CN114523792B

CN114523792B - Automatic boosting pen structure with nib protection

Info

Publication number: CN114523792B
Application number: CN202210026724.8A
Authority: CN
Inventors: 曾凡碧; 郑崇廷; 曹锋; 赵鹏
Original assignee: Ningbo Tiantian Stationery Co ltd
Current assignee: Ningbo Tiantian Stationery Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2023-11-03
Anticipated expiration: 2041-10-29
Also published as: CN114523792A; CN114103533A; CN114523791A; CN114103533B

Abstract

The invention discloses an automatic boosting pen structure with nib protection, which comprises an automatic pen feeding structure, a nib protection structure and a detachable penholder; the detachable pencil sharpening frame comprises an upper part, a middle part and a lower part, the automatic pencil feeding structure is arranged at the upper part, and the pencil point protection structure penetrates through the upper part, the middle part and the lower part; the invention provides the automatic boosting pen structure with the nib protection, which has the advantages of simple structure, convenient operation, relatively low cost and longer service life.

Description

Automatic boosting pen structure with nib protection

This application is the patent number: 2021112674382, a divisional application of a pencil sharpener.

Technical Field

The invention relates to the field of stationery, in particular to an automatic boosting pen structure with pen point protection.

Background

The electric pencil sharpener is a common stationery, and consists of a shell component, a knife rest component, a driving component, a power supply component and the like, wherein: the tool rest assembly, the driving assembly, the power supply assembly and the like are arranged in the inner space of the shell assembly; the driving assembly consists of a motor, a gear box and other parts, the motor is electrically connected with the power supply assembly, and the gear box is in transmission connection with the motor and the tool rest assembly; therefore, the power of the motor is transmitted to the cutter rest to drive the blade on the cutter rest to rotate, and finally the pencil sharpening process is completed.

The existing electric pencil sharpener is generally used for manually feeding a pencil and relying on human subjective judgment to judge whether the pencil is sharpened or not, so that the pencil is easy to be mistakenly sharpened in the pencil sharpening process, great waste is caused, and the requirements of users can be met by the electric pencil sharpener which is more economical and environment-friendly at the present day that resources are increasingly exhausted.

Disclosure of Invention

The pencil sharpener overcomes the defects of the prior art, and has the advantages of simple structure, convenient operation, relatively low cost and longer service life.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a pencil sharpener comprises an automatic pencil feeding structure, a self-starting structure, a knife rest, a gear adjusting structure, a pencil point protecting structure and a detachable pencil sharpening frame;

the detachable pencil sharpening frame comprises an upper part, a middle part and a lower part, the automatic pencil feeding structure is arranged on the upper part, the tool rest is arranged on the middle part, the gear adjusting structure is arranged on the lower part, and the self-starting structure and the pencil point protecting structure penetrate through the upper part, the middle part and the lower part.

Further, the automatic pen feeding structure compatible with various pen sizes comprises at least two clamping units, and the plurality of clamping units form a rotary pattern; the clamping unit axially moves within a certain range; the clamping unit comprises a clamping limit sleeve, a clamping rotating wheel, a clamping rotating tooth sleeve, a limit rotating disc and a clamping polish rod, wherein the clamping limit sleeve, the clamping rotating wheel and the clamping rotating tooth sleeve are sequentially sleeved on the clamping polish rod, the limit rotating disc is arranged below the clamping polish rod, and a gear on the limit rotating disc is in contact with the clamping rotating tooth sleeve.

Further, the clamping rotating wheel is made of rubber materials; friction blocks are distributed on the contact surfaces of the clamping limiting sleeve, the clamping rotating tooth sleeve and the clamping rotating wheel, and the friction blocks are integrally triangular columns; one side of the clamping rotary tooth sleeve, which is close to the clamping rotary wheel, is provided with a clamping limit boss, the cross section of the clamping limit boss is isosceles trapezoid, and the whole clamping limit boss is arc-shaped.

Further, the clamping unit further comprises a clamping sleeve, wherein the clamping sleeve is arranged at the middle part of the clamping polished rod and is positioned at the inner side of the clamping rotating wheel; the clamping sleeve is made of plastic parts, and a certain distance is reserved between the clamping sleeve and the clamping limiting sleeve as well as between the clamping sleeve and the clamping rotating tooth sleeve.

Further, the pencil sharpener also comprises a driving fluted disc, wherein the driving fluted disc is matched with the limiting rotary disc, and a buckle is arranged in the middle of the driving fluted disc and used for limiting the limiting rotary disc and connecting other parts of the pencil sharpener.

Further, the self-starting structure comprises a starting clamping piece, a starting connecting piece and a starting switch, wherein the starting clamping piece starts the starting switch through the starting connecting piece; the starting clamping piece is moved by external force, the starting connecting piece moves according to the starting clamping piece, the moving direction of the starting clamping piece is different from that of the starting connecting piece, the starting clamping piece and the starting connecting piece are provided with chamfer surfaces, and the starting clamping piece and the starting connecting piece are contacted through the chamfer surfaces.

Further, the starting connector comprises a reset connector rod and a guide rod, and a certain distance is reserved between the reset connector rod and the guide rod; the reset connecting rod is integrally F-shaped and comprises a first reset cross rod, a second reset cross rod, a reset vertical rod and a reset spring, wherein the second reset cross rod is fixed at a certain position of the reset spring, and one end of the reset spring is fixed at one side of the first reset cross rod, which is close to the second reset cross rod.

Further, a placement groove is formed in the upper portion of the detachable penholder and corresponds to the second reset cross rod, and the second reset cross rod moves in the placement groove; the starting clamping piece comprises a starting guide block, a starting clamping block and a starting spring, wherein the starting guide block is fixedly connected to one side, close to the starting connecting piece, of the starting clamping block, and the starting spring is arranged above the starting guide block; the starting guide block is contacted with the reset connecting rod; the contact position of the starting guide block and the reset connecting rod is provided with a bevel; the position of the starting clamping block close to the pen inlet is provided with an arc-shaped groove surface, and the thickness of the arc-shaped groove surface, which is formed by the whole of the arc-shaped groove surface, is increased from the upper side to the lower side towards the middle, namely, the middle distance from the pen inlet is the farthest from the upper side and the lower side, and the middle is nearest; the arc-shaped surface is arc-shaped from left to right; wherein at least 1 of the grippers are actuated; the starting switch controls the motor of the pencil sharpener to work.

Further, the gear adjusting structure comprises a gear adjusting part, a pen assisting block and a gear guide piece, wherein the gear adjusting part controls the pen assisting block to move through the gear guide piece so as to control the length of a pen point; the pen assisting block is arranged in a corresponding space of the tool rest and can move in the space; the gear adjusting part is a circular column-shaped gear as a whole, the height of the gear part is gradually increased, and the highest part is as high as the middle position of the gear adjusting part; the gear adjusting structure also comprises an adjusting piece, wherein the adjusting piece adopts a gear which is in contact fit with the gear adjusting part; the lower part of the detachable penknife is provided with a notch exposing the adjusting piece; the lower part of the detachable penholder is provided with a supporting column for supporting the regulating element, the whole supporting column is in a circular column shape, and the outer side of the supporting column is provided with a limiting boss for supporting the regulating element; the gear guide piece moves in the axial direction, and an auxiliary fixing piece is arranged on the outer side of the gear guide piece.

Further, the pen point protection structure comprises a clamping tooth rotating sleeve, a driving fluted disc and a delay connection structure, wherein the delay connection structure controls the linkage of the clamping tooth rotating sleeve and the driving fluted disc; the time delay connection structure comprises a linkage rotating rod and a control box, and the control box controls the axial movement of the linkage rotating rod, so that the connection of the clamping tooth sleeve and the driving tooth disc is controlled; the end of the linkage rotating rod, which is close to the clamping rotary tooth sleeve, is provided with a gear, and the driving fluted disc and the clamping rotary tooth sleeve are linked through the end; the control box comprises a control box body and a delay block, wherein the control box body controls the delay block to extend into the position where the linkage rotating rod is provided with the threads; the control box body comprises a control frame and a driving block, the delay block moves according to the driving block, the moving direction of the delay block is different from that of the driving block, the delay block and the driving block are both provided with chamfer surfaces, and the delay block and the driving block are contacted through the chamfer surfaces; the control box body further comprises a delay spring, and the delay spring is connected with one end of the control frame and one end of the delay block; the delay block comprises a delay block body, a spring connecting end connected with a delay spring and a delay guide block, and a control frame is provided with a notch which is suitable for the delay block body; the delay connection structure also comprises a gear adjusting structure, and a gear adjusting part of the gear adjusting structure provides a force for the driving block to move.

Compared with the prior art, the invention has the advantages that:

1, the invention has simple and reasonable structural design, convenient manufacture, strong practicability and easy popularization and use.

The whole pencil sharpener is built through the detachable pencil sharpener frame, is convenient to detach and maintain in the later period, and is a main frame of the whole pencil sharpener, and the whole pencil sharpener is supported. The convenient detachable penknife can better prolong the service life of the pencil sharpener and improve the stability.

And 3, the invention realizes dislocation limiting of the movement of the pen through the movement of the clamping unit, thereby clamping the pen to be cut. The clamping limiting sleeve integrally realizes the limiting effect, and the clamping rotating wheel is finally used for clamping the pen. The clamping tooth sleeve is matched with the limiting turntable to firmly clamp the pen, so that the pen is not loosened. The clamping rotating wheel is made of rubber materials, so that the pencil to be cut can be better protected, and the clamped part is not damaged. And the rotation of the clamping rotary tooth sleeve is used for limiting the limit of the clamping rotary tooth sleeve, wherein the clamping limit boss is matched with a gear on the clamping rotary tooth sleeve. This allows the direction of movement of the toothed sleeve and thus the pencil to be cut to be gripped. The pencil sharpener is characterized in that the pencil sharpener can trigger the starting clamping piece to move horizontally after inserting the pencil, and the starting connecting piece moves downwards due to the design of the bevel surface, so that the starting switch is triggered, and the pencil sharpener starts pencil sharpening.

4, the pen supporting block is arranged at the pen point part of the knife rest to limit the pen point length. The pen assisting block pushes and limits the moving distance through the gear guide piece. The pen-assisting block is arranged in the corresponding space of the tool rest and can move in the space.

And 5, the time-delay connecting structure is communicated with the limit turntable and the driving fluted disc, and when the limit turntable and the driving fluted disc are communicated, the pencil sharpener is in a working state. After the pencil sharpener works, the delay connection structure can disconnect the drive fluted disc from the pencil sharpener, so that the drive fluted disc can rotate for a while again by inertia, and the limit rotary disc does not work any more, and at the moment, the pencil to be sharpened can rotate along with the drive fluted disc and cannot be limited by the limit rotary disc, thereby playing the role of delaying pencil sharpening. When the pencil is cut, the pencil is cut immediately to cause the damage of the cut pencil point, and the phenomenon of barbs can not occur in the scheme. I.e. a situation similar to the idling of the pencil to be sharpened.

Drawings

FIG. 1 is an overall schematic of the present invention;

FIG. 2 is a schematic illustration of the removal of the housing of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of an automatic pen feeding structure of the present invention;

FIG. 4 is a schematic view of a clamping unit, limit turntable, and drive sprocket of the present invention;

FIG. 5 is a schematic view of a clamping stop collar of the present invention;

FIG. 6 is a schematic view of a clamping tooth sleeve of the present invention;

FIG. 7 is a schematic view of a clamping runner of the present invention;

FIG. 8 is a schematic view of a limit dial of the present invention;

FIG. 9 is a schematic view of a driving cog of the present invention;

FIG. 10 is a schematic illustration of a stress self-starting feature of the present invention;

FIG. 11 is an enlarged partial schematic view of the present invention with a focus on the self-priming feature;

FIG. 12 is a schematic view of an actuation clamp of the present invention;

FIG. 13 is a schematic view of an upper portion of the present invention;

FIG. 14 is a schematic view of a reset link of the present invention;

FIG. 15 is a schematic view of a gear position adjustment configuration of the present invention;

FIG. 16 is an enlarged schematic view of a portion of the gear position adjustment structure of the present invention;

fig. 17 is a schematic view of the structure in the vicinity of the shift position adjusting portion of the invention;

FIG. 18 is a schematic view of a nib protecting structure of the present invention;

FIG. 19 is another schematic view of the delay connection of the present invention;

FIG. 20 is a schematic view of the clutch portion of the present invention;

FIG. 21 is a schematic view of the structure in the vicinity of the control box portion of the present invention;

FIG. 22 is a schematic diagram of a control box of the present invention;

FIG. 23 is a schematic diagram of a delay block of the present invention;

FIG. 24 is a schematic diagram of a control framework of the present invention;

FIG. 25 is a schematic view of another clutch portion of the present invention;

FIG. 26 is a schematic view of the structure of the present invention in the vicinity of another control box section;

FIG. 27 is a schematic view of another control box structure of the present invention;

FIG. 28 is a schematic diagram of another delay block configuration of the present invention;

FIG. 29 is a schematic view of a portion of the removable pencil sharpener of the present invention;

FIG. 30 is a schematic view of the lower portion structure of the present invention;

fig. 31 is a schematic view of the structure of the middle part of the present invention.

The marks in the figure are as follows: automatic pen feeding structure: the clamping unit 11, the clamping limiting sleeve 111, the clamping rotating wheel 112, the clamping rotating tooth sleeve 113, the limiting turntable 114, the clamping polished rod 115, the friction block 116, the clamping limiting boss 117, the clamping sleeve 118 and the driving fluted disc 119;

self-starting structure: the starting clamping piece 21, the starting guide block 211, the starting clamping block 212, the starting spring 213, the arc-shaped groove surface 214, the starting connecting piece 22, the resetting connecting rod 221, the guide rod 222, the first resetting cross rod 223, the second resetting cross rod 224, the resetting vertical rod 225, the resetting spring 226 and the starting switch 23; a tool holder 3;

gear adjusting structure: gear adjusting part 41, gear part 411, pen assisting block 42, gear guide 43, adjusting part 44, auxiliary fixing part 45;

nib protection structure: the device comprises a limit turntable 114, a driving fluted disc 119, a delay connecting structure 51, a linkage rotating rod 52, a control box 53, a control box body 531, a delay block 532, a control frame 5311, a driving block 5312, a delay spring 5313, a delay block body 53121, a spring connecting end 53122, a delay guide block 53123 and a notch 53111;

detachable pencil sharpening rack: upper portion 61, placement groove 611, middle portion 62, lower portion 63, notch 631, support post 632, and stop boss 633.

Detailed Description

The invention is further described below with reference to the drawings and the detailed description. The portions not described in detail herein may be implemented by conventional technical means.

As shown in fig. 1 to 31, a pencil sharpener includes an automatic pencil feeding structure, a self-starting structure, a cutter holder 3, a gear adjusting structure, a nib protecting structure and a detachable pencil sharpening frame.

The detachable penholder comprises an upper part 61, a middle part 62 and a lower part 63, an automatic pencil feeding structure is arranged on the upper part 61, the tool rest 3 is arranged on the middle part 62, a gear adjusting structure is arranged on the lower part 63, and a self-starting structure and a pencil point protecting structure penetrate through the upper part 61, the middle part 62 and the lower part 63. The whole pencil sharpener is built through the detachable pencil sharpener frame, and is convenient to detach and maintain in the later period, and is a main frame of the whole pencil sharpener, so that the whole pencil sharpener is supported. The convenient detachable penknife can better prolong the service life of the pencil sharpener and improve the stability.

The specific automatic pen feeding structure comprises an automatic pen feeding structure compatible with various pen sizes, wherein the automatic pen feeding structure comprises at least two clamping units 11, and the plurality of clamping units 11 form a rotary pattern; the clamping unit 11 is axially movable within a certain range. That is, by the movement of the clamping unit 11, the dislocation limiting of the movement of the pen is achieved, thereby clamping the pen to be shaved. In general, two clamping units 11 are required, and the clamping units 11 can form dislocation movement to clamp the pen due to the adoption of a rotating pattern. If three clamping units 11 are adopted, three are designed in a triangle shape in the same way, and the three are moved in a dislocation manner to clamp the pen.

The clamping unit 11 comprises a clamping limit sleeve 111, a clamping rotating wheel 112, a clamping rotating toothed sleeve 113, a limit rotating disc 114 and a clamping polished rod 115, wherein the clamping limit sleeve 111, the clamping rotating wheel 112 and the clamping rotating toothed sleeve 113 are sequentially sleeved on the clamping polished rod 115, the limit rotating disc 114 is arranged below the clamping polished rod 115, and a gear on the limit rotating disc 114 is in contact with the clamping rotating toothed sleeve 113. The clamping limiting sleeve 111 achieves limiting effect as a whole, and the clamping rotating wheel 112 is finally used for clamping the pen. The clamping rotary tooth sleeve 113 is matched with the limiting rotary disc 114 to firmly clamp the pen and prevent the pen from loosening. The clamping rotating wheel 112 is made of rubber material, so that the pencil to be cut can be better protected, and the clamped part is not damaged.

Preferably, friction blocks 116 are distributed on the contact surfaces of the clamping limiting sleeve 111, the clamping rotating gear sleeve 113 and the clamping rotating wheel 112, and the friction blocks 116 are integrally triangular columns. To better synchronize the clamping stop 111, the clamping tooth sleeve 113 and the clamping runner 112.

The side of the limiting turntable 114, which is close to the clamping rotating wheel 112, is provided with a clamping limiting boss 117, the section of the clamping limiting boss 117 is isosceles trapezoid, and the whole clamping limiting boss 117 is arc-shaped. Namely, the rotation of the limiting turntable 114 is used for limiting the limit of the clamping rotary tooth sleeve 113, wherein the clamping limiting boss 117 is matched with a gear on the clamping rotary tooth sleeve 113. Thereby achieving a clamping of the direction of movement of the rotating sleeve 113 and thus the pencil to be cut. When the number of the specific clamping limiting bosses 117 is one, the distance between the head and the tail is the distance for clamping one gear on the rotary tooth sleeve. If the rotation speed of the clamping runner 112 is to be increased, a plurality of clamping limiting bosses 117 are required. When at least two clamping limiting bosses 117 are arranged, the distance between the head and the tail of each adjacent clamping limiting boss 117 is the distance of one gear on the clamping rotary tooth sleeve 113. I.e. the lateral spacing between the tail of the previous clamping limit boss 117 and the head of the next clamping limit boss 117 is the distance of one gear on the clamping rotary sleeve 113. Regardless of how many clamping limit bosses 117 are provided, the distribution must be a circle.

Preferably, the clamping unit 11 may further include a clamping sleeve 118, and the clamping sleeve 118 is disposed at a middle portion of the clamping polish rod 115, which is located inside the clamping runner 112. That is, the clamping runner 112 is generally made of rubber material, and is directly sleeved on the clamping polished rod 115, so that the clamping runner is difficult to move and inconvenient to move in a dislocation manner; a clamping sleeve 118 is thus added to facilitate movement of the clamping wheel 112 to protect the pencil to be sharpened. That is, the clamping sleeve 118 is generally a plastic member, and a certain distance is formed between the clamping sleeve 118 and the clamping limiting sleeve 111 and between the clamping rotating tooth sleeve 113, and the certain distance is generally controlled within the range of the height of the clamping limiting boss 117.

The automatic pencil feeding structure can further comprise a driving fluted disc 119, the driving fluted disc 119 is matched with the limiting rotary disc 114 for use, and a buckle is arranged in the middle of the driving fluted disc 119 and used for limiting the limiting rotary disc 114 and connecting other parts of the pencil sharpener. Wherein the driving fluted disc 119 drives the limit turntable 114 to rotate together with the limit turntable by other members.

The self-starting structure specifically comprises a starting clamping piece 21, a starting connecting piece 22 and a starting switch 23, wherein the starting clamping piece 21 starts the starting switch 23 through the starting connecting piece 22; the starting clamping piece 21 moves under the action of external force, the starting connecting piece 22 moves according to the starting clamping piece 21, the moving direction of the starting clamping piece 21 is different from that of the starting connecting piece 22, the starting clamping piece 21 and the starting connecting piece 22 are both provided with chamfer surfaces, and the starting clamping piece 21 and the starting connecting piece 22 are contacted through the chamfer surfaces. That is, after the pencil sharpener is inserted, the actuating clamping member 21 is triggered to move horizontally, the actuating engagement member 22 is moved downwardly due to the design of the chamfer, and the actuating switch 23 is triggered, so that the pencil sharpener starts pencil sharpening. I.e. the start switch 23 controls the operation of the motor of the pencil sharpener.

The actuating link 22 includes a return-to-position connecting rod 221 and a guide rod 222, with a space between the return-to-position connecting rod 221 and the guide rod 222. This distance is typically set to a few millimeters to avoid misinsertion and triggering of the sharpener. The detachable pencil sharpening rack is integrally divided into three parts, so that the self-starting structure is convenient to split, and subsequent installation and maintenance are convenient.

The reset connecting rod 221 is integrally F-shaped and comprises a first reset cross rod 223, a second reset cross rod 224, a reset vertical rod 225 and a reset spring 226, wherein the second reset cross rod 224 is fixed at a certain position of the reset spring 226, and one end of the reset spring 226 is fixed at one side of the first reset cross rod 223 close to the second reset cross rod 224. Wherein the first reset bar 223 is longer than the second reset bar 224 for advancing movement in contact with the actuation clamp 21. The second reset cross bar 224 cooperates with the corresponding location of the upper portion 61 of the detachable sharpening rack to limit the movement of the reset connecting bar 221 from moving down too much. That is, the upper portion 61 of the detachable penholder is provided with a seating groove 611 at a position corresponding to the second restoring beam 224, and the second restoring beam 224 moves within the seating groove 611. The return vertical rod 225 pushes the guide rod 222, and the return spring 226 pushes the return connecting rod 221 reversely, so that the self-starting structure is released.

The starting clamping piece 21 comprises a starting guide block 211, a starting clamping block 212 and a starting spring 213, wherein the starting guide block 211 is fixedly connected to one side, close to the starting connecting piece 22, of the starting clamping block 212, and the starting spring 213 is arranged above the starting guide block 211; the actuation guide block 211 is in contact with the reset docking rod 221. In principle, only one actuating clamp 21 is required, the pen is pushed into the actuating clamp block 212 to move horizontally, the actuating guide block 211 is pushed, and the actuating spring 213 is compressed. That is, the position where the actuation guide block 211 contacts the reset connecting rod 221 is provided with a chamfer to form the pushing force to the reset connecting rod 221. However, for better operation, two actuating clamps 21 are typically provided, one of which is identical to a single one and the other of which is not in contact with the reset connecting rod 221, and is provided only on opposite sides, so that a bi-directional clamp is formed, which can better clamp the pencil to be shaved. Naturally, three or more may be provided to better achieve clamping. Of course, in principle, only one can be provided, which cooperates with the housing of the upper part 61, so that a clamping effect is achieved.

Specifically, the position of the starting clamping block 212 close to the pen inlet is provided with an arc-shaped groove surface 214, and the thickness of the arc-shaped groove surface 214, which is formed by the whole of the upper side and the lower side, is increased towards the middle, namely, the middle distance from the pen inlet is the farthest from the upper side and the lower side, and the middle is nearest; the arc surface is arc-shaped from left to right. The arc-shaped groove surface 214 can better guide the pencil to be cut to enter, and can also better push the starting clamping block 212 open.

The gear adjusting structure comprises a gear adjusting part 41, a pen assisting block 42 and a gear guide 43, wherein the gear adjusting part 41 controls the pen assisting block 42 to move through the gear guide 43 so as to control the length of a pen point to be sharpened. Namely, a pen-assisting block 42 is arranged at the penpoint cutting part where the knife rest 3 operates to limit the length of the penpoint. The pen-assisting block 42 is pushed and limited in moving distance by the gear guide 43. The pen-assisting block 42 is thus arranged in a corresponding space of the holder 3 and can be moved in this space. In general, the gear guide 43 is axially movable, and an auxiliary fixing member 45 is provided on the outer side thereof in order to protect the gear guide 43. The detachable pencil sharpener is convenient to detach and install, and different positions corresponding to the detachable pencil sharpener are divided, so that the detachable pencil sharpener can be better detached and installed integrally and maintained later.

The gear position adjusting portion 41 is a circular cylindrical gear as a whole, and the height of the gear portion 411 is gradually increased, and the highest portion is the same as the middle position of the gear position adjusting portion 41 (i.e., the highest portion of the gear portion 411 is the same as the height of the gear position adjusting portion 41 and extends a certain distance). I.e., the distance that the gear guide 43 is pushed is formed at the height of the gear part 411, thereby limiting the distance that the pen-assisting block 42 moves.

Preferably, the gear adjusting structure further comprises an adjusting piece 44, wherein the adjusting piece 44 adopts a gear, and the gear is in contact fit with the gear adjusting part 41; the lower part 63 of the detachable pencil holder is provided with a notch 631 exposing the adjusting member 44. Thus, the user can rotate the adjusting member 44 through the notch 631, so that the gear of the adjusting member 44 is linked with the circular cylindrical gear to realize the height selection of the gear part 411, and further control the pen assisting block 42 to realize the limitation of the pen point length.

The lower part 63 of the detachable penholder is provided with a support column 632 for supporting the adjusting piece 44, the whole support column 632 is in a circular column shape, and the outer side of the support column 632 is provided with a limiting boss 633 so as to support the adjusting piece 44, thereby being convenient for adjusting and rotating and controlling the gear adjusting part 41.

The pen point protection structure at least comprises a limiting turntable 114, a driving fluted disc 119 and a delay connection structure 51, wherein the delay connection structure 51 controls linkage of the limiting turntable 114 and the driving fluted disc 119. Both the limit turntable 114 and the drive fluted disc 119 are dual-purpose parts. The limit turntable 114 and the driving fluted disc 119 are connected by the time delay connecting structure 51, and when the limit turntable and the driving fluted disc 119 are communicated, the pencil sharpener is in a working state. After the pencil sharpener is finished, the delay connection structure 51 can disconnect the drive fluted disc 119 and rotate for a while, the limit turntable 114 does not work any more, and at the moment, the pencil to be sharpened can rotate along with the drive fluted disc 119 and cannot be limited by the limit turntable 114, so that the pencil point protection function of the pencil to be sharpened is achieved. When the pencil is cut, the pencil is cut immediately to cause the damage of the cut pencil point, and the phenomenon of barbs can not occur in the scheme. I.e. the condition similar to the idling of the pencil to be cut occurs, so as to protect the nib of the pencil to be cut.

Specifically, the delay connection structure 51 may be a complete whole rod, or may be a two-stage structure for convenient disassembly, as shown in fig. 18 and 19.

As shown in fig. 20 to 24, the delay connection structure 51 includes a linkage rotating rod 52 and a control box 53, and the control box 53 controls the axial movement of the linkage rotating rod 52, so as to control the connection of the limit turntable 114 and the driving fluted disc 119. One end of the linkage rotating rod 52, which is close to the limiting turntable 114, is provided with a gear, and the driving fluted disc 119 and the limiting turntable 114 are linked through the end. When the link lever 52 moves downward, the end near the limit turntable 114 is caused to contact the drive sprocket 119 only.

Preferably, the end of the linkage rotating rod 52 far away from the limiting turntable 114 is provided with threads, the control box 53 comprises a control box body 531 and a delay block 532, and the control box body 531 controls the position where the delay block 532 extends into the linkage rotating rod 52 to be provided with threads. Thereby forming a lead screw-like structure that controls the axial movement of the linkage rod 52.

The control box body 531 includes control frame 5311 and drive block 5312, and the time delay piece 532 takes place to remove according to drive block 5312, and the direction of movement of time delay piece 532 is different with the direction of movement of drive block 5312, all sets up the chamfer on time delay piece 532, the drive block 5312, and both pass through the chamfer contact. Namely, the delay block 532 is controlled to move in the direction of the link lever 52 by the up-and-down movement of the driving block 5312. Namely, the linkage rotating rod 52, the delay block 532 and the driving block 5312 are combined into a clutch structure, so that the communication and disconnection of the delay connecting structure 51, the driving fluted disc 119 and the limiting rotary disc 114 are controlled.

The control box body 531 further includes a delay spring 5313, the delay spring 5313 being connected to one end of the control frame 5311 and one end of the delay block 532. Functioning to reset the delay block 532 to the home position. The delay block 532 includes a delay block body 53121, a spring connection end 53122 connected to the delay spring 5313, and a delay guide block 53123, and the control frame 5311 is provided with a corresponding notch 53111 to enable the delay guide block 53123 to be in a corresponding position and guide movement of the entire delay block 532. A switch for controlling the motor can be arranged near the delay guide block 53123 to give a signal of the corresponding pencil sharpening progress.

Preferably, the delay connection structure 51 further includes a gear adjusting structure, and the gear adjusting part 41 of the gear adjusting structure provides a force for moving the driving block 5312, that is, the gear adjusting structure moves down as a whole during pencil sharpening, so as to generate a force for moving the driving block 5312. The gear adjusting structure of this kind also has two functions, the other of which has been described in the foregoing.

As shown in fig. 25 to 28, the time delay connection structure 51 is similar to that shown in fig. 20 to 24 as a whole. The driving block 5312 is integrated with the gear adjusting portion 41, a circular column is arranged at the middle position of one side, far away from the upper portion 61, of the gear adjusting portion 41, a limiting convex disc is arranged below the circular column in a protruding mode, the limiting convex disc is connected through a corresponding spring, and a guide column is arranged at the middle position of the limiting convex disc. Wherein the guide posts can limit the corresponding springs from deviating. An end of the circular column protruding away from the gear position adjusting portion 41 is provided with an annular chamfer instead of the driving block 5312.

Preferably, the control box body 531 may be provided with a corresponding guide sliding region according to the shape of the driving block 532.

In summary, this scheme will wait to cut the pen and insert the pen along the import of pencil sharpener, can trigger the self-starting structure this moment, and the motor rotates, drives automatic pencil feeding structure and presss from both sides tight pen, and the length of nib can be through gear adjustment structure can electrodeless regulation at any time. When the pencil to be shaved is shaved, the unit adjusting structure pressed down triggers the pencil point protecting structure, so that the result similar to idling is caused, and the shaved pencil is better protected. After the pencil is taken out, the pencil sharpener is restored to the original state.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. An automatic boosting pen structure with nib protection is characterized by comprising an automatic pen feeding structure, a self-starting structure, a cutter rest, a gear adjusting structure, a nib protection structure and a detachable penholder;

the detachable pencil sharpening rack comprises an upper part, a middle part and a lower part, the automatic pencil feeding structure is arranged at the upper part, the tool rest is arranged at the middle part, the gear adjusting structure is arranged at the lower part, and the self-starting structure and the pencil point protecting structure penetrate through the upper part, the middle part and the lower part;

the automatic pen feeding structure compatible with various pen sizes comprises at least two clamping units, and the clamping units form a rotary pattern; the clamping unit axially moves within a certain range; the clamping unit comprises a clamping limit sleeve, a clamping rotating wheel, a clamping tooth rotating sleeve, a limit rotating disc and a clamping polished rod, wherein the clamping limit sleeve, the clamping rotating wheel and the clamping tooth rotating sleeve are sequentially sleeved on the clamping polished rod, the limit rotating disc is arranged below the clamping polished rod, and a gear on the limit rotating disc is in contact with the clamping tooth rotating sleeve; the clamping rotating wheel is made of rubber materials; friction blocks are distributed on the contact surfaces of the clamping limiting sleeve, the clamping rotating tooth sleeve and the clamping rotating wheel, and the friction blocks are integrally triangular columns; a clamping limit boss is arranged on one side of the clamping rotary tooth sleeve, which is close to the clamping rotary wheel, and the section of the clamping limit boss is isosceles trapezoid, and the whole clamping limit boss is arc-shaped; the clamping unit further comprises a clamping sleeve, wherein the clamping sleeve is arranged at the middle part of the clamping polished rod and is positioned at the inner side of the clamping rotating wheel; the clamping sleeve is a plastic piece, and a certain distance is reserved between the clamping sleeve and the clamping limiting sleeve as well as between the clamping rotating tooth sleeve; the driving fluted disc is matched with the limiting rotary disc, and a buckle is arranged in the middle of the driving fluted disc and used for limiting the limiting rotary disc and connecting other parts of the pencil sharpener;

the self-starting structure comprises a starting clamping piece, a starting connecting piece and a starting switch, wherein the starting clamping piece starts the starting switch through the starting connecting piece; the starting clamping piece moves under external force, the starting connecting piece moves according to the starting clamping piece, the moving direction of the starting clamping piece is different from that of the starting connecting piece, the starting clamping piece and the starting connecting piece are both provided with chamfer surfaces, and the starting clamping piece and the starting connecting piece are contacted through the chamfer surfaces; the starting connecting piece comprises a resetting connecting rod and a guide rod, and a certain distance is reserved between the resetting connecting rod and the guide rod; the reset connecting rod is integrally F-shaped and comprises a first reset cross rod, a second reset cross rod, a reset vertical rod and a reset spring, wherein the second reset cross rod is fixed at a certain position of the reset spring, and one end of the reset spring is fixed at one side of the first reset cross rod, which is close to the second reset cross rod; a mounting groove is formed in the upper part of the detachable penholder and corresponds to the second reset cross rod, and the second reset cross rod moves in the mounting groove; the starting clamping piece comprises a starting guide block, a starting clamping block and a starting spring, wherein the starting guide block is fixedly connected to one side, close to the starting connecting piece, of the starting clamping block, and the starting spring is arranged above the starting guide block; the starting guide block is contacted with the reset connecting rod; the contact position of the starting guide block and the reset connecting rod is provided with a bevel; the position of the starting clamping block close to the pen inlet is provided with an arc-shaped groove surface, and the thickness of the arc-shaped groove surface, which is formed by the whole of the arc-shaped groove surface, is increased from the upper side to the lower side towards the middle, namely, the middle distance from the pen inlet is the farthest from the upper side and the lower side, and the middle is nearest; the arc-shaped surface is arc-shaped from left to right; wherein at least 1 of the grippers are actuated; the starting switch controls the motor of the pencil sharpener to work;

the pen point protection structure comprises a clamping tooth rotating sleeve, a driving fluted disc and a delay connection structure, wherein the delay connection structure controls the linkage of the clamping tooth rotating sleeve and the driving fluted disc; the time delay connection structure comprises a linkage rotating rod and a control box, and the control box controls the axial movement of the linkage rotating rod, so that the connection of the clamping tooth sleeve and the driving tooth disc is controlled; the end of the linkage rotating rod, which is close to the clamping rotary tooth sleeve, is provided with a gear, and the driving fluted disc and the clamping rotary tooth sleeve are linked through the end; the control box comprises a control box body and a delay block, wherein the control box body controls the delay block to extend into the position where the linkage rotating rod is provided with the threads; the control box body comprises a control frame and a driving block, the delay block moves according to the driving block, the moving direction of the delay block is different from that of the driving block, the delay block and the driving block are both provided with chamfer surfaces, and the delay block and the driving block are contacted through the chamfer surfaces; the control box body further comprises a delay spring, and the delay spring is connected with one end of the control frame and one end of the delay block; the delay block comprises a delay block body, a spring connecting end connected with a delay spring and a delay guide block, and a control frame is provided with a notch which is suitable for the delay block body; the delay connection structure also comprises a gear adjusting structure, and a gear adjusting part of the gear adjusting structure provides a force for the driving block to move;

the gear adjusting structure comprises a gear adjusting part, a pen assisting block and a gear guide piece, wherein the gear adjusting part controls the pen assisting block to move through the gear guide piece so as to control the length of a pen point; the pen assisting block is arranged in the corresponding space of the tool rest and can move in the space.