Pencil sharpener

Abstract

The utility model discloses a pencil sharpener, and relates to the technical field of stationery, the pencil sharpener comprises a shell, a first clamping piece and a second clamping piece are slidably mounted on the shell, a first clamping opening allowing a pencil to penetrate is formed between the first clamping piece and the second clamping piece, the first clamping piece is provided with a first rack, and the second clamping piece is provided with a second rack; the first clamping piece is provided with a first rack, the second clamping piece is provided with a second rack, a transmission gear is installed between the first rack and the second rack, and the transmission gear, the first rack and the second rack are matched in a transmission mode so that the first clamping piece and the second clamping piece can synchronously move in the opposite direction or the opposite direction. The switch is in transmission connection with the first clamping piece, the switch is stressed to drive the first clamping piece to slide, and the first clamping piece drives the second clamping piece to reversely slide by the same distance through the transmission gear.

Description

Technical Field

[0001] The present application relates to the technical field of stationery supplies, and more specifically to a pencil sharpener. Background Art

[0002] A pencil sharpener is a tool that can safely and quickly cut pencils. Currently, a pencil sharpener generally includes a box body, a pencil clamping mechanism, and a pencil sharpening mechanism. When sharpening a pencil, it is necessary to first apply force to the switch to drive the pencil clamping mechanism to open, so that the pencil can pass through the pencil clamping mechanism and enter the pencil sharpening mechanism. After the pencil enters the correct position, it is clamped by the pencil clamping mechanism, and then the pencil sharpening mechanism cuts the tip of the pencil. Most traditional pencil sharpeners use a pull-switch type pencil clamping mechanism. The pull-switch type pencil clamping mechanism requires the user to apply force with two fingers to the switch to drive the pencil clamping mechanism to open. Since the force applied by the two fingers cannot be guaranteed to be the same, the position of the pencil after being locked is prone to eccentricity, and the pencil sharpening efficiency is poor. To solve the above problems, for example, the utility model patent with the publication number: CN209008253U discloses a gear centering and locking mechanism, including a first spring, a second spring, an upper base, a first track and a second track that are fixedly parallel to the upper base. The first track and the second track are slidably provided with a first slider and a second slider. The bottom of the first slider is provided with a first rack, and the bottom of the second slider is provided with a second rack. The upper base is rotatably provided with a large gear, and the first rack and the second rack are simultaneously engaged with the large gear; when in use, the pencil is inserted between the first slider and the second slider to separate the two. Since the two sliders are respectively engaged with the large gear through the racks, the separated distances on both sides are the same. After the pencil is sharpened and pulled out, under the elastic force of the first spring and the second spring and the guidance of the large gear, the first slider and the second slider return to their positions and abut against each other again. The first slider and the second slider adopt a gear-rack connection method, which is more reliable and stable in structure, and the centering is more accurate, and it is applicable to pencils with different diameters. However, between the first slider and the first track, a concave-convex structure is required to achieve sliding connection, and between the second slider and the second track, a concave-convex structure is required to achieve sliding connection. Not only is the structure complex and the production difficulty is high, but also the first slider and the second slider are driven to slide by the acting force when the pencil is inserted. The resistance when the pencil is inserted is large, which is not only laborious to use but also the surface of the pen barrel is easily scratched. Therefore, there is still a need for a pencil sharpener that is labor-saving when clamping the pencil. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a pencil sharpener, through a gear-rack structure, the first clamping member and the second clamping member perform synchronous forward or backward movement, and the clamping and locking are more accurate and reliable. And by setting a switch linked to the first clamping member, by applying force to the switch, the first clamping member and the second clamping member can perform synchronous backward movement to expand the size of the first clamping opening, which is more labor-saving to use and the structure is simpler and more reliable.

[0004] The present application provides a pencil sharpener, which includes a housing. A first clamping member and a second clamping member are slidably mounted on the housing. A first clamping opening for a pen to pass through is formed between the first clamping member and the second clamping member. The first clamping member is provided with a first rack, and the second clamping member is provided with a second rack. A transmission gear is installed between the first rack and the second rack. The transmission gear, the first rack and the second rack are in transmission cooperation so that the first clamping member and the second clamping member move synchronously towards or away from each other. A switch is movably mounted on the housing. The switch is in transmission connection with the first clamping member. When the switch is subjected to force, it drives the first clamping member to slide. The first clamping member drives the second clamping member to slide in the opposite direction by the same distance through the transmission gear.

[0005] In this technical solution, a first clamping opening is formed by the first clamping member and the second clamping member. The pencil passes through the first clamping opening and is inserted into the housing. The pencil is clamped by the first clamping member and the second clamping member. The size of the first clamping opening can be adjusted by the sliding of the first clamping member and the second clamping member. The size of the first clamping opening is reduced by the first clamping member and the second clamping member sliding towards each other, and the size of the first clamping opening is enlarged by the first clamping member and the second clamping member sliding away from each other to accommodate pencils of different diameters. A first rack is provided on the first clamping member, a second rack is provided on the second clamping member, and a transmission gear is installed between the first rack and the second rack. One side of the transmission gear meshes with the first rack, and the other side of the transmission gear meshes with the second rack. Through the transmission cooperation of the transmission gear, the first rack and the second rack, the first clamping member and the second clamping member move synchronously towards or away from each other, so that the sliding distances of the first clamping member and the second clamping member are the same, the transmission efficiency is relatively high, and the clamping of the pencil is more accurate and reliable. In addition, a switch movably mounted on the housing and in transmission connection with the first clamping member is provided. When the user applies force to the switch to drive the first clamping member to slide downward, under the action of the transmission cooperation of the transmission gear, the first rack and the second rack, the second clamping member slides upward and slides the same distance as the first clamping member, so that the size of the first clamping opening is enlarged for the pencil to be directly inserted. The pencil can be inserted without resistance and the surface of the pen rod will not be scratched. On the other hand, the first clamping member and the second clamping member are in contact with each other and can slide relative to each other without the need to additionally provide concave-convex structures to achieve sliding, so the structure is simpler and the assembly is more labor-saving.

[0006] As an improvement, the first clamping member is connected with a first reset elastic member. The first clamping member and the second clamping member are kept in a clamped state by the first reset elastic member and both are slid back to their original positions by the first reset elastic member. In this technical solution, the first clamping member is connected with the first reset elastic member. When the user applies a force to the switch to drive the first clamping member to slide downward, the first reset elastic member is in a compressed state. When the user removes the force on the switch, the first clamping member slides upward and resets under the action of the first reset elastic member. Under the transmission and cooperation of the transmission gear, the first rack and the second rack, the second clamping member slides downward and slides the same distance as the first clamping member, so that the size of the first clamping opening is reduced to clamp the pencil. The first clamping member and the second clamping member are kept in a clamped state by the first reset elastic member, improving the efficiency of clamping the pencil.

[0007] As an improvement, a first roller assembly and a second roller assembly are movably installed in the housing. A second clamping opening is formed between the first roller assembly and the second roller assembly. The first roller assembly and the second roller assembly are adjusted by moving under force to adjust the size of the second clamping opening. In this technical solution, the pencil passes through the first clamping opening and enters the housing, and is clamped by the first roller assembly and the second roller assembly. The first roller assembly and the second roller assembly drive the pencil to move forward / backward in a clamped form through rotational cooperation. When the pencil moves forward, it is feeding the pencil, and when the pencil moves backward, it is retracting the pencil. Then, the tip of the pencil is cut by the pencil sharpening mechanism. The first roller assembly and the second roller assembly can adjust the size of the second clamping opening movably according to the size of the inserted pencil, adapting to pencils of various shapes and various diameters.

[0008] As an improvement, the first clamping member is provided with a first linkage portion connected to the first roller assembly. The first clamping member slides to drive the first roller assembly to swing through the first linkage portion. The second clamping member is provided with a second linkage portion connected to the second roller assembly. The second clamping member slides to drive the second roller assembly to swing through the second linkage portion. In this technical solution, the first roller assembly and the second roller assembly are both swingably mounted in the housing. The first roller assembly and the second roller assembly are stressed to adjust the size of the second clamping opening by swinging. A first linkage portion is provided on the first clamping member. The first linkage portion slides synchronously with the first clamping member. The first linkage portion drives the first roller assembly to swing away from or close to the second roller assembly by sliding. A second linkage portion is provided on the second clamping member. The second linkage portion slides synchronously with the second clamping member. The second linkage portion drives the second roller assembly to swing away from or close to the first roller assembly by sliding. The first roller assembly and the second roller assembly swing closer to each other to reduce the size of the second clamping opening, and swing away from each other to increase the size of the second clamping opening. The first clamping member is linked with the first roller assembly through the first linkage portion, and the second clamping member is linked with the second roller assembly through the second linkage portion. There is no need to additionally control the swinging of the first roller assembly and the second roller assembly. The overall linkage is better and it is more labor-saving to use.

[0009] As an improvement, the first linkage portion is provided with a first reset structure. The first roller assembly swings and resets through the first reset structure. The second linkage portion is provided with a second reset structure. The second roller assembly swings and resets through the second reset structure. In this technical solution, the first roller assembly swings away from or close to the second roller assembly through the first linkage portion. By providing a first reset structure on the first linkage portion, the first reset structure can limit the swinging amplitude of the first roller assembly, so that the first roller assembly can maintain the clamping force on the pen, and the first roller assembly can swing and reset through the first reset structure, improving the clamping efficiency. The second roller assembly swings away from or close to the first roller assembly through the second linkage portion. By providing a second reset structure on the second linkage portion, the second reset structure can limit the swinging amplitude of the second roller assembly, so that the second roller assembly can maintain the clamping force on the pen, and the second roller assembly can swing and reset through the second reset structure, improving the clamping efficiency.

[0010] As an improvement, this solution can provide a specific structure of a first linkage part and a second linkage part. Among them, the first linkage part includes a first connecting rod and a second connecting rod. The second connecting rod is configured as a first reset structure. The first roller assembly is located between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod cooperate to drive the first roller assembly to swing up and down. The second linkage part includes a third connecting rod and a fourth connecting rod. The third connecting rod is configured as a second reset structure. The second roller assembly is located between the third connecting rod and the fourth connecting rod. The third connecting rod and the fourth connecting rod cooperate to drive the second roller assembly to swing up and down. In this technical solution, the first roller assembly is arranged between the first connecting rod and the second connecting rod, so that the first clamping member can drive the first linkage part to swing up and down through the first connecting rod or the second connecting rod during the up and down sliding process, with higher transmission efficiency and more reliable swinging. The second roller assembly is arranged between the third connecting rod and the fourth connecting rod, so that the second clamping member can drive the second roller assembly to swing up and down through the third connecting rod and the fourth connecting rod during the up and down sliding process, with higher transmission efficiency and more reliable swinging. The connecting rod driving structure is simple and labor-saving. On the other hand, the first connecting rod is closer to the second clamping port than the second connecting rod, and the fourth connecting rod is closer to the second clamping port than the third connecting rod. When the pen is inserted into the first clamping port, the first clamping member and the second clamping member first drive the first roller assembly and the second roller assembly to swing. The first linkage part drives the first roller assembly to swing away from the second roller assembly through the first connecting rod, and the second linkage part drives the second roller assembly to swing away from the first roller assembly through the fourth connecting rod, so that the pen can pass through the second clamping port. Considering that a too large size of the second clamping port has a poor clamping effect on the pen, in this solution, the swinging amplitude of the first roller assembly is limited by the second connecting rod, and the swinging amplitude of the second roller assembly is limited by the third connecting rod. When the pen is inserted into the second clamping port, the pen has an outward acting force on the first roller assembly and the second roller assembly. The first roller assembly is swing-limited by the second connecting rod, and the second roller assembly is swing-limited by the third connecting rod, so that the clamping effect of the first roller assembly and the second roller assembly on the pen is still good, improving the clamping efficiency.

[0011] As an improvement, this solution can provide a specific structure of the first linkage part and the second linkage part. Among them, the first linkage part is provided with a link structure for driving the first roller assembly to swing, the first linkage part is connected with a second reset elastic member, and the second reset elastic member is configured as a first reset structure; the second linkage part is provided with a link structure for driving the second roller assembly to swing, the second linkage part is connected with a third reset elastic member, and the third reset elastic member is configured as a second reset structure. In this technical solution, the first linkage part drives the first roller assembly to swing away from the second roller assembly through the link structure. This link structure can be a single link or a double link. By setting that the second linkage part is connected with a second reset elastic member, the swing amplitude of the first roller assembly is restricted by the second reset elastic member, so that the first roller assembly can maintain the clamping force on the pen, and the first roller assembly can swing and reset through the second reset elastic member, improving the clamping efficiency; the second linkage part drives the second roller assembly to swing away from the first roller assembly through the link structure. This link structure can be a single link or a double link. By setting that the first linkage part is connected with a third reset elastic member, the swing amplitude of the second roller assembly is restricted by the third reset elastic member, so that the second roller assembly can maintain the clamping force on the pen, and the second roller assembly can swing and reset through the third reset elastic member, improving the clamping efficiency.

[0012] As an improvement, a mounting seat is arranged in the housing, the first clamping member and the second clamping member are both mounted between the mounting seat and the housing, and the first roller assembly and the second roller assembly are both mounted in the mounting seat. In this technical solution, by arranging a mounting seat in the housing to movably mount the first roller assembly and the second roller assembly, the mounting structures of the first roller assembly and the second roller assembly are simple and reliable. And by mounting the first clamping member and the second clamping member between the mounting seat and the housing, the mounting structures of the first clamping member and the second clamping member are simple and reliable, and the first clamping member and the second clamping member can slide up and down between the mounting seat and the housing without additionally arranging a concave-convex sliding structure, with a clever structural design and a high sliding efficiency.

[0013] As an improvement, the mounting base is provided with a first through hole and a second through hole. The first linkage portion passes through the first through hole to connect the first roller assembly, and the first linkage portion is slidably matched with the first through hole. The second linkage portion passes through the second through hole to connect the second roller assembly, and the second linkage portion is slidably matched with the second through hole. In this technical solution, both the first roller assembly and the second roller assembly are installed in the mounting base. By providing the first through hole for the first linkage portion to pass through on the mounting base, the first linkage portion can pass through the first through hole to connect the first roller assembly, and the first linkage portion can slide up and down in the first through hole. The first through hole has the functions of sliding guidance and limitation for the first linkage portion, improving the sliding efficiency. Similarly, by providing the second through hole for the second linkage portion to pass through on the mounting base, the second linkage portion can pass through the second through hole to connect the second roller assembly, and the second linkage portion can slide up and down in the second through hole. The second through hole has the functions of sliding guidance and limitation for the second linkage portion, improving the sliding efficiency.

[0014] As an improvement, the mounting base is provided with a mounting groove for accommodating the first clamping member and the second clamping member, and the first clamping member and the second clamping member are slidably installed in the mounting groove. In this technical solution, by providing the mounting groove on the side of the mounting base close to the housing, the first clamping member and the second clamping member are slidably installed through the mounting groove, improving the sliding efficiency and mounting reliability.

[0015] As an improvement, the first roller assembly is provided with a first rotating end, and the second roller assembly is provided with a second rotating end distributed in the opposite direction to the first rotating end. Both the first rotating end and the second rotating end are rotatably installed on the housing; the first roller assembly is provided with a first swinging end, and the second roller assembly is provided with a second swinging end distributed in the opposite direction to the first swinging end. The first roller assembly and the second roller assembly are stressed to adjust the size of the second clamping opening by swinging. In this technical solution, the first rotating end is provided on the first roller assembly, and the second rotating end is provided on the second roller assembly. Both the first rotating end and the second rotating end can rotate on the housing. The first roller assembly and the second roller assembly can rotate so that the pencil can enter and exit unobstructed, and the efficiency of advancing and retracting the pencil is higher; the first swinging end is provided on the first roller assembly, and the second swinging end is provided on the second roller assembly. Both the first swinging end and the second swinging end can swing on the housing. The first swinging end and the second swinging end are stressed to swing, so that the first roller assembly and the second roller assembly move relatively away from or close to each other, thereby changing the size of the clamping opening. Both the first roller assembly and the second roller assembly are provided with one end that can swing to change the size of the clamping opening. The acting force required for the first roller assembly and the second roller assembly to swing is small, and it is more labor-saving in actual use. The first swinging end and the second swinging end are arranged in the opposite direction. The first swinging end and the second swinging end only need to swing in the opposite direction by half of the position to complete the expansion of the size of the clamping opening, which is more labor-saving and has higher transmission efficiency.

[0016] As an improvement, a rotating shaft is provided at one end of the switch, or a rotating shaft is provided on the housing. The switch is rotatably connected to the housing through the rotating shaft. The other end of the switch abuts against the first clamping member, and the switch drives the first clamping member to slide by rotating when a force is applied. In this technical solution, the switch and the housing are rotatably connected through the rotating shaft. The user presses the switch to make it rotate, and the switch drives the first clamping member to slide by rotating. The switch is a push-type switch, and the user only needs to apply force with a single finger to drive the first clamping member and the second clamping member to slide relative to each other. The structure is simple and labor-saving. Brief Description of the Drawings

[0017] Figure 1 FIG. is a schematic perspective view of a pencil sharpener according to the present application.

[0018] Figure 2 FIG. is a schematic perspective view of the pencil sharpener of the present application with the housing removed.

[0019] Figure 3 FIG. is a schematic diagram of the linkage of the first clamping member, the second clamping member and the switch in the present application.

[0020] Figure 4 For the present application Figure 2 An exploded view of the structure shown.

[0021] Figure 5 FIG. is a schematic diagram of the linkage of the first clamping member, the second clamping member, the first roller assembly and the second roller assembly in the present application.

[0022] Figure 6 FIG. is a schematic perspective view of the first roller assembly, the second roller assembly and a part of the mounting seat in the present application.

[0023] Figure 7 FIG. is a partial structural schematic diagram of Embodiment III of the present application.

[0024] As shown in the figure: 1. Housing; 11. Mounting seat; 111. First through hole; 112. Second through hole; 113. Mounting groove; 114. First semi-circular groove; 115. Second semi-circular groove; 116. First strip-shaped groove; 117. Second strip-shaped groove; 2. First clamping member; 21. First rack; 22. First reset elastic member; 23. First linkage portion; 231. First connecting rod; 232. Second connecting rod; 233. Second reset elastic member; 3. Second clamping member; 31. Second rack; 32. Second linkage portion; 321. Third connecting rod; 322. Fourth connecting rod; 323. Third reset elastic member; 4. First clamping opening; 5. Transmission gear; 6. Switch; 61. Rotating shaft; 62. Pressing protrusion; 7. First roller assembly; 71. First rotating end; 72. First swinging end; 8. Second roller assembly; 81. Second rotating end; 82. Second swinging end; 9. Second clamping opening. Detailed Implementation Modes

[0025] To better understand the present application, more detailed descriptions 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 implementation modes of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0026] In the accompanying drawings, for the sake of convenience of illustration, the thickness, dimensions, and shape of the objects have been slightly exaggerated. The drawings are only examples and are not drawn strictly to scale.

[0027] It should also be understood that the terms "comprise", "include", "have", "contain", "include with", when used in this specification, indicate the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof. The terms "first", "second", etc. are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and do not indicate or imply the relative importance and quantity of the indicated devices, elements, or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0028] In addition, it should be noted that the terms "install", "set", "be provided with", "connect", "be connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements, or components; it can be directly set on another component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] Embodiment 1

[0030] As Figures 1 to 7As shown, the present application discloses a pencil sharpener, comprising a shell 1, on which a first clamping member 2 and a second clamping member 3 are slidably mounted, a first clamping opening 4 for a pencil to pass through is formed between the first clamping member 2 and the second clamping member 3, the first clamping member 2 is provided with a first rack 21, the second clamping member 3 is provided with a second rack 31, a transmission gear 5 is installed between the first rack 21 and the second rack 31, the transmission gear 5, the first rack 21 and the second rack 31 are transmission-coordinated so that the first clamping member 2 and the second clamping member 3 move synchronously toward or away from each other, a first clamping opening 4 is formed by the first clamping member 2 and the second clamping member 3, a pencil passes through the first clamping opening 4 and is inserted into the shell 1, the pencil is clamped by the first clamping member 2 and the second clamping member 3, and the first clamping member 2 and the second clamping member 3 can adjust the first The size of the clamping opening 4 is such that the first clamping member 2 and the second clamping member 3 can reduce the size of the first clamping opening 4 by sliding toward each other, and the first clamping member 2 and the second clamping member 3 can expand the size of the first clamping opening 4 by sliding away from each other, so as to be suitable for pencils with different diameters. A first rack 21 is provided on the first clamping member 2, and a second rack 31 is provided on the second clamping member 3. A transmission gear 5 is installed between the first rack 21 and the second rack 31. One side of the transmission gear 5 is meshed with the first rack 21, and the other side of the transmission gear 5 is meshed with the second rack 31. Through the transmission cooperation of the transmission gear 5, the first rack 21 and the second rack 31, the first clamping member 2 and the second clamping member 3 move toward or away from each other synchronously, so that the sliding distances of the first clamping member 2 and the second clamping member 3 are the same, the transmission efficiency is high, and the pencils can be clamped more accurately and reliably.

[0031] like Figure 2 and Figure 3 As shown, a switch 6 is movably mounted on the housing 1, and the switch 6 is transmission-connected with the first clamping member 2. The switch 6 is subjected to force to drive the first clamping member 2 to slide, and the first clamping member 2 drives the second clamping member 3 to slide in the opposite direction by the same distance through the transmission gear 5. A switch 6 transmission-connected with the first clamping member 2 is movably mounted on the housing 1. When the user applies force to the switch 6 to drive the first clamping member 2 to slide downward, under the transmission cooperation of the transmission gear 5, the first rack 21 and the second rack 31, the second clamping member 3 slides upward and slides the same distance with the first clamping member 2, so that the size of the first clamping opening 4 is enlarged to facilitate direct insertion of the pencil. The insertion of the pencil will not encounter resistance, and the surface of the pen shaft will not be scratched. On the other hand, the first clamping member 2 and the second clamping member 3 abut against each other to enable relative sliding, and there is no need to additionally set a concave-convex structure to achieve sliding. The structure is simpler and the assembly is more labor-saving.

[0032] More specifically, Figure 2 and Figure 3As shown, the first clamping member 2 is connected with a first reset elastic member 22. The first clamping member 2 and the second clamping member 3 are kept in a clamped state by the first reset elastic member 22 and both slide and reset through the first reset elastic member 22. The first clamping member 2 is arranged to be connected with the first reset elastic member 22. When the user applies a force to the switch 6 to drive the first clamping member 2 to slide downward, the first reset elastic member 22 is in a compressed and stressed state. When the user removes the force on the switch 6, the first clamping member 2 slides upward and resets under the action of the first reset elastic member 22. Under the transmission and cooperation of the transmission gear 5, the first rack 21 and the second rack 31, the second clamping member 3 slides downward and slides the same distance as the first clamping member 2, so that the size of the first clamping opening 4 is reduced to clamp the pencil. The first clamping member 2 and the second clamping member 3 are kept in a clamped state by the first reset elastic member 22, improving the pencil clamping efficiency. In this application, the first reset elastic member 22 is selected as a spring, and the spring has a simple structure and low cost.

[0033] More specifically, as Figures 4 to 6 shown, a first roller assembly 7 and a second roller assembly 8 are movably installed in the housing 1. A second clamping opening 9 is formed between the first roller assembly 7 and the second roller assembly 8. The first roller assembly 7 and the second roller assembly are stressed and adjusted by moving to adjust the size of the second clamping opening 9. The pencil passes through the first clamping opening 4 and enters the housing 1, and is clamped by the first roller assembly 7 and the second roller assembly 8. The first roller assembly 7 and the second roller assembly drive the pencil to move forward / backward in a clamped form through rotational cooperation. The forward movement of the pencil is the pen insertion, and the backward movement of the pencil is the pen withdrawal. Then, the pencil tip is cut by the pencil sharpening mechanism. The first roller assembly 7 and the second roller assembly can movably adjust the size of the clamping opening according to the size of the inserted pencil, and are suitable for using pencils of various shapes and various pen diameters.

[0034] More specifically, as Figures 4 to 6As shown, the first clamping member 2 is provided with a first linkage portion 23 connected to the first roller assembly 7. The first clamping member 2 slides to drive the first roller assembly 7 to swing through the first linkage portion 23. The second clamping member 3 is provided with a second linkage portion 32 connected to the second roller assembly 8. The second clamping member 3 slides to drive the second roller assembly 8 to swing through the second linkage portion 32. It is provided that both the first roller assembly 7 and the second roller assembly 8 are swingably mounted in the housing 1. The first roller assembly 7 and the second roller assembly 8 are stressed to adjust the size of the second clamping opening 9 by swinging. A first linkage portion 23 is provided on the first clamping member 2. The first linkage portion 23 slides synchronously with the first clamping member 2. The first linkage portion 23 drives the first roller assembly 7 to swing away from or close to the second roller assembly 8 by sliding. A second linkage portion 32 is provided on the second clamping member 3. The second linkage portion 32 slides synchronously with the second clamping member 3. The second linkage portion 32 drives the second roller assembly 8 to swing away from or close to the first roller assembly 7 by sliding. The first roller assembly 7 and the second roller assembly 8 swing closer to each other to reduce the size of the second clamping opening 9, and swing away from each other to enlarge the size of the second clamping opening 9. The first clamping member 2 is linked with the first roller assembly 7 through the first linkage portion 23, and the second clamping member 3 is linked with the second roller assembly 8 through the second linkage portion 32. There is no need to additionally control the swinging of the first roller assembly 7 and the second roller assembly 8, the overall linkage is better, and it is more labor-saving to use.

[0035] More specifically, the first linkage portion 23 is provided with a first reset structure. The first roller assembly 7 swings and resets through the first reset structure. The first roller assembly 7 swings away from or close to the second roller assembly 8 through the first linkage portion 23. By providing the first reset structure on the first linkage portion 23, the first reset structure can limit the swinging amplitude of the first roller assembly 7, so that the first roller assembly 7 can maintain the clamping force on the pen, and the first roller assembly 7 can swing and reset through the first reset structure, improving the clamping efficiency; the second linkage portion 32 is provided with a second reset structure. The second roller assembly 8 swings and resets through the second reset structure. The second roller assembly 8 swings away from or close to the first roller assembly 7 through the second linkage portion 32. By providing the second reset structure on the second linkage portion 32, the second reset structure can limit the swinging amplitude of the second roller assembly 8, so that the second roller assembly 8 can maintain the clamping force on the pen, and the second roller assembly 8 can swing and reset through the second reset structure, improving the clamping efficiency.

[0036] More specifically, as Figure 1 、 Figure 2 and Figure 4As shown, a mounting base 11 is provided inside the housing 1. Both the first clamping member 2 and the second clamping member 3 are mounted between the mounting base 11 and the housing 1. Both the first roller assembly 7 and the second roller assembly 8 are mounted inside the mounting base 11. By providing the mounting base 11 inside the housing 1 to movably mount the first roller assembly 7 and the second roller assembly 8, the mounting structures of the first roller assembly 7 and the second roller assembly 8 are simple and reliable. And by mounting the first clamping member 2 and the second clamping member 3 between the mounting base 11 and the housing 1, the mounting structures of the first clamping member 2 and the second clamping member 3 are simple and reliable. Moreover, the first clamping member 2 and the second clamping member 3 can slide up and down between the mounting base 11 and the housing 1 without the need to additionally provide a concave-convex sliding structure, with a clever structural design and high sliding efficiency. The first reset elastic member 22 is mounted between the first clamping member 2 and the mounting base 11.

[0037] More specifically, as Figure 4 and Figure 5 shown, the mounting base 11 is provided with a first through hole 111 and a second through hole 112. The first linkage portion 23 passes through the first through hole 111 to connect the first roller assembly 7. The first linkage portion 23 is in sliding fit with the first through hole 111. The second linkage portion 32 passes through the second through hole 112 to connect the second roller assembly 8. The second linkage portion 32 is in sliding fit with the second through hole 112. Both the first roller assembly 7 and the second roller assembly 8 are mounted inside the mounting base 11. By providing the first through hole 111 on the mounting base 11 for the first linkage portion 23 to pass through, the first linkage portion 23 can connect the first roller assembly 7 by passing through the first through hole 111, and the first linkage portion 23 can slide up and down in the first through hole 111. The first through hole 111 has a sliding guiding and limiting effect on the first linkage portion 23, improving the sliding efficiency. Similarly, by providing the second through hole 112 on the mounting base 11 for the second linkage portion 32 to pass through, the second linkage portion 32 can connect the second roller assembly 8 by passing through the second through hole 112, and the second linkage portion 32 can slide up and down in the second through hole 112. The second through hole 112 has a sliding guiding and limiting effect on the second linkage portion 32, improving the sliding efficiency.

[0038] More specifically, as Figure 2 and Figure 4 shown, the mounting base 11 is provided with a mounting groove 113 for accommodating the first clamping member 2 and the second clamping member 3. The first clamping member 2 and the second clamping member 3 are slidably mounted inside the mounting groove 113. By providing the mounting groove 113 on the side of the mounting base 11 close to the housing 1, the first clamping member 2 and the second clamping member 3 are slidably mounted through the mounting groove 113, improving the sliding efficiency and mounting reliability. The first reset elastic member 22 is mounted between the first clamping member 2 and the mounting groove 113.

[0039] More specifically, as Figure 5 and Figure 6As shown in the figure, the first roller assembly 7 is provided with a first rotating end 71, and the second roller assembly 8 is provided with a second rotating end 81 which is distributed in the opposite direction to the first rotating end 71. Both the first rotating end 71 and the second rotating end 81 are rotatably installed on the housing 1. By providing the first rotating end 71 on the first roller assembly 7 and the second rotating end 81 on the second roller assembly 8, and both the first rotating end 71 and the second rotating end 81 are rotatable on the housing 1, the first roller assembly 7 and the second roller assembly 8 enable the pencil to enter and exit without obstruction, and the efficiency of advancing and retracting the pencil is higher. The mounting seat 11 is provided with a first semi-circular groove 114 and a second semi-circular groove 115 which are distributed in the opposite direction. The first rotating end 71 is installed in the first semi-circular groove 114, and the second rotating end 81 is installed in the second semi-circular groove 115, so that the first rotating end 71 and the second rotating end 81 can only rotate in the mounting seat 11. The structures of the first semi-circular groove 114 and the second semi-circular groove 115 are simple, which makes the installation of the first rotating end 71 and the second rotating end 81 convenient and labor-saving, and the rotation efficiency of the first roller assembly 7 and the second roller assembly 8 is relatively high.

[0040] More specifically, as Figure 5 and Figure 6As shown, the first roller assembly 7 is provided with a first swing end 72, and the second roller assembly 8 is provided with a second swing end 82 which is distributed in the opposite direction to the first swing end 72. The first roller assembly 7 and the second roller assembly are stressed to adjust the size of the second clamping opening 9 by swinging. The first swing end 72 is provided on the first roller assembly 7, and the second swing end 82 is provided on the second roller assembly 8. Both the first swing end 72 and the second swing end 82 are swingable on the housing 1. The first swing end 72 and the second swing end 82 are stressed to swing, so that the first roller assembly 7 and the second roller assembly 8 move relatively away from or close to each other, thereby changing the size of the clamping opening. Both the first roller assembly 7 and the second roller assembly 8 are provided with one end swingable to change the size of the clamping opening. The acting force required for the first roller assembly 7 and the second roller assembly 8 to swing is small, and it is more labor-saving in actual use. The first swing end 72 and the second swing end 82 are distributed in the opposite direction. The first swing end 72 and the second swing end 82 only need to swing relatively in the opposite direction by half of the position to complete the expansion of the size of the clamping opening, which is more labor-saving and has higher transmission efficiency. One side of the mounting seat 11 is provided with a first strip-shaped groove 116, and the first swing end 72 is slidably mounted in the first strip-shaped groove 116, so that the first swing end 72 can rotate and swing through the first strip-shaped groove 116. The other side of the mounting seat 11 is provided with a second strip-shaped groove 117, and the second swing end 82 is slidably mounted in the second strip-shaped groove 117, so that the second swing end 82 can rotate and swing through the second strip-shaped groove 117. The size of the mounting seat 11 is limited, the first swing end 72 and the second swing end 82 are distributed in the opposite direction, and the first strip-shaped groove 116 and the second strip-shaped groove 117 are distributed in the opposite direction, so that the first roller and the second roller have a large swingable range on the housing 1, the adjustable size range of the clamping opening is large, and the practicability is better. Moreover, the structures of the first strip-shaped groove 116 and the second strip-shaped groove 117 are simple, and the installation of the first roller assembly 7 and the second roller assembly 8 is convenient and labor-saving.

[0041] More specifically, as Figure 1 and Figure 2 shown, one end of the switch 6 is provided with a rotating shaft 61. Alternatively, the housing 1 is provided with a rotating shaft 61, and the switch 6 is rotatably connected to the housing 1 through the rotating shaft 61. The other end of the switch 6 abuts against the first clamping member 2. The switch 6 is stressed to rotate to drive the first clamping member 2 to slide. The switch 6 is rotatably connected to the housing 1 through the rotating shaft 61. The user presses the switch 6 to make the switch 6 rotate, and the switch 6 rotates to drive the first clamping member 2 to slide. The switch 6 is a push-button switch 6. The user only needs to apply force with a single finger to drive the first clamping member 2 and the second clamping member 3 to slide relatively. The structure is simple and labor-saving. The switch 6 is provided with a pressing protrusion 62, and the housing 1 is provided with a through-hole structure adapted to the pressing protrusion 62. The pressing protrusion 62 passes through the through-hole structure and exposes outside the housing 1 for the user to apply force.

[0042] Embodiment 2

[0043] As Figure 4 and Figure 5 shown, based on the first embodiment, this embodiment provides a pencil sharpener, whose structure is the same as that of the first embodiment. Among them, the first linkage part 23 includes a first connecting rod 231 and a second connecting rod 232. The second connecting rod 232 is configured as a first reset structure. The first roller assembly 7 is located between the first connecting rod 231 and the second connecting rod 232. The first connecting rod 231 and the second connecting rod 232 cooperate to drive the first roller assembly 7 to swing up and down. The first roller assembly 7 is arranged between the first connecting rod 231 and the second connecting rod 232, so that the first clamping member 2 can drive the first linkage part 23 to swing up and down through the first connecting rod 231 or the second connecting rod 232 during the up and down sliding process, with higher transmission efficiency and more reliable swinging; the second linkage part 32 includes a third connecting rod 321 and a fourth connecting rod 322. The third connecting rod 321 is configured as a second reset structure. The second roller assembly 8 is located between the third connecting rod 321 and the fourth connecting rod 322. The third connecting rod 321 and the fourth connecting rod 322 cooperate to drive the second roller assembly 8 to swing up and down. The second roller assembly 8 is arranged between the third connecting rod 321 and the fourth connecting rod 322, so that the second clamping member 3 can drive the second roller assembly 8 to swing up and down through the third connecting rod 321 and the fourth connecting rod 322 during the up and down sliding process, with higher transmission efficiency and more reliable swinging. The connecting rod driving structure is simple and labor-saving; on the other hand, when the pen is inserted into the first clamping port 4, the first clamping member 2 and the second clamping member 3 are first used to drive the first roller assembly 7 and the second roller assembly 8 to swing. The first linkage part drives the first roller assembly 7 to swing away from the second roller assembly 8 through the first connecting rod 231, and the second linkage part 32 drives the second roller assembly 8 to swing away from the first roller assembly 7 through the fourth connecting rod 322, so that the pen can pass through the second clamping port 9. Considering that the too large size of the second clamping port 9 has a poor clamping effect on the pen, in this solution, the swinging amplitude of the first roller assembly 7 is limited by the second connecting rod 232, and the swinging amplitude of the second roller assembly 8 is limited by the third connecting rod 321. When the pen is inserted into the second clamping port 9, the pen has an outward acting force on the first roller assembly 7 and the second roller assembly 8. The first roller assembly 7 is swing-limited by the second connecting rod 232, and the second roller assembly 8 is swing-limited by the third connecting rod 321, so that the clamping effect of the first roller assembly 7 and the second roller assembly 8 on the pen is still good, and the clamping efficiency is improved.

[0044] Embodiment Three

[0045] As Figure 7As shown, based on the first embodiment, this embodiment provides a pencil sharpener with the same structure as that of the first embodiment. Among them, the first linkage part 23 is provided with a connecting rod structure for driving the first roller assembly 7 to swing. The first linkage part 23 is connected with a second reset elastic member 233, and the second reset elastic member 233 is configured as a first reset structure. The first linkage part 23 drives the first roller assembly 7 to swing away from the second roller assembly 8 through the connecting rod structure. This connecting rod structure can be a single connecting rod or a double connecting rod. The double connecting rod is the first connecting rod 231 and the second connecting rod 232 described in the second embodiment, and the single connecting rod refers to only the first connecting rod 231 being provided. By setting the first linkage part 23 to be connected with the second reset elastic member 233, the swinging amplitude of the first roller assembly 7 is restricted by the second reset elastic member 233, so that the first roller assembly 7 can maintain the clamping force on the pen, and the first roller assembly 7 can swing and reset through the second reset elastic member 233, improving the clamping efficiency. The second reset elastic member 233 is specifically selected as a spring, and a convex column for installing the second reset elastic member 233 is provided on the first linkage part 23. The second reset elastic member 233 is installed between the first linkage part 23 and the mounting seat 11;

[0046] The second linkage part 32 is provided with a connecting rod structure for driving the second roller assembly 8 to swing. The second linkage part 32 is connected with a third reset elastic member 323, and the third reset elastic member 323 is configured as a second reset structure. The second linkage part 32 drives the second roller assembly 8 to swing away from the first roller assembly 7 through the connecting rod structure. This connecting rod structure can be a single connecting rod or a double connecting rod. The double connecting rod is the third connecting rod 321 and the fourth connecting rod 322 described in the second embodiment, and the single connecting rod refers to only the fourth connecting rod 322 being provided. By setting the second linkage part 32 to be connected with the third reset elastic member 323, the swinging amplitude of the second roller assembly 8 is restricted by the third reset elastic member 323, so that the second roller assembly 8 can maintain the clamping force on the pen, and the second roller assembly 8 can swing and reset through the third reset elastic member 323, improving the clamping efficiency. The third reset elastic member 323 is specifically selected as a spring, and a convex column for installing the third reset elastic member 323 is provided on the second linkage part 32. The third reset elastic member 323 is installed between the second linkage part 32 and the mounting seat 11.

[0047] This application is not limited to the above best embodiment. Anyone can obtain other various forms of products under the inspiration of this application. However, no matter what changes are made in its shape or structure, as long as there are technical solutions that are the same as or similar to those of this application, they all fall within the protection scope of this application.

Claims

1. A pencil sharpener, comprising a housing (1), a first clamping member (2) and a second clamping member (3) being slidably mounted on the housing (1), a first clamping opening (4) for a pen to pass through being formed between the first clamping member (2) and the second clamping member (3), characterized in that: The first clamping member (2) is provided with a first rack (21), and the second clamping member (3) is provided with a second rack (31). A transmission gear (5) is installed between the first rack (21) and the second rack (31). The transmission gear (5), the first rack (21) and the second rack (31) cooperate in transmission so that the first clamping member (2) and the second clamping member (3) move synchronously towards or away from each other. A switch (6) is movably installed on the housing (1). The switch (6) is in transmission connection with the first clamping member (2). The switch (6) is subjected to force to drive the first clamping member (2) to slide, and the first clamping member (2) drives the second clamping member (3) to slide in the opposite direction by the same distance through the transmission gear (5).

2. A pencil sharpener according to claim 1, characterized in that: The first clamping member (2) is connected to a first resetting elastic member (22); the first clamping member (2) and the second clamping member (3) are maintained in a clamped state by the first resetting elastic member (22) and are both slidably reset by the first resetting elastic member (22).

3. A pencil sharpener according to claim 1, characterized in that: A first roller assembly (7) and a second roller assembly (8) are movably mounted in the housing (1); a second clamping opening (9) is formed between the first roller assembly (7) and the second roller assembly (8); the first roller assembly (7) and the second roller assembly are subjected to force and are movable to adjust the size of the second clamping opening (9).

4. A pencil sharpener according to claim 3, characterized in that: The first clamping member (2) is provided with a first linkage part (23) connected to the first roller assembly (7); the first clamping member (2) slides through the first linkage part (23) to drive the first roller assembly (7) to swing; the second clamping member (3) is provided with a second linkage part (32) connected to the second roller assembly (8); the second clamping member (3) slides through the second linkage part (32) to drive the second roller assembly (8) to swing.

5. A pencil sharpener according to claim 4, characterized in that: The first linkage part (23) is provided with a first reset structure, and the first roller assembly (7) is reset by swinging through the first reset structure. The second linkage part (32) is provided with a second reset structure, and the second roller assembly (8) is reset by swinging through the second reset structure.

6. A pencil sharpener according to claim 5, characterized in that: The first linkage part (23) comprises a first link (231) and a second link (232), the second link (232) being configured as a first reset structure, the first roller assembly (7) being located between the first link (231) and the second link (232), the first link (231) and the second link (232) being coordinated to drive the first roller assembly (7) to swing up and down; the second linkage part (32) comprises a third link (321) and a fourth link (322), the third link (321) being configured as a second reset structure, the second roller assembly (8) being located between the third link (321) and the fourth link (322), the third link (321) and the fourth link (322) being coordinated to drive the second roller assembly (8) to swing up and down.

7. A pencil sharpener according to claim 5, characterized in that: The first linkage part (23) is provided with a connecting rod structure for driving the first roller assembly (7) to swing, and the first linkage part (23) is connected to a second reset elastic member (233), and the second reset elastic member (233) is configured as a first reset structure; the second linkage part (32) is provided with a connecting rod structure for driving the second roller assembly (8) to swing, and the second linkage part (32) is connected to a third reset elastic member (323), and the third reset elastic member (323) is configured as a second reset structure.

8. A pencil sharpener according to claim 4, characterized in that: A mounting seat (11) is provided in the housing (1), the first clamping member (2) and the second clamping member (3) are both mounted between the mounting seat (11) and the housing (1), and the first roller assembly (7) and the second roller assembly (8) are both mounted in the mounting seat (11).

9. A pencil sharpener according to claim 8, characterized in that: The mounting seat (11) is provided with a first through hole (111) and a second through hole (112); the first linkage portion (23) passes through the first through hole (111) to connect to the first roller assembly (7); the first linkage portion (23) and the first through hole (111) are slidably matched; the second linkage portion (32) passes through the second through hole (112) to connect to the second roller assembly (8); the second linkage portion (32) and the second through hole (112) are slidably matched.

10. A pencil sharpener according to claim 8, characterized in that: The mounting seat (11) is provided with a mounting groove (113) for accommodating the first clamping member (2) and the second clamping member (3); the first clamping member (2) and the second clamping member (3) are slidably mounted in the mounting groove (113).

11. A pencil sharpener according to claim 3, characterized in that: The first roller assembly (7) is provided with a first rotating end (71), and the second roller assembly (8) is provided with a second rotating end (81) which is arranged in the opposite direction to the first rotating end (71); the first rotating end (71) and the second rotating end (81) are both rotatably mounted on the housing (1); the first roller assembly (7) is provided with a first swinging end (72), and the second roller assembly (8) is provided with a second swinging end (82) which is arranged in the opposite direction to the first swinging end (72); the first roller assembly (7) and the second roller assembly are subjected to force and swing to adjust the size of the second clamping opening (9).

12. A pencil sharpener according to claim 1, characterized in that: A rotating shaft (61) is provided at one end of the switch (6), or a rotating shaft (61) is provided on the housing (1), the switch (6) is rotatably connected to the housing (1) via the rotating shaft (61), the other end of the switch (6) is in contact with the first clamping member (2), and the switch (6) is subjected to force and rotates to drive the first clamping member (2) to slide.

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