A folding knife with a seesaw locking mechanism

Abstract

The utility model relates to folding tool technical field especially is a kind of seesaw type locking mechanism of folding tool, including two fixed housings and locking structure;Second pressing part and first pressing part are all by the holding force provided to the inside of handle from the elastic groove on first locking piece and second locking piece, and the elastic groove of second locking piece is hollowed out, so the holding force of second pressing part is to be greater than first pressing part, and second pressing part and first pressing part are linked through the movable seesaw of handle inside, because the holding force of second pressing part is greater than first pressing part, so movable seesaw is dominated by second pressing part, and first pressing part follows, when second pressing part presses down locking head, first pressing part is raised, and when unlocking head is wanted, press first pressing part, only need to give the holding force of first pressing part greater than second pressing part when finger presses first pressing part, can be unlocked the operation of head by movable seesaw and thus realize.

Description

Technical Field

[0001] This utility model relates to the field of folding knife technology, specifically a seesaw-type locking mechanism for folding knives. Background Technology

[0002] As an everyday tool, the ease of operation is crucial for folding knives, and the locking mechanism of a folding knife has a significant impact on this ease of operation.

[0003] Folding knives typically have locking mechanisms when the blade is closed and unfolded. When the blade is closed, the locking mechanism should be in a semi-locked state, allowing for quick unfolding without affecting the stability of the closed state. When the blade is unfolded, the locking mechanism should be in a fully locked state to prevent the blade from folding back and injuring the user. Furthermore, the fully locked mechanism should have a design for easy one-handed unlocking, facilitating the closure of the blade after use. Currently, many folding knives on the market prioritize ease of operation over safety and reliability in their locking mechanisms, leading to accidental activation of the unlocking device and significantly reducing the safety and reliability of the folding knife. To address these shortcomings, this invention designs a seesaw-type locking mechanism for folding knives. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a seesaw-type locking mechanism for folding knives, which has the advantages of convenient operation and high safety and reliability.

[0005] This utility model provides the following technical solution: a seesaw-type locking mechanism for a folding knife, comprising two fixed housings and a locking structure. A knife handle is fixedly installed inside the two fixed housings. Two seesaw fixing plates are fixedly installed on both sides of the outer surface of the knife handle. A movable seesaw is rotatably installed between the two seesaw fixing plates. The locking structure on both sides includes a mounting plate. A first locking piece is fixedly installed on the outer surface of the two mounting plates. A first pressing part is fixedly installed at the end of the first locking piece on both sides. A second locking piece is fixedly installed on the outer surface of the two mounting plates. A second pressing part is fixedly installed at the end of the two second pressing parts. A positioning bead is fixedly installed at the end of the two second pressing parts.

[0006] As a preferred technical solution of this utility model, the inside of the knife handle is provided with a mounting groove, and the mounting grooves on both sides are fixedly connected to the mounting plates on both sides.

[0007] As a preferred embodiment of this utility model, the end of the knife handle is hinged with a hinge part, and positioning pits are provided on both sides of the outer surface of the hinge part.

[0008] As a preferred embodiment of this utility model, the two positioning pits can be matched with positioning beads, and a cutting head is fixedly installed at the end of the hinge.

[0009] As a preferred technical solution of this utility model, the interior of the two fixed shells is provided with two sets of slots, and the locking structure can pass through the two sets of slots.

[0010] As a preferred technical solution of this utility model, the outer surfaces of the two fixed shells are fixedly installed with slots, and the two slots can be engaged with the hinge.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This folding knife features a seesaw-type locking mechanism. Through a locking structure and a seesaw fixing plate, when the blade head is closed within the handle, the positioning bead fixing the front end of the second pressing part is precisely positioned in the closing positioning pits on both sides of the hinge, achieving a closed locking. In this structure, the second pressing part primarily functions to lock the blade head, while the first pressing part primarily provides the function of pressing to unlock. Both the second and first pressing parts are supported by elastic grooves on the first and second locking plates, which provide a holding force into the handle. The elastic groove of the second locking plate has a hollow opening, so the holding force of the second pressing part is greater than that of the first pressing part. The second pressing part and the first pressing part are connected through the handle... The movable rocker arm on the side is linked. Because the holding force of the second pressing part is greater than that of the first pressing part, the movable rocker arm is led by the second pressing part, and the first pressing part moves accordingly. When the second pressing part presses down to lock the cutter head, the first pressing part lifts up. To unlock the cutter head, press the first pressing part. Simply press the first pressing part with your finger and apply a greater holding force than the second pressing part. This will lift the second pressing part through the movable rocker arm, thus unlocking the cutter head. This locking mechanism not only has high operational convenience and high safety and reliability during use, but also has a simple overall structure and principle, making it easy for tool production, processing, and daily use and maintenance. This is a seesaw-type locking mechanism for a folding knife. The blade surface has a locking groove, and the contact surface of the locking groove and the front contact surface of the second locking plate have a certain inclination. After the blade is unfolded, the two contact surfaces contact each other under the action of the stop post below the second locking plate to perform the locking function, while also realizing the locking compensation function to prevent the blade from shaking after unfolding. This folding knife has a seesaw-type locking mechanism. When the quick-opening slot of the blade head is turned by finger, the blade head can be opened instantly when the force exceeds the limit of the positioning bead's stored force. The front end of the second pressing part is pressed down into the positioning pits on both sides of the blade head to achieve the opening and locking of the blade head. Locking structures 9 are placed on both sides of the handle, which achieves a double locking effect. It does not affect the convenience of operation while greatly improving safety and reliability. This invention relates to a seesaw-type locking mechanism for folding knives. The worn parts of the locking structure are modularly designed, and new parts can be replaced after wear, reducing the cost of use and facilitating the production and daily maintenance of the knives. Attached Figure Description

[0012] Figure 1 This is an exploded view of the appearance of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a top view of the retracted cutter head structure of this utility model; Figure 4 This is a top view of the locking structure of this utility model; Figure 5 This is a schematic diagram of the locking structure of this utility model when retracted; Figure 6 This is a schematic diagram of the hinge structure of this utility model; Figure 7 This is a schematic diagram of the first pressing part of this utility model; Figure 8 This is a side view of the structure of this utility model; Figure 9 This is a side view of the retracted blade structure of this utility model; Figure 10 This is a schematic diagram of the rocker fixing plate structure of this utility model; Figure 11 This is a schematic diagram of the second pressing part of this utility model; Figure 12 This is a schematic diagram of the positioning bead structure of this utility model; Figure 13 This is a schematic diagram of the positioning pit structure of this utility model; Figure 14 This is a schematic diagram of the structure of the first locking piece of this utility model; Figure 15 This is a schematic diagram of the mounting plate structure of this utility model; Figure 16 This is a side view of the rocker fixing plate of this utility model. Figure 17 This is a side view of the movable rocker structure of this utility model.

[0013] In the diagram: 1. Fixed outer shell; 2. Empty groove; 3. Card slot; 4. Tool handle; 5. Hinge part; 51. Positioning pit; 6. Tool head; 7. Mounting groove; 8. Locking structure; 81. Mounting plate; 82. First locking piece; 83. First pressing part; 84. Second locking piece; 85. Second pressing part; 86. Positioning bead; 9. Rocker fixing plate; 91. Movable rocker. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1-17 A seesaw-type locking mechanism for a folding knife includes two fixed housings 1 and a locking structure 8. A knife handle 4 is fixedly installed inside the two fixed housings 1. Two seesaw fixing plates 9 are fixedly installed on both sides of the outer surface of the knife handle 4. A movable seesaw 91 is rotatably installed between the two seesaw fixing plates 9. The locking structure 8 includes mounting plates 81. First locking pieces 82 are fixedly installed on the outer surface of the two mounting plates 81. First pressing parts 83 are fixedly installed at the ends of the first locking pieces 82 on both sides. Second locking pieces 84 are fixedly installed on the outer surface of the two mounting plates 81. Second pressing parts 85 are fixedly installed at the ends of the two second pressing parts 84. Positioning beads 86 are fixedly installed at the ends of the two second pressing parts 85.

[0016] Please see Figures 1-10 The tool holder 4 has an internal mounting groove 7, and the mounting grooves 7 on both sides are fixedly connected to the mounting plates 81 on both sides. The end of the tool holder 4 is hinged to a hinge part 5, and the outer surface of the hinge part 5 has positioning pits 51 on both sides. The two positioning pits 51 can engage with positioning beads 86, and the end of the hinge part 5 is fixedly mounted with a tool head 6.

[0017] When the quick-release groove of the blade head 6 is moved with a finger, and the force exceeds the limit of the stored force of the positioning bead 86, the blade head 6 can be opened instantly. The front end of the second pressing part 85 is pressed down into the positioning pits 51 on both sides of the blade head 6, realizing the opening and locking of the blade head 6. Locking structures 8 are placed on both sides of the handle 4, thus achieving a double locking effect, which greatly improves safety and reliability without affecting the convenience of operation.

[0018] Please see Figures 1-5 The interior of the two fixed housings 1 has two sets of slots 2, through which the locking structure 8 can pass. The outer surfaces of the two fixed housings 1 are fixedly mounted with slots 3, which can engage with the hinge part 5.

[0019] The worn parts of locking structure 8 are modularly designed, and new parts can be replaced after wear, which reduces the cost of use and facilitates tool production and daily maintenance by users.

[0020] Working principle: When the seesaw-type locking mechanism of a folding knife is used, firstly, when the blade head 6 is closed inside the handle 4, the positioning bead 86 fixing the front end of the second pressing part 85 is precisely positioned in the closing positioning pits 51 on both sides of the hinge part 5, realizing the closing and locking. In this structure, the second pressing part 85 mainly realizes the function of locking the blade head 6, and the first pressing part 83 mainly provides the function of pressing to unlock. Both the second pressing part 85 and the first pressing part 83 are provided with the holding force into the handle 4 by the elastic grooves on the first locking plate 82 and the second locking plate 84. The elastic groove of the second locking plate 84 has a hollow opening, so the holding force of the second pressing part 85 is greater than that of the first locking part 84. The first pressing part 83 has a second pressing part 85 that is linked to the first pressing part 83 via a movable rocker 91 on the inner side of the handle 4. Because the holding force of the second pressing part 85 is greater than that of the first pressing part 83, the movable rocker 91 is led by the second pressing part 85, and the first pressing part 83 moves accordingly. When the second pressing part 85 presses down to lock the blade head 6, the first pressing part 83 is lifted up. To unlock the blade head 6, press the first pressing part 83. Just press the first pressing part 83 with your finger and give it a holding force greater than that of the second pressing part 85. Then the movable rocker 91 can lift the second pressing part 85, thereby unlocking the blade head 6.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seesaw-type locking mechanism for a folding knife, comprising two fixed housings (1) and a locking structure (8), characterized in that: A knife handle (4) is fixedly installed inside the two fixed outer shells (1). Two rocker fixing plates (9) are fixedly installed on both sides of the outer surface of the knife handle (4). A movable rocker (91) is rotatably installed between the two rocker fixing plates (9). The locking structure (8) on both sides includes a mounting plate (81). A first locking piece (82) is fixedly mounted on the outer surface of the two mounting plates (81). A first pressing part (83) is fixedly mounted on the end of the first locking piece (82) on both sides. A second locking piece (84) is fixedly mounted on the outer surface of the two mounting plates (81). A second pressing part (85) is fixedly mounted on the end of the two second locking pieces (84). A positioning bead (86) is fixedly mounted on the end of the two second pressing parts (85).

2. The seesaw-type locking mechanism for a folding knife according to claim 1, characterized in that: The tool holder (4) has an internal mounting groove (7), and the mounting grooves (7) on both sides are fixedly connected to the mounting plates (81) on both sides.

3. The seesaw-type locking mechanism for a folding knife according to claim 1, characterized in that: The end of the handle (4) is hinged to a hinge part (5), and positioning pits (51) are provided on both sides of the outer surface of the hinge part (5).

4. The seesaw-type locking mechanism for a folding knife according to claim 3, characterized in that: The two positioning pits (51) can engage with the positioning bead (86), and the end of the hinge (5) is fixedly mounted with a cutter head (6).

5. The seesaw-type locking mechanism for a folding knife according to claim 1, characterized in that: The two fixed housings (1) have two sets of slots (2) inside, through which the locking structure (8) can pass.

6. The seesaw-type locking mechanism for a folding knife according to claim 1, characterized in that: The two fixed outer shells (1) are fixedly installed with slots (3) on both sides of their outer surfaces, and the two slots (3) can engage with the hinge (5).

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