Multi-step roller adjustment device

Abstract

The application discloses a multi-gear roller adjusting device, which solves the problem of random staying position of the existing roller adjusting device. The multi-gear roller adjusting device comprises a shell and a roller, the shell is provided with a mounting seat, the roller is rotationally connected to the mounting seat, one of the roller and the mounting seat is provided with a locking portion, and the other is integrally formed with an elastic arm, the locking portion is provided with a plurality of locking grooves which are distributed at intervals along the rotating direction of the roller, the free end of the elastic arm is provided with a locking block which protrudes towards the locking groove, the roller has a staying state and a rolling state, in the staying state, the locking block is embedded in one of the locking grooves, and in the rolling state, the elastic arm is elastically deformed so that the locking block slides relative to the locking groove. The multi-gear roller adjusting device simplifies the structure of the roller locking mechanism in the roller adjusting device and reduces the material and labor costs of the roller adjusting device.

Description

Technical Field

[0001] This invention relates to the field of adjustment device technology, and in particular to a multi-position roller adjustment device. Background Technology

[0002] Common roller adjustment devices typically use rollers to adjust the parameters of the device, thereby controlling the operating parameters of the connected equipment, such as power, angle, light color temperature, etc.

[0003] In existing technologies, the positioning of rollers is typically achieved through the combination of springs, steel balls, and slots, as detailed in Chinese Utility Model Patent CN217214559U, entitled "A Roller Switch for Vehicles." However, in this structure, the steel balls and springs need to be assembled separately, leading to a corresponding increase in the material and labor costs of the roller adjustment device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art by proposing a multi-level roller adjustment device, so as to solve the problem of high cost of the existing roller adjustment device.

[0005] To achieve the above technical objectives, the present invention proposes a multi-position roller adjustment device, comprising a housing and a roller. The housing is provided with a mounting base, and the roller is rotatably connected to the mounting base. One of the roller and the mounting base has a locking portion, and the other has an integrally formed elastic arm. The locking portion has multiple locking grooves spaced apart along the rotation direction of the roller, and the free end of the elastic arm has a locking block protruding into the locking groove. The roller has a stationary state and a rolling state. In the stationary state, the locking block is engaged with one of the locking grooves. In the rolling state, the elastic deformation of the elastic arm causes the locking block to slide relative to the locking groove.

[0006] The multi-position roller adjustment device of the present invention has multiple locking grooves on the locking part that cooperate with the elastic arm to form multiple locking positions of the locking roller. The roller can be locked and unlocked by the cooperation of the elastic arm and the locking groove. The structure is simple and the positioning is reliable. Since the elastic arm is integrally formed on the roller or the mounting base, the structure of the roller locking mechanism in the roller adjustment device is simplified. At the same time, the elastic arm does not need to be assembled, thereby reducing the material and labor costs of the roller adjustment device.

[0007] Preferably, the roller is provided with a first stop rib and a second stop rib on its radially opposite sides, and the mounting base is provided with a first limiting wall and a second limiting wall accordingly. The first limiting wall stops the first stop rib at the extreme position of the roller rotating in a first direction, and the second limiting wall stops the second limiting rib at the extreme position of the roller rotating in a second direction. The first direction is opposite to the second direction.

[0008] By adopting the aforementioned technical solution, the roller adjustment device can limit the rolling range of the roller, thereby preventing the roller from rotating excessively.

[0009] Preferably, the locking portion includes a first locking rib near the first stop rib and a second locking rib near the second stop rib, wherein the first locking rib and the second locking rib protrude toward the elastic arm. When the first limiting wall stops the first stop rib, the first locking rib stops the locking block to restrict the roller from rotating in the second direction; When the second limiting wall stops the second stop rib, the second locking rib stops the locking block to restrict the roller from rotating in the first direction.

[0010] By adopting the aforementioned technical solution, two additional locking positions are formed on both sides of the locking part of the multi-position roller adjustment device, thereby increasing the number of adjustable positions in the multi-position roller adjustment device.

[0011] Preferably, the locking portion includes at least three locking ribs protruding toward the elastic arm, and the locking groove is formed between two adjacent locking ribs.

[0012] By adopting the aforementioned technical solution, since the locking groove is a force-bearing part, forming a locking groove between two adjacent locking ribs helps to increase the strength of the roller or mounting base at the locking groove position and improve the service life of the roller or mounting base. On the other hand, it also avoids the need to increase the thickness of adjacent positions to compensate for the reduction in strength caused by the depression of the locking groove in order to increase the strength of the locking groove position. This reduces the amount of material used, avoids material waste, and lowers the material cost of the multi-level roller adjustment device.

[0013] Preferably, the locking rib is strip-shaped, and the cross-section of the locking rib smoothly slopes from the highest point to both sides.

[0014] By adopting the aforementioned technical solution, the shape of the locking rib makes it difficult for the locking block to stay on the locking rib, and the locking block is more likely to fit into the locking groove and enter the stopping state; it can also reduce the resistance when the locking block slides relative to the locking groove, making the rolling of the roller smoother.

[0015] Preferably, the locking block has a spherical or conical end facing the locking groove.

[0016] By adopting the aforementioned technical solution, the friction between the locking block and the locking rib is reduced, allowing the locking block to slide more smoothly relative to the locking rib, further reducing jamming and improving the smoothness of the roller's rolling.

[0017] Preferably, the elastic arm elastically deforms along the axial direction of the roller, and the plurality of locking grooves are distributed in a fan-shaped pattern on the axial side of the roller or the mounting base.

[0018] By adopting the aforementioned technical solution, the elastic arm is set to elastically deform along the axial direction of the roller, which avoids the force applied by the user to the roller acting on the elastic arm or the locking groove. This allows the roller to maintain a roughly unchanged operating feel when the user moves the roller, thus improving the user experience.

[0019] Preferably, a partition groove is provided between the mounting base or the roller and the elastic arm.

[0020] By adopting the aforementioned technical solution, the elastic arm forms a cantilever structure. Compared with other complex structures, the cantilever structure is relatively simple and has sufficient reliability. While ensuring the normal function of the elastic arm, it makes the elastic arm easier to design and integrally mold, which helps to reduce costs.

[0021] Preferably, the mounting base includes a first support and a second support, and the roller is provided with a rotating shaft, the two ends of which are rotatably connected to the first support and the second support, respectively.

[0022] By adopting the aforementioned technical solution, the mounting base can stably support the roller, improve the stability and reliability of the roller rotation, and reduce the shaking of the roller during rotation.

[0023] Preferably, the first support and the second support are respectively provided with connecting grooves, and the two connecting grooves are respectively rotatably connected to the two ends of the rotating shaft. The rotating shaft is provided with a front limiting plate and a rear limiting plate, and at least one of the connecting grooves is located between the front limiting plate and the rear limiting plate. The front limiting plate and the rear limiting plate restrict the axial movement of the rotating shaft.

[0024] By adopting the aforementioned technical solution, the axial movement of the roller is restricted by the front and rear limit plates, thereby reducing the left and right wobbling of the roller when the user moves it, and improving the user experience.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0026] Figure 1This is an exploded view of the multi-level roller adjustment device in an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is another exploded view of the multi-position roller adjustment device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the roller in an embodiment of the present invention; Figure 5 This is a schematic diagram of the mounting base in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the multi-position roller adjustment device in an embodiment of the present invention; Figure 7 This is a schematic diagram of the locking part and the elastic arm cooperating in an embodiment of the present invention.

[0027] Figure label: 100. Housing; 110. Bottom shell; 120. Cover; 121. Operating window; 130. Mounting base; 131. First support; 1311. First limiting wall; 1312. Second limiting wall; 132. Second support; 133. Connecting groove; 134. Opening; 140. Elastic arm; 150. Locking block; 151. Base; 152. Locking head; 160. Dividing groove; 200, Roller; 201, Mounting groove; 210, Locking part; 211, Locking groove; 212, Locking rib; 2121, First locking rib; 2122, Second locking rib; 220, First stop rib; 230, Second stop rib; 240, Rotating shaft; 241, Front limit plate; 242, Rear limit plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" or "a number" means two or more, unless otherwise expressly defined.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] like Figures 1 to 7 As shown, the multi-level roller adjustment device proposed in this embodiment of the invention includes a housing 100 and a roller 200. The housing 100 is provided with a mounting base 130, and the roller 200 is rotatably connected to the mounting base 130.

[0033] In this embodiment, the housing 100 includes a bottom shell 110 and a cover 120. The cover 120 is fastened to the bottom shell 110 by a snap fastener, and the mounting base 130 is disposed on the bottom shell 110.

[0034] In this embodiment, the roller 200 is provided with a locking part 210, and the mounting base 130 is integrally formed with an elastic arm 140. The locking part 210 has a plurality of locking grooves 211 spaced apart along the rotation direction of the roller 200. One end of the elastic arm 140 is fixed to the mounting base 130, and the free end of the elastic arm 140 is provided with a locking block 150 protruding towards the locking groove 211. The roller 200 has a rolling state and a stationary state. In the stationary state, the locking block 150 is engaged with one of the locking grooves 211. In the rolling state, the elastic deformation of the elastic arm 140 causes the locking block 150 to slide relative to the locking groove 211.

[0035] The roller 200 or housing 100 is made of plastic and is integrally molded by injection molding. The elastic arm 140 utilizes the elasticity of the plastic material to achieve its elastic deformation and reset. Multiple locking grooves 211 cooperate with locking blocks 150 to form multiple locking positions for locking rollers 200.

[0036] In some other embodiments, the elastic arm 140 described above may be integrally formed on the roller 200, and the locking part 210 described above may be provided on the mounting base 130.

[0037] In this embodiment, the cover 120 is provided with an operation window 121, and a portion of the roller 200 is operably exposed through the operation window 121. The roller 200 has circumferential grooves. A gap is left between the roller 200 exposed through the operation window 121 and the operation window 121 itself. The operation window 121 is recessed towards the roller 200, forming an operating space for the user to manipulate the roller 200.

[0038] In this embodiment, the parameters of the multi-position roller adjustment device are adjusted by rotating the roller 200. The specific adjustment method will be described in detail in subsequent embodiments.

[0039] The multi-position roller adjustment device of the present invention has multiple locking grooves 211 on the locking part 210 cooperating with the elastic arm 140 to form multiple locking positions of the locking roller 200. The roller 200 can be locked and unlocked by the cooperation of the elastic arm 140 and the locking grooves 211. The structure is simple and the positioning is reliable. Since the elastic arm 140 is integrally formed on the roller 200 or the mounting base 130, the structure of the roller locking mechanism in the roller adjustment device is simplified. At the same time, the elastic arm 140 does not need to be assembled, thereby reducing the material and labor costs of the roller adjustment device.

[0040] In this embodiment, the locking block 150 and the elastic arm 140 are integrally formed.

[0041] In some other embodiments, the locking block 150 may also be mounted on the elastic arm 140.

[0042] In this embodiment, as Figure 2 As shown, the mounting base 130 includes a first support 131 and a second support 132. The roller 200 is provided with a rotating shaft 240, and the two ends of the rotating shaft 240 are rotatably connected to the first support 131 and the second support 132, respectively. The first support 131 is close to the outer side of the housing 100, and the second support 132 is close to the inner side of the housing 100.

[0043] By setting the first support 131 and the second support 132, the mounting base 130 can stably support the roller 200, improve the stability and reliability of the roller 200 rotation, and reduce the shaking of the roller 200 during rotation.

[0044] In order to limit the rotation range of the roller 200, in this embodiment, as follows: Figures 3 to 5As shown, the roller 200 has a first stop rib 220 and a second stop rib 230 respectively on its radially opposite sides. The mounting base 130 is correspondingly provided with a first limiting wall 1311 and a second limiting wall 1312. The first limiting wall 1311 stops the first stop rib 220 at the extreme position of the roller 200 rotating in the first direction, and the second limiting wall 1312 stops the second stop rib 230 at the extreme position of the roller 200 rotating in the second direction. The first direction is opposite to the second direction.

[0045] In this embodiment, the first limiting wall 1311 and the second limiting wall 1312 are disposed on both sides of the first support 131.

[0046] In some other embodiments, the first limiting wall 1311 and the second limiting wall 1312 may also be respectively provided on the first support 131 and the second support 132, and the first stop rib 220 and the second stop rib 230 are arranged opposite each other in the radial direction of the roller 200 and located on both sides of the axial direction of the roller 200.

[0047] This configuration allows the roller adjustment device to limit the rolling range of the roller 200, thereby preventing the roller 200 from rotating excessively.

[0048] In one embodiment, such as Figures 3 to 5 As shown, the locking part 210 includes a first locking rib 2121 near the first stop rib 220 and a second locking rib 2122 near the second stop rib 230, with the first locking rib 2121 and the second locking rib 2122 protruding toward the elastic arm 140.

[0049] When the first limiting wall 1311 stops the first stop rib 220 to restrict the roller 200 from rotating in the first direction, the first locking rib 2121 stops the locking block 150 to restrict the roller 200 from rotating in the second direction. The roller 200 is restricted from rotating in the first and second directions, thereby forming an additional locking position on the side of the locking part 210 near the first stop rib 220. When the user applies force to rotate the roller 200 in the second direction, the elastic deformation of the elastic arm 140 causes the locking block 150 to slide relative to the first locking rib 2121, and the roller 200 enters the rolling state.

[0050] When the second limiting wall 1312 stops the second stop rib 230 to restrict the roller 200 from rotating in the second direction, the second locking rib 2122 stops the locking block 150 to restrict the roller 200 from rotating in the first direction. The roller 200 is restricted to rotate in the first and second directions, thereby forming an additional locking position on the side of the locking part 210 near the second stop rib 230. When the user applies force to rotate the roller 200 in the first direction, the elastic deformation of the elastic arm 140 causes the locking block 150 to slide relative to the second locking rib 2122, and the roller 200 enters the rolling state.

[0051] This results in two additional locking positions on both sides of the locking part 210 of the multi-position roller adjustment device, thereby increasing the number of adjustable positions in the multi-position roller adjustment device.

[0052] In one embodiment, such as Figure 4 As shown, the locking part 210 includes at least three locking ribs 212 protruding toward the elastic arm 140, and a locking groove 211 is formed between two adjacent locking ribs 212.

[0053] Since the locking groove 211 is a load-bearing part, by forming the locking groove 211 between two adjacent locking ribs 212, on the one hand, it helps to increase the strength of the roller 200 or the mounting base 130 at the position of the locking groove 211 and improve the service life of the roller 200 or the mounting base 130; on the other hand, it also avoids the need to increase the thickness of the adjacent position to compensate for the depression of the locking groove 211 in order to increase the strength at the position of the locking groove 211, which would cause a decrease in strength. This reduces the amount of material used and avoids material waste, thereby reducing the material cost of the multi-level roller adjustment device.

[0054] In one embodiment, such as Figure 4 As shown, at least three locking ribs 212 include a first locking rib 2121 and a second locking rib 2122, which are located on both sides of the locking portion 210.

[0055] In this way, the elastic arm 140 has the same deformation when switching between multiple locking positions including both sides of the locking part 210. During the rotation of the roller 200, the deformation of the elastic arm 140 is relatively stable, which helps to improve the service life of the elastic arm 140.

[0056] It is understood that in some other embodiments, the locking portion 210 may also be partially recessed between the first locking rib 2121 and the second locking rib 2122 to form a plurality of locking grooves 211.

[0057] In one embodiment, such as Figure 4 , Figure 7 As shown, the locking rib 212 is strip-shaped, and the cross-section of the locking rib 212 smoothly slopes from the highest point to both sides.

[0058] The shape of the locking rib 212 makes it difficult for the locking block 150 to stay on the locking rib 212, and the locking block 150 is more likely to fit into the locking groove 211 and enter the stationary state; it can also reduce the resistance when the locking block 150 slides relative to the locking groove 211, making the rolling of the roller 200 smoother.

[0059] In one embodiment, such as Figure 2As shown, the locking block 150 has a spherical or conical end facing the locking groove 211.

[0060] This reduces the friction between the locking block 150 and the locking rib 212, allowing the locking block 150 to slide more smoothly relative to the locking rib 212, further reducing jamming and improving the smoothness of the roller 200's rolling.

[0061] In one embodiment, such as Figures 2 to 4 As shown, the elastic arm 140 is mounted on the mounting base 130. The elastic arm 140 elastically deforms along the axial direction of the roller 200, and multiple locking grooves 211 are distributed in a fan shape on the axial side of the roller 200.

[0062] In another embodiment, the elastic arm 140 may also be provided on the roller 200. The elastic arm 140 elastically deforms along the axial direction of the roller 200, and a plurality of locking grooves 211 are distributed in a fan shape on the axial side of the mounting base 130.

[0063] When the user rolls the roller 200, a radial force is applied to the roller 200. If the elastic arm 140 elastically deforms along the radial direction of the roller 200, the force applied to the roller 200 will act on the elastic arm 140, causing the friction between the locking block 150 and the locking groove 211 to change, resulting in a change in the rolling feel of the roller 200.

[0064] By setting the elastic arm 140 to elastically deform along the axial direction of the roller 200, the force applied by the user to the roller 200 is prevented from acting on the elastic arm 140 or the locking groove 211, so that when the user moves the roller 200, the roller 200 can maintain a roughly unchanged operating feel, thus improving the user experience.

[0065] In one embodiment, such as Figure 2 As shown, the locking block 150 includes a base 151 and a locking head 152. The base 151 is connected to the elastic arm 140, and the locking head 152 is located at one end of the base 151 away from the elastic arm 140. The locking head 152 has a spherical or conical end facing the locking groove 211.

[0066] For the same displacement, the greater the length of the locking block 150 in the deformation direction of the elastic arm 140, the smaller the required deformation of the elastic arm 140. Increasing the length of the locking block 150 in the deformation direction of the elastic arm 140 helps to reduce the required elastic deformation of the elastic arm 140 and increase the service life of the elastic arm 140. However, increasing the length of the locking block 150 reduces the structural strength of the locking block 150.

[0067] In this embodiment, the locking block 150 is divided into a base 151 and a locking head 152, wherein the diameter of the base 151 is larger than the diameter of the locking head 152. In this way, the length of the locking block 150 in the deformation direction of the elastic arm 140 is increased, while ensuring that the strength of the locking block 150 is not greatly reduced when its length is increased, thereby improving the service life of the elastic arm 140.

[0068] In one embodiment, such as Figure 2 As shown, the elastic arm 140 is mounted on the mounting base 130, and a partition groove 160 is provided between the mounting base 130 and the elastic arm 140, so that the elastic arm 140 forms a cantilever structure.

[0069] In some other embodiments, the elastic arm 140 is disposed on the roller 200, and a partition groove 160 is provided between the roller 200 and the elastic arm 140.

[0070] This design allows the elastic arm 140 to form a cantilever structure. Compared to other complex structures, the cantilever structure is relatively simple and has sufficient reliability. While ensuring the normal function of the elastic arm 140, it makes the elastic arm 140 easier to design and integrally mold, which helps to reduce costs.

[0071] In one embodiment, such as Figure 4 , Figure 5 As shown, the first support 131 and the second support 132 are respectively provided with connecting grooves 133. The two connecting grooves 133 are respectively rotatably connected to the two ends of the rotating shaft 240. The rotating shaft 240 is provided with a front limiting plate 241 and a rear limiting plate 242. At least one connecting groove 133 is located between the front limiting plate 241 and the rear limiting plate 242. The front limiting plate 241 and the rear limiting plate 242 restrict the axial movement of the rotating shaft 240.

[0072] In this embodiment, the front limiting plate 241 and the rear limiting plate 242 are both disposed on one end of the rotating shaft 240, and the front limiting plate 241 and the rear limiting plate 242 are respectively limited to the front and rear ends of the connecting groove 133 of the first support 131.

[0073] In some other embodiments, the front limiting plate 241 and the rear limiting plate 242 may also be respectively located at the two ends of the rotation.

[0074] The axial movement of the roller 200 is restricted by the front limit plate 241 and the rear limit plate 242, thereby reducing the left and right wobbling of the roller 200 when the user moves it, and improving the user experience.

[0075] In one embodiment, the multi-position roller adjustment device based on the foregoing embodiments, such as Figure 2As shown, the connecting groove 133 has an opening 134 that opens to the rotating shaft 240. The rotating shaft 240 is inserted into the connecting groove 133 through the opening 134. The minimum width of the opening 134 is smaller than the diameter of the rotating shaft 240. Through the elastic deformation of the rotating shaft 240 or the connecting groove 133, the rotating shaft 240 can be inserted into the connecting groove 133 through the opening 134.

[0076] Among them, a limiting rib is provided on at least one side of the upper end of the opening 134, and the limiting rib reduces the minimum width of the opening 134.

[0077] This design allows the roller 200 to rotate and be properly positioned on the mounting base 130, improving the installation stability of the roller 200 and reducing the probability of the roller 200 detaching from the mounting base 130.

[0078] In one embodiment, the adjustment of parameters of the multi-position roller adjustment device by the rotation of roller 200 is explained, such as... Figure 1 , Figure 6 As shown, the multi-position roller adjustment device also includes a circuit board. The roller 200 is provided with a mounting groove 201 for receiving the circuit board. The circuit board rotates with the roller 200, and the rotation of the circuit board realizes the adjustment of the parameters of the multi-position roller adjustment device.

[0079] In some embodiments, the tilt angle or rotation angle of the circuit board can be sensed by a sensor, thereby enabling parameter adjustment.

[0080] For example, a gyroscope sensor can be installed on the circuit board to sense the tilt angle of the circuit board, and the parameters can be adjusted through the sensing signal of the gyroscope sensor.

[0081] For example, a magnet is provided on one of the circuit board and the housing 100, and a Hall element is provided on the other. The rotation of the roller 200 changes the linear distance and linear direction between the magnet and the Hall element. The tilt angle or rotation angle of the circuit board is obtained through the sensing signal of the Hall element, thereby realizing parameter adjustment.

[0082] For example, the rotation direction and amplitude of the roller 200 can be sensed by a grating and a photoelectric sensor, thereby achieving parameter adjustment.

[0083] In some other embodiments, the parameters can also be adjusted by rotating the circuit board through the circuit structure.

[0084] For example, the circuit board is provided with conductive contacts, and the housing 100 is provided with multiple conductive contacts at different positions. The rotation of the circuit board makes the contacts at different positions conductive, thereby realizing parameter adjustment.

[0085] In some other embodiments, the rotation of the circuit board may cause changes in the resistance, capacitance, or electric field of the components on the circuit board, and the parameters may be adjusted through these changes.

[0086] By mounting the circuit board on the roller 200, the rotation of the roller 200 is more easily detected, thereby improving the adjustment accuracy of the multi-level roller adjustment device.

[0087] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A multi-position roller adjustment device, comprising a housing and rollers, wherein the housing is provided with a mounting base, and the rollers are rotatably connected to the mounting base, characterized in that, One of the roller and the mounting base is provided with a locking part, and the other is integrally formed with an elastic arm. The locking part has a plurality of locking grooves spaced apart along the rotation direction of the roller. The free end of the elastic arm is provided with a locking block protruding into the locking groove. The roller has a stationary state and a rolling state. In the stationary state, the locking block is engaged with one of the locking grooves. In the rolling state, the elastic deformation of the elastic arm causes the locking block to slide relative to the locking groove. The roller is provided with a first stop rib and a second stop rib on its radially opposite sides, and the mounting base is provided with a first limiting wall and a second limiting wall accordingly. The first limiting wall stops the first stop rib at the extreme position of the roller rotating in the first direction, and the second limiting wall stops the second stop rib at the extreme position of the roller rotating in the second direction. The first direction is opposite to the second direction. The locking part includes a first locking rib near the first stop rib and a second locking rib near the second stop rib, and the first locking rib and the second locking rib protrude in the direction of the elastic arm; When the first limiting wall stops the first stop rib, the first locking rib stops the locking block to restrict the roller from rotating in the second direction; When the second limiting wall stops the second stop rib, the second locking rib stops the locking block to restrict the roller from rotating in the first direction.

2. The multi-position roller adjustment device as described in claim 1, characterized in that, The locking portion includes at least three locking ribs that protrude toward the elastic arm, and the locking groove is formed between two adjacent locking ribs.

3. The multi-position roller adjustment device as described in claim 2, characterized in that, The locking rib is strip-shaped, and its cross-section smoothly slopes from the highest point to both sides.

4. The multi-position roller adjustment device as described in claim 1, characterized in that, The locking block is spherical or conical at one end facing the locking groove.

5. The multi-position roller adjustment device as described in claim 1, characterized in that, The elastic arm elastically deforms along the axial direction of the roller, and the plurality of locking grooves are distributed in a fan-shaped pattern on the axial side of the roller or the mounting base.

6. The multi-position roller adjustment device as described in claim 1, characterized in that, A partition groove is provided between the mounting base or the roller and the elastic arm.

7. The multi-position roller adjustment device as described in claim 1, characterized in that, The mounting base includes a first support and a second support. The roller is provided with a rotating shaft, and the two ends of the rotating shaft are rotatably connected to the first support and the second support, respectively.

8. The multi-position roller adjustment device as described in claim 7, characterized in that, The first support and the second support are respectively provided with connecting grooves, and the two connecting grooves are rotatably connected to the two ends of the rotating shaft. The rotating shaft is provided with a front limiting plate and a rear limiting plate. At least one of the connecting grooves is located between the front limiting plate and the rear limiting plate. The front limiting plate and the rear limiting plate restrict the axial movement of the rotating shaft.

Images