Knife sharpener

Abstract

Disclosed is a knife sharpener, comprising: a rotating member, and a guiding assembly capable of guiding the rotating member to rotate along an axis A, a sharpening part arranged on the rotating member, and a moving mechanism capable of driving the rotating member to reciprocate along an extension direction of a blade part; the rotation of the rotating member drives the sharpening part to approach the blade part to a position in contact with the blade part, or drives the sharpening part away from the blade part to a position out of contact with the blade part; when the sharpening part is in contact with the blade part, the rotating member moves along the extension direction of the blade part so as to sharpen the blade part.

Description

Technical Field

[0001] The present invention relates to the technical field of knife sharpening devices, and in particular, to a knife sharpener.Background Art

[0002] Existing knife sharpeners are generally classified into electric and non-electric types, both used for sharpening knives such as kitchen knives, either to restore sharpness or to put a new edge.

[0003] Non-electric sharpeners typically feature a handle with several sharpening structures at the front end, such as sharpening blade inserts or sharpening rods. For a non-electric knife sharpener of this type, referring to a knife sharpener disclosed in patent document CN216967465U as a reference.

[0004] Electric sharpeners usually include a motor that drives a grinding wheel. The grinding wheel grinds the blade edge when it comes into contact with the blade edge.

[0005] However, these conventional knife sharpeners often suffer from drawbacks such as being difficult to operate, having poor adaptability to different blade types, and delivering unsatisfactory sharpening performance, which fail to meet practical user needs.Summary of the Invention

[0006] In view of the shortcomings and defects of the existing technology, a knife sharpener with good adaptability and good knife sharpening effect is provided.

[0007] A knife sharpener includes: a rotating member, and a guiding assembly, wherein the guiding assembly is capable of guiding the rotating member to rotate along an axis A, a sharpening part arranged on the rotating member, and a moving mechanism capable of driving the rotating member to move in a front and rear direction along a path of a blade part.

[0008] Rotation of the rotating member drives the sharpening part to move close to the blade part to a position in contact with the blade part, or drives the sharpening part away from the blade part to a position out of contact with the blade part.

[0009] When the sharpening part is in contact with the blade part, the rotating member moves along an extending direction of the blade part in order to sharpen the blade part.

[0010] By adopting the above structure, the advantageous effects of the knife sharpener of the present invention compared with the existing technology are as follows: The knife is pre-positioned when the user needs to sharpen the knife, with the blade of the knife facing downward and the tip thereof facing forward.

[0011] Preferably, a center line of the knife is located above and overlaps the axis A.

[0012] Further, the rotating member rotates along the axis A, so that the sharpening part on the rotating member is brought into contact with a side surface of the blade part, meanwhile the moving mechanism drives the rotating member to move along the extension (front and rear) direction of the blade part, so that the sharpening part can sharpen the blade part.

[0013] The rotating member is rotatable along the axis A, ensuring a better fitting between the sharpening part and the side surface of the blade part and improving the sharpening effect and making it adaptable to different types of knives (such as knives with different blade thicknesses or heights).

[0014] The moving mechanism is capable of moving the rotating member along the extension (front and rear) direction of the blade part, achieving uniform and automatic sharpening of the side surface of the blade part.

[0015] After the sharpening of the blade part is completed, the rotating member is rotated until the sharpening part is out of contact with the blade part, allowing the user to withdraw the knife more easily.

[0016] As an improvement to the present invention, a transmission member is provided on the rotating member.

[0017] The guiding assembly includes a groove guiding mechanism or a track guiding mechanism that is in transmission engagement with the transmission member.

[0018] When the moving mechanism drives the rotating member to move forward along the path of the blade part, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate through the transmission member until the sharpening part is in contact with the blade part.

[0019] When the moving mechanism drives the rotating member to move backward along the path of the blade part, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate through the transmission member until the sharpening part is out of contact with the blade part.

[0020] As an improvement of the present invention, the groove guiding mechanism includes a first guiding groove.

[0021] The first guiding groove includes a first forward section extending in the front and rear direction, and a first return section extending in the front and rear direction, and a rear end of the first return section is in communication with a rear end of the first forward section.

[0022] An acute angle a is formed between a center line d of the first forward section and a center line B of the rotating member, and an acute angle b is formed between a center line e of the first return section and the center line B of the rotating member, and the angle a is smaller than the angle b.

[0023] When the transmission member is in the first return section, the sharpening part is located on a right side of the blade part, and a gap is formed between the sharpening part and a right side surface of the blade part.

[0024] When the transmission member moves from the first return section to the first forward section, the rotating member rotates to an extent that the angle between the sharpening part and the blade part is reduced, such that the sharpening part comes into contact with the right side surface of the blade part.

[0025] As an improvement of the present invention, the groove guiding mechanism further includes a second guiding groove.

[0026] The second guiding groove includes a second forward section extending in the front and rear direction, and a second return section extending in the front and rear direction, and a rear end of the second return section is in communication with a rear end of the second forward section.

[0027] An acute angle aa is formed between a center line dd of the second forward section and the center line B of the rotating member, and an acute angle bb is formed between a center line ee of the second return section and the center line B of the rotating member, and the angle aa is smaller than the angle bb.

[0028] When the transmission member is in the second return section, at which moment the sharpening part is located on a left side of the blade part, and a gap is formed between the sharpening part and a left side surface of the blade part.

[0029] When the transmission member moves from the second return section to the second forward section, the rotating member rotates to the extent that the angle between the sharpening part and the blade part is reduced, such that the sharpening part comes into contact with the left side surface of the blade part.

[0030] As an improvement of the present invention, when a groove guiding mechanism is adopted, the transmission member is an elastic pin capable of elastically and axially expanding and retracting.

[0031] As an improvement of the present invention, the transmission member and the sharpening part are arranged opposite to each other along a same radial direction of the rotating member.

[0032] As an improvement of the present invention, the first forward section and the second forward section are arranged symmetrically about the center line B of the rotating member, and the first return section and the second return section are arranged symmetrically about the center line B of the rotating member.

[0033] As an improvement of the present invention, a front end of the first forward section is connected to a front end of the second return section through a first switching guiding groove, and a front end of the second forward section is connected to a front end of the first return section through a second switching guiding groove.

[0034] When the transmission member moves from the first forward section to the front end of the second return section, the rotating member drives the sharpening part to switch from a state of being at a position on the right side of the blade part to a state of being at a position on the left side of the blade part.

[0035] As an improvement of the present invention, the front end of the first return section and the front end of the second return section are respectively located at the front end of the first forward section and the front end of the second forward section.

[0036] The first switching guiding groove and the second switching guiding groove are arranged in a crisscrossed manner.

[0037] A guiding mechanism is provided at intersections of the first switching guiding groove and the second switching guiding groove, and the guiding mechanism includes a first blocking member and a second blocking member.

[0038] The first blocking member is rotatably disposed above a first intersection of the first switching guiding groove, and the transmission member entering the first switching guiding groove is able to form a blocking cooperation with the first blocking member to drive the first blocking member to rotate forward to a position above a second intersection of the second switching guiding groove.

[0039] The second blocking member is rotatably disposed above a third intersection of the second switching guiding groove, and the transmission member entering the second switching guiding groove is able to form a blocking cooperation with the second blocking member to drive the second blocking member to rotate forward to a position above a fourth intersection of the first switching guiding groove.

[0040] As an improvement of the present invention, when the sharpening part contacts the left side surface of the blade part, the track guiding mechanism is capable of guiding the rotating member as the rotating member moves forward, to keep the sharpening part in contact with the left side surface of the blade part, and guiding the rotating member to rotate until the sharpening part faces the right side surface of the blade part when the rotating member moves forward to a limit position.

[0041] When the rotating member moves backward, the track guiding mechanism guides the rotating member to keep the sharpening part out of contact with the right side surface of the blade part.

[0042] When the rotating member moves backward to a limit position, the track guiding mechanism is capable of guiding the rotating member to rotate until the sharpening part comes into contact with the right side surface of the blade part.

[0043] When the rotating member continues to move forward, the rotating member is guided to rotate until the sharpening part comes into contact with the right side surface of the blade part, and when the rotating member moves forward to the limit position, the rotating member is guided to rotate until the sharpening part faces the left side surface of the blade part.

[0044] When the rotating member moves backward, the rotating member is guided to keep the sharpening part out of contact with the left side surface of the blade, and when the rotating member moves backward to the limit position, the track guiding mechanism is capable of guiding the rotating member to rotate until the sharpening part comes into contact with the left side surface of the blade part.Brief Description of the Drawings

[0045] FIG. 1 is a schematic structural diagram of the present invention. FIG. 2 is a schematic structural diagram of a rotating member and a moving mechanism of the present invention. FIG. 3 is a front view of the present invention. FIG. 4 is a sectional view of the present invention taken along line FF in FIG. 3. FIG. 5 is an enlarged schematic diagram of the structure in area G in FIG. 4 of the present invention. FIG. 6 is a schematic structural diagram of the rotating member and a sharpening part of the present invention. FIG. 7 is a sectional view of the structure in FIG. 6 of the present invention. FIG. 8 is a schematic structural diagram of the knife fixing mechanism of the present invention when fixing a knife. FIG. 9 is a schematic structural diagram of the knife fixing mechanism of the present invention. FIG. 10 is a clamping claw of the knife fixing mechanism of the present invention. FIG. 11 is a schematic structural diagram of guiding grooves of the present invention. FIG. 12 is an enlarged schematic diagram of the structure in area H in FIG. 11 of the present invention.

[0046] Reference signs are as follows: 1, rotating member; 2, sharpening part; 3, moving mechanism; 4, transmission member; 5, first guiding groove; 5.1, first forward section; 5.2, first return section; 6, second guiding groove; 6.1, second forward section; 6.2, second return section; 7, first switching guiding groove; 7.1, first intersection; 7.2, fourth intersection; 8, second switching guiding groove; 8.1, second intersection; 8.2, third intersection; 9, first blocking member; 10, second blocking member; 11, slider; 11.1, guiding post; 11.2, control rod; 12, clamping claw; 12.1, clamping part; 12.2, engaging slot; 13, elastic member; 14, screw rod; 15, screw rod nut; 16, first motor; 17, mounting bracket; 18, second motor; 19, sanding belt rack; 19.1, rotating wheel; 20, unidirectional blocking member; 21, blade part; and 22, holding sleeve.Detailed Description of Embodiments

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] The present invention is explained with reference to FIGS. 1-12.

[0049] A knife sharpener includes: a rotating member 1 and a guiding assembly that is capable of guiding the rotating member 1 to rotate along an axis A; a sharpening part 2 arranged on the rotating member 1; and a moving mechanism 3 capable of driving the rotating member 1 to move forward and backward along a path of a blade part 21.

[0050] The rotation of the rotating member 1 drives the sharpening part 2 to move close to the blade part 21 so as to bring the sharpening part 2 into contact with the blade part 21, or drives the sharpening part 2 to move away from the blade part 21 so as to bring the sharpening part 2 out of contact with the blade part 21.

[0051] When the sharpening part 2 is in contact with the blade part 21, the rotating member 1 moves along an extending direction of the blade part 21 to sharpen the blade part 21.

[0052] The knife is first pre-positioned when the user needs to perform a knife sharpening operation, and the blade part 21 of the knife is arranged to face downward with the tip of the knife facing forward.

[0053] Preferably, a center line of the knife is located above and overlaps the axis A.

[0054] Further, the rotating member 1 rotates along the axis A and drives the sharpening part 2 on the rotating member 1 to come into contact with a side surface of the blade part 21, and the moving mechanism 3 drives the rotating member 1 to move along an extension (front and rear) direction of the blade part 21, so that the sharpening part 2 is able to sharpen the blade part 21.

[0055] The rotating member 1 is rotatable along the axis A, ensuring a better fitting between the sharpening part 2 and the side of the blade part 21, thereby improving the sharpening effect and making it adaptable to different types of blades (e.g., blades with varying thicknesses or heights at the blade part 21).

[0056] The moving mechanism 3 is capable of moving the rotating member 1 along the extension (front and rear) direction of the blade part 21 to achieve uniform and automatic sharpening of the side surface of the blade part 21.

[0057] After the sharpening of the blade part 21 is completed, the rotating member 1 rotates until the sharpening part 2 is out of contact with the blade part 21, so as to facilitate the user to withdraw the knife.

[0058] The rotating member 1 is provided with a transmission member 4.

[0059] The guiding assembly includes a groove guiding mechanism or a track guiding mechanism that is in a transmission connection with the transmission member.

[0060] When the moving mechanism 3 drives the rotating member 1 to move forward along the path of the blade part 21, the groove guiding mechanism or the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 contacts the blade part 21 through the transmission member 4.

[0061] When the moving mechanism drives the rotating member 1 to move backward along the path of the blade part 21, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate until the sharpening part 2 is out of contact with the blade part 21 through the transmission member 4.

[0062] Referring to FIGS. 4-5, an embodiment of the groove guiding mechanism of the present invention is illustrated.

[0063] A first guiding groove 5 is provided.

[0064] The first guiding groove 5 includes a first forward section 5.1 extending in a front and rear direction, and a first return section 5.2 extending in the front and rear direction, and a rear end of the first return section 5.2 is connected to a rear end of the first forward section 5.1.

[0065] An acute angle a is formed between the center line d of the first forward section 5.1 and the center line B of the rotating member 1, and an acute angle b is formed between a center line e of the first return section 5.2 and the center line B of the rotating member 1, and the angle a is smaller than the angle b.

[0066] When the transmission member 4 is in the first return section 5.2, the sharpening part 2 is located on a right side of the blade part 21, and a gap is formed between the sharpening part 2 and a right side surface of the blade part 21.

[0067] As the transmission member 4 moves from the first return section 5.2 to the first forward section 5.1, the rotating member 1 is rotated to an extent that the angle between the sharpening part 2 and the blade part 21 is reduced, such that the sharpening part 2 is in contact with the side surface of the blade part 21.

[0068] As an improvement of the present invention, the groove guiding mechanism further includes a second guiding groove 6.

[0069] The second guiding groove 6 includes a second forward section 6.1 in the front and rear direction, and a second return section 6.2 extending in the front and rear direction, and a rear end of the second return section 6.2 is connected to a rear end of the second forward section 6.1.

[0070] An acute angle aa is formed between a center line dd of the second forward section 6.1 and the center line B of the rotating member 1, and an acute angle bb is formed between a center line ee of the second return section 6.2 and the center line B of the rotating member 1, and the angle aa is smaller than the angle bb.

[0071] When the transmission member 4 is in the second return section 6.2, the sharpening part 2 is located on a left side of the blade part 21, and a gap is formed between the sharpening part 2 and a right side surface of the blade part 21.

[0072] As the transmission member 4 moves from the second return section 6.2 to the second forward section 6.1, the rotating member 1 is rotated to an extent that the angle between the sharpening part 2 and the blade part 21 is reduced, such that the sharpening part 2 is in contact with the side surface of the blade part 21.

[0073] With the above improvements, the first forward section 5.1, the first return section 5.2, the second forward section 6.1, and the second return section 6.2 are all configured as inclined structures, forming an acute angle with the center line B of the rotating member 1, respectively.

[0074] The angle a is formed between the center line of the first forward section 5.1 and the center line B of the rotating member 1, and the angle b is formed between the center line of the first return section 5.2 and the center line B of the rotating member 1.

[0075] The angle aa is formed between the center line of the second forward section 6.1 and the center line B of the rotating member 1, and the angle bb is formed between the second return section 6.2 and the center line B of the rotating member 1.

[0076] The angle a is consistent with the angle aa, and the angle b is consistent with the angle bb.

[0077] When the transmission member 4 enters the first return section 5.2 or the second return section 6.2, the change in the angle causes the rotating member 1 to rotate away from the blade part 21, thereby driving the sharpening part 2. The angle between the sharpening part 2 and the blade part 21 increases, and a gap is formed between the sharpening part 2 and the side surface of the blade part 21. The sharpening part 2 is out of contact with the blade part 21, thus the sharpening part 2 is not able to sharpen the blade part 21.

[0078] When the transmission member 4 enters the first forward section 5.1 or the second forward section 6.1 from the return section, the change in the angle causes the rotating member 1 to rotate close to the blade part 21, thereby driving the sharpening part 2. The angle between the sharpening part 2 and the blade part 21 is reduced, and the gap between the sharpening part 2 and the blade part 21 is reduced such that the sharpening part 2 is in contact with the side surface of the blade part 21, thus the sharpening part 2 is able to sharpen the blade part 21.

[0079] With the above improvements, the change of the guiding groove angle is utilized to drive the rotation of the rotating member 1 through the transmission member 4, which in turn drives the sharpening part 2, resulting in a stable and reliable operation.

[0080] In this embodiment, two rotating members 1 with overlapping rotating shafts can be used. The two rotating members 1 are driven to move by the moving mechanism 3 respectively. The two rotating members 1 are respectively provided with a sharpening part 2. The transmission members 4 of the two rotating members 1 independently cooperate with the first guiding groove 5 or the second guiding groove 6. The sharpening part 2 corresponding to the rotating member 1 that cooperates with the first guiding groove 5 sharpens the right side surface of the blade part 21, and the sharpening part 2 corresponding to the rotating member 1 that cooperates with the second guiding groove 6 sharpens the left side surface of the blade part 21.

[0081] When the groove guiding mechanism is adopted, the transmission member 4 is an elastic pin and can be elastically extended and retracted axially.

[0082] As shown in FIG. 5, the transmission member 4 is an elastic pin that is capable of axially expanding and retracting. Preferably, a depth of the groove of the first forward section 5.1 is greater than a depth of the groove of the first return section 5.2, and a depth of the groove of the second forward section 6.1 is greater than a depth of the groove of the second return section 6.2.

[0083] The elastic transmission member 4 that is axially expandable and retractable extends and fits with the first forward section 5.1 after entering the first return section 5.2 from the first return section 5.2, so as to avoid an accidental return to the first return section 5.2.

[0084] The transmission member 4 extends and fits with the second forward section 6.1 after entering the second forward section 6.1 from the second return section 6.2 to avoid an accidental return to the second return section 6.2.

[0085] Referring to FIGS. 4 and 7, the transmission member 4 and the sharpening part 2 are arranged opposite to each other along a radial direction of the rotating member 1.

[0086] The transmission member 4 and the sharpening part 2 are arranged opposite to each other along the radial direction, so that the cooperation between the transmission member 4 and the groove guiding mechanism or the track guiding mechanism can be more effectively fed back to the sharpening part 2.

[0087] Referring to FIGS. 2 and 4, the first forward section 5.1 and the second forward section 6.1 are symmetrically arranged about the center line B of the rotating member 1, and the first return section 5.2 and the second return section 6.2 are symmetrically arranged about the center line B of the rotating member 1.

[0088] With the above improvements, the structural layout becomes more reasonable, and the distance to the blade part 21 remains consistent, enabling more effective and uniform sharpening of the blade.

[0089] Referring to FIGS. 4, 11, and 12, the front end of the first forward section 5.1 is in communication with the front end of the second return section 6.2 via the first switching guiding groove 7, and the front end of the second forward section 6.1 is in communication with the front end of the first return section 5.2 via the second switching guiding groove 8.

[0090] As the transmission member 4 moves from the first forward section 5.1 to the front end of the second return section 6.2, the rotating member 1 drives the sharpening part 2 to switch from a state of being at a position located on the right side of the blade part 21 to a state of being at a position located on the left side of the blade part 21.

[0091] In this embodiment, only one rotating member 1 is used, and the rear end of the first forward section 5.1 serves as the starting point of the movement of the transmission member 4. At this moment, the sharpening part 2 is in contact with a rear end of the right side surface of the blade part 21.

[0092] Further, the moving mechanism 3 drives the rotating member 1 to move forward along the first forward section 5.1, and the transmission member 4 continues to move forward in the first forward section 5.1, no angle being changed in the first forward section 5.1, thus the rotating member 1 is unable to rotate, and the sharpening part 2 continues to move forward along the path of the blade part 21, uniformly and efficiently sharpening the right side surface of the blade part 21.

[0093] Furthermore, the moving mechanism 3 continues to drive the rotating member 1 to move forward, and the transmission member 4 enters through the first switching guiding groove 7 into a position opposite to the rear end of the first return section 5.2.

[0094] Then, the moving mechanism 3 drives the rotating member 1 to move backward, and the transmission member 4 enters the front end of the second return section 6.2. Due to the angle of the second return section 6.2, the rotating member 1 rotates until the sharpening part 2 is located on the left side of the blade part 21, and a gap is formed between the sharpening part 2 and the blade part.

[0095] The transmission member 4 moves backward along the second return section 6.2 to the rear end of the second forward section 6.1. Due to the angle of the second forward section 6.1, the rotating member 1 rotates until the sharpening part 2 comes into contact with the left side surface of the blade part 21.

[0096] Further, the moving mechanism 3 drives the rotating member 1 to move forward, and the transmission member 4 continues to move forward in the second forward section, so that the sharpening part 2 is able to uniformly and efficiently sharpen the left side surface of the blade part 21.

[0097] Furthermore, the transmission member 4 enters the second switching guiding groove 8 and enters the front end of the first return section 5.2. The moving mechanism 3 drives the rotating member 1 to move backward, and the transmission member 4 moves to the rear end along the first return section 5.2.

[0098] With the above improvements, the two side surfaces of the blade part 21 can be sharpened by utilizing one rotating member 1 and its sharpening part 2, which results in a high consistency of grinding effect, a simple structure and relatively low costs.

[0099] When one rotating member 1 is utilized, preferably, a unidirectional blocking member 20 for blocking and limiting is respectively provided at the rear end of the first return section 5.2 and the rear end of the second return section 6.2. When the transmission member 4 moves to the rear end, the unidirectional blocking member 20 is driven to rotate outward, so that the rear ends of the first forward section 5.1 and the second forward section 6.1 are exposed, and the transmission member 4 can enter the rear end of the first forward section 5.1 or the second forward section 6.1. After the transmission member 4 enters, the unidirectional blocking member 20 is capable of elastically returning to its original position, rotating back to the rear end of the first return section 5.2 or the rear end of the second return section 6.2.

[0100] With the above improvements, the rotating member 1 is prevented from accidentally entering the first return section 5.2 or the second return section 6.2 when moving forward, so that the operation reliability of the device is enhanced.

[0101] The front end of the first return section 5.2 and the front end of the second return section are located at the front end of the first forward section 5.1 and the front end of the second forward section 6.1, respectively.

[0102] The first switching guiding groove 7 and the second switching guiding groove 8 are arranged in a crisscrossed manner.

[0103] A guiding mechanism is provided at the intersection, and the guiding mechanism includes a first blocking member 9 and a second blocking member 10.

[0104] The first blocking member 9 is rotatably disposed above the first intersection 7.1 of the first switching guiding groove 7, and the transmission member 4 entering the first switching guiding groove 7 forms a blocking cooperation with the first blocking member 9 to drive the first blocking member 9 to rotate forward to a position above the second intersection 8.1 of the second switching guiding groove 8.

[0105] The second blocking member 10 is rotatably placed on the third intersection 8.2 of the second switching guiding groove 8, and the transmission member 4 entering the second switching guiding groove 8 can form a blocking fit with the second blocking member 10 to drive the second blocking member 10 to rotate forward to a position above the fourth intersection 7.2 of the first switching guiding groove 7.

[0106] With the above improvements, the crisscrossed configuration of the first switching guiding groove 7 and the second switching guiding groove 8 enables a more compact structure, which is conducive to the miniaturization of the device.

[0107] When the transmission member 4 moves forward into the first switching guiding groove 7 and drives the first blocking member 9 to rotate forward to the position above the second intersection 8.1 of the second switching guiding groove 8, the second blocking member 10 is still located above the third intersection 8.2 of the second switching guiding groove 8. The first blocking member 9 prevents the transmission member 4 from entering the second intersection 8.1, and the second blocking member 10 prevents the transmission member 4 from entering the third intersection 8.2, so that the transmission member 4 can stably pass through the first intersection 7.1 and the fourth intersection 7.2 and enter the rear end of the second return section 6.2.

[0108] When the transmission member 4 moves forward into the second switching guiding groove 8 and drives the second blocking member 10 to rotate forward to the position above the fourth intersection 7.2 of the first switching guiding groove 7, the first blocking member 9 is still located above the first intersection 7.1 of the first switching guiding groove 7. The first blocking member 9 prevents the transmission member 4 from entering the first intersection 7.1, and the second blocking member 10 prevents the transmission member 4 from entering the fourth intersection 7.2, wo that the transmission member 4 can stably pass through the second intersection 8.1 and the third intersection 8.2 and enter the rear end of the first return section 5.2.

[0109] In addition, the first blocking member 9 and the second blocking member 10 are respectively connected with a torsion spring. After the first blocking member 9 and the second blocking member 10 are out of contact with the transmission member 4, the torsion springs drive the first blocking member 9 and the second blocking member 10 to return to the initial position.

[0110] With the above improvements, the structure can operate stably and reliably, improving the user experience.

[0111] Referring to FIGS. 1, 2, 8, 9 and 10, a knife fixing mechanism is further provided, which includes two clamping claws 12 arranged opposite to each other and a slider 11. The outer ends of the two clamping claws 12 are rotatable to adjust a clamping space between the two clamping claws 12 on the inner side when rotating.

[0112] The slider 11 is arranged below and is in a transmission connection with the clamping claws 12, the slider 11 moves forward to drive the clamping claws 12 to rotate forward so as to increase the clamping space, and the slider 11 moves backward to drive the clamping claws 12 to rotate backward so as to reduce the clamping space.

[0113] Guiding posts 11.1 are protruded from an upper end surface of the slider 11, and engaging slots 12.2 are respectively provided below the clamping claws 12. The engaging slots 12.2 are extended inwardly with the guiding posts 11.1 inserted therein. When the slider 11 moves forward and backward, the clamping claws 12 are able to be rotated forward and backward through the cooperation between the guiding posts 11.1 and the engaging slots 12.2.

[0114] The slider 11 is connected to an elastic member 13, which may be a spring. One end of the spring is limited, and the other end thereof is abutted against the front end of the slider 11, forcing the slider 11 to always have a tendency to move backward.

[0115] The clamping claws 12 are provided with clamping parts 12.1 close to each other on the inner sides, and a clamping space is formed between the inner sides of the clamping parts 12.1. When the clamping claws 12 rotate, the clamping parts 12.1 on the inner sides can rotate inward or outward.

[0116] The slider 11 is connected with a control rod 11.2. When the knife needs to be positioned, the control rod 11.2 is first pressed forward, the control rod 11.2 drives the slider 11 to move forward, and the slider 11 drives the two clamping claws 12 to rotate outward, such that the clamping space is increased, and the knife can be placed in the clamping space.

[0117] Furthermore, when the control lever 11.2 is released, and under the action of the elastic member 13, the slider 11 moves backward and drives the two clamping claws 12 to rotate inward, such that the clamping space is reduced, and the inner sides of the clamping claws 12 can firmly clamp the knife.

[0118] Furthermore, the blade can be sharpened. After the sharpening is completed, the control lever 11.2 is pressed forward to release the knife from the clamping claws 12, and the sharpened knife can be withdrawn.

[0119] With the above improvements, the position of the knife is stable, preventing movement during the sharpening process, and thereby achieving a better sharpening effect.

[0120] In addition, the operation of the knife fixing mechanism is simple and easy to operate.

[0121] The fixing mechanism further includes a holding sleeve 22 arranged in front of the clamping claws 12. The holding sleeve 22 is capable of elastically increasing or decreasing an inner hole diameter to be adapted for clamping a variety of knives, and with the clamping space clamping the knife, the position of the knife can be more stable.

[0122] Referring to FIGS. 1 and 2, the moving mechanism 3 includes a screw rod 14 and a screw nut 15. One end of the screw rod 14 is in a transmission connection with an output end of the motor, the screw nut 15 is sleeved on the screw rod 14, a mounting bracket 17 is provided on the screw nut 15, and the rotating member 1 is connected to the mounting bracket 17.

[0123] Preferably, a bearing is provided on the mounting bracket 17, and the rotating member 1 cooperates and is connected with the bearing, so that the rotation can be smoother, and jamming can be prevented during the operation.

[0124] The motor is used to drive the screw rod 14 to rotate, which in turn drive the screw nut 15 to move the mounting bracket 17 forward and backward, thereby driving the rotating member 1 to move and enabling the transmission member 4 to stably move in the corresponding guiding grooves.

[0125] As an improvement of the present invention, the sharpening part may also be a component that is capable of sharpening the blade, such as a ceramic body, a fine steel rod, and the like.

[0126] In the present invention, the sharpening part 2 utilizes a sanding belt. A motor is provided on the mounting bracket 17, and an output end of the motor extends into the inner side of the rotating member 1.

[0127] The rotating member 1 is provided with a sanding belt rack 19, the sanding belt rack 19 is provided with two rotating wheels 19.1, and the sanding belt is sleeved on the two rotating wheels 19.1.

[0128] One of the rotating wheels 19.1 is linked to the output end of the motor.

[0129] When the rotating member 1 rotates, the sanding belt rack 19 is driven to rotate synchronously.

[0130] With the above improvements, the motor is utilized to drive the sanding belt to rotate, and an outer peripheral surface of the sanding belt can grind the blade part 21 after being brought into contact with the blade part 21, which has high sharpening efficiency and better sharpening effect.

[0131] Referring to FIG. 5, the transmission member 4 is an elastic pin and is capable of axially expanding and retracting.

[0132] Referring to the embodiment of the present invention using the track guiding mechanism, when the sharpening part 2 is in contact with the left side surface of the blade part 21, as the rotating member 1 moves forward, the track guiding mechanism guides the rotating member 1 to maintain the state in which the sharpening part 2 is in contact with the left side surface of the blade part 21, and as the rotating member 1 moves forward to a limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 faces the right side surface of the blade part 21.

[0133] When the rotating member 1 moves backward, the track guiding mechanism guides the rotating member 1 such that the sharpening part 2 is kept out of contact with the right side surface of the blade part 21.

[0134] When the rotating member 1 moves backward to a limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 comes into contact with the right side surface of the blade part 21.

[0135] When the rotating member 1 continues to move forward, the rotating member 1 is guided to rotate until the sharpening part 2 comes into contact with the right side surface of the blade part 21, and when the rotating member 1 moves forward to the limit position, the rotating member 1 is guided to rotate until the sharpening part 2 faces the left side surface of the blade part 21.

[0136] When the rotating member 1 moves backward, the rotating member 1 is guided to keep the sharpening part 2 out of contact with the left side surface of the blade part 21, and when the rotating member 1 moves backward to the limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 is in contact with the left side surface of the blade part 21.

[0137] The above are merely preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the scope of protection of the present invention. It should be noted that for a person of ordinary skill in the art, several improvements and modifications made without departing from the principle of the present invention should also be construed as the scope of protection of the present invention.

Examples

Embodiment Construction

[0047]The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048]The present invention is explained with reference to FIGS. 1-12.

[0049]A knife sharpener includes:

a rotating member 1 and a guiding assembly that is capable of guiding the rotating member 1 to rotate along an axis A; a sharpening part 2 arranged on the rotating member 1; and a moving mechanism 3 capable of driving the rotating member 1 to move forward and backward along a path of a blade part 21.

[0050]The rotation of the rotating member 1 drives the sharpening part 2 to move close to the blade part 21 so as to bring the sharpening part 2 into contact with the blade part 21, or drives the sharpening part 2 to move away from the blade part 21 so as to bring the sharpening part 2 out of contact with the blade part 21.

[0051]When the sharpening part 2 is in contact with the blade part 21, the rotating member 1 moves along an extending direction of the...

Technical Field

[0001] The present invention relates to the technical field of knife sharpening devices, and in particular, to a knife sharpener.Background Art

[0002] Existing knife sharpeners are generally classified into electric and non-electric types, both used for sharpening knives such as kitchen knives, either to restore sharpness or to put a new edge.

[0003] Non-electric sharpeners typically feature a handle with several sharpening structures at the front end, such as sharpening blade inserts or sharpening rods. For a non-electric knife sharpener of this type, referring to a knife sharpener disclosed in patent document CN216967465U as a reference.

[0004] Electric sharpeners usually include a motor that drives a grinding wheel. The grinding wheel grinds the blade edge when it comes into contact with the blade edge.

[0005] However, these conventional knife sharpeners often suffer from drawbacks such as being difficult to operate, having poor adaptability to different blade types, and delivering unsatisfactory sharpening performance, which fail to meet practical user needs.Summary of the Invention

[0006] In view of the shortcomings and defects of the existing technology, a knife sharpener with good adaptability and good knife sharpening effect is provided.

[0007] A knife sharpener includes: a rotating member, and a guiding assembly, wherein the guiding assembly is capable of guiding the rotating member to rotate along an axis A, a sharpening part arranged on the rotating member, and a moving mechanism capable of driving the rotating member to move in a front and rear direction along a path of a blade part.

[0008] Rotation of the rotating member drives the sharpening part to move close to the blade part to a position in contact with the blade part, or drives the sharpening part away from the blade part to a position out of contact with the blade part.

[0009] When the sharpening part is in contact with the blade part, the rotating member moves along an extending direction of the blade part in order to sharpen the blade part.

[0010] By adopting the above structure, the advantageous effects of the knife sharpener of the present invention compared with the existing technology are as follows: The knife is pre-positioned when the user needs to sharpen the knife, with the blade of the knife facing downward and the tip thereof facing forward.

[0011] Preferably, a center line of the knife is located above and overlaps the axis A.

[0012] Further, the rotating member rotates along the axis A, so that the sharpening part on the rotating member is brought into contact with a side surface of the blade part, meanwhile the moving mechanism drives the rotating member to move along the extension (front and rear) direction of the blade part, so that the sharpening part can sharpen the blade part.

[0013] The rotating member is rotatable along the axis A, ensuring a better fitting between the sharpening part and the side surface of the blade part and improving the sharpening effect and making it adaptable to different types of knives (such as knives with different blade thicknesses or heights).

[0014] The moving mechanism is capable of moving the rotating member along the extension (front and rear) direction of the blade part, achieving uniform and automatic sharpening of the side surface of the blade part.

[0015] After the sharpening of the blade part is completed, the rotating member is rotated until the sharpening part is out of contact with the blade part, allowing the user to withdraw the knife more easily.

[0016] As an improvement to the present invention, a transmission member is provided on the rotating member.

[0017] The guiding assembly includes a groove guiding mechanism or a track guiding mechanism that is in transmission engagement with the transmission member.

[0018] When the moving mechanism drives the rotating member to move forward along the path of the blade part, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate through the transmission member until the sharpening part is in contact with the blade part.

[0019] When the moving mechanism drives the rotating member to move backward along the path of the blade part, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate through the transmission member until the sharpening part is out of contact with the blade part.

[0020] As an improvement of the present invention, the groove guiding mechanism includes a first guiding groove.

[0021] The first guiding groove includes a first forward section extending in the front and rear direction, and a first return section extending in the front and rear direction, and a rear end of the first return section is in communication with a rear end of the first forward section.

[0022] An acute angle a is formed between a center line d of the first forward section and a center line B of the rotating member, and an acute angle b is formed between a center line e of the first return section and the center line B of the rotating member, and the angle a is smaller than the angle b.

[0023] When the transmission member is in the first return section, the sharpening part is located on a right side of the blade part, and a gap is formed between the sharpening part and a right side surface of the blade part.

[0024] When the transmission member moves from the first return section to the first forward section, the rotating member rotates to an extent that the angle between the sharpening part and the blade part is reduced, such that the sharpening part comes into contact with the right side surface of the blade part.

[0025] As an improvement of the present invention, the groove guiding mechanism further includes a second guiding groove.

[0026] The second guiding groove includes a second forward section extending in the front and rear direction, and a second return section extending in the front and rear direction, and a rear end of the second return section is in communication with a rear end of the second forward section.

[0027] An acute angle aa is formed between a center line dd of the second forward section and the center line B of the rotating member, and an acute angle bb is formed between a center line ee of the second return section and the center line B of the rotating member, and the angle aa is smaller than the angle bb.

[0028] When the transmission member is in the second return section, at which moment the sharpening part is located on a left side of the blade part, and a gap is formed between the sharpening part and a left side surface of the blade part.

[0029] When the transmission member moves from the second return section to the second forward section, the rotating member rotates to the extent that the angle between the sharpening part and the blade part is reduced, such that the sharpening part comes into contact with the left side surface of the blade part.

[0030] As an improvement of the present invention, when a groove guiding mechanism is adopted, the transmission member is an elastic pin capable of elastically and axially expanding and retracting.

[0031] As an improvement of the present invention, the transmission member and the sharpening part are arranged opposite to each other along a same radial direction of the rotating member.

[0032] As an improvement of the present invention, the first forward section and the second forward section are arranged symmetrically about the center line B of the rotating member, and the first return section and the second return section are arranged symmetrically about the center line B of the rotating member.

[0033] As an improvement of the present invention, a front end of the first forward section is connected to a front end of the second return section through a first switching guiding groove, and a front end of the second forward section is connected to a front end of the first return section through a second switching guiding groove.

[0034] When the transmission member moves from the first forward section to the front end of the second return section, the rotating member drives the sharpening part to switch from a state of being at a position on the right side of the blade part to a state of being at a position on the left side of the blade part.

[0035] As an improvement of the present invention, the front end of the first return section and the front end of the second return section are respectively located at the front end of the first forward section and the front end of the second forward section.

[0036] The first switching guiding groove and the second switching guiding groove are arranged in a crisscrossed manner.

[0037] A guiding mechanism is provided at intersections of the first switching guiding groove and the second switching guiding groove, and the guiding mechanism includes a first blocking member and a second blocking member.

[0038] The first blocking member is rotatably disposed above a first intersection of the first switching guiding groove, and the transmission member entering the first switching guiding groove is able to form a blocking cooperation with the first blocking member to drive the first blocking member to rotate forward to a position above a second intersection of the second switching guiding groove.

[0039] The second blocking member is rotatably disposed above a third intersection of the second switching guiding groove, and the transmission member entering the second switching guiding groove is able to form a blocking cooperation with the second blocking member to drive the second blocking member to rotate forward to a position above a fourth intersection of the first switching guiding groove.

[0040] As an improvement of the present invention, when the sharpening part contacts the left side surface of the blade part, the track guiding mechanism is capable of guiding the rotating member as the rotating member moves forward, to keep the sharpening part in contact with the left side surface of the blade part, and guiding the rotating member to rotate until the sharpening part faces the right side surface of the blade part when the rotating member moves forward to a limit position.

[0041] When the rotating member moves backward, the track guiding mechanism guides the rotating member to keep the sharpening part out of contact with the right side surface of the blade part.

[0042] When the rotating member moves backward to a limit position, the track guiding mechanism is capable of guiding the rotating member to rotate until the sharpening part comes into contact with the right side surface of the blade part.

[0043] When the rotating member continues to move forward, the rotating member is guided to rotate until the sharpening part comes into contact with the right side surface of the blade part, and when the rotating member moves forward to the limit position, the rotating member is guided to rotate until the sharpening part faces the left side surface of the blade part.

[0044] When the rotating member moves backward, the rotating member is guided to keep the sharpening part out of contact with the left side surface of the blade, and when the rotating member moves backward to the limit position, the track guiding mechanism is capable of guiding the rotating member to rotate until the sharpening part comes into contact with the left side surface of the blade part.Brief Description of the Drawings

[0045] FIG. 1 is a schematic structural diagram of the present invention. FIG. 2 is a schematic structural diagram of a rotating member and a moving mechanism of the present invention. FIG. 3 is a front view of the present invention. FIG. 4 is a sectional view of the present invention taken along line FF in FIG. 3. FIG. 5 is an enlarged schematic diagram of the structure in area G in FIG. 4 of the present invention. FIG. 6 is a schematic structural diagram of the rotating member and a sharpening part of the present invention. FIG. 7 is a sectional view of the structure in FIG. 6 of the present invention. FIG. 8 is a schematic structural diagram of the knife fixing mechanism of the present invention when fixing a knife. FIG. 9 is a schematic structural diagram of the knife fixing mechanism of the present invention. FIG. 10 is a clamping claw of the knife fixing mechanism of the present invention. FIG. 11 is a schematic structural diagram of guiding grooves of the present invention. FIG. 12 is an enlarged schematic diagram of the structure in area H in FIG. 11 of the present invention.

[0046] Reference signs are as follows: 1, rotating member; 2, sharpening part; 3, moving mechanism; 4, transmission member; 5, first guiding groove; 5.1, first forward section; 5.2, first return section; 6, second guiding groove; 6.1, second forward section; 6.2, second return section; 7, first switching guiding groove; 7.1, first intersection; 7.2, fourth intersection; 8, second switching guiding groove; 8.1, second intersection; 8.2, third intersection; 9, first blocking member; 10, second blocking member; 11, slider; 11.1, guiding post; 11.2, control rod; 12, clamping claw; 12.1, clamping part; 12.2, engaging slot; 13, elastic member; 14, screw rod; 15, screw rod nut; 16, first motor; 17, mounting bracket; 18, second motor; 19, sanding belt rack; 19.1, rotating wheel; 20, unidirectional blocking member; 21, blade part; and 22, holding sleeve.Detailed Description of Embodiments

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] The present invention is explained with reference to FIGS. 1-12.

[0049] A knife sharpener includes: a rotating member 1 and a guiding assembly that is capable of guiding the rotating member 1 to rotate along an axis A; a sharpening part 2 arranged on the rotating member 1; and a moving mechanism 3 capable of driving the rotating member 1 to move forward and backward along a path of a blade part 21.

[0050] The rotation of the rotating member 1 drives the sharpening part 2 to move close to the blade part 21 so as to bring the sharpening part 2 into contact with the blade part 21, or drives the sharpening part 2 to move away from the blade part 21 so as to bring the sharpening part 2 out of contact with the blade part 21.

[0051] When the sharpening part 2 is in contact with the blade part 21, the rotating member 1 moves along an extending direction of the blade part 21 to sharpen the blade part 21.

[0052] The knife is first pre-positioned when the user needs to perform a knife sharpening operation, and the blade part 21 of the knife is arranged to face downward with the tip of the knife facing forward.

[0053] Preferably, a center line of the knife is located above and overlaps the axis A.

[0054] Further, the rotating member 1 rotates along the axis A and drives the sharpening part 2 on the rotating member 1 to come into contact with a side surface of the blade part 21, and the moving mechanism 3 drives the rotating member 1 to move along an extension (front and rear) direction of the blade part 21, so that the sharpening part 2 is able to sharpen the blade part 21.

[0055] The rotating member 1 is rotatable along the axis A, ensuring a better fitting between the sharpening part 2 and the side of the blade part 21, thereby improving the sharpening effect and making it adaptable to different types of blades (e.g., blades with varying thicknesses or heights at the blade part 21).

[0056] The moving mechanism 3 is capable of moving the rotating member 1 along the extension (front and rear) direction of the blade part 21 to achieve uniform and automatic sharpening of the side surface of the blade part 21.

[0057] After the sharpening of the blade part 21 is completed, the rotating member 1 rotates until the sharpening part 2 is out of contact with the blade part 21, so as to facilitate the user to withdraw the knife.

[0058] The rotating member 1 is provided with a transmission member 4.

[0059] The guiding assembly includes a groove guiding mechanism or a track guiding mechanism that is in a transmission connection with the transmission member.

[0060] When the moving mechanism 3 drives the rotating member 1 to move forward along the path of the blade part 21, the groove guiding mechanism or the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 contacts the blade part 21 through the transmission member 4.

[0061] When the moving mechanism drives the rotating member 1 to move backward along the path of the blade part 21, the groove guiding mechanism or the track guiding mechanism guides the rotating member to rotate until the sharpening part 2 is out of contact with the blade part 21 through the transmission member 4.

[0062] Referring to FIGS. 4-5, an embodiment of the groove guiding mechanism of the present invention is illustrated.

[0063] A first guiding groove 5 is provided.

[0064] The first guiding groove 5 includes a first forward section 5.1 extending in a front and rear direction, and a first return section 5.2 extending in the front and rear direction, and a rear end of the first return section 5.2 is connected to a rear end of the first forward section 5.1.

[0065] An acute angle a is formed between the center line d of the first forward section 5.1 and the center line B of the rotating member 1, and an acute angle b is formed between a center line e of the first return section 5.2 and the center line B of the rotating member 1, and the angle a is smaller than the angle b.

[0066] When the transmission member 4 is in the first return section 5.2, the sharpening part 2 is located on a right side of the blade part 21, and a gap is formed between the sharpening part 2 and a right side surface of the blade part 21.

[0067] As the transmission member 4 moves from the first return section 5.2 to the first forward section 5.1, the rotating member 1 is rotated to an extent that the angle between the sharpening part 2 and the blade part 21 is reduced, such that the sharpening part 2 is in contact with the side surface of the blade part 21.

[0068] As an improvement of the present invention, the groove guiding mechanism further includes a second guiding groove 6.

[0069] The second guiding groove 6 includes a second forward section 6.1 in the front and rear direction, and a second return section 6.2 extending in the front and rear direction, and a rear end of the second return section 6.2 is connected to a rear end of the second forward section 6.1.

[0070] An acute angle aa is formed between a center line dd of the second forward section 6.1 and the center line B of the rotating member 1, and an acute angle bb is formed between a center line ee of the second return section 6.2 and the center line B of the rotating member 1, and the angle aa is smaller than the angle bb.

[0071] When the transmission member 4 is in the second return section 6.2, the sharpening part 2 is located on a left side of the blade part 21, and a gap is formed between the sharpening part 2 and a right side surface of the blade part 21.

[0072] As the transmission member 4 moves from the second return section 6.2 to the second forward section 6.1, the rotating member 1 is rotated to an extent that the angle between the sharpening part 2 and the blade part 21 is reduced, such that the sharpening part 2 is in contact with the side surface of the blade part 21.

[0073] With the above improvements, the first forward section 5.1, the first return section 5.2, the second forward section 6.1, and the second return section 6.2 are all configured as inclined structures, forming an acute angle with the center line B of the rotating member 1, respectively.

[0074] The angle a is formed between the center line of the first forward section 5.1 and the center line B of the rotating member 1, and the angle b is formed between the center line of the first return section 5.2 and the center line B of the rotating member 1.

[0075] The angle aa is formed between the center line of the second forward section 6.1 and the center line B of the rotating member 1, and the angle bb is formed between the second return section 6.2 and the center line B of the rotating member 1.

[0076] The angle a is consistent with the angle aa, and the angle b is consistent with the angle bb.

[0077] When the transmission member 4 enters the first return section 5.2 or the second return section 6.2, the change in the angle causes the rotating member 1 to rotate away from the blade part 21, thereby driving the sharpening part 2. The angle between the sharpening part 2 and the blade part 21 increases, and a gap is formed between the sharpening part 2 and the side surface of the blade part 21. The sharpening part 2 is out of contact with the blade part 21, thus the sharpening part 2 is not able to sharpen the blade part 21.

[0078] When the transmission member 4 enters the first forward section 5.1 or the second forward section 6.1 from the return section, the change in the angle causes the rotating member 1 to rotate close to the blade part 21, thereby driving the sharpening part 2. The angle between the sharpening part 2 and the blade part 21 is reduced, and the gap between the sharpening part 2 and the blade part 21 is reduced such that the sharpening part 2 is in contact with the side surface of the blade part 21, thus the sharpening part 2 is able to sharpen the blade part 21.

[0079] With the above improvements, the change of the guiding groove angle is utilized to drive the rotation of the rotating member 1 through the transmission member 4, which in turn drives the sharpening part 2, resulting in a stable and reliable operation.

[0080] In this embodiment, two rotating members 1 with overlapping rotating shafts can be used. The two rotating members 1 are driven to move by the moving mechanism 3 respectively. The two rotating members 1 are respectively provided with a sharpening part 2. The transmission members 4 of the two rotating members 1 independently cooperate with the first guiding groove 5 or the second guiding groove 6. The sharpening part 2 corresponding to the rotating member 1 that cooperates with the first guiding groove 5 sharpens the right side surface of the blade part 21, and the sharpening part 2 corresponding to the rotating member 1 that cooperates with the second guiding groove 6 sharpens the left side surface of the blade part 21.

[0081] When the groove guiding mechanism is adopted, the transmission member 4 is an elastic pin and can be elastically extended and retracted axially.

[0082] As shown in FIG. 5, the transmission member 4 is an elastic pin that is capable of axially expanding and retracting. Preferably, a depth of the groove of the first forward section 5.1 is greater than a depth of the groove of the first return section 5.2, and a depth of the groove of the second forward section 6.1 is greater than a depth of the groove of the second return section 6.2.

[0083] The elastic transmission member 4 that is axially expandable and retractable extends and fits with the first forward section 5.1 after entering the first return section 5.2 from the first return section 5.2, so as to avoid an accidental return to the first return section 5.2.

[0084] The transmission member 4 extends and fits with the second forward section 6.1 after entering the second forward section 6.1 from the second return section 6.2 to avoid an accidental return to the second return section 6.2.

[0085] Referring to FIGS. 4 and 7, the transmission member 4 and the sharpening part 2 are arranged opposite to each other along a radial direction of the rotating member 1.

[0086] The transmission member 4 and the sharpening part 2 are arranged opposite to each other along the radial direction, so that the cooperation between the transmission member 4 and the groove guiding mechanism or the track guiding mechanism can be more effectively fed back to the sharpening part 2.

[0087] Referring to FIGS. 2 and 4, the first forward section 5.1 and the second forward section 6.1 are symmetrically arranged about the center line B of the rotating member 1, and the first return section 5.2 and the second return section 6.2 are symmetrically arranged about the center line B of the rotating member 1.

[0088] With the above improvements, the structural layout becomes more reasonable, and the distance to the blade part 21 remains consistent, enabling more effective and uniform sharpening of the blade.

[0089] Referring to FIGS. 4, 11, and 12, the front end of the first forward section 5.1 is in communication with the front end of the second return section 6.2 via the first switching guiding groove 7, and the front end of the second forward section 6.1 is in communication with the front end of the first return section 5.2 via the second switching guiding groove 8.

[0090] As the transmission member 4 moves from the first forward section 5.1 to the front end of the second return section 6.2, the rotating member 1 drives the sharpening part 2 to switch from a state of being at a position located on the right side of the blade part 21 to a state of being at a position located on the left side of the blade part 21.

[0091] In this embodiment, only one rotating member 1 is used, and the rear end of the first forward section 5.1 serves as the starting point of the movement of the transmission member 4. At this moment, the sharpening part 2 is in contact with a rear end of the right side surface of the blade part 21.

[0092] Further, the moving mechanism 3 drives the rotating member 1 to move forward along the first forward section 5.1, and the transmission member 4 continues to move forward in the first forward section 5.1, no angle being changed in the first forward section 5.1, thus the rotating member 1 is unable to rotate, and the sharpening part 2 continues to move forward along the path of the blade part 21, uniformly and efficiently sharpening the right side surface of the blade part 21.

[0093] Furthermore, the moving mechanism 3 continues to drive the rotating member 1 to move forward, and the transmission member 4 enters through the first switching guiding groove 7 into a position opposite to the rear end of the first return section 5.2.

[0094] Then, the moving mechanism 3 drives the rotating member 1 to move backward, and the transmission member 4 enters the front end of the second return section 6.2. Due to the angle of the second return section 6.2, the rotating member 1 rotates until the sharpening part 2 is located on the left side of the blade part 21, and a gap is formed between the sharpening part 2 and the blade part.

[0095] The transmission member 4 moves backward along the second return section 6.2 to the rear end of the second forward section 6.1. Due to the angle of the second forward section 6.1, the rotating member 1 rotates until the sharpening part 2 comes into contact with the left side surface of the blade part 21.

[0096] Further, the moving mechanism 3 drives the rotating member 1 to move forward, and the transmission member 4 continues to move forward in the second forward section, so that the sharpening part 2 is able to uniformly and efficiently sharpen the left side surface of the blade part 21.

[0097] Furthermore, the transmission member 4 enters the second switching guiding groove 8 and enters the front end of the first return section 5.2. The moving mechanism 3 drives the rotating member 1 to move backward, and the transmission member 4 moves to the rear end along the first return section 5.2.

[0098] With the above improvements, the two side surfaces of the blade part 21 can be sharpened by utilizing one rotating member 1 and its sharpening part 2, which results in a high consistency of grinding effect, a simple structure and relatively low costs.

[0099] When one rotating member 1 is utilized, preferably, a unidirectional blocking member 20 for blocking and limiting is respectively provided at the rear end of the first return section 5.2 and the rear end of the second return section 6.2. When the transmission member 4 moves to the rear end, the unidirectional blocking member 20 is driven to rotate outward, so that the rear ends of the first forward section 5.1 and the second forward section 6.1 are exposed, and the transmission member 4 can enter the rear end of the first forward section 5.1 or the second forward section 6.1. After the transmission member 4 enters, the unidirectional blocking member 20 is capable of elastically returning to its original position, rotating back to the rear end of the first return section 5.2 or the rear end of the second return section 6.2.

[0100] With the above improvements, the rotating member 1 is prevented from accidentally entering the first return section 5.2 or the second return section 6.2 when moving forward, so that the operation reliability of the device is enhanced.

[0101] The front end of the first return section 5.2 and the front end of the second return section are located at the front end of the first forward section 5.1 and the front end of the second forward section 6.1, respectively.

[0102] The first switching guiding groove 7 and the second switching guiding groove 8 are arranged in a crisscrossed manner.

[0103] A guiding mechanism is provided at the intersection, and the guiding mechanism includes a first blocking member 9 and a second blocking member 10.

[0104] The first blocking member 9 is rotatably disposed above the first intersection 7.1 of the first switching guiding groove 7, and the transmission member 4 entering the first switching guiding groove 7 forms a blocking cooperation with the first blocking member 9 to drive the first blocking member 9 to rotate forward to a position above the second intersection 8.1 of the second switching guiding groove 8.

[0105] The second blocking member 10 is rotatably placed on the third intersection 8.2 of the second switching guiding groove 8, and the transmission member 4 entering the second switching guiding groove 8 can form a blocking fit with the second blocking member 10 to drive the second blocking member 10 to rotate forward to a position above the fourth intersection 7.2 of the first switching guiding groove 7.

[0106] With the above improvements, the crisscrossed configuration of the first switching guiding groove 7 and the second switching guiding groove 8 enables a more compact structure, which is conducive to the miniaturization of the device.

[0107] When the transmission member 4 moves forward into the first switching guiding groove 7 and drives the first blocking member 9 to rotate forward to the position above the second intersection 8.1 of the second switching guiding groove 8, the second blocking member 10 is still located above the third intersection 8.2 of the second switching guiding groove 8. The first blocking member 9 prevents the transmission member 4 from entering the second intersection 8.1, and the second blocking member 10 prevents the transmission member 4 from entering the third intersection 8.2, so that the transmission member 4 can stably pass through the first intersection 7.1 and the fourth intersection 7.2 and enter the rear end of the second return section 6.2.

[0108] When the transmission member 4 moves forward into the second switching guiding groove 8 and drives the second blocking member 10 to rotate forward to the position above the fourth intersection 7.2 of the first switching guiding groove 7, the first blocking member 9 is still located above the first intersection 7.1 of the first switching guiding groove 7. The first blocking member 9 prevents the transmission member 4 from entering the first intersection 7.1, and the second blocking member 10 prevents the transmission member 4 from entering the fourth intersection 7.2, wo that the transmission member 4 can stably pass through the second intersection 8.1 and the third intersection 8.2 and enter the rear end of the first return section 5.2.

[0109] In addition, the first blocking member 9 and the second blocking member 10 are respectively connected with a torsion spring. After the first blocking member 9 and the second blocking member 10 are out of contact with the transmission member 4, the torsion springs drive the first blocking member 9 and the second blocking member 10 to return to the initial position.

[0110] With the above improvements, the structure can operate stably and reliably, improving the user experience.

[0111] Referring to FIGS. 1, 2, 8, 9 and 10, a knife fixing mechanism is further provided, which includes two clamping claws 12 arranged opposite to each other and a slider 11. The outer ends of the two clamping claws 12 are rotatable to adjust a clamping space between the two clamping claws 12 on the inner side when rotating.

[0112] The slider 11 is arranged below and is in a transmission connection with the clamping claws 12, the slider 11 moves forward to drive the clamping claws 12 to rotate forward so as to increase the clamping space, and the slider 11 moves backward to drive the clamping claws 12 to rotate backward so as to reduce the clamping space.

[0113] Guiding posts 11.1 are protruded from an upper end surface of the slider 11, and engaging slots 12.2 are respectively provided below the clamping claws 12. The engaging slots 12.2 are extended inwardly with the guiding posts 11.1 inserted therein. When the slider 11 moves forward and backward, the clamping claws 12 are able to be rotated forward and backward through the cooperation between the guiding posts 11.1 and the engaging slots 12.2.

[0114] The slider 11 is connected to an elastic member 13, which may be a spring. One end of the spring is limited, and the other end thereof is abutted against the front end of the slider 11, forcing the slider 11 to always have a tendency to move backward.

[0115] The clamping claws 12 are provided with clamping parts 12.1 close to each other on the inner sides, and a clamping space is formed between the inner sides of the clamping parts 12.1. When the clamping claws 12 rotate, the clamping parts 12.1 on the inner sides can rotate inward or outward.

[0116] The slider 11 is connected with a control rod 11.2. When the knife needs to be positioned, the control rod 11.2 is first pressed forward, the control rod 11.2 drives the slider 11 to move forward, and the slider 11 drives the two clamping claws 12 to rotate outward, such that the clamping space is increased, and the knife can be placed in the clamping space.

[0117] Furthermore, when the control lever 11.2 is released, and under the action of the elastic member 13, the slider 11 moves backward and drives the two clamping claws 12 to rotate inward, such that the clamping space is reduced, and the inner sides of the clamping claws 12 can firmly clamp the knife.

[0118] Furthermore, the blade can be sharpened. After the sharpening is completed, the control lever 11.2 is pressed forward to release the knife from the clamping claws 12, and the sharpened knife can be withdrawn.

[0119] With the above improvements, the position of the knife is stable, preventing movement during the sharpening process, and thereby achieving a better sharpening effect.

[0120] In addition, the operation of the knife fixing mechanism is simple and easy to operate.

[0121] The fixing mechanism further includes a holding sleeve 22 arranged in front of the clamping claws 12. The holding sleeve 22 is capable of elastically increasing or decreasing an inner hole diameter to be adapted for clamping a variety of knives, and with the clamping space clamping the knife, the position of the knife can be more stable.

[0122] Referring to FIGS. 1 and 2, the moving mechanism 3 includes a screw rod 14 and a screw nut 15. One end of the screw rod 14 is in a transmission connection with an output end of the motor, the screw nut 15 is sleeved on the screw rod 14, a mounting bracket 17 is provided on the screw nut 15, and the rotating member 1 is connected to the mounting bracket 17.

[0123] Preferably, a bearing is provided on the mounting bracket 17, and the rotating member 1 cooperates and is connected with the bearing, so that the rotation can be smoother, and jamming can be prevented during the operation.

[0124] The motor is used to drive the screw rod 14 to rotate, which in turn drive the screw nut 15 to move the mounting bracket 17 forward and backward, thereby driving the rotating member 1 to move and enabling the transmission member 4 to stably move in the corresponding guiding grooves.

[0125] As an improvement of the present invention, the sharpening part may also be a component that is capable of sharpening the blade, such as a ceramic body, a fine steel rod, and the like.

[0126] In the present invention, the sharpening part 2 utilizes a sanding belt. A motor is provided on the mounting bracket 17, and an output end of the motor extends into the inner side of the rotating member 1.

[0127] The rotating member 1 is provided with a sanding belt rack 19, the sanding belt rack 19 is provided with two rotating wheels 19.1, and the sanding belt is sleeved on the two rotating wheels 19.1.

[0128] One of the rotating wheels 19.1 is linked to the output end of the motor.

[0129] When the rotating member 1 rotates, the sanding belt rack 19 is driven to rotate synchronously.

[0130] With the above improvements, the motor is utilized to drive the sanding belt to rotate, and an outer peripheral surface of the sanding belt can grind the blade part 21 after being brought into contact with the blade part 21, which has high sharpening efficiency and better sharpening effect.

[0131] Referring to FIG. 5, the transmission member 4 is an elastic pin and is capable of axially expanding and retracting.

[0132] Referring to the embodiment of the present invention using the track guiding mechanism, when the sharpening part 2 is in contact with the left side surface of the blade part 21, as the rotating member 1 moves forward, the track guiding mechanism guides the rotating member 1 to maintain the state in which the sharpening part 2 is in contact with the left side surface of the blade part 21, and as the rotating member 1 moves forward to a limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 faces the right side surface of the blade part 21.

[0133] When the rotating member 1 moves backward, the track guiding mechanism guides the rotating member 1 such that the sharpening part 2 is kept out of contact with the right side surface of the blade part 21.

[0134] When the rotating member 1 moves backward to a limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 comes into contact with the right side surface of the blade part 21.

[0135] When the rotating member 1 continues to move forward, the rotating member 1 is guided to rotate until the sharpening part 2 comes into contact with the right side surface of the blade part 21, and when the rotating member 1 moves forward to the limit position, the rotating member 1 is guided to rotate until the sharpening part 2 faces the left side surface of the blade part 21.

[0136] When the rotating member 1 moves backward, the rotating member 1 is guided to keep the sharpening part 2 out of contact with the left side surface of the blade part 21, and when the rotating member 1 moves backward to the limit position, the track guiding mechanism guides the rotating member 1 to rotate until the sharpening part 2 is in contact with the left side surface of the blade part 21.

[0137] The above are merely preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the scope of protection of the present invention. It should be noted that for a person of ordinary skill in the art, several improvements and modifications made without departing from the principle of the present invention should also be construed as the scope of protection of the present invention.

Examples

Embodiment Construction

[0047]The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048]The present invention is explained with reference to FIGS. 1-12.

[0049]A knife sharpener includes:

a rotating member 1 and a guiding assembly that is capable of guiding the rotating member 1 to rotate along an axis A; a sharpening part 2 arranged on the rotating member 1; and a moving mechanism 3 capable of driving the rotating member 1 to move forward and backward along a path of a blade part 21.

[0050]The rotation of the rotating member 1 drives the sharpening part 2 to move close to the blade part 21 so as to bring the sharpening part 2 into contact with the blade part 21, or drives the sharpening part 2 to move away from the blade part 21 so as to bring the sharpening part 2 out of contact with the blade part 21.

[0051]When the sharpening part 2 is in contact with the blade part 21, the rotating member 1 moves along an extending direction of the...

Claims

1. A knife sharpener, characterized in that it comprises: a rotating member (1), and a guiding assembly, wherein the guiding assembly is capable of guiding the rotating member (1) to rotate along an axis A; a sharpening part (2) arranged on the rotating member (1); a moving mechanism (3) capable of driving the rotating member (1) to move in a front and rear direction along a path of a blade part (21); wherein rotation of the rotating member (1) drives the sharpening part (2) to approach the blade part (21) to a position in contact with the blade part (21), or drives the sharpening part (2) to move away from the blade part (21) to a position out of contact with the blade part (21); and when the sharpening part (2) is in contact with the blade part (21), the rotating member (1) moves along an extension direction of the blade part (21) to sharpen the blade part (21).

2. The knife sharpener according to claim 1, characterized in that, a transmission member (4) is arranged on the rotating member (1); the guiding assembly comprises a groove guiding mechanism or a track guiding mechanism that is in transmission engagement with the transmission member (4); when the moving mechanism (3) drives the rotating member (1) to move forward along the path of the blade part, the groove guiding mechanism or the track guiding mechanism guides the rotating member (1) to rotate through the transmission member (4) until the sharpening part (2) is in contact with the blade (21); and when the moving mechanism drives the rotating member (1) to move backward along the path of the blade part (21), the groove guiding mechanism or the track guiding mechanism guides the rotating member (1) to rotate through the transmission member (4) until the sharpening part (2) is out of contact with the blade part (21).

3. The knife sharpener according to claim 2, characterized in that, the groove guiding mechanism comprises a first guiding groove (5); the first guiding groove (5) comprises a first forward section (5.1) extending in the front and rear direction, and a first return section (5.2) extending in the front and rear direction, a rear end of the first return section (5.2) is in communication with a rear end of the first forward section (5.1); an acute angle a is formed between a center line d of the first forward section (5.1) and a center line B of the rotating member (1), and an acute angle b is formed between a center line e of the first return section (5.2) and the center line B of the rotating member (1), wherein the angle a is smaller than the angle b; when the transmission member (4) is in the first return section (5.2), the sharpening part (2) is located a right side of the blade part (21), and a gap is formed between the sharpening part (2) and a right side surface of the blade part (21); and when the transmission member (4) moves from the first return section (5.2) to the first forward section (5.1), the rotating member (1) rotates to an extent that an angle between the sharpening part (2) and the blade part (21) is reduced, such that the sharpening part (2) comes into contact with the right side surface of the blade part (21).

4. The knife sharpener according to claim 3, characterized in that, the groove guiding mechanism further comprises a second guiding groove (6); the second guiding groove (6) comprises a second forward section (6.1) extending in the front and rear direction, and a second return section (6.2) extending in the front and rear direction, a rear end of the second return section (6.2) is in communication with a rear end of the second forward section (6.1); an acute angle aa is formed between a center line dd of the second forward section (6.1) and the center line B of the rotating member (1), and an acute angle bb is formed between a center line ee of the second return section (6.2) and the center line B of the rotating member (1), wherein the angle aa is smaller than the angle b; when the transmission member (4) is in the second return section (6.2), the sharpening part (2) is located on a left side of the blade part (21), and a gap is formed between the sharpening part (2) and a left side surface of the blade part (21); when the transmission member (4) moves from the second return section (6.2) to the second forward section (6.1), the rotating member (1) rotates to an extent that the angle between the sharpening part (2) and the blade part (21) is reduced, such that the sharpening part (2) comes into contact with the left side surface of the blade part (21).

5. The knife sharpener according to claim 4, characterized in that, when the groove guiding mechanism is adopted, the transmission member (4) is an elastic pin capable of elastically and axially expanding and retracting.

6. The knife sharpener according to claim 5, characterized in that the transmission member (4) and the sharpening part (2) are arranged opposite to each other along a same radial direction of the rotating member (1).

7. The knife sharpener according to claim 4, characterized in that the first forward section (5.1) and the second forward section (6.1) are arranged symmetrically about the center line B of the rotating member (1), and the first return section (5.2) and the second return section (6.2) are arranged symmetrically about the center line B of the rotating member (1).

8. The knife sharpener according to claim 4, characterized in that a front end of the first forward section (5.1) is connected to a front end of the second return section (6.2) through a first switching guiding groove (7), and a front end of the second forward section (6.1) is connected to a front end of the first return section (5.2) through a second switching guiding groove (8); and when the transmission member (4) moves from the first forward section (5.1) to the front end of the second return section (6.2), the rotating member (1) drives the sharpening part (2) to switch from a state of being at a position located on the right side of the blade part (21) to a state of being at a position located on the left side of the blade part (21).

9. The knife sharpener according to claim 8, characterized in that the front end of the first return section (5.2) and the front end of the second return section are located at the front end of the first forward section (5.1) and the front end of the second forward section (6.1), respectively; the first switching guiding groove (7) and the second switching guiding groove (8) are arranged in a crisscrossed manner; a guiding mechanism is provided at intersections of the first switching guiding groove (7) and the second switching guiding groove (8), and the guiding mechanism comprises a first blocking member (9) and a second blocking member (10); the first blocking member (9) is rotatably disposed above a first intersection (7.1) of the first switching guiding groove (7), and the transmission member (4) entering the first switching guiding groove (7) is able to form a blocking cooperation with the first blocking member (9) to drive the first blocking member (9) to rotate forward to a position above a second intersection (8.1) of the second switching guiding groove (8); and the second blocking member (10) is rotatably disposed on a third intersection (8.2) of the second switching guiding groove (8), and the transmission member (4) entering the second switching guiding groove (8) is able to form a blocking cooperation with the second blocking member (10) to drive the second blocking member (10) to rotate forward to a position above a fourth intersection (7.2) of the first switching guiding groove (7).

10. The knife sharpener according to claim 3, characterized in that, when the sharpening part (2) contacts the left side surface of the blade part (21), the track guiding mechanism is capable of guiding the rotating member (1) as the rotating member (1) moves forward, to keep the sharpening part (2) in contact with the left side surface of the blade part (21), and guiding the rotating member (1) to rotate until the sharpening part (2) faces the right side surface of the blade part (21) when the rotating member (1) moves forward to a limit position; when the rotating member (1) moves backward, the track guiding mechanism guides the rotating member (1) to keep the sharpening part (2) out of contact with the right side surface of the blade part (21); when the rotating member (1) moves backward to a limit position, the track guiding mechanism guides the rotating member (1) to rotate until the sharpening part (2) comes into contact with the right side surface of the blade part (21); when the rotating member (1) continues to move forward, the rotating member (1) is guided to rotate until the right side surface of the sharpening part (2) comes into contact with the blade part (21); and when the rotating member (1) moves forward to a limit position, the rotating member (1) is guided to rotate until the sharpening part (2) faces the left side surface of the blade part (21); and when the rotating member moves backward, the rotating member (1) is guided to keep the sharpening part (2) out of contact with the left side surface of the blade part, and when the rotating member (1) moves backward to a limit position, the track guiding mechanism guides the rotating member (1) to rotate until the sharpening part (2) comes into contact with the left side surface of the blade part (21).

Images