Pen point cutting mechanism
Through the structural design of elastic engagement between the operating parts and the grooves, the existing automatic pencil sharpener has solved the problems of complex structure, high cost and low accuracy, and achieved more efficient and accurate nib thickness adjustment.
Patent Information
- Application Number
- CN202421000724.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing automatic pencil sharpener with adjustable pen nib thickness has complex structure and high cost, and the pencil thickness is low, which affects the user experience.
The structural design of elastically engaging the operating parts and grooves is adopted to simplify the number of parts and the matching method. Through the integrated design of bumps and elastic arms, the assembly gap is avoided and positioning accuracy is improved.
It realizes a simple structure, low cost, stable and reliable pen tip cutting mechanism, improves the thickness and precision of pen tip and improves user experience.
Smart Images
Figure CN222610801U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of stationery and file parts, in particular to a pen tip cutting mechanism. Background Art
[0002] With the continuous development of the stationery market and consumers' increasing attention to the stationery experience, automatic pencil sharpeners with adjustable nib thickness have gradually become popular products on the market. Traditional pencil sharpeners can only achieve simple pencil sharpening functions and cannot adjust the thickness of the nib according to the actual needs of users, which limits their scope of use and convenience to a certain extent. In order to meet the market demand for personalized stationery, relevant manufacturers have begun to explore automatic pencil sharpeners that can adjust the thickness of the nib. In existing automatic pencil sharpeners with adjustable nib thickness, a nib thickness adjustment mechanism is usually set. Users can lock it in the corresponding position by turning the mechanism to a specified gear as needed. This operation will push the nib top block in conjunction, so that it moves to a different distance from the pen inlet of the tool holder in the tool holder assembly, and stop axial movement accordingly. When the nib of the pencil is inserted into the pencil sharpener and contacts the nib top block at the set position, the nib top block can effectively prevent the nib from continuing to enter the tool holder, thereby controlling the stop of cutting. Since the position of the top block of the pen tip is set according to the gear selected by the user, the depth of the pencil entering the tool holder is also controlled, thereby achieving the adjustment of the thickness of the pencil tip. Although the existing automatic pencil sharpeners with adjustable pen tip thickness have achieved certain results, there is still room for further improvement and optimization. For example, the gear automatic locking mechanism of the existing pen tip thickness adjustment mechanism generally uses a spring to push a boss mechanism into a groove mechanism to complete the locking action. This structure is complex because the spring and the locking boss are composed of at least two parts, and the material and production costs are high. At the same time, because there is an assembly gap between the spring and the locking boss, it is easy to cause the boss to shake after locking, thereby reducing the gear position accuracy, thereby causing the adjusted pen tip thickness accuracy to be reduced, causing inconvenience to use.
[0003] There is an urgent need for a pen tip adjustment mechanism with simple structure and assembly, low cost, reliable gear locking and positioning accuracy, so as to solve the technical problems of the current pen tip thickness adjustment mechanism with complex structure, high cost and low pen tip thickness accuracy.
[0004] The present invention aims to provide a novel pen tip cutting mechanism with adjustable pen tip thickness, and achieves a more precise, stable and efficient pen sharpening function by further improving and optimizing the existing technology, thereby meeting the market's higher demand for personalized stationery products. Utility Model Content
[0005] The purpose of the utility model is to provide a pen tip cutting mechanism, which is simple to assemble, low in cost, and has reliable gear locking and positioning accuracy, so as to solve the problems of the current pen tip cutting mechanism having a complex structure, high cost, and low pen tip thickness accuracy.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A pencil tip cutting mechanism is arranged in an automatic pencil sharpener to cut pencils, comprising: a cutting piece, an abutting piece, an adjusting piece and a switch, wherein: when the switch is subjected to pressing pressure, the cutting piece can be controlled to perform a cutting action; the cutting piece can accommodate at least a part of the pencil along the axial direction and directly contact the surface of the pencil to be cut, and cuts under the drive of a motor; when cutting, one end of the abutting piece abuts against the lower end of the pencil, and the other end abuts against the upper end of the switch to provide pressing pressure for the switch; the adjusting piece can drive the switch to move up and down along the axial direction.
[0008] Furthermore, the adjusting member includes a switch seat, a toggle member, and a base.
[0009] Furthermore, at least a portion of the switch is accommodated inside the switch seat.
[0010] Further, the toggle member can move around an axis in the base.
[0011] Furthermore, the switch seat abuts against the toggle member.
[0012] Furthermore, the switch seat can move axially under the drive of the toggle member.
[0013] Furthermore, the bottom surface of the switch seat abuts against the toggle member.
[0014] Furthermore, the bottom surface of the switch seat includes a first plane, a second plane and a third plane at different levels.
[0015] Furthermore, the toggle member includes an operating member.
[0016] Furthermore, the outer wall of the operating member includes a protrusion.
[0017] Furthermore, the projection can move in the radial direction.
[0018] Furthermore, the inner wall of the base includes a plurality of grooves.
[0019] Furthermore, the groove and the protrusion are complementary in shape.
[0020] Furthermore, by turning the operating member, the protrusion can be engaged and locked with each groove or disengaged from the groove.
[0021] Furthermore, the operating member further includes an elastic arm along the circumferential direction, and the protrusion is arranged on the elastic arm.
[0022] Furthermore, the protrusion and the groove are both V-shaped.
[0023] Furthermore, the cutting element includes a tool and a tool holder.
[0024] Furthermore, the tool holder is used to support and fix the tool.
[0025] Furthermore, the pen tip cutting mechanism also includes a transmission member.
[0026] Furthermore, the transmission member as a whole is a center-through structure.
[0027] Furthermore, the power is transmitted to the cutting element through the transmission element motor.
[0028] Furthermore, the transmission member includes an upper cover, a gear and a lower cover.
[0029] Furthermore, the upper cover, the gear and the lower cover are coaxially arranged from top to bottom.
[0030] Furthermore, the operating member is made of elastic plastic.
[0031] The utility model provides a pen tip cutting mechanism, which has the following beneficial effects compared with the prior art:
[0032] The structural design of the operating part on the pen tip cutting mechanism and the elastic engagement of the groove reduces the number of parts and the matching method, making it easier to assemble and improving the fault tolerance rate compared to the conventional adjustment through the spring. In addition, since the bump and the elastic arm are designed as one piece, the problem of assembly gap is avoided, the positioning accuracy is greatly improved, and the thickness and precision of the cut pen tip are also greatly improved.
[0033] The principle and structure of the structure are simple, the cost is low, and it is stable and reliable, which effectively solves the problems of complex structure of the pen tip cutting mechanism, high cost, troublesome assembly, and low pen tip thickness accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] 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.
[0035] Figure 1 It is a schematic diagram of an exploded view of the nib cutting mechanism;
[0036] Figure 2 is a schematic diagram of a front view of the pen tip cutting mechanism in the first gear position;
[0037] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional view in the AA direction;
[0038] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional view in the BB direction;
[0039] Figure 5 This is a schematic diagram of the pencil state after the first gear cutting is completed;
[0040] Figure 6 is a schematic diagram of a front view of the pen tip cutting mechanism in the second gear position;
[0041] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional view in the AA direction;
[0042] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional view in the BB direction;
[0043] Fig. 9 This is a schematic diagram of the pencil state after cutting at the second gear;
[0044] Fig.10 It is a schematic diagram of the front view of the pen tip cutting mechanism during the gear switching process;
[0045] Fig.11 yes Fig.10 Schematic diagram of the cross-sectional view in the AA direction;
[0046] Fig.12 yes Fig.10 Schematic diagram of the cross-sectional view in the BB direction;
[0047] Fig.13 is a schematic diagram of a three-dimensional view of the base;
[0048] Fig.14 It is a schematic diagram of a three-dimensional view of the base from another angle;
[0049] Fig.15 It is a three-dimensional schematic diagram of the operating parts;
[0050] Fig.16 It is a three-dimensional schematic diagram of the operating part from another angle;
[0051] Fig.17 It is a three-dimensional schematic diagram of the operating member in another direction;
[0052] Fig.18 It is a three-dimensional schematic diagram of the adjusting member;
[0053] Fig.19 It is a three-dimensional schematic diagram of the adjusting member in another direction;
[0054] Fig. 20 It is a three-dimensional schematic diagram of the switch seat;
[0055] Fig.21This is a three-dimensional schematic diagram of the switch base in another direction;
[0056] Fig. 22 It is a three-dimensional schematic diagram of the switch;
[0057] Fig.23 It is a three-dimensional schematic diagram of gears;
[0058] Fig.24 It is a three-dimensional schematic diagram of the cover;
[0059] Fig.25 It is a three-dimensional schematic diagram of the lower cover;
[0060] Fig.26 is a three-dimensional schematic diagram of an abutment column;
[0061] Fig. 27 It is a three-dimensional schematic diagram of the cutting piece;
[0062] Fig.28 It is a three-dimensional schematic diagram of the cutting piece in another direction;
[0063] Fig.29 It is a three-dimensional schematic diagram of the cutting piece;
[0064] Fig.30 It is a three-dimensional schematic diagram of the top block.
[0065] The reference numerals are described as follows:
[0066] Switch: 80
[0067] Contacts: 81
[0068] Pencil: 90
[0069] Cutting parts: 100
[0070] Tool: 110
[0071] Tool holder: 120
[0072] Positioning column: 121
[0073] Tool holder mounting hole: 130
[0074] Gear mounting holes: 140
[0075] Abutment: 200
[0076] Abutment Block: 210
[0077] Positioning holes: 211
[0078] Butt post: 220
[0079] Headend: 221
[0080] Tail: 222
[0081] Adjustment parts: 300
[0082] Switch seat: 310
[0083] First plane: 311
[0084] Second plane: 312
[0085] Third plane: 313
[0086] Cavity: 318
[0087] Toggle: 320
[0088] Operating parts: 330
[0089] Bumps: 331
[0090] Elastic Arm: 332
[0091] Dial: 333
[0092] Connecting column: 334
[0093] Guide arm: 335
[0094] Adjustment parts: 340
[0095] Tables: 341
[0096] Axle hole: 342
[0097] Connection slots: 344
[0098] Connection slots: 344
[0099] - Base: 390
[0100] Grooves: 391
[0101] External protruding ribs: 392
[0102] Internal ribs: 393
[0103] Transmission parts: 400
[0104] Upper cover: 410
[0105] Tool hole: 411
[0106] Gear holes: 412
[0107] - Gears: 420
[0108] Gear key: 421
[0109] Mounting holes: 422
[0110] Lower cover: 430
[0111] Switch seat slot: 431
[0112] Adjustment shaft: 434
[0113] First slope: 311a
[0114] Second slope: 312a DETAILED DESCRIPTION
[0115] 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.
[0116] 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.
[0117] 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.
[0118] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.
[0119] 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.
[0120] Figure 1 This is a schematic diagram of the exploded view of the pen tip cutting mechanism. Figure 2 to Figure 4 For the assembly diagram and cross-sectional view of the pen tip cutting mechanism, refer to Figure 1 to Figure 4 The cutting mechanism includes, from top to bottom, a cutting member 100, a transmission member 400, a switch 80 and an adjusting member 300. The abutting member 200 penetrates the transmission member 400, and the upper end portion is accommodated in the interior of the cutting member 100. The toggle member 320 includes an operating member 330 and an adjusting member 340.
[0121] Optionally, the toggle member 320 can be a split structure or an integrally formed structure, that is, the operating member 330 and the adjusting member 340 can be a split design or an integrally formed structure.
[0122] Fig.13 , Fig.14The figure shows a schematic diagram of the base 390. As can be seen from the reference picture, the base 390 is disc-shaped as a whole, and includes an outer protruding rib 392 and an inner protruding rib 393 along the outer circumference. The inner protruding rib 393 and the outer protruding rib 392 form an arc-shaped guide rail structure. The base 390 accommodates and supports the toggle member 320.
[0123] Figure 15 to Figure 17 The figure shows a schematic diagram of the operating member 330. Referring to the figure, it can be seen that the operating member 330 is an arc-shaped sheet structure as a whole, and a dial button 333 extends radially outward on the outer wall, which is used for the user to dial the operation and is easy to exert force. Specifically, the surface of the dial button 333 is processed with textures to increase the friction force and make it easier to operate. The outer periphery of the operating member 330 also includes a protrusion 331, an elastic arm 332 and a guide arm 335, and the inner periphery also includes a connecting column 334. The protrusion 331 is arranged on the outer surface of the elastic arm 332, and the two are integrally formed. The protrusion 331 can be driven by the elastic arm 332 to undergo a certain displacement in the radial direction.
[0124] Specifically, the shapes of the projection 331 and the groove 391 are complementary, both of which are V-shaped. The V-shaped design allows the projection 331 and the groove 391 to be locked in the abutting state, and can be smoothly disengaged from each other due to the guiding effect of the side slope when the operating member 330 is toggled. The width of the guide arm 335 matches the arc-shaped guide rail structure formed between the inner protruding rib 393 and the outer protruding rib 392, so that the operating member 330 can slide along the guide rail in the base 390.
[0125] Figures 18-19 The schematic diagram of the adjusting member 340 is shown. As can be seen from the reference picture, the adjusting member 340 includes an axial hole 342, a ball table 341 and a connecting groove 344. The operating member 330 and the adjusting member 340 are connected together through a connecting column 334 and a connecting groove 344. The ball table 341 can be pressed against the bottom of the switch seat 310 to push the switch seat 310 up and down.
[0126] Specifically, the operating member 330 and the adjusting member 340 may also be integrally formed.
[0127] Fig. 20 The figure shows a schematic diagram of the bottom surface of the switch base 310. Referring to the figure, it can be seen that the bottom surface of the switch base 310 contains a first plane 311, a second plane 312 and a third plane 313 at different levels, and each plane is connected by a first inclined plane 311a and a second inclined plane 312a.
[0128] Fig.21 The figure is a three-dimensional schematic diagram of the front side of the switch base 310 . Referring to the figure, it can be seen that the switch base 310 includes a cavity 318 , at least a portion of the switch 80 is accommodated in the cavity 318 , and the shape of the accommodating portion can fit with the switch 80 .
[0129] Fig. 22FIG. 8 is a three-dimensional schematic diagram of a switch 80 . A contact 81 is disposed on the switch 80 , and the contact 81 abuts against the tail end 222 of the abutting column 220 .
[0130] Figures 23 to 25 The structure of the transmission member 400 is shown, wherein Fig.23 The gear 420 has a mounting hole 422 in the middle for the abutment column 220 to pass through and move up and down along the axial direction.
[0131] Fig.24 The upper cover 410 is shown, and the upper cover 410 includes a tool hole 411 and a gear hole 412. The gear 420 is axially connected to the gear hole 412 and can rotate freely; the cutting member 100 is axially connected to the tool hole 411 and can rotate freely.
[0132] Fig.25 Shown is a lower cover 430, which is provided with a switch seat groove 431 and an adjusting member shaft 434, wherein the switch seat groove 431 is used to accommodate the switch seat 310, and the switch seat 310 accommodating the switch 80 can move up and down in the switch seat groove 431, and the adjusting member 340 is axially connected to the adjusting member shaft 434 and the adjusting member 340 can rotate around it.
[0133] Since the transmission member 400 is connected to the cutting member through a gear in a axial transmission manner, it is relatively common, and thus will not be described in detail. It is easy to understand that the transmission member 400, as a transition element, can be adaptively assembled with the contacting element.
[0134] Fig.26 It is a schematic diagram of the abutting column 220 , wherein the abutting column head end 221 abuts against the lower end of the abutting block, and the abutting column tail end 222 abuts against the contact 81 .
[0135] Figure 27-29 1 is a three-dimensional schematic diagram of a tool, including a tool 110 and a tool holder 120. The tool holder 120 positions and supports the tool 110. The side of the tool holder 120 includes a hollow structure extending along the axis, and the hollow structure includes a positioning column 121. The abutment block 210 can slide axially along the tool holder through the positioning column 121. Fig.28 The lower end of the tool holder 120 is provided with a gear mounting hole 140, and a keyway is machined in the gear mounting hole 140, which can cooperate with the gear key 421 at the upper end of the gear to achieve synchronous rotation. The tool holder mounting hole 130 is axially connected to the tool hole 411 of the upper cover and the tool holder 120 can rotate around it.
[0136] Specifically, the cutter 110 is a rolling cutter.
[0137] Fig.30 is a schematic diagram of an abutment block 210, the abutment block includes a positioning hole 211, such as Fig. 27As shown, the abutment block 210 and the tool holder 120 are slidably matched together through the positioning hole 211 and the positioning column 121 respectively.
[0138] Specifically, the abutment member 200 may be a split structure or an integrally formed structure, that is, the abutment block 210 and the abutment column 220 may be independent of each other or may be an integral whole.
[0139] The working principle of the cutting mechanism is as follows:
[0140] Figure 2 to Figure 5 3 is a schematic diagram of the operation of the cutting mechanism in the first gear. At this time, the protrusion 331 corresponds to the groove 391 on the far left. Under the elastic force of the elastic arm 332, the protrusion 331 abuts against the groove 391. At this time, the ball table 341 on the adjustment member 340 abuts against the first plane 311 of the switch seat 310 and is in a stable state. In the first gear, the switch seat 310 is in the lowest position, and the switch 80 is also in the lowest position. Therefore, the abutting member 200 is also in the lowest position when the contact 81 is touched. At this time, the pencil tip sharpened is the thinnest, that is, φb is the smallest.
[0141] Figure 6 to Figure 9 This is a schematic diagram of the working state of the cutting mechanism in the second gear position. If a thicker pen tip needs to be cut, the user pushes the dial button 333 to the right. Fig.12 , under the limitation of the outer rib 392 and the inner rib 393, the operating member 330 can only rotate around the axis, and because the elastic arm 332 can be deformed, during the counterclockwise sliding process, the protrusion 331 moves radially inward from the leftmost groove 391 under the guidance of the V-shaped side and disengages until the protrusion 331 abuts against the middle groove 391. Under the elastic force of the elastic arm 332, the protrusion 331 abuts against the groove 391 and locks. In addition, the operating member 330 also drives the adjusting member 340 to rotate synchronously during the rotation process. At this time, the ball table 341 on the adjusting member 340 slides under the guidance of the first inclined surface 311a and finally abuts against the second plane 312 of the switch seat 310. The first inclined surface 311a guides the ball table 341. At this time, the switch seat 310 is raised in height, thereby driving the switch 80 upward, and finally causing the abutting member 200 to move upward as a whole. In this state, the pencil tip cut out becomes thicker, that is, φa>φb.
[0142] If it is necessary to continue adjusting the thickness of the pen tip, for example, if a thicker pen core is needed, the dial button 333 is continuously turned to the right to repeat the above process.
[0143] Similarly, if the pen tip needs to be thinner, the dial button 333 is turned in the opposite direction. At this time, the abutment member 200, the switch 80 and the switch seat 310 will fall back under the action of gravity until they are in a stable abutment state with the ball table again.
[0144] By utilizing the deformation characteristics of the elastic arm 332, the protrusion 331 can abut against and lock the groove 391 at different positions, and when the protrusion 331 corresponds to the groove 391 at different positions, the toggle member 320 can drive the switch seat 310 to different height positions to adjust the cutting thickness of the pencil tip. The elastic arm 332 replaces the function of the material spring or other elastic components, and is integrally formed with the protrusion 331, which has a simpler structure and is easy to process. At the same time, the structural design of the protrusion and the groove makes the two fit very tightly, close to zero clearance fit, to achieve the control accuracy of the height position of the abutment, thereby ensuring the thickness accuracy of the sharpened pencil tip.
[0145] Industrial Applicability
[0146] In summary, the utility model provides a pen tip cutting mechanism, which uses a structural design in which the operating member on the pen tip cutting mechanism is elastically engaged with the groove, which reduces the number of parts and the matching method, is easy to assemble, and improves the fault tolerance rate compared to the conventional adjustment through the spring. In addition, since the protrusion and the elastic arm are designed as an integrated whole, the assembly gap problem is avoided, the positioning accuracy is greatly improved, and the thickness and fineness accuracy of the cut pen tip is also greatly improved.
[0147] The principle and structure of the structure are simple, the cost is low, and it is stable and reliable, which effectively solves the problems of complex structure of the pen tip cutting mechanism, high cost, troublesome assembly, and low precision of pen tip thickness adjustment.
[0148] 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.
[0149] 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 tip cutting mechanism, arranged in an automatic pencil sharpener to cut pencils, characterized in that: It comprises: a cutting piece (100), an abutting piece (200), an adjusting piece (300) and a switch (80), wherein: When the switch (80) is pressed, it can control the cutting piece (100) to perform a cutting action; The cutting piece (100) can accommodate at least a portion of the pencil (90) in the axial direction and directly contacts the surface to be cut of the pencil (90), and performs cutting under the drive of a motor; When cutting, one end of the abutment member (200) abuts against the lower end of the pencil (90), and the other end abuts against the upper end of the switch (80) to provide pressing pressure for the switch (80); The adjusting member (300) can drive the switch (80) to move up and down along the axial direction.
2. The pen tip cutting mechanism according to claim 1, characterized in that: The adjusting member (300) comprises a switch seat (310), a toggle member (320) and a base (390); at least a portion of the switch (80) is accommodated inside the switch seat (310); the toggle member (320) is capable of moving around an axis in the base (390); the switch seat (310) is in contact with the toggle member (320) and is capable of moving along an axial direction under the drive of the toggle member (320).
3. The pen tip cutting mechanism according to claim 2, characterized in that: The bottom surface of the switch seat (310) abuts against the toggle member (320), and the bottom surface of the switch seat (310) comprises a first plane (311), a second plane (312), and a third plane (313) of different levels.
4. The pen tip cutting mechanism according to claim 2, characterized in that: The toggle member (320) includes an operating member (330), the outer wall of the operating member (330) includes a protrusion (331), and the protrusion (331) can move in the radial direction. The inner wall of the base (390) includes a plurality of grooves (391), and the grooves (391) are complementary in shape to the protrusions (331). When the operating member (330) is toggled, the protrusions (331) can be engaged and locked with each of the grooves (391) or disengaged from the grooves (391).
5. The pen tip cutting mechanism according to claim 4, characterized in that: The operating member (330) further comprises an elastic arm (332) along the circumferential direction, and the protrusion (331) is arranged on the elastic arm (332).
6. The pen tip cutting mechanism according to claim 4, characterized in that: The protrusion (331) and the groove (391) are both V-shaped.
7. The pen tip cutting mechanism according to claim 2, characterized in that: The cutting piece (100) comprises a tool (110) and a tool holder (120), wherein the tool holder (120) is used to support and fix the tool (110).
8. The pen tip cutting mechanism according to claim 2, characterized in that: The pen tip cutting mechanism further comprises a transmission member (400), the transmission member (400) being a center-through structure as a whole, and the motor transmits power to the cutting member (100) through the transmission member (400).
9. The pen tip cutting mechanism according to claim 8, characterized in that: The transmission member (400) comprises an upper cover (410), a gear (420) and a lower cover (430), wherein the upper cover (410), the gear (420) and the lower cover (430) are coaxially arranged from top to bottom.
10. The pen tip cutting mechanism according to claim 4, characterized in that: The operating member (330) is made of elastic plastic.