Folding knife

Abstract

The utility model relates to the technical field of cutter manufacturing, and discloses a folding cutter. A guide groove is formed in the cutter handle and comprises an arc section and two limiting sections, the two ends of the arc section are connected with the limiting sections, the circle center of the arc section is the rotating center of the cutter handle and the cutter head, and an included angle is formed between the extending direction of the limiting sections and the tangential direction of the arc section. The tool bit comprises a tool bit body, a guide piece and an elastic piece, a first long-strip hole is formed in the tool bit body, the first connecting piece is arranged in the first long-strip hole in a sliding mode, the guide piece is fixedly arranged at the end, in the extending direction of the first long-strip hole, of the tool bit body, the guide piece is in sliding fit with the guide groove, and the elastic piece is elastically connected with the first connecting piece. According to the folding knife, the first connecting piece is driven to slide in the direction away from the guiding piece, so that the folding knife can limit the knife head through a simple structure, the limiting device is arranged in the folding knife, the chance that the limiting part is abraded is greatly reduced, and the safety of the folding knife is improved.

Description

Technical Field

[0001] This utility model relates to the field of knife manufacturing technology, and in particular to a folding knife. Background Technology

[0002] Folding knives have blades that can be folded and stored inside the handle. Compared to fixed blades, they take up significantly less space when not in use, making them easier to carry and store. They also usually do not require an additional sheath, which is why folding knives are becoming increasingly popular.

[0003] like Figure 1 As shown, some folding knives currently have a limiting member 9 mounted on the handle 1. When the folding knife is in the retracted state, the blade 2 is retracted into the handle 1 and abuts against the limiting member 9. When the folding knife is in the unfolded state, the blade 2 is rotated out of the handle 1 to its maximum limit and abuts against the limiting member 9 to achieve the unfolded state of the folding knife. However, placing the limiting member 9 on the handle 1 makes the structure of the handle 1 more complex, affecting cleaning and maintenance. At the same time, when performing some powerful cutting or piercing actions, the blade 2 will generate a large impact force on the limiting member 9, making the limiting member 9 very easy to wear. This will not only affect the function of the limiting member 9, but may also damage the entire structure of the folding knife, affecting its safety.

[0004] Therefore, there is an urgent need for a folding knife that can solve the problem of unstable limiting function, achieve a simple limiting structure, efficient limiting function, and improve the safety of the folding knife. Utility Model Content

[0005] The purpose of this invention is to provide a folding knife that can solve the problem of unstable limiting function, achieve a simple limiting structure, efficient limiting function, and improve the safety of the folding knife.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A folding knife includes a handle, a blade, and a first connector, the first connector being rotatably connected to the handle and the blade to allow the blade to switch between a retracted state and an unfolded state.

[0008] The tool holder is provided with a guide groove, which includes an arc segment and two limiting segments. Both ends of the arc segment are connected to the limiting segments. The center of the arc segment is the rotation center of the tool holder and the tool head. The extension direction of the limiting segments forms an angle with the tangent direction of the arc segment.

[0009] The cutter head includes a cutter head body, a guide member, and an elastic member. The cutter head body has a first elongated hole, and a first connecting member is slidably disposed in the first elongated hole. The guide member is fixedly disposed at one end of the cutter head body in the extension direction of the first elongated hole. The guide member is slidably engaged with the guide groove. The elastic member is elastically connected to the first connecting member to drive the first connecting member to slide away from the guide member.

[0010] As an alternative to the folding knife, the limiting segment extends radially outward from the arc segment.

[0011] As an alternative to the folding knife, the elastic element is disposed within the first elongated hole.

[0012] As an alternative to this folding knife, the handle is provided with a receiving groove for accommodating the blade head when it is in the folded state;

[0013] Along the thickness direction of the cutter head, the guide member is protruding on both opposite sides of the cutter head, and the guide groove is correspondingly provided on both opposite side walls of the receiving groove.

[0014] As an alternative to this folding knife, the handle includes:

[0015] Two knife handle bodies;

[0016] A first fastener connects the two tool holder bodies and sets the two tool holder bodies apart to form the receiving groove.

[0017] As an alternative to the folding knife, the handle also includes a housing, which is provided on the outer wall of each handle body.

[0018] As an alternative to the folding knife, the first fastener includes a first nut, a limiting block, and a second nut. The limiting block is disposed between the two knife handle bodies, and both the first nut and the second nut are threadedly connected to the limiting block.

[0019] As an alternative to the folding knife, the folding knife also includes a clamp that is connected to the handle.

[0020] As an alternative to this folding knife, the blade head includes a first rotating part, the handle includes a second rotating part, the first connector rotatably connects the first rotating part and the second rotating part, and a gasket is provided between the first rotating part and the second rotating part.

[0021] As an alternative to this folding knife, an auxiliary force-applying component is provided on the blade body, and the auxiliary force-applying component is located on the outside of the handle.

[0022] The beneficial effects of this utility model are as follows:

[0023] This utility model proposes a folding knife with a guide groove on the handle. The guide groove includes an arc segment and two limiting segments. Both ends of the arc segment are connected to the limiting segments. The center of the arc segment is the rotation center of the handle and the blade head. The extension direction of the limiting segments forms an angle with the tangent direction of the arc segment. The blade head includes a blade head body, a guide member, and an elastic member. The blade head body has a first elongated hole. A first connecting member is slidably disposed in the first elongated hole. A guide member is fixedly disposed on one end of the blade head body in the extension direction of the first elongated hole. The guide member slides in cooperation with the guide groove. The elastic member elastically connects the first connecting member and the guide member to drive the first connecting member to slide away from the guide member. This allows the folding knife to limit the blade head with a simple structure. Since the limiting device is located inside the folding knife, the chance of wear on the limiting part is greatly reduced, improving the safety of the folding knife. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first structure of the folding knife provided in the background art of this utility model;

[0025] Figure 2 This is an exploded view of the folding knife provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the first structure of the folding knife provided in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the second structure of the folding knife provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the third structure of the folding knife provided in this embodiment of the utility model.

[0029] In the picture:

[0030] 1. Handle; 11. Handle body; 111. Guide groove; 1111. Arc segment; 1112. Limiting segment; 1112a. Unfolding limiting segment; 1112b. Retracting limiting segment; 12. Outer shell;

[0031] 2. Cutting head; 21. Cutting head body; 211. First elongated hole; 22. Guide component; 23. Elastic component; 24. Auxiliary force application component;

[0032] 3. First connecting component; 31. First rotating shaft; 32. Second rotating shaft;

[0033] 4. Limiting component; 5. Washer; 6. Clamping component; 7. First fastener; 71. First nut; 72. Limiting block; 73. Second nut; 8. Second fastener. Detailed Implementation

[0034] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effects achieved clearer, the technical solution of this invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this invention and are not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts related to this invention are shown in the accompanying drawings, not all of them.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 2As shown, this embodiment provides a folding knife that can be used in outdoor, daily life, and industrial fields for cutting items. The folding knife includes a handle 1, a blade 2, and a first connecting member 3. The first connecting member 3 rotatably connects the handle 1 and the blade 2, allowing the blade 2 to switch between a retracted state and an unfolded state. The handle 1 is provided with a guide groove 111, which includes an arc segment 1111 and two limiting segments 1112. Both ends of the arc segment 1111 are connected to the limiting segments 1112. The center of the arc segment 1111 is the rotation center of the handle 1 and the blade 2. The extension direction of the limiting segments 1112 forms an angle with the tangent direction of the arc segment 1111. The blade head 2 includes a blade head body 21, a guide member 22, and an elastic member 23. The blade head body 21 has a first elongated hole 211. A first connecting member 3 is slidably disposed in the first elongated hole 211. A guide member 22 is fixedly disposed at one end of the blade head body 21 along the extension direction of the first elongated hole 211. The guide member 22 slidably engages with a guide groove 111. The elastic member 23 elastically connects the first connecting member 3 and the guide member 22, driving the first connecting member 3 to slide away from the guide member 22. This allows the folding knife to limit the blade head 2 with a simple structure. Because the limiting device is located inside the folding knife, the chance of wear on the limiting part is greatly reduced, improving the safety of the folding knife. In this embodiment, as... Figure 2 , Figure 3 and Figure 5 As shown, the two limiting sections at both ends of the arc segment 1111 are the unfolding limiting section 1112a and the folding limiting section 1112b, respectively. When the cutter head 2 is in the unfolded state, the guide member 22 is located at the unfolding limiting section 1112a, and the elastic member 23 abuts against the first elongated hole 211 and the first connecting member 3, respectively. The elastic member 23 is compressed and provides elastic force to its output end, so that the guide member 22 can be more stably limited in the unfolding limiting section 1112a. When the cutter head 2 changes from the unfolded state to the retracted state, the guide member 22 slides within the arc segment 1111. When the guide member 22 is within the arc segment 1111, the straight-line distance between the guide member 22 and the first connecting member 3 is shorter than the straight-line distance when the guide member 22 is in the limiting segment 1112. This results in the elastic member 23 being compressed to a larger size than in the unfolded state, thereby storing more elastic potential energy. When the guide member 22 slides to the retracted state, that is, when the guide member 22 slides to the retracted limiting segment 1112b, the elastic potential energy accumulated by the guide member 22 from the unfolded limiting segment 1112a to the arc segment 1111 is released, allowing the guide member 22 to be stably limited in the retracted limiting segment 1112b.

[0040] Specifically, such as Figure 2 , Figure 3 and Figure 5As shown, in this embodiment, the limiting segment 1112 extends radially outward from the arc segment 1111, thus more effectively limiting the displacement of the guide member 22 on the plane of the guide groove 111. When the folding knife is subjected to cutting force, the guide member 22 can be more efficiently limited in the limiting segment 1112, thereby preventing the guide member 22 from easily deviating from the guide groove 111, and ensuring the stability of the movement trajectory of the cutter head 2.

[0041] In this embodiment, as Figures 2-5 As shown, with the blade head 2 extended, the direction from the blade edge to the back of the blade is considered the front, the direction from the back of the blade to the blade edge is considered the rear, the direction from the blade head 2 to the handle 1 is considered the left, and the direction from the handle 1 to the blade head 2 is considered the right.

[0042] Specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, in this embodiment, the unfolding limiting segment 1112a is located on the right front side of the first connecting member 3, and the retracting limiting segment 1112b is located on the left rear side of the arc segment 1111. The central angle of the arc segment 1111 is 180 degrees, and the line connecting the two ends of the arc segment 1111 forms an angle with the extension direction of the handle 1. This allows the blade head 2 to be more stably limited in the limiting segment 1112, and the arc segment 1111 can also better cooperate with the guide member 22, the elastic member 23, and the first connecting member 3 for sliding. In other embodiments, the specific structural settings of the guide groove 111 and the first elongated hole 211 can be any other form and other angles, as long as it can enable the folding knife to work stably from the unfolded state to the retracted state, and enable the blade head 2 to rotate stably during the process from the unfolded state to the retracted state.

[0043] Preferably, such as Figures 2-5 As shown, in this embodiment, the elastic element 23 is disposed in the first elongated hole 211. Compared with placing the elastic element 23 arbitrarily outside the device or in other undefined spaces, this method makes the structure of the entire device more compact. By placing the elastic element 23 in the first elongated hole 211, this specific space can be effectively utilized. The elastic element 23 will not occupy additional surrounding space when placed there, which helps to reduce the overall volume of the fixture and make it easier to operate in a limited working space.

[0044] Optionally, such as Figures 2-5As shown, in this embodiment, the elastic element 23 is a spring. The shape of the first elongated hole 211 is generally relatively long and narrow, which naturally matches the slender shape of the spring. This allows for full utilization of the space within the hole, avoiding space waste caused by the mismatch between the shape of the elastic element 23 and the installation space, making the overall structure more compact. The spring has good elastic properties and can continuously provide stable and predictable elastic force within a certain deformation range, providing reliable support or buffering for the rotation and limiting of the folding knife, ensuring the normal use of the folding knife. In other embodiments, the elastic element 23 can also be other structures. For example, the elastic element 23 can be a silicone block or a rubber block, etc., which will not be described in detail further.

[0045] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, the handle 1 is provided with a receiving groove for accommodating the folded blade head 2. The presence of the receiving groove allows the folded blade head 2 to be neatly stored inside the handle 1, making the overall structure of the folding knife more compact. This is very advantageous for situations where a folding knife needs to be carried around. In daily use, the folding knife can be conveniently placed in a pocket, wallet, or small tool bag without taking up too much space or causing inconvenience due to the protruding blade head 2. The receiving groove provides a relatively enclosed protective space for the blade head 2. In the event of collision, squeezing, or dropping, the blade head 2 is surrounded by the wall of the receiving groove, which can reduce the direct impact of external forces on the blade head 2 and reduce the probability of damage to the blade head 2.

[0046] Specifically, such as Figure 2 and Figure 5As shown, in this embodiment, guide members 22 are protruding on both sides of the blade head 2 along the thickness direction, and guide grooves 111 are correspondingly provided on both sides of the receiving groove. When the blade head 2 is folded and stored in the receiving groove, the guide members 22 on both sides cooperate with the guide grooves 111 to more accurately guide the blade head 2 into the receiving groove. The guide members 22 slide within the guide grooves 111 to ensure that the blade head 2 accurately reaches the predetermined position each time it is folded. In some high-end folding knives, this precise guidance can ensure that the blade edge of the blade head 2 is exactly in the receiving groove after folding, avoiding the blade edge being exposed and causing safety hazards. After the blade head 2 is stored in the receiving groove, the cooperation between the guide members 22 and the guide grooves 111 can prevent the blade head 2 from shaking or accidentally popping out within the receiving groove. Due to the certain friction and limiting effect between the guide members 22 and the guide grooves 111, even if the folding knife is subjected to a certain degree of external impact or vibration, the blade head 2 can still be stably kept in the folded state. This is crucial for situations where a folding knife needs to be carried and used in complex environments, effectively preventing dangers caused by a loose blade head 2. Simultaneously, guide members 22 protrude from both opposite sides of the blade head 2. If one guide member 22 on one side of the blade head 2 is damaged or malfunctions, the other side of the blade head 2 can still engage with the guide groove 111, allowing for normal storage and unfolding of the blade head 2.

[0047] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, the handle 1 includes two handle bodies 11 and a first fastener 7. The first fastener 7 connects the two handle bodies 11 and sets them apart to form a receiving groove. When the folding knife is subjected to external impact, the structure formed by the connection of the two handle bodies 11 through the first fastener 7 can better disperse the impact force. Compared with a single handle 1, this structure can distribute the external force through the connection between the two handle bodies 11 and the first fastener 7, reducing the direct impact on the blade head 2 and the internal components of the receiving groove. In the event of an accidental drop, this structure can reduce the risk of damage to the blade head 2 within the receiving groove. The structure of the receiving groove formed by the connection of the two handle bodies 11 through the first fastener 7 allows for convenient installation of other components related to the blade head 2 into the receiving groove during the manufacturing process. If these internal components malfunction or need to be replaced during use, this structure also facilitates the disassembly of the handle 1 for repair or replacement by maintenance personnel.

[0048] More specifically, such as Figures 2-5As shown, in this embodiment, the first connecting member 3 is fixedly connected to the handle body 11, and the first connecting member 3 passes sequentially through one of the two handle bodies 11, the blade head 2, and the other handle body 11, thereby connecting the handle body 11 and the blade head 2, and allowing the handle body 11 to store the blade head 2. The blade head 2 has a first elongated hole 211, through which the first connecting member 3 passes, connecting the handle body 11 and the blade head 2. Furthermore, when the blade head 2 and the handle body 11 rotate relative to each other, the first connecting member 3 can slide relative to each other within the first elongated hole 211, ensuring that the blade head 2 can switch more smoothly between the stored and unfolded states.

[0049] Specifically, such as Figure 2 As shown in this embodiment, each handle body 11 is provided with a shell 12 on its outer wall. The shell 12 can provide good protection for the handle body 11. The handle 1 may be subjected to various external impacts. The shell 12 can absorb and disperse these impacts, reducing the damage to the handle body 11.

[0050] Optionally, in this embodiment, the outer shell 12 is perforated. The perforated outer shell 12 effectively reduces the weight of the handle 1. For situations requiring prolonged carrying of the folding knife, a lighter folding knife makes the user feel more comfortable. The perforated outer shell 12 allows water to directly pass through it and contact the outer wall of the handle body 11 when cleaning the folding knife. When rinsing the folding knife, water can easily pass through the perforated portion to wash away impurities adhering to the surface of the handle body 11 and the outer shell 12. For stubborn stains, the perforated design facilitates the use of cleaning tools such as brushes to reach deep into the outer shell 12 and directly contact the handle body 11 for cleaning. The brush bristles can reach the surface of the handle 1 through the perforated portion to remove stains. In other embodiments, the outer shell 12 can be of any design, as long as it protects the handle 1.

[0051] Preferably, such as Figure 2As shown, in this embodiment, countersunk holes are formed where the outer sides of the two outer shells 12 contact the first fastener 7. The first fastener 7 is located within the countersunk holes and abuts against the outer shells 12, avoiding the first fastener 7 occupying additional space on the outer sides of the outer shells 12. This makes the external contour of the product more regular and compact, reducing the overall size of the product, achieving miniaturization and lightweighting of the folding knife structure, improving space utilization, and providing more possibilities for the layout of other components or functions. Since the first fastener 7 is located within the countersunk holes and abuts against the outer shells 12, the possibility of its accidental movement or loosening is limited to a certain extent. This reduces the probability of the first fastener 7 being displaced or falling off due to accidental contact or unintentional external force, further ensuring the stability of the connection between the two outer shells 12, and reducing product failures or safety hazards caused by problems with the first fastener 7.

[0052] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, the first fastener 7 includes a first nut 71, a limiting block 72, and a second nut 73. The limiting block 72 is disposed between the two blade handle bodies 11. Both the first nut 71 and the second nut 73 are threadedly connected to the limiting block 72. This structure facilitates step-by-step operation during installation. First, the limiting block 72 is placed between the two blade handle bodies 11. Then, the first nut 71 and the second nut 73 can be installed and tightened from both sides respectively. This step-by-step installation method is more flexible in operation and easier to assemble the blade handle bodies 11 compared to some complex one-piece fasteners. The bidirectional tightening of the first nut 71 and the second nut 73 can prevent loosening between the blade handle bodies 11, ensuring the structural stability of the receiving groove, thereby ensuring the normal use and safe storage of the blade head 2. Through the synergistic effect of the first nut 71 and the second nut 73, the pressure applied by the limiting block 72 to the two blade handle bodies 11 is more even. This helps to reduce the situation of excessive local stress on the blade handle body 11 and avoid deformation or damage to the blade handle 1.

[0053] Specifically, such as Figure 2 As shown, in this embodiment, the folding knife also includes a clamping member 6 and a second fastener 8. The clamping member 6 and the handle 1 are connected by the second fastener 8. The design of the clamping member 6 makes the folding knife more convenient to carry. The folding knife can be securely clamped in a fixed position, making it easy to take out when needed, without having to stop what you're doing to search for it, unlike when it's in a backpack. When the folding knife is clamped in a fixed position by the clamping member 6, the risk of loss is greatly reduced compared to placing it in other places where it is easy to fall. Especially in some scenarios with a large range of activities or vigorous movements, this fixing method can ensure that the folding knife is always with the user, reducing the risk of loss.

[0054] Optionally, such as Figure 2As shown, in this embodiment, the clamping member 6 can be a pocket clip. The pocket clip holds the folding knife at the edge of the pocket, preventing the folding knife from directly contacting the inside of the pocket, thereby reducing wear and tear on the pocket. Without a pocket clip, the folding knife might cause holes in the pocket due to frequent friction. In other embodiments, the clamping member 6 can be other structures, as long as it can hold the folding knife in a fixed position.

[0055] Optionally, in this embodiment, the second fastener 8 can be a screw, which fixes the clamping member 6 to the handle 1, allowing the folding knife to be clamped in a fixed position, ensuring that the folding knife is always with the user and reducing the risk of loss. In other embodiments, the second fastener 8 can also be a pin or rivet, etc.

[0056] Specifically, such as Figures 2-5 As shown, in this embodiment, the blade head 2 includes a first rotating part, the handle 1 includes a second rotating part, and a first connecting member 3 rotatably connects the first rotating part and the second rotating part. A shim 5 is provided between the first rotating part and the second rotating part. The shim 5 between the first rotating part of the blade head 2 and the second rotating part of the handle 1 effectively buffers friction between them during rotation. During use, the first and second rotating parts of the folding knife frequently move relative to each other. Direct contact can easily cause wear. The shim 5 acts as a buffer layer. When using the folding knife, each unfolding and folding action of the blade head 2 reduces friction between the first and second rotating parts, lowering wear and extending the lifespan of the folding knife. The shim 5 also prevents noise caused by resonance between the first and second rotating parts. When the folding knife is subjected to external vibration or during high-speed rotation, resonance may occur between the components. The shim 5 acts as a buffer and damper, reducing resonance and further reducing noise.

[0057] Optionally, such as Figures 2-5 As shown, in this embodiment, the first connecting member 3 includes a first rotating shaft 31 and a second rotating shaft 32. The first rotating shaft 31 passes sequentially through one of the two outer shells 12, one of the two tool holder bodies 11, and the tool head 2. The second rotating shaft 32 passes sequentially through the other outer shell 12, the other tool holder body 11, and the tool head 2. The connecting portion of the first rotating shaft 31 is sleeved on the connecting portion of the second rotating shaft 32, and the first rotating shaft 31 and the second rotating shaft 32 are threaded together. Compared with some complex one-piece molding or welding processes, this assembly method is simple and clear, and the requirements for assembly equipment and worker skills are relatively low. When the tool head 2 is worn or the tool holder body 11 is damaged, the user can relatively easily disassemble the first rotating shaft 31 and the second rotating shaft 32 to replace the damaged parts. In other embodiments, the first connecting member 3 can be any other structure, as long as it can rotate and fix the tool head 2 and the tool holder 1, which will not be described in detail.

[0058] Specifically, such as Figures 2-5 As shown, an auxiliary force-applying component 24 protrudes from the blade body 21. Located on the outside of the handle 1, the auxiliary force-applying component 24 allows the operator to remove the blade 2 from the receiving slot by gripping the auxiliary force-applying component 24. Conversely, to place the blade 2 back into the receiving slot, the operator can push the auxiliary force-applying component 24 to retract the blade 2. This design provides the operator with a dedicated area for manipulating the blade 2. When removing the blade 2, gripping the auxiliary force-applying component 24 allows for easy extraction from the receiving slot without direct contact with the blade or searching for a suitable point of force around the handle 1. Similarly, when retracting the blade 2, pushing the auxiliary force-applying component 24 smoothly pushes the blade 2 back into the receiving slot. This precise operation method makes the removal and placement of the blade 2 simpler and faster.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A folding knife, characterized in that The utility model provides a folding knife, including handle (1), blade (2) and first connecting piece (3), first connecting piece (3) is connected handle (1) with blade (2) rotationally, with blade (2) is switched between the accommodation state and the unfolded state; Handle (1) is provided with guide groove (111), guide groove (111) includes circular arc segment (1111) and two limit section (1112), both ends of circular arc segment (1111) are connected with limit section (1112), the center of circular arc segment (1111) is the rotation center of handle (1) and blade (2), the extension direction of limit section (1112) and the tangent direction of circular arc segment (1111) are included angle; Blade (2) includes blade body (21), guide (22) and elastic element (23), the first long slot (211) is set up in blade body (21), first connecting piece (3) is arranged in the first long slot (211) slidingly, the guide (22) is fixedly arranged on the one end of the first long slot (211) in the extension direction of the first long slot (211) in blade body (21), the guide (22) is slidably matched with guide groove (111), elastic element (23) is elastically connected with first connecting piece (3), to drive first connecting piece (3) to the direction of being away from guide (22) sliding.

2. The pocket knife of claim 1, wherein, Limit section (1112) extends to the outside of circular arc segment (1111) along the radial direction of circular arc segment (1111).

3. The pocket knife of claim 1, wherein, Elastic element (23) is arranged in the first long slot (211).

4. The pocket knife according to any of claims 1-3, characterized in that Handle (1) is provided with accommodating groove, and the accommodating groove is used for accommodating the blade (2) in the folded state; Along the thickness direction of blade (2), the opposite sides of blade (2) are provided with guide (22), and the opposite side walls of the accommodating groove are provided with guide groove (111) correspondingly.

5. The pocket knife of claim 4, wherein, Handle (1) includes: Two handle bodies (11); First fastener (7) is connected with two handle bodies (11) and makes two handle bodies (11) spaced apart to form the accommodating groove.

6. The pocket knife of claim 5, wherein, Handle (1) further includes shell (12), and the outer wall of each handle body (11) is provided with shell (12).

7. The pocket knife of claim 5, wherein: First fastener (7) includes first nut (71), limit block (72) and second nut (73), limit block (72) is arranged between two handle bodies (11), and first nut (71) and second nut (73) are threadedly connected with limit block (72).

8. The pocket knife according to any of claims 1-3, characterized in that The folding knife further includes a clamping member (6) connected with the handle (1).

9. The pocket knife according to any of claims 1-3, characterized in that Blade (2) includes a first rotating part, handle (1) includes a second rotating part, first connecting piece (3) rotationally connects the first rotating part and the second rotating part, and a gasket (5) is arranged between the first rotating part and the second rotating part.

10. The pocket knife according to any one of claims 1-3, characterized in that The cutter head body (21) is provided with an auxiliary force applying member (24) protruding therefrom, which is located outside the shank (1).

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