A folding knife

Abstract

The utility model discloses a folding knife, including the handle, the front end of handle is hinged with a blade through the hinge screw, the upper and lower sides of handle all are installed with an outer patch, the upper and lower sides of handle all are installed with an unlocking push block, the unlocking push block is connected with a locking shaft, the blade is equipped with the opening locking groove and the closed locking groove corresponding with the locking shaft. The utility model uses stably, because the unlocking push block is between the handle and the outer patch, the horizontal swing of unlocking push block is limited, makes unlocking push block always parallel to the handle, and can reciprocate in the range of stroke, and then also limit the locking shaft and the blade always keep vertical, compared with the traditional shaft lock cutter not having the vertical limit setting of shaft lock cutter, unlocking is more smooth, and can more easily realize the pushing unilaterally slider and can complete the unlocking operation, because the contact of the blade and the locking shaft is the locking state, and the locking effect after the abrasion compensation of actual use will be more reliable and safe.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically to a folding knife with a shaft lock structure. Background Technology

[0002] Folding knives are portable cutting tools widely used in daily life due to their deformability and ease of storage. When not in use, they fold up for safe storage, with the blade concealed in the handle, ensuring safe access and preventing cuts. Folding knives typically feature a locking mechanism to prevent the blade from opening and closing unnecessarily, thus preventing injury from accidental opening when closed, especially in situations where users are likely to reach for items blindly. However, existing shaft-lock folding knives often have the locking shaft in frequent contact with the blade, leading to wear and tear. This wear and tear, over time, weakens the locking mechanism and increases the risk of the blade "nodding" (a point where it nods at the handle), severely impacting the user experience. Furthermore, the lack of vertical restraint between the unlocking shaft and the handle results in a less smooth operation, often requiring manual application of force from both sides to unlock, leading to unsatisfactory performance. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a folding knife that is stable to use and has a good operating feel.

[0004] This utility model is achieved through the following technical solution:

[0005] A folding knife includes a handle, a blade hinged to the front end of the handle by a hinge screw, an outer patch mounted on both the upper and lower sides of the handle, an unlocking push block mounted on both the upper and lower sides of the handle, a locking shaft connected between the unlocking push blocks, the blade having an opening locking groove and a closing locking groove corresponding to the locking shaft, and sliding balls mounted on both the upper and lower sides of the unlocking push blocks, which are respectively rotatably connected to the outer patch and the handle.

[0006] Furthermore, a tension spring is connected to the rear end of the unlocking push block, with one end of the tension spring connected to the rear end of the unlocking push block and the other end of the tension spring connected to the rear end of the knife handle.

[0007] Furthermore, the rear end of the unlocking push block is provided with a mounting hole for mounting one end of the tension spring, and the rear end of the knife handle is provided with a connecting screw for mounting the other end of the tension spring.

[0008] Furthermore, the tool holder is equipped with a cylindrical guide post, and the blade is provided with an arc-shaped guide groove corresponding to the cylindrical guide post.

[0009] Furthermore, the unlocking push block is provided with an elongated groove, and the knife handle is equipped with a sliding column corresponding to the elongated groove.

[0010] Furthermore, the unlocking push block is provided with an elongated rolling groove for the sliding ball to roll and connect.

[0011] Furthermore, a washer and a connecting ring are provided at the connection between the outer patch and the blade. The washer and the connecting ring are sleeved on the outside of the hinge screw, and the connecting ring is equipped with a ball bearing that is tactilely connected to the blade.

[0012] Furthermore, the unlocking push block is provided with an operating protrusion, and the operating protrusion is provided with several anti-slip textures.

[0013] Furthermore, the knife handle is equipped with a hook.

[0014] Furthermore, the blade is provided with an opening and closing operation groove.

[0015] Compared to existing technologies, this invention features a locking shaft connected between the unlocking push blocks. The blade has an opening locking groove and a closing locking groove corresponding to the locking shaft. Sliding balls are installed on both the upper and lower sides of the unlocking push block, respectively rollingly connected to the outer plate and the tool holder. Because the unlocking push block is positioned between the tool holder and the outer plate, its horizontal travel is limited, ensuring it remains parallel to the tool holder and can reciprocate within its stroke range. This also limits the perpendicularity between the locking shaft and the blade. Compared to traditional shaft-locked tools that lack vertical limitation, unlocking is smoother, less prone to jamming, and allows for easier unlocking by pushing a single slider. Furthermore, since the blade is in a locked state with the locking shaft, it inevitably experiences [something] during use. While there is some wear and tear, this patented folding knife utilizes this property to achieve a more secure and reliable locking effect after wear compensation during actual use. The reverse axis lock wears down with use, and the actual locking point is further away from the "main axis," gradually increasing the locking torque and reducing the chance of accidental locking and "nodding." Long-term use will not affect the opening and closing locking effect. Because the locking axis is connected to the unlocking push blocks on both sides, the locking axis is always perpendicular to the handle and blade. Unlocking can be performed by pushing one side of the unlocking push block. Furthermore, the presence of the sliding ball transforms the original sliding friction between the unlocking push block and the handle, and between the unlocking push block and the outer plate, into rolling friction, resulting in smoother operation and better performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the folding knife of this utility model;

[0018] Figure 2 This is an exploded view of the structure of the folding knife of this utility model;

[0019] Figure 3 This is a schematic diagram of the folding knife of this utility model when it is closed.

[0020] In the diagram: 1-Handle; 2-Blade; 3-Outer plate; 4-Unlocking push block; 5-Locking shaft; 6-Opening locking groove; 7-Closed locking groove; 8-Sliding ball; 9-Tension spring; 10-Mounting hole; 11-Connecting screw; 12-Cylindrical guide post; 13-Arc-shaped guide groove; 14-Long strip slide groove; 15-Sliding column; 16-Long strip rolling groove; 17-Washer; 18-Connecting ring; 19-Ball; 20-Operating protrusion; 21-Hook; 22-Opening / closing operating groove; 23-Hinge screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 3The present invention discloses a folding knife, including a handle 1. A blade 2 is hinged to the front end of the handle 1 by a hinge screw 23. An outer patch 3 is installed on both the upper and lower sides of the handle 1. An unlocking push block 4 is installed on both the upper and lower sides of the handle 1. A locking shaft 5 is connected between the unlocking push blocks 4. The blade 2 is provided with an opening locking groove 6 and a closing locking groove 7 corresponding to the locking shaft 5. Sliding balls 8 are installed on both the upper and lower sides of the unlocking push block 4, which are respectively tumblingly connected to the outer patch 3 and the handle 1. Because the unlocking push block 4 is located between the handle 1 and the outer plate 3, it restricts the horizontal movement of the unlocking push block 4, ensuring that the unlocking push block 4 remains parallel to the handle 1 and can reciprocate within its stroke range. This also restricts the locking shaft 5 from remaining perpendicular to the blade 2. Compared to traditional shaft-locking knives that lack vertical restriction settings, unlocking is smoother, less prone to jamming, and allows for easier unlocking by simply pushing a single slider. Furthermore, since the contact between the blade 2 and the locking shaft 5 is in a locked state, some wear is inevitable during use. However, this patented folding knife utilizes this limitation, achieving a wear-compensated locking effect during actual use. The result is more secure and safer. As the reverse axis lock wears down with use, the actual locking point is further away from the "main axis". This gradually increases the locking torque, reducing the chance of mis-locking and "nodding". After long-term use, it will not affect the opening and closing locking effect. Since the locking axis 5 is connected to the unlocking push blocks 4 on both sides, the locking axis 5 is always perpendicular to the handle 1 and the blade 2. Pushing the unlocking push block 4 on one side can unlock the blade. Moreover, due to the presence of the sliding ball 8, the original sliding friction between the unlocking push block 4 and the handle 1 and between the unlocking push block 4 and the outer plate 3 is changed to rolling friction, making the operation smoother and the performance better.

[0023] The rear end of the unlocking push block 4 is connected to a tension spring 9. One end of the tension spring 9 is connected to the rear end of the unlocking push block 4, and the other end of the tension spring 9 is connected to the rear end of the handle 1, so that the unlocking push block 4 can be stably positioned in the opening locking groove 6 or the closing locking groove 7. The pulling force is provided by the tension spring 9. Compared with the "U"-shaped spring used in conventional folding knives with similar locking structures, the stress is more dispersed and the service life is longer.

[0024] The rear end of the unlocking push block 4 is provided with a mounting hole 10 for mounting one end of the tension spring 9, and the rear end of the handle 1 is provided with a connecting screw 11 for mounting the other end of the tension spring 9, which facilitates the stable installation of the tension spring 9 and makes the release of the tension of the tension spring 9 more stable.

[0025] The handle 1 is equipped with a cylindrical guide post 12, and the blade 2 is provided with an arc-shaped guide groove 13 corresponding to the cylindrical guide post 12. The cylindrical guide post 12 slides in the arc-shaped guide groove 13, making the rotation of the blade 2 more stable.

[0026] The unlocking push block 4 is provided with a long strip groove 14, and the handle 1 is equipped with a sliding post 15 corresponding to the long strip groove 14, so that the sliding of the unlocking push block 4 is more stable.

[0027] The unlocking push block 4 is provided with a long strip-shaped rolling groove 16 for the sliding ball 8 to roll and connect, which makes the installation of the sliding ball 8 more stable and the sliding of the unlocking push block 4 smoother.

[0028] A washer 17 and a connecting ring 18 are provided at the connection between the outer patch 3 and the blade 2. The washer 17 and the connecting ring 18 are sleeved on the outside of the hinge screw 23. The connecting ring 18 is equipped with a ball bearing 19 that is in rolling connection with the blade 2, so that the rotational contact friction of the blade 2 is smaller and the rotation is smoother.

[0029] The unlocking push block 4 is provided with an operating protrusion 20, which has several anti-slip textures to improve the operational stability of the unlocking push block 4.

[0030] The handle 1 is equipped with a hook 21 for easy carrying of the folding knife.

[0031] The blade 2 is provided with an opening and closing operation groove 22, which facilitates the opening and closing of the blade 2.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding knife, characterized in that: The tool includes a handle, with a blade hinged to the front end of the handle via a hinge screw. An outer patch is mounted on both the upper and lower sides of the handle, and an unlocking push block is mounted on both the upper and lower sides of the handle. A locking shaft connects the unlocking push blocks. The blade has an opening locking groove and a closing locking groove corresponding to the locking shaft. Sliding balls that are tactilely connected to the outer patch and the handle are mounted on both the upper and lower sides of the unlocking push block.

2. The folding knife according to claim 1, characterized in that: A tension spring is connected to the rear end of the unlocking push block. One end of the tension spring is connected to the rear end of the unlocking push block, and the other end of the tension spring is connected to the rear end of the knife handle.

3. The folding knife according to claim 2, characterized in that: The rear end of the unlocking push block is provided with a mounting hole for mounting one end of the tension spring, and the rear end of the knife handle is provided with a connecting screw for mounting the other end of the tension spring.

4. The folding knife according to claim 1, characterized in that: The handle is equipped with a cylindrical guide post, and the blade is provided with an arc-shaped guide groove corresponding to the cylindrical guide post.

5. The folding knife according to claim 1, characterized in that: The unlocking push block is provided with an elongated groove, and the knife handle is equipped with a sliding column corresponding to the elongated groove.

6. The folding knife according to claim 1, characterized in that: The unlocking push block is provided with a long strip-shaped rolling groove for the sliding ball to roll and connect.

7. The folding knife according to claim 1, characterized in that: The outer patch is provided with a washer and a connecting ring at the connection point with the blade. The washer and the connecting ring are sleeved on the outside of the hinge screw. The connecting ring is equipped with a ball bearing that is tactilely connected to the blade.

8. The folding knife according to claim 1, characterized in that: The unlocking push block is provided with an operating protrusion, and the operating protrusion is provided with several anti-slip textures.

9. The folding knife according to claim 1, characterized in that: The handle is equipped with a hook.

10. The folding knife according to claim 1, characterized in that: The blade is provided with an opening and closing operation groove.

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