CN215881708U

CN215881708U - Novel folding knife with locking function

Info

Publication number: CN215881708U
Application number: CN202122387153.4U
Authority: CN
Inventors: 刘向东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-22
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a novel folding knife with a locking function, which comprises a front handle, a back handle, a blade and a main shaft, wherein the front handle is connected with the back handle through a screw; the blade is fixedly connected with a hollow sliding column, the hollow sliding column penetrates through the blade, a spring is arranged in the hollow sliding column, and two ends of the spring are provided with balls; the inner surfaces of the front handle and the back handle are provided with sliding chutes correspondingly, and each sliding chute consists of an annular sliding chute and a section of linear sliding chute communicated with one end of the annular sliding chute; the starting end and the terminal end of the annular chute and the terminal end of the linear chute are provided with pits; the blade is provided with a waist-shaped hole. The utility model has simple structure, can lock the blade in the opening and closing states, effectively prevents the blade from accidentally moving, is convenient to operate and has strong practicability.

Description

Novel folding knife with locking function

Technical Field

The utility model relates to the technical field of cutters, in particular to a novel folding cutter with a locking function.

Background

To improve the stability of the knife during use and to prevent accidental rotation of the knife, it is necessary to lock the knife in the open position, and similarly, to prevent accidental opening of the knife in the closed position, it is necessary to lock the knife in the closed position. Traditional folding knife that has locking function often separately sets up to the locking structure of open mode and closed state, if adopt elasticity plectrum structure to carry out the open mode locking, adopts and ends the tool post and carry out the closed state locking, and the structure is complicated for the cutter often is heavier, and when opening and closing the cutter, needs both hands to operate.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the novel folding knife with the locking function, which is simple in structure, can be locked in the opening and closing states of the blade, effectively prevents the blade from accidentally moving, and is convenient to operate.

The technical scheme provided by the utility model is as follows:

a novel folding knife with a locking function comprises a front handle, a back handle, a blade and a main shaft; the blade is fixedly connected with a hollow sliding column, the hollow sliding column penetrates through the blade, a spring is arranged in the hollow sliding column, and two ends of the spring are provided with balls; the inner surfaces of the front handle and the back handle are provided with sliding grooves correspondingly; the sliding groove comprises a section of annular sliding groove concentric with the main shaft; the starting end and the terminal end of the annular sliding chute are respectively provided with a first pit and a second pit; when the folding knife is in a closed state, the two balls respectively abut against the first concave pits, and the balls roll in the annular sliding groove when the blade rotates around the main shaft; when the folding knife is in an opening state, the two balls respectively abut against the second concave pits.

Further, the chute further comprises a section of linear chute communicated with the terminal end of the annular chute; the straight sliding groove is parallel to the length direction of the positive handle; a third pit is arranged at the terminal of the linear sliding chute; and when the ball rolls from the second concave pit to the third concave pit, the main shaft is respectively positioned at two ends of the waist-shaped hole.

Furthermore, a plurality of fourth pits are arranged between the starting end and the terminal end of the annular sliding groove.

Further, the first pit, the second pit, the third pit and the fourth pit are all hemispherical or cylindrical.

Further, the inner sides of the front handle and the back handle are both provided with annular grooves concentric with the main shaft; the inner diameter of the annular groove is equal to the outer diameter of the main shaft; waist-shaped grooves matched with the ball bearings are formed in the two sides of the blade, and the waist-shaped grooves are concentric with the waist-shaped holes; ball bearings are arranged in the space formed by the annular groove and the waist-shaped groove on the two sides.

Further, gaskets are arranged between the ball bearing and the annular groove and between the ball bearing and the waist-shaped groove.

Furthermore, one end of the main shaft is fixedly connected with the inner surface of the positive handle; the main shaft is integrally connected with the inner surface of the positive handle in a welding or bonding way; the main shaft is provided with a cylindrical inner cavity, and threads are arranged in the inner cavity; a first through hole is formed in the center of the annular groove of the back handle; the first bolt penetrates through the first through hole and is connected with the main shaft.

Furthermore, a circular groove is formed in the center of the annular groove in the back handle; one end of the main shaft is abutted against the circular groove.

Further, the bone-setting front handle comprises a dorsal bone which is integrally connected with the inner surface of the front handle in a welding or bonding way; the back bone is provided with a groove with internal threads, the back handle is provided with a second through hole at a corresponding position, and a second bolt penetrates through the second through hole and is in threaded connection with the groove.

Further, an arc-shaped bulge part is arranged at the edge of the root part of the blade side of the blade; when the folding knife is in a closed state, the arc-shaped protruding part extends out of the front handle and the back handle.

Further, the edge of the blade edge side close to the root is provided with a concave arc.

The utility model has the following beneficial effects:

when the folding knife is opened, the spring rolls in the chute against the ball, so that the blade can be opened and closed stably. When the ball is positioned in the first concave pit, the blade is in a closed state, the first concave pit is used for limiting the movement of the ball, a certain locking function is realized, and the blade cannot be easily thrown out of the handle; when the ball is positioned in the second pit, the blade is in an open state, the second pit is used for limiting the movement of the ball, and the blade is in a temporary locking state and can be suitable for application scenes with small resistance; when the blade is pushed to move backwards, the ball is located in the third pit, the blade is in an open state, the third pit is used for limiting the movement of the ball, the groove wall of the straight sliding groove is used for limiting the hollow sliding column, and the hollow sliding column is in a locking state and can be used for an application scene with large resistance. The utility model has simple structure, can lock the blade in the opening and closing states, effectively prevents the blade from accidentally moving, is convenient to operate and has strong practicability.

Drawings

FIG. 1 is a schematic overall structure diagram of the front and back sides of the embodiment in an open state;

FIG. 2 is an exploded schematic view of an embodiment;

fig. 3 is a schematic structural diagram of the embodiment in three states of closing, temporary locking and locking after the back handle is removed.

In the figure: 1. a positive handle; 2. a back handle; 3. a blade; 4. a main shaft; 5. an annular chute; 6. a kidney-shaped hole; 7. a linear chute; 8. a first pit; 9. a second pit; 10. a third pit; 11. a fourth pit; 12. a hollow traveler; 13. a spring; 14. a ball bearing; 15. an annular groove; 16. a ball bearing; 17. a gasket; 18. a waist-shaped groove; 19. a circular groove; 20. a first bolt; 21. a dorsal bone; 22. a groove; 23. a second bolt; 24. a concave arc; 25. a first through hole; 26. a second through hole; 27. an arc-shaped protrusion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-3, a novel folding knife with locking function comprises a front handle 1, a back handle 2, a blade 3 and a main shaft 4; a hollow sliding column 12 is fixedly connected to the blade 3, the hollow sliding column 12 penetrates through the blade 3, a spring 13 is installed in the hollow sliding column 12, and two ends of the spring 13 are provided with balls 14; the inner surfaces of the front handle 1 and the back handle 2 are provided with sliding chutes correspondingly, and the sliding chutes comprise a section of annular sliding chute 5 concentric with the main shaft 4; the starting end and the terminal end of the annular chute 5 are respectively provided with a first pit 8 and a second pit 9; when the folding knife is in a closed state, the two balls 14 respectively abut against the first concave pits 8, and the balls 14 roll in the annular sliding groove 5 in the process that the blade 3 rotates around the main shaft 4; when the folding knife is in the open state, the two balls 14 respectively abut against the second concave pits 9.

When the novel folding knife with the locking function is opened, the spring 13 rolls in the sliding groove against the ball 14, so that the blade 3 can be opened and closed smoothly. When the ball 14 is positioned in the first concave pit 8, the blade 3 is in a closed state, the first concave pit 8 is used for limiting the movement of the ball 14, a certain locking function is realized, and the blade 3 cannot be easily thrown out of the handle; when the ball 14 is located in the second pit 9, the blade 3 is in an open state, the second pit 9 is used for limiting the movement of the ball 14, and the blade is in a temporary locking state and can be applied to application scenes with small resistance.

Specifically, the chute further comprises a section of linear chute 7 communicated with the terminal end of the annular chute 5; the linear sliding groove 7 is parallel to the length direction of the front handle 1; a third pit 10 is arranged at the terminal of the straight chute 7; the blade 3 is provided with a kidney-shaped hole 6, and when the ball 14 rolls from the second concave pit 9 to the third concave pit 10, the main shaft 4 is respectively positioned at two ends of the kidney-shaped hole 6. The blade 3 is pushed to move backwards, so that the ball 14 is located in the third pit 10, the third pit 10 is used for limiting the movement of the ball 14, the groove wall of the straight sliding groove 7 is used for limiting the hollow sliding column 12, and the hollow sliding column is in a locking state and can be used for application scenes with large resistance.

Specifically, a plurality of fourth concave pits 11 are further arranged between the starting end and the terminal end of the annular sliding chute 5. The fourth pocket 11 may serve as a temporary lock, allowing the blade 3 to be opened in stages.

Specifically, the first dimple 8, the second dimple 9, the third dimple 10, and the fourth dimple 11 are all hemispherical or cylindrical. Compared with a cylindrical pit, the hemispherical pit can save labor when the blade is unlocked, correspondingly, the locking force of the hemispherical pit is small, and a person skilled in the art can select the hemispherical pit as required.

Specifically, in order to reduce the friction between the blade 3 and the handle and enable the blade 3 to rotate more stably and smoothly, annular grooves 15 concentric with the main shaft 4 are formed in the inner sides of the front handle 1 and the back handle 2; the inner diameter of the annular groove 15 is equal to the outer diameter of the main shaft 4; waist-shaped grooves 18 matched with the ball bearings 16 are formed in the two sides of the blade 3, and the waist-shaped grooves 18 are concentric with the waist-shaped holes 6; ball bearings 16 are mounted in the spaces formed by the annular grooves 15 and the kidney-shaped grooves 18 on both sides.

Specifically, to reduce wear between the ball bearing 16 and the handle and tool, spacers 17 are mounted between the ball bearing 16 and the annular groove 15 and between the ball bearing 16 and the kidney groove 18.

Specifically, in order to avoid punching on the outer surface of the positive handle 1 and ensure the integrity of the positive handle 1, one end of the main shaft 4 is fixedly connected with the inner surface of the positive handle 1; the main shaft 4 is integrally connected with the inner surface of the positive handle 1 in a welding or bonding way; the main shaft 4 is provided with a cylindrical inner cavity, and threads are arranged in the inner cavity; a first through hole 25 is formed in the center of the annular groove 15 of the back handle 2; the first bolt 20 penetrates the first through hole 25 and is connected to the main shaft 4. Above-mentioned structure can eliminate to punch to handle appearance processing's restriction, provides bigger art show space for the appearance processing of handle.

Specifically, in order to facilitate positioning and installation, a circular groove 19 is formed in the center of the annular groove 15 on the back handle 2; one end of the spindle 4 abuts against the circular groove 19.

Specifically, the front handle also comprises a back bone 21, wherein the back bone 21 is integrally connected with the inner surface of the front handle 1 in a welding or bonding way; in order to improve the installation strength, a groove 22 with internal threads is formed on the dorsal rib 21, a second through hole 26 is formed in a corresponding position on the dorsal handle 2, and a second bolt 23 penetrates through the second through hole 26 and is in threaded connection with the groove 22. The dorsal rib 21 serves to connect the front handle 1 and the back handle 2, to improve the strength of the cutter, and to cover the cutting edge of the blade 3.

Specifically, in order to facilitate opening of the folding knife, the edge of the root on the blade side of the blade 3 is provided with an arc-shaped convex portion 27; when the folding knife is in the closed state, the arc-shaped projection 27 extends out of the front handle 1 and the back handle 2. When opening the knife, the arc-shaped projection 27 can be pressed by one hand, so that the blade 3 is rotated about the spindle 4, thereby opening the folding knife.

Specifically, for the convenience of holding, the edge of the blade 3 near the root is provided with a concave arc 24. In the process of opening the folding knife and the practical folding knife, fingers can be placed on the concave arc 24 and abut against the concave arc, and operation is convenient.

The working principle of the utility model is as follows:

when the folding knife is in a closed state, the spring 13 is clamped in the first concave pit 8 against the ball 14, the first concave pit 8 is used for limiting the movement of the ball 14, a certain locking function is achieved, and the blade 3 cannot be easily thrown out of the handle. When it is desired to open the folding knife, the arc-shaped projection 27 is pressed with one hand, causing the ball 14 to roll out of the first recess 8 and in the annular slide groove 5, so that the blade 3 rotates about the main shaft 4, thereby opening the folding knife smoothly. When the blade 3 is opened, the ball 14 rolls into the second concave pit 9, the second concave pit 9 is used for limiting the movement of the ball 14, and the blade is in a temporary locking state and can be suitable for application scenes with small resistance; the blade 3 is pushed to move towards the third pit 10, so that the ball 14 rolls into the third pit 10, the third pit 10 is used for limiting the movement of the ball 14, the groove wall of the linear sliding groove 7 is used for limiting the hollow sliding column 12, and the hollow sliding column is in a locking state and can be used for application scenes with large resistance.

When the folding knife needs to be closed, the blade 3 is pulled to move towards the second concave pit 9, so that the ball 14 rolls into the second concave pit 9, the blade 3 is controlled to rotate around the main shaft 4, the ball 14 rolls in the annular sliding groove 5 until the ball rolls into the first concave pit 8, and the closing of the blade 3 is completed.

The person skilled in the art can set the suitable opening and closing angle of the blade according to the shape of the knife and the actual requirement, and then determine the angle of the annular chute.

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

Claims

1. A novel folding knife with a locking function comprises a front handle (1), a back handle (2), a blade (3) and a main shaft (4); the method is characterized in that: a hollow sliding column (12) is fixedly connected to the blade (3), the hollow sliding column (12) penetrates through the blade (3), a spring (13) is installed in the hollow sliding column (12), and two ends of the spring (13) are provided with balls (14); the inner surfaces of the front handle (1) and the back handle (2) are provided with sliding grooves correspondingly; the sliding groove comprises a section of annular sliding groove (5) concentric with the main shaft (4); the starting end and the terminal end of the annular chute (5) are respectively provided with a first pit (8) and a second pit (9); when the folding knife is in a closed state, the two balls (14) respectively abut against the first concave pits (8), and the balls (14) roll in the annular sliding groove (5) in the process that the blade (3) rotates around the main shaft (4); when the folding knife is in an opening state, the two balls (14) respectively abut against the second concave pits (9).

2. The new folding knife with locking function according to claim 1, characterized in that: the chute also comprises a section of linear chute (7) communicated with the terminal end of the annular chute (5); the linear sliding groove (7) is parallel to the length direction of the positive handle (1); a third pit (10) is arranged at the terminal of the straight chute (7); waist-shaped holes (6) are formed in the blades (3), and when the balls (14) roll into the third concave pits (10) from the second concave pits (9), the main shafts (4) are located at two ends of the waist-shaped holes (6) respectively.

3. The new folding knife with locking function according to claim 2, characterized in that: a plurality of fourth pits (11) are also arranged between the starting end and the terminal end of the annular sliding chute (5).

4. The new folding knife with locking function according to claim 3, characterized in that: the first pit (8), the second pit (9), the third pit (10) and the fourth pit (11) are all hemispherical or cylindrical.

5. The new folding knife with locking function according to any of claims 1 to 4, characterized in that: the inner sides of the front handle (1) and the back handle (2) are both provided with annular grooves (15) concentric with the main shaft (4); the inner diameter of the annular groove (15) is equal to the outer diameter of the main shaft (4); waist-shaped grooves (18) matched with the ball bearings (16) are formed in the two sides of the blade (3), and the waist-shaped grooves (18) are concentric with the waist-shaped holes (6); ball bearings (16) are arranged in the spaces formed by the annular grooves (15) and the waist-shaped grooves (18) on the two sides.

6. The new folding knife with locking function according to claim 5, characterized in that: gaskets (17) are arranged between the ball bearing (16) and the annular groove (15) and between the ball bearing (16) and the waist-shaped groove (18).

7. The new folding knife with locking function according to claim 6, characterized in that: one end of the main shaft (4) is fixedly connected with the inner surface of the positive handle (1); the main shaft (4) is integrally connected with the inner surface of the positive handle (1) in a welding or bonding way; the main shaft (4) is provided with a cylindrical inner cavity, and threads are arranged in the inner cavity; a first through hole (25) is formed in the center of the annular groove (15) of the back handle (2); the first bolt (20) penetrates through the first through hole (25) and is connected with the main shaft (4).

8. The new folding knife with locking function according to claim 7, characterized in that: a circular groove (19) is formed in the center of the annular groove (15) in the back handle (2); one end of the main shaft (4) is abutted against the circular groove (19).

9. The new folding knife with locking function according to claim 8, characterized in that: the front handle is characterized by further comprising a back bone (21), wherein the back bone (21) is integrally connected with the inner surface of the front handle (1) in a welding or bonding mode; the back bone (21) is provided with a groove (22) with internal threads, the back handle (2) is provided with a second through hole (26) at a corresponding position, and a second bolt (23) penetrates through the second through hole (26) and is in threaded connection with the groove (22).

10. The new folding knife with locking function according to claim 1, characterized in that: the edge of the root part of the blade edge side of the blade (3) is provided with an arc-shaped bulge part (27); when the folding knife is in a closed state, the arc-shaped protruding part (27) extends out of the positive handle (1) and the back handle (2); the edge of the blade edge side of the blade (3) close to the root is provided with a concave arc (24).