Cleaning brush

Abstract

The utility model relates to a cleaning brush which comprises a brush handle and a brush head, the brush handle comprises a first brush rod and a second brush rod, and the first brush rod and the second brush rod can slide relatively so that the second brush rod can stretch out or retract relative to the first brush rod; the brush head comprises a first brush body and a second brush body, the first brush body is fixed to the front end of the first brush rod, the second brush body is fixed to the front end of the second brush rod, and when the first brush rod and the second brush rod slide relatively to enable the second brush rod to be in the retracting position, the second brush body and the first brush body are combined to form the brush head. When the first brush rod and the second brush rod slide relatively to enable the second brush rod to be located at the extending position, the second brush body is separated from the first brush body and extends out relative to the first brush body. The first brush body and the second brush body of the cleaning brush are combined to form the large brush head, the second brush body extends out to form the small brush head, the large brush and the small brush can be flexibly switched and can deeply clean narrow gaps, and extra space is not needed for storage.

Description

Technical Field

[0001] This application relates to cleaning tools, and more specifically, to a cleaning brush. Background Technology

[0002] Cleaning brushes are useful tools for everyday household cleaning, used to remove stains from items. Different items have varying volumes and shapes, so using different sized cleaning brushes for different items is more convenient and practical. Larger brushes clean larger containers and areas faster, while smaller brushes clean smaller cavities and crevices more effectively. Traditional cleaning brushes often have a single handle with a fixed brush head at the top, which doesn't address both needs. Some cleaning brush sets provide a large brush and a small brush, storing the small brush inside the large brush to save space. The small brush can be removed from the large brush for use in narrow crevices, but this requires frequently picking up and putting down different sized brushes during cleaning, which is inconvenient. Furthermore, for ease of storage and aesthetic appeal, the small brush is usually shorter, making it difficult to clean deep, narrow crevices. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a cleaning brush that can flexibly switch between large and small brushes and can deeply clean narrow gaps, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this application to solve its technical problem is as follows: a cleaning brush is proposed, including a brush handle and a brush head. The brush handle includes a first brush rod and a second brush rod, which are slidable relative to each other so that the second brush rod extends or retracts relative to the first brush rod. The brush head includes a first brush body and a second brush body. The first brush body is fixed to the front end of the first brush rod, and the second brush body is fixed to the front end of the second brush rod. When the first brush rod and the second brush rod slide relative to each other so that the second brush rod is in the retracted position, the second brush body combines with the first brush body to form the brush head. When the first brush rod and the second brush rod slide relative to each other so that the second brush rod is in the extended position, the second brush body separates from the first brush body and extends relative to the first brush body.

[0005] According to one embodiment of the cleaning brush described in this application, the outer surface of the first brush body is provided with bristles, and the first brush body and its bristles form a receiving notch; the outer surface of the second brush body is provided with bristles, and the receiving notch matches the shape formed by the second brush body and its bristles. When the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the second brush body and its bristles are embedded in the receiving notch to form the brush head.

[0006] In one embodiment of the cleaning brush according to this application, the second brush rod is slidably inserted into the first brush rod, and the second brush rod slides back and forth relative to the first brush rod to extend or retract relative to the first brush rod. The first brush body has a through hole for the second brush rod to pass through. Further, the first brush rod has a sliding groove extending back and forth and penetrating the inside and outside of the first brush rod, and the second brush rod has a push key protruding through the sliding groove. Pushing or pulling the push key causes the second brush rod to slide back and forth along the first brush rod.

[0007] In one embodiment of the cleaning brush according to this application, the first brush rod is slidably inserted into the second brush rod, and the second brush rod slides back and forth along the first brush rod to extend or retract relative to the first brush rod. The second brush body is provided with a connecting rod that is fixedly connected to the second brush rod.

[0008] According to one embodiment of the cleaning brush described in this application, the cleaning brush further includes a limiting adjustment device for restricting relative sliding between the first brush rod and the second brush rod.

[0009] According to one embodiment of the cleaning brush described in this application, the limiting adjustment device includes a locking screw threaded through one of the relatively sliding first brush rod and the second brush rod. Tightening the locking screw positions the first brush rod and the second brush rod. Further, the locking screw passes through a sliding groove on the first brush rod that extends forward and backward and penetrates the inside and outside of the first brush rod, and is threadedly connected to a threaded hole on the second brush rod that slides inside the first brush rod, opposite the sliding groove. When the second brush rod slides backward along the first brush rod until the locking screw slides to the rear end of the sliding groove, tightening the locking screw positions the second brush rod in a retracted position. When the second brush rod slides forward along the first brush rod until the locking screw slides to the front end of the sliding groove, tightening the locking screw positions the second brush rod in an extended position.

[0010] According to one embodiment of the cleaning brush described in this application, the limiting adjustment device includes two elastic arms extending rearward from the rear end of a second brush rod slidably inserted into a first brush rod, and the rear ends of the two elastic arms are respectively provided with a stop protrusion; the limiting adjustment device also includes a plurality of pairs of stop recesses distributed at intervals on both sides corresponding to the sliding channel of the first brush rod; when the second brush rod slides relative to the first brush rod, causing the two elastic arms to elastically deform and engage the stop protrusions on both sides into a pair of stop recesses, the second brush rod and the first brush rod are locked relative to each other; when the second brush rod slides rearward relative to the first brush rod until the stop protrusion engages into the last pair of stop recesses among the plurality of pairs of stop recesses, the second brush rod is positioned in a retracted position; when the second brush rod slides forward relative to the first brush rod until the stop protrusion engages into the foremost pair of stop recesses among the plurality of pairs of stop recesses, the second brush rod is positioned in an extended position.

[0011] According to one embodiment of the cleaning brush described in this application, the limiting adjustment device includes a limiting protrusion that is elastically accommodated within one of the relatively sliding first brush rods and second brush rods, and can pass through a first limiting hole on one of the brush rods to embed into a corresponding second limiting hole on the other brush rod. When the limiting protrusion passes through the first limiting hole and embeds into the second limiting hole, it positions the first and second brush rods. Further, the limiting protrusion is fixed to one end of an elastic member abutting inside the second brush rod. When the elastic member extends through the first limiting hole on the second brush rod and the corresponding second limiting hole on the first brush rod that slides outside the second brush rod, it positions the first and second brush rods.

[0012] According to one embodiment of the cleaning brush described in this application, the limiting adjustment device includes a snap-fit ​​structure disposed on a first brush body and a second brush body, which cooperates to prevent the second brush body from separating from the first brush body. Further, the snap-fit ​​structure includes a snap-fit ​​portion disposed on the second brush body and a locking surface formed on the first brush body that cooperates with the snap-fit ​​portion. When the first brush rod and the second brush rod slide relative to each other until the snap-fit ​​portion on the second brush body hooks the locking surface on the first brush body, the second brush rod is positioned in a retracted position.

[0013] According to one embodiment of the cleaning brush described in this application, the brush handle further includes a handle disposed or formed at the rear of the stationary of either the relatively sliding first brush bar or the second brush bar.

[0014] According to one embodiment of the cleaning brush described in this application, the handle is fixed to the rear of the second brush rod that is slidably inserted into the first brush rod. The limiting adjustment device includes a squeezing groove formed between the handle and the second brush rod. When the first brush rod slides backward along the second brush rod until the rear end of the first brush rod is squeezed into the squeezing groove and pressed against it, the second brush rod is positioned in the extended position.

[0015] According to one embodiment of the cleaning brush described in this application, the handle is fixed to the rear of the first brush rod that is slidably inserted into the second brush rod. The limiting adjustment device includes a squeezing groove formed between the handle and the first brush rod. When the second brush rod slides backward along the first brush rod until the rear end of the second brush rod is squeezed into the squeezing groove and pressed against it, the second brush rod is positioned in the retracted position.

[0016] According to one embodiment of the cleaning brush described in this application, the first brush body is cylindrical, with bristles on its outer surface, a top receiving notch at the top, and a side receiving notch on its side; the second brush body includes a top section and a side section extending rearward from the outside of the top section, with bristles on the outer surfaces of the top section and the side section; when the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the top section of the second brush body is fitted into the top receiving notch of the first brush body, and the side section of the second brush body is fitted into the side receiving notch of the first brush body, forming the brush head.

[0017] According to one embodiment of the cleaning brush described in this application, the first brush body is cylindrical with bristles on its outer surface and a receiving notch at the top; the second brush body is hemispherical with bristles on its upper surface; when the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the second brush body is embedded in the receiving notch at the top of the first brush body to form the brush head.

[0018] According to one embodiment of the cleaning brush described in this application, the first brush body is in the shape of an arc-shaped plate, with an arc-shaped accommodating notch at the top and bristles on both sides of the accommodating notch; the second brush body is in the shape of an arc-shaped strip and has bristles at the top; when the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the second brush body is embedded in the accommodating notch of the first brush body to form the brush head.

[0019] The cleaning brush of this application has the following beneficial effects: According to the embodiments of this application, a first brush head is provided at the front end of a first brush rod, and a second brush head is provided at the front end of a second brush rod. Through the relative sliding of the first and second brush rods, the second brush rod retracts relative to the first brush rod, combining the first and second brush bodies to form a large brush head. The second brush rod extends relative to the first brush rod, separating the second brush body from the first brush body and extending out relative to the first brush body to serve as a separate small brush head. Thus, the cleaning brush according to the embodiments of this application achieves flexible switching between large and small brushes through an integrated, retractable, and deformable design. It not only combines the advantages of large and small brushes but is also convenient to use, saves time, and requires no extra space for storage. When the second brush head extends to serve as a small brush, the second brush rod extending relative to the first brush rod can also accumulate the length of the handle, allowing it to reach deeper, narrow crevices for cleaning or to clean higher, harder-to-reach areas. Therefore, the cleaning brush described in this application has a very wide range of applications. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the combined state structure of the cleaning brush according to the first embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the separated state structure of the cleaning brush according to the first embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the cleaning brush in the separated state according to the first embodiment of this application from another angle;

[0024] Figure 4 This is a cross-sectional view of the combined state structure of the cleaning brush according to the first embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the first brush body in the cleaning brush of the first embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the combined state structure of the cleaning brush according to the second embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the separated state structure of the cleaning brush according to the second embodiment of this application;

[0028] Figure 8 This is a structural schematic diagram of the cleaning brush in the separated state according to the second embodiment of this application from another angle;

[0029] Figure 9 This is a schematic diagram of the combined state structure of the cleaning brush according to the third embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the separated state structure of the cleaning brush according to the third embodiment of this application;

[0031] Figure 11 This is a cross-sectional view of the separated state structure of the cleaning brush according to the third embodiment of this application;

[0032] Figure 12 This is a schematic diagram of the combined state structure of the cleaning brush according to the fourth embodiment of this application;

[0033] Figure 13 This is a schematic diagram of the separated state structure of the cleaning brush according to the fourth embodiment of this application;

[0034] Figure 14 This is a cross-sectional view of the separated state structure of the cleaning brush according to the fourth embodiment of this application;

[0035] Figure 15 This is a schematic diagram of the combined state structure of the cleaning brush according to the fifth embodiment of this application;

[0036] Figure 16 This is a schematic diagram of the separated state structure of the cleaning brush according to the fifth embodiment of this application;

[0037] Figure 17This is a schematic diagram of the combined state structure of the cleaning brush according to the sixth embodiment of this application;

[0038] Figure 18 This is a schematic diagram of the separated state structure of the cleaning brush according to the sixth embodiment of this application;

[0039] Figure 19 This is a schematic diagram of the combined state structure of the cleaning brush according to the seventh embodiment of this application;

[0040] Figure 20 This is a schematic diagram of the separated state structure of the cleaning brush according to the seventh embodiment of this application;

[0041] Figure 21 This is a cross-sectional view of the combined state structure of the cleaning brush according to the seventh embodiment of this application.

[0042] Illustrations and symbols: 100, 200, 300, 400, 500, 600 - Cleaning brush; 10 - Brush handle; 11 - First brush rod; 111 - Sliding channel; 112 - Slide groove; 12 - Second brush rod; 121 - Push button; 13 - Handle; 131 - Hanging hole; 20 - Brush head; 21 - First brush body; 211 - Through hole; 212 - Top receiving notch; 213 - Side receiving notch; 214 - Brush bristles; 22 - Second brush body; 221 - Top section; 222 - Side section; 223-brush bristles; 224-connecting rod; 30-limit adjustment device; 311-locking screw; 312-threaded hole; 321-elastic arm; 322-gear protrusion; 323-gear recess; 324-stop part; 331-buckle part; 332-locking surface; 333-tightening groove; 341-first limit hole; 342-second limit hole; 343-elastic element; 344-limit protrusion; 345-tightening groove; 371-locking screw; 372-threaded hole. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.

[0044] Figures 1 to 4 A schematic diagram of the structure of a cleaning brush 100 according to a first embodiment of this application is shown, wherein, Figure 1 The combined state of the cleaning brush 100 is shown. Figure 2 and Figure 3 The images show the separation states of the cleaning brush 100 at different angles. Figure 4 This is a sectional view of the structure in its combined state. See also... Figure 1 and Figure 2As shown, the cleaning brush 100 includes a handle 10 and a brush head 20. The handle 10 further includes a first brush rod 11, a second brush rod 12, and a handle 13. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixed to the front end of the second brush rod 12. Preferably, both the first brush rod 11 and the second brush rod 12 are round rods. According to different embodiments of this application, their shapes are not limited to the illustrated embodiment and can also be, for example, elliptical or polygonal rods. The first brush rod 11 is hollow, and the second brush rod 12 is slidably inserted into the first brush rod 11 and can slide back and forth along the first brush rod 11 to extend or retract relative to the first brush rod 11. The handle 13 is fixed to the rear of the first brush rod 11. When the second brush rod 12 slides backward along the first brush rod 11 to the retracted position, see [reference needed]. Figure 1 As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20, which facilitates cleaning large areas and saves space when stored; when the second brush rod 12 slides forward along the first brush rod 11 to the extended position, see Figure 2 As shown, the second brush body 22 is separated from the first brush body 21 and extends relative to the first brush body 21. The second brush body 22 can be used alone as a small brush to clean narrow gaps. The second brush bar 12, which extends outward from the first brush bar 11, extends the length of the brush handle 10, making it easy to reach deeper narrow gaps or higher positions for cleaning.

[0045] See further Figure 3 Combination Figure 5 As shown, the first brush body 21 is generally cylindrical, with a through hole 211 in the center for the second brush rod 12 to pass through. Brush bristles 214 are provided on the outer surface. A top receiving notch 212 is provided at the top, and a side receiving notch 213 is provided on the side. The front end of the side receiving notch 213 can communicate with the corresponding side of the top receiving notch 212. Correspondingly, the second brush body 22 includes a top section 221 and a side section 222 extending rearward from the outside of the top section 221. The top section 221 is fixed to the front end of the second brush rod 12, and the side section 222 extends rearward toward the handle 13 and is located on the outside of the second brush rod 12. Brush bristles 223 are provided on the outer surfaces of both the top section 221 and the side section 222. When the second brush rod 12 slides backward along the first brush rod 11 to the retracted position, the top section 221 of the second brush body 22 is embedded in the top receiving notch 212 of the first brush body 21, and the side section 222 of the second brush body 22 is embedded in the side receiving notch 213 of the first brush body 21, forming a larger brush head 20.

[0046] See also Figure 1 , Figure 2 Combination Figure 4As shown, the first brush rod 11 has a groove 112 extending forward and backward and penetrating both the inside and outside of the first brush rod 11. The second brush rod 12 has a threaded hole 312 opposite the groove 112. A locking screw 311 passes through the groove 112 on the first brush rod 11 and is threadedly connected to the threaded hole 312. Thus, the locking screw 311 can be used as a push key; pushing or pulling the locking screw 311 along the groove 112 can cause the second brush rod 12 to slide forward and backward along the first brush rod 11. Simultaneously, the locking screw 311 can also be used as a limit adjustment device 30 to limit the relative sliding between the first brush rod 11 and the second brush rod 12. See details... Figure 4 Combination Figure 1 , Figure 2 As shown, pulling the locking screw 311 backward causes the second brush rod 12 to slide backward along the first brush rod 11, allowing the locking screw 311 to slide to the rear end of the slide groove 112. Tightening the locking screw 311 will then press the first brush rod 11 and the second brush rod 12 together, thereby completely retracting the second brush rod 12 into its retracted position. At this point, the cleaning brush 100 has a larger brush head 20, functioning as a large brush and saving space during storage. See also... Figure 2 As shown, pushing the locking screw 311 forward causes the second brush rod 12 to slide forward along the first brush rod 11, thus separating the second brush body 22 from the first brush body 21 and extending the second brush body 22. When the locking screw 311 slides to the front end of the slide groove 112, tightening the locking screw 311 will fully extend the second brush rod 12 and position it in the extended position. At this time, the cleaning brush 100 can use the second brush body 22 as a small brush to clean narrow crevices. Moreover, adjusting the position of the locking screw 311 along the slide groove 112 can also easily adjust the distance of the second brush rod 12 extending relative to the first brush rod 11, thereby flexibly changing the overall length of the brush handle 10 of the cleaning brush 100 to meet the user's needs. See further details. Figures 1-4 As shown, the handle 13 is fixed to the rear of the first brush rod 11 for easy gripping. The end of the handle 13 is also provided with a hanging hole 131 for easy hanging and storing of the cleaning brush 100.

[0047] Figures 6 to 8 A schematic diagram of the structure of a cleaning brush 200 according to a second embodiment of this application is shown, wherein, Figure 6 The combined state of the cleaning brush 200 is shown. Figure 7 and Figure 8 The images show the cleaning brush 200 in different separated states at various angles. See also... Figure 6 and Figure 7As shown, the cleaning brush 200 has a similar structure to the cleaning brush 100 of the first embodiment described above, and is also composed of a handle 10 and a brush head 20. The handle 10 further includes a first brush rod 11 and a second brush rod 12. The second brush rod 12 is slidably inserted into the first brush rod 11. The rear part of the first brush rod 11 is directly formed as a handle 13. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixed to the front end of the second brush rod 12. The first brush body 21 has a through hole 211 for the second brush rod 12 to pass through. When the second brush rod 12 slides backward along the first brush rod 11 to the retracted position, see [reference needed]. Figure 6 As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the second brush rod 12 slides forward along the first brush rod 11 to the extended position, see... Figure 7 As shown, the second brush body 22 is separate from the first brush body 21 and extends relative to the first brush body 21. The second brush body 22 can be used alone as a small brush. The second brush rod 12, which extends outward from the first brush rod 11, extends the length of the brush handle 10. To facilitate pushing and pulling the second brush rod 12, the first brush rod 11 has a groove 112 that extends back and forth and passes through the inside and outside of the first brush rod 11. The second brush rod 12 has a push button 121 that protrudes through the groove 112. Pushing and pulling the push button 121 along the groove 112 can drive the second brush rod 12 to slide back and forth along the first brush rod 11.

[0048] See section 6 for details. Figure 7 As shown, the cleaning brush 200 according to the second embodiment of this application differs from the cleaning brush 100 of the first embodiment in that: the first brush handle 11 and the second brush handle 12 are generally square, and the rear end of the first brush handle 11 is directly formed into a handle shape for easy gripping, rather than having an additional handle 13. Furthermore, the shapes and assembly methods of the first brush body 21 and the second brush body 22 are different. See also... Figure 7 and Figure 8 As shown, the first brush body 21 is generally arc-shaped and is obliquely fixed to the front end of the first brush rod 11. An arc-shaped top receiving notch 212, connecting to a through hole 211, is centrally located on the top of its outer surface, and bristles are provided on both sides of the top receiving notch 212. The second brush body 22 is an arc-shaped strip matching the top receiving notch 212, with bristles on its top. When the second brush rod 12 slides backward through the through hole 211 on the first brush body 21 and is in the retracted position, the second brush body 22 is embedded in the top receiving notch 212 of the first brush body 21, forming a larger brush head 20. When the second brush rod 12 slides forward through the through hole 211 on the first brush body 21 and extends forward, the second brush body 22 separates from the first brush body 21 and extends out from the first brush body 21.

[0049] See also Figure 8As shown, the cleaning brush 200 according to the second embodiment of this application differs further from the cleaning brush 100 of the first embodiment in that the limiting adjustment device 30 for restricting the relative sliding of the first brush rod 11 and the second brush rod 12 is implemented differently. See details... Figure 8 As shown, the rear end of the second brush rod 12, which is slidably inserted into the first brush rod 11, extends outward with two elastic arms 321. The rear ends of the two elastic arms 321 are respectively provided with a stop protrusion 322. At the same time, the sliding channel 111 of the first brush rod 11 is provided with several pairs of stop recesses 323 distributed at intervals on both sides. When the second brush rod 12 slides back and forth along the first brush rod 11, causing the two elastic arms 321 to elastically deform and engage the stop protrusions 322 on both sides into a pair of stop recesses 323, the second brush rod 12 and the first brush rod 11 are locked relative to each other. Furthermore, when the second brush rod 12 slides backward along the first brush rod 11 until its position protrusion 322 engages with the last pair of position recesses among the plurality of pairs of position recesses 323, the second brush rod 12 is positioned in the fully retracted position, and the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the second brush rod 12 slides forward along the first brush rod 11 until its position protrusion 322 engages with the foremost pair of position recesses among the plurality of pairs of position recesses 323, see [reference needed] Figure 8 As shown, the second brush rod 12 is positioned in the fully extended position, and the second brush body 22 extends separately from the first brush body 21, and can be used as a small brush independently. Furthermore, the sliding channel 111 of the first brush rod 11 is provided with a stop 324 in front of the pair of foremost stop recesses 323, and the second brush rod 12 slides forward along the first brush rod 11 until… Figure 8 When extended, the stop 324 abuts against the stop protrusions 322 at the rear ends of the two elastic cantilever arms 321 to prevent the second brush rod 12 from sliding forward and disengaging relative to the first brush rod 11.

[0050] Figures 9 to 11 A schematic diagram of the structure of a cleaning brush 300 according to a third embodiment of this application is shown, wherein, Figure 9 The combined state of the cleaning brush 300 is shown. Figure 10 The cleaning brush 300 is shown in its detached state. Figure 11 A cross-sectional view of the cleaning brush 300 in its detached state is shown. See also Figure 9 and Figure 10As shown, the cleaning brush 300 has a similar structure to the cleaning brush 100 of the first embodiment described above, and is also composed of a handle 10 and a brush head 20. The handle 10 further includes a first brush rod 11, a second brush rod 12, and a handle 13. The second brush rod 12 is slidably inserted into the first brush rod 11. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixed to the front end of the second brush rod 12. The first brush body 21 has a through hole 211 for the second brush rod 12 to pass through. The main difference between the cleaning brush 300 of the third embodiment of this application and the cleaning brush 100 of the first embodiment described above is that the cleaning brush 300 switches between a large brush and a small brush by sliding the first brush rod 11 back and forth along the second brush rod 12 to retract or extend the second brush rod 12 relative to the first brush rod 11. That is, when the first brush rod 11 slides forward along the second brush rod 12 so that the second brush rod 12 is in the retracted position, see Figure 9 As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the first brush rod 11 slides backward along the second brush rod 12 so that the second brush rod 12 is in the extended position, see... Figure 10 As shown, the first brush body 21 is retracted relative to the second brush body 22, causing the second brush body 22 to separate from the first brush body 21 and extend relative to the first brush body 21. The second brush body 22 can be used alone as a small brush, but the overall length of the brush handle 10 remains unchanged. See details. Figure 10 As shown, the shape and connection method of the first brush body 21 and the second brush body 22 of the cleaning brush 300 are exactly the same as those of the cleaning brush 100 in the first embodiment described above. Please refer to the detailed description of the first brush body 21 and the second brush body 22 of the cleaning brush 100 described above, which will not be repeated here.

[0051] The cleaning brush 300 according to the third embodiment of this application differs from the cleaning brush 100 of the first embodiment in that the limiting adjustment device 30 for restricting the relative sliding of the first brush rod 11 and the second brush rod 12 is implemented differently. See details. Figure 10 and Figure 11As shown, the first brush body 21 and the second brush body 22 are respectively provided with a latching structure that cooperates to prevent the second brush body 22 from separating from the first brush body 21 in the combined state. Specifically, the rear end of the side section 222 of the second brush body 22 is provided with an inwardly protruding latching part 331, and the rear end of the first brush body 21 forms a locking surface 332 that cooperates with the latching part 331. When the first brush rod 11 slides forward along the second brush rod 12 until the latching part 331 on the second brush body 22 hooks onto the locking surface 332 on the first brush body 21, the second brush body 22 and the first brush body 21 combine to form a larger brush head 20, while the second brush rod 12 is positioned in a retracted position relative to the first brush rod 11. Applying a large backward pulling force to the first brush rod 11 can cause the latching part 331 to disengage from the locking surface 332 through elastic deformation, thereby sliding the first brush rod 11 backward along the second brush rod 12, separating the first brush body 21 from the second brush body 22, and then the second brush body 22 extends outward. See also Figure 11 As shown, a handle 13 is fixed to the rear of the relatively stationary second brush rod 12 for easy gripping, and a clamping groove 333 is formed between the handle 13 and the second brush rod 12. When the first brush rod 11 slides backward along the second brush rod 12 until its rear end is squeezed into the clamping groove 333 between the second brush rod 12 and the handle 13, the first brush rod 11 can no longer slide, and the second brush rod 12 is positioned in the extended position relative to the first brush rod 11. The second brush body 22 can then be used as a small brush on its own.

[0052] Figures 12 to 14 A schematic diagram of the structure of a cleaning brush 400 according to a fourth embodiment of this application is shown, wherein, Figure 12 The combined state of the cleaning brush 400 is shown. Figure 13 The cleaning brush 400 is shown in its disassembled state. Figure 14 A cross-sectional view of the cleaning brush 400 in its detached state is shown. See also Figures 12 to 14 As shown, the cleaning brush 400 has a similar structure to the cleaning brush 300 of the third embodiment described above, also consisting of a handle 10 and a brush head 20. The handle 10 further includes a first brush rod 11, a second brush rod 12, and a handle 13. The second brush rod 12 is slidably inserted into the first brush rod 11, and the handle 13 is fixed to the rear of the second brush rod 12. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixed to the front end of the second brush rod 12. The first brush body 21 has a through hole 211 for the second brush rod 12 to pass through. The cleaning brush 400 also switches between a large brush and a small brush by sliding the first brush rod 11 back and forth along the second brush rod 12 to retract or extend the second brush rod 12 relative to the first brush rod 11. That is, when the first brush rod 11 slides forward along the second brush rod 12 so that the second brush rod 12 is in the retracted position, see [reference needed]. Figure 12As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the first brush rod 11 slides backward along the second brush rod 12 so that the second brush rod 12 is in the extended position, see... Figure 13 As shown, the first brush body 21 is retracted relative to the second brush body 22, so that the second brush body 22 is separated from the first brush body 21 and extends relative to the first brush body 21. The second brush body 22 can be used as a small brush on its own.

[0053] See details Figures 12 to 14 As shown, the cleaning brush 400 according to the fourth embodiment of this application differs from the cleaning brush 300 of the third embodiment in that the shapes and joining methods of the first brush body 21 and the second brush body 22 are different. See also Figure 13 and Figure 14 As shown, the first brush body 21 is cylindrical with bristles 214 on its outer surface and a top receiving notch 212 around the through hole 211. The second brush body 22 is hemispherical with bristles 223 on its upper surface. When the first brush rod 11 slides forward along the second brush rod 12, causing the second brush rod 12 to be in the retracted position relative to the first brush rod 11, the second brush body 22 is fitted into the top receiving notch 212 of the first brush body 21, forming a larger brush head 20.

[0054] See also Figures 12 to 14 As shown, the cleaning brush 400 according to the fourth embodiment of this application differs further from the cleaning brush 300 of the third embodiment in that the limiting adjustment device 30 for restricting the relative sliding of the first brush rod 11 and the second brush rod 12 is implemented differently. See details... Figure 12 and Figure 14 As shown, the first brush rod 11 and the second brush rod 12 are respectively provided with a first limiting hole 341 and a second limiting hole 342 that are aligned with each other when the second brush rod 12 is in the retracted position relative to the first brush rod 11. A limiting protrusion 344 is accommodated in the second brush rod 12 in an elastically loaded manner. Specifically, the limiting protrusion 344 can be fixed to one end of the elastic member 343 (e.g., V-shaped spring) that abuts against the second brush rod 12. When the first limiting hole 341 and the second limiting hole 342 are misaligned, the limiting protrusion 344 is confined within the second brush rod 12. The first brush rod 11 can slide back and forth relative to the second brush rod 12. When the first brush rod 11 slides forward along the second brush rod 12 until the first limiting hole 341 and the second limiting hole 342 are aligned, the limiting protrusion 344, under the action of elasticity, passes through the first limiting hole 342 and embeds into the second limiting hole 341, positioning the first brush rod 11 and the second brush rod 12. At this time, the first brush head 21 and the second brush head 22 combine to form a larger brush head 20. See also Figure 14 As shown, with Figures 9 to 11Similar to the cleaning brush 300 of the third embodiment shown, the cleaning brush 400 has a clamping groove 345 formed between the handle 13 fixed to the rear of the relatively stationary second brush rod 12 and the second brush rod 12, which is the same as the clamping groove 331 of the cleaning brush 300. When the first brush rod 11 slides backward along the second brush rod 12 until the rear end of the first brush rod 11 is squeezed into the clamping groove 345 between the second brush rod 12 and the handle 13 and pressed against it, the first brush rod 11 can no longer slide, and the second brush rod 12 is positioned in the extended position relative to the first brush rod 11. The second brush body 22 can be used alone as a small brush.

[0055] Figure 15 and Figure 16 A schematic diagram of the structure of a cleaning brush 500 according to a fifth embodiment of this application is shown, wherein, Figure 15 The combined state of the cleaning brush 500 is shown. Figure 16 The cleaning brush 500 is shown in its detached state. See also Figure 15 and Figure 16 As shown, the cleaning brush 500 has a similar structure to the cleaning brush 100 of the first embodiment described above, and is also composed of a brush handle 10 and a brush head 20. The brush handle 10 further includes a first brush rod 11, a second brush rod 12, and a handle 13 fixed to the rear of the first brush handle 11. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixed to the front end of the second brush rod 12. The main difference between the cleaning brush 500 of the fifth embodiment of this application and the cleaning brush 100 of the first embodiment described above is that the first brush body 21 may not have a through hole 211, the second brush rod 12 is hollow, the first brush rod 11 is slidably inserted into the second brush rod 12, and the second brush body 22 is provided with a connecting rod 224 and is fixedly connected to the second brush rod 12. The second brush rod 12 slides back and forth along the first brush rod 11 so that the second brush rod 12 extends or retracts relative to the first brush rod 11, thereby switching between a small brush and a large brush. That is, when the second brush rod 12 slides backward along the first brush rod 11 to bring the second brush rod 12 to the retracted position, see [reference needed]. Figure 15 As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the second brush rod 12 slides forward along the first brush rod 11 to the extended position, see... Figure 16 As shown, the second brush body 22 is separated from the first brush body 21 and extends out relative to the first brush body 21. The second brush body 22 can be used as a small brush on its own.

[0056] See also Figure 15 and Figure 16As shown, the shape and connection method of the first brush body 21 and the second brush body 22 of the cleaning brush 500 according to the fifth embodiment of this application are generally the same as those of the cleaning brush 100 of the first embodiment described above. For details, please refer to the detailed description of the first brush body 21 and the second brush body 22 of the cleaning brush 100 described above, which will not be repeated here. In addition, since the cleaning brush 500 adopts the form in which the first brush rod 11 is slidably inserted into the second brush rod 12 (that is, the second brush rod 12 is slidably sleeved outside the first brush rod 11), and the size of the brush is switched by sliding the second brush rod 12 back and forth, the rear end of the second brush body 22 of the cleaning brush 500 is fixedly connected to the connecting rod 224 by, for example, screws. The rear end of the connecting rod 224 is fixedly connected to the second brush rod 12. Thus, when the second brush rod 12 slides forward along the first brush rod 11, the second brush body 22 separates from the first brush body 21 under the support of the connecting rod 224 and extends relative to the first brush body 21. The first brush rod 11 and the extended connecting rod 224 extend the length of the brush handle 10.

[0057] The cleaning brush 500 according to the fifth embodiment of this application may also be provided with a limiting adjustment device for restricting the relative sliding of the first brush rod 11 and the second brush rod 12. In a specific embodiment, the limiting adjustment device may be implemented by one or more of the various implementation means such as locking screws, elastic buckles, elastic protrusions and squeezing grooves in the foregoing embodiments, or by one or more of other suitable technical means in the prior art.

[0058] Figure 17 and Figure 18 A schematic diagram of the structure of a cleaning brush 600 according to a sixth embodiment of this application is shown, wherein, Figure 17 The combined state of the cleaning brush 600 is shown. Figure 18 The cleaning brush 600 is shown in its detached state. See also Figure 17 and Figure 18 As shown, the cleaning brush 600 has a structure basically the same as the cleaning brush 500 of the fifth embodiment described above. The only difference is that the second brush head 22 of the cleaning brush 600 extends rearward from both sides of the top section 221 to form side sections 222, thereby forming an inverted U-shape. The rear ends of the two side sections 222 are respectively fixedly connected to the second brush rod 12 by two connecting rods 224. Correspondingly, an inverted U-shaped receiving notch is formed on the first brush head 21. The second brush head 22 is inserted into the receiving notch of the first brush head 11, thus forming a larger brush head 20. Compared with the cleaning brush 500 of the fifth embodiment described above, Figure 17 and Figure 18 The cleaning brush 600 of the sixth embodiment shown is more stable during the switching between large and small brushes and during use.

[0059] Figures 19 to 21 A schematic diagram of the structure of a cleaning brush 700 according to a seventh embodiment of this application is shown, wherein, Figure 19 The combined state of the cleaning brush 700 is shown. Figure 20 The cleaning brush 700 is shown in its detached state. Figure 21 A cross-sectional view of the cleaning brush 700 in its detached state is shown. See also... Figures 19 to 21 As shown, the cleaning brush 700 has a similar structure to the cleaning brush 500 of the fifth embodiment described above, also consisting of a handle 10 and a brush head 20. The handle 10 further includes a first brush rod 11, a second brush rod 12, and a handle 13. The first brush rod 11 is slidably inserted into the second brush rod 12, and the handle 13 is fixed to the rear of the first brush rod 11. The brush head 20 further includes a first brush body 21 and a second brush body 22. The first brush body 21 is fixed to the front end of the first brush rod 11, and the second brush body 22 is fixedly connected to the second brush rod 12 via a connecting rod 224. The second brush rod 12 slides back and forth along the first brush rod 11 to extend or retract relative to the first brush rod 11, thereby switching between a small brush and a large brush. That is, when the second brush rod 12 slides backward along the first brush rod 11 to the retracted position, see [reference needed]. Figure 19 As shown, the second brush body 22 combines with the first brush body 21 to form a larger brush head 20; when the second brush rod 12 slides forward along the first brush rod 11 to the extended position, see... Figure 20 As shown, the second brush body 22 is separated from the first brush body 21 and extends out relative to the first brush body 21. The second brush body 22 can be used as a small brush on its own.

[0060] The main difference between the cleaning brush 700 of the seventh embodiment of this application and the cleaning brush 500 of the fifth embodiment is that the first brush body 21 does not have a receiving notch, but forms a receiving notch by the bristles 214 provided on its outer surface. The second brush body 22 and the bristles 223 provided on its outer surface have a shape that matches the receiving notch. When the second brush rod 12 slides backward along the first brush rod 11 to the retracted position, the second brush head 22 and its bristles 223 are embedded in the receiving notch of the first brush head 21 and its bristles 214 to form a larger brush head 20.

[0061] See also Figures 19 to 21 As shown, the limit adjustment device 30 of the cleaning brush 700 is implemented using a locking screw 371. See details... Figure 21 As shown, the second brush rod 12 has a threaded hole 372, and a locking screw 371 is threaded through the threaded hole 372. When the locking screw 371 is tightened to press against the first brush rod 11 which is slidably inserted into the second brush rod 12, the first brush rod 11 and the second brush rod 12 are positioned and cannot slide relative to each other. When the locking screw 371 is loosened, the second brush rod 12 can slide back and forth along the first brush rod 11. The locking screw 371 can also be used as a push button to push and pull the second brush rod 12 back and forth. In this way, the user can flexibly adjust the length of the second brush body 22 according to actual needs.

[0062] The cleaning brush according to the above embodiments of this application has a first brush head at the front end of a first brush rod and a second brush head at the front end of a second brush rod. Through relative sliding of the first and second brush rods, the second brush rod retracts relative to the first brush rod, combining the first and second brush bodies to form a large brush head. The second brush rod extends relative to the first brush rod, separating the second brush body from the first brush body and extending it separately as a small brush head. The cleaning brush according to the above embodiments of this application achieves flexible switching between large and small brushes through an integrated, retractable, and deformable design, combining the advantages of both large and small brushes. When cleaning large areas, simply retract the second brush head and combine it with the first brush head to form a large brush head. When cleaning grooves and narrow crevices where the large brush head cannot reach, simply extend the second brush body relative to the first brush rod. The extended second brush rod can also accumulate the length of the handle, allowing it to reach deeper, narrower crevices or higher positions for cleaning. The cleaning brush according to the above embodiments of this application allows for flexible switching between large and small brushes, making it convenient to use, saving time and effort, improving work efficiency, and requiring no extra space when stored.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cleaning brush comprising a brush handle and a brush head, characterized in that: the brush handle comprises a first brush rod and a second brush rod, the first brush rod and the second brush rod being relatively slidable to extend or retract the second brush rod relative to the first brush rod; the brush head comprises a first brush body and a second brush body, the first brush body being fixed to the front end of the first brush rod, the second brush body being fixed to the front end of the second brush rod, the first brush rod and the second brush rod being relatively slidable so that the second brush body is combined with the first brush body to form the brush head when the second brush rod is in the retracted position, and the second brush body is separated from the first brush body and extended relative to the first brush body when the second brush rod is in the extended position; 2. The cleaning brush of claim 1, wherein, the outer surface of the first brush body is provided with bristles, and the first brush body and its bristles form a receiving gap; the outer surface of the second brush body is provided with bristles, and the receiving gap matches the shape of the second brush body and its bristles, the second brush body and its bristles being fitted into the receiving gap to form the brush head when the first brush rod and the second brush rod are relatively slidable so that the second brush rod is in the retracted position; 3. The cleaning brush of claim 2, wherein, the second brush rod is slidingly inserted into the first brush rod, and the second brush rod and the first brush rod are relatively slidable forward and backward to extend or retract the second brush rod relative to the first brush rod, the first brush body being provided with a through hole for the second brush rod to pass through; 4. The cleaning brush of claim 3, wherein, the first brush rod is provided with a sliding groove extending forward and backward and penetrating the first brush rod, and the second brush rod is provided with a push key exposed through the sliding groove, the push key being pulled to drive the second brush rod to slide forward and backward along the first brush rod; 5. The cleaning brush of claim 2, wherein, the first brush rod is slidingly inserted into the second brush rod, and the second brush rod is slidable forward and backward along the first brush rod to extend or retract the second brush rod relative to the first brush rod, the second brush body being provided with a connecting rod fixedly connected with the second brush rod; 6. The cleaning brush of claim 2, wherein, the cleaning brush further comprises a limiting and adjusting device for limiting the relative sliding of the first brush rod and the second brush rod.

7. The cleaning brush of claim 6, wherein, the limiting and adjusting device comprises a locking screw threadedly connected to one of the first brush rod and the second brush rod which are relatively slidable, and the first brush rod and the second brush rod are positioned by tightening the locking screw; 8. The cleaning brush of claim 7, wherein, the locking screw is threadedly connected to a threaded hole provided on the second brush rod and opposite to the sliding groove provided on the first brush rod and slidingly inserted into the first brush rod; when the second brush rod is slid backward along the first brush rod to the position where the locking screw slides to the rear end of the sliding groove, the second brush rod is positioned in the retracted position by tightening the locking screw; when the second brush rod is slid forward along the first brush rod to the position where the locking screw slides to the front end of the sliding groove, the second brush rod is positioned in the extended position by tightening the locking screw.

9. The cleaning brush of claim 6, wherein, The limiting adjustment device comprises two elastic arms extending from the rear end of the second brush rod slidingly inserted into the first brush rod, and gear protrusions are arranged at the rear ends of the two elastic arms; the limiting adjustment device further comprises a plurality of pairs of gear recesses distributed in front and back at corresponding sides in the sliding channel of the first brush rod; when the second brush rod is sliding relative to the first brush rod and the two gear protrusions are elastically deformed and clamped into a pair of gear recesses at the two sides, the second brush rod is locked relative to the first brush rod. When the second brush rod is sliding backward relative to the first brush rod and the gear protrusions are clamped into the last pair of gear recesses in the plurality of pairs of gear recesses, the second brush rod is positioned at the retracted position. When the second brush rod is sliding forward relative to the first brush rod and the gear protrusions are clamped into the first pair of gear recesses in the plurality of pairs of gear recesses, the second brush rod is positioned at the extended position.

10. The cleaning brush of claim 6, wherein, The limiting adjustment device comprises a limiting protrusion elastically loaded in one of the first brush rod and the second brush rod and embedded in the other of the first brush rod and the second brush rod through the first limiting hole and the second limiting hole, and the first brush rod and the second brush rod are positioned when the limiting protrusion is embedded in the second limiting hole through the first limiting hole.

11. The cleaning brush of claim 10, wherein, The limiting protrusion is fixed at one end of an elastic member abutting against the second brush rod, and the first brush rod and the second brush rod are positioned when the limiting protrusion is extended through the first limiting hole and the second limiting hole by the elastic force of the elastic member.

12. The cleaning brush of claim 6, wherein, The limiting adjustment device comprises a buckle structure arranged on the first brush body and the second brush body to prevent the second brush body from separating from the first brush body.

13. The cleaning brush of claim 12, wherein, The buckle structure comprises a buckle part arranged on the second brush body and a locking surface formed on the first brush body to cooperate with the buckle part, and the second brush rod is positioned at the retracted position when the second brush rod is sliding relative to the first brush rod and the buckle part on the second brush body hooks the locking surface on the first brush body.

14. The cleaning brush of claim 6, wherein, The brush handle further comprises a handle arranged or formed at the rear part of one of the first brush rod and the second brush rod which does not move.

15. The cleaning brush of claim 14, wherein, The handle is fixed at the rear part of the second brush rod slidingly inserted into the first brush rod, and the limiting adjustment device comprises a squeezing groove formed between the handle and the second brush rod, and the second brush rod is positioned at the extended position when the rear end of the first brush rod is squeezed into the squeezing groove and abuts tightly.

16. The cleaning brush of claim 14, wherein, The handle is fixed at the rear part of the first brush rod slidingly inserted into the second brush rod, and the limiting adjustment device comprises a squeezing groove formed between the handle and the first brush rod, and the second brush rod is positioned at the retracted position when the rear end of the second brush rod is squeezed into the squeezing groove and abuts tightly.

17. The cleaning brush of claim 2, wherein, The first brush body is cylindrical, and the outer surface is provided with bristles. A top accommodating gap is formed in the top of the first brush body, and a side accommodating gap is formed in the side of the first brush body. The second brush body comprises a top section and a side section extending rearward from the outer side of the top section. The outer surface of the top section and the side section is provided with bristles. When the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the top section of the second brush body is embedded in the top accommodating gap of the first brush body, and the side section of the second brush body is embedded in the side accommodating gap of the first brush body, thereby forming the brush head.

18. The cleaning brush of claim 2, wherein, The first brush body is cylindrical, and the outer surface is provided with bristles. A top accommodating gap is formed in the top of the first brush body. The second brush body is semispherical, and the upper surface is provided with bristles. When the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the second brush body is embedded in the top accommodating gap of the first brush body, thereby forming the brush head.

19. The cleaning brush of claim 2, wherein, The first brush body is arc-shaped and plate-shaped. A top accommodating gap is formed in the top of the first brush body, and bristles are arranged on both sides of the accommodating gap. The second brush body is arc-shaped and strip-shaped, and the top is provided with bristles. When the first brush rod and the second brush rod slide relative to each other and the second brush rod is in the retracted position, the second brush body is embedded in the accommodating gap of the first brush body, thereby forming the brush head.

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