Cutter

Abstract

The cutter comprises a blade and a cutter handle, the cutter handle is connected to the blade, the blade comprises a body part and a connecting part, the body part comprises a first end and a second end which are located at the two ends in the first direction respectively, and the second end is connected with the cutter handle through the connecting part; wherein the second end comprises a concave part, and the concave part is sunken towards the direction where the first end is located; the connecting part comprises a transition face which is smoothly connected with the concave part and the knife handle, and the thickness of the transition face in the thickness direction of the blade is larger than that of the body part. According to the cutter provided by the invention, the fingers are closer to the chopping force application position of the cutting edge in the state of stretching into the concave part, the force arm formed between the fingers and the chopping force application position of the cutting edge is smaller, more labor is saved in the cutting machining process of the cutter, and the thickness of the transition surface in the thickness direction of the blade is larger than that of the body part; the strength of the connecting part is improved, the connection with the knife handle is firmer, the sharpness of the lower end position of the connecting part is weakened, and fingers are more comfortable and do not cut hands when clinging to the knife handle.

Description

Technical Field

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

[0002] Knives are essential tools in daily family life, and they often need to be equipped with multiple knives, such as fruit knives and kitchen knives. Knives usually include blades and handles. As the most representative product among kitchen tools, the comfort of using knives directly affects the user experience. Whether it is cutting, slicing, chopping, or beating, you can't do without a handy and easy-to-use knife, so it is very necessary to study the ergonomics of knives. At present, the knives on the market generally have the following problems: 1. The knives are easy to slip out of your hands when you use too much force during use; 2. The knives are more laborious to use; 3. There are many sharp positions on the non-cutting part of the blade, which leads to a higher risk factor when using the knives; 4. The operating comfort of the knife when holding and processing ingredients is not high. Therefore, it is urgent to develop a knife structure that is comfortable to hold, not easy to slip, labor-saving, and safe. Utility Model Content

[0003] The present application provides a cutting tool to improve or solve at least one of the above technical problems to a certain extent.

[0004] The technical solution adopted in this application is:

[0005] A tool comprises a blade and a handle, wherein the handle is connected to the blade, and is characterized in that the blade comprises a main body and a connecting portion, the main body comprising a first end and a second end respectively located at two ends of a first direction, and the second end is connected to the handle via the connecting portion; wherein the second end comprises a recessed portion, and the recessed portion is recessed toward the direction where the first end is located; the connecting portion comprises a transition surface, the transition surface smoothly connects the recessed portion and the surface of the handle, and the thickness of the transition surface along the thickness direction of the blade is greater than the thickness of the main body.

[0006] The tool in this application also has the following additional technical features:

[0007] In the projection of the transition surface on the normal surface in the first direction, the thickness of the transition surface along the thickness direction of the blade is L, and L gradually decreases in the direction from the side of the transition surface connected to the handle to the side of the transition surface connected to the recess.

[0008] In the projection of the tool on the normal surface in the first direction, the maximum distance between the contour line of the recess and the contour line of the handle along the second direction is H1, H1≥35mm; wherein the first direction, the thickness direction of the blade and the second direction are perpendicular to each other.

[0009] The projection of the recess on the normal surface in the thickness direction of the blade is an arc, and the radius of curvature of each part of the arc is R, 12mm≤R≤25mm.

[0010] The transition surface is constructed as a concave arc surface, and two ends of the transition surface smoothly transition to the tool handle and the concave portion respectively.

[0011] The main body portion includes a first side surface and a second side surface, and the first side surface and the second side surface are arranged opposite to each other along the thickness direction of the blade; the connecting portion includes: a first inclined surface smoothly connecting the first side surface and the handle; a second inclined surface smoothly connecting the second side surface and the handle; wherein the first inclined surface and the second inclined surface are symmetrical, and the axis of symmetry is parallel to the first direction; the extension length of the portion of the connecting portion provided with the first inclined surface and the second inclined surface along the first direction is H2, and the maximum thickness of the portion of the connecting portion provided with the first inclined surface and the second inclined surface along the thickness direction of the blade is δ, and H2 / δ≥4 / 5.

[0012] The first inclined surface and the second inclined surface are concave.

[0013] The main body includes a third end and a fourth end respectively located at the two ends of the second direction, the third end is provided with a blade, and the fourth end is a blade back; wherein the second end and the third end are connected via a first rounded corner; and / or the first end and the fourth end are connected via a second rounded corner.

[0014] A buffer section is provided between the first fillet and the blade, and a thickness of the buffer section along the thickness direction is greater than a thickness of the blade along the thickness direction.

[0015] The connecting portion includes a pressing surface connected to the fourth end, and a surface of the pressing surface is provided with a plurality of anti-slip grooves.

[0016] Due to the adoption of the above technical solution, the technical effects achieved by this application are:

[0017] 1. The knife provided in the present application is based on the user's habit of having one finger against the root end of the blade to facilitate force application in the conventional holding posture of the knife handle (such as the pinching holding posture or the mallet holding posture) during cutting. Therefore, the present solution enables the second end of the main body of the blade to include a recessed portion, which is recessed in the direction of the first end, so that when the user holds the knife handle, the finger can be against the second end of the main body in the recessed portion. Since the chopping force application position of the blade during cutting is mostly the middle area of ​​the blade, and the recessed portion has a recessed amount toward the first end, the finger is closer to the chopping force application position of the blade in the recessed state, and the force arm formed between the finger and the chopping force application position of the blade is smaller. Therefore, the cutting process will be more labor-saving. In addition, the connecting portion connects the main body with the handle, and the transition surface of the connecting portion smoothly connects the recess and the handle, so that there is no discomfort when the fingers are inserted into the recess and abut against the end surface of the recess and the transition surface. Moreover, the thickness of the transition surface along the thickness direction of the blade is greater than the thickness of the main body, which improves the strength of the connecting portion and makes the connection with the handle more solid. At the same time, the sharpness of the lower end of the connecting portion is weakened, so that the fingers are more comfortable and will not cut their hands when abutting against the recess.

[0018] 2. As a preferred embodiment of the present application, the side of the transition surface connected to the handle points in the direction of the side of the transition surface connected to the recess, and the thickness of the transition surface gradually decreases along the thickness direction of the blade. This thickness gradient makes the transition of the transition surface smooth on the one hand, and does not affect the comfort when gripping on the other hand.

[0019] 3. As a preferred embodiment of the present application, along the second direction, the maximum distance H1 between the recess and the handle is ≥35 mm. This size range takes into account the size of an adult's palm and fingers, ensuring that the fingers can be inserted into the recess in the gripping state, and that the fingers fit in place with the transition surface in a comfortable gripping action, to avoid H1 being too small, resulting in the fingers only being able to rest against the thinner area on the lower side of the recess and causing a rough feel.

[0020] 4. As a preferred embodiment of the present application, the projection of the recess along the thickness direction of the blade is an arc, and the radius of curvature of each part of the arc is R, 12mm≤R≤25mm. This size limitation ensures that the fingers of most users can be inserted into the recess when holding the handle. At the same time, it also reasonably limits the amount of recess toward the first end of the main body to avoid the situation where the recess is too small, resulting in an unobvious labor-saving effect, or the recess is too large, affecting the comfort of holding and applying force.

[0021] 5. As a preferred embodiment of the present application, the transition surface is constructed as an arc-shaped surface that is concave toward the back of the knife, so that the transition surface better fits the curvature of the finger, and the two ends of the transition surface smoothly transition to the handle and the recess respectively, so that the fingers feel no discomfort when they abut the transition surface and slide along the transition surface and the end surface of the recess due to the application of force, thereby improving the operating comfort.

[0022] 6. As a preferred embodiment of the present application, the first bevel smoothly connects the first side surface and the handle, and the second bevel smoothly connects the second side surface and the handle. For the pinching grip posture, the thumb and index finger contact the first bevel and the second bevel respectively. Therefore, the smoothly transitioned bevel structure helps to improve the grip and operation comfort of the thumb and index finger. By making H2 / δ≥4 / 5, the thickness of the first bevel and the second bevel along the thickness direction of the blade is limited to a reasonable range, effectively preventing the first bevel and the second bevel from being too steep, causing a huge thickness difference from the handle to the blade, and causing discomfort in gripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 An axonometric view of a tool provided in an embodiment of the present application;

[0025] Figure 2 The main view of the tool provided in the embodiment of the present application Figure 1 ;

[0026] Figure 3 The main view of the tool provided in the embodiment of the present application Figure 2 ;

[0027] Figure 4 A top view of a tool provided in an embodiment of the present application;

[0028] Figure 5 An axonometric view of a blade provided in an embodiment of the present application;

[0029] Figure 6 A side view of the second end of the blade provided by the embodiment of the present application;

[0030] List of parts and reference numerals:

[0031] 1 blade, 11 body, 111 first end, 112 second end, 1121 recess, 113 first side surface, 114 third end, 1141 blade, 115 fourth end, 116 first fillet, 117 second fillet, 118 buffer section, 12 connecting portion, 121 transition surface, 122 first inclined surface, 123 pressing surface, 124 anti-slip groove;

[0032] 2 knife handles. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0035] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "lateral", "longitudinal", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0038] In the embodiment of the present application, a cutting tool is provided. For the convenience of explanation and understanding, the following contents provided in the present application are all described based on the illustrated product structure. Of course, those skilled in the art can understand that the above structure is only used as a specific example and schematic description, and cannot constitute a specific limitation on the technical solution provided in the present application.

[0039] Reference Figures 1 to 6As shown, a tool provided in the present application includes a blade 1 and a handle 2, wherein the handle 2 is connected to the blade 1, and the blade 1 includes a main body 11 and a connecting portion 12, wherein the main body 11 includes a first end 111 and a second end 112 respectively located at two ends of a first direction, and the second end 112 is connected to the handle 2 through the connecting portion 12; wherein the second end 112 includes a recess 1121, and the recess 1121 is recessed toward the direction where the first end 111 is located; the connecting portion 12 includes a transition surface 121, and the transition surface 121 smoothly connects the recess 1121 and the surface of the handle 2, and the thickness of the transition surface 121 along the thickness direction Z of the blade 1 is greater than the thickness of the main body 11.

[0040] Based on the conventional design idea of ​​the tool, the first direction can be defined as the length direction of the tool, such as Figure 2 The X direction indicated by the arrow shown is the first direction, and the first end 111 of the main body 11 is the blade head end of the blade 1, and the second end 112 is the blade root end of the blade 1. The handle 2 can be connected to the upper part of the blade root end through the connecting portion 12. Based on the user's conventional gripping posture of the handle during cutting (such as the finger-pinching gripping posture and the mallet gripping posture; the finger-pinching gripping posture mainly refers to the middle finger, ring finger and little finger holding the handle, the thumb extends toward the blade head end and presses on one side of the blade, and the index finger presses on the other side of the blade toward the thumb; the mallet gripping posture mainly refers to the human hand holding the handle and making a fist, at which time the fingers do not contact the two sides of the blade) with one finger against the blade root end to facilitate force application, therefore, this solution makes the blade The second end 112 of the main body 11 of the knife 1 comprises a recess 1121, which is recessed toward the direction where the first end 111 is located, so that when the user holds the knife handle, the finger can be against the second end 112 of the main body 11 in the recess 1121. Since the chopping force application position of the blade during cutting is mostly in the middle area of ​​the blade, and the recess 1121 has a recessed amount toward the first end 111, the finger is closer to the chopping force application position of the blade in the state of the recess 1121, and the force arm formed between the finger and the chopping force application position of the blade is smaller, so that the cutting process will be more labor-saving. In addition, the connecting portion 12 connects the main body 11 with the handle 2, and the transition surface 121 of the connecting portion 12 smoothly connects the recess 1121 and the handle 2, so that the fingers can be inserted into the recess 1121 and abut against the end surface of the recess 1121 and the transition surface 121 without feeling any discomfort. Moreover, the thickness of the transition surface 121 along the thickness direction Z of the blade 1 is greater than the thickness of the main body 11, which improves the strength of the connecting portion 12 and makes the connection with the handle 2 more solid. At the same time, the sharpness of the lower end of the connecting portion 12 is weakened, so that the fingers are more comfortable when abutting against it without cutting the hands.

[0041] As a preferred embodiment of the present application, in the projection of the transition surface 121 on the normal surface in the first direction, the thickness of the transition surface 121 along the thickness direction Z of the blade 1 is L, and in the direction from the side of the transition surface 121 connected to the handle 2 to the side of the transition surface 121 connected to the recess 1121, the L gradually decreases. Based on the aforementioned embodiment in which the first direction is defined as the length direction of the tool, the normal surface in the first direction is a plane perpendicular to the first direction and extending along the thickness direction Z of the blade 1, and in the height direction of the tool (such as Figure 2 The Y direction indicated by the arrow is the height direction of the tool). Since the handle 2 is higher than the recess 1121 as a whole, and the transition surface 121 smoothly connects the recess 1121 and the handle 2, the transition surface 121 is a structure that gradually rises from the side connected to the recess 1121 to the side connected to the handle 2, and its projection on the normal surface in the first direction is also a structure that gradually rises. Then, on the normal surface in the first direction, the direction from the side of the transition surface 121 connected to the handle 2 to the side of the transition surface 121 connected to the recess 1121 is from top to bottom. When grasping, after the fingers are inserted into the recess 1121, the fingers mainly contact the upper part of the transition surface 121, and the pinching direction is also upward. Therefore, by gradually reducing the thickness L of the transition surface 121, this thickness gradient method, on the one hand, makes the transition of the transition surface 121 smooth, and on the other hand, it does not affect the comfort when grasping.

[0042] As a preferred embodiment of the present application, in the projection of the normal surface of the tool in the first direction, along the second direction, the maximum distance between the recess 1121 and the handle 2 is H1, H1 ≥ 35 mm; wherein the first direction, the thickness direction Z of the blade 1 and the second direction are perpendicular to each other. Figure 4 The Z direction indicated by the arrow is the thickness direction Z of the blade. Since the first direction, the thickness direction Z of the blade 1 and the second direction are perpendicular to each other, based on the embodiment in which the first direction is defined as the length direction of the tool, the second direction is the height direction of the tool, that is, the Y direction indicated by the arrow. Figure 3 As shown, along the second direction, the maximum spacing H1 between the recess 1121 and the handle 2, that is, the vertical distance between the lowest point of the recess 1121 and the highest point of the handle 2 in the tool height direction, H1≥35mm, can ensure that the fingers can be inserted into the recess 1121 and fit with the transition surface 121 in the gripping state, avoiding H1 being too small so that the fingers can only rest on the lower side of the recess 1121 or H1 being too large so that the fingers can only rest on the upper side of the recess 1121.

[0043] As a preferred implementation of the present application, Figure 3As shown, the projection of the recess 1121 on the normal surface in the thickness direction Z of the blade 1 is an arc, and the radius of curvature of each part of the arc is R, 12mm≤R≤25mm. When R is less than 12mm, the outline size of the recess 1121 will be too small, and the size of the recess 1121 cannot be satisfied by most users' fingers; when R is greater than 25mm, most of the area of ​​the second end 112 of the blade 1 is likely to be in a state of being recessed toward the first end 111, and the space reserved for the connection part 12 is too narrow, which reduces the size of the connection part 12 and is not conducive to the connection strength of the handle 2. Therefore, by making 12mm≤R≤25mm, this size limitation ensures that the fingers of most users can extend into the recess 1121 when holding the handle 2. At the same time, it also reasonably limits the recess amount of the recess 1121 toward the first end 111 of the main body 11, avoiding that the recess amount is too small and the labor-saving effect is not obvious, or the recess amount is too large and affects the comfort in the holding and force application state, and also reserves sufficient design space for the connecting part 12, ensuring that the connecting part 12 has sufficient outline dimensions, thereby ensuring the connection strength of the handle 2.

[0044] As a preferred embodiment of the present application, as shown in the figure, the transition surface 121 is constructed as an arc-shaped surface that is concave toward the back of the knife, and the two ends of the transition surface 121 are smoothly transitioned with the handle 2 and the recess 1121. The transition surface 121 is constructed as an arc-shaped surface that is concave toward the back of the knife, so that the transition surface 121 is more in line with the curvature of the finger, and the two ends of the transition surface 121 are smoothly transitioned with the handle 2 and the recess 1121. It can be understood that the connection position of the transition surface 121 with the handle 2 and the recess 1121 is flush or nearly flush, so that the finger does not feel uncomfortable when it is against the transition surface 121 and slides along the end surface of the transition surface 121 and the recess 1121 due to the application of force, thereby improving the comfort of operation. Specifically, based on the smooth transition between the transition surface 121 and the recess 1121 , the projection of the transition surface 121 along the thickness direction Z of the blade 1 can also be set as an arc and the curvature radius of each part of the arc can be consistent with the curvature radius of the recess 1121 .

[0045] As a preferred implementation of the present application, Figure 2 and Figure 3As shown, the main body 11 includes a first side surface 113 and a second side surface, and the first side surface 113 and the second side surface are arranged opposite to each other along the thickness direction Z of the blade 1; the connecting portion 12 includes: a first bevel 122 smoothly connecting the first side surface 113 and the handle 2; a second bevel smoothly connecting the second side surface and the handle 2; wherein the first bevel 122 and the second bevel are symmetrical, and the axis of symmetry is parallel to the first direction; the extension length of the portion of the connecting portion 12 provided with the first bevel 122 and the second bevel along the first direction is H2, and the maximum thickness of the portion of the connecting portion 12 provided with the first bevel 122 and the second bevel along the thickness direction Z of the blade 1 is δ, and H2 / δ≥4 / 5. This embodiment can still be based on the aforementioned first direction defined as the length direction of the tool, the first bevel 122 smoothly connects the first side surface 113 and the handle 2, and the second bevel smoothly connects the second side surface and the handle 2, Figure 2 and Figure 3 The middle dotted line represents the smooth joint position of the first bevel 122 and the first side surface 113. For the pinching grip posture, the thumb and index finger are in contact with the first bevel 122 and the second bevel respectively, thus improving the grip and operation comfort of the thumb and index finger; by making H2 / δ≥4 / 5, the thickness of the first bevel 122 and the second bevel along the thickness direction Z of the blade 1 is limited to a reasonable range, making the slope of the first bevel 122 and the second bevel more gentle, effectively preventing the first bevel 122 and the second bevel from being too large, causing a huge thickness difference from the handle 2 to the blade 1 and causing discomfort in gripping. In a preferred embodiment, δ can be designed to be 18 mm or less than 18 mm. Taking δ as 18 mm as an example, H2 should meet the requirement of not less than 14.4 mm.

[0046] Furthermore, the first bevel 122 and the second bevel are concave, so that on the basis of realizing a smooth connection between the handle 2 and the first side surface 113 and the second side surface of the blade 1, the concave shape of the first bevel 122 and the second bevel can also enhance the feel when pressed by fingers.

[0047] As a preferred implementation of the present application, Figure 2 As shown, the main body 11 includes a third end 114 and a fourth end 115 located at two ends of the second direction, respectively. The third end 114 is provided with a blade 1141, and the fourth end 115 is a blade back. In a preferred embodiment, the second end 112 and the third end 114 are connected through a first fillet 116; in another preferred embodiment, the first end 111 and the fourth end 115 are connected through a second fillet 117. By providing the first fillet 116 and the second fillet 117, the sharp position of the non-cutting part of the blade 1 is reduced, the risk factor during the use of the knife is reduced, and the safety of use is improved.

[0048] As a preferred embodiment, Figure 2 As shown, a buffer section 118 is provided between the first fillet 116 and the blade 1141, and the thickness of the buffer section 118 along the thickness direction Z is greater than the thickness of the blade 1141 along the thickness direction Z. Through this arrangement, when the user is operating the knife, the blade 1141 is as far away from the user as possible, reducing the danger of the sharp edge to the user. Preferably, the length of the buffer section 118 along the first direction can be set between 1-3 mm.

[0049] As a preferred embodiment, Figure 4 As shown, the connecting portion 12 includes a pressing surface 123 connected to the fourth end 115, and a plurality of anti-slip grooves 124 are arranged on the surface of the pressing surface 123. Through this arrangement, when the user presses on the pressing surface 123 during the operation of the tool, the anti-slip grooves 124 can increase the friction between the pressing surface 123 and the human hand, thereby reducing the risk of the human hand slipping off the pressing surface 123.

[0050] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0051] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0052] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A knife comprising a blade and a handle, wherein the handle is connected to the blade, characterized in that: The blade comprises a main body and a connecting portion, the main body comprises a first end and a second end respectively located at two ends of a first direction, and the second end is connected to the handle through the connecting portion; Wherein, the second end includes a recessed portion, which is recessed toward the direction where the first end is located; the connecting portion includes a transition surface, which smoothly connects the recessed portion and the surface of the handle, and the thickness of the transition surface along the thickness direction of the blade is greater than the thickness of the main body.

2. The tool according to claim 1, characterized in that In the projection of the transition surface on the normal surface in the first direction, the thickness of the transition surface along the thickness direction of the blade is L, and L gradually decreases in the direction from the side of the transition surface connected to the handle to the side of the transition surface connected to the recess.

3. The tool according to claim 1, characterized in that In the projection of the tool on the normal surface in the first direction, the maximum distance between the contour line of the recess and the contour line of the tool handle along the second direction is H1, and H1 is ≥ 35 mm; The first direction, the thickness direction of the blade and the second direction are perpendicular to each other.

4. The tool according to claim 1, characterized in that The projection of the recess on the normal surface in the thickness direction of the blade is an arc, and the radius of curvature of each part of the arc is R, 12mm≤R≤25mm.

5. The tool according to claim 1, characterized in that The transition surface is constructed as a concave arc surface, and two ends of the transition surface smoothly transition to the tool handle and the concave portion respectively.

6. The tool according to claim 1, characterized in that The body portion comprises a first side surface and a second side surface, wherein the first side surface and the second side surface are arranged opposite to each other along the thickness direction of the blade; The connecting portion includes: a first inclined surface smoothly connecting the first side surface and the surface of the handle; and a second inclined surface smoothly connecting the second side surface and the surface of the handle. The first bevel and the second bevel are symmetrical, and the axis of symmetry is parallel to the first direction; the extension length of the portion of the connecting portion provided with the first bevel and the second bevel along the first direction is H2, and the maximum thickness of the portion of the connecting portion provided with the first bevel and the second bevel along the thickness direction of the blade is δ, and H2 / δ≥4 / 5.

7. The tool according to claim 6, characterized in that The first inclined surface and the second inclined surface are concave.

8. The tool according to any one of claims 1 to 7, characterized in that: The main body comprises a third end and a fourth end respectively located at two ends of the second direction, the third end is provided with a blade, and the fourth end is a blade back; Wherein, the second end and the third end are connected via a first rounded corner; And / or, the first end is connected to the fourth end via a second rounded corner.

9. The tool according to claim 8, characterized in that A buffer section is provided between the first fillet and the blade, and a thickness of the buffer section along the thickness direction is greater than a thickness of the blade along the thickness direction.

10. The tool according to claim 8, characterized in that The connecting portion includes a pressing surface connected to the fourth end, and a surface of the pressing surface is provided with a plurality of anti-slip grooves.

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