A fully automatic electric pencil sharpener and a control method thereof

Abstract

The application discloses a control device of a full-automatic electric pencil sharpener, which can control a pencil feeding driver in addition to a pencil sharpening driver, so that the pencil feeding and the pencil sharpening are controlled separately. A pencil tip adjusting switch is arranged in a hobbing assembly and is electrically connected with the control device. In use, when the pencil is cut and before the pencil is polished, the pencil tip of the hobbing assembly can trigger the pencil tip adjusting switch assembly to send a signal to the control device, and the control device controls the pencil feeding mechanism to stop feeding the pencil. Therefore, the phenomenon of broken core during the polishing of the pencil can be effectively avoided, and the pencil sharpening effect of the electric pencil sharpener is improved.

Description

Technical Field

[0001] This invention relates to the field of pencil sharpener technology, and more specifically to a fully automatic electric pencil sharpener and its control method. Background Technology

[0002] In my country, lower-grade students generally use pencils, which naturally require pencil sharpeners. Currently, manual mechanical pencil sharpeners are widely used in China due to their lower price. However, manual mechanical sharpeners require manual operation, making them inconvenient to use. To improve convenience, many electric pencil sharpeners have emerged on the market. Electric pencil sharpeners use a motor to complete the sharpening process, but they still have the following drawbacks: The drive control components of current electric pencil sharpeners only control the forward and reverse rotation of the sharpening motor, as well as the pencil feeding and retraction functions. However, after sharpening, the sharpening motor continues to run for a period of time to polish the pencil surface, making it smooth and improving the user's grip. But often during this sharpening process, because the feeding mechanism rotates forward, constantly controlling the pencil's downward movement, the lead often breaks, affecting the sharpening effect. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fully automatic electric pencil sharpener that can avoid the phenomenon of lead breakage during the sharpening process and improve the sharpening effect of the electric pencil sharpener.

[0004] The technical solution of this invention is to provide a fully automatic electric pencil sharpener with the following structure: a housing, within which a pencil sharpening mechanism, a pencil feeding mechanism, and a control device are installed; the pencil sharpening mechanism includes a roller blade assembly, a pencil sharpening driver, and a pencil sharpening transmission assembly, the pencil sharpening driver being connected to the roller blade assembly via the pencil sharpening transmission assembly, and the pencil sharpening driver being electrically connected to the control device; the pencil feeding mechanism includes a pencil feeding assembly, a pencil feeding driver, and a pencil feeding transmission assembly, the pencil feeding driver being connected to the pencil feeding assembly via the pencil feeding transmission assembly, and the pencil feeding driver being electrically connected to the control device; it also includes a pencil tip adjustment switch assembly, the pencil tip adjustment switch being disposed within the roller blade assembly, and the pencil tip adjustment switch assembly being electrically connected to the control device; when the pencil is finished being cut and before sharpening, the pencil tip within the roller blade assembly can trigger the pencil tip adjustment switch assembly to send a signal to the control device, and the control device controls the pencil feeding mechanism to stop feeding the pencil.

[0005] With the above structure, the fully automatic electric pencil sharpener of the present invention has the following advantages compared with the prior art:

[0006] Because the control device of the fully automatic electric pencil sharpener of this invention can control both the pencil sharpening driver and the pencil feeding driver, the pencil feeding and sharpening processes can be controlled separately. A pencil tip adjustment switch is installed within the roller assembly, and this switch is electrically connected to the control device. During use, when the pencil is finished cutting but before sharpening, the pencil tip within the roller assembly triggers the pencil tip adjustment switch assembly to send a signal to the control device, which then controls the pencil feeding mechanism to stop feeding. This effectively prevents lead breakage during pencil sharpening and improves the sharpening effect of the electric pencil sharpener.

[0007] As an improvement, the pen feeding transmission assembly includes a pen feeding drive gear, a transmission rod, and a transition wheel. The pen feeding drive gear is mounted on the drive end of the pen feeding driver. The transmission rod is rotatably connected within the housing, and its two ends are respectively provided with a first gear and a second gear. The first gear meshes with the pen feeding drive gear. The transition wheel is rotatably connected to the pen feeding assembly. One side of the transition wheel meshes with the transmission wheel inside the pen feeding assembly, and the other side of the transition wheel meshes with the second gear of the transmission rod. With this structure, the pen feeding driver transmits power to the pen feeding assembly through the pen feeding drive gear, transmission rod, and transition wheel. The transmission structure is simple and easy to assemble.

[0008] As an improvement, the hobbing cutter assembly includes a hobbing cutter holder installed within the housing. A transmission rod is rotatably connected to the hobbing cutter holder, with its lower end and a first gear protruding from the lower end of the hobbing cutter holder. A second gear of the transmission rod protrudes from the upper end of the hobbing cutter holder. A pen-feeding assembly is installed at the upper end of the hobbing cutter holder. After the pen-feeding assembly is in place, the second gear meshes with the transition wheel. With this structure, the transmission rod is rotatably connected to the hobbing cutter holder, resulting in a simple structure and more stable transmission rod assembly.

[0009] As an improvement, the pencil tip adjustment switch assembly includes an adjustment switch and a drive rod; both the adjustment switch and the drive rod are housed within the housing, with one end of the drive rod extending into the lower end of the pencil channel of the rotary cutter assembly, and the other end connected to the adjustment switch; when the pencil is finished cutting and before sharpening, the pencil tip pushes the drive rod to press the button of the adjustment switch. With this structure, the adjustment switch is controlled by pushing the drive rod, resulting in a simple structure, convenient assembly, and relatively easy electrical connection.

[0010] As an improvement, a base is provided inside the bottom of the housing, and the base has a support platform; the pencil sharpening transmission assembly is mounted on the upper side of the support platform, and the hobbing cutter holder is mounted on the upper side of the pencil sharpening transmission assembly. With this structure, the design is simple, assembly is convenient, and mounting the pencil sharpening transmission assembly on the support platform results in a more stable and reliable installation structure.

[0011] As an improvement, the pen feed motor is housed within the base; the hobbing rod holder has a shaft hole, and the transmission rod is rotatably connected within the shaft hole; the support platform has a connecting hole, and the transmission rod is rotatably connected within the shaft hole, with the lower end of the transmission rod rotatably connected within the connecting hole; the first gear is located within the base; a limiting protrusion is provided on the side wall of the transmission rod, and the limiting protrusion limits the upper side of the support platform. With this structure, the hobbing rod holder installation is simple and stable.

[0012] As an improvement, the adjustment switch is located inside the base; the support platform has a first through hole in the middle, and the pencil sharpening transmission assembly has a second through hole in the middle. The first and second through holes are aligned to form a slide rail, which is aligned with the pencil channel of the roller cutter assembly. The drive rod slides within the slide rail. With this structure, the drive rod installation is simple and the transmission effect is good.

[0013] As an improvement, the lower end of the drive rod is provided with a mounting groove, and the adjustment switch is fixedly connected in the mounting groove with the button of the adjustment switch facing downwards. The base is provided with an abutment; when the adjustment switch moves downwards, the button will abut against the abutment to trigger the adjustment switch to generate a signal. With this structure, the button of the adjustment switch is triggered by abutting against the abutment. Simply fixing the adjustment switch to the drive rod simplifies the connection structure between the adjustment switch and the drive rod, making assembly convenient.

[0014] As an improvement, the upper end of the roller cutter holder is provided with an embedding groove, and the lower end of the pen feed assembly is embedded in the embedding groove; the second gear extends into the embedding groove; and the transition wheel is installed on the side of the pen feed assembly. With this structure, the assembly between the pen feed assembly and the roller cutter holder is convenient, and the connection between the transition wheel and the second gear is also convenient.

[0015] As an improvement, the side wall of the pen feed assembly is provided with at least two locking blocks, and the inner wall of the insertion groove is provided with a sliding groove that matches the locking blocks. One end of the sliding groove has an opening on its upper side, and the height of the other end of the sliding groove matches the height of the locking blocks. The locking blocks can enter the sliding groove through the opening, and after rotating the pen feed assembly, the locking blocks can engage with the other end of the sliding groove. With this structure, the pen feed assembly and the roller cutter holder are connected through the locking blocks and slots, preventing the pen feed assembly from detaching from the roller cutter holder, resulting in a more stable connection.

[0016] Another technical problem to be solved by the present invention is to provide a control method for a fully automatic electric pencil sharpener, which can avoid the phenomenon of lead breakage during the sharpening process and improve the sharpening effect of the electric pencil sharpener.

[0017] The technical solution of the present invention is to provide a control method for a fully automatic electric pencil sharpener comprising the following steps:

[0018] S1. The pencil is inserted into the pencil feeding mechanism, and the pencil triggers the control device to work.

[0019] S2. The control device controls the pencil sharpening driver and the pencil feeding driver to work simultaneously. The pencil feeding assembly clamps the pencil and feeds it towards the roller cutter assembly. When the pencil enters the roller cutter assembly, the roller cutter assembly cuts the pencil tip.

[0020] S3. After the pencil is sharpened, the pencil tip triggers the tip adjustment switch assembly to send a signal to the control device, and then the control device controls the feeding mechanism to stop feeding;

[0021] S4. The roller cutter assembly continues to work, polishing the surface of the pencil tip;

[0022] S5. After polishing is completed, the control device controls the sharpening driver to stop working, and at the same time controls the pen feed driver to work in reverse to complete the pen retraction.

[0023] With the above structure, the control method of the fully automatic electric pencil sharpener of the present invention has the following advantages compared with the prior art:

[0024] In the control method of the fully automatic electric pencil sharpener of the present invention, the control device can control not only the pencil sharpening driver but also the pencil feeding driver, thus controlling the pencil feeding and sharpening separately. After sharpening is completed, the pencil tip triggers the tip adjustment switch assembly to send a signal to the control device, which then controls the pencil feeding mechanism to stop feeding. This effectively avoids lead breakage during pencil sharpening and improves the sharpening effect of the electric pencil sharpener. Attached Figure Description

[0025] Figure 1This is an exploded structural diagram of the fully automatic electric pencil sharpener of the present invention.

[0026] Figure 2 This is a partial three-dimensional structural diagram of the fully automatic electric pencil sharpener of the present invention.

[0027] Figure 3 This is a partial exploded structural diagram of the fully automatic electric pencil sharpener of the present invention.

[0028] Figure 4 This is a three-dimensional structural diagram of another part of the fully automatic electric pencil sharpener of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the pencil feed box of the fully automatic electric pencil sharpener of the present invention.

[0030] Figure 6 This is a schematic diagram of a partial assembly structure of the fully automatic electric pencil sharpener of the present invention.

[0031] The figure shows: 1. Housing, 2. Hob, 3. Hob holder, 301. Shaft hole, 302. Embedded groove, 303. Slide groove, 4. Gearbox, 5. Pen sharpening motor, 6. Base, 601. Support platform, 602. Support foot, 603. Connecting hole, 7. Connecting shaft, 8. Adjustment switch, 801. Button, 9. Drive rod, 901. Mounting groove, 10. Slide groove, 11. Abutting part, 12. Pen feed box, 13. Pen feed motor, 14. Pen feed drive gear, 15. Transmission rod, 1501. First gear, 1502. Second gear, 1503. Limiting ring, 16. Transition wheel. Implementation

[0032] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0033] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0034] It should also be understood that the terms “comprising,” “including,” “having,” and “containing”, when used in this specification, indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0035] like Figure 1As shown, this application discloses a fully automatic electric pencil sharpener, including a housing 1, in which a pencil sharpening mechanism, a pencil feeding mechanism, and a control device are installed.

[0036] like Figures 1 to 4 As shown, the pencil sharpening mechanism includes a roller cutter assembly 2, a pencil sharpening driver, and a pencil sharpening transmission assembly. The roller cutter assembly 2 includes a roller cutter 2 and a roller cutter holder 3. The pencil sharpening transmission assembly includes a gearbox 4, which contains multiple meshing transmission gears. The pencil sharpening driver is a pencil sharpening motor 5, which is electrically connected to the control device.

[0037] The housing 1 has a base 6 at its bottom. The base 6 includes a support platform 601 and multiple support legs 602. The upper ends of the support legs 602 are connected to the edge of the lower surface of the support platform 601 and are evenly arranged. The lower ends of the support legs 602 are fixedly connected to the bottom wall of the housing 1. The gearbox 4 is fixedly connected to the upper surface of the support platform 601. The lower end of the hobbing cutter holder 3 is fixedly connected to the upper surface of the gearbox 4. The hobbing cutter 2 is rotatably connected inside the hobbing cutter holder 3. The power output end of the gearbox 4 is a hollow connecting shaft 7, the upper end of which is exposed on the upper surface of the gearbox 4 and inserted into the lower end of the hobbing cutter 2. The pencil sharpening motor 5 is installed inside the base 6 and located below the support platform 601. The output end of the pencil sharpening motor 5 is connected to the power input end of the gearbox 4. When the pencil sharpening motor 5 is started, it drives the hobbing cutter 2 to rotate through the transmission of the gearbox 4.

[0038] The pen tip adjustment switch 8 assembly includes an adjustment switch 8 and a drive rod 9. The support platform 601 has a first through hole in its center, and the connecting shaft 7 of the gearbox 4 has a second through hole in its center. The first and second through holes are aligned to form a slide rail 10, which is aligned with the pencil channel of the roller cutter 2. The drive rod 9 is slidably engaged within the slide rail 10, with its upper end extending into the lower end of the pencil channel of the roller cutter 2 assembly. The adjustment switch 8 is installed within the base 6. The lower end of the drive rod 9 has a mounting groove 901, and the adjustment switch 8 is fixedly connected within the mounting groove 901 with its button 801 facing downwards. The base 6 has an abutment 11. When the adjustment switch 8 moves downwards, the button 801 abuts against the abutment 11 to trigger the adjustment switch 8 to generate a signal. In this specific embodiment, the contact member 11 is a knob rod connected to the adjustment knob, and the button 801 will abut against the outer surface of the knob rod.

[0039] like Figures 5 to 6 As shown, the pen feeding mechanism includes a pen feeding assembly, a pen feeding driver, and a pen feeding transmission assembly. The pen feeding assembly includes a pen feeding box 12, which is existing technology and will not be described in detail here. The pen feeding box 12 is equipped with a transmission wheel 1201. Through the transmission action of the transmission wheel 1201 and other transmission auxiliary components, the rubber roller assembly inside the pen feeding box 12 can rotate forward or backward to achieve the function of feeding or retracting the pen. The pen feeding driver is a pen feeding motor 13. The pen feeding transmission assembly includes a pen feeding drive gear 14, a transmission rod 15, and a transition wheel 16. The pen feeding drive gear 14 is electrically connected to the control device.

[0040] The pen feed motor 13 is housed within the base 6, and the pen feed drive gear 14 is mounted on the drive end of the pen feed driver. The transmission rod 15 has a first gear 1501 and a second gear 1502 at both ends. The hobbing cutter holder 3 has a shaft hole 301, and the support platform 601 has a connecting hole 603. The transmission rod 15 is rotatably connected within the shaft hole 301, and its lower end is rotatably connected within the connecting hole 603. The first gear 1501 is located within the base 6 and meshes with the pen feed drive gear 14. A limiting protrusion 1503 is provided on the side wall of the transmission rod 15, limiting the upper side of the support platform 601. The upper end of the hobbing cutter holder 3 has an embedding groove 302, and the lower end of the pen feed assembly is embedded within the embedding groove 302. The upper opening of the shaft hole 301 is located at the bottom of the mounting groove 901. The second gear 1502 extends into the embedding groove 302 through the opening at the upper end of the shaft hole 301, and the transition wheel 16 is mounted on the side of the pen feeding assembly. After the pen feeding assembly is installed in place, the second gear 1502 meshes with the transition wheel 16.

[0041] The pen feed box 12 has at least two locking blocks 1202 on its side wall, and the inner wall of the embedding groove 302 has a sliding groove 303 that matches the locking blocks 1202. One end of the sliding groove 303 has an opening on its upper side, and the height of the other end of the sliding groove 303 matches the height of the locking blocks 1202. The locking blocks 1202 can enter the sliding groove 303 through the opening. After rotating the pen feed assembly, the locking blocks 1202 can be engaged in the other end of the sliding groove 303.

[0042] This application also discloses a control method for a fully automatic electric pencil sharpener, including the following steps:

[0043] S1. Insert the pencil into the pencil insertion hole in the pencil feed assembly. The pencil inserted into the insertion hole can push the actuating element in the pencil feed assembly, and the actuating element can drive the trigger rod to trigger the control device. The structure of installing the actuating element and the trigger rod in the pencil feed assembly is existing technology and will not be described in detail here.

[0044] S2. The control device controls the pencil sharpening motor 5 and the pencil feeding motor 13 to work simultaneously. The pencil sharpening motor 5 transmits power to the roller cutter 2 assembly through the pencil sharpening transmission assembly, and the roller cutter 2 begins to rotate. The pencil feeding motor 13 transmits power to the pencil feeding assembly through the pencil feeding transmission assembly, and the pencil feeding assembly clamps the pencil and feeds it towards the roller cutter 2 assembly. When the pencil enters the roller cutter 2 assembly, the roller cutter 2 assembly cuts the pencil tip.

[0045] S3. During the cutting process, the pencil tip will push the drive rod 9 to move downward. After the cutting time is completed, the button 801 of the adjustment switch 8 at the lower end of the drive rod 9 will be pressed. The adjustment switch 8 will transmit a signal to the control device, and then the control device will control the pen feeding motor 13 to stop working, and the pen feeding component will no longer feed the pencil.

[0046] S4. At this time, the pencil sharpening motor 5 continues to work and begins to sharpen the surface of the pencil tip.

[0047] S5. After sharpening is completed, the control device controls the pencil sharpening motor 5 to stop working, and at the same time controls the pencil feeding motor 13 to work in reverse, so that the pencil feeding assembly will eject the sharpened pencil.

[0048] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A fully automatic electric pencil sharpener, comprising a housing (1), wherein a pencil sharpening mechanism, a pencil feeding mechanism, and a control device are installed within the housing (1); the pencil sharpening mechanism comprises a roller blade assembly, a pencil sharpening driver, and a pencil sharpening transmission assembly, wherein the pencil sharpening driver is connected to the roller blade assembly via the pencil sharpening transmission assembly, and the pencil sharpening driver is electrically connected to the control device; the pencil feeding mechanism comprises a pencil feeding assembly, a pencil feeding driver, and a pencil feeding transmission assembly, wherein the pencil feeding driver is connected to the pencil feeding assembly via the pencil feeding transmission assembly, and the pencil feeding driver is electrically connected to the control device; characterized in that: It also includes a nib adjustment switch assembly, which is located inside the roller cutter assembly and is electrically connected to the control device. The nib adjustment switch assembly includes an adjustment switch (8) and a drive rod (9). The adjustment switch (8) and the drive rod (9) are both located inside the housing (1). One end of the drive rod (9) extends into the lower end of the pencil channel of the roller cutter assembly, and the other end of the drive rod (9) is connected to the adjustment switch (8). The adjustment switch (8) has a button (801). When the pencil is cut and before it is polished, the pencil tip will push the drive rod (9) to press the button (801) of the adjustment switch (8). The adjustment switch (8) sends a signal to the control device, and the control device controls the pencil feeding mechanism to stop feeding.

2. The fully automatic electric pencil sharpener according to claim 1, characterized in that: The pen feeding transmission assembly includes a pen feeding drive gear (14), a transmission rod (15), and a transition wheel (16). The pen feeding drive gear (14) is installed on the drive end of the pen feeding driver. The transmission rod (15) is rotatably connected to the housing (1). The two ends of the transmission rod (15) are respectively provided with a first gear (1501) and a second gear (1502). The first gear (1501) meshes with the pen feeding drive gear (14). The transition wheel (16) is rotatably connected to the pen feeding assembly. One side of the transition wheel (16) meshes with the transmission wheel (1201) in the pen feeding assembly, and the other side of the transition wheel (16) meshes with the second gear (1502) of the transmission rod (15).

3. The fully automatic electric pencil sharpener according to claim 2, characterized in that: The hobbing assembly includes a hobbing holder (3), which is installed inside the housing (1). The transmission rod (15) is rotatably connected to the hobbing holder (3). The lower end of the transmission rod (15) and the first gear (1501) are exposed outside the lower end of the hobbing holder (3). The second gear (1502) of the transmission rod (15) is exposed outside the upper end of the hobbing holder (3). The pen feed assembly is installed at the upper end of the hobbing holder (3). After the pen feed assembly is installed in place, the second gear (1502) meshes with the transition wheel (16).

4. The fully automatic electric pencil sharpener according to claim 3, characterized in that: The bottom of the housing (1) is provided with a base (6), and the base (6) is provided with a support platform (601); the pencil sharpening transmission assembly is installed on the upper side of the support platform (601), and the hobbing cutter holder (3) is installed on the upper side of the pencil sharpening transmission assembly.

5. The fully automatic electric pencil sharpener according to claim 4, characterized in that: The pen feed driver is a pen feed motor, which is located inside the base (6); the hobbing cutter holder (3) has a shaft hole, the support platform (601) has a connecting hole (603), the upper end of the transmission rod (15) is rotatably connected to the shaft hole, and the lower end of the transmission rod (15) is rotatably connected to the connecting hole (603); the first gear (1501) is located inside the base (6); the side wall of the transmission rod (15) is provided with a limiting protrusion ring (1503), which limits the upper side of the support platform (601).

6. The fully automatic electric pencil sharpener according to claim 4, characterized in that: The adjustment switch (8) is located inside the base (6); the support platform (601) has a first through hole in the middle, and the pencil sharpening transmission assembly has a second through hole in the middle. The first through hole and the second through hole are aligned to form a slide (10). The slide (10) is aligned with the pencil channel of the roller assembly. The drive rod (9) is slidably engaged in the slide (10).

7. The fully automatic electric pencil sharpener according to claim 6, characterized in that: The lower end of the drive rod (9) is provided with a mounting groove (901), the adjustment switch (8) is fixedly connected in the mounting groove (901) and the button (801) of the adjustment switch (8) is set downward; the base (6) is provided with a contact member (11). When the adjustment switch (8) moves downward, the button (801) will contact the contact member (11) to trigger the adjustment switch (8) to generate a signal.

8. The fully automatic electric pencil sharpener according to claim 3, characterized in that: The upper end of the roller holder (3) is provided with an embedding groove (302), and the lower end of the pen feed assembly is embedded in the embedding groove (302); the second gear (1502) extends into the embedding groove (302); the transition wheel (16) is installed on the side of the pen feed assembly.

9. The fully automatic electric pencil sharpener according to claim 8, characterized in that: The pen feed assembly has at least two locking blocks (1202) on its side wall. The inner wall of the embedding groove (302) has a sliding groove (303) that matches the locking blocks (1202). One end of the sliding groove (303) has an opening on its upper side. The height of the other end of the sliding groove (303) matches the height of the locking blocks (1202). The locking blocks (1202) can enter the sliding groove (303) through the opening. After rotating the pen feed assembly, the locking blocks (1202) can be engaged in the other end of the sliding groove (303).

10. A control method for a fully automatic electric pencil sharpener according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. The pencil is inserted into the pencil feeding mechanism, and the pencil triggers the control device to work. S2. The control device controls the pencil sharpening driver and the pencil feeding driver to work simultaneously. The pencil feeding assembly clamps the pencil and feeds it towards the roller cutter assembly. When the pencil enters the roller cutter assembly, the roller cutter assembly cuts the pencil tip. S3. After the pencil is sharpened, the pencil tip triggers the tip adjustment switch assembly to send a signal to the control device, and then the control device controls the feeding mechanism to stop feeding. S4. The roller cutter assembly continues to work, polishing the surface of the pencil tip; S5. After polishing is completed, the control device controls the sharpening driver to stop working, and at the same time controls the pen feed driver to work in reverse to complete the pen retraction.

Images