Auxiliary unlocking mechanism of folding knife and folding knife

Abstract

The utility model discloses a folding knife auxiliary unlocking mechanism and a folding knife, and belongs to the technical field of folding knives. The elastic piece is arranged on the front handle plate, one side of the elastic piece is a free end, the sliding part is installed on the front handle plate in a sliding mode, the sliding shaft is arranged on the side, close to the elastic piece, of the sliding part, a slope sliding groove is machined in the back face of the elastic piece, the sliding shaft penetrates through the slope sliding groove, and the side wall of the sliding shaft is attached to the slope face of the slope sliding groove in a sliding mode. In order to solve the problems that an existing folding knife line lock cannot stably lock a knife edge, and a folding knife main shaft unlocking mechanism is complex in structure and difficult to produce, install and maintain, on the premise that an elastic piece is used for locking, a sliding part, a sliding shaft and a slope sliding groove are additionally arranged to unlock the elastic piece, and the folding knife main shaft unlocking mechanism is simple in structure and convenient to use. A user can unlock the knife head only by pushing the sliding part when the knife head is completely unfolded, the blade is prevented from being accidentally folded, and the safety performance of the folding knife is improved.

Description

Technical Field

[0001] The utility model relates to a folding knife auxiliary unlocking mechanism and a folding knife, belonging to the technical field of folding knives. Background Art

[0002] A folding knife is a portable tool whose blade folds into the handle. Its design makes the knife safer and more portable when not in use. A wire lock is one of the most common locking mechanisms used in folding knives, locking the blade with a spring-loaded steel plate. However, if the steel plate is of poor quality or improperly designed, it can wear out prematurely and fail to securely lock the blade. The blade can accidentally fold during use, posing a serious safety hazard, especially when high pressure is applied. Therefore, to ensure the safety of folding knife locking, existing folding knives often forgo wire locks and use spindle unlocking mechanisms. Publication No. CN220972448U, for example, discloses a spindle lock and safety folding knife. However, due to the frequent opening and closing of folding knives during use, the spindle is subjected to significant rotation and pressure, which can lead to loosening or wear of the spindle. This loose spindle can cause unstable opening and closing of the blade, resulting in blade shaking during use and increasing the risk of accidental injury. Furthermore, the folding knife's complex structure makes internal deformation or fracture difficult to detect, making production, installation, and maintenance difficult.

[0003] Therefore, it is urgent to propose a new type of folding knife auxiliary unlocking mechanism and folding knife to solve the above technical problems. Utility Model Content

[0004] This utility model is developed to address the problems of existing folding knife thread locks that fail to securely lock the blade, while the spindle unlocking mechanism is complex and difficult to manufacture, install, and maintain. The following provides a brief overview of this utility model to provide a basic understanding of certain aspects of this utility model. It should be understood that this overview is not an exhaustive overview of the utility model. It is not intended to identify key or important aspects of this utility model, nor is it intended to limit the scope of this utility model.

[0005] The technical solution of this utility model:

[0006] Solution 1: A folding knife auxiliary unlocking mechanism includes a front handle plate, a spring plate, a sliding part and a sliding shaft. The front handle plate is provided with a spring plate, one side of the spring plate is a free end, the sliding part is slidably installed on the front handle plate, and a sliding shaft is provided on the side of the sliding part close to the spring plate. A sloped groove is processed on the back of the spring plate, the sliding shaft passes through the sloped groove, and the side wall of the sliding shaft slides in fit with the sloped surface of the sloped groove.

[0007] Preferably, a pressure plate is installed on the front side of the free end of the elastic sheet.

[0008] Preferably, the sliding shaft is fixedly mounted on the sliding part.

[0009] Preferably, a spring mounting groove is provided on the sliding portion, a spring is provided in the spring mounting groove, one end of the spring is fixedly connected to the bottom of the sliding groove through a connecting block, and the other end of the spring is fixedly connected to the side wall of the bottom of the spring mounting groove.

[0010] Preferably, one side of the spring is a free end, and the other side is a fixed end, and the fixed end is fixedly connected to the front handle plate or integrally formed.

[0011] Option 2: A folding knife is realized based on the folding knife auxiliary unlocking mechanism described in Option 1. In addition to the folding knife auxiliary unlocking mechanism, it also includes a cutter head, a rear handle plate and a main shaft. The front handle plate and the bottom sides of the rear handle plate are fixedly connected, the cutter head is clamped between the top sides of the front handle plate and the rear handle plate, and the bottom side of the cutter head establishes a rotational connection with the front handle plate and the rear handle plate through the main shaft. The bottom of the cutter head has a slot, and the free end of the spring is clamped in the slot.

[0012] The utility model has the following beneficial effects:

[0013] 1. This utility model uses a spring clip for locking, but also adds a sliding portion, a sliding shaft, and a sloped groove to unlock the spring clip. When the blade is fully extended, the user can only unlock it by pushing the sliding portion, preventing the blade from accidentally folding, thereby improving the safety of the folding knife.

[0014] 2. This utility model uses a single hand to push the sliding part to achieve sliding engagement between the sliding shaft and the sloped slide groove. The height difference of the slope surface drives the spring to unlock, which is particularly convenient for scenarios requiring quick operation. Single-handed operation reduces the number of operating steps, especially when one hand is occupied or a quick response is required, which can improve operating efficiency.

[0015] 3. The structure of the utility model is relatively simple. The cutter head is directly locked by the spring, without a complicated mechanical connection structure. This simple design makes the utility model rarely fail during use and is easy to maintain.

[0016] 4. The design of the present invention is ingenious and the parts composition is streamlined. The relatively small number of parts means fewer wear points and a stable structure. Therefore, even under frequent use, unlocking failure is not likely to occur, which enhances reliability. At the same time, it is easy to produce and process, reduces processing difficulty and cost, and improves production efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the auxiliary unlocking mechanism of a folding knife;

[0018] Figure 2This is a schematic diagram of the coordination of the sloped chute of the utility model when the slope surface is tilted upward;

[0019] Figure 3 This is a schematic diagram of the coordination of the sloped chute of the utility model when the slope surface is tilted downward;

[0020] Figure 4 This is a schematic diagram of the cooperation between the spring and the slide groove of the utility model;

[0021] Figure 5 It is a structural diagram of the shrapnel of the utility model;

[0022] Figure 6 It is a three-dimensional image of a folding knife.

[0023] In the figure: 1-front handle plate, 2-spring, 3-sliding part, 4-sliding shaft, 5-ramp slide, 6-pressure plate, 7-spring, 8-cutter head, 9-rear handle plate, 10-spindle, 11-slide, 21-free end, 22-fixed end, 41-spring mounting groove, 81-slot. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments illustrated in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0025] The connections mentioned in this utility model are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, bonding connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as threaded connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can always be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a hinge connection is selected for a detachable connection.

[0026] Specific implementation method 1: Combination Figures 1-6 Describing this embodiment, this embodiment is a folding knife auxiliary unlocking mechanism, including a front handle plate 1, a spring piece 2, a sliding part 3 and a sliding shaft 4. The front handle plate 1 is provided with a spring piece 2, and one side of the spring piece 2 is a free end 21. The sliding part 3 is slidably installed on the front handle plate 1, and the sliding part 3 is provided with a sliding shaft 4 on the side close to the spring piece 2. A sloped groove 5 is processed on the back of the spring piece 2, and the sliding shaft 4 passes through the sloped groove 5, and the side wall of the sliding shaft 4 slides in fit with the sloped surface 51 of the sloped groove 5.

[0027] One side of the spring piece 2 is a free end 21 , and the other side is a fixed end 22 . The fixed end 22 is fixedly connected to the front handle plate 1 or integrally formed.

[0028] The slope surface 51 has two structures: upward tilt and downward tilt. Figure 2 In the design shown, when tilted downward, the front handle plate 1 is arranged below the blade 8 of the folding knife, or is directly hinged to the lower side of the blade 8. There is a card slot 81 on the blade 8. When the blade 8 needs to be locked, the sliding part 3 is pushed downward, and the free end 21 of the spring 2 is reset and tilted toward its back, so that the free end 21 of the spring 2 is clamped in the card slot 81 at the bottom end of the blade 8, realizing the locking function of limiting the rotation of the blade 8. When the folding knife needs to be unlocked, the sliding part 3 is pushed, and the sliding shaft 4 of the sliding part 3 is driven to slide in the slope groove 5. The spring piece 2 is pulled away from the spring piece 2 through the slope height difference of the slope surface and rebounds, and moves out of the card slot 81 at the bottom end of the blade 8, and the blade 8 can rotate freely.

[0029] When the slope surface 51 is Figure 3 When the design is shown, when tilted upward, when the cutter head 8 needs to be locked, the sliding part 3 is pushed upward, and the free end 21 of the spring piece 2 is reset and tilted toward its back, so that the free end 21 of the spring piece 2 is clamped in the groove 81 at the bottom end of the cutter head 8, thereby realizing the locking function of restricting the rotation of the cutter head 8. When the folding knife needs to be unlocked, the sliding part 3 is pushed, and the sliding shaft 4 of the sliding part 3 is driven to slide in the slope groove 5. The spring piece 2 is pulled away from the slope height difference of the slope surface, and the spring piece 2 rebounds and moves out of the groove 81 at the bottom end of the cutter head 8, so that the cutter head 8 can rotate freely.

[0030] Specific implementation method 2: Combination Figures 1-6 To describe this embodiment, a folding tool auxiliary unlocking mechanism of this embodiment is realized based on a folding tool auxiliary unlocking mechanism described in the specific embodiment 1. In this embodiment, a folding tool auxiliary unlocking mechanism, the sliding shaft 4 is fixedly installed on the sliding part 3.

[0031] When the operator pushes the sliding part 3 upward with one hand, the sliding part 3 drives the sliding shaft 4 to slide synchronously in the sloped groove 5. Due to the height difference of the inclined surface of the sloped groove 5, the free end 21 gradually flips outward with the fixed end 22 as the rotation center, and the free end 21 away from the spring piece 2 rebounds and moves out of the slot 81 at the bottom end of the cutter head 8, so that the cutter head 8 can rotate freely.

[0032] Specific implementation method three: Combination Figures 1-6This embodiment describes a folding knife auxiliary unlocking mechanism. This embodiment is based on the folding knife auxiliary unlocking mechanism described in the second embodiment. In this embodiment, a pressure plate 6 is installed in front of the free end 21 of the spring piece 2. The pressure plate 6 acts as a weight to press down the spring piece 2, so that the free end 21 can remain locked in the locking slot 81 under the pressure of the gravity of the pressure plate 6. The purpose of this design is to not only rely on the elastic properties of the free end 21 of the spring piece 2 to achieve the locking and ejection, but also to avoid fatigue of the spring piece 2 caused by long-term use, weakening or even deformation of the elastic capacity of locking and resetting, resulting in the unlocking mechanism being stuck or even stuck and unable to achieve the unlocking function, thereby extending the service life of the spring piece 2.

[0033] Specific implementation method four: Combination Figures 1-6 To describe this embodiment, a folding tool auxiliary unlocking mechanism of this embodiment is realized based on a folding tool auxiliary unlocking mechanism described in the second specific embodiment. A folding tool auxiliary unlocking mechanism of this embodiment, the front handle plate 1 is processed with a slide groove 11, and the sliding part 3 is slidably arranged inside the slide groove 11, and the slide groove limits the sliding installation position of the sliding part 3 on the front handle plate 1.

[0034] A spring mounting groove 41 is provided on the sliding portion 3, and a spring 7 is provided in the spring mounting groove 41. One end of the spring 7 is fixedly connected to the bottom of the slide groove 11 through a connecting block 71, and the other end of the spring 7 is fixedly connected to the bottom side wall of the spring mounting groove 41. The setting of the spring 7 enables the sliding portion 3 to always remain in the reset state at the top of the slide groove 11 after the operator releases his hand, which is more convenient for one-handed operation and enhances the safety locking performance.

[0035] Specific implementation method five: Combination Figures 1-6 Explanation of this embodiment: A folding knife in this embodiment is realized by relying on a folding knife auxiliary unlocking mechanism described in any one of the specific embodiments one to four. In addition to the folding knife auxiliary unlocking mechanism, it also includes a cutter head 8, a rear handle plate 9 and a spindle 10. The bottom sides of the front handle plate 1 and the rear handle plate 9 are fixedly connected by a connecting block, so that a chamber for accommodating the folding and retraction of the cutter head 8 is provided between the front handle plate 1 and the rear handle plate 9. The cutter head 8 is clamped between the top sides of the front handle plate 1 and the rear handle plate 9, and the bottom side of the cutter head 8 is connected by the spindle 10. 0 establishes a rotational connection with the front handle plate 1 and the rear handle plate 9, that is, when the cutter head 8 is rotated along the main shaft 10 to retract, the cutter head 8 can be set in the chamber, and the cutter head 8 has a card slot 81 at the bottom. The cutter head 8 is locked and unlocked by cooperating with the bottom card slot 81 and the folding tool auxiliary unlocking mechanism, that is, when locked, the free end 21 of the spring piece 2 of the folding tool auxiliary unlocking mechanism is clamped in the card slot 81, and the cutter head 8 is in a locked state. When unlocked, the free end 21 of the spring piece 2 pops out of the card slot 81, and the cutter head 8 can rotate freely along the main shaft 10.

[0036] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutations and combinations one by one, but it should be understood that the technical solutions after permutations and combinations have been disclosed by the present invention.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A folding knife auxiliary unlocking mechanism, characterized by: The invention comprises a front handle plate (1), a spring piece (2), a sliding part (3) and a sliding shaft (4); the front handle plate (1) is provided with a spring piece (2), one side of the spring piece (2) is a free end (21); the sliding part (3) is slidably mounted on the front handle plate (1); and a sliding shaft (4) is provided on a side of the sliding part (3) close to the spring piece (2); a sloped slide groove (5) is processed on the back side of the spring piece (2); the sliding shaft (4) passes through the sloped slide groove (5), and the side wall of the sliding shaft (4) is slidably fitted with the slope surface (51) of the sloped slide groove (5).

2. The folding knife auxiliary unlocking mechanism according to claim 1, characterized in that: A pressing plate (6) is installed on the front side of the free end (21) of the elastic piece (2).

3. The folding knife auxiliary unlocking mechanism according to claim 2, characterized in that: The sliding shaft (4) is fixedly mounted on the sliding part (3).

4. The folding knife auxiliary unlocking mechanism according to claim 2, characterized in that: A sliding groove (11) is machined on the front side of the front handle plate (1), and the sliding portion (3) is slidably arranged inside the sliding groove (11).

5. The folding knife auxiliary unlocking mechanism according to claim 4, characterized in that: The sliding portion (3) is provided with a spring installation groove (41), and a spring (7) is provided in the spring installation groove (41). One end of the spring (7) is fixedly connected to the bottom of the sliding groove (11) through a connecting block (71), and the other end of the spring (7) is fixedly connected to the side wall of the bottom of the spring installation groove (41).

6. The folding knife auxiliary unlocking mechanism according to claim 1, characterized in that: One side of the spring piece (2) is a free end (21), and the other side is a fixed end (22), and the fixed end (22) is fixedly connected to the front handle plate (1) or integrally formed.

7. A folding knife, which is realized by relying on the folding knife auxiliary unlocking mechanism according to any one of claims 1 to 6, characterized in that: In addition to the auxiliary unlocking mechanism of the folding tool, it also includes a cutter head (8), a rear handle plate (9) and a main shaft (10), the front handle plate (1) and the bottom side of the rear handle plate (9) are fixedly connected, the cutter head (8) is clamped between the top sides of the front handle plate (1) and the rear handle plate (9), and the bottom side of the cutter head (8) is connected to the front handle plate (1) and the rear handle plate (9) through the main shaft (10), the bottom of the cutter head (8) has a slot (81), and the free end (21) of the spring piece (2) is clamped in the slot (81).

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