Main body assembly and milk bottle brush
By employing a double- or multi-headed threaded connection design in the bottle brush, the problem of easy separation between the liquid bottle and the outer shell is solved, enabling reliable disassembly of the liquid bottle and preventing leakage of the cleaning liquid, thus improving the convenience and safety of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-04-07
AI Technical Summary
In existing bottle brushes, the way the liquid bottle is assembled with the outer shell can easily lead to accidental separation of the bottle body and the cap, causing leakage of cleaning liquid.
The design employs a first and second connector with double or multi-start threaded connections. The thread pitch between the bottle body and the bottle cap is smaller than the thread pitch between the second connector and the first connector, ensuring that the second connector loosens first during disassembly to prevent the bottle cap from separating from the bottle body.
It effectively prevents accidental separation of the bottle cap from the bottle body, avoids leakage of cleaning liquid, and ensures reliable disassembly and replacement of liquid bottles.
Smart Images
Figure CN224084859U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of maternal and infant products, in particular to a main body assembly and a feeding bottle brush. BACKGROUND
[0002] The existing manual pressing type feeding bottle brush is mainly divided into a brush head assembly and a main body assembly, wherein the brush head assembly comprises a hollow brush rod and a soft rubber brush head, the main body assembly comprises a shell, a connecting piece and a liquid bottle, the liquid bottle comprises a bottle body and a bottle cap, the liquid bottle is inserted into the shell, one end of the connecting piece is connected with the brush rod, and the other end is connected with the bottle body, the liquid bottle is pressed to outwardly deliver cleaning liquid, the cleaning liquid reaches the top area of the brush head through the connecting piece and the hollow brush rod, and the brush head is inserted into the feeding bottle and then rotated to clean the inside of the feeding bottle.
[0003] The assembly mode of the liquid bottle and the shell of the existing feeding bottle brush is generally fixed by thread rotation and cooperation with the shell, since the bottle cap and the bottle body are also fixed by thread rotation and cooperation, when the bottle body is reversed to take the liquid bottle, the bottle cap and the bottle body may be separated first, which causes the risk that the bottle cap and the connecting piece cannot be taken out from the main body assembly. SUMMARY
[0004] The main purpose of the utility model is to provide a main body assembly and a feeding bottle brush, which prevent the bottle body and the bottle cap of the liquid bottle from being separated by mistake and cause the leakage of cleaning liquid.
[0005] To achieve the above-mentioned purpose, the main body assembly provided by the utility model is used for installing a brush rod, and comprises a shell, a liquid bottle, a first connecting piece and a second connecting piece, the shell has a through accommodating cavity with two open ends, and a first opening is used for inserting the brush rod; the liquid bottle is movably inserted into the accommodating cavity through a second opening, the liquid bottle comprises a bottle body and a bottle cap, the inner peripheral edge of the bottle cap is threadedly connected with the outer peripheral wall of the bottle body; one end of the first connecting piece is connected with the cavity wall of the accommodating cavity; the second connecting piece is movably inserted into the bottle cap, one end of the second connecting piece is connected with the bottle body, and the other end is threadedly connected with the other end of the first connecting piece; the bottle body, the second connecting piece, the first connecting piece and the first opening are in communication; the thread pitch between the bottle body and the bottle cap is smaller than the thread pitch between the other end of the second connecting piece and the other end of the first connecting piece.
[0006] In an embodiment, the thread between the second connecting piece and the first connecting piece is a double-thread or a multi-thread.
[0007] In an embodiment, the surface of the first connecting piece facing the liquid bottle is provided with a convex rib, and the end of the convex rib abuts against the surface of the second connecting piece facing the first connecting piece.
[0008] In an embodiment, the number of the convex ribs is multiple, and the multiple convex ribs are distributed along the circumference of the surface of the first connecting member towards the liquid bottle.
[0009] In an embodiment, one of the outer circumferential wall of the second connecting member and the inner wall of the bottle cap is provided with a guide groove extending in the axial direction, and the other is provided with a guide post extending in the axial direction, and the guide post is slidingly connected in the guide groove.
[0010] In an embodiment, the first opening of the shell extends inwardly and recesses to form a connecting plate, the inner wall of the connecting plate is used to connect with the brush rod, and the outer wall of the connecting plate is insertedly connected with the inner wall of the first connecting member.
[0011] In an embodiment, the main body assembly further comprises a sealing member, the sealing member is arranged in the inner wall of the first connecting member, and the sealing member is a hollow structure.
[0012] In an embodiment, the sealing member comprises a sealing body and two sealing rings, the sealing body is through-penetrated at both ends, the two sealing rings are arranged on the outer wall of the sealing body in a spaced manner, and the inner wall of the first connecting member is convexly provided with a convex post along the circumference thereof.
[0013] When the brush rod is inserted into the shell, one end of the brush rod abuts against the first sealing ring on one surface of the convex post, and the other end of the second connecting member abuts against the second sealing ring on the other surface of the convex post.
[0014] In an embodiment, the two ends of the sealing body extend to form two extension parts, the two extension parts are each provided with a chamfer, and the two extension parts are respectively inserted into the brush rod and the second connecting member.
[0015] The utility model also provides a feeding bottle brush, the feeding bottle brush includes the main body assembly, the brush rod and the brush head as described above, one end of the brush rod is inserted into the shell and is detachably connected with the first opening, the brush head is sleeved on the other end of the brush rod, and the bottle body, the first connecting member, the second connecting member, the brush rod and the brush head are communicated.
[0016] The main body assembly provided by the technical scheme of the utility model comprises a shell and a liquid bottle, the shell and the liquid bottle are connected through a first connecting member and a second connecting member, the liquid bottle comprises a bottle body and a bottle cap, the bottle body is filled with cleaning liquid, the inner circumferences of the bottle cap are threadedly connected with the outer wall of the bottle body, one end of the second connecting member is connected with the bottle body, the second connecting member is movably arranged in the bottle cap, one end of the first connecting member is connected with the inner wall of the shell, and the other end of the first connecting member is threadedly connected with the other end of the second connecting member.
[0017] In use, the bottle body is pressed, the cleaning liquid flows into the brush rod and the brush head through the first opening via the second connecting piece and the first connecting piece, the brush head is inserted into the feeding bottle and then rotated to clean the inside of the feeding bottle. The thread pitch between the bottle body and the bottle cap is smaller than the thread pitch between the other end of the second connecting piece and the other end of the first connecting piece, that is, the friction between the bottle body and the bottle cap is greater than the friction between the second connecting piece and the first connecting piece, when the bottle body needs to be rotated and removed, the second connecting piece and the first connecting piece are first rotated and loosened, the liquid bottle and the second connecting piece are removed from the shell, and the cleaning liquid in the liquid bottle is replenished or replaced. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.
[0019] Figure 1 The structure schematic view of one embodiment of the feeding bottle brush provided by the present application is shown in the figure.
[0020] Figure 2 The cross-sectional schematic view of another embodiment of the feeding bottle brush provided by the present application is shown in the figure.
[0021] Figure 3 The Figure 2 The local enlarged view of A in the figure.
[0022] Figure 4 The exploded view of another embodiment of the feeding bottle brush provided by the present application is shown in the figure.
[0023] Figure 5 The structure schematic view of one embodiment of the first connecting piece, the second connecting piece and the bottle cap in the feeding bottle brush provided by the present application is shown in the figure.
[0024] Explanation of reference numerals:
[0025] 100, feeding bottle brush; 10, main body assembly; 1, shell; 11, containing cavity; 12, first opening; 121, connecting plate; 13, second opening; 2, liquid bottle; 21, bottle body; 22, bottle cap; 3, first connecting piece; 31, convex rib; 32, boss; 4, second connecting piece; 41, guide groove; 5, sealing element; 51, first sealing ring; 52, second sealing ring; 53, extension; 20, brush rod; 30, brush head.
[0026] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0028] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0029] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.
[0030] The existing manual pressing type milk bottle brush is mainly divided into a brush head assembly and a main body assembly, wherein the brush head assembly includes a hollow brush rod and a soft rubber brush head, the main body assembly includes a shell, a connecting piece and a liquid bottle, the liquid bottle includes a bottle body and a bottle cap, the liquid bottle penetrates into the shell, one end of the connecting piece is connected with the brush rod, and the other end is connected with the bottle body. The cleaning liquid is transported outward by pressing the liquid bottle, and the cleaning liquid reaches the top area of the brush head through the connecting piece and the hollow brush rod. The brush head is inserted into the milk bottle and rotated to clean the inside of the milk bottle.
[0031] The assembly mode of the liquid bottle and the shell of the existing milk bottle brush is generally fixed by screwing and rotating with the shell. Since the bottle cap and the bottle body are also fixed by screwing and rotating, when the bottle body is reversed to take the liquid bottle, the bottle body and the bottle cap may be separated first, which may cause the risk that the bottle cap and the connecting piece cannot be taken out from the main body assembly.
[0032] The utility model provides a main part assembly and feeding bottle brush, aims at preventing the bottle body and the bottle cap of liquid bottle from separating by misoperation, causes the leakage of cleaning liquid.
[0033] Please refer to Figures 1 to 5 In the embodiment of the utility model, the main part assembly 10 is used for installing the brush rod 20, and the main part assembly 10 comprises a shell 1, a liquid bottle 2, a first connecting piece 3 and a second connecting piece 4, the shell 1 has a containing cavity 11 with two open ends and through, and the first opening 12 is used for passing the brush rod 20, the liquid bottle 2 is movably passed in the containing cavity 11 through the second opening 13, the liquid bottle 2 comprises a bottle body 21 and a bottle cap 22, the inner peripheral edge of the bottle cap 22 is threadedly connected with the outer peripheral wall of the bottle body 21, one end of the first connecting piece 3 is connected with the cavity wall of the containing cavity 11, the second connecting piece 4 is movably passed in the bottle cap 22, one end of the second connecting piece 4 is connected with the bottle body 21, and the other end is threadedly connected with the other end of the first connecting piece 3, the bottle body 21, the second connecting piece 4 and the first connecting piece 3 are communicated with the first opening 12, and the thread pitch between the bottle body 21 and the bottle cap 22 is less than the thread pitch between the other end of the second connecting piece 4 and the other end of the first connecting piece 3.
[0034] In the embodiment, the main part assembly 10 is made of hard plastic material, is light and durable, is not easy to rust, and can also be made of light metal material, such as aluminum alloy. One end of the first connecting piece 3 is connected with the shell 1, and the specific connection mode can be plug-in connection, ultrasonic fixation or other connection modes. In a preferred embodiment, the liquid bottle 2 is a common liquid bottle 2 with a pump body on the market, which can press the pump body to extrude foam, the second connecting piece 4 is connected with the pump body and slidably connected with the inner wall of the bottle cap 22, and the effect of preventing the second connecting piece 4 from being deflected is achieved.
[0035] The technical scheme of the utility model discloses a main part assembly 10 comprising a shell 1 and a liquid bottle 2, the shell 1 and the liquid bottle 2 are connected through a first connecting piece 3 and a second connecting piece 4, the liquid bottle 2 comprises a bottle body 21 and a bottle cap 22, the bottle body 21 is filled with cleaning liquid, the inner peripheral edge of the bottle cap 22 is threadedly connected with the outer wall of the bottle body 21, one end of the second connecting piece 4 is connected with the bottle body 21, the second connecting piece 4 is movably passed in the bottle cap 22, one end of the first connecting piece 3 is connected with the inner wall of the shell 1, and the other end of the first connecting piece 3 is threadedly connected with the other end of the second connecting piece 4.
[0036] In use, the bottle 21 is pressed, the cleaning liquid flows into the brush rod 20 and the brush head 30 through the first opening 12 via the second connecting piece 4 and the first connecting piece 3, the brush head 30 is inserted into the milk bottle, and the milk bottle is cleaned by rotating the brush head 30. The thread pitch between the bottle 21 and the cap 22 is smaller than the thread pitch between the other end of the second connecting piece 4 and the other end of the first connecting piece 3, that is, the friction between the bottle 21 and the cap 22 is greater than the friction between the second connecting piece 4 and the first connecting piece 3, when the bottle 21 needs to be rotated and removed, the second connecting piece 4 and the first connecting piece 3 are first loosened, the liquid bottle 2 and the second connecting piece 4 are removed from the shell 1, the cleaning liquid in the liquid bottle 2 is supplemented or replaced, and the problems that the bottle 21 and the cap 22 are first loosened, the cap 22 and the second connecting piece 4 cannot be taken out, and the cleaning liquid in the bottle 21 is poured are prevented.
[0037] In the embodiment of the utility model, the thread between the second connecting piece 4 and the first connecting piece 3 is double thread or multi-thread.
[0038] In the embodiment, in order to further reduce the friction between the second connecting piece 4 and the first connecting piece 3, the thread between the second connecting piece 4 and the first connecting piece 3 adopts double thread or multi-thread, the second connecting piece 4 and the first connecting piece 3 are further loosened first, the problems that the bottle 21 and the cap 22 are first loosened, the cap 22 and the second connecting piece 4 cannot be taken out, and the cleaning liquid in the bottle 21 is poured are prevented.
[0039] In the embodiment of the utility model, the surface of the first connecting piece 3 towards the liquid bottle 2 is provided with a convex rib 31, and the end of the convex rib 31 abuts against the surface of the second connecting piece 4 towards the first connecting piece 3.
[0040] In the embodiment, the surface of the first connecting piece 3 towards the liquid bottle 2 is provided with a convex rib 31, when the second connecting piece 4 and the first connecting piece 3 are threadedly connected, the convex rib 31 abuts against the surface of the second connecting piece 4 towards the first connecting piece 3, the surface contact between the second connecting piece 4 and the first connecting piece 3 is converted into point contact between the convex rib 31 and the second connecting piece 4, the friction between the second connecting piece 4 and the first connecting piece 3 is further reduced, the problems that the bottle 21 and the cap 22 are first loosened, the cap 22 and the second connecting piece 4 cannot be taken out, and the cleaning liquid in the bottle 21 is poured are prevented. The convex rib 31 can also control the displacement distance of the cap 22 and the bottle 21, prevent the bottle 21 and the cap 22 from being pressed too deep, and cause the liquid bottle 2 to be damaged and unable to return to the original position.
[0041] In the embodiment of the utility model, the number of the convex ribs 31 is multiple, and the multiple convex ribs 31 are distributed along the circumference of the surface of the first connecting piece 3 towards the liquid bottle 2.
[0042] In the embodiment, the plurality of convex ribs 31 are distributed along the circumference of the first connecting piece 3, and when the second connecting piece 4 is threadedly connected with the first connecting piece 3, the plurality of convex ribs 31 abut against the surface of the second connecting piece 4 facing the first connecting piece 3, so that the balance of the first connecting piece 3 and the second connecting piece 4 after being screwed is ensured through multi-point contact.
[0043] In the embodiment of the utility model, one of the outer circumferential wall of the second connecting piece 4 and the inner wall of the bottle cap 22 is provided with an axial direction extending guide groove 41, and the other is provided with an axial direction extending guide column which is slidingly connected in the guide groove 41.
[0044] In the embodiment, the second connecting piece 4 can make axial relative movement with respect to the bottle cap 22, one of the outer circumferential wall of the second connecting piece 4 and the inner wall of the bottle cap 22 is provided with an axial direction extending guide groove 41, and the other is provided with a guide column parallel to the guide groove 41, the guide column can slide along the extension direction of the guide groove 41, so that the second connecting piece 4 can slide with respect to the bottle cap 22, and the effect of limiting the sliding direction of the second connecting piece 4 is achieved, and the deflection is prevented. And the cooperation of the guide column and the guide groove 41 can also limit the effect in the circumferential direction, preventing the second connecting piece 4 from rotating with respect to the bottle cap 22. It can be understood that in a preferred embodiment, the number of guide grooves 41 and guide columns is multiple, and the plurality of guide grooves 41 or the plurality of guide columns are uniformly arranged along the circumferential direction of the second connecting piece 4, and a guide column is slidingly connected in a guide groove 41.
[0045] In the embodiment of the utility model, the first opening 12 of the shell 1 extends inwardly to form a connecting plate 121, the inner wall of the connecting plate 121 is used for connecting with the brush rod 20, and the outer wall of the connecting plate 121 is insertedly connected with the inner wall of the first connecting piece 3.
[0046] In the embodiment, the first opening 12 of the shell 1 extends inwardly to form a connecting plate 121, the inner wall of the connecting plate 121 is used for connecting with the brush rod 20, and the outer wall of the connecting plate 121 is insertedly connected with the inner wall of the first connecting piece 3.
[0047] In the embodiment of the utility model, the main body assembly 10 further comprises a sealing piece 5, the sealing piece 5 is sealingly arranged in the inner wall of the first connecting piece 3, and the sealing piece 5 is a hollow structure.
[0048] In this embodiment, the main component 10 also includes a sealing member 5 disposed in the inner wall of the first connector 3. The sealing member 5 is also a hollow structure. The sealing member 5 is used to seal the connection between the first connector 3 and the second connector 4 and the connection between the first connector 3 and the brush rod 20, so that the cleaning foam can only enter the brush rod 20 through the middle upwards, instead of entering the outer shell 1 through the gap, which would cause waste of cleaning foam and insufficient cleaning foam on the brush rod 20 and the brush head 30.
[0049] In an embodiment of this utility model, the sealing element 5 includes a sealing body and two sealing rings. The two ends of the sealing body are through, and the two sealing rings are spaced apart on the outer wall of the sealing body. The inner wall of the first connecting element 3 is provided with a boss 32 along its circumference.
[0050] When the brush rod 20 is inserted into the housing 1, one end of the brush rod 20 abuts against the first sealing ring 51 on one surface of the boss 32, and the other end of the second connector 4 abuts against the second sealing ring 52 on the other surface of the boss 32.
[0051] In this embodiment, the sealing element 5 includes a sealing body extending through both ends and two sealing rings spaced apart on the outer peripheral wall of the sealing body. A boss 32 protrudes from the inner wall of the first connecting member 3. The first sealing ring 51 is located on the surface of the boss 32 facing the first opening 12, and the second sealing ring 52 is located on the surface of the boss 32 facing the second opening 13. When the brush rod 20 is inserted and installed in the first opening 12, the end of the brush rod 20 abuts against the first sealing ring 51 on the boss 32 to seal the gap between the brush rod 20 and the first connecting member 3. When the second connecting member 4 is threadedly connected to the first connecting member 3, the end of the second connecting member 4 abuts against the second sealing ring 52 on the boss 32 to seal the gap between the second connecting member 4 and the first connecting member 3. This prevents cleaning foam from entering the outer casing 1 through the gap, thus avoiding waste of cleaning foam and insufficient cleaning foam on the brush rod 20 and brush head 30.
[0052] In an embodiment of this utility model, the two ends of the sealing body extend to form extension portions 53, both extension portions 53 are provided with chamfers, and the two extension portions 53 are respectively inserted into the brush rod 20 and the second connector 4.
[0053] In this embodiment, both ends of the sealing body extend to form extension portions 53. One extension portion 53 is inserted into the brush rod 20, and the other extension portion 53 is inserted into the second connector 4, resulting in a stable connection and improved sealing performance. Both extension portions 53 are provided with chamfers to facilitate insertion and connection, making it easy for the extension portion 53 to be inserted into the brush rod 20 or the second connector 4.
[0054] Please see Figure 1 , Figure 2 and Figure 4This utility model also proposes a baby bottle brush 100, which includes the main body component 10, brush rod 20 and brush head 30 as described above. One end of the brush rod 20 is inserted into the outer shell 1 and detachably connected to the first opening 12. The brush head 30 is sleeved on the other end of the brush rod 20. The bottle body 21, the first connector 3, the second connector 4, the brush rod 20 and the brush head 30 are connected.
[0055] In this embodiment, one end of the brush rod 20 is inserted into the outer shell 1 and detachably connected to the first opening 12. The detachable connection can be a plug-in connection or a combination of a snap fastener and a rotating groove, allowing the brush rod 20 and the outer shell 1 to be rotated and fastened together. The brush head 30 is fitted onto the other end of the brush rod 20. The bottle body 21, the first connector 3, the second connector 4, the brush rod 20, and the brush head 30 are connected. The cleaning liquid inside the bottle body 21 enters the brush rod 20 through the second connector 4 and the first connector 3, and is squeezed out from the brush head 30. After the brush head 30 is inserted into the bottle, rotating the brush head 30 cleans the inside of the bottle.
[0056] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A main body assembly for mounting a brush rod, characterized in that, The main components include: The outer casing has a through-cavity with openings at both ends, the first opening being for inserting the brush rod; A liquid bottle, which is movably inserted into the receiving cavity through a second opening, the liquid bottle includes a bottle body and a bottle cap, the inner circumferential edge of the bottle cap being threadedly connected to the outer circumferential wall of the bottle body; A first connector, one end of which is connected to the cavity wall of the receiving cavity; and A second connector is movably inserted through the bottle cap. One end of the second connector is connected to the bottle body, and the other end is threadedly connected to the other end of the first connector. The bottle body, the second connector, the first connector, and the first opening are in communication. The thread pitch between the bottle body and the bottle cap is less than the thread pitch between the other end of the second connector and the other end of the first connector.
2. The main component as described in claim 1, characterized in that, The thread between the second connector and the first connector is a double-start thread or a multi-start thread.
3. The main component as described in claim 1, characterized in that, The first connector has a rib on its surface facing the liquid bottle, and the end of the rib abuts against the surface of the second connector facing the first connector.
4. The main component as described in claim 3, characterized in that, The number of the protruding ribs is multiple, and the multiple protruding ribs are distributed circumferentially at intervals along the surface of the first connector toward the liquid bottle.
5. The main component as described in any one of claims 1 to 4, characterized in that, One of the outer peripheral wall of the second connector and the inner wall of the bottle cap is provided with an axially extending guide groove, and the other is provided with an axially extending guide post, the guide post being slidably connected in the guide groove.
6. The main component as described in any one of claims 1 to 4, characterized in that, The first opening of the outer shell extends inward to form a connecting plate, the inner wall of the connecting plate is used to connect with the brush rod, and the outer wall of the connecting plate is inserted into the inner wall of the first connector.
7. The main component as described in claim 6, characterized in that, The main component also includes a sealing element, which is sealed to the inner wall of the first connector and has a hollow structure.
8. The main component as described in claim 7, characterized in that, The sealing element includes a sealing body and two sealing rings. The sealing body is through at both ends, and the two sealing rings are spaced apart on the outer wall of the sealing body. The inner wall of the first connector is provided with a boss along its circumference. When the brush rod is inserted into the housing, one end of the brush rod abuts against the first sealing ring on one surface of the boss, and the other end of the second connector abuts against the second sealing ring on the other surface of the boss.
9. The main component as described in claim 8, characterized in that, The sealing body has extensions at both ends, each extension having a chamfer, and the two extensions are respectively inserted into the brush rod and the second connector.
10. A bottle brush, characterized in that, The bottle brush includes a main body assembly, a brush rod, and a brush head as described in any one of claims 1 to 9. One end of the brush rod is inserted into the housing and detachably connected to the first opening. The brush head is sleeved on the other end of the brush rod. The bottle body, the first connector, the second connector, the brush rod, and the brush head are in communication.