Double-blade pencil sharpener

Abstract

A double-blade pencil sharpener comprises a knife rest, a conical pencil sharpening hole extending towards the front end of the knife rest is formed in the rear end face of the knife rest, a lead discharging through groove communicated with the pencil sharpening hole is formed in the extending direction of the pencil sharpening hole, a first blade and a second blade are arranged on the knife rest, and the cutting edge of the first blade and the cutting edge of the second blade are both tangent to the pencil sharpening hole. The horizontal distance between the front end of the first blade and the groove wall of the front end of the core discharging through groove is smaller than that between the front end of the second blade and the groove wall of the front end of the core discharging through groove. When the pencil is sharpened, the rear end of the first blade and the second blade cut a wooden rod of the pencil at the same time, sharpening efficiency is improved, sharpening of a pencil lead is completed through the protruding part at the front end of the first blade, the second blade does not sharpen the pencil lead, and the situation that the pencil lead is broken due to the fact that the two blades act on the pencil lead at the same time is avoided. The pencil sharpener has the advantages that the sharpening efficiency of the pencil sharpener is improved, meanwhile, a pencil lead is prevented from being broken during sharpening, and the pencil sharpening stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pencil sharpening tools, in particular to a pencil sharpener. BACKGROUND

[0002] A pencil sharpener is a tool for sharpening pencils, which has a conical hole for inserting a pencil, and a blade for cutting the pencil on the side of the hole. When using, the pencil is inserted and rotated to be sharpened into a conical shape for use.

[0003] In order to improve the efficiency of the pencil sharpener, people try to design new pencil sharpeners, such as a single-hole double-blade pencil sharpener disclosed in Chinese Utility Model Patent CN201856547U, which is provided with a blade along each of the two opposite conical generatrixes of the pencil hole.

[0004] The pencil sharpener with the above structure can improve the efficiency of the pencil sharpener when the rear ends of the two blades cut the pencil wood at the same time, but when the front ends of the two blades cut the pencil lead at the same time, the pencil lead is easily broken, and the pencil cannot be stably cut. SUMMARY

[0005] The present application provides a double-sided pencil sharpener that can efficiently and stably cut pencils.

[0006] The technical solution used by the present application to solve the above problems is: a double-blade pencil sharpener, which comprises a holder, the rear end face of the holder is provided with a conical pencil hole extending towards the front end of the holder, the pencil hole is provided with a lead removal channel communicating with the pencil hole in the extension direction, the holder is provided with a first blade and a second blade, the cutting edges of the first blade and the second blade are tangent to the pencil hole, the front ends of the first blade and the second blade are located in the lead removal channel, and the horizontal distance between the front end of the first blade and the front end groove wall of the lead removal channel is smaller than the horizontal distance between the front end of the second blade and the front end groove wall of the lead removal channel.

[0007] The pencil sharpener of the present application is provided with a first blade and a second blade, and the front end of the first blade protrudes relative to the second blade. When sharpening the pencil, the rear end of the first blade and the second blade cut the pencil wood at the same time, improving the efficiency of the pencil sharpener, and the sharpening of the pencil lead is completed by the protruding part of the front end of the first blade, and the second blade does not sharpen the pencil lead, avoiding the breakage of the pencil lead caused by the simultaneous action of the two blades. Compared with the prior art, the present application has the advantages of improving the efficiency of the pencil sharpener while maintaining the pencil lead from being easily broken, and improving the stability of the pencil sharpening.

[0008] As a preferred embodiment, the horizontal distance between the front end of the first blade and the front end of the second blade is 2.0-5.0 CM.

[0009] As preferred, the angle between the plane of the first blade and the axis of the lead hole is 11°, and the angle between the plane of the second blade and the axis of the lead hole is 11°. In this way, the lead core cut by the lead cutter is thinner

[0010] As preferred, the width of the core discharging channel is greater than the diameter of the front end of the lead hole.

[0011] As preferred, the length of the first blade is greater than the length of the second blade. In this way, the rear ends of the two blades can be arranged in parallel, and the front end of the first blade protrudes relative to the front end of the second blade, avoiding the increase of the length of the lead cutter.

[0012] As preferred, the first blade is parallel to the second blade in the cross section along the axis of the lead hole. After the two blades cut the two sides of the pencil synchronously, the cutting deviation of the cut pencil can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the double-blade lead cutter of the utility model.

[0014] Figure 2 It is a structure schematic view of the double-blade lead cutter of the utility model from another direction.

[0015] Figure 3 It is a cross-sectional view of the double-blade lead cutter of the utility model along the axis of the lead hole.

[0016] Figure 4 It is a schematic view of the blade position of the double-blade lead cutter of the utility model.

[0017] As shown in the figure: 1, cutter holder, 10, lead hole, 11, core discharging channel, 21, first blade, 22, second blade. DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with the drawings and specific embodiments.

[0019] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a double-blade pencil sharpener includes a blade holder 1. The rear end of the blade holder 1 has a conical pencil sharpening hole 10 extending towards the front end, which is also the direction the pencil tip points when the pencil is inserted into the hole. The front end of the blade holder 1 has a lead-collecting groove 11, located in the extending direction of the pencil sharpening hole 10 and communicating with it. The blade holder 1 has a first blade 21 and a second blade 22. The cutting edges of both the first blade 21 and the second blade 22 are tangent to the pencil sharpening hole 10. The front ends of the first blade 21 and the second blade 22 are located within the lead-collecting groove 11. The front end of the first blade 21 protrudes forward relative to the second blade 22. The horizontal distance between the front end of the first blade 21 and the front wall of the lead-collecting groove 11 is less than the horizontal distance between the front end of the second blade 22 and the front wall of the lead-collecting groove 11.

[0020] The horizontal distance between the tip of the first blade 21 and the tip of the second blade 22 is 2.0 to 5.0 cm. In this example, the horizontal distance between the tip of the first blade 21 and the tip of the second blade 22 is 3.0 cm, which is the length of the lead core protruding from the wooden rod.

[0021] The plane containing the first blade 21 forms an angle of 11° with the axis of the pencil sharpening hole 10, and the plane containing the second blade 22 also forms an angle of 11° with the axis of the pencil sharpening hole 10. This design allows the pencil sharpener to produce a finer pencil lead.

[0022] The width of the core-laying groove 11 is greater than the diameter of the hole at the front end of the brush-rolling hole 10.

[0023] The length of the first blade 21 is greater than the length of the second blade 22. In this example, the length of the first blade 21 is 23mm, and the length of the second blade 22 is 19mm. With this setting, the rear ends of the two blades can be aligned, and the front end of the first blade 21 protrudes relative to the front end of the second blade 22, avoiding the need to increase the length of the pencil sharpener.

[0024] like Figure 4 As shown, the two blades are V-shaped on the same plane. The first blade 21 is parallel to the second blade 22 in a cross-section along the axis of the pencil-twisting hole 10. Figure 3 As shown, the cutting point of the first blade 21 and the cutting point of the second blade 22 are symmetrical along the axis of the pen winding hole.

[0025] This utility model pencil sharpener is equipped with a first blade 21 and a second blade 22, with the front end of the first blade 21 protruding relative to the second blade 22. When sharpening a pencil, the rear end of the first blade 21 and the second blade 22 simultaneously cut the pencil shaft. The first blade 21 and the second blade 22 act synchronously on the outer walls of the pencil's symmetrical sides, improving sharpening efficiency and effectively reducing lead deviation, including both the shaft deviation and the lead lead deviation. The lead lead is sharpened by the protruding part at the front end of the first blade 21; the second blade 22 does not sharpen the lead lead, avoiding breakage due to simultaneous action of both blades on the lead lead, thus improving pencil sharpening stability.

Claims

1. A double-bladed pencil sharpener characterized by: The utility model relates to a pencil sharpener, including the knife rest (1), the knife rest (1) rear end surface is equipped with the conical pencil hole (10) to the knife rest (1) front end extension, the pencil hole (10) extension direction is equipped with the core removal channel (11) of communication with the pencil hole (10), be equipped with the first blade (21) and the second blade (22) on the knife rest (1), the blade edge of first blade (21) and second blade (22) all are tangent to the pencil hole (10), the front end of first blade (21) and second blade (22) is located in the core removal channel (11), and the horizontal distance between the front end of first blade (21) and the front end groove wall of core removal channel (11) is less than the horizontal distance between the front end of second blade (22) and the front end groove wall of core removal channel (11).

2. The double-bladed pencil sharpener of claim 1, wherein: The horizontal distance between the front end of first blade (21) and the front end of second blade (22) is 2.0-5.0 CM.

3. The double-bladed pencil sharpener of claim 1, wherein: The angle between the plane where first blade (21) is located and the axis of pencil hole (10) is 11°, and the angle between the plane where second blade (22) is located and the axis of pencil hole (10) is 11°.

4. The double-bladed pencil sharpener of claim 1, wherein: The width of core removal channel (11) is greater than the aperture of the front end of pencil hole (10).

5. The double-bladed pencil sharpener of claim 1, wherein: The length of first blade (21) is greater than the length of second blade (22).

6. The double-bladed pencil sharpener of claim 1, wherein: First blade (21) is parallel to second blade (22) in the cross section along the axis of pencil hole (10).

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