Scissors capable of automatically resetting

Abstract

The automatic reset scissors comprise a first blade assembly, a second blade assembly and a limiting mechanism, the limiting mechanism can limit the included angle between the first blade assembly and the second blade assembly to rotate within the range of a natural unfolding state and a complete folding state, the first blade assembly is provided with a first magnet and a third magnet, and the second blade assembly is provided with a second magnet. The second blade assembly is provided with a second magnet and a fourth magnet, and the first magnet and the second magnet as well as the third magnet and the fourth magnet are arranged in a homopolar opposite manner in a completely closed state so as to drive the first blade assembly and the second blade assembly to recover to a natural unfolding state; the special-shaped magnets are matched with the special-shaped counter bores, the magnets are fixed to the metal shear pieces by means of the adsorption capacity of the magnets, and the magnets are limited in the counter bores to fall off by means of partial overlapping of the shear pieces. The magnet can be fixed without additional structural features or processes such as welding and gluing, the structure is simple, and the cost is saved.

Description

Technical Field

[0001] This patent relates to the field of daily life, and particularly to a pair of scissors with automatic reset function. Background Art

[0002] Scissors usually consist of a rotor part, a stator part and a rivet. Among them, the rotor part is composed of a rotor blade ("rotating blade") and a rotor handle ("rotating handle"), and the stator part is composed of a stator blade ("fixed blade") and a stator handle ("fixed handle"). However, the existing scissors need to be lifted and opened with force by the thumb, which does not conform to ergonomics; or they are opened by a spring assembly, but the structure is complex, and the spring is also easy to pinch the hand or pop out, which is more harmful; moreover, the existing scissors can be opened at a large angle, and the blade will face outwards, which is easy to pinch the hand when picking up. Utility Model Content

[0003] In order to improve the convenience and safety of using scissors, this patent provides the following technical solutions:

[0004] Provide a first blade assembly, a second blade assembly and a limiting mechanism. The limiting mechanism can limit the included angle between the first blade assembly and the second blade assembly to rotate within the included angle range between the natural unfolded state and the fully closed state. The first blade assembly has a first magnet, and the second blade assembly has a second magnet. When in the fully closed state, the first magnet and the second magnet are arranged with the same poles facing each other to drive the first blade assembly and the second blade assembly to return to the natural unfolded state.

[0005] Further, the first magnet is arranged on the first blade assembly at a position closer to and / or farther from the first handle relative to the limiting mechanism; the second magnet is arranged on the second blade assembly at a position closer to and / or farther from the second handle relative to the limiting mechanism.

[0006] Further, the first blade assembly further includes a first magnetic attraction part, and the first magnetic attraction part includes a first magnetic attraction front end hole, a first magnetic attraction surrounding part, and a first magnetic attraction end hole; the second blade assembly further includes a second magnetic attraction part, and the second magnetic attraction part includes a second magnetic attraction front end hole, a second magnetic attraction surrounding part, and a second magnetic attraction end hole; the first magnetic attraction part and the second magnetic attraction part are arranged near the limiting mechanism.

[0007] Further, the first magnet includes a first magnet front end face, a first magnet front surrounding part, a first magnet rear surrounding part, and a first magnet rear end face; the second magnet includes a second magnet front end face, a second magnet front surrounding part, a second magnet rear surrounding part, and a second magnet rear end face.

[0008] Further, the first blade assembly further includes a first blade, a first cutting edge, a first extension, a first connection part, a first handle, a third magnet, and a third magnetic attraction part. The first magnet and the third magnet are arranged on both sides of the limiting mechanism; the second blade assembly further includes a second blade, a second cutting edge, a second extension, a second connection part, a second handle, a fourth magnet, and a fourth magnetic attraction part. The second magnet and the fourth magnet are arranged on both sides of the limiting mechanism.

[0009] Further, the limiting mechanism can limit the included angle between the first blade assembly and the second blade assembly to rotate within the included angle range between the fully unfolded state and the fully closed state. In the fully unfolded state, the included angle between the first blade assembly and the second blade assembly is the maximum rotation included angle β; in the fully closed state, the included angle between the first blade assembly and the second blade assembly is 0°; the maximum rotation included angle β is 30° - 45°, 45° - 60°, or 60° - 75°, specifically, it can be 30° - 35°, 35° - 40°, 40° - 45°, 45° - 50°, 55° - 60°, 60° - 65°, 65° - 70°, 70° - 75°.

[0010] Further, the limiting mechanism includes a special-shaped rivet, a special-shaped hole, and a fixing hole. The fixing hole is arranged on the first blade assembly, the special-shaped hole is arranged on the second blade assembly, the special-shaped rivet passes through the special-shaped hole and the fixing hole in sequence and is riveted to the fixing hole; the shape of the fixing hole is in a racetrack shape; the special-shaped hole rotates around the nail post.

[0011] Further, the special-shaped hole is a string shape with a certain inclination angle, that is, a hole with a concave middle and arc-shaped ends.

[0012] Further, the special-shaped hole includes a first stop part, a second stop part, a first guiding part, a third stop part, a fourth stop part, and a second guiding part. The first stop part, the second stop part, the third stop part, and the fourth stop part are line segments, and the first guiding part and the second guiding part are arcs.

[0013] Further, the special-shaped rivet includes a nail post and a nail head. The cross-section of the nail post is similar to the shape of the fixing hole; the special-shaped hole rotates around the nail post of the special-shaped rivet.

[0014] Further, the nail post includes a first side surface, a second side surface, a third side surface, and a fourth side surface. The second side surface and the fourth side surface are cylindrical surfaces, and the first side surface and the third side surface are flat surfaces.

[0015] This patent has the following beneficial effects:

[0016] 1. By providing driving force through magnets, it can avoid excessive fatigue of the thumb, is more ergonomic, and compared with the opening method by gravity moment, it can be used in any direction without being affected by the relationship between the scissors and the gravity direction.

[0017] 2. Provide a limiting mechanism to prevent the opening angle from being too large due to magnetic drive and avoid the blade from scratching the hand outward.

[0018] 3. By matching the special-shaped magnet with the special-shaped counterbore and using the adsorption ability of the magnet itself, the magnet is fixed on the metal cutting blade. And relying on the partial overlap of the cutting blades, the magnet is restricted in the counterbore and cannot fall off. No additional structural features or processes such as welding and gluing are required to fix the magnet, which has a simple structure and saves costs.

[0019] 4. This patent sets a limiting mechanism to prevent the opening angle from being too large due to magnetic drive and avoid the blade from scratching the hand outward; and magnets are arranged around the limiting mechanism. When fixed in the axial direction, the magnets with the same poles facing each other will generate a stable repulsive force, making the holding experience of the scissors stable and comfortable for users in both the fully unfolded state and the fully closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of this patent, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of this patent and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Exploded view of the assembly structure of the first embodiment;

[0022] Figure 2 Partial schematic diagram of the scissors in the fully closed state of the first embodiment;

[0023] Figure 3 Partial schematic diagram of the scissors in the natural unfolded state of the first embodiment;

[0024] Figure 4 Schematic diagram of the shape of the fixing hole of the first embodiment;

[0025] Figure 5 Stereoscopic schematic diagram of the special-shaped rivet of the first embodiment;

[0026] Figure 6 Schematic diagram of the cross-section of the column of the special-shaped rivet of the first embodiment;

[0027] Figure 7 Schematic diagram of the shape of the special-shaped hole of the first embodiment;

[0028] Figure 8 Assembly schematic diagram of the column of the special-shaped rivet and the special-shaped hole in the scissors in the fully closed state of the first embodiment;

[0029] Figure 9Assembly schematic diagram of the special-shaped rivet post and the special-shaped hole in the natural unfolded state of the scissors for the first embodiment;

[0030] Figure 10 Exploded view of the assembly structure for the second embodiment;

[0031] Figure 11 Partial assembly schematic diagram for the second embodiment;

[0032] Figure 12 Schematic diagram of the scissors in the natural unfolded state for the second embodiment;

[0033] Figure 13 Schematic diagram of the magnet position in the natural unfolded state of the scissors for the second embodiment;

[0034] Figure 14 Schematic diagram of the magnet position in the fully closed state of the scissors for the second embodiment;

[0035] Figure 15 Cross-sectional schematic diagram of the magnet position in the fully closed state of the scissors for the second embodiment;

[0036] Figure 16 Cross-sectional view of the first magnetic attraction part in the second embodiment;

[0037] Figure 17 Cross-sectional view of the first magnet in the second embodiment;

[0038] Figure 18 Schematic diagram of the scissors in the natural unfolded state for the third embodiment;

[0039] Figure 19 Schematic diagram of the scissors in the natural unfolded state for the fourth embodiment.

[0040] Among them, the reference numerals are explained as follows:

[0041] Scissors: 1, 2, 3, 4

[0042] First blade assembly: 11, 21, 31, 41

[0043] First blade: 111

[0044] First cutting edge: 112

[0045] First extension part: 115

[0046] First connecting part: 116

[0047] First handle: 117

[0048] Second blade assembly: 12, 22, 32, 42

[0049] Second blade: 121

[0050] Second cutting edge: 122

[0051] Second extension part: 125

[0052] Second connecting part: 126

[0053] Second handle: 127

[0054] Limit mechanism: 13

[0055] Special-shaped rivet: 131

[0056] First side: 1311

[0057] Second side: 1312

[0058] Third side: 1313

[0059] Fourth side: 1314

[0060] Special-shaped rivet column: 1318

[0061] Special-shaped rivet head: 1319

[0062] Special-shaped hole: 132

[0063] First stop part: 1321

[0064] Second stop part: 1322

[0065] First guiding part: 1323

[0066] Third stop part: 1324

[0067] Fourth stop part: 1325

[0068] Second guiding part: 1326

[0069] Fixing hole: 133

[0070] First magnetic attraction part: 213, 313, 413

[0071] First magnetic attraction front-end hole: 2131

[0072] First magnetic attraction enclosing part: 2132

[0073] First magnetic attraction end hole: 2133

[0074] First magnet: 214, 314, 414

[0075] First magnet front-end face: 2141

[0076] First magnet front enclosing part: 2142

[0077] First magnet rear enclosing part: 2143

[0078] Rear end face of the first magnet: 2144

[0079] Second magnetic attraction part: 223, 323, 423

[0080] Second magnet: 224, 324, 424

[0081] Front end face of the second magnet: 2241

[0082] Front enclosing part of the second magnet: 2242

[0083] Rear enclosing part of the second magnet: 2143

[0084] Rear end face of the second magnet: 2244

[0085] Third magnetic attraction part: 418

[0086] Third magnet: 419

[0087] Fourth magnetic attraction part: 428

[0088] Fourth magnet: 429 Specific embodiments

[0089] The detailed features and advantages of this patent are described in detail in the following specific embodiments. The content is sufficient for any person skilled in the art to understand the technical content of this patent and implement it accordingly. And according to the specification, claims and drawings disclosed in this specification, those skilled in the art can easily understand the related purposes and advantages of this patent.

[0090] To make the purpose, technical solution and advantages of this patent clearer, the following will further describe the embodiments of this patent in detail with reference to the drawings.

[0091] Embodiment 1

[0092] As Figure 1 shown, the scissors 1 shown in this embodiment includes a first blade assembly 11, a second blade assembly 12 and a limiting mechanism 13. The limiting mechanism 13 connects the first blade assembly 11 and the second blade assembly 12 and can limit the rotation angle between the first blade assembly 11 and the second blade assembly 12 in the natural unfolded state and the fully closed state within a preset range.

[0093] The first blade assembly 11 includes a first blade 111, a first cutting edge 112, a first extension portion 115, a first connecting portion 116, and a first handle 117. The first cutting edge 112 is located at the side end of the first blade 111. One side of the first cutting edge 112 facing the second blade 121 forms a cutting surface, and the surface of the first cutting edge 112 abutting against the second blade 121 is a flat surface. The first extension portion 115 and the first connecting portion 116 are located at the intersection of the first blade 111 and the first handle 117. The front end of the first blade 111 is the sharp and pointed first cutting edge 112, and the end is a long strip-shaped arc handle portion. In the middle of the front end inside the first handle 117, there is a card slot for accommodating the long strip-shaped arc handle portion at the end of the first blade 111. The first extension portion 115 is located at the outer end of the first blade 111, and the first connecting portion 116 is located at the inner end of the first blade 111. The first extension portion 115 can be sleeved with the first handle 117 made of non-metallic materials such as rubber and plastic. The first handle 117 has a finger ring for the little finger to the index finger to pass through and hold.

[0094] The second blade assembly 12 includes a second blade 121, a second cutting edge 122, a second extension portion 125, a second connecting portion 126, and a second handle 127. The second cutting edge 122 is located at the side end of the second blade 121. One side of the second cutting edge 122 facing the first blade 111 forms a cutting surface, and the surface of the second cutting edge 122 abutting against the first blade 111 is a flat surface. The second extension portion 125 and the second connecting portion 126 are located at the intersection of the second blade 121 and the second handle 127. The front end of the second blade 121 is the sharp and pointed second cutting edge 122, and the end is a long strip-shaped arc handle portion. In the middle of the front end inside the second handle 127, there is a card slot for accommodating the long strip-shaped arc handle portion at the end of the second blade 121, that is, the top of the second cutting edge 122 of the second blade 121 is inserted into the groove of the second handle 127 and fixed. The second extension portion 125 is located at the outer end of the second blade 121, and the second connecting portion 126 is located at the inner end of the second blade 121. The second extension portion 125 can be sleeved with a second handle 127 made of a different material. The second handle 127 is a streamline open handle designed according to ergonomics for the thumb or the root of the thumb to press and operate.

[0095] Such as Figure 2 And Figure 3As shown, when the scissors need to change from the natural unfolded state to the fully closed state, a force is applied to the second handle 127 of the scissors 1 in the direction of the first handle 117, causing the second handle 127 to move closer to the first handle 117. The distance between the first connecting portion 116 and the second connecting portion 126 decreases, that is, the opening angle β of the scissors 1 becomes smaller until the first blade portion 112 and the second blade portion 122 coincide and move downward during the movement. The surface of the first blade portion 112 abutting against the second blade 121 becomes flat, and the surface of the second blade portion 122 abutting against the first blade 111 becomes flat. The special-shaped hole 132 rotates around the special-shaped rivet 131 and approaches the first blade portion 112. At this time, the scissors 1 change from the natural unfolded state to the fully closed state. When the scissors need to change from the fully closed state to the natural unfolded state, after the force applied to the second handle 127 of the scissors 1 in the direction of the first handle 117 is withdrawn, rely on the gravity moment or apply a reverse force. At this time, the second handle 127 moves away from the first handle 117. The distance between the first connecting portion 116 and the second connecting portion 126 increases, that is, the opening angle of the scissors 1 becomes larger until the surface of the first blade portion 112 abutting against the second blade 121 becomes flat and the surface of the second blade portion 122 abutting against the first blade 111 becomes flat and moves to the first blade portion 112 and the second blade portion 122 coincide and move upward during the movement. The special-shaped hole 132 rotates around the special-shaped rivet 131 and moves away from the first blade portion 112. At this time, the scissors 1 are restored from the fully closed state to the natural unfolded state.

[0096] The limiting mechanism 13 includes a special-shaped rivet 131, a special-shaped hole 132, and a fixing hole 133.

[0097] As Figure 4 shown, the shape of the fixing hole 133 is a racetrack shape.

[0098] As Figure 5 and Figure 6 shown, the special-shaped rivet 131 includes a nail post 1318 and a nail head 1319. The nail post 1318 includes a first side surface 1311, a second side surface 1312, a third side surface 1313, and a fourth side surface 1314. From the cross-section of the nail post 1318, the first side surface 1311 and the third side surface 1313 are straight line segments, and the second side surface 1312 and the fourth side surface 1314 are arcs, so that the cross-section of the nail post 1318 is approximately racetrack-shaped. The fixing hole 133 is a rectangular columnar structure approximately elliptical that matches the special-shaped rivet 131 and coincides with the racetrack shape of the fixing hole 133 so that it can pass through the fixing hole 133.

[0099] In this embodiment, the special-shaped rivet 131 has a rectangular columnar structure, specifically including a special-shaped rivet head 1319 and a special-shaped rivet column 1318. The rivet column 1318 passes through the connecting special-shaped hole 132 and the fixing hole 133 in sequence and is deformed and riveted, so that the rivet head 1319 abuts against the outside of the second blade 121, and the end of the rivet column 1318 coincides with the outside of the first blade 111.

[0100] As Figure 7 shown, the special-shaped hole 132 is a string shape with a certain inclination angle, that is, a hole with a concave middle and arc-shaped ends. The special-shaped hole 132 includes a first stop portion 1321, a second stop portion 1322, a first guiding portion 1323, a third stop portion 1324, a fourth stop portion 1325 and a second guiding portion 1325. The first stop portion 1321, the second stop portion 1322, the third stop portion 1324 and the fourth stop portion 1325 are straight line segments for stopping the rotation of the rivet column 1318 to limit the rotation angle range. The first guiding portion 1323 and the second guiding portion 1325 are arcs for guiding the relative rotation of the rivet column 1318. The extension line of the straight line where the first stop portion 1321 and the fourth stop portion 1325 are located intersects at point O and has an included angle β. The relative rotation angle range of the rivet column 1318 and the rivet column 1318, that is, the relative rotation angle range of the first blade assembly 11 and the second blade assembly 12 is 0 to β, and the included angle β is preferably 30 to 75°, and more preferably 45 to 60°.

[0101] Specifically, as Figure 8 、 9 shown, the rivet column 1318 penetrates the special-shaped hole 132. When the scissors 1 are in the natural unfolded state or the fully closed state, the special-shaped hole 132 rotates around the rivet column 131 of the special-shaped rivet. Specifically, the central axes of the special-shaped hole 132, the rivet column 1318, and the fixing hole 133 completely coincide, and the center is represented by point P. After the rivet column 1318 penetrates the special-shaped hole 132, when the scissors 11 are in the natural unfolded state or the fully closed state, in fact, the special-shaped hole 132 and the rivet column 1318 rotate relative to each other. When the scissors 1 are in the fully closed state, the first stop portion 1321 abuts against the first side surface 1311, and the third stop portion 1324 abuts against the third side surface 1313, so as to be limited; when the scissors 1 are transformed from the fully closed state to the natural unfolded state, the special-shaped hole 132 rotates counterclockwise around the special-shaped rivet 131 with point P as the center. At this time, the first stop portion 1321 moves away from the first side surface 1311, and the fourth stop portion 1324 moves away from the third side surface 1313, and the relative rotation angle changes within the range of 0 to β; when the scissors 1 are in the natural unfolded state, the fourth stop portion 1325 abuts against the second side surface 1312, and the second stop portion 1322 abuts against the first side surface 1311, so as to be limited.

[0102] Embodiment 2

[0103] As Figures 10 - 14 shown, the scissors 2 shown in this embodiment include a first blade assembly 21, a second blade assembly 22 and a limiting mechanism. The limiting mechanism can limit the angle between the first blade assembly 21 and the second blade assembly 22 to rotate within the range of the natural unfolded state and the fully closed state. The first blade assembly 21 has a first magnet 214, and the second blade assembly 22 has a second magnet 224. When in the fully closed state, the first magnet 214 and the second magnet 224 are arranged with the same poles facing each other to drive the first blade assembly 21 and the second blade assembly 22 to return to the natural unfolded state. The distance d from the center point P of the special-shaped rivet to the center point of the magnet accounts for 0.2 of the length of the cutting edge of the scissors.

[0104] The first blade assembly 21 includes a first blade, a first cutting edge, a first magnetic attraction part 213, a first magnet 214, a first extension part, a first connection part and a first handle. The first cutting edge is located at the side end of the first blade. One side of the first cutting edge facing the second blade forms a cutting surface, and the surface of the first cutting edge abutting against the second blade is a flat surface; the first extension part and the first connection part are located at the intersection of the first blade and the first handle. The front end of the first blade is a sharp and pointed first cutting edge, and the end is a long strip arc-shaped handle part. In the middle of the front end inside the first handle, there is a card slot for accommodating the long strip arc-shaped handle part at the end of the first blade. The first extension part is located at the outer end of the first blade, and the first connection part is located at the inner end of the first blade. The first extension part can be sleeved with non-metallic materials such as rubber and plastic. The first handle has a finger ring for the fingers to pass through; the first magnetic attraction part 213 is arranged between the fixing hole and the first handle. The first handle has a finger ring for the little finger to the index finger to pass through and hold.

[0105] The second blade assembly 22 includes a second blade, a second cutting edge, a second magnetic attraction part 223, a second magnet 224, a second extension part, a second connection part and a second handle. The second cutting edge is located at the side end of the second blade. One side of the second cutting edge facing the first blade forms a cutting surface, and the surface of the second cutting edge abutting against the first blade is a flat surface; the second extension part and the second connection part are located at the intersection of the second blade and the second handle. The front end of the second blade is a sharp and pointed second cutting edge, and the end is a long strip arc-shaped handle part. In the middle of the front end inside the second handle, there is a card slot for accommodating the long strip arc-shaped handle part at the end of the second blade, that is, the top of the second cutting edge of the second blade is inserted into the groove of the second handle and fixed. The second extension part is located at the outer end of the second blade, and the second connection part is located at the inner end of the second blade. The second extension part can be sleeved with a second handle made of non-metallic materials such as rubber and plastic. The second handle is a streamline open handle designed according to ergonomics for the thumb or the root of the thumb to press and operate; the second magnetic attraction part 223 is arranged between the special-shaped hole and the second handle. In this embodiment, the limiting mechanism is the same as that in Embodiment 1.

[0106] As Figures 15 - 17As shown, the first magnetic attraction part 213 and the second magnetic attraction part 223 have the same structure and are respectively used to attract the first magnet 214 and the second magnet 224. The first magnetic attraction part 213 includes a first magnetic attraction front end hole 2131, a first magnetic attraction enclosing part 2132, and a first magnetic attraction end hole 2133. The cross-section of the first magnetic attraction part 213 is frustum-shaped. The first magnetic attraction enclosing part 2132 is a surface with a gradually decreasing diameter. The diameter of the first magnetic attraction front end hole 2131 is larger than that of the first magnetic attraction end hole 2133. The first magnetic attraction front end hole 2131 faces the second blade 121, and the first magnetic attraction end hole 2133 faces the outside. The first magnet 214 has an axisymmetric structure and includes a first magnet front end face 2141, a first magnet front enclosing part 2142, a first magnet rear enclosing part 2143, and a first magnet rear end face 2144. The first magnet front end face 2141 is larger than the first magnet rear end face 2144, and the first magnet front enclosing part 2142 is slightly larger than the first magnet rear enclosing part 2143, so that the first magnet rear end face 2144 and the first magnet rear enclosing part 2143 pass through the first magnetic attraction end hole 2133 and are fixed by the first magnetic attraction end hole 2133 at the intersection of the first magnet rear enclosing part 2143 and the first magnet front enclosing part 2142. At this time, the first magnetic attraction enclosing part 2132 is on the first magnet front enclosing part 2142 and the first magnetic attraction front end hole 2131 and the first magnet front end face 2141 are on the same horizontal plane.

[0107] The first magnet 214 and the second magnet 224 are of the same type. It is easy to understand that when the first magnet 214 approaches the second magnet 224, the two magnets will repel and move away from each other, thereby providing a driving force for the scissors to change to the natural unfolding state.

[0108] Apply a force to the second handle of the scissors 2 in the direction of the first handle, so that the second handle moves in the direction close to the first handle. The distance between the first connecting part and the second connecting part decreases, that is, the opening angle of the scissors 2 becomes smaller until the scissors 2 change from the natural unfolding state to the fully closed state.

[0109] If the force applied to the second handle of the scissors 2 in the direction of the first handle is withdrawn at this time, the two relatively arranged first magnets 214 and second magnets 224 have a repulsive force. Under the action of the repulsive force, the second handle moves in the direction away from the first handle, and the distance between the first connecting part and the second connecting part increases, that is, the opening angle of the scissors 2 becomes larger until the scissors 2 automatically return from the fully closed state to the natural unfolding state.

[0110] Embodiment 3

[0111] As Figure 18As shown, the scissors 3 include a first blade assembly 31, a second blade assembly 32, and a limiting mechanism. The first blade assembly 31 includes a first blade, a first cutting edge, a first magnetic attraction portion 313, a first magnet 314, a first extension portion, a first connection portion, and a first handle; the second blade assembly 32 includes a second blade, a second cutting edge, a second magnetic attraction portion 323, a second magnet 324, a second extension portion, a second connection portion, and a second handle.

[0112] The difference between this embodiment and Embodiment 2 is that the positions of the first magnetic attraction portion 313 and the first magnet 314 on the first blade assembly 31 are adjusted, and the first magnetic attraction portion 313 and the first magnet 314 are arranged in front of the fixing hole; and the positions of the second magnetic attraction portion 323 and the second magnet 324 on the second blade assembly 32 are adjusted, and the second magnetic attraction portion 323 and the second magnet 324 are arranged in front of the special-shaped hole. At this time, a larger setting space can provide a greater torque.

[0113] Embodiment 4

[0114] As Figure 19 As shown, the scissors 4 include a first blade assembly 41, a second blade assembly 42, and a limiting mechanism. The first blade assembly 41 includes a first blade, a first cutting edge, a first magnetic attraction portion 413, a first magnet 414, a first extension portion, a first connection portion, a first handle, a third magnetic attraction portion 418, and a third magnet 419; the second blade assembly 42 includes a second blade, a second cutting edge, a second magnetic attraction portion 423, a second magnet 424, a second extension portion, a second connection portion, a second handle, a fourth magnetic attraction portion 428, and a fourth magnet 429.

[0115] The difference between this embodiment and Embodiment 2 is that a third magnetic attraction portion 418, a third magnet 419, a fourth magnetic attraction portion 428, and a fourth magnet 429 are newly added. The first magnetic attraction portion 413 and the first magnet 414, the third magnetic attraction portion 418 and the third magnet 419 are arranged on both sides of the fixing hole of the first blade assembly 41, and the second magnetic attraction portion 423 and the second magnet 424, the fourth magnetic attraction portion 428 and the fourth magnet 429 are arranged on both sides of the special-shaped hole of the second blade assembly 42. Such an arrangement can provide a greater torque.

[0116] In the specification, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and components. However, these terms are used here only for the convenience of description and are determined based on the example orientations shown in the drawings. Since the disclosed embodiments can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0117] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, various possible combination methods will not be described separately.

[0118] In addition, any combination can also be made among various different embodiments as long as it does not violate the idea, and it should also be regarded as the disclosed content.

Claims

1. An automatically resetting scissors, characterized in that, It includes a first blade assembly, a second blade assembly and a limiting mechanism. The limiting mechanism can limit the included angle between the first blade assembly and the second blade assembly to rotate within the included angle range between the natural deployment state and the fully closed state. The first blade assembly has a first magnet, and the second blade assembly has a second magnet. When in the fully closed state, the first magnet and the second magnet are arranged with the same poles facing each other to drive the first blade assembly and the second blade assembly to return to the natural deployment state.

2. The scissors according to claim 1, characterized in that, The first magnet is arranged on the first blade assembly at a position closer to and / or farther from the first handle relative to the limiting mechanism; the second magnet is arranged on the second blade assembly at a position closer to and / or farther from the second handle relative to the limiting mechanism.

3. The scissors according to claim 1, characterized in that, The first blade assembly further includes a first magnetic attraction part, and the first magnetic attraction part includes a first magnetic attraction front hole, a first magnetic attraction enclosing part, and a first magnetic attraction end hole; The second blade assembly further includes a second magnetic attraction part, and the second magnetic attraction part includes a second magnetic attraction front hole, a second magnetic attraction enclosing part, and a second magnetic attraction end hole; The first magnetic attraction part and the second magnetic attraction part are arranged near the limiting mechanism.

4. The scissors according to claim 1, characterized in that, The first magnet includes a first magnet front end face, a first magnet front enclosing part, a first magnet rear enclosing part, and a first magnet rear end face; The second magnet includes a second magnet front end face, a second magnet front enclosing part, a second magnet rear enclosing part, and a second magnet rear end face.

5. The scissors according to claim 1, characterized in that, The first blade assembly further includes a first blade, a first cutting edge, a first extension part, a first connecting part, a first handle, a third magnet, and a third magnetic attraction part. The first magnet and the third magnet are arranged on both sides of the limiting mechanism; The second blade assembly further includes a second blade, a second cutting edge, a second extension part, a second connecting part, a second handle, a fourth magnet, and a fourth magnetic attraction part. The second magnet and the fourth magnet are arranged on both sides of the limiting mechanism.

6. The scissors according to claim 1, characterized in that, The limiting mechanism can limit the included angle between the first blade assembly and the second blade assembly to rotate within the included angle range between the fully deployed state and the fully closed state. In the fully deployed state, the included angle between the first blade assembly and the second blade assembly is the maximum rotation angle β; in the fully closed state, the included angle between the first blade assembly and the second blade assembly is 0°; The maximum rotation angle β is 30° - 45°, 45° - 60°, or 60° - 75°.

7. The scissors according to claim 1, characterized in that, The limiting mechanism includes a special-shaped rivet, a special-shaped hole, and a fixing hole. The fixing hole is arranged on the first blade assembly, the special-shaped hole is arranged on the second blade assembly, and the special-shaped rivet sequentially passes through the special-shaped hole and the fixing hole and is riveted to the fixing hole; The shape of the fixing hole is in the shape of a runway; The special-shaped hole is in the shape of a string with a certain inclination angle, that is, a hole with a concave middle and arc-shaped ends.

8. The scissors according to claim 7, characterized in that, The special-shaped hole includes a first stop part, a second stop part, a first guiding part, a third stop part, a fourth stop part, and a second guiding part. The first stop part, the second stop part, the third stop part, and the fourth stop part are line segments, and the first guiding part and the second guiding part are arcs.

9. The scissors according to claim 7, characterized in that, The special-shaped rivet includes a nail post and a nail head, and the cross-section of the nail post is similar to the shape of the fixing hole; The special-shaped hole rotates around the nail post of the special-shaped rivet.

10. The scissors according to claim 9, characterized in that, The nail post includes a first side surface, a second side surface, a third side surface, and a fourth side surface. The second side surface and the fourth side surface are cylindrical surfaces, and the first side surface and the third side surface are flat surfaces.

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