An interchangeable handle and weight-adjustable kitchen knife

Abstract

The application discloses a replaceable handle and a kitchen knife with adjustable weight, which comprises a handle sleeve, a knife body and a counterweight connecting piece. The handle sleeve is provided with an accommodation space which penetrates through the handle sleeve along the axial direction of the handle sleeve. The knife body is provided with a knife body connecting part which is arranged in the accommodation space. The counterweight connecting piece is partially arranged in the accommodation space, and the counterweight connecting piece is detachably connected to the knife body connecting part and clamps the handle sleeve together with the knife body. An end of the counterweight connecting piece away from the knife body is provided with a dismounting interface which is connected to an external dismounting tool. Thus, the replaceable handle and the kitchen knife with adjustable weight are designed as a detachable structure, so that when the knife body is worn out or the handle is damaged, the user only needs to replace the corresponding parts, and the replaceable handle and the kitchen knife with adjustable weight do not need to be discarded as a whole, the service life of the product is significantly prolonged, and the use cost is reduced.

Description

Technical Field

[0001] This application relates to the field of kitchen utensil technology, and in particular to a kitchen knife with a replaceable handle and adjustable weight. Background Technology

[0002] The most basic function of kitchen knives is to process various ingredients (such as vegetables, fruits, meats, fish, bread, etc.) into slices, shreds, cubes, minces, bones, and skins, either finely or coarsely, to meet the cooking needs and taste requirements of different dishes.

[0003] However, kitchen knives generally adopt an integrated fixed structure, and their handles and blades (or blades) are usually connected by welding or riveting. Once the blade wears down and breaks or the handle is damaged, the entire kitchen knife is often forced to be scrapped because it cannot be disassembled, resulting in a waste of resources. Utility Model Content

[0004] This application provides a kitchen knife with a replaceable handle and adjustable weight, which can solve at least one of the above-mentioned technical problems.

[0005] This application provides a kitchen knife with a replaceable handle and adjustable weight, including:

[0006] The handle sleeve has a receiving space that extends through the handle sleeve along its axial direction.

[0007] The blade body includes a blade body connecting portion, which is disposed within an accommodating space; and

[0008] The counterweight connector is partially housed within the receiving space. The counterweight connector is detachably connected to the blade body connection and together with the blade body clamps the handle sleeve. The end of the counterweight connector facing away from the blade body has a disassembly interface for connecting to an external disassembly tool.

[0009] In some embodiments, the cutter body connecting portion includes an anti-rotor portion and a connecting sub-portion, wherein the anti-rotor portion is connected between the cutter body and the connecting sub-portion;

[0010] The handle sleeve has an anti-rotation hole, a connecting hole and a receiving hole connected in sequence along its axial direction. The anti-rotation part is located in the anti-rotation hole, the connecting part passes through the connecting hole, a part of the counterweight connector is located in the receiving hole and is detachably connected to the connecting part, and the other part of the counterweight connector is located outside the receiving hole and together with the blade body clamps the handle sleeve.

[0011] In some embodiments, the handle sleeve includes a plurality of first handle portions, second handle portions and third handle portions connected in sequence. The first handle portion is provided with an anti-rotation hole, the second handle portion is provided with a communication hole, and the third handle portion is provided with a receiving hole. The second handle portion abuts between the anti-rotation portion and the counterweight connector.

[0012] In some implementations, the counterweight connector is threaded to the connector portion.

[0013] In some implementations, the cross-sectional area of ​​the anti-rotor portion gradually decreases from the blade body towards the connecting part.

[0014] In some embodiments, the outer contour of the cross-sectional area of ​​the anti-rotation portion and the outer contour of the cross-sectional area of ​​the anti-rotation hole are non-circular.

[0015] In some embodiments, the counterweight connector includes a first counterweight and a second counterweight connected to each other. The first counterweight is located inside the receiving hole and is threaded to the connecting part. The second counterweight is located outside the receiving hole and together with the blade body clamps the handle sleeve. The side of the second counterweight away from the first counterweight is provided with a disassembly interface.

[0016] In some implementations, the diameter of the connecting hole is smaller than the diameter of the anti-rotation hole and the diameter of the receiving hole.

[0017] In some implementations, the blade connecting part, the handle sleeve, and the counterweight connecting part are arranged coaxially.

[0018] In some implementations, there are multiple counterweight connectors, each with a different weight, and any one of the counterweight connectors can be used with the handle sleeve and the blade body.

[0019] The replaceable handle and adjustable weight kitchen knife provided in this application includes a handle sleeve, a blade body, and a counterweight connector. The handle sleeve has a receiving space extending through it along its axial direction. The blade body has a connecting portion disposed within the receiving space. The counterweight connector is partially disposed within the receiving space, detachably connected to the connecting portion, and together with the blade body, clamps the handle sleeve. The end of the counterweight connector facing away from the blade body has a disassembly interface for connecting to an external disassembly tool. Thus, by designing the handle sleeve, blade body, and counterweight connector as detachable components, when the blade body wears or the handle is damaged, the user only needs to replace the corresponding parts, without discarding the entire replaceable handle and adjustable weight kitchen knife, significantly extending product lifespan and reducing usage costs. Furthermore, the counterweight connector is detachable and features a standardized disassembly interface, allowing users to easily replace it with different weights according to their usage habits or operational needs. This adjusts the overall center of gravity and feel of the replaceable handle and the adjustable-weight kitchen knife, satisfying the different needs of professional chefs for "stable cutting with a heavy knife" and home users for "lightweight and flexible" operation. Moreover, the counterweight connector and the knife body clamp the handle sleeve from both sides, forming a stable axial clamping force. This ensures that the handle sleeve will not loosen or fall off during high-frequency cutting or vigorous chopping, balancing detachability and safety. Additionally, the end of the counterweight connector facing away from the knife body has a disassembly interface (such as an internal hexagonal hole, Phillips head, or quick-release latch) for use with external disassembly tools. Users can quickly install the knife body, replace the handle, or adjust the counterweight using common tools, making operation simple. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of a kitchen knife with a replaceable handle and adjustable weight, provided in an embodiment of this application.

[0022] Figure 2 for Figure 1 A structural diagram showing the disassembled structure of a kitchen knife with a replaceable handle and adjustable weight.

[0023] Figure 3 Bit Figure 2 A schematic diagram of the middle handle sleeve.

[0024] Figure 4A schematic diagram of the structure of a kitchen knife with a replaceable handle and adjustable weight is provided in another embodiment of this application.

[0025] Explanation of icon numbers:

[0026] 10. Kitchen knife with replaceable handle and adjustable weight; 100. Handle sleeve; 101. Receiving space; 102. Anti-rotation hole; 103. Connecting hole; 104. Receiving hole; 110. First handle part; 120. Second handle part; 130. Third handle part; 200. Knife body; 210. Knife body connecting part; 211. Anti-rotation part; 212. Connecting part; 300. Counterweight connector; 310. First counterweight part; 320. Second counterweight part; 321. Disassembly interface;

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0029] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0030] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please see Figure 1This application proposes a kitchen knife 10 with a replaceable handle and adjustable weight. The kitchen knife 10 with a replaceable handle and adjustable weight can perform fine or coarse processing of various ingredients (such as vegetables, fruits, meat, fish, bread, etc.) such as slicing, shredding, dicing, chopping, deboning, and peeling to meet the cooking needs and taste requirements of different dishes.

[0033] Please see Figure 2 The kitchen knife 10 with replaceable handle and adjustable weight includes a handle sleeve 100, a blade body 200, and a counterweight connector 300. The handle sleeve 100 has a receiving space 101 extending through the handle sleeve 100 along its axial direction. The blade body 200 has a blade connecting portion 210 disposed within the receiving space 101. The counterweight connector 300 is partially disposed within the receiving space 101, detachably connected to the blade connecting portion 210, and together with the blade body 200, clamps the handle sleeve 100. The end of the counterweight connector 300 facing away from the blade body 200 has a disassembly interface 321 for connecting to an external disassembly tool.

[0034] Thus, the replaceable handle and adjustable weight kitchen knife 10 of this application are designed with a detachable structure for the handle sleeve 100, the knife body 200 and the counterweight connector 300. When the knife body 200 is worn or the handle is damaged, the user only needs to replace the corresponding parts, without having to discard the replaceable handle and adjustable weight kitchen knife 10 as a whole. This significantly extends the product's service life, reduces usage costs and minimizes resource waste.

[0035] In addition, the counterweight connector 300 is detachable and has a standardized disassembly interface 321, which makes it easy for users to replace the counterweight connector 300 with different weights according to their usage habits or operational needs. This allows for adjustment of the overall center of gravity and feel of the replaceable handle and the kitchen knife 10 with adjustable weight, meeting the different needs of professional chefs for "stable cutting with heavy knives" and home users for "lightweight and flexible".

[0036] Moreover, the counterweight connector 300 and the blade body 200 clamp the handle sleeve 100 together from both sides, forming a stable axial clamping force, ensuring that the handle sleeve 100 will not loosen or fall off during high-frequency cutting or heavy chopping, thus taking into account both detachability and safety of use.

[0037] Meanwhile, the counterweight connector 300 is provided with a disassembly interface 321 (such as an internal hexagonal hole, cross slot, or quick-release bayonet) at the end opposite to the blade body 200, which can be used with external disassembly tools. Users can quickly complete the installation of the blade body 200, handle replacement, or counterweight adjustment with the help of general tools, making the operation simple.

[0038] The handle sleeve 100 has a hollow cylindrical structure with an axially extending receiving space 101 inside. This receiving space 101 is used to accommodate the connecting part of the blade body 200 and a part of the counterweight connecting member 300. The handle sleeve 100 can be made of plastic, wood, aluminum alloy or composite materials, and the outer surface can be ergonomically designed with anti-slip textures or grip grooves to improve user comfort.

[0039] The blade body 200 is made of high-hardness stainless steel, with a cutting edge formed at the front end and a blade body connecting part 210 extending from the rear end. The blade body connecting part 210 has a columnar or stepped structure, and its size matches the inner cavity of the handle sleeve 100, so that it can be smoothly inserted into the receiving space 101 and maintain stable positioning in the axial direction.

[0040] The counterweight connector 300 is a cylindrical or stepped component made of metal or high-density composite material. One end of the connector has an internal thread, a snap-fit ​​groove, or other type of connection structure, which allows for detachable fixing to the knife body connection part 210. The counterweight connector 300 is partially inserted into the handle sleeve 100, and is located at both ends of the handle sleeve 100 along with the knife body 200. In the tightened state, they jointly apply an axial clamping force to the sleeve, making the entire replaceable handle and adjustable weight kitchen knife 10 structure secure and reliable.

[0041] At the end of the counterweight connector 300 opposite to the blade body 200, a standard disassembly interface 321 is provided, such as an internal hexagonal hole, flathead slot, Phillips head slot, or magnetic quick-release interface. This interface allows users to perform installation or disassembly operations using common tools (such as hex wrenches, screwdrivers) or dedicated quick-release devices. By replacing the counterweight connector 300 with different qualities or materials, users can flexibly adjust the overall weight and center of gravity position of the replaceable handle and the adjustable-weight kitchen knife 10 to adapt to different food processing needs.

[0042] In practical use, the user first inserts the blade connecting part 210 into one end of the handle sleeve 100, and then screws or snaps the counterweight connecting part 300 into the blade connecting part 210 from the other end until the handle sleeve 100 is tightly clamped between the two. When it is necessary to replace the handle appearance, adjust the counterweight, or clean the interior, simply use a tool to loosen the counterweight connecting part 300 to easily separate the components. When discarded, the blade 200, handle sleeve 100, and counterweight connecting part 300 can be classified as metal and non-metal materials respectively, and enter the corresponding recycling process, reducing environmental pollution.

[0043] Please see Figure 2 and Figure 3In some embodiments, the blade body connecting portion 210 includes an anti-rotor portion 211 and a connecting sub-portion 212, with the anti-rotor portion 211 connected between the blade body 200 and the connecting sub-portion 212. The anti-rotor portion 211 is directly connected to the tail end of the blade body 200 and extends rearward to be fixedly connected to the connecting sub-portion 212. This structure clearly divides the mechanical transmission path of the blade body 200 into an anti-torsion section and a connecting section, ensuring effective torque transmission and facilitating reliable assembly with the counterweight connecting member 300.

[0044] The handle sleeve 100 has an anti-rotation hole 102, a connecting hole 103, and a receiving hole 104 connected sequentially along its axial direction. The anti-rotation part 211 is disposed within the anti-rotation hole 102. The anti-rotation hole 102, located near the blade body 200, has a cross-sectional shape that matches the anti-rotation part 211. It is typically a non-circular structure, such as a polygon, ellipse, D-shape, or an irregular cross-section with positioning protrusions. When the anti-rotation part 211 is inserted into the anti-rotation hole 102, the two form a circumferential limiting fit, effectively preventing the blade body 200 from rotating relative to the handle sleeve 100 during use, ensuring the stability and safety of the cutting operation.

[0045] The connecting part 212 passes through the connecting hole 103, which is located between the anti-rotation hole 102 and the receiving hole 104. The connecting hole 103 has an inner diameter slightly larger than the outer diameter of the connecting part 212, forming a clearance fit to allow the connecting part 212 to pass smoothly. The connecting part 212 is cylindrical or has an externally threaded rod-like structure, extending axially from the rear end of the anti-rotation part 211 and passing through the connecting hole 103 into the receiving hole 104. This design allows the connecting part 212 to maintain axial freedom while avoiding unnecessary friction or interference with the inner wall of the handle sleeve 100.

[0046] The receiving hole 104 is located at the end of the handle sleeve 100 away from the blade body 200, and its inner diameter is larger than that of the connecting hole 103. It is used to accommodate the front end of the counterweight connector 300. The front end of the counterweight connector 300 is provided with a connection structure corresponding to the connecting sub-part 212, such as an internal threaded hole, a snap-fit ​​groove, or an elastic locking mechanism, which can achieve a detachable connection with the connecting sub-part 212. When the counterweight connector 300 is screwed in or snapped into place, its front end is located inside the receiving hole 104 and locked with the connecting sub-part 212, while its rear end extends out of the receiving hole 104.

[0047] A portion of the counterweight connector 300 is located inside the receiving hole 104 and is detachably connected to the connector sub-part 212, while another portion of the counterweight connector 300 is located outside the receiving hole 104 and together with the blade body 200 clamps the handle sleeve 100.

[0048] When the counterweight connector 300 is in the tightened state, its rear end face and the tail end of the blade 200 abut against the two ends of the handle sleeve 100, respectively, jointly applying an axial clamping force to the handle sleeve 100. This clamping force firmly fixes the handle sleeve 100 between the blade 200 and the counterweight connector 300, preventing loosening or detachment even under high-intensity chopping or torsional conditions. Furthermore, the counterweight connector 300 itself can be made of materials of different densities or volumes, allowing users to adjust the weight distribution and grip feel of the entire knife by replacing different specifications of the counterweight connector 300.

[0049] In some embodiments, the handle sleeve 100 includes a plurality of first handle portions 110, second handle portions 120 and third handle portions 130 connected in sequence. The three handle portions are stably spliced ​​together by means of threaded connection, snap-fit, interference fit, magnetic structure or integral molding, etc., to form a whole continuous gripping body, which is convenient for disassembly, replacement or cleaning.

[0050] The first handle portion 110 is provided with an anti-rotation hole 102. The first handle portion 110 is located at the end of the handle sleeve 100 near the blade body 200, and the anti-rotation hole 102 is provided inside. The cross-section of the anti-rotation hole 102 is a non-circular structure, such as hexagonal, rectangular, D-shaped, or an irregular contour with positioning ribs, which is used to form a circumferential limiting fit with the anti-rotation portion 211 in the blade body connecting portion 210. This design effectively prevents the blade body 200 from rotating relative to the handle during the cutting process, ensuring stable and reliable torque transmission.

[0051] The second handle portion 120 is provided with a connecting hole 103. The second handle portion 120 is connected between the first handle portion 110 and the third handle portion 130, and its interior is provided with a connecting hole 103. The connecting hole 103 is a cylindrical through hole with an inner diameter slightly larger than the outer diameter of the connecting sub-part 212, allowing the connecting sub-part 212 to pass through it without interference. The two ends of the second handle portion 120 are respectively tightly fitted to the first handle portion 110 and the third handle portion 130. In the assembled state, the front end of the second handle portion 120 abuts against the rear end face of the anti-rotor portion 211, and the rear end abuts against the front end face of the counterweight connector 300, thereby forming a stable support structure in the axial direction.

[0052] The third handle portion 130 is provided with a receiving hole 104, and the second handle portion 120 abuts between the anti-rotor portion 211 and the counterweight connector 300. The third handle portion 130 is located at the end of the handle sleeve 100 away from the blade body 200, and the receiving hole 104 is formed inside. The diameter of the receiving hole 104 is larger than that of the connecting hole 103, providing sufficient installation space for the front end of the counterweight connector 300. After the front end of the counterweight connector 300 is inserted into the receiving hole 104, it is detachably connected to the connecting sub-portion 212 passing through the connecting hole 103, for example, by thread engagement, elastic buckle, or quick-release locking mechanism.

[0053] After the entire blade is assembled, the anti-rotor portion 211 of the blade body 200 is fully embedded in the anti-rotation hole 102 of the first handle portion 110. The connecting portion 212 passes through the connecting hole 103 of the second handle portion 120 and extends into the receiving hole 104 of the third handle portion 130, locking with the counterweight connecting member 300. At this time, the second handle portion 120 is clamped between the anti-rotor portion 211 and the counterweight connecting member 300, not only serving as a structural transition but also bearing part of the axial load transmission function, thus enhancing the overall rigidity.

[0054] In some embodiments, the counterweight connector 300 is threaded to the connector sub-part 212. The counterweight connector 300 and the connector sub-part 212 are detachably fixed by a threaded connection. This connection structure features easy assembly, reliable locking, and excellent repeated assembly and disassembly performance, meeting the actual needs of users who frequently change handles or adjust counterweights.

[0055] The connecting part 212 is a cylindrical rod extending axially from the rear end of the anti-rotor part 211, and its outer circumferential surface is machined with external threads. The tooth profile of the external thread can be a standard metric thread, a fine thread, or a self-tapping thread, and the specific specifications are determined according to the size of the replaceable handle and the kitchen knife 10 with adjustable weight and the force requirements. The thread length is sufficient to ensure a sufficient engagement depth with the counterweight connecting part 300, so as to maintain connection stability when subjected to lateral impact or torsional torque.

[0056] The counterweight connector 300 has an internally threaded hole that matches the external thread of the connector 212. The internally threaded hole extends through the front end of the counterweight connector 300 along its axial direction and is aligned with the receiving hole 104. When the counterweight connector 300 is screwed into the connector 212, its front end gradually enters the receiving hole 104 of the handle sleeve 100 until the end face of the counterweight connector 300 abuts against the inner wall of the third handle portion 130 or the rear end face of the second handle portion 120, thus forming an axial limit.

[0057] During tightening, the counterweight connector 300 and the blade body 200 apply clamping force synchronously from both ends of the handle sleeve 100. This clamping force ensures a tight fit between the first handle section 110, the second handle section 120, and the third handle section 130, preventing relative displacement or abnormal noise between the sections during use. Simultaneously, the preload provided by the threaded connection ensures that the entire replaceable handle and the adjustable weight kitchen knife 10 structure maintain overall rigidity during high-intensity chopping, splitting, or fine cutting operations, preventing loosening or failure.

[0058] To change the handle's appearance, clean the internal structure, or adjust the weight of the replaceable handle and the adjustable weight kitchen knife 10, users only need to use a general-purpose tool (such as an Allen wrench or screwdriver) to apply pressure to the disassembly interface 321 at the end of the counterweight connector 300 and rotate it counterclockwise to disengage the threaded connection, achieving quick disassembly. For reinstallation, simply tighten the counterweight connector 300 clockwise to the appropriate torque to restore the full functionality of the replaceable handle and the adjustable weight kitchen knife 10.

[0059] In some embodiments, the cross-sectional area of ​​the anti-rotor portion 211 gradually decreases from the cutter body 200 toward the connecting portion 212. The anti-rotor portion 211 adopts a tapered cross-section design, with its cross-sectional area gradually decreasing from the cutter body 200 toward the connecting portion 212. This structure forms a smoothly transitioning conical or stepped conical profile, which retains sufficient torsional strength while effectively guiding alignment and insertion during assembly.

[0060] An anti-rotor section 211 extends directly from the tail end of the blade body 200. The starting end of the anti-rotor section 211 has the same width or thickness as the blade body 200, ensuring that torque is efficiently transmitted from the blade body 200 to the handle sleeve 100. As the anti-rotor section 211 extends rearward, its cross-sectional profile continuously tapers axially, eventually smoothly transitioning to the cylindrical body of the connecting sub-section 212. This gradient design avoids the risk of cracks or breakage in stress concentration areas of traditional right-angle step structures, significantly improving the structural reliability of the replaceable handle and adjustable weight kitchen knife 10 under high-intensity use.

[0061] The anti-rotation hole 102 in the handle sleeve 100 precisely matches the shape of the anti-rotor part 211, and is also tapered in shape. When the anti-rotor part 211 is inserted into the anti-rotation hole 102, a circumferential limiting fit is formed between the two, preventing the blade body 200 from rotating relative to the handle sleeve 100. At the same time, the tapered structure plays an automatic guiding role during assembly, reducing the alignment difficulty for users during installation and improving the operating experience.

[0062] As the cross-sectional area of ​​the anti-rotation section 211 gradually decreases, the contact area between its outer contour and the inner wall of the anti-rotation hole 102 is more evenly distributed, which helps to disperse local pressure and reduce material wear. Especially after frequent disassembly or long-term use, this design can still maintain good anti-rotation performance and structural stability.

[0063] In some embodiments, the outer contour of the cross-sectional area of ​​the anti-rotation part 211 and the outer contour of the cross-sectional area of ​​the anti-rotation hole 102 are non-circular. The anti-rotation part 211 has a non-circular outer contour, and the corresponding anti-rotation hole 102 in the handle sleeve 100 also adopts a matching non-circular inner contour. This mating structure effectively restricts the relative rotation between the blade body 200 and the handle sleeve 100, ensuring stable and reliable torque transmission during cutting, chopping, or twisting operations.

[0064] Common non-circular contours include polygons, ellipses, D-shapes, triangles, circles with flattened sections, stars, or irregular cross-sections with a combination of protrusions and grooves. For example, the anti-rotation part 211 can have a hexagonal cross-section, and the anti-rotation hole 102 can be machined into a corresponding hexagonal through hole; or the anti-rotation part 211 can have a flat surface on one side, while the rest remains rounded, forming a D-shaped structure, with a corresponding flat surface simultaneously provided on the inner wall of the anti-rotation hole 102 to achieve circumferential limiting. This type of design ensures smooth assembly while completely eliminating rotational degrees of freedom.

[0065] Compared to traditional cylindrical structures with pins or keyways, non-circular mating structures offer higher structural integration and manufacturing efficiency. They eliminate the need for additional anti-rotation pins, locating keys, or adhesive fasteners, simplifying assembly and reducing production costs. Furthermore, the anti-rotation function is achieved by the main structure itself, preventing safety hazards caused by loose or detached additional parts.

[0066] In actual use, when the blade body 200 is subjected to lateral shearing force or torque, the edge or plane of the anti-rotation part 211 will be in close contact with the corresponding inner wall of the anti-rotation hole 102, and the force will be evenly transmitted to the entire handle sleeve 100. This surface contact or line contact method can better disperse stress than point contact, reduce local wear, and extend the service life of the replaceable handle and the adjustable weight kitchen knife 10.

[0067] Furthermore, the non-circular profile naturally prevents mis-assembly. When replacing the handle or reassembling the kitchen knife 10 with a replaceable handle and adjustable weight, the anti-rotation part 211 can only be inserted smoothly when it is fully aligned with the anti-rotation hole 102. This feature effectively prevents structural failure or usage risks caused by mis-assembly, improving the product's safety and ease of use.

[0068] In some embodiments, the counterweight connector 300 includes a first counterweight part 310 and a second counterweight part 320 connected to each other. The counterweight connector 300 adopts a split-integrated structure, consisting of the first counterweight part 310 and the second counterweight part 320 fixedly connected. The two counterweight parts have a clear division of functions and work together structurally to achieve multiple objectives of connection, clamping, and counterweight adjustment.

[0069] The first counterweight 310 is located within the receiving hole 104 and threadedly connected to the connecting sub-part 212. Specifically, the first counterweight 310 is located inside the receiving hole 104 of the handle sleeve 100, and its front end has an internal threaded hole that matches the external thread of the connecting sub-part 212. Through a screw-on engagement, the first counterweight 310 and the connecting sub-part 212 form a secure threaded connection. This connection not only provides axial locking but also serves as a reference positioning point for the entire tool assembly, ensuring that all components fit tightly together in a coaxial state.

[0070] The second counterweight 320 is located outside the receiving hole 104 and together with the blade body 200 clamps the handle sleeve 100. The second counterweight 320 is connected to the rear end of the first counterweight 310 and protrudes entirely outside the receiving hole 104. The outer diameter of the second counterweight 320 is larger than the diameter of the receiving hole 104, allowing its end face to abut against the tail end of the handle sleeve 100. After the counterweight connector 300 is fully tightened, the second counterweight 320 and the blade body 200 apply axial pressure from both ends of the handle sleeve 100, firmly clamping the first handle section 110, the second handle section 120, and the third handle section 130 in the middle, preventing loosening or displacement of the handle sections during use.

[0071] The second counterweight 320 has a disassembly interface 321 on the side opposite to the first counterweight 310. This disassembly interface 321 has a standardized structure, such as a hexagonal recess, Phillips head slot, slotted head, square hole, or magnetic quick-release recess. Users can use general-purpose tools or dedicated disassembly devices to apply rotational torque to the counterweight connector 300 through this interface, thereby achieving quick installation or disassembly. This design significantly improves maintenance convenience and allows users to flexibly replace counterweight connectors 300 of different weights or materials according to usage scenarios.

[0072] The first counterweight 310 and the second counterweight 320 can be made of materials with the same or different densities. For example, the first counterweight 310 can be made of stainless steel to ensure thread strength, while the second counterweight 320 can be made of tungsten alloy or brass to increase local mass, thereby precisely controlling the overall center of gravity of the replaceable handle and the weight-adjustable kitchen knife 10. This modular counterweight strategy allows the same knife body 200 to adapt to various operating feel requirements, such as lightweight, standard, or heavyweight.

[0073] In some embodiments, the diameter of the connecting hole 103 is smaller than the diameter of the anti-rotation hole 102 and the diameter of the receiving hole 104. The handle sleeve 100 has the anti-rotation hole 102, the connecting hole 103, and the receiving hole 104 arranged sequentially along the axial direction, wherein the diameter of the connecting hole 103 is smaller than the diameter of the anti-rotation hole 102 and also smaller than the diameter of the receiving hole 104. This dimensional relationship forms a stepped internal cavity structure, providing precise positioning and effective isolation for the various functional components of the replaceable handle and the weight-adjustable kitchen knife 10.

[0074] The anti-rotation hole 102 is located at the end of the handle sleeve 100 near the cutter body 200, and its larger diameter is used to accommodate the anti-rotation part 211 with a larger cross-sectional area. The anti-rotation part 211 typically adopts a non-circular profile design, requiring sufficient space to achieve the circumferential limiting function. The larger diameter ensures that the anti-rotation part 211 can be smoothly inserted and make full contact with the hole wall when force is applied, transmitting torque without slippage.

[0075] The receiving hole 104 is located at the end of the handle sleeve 100 away from the blade body 200. Its diameter is also larger than that of the connecting hole 103. It is mainly used to accommodate the first counterweight part 310 of the counterweight connector 300. The larger receiving hole 104 provides ample installation space for the counterweight connector 300, and at the same time facilitates users to replace counterweight parts with different outer diameters or shapes, thereby improving product compatibility and personalized adaptation capabilities.

[0076] The connecting hole 103 is located between the anti-rotation hole 102 and the receiving hole 104. Its diameter is minimal, allowing only the connecting part 212 to pass through. The connecting part 212 is a slender cylindrical structure with an outer diameter slightly smaller than the inner diameter of the connecting hole 103, forming a clearance fit. This design, on the one hand, restricts the forward movement of the anti-rotation part 211, and on the other hand, prevents the counterweight connector 300 from extending excessively inward, thus naturally limiting the movement of critical components in the axial direction.

[0077] The stepped aperture layout also brings several technical advantages. First, the small aperture of the connecting hole 103 forms a "neck" in the structure, which enhances the rigidity of the middle part of the handle sleeve 100 and helps resist lateral bending deformation. Second, this neck structure can serve as a visual or tactile alignment reference during the assembly process, improving the accuracy of user self-assembly. Finally, the stepped surfaces between different apertures can serve as end face support references for the second handle part 120, ensuring that the three-section handle fits tightly and does not wobble when clamped.

[0078] In some embodiments, the blade connecting part 210, the handle sleeve 100, and the counterweight connecting part 300 are coaxially arranged. Specifically, the blade connecting part 210, the handle sleeve 100, and the counterweight connecting part 300 remain coaxial in the assembled state, sharing a common central axis. This coaxial layout is a key design feature that ensures the overall structural balance, even force distribution, and stable operation of the replaceable handle and the weight-adjustable kitchen knife 10.

[0079] The blade connecting part 210 extends longitudinally from the tail end of the blade 200 along the replaceable handle and the kitchen knife 10 with adjustable weight, and its geometric center line coincides with the center line of the blade edge of the blade 200. The handle sleeve 100 is a hollow cylindrical structure, and the internal accommodating space 101 forms a through-center channel along its length, the axis of which is strictly aligned with the extending direction of the blade connecting part 210. The counterweight connector 300 is inserted from the tail end of the handle sleeve 100 and is mated and locked with the blade connecting part 210 along the same axis, thereby integrating the entire assembly into a coaxial whole.

[0080] The coaxial design effectively avoids torque imbalance caused by component eccentricity. During cutting, chopping, or rapid swinging, the force is transmitted along the central axis through the blade body 200 to the handle sleeve 100 and the counterweight connector 300, without generating additional bending moments or torsional vibrations. The user experiences a stable center of gravity and precise steering, significantly improving operating comfort and work efficiency.

[0081] Furthermore, the coaxial structure simplifies the assembly process. All components are machined using the same reference axis during manufacturing, ensuring precise fit between the anti-rotor part 211 and the anti-rotation hole 102, the connecting part 212 and the connecting hole 103, and the counterweight connector 300 and the receiving hole 104. When replacing the handle or counterweight connector 300, the user only needs to push it in axially and tighten it for automatic alignment, without requiring additional angle or position adjustments.

[0082] In some embodiments, there are multiple counterweight connectors 300, and the weights of the multiple counterweight connectors 300 are different. Any counterweight connector 300 can cooperate with the handle sleeve 100 and the blade body 200.

[0083] The kitchen knife 10 with replaceable handles and adjustable weight is equipped with multiple counterweight connectors 300. Each counterweight connector 300 has the same external dimensions and interface specifications, but differs in overall weight. For example, the counterweight connectors 300 can be designed as lightweight (e.g., 40 grams), standard (e.g., 80 grams), and heavy-duty (e.g., 100 grams), differentiated by using materials of different densities (e.g., aluminum alloy, stainless steel, brass, or tungsten alloy) or adjusting the internal structural volume. All counterweight connectors 300 can be reliably assembled with handle sleeves 100 and knife bodies 200 of the same specifications.

[0084] During use, users can freely choose the appropriate counterweight connector 300 based on the type of food, operating habits, or usage scenario. For example, when handling hard foods such as frozen meat or bone-in poultry, the heavy-duty counterweight connector 300 can be installed to enhance chopping inertia; when performing fine slicing or prolonged operations, the lightweight counterweight connector 300 can be used to reduce wrist strain. This on-demand adjustment mechanism significantly improves the adaptability and ergonomics of the kitchen knife 10 with its replaceable handle and adjustable weight.

[0085] The kitchen knife 10 with replaceable handles and adjustable weight can also be provided with a dedicated storage box or display rack, which has independent slots inside for storing counterweight connectors 300 of different weights and replaceable handle sleeves 100. This design not only enhances the overall aesthetics of the product, but also makes it easier for users to quickly identify and access the required components.

[0086] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0087] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A kitchen knife with a replaceable handle and adjustable weight, characterized in that, include: A handle sleeve is provided with a receiving space, which extends through the handle sleeve along the axial direction of the handle sleeve; The blade body includes a blade body connecting portion, which is disposed within the receiving space; and A counterweight connector is partially disposed within the accommodating space. The counterweight connector is detachably connected to the blade body connecting part and together with the blade body clamps the handle sleeve. The end of the counterweight connector opposite to the blade body is provided with a disassembly interface for connecting to an external disassembly tool.

2. The kitchen knife with a replaceable handle and adjustable weight according to claim 1, characterized in that, The blade body connecting part includes an anti-rotor part and a connecting sub-part, wherein the anti-rotor part is connected between the blade body and the connecting sub-part; The handle sleeve is provided with an anti-rotation hole, a connecting hole and a receiving hole connected in sequence along its axial direction. The anti-rotation part is disposed in the anti-rotation hole, the connecting part passes through the connecting hole, a part of the counterweight connecting member is located in the receiving hole and is detachably connected to the connecting part, and the other part of the counterweight connecting member is located outside the receiving hole and together with the blade body clamps the handle sleeve.

3. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The handle sleeve includes a plurality of first handle portions, second handle portions and third handle portions connected in sequence. The first handle portion is provided with the anti-rotation hole, the second handle portion is provided with the communication hole, and the third handle portion is provided with the receiving hole. The second handle portion abuts between the anti-rotation portion and the counterweight connector.

4. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The counterweight connector is threadedly connected to the connector sub-part.

5. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The cross-sectional area of ​​the anti-rotor portion gradually decreases from the direction of the blade body toward the connecting part.

6. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The outer contour of the cross-sectional area of ​​the anti-rotation part and the outer contour of the cross-sectional area of ​​the anti-rotation hole are non-circular.

7. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The counterweight connector includes a first counterweight part and a second counterweight part connected to each other. The first counterweight part is located inside the receiving hole and is threaded to the connecting sub-part. The second counterweight part is located outside the receiving hole and together with the blade body clamps the handle sleeve. The second counterweight part has the disassembly interface on the side opposite to the first counterweight part.

8. The kitchen knife with a replaceable handle and adjustable weight according to claim 2, characterized in that, The diameter of the connecting hole is smaller than the diameter of the anti-rotation hole and the diameter of the receiving hole.

9. The kitchen knife with a replaceable handle and adjustable weight according to claim 1, characterized in that, The blade connecting part, the handle sleeve, and the counterweight connecting part are coaxially arranged.

10. The kitchen knife with a replaceable handle and adjustable weight according to claim 1, characterized in that, The number of counterweight connectors is multiple, and the weights of the multiple counterweight connectors are different. Each of the counterweight connectors can cooperate with the handle sleeve and the blade body.

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