Electric scissor head

Abstract

The utility model relates to electric scissors, in particular to an electric scissors head which comprises a fixed blade and a movable blade, the cutting edge of the fixed blade is a straight edge and extends to the front top end of the fixed blade from back to front along the upper end face of the fixed blade, and the length L of the cutting edge of the fixed blade ranges from 10 mm to 30 mm. The fixed blade cutting edge and the front end face of the fixed blade form a tip with an acute angle r; the cutting edge of the movable blade extends to the front bottom end of the movable blade from back to front along the lower end face of the movable blade, the front bottom end of the cutting edge of the movable blade can move to coincide with the cutting edge of the fixed blade, the distance between the cutting edge intersection point formed by coincidence and the front top end of the cutting edge of the fixed blade is d, and d ranges from 0 mm to 3 mm. The cutting tool is simple in structure, is suitable for various fine cutting due to the size and the shape of the tool bit and the arrangement between the cutting edges, and is particularly suitable for cutting right-angle sewing lines in the shoemaking process.

Description

Technical Field

[0001] This utility model relates to a scissor blade head, specifically an electric scissor blade head. Background Technology

[0002] In the shoemaking process, cutting is usually divided into two stages: preliminary cutting and fine cutting. Preliminary cutting involves dividing large pieces of leather into the required shapes and sizes. At this stage, the cutting is not particularly precise and will need to be adjusted in subsequent processes. Fine cutting involves sewing different leather parts together and then trimming them more precisely at a certain distance (about 2mm to 3mm) from the seam line. This trimming removes excess leather and ensures that the shape and size of each part are accurate, resulting in shoes that fit well and look good.

[0003] To improve work efficiency and reduce worker fatigue, electric shears have largely replaced manual shears in the initial cutting stage. However, the finishing cutting stage demands higher precision. Existing electric shears, when used in the finishing process, can only cut along straight seams. The finishing process often involves cutting along angled seams, especially right-angled seams, requiring the leather within the right angle to be cut along the seam. Figure 1 The diagram illustrates a common precision cutting area encountered in shoemaking. Specifically, the leather piece 1 to be cut is sewn together with another piece of leather (the other piece of leather is not shown in the diagram because it overlaps with the leather piece 1). At this point, the seam line 2 forms the cutting area 3. The leather in the cutting area 3 needs to be cut away through precision cutting. In practice, the cutting is generally done approximately 2mm to 3mm from the seam line 2. Figure 1 In this code, the cutting line 4 is used to represent the cutting trajectory. For example... Figure 2 The diagram shows a schematic of an existing electric shears for cutting fabric / leather. As can be seen, the fixed blade edge 7 on the fixed blade 5 and the moving blade edge 9 on the moving blade 6 are located in the middle of their respective blades, with no edge at the front. Therefore, the effective cutable area formed during the cutting process is significantly further from the blade tip. When using this blade structure to cut the area 3, it cannot reach the right-angle bend of the seam line 2, requiring manual shears for secondary trimming at the right angle. In mass production of shoes requiring precise cutting, using manual shears severely impacts production efficiency. Utility Model Content

[0004] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide an electric scissor blade head to achieve efficient and precise cutting at angled seams, especially right-angled seams.

[0005] In order to achieve the above object, the utility model adopts the technical scheme as follows: A kind of electric scissors head, including fixed blade, rotatable dynamic blade being arranged above fixed blade, the upper end surface of fixed blade and the lower end surface of dynamic blade are correspondingly provided with cutting edge, the fixed blade cutting edge is straight blade, fixed blade cutting edge extends to fixed blade front top end from rear to front along the upper end surface of fixed blade, and the fixed blade cutting edge and fixed blade front end surface form sharp end with included angle of acute angle r;Dynamic blade cutting edge extends to dynamic blade front bottom end from rear to front along the lower end surface of dynamic blade, the dynamic blade moves to fixed blade until the front bottom end of dynamic blade cutting edge and fixed blade cutting edge coincide to form cutting edge intersection point, the distance between the cutting edge intersection point and the front top end of fixed blade cutting edge is d, and the range of d is 0-3mm.

[0006] As the limitation of the utility model: the angle range of the sharp end r of fixed blade is 30 °-50 °.

[0007] As the limitation of the utility model: the length L of fixed blade cutting edge is 10-30mm;The height H between fixed blade cutting edge and the lower end surface of fixed blade is 3-8mm.

[0008] As the limitation of the utility model: the lower end surface of fixed blade and fixed blade front end surface are transition arc surface.

[0009] As the limitation of the utility model: the opening angle range of fixed blade cutting edge and dynamic blade cutting edge is all 15 °-35 °.

[0010] As the limitation of the utility model: the material of fixed blade and dynamic blade is any one of high carbon steel, alloy steel or ceramic coating.

[0011] Compared with prior art, the utility model has the beneficial effects that:

[0012] The utility model is provided with straight line type cutting edge on the upper end surface of fixed blade, and the sharp end with included angle of acute angle r is formed by fixed blade cutting edge and fixed blade front end surface, and the front bottom end of dynamic blade cutting edge can move to coincide with fixed blade cutting edge, so compared with the cuttable area of prior art electric scissors for cutting cloth / leather, the cuttable area formed by the utility model can cut the corner of suture line, especially can effectively and quickly cut the inside of right angle corner, the distance d between cutting edge intersection point and fixed blade cutting edge front top end can avoid that the suture line at the front end of head is broken due to too deep cutting, and the size of the utility model head is much smaller than prior art electric scissors head for cutting cloth / leather, so it can meet the fine operation in fine cutting process, and the shape of the utility model head and the design of cutting edge make it suitable for various fine cutting, and it is simple in structure and flexible in operation, especially suitable for cutting right angle suture line in shoemaking process. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the trimming range;

[0015] Figure 2 A schematic diagram of the structure of existing electric scissors for cutting fabric / leather.

[0016] Figure 3 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0017] Figure 4 This is a front view of an embodiment of the present utility model;

[0018] Figure 5 This is a rear view of the moving blade and the fixed blade in the closed state according to an embodiment of the present invention;

[0019] Figure 6 This utility model embodiment is shown in the usage diagram at the right-angle stitch line.

[0020] In the diagram: 1-Leather material to be cut, 2-Sewing line, 3-Cutting area, 4-Cutting line, 5-Fixed blade, 6-Moving blade, 7-Fixed blade edge, 8-Fixed blade front face, 9-Moving blade edge, 10-Blade intersection point, 11-Electric handle. Detailed Implementation

[0021] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. It should be understood that the electric scissor head described herein is a preferred embodiment and is only used for illustration and explanation of this utility model, and does not constitute a limitation thereof.

[0022] The directional terms or positional relationships used in this utility model, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this utility model. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model. Example

[0023] This implementation example Figures 3 to 6 The image shows an electric scissor head, comprising a fixed blade 5 and a movable blade 6. The movable blade 6 is rotatably positioned above the fixed blade 5. The upper end face of the fixed blade 5 and the lower end face of the movable blade 6 are respectively provided with cutting edges. The movable opening ends of both blades face forward. The scissor head is mounted on an electric handle 11. The movable blade 6 performs a reciprocating shearing motion relative to the fixed blade 5. The electric handle 11 and its operating method and principle are implemented using existing technology.

[0024] As shown in Figure 3 and Figure 4 , the fixed blade edge 7 is a straight edge, and the fixed blade edge 7 extends from the rear to the front along the upper end face of the fixed blade 5 to the front top end of the fixed blade 5, that is, the straight linear blade edge is provided on the entire upper end face of the fixed blade 5, the fixed blade edge 7 forms an included angle r with the front end face 8 of the fixed blade 5, the included angle r is an acute angle, so that the front top end of the fixed blade 5 forms a pointed end, specifically, the angle range of the pointed end included angle r of the fixed blade 5 is 30°-50°, and the r of the embodiment is preferably 40°. The length L of the fixed blade edge 7 ranges from 10 to 30 mm, and the height H between the fixed blade edge 7 and the lower end face of the fixed blade 5 ranges from 3 to 8 mm, which can make the fixed blade 5 as close as possible to the sewing line 2 under the premise of ensuring the strength of the fixed blade 5, and can ensure that the width of the cut leather from the sewing line 2 can meet the process requirement of 2-3 mm, and in the embodiment, L is selected as 12 mm, and H is selected as 3.5 mm. In order to make the fixed blade 5 move forward more smoothly during cutting, the transition arc surface is provided between the front end face 8 of the fixed blade and the lower end face of the fixed blade 5.

[0025] The moving blade edge 9 extends from the rear to the front along the lower end face of the moving blade 6 to the front bottom end of the moving blade 6, and when the moving blade 6 moves towards the fixed blade 5, when the front bottom end of the moving blade 6 rotates to the lowest position, it can coincide with the fixed blade edge 7, and the coincidence of the front bottom end of the moving blade 6 and the fixed blade edge 7 forms a blade intersection point 10, as shown in Figure 5 , the distance between the blade intersection point 10 and the front top end of the fixed blade edge 7 is d, and the range of d is 0-3 mm, and the setting of d can avoid the sewing line 2 from breaking due to excessive trimming at the right angle of the sewing line, and can ensure that the cutting edge is about 2-3 mm away from the sewing line 2, and at the same time, this design that the front bottom end of the moving blade 6 does not exceed the front top end of the fixed blade 5 can ensure that the line of sight is not blocked during cutting, so as to facilitate fine cutting, especially for cutting at angles. In addition, the moving blade edge 9 is preferably linear, and of course it can also have a downward convex arc, which can meet the requirement that the distance between the blade intersection point 10 and the front top end of the fixed blade edge 7 is d.

[0026] The opening angle of the blade is related to the properties of the material to be cut, and in the embodiment, the fixed blade edge 7 and the moving blade edge 9 are selected to have a small opening angle, which can improve the sharpness and reduce the cutting resistance, so that it is suitable for smooth cutting near the sewing line 2, and specifically, the opening angle of the blade ranges from 15° to 35°. At the same time, in order to ensure the strength performance of the blade, the material of the fixed blade 5 and the moving blade 6 is preferably any one of high carbon steel, alloy steel or ceramic coating.

[0027] When the embodiment is used, as shown in Figure 6As shown, the electric scissors cut along the stitching line 2, and during cutting, the inclination angle of the overall cutter head can be selected according to the height H to ensure that the cutting edge cuts at a position within a range of about 2mm-3mm from the stitching line 2. When cutting to the right angle, since the front top end of the fixed blade 5 is provided in a pointed shape and the front bottom end of the moving blade cutting edge 9 can move downward to coincide with the fixed blade cutting edge 7, the blade can cut to the right angle of the stitching line 2 without trimming too deeply. Moreover, since the overall cutter head has a small size, the blade can flexibly turn and continuously cut the other side of the right angle stitching line 2. Finally, the problem that the existing electric scissors for cutting leather cannot perform fine cutting due to the unreasonable design of the cutter head shape, size and cutting edge position is solved, especially the problem that the electric scissors cannot cut the leather in the right angle stitching line 2.

Claims

1. An electric scissor head, comprising a fixed blade and a movable blade rotatably disposed above the fixed blade, wherein the upper end face of the fixed blade and the lower end face of the movable blade are provided with cutting edges, characterized in that: The blade of the fixed blade is a straight blade, which extends from back to front along the upper end face of the fixed blade to the front tip of the fixed blade, and the blade of the fixed blade and the front end face of the fixed blade form an acute angle r at the tip. The moving blade extends from back to front along the lower end face of the moving blade to the front bottom end of the moving blade. The moving blade moves toward the fixed blade until the front bottom end of the moving blade coincides with the blade of the fixed blade to form a blade intersection point. The distance between the blade intersection point and the front top end of the blade of the fixed blade is d, and the range of d is 0 to 3 mm.

2. The electric scissor head according to claim 1, characterized in that: The angle range of the tip r of the fixed blade is 30° to 50°.

3. The electric scissor head according to claim 2, characterized in that: The length L of the fixed blade edge ranges from 10 to 30 mm; the height H between the fixed blade edge and the lower end face of the fixed blade ranges from 3 to 8 mm.

4. The electric scissor head according to claim 3, characterized in that: The front end face of the fixed blade and the lower end face of the fixed blade are connected by a transition arc surface.

5. An electric scissor blade according to any one of claims 1 to 4, characterized in that: The opening angle range of both the fixed blade and the moving blade is 15° to 35°.

6. The electric scissor head according to claim 5, characterized in that: The fixed blade and the moving blade are made of any one of high carbon steel, alloy steel, or ceramic coating.

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