A roller brush with a roller that is easy to replace

Abstract

The utility model relates to the technical field of roller brush, specifically disclose a kind of roller brush of roller convenient to replace, it includes: extension rod and the handle of installation in the one end of extension rod, the one end of handle away from extension rod is equipped with roller, still include: mounting groove, open in the one end of extension rod, the one end of handle is installed in mounting groove;Outer fixed unit is set on the extension rod, and outer fixed unit is connected with the outer ring of handle;Inner fixed unit is set in mounting groove, and the inner fixed unit is connected with the inner wall of handle.The utility model passes through the mounting groove of extension rod end part and reserves adaptive allowance, can accommodate different diameter and interface shape handle end part insertion, adjust sleeve drive clamping head radial telescopic, can adapt to the handle of different outer ring size;Inner fixed unit then relies on elastic member and pushes the self-adapting telescopic of limit head, compatible handle of different inner diameter specifications, adapt to the handle of different length or inner wall stress point.

Description

Technical Field

[0001] This utility model belongs to the field of roller brush technology, specifically relating to a roller brush that facilitates roller replacement. Background Technology

[0002] On construction sites, roller brushes are commonly used tools for painting, especially for painting large flat surfaces such as walls and ceilings. Because the work area often involves heights or requires an expanded working range, workers typically connect the roller brush handle to an extension rod to extend the working distance. When changing rollers, the roller body, along with its handle, must be completely removed from the extension rod. After replacing with a new roller, it must be reassembled with the extension rod before continuing work. Furthermore, roller brushes on the market come in various brands and specifications, with differences in handle diameter, connector shape, and other characteristics.

[0003] A search revealed that CN222686038U discloses a roller brush with easy roller replacement, including a roller brush frame, a roller brush body sleeved on the top rod of the roller brush frame, a baffle sleeved on the top rod of the roller brush frame for limiting the roller brush body, a stop block inserted into the surface of the top rod of the roller brush frame for limiting the baffle, a storage groove opened on the outer ring surface of the baffle, a flexible waterproof cover sleeved inside the storage groove, and the flexible waterproof cover sleeved on one end of the roller brush body.

[0004] The existing extension rods on roller brushes have poor compatibility and cannot be adapted to roller handles of different sizes. The contractor needs to equip multiple extension rods of different specifications, and improper adaptation can easily lead to loose connections, causing the roller to wobble during painting. Utility Model Content

[0005] The purpose of this utility model is to provide a roller brush that is easy to replace the roller, in order to solve the problems mentioned in the background art, such as the low adaptability of the extension rods on the existing roller brushes, which cannot be adapted to roller handles of different sizes, requiring the construction party to equip multiple extension rods of different specifications, and improper adaptation can easily lead to loose connections and the rollers easily shaking during painting.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A roller brush for easy roller replacement includes an extension rod and a handle mounted on one end of the extension rod, with a roller mounted on the end of the handle away from the extension rod, and further includes: A mounting slot is provided at one end of the extension rod, and one end of the handle is installed in the mounting slot. An external fixing unit is mounted on the extension rod and is connected to the outer ring of the handle. An internal fixing unit is disposed in the mounting groove and is connected to the inner wall of the handle.

[0007] In one embodiment, the external fixation unit includes: Several clamping heads are provided, and several through holes are provided on the inner wall of the mounting groove. The clamping heads are installed in the corresponding through holes, and the several clamping heads are in contact with the outer ring of the handle. The control sleeve is fitted onto the extension rod, and the bottom end of the control sleeve simultaneously contacts several clamping heads.

[0008] In one embodiment, the external fixation unit further includes: A connecting plate is installed on the control sleeve, and the connecting plate is sleeved on the extension rod; The adjusting sleeve is threadedly connected to the extension rod, and the adjusting sleeve is rotatably connected to the connecting plate.

[0009] In one embodiment, the bottom end of the control sleeve is equipped with a plurality of contact wheels, and the end of the clamping head away from the handle is provided with a first inclined surface, and the contact wheels contact the first inclined surface.

[0010] In one embodiment, the internal fixation unit includes: A positioning rod is installed in the mounting slot, and the positioning rod is located inside the handle; Several limit heads are installed on the positioning rod and distributed in a circular array. Several limit heads are in contact with the inner wall of the handle.

[0011] In one embodiment, the internal fixation unit further includes: Several grooves are formed on the surface of the positioning rod, and the limiting head is installed in the corresponding groove; Several elastic elements are installed in corresponding grooves, with the elastic elements positioned between the inner wall of the groove and the limiting head.

[0012] In one embodiment, the end of the limiting head away from the elastic element is provided with a second inclined surface.

[0013] In one embodiment, an adjustment groove is provided on the inner wall of the mounting groove, and one end of the positioning rod is connected to the adjustment groove.

[0014] In a preferred embodiment, a lead screw is installed in the adjusting groove, one end of which is threadedly connected to the positioning rod, and the other end of which extends to the outside of the extension rod and is fitted with a knob.

[0015] In a preferred embodiment, an anti-slip pad is installed at the end of the clamping head near the handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are: The mounting groove at the end of the extension rod provides a fitting allowance, accommodating handles with different diameters and interface shapes. The adjusting sleeve drives the clamping head to extend and retract radially, adapting to handles with different outer ring sizes. The inner fixing unit relies on the elastic element to push the limiting head to extend and retract adaptively, making it compatible with handles of different inner diameters and adapting to handles of different lengths or inner wall stress points.

[0017] Multiple clamping heads are evenly distributed circumferentially and make close contact with the outer ring of the handle through anti-slip pads, forming a multi-point balanced clamping; the limiting heads of the inner fixing unit are also arranged in a circumferential array, and with the help of elastic elements, they continuously press against the inner wall of the handle to provide stable support. The dual fixing structure applies force simultaneously from both the inner and outer sides of the handle to ensure a tight connection.

[0018] When the handle is inserted into the mounting slot, the second inclined surface of the limiting head can guide it to automatically complete the pre-positioning without additional unlocking operation; when locking, simply rotate the adjusting sleeve to drive the clamping head to clamp the handle; when disassembling, simply rotate the adjusting sleeve in the opposite direction and pull the handle directly to complete the separation. The operation steps are simple and intuitive, shortening the roller replacement time. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective.

[0021] Figure 3 This is a cross-sectional schematic diagram of the control sleeve, connecting plate, and adjusting sleeve of this utility model.

[0022] Figure 4 This is a cross-sectional schematic diagram of the extension rod of this utility model.

[0023] Figure 5 This is a cross-sectional schematic diagram of the extension rod, outer fixing unit, and inner fixing unit of this utility model.

[0024] In the diagram: 100, extension rod; 101, mounting groove; 102, adjustment groove; 103, through hole; 200, handle; 201, roller; 300, external fixing unit; 301, clamping head; 302, control sleeve; 303, contact wheel; 304, connecting plate; 305, adjustment sleeve; 400, internal fixing unit; 401, positioning rod; 402, lead screw; 403, knob; 404, groove; 405, limit head; 406, elastic element. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 A roller brush for easy roller replacement includes an extension rod 100 and a handle 200 mounted on one end of the extension rod 100. A roller 201 is mounted on the end of the handle 200 away from the extension rod 100. The brush also includes: A mounting slot 101 is provided at one end of the extension rod 100, and one end of the handle 200 is installed in the mounting slot 101; An external fixing unit 300 is disposed on the extension rod 100 and is connected to the outer ring of the handle 200; An internal fixing unit 400 is disposed in the mounting groove 101, and the internal fixing unit 400 is connected to the inner wall of the handle 200.

[0027] Specifically, the mounting groove 101 at the end of the extension rod 100 serves as the basic receiving structure, with its internal space reserved for adaptation, allowing for the insertion of handles 200 ends of different sizes; the outer fixing unit 300 is disposed on the outer periphery of the end of the extension rod 100, used to apply clamping force from the outside of the handle 200, and the inner fixing unit 400 is arranged on the inner side of the groove wall of the mounting groove 101, used to provide supporting positioning force from the inner wall of the handle 200, the two forming a double fixing structure of inner and outer opposing clamping; and both the inner and outer fixing units 300 adopt a detachable design, by releasing their fixing relationship with the handle 200, the handle 200 together with the roller 201 can be directly removed from the mounting groove 101 for replacement.

[0028] In the above technical solution, the problems of low adaptability of the existing extension rod 100 and cumbersome replacement of the roller 201 are solved by the cooperation of the mounting groove 101 and the inner and outer double fixing units: the mounting groove 101 can be compatible with the insertion of the handle 200 end with different diameters and interface shapes, improving the universal adaptability of the extension rod 100; the outer fixing unit 300 and the inner fixing unit 400 form a bidirectional clamping and positioning from the outer ring and inner wall of the handle 200 to ensure a stable connection and prevent shaking or tool falling off during painting.

[0029] In one embodiment, the external fixation unit 300 includes: A plurality of clamping heads 301 are provided. The inner wall of the mounting groove 101 is provided with a plurality of through holes 103. The clamping heads 301 are installed in the corresponding through holes 103. The plurality of clamping heads 301 are in contact with the outer ring of the handle 200. The control sleeve 302 is sleeved on the extension rod 100, and the bottom end of the control sleeve 302 is in contact with several clamping heads 301 at the same time. The connecting plate 304 is installed on the control sleeve 302, and the connecting plate 304 is sleeved on the extension rod 100; Adjusting sleeve 305 is threadedly connected to extension rod 100, and adjusting sleeve 305 is rotatably connected to connecting plate 304.

[0030] Specifically, the adjusting sleeve 305 and the extension rod 100 are connected by a thread, utilizing the helical transmission characteristics of the threaded connection to convert the rotational motion into linear motion of the adjusting sleeve 305 along the axial direction of the extension rod 100. Since the adjusting sleeve 305 is rotatably connected to the connecting plate 304, the axial displacement of the adjusting sleeve 305 can synchronously drive the connecting plate 304 and the control sleeve 302 fixed thereto to move axially along the extension rod 100. The bottom end of the control sleeve 302 contacts several clamping heads 301, and its axial movement generates radial compressive force on the clamping heads 301. The clamping heads 301 are mounted on the... Within the through hole 103 on the inner wall of the mounting groove 101, the clamping head 301 can only extend and retract radially due to the limitation of the through hole 103, so that multiple clamping heads 301 extend synchronously toward the center of the mounting groove 101 and make tight contact with the outer ring of the handle 200 to form a clamping fixation; when the adjusting sleeve 305 is rotated in the opposite direction, the control sleeve 302 moves axially in the opposite direction, releasing the squeezing force on the clamping head 301, and the clamping head 301 resets and releases the handle 200, realizing convenient disassembly; at the same time, the circumferentially uniform arrangement of multiple clamping heads 301 ensures that the handle 200 is subjected to balanced force during clamping, in conjunction with the inner wall support of the inner fixing unit 400.

[0031] In one embodiment, the bottom end of the control sleeve 302 is equipped with a plurality of contact wheels 303, and the end of the clamping head 301 away from the handle 200 is provided with a first inclined surface, and the contact wheels 303 are in contact with the first inclined surface.

[0032] In the above technical solution, the contact wheel 303 at the bottom of the control sleeve 302 and the first inclined surface of the clamping head 301 form a rolling contact pair. By utilizing the physical characteristic that the rolling friction coefficient is much smaller than the sliding friction, the motion resistance between the control sleeve 302 and the clamping head 301 when moving axially is reduced, thus achieving a labor-saving and smooth operation. The first inclined surface is designed with a specific tilt angle. As a force transmission and guidance structure, it converts the axial linear movement of the control sleeve 302 along the extension rod 100 into a radial force perpendicular to the axis of the handle 200. When the control sleeve 302 moves axially downward with the adjusting sleeve 305, the contact wheel 303 rolls along the first inclined surface and applies axial pressure. The tilt angle of the first inclined surface decomposes this pressure into a component force that drives the clamping head 301 radially inward along the through hole 103, pushing the clamping head 301 to extend towards the center of the mounting groove 101 to clamp the outer ring of the handle 200.

[0033] In one embodiment, the internal fixation unit 400 includes: A positioning rod 401 is installed in the mounting groove 101, and the positioning rod 401 is disposed in the handle 200; Several limiting heads 405 are installed on the positioning rod 401 and are distributed in a circular array. Several limiting heads 405 are in contact with the inner wall of the handle 200. Several grooves 404 are formed on the surface of the positioning rod 401, and the limiting head 405 is installed in the corresponding groove 404; Several elastic elements 406 are installed in several corresponding grooves 404, and the elastic elements 406 are disposed between the inner wall of the groove 404 and the limiting head 405.

[0034] In one embodiment, the end of the limiting head 405 away from the elastic member 406 is provided with a second inclined surface.

[0035] In the above technical solution, the elastic element 406 can be an elastic sheet or a compression spring; several limiting heads 405 are arranged in a circumferential array, applying force evenly from multiple points on the inner wall of the handle 200, and cooperating with the outer ring clamping of the outer fixing unit 300 to achieve radial omnidirectional positioning of the handle 200; the elastic element 406 provides continuous elastic support, allowing the limiting heads 405 to adaptively extend and retract with the inner diameter of the handle 200, adapting to handles 200 with different inner diameter specifications, and expanding the universal range of the extension rod 100; the second inclined surface design of the limiting head 405 allows the limiting head 405 to automatically squeeze the inclined surface and retract when the handle 200 is inserted, completing the pre-positioning without manual operation, and the elastic element 406 automatically resets and tightens after insertion, and can be loosened by applying force in the opposite direction when disassembling.

[0036] In one embodiment, an adjustment groove 102 is provided on the inner wall of the mounting groove 101, and one end of the positioning rod 401 is connected to the adjustment groove 102. A lead screw 402 is installed in the adjustment groove 102, one end of the lead screw 402 is threadedly connected to the positioning rod 401, and the other end of the lead screw 402 extends to the outside of the extension rod 100 and is fitted with a knob 403.

[0037] Specifically, the adjusting groove 102 provides an axial movement track for the positioning rod 401 and restricts its circumferential rotation. The lead screw 402 is threadedly connected to the positioning rod 401. Utilizing the helical characteristics of the threaded transmission, the rotational motion of the knob 403 is converted into the linear axial motion of the positioning rod 401 along the adjusting groove 102. By rotating the knob 403, the extension or retraction distance of the positioning rod 401 can be precisely controlled, and the contact position between the limiting head 405 and the inner wall of the handle 200 can be adjusted. The extension and retraction of the positioning rod 401 can be adapted to different handles 200.

[0038] In a preferred embodiment, an anti-slip pad is installed at one end of the clamping head 301 near the handle 200. The anti-slip pad is made of a flexible material with a high coefficient of friction, such as rubber or silicone, and is fixed to the contact end between the clamping head 301 and the handle 200. The flexibility of the anti-slip pad allows it to deform slightly with the clamping force, conforming to the slight bumps or curvatures on the outer surface of the handle 200.

[0039] The working principle and usage process of this utility model are as follows: When replacing the roller 201, first rotate the knob 403 on the outside of the extension rod 100. Through the threaded engagement between the lead screw 402 and the positioning rod 401, the positioning rod 401 is driven to move axially along the adjusting groove 102 and adjusted to a position suitable for the handle 200 to be installed. Then, with one end of the handle 200 with the roller 201 facing outward, insert the other end of the handle 200 into the mounting groove 101 of the extension rod 100. During the insertion process, the inner wall of the handle 200 presses against the second inclined surface of the limiting head 405, pushing the limiting head 405 to retract into the groove 404 of the positioning rod 401 and compressing the elastic element 406 until the handle 200 is inserted into place. The elastic element 406 resets and pushes the limiting head 405 outward and abuts against the inner wall of the handle 200 to complete the pre-positioning. Next, rotate the adjusting sleeve 305. Through the threaded connection between the adjusting sleeve 305 and the extension rod 100, the adjusting sleeve 305 moves axially along the extension rod 100. Through the connecting plate 30 4. The control sleeve 302 moves synchronously axially. The contact wheel 303 at the bottom of the control sleeve 302 rolls along the first inclined surface of the clamping head 301 and applies axial pressure. This pressure is converted into radial force through the first inclined surface, pushing the clamping head 301 to extend towards the center along the through hole 103 of the mounting groove 101 until the anti-slip pad at the end of the clamping head 301 is tightly fitted with the outer ring of the handle 200, thereby locking and fixing the handle 200. After that, the painting operation can be carried out. When the roller 201 needs to be replaced, the adjusting sleeve 305 is rotated in the opposite direction, the control sleeve 302 moves axially in the opposite direction, the pressure of the contact wheel 303 on the clamping head 301 is released, the clamping head 301 releases the outer ring of the handle 200, and then the handle 200 is pulled in the opposite direction. The inner wall of the handle 200 squeezes the second inclined surface of the limiting head 405 to make it contract, and the handle 200 and the roller 201 are directly removed from the mounting groove 101. After replacing the new handle 200, the above steps are repeated to complete the installation and resume the operation.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller brush for easy roller replacement, comprising an extension rod (100) and a handle (200) mounted on one end of the extension rod (100), wherein a roller (201) is mounted on the end of the handle (200) away from the extension rod (100), characterized in that, Also includes: A mounting slot (101) is provided at one end of the extension rod (100), and one end of the handle (200) is installed in the mounting slot (101); An external fixing unit (300) is disposed on the extension rod (100), and the external fixing unit (300) is connected to the outer ring of the handle (200); An internal fixing unit (400) is disposed in the mounting groove (101) and is connected to the inner wall of the handle (200).

2. The roller brush for easy roller replacement according to claim 1, characterized in that: The external fixation unit (300) includes: A plurality of clamping heads (301) are provided. The inner wall of the mounting groove (101) is provided with a plurality of through holes (103). The clamping heads (301) are installed in the corresponding through holes (103). The plurality of clamping heads (301) are in contact with the outer ring of the handle (200). The control sleeve (302) is fitted onto the extension rod (100), and the bottom end of the control sleeve (302) is in contact with several clamping heads (301) at the same time.

3. The roller brush for easy roller replacement according to claim 2, characterized in that: The external fixation unit (300) also includes: A connecting plate (304) is mounted on the control sleeve (302), and the connecting plate (304) is sleeved on the extension rod (100); The adjusting sleeve (305) is threadedly connected to the extension rod (100), and the adjusting sleeve (305) is rotatably connected to the connecting plate (304).

4. The roller brush for easy roller replacement according to claim 2, characterized in that: The bottom end of the control sleeve (302) is equipped with several contact wheels (303), and the end of the clamping head (301) away from the handle (200) is provided with a first inclined surface, and the contact wheels (303) are in contact with the first inclined surface.

5. The roller brush for easy roller replacement according to claim 1, characterized in that: The internal fixation unit (400) includes: A positioning rod (401) is installed in the mounting groove (101), and the positioning rod (401) is disposed in the handle (200); Several limit heads (405) are installed on the positioning rod (401) and arranged in a circular array. Several limit heads (405) are in contact with the inner wall of the handle (200).

6. The roller brush for easy roller replacement according to claim 1, characterized in that: The internal fixation unit (400) also includes: Several grooves (404) are formed on the surface of the positioning rod (401), and the limiting head (405) is installed in the corresponding groove (404); Several elastic elements (406) are installed in several corresponding grooves (404), and the elastic elements (406) are located between the inner wall of the groove (404) and the limiting head (405).

7. The roller brush for easy roller replacement according to claim 6, characterized in that: The limiting head (405) has a second inclined surface at the end away from the elastic member (406).

8. The roller brush for easy roller replacement according to claim 5, characterized in that: An adjustment groove (102) is provided on the inner wall of the mounting groove (101), and one end of the positioning rod (401) is connected to the adjustment groove (102).

9. The roller brush for easy roller replacement according to claim 8, characterized in that: A lead screw (402) is installed in the adjustment groove (102). One end of the lead screw (402) is threadedly connected to the positioning rod (401), and the other end of the lead screw (402) extends to the outside of the extension rod (100) and is equipped with a knob (403).

10. The roller brush for easy roller replacement according to claim 2, characterized in that: The clamping head (301) is fitted with an anti-slip pad at one end near the handle (200).

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