Elastically switchable opening scissors

Abstract

To provide elastically changeable unpacking scissors.SOLUTION: The elastically changeable unpacking scissors comprise: a screw; an elastically changing member; a first shearing blade; and a second shearing blade. The first shearing blade is provided with a movement hole for moving the screw. The screw penetrates the movement hole to enable the first shearing blade to pivotally move with respect to the second shearing blade about the screw. The elastically changing member includes an elastic part. A storage groove communicated with the movement hole is provided in the surface of the first shearing blade facing the second shearing blade. The elastically changing member is positioned in the storage groove and held between the first and second shearing blades. The elastic part of the elastically changing member extends in a projection region and retreats to be operable, thereby blocking or permitting movement of the screw in the movement hole. Thus, the first shearing blade is changed between a projecting position and a retreating position to be operable with respect to the second shearing blade. The elastically changeable unpacking scissors exhibits advantages of a simple structure, easy assembling, and low production cost.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of scissors, and in particular to elastically switchable unpacking scissors. [Background technology]

[0002] Scissors are a commonly used tool in everyday life, primarily used to cut flat or wire-shaped objects such as cloth, paper, steel plates, ropes, and round steel bars. They are double-edged tools with two blades arranged crosswise and can be opened and closed.

[0003] When packaging an object in a packaging box, the sealed portion of the box is usually sealed with clear or packaging tape. When opening the box, the clear or packaging tape is cut with a knife or scissors to open the box. Current scissors can be used to cut the clear or packaging tape at the sealed portion of the box, but this requires the scissors' two shear blades to be opened relatively apart and the cutting edge of one of the shear blades to be used. This is less convenient than cutting with a knife. Furthermore, because only the cutting edge of one shear blade is used for cutting and the cutting edge of the other shear blade is exposed, there are certain safety hazards during operation, and incorrect operation can easily injure the hands.

[0004] Currently, there are scissors specifically designed for unpacking. See Chinese Patent CN215589229U, which discloses unpacking scissors, including a first shearing blade, a second shearing blade, a screw, and a moving hole, the moving hole being formed by injection molding with a rubber member having a slide channel and a pivot hole. Injection molding into a single unit reduces assembly time and significantly increases production costs. Furthermore, when the first shearing blade and the rubber member are molded into a single unit, wear occurs as the screw moves through the slide channel and the pivot hole. Therefore, replacing the screw often requires replacing the shearing blade at the same time, which reduces the product's competitiveness and makes it difficult to meet market demands.

[0005] To address the above-mentioned challenges, there is a need to provide resiliently switchable opening scissors. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION It is an object of the present invention to provide a resiliently switchable unpacking scissors that is simple in structure, easy to assemble, and inexpensive to produce. [Means for solving the problem]

[0007] In order to achieve the above object, the elastically switchable unpacking scissors according to the present invention comprise: a screw, an elastic switching member, and first and second shear blades that can be severed from each other, wherein a first handle portion is connected to an end of the first shear blade and a second handle portion is connected to an end of the second shear blade; the first shear blade has a movement hole through which the screw moves; the screw passes through the movement hole and is fixedly connected to the second shear blade so that the first shear blade can pivot around the second shear blade relative to the screw; movement of the screw within the movement hole causes the first shear blade to move back and forth relative to the second shear blade; and the first shear blade moves relative to the second shear blade and has a protruding position and a retracted position; The elastic switching member has an elastic portion, and a surface of the first shear blade facing the second shear blade is provided with an accommodating groove communicating with the moving hole, the elastic switching member is fixed in the accommodating groove and is sandwiched between the first shear blade and the second shear blade, and the elastic portion of the elastic switching member extends within a projection area of ​​the moving hole and is operably retracted to prevent or allow the screw to move within the moving hole, thereby operably switching the first shear blade between the protruding position and the retracted position relative to the second shear blade.

[0008] Preferably, two elastic portions are provided, the two elastic portions are provided symmetrically in the moving direction of the first shear blade, and the distance between the two elastic portions is less than the diameter of the screw.

[0009] Preferably, the elastic switching member includes a switching body, the switching body is provided with a through hole, the screw further passes through the through hole, and the elastic portion extends from the switching body toward the through hole.

[0010] Specifically, the through hole includes a first circular arc, a first long side, a second circular arc, and a second long side, and the first circular arc, first long side, second circular arc, and second long side are arranged in order and surround the through hole together, and the elastic portion is provided between the first long side and the second circular arc and / or between the second circular arc and the second long side.

[0011] Specifically, the first arc, the elastic portion, and the second arc together surround a switching channel through which the screw switches, and when the screw moves in the first arc, the first shear blade is in the retracted position, and when the screw moves in the second arc, the first shear blade is in the extended position.

[0012] Specifically, an elastic gap through which the elastic portion elastically deforms is formed between the opposite side of the elastic portion from the switching channel and the through-hole.

[0013] Specifically, the screw includes a gap and a connecting rod that are connected to each other, the connecting rod moves within the moving hole, the connecting rod is a cylindrical body, and both the diameter of the first arc and the diameter of the second arc are equal to the diameter of the connecting rod.

[0014] Specifically, the first arc and the second arc are arranged symmetrically, the first long side and the second long side are arranged symmetrically and are parallel to each other, and the center of the first arc and the center of the second arc are on the axis of symmetry between the first long side and the second long side.

[0015] Preferably, the resilient transition member is a plate-like structure.

[0016] Preferably, the outer contour of the receiving groove matches the outer contour of the resilient transition member, and the resilient transition member is flush with the surface of the first shear blade.

[0017] Preferably, the moving hole includes a third arc, a third long side, a fourth arc, and a fourth long side, and the third arc, the third long side, the fourth arc, and the fourth long side are arranged in order and together surround the moving hole.

[0018] Specifically, the screw includes a gap and a connecting pillar that are connected to each other, the connecting pillar moves within the moving hole, the connecting pillar is a cylindrical body, and the distance between the third long side and the fourth long side, the diameter of the third arc, and the diameter of the fourth arc are all equal to the diameter of the connecting pillar.

[0019] Specifically, the third arc and the fourth arc are arranged symmetrically, the third long side and the fourth long side are arranged symmetrically and parallel to each other, and the centers of the third arc and the fourth arc are on the axis of symmetry between the third long side and the fourth long side.

[0020] Preferably, the screw includes a gap and a connecting rod that are connected to each other, the connecting rod moves within the moving hole, the gap is outside the first shear blade, and a protective ring is fitted outside the gap.

[0021] Preferably, the first handle has a first cushioning protrusion on the inside thereof, and the second handle has a second cushioning protrusion on the inside thereof, the first cushioning protrusion corresponding to the second cushioning protrusion. [Effects of the Invention]

[0022] Compared with the prior art, the elastically switchable unpacking scissors of the present invention has an elastic switching member between the first shear blade and the second shear blade, and as the screw moves within the moving hole, the first shear blade moves back and forth relative to the second shear blade, and the first shear blade moves relative to the second shear blade, and has a protruding position and a retracted position, and when the first shear blade is in the retracted position, the cutting edge of the second shear blade exceeds the cutting edge of the first shear blade, that is, the cutting edges of the first shear blade and the second shear blade are not aligned, and the second shear blade protrudes relative to the first shear blade, allowing the first shear blade and the second shear blade to move relatively with their positions shifted. Therefore, in this position, when the first and second shearing blades are fully closed, the cutting edge of the second shearing blade is exposed, allowing it to cut transparent tape or packaging tape, thereby achieving its opening function. When the first shearing blade is in the extended position, the cutting edge of the second shearing blade is flush with the cutting edge of the first shearing blade. A receiving groove communicating with the moving hole is provided on the surface of the first shearing blade facing the second shearing blade. The elastic switching member is fixed in the receiving groove and sandwiched between the first and second shearing blades. The receiving groove provides an attachment space for the elastic switching member so that the elastic switching member is stably sandwiched between the first and second shearing blades. The elastic portion of the elastic switching member extends within the projected area of ​​the moving hole and is operably retracted to prevent or allow movement of the screw within the moving hole, thereby operably switching the first shearing blade between the extended position and the retracted position relative to the second shearing blade. It can be seen that the first shear blade is freely movable forward and backward relative to the second shear blade and is not locked in the extended or retracted position relative to the second shear blade solely by the action of the movable hole. The elastically acting portion of the elastic member, which extends within the projected area of ​​the movable hole, cooperates with the movable hole to constantly receive resistance from the elastic member when the first shear blade is switched between the extended and retracted positions relative to the second shear blade. Therefore, manual pressure must be provided to overcome the resistance from the elastic member so that the elastic member of the elastic switching member retracts upon operation to prevent or allow movement of the screw within the movable hole, thereby operably switching the first shear blade between the extended and retracted positions relative to the second shear blade.When manual pressure is removed, the first shear blade self-locks into the extended or retracted position relative to the second shear blade. This simple structure allows for flexible switching and eliminates the need for an additional locking mechanism. The separate elastic switching member, first shear blade, and second shear blade facilitate assembly. Furthermore, replacing the elastic switching member does not require replacing the first shear blade, which meets production needs. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of the three-dimensional structure of the elastically switchable unpacking scissors of the present invention when the first shear blade is in the extended position. FIG. [Figure 2] FIG. 2 is a front view of the resiliently switchable unpacking scissors of FIG. 1. [Figure 3] 1 is a schematic diagram of the three-dimensional structure of the elastically switchable unpacking scissors of the present invention in an open state. FIG. [Figure 4] FIG. 4 is a front view of the resiliently switchable unpacking scissors of FIG. 3. [Figure 5] 1 is a schematic diagram of the three-dimensional structure of the resiliently switchable unpacking scissors of the present invention when the first shear blade is in the retracted position. FIG. [Figure 6] FIG. 6 is a front view of the resiliently switchable unpacking scissors of FIG. 5. [Figure 7] FIG. 1 is an exploded view of the resiliently switchable unpacking scissors of the present invention. [Figure 8] 1 is a schematic diagram of the three-dimensional structure of the elasticity transition member of the elastically switchable unpacking scissors of the present invention. FIG. [Figure 9] 3 is a structural schematic diagram of the elastically switchable unpacking scissors of FIG. 2 with a hidden gap. [Figure 10] FIG. 10 is a partially enlarged view of part A in FIG. 9. [Figure 11] 3 is a schematic diagram of the internal structure of the elastically switchable unpacking scissors of FIG. 2. FIG. [Figure 12]10A-10C illustrate an intermediate transition state in which the first shear blade of the resiliently switchable unpacking scissors of the present invention moves from an extended position to a retracted position relative to the second shear blade. [Figure 13] 7 is a schematic diagram of the internal structure of the elastically switchable unpacking scissors of FIG. 6. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain the technical contents, structural features, and obtained effects of the present invention in detail, the following detailed description will be given with reference to the embodiments and accompanying drawings.

[0025] As shown in FIGS. 1 to 13, the present invention provides elastically switchable unpacking scissors 100, which includes an elastic switching member 4, a screw 1, a first shearing blade 2, and a second shearing blade 3, wherein the first shearing blade 2 and the second shearing blade 3 are capable of cutting each other. A first handle 21 is connected to an end of the first shearing blade 2, and a second handle 31 is connected to an end of the second shearing blade 3. The first shearing blade 2 has a movement hole 22 through which the screw 1 moves. The movement hole 22 is an elongated hole, and the screw 1 passes through the movement hole 22 and is fixedly connected to the second shearing blade 3 so that the first shearing blade 2 can pivot relative to the second shearing blade 3 around the screw 1. The first shearing blade 2 and the second shearing blade 3 achieve cutting each other by pivoting. As the screw 1 moves within the moving hole 22, the first shearing blade 2 can move back and forth relative to the second shearing blade 3. The first shearing blade 2 has a protruding position and a retracted position relative to the second shearing blade 3 (see FIGS. 1 and 2 for the protruding position and FIGS. 5 and 6 for the retracted position). When the first shearing blade 2 is in the retracted position, the cutting edge of the second shearing blade 3 extends beyond the cutting edge of the first shearing blade 2, i.e., the cutting edges of the first shearing blade 2 and the second shearing blade 3 are not aligned, and the second shearing blade 3 protrudes relative to the first shearing blade 2, causing the first shearing blade 2 and the second shearing blade 3 to move relative to each other with a shifted position (see FIG. 13). Therefore, in this position, when the first shearing blade 2 and the second shearing blade 3 are fully closed, the cutting edge of the second shearing blade 3 is exposed, allowing the cutting edge of the second shearing blade 3 to cut transparent tape or packaging tape, thereby achieving a packaging opening function. When the first shearing blade 2 is in the extended position, the cutting edge of the second shearing blade 3 is aligned with the cutting edge of the first shearing blade 2 (see FIG. 11 ). The elastic transition member 4 has an elastic portion 42, and a receiving groove 23 communicating with the movement hole 22 is provided on the surface of the first shearing blade 2 facing the second shearing blade 3. The elastic transition member 4 is fixed within the receiving groove 23 and is sandwiched between the first shearing blade 2 and the second shearing blade 3. The receiving groove 23 provides an attachment space for the elastic transition member 4 so that the elastic transition member 4 is stably sandwiched between the first shearing blade 2 and the second shearing blade 3.The elastic switching member 4 is fixed in the receiving groove 23 and is sandwiched between the first shearing blade 2 and the second shearing blade 3. The elastic portion 42 of the elastic switching member 4 extends within the projection area of ​​the movable hole 22 and is operably retracted to prevent or allow movement of the screw 1 within the movable hole 22, thereby operably switching the first shearing blade 2 between a protruding position and a retracted position relative to the second shearing blade 3 (see FIGS. 11 to 13 for details). By the action of the movable hole 22 alone, the first shearing blade 2 freely moves forward and backward relative to the second shearing blade 3 and is not locked in the protruding position or the retracted position relative to the second shearing blade 3. However, the elastic acting portion 42a of the elastic portion 42, which extends within the projection area of ​​the movable hole 22, cooperates with the movable hole 22, so that the first shearing blade 2 is always subjected to a resistance force by the elastic portion 42 when it is switched between the protruding position and the retracted position relative to the second shearing blade 3 (see FIG. 12 for the switching state). Therefore, manual pressure must be applied to overcome the resistance of the elastic portion 42 so that the elastic portion 42 of the elastic switching member 4 retracts upon operation, preventing or allowing the screw 1 to move within the moving hole 22, thereby operably switching the first shear blade 2 between the extended position and the retracted position relative to the second shear blade 3. When the manual pressure is removed, the first shear blade 2 self-locks in the extended or retracted position relative to the second shear blade 3. This simple structure allows for flexible switching and does not require an additional locking mechanism. It can be seen that when the first shear blade 2 is in the extended or retracted position, the first shear blade 2 can pivot relative to the second shear blade 3 and cut. Because the elastic switching member 4, the first shear blade 2, and the second shear blade 3 are provided separately, assembly is not only easy, but also the first shear blade 2 does not need to be replaced when the elastic switching member 4 needs to be replaced, thereby meeting production needs. More specifically, the following is described.

[0026] 8 , the elastic transition member 4 includes a transition body 43, a through-hole 41 is provided in the transition body 43, a screw 1 further passes through the through-hole 41, the screw 1 passes through the first shear blade 2, the elastic transition member 4 and the second shear blade 3 are finally riveted to the second shear blade 3, the screw 1 is fixed to the second shear blade 3, and the elastic portion 42 extends from the transition body 43 toward the through-hole 41. Specifically, the through-hole 41 includes a first circular arc 411, a first long side 412, a second circular arc 413, and a second long side 414, which are arranged in order and surround the through-hole 41 together.

[0027] 6 to 8 , when two elastic portions 42 are provided, the two elastic portions 42 are provided symmetrically in the moving direction of the first shearing blade 2, the distance between the two elastic portions 42 is less than the diameter of the screw 1, the screw 1 includes a gap 11 and a connecting column 12 connected to each other, and the elastic portion 42 stops the connecting column 12 of the screw 1. The elastic portion 42 is provided between the first long side 412 and the second arc 413, and between the second arc 413 and the second long side 414. In other embodiments, when one elastic portion 42 is provided, the elastic portion 42 is provided between the first long side 412 and the second arc 413, or between the second arc 413 and the second long side 414. That is, even when the elastic portion 42 is provided on one side, it also serves as a stopper, and therefore may be adaptively adjusted as needed depending on the marker.

[0028] 8 to 13, the first circular arc 411, the elastic portion 42, and the second circular arc 413 together surround the switching channel 44 through which the screw 1 switches. When the screw 1 moves to the first circular arc 411, the first shearing blade 2 is in the retracted position (see FIG. 13), and when the screw 1 moves to the second circular arc 413, the first shearing blade 2 is in the protruding position (see FIG. 11). Specifically, an elastic gap 45 through which the elastic portion 42 elastically deforms is formed between the opposite side of the switching channel 44 of the elastic portion 42 and the through-hole 41. That is, due to the deformation of the elastic portion 42, an elastic gap 45 is formed between the elastic portion 42 and the first long side 412 and between the elastic portion 42 and the second long side 414.

[0029] 8, the connecting rod 12 moves through the through hole 41 and the moving hole 22. The connecting rod 12 is a cylindrical body, and the diameters of the first circular arc 411 and the second circular arc 413 are equal to the diameter of the connecting rod 12, so that the connecting rod can stably self-lock on the first circular arc 411 or the second circular arc 413 without affecting the shearing operation of the scissors. Preferably, the first circular arc 411 and the second circular arc 413 are arranged symmetrically, and the first long side 412 and the second long side 414 are arranged symmetrically and parallel to each other, with the center of the first circular arc 411 and the center of the second circular arc 413 on the symmetric axis of the first long side 412 and the second long side 414, so that switching between positions can be performed more smoothly.

[0030] As shown in Figures 7 and 8, the elastic transition member 4 has a plate-like structure, the outer contour of the accommodation groove 23 matches the outer contour of the elastic transition member 4, and the upper end surface of the elastic transition member 4 is flush with the surface of the first shearing blade 2. Therefore, the elastic transition member 4 does not affect the shearing action of the first shearing blade 2 and the second shearing blade 3 as they pivot relative to each other.

[0031] 10 , the moving hole 22 includes a third circular arc 221, a third long side 222, a fourth circular arc 223, and a fourth long side 224, which are arranged in order and surround the moving hole 22. Specifically, the distance between the third long side 222 and the fourth long side 224, the diameter of the third circular arc 221, and the diameter of the fourth circular arc 223 are equal to the diameter of the connecting rod 12, so that the connecting rod 12 can move back and forth and rotate within the moving hole 22. Preferably, the third arc 221 and the fourth arc 223 are arranged symmetrically, the third long side 222 and the fourth long side 224 are arranged symmetrically and parallel to each other, and the center of the third arc 221 and the center of the fourth arc 223 are on the axis of symmetry between the third long side 222 and the fourth long side 224, but are not limited to this.

[0032] As shown in Figures 6 and 7, the screw 1 includes a gap 11 and a connecting rod 12 that are connected to each other, and the connecting rod 12 moves within the through hole 41 and the moving hole 22. The gap 11 is located outside the first shearing blade 2, and a protective ring 13 is fitted outside the gap 11, thereby reducing wear on the gap 11 and improving usability.

[0033] As shown in FIG. 4, the first handle 21 has a first buffer protrusion 6 on the inside thereof, and the second handle 31 has a second buffer protrusion 5 on the inside thereof, and the first buffer protrusion and the second buffer protrusion correspond to each other, thereby improving comfort during use.

[0034] As described above, the operating process of the elastically switchable unpacking scissors 100 of the present invention is described in detail as shown in FIGS.

[0035] The first shearing blade 2 and the second shearing blade 3 are manually pushed against each other to overcome the resistance of the elastic portion 42, thereby switching the first shearing blade 2 to a retracted position relative to the second shearing blade 3. When the first shearing blade 2 is in the retracted position, the cutting edge of the second shearing blade 3 extends beyond the cutting edge of the first shearing blade 2, i.e., the cutting edges of the first shearing blade 2 and the second shearing blade 3 are not aligned, and the second shearing blade 3 protrudes relative to the first shearing blade 2, allowing the first shearing blade 2 and the second shearing blade 3 to move relative to each other (see FIG. 13 ). Therefore, in this position, when the first shearing blade 2 and the second shearing blade 3 are fully closed, the cutting edge of the second shearing blade 3 is exposed, allowing the cutting edge of the second shearing blade 3 to cut transparent tape or packaging tape, thereby achieving the function of opening a package. The first shearing blade 2 and the second shearing blade 3 are pressed by hand to overcome the resistance force of the elastic portion 42, and the first shearing blade 2 is switched to the protruding position relative to the second shearing blade 3. When the first shearing blade 2 is in the protruding position, the cutting edge of the second shearing blade 3 and the cutting edge of the first shearing blade 2 are flush with each other (see FIG. 11). When the pressure is stopped, the first shearing blade 2 is self-locked in the protruding position or the retracted position relative to the second shearing blade 3.

[0036] An elastic switching member 4 is provided between the first shearing blade 2 and the second shearing blade 3. As the screw 1 moves within the moving hole 22, the first shearing blade 2 moves back and forth relative to the second shearing blade 3. The first shearing blade 2 moves relative to the second shearing blade 3 and has a protruding position and a retracted position. When the first shearing blade 2 is in the retracted position, the cutting edge of the second shearing blade 3 extends beyond the cutting edge of the first shearing blade 2, i.e., the cutting edges of the first shearing blade 2 and the second shearing blade 3 are not aligned, and the second shearing blade 3 protrudes relative to the first shearing blade 2, allowing the first shearing blade 2 and the second shearing blade 3 to move relative to each other with their positions shifted. Therefore, in this position, when the first shearing blade 2 and the second shearing blade 3 are fully closed, the cutting edge of the second shearing blade 3 is exposed, allowing the cutting edge of the second shearing blade 3 to cut transparent tape or packaging tape, thereby fulfilling the function of opening packages. When the first shear blade 2 is in the extended position, the cutting edge of the second shear blade 3 is flush with the cutting edge of the first shear blade 2. A receiving groove 23 communicating with the moving hole is provided on the surface of the first shear blade 2 facing the second shear blade 3. The elastic switching member 4 is fixed in the receiving groove 23 and sandwiched between the first shear blade 2 and the second shear blade 3. The receiving groove 23 provides an attachment space for the elastic switching member 4 so that the elastic switching member 4 is stably sandwiched between the first shear blade 2 and the second shear blade 3. The elastic switching member 4 is fixed in the receiving groove 23 and sandwiched between the first shear blade 2 and the second shear blade 3. The elastic portion 42 of the elastic switching member 4 extends within the projected area of ​​the moving hole 22 and is operably retracted to prevent or allow movement of the screw 1 within the moving hole 22, thereby operably switching the first shear blade 2 relative to the second shear blade 3 between the extended position and the retracted position. It can be understood that the first shearing blade 2 moves freely in the forward and backward directions relative to the second shearing blade 3, and is not locked in the extended position or the retracted position relative to the second shearing blade 3, solely by the action of the movable hole 22. The elastic acting portion of the elastic portion 42 that extends into the projected area of ​​the movable hole 22 cooperates with the movable hole 22, so that the first shearing blade 2 is always subjected to a resistance force from the elastic portion 42 when it moves and is switched between the extended position and the retracted position relative to the second shearing blade 3.Therefore, manual pressure must be provided to overcome the resistance of the elastic portion 42 so that the elastic portion of the elastic switching member retracts and prevents or allows movement of the screw within the movement hole 22, thereby operably switching the first shear blade 2 between the extended position and the retracted position relative to the second shear blade 3. When the manual pressure is removed, the first shear blade 2 self-locks in the extended or retracted position relative to the second shear blade 3. This provides a simple structure, flexible switching, and no additional locking mechanism is required. The separate provision of the elastic switching member 4, first shear blade 2, and second shear blade 3 not only facilitates assembly, but also eliminates the need to simultaneously replace the first shear blade 2 when the elastic switching member 4 needs to be replaced, thereby meeting production needs.

[0037] The above disclosure is merely a preferred example of the present invention, and of course, this does not limit the scope of the present invention, and equivalent modifications made based on the scope of the patent application of the present invention still belong to the scope of the present invention.

Claims

1. A packing shears comprising a screw and a first shear blade and a second shear blade capable of cutting each other, wherein a first handle is connected to the end of the first shear blade and a second handle is connected to the end of the second shear blade, the first shear blade is provided with a movable hole for the screw to move, the screw is fixedly connected to the second shear blade by passing through the movable hole so that the first shear blade can pivot relative to the second shear blade about the screw, the first shear blade is movable in the front-rear direction relative to the second shear blade by the movement of the screw within the movable hole, and the first shear blade is elastically switchable between a protruding position and a retracted position relative to the second shear blade, The present invention further includes an elastic switching member, the elastic switching member having an elastic portion, the surface of the first shear blade facing the second shear blade having a housing groove communicating with the movable hole, the elastic switching member being fixed in the housing groove and sandwiched between the first shear blade and the second shear blade, the elastic portion of the elastic switching member extending into the projected area of ​​the movable hole and being operable to retract to prevent or allow the movement of the screw within the movable hole, thereby allowing the first shear blade to be operable to switch between the protruding position and the retracted position relative to the second shear blade, The elastic switching member includes a switching body, the switching body is provided with a through hole, the screw further passes through the through hole, and the elastic portion extends from the switching body toward the through hole.

2. A packing shears comprising a screw and a first shear blade and a second shear blade capable of cutting each other, wherein a first handle is connected to the end of the first shear blade and a second handle is connected to the end of the second shear blade, the first shear blade is provided with a movable hole for the screw to move, the screw is fixedly connected to the second shear blade by passing through the movable hole so that the first shear blade can pivot relative to the second shear blade about the screw, the first shear blade is movable in the front-rear direction relative to the second shear blade by the movement of the screw within the movable hole, and the first shear blade is elastically switchable between a protruding position and a retracted position relative to the second shear blade, The present invention further includes an elastic switching member, the elastic switching member having an elastic portion, the surface of the first shear blade facing the second shear blade having a housing groove communicating with the movable hole, the elastic switching member being fixed in the housing groove and sandwiched between the first shear blade and the second shear blade, the elastic portion of the elastic switching member extending into the projected area of ​​the movable hole and being operable to retract to prevent or allow the movement of the screw within the movable hole, thereby allowing the first shear blade to be operable to switch between the protruding position and the retracted position relative to the second shear blade, An elastically switchable unpacking scissors characterized in that two elastic parts are provided, the two elastic parts are provided symmetrically with respect to the direction of movement of the first shearing blade, and the distance between the two elastic parts is less than the diameter of the screw.

3. The elastically switchable unpacking scissors according to claim 1, characterized in that the through hole includes a first arc, a first long side, a second arc, and a second long side, the first arc, the first long side, the second arc, and the second long side are provided in order and together surround the through hole, and the elastic part is provided between the first long side and the second arc and / or between the second arc and the second long side.

4. The elastically switchable unpacking scissors according to claim 3, characterized in that the first arc, the elastic portion, and the second arc together surround a switching channel through which the screw is switched, and when the screw moves to the first arc, the first shearing blade is in the retracted position, and when the screw moves to the second arc, the first shearing blade is in the protruding position.

5. The elastically switchable unpacking scissors according to claim 4, characterized in that an elastic gap is formed between the opposite side of the switching channel of the elastic part and the through hole, allowing the elastic part to deform elastically.

6. The elastically switchable unpacking scissors according to claim 3, characterized in that the screw includes a cap and a connecting column that are connected to each other, the connecting column moves within the movable hole, the connecting column is cylindrical, and both the diameter of the first arc and the diameter of the second arc are equal to the diameter of the connecting column.

7. 4. The resiliently switchable unpacking scissors of claim 3, wherein the first arc and the second arc are symmetrically arranged, the first long side and the second long side are symmetrically arranged and parallel to each other, and the centers of the first arc and the second arc are on an axis of symmetry between the first long side and the second long side.

8. 3. The resiliently switchable unpacking scissors of claim 1 or 2, wherein the resiliently switchable member is a plate-like structure.

9. 3. The resiliently switchable unpacking scissors of claim 1 or 2, wherein the outer contour of the receiving groove matches the outer contour of the resilient transition member, and the resilient transition member is flush with the surface of the first shear blade.

10. 3. The resiliently switchable unpacking scissors of claim 1 or 2, wherein the travel hole includes a third arc, a third long side, a fourth arc, and a fourth long side, the third arc, the third long side, the fourth arc, and the fourth long side being arranged in order and together surrounding the travel hole.

11. 11. The elastically switchable unpacking scissors according to claim 10, wherein the screw includes a cap and a connecting rod that are connected to each other, the connecting rod moves within the moving hole, the connecting rod is a cylindrical body, and the distance between the third long side and the fourth long side, the diameter of the third arc, and the diameter of the fourth arc are all equal to the diameter of the connecting rod.

12. The resiliently switchable unpacking scissors according to claim 10, characterized in that the third arc and the fourth arc are arranged symmetrically, the third long side and the fourth long side are arranged symmetrically and parallel to each other, and the centers of the third arc and the fourth arc are on an axis of symmetry between the third long side and the fourth long side.

13. The resiliently switchable unpacking scissors according to claim 1 or 2, characterized in that the screw includes a cap and a connecting post connected to each other, the connecting post moves within the moving hole, the cap is outside the first shear blade, and a protective ring is fitted outside the cap.

14. 3. The resiliently switchable unpacking scissors of claim 1 or 2, wherein the first handle has a first shock-absorbing protrusion on the inside thereof and the second handle has a second shock-absorbing protrusion on the inside thereof, the first shock-absorbing protrusion corresponding to the second shock-absorbing protrusion.

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