Finger pinching roller

Abstract

The utility model relates to a roller mechanism capable of being operated by fingers. The roller mechanism comprises a roller, a connecting part and a finger pinching part, by constructing two relatively independent finger pinching parts, a traditional operation mode of holding a roller by hand is changed into a mode of pinching, pushing and rolling by fingers; the device is used for smearing and / or rolling substances, is suitable for scenes with small working ranges and small stress, and has the advantages of being flexible in operation, improving efficiency, saving materials, reducing cost, saving space, being high in robustness and the like.

Description

Technical Field

[0001] This application relates to the technical field of handheld rollers, and particularly to a finger-pinching roller. Background Art

[0002] Handheld rollers have different technical backgrounds and applications in different technical fields. In the industrial and architectural painting fields, handheld rollers are also known as rollers or paint rollers, and usually have a felt roller and a long handle to facilitate paint adsorption and long-distance work; in the stationery field, the forms of handheld rollers include stamping rollers, correction tape rollers, etc., and the difference lies in the transformation of the roller main structure and the addition of new functions; in the medical and beauty massage fields, handheld rollers also include massage rollers, skin detection rollers, surface disinfection rollers, etc., which further improve the roller surface structure and material, and couple with electronic devices to make them more functional and intelligent.

[0003] The above-mentioned handheld rollers conventionally include a handle member for grasping in structure, and their operation methods are convenient and effective for general application scenarios in life and industry. However, for some scenarios with a small working range and less force, considering efficiency, cost, operation experience, etc., new structures need to be explored. Summary of the Invention

[0004] In view of this, this application provides a finger-pinching roller and a using method, by constructing a new finger-pinching part, changing the operation method to finger pinching and pushing the roller.

[0005] In order to achieve the above object, the technical solution adopted in this application is:

[0006] A finger-pinching roller, characterized in that the finger-pinching roller includes: a roller main body having a cylindrical outer surface for smearing and / or rolling; two finger-pinching parts and their connecting part, the connecting part is an integral part penetrating the axial direction of the roller or two independent parts coupled to the axial direction of the roller; the finger-pinching parts are constructed as parts coupled to the connecting part and extending outward along the axial direction of the roller, for two fingers to relatively pinch the two finger-pinching parts and push the roller to move around the axis.

[0007] In some modified embodiments of the present application, the finger pinch roller also includes: the roller also has a local shape change, including diameter change, fillet or chamfer; and / or the outer surface of the roller is physically and / or chemically treated, including grinding, polishing, coating, plating or modification; and / or a shell is coupled to the outside of the roller body as a new outer surface or protective layer; and / or the roller body is replaced with a cylindrical body, and the cylindrical body includes a spindle body or a dumbbell body.

[0008] In some modified embodiments of the present application, the connection form of the connecting portion includes one or more combinations of bearing connection, hinge connection, ball and socket connection, pin connection, sliding connection, and fixed connection.

[0009] In some modified embodiments of the present application, the finger pinching portion also has a plate-shaped end portion for the finger pad to fit and apply pressure and friction. The finger pinching portion also has a plate-shaped end portion for the finger pad to fit and apply pressure and friction.

[0010] In some modified embodiments of the present application, the finger pinch roller also includes a wiping portion, which includes a wiping tool and / or an attachment. The wiping tool is a material or component used to remove substances adsorbed on the roller surface or to evenly distribute the adsorbed substances. The attachment is a consumable with a specific function that is adsorbed onto the roller surface or the wiping tool through physical or chemical action.

[0011] This application is mainly used for applying and / or rolling substances, and is suitable for scenarios with smaller scope and force, including but not limited to thermal management (applying thermal paste), beauty and massage, medicine and healthcare, stationery or chemical fields.

[0012] The present invention has the following beneficial effects: the present invention has a streamlined structure, which not only saves materials and reduces costs, but also simplifies the production process; the present invention can be used in scenarios where the working range and force are small, which can improve efficiency and make the operation more flexible; at the same time, due to the small size of the present invention, it is convenient for users to carry and store, which can significantly save space; and, in addition, the handle and connection parts of traditional handle rollers are easily damaged by external forces (stress concentration, fatigue, buckling, plastic deformation, crack propagation, etc.), while the present invention has a compact structure and high robustness.

[0013] More importantly, the present application provides users with a new operating experience. Fingers are one of the most flexible parts of the human body. They have a complex bone structure, numerous joints, and a rich distribution of muscles and nerves, which enables human fingers to perform fine movements, such as grasping, pinching, writing, etc. At the same time, the sensory nerve endings on the fingertips are very dense, making the fingers very sensitive to touch, which is very important for sensing the environment and force feedback. Therefore, although the finger-pinch roller has a smaller working surface range and applied pressure than the traditional handle roller, it has a more dexterous operating experience. For example, in the field of beauty and massage, the finger-pinch roller is more precise, delicate and gentle when applying cosmetics or health products. For example, in the field of medicine and medical treatment, using the finger-pinch roller to apply ointment to the damaged or diseased surface of the body can not only prevent infection but also provide keen perception of force feedback to relieve the patient's pain.

[0014] The above features enable this application to demonstrate its novelty, creativity and practicality in many aspects such as investment, production, transportation, and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1-1 This is a schematic diagram of the three-dimensional structure of Example 1 of the present application;

[0016] Figure 1-2 This is an exploded view of Example 1 of the present application;

[0017] Figure 1-3 This is a schematic diagram of the top view of the structure of Example 1 of the present application;

[0018] Figure 1-4 This is a side structural diagram of Example 1 of the present application;

[0019] Figure 2-1 This is a schematic diagram of the three-dimensional structure of Example 2 of the present application;

[0020] Figure 2-2 This is an exploded view of Example 2 of the present application;

[0021] Figure 3-1 A schematic diagram of the rounded three-dimensional structure of the roller body according to an embodiment of the present application;

[0022] Figure 3-2 This is a schematic diagram of the rounded corner top view of the roller body of an embodiment of the present application;

[0023] Figure 3-3 This is a schematic diagram of the chamfered three-dimensional structure of the roller body according to an embodiment of the present application;

[0024] Figure 3-4 This is a schematic diagram of the chamfered top view of the roller body according to an embodiment of the present application;

[0025] Figure 3-5 This is a schematic diagram of the variable diameter three-dimensional structure of the roller body according to an embodiment of the present application;

[0026] Figure 3-6 It is a schematic top view structure diagram of the variable-diameter roller body of the embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of the operation mode of the embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] 10. Roller body; 11. Outer surface of the roller; 12. Edge of the roller; 13. Side surface of the roller; 14. Inside of the roller; 15. Fillet; 16. Chamfer; 17. Variable diameter;

[0030] 20. Integral connection part; 21. First connection part; 22. Second connection part;

[0031] 31. First finger pinching part; 32. Second finger pinching part; 33. End face of the finger pinching part;

[0032] 40. Finger; 41. Target working surface. Specific embodiments

[0033] To make the objectives, technical solutions and beneficial effects of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application.

[0034] Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments. Embodiment 1

[0035] The finger-pinching roller in Embodiment 1 of the present application is as Figures 1-1 to 1-4 shown, and includes a roller body 10, an integral connection part 20, a first finger pinching part 31, and a second finger pinching part 32.

[0036] The roller body 10 has an outer surface 11, a roller edge 12, a roller side 13, and a roller interior 14, and can be integrally formed of a single material, including but not limited to plastic, rubber, metal, glass, ceramic, wood, or felt; it can also use a composite process to couple a new outer shell outside the outer surface as the outer surface or protective layer, and the coupling method can be a fixed connection or a movable connection. The material of the outer shell can be the same as that of the roller body or can use a flexible material or an adsorbent material, including but not limited to microfiber materials, sponges, soft rubber, activated carbon, diatomaceous earth, or natural fiber materials; in some embodiments, the roller side 13 can be recessed inward or protruded outward; in other embodiments, the roller interior 14 can be a hollow structure or a frame structure.

[0037] Preferably, the roller uses a cylindrical outer surface as the outer surface 11 to facilitate rolling and rolling. In some embodiments, a quasi-cylindrical outer surface can also be used. A quasi-cylindrical body means that the overall shape of the object is similar to a cylinder, has a generally circular cross-section, and there are slight bends or asymmetries locally, such as a spindle body, a dumbbell body, etc.; when there are special requirements, physical and / or chemical treatments can also be performed on the roller outer surface 11, including but not limited to grinding, polishing, coating, plating, or modification; among them, the coating or plating, for example, plating can refer to coating a thin layer of metal or plastic on the metal surface of certain articles, usually for aesthetic or storage purposes. The plating can be obtained by electrolysis, chemical methods, etc. to form a protective film, improve the surface characteristics, and enhance the corrosion resistance, wear resistance, and decoration of the article. The coating can be a viscous liquid coated on the surface of the object by spraying or other means, and after curing, it forms a thin film, mainly for improving surface characteristics, protection, insulation, and decoration purposes; among them, the modification refers to changing the properties of a material through physical or chemical means to meet specific use requirements, such as obtaining non-stickiness or reducing surface energy, etc. For example, common types of modified materials include reinforcing agents, flame retardants, antistatic agents, antioxidants, etc., which can improve the strength, hardness, heat resistance, and weather resistance of materials such as plastics.

[0038] The roller edge 12 is the transition part between the roller outer surface 11 and the roller side 13, and its shape will affect the use effect to a certain extent. It can be modified by means of a fillet 15, a chamfer 16, a diameter change 17, etc., as Figures 3-1 to 3-6 shown; preferably, the fillet 15 makes the roller outer surface 11 and the side 13 transition smoothly, so that the effect of smearing and rolling at the roller edge 12 is more uniform, such as when smearing a plastic-like material or massaging the body skin, the effect is significant.

[0039] The integral connection part 20 is a component that connects the roller body 10 and the first finger pinching part 31 and the second finger pinching part 32, and it provides the functions of connection, support, and a roller shaft at the same time; as Figures 1-1 to 1-4As shown, in this embodiment, a cylindrical rod is used as the integral connection part 20. The round rod passes through the axis of the roller body 10. One end of it is connected to the first finger pinching part 31, and the other end is connected to the second finger pinching part 32. After connection, the integral components 20, 31, and 32 can rotate relative to the roller body 10; the connection between the round rod and the first finger pinching part 31 and the second finger pinching part 32 is a fixed connection, including but not limited to bonding, welding, screw fastening, snap fitting, or mortise and tenon. In some embodiments, the connection method can be a movable connection, such as a hinge, ball joint, or pin, etc. In some other embodiments, an integral molding process of the connection part and the finger pinching part can also be adopted;

[0040] The connection method between the integral connection part 20 and the roller body 10 given in this embodiment is a simple mode. In some other embodiments, when it is necessary to improve stability and reduce rolling friction, bearing connection, hinge connection, ball socket connection, pin connection, sliding connection, etc. can be adopted; at the same time, in order to make the roller shaft rotate freely and not fall off easily, interference fit, clearance fit, etc. cooperation methods or positioning devices such as shaft shoulder / step, lock nut, retaining ring / circlip, stop ring, etc. can be used. In some other embodiments, in order to save costs and simplify production, an integral molding process of the roller body, connection part, and finger pinching part can also be adopted. At this time, there is no movable mechanism inside the roller, and the positions where sliding friction occurs during rotation are the end face 33 of the finger pinching part and the finger 34.

[0041] Preferably, in this embodiment, the first finger pinching part 31 and the second finger pinching part 32 have round plate-shaped ends 33 for the finger pulp to fit and apply pressure and friction; in some embodiments, the end face 33 of the finger pinching part can be plate-shaped. By plate-shaped, it means that the overall shape of the object is similar to a flat plate, but there are some additional structures or design units, such as edge deformation, bending, or uneven surface, such as round plate-shaped, square plate-shaped, polygon plate-shaped, plate-shaped with convex and concave surfaces, or plate-shaped with irregular edge deformation, etc.; in some other embodiments, surface treatment can also be performed on the end face 33 of the finger pinching part to make the stability and feel of finger pinching better, such as etching groove texture, surface film covering and gluing, etc. Embodiment Two

[0042] In Embodiment Two, another type of hand-held roller is also given, as Figure 2-1 and Figure 2-2 shown. Its roller body 10, first finger pinching part 31, and second finger pinching part 32 have the same features as those in Embodiment One, but the connection parts of the roller are the first connection part 21 and the second connection part 22, which are respectively coupled to the roller side 13 and extend into the roller interior 14 but are not connected through.

[0043] In this example, the first connecting portion 21 and the second connecting portion 22 are two cylindrical short rods, and their connection manner with the finger pinching portion is the same as the feature in the first embodiment; while their coupling with the roller body 10 is independent on both sides of the roller. Preferably, two short rods are respectively inserted into the interior 14 of the roller for a certain distance to provide connection, support and the function of a roller shaft;

[0044] This embodiment gives a simple mode of a connection manner. In some embodiments, when it is necessary to improve stability and reduce rolling friction, bearing connection, hinge connection, ball socket connection, pin connection, sliding connection, etc. can be adopted; at the same time, in order to make the roller shaft rotate freely and not easily fall off, interference fit, clearance fit and other fitting methods or positioning devices such as shaft shoulder / step, lock nut, retaining ring / circlip, stop ring, etc. can be adopted. Embodiment III

[0045] In this embodiment, the finger pinching roller is applied to the field of thermal management to pre-spread thermal paste. Thermal paste (or heat dissipation paste) is a filling type thermal interface material with good thermal conductivity. The material is in paste or liquid form, has a certain viscosity and fluidity, and has no obvious particle feeling on the surface. The common type of thermal paste is prepared by filling thermal conductive fillers in a polymer matrix, and has a dispersed phase structure, and its thermal conductivity is often dominated by the thermal conductive fillers. There are two traditional application methods for thermal paste: one is the direct pressure encapsulation method, such as dot coating method, five-point method, X-shaped coating method, etc., but there are still problems with these application methods. ① Without pre-spreading, it is difficult to apply an appropriate amount and may overflow; ② It is difficult to avoid enclosed microbubbles; ③ It depends on the pressing performance of the fastener; the other is pre-spreading and then encapsulation. Common application tools include plastic scrapers, silicone rubber finger cots, cotton swabs, etc., and there are still many problems. For example, for a plastic scraper, ① high skills are required for using the scraper, and it is easy to produce "scratches", "wire drawing", "peeling" and the like; ② it is picky about the type of thermal paste, and the higher the viscosity, the more difficult it is to apply; ③ it is difficult to apply pressure to the thermal paste continuously and stably, and it is not easy to thin it continuously and stably, and it is difficult to form a high-quality uniform layer and flat layer.

[0046] This embodiment provides a pre-spreading tool for thermal paste, which can improve the uniformity, flatness, compactness, adhesiveness, cohesion, resilience of the thermal paste, and obtain a pre-spreading layer with high thermal conductivity, low running-in period, high durability, and improved pump-out resistance, meeting the user's pursuit of simplicity and limit for high-quality application, overcoming the picky problem of thermal paste for radiator assembly, and realizing the high robustness of the application tool for thermal paste paving.

[0047] The technical solution of this embodiment is as follows: As Figure 4As shown, there is a roller body 10, which has a cylindrical smooth outer surface 11 for smearing and / or rolling, and can be repeatedly rolled on a working surface 41 to spread thermal paste and adjust the dispersed phase structure of the thermal paste; a first finger pinching part 31, a second finger pinching part 32 and their connecting part 20. The connecting part 20 is an integral part penetrating the axial direction of the roller, and in some other embodiments, it can be two independent components coupled to the axial direction of the roller; the first finger pinching part 31 and the second finger pinching part 32 are configured as components coupled to the connecting part 20 and extending outward along the axial direction of the roller, for two fingers 40 to relatively pinch the two finger pinching parts and push the roller to move around the axis.

[0048] In some modified embodiments of the present application, the finger pinching roller further includes: the local part of the roller also has a shape change, including diameter change, fillet or chamfer; and / or, the outer surface of the roller is subjected to physical and / or chemical treatment, including grinding, polishing, coating, plating or modification; and / or, a housing is coupled outside the roller body as a new outer surface or protective layer, and its material includes but is not limited to polytetrafluoroethylene, high-density polyethylene, nanotechnology coating, silicone coating or ceramic coating; and / or, the roller body is replaced with a quasi-cylinder, and the quasi-cylinder includes a spindle or a dumbbell. In some other modified embodiments of the present application, the connection form of the connecting part includes one or a combination of more of bearing connection, hinge connection, ball socket connection, pin connection, sliding connection, fixed connection. In some modified embodiments of the present application, the finger pinching part also has a plate-shaped end for the finger pulp to fit and apply pressure and friction force, and the plate shape includes circular plate shape, square plate shape, polygonal plate shape, plate shape with convex and concave surfaces or plate shape with irregularly deformed edges.

[0049] The technical principle and beneficial effects of this embodiment are as follows:

[0050] The fundamental reason for the many negative technical problems described above for the scraper is its operation method and mechanism. At the macroscopic level, the scraper obtains sliding friction force and shear slip force through the method of "one sticking and one pulling". Excessive shear slip force will bring negative problems such as wire scraping and peeling. At the same time, the sliding friction force depends on the contact area and the friction coefficient, and for the thermal paste with relatively high viscosity, more substances are easily adhered when it detaches; at the microscopic level, the shear stress can only make the solid particles in the dispersed phase translate and spread, but cannot achieve the effect of making them denser; relatively speaking, the roller obtains rolling friction force and vertical pressure through the method of "repeated rolling". Due to its small friction force, small contact area, large pressure and high-frequency repetitive operation, it reduces the negative effect of shear force while increasing the densification effect of pressure, which can be analogized to "rolling noodles" or "road roller" in reality, or the Poisson effect (lateral deformation effect) in plastic mechanics can be used to explain the effect of vertical pressure on horizontal spreading and thinning.

[0051] In the actual operation process, the finger-rolled roller has a cylindrical smooth outer surface. By repeatedly rolling on the working surface, a low-disturbance basic pre-paving layer can be obtained. Through the repeatable rolling friction method, the thixotropy of the thermal paste is fully utilized to adjust the dispersed phase structure inside, on the top surface, and on the bottom surface of the thermal paste, promoting the high-continuity, high-stability, and high-adaptability adjustment of the dispersed phase structure of the thermal paste under the influence of its own thixotropy, so as to achieve that the spreading layer obtained under the previous rolling will form a rolling layer with better properties after the next rolling. This rolling method can improve the adaptability of the thermal paste paving. During the whole process of thermal paste paving, especially in the later stage and even the finishing stage of paving, it can be repeatedly rolled at a relatively fast speed and with any pressure of the hand without worrying about the sensitivity of the squeegee to pressure and shear force. Even in the later stage and even the finishing stage of spreading, when the pre-spreading layer is already thin, has a uniform thickness, and can adhere relatively tightly to the surface of the heat source, it can still be repeatedly rolled. However, the pre-spreading layer will not be easily disturbed or even locally damaged by the subsequent rolling because it is already thin, that is, the thinning and properties of the pre-spreading layer are easily inherited by the subsequent rolling, so as to continuously optimize the thinness, further optimize the thickness uniformity, and further optimize the degree of fitting between the bottom surface of the pre-spreading layer and the micro-pits (or exclude gas to build more heat conduction paths). However, the method of using a squeegee shows the opposite situation due to its sensitivity to thinness and force.

[0052] Finally, the finger-rolled roller fully adjusts the dispersed phase structure inside, on the top surface, and on the bottom surface of the pre-spreading layer (such as the reduction of filler spacing, the uniformity of filler spacing, the re-distribution of the skeleton structure of large and small fillers, cohesion, compactness, adhesion, and resilience), as well as the flatness and smoothness of the top surface and the degree of embedding of the bottom surface (the degree and proportion to which the pre-spreading layer can overcome the shear force and be pressed into the micro-pits under repeated rolling). Among them, the flatness and smoothness of the top surface can reduce or avoid the formation of closed micro-bubbles after buckling; the degree of embedding of the bottom surface can exclude more gas in the micro-pits, thereby forming more heat conduction paths, and forming an anchoring effect of press-fitting and biting, thereby generating a certain negative pressure adsorption effect against peeling, which can improve the anti-pumping ability during the high and low temperature cycling process of the work. The increase in compactness and cohesion realizes the improvement of the bonding force of the pre-spreading layer, thus enhancing the integrity of the sheet-like thin layer of the pre-spreading layer. At the same time, with the reduction of filler spacing, the uniformity of filler spacing, and the re-distribution of the skeleton structure of large and small fillers, the thermal conductivity, cohesion, compactness, adhesion, and resilience of the pre-spreading layer are all improved, and the top surface of the pre-spreading layer shows a certain smoothness and reflectivity. As a result, the running-in period can be expected and shortened, the attenuation slows down, and the thermal performance and durability are improved.

[0053] In some other embodiments of the present application, the finger-pinching roller is applied in the fields of beauty care massage, medicine and healthcare, stationery or chemical industry. The finger-pinching roller includes a roller body, a finger-pinching part and a connecting part. Preferably, the outer surface or the housing of the roller body is made of a flexible material or an adsorbent material. Preferably, consumables such as cosmetics, drugs or coatings are coated on the outer surface of the roller as a new housing or working surface. Optionally, the shape of the roller body is a cylinder-like shape, including but not limited to a spindle shape or a dumbbell shape. Optionally, processes such as engraving, etching, printing, electroplating, electroless plating, machining, photolithography, heat transfer printing, decal, 3D printing, etc. are used on the outer surface of the roller body or the new housing to form a specific pattern.

[0054] In some other embodiments of the present application, the finger-pinching roller further includes a wiping part. The wiping part includes a wiping tool and / or an attachment. The wiping tool is a material or component for removing substances adsorbed on the surface of the roller or making the adsorbed substances evenly distributed. The attachment is a consumable with a specific function adsorbed on the surface of the roller or the wiping tool through physical or chemical action. The wiping tool includes but is not limited to cotton cloth, non-woven fabric, microfiber cloth, paper towel, sponge, brush, scraper or animal fur, etc.; the attachment includes but is not limited to cleaning agent, alcohol, disinfectant, coating, oil, cosmetics, health products or drugs, etc.

[0055] In the description of the present application, it should be understood that the terms "first", "second", "one", "two" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "one", "two" may explicitly or implicitly include at least one of the features.

[0056] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "surface", "side", "inner", "outer", "axial", "radial", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0057] In addition, in the present application, unless otherwise clearly specified and defined, the terms "connection", "coupling", etc. should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A finger-pinching roller, characterized in that, The described finger-pinching roller comprises: A roller body having a cylindrical outer surface for smearing and / or rolling; Two finger-pinching parts and their connecting part, the connecting part being an integral part penetrating the axial direction of the roller or two independent parts coupled to the axial direction of the roller; the finger-pinching parts are configured as parts coupled to the connecting part and extending axially outward of the roller, for two fingers to relatively pinch the two finger-pinching parts and push the roller to move around the axis.

2. The pinching roller according to claim 1, wherein It further comprises: The roller locally further has a shape change, including diameter change, fillet or chamfer; and / or, the outer surface of the roller is subjected to physical and / or chemical treatment, including grinding, polishing, coating, plating or modification; and / or, a housing is further coupled outside the roller body as a new outer surface or protective layer; and / or, the roller body is replaced by a quasi-cylindrical body, the quasi-cylindrical body including a spindle body or a dumbbell body.

3. The finger pinching roller according to claim 1 or 2, characterized in that, The connection form of the connecting part includes one or more combinations of bearing connection, hinge connection, ball-and-socket connection, pin connection, sliding connection, fixed connection.

4. The pinching roller according to claim 3, characterized in that, The finger-pinching part further has a plate-shaped end for the finger pulp to be attached and apply pressure and friction.

5. A finger-pinching roller as described in any one of claims 1 to 4, characterized in that, It further comprises a wiping part, the wiping part comprising a wiping tool and / or an attachment, the wiping tool being a material or component for removing substances adsorbed on the surface of the roller or making the adsorbed substances evenly distributed, and the attachment being a consumable with a specific function adsorbed on the surface of the roller or the wiping tool through physical or chemical action.

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