Folding knife

Abstract

The utility model discloses a folding knife belongs to manual cutting tools, the existing folding knife uses the spiral compression spring of configuration in button to provide the locking elastic force of button and the width of handle is bigger, the utility model discloses a first rolling assembly of the sleeve in the radial outer side of pivot is arranged between the first side surface of the rear end of folding part and first wall, the second rolling assembly of the sleeve in the radial outer side of pivot is arranged between the second side surface of the rear end of folding part and second wall, can promote folding part relative handle flexible rotation. Moreover, the first rolling assembly and second rolling assembly sleeve in the radial outer side of pivot have the profile greater than pivot diameter, make the rear end of folding part be supported in the lateral, avoid shaking.

Description

Technical Field

[0001] This utility model pertains to manual knives, specifically a folding knife. Background Technology

[0002] A folding knife includes a handle and a folding section that is pivotally mounted to the handle and rotates relative to the handle to achieve folding and unfolding. For safety, the folding section is often locked in either the folded or unfolded state by a locking mechanism. Various locking methods exist for the folding section, such as back locks, side locks, and push-button locks, all of which use spring force to hold the locking element (locking part) in the locked position. To rotate the folding section, the spring force must be overcome to release the lock before it can be rotated.

[0003] Taking the button lock as an example, in order to keep the button in the position that locks the folding part, a spiral compression spring is usually provided at one end of the axial button. The spiral compression spring is relatively long, which results in a larger width of the handle of the folding knife (corresponding to the axial dimension of the pivot).

[0004] Furthermore, when assembling the folding section onto the handle via the pivot, it is typically tightened along the pivot's axis to prevent loosening, which places high demands on the assembly process. If the folding section is tightened too much during assembly, it will be difficult to rotate; if it is not tightened enough, it will wobble with increasing rotation. Utility Model Content

[0005] This invention addresses the drawback of existing folding knives where the use of a spiral compression spring on the button to provide locking force results in a wider handle. It provides a folding knife with a handle that is not too wide. This folding knife uses a simpler method of providing elasticity, ensuring that the elasticity is moderate and long-lasting. Furthermore, it prevents the folding part of the knife from wobbling even after frequent rotations.

[0006] To achieve the above objectives, the folding knife of this utility model includes: The handle includes a first wall and a second wall, with a storage section formed between the first wall and the second wall; The folding part has its rear end located at the front end of the storage part and is mounted to the handle via a lateral pivot. The radial edge of its rear end is provided with a first positioning groove and a second positioning groove. A locking pin is laterally fitted to the handle. It includes a large diameter section, a small diameter section, and a pressing end. The pressing end is exposed outside the handle. It uses elastic force to make the large diameter section biased to cooperate with the first positioning groove or the second positioning groove. Pressing the pressing end overcomes the elastic force and makes the large diameter section disengage, and the small diameter section corresponds to the first positioning groove or the second positioning groove for the folding part to rotate around the pivot. An elastic part that provides the elastic force is attached to the handle and acts as a plate on the other end of the locking pin.

[0007] This invention significantly reduces the lateral (axial) dimension of the elastic part by attaching it to the handle and acting as a plate on the other end of the locking pin, compared to a helical compression spring located at one end of the locking pin. In comparison, the lateral dimension of the elastic part is its thickness, while that of the helical compression spring is its length. Furthermore, the plate-shaped elastic part can extend sufficiently along the length of the handle, resulting in a small stroke relative to its length for unlocking. Consequently, during the unlocking stroke, a relatively consistent elastic force is maintained at both the beginning and end of the pressing phase, leading to a more uniform pressing force and a better feel. The helical compression spring, as mentioned earlier, occupies a significant portion of the handle's lateral dimension. Its compression stroke for unlocking is relatively large relative to its length, resulting in greater variation in elastic force during the unlocking stroke. The initial compression phase has a small elastic force, making pressing the locking pin easier, while the final compression phase has a large elastic force, making pressing the locking pin more difficult.

[0008] Preferably, the pressing end protrudes from the first wall, making it convenient to press with fingers while holding the handle. The elastic part is integrated with the second wall, which can reduce the space occupied by the elastic part and make the handle more compact.

[0009] Preferably, the handle includes a first panel and a second panel, the first panel being attached to a first wall and the second panel being attached to a second wall. The first and second panels can increase the comfort and reliability of gripping the handle, and can also cover the first and second walls, maintaining the concealment and security of the internal structure of the handle.

[0010] Preferably, the side of the second panel facing the second wall has a relief groove corresponding to the elastic part, providing space for the deformation of the elastic part.

[0011] Preferably, a first rolling assembly is disposed between the first side of the rear end of the folded portion and the first wall, and a second rolling assembly is disposed between the second side of the rear end of the folded portion and the second wall, both disposed radially outside the pivot. The presence of the first and second rolling assemblies allows the folded portion to rotate flexibly relative to the handle. Moreover, the first and second rolling assemblies, disposed radially outside the pivot, have a profile larger than the pivot diameter, thus providing lateral support to the rear end of the folded portion and preventing wobbling.

[0012] Preferably, both the first rolling assembly and the second rolling assembly include a plurality of balls constrained by a cage.

[0013] Preferably, the rear end of the folded portion has a through hole, and a bushing is installed inside the through hole. The first rolling assembly and the second rolling assembly are fitted radially outside the bushing, and the pivot passes through the bushing. The bushing maintains the assembly relationship between the pivot, the first rolling assembly, the second rolling assembly, and the folded portion, thus maintaining the rotational flexibility and assembly stability of the folded portion.

[0014] Preferably, the pivot includes a first shaft segment and a second shaft segment. The first shaft segment and the second shaft segment are axially connected by threads. When the threads are tightened, the first rolling component is pressed between the first side and the first wall of the rear end of the folded portion, and the second rolling component is pressed between the second side and the second wall of the rear end of the folded portion. Accordingly, the first rolling component can be pressed between the first side and the first wall of the rear end of the folded portion by the preload of the pivot, and the second rolling component can be pressed between the second side and the second wall of the rear end of the folded portion. Due to the presence of the first and second rolling components, even with a large preload, flexible rotation can be achieved by the rolling of the first and second rolling components without obstruction. Therefore, the preload of the pivot can be appropriately increased during assembly. Due to the rolling of the first and second rolling components, after long-term use and repeated rotation, the first and second rolling components experience less wear, are less prone to loosening, and are less likely to cause the folded portion to wobble.

[0015] In different embodiments, the first wall and the second wall are either separate structures or integrated. Separate structures facilitate the assembly of the folding portion with the handle, while integrated structures help maintain the rigidity of the handle.

[0016] In different embodiments, the folding portion is a cutting blade or the folding portion includes a blade holder and a blade, the blade holder being pivotally mounted to the handle, and the blade being detachably mounted to the blade holder.

[0017] In different embodiments, the pressing end protrudes from the first wall, and a clip is disposed on the outer side of the second wall, with the elastic part integrated with the clip. This structure utilizes the clip to create the elastic part, balancing portability and the simplicity of the elastic part's structure.

[0018] Preferably, the other end of the locking pin protrudes from the second wall. This structure only requires machining a through hole in the second wall to allow the other end of the locking pin to protrude, eliminating the need for a complex structure and reducing manufacturing costs.

[0019] Preferably, the second wall is provided with a latch, one end of the latch is inserted into the latch, and the other end of the latch is pivotally secured to the handle. This reliably assembles the latch to the handle, ensuring that the latch is secure and does not wobble.

[0020] In different embodiments, the handle includes a cap that fits against the front end of the first wall, with a pressing end protruding from the cap. This cap configuration can provide indication of operation of the pressing end.

[0021] Preferably, the cover is pinned to the first wall and pivotally fastened to the handle.

[0022] In different embodiments, the handle includes a stop pin located within the storage section. When the folding portion is folded into the storage section, it contacts the stop pin to maintain a gap between the blade and the bottom surface of the storage section. This prevents the blade from impacting and being damaged by the bottom surface of the storage section during folding.

[0023] In different embodiments, a movable cover plate is disposed on one side of the handle, with a movable gap maintained between the movable cover plate and the handle. The pressing end is hidden inside the movable cover plate and abuts against the movable cover plate. Accordingly, the pressing end is hidden to prevent accidental contact with the pressing end.

[0024] This invention attaches an elastic part that provides elasticity to the handle and acts as a plate on the other end of the locking pin. The helical compression spring disposed at one end of the locking pin greatly reduces the size of the elastic part in the lateral direction (axial direction of the pivot).

[0025] This invention enables the folding part to rotate flexibly relative to the handle by placing a first rolling assembly between the first side and the first wall at the rear end of the folding part and a second rolling assembly between the second side and the second wall at the rear end of the folding part. Furthermore, the first and second rolling assemblies, having a profile larger than the diameter of the pivot, provide lateral support to the rear end of the folding part, preventing wobbling. Attached Figure Description

[0026] Figure 1 This is an axonometric view of the folding knife according to Embodiment 1 of this utility model; Figure 2 This is an axonometric view of the folding knife according to Embodiment 1 of this utility model from another perspective; Figure 3 This is a side view of the folding knife according to Embodiment 1 of this utility model. Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 Sectional view along axis AA; Figure 6 for Figure 3 Enlarged cross-sectional view of BB direction; Figure 7 for Figure 4 Enlarged cross-sectional view along the CC direction; Figure 8 for Figure 7 A diagram showing the folded section rotating to the storage section; Figure 9 This is an exploded view of the folding knife of Embodiment 1 of this utility model; Figure 10 for Figure 9 A schematic diagram of the structure shown from another perspective; Figure 11 for Figure 9 Enlarged view of the folded section, locking pin, first rolling assembly, and second rolling assembly; Figure 12 This is a schematic diagram of the first wall and the second wall from one perspective in Embodiment 1 of this utility model; Figure 13 This is a schematic diagram of the first and second walls from another perspective in Embodiment 1 of this utility model; Figure 14 This is a schematic diagram showing the first and second walls of Embodiment 1 of the present invention cut apart; Figure 15 This is a schematic diagram from another perspective showing the first and second walls of Embodiment 1 of this utility model being cut apart; Figure 16 This is an exploded view of the folding knife in Embodiment 2 of this utility model; Figure 17 for Figure 16 A schematic diagram of the structure shown from another perspective; Figure 18 This is a cross-sectional structural diagram of the folding knife in the folded state according to Embodiment 2 of this utility model; Figure 19 for Figure 18 DD section view; Figure 20 This is an exploded view of the folding knife in Embodiment 3 of this utility model; Figure 21 for Figure 20 A schematic diagram of the structure shown from another perspective; Figure 22 This is an exploded view of the folding knife in Embodiment 4 of this utility model; Explanation of the labels in the diagram: 100 handle, 110 first wall, 120 second wall, 121 buckle, 130 spine, 140 storage part, 141 bottom surface, 150 first panel, 160 second panel, 161 clearance groove, 170 cover, 171 pin, 180 stop pin, 190 movable cover plate. 200 Folded part, 201 First positioning groove, 202 Second positioning groove, 203 Blade; 300 Pivot, 301 First Axis Segment, 302 Second Axis Segment; 400 Locking pin, 401 Large diameter section, 402 Small diameter section, 403 Pressing end; 500 elastic part; 600 bushing; 710 First rolling assembly, 720 Second rolling assembly, 701 Cage, 702 Ball bearing; 800 clips, 801 bend. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Among them, "upper" and "lower," "left" and "right," and "front" and "rear" are opposite directions.

[0030] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0031] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0032] Example 1 like Figure 1-11 As shown, the folding knife of this embodiment includes a handle 100, a folding portion 200, a pivot 300, a locking pin 400, an elastic portion 500, a bushing 600, a first rolling assembly 710, and a second rolling assembly 720.

[0033] like Figure 12-15As shown, the handle 100 includes a first wall 110 and a second wall 120, and the first wall 110 and the second wall 120 form a storage portion 140.

[0034] The rear end of the folding part 200 is located at the front end of the storage part 140 and is rotatably mounted on the handle 100 via a pivot 300 in the horizontal direction (consistent with the left and right direction). The radial edge of the rear end of the folding part 200 is provided with a first positioning groove 201 and a second positioning groove 202.

[0035] The locking pin 400 is laterally (consistent with the left-right direction) assembled to the handle 100. It includes a large diameter section 401, a small diameter section 402 and a pressing end 403. The pressing end 403 is exposed outside the handle 100. It uses elastic force to make the large diameter section 401 biased to cooperate with the first positioning groove 201 or the second positioning groove 202. Pressing the pressing end 403 overcomes the elastic force to make the large diameter section 401 disengage and the small diameter section 402 corresponds to the first positioning groove 201 or the second positioning groove 202 to allow the folding part to rotate around the pivot 300.

[0036] The elastic part 500 provides the elastic force, which is attached to the handle 100 and acts in a plate-like shape on the other end of the locking pin 400.

[0037] This folding knife utilizes a plate-shaped elastic section attached to the handle to provide elasticity, which acts on the other end of the locking pin. This significantly reduces the lateral (axial direction of the pivot, consistent with the left-right direction) size of the elastic section compared to the helical compression spring located at one end of the locking pin. In comparison, the lateral size of the elastic section is its thickness, while the helical compression spring is its length. Furthermore, the plate-shaped elastic section can extend sufficiently along the length of the handle, resulting in a very small travel distance relative to its length for unlocking. Consequently, during the unlocking process, a relatively consistent elastic force is maintained at both the beginning and end of the pressing phase, leading to a more even pressing force and a better feel. Unlike helical compression springs, as mentioned earlier, the length of a helical compression spring occupies the lateral dimension of the handle. The compression stroke for unlocking is relatively large relative to its length dimension, resulting in a large change in elastic force during its unlocking stroke. The elastic force is small at the beginning of the compression, making it easy to press the locking pin end, while the elastic force is large at the end of the compression, making it more difficult to press the locking pin end.

[0038] In the illustrated structure, the pressing end 403 protrudes from the through hole in the first wall 110, facilitating pressing with fingers while holding the handle. The elastic part 500 is integrally formed with the second wall 120, specifically by stamping from a steel plate, which reduces the space occupied by the elastic part and makes the handle more compact. In other embodiments, the elastic part 500 can be fixed to the second wall 120 as an independent component by welding, bonding, or other methods.

[0039] In the illustrated structure, the handle 100 includes a first panel 150 and a second panel 160. The first panel 150 is fitted to the first wall 110 and has a through hole for the locking pin to extend out. The second panel 160 is fitted to the second wall 120. The first panel 150 and the second panel 160 can increase the comfort and reliability of gripping the handle, and can also cover the first wall and the second wall, maintaining the concealment and security of the internal structure of the handle.

[0040] In the illustrated structure, the second panel 160 has a clearance groove 161 corresponding to the elastic part 500 on the side facing the second wall 120. This provides space for the deformation of the elastic part.

[0041] In the illustrated structure, a first rolling assembly 710, fitted radially outward from the pivot 300, is placed between the first side (left side) of the rear end of the folded portion 200 and the first wall 110. A second rolling assembly 720, fitted radially outward from the pivot 300, is placed between the second side (right side) of the rear end of the folded portion 200 and the second wall 120. The presence of the first and second rolling assemblies allows the folded portion to rotate flexibly relative to the handle. Furthermore, the first and second rolling assemblies, fitted radially outward from the pivot, have a profile larger than the pivot diameter, providing lateral support to the rear end of the folded portion and preventing wobbling.

[0042] In the illustrated structure, both the first rolling assembly 710 and the second rolling assembly 720 include a plurality of balls 702 constrained by a cage 701.

[0043] In the illustrated structure, a through hole is provided at the rear end of the folding portion 200, and a bushing 600 is installed inside the through hole. The first rolling assembly 710 and the second rolling assembly 720 are fitted radially outside the bushing 600, and the pivot 300 passes through the bushing 600. The bushing maintains the assembly relationship between the pivot, the first rolling assembly, the second rolling assembly and the folding portion, and maintains the rotational flexibility and assembly stability of the folding portion.

[0044] In the illustrated structure, the pivot 300 includes a first shaft segment 301 and a second shaft segment 302. The first shaft segment 301 and the second shaft segment 302 are axially connected by threads. When the threads are tightened, the first rolling assembly 710 is pressed between the first side and the first wall of the rear end of the folded portion, and the second rolling assembly 720 is pressed between the second side and the second wall of the rear end of the folded portion. Accordingly, the first rolling assembly can be pressed between the first side and the first wall of the rear end of the folded portion, and the second rolling assembly can be pressed between the second side and the second wall of the rear end of the folded portion, by the preload of the pivot. Due to the presence of the first and second rolling assemblies, even with a large preload, flexible rotation can be achieved by the rolling of the first and second rolling assemblies without obstruction. Therefore, the preload of the pivot can be appropriately increased during assembly. Due to the rolling of the first and second rolling assemblies, after long-term use and repeated rotation, the first and second rolling assemblies experience less wear, are less prone to loosening, and are less likely to cause the folded portion to wobble.

[0045] In the illustrated structure, the first wall 110 and the second wall 120 are connected as a single unit via the spine 130, and they are preferably constructed by punching and bending steel plates. Being connected as a single unit helps maintain the rigidity of the handle. In other embodiments, the first wall and the second wall are separate structures, which facilitates the assembly of the folded portion with the handle. When the first wall and the second wall are presented as separate structures, it is as if... Figure 14 , Figure 15 The first and second walls shown are separated on the spine in the same way.

[0046] In this embodiment, the folding portion is a cutting blade. In other embodiments, the folding portion may also take other structural forms, such as including a blade holder and a blade, with the blade holder pivotally mounted to the handle and the blade detachably mounted to the blade holder, thus embodying a segmented structure.

[0047] Example 2 like Figure 16-19 As shown, this embodiment differs from Embodiment 1 only in the following aspects: First, the first panel 150 and the second panel 160 in the embodiment are omitted.

[0048] Secondly, the pressing end 403 protrudes from the first wall 110, and a clip 800 is disposed on the outer side of the second wall 120. The elastic part 500 is integrated with the clip 800. This structure utilizes the clip to create the elastic part, taking into account both portability and the simplicity of the elastic part's structure. Furthermore, the other end of the locking pin 400 protrudes from the second wall 120. This structure only requires machining a through hole on the second wall for the other end of the locking pin 400 to protrude from the second wall 120, eliminating the need for a complex structure and reducing manufacturing costs. Further, the second wall 120 is provided with a latch 121. One end of the clip is made into a bent part 801 and engages with the latch 121, while the other end of the clip is pivotally secured to the handle. This reliably assembles the latch to the handle, ensuring that the latch is secure and does not wobble.

[0049] Third, in this embodiment, the handle 100 includes a cover 170 that fits against the front end of the first wall 110, and a pressing end 403 protrudes from the cover 170. This cover structure provides an indication for operating the pressing end 403. Specifically, the cover 170 is positioned by a pin 171 inserted into a hole in the first wall 110 and is secured to the handle 100 by a pivot 300.

[0050] Fourth, in this embodiment, the handle 100 includes a stop pin 180 located within the storage portion 140. When the folding portion 200 is folded into the storage portion 140, it contacts the stop pin to maintain a gap S between the blade and the bottom surface 141 of the storage portion 140. This prevents the blade from impacting the bottom surface of the storage portion and being damaged during folding.

[0051] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described in detail.

[0052] Example 3 like Figure 20-21 As shown, this embodiment differs from Embodiment 1 only in the following aspects: First, the first panel 150 and the second panel 160 in the embodiment are omitted.

[0053] Secondly, in this embodiment, the handle 100 includes a cover 170 that fits against the front end of the first wall 110, with a pressing end 403 protruding from the cover 170. This cover structure provides indication for operating the pressing end 403. Specifically, the cover 170 is positioned by a pin 171 inserted into a hole in the first wall 110 and is secured to the handle 100 by a pivot 300.

[0054] Third, in this embodiment, the handle 100 includes a stop pin 180 located within the storage portion 140. When the folding portion is folded into the storage portion, it contacts the stop pin to maintain a gap between the blade and the bottom surface of the storage portion, as in the previous embodiment. This prevents the blade from impacting the bottom surface of the storage portion and being damaged during folding.

[0055] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described in detail.

[0056] Example 4 like Figure 22 As shown, this embodiment differs from Embodiment 1 only in the following aspects: First, a movable cover plate 190 is disposed on one side of the handle 100, maintaining a movable gap between the movable cover plate 190 and the handle 100. The pressing end 403 is hidden inside the movable cover plate 190 and abuts against the movable cover plate 190. Accordingly, the pressing end 403 is hidden to prevent accidental contact. In this structure, the rear end of the movable cover plate 190 is fixed to the first wall by welding, bonding, or other methods. The movable cover plate is elastic like a leaf spring and is equivalent to an extension of the pressing end 403. By pressing the movable cover plate, an axial force can be applied to the pressing end 403 to overcome the elastic force of the elastic part 500 and achieve unlocking.

[0057] Secondly, in this embodiment, the handle 100 includes a stop pin 180 located within the storage portion 140. When the folding portion is folded into the storage portion, it contacts the stop pin to maintain a gap between the blade and the bottom surface of the storage portion, as in the previous embodiment. This prevents the blade from impacting the bottom surface of the storage portion and being damaged during folding.

[0058] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described in detail.

[0059] As mentioned above, there are structural differences between the different embodiments. However, the technical features of each embodiment can be applied to other embodiments. For example, the stop pin in embodiments 2-4 can be applied to embodiment 1 to protect the blade.

Claims

1. A folding knife, characterized by: include: The handle (100) includes a first wall (110) and a second wall (120), and the first wall (110) and the second wall (120) form a storage part (140). The folding part (200) has its rear end located at the front end of the storage part (140) and is rotatably mounted on the handle (100) via a transverse pivot (300). The radial edge of its rear end is provided with a first positioning groove (201) and a second positioning groove (202). A locking pin (400) is laterally fitted to the handle (100). It includes a large-diameter section (401), a small-diameter section (402), and a pressing end (403). The pressing end (403) protrudes from the handle (100). It uses elastic force to make the large-diameter section (401) tend to engage with the first positioning groove (201) or the second positioning groove (202). Pressing the pressing end (403) overcomes the elastic force to make the large-diameter section disengage and the small-diameter section corresponds to the first positioning groove or the second positioning groove for the folding part to rotate around the pivot. An elastic part (500) that provides the elasticity is attached to the handle (100) and acts as a plate at the other end of the locking pin (400).

2. The folding knife according to claim 1, characterized in that: The pressing end (403) protrudes from the first wall (110), and the elastic part (500) is integrated with the second wall (120).

3. The folding knife according to claim 1 or 2, characterized in that: The handle (100) includes a first panel (150) and a second panel (160), the first panel (150) being attached to a first wall (110) and the second panel (160) being attached to a second wall (120).

4. The folding knife according to claim 3, characterized in that: The second panel (160) has a clearance groove (161) corresponding to the elastic part (500) on the side facing the second wall (120).

5. The folding knife according to claim 1 or 2, characterized in that: A first rolling assembly (710) is placed between the first side of the rear end of the folded portion (200) and the first wall (110), and a second rolling assembly (720) is placed between the second side of the rear end of the folded portion and the second wall (120), and a second rolling assembly ..., and a second rolling assembly (720) is placed between the second side of the rear end of the folded portion and the second wall (120).

6. The folding knife according to claim 5, characterized in that: Both the first rolling assembly (710) and the second rolling assembly (720) include a plurality of balls (702) constrained by a cage (701).

7. The folding knife according to claim 5, characterized in that: The rear end of the folded part (200) is provided with a through hole, and a bushing (600) is built into the through hole. The first rolling assembly (710) and the second rolling assembly (720) are fitted on the radial outer side of the bushing (600), and the pivot (300) passes through the bushing (600).

8. The folding knife according to claim 5, characterized in that: The pivot (300) includes a first shaft segment (301) and a second shaft segment (302), the first shaft segment (301) and the second shaft segment (302) are axially connected by threads and when the threads are tightened, the first rolling assembly (710) is pressed between the first side and the first wall (110) at the rear end of the folded portion, and the second rolling assembly (720) is pressed between the second side and the second wall (120) at the rear end of the folded portion.

9. The folding knife according to claim 1 or 2, characterized in that: The first and second walls are separate structures.

10. The folding knife according to claim 1 or 2, characterized in that: The first wall and the second wall are connected as one.

11. The folding knife according to claim 1, characterized in that: The pressing end (403) protrudes from the first wall (110), and a clip (800) is disposed on the outside of the second wall (120). The elastic part (500) is integrated with the clip (800).

12. The folding knife according to claim 11, characterized in that: The other end of the locking pin (400) protrudes from the second wall (120).

13. The folding knife according to claim 11, characterized in that: The second wall is provided with a latch (121), one end of the latch (800) is inserted into the latch (121), and the other end of the latch (800) is fastened to the handle (100) by a pivot (300).

14. The folding knife according to claim 1, characterized in that: The handle (100) includes a cover (170) that fits against the front end of the first wall (110) and a pressing end (403) protrudes from the cover (170).

15. The folding knife according to claim 14, characterized in that: The cover (170) is positioned on the first wall (110) by a pin (171) and is fastened to the handle (100) by a pivot (300).

16. The folding knife according to claim 1, characterized in that: The handle (100) includes a stop pin (180) located in the storage section (140). When the folding part (200) is folded into the storage section (140), it contacts the stop pin (180) to maintain a gap (S) between the blade (203) and the bottom surface (141) of the storage section (140).

17. The folding knife according to claim 1, characterized in that: A movable cover plate (190) is provided on one side of the handle (100). The movable cover plate (190) and the handle (100) maintain an movable gap. The pressing end (403) is hidden inside the movable cover plate (190) and abuts against the movable cover plate (190).

Images