Folding knife unlocking device and folding knife

Abstract

The utility model discloses a folding knife unlocking device and a folding knife, and belongs to the technical field of folding knives. The sliding part is slidably mounted on the front side of a front plate, through grooves are formed in the sliding part and the front plate, the top of the first pressing part is rotatably connected with the side wall of the through groove in the sliding part, the bottom of the second pressing part is slidably connected with the front plate, and the bottom of the first pressing part is hinged to the top of the second pressing part. The folding knife line lock solves 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, the structure is relatively simple, a knife head is directly locked through the elastic piece, no complex mechanical connecting structure exists, and the structure is simple. In the using process, faults are few, and meanwhile maintenance is easy.

Description

Technical Field

[0001] The utility model relates to a folding knife unlocking device 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 folding knife unlocking device and folding knife to solve the above technical problems. Utility Model Content

[0004] This utility model is developed to address the complex structure of the spindle unlocking mechanism of a folding knife. A brief overview of the utility model is provided below to provide a basic understanding of certain aspects of the 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 the utility model, nor is it intended to limit the scope of the utility model.

[0005] The technical solution of this utility model:

[0006] Solution 1: A folding knife unlocking device includes a spring piece, a sliding part, a first pressing part and a second pressing part. The sliding part is slidably installed on the front side of the front plate. A through groove is provided on the sliding part and the front plate. The top of the first pressing part is rotatably connected to the side wall of the through groove on the sliding part. The bottom of the second pressing part is slidably connected to the front plate. The bottom of the first pressing part is hinged to the top of the second pressing part. The first pressing part and the second pressing part act on the spring piece to achieve unlocking.

[0007] Preferably, symmetrical sliding grooves are provided on the front side surfaces of the front plate on the left and right sides of the bottom of the through groove, and sliding shafts are provided on the left and right sides of the bottom of the second pressing portion, and the sliding shafts are slidably installed in the sliding grooves;

[0008] The left and right sides of the top of the first pressing portion are rotatably connected to the two side walls of the top of the through slot via rotating shafts respectively;

[0009] The hinge between the bottom of the first pressing portion and the top of the second pressing portion acts together on the surface of the spring to achieve unlocking;

[0010] Or the bottom of the first pressing portion presses against the surface of the spring to achieve unlocking;

[0011] Or the top of the second pressing portion presses against the surface of the spring to achieve unlocking.

[0012] Preferably, the sliding block is located on the top side of the sliding shaft.

[0013] Preferably, the front side surface of the bottom end of the second pressing portion is an arc-shaped surface or a sloped surface, and the front side surface of the bottom end is in sliding contact with the back surface of the sliding portion.

[0014] Preferably, the sliding block is located at the bottom side of the sliding shaft.

[0015] Preferably, the front side surface of the top end of the first pressing portion is an arcuate surface or a sloped surface, and the front side surface of the top end is in sliding contact with the back surface of the sliding portion.

[0016] Preferably, the front side surfaces of the front plate on the left and right sides of the through slot are provided with positioning slots, the back of the sliding portion is provided with positioning sliders, and the positioning sliders are slidably arranged in the positioning slots;

[0017] Slide blocks are provided on the left and right sides of the bottom back of the sliding part, and both slide blocks are slidably provided in the sliding groove together with the sliding shaft.

[0018] Preferably, the device further comprises a rear plate, on which a spring piece is provided, and one side of the spring piece is a free end.

[0019] Preferably, one side of the spring piece is a free end, and the other side of the spring piece is a fixed end, and the fixed end is fixedly connected to the rear plate or integrally formed.

[0020] Option 2: A folding knife, in addition to the folding knife unlocking device, also includes a blade head and a main shaft, the bottom sides of the front plate and the rear plate are fixedly connected, the blade head is clamped between the top sides of the front plate and the rear plate, and the bottom side of the blade head establishes a rotational connection with the front plate and the rear plate through the main shaft, the bottom of the blade head has a slot, and the spring piece is clamped in the slot.

[0021] The utility model has the following beneficial effects:

[0022] 1. In addition to using a spring clip for locking, this utility model also incorporates a sliding portion, a first pressing portion, and a second pressing portion to unlock the spring clip. This allows the user to unlock the blade only by pushing or pulling the sliding portion when the blade is fully extended, preventing the blade from accidentally folding and improving the safety of the folding knife.

[0023] 2. The present invention can achieve sliding engagement of the sliding portion by pushing or pulling the sliding portion with one hand. The sliding portion presses the first pressing portion or the second pressing portion, causing the hinged joint of the first pressing portion and the second pressing portion to bend toward the back. The height difference generated at the bending point presses the spring piece to move, driving the spring piece to unlock. This is particularly convenient for scenarios requiring quick operation. One-handed operation reduces the number of operating steps, especially when one hand is occupied or a quick response is required, thereby improving operating efficiency.

[0024] 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.

[0025] 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

[0026] Figure 1 This is a three-dimensional diagram of a folding knife unlocking device according to the first embodiment of the present utility model;

[0027] Figure 2 This is an exploded view of a folding knife unlocking device according to the first embodiment of the present utility model;

[0028] Figure 3 This is a schematic structural diagram of the first pressing portion and the second pressing portion according to the first embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the cooperation between the positioning chute and the positioning slider according to the first embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the cooperation between the sliding shaft and the sliding block described in the first embodiment of the present utility model.

[0031] Figure 6 This is a perspective view of a folding knife unlocking device according to the second embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the cooperation between the positioning chute and the positioning slider described in the second embodiment of the present utility model;

[0033] Figure 8 This is a schematic structural diagram of the first pressing portion and the second pressing portion according to the second embodiment of the present invention;

[0034] Figure 9 This is an exploded view of a folding knife unlocking device according to the second embodiment of the present invention;

[0035] Figure 10 It is a three-dimensional diagram of the folding knife described in the third embodiment of the present utility model;

[0036] Figure 11 It is a schematic diagram of the interference relationship between the first and second pressure parts and the surface of the spring sheet in a specific embodiment of the present utility model, wherein a is a schematic diagram of the interference relationship between the first and second pressure parts pressing against the surface of the spring sheet at the hinge, b is a schematic diagram of the interference relationship between the bottom of the first pressure part pressing against the surface of the spring sheet, and c is a schematic diagram of the interference relationship between the top of the second pressure part pressing against the surface of the spring sheet.

[0037] In the figure: 1-front plate, 2-rear plate, 3-spring, 4-sliding part, 5-first pressing part, 6-second pressing part, 7-through groove, 8-rotating shaft, 9-slide groove, 10-slide shaft, 11-slider, 12-positioning slide groove, 13-positioning slider, 31-free end, 32-fixed end, 51-top front side, 61-bottom front side, 101-cutter head, 102-spindle, 1011-slot. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] Example 1: Combination Figure 1-Figure 5 and Figure 11Describe this embodiment. A folding knife unlocking device of this embodiment includes a front plate 1, a spring piece 3, a sliding part 4, a first pressing part 5, a second pressing part 6, a rotating shaft 8 and a sliding shaft 10. The sliding part 4 is slidably installed on the front side of the front plate 1. A through groove 7 is provided on the sliding part 4 and the front plate 1. The left and right sides of the top of the first pressing part 5 are rotatably connected to the two side walls of the top of the through groove 7 through the rotating shaft 8 respectively. The front side surface of the front plate 1 located on the left and right sides of the bottom of the through groove 7 is provided with symmetrically arranged sliding grooves 9. The left and right sides of the bottom of the second pressing part 6 have sliding shafts 10. The sliding shaft 10 is slidably installed in the sliding groove 9. The bottom of the first pressing part 5 is hinged to the top of the second pressing part 6. The first pressing part 5 and the second pressing part 6 act on the spring piece 3 to achieve unlocking.

[0041] The bottom of the first pressing portion 5 and the second pressing portion 6 act together on the spring piece 3. There are various ways of action, the purpose of which is to squeeze the spring piece 3 and separate the spring piece 3 from the cutter head. Examples of the action forms are as follows:

[0042] Form 1: The hinge between the bottom of the first pressing portion 5 and the top of the second pressing portion 6 acts on the surface of the spring 3 to achieve unlocking. Figure 11 As shown in a;

[0043] Form 2: The bottom of the first pressing portion 5 presses against the surface of the spring 3 to achieve unlocking, such as Figure 11 As shown in b;

[0044] Form 3: The top of the second pressing portion 6 presses against the surface of the spring 3 to achieve unlocking, such as Figure 11 As shown in c.

[0045] The hinge between the bottom of the first pressing portion 5 and the top of the second pressing portion 6, or the bottom of the first pressing portion 5, or the top of the second pressing portion 6 presses against the surface of the spring 3. The specific contact relationship between the first pressing portion 5 and the second pressing portion 6 and the surface of the spring 3 is as follows: Figure 11 shown.

[0046] Slide blocks 11 are provided on the left and right sides of the bottom back of the sliding portion 4 , and the slide blocks 11 on both sides are slidably provided in the sliding groove 9 together with the sliding shaft 10 .

[0047] The slider 11 is located on the top side of the sliding shaft 10. The bottom front side 61 of the second pressing portion 6 is an arcuate or sloped surface, and the bottom front side 61 slides in contact with the back surface of the sliding portion 4. The bottom front side 61 of the second pressing portion 6 protrudes from the front side of the front plate 1, with a height difference between the two. The arcuate or sloped surface design facilitates sliding and pressing.

[0048] The front plate 1 is arranged below the blade head 101 of the folding knife, or is directly hinged to the lower side of the blade head 101, and the blade head 101 has a slot 1011. When the sliding part 4 is pushed or pulled upward, the through slot 7 on the sliding part 4 is staggered with the through slot 7 on the front plate 1, and the back of the sliding part 4 is in contact with the surface of the sliding part 4 and slides downward. At the same time, the back of the sliding part 4 presses against the bottom front side 61 of the second pressing part 6. Due to the height difference of the arc surface or slope surface of the bottom front side 61, the second pressing part 6 is flipped with the gradually reverse sliding shaft 10 as the rotation center. While the second pressing part 6 drives the sliding shaft 10 to flip, the sliding shaft 10 and the slider 11 also slide in the sliding groove 9, so that the end of the second pressing part 6 and the first pressing part 5 hinged together is folded toward the side close to the elastic piece 3, until the second pressing part 6 and the first pressing part 5 hinge against the elastic piece 3, so that the elastic piece 3 moves out of the slot 1011 at the bottom end of the blade head 101, and the blade head 101 can rotate freely.

[0049] The sliding portion 4 can be pushed or pulled by an operator with one hand, which reduces the difficulty of operation and the efficiency of opening, closing and unlocking.

[0050] The front side surface of the front plate 1 located on the left and right sides of the through groove 7 is provided with a positioning groove 12, and the back of the sliding part 4 is provided with a positioning slider 13. The positioning slider 13 is slidably set in the positioning groove 12. The sliding cooperation between the positioning groove 12 and the positioning slider 13 limits the sliding installation position of the sliding part 3 on the front plate 1.

[0051] The rear plate 2 is provided with an elastic piece 3 , and one side of the elastic piece 3 is a free end 31 .

[0052] One side of the spring piece 3 is a free end 31, and the other side of the spring piece 3 is a fixed end 32. The fixed end 32 is fixedly connected to the back plate 2 or integrally formed, which is convenient for positioning and installing the spring piece 3 on the folding knife.

[0053] Example 2: Combination Figure 6-Figure 9 and Figure 11 1 and 10. The folding knife unlocking device of this embodiment is described in detail. The folding knife unlocking device of this embodiment includes a front plate 1, a spring piece 3, a sliding part 4, a first pressing part 5, a second pressing part 6, a rotating shaft 8 and a sliding shaft 10. The front plate 1 is arranged in front of the spring piece 3, and the sliding part 4 is slidably installed on the front side of the front plate 1. A through slot 7 is provided on the sliding part 4 and the front plate 1. The left and right sides of the top of the first pressing part 5 are rotatably connected to the two side walls of the top of the through slot 7 through the rotating shaft 8 respectively. The front side surface of the front plate 1 located on the left and right sides of the bottom of the through slot 7 is provided with symmetrically arranged sliding grooves 9. The left and right sides of the bottom of the second pressing part 6 have sliding shafts 10. The sliding shaft 10 is slidably installed in the sliding grooves 9. The bottom of the first pressing part 5 is hinged to the top of the second pressing part 6, and the hinged joint between the bottom of the first pressing part 5 and the top of the second pressing part 6, or the bottom of the first pressing part 5, or the top of the second pressing part 6 presses against the surface of the spring piece 3. The specific contact relationship between the first pressing part 5 and the second pressing part 6 and the surface of the spring piece 3 is as follows Figure 11 shown.

[0054] Slide blocks 11 are provided on the left and right sides of the bottom back of the sliding portion 4 , and the slide blocks 11 on both sides are slidably provided in the sliding groove 9 together with the sliding shaft 10 .

[0055] The slider 11 is located on the bottom side of the sliding shaft 10. The top front side 51 of the first pressing portion 5 is an arcuate or sloped surface, and the top front side 51 slides in contact with the back surface of the sliding portion 4. The top front side 51 of the first pressing portion 5 protrudes from the front side of the front plate 1, with a height difference between the two. The arcuate or sloped surface design facilitates sliding and pressing.

[0056] The front plate 1 is arranged below the blade head 101 of the folding knife, or is directly hinged to the lower side of the blade head 101. The blade head 101 has a slot 1011. When the sliding part 4 is pushed or pulled downward, the through slot 7 on the sliding part 4 is staggered with the through slot 7 on the front plate 1. While the back of the sliding part 4 slides downward against the surface of the sliding part 4, the back of the sliding part 4 presses against the top front side surface 51 of the first pressing part 5. Due to the height difference of the arc surface or the slope surface of the top front side surface 51, the first pressing part 5 is gradually pressed. The gradually reverse rotating shaft 8 is flipped as the rotation center. Due to the hinge of the first pressing part 5 and the second pressing part 6, the end of the second pressing part 6 hinged to the first pressing part 5 is folded toward the side close to the spring piece 3 until the second pressing part 6 and the first pressing part 5 are hinged to press the spring piece 3, so that the spring piece 3 moves out of the slot 1011 at the bottom end of the cutter head 101, and the cutter head 101 can rotate freely. In the above process, while the second pressing part 6 drives the sliding shaft 10 to flip, the sliding shaft 10 and the slider 11 are still sliding in the slide groove 9.

[0057] The sliding portion 4 can be pushed or pulled by an operator with one hand, which reduces the difficulty of operation and the efficiency of opening, closing and unlocking.

[0058] The front side surface of the front plate 1 located on the left and right sides of the through groove 7 is provided with a positioning groove 12, and the back of the sliding part 4 is provided with a positioning slider 13. The positioning slider 13 is slidably set in the positioning groove 12. The sliding cooperation between the positioning groove 12 and the positioning slider 13 limits the sliding installation position of the sliding part 3 on the front plate 1.

[0059] The rear plate 2 is provided with an elastic piece 3 , and one side of the elastic piece 3 is a free end 31 .

[0060] One side of the spring piece 3 is a free end 31, and the other side of the spring piece 3 is a fixed end 32. The fixed end 32 is fixedly connected to the back plate 2 or integrally formed, which is convenient for positioning and installing the spring piece 3 on the folding knife.

[0061] Example 3: Combination Figures 1-11The present embodiment describes a folding knife of the present embodiment. In addition to the folding knife unlocking device described in any one of the first or second embodiments, it also includes a blade head 101 and a spindle 102. The front plate 1 is arranged in front of the spring piece 3. The bottom sides of the front plate 1 and the rear plate 2 are fixedly connected by a connecting block, so that a chamber for accommodating the folding and retracting of the blade head 101 is provided between the front plate 1 and the rear plate 2. The blade head 101 is clamped between the top sides of the front plate 1 and the rear plate 2, and the bottom side of the blade head 101 establishes a rotation with the front plate 1 and the rear plate 2 through the spindle 102. Dynamic connection, that is, when the cutter head 101 is rotated along the main shaft 102 to retract, the cutter head 101 can be set in the chamber, and the cutter head 101 has a card slot 1011 at the bottom. The cutter head 101 is locked and unlocked by cooperating with the bottom card slot 1011 and the folding knife unlocking device, that is, when locked, the free end 31 of the spring piece 3 of the folding knife unlocking device is clamped in the card slot 1011, and the cutter head 101 is in a locked state. When unlocked, the free end 31 of the spring piece 3 pops out of the card slot 1011, and the cutter head 101 can rotate freely along the main shaft 102.

[0062] 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.

[0063] 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 unlocking device, characterized by: The invention comprises a spring piece (3), a sliding part (4), a first pressing part (5) and a second pressing part (6); the sliding part (4) is slidably mounted on the front side of the front plate (1); a through slot (7) is provided on the sliding part (4) and the front plate (1); the top of the first pressing part (5) is rotatably connected to the side wall of the through slot (7) on the sliding part (4); the bottom of the second pressing part (6) is slidably connected to the front plate (1); the bottom of the first pressing part (5) is hinged to the top of the second pressing part (6); the first pressing part (5) and the second pressing part (6) act on the spring piece (3) to realize unlocking.

2. A folding knife unlocking device according to claim 1, characterized in that: A symmetrically arranged sliding groove (9) is provided on the front side of the front plate (1) located on the left and right sides of the bottom of the through groove (7); a sliding shaft (10) is provided on the left and right sides of the bottom of the second pressing portion (6); and the sliding shaft (10) is slidably installed in the sliding groove (9); a sliding block (11) is provided on the left and right sides of the bottom back of the sliding portion (4); and both sliding blocks (11) are slidably arranged in the sliding groove (9) together with the sliding shaft (10); The left and right sides of the top of the first pressing portion (5) are rotatably connected to the two side walls of the top of the through slot (7) via a rotating shaft (8) respectively; The hinged joint between the bottom of the first pressing portion (5) and the top of the second pressing portion (6) acts together on the surface of the spring (3) to achieve unlocking; Or the bottom of the first pressing portion (5) presses against the surface of the spring (3) to achieve unlocking; Or the top of the second pressing portion (6) presses against the surface of the spring piece (3) to achieve unlocking.

3. A folding knife unlocking device according to claim 2, characterized in that: The sliding block (11) is located on the top side of the sliding shaft (10).

4. A folding knife unlocking device according to claim 3, characterized in that: The front side surface (61) of the bottom end of the second pressing portion (6) is an arcuate surface or a sloped surface, and the front side surface (61) of the bottom end is in sliding contact with the back surface of the sliding portion (4).

5. The folding knife unlocking device according to claim 2, characterized in that: The sliding block (11) is located on the bottom side of the sliding shaft (10).

6. The folding knife unlocking device according to claim 5, characterized in that: The top front side surface (51) of the first pressing portion (5) is an arcuate surface or a sloped surface, and the top front side surface (51) is in sliding contact with the back surface of the sliding portion (4).

7. The folding knife unlocking device according to claim 1, characterized in that: Positioning slots (12) are provided on the front side of the front plate (1) on the left and right sides of the through slot (7), and a positioning slider (13) is provided on the back of the sliding portion (4), and the positioning slider (13) is slidably arranged in the positioning slots (12); Slide blocks (11) are provided on the left and right sides of the bottom back of the sliding portion (4), and both slide blocks (11) are slidably provided in the sliding groove (9) together with the sliding shaft (10).

8. A folding knife unlocking device according to any one of claims 1 to 7, characterized in that: It also includes a rear plate (2), on which a spring piece (3) is provided, and one side of the spring piece (3) is a free end (31).

9. The folding knife unlocking device according to claim 8, characterized in that: One side of the spring piece (3) is a free end (31), and the other side of the spring piece (3) is a fixed end (32). The fixed end (32) is fixedly connected to the rear plate (2) or is integrally formed.

10. A folding knife, characterized in that: In addition to the folding knife unlocking device described in claim 8, it also includes a blade head (101) and a main shaft (102), the bottom sides of the front plate (1) and the rear plate (2) are fixedly connected, the blade head (101) is clamped between the top sides of the front plate (1) and the rear plate (2), and the bottom side of the blade head (101) establishes a rotational connection with the front plate (1) and the rear plate (2) through the main shaft (102), and the bottom of the blade head (101) has a slot (1011), and the spring piece (3) is clamped in the slot (1011).

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