Knife sharpener with adjustable whetstone angle

Abstract

The application provides a knife sharpener with adjustable angle between two grinding stones, comprising a mounting base and a cover, the mounting base is provided with a linkage assembly and a grinding assembly, the grinding assembly comprises a fixed shaft, two grinding blocks and two grinding stones, the two grinding blocks are arranged in cross, the fixed shaft penetrates the middle part of each grinding block, the grinding stone is arranged at the first end of the grinding block, the linkage assembly is connected with the second end of the grinding block, the linkage assembly drives the two grinding blocks to rotate in opposite directions around the fixed shaft, and the linkage assembly comprises a knob; the cover is arranged on the mounting base, the cover is provided with a grinding opening and a sliding groove, the grinding stones are arranged in the grinding opening in cross, the knob is arranged in the sliding groove through the cover, and the knob can move to the grinding opening direction. The front and back movement of the knob drives the two grinding blocks to rotate in opposite directions around the fixed shaft, which is convenient for adjusting the angle between the two grinding stones, so as to adapt to various blade angle cutters, improve the grinding efficiency and prevent the wear of the blade.

Description

Technical Field

[0001] The invention relates to the field of knife sharpeners, in particular to a knife sharpener with an adjustable whetstone angle. Background Art

[0002] Existing knife sharpeners generally include roller-type sharpeners and those with cross-arranged whetstones. Roller-type sharpeners use the edge of a rolling whetstone to quickly rub the blade against the knife to achieve the desired sharpening effect. However, roller-type sharpeners are bulky, heavy, and inconvenient to carry. With cross-arranged whetstones, the user must place the blade of the knife between two cross-arranged whetstones, ensuring that both sides of the blade contact the whetstones. Then, the user must move the knife to sharpen the blade. However, the angle between the two whetstones in this sharpener is fixed, making it suitable only for knives with an equal blade angle and included angle. For knives with unequal blade angles, the whetstones only partially contact the blade, resulting in a smaller sharpening area. The user must constantly adjust the knife's insertion angle to ensure that both sides of the blade align with the corresponding whetstones. This is not only time-consuming and laborious, but also difficult to control the force and insertion angle of the knife during the sharpening process. Excessive force can easily wear the blade, affecting the quality of the sharpening. Summary of the Invention

[0003] The invention aims to provide a knife sharpener with an adjustable whetstone angle.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a sharpener with an adjustable whetstone angle, comprising a mounting seat and an upper cover, a linkage assembly and a sharpening assembly being provided on the mounting seat, the sharpening assembly comprising a fixed shaft, two sharpening blocks and two sharpening stones, the two sharpening blocks being arranged crosswise, the fixed shaft passing through the respective middle parts of the two sharpening blocks, the sharpening stone being arranged at the first end of the sharpening block, the linkage assembly being connected to the second end of the sharpening block, the linkage assembly driving the two sharpening blocks to rotate in opposite directions around the fixed shaft, the linkage assembly comprising a toggle member; the upper cover being provided on the mounting seat, the upper cover being provided with a sharpening mouth and a slide groove, the sharpening stone being crosswise arranged in the sharpening mouth, the toggle member passing through the upper cover and being arranged in the slide groove, and the toggle member being able to move toward the sharpening mouth.

[0005] It can be seen from the above scheme that when the toggle member moves back and forth, the two sharpening blocks are driven to rotate in opposite directions around the fixed axis through the linkage assembly, so that the two sharpening stones are relatively close to or away from the end away from the fixed axis, so as to adjust the angle between the two sharpening stones, which is conducive to adapting to various types and various edge angles of knives, which is beneficial to improving the sharpening efficiency and preventing blade wear.

[0006] A further solution is that the linkage assembly also includes a first translation member, a first rotating member, a second rotating member and two second translation members; the first translation member is respectively connected to the toggle member and the first rotating member, the first translation member is provided with a first rack, and the first rack extends along the moving direction of the toggle member; the first rotating member is provided with a first gear and a second gear, the first gear and the second gear are coaxially arranged, the second gear is located below the first gear, and the first gear is connected to the first rack; the second rotating member is provided with a third gear and a fourth gear, the third gear and the fourth gear are coaxially arranged, the third gear is located above the fourth gear, and the third gear is connected to the second gear; the two second translation members are arranged on both sides of the second rotating member, the first end of the second translation member is provided with a second rack, the second rack is connected to the fourth gear, and the second end of the second translation member is provided with a third rack; the second end of the sharpening block is provided with a fifth gear, and the fifth gear is connected to the third rack.

[0007] It can be seen from the above scheme that by setting the first translation member, the first rotating member, the second rotating member and the second translation member, the linear motion of the toggle member is first converted into the rotational motion of the four gears, and then converted into the reverse linear motion of the two second translation members. Then, the angle between the two grinding blocks is adjusted by the reverse linear motion of the two second translation members, and then the clamping between the two grindstones is adjusted to achieve the angle adjustability of the grindstone.

[0008] A further solution is that the mounting seat is provided with an enclosure portion, a first mounting groove and a fixed seat, the first mounting groove is arranged in the enclosure portion, and the first mounting groove extends along the moving direction of the toggle member; the fixed seat is arranged at one end of the first mounting groove, and the fixed seat is provided with a second mounting groove, a first mounting hole, a second mounting hole, a stop portion and a stop ring, the first mounting hole and the second mounting hole are respectively connected to the second mounting groove, the stop portion is arranged on the outside of the first mounting hole, the stop ring is coaxially arranged with the second mounting hole, and the stop ring protrudes upward from the top wall of the fixed seat.

[0009] A further solution is that the first rotating member is arranged in the first mounting hole, the first gear is located above the second mounting groove, the second gear is located in the second mounting groove, the first gear is provided with a first protrusion, the first protrusion protrudes outward from the peripheral wall of the first gear along the radial direction of the first gear, and the first protrusion rotates between the stop portion and the stop ring.

[0010] A further solution is that the toggle member includes an operating part and a fixed column, the operating part is provided with a third mounting groove, the third mounting groove is recessed from the top wall of the operating part toward the fixed column, the third mounting groove is provided with two first openings, the connecting line of the two first openings is perpendicular to the extension direction of the third mounting groove, the fixed column is provided with a fourth mounting groove, and the fourth mounting groove is provided on the outside of the fixed column.

[0011] A further solution is that the linkage assembly also includes a self-locking assembly, which includes a pressing member, a limiting member and an elastic member. The pressing member is arranged in the third mounting groove, the elastic member is connected between the bottom of the third mounting groove and the pressing member, the limiting member passes through the fixed column, and the end of the limiting member protrudes from the surface of the operating part from the first opening, and the limiting member can move up and down in the first opening.

[0012] It can be seen from the above scheme that by setting a pressing member and a limiting member to limit the movement of the toggle member, it is beneficial to fix the currently selected angle and prevent the angle between the two whetstones from changing during the sharpening process.

[0013] A further solution is that the upper cover includes a first cover body and a second cover body, the first cover body is provided with a accommodating cavity and two first grooves, the first groove is provided at an end away from the grinding edge, and the first groove is recessed from the side wall of the first cover body toward the accommodating cavity; the mounting seat is provided in the accommodating cavity, and the accommodating cavity is provided with a second opening upward, the second opening is connected to the accommodating cavity, and the second cover body is provided in the second opening.

[0014] A further solution is that the sharpening edge and the slide groove are both arranged on the second cover body, the bottom of the slide groove is provided with a first perforation, the first perforation is connected to the accommodating cavity, the side wall of the first perforation is provided with multiple limiting grooves, the notches of the limiting grooves are arranged downward, and the multiple limiting grooves are arranged along the moving direction of the toggle member.

[0015] It can be seen from the above scheme that by setting the limit groove and the limit member in conjunction with each other, it is beneficial to limit the movement of the toggle member, facilitate fixing the currently selected angle, and avoid the angle between the two whetstones changing during the sharpening process.

[0016] A further solution is that the number of sharpening assemblies is set to two, the two sharpening assemblies are a coarse grinding assembly and a fine grinding assembly respectively, the number of sharpening openings is equal to the number of sharpening assemblies, and the coarse grinding assembly and the fine grinding assembly are respectively arranged in the corresponding sharpening openings.

[0017] A further solution is that the mounting seat is further provided with a groove and an anti-slip pad, the groove is recessed upward from the bottom wall of the mounting seat, the groove extends along the moving direction of the toggle member, and the anti-slip pad is provided in the bottom wall of the mounting seat and the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0019] Figure 2 1 is an exploded view of an embodiment of the present invention.

[0020] Figure 3 It is an exploded view of the mounting base and linkage assembly in an embodiment of the present invention.

[0021] Figure 4It is an exploded view of some components of the linkage assembly in an embodiment of the present invention.

[0022] Figure 5 2 is a top view of an embodiment of the present invention.

[0023] Figure 6 yes Figure 5 Cross-sectional view of AA in the figure.

[0024] Figure 7 is a side view of an embodiment of the present invention.

[0025] Figure 8 yes Figure 7 Cross-sectional view of the BB.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0027] See also Figure 1 and Figure 2 The knife sharpener of this embodiment includes a mounting base 1 and an upper cover 2, wherein the upper cover 2 includes a first cover body 21 and a second cover body 22. For the convenience of description, the width direction of the knife sharpener is set as the X direction, the length direction of the knife sharpener is set as the Y direction, and the height direction of the knife sharpener is set as the Z direction.

[0028] The first cover 21 is provided with a accommodating cavity 211, a second opening 212, a third opening 213, and two supporting grooves 215. The second opening 212 and the third opening 213 are arranged in a vertically opposed relationship and are both connected to the accommodating cavity 211. The second cover 22 is arranged within the second opening 212. A plurality of engaging platforms 214 are arranged around the first opening 215. The second cover 22 is also provided with a plurality of hooks 221, the number of which is equal to the number of engaging platforms 214. The hooks 221 are connected to the engaging platforms 214 to achieve a fixed connection between the second cover 22 and the first cover 21. The supporting grooves 215 are recessed from the sidewall surface of the first cover 21 into the accommodating cavity 211. The two supporting grooves 215 are arranged in a corresponding manner, allowing the user to press the supporting grooves 215 with their fingers to fix the position of the sharpener.

[0029] The first end of the second cover 22 is provided with two sharpening openings 222, which are arranged along the Y direction. The second end of the second cover 22 is provided with a slide groove 223, which extends along the Y direction. The sharpening openings 222 and the slide groove 223 are respectively connected to the accommodating cavity 211. The mounting base 1 is disposed within the third opening 213. The mounting base 1 is provided with a linkage assembly 3 and two sharpening assemblies, and the linkage assembly 3 and the sharpening assemblies are both located within the accommodating cavity 211.

[0030] See also Figure 3 and Figure 4 , and combined with Figure 2 The mounting seat 1 is provided with an enclosure portion 11, a first mounting groove 12 and a fixed seat 13. The first mounting groove 12 is arranged in the enclosure portion 11, and the first mounting groove 12 extends along the Y direction. The two sharpening assemblies are arranged in the first mounting groove 12 along the Y direction. In the Z direction, the two sharpening assemblies have different height positions. The two sharpening assemblies are respectively a fine grinding assembly 4 and a coarse grinding assembly 6. The fine grinding assembly 4 includes a fixed shaft 41, two sharpening blocks 42 and two sharpening stones 43. The two sharpening blocks 42 are cross-arranged with their respective middle parts as the intersection point. The fixed shaft 41 passes through the respective middle parts of the two sharpening blocks 42. The end of the fixed shaft 41 is connected to the side wall of the first mounting groove 12, and the sharpening stone 43 can rotate around the fixed shaft 41. The sharpening stone 43 is arranged on the first end of the sharpening block 42, and the two sharpening stones 43 are cross-arranged in the corresponding sharpening mouth 222. A fifth gear 421 is mounted on the second end of the sharpening block 42. This gear 421 is a sector gear with its teeth facing downward, and is rotatable about the fixed shaft 41. The coarse grinding assembly 6 and the fine grinding assembly 4 share the same structure and will not be further described here. The difference between the coarse grinding assembly 6 and the fine grinding assembly 4 lies in the different materials used for the whetstone 43. The whetstone 43 in the coarse grinding assembly 6 is made of hard metal, while the whetstone 43 in the fine grinding assembly 4 is made of ceramic.

[0031] The fixing seat 13 is arranged on the end of the enclosure portion 11 away from the sharpening assembly and is located above the first mounting groove 12. The side walls of the enclosure portion 11 are respectively provided with a boss portion 111 and an avoidance hole 112. The boss portion 111 protrudes outward from the outer surface of the enclosure portion 11, and the avoidance hole 112 penetrates the side wall of the enclosure portion 11 along the X direction. The avoidance hole 112 is located above the boss portion 111. The fixing seat 13 includes a first top wall 131, a first side wall 132, and a second side wall 133. The first side wall 132 and the second side wall 133 are arranged parallel to each other along the X direction. The first top wall 131 is arranged between the first side wall 132 and the second side wall 133. A second mounting groove 134 is formed between the first top wall 131, the first side wall 132, and the second side wall 133. The second mounting groove 134 is connected to the first mounting groove 12 from top to bottom. The first side wall 132 and the second side wall 133 are respectively provided with a through hole 135, and the boss portion 111 is inserted into the through hole 135. The bottom wall of the boss portion 111 is adjacent to the hole wall of the through hole 135 above and below, which serves to limit the separation of the fixing seat 13 from the enclosure portion 11. The first top wall 131 is provided with a first mounting hole 136, a second mounting hole 137, a stop portion 138, a stop ring 139 and an avoidance groove 130. The first mounting hole 136 and the second mounting hole 137 are arranged along the Y direction. The first mounting hole 136 and the second mounting hole 137 are respectively connected to the second mounting groove 134. The stop portion 138 is provided on the outer edge of the first mounting hole 136, and the stop ring 139 is provided coaxially with the second mounting hole 137. The stop ring 139 protrudes upward from the first top wall 131, and a preset space is provided between the stop portion 138 and the stop ring 139. The avoidance groove 130 is provided on a side of the first mounting hole 136 away from the stop portion 138 . The avoidance groove 130 extends along the Y direction. The avoidance groove 130 is recessed downward from the surface of the first top wall 131 .

[0032] The linkage assembly 3 includes a toggle member 31, a first translation member 32, a first rotation member 33, a second rotation member 34, and two second translation members 35. The upper portion of the toggle member 31 is disposed in the slide groove 223, and the lower portion of the toggle member 31 extends through the second cover body 22 into the accommodating cavity 211. The toggle member 31 can move back and forth along the Y direction within the slide groove 223. The first translation member 32 includes a second top wall 321 and a third side wall 322. The second top wall 321 is arranged horizontally, and the third side wall 322 is perpendicular to the second top wall 321. The toggle member 31 is connected to the second top wall 321. The third side wall 322 is disposed in the avoidance groove 130. The third side wall 322 does not directly contact the groove bottom of the avoidance groove 130. The third side wall 322 is provided with a first rack 323, and the first rack 323 extends along the Y direction.

[0033] The first rotating member 33 is disposed within the first mounting hole 136 and is provided with a first gear 331 and a second gear 332. The first gear 331 and the second gear 332 are coaxially arranged. The first gear 331 is located on the first top wall 131, and the second gear 332 is located within the second mounting groove 134. The first gear 331 is a sector gear connected to the first rack 323. A first protrusion 333 is provided on the side of the first gear 331 away from the first rack 323. The first protrusion 333 protrudes outward from the peripheral wall of the first gear 331 in the radial direction of the first gear 331. The first protrusion 333 is respectively adjacent to the stopper 138 and the stop ring 139, allowing the first protrusion 333 to rotate between the stopper 138 and the stop ring 139.

[0034] The second rotating member 34 is disposed within the second mounting hole 137 and is equipped with a third gear 341 and a fourth gear 342. The third gear 341 and the fourth gear 342 are coaxially arranged, with the third gear 341 positioned above the fourth gear 342. The third gear 341 is connected to the second gear 332. The third gear 341 is a sector gear and is equipped with a second protrusion 343. The second protrusion 343 protrudes outward from the peripheral wall of the third gear 341 in the radial direction of the third gear 341. The second protrusion 343 abuts against a side wall of the avoidance hole 112, thereby limiting the rotation of the second rotating member 34.

[0035] Two second translating members 35 are disposed parallel to each other within the first mounting slot 12. A second rack 351 is disposed at the first end of the second translating member 35, extending along the Y direction. The second rotating member 34 is positioned between the two second racks 351, which are connected to the fourth gear 342. Two third racks 352 are disposed at the second end of the second translating member 35, which are positioned below the corresponding fifth gear 421 and connected to the fifth gear 421.

[0036] exist Figure 4 In the embodiment, the toggle member 31 includes an operating portion 311 and a fixed post 312. The fixed post 312 is located below the operating portion 311. The operating portion 311 is provided with a third mounting slot 313, which is recessed from the top wall of the operating portion 311 toward the interior of the fixed post 312 along the Z-direction. A step portion 314 is provided at the middle portion of the third mounting slot 313 in the Z-direction, protruding from the slot wall toward the center of the third mounting slot 313. The third mounting slot 313 is provided with two first openings 315, the line connecting the two first openings 315 being perpendicular to the extension direction of the third mounting slot 313, and the first opening 315 being located below the step portion 314. A fourth mounting slot 316 is provided below the fixed post 312. The fourth mounting slot 316 is disposed on the outside of the fixed post 312 and is configured to connect to the second top wall 321.

[0037] The linkage assembly 3 also includes a self-locking assembly 5, which includes a pressing member 51, a limiting member 52, and an elastic member 53. The pressing member 51 is disposed within the third mounting slot 313 and includes a pressing portion 511, a column 512, and a connecting column 513. The column 512 is disposed between the pressing portion 511 and the connecting column 513. The pressing portion 511 is disposed on a step portion 314, and the column 512 extends through the step portion 314 to the bottom of the third mounting slot 313. The elastic member 53 is connected between the bottom of the third mounting slot 313 and the column 512. The elastic member 53 is a spring, and the upper end of the elastic member 53 is sleeved on the connecting column 513. A second through-hole 514 is provided through the column 512, extending along the X-direction. The limiting member 52 passes through the first opening 315 and is inserted into the second through hole 514 . Both ends of the limiting member 52 protrude from the surface of the operating portion 311 . The cross section of the limiting member 52 is a combination of a triangle and a rectangle, with the triangle located above the rectangle.

[0038] See also Figure 5 and Figure 6 , and combined with Figure 2 The bottom of the chute 223 is provided with a first through-hole 224, which communicates with the accommodating cavity 211. Three stopper slots 225 are provided on either side of the first through-hole 224 in the X direction, arranged along the Y direction. The stopper slots 225 have a triangular cross-section, with the notches facing downward. The stopper 52 is selectively positioned within one of the stopper slots 225, restricting the movement of the toggle member 31 in the Y direction. Indicator arrows 226 are provided on either side of the chute 223 in the X direction, and the top wall of the toggle member 31 is provided with a numerical value indicating the included angle (not shown). The indicator arrows 226 indicate the current included angle, making it easier for the user to adjust and select the appropriate included angle. In this embodiment, the included angles include 15°, 20°, and 25°, each corresponding to one of the stopper slots 225.

[0039] See also Figure 7 and Figure 8 A barrier portion 121 is provided within the first mounting groove 12. The barrier portion 121 is located in the middle of the first mounting groove 12 and extends along the Y direction. In the Z direction, the height of the barrier portion 121 is less than the height of the side walls of the first mounting groove 12. A second translating member 35 is disposed between the barrier portion 121 and the groove walls. Two third protrusions 353 are provided on the side of the second translating member 35 facing the groove walls. The two third protrusions 353 are arranged in the Z direction and extend along the Y direction. The third protrusions 353 abut the groove walls to reduce the contact area between the second translating member 35 and the groove walls, thereby reducing friction.

[0040] Mounting base 1 is further provided with a groove 14 and an anti-slip pad 15. Groove 14 has an inverted V-shaped cross-section and is recessed upward from the bottom wall of mounting base 1, extending along the Y-direction. Anti-slip pad 15 is provided on the bottom wall of mounting base 1 and the groove wall of groove 14. Anti-slip pad 15 is made of rubber and provides protection.

[0041] The working principle of this embodiment is as follows: the pressing member 51 is pressed, causing the limiting member 52 to separate from the limiting groove 225. While the pressing member 51 remains pressed, the toggle member 31 is pushed toward the sharpening edge 222. At this time, the toggle member 31 drives the first rotating member 33 to rotate counterclockwise via the first translating member 32, which in turn drives the second rotating member 34 to rotate clockwise, causing the fourth gear 342 to simultaneously drive the two second translating members 35 to move in opposite directions, causing the two whetstones 43 on the same sharpening assembly to move toward each other, thereby reducing the angle between the two whetstones 43. At this time, the pressing member 51 can be released, allowing the limiting member 52 to automatically enter the limiting groove 225 under the action of the elastic member 53, achieving a self-locking effect, preventing the angle between the two whetstones 43 from changing due to excessive force during the sharpening process. Conversely, when the toggle member 31 is pushed away from the sharpening edge 222, the angle between the two whetstones 43 can be increased.

[0042] In summary, the present invention sets a linkage component, and when the toggle member moves back and forth, it drives the two sharpening blocks to rotate in opposite directions around the fixed axis, so that the angle between the two sharpening stones can be adjusted, which is conducive to adapting to various types and various cutting angles of knives, which is beneficial to improving the sharpening efficiency and preventing blade wear.

[0043] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A knife sharpener with an adjustable whetstone angle, comprising: A mounting seat is provided with a linkage assembly and a sharpening assembly, the sharpening assembly comprising a fixed shaft, two sharpening blocks and two sharpening stones, the two sharpening blocks are arranged crosswise, the fixed shaft passes through the middle of each of the two sharpening blocks, the sharpening stones are arranged at the first ends of the sharpening blocks, the linkage assembly is connected to the second ends of the sharpening blocks, the linkage assembly drives the two sharpening blocks to rotate in opposite directions around the fixed shaft, and the linkage assembly comprises a toggle member; An upper cover, the upper cover being arranged on the mounting seat, the upper cover being provided with a sharpening opening and a chute, the whetstone being arranged crosswise in the sharpening opening, the toggle member passing through the upper cover and arranged in the chute, the toggle member being capable of linearly moving toward the sharpening opening; The linkage assembly also includes a first translation member, a first rotating member, a second rotating member and two second translation members; the first translation member is connected to the toggle member and the first rotating member respectively, the first translation member is provided with a first rack, and the first rack extends along the moving direction of the toggle member; the first rotating member is provided with a first gear and a second gear, the first gear and the second gear are coaxially arranged, the second gear is located below the first gear, and the first gear is connected to the first rack; the second rotating member is provided with a third gear and a fourth gear, the third gear and the fourth gear are coaxially arranged, the third gear is located above the fourth gear, and the third gear is connected to the first rack. The wheel is connected to the second gear; two second translation members are arranged on both sides of the second rotating member, a second rack is provided at the first end of the second translation member, the second rack is connected to the fourth gear, and a third rack is provided at the second end of the second translation member; a fifth gear is provided at the second end of the sharpening block, and the fifth gear is connected to the third rack, the toggle member drives the first rotating member to rotate through the first translation member, and then drives the second rotating member to rotate, so that the fourth gear simultaneously drives the two second translation members to move, so that the two whetstones on the same sharpening assembly move towards each other to adjust the angle between the two whetstones; The mounting seat is provided with a blocking portion, a first mounting groove and a fixing seat, the first mounting groove is provided in the blocking portion, and the first mounting groove extends along the moving direction of the toggle member; the fixing seat is provided at one end of the first mounting groove, the fixing seat is provided with a second mounting groove, a first mounting hole, a second mounting hole, a stopping portion and a stopping ring, the first mounting hole and the second mounting hole are respectively communicated with the second mounting groove, the stopping portion is provided on the outer side of the first mounting hole, the stopping ring is coaxially arranged with the second mounting hole, and the stopping ring protrudes upward from the top wall of the fixing seat; The toggle member includes an operating portion and a fixed column, the operating portion is provided with a third mounting groove, the third mounting groove is recessed from the top wall of the operating portion toward the fixed column, the third mounting groove is provided with two first openings, the line connecting the two first openings is perpendicular to the extension direction of the third mounting groove, the fixed column is provided with a fourth mounting groove, the fourth mounting groove is provided on the outer side of the fixed column; The linkage assembly also includes a self-locking assembly, which includes a pressing member, a limiting member and an elastic member. The pressing member is arranged in the third mounting groove, the elastic member is connected between the bottom of the third mounting groove and the pressing member, the limiting member passes through the fixed column, and the end of the limiting member protrudes from the surface of the operating part from the first opening, and the limiting member can move up and down in the first opening.

2. The knife sharpener according to claim 1, characterized in that: The first rotating member is arranged in the first mounting hole, the first gear is located above the second mounting groove, the second gear is located in the second mounting groove, the first gear is provided with a first protrusion, the first protrusion protrudes outward from the peripheral wall of the first gear along the radial direction of the first gear, and the first protrusion rotates between the stop portion and the stop ring.

3. The knife sharpener according to claim 1, characterized in that: The upper cover includes a first cover body and a second cover body, the first cover body is provided with a receiving cavity and two first grooves, the first grooves are provided at an end away from the sharpening edge, and the first grooves are recessed from the side wall of the first cover body toward the receiving cavity; The mounting seat is arranged in the accommodating cavity. The accommodating cavity is upwardly provided with a second opening, the second opening is communicated with the accommodating cavity, and the second cover is arranged in the second opening.

4. The knife sharpener according to claim 3, characterized in that: The sharpening edge and the slide groove are both arranged on the second cover body, the bottom of the slide groove is provided with a first perforation, the first perforation is connected to the accommodating cavity, the side wall of the first perforation is provided with a plurality of limiting grooves, the notches of the limiting grooves are arranged downward, and the plurality of limiting grooves are arranged along the moving direction of the toggle member.

5. The knife sharpener according to any one of claims 1 to 4, characterized in that: The number of the sharpening assemblies is set to two, and the two sharpening assemblies are respectively a coarse grinding assembly and a fine grinding assembly. The number of the sharpening ports is equal to the number of the sharpening assemblies, and the coarse grinding assembly and the fine grinding assembly are respectively arranged in the corresponding sharpening ports.

6. The knife sharpener according to any one of claims 1 to 4, characterized in that: The mounting seat is further provided with a groove and an anti-slip pad, wherein the groove is recessed upward from the bottom wall of the mounting seat and extends along the moving direction of the toggle member, and the anti-slip pad is provided in the bottom wall of the mounting seat and the groove.

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