A folding knife

Abstract

The present invention discloses a folding knife, which includes a knife handle and a knife head hinged to the front end of the knife handle and having a blade on the lower side. A receiving cavity for receiving the knife head is provided inside the knife handle; a spine is also included; the receiving cavity has openings at both the upper and lower ends, and the spine is installed at the upper end opening of the receiving cavity; the spine includes a fixing part connected to the knife handle and an elastic part connected to the front end of the fixing part and having elasticity; an unfolding lug is provided at the bottom of the elastic part, and an unfolding lock groove that can cooperate with the unfolding lug is provided on the upper side of the knife head; after the knife head is unfolded, the unfolding lug can be inserted into the unfolding lock groove to form a locking structure. The present invention can prevent the knife head of the folding knife from being accidentally unlocked when the folding knife is in use after being unfolded, thereby improving the safety of the folding knife during use.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting tools, and specifically relates to a folding knife. Background Art

[0002] Folding knives are widely used because of their convenient storage and delicate structure.

[0003] There are also many types of folding knife structures, and many folding knives are provided with locking mechanisms for locking when folding or unfolding the blade of the folding knife. For example, a folding cutting tool disclosed in the authorized publication number CN207087922U includes a blade, a first inner clip, a second inner clip, a locking hook, a first outer clip, a second outer clip, a central axis, a spring, a button, etc. Specifically, by pressing the button and using the ejector rod to push the locking piece to move, the locking hook at the end of the locking piece is separated from the card slot 31 provided on the second inner clip, and at this time, the blade can be folded; after releasing the button, the ejector rod provided on the button is reset under the action of the spring, the ejector rod leaves the locking piece, and the locking hook provided at the end of the locking piece is repositioned in the card slot, and at this time, the blade cannot move. Another example is a zip-type folding knife disclosed in the authorized publication number CN203471796U, which includes a storage body, a blade body, a zip mechanism, etc. Specifically, it uses the guide post of the zip mechanism to be inserted into the guide rail groove to achieve locking. Although the above two folding knives both have the function of locking the blade, they still have some disadvantages. For example, during the use of the folding knife in the unfolded state (such as during the process of cutting or stabbing objects), if there are suitable conditions, they may be accidentally unlocked; for example, during the use process, if the hand or other objects accidentally press the button in the first prior art document or push the guide post in the second prior art document, it may cause accidental unlocking, thus unable to ensure the safety during the use process, that is, it may cause injury to the user. Summary of the Invention

[0004] Aiming at the problems existing in the above prior art, the purpose of the present invention is to provide a folding knife, which can prevent the blade of the folding knife from being accidentally unlocked when people hold the handle during the use process of the unfolded blade, thereby improving the safety of the folding knife during the use process.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] A folding knife includes a knife handle and a blade head hinged to the front end of the knife handle and having a blade on the lower side. A receiving cavity for receiving the blade head is provided inside the knife handle; it also includes a spine; the receiving cavity is open at both the upper and lower ends, and the spine is installed at the upper end opening of the receiving cavity; the spine includes a fixing part connected to the knife handle and an elastic part connected to the front end of the fixing part and having elasticity; an unfolding lug is provided at the bottom of the elastic part, and an unfolding locking groove that can cooperate with the unfolding lug is provided on the upper side of the blade head; after the blade head is unfolded, the unfolding lug can be inserted into the unfolding locking groove to form a locking structure.

[0007] It also includes the following technical solutions:

[0008] A folding lug is also provided at the bottom of the elastic part behind the unfolding lug, and a folding locking groove that can cooperate with the folding lug is provided on the lower side of the blade head; after the blade head is folded, the folding lug can be inserted into the folding locking groove to form a locking structure.

[0009] A protruding part is provided on the side surface at the front end of the elastic part; a strip-shaped hole corresponding to the protruding part is provided on the side surface of the knife handle; the outer end of the protruding part passes through the strip-shaped hole and the protruding part can move up and down in the strip-shaped hole.

[0010] The protruding part is detachably connected or fixedly connected to the elastic part.

[0011] The top surface of the knife handle is flush with the top surface of the spine.

[0012] It also includes a hinge assembly, an eccentric transmission assembly and a clip assembly; a slot communicating with the receiving cavity is provided on one side surface of the knife handle; the hinge assembly includes a hinge shaft; the clip assembly is installed in the slot, and the clip assembly includes a clip; the blade head is hinged to the knife handle through the hinge shaft; the front end of the eccentric transmission assembly is respectively connected to the hinge shaft and the blade head, and the rear end is connected to the clip assembly; during the folding process of the blade head, the clip can be synchronously driven to extend out of the slot through the eccentric transmission assembly; during the unfolding process of the blade head, the clip can be synchronously driven to retract into the slot through the eccentric transmission assembly.

[0013] The eccentric transmission assembly includes an eccentric wheel and a transmission arm; the eccentric wheel is respectively eccentrically and movably connected to the side surfaces of the hinge shaft and the blade head; the front end of the transmission arm is movably connected to the eccentric wheel, and the rear end is connected to the clip assembly; during the unfolding or folding process of the blade head, the transmission arm can be correspondingly driven to move backward or forward through the eccentric wheel, and the transmission arm synchronously drives the clip to retract into the slot or extend out of the slot.

[0014] The clip assembly has elasticity; a protrusion is provided on the side surface of the rear end of the transmission arm, and a first inclined surface inclined from outside to inside is provided on the protrusion; a second inclined surface is provided on the clip assembly and is adapted to the first inclined surface; the transmission arm can drive the clip to retract into the slot or extend out of the slot inward by means of the cooperation of the first inclined surface and the second inclined surface and the elasticity of the clip assembly.

[0015] The clip assembly further includes an elastic member; the front side of the elastic member is connected to the front side of the slot; the clip is mounted on the elastic member; the second inclined surface is provided on the clip or the elastic member.

[0016] The clip includes a clip plate located outside the elastic member and a bent plate connected to the rear end of the clip plate; the second inclined surface is provided on the bent plate or the elastic member.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) By improving the structure of the locking structure, when the user firmly holds the knife handle with the palm during use, the spine will be simultaneously and firmly pressed, so that the unfolded lug can be stably inserted into the unfolded lock groove all the time, forming a stable locking structure. During use, whether the folding knife is used to cut or stab an object, it is very difficult for the knife head to rotate up and down. Even if the knife head rotates slightly, the unfolded lug will not be directly separated from the unfolded lock groove, that is, the folding knife will not be accidentally unlocked during the unfolded use, and the safety is high; at the same time, the present invention also has the advantages of simple and reasonable structure and convenient use.

[0019] (2) By providing the folding lug and the folding lock groove that cooperate with each other, it is convenient to lock the knife head in the storage cavity after folding. After the folding lug and the folding lock groove cooperate with the unfolded lug and the unfolded lock groove, a locking structure with simple structure, convenient use and good stability can be formed.

[0020] (3) By providing the protruding member and the strip hole, it is convenient to pull the elastic part, and at the same time, the knife head can be limited.

[0021] (4) By providing a hinge assembly, an eccentric drive assembly, and a clip assembly, the present invention enables the clip to achieve a telescopic effect in the slot in cooperation with the cutter head, so as to form a hidden design. When the cutter head is unfolded, the clip will retract into the slot, avoiding affecting the feel when people hold the handle and reducing the overall user experience. Also, because the clip is hidden, it is not easy for the clip to pierce into the palm when people hold the handle and apply force, which improves safety and is more ergonomic. After the cutter head is folded, the clip will extend out of the slot again, enabling the clip to be clamped onto other attachments, such as hanging on a pocket or belt, etc., without affecting the normal carrying of the folding knife.

[0022] (5) Through the transmission relationship between the eccentric wheel and the drive arm and the cutter head, the present invention can stably move the drive arm back and forth. By utilizing the cooperation between the first inclined surface and the second inclined surface, the telescoping of the clip can be achieved, and the stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the schematic diagram of the overall structure of the present invention Figure 1 ;

[0024] Figure 2 is the schematic diagram of the overall structure of the present invention Figure 2 ;

[0025] Figure 3 is the exploded view of the present invention;

[0026] Figure 4 is the schematic diagram of the internal structure of the present invention Figure 1 ;

[0027] Figure 5 is the schematic diagram of the internal structure of the present invention Figure 2 ;

[0028] Figure 6 is the schematic diagram of the partial structure of the present invention.

[0029] REFERENCE NUMERALS:

[0030] 1, handle; 11, left handle; 12, right handle; 13, first blocking portion; 14, recessed position; 101, receiving cavity; 102, strip hole; 2, cutter head; 21, unfolding lock groove; 22, folding lock groove; 3, spine; 31, fixing portion; 32, elastic portion; 321, protruding member; 322, second blocking portion; 33, unfolding lug; 34, folding lug; 4, hinge assembly; 41, retaining plate; 42, hinge shaft; 43, fixing member; 5, eccentric drive assembly; 51, eccentric wheel; 52, drive arm; 521, protrusion; 522, first inclined surface; 6, clip assembly; 61, elastic member; 62, clip; 621, hanging plate; 622, bending plate; 63, second inclined surface; 7, slot; 8, screw; 9, connecting rod; 10, limiting groove. Detailed implementation manners

[0031] The following further elaborates on the invention in conjunction with the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the protection scope of the invention. At the same time, for the convenience of description and understanding, the position descriptions in the following text are all based on the orientation when the folding knife is in the unfolded state.

[0032] As Figures 1 - 6 shown, a folding knife includes a knife handle 1 and a knife head 2 hinged to the front end of the knife handle 1 and having a blade on the lower side. A receiving cavity 101 for receiving the knife head 2 is provided inside the knife handle 1; the folding knife further includes a spine 3; in this embodiment, the receiving cavity 101 is open at both the upper and lower ends, and the spine 3 is installed at the upper opening of the receiving cavity 101; among them, for the structure of the spine 3, the spine 3 includes a fixing part 31 connected to the knife handle 1 and an elastic part 32 connected to the front end of the fixing part 31. Specifically, the elasticity of the elastic part 32 is similar to the elastic deformation of a spring plate; an unfolding lug 33 is provided at the bottom of the elastic part 32, and an unfolding locking groove 21 that can cooperate with the unfolding lug 33 is provided on the upper side of the knife head 2; after the knife head 2 is unfolded, the unfolding lug 33 can be inserted into the unfolding locking groove 21 to form a locking structure, so as to achieve the purpose of locking the knife head 2.

[0033] In order to enable the folding knife to also lock the knife head 2 in the folded state, the solution adopted in the present invention is that a folding lug 34 is further provided at the bottom of the elastic part 32 behind the unfolding lug 33, and a folding locking groove 22 that can cooperate with the folding lug 34 is provided on the lower side of the knife head 2; after the knife head 2 is folded, the folding lug 34 can be inserted into the folding locking groove 22, thereby also forming a locking structure. Therefore, through the above settings, when the knife head 2 is in the folded state, the knife head 2 can be locked by inserting the folding lug 34 into the folding locking groove 22.

[0034] Of course, as Figures 3 - 5 shown, for the shapes of the unfolding lug 33 and the unfolding locking groove 21 as well as the folding lug 34 and the folding locking groove 22, they can be set to appropriate shapes according to needs here. For example, in this embodiment, both the unfolding lug 33 and the folding lug 34 are set to have an arc-shaped lower side surface, so that the two lugs such as the unfolding lug 33 and the folding lug 34 can be inserted into or separated from the two locking grooves such as the unfolding locking groove 21 and the folding locking groove 22 more smoothly and are not easily blocked. Moreover, in order to improve the stability of the knife head 2 during use, in this embodiment, the size of the unfolding lug 33 is selected to be a little larger than that of the folding lug 34 to increase the contact area between the unfolding lug 33 and the unfolding locking groove 21 and improve the stiffness of the unfolding lug 33.

[0035] As Figures 1 - 5As shown in the figure, a protruding member 321 is provided on the side surface of the front end of the elastic part 32; a strip-shaped hole 102 corresponding to the protruding member 321 is provided on the side surface of the knife handle 1; the outer end of the protruding member 321 passes through the strip-shaped hole 102 and the protruding member 321 can move up and down in the strip-shaped hole 102. After the protruding member 321 is set, the elastic part 32 can be pulled by lifting the protruding member 321, that is, the deformation of the elastic part 32 can be conveniently realized, and it is more convenient to use. Of course, the main function of the strip-shaped hole 102 is to limit the protruding member 321. During the process of limiting the protruding member 321, the excessive movement of the tool bit 2 can be prevented. Because when the tool bit 2 is locked, the unfolded lug 33 is inserted into the unfolded lock groove 21. Therefore, when the tool bit 2 is locked and is subjected to a large upward external force, which may cause the tool bit 2 to continue to rotate slightly upward (that is, when the external force is greater than the holding force of the palm), it will synchronously drive the elastic part 32 to deform upward. And the strip-shaped hole 102 limits the protruding member 321 to prevent it from exceeding the set stroke. Therefore, when the protruding member 321 moves to the top of the strip-shaped hole 102, the tool bit 2 cannot continue to turn upward, that is, the strip-shaped hole 102 also plays a role in preventing the tool bit 2 from moving excessively and preventing it from exceeding the preset stroke. In other embodiments, the protruding member 321 can also be provided at other positions of the elastic part 32. For example, the protruding member 321 can also be provided on the top surface of the front end of the elastic part 32. In this way, people can also pull the elastic part 32 by pulling the protruding member 321 upward, but this setting method cannot achieve the effect of limiting the tool bit 2.

[0036] Preferably, as Figure 1 and Figure 2 shown in the figure, protruding members 321 are respectively provided on the two side surfaces of the front end of the elastic part 32, and strip-shaped holes 102 corresponding to and cooperating with the protruding members 321 are respectively provided on the two side surfaces of the knife handle 1, so that people can conveniently pull the elastic part 32. People can choose to use one of the protruding members 321 to pull the elastic part 32, or choose to use two protruding members 321 to pull the elastic part 32 at the same time.

[0037] The protruding member 321 is detachably connected or fixedly connected to the elastic part 32. Among them, when the protruding member 321 is detachably connected to the elastic part 32, the protruding member 321 can be threadedly connected to the elastic part 32. Of course, it can also be connected by a snap connection method, so as to facilitate disassembly and assembly. When the protruding member 321 is fixedly connected to the elastic part 32, the protruding member 321 and the elastic part 32 can be welded, heat-fitted or integrally formed, so as to ensure stability.

[0038] As Figure 1As shown, in the normal state, that is, when the elastic part 32 is not deformed, the top surface of the knife handle 1 is flush with the top surface of the spine 3, so that when the palm holds the knife handle 1, it can ensure that the palm will simultaneously press on the spine 3, avoiding that the elastic part 32 cannot be pressed tightly.

[0039] As Figures 3 - 6 shown, the folding knife further includes a hinge assembly 4, an eccentric drive assembly 5 and a clip assembly 6; a slot 7 communicating with the storage cavity 101 is provided on one side surface of the knife handle 1; the hinge assembly 4 includes a hinge shaft 42; the clip assembly 6 is installed in the slot 7, and the clip assembly includes a clip 62; the blade 2 is hinged to the knife handle 1 through the hinge shaft 42. Specifically, the blade 2 is sleeved on the hinge shaft 42, and the hinge shaft 42 is located in the storage cavity 101 and connected to the knife handle 1; the front end of the eccentric drive assembly 5 is respectively connected to the hinge shaft 42 and the blade 2, and the rear end is connected to the clip assembly 6; during the folding process of the blade 2, the clip assembly 6 can be synchronously driven to extend out of the slot 7 through the eccentric drive assembly 5, that is, the clip 62 extends out synchronously; during the unfolding process of the blade 2, the clip assembly 6 can be synchronously driven to retract into the slot 7 through the eccentric drive assembly 5, that is, the clip 62 retracts inward synchronously. Through the above settings, the clip 62 can achieve a synchronous telescopic effect during the unfolding or folding of the blade 2, so that the clip 62 can form a hidden design.

[0040] As Figures 3 - 6 shown, the eccentric drive assembly includes an eccentric wheel 51 and a drive arm 52; the eccentric wheel 51 is respectively eccentrically and movably connected to the side surfaces of the hinge shaft 42 and the blade 2. Specifically, the eccentric wheel 51 is directly eccentrically sleeved on the hinge shaft 42, and the eccentric connection between the eccentric wheel 51 and the blade 2 is connected through a connecting rod 9; the front end of the drive arm 52 is movably connected to the eccentric wheel 51, and the rear end is connected to the clip assembly 6; in this embodiment, the front end of the drive arm 52 is in a ring shape, and the drive arm 52 uses its ring-shaped front end to be movably sleeved on the eccentric wheel 51, so that the drive arm 52 can be driven to move back and forth when the eccentric wheel 51 rotates. In addition, in other embodiments, the front end of the drive arm 52 can also be movably connected to a connecting column and the connecting column is eccentrically connected to the eccentric wheel 51, so that the movable connection between the eccentric wheel 51 and the drive arm 52 can also be realized, and the drive arm 52 can be driven to move back and forth when the eccentric wheel 51 rotates; during the unfolding or folding process of the blade 2, the eccentric wheel 51 can correspondingly drive the drive arm 52 to move backward or forward, and the drive arm 52 synchronously drives the clip 62 to retract into the slot 7 or extend out of the slot 7.

[0041] Preferably, as Figures 3 - 6As shown, the clip assembly 6 is elastic; a protrusion 521 is provided on the side surface of the rear end of the transmission arm 52, and a first inclined surface 522 inclined from outside to inside is provided on the protrusion 521; a second inclined surface 63 matched with the first inclined surface 522 is provided on the clip assembly 6; the transmission arm 52 can drive the clip 62 to retract into the slot 7 or extend out of the slot 7 inwardly by the cooperation of the first inclined surface 522 and the second inclined surface 63 and the elasticity of the clip assembly 6. Through the above settings, the clip 62 can achieve a telescopic effect on the basis of the elasticity of the clip assembly 6, so as to form a hidden design.

[0042] More preferably, as Figures 3 - 6 shown, the clip assembly 6 further includes an elastic member 61; the front side of the elastic member 61 is connected to the front side of the slot 7. Of course, the elastic member 61 can also be connected to the upper side or the lower side of the slot 7; the clip 62 is mounted on the elastic member 61, and the second inclined surface 63 is provided on the clip 62 or the elastic member 61. Through the above settings, it is convenient to drive the first inclined surface 522 and the second inclined surface 63 to cooperate synchronously during the unfolding and folding processes of the cutter head 2, so that the protrusion 521 on the transmission arm 52 can push the clip assembly 6 or gradually move away from the clip assembly 6. And because the elastic member 61 itself has deformation elasticity and is connected to the clip 62, the extension and retraction of the clip 62 can be finally realized.

[0043] As Figure 6 shown, the clip 62 includes a clip plate 621 located outside the elastic member 61 and a bent plate 622 connected to the rear end of the clip plate 621; wherein, the second inclined surface 63 is provided on the bent plate 622. Specifically, one end of the bent plate 622 is locked with the elastic member 61 by a screw for fixation, and the second inclined surface 63 is provided on the other end. After the above settings, the elastic member 61 and the clip 62 can be conveniently fixed together. However, the shape of the clip assembly 6 does not necessarily have to be set as Figure 6 shown in. For example, the clip 62 can also be directly fixed on the outer side surface of the elastic member 61, and the second inclined surface 63 is provided at the corresponding position of the elastic member 61. At the same time, for the convenience of manufacturing, in other embodiments, the clip 62 can also be directly integrally formed with the elastic member 61.

[0044] In other embodiments, the clip assembly 6 may not be provided with the elastic member 61 and instead be provided with other lifting components to drive the clip 62 to expand and contract. For example, a plurality of connecting rods may be used to drive the clip 62, and the connecting rods are respectively connected to the clip 62 and the transmission arm 52; a moving rod with both ends hinged to the clip 62 and the transmission arm 52 may also be provided. In this way, the principle of its hinge and the displacement during the movement of the transmission arm 52 can be used to drive the moving rod to swing. During the swinging of the moving rod, the clip 62 can be extended out of the slot 7 or retracted into the slot 7, and the slot 7 is used to limit the position of the clip 62, so that the clip 62 can only perform the action of expansion and contraction.

[0045] As Figure 3 shown, in order to enable the transmission arm 52 to move more stably, a limiting groove 10 for limiting the transmission arm 52 is provided on the inner wall of the tool handle 1. The transmission arm 52 is correspondingly embedded in the limiting groove 10, and the shape of the limiting groove 10 coincides with the movement track of the transmission arm 52.

[0046] In this embodiment, as Figure 3 shown, the tool handle 1 includes a left tool handle 11 and a right tool handle 12; the receiving cavity 101 is formed between the left tool handle 11 and the right tool handle 12. Moreover, the left tool handle 11 and the right tool handle 12 are respectively fixedly connected to the fixing part 31, so as to facilitate the assembly between various components and also enable the convenient production of components.

[0047] As Figure 1 shown, in order to improve stability and disassembly and assembly efficiency, the fixing part 31 is fixedly connected to the left tool handle 11 and the right tool handle 12 respectively by a plurality of uniformly distributed screws 8. Of course, if the left tool handle 11 and the right tool handle 12 only need to be fixed to the fixing part 31 by one or two screws 8, then one or two screws 8 can also be used.

[0048] As Figure 5 and Figure 6 shown, the hinge assembly 4 further includes a retaining piece 41 and a fixing member 43; the fixing member 43 is connected to the tool handle 1 and penetrates into the receiving cavity 101 to be connected to the hinge shaft 42. Specifically, a fixing member 43 is respectively connected to the left tool handle 11 and the right tool handle 12, and then the two fixing members 43 are respectively connected to one end of the hinge shaft 42, so that the positioning of the hinge shaft 42 can be completed, that is, the hinge shaft 42 is connected to the tool handle 1 through the fixing member 43; the retaining piece 41 is sleeved on the hinge shaft 42, and the retaining piece 41 and the eccentric wheel 51 are respectively located on both sides of the tool head 2, so as to avoid the direct contact between the tool head 2 and the tool handle 1, which increases the friction force, and can also ensure that the position of the tool head 2 is not easily changed. Through the above settings, it is convenient to fix the tool head 2 well, and the tool head 2 can rotate more stably, and then the clip 62 can be stably driven to move.

[0049] As shown Figure 1 In order to enhance the connection stability of the fixing member 43, a gasket can be respectively provided on the outer side surfaces of the left handle 11 and the right handle 12. The fixing members 43 on the left handle 11 and the right handle 12 are respectively passed through the gaskets, and the outer ends of the fixing members 43 are respectively pressed against one gasket, so as to enhance the stability of the fixing member 43. Preferably, the gasket can be made of a soft material. By providing the gasket, it can prevent the fixing members 43 on the left handle 11 and the right handle 12 from overly tightening or squeezing the spine 3, avoiding affecting the normal elastic use of the spine 3.

[0050] Preferably, in order to facilitate disassembly and assembly, the fixing member 43 can be a bolt, so as to achieve a fast disassembly and assembly effect.

[0051] In this embodiment, as shown Figure 3 In the figure, the slot 7 is provided on the right handle 12. In order to improve the stability, the elastic member 61 is fixedly connected to the right handle 12. And for the convenience of production and manufacture, the elastic member 61 is integrally formed with the right handle 12. Of course, it is also possible to set the slot 7 and the elastic member 61 on the left handle 11, which is mainly designed according to people's needs to meet different requirements. In addition, if the firmness can be ensured between the elastic member 61 and the handle 1, a detachable connection method can also be adopted, such as a snap-fit or a clamping connection method.

[0052] As shown Figure 1 In the figure, in order to facilitate people's holding, on the upper and lower sides of the front end of the handle 1, they respectively protrude upward and downward to form a first blocking portion 13, that is, the first blocking portion 13 is provided on both the left handle 11 and the right handle 12. At the same time, the side of the first blocking portion 13 facing backward is concave-arc-shaped. Similarly, in order to make the spine 3 fit with the handle 1, on the upper side of the front end of the elastic portion 32, it also protrudes upward to form a second blocking portion 322 corresponding to the first blocking portion 13, and the side of the second blocking portion 322 facing backward is also concave-arc-shaped. At the same time, on the lower side of the front ends of the left handle 11 and the right handle 12, there is also a recess 14 located behind the first blocking portion 13. Through the above settings, it can make the folding knife greatly convenient for people to hold. It uses the first blocking portion 13 and the second blocking portion 322 to block the fingers and prevent the palm from touching the blade and causing injury. Then, it uses the recess 14 to allow the index finger, etc. to be inserted, improving the stability during holding and also making it more stable when the palm presses the elastic portion 32, so that the folding knife can be more stable during use. Moreover, after the above settings, the folding knife has a better feel when being held.

[0053] To make the folding knife applicable to a wider range of users, the lengths of the handle 1 and the spine 3 can be set with reference to the width of an adult's palm to avoid the situation where the handle 1 and the spine 3 are not suitable for a wide range of people. Of course, if a miniaturized version is needed, the palm of a child can also be used as a reference.

[0054] The front end of the spine 3 is basically flush with the front end of the handle 1, improving the aesthetic appearance.

[0055] To make it more stable when people hold it, anti-slip patterns are provided on the sides of the left handle 11 and the right handle 12.

[0056] The handle 1 can be made of plastic, and the spine 3 can be made of plastic or metal.

[0057] The following introduces the specific working principle of the present invention for better understanding:

[0058] First, when the folding knife is in the unfolded state, for example, when it is in the Figure 1 state, at this time, the unfolded lug 33 is inserted into the unfolded locking groove 21 to form a locking structure. At the same time, the hanging plate 621 is located inside the slot 7 or flush with the slot 7. When people hold the handle 1 and the spine 3, they will always press the elastic part 32 with their palm, that is, the whole spine 3 is not easily deformed and the blade 2 cannot rotate. In this way, the blade 2 can be used to cut or stab objects, etc., and it is also very difficult for the blade 2 to disengage from the unfolded lug 33, that is, it is very difficult for the blade 2 to unlock.

[0059] Next, when wanting to fold the folding knife, directly lift the protruding part 321, and use the elasticity of the elastic part 32 to make the elastic part 32 deform upward, and the unfolded lug 33 disengages from the unfolded locking groove 21. After the unfolded lug 33 disengages from the unfolded locking groove 21, the blade 2 can be folded into the receiving cavity 101. During the folding process of the blade 2, the eccentric wheel 51 will be driven to rotate synchronously. With the hinge shaft 42 as the fulcrum, the connection between the eccentric wheel 51 and the blade 2 moves from back to front, so that the eccentric wheel 51 flips forward, that is, the eccentric wheel 51 drives the transmission arm 52 to move forward. During the forward movement of the transmission arm 52, through the contact between the first inclined surface 522 and the second inclined surface 63, the elastic member 61 is pushed to deform outward, and the hanging clip 62 is driven to extend out of the slot 7 until the hanging plate 621 completely extends out of the slot 7, so that the folding knife can be mounted on other objects using the hanging clip 62. Of course, at this time, the blade 2 is just properly received in the receiving cavity 101, and the folding lug 34 is just inserted into the folding locking groove 22 to form a locking structure.

[0060] Similarly, when the blade 2 is to be opened again, the protruding member 321 is lifted again, causing the elastic portion 32 to deform upward and the folding lug 34 to disengage from the folding lock groove 22. Then, the blade 2 can be unfolded forward. During the unfolding process of the blade 2, the eccentric wheel 51 is driven to rotate. With the hinge shaft 42 as the fulcrum, the connection between the eccentric wheel 51 and the blade 2 moves from front to back, causing the eccentric wheel 51 to flip backward. That is, the eccentric wheel 51 drives the transmission arm 52 to move backward. After the transmission arm 52 moves backward, the first inclined surface 522 and the second inclined surface 63 gradually move away from each other. Then, the elastic member 61, with the external force pressing on it reduced, gradually retracts into the slot 7 by its own reset elasticity until the hanging clip 62 is completely retracted into the slot 7 or flush with the slot 7, forming a hidden design. When the blade 2 moves into place, the unfolding lug 33 is inserted into the unfolding lock groove 21, forming a locking structure. At this time, the protrusion 521 also just moves to the preset farthest position.

[0061] In summary, through the structural improvement of the locking structure, when the user firmly holds the handle of the knife with the palm during use, the spine is simultaneously firmly pressed, enabling the unfolding lug to be stably inserted into the unfolding lock groove all the time, forming a stable locking structure. During use, whether cutting or stabbing with the folding knife, it is very difficult for the blade to rotate up and down. Even if the blade rotates slightly, the unfolding lug will not directly separate from the unfolding lock groove. That is, the folding knife will not accidentally unlock during the unfolding and use process, ensuring high safety. At the same time, the present invention also has the advantages of simple and reasonable structure and convenient use.

[0062] For other corresponding technical features for assisting the implementation of the technical solution of the present invention, those skilled in the art can implement them accordingly or make improvements on the basis of the existing conventional technical means. Technical means in other related aspects will not be elaborated here.

[0063] In the description of this specification, if terms such as "Embodiment 1", "this embodiment", "specific implementation", etc. are used, it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention or the invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0064] In the description of this specification, terms such as "connection", "installation", "fixation", "setting", "having", etc. are understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and technical effects, or it can be an integral connection or a partial connection. In the same way, for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and apply. Those skilled in the art can obviously make various modifications to these examples easily and apply the general principles described here to other embodiments without creative labor. Therefore, this case is not limited to the above embodiments, and the following modifications should all be within the protection scope of this case: ① A new technical solution implemented based on the technical solution of the present invention and combined with the existing common knowledge; ② An equivalent replacement of some features of the technical solution of the present invention using well-known technologies, resulting in the same technical effects as the technical effects of the present invention. For example, an equivalent replacement of conventional production equipment and devices used in the process; ③ An expansion based on the technical solution of the present invention, and the substantial content of the expanded technical solution does not exceed the technical solution of the present invention; ④ An equivalent transformation using the content recorded in the text of the present invention or the drawings of the specification, and applying the obtained technical means to the solutions in other related technical fields.

Claims

1. A folding knife with a hidden clip, comprising a knife handle and a blade head hinged to the front end of the knife handle and having a blade on the lower side. There is a receiving cavity for receiving the blade head inside the knife handle, and it is characterized in that: The folding knife further comprises a hinge assembly, an eccentric drive assembly and a clip assembly; there is a slot on one side surface of the knife handle that communicates with the receiving cavity; the hinge assembly comprises a hinge shaft; the clip assembly is installed in the slot, and the clip assembly comprises a clip; the blade head is hinged to the knife handle through the hinge shaft; the front end of the eccentric drive assembly is respectively connected to the hinge shaft and the blade head, and the rear end is connected to the clip assembly; during the folding process of the blade head, the clip can be synchronously driven by the eccentric drive assembly to extend out of the slot; during the unfolding process of the blade head, the clip can be synchronously driven by the eccentric drive assembly to retract into the slot; The eccentric drive assembly comprises an eccentric wheel and a drive arm. The eccentric wheel is eccentrically connected to the blade head through a connecting rod; the eccentric wheel is respectively eccentrically and movably connected to the side surfaces of the hinge shaft and the blade head; the front end of the drive arm is movably connected to the eccentric wheel, and the rear end is connected to the clip assembly; During the unfolding or folding process of the blade head, the eccentric wheel can correspondingly drive the drive arm to move backward or forward, and the drive arm synchronously drives the clip to retract into the slot or extend out of the slot; The hinge assembly further comprises a retaining piece and a fixing piece. The fixing piece is connected to the knife handle and one end penetrates into the receiving cavity to be connected to the hinge shaft. The retaining piece is sleeved on the hinge shaft, and the retaining piece and the eccentric wheel are respectively located on both sides of the blade head; The clip assembly has elasticity; there is a protrusion on the side surface of the rear end of the drive arm, and a first inclined surface inclined from outside to inside is arranged on the protrusion; a second inclined surface is arranged on the clip assembly to cooperate with the first inclined surface; the drive arm can drive the clip to retract into the slot or extend out of the slot by the cooperation of the first inclined surface and the second inclined surface and the elasticity of the clip assembly, and There is a limiting groove for limiting the drive arm on the inner wall of the knife handle, and the drive arm is correspondingly embedded in the limiting groove.

2. The folding knife with a hidden clip according to claim 1, characterized in that: The clip assembly further comprises an elastic member; the front side of the elastic member is connected to the front side of the slot; the clip is installed on the elastic member; the second inclined surface is arranged on the clip or the elastic member.

3. The folding knife with a hidden clip according to claim 2, characterized in that: The clip comprises a clip plate located outside the elastic member and a bent plate connected to the rear end of the clip plate; the second inclined surface is arranged on the bent plate or the elastic member.

4. The folding knife with a hidden clip according to claim 2, characterized in that: The elastic member is integrally formed with the right knife handle.

5. The folding knife with a hidden clip according to claim 1, characterized in that: The front end of the transmission arm is annular, and the front end of the transmission arm is movably sleeved on the eccentric wheel.

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