CN114523494B

CN114523494B - Cutting equipment

Info

Publication number: CN114523494B
Application number: CN202210151902.XA
Authority: CN
Inventors: 丁钟; 刘政伟
Original assignee: 3M Speciality Materials Shanghai Co Ltd
Current assignee: 3M Speciality Materials Shanghai Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2024-04-23
Anticipated expiration: 2042-02-18
Also published as: CN114523494A

Abstract

The present invention relates to a cutting apparatus. The cutting apparatus includes a cutting blade, and further includes: a protective cover pivotably mounted on the cutting blade and facing the cutting edge of the cutting blade, the protective cover being pivotable relative to the cutting blade between a first position in which the cutting edge is received within the protective cover and a second position in which the cutting edge is exposed from the protective cover; and an actuation portion operable to pivot the barrier cover from the first position to the second position. The cutting equipment can enable the cutting blade to face back to the cutting position for cutting, and the cutting blade faces the protective cover, so that the cutting blade can be prevented from being carelessly scratched at the cutting position in the cutting process, and the safety worry of operators is reduced or eliminated.

Description

Cutting equipment

Technical Field

The present invention relates to a cutting apparatus, and in particular, to a cutting apparatus for cutting a film of adhesive.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The application of films to the surface of a product (e.g., a roll or a board) is a relatively common process, and for example, a double-sided adhesive film, a protective film, or a decorative film may be applied to the surface of the product. For example, in attaching a double-sided adhesive film to the surface of a roll for adhesion to other articles, after the double-sided adhesive film is wound around the surface of the roll once, the excess double-sided adhesive film needs to be cut off using a cutting device. When cutting off the excess double-sided adhesive film on the surface of the roll, the operator holds the cutting device with the cutting edge generally downward and moves from one end of the roll to the other, for example, from the end farther from the operator to the end closer to the operator. However, this would make the risk of the cutting edge inadvertently scratching the surface of the reel during the cutting process very high. In order to avoid that the cutting edge scratches the surface of the reel, the cutting edge of the cutting device may be directed upwards during the cutting process. However, the cutting edge is directed upward, which may cause an operator or surrounding personnel to be carelessly injured, and the operator may be concerned about safety.

For this reason, improvements are required to the existing cutting apparatus and cutting method to avoid damage to the product during cutting and to improve the safety in use.

Disclosure of Invention

The invention aims to improve cutting safety, avoid damaging products and reduce or eliminate safety concerns of operators.

One aspect of the present invention is to provide a cutting apparatus including a cutting blade, and further including: a protective cover pivotably mounted on the cutting blade and facing the cutting edge of the cutting blade, the protective cover being pivotable relative to the cutting blade between a first position in which the cutting edge is received within the protective cover and a second position in which the cutting edge is exposed from the protective cover; and an actuation portion operable to pivot the barrier cover from the first position to the second position.

The cutting apparatus further includes a biasing member configured to bias the shield cap to the first position.

The guard cover is pivotable against the cutting blade to limit a range of pivoting of the guard cover in a direction toward the second position.

The protective cover comprises a top wall, a first side wall and a second side wall, wherein the first side wall and the second side wall extend from two sides of the top wall respectively. In the first position, the cutting edge is received between the first and second side walls and faces the top wall. The guard cover is pivotable to bring the top wall into abutment with the cutting blade such that the cutting edge is exposed to the top wall in a second position.

In one embodiment, the actuation portion is disposed on the protective cover.

In one embodiment, the cutting apparatus further comprises a flap mounted to the guard cover and the cutting blade, and the biasing member is mounted between the flap and the guard cover.

In one embodiment, the actuation portion is a tab on at least one of the first and second sidewalls of the shield cap. In the first position, the tab projects relative to the back side of the cutting blade.

In one embodiment, the cutting apparatus further comprises a linkage member pivotally mounted on the cutting blade and coupled to the guard cover. The actuation portion is disposed on the linkage member and is operable to pivot the linkage member relative to the cutting blade and to pivot the guard cover to the second position.

The attachment end of the biasing member is coupled to the linkage member and the biasing member is configured to pivot the linkage member and to pivot the shield cover to the first position.

The linkage member is pivotable against the cutting blade or against a protruding mount on the cutting blade to limit the range of pivoting of the guard cover in a direction toward the first position.

In one embodiment, the linkage member includes a top wall, a first side wall, and a second side wall. The first and second side walls of the linkage member extend from opposite sides of the top wall of the linkage member and are mounted to opposite sides of the cutting blade, respectively. Ends of the first and second sidewalls of the link member in the longitudinal direction are coupled to the first and second sidewalls of the barrier cover, respectively. The first and second side walls of one of the linkage member and the shield cover are provided with elongated holes, and the linkage member and the shield cover are coupled to each other by inserting pins into the elongated holes such that ends of the first and second side walls of the linkage member are pivotable and translatable relative to the shield cover.

On the side of the linking member and the barrier cover that faces each other, a top wall of at least one of the linking member and the barrier cover is recessed with respect to the first side wall and the second side wall in the longitudinal direction to form a recessed portion.

In one embodiment, the actuation portion is a tab on at least one of the first and second side walls of the linkage member. In the first position, the tab of the linkage member protrudes relative to the back side of the cutting blade.

In one embodiment, the biasing member is a torsion spring.

The cutting equipment can enable the cutting blade to back to the cutting position for cutting during cutting, so that the cutting blade is prevented from being carelessly scratched at the cutting position in the cutting process, the cutting blade faces the protective cover, and the worry of operators in the aspect of safety can be reduced or eliminated. In addition, the cutting device according to the present invention can expose the cutting edge for cutting by abutment of the actuating portion of the cutting device with the cutting position, so that the use of the cutting device is more convenient.

Drawings

Embodiments of the present invention will be described below, by way of example only, with reference to the accompanying drawings. In the drawings, like features or components are denoted by like reference numerals and the drawings are not necessarily drawn to scale and in which:

fig. 1 and 2 show perspective views of a cutting device according to a first embodiment of the present invention, from different angles, showing a closed state of the cutting device;

Fig. 3 shows an exploded perspective view of the cutting device shown in fig. 1 and 2;

fig. 4 shows another perspective view of the cutting device shown in fig. 1 and 2, showing the open state of the cutting device;

fig. 5 and 6 show perspective views of a cutting device according to a second embodiment of the present invention, from different angles, showing a closed state of the cutting device;

Fig. 7 shows an exploded perspective view of the cutting device shown in fig. 5 and 6; and

Fig. 8 shows another perspective view of the cutting device shown in fig. 5 and 6, showing the open state of the cutting device.

Detailed Description

The following description is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. It should be understood that throughout the drawings, like reference numerals refer to the same or like parts and features. The drawings are merely schematic representations, not necessarily showing the specific dimensions and proportions of the various embodiments of the invention. Specific details or structures may be shown in exaggerated form in particular figures to illustrate related details or structures of embodiments of the invention.

In describing embodiments of the present invention, directional terms used in connection with "upper", "lower", "left", "right", "front", "rear" are described in terms of upper, lower, left, right, front, rear orientations in the drawings.

First, a cutting apparatus 100 according to a first embodiment of the present invention will be described with reference to fig. 1 to 4. Fig. 1 to 4 show perspective views of the cutting apparatus 100, wherein fig. 1 and 2 show perspective views of the cutting apparatus 100 in a closed state, respectively, from different angles, fig. 3 shows an exploded perspective view of the cutting apparatus 100, and fig. 4 shows a perspective view of the cutting apparatus 100 in an open state.

The cutting apparatus 100 includes a cutting blade 10, a protective cover 20, a biasing member, and an actuating portion. As best shown in fig. 3, the cutting end of the cutting blade 10 is provided with a cutting edge 11, and the cutting blade 10 is further provided with a first mounting hole 12 and a second mounting hole 13.

The protective cover 20 includes a top wall 21, a first side wall 22, and a second side wall 23. The first side wall 22 and the second side wall 23 are opposite to each other, extend from both sides of the top wall 21 toward the same direction, and have the same shape. The shield cover 20 has a U-shape when viewed in the longitudinal direction X of the top wall 21. The shape of the first side wall 22 and the second side wall 23 generally corresponds to the shape of the cutting end of the cutting blade 10. In the example shown in fig. 1 to 4, the cutting end of the cutting blade 10 is generally triangular, and thus the first side wall 22 and the second side wall 23 of the protective cover 20 are also generally triangular. The side 221 of the first side wall 22 opposite the top wall 21 is provided with a tab 222. The tab 222 is integrally formed on the first sidewall 22. Alternatively, the tab 222 may be formed separately and mounted to the first sidewall 22. The first side wall 22 is provided with a mounting hole 223 at a position close to the top wall 21, and the lower end portion of the first side wall 22 is provided with a mounting hole 224. Similarly, the side 231 of the second side wall 23 opposite the top wall 21 is provided with a tab 232, the second side wall 23 is provided with a mounting hole 233 near the top wall, as shown in fig. 2, and the lower end of the second side wall 23 is provided with a corresponding mounting hole (not shown in the figure). When the protective cover 20 is mounted to the cutting blade 10, the first side wall 22 and the second side wall 23 are located on opposite sides of the cutting blade 10, respectively, and the top wall 10 faces the cutting edge 11 of the cutting blade 10.

The guard cover 20 is pivotally mounted at the cutting end of the cutting blade 10 and pivots about a first pin 41 relative to the cutting blade 10 between a first position shown in fig. 1 and 2 and a second position shown in fig. 4. In the first position, as shown in fig. 1 and 2, the guard cover 20 overlies the cutting end of the cutting blade 10, and the cutting edge 11 of the cutting blade 10 is received within the guard cover 20 so as not to be visible. In the second position, shown in fig. 4, the guard cover 20 is pivoted over the cutting end of the cutting blade 10, the cutting edge 11 of the cutting blade 10 being exposed from the guard cover 20 for cutting.

The biasing member is configured to bias the shield cap 20 to the first position. In the example shown in fig. 1-4, the biasing member employs a torsion spring 30, the torsion spring 30 being best shown in fig. 3.

When the cutting apparatus 100 is assembled, the first pin 41 sequentially passes through the through hole 421 of the blocking piece 42, the winding portion of the torsion spring 30, the mounting hole 224 of the first side wall 22, the first mounting hole 12 of the cutting blade 10, and the corresponding mounting hole of the second side wall 23, and is engaged with the bolt head 45 of the other side of the cutting blade 10, and the second pin 43 sequentially passes through the through hole 422 of the blocking piece 42, the second mounting hole 13 of the cutting blade 10, and is engaged with the bolt head 47 of the other side of the cutting blade 10. Thus, the shield cover 20 is mounted to the cutting end of the cutting blade 10, and the wound portion of the torsion spring 30 is mounted between the blocking piece 42 and the first side wall 22 of the shield cover 20. The attachment end of the torsion spring 30 is attached to the mounting hole 223 of the first side wall 22 and the free end of the torsion spring 30 rests on the second pin 43, between the catch 42 and the cutting blade 10. The blocking piece 42 may facilitate reliable installation of the torsion spring 30 on the one hand, and may shield a large portion of the torsion spring 30 inside the blocking piece 42 from being exposed on the other hand, thereby facilitating the beauty of the cutting apparatus 100. It should be noted that the blocking piece 42 is not essential. If the end flanges of the first pin 41 and the second pin 43 are large enough, the blocking piece 42 may be removed, and the coiled portion of the torsion spring 30 may be directly installed between the flange of the first pin 41 and the first sidewall 22 of the shield cover 20, and the free end of the torsion spring 30 may be restrained between the flange of the second pin 43 and the cutting blade 10.

In the inactive state of the cutting apparatus 100, the shielding cover 20 is not subjected to an external force, the torsion spring 30 brings the shielding cover 20 to the first position, and the cutting edge 11 is completely accommodated in the shielding cover 20 between the first side wall 22 and the second side wall 23. When the shield cover 20 is pivoted to the second position about the first pin 41 by an external force, the torsion spring 30 is twisted. Upon the removal of the external force that pivots the shield cover 20 toward the second position, the torsion force of the torsion spring 30 will automatically pivot the shield cover 20 about the first pin 41 to return to the first position. Preferably, the torsion force of the torsion spring 30 is designed such that when the shield cover 20 is in the first position, the cutting edge 11 is fully accommodated between the first side wall 22 and the second side wall 23 of the shield cover 20, but the top wall 21 of the shield cover 20 is not in contact with the cutting edge 11, thereby avoiding friction between the top wall 21 and the cutting edge 11.

In the example shown in fig. 1 to 4, the torsion spring 30 and the blocking piece 42 are installed at a side of the first side wall 22 of the barrier cover 20, and the torsion spring 30 is attached to the first side wall 22. Alternatively, the torsion spring 30 and the blocking piece 42 may be installed at a side of the second side wall 23 of the barrier cover 20, and attach the torsion spring 30 to the second side wall 23. In this configuration, the attachment end of the torsion spring 30 is attached to the mounting hole 233 (shown in fig. 2) of the second side wall 23.

The actuation portion is operable to pivot the shield cap 20 to the second position. For example, the actuation portion may pivot the guard cover 20 to the second position by abutment with a cutting position (e.g., a surface of a product) to expose the cutting edge 11 from the guard cover 20 and away from the cutting position for cutting. Preferably, in the first position, the actuating portion is arranged to protrude relative to the blade back side 14 of the cutting blade 10. In the example shown in fig. 1 to 4, the actuating portion is provided on the barrier cover 20. Specifically, the actuation portions are tabs 222 on the first side wall 22 and tabs 232 on the second side wall 23. In the first position shown in fig. 1 and 2, the tab 222 and the tab 232 protrude relative to the back side of the cutting blade 10. This allows the cutting edge to be exposed back to the cutting position by abutment of tab 222 and tab 232 with the cutting position. For example, when cutting excess film on the surface of the product using the cutting apparatus 100, the tabs 222 and 232 are abutted against the surface of the product, a pushing force is applied to the tabs 222 and 232, causing the shield cap 20 to pivot about the pin 41 relative to the cutting blade 10 to a second position, with the cutting edge 11 exposed and facing away from the surface of the product for cutting, as shown in fig. 4. During this process, the torsion spring 30 is twisted.

During cutting, the back side 14 of the cutting blade 10 faces the surface of the product, and the cutting edge 11 cuts against the surface of the product, so that the cutting edge 11 can be prevented from inadvertently scratching the surface of the product during cutting. And in the second position, the longitudinal direction X of the top wall 21 of the protective cover 20 is substantially parallel to the side edges of the cutting blade 10 and still faces the cutting edge 11, as shown in fig. 4. The top wall 21 of the shield cover 20 may serve as a first limit stop preventing the shield cover 20 from over pivoting. Once the guard cover 20 is pivoted in a direction towards the second position (as indicated by arrow K1 in fig. 1) such that the end 211 of the top wall 21 abuts the cutting blade 10, the guard cover 20 is further limited in pivoting, ensuring that the top wall 211 of the guard cover 20 always faces the cutting edge 11. Therefore, even if the cutting blade 11 is directed toward the operator or other position facing away from the cutting position during cutting, the safety cover 20 is always positioned between the cutting blade 11 and the operator facing the cutting blade 11, so that the operator's concern about safety in use can be eliminated or reduced. In the example shown in fig. 1 to 4, in the longitudinal direction X of the protective cover 20, the end 211 of the top wall 21 of the protective cover 20 is flush with the ends of the first side wall 22 and the second side wall 23, as best shown in fig. 4. However, the present invention is not limited thereto. In other examples according to the invention, the top wall 21 of the protective cover 20 may be provided such that the end 211 of the top wall 21 is recessed or protruding relative to the ends of the first and second side walls 22, 23 in the longitudinal direction X of the protective cover 20 as needed to appropriately set the maximum allowable range of pivoting of the protective cover 20 relative to the cutting blade 10 in the direction towards the second position. When the top wall 21 of the shield cover 20 is shortened such that the end 211 of the top wall 21 is recessed with respect to the ends of the first and second side walls 22, 23 in the longitudinal direction X of the shield cover 20, the maximum allowable range of pivoting of the shield cover 20 with respect to the cutting blade 10 in the direction toward the second position can be enlarged. When the top wall 21 of the shield cover 20 is elongated such that the end 211 of the top wall 21 protrudes in the longitudinal direction X of the shield cover 20 with respect to the ends of the first side wall 22 and the second side wall 23, the maximum allowable range of the shield cover 20 pivoting with respect to the cutting blade 10 in the direction toward the second position can be narrowed. For example, an extension length of the top wall 21 of the shield cover 20 in the longitudinal direction X of the shield cover 20 may be shorter than an extension length of at least one of the first side wall 22 and the second side wall 23 in the longitudinal direction X of the shield cover 20, and at least a lower portion of at least one of the first side wall 22 and the second side wall 23 may further extend from the end 211 of the top wall 21 such that the end 211 of the top wall 21 is recessed with respect to the ends of the first side wall 22 and the second side wall 23 in the longitudinal direction X of the shield cover 20.

After the cut is completed, the operator removes the cutting device 100 from the surface of the product and the external forces acting on the tabs 222 and 232 are removed. The torsion force of the torsion spring 30 then automatically pivots the shield cover 20 to the first position to fully house the cutting edge 11 within the shield cover 20.

The cutting apparatus 100 according to the first embodiment of the present invention is described above. In the cutting apparatus 100 according to the first embodiment of the present invention, the actuating portion (i.e., the tab 222 and the tab 223) can be operated to expose the cutting edge from the protective cover and back to the cutting position, and thus, the cutting edge 11 can be cut back to the cutting position in use, so that inadvertent scratching of the cutting edge, for example, scratching of the surface of the product, can be avoided during cutting. And preferably, as shown in fig. 1 and 2, in the first position, the actuating portion projects relative to the back side 14 of the cutting blade 10. This allows the actuation portion to expose the cutting edge by abutting contact with the cutting location (e.g., the surface of the product) without requiring the operator to additionally operate the guard cover 20, and during cutting, only the abutting contact between the actuation portion and the cutting location is required to maintain the guard cover 20 in the second position without requiring the operator to constantly operate the guard cover 20, making the use of the cutting apparatus 100 more convenient. And, once the force acting on the actuating portion is removed, for example, when the operator removes the cutting apparatus 100 from the surface of the product or lays the cutting apparatus 100 flat on the surface of the product after the end of cutting, the torsion spring 30 serving as a biasing member automatically returns the protective cover 20 to the first position to accommodate the cutting edge 11 within the protective cover 20, so that the cutting edge 11 can be completely prevented from inadvertently injuring the operator or other surrounding personnel or objects, and safety concerns of the operator can be eliminated.

A cutting apparatus 100A according to a second embodiment of the present invention will be described with reference to fig. 5 to 8. The cutting apparatus 100A according to the second embodiment of the present invention is substantially identical in structure to the cutting apparatus 100 according to the first embodiment, except for the actuation portion of the cutting apparatus 100A and the arrangement thereof with the protective cover. Only the differences from the cutting apparatus 100 will be described in detail below, and the same parts will not be repeated.

Fig. 5 to 8 show perspective views of a cutting apparatus 100A according to a second embodiment of the present invention, wherein fig. 5 and 6 show perspective views of the cutting apparatus 100A in a closed state, respectively, from different angles, fig. 7 shows an exploded perspective view of the cutting apparatus 100A, and fig. 8 shows a perspective view of the cutting apparatus 100 in an open state. In the drawings, like reference numerals refer to like parts.

The cutting apparatus 100A includes a cutting blade 10A, a protective cover 20A, a biasing member, and an actuating portion, and the cutting apparatus 100A further includes a linkage member 50.

The cutting end of the cutting blade 10A is similar to the cutting end of the cutting blade 10 shown in fig. 1 to 4, is generally triangular, has a cutting edge 11 and a blade back side 14, and is provided with a first mounting hole 12. As shown in fig. 7, the cutting blade 10A is further provided with a second mounting hole 15 and a third mounting hole 16.

Similar to the shield cover 20 shown in fig. 1 to 4, the shield cover 20A includes a top wall 21A, a first side wall 22A, and a second side wall 23A. The lower end portion of the first side wall 22A is provided with a mounting hole 224, and the lower end portion of the second side wall 23A is also provided with a corresponding mounting hole (not shown in the drawings). Unlike the shield cap 20 shown in fig. 1 to 4, the side 221A of the first side wall 22A opposite to the top wall 21A is not provided with a tab, and the lower portion of the first side wall 22A further extends in the longitudinal direction X of the shield cap 20A with respect to the end 211A of the top wall 21A to form a projection 225 such that the top wall 21A is recessed with respect to the projection 225, thereby forming a recess between the end 211A of the top wall 21A and the projection 225, as best shown in fig. 7. In addition, the projection 225 of the first side wall 22A is also provided with an elongated mounting hole 226 for coupling with a linking member 50 to be described below. The second side wall 23A has the same shape as the first side wall 22A, and a description thereof will not be repeated here. The guard cover 20A is pivotally mounted to the cutting blade 10A, being pivotable about a first pin 41 relative to the cutting blade 10A. The top wall 21A may serve as a first stop against the cutting blade 10A, preventing the guard cover 20A from over pivoting, ensuring that the guard cover 20A always faces the cutting edge 11.

As best shown in fig. 7, the linkage member 50 includes a top wall 51, a first side wall 52, and a second side wall 53. The first side wall 52 and the second side wall 53 are opposite to each other, and extend from both sides of the top wall 51 toward the same direction, respectively. The side 521 of the first side wall 52 opposite the top wall 51 is provided with a tab 522. Tab 522 is integrally formed on first sidewall 52. Alternatively, tab 522 may be formed separately and mounted to first sidewall 52. When the linkage member 50 is mounted in place, the cutting blade 10A is positioned between the first and second side walls 52, 53, and preferably, in the first position shown in fig. 5 and 6, the tab 522 protrudes relative to the knife back side 14 of the cutting blade 10A. And the length of the top wall 51 extending in the longitudinal direction Y of the linking member 50 is shorter than the length of the first side wall 52 extending in the longitudinal direction Y of the linking member 50, at the side of the linking member 50 to be coupled to the barrier cover 20A, the lower portion of the first side wall 52 further extends in the longitudinal direction Y of the linking member 50 with respect to the top wall 51 to form the protruding portion 523, and the side end of the top wall 51 in the longitudinal direction Y is recessed with respect to the protruding portion 523 to form a recessed portion between the protruding portion 523 and the top wall 51, thereby avoiding the linking member 50 from interfering with the pivoting of the barrier cover 20A toward the second position. The protruding portion 523 of the first side wall 52 is provided with a mounting hole (not shown) for mounting the pin 61. Alternatively, the protruding portion 523 of the first side wall 52 may not be provided with the mounting hole, but may be provided at an inner wall surface thereof facing the second side wall 53 with a protrusion that may be mounted to the mounting hole 226 of the shield cover 20A, thereby eliminating the use of the pin 61.

In addition, the first side wall 52 is further provided with a mounting hole 524, and a side surface of the first side wall 52 facing the second side wall 53 is further provided with a hanging portion (not shown in the drawings) for coupling a coupling end portion of the torsion spring 30A, which will be described below. The hanging portion protrudes from the inner wall surface of the first side wall 52 so that the hanging portion does not interfere with the cutting blade 10 when mounted in place. For example, the hanging portion protrudes from the inner wall surface of the first side wall 52 by a distance less than half of the interval between the first side wall 52 and the second side wall 53. In the example shown in the drawings, the hanging portion of the first side wall 52 is formed by forming a punching portion 525 on the first side wall 52 to form a bent portion that is bent toward the second side wall 53. However, the present invention is not limited thereto, and in other examples according to the present invention, the hanging portion of the first side wall 52 may be other forms of hanging portions formed on the inner wall of the first side wall 52 as long as the coupling end portion of the torsion spring 30A can be coupled.

The second side wall 53 has substantially the same shape as the first side wall 52. The side 531 of the second side wall 53 opposite the top wall 51 is provided with a tab 532, the lower portion of the second side wall 52 extends further in the longitudinal direction Y of the linking member 50 with respect to the top wall 51 to form a projection 533, and the second side wall 53 is also provided with a corresponding mounting hole. The second side wall 53 does not have the hanging portion described above, or the second side wall 53 may have a similar hanging portion.

The linkage member 50 is pivotably mounted on the cutting blade 10 and coupled to the protective cover 20A. The linkage member 50 is pivotable about the second pin 44 relative to the cutting blade 10 to pivot the guard cover 20A between the first position shown in fig. 5 and 6 and the second position shown in fig. 8. In the first position, the guard cover 20A overlies the cutting end of the cutting blade 10A, and the cutting edge 11 of the cutting blade 10A is received within the guard cover 20A so as not to be visible. In the second position, the guard cover 20A is pivoted over the cutting end of the cutting blade 10A, and the cutting edge 11 of the cutting blade 10A is exposed from the guard cover 20A for cutting.

The biasing member is configured to bias the shield cap 20A to the first position. In the example shown in fig. 5-8, the biasing member employs a torsion spring 30A. The torsion spring 30A is coupled to the linkage member 50, and the torsion force of the torsion spring 30A biases the linkage member 50 to the initial position, thereby biasing the shield cap 20A to the first position.

When the cutting apparatus 100A is assembled, the first pin 41 passes through the mounting hole 224 of the first side wall 22, the first mounting hole 12 of the cutting blade 10A, and the corresponding mounting hole of the second side wall 23 in order, and engages with the bolt head 45 to pivotally mount the protective cover 20A to the cutting blade 10A. The second pin 44 passes through the mounting hole 524 of the first side wall 52 of the linkage member 50, the coiled portion of the torsion spring 30, the second mounting hole 15 of the cutting blade 10A, and the corresponding mounting hole of the second side wall 53 of the linkage member 50 in sequence, and engages the bolt head 46 to pivotally mount the linkage member 50 to the cutting blade 10A. The protruding mount 48 is inserted and fitted into the third mounting hole 16 of the cutting blade 10A. The coupling end of the torsion spring 30A is coupled to the hanging portion of the first side wall 52 of the linkage member 50, and the free end of the torsion spring 30A abuts against the protruding mount 48. The protruding portions 523 and 533 of the link member 50 overlap the protruding portions 225 and 235 of the barrier cover 20A, respectively, such that the mounting holes of the protruding portions 523 and 533 are aligned with the corresponding mounting holes 226 and 235 of the protruding portions 225 and 226, respectively, and then the pins 61 and 62 are inserted into the mounting holes, respectively, to couple the link member 50 and the barrier cover 20A to each other, such that pivoting of the link member 50 can pivot the barrier cover 20A, respectively, and the pins 61 and 62 can move in the elongated mounting holes 226 and 235 of the protruding portions 225, respectively, such that the protruding portions 523 and 533 of the link member 50 can pivot and translate relative to the barrier cover 20A. In the example shown in the drawings, the first side wall 22A and the second side wall 23A of the shield cover 20A are provided with the above-described elongated mounting holes. However, the present invention is not limited thereto, and in other examples according to the present invention, elongated mounting holes may be provided on the protruding portion 523 of the first side wall 52 and the protruding portion 533 of the second side wall 53 of the link member 50.

In the example shown in fig. 5 to 8, the actuating portion is provided on the linking member 50. Specifically, the actuation portions are tabs 522 on the first side wall 52 and tabs 532 on the second side wall 53 of the linkage member 50. When mounted in place in the first position shown in fig. 5 and 6, the cutting edge 11 can be exposed back to the cutting position by abutment of the tabs 522 and 532 with the cutting position, as the tabs 522 and 532 of the linkage member 50 protrude relative to the back side 14 of the cutting blade 10A. For example, when cutting a film on a surface of a product using the cutting apparatus 100A, the tabs 522 and 532 of the linkage member 50 are abutted against the surface of the product, a pushing force is applied to the tabs 522 and 532, causing the linkage member 50 to pivot counterclockwise about the second pin 44, as shown by arrow K2 in fig. 5, and thereby causing the guard cover 20A to pivot to the second position shown in fig. 8, with the cutting edge 11 exposed against the surface of the product for cutting. During this process, torsion spring 30A twists.

During the cutting process, the back side 14 of the cutting blade 10A faces the surface of the product, and the cutting edge 11 cuts away from the surface of the product, so that the surface of the product can be prevented from being scratched by the cutting edge 11. And in the second position, the protective cover 20A always faces the cutting edge 11, which can eliminate or reduce the concern of the operator in terms of safety in use.

After the cut is completed, the operator removes the cutting device 100A from the surface of the product and the external forces acting on tab 522 and tab 532 are removed. Then, the torsion force of the torsion spring 30A automatically pivots the linking member 50 clockwise to the initial position as indicated by an arrow K3 in fig. 8, and thereby pivots the barrier cover 20A to the first position shown in fig. 5 to fully house the cutting edge 11 within the barrier cover 20A. The linkage member 50 may serve as a second limit stop for the cutting apparatus 100A, preventing the linkage member 50 from over-pivoting clockwise, thereby preventing the guard cover 20A from over-pivoting in a direction toward the first position. Upon clockwise pivoting of the linkage member 50 as shown by arrow K3, once the linkage member 50 abuts against the protruding mount 48, or the top wall 51 of the linkage member 50 abuts against the cutting blade 10A, further pivoting of the linkage member 50 in the direction of arrow K3 is restricted, and thereby further pivoting of the guard cover 20A in the direction toward the first position is restricted, thereby avoiding friction of the top wall 21A of the guard cover 20A abutting against the cutting edge 11. In the example shown in fig. 5 to 8, on the side of the linking member 50 facing away from the protective cover 20A in the longitudinal direction Y, the end 511 of the top wall 51 of the linking member 50 in the longitudinal direction Y is flush with the ends of the first side wall 52 and the second side wall 53. However, the present invention is not limited thereto. In other examples according to the present invention, the linking member 50 may be disposed such that a concave portion or convex portion is formed between the end 511 of the linking member 50 and the end of the first side wall 52 and/or the second side wall 53 in the longitudinal direction Y as needed to adjust the range in which the linking member 50 pivots in the clockwise direction and thus the pivot range of the barrier cover 20A.

The cutting apparatus 100A according to the second embodiment of the present invention is described above. The cutting apparatus 100A according to the second embodiment of the present invention can achieve the above-described advantageous technical effects similar to those of the cutting apparatus 100 according to the first embodiment of the present invention. In addition, the cutting apparatus 100A according to the second embodiment of the present invention can also more conveniently and reliably limit the pivoting range of the guard cover 20A, avoiding contact and wear between the guard cover 20A and the cutting edge 11. And in the cutting apparatus 100A according to the second embodiment of the present invention, by providing the actuating portion on the linking member 50 such that the actuating portion is closer to the position where the operator holds the cutting apparatus 100A, interference of the film to be cut in space is reduced, making the operation of the cutting apparatus 100A more convenient.

The above describes a cutting device according to a preferred embodiment of the present invention. In the embodiment shown above, the cutting apparatus 100 and the cutting apparatus 100A are each provided with only one torsion spring as a biasing member. However, the present invention is not limited thereto, and in other embodiments according to the present invention, the biasing member of the cutting device may include two torsion springs, respectively disposed at both sides of the cutting blade, to make the pivoting of the shield cover more stable. For example, in one modified example of the cutting apparatus 100 according to the first embodiment of the present invention, two torsion springs may be provided, one torsion spring coupled to the first side wall 22 of the shielding cover 20 and the other torsion spring coupled to the second side wall 23 of the shielding cover 20. In addition, the biasing member is not limited to the torsion spring, and other suitable members other than the torsion spring may be employed.

In the cutting apparatus 100 according to the first embodiment of the present invention, the tabs serving as the actuating portions are provided on both the first side wall 22 and the second side wall 23 of the shield cover 20. However, the present invention is not limited thereto, and in other examples according to the present invention, a tab serving as an actuating portion may be provided only on one of the first side wall 22 and the second side wall 23 of the shield cover 20. Similarly, in other examples according to the second embodiment of the present invention, a tab serving as an actuation portion may be provided on only one of the first side wall 52 and the second side wall 53 of the linking member 50.

In addition, in the preferred embodiment shown above, in the first position, the actuation portions (tab 222 and tab 232 in the first embodiment, and tab 522 and tab 532 in the second embodiment) are raised relative to the knife back side of the cutting blade. However, the present invention is not limited thereto. In other examples according to the invention, the actuating portion may be provided at other locations, and in use the actuating portion may be pressed to expose the cutting edge 11 of the cutting blade 10. For example, in one modified example according to the first embodiment of the present invention, the tab 222 and the tab 232 may not be provided, and the actuating portion may be provided on the end 211 of the top wall 21 of the shield cover 20 and further extend to protrude with respect to the first side wall 22 and the second side wall 23 in the longitudinal direction X of the shield cover 20. For example, in one modified example according to the second embodiment of the present invention, the tab 522 and the tab 532 may not be provided, and the actuating portion may be provided on one end of the top wall 51 of the linking member 50 toward the barrier cover 20A in the longitudinal direction Y.

In the cutting apparatus 100A according to the second embodiment of the present invention, the above-described linking member 50 is coupled to the shield cover 20A. However, the present invention is not limited thereto, and in other examples according to the present invention, other transmission members, such as a transmission link structure or the like, may be provided between the link member 50A and the shield cover 20A, or other forms of link members may be employed.

Here, exemplary embodiments of the cutting apparatus according to the present invention have been described in detail, but it should be understood that the present invention is not limited to the specific embodiments described and illustrated in detail above. Those skilled in the art will be able to make various modifications and variations to the invention without departing from the spirit and scope of the invention. All such modifications and variations are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent elements.

Claims

1. A cutting apparatus comprising a cutting blade, characterized in that the cutting apparatus further comprises:

A guard cover pivotably mounted on the cutting blade and facing a cutting edge of the cutting blade, the guard cover being pivotable relative to the cutting blade between a first position in which the cutting edge is received within the guard cover and a second position in which the cutting edge is exposed from the guard cover; and

An actuation portion operable to pivot the shield cover from the first position to the second position,

Wherein in the first position, the actuation portion projects relative to a knife back side of the cutting blade such that when the actuation portion abuts a cutting position, the guard cover pivots from the first position to the second position and the cutting edge of the cutting blade is exposed back to the cutting position.

2. The cutting apparatus of claim 1, wherein the cutting apparatus further comprises a biasing member configured to bias the guard cover to the first position.

3. The cutting apparatus of claim 2, wherein the guard cover is pivotable against the cutting blade to limit a range of pivoting of the guard cover in a direction toward the second position.

4. The cutting apparatus of claim 3, wherein the protective cover comprises a top wall, a first side wall and a second side wall, the first side wall and the second side wall extending from two sides of the top wall, respectively,

Wherein in the first position the cutting edge is received between the first and second side walls and faces the top wall, and

Wherein the guard cover is pivotable to bring the top wall into abutment with the cutting blade such that the cutting edge is exposed to the top wall in the second position.

5. The cutting apparatus of claim 4, wherein the actuation portion is disposed on the guard cover.

6. The cutting apparatus of claim 5, further comprising a flap mounted to the guard cover and the cutting blade, and the biasing member is mounted between the flap and the guard cover.

7. The cutting apparatus of claim 5 or 6, wherein the actuation portion is a tab on at least one of the first and second side walls of the guard cover.

8. The cutting apparatus of claim 4, wherein the cutting apparatus further comprises:

a linkage member pivotally mounted on the cutting blade and coupled to the guard cover,

Wherein the actuation portion is disposed on the linkage member and is operable to pivot the linkage member relative to the cutting blade and to bring the guard cover to pivot to the second position.

9. The cutting apparatus of claim 8, wherein the biasing member is coupled to the linkage member and the biasing member is configured to pivot the linkage member and to pivot the guard cover to the first position.

10. The cutting apparatus of claim 8, wherein the linkage member is pivotable against the cutting blade or against a protruding mount on the cutting blade to limit a range of pivoting of the guard cover in a direction toward the first position.

11. The cutting apparatus according to any one of claims 8-10, wherein the linkage member includes a top wall, a first side wall, and a second side wall, the first and second side walls of the linkage member extending from two sides of the top wall of the linkage member and being mounted on opposite sides of the cutting blade, respectively;

Wherein ends of the first and second side walls of the linking member in a longitudinal direction are coupled to the first and second side walls of the barrier cover, respectively; and

Wherein the first and second side walls of one of the linkage member and the protective cover are provided with elongated holes, the linkage member and the protective cover being coupled to each other by inserting pins into the elongated holes such that the ends of the first and second side walls of the linkage member are pivotable and translatable relative to the protective cover.

12. The cutting apparatus of claim 11, wherein, on a side of the linkage member and the guard cover facing each other, a top wall of at least one of the linkage member and the guard cover is recessed relative to the first and second side walls in a longitudinal direction to form a recess.

13. The cutting apparatus of claim 11, wherein the actuation portion is a tab on at least one of the first and second side walls of the linkage member.

14. The cutting apparatus of claim 2, wherein the biasing member is a torsion spring.