Cutting knife

Abstract

The utility model relates to a cutting knife. The cutting knife comprises a fixed handle, a supporting part, a supporting part and a quick-adjusting toggle button. Wherein the supporting part is mounted on the fixed handle. The supporting part is rotationally connected to the fixed handle around the rotating shaft and used for defining a knife edge with the supporting part, and the knife edge is used for containing an object to be cut. The quick-adjusting toggle button is connected to the cutting part and used for driving the cutting part to rotate around the rotating shaft so as to adjust the opening degree of the knife edge. According to the cutting knife, the caliber of the knife edge can be rapidly adjusted, operation is convenient, and labor is saved.

Description

Technical Field

[0001] The present application relates to the technical field of cutting tools, and in particular to a cutting knife. Background Art

[0002] A cutting knife is a commonly used cutting tool, and its main purpose is to cut pipes into sections. The cutting knife usually includes a fixed handle, a movable handle, a support portion, and a cutting portion. A blade is formed between the cutting portion and the support portion to place the pipe to be cut, and the movable handle is used to push the cutting portion to press and cut the pipe. Since the pipe diameters of different pipes are different, after the pipe is placed on the blade, the position of the cutting portion needs to be adjusted according to the size of the different pipes, so that the blade diameter matches the pipe diameter of the pipe. Usually, the operator needs to pinch the edge of the cutting portion to adjust the position of the cutting portion, which is inconvenient, laborious, and has low adjustment efficiency. Utility Model Content

[0003] Based on this, it is necessary to provide a cutting knife that can quickly adjust the blade diameter and is easy to operate and labor-saving.

[0004] A cutting knife, comprising a fixed handle, a support part, a support part and a quick adjustment dial. The support part is mounted on the fixed handle. The support part rotates around a rotating shaft and is connected to the fixed handle, and is used to form a blade between the support part and the support part, and the blade is used to place an object to be cut. The quick adjustment dial is connected to the cutting part and is used to drive the cutting part to rotate around the rotating shaft to adjust the opening of the blade.

[0005] In one of the embodiments, a guide hole is formed in the fixed handle, the quick-adjust dial button is passed through the guide hole, and is slidably engaged in the guide hole along the extension direction of the guide hole.

[0006] In one embodiment, the cutting knife also includes a first elastic member, which connects the fixed handle and the cutting part, and as the cutting part rotates around the rotating shaft under the action of external force, the first elastic member undergoes elastic deformation to accumulate elastic potential energy, which is used to restore to a natural state after the external force is removed, thereby driving the cutting part to return to its initial state without force.

[0007] In one embodiment, the first elastic member is configured as a tension spring, one end of the tension spring is connected to the fixed handle, and the other end is connected to the cutting portion, and when the tension spring is in a natural state, the opening of the blade is the largest.

[0008] In one embodiment, the first elastic member is configured as a torsion spring, which is sleeved on the rotating shaft, one leg of the torsion spring is connected to the fixed handle, and the other leg is connected to the cutting part, and when the torsion spring is in a natural state, the blade is closed.

[0009] In one embodiment, the support portion includes a plurality of support blocks, which are arranged to surround an opening of the support portion toward the cutting portion, and the relative positions of the plurality of support blocks are configured to be adjustable so that the size of the opening can be adjusted.

[0010] In one embodiment, the support portion further includes a second elastic member, and two support blocks located at both ends are rotatably connected to the fixed handle respectively, and two adjacent support blocks are connected via the second elastic member.

[0011] In one embodiment, the support block has a fitting surface, which is configured as an arc surface and is used to fit the object to be cut.

[0012] In one embodiment, it also includes a movable handle and a propulsion part, the movable handle is hingedly connected to the fixed handle, the propulsion part is installed on the movable handle and is provided with a pawl, the pawl is provided with pawl teeth, the cutting part includes a toothed disk, the toothed disk has a plurality of matching teeth, and the ratchet teeth are meshed with the matching teeth.

[0013] In one embodiment, the pawl has at least two pawl teeth.

[0014] Compared with the prior art, the cutting knife provided in the present application, after the pipe is placed on the support part, the user can drive the cutting part to rotate around the rotating axis by turning the quick-adjust dial button, so as to quickly adjust the size of the blade opening to match the size of the pipe. By holding the quick-adjust dial button, the operation is convenient and more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the cutting blade of the first embodiment provided in the present application in an open state;

[0017] Figure 2 A schematic diagram of a cutting blade of a cutting knife in the process of closing a cutting blade according to the first embodiment of the present application;

[0018] Figure 3 for Figure 1 An exploded view of the cutter shown;

[0019] Figure 4 for Figure 1 A partial schematic diagram of the cutting knife shown;

[0020] Figure 5 A schematic diagram of the structure of the cutting part provided in this application;

[0021] Figure 6 for Figure 5 An exploded view of the cut section shown;

[0022] Figure 7 A front view of a cutting knife in a closed state of a second embodiment of the present invention is provided;

[0023] Figure 8 A schematic diagram of the cutting blade of the second embodiment provided in the present application during the opening process;

[0024] Fig. 9 for Figure 7 A partial rear view of the cutting knife;

[0025] Fig.10 An exploded schematic diagram of the support portion provided for this application.

[0026] Reference numerals: 100, cutting knife; 10, fixing handle; 11, guide hole; 12, first support plate; 13, second support plate; 14, first limiting column; 20, supporting portion; 21, supporting block; 211, accommodating cavity; 212, fitting surface; 22, opening; 23, second elastic member; 30, cutting portion; 31, rotating shaft; 32, blade; 33, toothed disc; 331, limiting protrusion; 332, avoidance gap; 33 3. Mating teeth; 34. Second limiting column; 35. Limiting protrusion; 36. Blade; 361. First notch; 362. Second notch; 37. First pressure plate; 38. Second pressure plate; 39. Quick release structure; 40. Quick adjustment dial button; 41. Anti-slip convex pattern; 50. Movable handle; 60. First elastic member; 61. Tension spring; 62. Torsion spring; 621. Support foot; 70. Propulsion unit; 71. Ratchet; 711. Ratchet tooth. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0032] See also Figures 1 to 4 The present application provides a cutting knife 100, Figure 1 A schematic diagram of the cutting blade of the first embodiment provided in the present application in an open state; Figure 2 A schematic diagram of a cutting blade of a cutting knife in the process of closing a cutting blade according to the first embodiment of the present application; Figure 3 for Figure 1 An exploded view of the cutter shown; Figure 4 for Figure 1 A partial schematic diagram of the cutting knife shown.

[0033] The cutting knife 100 includes a fixed handle 10, a support part 20, a cutting part 30 and a quick adjustment dial 40. The support part 20 is mounted on the fixed handle 10. The cutting part 30 is connected to the fixed handle 10 by rotating around a rotating shaft 31, and is used to form a blade 32 between the cutting part 30 and the support part 20, and the blade 32 is used to place the object to be cut. The quick adjustment dial 40 is connected to the cutting part 30, and is used to drive the cutting part 30 to rotate around the rotating shaft 31 to adjust the opening of the blade 32. The object to be cut is not limited to the pipe fitting. The structure and working process of the cutting knife are introduced below with the pipe fitting as the object to be cut. In this way, after the pipe fitting is placed on the support part 20, the user can drive the cutting part 30 to rotate around the rotating shaft 31 by toggling the quick adjustment dial 40, so as to quickly adjust the opening size of the blade 32 to match the size of the pipe fitting, which is convenient to operate, more labor-saving and safer.

[0034] Furthermore, the outer surface of the quick-adjust dial button 40 is provided with anti-skid convex patterns 41 to increase the friction coefficient of the surface of the quick-adjust dial button, thereby facilitating the movement of the quick-adjust dial button 40 .

[0035] The fixed handle 10 is provided with a guide hole 11, and the quick adjustment dial button 40 is inserted into the guide hole 11 and is slidably clamped in the guide hole 11 along the extension direction of the guide hole 11. The guide hole 11 is used to limit the moving track of the quick adjustment dial button 40, so that the quick adjustment dial button 40 can more smoothly drive the cutting part 30 to rotate around the rotating shaft 31 to adjust the opening size of the blade 32. Specifically, the guide hole 11 extends in an arc shape with the rotating shaft 31 as the center.

[0036] Optionally, scale lines are provided on the surface of the fixed handle 10 , and the scale lines are arranged along the extending direction of the guide hole 11 to display the rotation angle of the quick adjustment dial 40 around the rotating shaft 31 .

[0037] For example, in one embodiment, see Figure 3 The fixed handle 10 includes a first support plate 12 and a second support plate 13 arranged at intervals, a cutting portion 30 is located between the first support plate 12 and the second support plate 13, and a rotating shaft 31 passes through the first support plate 12, the cutting portion 30 and the second support plate 13 in sequence. A guide hole 11 is opened in the first support plate 12.

[0038] See also Figure 5 and Figure 6 The structure of the cutting part 30 is described below. Figure 5 A schematic diagram of the structure of the cutting part provided in this application; Figure 6 for Figure 5 Exploded view of the cut section shown.

[0039] Exemplarily, the cutting part 30 includes a blade 36, a toothed disc 33, a first pressing plate 37 and a second pressing plate 38. The blade 36 and the toothed disc 33 abut against each other, and the first pressing plate 37 is used to cooperate with the second pressing plate 38 to clamp the blade 36 and the toothed disc 33.

[0040] Furthermore, two limiting protrusions 331 are provided on the toothed disc 33, and a first notch 361 and a second notch 362 are provided on the blade 36. The first notch 361 is used to engage with one of the limiting protrusions 331 in the first direction X, and the second notch 362 is used to engage with the other limiting protrusion 331 in the second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other on the plane formed by the toothed disc 33 and the blade 36. In this way, the toothed disc 33 and the blade 36 are mutually limited in two directions on their own planes, and the first pressing plate 37 and the second pressing plate 38 cooperate to clamp the toothed disc 33 and the blade 36 in a direction perpendicular to the toothed disc 33, so that the toothed disc 33 and the blade 36 can be firmly connected together.

[0041] Furthermore, one of the limiting protrusions 331 is configured as a quick-release structure 39, one end of the quick-release structure 39 is connected to the toothed disc 33, and the other end is elastically clamped in the first notch 361, and the toothed disc 33 is provided with an avoidance notch 332 corresponding to the first notch 361. Under the action of external force, the quick-release structure 39 can be accommodated in the avoidance notch 332 and detached from the first notch 361, thereby releasing the connection between the blade 36 and the toothed disc 33. In this way, the blade 36 can be quickly replaced.

[0042] The cutting knife 100 also includes a first elastic member 60, which connects the fixed handle 10 and the cutting part 30, and as the cutting part 30 rotates around the rotating shaft 31 under the action of external force, the first elastic member 60 undergoes elastic deformation to accumulate elastic potential energy, which is used to restore to a natural state after the external force is removed, so as to drive the cutting part to return to an initial state without force. In this way, the cutting part 30 can only rotate around the rotating shaft 31 when it is subjected to external force, thereby preventing the cutting part 30 from rotating on its own and changing the opening size of the blade 32. Moreover, after the external force is removed, the first elastic member 60 returns to a natural state, thereby being able to drive the cutting part 30 to return to an initial state without rotation, thereby facilitating the next cutting operation.

[0043] The first elastic member can be configured in the following two ways.

[0044] Embodiment 1:

[0045] See also Figures 1 to 4The first elastic member is configured as a tension spring 61, one end of the tension spring 61 is connected to the fixed handle 10, and the other end is connected to the cutting part 30, and when the tension spring 61 is in a natural state, the opening of the blade 32 is the largest. That is, the blade 32 is in a normally open state. When the user turns the quick-adjustment dial 40 to rotate around the rotation axis 31 toward the support part 20, the tension spring 61 is stretched to accumulate elastic potential energy. When the force applied by the user to the quick-adjustment dial 40 disappears, the tension spring 61 rebounds to drive the quick-adjustment dial 40 and the cutting part 30 to rotate in the opposite direction and return to the initial state where the blade 32 is fully opened.

[0046] Furthermore, the tension spring 61 is disposed between the first support plate 12 and the second support plate 13 .

[0047] Embodiment 2:

[0048] See also Figures 7 to 9 ,in, Figure 7 A front view of a cutting knife in a closed state of a second embodiment of the present invention is provided; Figure 8 A schematic diagram of the cutting blade of the second embodiment provided in the present application during the opening process; Fig. 9 for Figure 7 A partial rear view of the cutting knife.

[0049] The first elastic member is configured as a torsion spring 62, which is sleeved on the rotating shaft 31, one leg 621 of the torsion spring 62 is connected to the fixed handle 10, and the other leg 621 is connected to the cutting part 30, and when the torsion spring 62 is in a natural state, the blade 32 is closed. That is, the blade 32 is in a normally closed state. When the user turns the quick-adjust dial 40 to rotate around the rotating shaft 31 away from the support part 20, the torsion spring 62 is stressed and the two legs 621 approach each other to accumulate elastic potential energy. When the force applied by the user to the quick-adjust dial 40 disappears, the two legs 621 of the torsion spring 62 rebound in directions away from each other, and drive the quick-adjust dial 40 and the cutting part 30 to rotate in the opposite direction and return to the initial state where the blade is completely closed.

[0050] In this way, the blade 32 is normally closed, making the cutter safer to use. Moreover, after the pipe is placed on the support part 20, the cutting part 30 can apply a force toward the support part 20 to the pipe under the elastic action of the torsion spring 62, thereby automatically clamping the pipe, that is, achieving quick clamping.

[0051] Optionally, the fixed handle 10 is provided with a first limiting column 14, the cutting part 30 is provided with a second limiting column 34 and a limiting protrusion 35, one leg 621 of the torsion spring 62 hooks the first limiting column 14, the other leg 621 hooks the second limiting column 34, and the end rests on the limiting protrusion 35, wherein the limiting protrusion 35 is used to support the leg 621 on the cutting part 30 when the cutting part 30 rotates around the rotating shaft 31, thereby preventing the cutting part 30 from swinging.

[0052] The limiting protrusion 35 is detachably mounted on the cutting portion 30 .

[0053] The support portion 20 is described below. Figure 3 and Fig.10 , Fig.10 An exploded schematic diagram of the support portion provided for this application.

[0054] The support portion 20 includes a plurality of support blocks 21, and the plurality of support blocks 21 are arranged to surround an opening 22 of the support portion 20 toward the cutting portion 30, and the relative positions of the plurality of support blocks 21 are configured to be adjustable so that the size of the opening 22 can be adjusted. In this way, the shape and size of the opening 22 can be adjusted by adjusting the relative positions of the plurality of support blocks 21, so that the support portion 20 can adapt to pipes of different sizes.

[0055] Optionally, in one embodiment, the support portion 20 further includes a second elastic member 23, and the two support blocks 21 at both ends are respectively rotatably connected to the fixed handle 10, and the two adjacent support blocks 21 are connected by the second elastic member 23; as the support block 21 is subjected to an external force in the direction away from the opening 22, the two support blocks 21 at both ends rotate in the direction away from the opening 22, and the spacing between the adjacent support blocks 21 increases, and the second elastic member 23 is stretched to accumulate elastic potential energy, which is used to restore to a natural state after the external force is removed, so as to drive the support block 21 to return to an initial state without force. In this way, the pipe is placed at the support portion 20, and the support portion 20 is stretched to adapt to the outer ring shape of the pipe. After the pipe is removed, the second elastic member 23 rebounds, and the support portion 20 returns to its original state, which is convenient for the next cutting operation. In addition, by setting the two support blocks 21 at both ends to be rotatably connected to the fixed handle 10, the two support blocks 21 at both ends can freely adjust the angle, so as to better fit the surface of the pipe. Among them, the second elastic member 23 can be configured as a tension spring or a rubber band.

[0056] For example, see Figure 3 There are two support parts 20, and the two support parts 20 are respectively installed on the sides of the first support plate 12 and the second support plate 13 that are away from each other. Each support part 20 includes two support blocks 21, and the two support blocks 21 are fan-shaped with gradually changing curvatures, and the two support blocks 21 enclose a semicircular structure.

[0057] In other embodiments, the plurality of support blocks 21 may be slidably connected to the fixed handle 10 respectively, so as to adjust the relative position relationship between the plurality of support blocks 21 .

[0058] like Fig.10As shown, the support block 21 has a receiving cavity 211, and the second elastic member 23 is received in the receiving cavity 211. Thus, when the support portion 20 is in a natural state without being subjected to force, the second elastic member 23 is hidden in the receiving cavity 211 and will not be exposed, thus saving space.

[0059] The support block 21 has a fitting surface 212, which is configured as an arc surface and is used to fit the pipe. In this way, the support block 21 forms a surface contact with the pipe, that is, the contact area between the support block 21 and the pipe is increased, which is conducive to improving the supporting force of the support part 20 on the pipe during the cutting process, and making the cut surface of the pipe smoother.

[0060] See also Figure 4 The cutting knife 100 further includes a movable handle 50 and a propulsion unit 70. The movable handle 50 is hingedly connected to the fixed handle 10. The propulsion unit 70 is mounted on the movable handle 50 and is provided with a ratchet 71. The ratchet 71 has ratchet teeth 711. The cutting unit 30 includes a toothed disc 33. The toothed disc 33 has a plurality of mating teeth 333. The ratchet teeth 711 mesh with the mating teeth 333. As the movable handle 50 rotates relative to the fixed handle 10, the propulsion unit 70 can push the cutting unit 30 toward the direction close to the support unit 20 to press and cut the pipe fitting through the meshing action of the ratchet teeth 711 and the mating teeth 333. Optionally, the number of ratchet 71 is configured to be two, one of which is used to propel the toothed disc 33 to rotate, and the other is used to prevent the toothed disc 33 from rotating. This part is a conventional technology in the art and will not be repeated here.

[0061] Furthermore, the pawl 71 has at least two pawl teeth 711 , so that at least two pawl teeth 711 simultaneously push the matching teeth 333 , thereby increasing the torque and making the cutter operation more labor-saving and more stable.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A cutting knife, characterized in that: include: Fixed handle; A support portion, mounted on the fixed handle; The cutting part is connected to the fixed handle by rotating around the rotating shaft and is used to form a cutting edge with the supporting part, and the cutting edge is used to place the object to be cut; The quick-adjust dial button is connected to the cutting part and is used to drive the cutting part to rotate around the rotating shaft to adjust the opening of the blade.

2. The cutting knife according to claim 1, characterized in that: The fixed handle is provided with a guide hole, the quick-adjust dial button is passed through the guide hole, and is slidably clamped in the guide hole along the extending direction of the guide hole.

3. The cutting knife according to claim 1, characterized in that: The cutting knife also includes a first elastic member, which connects the fixed handle and the cutting part, and as the cutting part rotates around the rotating shaft under the action of external force, the first elastic member undergoes elastic deformation to accumulate elastic potential energy, which is used to restore to a natural state after the external force is removed, so as to drive the cutting part to return to an initial state without force.

4. The cutting knife according to claim 3, characterized in that: The first elastic member is configured as a tension spring, one end of the tension spring is connected to the fixed handle, and the other end is connected to the cutting portion, and when the tension spring is in a natural state, the opening of the blade is the largest.

5. The cutting knife according to claim 3, characterized in that: The first elastic member is configured as a torsion spring, which is sleeved on the rotating shaft, one leg of the torsion spring is connected to the fixed handle, and the other leg is connected to the cutting part, and when the torsion spring is in a natural state, the blade is closed.

6. The cutting knife according to claim 1, characterized in that: The support portion comprises a plurality of support blocks, the plurality of support blocks are arranged to surround an opening (22) of the support portion disposed toward the cutting portion, and the relative positions between the plurality of support blocks are configured to be adjustable so that the size of the opening (22) is adjustable.

7. The cutting knife according to claim 6, characterized in that: The support portion further includes a second elastic member. Two support blocks located at both ends are rotatably connected to the fixed handle respectively, and two adjacent support blocks are connected via the second elastic member.

8. The cutting knife according to claim 6, characterized in that: The support block has a fitting surface, which is configured as an arc surface and is used to fit the object to be cut.

9. The cutting knife according to claim 1, characterized in that: It also includes a movable handle and a propulsion part, wherein the movable handle is hingedly connected to the fixed handle, the propulsion part is installed on the movable handle and is provided with a pawl, the pawl is provided with pawl teeth, the cutting part includes a toothed disk, the toothed disk has a plurality of matching teeth, and the ratchet teeth are meshed with the matching teeth.

10. The cutting knife according to claim 9, characterized in that: The pawl has at least two pawl teeth.

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