Pencil sharpener with gear display

Abstract

The pencil sharpener comprises a shell, a rotary knob, a display screen, a gear adjusting rod and a gear disc, one end of the gear adjusting rod is connected with the rotary knob, the other end of the gear adjusting rod is used for triggering a gear switch, the display screen is arranged on the surface of the rotary knob and used for displaying gear information of the gear switch, and the gear disc is used for displaying the gear information of the gear switch. The gear adjusting rod is in transmission connection with the gear disc, so that the gear disc is switched between different gear positions, and the different gear positions correspond to different pen points in thickness. According to the pencil sharpener with the gear display function, the gear display function is integrated on the display screen on the surface of the rotary knob, accurate adjustment and intelligent prompting of the thickness of a pencil point are achieved in combination with an internal structure, and the use convenience and the science and technology feeling of a product are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pencil sharpeners, and more particularly to a pencil sharpener with a gear position display. Background Art

[0002] Automatic pencil sharpeners are a common stationery tool used in schools, offices, and painting settings. Existing automatic pencil sharpeners typically adjust the tip thickness by adjusting the pen tip, which in turn drives the stylus block downward. When the stylus block moves down to a preset thickness, the sharpener automatically retracts the pencil, ensuring an automated and convenient sharpening process. Most existing pencil sharpeners feature multiple thickness settings, with markings on the sharpener indicating the user's preference.

[0003] However, this traditional gear indication method has problems such as lack of intuitive recognition and mediocre operating experience, which makes it difficult to meet the needs of high-end users for precise adjustment and intelligent display.

[0004] Therefore, there is an urgent need for an innovative solution that can integrate the coarse and fine gear display on the display screen on the knob surface to enhance user experience and product added value. Summary of the Invention

[0005] In order to solve the technical problems of non-intuitive gear adjustment and poor user experience in existing automatic pencil sharpeners, the present invention provides a pencil sharpener with a gear display. By integrating the gear display on the surface of the knob and combining it with the internal structure, precise adjustment of the thickness of the pen tip and intelligent prompts can be achieved, thereby improving the product's convenience and sense of technology.

[0006] The technical solution adopted by the present invention is: to provide a pencil sharpener with a gear display, including a shell, 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 the gear switch, the display screen is arranged on the surface of the knob, and is used to display the gear information of the gear switch, the gear adjustment lever is transmission-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.

[0007] With this structure, users can adjust the desired pen tip thickness by rotating the knob, and the system automatically displays the current gear position on the display screen on the knob surface, making operation intuitive and providing clear feedback. This technical solution effectively solves the problems of existing pencil sharpeners, such as gear position indication relying on body markings, difficulty in identification, and low gear position accuracy. It has the beneficial effects of compact structure, intelligent operation, and excellent user experience.

[0008] According to one embodiment of the present invention, the device further includes a tool holder, a time-delay trigger lever, and a time-delay switch. The time-delay switch is disposed at the lower end of the time-delay trigger lever. The time-delay trigger lever contacts the shift dial and triggers the time-delay switch when the shift dial is switched to a preset position, thereby controlling the delayed start or stop of the tool holder's pencil sharpening action. The time-delay pencil sharpening mechanism is used to continue sharpening a pencil at a preset length until the tip is polished to a smooth surface.

[0009] According to one embodiment of the present invention, a circuit board is further included, which is electrically connected to the delay switch, the gear switch and the display screen respectively, and is used to receive the signal of the gear switch and control the display screen to display the corresponding gear information, thereby realizing visual feedback of the gear.

[0010] According to one embodiment of the present invention, the shift dial is provided with a pen stop, and the delay switch contacts the pen stop so that the delay switch is triggered by the pen stop when the shift dial is rotated to a preset position. This structure can trigger the delayed sharpening by the mechanical position of the pen stop, effectively matching the shift position with the thickness of the sharpening pen.

[0011] According to one embodiment of the present invention, the pen-blocking portion includes a first step, a second step, and a third step arranged in sequence, and the heights of the three steps increase or decrease in a preset direction, so that the pen retraction time or the cutting depth during pen sharpening can be controlled in stages, further optimizing the pen tip molding effect.

[0012] According to one embodiment of the present invention, a motor is further included, and the motor is connected to the tool holder through a reduction gear set, and is used to drive the tool holder to perform a pencil sharpening operation.

[0013] According to one embodiment of the present invention, the gear plate is provided with a gear portion, and the gear adjustment lever has an engaging portion engaged with the gear portion, so that the gear plate is driven by the rotation of the knob to achieve gear switching, thereby ensuring the reliability and response accuracy of the gear conversion.

[0014] According to one embodiment of the present invention, the gear adjustment lever is provided with a signal triggering portion for triggering the gear switch during the gear adjustment process.

[0015] According to one embodiment of the present invention, a plurality of gear slots corresponding to different gear positions are provided on the periphery of the gear adjustment lever, and a ball that can be elastically inserted into the gear slot is further provided in the mechanism. This structure can achieve clear gear positioning and knob operation damping feeling, thereby improving the user's control feel and positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 2 is a perspective view of a pencil sharpener according to an embodiment of the present invention.

[0018] Figure 2 2 is a cross-sectional view of a pencil sharpener according to an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of a pencil sharpener in an embodiment of the present invention.

[0020] Figure 4 2 is a perspective view of a pencil sharpener according to an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the structure of a pencil sharpener in an embodiment of the present invention.

[0022] Figure 6 2 is a cross-sectional view of a pencil sharpener according to an embodiment of the present invention.

[0023] Figure 7 1 is a structural diagram of a pencil sharpener in an embodiment of the present invention.

[0024] Figure 8 Schematic cross-sectional view of a pencil sharpener according to an embodiment of the present invention.

[0025] Figure 9 3D is a perspective view of a gear adjustment lever in an embodiment of the present invention.

[0026] Figure 10 3D is a perspective view of a gear shift plate in an embodiment of the present invention.

[0027] Description of the numbers in the figure: 1. Knob; 2. Shift lever; 3. Display screen; 4. Tool holder; 5. Mounting bracket; 6. Motor; 7. Reduction gear set; 8. Time-delay trigger lever; 9. Screen mounting bracket; 10. Circuit board; 11. Shift switch; 12. Shift plate; 13. Time-delay switch; 14. Beads; 15. Housing; 121. Gear portion; 122. Pen stop portion; 123. Center hole; 122a, first step; 122b, second step; 122c, third step; 21. Limit end; 22. Signal triggering part; 23. Engaging part; 24. Connecting part; 25. Shift slot; 41. Pen block. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. Example 1

[0029] like Figure 1-10 As shown, in this embodiment, a pencil sharpener with a gear display is disclosed, including a housing 15, a knob 1, a display screen 3, a gear adjustment lever 2 and a gear disk 12. The knob 1 is arranged on the outside of the pencil sharpener housing 15 for manual rotation operation 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 rotation of the knob 1, and the other end is used to trigger the gear switch 11 provided inside, which is used to identify the current gear state and transmit the signal to the display screen 3 for display. The gear adjustment lever 2 is connected to the gear disk 12 through its central structure, so that the gear disk 12 switches to different gear positions during the rotation process. Different gear positions control different pencil sharpening depths, thereby adjusting the output pen tip thickness.

[0030] Furthermore, in this embodiment, a mounting frame 5 is provided inside the pencil sharpener housing 15, and the gear adjustment lever 2, the gear plate 12 and the gear switch 11 are all provided on the mounting frame 5. Figure 2 As shown, the interior of the pencil sharpener includes a pencil sharpening chamber for installing a tool holder 4 and an installation chamber for installing a mounting frame 5. The installation chamber is separated from the pencil sharpening chamber to prevent waste chips from entering and affecting the normal operation of various components in the installation chamber.

[0031] Further, combined with Figure 2-3 As shown, the pencil sharpener 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 to realize the processing of the pen tip. The delay trigger rod 8 is a vertically arranged movable rod, the upper end of which is fixedly connected to the pencil blocking block 41, and the lower end is fixedly installed with the delay switch 13. The trigger end of the delay switch is set downward and is used to contact and trigger with the gear plate 12. When the gear plate 12 is switched to the corresponding preset gear position, the pencil automatically advances until the pencil tip pushes the pencil blocking block 41 downward, and the pencil blocking block 41 drives the delay trigger rod 8 to move, so that the trigger end of the delay switch 13 contacts the gear plate 12 and feedbacks the signal to the circuit board 10. The circuit board 10 controls to stop the pen feeding and keeps the tool holder 4 rotating to perform the delayed pencil sharpening operation, which is also called the delayed pencil sharpening operation. The delayed stop of the pencil sharpening operation by the tool holder 4 can further fine-tune the pencil tip and improve the uniformity and smoothness of the pencil tip molding.

[0032] Furthermore, this embodiment includes a circuit board 10. This circuit board 10 is located within the pencil sharpener housing 15 and secured to the mounting bracket 5, serving as the control core of the entire device. The circuit board 10 is electrically connected to the time delay switch 13, the gear switch 11, and the display screen 3. The circuit board 10 receives electrical signals from the gear switch 11 and the time delay switch 13, determines the current gear state based on preset logic, and controls the display screen 3 to display the corresponding gear number, icon, or light / dark indicator in real time, providing clear visual feedback.

[0033] Furthermore, combined Figure 6-8 As shown, to achieve coordinated control of mechanical action and electrical signal triggering, the shift dial 12 is provided with a resistance portion 122. The delay switch 13 at the top of the delay trigger lever 8 directly abuts the lower surface of the resistance portion 122. After the shift dial 12 is rotated to the target gear position, the delay trigger lever 8 presses the resistance portion 122 at the corresponding position on the shift dial 12, causing the delay switch 13 to enter the on state and feedback the delay signal.

[0034] Furthermore, combined Figure 10 As shown, the pen stop 122 is composed of a first step 122a, a second step 122b, and a third step 122c, arranged in ascending or descending order in height. By providing steps of varying heights, the delay trigger rod 8 travels to varying depths when the shift dial 12 is rotated to the respective step positions, resulting in a desired taper and length for the sharpened pen tip at each shift position.

[0035] Further, combined with 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 frame 5 and is used to provide power for sharpening the pencil. The reduction gear set 7 converts the high-speed rotational motion of the motor 6 into a lower-speed, but more torque-rich output, driving the blade holder 4 stably and smoothly for the pencil sharpening operation.

[0036] Furthermore, to ensure positional accuracy and meshing stability during the shifting process of the shift dial 12, a gear portion 121 is provided on the shift dial 12, and a matching meshing portion 23 is provided in the middle of the shift adjustment lever 2. When the user rotates the knob 1, the knob 1 drives the shift adjustment lever 2 to rotate, which in turn drives the gear portion 121 of the shift dial 12 via the meshing portion 23, allowing the shift dial 12 to switch between multiple gears in a clockwise or counterclockwise direction. The precision gear transmission ensures that each gear remains stable and slip-free.

[0037] Further, combined with Figure 10As shown, one of the two axial ends of the gear plate 12 is provided with a gear portion 121, and the other end is provided with a pen-blocking portion 122. The gear portion 121 is a bevel gear, and the meshing portion 23 on the adjusting rod is a bevel gear that matches it. The gear adjusting rod 2 is arranged horizontally, and the gear plate 12 is arranged vertically. The gear plate 12 is provided with a center hole 123, and is rotatably connected to the mounting bracket 5 through the center hole 123. The outer end of the gear adjusting rod 2 is provided with a connecting portion 24, and the connecting portion 24 is formed by extending radially outward along the gear adjusting rod 2. The connecting portion 24 is used to connect with the knob 1 to prevent the gear adjusting rod 2 and the knob 1 from rotating relative to each other. The inner end has a cylindrical limiting end 21, and the outer diameter of the limiting end 21 is larger than the outer diameter of the gear adjusting rod 2. The limiting end 21 abuts against the limiting structure on the mounting bracket 5 to prevent the gear adjusting rod 2 from moving axially.

[0038] Furthermore, the gear adjustment lever 2 is provided with a signal trigger portion 22, which is used to accurately activate the gear switch 11 located inside the body during rotation. The signal trigger portion 22 is a spiral surface that acts on the gear switch 11 through contact. Depending on the contact position of the signal trigger portion 22, the gear switch 11 feeds back different information to the circuit board 10, thereby achieving accurate identification and conversion of the gear state.

[0039] Furthermore, to ensure clear feedback during the 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. A resiliently mounted ball 14 is installed within the mechanism. Under the elastic action of the ball 14, it springs into the corresponding gear slot 25, creating a "click" feeling when the user adjusts the knob 1, enhancing the damping and precision of the operation. It also prevents the knob 1 from sliding freely between non-set positions, improving overall adjustment accuracy.

[0040] Furthermore, a screen fixing seat 9 is fixedly mounted on the housing 15 , and the knob 1 is rotatably mounted in a circular hole of the screen fixing seat 9 .

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pencil sharpener with a gear position display, characterized in that: It includes a shell, 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 the gear switch. The display screen is set on the surface of the knob to display the gear information of the gear switch. The gear adjustment lever is transmission-connected to the gear dial so that the gear dial switches between different gear positions. Different gear positions correspond to different pen tip thicknesses.

2. A pencil sharpener with a gear 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 arranged at the lower end of the delay trigger rod. The delay trigger rod is in contact with the gear dial and triggers the delay switch when the gear dial is switched to a preset position to control the delayed start or stop of the pencil sharpening action of the tool holder.

3. A pencil sharpener with a gear 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 of the gear switch and control the display screen to display the corresponding gear information.

4. A pencil sharpener with a gear position display according to claim 3, characterized in that: The shift plate is provided with a pen-blocking portion, and the delay switch contacts the pen-blocking portion so that the delay switch is triggered by the pen-blocking portion when the shift plate rotates to a preset position.

5. The pencil sharpener with gear position display according to claim 4, characterized in that: The pen-blocking portion includes a first step, a second step and a third step which are arranged in sequence.

6. The pencil sharpener with a gear position display according to claim 2, characterized in that: It also includes a motor, which is connected to the tool holder through a reduction gear set and is used to drive the tool holder to perform a pencil sharpening operation.

7. The pencil sharpener with gear position display according to claim 1, characterized in that: The gear plate is provided with a gear portion, and the gear adjustment lever has an engaging portion engaged with the gear portion, so that the gear plate is driven to achieve gear switching through the rotation of the knob.

8. The pencil sharpener with a gear position display according to claim 1, characterized in that: The gear adjustment lever is provided with a signal triggering portion for triggering the gear switch during the gear adjustment process.

9. The pencil sharpener with a gear position display according to claim 1, characterized in that: 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 further provided with a ball that can be elastically snapped into the gear slots.

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