A new hand-held roller tool

Abstract

The application provides a novel handheld roller tool based on a multilayer nested structure and ingeniously introducing a ball bearing (or a magnetic suspension bearing or an outer spherical surface bearing) and its unique structural features, so that a first finger pinch part is formed based on an inner ring, a second finger pinch part is formed based on a shaft pin, or a third finger pinch part is formed based on a plug shaft coupled to the inner ring, and the like, which can better perform paste spreading or rolling work, especially fine spreading of heat-conducting paste on target surfaces such as small-size chip bare silicon wafers and large-size chip copper covers, and has better structural functional reliability, human-computer interaction optimization, flexible selection and matching, appearance richness, interestingness and cost controllability. The multilayer nested structure can adjust the use amount of materials of the outer sleeve layer, and the ball bearing (or the magnetic suspension bearing) can significantly reduce the starting resistance and the running resistance, especially the smaller starting resistance is more beneficial to the anti-slip of the paste such as heat-conducting paste when the spreading layer of the paste is thin.

Description

Technical Field

[0001] This application relates to the field of handheld roller tools, and more particularly to a novel handheld roller tool. Technical Background

[0002] Existing technologies have made various attempts to improve the functionality of handheld rollers in the field of applying or pressing ointments.

[0003] For example, Patent Document 1 discloses a finger-operated roller tool and its method of use, including a roller body, a connecting part, and a finger-pinching part. By constructing two relatively independent finger-pinching parts, the driving method of the roller body is improved by having two fingers pinch one finger-pinching part on each side of the roller body to shape the roller body's rolling motion. Its applications include applying and / or pressing substances such as pastes, and it is particularly suitable for scenarios with small working ranges and forces, offering advantages such as dexterity, increased efficiency, material savings, cost reduction, space saving, and high robustness. This improvement can be applied to various fields, such as the application of thermal paste. Its working principle is as follows: At the macroscopic level, the scraper obtains sliding friction and shear slip force through a "push-pull" motion. Excessive shear slip force can cause negative problems, such as fraying and peeling. Simultaneously, sliding friction depends on the contact area and coefficient of friction, and for highly viscous thermal pastes, more material tends to adhere upon removal. At the microscopic level, shear stress can only cause the solid particles in the dispersed phase to spread horizontally, but cannot achieve a denser effect. In contrast, the roller obtains rolling friction and vertical pressure through repeated rolling. Due to its lower friction, higher pressure, and high-frequency repetitive operation, it reduces the negative effects of shear force while increasing the compaction effect of pressure. The effect of vertical pressure on horizontal thinning during spreading can be explained using the Poisson effect (lateral deformation effect) in plasticity mechanics. Patent document 1 is cited in its entirety in this disclosure.

[0004] Patent Document 2 discloses a pre-spreading tool, particularly for thermal paste, featuring a cylindrical, smooth outer working surface. This tool represents an improvement upon the bending deformation created by pressure applied to the blade of a scraper, resulting in a cylindrical, smooth outer working surface. Repeated rolling on this surface achieves a low-disturbance foundation and a highly repeatable rolling friction method for pre-spreading the thermal paste. Based on this low-disturbance foundation, the thixotropic properties of the thermal paste are fully utilized to adjust the dispersed phase structure within, on the top and bottom surfaces of the paste. This allows the thermal paste to achieve highly continuous, stable, and robust adjustments to the dispersed phase structure under the influence of its own thixotropic properties, resulting in a rolled layer with even better properties after each subsequent rolling. This rolling method improves the efficiency, quality, and robustness of thermal paste application. Patent Document 2 is incorporated herein by reference in its entirety.

[0005] Patent Document 3 discloses a relatively non-stick geometric structure suitable for spreading pastes. By constructing a curved surface (especially a sphere) with defined curvature characteristics as the working surface, it exhibits stronger non-stick properties compared to spreading tools of the same material (such as cylindrical rollers or scrapers) when applied to the paste by pressing and / or rolling. This structure is mainly used for the initial spreading of pastes. After initial rolling, the paste is locally leveled, compacted, and initially adheres to the target surface. Then, the final rolling can be easily and efficiently completed by using a cylindrical roller. Patent Document 3 is incorporated herein by reference in its entirety.

[0006] In addition, some handheld roller technologies are being improved towards intelligent upgrades, such as setting up a real-time compaction feedback system; or towards environmentally friendly designs, such as being biodegradable.

[0007] Reference list:

[0008] Patent documents:

[0009] Patent Document 1: Chinese Patent Application Publication CN119056705A;

[0010] Patent Document 2: Chinese Patent Application Publication CN119140384A;

[0011] Patent document 3: Chinese patent application publication CN119608482A. Utility Model Content

[0012] The problem this application aims to solve

[0013] However, the roller body described in Patent Document 1, the cylindrical smooth outer surface of the working surface described in Patent Document 2, and the relatively non-sticky geometry described in Patent Document 3 all significantly improve the efficiency and quality of thermal paste application, for example. However, these patent documents focus on the adverse effects of the thermal paste's viscosity and adhesion during application. Other potential coupling factors, such as those between the roller body and the operating part, have not been thoroughly investigated or fully considered.

[0014] This disclosure was made in view of the above-mentioned problems, and the purpose of this disclosure is to provide a preferred coupling factor between the roller body and the operating part to form a synergistic effect, so as to achieve better results in the application of pastes such as thermal pastes.

[0015] Solution to the problem

[0016] This disclosure is made to solve the above-mentioned problems and provides a novel handheld roller tool, characterized by adopting a multi-layer nested structure, the multi-layer nested structure including an outer layer and a ball bearing inside the outer layer; and the ball bearing has an inner ring, the left and right ends of the inner ring can serve as a recessed first pinch part, or the ball bearing has a pin, the left and right ends of the pin can serve as a second pinch part.

[0017] In some embodiments, the novel handheld roller tool is characterized by further comprising: the outer sleeve being composed of an adhesive layer or a plastic layer, or the outer sleeve being composed of the outer ring of the ball bearing, or the outer sleeve being fitted onto the outside of the ball bearing.

[0018] Optionally, the novel handheld roller tool is characterized in that: the outer shell layer is composed of a plastic coating layer, wherein the plastic coating layer is made of polytetrafluoroethylene, PP or POM material, and is disposed outside a steel ball bearing; or, the outer shell layer is sleeved outside the ball bearing, and the sleeve is formed by a retaining spring.

[0019] In some embodiments, the novel handheld roller tool is characterized by further comprising: the outer shell being made of polytetrafluoroethylene, perfluoroethylene propylene, perfluoroalkoxy resin, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, high-density polyethylene, PP, or POM; or, the outer shell being made of a fluorinated polymer or a fluorinated composite material; and / or, the balls in the ball bearing being ball rollers, cylindrical rollers, or tapered rollers; and / or, the balls in the ball bearing being made of plastic, ceramic, glass, or metal; and / or, the ball bearing further comprising a cage and / or a seal.

[0020] In other embodiments, the novel handheld roller tool is characterized by further comprising: an insert shaft coupled to the inner ring; the insert shaft is configured to be coupled to the inner ring in a plug-in manner, such that the left and right ends of the insert shaft can serve as a third finger pinch portion, or at least one of the left and right ends of the insert shaft can be used to connect to a handle.

[0021] Optionally, the novel handheld roller tool is characterized by further comprising:

[0022] The insertion method is configured as a second fixed connection, and the second fixed connection includes a non-detachable connection or a detachable connection; or, the insertion method is configured as a radially tight plug connection between the insertion shaft and the inner ring; and / or, the left and right ends of the insertion shaft are respectively configured as a left extension end for pinching and a right extension end for pinching; and / or, a washer or spring is further included between the insertion shaft and the inner ring.

[0023] Furthermore, the novel handheld roller tool is characterized in that the left and right ends of the insert shaft are respectively configured as a left extended end for gripping and a right extended end for gripping, and further includes:

[0024] The right end of the insert shaft is configured to connect to a pinching structure, which constitutes the right extension end. The right end of the insert shaft and the pinching structure are configured for a detachable connection, which may include a bolted connection, a plug-in connection, an adhesive connection, a snap-fit ​​connection, or a magnetic connection; or...

[0025] The insert shaft includes a first sub-insert shaft and a second sub-insert shaft, wherein the left end of the first sub-insert shaft is configured as the left extension end, the right end of the second sub-insert shaft is configured as the right extension end, and the right end of the first sub-insert shaft is inserted into the left port of the inner ring, and the left end of the second sub-insert shaft is inserted into the right port of the inner ring.

[0026] Optionally, the novel handheld roller tool is characterized in that the left and right ends of the insert shaft can serve as third finger gripping portions, and further includes:

[0027] The left and right ends are configured to have a surface treatment, which includes plating, coating, or engraving texture, thereby increasing skin-friendliness, friction, and visual appeal; or,

[0028] The left and right ends are configured to have a sticker, a cap, or a cover inserted; the sticker, the cap, or the cover can serve as a fourth pinch part.

[0029] In another embodiment, the novel handheld roller tool is characterized in that the left and right ports of the inner ring are respectively fixedly connected to a first extension structure, and the outer end of the first extension structure can serve as a fifth finger pinch portion; or, the left and right ends of the shaft pin are respectively fixedly connected to a second extension structure, and the outer end of the second extension structure can serve as a sixth finger pinch portion; or, the inner ring is further configured to include an end plug, the end plug being coupled to the left port and / or right port of the inner ring in an insert manner, and the outer end of the end plug can serve as a seventh finger pinch portion.

[0030] Optionally, the novel handheld roller tool is characterized in that the ball bearing is replaced with a magnetic levitation bearing or an outer spherical bearing. Beneficial effects

[0031] The novel handheld roller tool provided in this application is based on a multi-layered nested structure and cleverly incorporates ball bearings (or magnetic levitation bearings) and their unique structural features. For example, the inner ring forms the first pinch area, or a pin forms the second pinch area. This multi-layered nested structure allows for adjustable material usage in the outer layer, thus satisfying the requirement for excellent non-stick properties in pastes (especially thermal pastes) while saving on more expensive materials such as polytetrafluoroethylene (PTFE). Furthermore, it offers superior structural layering and aesthetics, along with the enjoyment of smooth rotation and pressure-relieving effect, resulting in diverse structural designs and user experiences, thereby enriching the product line. Furthermore, ball bearings (or magnetic levitation bearings) have more controllable internal clearance compared to sliding bearings, ensuring that the rotating shaft has higher precision centering and stable rotation. This ensures the smooth and stable operation of the new handheld roller tool and can also significantly reduce starting resistance and running resistance. In particular, lower starting resistance is more beneficial for the spreading of thermal paste, especially when the thermal paste layer is already thin. It can effectively reduce the instantaneous sliding friction that may occur when the roller is started. Instantaneous sliding friction can easily damage (e.g., break) the already thin spreading layer.

[0032] Therefore, it is evident that this novel handheld roller tool utilizes the unique structural characteristics of its outer layer and ball bearings (or magnetic levitation bearings) as optimal coupling factors, resulting in a synergistic effect that enhances the anti-slip properties of pastes (especially thermal pastes). This novel handheld roller tool boasts superior structural reliability, optimized human-machine interface, flexible configuration options, diverse appearances, and controllable costs. It is better suited for tasks such as applying or rolling pastes, particularly for the precise spreading of thermal paste on target surfaces like small-sized exposed silicon wafers and large-sized copper caps. Attached Figure Description

[0033] Figure 1-1 A schematic diagram of the inner ring is shown in some embodiments of the novel handheld roller tool;

[0034] Figure 2-2 A schematic diagram of another structure of the inner ring is shown in some embodiments of the novel handheld roller tool;

[0035] Figure 1-3 A schematic diagram of a structure in some embodiments of the novel handheld roller tool is shown, in which an insert shaft is coupled to the inner ring.

[0036] Figure 1-4A schematic diagram of another structure is shown in some embodiments of the novel handheld roller tool, where the inner ring is coupled with a ferrule;

[0037] Figure 2-1 A schematic diagram of a pin structure is shown in some embodiments of the novel handheld roller tool;

[0038] Figure 2-2 A schematic diagram of another structure of the pivot pin is shown in some embodiments of the novel handheld roller tool;

[0039] Figure 3-1 A schematic diagram of the outer ring structure is shown in some embodiments of the novel handheld roller tool;

[0040] Figure 3-2 A schematic diagram of another structure of the outer ring is shown in some embodiments of the novel handheld roller tool;

[0041] Figure 4-1 A schematic diagram of a retaining spring is shown in some embodiments of the novel handheld roller tool;

[0042] Figure 5-1 A schematic diagram of the end plug is shown in some embodiments of the novel handheld roller tool;

[0043] Figure 6-1 A schematic diagram of the outer spherical surface is shown in some embodiments of the novel handheld roller tool.

[0044] Reference numerals: 11 - outer jacket; 12 - ball bearing; 120 - ball; dashed line - indicates axis;

[0045] 121 - Inner ring, and its 121a - Left port, 121b - Right port;

[0046] 13-Insertion shaft, and its 131a-left end, 131b-right end, 131c-circumferential groove;

[0047] 122 - the pivot pin, and its 122a - left end; 122b - right end;

[0048] 14-Snap ring; 15-End plug, and its 151a-Left end and 151b-Right end. Detailed Implementation

[0049] To make the objectives, technical solutions, and beneficial effects of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the described embodiments are merely some embodiments of this application, not all embodiments. The specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other, especially features that do not necessarily depend on each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0051] In the embodiment of the novel handheld roller tool of this application, the outer surface of the outer jacket layer (or outer jacket body) is configured for rolling on the target surface. It should be noted that the outer jacket layer (or outer jacket body) can be layered but does not necessarily have to be layered, referring to the outermost structure in a multi-layered nested structure, and there may or may not be an intermediate layer between the outer jacket layer and the ball bearing.

[0052] In a first embodiment of this application, the outer layer is composed of an overmolded layer or a plastic-coated layer. For example, the outer layer can be made on the outside of the ball bearing using a conventional overmolding process. Preferably, the outer layer has an outer cylindrical surface and is specially treated (e.g., sandblasting, grooving) to increase the bonding strength with the outer layer (e.g., the overmolded layer or the plastic-coated layer). The shape of the outer layer can be constrained by the mold shape of the process. The difference between the overmolded layer and the plastic-coated layer is that the overmolded layer can have some elasticity or significant elasticity (e.g., soft plastic material), such as polyurethane, while the plastic-coated layer may have no elasticity or only a small amount of elasticity (e.g., hard plastic), where elasticity is relative to soft or hard plastic. In some examples, the ball bearing is embedded in the overmolded layer (or the plastic-coated layer). In other examples, the ball bearing is embedded in the overmolded layer (or the plastic-coated layer) and cannot be removed. In other examples, the corners of the outer surface of the outer jacket are configured with rounded or chamfered edges. This helps to avoid creating tracks on the thermal paste spreader, resulting in a more efficient acquisition of a smooth and uniformly thick thermal paste spreader. In still other examples, the width of the outer jacket is greater than the width of the ball bearing, or the width of the outer jacket is equal to or less than the width of the ball bearing.

[0053] Its advantages are that the outer layer, made of a rubber (or plastic) coating, can increase the bonding force with the ball bearing (such as the outer surface), forming sufficient nested structural stability, thus eliminating the need for additional components (such as adhesive or snap rings) to strengthen the connection. Furthermore, the outer layer can achieve better adjustability in thickness, shape, and amount. In addition, the ball bearing occupies a certain volume space, which is particularly beneficial for saving on materials such as polytetrafluoroethylene (PTFE), which has good non-stick properties but is more expensive. This ensures that, for example, there is no need to prepare a solid PTFE cylinder and then form a sliding bearing (shaft hole) through the axis.

[0054] Inner Ring Implementation Example 1: Implementation Method for the Left and Right Ports of the Inner Ring

[0055] In this application, the inner ring may have a central through hole, or it may have recessed cavities at the left and right ends (but the two recessed cavities are not connected), etc. The cross-section of the central through hole may be circular, square, polygonal, cross-shaped, or any other arbitrary shape. The cross-section of the recessed cavity may also be circular, square, polygonal, cross-shaped, or any other arbitrary shape. In some embodiments, the inner ring has left and right ports, which can then serve as recessed first finger pinch portions, respectively.

[0056] The advantage is that the diameter of the central through-hole of the inner ring is adjustable, especially if it can be set to be larger, which in turn allows for adjustable thickness of the outer layer (especially if it can be set to be thinner to save material). However, this is disadvantageous for sliding friction or bearings. If the diameter of the shaft hole for friction rotation is set to be larger, similar to the central through-hole of the inner ring, the friction contact area of ​​the shaft will be larger, resulting in greater friction (especially starting resistance) during manual operation, which can easily break through the thin layer of paste (especially thermal paste).

[0057] Please refer to Figure 1-1 The diagram illustrates a structural schematic of the inner ring in some embodiments of this application. For example... Figure 1-1 As shown, the device includes an outer shell 11; balls 120 in a ball bearing 12; and left ports 121a and right ports 121b of the inner ring 121 in the ball bearing 12. The dashed lines represent the axis. Optionally, the ball bearing 12 is embedded within the outer shell 11. Optionally, the outer corners of the outer shell 11 are configured with rounded corners to avoid creating ruts when the outer shell 11 is applied, such as as a thermal paste spreader. This allows the left and right ports of the inner ring to serve as recessed first pinch-type portions.

[0058] Please refer to Figure 1-2 This illustrates another structural schematic diagram of the inner ring in some embodiments of this application. For example... Figure 1-2As shown, the device includes an outer sleeve 11, balls 120 in a ball bearing 12, and the left port 121a and right port 121b of the inner ring 121 in the ball bearing 12. The dashed line represents the axis. The outer sleeve 11 has a second width (or a larger width, meaning greater than the first width), thus employing two sets of balls distributed on the left and right sides of the outer sleeve 11 to work together to ensure higher precision centering and stable rotation of the rotating shaft. This ensures smooth operation and stable, non-eccentric operation of the new handheld roller tool, and significantly reduces starting and running resistance. Lower starting resistance is particularly beneficial for spreading thermal paste, especially when the thermal paste layer is already thin. This effectively reduces the instantaneous sliding friction that may occur during roller startup, which can easily damage (e.g., break) the already thin layer. Optionally, the outer sleeve 11 is embedded within the ball bearing 12. Optionally, the outer corners of the outer layer 11 are configured with rounded corners to avoid creating ruts when the outer layer 11 is applied to a layer such as a thermal paste spreader. This allows the left and right ports of the inner ring to serve as recessed first pinch-type portions.

[0059] Inner ring embodiment two: Insertion shaft is inserted into the inner ring and its left and right ends.

[0060] In this application, the inner ring has a central through hole, and a plug-in shaft is coupled to the central through hole. The plug-in shaft has left and right ends. Preferably, the plug-in connection constitutes a fixed connection. Preferably, the left and right ends of the plug-in shaft are located outside the left and right sides of the inner ring, thereby forming a protruding structure, for example, beyond the inner circumference of the inner ring or the inner circumference of the outer layer. For example, the protruding structure is columnar and forms an extension end (such as a left extension end and a right extension end) at its outer end, so as to facilitate finger pinching.

[0061] Its advantage is that the left and right ends of the connector can serve as new finger grips (third finger grips). Furthermore, the length of the connector allows for a preliminary ergonomic grip between two fingers, which is particularly advantageous for gripping new handheld roller tools with narrower (e.g., 8-12mm) outer sheaths. These narrower-width handheld roller tools are primarily used for CPU dies in laptops, which typically have smaller dimensions and areas, thus providing better adaptability.

[0062] Optionally, the insertion method of the insert shaft can be configured as a detachable connection or a non-detachable connection. The detachable connection is, for example, a bolt connection, preferably with the insert shaft having a screw structure and an inner ring having a nut structure; the non-detachable connection is, for example, a spring pin fixed connection, preferably with the spring pin fixed to the insert shaft and the insert shaft having a matching insert slot for the spring pin. When the spring pin is set to have a chamfered or other removable structure, a detachable connection can be achieved.

[0063] Optionally, the insert shaft and the inner ring are configured with an elastic clamping structure to form a radial clamping and thus prevent loosening. For example, the elastic clamping structure can be configured as a separate piece or fixedly connected to the outer circumferential wall of the insert shaft, so that it elastically deforms to form a radial clamping when inserted into the inner ring.

[0064] Optionally, the outer layer can also be configured as a single layer or a composite layer. Preferably, the outermost layer of the composite layer is made of a highly non-stick material such as polytetrafluoroethylene (PTFE), achieved, for example, by overlaying with adhesive, attaching tape to the outer surface of a core, or fitting a film loop onto the outer surface of a core. The tape or film loop is made of a highly non-stick material such as PTFE, and the film loop is a tape loop (i.e., the inner surface has an adhesive layer).

[0065] Optionally, the left and right ends of the insert shaft may also be configured to have a sticker, a cap, or a cover. For example, the sticker may be a skin-friendly material such as a film, sticker, or transferred pattern. Its advantage is that, for example, if the insert shaft is made of metal, the sticker achieves a skin-friendly effect different from that of metal materials. Especially when the outer surface (or inner layer) of the sticker has a pattern, it can provide a rich variety of patterns, thus forming a diverse range of products. The cap may be made of the same skin-friendly material as the sticker and may display a rich variety of patterns. Furthermore, the cap or cover constitutes a possible preferred quick-connect method; other quick-connect methods that are equivalent or similar are also within the scope of this application. The cap or cover, for example, has an insertable end configured to insert into a recessed cavity provided on the side of the insert shaft. The cap or cover may be, for example, generally similar in shape to a thumbtack. Its advantage is that the additional sticker, cap, or cover provided on the left and right ends of the insert shaft can serve as a fourth pinch part.

[0066] Please refer to Figure 1-3 This illustrates a schematic diagram of a structure in some embodiments of this application where the inner ring is coupled with an insert shaft. For example... Figure 1-3 As shown, the structure includes an outer layer 11, balls 120 in a ball bearing 12, and an inner ring 121; it also includes a left end 131a and a right end 131b of an additional insert shaft 13 (inserted into the inner ring 121), with the dashed lines representing the axis. The outer layer 11 is configured to have a first width (or small width), and the balls 120 are configured as a set. Thus, the left and right ends of the insert shaft can serve as a third finger gripping portion.

[0067] Optionally, such as Figure 1-3In the middle, the left end portion 131a and the right end portion 131b can be planar (e.g., flat), concave (e.g., concave surface), or convex (e.g., convex surface), or have anti-slip textures or anti-slip dots (e.g., an array of dots on the end face). The planar surface, for example, an upward-facing and inclined planar surface, allows for more favorable downward pressure application. The concave surface, for example, as shown by the dotted arc segment in the figure, is beneficial in enhancing the gripping part's anti-slip properties and achieving more favorable downward pressure application. Furthermore, optionally, the outer edges of the left end portion 131a and the right end portion 131b have rounded or chamfered edges for better gripping. Optionally, the insert shaft 13 can be a straight axis with a uniform cross-section, and the cross-sectional shape can be circular, square, cross-shaped or other shapes (the central through hole of the inner ring can be of a uniform shape or a non-uniform shape), and both ends can be inserted into the inner ring 121; or, the left end 131a and the right end 131b can be configured as extended ends for more favorable gripping.

[0068] Alternatively, in Figure 1-3 In the middle, at least one of the left end portion 131a and the right end portion 132b has a liner, a cap or a cover, and thus its outer end face can serve as a fourth finger pinch portion.

[0069] Alternatively, in Figure 1-3 In addition to having a straight axis and a uniform cross-sectional diameter, the insertion shaft 13 can also have circumferential grooves 131c provided on the inner side of the left end 131a and the right end 132b. The advantage of this is that both ends of the insertion shaft 13 can be inserted into the inner ring 121 after insertion, and another type of extension end similar to the above-mentioned extension end can be obtained.

[0070] It should be noted that the left and right ends of the insert shaft are respectively configured as a left extension end for gripping and a right extension end for gripping, wherein both the left and right extension ends constitute extension ends. The extension ends are configured to provide the necessary contact area with the fingers, thereby making the gripping part more ergonomic. For example, the extension end can be larger than the middle section of the insert shaft. If the diameter of the middle section of the insert shaft is too small, the cross-sectional area of ​​the extension end can be larger than that of the middle section of the insert shaft to form a full fit with the fingers, which is more conducive to applying pushing force and pressure to the new handheld roller tool. In addition, the extension end can be an extension form that is integral with the middle section of the insert shaft (e.g., one-piece molding or welded integral form), or it can be a detachable extension form (e.g., nut structure or plug cap form), or it can have an circumferential groove on the inner side of the extension end, which constitutes an extension form relative to the circumferential groove (e.g., in this case, the comparison of the cross-sectional area of ​​the extension end and the middle section is no longer considered).

[0071] It should be added that the extension end can be coupled to the finger-gripping portion in this application, such as the left and right sides of the insert shaft, the protruding side of the pin, and the left and right sides of the end plug described below. The extension end can cover the gaps between the layers (or rings) of the ball bearing, or cover the balls and / or cage when the ball bearing has no seals (such as sealing rings), or cover part of the outer shell layer, thereby achieving the covering effect on unsealed exposed balls and / or cages (or gaps between the layers or rings of the ball bearing, or gaps between the layers of a multi-layer nested structure), while potentially obtaining a larger finger-gripping surface corresponding to the extension end, which is beneficial for more favorable fit and gripping force. Optionally, the extension end is located within the inner perimeter of the outer shell layer (e.g., the outer side of the extension end does not extend beyond the outer side of the outer shell), or the extension end extends beyond the inner perimeter of the outer shell layer (e.g., the outer side of the extension end extends beyond the outer side of the outer shell).

[0072] Please refer to Figure 1-4 This illustrates another structural schematic diagram of an inner ring coupled with an insert shaft in some embodiments of this application. For example... Figure 1-4 As shown, the structure includes an outer layer 11, and balls 120 and an inner ring 121 in a ball bearing 12; it also includes a left end 131a and a right end 131b of an insert shaft 13 (inserted into the inner ring 121), with the dashed line representing the axis. The outer layer 11 is configured with a second width (or a larger width, greater than the first width), and the balls 120 are configured in two sets. Furthermore, the left end 131a and right end 131b are respectively configured as a left extension end and a right extension end. The right extension end is, for example, a screw connected to the right end of the insert shaft (the rotating shaft), thus enabling, for example, the rotating shaft to be fixedly connected to the inner ring, and the insert shaft with two extension ends to pass through the inner ring. Simultaneously, the use of two sets of balls distributed on the left and right sides of the outer layer 11 works together to ensure higher precision centering and stable rotation of the rotating shaft, which helps prevent slippage during the continuous thinning of the thermal paste layer. Therefore, the left and right ends of the insert shaft can serve as a third finger-grip portion.

[0073] Optionally, in Figure 1-4 In the middle, the left end portion 131a and the right end portion 131b can be planar (e.g., flat), recessed (e.g., concave), or convex (e.g., convex), or have anti-slip textures or anti-slip dots (e.g., an array of dots on the end face). The planar portion, for example, is an upward-facing and inclined planar portion, to facilitate the application of downward pressure. Optionally, at least one of the left end portion 131a and the right end portion 132b has a coating, cap, or cover, so that its outer end face can serve as a fourth finger pinch portion.

[0074] In a modified embodiment of this application, a shim may be included between the insert shaft and the inner ring. The shim can be used to adjust the distance between the insert shaft and the inner ring and to enhance the axial position stability of the insert shaft, and to help form a first distance between the outer end gripping portions of the insert shaft, the first distance being used to obtain a two-finger distance that conforms to ergonomic gripping.

[0075] In addition, the gasket can also be an elastic gasket or a spring to further create radial prestress between the insert shaft and the inner ring, thereby creating radial clamping to further enhance the radial positional stability of the insert shaft, and generating enhanced circumferential friction based on radial clamping to promote better transmission of hand-held force to the inner ring.

[0076] Example 1: Implementation of replacing the inner ring with a pin

[0077] In this application, the inner ring can be replaced by a pivot pin. The pivot pin has left and right ends.

[0078] For example, the axle pin can be a completely solid body (e.g., a circular plate of a certain thickness or a cylindrical rod of a certain length); it can also be a second extension structure connected to the left and right end faces of the completely solid body (and the outer end face of the second extension structure can serve as a second finger pinch part); it can also be a type of axle pin with a recessed cavity at one end and a planar end face (or a convex end face or an end face with a convex dot array), etc.

[0079] It should be noted that the pivot pin in this application, as a substitute for the inner ring plug, also has a functional structure that enables the ball to exert rolling friction (e.g., the ball acts as a rolling element with deep grooves on its outer surface). The difference between the pivot pin and the inner ring is that the inner ring has a central through hole coupled to the axis; the pivot pin does not have a central through hole coupled to the axis, and the left and right sides of the pivot pin can be constructed with a planar, recessed, or protruding second gripping portion (e.g., it can be integrally formed). In addition, the inner ring can have through holes of various shapes other than the central through hole, and the pivot pin can have through holes of various shapes other than the central area where the axis is located. In some pivot pin embodiments, a closed inner ring can be used as a type of pivot pin. The difference between the closed inner ring and other pivot pin structures is that it does not necessarily have a second gripping portion that can be integrally formed, such as the recessed or protruding type mentioned above, and therefore the gripping portion can be configured differently.

[0080] The second pinch portion can be a flat surface, a concave surface, or a convex surface, etc. The flat type, for example, an upward-facing and inclined flat surface, allows for more favorable downward pressure application. In some examples, the pin has left and right end faces that can serve as the second pinch portion. Exemplarily, the outer periphery shape of the cross-section of this end face can be circular, square, polygonal, cross-shaped, or any other arbitrary shape; or the end face can be a flat surface, a concave surface, or a convex surface, etc.

[0081] Please refer to Figure 2-1 The diagram illustrates a structural schematic of a pivot pin in some embodiments of this application. It includes two sub-figures: the left sub-figure is a plan view of the novel handheld roller tool along the axial direction, and the right sub-figure is a plan view of the novel handheld roller tool along the radial direction.

[0082] like Figure 2-1 As shown, the structure includes an outer sleeve 11, balls 120 in a ball bearing 12, and the left end 122a and right end 122b of a pin 122 in the ball bearing 12. The dashed lines represent the axis. The pin 122 serves as the inner liner of the ball bearing 12. The left and right ends of the pin 122 are positioned not to extend beyond the periphery of the outer sleeve 11. The central regions of the left end 122a (if it is the left side) and the right end 122b (if it is the right side) are both configured with a recessed structure (as shown by the dashed circles), which serves as an anti-slip gripping area. Thus, a second gripping area can be formed based on the fact that the left and right ends of the pin do not extend beyond the periphery of the outer sleeve and based on the recessed structures provided on the left and right sides of the pin.

[0083] Please refer to Figure 2-2 This diagram illustrates another structural schematic of the pivot pin in some embodiments of this application. It includes two sub-figures: the left sub-figure is a plan view of the novel handheld roller tool along the axial direction, and the right sub-figure is a plan view of the novel handheld roller tool along the radial direction.

[0084] like Figure 2-2 As shown, the structure includes an outer layer 11, balls 120 in a ball bearing 12, and the left end 122a and right end 122b of a pin 122 in the ball bearing 12. The dashed lines represent the axis. The pin 122 serves as the inner liner of the ball bearing 12. The left and right ends of the pin 122 extend beyond the outer periphery of the outer layer 11. The central regions of both the left end 122a (if it is the left side) and the right end 122b (if it is the right side) are configured with a protruding structure (as shown by the dashed circles), which serves as an extended finger-pinching area. Thus, based on the left and right ends of the pin extending beyond the outer periphery of the outer layer, another second finger-pinching area can be formed, providing a different pinching experience.

[0085] Optionally, in Figure 2-2 In the middle, the outer edges of the left end portion 122a and the right end portion 122b have rounded or chamfered edges. Optionally, the outer edges (e.g., outer surfaces) of the left end portion 122a and the right end portion 122b can be configured as planar (e.g., flat), recessed (e.g., concave), or convex (e.g., convex), or have anti-slip textures or anti-slip dots (e.g., an array of dots on the end face). The planar surface, for example, an upward-facing and inclined planar surface, is more conducive to applying downward pressure.

[0086] In some embodiments, the left and right ports or left and right ends mentioned above may be symmetrical.

[0087] Outer ring embodiment 1: Outer ring configured as outer jacket layer implementation

[0088] In the second embodiment of this application, the outer layer is formed by the outer ring of the ball bearing (i.e., the outer ring is directly configured as the outer layer). The advantage of this is that, in this novel hand-held roller tool, the outer ring of the ball bearing constitutes the outer layer capable of acting on the target surface, without the need for an additional outer layer outside the outer ring as in other embodiments. This eliminates the need to consider, for example, the problem of increasing the bonding force with the ball bearing (such as the outer surface) when the outer layer is composed of a rubber (or plastic) coating.

[0089] This demonstrates that the overall structure can be made simpler and more concise. The multi-layer nesting can be achieved by defaulting on the outer layer, resulting in fewer components, fewer processes, simpler processes, and lower requirements for manufacturing technology, thus leading to higher yield, lower cost, and better energy saving and emission reduction effects.

[0090] In one example, the outer layer consists of an outer ring and has a first width (or the outer layer has a small width), and there is a set of balls. Please refer to [reference needed]. Figure 3-1 The diagram illustrates a structural schematic of the outer ring in some embodiments of this application. It includes two sub-figures: the left sub-figure is a plan view of the novel handheld roller tool along the axial direction, and the right sub-figure is a plan view of the novel handheld roller tool along the radial direction.

[0091] like Figure 3-1 As shown, the structure includes an outer sleeve 11 (with a narrow width), a set of balls 120 in a ball bearing 12, an inner ring 121, and a left port 121a and a right port 121b of the inner ring 121. The dashed lines represent the axis. For example, the outer sleeve 11 is configured as the outer sleeve (or liner) of the ball bearing 12. It is evident that the overall structure becomes simpler with a narrow outer sleeve 11 for a set of balls. Thus, for example, the left and right ports of the inner ring can function as recessed first finger grips, or they can also be combined with inserts (or end plugs) to function.

[0092] In another example, the outer casing is composed of an outer ring and has a second width (or the outer casing has a large width), and there are two or more sets of balls. The second width is greater than the first width. The two or more sets of balls together ensure higher precision centering and stable rotation of the rotating shaft when the second width is wider. The two sets of balls can be used side-by-side or spaced apart. Please refer to [reference needed]. Figure 3-2 The diagram illustrates another structural schematic of the outer ring in some embodiments of this application. It includes two sub-figures: the left sub-figure is a plan view of the novel handheld roller tool along the axial direction, and the right sub-figure is a plan view of the novel handheld roller tool along the radial direction.

[0093] like Figure 3-2 As shown, it includes an outer sleeve 11 (with a large width), two sets of balls 120 in the ball bearing 12, and an inner ring 121. The dashed line represents the axis. For example, the outer sleeve 11 is configured as the outer sleeve (or liner) of the ball bearing 12. It can be seen that with the large-width outer sleeve 11 for the double sets of balls, the overall structure becomes simpler, especially since the strong bonding force required by the optional rubber (or plastic) coating method in the first embodiment described above is not needed, and the retaining ring optional in the third embodiment described below is also not needed. Thus, for example, the left and right ports based on the inner ring can be used as recessed first pinch parts to achieve operation, or it can also be combined with the insert shaft (or end plug), etc.

[0094] In another example, the outer shell is made of PP, POM, or PTFE; alternatively, the ball bearing is made of plastic, glass, ceramic, or metal, and / or the inner ring is made of plastic, glass, ceramic, or metal. Optionally, the outer or inner shell can be manufactured by injection molding or machining. The advantage is that PP, POM, or PTFE materials all have low non-stick properties. This is particularly advantageous for saving on materials with excellent non-stick properties but higher costs, such as PTFE.

[0095] In another example, the outer ring can have a through hole of any shape. For example, the through hole can be directly provided on the outer ring, or an outer ring with the through hole can be nested outside the outer ring (the outer ring is connected to the outer jacket layer, and the outer ring can be regarded as the aforementioned intermediate layer). This not only achieves the basic function of the outer ring engaging in rolling friction, but also obtains a richer and more diverse multi-layered nested structure.

[0096] In the third embodiment of this application, the outer sleeve is fitted onto the outside of the ball bearing. Optionally, the outer sleeve is snap-fitted onto the outside of the ball bearing. In one example, the snap-fit ​​is achieved by a retaining spring. Optionally, the outer or inner sleeve can be made by injection molding or machining. In one example, the left port of the outer sleeve can be pushed into the ball bearing, and after the ball bearing is pushed into the inner space near the outer sleeve, it cannot be pushed out from the right port of the outer sleeve. The retaining spring, as a connecting component between the outer sleeve and the ball bearing, is configured to be located at the left port of the outer sleeve and on the left side of the ball bearing. During operation, the retaining spring is clamped between the left side of the outer sleeve (a portion) and the right side of the ball bearing (a portion) to lock the ball bearing. Please refer to... Figure 4-1 The diagram shows a structural schematic of a retaining ring in some embodiments of this application.

[0097] like Figure 4-1As shown, the structure includes an outer shell 11, a set of balls 120 in a ball bearing 12, an inner ring 121, and a retaining ring 14. The dashed line represents the axis. The retaining ring 14 is sandwiched between the outer shell 11 and the ball bearing 12 to hold the ball bearing 12 in place and prevent it from dislodging from its port. The dashed line in the figure shows the perspective view of the portion of the retaining ring 14 covered by the outer shell. It should be noted that the indicator line for the ball bearing 12 specifically indicates its outer ring (and its inner ring 121 and balls 120). The ball bearing 12 also includes at least the inner ring 121 and balls 120. Therefore, it can operate based on, for example, the left and right ports of the inner ring serving as recessed first gripping portions, or it can also operate in conjunction with a insert (or end plug).

[0098] In the fourth embodiment of this application, the inner ring further includes an end plug configured to be inserted into the left and / or right ports of the inner ring. Furthermore, the outer end of the end plug can serve as a seventh pinch portion. Exemplarily, there may be one or two end plugs. For example, there may be one end plug configured to be inserted into the left or right port of the inner ring, with the uninserted port serving as a recessed first pinch portion; or there may be two end plugs configured to be inserted into the left and right ports of the inner ring, respectively. Preferably, the end plug is made of a flexible material. For example, silicone or rubber is used, as flexible materials facilitate interference fitting. Optionally, the end plug may also be made of rigid plastic, which also has a certain interference fitting performance. Optionally, the insertion end of the end plug is configured as a two-pronged or three-pronged (or tubular or corrugated surface) for better insertion or tightness. It should also be noted that the end plug may have the aforementioned extended end, for example, the outer end of the end plug may constitute an extended end, the extended end may cover the gap between the layers (or rings) of the ball bearing, or cover the balls and / or cage when the ball bearing has no seal (such as a sealing ring); and optionally, the extended end is located in the inner periphery of the outer layer, for example, the outer side of the extended end does not extend beyond the outer side of the outer layer.

[0099] Please refer to Figure 5-1 The diagram shows a structural schematic of an end plug in some embodiments of this application. For example... Figure 5-1As shown, the structure includes an outer sleeve 11, a set of balls 120 and an inner ring 121 in a ball bearing 12, and two end plugs 15, including the left end 151a and right end 151b of the two end plugs 15. The dashed lines represent the axis. The inner ends of the two end plugs 15 may not contact each other. The dashed lines in the figure show the tubular perspective structure of the insertion section of the end plugs. It should be noted that the outer sleeve 11 is configured as the outer ring (or liner) of the ball bearing 12, which makes the overall structure simpler and uses less material. Optionally, the inner ends of the two end plugs 15 may also contact each other. This allows the two end plugs to function as a seventh finger gripper, or the left and right ports of the inner ring after the two end plugs are pulled out to function as recessed first finger grippers, or they may also function in conjunction with a shaft (or end plug).

[0100] Optionally, the outer side of the end plug 15 may be flat (such as a flat surface facing upward and inclined), recessed, or protruding. The outer side of the end plug 15 (such as the outer surface) may also have anti-slip textures, protrusions, grooves, or depressions to achieve anti-slip and to facilitate the application of downward pressure.

[0101] It should also be noted and supplemented that, in some embodiments of this application, the ball bearing has an outer liner (e.g., an outer ring), an inner liner (e.g., an inner ring, or the inner ring may be replaced by a pin), and a ball (i.e., a rolling element) disposed between the outer liner and the inner liner. Optionally, the outer surface of the inner liner has a continuous arcuate deep groove raceway, and the inner surface of the outer liner has a continuous arcuate deep groove raceway. One continuous arcuate deep groove raceway corresponds to a group of balls.

[0102] Optionally, the outer surface of the liner has a continuous arc-shaped deep groove raceway, which can be one or more. One example is a single raceway distributed in the middle of the liner, thus coupling with a narrow (e.g., 10 to 15 mm wide) outer layer. Another example is two raceways located on the left and right sides respectively, thus enabling the wide (e.g., 20 to 40 mm wide) outer layer to form stable rolling, jointly ensuring higher precision centering and stable rotation of the rotating shaft. This ensures smooth and stable operation of the new handheld roller tool and significantly reduces starting and running resistance, for example, preferably adapted to an embodiment where the outer layer is composed of the outer ring of a ball bearing.

[0103] In one example, the width of the ball bearing is smaller than the width of the outer shell, and the ball bearing is located inside the outer shell.

[0104] In another example, as described above, the outer ring is configured as an outer sleeve, where the outer ring serves as an outer liner, and the outer liner is configured as an inner tube of a certain length; the inner ring serves as an inner liner, and the inner liner is configured as an outer tube of a certain length, with the outer tube directly configured as an outer sleeve acting on the target surface. It can be seen that the inner and outer liners form a double-tube nesting structure, which, combined with ball bearings, constitutes a new type of handheld roller tool with a simpler structure and lower cost.

[0105] In some embodiments of this application, the magnetic levitation bearing has an outer liner (e.g., an outer ring) and an inner liner (e.g., an inner ring or replacing the inner ring with a pin).

[0106] In some embodiments of this application, the spherical bearing has an outer liner (e.g., an outer ring), an inner liner (e.g., an inner ring or replacing the inner ring with a pin), and rolling elements (e.g., balls). Optionally, the outer ring has a spherical or arcuate surface. Preferably, the outer ring has a spherical surface. In one example, the outer surface of the outer jacket is spherical, which has the advantage of providing structural non-stick properties and can serve as a preliminary spreading tool for materials such as thermal paste. Please refer to... Figure 6-1 The diagram shows a structural schematic of the outer sphere in some embodiments of this application.

[0107] like Figure 6-1 As shown, the structure includes an outer shell 11 (with an outer spherical surface), a set of balls 120, an inner ring 121, and an outer ring 123 in a ball bearing 12, and a shaft 13 with its left end 131a and right end 131b. The dashed lines represent the axis. The ball bearing 12 forms a spherical bearing structure as a rolling function. The right end 131b is configured as a nut and bolted to a screw portion at the top of the shaft 13. This allows operation based on, for example, the left and right ends of the inner ring serving as recessed first gripping portions, or it can also operate in conjunction with the shaft (or end plug).

[0108] Alternatively, the outer spherical roller bearing may not have a seal ring; however, it may also have a seal ring (such as a rubber seal ring or a metal seal ring). The seal ring is embedded in deep grooves on both sides of the outer ring, forming a radial contact seal. The seal ring is in close contact with the rotating surface of the inner ring (sometimes with a slight gap) to form an effective sealing barrier, preventing external dust, water, and impurities from entering the bearing and avoiding internal damage (such as poor rotation). This can lead to problems such as poor spreading of thermal paste, especially when the thermal paste layer is already thin. It also effectively reduces the instantaneous sliding friction that may occur during roller startup, which can easily damage (e.g., break) the already thin spread layer.

[0109] Compared to spherical roller bearings, the ball bearing in this application has a cylindrical outer ring. The spherical surface of the outer ring provides better non-stick properties than a cylindrical surface, even with the same material. Therefore, the novel hand-held roller tool with a spherical surface, due to its combination of material and structural non-stick properties, can be used for initial spreading, for example, thermal paste. The novel hand-held roller tool with a cylindrical surface, because it is linearly tangent to the target surface such as a chip, has higher spreading and thinning efficiency, and results in a smoother and more uniform spread layer.

[0110] In some preferred embodiments, the ball bearing is made of metal, and the outer shell is made of plastic. This outer shell is advantageous for preventing scratches on the chip surface during thermal paste application, and the plastic material (especially one with elastic deformation capabilities) can compensate for minor misalignment of the shaft hole or installation errors, thereby reducing the bias pressure exerted by the left and right sides of the outer shell on the thermal paste application layer. In other preferred embodiments, the ball bearing constitutes a novel handheld roller tool, with the outer ring of the ball bearing configured as the outer shell. When the outer ring is made of plastic, it also has the advantage of preventing scratches on the chip surface during thermal paste application.

[0111] Optionally, the ball bearing can be a deep groove ball bearing, cylindrical roller bearing, angular contact bearing, or self-aligning ball bearing, etc. For example, for a deep groove ball bearing, the outer surface of its inner ring has a continuous arc-shaped deep groove raceway, and the inner surface of its outer ring also has a continuous arc-shaped deep groove raceway. For example, the outer ring of the deep groove ball bearing is made of plastic material (such as PP, POM, polytetrafluoroethylene (PTFE), perfluoroethylene propylene (FEP), perfluoroalkoxy resin (PFA), polyvinylidene fluoride (PVDF), or ethylene-tetrafluoroethylene copolymer (ETFE), or a fluorinated polymer or fluorinated composite material, etc.), wherein the fluorinated material is directly configured as the outer shell layer. Optionally, the deep groove ball bearing can be configured as an open type (neither side has a dust cover), a single-sided sealed type (one side has a dust cover), or a double-sided sealed type (both sides have dust covers). The open type can be configured so that the balls are visible, and the balls can be configured to be transparent, translucent, or colored, thereby achieving diversification and enriching the product line.

[0112] Optionally, ball bearings may also have cages (for separating the balls to prevent collisions) and / or seals (for dust and dirt protection, etc.).

[0113] For example, a seal can be one ring coupled to one side of a ball bearing, or two rings can be coupled to opposite sides of the ball bearing. The seal can be made of rubber, silicone, or metal. Seals can also be of different colors, allowing for a rich variety of colors in a multi-layered nested structure, which, combined with other components such as grips, creates a diverse product line.

[0114] In some embodiments, the outer ring is, for example, the outer ring of a deep groove ball bearing. Preferably, it has an outer cylindrical surface and is specially treated (e.g., sandblasting, grooving) to increase adhesion to the outer casing (e.g., rubber or plastic coating).

[0115] In one embodiment, when the insert shaft is connected to the handle, at least one end of the insert shaft is coupled to the outer periphery of the inner ring (or the outer periphery of the outer layer).

[0116] It should be noted that if the new handheld roller tool also includes a third pinch or handle after inserting the shaft, the first pinch may no longer be needed to perform its function, or the first pinch may regain its function after the shaft can be detached, for example.

[0117] In one embodiment, the surfaces of the left and right ends of the insert shaft are surface-treated, such as plated, coated, or engraved, which has the benefits of increasing skin-friendliness, friction, and visual appeal.

[0118] In one embodiment, the insert shaft may be connected to a handle, for example, one or both ends of the insert shaft may be connected to a handle.

[0119] In some embodiments, the second fixed connection means that the contact surface between the insert shaft and the inner ring (e.g., the central through hole of the inner ring) does not experience circumferential misalignment, or if circumferential misalignment occurs, it is controlled within a small allowable error range. The insert shaft is subjected to hand-held thrust and pressure, which are transmitted to the inner ring of the ball bearing, and then from the inside out, from the inner ring to the balls, then to the outer ring, and finally to the outer sheath, ultimately acting on the target surface, such as thermal paste or its spread layer.

[0120] In other embodiments, the third or fourth fixed connection may be achieved by means of welding, bonding or magnetic attraction.

[0121] For example, non-removable connections are achieved, for instance, by adhesive bonding, interlocking plugs (such as insert plates), or welding. Removable connections allow for the removal and installation of the insert shaft.

[0122] For radial tightening pressure, the magnitude of the frictional force on the contact surface is proportional to the radial tightening pressure. The greater the radial tightening pressure, the tighter the plug will be, and the less likely it is to slip friction on the contact surface.

[0123] In some embodiments, the outer jacket has an outer surface layer, which is a nanotechnology coating, a micron-scale pit array layer, a silicone coating, or a ceramic coating. For example, a nanotechnology coating may be a lotus leaf-like surface structure layer. A micron-scale pit array layer, such as an outer surface layer having a distributed array of micron-scale pits, is a design that enhances the non-stick properties of the outer jacket surface.

[0124] In some embodiments, a multi-layer nested structure is adopted, the multi-layer nested structure including an outer layer and a ball bearing inside the outer layer, the outer layer being fixedly connected to the ball bearing; and the ball bearing having an inner ring, the left and right ends of the inner ring being able to serve as recessed first finger pinch portions, or the ball bearing having a pin, the left and right ends of the pin being able to serve as second finger pinch portions.

[0125] In some implementations, a novel handheld roller tool is used for spreading thermal paste. Its advantages include the high non-stick properties required for the outer surface of the outer layer of the thermal paste, which is preferably made of materials such as highly non-stick polytetrafluoroethylene (PTFE) or relatively non-stick PP (or POM). However, materials such as highly non-stick PTFE are more expensive than ordinary plastics. The multi-layered nested structure allows for adjustable material usage in the outer layer, saving on materials with excellent non-stick properties but higher prices, such as PTFE. The multi-layered nested structure also offers better structural hierarchy and aesthetics, as well as the enjoyment and stress-relieving effect of smooth rotation during operation or non-operation, enabling diverse structural designs and user experiences, thus enriching the product line. Furthermore, ball bearings (or magnetic levitation bearings) can significantly reduce starting resistance and running resistance. In particular, lower starting resistance is more beneficial for the spreading of thermal paste, especially when the thermal paste layer is already thin. It can effectively reduce the instantaneous sliding friction that may occur during startup, which can easily damage (e.g., break) the already thin spreading layer.

[0126] It is evident that by using the outer layer as the core working part, compared to components such as sliding friction or bearings, the amount of this core working part can be reduced, and it can be more effectively coupled with other possible components. Sliding friction or bearings, constrained by the friction method, require minimizing the contact surface to reduce friction (especially starting resistance), thus limiting the diameter of the shaft. However, if the core working part is not coupled with other components, it will inevitably be thicker, resulting in a larger quantity. But the novel hand-held roller tool of this application achieves a better effect by using the unique structural characteristics of the outer layer and the ball bearing (or magnetic levitation bearing) as preferred coupling factors, allowing these preferred coupling factors to form a synergistic effect, thereby achieving better results such as preventing slippage of the paste (e.g., thermal paste) spread layer. This novel handheld roller tool boasts superior structural and functional reliability, optimized human-computer interaction, flexible configuration options, diverse appearances, engaging features, and controllable costs. This disclosure provides technical insights into improving the new structure, its new functions, and enhancing the user experience. It is better suited for tasks such as applying or rolling pastes (e.g., thermal paste), particularly for finely spreading thermal paste on target surfaces like small-sized exposed silicon wafers and large-sized copper caps.

[0127] The anti-slip design prevents the outer layer from experiencing momentary sliding friction (rather than rolling friction) on the thinner spread layer when the starting resistance is potentially too high, thus easily pushing the thinner spread layer apart. At the point of breakage, the target surface, such as the chip surface, is easily exposed. This exposure, where the thermal paste is not completely covered, can easily lead to high localized thermal resistance. It can also easily trap air bubbles, further increasing thermal resistance. Furthermore, the simultaneous expansion and contraction of these air bubbles during repeated power-on and power-off cooling cycles can cause a pumping effect, squeezing out the thermal paste to fill the gaps, resulting in deteriorated thermal conductivity.

[0128] It should be noted again that in this application, the novel handheld roller tool and its implementation methods and embodiments are combined with each other, especially features that do not necessarily depend on each other can be combined with each other.

[0129] To reduce friction (especially starting resistance) and facilitate coupling with other possible components, while also saving on the amount of core components (especially related components of functional outer surfaces), and to achieve adaptability to thermal paste spreading layers and similar low cost and structural robustness as traditional scrapers or finger cots and newly developed thermal paste spreading tools such as finger rollers, this disclosure also provides a technical concept and solution: Specifically, a first aspect provides a novel, simple handheld tool for spreading thermal paste, which is constructed as a tube with a working surface configured as a cylindrical outer surface. The tube is configured to be driven by pressing the circumferential outer surface of the tube with a finger, thereby causing the working surface to roll. The tube is used to apply fingers to the cylindrical outer surface and push the cylindrical outer surface of the tube to generate forward rolling and downward pressing of the thermal paste, thereby achieving the acquisition of a thermal paste spread layer, or the continuous thinning of the thermal paste spread layer, or the leveling, uniformity and thinning of the spread layer based on the application layer of traditional tools such as scrapers.

[0130] It is evident that this new type of simple handheld tool has a simple overall structure and a single component, which enables rapid, large-scale, and low-cost manufacturing. It can achieve structural simplicity (or high structural robustness) comparable to a scraper, thus having a small size (facilitating production, storage, packaging, shipping, and use) and no potential failures between other components, thereby achieving a wide range of uses comparable to a scraper. Furthermore, instead of the left-right pinching drive method like a finger roller, it uses the finger to push and press the outer circumference of the tube to create a rolling drive method, thereby achieving a thermal paste spreading effect similar to or close to that of a finger roller, while a scraper cannot achieve a similar or close thermal paste spreading effect.

[0131] Therefore, this new type of simple handheld tool can achieve structural robustness comparable to that of a scraper, which is beneficial for manufacturing, storage and sales, and promotes widespread use; it can also achieve a thermal paste spreading effect similar to or close to that of a finger-pinched roller, which is not possible with traditional application tools such as scrapers.

[0132] Optionally, the working surface is configured to have a first length and a first outer diameter.

[0133] In some embodiments, the tube is configured to have a first length and a first outer diameter. For example, if the outer surface of the tube forms a standard cylindrical shape, the circumferential outer surface of the tube forms a working surface and can be used for the finger pressing to form a rolling drive.

[0134] In other embodiments, the circumferential outer surface of the tube is configured to include a working surface and a non-working surface, the working surface being configured as a cylindrical outer surface having a first length and a first outer diameter. The non-working surface and / or the working surface are used for the driving mode of the finger pressing to form a rolling motion. Furthermore, the shape of the non-working surface is not limited, and its size is determined so as not to affect the parallel adhesion of the working surface to the thermal paste layer on the target surface (e.g., the bare silicon wafer of a CPU or the same cover plate).

[0135] In one example, the first section of the pipe corresponding to the working surface has a large outer diameter, while the second section of the pipe corresponding to the non-working surface has a small outer diameter. The first and second sections can be coaxial, thus making the axis of rotation more uniform and stable during the rolling drive. Optionally, the two second sections are respectively located on both sides of the first section.

[0136] In another example, the first section of the tube corresponding to the working surface has a large outer diameter, while the second section of the tube corresponding to the non-working surface has a small outer diameter and exhibits a variable diameter. The first and second sections can be coaxial, thus ensuring a more unified and stable shaft axis during the rolling drive. Optionally, the two second sections are respectively located on either side of the first section. Optionally, the variable diameter configuration of the second sections is such that it gradually decreases from near the working surface to away from it, thus resembling an overall spindle shape that is large in the middle and small at both ends.

[0137] In one embodiment of the novel simple handheld tool, the tube body is replaced with a solid tube body. The solid tube body is constructed as a tube body having a first length and a first outer diameter, and is configured with a cylindrical outer surface. The solid tube body serves as an alternative or alternative solution to the tube body, achieving similar structural robustness and comparable thermal paste spreading effect. Exemplarily, the solid tube body can be formed by inserting an inner liner core or by integral molding, etc. The material of the inner liner core can be the same as or a different material from the tube body.

[0138] In another embodiment of the novel simple handheld tool, the first section of the tube corresponding to the working surface can be replaced by a rod. The rod is constructed to have a first length and a first outer diameter, and is solid with a cylindrical outer surface. Further, it may also include the second section of the tube corresponding to the non-working surface, connected to the side of the rod, for example, one section connected to one side of the rod or two sections each connected to one side of the rod. Optionally, the second section of the tube corresponding to the non-working surface can be replaced by a solid section, for example, configured as a second section of the rod corresponding to the non-working surface, while the rod corresponding to the working surface is configured as the first section.

[0139] In some embodiments of the new, simple handheld tools, the tube is configured as a roller.

[0140] Preferably, the tube body (or the outermost layer of the tube body) corresponding to the working surface is configured to be made of polytetrafluoroethylene, perfluoroethylene propylene, perfluoroalkoxy resin, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, high-density polyethylene, PP or POM, or the outer layer is made of fluorinated polymer or fluorinated composite material.

[0141] Optionally, the tube body corresponding to the working surface is composed of a multi-layer composite structure. For example, the multi-layer composite structure is configured as a composite plastic layer outside a metal core (or plastic core); or a composite plastic layer outside a metal core (or plastic core); or a composite nanotechnology coating, micron-level pit array layer, silicone coating, or ceramic coating outside a metal core (or plastic core), thereby giving the outer surface of the tube body corresponding to these working surfaces good non-stick properties. The plastic layer is configured, for example, as being made of polytetrafluoroethylene, perfluoroethylene propylene, perfluoroalkoxy resin, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, high-density polyethylene, PP, or POM; or, the outer layer is made of a fluorinated polymer or a fluorinated composite material, these exemplary materials having good non-stick properties.

[0142] The second aspect provides another of the aforementioned combined tools, including a novel, easy-to-use hand tool as described in the first aspect, and a scraper or finger cot. Optionally, the scraper or finger cot can be used for preliminary application using a scraping and cutting method, while the novel, easy-to-use hand tool can be used for subsequent efficient and high-quality leveling, homogenization, and thinning using a rolling and cutting method.

[0143] In some embodiments of the combined tool, it is possible to achieve the spreading of thermal paste, or the continuous thinning of the thermal paste spreading layer, or the smoothing, uniformity, and thinning of the coating layer based on traditional tools such as scrapers. In particular, the continuous thinning of the thermal paste spreading layer, or the smoothing, uniformity, and thinning of the coating layer based on traditional tools such as scrapers, allows this novel, simple handheld tool to work in conjunction with a traditional scraper (or finger cot) as a component tool to perform a spreading function.

[0144] The third aspect provides a method of using the above-mentioned novel simple handheld tool, including: a driving method in which the working surface is formed by pushing the outer circumference of the tube body with the fingers.

[0145] In some embodiments of the method of use, the novel simple handheld tool includes a non-working surface and a working surface, the non-working surface and / or the working surface being used for the finger to push and press, thereby forming a rolling drive.

[0146] In some examples, one finger presses against the working surface; or two fingers of one hand (or one finger from each of the two hands) press against the working surface; or one or more fingers of the left hand and one or more fingers of the right hand press against the non-working surface respectively; or one or more fingers of the left hand press against the working surface and one or more fingers of the right hand press against the non-working surface; or one or more fingers of the right hand press against the working surface and one or more fingers of the left hand press against the non-working surface; or one finger presses against the non-working surface. In other examples, the finger may be replaced by other parts of the hand, such as the palm or back of the hand.

[0147] In some embodiments of the method of use, it is possible to obtain a thermal paste spread layer, or to continuously thin the thermal paste spread layer, or to level, even out, and thin the spread layer based on a traditional tool such as a scraper. It is particularly evident that the continuous thinning of the thermal paste spread layer, or the leveling, even out, and thinning of the spread layer based on a traditional tool such as a scraper, allows this novel, simple handheld tool to function as a spreader on its own, or to function in conjunction with a traditional scraper (or finger cot) as a component tool.

[0148] The tube body in the above-mentioned new simple handheld tools or combination tools, driven by pressing the outer surface of the circumference with fingers, no longer has friction such as sliding friction or bearing friction (especially the starting resistance at the friction surface), and can achieve a thermal paste spreading effect similar to that of the outer shell layer of the aforementioned new handheld roller tool. This tube can be seen as a new type of handheld roller tool with reduced component elements. It achieves near-or equivalent thermal paste spreading effects, especially in the continuous thinning of the thermal paste layer or in the leveling, uniformity, and thinning of the coating layer based on traditional tools such as scrapers. However, this new simple handheld tool has a simple overall structure and a single component, which enables rapid, large-scale, and low-cost manufacturing. It can achieve structural simplicity (or high structural robustness) comparable to scrapers, thus having a small volume (facilitating production, storage, packaging, shipping, and use) and no failures that may occur between other components. Therefore, it can achieve a wide range of uses comparable to scrapers. It can help users solve problems such as the difficulty in applying cement grease (e.g., Shin-Etsu 7921, which is notoriously difficult to apply), the easy waste of thermal paste, and the time-consuming but inefficient process. Furthermore, it allows for the design and production of high-performance thermal pastes with higher thermal conductivity and durability but with a thicker or even hardened texture, achieving efficient and high-quality heat conduction at the end, thereby saving energy, reducing emissions, and enabling users to work efficiently. It has broad market potential.

[0149] It should be noted that in the specification and claims of this application, the term "above" means two or more. The terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0150] It should be understood that the orientation descriptions, such as up, down, front, back, top, bottom, inside, outside, side, etc. (if they exist), are only for the purpose of facilitating and simplifying the description of this application, 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, and should not be construed as a limitation of this application.

[0151] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application. In the absence of conflict, the embodiments and features of the embodiments of this application can be combined with each other.

Claims

1. A novel handheld roller tool, characterized in that, The structure employs a multi-layered nested structure, which includes an outer layer and ball bearings inside the outer layer; and the ball bearing has an inner ring, the left and right ends of which can serve as recessed first pinch portions, or the ball bearing has a pin, the left and right ends of which can serve as second pinch portions.

2. The novel handheld roller tool according to claim 1, characterized in that, Also includes: The outer layer is composed of a rubber coating or a plastic coating, or the outer layer is composed of the outer ring of the ball bearing, or the outer layer is a sleeve attached to the outside of the ball bearing.

3. The novel handheld roller tool according to claim 2, characterized in that, Also includes: The outer outer layer is composed of a plastic coating layer, wherein the plastic coating layer is made of polytetrafluoroethylene, PP or POM material and is disposed outside the ball bearing made of steel; or, the outer outer layer is sleeved outside the ball bearing, and the sleeve is formed by a retaining spring.

4. The novel handheld roller tool according to claim 1, characterized in that, Also includes: The outer shell is made of polytetrafluoroethylene, perfluoroethylene propylene, perfluoroalkoxy resin, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, high-density polyethylene, PP, or POM; or, the outer shell is made of a fluorinated polymer or a fluorinated composite material; and / or, the balls in the ball bearing are ball rollers, cylindrical rollers, or tapered rollers; and / or, the balls in the ball bearing are made of plastic, ceramic, glass, or metal; and / or, the ball bearing also has a cage and / or a seal.

5. The novel handheld roller tool according to claim 1, characterized in that, Also includes: The inner ring is coupled with a plug shaft; the plug shaft is configured to be coupled to the inner ring in a plug-in manner, such that the left and right ends of the plug shaft can serve as a third finger pinch part, or at least one of the left and right ends of the plug shaft can be used to connect to a handle.

6. The novel handheld roller tool according to claim 5, characterized in that, Also includes: The insertion method is configured as a second fixed connection, and the second fixed connection includes a non-detachable connection or a detachable connection; or, the insertion method is configured as a radially tight plug connection between the insertion shaft and the inner ring; and / or, the left and right ends of the insertion shaft are respectively configured as a left extension end for pinching and a right extension end for pinching; and / or, a washer or spring is further included between the insertion shaft and the inner ring.

7. The novel handheld roller tool according to claim 6, characterized in that, The left and right ends of the insert shaft are respectively configured as a left extension end for gripping and a right extension end for gripping, and also include: The right end of the insert shaft is configured to connect to a pinching structure, which constitutes the right extension end. The right end of the insert shaft and the pinching structure are configured for a detachable connection, which may include a bolted connection, a plug-in connection, an adhesive connection, a snap-fit ​​connection, or a magnetic connection; or... The insert shaft includes a first sub-insert shaft and a second sub-insert shaft, wherein the left end of the first sub-insert shaft is configured as the left extension end, the right end of the second sub-insert shaft is configured as the right extension end, and the right end of the first sub-insert shaft is inserted into the left port of the inner ring, and the left end of the second sub-insert shaft is inserted into the right port of the inner ring.

8. The novel handheld roller tool according to claim 5, characterized in that, The left and right ends of the insert shaft can serve as a third pinch part, and it also includes: The left and right ends are configured to have a surface treatment, which includes plating, coating, or engraving texture, thereby increasing skin-friendliness, friction, and visual appeal; or, The left and right ends are configured to have a sticker, a cap, or a cover inserted thereon, and the sticker, the cap, or the cover can serve as a fourth pinch part.

9. The novel handheld roller tool according to claim 1, characterized in that, The left and right ports of the inner ring are respectively configured to be fixedly connected to a first extension structure as a third, and the outer end of the first extension structure can serve as a fifth finger pinch part; or, the left and right ends of the pin are respectively configured to be fixedly connected to a second extension structure as a fourth, and the outer end of the second extension structure can serve as a sixth finger pinch part; or, the inner ring is configured to further include an end plug, the end plug being coupled to the left port and / or right port of the inner ring in an insert manner, and the outer end of the end plug can serve as a seventh finger pinch part.

10. The novel hand-held roller tool according to any one of claims 1-4 and 6-9, characterized in that, The ball bearing is replaced with a magnetic levitation bearing or an outer spherical bearing.

Images