CN114683749A

CN114683749A - Electric pencil sharpener

Info

Publication number: CN114683749A
Application number: CN202011567753.2A
Authority: CN
Inventors: 毛永华
Original assignee: Yiwu Dingbang Stationery And Sporting Goods Co ltd
Current assignee: Yiwu Dingbang Stationery And Sporting Goods Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-07-01
Anticipated expiration: 2040-12-25
Also published as: CN114683749B

Abstract

The invention discloses an electric pencil sharpener, which comprises a plastic shell, a direct current motor, a pencil sharpener and a gear assembly formed by mutually meshing a plurality of gears, wherein the plastic shell comprises a scrap collecting cavity and a main machine cavity which are mutually separated through a partition plate; the top surface of the plastic shell is provided with a longitudinal pencil inserting hole which is in butt joint with the scrap collecting cavity, the pencil sharpener is longitudinally arranged in the scrap collecting cavity, and a pencil is longitudinally inserted into the pencil sharpener from the pencil inserting hole; the host machine cavity comprises a vertical area which is parallel to the chip collecting cavity from left to right and a horizontal area which is positioned above or below the chip collecting cavity; the direct current motor is longitudinally arranged in the vertical area, each gear of the gear assembly is transversely arranged in the transverse area, and a direct current motor shaft of the direct current motor is connected with the gear assembly; the gear assembly is connected with and drives the pencil sharpener; the vertical area also comprises a battery position extending longitudinally, so that the battery arranged in the vertical area is arranged along the height direction of the electric pencil sharpener; the structure of the electric pencil sharpener is more compact, the height of the electric pencil sharpener is reduced, and the volume of the electric pencil sharpener is further reduced.

Description

Electric pencil sharpener

Technical Field

The invention relates to a pencil sharpener for sharpening a pencil, in particular to an electric pencil sharpener.

Background

The pencil sharpener is a study or office article. Early pencil sharpeners included a frame with an obliquely positioned blade, into which the pencil was inserted and which was sharpened by rotating the sharpener.

At present, the pencil sharpener is commonly used, and is classified by the power for driving the pencil sharpening mechanism, and can be divided into a hand pencil sharpener and an electric pencil sharpener.

The cutter of the electric pencil sharpener is divided into a hob assembly or a pencil sharpener; the hob has a complex structure, an automatic pen feeding device needs to be configured, and the manufacturing cost is high; such as an electric pencil sharpener of CN206703798U and an electric pencil sharpener of CN201333883Y, etc.

The electric pencil sharpener is used as a stationery product for most students in audience groups, and is often required to be placed in a schoolbag and the like for carrying, so that the volume of the electric pencil sharpener is required to be as small as possible.

Disclosure of Invention

The invention aims to provide an electric pencil sharpener with a compact structure.

The technical scheme adopted by the invention for solving the technical problems is as follows: the electric pencil sharpener comprises a plastic shell, a direct current motor, a pencil sharpener and a gear assembly formed by mutually meshing a plurality of gears, wherein the plastic shell comprises a scrap collecting cavity and a main machine cavity which are mutually separated through a partition plate;

the top surface of the plastic shell is provided with a longitudinal pencil inserting hole which is in butt joint with the scrap collecting cavity, the pencil sharpener is longitudinally arranged in the scrap collecting cavity along the height direction of the electric pencil sharpener, and a pencil is longitudinally inserted into the pencil sharpener from the pencil inserting hole;

the host cavity comprises a vertical area which is parallel to the chip collecting cavity from left to right and a horizontal area which is positioned above or below the chip collecting cavity;

the direct current motor is longitudinally arranged in the vertical area, each gear of the gear assembly is transversely arranged in the transverse area, and a direct current motor shaft of the direct current motor is connected with the gear assembly; the gear assembly is connected with and drives the pencil sharpener;

the vertical area further comprises a battery position extending longitudinally, so that the battery is arranged along the height direction of the electric pencil sharpener.

The technical scheme adopted by the invention for further optimizing the technical problem is as follows: and a cabin door is arranged on the side surface of the plastic shell, corresponds to the chip collecting cavity and opens and closes the chip collecting cavity.

The technical scheme of the invention for solving the technical problems is that the cabin door is transparent or semitransparent and is connected with the side part of the plastic shell through a buckle structure.

In order to solve the above technical problems, the present invention adopts a further optimized technical solution that the gear assembly is accommodated in a flat gear box, and a dc motor shaft of the dc motor extends into the gear box and is connected with the gear assembly.

The invention adopts a further optimized technical scheme that the main machine cavity is provided with an installation part for supporting the direct current motor, the installation part and the gear box are integrally formed, and an installation groove matched with the outer contour of the direct current motor is arranged in the installation part.

The invention adopts a further optimized technical scheme that the partition plate comprises a longitudinal partition plate and a transverse partition plate, the longitudinal partition plate separates the chip collecting cavity from the vertical area of the main machine cavity, and the transverse partition plate separates the chip collecting cavity from the transverse area of the main machine cavity.

The technical scheme adopted by the invention for solving the technical problems is that the pencil sharpener further comprises a pencil feeding channel, and the pencil feeding channel is in butt joint with the pencil sharpener and the pencil inserting hole.

The plastic shell comprises a front shell and a rear shell, the front shell and the rear shell are spliced to enclose a containing area, and the chip collecting cavity and the main machine cavity are located in the containing area.

The technical scheme adopted by the invention for solving the technical problems is that a front switch is configured at the inner side of the cabin door, and the closing of the cabin door causes the conduction of the front switch; the hatch is opened to turn off the front switch.

The technical scheme for further optimizing the technical problem is that a trigger switch for starting the direct current motor is arranged on the pen inlet channel.

Compared with the prior art, the pencil sharpener disclosed by the invention has the advantages that the pencil sharpener is longitudinally arranged in the scrap collecting cavity, and the pencil is conveniently inserted from top to bottom, so that the pencil sharpener is easier and more convenient for a user to use; and, direct current motor, battery are the column structure, and the whole horizontal spreading of gear assembly, according to the shape characteristics of pencil sharpener, direct current motor, battery and gear assembly, all vertically locate direct current motor and battery position in the vertical region side by side with the collection bits chamber, transversely locate horizontal region with the gear assembly, can make the structure of electronic pencil sharpener compacter, reduce the height of electronic pencil sharpener, further reduce the volume of electronic pencil sharpener.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a perspective view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of an electric pencil sharpener of a preferred embodiment of the present invention;

FIG. 3 is an exploded view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 4 is a first internal structural view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 5 is a second internal structural view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 6 is a view of the connection of the drive assembly and the sharpener of the present invention;

FIG. 7 is a first block diagram of a sharpener mounting structure of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 8 is a second drawing illustrating the mounting structure of the sharpener of the electric pencil sharpener of the present invention;

FIG. 9 is an exploded view of a sharpener mounting structure for an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 10 is an electrical schematic view of an electric pencil sharpener according to a preferred embodiment of the present invention;

fig. 11 is a circuit diagram of an electric pencil sharpener according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-6, the electric pencil sharpener includes a plastic casing 100, a driving assembly, a battery 300, a pencil sharpener 400 and a pencil feeding channel 500, wherein the pencil feeding channel 500 extends from the inside of the plastic casing 100 to the surface of the plastic casing 100 to form a pencil insertion hole 1 on the top surface of the plastic casing 100. The pencil sharpener 400 is abutted with the pencil feeding channel 500, and a pencil is longitudinally inserted into the pencil feeding channel 500 from the pencil inserting hole 1 and enters the pencil sharpener, so that the front section of the pencil falls into the cutting area of the pencil sharpener 400.

In addition, as shown in fig. 2-5, the driving assembly includes a dc motor 201, a gear assembly 202 and an output shaft 203, the dc motor 201 drives the gear assembly 202 to rotate, the end of the gear assembly 202 is connected to the output shaft 203, and the output shaft 203 is connected to the sharpener 400. The direct current motor 201 works to drive the gear assembly 202 to rotate so as to drive the output shaft 203, and the output shaft 203 rotates to drive the pencil sharpener 400 to rotate, so that the electric pencil sharpener realizes automatic pencil sharpening under the driving of electric power, and a user sharpens a pencil more easily and conveniently.

Furthermore, the battery 300 is electrically connected to the dc motor 201 to power the dc motor 201. Preferably, the battery 300 is a disposable battery or a rechargeable battery.

As shown in fig. 2 to 6, the plastic case 100 includes a front case 100a and a rear case 100b, and the front case 100a and the rear case 100b are joined to enclose a receiving area. A chip collecting cavity 101 and a host cavity 111 which are mutually separated through a partition plate are arranged in the accommodating area; the main machine chamber 111 includes a vertical region 102 alongside the chip collection chamber 101 from the left to the right, and a lateral region 103 above or below the chip collection chamber 101.

The partition plate comprises a longitudinal partition plate 2 and a transverse partition plate 3, the longitudinal partition plate 2 separates the chip collecting cavity 101 from a vertical area 102 of the main machine cavity 111, and the transverse partition plate 3 separates the chip collecting cavity 101 from a transverse area 103 of the main machine cavity 111.

The dc motor 201 is longitudinally disposed in the vertical region 102, and each gear of the gear assembly 202 is transversely disposed in the transverse region 103. The vertical region 102 further includes a battery position J extending longitudinally so that the battery 300 is mounted in the height direction of the electric pencil sharpener, the battery position being juxtaposed to the dc motor in the left-right direction.

It should be appreciated that the pencil sharpener is longitudinally disposed in the dust collection chamber, and the pencil is conveniently inserted from top to bottom, so that the pencil sharpener is easier and more convenient for a user to use.

Moreover, the dc motor and the battery are in a columnar structure, the first-stage gear of the gear assembly needs to be vertically connected with the dc motor, and the whole gear of the gear assembly 202 is spread out along the transverse direction. According to the shape characteristics of the pencil sharpener, the direct current motor, the battery and the gear assembly, the direct current motor and the battery are longitudinally arranged in the vertical area 102 parallel to the scrap collecting cavity, and the gears of the gear assembly 202 are transversely arranged in the transverse area 103, so that the structure of the electric pencil sharpener is more compact, the height of the electric pencil sharpener is reduced, and the size of the electric pencil sharpener is further reduced.

Preferably, the transversal partition 3 is provided with a through hole T through which the sharpener 400 is docked with the output shaft 203. When the pencil sharpener 400 is installed, the pencil sharpener 400 closes the through hole, so that the space between the chip collecting cavity 101 and the main machine cavity 111 is sealed, and the chips are prevented from entering the main machine cavity and causing damage to the components in the main machine cavity.

As shown in fig. 1-5, a hatch 4 is provided on the plastic casing 100 of the plastic casing 100 corresponding to the dust collecting chamber 101, and a user can repair, clean and replace the pencil sharpener 400 by opening the hatch 4. Meanwhile, the dust collecting cavity 101 serves as a dust collecting box for collecting dust generated in the pencil sharpening process, and the cabin door 4 is arranged for facilitating the user to clean the dust.

Preferably, the hatch 4 is transparent or semi-transparent so that the user can observe the status of the dust collecting chamber 101, the condition of the pencil sharpening and the state of the pencil sharpener 400. Further preferably, the hatch 4 is connected to the side of the plastic casing 100 by means of a snap-in structure.

Further, the gear assembly 202 is accommodated in a flat gear case W, and a dc motor shaft of the dc motor 201 is extended into the gear case W to be connected to the gear assembly 202.

Moreover, the main machine cavity 111 is provided with a mounting part M for supporting the direct current motor, the mounting part M and the gear box W are integrally formed, and a mounting groove matched with the outer contour of the direct current motor is formed in the mounting part M.

Since the sharpener 400 is susceptible to wear during use, it interferes with the use of the entire electric sharpener. In the present embodiment, a mounting structure of the pencil sharpener 400 convenient for replacement is provided. Through this mounting structure, the user can change the sharpener 400 to continue to use the electric pencil sharpener with the original host, thereby saving the cost and realizing the maximum utilization of resources.

As shown in fig. 2, 3, and 7-9, the sharpener mounting structure for facilitating replacement includes a sharpener 400, a movable sleeve 600, and a support plate 700 having a pencil insertion hole 1. The output shaft of the driving assembly is located below the support plate 700. The sharpener 400 is located between the support plate 700 and the drive assembly. The pencil sharpener 400 includes a blade holder 10 and a blade 9 mounted on the blade holder 10, wherein the blade 9 is mounted on the blade holder 10 by a screw, and the blade 9 is located at a middle section of the blade holder 10.

The movable sleeve 600 is movably installed below the support plate 700 up and down with respect to the support plate 700. The bottom end of the tool rest 10 of the pencil sharpener 400 is provided with a connector 11, so that the connector is detachably connected with the driving assembly; the pen inlet end 12 at the upper end of the knife rest 10 is sleeved with the movable sleeve 600. Furthermore, the center hole of the movable sleeve 600 is abutted with the pen inserting hole 1 to form a pen feeding channel 500, and the pen feeding channel 500 is abutted with the pen feeding hole of the tool holder 10.

As shown in fig. 2 and 8, an elastic member 800 is provided between the movable sleeve 600 and the supporting plate 700. When no external force is applied, the elastic member 800 is compressed moderately, so that a downward force is applied to the movable sleeve 600, and the pencil sharpener 400 is fixed between the movable sleeve 600 and the driving assembly. When the user moves the movable sleeve 600 toward the supporting plate 700 and further compresses the elastic member 800, the movable sleeve 600 is away from the pen-feeding end 12 of the tool holder 10, so that the pen-feeding end 12 of the tool holder 10 can be separated from the movable sleeve 600. The upper end of the cartridge 10 is now free and not positionally restricted so that the user can remove the sharpener 400 from the plastic housing 100 after the removable attachment of the cartridge 10 to the drive assembly is released.

On the contrary, when the pencil sharpener 400 is mounted on the plastic casing 100, the movable sleeve 600 is moved toward the supporting plate 700, the compression amount of the elastic member 800 is increased to store energy, and then the bottom end of the tool rest 10 is connected to the driving assembly. Then, the movable sleeve 600 is released, and the compressed amount of the elastic member 800 is reduced to drive the movable sleeve 600 to move downwards, so that the movable sleeve 600 is sleeved with the pen inlet end 12 of the tool holder 10.

Preferably, the supporting plate 700 is provided with a fixing sleeve 900, the fixing sleeve 900 extends downwards from the bottom of the supporting plate 700, and one end of the movable sleeve 600 extends into the fixing sleeve 900 so as to movably connect the two.

Preferably, as shown in fig. 7, 8 and 9, the fixing sleeve 900 is assembled on the support plate 700 by a snap structure. The buckle structure comprises a hook 8 positioned at the upper end of the fixing sleeve 900 and a clamping hole 7 positioned on the support plate 700, wherein the hook 8 penetrates through the clamping hole 7 from bottom to top and is hooked on the upper surface of the support plate 700, so that the fixing sleeve 900 is connected with the support plate 700. Such an arrangement facilitates assembly between the sharpener 400, the movable sleeve 600, the elastic member 800 and the fixed sleeve 900. In the assembling process, the pencil sharpener 400, the movable sleeve 600, the elastic member 800 and the fixing sleeve 900 may be assembled together according to the mutual connection relationship, and then the fixing sleeve 900 may be fastened to the support plate 700.

Meanwhile, a limit structure for limiting the amplitude limiting movement of the movable sleeve 600 is arranged between the fixed sleeve 900 and the movable sleeve 600. The lowest position of the movable sleeve 600 moving downwards can be controlled through the limiting structure to ensure that the movable sleeve 600 keeps reasonable acting force on the cutter frame 10.

More specifically, the limiting structure comprises a first retaining ring 901 at the lower end of the fixed sleeve 900 and a second retaining ring 601 at the middle part of the movable sleeve 600, and the second retaining ring 601 is located inside the first retaining ring 901 to limit the movable sleeve 600 from separating from the fixed sleeve 900.

Moreover, in the moving process of the movable sleeve 600, the insertion part C at the upper end of the movable sleeve 600 always extends into the pen inlet channel 500, the outer surface of the peripheral side part of the movable sleeve 600, the inner surface of the peripheral side part of the fixed sleeve 900, the lower surface of the support plate 700 and the upper surface of the second retainer ring 601 of the movable sleeve 600 jointly enclose a height-variable accommodating chamber K, the elastic member 800 is installed in the accommodating chamber K, and two ends of the elastic member 800 are abutted between the support plate 700 and the second retainer ring 601. Preferably, the elastic member 800 is a spring, and the spring is coaxially sleeved outside the movable sleeve 600.

Therefore, the second retainer 601 of the movable sleeve 600 can move up and down in the area of the first retainer 901 and the support plate 700 or the restriction, and the distance of upward movement is limited by the maximum compression amount of the elastic member 800. And, the elastic member 800 generates a downward force to the movable sleeve 600 through the second retainer ring 601.

As shown in fig. 8 and 9, the pen feeding end 12 of the knife holder 10 preferably includes a planar end wall P, and the middle of the planar end wall P is provided with a connecting wall Y protruding upward. Preferably, the connecting wall Y is a wall of the pen feeding hole of the tool holder 10, and an outer contour of the connecting wall Y is matched with an inner cavity of the movable sleeve 600.

And, the lower end of the movable sleeve 600 is provided with a cavity into which the connection wall Y is inserted, and the lower end of the movable sleeve 600 is in close contact with the planar end wall P by the elastic member 800.

Further preferably, the bottom end of the knife rest 10 is provided with a bottom plate D, the center of the bottom plate D is provided with a shaft hole R, and the output shaft 203 of the driving assembly extends out of the through hole of the transverse partition plate 3 and is inserted into the shaft hole R, so that the detachable connection between the knife rest 10 and the driving assembly of the pencil sharpener 400 is realized.

Preferably, the shaft hole is a square hole, the end of the output shaft 203 is a square cylinder matched with the square hole, the square cylinder is inserted into the square hole to enable the square hole to move axially to release the connection relationship, but the square cylinder and the square hole cannot rotate radially to enable the output shaft 203 to drive the pencil sharpener 400 to rotate synchronously.

When the user opens the hatch door 4 to clean the scrap collecting cavity 101 or replace the pencil sharpener 400, the safety protection system of the electric pencil sharpener is provided in the embodiment in order to avoid potential safety hazards caused by the rotation of the pencil sharpener 400 and the cutting of the fingers of the user or the throwing of the pencil sharpener 400.

As shown in fig. 4, 10 and 11, the safety protection system includes the plastic housing 100, the dc motor 201, the battery 300, the pencil sharpener 400 and the pencil feeding channel 500. The pen inlet channel 500 is provided with a trigger switch 21 for starting the direct current motor 201, and when a pen is inserted into the pen inlet channel 500 to the trigger switch 21, the trigger switch 21 is turned on. When the pen exits the pen entry passage 500 away from the trigger switch 21, the trigger switch 21 is turned off. Moreover, a front switch 22 is configured inside the hatch 4 of the plastic casing 100, and the hatch 4 is closed to turn on the front switch 22; the hatch 4 is opened so that the front switch 22 is opened. The direct current motor 201, the battery 300, the trigger switch 21 and the front switch 22 are connected in series to form a loop. The battery 300 is connected into the circuit by a conductive member 301. That is, only when the hatch 4 is closed, the pen is inserted into the pen passage 500 to close the circuit, so that the dc motor 201 is supplied with power from the battery 300 to drive the sharpener 400.

Preferably, the trigger switch 21 and the front switch 22 are microswitches. Further preferably, a trigger rod contacting with the front switch 22 is provided at the inner side of the door 4, and when the door 4 is closed, the door 4 touches the front switch 22 through the trigger rod.

Of course, the skilled person can also arrange a controller in the electric pencil sharpener, and the trigger switch 21, the front switch 22, the dc motor 201 and the battery 300 are not connected in series, but the trigger switch 21 and the front switch 22 are connected in parallel in the circuit. However, the trigger switch 21 and the front switch 22 are both in communication with the controller, and the controller will control the dc motor 201 to operate the dc motor 201 only when the controller receives the on signals of the trigger switch 21 and the front switch 22 at the same time.

The above detailed description of the electric pencil sharpener provided by the present invention is provided, and the principle and the implementation of the present invention are explained by using specific examples, and the above description of the embodiments is only used to help the present invention and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The electric pencil sharpener is characterized by comprising a plastic shell, a direct current motor, a pencil sharpener and a gear assembly formed by mutually meshing a plurality of gears, wherein the plastic shell comprises a scrap collecting cavity and a main machine cavity which are mutually separated by a partition plate;

2. The electric pencil sharpener according to claim 1, wherein a hatch is provided on a side of the plastic housing, the hatch corresponding to the chip collecting chamber and opening and closing the chip collecting chamber.

3. The electric pencil sharpener of claim 2, wherein said compartment door is transparent or translucent and said compartment door is attached to the side of the plastic housing by a snap fit arrangement.

4. The electric pencil sharpener of claim 2 wherein said gear assembly is contained within a flat gear housing, said dc motor shaft of said dc motor extending into said gear housing for connection to said gear assembly.

5. The electric pencil sharpener of claim 4, wherein said main housing cavity has a mounting portion for supporting a DC motor, said mounting portion being integrally formed with said gear housing, said mounting portion having a mounting groove therein for mating with an outer contour of said DC motor.

6. The electric pencil sharpener of claim 1 wherein said divider plate includes a longitudinal divider plate and a transverse divider plate, said longitudinal divider plate separating said chip collecting chamber from a vertical region of said main housing chamber, said transverse divider plate separating said chip collecting chamber from a transverse region of said main housing chamber.

7. The electric pencil sharpener of claim 1 further including a pencil feed channel, said pencil feed channel interfacing said pencil sharpener and said pencil insertion hole.

8. The electric pencil sharpener of claim 1 wherein said plastic housing includes a front shell and a rear shell, said front and rear shells being joined to enclose a receiving area, said chip collecting chamber and said main body chamber being located in said receiving area.

9. The electric pencil sharpener according to claim 2, wherein a front switch is disposed inside said compartment door, said compartment door being closed to turn on said front switch; the hatch is opened to turn off the front switch.

10. The electric pencil sharpener of claim 7, wherein the pencil feeding channel is provided with a trigger switch for starting the DC motor.