Single-switch floating type roving and spinning joint debugging electric pencil sharpener and floating joint debugging control method

Abstract

The invention discloses a single-switch floating type roving and spinning joint debugging electric pencil sharpener and a floating joint debugging control method. The single-switch floating type roving and spinning joint debugging electric pencil sharpener comprises a joint debugging assembly, a pencil sharpening assembly and a driving assembly. The joint debugging assembly comprises a control piece, a fixing piece and a limiting piece. The pencil sharpening assembly comprises a pencil feeding mechanism and a cutting mechanism; the driving assembly comprises a motor, a multi-stage trigger switch and a transmission mechanism; the pencil feeding mechanism and the cutting mechanism are fixedly connected through a fixing piece to form an integrated pencil sharpening mechanism capable of floating up and down; the integrated pencil sharpening mechanism floats up and down in the first floating interval under the control of the joint debugging assembly and is used for adjusting the thickness of a pencil point; the integrated pencil sharpening mechanism floats up and down in the second floating interval so as to trigger the multi-stage trigger switch, and automatic pencil feeding, automatic pencil sharpening and automatic pencil retreating are achieved; the stroke of the second floating section is larger than that of the first floating section; the mechanism has the advantages of high coordination, single-switch whole-process control, simple structure, space optimization and function expansibility improvement.

Description

Technical Field

[0001] This invention relates to a pencil sharpener, and more particularly to a single-switch floating-type electric pencil sharpener with adjustable nib thickness, which uses a floating adjustment method to achieve nib thickness adjustment and single-switch full-process control. Background Technology

[0002] With the increasing popularity of electric pencil sharpeners, consumers are no longer satisfied with single-function electric pencil sharpeners. Multifunctional electric pencil sharpeners that integrate multiple functions such as automatic pencil feeding, automatic pencil sharpening, automatic pencil retraction, pencil tip adjustment, and display screen are an inevitable development trend in the pencil sharpener industry.

[0003] Currently, a common type of electric pencil sharpener on the market, such as the one disclosed in the utility model patent with authorization number CN215792887U, features a pencil sharpener blade that can float up and down relative to the casing. In actual use, the user applies a certain amount of external force to insert the pencil into the sharpener blade, causing it to move downwards a certain distance. This, in turn, moves the rotating shaft connected to the sharpener blade downwards, triggering a microswitch. The microswitch then starts the motor, which in turn drives the drive assembly.

[0004] The advantage of this triggering method is that it conforms to the pencil sharpening operation habit and is convenient to combine with the automatic pencil retraction function. The disadvantage is that the trigger sensitivity is low. It cannot automatically feed the pencil as soon as it enters the pencil feeding channel. The pencil needs to be inserted into the pencil feeding mechanism and then further inserted before the motor can be triggered.

[0005] Existing solutions involve moving the trigger switch to the pencil feed position, such as the pre-start safety protection device for an electric pencil sharpener disclosed in the utility model patent with authorization announcement number CN222742447U. In this device, a micro switch is installed on the roller cutter fixing seat. To achieve seamless connection between pencil insertion and automatic pencil sharpening, at least part of the slider is distributed on the pencil feed channel. When the pencil is inserted, the slider is pushed and smoothly moves from the first position of the roller cutter fixing seat to the second position, triggering the micro switch and starting the motor.

[0006] The disadvantage of this triggering method is that, since the trigger switch is located in the pen feeding mechanism, it is difficult to combine it with the automatic pen retraction trigger function. It usually still requires a second trigger mechanism linked to the pen sharpening mechanism, resulting in a complex mechanism and increased cost. Furthermore, the user experience is not as good as the previous press-type method.

[0007] A common example of a pencil sharpener's nib adjustment mechanism is disclosed in invention patent CN113844201B, which describes an electric pencil sharpener with nib adjustment functionality. This electric pencil sharpener includes a housing with a pencil inlet hole on the top wall, a vertically positioned pencil sharpener blade within the housing, a motor drive assembly, and a nib adjustment mechanism. The nib adjustment mechanism mainly consists of a vertically movable push rod, a rotatable adjustment rod, and a reversing structure. By rotating the adjustment rod, the reversing structure converts the rotational motion of the adjustment rod into the vertical motion of the movable push rod, thereby adjusting the insertion depth of the pencil tip and achieving nib adjustment.

[0008] The disadvantage of this type of thickness adjustment mechanism is that the push rod is located in the lower middle part of the electric pencil sharpener, and the control part needs to be set on the side of the housing. This occupies the space on the side of the housing, making it difficult to expand other functions.

[0009] Therefore, how to solve the above problems and integrate various functions into one electric pencil sharpener, while minimizing parts and simplifying the structure, is a technical problem that urgently needs to be solved in the design of multifunctional electric pencil sharpeners. Summary of the Invention

[0010] The technical problem to be solved by this invention is to provide a single-switch floating electric pencil sharpener with adjustable nib thickness and a floating adjustment control method. Through the cooperation between components, it realizes the integration of multiple functions such as real-time automatic pen feeding, automatic pen retraction, and nib thickness adjustment, while taking into account cost reduction, ease of operation, and optimized user experience, and further creating conditions for the expansion of advanced functions.

[0011] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a single-switch floating coarse and fine adjustable electric pencil sharpener, including an adjustment component, a pencil sharpening component and a drive component; The joint adjustment component includes a control component, a fixing component, and a limiting component; a gear adjustment structure is provided between the control component and the fixing component, and an elastic reset structure is provided between the fixing component and the limiting component; The pencil sharpening assembly includes a pencil feeding mechanism and a cutting mechanism; The drive assembly includes a motor, a multi-stage trigger switch, and a transmission mechanism; The pen feeding mechanism and the cutting mechanism are fixedly connected by the fixing member to form an integrated pen sharpening mechanism that can float up and down; the integrated pen sharpening mechanism floats up and down within a first floating range under the control of the linkage component to adjust the pen tip thickness; the control member controls the integrated pen sharpening mechanism to float between the positions corresponding to each gear in the first floating range through the gear adjustment structure, and the elastic reset structure controls the integrated pen sharpening mechanism to reset. The integrated pencil sharpening mechanism moves downward within the second floating range to trigger a multi-stage trigger switch, start the motor, and drive the integrated pencil sharpening mechanism to automatically feed and cut; the integrated pencil sharpening mechanism moves upward and resets within the second floating range under the push of the elastic reset structure; when the cutting is completed, the multi-stage trigger switch is triggered a second time to start the motor to reverse and drive the integrated pencil sharpening mechanism to automatically retract the pencil. The travel distance of the second floating range is greater than that of the first floating range.

[0012] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the gear adjustment structure includes a plurality of gear levers disposed on the lower side of the control member and a plurality of gear slots disposed on the upper side of the fixing member. The gear slot is provided with several gears of different depths, and the adjacent gears are transitioned by an arc-shaped arch. The control component rotates relative to the fixed component, and the gear lever switches between gears in the gear slot to control the integrated pencil sharpening mechanism to float between the positions corresponding to each gear in the first floating range; the first floating range is the height difference between the deepest and shallowest positions of the gear slot.

[0013] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is that both the fixing member and the limiting member are cylindrical; The elastic reset structure includes a limiting ring disposed on the outer peripheral wall of the fixing member, an annular limiting surface disposed at the upper end of the limiting member, and a plurality of reset springs disposed between the limiting ring and the annular limiting surface. When the integrated pencil sharpening mechanism moves downward, the return spring is compressed; the elastic restoring force of the return spring pushes the integrated pencil sharpening mechanism upward to reset.

[0014] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: the fixing member is provided with a fixing plate; The fixing plate has a circular through hole, and a first connecting structure and a second connecting structure are symmetrically arranged around the center of the circular through hole; The pen feeding mechanism docks with the upper side of the fixed plate and rotates relative to it, and the first connecting structure is used to fix the pen feeding mechanism to the upper side of the fixed plate. The cutting mechanism docks with the lower side of the fixed plate and rotates relative to it, and the second connecting structure is used to fix the cutting mechanism to the lower side of the fixed plate.

[0015] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the cutting mechanism includes a tool holder and a hob disposed on the tool holder, and the tool holder is provided with a cutting space for inserting a pencil; The lower end of the tool holder is provided with a push rod, the upper end of the push rod extends into the cutting space, and the lower end of the push rod is connected to a multi-stage trigger switch; the upper end surface of the push rod is a stop surface. The integrated pencil sharpening mechanism floats up and down within the first floating range to change the depth of the stop surface extending into the cutting space, thereby adjusting the pencil tip thickness. When sharpening a pencil, the roller rotates around the cutting space to cut the pencil. As the cutting progresses, the pencil tip gradually moves downward along the cutting space. The pencil tip pushes against the stop surface, causing the push rod to trigger the multi-stage trigger switch a second time, starting the motor to reverse and drive the integrated pencil sharpening mechanism to automatically retract the pencil.

[0016] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the lower end of the tool holder is provided with a connector, the connector is provided with a push rod channel communicating with the cutting space, the push rod passes through the push rod channel and can float up and down in the push rod channel; The lower end of the push rod is provided with a first step structure, which is confined within the push rod channel.

[0017] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: the push rod triggers the multi-stage trigger switch twice through the top rod.

[0018] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the pen feeding mechanism includes a roller assembly, and a pen feeding channel is provided between the roller assemblies; The upper end of the tool holder is connected to and can drive the roller assembly; the lower end of the tool holder is provided with a connector. The transmission mechanism is a transmission gear set, and the last stage gear of the transmission gear set can float up and down; a sleeve is coaxially connected to the upper side of the last stage gear, and the sleeve is connected to and can drive the connector. The multi-stage trigger switch is located below the final stage gear; When a pencil is inserted into the pencil feeding channel, it pushes the integrated pencil sharpening mechanism to move downward within the second floating range. The connector pushes the final stage gear to move downward, thereby triggering the multi-stage trigger switch and starting the motor. The motor drives the tool holder to rotate via the transmission gear set, and the tool holder drives the roller assembly to rotate, so as to feed the pencil into the cutting space for cutting.

[0019] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a push rod channel is provided in the final stage gear and the sleeve, a push rod is inserted in the push rod channel, and the lower end of the push rod is in contact with the multi-stage trigger switch; When a pencil enters the pencil feeding channel, it pushes the integrated pencil sharpening mechanism to move downward within the second floating range. The connector pushes the final gear to move downward, and the final gear pushes the top rod to trigger the multi-stage trigger switch once.

[0020] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: the lower end of the push rod is provided with a second step structure, and the lower end of the final stage gear abuts against the upper end of the second step structure.

[0021] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: it further includes a housing; The housing includes a top cover; the top of the top cover is provided with a pen inlet and an arc-shaped groove; the handle of the control element extends out from the arc-shaped groove and can move within the arc-shaped groove; The limiting component is fixedly connected to the upper cover.

[0022] Another technical solution adopted by the present invention to solve the above-mentioned technical problems is: a floating joint adjustment control method, the controlled object of which is a single-switch floating coarse and fine joint adjustment electric pencil sharpener, including a joint adjustment component, a pencil sharpening component and a drive component; the joint adjustment component includes a control component, a fixing component and a limiting component; a gear adjustment structure is provided between the control component and the fixing component, and an elastic reset structure is provided between the fixing component and the limiting component; The pencil sharpening assembly includes a pencil feeding mechanism and a cutting mechanism; The drive assembly includes a motor, a multi-stage trigger switch, and a transmission mechanism; The pen feeding mechanism and the cutting mechanism are fixedly connected by the fixing member to form an integrated pen sharpening mechanism that can float up and down; The gear adjustment structure includes several gear levers disposed on the lower side of the control component and several gear slots disposed on the upper side of the fixing component, wherein several gears of different depths are provided in the gear slots. The cutting mechanism includes a tool holder and a hob disposed on the tool holder, and the tool holder has a cutting space for inserting a pencil. The lower end of the tool holder is provided with a push rod, the upper end of the push rod extends into the cutting space, and the upper end surface of the push rod is a stop surface; The pen feeding mechanism includes roller assemblies, and a pen feeding channel is provided between the roller assemblies; The upper end of the tool holder is connected to and can drive the roller assembly; the lower end of the tool holder is provided with a connector. The transmission mechanism is a transmission gear set, and the last stage gear of the transmission gear set can float up and down; a sleeve is coaxially connected to the upper side of the last stage gear, and the sleeve is connected to and can drive the connector. A push rod is inserted through the final stage gear and the sleeve. The upper end of the push rod contacts the lower end of the push rod, and the lower end of the push rod contacts the multi-stage trigger switch. The lower end of the push rod is provided with a second step structure, and the lower end of the final stage gear abuts against the upper end of the second step structure; Includes the following steps: Step 1: Adjust the pen tip thickness; rotate the control component relative to the fixed component, the gear lever switches between gears in the gear slot, and the integrated pen sharpening mechanism floats between the positions corresponding to each gear in the first floating range to change the depth of the stop surface of the push rod into the cutting space. Step 2: Automatic pencil feeding and sharpening; Insert the pencil into the feeding channel, push the integrated sharpening mechanism to move down within the second floating range, the connector pushes the final gear to move down, the final gear pushes the push rod to trigger the multi-stage trigger switch once, and start the motor; The motor drives the tool holder to rotate through the transmission gear set, and the tool holder drives the roller assembly to rotate so as to feed the pencil into the cutting space. The hob rotates with the tool holder to cut the pencil. Step 3: Automatic pencil retraction; As the cutting progresses, the pencil tip gradually moves downward along the cutting space, and the pencil tip pushes against the stop surface, causing the push rod to push the top rod to trigger the multi-stage trigger switch a second time, starting the motor to reverse. The motor drives the tool holder to rotate in the opposite direction via the transmission gear set, and the tool holder drives the roller assembly to rotate in the opposite direction, so as to sequentially eject the pencil from the cutting space and the pencil feeding channel.

[0023] Compared with the prior art, the advantages of this invention are: 1. Achieving full-process control with a single switch through high coordination between mechanisms. Through the high coordination between the joint adjustment component, the pencil sharpening component, and the drive component, the entire process of automatic pencil feeding → automatic pencil sharpening → automatic pencil retraction is achieved with only one multi-level trigger switch. The entire process is triggered immediately after the pencil enters the pencil feeding channel, without adding any independent trigger mechanism, thus optimizing and improving the user experience.

[0024] 2. Achieving structural simplification and improved reliability through a floating adjustment mechanism. By designing the integrated pencil sharpening mechanism to float within two different travel ranges, the triggering of the pencil sharpening process and the adjustment of the pencil tip thickness are seamlessly integrated; abandoning the traditional gear-driven thickness adjustment mechanism, a direct engagement of the gear lever and slot is adopted, resulting in a simpler structure and a lower failure rate.

[0025] 3. Through structural integration and space optimization, functional expandability is enhanced. The control components, fixing components, and limiting components are designed as concentric cylindrical structures, with the integrated pencil sharpening mechanism placed within, forming a compact concentric layered ring layout that significantly saves internal space. The pencil tip adjustment control is located on the upper part of the housing, freeing up side space for the expansion of additional functional modules such as displays, sensors, and controllers. The freed-up side space and compact internal structure provide the physical conditions for adding advanced functions such as battery display, intelligent sensing, and child locks. The floating joint adjustment control method has clear steps, facilitating subsequent intelligent upgrades (such as chip control integration, APP linkage, etc.). Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 Schematic diagram of a single-switch floating type coarse and fine adjustable electric pencil sharpener Figure 1 ; Figure 2 A cross-sectional view of the integrated pencil sharpening mechanism when it moves upward and resets within the second floating range; Figure 3 A cross-sectional view of the integrated pencil sharpening mechanism as it moves downward within the second floating range; Figure 4 A structural diagram of the linkage component, the pencil sharpening component, the push rod, and the multi-stage trigger switch; Figure 5 A perspective view of a single-switch floating electric pencil sharpener with adjustable coarseness when the gear lever is in the first gear position; Figure 6 A perspective view of a single-switch floating electric pencil sharpener with adjustable coarseness when the gear lever is in the second gear position; Figure 7 A perspective view of a single-switch floating electric pencil sharpener with adjustable coarseness when the gear lever is in the third gear position; Figure 8 for Figure 7 A sectional view; Figure 9 This is an exploded view of the linked components; Figure 10 Schematic diagram of the fastener structure Figure 1 ; Figure 11 This is a schematic diagram of the pen feeding mechanism; Figure 12A schematic diagram of the assembly relationship between the pen feeding mechanism and the fixing component. Figure 1 ; Figure 13 A schematic diagram of the assembly relationship between the pen feeding mechanism and the fixing component. Figure 2 ; Figure 14 Schematic diagram of the fastener structure Figure 2 (Gear slot hidden); Figure 15 This is a schematic diagram of the pencil sharpening mechanism; Figure 16 A schematic diagram of the assembly relationship between the pencil sharpening mechanism and the fixing component. Figure 1 ; Figure 17 A schematic diagram of the assembly relationship between the pencil sharpening mechanism and the fixing component. Figure 2 ; Explanation of reference numerals in the attached figures: A single-switch floating electric pencil sharpener with adjustable coarseness and fineness: 100, adjustment component 101, sharpening component 102, drive component 103, integrated sharpening mechanism 104, housing 105, pencil p, control component 10, gear lever 11, handle 12, spring retaining post b, fixing component 20, gear slot 21, gear position 22, first gear position 22a, second gear position 22b, third gear position 22c, arc-shaped arch 23, limiting ring 24, fixing plate 25, circular through hole 26, first latch m1, first locking rib m2, first locking block m3, first locking hook m4, first arc-shaped limiting rib m5, limiting component 30, annular limiting surface 31, return spring s, pencil feeding mechanism 40, roller assembly 41, pencil feeding channel 42, cutting mechanism 50, first locking... Mouth m1, First locking rib m2, First locking block m3, First locking hook m4, First arc-shaped limiting rib m5, Tool holder seat 51, Tool holder 52, Hob 53, Hob gear 53a, Gear ring 54, Cutting space 55, Connector head 56, Push rod channel 57, Stop surface t1, Push rod t, First step structure t2, Second locking cavity n1, Third step structure n2, Second locking block n3, Fourth step structure n4, Second arc-shaped limiting rib n5, Motor 60, Multi-stage trigger switch 70, Transmission mechanism 80, Transmission gear set 81, Final stage gear 82, Telescopic column 82a, Sleeve 83, Top rod channel 84, Base plate 85, Second return spring s2, Top rod d, Second step structure d1, Top cover 90, Pen inlet hole 91, Arc-shaped groove 92. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 3 The image shows a single-switch floating type adjustable coarse and fine electric pencil sharpener 100 according to this embodiment, including an adjustment component 101, a sharpening component 102, and a drive component 103. The adjustment component 101 includes a control element 10, a fixing element 20, and a limiting element 30. A gear adjustment structure is provided between the control element 10 and the fixing element 20, and an elastic reset structure is provided between the fixing element 20 and the limiting element 30.

[0030] The pencil sharpening assembly 102 includes a pencil feeding mechanism 40 and a cutting mechanism 50, and the drive assembly 103 includes a motor 60, a multi-stage trigger switch 70, and a transmission mechanism 80. The pencil feeding mechanism 40 and the cutting mechanism 50 are fixedly connected by the fixing member 20 to form an integrated pencil sharpening mechanism 104 that can float up and down.

[0031] The integrated sharpening mechanism 104, under the control of the coordinating component 101, floats up and down within a first floating range to adjust the pen tip thickness. The control element 10 controls the integrated sharpening mechanism 104 to float between positions corresponding to different settings within the first floating range via a gear adjustment structure, while an elastic reset structure controls the integrated sharpening mechanism 104 to reset. This process involves the coordinated action of each component during pen tip thickness adjustment.

[0032] The integrated pencil sharpening mechanism 104 moves downward within the second floating range, triggering the multi-stage trigger switch 70 to start the motor 60, driving the integrated pencil sharpening mechanism 104 to automatically feed and cut the pencil. When the external force is removed, the integrated pencil sharpening mechanism 104 moves upward and resets within the second floating range under the push of the elastic reset structure. When cutting is completed, the multi-stage trigger switch 70 is triggered a second time, starting the motor 60 in reverse, driving the integrated pencil sharpening mechanism 104 to automatically retract the pencil. This process involves the coordinated operation of various components during automatic pencil feeding, automatic sharpening, and automatic pencil retraction. The downward movement of the integrated pencil sharpening mechanism 104 within the second floating range is caused by the insertion of the pencil p.

[0033] The travel distance of the second floating range is greater than that of the first floating range.

[0034] It should be noted that the reset function of the elastic reset structure plays a role in the following two aspects during the pencil tip thickness adjustment process: First, it maintains the upward reset tendency of the integrated sharpening mechanism, thereby keeping the end of the shift lever at the bottom of the shift groove; second, when the shift adjustment mechanism switches from a deeper setting to a shallower setting, it pushes the integrated sharpening mechanism upward to reset, thus achieving the shift. During automatic pencil feeding, automatic sharpening, and automatic retraction, it plays a role in the following aspect: when the force applied by the pencil p to the integrated sharpening mechanism is removed, the elastic reset structure pushes the integrated sharpening mechanism upward to reset.

[0035] like Figures 4 to 8 As shown, the gear adjustment structure includes several gear levers 11 disposed on the lower side of the control member 10 and several gear slots 21 disposed on the upper side of the fixing member 20. Several gear positions 22 of different depths are provided within the gear slots 21, with adjacent gear positions 22 transitioning between each other by an arc-shaped arch 23. Thus, the gear position 22 is recessed relative to the arc-shaped arch 23, allowing the gear lever 11 to be held within a certain gear position 22. The arc-shaped arch 23 guides the movement of the gear lever 11 between adjacent gear positions 22.

[0036] When adjusting the pen tip thickness, the control component 10 is rotated relative to the fixed component 20, and the gear lever 11 switches between gear positions 22 within the gear position groove 21 to control the integrated pen sharpening mechanism 104 to float between the positions corresponding to each gear position in the first floating range. The first floating range is the height difference between the deepest and shallowest positions of the gear position groove 21.

[0037] The control component 10 is ring-shaped, with two handles 12 on its upper side for user operation. The lower side of the control component 10 has four gear levers 11, arranged orthogonally. The upper side of the fixing component 20 has four gear slots 21, also orthogonally arranged, to improve the stability of the gear adjustment structure. Each gear slot 21 contains three gears 22. Figure 5 The deepest first gear 22a Figure 6 The middle second gear 22b Figure 7 The shallowest third setting 22c corresponds to fine, medium, and coarse nib thicknesses, respectively. The shallowest position of the setting groove 21 is the top of the arched protrusion 23 adjacent to the shallowest third setting 22c, and the deepest position is the deepest first setting 22a. The first floating range is the height difference between the two. When the setting lever 11 moves from the deep position to the shallower position within the setting groove 21, the integrated sharpening mechanism 104 floats downwards; conversely, when the setting lever 11 moves from the shallower position to the deeper position within the setting groove 21, the integrated sharpening mechanism 104 floats upwards.

[0038] like Figure 9As shown, both the fixing member 20 and the limiting member 30 are cylindrical. A limiting ring 24 is provided on the outer peripheral wall of the fixing member 20, and an annular limiting surface 31 is provided at the upper end of the limiting member 30. The elastic reset structure includes the limiting ring 24 provided on the outer peripheral wall of the fixing member 20, the annular limiting surface 31 provided at the upper end of the limiting member 30, and a plurality of reset springs s provided between the limiting ring 24 and the annular limiting surface 31. A spring retaining post b protrudes from the lower side of the limiting ring 24, and the reset springs s are sleeved on the spring retaining post b. In this embodiment, three reset springs s are used, evenly arranged between the limiting ring 24 and the annular limiting surface 31 at 120° intervals.

[0039] When the integrated pencil sharpening mechanism 104 moves downward, the return spring s is compressed. The elastic restoring force of the return spring s pushes the integrated pencil sharpening mechanism 104 upward to reset. Preferably, the return spring s can be set to have a certain degree of pre-compression, that is, when the integrated pencil sharpening mechanism 104 floats to its upper limit position, the return spring s is still in a slightly compressed state.

[0040] like Figures 10 to 17 As shown, a fixing plate 25 is provided on the fixing member 20. A circular through hole 26 is provided on the fixing plate 25, and a first connecting structure and a second connecting structure are symmetrically arranged around the center of the circular through hole 26. The pen feeding mechanism 40 is mated with the upper side of the fixing plate 25 and rotates relative to it. The first connecting structure is used to fix the pen feeding mechanism 40 to the upper side of the fixing plate 25. The cutting mechanism 50 is mated with the lower side of the fixing plate 25 and rotates relative to it. The second connecting structure is used to fix the cutting mechanism 50 to the lower side of the fixing plate 25.

[0041] Specifically, such as Figures 10 to 13 As shown, the first connecting structure includes a pair of first latches m1 on both sides of the circular through hole 26, and a first retaining rib m2 disposed on the lower side of the fixing plate 25 and beside the first latches m1. A pair of first latch blocks m3 are symmetrically provided at the bottom of the pen feeding mechanism 40, and the ends of the first latch blocks m3 have first hooks m4. During assembly, the pen feeding mechanism 40 mates with the upper side of the fixing plate 25, the first latch blocks m3 engage with the first latches m1, the pen feeding mechanism 40 rotates relative to the fixing plate 25, and the first hooks m4 pass over the edge of the first retaining rib m2 and are restrained by the first retaining rib m2, thereby fixing the pen feeding mechanism 40 to the upper side of the fixing plate 25.

[0042] Furthermore, the bottom of the pen feeding mechanism 40 is also provided with a first arc-shaped limiting rib m5. The first arc-shaped limiting rib m5 abuts against the inner wall of the circular through hole 26. The cooperation between the first arc-shaped limiting rib m5 and the circular through hole 26 can play a guiding role during assembly and a positioning and limiting role after assembly.

[0043] The cutting mechanism 50 includes a tool holder 51, a tool holder 52 disposed within the tool holder 51, a hob 53 disposed on the tool holder 52, and a gear ring 54 disposed on the upper inner side of the tool holder 51. The tool holder 52 has a cutting space 55 for inserting a pencil p. The upper end of the hob 53 is provided with a hob gear 53a, which meshes with the gear ring 54. When the tool holder 52 rotates, the hob 53 simultaneously rotates on its own axis and revolves around the cutting space 55, thereby cutting the pencil p within the cutting space 55.

[0044] like Figures 14 to 17 As shown, the second connecting structure includes a pair of second locking cavities n1 protruding from the lower side of the fixing plate 25, and the second locking cavities n1 are provided with a third step structure n2. A pair of second locking blocks n3 are provided symmetrically at the top of the tool holder 51, and the second locking blocks n3 are provided with a fourth step structure n4.

[0045] During assembly, the cutting mechanism 50 docks with the lower side of the fixed plate 25, the second locking block n3 enters the second locking cavity n1 from the side entrance of the second locking cavity n1, and the third step structure n2 and the fourth step structure n4 restrict each other to fix the cutting mechanism 50 to the lower side of the fixed plate 25.

[0046] Furthermore, a second arc-shaped limiting rib n5 is provided on the lower side of the fixing plate 25. The second arc-shaped limiting rib n5 abuts against the cylindrical edge of the tool holder 51. The cooperation between the second arc-shaped limiting rib n5 and the cylindrical edge of the tool holder 51 can also play a guiding role during assembly and a positioning and limiting role after assembly.

[0047] like Figures 4 to 8 As shown, the lower end of the tool holder 52 is provided with a push rod t, the upper end of the push rod t extends into the cutting space 55, the lower end of the push rod t is connected to a multi-stage trigger switch 70, and the upper end surface of the push rod t is a stop surface t1. The integrated pencil sharpening mechanism 104 floats up and down within the first floating range to change the depth of the stop surface t1 extending into the cutting space 55, thereby adjusting the pencil tip thickness.

[0048] Specifically, such as Figures 5 to 7 As shown, when the gear lever 11 is in the deepest first gear position 22a, the stop surface t1 extends into the cutting space 55 to the shallowest depth, and the pen tip thickness is correspondingly fine; when the gear lever 11 is in the middle second gear position 22b, the stop surface t1 extends into the cutting space 55 to the middle depth, and the pen tip thickness is correspondingly medium; when the gear lever 11 is in the shallowest third gear position 22c, the stop surface t1 extends into the cutting space 55 to the deepest depth, and the pen tip thickness is correspondingly coarse.

[0049] When sharpening a pencil, the roller 53 rotates around the cutting space 55 to cut the pencil p. As the cutting progresses, the tip of the pencil p gradually moves down along the cutting space 55 until the tip of the pencil p pushes against the stop surface t1, causing the push rod t to trigger the multi-stage trigger switch 70 for a second time, starting the motor 60 to reverse, thereby driving the integrated pencil sharpening mechanism 104 to automatically retract the pencil.

[0050] like Figure 8 As shown, the lower end of the tool holder 52 is provided with a connector 56, and the connector 56 has a push rod channel 57 communicating with the cutting space 55. The push rod t passes through the push rod channel 57 and can float up and down within the push rod channel 57. The lower end of the push rod t is provided with a first step structure t2, which is confined within the push rod channel 57, thereby keeping the push rod t within the push rod channel 57.

[0051] like Figures 2 to 4 , Figure 8 As shown, the push rod t triggers the multi-stage trigger switch 70 a second time via the push rod d. The upper end of the push rod d contacts the lower end of the push rod t, and the lower end of the push rod d contacts the multi-stage trigger switch 70. The tip of the pencil p pushes against the stop surface t1, and the push rod t pushes the push rod d to trigger the multi-stage trigger switch 70 a second time.

[0052] like Figure 2 , Figure 3 and Figure 8 As shown, the pen feeding mechanism 40 includes roller assemblies 41, with a pen feeding channel 42 between the roller assemblies 41. The upper end of the blade holder 52 is connected to and can drive the roller assemblies 41. The structure, driving principle, and how to achieve so-called automatic pen feeding in the roller assembly 41 of the pen feeding mechanism 40 are all existing technologies in the fields of hand-cranked and electric pen sharpeners. For example, the technical solution disclosed in the three-wheeled pen feeding mechanism of the pen sharpener, as authorized by utility model patent CN223443181U, can be consulted.

[0053] like Figure 2 , Figure 3 , Figures 5 to 8 As shown, the transmission mechanism 80 is a transmission gear set 81, which is mounted on the base plate 85. The final stage gear 82 of the transmission gear set 81 can float up and down. A sleeve 83 is coaxially connected to the upper side of the final stage gear 82, and the sleeve 83 is connected to and can drive the connector 56 at the lower end of the tool holder 52. A second return spring s2 is provided between the final stage gear 82 and the base plate 85, and its elastic restoring force is used to move the final stage gear 82 upward and reset it.

[0054] A multi-stage trigger switch 70 is located below the final stage gear 82. When pencil p is inserted into the pencil feed channel 42, it pushes the integrated pencil sharpening mechanism 104 downward within the second floating range. The connector 56 pushes the final stage gear 82 downward, triggering the multi-stage trigger switch 70 to start the motor 60. The motor 60 drives the tool holder 52 to rotate via the transmission gear set 81. The tool holder 52 drives the roller assembly 41 to rotate, thus feeding the pencil p into the cutting space 55 for cutting.

[0055] The bottom of the final stage gear 82 is provided with a telescopic column 82a. A push rod 84 channel is provided through the final stage gear 82, sleeve 83 and telescopic column 82. The push rod d passes through the push rod channel 84, and the lower end of the push rod d contacts the multi-stage trigger switch 70. The lower end of the push rod d is provided with a second step structure d1. The lower end of the telescopic column 82a can extend from the lower side of the base plate 85 and abut against the upper end of the second step structure d1.

[0056] When pencil p enters the pencil feeding channel 42, it pushes the integrated pencil sharpening mechanism 104 to move down within the second floating range. The connector 56 pushes the final gear 82 to move down, and the final gear 82 pushes the top rod d to trigger the multi-stage trigger switch once.

[0057] like Figures 1 to 3 As shown, the single-switch floating type adjustable pencil sharpener 100 also includes a housing 105. The housing 105 includes a top cover 90, the top of which has a pencil inlet hole 91 and an arc-shaped groove 92. The handle 12 of the control member 10 extends out of the arc-shaped groove 92 and can move within the arc-shaped groove 92. The limiting member 30 is fixedly connected to the top cover 90. Furthermore, the annular control member 10, the cylindrical fixing member 20, and the limiting member 30 make the overall adjustment assembly 101 cylindrical, forming a concentric rotary adjustment mechanism. The integrated pencil sharpening mechanism 104 is disposed inside the cylinder of the adjustment assembly 101, thus forming a concentric stacked ring structure.

[0058] Therefore, compared to the existing nib adjustment mechanisms, the single-switch floating-type electric pencil sharpener 100 provided by this invention allows the control element 10 for adjusting the nib thickness to be located on the upper part of the housing 105, and the handle 12 to be located on the upper cover 90. This frees up internal space in the pencil sharpener's body and side space in the housing, allowing for the expansion of other functional components, such as accommodating sensors, controllers, or other similar devices. Figure 1 As shown, a display screen and display window are added to the side of the housing 105. At the same time, the complex gear transmission structure of the pen tip thickness adjustment mechanism in the prior art is abandoned, and a simplified and reliable concentric stacked ring structure is used for adjustment drive, which reduces the failure rate of the mechanism and significantly reduces manufacturing costs.

[0059] The following describes the floating control method provided by the present invention, using the single-switch floating coarse-fine adjustable electric pencil sharpener 100 provided in this embodiment as the controlled object. The method includes the following steps: Step 1: Adjust the pen tip thickness; control the control component 10 with the handle, rotate the control component 10 relative to the fixed component 20, the gear lever 11 switches between gear positions 22 in the gear slot 21, the integrated pen sharpening mechanism 104 floats between the corresponding positions of each gear in the first floating range, so as to change the depth of the stop surface t1 of the push rod t into the cutting space 55. When the gear lever 11 is held in any gear position 22 in the gear slot 21, the integrated pen sharpening mechanism 104 is held in the position corresponding to that gear in the first floating range, and the stop surface t1 of the push rod t extends into the cutting space 55 to a corresponding depth.

[0060] Step 2: Automatic pencil feeding and sharpening; Insert pencil p into pencil feeding channel 42, push integrated sharpening mechanism 104 to move down in the second floating range, connector 56 pushes final gear 82 down, final gear 82 pushes top rod d to trigger multi-stage trigger switch 70 at once, start motor 60.

[0061] The motor 60 drives the tool holder 52 to rotate through the transmission gear set 81. The tool holder 52 drives the roller assembly 41 to rotate, so as to feed the pencil p into the cutting space 55, realizing instant automatic pencil feeding. Simultaneously, the hob 53 rotates with the tool holder 52 to cut the pencil, realizing instant automatic pencil sharpening.

[0062] During this process, when the multi-level trigger switch 70 is triggered once and the motor 60 starts, the user can remove the external force applied to the pencil p, or even release it directly. The subsequent automatic pencil feeding, automatic pencil sharpening, and even the subsequent automatic pencil retraction will all be completed automatically. The integrated pencil sharpening mechanism 104 moves upward and resets in the second floating range under the push of the elastic reset structure.

[0063] Step 3: Automatic pencil retraction; As the cutting progresses, the tip of pencil p gradually moves downward along the cutting space 55. The tip of pencil p pushes against the stop surface t1, which means that pencil p has reached the thickness set in Step 1. This causes the push rod t to push the top rod d to trigger the multi-stage trigger switch 70 a second time, starting the motor 60 to reverse.

[0064] The motor 60 drives the tool holder 52 to rotate in the opposite direction through the transmission gear set 81, and the tool holder 52 drives the roller assembly 51 to rotate in the opposite direction, so as to sequentially remove the pencil p from the cutting space 55 and the pencil feeding channel 42.

[0065] In summary, the single-switch floating coarse-fine adjustable electric pencil sharpener and floating adjustable control method provided by this invention have beneficial effects in at least the following three aspects: 1. Achieve full-process control with a single switch through high coordination between mechanisms. By working closely together with the joint debugging component, the pencil sharpening component, and the drive component, the entire process of automatic pencil feeding, automatic pencil sharpening, and automatic pencil retraction is achieved with only a single multi-level trigger switch. The entire process is triggered immediately after the pencil enters the feeding channel, without adding any independent triggering mechanism, thus optimizing and improving the user experience.

[0066] 2. Achieving structural simplification and improved reliability through a floating adjustment mechanism. By designing the integrated pencil sharpening mechanism to float within two different travel ranges, the triggering of the pencil sharpening process and the adjustment of the pencil tip thickness are seamlessly integrated; abandoning the traditional gear-driven thickness adjustment mechanism, a direct engagement of the gear lever and slot is adopted, resulting in a simpler structure and a lower failure rate.

[0067] 3. Through structural integration and space optimization, functional expandability is enhanced. The control components, fixing components, and limiting components are designed as concentric cylindrical structures, with the integrated pencil sharpening mechanism placed within, forming a compact concentric layered ring layout that significantly saves internal space. The pencil tip adjustment control is located on the upper part of the housing, freeing up side space for the expansion of additional functional modules such as displays, sensors, and controllers. The freed-up side space and compact internal structure provide the physical conditions for adding advanced functions such as battery display, intelligent sensing, and child locks. The floating joint adjustment control method has clear steps, facilitating subsequent intelligent upgrades (such as chip control integration, APP linkage, etc.).

[0068] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0069] The single-switch floating coarse-fine adjustable electric pencil sharpener and its floating adjustable control method provided by this invention have been described above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand this invention and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A single-switch floating type electric pencil sharpener with adjustable coarseness and fineness, characterized in that: This includes the integration components, the pencil sharpening components, and the driver components; The joint adjustment component includes a control component, a fixing component, and a limiting component; a gear adjustment structure is provided between the control component and the fixing component, and an elastic reset structure is provided between the fixing component and the limiting component; The pencil sharpening assembly includes a pencil feeding mechanism and a cutting mechanism; The drive assembly includes a motor, a multi-stage trigger switch, and a transmission mechanism; The pen feeding mechanism and the cutting mechanism are fixedly connected by the fixing member to form an integrated pen sharpening mechanism that can float up and down; the integrated pen sharpening mechanism floats up and down within a first floating range under the control of the linkage component to adjust the pen tip thickness; the control member controls the integrated pen sharpening mechanism to float between the positions corresponding to each gear in the first floating range through the gear adjustment structure, and the elastic reset structure controls the integrated pen sharpening mechanism to reset. The integrated pencil sharpening mechanism moves downward within the second floating range to trigger a multi-stage trigger switch, start the motor, and drive the integrated pencil sharpening mechanism to automatically feed and cut; the integrated pencil sharpening mechanism moves upward and resets within the second floating range under the push of the elastic reset structure; when the cutting is completed, the multi-stage trigger switch is triggered a second time to start the motor to reverse and drive the integrated pencil sharpening mechanism to automatically retract the pencil. The travel distance of the second floating range is greater than that of the first floating range.

2. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: The gear adjustment structure includes several gear levers disposed on the lower side of the control component and several gear slots disposed on the upper side of the fixing component. The gear slot is provided with several gears of different depths, and the adjacent gears are transitioned by an arc-shaped arch. The control component rotates relative to the fixed component, and the gear lever switches between gears in the gear slot to control the integrated pencil sharpening mechanism to float between the positions corresponding to each gear in the first floating range; the first floating range is the height difference between the deepest and shallowest positions of the gear slot.

3. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: Both the fixing member and the limiting member are cylindrical; The elastic reset structure includes a limiting ring disposed on the outer peripheral wall of the fixing member, an annular limiting surface disposed at the upper end of the limiting member, and a plurality of reset springs disposed between the limiting ring and the annular limiting surface. When the integrated pencil sharpening mechanism moves downward, the return spring is compressed; the elastic restoring force of the return spring pushes the integrated pencil sharpening mechanism upward to reset.

4. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: The fastener is provided with a fixing plate; The fixing plate has a circular through hole, and a first connecting structure and a second connecting structure are symmetrically arranged around the center of the circular through hole; The pen feeding mechanism docks with the upper side of the fixed plate and rotates relative to it, and the first connecting structure is used to fix the pen feeding mechanism to the upper side of the fixed plate. The cutting mechanism docks with the lower side of the fixed plate and rotates relative to it, and the second connecting structure is used to fix the cutting mechanism to the lower side of the fixed plate.

5. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: The cutting mechanism includes a tool holder and a hob disposed on the tool holder, and the tool holder has a cutting space for inserting a pencil. The lower end of the tool holder is provided with a push rod, the upper end of the push rod extends into the cutting space, and the lower end of the push rod is connected to a multi-stage trigger switch; the upper end surface of the push rod is a stop surface. The integrated pencil sharpening mechanism floats up and down within the first floating range to change the depth of the stop surface extending into the cutting space, thereby adjusting the pencil tip thickness. When sharpening a pencil, the roller rotates around the cutting space to cut the pencil. As the cutting progresses, the pencil tip gradually moves downward along the cutting space. The pencil tip pushes against the stop surface, causing the push rod to trigger the multi-stage trigger switch a second time, starting the motor to reverse and drive the integrated pencil sharpening mechanism to automatically retract the pencil.

6. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 5, characterized in that: The lower end of the tool holder is provided with a connector, and the connector is provided with a push rod channel communicating with the cutting space. The push rod passes through the push rod channel and can float up and down within the push rod channel. The lower end of the push rod is provided with a first step structure, which is confined within the push rod channel.

7. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 5, characterized in that: The push rod triggers the multi-stage trigger switch a second time via the push rod.

8. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: The pen feeding mechanism includes roller assemblies, and a pen feeding channel is provided between the roller assemblies; The upper end of the tool holder is connected to and can drive the roller assembly; the lower end of the tool holder is provided with a connector. The transmission mechanism is a transmission gear set, and the last stage gear of the transmission gear set can float up and down; a sleeve is coaxially connected to the upper side of the last stage gear, and the sleeve is connected to and can drive the connector. The multi-stage trigger switch is located below the final stage gear; When a pencil is inserted into the pencil feeding channel, it pushes the integrated pencil sharpening mechanism to move downward within the second floating range. The connector pushes the final stage gear to move downward, thereby triggering the multi-stage trigger switch and starting the motor. The motor drives the tool holder to rotate via the transmission gear set, and the tool holder drives the roller assembly to rotate, so as to feed the pencil into the cutting space for cutting.

9. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 8, characterized in that: The final stage gear and the sleeve are provided with a push rod channel, and a push rod is inserted through the push rod channel. The lower end of the push rod is in contact with the multi-stage trigger switch. When a pencil enters the pencil feeding channel, it pushes the integrated pencil sharpening mechanism to move downward within the second floating range. The connector pushes the final gear to move downward, and the final gear pushes the top rod to trigger the multi-stage trigger switch once.

10. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 9, characterized in that: The lower end of the push rod is provided with a second step structure, and the lower end of the final stage gear abuts against the upper end of the second step structure.

11. The single-switch floating type coarse and fine adjustable electric pencil sharpener according to claim 1, characterized in that: It also includes the casing; The housing includes a top cover; the top of the top cover is provided with a pen inlet and an arc-shaped groove; the handle of the control element extends out from the arc-shaped groove and can move within the arc-shaped groove; The limiting component is fixedly connected to the upper cover.

12. A floating joint control method, characterized in that: Its controlled object is a single-switch floating type coarse and fine adjustable electric pencil sharpener, including an adjustment component, a sharpening component and a drive component; the adjustment component includes a control component, a fixing component and a limiting component; the control component and the fixing component are provided with a gear adjustment structure, and the fixing component and the limiting component are provided with an elastic reset structure; The pencil sharpening assembly includes a pencil feeding mechanism and a cutting mechanism; The drive assembly includes a motor, a multi-stage trigger switch, and a transmission mechanism; The pen feeding mechanism and the cutting mechanism are fixedly connected by the fixing member to form an integrated pen sharpening mechanism that can float up and down; The gear adjustment structure includes several gear levers disposed on the lower side of the control component and several gear slots disposed on the upper side of the fixing component, wherein several gears of different depths are provided in the gear slots. The cutting mechanism includes a tool holder and a hob disposed on the tool holder, and the tool holder has a cutting space for inserting a pencil. The lower end of the tool holder is provided with a push rod, the upper end of the push rod extends into the cutting space, and the upper end surface of the push rod is a stop surface; The pen feeding mechanism includes roller assemblies, and a pen feeding channel is provided between the roller assemblies; The upper end of the tool holder is connected to and can drive the roller assembly; the lower end of the tool holder is provided with a connector. The transmission mechanism is a transmission gear set, and the last stage gear of the transmission gear set can float up and down; a sleeve is coaxially connected to the upper side of the last stage gear, and the sleeve is connected to and can drive the connector. A push rod is inserted through the final stage gear and the sleeve. The upper end of the push rod contacts the lower end of the push rod, and the lower end of the push rod contacts the multi-stage trigger switch. The lower end of the push rod is provided with a second step structure, and the lower end of the final stage gear abuts against the upper end of the second step structure; Includes the following steps: Step 1: Adjust the pen tip thickness; rotate the control component relative to the fixed component, the gear lever switches between gears in the gear slot, and the integrated pen sharpening mechanism floats between the positions corresponding to each gear in the first floating range to change the depth of the stop surface of the push rod into the cutting space. Step 2: Automatic pencil feeding and sharpening; Insert the pencil into the feeding channel, push the integrated sharpening mechanism to move down within the second floating range, the connector pushes the final gear to move down, the final gear pushes the push rod to trigger the multi-stage trigger switch once, and start the motor; The motor drives the tool holder to rotate through the transmission gear set, and the tool holder drives the roller assembly to rotate to feed the pencil into the cutting space. The hob rotates with the tool holder to cut the pencil. Step 3: Automatic pencil retraction; As the cutting progresses, the pencil tip gradually moves downward along the cutting space, and the pencil tip pushes against the stop surface, causing the push rod to push the top rod to trigger the multi-stage trigger switch a second time, starting the motor to reverse; The motor drives the tool holder to rotate in the opposite direction via the transmission gear set, and the tool holder drives the roller assembly to rotate in the opposite direction, so as to sequentially eject the pencil from the cutting space and the pencil feeding channel.

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