Knife sharpener achieving reciprocating knife sharpening function through hand-operated connecting rod mechanism

Abstract

According to the knife sharpener, the reciprocating knife sharpening function is achieved through the hand-operated connecting rod mechanism. Comprising a shell, a knife sharpening mechanism and a connecting rod mechanism, a rotating disc is rotatably arranged on one side wall of the shell, a foldable rocking handle is eccentrically arranged on the rotating disc, and the connecting rod mechanism for driving the knife sharpening mechanism to reciprocate through the rotating disc is arranged in an inner cavity of the shell. A cutter is inserted from the front end of the shell, and the cutter sharpening mechanism reciprocates along the cutting edge to achieve cutter sharpening. According to the knife sharpener capable of achieving the reciprocating knife sharpening function through the hand-operated connecting rod mechanism, the rotary motion of the rotary disc is converted into the reciprocating linear motion of the knife sharpening mechanism through the hand-operated connecting rod mechanism, the knife is sharpened through the reciprocating motion of the knife sharpening mechanism relative to the knife, and a user can use the knife sharpener to sharpen the knife. And the knife sharpening piece can be driven to actively fit the knife edge for grinding only by rotating the rocking handle which can be folded and stored in the rotary storage groove, so that the fatigue and aching pain of arms are greatly reduced, and the use is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of knife sharpeners, and more particularly to a knife sharpener that achieves reciprocating sharpening function through a hand-cranked linkage mechanism. Background Technology

[0002] Knives are an essential tool in every household kitchen. With societal development, people have higher demands for kitchen tools. For knives, which are used almost daily, knife sharpeners are widely known. Due to daily use, knife blades wear down, becoming dull, making regular sharpening essential.

[0003] Commonly used sharpening tools are whetstones or sharpening tools. Both require the user to hold the knife and repeatedly push and pull it along the surface of the whetstone or the sharpening groove of the sharpening tool to make the blade contact and rub against the whetstone or sharpening tool to achieve the sharpening effect. During the sharpening process, appropriate force needs to be applied to ensure full contact between the blade and the whetstone or sharpening tool. Therefore, this method is relatively strenuous and can easily cause arm fatigue and soreness. It also requires a certain level of skill and is prone to uneven sharpening, as well as accidental cuts and scratches, making it somewhat inconvenient to use.

[0004] Therefore, it is necessary to provide a sharpening tool that achieves reciprocating sharpening function through a hand-cranked linkage mechanism to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a knife sharpener that achieves reciprocating sharpening through a hand-cranked linkage mechanism, solving the problems of existing knife sharpening methods that require manual pushing and pulling of the tool, are laborious, easily cause scratches, and are inconvenient to use.

[0006] To solve the above-mentioned technical problems, the present invention provides a sharpening device that realizes reciprocating sharpening function through a hand-cranked linkage mechanism, comprising a housing, a sharpening mechanism, and a linkage mechanism. The housing includes a left housing and a right housing that are spliced ​​together. The inner cavity of the housing is provided with a sharpening mechanism that can move along the length of the housing. A rotating disk is rotatably disposed on one side wall of the housing. A foldable crank is eccentrically disposed on the rotating disk. The inner cavity of the housing is provided with a linkage mechanism that drives the sharpening mechanism to reciprocate through the rotating disk. The cutting tool is inserted from the front end of the housing and sharpened by the reciprocating motion of the sharpening mechanism along the cutting edge.

[0007] Preferably, a first fixing plate and a second fixing plate are respectively provided at the front end and the rear end of the inner cavity of the housing, and multiple slide rods are provided between the first fixing plate and the second fixing plate. The multiple slide rods form a hollow frame structure, and the grinding mechanism moves along the slide rods.

[0008] Preferably, the sharpening mechanism includes a movable frame, two guide rods are vertically arranged inside the movable frame, a sharpening frame that can slide and rise along the guide rods is arranged inside the movable frame, a sharpening groove is formed at the top of the sharpening frame, and sharpening rods that are arranged alternately on both sides of the sharpening groove inside the sharpening frame are respectively arranged inside the sharpening frame. A spring is provided on the guide rod to press the sharpening frame upward. The sharpening mechanism is connected to the linkage mechanism through the movable frame.

[0009] Preferably, the inner cavity of the sharpening frame has inclined receiving grooves on the left and right sides of the sharpening groove, the bottom ends of the two receiving grooves are staggered in the front-to-back direction, the two sharpening rods are respectively located in one of the receiving grooves to form an X-shaped structure with staggered front-to-back, and each receiving groove is provided with an elastic element that pushes the sharpening rods toward the sharpening groove.

[0010] Preferably, the rotating disk is rotatably mounted on the right housing, and a storage groove is recessed inward on the outer side of the rotating disk. One end of the storage groove is provided with a mounting position, and a connecting seat is rotatably mounted in the mounting position. One end of the crank handle is mounted to the connecting seat by a rotating pin, and the crank handle can be stored in the storage groove when it is rotated inward.

[0011] Preferably, the linkage mechanism includes a fixed wheel, a driving link, a driven link, and a rotating wheel. The fixed wheel is coaxial with the rotating disk and is fixedly installed on the inner wall of the housing. One end of the driving link is fixedly installed in a fixed groove at the axis center inside the rotating disk through a connecting block and rotates coaxially with the rotating disk. The other end of the driving link is coaxially hinged to the rotating shaft of one end of the driven link through a rotating hole. A rotating wheel coaxial with the rotating shaft is provided at the connection between the driving link and the driven link. The driven link is fixedly connected to the rotating wheel through the rotating shaft. The rotating wheel is driven by the fixed wheel through a belt.

[0012] The linkage mechanism further includes a guide frame and a movable seat. The guide frame is arranged along the length of the housing. The movable seat is rotatably connected to the other end of the driven link and moves along the guide frame under its drive. The linkage mechanism reciprocates with the grinding mechanism through the movable seat.

[0013] Preferably, a limiting mechanism is provided on the upper part of the inner side of the first fixing plate. The limiting mechanism includes a mounting plate, a guide plate is fixedly connected to the bottom of the mounting plate, a plurality of mounting slots are provided on the top of the guide plate, a magnet for adsorbing the cutting tool is provided in the mounting slot, and a cutting tool slot is provided on the bottom of the guide plate along the length direction of the housing.

[0014] Preferably, it further includes a collection cover, wherein a collection cover guide groove for pulling out the collection cover is provided at the bottom of the rear end of the housing, an elastic retaining bead is provided at the bottom of the collection cover, a retaining bead positioning groove for locking the elastic retaining bead is provided at the bottom of the inner wall of the housing, and a support piece for supporting the collection cover guide groove is provided in the inner cavity of the housing.

[0015] Compared with related technologies, the sharpening tool provided by this invention, which achieves reciprocating sharpening function through a hand-cranked linkage mechanism, has the following advantages:

[0016] This invention provides a knife sharpener that achieves reciprocating sharpening function through a hand-cranked linkage mechanism. The rotational motion of the rotating disk is converted into the reciprocating linear motion of the sharpening mechanism through the hand-cranked linkage mechanism. The sharpening mechanism sharpens the knife through its reciprocating motion relative to the knife. Users do not need to hold the knife and repeatedly push, pull, and rub it. They only need to turn the crank handle, which can be folded and stored in the rotating storage slot, to drive the sharpening element to actively fit the blade for sharpening, greatly reducing arm fatigue and soreness. The sharpening frame in the moving frame of the sharpening mechanism is designed to be raised and lowered through guide rods and springs. The spring force keeps the sharpening frame always in contact with the blade. With the X-shaped staggered sharpening rods held in place by the elastic element in the receiving slot, it can automatically adapt to knives of different widths, thicknesses, and blade angles without manual adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the sharpening tool provided by the present invention, which achieves reciprocating sharpening through a hand-cranked linkage mechanism;

[0018] Figure 2 This is a schematic diagram of the connection structure between the crank handle and the rotating disk in this invention;

[0019] Figure 3 This is an exploded view of the connection structure between the crank and the rotating disk in this invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the limiting mechanism in this invention;

[0022] Figure 6 for Figure 5 The diagram shows the structure of the limiting plate.

[0023] Figure 7 for Figure 6 A schematic diagram of the bottom structure of the limiting plate shown;

[0024] Figure 8 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 9This is a schematic diagram showing the position of the linkage mechanism in this invention;

[0026] Figure 10 This is a schematic diagram of the linkage mechanism in this invention;

[0027] Figure 11 for Figure 10 A schematic diagram of the disassembled linkage mechanism shown;

[0028] Figure 12 This is a schematic diagram of the grinding mechanism in this invention;

[0029] Figure 13 for Figure 12 The diagram shows the internal structure of the grinding frame.

[0030] Figure 14 This is a schematic diagram showing the location of the collection cover in this invention;

[0031] Figure 15 This is a schematic diagram of the overall structure of the crank handle when it is folded in this invention;

[0032] Figure 16 This is a schematic diagram of another embodiment of the grinding mechanism in this invention.

[0033] Numbered in the diagram: 1. Housing, 11. Left Housing, 12. Right Housing, 13. Front Decorative Cover, 14. Decorative Cover, 15. Collection Cover Guide Groove, 16. Bead Positioning Groove, 17. Support Plate, 18. Collection Cover, 2. Linkage Mechanism, 21. Fixed Wheel, 22. Driving Linkage, 23. Driven Linkage, 24. Guide Frame, 25. Movable Seat, 26. Rotating Wheel, 27. Belt, 28. Connecting Block, 3. Rotating Disc, 31. Connecting Seat, 32. Rotating Pin, 33. Fixed Groove 34. Fixing clip; 35. Storage slot; 4. Handle; 6. First fixing plate; 61. First fixing sleeve; 7. Second fixing plate; 71. Second fixing sleeve; 8. Limiting mechanism; 81. Mounting plate; 82. Guide plate; 83. Mounting slot; 84. Magnet; 85. Knife slot; 9. Sharpening mechanism; 91. Moving frame; 92. Guide rod; 93. Spring; 94. Sharpening frame; 95. Sharpening wheel; 96. Sharpening rod; 97. Elastic element; 98. Receiving slot; 10. Slide rod. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] First Embodiment

[0036] Please refer to the following: Figure 1-15A knife sharpener that achieves reciprocating sharpening via a hand-cranked linkage mechanism includes a housing 1, a sharpening mechanism 9, and a linkage mechanism 2. The housing 1 includes a left housing 11 and a right housing 12 that are joined together. The inner cavity of the housing 1 is provided with a sharpening mechanism 9 that can move along the length of the housing 1. A rotating disk 3 is rotatably provided on one side wall of the housing 1. A foldable crank handle 4 is eccentrically provided on the rotating disk 3. The inner cavity of the housing 1 is provided with a linkage mechanism 2 that drives the sharpening mechanism 9 to reciprocate through the rotating disk 3. The knife is inserted from the front end of the housing 1 and sharpened by the reciprocating motion of the sharpening mechanism 9 along the blade edge.

[0037] The housing 1 is composed of a left housing 11 and a right housing 12. A front decorative cover 13 and a rear decorative cover 14 are respectively provided at the front and rear ends. The front decorative cover 13 has a slot for inserting a knife from the front end.

[0038] The directional terms such as front-end and back-end used in the following text are all based on the aforementioned front-end and back-end.

[0039] After the knife is inserted from the front end, the handle 4 on the rotating disk 3 is opened, and the rotating disk 3 is rotated by holding the handle and rotating it. This, in turn, drives the sharpening mechanism 9 to reciprocate through the linkage mechanism 2. The sharpening components in the sharpening mechanism 9 grind the cutting edge back and forth to achieve the sharpening function.

[0040] Please refer to Figure 4 and 8 The front end and rear end of the inner cavity of the housing 1 are respectively provided with a first fixing plate 6 and a second fixing plate 7. Multiple slide rods 10 are provided between the first fixing plate 6 and the second fixing plate 7. The multiple slide rods 10 form a hollow frame structure. The grinding mechanism 9 moves along the slide rods 10.

[0041] Multiple first fixing sleeves 61 and multiple second fixing sleeves 71 are respectively provided on the opposite surfaces of the first fixing plate 6 and the second fixing plate 7, and they are opposite each other in pairs. The two ends of multiple slide rods 10 are respectively fixed in a first fixing sleeve 61 and a second fixing sleeve 71. The multiple slide rods 10 form a hollow frame structure that supports and guides the sharpening mechanism 9. The cutting tool can be inserted into the cavity of the frame structure and sharpened by the sharpening mechanism 9.

[0042] Please refer to Figure 12The sharpening mechanism 9 includes a movable frame 91, with two guide rods 92 vertically arranged inside the movable frame 91. A sharpening frame 94, which can slide and rise along the guide rods 92, is arranged inside the movable frame 91. A sharpening groove is formed downward at the top of the sharpening frame 94. Inside the sharpening frame 94, sharpening rods 96 are respectively arranged on both sides of the sharpening groove. A spring 93 is arranged on the guide rod 95 to press the sharpening frame 94 upward. The sharpening mechanism 9 is connected to the linkage mechanism 2 through the movable frame 91.

[0043] The four corners of the movable frame 91 are provided with sliding sleeves, which are respectively fitted onto the slide rod 10, so that the sharpening mechanism 9 can slide smoothly along the slide rod 10.

[0044] Because the width of the cutting tools is inconsistent, the height of the cutting edge is also different after the tools are inserted into the housing 1. In order to accommodate tools of different widths, the sharpening frame 94 is designed as a height-adjustable structure, as follows:

[0045] The sharpening frame 94 has movable sleeves on both sides that are adapted to the guide rod 92. A spring 93 is installed on the guide rod 92 at the bottom of the sharpening frame 94. The spring 93 is always in a compressed state, which creates a tendency to push the sharpening frame 94 upward. When the knife is inserted into the housing 1 and begins to contact the sharpening rod 96 in the sharpening mechanism 9, it will squeeze the sharpening frame 94 downward. Under the elastic force of the spring 93, the sharpening frame 94 tends to move upward, so that the sharpening rod 96 in the sharpening frame 94 is always pressed against the blade, thereby ensuring the contact and friction effect and adapting to knives of different widths.

[0046] In this embodiment, the device is suitable for knives with a certain curvature or tip at the end, so that when the knife is inserted, the tip first enters the grinding groove, and the curvature of the blade gradually presses down on the grinding frame 94, preventing the knife from being unable to be inserted into the grinding groove due to an excessively wide front end, thus affecting normal grinding operations. For knives with relatively straight ends, a slope that is lower at the front and higher at the back can be provided on the front side of the grinding frame 94 to guide the blade, allowing the blade to be inserted into the grinding groove.

[0047] After the knife is inserted into the housing 1, the cutting edge is exactly on the moving path of the sharpening groove of the sharpening mechanism 9. When the sharpening mechanism 9 moves back and forth, the sharpening rod 96 inside it will repeatedly rub against both sides of the cutting edge to achieve sharpening.

[0048] Please refer to Figure 13 The inner cavity of the grinding frame 94 has inclined receiving grooves 98 on the left and right sides of the grinding groove, and the two receiving grooves 98 are staggered in the front-back direction. Figure 13This is a rendering of the internal structure of the outer shell of the sharpening frame 94 on the side away from the reader. Therefore, the outer shell of the sharpening frame 94 facing the reader and one of the receiving grooves 98 are not visible. The bottom ends of the two receiving grooves 98 are staggered in the front-to-back direction. The two sharpening rods 96 are respectively located in one of the receiving grooves 98, forming a staggered X-shaped structure. The cutting edge of the knife is in contact with the upper part of the intersection. Each receiving groove 98 is provided with an elastic element 97 that pushes the sharpening rod 96 towards the sharpening groove.

[0049] In this embodiment, since the thickness and blade angle of different knives are different, a sharpening rod 96 with a fixed angle cannot guarantee a close fit to the blade. Therefore, a sharpening rod 96 structure is provided that can be pushed slightly in the receiving groove 98 by the elastic element 97. When the knife is inserted into the sharpening groove and comes into contact with the sharpening element 96, it will exert a squeezing effect on the sharpening rod 96. At the same time, the sharpening rod 96 is also subjected to the elastic force of the elastic element 97, which allows the sharpening rod 96 to make a slight displacement to adapt to blades of different widths and angles, thus ensuring the sharpening effect.

[0050] A limiting block is provided at the top of the receiving groove 98 near the grinding groove to limit the grinding rod 96 and prevent the grinding rod 96 from falling off under the elastic force of the elastic element 97.

[0051] Please refer to Figure 1-3 The rotating disk 3 is rotatably mounted on the right housing 12. A storage groove 35 is recessed inward on the outer side of the rotating disk 3. A mounting position is provided at one end of the storage groove 35. A connecting seat 31 is rotatably mounted in the mounting position. One end of the rocker 4 is mounted to the connecting seat 31 by a rotating pin 32. When the rocker 4 is rotated inward, it can be stored in the storage groove 35.

[0052] The storage slot 35 is arranged along one diameter direction of the rotating disk 3, and the connecting seat 31 is arranged at one end of the storage slot 35. A pair of fixing clips 34 for limiting the connecting seat 31 are arranged on the inner side of the rotating disk 3.

[0053] The crank 4 rotates around the connecting seat 31 to open and fold. It can only rotate within a 90° range and cannot rotate to the sides. When folded, it fits perfectly into the storage slot 35. When opened, it is perpendicular to the storage slot 35.

[0054] The linkage mechanism 2 includes a fixed wheel 21, a driving link 22, a driven link 23, and a rotating wheel 26. The fixed wheel 21 is coaxial with the rotating disk 3 and is fixedly installed on the inner wall of the housing 1. One end of the driving link 22 is fixedly installed in the fixing groove 33 at the axis center inside the rotating disk 3 through a connecting block 28 and rotates coaxially with the rotating disk 3. The other end of the driving link 22 is coaxially hinged to the rotating shaft at one end of the driven link 23 through a rotating hole. A rotating wheel 26 coaxial with the rotating shaft is provided at the connection between the driving link 22 and the driven link 23. The driven link 23 is fixedly connected to the rotating wheel 26 through the rotating shaft. The rotating wheel 26 is driven by the fixed wheel 21 through a belt 27.

[0055] A fixing groove 33 is provided at the center of the inner side of the rotating disk 3. The connecting block 28 is adapted to the fixing groove 33. The fixing wheel 21 has a ring structure. The connecting block 28 passes through the through hole in the middle of the fixing wheel 21 and is fixedly installed in the fixing groove 33, so that the active connecting rod 22 can rotate synchronously with the rotating disk 3.

[0056] One end of the driven link 23 is provided with a rotating shaft, which is rotatably connected to the driving link 22. The rotating wheel 26 is fixedly connected to the rotating shaft. When the driving link 22 rotates under the drive of the rotating disk 3, the rotating wheel 26 makes a circular motion relative to the fixed wheel 21. Under the traction of the belt 27, the rotating wheel 26 itself also rotates, that is, it revolves around the fixed wheel 21 and rotates on its own axis, which drives the driven link 23 to swing.

[0057] When the rotating disk 3 rotates, it will drive the active connecting rod 22 to rotate in a circle, causing the connection point between the active connecting rod 22 and the driven connecting rod 23 to rotate back and forth in a circle. At the same time, the driven connecting rod 23 will rotate at its connection point with the active connecting rod 22, thereby achieving the effect of reciprocating movement at the other end of the driven connecting rod 23.

[0058] Both the fixed pulley 21 and the rotating pulley 23 are synchronous pulleys, and the belt 27 is a synchronous belt.

[0059] The diameter of the fixed wheel 21 is larger than that of the rotating wheel 23, and the ratio of their diameters can be 2:1. This allows the rotating wheel 23 to achieve a large-angle rotation effect when it makes a small revolution around the planet. Consequently, when the rotating disk 3 is rotated with a small amplitude, the driven link 23 can achieve a large swing amplitude.

[0060] The linkage mechanism 2 further includes a guide frame 24 and a movable seat 25. The guide frame 24 is arranged along the length direction of the housing 1. The movable seat 25 is rotatably connected to the other end of the driven link 23 and moves along the guide frame 24 under its drive. The linkage mechanism 2 drives the grinding mechanism 9 to reciprocate through the movable seat 25.

[0061] In this embodiment, the rotating disk 3 and the fixed wheel 21 are located at the middle position in the length direction and the middle position in the height direction of the housing 1, and the guide frame 24 is located at the middle position in the height direction of the housing. This provides space at the top and bottom for the active connecting rod 22 and the driven connecting rod 23 to rotate and swing, so that the end of the driven connecting rod 23 can maintain the effect of moving along the length direction of the guide frame 24, thereby driving the movable seat 25 to reciprocate along the length direction of the guide frame 24.

[0062] The movable seat 25 is connected to one side of the movable frame 91 of the sharpening mechanism 9. When the movable seat 25 reciprocates, it can drive the sharpening mechanism 9 to reciprocate.

[0063] A limiting mechanism 8 is provided on the upper part of the inner side of the first fixing plate 6. The limiting mechanism 8 includes a mounting plate 81. A guide plate 82 is fixedly connected to the bottom of the mounting plate 81. A plurality of mounting grooves 83 are provided on the top of the guide plate 82. A magnet 84 for adsorbing the cutting tool is provided in the mounting groove 83. A cutting tool slot 85 is provided on the bottom of the guide plate 82 along the length direction of the housing 1.

[0064] The tool slot 85 is used to guide and limit the back of the tool. When the tool is inserted, the back of the tool moves along the tool slot 85. During the sharpening process, the magnet 84 attracts the tool body and works with the tool slot 85 to fix the tool and prevent the tool from shaking or moving. When sharpening, you can also hold the tool handle with one hand and turn the rocker handle 4 with the other hand to sharpen the tool.

[0065] It also includes a collection cover 18. A collection cover guide groove 15 for pulling out the collection cover 18 is provided at the bottom of the rear end of the housing 1. An elastic retaining bead is provided at the bottom of the collection cover 18. A retaining bead positioning groove 16 for locking the elastic retaining bead is provided at the bottom of the inner wall of the housing 1. A support piece 17 for supporting the collection cover guide groove 18 is provided in the inner cavity of the housing 1.

[0066] The collection cover 18 is used to collect the debris generated during sharpening. A magnetic sheet can be provided on the upper surface of the collection cover 18 to attract the metal debris that falls off the tool due to friction.

[0067] The elastic retaining ball and the retaining ball positioning groove 16 work together to position the collection cover 18 to prevent it from loosening. When cleaning is required, the collection cover 18 can be removed and cleaned by simply pulling it outward.

[0068] Second Embodiment

[0069] Please refer to Figure 16Unlike the first embodiment, a sharpening mechanism 9 is also provided. The sharpening mechanism 9 includes a movable frame 91, two guide rods 92 are vertically arranged inside the movable frame 91, and a sharpening frame 94 that can slide and rise along the guide rods 92 is arranged inside the movable frame 91. A sharpening groove is formed at the top of the sharpening frame 94. A sharpening wheel 95 is arranged in the middle of the sharpening groove on the sharpening frame 94. A V-shaped groove is arranged in the middle of the sharpening wheel 95, and the rotation axis of the sharpening wheel 95 is assembled at a certain angle with the horizontal direction of the sharpening frame 94. The sharpening wheel 95 is attached to the cutting edge of the knife by the two sides of the V-shaped groove to adapt to the shape of the cutting edge of the knife.

[0070] Compared with related technologies, the knife sharpener provided by this invention, which uses a hand-cranked linkage mechanism to achieve reciprocating sharpening, has the following advantages: Compared with traditional whetstones or knife sharpeners that require repeated pushing and pulling of the knife by hand, this invention converts the rotational motion of the rotating disk 3 into the reciprocating linear motion of the sharpening mechanism 9 through the hand-cranked linkage mechanism 2. Users do not need to repeatedly apply force and rub the knife by hand; they only need to rotate the crank handle 4, which is foldable and stored in the storage slot 35 of the rotating disk 3, to drive the sharpening element to actively contact the blade for sharpening, significantly reducing arm fatigue and soreness. Simultaneously, after the knife is inserted into the housing 1, it is double-fixed by the knife-holding groove 85 of the guide plate 82 and the magnet 84, preventing the knife from shaking or shifting during sharpening, fundamentally reducing the safety hazards of scratches and cuts, and adapting to users with different skill levels. The sharpening frame 94 in the moving frame 91 of the sharpening mechanism 9 is designed to be height-adjustable through the guide rod 92 and spring 93. The elasticity of the spring 93 keeps the sharpening frame 94 always in contact with the blade, and the X-shaped spring is pressed against the elastic element 97 in the receiving slot 98. The staggered grinding rod 96 or the gradually spaced grinding wheel 95 can automatically adapt to knives of different widths, thicknesses, and blade angles without manual adjustment. The grinding mechanism 9 moves smoothly back and forth along the slide rod 10, ensuring uniform contact pressure and consistent friction trajectory between the grinding parts and the blade. This avoids the uneven grinding and inconsistent sharpness caused by uneven force in traditional manual grinding, thus improving grinding quality and efficiency. The linkage mechanism 2, through the cooperation of the fixed wheel 21, the rotating wheel 26, and the belt 27, enables the grinding mechanism 9 to perform a large-stroke reciprocating motion along the structure connecting the guide frame 24 and the movable seat 25 with a small rotation of the rotating disk 3. The transmission ratio is precise and the operation is smooth without jamming or shaking. Compared with the traditional method of manually pushing and pulling the knife, the hand-cranked drive can maintain a uniform grinding speed, reducing the intensity of operation and improving grinding efficiency through continuous and stable friction, restoring the sharpness of the knife in a short time.

[0071] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism, characterized in that: The device includes a housing (1), a sharpening mechanism (9), and a linkage mechanism (2). The housing (1) includes a left housing (11) and a right housing (12) that are spliced ​​together. The inner cavity of the housing (1) is provided with a sharpening mechanism (9) that can move along the length of the housing (1). A rotating disk (3) is rotatably provided on one side wall of the housing (1). A foldable rocker handle (4) is eccentrically provided on the rotating disk (3). The inner cavity of the housing (1) is provided with a linkage mechanism (2) that drives the sharpening mechanism (9) to reciprocate through the rotating disk (3). The tool is inserted from the front end of the housing (1) and the sharpening mechanism (9) reciprocates along the blade to achieve the sharpening function.

2. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 1, characterized in that, The front end and rear end of the inner cavity of the housing (1) are respectively provided with a first fixing plate (6) and a second fixing plate (7). Multiple slide rods (10) are provided between the first fixing plate (6) and the second fixing plate (7). The multiple slide rods (10) form a hollow frame structure. The grinding mechanism (9) moves along the slide rods (10).

3. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 1, characterized in that, The sharpening mechanism (9) includes a movable frame (91), with two guide rods (92) vertically arranged inside the movable frame (91). A sharpening frame (94) that can slide and rise along the guide rods (92) is arranged inside the movable frame (91). A sharpening groove is formed at the top of the sharpening frame (94). Sharpening rods (96) that are intersecting are arranged on both sides of the sharpening groove inside the sharpening frame (94). A spring (93) that presses the sharpening frame (94) upward is arranged on the guide rods (92). The sharpening mechanism (9) is connected to the linkage mechanism (2) through the movable frame (91).

4. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 3, characterized in that, The inner cavity of the grinding frame (94) is provided with inclined receiving grooves (98) on the left and right sides of the grinding groove. The bottom ends of the two receiving grooves (98) are staggered in the front-to-back direction. The two grinding rods (96) are respectively located in one of the receiving grooves (98) to form an X-shaped structure with staggered front-to-back direction. Each receiving groove (98) is provided with an elastic element (97) that pushes the grinding rod (96) towards the grinding groove.

5. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 1, characterized in that, The rotating disk (3) is rotatably mounted on the right housing (12). A storage groove (35) is recessed inward on the outer side of the rotating disk (3). An installation position is provided at one end of the storage groove (35). A connecting seat (31) is rotatably mounted in the installation position. One end of the rocker (4) is mounted to the connecting seat (31) by a rotating pin (32). When the rocker (4) rotates inward, it can be stored in the storage groove (35).

6. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 1, characterized in that, The linkage mechanism (2) includes a fixed wheel (21), an active linkage (22), a driven linkage (23), and a rotating wheel (26). The fixed wheel (21) is coaxial with the rotating disk (3) and fixedly installed on the inner wall of the housing (1). One end of the active linkage (22) is fixedly installed in the fixed groove (33) at the center of the shaft on the inner side of the rotating disk (3) through a connecting block (28) and rotates coaxially with the rotating disk (3). The other end of the active linkage (22) is coaxially hinged to the rotating shaft of one end of the driven linkage (23) through a rotating hole. A rotating wheel (26) coaxial with the rotating shaft is provided at the connection between the active linkage (22) and the driven linkage (23). The driven linkage (23) is fixedly connected to the rotating wheel (26) through the rotating shaft. The rotating wheel (26) is driven by the fixed wheel (21) through a belt (27). The linkage mechanism (2) further includes a guide frame (24) and a movable seat (25). The guide frame (24) is arranged along the length direction of the housing (1). The movable seat (25) is rotatably connected to the other end of the driven link (23) and moves along the guide frame (24) under its drive. The linkage mechanism (2) drives the grinding mechanism (9) to reciprocate through the movable seat (25).

7. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 2, characterized in that, A limiting mechanism (8) is provided on the upper part of the inner side of the first fixing plate (6). The limiting mechanism (8) includes a mounting plate (81). A guide plate (82) is fixedly connected to the bottom of the mounting plate (81). A plurality of mounting grooves (83) are provided on the top of the guide plate (82). A magnet (84) for adsorbing the cutting tool is provided in the mounting groove (83). A tool-holding groove (85) is provided on the bottom of the guide plate (82) along the length direction of the housing (1).

8. The sharpening device that achieves reciprocating sharpening function through a hand-cranked linkage mechanism according to claim 1, characterized in that, It also includes a collection cover (18), and a collection cover guide groove (15) for pulling out the collection cover (18) is provided at the bottom of the rear end of the housing (1). An elastic retaining bead is provided at the bottom of the collection cover (18), and a retaining bead positioning groove (16) for locking the elastic retaining bead is provided at the bottom of the inner wall of the housing (1). A support piece (17) for supporting the collection cover guide groove (18) is provided in the inner cavity of the housing (1).

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