Telescopic cleaning brush

Abstract

The utility model provides a telescopic cleaning brush, which belongs to the technical field of test tube cleaning, and comprises a primary support body, a first connecting part, a secondary support body, two second connecting parts and a first sliding part, first bristles are arranged on the outer wall of the first-stage supporting body, a first mounting hole channel is formed in the first-stage supporting body, and the first connecting part is arranged on the first-stage supporting body. The second-stage supporting body is mounted in the first mounting hole channel, and second bristles are arranged on the outer wall of the second-stage supporting body; the second connecting parts are arranged on the secondary supporting body at intervals; the second connecting part is connected with the first connecting part; and the first sliding part is arranged on the second-stage supporting body and is in sliding connection with the first mounting hole channel. According to the telescopic cleaning brush provided by the utility model, the secondary supporting body is arranged in the primary supporting body, and the secondary supporting body can penetrate out or be recycled in the primary supporting body through the connection of the first connecting part and the two second connecting parts, so that a variable-diameter test tube can be conveniently and quickly cleaned.

Description

Technical Field

[0001] The utility model belongs to the technical field of test tube cleaning, and more specifically, relates to a telescopic cleaning brush. Background Art

[0002] During the inspection operation, in order to meet the inspection requirements, it is necessary to ensure that the test tubes are clean and hygienic. Therefore, the cleaning work of the test tubes is particularly important. When cleaning the test tubes, the staff often use a brush to reach into the inside of the test tubes for brushing. However, since some test tubes have a variable diameter structure, when cleaning this type of test tube, multiple different brushes are required to complete the brushing work, resulting in poor convenience of the cleaning work. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a telescopic cleaning brush to solve the technical problem of poor operational convenience in the prior art of using multiple brushes to clean variable-diameter test tubes.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: providing a telescopic cleaning brush, including:

[0005] A primary support body, with a circumferentially arranged first brush bristles on the lower side of the outer wall, and a through first mounting hole channel inside;

[0006] A first connection part, installed on the primary support body and arranged near the upper port of the first mounting hole channel;

[0007] A secondary support body, installed in the first mounting hole channel and protruding above the primary support body at the upper end; a circumferentially arranged second brush bristles are provided on the lower side of the outer wall of the secondary support body;

[0008] Two second connection parts, both provided on the outer wall of the secondary support body; the two second connection parts are located above the second brush bristles and are spaced apart; the second connection part is connected to the first connection part and is used to fix the secondary support body to penetrate or retract into the first mounting hole channel;

[0009] A first sliding part, provided on the outer wall of the secondary support body and located between the two second connection parts; the first sliding part is slidably connected to the first mounting hole channel.

[0010] In a possible implementation manner, the primary support body and the secondary support body are coaxially arranged, and the length of the secondary support body is greater than the length of the primary support body; a ring-shaped accommodation groove for accommodating the second brush bristles is provided on the lower side of the inner wall of the first mounting hole channel.

[0011] In a possible implementation, a limiting boss is provided on the outer wall of the secondary support body, and an annular limiting groove for mating installation with the limiting boss is provided on the inner wall of the first installation hole; the depth of the annular limiting groove is less than the depth of the annular accommodating groove, and the annular limiting groove is located above the annular accommodating groove; the second connecting portion is located above the limiting boss.

[0012] In a possible implementation, an operation protruding portion is provided at the upper end of the secondary support body.

[0013] In a possible implementation, a through second installation hole is provided on the secondary support body, and a third connecting portion is provided at the upper port of the second installation hole; the retractable cleaning brush further includes:

[0014] A tertiary support body, installed in the second installation hole and protruding above the secondary support body at the upper end; an annularly arranged third brush is provided on the lower side of the outer wall of the tertiary support body;

[0015] Fourth connecting portions, two in number, are both provided on the outer wall of the tertiary support body; the two fourth connecting portions are located above the third brush and are spaced apart; the third connecting portion is connected to the fourth connecting portion and is used to fix the tertiary support body to penetrate or retract into the second installation hole;

[0016] A second sliding portion is provided on the outer wall of the tertiary support body and is located between the two fourth connecting portions; the second sliding portion is slidably connected to the second installation hole.

[0017] In a possible implementation, the secondary support body and the tertiary support body are coaxially arranged, and the length of the tertiary support body is greater than the length of the secondary support body; an annular accommodating groove for accommodating the third brush is provided on the lower side of the inner wall of the second installation hole.

[0018] In a possible implementation, a limiting boss is provided on the outer wall of the tertiary support body, and an annular limiting groove for mating installation with the limiting boss is provided on the inner wall of the second installation hole; the depth of the annular limiting groove is less than the depth of the annular accommodating groove, and the annular limiting groove is located above the annular accommodating groove; the fourth connecting portion is located above the limiting boss.

[0019] In a possible implementation, both the first connecting portion and the third connecting portion are internal thread segments, and both the second connecting portion and the fourth connecting portion are external thread segments for mating installation with the internal thread segments; the radial dimension of the first sliding portion is less than the radial dimension of the first installation hole, and the radial dimension of the second sliding portion is less than the radial dimension of the second installation hole.

[0020] In a possible implementation, both the first connecting portion and the third connecting portion include a plurality of spring plungers, and both the second connecting portion and the fourth connecting portion are annular grooves that are fitted and installed with the balls of the spring plungers; the radial dimension of the first sliding portion is smaller than the radial dimension of the first installation hole, and the radial dimension of the second sliding portion is smaller than the radial dimension of the second installation hole.

[0021] In a possible implementation, the primary support body, the secondary support body, and the tertiary support body are all cylindrical structures. A water injection hole is provided through the tertiary support body, and a plug for detachably connecting and closing the water injection hole is provided at the upper end of the tertiary support body.

[0022] The beneficial effects of the retractable cleaning brush provided by the present utility model are as follows: Compared with the prior art, for the retractable cleaning brush of the present utility model, before use, a through first installation hole is opened on the primary support body, and at the same time, the first connecting portion is installed on the upper side of the inner wall of the first installation hole; prepare the secondary support body, and install the second brush bristles, two second connecting portions, and the first sliding portion on the secondary support body. During installation, the secondary support body is inserted into the first installation hole from bottom to top, and the second brush bristles are located in the second installation hole. The upper second connecting portion and the second sliding portion pass through the upper orifice of the first installation hole, and the lower second connecting portion is connected to the first connecting portion, realizing the connection between the secondary support body and the primary support body. At this time, the second brush bristles are located inside the first installation hole, and the staff can directly use the first brush bristles on the primary support body to clean the inner wall of a test tube with a corresponding size. When it is necessary to clean a test tube with a size corresponding to the second brush bristles, the staff manipulates the secondary support body to move downward in the first installation hole of the primary support body. The lower second connecting portion is separated from the first connecting portion, and the first sliding portion quickly passes through the first connecting portion so that the second brush bristles penetrate out of the first installation hole, and the upper second connecting portion is connected to the first connecting portion. Then, the staff can use the second brush bristles to clean the test tube with a corresponding size. In this way, the secondary support body with the second brush bristles is installed inside the primary support body with the first brush bristles, and the penetration or recovery of the secondary support body in the primary support body is realized through the connection of the first connecting portion and the two second connecting portions, so that the variable-diameter test tube can be cleaned conveniently and quickly. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the retractable cleaning brush provided by an embodiment of the present utility model;

[0025] Figure 2 Cross-sectional view of the retractable cleaning brush provided by an embodiment of the present utility model;

[0026] Figure 3 Half-sectional view of the primary support body provided by an embodiment of the present utility model;

[0027] Figure 4 Half-sectional view of the secondary support body provided by an embodiment of the present utility model;

[0028] Figure 5 Half-sectional view of the tertiary support body provided by an embodiment of the present utility model;

[0029] Figure 6 Schematic diagram of the usage state of the retractable cleaning brush provided by an embodiment of the present utility model;

[0030] Figure 7 Schematic connection diagram of the spring plunger and the annular card slot provided by an embodiment of the present utility model.

[0031] Among them, each reference numeral in the figure:

[0032] 1, primary support body; 11, first bristles; 12, first mounting hole channel; 13, annular accommodation groove; 14, annular limiting groove; 2, first connection part; 21, spring plunger; 3, secondary support body; 31, second bristles; 32, limiting boss; 33, operation protruding part; 34, second mounting hole channel; 35, third connection part; 4, second connection part; 41, annular card slot; 5, first sliding part; 6, tertiary support body; 61, third bristles; 62, water injection hole; 63, plug; 7, fourth connection part; 8, second sliding part. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0037] Please refer to Figures 1 to 6 , and now the retractable cleaning brush provided by the present invention will be described. A retractable cleaning brush includes a primary support body 1, a first connecting portion 2, a secondary support body 3, a second connecting portion 4 and a first sliding portion 5; a first brush 11 is annularly arranged on the lower side of the outer wall of the primary support body 1, and a through first mounting hole 12 is provided inside; the first connecting portion 2 is mounted on the primary support body 1 and is disposed near the upper port of the first mounting hole 12; the secondary support body 3 is mounted in the first mounting hole 12 and its upper end protrudes above the primary support body 1; a second brush 31 is annularly arranged on the lower side of the outer wall of the secondary support body 3; the number of the second connecting portions 4 is two, and they are both disposed on the outer wall of the secondary support body 3; the two second connecting portions 4 are located above the second brush 31 and are spaced apart; the second connecting portion 4 is connected to the first connecting portion 2 and is used for fixing the secondary support body 3 to penetrate or retract into the first mounting hole 12; the first sliding portion 5 is disposed on the outer wall of the secondary support body 3 and is located between the two second connecting portions 4; the first sliding portion 5 is slidably connected to the first mounting hole 12.

[0038] The retractable cleaning brush provided by the present utility model, compared with the prior art, before use, a through first installation hole 12 is opened on the first support body 1, and a first connection part 2 is installed on the upper side of the inner wall of the first installation hole 12; prepare the second support body 3, and install second bristles 31, two second connection parts 4, and a first sliding part 5 on the second support body 3. During installation, the second support body 3 is inserted into the first installation hole 12 from bottom to top, and the second bristles 31 are located in the second installation hole 34. The upper second connection part 4 and the second sliding part 8 pass through the upper orifice of the first installation hole 12, and the lower second connection part 4 is connected to the first connection part 2, realizing the connection between the second support body 3 and the first support body 1. At this time, the second bristles 31 are located inside the first installation hole 12, and the staff can directly use the first bristles 11 on the first support body 1 to clean the inner wall of the test tube with the corresponding size. When it is necessary to clean the test tube with the corresponding size of the second bristles 31, the staff manipulates the second support body 3 to move downward in the first installation hole 12 of the first support body 1. The lower second connection part 4 is separated from the first connection part 2, and the first sliding part 5 quickly passes through the first connection part 2, so that the second bristles 31 penetrate out of the first installation hole 12, and the upper second connection part 4 is connected to the first connection part 2. Then, the staff can use the second bristles 31 to clean the test tube with the corresponding size. In this way, the second support body 3 with the second bristles 31 is installed inside the first support body 1 with the first bristles 11, and the penetration or recovery of the second support body 3 in the first support body 1 is realized through the connection of the first connection part 2 and the two second connection parts 4, so that the variable-diameter test tube can be cleaned conveniently and quickly.

[0039] Please refer to Figures 1 to 6 , as a specific implementation manner of the retractable cleaning brush provided by the present utility model, the first support body 1 and the second support body 3 are coaxially arranged, and the length of the second support body 3 is greater than the length of the first support body 1; a ring-shaped accommodating groove 13 for accommodating the second bristles 31 is provided on the lower side of the inner wall of the first installation hole 12; a ring-shaped accommodating groove 13 is opened on the lower side of the inner wall of the first installation hole 12, and the second support body 3 is inserted into the first installation hole 12 from bottom to top. The second bristles 31 on the outer side surface of the second support body 3 are located in the ring-shaped accommodating groove 13, and its upper end penetrates out of the first installation hole 12. At the same time, the second connection part 4 on the lower side of the second support body 3 is connected to the first connection part 2 inside the first installation hole 12. With the help of the ring-shaped accommodating groove 13, the second bristles 31 are installed in cooperation, and the second support body 3 is installed in cooperation with the inner wall of the first installation hole 12. With the help of the second support body 3 protruding above the first support body 1, the second support body 3 can be conveniently and effectively manipulated to change its position, so as to control the second bristles 31 to penetrate out of the first installation hole 12 or be retracted into the first installation hole 12.

[0040] Please refer to Figures 1 to 6, as a specific embodiment of the retractable cleaning brush provided by the present utility model, a limiting boss 32 is provided on the outer wall of the secondary support body 3, and an annular limiting groove 14 for mating installation with the limiting boss 32 is provided on the inner wall of the first installation hole 12; the depth of the annular limiting groove 14 is less than the depth of the annular accommodating groove 13, and the annular limiting groove 14 is located above the annular accommodating groove 13; the second connecting portion 4 is located above the limiting boss 32; further, the annular limiting groove 14 is installed in the first installation hole 12, and the annular limiting groove 14 is located between the annular accommodating groove 13 and the first connecting portion 2, and the upper and lower ends of the annular limiting groove 14 are connected to the first connecting portion 2 and the annular accommodating groove 13; at the same time, the limiting boss 32 is provided on the outer wall of the secondary support body 3. During the installation of the secondary support body 3 in the first installation hole 12, the second connecting portion 4 is connected to the first connecting portion 2, the limiting boss 32 is installed in the annular limiting groove 14, and the second brush hair 31 is installed in the annular accommodating groove 13. In this way, the limiting of the secondary support body 3 is realized, so that the installation position of the secondary support body 3 is accurate.

[0041] Please refer to Figure 1 , Figure 2 and Figure 4 , as a specific embodiment of the retractable cleaning brush provided by the present utility model, an operation protrusion 33 is provided at the upper end of the secondary support body 3; the upper end of the secondary support body 3 moves upward to above the primary support body 1. Therefore, an operation protrusion 33 extending radially outward is installed at the upper end of the secondary support body 3, and the staff can reliably and quickly control the movement of the secondary support body 3 in the first installation hole 12 through the operation protrusion 33; at the same time, the secondary support body 3 is also limited by means of the operation protrusion 33. A knurled structure is processed on the outer side surface of the operation protrusion 33.

[0042] Please refer to Figures 1 to 6, as a specific embodiment of the retractable cleaning brush provided by the present utility model, a through second installation hole 34 is provided on the secondary support 3, and a third connection part 35 is provided at the upper port of the second installation hole 34; the retractable cleaning brush further includes a tertiary support 6, a fourth connection part 7 and a second sliding part 8, the tertiary support 6 is installed in the second installation hole 34, and the upper end protrudes above the secondary support 3; a circumferentially arranged third brush hair 61 is provided on the lower side of the outer wall of the tertiary support 6; the number of the fourth connection parts 7 is two, and both are provided on the outer wall of the tertiary support 6; the two fourth connection parts 7 are located above the third brush hair 61 and are arranged at intervals; the third connection part 35 is connected to the fourth connection part 7 and is used to fix the tertiary support 6 to penetrate or retract into the second installation hole 34; the second sliding part 8 is provided on the outer wall of the tertiary support 6 and is located between the two fourth connection parts 7; the second sliding part 8 is slidably connected to the second installation hole 34; a through second installation hole 34 is opened on the secondary support 3, and the third connection part 35 is installed on the upper side of the inner wall of the second installation hole 34; prepare the tertiary support 6, and install the third brush hair 61, two fourth connection parts 7 and a second sliding part 8 on the tertiary support 6. During installation, the tertiary support 6 is inserted into the second installation hole 34 from bottom to top, and the second brush hair 31 is located in the second installation hole 34. The upper fourth connection part 7 and the second sliding part 8 pass through the upper hole of the second installation hole 34, and the lower fourth connection part 7 is connected to the third connection part 35, realizing the connection between the tertiary support 6 and the secondary support 3. During use, the tertiary support 6 is controlled to move downward, the lower fourth connection part 7 is separated from the third connection part 35, the second sliding part 8 passes through the third connection part 35, and finally the upper fourth connection part 7 is connected to the third connection part 35. When the tertiary support 6 is connected to the secondary support 3, the third brush hair 61 is located below the primary support 1 and the secondary support 3, so as to use the third brush hair 61 to clean the test tube. With the help of the second sliding part 8, the movement of the tertiary support 6 is faster, and due to the vertically arranged fourth connection parts 7, when the third brush hair 61 on the tertiary support 6 is in the working state or the non-working state, the two fourth connection parts 7 are respectively connected to the third connection part 35.

[0043] Please refer to Figures 1 to 6, as a specific embodiment of the retractable cleaning brush provided by the present utility model, the secondary support body 3 and the tertiary support body 6 are coaxially arranged, and the length of the tertiary support body 6 is greater than that of the secondary support body 3; a ring-shaped accommodation groove 13 for accommodating the third bristles 61 is provided on the lower side of the inner wall of the second installation hole 34; a ring-shaped accommodation groove 13 is opened on the lower side of the inner wall of the second installation hole 34, the tertiary support body 6 is inserted into the second installation hole 34 from bottom to top, the third bristles 61 on the outer side of the tertiary support body 6 are located in the ring-shaped accommodation groove 13, and its upper end passes through the second installation hole 34. At the same time, the third connection part 35 on the lower side of the tertiary support body 6 is connected to the third connection part 35 in the second installation hole 34. With the help of the ring-shaped accommodation groove 13, the third bristles 61 are cooperatively installed, and the tertiary support body 6 is cooperatively installed with the inner wall of the second installation hole 34. With the help of the tertiary support body 6 protruding above the secondary support body 3, the tertiary support body 6 can be conveniently and effectively manipulated to change its position, so as to control the third bristles 61 to pass through the second installation hole 34 or be retracted into the second installation hole 34.

[0044] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , as a specific embodiment of the retractable cleaning brush provided by the present utility model, a limiting boss 32 is provided on the outer wall of the tertiary support body 6, and an annular limiting groove 14 for cooperatively installing with the limiting boss 32 is provided on the inner wall of the second installation hole 34; the depth of the annular limiting groove 14 is less than that of the ring-shaped accommodation groove 13, and the annular limiting groove 14 is located above the ring-shaped accommodation groove 13; the fourth connection part 7 is located above the limiting boss 32; further, an annular limiting groove 14 is installed in the second installation hole 34, and the annular limiting groove 14 is located between the ring-shaped accommodation groove 13 and the third connection part 35, and the upper and lower ends of the annular limiting groove 14 are connected to the third connection part 35 and the ring-shaped accommodation groove 13; at the same time, a limiting boss 32 is provided on the outer wall of the tertiary support body 6. During the process of installing the tertiary support body 6 in the second installation hole 34, the fourth connection part 7 is connected to the third connection part 35, the limiting boss 32 is installed into the annular limiting groove 14, and the third bristles 61 are installed into the ring-shaped accommodation groove 13. In this way, the limiting of the tertiary support body 6 is realized, so that the installation position of the tertiary support body 6 is accurate.

[0045] Please refer to Figures 1 to 6, as a specific embodiment of the retractable cleaning brush provided by the present utility model, the first connecting portion 2 and the third connecting portion 35 are both internal thread segments, and the second connecting portion 4 and the fourth connecting portion 7 are both external thread segments that are fitted and installed with the internal thread segments; the radial dimension of the first sliding portion 5 is smaller than the radial dimension of the first mounting hole 12, and the radial dimension of the second sliding portion 8 is smaller than the radial dimension of the second mounting hole 34; when the secondary support body 3 is installed on the primary support body 1 or the tertiary support body 6 is installed on the secondary support body 3, the first connecting portion 2 and the third connecting portion 35 are set as internal thread segments, and the second connecting portion 4 and the fourth connecting portion 7 are set as external thread segments. Therefore, the staff can screw the secondary support body 3 or the tertiary support body 6 and achieve the axial movement of the secondary support body 3 or the tertiary support body 6 by means of threaded connection, so as to achieve the purpose of controlling the second bristles 31 or the third bristles 61 to move outwards or retract into the first hole or the second hole. The two second connecting portions 4 and the first sliding portion 5 are set as T-shaped structures, and the two fourth connecting portions 7 and the second sliding portion 8 are set as T-shaped structures, so that the secondary support body 3 or the tertiary support body 6 can move quickly.

[0046] Please refer to Figure 7 , as a specific embodiment of the retractable cleaning brush provided by the present utility model, the first connecting portion 2 and the third connecting portion 35 each include a plurality of spring plungers 21, and the second connecting portion 4 and the fourth connecting portion 7 are both annular grooves 41 that are fitted and installed with the balls of the spring plungers 21; the radial dimension of the first sliding portion 5 is smaller than the radial dimension of the first mounting hole 12, and the radial dimension of the second sliding portion 8 is smaller than the radial dimension of the second mounting hole 34; when the secondary support body 3 is installed on the primary support body 1 or the tertiary support body 6 is installed on the secondary support body 3, the first connecting portion 2 and the third connecting portion 35 are each set as a plurality of spring plungers 21 arranged annularly and evenly, and the second connecting portion 4 and the fourth connecting portion 7 are both annular grooves 41. Therefore, the staff can push and pull the secondary support body 3 or the tertiary support body 6 to move axially in the first mounting hole 12 or the second mounting hole 34, and at the same time, the spring plungers 21 are snapped into the corresponding annular grooves 41, so as to achieve the purpose of controlling the second bristles 31 or the third bristles 61 to move outwards or retract into the first hole or the second hole. The two second connecting portions 4 and the first sliding portion 5 are set as T-shaped structures, and the two fourth connecting portions 7 and the second sliding portion 8 are set as T-shaped structures, so that the secondary support body 3 and the tertiary support body 6 can move quickly.

[0047] Please refer to Figures 1 to 6, as a specific embodiment of the retractable cleaning brush provided by the present utility model, the primary support body 1, the secondary support body 3 and the tertiary support body 6 are all cylindrical structures. A through water injection hole 62 is provided in the tertiary support body 6, and a plug 63 for detachably connecting and closing the water injection hole 62 is provided at the upper end of the tertiary support body 6. When using the first bristles 11 on the primary support body 1, the second bristles 31 on the secondary support body 3 or the third bristles 61 on the tertiary support body 6 to clean the test tube, open the plug 63 and add water flow from the water injection hole 62 into the test tube, so that the test tube can be cleaned faster and the cleaning effect is better. When the retractable cleaning brush is not in use, use the plug 63 to block the water injection hole 62.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A telescopic cleaning brush, characterized in that, Comprising: A primary support body, with a first brush arranged in a ring shape on the lower side of the outer wall and a through first mounting hole channel inside; A first connecting part, installed on the primary support body and arranged near the upper port of the first mounting hole channel; A secondary support body, installed in the first mounting hole channel and protruding above the primary support body at the upper end; a second brush arranged in a ring shape is provided on the lower side of the outer wall of the secondary support body; Two second connecting parts are both arranged on the outer wall of the secondary support body; the two second connecting parts are located above the second brush and are spaced apart; the second connecting part is connected to the first connecting part and is used to fix the secondary support body to penetrate or retract into the first mounting hole channel; A first sliding part is arranged on the outer wall of the secondary support body and is located between the two second connecting parts; the first sliding part is slidably connected to the first mounting hole channel.

2. The retractable cleaning brush according to claim 1, wherein The primary support body and the secondary support body are coaxially arranged, and the length of the secondary support body is greater than the length of the primary support body; a ring-shaped accommodation groove for accommodating the second brush is provided on the lower side of the inner wall of the first mounting hole channel.

3. The retractable cleaning brush according to claim 2, wherein, A limiting boss is arranged on the outer wall of the secondary support body, and an annular limiting groove for cooperating with the limiting boss is provided on the inner wall of the first mounting hole channel; the depth of the annular limiting groove is less than the depth of the ring-shaped accommodation groove, and the annular limiting groove is located above the ring-shaped accommodation groove; the second connecting part is located above the limiting boss.

4. The retractable cleaning brush according to claim 2, characterized in that, An operation protruding part is provided at the upper end of the secondary support body.

5. The retractable cleaning brush according to claim 1, wherein A through second mounting hole channel is provided on the secondary support body, and a third connecting part is provided at the upper port of the second mounting hole channel; the retractable cleaning brush further comprises: A tertiary support body, installed in the second mounting hole channel and protruding above the secondary support body at the upper end; a third brush arranged in a ring shape is provided on the lower side of the outer wall of the tertiary support body; Two fourth connecting parts are both arranged on the outer wall of the tertiary support body; the two fourth connecting parts are located above the third brush and are spaced apart; the third connecting part is connected to the fourth connecting part and is used to fix the tertiary support body to penetrate or retract into the second mounting hole channel; A second sliding part is arranged on the outer wall of the tertiary support body and is located between the two fourth connecting parts; the second sliding part is slidably connected to the second mounting hole channel.

6. The retractable cleaning brush according to claim 5, wherein, The secondary support body and the tertiary support body are coaxially arranged, and the length of the tertiary support body is greater than the length of the secondary support body; a ring-shaped accommodation groove for accommodating the third brush is provided on the lower side of the inner wall of the second mounting hole channel.

7. The retractable cleaning brush according to claim 6, wherein A limiting boss is arranged on the outer wall of the tertiary support body, and an annular limiting groove for cooperating with the limiting boss is provided on the inner wall of the second mounting hole channel; the depth of the annular limiting groove is less than the depth of the ring-shaped accommodation groove, and the annular limiting groove is located above the ring-shaped accommodation groove; the fourth connecting part is located above the limiting boss.

8. The retractable cleaning brush according to claim 5, wherein, The first connecting portion and the third connecting portion are both internal thread segments, and the second connecting portion and the fourth connecting portion are both external thread segments that are fitted and installed with the internal thread segments; the radial dimension of the first sliding portion is smaller than the radial dimension of the first installation hole passage, and the radial dimension of the second sliding portion is smaller than the radial dimension of the second installation hole passage.

9. The retractable cleaning brush according to claim 5, wherein, The first connecting portion and the third connecting portion both include a plurality of spring plungers, and the second connecting portion and the fourth connecting portion are both annular grooves that are fitted and installed with the balls of the spring plungers; the radial dimension of the first sliding portion is smaller than the radial dimension of the first installation hole passage, and the radial dimension of the second sliding portion is smaller than the radial dimension of the second installation hole passage.

10. The retractable cleaning brush according to claim 5, wherein, The primary support body, the secondary support body, and the tertiary support body are all cylindrical structures. A water injection hole is provided through the tertiary support body, and a plug for detachably connecting and closing the water injection hole is provided at the upper end of the tertiary support body.

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