the tube when the tube body is not in use, a sealing component is set up. Each sealing component is inserted into the outlet of a tube body, and the sealing component seals the outlet of the tube body.
[0024] Optionally, a third snap-fit member is fixedly connected to the outer wall of the second housing. The third snap-fit member is inserted into the first snap-fit groove. A plurality of second abutments are fixedly connected to the outer wall of the second housing. The ends of the second abutments abut against the ends of the first snap-fit members, so as to block the second housing from rotating around the tube by the second abutments.
[0025] By adopting the above technical solution, in order to fix the second shell to the tube body, a third snap-fit member and a second abutment member are provided on the outer side wall of the second shell. The third snap-fit member is inserted into the first snap-fit groove, and the end of the second abutment member abuts against the end of the first snap-fit member, so that the second abutment member can block the second shell from rotating around the tube body, thereby ensuring that the second shell will not rotate around its own circumference.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, by setting multiple tubes and pushers, allows pastes or gels of different components to be placed in one tube. The pushers slide along the length of the tube, further driving the sliding seat to slide, thereby simultaneously extruding gels or pastes of different components from multiple tubes. This simplifies the operation and improves the accuracy of product proportioning. 2. By setting up a discharge assembly, multiple pushers drive multiple pastes of different components to be extruded through the discharge port via a sliding seat. The pastes further enter the second discharge pipe through the second connector from the first discharge pipe. The pastes or gels of different components are further mixed in the second discharge pipe before being extruded, which can improve the uniformity of mixing between pastes or gels of different components. 3. This application uses a sealing element, with each sealing element inserted into the outlet of a tube, to seal the outlet of the tube, so as to prevent bacteria or dust from contaminating the paste or gel when the tube is not in use. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the tube body in this application; Figure 2 This is a sectional view of the tube body of this application; Figure 3 This is a structural schematic diagram of the booster and the tube body of this application; Figure 4 This is a schematic diagram of the structure of the booster component in this application; Figure 5 This is a schematic diagram of the material discharge assembly of this application; Figure 6 This is a structural schematic diagram of the hybrid component of this application; Figure 7 This is a schematic diagram of the connection between the discharge assembly and the tube body in this application; Figure 8 This is a schematic diagram of the sealing component of this application; Figure 9 This is a schematic diagram of the connection between the sealing component and the pipe body in this application.
[0028] Explanation of reference numerals in the attached drawings: 1. Container body; 11. Pipe body; 111. Discharge port; 112. Push port; 113. First snap-fit component; 1131. First snap-fit groove; 114. Receiving area; 12. Sliding seat; 121. Positioning groove; 13. First mounting seat; 2. Pushing component; 21. First connecting component; 22. Positioning component; 3. Discharge assembly; 31. Second connecting component; 32. First discharge pipe; 321. Mixing component; 33. Second discharge pipe; 34. Third discharge pipe; 35. First shell; 351. First through hole; 352. Second snap-fit component; 353. First abutment component; 4. Sealing component; 41. Second shell; 411. Third snap-fit component; 412. Second abutment component; 42. Third connecting component; 43. Sealing component. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.
[0030] This application discloses a dual-tube booster. (Refer to...) Figure 1 and Figure 2 The dual-tube booster includes a container body 1, which includes at least two tubes 11 arranged in parallel. In this embodiment, there are two tubes 11, which are circular tubes, and the two tubes 11 are arranged side by side and fixedly connected to each other. One end of each tube 11 is a discharge port 111, and the other end is a push port 112. Each tube 11 has a sliding seat 12 inside, and the outer wall of the sliding seat 12 is in contact with the inner wall of the tube 11. The sliding seat 12 slides along the length of the tube 11. The tube is movably connected to the tube body 11. The inner cavity of the tube body 11 contains ointment or gel. The sliding seat 12 is pushed into the tube body 11 through the push port 112 to contact the ointment or gel. Since the ointment or gel has a certain viscosity, the sliding seat 12 will not fall off. The sliding seat 12 can slide along the length of the tube body 11 to further push the ointment in the tube body 11 to be extruded from the outlet 111. By setting two tube bodies 11, ointments or gels of different components can be extruded in the same proportion, which simplifies the operation process and improves the accuracy of medication.
[0031] Reference Figure 2 In order to place the tube body 11, the first mounting base 13 is fixedly sleeved on one end of the two tube bodies 11 near the push port 112.
[0032] Reference Figure 3 and Figure 4 To simultaneously extrude the paste or gel from both tubes 11, the dual-tube pusher includes multiple pushers 2. In this embodiment, two pushers 2 are correspondingly provided for each tube 11. The pushers 2 are parallel to the length of the tube 11, and the two pushers 2 are parallel and spaced apart. Adjacent pushers 2 are fixed together by a first connector 21 to create a gap between them. One end of each pusher 2 is located inside the tube 11 and slides along the length of the tube 11. One end of the pusher 2 abuts against the sliding seat 12. The pusher 2 enters the tube 11 through the push port 112 and further contacts the sliding seat 12, sliding along the length of the tube 11 to push the sliding seat 12. The sliding seat 12 further pushes the gel or paste out of the outlet 111. The two pushers 2 are used to extrude gels of different components from the two tubes 11.
[0033] Reference Figure 4Since there are two of each tube body 11 and pusher 2, in order to further enable each pusher 2 to be positioned on the corresponding sliding seat 12, a positioning member 22 is fixedly connected to one end of the pusher 2 near the sliding seat 12. The sliding seat 12 is provided with a positioning groove 121 along the length direction of the tube body 11 on the side near the push port 112 to accommodate the positioning member 22. When the positioning member 22 is located in the positioning groove 121 of the sliding seat 12, the pusher 2 is positioned with the corresponding sliding seat 12 so that the pusher 2 can push the sliding seat 12 to slide.
[0034] Reference Figure 5 When applying a dressing, it is generally necessary to mix ointments of different ingredients before application. To ensure that the gels extruded from the two tubes 11 are mixed to varying degrees, the dual-tube booster includes a dispensing assembly 3. The dispensing assembly 3 includes a second connector 31, a first dispensing tube 32, and multiple second dispensing tubes 33. The second connector 31 is hollow and has multiple second dispensing tubes 33 fixedly connected to it. Each second dispensing tube 33 corresponds to a dispensing port 111. In this embodiment, there are two second dispensing tubes 33. The inlet end of the second discharge pipe 33 is inserted into the outlet 111 of the pipe body 11. One end of the first discharge pipe 32 is fixedly connected to the side of the second connector 31 away from the second discharge pipe 33. The first discharge pipe 32 is arranged parallel to the length direction of the pipe body 11. When the two pushers 2 drive the two different pastes to be extruded from the outlet 111 through the sliding seat 12, the pastes further enter the first discharge pipe 32 through the second connector 31 from the second discharge pipe 33. The two pastes further enter the first discharge pipe 32, mix, and are then extruded.
[0035] Reference Figure 6 The two components of the paste enter the first discharge pipe 32. In order to further improve the uniformity of the mixing of the two components, a mixing element 321 is provided in the first discharge pipe 32. The mixing element 321 is parallel to the length direction of the first discharge pipe 32. In this embodiment, the mixing element 331 is in the shape of a spiral rod. The mixing element 331 improves the uniformity of the mixing of the two components.
[0036] Reference Figure 6 To further control the amount of extruded paste and reduce the occurrence of excessive extrusion, the discharge assembly 3 also includes a third discharge pipe 34. The inlet end of the third discharge pipe 34 is detachably connected to the outlet end of the first discharge pipe 32. Specifically, the inlet end of the third discharge pipe 34 is threadedly connected to the outlet end of the first discharge pipe 32 for easy disassembly, replacement or cleaning. The diameter of the third discharge pipe 34 is smaller than the diameter of the first discharge pipe 32, and the third discharge pipe 34 is inclined to guide the paste or gel through the inclined third discharge pipe 34 for easy extrusion.
[0037] Reference Figure 6In order to protect the first discharge pipe 32 and the second discharge pipe 33, the discharge assembly 3 also includes a first housing 35. The first housing 35 is sleeved on the outside of the second connector 31. A first through hole 351 is provided on the first housing 35 for the first discharge pipe 32 to pass through. The first housing 35 protects the first discharge pipe 32 and the second discharge pipe 33.
[0038] Reference Figure 6 and Figure 7 In order to fix the first housing 35 to the two tubes 11, a first snap-fit member 113 is fixedly connected to the side of the two tubes 11 that is far away from each other. A receiving area 114 for accommodating the first housing 35 is formed between the two first snap-fit members 113. One of the first snap-fit members 113 has a first snap-fit groove 1131 that extends through the tube 11 along the tube length direction. A second snap-fit member 352 is fixedly connected to the side wall of the first housing 35. The second snap-fit member 352 is inserted into the first snap-fit groove 1131. The outer side wall of the first housing 35 contacts the side of the first snap-fit member 113 that is close to the receiving area 114. The first housing 35 is fixed by the two first snap-fit members 113. In this embodiment, the first housing 35 has a circular cross-section.
[0039] Reference Figure 6 and Figure 7 In order to further improve the stability of the connection between the first housing 35 and the two tubes 11, a plurality of first abutment members 353 are fixedly connected to the outer wall of the first housing 35. The end of the first abutment member 353 abuts against the end of the first snap-fit member 113 so as to block the first housing 35 from rotating around the tubes 11. In this embodiment, two first abutment members 353 are provided along the circumferential direction of the first housing 35.
[0040] Reference Figure 8 and Figure 9 When the tube body 11 is not in use, in order to protect the ointment or gel inside the tube body 11, the dual-tube booster also includes a sealing member 4. The sealing member 4 includes a second shell 41, a third connector 42, and a sealing member 43. The second shell 41 is sleeved on the outside of the third connector 42. The second shell 41 is located in the receiving area 114. The outer peripheral wall of the second shell 41 contacts the side wall of the first snap-fit member 113. Multiple sealing members 43 are fixedly connected to the third connector 42. Each sealing member 43 is correspondingly provided to the outlet 111 of a tube body 11. In this embodiment, there are two sealing members 43. The second shell 41 has a circular cross-section. The sealing member 43 is inserted into the outlet 111 of the tube body 11 and the outlet 111 of the tube body 11 is sealed by the sealing member 43.
[0041] Reference Figure 9In order to fix the second housing 41 to the tube body 11, a third snap-fit member 411 is fixedly connected to the outer wall of the second housing 41. The third snap-fit member 411 is inserted into the first snap-fit groove 1131. A plurality of second abutment members 412 are fixedly connected to the outer wall of the second housing 41. In this embodiment, two second abutment members 412 are spaced apart along the circumference of the second housing 41. The end of the second abutment member 412 abuts against the end of the first snap-fit member 113 so as to block the rotation of the second housing 41 along the circumference of the tube body 11 by the second abutment member 412, thereby ensuring that the second housing 41 will not rotate along its own circumference.
[0042] The implementation principle of a dual-tube booster in this application embodiment is as follows: In use, the first housing 35 is placed in the receiving area 114 and fixed to the tube body 11. The booster 2 is inserted into the tube body 11 through the push port 112 and contacts the sliding seat 12. The booster 2 is slid along the tube length direction of the tube body 11, pushing the two sliding seats 12 to slide. Further, the paste or gel of different components in the two tube bodies 11 is pushed out from the discharge port 111. The two components of gel or paste enter the second discharge tube 33, the first connector 21 and the first discharge tube 32 in sequence. After being mixed by the mixing component 321 of the first discharge tube 32, it is squeezed out by the third discharge tube 34. When not in use, the second housing 41 is placed in the receiving area 114 and fixed to the tube 11 to seal the outlet 111 of the tube 11.
[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A dual-tube booster, characterized in that: It includes the container body (1) and the booster (2); The container body (1) includes at least two tubes (11), and multiple tubes (11) are arranged in parallel and side by side. Adjacent tubes (11) are fixedly connected. One end of each tube (11) is a discharge port (111), and the other end is a push port (112). Each of the tube bodies (11) is provided with a sliding seat (12), the outer wall of the sliding seat (12) is in contact with the inner wall of the tube body (11), and the sliding seat (12) is slidably connected to the tube body (11) along the tube length direction; The pusher (2) is provided in multiple ways. The pusher (2) is correspondingly arranged with the tube body (11). The pusher (2) slides parallel to the tube length direction of the tube body (11). The multiple pushers (2) are arranged parallel to each other and spaced apart. Two adjacent pushers (2) are fixed by a first connector (21) so that there is a gap between the two adjacent pushers (2). One end of each pusher (2) is located inside the tube body (11) and slides along the tube length direction of the tube body (11). One end of the pusher (2) abuts against the side of the sliding seat (12) near the push port (112).
2. A dual-tube booster according to claim 1, characterized in that: The booster (2) is fixedly connected to a positioning member (22) at one end near the sliding seat (12). The sliding seat (12) has a positioning groove (121) along the length of the tube (11) near the push port (112) to accommodate the positioning member (22).
3. A dual-tube booster according to claim 1, characterized in that: It also includes a discharge assembly (3), which includes a second connector (31), a first discharge pipe (32) and a plurality of second discharge pipes (33). The second connector (31) is hollow and a plurality of second discharge pipes (33) are fixedly connected to the second connector (31). Each second discharge pipe (33) is correspondingly provided with a discharge port (111). The inlet end of the second discharge pipe (33) is inserted into the discharge port (111) of the pipe body (11). The inlet end of the first discharge pipe (32) is fixedly connected to the side of the second connector (31) away from the second discharge pipe (33). The first discharge pipe (32) is arranged parallel to the length direction of the pipe body (11).
4. A dual-tube booster according to claim 3, characterized in that: The first discharge pipe (32) is provided with a mixing component (321), which is parallel to the length direction of the first discharge pipe (32).
5. A dual-tube booster according to claim 3, characterized in that: The discharge assembly (3) further includes a third discharge pipe (34), the inlet end of which is detachably connected to the outlet end of the first discharge pipe (32). The diameter of the third discharge pipe (34) is smaller than that of the first discharge pipe (32), and the third discharge pipe (34) is inclined.
6. A dual-tube booster according to claim 3, characterized in that: The discharge assembly (3) further includes a first housing (35), which is sleeved on the outside of the second connector (31), and a first through hole (351) is provided on the first housing (35) for the first discharge pipe (32) to pass through.
7. A dual-tube booster according to claim 6, characterized in that: On the multiple tubes (11) arranged side by side, a first snap-fit member (113) is fixedly connected to one side of two of the tubes (11) located at both ends. A receiving area (114) for accommodating the first housing (35) is formed between the two first snap-fit members (113). One of the first snap-fit members (113) has a first snap-fit groove (1131) extending through the tube length of the tube (11). A second snap-fit member (352) is fixedly connected to the side wall of the first housing (35). The second snap-fit member (352) is inserted into the first snap-fit groove (1131). The outer side wall of the first housing (35) contacts the side of the first snap-fit member (113) near the receiving area (114).
8. A dual-tube booster according to claim 7, characterized in that: The outer wall of the first housing (35) is fixedly connected with a plurality of first abutting members (353), the end of the first abutting member (353) abuts against the end of the first snap-fit member (113) so as to block the first housing (35) from rotating circumferentially along the tube (11) by the first abutting member (353).
9. A dual-tube booster according to claim 7, characterized in that: It also includes a closure (4), which includes a second housing (41), a third connector (42), and a sealing member (43). The second housing (41) is sleeved on the outside of the third connector (42). The second housing (41) is located in the receiving area (114). The outer peripheral wall of the second housing (41) is in contact with the side wall of the first snap-fit member (113). A plurality of sealing members (43) are fixedly connected to the third connector (42). Each sealing member (43) is correspondingly provided with a discharge port (111) of the tube body (11). The sealing member (43) is inserted into the discharge port (111) of the tube body (11).
10. A dual-tube booster according to claim 9, characterized in that: A third snap-fit member (411) is fixedly connected to the outer wall of the second housing (41). The third snap-fit member (411) is inserted into the first snap-fit groove (1131). A plurality of second abutments (412) are fixedly connected to the outer wall of the second housing (41). The end of the second abutment (412) abuts against the end of the first snap-fit member (113) so as to block the second housing (41) from rotating circumferentially along the tube (11) by the second abutment member (412).