A knife sharpener and a knife sharpening device

Abstract

Knife sharpener, characterized in that it comprises: a handle having an outwardly projecting positioning pin formed centrally at at least one end; a turntable having a first mounting groove in the center of its side facing the handle; a bearing fixedly arranged in the first mounting groove and mounted on the positioning pin, the turntable being rotatably mounted on the positioning pin of the handle via the bearing; and a grinding blade located on the side of the turntable opposite the handle.

Description

Technical area

[0001] The present utility model belongs to the technical field of knife sharpeners, in particular it relates to a knife sharpener and a knife sharpening device. State of the art

[0002] In everyday life, a knife is one of the most important kitchen utensils.

[0003] The blade is the most important part of a knife. With prolonged use, the blade becomes dull. To improve the knife's cutting performance, the blade must be sharpened regularly to maintain its sharpness.

[0004] Conventional whetstones are typically relatively heavy, difficult to move, and require the user to hold the knife in their hand and move it relative to the whetstone to achieve a sharpening effect. This is extremely cumbersome to handle. Content of the utility model

[0005] The present utility model provides a knife sharpener to solve the above-mentioned problems.

[0006] The knife sharpener provided comprises a handle, a rotary disc, a bearing, and a grinding blade. The center of at least one end of the handle protrudes outward, forming a positioning pin. The center of the rotary disc is aligned toward the side of the handle and has a first mounting groove. The bearing is firmly installed in the first mounting groove and slipped over the positioning pin. The rotary disc is mounted on the positioning pin on the handle via the bearing. The grinding blade is attached to the side of the rotary disc facing away from the handle.

[0007] Specifically, the knife sharpener further comprises a fastening element, wherein the center of the rotating disk has a through hole. The bearing comprises a rotating part and a fixed part. The outer surface of the rotating part rests against the first mounting groove, and the inner diameter of the rotating part corresponds to the size of the through hole. The rotating part is placed over the fixed part, wherein the rotating part and the fixed part are rotatably and slidably connected to each other. The inner diameter of the fixed part corresponds to the size of the positioning pin. The fastening element penetrates the through hole and the bearing and is connected to the positioning pin, whereby the fixed part is pressed and fixed against the positioning pin.

[0008] Specifically, the fastening element comprises a screw, with a pressure plate integrally formed on the screw. The positioning pin has a threaded hole corresponding to the screw.

[0009] In addition, the fastening element comprises a first washer which is inserted between the pressure plate and the fixed part.

[0010] The knife sharpener also includes an anti-slip ring. The outer side of the rotating disc is recessed inward, forming a second mounting groove. The anti-slip ring is inserted into the second mounting groove and protrudes relative to the outer side of the rotating disc.

[0011] Specifically, the knife sharpener also includes a magnetic element. The rotating disc has at least one magnetic bore, wherein the magnetic bore is arranged at a distance from the first mounting groove. The magnetic element is housed in the magnetic bore, and the grinding blade is magnetically attracted to the magnetic element, being located on the side of the rotating disc facing away from the handle.

[0012] Specifically, the opening of the magnet hole is aligned towards the handle side.

[0013] Specifically, the peripheral side of the turntable extends away from the handle side and forms an annular projection whose height is less than the thickness of the grinding blade, thereby limiting the position of the grinding blade on the turntable.

[0014] Specifically, the projection is provided with at least one recess, with the turntable being provided with a finger recess near the recess.

[0015] Specifically, the knife sharpener also includes a second washer that is placed over the positioning pin and is located between the bearing and the handle.

[0016] Specifically, the positioning pin is arranged symmetrically at both ends of the handle, with a rotating disc, a bearing and a grinding blade mounted on each end.

[0017] Specifically, the outer peripheral surface of the middle section of the handle is drawn inwards and forms a grip recess.

[0018] The present utility model application also provides a knife sharpening device comprising a positioner and a knife sharpener. The periphery of the positioner is inclined and provided with at least one mounting surface and a magnetic plate. The knife sharpener comprises a handle, a rotary disc, a bearing, and a grinding blade. The center of at least one end of the handle protrudes outward and forms a positioning pin. The center of the rotary disc is provided with a first mounting groove toward the handle side. The bearing is firmly installed in the first mounting groove and placed on the positioning pin. The rotary disc is mounted on the positioning pin via the bearing. The grinding blade is located on the side of the rotary disc facing away from the handle side. The knife sharpener and the positioner are placed at a distance on the same processing platform.The blade is fixed to the magnetic plate by magnetic attraction and positioned at a specific angle on the processing platform. The knife sharpener is placed on the cutting edge of the blade and rotated relative to it, so that the grinding blade sharpens the edge.

[0019] Compared to the prior art, the knife sharpener provided by the present utility model enables a rotating movement of the grinding blade relative to the handle through the arrangement of the handle, the rotating disc, the bearing, and the grinding blade, allowing the cutting edge of the tool to be effectively sharpened during the movement. This design is relatively simple, the handle is easy to manufacture, inexpensive, and its use requires very little effort for the user, with a very good grinding effect.

[0020] The knife sharpening device provided by the present utility model enables effective positioning of the blade through the interaction of the knife sharpener and positioner, thus facilitating the grinding of the cutting edge. Description of the drawings

[0021] To more clearly explain the technical solutions in the embodiments of the present utility model application, a brief introduction to the drawings used in the description of the embodiments is provided below. Obviously, the drawings described below are only a few embodiments of the present utility model. Those skilled in the art will be able to create further drawings based on these drawings without any creative effort. The following applies: Fig. 1 is a perspective structural view of the knife sharpening device provided by the present utility model; Fig. 2 is a perspective structural view of a first embodiment of the knife sharpener provided by the present utility model; Fig. 3 is an exploded view of the first embodiment of the knife sharpener provided by the present utility model; Fig. 4 is a schematic partial cross-sectional plan view of the first embodiment of the knife sharpener provided by the present utility model; Fig. 5 is an exploded view of the second embodiment of the knife sharpener provided by the present utility model; Fig. 6 is a schematic partial cross-sectional plan view of the second embodiment of the knife sharpener provided by the present utility model; Fig. 7 is an enlarged view of the turntable as shown in Fig. 5 shown. Detailed embodiment

[0022] In the following, in conjunction with the accompanying drawings of the embodiments of the present utility model, the technical solution of these embodiments is described clearly and completely. Obviously, the described embodiments represent only a portion of all possible embodiments of the present utility model and not the entirety. All further embodiments developed by persons skilled in the art based on the embodiments without creative activity are also within the scope of protection of the present utility model.

[0023] Please note that all directions (such as up, down, The directions (left, right, front, back, etc.) in the embodiments of the present utility model serve exclusively to explain the relative position and movement of the individual components in a specific position (e.g., as shown in the drawings). Should this specific position change, the directional information will also change accordingly.

[0024] Furthermore, this utility model contains terms such as “first”, "second", etc. are to be understood merely as descriptions and must not be interpreted as an indication of their relative importance or the number of features. The features marked "first", "second", etc. may explicitly or implicitly include at least one of these features. In the description of the utility model "several" means at least two, for example two, three, etc., unless clearly and specifically stated otherwise.

[0025] Unless clearly defined otherwise, terms such as "connected", "attached", etc., are to be understood in the broadest sense. For example, "Attached" may mean a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate medium; it may be an internal connection of two components or an interaction between two components, unless clearly defined otherwise. Those skilled in the art will understand the specific meaning of these terms accordingly, depending on the context in the utility model.

[0026] Furthermore, the technical solutions of the various embodiments of the present utility model may be combined with each other, provided this is feasible for those skilled in the art. However, if a combination of the technical solutions leads to a contradiction or is technically impracticable, such a combination is deemed non-existent and does not fall within the scope of protection of the present utility model.

[0027] With reference to the Fig. The present application relates to a knife sharpening device 100 comprising a positioner 30 and a knife sharpener 10. The positioner 30 is provided on its peripheral side with at least one mounting surface 31, on which a magnetic plate 33 is mounted.

[0028] The knife sharpener 10 comprises a handle 1, a rotary disk 2, a bearing 5, and a grinding blade 4. A positioning pin 102 protrudes centrally from at least one end of the handle 1. A first mounting groove 204 is formed in the center of the rotary disk 2, on the side facing the handle 1. The bearing 5 is firmly mounted in the first mounting groove 204 and is connected to the grinding blade 4 by means of the positioning pin. 102. The turntable 2 is mounted on the positioning pin 102 on the handle 1 via the bearing 5. The grinding blade 4 is attached to the side of the turntable 2 facing away from the handle 1.

[0029] The knife sharpener 10 and the positioner 30 are positioned at a distance from each other on the same processing platform (not shown). The tool (not shown) is held by magnetic attraction with the magnetic plate 33 and positioned at a specific angle to the processing platform. The knife sharpener 10 rests against the cutting edge of the tool and is rotated relative to it, with the grinding blade 4 grinding the cutting edge.

[0030] The bearing 5 allows the rotating disk 2 to rotate relative to the positioning pin 102. The grinding blade 4 rotates together with the rotating disk 2 relative to the handle 1. The entire knife sharpener 10 can move relative to the positioner 30, thereby achieving a grinding process of the tool. During grinding, the material removal by the grinding blade 4 is more even and effective, thereby improving the grinding result. At the same time, the force required by the user during grinding is reduced. low, which makes the device extremely practical.

[0031] It should be noted that the mounting surface 31 is arranged obliquely along the circumferential side of the positioner 30. When the tool is magnetically adhered to the mounting surface 31, it can be positioned at a specific angle to the machining platform. Since the grinding blade 4 is positioned perpendicular to the machining platform, the cutting edge of the tool can be ground by the grinding blade 4. Of course, the positioner 30 can also have multiple mounting surfaces 31 spaced apart along its circumferential side, each oriented at different angles to the machining platform. The arrangement at different angles enables different grinding angles at the cutting edge.

[0032] With particular reference to the Fig. 5 and Fig. 6 is explained: To To ensure the stability of the rotary connection between the rotary disk 2 and the handle 1, the knife sharpener 10 in this embodiment additionally comprises a fastening element. A through hole 203 is formed in the center of the rotary disk 2. The bearing 5 comprises a rotary element 51 and a fixed element 53. The outer peripheral side of the rotary element 51 rests against the first mounting groove 204, and the inner diameter of the rotary element 51 is matched to the size of the through hole 203. The rotary element 51 is slipped over the fixed element 53 and rotatably connected thereto. The inner diameter of the fixed element 53 is matched to the size of the positioning pin 102. The fastening element runs through the through hole 203 and the bearing 5 and is connected to the positioning pin. 102. The fixed element 53 is thereby fixed on the positioning pin 102.

[0033] It should be noted that the term "matched to corresponding dimensions" means that the sizes are substantially the same. In particular, the term "matching the inner diameter of the rotary member 51" to the size of the through hole 203 means that the rotary member 51 does not extend inward relative to the through hole 203, thereby avoiding contact with the fastener. This ensures that the fastener exclusively fixes the fixed member 53 onto the positioning pin 102. Likewise, the inner diameter of the fixed member 53 is matched to the size of the positioning pin 102, so that the fixed member 53 fits precisely onto the positioning pin 102, which increases the stability and reliability of the fastening by the fastener.

[0034] The fastening element can comprise a screw 7, on which a pressure plate is integrally formed. The positioning pin 102 has a threaded hole corresponding to the screw 7. The fastening element rests with the pressure plate on the fixed element 53 and is screwed via the screw 7 to the threaded hole formed in the positioning pin 102, whereby the fixing function is achieved. Of course, the fastening element can also comprise the screw 7 and a first washer 8, wherein the first washer 8 is arranged between the pressure plate and the fixed element 53. Since the inner diameter of the fixed element 53 is generally larger, an excessively large Pressure plate can be omitted; by adding the first washer 8, the fixed element 53 can be effectively fixed. This makes the structure simpler and manufacturing more convenient.

[0035] To reduce the abrasion of the rotating disc 2 during rolling, the knife sharpener 10 further includes an anti-slip ring 3. A second mounting groove 205 is formed on the outer surface of the rotating disc 2, into which the anti-slip ring 3 is inserted and protrudes beyond the outer periphery of the rotating disc 2. When the rotating disc 2 rotates, the anti-slip ring 3 mainly contacts the machining platform, thereby preventing abrasion on the rotating disc 2. Furthermore, if the anti-slip ring 3 becomes damaged, it can be easily disassembled and replaced, which is very convenient and saves costs. The anti-slip ring 3 also ensures sufficient friction with the machining platform during grinding, causing the rotating disc 2 and the grinding blade 4 to rotate. This results in a uniform grinding result.At the same time, the anti-slip ring 3 lifts the rotating disc 2 from the platform, preventing the knife sharpener 10 from scratching the platform, and protects the rotating disc 2 and the handle 1 from moisture or corrosive substances on the platform. Furthermore, it acts as a shock absorber in the event of a collision, thus increasing the service life of the knife sharpener 10.

[0036] Optionally, the anti-slip ring 3 can be a silicone ring, a rubber ring or a Ring can be made of a different material - without restriction to specific materials.

[0037] Please continue to refer to the Fig. 3, Fig. 4, Fig. 6 and Fig. 7: The knife sharpener 10 also includes a magnetic element 6. At least one magnetic bore 202 is provided in the rotating disk 2, which is arranged at a distance from the first mounting groove 204. The magnetic element 6 is housed in the magnetic bore 202. The grinding blade 4 is held by magnetic force from the magnetic element 6 on the side of the rotating disk 2 facing away from the handle side. The arrangement of the magnetic element 6 allows the grinding blade 4 to be magnetically attached to one side of the rotating disk 2, which enables subsequent grinding work without the grinding blade 4 shifting during repeated grinding. This ensures the grinding quality. When the grinding blade 4 needs to be replaced, it can be pulled off the rotating disk 2 and replaced with little force. This design ensures both reliable attachment and convenient disassembly and assembly.

[0038] It should be noted that the magnet bore 202 can either pass completely through the turntable 2 or be open on one side. As shown in the Fig. 3 and Fig. 4 (first embodiment), the magnet hole 202 is open towards the side of the grinding blade 4, which increases the magnetic adhesion of the grinding blade 4. As shown in the Fig. 6 and Fig. As shown in Figure 7 (second embodiment), the magnet bore 202 is open toward the handle side. This design not only facilitates the installation of the magnet element 6, but also prevents the magnet element 6 from accidentally falling out due to the one-sided opening in conjunction with the attractive force of the grinding blade 4.

[0039] Please continue to refer to Fig.The edge area of ​​the rotary disc 2 extends from the side facing away from the handle 1 and forms a circumferential projection 23. The height of the projection 23 is less than the thickness of the grinding blade 4, thereby defining the position of the grinding blade 4 on the rotary disc 2. The projection 23 does not interfere with the grinding process of the grinding blade 4 on the tool. The combination of the magnetic element 6 and the projection 23 reliably fixes the grinding blade 4 on the rotary disc 2, preventing any misalignment during grinding of the tool. This increases the stability and safety of the knife sharpener 10.

[0040] To facilitate the replacement of the grinding blade 4, the projection 23 at least one recess. A grip recess 201 is arranged near each recess on the rotary disk 2. In this embodiment, two symmetrically arranged recesses and grip recesses 201 are preferably provided to enable simultaneous gripping of both sides and easy removal of the grinding blade 4 from the rotary disk 2.

[0041] The knife sharpener 10 further comprises a second washer 9. This second washer 9 is placed on the positioning pin 102 and arranged between the bearing 5 and the handle 1. Since the rotating element 51 rotates the rotating disc 2 relative to the handle 1, the second washer 9 prevents direct contact and friction between the rotating disc 2 or the rotating element 51 and the handle 1. This protects the components and prevents wear. At the same time, friction during rotation is reduced, resulting in a more even and smoother rotation of turntable 2.

[0042] It is particularly noteworthy that the knife sharpener 10 can be designed symmetrically. This means that a positioning pin 102 is arranged symmetrically at each end of the handle 1, and both the rotating disc 2, the bearing 5, and the grinding blade 4 are mounted. This configuration not only enables the rotating disc 2 to roll more smoothly, which facilitates sharpening the tool, but also allows whetstones of different grits to be mounted on both ends of the knife sharpener 10. This allows both sides to be used for sharpening, and the user can select the appropriate whetstone depending on the desired degree of sharpness without having to replace it during use.

[0043] In this embodiment, the outer peripheral surface of the The central portion of the handle 1 has an inwardly curved grip recess 101. This inwardly recessed grip recess 101 makes it easier for the user to hold and simultaneously reduces the overall weight, which improves handling. In an alternative embodiment, the handle 1 can also be cylindrically shaped or have another recess in the central portion of the outer peripheral surface—this is not limited. The handle 1 can be made of wood, but can also be made of other materials—this also applies without limitation.

[0044] Compared to the prior art, the knife sharpener 10 provided by the present utility model application, through the arrangement of the handle 1, the rotary disk 2, the bearing 5, and the grinding blade 4, enables the grinding blade 4 to rotate together with the rotary disk 2 relative to the handle 1. This allows the cutting edge to be effectively sharpened during the movement of the grinding blade 4 relative to the tool. This design is characterized by a simple structure, uncomplicated manufacture of the handle, low cost, and effortless handling for the user. The knife sharpening device 100 provided in the present utility model also allows the tool to be sharpened efficiently by the cooperation of the knife sharpener 10 with the positioner 30. which makes grinding the cutting edge easier.

[0045] The embodiment described above is merely an example of the present utility model application. It should be noted that those skilled in the art may make modifications without departing from the spirit and scope of the invention, which modifications nevertheless fall within the scope of this utility model.

Claims

[1] Knife sharpener, characterized by that it includes the following: a handle, at least at one end of which an outwardly projecting positioning pin is formed in the center; a turntable which has a first mounting groove in the center on its side facing the handle; a bearing that is fixedly arranged in the first mounting groove and placed on the positioning pin, wherein the turntable is rotatably mounted on the positioning pin of the handle via the bearing; and a grinding blade located on the side of the turntable facing away from the handle. [2] Knife sharpener according to claim 1, characterized by , furthermore, that it has a fastening element, wherein the turntable has a through hole in the center and includes the bearing: a rotating element whose outer circumference rests against the first mounting groove and whose inner diameter is matched to the dimensions of the through hole, as well as a fixed element onto which the rotating element is mounted and to which it is rotatably and slidably connected, wherein the inner diameter of the fixed element is matched to the dimensions of the positioning pin, and wherein the fastening element is connected to the positioning pin through the through hole and the bearing in order to fix the fixed element on the positioning pin. [3] Knife sharpener according to claim 2, characterized by that the fastening element comprises a screw on which a pressure plate is integrally formed, and that the positioning pin has a threaded hole corresponding to the screw. [4] Knife sharpener according to claim 3, characterized by that the fastening element further comprises a first washer which is arranged between the pressure plate and the fixed element. [5] Knife sharpener according to claim 1, characterized by, that it further comprises an anti-slip ring, wherein the outer circumferential side of the turntable forms a second mounting groove into which the anti-slip ring is inserted and which projects outwards relative to the outer circumferential side of the turntable. [6] Knife sharpener according to claim 1, characterized by that it further comprises a magnetic element, wherein the turntable includes at least one magnetic bore spaced apart from the first mounting groove in which the magnetic element is arranged, and wherein the grinding blade is magnetically held on the magnetic element on the side of the turntable facing away from the handle. [7] Knife sharpener according to claim 6, characterized by that the opening of the magnetic bore is aligned towards the handle side. [8] Knife sharpener according to claim 6, characterized by, that the circumferential side of the turntable has a circumferential protrusion on the side facing away from the handle, the height of which is less than the thickness of the grinding blade, in order to determine its position on the turntable. [9] Knife sharpener according to claim 8, characterized by that the elevation has at least one indentation and that the rotating disc has a handle notch near the indentation. [10] Knife sharpener according to claim 1, characterized by , that it further has a second washer which is arranged on the positioning pin and clamped between the bearing and the handle part. [11] Knife sharpener according to claim 1, characterized by that symmetrical positioning pins are provided at both ends of the handle, and that a rotary disc, a bearing and a grinding blade are mounted at each end. [12] Knife sharpener according to claim 11, characterized by, that the outer circumferential surface of the middle part of the handle is recessed inwards and forms a grip groove. [13] A grinding device for machining the cutting edge of a tool, characterized by that it includes: a positioning device whose circumferential side has at least one mounting surface inclined on which a magnetic plate is mounted; and a knife sharpener that includes the following: a handle in which at least one end projects outwards in the middle and forms a positioning pin; a turntable whose center has a first mounting groove towards the handle side; a bearing that is permanently installed in the first mounting groove and fitted over the positioning pin, with the turntable positioned over the bearing with the Positioning pin is mounted on the handle; and a grinding blade located on the side of the turntable facing away from the handle; wherein the knife sharpener is arranged at a distance from a positioning device on the same processing platform, the blade is magnetically connected to a magnetic plate and positioned at an angle to the processing platform, and wherein the knife sharpener rests against the cutting edge and is rotated relative to it, so that the grinding blade grinds the cutting edge. [14] Knife sharpener according to claim 13, characterized by , furthermore comprising a fastening element, wherein the center of the turntable has a through-hole and the bearing comprises the following: a rotating section whose outer circumference rests against the first mounting groove and whose inner diameter corresponds to the size of the through-hole; and a fastening section onto which the rotating section is mounted, wherein the rotating section is rotatably and slidably connected to the fastening section, wherein the inner diameter of the fastening section corresponds to the size of the positioning pin and the fastening element penetrates the through-hole and the bearing, connects with the positioning pin and fixes the fastening section onto the positioning pin. [15] Knife sharpener according to claim 14, characterized by that the fastening element comprises a screw on which a pressure plate is integrally attached, and that the positioning pin has a threaded hole corresponding to the screw. [16] Knife sharpener according to claim 15, characterized by that the fastening element further comprises a first washer which is clamped between the pressure plate and the fastening section. [17] Knife sharpener according to claim 13, characterized by , that it further comprises an anti-slip ring, wherein the outer circumferential side of the turntable forms a recessed second mounting groove into which the anti-slip ring is inserted and protrudes relative to the outer circumferential side of the turntable. [18] Knife sharpener according to claim 13, characterized by , that it further comprises a magnetic element, wherein the turntable has at least one magnetic bore which is spaced apart from the first mounting groove, the magnetic element is received in the magnetic bore and the grinding blade is magnetically attracted to the magnetic element and held on the side of the turntable facing away from the handle side. [19] Knife sharpener according to claim 18, characterized by that the opening of the magnetic bore is aligned towards the handle side. [20] Knife sharpener according to claim 18, characterized by, that the edge of the turntable extends on the side facing away from the handle to a circumferential projection, the height of which is less than the thickness of the grinding blade and which determines the position of the grinding blade on the turntable. [21] Knife sharpener according to claim 20, characterized by that the projection has at least one recess, with a grip notch located near the recess on the turntable. [22] Knife sharpener according to claim 13, characterized by , that it further comprises a second washer which is placed on the positioning pin and is positioned between the bearing and the handle. [23] Knife sharpener according to claim 13, characterized by that the handle is symmetrically provided with the positioning pin at both ends and that the turntable, the bearing and the grinding blade are mounted at both ends. [24] Knife sharpener according to claim 23, characterized by, that the middle outer circumference of the handle is recessed inwards, creating a grip recess.

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