Folding knife

Abstract

The folding knife comprises a knife handle and a blade hinged with the knife handle, the blade can rotate relative to the knife handle to be opened and closed, a telescopic rod is arranged on the side face of the knife handle, one end of the telescopic rod is rotatably connected with the knife handle, and the other end of the telescopic rod is rotatably connected with the rear end of the blade. The telescopic rod is pushed to swing around the knife handle to drive the blade to rotate for opening and closing. When the folding knife is used, the knife handle is held by a single hand, the telescopic rod is pushed by the thumb of the hand to swing around the knife handle in a reciprocating mode, and therefore the blade can be driven to rotate to be opened and closed, the folding knife does not need to be opened and closed by two hands, and operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of cutting tool technology, and more specifically relates to a folding knife. Background Technology

[0002] Existing folding knives generally include a handle with a blade groove and a blade hinged to the end of the groove. The blade can be rotated to an open state (outside the groove) and a closed state (back inside the groove). When in use, the blade can be rotated to open and cut items; when not in use, the blade can be rotated to retract into the groove, protecting the cutting edge and preventing cuts. This ensures safety and also reduces the size of the folding knife, making it convenient to carry and store.

[0003] However, existing folding knives still have shortcomings. When operating them, one hand needs to hold the handle while the other hand operates the blade to open or close it, which is not convenient. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a folding knife that is convenient to open and close.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a folding knife, including a handle and a blade hinged to the handle, the blade being able to rotate relative to the handle to open and close, a telescopic rod being provided on the side of the handle, one end of the telescopic rod being rotatably connected to the handle, and the other end of the telescopic rod being rotatably connected to the rear end of the blade, pushing the telescopic rod to swing around the handle can drive the blade to rotate to open and close.

[0006] In the above solution, a telescopic rod is provided on the side of the handle. When in use, the handle is held with one hand and the thumb of that hand is used to push the telescopic rod to swing back and forth around the handle, thereby driving the blade to rotate to open and close. There is no need to use both hands to operate the opening and closing of the folding knife, making it convenient to operate.

[0007] Furthermore, the aforementioned telescopic rod includes an outer tube, a sliding rod disposed inside the outer tube and capable of sliding along the axial direction of the outer tube, and an elastic element for pushing the sliding rod forward. The rear end of the outer tube is rotatably connected to the tool holder, and the front end of the sliding rod extends out of the front end of the outer tube and is rotatably connected to the rear end of the blade. When the blade needs to be switched from an open to a closed state, the telescopic rod can be pushed to swing upward; when the blade needs to be switched from a closed to an open state, the telescopic rod can be pushed to swing downward. During this process, the sliding rod first slides backward a certain distance and then slides forward again under the action of the elastic element. This process completes the switch from the closed to the open state of the blade. In this way, the aforementioned structure function of the telescopic rod swinging around the tool holder can transmit the rotation of the blade to open and close. In addition, the elastic element can also prevent the sliding rod from naturally sliding backward. If the sliding rod does not naturally slide backward, the telescopic rod cannot naturally swing up and down, thereby preventing the blade from rotating naturally in the open and closed states and improving the structural stability of the blade in the open and closed states.

[0008] Furthermore, the aforementioned tool holder side is provided with a clearance groove at the position where the slide bar connects to the blade. The clearance groove can prevent the tool holder from interfering with the sliding of the slide bar.

[0009] Furthermore, the aforementioned blade has a connecting rod on its rear end side wall, which is located within a clearance groove. The slide rod has a connection port at its front end, and the connecting rod is inserted into the connection port at the front end of the slide rod, allowing the front end of the slide rod to rotate around the connecting rod, thus not affecting the normal swing of the slide rod and facilitating the assembly and disassembly of the slide rod and the connecting rod. The aforementioned connecting rod has a limiting block and a rod cap, with the front end of the slide rod positioned between the limiting block and the rod cap. The rod cap is located on the outer side of the front end of the slide rod. This allows the limiting block and the rod cap to prevent the front end of the slide rod from shifting axially along the connecting rod, ensuring the installation stability of the slide rod. The rod cap can also be used as a handle, making it easier for the thumb to push the slide rod to swing.

[0010] Furthermore, the aforementioned connecting rod is threadedly connected to the blade to facilitate the assembly and disassembly of the connecting rod and the blade. The rear end of the aforementioned outer tube is hinged to the outer side of the tool holder via a first pin, so that the outer tube can rotate around the first pin.

[0011] Furthermore, the aforementioned elastic element is a spring located inside the outer tube. The front end of the spring abuts against the sliding rod, and the rear end of the spring abuts against the outer tube. Without external force, the spring will push the sliding rod to slide forward relative to the outer tube through its own elastic force.

[0012] Furthermore, the aforementioned telescopic rod also includes a locking mechanism to restrict the sliding rod from sliding backward in the direction of the outer tube. When the sliding rod cannot slide backward, the telescopic rod cannot swing up and down, and the blade cannot rotate in the open and closed states. This ensures the structural stability of the blade in the open and closed states, making it more convenient and safer to use.

[0013] Furthermore, the aforementioned locking mechanism includes a nut fitted onto the outside of the slide rod and an external thread located on the outside of the slide rod. The nut has an internal thread that matches the external thread, and the nut can move axially along the external thread of the slide rod to abut and separate from the front end face of the outer tube. Thus, when the blade is in the open or closed state, the user can rotate the nut to move it backward along the external thread of the slide rod, causing the rear side of the nut to abut against the front end face of the outer tube. At this time, the nut will restrict the slide rod from sliding backward, thus locking the slide rod and preventing it from sliding backward, thereby locking the blade in the open and closed states. When the nut is rotated to move it forward along the external thread of the slide rod, causing the rear side of the nut to separate from the front end face of the outer tube by a certain distance, the nut will not restrict the slide rod from sliding backward, thus releasing the lock on the slide rod. At this time, the slide rod can be pushed to swing, causing the blade to rotate to open and close.

[0014] Furthermore, the aforementioned blade has a guide groove, and a guide rod is provided on the inner side of the blade holder. The guide rod is placed in the guide groove and can slide along the guide groove. When the blade rotates to the open state, the guide rod abuts against the front end of the guide groove, which can prevent the blade from rotating excessively in the opening direction and thus position the blade in the open state. When the blade rotates to the closed state, the guide rod abuts against the rear end of the guide groove, which can prevent the blade from rotating excessively in the closing direction and thus position the blade in the closed state.

[0015] Furthermore, the aforementioned knife holder includes a left shank plate, a right shank plate, and a spacer plate located at the rear end between the two shank plates. The rear end of the blade is hinged to the front end between the two shank plates via a second pin, allowing the blade to rotate around the second pin to open and close between the two shank plates. Bearings or washers are fitted on the outer side of the second pin corresponding to the positions between the blade and the two shank plates. This reduces friction between the blade and the two shank plates, making the blade rotation smoother and the opening and closing operations easier.

[0016] This utility model of a folding knife uses a telescopic rod to drive the blade to rotate and open / close, which is completely different from the opening and closing operation of traditional folding knives, and features a novel structure. In operation, simply hold the handle with one hand and use the thumb to push the rod cap upwards, causing the telescopic rod to swing upwards and rotate the blade to close. Pushing the rod cap downwards causes the telescopic rod to swing downwards and rotate the blade to open. The opening and closing operation is very convenient. Furthermore, the nut locks the sliding rod in place, preventing it from sliding backwards, ensuring the structural stability of the blade in both open and closed states, making it more convenient and safer to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the folding knife in the open state according to an embodiment of the present invention (the nut and the front end face of the slide bar are in contact).

[0018] Figure 2This is a schematic diagram of the closed state structure of the folding knife according to an embodiment of the present invention.

[0019] Figure 3 This is an exploded structural diagram of the folding knife according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the folding knife in the state where the nut and the front end face of the slide bar are separated, according to an embodiment of the present invention.

[0021] Figure 5 This is an exploded structural diagram of the telescopic rod according to an embodiment of the present utility model.

[0022] The annotations in the attached figures are explained as follows:

[0023] 1. Handle; 10. Clearance groove; 11. Left handle plate; 12. Right handle plate; 13. Spacer; 14. Guide rod; 2. Blade; 21. Connecting rod; 211. Limiting block; 212. Rod cap; 22. Guide groove; 3. Telescopic rod; 31. Outer tube; 32. Slide rod; 321. Connecting port; 322. External thread; 33. Elastic element; 4. Nut; 51. First pin; 52. Second pin; 521. Washer. Detailed Implementation

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0027] Example 1

[0028] The structure of the folding knife in this embodiment is as follows: Figures 1-5As shown, the tool includes a handle 1 and a blade 2 hinged to the handle 1. The blade 2 can rotate relative to the handle 1 to open and close. The handle 1 has a telescopic rod 3 on its side. The rear end of the telescopic rod 3 is rotatably connected to the side of the handle 1, and the front end of the telescopic rod 3 is rotatably connected to the rear end of the blade 2. Pushing the telescopic rod 3 to swing around the handle 1 can drive the blade 2 to rotate to open and close.

[0029] Specifically, the aforementioned telescopic rod 3 includes an outer tube 31, a sliding rod 32 disposed inside the outer tube 31 and capable of sliding back and forth along the axial direction of the outer tube 31, and an elastic element 33 for pushing the sliding rod 32 forward. The rear end of the outer tube 31 is rotatably connected to the side of the tool holder 1, and the front end of the sliding rod 32 extends out of the front end of the outer tube 31 and is rotatably connected to the rear end of the blade 2. The side of the tool holder 1 is provided with a clearance groove 10 corresponding to the position where the sliding rod 32 is connected to the blade 2. The clearance groove 10 can prevent the tool holder 1 from interfering with the sliding of the sliding rod 32.

[0030] like Figure 1 , 2 As shown, when the blade 2 needs to be switched from the open state to the closed state, the front end of the slide rod 32 can be pushed upward to cause the telescopic rod 3 to swing upward. During this process, the slide rod 32 first slides backward a certain distance and then slides forward under the action of the elastic element 33. This process can complete the switch of the blade from the open state to the closed state. When the blade 2 needs to be switched from the closed state to the open state, the front end of the slide rod 32 can be pushed downward to cause the telescopic rod 3 to swing downward. During this process, the slide rod 32 also first slides backward a certain distance and then slides forward under the action of the elastic element 33. This process can complete the switch of the blade 2 from the closed state to the open state.

[0031] In this embodiment, the folding knife can be operated with just one hand. The thumb of the same hand pushes the front end of the slide bar 32 upwards, causing the telescopic rod 3 to swing upwards, which in turn rotates the blade 2 to close. Conversely, pushing the front end of the slide bar 32 downwards causes the telescopic rod 3 to swing downwards, which in turn rotates the blade 2 to open. This eliminates the need for both hands to operate the folding knife, making operation more convenient. This is completely different from the traditional opening and closing operation of folding knives, featuring a novel structure. Furthermore, the elastic element 33 prevents the slide bar 32 from naturally sliding backwards and retracting. Without the slide bar 32 naturally sliding backwards, the telescopic rod 3 cannot swing up and down naturally, thus preventing the blade 2 from rotating naturally in both open and closed states, resulting in greater structural stability of the blade 2 in both open and closed states.

[0032] Example 2

[0033] This embodiment is a further improvement on the folding knife structure of Embodiment 1. The improvement lies in that, as... Figure 3 , 5As shown, the rear end side wall of the blade 2 is provided with a connecting rod 21, which is located in the clearance groove 10. The front end of the slide rod 32 is provided with a connecting port 321, which is U-shaped. The connecting rod 21 is inserted into the U-shaped connecting port 321 at the front end of the slide rod 32, so that the front end of the slide rod 32 can rotate around the connecting rod 21, thus not affecting the normal swing of the slide rod 32 and facilitating the assembly and disassembly of the slide rod 32 and the connecting rod 21. The connecting rod 21 is provided with a limiting block 211 and a rod cap 212. The front end of the slide rod 32 is positioned between the limiting block 211 and the rod cap 212, and the rod cap 212 is located outside the front end of the slide rod 32. This allows the limiting block 211 and the rod cap 212 to prevent the front end of the slide rod 32 from shifting axially along the connecting rod 21, ensuring the installation stability of the slide rod 32. The rod cap 212 can also be used as a handle, making it easier for the thumb to push the slide rod 32 to swing.

[0034] Furthermore, the aforementioned connecting rod 21 is threaded to the rear end side wall of the blade 2 to facilitate the assembly and disassembly of the connecting rod 21 and the blade 2. The rear end of the aforementioned outer tube 31 is hinged to the outer side of the handle 1 via a first pin 51, allowing the outer tube 31 to rotate around the first pin 51. The aforementioned elastic element 33 is a spring located inside the outer tube 31. The front end of the spring abuts against the rear end 32 of the sliding rod, and the rear end of the spring abuts against the bottom inner side of the outer tube 31. Without external force, the spring will push the sliding rod 32 forward relative to the outer tube 31 through its own elastic force.

[0035] As an improvement to this embodiment, for example... Figure 3 As shown, the blade 2 has an arc-shaped guide groove 22, and the inner side of the handle 1 has a guide rod 14. The guide rod 14 is placed in the guide groove 22 and can slide along the guide groove 22. Figure 1 As shown, when the blade 2 rotates to the open position, the guide rod 14 abuts against the front end of the guide groove 22. This prevents the blade 2 from rotating excessively in the opening direction, thus positioning the blade 2 in the open position; and as... Figure 2 As shown, when the blade 2 rotates to the closed state, the guide rod 14 abuts against the rear end of the guide groove 22, which can prevent the blade 2 from rotating excessively in the closing direction, so as to position the blade in the closed state.

[0036] Example 3

[0037] This embodiment is a further improvement on the folding knife structure of Embodiment 2. The improvement lies in that, as... Figure 3 , 5 As shown, the telescopic rod 3 also includes a locking mechanism to restrict the sliding rod 32 from sliding backward in the direction of the outer tube 31. When the sliding rod 32 cannot slide backward, the telescopic rod cannot swing up and down, and the blade 2 cannot rotate in the open and closed states. This ensures the structural stability of the blade 2 in the open and closed states, making it more convenient and safer to use.

[0038] Specifically, the locking mechanism includes a nut 4 fitted on the outside of the slide bar 32 and an external thread 322 provided on the outside of the slide bar 32. The nut 4 has an internal thread that matches the external thread 322. The nut 4 can move axially along the external thread of the slide bar 32 to abut against and separate from the front end face of the outer tube 31.

[0039] When using the folding knife in this embodiment, as follows: Figure 1 , 2 As shown, when the blade is in the open or closed state, the user can rotate the nut 4 to move backward along the external thread 322 of the slide rod 32, so that the rear side of the nut 4 abuts against the front end face of the outer tube 31. At this time, the nut 4 is connected to the external thread 322 and cannot slide automatically relative to the slide rod 32, thus the nut 4 will restrict the slide rod 32 from sliding backward, thereby locking the slide rod 32 and preventing it from sliding backward, thus locking the blade 2 in the open and closed state.

[0040] And such Figure 4 As shown, when the nut 4 is rotated and moves forward along the external thread 322 of the slide rod 32, the rear side of the nut 4 is separated from the front end face of the outer tube 31 by a certain distance (greater than or equal to the maximum retraction distance of the slide rod 32 during the opening and closing of the blade). This allows the nut 4 to no longer restrict the slide rod 32 from sliding backward, thus releasing the lock on the slide rod 32. At this time, the front end of the slide rod 32 can be pushed to drive the telescopic rod 3 to swing, thereby driving the blade 2 to rotate to open and close.

[0041] As an improvement to this embodiment, such as Figure 3 As shown, the aforementioned knife handle 1 includes a left handle plate 11 and a right handle plate 12 arranged opposite to each other, and a spacer plate 13 located at the rear end between the two handle plates. The rear end of the blade 2 is hinged to the front end between the two handle plates via a second pin 52, so that the blade 2 can rotate around the second pin 52 to open and close between the two handle plates. In addition, bearings or washers 521 are fitted on the outer side of the second pin 52 corresponding to the positions between the blade 2 and the two handle plates. This reduces the friction between the blade 2 and the two handle plates, making the rotation of the blade 2 smoother and the opening and closing operations easier.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this 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 describe all embodiments 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, comprising a handle (1) and a blade (2) hinged to the handle (1), the blade (2) being rotatable relative to the handle (1) to open and close, characterized in that: The knife handle (1) is provided with a telescopic rod (3) on its side. One end of the telescopic rod (3) is rotatably connected to the knife handle (1), and the other end of the telescopic rod (3) is rotatably connected to the rear end of the blade (2). Pushing the telescopic rod (3) to swing around the knife handle (1) can drive the blade (2) to rotate open and close.

2. The folding knife according to claim 1, characterized in that: The telescopic rod (3) includes an outer tube (31), a slide rod (32) disposed inside the outer tube (31) and capable of sliding along the axial direction of the outer tube (31), and an elastic element (33) for pushing the slide rod (32) forward. The rear end of the outer tube (31) is rotatably connected to the knife handle (1), and the front end of the slide rod (32) extends out of the front end of the outer tube (31) and is rotatably connected to the rear end of the blade (2).

3. The folding knife according to claim 2, characterized in that: The side of the handle (1) is provided with a clearance groove (10) at the position where the slide bar (32) and the blade (2) are connected.

4. The folding knife according to claim 3, characterized in that: The blade (2) has a connecting rod (21) on its rear side wall. The connecting rod (21) is placed in the clearance groove (10). The slide rod (32) has a connection port (321) at its front end. The connecting rod (21) is inserted into the connection port (321) at the front end of the slide rod (32). The connecting rod (21) has a limiting block (211) and a rod cap (212). The front end of the slide rod (32) is positioned between the limiting block (211) and the rod cap (212). The rod cap (212) is located on the outer side of the front end of the slide rod (32).

5. The folding knife according to claim 4, characterized in that: The connecting rod (21) is threadedly connected to the blade (2), and the rear end of the outer tube (31) is hinged to the outer side of the handle (1) through the first pin (51).

6. The folding knife according to claim 2, characterized in that: The elastic element (33) is a spring installed inside the outer tube (31), with the front end of the spring abutting against the slide rod (32) and the rear end of the spring abutting against the outer tube (31).

7. The folding knife according to any one of claims 2-6, characterized in that: The telescopic rod (3) also includes a locking mechanism for limiting the sliding of the slide rod (32) in the direction of retracting the outer tube (31).

8. The folding knife according to claim 7, characterized in that: The locking mechanism includes a nut (4) fitted on the outside of the slide rod (32) and an external thread (322) provided on the outside of the slide rod (32). The nut (4) has an internal thread that matches the external thread (322). The nut (4) can move axially along the external thread (322) of the slide rod (32) to abut against and separate from the front end face of the outer tube (31).

9. The folding knife according to claim 8, characterized in that: The blade (2) has a guide groove (22) at its rear end, and a guide rod (14) is provided on the inner side of the handle (1). The guide rod (14) is placed in the guide groove (22) and can slide relative to the guide groove (22). When the blade (2) is rotated to the open state, the guide rod (14) abuts against the front end of the guide groove (22). When the blade (2) is rotated to the closed state, the guide rod (14) abuts against the rear end of the guide groove (22).

10. The folding knife according to claim 8, characterized in that: The knife handle (1) includes a left handle plate (11) and a right handle plate (12) arranged opposite to each other, and a spacer plate (13) located at the rear end between the two handle plates. The rear end of the blade (2) is hinged to the front end between the two handle plates by a second pin (52), and a bearing or washer (521) is fitted on the outer side of the second pin (52) corresponding to the position between the blade (2) and the two handle plates.

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