Folding knife plunger locking mechanism and folding knife

Abstract

The utility model discloses a folding knife plunger locking mechanism and a folding knife, and belongs to the technical field of knives. The folding knife plunger locking mechanism comprises a gear ring, a plunger, a limiting column, a sliding sleeve and a gear, the sliding sleeve is fixedly installed on one side of the gear ring, a push-up sliding groove is formed in the side wall of the sliding sleeve, the plunger is installed on the sliding sleeve in a sliding mode and matched with the sliding sleeve in a sliding mode, the limiting column is arranged in the push-up sliding groove in a sliding mode, and the gear is meshed with the gear ring. The folding knife comprises a knife handle, a knife head, a rotating shaft and the folding knife plunger locking mechanism, and the folding knife aims at solving the problems that an existing folding knife plunger locking mechanism is complex in structure, installation difficulty and production cost are increased, a transmission part is extremely prone to abrasion, and transmission efficiency and precision are reduced. The cutter is ingenious in structure, low in combination machining difficulty and low in production cost, the production efficiency of the cutter can be correspondingly improved, meanwhile, fewer parts and contact surfaces are arranged, and the problems caused by abrasion or faults of the parts are also reduced.

Description

Technical Field

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

[0002] Folding knives are tools that people often use in daily life. They are mainly composed of a handle body and a blade body. Currently, there are folding knives on the market that can lock the blade body to maintain an open state and a folded state at the same time. The locking mechanism of this type of folding knives is generally provided with a spring component to reset the switch component of the locking mechanism. The spring of this type of folding knives is arranged inside the handle body. The spring is basically fixed by buckling the two ends of the spring on the switch component and the handle body respectively. Although this type of spring locking structure is simple, low-cost, and easy to process, the locking effect of this structure is not good, and the blade body is easily bounced open due to misoperation. In addition, most of the existing folding knife plunger locking mechanisms have complex linkage structures, which not only increases the difficulty of installation and production costs, but also the transmission components are prone to wear, reducing transmission efficiency and accuracy.

[0003] Therefore, it is urgent to propose a novel folding knife plunger locking mechanism and a folding knife to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of the research and development of the utility model is to solve the problem that the existing folding knife plunger locking mechanism has a complex structure, which not only increases the difficulty of installation and production costs, but also the transmission parts are very easy to wear, reducing the transmission efficiency and accuracy. A brief overview of the utility model is given 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 determine the key or important parts 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 plunger locking mechanism includes a gear ring, a plunger, a limit post, a sliding sleeve and a gear. A sliding sleeve is fixedly installed on one side of the gear ring, a push-up sliding groove is provided on the side wall of the sliding sleeve, the plunger is slidably installed in the sliding sleeve, the limit post is slidably set in the push-up sliding groove, and the gear is meshed with the gear ring.

[0007] Preferably, the sliding sleeve and the gear ring are arranged coaxially.

[0008] Preferably, one side of the push-up slide groove is processed into a slope side surface, and when the plunger slides axially along the sliding sleeve, the side wall of the plunger slides and fits with the slope side surface.

[0009] Preferably, a mounting plate is also included, and the gear ring and the gear are respectively rotatably connected to the mounting plate.

[0010] Preferably, it also includes an upper cover, which is buckled on the top of the plunger, and is provided with a through hole for accommodating the passage of the plunger, and a limiting groove for accommodating the passage of the limiting column.

[0011] Preferably: a return spring is also included, and the return spring is connected to the mounting plate and the gear respectively.

[0012] Option 2: A folding knife, comprising a handle, a knife head, a rotating shaft and a folding knife plunger locking mechanism. The folding knife plunger locking mechanism is the folding knife plunger locking mechanism described in Option 1. The knife head is rotatably mounted on the knife handle via the rotating shaft. The folding knife plunger locking mechanism is mounted on the knife handle, and the knife head establishes a card-mounted connection with the plunger.

[0013] Preferably, at least one limiting hole is formed on the cutter head, and the end of the plunger protruding out of the sliding sleeve is clamped in the limiting hole.

[0014] Preferably, a handle connecting portion is also included, and the mounting plate is fixedly connected to the handle via the handle connecting portion.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model can realize the locking or loosening of the blade by the plunger only by turning the gear, which greatly reduces the transmission difficulty and avoids the self-locking problem of the mechanism caused by the complex transmission structure;

[0017] 2. The utility model has an ingenious structure, low difficulty in combined processing, and low production cost, which will increase the production efficiency of the tool accordingly. At the same time, fewer parts and contact surfaces also reduce problems caused by component wear or failure;

[0018] 3. The design of the utility model is simple, intuitive and easy to operate, so that the user can easily open and close the folding knife without complicated operating steps, and the folding knife is locked faster and can provide higher security in the locked state, which can ensure the safety and reliability of the folding knife when in use or carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the folding knife plunger locking mechanism described in the first embodiment;

[0020] Figure 2 is an exploded view of the folding knife plunger locking mechanism described in the second embodiment;

[0021] Figure 3 is a diagram of the use and installation of the folding knife plunger locking mechanism described in the second specific embodiment;

[0022] Figure 4 is a perspective view of the folding knife plunger locking mechanism described in the third embodiment;

[0023] Figure 5 is a diagram of the use and installation of the folding knife plunger locking mechanism described in the third specific embodiment;

[0024] Figure 6 yes Figure 5 A magnified image of point A;

[0025] Figure 7 is a matching installation diagram of the folding knife plunger locking mechanism described in the fourth specific embodiment;

[0026] Figure 8 yes Figure 7 BB cross-section diagram;

[0027] Fig. 9 It is a three-dimensional diagram of the folding knife described in the utility model;

[0028] Fig.10 yes Fig. 9 Enlarged view of point C;

[0029] Fig.11 It is a three-dimensional diagram of the cutter head described in the utility model;

[0030] Fig.12 This is a diagram of the matching installation of the cutter head and the plunger described in the utility model;

[0031] In the figure, 1-toothed ring, 2-plunger, 3-limiting column, 4-sleeve, 5-gear, 6-mounting plate, 7-push-up slide, 8-upper cover, 9-reset spring, 10-tool handle connecting part, 101-tool handle, 102-tool head, 103-rotating shaft, 104-limiting hole, 81-through hole, 82-limiting groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is described below by means of specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0033] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection, including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: choose welding connection for fixed connection and hinge connection for detachable connection.

[0034] Specific implementation method 1: Combination Figure 1 and Figure 9-12 The present embodiment is described. The plunger locking mechanism of the folding knife of the present embodiment comprises a gear ring 1, a plunger 2, a limiting column 3, a sliding sleeve 4 and a gear 5. The sliding sleeve 4 is fixedly mounted on one side of the gear ring 1. The side wall of the sliding sleeve 4 is provided with a push-up slide groove 7. The plunger 2 is slidably mounted on the sliding sleeve 4 for sliding cooperation. The limiting column 3 is slidably arranged in the push-up slide groove 7. The gear 5 is meshed with the gear ring 1.

[0035] The toothed ring 1 can be integrally formed with the sliding sleeve 4;

[0036] The sliding sleeve 4 is coaxially arranged with the gear ring 1. One side of the push-up slide groove 7 is processed into a slope side surface, and when the plunger 2 slides axially along the sliding sleeve 4, the side wall of the plunger 2 slides and fits with the slope side surface, and the slope side surface can be a plane or an arc surface.

[0037] When in use, the folding knife plunger locking mechanism of this embodiment is installed on the folding knife, and the folding knife is as follows: Fig.12 As shown, the blade head 102 of the folding knife is rotatably mounted on the blade handle 101 through a rotating shaft 103, and the gear ring 1 and the gear 5 are both rotatably mounted on the blade handle 101. When the gear 5 is turned, due to the meshing relationship, the gear 5 drives the gear ring 1 to rotate, and the sliding sleeve 4 and the limiting column 3 on the gear ring 1 rotate synchronously. While the sliding sleeve 4 rotates, due to the action of the pushing slide groove 7, the pushing slide groove 7 drives the limiting column 3 to slide along the axial direction of the sliding sleeve 4, and then the plunger 2 also slides along the axial direction of the sliding sleeve 4. Finally, the plunger 2 is locked in the form of pressing the blade head 102 of the folding knife or clamping it in the limiting hole 104 opened on the blade head 102. When the gear 5 is turned in the reverse direction, the plunger 2 retracts until it is completely moved out of the limiting hole 104 to achieve locking contact.

[0038] Specific implementation method 2: Combination Figure 2-3 and Figure 9-12The present embodiment is described. The folding knife plunger locking mechanism of the present embodiment comprises a gear ring 1, a plunger 2, a limiting column 3, a sliding sleeve 4, a gear 5 and a mounting plate 6. A sliding sleeve 4 is fixedly mounted on one side of the gear ring 1. A push-up slide groove 7 is provided on the side wall of the sliding sleeve 4. The plunger 2 is slidably mounted on the sliding sleeve 4 for sliding fit. The limiting column 3 is slidably arranged in the push-up slide groove 7. The gear 5 is meshed with the gear ring 1. The gear ring 1 is connected to the mounting plate 6 by a rotating shaft. The gear 5 is connected to the mounting plate 6 by a rotating column. A baffle is installed on the rotating column. The baffle is arranged on the front side of the gear 5 and is slidably fitted with the gear 5 to limit the axial position of the gear 5.

[0039] The toothed ring 1 can be integrally formed with the sliding sleeve 4, and a sliding hole for accommodating the plunger 2 to pass through is processed on the mounting plate 6;

[0040] The sliding sleeve 4 is coaxially arranged with the gear ring 1. One side of the push-up slide groove 7 is processed into a slope side surface, and when the plunger 2 slides axially along the sliding sleeve 4, the side wall of the plunger 2 slides and fits with the slope side surface, and the slope side surface can be a plane or an arc surface.

[0041] When in use, the folding knife plunger locking mechanism of this embodiment is installed on the folding knife, and the folding knife is as follows: Fig.12 As shown, the blade head 102 of the folding knife is rotatably mounted on the blade handle 101 through the rotating shaft 103, and the mounting plate 6 is fixedly mounted on the blade handle 101. When the gear 5 is turned, due to the meshing relationship, the gear 5 drives the gear ring 1 to rotate, and the sliding sleeve 4 on the gear ring 1 rotates synchronously with the limiting column 3. While the sliding sleeve 4 rotates, due to the action of the pushing slide groove 7, the pushing slide groove 7 drives the limiting column 3 to slide along the axial direction of the sliding sleeve 4, and then the plunger 2 also slides along the axial direction of the sliding sleeve 4. Finally, the plunger 2 passes through the mounting plate 6 to lock the blade head 102 of the folding knife or the limiting hole 104 opened on the clamping blade head 102. The gear 5 is turned in the reverse direction, and the plunger 2 retracts to completely move out of the limiting hole 104 to achieve locking contact.

[0042] Specific implementation method three: Combination Figure 3-6 and Figure 9-12 The present embodiment is described based on the specific embodiment 1. The folding knife plunger locking mechanism of the present embodiment includes a gear ring 1, a plunger 2, a limit column 3, a sleeve 4, a gear 5, a mounting plate 6, a shank connection part 7 and a reset spring 9. The sleeve 4 is fixedly mounted on one side of the gear ring 1, and a push-up slide groove 7 is provided on the side wall of the sleeve 4. The plunger 2 is slidably mounted on the sleeve 4 for sliding cooperation, and the limit column 3 is slidably arranged in the push-up slide groove 7. The gear 5 is meshed with the gear ring 1, and the gear ring 1 is rotationally connected to the mounting plate 6, and the reset spring 9 is respectively connected to the mounting plate 6 and the gear 5.

[0043] The toothed ring 1 can be integrally formed with the sliding sleeve 4, and a sliding hole for accommodating the plunger 2 to pass through is processed on the mounting plate 6;

[0044] The sliding sleeve 4 is coaxially arranged with the gear ring 1. One side of the push-up slide groove 7 is processed into a slope side surface, and when the plunger 2 slides axially along the sliding sleeve 4, the side wall of the plunger 2 slides and fits with the slope side surface, and the slope side surface can be a plane or an arc surface.

[0045] The reset spring 9 may be a tension spring or a torsion spring, and is used to reset the gear 5 .

[0046] A more preferred technical solution is that the reset spring 9 of this embodiment is a tension spring, and the two ends of the tension spring are respectively mounted on the plate 6 and the gear 5 to establish a fixed connection.

[0047] When in use, the folding knife plunger locking mechanism of this embodiment is installed on the folding knife, and the folding knife is as follows: Fig.12 As shown, the blade head 102 of the folding knife is rotatably mounted on the handle 101 through the rotating shaft 103, and the mounting plate 6 and the handle connecting portion 7 are fixedly mounted on the handle 101. When the gear 5 is not turned, the reset spring 9 is in the initial state, at which time the plunger 2 is kept in a locked state, that is, the plunger 2 passes through the mounting plate 6 to press against the blade head 102 of the folding knife or is clamped in the limiting hole 104 opened on the blade head 102 to achieve locking. This design prevents the blade head 102 from opening and closing arbitrarily when not in use, further improving the The lifting locking effect is that when the gear 5 is turned, the reset spring 9 stretches or contracts. Due to the meshing relationship, the gear 5 drives the gear ring 1 to rotate, and the sliding sleeve 4 on the gear ring 1 rotates synchronously with the limiting column 3. When the sliding sleeve 4 rotates, due to the action of the pushing sliding groove 7, the pushing sliding groove 7 drives the limiting column 3 to slide along the axial direction of the sliding sleeve 4, and then the plunger 2 also slides along the axial direction of the sliding sleeve 4. Finally, the plunger 2 passes through the mounting plate 6 and moves out of the limiting hole 104, so that the cutter head 102 can be rotated to any position.

[0048] A more preferred technical solution is that in order to improve the locking effect, the folding knife plunger locking mechanism of this embodiment can be used in pairs and symmetrically installed on the left and right sides of the handle 10, and the handle connection part 7 and the linkage block 11 of the two folding knife plunger locking mechanisms used in pairs can share one, that is, the return springs 9 on both sides are connected on both sides of the handle connection part 7 and the linkage block 11 respectively.

[0049] Specific implementation method four: Combination Figure 7-Figure 12 To explain this embodiment, the folding knife plunger locking mechanism of this embodiment is realized based on the folding knife plunger locking mechanism described in the specific embodiment three, and also includes an upper cover 8, which is buckled on the outer side of the top of the plunger 2 and fixedly connected to the knife handle 101, and the upper cover 8 is provided with a through hole 81 for accommodating the passage of the plunger 2, and the upper cover 8 is provided with a limiting groove 82 for accommodating the passage of the limiting column 3, and the limiting groove 82 provides a limiting effect for the limiting column 3 along the axial direction of the plunger 2, so that the limiting column 3 can better drive the plunger 2 to slide.

[0050] Specific implementation method five: Combination Figure 7-12 To describe this embodiment, based on the folding knife plunger locking mechanism described in specific embodiment four, the folding knife of this embodiment comprises a handle 101, a knife head 102, a rotating shaft 103 and a folding knife plunger locking mechanism, wherein the folding knife plunger locking mechanism is the folding knife plunger locking mechanism described in any one of claims 1 to 8, wherein the knife head 102 is rotatably mounted on the handle 101 via the rotating shaft 103, and the folding knife plunger locking mechanism is mounted on the handle 101, wherein the knife head 102 is connected to the plunger 2 by a clamping connection, and at the same time, one side of the gear 5 passes through the handle 101 and is placed on the outside of the handle 101, in order to facilitate manual shifting of the gear 5, and the mounting plate 6 is fixedly connected to the handle 101 via the handle connecting portion 10.

[0051] At least one limiting hole 104 is formed on the cutter head 102 , and the end of the plunger 2 protruding out of the sliding sleeve 4 is clamped in the limiting hole 104 .

[0052] When in use, take the rotating shaft 103 as the rotation center and rotate in or out between the front and rear sides of the knife handle 101 at will. When the knife head 102 needs to be rotated to any position, manually turn the gear 5, and the reset spring 9 stretches or contracts. Due to the meshing relationship, the gear 5 drives the gear ring 1 to rotate, and the sliding sleeve 4 on the gear ring 1 rotates synchronously with the limiting column 3. While the sliding sleeve 4 rotates, due to the action of the pushing sliding groove 7, the pushing sliding groove 7 drives the limiting column 3 to slide along the axial direction of the sliding sleeve 4, and then the plunger 2 also slides along the axial direction of the sliding sleeve 4. Finally, the plunger 2 completely disengages from the limiting hole 104 on the knife head 102, so that there is no clamping relationship between the plunger 2 and the knife head 102, and then the knife head 102 can be rotated to any position.

[0053] When the cutter head 102 needs to be rotated to the locked position, the cutter head 102 rotates to the position where its upper limit hole 104 is aligned with the plunger 2, the above-mentioned gear 5 is released, the reset spring 9 is reset, and the gear 5 moves accordingly. Due to the meshing relationship, the gear 5 drives the gear ring 1 to rotate, and the sliding sleeve 4 on the gear ring 1 rotates synchronously with the limiting column 3. While the sliding sleeve 4 rotates, due to the action of the pushing slide groove 7, the pushing slide groove 7 drives the limiting column 3 to slide along the axial direction of the sliding sleeve 4, and then the plunger 2 also slides along the axial direction of the sliding sleeve 4. Finally, the plunger 2 passes through the mounting plate 6, and the locking is achieved in the form of the end of the plunger 2 probing into the limiting hole 104 opened on the cutter head 102, so that there is a clamping relationship between the plunger 2 and the cutter head 102, and then the cutter head 102 is locked.

[0054] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present utility model will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present utility model.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Folding knife plunger locking mechanism, characterized by: The invention comprises a gear ring (1), a plunger (2), a limiting column (3), a sliding sleeve (4) and a gear (5); a sliding sleeve (4) is fixedly mounted on one side of the gear ring (1); a side wall of the sliding sleeve (4) is provided with a push-up sliding groove (7); the plunger (2) is slidably mounted on the sliding sleeve (4) for sliding cooperation; the limiting column (3) is slidably arranged in the push-up sliding groove (7); and the gear (5) is meshed with the gear ring (1).

2. The folding knife plunger locking mechanism according to claim 1, characterized in that: The sliding sleeve (4) is coaxially arranged with the gear ring (1).

3. The folding knife plunger locking mechanism according to claim 1, characterized in that: One side of the push-up slide groove (7) is processed into a slope side surface, and when the plunger (2) slides axially along the sliding sleeve (4), the side wall of the plunger (2) slides and fits with the slope side surface.

4. The folding knife plunger locking mechanism according to claim 1, characterized in that: It also comprises a mounting plate (6), and the gear ring (1) and the gear (5) are respectively connected to the mounting plate (6) in a rotationally matched manner.

5. The folding knife plunger locking mechanism according to claim 1, characterized in that: The invention also comprises an upper cover (8), which is buckled on the top of the plunger (2), and is provided with a through hole (81) for accommodating the passage of the plunger (2), and a limiting groove (82) for accommodating the passage of the limiting column (3).

6. The folding knife plunger locking mechanism according to claim 4, characterized in that: It also includes a return spring (9), which is connected to the mounting plate (6) and the gear (5) respectively.

7. A folding knife, characterized in that: The folding knife comprises a knife handle (101), a knife head (102), a rotating shaft (103) and a folding knife plunger locking mechanism, wherein the folding knife plunger locking mechanism is the folding knife plunger locking mechanism according to any one of claims 1 to 6, wherein the knife head (102) is rotatably mounted on the knife handle (101) via the rotating shaft (103), the folding knife plunger locking mechanism is mounted on the knife handle (101), and the knife head (102) is connected to the plunger (2) by a clamping connection.

8. The folding knife according to claim 7, characterized in that: At least one limiting hole (104) is provided on the cutter head (102), and the end of the plunger (2) protruding out of the sliding sleeve (4) is clamped in the limiting hole (104).

9. The folding knife according to claim 7, characterized in that: It also comprises a knife handle connecting portion (10), and the mounting plate (6) is fixedly connected to the knife handle (101) via the knife handle connecting portion (10).

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