CN217476958U

CN217476958U - Hand-held rotary pencil sharpener

Info

Publication number: CN217476958U
Application number: CN202221350422.8U
Authority: CN
Inventors: 王天一; 姜波
Original assignee: Beijing Xintang Sichuang Educational Technology Co Ltd
Current assignee: Beijing Xintang Sichuang Educational Technology Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-09-23
Anticipated expiration: 2032-05-30

Abstract

The disclosure relates to the technical field of office stationery, and provides a handheld rotary pencil sharpener, which comprises an upper shell and a base; the upper shell is covered on the base and forms a containing cavity together with the base, and the upper shell can rotate around the center line of the upper shell relative to the base; a clamping component, a transmission component and a pencil sharpening tool are sequentially arranged in the accommodating cavity from top to bottom; the clamping assembly is used for clamping a pencil and can synchronously rotate along with the base or the upper shell; the transmission assembly is connected with the clamping assembly and can drive the clamping assembly to rotate when the upper shell rotates relative to the base; the upper shell, the clamping assembly, the transmission assembly and the pencil sharpening cutter are respectively and correspondingly provided with a station for inserting a pencil along the vertical direction. This hold rotation type and cut a ware only twists epitheca and base through manual forward or reverse when using, alright realize cutting the pencil or the function of taking out, have convenient to use laborsaving, compact structure be convenient for accomodate the advantage of carrying.

Description

Hand-held rotary pencil sharpener

Technical Field

The disclosure relates to the technical field of office stationery, in particular to a handheld rotary pencil sharpener.

Background

The pencil sharpener is a common stationery for study and office in our life, and the common pencil sharpener on the market has two types, one type is a small sharpener only containing a blade type, although the structure is small and exquisite, the pencil sharpener needs larger rotating torque when in use, is harder for children to use and has certain potential safety hazard; the other type is a large pencil sharpener with a rocker, and the pencil sharpener of the type is safe and labor-saving to use, but has a huge overall structure, and is not beneficial to daily storage or carrying of students.

Therefore, there is a need for a pencil sharpener that can be used in a labor-saving manner and can be conveniently carried and stored.

SUMMERY OF THE UTILITY MODEL

To address the above technical problems, or at least partially to address the above technical problems, the present disclosure provides a hand-held rotary sharpener.

The handheld rotary pencil sharpener provided by the present disclosure comprises an upper housing and a base;

the upper shell is covered on the base and forms a containing cavity together with the base, and the upper shell can rotate around the center line of the upper shell relative to the base;

the pen sharpening device comprises a cavity, a clamping assembly, a transmission assembly and a pencil sharpening tool, wherein the clamping assembly, the transmission assembly and the pencil sharpening tool are sequentially arranged in the cavity from top to bottom;

the clamping assembly is used for clamping a pencil and can synchronously rotate along with the base or the upper shell;

the transmission assembly is connected with the clamping assembly and can drive the clamping assembly to rotate when the upper shell rotates relative to the base;

the upper shell, the clamping assembly, the transmission assembly and the pencil sharpening cutter are respectively provided with a station for inserting pencils in the vertical direction.

In one possible design, the clamping assembly includes:

the first rotating shaft and the second rotating shaft are arranged in parallel at intervals along the horizontal direction, both ends of the first rotating shaft and the second rotating shaft are rotatably connected to the inner wall of the upper shell, and a clamping roller is fixedly arranged on each shaft wall;

the two clamping rollers correspondingly form a clamping station for clamping a pencil;

the transmission assembly can drive the first rotating shaft and the second rotating shaft to rotate reversely at the same time so as to drive the two clamping rollers to rotate reversely.

In a possible design, the roll surface of the clamping roll is arranged to be an arc surface which is concave towards the middle of the clamping roll, and the arc surface is provided with a resistance-increasing structure.

In one possible design, the transmission assembly includes:

the transmission plate is provided with an annular tooth groove on one side facing the clamping assembly;

the first transmission tooth is positioned on one side, facing the clamping component, of the transmission plate and meshed with the annular tooth groove;

the second transmission gear is positioned on one side, facing the clamping component, of the transmission plate and is meshed with the annular tooth groove;

the first transmission gear and the second transmission gear are centrosymmetric about the center of the transmission plate, one of the first transmission gear and the second transmission gear is fixedly arranged on the first rotating shaft, and the other one of the first transmission gear and the second transmission gear is fixedly arranged on the second rotating shaft.

In a possible design, the transmission plate is fixedly arranged on the base, and a threading station for threading a pencil is arranged at the center of the transmission plate;

the pencil sharpening cutter is fixedly arranged on one side, away from the clamping component, of the transmission plate;

the pencil sharpening tool is also provided with a pencil sharpening station opposite to the threading station.

In a possible design, the bottom wall of the base is also provided with a detachable bottom cover;

the bottom cover and the transmission assembly enclose a collecting cavity for collecting scraps.

In one possible design, one of the base and the upper shell is provided with a socket part, and the other is provided with a bearing part;

when the upper shell covers the base, the sleeve joint part is sleeved on the bearing part and can rotate around the central line of the bearing part in the vertical direction.

In one possible design, one of the circumferential surfaces of the sleeve joint part and the bearing part which are mutually abutted is provided with a convex clamping edge, and the other circumferential surface is provided with a concave clamping groove;

when the upper shell covers the base, the convex clamping edges are correspondingly and movably embedded in the concave clamping grooves.

In one possible design, the top center of the upper shell is provided with a through hole which is concave downwards;

the top wall of the upper shell extends downwards to form a cylinder passage which is communicated with the through hole correspondingly.

In one possible design, a holding part for holding by a user is arranged on the peripheral wall of the upper shell and/or the peripheral wall of the base;

the surface of the holding part is also provided with a resistance-increasing structure.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the handheld rotary pencil sharpener provided by the embodiment of the disclosure comprises an upper shell and a base; the upper shell is covered on the base and forms a containing cavity together with the base, and the upper shell can rotate around the center line of the upper shell relative to the base; a clamping component, a transmission component and a pencil sharpening tool are sequentially arranged in the accommodating cavity from top to bottom; the clamping assembly is used for clamping a pencil and can synchronously rotate along with the base or the upper shell; the transmission assembly is connected with the clamping assembly and can drive the clamping assembly to rotate when the upper shell rotates relative to the base; the upper shell, the clamping assembly, the transmission assembly and the pencil sharpening cutter are respectively and correspondingly provided with a station for inserting a pencil along the vertical direction. This hold rotation type and cut a ware only twists epitheca and base through manual forward or reverse when using, alright realize cutting the pencil or the function of taking out, have convenient to use laborsaving, compact structure and be convenient for accomodate the advantage of carrying.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a perspective view of a hand-held rotary sharpener according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a hand-held rotary sharpener provided by embodiments of the present disclosure;

FIG. 3 is a partial sectional view of a hand-held rotary sharpener according to one embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a housing of a grip-type rotary sharpener according to an embodiment of the present disclosure;

fig. 5 is a vertical cross-sectional view of a hand-held rotary sharpener provided by embodiments of the present disclosure.

Reference numerals: 1. an upper shell; 11. a clamping assembly; 111. a first rotating shaft; 112. a second rotating shaft; 113. a grip roller; 12. a socket joint part; 121. a recessed clamping groove; 13. a through hole; 2. a base; 21. a transmission assembly; 211. a drive plate; 211a, an annular tooth slot; 212. a first drive tooth; 213. a second transmission gear; 22. a pencil sharpener; 23. a receiving part; 231. a raised clamping edge; 24. a bottom cover.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Referring to fig. 1, 2 and 5, a handheld rotary sharpener according to an embodiment of the present disclosure includes an upper housing 1 and a base 2; the upper shell 1 covers the base 2 and encloses a containing cavity together with the base 2, and the upper shell 1 can rotate around the center line of the upper shell relative to the base 2; wherein, a clamping component 11, a transmission component 21 and a pencil sharpener 22 are sequentially arranged in the cavity from top to bottom; the clamping component 11 is used for clamping a pencil and can synchronously rotate along with the base 2 or the upper shell 1; the transmission assembly 21 is connected with the clamping assembly 11 and can drive the clamping assembly 11 to rotate when the upper shell 1 rotates relative to the base 2; the upper shell 1, the clamping component 11, the transmission component 21 and the pencil sharpening tool 22 are respectively and correspondingly provided with stations for inserting pencils in the vertical direction.

When the handheld rotary pencil sharpener is used, one end of a pencil sequentially penetrates through a station of an upper shell 1, a station of a clamping component 11 and a station of a transmission component 21 from top to bottom and then reaches a station of a pencil sharpening cutter 22, then a user respectively holds the upper shell 1 and a base 2 by two hands and screws reversely, so that the upper shell 1 can rotate by a certain angle alpha around the central line of the upper shell relative to the base 2, at the moment, the transmission component 21 enables the clamping component 11 to enter a driving state, the pencil is clamped by the clamping component 11 and conveyed downwards, and the transmission component 21 can synchronously drive the clamping component 11 to rotate around the central line of the upper shell 1, so that the actual motion state of the pencil is spiral downwards, and one end of the pencil can enter the pencil sharpening station of the pencil sharpening cutter 22 to sharpen the pencil; after the pencil is cut, the user reversely screws the upper shell 1 and the base 2 with both hands to enable the upper shell 1 to rotate a certain angle-alpha around the center line of the upper shell relative to the base 2, at the moment, the clamping component 11 enters the driving state again and drives the pencil to move upwards, and at the moment, the transmission component 21 can synchronously drive the clamping component 11 to reversely rotate around the center line of the upper shell 1, so that the actual moving state of the pencil is reversely screwed upwards, and the pencil after the pencil is cut can be withdrawn from the handheld rotary pencil sharpener.

It should be noted that, since the size specification of the handheld rotary pencil sharpener depends on the actual size specification of the upper casing 1 and the base 2, the size specification of the upper casing 1 and the base 2 can be set as small as possible on the premise of satisfying the torque for holding and screwing by both hands of a child and the installation space of the internal cavity.

In conclusion, compare with traditional small-size pencil sharpener or hand formula pencil sharpener, the handheld rotation type pencil sharpener that this disclosure embodiment provided only twists epitheca 1 and base 2 through manual forward or reverse twist, alright realize cutting the pencil or the function of taking out, have convenient to use laborsaving, compact structure and accomodate the advantage of carrying conveniently.

In some embodiments, the clamping assembly 11 further includes a first rotating shaft 111 and a second rotating shaft 112; the first rotating shaft 111 and the second rotating shaft 112 are respectively arranged in parallel along the horizontal direction at intervals, both ends of the first rotating shaft and the second rotating shaft are rotatably connected to the inner wall of the upper shell 1, and a clamping roller 113 is respectively and fixedly arranged on the respective shaft wall; the two clamping rollers 113 correspondingly form a clamping station for clamping the pencil; the transmission assembly 21 can simultaneously drive the first rotating shaft 111 and the second rotating shaft 112 to rotate in opposite directions, so as to drive the two clamping rollers 113 to rotate in opposite directions.

Specifically, as shown in fig. 2 and 3, the clamping assembly 11 is specifically configured as a first rotating shaft 111 and a second rotating shaft 112 which are spaced in parallel, and clamping rollers 113 are respectively and fixedly disposed on respective shaft walls to form clamping stations for clamping the pencil, so that when the first rotating shaft 111 and the second rotating shaft 112 are driven by the transmission assembly 21 to rotate in opposite directions, the two clamping rollers 113 can rotate in two opposite directions simultaneously, thereby realizing the function of stably clamping the pencil to move up or down.

Moreover, the two ends of the first rotating shaft 111 and the second rotating shaft 112 are hinged to the side walls of the upper case 1, so that on one hand, the first rotating shaft 111 and the second rotating shaft 112 cannot axially move when rotating, and on the other hand, the clamping assembly 11 can be installed inside the upper case 1, and when the upper case 1 rotates relative to the base 2 in the vertical direction, the clamping assembly 11 can synchronously rotate relative to the base 2 in the vertical direction.

The specific arrangement mode of the clamping assembly 11 has the advantages of simple structure and capability of stably clamping the pencil to move up or down.

It should be noted that the above-mentioned clamping assembly 11 may be configured as a clamping roller with only one rotating shaft, and a driven matching roller is correspondingly disposed on the roller surface of the clamping roller, and the rotating shaft drives the clamping roller to actively rotate, or the above-mentioned function of clamping the pencil to move up or down may also be used.

In some specific embodiments, the roll surface of the nip roll 113 is provided as an arc surface that is concave toward the middle of the nip roll 113, and the resistance increasing structure is provided on the arc surface.

Specifically, as shown in fig. 3, the surface of the nip roller 113 is set to be an arc surface recessed toward the middle of the nip roller 113, so that two nip rollers 113 arranged opposite to each other can form a nip station having a shuttle-shaped cross section. And the resistance-increasing structure is further additionally arranged on the arc-shaped surface, so that the clamping stability of the pencil of the clamping roller 113 can be further improved, and the pencil is prevented from sliding up and down in a clamping station.

It should be noted that the resistance-increasing structure may be a rubber pad attached to the arc-shaped surface or a friction pattern integrally formed with the arc-shaped surface, and the grip roller 113 may also be made of a rubber material having a certain elasticity and an excellent friction resistance.

In some embodiments, the drive assembly 21 includes a drive plate 211, a first drive tooth 212, and a second drive tooth 213; one side of the transmission plate 211 facing the clamping component 11 is provided with an annular tooth groove 211 a; the first driving teeth 212 are located on a side of the driving plate 211 facing the clamping assembly 11 and engaged with the annular teeth grooves 211 a; the second driving teeth 213 are located on a side of the driving plate 211 facing the clamping assembly 11 and engaged with the annular teeth grooves 211 a; the first transmission gear 212 and the second transmission gear 213 are centrosymmetric with respect to the center of the transmission plate 211, and one is fixedly disposed on the first rotating shaft 111, and the other is fixedly disposed on the second rotating shaft 112.

Specifically, as shown in fig. 3, the transmission assembly 21 is specifically configured to be a transmission plate 211 and a first transmission tooth 212 and a second transmission tooth 213 that are perpendicular to the transmission plate 211, and the annular tooth groove 211a in the upper surface of the transmission plate 211 can be engaged with the first transmission tooth 212 and the second transmission tooth 213, respectively, because the first transmission tooth 212 and the second transmission tooth 213 are centrosymmetric with respect to the center of the transmission plate 211, when the transmission plate 211 rotates relative to the holding assembly 11, the first transmission tooth 212 and the second transmission tooth 213 can rotate in different directions, thereby achieving the function of driving the first rotating shaft 111 and the second rotating shaft 112 to rotate in two opposite directions.

And in order that the annular teeth slot 211a does not generate motion interference with the first driving teeth 212 and the second driving teeth 213, the extending direction of each sub-tooth slot in the annular teeth slot 211a is set to have an inclination angle with the radial direction of the driving plate 211.

The specific arrangement mode of the transmission assembly 21 has the advantages of simple structure and stable transmission.

It should be understood that the transmission assembly 21 may be configured in other configurations, for example, a bevel gear ring is disposed on the upper plate surface of the transmission plate 211, the first transmission gear 212 and the second transmission gear 213 are respectively configured as bevel gears adapted to mesh with the transmission plate 211, and when the transmission plate 211 rotates relative to the clamping assembly 11, the first transmission gear 212 and the second transmission gear 213 also rotate in different directions.

In some specific embodiments, the driving plate 211 is fixedly disposed on the base 2, and a threading station for threading the pencil is disposed in the center of the driving plate 211; the pencil sharpener 22 is fixedly arranged on one side of the transmission plate 211, which is far away from the clamping component 11; wherein the pencil sharpening tool 22 is further provided with a pencil sharpening station opposite to the threading station.

Specifically, as shown in fig. 2 and 5, the transmission plate 211 is fixedly arranged on the base 2, and the pencil sharpener 22 is fixedly arranged on the side of the transmission assembly 21 away from the clamping assembly 11, so that on one hand, the number of middle parts of the base 2 can be increased, the weight of the lower half part of the handheld rotary pencil sharpener is increased, the center of gravity of the handheld rotary pencil sharpener is reduced, and the stability of the handheld rotary pencil sharpener when the handheld rotary pencil sharpener is vertically placed is improved; in addition, according to the habit of most users, when the hand-held rotary type pencil sharpener is used, most users have the habit that the user holds the base 2 with the left hand and fixes the base, and holds the upper casing 1 with the right hand and rotates the upper casing 1 by screwing, so that the weight of the upper casing 1 is not increased by the driving plate 211 and the pencil sharpener 22 fixedly arranged in the base 2, and the user can screw the upper casing 1 more easily.

In some particular embodiments, the bottom wall of the base 2 is also provided with a removable bottom cover 24; the bottom cover 24 and the transmission assembly 21 enclose a collection chamber for collecting the waste chips.

Specifically, as shown in fig. 4 and 5, a detachable bottom cover 24 is disposed at the bottom wall of the base 2, and the bottom cover 24 and the transmission assembly 21 can define a collecting chamber for collecting the waste, so that the waste generated when the user holds the rotary sharpener with his hand can be stored in the collecting chamber, and when the waste is stored in a certain amount, the bottom cover 24 can be opened to pour out the waste together with the waste.

The bottom cover 24 can further improve the use convenience of the handheld rotary pencil sharpener.

In some specific embodiments, one of the base 2 and the upper shell 1 is provided with a socket 12, and the other is provided with a socket 23; when the upper shell 1 is covered on the base 2, the sleeve-joint part 12 is sleeved on the bearing part 23 and can rotate around the central line of the bearing part 23 in the vertical direction.

Specifically, as shown in fig. 4, the sleeve 12 is disposed at the lower shell wall of the upper shell 1, and the receiving portion 23 is disposed at the upper shell wall of the base 2, so that when the upper shell 1 covers the base 2, the sleeve 12 can be movably sleeved on the receiving portion 23, and when the upper shell 1 rotates relative to the base 2 in the vertical direction, the sleeve 12 can rotate around the vertical direction along the receiving portion 23.

The sleeve joint part 12 and the bearing part 23 have the advantages of simple structure and capability of stably realizing movable sleeve joint of the upper shell 1 and the base 2.

Of course, the receiving portion 23 may be provided on the lower casing wall of the upper casing 1, and the engaging portion 12 may be provided on the upper casing wall of the base 2.

In some specific embodiments, one of the circumferential surfaces of the socket part 12 and the socket part 23 abutting against each other is provided with a convex clamping edge 231, and the other is provided with a concave clamping groove 121; when the upper shell 1 is covered on the base 2, the protruding clamping edge 231 is correspondingly and movably embedded in the recessed clamping groove 121.

Specifically, as shown in fig. 4, the concave card slot 121 is disposed on the inner peripheral wall of the socket 12, and the convex card edge 231 is disposed on the outer peripheral wall of the socket 23, and in order not to affect the rotation of the socket 12 along the socket 23 in the vertical direction, the convex card edge 231 and the concave card slot 121 should be disposed in a ring shape.

Through the arrangement of the recessed clamping groove 121 and the raised clamping edge 231, when the sleeve-joint part 12 is movably sleeved on the bearing part 23, the raised clamping edge 231 is correspondingly inserted into the recessed clamping groove 121, so that the sleeve-joint part 12 and the bearing part 23 can form a clamping connection in the vertical direction, and the stable covering function of the upper shell 1 and the base 2 is realized.

Of course, the protruding locking edge 231 may be disposed on the inner peripheral wall of the socket 12, and the recessed locking groove 121 may be disposed on the outer peripheral wall of the receiving portion 23, and a plurality of sets of the protruding locking edge 231 and the recessed locking groove 121 may be disposed correspondingly, so as to further improve the stability of the cover of the upper housing 1 and the base 2.

In some specific embodiments, the top center of the upper case 1 is provided with a through hole 13 depressed downward; the top wall of the upper shell 1 extends downwards to form a cylinder passage which is communicated with the through hole 13 correspondingly.

Specifically, as shown in fig. 4 and 5, a through hole 13 which is recessed downward is formed in the center of the top of the upper casing 1, and the top wall of the upper casing 1 extends downward to form a barrel channel which is communicated with the through hole 13, so that the through hole 13 and the barrel channel can correspondingly form a threading station for threading a pencil, and the through hole 13 can be specifically set to be a tapered hole with a gradually reduced aperture from top to bottom; the barrel channel can wrap the pencil, so that the pencil can vertically descend in the threading process.

In some specific embodiments, the peripheral wall of the upper case 1 and/or the peripheral wall of the base 2 are provided with a holding portion for a user to hold; the surface of the holding part is also provided with a resistance-increasing structure.

The holding part can be specifically set to be a concave structure matched with the width of the palm, the resistance-increasing structure on the surface of the holding part can also be specifically set to be the rubber gasket or the silica gel gasket, the holding part and the resistance-increasing structure are arranged on the outer peripheral wall of the upper shell 1 and/or the outer peripheral wall of the base 2, a user can further conveniently hold and screw the upper shell 1 and/or the base 2, and the hand-held rotary pencil sharpener can be used in a more labor-saving mode.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hand-held rotary sharpener, comprising:

a base (2);

the upper shell (1) covers the base (2) and forms a containing cavity together with the base (2), and the upper shell (1) can rotate around the central line of the upper shell relative to the base (2);

wherein, a clamping component (11), a transmission component (21) and a pencil sharpener (22) are sequentially arranged in the cavity from top to bottom;

the clamping assembly (11) is used for clamping a pencil and can synchronously rotate along with the base (2) or the upper shell (1);

the transmission assembly (21) is connected with the clamping assembly (11) and can drive the clamping assembly (11) to rotate when the upper shell (1) rotates relative to the base (2);

the pencil sharpener is characterized in that the upper shell (1), the clamping assembly (11), the transmission assembly (21) and the pencil sharpening cutter (22) are respectively and correspondingly provided with stations for pencils to penetrate in the vertical direction.

2. The hand-held rotary sharpener of claim 1, wherein said clamp assembly (11) comprises:

the first rotating shaft (111) and the second rotating shaft (112) are arranged in parallel at intervals along the horizontal direction, both ends of the first rotating shaft and the second rotating shaft are rotatably connected to the inner wall of the upper shell (1), and a clamping roller (113) is fixedly arranged on each shaft wall;

the two clamping rollers (113) correspondingly form a clamping station for clamping a pencil;

the transmission assembly (21) can drive the first rotating shaft (111) and the second rotating shaft (112) to rotate reversely at the same time so as to drive the two clamping rollers (113) to rotate reversely.

3. The hand-held rotary sharpener of claim 2, wherein the surface of the pinch roller (113) is configured as an arcuate surface that is concave toward the center of the pinch roller (113), and wherein a drag enhancing structure is provided on the arcuate surface.

4. The hand-held rotary sharpener of claim 2, wherein the transmission assembly (21) comprises:

the transmission plate (211) is provided with an annular tooth groove (211a) towards one side of the clamping assembly (11);

a first driving tooth (212) located on a side of the driving plate (211) facing the clamping assembly (11) and engaged with the annular tooth groove (211 a);

a second driving tooth (213) located on a side of the driving plate (211) facing the clamping assembly (11) and engaged with the annular tooth groove (211 a);

the first transmission gear (212) and the second transmission gear (213) are centrosymmetric with respect to the center of the transmission plate (211), and one is fixedly arranged on the first rotating shaft (111) and the other is fixedly arranged on the second rotating shaft (112).

5. The hand-held rotary sharpener of claim 4, wherein the transmission plate (211) is fixedly arranged on the base (2), and a threading station for threading a pencil is arranged in the center of the transmission plate (211);

the pencil sharpening cutter (22) is fixedly arranged on one side, away from the clamping component (11), of the transmission plate (211);

the pencil sharpening tool (22) is also provided with a pencil sharpening station opposite to the threading station.

6. The hand-held rotary sharpener of claim 1, wherein the bottom wall of said base (2) is further provided with a removable bottom cover (24);

the bottom cover (24) and the transmission component (21) enclose a collecting cavity for collecting waste scraps.

7. The hand-held rotary sharpener of claim 1, wherein one of the base (2) and the upper housing (1) is provided with a socket (12) and the other is provided with a socket (23);

when the upper shell (1) covers the base (2), the sleeve-joint part (12) is sleeved on the bearing part (23) and can rotate around the central line of the bearing part (23) in the vertical direction.

8. The hand-held rotary sharpener according to claim 7, wherein one of the circumferential surfaces of the socket part (12) and the receiving part (23) abutting against each other is provided with a convex catching edge (231), and the other is provided with a concave catching groove (121);

when the upper shell (1) covers the base (2), the protruding clamping edges (231) are correspondingly and movably embedded in the recessed clamping grooves (121).

9. A hand-held rotary sharpener as claimed in any one of claims 1 to 8, characterised in that the top centre of the upper shell (1) is provided with a downwardly concave through hole (13);

the top wall of the upper shell (1) extends downwards to form a cylinder passage which is communicated with the through hole (13) correspondingly.

10. A hand-held rotary sharpener according to any one of claims 1 to 8, characterised in that a grip portion is provided on the peripheral wall of the upper housing (1) and/or the peripheral wall of the base (2) for gripping by a user;

and the surface of the holding part is also provided with a resistance-increasing structure.