Folding knife with locking structure

Abstract

The utility model provides a kind of folding knife with locking structure, including handle and blade, locking device is arranged on handle, locking device includes fixed base, wedge-shaped slider and fixed upper cover, spring placing seat and first U-shaped guide block are arranged on fixed base, first spring placing groove is arranged on spring placing seat, second spring placing groove and the first U-shaped guide sliding slot matched with first U-shaped guide block are arranged on wedge-shaped slider, spring is arranged in spring placing cavity, locking column is arranged in the side of first U-shaped guide sliding slot, fixed upper cover and fixed base fixed cooperation limit wedge-shaped slider, the connecting end of blade is provided with locking slot and locking arc.The utility model limits and guides wedge-shaped slider by first U-shaped guide block, make the movement process of wedge-shaped slider more stable, locking blade by wedge-shaped slider cooperation first U-shaped guide block simultaneously, structure is simple and compact and locking effect is strong.

Description

Technical Field

[0001] This utility model relates to the field of folding knives, and in particular to a folding knife with a locking structure. Background Technology

[0002] Folding knives are widely used in daily life, kitchen operations, and outdoor adventures. Their core feature is that the blade can be folded into the handle via a pivot structure, improving portability and safety. Adding a locking mechanism to a folding knife enhances its stability and safety during use. For folding knives with a locking mechanism, when the blade is fully extended, the locking mechanism automatically pops out and locks into a fixed position, ensuring that the blade will not fold back and injure the user when cutting. For example, Chinese utility model patent CN217414087U discloses a toggle-locking folding knife. In this solution, during the blade's extended operation, the toggle-locking component provides an active safety function, preventing accidental unlocking and blade folding back to injure the user's limbs, thus improving knife safety. However, this toggle-locking component has a complex structure, is inconvenient to assemble, and the force transmission during use is complex, making it prone to malfunction, difficult to repair, and with a short service life. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model proposes a folding knife with a locking structure, which aims to solve the problems of complex structure, inconvenient assembly, easy failure and troublesome maintenance of traditional locking components.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a folding knife with a locking structure, including a handle and a blade. The handle is provided with a locking device, which includes a fixed base, a wedge-shaped slider, and a fixed top cover. The fixed base is provided with a spring placement seat and a first U-shaped guide block. The spring placement seat is provided with a first spring placement groove, and the wedge-shaped slider is provided with a second spring placement groove and a first U-shaped guide groove that cooperates with the first U-shaped guide block. The first spring placement groove and the second spring placement groove cooperate to form a completely closed spring placement cavity, and a spring is provided in the spring placement cavity. A locking post is provided on one side of the first U-shaped guide groove. The fixed top cover is fixedly engaged with the fixed base to limit the wedge-shaped slider. The connecting end of the blade is provided with a locking groove and a locking arc. When the folding knife is in the unfolded state, the locking post and the first U-shaped guide block interact to lock the locking groove, preventing the blade from rotating during use. When the folding knife is in the closed state, the top of the locking post cooperates with the locking arc to lock the blade.

[0005] Furthermore, the wedge-shaped slider is symmetrically provided with second U-shaped guide blocks on its upper and lower sides, and the fixed base and the fixed top cover are provided with second U-shaped guide grooves that cooperate with the second U-shaped guide blocks.

[0006] Based on the above, the second U-shaped guide block and the second U-shaped guide groove cooperate to guide the wedge-shaped slider, making the movement of the wedge-shaped slider more stable, reducing the occurrence of failures, and lowering the maintenance rate.

[0007] Furthermore, within the stroke of the wedge-shaped slider, the first spring placement slot and the second spring placement slot always have an overlapping engagement portion, keeping the spring placement cavity in a closed state.

[0008] Based on the above, the first spring placement slot and the second spring placement slot always have an overlapping fit, which can ensure that the wedge slider will not malfunction due to misalignment during use.

[0009] Furthermore, the tool holder includes a lower tool holder and an upper tool holder, which are fixedly connected by a fixing pin. The lower tool holder is provided with a fixing base mounting groove, and the fixing base is mounted on the lower tool holder through the fixing base mounting groove. The upper tool holder is provided with a fixing top cover mounting groove, and the fixing top cover is mounted on the upper tool holder through the fixing top cover mounting groove.

[0010] Based on the above, a mounting slot for a fixed base is provided on the lower tool holder to install a fixed base, and a mounting slot for a fixed top cover is provided on the upper tool holder to install a fixed top cover. This improves the space utilization of the tool holder and allows the tool holder to maintain a small size even after the locking device is installed.

[0011] Furthermore, one end of the fixed base and the fixed top cover is provided with a mounting hole that mates with the fixing pin, and the fixing pin passes through the mounting hole to limit the fixed base and the fixed top cover.

[0012] Furthermore, the wedge-shaped slider has anti-slip texture on the side away from the locking post.

[0013] Based on the above, the anti-slip texture can better push the wedge-shaped slider.

[0014] Furthermore, the spring holder is provided with a T-shaped countersunk hole, and the fixed cover is provided with a groove that mates with the T-shaped countersunk hole. The groove is recessed in the upper surface of the fixed cover and protrudes outward from the lower surface of the fixed cover. The groove is provided with a through hole. During the fixed engagement between the fixed cover and the fixed base, the side of the groove protruding outward from the lower surface of the fixed cover is embedded into the T-shaped countersunk hole, and a countersunk bolt passes through the through hole to engage with the T-shaped countersunk hole.

[0015] Based on the above, during the process of fixing the top cover and the base, the groove is embedded in the T-shaped countersunk hole, and the countersunk bolt is threaded through the through hole and into the T-shaped countersunk hole, which can make the fit between the top cover and the base more stable.

[0016] The fixed top cover is provided with a third U-shaped guide block. The third U-shaped guide block has the same outline size as the first U-shaped guide block. When the fixed top cover and the fixed base are fixed together, the first U-shaped guide block and the third U-shaped guide block are face to face and fit together. At the same time, they cooperate with the first U-shaped guide groove to guide the wedge-shaped slider. The height of the first U-shaped guide groove is not lower than the height of the first U-shaped guide block.

[0017] Based on the above, the third U-shaped guide block cooperates with the first U-shaped guide groove to limit the mutual positioning of the fixed upper cover and the wedge-shaped slider, thereby improving the stability of the locking device.

[0018] Furthermore, the blade is equipped with a push button.

[0019] In summary, the beneficial effects of this utility model are as follows: 1. This utility model guides the wedge-shaped slider by setting the first U-shaped guide block. During the sliding process of the wedge-shaped slider, the first U-shaped guide block slides in cooperation with the first U-shaped guide groove throughout the process, so as to realize the linear guidance of the wedge-shaped slider and make the movement process of the wedge-shaped slider more stable.

[0020] 2. This utility model forms a locking device by modularly assembling a fixed base, a wedge-shaped slider, and a fixed top cover with a spring. The structure is compact and the assembly process is more convenient. At the same time, the locking device is set as multiple detachable small parts, making the assembly design more flexible and maintenance convenient.

[0021] 3. In addition to the first U-shaped guide block and the first U-shaped guide groove for guiding, this utility model also provides a second U-shaped guide block and a second U-shaped guide groove for sliding cooperation, so as to achieve dual guidance for the wedge-shaped slider. Moreover, the second U-shaped guide block cooperates with the second U-shaped guide groove by embedding, which does not increase the overall volume of the locking device, and the structure is simple and compact. Attached Figure Description

[0022] Figure 1 This is an exploded view of a folding knife with a locking structure in its unfolded state according to this utility model; Figure 2 This is a three-dimensional structural diagram of a folding knife with a locking structure in the unfolded state (excluding the side with the fixed top cover and handle). Figure 3 This is a top view of a folding knife with a locking structure in its unfolded state (excluding the side with the fixed top cover and handle). Figure 4 This is a top view of a folding knife with a locking structure in the closed state (excluding the side with the fixed top cover and handle). Figure 5 Exploded view a of the locking device (without mounting holes on the fixed base and fixed top cover) of this utility model; Figure 6 Exploded view b of the locking device (without mounting holes on the fixed base and fixed top cover) of this utility model; Figure 7 This is a schematic diagram of the structure of the lower tool holder and locking device (with mounting holes provided on the fixed base and the fixed top cover) of this utility model; Figure 8 This is a bottom view of the upper tool holder when the fixed base and fixed top cover of this utility model do not have mounting holes. Figure 9 This is a three-dimensional structural diagram of the folding knife with locking structure described in this utility model in its unfolded state.

[0023] Reference numerals: 1 - Tool holder; 11 - Fixed base mounting slot; 12 - Lower tool holder; 13 - Upper tool holder; 14 - Fixing pin; 15 - Fixed top cover mounting slot; 2 - Blade; 21 - Locking slot; 22 - Locking arc; 23 - Push button; 3 - Locking device; 31 - Fixed base; 32 - Wedge slider; 33 - Fixed top cover; 311 - Spring placement seat; 3111 - First spring placement slot; 3112 - T-shaped countersunk hole; 312 - First U-shaped guide block; 321 - Second spring placement slot; 322 - First U-shaped guide groove; 323 - Locking pin; 324 - Second U-shaped guide block; 325 - Anti-slip texture; 331 - Second U-shaped guide groove; 332 - Groove; 3321 - Through hole; 333 - Third U-shaped guide block; 34 - Spring; 35 - Mounting hole. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0025] like Figures 1 to 6As shown, a folding knife with a locking structure includes a handle 1 and a blade 2, which are rotatably connected by a pivot. A locking device 3 is provided on the handle 1. The locking device 3 includes a fixed base 31, a wedge-shaped slider 32, and a fixed top cover 33. The fixed base 31 is provided with a spring placement seat 311 and a first U-shaped guide block 312. The spring placement seat 311 is provided with a first spring placement groove 3111. The wedge-shaped slider 32 is provided with a second spring placement groove 321 and a first spring placement groove 321 that cooperates with the first U-shaped guide block 312. The U-shaped guide groove 322, the first spring placement groove 3111 and the second spring placement groove 321 cooperate to form a spring placement cavity. Within the stroke of the wedge-shaped slider 32, the first spring placement groove 3111 and the second spring placement groove 321 always have an overlapping cooperation part, keeping the spring placement cavity in a closed state. A spring 34 is provided in the spring placement cavity. A locking post 323 is provided on one side of the first U-shaped guide groove 322, and an anti-slip texture 325 is provided on the side of the wedge-shaped slider 32 away from the locking post 323. The fixed upper cover 33 is fixedly engaged with the fixed base 31 to limit the wedge-shaped slider 32. The connecting end of the blade 2 is provided with a locking groove 21 and a locking arc 22. The blade 2 is also provided with a push button 23 for easy opening of the blade 2.

[0026] like Figure 1 As shown, when the folding knife is in the unfolded state, the locking post 323 and the first U-shaped guide block 312 interact to lock the locking groove 21. The principle is as follows: when the folding knife is in the fully unfolded state, when the folding knife has a tendency to close, the lower left end of the locking groove 21 will press against the left side of the locking post 323, and at the same time, the first U-shaped guide block 312 will press against the right side of the locking post 323, so that the blade 2 cannot close. To close the blade 2, the wedge slider 32 needs to be manually pushed down. When the folding knife has a tendency to open further, the lower right end of the locking groove 21 will press against the right side of the first U-shaped guide block 312 to prevent the blade 2 from opening further. like Figure 4 As shown, when the folding knife is in the closed state, the spring 34 in the spring placement cavity is in the compressed state. Under the action of the spring force of the spring 34, the top left side of the locking post 323 presses against the locking arc 22 to lock the blade 2. To unfold the blade 2, the push button 23 can be pushed directly, and the wedge slider 32 can be moved down under the action of external force.

[0027] In traditional folding knives, multiple cylindrical limiting pins are used to limit and guide the slider in the locking device 3. However, this method requires precise control of the positions of multiple cylindrical limiting pins; any deviation in position will result in the scrapping of parts. It also requires high processing precision and has high production costs. In this embodiment, only a first U-shaped guide block 312 is needed to position and guide the wedge-shaped slider 32, which is simple to process and has good performance.

[0028] The wedge-shaped slider 32 has symmetrically arranged second U-shaped guide blocks 324 on its upper and lower sides. The fixed base 31 and the fixed upper cover 33 are provided with second U-shaped guide grooves 331 that cooperate with the second U-shaped guide blocks 324. The second U-shaped guide blocks 324 and the second U-shaped guide grooves 331 cooperate with each other to guide the wedge-shaped slider 32, making the movement of the wedge-shaped slider 32 more stable, reducing the occurrence of failures, and lowering the maintenance rate.

[0029] The fixed top cover 33 is provided with a third U-shaped guide block 333. The third U-shaped guide block 333 has the same outline size as the first U-shaped guide block 312. When the fixed top cover 33 and the fixed base 31 are fixedly engaged, the first U-shaped guide block 312 and the third U-shaped guide block 333 are face to face and fit together, while guiding the wedge-shaped slider 32. The height of the first U-shaped guide groove 322 is not lower than the height of the first U-shaped guide block 312.

[0030] The tool holder 1 includes a lower tool holder 12 and an upper tool holder 13, which are fixedly connected by a fixing pin 14. The lower tool holder 12 has a fixing base mounting groove 11, through which the fixing base 31 is mounted on the lower tool holder 12. The upper tool holder 13 has a fixing top cover mounting groove 15, through which the fixing top cover 33 is mounted on the upper tool holder 13. The fixing base mounting groove 11 on the lower tool holder 12 for mounting the fixing base 31, and the fixing top cover mounting groove 15 on the upper tool holder 13 for mounting the fixing top cover 33, improves the space utilization of the tool holder 1, allowing it to maintain a small size even after the locking device 3 is installed.

[0031] One end of the fixed base 31 and the fixed top cover 33 is provided with a mounting hole 35 that cooperates with the fixing pin 14. The fixing pin 14 passes through the mounting hole 35 to limit the fixed base 31 and the fixed top cover 33, thereby improving the stability of the locking device 3 and the knife handle 1.

[0032] The spring holder 311 is provided with a T-shaped countersunk hole 3112, and the fixed cover 33 is provided with a groove 332 that mates with the T-shaped countersunk hole 3112. The groove 332 is recessed in the upper surface of the fixed cover 33 and protrudes outward from the lower surface of the fixed cover 33. The groove 332 is provided with a through hole 3321. During the fixed engagement between the fixed cover 33 and the fixed base 31, the groove 332 protrudes outward from the lower surface of the fixed cover 33 and is embedded in the T-shaped countersunk hole 3112. The countersunk bolt passes through the through hole 3321 and engages with the T-shaped countersunk hole 3112 through a threaded connection, which makes the engagement between the fixed cover 33 and the fixed base 31 more stable.

[0033] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A folding knife with a locking structure, comprising a handle (1) and a blade (2), characterized in that: A locking device (3) is provided on the handle (1). The locking device (3) includes a fixed base (31), a wedge-shaped slider (32), and a fixed top cover (33). A spring placement seat (311) and a first U-shaped guide block (312) are provided on the fixed base (31). A first spring placement groove (3111) is provided on the spring placement seat (3111). A second spring placement groove (321) and a first U-shaped guide groove (322) are provided on the wedge-shaped slider (32). The first spring placement groove (3111) and the second spring placement groove (321) cooperate with each other to form a spring placement cavity. A spring (34) is provided in the spring placement cavity. The first U-shaped guide groove (322) slides with the first U-shaped guide block (312). When the folding knife is in the open state, the wedge-shaped slider (32) slides between the first U-shaped guide block (312) and the spring placement seat (311). A locking post (323) is provided on one side of the first U-shaped guide groove (322). The fixed cover (33) and the fixed base (31) are fixedly engaged to limit the wedge-shaped slider (32). The connecting end of the blade (2) is provided with a locking groove (21) and a locking arc (22). When the folding knife is in the open state, the locking post (323) and the first U-shaped guide block (312) interact to lock the locking groove (21) to prevent the blade (2) from rotating during use. When the folding knife is in the closed state, the top of the locking post (323) and the locking arc (22) cooperate to lock the blade (2).

2. The folding knife with locking structure according to claim 1, characterized in that: The wedge-shaped slider (32) is symmetrically provided with second U-shaped guide blocks (324) on its upper and lower sides, and the fixed base (31) and the fixed top cover (33) are provided with second U-shaped guide grooves (331) that cooperate with the second U-shaped guide blocks (324).

3. The folding knife with locking structure according to claim 1, characterized in that: During the stroke of the wedge slider (32), the first spring placement groove (3111) and the second spring placement groove (321) always have an overlapping engagement portion, so that the spring placement cavity remains closed.

4. The folding knife with locking structure according to claim 1, characterized in that: The tool holder (1) includes a lower tool holder (12) and an upper tool holder (13). The upper tool holder (13) and the lower tool holder (12) are fixedly connected by a fixing pin (14). The lower tool holder (12) is provided with a fixing base mounting groove (11). The fixing base (31) is installed on the lower tool holder (12) through the fixing base mounting groove (11). The upper tool holder (13) is provided with a fixing top cover mounting groove (15). The fixing top cover (33) is installed on the upper tool holder (13) through the fixing top cover mounting groove (15).

5. The folding knife with locking structure according to claim 4, characterized in that: One end of the fixed base (31) and the fixed cover (33) is provided with a mounting hole (35) that cooperates with the fixing pin (14). The fixing pin (14) passes through the mounting hole (35) to limit the fixed base (31) and the fixed cover (33).

6. The folding knife with locking structure according to claim 1, characterized in that: The wedge-shaped slider (32) has anti-slip texture (325) on the side away from the locking post (323).

7. The folding knife with locking structure according to claim 1, characterized in that: The spring holder (311) is provided with a T-shaped countersunk hole (3112), and the fixed cover (33) is provided with a groove (332) that mates with the T-shaped countersunk hole (3112). The groove (332) is recessed in the upper surface of the fixed cover (33) and protrudes outward from the lower surface of the fixed cover (33). The groove (332) is provided with a through hole (3321). During the fixed engagement between the fixed cover (33) and the fixed base (31), the groove (332) protrudes outward from the lower surface of the fixed cover (33) and is embedded in the T-shaped countersunk hole (3112). The countersunk bolt passes through the through hole (3321) and engages with the T-shaped countersunk hole (3112) through a threaded connection.

8. The folding knife with locking structure according to claim 1, characterized in that: The fixed top cover (33) is provided with a third U-shaped guide block (333). The third U-shaped guide block (333) has the same outline size as the first U-shaped guide block (312). When the fixed top cover (33) and the fixed base (31) are fixedly engaged, the first U-shaped guide block (312) and the third U-shaped guide block (333) are face to face and cooperate with the first U-shaped guide groove (322) to guide the wedge slider (32). The height of the first U-shaped guide groove (322) is not lower than the height of the first U-shaped guide block (312).

9. The folding knife with locking structure according to claim 1, characterized in that: The blade (2) is provided with a push button (23).

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