Pencil sharpener

Abstract

The pencil sharpener comprises a shell, a taper hole used for inserting pens is formed in the shell in the axial direction, an installation opening is formed in the side wall of the taper hole in the length direction, a cutting tool bit is arranged at the position of the installation opening, and a flat cutting tool bit is arranged at the position, located at the tip end of the taper hole, of the shell. The face, facing the tip of the taper hole, of the planing tool bit forms a cutting edge face, and a plurality of cutting edges distributed side by side are arranged on the surface of the cutting edge face. The pencil sharpener can prevent a sharpened pencil point from being too sharp.

Description

TECHNICAL FIELD

[0001] The utility model relates to stationery technical field, especially a pencil sharpener. BACKGROUND

[0002] Pencil sharpener is the tool of cutting pencil, wax pencil or eyebrow pencil, and the specific use mode is that the pen head is inserted into the conical hole of the holder, and the pen head is cut under the action of the cutter head through the relative rotation of the pen and the holder, and the cut pen head is conical. However, the pencil tip of the cut pen head is too sharp, which can cause the following problems: 1. the paper is easily torn during writing, 2. the person is easily scratched, especially the children, 3. the pencil tip is easily broken during writing. CONTENT

[0003] The utility model aims at solving the technical deficiency of the above-mentioned and designs a pencil sharpener.

[0004] The utility model designs pencil sharpener, including the casing, the conical hole for inserting the pen is arranged in the casing along the axial direction, the lateral wall of the conical hole is provided with the installation port along the length direction, the installation port is equipped with the cutting cutter head, the flat cutting cutter head is equipped at the tip of the conical hole of the casing, the one side of the flat cutting cutter head towards the tip of the conical hole forms the cutting edge surface, the surface of the cutting edge surface is equipped with a plurality of side-by-side distribution cutting edges.

[0005] As preferred, each cutting edge is a triangular prism, so that the cross section of the cutting edge surface is a triangular wave shape.

[0006] Further optimization, the cutting edge is integrally formed with the flat cutting cutter head.

[0007] As preferred, the flat cutting cutter head is integrally designed with the casing, and the tip of the conical hole is towards the center of the flat cutting cutter head.

[0008] Further optimization, the casing forms a chip opening between the flat cutting cutter head and the tip of the conical hole.

[0009] As preferred, the cutting cutter head is integrally designed with the casing or detachably mounted on the casing.

[0010] As preferred, the casing forms an installation plane near the installation port, the cutting cutter head is attached to the installation plane, and the casing is provided with a positioning part for limiting the cutting cutter head.

[0011] Further optimization, the first installation hole is formed on the casing and penetrates the upper and lower surfaces, the second installation hole is formed on the cutting cutter head, and the first installation hole and the second installation hole are fastened and connected through the cooperation of the screw or bolt and the nut, so that the cutting cutter head is detachably mounted on the casing.

[0012] As preferred, the opening end of the taper hole is located at one end of the shell, and the other end of the shell is provided with a mounting portion, and the top end of the mounting portion is provided with an X-shaped or cross-shaped mounting slot.

[0013] The technical effect of the utility model is that the pen head is inserted into the taper hole from the opening end and abuts against the cutting tool head, the pen head is cut by the cutting tool head through rotation, the pen point is gradually sharpened, when the pen point is cut to the top end and abuts against the flat cutting tool head, the flat cutting tool head grinds the pen point along with the continuous rotation of the pen point, thereby preventing the pen point from being too sharp, the pen point is not easy to scratch paper during writing, and the pen point is also not easy to break. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model;

[0015] Figure 2 It is another perspective view of the overall structure of the utility model;

[0016] Figure 3 It is the overall structure explosion diagram of the utility model;

[0017] Figure 4 It is the overall structure front view of the utility model;

[0018] Figure 5 It is Figure 4 A-A direction sectional view.

[0019] In the drawing: 1, shell; 11, mounting plane; 12, first mounting hole; 13, mounting portion; 14, mounting slot; 2, taper hole; 21, mounting port; 22, opening end; 3, cutting tool head; 31, second mounting hole; 4, flat cutting tool head; 41, cutting edge surface; 42, cutting edge; 5, scrap opening; 6, first positioning portion; 7, second positioning portion; 8, screw; 9, nut. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art belong to the protection scope of the utility model.

[0021] The utility model discloses a shell 1, such as Figure 1 And 2As shown, the housing 1 is provided with a taper hole 2 for inserting the pen along the axial direction, the opening end 22 of the taper hole 2 is located at one end of the housing 1 as an insertion port for the pen to be inserted, the pen head is inserted into the taper hole 2, the outer wall of the pen head abuts against the cutting tool head 3, the side wall of the taper hole 2 is provided with a mounting port 21 along the length direction, the cutting tool head 3 is arranged at the mounting port 21, the cutting edge 42 of the cutting tool head 3 is close to the mounting port 21, the pen is cut by rotating to make the pen point gradually sharp; the housing 1 is provided with a flat cutting tool head 4 at the tip end of the taper hole 2, in the embodiment, the flat cutting tool head 4 is in a cylindrical structure, one end of the flat cutting tool head 4 is integrally connected with the housing 1, the other end forms a cutting edge surface 41 towards the tip end of the taper hole 2, the surface of the cutting edge surface 41 is provided with a plurality of cutting edges 42 arranged side by side, each cutting edge 42 is in a triangular prism shape, the plurality of cutting edges 42 are arranged side by side to make the cross section of the cutting edge surface 41 as a whole in a triangular wave shape, the cutting edge 42 is integrally formed with the cutting edge surface 41 to make the overall structure more simple and ensure the strength of the cutting edge 42, when the pen point is cut to a certain degree, it will become sharp, the sharp pen point will touch the cutting edge surface 41 of the flat cutting tool head 4, with the continuous rotation of the pen point, the sharp pen point is ground flat by the cutting edge 42 on the cutting edge surface 41, thereby preventing the cut pen point from being too sharp, which not only is not easy to scratch the paper when writing, but also protects the person, especially the children, from being scratched by the pen point, at the same time, the pen point is not easy to break.

[0022] The pen generally refers to a pencil, an eyebrow pencil and a wax pencil and the like which are easy to cut.

[0023] Further, the tip end of the taper hole 2 is towards the central part of the flat cutting tool head 4, so that when cutting, the pen point can abut against the central position of the flat cutting tool head 4 to prevent the pen point from deviating and not contacting the cutting edge surface 41.

[0024] Further, the housing 1 forms a debris opening 5 between the flat cutting tool head 4 and the tip end of the taper hole 2, so that the debris cut by the pen point can be discharged through the debris opening 5 to prevent the debris from accumulating in the tip end of the taper hole 2 to affect the grinding of the pen point, the debris opening 5 can also be used as a viewing window to observe the cutting and grinding of the pen point, it should be noted that the mounting port 21 is also an opening, so that the debris cut by the pen head can be discharged to the outside of the taper hole 2 through the mounting port 21 to prevent accumulation.

[0025] Further, the cutting tool head 3 is integrally designed with the housing 1 or is detachably mounted on the housing 1. When it is in a detachable connection mode, the housing 1 is provided with a first mounting hole 12 penetrating the upper and lower surfaces, the cutting tool head 3 is provided with a second mounting hole 31, a screw 8 or a bolt passes through the first mounting hole 12 and the second mounting hole 31, the other end of the screw 8 or the bolt cooperates with a nut 9 to form a fastening connection, so that the cutting tool head 3 is detachably mounted on the housing 1, the screw 8 or the bolt is inserted from one side of the housing 1, and the nut 9 is cooperated and fixed from the other side of the housing 1, which is convenient for mounting and dismounting the cutting tool head 3.

[0026] Further, the shell 1 forms a mounting plane 11 near the mounting port 21, the cutting tool head 3 is attached to the mounting plane 11, and the shell 1 is provided with a positioning portion, in the embodiment, the positioning portion includes a first positioning portion 6 and a second positioning portion 7, both of which are designed in an integral manner with the shell 1, the first positioning portion 6 abuts against the side of the cutting tool head 3, and the second positioning portion 7 abuts against the top of the cutting tool head 3, it should be noted that, in the embodiment, the cutting tool head 3 is attached along the outer periphery of the taper hole 2, so that the cutting tool head 3 forms an angle with the axial direction of the taper hole 2, that is, the taper of the taper hole 2, the second positioning portion 7 is located at the top of the lowest part of the cutting tool head 3, preventing the cutting tool head 3 from being raised, therefore, the first positioning portion 6 and the second positioning portion 7 jointly limit the cutting tool head 3 in two directions, thereby enhancing the stability of the cutting tool head 3.

[0027] Further, the opening end 22 of the taper hole 2 is located at one end of the shell 1, and the other end of the shell 1 is provided with a mounting portion 13, the top end of the mounting portion 13 is provided with an X-shaped or cross-shaped mounting slot 14, so that the shell 1 is mounted on other structures through the mounting portion 13 to form a pencil sharpener with different shapes, such as an electric pencil sharpener assembled on an electric structure.

[0028] Further, the angle between the length direction of the flat cutting tool head 4 and the axial direction of the taper hole 2 is α, 85°≤α≤90°, and the length direction of the flat cutting tool head 4 is perpendicular to the axial direction of the taper hole 2, which is the best, so that the surface cut by the pencil tip under the action of the flat cutting tool head 4 is basically a plane, and the sharp end of the pencil tip can be effectively eliminated, that is, the grinding efficiency is high.

[0029] The utility model is not limited to the above-mentioned best implementation, and anyone can derive other various forms of products under the inspiration of the utility model, but no matter any change in shape or structure, any technical scheme with the same or similar to the present application falls within the protection scope of the utility model.

Claims

1. A pencil sharpener, characterized in that, The device includes a housing (1), which has a tapered hole (2) for inserting pens along the axial direction inside the housing (1). The sidewall of the tapered hole (2) has an installation opening (21) along the length direction. A cutting head (3) is provided at the installation opening (21). The housing (1) has a flat cutting head (4) at the tip of the tapered hole (2). The side of the flat cutting head (4) facing the tip of the tapered hole (2) forms a cutting edge (41). The surface of the cutting edge (41) has multiple cutting edges (42) arranged side by side.

2. The pencil sharpener according to claim 1, characterized in that, Each blade (42) is triangular prism-shaped, making the cross section of the blade face (41) triangular wavy.

3. The pencil sharpener according to claim 2, characterized in that, The cutting edge (42) and the flat cutting head (4) are integrated.

4. The pencil sharpener according to claim 3, characterized in that, The planing head (4) is integrated with the housing (1), and the tip of the tapered hole (2) faces the center of the planing head (4).

5. The pencil sharpener according to claim 4, characterized in that, The housing (1) forms a chip opening (5) between the tip of the planing cutter head (4) and the tapered hole (2).

6. The pencil sharpener according to claim 1, characterized in that, The cutting head (3) is integrated with the housing (1) or detachably mounted on the housing (1).

7. The pencil sharpener according to claim 1, characterized in that, The housing (1) forms a mounting plane (11) near the mounting port (21), the cutting head (3) is attached to the mounting plane (11), and the housing (1) is provided with a positioning part for limiting the cutting head (3).

8. The pencil sharpener according to claim 7, characterized in that, The housing (1) has a first mounting hole (12) that passes through the top and bottom surfaces, and the cutting head (3) has a second mounting hole (31). The first mounting hole (12) and the second mounting hole (31) are fastened together by screws (8) or bolts and nuts (9), so that the cutting head (3) can be detachably mounted on the housing (1).

9. The pencil sharpener according to claim 1, characterized in that, The opening end (22) of the conical hole (2) is located at one end of the housing (1), and the other end of the housing (1) is provided with a mounting part (13), and the top end of the mounting part (13) is provided with an X-shaped or cross-shaped mounting slot (14).

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