A scissors

Abstract

The present application belongs to the technical field of scissors, and particularly relates to a scissors with functions of both scissors and art knife. The scissors comprises a first blade body and a second blade body connected by a pin shaft, a first cutting part is arranged on the upper end face of the first blade body opposite to the second blade body, a guard plate is fixedly connected to the inner side of the second blade body along the length direction of the second blade body, a blade holder is slidably connected to the end face of the second blade body and the guard plate along the length direction of the second blade body, a blade is connected to the blade holder below the lower end face of the guard plate, a push plate is arranged on the upper end face of the blade holder and extends above the upper end face of the second blade body, and a blade outlet is arranged at the front end of the second blade body and the guard plate. When the push plate is pushed towards the front end of the second blade body, the blade can be pushed out from the blade outlet. The present application has the functions of both scissors and art knife, and the first cutting part of the scissors can be used as the cutting part of the scissors mode and the cutting part of the art knife mode.

Description

Technical Field

[0001] This invention belongs to the field of scissors technology, and in particular relates to a pair of scissors that combines the functions of scissors and utility knives. Background Technology

[0002] Scissors or utility knives are necessities for daily life and office work, but traditional scissors or utility knives only have a single function, thus requiring both to be carried, leading to increased living costs and inconvenience. Existing technologies also include simple methods to fix a utility knife to a blade of existing scissors, thereby achieving the functions of both scissors and a utility knife. For example, Chinese patent application number 201120314319.3, entitled "Multifunctional Scissors," discloses a multifunctional pair of scissors. The scissors include a pair of blades, which are crossed and pivotally connected. Each blade has a cutting edge and a backing edge, and a handle at one end. One blade has a cavity in its backing edge containing a blade. The cavity has an opening at the end of the blade, through which the blade extends. The cavity also has a groove, and a pusher block is connected to the blade. The pusher block slides in the groove, moving the blade. The edge of the groove has serrated edges to restrict the sliding of the pusher block. This pair of scissors integrates a utility knife blade into its scissor blades. The blade can be retracted into a housing cavity for use as scissors. When the utility knife is needed, the scissors can be closed and the blade extended for use, saving storage space and offering convenience. However, the aforementioned existing technology does not fundamentally achieve integration of scissors and a utility knife. In utility knife mode, it uses the utility knife blade, while in scissor mode, it uses the cutting edge of the scissor body. This involves multiple cutting components, failing to simultaneously utilize the cutting edge of the scissor body for both scissor mode cutting and utility knife mode cutting. Furthermore, it requires modification of the scissor body and adaptation of the blade's shape and size. Consequently, its manufacturing and usage reliability are low, and it is relatively inconvenient to use. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a pair of scissors that combines scissor mode and utility knife mode, wherein a cutting part of the scissors can simultaneously serve as the cutting part in the scissor mode and the cutting part in the utility knife mode.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A pair of scissors includes a first blade and a second blade rotatably connected to each other by a pin. A first shearing part is provided on the upper surface of the first blade opposite to the second blade. A guard plate is fixedly connected to the inner side of the second blade along its length. A blade holder is slidably connected to the opposite end faces of the second blade and the guard plate along its length. A blade with its cutting edge below the lower end face of the guard plate is connected to the blade holder. The cutting edge of the blade is opposite to and abuts against the first shearing part. A push plate is provided on the upper end face of the blade holder, extending above the upper end face of the second blade. A blade outlet is provided at the front end of the second blade and the guard plate. When the push plate is pushed towards the front end of the second blade, the cutting edge of the blade can pass through the blade outlet.

[0006] Preferably, a connecting block is provided on the second blade, an elastic element is arranged along the length direction of the second blade and one end of the elastic element is fixed on the connecting block, and the other end of the elastic element is fixed on the blade holder. The elastic element causes the blade holder to be subjected to a force toward the pin shaft. When the push plate is not pushed, the end face of the blade holder opposite to the pin shaft is limited to the rear end of the second blade under the action of the elastic element.

[0007] Preferably, a blade groove is provided on the inner end face of the second blade along the length of the second blade, and a guard plate groove is provided on the inner end face of the guard plate along the length of the second blade. A blade slider that matches the blade groove and a guard plate slider that matches the guard plate groove are respectively provided on the end faces of the blade holder opposite to the second blade and the guard plate.

[0008] Preferably, the connecting block is fixed in the blade slide groove near one end of the pin, the elastic element is a tension spring, the tension spring is disposed in the blade slide groove, one end of the tension spring is fixed on the connecting block, and the other end of the tension spring is fixed on the blade slider.

[0009] Preferably, a limiting notch communicating with the blade slide groove is provided on the lower end face of the second blade. When the push plate is not pushed, the blade slider on the blade holder away from the pin shaft is positioned opposite to the limiting notch. When the first and second blades are closed and the push plate is pressed, the first blade pushes the blade upward to prevent the blade slider from moving into the limiting notch. When the first and second blades are open and the push plate is pressed, the blade slider can move into the limiting notch.

[0010] Preferably, the tool holder is a plate-shaped structure, and a blade limiting groove matching the shape of the blade is provided on the end face of the tool holder opposite to the guard plate. A blade locking protrusion matching the blade mounting hole is provided on the end face of the blade limiting groove opposite to the guard plate. The blade is locked on the blade locking protrusion and in the blade limiting groove.

[0011] Preferably, symmetrical L-shaped tool changing slots are provided on the end faces of the tool holder on both sides of the blade locking protrusion, and a tool changing paddle extending to the top of the second blade is provided on the upper end face of the tool holder above the blade locking protrusion; a tool changing notch with its opening direction facing the guard plate is provided on the second blade, and a tool changing groove is provided on the inner end face of the second blade below the tool changing notch; when the tool changing paddle is pressed into the tool changing notch, the tool holder between the two tool changing slots moves into the tool changing groove.

[0012] Preferably, a retaining plate is provided on the push plate end face above the second cutter body, opposite to the guard plate, and a U-shaped retaining block is provided on the upper surface of the guard plate near the pin shaft, opposite to the retaining plate. The retaining plate can be locked in the retaining block, and the push plate is made of elastic material.

[0013] Preferably, the front end of the second blade is provided with a blade locking protrusion facing the pin shaft, and the front end of the guard plate is provided with a guard plate locking groove that matches the blade locking protrusion. The front end of the guard plate is locked by the blade locking protrusion and the guard plate locking groove, and the rear end of the guard plate is bolted to the second blade.

[0014] Preferably, the front ends of the second blade and the guard plate are mutually matched bending structures facing the direction of the first blade, and the bending portions of the second blade and the guard plate are provided at the front ends of the blade and the first shearing portion.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention, by setting a first blade body, a guard plate, a second blade body, a blade, and a first shearing part, can push out the blade that is slidably fixed on the first blade body and the guard plate from the blade outlet when the push plate is pushed, thereby realizing the switching between scissor mode and utility knife mode, thus realizing the integration of scissors and utility knife and sharing the same blade. This scissors has a high degree of integration and is reliable in use.

[0017] 2. By setting up elastic elements, the blade and blade holder automatically rebound after use in utility knife mode. In particular, the elastic elements are tension spring structures, which are simple and reliable. By setting up blade slide grooves, guard plate slide grooves, blade sliders and guard plate sliders, the blade holder slides more stably and smoothly on the second blade and guard plate.

[0018] 3. By setting a limiting notch and the interlocking of the limiting notch, the blade slider, and the push plate, the knife can only be switched to utility knife mode after the first and second blades are closed, thus preventing accidental injury to the user from the blade and the cutting edge of the first cutting part. The blade replacement groove and blade replacement device are set on the knife holder, making the blade easier to replace. In addition, the blade replacement notch and groove are set on the blade body, allowing the blade to be replaced without removing the guard plate.

[0019] 4. By setting a locking plate and locking block, the push plate is limited to prevent accidental operation of the push plate and accidental injury to the user by the blade; by setting the blade body locking protrusion and the guard plate locking groove, the connection between the second blade body and the guard plate is more reliable and the installation is more convenient. Attached Figure Description

[0020] Figure 1 This is a first-view structural diagram of the closed state of the present invention.

[0021] Figure 2 This is a schematic diagram of the second-view structure of the present invention in its closed state.

[0022] Figure 3 This is a schematic diagram of the scissor mode of the present invention.

[0023] Figure 4 This is a structural schematic diagram of the utility knife mode of the present invention.

[0024] Figure 5 For Figure 4 A top-view structural diagram based on the reference point.

[0025] Figure 6 This is a first-view structural diagram of the various components of the present invention in the event of an explosion.

[0026] Figure 7 This is a second-view structural diagram of the various components of the present invention in the form of an explosion.

[0027] Figure 8 This is a first-view structural schematic diagram of the second blade of the present invention.

[0028] Figure 9 This is a schematic diagram of the second blade of the present invention from a second perspective.

[0029] Figure 10 This is a schematic diagram of the connection between the tool holder and the blade of the present invention.

[0030] Figure 11 This is a first-view structural schematic diagram of the tool holder of the present invention.

[0031] Figure 12 This is a second-view structural schematic diagram of the tool holder of the present invention.

[0032] Figure 13 This is a first-view structural schematic diagram of the protective plate of the present invention.

[0033] Figure 14 This is a second-view structural schematic diagram of the protective plate of the present invention.

[0034] Figure 15 This is a schematic diagram of the structure of the first blade of the present invention.

[0035] Figure 16Schematic diagram of the installation structure of the first blade body and the tool rest of the present invention.

[0036] Figure 17 is Figure 16 Enlarged schematic diagram of part A of

[0037] Figure 18 Schematic diagram of the structure of the present invention after removing the guard plate.

[0038] Figure 19 is Figure 18 Enlarged schematic diagram of part B of

[0039] In the figure: 1. Pin shaft, 2. First blade body, 21. Blade longitudinal plate, 22. Blade transverse plate, 23. First shearing part installation groove, 24. First shearing part, 25. First blade body limiting block, 26. Abutting block, 3. Second blade body, 31. Blade outlet, 32. Blade body sliding groove, 321. Upper blade body sliding groove, 322. Lower blade body sliding groove, 323. Limiting notch, 33. Connecting block, 34. Sliding notch, 35. Blade body clamping protrusion, 36. Clamping notch, 37. Guide plate, 38. Tool change notch, 39. Tool change groove, 4. Handle, 5. Guard plate, 51. Guard plate sliding groove, 52. Guard plate clamping protrusion, 53. Guard plate clamping groove, 54. Guide groove, 55. Clamping block, 6. Tool rest, 61. Push plate, 611. Clamping plate, 62. Blade body slider, 621. Upper blade body slider, 622. Lower blade body slider, 63. Guard plate slider, 64. Blade limiting groove, 65. Blade clamping protrusion, 66. Tool change through groove, 67. Tool change拨片, 68. Push block, 7. Blade, 71. Blade installation hole, 8. Tension spring. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0042] Embodiment:

[0043] See attached Figure 1, 2 As shown in Figures 3, 4, and 5, a pair of scissors includes a first blade body 2 and a second blade body 3 that are rotatably connected to each other by a pin shaft 1. The first blade body 2 and the second blade body 3 are arranged opposite to each other. The first blade body 2 and the second blade body 3 extend towards the rear end of the pin shaft 1 and form corresponding handles 4. Shearing components are provided on both the first blade body 2 and the second blade body 3. When the handles are relatively pressed and rotated about the pin shaft 1, the shearing components of the first blade body 2 and the second blade body 3 abut against each other to achieve the function of the scissors. This shearing principle is prior art and will not be elaborated here.

[0044] In this embodiment, regarding the description of directions: the inner side is the spatial direction where the first blade body 2 and the second blade body 3 face each other, and the outer side is the spatial direction where the first blade body 2 and the second blade body 3 face away from each other; the front end is the end away from the handle 4, and the rear end is the end close to the handle 4.

[0045] See the attached Figure 6 , 7 As shown in Figures 11 and 12, a guard plate 5 is fixedly connected along the length direction of the second blade body 3 on the inner side of the second blade body 3. A tool holder 6 is slidably connected along the length direction of the second blade body 3 on the end face where the second blade body 3 and the guard plate 5 face each other. A blade 7 with its cutting edge below the lower end face of the guard plate 5 is connected to the tool holder 6. The shearing component of the second blade body 3 is the blade 7. A push plate 61 extending above the upper end face of the second blade body 3 is fixedly connected to the upper end face of the tool holder 6. A blade outlet 31 is provided at the front end of the second blade body 3 and the guard plate 5.

[0046] See the attached Figure 15 , 18 As shown in Figures 18 and 19, the first blade body 2 includes a blade body longitudinal plate 21 and a blade body transverse plate 22. The blade body longitudinal plate 21 and the blade body transverse plate 22 enclose a first shearing part installation groove 23. A first shearing part 24 is embedded and installed in the first shearing part installation groove 23 with its cutting edge facing upwards. The front shearing component of the first blade body 2 is the first shearing part 24. The front end of the blade body longitudinal plate 21 and the blade body transverse plate 22 is connected by a first blade body limiting block 25 integrally formed with the two. An abutting block 26 is integrally formed on the upper end face of the first blade body limiting block 25 at the front end of the blade body transverse plate 22.

[0047] Of course, the first blade body 2 can also be integrally formed with the first shearing part 24. At this time, the first shearing part 24 can be the blade body longitudinal plate 21. The front end of the blade body longitudinal plate 21 and the blade body transverse plate 22 is connected by a first blade body limiting block 25 integrally formed with the two. An abutting block 26 is integrally formed on the upper end face of the first blade body limiting block 25 at the front end of the blade body transverse plate 22.

[0048] See the attached Figure 18 , 19As shown, when the first blade 2 and the second blade 3 are closed together, the lower end face of the second blade 3 abuts against the upper end face of the abutment block 26, the lower end face of the blade 7 abuts against the upper end face of the first blade limiting block 25, and the blade 7 abuts against the opposite side of the first shearing part 24. Therefore, by setting the first blade limiting block 25 and the abutment block 26, the blade 7 and the first shearing part 24 can be limited when the first blade 2 and the second blade 3 are closed, preventing damage to the blade 7 and the shearing edge of the first shearing part 24 or a reduction in shearing accuracy due to excessive tightness. Of course, to achieve the scissor function, when cutting items in scissor mode, the blade edge of the blade 7 abuts against the blade edge of the first shearing part 24 to improve shearing accuracy.

[0049] With the above structure, when the push plate 61 is pushed towards the front end of the second blade 3, the cutting edge of the blade 7 can pass through the blade outlet 31, which is the utility knife mode, and cutting can be performed through the cutting edge of the blade 7; when the push plate 61 is not pushed, the initial state is the scissors mode, and the handle 4 can be operated to cut items. The specific structure of each component is explained below.

[0050] See appendix Figure 8-14 As shown, to achieve the sliding fixation of the tool holder 6 on the second blade 3 and the guard plate 5 and to allow for smooth sliding along the length of the second blade 3, a sliding notch 34 is provided on the inner end face of the second blade 3, allowing the push plate 61 to reciprocate within the sliding notch 34. A blade groove 32 is provided parallel to the length of the second blade 3 on the inner end face of the second blade 3 on the sidewall of the sliding notch 34, and a guard plate groove 51 is provided parallel to the length of the second blade 3 on the inner end face of the guard plate 5. A blade slider 62 matching the blade groove 32 and a guard plate slider 63 matching the guard plate groove 51 are integrally formed on the end faces of the tool holder 6 opposite to the second blade 3 and the guard plate 5, respectively.

[0051] To further improve the smoothness and stability of the sliding of the tool holder 6, the tool body slide 32 is provided with an upper tool body slide 321 and a lower tool body slide 322 that are parallel to each other. Meanwhile, to limit the sliding of the tool holder 6 in the tool body slide 32, both the upper tool body slide 321 and the lower tool body slide 322 are split structures. Specifically, the upper tool body slide 321 is divided into a front upper tool body slide 321 and a rear upper tool body slide 321 that are not connected to each other, and the lower tool body slide 322 is divided into a front lower tool body slide 322 and a rear lower lower tool body slide 322 that are not connected to each other. The lengths of the upper tool body slide 321 and the lower tool body slide 322 can be set according to the dimensions of the cutting edge of the blade 7 extending outside the blade outlet 31. Correspondingly, the blade slider 62 of the blade holder 6 includes an upper blade slider 621 and a lower blade slider 622 that are respectively slidably embedded in the upper blade groove 321 and the lower blade groove 322.

[0052] Thus, through the above-mentioned structure, the blade slider 62 and the guard plate slider 63 are respectively slidably embedded in the blade groove 32 and the guard plate groove 51, thereby achieving the stability of the blade holder 7 when it reciprocates along the direction of the second blade 3 and limiting the length of the blade 7 that passes through the blade outlet 31.

[0053] See appendix Figure 6 , 7 As shown, to prevent the blade 7 from protruding from the blade outlet 31 in case of impact or misoperation, a connecting block 33 is integrally formed in the lower blade groove 322 on the inner end face of the second blade 3. An elastic element is arranged along the length of the second blade 3, with one end fixed to the connecting block 33 and the other end fixed to the blade holder 6. By setting the elastic element, the blade holder 6 is subjected to a force towards the pin 1 in the initial state, i.e., the scissor mode. At this time, under the action of the elastic element, when the push plate 61 is not pushed, the push plate 61 is blocked on the side wall of the second blade 3 corresponding to the sliding notch 34, thereby fixing the position of the blade 7. When it is necessary to change to the utility knife mode, the push plate 61 needs to be pushed to overcome the elastic force of the elastic element.

[0054] In this embodiment, the connecting block 33 and the second blade 3 are integrally formed and fixed in the lower blade slide groove 322 at the rear end, near the pin 1. The elastic element is a tension spring 8, with one end fixed to the connecting block 33 and the other end fixed to the lower blade slider 622. When the push plate 61 is pushed, it is subjected to the elastic tension of the tension spring 8. Of course, in another embodiment, the elastic element can also be a spring. In this case, the connecting block 33 and the second blade 3 are integrally formed and fixed in the lower blade slide groove 322 at the front end, away from the pin 1. One end of the spring is fixed to the connecting block 33, and the other end is fixed to the lower blade slider 622. When the push plate 61 is pushed, it is subjected to the compressive force of the spring.

[0055] Thus, through the above structure, in the initial state, i.e. scissor mode, the blade holder 6 is tightened and fixed by the tension spring 8. When it is necessary to change to utility knife mode, the push plate 61 is pushed so that the front edge of the blade 7 passes through the blade outlet 31. When the push plate 61 is released, under the action of the tension spring 8, the blade holder 6 drives the blade 7 to automatically spring back to the initial position.

[0056] In order to allow for the replacement of the blade 7, this embodiment adopts a detachable design for the guard plate 5 and the second blade 3.

[0057] See appendix Figure 8-14As shown, a blade engaging protrusion 35 is integrally formed on the inner end face of the front end of the second blade 3, and the blade outlet 31 is formed on the end face of the blade engaging protrusion 35. Two guard plate engaging protrusions 52, facing the second blade 3, are integrally formed on the inner end face of the front end of the guard plate 5. Guard plate engaging grooves 53, matching the blade engaging protrusions 35, are formed on the guard plate engaging protrusions 52. The front end of the guard plate 5 is engaged with the blade engaging protrusions 35 and the guard plate engaging grooves 52, and the rear end of the guard plate 5 is bolted to the second blade 3. To facilitate the engagement between the front end of the guard plate 5 and the front end of the second blade 3, an engaging notch 36 is formed on the upper end face of the second blade 3 at the rear end of the blade engaging protrusion 35. To limit and guide the engagement of the guard plate 5 and the second blade 3, a guide plate 37 extends from the upper end of the second blade 3 towards the guard plate 5 at the engagement notch 36. A guide groove 54 is provided at a corresponding position on the inner end face of the guard plate 5. When installing the guard plate 5, the guard plate engagement protrusion 52 at the front end of the guard plate 5 is embedded in the engagement notch 36, and then pushed towards the blade engagement protrusion 35, causing the guide groove 54 to slide along the guide plate 37, thereby engaging the second blade 3 and the guard plate 5. By setting the blade engagement protrusion 35 and the guard plate engagement groove 53, the connection between the guard plate 5 and the second blade 3 is made more stable, and only one bolt is needed to firmly fix the guard plate 5 to the second blade 3.

[0058] See appendix Figure 10 As shown, the blade 7 used in this embodiment has a trapezoidal structure and a blade mounting hole 71 is provided on the blade 7. The tool holder 6 has a plate-shaped structure. A blade limiting groove 64 matching the shape of the blade 7 is provided on the end face of the tool holder 6 opposite to the guard plate 5. A blade locking protrusion 65 matching the blade mounting hole 71 is integrally formed on the end face of the blade limiting groove 64 opposite to the guard plate 5. The blade locking protrusion 65 is located near the front end of the second blade body 3. The push plate 61 is located at the top of the tool holder 6 between the blade locking protrusion 65 and the pin 1. The blade 7 is locked on the blade locking protrusion 65 and in the blade limiting groove 64.

[0059] Symmetrical L-shaped tool changing slots 66 are provided on the end faces of the tool holder on both sides of the blade retaining protrusion 65. A tool changing lever 67 extending to the top of the second blade body 3 is integrally formed on the upper end face of the tool holder 6 above the blade retaining protrusion 65. When changing the blade, the tool changing lever 67 is pushed towards the second blade body 3. The tool changing lever 67 causes the blade retaining protrusion 65 to tilt towards the second blade body 3. The blade 7 gradually disengages from the blade retaining protrusion 65 under the obstruction of the groove wall of the blade limiting groove 64, and the user can then remove the blade 7 for replacement.

[0060] Thus, the design of the aforementioned guard plate 5 and tool holder 6 facilitates the replacement of the blade 7. To improve the elasticity of the tool holder 6 between the two tool changing slots 66, so as to facilitate the pushing of the tool changing lever 67, the thickness of the tool holder 6 between the two tool changing slots 66 is less than the thickness of other parts of the tool holder 6. Furthermore, a bottom groove communicating with the tool changing slots 66 is further provided at the bottom of the tool holder 6 between the two tool changing slots 66.

[0061] See appendix Figure 8 , 9 As shown, in this embodiment, the following technical solution is adopted in order to achieve the function of replacing the blade 7 without removing the protective plate 5.

[0062] A tool changing notch 38 is provided on the second blade 3, with its opening facing the guard plate 5. The tool changing notch 38 is located near the rear end of the guide plate 37. A tool changing groove 39 is provided on the inner end face of the second blade 3 below the tool changing notch 37. The size of the tool changing groove 39 is not less than the size of the tool holder 6 between the two tool changing through slots 66.

[0063] When the push plate 61 is pushed towards the front end of the second blade 3 until the tool changer 67 stops at the position corresponding to the tool change notch 38, the front edge of the blade 7 protrudes beyond the blade outlet 31. When the tool changer 67 is pressed into the tool change notch 38, the tool holder 6 between the two tool change slots 66 moves into the tool change groove 39. The tool changer 67 causes the blade locking protrusion 65 to tilt towards the second blade 3. The blade 7 gradually disengages from the blade locking protrusion 65 under the obstruction of the blade limiting groove 64 wall. After the user removes the blade 7 from the blade outlet 31, the new blade 7 is inserted from the blade outlet 31 into the blade mounting hole 71 and fitted onto the blade locking protrusion 65.

[0064] To prevent accidental pushing of the push plate 61 towards the front end of the second blade 3, which could lead to safety hazards, it is necessary to limit the push plate 61 when it is pushed.

[0065] See appendix Figure 11 , 13As shown in Figure 14, in this embodiment, a retaining plate 611 is provided on the end face of the push plate 61 above the second blade 3, opposite to the guard plate 5. A U-shaped retaining block 55 is provided on the upper end face of the guard plate 5 near the pin 1, opposite to the retaining plate 611. In scissor mode, the retaining plate 611 can be locked in the retaining block 55. The push plate is made of elastic material, and the distance between the inner end face of the second blade 3 at the sliding notch 34 and the corresponding inner end face of the guard plate 5 is greater than the thickness of the push plate 61. Therefore, when it is necessary to push the push plate 61 to change to utility knife mode, the push plate 61 needs to be pushed towards the inner end face of the second blade 3 to disengage the retaining plate 611 from the slot of the retaining block 55, and then the push plate 61 needs to be pushed towards the front end of the second blade 3. In order to facilitate pushing towards the inner end face of the second blade 3 and towards the front end of the second blade 3, a push block 68 is integrally formed horizontally on the upper end face of the push plate 61, and the upper end face of the push block 68 is provided with anti-slip protrusions.

[0066] See appendix Figure 8 , 16 As shown in Figure 17, in order to restrict the transformation of the utility knife mode, that is, when the first blade 2 and the second blade 3 are in scissor mode, the transformation of the utility knife mode cannot be performed and the push plate 61 cannot be pushed, so as to avoid the blade 7 and the blade of the first blade 2 accidentally injuring the user, the following technical solution is adopted in this embodiment.

[0067] A limiting notch 323 is provided on the lower end face of the second blade 3 along the length direction of the second blade 3, connecting the lower blade slide groove 322 at the front end. The length of the limiting notch 323 is not less than the length of the lower blade slider 622 at the front end. The position of the limiting notch 323 is: in the initial state of the scissor mode, that is, when the clamping plate 611 is clamped in the clamping block 55, the lower blade slider 622 at the front end stops. In this state, the lower end face of the lower blade slider 622 at the front end is flush with the upper end face of the lower blade slide groove 322 at the front end, and the longitudinal height of the upper blade slide groove 321 corresponding to the upper blade slider 621 at the front end is greater than the longitudinal height of the upper blade slider 621 at the front end. At this time, the upper end of the upper blade slider 621 at the front end is flush with the upper end face of the upper blade slide groove 321, but there is still some space below it.

[0068] Although the push plate 61 is pushed towards the front end of the second blade 3, in actual use, the push block 68 is pressed down and the push plate 61 is pushed. Therefore, in the scissor mode when the first blade 2 and the second blade 3 are open, pressing and pushing the push block 68 causes the lower blade slider 622 at the front end to be pressed into the limiting notch 323. At this time, the end face of the second blade 3 at the limiting notch 323 blocks the lower blade slider 622, preventing the push block 68 and the blade holder 6 from being pushed, thus preventing the switch to utility knife mode and making it safer to use. When the first blade 2 and the second blade 3 are closed and the push block 68 is pressed and pushed, the blade cross plate 222 of the first blade 2 presses upward against the blade 7, preventing the lower blade slider 622 at the front end from moving into the limiting notch 323. This allows the push block 68 to be pushed towards the front end of the second blade 3 to switch to utility knife mode.

[0069] See appendix Figure 8 , 13 As shown, in order to hide the front edge of the blade 7 and the first shearing part 24 when the first blade 2 and the second blade 3 are closed, so as to avoid accidentally injuring the user, the front ends of the second blade 2 and the guard plate 5 are mutually matched bending structures facing the direction of the first blade 2, and the bending parts of the second blade 3 and the guard plate 5 are provided at the front ends of the blade 7 and the first shearing part 24.

[0070] Therefore, through the above structure, the scissors in this embodiment have a scissor mode and a utility knife mode, and the blade 7 can be quickly replaced without removing the guard plate 5. Furthermore, during the transition to utility knife mode, the push plate 61 and the blade holder 6 are limited, and the blade holder 6 has an automatic spring-back function after use in utility knife mode. The following describes the usage process of the scissors in this embodiment:

[0071] 1. Scissors Mode:

[0072] This invention is in scissor mode by default in its initial state; see appendix. Figure 3 As shown, by holding the handle 4 and opening and closing the first blade 2 and the second blade 3, the scissors can be used for cutting.

[0073] 2. Utility knife mode:

[0074] When switching from scissors mode to utility knife mode, the first blade 2 and the second blade 3 must be closed (as shown in the attached diagram). Figure 3 When the first blade 2 and the second blade 3 are opened as shown, it is impossible to switch to utility knife mode (i.e., the blade 7 cannot be extended). See attached document. Figure 1 , 2As shown, press the push block 68 and push it towards the second blade, causing the latch 611 to disengage from the latch 55. Then, press and push the push block 68 to move the blade holder 6 towards the front end of the second blade 3, so that the front edge of the blade 7 can pass through the blade outlet 31. Then, use it in utility knife mode. After use, the blade holder 6 will automatically return to its original position under the action of the tension spring 8.

[0075] 3. Replace the blade

[0076] When it is necessary to change blade 7, the first blade 2 and the second blade 3 must be closed. Follow the above-described utility knife mode change process to push the push block 68 until the blade change lever 67 aligns with the blade change notch 38 (see appendix). Figure 4 (As shown), then press the tool changer 67 into the tool changer notch 38. At this time, the blade 7 can be pulled out from the blade outlet 31. Then insert the new blade 7 from the blade outlet 31 into the blade mounting hole 71 and lock it on the blade locking protrusion 65. Then release the tool changer 67.

[0077] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pair of scissors, comprising a first blade and a second blade rotatably connected to each other by a pin, wherein a first cutting portion is provided on the upper surface of the first blade opposite to the second blade, characterized in that: A guard plate is fixedly connected to the inner side of the second blade along the length of the second blade. A blade holder is slidably connected to the opposite end faces of the second blade and the guard plate along the length of the second blade. A blade with its cutting edge below the lower end face of the guard plate is connected to the blade holder. The cutting edge of the blade is opposite to and abuts against the first shearing part. A push plate extending to the upper end face of the blade holder is provided, and a blade outlet is provided at the front end of the second blade and the guard plate. When the push plate is pushed towards the front end of the second blade, the cutting edge of the blade can pass through the blade outlet. A blade slide groove is provided on the inner end face of the second blade along the length of the second blade, and a guard plate slide groove is provided on the inner end face of the guard plate along the length of the second blade. A blade slider that matches the blade slide groove and a guard plate slider that matches the guard plate slide groove are respectively provided on the end faces of the blade holder opposite to the second blade and the guard plate. A limiting notch communicating with the slide groove of the blade is provided on the lower end face of the second blade. When the push plate is not pushed, the blade slider on the blade holder away from the pin shaft is positioned opposite to the limiting notch. When the first blade and the second blade are closed and the push plate is pressed, the first blade pushes the blade upward to prevent the blade slider from moving into the limiting notch. When the first blade and the second blade are open and the push plate is pressed, the blade slider can move into the limiting notch.

2. The scissors according to claim 1, characterized in that: A connecting block is provided on the second blade. An elastic element is arranged along the length of the second blade and one end of the elastic element is fixed to the connecting block. The other end of the elastic element is fixed to the blade holder. The elastic element causes the blade holder to be subjected to a force toward the pin. When the push plate is not pushed, the end face of the blade holder opposite to the pin is limited to the rear end of the second blade under the action of the elastic element.

3. The scissors according to claim 2, characterized in that: The connecting block is fixed in the slide groove of the blade near one end of the pin. The elastic element is a tension spring, which is set in the slide groove of the blade. One end of the tension spring is fixed to the connecting block, and the other end of the tension spring is fixed to the slide block of the blade.

4. The scissors according to claim 1, characterized in that: The tool holder is a plate-shaped structure. A blade limiting groove matching the shape of the blade is provided on the end face of the tool holder opposite to the guard plate. A blade locking protrusion matching the blade mounting hole is provided on the end face of the blade limiting groove opposite to the guard plate. The blade is locked on the blade locking protrusion and in the blade limiting groove.

5. The scissors according to claim 4, characterized in that: Symmetrical L-shaped tool changing slots are provided on the end faces of the tool holder on both sides of the blade locking protrusion. A tool changing paddle extending to the top of the second blade is provided on the upper end face of the tool holder above the blade locking protrusion. A tool changing notch with its opening direction facing the guard plate is provided on the second blade. A tool changing groove is provided on the inner end face of the second blade below the tool changing notch. When the tool changing paddle is pressed into the tool changing notch, the tool holder between the two tool changing slots moves into the tool changing groove.

6. The scissors according to claim 1, characterized in that: A retaining plate is provided on the push plate end face above the second cutter body, opposite to the guard plate. A U-shaped retaining block is provided on the upper surface of the guard plate near the pin shaft, opposite to the retaining plate. The retaining plate can be locked in the retaining block. The push plate is made of elastic material.

7. The scissors according to claim 1, characterized in that: The front end of the second blade is provided with a blade locking protrusion facing the pin shaft, and the front end of the guard plate is provided with a guard plate locking groove that matches the blade locking protrusion. The front end of the guard plate is locked by the blade locking protrusion and the guard plate locking groove, and the rear end of the guard plate is bolted to the second blade.

8. The scissors according to claim 1, characterized in that: The front ends of the second blade and the guard plate are mutually matched bending structures facing the direction of the first blade, and the bending part of the second blade and the guard plate is provided at the front end of the blade and the first shearing part.

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