CN220180456U - Pencil sharpener - Google Patents

Abstract

The utility model discloses a pencil sharpener, which comprises a housing, a fixed conveying assembly and a first pencil sharpening assembly, wherein an internal gear is arranged in the housing, the fixed conveying assembly is connected with the housing, and the first pencil sharpening assembly comprises: the knife rest is arranged in the shell, the first end of the knife rest is used for bearing the pen body, and the second end of the knife rest is rotationally connected with the shell; the transmission gear is rotationally connected with the tool rest and meshed with the internal gear so as to rotate around the axis of the tool rest when the tool rest rotates; the hob is connected with the rotating shaft, the first polishing piece is arranged on the side wall of the rotating shaft, a first polishing part is arranged on one side, far away from the rotating shaft, of the first polishing piece, and the first polishing part is used for polishing the outer circumferential surface of the pen core. According to the pencil sharpener, the outer peripheral surface of the pencil lead can be cut and polished through the first grinding part when the first grinding part moves, and the pencil lead can be cut and polished into different required shapes, so that the pencil lead does not need to be manually subjected to secondary processing.

Description

Pencil sharpener

Technical field

The present application belongs to the technical field of pencil sharpening devices, and specifically relates to a pencil sharpener.

Background technique

With the continuous development of the economy, the continuous progress of society, the continuous innovation of science and technology, and the continuous improvement of people's living standards, more and more office supplies are provided to people, and pencil sharpeners are one of many office supplies. As we all know, the emergence of pencil sharpeners provides great convenience for people to sharpen pen-shaped objects (such as pencils, eyebrow pencils, Tibetan pens, etc.), thereby saving people's time in sharpening pencils. Therefore, pencil sharpeners are becoming more and more popular. Favored by people.

Existing pencil sharpeners are composed of a shell, a pen clamping mechanism, a pencil sharpening structure and a chip box. The pen cores shaved out by this pencil sharpener are all conical, and then they can be used to write answer sheets, write Tibetan, etc. in exams. When applying an eyebrow pencil to draw eyebrows, the refill needs to be cut into a flat shape to achieve good results.

Utility model content

The purpose of this application is to provide a new technical solution for a pencil sharpener, which can at least solve the technical problem of a single shape of the pen lead cut by the existing pencil sharpener.

The pencil sharpener according to the present application includes a housing, a fixed conveying component and a first pencil sharpening component. An internal gear is provided in the housing. The fixed conveying component is connected to the housing to fix and transport the pen body. The first pencil sharpening assembly includes: a knife holder, the knife holder is installed in the housing, the first end of the knife holder is used to receive the pen body, and the second end of the knife holder is rotationally connected to the housing ; Transmission gear and rotating shaft, the transmission gear is rotationally connected to the tool holder, and the transmission gear meshes with the internal gear, so that the transmission gear rotates around its own axis when the tool holder rotates; the hob and A first grinding part, the hob is connected to the rotating shaft to cut the pen cover when the rotating shaft rotates, the first grinding part is arranged on the side wall of the rotating shaft, the first grinding part is away from the side of the rotating shaft A first polishing part is provided on one side, and the first polishing part is used for polishing the outer peripheral surface of the pen core.

Optionally, the pencil sharpener further includes: a second grinding member, the second grinding member is provided on the rotating shaft, and the second grinding member is located between the first grinding member and the transmission gear. , the second polishing part is provided with a second polishing part on one side facing the first polishing part, and the second polishing part is used to polish the pen tip of the pen core.

Optionally, the pencil sharpener further includes: an adjustment component, the rotating shaft includes: a sleeve, the sleeve is rotationally connected to the tool holder, the transmission gear, the first grinding part and the third The two grinding parts are both provided on the shaft sleeve; the shaft core is movably provided on the shaft sleeve along the axis of the shaft sleeve; the hob is provided on the first end of the shaft core, The adjustment component is provided at the second end of the shaft core to control the movement of the hob along the axis of the shaft core.

Optionally, the second end of the shaft core is provided with a connection portion, and the adjustment assembly includes: a connection sleeve, the connection sleeve is rotatably provided on the housing along the axis of the pen core, so The knife holder is installed on the first end of the connecting sleeve, and the second end of the shaft core is located in the connecting sleeve; the movable part is movably installed on the connecting sleeve along the axis of the connecting sleeve. In the connecting sleeve, the first end of the movable part is provided with a fitting part, and the connecting part is movably provided in the fitting part; the driving part is connected to the second end of the movable part. , to drive the activity of the movable parts.

Optionally, the connecting portion is formed as a bearing, the bearing is rotationally connected to the shaft core, the fitting portion is formed as a long groove, and the bearing is movable along the length direction of the groove.

Optionally, the driving member is formed as an adjusting column, a first end of the adjusting column is rotationally connected to the movable member, and a second end of the adjusting column passes through the connecting sleeve and is located on the connecting sleeve. outside, and the adjusting column is threadedly connected to the connecting sleeve.

Optionally, the first grinding member is formed as a grindstone extending in a radial direction of the rotating shaft.

Optionally, the second grinding part is formed as a circular mesa.

Optionally, the number of the transmission gear and the first grinding member is two, and they are symmetrically arranged on the tool holder.

Optionally, the pencil sharpener further includes: at least one second pencil sharpening assembly, the second pencil sharpening assembly is drivingly connected to the first pencil sharpening assembly.

According to the pencil sharpener of the present application, by disposing the first grinding part on the rotating shaft, the first grinding part can move synchronously with the rotating shaft, and when the first grinding part moves, the outer peripheral surface of the pen core can be cut by the first grinding part. Grinding can cut and grind the pen core into different required shapes, so that the pen core does not need to be manually processed for subsequent use.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is a schematic diagram of the overall structure of a pencil sharpener according to an embodiment of the present application;

Figure 2 is a schematic structural diagram of a fixed transport assembly according to an embodiment of the present application;

Figure 3 is a schematic diagram of the internal structure of a fixed transport assembly according to an embodiment of the present application;

Figure 4 is a partial structural schematic diagram of a pencil sharpener according to an embodiment of the present application;

Figure 5 is a schematic structural diagram of a first pencil sharpening assembly and an adjusting assembly according to an embodiment of the present application;

Figure 6 is a partial structural schematic diagram of a first pencil sharpener assembly according to an embodiment of the present application;

Figure 7 is an exploded view of a partial structure of the first pencil sharpener assembly according to an embodiment of the present application;

Figure 8 is a schematic structural diagram of the tool holder and adjustment assembly according to an embodiment of the present application;

Figure 9 is a schematic structural diagram of a movable component according to an embodiment of the present application;

Figure 10 is a schematic diagram of the transmission connection part between the first pencil sharpening assembly and the second pencil sharpening assembly according to an embodiment of the present application.

Reference signs:

1. Housing; 11. Internal gear;

2. Fixed conveying components;

3. The first pencil sharpening component; 31. Knife holder; 32. Transmission gear; 33. Rotating shaft; 331. Bushing; 332. Shaft core; 333. Connecting part; 34. Hob; 35. First grinding part; 351 , the first polishing part; 36. the second polishing part; 361. the second polishing part;

4. Adjustment component; 41. Connection sleeve; 42. Movable parts; 421. Fitting part; 43. Driving parts;

5. Second pencil sharpening component; 6. Pen scraps box; 7. Handle.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or element to which it refers. Must have a specific orientation, be constructed and operate in a specific orientation and therefore should not be construed as a limitation on this application. In addition, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise stated, "plurality" means two or more.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis.

The pencil sharpener according to the embodiment of the present application is first described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 10 , the pencil sharpener according to the embodiment of the present application is suitable for eyebrow pencils, pencils, Tibetan pens, etc. The pencil sharpener includes a housing 1 , a fixed conveying component 2 and a first pencil sharpening component 3 .

Specifically, the housing 1 is provided with an internal gear 11, and the fixed transport component 2 is connected to the housing 1 to fix and transport the pen body. The first pencil sharpening component 3 includes: a knife holder 31, a transmission gear 32, a rotating shaft 33, and a roller. The knife 34 and the first grinding part 35, wherein the knife holder 31 is located in the housing 1, the first end of the knife holder 31 is used to receive the pen body, the second end of the knife holder 31 is rotationally connected to the housing 1, and the transmission gear 32 is rotatably connected to the tool holder 31, and the transmission gear 32 is meshed with the internal gear 11, so that the transmission gear 32 rotates around its own axis when the tool holder 31 rotates, and the hob 34 is connected to the rotating shaft 33 to cut the pen cover when the rotating shaft 33 rotates. The first grinding part 35 is provided on the side wall of the rotating shaft 33. The first grinding part 35 is provided with a first grinding part 351 on the side away from the rotating shaft 33. The first grinding part 351 is used to grind the outer peripheral surface of the pen core.

In other words, as shown in Figures 1 to 4, the pencil sharpener according to the embodiment of the present application mainly consists of a housing 1, a pencil scraps box 6, a fixed conveying component 2 and a first pencil sharpening component 3, wherein the housing 1 An internal gear 11 is fixed on one side of the housing 1 , and the fixed conveying component 2 is movably provided on the side of the housing 1 away from the internal gear 11 to fix the pen body and transport the pen body toward the direction of the internal gear 11 .

It should be noted that, as shown in Figures 2 and 3, the fixed conveying assembly 2 can be composed of a three-claw clamping structure and a connecting piece. The connecting piece can be movably inserted into the housing 1, and the connecting piece functions to fix the conveying assembly 2. The connection with the housing 1 also plays a guiding role when the fixed conveying component 2 moves relative to the housing 1. It is the fixed conveying component 2 of the existing pencil sharpener, as long as the fixing and conveying functions of the pen body are realized. Yes, the fixed conveying component 2 can be selected according to actual needs, and will not be described again in the embodiments of this application.

Specifically, as shown in Figures 4 to 7, the pencil sharpening assembly mainly consists of a tool holder 31, a transmission gear 32, a rotating shaft 33, a hob 34 and a first grinding part 35. The tool holder 31 is located in the housing 1. The first end of the tool holder 31 faces the fixed conveying component 2 and is used to receive the pen body transported by the fixed conveying component 2. The second end of the tool holder 31 is rotationally connected to the housing 1, and its rotation axis is the same as the axis of the internal gear 11. The transmission gear 32 is rotationally connected to the tool holder 31, and the axis of the transmission gear 32 has a certain angle with the axis of the internal gear 11, which can be consistent with the inclination angle in existing pencil sharpeners, and will not be described in detail here.

As shown in Figures 4 and 5, the transmission gear 32 meshes with the internal gear 11, the hob 34 is connected with the rotating shaft 33, and the first grinding member 35 is provided on the side wall of the rotating shaft 33. Since the transmission gear 32 meshes with the internal gear 11, Therefore, when the tool holder 31 rotates, the cooperation of the transmission gear 32 and the internal gear 11 can cause the hob 34 and the first grinding member 35 to rotate around the axis of the internal gear 11 and also rotate around the axis of the rotating shaft 33. A grinding part 35 is provided with a first grinding part 351 on the side away from the rotating shaft 33. When the first grinding part 35 moves, the first grinding part 351 can cut and grind the side wall of the pen core. When the component 35 is in the position, the first grinding part 351 can grind different parts of the side wall of the pen core, so that the pen core can be cut and polished into different required shapes.

In this embodiment, the gear ratio between the transmission gear 32 and the internal gear 11 is 1:2. That is to say, the transmission gear 32 rotates around the internal gear 11 once, and the transmission gear 32 itself rotates twice, so that the first grinding part 351 can polish the two symmetrical surfaces of the outer peripheral surface of the pen core, and the pen core can be polished into a flat shape. The gear ratio of the transmission gear 32 and the internal gear 11 can be adaptively adjusted due to the different shapes of the pen core required by the use environment, which is not limited here.

Therefore, according to the pencil sharpener of the present application, by disposing the first grinding member 35 on the rotating shaft 33, the first grinding member 35 can move synchronously with the rotating shaft 33, and can pass through the first grinding part when the first grinding member 35 moves. 351 cuts and polishes different parts of the outer peripheral surface of the pen core, and the pen core can be cut and polished into different required shapes, so that the pen core does not need to be manually processed twice for subsequent use.

Optionally, the first grinding member 35 is formed as a grinding stone extending in the radial direction of the rotating shaft 33 , and the first grinding part 351 can also be formed as a rasp surface similar to a file, or can also be formed as a grinding stone surface. Specifically, the first grinding part 351 can be formed according to the pen core. material to select.

In one embodiment of the present application, the pencil sharpener further includes: a second grinding part 36, the second grinding part 36 is provided on the rotating shaft 33, and the second grinding part 36 is located between the first grinding part 35 and the transmission gear 32, The second polishing part 36 is provided with a second polishing part 361 on the side facing the first polishing part 35. The second polishing part 361 is used to polish the tip of the pen core.

That is to say, as shown in FIGS. 5 and 6 , a second grinding part 36 is provided between the first grinding part 35 and the transmission gear 32 , the second grinding part 36 is connected to the rotating shaft 33 , and the second grinding part 361 is provided on The second polishing part 36 faces the side of the first polishing part 35. The second polishing part 36 can move together with the rotating shaft 33. When the pen tip is stopped against the second polishing part 361, the second polishing part 361 can polish the pen tip. , so that the pen tip forms a certain inclined surface, which increases the contact area between the pen tip and the writing surface, thereby facilitating subsequent use.

In some specific embodiments of the present application, the second polishing part 361 is formed as a round table surface, which is easy to grind and tilt the pen tip. The inclination of the round table surface can be determined according to the required inclination of the pen tip, which will not be described again here.

Optionally, as shown in FIGS. 5 and 6 , the second grinding part 361 is formed as a beveled circular table. That is to say, the inclination of the oblique circular platform can be adjusted according to different usage requirements to change the shape of the pen head.

In some specific embodiments of the present application, the pencil sharpener also includes: an adjustment component 4, the rotating shaft 33 includes: a sleeve 331 and a shaft core 332, the sleeve 331 is rotationally connected to the tool holder 31, the transmission gear 32, the first grinding part 351 and the second grinding part 361 are both provided on the shaft sleeve 331. The shaft core 332 is movably provided on the shaft sleeve 331 along the axis of the shaft sleeve 331. The hob 34 is provided on the first end of the shaft core 332. The adjusting component 4 is provided on the shaft sleeve 331. The second end of the shaft core 332 is used to control the movement of the hob 34 along the axis of the shaft core 332 .

Specifically, as shown in Figures 6 and 7, the rotating shaft 33 is composed of a sleeve 331 and a shaft core 332. The sleeve 331 is sleeved on the shaft core 332. The outer peripheral surface of the shaft core 332 is provided with a guide portion along its axial direction. The inner side of the sleeve 331 is provided with a guide groove. The cooperation between the guide portion and the guide groove can play a role in limiting and guiding the sleeve 331 and the shaft core 332. The transmission gear 32, the first grinding part 351 and the second grinding part 361 are all fixed. Set on the shaft sleeve 331, one end of the hob 34 is fixedly connected to the first end of the shaft core 332, and the second end of the shaft core 332 is connected to an adjusting assembly 4. The adjusting assembly 4 can drive the shaft core 332 along the rotation axis 33. The axis direction moves, so that the position of the hob 34 can be adjusted, so that the hob 34 can cut pen skins of different thicknesses without cutting the pen core, thus making the pencil sharpener suitable for different types of pens. body.

In one embodiment of the present application, the second end of the shaft core 332 is provided with a connecting portion 333. The adjusting assembly 4 includes: a connecting sleeve 41, a movable member 42 and a driving member 43. The connecting sleeve 41 can be moved along the axis of the pen core. The tool holder 31 is mounted on the first end of the connecting sleeve 41, and the second end of the shaft core 332 is located in the connecting sleeve 41; the movable member 42 is movably arranged along the axis of the connecting sleeve 41. In the connecting sleeve 41, the first end of the movable member 42 is provided with a fitting part 421, the connecting part 333 is movably provided on the fitting part 421, and the driving part 43 is connected to the second end of the movable part 42 to drive the movable part 42 to move. .

That is to say, as shown in Figures 5 and 8, the adjustment assembly 4 is mainly composed of a connecting sleeve 41, a movable part 42 and a driving part 43. The connecting sleeve 41 is coaxially arranged with the internal gear 11. The connecting sleeve 41 The first end of the connecting sleeve 41 is fixedly connected to the tool holder 31, and the second end of the connecting sleeve 41 passes through the housing 1 and is rotationally connected to it. The connecting sleeve 41 can be connected to a handle 7, and the rotating handle 7 drives the tool holder 31 to rotate. Of course, The connecting sleeve 41 can also be driven to rotate through an electric drive structure, which will not be described in detail in this embodiment.

As shown in Figure 5, the movable part 42 is formed into a bump structure. The outer circumferential surface of the movable part 42 is provided with a guide groove extending along its axial direction. The inner surface of the connecting sleeve 41 is provided with a guide part. Through the guide groove and the guide part The cooperation can play a role in limiting and guiding the movable part 42. The second end of the shaft core 332 is provided with a connecting part 333, and the first side of the movable part 42 is provided with a fitting part 421 that matches the connecting part 333. Through the fitting part 421 cooperates with the connecting portion 333 to allow the core shaft to move along its own axis when the movable member 42 moves. The second side of the movable member 42 is connected to the driving member 43, and the movable member 42 can be controlled by the driving member 43 during adjustment. Activity.

Specifically, as shown in FIGS. 5 to 9 , the connecting portion 333 is formed as a bearing, and the bearing is rotationally connected to the shaft core 332 . The mating portion 421 is formed as a long groove, and the bearing is disposed in the groove and in the connecting sleeve. The axial direction of the barrel 41 will not fall from the groove, and the bearing is movable along the length direction of the groove, so that when the movable member 42 moves along the axial direction of the connecting sleeve 41, it can drive the shaft core 332 and the hob. 34 moves along the axis direction of the shaft core 332 .

As shown in Figures 1 and 5, in some specific embodiments of the present application, the driving member 43 is formed as an adjusting column. The first end of the adjusting column is rotationally connected to the movable member 42, and the second end of the adjusting column passes through the connecting sleeve. The barrel 41 is located outside the connecting sleeve 41 , and the adjusting column is threadedly connected to the connecting sleeve 41 .

In this embodiment, by rotating the adjusting column, the movable member 42 can be driven to move along the axis direction of the connecting sleeve 41. The structure is simple and easy to use.

In one embodiment of the present application, the number of the transmission gears 32 and the first grinding parts 35 is two, and they are symmetrically arranged on the tool holder 31 . That is to say, by providing multiple driving gears and the number of the second grinding members 36, the efficiency of the pencil sharpener in processing the pen core can be improved.

As shown in Figures 4 and 10, in some embodiments of the present application, the pencil sharpener also includes at least a second pencil sharpening assembly 5. The second pencil sharpening assembly 5 can have the same structure as the first pencil sharpening assembly 3. , it can also have the same structure as an ordinary pencil sharpening assembly, and the second pencil sharpening assembly 5 is drivingly connected to the first pencil sharpening assembly 3 . Here, the transmission connection can be connected through a gear set or through other transmission components, which is not limited here.

In this embodiment, by arranging multiple second pencil sharpener assemblies 5, the pencil sharpener can be applied to different types of pen bodies, further improving the applicability of the pencil sharpener.

All in all, according to the pencil sharpener of the present application, by disposing the first grinding member 35 on the rotating shaft 33, the first grinding member 35 can move synchronously with the rotating shaft 33, and can pass through the first grinding part 351 when the first grinding member 35 moves. By cutting and grinding different parts of the outer peripheral surface of the pen core, the pen core can be cut and polished into different required shapes, so that the pen core does not need to be manually processed twice for subsequent use.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A pencil sharpener, including a housing (1), a fixed conveying assembly (2) and a first pencil sharpening assembly (3). The housing (1) is provided with an internal gear (11), and the fixed conveying assembly (2) is provided with an internal gear (11). The transport component (2) is connected to the housing (1) to fix and transport the pen body, and is characterized in that the first pencil sharpening component (3) includes: Knife rest (31), the knife rest (31) is located in the housing (1), the first end of the knife rest (31) is used to receive the pen body, and the third end of the knife rest (31) The two ends are rotatably connected to the housing (1); The transmission gear (32) is rotationally connected to the rotating shaft (33) and the tool holder (31), and the transmission gear (32) meshes with the internal gear (11), so that the transmission gear (32) meshes with the internal gear (11). When the tool holder (31) rotates, the transmission gear (32) rotates around its own axis; The hob (34) is connected to the rotating shaft (33) to cut the pen cover when the rotating shaft (33) rotates. (35) is provided on the side wall of the rotating shaft (33). The first grinding part (35) is provided with a first grinding part (351) on the side away from the rotating shaft (33). The first grinding part (351) ) is used to polish the outer peripheral surface of the pen core. 2. The pencil sharpener according to claim 1, further comprising: A second grinding part (36), the second grinding part (36) is provided on the rotating shaft (33), and the second grinding part (36) is located between the first grinding part (35) and the transmission Between the gears (32), a second grinding part (361) is provided on the side of the second grinding part (36) facing the first grinding part (35), and the second grinding part (361) is used for Polish the nib of said refill. 3. The pencil sharpener according to claim 2, further comprising: an adjustment component (4), and the rotating shaft (33) includes: Shaft sleeve (331), the shaft sleeve (331) is rotationally connected to the tool holder (31), the transmission gear (32), the first grinding part (351) and the second grinding part (361) ) are located on the shaft sleeve (331); Shaft core (332), the shaft core (332) is movably provided on the shaft sleeve (331) along the axis of the shaft sleeve (331), and the hob (34) is provided on the shaft core (331). 332), the adjusting component (4) is provided at the second end of the shaft core (332) to control the movement of the hob (34) along the axis of the shaft core (332). 4. The pencil sharpener according to claim 3, characterized in that the second end of the shaft core (332) is provided with a connecting portion (333), and the adjustment assembly (4) includes: A connecting sleeve (41) is rotatably mounted on the housing (1) along the axis of the pen core, and the knife holder (31) is mounted on the connecting sleeve (41). The first end of 41), the second end of the shaft core (332) is located in the connecting sleeve (41); The movable part (42) is movably provided on the connecting sleeve (41) along the axis of the connecting sleeve (41). The first end of the movable part (42) is provided on the connecting sleeve (41). There is a fitting part (421), and the connecting part (333) is movably provided on the fitting part (421); A driving member (43) is connected to the second end of the movable member (42) to drive the movable member (42) to move. 5. The pencil sharpener according to claim 4, characterized in that the connecting part (333) is formed as a bearing, the bearing is rotationally connected to the shaft core (332), and the fitting part (421) is formed as a bearing. It is a long groove, and the bearing is movable along the length direction of the groove. 6. The pencil sharpener according to claim 4, characterized in that the driving member (43) is formed as an adjusting column, the first end of the adjusting column is rotationally connected to the movable member (42), and the The second end of the adjusting column passes through the connecting sleeve (41) and is located outside the connecting sleeve (41), and the adjusting column is threadedly connected to the connecting sleeve (41). 7. The pencil sharpener according to claim 1, wherein the first grinding member (35) is formed as a grindstone extending in a radial direction of the rotating shaft (33). 8. The pencil sharpener according to claim 2, characterized in that the second polishing part (361) is formed as a circular table surface. 9. The pencil sharpener according to any one of claims 1 to 8, characterized in that the number of the transmission gear (32) and the first grinding member (35) is two, and they are symmetrically arranged on The tool holder (31). 10. The pencil sharpener according to any one of claims 1 to 8, further comprising: At least one second pencil sharpening assembly (5) is drivingly connected to the first pencil sharpening assembly (3).