A top-mounted motor with adjustable speed for sharpening pencils.

Abstract

This utility model discloses a top-mounted, adjustable-speed rotary pencil sharpener, including a support cover, a pencil holder on the support cover, a support gear below the support cover, and a pair of support shafts inside the support cover. A start switch and a PCB circuit board are connected to the pencil holder on one side. The PCB circuit board is connected to the motor circuit, and the motor is connected to the support gear via a gear set. A blade holder is located below the support gear, and an adjustment component for adjusting the pencil tip thickness is located below the blade holder. The pencil tip thickness is controlled by the up-and-down movement of the adjustment rod via a seesaw structure. When the pencil tip reaches the top of the adjustment rod, the PCB circuit board controls the motor to reverse and retract the pencil. The closer distance between the motor and the blade assembly results in less motor power loss, a more compact connection structure with less mechanical friction noise, more stable motor speed, and a more stable center of gravity. The bottom shavings box design allows for a larger shavings capacity and easier cleaning.

Description

Technical Field

[0001] This utility model relates to the field of pencil sharpener technology, specifically a roller pencil sharpener with an adjustable gear and an upper-mounted motor. Background Technology

[0002] Currently, the distance between the motor and the blade assembly in pencil sharpeners on the market is relatively large, or the motor is located at the bottom. The connection structure between the motor and the blade assembly is not compact enough, resulting in greater mechanical friction noise during operation. This leads to greater power loss of the motor during pencil sharpening, and the motor speed is not stable enough. The bottom shavings box is also relatively small, resulting in a smaller shavings storage capacity.

[0003] Therefore, the purpose of this utility model is to provide a roller pencil sharpener with an adjustable gear position for the top-mounted motor. Utility Model Content

[0004] In view of the problems existing in the current type of rotary pencil sharpener, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A top-mounted motor with adjustable gears for a rotary pencil sharpener includes: a support cover, a pencil holder on the support cover, a support gear below the support cover, the support gear meshing with a pair of support shafts inside the support cover, a start switch and a PCB circuit board connected by wiring on one side of the pencil holder, the PCB circuit board being connected to the motor wiring, the motor being connected to the support gear via a gear set, a blade holder below the support gear, a blade set with blade teeth and a blade set inside the blade holder, and an adjustment component for adjusting the pencil tip thickness below the blade holder.

[0007] As a preferred embodiment of the present invention, the adjusting component includes a gear adjusting block, one end of which is provided with an adjusting switch, the adjusting switch being provided with an adjusting rod located below the conical opening of the blade assembly, the other end of which is provided with an upper shifting link and a lower supporting spring, and the shifting link being provided with a shifting slide.

[0008] As a preferred embodiment of this utility model, the shift slide is provided with a plurality of inclined sliding surfaces, and a limiting groove that cooperates with the top end of the shift linkage is provided between the inclined sliding surfaces, and baffles are provided on both sides of the plurality of inclined sliding surfaces.

[0009] As a preferred embodiment of this utility model, the pen insertion port of the bracket cover and the pen holder are misaligned, and the pen holder is misaligned near the start switch.

[0010] As a preferred embodiment of this utility model, a return spring is provided on the inner side of the bracket cover and the pen holder.

[0011] As a preferred embodiment of this utility model, the gear set includes a motor gear, gear 3 and gear 2 connected in sequence, and gear 2 is connected to the support gear.

[0012] As a preferred embodiment of this utility model, an indicator light is connected to the PCB circuit board 11.

[0013] As a preferred embodiment of this invention, it also includes a lithium battery for power supply.

[0014] Compared with existing technologies: The adjustment component has several inclined sliding surfaces on the shifting slide. The left and right sliding of the shifting slide controls the downward movement of the shifting linkage, and the seesaw structure controls the up and down movement of the adjustment rod, thereby controlling the thickness of the pen tip. When the pen tip reaches the top of the adjustment rod, the adjustment switch is activated, and the PCB circuit board controls the motor to reverse and retract the pen. This invention creates a closer distance between the motor and the blade assembly, resulting in less motor power loss. The connection structure between the motor and the blade assembly is more compact, and the mechanical friction noise during operation is less, making it quieter. The motor speed is more stable during pen sharpening. The upper-mounted motor has a more centered center of gravity, resulting in greater stability during pen sharpening. The bottom shavings box design allows for a larger shavings capacity and easier cleaning. Attached Figure Description

[0015] Figure 1 A top view of one embodiment of this utility model;

[0016] Figure 2 for Figure 1 Sectional view of AA;

[0017] Figure 3 A perspective view of one embodiment of this utility model;

[0018] Figure 4 A schematic diagram of a gear set structure according to an embodiment of this utility model;

[0019] Figure 5 A schematic diagram of the adjustment component structure of one embodiment of this utility model;

[0020] Figure 6 A schematic diagram of the internal structure of the adjustment component according to an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the component structure of a starter motor according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] This utility model discloses a top-mounted motor adjustable roller pencil sharpener. The purpose of this patent is to solve the problem of roller pencil sharpeners on the market that lack a top-mounted motor and have multiple adjustable tip thicknesses. Its structure is as follows: Figures 1 to 7 As shown, it includes: a bracket cover 1, a pen holder 2 on the bracket cover 1, and pen slots on both the bracket cover 1 and the pen holder 2. A start switch 5 and a PCB circuit board 11 connected by circuitry are located on one side of the pen holder 2, for example, see reference... Figure 1 The positional relationship is such that before the pencil is inserted, the two are misaligned, and the pencil holder 2 is misaligned near the start switch 5. The pencil holder 2 is in contact with the component 5. When the pencil is inserted, the pencil holder 2 moves to the left, and the pencil insertion opening of the bracket cover 1 and the pencil holder 2 are in a concentric position. The pencil holder 2 is separated from the component 5. At this time, an electrical signal is given to the bracket cover 1 to control the motor 10 to rotate. A return spring 22 is provided inside the bracket cover 1 and the pencil holder 2. When the control motor 10 receives a reverse signal, it reverses and retracts the pencil. Under the action of the return spring 22, the bracket cover 1 and the pencil holder 2 are misaligned, and the pencil holder 2 is in contact with the component 5.

[0024] The nib thickness can be adjusted in the following ways:

[0025] A bracket gear 3 is provided below the bracket cover 1. The bracket gear 3 meshes with a pair of bracket shafts 21 inside the bracket cover 1. The pair of bracket shafts 21 are located above the bracket gear 3. A motor 10 is connected to the side of the bracket gear 3 through a gear set. The motor 10 is connected to the PCB circuit board 11. Specifically, the gear set includes a motor gear 9, gear 3 (8), and gear 2 (7) connected in sequence. Gear 2 (7) is connected to the bracket gear 3. Thus, the motor 10 is closer to the blade assembly, and the motor power loss is small. We call this an upper-mounted motor with a center of gravity that is slightly above the middle. A blade holder 17 is provided below the bracket gear 3. The blade holder 17 contains blade gears 18 and blade assembly 19. An adjustment component for adjusting the pen tip thickness is provided below the blade holder 17.

[0026] Specifically, the adjustment assembly includes a gear adjustment block 13 located below the blade holder 17. One end of the gear adjustment block 13 is equipped with an adjustment switch 15, and the adjustment switch 15 is equipped with an adjustment rod 16 located below the conical opening of the blade assembly 19. The other end of the gear adjustment block 13 is equipped with an upper stop linkage 12 and a lower support spring 14. The stop linkage 12 is equipped with a shifting slide 6. When the blade assembly 19 rotates to cut the pencil, when the pencil tip has cut to a certain length, the pencil tip will hit the top of the adjustment rod 16. By activating the adjustment switch 15, the adjustment switch 15 sends an electrical signal to the PCB circuit board 11, which in turn controls the motor 10 to reverse and retract the pencil.

[0027] Specific shift slider 6, such as Figure 6As shown, the shift slide 6 is provided with a plurality of inclined sliding surfaces 61, and a limiting groove 62 is provided between the inclined sliding surfaces 61 to cooperate with the top of the shift linkage 12. The plurality of inclined sliding surfaces 61 are provided with baffles 63 on both sides to prevent the shift linkage 12 from sliding out during adjustment. The shift linkage 12 is controlled to move downward by sliding the shift slide 6 left and right, and the shift adjustment block 13 of the seesaw structure is used to control the up and down movement of the adjustment rod 16, thereby controlling the thickness of the pen tip.

[0028] As shown in the figure, there are three inclined sliding surfaces 61, and the inclined sliding surfaces 61 become lower from left to right. When adjusting, if the stop lever 12 is at the leftmost end, the top of the adjusting rod 16 is at the lowest position through the seesaw structure stop adjusting block 13, so that the pen tip is sharpened to a finer point. If the stop lever 12 is at the rightmost end, the top of the adjusting rod 16 is at the highest position, so that the pen tip is sharpened to a coarser point. This is how to control the thickness of the pen tip.

[0029] Furthermore, the PCB circuit board 11 is connected to an indicator light 4 and also has a lithium battery 20 to provide power.

[0030] The present invention creates a closer distance between the upper motor 10 and the blade assembly 19, resulting in less power loss of the motor 10. The connection structure between the motor 10 and the blade assembly 19 is more compact, and the mechanical friction noise during operation is less, making it quieter. The motor 10 speed is more stable when sharpening the pencil. The upper motor has a more centered center of gravity, which makes it more stable when sharpening the pencil. The bottom shavings box design can be larger, with a larger shavings storage capacity and easier cleaning.

[0031] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A top-mounted motor with adjustable gears for a roller pencil sharpener, characterized in that, include: The bracket has a top cover with a pen holder. Below the top cover is a bracket gear that meshes with a pair of bracket shafts inside the top cover. A start switch and a PCB circuit board are connected to the pen holder. The PCB circuit board is connected to a motor circuit. The motor is connected to the bracket gear through a gear set. Below the bracket gear is a blade holder with blade teeth and blades. Below the blade holder is an adjustment component for adjusting the pen tip thickness.

2. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, The adjustment component includes a gear adjustment block, one end of which is provided with an adjustment switch. The adjustment switch is provided with an adjustment rod located below the conical opening of the blade assembly. The other end of the gear adjustment block is provided with an upper shifting linkage and a lower support spring. The shifting linkage is provided with a shifting slide.

3. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 2, characterized in that, The shift slide has several inclined sliding surfaces, and there are limiting grooves between the inclined sliding surfaces that cooperate with the top of the shift linkage. There are baffles on both sides of the several inclined sliding surfaces.

4. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, The pen holder and the pen holder are misaligned, and the pen holder is misaligned near the start switch.

5. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, The bracket cover and the inner side of the pen holder are equipped with reset springs.

6. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, The gear set includes a motor gear, gear 3 and gear 2 connected in sequence, with gear 2 connected to the support gear.

7. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, Indicator lights are connected to the PCB circuit board.

8. A top-mounted motor with adjustable gears for a roller pencil sharpener according to claim 1, characterized in that, It also includes the lithium battery that powers the system.

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