Pencil sharpener with noise reduction function

Abstract

The utility model relates to the technical field of pencil sharpeners, in particular to a pencil sharpener with a noise reduction function which comprises a shell, a knife rest, a first partition plate and a driving assembly used for driving the knife rest to operate are arranged in the shell, and the driving assembly is arranged on the first partition plate. A gap is formed between the driving assembly and the shell, the knife rest is sleeved with a second partition plate, and a first noise reduction lining is arranged between the knife rest and the second partition plate. Due to the fact that the driving assembly is arranged on the first partition plate, the gap is formed between the driving assembly and the shell, the driving assembly is equivalently arranged in the shell in a suspended mode, the driving assembly does not make direct contact with the shell, the amplitude of vibration of the shell driven by vibration of the driving assembly is very small, and generated noise is greatly reduced; and the gap is formed between the driving assembly and the shell, so that noise generated by the driving assembly has a buffering process, and the intensity of the noise is greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pencil sharpeners, and in particular to a pencil sharpener with a noise reduction function. Background Art

[0002] An electric pencil sharpener is a common stationery product, which is composed of a housing component, a blade holder component, a drive component and a power supply component, etc. Among them: the blade holder component, the drive component and the power supply component are arranged in the internal space of the housing component; the drive component is composed of a motor and a gear box and other components, wherein the motor is electrically connected to the power supply component, and the gear box is connected to the motor and the blade holder component. Thus, the power of the motor is transmitted to the blade holder, driving the blade on the blade holder to rotate, and finally completing the pencil sharpening operation.

[0003] The utility model with patent number ZL202222060970.3 discloses a pencil sharpener that can automatically clamp a pencil, including a shell and a plurality of annularly distributed clamping components, the clamping component is provided with a clamping block and a spring that can give thrust to the clamping block, the clamping block is provided with a clamping rib, the shell is provided with a protective cover, the protective cover is provided with a plurality of upper support blocks corresponding to the clamping block, and the upper support blocks are slidably connected to the clamping block. The end of the pencil passes through the protective cover and is inserted into the tool holder for cutting. When the pencil passes through the clamping component, the clamping block squeezed by the pencil moves outward. At this time, the clamping ribs of the plurality of clamping blocks stick to the outer wall of the pencil, and the spring can give the clamping block an elastic pre-tightening force, so the pencil is held tightly by the plurality of clamping components, and the pencil will not rotate with the tool holder. Therefore, the user does not need to hold the pencil tightly with his hand, but only needs to gently press the pencil down with his hand until the pencil is sharpened.

[0004] When the above pencil sharpener is in use, the motor drives the knife holder to rotate. The motor generates noise when working, and the knife holder also generates certain noise due to vibration when rotating. The noise generated by the motor and the noise generated by the knife holder are superimposed on each other to form a loud noise, which brings a bad experience to the user. Utility Model Content

[0005] In view of the deficiencies or problems existing in the prior art, the present invention provides a pencil sharpener with a noise reduction function, which can significantly reduce noise.

[0006] The technical solution adopted by the present disclosure to solve the above-mentioned technical problems is: a pencil sharpener with noise reduction function, comprising a shell, a tool holder, a first partition and a driving component for driving the tool holder to operate are arranged in the shell, the driving component is arranged on the first partition, a gap is arranged between the driving component and the shell, a second partition is arranged on the outside of the tool holder, and a first noise reduction bushing is arranged between the tool holder and the second partition.

[0007] As a preferred embodiment, at least two positioning posts are provided on the first partition plate, and at least two pin shafts are provided at corresponding positions of the housing. The positioning posts and the pin shafts cooperate to connect the first partition plate to the housing. The cooperation of the positioning posts and the pin shafts limits the first partition plate at a certain height. The driving assembly is arranged on the first partition plate, which is equivalent to suspending the driving assembly in the housing. The driving assembly is not in direct contact with the housing, and the vibration generated by the driving assembly during operation is transmitted to the housing as little as possible, thus reducing noise.

[0008] As a preferred embodiment, a second noise reduction bushing for shock absorption and noise reduction is provided at the connection between the positioning post and the pin shaft.

[0009] As a preferred embodiment, the housing includes a first housing, a second housing, and a lower end cover. The first housing and the second housing are detachably connected, and the second housing and the lower end cover are detachably connected. The pin shaft is arranged on the lower end cover, and a gap is provided between the first partition plate and the inner peripheral wall of the second housing. The setting of the gap is to prevent the vibration generated by the driving assembly during operation from being transmitted to the second housing through the first partition plate, and to prevent the second housing from vibrating with the driving assembly, thereby generating noise.

[0010] As a preferred embodiment, the first partition plate is arranged below the second partition plate. The second partition plate is arranged on the second housing. A first through hole is provided on the second partition plate, and a first noise reduction bushing is arranged in the first through hole.

[0011] As a preferred embodiment, the second partition plate and the second housing are integrally formed. A first arc-shaped protrusion is provided on the upper surface of the second partition plate. An arc-shaped groove is formed between the second housing and the first arc-shaped protrusion. The width of the arc-shaped groove is adapted to the width of the lower end of the first housing, and the lower end of the first housing is arranged in the arc-shaped groove.

[0012] As a preferred embodiment, a pen feeding mechanism and a transmission assembly are provided above the tool rest. The pencil enters the tool rest through the pen feeding mechanism. The transmission assembly rotates together with the tool rest, and the rotation of the transmission assembly drives the pen feeding mechanism to work, so that the pencil can enter or exit the pen feeding mechanism.

[0013] As a preferred embodiment, a first bracket and a second bracket are arranged in the housing. The opening of the first bracket covers the opening of the second bracket. An accommodating cavity is formed after the first bracket and the second bracket are covered. The pen feeding mechanism and the transmission assembly are arranged in the accommodating cavity.

[0014] As a preferred embodiment, the housing further includes an upper end cover. A first step surface is provided on the inner peripheral wall of the upper end cover. The first bracket is provided with a first annular protrusion extending towards the inner peripheral wall of the upper end cover. The first step surface contacts the upper surface of the first annular protrusion, and the inner peripheral wall of the upper end cover abuts against the end surface of the first annular protrusion.

[0015] As a preferred embodiment, a second step surface is provided on the inner peripheral wall of the second bracket. The second step surface includes a first horizontal surface and a second horizontal surface. The first horizontal surface contacts the lower surface of the first annular protrusion, and the opening of the first bracket contacts the second horizontal surface.

[0016] As a preferred embodiment, a clamping groove is provided on the outer peripheral wall of the second bracket, and a connecting protrusion is provided on the inner peripheral wall of the first housing. The connecting protrusion cooperates with the clamping groove to connect the first housing and the second bracket.

[0017] As a preferred embodiment, a first concave structure is provided on the outer peripheral wall of the first housing. The first concave structure includes a first contact surface and a second contact surface. The upper end cover is covered on the first contact surface, and at least part of the inner peripheral wall of the upper end cover fits with the second contact surface; a second concave structure is further provided on the outer peripheral wall of the first housing. The second concave structure includes a third contact surface and a fourth contact surface. The third contact surface fits with the upper end surface of the second housing, and the fourth contact surface fits with the inner peripheral wall of the second housing.

[0018] As a preferred embodiment, a third step surface is provided on the outer peripheral wall of the second bracket, and the upper end surface of the first housing abuts against the third step surface.

[0019] Compared with existing products, since the driving component is arranged on the first partition board and there is a gap between the driving component and the housing, the driving component is equivalent to being suspended in the housing. The driving component does not directly contact the housing. The amplitude of the vibration of the driving component driving the housing to vibrate is very small, and the generated noise is also greatly reduced. Moreover, the gap between the driving component and the housing enables the noise generated by the driving component to have a buffering process, thereby greatly reducing the intensity of the noise; since a first noise reduction bushing is provided between the tool rest and the second partition board, the first noise reduction bushing can absorb or offset part of the noise, thereby reducing the noise generated by the tool rest; the noises generated by the driving component and the tool rest are effectively reduced, so the noise of the entire pencil sharpener can also be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will further describe the present application in detail with reference to the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 is one of the cross-sectional views of a pencil sharpener with a noise reduction function according to the present disclosure;

[0022] Figure 2 is the present disclosure Figure 1Partial enlarged view at A in the [document];

[0023] Figure 3 is the disclosure Figure 1 Partial enlarged view at B in the [document];

[0024] Figure 4 is the second cross-sectional view of a pencil sharpener with a noise reduction function in the disclosure;

[0025] Figure 5 is the disclosure Figure 4 Partial enlarged view at C in the [document];

[0026] Figure 6 is the structural schematic diagram of the first housing in the disclosure;

[0027] Figure 7 is the structural schematic diagram of the second housing in the disclosure;

[0028] Figure 8 is the structural schematic diagram of the first partition in the disclosure;

[0029] Figure 9 is the structural schematic diagram of the lower end cover in the disclosure;

[0030] Figure 10 is the structural schematic diagram of the first bracket in the disclosure;

[0031] Figure 11 is the first structural schematic diagram of the second bracket in the disclosure;

[0032] Figure 12 is the second structural schematic diagram of the second bracket in the disclosure.

[0033] Explanation of reference numerals:

[0034] 1. First partition; 2. First noise reduction bushing; 3. Second housing; 4. First housing; 5. Lower end cover; 6. Second bracket; 7. Upper end cover; 8. First bracket; 9. Second partition; 10. Knife rest; 11. Card slot; 12. Connecting protrusion; 13. First arc-shaped protrusion; 14. First annular protrusion; 15. Driving assembly; 16. Pen feeding mechanism; 17. First transmission gear; 18. Second transmission gear; 19. First contact surface; 20. Second contact surface; 21. Fourth contact surface; 22. First through hole; 23. Positioning post; 24. Pin shaft; 25. First horizontal surface; 26. Second horizontal surface; 27. Third step surface. Detailed implementation manners

[0035] In order to enable those skilled in the art to better understand the technical solutions of the disclosure, the following provides a detailed, clear, and complete description of the disclosure in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the disclosure and are not used to limit the disclosure.

[0036] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0037] Please refer to Figures 1-5 As shown, the present disclosure provides a pencil sharpener with a noise reduction function, including a housing. The housing is generally cylindrical. A knife holder 10, a first partition 1, and a driving assembly 15 for driving the knife holder 10 to operate are arranged inside the housing. The driving assembly 15 is arranged on the first partition 1, and there is a gap between the driving assembly 15 and the housing. A second partition 9 is sleeved outside the knife holder 10, and a first noise reduction bushing 2 is arranged between the knife holder 10 and the second partition 9. In this embodiment, the driving assembly 15 is a motor, and the motor drives the knife holder 10 to rotate. The setting of the second partition 9 limits and fixes the knife holder 10, making the knife holder 10 more stable during operation. Since the motor is arranged on the first partition 1 and there is a gap between the driving assembly 15 and the housing, the driving assembly 15 is equivalent to being suspended in the housing. The motor is not in direct contact with the housing, and the amplitude of the vibration of the driving assembly 15 driving the housing to vibrate is very small, and the generated noise is also greatly reduced. Moreover, the gap between the motor and the housing allows the noise generated by the motor to have a buffering process, thereby greatly reducing the intensity of the noise; since there is a first noise reduction bushing 2 between the knife holder 10 and the second partition 9, the first noise reduction bushing 2 can absorb or isolate part of the noise, thereby reducing the noise generated by the knife holder 10; the noise generated by the driving assembly 15 and the knife holder 10 is effectively reduced, so the noise of the entire pencil sharpener can also be greatly reduced.

[0038] It should be noted that the first noise reduction bushing 2 is made of rubber. Rubber is elastic, has a certain strength and toughness, and has a low cost. The first noise reduction bushing 2 made of rubber is sleeved outside the knife holder 10 and can absorb and offset part of the noise when the knife holder 10 rotates. When the knife holder 10 rotates, the first noise reduction bushing 2 can rotate with it or not rotate.

[0039] Please refer to together Figure 8 and Figure 9As shown in the figure, further, three positioning posts 23 are provided on the first partition plate 1, and three pin shafts 24 with hollow structures are provided at corresponding positions of the housing. The positioning posts 23 are located in the pin shafts 24, and the cooperation between the positioning posts 23 and the pin shafts 24 is used to connect the first partition plate 1 and the housing. Preferably, the height of the positioning posts 23 is lower than the height of the pin shafts 24. The positioning posts 23 are located in the pin shafts 24, and the lower ends of the positioning posts 23 do not contact the bottom of the housing. When the tool rest 10 rotates, it will inevitably cause vibrations of the first partition plate 1 and the positioning posts 23 provided on the first partition plate 1. Since the lower ends of the positioning posts 23 do not contact the bottom of the housing, part of the vibrations are prevented from being transmitted from the positioning posts 23 to the bottom of the housing, thus reducing the noise to a certain extent. The cooperation between the positioning posts 23 and the pin shafts 24 limits the first partition plate 1 at a certain height. The motor is provided on the first partition plate 1, which is equivalent to suspending the motor in the housing. The motor is not in direct contact with the housing, so that the vibrations generated by the drive assembly 15 during operation are transmitted to the housing as little as possible, thereby reducing the noise. As a preference, a rubber bushing for shock absorption and noise reduction is provided at the connection between the positioning posts 23 and the pin shafts 24.

[0040] Please refer to Figures 1-3 , Figure 7 and Figure 9 As shown in the figure, in an embodiment of the present disclosure, the housing includes a first housing 4, a second housing 3 and a lower end cover 5. The first housing 4 is detachably connected to the second housing 3, and the second housing 3 is detachably connected to the lower end cover 5, such as: snap connection or plug connection or connection by bolts. The pin shaft 24 is provided on the lower end cover 5, and a gap is provided between the first partition plate 1 and the inner peripheral wall of the second housing 3. The gap is provided to prevent the vibrations generated by the motor during operation from being transmitted to the second housing 3 through the first partition plate 1, avoiding the second housing 3 vibrating with the motor and thus generating noise. The first partition plate 1 is provided below the second partition plate 9. The second partition plate 9 is provided on the second housing 3 and is integrally formed with the second housing 3. A first through hole 22 is provided on the second partition plate 9, and a first noise reduction bushing 2 is provided in the first through hole 22.

[0041] Further, a first arc-shaped protrusion 13 is provided on the upper surface of the second partition plate 9. An arc-shaped groove is formed between the second housing 3 and the first arc-shaped protrusion 13. The width of the arc-shaped groove is adapted to the width of the lower end of the first housing 4. The lower end of the first housing 4 is provided in the arc-shaped groove. The first housing 4 is equivalent to being plugged into the second housing 3. Such a setting not only facilitates the disassembly and installation of the first housing 4, but more importantly, at the connection between the first housing 4 and the second housing 3, there is a thickness of two layers of the housing (the thickness of the first housing 4 and the thickness of the second housing 3), which enables the noise generated by the tool rest 10 located inside to be well isolated, so that the noise heard by the user outside is relatively small.

[0042] Such as Figure 4 and Figure 5As shown in the figure, a pen feeding mechanism 16 and a transmission assembly are provided above the tool rest 10. The pencil enters the tool rest 10 through the pen feeding mechanism 16. The transmission assembly rotates together with the tool rest 10. The rotation of the transmission assembly drives the pen feeding mechanism 16 to work, and the pencil can enter or exit the pen feeding mechanism 16. Specifically, the transmission assembly includes a first transmission gear 17 and a second transmission gear 18. The first transmission gear 17 is arranged between the tool rest 10 and the second transmission gear 18. The first transmission gear 17 rotates together with the tool rest 10. The second transmission gear 18 rotates coaxially together with the first transmission gear 17. The pen feeding mechanism 16 is arranged on the second transmission gear 18. It should be noted that the pen feeding mechanism 16 in this application is prior art and will not be elaborated here.

[0043] Furthermore, a first bracket 8 and a second bracket 6 are arranged inside the housing. The opening of the first bracket 8 covers the opening of the second bracket 6. After the first bracket 8 and the second bracket 6 are covered, a receiving cavity is formed. The pen feeding mechanism 16 and the transmission assembly are arranged in the receiving cavity. Since the pen feeding mechanism 16 and the transmission assembly will generate a certain amount of noise during operation, arranging the pen feeding mechanism 16 and the transmission assembly in the receiving cavity can well enclose the noise generated by the two in the receiving cavity, so that the sound heard by the user outside can be reduced. Arranging the pen feeding mechanism 16 and the transmission assembly in the receiving cavity can also achieve a good noise reduction effect.

[0044] As Figure 1 、 Figures 10-12 shown in the figure, even further, the housing further includes an upper end cover 7. A first stepped surface is arranged on the inner peripheral wall of the upper end cover 7. The first bracket 8 is provided with a first annular protrusion 14 extending towards the inner peripheral wall of the upper end cover 7. The first stepped surface contacts the upper surface of the first annular protrusion 14, and the inner peripheral wall of the upper end cover 7 abuts against the end surface of the first annular protrusion 14. The setting of the first stepped surface makes the wall thickness of the upper part of the upper end cover 7 thicker than that of the lower part. The thinner wall thickness of the lower part of the upper end cover 7 reserves space for the first housing 4 and the second bracket 6. Preferably, a second stepped surface is arranged on the inner peripheral wall of the second bracket 6. The second stepped surface includes a first horizontal surface 25 and a second horizontal surface 26. The first horizontal surface 25 contacts the lower surface of the first annular protrusion 14, and the opening of the first bracket 8 contacts the second horizontal surface 26. It can be seen that there is more than one contact surface between the first bracket 8 and the second bracket 6, and the parts where the first bracket 8 and the second bracket 6 contact have a thicker wall thickness. Such a setting is to enable the noise generated by the pen feeding mechanism 16 and the transmission assembly in the receiving cavity to be buffered and offset to a greater extent, so as to achieve the purpose of eliminating and reducing noise. In addition, both the first bracket 8 and the second bracket 6 have contact surfaces with the upper end cover 7, which not only strengthens the connection strength between the components but also plays a good role in further reducing noise.

[0045] As Figure 6 、 Figure 11 andFigure 12 As shown, preferably, a clamping groove 11 is provided on the outer peripheral wall of the second bracket 6, and a connecting projection 12 is provided on the inner peripheral wall of the first housing 4. The connecting projection 12 cooperates with the clamping groove 11 to connect the first housing 4 and the second bracket 6. A third stepped surface 27 is provided on the outer peripheral wall of the second bracket 6, and the upper end surface of the first housing 4 abuts against the third stepped surface 27. The upper end surface of the first housing 4 abuts against the second bracket 6, and the lower end of the first housing 4 is inserted into the second housing 3, so that the chamber where the tool rest 10 is located is in a relatively closed state, so as to achieve the purpose of isolating noise.

[0046] Particularly, a first concave structure is provided on the outer peripheral wall of the first housing 4. The first concave structure includes a first contact surface 19 and a second contact surface 20. The upper end cover 7 is covered on the first contact surface 19, and at least part of the inner peripheral wall of the upper end cover 7 is attached to the second contact surface 20. In this way, at least two layers of "housings" are provided outside the pen feeding mechanism 16 and the transmission assembly. The thickest part is three layers (the second bracket 6, the first housing 4 and the upper end cover 7). In this way, the sealing performance can be further ensured, so that the noise generated by the pen feeding mechanism 16 and the transmission assembly can be well blocked inside the housing, and the noise heard by the user is very small. A second concave structure is also provided on the outer peripheral wall of the first housing 4. The second concave structure includes a third contact surface and a fourth contact surface 21. The third contact surface is attached to the upper end surface of the second housing 3, and the fourth contact surface 21 is attached to the inner peripheral wall of the second housing 3, so that the noise generated by the tool rest 10 can be well isolated.

[0047] In this application, the tool rest 10, the transmission assembly and the motor are not in direct contact with the housing. The motor is suspended on the first partition 1, and the tool rest 10 is connected to the second partition 9 through the first noise reduction bushing 2, so that the pencil sharpener has a good noise reduction effect. Compared with the existing electric pencil sharpener, the noise can be reduced by at least ten decibels.

[0048] The above has introduced this application in detail. Specific examples are used in this article to elaborate on the principle and implementation mode of this application. The description of the above embodiments is only used to help understand this application and the core idea. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A pencil sharpener with noise reduction function, characterized in that, It includes a housing, in which a tool holder (10), a first partition (1), and a drive assembly (15) for driving the tool holder (10) to operate are provided. The drive assembly (15) is arranged on the first partition (1), and there is a gap between the drive assembly (15) and the housing. A second partition (9) is sleeved outside the tool holder (10), and a first noise reduction bushing (2) is arranged between the tool holder (10) and the second partition (9).

2. The pencil sharpener with noise reduction function according to claim 1, wherein At least two positioning posts (23) are arranged on the first partition (1), and at least two pin shafts (24) are arranged at corresponding positions of the housing. The positioning posts (23) and the pin shafts (24) cooperate to connect the first partition (1) to the housing; a second noise reduction bushing for shock absorption and noise reduction is arranged at the connection of the positioning post and the pin shaft.

3. The pencil sharpener with noise reduction function according to claim 2, characterized in that, The housing includes a first housing (4), a second housing (3), and a lower end cover (5). The first housing (4) is detachably connected to the second housing (3), and the second housing (3) is detachably connected to the lower end cover (5). The pin shaft (24) is arranged on the lower end cover (5), and there is a gap between the first partition (1) and the inner peripheral wall of the second housing (3); the first partition (1) is arranged below the second partition (9), the second partition (9) is arranged on the second housing (3), and a first through hole (22) is arranged on the second partition (9), and the first noise reduction bushing (2) is arranged in the first through hole (22).

4. The pencil sharpener with noise reduction function according to claim 3, characterized in that, The second partition (9) is integrally formed with the second housing (3). A first arc-shaped protrusion (13) is arranged on the upper surface of the second partition (9). An arc-shaped groove is formed between the second housing (3) and the first arc-shaped protrusion (13). The width of the arc-shaped groove is adapted to the width of the lower end of the first housing (4), and the lower end of the first housing (4) is arranged in the arc-shaped groove.

5. The pencil sharpener with noise reduction function according to claim 3, characterized in that, An ink feeding mechanism (16) and a transmission assembly are arranged above the tool holder (10). The pencil enters the tool holder (10) through the ink feeding mechanism (16). The transmission assembly rotates together with the tool holder (10), and the rotation of the transmission assembly drives the ink feeding mechanism (16) to work. The pencil can enter or exit the ink feeding mechanism (16).

6. The pencil sharpener with noise reduction function according to claim 5, characterized in that, A first bracket (8) and a second bracket (6) are arranged in the housing. The opening of the first bracket (8) covers the opening of the second bracket (6). An accommodating cavity is formed after the first bracket (8) and the second bracket (6) are covered. The ink feeding mechanism (16) and the transmission assembly are arranged in the accommodating cavity.

7. The pencil sharpener with noise reduction function according to claim 6, characterized in that, The housing further includes an upper end cover (7). A first stepped surface is arranged on the inner peripheral wall of the upper end cover (7). The first bracket (8) is provided with a first annular protrusion (14) extending towards the inner peripheral wall of the upper end cover (7). The first stepped surface contacts the upper surface of the first annular protrusion (14), and the inner peripheral wall of the upper end cover (7) abuts against the end surface of the first annular protrusion (14).

8. The pencil sharpener with a noise reduction function according to claim 7, characterized in that, A second stepped surface is arranged on the inner peripheral wall of the second bracket (6). The second stepped surface includes a first horizontal surface (25) and a second horizontal surface (26). The first horizontal surface (25) contacts the lower surface of the first annular protrusion (14), and the opening of the first bracket (8) contacts the second horizontal surface (26).

9. The pencil sharpener with noise reduction function according to claim 6 or 8, characterized in that A clamping groove (11) is provided on the outer peripheral wall of the second bracket (6), and a connecting projection (12) is provided on the inner peripheral wall of the first housing (4). The connecting projection (12) cooperates with the clamping groove (11) to connect the first housing (4) and the second bracket (6).

10. The pencil sharpener with noise reduction function according to claim 7, characterized in that, A first concave structure is provided on the outer peripheral wall of the first housing (4). The first concave structure includes a first contact surface (19) and a second contact surface (20). The upper end cover (7) is covered on the first contact surface (19), and at least part of the inner peripheral wall of the upper end cover (7) is attached to the second contact surface (20). A second concave structure is further provided on the outer peripheral wall of the first housing (4). The second concave structure includes a third contact surface and a fourth contact surface (21). The third contact surface is attached to the upper end surface of the second housing (3), and the fourth contact surface (21) is attached to the inner peripheral wall of the second housing (3).

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