CN2196034Y

CN2196034Y - Automatic pencil sharpener

Info

Publication number: CN2196034Y
Application number: CN 94239127
Authority: CN
Inventors: 叶亚东
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-26
Filing date: 1994-07-26
Publication date: 1995-05-03
Anticipated expiration: 2004-07-26

Abstract

The utility model discloses an automatic pencil sharpener which is characterized in that a fixed seat 4 is provided with an inside engaged gear 41 which is coaxial with a sharpener frame 2. A sharpener tool 3 adopts a hob with a plurality of cutting edges. The upper end part of the hob is provided with a gear 31 which is engaged with the inside engaged gear 41. The axial line and the vertical line of the sharpener tool 3 form the angle of 9 DEG. The utility model has the advantages that the sharpener tool is provided with the hob with a plurality of cutting edges, service life can be extended by more than 10 times, and the sharpener tool relative to the axial line of a pencil does twokinds of movements of revolution and rotation when the pencil is sharpened. Sharpening speed is fast and sharpening surface is smooth and clean. A stiffening rib 22 on the sharpener frame 2 is also used as a scraper for effectively sweeping sharpened chips in a chip collecting chamber 5 in time.

Description

Automatic pencil sharpener

The utility model relates to a kind of pencil or leads sharpening device that has gear drive.

Traditional pencil sharpener is made up of knife rest, blade, screw, has a pen-laying hole on knife rest, and screw is fixed on blade on the knife rest, inserts pencil in the pen-laying hole and rotate by hand to sharpen the point of a pencil.Chinese patent CN88205395.7 provides a kind of electronic pencil sharpener, this pencil sharpener is made up of power supply, switch, micromachine, gear drive, knife rest, cutter, holder, smear metal collecting chamber, housing, cutter is arranged on the knife rest, micromachine, gear drive, knife rest are installed on the holder, when connecting power supply, micromachine drives the knife rest rotation by gear drive, and cutter cuts the pencil that inserts in the pen-laying hole, and smear metal accumulates in the smear metal collecting chamber.The defective of this scheme is: (1) cutter adopts the blade of hilted broadsword sword, the blade quick abrasion, and then cutting effect is not good behind the blade blunt, influences the service life of pencil sharpener; (2) smear metal of single-blade cutting is the roll film shape, and cutting face fineness is relatively poor, and pencil-lead is easier to twist off.

The purpose of this utility model is to design the automatic sharpener of a kind of pencil, cutter adopts the hobboing cutter of multitool sword, for the axis that is cut pencil, this hobboing cutter is done revolution and two kinds of motions of rotation simultaneously, and rotational velocity is much larger than revolution speed, thereby reach the purpose that improves sharpener service life and cutting quality, there is quite high fineness in its cutting face, can avoid pencil-lead to twist off.

Fig. 1 is the structural representation of the automatic sharpener of this pencil.

Fig. 2 is knife rest, cutter structure schematic diagram.

Fig. 3 is the upward view of inside engaged gear.

Fig. 4 is the vertical view of sharpener.

Fig. 5 is the upward view of sharpener.

As shown in Figure 1, this automatic pencil sharpener comprises power supply E, K switch, micro electric Machine D, gear drive 1, knife rest 2, cutter 3, holder 4, smear metal collecting chamber 5, housing 6, wherein cutter 3 is arranged on the knife rest 2, micromachine D, gear drive 1, knife rest 2 is installed on the holder 4, and during plugged, micromachine D is by 2 rotations of gear drive 1 band movable knife rack, 3 pairs of pencils that insert pen-laying hole 21 of cutter cut, smear metal is gathered in the smear metal collecting chamber 5, it is characterized in that holder 4 is provided with an inside engaged gear 41 with knife rest 2 center line coaxial arrangement, and cutter 3 adopts the sword that rolls of multitool swords, its upper end is provided with a gear 31, this gear 31 and inside engaged gear 41 engagements.

The axis of cutter 3 and knife rest 2 center lines intersect, and its angle is 9 °; Knife rest 2 is provided with reinforcement 22, utilize reinforcement 22 with the smear metal scraping delivery that disperses in smear metal collecting chamber 5.After cutting finishes, unplug smear metal collecting chamber 5 smear metal is outwelled, holder 4 is divided into the upper and lower, and housing 6 is made of case, drain pan, power supply cover plate.

B among Fig. 2 is a pencil, be in the state of being cut, Fig. 3 demonstrates inside engaged gear 41 and the pen plughole 42 on the holder 4, Fig. 4 demonstrates the pen plughole 61 on the case, its left side is smear metal collecting chamber 5, and right part is arranged the K switch button, and Fig. 5 demonstrates the hole 62 of arranging hold-down screw, the left end outside is a smear metal collecting chamber 5, and right-hand member is the power supply cover plate.Adopt hold-down screw that holder 4 and housing 6 are connected as a single entity.

With prior art relatively, this programme has the following advantages:

1. cutter adopts the hobboing cutter of multitool sword, can improve service life more than 10 times;

2. cutter cuts around being cut face, is cut the surface smoothness height, and pencil-lead can not twist off during cutting;

3. knife rest is provided with the reinforcement of double as smear metal scraper plate, smear metal can be swept in the smear metal collecting chamber immediately.

Embodiment:

Make the automatic sharpener of a kind of pencil as Fig. 1 structure, adopt dc source 6V, K switch is a press button, micromachine power 5W, rotating speed is that per minute 3000 changes, travelling gear adopts 6, by its transmission order, is followed successively by 8 teeth, 34 teeth, 8 teeth, 35 teeth, 9 teeth, 55 teeth, cutter adopts the hobboing cutter of 7 blades, its end gear is 6 teeth, and inside engaged gear is 25 teeth, and the angle of hobboing cutter axis and knife rest center line is 9 °.Smear metal is powdery, and the pencil surface smoothness that is cut is high especially.Knife rest 2, holder 4, smear metal collecting chamber 5, housing 6 adopt rigid plastics to make, and complete machine is of a size of 140 * 50 * 85mm, and weight is 300 grams.

Claims

1, the automatic sharpener of a kind of pencil, comprise power supply [E], switch [K], micromachine [D], gear drive [1], knife rest [2], cutter [3], holder [4], smear metal collecting chamber [5], housing [6], wherein cutter [3] is arranged on the knife rest [2], micromachine [D], gear drive [1], knife rest [2] is installed on the holder [4], when connecting power supply, micromachine [D] drives knife rest [2] rotation by gear drive [1], and cutter [3] cuts the pencil that inserts pen-laying hole [21], and smear metal accumulates in the smear metal collecting chamber [5], it is characterized in that: holder [4] is provided with an inside engaged gear [41] with knife rest [2] coaxial arrangement, cutter [3] adopts the sword that rolls of multitool sword, and its upper end is provided with a gear [31], this gear [31] and inside engaged gear [41] engagement.

2, according to the automatic sharpener of the pencil of claim 1, it is characterized in that: the axis of described cutter ［ 3 ］ and knife rest ［ 2 ］ center line intersect, and its angle is 9 °.