Electric pencil sharpener

Abstract

The utility model belongs to the technical field of pencil sharpeners, and particularly relates to an electric pencil sharpener which comprises a shell, a clamping and fixing device, a pencil advancing and retreating device, a pencil sharpening device and a driving device. The clamping and fixing device comprises a first clamping and fixing mechanism, a second clamping and fixing mechanism, a second clamping and fixing mechanism and a third clamping and fixing mechanism, and the first clamping and fixing mechanism is installed in the shell and provided with a first clamping position used for clamping a pencil; the second clamping and fixing mechanism is installed below the first clamping and fixing mechanism, and the second clamping and fixing mechanism is provided with a second clamping position and used for clamping a pencil; the first clamping mechanism and the second clamping mechanism are used for clamping and fixing the pencil, so that the pencil is ensured to be stably clamped, the pencil is prevented from inclining due to lack of clamping after being sharpened, and the pencil is prevented from directly falling off from the pencil sharpener; meanwhile, the clamping and fixing device can straighten the position of the pencil, it is guaranteed that the pencil does not incline when the pencil feeding and retracting device conveys the pencil into the pencil sharpening device, and the pencil sharpening quality is guaranteed.

Description

Technical Field

[0001] This technical solution relates to the field of pencil sharpener technology, specifically an electric pencil sharpener. Background Technology

[0002] Pencils are used very commonly in daily study and work, and electric pencil sharpeners are becoming increasingly common.

[0003] For example, Chinese patent CN201820127858.8 discloses an electric pencil sharpener, including: a housing, a pencil sharpener inside the housing, the pencil sharpener being driven by gear transmission, and a pencil advance and retraction device set on the top of the pencil sharpener. The pencil advance and retraction device uses two rollers that can hold the pencil to bring the pencil to be sharpened inward, thereby realizing a fully automatic cutting process.

[0004] However, it still has some shortcomings: the pencil sharpener has a through hole for inserting the pencil, but the pencil retraction mechanism is located below the pencil; the entire design lacks a part to hold the pencil in place. Because the pencil sharpener needs to accommodate pencils of different thicknesses, the diameter of the through hole is usually relatively large. When the pencil retraction mechanism moves the pencil, the pencil is prone to tilting, affecting the sharpening effect; in addition, after sharpening, when the pencil retraction mechanism removes the pencil, without a fixing device, the pencil may tip over or even fall directly out of the sharpener, causing the pencil to roll or the tip to be damaged. Summary of the Invention

[0005] The purpose of this technical solution is to provide an electric pencil sharpener that uses a first and a second clamping mechanism distributed vertically to hold the pencil, thereby improving the problem that pencil sharpeners cannot hold pencils.

[0006] The purpose of this technical solution is achieved as follows:

[0007] An electric pencil sharpener, comprising:

[0008] The casing has a through hole at its upper end for inserting a pencil;

[0009] A clamping device, which is installed inside the housing and located below the through hole, is used to hold a pencil inserted through the through hole;

[0010] A pencil advance / retract mechanism, installed below the locking device, is used to transport the pencil to a set position;

[0011] A pencil sharpening device, which is disposed inside the housing, is used to sharpen the pencil fed by the pencil advance and retract mechanism;

[0012] A drive unit, which is installed inside the housing, is used to drive the pencil sharpening device to perform pencil sharpening operations;

[0013] The locking device includes:

[0014] A first clamping mechanism is installed inside the housing and has a first clamping position for clamping the pencil.

[0015] The second locking mechanism is installed below the first locking mechanism, and the second locking mechanism has a second clamping position for clamping the pencil.

[0016] Preferably, the first locking mechanism includes:

[0017] Two first fasteners are arranged opposite each other and are slidably disposed on the housing. Each of the two first fasteners has a clamping part 1 at its close end, and the two clamping parts 1 form the first clamping position.

[0018] The first elastic element is movably connected to the two first fasteners, which is used to bring the two first fasteners closer to each other, so that the clamping part can clamp the pencil.

[0019] The clamping part has an arc-shaped groove, the sidewall of the arc-shaped groove has a guide surface, and the edge of the guide surface transitions arc-shapedly with the clamping part.

[0020] Preferably, the second locking mechanism includes:

[0021] Two opposing second fasteners are slidably mounted on the mounting base inside the housing, and each of the two second fasteners has a clamping part two at its close end, forming a second clamping position between the two clamping parts two;

[0022] The second elastic element is movably connected to the two second fasteners, which is used to bring the two second fasteners closer to each other, so that the clamping part can clamp the pencil.

[0023] The clamping part two has an arc-shaped groove two, and the side wall of the arc-shaped groove two has a guide surface two;

[0024] The lower end of the second fastener has a groove, and the upper end of the mounting base has a slider, which is slidably connected to the groove.

[0025] Preferably, the housing comprises: a mounting shell and a rotating shell, the rotating shell being rotatably disposed at the lower end of the mounting shell; the housing is provided with a gear adjustment device, the gear adjustment device comprising:

[0026] A push rod mechanism is installed inside the housing, and the upper end of the push rod mechanism extends movably into the pencil sharpening device to movably abut against the lower end of the pencil.

[0027] An adjustment mechanism, installed at the lower end of the push rod mechanism, is used to adjust the length of the upper end of the push rod mechanism extending into the pencil sharpening device;

[0028] The adjustment mechanism includes:

[0029] A support member is slidably disposed at the bottom of the inner side of the mounting housing. The upper end of the support member has a support portion. The upper end surface of the support portion is inclined along its sliding direction. The support portion movably abuts against the lower end of the push rod mechanism. The lower end of the support member has a connecting protrusion. The connecting protrusion extends from the clearance opening at the lower end of the mounting housing.

[0030] A transmission component is rotatably disposed in a rotating groove at the bottom of the outer side of the mounting housing. The front end of the transmission component is connected to a connecting protrusion one that extends into the rotating groove, and the rear end of the transmission component is connected to a connecting protrusion two of the rotating housing.

[0031] When the rotating shell rotates on the mounting shell, the second connecting protrusion drives the transmission component to rotate in the rotating groove, and the transmission component drives the support component to slide, so that the lower end of the top rod mechanism slides against the upper end surface of the support.

[0032] Preferably, the upper end face of the support has a plurality of positioning grooves, and the edges of adjacent positioning grooves are transitioned by a slope. The lower end of the top rod mechanism has a positioning part, which is movably engaged in the positioning groove.

[0033] Preferably, the push rod mechanism includes:

[0034] The mounting base is snapped into the mounting housing;

[0035] A sliding block is slidably disposed within the fixed base, and the lower end of the sliding block has a positioning part;

[0036] A third elastic element is installed between the fixed seat and the sliding block to allow the positioning part to move against the support part.

[0037] The lower end of the push rod body passes through the fixed base and is movably connected to the sliding block, while the upper end of the push rod body extends into the pencil sharpening device.

[0038] Preferably, the mounting shell includes an upper shell and a lower shell that are interlocked, with a gap between the upper shell and the lower shell;

[0039] The upper edge of the rotating shell has a convex edge, and the inner wall of the rotating shell has an anti-detachment block;

[0040] When the rotating shell is installed at the lower end of the mounting shell, the lower end of the upper shell moves against the upper edge of the rotating shell, and the protruding edge moves against the inner wall of the upper shell through the gap. The lower shell is placed inside the rotating shell, and the anti-detachment block moves against the upper end of the lower shell through the gap.

[0041] Preferably, the housing is provided with a dust plug, the dust plug having a connecting part and a dust-proof part, the connecting part being snapped onto the housing, and the dust-proof part having a sealing part and a fixing part;

[0042] When the sealing part moves against the edge of the through hole, the end of the fixing part is inserted into the through hole and engages with the first locking mechanism.

[0043] Preferably, the side wall of the fixing part is provided with an annular groove;

[0044] When the end of the fixing part is inserted into the through hole, the clamping part of the first locking mechanism engages with the annular groove, thereby engaging the fixing part with the first locking mechanism.

[0045] Preferably, a suction cup is provided at the bottom of the housing, and a protrusion is provided on the side of the suction cup, the protrusion protruding from the bottom of the housing.

[0046] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0047] 1. This technical solution is designed with a first clamping mechanism and a second clamping mechanism to clamp and fix the pencil, ensuring that the pencil is firmly clamped and preventing it from tilting due to lack of clamping after sharpening, thus avoiding the pencil falling directly from the pencil sharpener; at the same time, the clamping device can straighten the position of the pencil, ensuring that the pencil will not be tilted when the pencil advance and retract device transports the pencil into the pencil sharpener, thus ensuring the quality of pencil sharpening.

[0048] 2. The clamping part of this technical solution is designed with an arc-shaped groove at the front end. Its shape can not only firmly clamp the pencil, but also avoid damaging the pencil surface and ensure the pencil's appearance is intact.

[0049] 3. This technical solution is designed to control the height of the top rod mechanism by rotating the lower end of the mounting shell, thereby adjusting the thickness of the pen tip after sharpening. At the same time, it improves the overall simplicity, avoids safety hazards caused by small parts falling off, facilitates cleaning and maintenance, and allows users to adjust the height by rotating the mounting shell or rotating the shell, expanding the operating space and making it easier for children to use.

[0050] 4. The suction cup designed in this technical solution can adhere to the table surface, fit and fix it to the table surface, thus providing support when using the pencil sharpener and ensuring overall stability; at the same time, the design of the suction cup can also effectively reduce the vibration generated by the pencil sharpener during operation. By absorbing and dispersing these vibrations, the shock absorption effect is improved, making the pencil sharpening operation more stable. The protrusion design makes it easy for users to remove the suction cup from the table surface, making it convenient to use.

[0051] 5. The anti-loss dust plug designed in this technical solution can seal the through hole, effectively preventing dust and debris from entering the pencil sharpener through the through hole, keeping the inside of the pencil sharpener clean, extending the life of the pencil sharpener, reducing malfunctions caused by dust accumulation, and improving the user experience; at the same time, the anti-loss design of the connection part ensures that the dust plug is not easily lost, making it convenient for users to use and store at any time. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of this technical solution.

[0053] Figure 2 This is a cross-sectional view of the technical solution.

[0054] Figure 3 This is a schematic diagram of the first locking mechanism and the housing in this technical solution.

[0055] Figure 4 This is a schematic diagram of the second locking mechanism and the housing in this technical solution.

[0056] Figure 5 This is a schematic diagram of the structure of the first card firmware in this technical solution.

[0057] Figure 6 This is a schematic diagram of the dust plug and the first locking mechanism in this technical solution.

[0058] Figure 7 This is an exploded view of the second card and mounting base in this technical solution.

[0059] Figure 8 This is a partial structural diagram of the present technical solution without the rotating housing installed.

[0060] Figure 9 This is a partial structural diagram of the rotating shell installed in this technical solution.

[0061] Figure 10 This is a schematic diagram of the rotating shell structure of this technical solution.

[0062] Figure 11 This is a structural diagram of the lower shell, transmission components, and support components of this technical solution.

[0063] Figure 12 This is an exploded view of the lower shell, transmission components, and support components of this technical solution.

[0064] Reference numerals: 1. Housing; 10. Through hole; 11. Mounting housing; 111. Rotating groove; 1111. Rotating shaft; 12. Rotating housing; 13. Clearance opening; 14. Connecting protrusion two; 15. Upper housing; 16. Lower housing; 17. Protruding edge; 18. Anti-detachment block; 19. Gap;

[0065] 2. Locking device; 21. First locking mechanism; 211. First locking element; 212. Clamping part one; 213. First clamping position; 214. First elastic element; 215. Arc groove one; 216. Guide surface one;

[0066] 22. Second locking mechanism; 221. Second locking element; 222. Clamping part two; 223. Second clamping position; 224. Second elastic element; 225. Arc groove two; 226. Guide surface two; 227. Slide groove; 228. Slider;

[0067] 3. Pen advance / retract mechanism; 31. Mounting base; 4. Pen sharpening device; 5. Drive mechanism;

[0068] 6. Push rod mechanism; 61. Fixed seat; 62. Sliding block; 63. Third elastic element; 64. Push rod body; 65. Positioning part;

[0069] 7. Adjustment mechanism; 71. Support component; 72. Support part; 73. Connecting protrusion one; 74. Transmission component; 741. Slot one; 742. Slot two; 75. Positioning slot;

[0070] 8. Dust plug; 81. Connecting part; 82. Dustproof part; 83. Sealing part; 84. Fixing part; 85. Annular groove;

[0071] 9. Suction cup; 91. Protrusion; 100. Slide rail; 101. Anti-detachment part; 102. Sliding hole. Detailed Implementation

[0072] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0073] Example 1:

[0074] Combination Figures 1-4 An electric pencil sharpener, comprising:

[0075] The housing 1 has a through hole 10 at its upper end for inserting a pencil;

[0076] The locking device 2 is installed inside the housing 1 and located below the through hole 10, and is used to hold a pencil inserted through the through hole 10.

[0077] The pencil advance and retraction device 3 is installed below the locking device 2 and is used to transport the pencil to the set position, that is, to transport the pencil to the pencil sharpening device 4 for sharpening or to remove the sharpened pencil from the pencil sharpening device 4.

[0078] The pencil sharpening device 4 is installed inside the housing 1 and is used to sharpen the pencils fed by the pencil feeding and retracting device 3.

[0079] The drive unit 5 is installed inside the housing 1 and is used to drive the pencil sharpening device 4 to perform pencil sharpening operations.

[0080] The locking device 2 includes:

[0081] The first locking mechanism 21 is installed inside the housing 1 and has a first clamping position 213 for clamping the pencil; the pencil tip passes through the first clamping position 213 and the pencil body is clamped and fixed in the first clamping position 213.

[0082] The second locking mechanism 22 is installed below the first locking mechanism 21, and the second locking mechanism 22 has a second clamping position 223 for clamping the pencil; the pencil tip passes through the first clamping position 213 and the second clamping position 223 in sequence, and the pencil body is clamped and fixed in the first clamping position 213 and the second clamping position 223.

[0083] Combination Figure 2 , Figure 3 and Figure 5 The first locking mechanism 21 includes:

[0084] Two first fasteners 211 are arranged opposite to each other and are slidably mounted on the housing 1. Each of the two first fasteners 211 has a clamping part 212 at its close end. The two clamping parts 212 are arranged opposite to each other and form a first clamping position 213 between the two clamping parts 212. The pencil tip can pass through the two clamping parts 212 and the pencil body can be clamped and fixed by the two clamping parts 212.

[0085] The first elastic element 214 is a tension spring, a rubber band, or a rubber strip, which is movably connected to two first fasteners 211 to bring the two first fasteners 211 closer to each other, so that the clamping part 212 clamps the pencil.

[0086] The clamping part 212 has an arc-shaped groove 215. The lower edge of the arc-shaped groove 215 is used to abut against the pencil to clamp the pencil. The side wall of the arc-shaped groove 215 has a guide surface 216. The edge of the guide surface 216 and the clamping part 212 are arc-shaped. The guide surface 216 is an arc-shaped surface. The lower end of the guide surface 216 is connected to the lower edge of the arc-shaped groove 215. It is used to guide the pencil tip from the guide surface 216 to the lower edge of the arc-shaped groove 215, so that the pencil tip can be accurately moved into the second clamping position 223 of the second locking mechanism 22.

[0087] The clamping part 212 can be made of a material with elastic deformation, such as silicone or rubber. Alternatively, the clamping part 212 may have a deformation groove for elastic deformation, thereby achieving the contact force between the clamping part 212 and the pencil.

[0088] The upper inner wall of the housing 1 is provided with a slide rail 100, and the lower end of the slide rail has an anti-detachment part 101. The first fastener 211 is provided with a sliding hole 102. The slide rail 100 is inserted into the sliding hole 102, and the anti-detachment part 101 is movably abutted against the edge of the sliding hole 102. The first fastener 211 slides on the slide rail 100 through the sliding hole 102, so that the first fastener 211 is slidably set on the housing 1.

[0089] The first fastener 211 has a mounting post on its side wall, and the end of the first elastic member 214 is sleeved on the mounting post.

[0090] Combination Figure 2 , Figure 4 and Figure 7 The second locking mechanism 22 includes:

[0091] Two opposing second fasteners 221 are slidably mounted on a mounting base 31 inside the housing 1. The mounting base 31 is provided with a pen advance / retract device 3, and each of the two second fasteners 221 has a clamping part 222 at its close end, forming a second clamping position 223 between the two clamping parts 222. The pencil tip can pass through the two clamping parts 222, and the pencil body can be clamped and fixed by the two second clamping positions 223.

[0092] The second elastic element 224 is a tension spring, a rubber band, or a rubber ring, which is movably connected to two second fasteners 221 to bring the two second fasteners 221 closer to each other, so that the clamping part 222 can clamp the pencil.

[0093] The clamping part 222 has an arc-shaped groove 225, and the side wall of the arc-shaped groove 225 has a guide surface 226;

[0094] The lower end of the second fastener 221 has a groove 227, and the upper end of the mounting base 31 has a slider 228 and an insertion port. The side wall of the groove 227 is inserted into the mounting base 31 through the insertion port, and then the edge of the insertion port forms a slider 228, which is slidably connected to the groove 227.

[0095] The second fastener 221 is provided with a second mounting post, and the end of the second elastic member 224 is sleeved on the second mounting post.

[0096] Combination Figures 8-12 The housing 1 includes a mounting housing 11 and a rotating housing 12. The mounting housing 11 is used for mounting the drive device 5. The rotating housing 12 is rotatably disposed at the lower end of the mounting housing 11.

[0097] The housing 1 is provided with a gear adjustment device, which includes:

[0098] The push rod mechanism 6 is installed inside the housing 1, and the upper end of the push rod mechanism 6 extends movably into the pencil sharpening device 4 to movably abut against the lower end of the pencil.

[0099] Adjustment mechanism 7 is installed at the lower end of top rod mechanism 6 and is used to adjust the length of the upper end of top rod mechanism 6 extending into the pencil sharpening device 4, thereby adjusting the thickness of the pencil tip after sharpening.

[0100] The regulating mechanism 7 includes:

[0101] The support member 71 is slidably disposed at the bottom of the inner side of the mounting shell 11. The upper end of the support member 71 has a support part 72. The upper end surface of the support part 72 is inclined along its sliding direction. The support part 72 movably abuts against the lower end of the top rod mechanism 6. The lower end of the support member 71 has a connecting protrusion 73. The connecting protrusion 73 extends from the clearance opening 13 at the lower end of the mounting shell 11.

[0102] The transmission component 74 is rotatably disposed in the rotation groove 111 at the bottom of the outer side of the mounting shell 11. The front end of the transmission component 74 is provided with a first slot 741, which is movably connected to a first connecting protrusion 73 extending into the rotation groove 111. The rear end of the transmission component 74 is provided with a second slot 742, which is connected to a second connecting protrusion 14 of the rotating shell 12.

[0103] The middle part of the transmission component 74 is hinged to the rotating shaft 1111 at the bottom of the rotating groove 111, and the transmission component 74 rotates around the rotating shaft 1111 as the center.

[0104] When the rotating shell 12 rotates on the mounting shell 11, the connecting protrusion 2 14 drives the transmission component 74 to rotate in the rotating groove 111. The transmission component 74 drives the support component 71 to slide on the lower shell 16, so that the lower end of the push rod mechanism 6 slides against the upper end surface of the support part 72.

[0105] The upper end face of the support part 72 is inclined along its sliding direction. The lower end of the push rod mechanism 6 abuts against different positions of the upper end face of the support part 72, thereby adjusting the length of the upper end of the push rod mechanism 6 extending into the pencil sharpening device 4, thereby adjusting the thickness of the pencil tip after sharpening.

[0106] The upper end face of the support part 72 has several positioning grooves 75, and the edges of adjacent positioning grooves 75 are transitioned by a slope. The lower end of the push rod mechanism 6 has a positioning part 65, which is movably engaged in the positioning groove 75. Since the upper end face of the support part 72 is inclined along its sliding direction, the height of each positioning groove 75 is different. When the positioning part 65 is engaged in the positioning groove 75 at different positions, the length of the upper end of the push rod mechanism 6 extending into the pencil sharpening device 4 is also different, so that the push rod mechanism 6 cooperates with the pencil sharpening device 4 to achieve different thicknesses of the pencil tip after sharpening.

[0107] Combination Figure 8 and Figure 9 The push rod mechanism 6 includes:

[0108] The mounting base 61 is snapped into the mounting housing 11;

[0109] The sliding block 62 is slidably disposed within the fixed base 61, and the lower end of the sliding block 62 has a positioning part 65;

[0110] The third elastic element 63, which is a spring or disc spring, is installed between the fixed base 61 and the sliding block 62 to allow the positioning part 65 to move against the support part 72.

[0111] The lower end of the push rod body 64 passes through the fixed base 61 and is movably connected to the sliding block 62, and the upper end of the push rod body 64 extends into the pencil sharpening device 4.

[0112] When the sliding block 62 slides up and down on the fixed base 61, the push rod body 64 slides up and down along with the sliding block 62.

[0113] Combination Figures 8-12 The mounting shell 11 includes an upper shell 15 and a lower shell 16 that are interlocked with each other. The upper shell 15 and the lower shell 16 are interlocked with each other by a snap fastener, and a gap 19 is left between the lower edge of the upper shell 15 and the upper edge of the lower shell 16.

[0114] The upper edge of the rotating shell 12 has a raised edge 17, and the inner wall of the rotating shell 12 has an anti-detachment block 18;

[0115] When the rotating shell 12 is installed at the lower end of the mounting shell 11, the lower end of the upper shell 15 moves against the upper edge of the rotating shell 12, and the protruding edge 17 moves against the inner wall of the lower end of the upper shell 15 through the gap 19. The lower shell 16 is placed inside the rotating shell 12, and the anti-detachment block 18 moves against the upper end of the lower shell 16 through the gap 19.

[0116] When the rotating shell 12 rotates relative to the mounting shell 11, the anti-detachment block 18 slides within the gap 19 and along the upper end of the lower shell 16.

[0117] Combination Figure 2 and Figure 6 The housing 1 is provided with a dust plug 8, which is made of silicone or rubber and has a connecting part 81 and a dustproof part 82. The connecting part 81 is snapped onto the housing 1, and the dustproof part 82 has a sealing part 83 and a fixing part 84. The sealing part 83 abuts against the upper end of the housing 1 at the edge of the through hole 10 to seal the upper end of the through hole 10 and prevent dust from entering the through hole 10.

[0118] When the sealing part 83 moves against the edge of the through hole 10, the end of the fixing part 84 is inserted into the through hole 10 and engaged with the first locking mechanism 21.

[0119] Combination Figure 2 and Figure 6 The side wall of the fixing part 84 is provided with an annular groove 85;

[0120] When the end of the fixing part 84 is inserted into the through hole 10, the clamping part 212 of the first locking mechanism 21 is engaged with the annular groove 85. Specifically, the lower edge of the arc groove 215 abuts against the bottom and inner wall of the annular groove 85, thereby engaging the fixing part 84 with the first locking mechanism 21.

[0121] The bottom of the housing 1 is provided with a suction cup 9, and the side of the suction cup 9 has a protrusion 91. The protrusion 91 protrudes from the bottom of the housing 1 and is used for the user to hold or pinch it.

[0122] The driving device 5 includes: a battery, a motor, and a gear transmission assembly. The gear transmission assembly is connected to the motor drive end, and the drive gear of the gear transmission assembly is connected to the pencil sharpening device 4, thereby enabling the pencil sharpening device 4 to perform pencil sharpening operations.

[0123] The pen advance / retract mechanism 3, the pen sharpening mechanism 4, and the driving mechanism 5 are all existing technologies. For their specific structures and principles, please refer to the descriptions in Chinese patents CN201410077387.0, CN201520883774.3, CN202122616545.3, and CN201820127858.8. They will not be elaborated here.

[0124] Example 2:

[0125] The design scheme of this embodiment is basically the same as that of Embodiment 1, except that:

[0126] The first locking mechanism 21 is an integrally formed first locking plate. The first locking plate has an adjustment hole, and the inner wall of the adjustment hole is provided with a number of elastic parts that can undergo elastic deformation, thereby forming a first clamping position 213. The elastic parts are protrusions or spring sheets. The elastic parts clamp the pencil by elastically deforming and abutting against the pencil body. The principle and structure of the second locking mechanism 22 are the same as those of the first locking mechanism 21 in this embodiment.

[0127] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

[0128] It should be noted that the structures, proportions, and sizes depicted in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation of this technical solution and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this technical solution, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity and not intended to limit the scope of implementation of this technical solution. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the technical solution's implementation.

[0129] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0130] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. An electric pencil sharpener characterized by comprising: The utility model relates to a pencil sharpener, which comprises a housing (1) having a through hole (10) at its upper end for inserting a pencil; a clamping device (2) installed in the housing (1) below the through hole (10) for clamping the pencil inserted into the through hole (10); a pencil advancing and retracting device (3) installed below the clamping device (2) for conveying the pencil to a designated position; a pencil sharpening device (4) installed in the housing (1) for sharpening the pencil conveyed by the pencil advancing and retracting device (3); and a driving device (5) installed in the housing (1) for driving the pencil sharpening device (4) to perform the sharpening operation. The clamping device (2) comprises a first clamping mechanism (21) installed in the housing (1) and having a first clamping position (213) for clamping the pencil; and a second clamping mechanism (22) installed below the first clamping mechanism (21) and having a second clamping position (223) for clamping the pencil. The first clamping mechanism (21) comprises two first clamping members (211) oppositely arranged and each slidingly arranged on the housing (1), and each of the two first clamping members (211) has a clamping portion (212) at its end close to the other first clamping member (211), and the two clamping portions (212) form the first clamping position (213) therebetween; and a first elastic member (214) movably connected between the two first clamping members (211) for moving the two first clamping members (211) close to each other so that the clamping portions (212) clamp the pencil. The clamping portion (212) has an arc-shaped groove (215), and the side wall of the arc-shaped groove (215) has a guide surface (216), and the edge of the guide surface (216) is arc-shapedly connected to the clamping portion (212). The second clamping mechanism (22) comprises two second clamping members (221) oppositely arranged and each slidingly arranged on a mounting seat (31) in the housing (1), and each of the two second clamping members (221) has a clamping portion (222) at its end close to the other second clamping member (221), and the two clamping portions (222) form the second clamping position (223) therebetween; and a second elastic member (224) movably connected between the two second clamping members (221) for moving the two second clamping members (221) close to each other so that the clamping portions (222) clamp the pencil. The clamping portion (222) has an arc-shaped groove (225), and the side wall of the arc-shaped groove (225) has a guide surface (226). The lower end of the second clamping member (221) has a sliding groove (227), and the upper end of the mounting seat (31) has a sliding block (228) slidingly connected to the sliding groove (227). The utility model relates to a pencil sharpener, which comprises a housing (1) having a through hole (10) at its upper end for inserting a pencil; a clamping device (2) installed in the housing (1) below the through hole (10) for clamping the pencil inserted into the through hole (10); a pencil advancing and retracting device (3) installed below the clamping device (2) for conveying the pencil to a designated position; a pencil sharpening device (4) installed in the housing (1) for sharpening the pencil conveyed by the pencil advancing and retracting device (3); and a driving device (5) installed in the housing (1) for driving the pencil sharpening device (4) to perform the sharpening operation. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The shell (1) comprises: a mounting shell (11) and a rotating shell (12) which is rotatably arranged at the lower end of the mounting shell (11); the shell (1) is provided with a gear adjusting device, and the gear adjusting device comprises: A top rod mechanism (6) is mounted in the shell (1), and the upper end of the top rod mechanism (6) movably extends into the pencil sharpening device (4) and is used for movably abutting against the lower end of the pencil; An adjusting mechanism (7) is mounted at the lower end of the top rod mechanism (6) and is used for adjusting the length of the upper end of the top rod mechanism (6) extending into the pencil sharpening device (4); The adjusting mechanism (7) comprises: A support piece (71) is slidably arranged at the bottom of the inner side of the mounting shell (11), the upper end of the support piece (71) has a support portion (72), the upper end surface of the support portion (72) is obliquely arranged along the sliding direction thereof, the support portion (72) movably abuts against the lower end of the top rod mechanism (6), and the lower end of the support piece (71) has a connecting protrusion one (73) which extends out of the avoiding opening (13) at the lower end of the mounting shell (11); A transmission piece (74) is rotatably arranged in a rotating groove (111) at the bottom of the outer side of the mounting shell (11), the front end of the transmission piece (74) is connected with the connecting protrusion one (73), and the rear end of the transmission piece (74) is connected with a connecting protrusion two (14) of the rotating shell (12); When the rotating shell (12) rotates on the mounting shell (11), the connecting protrusion two (14) drives the transmission piece (74) to rotate in the rotating groove (111), the transmission piece (74) drives the support piece (71) to slide, so that the lower end of the top rod mechanism (6) slides and abuts against the upper end surface of the support portion (72).

5. The electric pencil sharpener according to claim 4, wherein: The upper end surface of the support portion (72) has a plurality of positioning grooves (75), the edges of the grooves of adjacent positioning grooves (75) are connected through inclined surfaces, the lower end of the top rod mechanism (6) has a positioning portion (65), and the positioning portion (65) movably clamps in the positioning groove (75).

6. The electric pencil sharpener according to claim 4 or 5, wherein: The top rod mechanism (6) comprises: A fixed seat (61) which is clamped in the mounting shell (11); A sliding block (62) which is slidably arranged in the fixed seat (61), and the lower end of the sliding block (62) has a positioning portion (65); A third elastic piece (63) which is mounted between the fixed seat (61) and the sliding block (62) and is used for movably abutting the positioning portion (65) against the support portion (72); A top rod body (64) which passes through the fixed seat (61) and movably connects the sliding block (62), and the upper end of the top rod body (64) extends into the pencil sharpening device (4).

7. The electric pencil sharpener according to claim 4, wherein: The mounting shell (11) comprises an upper shell (15) and a lower shell (16) which are engaged with each other, and a gap (19) is left between the upper shell (15) and the lower shell (16); The upper end of the edge of the rotating shell (12) is provided with a convex edge (17), and the inner wall of the rotating shell (12) is provided with an anti-falling block (18); When the rotating shell (12) is mounted at the lower end of the mounting shell (11), the lower end of the upper shell (15) is movably abutted against the upper end of the edge of the rotating shell (12), the convex edge (17) is movably abutted against the inner wall of the upper shell (15) through the gap (19), the lower shell (16) is arranged in the rotating shell (12), and the anti-falling block (18) is movably abutted against the upper end of the lower shell (16) through the gap (19).

8. The electric pencil sharpener according to claim 1, wherein: a dustproof plug (8) is arranged on the shell (1), the dustproof plug (8) is provided with a connecting part (81) and a dustproof part (82), the connecting part (81) is engaged with the shell (1), the dustproof part (82) is provided with a sealing part (83) and a fixing part (84); and when the sealing part (83) is movably abutted against the edge of the through hole (10), the end of the fixing part (84) is inserted into the through hole (10) and engaged with the first clamping mechanism (21).

9. The electric pencil sharpener according to claim 8, wherein: the side wall of the fixing part (84) is provided with a ring groove (85); and when the end of the fixing part (84) is inserted into the through hole (10), the clamping part I (212) of the first clamping mechanism (21) is movably engaged with the ring groove (85), so that the fixing part (84) is engaged with the first clamping mechanism (21).

10. The electric pencil sharpener according to claim 1, wherein: the bottom end of the shell (1) is provided with a suction cup (9), the side end of the suction cup (9) is provided with a convex block (91), and the convex block (91) protrudes from the bottom of the shell (1). ​ ​ ​ ​ ​

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