Pencil sharpener

Abstract

The utility model discloses a pencil sharpener which comprises a shell, the shell is provided with a cavity and a pencil inlet communicated with the cavity, a cutting mechanism is installed in the cavity in a rotating mode, the cutting mechanism can rotate relative to the shell under stress, a rotation stopping mechanism in linkage with the cutting mechanism is further installed in the cavity, and the pencil inlet is communicated with the cavity. The rotation stopping mechanism enables the cutting mechanism to rotate in one direction, a separation structure is arranged between the rotation stopping mechanism and the cutting mechanism and divides the cavity into a first containing cavity and a second containing cavity, the rotation stopping mechanism is located in the first containing cavity, and the cutting mechanism is located in the second containing cavity. The separation structure limits pencil scraps generated by the cutting mechanism in the second containing cavity, the rotation stopping mechanism and the cutting mechanism are separated by arranging the separation structure, the pencil scraps generated by pencil sharpening of the cutting mechanism cannot affect the rotation stopping mechanism, the use efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, more specifically to a pencil sharpener. Background Art

[0002] A pencil is a hand-held tool commonly used for writing or drawing. It uses graphite as a lead and is coated with a wood layer on the outside of the lead. Before using the pencil or after using it for a period of time, the wood layer must be shaved to expose the lead to the outside. Manual shaving is time-consuming and laborious. Currently, most people use a pencil sharpener, which is a tool for cutting and sharpening pencils. The blade moves relative to the inserted pencil to shave off the wood layer on the outer wall of the pencil to expose the lead. Since the blade is fixed, the blade moves relative to the pencil to complete the cutting of the pencil. Therefore, the pencil can only move relative to the blade through unidirectional rotation. However, the angle of rotation of the pencil by the wrist when holding the pencil manually is limited. When the wrist is rotated to the limit angle, the pencil needs to be released and re-held and the above-mentioned action needs to be repeated so that the pencil and the blade continue to move relative to each other to achieve cutting.

[0003] In response to the above problems, the applicant has submitted a utility model application entitled "A pencil sharpener with one-way anti-rotation function" to the State Patent Office, with application number "CN202322609475.8", which includes a shell and a knife seat, a blade is installed on the knife seat, and the knife seat is provided with a connected pen inlet and a pencil sharpening groove, the knife seat is rotatably installed in the shell, the knife seat is connected to a transmission member, the transmission member rotates synchronously with the knife seat, a anti-rotation member that limits the one-way rotation of the transmission member is slidably installed in the shell, the anti-rotation member is connected to a reset elastic member, and when the knife seat drives the transmission member to rotate in a first direction, the transmission member and the anti-rotation member act relative to each other so that the anti-rotation member is forced to slide The knife holder is movable and retracted, and the knife seat is rotatable in the shell body. When the knife holder drives the transmission member to rotate in a second direction opposite to the first direction, the transmission member abuts against the anti-rotation member, and the anti-rotation member remains extended under the action of the reset elastic member, and the knife holder is limited in rotation in the shell body. When using the pencil sharpener to sharpen a pencil, the hand can keep holding the pen shaft without changing the force application position. In this way, the pencil can be cut by reciprocating the rotation of the pencil. However, this pencil sharpener has a anti-rotation member connected to the knife holder. The debris generated by the cutting of the knife holder is easy to enter between the anti-rotation member and the transmission member, thereby interfering with the normal rotation of the transmission member, affecting the anti-rotation effect, and making the parts easy to wear, affecting the service life of the pencil sharpener. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pencil sharpener, which separates a rotation-stopping mechanism from a cutting mechanism by arranging a separation structure, so that pencil shavings generated by the cutting mechanism when sharpening pens will not affect the rotation-stopping mechanism, thereby improving the use efficiency and service life.

[0005] The utility model provides a pencil sharpener, comprising a shell, wherein the shell is provided with a cavity and a pen inlet communicated with the cavity, a cutting mechanism is rotatably installed in the cavity, the cutting mechanism can rotate relative to the shell when subjected to force, a rotation-stopping mechanism linked to the cutting mechanism is also installed in the cavity, the rotation-stopping mechanism enables the cutting mechanism to rotate in one direction, a partition structure is provided between the rotation-stopping mechanism and the cutting mechanism, the partition structure divides the cavity into a first accommodating chamber and a second accommodating chamber, the rotation-stopping mechanism is located in the first accommodating chamber, the cutting mechanism is located in the second accommodating chamber, and the partition structure limits pencil shavings generated by the cutting mechanism to the second accommodating chamber.

[0006] In the technical solution, a cutting mechanism and a rotation-stopping mechanism are installed in the cavity of a shell, a pen to be cut is inserted into the cutting mechanism through a pen inlet, and a user holds the pen shaft and rotates it, so that the cutting mechanism is rotated by force, and the rotation-stopping mechanism enables the cutting mechanism to rotate in only one direction, that is, when the user holds the pen shaft and rotates it in a first direction, the cutting mechanism is subjected to a force of rotation in the first direction, and at this time, the rotation-stopping mechanism is subjected to a rotational force of the cutting mechanism and avoids the cutting mechanism, so that the cutting mechanism can rotate in the cavity, so that the cutting mechanism and the pen shaft both rotate synchronously in the first direction, and idling occurs between the cutting mechanism and the pen shaft, so that the cutting mechanism cannot complete the pencil sharpening, and when the user holds the pen shaft and rotates it in a second direction opposite to the first direction, the cutting mechanism The anti-rotation mechanism is subjected to a force rotating in the second direction. At this time, the anti-rotation mechanism is not affected by the force rotating in the second direction. The anti-rotation mechanism maintains a state of rotation locking with the cutting mechanism, so that the cutting mechanism cannot rotate in the housing. Therefore, the cutting mechanism can rotate relative to the pen holder to complete the pencil sharpening. The anti-rotation mechanism in this solution can refer to the ratchet principle, wherein the first direction can be selected as the counterclockwise direction, and the second direction can be selected as the clockwise direction, which is more suitable for the user to apply force to rotate and more ergonomically designed. The user does not need to loosen the pencil and can rotate along the first direction to rotate the wrist to the initial position. In this way, the pencil can be sharpened by reciprocating the pencil, which is more labor-saving to use. The cutting mechanism and the anti-rotation mechanism have simple structures, high transmission efficiency and labor-saving installation.

[0007] In the present scheme, a partition structure is provided between the anti-rotation mechanism and the cutting mechanism, and the installation cavity is divided into a first accommodating cavity and a second accommodating cavity by the partition structure. The anti-rotation mechanism is accommodated in the first accommodating cavity and the cutting mechanism is accommodated in the second accommodating cavity, so as to separate the anti-rotation mechanism and the cutting mechanism. The pencil shavings generated by the cutting mechanism when sharpening the pencil are stored in the second accommodating cavity. Due to the blocking effect of the partition structure, the pencil shavings cannot enter the first accommodating cavity, thereby preventing the anti-rotation mechanism from being affected by the pencil shavings and being unable to stop normally in one direction, thereby improving the pencil sharpening efficiency and extending the service life of the pencil sharpener.

[0008] As an improvement, the cutting mechanism includes a knife seat and a mounting frame for mounting the knife seat, a blade is mounted on the knife seat, a connecting seat is provided on the mounting frame, the mounting frame is rotatably mounted in the cavity through the connecting seat, the knife seat is located on one side of the connecting seat, and the anti-rotation mechanism is located on the other side of the connecting seat. In this technical solution, the knife seat with the blade is installed by setting the mounting frame, the pen is inserted into the knife seat in sequence along the pen feeding direction through the pen feeding port to contact the blade, the user rotates the pen holder to make the pen holder and the blade rotate relative to each other, so that the wood layer on the outside of the pen holder is cut off and the pen core on the inside of the pen holder is exposed, the cutting mechanism is simple and efficient, by setting the connecting seat on the mounting frame, the mounting frame is rotatably mounted in the cavity through the connecting seat, that is, the mounting frame can rotate in the cavity through the connecting seat, the structure is simple, the installation is reliable, the pen shavings generated by the cutting mechanism come from the blade on the knife seat, the knife seat and the anti-rotation mechanism are respectively located on both sides of the connecting seat, the anti-rotation mechanism is separated from the knife seat by the connecting seat, so that the separation effect of the anti-rotation mechanism and the cutting mechanism is better, and the pen shavings are prevented from entering the anti-rotation mechanism, and the reliability of use is improved.

[0009] As an improvement, the inner wall of the shell is provided with a connecting ring adapted to the mounting frame, the mounting frame is rotatably mounted on the connecting ring, and the connecting ring is engaged with the connecting seat to form a separation structure. In this technical solution, by providing a connecting ring on the inner wall of the shell, the connecting ring is rotatably connected with the mounting frame, so that the tool holder is subjected to force to drive the mounting frame to rotate synchronously, and the separation structure is formed by the connection of the connecting seat and the connecting ring. The separation structure is simple and reliable, and the connection seat and the connecting ring can cooperate to completely separate the cutting mechanism and the anti-rotation mechanism, and the separation effect is better.

[0010] As an improvement, the anti-rotation mechanism includes a limit structure and an anti-rotation member, the limit structure is arranged on the connecting seat, and the limit structure cooperates with the anti-rotation member to enable the mounting frame to rotate in one direction. In this technical solution, the anti-rotation mechanism is used to control the cutting mechanism to rotate in only one direction. By setting the anti-rotation mechanism to be composed of the limit structure and the anti-rotation member, and setting the limit structure on the connecting seat, the installation space is saved, which is conducive to reducing the size of the pencil sharpener, and the linkage coordination efficiency between the anti-rotation mechanism and the cutting mechanism is higher. The limit structure cooperates with the anti-rotation member to control the mounting frame and the knife seat to rotate in the first direction and rotate in the second direction. The anti-rotation mechanism refers to the ratchet principle, with a simple structure and efficient transmission.

[0011] As an improvement, the present application can provide a specific anti-rotation mechanism, wherein the anti-rotation member is slidably installed in the first accommodating cavity, and the anti-rotation member is connected to a reset elastic member. When the tool holder is forced to drive the mounting frame to rotate along a first direction, the limiting structure rotates to act on the end of the anti-rotation member, so that the anti-rotation member is forced to compress the reset elastic member to slide and retract, and the tool holder is rotatable in the shell. When the tool holder drives the mounting frame to rotate in a second direction opposite to the first direction, the limiting structure abuts against the side wall of the anti-rotation member, and the anti-rotation member remains extended under the action of the reset elastic member, and the tool holder is limited in rotation in the shell.

[0012] In the present technical scheme, a stopper is arranged to be slidable in the first accommodating cavity, the stopper cooperates with the limiting structure by sliding and retracting, and the stopper is connected to a reset elastic member, through which the stopper can be slid and reset. When the user holds the pen holder and rotates it in the first direction, the knife seat and the mounting frame are subjected to a force to rotate in the first direction, and the limiting structure acts on the end of the stopper by rotating in the first direction, so that the stopper is subjected to force to compress the elastic reset member and slide and retract, and the knife seat and the mounting frame can rotate in the first direction in the shell body, and idling occurs between the knife seat and the pen holder. When the user holds the pen holder and rotates it in the second direction, the knife seat and the mounting frame are subjected to a force to rotate in the second direction, the stopper abuts against the limiting structure through the side wall and is not affected by the rotation force in the second direction, and the stopper remains extended under the action of the reset elastic member, so that the knife seat and the mounting frame cannot rotate in the second direction in the shell body, and the pen holder can rotate relative to the knife seat to complete the pencil sharpening. The stopper mechanism has a simple structure and high transmission efficiency.

[0013] As an improvement, the limiting structure is a plurality of protrusions arranged on the connecting seat, the plurality of protrusions are arranged continuously along the circumference of the connecting seat, and gaps for inserting a stopper are formed between adjacent protrusions. The end of the stopper is provided with a first guide slope adapted to the protrusion, and the stopper cooperates with the protrusion through the first guide slope to slide and retract.

[0014] In the present technical solution, a limiting structure is provided which is composed of a plurality of protrusions arranged continuously along the circumference of the connecting seat, and a gap for inserting a stopper is formed between adjacent protrusions. The stopper is inserted into the gap to abut against the side wall of the protrusion to limit the rotation of the limiting structure. A first guide slope is provided at the end of the stopper that cooperates with the protrusion, and the stopper can slide and retract through the cooperation of the first guide slope and the protrusion. When the protrusion rotates along the first direction, the protrusion abuts against the first guide slope of the stopper through rotation and moves relatively along the first guide slope. The first guide slope and the protrusion are in point-to-surface contact, so that the stopper can be affected When the projection is completely disengaged from the first guide slope, the stop member is inserted into the gap under the action of the reset elastic member. If the limiting structure continues to rotate in the first direction, the above-mentioned action is repeated. When the projection rotates in the second direction, the projection abuts against the side wall of the stop member through rotation, and the side wall of the projection abuts against the side wall of the stop member. There is surface contact between the projection and the stop member, and the limiting structure cannot push the stop member to slide backward to avoid positioning. The projection is limited by the stop member and cannot continue to rotate in the second direction. Therefore, the stop member can realize the function of rotation limitation in the second direction, with a simple structure and high transmission efficiency.

[0015] As an improvement, the present application can also provide another specific anti-rotation mechanism, wherein the limiting structure is a bevel gear ring arranged on the connecting seat, and the anti-rotation member is an elastic rib arranged on the inner wall of the shell. When the knife seat is subjected to force to drive the mounting frame to rotate in a first direction, the rotation of the bevel gear ring acts on the end of the elastic rib, so that the elastic rib is elastically deformed under force, and the knife seat can rotate in the shell. When the knife seat drives the mounting frame to rotate in a second direction opposite to the first direction, the end of the elastic rib abuts against the recessed part of the bevel gear ring, and the knife seat is limited in rotation in the shell.

[0016] In the present technical scheme, a limiting structure is set as a bevel gear ring and a stopper is set as an elastic rib. The bevel gear ring is composed of a plurality of bevel teeth arranged continuously along the circumference of the connecting seat, and a recess is formed between adjacent bevel teeth. The elastic rib is inclined so that the elastic rib can only undergo elastic deformation when subjected to a force in a first direction. When the bevel gear ring rotates along the first direction, the bevel gear ring abuts against the end of the elastic rib by rotating, and the end of the elastic rib undergoes elastic deformation by being subjected to the force in the first direction. The elastic rib avoids the bevel teeth by elastic deformation, and the bevel gear ring can rotate normally in the first direction, thereby allowing the mounting frame and the knife seat to rotate in the shell. When the bevel gear ring rotates along the second direction, the bevel gear ring rotates so that the end of the elastic rib enters the recess, and the elastic rib is not affected by the force in the second direction. The elastic rib abuts against the recess of the bevel gear ring through the end, and the bevel gear ring is limited by the elastic rib and cannot continue to rotate in the second direction. Therefore, the stopper can realize the function of limiting rotation in the second direction, and the structure is simple and the transmission efficiency is high.

[0017] As an improvement, the shell body is movably provided with a first ash baffle and a second ash baffle adapted to the pen inlet, and the first ash baffle and the second ash baffle cooperate to open and close the pen inlet, and the first ash baffle and the second ash baffle are both located between the pen inlet and the anti-rotation mechanism. In the present technical scheme, the pen inlet is mainly used to insert the pen holder so that the pen holder can enter the cutting mechanism for sharpening the pen. The pen inlet connects the cavity and the outside. External debris and dust can easily enter the cavity through the pen inlet and affect the normal operation of the anti-rotation mechanism and the cutting mechanism. By installing the first ash baffle and the second ash baffle in the shell body, the first ash baffle and the second ash baffle can open and close the pen inlet through movably cooperating, and the first ash baffle and the second ash baffle are installed between the pen inlet and the anti-rotation mechanism to isolate the pen inlet from the anti-rotation mechanism, so that the anti-rotation mechanism can operate normally, thereby increasing the service life of the pencil sharpener.

[0018] As an improvement, a rotating cover is provided on the shell, the pen inlet is provided on the rotating cover, the shell is provided with a mounting portion, the first and second ash baffles are both slidably mounted in the mounting portion, the first and second ash baffles are both connected to the rotating cover, the rotating cover drives the first and second ash baffles to slide relative to each other by rotating, and the first and second ash baffles open and close the pen inlet by sliding relative to each other. In the technical solution, a rotating cover is provided on the shell, the rotating cover is subjected to force to rotate relative to the shell, a mounting portion capable of slidably mounting the first and second ash baffles is provided on the shell, the first and second ash baffles are both linked to the rotating cover, the rotating cover is subjected to force to drive the first and second ash baffles to slide by rotating, and the first and second ash baffles open and close the pen inlet by sliding, the structural design is ingenious, and the rotation drive is labor-saving.

[0019] As an improvement, the first dust baffle is provided with a first connecting shaft, the second dust baffle is provided with a second connecting shaft, the mounting portion is provided with a first linear slide rail and a second linear slide rail, the rotating cover is provided with a first arcuate slide rail and a second arcuate slide rail, the first connecting shaft passes through the first linear slide rail to connect to the first arcuate slide rail, and the second connecting shaft passes through the second linear slide rail to connect to the second arcuate slide rail.

[0020] In the technical solution, the first ash baffle plate and the second ash baffle plate are both linked with the rotating cover to convert the rotational motion into the linear motion, by arranging the first connecting shaft on the first ash baffle plate, arranging the first linear slide rail which slidably cooperates with the first connecting shaft on the mounting portion, arranging the first arcuate slide rail which slidably cooperates with the first connecting shaft on the rotating cover, the first connecting shaft passes through the first linear slide rail and is inserted into the first arcuate slide rail, by arranging the second connecting shaft on the second ash baffle plate, arranging the second linear slide rail which slidably cooperates with the second connecting shaft on the mounting portion, arranging the first arcuate slide rail which slidably cooperates with the first connecting shaft on the rotating cover The second arc slide rail is matched with the shaft for sliding cooperation, and the second connecting shaft passes through the second linear slide rail and is inserted into the second arc slide rail. The user applies force to the rotating cover to rotate the rotating cover, and the first arc slide rail acts on the first connecting shaft so that the first connecting shaft is forced to slide along the first linear slide rail, and the second arc slide rail acts on the second connecting shaft so that the second connecting shaft is forced to slide along the second linear slide rail. The first dust baffle and the second dust baffle are moved closer together to close the pen inlet by relative sliding, and the first dust baffle and the second dust baffle are moved away from each other to open the pen inlet. The structural design is ingenious and labor-saving to use.

[0021] The above technical solutions can be combined arbitrarily based on the common knowledge in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention discloses a three-dimensional structural schematic diagram of a pencil sharpener.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of Example 2 of the present disclosure.

[0024] Figure 3 This is a schematic diagram of the explosion structure of Example 2 of the present disclosure.

[0025] Figure 4 It is a schematic diagram of the partial structure of the shell in Example 2 of the present disclosure.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the mounting frame and the anti-rotation mechanism in Example 2 of the present disclosure.

[0027] Figure 6 It is a cross-sectional schematic diagram of embodiment 3 of the present disclosure.

[0028] Figure 7 It is a schematic diagram of the partial structure of the shell in Example 3 of the present disclosure.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating cover in the present disclosure.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the pencil sharpener of the present disclosure after the rotating cover is removed.

[0031] As shown in the figure: 1. Shell; 11. Pen inlet; 12. Partition structure; 13. First accommodating chamber; 14. Second accommodating chamber; 15. Connecting ring; 16. First dust baffle; 161. First connecting shaft; 17. Second dust baffle; 171. Second connecting shaft; 18. Rotating cover; 181. First arcuate slide rail; 182. Second arcuate slide rail; 19. Mounting part; 191. First linear slide rail; 192. Second linear slide rail; 2. Cutting mechanism; 21. Knife seat; 22. Blade; 23. Mounting frame; 231. Connecting seat; 3. Anti-rotation mechanism; 31. Limiting structure; 311. Interval; 312. Recess; 32. Anti-rotation member; 321. First guide ramp; 33. Resetting elastic member. DETAILED DESCRIPTION

[0032] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0033] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0034] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0035] Example 1

[0036] like Figures 1 to 9 As shown, the present application discloses a pencil sharpener, comprising a shell 1, wherein the shell 1 is provided with a cavity and a pen inlet 11 connected with the cavity, wherein a cutting mechanism 2 is rotatably installed in the cavity, and the cutting mechanism 2 can rotate relative to the shell 1 under force, and a rotation-stopping mechanism 3 linked with the cutting mechanism 2 is also installed in the cavity, and the rotation-stopping mechanism 3 enables the cutting mechanism 2 to rotate in one direction. By installing the cutting mechanism 2 and the rotation-stopping mechanism 3 in the cavity of the shell 1, a pen to be cut is inserted into the cutting mechanism 2 through the pen inlet 11, and a user holds the pen holder and rotates it, so that the cutting mechanism 2 is rotated under force, and the rotation-stopping mechanism 3 enables the cutting mechanism 2 to rotate only in one direction, that is, when the user holds the pen holder and rotates it in a first direction, the cutting mechanism 2 is subjected to a force of rotation in the first direction, and at this time, the rotation-stopping mechanism 3 is subjected to a rotation force of the cutting mechanism 2 and avoids the cutting mechanism 2, so that the cutting mechanism 2 can rotate in the cavity, so that the cutting mechanism 2 and the pen holder both rotate synchronously in the first direction, and idling occurs between the cutting mechanism 2 and the pen holder, and the cutting mechanism 2 cannot complete the pencil sharpening;

[0037] When the user holds the pen holder and rotates it in a second direction opposite to the first direction, the cutting mechanism 2 is subjected to a force to rotate in the second direction. At this time, the anti-rotation mechanism 3 is not affected by the rotation force in the second direction. The anti-rotation mechanism 3 remains in a rotationally locked state with the cutting mechanism 2, so that the cutting mechanism 2 cannot rotate in the housing 1. Therefore, the cutting mechanism 2 can rotate relative to the pen holder to complete the pencil sharpening. The anti-rotation mechanism 3 in this solution can refer to the ratchet principle, wherein the first direction can be selected as the counterclockwise direction, and the second direction can be selected as the clockwise direction, which is more suitable for the user to apply force to rotate and more ergonomically designed. The user does not need to release the pencil and can rotate it in the first direction to rotate the wrist to the initial position. In this way, the pencil can be sharpened by reciprocating the pencil, which is more labor-saving to use. In addition, the cutting mechanism 2 and the anti-rotation mechanism 3 have simple structures, high transmission efficiency, and labor-saving installation.

[0038] like Figure 2 and Figure 6 As shown, a partition structure 12 is provided between the anti-rotation mechanism 3 and the cutting mechanism 2, and the partition structure 12 divides the cavity into a first accommodating chamber 13 and a second accommodating chamber 14. The anti-rotation mechanism 3 is located in the first accommodating chamber 13, and the cutting mechanism 2 is located in the second accommodating chamber 14. The partition structure 12 limits the pencil shavings generated by the cutting mechanism 2 to the second accommodating chamber 14. A partition structure 12 is provided between the anti-rotation mechanism 3 and the cutting mechanism 2, and the installation cavity is divided into a first accommodating chamber 13 and a second accommodating chamber 14 by the partition structure 12. The anti-rotation mechanism 3 is accommodated in the first accommodating chamber 13, and the cutting mechanism 2 is accommodated in the second accommodating chamber 14, so as to separate the anti-rotation mechanism 3 and the cutting mechanism 2, and the pencil shavings generated by the cutting mechanism 2 when sharpening a pencil are stored in the second accommodating chamber 14. Under the blocking effect of the partition structure 12, the pencil shavings cannot enter the first accommodating chamber 13, thereby preventing the anti-rotation mechanism 3 from being affected by the pencil shavings and being unable to stop normally in one direction, thereby improving the pencil sharpening efficiency and extending the service life of the pencil sharpener.

[0039] More specifically, Figure 3As shown, the cutting mechanism 2 includes a knife seat 21 and a mounting frame 23 for mounting the knife seat 21. A blade 22 is mounted on the knife seat 21. A connecting seat 231 is provided on the mounting frame 23. The mounting frame 23 is rotatably mounted in the cavity through the connecting seat 231. The knife seat 21 is located on one side of the connecting seat 231, and the anti-rotation mechanism 3 is located on the other side of the connecting seat 231. The knife seat 21 with the blade 22 is installed by providing the mounting frame 23. The pen is sequentially inserted into the knife seat 21 through the pen inlet 11 along the pen feeding direction to contact the blade 22. The user rotates the pen shaft so that the pen shaft and the blade 22 rotate relative to each other, thereby cutting off the wood layer on the outer side of the pen shaft and the pen shaft. The inner lead is exposed, and the cutting mechanism 2 is simple and efficient. A connecting seat 231 is provided on the mounting frame 23, and the mounting frame 23 is rotatably installed in the cavity through the connecting seat 231, that is, the mounting frame 23 can be rotated in the cavity through the connecting seat 231. The structure is simple and the installation is reliable. The pencil shavings generated by the cutting mechanism 2 come from the blade 22 on the knife seat 21. The knife seat 21 and the anti-rotation mechanism 3 are respectively located on both sides of the connecting seat 231. The anti-rotation mechanism 3 is separated from the knife seat 21 through the connecting seat 231, so that the separation effect of the anti-rotation mechanism 3 and the cutting mechanism 2 is better, and pencil shavings are prevented from entering the anti-rotation mechanism 3, thereby improving the reliability of use.

[0040] More specifically, Figure 2 and Figure 6 As shown, the inner wall of the shell 1 is provided with a connecting ring 15 adapted to the mounting frame 23. The mounting frame 23 is rotatably installed on the connecting ring 15. The connecting ring 15 is engaged with the connecting seat 231 to form a partition structure 12. By providing the connecting ring 15 on the inner wall of the shell 1, the connecting ring 15 is rotatably connected with the mounting frame 23, so that the tool holder 21 is subjected to force to drive the mounting frame 23 to rotate synchronously. The partition structure 12 is formed by the connection seat 231 and the connecting ring 15. The partition structure 12 is simple and reliable. The connection seat 231 cooperates with the connecting ring 15 to completely separate the cutting mechanism 2 and the anti-rotation mechanism 3, and the separation effect is better. In this embodiment, as shown in FIG. Figure 4 and Figure 7 As shown, the connecting ring 15 can be set to a single layer or a double layer. The single-layer connecting ring 15 is rotatably connected to the mounting frame 23, and the mounting frame 23 abuts against the connecting ring 15 through the connecting seat 231 to limit the installation. The double-layer connecting ring 15 is directly rotatably connected to the connecting seat 231, and the double-layer connecting ring 15 clamps the connecting seat 231 to limit the installation of the mounting frame 23. This embodiment does not limit this and can be selected according to actual conditions.

[0041] More specifically, Figure 3 and Figure 6As shown, the anti-rotation mechanism 3 includes a limiting structure 31 and a stopping member 32. The limiting structure 31 is arranged on the connecting seat 231. The limiting structure 31 cooperates with the stopping member 32 to make the mounting frame 23 rotate in one direction. The anti-rotation mechanism 3 is used to control the cutting mechanism 2 to rotate in only one direction. The anti-rotation mechanism 3 is composed of the limiting structure 31 and the stopping member 32. The limiting structure 31 is arranged on the connecting seat 231, which saves installation space, is conducive to reducing the size of the pencil sharpener, and makes the linkage cooperation efficiency between the anti-rotation mechanism 3 and the cutting mechanism 2 higher. The limiting structure 31 cooperates with the stopping member 32 to control the mounting frame 23 and the knife seat 21 to rotate in the first direction and rotate in the second direction. The anti-rotation mechanism 3 refers to the ratchet principle, with a simple structure and efficient transmission.

[0042] Example 2

[0043] like Figures 1 to 5 As shown, this embodiment provides a pencil sharpener based on embodiment 1, and the structure of the pencil sharpener is the same as that of embodiment 1, wherein the stopper 32 is slidably installed in the first accommodating cavity 13, and the stopper 32 cooperates with the limiting structure 31 by sliding and retracting, and the stopper 32 is connected with a reset elastic member 33, and the stopper 32 can be slid and reset by the reset elastic member 33, and when the knife seat 21 is driven by force to drive the mounting frame 23 to rotate along the first direction, the limiting structure 31 rotates to act on the end of the stopper 32, so that the stopper 32 is forced to compress the reset elastic member 33 to slide and retract, and the knife seat 21 is rotatable in the shell 1, and when the knife seat 21 drives the mounting frame 23 to rotate in a second direction opposite to the first direction, the limiting structure 31 abuts against the side wall of the stopper 32, and the stopper 32 remains extended under the action of the reset elastic member 33, and the knife seat 21 is rotated and limited in the shell 1;

[0044] When the user holds the pen shaft and rotates it in a first direction, the knife seat 21 and the mounting frame 23 are subjected to a force to rotate in the first direction, and the limiting structure 31 acts on the end of the anti-rotation member 32 by rotating in the first direction, so that the anti-rotation member 32 is forced to compress the elastic reset member and slide back, and the knife seat 21 and the mounting frame 23 can rotate in the first direction in the shell 1, and idling occurs between the knife seat 21 and the pen shaft. When the user holds the pen shaft and rotates it in a second direction, the knife seat 21 and the mounting frame 23 are subjected to a force to rotate in the second direction, and the anti-rotation member 32 abuts against the limiting structure 31 through the side wall and is not affected by the rotation force in the second direction. The anti-rotation member 32 remains extended under the action of the reset elastic member 33, so that the knife seat 21 and the mounting frame 23 cannot rotate in the second direction in the shell 1, and the pen shaft can rotate relative to the knife seat 21 to complete the pen sharpening. The anti-rotation mechanism 3 has a simple structure and high transmission efficiency.

[0045] More specifically, Figure 3 and Figure 5As shown, the limiting structure 31 is a plurality of protrusions arranged on the connecting seat 231, and the plurality of protrusions are continuously arranged along the circumference of the connecting seat 231, and a gap 311 for inserting the stopper 32 is formed between adjacent protrusions, and the end of the stopper 32 is provided with a first guide slope 321 adapted to the protrusion, and the stopper 32 cooperates with the protrusion through the first guide slope 321 to slide and retract, and the limiting structure 31 is provided with a plurality of protrusions continuously arranged along the circumference of the connecting seat 231, and a gap 311 for inserting the stopper 32 is formed between adjacent protrusions, and the stopper 32 is inserted into the gap 311 to abut against the side wall of the protrusion to limit the rotation of the limiting structure 31, and the first guide slope 321 is provided at the end of the stopper 32 that cooperates with the protrusion, and the stopper 32 can slide and retract through the cooperation of the first guide slope 321 and the protrusion;

[0046] When the protrusion rotates along the first direction, the protrusion abuts against the first guide slope 321 of the stop member 32 through rotation and moves relative to it along the first guide slope 321. The first guide slope 321 and the protrusion are in point-to-surface contact, so that the stop member 32 can be subjected to the force of sliding to avoid position. When the protrusion is completely disengaged from the first guide slope 321, the stop member 32 is inserted into the gap 311 under the action of the reset elastic member 33. If the limiting structure 31 continues to rotate along the first direction, the above-mentioned action is repeated. When the protrusion rotates along the second direction, the protrusion abuts against the side wall of the stop member 32 through rotation. The side wall of the protrusion abuts against the side wall of the stop member 32. There is surface-to-surface contact between the protrusion and the stop member 32. The limiting structure 31 cannot push the stop member 32 to slide backward to avoid position. The protrusion is limited by the stop member 32 and cannot continue to rotate in the second direction. Therefore, the stop member 32 can realize the function of rotation limiting in the second direction, with a simple structure and high transmission efficiency.

[0047] Example 3

[0048] like Figure 1 , Figure 6 and Figure 7As shown, this embodiment provides a pencil sharpener based on the embodiment 1, and the structure of the pencil sharpener is the same as that of the embodiment 1, wherein the limiting structure 31 is a helical tooth ring arranged on the connecting seat 231, and the rotation stopper 32 is an elastic rib arranged on the inner wall of the shell 1, and the limiting structure 31 is set as a helical tooth ring, and the rotation stopper 32 is set as an elastic rib, and the helical tooth ring is composed of a plurality of helical teeth arranged continuously along the circumference of the connecting seat 231, and a recess 312 is formed between adjacent helical teeth, and the elastic rib is inclinedly arranged so that the elastic rib can only be elastically deformed when subjected to a force in a first direction, and when the knife seat 21 is forced to drive the mounting frame 23 to rotate in the first direction, the rotation of the helical tooth ring acts on the end of the elastic rib, so that the elastic rib is elastically deformed under the force, and the knife seat 21 can rotate in the shell 1, and when the knife seat 21 drives the mounting frame 23 to rotate in a second direction opposite to the first direction, the end of the elastic rib abuts against the recess 312 of the helical tooth ring, and the knife seat 21 is rotationally limited in the shell 1;

[0049] When the bevel gear ring rotates along the first direction, the bevel gear ring abuts against the end of the elastic rib through rotation, and the end of the elastic rib is elastically deformed by the force in the first direction. The elastic rib avoids the bevel gear through elastic deformation, and the bevel gear ring can rotate normally along the first direction, so that the mounting frame 23 and the knife seat 21 can rotate in the shell 1. When the bevel gear ring rotates along the second direction, the bevel gear ring rotates so that the end of the elastic rib enters the recess 312, and the elastic rib is not affected by the force in the second direction. The elastic rib abuts against the recess 312 of the bevel gear ring through the end, and the bevel gear ring is limited by the elastic rib and cannot continue to rotate in the second direction. Therefore, the stop member 32 can realize the function of limiting the rotation in the second direction, and the structure is simple and the transmission efficiency is high.

[0050] Example 4

[0051] like Figures 1 to 9As shown, this embodiment provides a pencil sharpener based on any one of embodiments 1 to 3, and the structure of the pencil sharpener is the same as that of any one of embodiments 1 to 3, wherein a first ash baffle 16 and a second ash baffle 17 adapted to the pen inlet 11 are movably installed in the housing 1, and the first ash baffle 16 and the second ash baffle 17 cooperate to open and close the pen inlet 11, and the first ash baffle 16 and the second ash baffle 17 are both located between the pen inlet 11 and the anti-rotation mechanism 3, and the pen inlet 11 is mainly used to insert a pen holder so that the pen holder can enter the cutting mechanism 2 for pencil sharpening. The pen inlet 11 connects the cavity and the outside, and external debris and dust can easily enter the cavity through the pen inlet 11 to affect the normal operation of the anti-rotation mechanism 3 and the cutting mechanism 2. By installing a first dust baffle 16 and a second dust baffle 17 in the shell 1, the first dust baffle 16 and the second dust baffle 17 can open and close the pen inlet 11 through active cooperation, and the first dust baffle 16 and the second dust baffle 17 are installed between the pen inlet 11 and the anti-rotation mechanism 3 to isolate the pen inlet 11 from the anti-rotation mechanism 3, so that the anti-rotation mechanism 3 can operate normally and the service life of the pencil sharpener is improved.

[0052] More specifically, Figure 1 , Figure 8 and Fig. 9 As shown, a rotating cover 18 is provided on the housing 1, and the pen inlet 11 is provided on the rotating cover 18. The housing 1 is provided with a mounting portion 19. The first ash baffle 16 and the second ash baffle 17 are both slidably mounted in the mounting portion 19. The first ash baffle 16 and the second ash baffle 17 are both connected to the rotating cover 18. The rotating cover 18 drives the first ash baffle 16 and the second ash baffle 17 to slide relative to each other by rotating. The first ash baffle 16 and the second ash baffle 17 slide relative to each other to open and close the pen inlet 11. 1 is provided with a rotating cover 18, and the rotating cover 18 can rotate relative to the housing 1 under force. By providing a mounting portion 19 on which the first ash baffle 16 and the second ash baffle 17 can be slidably mounted on the housing 1, the first ash baffle 16 and the second ash baffle 17 are both arranged to be linked with the rotating cover 18, and the rotating cover 18 is driven to drive the first ash baffle 16 and the second ash baffle 17 to slide by rotating under force, and the first ash baffle 16 and the second ash baffle 17 open and close the pen inlet 11 by sliding, the structural design is ingenious, and the rotation drive is labor-saving.

[0053] More specifically, Figure 3 , Figure 8 and Fig. 9As shown, the first ash baffle 16 is provided with a first connecting shaft 161, the second ash baffle 17 is provided with a second connecting shaft 171, the mounting portion 19 is provided with a first linear slide rail 191 and a second linear slide rail 192, the rotating cover 18 is provided with a first arcuate slide rail 181 and a second arcuate slide rail 182, the first connecting shaft 161 passes through the first linear slide rail 191 to connect the first arcuate slide rail 181, the second connecting shaft 171 passes through the second linear slide rail 192 to connect the second arcuate slide rail 182, the first ash baffle 16 and the second ash baffle 17 are both linked with the rotating cover 18 to convert the rotational motion into the linear motion, by providing the first connecting shaft 161 on the first ash baffle 16, providing the first linear slide rail 191 slidably matched with the first connecting shaft 161 on the mounting portion 19, providing the first arcuate slide rail 181 slidably matched with the first connecting shaft 161 on the rotating cover 18, the first connecting shaft 161 passes through the first linear slide rail 191 and is inserted into the first arcuate slide rail 181, by setting a second connecting shaft 171 on the second ash baffle 17, setting a second linear slide rail 192 that slidably cooperates with the second connecting shaft 171 on the mounting portion 19, and setting a second arcuate slide rail 182 that slidably cooperates with the second connecting shaft 171 on the rotating cover 18, the second connecting shaft 171 passes through the second linear slide rail 192 and is inserted into the second arcuate slide rail 182, the user applies force to the rotating cover 18 to make the rotating cover 18 rotate, the first arcuate slide rail 181 acts on the first connecting shaft 161 so that the first connecting shaft 161 is forced to slide along the first linear slide rail 191, the second arcuate slide rail 182 acts on the second connecting shaft 171 so that the second connecting shaft 171 is forced to slide along the second linear slide rail 192, the first ash baffle 16 and the second ash baffle 17 are moved closer together by relative sliding to close the pen inlet 11, and the first ash baffle 16 and the second ash baffle 17 are moved away from each other by relative sliding to open the pen inlet 11, the structural design is ingenious and labor-saving to use.

[0054] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A pencil sharpener, comprising a housing (1), wherein the housing (1) is provided with a cavity and a pen inlet (11) connected to the cavity, wherein a cutting mechanism (2) is rotatably mounted in the cavity, wherein the cutting mechanism (2) is capable of rotating relative to the housing (1) under force, and wherein: A rotation-stopping mechanism (3) linked to the cutting mechanism (2) is also installed in the cavity. The rotation-stopping mechanism (3) enables the cutting mechanism (2) to rotate in one direction. A partition structure (12) is arranged between the rotation-stopping mechanism (3) and the cutting mechanism (2). The partition structure (12) divides the cavity into a first accommodating chamber (13) and a second accommodating chamber (14). The rotation-stopping mechanism (3) is located in the first accommodating chamber (13), and the cutting mechanism (2) is located in the second accommodating chamber (14). The partition structure (12) limits the pencil shavings generated by the cutting mechanism (2) to the second accommodating chamber (14).

2. A pencil sharpener according to claim 1, characterized in that: The cutting mechanism (2) comprises a knife seat (21) and a mounting frame (23) for mounting the knife seat (21); a blade (22) is mounted on the knife seat (21); a connecting seat (231) is provided on the mounting frame (23); the mounting frame (23) is rotatably mounted in the cavity via the connecting seat (231); the knife seat (21) is located on one side of the connecting seat (231); and the anti-rotation mechanism (3) is located on the other side of the connecting seat (231).

3. A pencil sharpener according to claim 2, characterized in that: The inner wall of the housing (1) is provided with a connecting ring (15) adapted to the mounting frame (23); the mounting frame (23) is rotatably mounted on the connecting ring (15); and the connecting ring (15) is engaged with the connecting seat (231) to form a partition structure (12).

4. A pencil sharpener according to claim 2, characterized in that: The anti-rotation mechanism (3) comprises a limiting structure (31) and an anti-rotation member (32); the limiting structure (31) is arranged on the connecting seat (231); the limiting structure (31) cooperates with the anti-rotation member (32) to enable the mounting frame (23) to rotate in one direction.

5. A pencil sharpener according to claim 4, characterized in that: The stopper (32) is slidably installed in the first accommodating cavity (13), and the stopper (32) is connected to a reset elastic member (33). When the knife seat (21) is driven by force to drive the mounting frame (23) to rotate along a first direction, the limiting structure (31) rotates to act on the end of the stopper (32), so that the stopper (32) is forced to compress the reset elastic member (33) to slide and retract, and the knife seat (21) is rotatable in the shell (1). When the knife seat (21) drives the mounting frame (23) to rotate in a second direction opposite to the first direction, the limiting structure (31) abuts against the side wall of the stopper (32), and the stopper (32) remains extended under the action of the reset elastic member (33), and the knife seat (21) is limited in rotation in the shell (1).

6. A pencil sharpener according to claim 5, characterized in that: The limiting structure (31) is a plurality of protrusions arranged on the connecting seat (231), and the plurality of protrusions are arranged continuously along the circumference of the connecting seat (231), and a gap (311) for inserting the stopper (32) is formed between adjacent protrusions, and the end of the stopper (32) is provided with a first guiding inclined surface (321) adapted to the protrusion, and the stopper (32) cooperates with the protrusion through the first guiding inclined surface (321) to slide and retract.

7. A pencil sharpener according to claim 4, characterized in that: The limiting structure (31) is a bevel gear ring arranged on the connecting seat (231), and the stop member (32) is an elastic rib arranged on the side wall of the shell (1). When the knife seat (21) is driven by force to drive the mounting frame (23) to rotate in a first direction, the rotation of the bevel gear ring acts on the end of the elastic rib, so that the elastic rib is elastically deformed under force, and the knife seat (21) can rotate in the shell (1). When the knife seat (21) drives the mounting frame (23) to rotate in a second direction opposite to the first direction, the end of the elastic rib abuts against the recess (312) of the bevel gear ring, and the knife seat (21) is limited in rotation in the shell (1).

8. A pencil sharpener according to claim 1, characterized in that: A first ash baffle (16) and a second ash baffle (17) adapted to the pen inlet (11) are movably installed in the housing (1); the first ash baffle (16) and the second ash baffle (17) cooperate to open and close the pen inlet (11); and the first ash baffle (16) and the second ash baffle (17) are both located between the pen inlet (11) and the anti-rotation mechanism (3).

9. A pencil sharpener according to claim 8, characterized in that: The housing (1) is provided with a rotating cover (18), the pen inlet (11) is provided on the rotating cover (18), the housing (1) is provided with a mounting portion (19), the first ash baffle (16) and the second ash baffle (17) are both slidably mounted in the mounting portion (19), the first ash baffle (16) and the second ash baffle (17) are both connected to the rotating cover (18), the rotating cover (18) drives the first ash baffle (16) and the second ash baffle (17) to slide relative to each other by rotating, and the first ash baffle (16) and the second ash baffle (17) open and close the pen inlet (11) by sliding relative to each other.

10. A pencil sharpener according to claim 9, characterized in that: The first dust baffle (16) is provided with a first connecting shaft (161), the second dust baffle (17) is provided with a second connecting shaft (171), the mounting portion (19) is provided with a first linear slide rail (191) and a second linear slide rail (192), the rotating cover (18) is provided with a first arcuate slide rail (181) and a second arcuate slide rail (182), the first connecting shaft (161) passes through the first linear slide rail (191) to connect to the first arcuate slide rail (181), and the second connecting shaft (171) passes through the second linear slide rail (192) to connect to the second arcuate slide rail (182).

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