Folding knife with blade spring arm construction
By introducing an elastic arm structure into the folding knife, and utilizing the damping effect and limiting design of the locking and connecting parts, the safety, stability, and feel issues of the folding knife are solved, achieving a safe, stable, and comfortable user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 阳江市利瓷科技有限公司
- Filing Date
- 2025-07-30
- Publication Date
- 2026-08-04
AI Technical Summary
Existing folding knives are not safe enough, have poor stability, and are not easy to handle. In particular, they are prone to causing cuts and have low cutting accuracy when the blade opens and closes at high speeds.
It adopts a blade elastic arm structure. By setting an elastic arm between the blade and the handle, the cooperation of the locking part and the locking part provides rotational damping, slowing down the opening and closing speed of the blade. The blade unfolding angle is limited by the limiting protrusion and the recess, which improves the grip comfort.
It effectively slows down the opening and closing speed of the blade, avoids cuts, improves cutting accuracy and safety, enhances grip comfort, and ensures that the blade is stably extended to the appropriate angle.
Smart Images
Figure CN224588108U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cutting tool technology, and in particular to a folding cutting tool with a blade elastic arm structure. Background Technology
[0002] Folding knives are commonly used tools in daily life. Compared to non-folding knives, folding knives are much smaller and easier to carry, and the blade can be folded into the handle, making them safer to carry. This has led to their increasingly widespread use. Current folding knives typically consist of a handle and a blade. Generally, a groove for holding the blade is provided inside the handle, and the blade is screwed into the handle around a pivot assembly.
[0003] However, the traditional folding knife design has the following defects: (1) Insufficient safety: the blade opens and closes quickly without buffering, which can easily cause cuts; (3) Poor stability: the blade is easy to shake after unfolding, which affects the cutting accuracy; (4) Poor feel: the grip area lacks ergonomic design and is uncomfortable to use for a long time.
[0004] Therefore, a technical solution to the above problems is needed. Utility Model Content
[0005] In order to solve the technical problems existing in the prior art, the purpose of this utility model is to provide a folding knife with a blade elastic arm structure to solve the above-mentioned technical problems.
[0006] To achieve its purpose, the present invention adopts the following technical solution: A folding knife with a blade elastic arm structure includes a handle and a blade rotatably mounted on one end of the handle. One of the blade and the handle is provided with an elastic arm, which has a locking part, and the other is provided with a locking part that cooperates with the locking part. When the blade rotates relative to the handle, the elastic arm deforms elastically, causing the engaging part to disengage from the locking part. The engaging part and the locking part cooperate to provide rotational damping, thereby slowing down the opening and closing speed of the blade.
[0007] In some embodiments, the knife handle includes a symmetrical first handle and a second handle, the first handle or the second handle having an annular protrusion, and the blade connecting end having an annular structure and being fitted onto the outside of the annular protrusion, so that the blade can be rotatably mounted on the knife handle.
[0008] In some embodiments, the annular structure on the blade is provided with a notch, so that the annular structure forms the elastic arm that can elastically deform.
[0009] In some embodiments, the engaging portion is an arc-shaped recess provided on the elastic arm, and the engaging portion is an arc-shaped protrusion provided on the outer peripheral surface of the annular protrusion.
[0010] In some embodiments, the number of the arc-shaped recesses is the same as the number of the arc-shaped protrusions.
[0011] In some embodiments, the elastic arm is two arc-shaped arms disposed on the outer side of the annular protrusion.
[0012] In some embodiments, the annular protrusion has two notches on symmetrical sides, so that the annular protrusion forms two elastically deformable elastic arms on the first or second grip.
[0013] In some embodiments, the shank has a limiting protrusion and the blade has a limiting recess. When the blade rotates relative to the shank, the limiting protrusion is limited to move within the limiting recess.
[0014] In some embodiments, the blade has a circular hole for gripping at the connection point with the handle.
[0015] In some embodiments, when the first grip is connected to the second grip, a storage groove for receiving the blade is formed between the first grip and the second grip.
[0016] The folding knife with the blade elastic arm structure of this utility model has an elastic arm between the blade and the handle, which allows the locking part and the locking part to be elastically disengaged. The deformation of the elastic arm provides damping, slows down the opening and closing speed of the blade, avoids rapid bouncing and cutting, and can be opened and closed with one hand.
[0017] The folding knife with a blade elastic arm structure of this utility model is equipped with a limiting protrusion and a limiting recess to limit the blade unfolding angle, so that the blade can be unfolded to a suitable use angle and then fixed, making it convenient to use.
[0018] The folding knife with a flexible blade arm structure of this utility model has a circular hole design at the connection between the blade and the handle to fit the fingers and improve grip comfort. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a perspective view of the folding knife with a blade elastic arm structure in Embodiment 1 of this utility model; Figure 2 This is an exploded structural diagram of the folding knife with a blade elastic arm structure in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the blade structure in Embodiment 1 of this utility model; Figure 4 This is a perspective view of the first grip in Embodiment 1 of this utility model; Figure 5 This is a perspective view of the second grip in Embodiment 1 of this utility model; Figure 6 This is a perspective view of the blade mounted on the first sleeve in Embodiment 1 of this utility model; Figure 7 This is a perspective view of another embodiment of the present invention, showing the blade mounted on the first sheath. Figure 8 This is a perspective view of the blade mounted on the first sheath in Embodiment 2 of this utility model; Figure 9 This is a perspective view of the blade installed on the first sheath in Embodiment 3 of this utility model. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] It should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0025] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0026] Example 1 like Figures 1 to 7 As shown, a folding knife with a blade elastic arm structure (hereinafter referred to as the knife) includes a blade 100 and a handle 200. The blade 100 is rotatably mounted on one end of the handle 200, allowing the blade 100 to be folded on the handle 200. One of the blade 100 and the handle 200 has an elastic arm 600a structure. The elastic arm 600a has a locking part 610a, and the other has a locking part 700. The locking part 610a and the locking part 700 can cooperate with each other. When the folding knife is folded, the blade 100 and the handle 200 rotate relative to each other, and the elastic arm 600a can elastically deform, causing the locking part 610a and the locking part 700 to disengage, allowing the blade 100 and the handle 200 to rotate. The knife of this utility model can be operated with one hand when folding, and the knife feels comfortable in the hand. Through the cooperation of the locking part 610a and the locking part 700 on the elastic arm 600a, the speed and deviation of the knife blade 100 and the knife handle 200 can be slowed down when rotating.
[0027] Among them, see Figures 2 to 6 Both the blade 100 and the handle 200 have a circular structure 300 at one end. The blade 100 and the handle 200 are rotatably connected through the circular structure 300, so that the blade 100 can be folded on the handle 200.
[0028] Preferably, the knife is provided with a circular hole 400 at the connection between the blade 100 and the handle 200. The circular hole 400 makes it convenient for the user to hold the knife during use, which can improve the comfort and feel of the knife.
[0029] Specifically, in this embodiment, the circular structure 300 of the blade 100 and the handle 200 are provided with a circular hole 400. The circular hole 400 of the blade 100 is larger than the circular hole 400 of the handle 200. When the blade 100 and the handle 200 are connected, the two circular holes are positioned correspondingly, so that the connection between the blade 100 and the handle 200 has a circular hole 400 for holding the knife when using it.
[0030] Preferably, the handle 200 includes a first grip 210 and a second grip 220. The first grip 210 and the second grip 220 are symmetrical in shape. One can be installed on the left side of the blade 100 and the other can be installed on the right side of the blade 100. They are then fixed by a fastener to form the handle 200 part of the knife that is held by hand.
[0031] Furthermore, an annular protrusion 230 is provided on one of the first grip 210 and the second grip 220. The circular structure 300 of the blade 100 is hollow in the middle, so that the end of the blade 100 connected to the handle 200 is an annular structure. When the blade 100 and the handle 200 are connected, the annular structure of the blade 100 is fitted over the annular protrusion 230 of one of the first grip 210 and the second grip 220, so that the blade 100 can be rotatably mounted on one end of the handle 200. The blade 100 can be folded relative to the handle 200, and the center of the annular protrusion 230 coincides with the center of the circular structure 300 of the blade 100, which can be the circular hole 400 on the knife.
[0032] It also includes a limiting protrusion 240 on the tool holder 200 and a limiting recess 110 on the blade 100. When the blade 100 rotates relative to the tool holder 200, the limiting protrusion 240 can move within the limiting recess 110. When the edge of the limiting protrusion 240 contacts the edge of the limiting recess 110, the blade 100 is limited and can no longer rotate relative to the tool holder 200, so that the blade 100 of the tool can be unfolded to a suitable use angle and then fixed for use.
[0033] Specifically, in this embodiment, the limiting recess 110 is an approximately 180-degree arc-shaped recess provided on the circular structure 300 near the end of the handle 200 of the blade 100, and the limiting protrusion 240 is a circular protrusion provided on the upper part of the circular structure 300 of the handle 200. When the blade 100 is rotatably mounted on the handle 200, the limiting protrusion 240 can move within the arc-shaped recess. When the limiting protrusion 240 contacts both sides of the limiting recess 110, the blade 100 cannot rotate relative to the handle 200, allowing the blade 100 to rotate approximately 180 degrees relative to the handle 200.
[0034] Preferably, when the first grip 210 and the second grip 220 are connected, there is a storage groove 250 in the middle, so that when the blade 100 is folded, it can be stored in the storage groove 250 to ensure the safety of the blade when it is not in use.
[0035] Specifically, in this embodiment, when one of the first grip sleeve 210 and the second grip sleeve 220 is provided with a limiting protrusion 240, the other is provided with a groove 251. When the first grip sleeve 210 and the second grip sleeve 220 are installed together, the limiting protrusion 240 and the groove 251 are positioned correspondingly, the limiting protrusion 240 is inserted into the groove 251, and the height of the limiting protrusion 240 is greater than the depth of the groove, so that there is a gap between the first grip sleeve 210 and the second grip sleeve 220. This gap can be used as the first grip sleeve 210. A partial storage groove 250 between the first and second grip sleeves 210 and 220; and one of the first and second grip sleeves 210 and 220 is provided with a protrusion 252 at the end not connected to the blade 100. When the first and second grip sleeves 210 and 220 are connected to each other, the protrusion 252 is located between the first and second grip sleeves 210 and 220, so that the first and second grip sleeves 210 and 220 also have a gap at the end not connected to the blade 100, forming another partial storage groove 250 that can accommodate the blade 100.
[0036] Preferably, a notch 500a is provided on the annular structure connecting the blade 100 and the handle 200, so that the annular structure of the blade 100 forms two elastic arms 600a.
[0037] Specifically, in this embodiment, the engaging part 610a is an arc-shaped recess located inside the elastic arm 600a, and the engaging part 700 is an arc-shaped protrusion located on the outer periphery of the annular protrusion 230. The number and shape of the arc-shaped recess and the arc-shaped protrusion are matched, and the arc-shaped recess and the arc-shaped protrusion can engage with each other. When the blade 100 rotates relative to the handle 200, the arc-shaped protrusion and the arc-shaped recess make it easier for the engaging part 610a and the engaging part 700 to be disengaged by force, which facilitates the rotation of the blade 100 and the cutting tool.
[0038] It is understood that in some other embodiments, the number of arcuate recesses may not be the same as the number of arcuate protrusions, for example, see [reference]. Figure 7 As shown, the notch 500a of the blade 100 can be configured as an arc-shaped recess that mates with the arc-shaped protrusion. Similarly, in some other embodiments, an arc-shaped recess can be provided on the elastic arm 600a, and an arc-shaped protrusion can be provided on the annular protrusion 230, as long as the engaging part 610a and the engaging part 700 can mate, and there is no limitation here.
[0039] When using the folding knife with the elastic arm 600a structure of the blade 100 of this utility model, the blade 100 can be rotated on the handle 200. When the limiting protrusion 240 on the handle 200 and the limiting recess 110 on one side are limited, the blade 100 is fully unfolded. Then, when the blade 100 is rotated on the handle 200, when the limiting protrusion 240 on the handle 200 and the limiting recess 110 on the blade 100 on the other side are limited, the blade 100 is folded and stored in the storage groove 250 of the handle 200.
[0040] During this process, the engaging part 610a and the engaging part 700 can cooperate with each other to slow down the speed and deviation of the cutting blade 100 and the handle 200 when they rotate, so as to avoid the occurrence of cuts when the cutting blade 100 and the handle 200 fold quickly.
[0041] The folding knife with a blade elastic arm structure in this embodiment has a circular hole 400 for easy gripping by the user. When the blade 100 and the handle 200 rotate, the speed and deviation of the blade retraction and extension can be reduced to ensure safe use.
[0042] Example 2 refer to Figure 8 This embodiment provides another type of folding knife with a blade elastic arm structure. The difference between this embodiment and the first embodiment is that in this embodiment, the end where the blade 100 is connected to the handle 200 does not have a notch 500a, and the elastic arm 600b is provided on the handle 200.
[0043] Specifically, see Figure 8 In this embodiment, the elastic arm 600b has an annular protrusion 230 on the outside of two arc-shaped arms, and the outer side of the elastic arm 600b has an arc-shaped protrusion, which is a locking part 610b. The inner side of the annular structure of the blade 100 has an arc-shaped recess, which is a locking part 700. When the blade 100 is installed on the handle 200, the arc-shaped protrusion can cooperate with the arc-shaped recess. When the blade 100 rotates relative to the handle 200, the arc-shaped protrusion and the arc-shaped recess make it easier for the locking part 610b and the locking part 700 to be disengaged by force, which facilitates the rotation of the blade 100 and the cutting tool.
[0044] In this embodiment, the other structures of the folding knife with the blade 100 elastic arm 600b type structure are similar to those in the previous embodiments, and will not be described in detail here.
[0045] Example 3 refer to Figure 9This embodiment provides another type of folding knife with a blade elastic arm structure. The difference between this embodiment and the second embodiment is that in this embodiment, the elastic arm 600c is not set on the outside of the annular protrusion 230 as two arc-shaped arms, but a notch 500c is set on the annular protrusion 230 so that the annular protrusion 230 forms two elastic arms 600c.
[0046] Specifically, in this embodiment, the annular protrusion 230 has two notches 500c on symmetrical sides, so that the annular protrusion 230 forms two elastic arms 600c, and the annular protrusion 230 can be elastically deformed with the first handle 210 or the second handle 220. The outer side of the elastic arm 600c has an arc-shaped protrusion, and the inner side of the annular structure of the blade 100 has an arc-shaped recess. When the blade 100 is installed on the handle 200, the arc-shaped protrusion can cooperate with the arc-shaped recess. When the blade 100 rotates relative to the handle 200, the arc-shaped protrusion and the arc-shaped recess make it easier for the engaging part and the engaging part 700 to be disengaged by force, which facilitates the rotation of the blade 100 and the cutting tool.
[0047] In this embodiment, the other structures of the folding knife with the blade 100 elastic arm 600c type structure are similar to those in the previous embodiments, and will not be described in detail here.
[0048] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.
Claims
1. A folding knife with a blade elastic arm structure, comprising a handle and a blade rotatably mounted on one end of the handle, characterized in that: One of the blade and the handle is provided with an elastic arm, the elastic arm is provided with a locking part, and the other is provided with a locking part that cooperates with the locking part; When the blade rotates relative to the handle, the elastic arm deforms elastically, causing the engaging part to disengage from the locking part. The engaging part and the locking part cooperate to provide rotational damping, thereby slowing down the opening and closing speed of the blade.
2. The folding knife with a blade elastic arm structure according to claim 1, characterized in that, The knife handle includes a symmetrical first handle and a second handle. The first handle or the second handle has an annular protrusion. The blade connection end has an annular structure and is fitted on the outside of the annular protrusion, so that the blade can be rotatably mounted on the knife handle.
3. The folding knife with a blade elastic arm structure according to claim 2, characterized in that, The annular structure on the blade has a notch, so that the annular structure forms the elastic arm that can be elastically deformed.
4. The folding knife with a blade elastic arm structure according to claim 3, characterized in that, The engaging portion is an arc-shaped recess provided on the elastic arm, and the engaging portion is an arc-shaped protrusion provided on the outer circumferential surface of the annular protrusion.
5. The folding knife with a blade elastic arm structure according to claim 4, characterized in that, The number of arc-shaped depressions is the same as the number of arc-shaped protrusions.
6. The folding knife with a blade elastic arm structure according to claim 2, characterized in that, The elastic arm consists of two arc-shaped arms positioned on the outer side of the annular protrusion.
7. The folding knife with a blade elastic arm structure according to claim 2, characterized in that, The annular protrusion has two notches on symmetrical sides, so that the annular protrusion forms two elastically deformable elastic arms on the first grip or the second grip.
8. The folding knife with a blade elastic arm structure according to any one of claims 1-7, characterized in that, The handle is provided with a limiting protrusion, and the blade is provided with a limiting recess. When the blade rotates relative to the handle, the limiting protrusion is limited to move within the limiting recess.
9. The folding knife with a blade elastic arm structure according to any one of claims 1-7, characterized in that, The blade has a circular hole for gripping at the connection point with the handle.
10. The folding knife with a blade elastic arm structure according to any one of claims 2-7, characterized in that, When the first grip is connected to the second grip, a storage groove for storing the blade is formed between the first grip and the second grip.