Double-end pen point grinding device

Abstract

The invention discloses a double-end pen point grinding device which comprises a motor and grinding devices, an output shaft of the motor protrudes out of the two sides of the motor to form a first shaft and a second shaft, the grinding devices are arranged on the first shaft and the second shaft respectively, each grinding device comprises a grinding hole, exposed grinding blocks are arranged on the inner walls of the grinding holes, pen points are inserted into the grinding holes, and the grinding blocks are arranged on the inner walls of the grinding holes. The motor drives the grinding device to rotate, the grinding block in the grinding device and the pen point of the pen point rub each other to grind the pen point, and the pen point grinding device has the advantages that the pen point is not prone to breakage in the grinding process, the use range is wide, and the service life can be prolonged by arranging the two grinding devices.

Description

Technical Field

[0001] The invention relates to the field of pencil sharpeners, in particular to a double-headed pen tip grinding device. Background Art

[0002] Pencils are widely used as a convenient and efficient writing tool in daily learning, office work, and artistic creation. However, there is a significant pain point during their use: as writing increases, the nib gradually becomes thicker due to wear, resulting in a decrease in line precision and affecting the quality of writing or drawing. Therefore, the nib needs to be frequently sharpened.

[0003] In the prior art, a pencil sharpener is a main device for solving this problem, which uses a built-in cutting component to rotate and cut the pencil so that the tip of the pencil forms a sharp shape. However, traditional pencil sharpeners have exposed numerous drawbacks in practical applications. First, the pencil tip and the wooden outer casing of the pencil are cut simultaneously during the cutting process. Due to the significant hardness difference between the pencil tip (usually a graphite or clay mixture) and the wood material, and the difficulty in precisely controlling the cutting force, the pencil tip can easily break due to uneven force. This not only wastes the lead material but also requires re-cutting, reducing efficiency. Second, with the development of stationery technology, "eternal pens" have emerged on the market. Their tips are made of special alloys or metal materials. They rely on the friction between the metal and paper to leave a mark, eliminating the need for frequent lead replacement. However, the hardness of these tips is much higher than the wooden casing and graphite tip of traditional pencils. If traditional pencil sharpeners are used to trim them, the cutting component is insufficiently hard, making it impossible to complete the cutting process, and even damaging the sharpener, limiting the device's applicability. Third, traditional pencil sharpeners are typically equipped with only a single cutting mechanism, which consists of precision components such as blades and a transmission mechanism. After long-term use, this mechanism is prone to failure due to wear and seizure. If a single mechanism is damaged, the entire sharpener will cease to function properly, forcing users to replace it with a new one, resulting in a short service life and a waste of resources.

[0004] Furthermore, as users demand greater ease of use and durability in their stationery, the aforementioned drawbacks of traditional pencil sharpeners have become increasingly prominent, making them unable to meet diverse cutting needs. Consequently, developing a new type of pencil sharpener that prevents tip breakage, accommodates a variety of nib materials, and offers redundant cutting capabilities has become a pressing technical challenge in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a double-headed pen tip grinding device, which is not easy to break during the grinding process and has a wide range of uses. In addition, the configuration of two grinding devices can extend the service life.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a double-headed pen tip grinding device, characterized in that: it includes a motor and a grinding device, the output shaft of the motor protrudes from both sides of the motor to form a first shaft and a second shaft, the first shaft and the second shaft are both provided with the above-mentioned grinding device, the grinding device includes a grinding hole, and an exposed grinding block is provided on the inner wall of the grinding hole. The pen tip is inserted into the grinding hole, and the motor drives the grinding device to rotate, and the grinding block in the grinding device and the pen tip of the pen tip rub against each other to achieve grinding of the pen tip.

[0007] A further preferred embodiment of the present invention is that the main body of the grinding block is inserted into the inner wall of the grinding hole, and the grinding surface of the grinding block is exposed.

[0008] A further preferred embodiment of the present invention is that there are two grinding blocks, and the two grinding blocks form a V shape.

[0009] A further preferred embodiment of the present invention is that the side of the grinding device is provided with a pen shavings hole, the pen shavings hole is connected to the grinding hole, and the pen shavings formed in the grinding hole are discharged through the pen shavings hole.

[0010] A further preferred solution of the present invention is that the pencil shavings hole is composed of four inclined surfaces, and the four inclined surfaces are combined to form a pencil shavings hole that is open outward.

[0011] A further preferred embodiment of the present invention is that clearance grooves are provided on both sides of the grinding surface.

[0012] A further preferred embodiment of the present invention is that it also includes a battery, a housing and a control circuit. The control circuit and the battery are arranged in the housing. A control switch is provided on the housing. Pressing the control switch sends a signal to the control circuit, and the control circuit controls the rotation or stop of the motor.

[0013] A further preferred solution of the present invention is that insertion holes are provided on both sides of the shell, the insertion holes are aligned with the grinding holes, and the insertion holes are covered with a movable cover.

[0014] A further preferred embodiment of the present invention is as follows: the cover body includes an upper cover and a guide bar, a connecting piece is provided between the upper cover and the guide bar, two first guide grooves are formed between the upper cover, the guide bar and the connecting piece, the two first guide blocks of the shell are inserted into the first guide grooves to realize the movement of the cover body, a raised positioning block is provided in the guide bar, and a positioning groove is provided on the inner wall of the first guide groove, and the cooperation between the positioning block and the positioning groove realizes the fixing of the cover body after it is opened.

[0015] A further preferred embodiment of the present invention is as follows: an ash discharge hole is provided on the shell, a grinding chamber is provided in the shell, a grinding device is provided in the grinding chamber, the grinding chamber, the ash discharge hole and the pen shavings hole are connected, a movable ash discharge cover is provided on the ash discharge hole, the pen shavings are discharged from the pen shavings hole into the grinding chamber, and the pen shavings in the grinding chamber are discharged through the ash discharge hole.

[0016] A further preferred solution of the present invention is: the ash outlet cover includes a lower cover and a second guide block, two second guide grooves are provided in the shell, both sides of the second guide block are inserted into the two second guide grooves, and the ash outlet cover moves along the second guide grooves.

[0017] The dual-end pen tip grinding device of the present invention utilizes grinding devices on the first and second shafts of the motor output shaft, creating a dual-station operation system. This design allows simultaneous grinding of two pens, significantly improving processing efficiency. If one grinding device fails, the other can be immediately replaced, eliminating the need to purchase a separate device and extending the device's service life. Furthermore, by utilizing a grinding block that rubs against the pen tip, grinding is less likely to break the pen tip than traditional cutting methods. It is compatible with a variety of pen tips, from traditional pencils to high-hardness permanent pens, avoiding the problem of easily broken pen tips caused by traditional cutting and broadening the device's applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Three-dimensional diagram of motor and grinding device Figure 1 ;

[0019] Figure 2 Three-dimensional diagram of motor and grinding device Figure 2 ;

[0020] Figure 3 Three-dimensional diagram of motor and grinding device Figure 3 ;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 The present invention is a three-dimensional Figure 1 ;

[0023] Figure 6 An exploded view of the present invention;

[0024] Figure 7 The present invention is a three-dimensional Figure 2 ;

[0025] Figure 8 is a three-dimensional diagram of the cover;

[0026] Figure 9 This is a three-dimensional diagram of the ash cover. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1-9As shown, a double-ended pen tip grinding device includes a motor 1 and a grinding device 2. The output shaft of the motor 1 protrudes from both sides of the motor 1 to form a first shaft 3 and a second shaft 4. The grinding device 2 is provided on both the first shaft 3 and the second shaft 4. The grinding device 2 includes a grinding hole 5. The inner wall of the grinding hole 5 is provided with an exposed grinding block 6. The pen tip is inserted into the grinding hole 5. The motor 1 drives the grinding device 2 to rotate. The grinding block 6 in the grinding device 2 and the pen tip of the pen tip rub against each other to grind the pen tip. The double-ended pen tip grinding device is provided with a grinding device 2 on the first shaft 3 and the second shaft 4 on both sides of the output shaft of the motor 1, creating a dual-station operation system. This design can grind two pens at the same time, greatly improving processing efficiency. In addition, when a problem occurs in one grinding device 2, the other device can immediately replace it, reducing the risk of equipment downtime and extending continuous working time. At the same time, the grinding block 6 is rubbed against the pen tip to adapt to a variety of pen tips such as traditional pencils and high-hardness eternal pens, avoiding the problem of traditional cutting that easily breaks the pen tip and broadening the scope of application of the equipment.

[0029] The main body of the grinding block 6 is inserted into the inner wall of the grinding hole 5, with the grinding surface 7 of the grinding block 6 exposed. This structure, in which the main body of the grinding block 6 is inserted into the inner wall of the grinding hole 5 and the grinding surface 7 is exposed, not only enhances the installation stability of the grinding block 6, preventing it from loosening and falling off during high-speed friction, thus ensuring the reliability of the grinding process, but also allows the grinding surface 7 to fully contact the pen tip, ensuring concentrated and uniform friction, improving the accuracy of the pen tip grinding, and making the pen tip shape more regular. At the same time, it reduces wear on the non-working part of the grinding block 6, extending its service life.

[0030] There are two grinding blocks 6, forming a V-shape. The V-shaped design of the two grinding blocks 6 can form a wrapping friction on the pen tip, so that all parts of the pen tip are evenly stressed, avoiding excessive wear or uneven stress on the pen tip that may cause nib skewness. This ensures that the shape of the pen tip after grinding is regular and the sharpness is consistent, improving the grinding quality. It is particularly suitable for scenes where high precision of the pen tip is required.

[0031] The grinding surface 7 is provided with clearance grooves 8 on both sides. The clearance grooves 8 are provided on both sides of the grinding surface 7 to accommodate some of the pencil shavings generated during the grinding process, preventing the pencil shavings from accumulating between the grinding surface 7 and the pen tip, avoiding the influence of the friction effect due to the obstruction of the pencil shavings, and at the same time providing a certain buffer space for the pen tip, reducing the risk of the pen tip being over-grinded, and further ensuring the stability of the grinding and the quality of the pen tip.

[0032] The side of the grinding device 2 is a shavings hole 9, which is connected to the grinding hole 5. The shavings formed in the grinding hole 5 are discharged through the shavings hole 9. The shavings hole 9 is composed of four inclined surfaces 10, which combine to form an outwardly open shavings hole 9. The shavings hole 9 on the side of the grinding device 2 is connected to the grinding hole 5, and the four inclined surfaces 10 are combined to form an outwardly open structure. This not only achieves the timely discharge of shavings and prevents them from accumulating in the grinding hole 5 and hindering grinding, but also speeds up the shavings removal speed through the guiding effect of the inclined surfaces 10. The outwardly open design increases the entrance of the shavings removal channel, ensuring that shavings of different sizes can pass smoothly, maintaining the cleanliness of the grinding hole 5, and ensuring grinding efficiency.

[0033] It also includes a battery 11, a housing 12 and a control circuit. The control circuit and the battery 11 are arranged in the housing 12. A control switch 14 is provided on the housing 12. Pressing the control switch 14 sends a signal to the control circuit, and the control circuit controls the rotation or stop of the motor 1. The configuration of the battery 11, the housing 12 and the control circuit frees the device from the constraints of an external power supply, realizes a portable design, and is convenient for flexible use in various scenarios. The control switch 14 on the housing 12 controls the start and stop of the motor 1 by pressing a signal. The operation is simple and intuitive. The user can control it at any time according to needs, avoiding the idling of the motor 1 and wasting energy. At the same time, it reduces the risk of misoperation and improves the safety of use.

[0034] Insertion holes 15 are provided on both sides of the housing 12, aligned with the grinding hole 5. These holes are covered with removable covers 16. These alignments provide precise guidance for pen tip insertion, allowing users to quickly align the pen tip with the grinding hole 5, simplifying operation and enhancing ease of use. The removable covers 16 seal the insertion holes 15 when the device is idle, effectively preventing dust and debris from entering. This protects components such as the grinding block 6 and motor 1, extending the device's service life while maintaining a clean appearance.

[0035] The cover 16 includes an upper cover 17 and a guide bar 18. A connector 19 is disposed between the upper cover 17 and the guide bar 18. Two first guide slots 20 are formed between the upper cover 17, the guide bar 18, and the connector 19. Two first guide blocks 21 of the housing 12 are inserted into the first guide slots 20 to enable movement of the cover 16. A raised positioning block 22 is provided in the guide bar 18, and a positioning slot 23 is provided on the inner wall of the first guide slot 20. The positioning block 22 and the positioning slot 23 cooperate to secure the cover 16 after it is opened. The movement of the cover 16 through the first guide slots 20 and the first guide blocks 21 of the housing 12 ensures smooth opening and closing of the cover 16, avoiding any jamming. The positioning block 22 of the guide bar 18 cooperates with the positioning slot 23 on the inner wall of the first guide slot 20 to secure the cover 16 securely after it is opened, preventing vibration from causing the cover 16 to close automatically during use. This ensures that the insertion hole 15 remains open, without affecting the continuity of the pen tip insertion and grinding operation.

[0036] The housing 12 is provided with an ash discharge hole 24, and a grinding chamber 25 is provided inside the housing 12. The grinding device 2 is provided in the grinding chamber 25. The grinding chamber 25, the ash discharge hole 24, and the pen dust hole 9 are connected. A removable ash discharge cover 26 is provided on the ash discharge hole 24. Pen dust is discharged from the pen dust hole 9 into the grinding chamber 25, and the pen dust in the grinding chamber 25 is discharged through the ash discharge hole 24. The ash discharge hole 24 on the housing 12 is connected with the grinding chamber 25 and the pen dust hole 9, forming an orderly chip discharge path of "pen dust hole 9 → grinding chamber 25 → ash discharge hole 24". The pen dust is first temporarily stored in the grinding chamber 25 and then discharged centrally through the ash discharge hole 24, realizing the centralized collection and treatment of the pen dust and avoiding environmental pollution caused by the direct scattering of pen dust. The removable ash discharge cover 26 closes the ash discharge hole 24 in the non-chip discharge state to prevent the leakage of pen dust. The user can clean it at a convenient time, which improves the cleanliness and convenience of use.

[0037] The ash cover 26 includes a lower cover 27 and a second guide block 28. Two second guide slots 29 are provided within the housing 12. The two side edges of the second guide block 28 are inserted into the two second guide slots 29, and the ash cover 26 moves along the second guide slots 29. The second guide block 28 of the ash cover 26 is inserted into the second guide slots 29 of the housing 12 and moves along them, ensuring stable and reliable opening and closing of the ash cover 26 and labor-saving operation. At the same time, this matching method ensures that the ash cover 26 is precisely docked with the ash outlet hole 24. When closed, it can effectively seal to prevent pencil shavings from leaking. When opened, the ash outlet hole 24 can be fully opened to ensure smooth discharge of pencil shavings, further optimizing the convenience and sealing of pencil shavings cleaning.

[0038] The above describes in detail the dual-ended pen tip grinding device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A double-ended pen tip grinding device, characterized by: The utility model comprises a motor and a grinding device, wherein the output shaft of the motor protrudes from both sides of the motor to form a first shaft and a second shaft, and the grinding device is provided on the first shaft and the second shaft. The grinding device comprises a grinding hole, and an exposed grinding block is provided on the inner wall of the grinding hole. The pen tip is inserted into the grinding hole, and the motor drives the grinding device to rotate. The grinding block in the grinding device and the pen tip of the pen tip rub against each other to grind the pen tip.

2. A double-ended pen tip grinding device according to claim 1, characterized in that The main body of the grinding block is inserted into the inner wall of the grinding hole, and the grinding surface of the grinding block is exposed.

3. A double-ended pen tip grinding device according to claim 1, characterized in that There are two grinding blocks, which form a V shape.

4. A double-ended pen tip grinding device according to claim 2, characterized in that Both sides of the grinding surface are provided with clearance grooves.

5. A double-ended pen tip grinding device according to claim 1, characterized in that The side of the grinding device is a shavings hole, which is connected to the grinding hole. The shavings formed in the grinding hole are discharged through the shavings hole. The shavings hole is composed of four inclined surfaces, which form an outwardly open shavings hole.

6. A double-ended pen tip grinding device according to claim 1, characterized in that It also includes a battery, a shell and a control circuit. The control circuit and the battery are arranged in the shell. A control switch is arranged on the shell. Pressing the control switch sends a signal to the control circuit, and the control circuit controls the rotation or stop of the motor.

7. A double-ended pen tip grinding device according to claim 6, characterized in that Insertion holes are arranged on both sides of the shell, the insertion holes are aligned with the grinding holes, and the insertion holes are covered with a movable cover.

8. A double-ended pen tip grinding device according to claim 7, characterized in that The cover body includes an upper cover and a guide bar, a connecting piece is provided between the upper cover and the guide bar, two first guide grooves are formed between the upper cover, the guide bar and the connecting piece, the two first guide blocks of the shell are inserted into the first guide grooves to realize the movement of the cover body, a raised positioning block is provided in the guide bar, and a positioning groove is provided on the inner wall of the first guide groove. The positioning block and the positioning groove cooperate to fix the cover body after it is opened.

9. A double-ended pen tip grinding device according to claim 6, characterized in that The shell is provided with an ash discharge hole, a grinding cavity is provided in the shell, the grinding device is provided in the grinding cavity, the grinding cavity, the ash discharge hole and the pen shavings hole are connected, a movable ash discharge cover is provided on the ash discharge hole, the pen shavings are discharged from the pen shavings hole into the grinding cavity, and the pen shavings in the grinding cavity are discharged through the ash discharge hole.

10. A double-ended pen tip grinding device according to claim 9, characterized in that The ash outlet cover includes a lower cover and a second guide block. Two second guide grooves are provided in the shell. Both sides of the second guide block are inserted into the two second guide grooves, and the ash outlet cover moves along the second guide grooves.

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