A retractable shear

Abstract

This utility model discloses a retractable scissor that can completely house the scissor blades within a cavity, has a compact overall structure, and is small in size and easy to carry after storage. It includes a first outer shell, a second outer shell, a first scissor blade, a second scissor blade, and a compression spring. The first and second outer shells are detachably fastened together, with an opening at the top forming an internal receiving cavity. The first and second scissor blades are rotatably connected, and their inner sides are elastically connected via the compression spring. The receiving cavity has a slot. The tails of the first and second scissor blades have protrusions that match the slot. The protrusions are slidably embedded in the slot. In its natural state, the tops of the first and second scissor blades are open. By pressing inward on both sides of the first and second scissor blades, the compression spring is compressed, causing the tops of the first and second scissor blades to extend from the opening and close, thus achieving the cutting function.

Description

Technical Field

[0001] This utility model relates to the field of scissors technology, specifically to a retractable scissor. Background Technology

[0002] Fishing line cutters are an essential tool for fishing activities, used to cut fishing lines and other fishing materials. Currently, fishing line cutters on the market are mainly divided into three categories: traditional fixed scissors, folding scissors, and telescopic scissors.

[0003] Traditional fixed-blade scissors have a simple structure, consisting of two hinged blades and a handle. However, they are relatively bulky, taking up space in a fishing tackle bag when carried, and the exposed blades are prone to snagging other items, potentially causing accidental injury to the user. For example, when using ordinary household scissors to cut fishing line, the fixed handle length makes them difficult to store in a narrow fishing tackle bag, and the lack of protective structure on the blades makes them prone to rusting after long-term storage, affecting cutting accuracy.

[0004] Folding scissors use a hinged structure to fold and store the blades, reducing their size to some extent. However, the connection strength at the folding point is relatively weak, and they are prone to loosening or jamming after prolonged use. For example, some folding scissors use a single-axis hinge at the connection between the blade and the handle. When cutting thicker fishing line, the force is concentrated at the hinge point, which can easily cause the axis to deform, preventing the blade from folding or unfolding smoothly. In addition, the reset function of folding scissors mainly relies on manual operation by the user, lacking an automatic reset function, resulting in poor ease of use.

[0005] While existing telescopic fishing line cutters solve the portability problem, they suffer from drawbacks such as cutting misalignment and unreliable resetting. For example, some telescopic cutters extend and retract by sliding along a groove, but the gap between the groove and the cutter is too large, causing the cutter to easily shift left and right during cutting, resulting in blade misalignment and inaccurate cutting of the fishing line. Some products use springs as a resetting element, but improper spring placement can lead to spring fatigue or detachment after prolonged use, preventing the cutter from fully resetting and affecting future use.

[0006] Furthermore, the existing blade fixing structure of fishing line cutters is not stable enough. For example, blades fixed with a single screw are prone to loosening after high-frequency cutting, leading to deviations in the blade rotation angle and further reducing cutting accuracy. In summary, existing fishing line cutters still have shortcomings in terms of portability, cutting stability, reset reliability, and structural durability. There is an urgent need for a telescopic fishing line cutter that is compact in structure, stable in operation, reliable in reset, and easy to maintain. Utility Model Content

[0007] The present invention aims to overcome at least one of the defects of the prior art and provide a telescopic shear to achieve convenient and stable operation and reliable resetting.

[0008] Specifically, this utility model provides a retractable shear, including a first outer shell, a second outer shell, a first shear blade, a second shear blade, and a compression spring; the first and second outer shells are detachably fastened together, with an opening at the top and an internal receiving cavity; the first and second shear blades are rotatably connected, and their inner sides are elastically connected by the compression spring; the receiving cavity has a slot; the tails of the first and second shear blades have protrusions that match the slots; the protrusions are slidably embedded in the slots; in the natural state, the tops of the first and second shear blades are open; by pressing inward on both sides of the first and second shear blades, the compression spring is compressed, causing the tops of the first and second shear blades to extend from the openings and close, thus achieving the shearing function.

[0009] This invention overcomes several shortcomings of existing technologies through the collaborative work of multiple components. First, the first and second shear blades can be completely housed within the receiving cavity, reducing the volume by more than 40% compared to traditional fixed scissors, making them easier to carry and preventing blade exposure. Second, the cooperation between the protrusion and the groove ensures that the first and second shear blades do not shift left or right during sliding and cutting, significantly improving cutting accuracy and ensuring precise alignment with the fishing line with each cut. Furthermore, the direct connection between the first and second shear blades using a compression spring provides uniform and durable reset force. After cyclic testing, the reset success rate remains at 100%, solving the reset jamming problem of existing products. In addition, the retractable scissors of this invention are simple to assemble, easy to repair and replace, and reduce maintenance costs.

[0010] Furthermore, the first scissor blade includes a first cutting edge portion and a first handle portion that are fixedly connected; the second scissor blade includes a second cutting edge portion and a second handle portion that are fixedly connected; the first cutting edge portion and the second cutting edge portion are rotatably connected, and their tails are elastically connected by the compression spring; the protrusion is provided on the first handle portion and the second handle portion.

[0011] By pressing the first and second handle sections, the compression spring is stressed. At this time, the protrusions on the first and second handle sections slide upwards along the groove, causing the first and second cutting edges to extend from the opening and close, thus achieving the cutting function. Releasing the first and second handle sections allows the compression spring to return the protrusions to their original position along the groove, while the first and second cutting edges retract from their extended, closed state and open, achieving overall retraction. Furthermore, the design of the protrusions on the handle sections ensures that the pressing force acts directly on the sliding fulcrum, reducing motion loss and allowing for smoother shear blade extension and retraction.

[0012] Furthermore, the tail portions of both the first and second handle portions are each provided with two protruding pillars, forming a dual-point support. Compared to a single-protruding-pillar structure, this significantly improves lateral stability. A single protruding pillar is prone to uneven force distribution, causing the shear blade to wobble. The dual protruding pillars, through two-point positioning, limit the rotational offset of the shear blade, resulting in higher blade alignment accuracy during cutting and preventing incomplete cutting due to misalignment. In addition, the dual protruding pillars disperse friction during sliding, reducing wear on individual protruding pillars and extending the component's lifespan.

[0013] Furthermore, the inner walls of the first and second outer shells are each provided with a set of slots. The double slot design matches the double convex pillar structure, making the overall operation more stable.

[0014] Furthermore, the slot is V-shaped, with two protrusions on the first and second handle portions respectively embedded in the slot. The special shape of the "V-shaped slot" allows for the coordinated extension and closure of the first and second cutting edges: when the first and second handle portions are pressed, the protrusions slide along the V-shaped slot from the wide end to the narrow end. The inclination angle of the slot naturally guides the first and second cutting edges to rotate around the intersection point, causing the top blade to gradually close, without the need for additional structural angle control. In addition, the narrow end of the V-shaped slot limits excessive sliding of the protrusions, acting as a travel limiter and preventing structural damage caused by excessive shear blade extension.

[0015] Furthermore, a limiting groove is provided inside the receiving cavity; the first cutting edge and the second cutting edge are rotatably connected by a connector, which is embedded in the limiting groove.

[0016] The "limiting groove and connector" structure provides additional constraint at the intersection of the first and second shear blades. After the connector is embedded in the limiting groove, it restricts the lateral displacement of the first and second cutting edges during extension and retraction, ensuring that the first and second cutting edges remain aligned during extension and cutting. Even when cutting stiff wires, the blades will not misalign due to force displacement. The limiting groove also provides a movement track for the connector, guiding the first and second cutting edges along a fixed path to prevent jamming caused by shaking.

[0017] Furthermore, the limiting groove is n-shaped. The corners of the n-shaped groove are rounded to reduce frictional resistance when the connector slides, making the shear blade extend and retract more smoothly. At the same time, the end of the n-shaped groove can serve as the endpoint positioning of the shear blade extension, ensuring that the blade extension length is consistent each time it cuts, improving the repeatability of the operation, and making it particularly suitable for scenarios requiring precise cutting.

[0018] Furthermore, the connector is a center screw.

[0019] Furthermore, the inner side of the tail of the first handle and the second handle is provided with a locking post, and the two ends of the compression spring are respectively sleeved and fixed to the locking post, so that the force points at both ends of the compression spring are clear and the compression spring is prevented from shifting or falling off during the extension and retraction process.

[0020] Furthermore, the tail of the first and / or second housing is provided with a hook; the outer sides of the first and second handle portions are provided with anti-slip textures.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] The first and second outer shells of this utility model can be detachably fastened together to form a receiving cavity, which can completely store the scissors inside the cavity, avoiding the blade from being exposed and effectively preventing accidental injury or dust contamination. Compared with traditional exposed scissors, the safety is improved. Moreover, the overall structure is compact and the size is small after storage, making it more convenient to carry than folding scissors, especially suitable for outdoor fishing, camping and other scenarios.

[0023] Furthermore, the convex post at the tail of the shear blade of this utility model slides into the groove of the receiving cavity, and the combination of the double convex post design and the symmetrical groove layout on the inner wall of the outer shell forms a stable guiding structure, which limits the lateral displacement of the shear blade, making the blade alignment accuracy higher during shearing and avoiding incomplete shearing due to misalignment; the figure-eight groove realizes the linkage of extension and closure, and the n-shaped limiting groove cooperates with the central screw to further constrain the movement trajectory and reduce jamming. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the telescopic shear of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of the telescopic shear of this utility model.

[0026] Figure 3 This is an exploded structural diagram of the telescopic shear of this utility model.

[0027] Figure 4 This is a schematic diagram of the internal structure of the first and second outer shells of the telescopic shear of this utility model. Detailed Implementation

[0028] The accompanying drawings illustrate the technical solutions of this utility model in more detail. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are only some, not all, of the embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application. Example

[0031] This embodiment provides a telescopic shear, such as Figure 1 and 2 As shown, it includes a first outer shell 1, a second outer shell 2, a first shear blade 3, a second shear blade 4, and a compression spring 5; the first outer shell 1 and the second outer shell 2 are detachably fastened together, with an opening 10 at the top and an internal receiving cavity; the first shear blade 3 and the second shear blade 4 are rotatably connected, and the inner sides of the first shear blade 3 and the second shear blade 4 are elastically connected by the compression spring 5; combined with Figure 3 As shown, the first scissor blade 3 includes a first cutting edge portion 31 and a first handle portion 32 that are fixedly connected; the second scissor blade 4 includes a second cutting edge portion 41 and a second handle portion 42 that are fixedly connected; the first cutting edge portion 31 and the second cutting edge portion 41 are rotatably connected, and their tails are elastically connected by the compression spring 5.

[0032] like Figure 4As shown, the first outer shell 1 and the second outer shell 2 are provided with a slot 20 and a limiting groove 30; the slot 20 is V-shaped, and the limiting groove 30 is n-shaped. The tail portions of the first handle portion 32 and the second handle portion 42 are respectively provided with two protrusions 40 that match the slot 20; the two protrusions 40 of the first handle portion 32 and the second handle portion 42 are respectively embedded in the slot 20. Combined Figures 2-3 As shown, the first cutting edge 31 and the second cutting edge 41 are rotatably connected by a central screw 6, which is embedded in the limiting groove 30. The central screw 6 is detachably connected by a male and female screw.

[0033] In its natural state, the tops of the first shear blade 3 and the second shear blade 4 are open. By pressing the sides of the first shear blade 3 and the second shear blade 4 inward, the compression spring 5 is compressed, causing the tops of the first shear blade 3 and the second shear blade 4 to extend out of the opening 10 and close, thus achieving the shearing function.

[0034] Combination Figures 2-3 As shown, the inner side of the tail of the first handle portion 32 and the second handle portion 42 is provided with a locking post 50, and the outer side is provided with anti-slip texture 60. The two ends of the compression spring 5 are respectively sleeved and fixed to the locking post 50, so that the force points at both ends of the compression spring 5 are clear, and the compression spring 5 is prevented from shifting or falling off during the extension and retraction process. The tail of the first outer shell 1 is provided with a hook 70. The tail of the first outer shell 1 is bent to form an elastic hook with the hook 70.

[0035] By pressing the first handle portion 32 and the second handle portion 42, the compression spring 5 is stressed. At this time, the two protrusions 40 on the front and back of the first handle portion 32 and the second handle portion 42 slide upward along the V-shaped groove 20, causing the first blade portion 31 and the second blade portion 41 to extend from the opening 10 and close to achieve the cutting function. When the first handle portion 32 and the second handle portion 42 are released, under the rebound force of the compression spring 5, the protrusions 40 return to their original position along the V-shaped groove 20. At the same time, the first blade portion 31 and the second blade portion 41 retract from the extended closed state to the opening 10 and open, achieving overall storage.

[0036] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model should not depart from the spirit and scope of this utility model. Those skilled in the art can also make other changes within the spirit of this utility model for its design, as long as they do not deviate from the technical effect of this utility model. These changes made according to the spirit of this utility model should all be included within the scope of protection claimed by this utility model.

Claims

1. A telescopic shear, characterized in that, It includes a first outer shell (1), a second outer shell (2), a first shearing blade (3), a second shearing blade (4), and a compression spring (5); the first outer shell (1) and the second outer shell (2) are detachably fastened together, and an opening (10) is provided at the top, forming an internal receiving cavity; The first shear blade (3) and the second shear blade (4) are rotatably connected, and the inner sides of the first shear blade (3) and the second shear blade (4) are elastically connected by the compression spring (5); The cavity is provided with a slot (20); the tail of the first shear blade (3) and the second shear blade (4) are provided with a protrusion (40) that matches the slot (20); the protrusion (40) is slidably embedded in the slot (20); In its natural state, the tops of the first scissor blade (3) and the second scissor blade (4) are open; by pressing the sides of the first scissor blade (3) and the second scissor blade (4) inward, the tops of the first scissor blade (3) and the second scissor blade (4) extend out of the opening (10) and close.

2. The telescopic shears according to claim 1, characterized in that, The first scissor blade (3) includes a first cutting edge (31) and a first handle (32) that are fixedly connected; the second scissor blade (4) includes a second cutting edge (41) and a second handle (42) that are fixedly connected. The first cutting edge (31) and the second cutting edge (41) are rotatably connected, and the tail is elastically connected by the compression spring (5); the protrusion (40) is provided on the first handle part (32) and the second handle part (42).

3. The telescopic shears according to claim 2, characterized in that, The tail portions of the first handle portion (32) and the second handle portion (42) are respectively provided with two protrusions (40).

4. The telescopic shears according to claim 3, characterized in that, The inner walls of the first outer shell (1) and the second outer shell (2) are respectively provided with a set of slots (20).

5. The telescopic shears according to claim 4, characterized in that, The slot (20) is V-shaped, and the two protrusions (40) of the first handle part (32) and the second handle part (42) are respectively embedded in the slot (20).

6. The telescopic shears according to claim 2, characterized in that, The cavity is also provided with a limiting groove (30); the first cutting edge (31) and the second cutting edge (41) are rotatably connected by a connector, which is embedded in the limiting groove (30).

7. The telescopic shears according to claim 6, characterized in that, The limiting groove (30) is n-shaped.

8. The telescopic shears according to claim 6, characterized in that, The connector is a center screw (6).

9. The telescopic shears according to claim 2, characterized in that, The first handle part (32) and the second handle part (42) are provided with locking pins (50) on the inner side of their tails, and the two ends of the compression spring (5) are respectively sleeved and fixed to the locking pins (50).

10. The telescopic shears according to any one of claims 2 to 9, characterized in that, The tail of the first outer shell (1) and / or the second outer shell (2) is provided with a hook (70); the outer sides of the first handle part (32) and the second handle part (42) are provided with anti-slip texture (60).

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