CN110171240B - A kind of mechanical pencil sharpener for English answering card scribing pen - Google Patents

Abstract

An automatic pencil sharpener for a card coating pen for English answer sheets relates to an automatic pencil sharpener. The upper end of the shell is provided with a plug bush collecting groove at the lower end of a pen inserting hole, the middle of the two clamping rods is bent to be an arc part and oppositely enclosed to form a pen clamping cavity, the clamping rods are hinged to the first connecting rod, the movable contact is fixed to the clamping rods, one end of a pressure spring is fixedly connected with the middle of the clamping rods, the other end of the pressure spring is fixedly connected with the second connecting rod, the second connecting rod is provided with a supporting rod and a fixed stationary contact, the stationary contact and the movable contact are in spaced fit, teeth are formed in the upper end of a pen sharpener seat, a bearing is sleeved and fixed in the middle of the pen sharpener seat, a vertical shaft is fixed to the motor, a gear is fixed to the upper end of the vertical shaft. The pencil can be cut into a pointed cone at one time to expose the pencil core, the pointed end of the pencil core is ground flat and widened, and the card coating efficiency of the answer sheet of the examinee is improved.

Description

A kind of mechanical pencil sharpener for English answering card scribing pen

technical field

The invention relates to an automatic pencil sharpener, in particular to an automatic pencil sharpener for English answering cards and scribing markers.

Background technique

Most of the English exams are multiple-choice questions, so most of the pages on the English answer sheet are rectangular boxes for multiple-choice questions. For example, if there are four options for a question, then there are four after the serial number corresponding to the question on the English answer sheet. Rectangular box, four options ABCD are written in the four rectangular boxes, and candidates need to use a special 2B pencil to black out the rectangular box corresponding to the correct option.

When the pencil is in use, the end of the pencil needs to be cut with a pencil sharpener, so that the refill is exposed outside the wooden barrel. However, traditional pencil sharpeners generally require manual driving, which is laborious to operate, and the pencil head is often split due to uneven force. In contrast, some electric pencil sharpeners do not have the above problems, but the current market electric pencil sharpeners The pencil cut by the pencil sharpener is the same as the pencil cut by the traditional human pencil sharpener. The cut refills are all pointed and tapered. The rectangular frame on the English answer sheet needs to be blackened with such a pencil. Repeatedly scribbling and scribbling can only black out all the rectangular boxes, which is very time-consuming and labor-intensive. In the examination room where every minute counts, the efficiency of candidates' scribbling on answer sheets directly affects their test scores. Therefore, a mechanical pencil sharpener that is convenient and quick to use and can expose the refill at one time and sharpen and widen the tip of the refill is very necessary for English test takers.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an automatic pencil sharpener for an English answering card scribing pen, which can sharpen the end of the pencil into a sharp cone to expose the pen core at one time, and smooth the tip of the pen core to widen it, so as to improve the test taker's Efficiency of answering cards.

In order to achieve the above object, the present invention adopts the following technical scheme: a kind of automatic pencil sharpener for English answering card and scribing pen, comprising a shell, a pencil sharpener, a bearing, a grinding wheel, a motor, a vertical shaft, a power supply, two clamping rods, Two connecting rods one, two compression springs, two connecting rods two and two bevel gears, the outer shape of the outer casing is a cylindrical shape with an open upper end and a closed lower end, a cover plate is fixed on the upper end of the outer casing, and the center of the cover plate is set. There is a pen insertion hole, a collection groove is inserted at the lower end of the shell, and a discharge port is set on the lower end surface of the outer shell. The center of the two clamping rods is symmetrically arranged under the pen insertion hole of the cover plate, and the middle of the two clamping rods is respectively curved to an arc shape One end of the two clamping rods is hinged with two connecting rods, the first two connecting rods are connected and fixed with the inner wall of the shell, and the two clamping rods A movable contact is respectively fixed on the outside of the other end, one end of the two compression springs is respectively fixed with the outer sides of the arc parts of the two clamping rods, and the other ends of the two compression springs are respectively fixed with the two connecting rods. The second connecting rods are connected and fixed with the inner wall of the casing, the two connecting rods are respectively fixed with support rods, the free ends of the two support rods are respectively fixed with static contacts, and the two static contacts are respectively connected with the corresponding The movable contacts are spaced together, and the pencil sharpening holder is arranged below the pencil holder, and its shape is cylindrical and has a funnel-shaped sharpening groove in the middle. The inner wall of the funnel-shaped sharpening groove is fixed with a blade, and the sharpening holder and the blade Correspondingly, there is a chip removal gap, and the upper end of the pencil sharpener base is provided with teeth along the circumferential direction. A grinding wheel is fitted at intervals below the pen knife holder, a vertical rod is fixed on the inner bottom surface of the casing, the grinding wheel is coaxially fixed with a wheel shaft and rotates through the shaft hole opened at the upper end of the vertical rod, and the motor is vertically fixed in the casing On the bottom surface, the output end of the motor is fixed with a vertical shaft, the upper end of the vertical shaft is coaxially fixed with a gear and is arranged in mesh with the teeth, one of the two bevel gears is coaxially fixed on the lower end of the vertical shaft, and the other is coaxially fixed on the grinding wheel. The outer end of the wheel shaft is meshed with the two, the power supply is fixed inside the casing, and when the two movable contacts are in close contact with the corresponding two static contacts, the power supply and the motor are connected to supply power.

Compared with the prior art, the beneficial effects of the present invention are as follows: the structure of the present invention is reasonable and effective, the arc portions of the two clamping rods enclose a pen-clamping cavity, and the pencil can be clamped and positioned under the action of the compression spring. The two clamping rods are opened to make the moving contact and the static contact in close contact, and the motor is automatically turned on. The motor can control the rotation of the pencil sharpener and the grinding wheel at the same time. The sharpener can sharpen the end of the pencil into a sharp cone and expose the refill. , The grinding wheel can smooth the tip of the refill, make the tip of the refill wider, more convenient to blacken the rectangular frame on the answer sheet at one time, and improve the efficiency of the examinee's answer sheet.

Description of drawings

Fig. 1 is the axonometric view of the overall structure of the mechanical pencil sharpener for the English answering card of the present invention;

Fig. 2 is the split structure axonometric view of the shell of the present invention;

Fig. 3 is the axonometric view of the internal structure of the present invention;

Fig. 4 is the enlarged view of A part of Fig. 3;

FIG. 5 is a schematic circuit diagram of the present invention.

Detailed ways

The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, based on the present invention The embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

Embodiment 1: As shown in Figures 1 to 5 , the present invention discloses an automatic pencil sharpener for English answering cards and stickers, comprising a casing 1 , a pencil sharpener holder 6 , a bearing 7 , a grinding wheel 8 , and a motor 9 , vertical shaft 10, power supply 12, two clamping rods 2, two connecting rods one 3, two compression springs 4, two connecting rods two 5 and two bevel gears 11, the outer shape of the casing 1 is that the upper end is open and the lower end is closed. The upper end of the outer casing 1 is fixed with a cover plate 1-1, the center of the cover plate 1-1 is provided with a pen insertion hole, the lower end of the outer casing 1 is sleeved with a collection groove 1-2, and the lower end surface of the outer casing 1 is provided with a discharge port 1-3, the center of the two clamping rods 2 is symmetrically arranged below the pen insertion hole of the cover plate 1-1, the middle of the two clamping rods 2 is respectively bent to an arc-shaped portion, and the arc-shaped portions of the two clamping rods 2 are opposite to each other. To enclose a pen clip cavity, one end of the two clamping rods 2 is hinged with two connecting rods 1 3 respectively, and the two connecting rods 1 3 are both connected and fixed with the inner wall of the housing 1, and the other ends of the two clamping rods 2 are respectively fixed with a In the movable contact 2-2, one end of the two compression springs 4 is respectively fixed to the outer sides of the arc portions of the two clamping rods 2, and the other ends of the two compression springs 4 are respectively fixed to the two connecting rods 25. The two connecting rods 5 are both connected and fixed with the inner wall of the housing 1, the two connecting rods 5 are respectively fixed with support rods 5-1, and the free ends of the two support rods 5-1 are respectively fixed with static contacts 5-2. The two stationary contacts 5-2 are spaced apart from the corresponding movable contacts 2-2. The pencil sharpener holder 6 is arranged below the pen holder, and has a cylindrical shape with a funnel-like shape running through it. The pencil sharpening groove, the inner wall of the funnel-shaped pencil sharpening groove is fixed with a blade, the pencil sharpening knife holder 6 and the blade are correspondingly provided with a chip discharge gap, and the upper end of the pencil sharpening knife holder 6 is provided with teeth 6-1 along the circumferential direction. The inner ring sleeve is fixed at the middle position of the pencil sharpener base 6, the outer ring of the bearing 7 is connected and fixed with the inner wall of the casing 1 through the positioning rod 7-1, a grinding wheel 8 is fitted at intervals under the pencil sharpener base 6, and the inner bottom surface of the casing 1 is fixed with a Vertical rods 1-5, the grinding wheel 8 is coaxially fixed with a wheel shaft and rotates through the shaft hole opened at the upper end of the vertical rod 1-5, the motor 9 is vertically fixed on the inner bottom surface of the casing 1, and the output of the motor 9 A vertical shaft 10 is fixed at the end, a gear 10-1 is coaxially fixed on the upper end of the vertical shaft 10 and is arranged in mesh with the teeth 6-1. One of the two bevel gears 11 is coaxially fixed on the lower end of the vertical shaft 10 and the other is coaxial. It is fixed on the outer end of the wheel shaft of the grinding wheel 8 and the two are meshed. The power supply 12 is fixed inside the casing 1. When the two movable contacts 2-2 are in close contact with the corresponding two static contacts 5-2, the power supply 12 It is connected to the motor 9 to supply power.

Embodiment 2: As shown in FIG. 1 , this embodiment is a further description of Embodiment 1. A triboelectric nanogenerator 13 is placed in the collection tank 1-2 and filled with a plurality of PTFE balls , the plurality of polytetrafluoroethylene balls are connected in series by a flexible wire, and the friction nanogenerator 13 can convert the vibration mechanical energy into electrical energy when cutting pencils, so that an electrostatic field is formed between the polytetrafluoroethylene balls. The sawdust and the refill powder are electrostatically adsorbed to prevent the sawdust and refill powder from being scattered around after removing the collection tank 1-2. The PTFE balls are connected in series with a flexible wire to form a strong integrity. Take out the triboelectric nanogenerator 13 to Teflon pellets can be reused after being rinsed and dried.

Embodiment 3: As shown in Figures 2 and 3, this embodiment is a further description of Embodiment 1. The inner bottom of the casing 1 is integrally formed with a protective cover 1-4, and the protective cover 1-4 covers The motor 9 and the two bevel gears 11 are set, and the corresponding positions of the protective cover 1-4 and the vertical shaft 10 and the wheel shaft of the grinding wheel 8 are respectively provided with perforations, so as to prevent wood chips and refill powder from entering between the motor 9 and the two bevel gears 11. work and play a protective role.

Embodiment 4: As shown in FIGS. 3 and 4 , this embodiment is a further description of Embodiment 1. Anti-skid rubber pads 2-1 are fixed on the inner sides of the arc-shaped portions of the two clamp bars 2 to improve the Friction against the pencil, preventing the pencil from turning.

Embodiment 5: As shown in FIG. 2 , this embodiment is a further description of Embodiment 1. The lower end of the outer wall of the casing 1 and the inner side wall of the collecting grooves 1-2 are respectively embedded and fixed with magnets 14 corresponding to each other. The collection tank 1-2 and the housing 1 can be magnetically fixed, and the installation and disassembly are simple and quick.

Referring to Figures 2 and 3, after the pencil is inserted into the casing 1 through the pen insertion hole of the cover plate 1-1, the pencil clamping cavity enclosed by the arc portions of the two clamping rods 2 clamps the pencil under the action of the compression spring 4. Positioning, the pen clip cavity is slightly smaller than the cross section of the pencil, so that the two clip rods 2 can be stretched after the pencil is inserted, the two movable contacts 2-2 are in close contact with the corresponding static contacts 5-2, and the power supply 12 It is connected to the motor 9 to supply power, and the pencil is continuously pressed down. The motor 9 drives the pencil sharpener base 6 to rotate through the gear 10-1 on the upper end of the vertical shaft 10, and the funnel-shaped sharpening groove of the pencil sharpener base 6 rotates through the blade The end of the pencil is cut, the refill is exposed outside the wooden barrel, and the wood chips and refill powder are discharged to the inner bottom of the casing 1 through the chip removal gap. The motor 9 drives the grinding wheel 8 to rotate through the two bevel gears 11, and the tip of the refill is smoothed to make the tip of the refill wider, which is more convenient to blacken the rectangular frame on the answer sheet at one time, and improve the painting quality. efficiency.

Referring to Figure 1, in order to facilitate the examinee's observation, a transparent plastic observation window can be provided at the corresponding position of the side wall of the casing 1 and the pencil sharpener base 6 and the grinding wheel 8; The upper surfaces of the arc-shaped parts of the two clamping rods 2 and the upper end surfaces of the two anti-skid rubber pads 2-1 are provided with inclined surfaces toward the center of the pen-clamping cavity; as shown in FIG. 5, a wire is passed between the two movable contacts 2-2. connected and the wire has a certain degree of slack, so that the wire will not be disconnected from the movable contact 2-2 after the two clamping rods 2 are stretched, one of the static contacts 5-2 and the motor 9, the motor 9 and the power supply 12 and between the power supply 12 and the other static contact 5-2 are also connected by wires respectively.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be implemented in other packaging forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and range of the equivalents of , are embraced within the invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. a kind of automatic pencil sharpener for English answering card smear card pen, it is characterized in that: comprise shell (1), pencil sharpener holder (6), bearing (7), grinding wheel (8), motor (9), vertical shaft (10), power supply (12), two clamping rods (2), two connecting rods (3), two compression springs (4), two connecting rods (5) and two bevel gears (11) , the outer shape of the outer casing (1) is a cylindrical shape with an open upper end and a closed lower end, a cover plate (1-1) is fixed on the upper end of the outer casing (1), and a pen insertion hole is provided in the center of the cover plate (1-1), A collection groove (1-2) is inserted into the lower end of the casing (1) and a discharge port (1-3) is provided on the lower end surface of the casing (1), and the two clamping rods (2) are centrally symmetrically arranged on the cover plate (1- 1) below the pen insertion hole, the middle of the two clamping rods (2) is respectively bent to an arc-shaped part, and the arc-shaped parts of the two clamping rods (2) face each other to form a pen-clamping cavity, and the two clamping rods (2) One end is respectively hinged with two connecting rods (3), the two connecting rods (3) are connected and fixed with the inner wall of the casing (1), and the other ends of the two clamping rods (2) are respectively fixed with movable contacts ( 2-2), one end of the two compression springs (4) are respectively fixed to the outer sides of the arc-shaped portions of the two clamping rods (2), and the other ends of the two compression springs (4) are respectively connected to the two connecting rods (5). ), the two connecting rods (5) are both connected and fixed with the inner wall of the casing (1), and the two connecting rods (5) are respectively fixed with support rods (5-1), and the two support rods ( 5-1) The free ends are respectively fixed with static contacts (5-2), and the two static contacts (5-2) are respectively matched with the corresponding movable contacts (2-2) at intervals, and the cutting The pencil sharpener seat (6) is arranged below the pen clip cavity, and has a cylindrical shape with a funnel-shaped pencil sharpening groove running through the middle. A blade is fixed on the inner wall of the funnel-shaped pencil sharpening groove. The chip removal gap, the upper end of the pencil sharpener holder (6) is provided with teeth (6-1) along the circumferential direction, the inner ring of the bearing (7) is sleeved and fixed at the middle position of the pencil sharpener holder (6), the bearing (7) ) of the outer ring is connected and fixed with the inner wall of the shell (1) through the positioning rod (7-1), a grinding wheel (8) is fitted at intervals under the pencil sharpener holder (6), and a vertical rod (1) is fixed on the inner bottom surface of the shell (1). -5), the grinding wheel (8) is coaxially fixed with a wheel shaft, and the wheel shaft rotates through the shaft hole opened at the upper end of the vertical rod (1-5), and the motor (9) is vertically fixed on the casing (1). ) inner bottom surface, the output end of the motor (9) is fixed with a vertical shaft (10), the upper end of the vertical shaft (10) is coaxially fixed with a gear (10-1), and the gear (10-1) and the teeth (6) -1) Mesh setting, one of the two bevel gears (11) is coaxially fixed on the lower end of the vertical shaft (10) and the other is coaxially fixed on the outer end of the wheel shaft of the grinding wheel (8), and the two are meshed and set, the power supply ( 12) Fixed inside the casing (1), when the two movable contacts (2-2) are in close contact with the corresponding two stationary contacts (5-2), the power supply (12) and the motor (9) are connected to Power on. 2. A kind of automatic pencil sharpener for an English answering card scribing pen according to claim 1, characterized in that: a triboelectric nanogenerator (13) is placed in the collection groove (1-2) and filled with a plurality of poly tetrafluoroethylene pellets, the plurality of polytetrafluoroethylene pellets are connected in series by flexible wires. 3. A kind of mechanical pencil sharpener for an English answering card scribing pen according to claim 1, characterized in that: the inner bottom of the casing (1) is integrally provided with a protective cover (1-4), and the protective cover ( 1-4) The cover houses the motor (9) and the two bevel gears (11), and the protective cover (1-4) is provided with perforations at the corresponding positions of the vertical shaft (10) and the wheel shaft of the grinding wheel (8). 4. A kind of mechanical pencil sharpener for English answering card scribing pen according to claim 1, is characterized in that: anti-skid rubber pads (2-1) are fixed on the inner side of the arc portion of the two clamping bars (2). ). 5. A kind of mechanical pencil sharpener for English answering card and scribing pen according to claim 1, characterized in that: the lower end of the outer wall of the casing (1) and the inner side wall of the collecting groove (1-2) are respectively embedded in each other correspondingly A magnet (14) is fixed, so that the collecting slot (1-2) and the casing (1) can be fixed by magnetic attraction.

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