Folding knife
By designing a special pivotal distance between the rotating part and the handle in the folding knife, the rotating part is partially housed within the handle, solving the problem of excessively long handles in existing folding knives. This achieves easier gripping, reduced size, and improved safety, while also adding more functions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
Existing folding knives have all the rotating parts retracted into the handle when folded, resulting in an excessively long handle that is unsuitable for gripping, a large product size, and limited functionality.
Design a folding knife so that the rotating part moves a certain distance outward from the handle when folded and a certain distance inward from the handle when unfolded. By utilizing the different distances between the pivot and the handle, the rotating part and the handle have a long overlap in the length direction. It is stored in part of the handle rather than the whole handle, increasing storage space to reduce volume and giving the rotating part more functions.
It achieves easy gripping and use in both folded and unfolded states, reduces product size, makes it easy to carry and store, avoids the safety hazard of exposed blades, and allows for blade replacement to extend service life.
Smart Images
Figure CN224074415U_ABST
Abstract
Description
Technical Field
[0001] This utility model pertains to manual knives, specifically a folding knife. Background Technology
[0002] In existing folding knives, the rotating part is entirely housed within the handle in the folded state. Therefore, the handle is longer than the rotating part. When the rotating part is long, the handle becomes even longer, resulting in an excessively long handle unsuitable for gripping and working, and also contributing to a larger product size. Furthermore, the rotating part has a single function and is not suitable for adding more features. Utility Model Content
[0003] This invention addresses the shortcomings of existing folding knives, where the rotating part is entirely housed within the handle in the folded state, resulting in an excessively long handle unsuitable for gripping and work, and a large product size. It provides a folding knife with the handle length controlled within a suitable range, and further enhances the functionality of the rotating part.
[0004] To achieve the above objectives, the folding knife of this utility model includes a handle and a rotating part. The handle has a front end and a rear end, and the rotating part has a first end and a second end. The first end is pivotally mounted to the front end of the handle to rotate the rotating part to a folded position or an unfolded position. The characteristic is that the distance between the pivot and the end of the first end is greater than the distance between the pivot and the end of the front end. When the rotating part is in the folded position, the first end of the rotating part protrudes forward toward the front end of the handle, causing a partial fold of the rotating part to be stored in the handle.
[0005] This design is equivalent to moving the rotating part a certain distance outward along its length when folding and moving the rotating part a certain distance inward along its length when unfolding, so that the rotating part and the handle have a relatively long overlap in the length direction. This allows the rotating part to be partially, rather than completely, folded and stored in the handle in the length direction, keeping the handle at a suitable length. This makes it easy to hold and use whether the folding knife is unfolded or folded, and it does not increase the size of the handle.
[0006] Furthermore, folding the rotating part into the handle serves two purposes: firstly, it reduces the product's size, making it easier to carry and store; secondly, it prevents the blade from being exposed and posing a safety hazard. Therefore, to avoid the safety hazard caused by an exposed blade, the blade of the rotating part is folded into the handle when folding, leaving only a portion of the non-blade part of the rotating part partially exposed on the handle to prevent any safety risks.
[0007] Preferably, the handle has a first wall and a second wall, with a storage space formed between the first wall and the second wall. When the rotating part is in the folded position, the rotating part is partially folded and stored in the storage space of the handle. The existence of the storage space not only helps to reduce the size of the product when folded, but also allows the blade to be stored in the storage space without being exposed, ensuring safety.
[0008] Preferably, the front end of the handle has a channel located between the first wall and the second wall, allowing the first end to rotate between the folded and unfolded positions. This facilitates smooth rotation of the rotating part between the unfolded and folded positions.
[0009] Preferably, the rear side of the channel has a stop portion, and the first end has a first radial profile and a second radial profile. The distance between the first radial profile and the pivot is greater than the distance between the stop portion and the pivot, and the distance between the second radial profile and the pivot is less than the distance between the stop portion and the pivot. When the rotating part is in the unfolded position, the first radial profile abuts against the stop portion, and when the rotating part rotates between the unfolded and folded positions, the second radial profile avoids the stop portion. This structure ensures smooth rotation of the rotating part between the unfolded and folded positions, and also positions the rotating part when it is in the unfolded position. In particular, it prevents the rotating part from rotating in the unfolding direction when the cutting action applies external force to the rotating part, thus providing support for the rotating part.
[0010] Preferably, the first end is configured with additional features for use when the rotating part is in the folded position. This allows the rotating part to be given more functionality.
[0011] In one embodiment, the rotating part includes a head and a blade. The blade is detachably mounted to the head, and the head is pivotally mounted to the front end of the handle to rotate the rotating part to a folded or unfolded position. Accordingly, the blade can be replaced, thereby improving cutting efficiency and extending the service life of the folding knife.
[0012] Preferably, the head is equipped with a button, and the blade is secured to the frame by a locking structure. Pressing the button causes the locking structure to be pushed open to release the locking mechanism. This structure facilitates the replacement of the blade.
[0013] Preferably, a frame that can slide between a first end and a second end is disposed inside the head, and a push button exposed outside the head for sliding the frame is connected to the frame. The blade is mounted on the frame. Accordingly, the blade can be extended out of the head by an appropriate length as needed, or the blade can be retracted into the head for concealment to ensure safety.
[0014] Preferably, the head is equipped with a button, and the blade is secured to the frame by a locking structure. The button is pressed only when the frame slides from the first end to the second end to the end of its sliding stroke, causing the button to push open the locking structure and release the locking. This structure sets the blade replacement position at the end of the frame's sliding stroke, rather than at an arbitrary position, which facilitates blade replacement and prevents the blade from accidentally falling off the frame when in other positions, ensuring safety.
[0015] Preferably, the head is provided with several positioning slots, and a push button is used to engage with one of the positioning slots to position the frame. This is used to position the blade in the corresponding position.
[0016] In one embodiment, the rotating part is a cutting blade with an integral structure.
[0017] Preferably, the rotating part has a first anti-rotation groove and a second anti-rotation groove, and the handle is provided with a protruding pin that can move back and forth. When the rotating part is in the unfolded position, the pin is inserted into the first anti-rotation groove by the elastic force of the elastic element to position the rotating part in the unfolded position. When the rotating part is in the folded position, the pin is inserted into the second anti-rotation groove by the elastic force of the elastic element to position the rotating part in the folded position. By manipulating the pin to overcome the elastic force of the elastic element, the pin is disengaged from the first or second anti-rotation groove, allowing the rotating part to rotate. Accordingly, the rotating part can be positioned in the corresponding position to ensure safety, and it is also convenient to rotate and change the position of the rotating part between the folded and unfolded positions.
[0018] Preferably, the pin is guided within the first or second wall of the handle. This allows the pin to move freely and withstand appropriate torque to reliably position the rotating part.
[0019] Preferably, the first or second wall includes a wall panel and a cover plate covering the inner side of the wall panel, with the pin secured between the wall panel and the cover plate. This provides a convenient assembly structure for the pin.
[0020] Preferably, the wall panel and the cover plate have corresponding elongated holes extending forward and backward, and elongated protrusions are provided on both sides of the pin, with the elongated protrusions located in the corresponding elongated holes. This structure not only guides the pin forward and backward but also prevents the pin from swinging, ensuring reliable positioning of the rotating part when the pin is inserted into the first or second anti-rotation groove.
[0021] This invention ensures that the distance between the pivot and the first end is greater than the distance between the pivot and the front end. When the rotating part is in the folded position, the first end of the rotating part protrudes forward towards the front of the handle, allowing a portion of the rotating part to be folded and stored within the handle. This is equivalent to moving the rotating part a certain distance outward along its length when folding and moving it a certain distance inward along its length when unfolding, resulting in a significant overlap between the rotating part and the handle in the length direction. This allows for partial, rather than complete, folding of the rotating part within the handle, maintaining the handle at a suitable length. Whether the folding knife is unfolded or folded, it is easy to grip and use without increasing the handle's size.
[0022] This invention provides an additional feature at the first end of the rotating part for use when the rotating part is in the folded position. This allows the rotating part to be given more functions. Attached Figure Description
[0023] Figure 1 This is an axonometric view of the folding knife of this utility model in its folded state.
[0024] Figure 2This is an axonometric view of the folding knife of this utility model in its folded state from another perspective;
[0025] Figure 3 This is an axonometric view of the folding knife of this utility model in its unfolded state.
[0026] Figure 4 This is an axonometric view of the folding knife of this utility model in its unfolded state.
[0027] Figure 5 This is an orthographic projection axonometric view of the folding knife of this utility model in its unfolded state;
[0028] Figure 6 This is an orthographic projection axonometric view of the folding knife of this utility model in its folded state;
[0029] Figure 7 This is a schematic diagram showing the removal of the wall panel when the folding knife of this utility model is in the unfolded state;
[0030] Figure 8 This is a schematic diagram showing the removal of the wall panel when the folding knife of this utility model is in the folded state;
[0031] Figure 9 This is a schematic diagram showing the removal of the first wall when the folding knife of this utility model is in the unfolded state;
[0032] Figure 10 This is a schematic diagram showing the removal of the first wall when the folding knife of this utility model is in the folded state;
[0033] Figure 11 This is a schematic diagram showing the rotating part of the folding knife of this utility model separated from the handle;
[0034] Figure 12 This is an exploded view of the rotating part of the folding knife of this utility model;
[0035] Figure 13 for Figure 12 A schematic diagram of the structure shown from another perspective;
[0036] Figure 14 This is an exploded view of the handle of the folding knife of this utility model;
[0037] Figure 15 for Figure 14 A schematic diagram of the structure shown from another perspective;
[0038] Explanation of the labels in the diagram:
[0039] 100 Handle, 101 Front end, 102 Rear end, 103 First wall, 104 Second wall, 105 Storage space, 106 Channel, 107 Block, 108 Pin, 109 Elastic element, 110 Wall panel, 111 Cover plate, 112 Long hole, 113 Long protrusion.
[0040] 200 Rotating part, 201 First end, 202 Second end, 203 First radial profile, 204 Second radial profile, 205 Additional feature, 206 Head, 207 Blade, 208 Button, 209 Frame, 210 Push button, 211 Positioning groove, 212 First anti-rotation groove, 213 Second anti-rotation groove, 214 Slot, 215 Elastic wall, 216 Snap fastener, 217 Pushing part, 218 Snap-fitting part, 219 Shoulder, 220 First plate, 221 Second plate, 222 Shaft;
[0041] 300 pivot, 301 screw;
[0042] The distance between the L1 pivot and the end of the first end.
[0043] The distance between the L2 pivot and the end of the front end.
[0044] The distance between the first radial profile of R1 and the pivot.
[0045] The distance between the R2 stop and the pivot.
[0046] The distance between the second radial profile of R3 and the pivot. Detailed Implementation
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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.
[0051] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.
[0052] like Figure 1-15 As shown, the folding knife includes a handle 100 and a rotating part 200. The handle 100 has a front end 101 and a rear end 102. The rotating part 200 has a first end 201 and a second end 202. The first end 201 is rotatably mounted to the front end 101 of the handle via a pivot 300 to rotate the rotating part to... Figure 1-2 The folding position shown or Figure 3-4 The unfolded position is shown. In particular, as shown... Figure 6 As shown, the distance L1 between the pivot and the first end of the rotating part is greater than the distance L2 between the pivot and the front end of the handle. When the rotating part is in the folded position, the first end of the rotating part protrudes forward towards the front end of the handle, causing a partial fold of the rotating part to be stored within the handle. This is equivalent to moving the rotating part a certain distance outward along its length direction when folding, and moving it a certain distance inward along its length direction when unfolding, resulting in a significant overlap between the rotating part and the handle in the length direction. This allows for partial, rather than complete, folding of the rotating part within the handle, maintaining a suitable handle length. Whether the folding knife is unfolded or folded, it is easy to grip and use without increasing the handle's size. Furthermore, storing the rotating part within the handle reduces the product's size, making it easier to carry and store, and avoids the safety hazard of an exposed blade. Therefore, to avoid the safety hazard of an exposed blade, storing the blade of the rotating part within the handle when folding, while allowing the non-blade portion of the rotating part to be appropriately exposed within the handle, will not cause any safety hazards.
[0053] exist Figure 4In the structure shown, the handle 100 has a first wall 103 and a second wall 104, with a storage space 105 formed between the first and second walls. When the rotating part is in the folded position, the rotating part is partially folded and stored in the storage space of the handle. The existence of the storage space not only helps to reduce the volume of the product when folded, but also allows the blade to be stored in the storage space without being exposed, ensuring safety. In specific implementations, the first wall and the second wall can be single components or assembled components.
[0054] exist Figure 11 In the structure shown, the front end of the handle 100 has a channel 106 located between the first wall and the second wall, allowing the first end to rotate between the folded and unfolded positions. This facilitates smooth rotation of the rotating part between the unfolded and folded positions.
[0055] exist Figure 11 In the structure shown, the rear side of the channel 106 has a stop portion 107 formed on the first wall and / or the second wall, and the first end 201 has a first radial profile 203 and a second radial profile 204, which are shown as corners. See also Figure 9-10 The distance R1 between the first radial profile and the pivot is greater than the distance R2 between the abutment and the pivot, and the distance R3 between the second radial profile and the pivot is less than the distance R2 between the abutment and the pivot. In the figure, the abutment, the first radial profile, and the second radial profile are located on concentric circles centered on the pivot 300, and the distances are equivalent to the radii of the concentric circles containing each part. When the rotating part is in the unfolded position, the first radial profile abuts against the abutment; when the rotating part rotates between the unfolded and folded positions, the second radial profile avoids the abutment. This structure ensures smooth rotation of the rotating part between the unfolded and folded positions and also positions the rotating part when it is in the unfolded position, especially preventing it from rotating in the unfolding direction when the cutting action applies external force, thus providing support to the rotating part.
[0056] In the illustrated structure, the first end 201 is configured with an additional feature 205 for use when the rotating part is in the folded position. This allows the rotating part to be given more functionality. The illustrated additional feature is a striking part that can be used as a hammer to perform striking; in other embodiments, other functional features may be configured according to the contour size of the first end.
[0057] In the illustrated structure, the rotating part 200 includes a head 206 and a blade 207. The blade is detachably assembled to the head, which is pivotally mounted to the front end of the handle to rotate the rotating part to a folded or unfolded position. This allows for blade replacement, improving cutting efficiency and extending the lifespan of the folding knife. In other embodiments, the rotating part is a single-piece cutting blade.
[0058] In the illustrated structure, a frame 209, slidable between a first end and a second end, is disposed within the head 206. A push button 210, protruding from the head, is connected to the frame for sliding the frame. The blade 207 is mounted on the frame 209. Accordingly, the blade can be extended beyond the head by an appropriate length as needed, or retracted into the head for concealment to ensure safety. In particular, as... Figure 10 As shown, when the rotating part is in the folded position, the blade is retracted into the head to hide it, which can reduce the length of the handle.
[0059] In the illustrated structure, the head 206 is equipped with a button 208. The blade 207 is secured to the frame 209 by a locking structure. The button is pressed only when the frame slides from the first end to the second end to the end of its sliding stroke (e.g., when the button engages with the nearest positioning slot 211 to the second end), causing the button to push open the locking structure and release the locking mechanism. This structure sets the blade replacement position at the end of the frame's sliding stroke, rather than at an arbitrary position, facilitating blade replacement and preventing the blade from accidentally falling off the frame in other positions, ensuring safety. Specifically, the locking structure includes a slot 214 for the blade 207 and a latch 216 fixed to the frame 209 by an elastic wall 215. The latch 216 has a pushing part 217 and a locking part 218. Under the action of the elastic wall 215, the latch 216 is in the locking position, and the locking part 218 engages with the slot 214 of the blade. To release the clip, press button 208. Button 208 acts on push part 217, causing push part to move to the side (to the right in the figure), and clip part 218 disengages from the blade slot 214.
[0060] In the illustrated structure, the head 206 is provided with several positioning slots 211. The push button 210 engages with one of the positioning slots 211 via its shoulder 219 to position the frame. This is used to position the blade in the corresponding position. To hold the push button within the corresponding positioning slot, a helical compression spring acts at the lower end of the push button to apply an upward elastic force. Pressing the push button downwards disengages the shoulder from the positioning slot, allowing the frame to move.
[0061] In other embodiments, the head may not have a frame; instead, the blade is directly mounted to the head. This is equivalent to discarding the frame and push button shown in the illustrated structure, and fixing the clip to the head via a flexible wall. In this case, a button is also provided on the head. The blade is clipped to the head by a locking structure; pressing the button causes the button to push open the locking structure to release the clip. This facilitates blade replacement.
[0062] For ease of assembly, the head 206 is fastened together by the first plate 220 and the second plate 221.
[0063] In the illustrated structure, the rotating part has a first anti-rotation groove 212 and a second anti-rotation groove 213, which are formed on the shaft portion 222 of the first plate. A protruding, movable pin 108 is disposed on the handle 100. When the rotating part is in the unfolded position, the pin 108 is inserted into the first anti-rotation groove 212 by the elastic force of the elastic element 109 to position the rotating part in the unfolded position. When the rotating part is in the folded position, the pin is inserted into the second anti-rotation groove 213 by the elastic force of the elastic element to position the rotating part in the folded position. By manipulating the pin to overcome the elastic force of the elastic element, the pin is disengaged from the first or second anti-rotation groove, allowing the rotating part to rotate. Therefore, the rotating part can be positioned in the appropriate position to ensure safety, and it is also convenient to rotate and reposition the rotating part between the folded and unfolded positions.
[0064] In the illustrated structure, the shaft portion 222 is rotatably mounted on the handle as a component of the pivot 300 and is constrained to the handle by a screw 301. The screw is also a component of the pivot. In other embodiments, a separate shaft can be used to pass through the handle and the rotating portion, such as by connecting two shaft segments together by threads to form a pivot.
[0065] In the illustrated configuration, pin 108 is guided within the first wall of the handle. This allows the pin to move freely and withstand appropriate torque to reliably position the rotating portion. In other embodiments, pin 108 is guided within the second wall of the handle.
[0066] In the illustrated structure, the first wall (or the second wall in other embodiments) includes a wall panel 110 and a cover plate 111 covering the inner side of the wall panel, with the pin 108 constrained between the wall panel 110 and the cover plate 111. This provides a convenient assembly structure for the pin. In particular, the wall panel 110 and the cover plate 111 have corresponding elongated holes 112 extending forward and backward, and the pin 108 has elongated protrusions 113 on both sides, with the elongated protrusions 113 located within the corresponding elongated holes 112. This structure guides the pin forward and backward while preventing the pin from swinging, ensuring reliable positioning of the rotating part when the pin is inserted into the first or second anti-rotation groove.
Claims
1. A folding knife, comprising a handle (100) and a rotating part (200), the handle (100) having a front end (101) and a rear end (102), the rotating part (200) having a first end (201) and a second end (202), the first end (201) being rotatably mounted to the front end (101) of the handle via a pivot (300) for rotating the rotating part to a folded position or an unfolded position, characterized in that: The distance (L1) between the pivot and the end of the first end is greater than the distance (L2) between the pivot and the end of the front end. When the rotating part (200) is in the folded position, the first end (201) of the rotating part protrudes forward toward the front end (101) of the handle, causing the rotating part to be partially folded and stored in the handle.
2. The folding knife according to claim 1, characterized in that: The handle (100) has a first wall (103) and a second wall (104), and a storage space (105) is formed between the first wall and the second wall. When the rotating part is in the folded position, the rotating part is partially folded and stored in the storage space of the handle.
3. The folding knife according to claim 2, characterized in that: The front end (101) of the handle has a channel (106) located between the first wall (103) and the second wall (104) for the first end (201) to rotate between the folded position and the unfolded position.
4. The folding knife according to claim 3, characterized in that: The rear side of the channel has a stop (107), and the first end (201) has a first radial profile (203) and a second radial profile (204). The distance (R1) between the first radial profile and the pivot is greater than the distance (R2) between the stop and the pivot, and the distance (R3) between the second radial profile and the pivot is less than the distance (R2) between the stop and the pivot. When the rotating part is in the unfolded position, the first radial profile (203) abuts against the stop (107), and when the rotating part rotates between the unfolded position and the folded position, the second radial profile (204) avoids the stop (107).
5. The folding knife according to any one of claims 1-4, characterized in that: The first end (201) is configured with an additional feature (205) to use the additional feature when the rotating part is in the folded position.
6. The folding knife according to any one of claims 1-4, characterized in that: The rotating part (200) includes a head (206) and a blade (207). The blade is detachably assembled to the head, and the head is pivotally mounted to the front end of the handle to rotate the rotating part to a folded or unfolded position.
7. The folding knife according to claim 6, characterized in that: The head (206) is provided with a button (208). The blade is locked in the head by a locking structure. Pressing the button causes the button to push open the locking structure to release the locking.
8. The folding knife according to claim 6, characterized in that: The head (206) is equipped with a frame (209) that can slide between a first end and a second end. A push button (210) exposed outside the head for sliding the frame is connected to the frame. The blade (207) is mounted on the frame (209).
9. The folding knife according to claim 8, characterized in that: The head is equipped with a button, and the blade (207) is locked to the frame (209) by a locking structure. The locking is released only when the frame (209) slides from the first end to the second end to the end of its sliding stroke. Pressing the button causes the button to push open the locking structure.
10. The folding knife according to claim 8, characterized in that: The head (206) is provided with several positioning slots (211), and the push button (210) can be selected to engage with a positioning slot to position the frame.
11. The folding knife according to any one of claims 1-4, characterized in that: The rotating part (200) is a cutting blade with an integral structure.
12. The folding knife according to any one of claims 1-4, characterized in that: The rotating part (200) has a first anti-rotation groove (212) and a second anti-rotation groove (213). The handle (100) is provided with a protruding pin (108) that can move back and forth. When the rotating part is in the unfolded position, the pin (108) is inserted into the first anti-rotation groove (212) by the elastic force of the elastic element (109) to position the rotating part in the unfolded position. When the rotating part is in the folded position, the pin (108) is inserted into the second anti-rotation groove (213) by the elastic force of the elastic element (109) to position the rotating part in the folded position. By manipulating the pin (108) to overcome the elastic force of the elastic element (109), the pin (108) is disengaged from the first anti-rotation groove or the second anti-rotation groove to allow the rotating part to rotate.
13. The folding knife according to claim 12, characterized in that: The pin (108) is guided within the first wall (103) or the second wall (104) of the handle.
14. The folding knife according to claim 13, characterized in that: The first wall (103) or the second wall (104) includes a wall panel (110) and a cover plate (111) covering the inside of the wall panel, and a pin (108) is constrained between the wall panel (110) and the cover plate (111).
15. The folding knife according to claim 14, characterized in that: The wall panel (110) and the cover plate (111) have corresponding elongated holes (112) extending forward and backward. The pin (108) has elongated protrusions (113) on both sides, and the elongated protrusions (113) are located in the corresponding elongated holes (112).