Pencil feeding mechanism and pencil sharpener

Abstract

The pencil feeding mechanism comprises a pencil feeding part, a supporting part and a self-adaption part, a through pencil feeding hole is formed in the center of the pencil feeding mechanism, a pencil can sequentially pass through the pencil feeding part, the self-adaption part and the supporting part to enter the pencil sharpener and complete cutting, and the self-adaption part is contained between the pencil feeding part and the supporting part.

Description

Technical Field

[0001] The utility model relates to the field of stationery and file parts, in particular to a pen feeding mechanism and a pencil sharpener. Background Art

[0002] Since its advent, pencil sharpeners have brought great changes to pencil cutting. People no longer need to use utility knives to cut pencils. The use of pencil sharpeners makes pencil sharpening convenient and safe. From the cutting process of existing pencil sharpeners, whether automatic or hand-cranked, the pen feeding speed is mainly determined by the shape of the conical inner cavity on the knife holder and the rolling speed of the pen feeding mechanism. During the cutting process, the pen feeding mechanism is linked with the hob, and at the same time, an inward force is applied to the cut pen, pushing the pen into the conical inner cavity while cutting. Since the contact surface between the hob and the cut pencil is constantly changing during the cutting process, the force applied by the hob to the pencil is completely different as the cutting progresses. If the pen feeding mechanism keeps feeding the pencil inward at a constant speed, the pen feeding speed and the pencil sharpening speed will inevitably be inconsistent. It may happen that the cutting has been completed and the pen tip can no longer move downward, but the pen feeding mechanism is still feeding the pen downward, resulting in over-cutting, which in turn leads to broken pens. Not only is it a waste of resources, but it is also impossible to complete the pencil sharpening well. The sharpened pencil lead will be stuck in the hob and the pencil sharpener, causing damage to the machine. There are currently some solutions to the above problems, such as the shrapnel clutch mechanism disclosed in CN217124382U. The problem with this structure is that the strength of the plastic shrapnel is relatively low, and its structure and material together determine that the component will change significantly with different temperatures. When the temperature is high, the elasticity will decrease, and when the temperature is low, the elasticity will increase, which will affect the force of advancing and retracting the pen and affect the effect of sharpening the pen. At the same time, if the friction position of this type of shrapnel is not sealed well, when pencil powder falls in, the lubrication effect of the pencil powder will affect the friction coefficient of the friction area, which will also affect the force of advancing and retracting the pen. In addition to the shrapnel clutch mechanism, there is also an integrated design of the clutch friction wheel and the clamping pen wheel. This integrated design structure easily leads to the rubber hardness of the friction wheel position and the clamping wheel position cannot be taken into account at the same time, which is not conducive to adjusting the force of advancing and retracting the pen and the force of clamping the pen at the same time. At the same time, because the friction wheel position and the clamping wheel position are on the same part, when the clamping wheel position is rolled like a pencil, the soft rubber material will be squeezed, and the squeezed rubber material will move toward the friction wheel position, thereby affecting the size of the friction force of the friction wheel, especially when clamping pencils of different diameters. Utility Model Content

[0003] The purpose of the utility model is to provide a pen feeding mechanism, which can realize stable pen feeding and retracting, and improve cutting stability by adaptively adjusting the pen sharpening speed and the pen feeding speed. The utility model has a simple structure, strong adaptability and is easy to implement. A pencil sharpener is also proposed, which adopts the above-mentioned pen feeding mechanism for cutting.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A pencil sharpener feeding mechanism comprises: a pen feeding part, a support part and an adaptive part. The center of the pen feeding mechanism comprises a through pen feeding hole. A pencil can sequentially pass through the pen feeding part, the adaptive part and the support part to enter the interior of the pencil sharpener and complete cutting. The adaptive part is accommodated between the pen feeding part and the support part. The adaptive part comprises: a bracket, a clutch, a clamping wheel and a clamping wheel shaft. The bracket comprises a cavity structure. At least a part of the clamping wheel shaft is rotatably accommodated in the cavity structure. The clutch and the clamping wheel are both sleeved on the clamping wheel shaft. There are two matching states between the clutch and the clamping wheel shaft:

[0006] When V1=V2, the clutch and the clamping axle rotate synchronously;

[0007] When V1≠V2, slippage occurs between the clutch and the clamping axle;

[0008] Among them, V1 is the pen feeding speed; V2 is the pen sharpening speed.

[0009] Furthermore, there are at least two adaptive parts.

[0010] Furthermore, the clutch member includes a friction wheel and a power input wheel.

[0011] Furthermore, the friction wheel and the power input wheel are both sleeved on the clamping wheel axle.

[0012] Furthermore, the friction wheel and the power input wheel can rotate synchronously.

[0013] Furthermore, the inner surface of the power input wheel is in sliding contact with the outer surface of the clamping wheel shaft.

[0014] Furthermore, the inner surface of the friction wheel is in friction contact with the outer surface of the clamping wheel shaft.

[0015] Furthermore, the friction wheel is made of elastic material.

[0016] Furthermore, the power input wheel is a gear structure.

[0017] Furthermore, the clamping wheel axle includes a second shaft segment and a third shaft segment, and the diameters of the second shaft segment and the third shaft segment are different.

[0018] Furthermore, the power input wheel is sleeved on the second shaft section, and the friction wheel is sleeved on the third shaft section.

[0019] Furthermore, the clamping wheel axle also includes a fourth shaft segment, and the clamping wheel is fixedly sleeved on the fourth shaft segment.

[0020] Furthermore, the number of the adaptive parts is three.

[0021] A pencil sharpener comprises the above-mentioned pen feeding mechanism, a shell, a motor and a cutter. The pen feeding mechanism, the motor and the cutter are accommodated in the shell. The pencil sharpener is configured so that a pencil can enter the cutter through the pen feeding mechanism to complete cutting.

[0022] Preferably, by selecting a temperature-resistant soft rubber material similar to rubber for the friction wheel, constant friction and clamping force can be maintained at different temperatures, and the friction can be protected from the influence of temperature changes.

[0023] The utility model provides a pen feeding mechanism and a pencil sharpener, which have the following beneficial effects compared with the prior art:

[0024] Through the structural design of the adaptive part, when the pen feeding speed and the pencil sharpening speed are inconsistent, the inner surface of the friction wheel and the outer surface of the clamping wheel shaft begin to slip, thereby realizing the clutch of the pen feeding and retracting. The adaptive part and the clamping wheel are independent of each other, which is convenient for the adaptive part and the clamping wheel to use different materials or hardness to independently adjust the friction force and the clamping force. At the same time, by utilizing the elastic characteristics of the soft rubber of the friction wheel and the matching structure of the friction wheel and the clamping wheel shaft, the inner hole surface of the friction wheel is always close to the outer surface of the clamping wheel shaft, so that the friction area always maintains a tight sealing state, and impurities such as pencil powder cannot enter the area where the friction wheel contacts the clamping wheel shaft, and the friction force can always be kept constant, thereby ensuring a constant force of feeding and retracting the pen. At the same time, by selecting a rubber-like soft rubber material with temperature resistance for the friction wheel, the friction force and the clamping force can always be kept stable at different temperatures. In addition, the adaptive part is an independent component as a whole, which can be matched with other components of the pen feeding mechanism of any pencil sharpener, and has strong adaptability.

[0025] The principle and structure of the structure are simple, the cost is low, the stability and reliability are strong, and the adaptability is strong, which effectively solves the problems of unstable advance and retreat of the pencil and poor cutting effect of the current pencil sharpener. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above technical content of the utility model and the following specific implementation methods will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection. In the accompanying drawings, the same reference numerals represent the same or similar elements.

[0027] Figure 1 It is a schematic diagram of the exploded view of the clutch mechanism;

[0028] Figure 2 It is a three-dimensional schematic diagram of the clamping wheel;

[0029] Figure 3 It is a three-dimensional schematic diagram of the clamping axle;

[0030] Figure 4 It is a three-dimensional schematic diagram of the friction wheel;

[0031] Figure 5 It is a three-dimensional schematic diagram of the friction wheel;

[0032] Figure 6 It is a three-dimensional schematic diagram of the worm gear;

[0033] Figure 7 It is a three-dimensional schematic diagram of the bracket;

[0034] Figure 8 is a schematic diagram of the flip surface of the bracket;

[0035] Fig. 9 It is a schematic diagram of the clutch mechanism combination;

[0036] Fig.10 It is a three-dimensional schematic diagram of a clutch member in another embodiment;

[0037] Fig.11 This is the exploded diagram of the mechanism.

[0038] The reference numerals are described as follows:

[0039] Pen feeding: 100

[0040] Support: 200

[0041] Adaptive part: 300

[0042] Clamping axle: 310

[0043] First shaft section: 311

[0044] Second shaft section: 312

[0045] The third shaft section: 313

[0046] Fourth axis section: 314

[0047] Fifth axis section: 315

[0048] The first boss of the shaft section: 316

[0049] Second boss of shaft section: 317

[0050] Clamping wheel: 320

[0051] Clamping wheel hole: 321

[0052] Clamping wheel end face: 322

[0053] Clamping wheel outer surface: 323

[0054] Friction wheel holes: 332

[0055] Friction wheel end face: 333

[0056] Friction wheel outer surface: 334

[0057] First assembly: 335

[0058] Power input wheel hole: 337

[0059] Power input gear teeth: 338

[0060] Second assembly: 339

[0061] Worm gear: 350

[0062] Worm segment: 351

[0063] Worm column head: 352

[0064] - Bracket: 360

[0065] First bracket hole: 361

[0066] Second bracket hole: 362

[0067] Third bracket hole: 363

[0068] Accommodation cavity: 364

[0069] Clutch: 330; 330'

[0070] Friction wheel: 331; 331'

[0071] Power input wheel: 336; 336' DETAILED DESCRIPTION

[0072] The detailed features and advantages of the present invention are described in detail in the specific implementation modes below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. According to the description, claims and drawings disclosed in this specification, the technical personnel in this field can easily understand the relevant purposes and advantages of the present invention.

[0073] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0074] In the description of this embodiment, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships that are defined with reference to the coordinates of the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0076] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0077] Example 1

[0078] Figure 1 It is an exploded view schematic diagram of the pen feeding mechanism, which includes, from top to bottom in the figure: a clamping wheel 320, a clamping wheel axle 310, a friction wheel 331, a power input wheel 336, a worm gear 350 and a bracket 360, wherein the bracket 360 is a semi-open cavity structure bracket, so that the clamping wheel 320, the clamping wheel axle 310, the friction wheel 331, the power input wheel 336, and the worm gear 350 can be accommodated in the bracket 360.

[0079] Figure 2 3D is a schematic diagram of a clamping wheel. The clamping wheel 320 is cylindrical in shape. The center of the clamping wheel 320 includes a clamping wheel hole 321, which is a through hole. The clamping wheel 320 is sleeved with the clamping wheel shaft 310 through the clamping wheel hole 321. The outer surface of the cylinder includes a clamping wheel peripheral surface 323, and a clamping wheel end surface 322 perpendicular to the axial direction. Optionally, the clamping wheel 320 is made of soft rubber material. The clamping wheel 320 applies pressure to the pencil through the clamping wheel peripheral surface 323 to achieve clamping. It is easy to understand that the use of soft rubber material can achieve more stable clamping of the pencil and can adapt to pencils of different shapes.

[0080] Figure 3 It is a three-dimensional schematic diagram of a clamping axle. The clamping axle 310 shown in the figure is a stepped axle, which includes, from bottom to top in the figure, a first shaft segment 311, a second shaft segment 312, a third shaft segment 313, a fourth shaft segment 314, and a fifth shaft segment 315, wherein the first shaft segment 311, the second shaft segment 312, and the third shaft segment 313 are concentrically arranged with their diameters increasing successively, a first shaft segment boss 316 is included between the third shaft segment 313 and the fourth shaft segment 314, a second shaft segment boss 317 is included between the fourth shaft segment 314 and the fifth shaft segment 315, the first shaft segment boss 316 and the second shaft segment boss 317 are larger in diameter than the adjacent shaft segments, and the adjacent components are separated by the first shaft segment boss 316 and the second shaft segment boss 317.

[0081] Figure 4It is a three-dimensional schematic diagram of the friction wheel. The friction wheel 331 is cylindrical as a whole. The outer periphery of the friction wheel 331 includes a friction wheel outer peripheral surface 334, a friction wheel end surface 333 perpendicular to the axis, and a friction wheel hole 332 in the center. The friction wheel hole 332 is a through hole structure. The friction wheel 331 is sleeved with the clamping wheel shaft 310 through the friction wheel hole 332. The friction wheel end surface 333 also includes a first assembly part 335.

[0082] Optionally, the first assembly parts 335 are evenly distributed on the periphery of the friction wheel hole 332; optionally, the number of the first assembly parts 335 is 5, and the first assembly parts 335 are assembly hole structures.

[0083] Figure 5 It is a three-dimensional schematic diagram of the power input wheel 336. As shown in the figure, the power input wheel 336 is a gear structure as a whole, including a power input wheel hole 337 at the center and power input wheel teeth 338 on the periphery, wherein a second assembly part 339 is provided on the end face close to the friction wheel 331, and the second assembly part 339 can cooperate with the first assembly part 335. Through the cooperation of the two, the friction wheel 331 and the power input wheel 336 are assembled together, thereby realizing power transmission at the same speed.

[0084] It is easy to understand that when the first assembly part 335 is an assembly hole structure, in order to cooperate with the first assembly part 335, the second assembly part 339 is columnar, and the sizes of the second assembly part 339 and the first assembly part 335 can be adapted to each other.

[0085] Figure 6 It is a three-dimensional schematic diagram of a worm member. In the figure, the worm member 350 includes a worm segment 351 and a worm column head 352 from top to bottom. The worm segment 351 cooperates with the power input gear 338 to realize power transmission from the worm member 350 to the clutch member 330.

[0086] Figure 7 It is a three-dimensional schematic diagram of a bracket, wherein the bracket 360 includes a receiving cavity 364 , and two ends of the bracket 360 respectively include a first bracket hole 361 and a second bracket hole 362 .

[0087] Figure 8 3 is a schematic diagram of the flip surface of the bracket. As shown in the figure, the bottom surface of the bracket 360 also includes a third bracket hole 363.

[0088] The first shaft section 311 and the fifth shaft section 315 of the two end shaft sections of the clamping wheel axle 310 are matched with the first bracket hole 361 and the second bracket hole 362 respectively, and the worm column head 352 is matched with the third bracket hole 363.

[0089] Fig. 9 It is a schematic diagram of the clutch mechanism combination. Figures 1 to 9It can be seen that the overall assembly form of the clutch mechanism 300 is as follows: the clamping wheel 320, the clamping wheel shaft 310, the friction wheel 331, the power input wheel 336, and the worm member 350 are accommodated in the cavity 364, the friction wheel 331 is sleeved on the third shaft segment 313, the power input wheel 336 is sleeved on the second shaft segment 312, the clamping wheel 320 is sleeved on the fourth shaft segment 314, and then the first shaft segment 311 is matched with the first bracket hole 361, the fifth shaft segment 315 is matched with the second bracket hole 362, and the worm column head 352 of the worm member 350 is matched with the third bracket hole 363, and the worm segment 351 is matched with the power input gear teeth 338. After the above matching, the assembly of the adaptive part 300 is completed.

[0090] Example 2

[0091] Fig.10 3 is a schematic three-dimensional diagram of the clutch member 330 ′ in Embodiment 2. In this embodiment, the friction wheel 331 ′ and the power input wheel 336 ′ are designed as one piece.

[0092] The working principle of the adaptive part is as follows:

[0093] The power input wheel 336 is axially connected to the second shaft section 312 through the power input wheel hole 337, and the power input wheel hole 337 can slide relative to the second shaft section 312. The friction wheel 331 is frictionally connected to the third shaft section 313 on the clamping wheel shaft through the friction wheel hole 332. The clamping wheel 320 is fixedly connected to the fourth shaft section 314 through the clamping wheel hole 321.

[0094] When the power input wheel 336 starts to rotate under the drive of the worm member 350, it drives the friction wheel 331 to rotate synchronously at the same time. When the friction wheel 331 rotates, the friction between the friction wheel hole 331 and the outer surface of the third shaft section 313 drives the entire clamping wheel shaft 310 to rotate, and the clamping wheel shaft 310 drives the clamping wheel 320 to rotate. When the clamping wheel 320 rotates, it drives the pencil to move forward and backward. When the pen-feeding speed V1 and the pencil-sharpening speed V2 are inconsistent, slippage will occur between the inner surface of the friction wheel and the outer surface of the third shaft section, and the friction wheel can no longer drive the clamping wheel shaft 310 to rotate synchronously through friction, and is in an idling state. It is easy to understand that since the friction wheel no longer drives the clamping wheel shaft 310 to rotate synchronously, the clamping wheel 320 does not rotate at this time, and then the pencil no longer moves forward and backward at this time, thereby realizing the clutch of the pen moving forward and backward.

[0095] The force of the pen moving forward and backward can be adjusted by adjusting the friction between the inner surface of the friction wheel 331 and the outer surface of the third shaft section 313 .

[0096] The friction area uses soft rubber material to keep the interference fit between the clamping wheel shaft 310 tightly sealed at all times, and impurities such as pencil powder cannot enter the friction area, so that a constant friction force can be maintained at all times, thereby ensuring a constant pen advance and retreat force.

[0097] Specifically, by selecting a temperature-resistant soft rubber material similar to rubber for the friction wheel, constant friction and clamping force can be maintained at different temperatures, and the friction can be protected from the influence of temperature changes.

[0098] The working principle of the pen feeding mechanism is as follows:

[0099] like Fig.11 As shown, the pencil sequentially enters the adaptive part 300 and the supporting part 200 through the hole in the center of the pen entry part 100, and finally enters the position of the cutting tool (not shown in the figure) to achieve cutting.

[0100] The adaptive part 300 is an independent component, and can be assembled with any matching pen-introduction part 100 and support part 200, and has strong adaptability. The adaptive part 300 can be assembled relative to the pen-introduction part 100 and / or support part 200 in the form of fixed connection, rotation, twisting, etc.

[0101] Optionally, the adaptive part 300 can be fixed between the pen insertion part 100 and the support part 200. It is easy to understand that since the clamping wheel 320 is made of soft elastic material, the adaptive part 300 can adapt to the outer contour of various pencils.

[0102] Optionally, the adaptive portion 300 can rotate relative to the pen insertion portion 100 and / or the support portion 200. Fig.11 A structure in which the components of a pen-feeding mechanism rotate relative to each other is schematically shown. In this structure, the pen-feeding part 100 is a turntable with an arc-shaped groove on its surface. The worm column head 352 of the adaptive part 300 is matched with the arc groove to realize the rotation of the adaptive part 300 relative to the pen-feeding part 100. A tension spring can also be introduced into this structure to connect the worm column head 352 with another preset fixed structure to provide a pre-tightening force for the adaptive part 300. The support part 200 can simply support the adaptive part 300 to provide support force, or a groove structure, a turntable structure, etc. can be introduced to cooperate with the rotation of the adaptive part 300. The adaptive part 300 is designed to be rotatably mounted in the pen-feeding mechanism, so that the outer contour of the pencil can be more widely adapted.

[0103] Industrial Applicability

[0104] In summary, the utility model provides an adaptive part and a pencil sharpener. Through the structural design of the adaptive part, when the pen feeding speed and the pen sharpening speed are inconsistent, the inner surface of the friction wheel and the outer surface of the clamping wheel shaft begin to slip, thereby realizing the clutch of the pen feeding and retracting. The adaptive part and the clamping wheel are independent of each other, which is convenient for the adaptive part and the clamping wheel to use different materials or hardness to independently adjust the magnitude of the friction force and the clamping force. At the same time, by utilizing the elastic properties of the soft rubber of the friction wheel and the matching structure of the friction wheel and the clamping wheel shaft, the inner hole surface of the friction wheel is always tightly attached to the outer surface of the clamping wheel shaft, so that the friction force area always maintains a tight sealing state, and impurities such as pencil powder cannot enter the area where the friction wheel contacts the clamping wheel shaft, and the constant friction force can be maintained at all times, thereby ensuring a constant force of feeding and retracting the pen. At the same time, by selecting a rubber-like soft rubber material with temperature resistance for the friction wheel, the friction force and clamping force can always be kept stable at different temperatures. In addition, the adaptive part is an independent component as a whole, which can be matched with other components of the pen feeding mechanism of any pencil sharpener, and has strong adaptability.

[0105] The principle and structure of the structure are simple, the cost is low, the stability and reliability are strong, and the adaptability is strong. The problem that the current pencil sharpener has unstable pen advance and retreat, easy lead breakage, and poor cutting effect is effectively solved.

[0106] The terms and expressions used here are for description only, and the present invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, changes and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0107] Similarly, it should be pointed out that although the utility model has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the utility model, and various equivalent changes or substitutions can be made without departing from the spirit of the utility model. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the utility model, they will fall within the scope of the claims of the utility model.

Claims

1. A pencil sharpener feeding mechanism, characterized in that: The invention comprises: a pen feeding part (100), a supporting part (200) and an adaptive part (300); the center of the pen feeding mechanism comprises a pen feeding hole; a pencil can sequentially pass through the pen feeding part (100), the adaptive part (300) and the supporting part (200) to enter the interior of the pencil sharpener and complete cutting; the adaptive part (300) is accommodated between the pen feeding part (100) and the supporting part (200); wherein the adaptive part (300) comprises: a bracket (36 0), a clutch (330; 330'), a clamping wheel (320) and a clamping wheel shaft (310), the bracket (360) comprises a cavity structure, at least a portion of the clamping wheel shaft (310) is rotatably accommodated in the cavity structure, the clutch (330; 330') and the clamping wheel (320) are both sleeved on the clamping wheel shaft (310), and the clutch (330; 330') and the clamping wheel shaft (310) exist in two matching states: When V1=V2, the clutch member (330) and the clamping wheel shaft (310) rotate synchronously; When V1≠V2, slippage occurs between the clutch member (330) and the clamping wheel shaft (310); Among them, V1 is the pen feeding speed; V2 is the pen sharpening speed.

2. The pencil sharpener feeding mechanism according to claim 1, characterized in that: The number of the adaptive parts (300) is at least two.

3. The pencil sharpener feeding mechanism according to claim 2, characterized in that: The clutch component comprises a friction wheel (331) and a power input wheel (336); the friction wheel (331) and the power input wheel (336) are both sleeved on the clamping wheel shaft (310); and the power input wheel (336) and the friction wheel (331) can rotate synchronously.

4. The pencil sharpener feeding mechanism according to claim 3, characterized in that: The inner surface of the power input wheel (336) is in sliding contact with the outer surface of the clamping wheel shaft (310), and the inner surface of the friction wheel (331) is in friction contact with the outer surface of the clamping wheel shaft (310).

5. The pencil sharpener feeding mechanism according to claim 4, characterized in that: The friction wheel (331) is made of soft rubber material.

6. The pencil sharpener feeding mechanism according to claim 5, characterized in that: The power input wheel (336) is a gear structure.

7. The pencil sharpener feeding mechanism according to any one of claims 3 to 6, characterized in that: The clamping wheel shaft (310) comprises a second shaft section (312) and a third shaft section (313); the second shaft section (312) and the third shaft section (313) have different diameters; the power input wheel (336) is sleeved on the second shaft section (312); and the friction wheel (331) is sleeved on the third shaft section (313).

8. The pencil sharpener feeding mechanism according to claim 7, characterized in that: The clamping wheel shaft (310) further comprises a fourth shaft section (314), and the clamping wheel (320) is fixedly sleeved on the fourth shaft section (314).

9. The pencil sharpener feeding mechanism according to claim 3, characterized in that: The number of the adaptive parts (300) is three.

10. A pencil sharpener, characterized in that: The invention comprises a pencil sharpener having a pen feeding mechanism as described in any one of the above, and further comprises: a housing, a motor and a cutter, wherein the pen feeding mechanism, the motor and the cutter are accommodated in the housing, and the pencil sharpener is configured so that a pencil can enter the cutter through the pen feeding mechanism to complete cutting.

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