Press-Type Overvoltage Protection Electronic Pen

Abstract

An embodiment of the present invention discloses a push-button overpressure protection electronic pen, which includes a pen body, a pen core, a pressure sensor, and a control main board. A pen core cavity for accommodating the pen core is provided on the pen body, the pen core is inserted into the pen core cavity, the pressure sensor is arranged at the end of the pen core cavity, and a push-button overpressure protection mechanism in contact with the pressure sensor is correspondingly arranged in the pen core cavity. The push-button overpressure protection mechanism includes a sleeve, a push rod, a claw sleeve, an overpressure protection spring, and an end cap. The push rod and the claw sleeve are relatively arranged in the sleeve; the overpressure protection spring is arranged between the push rod and the end cap to apply a forward elastic force to the push rod; the front end of the claw sleeve contacts the end of the pen core. The push-button overpressure protection mechanism of the present invention adopts a push-button structure similar to that of a ballpoint pen, which can not only realize the function of pushing out the pen core by pressing, but also transmit the writing pressure to the pressure sensor and realize the overpressure protection function. The structure is simple, the assembly is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic pens, and in particular, to a pressing type overpressure protection electronic pen. Background Art

[0002] With the emergence of people's needs for writing on touch screens and books, more and more pens that can be used as both ballpoint pens and electronic pens have been introduced to the market. In the prior art, some electronic pens have a writing pressure detection function, but they cannot achieve the dual-use function or overpressure protection. Some can achieve the dual-use function. For example, the invention patent with the application number 202310481238.X and the invention name "Pressing type switching electronic pen based on a metal ballpoint pen refill" discloses a technical solution for switching between the electronic pen function and the ballpoint pen function by pressing the tip of the metal ballpoint pen refill to pop out the metal ballpoint pen refill, then pulling out the metal ballpoint pen refill, turning it around and inserting it again. However, although this solution can achieve the function of pressing to pop out the pen refill, it cannot achieve pressure detection, and thus cannot achieve fine operations such as simulating original handwriting writing, painting, and signing. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a pressing type overpressure protection electronic pen to achieve the functions of pressing to pop out the pen refill, pressure detection, and overpressure protection.

[0004] To solve the above technical problem, the embodiments of the present invention propose a pressing type overpressure protection electronic pen, which includes a pen body, a pen refill, a pressure sensor, and a control main board. A pen refill cavity for accommodating the pen refill is provided on the pen body, the pen refill is inserted into the pen refill cavity, the pressure sensor is arranged at the end of the pen refill cavity, and a pressing type overpressure protection mechanism in contact with the pressure sensor is correspondingly arranged in the pen refill cavity. The pressing type overpressure protection mechanism includes a sleeve, a push rod, a claw sleeve, an overpressure protection spring, and an end cap. The push rod and the claw sleeve are relatively arranged inside the sleeve; the overpressure protection spring is arranged between the push rod and the end cap to apply a forward elastic force to the push rod; the front end of the claw sleeve is in contact with the end of the pen refill.

[0005] Further, n guide posts are provided on the inner wall of the sleeve, n guide grooves are formed between the guide posts, guide blocks located in the guide grooves are provided on the outer periphery of the push rod, sliders matching the guide grooves are provided on the outer periphery of the claw sleeve, 2n convex teeth are provided at the end of the claw sleeve, the 2n convex teeth are arranged in a circle in sequence, convex blocks corresponding to the convex teeth are provided at the front end of the push rod, and inclined surfaces for corresponding cooperation are provided at the front end of the guide post and the end of the slider, where n is an integer greater than or equal to 2.

[0006] Further, guide blocks are provided on the outer periphery of the push rod, and guide grooves corresponding to the guide blocks are provided on the sleeve.

[0007] Further, the pen refill is a ballpoint pen refill with a metal tube body.

[0008] Further, a preloading spring is provided in the refill cavity. A clamping portion for clamping the tail of the refill is provided on the preloading spring. One end of the preloading spring is connected to the signal transmitting end on the control main board.

[0009] Further, a guiding tube for guiding the refill is provided in the refill cavity, and the inner wall of the guiding tube is insulated.

[0010] Further, a rubber cap is installed at the end of the refill.

[0011] Further, a contact rod corresponding to the pressure sensor is provided at the end of the end cap.

[0012] The beneficial effects of the present invention are as follows: The pressing type overpressure protection mechanism of the present invention adopts a pressing structure similar to that of a ballpoint pen. While realizing the function of pressing and ejecting the refill, it can also transmit the writing pressure to the pressure sensor and achieve the overpressure protection function. The structure is simple, the assembly is simple, and the cost is low. Description of the Drawings

[0013] Figure 1 is a structural diagram of the pressing type overpressure protection electronic pen of the embodiment of the present invention when the refill is retracted.

[0014] Figure 2 is Figure 1 a cross-sectional view taken along line B-B in

[0015] Figure 3 is a structural diagram of the pressing type overpressure protection electronic pen of the embodiment of the present invention when the refill is ejected.

[0016] Figure 4 is Figure 3 a cross-sectional view taken along line A-A in

[0017] Figure 5 is an internal structural diagram of the pressing type overpressure protection electronic pen of the embodiment of the present invention.

[0018] Figure 6 is a perspective view of the sleeve of the embodiment of the present invention from one angle.

[0019] Figure 7 is a perspective view of the sleeve of the embodiment of the present invention from another angle.

[0020] Figure 8 is a perspective view of the preloading spring of the embodiment of the present invention.

[0021] Figure 9 is an internal structural diagram of the pressing type overpressure protection mechanism of the embodiment of the present invention.

[0022] Explanation of the Reference Numerals in the Drawings

[0023] The pen body 1, pen refill 2, pressure sensor 3, control main board 4, sleeve 5, push rod 6, sliding claw sleeve 7, overpressure protection spring 8, end cap 9, guide post 10, guide block 11, slider 12, convex tooth 13, convex block 14, guide block 15, guide groove 16, pre-pressure spring 17, clamping part 18, guide tube 19, rubber cap 20, contact rod 21. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back...), they are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, in the present invention, the descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0027] Please refer to Figures 1 to 9 , the push-button overpressure protection electronic pen in the embodiments of the present invention includes a pen body, a pen refill, a pressure sensor, and a control main board.

[0028] A pen refill cavity for accommodating the pen refill is provided on the pen body, and the pen refill is inserted into the pen refill cavity. The pressure sensor is arranged at the end of the pen refill cavity. The pressure sensor is connected and communicates with the control main board.

[0029] A push-button overpressure protection mechanism in contact with the pressure sensor is correspondingly arranged in the pen refill cavity. The push-button overpressure protection mechanism includes a sleeve, a push rod, a sliding claw sleeve, an overpressure protection spring, and an end cap. The push rod and the sliding claw sleeve are relatively arranged inside the sleeve. The overpressure protection spring is arranged between the push rod and the end cap and applies a forward elastic force to the push rod. The front end of the sliding claw sleeve contacts the end of the pen refill. The push-button overpressure protection mechanism of the present invention is somewhat similar to the structure of an existing push-button ballpoint pen. The difference is that the spring of the existing ballpoint pen acts on the pen refill, while the structure of the present invention is opposite, and the overpressure protection spring of the present invention acts on the push rod. The normal writing state is that the tip of the pen refill protrudes outside the pen body for convenient writing; when the pen refill needs to be ejected, press the pen refill on the paper, and the pen refill will be ejected, which is convenient for the user to pull out the pen refill and then replace the pen refill or turn the pen refill around (that is, the pen refill turning state, replace the rubber cap at the other end of the pen refill, which is more convenient for writing on the capacitive screen); when reinstalling, insert the pen refill into the pen refill cavity so that the end of the pen refill contacts the sliding claw sleeve.

[0030] The present invention adopts a pressing - type over - pressure protection mechanism to transmit the writing pressure, and at the same time realizes the functions of over - pressure protection and pressing - pop - up. The structure is simple, the assembly is simple, and the cost is low. Multiple complex functions are realized with a simple structure.

[0031] As an implementation manner, n guide posts are provided on the inner wall of the sleeve. n guiding grooves are formed between the guide posts. n guiding blocks matching the guiding grooves are provided on the outer periphery of the push rod. n sliding blocks matching the guiding grooves are provided on the outer periphery of the claw sleeve. 2n convex teeth are provided at the end of the claw sleeve, and the 2n convex teeth are arranged in a circle in sequence. A convex block corresponding to the convex teeth is provided at the front end of the push rod. The convex teeth are triangular, and the side of the convex block facing the convex teeth is a corresponding inclined plane. Specifically in implementation, the convex teeth can also be provided on the push rod, and the convex blocks are correspondingly provided on the claw sleeve. Corresponding inclined planes are provided at the front end of the guide post and the end of the sliding block. n is an integer greater than or equal to 2, and n is generally 3 or 4. This part of the structure is similar to the structure of the existing pressing - type ballpoint pen.

[0032] As an implementation manner, a guide block is provided on the outer periphery of the push rod, and a guide groove corresponding to the guide block is provided on the sleeve. The guide block and the guide groove cooperate to guide the movement of the push rod, prevent the over - pressure protection spring from being torsionally deformed, and prevent the push rod from rotating at the same time.

[0033] As an implementation manner, the pen core is a ballpoint pen core with a metal tube body. The area of the metal part of the ballpoint pen core with a metal tube body is larger, which is more conducive to the layout and assembly of the structure (pre - pressure spring) for conducting between the pen core and the signal transmitting end on the control main board in the pen body.

[0034] As an implementation manner, a pre - pressure spring is provided in the pen core cavity. A clamping part for clamping the tail of the pen core is provided at one end of the pre - pressure spring, and the other end of the pre - pressure spring is connected to the signal transmitting end on the control main board. The clamping part can adopt a structure like a paper clip. When the pen core is inserted, it can clamp the end of the pen core. While conducting, it provides a pre - pressure for the writing of the pen core and improves the writing feel.

[0035] As an implementation manner, a guide tube for guiding the pen core is provided in the pen core cavity, and the inner wall of the guide tube is insulated.

[0036] As an implementation manner, a rubber cap is installed at the end of the pen core. The rubber cap is made of conductive silica gel, which is convenient for writing on a capacitive screen. When writing on a capacitive screen, the pen core can be inserted into the pen core cavity with the tip turned around; it is also possible to directly write on the capacitive screen with the pen tip. The pen tip is made of metal and can be directly used for writing on the capacitive screen.

[0037] As an implementation manner, a contact rod corresponding to the pressure sensor is provided at the end of the end cap. The contact rod can better transmit the writing pressure at the pen core end.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressing type overvoltage protection electronic pen, comprising a pen body, a pen core, a pressure sensor, and a control main board. A pen core cavity for accommodating the pen core is provided on the pen body, and the pen core is inserted into the pen core cavity. It is characterized in that, The pressure sensor is arranged at the end of the refill cavity, and a pressing overpressure protection mechanism in contact with the pressure sensor is correspondingly arranged in the refill cavity. The pressing overpressure protection mechanism includes a sleeve, a push rod, a sliding claw sleeve, an overpressure protection spring, and an end cap. The push rod and the sliding claw sleeve are relatively arranged in the sleeve; the overpressure protection spring is arranged between the push rod and the end cap to apply a forward elastic force to the push rod; the front end of the sliding claw sleeve contacts the end of the refill. The inner wall of the sleeve is provided with n guide posts, and n guide grooves are formed between the guide posts. Guide blocks located in the guide grooves are arranged on the outer periphery of the push rod. Sliders matching the guide grooves are arranged on the outer periphery of the sliding claw sleeve. 2n convex teeth are arranged at the end of the sliding claw sleeve in sequence to form a circle. Convex blocks corresponding to the convex teeth are arranged at the front end of the push rod. Corresponding mating inclined surfaces are arranged at the front end of the guide post and the end of the slider. n is an integer greater than or equal to 2; guide blocks are arranged on the outer periphery of the push rod, and guide grooves corresponding to the guide blocks are arranged on the sleeve; the refill is a ballpoint pen refill with a metal tube body. The normal writing state is that the tip of the refill protrudes outside the pen body for convenient writing; when the refill ejection state is required, press the refill on the paper, and the refill pops out, which is convenient for the user to pull out the refill, and then replace the refill or turn the refill around; when reinstalling, insert the refill into the refill cavity so that the end of the refill contacts the sliding claw sleeve.

2. The pressing type overvoltage protection electronic pen according to claim 1, characterized in that, A preloading spring is arranged in the refill cavity. A clamping portion for clamping the tail of the refill is arranged on the preloading spring. One end of the preloading spring is connected to the signal transmitting end on the control main board.

3. The pressing type overvoltage protection electronic pen according to claim 1, characterized in that, A guide tube for guiding the refill is arranged in the refill cavity, and the inner wall of the guide tube is insulated.

4. The pressing type overvoltage protection electronic pen according to claim 1, wherein A rubber cap is installed at the end of the refill.

5. The pressing type overvoltage protection electronic pen according to claim 1, characterized in that, A contact rod corresponding to the pressure sensor is arranged at the end of the end cap.

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