A pencil sharpener with a mechanism for adjusting the thickness of the pencil tip and displaying the selected thickness

Abstract

The utility model discloses a kind of pen point thickness adjusting mechanism with gear display and pencil sharpener, wherein pen point thickness adjusting mechanism with gear display includes knob, display screen, gear adjusting rod and gear disc, one end of the gear adjusting rod is connected with the knob, the other end is used to trigger gear switch, the display screen is set on the surface of the knob, for showing the gear information of the gear switch, the gear adjusting rod is transmission connection with the gear disc, so that the gear disc is switched between different gear positions, and different gear positions correspond to different pen point thickness.The utility model provides a kind of pen point thickness adjusting mechanism with gear display, by integrating gear display on the display screen of knob surface, and combining internal structure to realize accurate adjustment and intelligent prompt to pen point thickness, improve the use convenience and sense of technology of product.

Description

Technical Field

[0001] This utility model relates to the field of pencil sharpener technology, and more specifically, to a pencil tip thickness adjustment mechanism with a gear display and a pencil sharpener. Background Technology

[0002] Automatic pencil sharpeners, as common stationery tools, are widely used in schools, offices, and art studios. Existing automatic pencil sharpeners typically adjust the pencil tip thickness by moving a stop block downwards. When the stop block reaches the preset thickness position, the sharpener automatically retracts the pencil to ensure automation and convenience. Most existing pencil sharpeners have multiple thickness settings, which users select and identify using markings on the device. However, this traditional method of indicating settings is not intuitive and offers a mediocre user experience, failing to meet the needs of advanced users for precise adjustment and intelligent display. Therefore, there is an urgent need for an innovative solution that integrates the thickness setting display onto a knob-based surface display to enhance the user experience and increase product value. Summary of the Invention

[0003] To address the technical problems of unintuitive adjustment of pen tip thickness and poor user experience in existing automatic pencil sharpeners, this invention provides a pen tip thickness adjustment mechanism with a speed indicator. By integrating the speed indicator onto the display screen on the knob surface and combining it with the internal structure, it achieves precise adjustment and intelligent prompts for pen tip thickness, thereby improving the product's ease of use and technological appeal.

[0004] This utility model also proposes a pencil sharpener with the above-mentioned pencil tip thickness adjustment mechanism.

[0005] The technical solution adopted by this utility model is as follows: a pen tip thickness adjustment mechanism with a gear display is provided, including a knob, a display screen, a gear adjustment lever, and a gear dial. One end of the gear adjustment lever is connected to the knob, and the other end is used to trigger a gear switch. The display screen is disposed on the surface of the knob and is used to display the gear information of the gear switch. The gear adjustment lever is drivenly connected to the gear dial, so that the gear dial switches between different gear positions, and different gear positions correspond to different pen tip thicknesses.

[0006] With the above structure, users can adjust the desired nib thickness by rotating the knob. The system will automatically display the current setting information on the display screen on the knob surface, making the operation intuitive and providing clear feedback. This technical solution effectively solves the problems of existing pencil sharpening mechanisms, such as reliance on body markings for setting indication, difficulty in identification, and low setting accuracy. It offers the advantages of a compact structure, intelligent operation, and an excellent user experience.

[0007] According to one embodiment of this utility model, it further includes a pencil holder, a delay trigger rod, and a delay switch. The delay switch is disposed at the lower end of the delay trigger rod, which abuts against the gear shift dial. The delay trigger rod is activated when the gear shift dial is switched to a preset position to control the delayed start or stop of the pencil sharpening action of the pencil holder. The delayed sharpening mechanism is used to continue sharpening at a preset position until the pencil tip is smooth after the pencil has been cut to a preset length.

[0008] According to one embodiment of the present invention, a circuit board is also included. The circuit board is electrically connected to the delay switch, the gear switch and the display screen respectively, and is used to receive the signal from the gear switch and control the display screen to display the corresponding gear information, thereby realizing visual feedback of the gear position.

[0009] According to one embodiment of this utility model, the gear selector is provided with a pen-stopping part, and the delay switch abuts against the pen-stopping part so that the delay switch is triggered by the pen-stopping part when the gear selector is rotated to a preset position. This structure can effectively match the gear selector with the pen-sharpening thickness by triggering the delayed sharpening through the mechanical position of the pen-stopping part.

[0010] According to one embodiment of the present invention, the pen-blocking part includes a first step, a second step, and a third step arranged in sequence. The height of the three steps increases or decreases in a preset direction, so that the pen withdrawal time or cutting depth can be controlled in stages when sharpening the pen, thereby further optimizing the pen tip forming effect.

[0011] According to one embodiment of the present invention, a motor is also included, which is connected to the tool holder via a reduction gear set and is used to drive the tool holder to perform pen-sharpening operations.

[0012] According to one embodiment of the present invention, the gear shift dial is provided with a gear part, and the gear shift adjustment rod has a meshing part that meshes with the gear part, so that the gear shift dial is driven by the rotation of the knob to realize gear switching, thereby ensuring the reliability and response accuracy of gear shifting.

[0013] According to one embodiment of the present invention, the gear adjustment lever is provided with a signal triggering part for triggering the gear switch during gear adjustment.

[0014] According to one embodiment of the present invention, the outer periphery of the gear adjustment lever is provided with a plurality of gear slots corresponding to different gear positions, and the mechanism is also provided with a ball that can be elastically inserted into the gear slot. This structure can achieve clear gear positioning and knob operation damping feel, improving the user's control feel and positioning accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the pencil sharpener in the embodiment of this utility model.

[0017] Figure 2 This is a cross-sectional view of the pencil sharpener in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the pencil sharpener in an embodiment of the present invention.

[0019] Figure 4 This is a perspective view of the pen tip thickness adjustment mechanism in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the pen tip thickness adjustment mechanism in an embodiment of this utility model.

[0021] Figure 6 This is a cross-sectional view of the pen tip thickness adjustment mechanism in an embodiment of this utility model.

[0022] Figure 7 This is a structural diagram of the pen tip thickness adjustment mechanism in an embodiment of this utility model.

[0023] Figure 8 This is a cross-sectional schematic diagram of the pen tip thickness adjustment mechanism in an embodiment of this utility model.

[0024] Figure 9 This is a perspective view of the gear adjustment lever in an embodiment of this utility model.

[0025] Figure 10 This is a perspective view of the gear shift panel in an embodiment of this utility model.

[0026] Explanation of the labels in the diagram:

[0027] 1. Knob; 2. Gear adjustment lever; 3. Display screen; 4. Tool holder; 5. Mounting bracket; 6. Motor; 7. Reduction gear set; 8. Delay trigger lever; 9. Screen mounting bracket; 10. Circuit board; 11. Gear switch; 12. Gear dial; 13. Delay switch; 14. Particle ball; 15. Housing;

[0028] 121. Gear section; 122. Pen stop section; 123. Center hole;

[0029] 122a, First step; 122b, Second step; 122c, Third step;

[0030] 21. Limiting end; 22. Signal triggering part; 23. Engaging part; 24. Connecting part; 25. Gear slot;

[0031] 41. Pen block. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0033] like Figure 1-10 As shown in the figure, this embodiment discloses a pencil tip thickness adjustment mechanism with a gear display, including a knob 1, a display screen 3, a gear adjustment lever 2, and a gear dial 12. The knob 1 is located on the outside of the pencil sharpener housing 15 for manual rotation by the user. The display screen 3 is integrated on the outer surface of the knob 1 and is used to display the current gear information in real time when the user adjusts the knob 1. One end of the gear adjustment lever 2 is fixedly connected to the knob 1 and rotates synchronously with the knob 1. The other end is used to trigger the gear switch 11 located inside, which identifies the current gear status and transmits the signal to the display screen 3 for display. The gear adjustment lever 2 is connected to the gear dial 12 through its middle structure, so that the gear dial 12 switches to different gear positions during rotation. Different gear positions control different sharpening depths, thereby adjusting the output pencil tip thickness.

[0034] Furthermore, in this embodiment, a mounting bracket 5 is provided inside the pencil sharpener housing 15, and the gear adjustment lever 2, gear plate 12, and gear switch 11 are all mounted on the mounting bracket 5. Figure 2 As shown, the pencil sharpener includes a sharpening chamber for mounting the blade holder 4 and a mounting chamber for mounting the mounting bracket 5. The mounting chamber is separated from the sharpening chamber to prevent waste chips from entering and affecting the normal operation of the various components in the mounting chamber.

[0035] Furthermore, combined Figure 2-3As shown, the pencil tip thickness adjustment mechanism also includes a tool holder 4, a delay trigger rod 8, and a delay switch 13. The tool holder 4 is installed in the pencil sharpening cavity to support the cutting tool for processing the pencil tip. The delay trigger rod 8 is a vertically arranged movable rod with a pencil stop block 41 fixedly connected to its upper end and a delay switch 13 fixedly installed at its lower end. The trigger end of the delay switch is set downwards to contact the gear shift dial 12 for triggering. When the gear shift dial 12 is switched to the corresponding preset gear position, the pencil automatically advances until the pencil tip pushes the pencil stop block 41 downwards. The pencil stop block 41 drives the delay trigger rod 8 to move, causing the trigger end of the delay switch 13 to contact the gear shift dial 12. After the feedback signal is sent to the circuit board 10, the circuit board 10 controls the pencil advance to stop and keeps the tool holder 4 rotating to perform delayed pencil sharpening, also known as delayed sharpening. The delayed stopping of the pencil sharpening operation by the tool holder 4 allows for further fine polishing of the pencil tip, improving the uniformity and smoothness of the pencil tip formation.

[0036] Furthermore, this embodiment also includes a circuit board 10. The circuit board 10 is disposed inside the pencil sharpener housing 15 and fixed on the mounting bracket 5, serving as the control core of the entire machine. The circuit board 10 establishes electrical connections with the delay switch 13, the gear switch 11, and the display screen 3, respectively, to receive electrical signals from the gear switch 11 and the delay switch 13, and to determine the current gear status according to preset logic, thereby controlling the display screen 3 to display the corresponding gear number, icon, or light / dark indicator in real time, forming clear visual feedback.

[0037] Furthermore, combining Figure 6-8 As shown, to achieve coordinated control of mechanical action and electrical signal triggering, the gear shift dial 12 is provided with a pen stop part 122, and the delay switch 13 at the top of the delay trigger lever 8 directly abuts against the lower surface of the pen stop part 122. After the gear shift dial 12 is rotated to the target gear position, the pen stop part 122 at the corresponding position is pressed by the delay trigger lever 8, so that the delay switch 13 is in the open state to provide feedback delay signal.

[0038] Furthermore, combining Figure 10 As shown, the pen-stopping part 122 is composed of a first step 122a, a second step 122b, and a third step 122c, arranged in ascending or descending order of height. By setting steps of different heights, when the gear shift dial 12 rotates to different positions, the travel depth of the delayed trigger lever 8 is different, so that the sharpened pen tip has the expected taper and length in different gear positions.

[0039] Furthermore, combined Figure 4-5 The blade holder 4 is connected to the motor 6 via a reduction gear set 7. The motor 6 is mounted on the mounting bracket 5 and provides power for sharpening pencils. The reduction gear set 7 converts the high-speed rotational motion output by the motor 6 into a lower-speed but more torque-driven output, so as to drive the blade holder 4 to perform pencil sharpening operations stably and smoothly.

[0040] Furthermore, to ensure the positional accuracy and meshing stability of the gear shifting disc 12 during the shifting process, the gear shifting disc 12 is provided with a gear section 121, and the gear shifting lever 2 has a matching meshing section 23 in the middle. When the user rotates the knob 1, the knob 1 drives the gear shifting lever 2 to rotate, and the shifting lever drives the gear section 121 of the gear shifting disc 12 to rotate through the meshing section 23, so that the gear shifting disc 12 can switch between multiple gears in a clockwise or counterclockwise direction, and the precision gear transmission ensures that each gear stays stable and without slippage.

[0041] Furthermore, combined Figure 10 As shown, one end of the gear shift disk 12 has a gear portion 121, and the other end has a pen-stopping portion 122. The gear portion 121 is a bevel gear, and the meshing portion 23 on the adjusting rod is a matching bevel gear. The gear shift adjusting rod 2 is horizontally positioned, and the gear shift disk 12 is vertically positioned. The gear shift disk 12 has a central hole 123, through which it is rotatably connected to the mounting bracket 5. The outer end of the gear shift adjusting rod 2 has a connecting portion 24, which extends radially outward along the gear shift adjusting rod 2. The connecting portion 24 is used to connect with the knob 1 to prevent relative rotation between the gear shift adjusting rod 2 and the knob 1. The inner end has a cylindrical limiting end 21, the outer diameter of which is larger than the outer diameter of the gear shift adjusting rod 2. The limiting end 21 abuts against the limiting structure on the mounting bracket 5 to prevent axial movement of the gear shift adjusting rod 2.

[0042] Furthermore, the gear adjustment lever 2 is provided with a signal triggering part 22, which is used to accurately activate the gear switch 11 located inside the machine body during rotation. The signal triggering part 22 is a spiral surface that acts on the gear switch 11 through contact. Different contact positions of the signal triggering part 22 result in different information fed back to the circuit board 10 by the gear switch 11, thereby realizing accurate identification and switching of gear status.

[0043] Furthermore, to provide clear feedback on the gear position during rotation adjustment of the knob 1, the outer periphery of the gear adjustment lever 2 is provided with multiple gear slots 25, each corresponding to a specific gear position. Inside the mechanism, a spring-loaded ball bearing 14 is installed. Under elastic action, the ball bearing 14 can spring into the corresponding gear slot 25, thus generating a "click" positioning feel when the user adjusts the knob 1, enhancing the damping and precision of the operation, while preventing the knob 1 from sliding freely between non-set positions, thereby improving overall adjustment accuracy.

[0044] Furthermore, a screen mounting bracket 9 is fixedly installed on the housing 15, and a knob 1 is rotatably installed in the round hole of the screen mounting bracket 9.

[0045] like Figure 1-3As shown, another embodiment discloses a pencil sharpener, including a pencil tip thickness adjustment mechanism with a gear indicator as described in this embodiment.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pen tip thickness adjustment mechanism with a position indicator, characterized in that: The device includes a knob, a display screen, a gear adjustment lever, and a gear dial. One end of the gear adjustment lever is connected to the knob, and the other end is used to trigger a gear switch. The display screen is located on the surface of the knob and is used to display the gear position information of the gear switch. The gear adjustment lever is connected to the gear dial, allowing the gear dial to switch between different gear positions, with different gear positions corresponding to different pen tip thicknesses.

2. The pen tip thickness adjustment mechanism with position display according to claim 1, characterized in that: It also includes a tool holder, a delay trigger rod, and a delay switch. The delay switch is located at the lower end of the delay trigger rod. The delay trigger rod abuts against the gear shift dial and triggers the delay switch when the gear shift dial is switched to a preset position, so as to control the tool holder's sharpening action to start or stop with a delay.

3. The pen tip thickness adjustment mechanism with position display according to claim 2, characterized in that: It also includes a circuit board, which is electrically connected to the delay switch, the gear switch and the display screen respectively, and is used to receive the signal from the gear switch and control the display screen to display the corresponding gear information.

4. The pen tip thickness adjustment mechanism with position display according to claim 3, characterized in that: The gear shift dial is provided with a pen-blocking part, and the delay switch is in contact with the pen-blocking part so that the delay switch is triggered by the pen-blocking part when the gear shift dial is rotated to a preset position.

5. A pen tip thickness adjustment mechanism with a position display according to claim 4, characterized in that: The pen-blocking part includes a first step, a second step, and a third step arranged in sequence, with the height of the three steps increasing or decreasing in a preset direction.

6. A pen tip thickness adjustment mechanism with a position display according to claim 2, characterized in that: It also includes a motor, which is connected to the tool holder via a reduction gear set and is used to drive the tool holder to perform pen-sharpening operations.

7. The pen tip thickness adjustment mechanism with position display according to claim 1, characterized in that: The gear shift dial is provided with a gear section, and the gear shift adjustment lever has a meshing part that meshes with the gear section, so that the gear shift dial can be driven by the rotation of the knob to achieve gear switching.

8. The pen tip thickness adjustment mechanism with position display according to claim 1, characterized in that: The gear adjustment lever is equipped with a signal triggering part, which is used to trigger the gear switch during gear adjustment.

9. A pen tip thickness adjustment mechanism with a position display according to claim 1, characterized in that: The gear adjustment lever has multiple gear slots on its outer periphery corresponding to different gear positions, and the mechanism also has a ball that can be elastically inserted into the gear slot.

10. A pencil sharpener, characterized in that: Includes the pen tip thickness adjustment mechanism with position display as described in any one of claims 1-9.

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