A hand-knife-pulling structure

Abstract

The application discloses a hand-knitting knife structure, which comprises two mutually jointed knife shells, namely a zinc alloy front knife shell and a zinc alloy rear knife shell, wherein the outer sides of the zinc alloy front knife shell and the zinc alloy rear knife shell are respectively provided with a front knife shell panel and a rear knife shell panel; an aluminum alloy handle, a first gear, a second gear, a knife seat, a pressing plate and a carbon steel safety switch are arranged inside the zinc alloy front knife shell and the zinc alloy rear knife shell; the application has stable operation, simple use, convenient knife changing and improved use efficiency.

Description

Technical Field

[0001] The invention relates to a hand-pinch knife structure. Background Art

[0002] Courier work is a very busy job. During the work, the express items need to be packed in packaging boxes or packaging bags. When packing and sealing, a knife is needed to help cut the sealing tape. However, due to the simple structure of the existing knife, it lacks safety when operating and is also troublesome to operate. In addition, since the knife is often used in courier work, even if the blade breaks, it is inconvenient to replace the blade, which increases the trouble of use. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a hand-pinch knife structure.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A hand-pinch knife structure includes two mutually connected knife shells, wherein the two mutually connected knife shells are respectively a zinc alloy front knife shell and a zinc alloy rear knife shell, and the outer sides of the zinc alloy front knife shell and the zinc alloy rear knife shell are both installed with a front knife shell panel and a rear knife shell panel;

[0006] An aluminum alloy handle, a first gear, a second gear, a knife seat, a pressure plate and a carbon steel safety switch are installed between the zinc alloy front blade housing and the zinc alloy rear blade housing;

[0007] The aluminum alloy handle includes a handle rod and a fixing plate provided on the handle rod and provided with a longitudinal opening, an engaging plate provided with teeth and a torsion spring mounting portion on one side, and a plug-in post for respectively plugging into the longitudinal opening and the torsion spring mounting portion is provided on the zinc alloy rear blade shell, which are plug-in post 1 and plug-in post 2 respectively. A torsion spring is installed in the torsion spring mounting portion, and the torsion spring is fixed in the torsion spring mounting portion by a carbon steel rotating shaft pin and is installed in the zinc alloy rear blade shell;

[0008] The first gear and the second gear are meshed and installed in the zinc alloy rear blade housing. Two wheel columns are used to install the first and second gears on the zinc alloy rear blade housing. The first gear includes an inner gear and an outer gear. The inner gear is protruding and installed at the center of the outer gear and meshes with the meshing plate.

[0009] The knife seat is provided with a mounting cavity, in which a blade is mounted, with the front end of the blade exposed in the mounting cavity. A hook body is provided on the knife seat, and a matching hook body is provided on the zinc alloy rear blade housing. One end of the knife seat spring is hooked on the hook body, and the other end thereof is hooked on the matching hook body.

[0010] One end of the zinc alloy transmission rod is mounted in the zinc alloy rear blade housing through a transmission rod spring hook, and a row of saw teeth is provided on the bottom surface of the zinc alloy transmission rod, which meshes with the second gear;

[0011] The pressure plate is provided with a mounting opening, in which a carbon steel safety switch is installed, and mounting holes are provided at both ends of the pressure plate. Two matching mounting holes matching the mounting holes are provided in the zinc alloy rear blade housing, which are fixed by two screws.

[0012] As a further limitation of the present invention, the front blade housing panel and the rear blade housing panel are respectively provided with two screw holes, and the front blade housing and the rear blade housing are both provided with studs that match the two screw holes, which are screwed together by carbon steel blade housing screws.

[0013] As a further limitation of the present invention, the material of the front blade shell panel and the front blade shell panel are both PP+TPR.

[0014] As a further limitation of the present invention, a tool-changing switch is installed on the top surface of the tool holder, and an accommodating opening for accommodating the tool-changing switch is provided on the top surface of the zinc alloy rear tool housing.

[0015] As a further limitation of the present invention, the torsion spring mounting portion is composed of two torsion spring mounting plates, and a pin hole for passing through the carbon steel rotating shaft pin is provided on the two torsion spring mounting plates.

[0016] As a further limitation of the present invention, the torsion spring has a through hole for inserting the carbon steel shaft pin.

[0017] The beneficial effects achieved by the present invention are as follows: utilizing the principle of a speed-changing gear set, when the aluminum alloy handle is squeezed by hand, the gear installed inside is driven by the meshing of the aluminum alloy handle, thereby adjusting the knife length and facilitating cutting; the first and second gears installed in the knife housing are stably and reliably transmitted, the speed change length is equal each time and the force is evenly distributed, and the force changes of acceleration and deceleration when subjected to force are stable, so the knife-discharging structure can operate smoothly, is simple to use, facilitates knife changing, and improves the efficiency of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Fig. 1 It is a schematic diagram of the decomposition structure of the present invention;

[0020] Figs. 2-3 This is a schematic diagram of the present invention in a non-knife-out state;

[0021] Figs. 4-5 This is a schematic diagram of the present invention showing the maximum state of the knife;

[0022] Figs. 6-7 Is the schematic diagram of the carbon steel safety switch of the present application in the unlocked state;

[0023] Figs. 8-9 Is the schematic diagram of the carbon steel safety switch of the present application in the locked state;

[0024] Figs. 10-11 Is the schematic diagram of the carbon steel safety switch of the present application in the usable state and unable to change the blade;

[0025] Figs. 12-13 Is the schematic diagram of the carbon steel safety switch of the present application in the state of stopping the blade;

[0026] Figs. 14-15 Is the schematic diagram of the carbon steel safety switch of the present application in the state of using the blade.

[0027] In the figure: zinc alloy front blade shell 1, zinc alloy rear blade shell 11, accommodating port 12, stud 13, insertion column 1 14, insertion column 2 141, wheel column 15, matching installation hole 16, front blade shell faceplate 2, rear blade shell faceplate 21, screw hole 22, carbon steel blade shell screw 23, aluminum alloy handle 3, handle rod 31, fixed plate 32, longitudinal plate 321, meshing plate 33, tooth 331, torsional spring installation part 34, torsional spring installation plate 341, pin hole 342, torsional spring 4, through hole 41, carbon steel rotating shaft pin 42, first gear 5, inner gear 51, outer gear 52, second gear 6, wheel hole 61, blade seat 7, hook body 71, installation cavity 72, blade 73, blade seat spring 74, elastic piece 75, zinc alloy transmission rod 8, sawtooth 81, transmission rod spring 82, pressing plate 9, installation hole 91, screw 92, installation port 93, carbon steel safety switch 94, blade changing switch 100. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] Please refer to Figs. 1-15 The technical solution provided by the present application is a hand-held blade structure, which comprises two mutually connected blade shells, i.e., a zinc alloy front blade shell 1 and a zinc alloy rear blade shell 11. The outer sides of the zinc alloy front blade shell 1 and the zinc alloy rear blade shell 11 are respectively provided with a front blade shell faceplate 2 and a rear blade shell faceplate 21. The zinc alloy front blade shell 1 and the zinc alloy rear blade shell 11 are provided with a stud 13, which is fixed by a carbon steel blade shell screw 23, so that the zinc alloy front blade shell and the zinc alloy rear blade shell can be connected together. The materials of the front blade shell faceplate 2 and the rear blade shell faceplate 21 are PP+TPR, i.e., polypropylene+thermoplastic polyurethane. This kind of plastic is a polymer of two kinds of engineering plastics.

[0030] Between the zinc alloy front tool holder 1 and the zinc alloy rear tool holder 11, an aluminum alloy handle 3, a first gear 5, a second gear 6, a tool holder 7, a pressing plate 9 and a carbon steel safety switch 94 are internally installed;

[0031] The aluminum alloy handle 3 comprises a handle stem 31 and a fixed plate 32 provided on the handle stem 31 and provided with a longitudinal port 321, an engaging plate 33 provided with teeth 331 on one side and a torsion spring mounting portion 34, and the zinc alloy rear tool holder 11 is provided with a plug column one 14 and a plug column two 141 for being respectively plugged into the longitudinal port 321 and matched with the plug column two 141 of the torsion spring mounting portion 34, the longitudinal port is plugged into the plug column one, and a torsion spring 4 is mounted in the torsion spring mounting portion 34, the torsion spring is fixed in the plug column two provided in the torsion spring mounting portion by a carbon steel rotating shaft tip, the torsion spring mounting portion 34 is composed of two torsion spring mounting plates 341 with perforations, the torsion spring 4 is mounted between the two torsion spring mounting plates, the torsion spring 4 has a through hole 41 for inserting the carbon steel rotating shaft tip 42, and the two torsion spring mounting plates 341 are provided with tip holes 41 through which the carbon steel rotating shaft tip 42 passes, so that the carbon steel rotating shaft tip can pass through the tip hole to mount the button spring in the torsion spring mounting portion, and the carbon steel rotating shaft tip is inserted and fixed in the plug column two.

[0032] Further, the first gear 5 and the second gear 6 are engaged, the zinc alloy rear tool holder 11 is provided with wheel columns 15 for mounting the first and second gears, the wheel columns are provided with two, the first gear 5 comprises an inner gear 51 and an outer gear 52, the inner gear 51 is protrudingly and concentrically mounted at the center position of the outer gear 52, and the inner gear 51 is engaged with the engaging plate 33, so as to facilitate the pressing of the aluminum alloy handle to eject the tool.

[0033] The tool holder 7 is provided with a mounting cavity 72, a blade 73 is mounted in the mounting cavity 72, the front end of the blade 73 is exposed from the mounting cavity 72, a spring piece is mounted in the mounting cavity, the blade is inserted in the mounting cavity, the tool holder 7 is provided with a hook body 71, the zinc alloy rear tool holder 11 is provided with a matched hook body (not shown in the figure), one end of a tool holder spring 74 is hooked on the hook body 71, and the other end is hooked on the matched hook body, so that when the aluminum alloy handle is pressed, the inner gear in the first gear engaged with the teeth plate thereof is driven, since the outer gear is coaxially connected with the inner gear, the outer gear is rotated, thereby driving the second gear engaged with the outer gear to rotate, the second gear is engaged with the zinc alloy transmission rod, thus the tool holder is pushed forward by the zinc alloy transmission rod, due to the action of the tool holder spring, when the aluminum alloy handle is not pressed, the tool holder spring retracts the tool holder into the two mutually engaged tool holders.

[0034] One end of the zinc alloy transmission rod 8 is hooked in the zinc alloy rear blade housing through a transmission rod spring 82. A row of serrations 81 is provided on the bottom surface of the zinc alloy transmission rod 8, which meshes with the second gear 6, thereby achieving the function of pushing the blade holder to pull out the knife.

[0035] The pressure plate 9 is provided with a mounting opening 93, in which a carbon steel safety switch 94 is installed. Mounting holes 91 are provided at both ends of the pressure plate 9. Two matching mounting holes 16 are provided in the zinc alloy rear blade housing to match the mounting holes 91, which are fixed by two screws 92. The function of the carbon steel safety switch is as follows: Figs. 6-7 As shown, when the carbon steel safety switch is in the unlocked state, the aluminum alloy handle is unhooked from the carbon steel safety switch, so it is in an unobstructed state and can be used normally. Figs. 8-9 As shown, when the carbon steel safety switch is in the locked state, the carbon steel safety switch blocks the movement of the aluminum alloy handle, thus being in the locked state, and an unlocking mark is printed on the zinc alloy front blade shell for easy identification.

[0036] It should be further explained that a tool change switch 100 is installed on the top surface of the tool holder 7, and a receiving port 12 for receiving the tool change switch 100 is provided on the top surface of the zinc alloy rear tool housing 12, so the tool change switch has a tool change function. Figs. 10-11 As shown, when the tool change switch is in the horizontal state, it can be used normally and cannot change the tool. Figs. 12-13 In the state shown, when the aluminum alloy handle is pinched to the specified position, the blade stops moving forward due to the obstruction of the zinc alloy transmission rod and the tool change switch. For further clarity, as shown in the figure, Fig. 14 As shown in the figure, when the tool change switch is pressed down, it is unlocked. Fig. 15 As shown, when the tool continues to move forward, as indicated by the arrow in the figure, a spring piece 75 can be installed in the mounting cavity inside the tool holder. The spring piece on the tool holder moves upward along the slope provided in the tool holder and when the spring piece disengages the blade, the blade pops out.

[0037] Through the above description, the present invention has the following operating process:

[0038] 1. If Figs. 4-5 The gear speed change and knife-out process shown:

[0039] When the aluminum alloy handle is pressed upward and forms a force movement, the aluminum alloy handle drives the inner gear (that is, six small teeth) in the first gear to move in a circular motion through the meshing plate. The outer gear in the first gear meshes with the second gear, and the meshing direction changes from backward to forward in the direction of the knife edge. The second gear then meshes with the serrations of the zinc alloy transmission rod with the same number of teeth. The zinc alloy transmission rod drives the knife holder to move toward the knife edge with a buckle point. At this time, the retraction force of the rebound torsion spring and the rebound tension spring increases to the maximum force.

[0040] 2. The gear shifting rollback process as shown in Figs. 2-3 the direction of movement as shown by the arrow Fig. 3 :

[0041] When the aluminum alloy handle is released, the zinc alloy transmission rod drives the knife seat to roll back under the action of the elastic spring and the elastic torsion spring rollback force, and the second gear rotates backward, the second gear meshes with the outer gear in the first gear to rotate, the inner gear in the first gear is synchronized to shift backward and transmitted to the engagement plate provided on the aluminum alloy handle, and the aluminum alloy handle is rolled back to the initial position through the engagement plate under the limit of the insertion column.

[0042] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A hand-pinch knife structure, comprising two mutually engaged knife shells, characterized in that: The two mutually joined blade shells are respectively a zinc alloy front blade shell and a zinc alloy rear blade shell, and the outer sides of the zinc alloy front blade shell and the zinc alloy rear blade shell are both installed with a front blade shell panel and a rear blade shell panel; An aluminum alloy handle, a first gear, a second gear, a knife seat, a pressure plate and a carbon steel safety switch are installed between the zinc alloy front blade housing and the zinc alloy rear blade housing; The aluminum alloy handle includes a handle rod and a fixing plate provided on the handle rod and provided with a longitudinal opening, an engaging plate with teeth and a torsion spring mounting portion on one side, and a plug-in post for respectively plugging into the longitudinal opening and the torsion spring mounting portion is provided on the zinc alloy rear blade shell, which are plug-in post 1 and plug-in post 2 respectively. A torsion spring is installed in the torsion spring mounting portion, which is fixed in the torsion spring mounting portion by a carbon steel rotating shaft pin and is installed in the zinc alloy rear blade shell; The first gear and the second gear are meshed and installed in the zinc alloy rear blade housing. Two wheel columns are used to install the first and second gears on the zinc alloy rear blade housing. The first gear includes an inner gear and an outer gear. The inner gear is protruding and installed at the center of the outer gear and meshes with the meshing plate. The knife seat is provided with a mounting cavity, in which a blade is mounted, with the front end of the blade exposed in the mounting cavity. A hook body is provided on the knife seat, and a matching hook body is provided on the zinc alloy rear blade housing. One end of the knife seat spring is hooked on the hook body, and the other end thereof is hooked on the matching hook body. One end of the zinc alloy transmission rod is mounted in the zinc alloy rear blade housing through a transmission rod spring hook, and a row of saw teeth is provided on the bottom surface of the zinc alloy transmission rod, which meshes with the second gear; The pressure plate is provided with a mounting opening, in which a carbon steel safety switch is installed, and mounting holes are provided at both ends of the pressure plate, and two matching mounting holes matching the mounting holes are provided in the zinc alloy rear blade housing, which are fixed by two screws; A knife-changing switch is installed on the top surface of the knife seat, and an accommodating opening for accommodating the knife-changing switch is provided on the top surface of the zinc alloy rear knife shell. A spring is installed in the installation cavity of the knife seat. When the knife-changing switch is pressed down, the zinc alloy transmission rod and the knife seat are pushed forward, and the spring moves upward along the slope provided in the knife seat, and the spring unhooks the blade.

2. The hand-kneading knife structure according to claim 1, characterized in that: The front blade housing and the rear blade housing are both provided with studs, which are screwed together by carbon steel blade housing screws.

3. The hand-kneading knife structure according to claim 1, characterized in that: The materials of the front blade shell panel and the rear blade shell panel are both PP+TPR.

4. The hand-kneading knife structure according to claim 1, characterized in that: The torsion spring mounting portion is composed of two torsion spring mounting plates, and pin holes for passing the carbon steel rotating shaft pin are provided on the two torsion spring mounting plates.

5. The hand-kneading knife structure according to claim 1, characterized in that: The torsion spring has a through hole into which the carbon steel rotating shaft pin is inserted.

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