Electric pencil sharpener

Abstract

The utility model relates to the field of stationery, in particular to an electric pencil sharpener which comprises a shell, a pencil sharpener body and a pencil sharpener body, the shell is provided with an outer surface, an inner surface and a through hole, and the through hole is connected with the outer surface and the inner surface; the circuit board is arranged in the shell; the pencil sharpener core is electrically connected with the circuit board; the light source assembly comprises a light source fixed on the circuit board and mounted on the circuit board; and the sealing light guide assembly comprises a light signal input end and a light signal output end, the light signal input end is coupled with the light source, and the light signal output end is used for enabling at least one light path of the light source to pass through the through hole. The light source assembly is directly integrated on the circuit board, the mode that the circuit board and the light source are connected through an electric wire is replaced, the protection level of the electric pencil sharpener on pencil dust can be improved, and the influence of the pencil dust on the light source assembly is reduced.

Description

Technical Field

[0001] This application relates to the field of pencil sharpeners, and particularly to an electric pencil sharpener. Background Art

[0002] In the field of stationery, as a convenient and efficient auxiliary device for writing tools, electric pencil sharpeners have been widely used in places such as schools and offices. With the development of technology, electric pencil sharpeners not only pursue pencil sharpening efficiency and stability, but also gradually incorporate intelligent elements, such as signal indicators. The electric pencil sharpener indicates the working state of the pencil sharpener, such as standby, working, and malfunction, through signal indicators. These indicators are connected to the control system of the electric pencil sharpener through circuits to achieve real-time feedback of the state, so as to improve the user experience.

[0003] Since a large amount of pencil dust (i.e., pencil shavings) is generated during the use of an electric pencil sharpener, these tiny particles are easily suspended in the air and adhere to the indicator pin or circuit connection point, which will increase the contact resistance, resulting in poor signal transmission or flickering of the indicator light, and easily causing problems such as short circuit, poor contact, or weakening of the indicator light brightness in the circuit. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an electric pencil sharpener to improve the problem that the interior of the electric pencil sharpener is easily interfered by pencil dust and affects the normal operation of the signal indicator.

[0005] To solve the above technical problems, this application adopts the following technical solutions:

[0006] This application provides an electric pencil sharpener, including: a housing having an outer surface, an inner surface, and a through hole connecting the outer surface and the inner surface; a circuit board disposed inside the housing; a pencil sharpening mechanism electrically connected to the circuit board; a light source assembly including a light source fixed to and mounted on the circuit board; a sealed light guiding assembly including a light signal input end and a light signal output end, the light signal input end being coupled to the light source, and the light signal output end being used for at least one light path of the light source to pass through the through hole.

[0007] Further, the light source assembly is a surface-mounted light-emitting triode, integrally integrated on the circuit board.

[0008] Further, at least one light path of the light source is offset relative to the direction of the through hole.

[0009] Further, at least one light path of the light source enters the outer surface of the housing and is offset in a direction perpendicular to the through hole.

[0010] Further, the sealed light guiding assembly includes: a light guide column embedded in the light source assembly for closed coupling with the light source assembly and transmitting the light of the light source through the through hole.

[0011] Further, the sealed light guide assembly further includes: a polarizer disposed in the through hole and connected to one end of the light guide column away from the light source assembly for adjusting the optical path of the light source passing through the through hole.

[0012] Further, the light guide column and the polarizer are integrally formed.

[0013] Further, the shape of the polarizer is adapted to the shape of the through hole.

[0014] Further, the light guide column is made of at least one of hard transparent plastic, soft transparent plastic, and glass fiber.

[0015] Further, the light guide column has a bending structure adapted to the pencil sharpening mechanism.

[0016] As can be seen from the above technical solutions, the advantages and positive effects of the electric pencil sharpener proposed in this application are as follows:

[0017] In this application, by directly integrating the light source assembly on the circuit board and replacing the way of connecting the circuit board and the light source with wires, the protection level of the electric pencil sharpener against pencil dust can be improved, and the influence of pencil dust on the light source assembly can be reduced. Further, by setting the optical path of the light source integrated on the circuit board through the sealed light guide assembly, the display mode of the optical signal is enriched, thereby increasing the user's desire to purchase. In addition, the signal indicator light of this application only requires a surface-mounted light-emitting triode and a light guide column to achieve optical signal transmission. Compared with the parts such as a 3P socket, a metal connector terminal, a 3P plug, a light-emitting triode, a heat shrink tube, and wires required in the prior art, the assembly time and part cost are greatly reduced, and it has good economic benefits. Brief Description of the Drawings

[0018] The above content of this application and the following specific embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are only examples of the claimed technical solutions.

[0019] Figure 1 is a schematic structural diagram of the signal indicator light of an electric pencil sharpener in the prior art;

[0020] Figure 2 is a schematic structural diagram of the electric pencil sharpener provided by this application;

[0021] Figure 3 is a schematic structural diagram of the circuit board provided by this application;

[0022] Figure 4 is a schematic structural diagram of the light guide column provided by this application;

[0023] Figure 5 is a schematic diagram of the light guide column assembled on the circuit board provided by this application.

[0024] Among them, the reference numerals are explained as follows:

[0025] Circuit board 10;

[0026] Pencil sharpening mechanism 20;

[0027] Light source assembly 30;

[0028] Sealed light guide assembly 40;

[0029] Optical signal input terminal 41;

[0030] Optical signal output terminal 42;

[0031] Power supply 50;

[0032] Electric wire 100;

[0033] Metal connector terminal 200;

[0034] Heat shrinkable tube 300;

[0035] Soldering position 400;

[0036] 3P socket 500;

[0037] 3P plug 600. Detailed implementation manners

[0038] The following describes in detail the detailed features and advantages of the present application in the detailed implementation manners. The content is sufficient for any person skilled in the art to understand the technical content of the present application and implement it accordingly. And according to the specification, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant purposes and advantages of the present application.

[0039] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0041] To make the purpose, technical solution and advantages of the present application clearer, the following will further describe the implementation manners of the present application in detail with reference to the drawings.

[0042] As Figure 1As shown, the signal indicator light of the current electric pencil sharpener on the market is generally composed of a circuit board 10 and a wire 100. A 3P socket 500 is provided on the circuit board. One end of the wire 100 needs to be crimped with a metal connector terminal 200 and then inserted into a 3P plug 600. The other end of the wire 100 and the light source assembly 30 need to be first sleeved with a heat shrinkable tube 300, and then soldered. The heat shrinkable tube 300 is heated and fixed at the soldering position 400 to realize the connection between the light source assembly 30 and the wire 100.

[0043] It can be understood that this assembly method is relatively cumbersome and not conducive to high industrialization. Moreover, this structure makes it easy for tiny particles to suspend in the air and adhere to the indicator pins or circuit connection points, which will increase the contact resistance, resulting in poor signal transmission or flickering of the indicator light, and easily causing problems such as circuit short - circuit, poor contact or weakening of the indicator light brightness.

[0044] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the electric pencil sharpener provided by this application. The electric pencil sharpener may include: a housing (not shown in the figure), a circuit board 10, a pencil sharpening mechanism 20, a light source assembly 30, a sealed light - guiding assembly 40, and a power supply 50.

[0045] Among them, the housing has an outer surface, an inner surface, and a through - hole connecting the outer surface and the inner surface. Specifically, the housing includes an upper housing, a lower housing, and an intermediate connecting part connecting the upper housing and the lower housing. The upper housing is located at the top of the electric pencil sharpener and is designed with a hole or slot for inserting a pencil so that the pencil can smoothly enter the sharpening area. The lower housing is located at the bottom of the electric pencil sharpener and is used to fix and support internal components such as motors and transmission gears. The intermediate connecting part has a certain strength and toughness, and can firmly connect the upper housing and the lower housing together through fasteners such as fixing screws or buckles to ensure the stability and durability of the entire housing.

[0046] Please refer to Figure 3 , the circuit board 10 can be a printed circuit board 10 (Printed Circuit Board, PCB), which is arranged inside the housing and is electrically connected to the pencil sharpening mechanism 20. By using the characteristics of high integration and precise control of the printed circuit board 10, the automation and intelligent control of the sharpening process are realized, and parameters such as the start - stop time and rotation speed of the pencil sharpening mechanism 20 are precisely controlled to ensure the stability and consistency of the sharpening process, and prevent over - cutting or under - cutting of writing utensils such as pencils.

[0047] The pencil sharpening mechanism 20 may specifically include a knife holder, a blade, and a driving mechanism. Among them, the knife holder is a structure for supporting and fixing the blade, usually having one or more pencil sharpening holes for guiding the pencil to pass through and receiving the cutting of the blade. The blade is a cutting element in the pencil sharpening mechanism 20, responsible for shaving off the wooden part of the pencil to expose the lead. The blade is usually installed on the knife holder and can be replaced to maintain the sharpness of the pencil sharpener. The driving mechanism may include a motor, a reducer, transmission components, etc. The motor provides power, the reducer reduces the speed of the motor and increases the torque, and the transmission components transmit the power of the motor to the blade to make it perform the cutting action.

[0048] Please refer to Figure 4 and Figure 5 , the light source assembly 30 includes a light source fixed to the circuit board 10 and mounted on the circuit board 10. Exemplarily, the light source assembly 30 may be a surface-mounted light-emitting triode, integrally integrated on the circuit board 10.

[0049] It can be understood that the surface-mounted light-emitting triode can also be called a surface-mounted LED or a surface-mounted light-emitting diode. It adopts a miniaturized design, and its size is much smaller than that of the traditional through-hole LED, which can significantly reduce the occupied space on the circuit board 10. In addition, due to its small volume, the surface-mounted LED is more easily integrated with high density in small electronic devices.

[0050] Compared with the traditional through-hole LED commonly used in the industry's electric pencil sharpeners, the surface-mounted LED can eliminate the need for manual soldering of pins, reducing the complexity and error rate in the assembly process. At the same time, the surface-mounted light-emitting triode is suitable for the surface-mounting process on an automated production line, greatly improving the production efficiency. The surface-mounted package enables the LED chip to be better protected, reducing the risk of damage caused by external impact or vibration.

[0051] In an implementable manner of the present application, the surface-mounted light-emitting triode may include multiple types of different colors, used to generate light sources of different colors, so as to display the current working state information of the electric pencil sharpener by the light path passing through the through-hole of the housing or the color representation of the corresponding light source presented outside the housing.

[0052] It can be understood that the working state information may be a safety warning. For example, if the pencil sharpener detects overheating, jamming, or other abnormal conditions, the surface-mounted light-emitting triode can emit red or flashing lights to remind the user to stop using and check the pencil sharpener.

[0053] The power supply of an electric pencil sharpener mostly uses batteries for power supply. Therefore, the portability of the electric pencil sharpener is also one of the factors that users consider when purchasing. Due to its material characteristics and packaging technology, the surface-mounted LED has high luminous efficiency and low energy consumption. In addition, the surface-mounted packaging is conducive to the rapid dissipation of heat, reducing the operating temperature of the LED chip, helping to reduce the risk of damage to the LED chip due to overheating, improving its stability and reliability, and thus extending its service life.

[0054] The sealed light guide assembly 40 includes a light signal input end and a light signal output end. The light signal input end is coupled to the light source, and the light signal output end is used for at least one light path of the light source to pass through the through hole.

[0055] Specifically, the sealed light guide assembly 40 may include a housing, a light guide member, and a sealing member. Among them, the housing can serve as the main support structure of the sealed light guide assembly 40. The housing can be provided with a mounting seat, a light outlet hole, etc. There is an accommodation space inside the mounting seat for mounting the light guide member and the sealing member. The light guide assembly includes a main body part and a light outlet part. The main body part is responsible for connecting with the housing, and the light outlet part corresponds to the light outlet hole to export the light. The sealing ring is clamped between the housing and the light guide member to ensure the sealing performance of the sealed light guide assembly 40.

[0056] It can be understood that a single light source can be divided into multiple light paths through the light guide member. Or multiple light sources can be converged into a single light path through the light guide member. Among them, the light path generated by at least one light source can be offset relative to the direction of the through hole to avoid directly irradiating the user and reduce discomfort.

[0057] In addition, by setting a translucent or opaque element (such as a button) at a position close to the outer surface of the through hole of the housing, the light path generated by the light source is blocked by the element and offset in the direction perpendicular to the through hole on the outer surface of the housing, presenting a light signal around the through hole on the outer surface of the housing and showing a unique visual effect.

[0058] The light guide member can be a light guide column, which is embedded in the light source assembly 30 for closed coupling with the light source assembly 30 and transmitting the light of the light source through the through hole.

[0059] The sealed light guide assembly 40 can also be an integrally formed light guide column. Through specific processing techniques (such as injection molding, die casting, etc.), each part structure of the light guide column (such as the light inlet, transmission channel, light outlet, etc. of the light guide column) is formed at one time without subsequent assembly, thereby improving the integrity and precision of the product.

[0060] Since the integrally formed light guide column is formed at one time, it avoids the errors that may occur during the assembly process, improving the precision of the light guide column. And the overall structure is firm, not easy to loosen or deform, ensuring the stability of long-term use. The loss of light during the transmission process is small, improving the utilization rate and transmission efficiency of light.

[0061] It can be understood that the signal indicator light of the present application only needs a surface-mounted light-emitting triode and a light guide column to achieve optical signal transmission. Compared with the parts such as a 3P socket 500, a metal connector terminal 200, a 3P plug 600, a light-emitting triode, a heat shrink tube 300, and a wire 100 required by the prior art, the assembly time and part cost are greatly reduced, and it has good economic benefits.

[0062] The processing of the light guide column can be completed at one time by injection molding (hard transparent plastic) or extrusion molding (soft transparent plastic) or other transparent materials that can be bent arbitrarily (such as glass fiber, etc.). The process is simple and the cost is low, which can greatly save the processing cost.

[0063] The sealed light guide assembly 40 may further include a polarizing member. The polarizing member is disposed in the through hole and connected to one end of the light guide column away from the light source assembly 30 for adjusting the optical path of the light source passing through the through hole. Further, the light guide column and the polarizing member may be integrally formed.

[0064] The shape of the polarizing member may be adapted to the shape of the through hole. Exemplarily, the through hole may be circular, and the shape of the polarizing member may be similar to a circle, such as an ellipse, etc.

[0065] The light guide column has a bending structure adapted to the pencil sharpening mechanism 20.

[0066] It can be understood that the pencil sharpening mechanism 20 occupies most of the space inside the housing, which may lead to low space utilization rate inside the housing, restricting the designer's play in the product appearance, shape, and additional functions, resulting in the designer may need to sacrifice the aesthetics, innovation, and practicality of the product in order to accommodate the large pencil sharpening mechanism 20. The light guide column can increase the space utilization rate inside the housing through the bending structure and reduce the overall volume of the electric pencil sharpener.

[0067] The power supply 50 is connected to the pencil sharpening mechanism 20 and the circuit board 10 for supplying power to the pencil sharpening mechanism and the circuit board 10.

[0068] In an implementable manner of the present application, the power supply 50 may be either a battery-type power supply or a rechargeable power supply.

[0069] It can be understood that an electric pencil sharpener is internally equipped with a rechargeable or disposable battery to provide power for the motor to drive the blade for sharpening. The user can regularly replace the battery or charge it as needed to maintain the use of the pencil sharpener. The rechargeable power supply is equipped with a charging interface, and the user can charge it by connecting a power adapter. Among them, the charging form can be wired charging, wireless charging, or a combination of wired charging and wireless charging. After charging, the pencil sharpener can continue to be used for a period of time without replacing the battery.

[0070] The power source 50 can also be of the type that combines a battery power source and a rechargeable power source, that is, it has both battery power supply and recharge power supply modes at the same time. This design improves the flexibility of the usage scenario, and it can continue to be used by battery power supply even in the absence of a power socket. At the same time, it also avoids the sudden interruption of pencil sharpening due to battery depletion.

[0071] The terms and expressions used herein are for descriptive purposes only, and the present application should not be limited to these terms and expressions. The use of these terms and expressions does not mean excluding any equivalent features of the illustration and description (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations and substitutions may also exist. Accordingly, the claims should be regarded as covering all such equivalents.

[0072] Similarly, it should be noted that although the present application has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. An electric pencil sharpener, characterized in that: include: A shell having an outer surface, an inner surface, and a through hole connecting the outer surface and the inner surface; A circuit board is arranged in the housing; A pencil sharpener mechanism electrically connected to the circuit board; A light source assembly, comprising a light source mounted on the circuit board; The sealed light guide assembly comprises an optical signal input end and an optical signal output end, wherein the optical signal input end is coupled with the light source, and the optical signal output end is used for at least one optical path of the light source to pass through the through hole.

2. The electric pencil sharpener according to claim 1, characterized in that: The light source component is a surface-mount light emitting triode, which is integrated on the circuit board.

3. The electric pencil sharpener according to claim 1, characterized in that: At least one optical path of the light source is offset relative to the through hole.

4. The electric pencil sharpener according to claim 1, characterized in that: At least one light path of the light source entering the outer surface of the housing is offset in a direction perpendicular to the through hole.

5. The electric pencil sharpener according to claim 1, characterized in that: The sealed light guide assembly comprises: The light guide column is embedded in the light source assembly and is used for closed coupling with the light source assembly to transmit the light from the light source through the through hole.

6. The electric pencil sharpener according to claim 5, characterized in that: The sealed light guide assembly also includes: A polarizer is disposed in the through hole and connected to an end of the light guide column away from the light source assembly, and is used to adjust the light path of the light source passing through the through hole.

7. The electric pencil sharpener according to claim 6, characterized in that: The light guide column and the polarizer are integrally formed.

8. The electric pencil sharpener according to claim 6, characterized in that: The shape of the polarizer is adapted to the shape of the through hole.

9. The electric pencil sharpener according to claim 5, characterized in that: The light guide column is made of at least one material including hard transparent plastic, soft transparent plastic and glass fiber.

10. The electric pencil sharpener according to claim 5, characterized in that: The light guide column has a curved structure adapted to the pencil sharpening mechanism.

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