Folding knife

Abstract

The utility model discloses a folding knife which comprises a knife handle and a blade, the knife handle comprises a left handle piece and a right handle piece, the blade can be rotatably opened and folded, an elastic piece is arranged on the left side of the right handle piece, a first lock catch and a second lock catch are arranged at the movable end of the elastic piece, and a first buckling position and a second buckling position are arranged on the side wall of the blade. When the blade is in an open state, the elastic piece can drive the first lock catch to be buckled with the first buckling position under the action of no external force, meanwhile, the second lock catch is buckled with the second buckling position, and the movable end of the elastic piece is pushed to deform rightwards to drive the two lock catches to be separated from the corresponding buckling positions. According to the folding knife, the double lock catches are buckled with the two buckling positions of the blade respectively, the blade locking stability of the elastic piece can be improved, buckling of the elastic piece and the blade is more stable, the elastic piece is not prone to automatically deforming to cause the mistaken unlocking phenomenon, and therefore the structural stability of the blade in the opening state is improved; and the structure of the blade in the open state is more stable, so that the blade can be used for cutting articles more conveniently and safely.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, and particularly relates to a folding knife. Background Art

[0002] A folding knife is a manual cutting tool used for cutting objects. Its blade can be rotated to open and fold. When in use, the blade can be rotated to open and use it to cut objects. When not in use, the blade can be rotated to fold it, and the blade can be stored in the handle, protecting the blade and making it easy to carry and store.

[0003] Existing folding knives generally include a left handle and a right handle that are positioned opposite each other, a blade hinged at the front end between the two handles, and a spring element on the right handle. The blade can be rotated relative to the two handles to open and fold. When the blade is rotated to the open position, the front end of the spring element abuts against the rear end of the blade in the absence of external force, preventing the blade from rotating and folding, thereby locking the blade in the open position and ensuring the structural stability of the blade in the open position, making it easier to cut. The spring element can be moved outward to deform and disengage the notch in the blade, releasing the lock and allowing the blade to be rotated and folded.

[0004] However, the existing folding knives still have some shortcomings. That is, the existing folding knives lock the blade by abutting the front end of the spring piece against the rear end of the blade. This locking of the blade is not stable enough, and the front end of the spring piece is prone to automatic deformation and misalignment with the rear end of the blade, which makes it easy for mislocking to occur. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a folding knife that can lock the blade more securely in the open state.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a folding knife, comprising a handle and a blade, the above-mentioned handle comprises a left handle piece and a right handle piece connected to the right side of the left handle piece, the rear end of the blade is rotatably connected to the left position of the front end of the right handle piece, so that the blade can be rotated to open and fold relative to the handle, and a cutting edge groove is provided on the lower side between the left handle piece and the right handle piece. When the blade is in the folded state, the cutting edge of the blade is received in the cutting edge groove, and the left side of the above-mentioned right handle piece is provided with a spring plate, the rear end of the spring plate is fixedly connected to the right handle piece, the front end of the spring plate is a movable end, the movable end of the spring plate is provided with a first lock buckle and a second lock buckle, and the side wall of the blade is provided with a first buckle position and a second buckle position. When the blade is in the open state and the spring plate will drive the first lock buckle to buckle with the first buckle position without external force, and the second lock buckle will buckle with the second buckle position at the same time, and pushing the movable end of the spring plate to deform to the right will drive the two lock buckles to disengage from the corresponding buckle positions.

[0007] In the above solution, by providing a first lock catch and a second lock catch at the movable end of the spring sheet, when the blade is in the open state and the spring sheet is free of external force, the two lock catches are driven to engage with corresponding locking positions, thereby locking the blade in the open state. The two lock catches of the spring sheet are respectively engaged with the two locking positions of the blade, thereby improving the locking stability of the spring sheet on the blade, making the locking engagement of the spring sheet and the blade more stable. This makes it less likely that the spring sheet will automatically deform and cause the lock catches to automatically disengage, thereby improving the structural stability of the blade in the open state. The more stable the blade structure in the open state, the more convenient and safer it will be to use the blade to cut objects. Furthermore, when it is necessary to release the blade from the open state, the movable end of the spring sheet can be pressed to the right to deform, which will drive the two lock catches to disengage from their corresponding locking positions, thereby releasing the lock and allowing the blade to be rotated and folded.

[0008] Furthermore, the above-mentioned first lock is a protrusion arranged at the left side of the movable end of the spring piece, and the first buckle position is a first buckle groove opened on the side wall of the blade. When the blade is in the open state and the spring piece will drive the protrusion to be inserted into the first buckle groove without external force, so that the protrusion is engaged with the first buckle groove, so that the blade cannot rotate due to the obstruction of the protrusion, thereby locking the blade in the open state. Pushing the movable end of the spring piece to deform to the right will drive the protrusion out of the first buckle groove, and the lock of the blade in the open state can be released.

[0009] Furthermore, the aforementioned second latching position is a second latching groove formed in the side wall of the blade. The second latch includes a hemispherical protrusion located to the left of the movable end of the spring. When the blade is in the open position and the spring, without external force, drives the hemispherical protrusion to insert into the second latching groove, thereby engaging the hemispherical protrusion with the second latching groove to lock the blade in the open position. Pressing the movable end of the spring to the right causes the hemispherical protrusion to disengage from the second latching groove, thereby releasing the lock on the blade in the open position. In addition, this solution configures the second latching structure as a hemispherical protrusion, which makes it easier for the hemispherical protrusion to be inserted into and out of the second latching groove, so that the hemispherical protrusion will not get stuck during the process of engaging and disengaging with the second latching groove.

[0010] Furthermore, the second lock buckle further comprises an inner collar, an outer collar and an insertion post. The movable end of the spring piece is provided with an insertion hole, the left end of the inner collar is provided with a convex ring, the left side of the insertion hole is provided with an annular groove, the right end of the insertion post is provided with a column cap, the right handle piece is provided with an avoidance hole corresponding to the second lock buckle position, the convex ring is fitted in the annular groove, and the inner collar passes through the insertion hole and extends to the right side of the spring piece, the outer collar is sleeved on the outer side of the inner collar corresponding to the right side of the spring piece, so that the inner collar cannot escape from the insertion hole to the left under the restriction of the outer collar, a hemispherical protrusion is provided at the left end of the insertion post, the insertion post passes through the central through hole of the inner collar and causes the hemispherical protrusion to extend to the left side of the spring piece, the column cap is located at the right side of the inner collar, and the column cap diameter is larger than the central through hole diameter of the inner collar, so that the column cap cannot pass through the central through hole of the inner collar. This solution can facilitate the disassembly and replacement of the second lock buckle and has stable installation.

[0011] Furthermore, the blade sidewall is further provided with a third locking groove. When the blade is in the folded state and the spring clip, without external force, drives the protrusion into the third locking groove, the protrusion then blocks the third locking groove of the blade, preventing the blade from rotating and thereby locking the blade in the folded state. Pressing the movable end of the spring clip to the right causes the protrusion to disengage from the third locking groove, thereby releasing the lock on the blade in the folded state.

[0012] Furthermore, the first buckle position, the second buckle position and the rotation axis of the blade form a triangular structure, which can provide better locking stability for the blade in the open state.

[0013] Furthermore, when the blade is in the open position, the rear end of the blade abuts against the front end of the left handle, which blocks further rotation of the blade in the opening direction, thereby positioning the blade in the open position and facilitating alignment of the two lock catches with corresponding buckle positions, making engagement more convenient. A clearance is provided on the left handle corresponding to the active end of the spring, allowing the user to press the spring through the clearance to deform the spring, making unlocking more convenient.

[0014] Furthermore, a mounting slot is provided on the left side of the right handle, into which a spacer is fitted. The rear end of the spring is integrally formed with the spacer, facilitating its removal and replacement. A clearance groove is provided at the bottom of the mounting slot, corresponding to the active end of the spring, to allow sufficient space for the spring to deform and unlock.

[0015] Furthermore, a limiting protrusion is provided on the left side of the rear end of the above-mentioned spacer, and a limiting groove is provided on the right side of the left handle piece. The limiting protrusion of the spacer cooperates with the limiting groove of the left handle piece to prevent the left handle piece from moving horizontally relative to the spacer, making assembly more convenient.

[0016] Furthermore, the upper side walls of the left and right handles are provided with cutting grooves, each containing a cutting blade that can be used to cut cords, etc. A belt clip is provided on the right side of the right handle, so that the folding knife can be attached to a belt, etc., for easier carrying.

[0017] This folding knife features dual locking buckles to secure the blade in the open position, ensuring secure locking and safer cutting. The second buckle is easily removable and replaceable, and its hemispherical structure ensures smooth engagement and disengagement without any lag. Furthermore, a third buckle slot locks the blade in the folded position, ensuring structural stability in both the open and folded positions and making it more convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the first structural position of the folding knife in the open state according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the second structural position of the folding knife in the open state according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic structural diagram of a folding knife according to an embodiment of the present invention in a folded state.

[0021] Figure 4 This is a schematic diagram of the exploded structure of a folding knife according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the exploded structure of the spacer, spring piece and second lock buckle of the folding knife according to an embodiment of the present utility model.

[0023] Figure 6 This is a schematic structural diagram of the left handle of a folding knife according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the accompanying drawings. The positional relationships depicted in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0027] Example 1

[0028] like Figure 1-4 As shown, this embodiment provides a folding knife, including a handle 1 and a blade 2. The handle 1 includes a left handle piece 11 and a right handle piece 12 connected to the right side of the left handle piece 11. The rear end of the blade 2 is rotatably connected to the left side of the front end of the right handle piece 12 so that the blade 2 can be rotated to open and fold relative to the handle 1. A cutting edge groove 10 is provided on the lower side between the left handle piece 11 and the right handle piece 12. Specifically, as shown in FIG. Figure 6 As shown, the cutting edge groove 10 is opened at the lower edge of the right side of the left handle 11. Figure 3 As shown, when the blade 2 is in the folded state, the cutting edge of the blade 2 is received in the cutting edge groove 10, thereby protecting the cutting edge of the blade 2 and preventing the user from being accidentally injured by the blade 2. Figure 1 As shown, when the blade 2 is in the open state, the rear end of the blade 2 abuts against the front end of the left handle piece 11. At this time, the front end of the left handle piece 11 will prevent the blade 2 from continuing to rotate in the opening direction to position the blade 2 in the open state.

[0029] like Figure 4 As shown, a spring clip 13 is provided on the left side of the right handle 12. The rear end of the spring clip 13 is fixedly connected to the right handle 12, and the front end of the spring clip 13 is a movable end. The movable end of the spring clip 13 is provided with a first lock catch 3 and a second lock catch 4. The side wall of the blade 2 is provided with a first buckle 21 and a second buckle 22. When the blade 2 is in the open state and the spring clip 13 is free of external force, the first lock catch 3 is engaged with the first buckle 21, and the second lock catch 4 is engaged with the second buckle 22. Pushing the movable end of the spring clip 13 to the right to deform causes the two lock catches to disengage from their corresponding buckles. The line connecting the first buckle 21, the second buckle 22, and the rotation axis of the blade 2 forms a triangle structure, which provides better locking stability for the blade 2 in the open state.

[0030] The folding knife of this embodiment is provided with a first lock catch 3 and a second lock catch 4 at the movable end of the spring leaf 13, so that the blade 2 has a double lock catch for locking in the open state, thereby improving the locking stability of the spring leaf 13 on the blade 2 and making the engagement of the spring leaf 13 and the blade 2 more stable. In this way, the spring leaf 13 is less likely to deform automatically and cause mis-locking, thereby improving the structural stability of the blade 2 in the open state. The more stable the structure of the blade 2 in the open state, the more convenient and safer it is to use the blade 2 to cut objects. The lock of the blade 2 in the open state can be released by pushing the movable end of the spring leaf 13 to the right to deform so that the two lock catches disengage from their corresponding buckles.

[0031] Example 2

[0032] This embodiment is a further improvement on the folding knife structure of the first embodiment. The improvement is that Figure 4 As shown, the above-mentioned first lock buckle 3 is a protrusion arranged on the left side of the movable end of the spring piece 13, the first buckle position 21 is a first buckle groove 21 opened on the side wall of the blade 2, and the above-mentioned second buckle position 22 is a second buckle groove 22 opened on the side wall of the blade, and the second lock buckle 4 includes a hemispherical protrusion 40 located on the left side of the movable end of the spring piece 13.

[0033] like Figure 1 As shown, when the blade 2 is in the open state and the spring piece 13, without external force, drives the protrusion to insert into the first buckle groove, and at the same time, the hemispherical protrusion 40 is inserted into the second buckle groove, so that the protrusion engages with the first buckle groove and the hemispherical protrusion 40 engages with the second buckle groove, so that the blade 2 cannot rotate due to the obstruction of the protrusion and the hemispherical protrusion 40, thereby locking the blade 2 in the open state. In this embodiment, the second lock 4 is configured as a hemispherical protrusion 40 structure, which makes it easier for the hemispherical protrusion 40 to insert and disengage from the second buckle groove, so that the hemispherical protrusion 40 will not get stuck during the process of engaging and disengaging with the second buckle groove.

[0034] like Figure 3 As shown, when the blade 2 needs to be folded, the movable end of the spring 13 can be pushed to the right to deform, which can drive the protrusion out of the first buckle groove and the hemispherical protrusion out of the second buckle groove, thereby releasing the lock of the blade 2 in the open state, so that the blade 2 can be rotated and folded. Figure 1 As shown, the left handle 11 is provided with a clearance opening 111 at the position of the movable end of the spring 13, so that the user can press the spring 13 through the clearance opening 111 to deform and unlock more conveniently.

[0035] Specifically, if Figure 4 、 5As shown, the above-mentioned second lock buckle 4 also includes an inner ring 41, an outer ring 42 and a plug post 43. The movable end of the spring piece 13 is provided with an insertion hole 130, and the left end of the inner ring 41 is provided with a convex ring 411. The convex ring 411 and the inner ring 41 are an integral structure. The left side of the insertion hole 430 is provided with an annular groove 1301, and the right end of the plug post 43 is provided with a column cap 431. The above-mentioned right handle piece 12 is provided with an avoidance hole 121 corresponding to the position of the second lock buckle 4, the convex ring 411 is cooperated and installed in the annular groove 1301, and the inner ring 41 passes through the insertion hole 130 and extends to the right side of the spring piece 13. The outer ring 42 is sleeved on the outer side of the inner ring 41 corresponding to the right side of the spring piece 13, so that the inner ring 41 cannot fall out of the insertion hole 130 to the left under the restriction of the outer ring 42, and under the cooperation of the convex ring 411 and the annular groove 1301, the inner ring 41 cannot fall out of the insertion hole 130 to the right, thereby ensuring the installation stability of the inner ring 41.

[0036] The above-mentioned hemispherical protrusion 40 is arranged at the left end of the plug column 43. The hemispherical protrusion 40, the plug column 43 and the column cap 431 are an integrated structure. The plug column 43 passes through the central through hole 410 of the inner ring 41 and makes the hemispherical protrusion 40 extend to the left side of the spring piece 13. The column cap 431 is located on the right side of the inner ring 41, and the diameter of the column cap 431 is larger than the diameter of the central through hole 410 of the inner ring 41, so that the column cap 431 cannot pass through the central through hole 410 of the inner ring 41, thereby ensuring the installation stability of the plug column 43.

[0037] Example 3

[0038] This embodiment is a further improvement on the folding knife structure of the second embodiment. The improvement is that Figure 3 As shown, the side wall of the blade 2 is further provided with a third locking groove 23. When the blade 2 is in the folded state and the spring piece 13, without external force, drives the protrusion to insert into the third locking groove 23, the protrusion then blocks the third locking groove 23 of the blade 2, preventing the blade 2 from rotating, thereby locking the blade 2 in the folded state. Pressing the movable end of the spring piece 13 to the right causes the protrusion to disengage from the third locking groove 23, thereby releasing the lock on the blade 2 in the folded state and allowing the blade 2 to be rotated and opened.

[0039] like Figure 4 As shown, the left side of the right handle 12 is provided with a mounting slot 120, in which a spacer 14 is mounted. The rear end of the spring clip 13 is integrally formed with the spacer 14, which facilitates the removal and replacement of the spring clip 13. A clearance slot 1201 is provided at the bottom of the mounting slot 120, corresponding to the movable end of the spring clip 13. The clearance slot 1201 is used to reserve sufficient space for the spring clip 13 to achieve the deformation and unlocking operation.

[0040] like Figure 4 、 6As shown, a limiting protrusion 141 is provided on the left side of the rear end of the above-mentioned spacer 14, and a limiting groove 112 is provided on the right side of the left handle piece 11. The limiting protrusion 141 of the spacer 14 cooperates with the limiting groove 112 of the left handle piece 11 to prevent the left handle piece 11 from moving horizontally relative to the spacer 14, making assembly more convenient.

[0041] like Figure 4 As shown, the above-mentioned blade 2 is hinged to the right handle piece 12 through a parent-child nail assembly, and the parent-child nail assembly includes a parent nail 61 and a child nail 62. The parent nail 61 passes through the spacer 14 and the right handle piece 12 in sequence and is connected to the child nail 62, so that the blade 2 can be rotated around the parent nail 61 to open and fold.

[0042] like Figure 2 As shown, the upper sidewalls of the rear ends of the left and right handles 11 and 12 are provided with cutting grooves 5, each containing a cutting blade 51 for conveniently cutting cords and the like. A belt clip 7 is provided on the right side of the right handle 12, allowing the folding knife to be attached to a belt or other item for greater convenience.

[0043] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A folding knife comprising a handle (1) and a blade (2), characterized in that: The knife handle (1) comprises a left handle piece (11) and a right handle piece (12) connected to the right side of the left handle piece (11); the rear end of the blade (2) is rotatably connected to the left side of the front end of the right handle piece (12), so that the blade (2) can be rotated, opened and folded relative to the knife handle (1); a cutting edge groove (10) is provided on the lower side between the left handle piece (11) and the right handle piece (12); when the blade (2) is in a folded state, the cutting edge of the blade (2) is received in the cutting edge groove (10); The left side of the right handle piece (12) is provided with a spring piece (13), the rear end of the spring piece (13) is fixedly connected to the right handle piece (12), the front end of the spring piece (13) is a movable end, the movable end of the spring piece (13) is provided with a first lock buckle (3) and a second lock buckle (4), and the side wall of the blade (2) is provided with a first buckle position (21) and a second buckle position (22). When the blade (2) is in an open state and the spring piece (13) is not subjected to an external force, the first lock buckle (3) will be driven to be buckled with the first buckle position (21), and the second lock buckle (4) will be buckled with the second buckle position (22). Pushing the movable end of the spring piece (13) to deform to the right will drive the two lock buckles to disengage from the corresponding buckle positions.

2. The folding knife according to claim 1, characterized in that: The first lock buckle (3) is a protrusion located at the left side of the movable end of the spring piece (13), and the first buckle position (21) is a first buckle groove provided on the side wall of the blade (2). When the blade (2) is in the open state and the spring piece (13) is free from external force, the protrusion is driven to be inserted into the first buckle groove.

3. The folding knife according to claim 1, characterized in that: The second buckle position (22) is a second buckle groove formed on the side wall of the blade (2). The second lock buckle (4) includes a hemispherical protrusion (40) located on the left side of the movable end of the spring piece (13). When the blade (2) is in the open state and the spring piece (13) is not subjected to external force, the hemispherical protrusion (40) is driven to be inserted into the second buckle groove.

4. The folding knife according to claim 3, characterized in that: The second lock buckle (4) further comprises an inner ring (41), an outer ring (42) and an inserting column (43), a movable end of the spring piece (13) is provided with an inserting hole (130), a convex ring (411) is provided at the left end of the inner ring (41), an annular groove (1301) is provided on the left side of the inserting hole (130), a column cap (431) is provided at the right end of the inserting column (43), an avoidance hole (121) is provided at the position of the right handle piece (12) corresponding to the second lock buckle (4), the convex ring (411) is fitted in the annular groove (1301), and the inner ring (41 ) passes through the insertion hole (130) and extends to the right side of the spring piece (13), the outer ring (42) is mounted on the outer side of the inner ring (41) corresponding to the right side of the spring piece (13), the hemispherical protrusion (40) is arranged at the left end of the plug post (43), the plug post (43) passes through the central through hole (410) of the inner ring (41) and makes the hemispherical protrusion (40) extend to the left side of the spring piece (13), the column cap (431) is located at the right side of the inner ring (41), and the diameter of the column cap (431) is larger than the diameter of the central through hole (410) of the inner ring (41).

5. The folding knife according to claim 2, characterized in that: The side wall of the blade (2) is further provided with a third buckle groove (23). When the blade (2) is in a folded state and the spring sheet (13) is not subjected to an external force, the protrusion is driven to be inserted into the third buckle groove (23). When the movable end of the spring sheet (13) is pushed to the right and deformed, the protrusion is driven to be separated from the third buckle groove (23).

6. The folding knife according to claim 1, characterized in that: The first buckle position (21), the second buckle position (22) and the rotation axis of the blade (2) form a triangular structure.

7. The folding knife according to any one of claims 1 to 6, characterized in that: When the blade (2) is in the open state, the rear end of the blade (2) abuts against the front end of the left handle (11), and the left handle (11) is provided with an escape opening (111) at a position corresponding to the movable end of the spring (13).

8. The folding knife according to claim 7, characterized in that: The left side of the right handle piece (12) is provided with a mounting groove (120), a spacer (14) is installed in the mounting groove (120), the rear end of the spring piece (13) and the spacer (14) are an integral structure, and an avoidance groove (1201) is provided at the bottom of the mounting groove (120) corresponding to the movable end position of the spring piece (13).

9. The folding knife according to claim 8, characterized in that: The left side of the rear end of the spacer (14) is provided with a limiting protrusion (141), and the right side of the left handle (11) is provided with a limiting groove (112). The limiting protrusion (141) of the spacer (14) matches the limiting groove (112) of the left handle (11).

10. The folding knife according to claim 7, characterized in that: The upper side walls of the left handle piece (11) and the right handle piece (12) are provided with a cutting groove (5), a cutting piece (51) is provided in the cutting groove (5), and a belt clip (7) is provided on the right side of the right handle piece (12).

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