A hand-held corrugated paper cutter

Abstract

The application discloses a handheld corrugated paper cutter, which comprises a shell base, a driving motor, a punching rod base and a punching rod piece, the punching rod piece is movably arranged in the punching rod base, a lateral cutting opening is arranged at the punching rod base, a transmission piece is arranged in the shell base, the transmission piece is connected with the punching rod piece, the driving motor drives the transmission piece through a transmission mechanism, and the transmission piece drives the punching rod piece to punch the paperboard inserted into the lateral cutting opening. The motor is used for driving the punching rod piece instead of manually pressing and shearing, so that the operation burden of hands is effectively reduced, the structure design of the lateral cutting opening can not only ensure smooth insertion of the paperboard, but also prevent fingers from being mistakenly inserted, and the safety hidden danger of a traditional electric scissors is eliminated.

Description

Technical Field

[0001] This invention relates to the technical field of electric shearing devices, and in particular to a handheld corrugated paper cutter. Background Technology

[0002] Cutting cardboard is a very common step in crafting, especially when dealing with thick corrugated cardboard or multiple layers of cardboard. The choice of tools becomes particularly important in these situations. Using ordinary scissors relies entirely on the continuous pressure applied by the fingers and palm, and each opening and closing requires overcoming the strong resistance of the cardboard fibers. Maintaining a tight grip on thick cardboard for extended periods can easily lead to finger pain and even soreness in the web of the hand, making what should be a fun crafting activity quite strenuous.

[0003] In comparison, electric scissors have clear advantages. They rely on a motor to drive the blades at high speed, allowing users to simply hold the tool and guide the cutting path along the marked lines without having to press down forcefully, greatly reducing hand strain and maintaining comfort even during extended use. However, while acknowledging their convenience, it's also important to consider their potential safety hazards.

[0004] Chinese utility model patent CN221391146U discloses an electric scissor that uses a motor to drive the lower blade, causing it to swing up and down relative to the upper blade. While this design effectively achieves the cutting function, it also means the blade is constantly in a rapid and powerful reciprocating motion. If the hand gets too close to the blade during operation, there is a high risk of injury, a safety hazard that cannot be ignored. Most existing electric scissors suffer from this drawback and are unsuitable for children's crafts. Therefore, we propose a handheld corrugated paper cutter. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a handheld corrugated paper cutter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a handheld corrugated paper cutter, comprising a housing base, a drive motor, a punching rod base, and a punching rod, wherein the punching rod is movably disposed within the punching rod base, and the punching rod base is provided with a lateral cutting opening; the housing base is provided with a transmission mechanism and a transmission component, the input end of the transmission mechanism is connected to the drive motor, the output end of the transmission mechanism is connected to the transmission component, the transmission component is connected to the punching rod, the drive motor drives the transmission component through the transmission mechanism, and the transmission component drives the punching rod to punch the cardboard extending into the lateral cutting opening.

[0007] To further elaborate, the width of the lateral cutting opening of the punching rod seat is L1, and the height of the cutting edge of the punching rod is L2, where L2 > L1.

[0008] To elaborate further, for the width of the lateral cut, 2mm ≤ L1 < 15mm.

[0009] To elaborate further, the outer diameter of the punching rod seat is D1, the diameter of the punching rod is D2, and 1 / 4 ≤ D2 / D1 ≤ 2 / 5.

[0010] To further elaborate, the cross-sectional area of ​​the punching member is S1, and the cross-sectional area of ​​the cutting edge of the punching member is S2, where 3 / 10 ≤ S2 / S1 ≤ 7 / 10.

[0011] To further elaborate, one end of the transmission component is provided with a hinged ring opening, which is sleeved on the cam portion of the output gear of the transmission mechanism, and the other end of the transmission component is connected to the punching rod.

[0012] To further elaborate, a rotating ring is provided between the hinge ring portion of the transmission component and the cam portion of the output gear.

[0013] To elaborate further, the device includes an outer shell, a pressure plate for pressing down the cardboard during punching, a housing seat installed inside the outer shell, a punching rod extending outward from the bottom of the outer shell, and a pressure plate installed at the punching rod seat.

[0014] Furthermore, the outer casing is also equipped with an adjusting component, which is used to adjust the height position of the pressure plate component.

[0015] To further elaborate, the adjusting member has a through-hole, and the through-hole has a limiting tooth. The pressure plate has a plurality of toothed grooves, each toothed groove corresponding to a different installation height of the pressure plate. When the limiting tooth of the adjusting member is inserted into the corresponding toothed groove of the pressure plate, the pressure plate can be fixed at the height position represented by the toothed groove.

[0016] The beneficial effects of this invention are as follows: This invention uses a motor-driven punching rod to replace manual pressing and cutting, which can not only effectively reduce the burden on the hands, but also the side cutting opening structure design can ensure smooth insertion of cardboard and prevent fingers from accidentally entering, thus eliminating the safety hazards of traditional electric scissors; in addition, by optimizing the diameter ratio of the connecting hole to the rod and the blade area ratio, the connection strength and impact resistance are guaranteed, significantly improving the durability of the cutter. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a specific embodiment.

[0018] Figure 2 This is a structural schematic diagram of a specific embodiment.

[0019] Figure 3 This is a schematic diagram of the internal structure of a specific embodiment.

[0020] Figure 4 This is a structural schematic diagram of a specific embodiment.

[0021] Figure 5 This is a schematic diagram of the assembly of some parts in a specific embodiment one.

[0022] Figure 6 This is a structural schematic diagram of a punching member.

[0023] Figure 7 This is a structural sectional view of a punched bar.

[0024] Figure 8 This is a structural schematic diagram of a specific embodiment two.

[0025] Figure 9 This is a partial cross-sectional view of a specific embodiment two.

[0026] Figure 10 This is a schematic diagram illustrating the use of the adjusting component in a specific embodiment two.

[0027] Reference numerals: 10, housing base; 20, drive motor; 30, punching rod base; 31, side cutting opening; 32, connecting section; 40, punching rod; 41, cutting edge; 42, connecting hole; 50, transmission mechanism; 51, input gear; 52, output gear; 521, cam part; 60, transmission component; 61, hinge ring opening; 70, hinge rod; 80, rotating ring; 90, outer shell; 91, pressure plate; 911, toothed groove; 92, adjusting component; 921, through opening; 922, limiting toothed part. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Specific Implementation Example 1: Combined with Appendix Figure 1 To be continued Figure 4 As shown, a handheld corrugated paper cutter includes a housing base 10, a drive motor 20, a punching rod base 30, and a punching rod 40. The punching rod 40 is movably disposed within the punching rod base 30. The punching rod base 30 is provided with a lateral cutting opening 31. The housing base 10 is provided with a transmission mechanism 50 and a transmission component 60. The transmission mechanism 50 can be a conventional transmission method such as gear transmission, cam transmission, or worm gear transmission.

[0030] The input end of the transmission mechanism 50 is connected to the drive motor 20. The transmission mechanism 50 specifically includes an input gear 51, which is specifically installed on the power output shaft of the drive motor 20. The output end of the transmission mechanism 50 is connected to the transmission component 60, which is connected to the punching rod 40. The drive motor 20 drives the transmission component 60 through the transmission mechanism 50, and the transmission component 60 drives the punching rod 40 to punch the cardboard that extends into the side cutting opening 31.

[0031] This handheld corrugated cardboard cutter has a compact overall structure. The housing 10 serves as both a mounting bracket for the various components and a gripping mechanism, allowing for stable one-handed operation. The drive motor 20 is a small DC motor, with the input gear 51 on its power output shaft acting as the starting point of the entire transmission chain, precisely transmitting the high-speed rotational motion of the motor to the subsequent transmission mechanism 50. The transmission mechanism 50 utilizes multi-stage gear pairs to achieve speed reduction and torque amplification, converting the high-speed, low-torque output of the motor into low-speed, high-torque power. This ensures that the punching rod 40 receives sufficient cutting force to penetrate the fiber structure of the corrugated cardboard.

[0032] The transmission component 60 serves as a crucial intermediate bridge for power transmission. One end of it connects to the output end of the transmission mechanism 50, while the other end links with the punching rod 40, cleverly converting rotary motion into reciprocating linear motion. When the user aligns the edge of the corrugated cardboard and inserts it into the side cutting slot 31, the drive motor 20 is started. The entire transmission chain then drives the punching rod 40 to perform a fast and precise punching action on the cardboard according to the preset motion rhythm.

[0033] Combined with appendix Figure 4 and attached Figure 6 As shown, the width of the lateral cutting opening 31 of the punching rod holder 30 is L1, and the height of the cutting edge 41 of the punching rod 40 is L2, where L2 > L1. This ensures that the effective cutting range of the cutting edge 41 of the punching rod 40 can completely cover the entire opening area of ​​the lateral cutting opening 31 during each reciprocating stroke. When punching cardboard, the cutting edge 41 of the punching rod 40 reciprocates within the lateral cutting opening 31 of the punching rod holder 30.

[0034] For the width of the side cut 31, 2mm ≤ L1 < 15mm, and L1 is preferably 5mm. Setting the width of the side cut 31 within the range of 2mm to 15mm is the optimal range obtained after comprehensively considering operational safety and cutting adaptability.

[0035] If the width of the side cut 31 is too small, most common thicknesses of corrugated cardboard on the market will be difficult to insert smoothly into the cut, and the user will need to repeatedly align and push, which increases the difficulty of operation and the risk of fingers getting close to the cut. If the width of the side cut 31 is too large, the fingers of adults, especially the small fingers of children, may accidentally stick into it, causing serious shearing injuries when the punching action is triggered.

[0036] The L1's preferred width of 5mm perfectly matches the standard thickness of most three-layer and five-layer corrugated cardboard. Users can simply insert the edge of the cardboard gently to feel the perfect guidance, eliminating the need to deliberately adjust the cardboard angle and allowing the operator to visually judge that the cut will not accommodate fingers, thus achieving a balance between safety and ease of use.

[0037] Combined with appendix Figure 3 and attached Figure 5 As shown, one end of the transmission component 60 is provided with a hinged ring opening 61, which is sleeved on the cam portion 521 of the output gear 52 of the transmission mechanism 50. The other end of the transmission component 60 is connected to the punching rod 40, specifically by hinge. A hinged rod 70 is inserted into the other end of the transmission component 60, and the hinged rod 70 is rotatably connected to the connecting hole 42 at the punching rod 40. (See attached diagram) Figure 3 and attached Figure 6 As shown, the diameter of the connecting hole 42 is D3, the diameter of the punching rod 40 is D2, 0.3≤D3 / D2<0.8, and D3 / D2 is preferably 0.5.

[0038] The ratio of the diameter of the connecting hole 42 to the diameter of the punching member 40 is strictly limited to between 0.3 and 0.8. This ratio directly determines the reliability of the connection strength between the hinged rod 70 and the punching member 40.

[0039] If the D3 / D2 ratio is too small, the diameter of the connecting hole 42 will be too small, making it difficult to manufacture. In addition, the hinge rod 70 that matches it will be extremely thin. When subjected to the alternating load brought about by the reciprocating push and pull of the transmission component 60, the hinge rod 70 is very prone to bending deformation or even fatigue fracture. At the same time, the connecting hole 42, which is too small, cannot accommodate a hinge rod 70 of sufficient diameter to transmit the force required for punching.

[0040] If the D3 / D2 ratio is too large, although the diameter of the connecting hole 42 is large enough, the solid wall thickness of the punching member 40 will be greatly weakened, making the material around the connecting hole 42 prone to stress concentration and cracking when the punching member 40 is subjected to lateral force.

[0041] The optimal ratio of D3 / D2 to 0.5 achieves the best balance between the robustness of the hinge rod 70 and the wall thickness strength of the punching member 40. This ensures that the hinge rod 70 has sufficient bending section modulus and that the punching member 40 retains sufficient solid material at the connection hole 42 to bear the punching reaction force, thereby ensuring the durability of the entire punching mechanism under long-term high-frequency operation.

[0042] Combined with appendix Figure 4 and attached Figure 6 As shown, the outer diameter of the punching rod seat 30 is D1, and the diameter of the punching rod 40 is D2, where 1 / 4 ≤ D2 / D1 ≤ 2 / 5, and D2 / D1 is preferably 1 / 3. If the punching rod 40 is too thin, its connecting hole 42 will be too small, making it easy for the connecting hole 42 to fail to connect effectively with the hinge rod 70. When the transmission component 60 drives the punching rod 40 through the hinge rod 70, both the punching rod 40 and the hinge rod 70 are prone to breakage due to their thinness. However, the punching rod 40 cannot be too thick relative to the punching rod seat 30 either; otherwise, the connecting section 32 of the punching rod seat 30 at the lateral cutting opening 31 will be too thin, causing the punching rod seat 30 to easily break at the lateral cutting opening 31.

[0043] Combined with appendix Figure 6 and attached Figure 7 As shown, the cross-sectional area of ​​the punching rod 40 is S1, and the cross-sectional area of ​​the cutting edge 41 of the punching rod 40 is S2. 3 / 10 ≤ S2 / S1 ≤ 7 / 10, and S2 / S1 is preferably 1 / 2. This ensures that the cutting edge 41 has sufficient sharpness to easily cut the layers of paper in the corrugated cardboard, while also maintaining sufficient solid cross-sectional area to resist the impact load during the punching process. Even if the cutting edge wears moderately after long-term use, it can still maintain good cutting performance, greatly extending the service life of the cutting edge.

[0044] Combined with appendix Figure 5 As shown, a rotating ring 80 is provided between the hinge ring opening 61 of the transmission member 60 and the cam portion 521 of the output gear 52. (See attached diagram) Figure 5 As shown, during installation, the rotating ring 80 is first fitted onto the cam portion 521 of the output gear 52, and then the hinge ring portion 61 of the transmission component 60 is fitted onto the rotating ring 80.

[0045] The rotating ring 80 cleverly resolves the sliding friction problem caused by the relative motion between the cam portion 521 of the output gear 52 and the hinge ring portion 61 of the transmission component 60. As an eccentric structure on the output gear 52, the cam portion 521 experiences continuous relative sliding with the inner wall of the hinge ring portion 61 as it rotates with the output gear 52. If these two parts were in direct contact, the increased frictional resistance would reduce transmission efficiency. The outer wall of the rotating ring 80 and the inner wall of the hinge ring portion 61 form a smooth rotating mating surface. In this way, the original surface contact sliding friction between the cam portion 521 and the hinge ring portion 61 is transformed into rolling friction between the cam portion 521 and the rotating ring 80, and between the rotating ring 80 and the hinge ring portion 61. This significantly reduces the coefficient of friction and improves transmission efficiency.

[0046] Meanwhile, the rotating ring 80 also plays the role of uniformly distributing the load, transmitting the push and pull force applied by the cam 521 evenly to the entire inner circumference of the hinge ring opening 61, avoiding damage to the hinge ring opening 61 caused by local stress concentration, thereby extending the service life of the transmission component 60 and the output gear 52.

[0047] Specific Implementation Example 2: Combined with Appendix Figure 8 To be continued Figure 10 As shown, compared with the first embodiment, the second embodiment further includes a housing 90 and a pressure plate 91 for pressing the cardboard during punching. When the punching rod 40 performs a rapid up-and-down punching motion, the cardboard will not shake due to being lifted by the punching rod 40. The housing base 10 is installed inside the housing 90, the punching rod 40 extends outward from the bottom of the housing 90, and the pressure plate 91 is installed at the punching rod base 30.

[0048] Combined with appendix Figure 9 and attached Figure 10 As shown, the outer casing 90 is also equipped with an adjusting member 92, which is used to adjust the height position of the pressure plate member 91. The adjusting member 92 has a through-hole 921, and a limiting tooth 922 is provided at the through-hole 921. The pressure plate member 91 has a plurality of toothed grooves 911, each toothed groove corresponding to a different installation height of the pressure plate member 91. When the limiting tooth 922 of the adjusting member 92 is inserted into the corresponding toothed groove of the pressure plate member 91, the pressure plate member 91 can be fixed at the height position represented by that toothed groove. Specifically, the toothed grooves 911 include primary toothed grooves, secondary toothed grooves, and tertiary toothed grooves, and the height position of the pressure plate member 91 corresponding to the primary toothed grooves to the tertiary toothed grooves gradually decreases.

[0049] Before adjustment, press the adjusting member 92 to disengage the limiting tooth 922 of the adjusting member 92 from the toothed groove of the pressure plate member 91, then vertically adjust the height of the pressure plate member 91, and then proceed as shown in the attached figure. Figure 9As shown, pull out the adjusting member 92 so that the limiting tooth 922 of the adjusting member 92 is inserted into the corresponding tooth groove of the pressure plate member 91.

[0050] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] The above description is not intended to limit the scope of the present invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A handheld corrugated paper cutter, characterized in that: The device includes a housing base (10), a drive motor (20), a punching rod base (30), and a punching rod (40). The punching rod (40) is movably disposed within the punching rod base (30). The punching rod base (30) has a lateral cutting opening (31). The housing base (10) contains a transmission mechanism (50) and a transmission component (60). The input end of the transmission mechanism (50) is connected to the drive motor (20), and the output end of the transmission mechanism (50) is connected to the transmission component (60). The transmission component (60) is connected to the punching rod (40). The drive motor (20) drives the transmission component (60) through the transmission mechanism (50), and the transmission component (60) drives the punching rod (40) to punch the cardboard that extends into the lateral cutting opening (31).

2. The handheld corrugated paper cutter according to claim 1, characterized in that: The width of the lateral cutting opening (31) of the punching rod seat (30) is L1, and the height of the cutting edge (41) of the punching rod (40) is L2, where L2 > L1.

3. A handheld corrugated paper cutter according to claim 2, characterized in that: For the width of the lateral cut (31), 2mm ≤ L1 < 15mm.

4. A handheld corrugated paper cutter according to claim 1, characterized in that: The outer diameter of the punching rod seat (30) is D1, and the diameter of the punching rod (40) is D2, 1 / 4≤ D2 / D1≤2 / 5.

5. A handheld corrugated paper cutter according to claim 1, characterized in that: The cross-sectional area of ​​the punching member (40) is S1, and the cross-sectional area of ​​the cutting edge (41) of the punching member (40) is S2, 3 / 10≤ S2 / S1≤7 / 10.

6. A handheld corrugated paper cutter according to claim 1, characterized in that: One end of the transmission member (60) is provided with a hinge ring opening (61), which is sleeved on the cam part (521) of the output gear (52) of the transmission mechanism (50), and the other end of the transmission member (60) is connected to the punching rod (40).

7. A handheld corrugated paper cutter according to claim 6, characterized in that: A rotating ring (80) is provided between the hinge ring portion (61) of the transmission member (60) and the cam portion (521) of the output gear (52).

8. A handheld corrugated paper cutter according to claim 1, characterized in that: It includes an outer shell (90), a pressure plate (91) for pressing the cardboard during punching, the shell seat (10) is installed inside the outer shell (90), the punching rod (40) extends outward from the bottom of the outer shell (90), and the pressure plate (91) is installed at the punching rod seat (30).

9. A handheld corrugated paper cutter according to claim 8, characterized in that: The outer casing (90) is also equipped with an adjusting member (92), which is used to adjust the height position of the pressure plate member (91).

10. A handheld corrugated paper cutter according to claim 9, characterized in that: The adjusting member (92) is provided with a through-hole (921), and a limiting tooth (922) is provided at the through-hole (921). The pressure plate (91) is provided with a plurality of toothed grooves (911). Each toothed groove corresponds to a different installation height of the pressure plate (91). The limiting tooth (922) of the adjusting member (92) is inserted into the corresponding toothed groove of the pressure plate (91) to fix the pressure plate (91) at the height position represented by the toothed groove.

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