CN209946846U

CN209946846U - Electronic pen

Info

Publication number: CN209946846U
Application number: CN201920769804.6U
Authority: CN
Inventors: 吴振宇; 王宇辉
Original assignee: Beijing Kejia Touch Technology Co Ltd
Current assignee: Beijing Kejia Touch Technology Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-01-14
Anticipated expiration: 2029-05-27

Abstract

The utility model provides an electronic pen, which comprises a pen point and a pen point, wherein the pen point is arranged at the front end of a pen container, and a piston part, an elastic part and a pressure sensor are arranged inside the pen container; the pen point is characterized in that the top of the pen point is fixedly connected with the bottom of the piston part, the outer wall of the piston part is fixedly connected with the inner wall of the pen container, a pressure sensor is arranged above the piston part, an elastic part is connected between a pressure acquisition point of the pressure sensor and the top of the piston part, and the pen point can change the shrinkage or extension of the elastic part through the piston part under the action of external force or the self gravity of the pen point. The utility model is suitable for an enlarge pressure sensor's stroke in the electronic pen.

Description

Electronic pen

Technical Field

The application relates to intelligent electronic equipment, in particular to an electronic pen.

Background

With the improvement of the technological level and the quality of life, more and more intelligent devices appear in the daily work and life of people, and the touch device is one of the intelligent devices. People can directly operate on the display screen through the touch equipment without a mouse or other equipment for wired or wireless operation, and the operation is convenient and fast. Meanwhile, writing devices capable of writing on touch devices have also come into play. People can write on the touch device at will like using a pen by using the writing device.

In order to provide a better and more realistic writing effect for the user, various manufacturers have provided pressure sensors in the writing devices. The design of the pressure sensor can be used as a basis for judging whether writing occurs or not on one hand, and on the other hand, the thickness state of the handwriting can be changed through the pressure value acquired by the pressure sensor. Most of the existing pressure sensors adopt a capacitance or resistance change mode to collect pressure, and pressure collection points are arranged on the pressure sensors to contact with external objects. This requires that the pressure sensor have a high acquisition accuracy. However, the pressure sensor with high acquisition precision has relatively high production, purchase and maintenance costs, has certain pressure on developers and buyers, and is difficult to realize large-scale production and application.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above technical problems, the present invention provides an electronic pen.

The embodiment of the utility model provides an electronic pen, electronic pen includes nib and nib, the nib sets up the front end in the pen container, the pen container is inside to be provided with piston portion, elastomeric element and pressure sensor;

the pen point is characterized in that the top of the pen point is fixedly connected with the bottom of the piston part, the outer wall of the piston part is fixedly connected with the inner wall of the pen container, a pressure sensor is arranged above the piston part, an elastic part is connected between a pressure acquisition point of the pressure sensor and the top of the piston part, and the pen point can change the shrinkage or extension of the elastic part through the piston part under the action of external force or the self gravity of the pen point.

Preferably, the piston part comprises a buffer part and a connecting part, the outer wall of the buffer part is fixedly connected with the inner wall of the pen container, the bottom of the buffer part can move towards the inner direction of the buffer part or towards the outer direction of the buffer part under the pressure of the pen point or the gravity of the pen point, one end of the connecting part is connected with the elastic part, and the other end of the connecting part penetrates through the other end of the buffer part and penetrates through the top of the buffer part to reach the inside of the buffer part.

Preferably, the buffer part comprises a storage bin and a guide bin, the outer wall of the storage bin is fixedly connected with the inner wall of the pen container, the bottom of the storage bin is a movable part which can move towards the inside direction of the storage bin or towards the outside direction of the storage bin under the action of pressure of a pen point or gravity of the pen point, the side edge of the movable part is connected with the inner surface of the side wall of the storage bin in a sealing manner, viscous fluid substances are stored in the storage bin, a through hole is formed in the top of the storage bin, the guide bin is of a long-strip-shaped cavity structure, one end of the guide bin is communicated with the storage bin through the through hole, and the other end of the guide bin is provided with a through hole through which the connecting part can penetrate into the inside of the.

Preferably, the viscous fluid substance stored in the storage bin fills the inside of the storage bin and overflows into the guide bin.

Preferably, the storage bin is a rectangular bin body, a cylindrical bin body or a conical bin body.

Preferably, the connecting portion includes a connecting rod and a stress plate, wherein one end of the connecting rod is connected with the elastic component, the other end of the connecting rod penetrates through the top of the guide bin and extends into the guide bin, the stress plate is fixed at the bottom of the other end of the connecting rod, and the side wall of the stress plate is attached to the inner wall of the guide bin.

Preferably, a limiting part is arranged around the pressure acquisition point of the pressure sensor, the height of the limiting part is greater than the sum of the minimum length of the elastic component when the elastic component is compressed and the height of the pressure acquisition point, and the height of the limiting part is less than the sum of the natural length of the elastic component when the elastic component is not stretched and the height of the pressure acquisition point;

the top of connecting portion is provided with the limiting plate, the top surface of limiting plate can be in connecting portion move the in-process to pressure sensor with the bottom surface of spacing portion contacts.

Preferably, the limiting part comprises two vertical plates, the two vertical plates are symmetrically arranged on two sides of a pressure collecting point of the pressure sensor, and the distance between the two vertical plates is smaller than or equal to the width of the limiting plate on the top of the connecting part.

Preferably, the limiting part is of a barrel-shaped structure, the pressure acquisition point of the pressure sensor is located at the center of the limiting part, and the diameter of the limiting part is smaller than or equal to the width of the limiting plate at the top of the connecting part.

Preferably, the elastic member is plural, and the plural elastic members are connected in series between a pressure collecting point of the pressure sensor and a top of the piston portion.

The utility model has the advantages as follows: the utility model discloses a series connection elastomeric element on pressure sensor's pressure acquisition point to improve pressure sensor pressure acquisition's sensitivity. Through the transmission ability of piston portion, make the user use when the electronic pen writes, the nib can transmit pressure to elastomeric element department through piston portion, and then takes place pressure acquisition point to pressure sensor when deformation at elastomeric element and produce pressure. Due to the elastic performance of the elastic component, the stroke of the pressure sensor can be enlarged, the precision requirement on the pressure sensor is reduced, and the elastic pressure sensor has great advantage on cost saving.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of an electronic pen according to embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of the limiting portion 5-2 according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an electronic pen using the position-limiting portion 5-2 shown in FIG. 2;

fig. 4 is another schematic structural diagram of the limiting portion 5-2 according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of an electronic pen using the position-limiting portion 5-2 shown in FIG. 4;

fig. 6 is a schematic structural diagram of an electronic pen according to embodiment 2 of the present invention;

fig. 7 is a schematic structural view of the buffer portion 3-1 according to embodiment 2 of the present invention;

fig. 8 is a schematic structural diagram of a connecting portion 3-2 according to embodiment 2 of the present invention;

FIG. 9 is a schematic view of another structure of the electronic pen using the position-limiting portion 5-2 shown in FIG. 2;

FIG. 10 is a schematic view of another structure of the electronic pen using the position-limiting portion 5-2 shown in FIG. 4;

fig. 11 is another schematic structural diagram of the connecting portion 3-2 according to embodiment 2 of the present invention;

fig. 12 is another schematic structural view of the buffer portion 3-1 according to embodiment 2 of the present invention.

Reference numerals:

1. a pen container;

2. a pen point;

3. the device comprises a piston part, 3-1, a buffer part, 3-1-1, a storage bin, 3-1-2, a guide bin, 3-1-1-1, a movable part, 3-2, a connecting part, 3-2-1, a connecting rod, 3-2-2, a stress plate, 3-2-3 and a limiting plate;

4. an elastic member;

5. 5-1 parts of pressure sensor, 5-2 parts of pressure acquisition point and a limiting part.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Moreover, in order to provide a clearer description and easier understanding of the present application, the parts in the drawings are not drawn according to their relative dimensions, some dimensions have been exaggerated compared to other relevant dimensions; irrelevant details are not fully drawn for the sake of brevity.

Electronic pen for can write on the touch-sensitive screen intelligent electronic pen. The electronic pen comprises a pen point 2 and a pen container 1, wherein the pen point 2 is arranged at the front end of the pen container 1, and related electronic devices are arranged in the pen container 1, so that a user can realize operations such as writing or remote control on a touch screen through the electronic pen.

Except the structure and the function that present current electronic pen has, the electronic pen in the middle of still include pressure protection device, specifically, this pressure protection device is used for protecting pressure sensor 5 to avoid too big pressure to strike and cause the damage. The utility model provides a pressure protection device specifically includes: a piston portion 3 and an elastic member 4.

Example 1

As shown in fig. 1, the piston portion 3 is disposed inside the barrel 1 above the nib 2. The bottom of the piston part 3 is fixedly connected with the top of the pen point 2. The pressure sensor 5 is located above the piston portion 3, and a pressure collecting point 5-1 of the pressure sensor 5 is connected to the top of the piston portion 3 by an elastic member 4. In this case, the piston portion 3 corresponds to a transmission mechanism. When a user writes with the electronic pen, the pen tip 2 is forced by contact with a display of the touch device, so that the pen tip 2 moves toward the inside of the pen container 1. Since the piston portion 3 is fixed to the pen tip 2, the piston portion 3 also moves in the direction of the elastic member 4, and further compresses the elastic member 4. At this time, the pressure applied to the pen tip 2 is applied to the pressure sensor 5 through the piston portion 3 and the elastic member 4, and due to the existence of the elastic member 4, a part of the pressure transmitted from the pen tip 2 can be shared and buffered, and the pressure sensor 5 is effectively protected. In addition, due to the existence of the elastic component 4, the formation of the pressure sensor 5 is amplified, so that the acquisition effect realized by a high-precision pressure sensor can be realized by using a pressure sensor with lower precision. The pressure collecting point 5-1 collects the pressure transmitted by the elastic component 4, and then the handwriting state is adjusted correspondingly.

It should be noted that the pressure applied to the pen tip 2 is reduced by the piston portion 3 and the elastic member 4, and therefore, the pressure value acquired by the pressure sensor 5 is smaller than the pressure actually applied to the pen tip 2. The pressure changes need to be taken into account during the relevant adjustment of the writing state, so that they can be corrected or optimized in a software algorithm. The present embodiment provides only a structural solution for amplifying the stroke of the pressure sensor 5, and a detailed description of the subsequent pressure processing process is omitted.

In the present embodiment, the piston portion 3 may have a simple rod-like or columnar structure, and the purpose thereof is only to transmit the pressure applied to the pen tip 2 to the elastic member 4, and there is no excessive structural requirement.

In addition, in order to avoid excessive pressure at the pen tip 2, the piston portion 3 applies a large pressure to the pressure sensor 5 even after compressing the elastic member 4 to the minimum length. In the embodiment, on the basis of the structure of the existing pressure sensor 5, a limiting part 5-2 is arranged near a pressure acquisition point 5-1. As shown in fig. 2 and 4, the height of the position-limiting portion 5-2 is between the minimum length of the elastic member 4 that is compressed and the maximum length of the elastic member 4 that naturally hangs down, and the position of the position-limiting portion 5-2 ensures that the piston portion 3 abuts against the piston portion 3 during the movement of the piston portion 3 toward the pressure sensor 5 to prevent the piston portion 3 from continuing to move toward the pressure sensor 5. The specific height of the limiting part 5-2 can be determined according to the acquisition range of the pressure sensor 5 and the maximum pressure value to which the user is exposed at the pen point 2 when using the electronic pen. The maximum pressure value that the user receives at the pen tip 2 when using the electronic pen can also be obtained through experiments, and this embodiment is not specifically described.

Further, in order to save the internal space of the electronic pen and minimize the influence on the pressure acquisition of the pressure sensor 5. In this embodiment, the position-limiting part 5-2 may be configured as a circular ring or a cylindrical structure, and the pressure collecting point 5-1 of the pressure sensor 5 is disposed at the center of the circular ring or the cylindrical structure, as shown in fig. 2 and 3. Wherein, the diameter of the limiting part 5-2 is smaller than the width of the top of the piston part 3, so that the limiting part 5-2 can block the movement of the piston part 3. The stopper portion 5-2 may be provided in the form of two standing plates. The two vertical plates are respectively erected at the left side and the right side of the pressure acquisition point 5-1, as shown in fig. 4 and 5. Similarly, the distance between the two vertical plates is smaller than the width of the top of the piston portion 3, so that the vertical plates can block the movement of the piston portion 3.

In addition, a plurality of elastic members 4 may be provided according to actual application scenarios and the specific situation of the pressure applied to the pen tip 2, and the plurality of elastic members 4 are connected in series between the piston portion 3 and the pressure sensor 5. The elastic member 4 may be a spring or other device having elastic properties.

Example 2

As shown in fig. 6, the piston portion 3 is disposed inside the barrel 1 above the nib 2. The bottom of the piston part 3 is fixedly connected with the top of the pen point 2, and the outer wall of the piston part 3 is fixedly connected with the inner wall of the pen container 1. The pressure sensor 5 is located above the piston portion 3, and a pressure collecting point 5-1 of the pressure sensor 5 is connected to the top of the piston portion 3 by an elastic member 4. In this case, the piston portion 3 corresponds to a transmission mechanism. When a user writes with the electronic pen, the pen tip 2 is forced by contact with a display of the touch device, so that the pen tip 2 moves toward the inside of the pen container 1. Since the piston portion 3 is fixed to the pen tip 2, the piston portion 3 also moves in the direction of the elastic member 4, and further compresses the elastic member 4. At this time, the pressure applied to the pen tip 2 is applied to the pressure sensor 5 through the piston portion 3 and the elastic member 4, and due to the existence of the elastic member 4, a part of the pressure transmitted from the pen tip 2 can be shared and buffered, and the pressure sensor 5 is effectively protected. In addition, due to the existence of the elastic component 4, the formation of the pressure sensor 5 is amplified, so that the acquisition effect realized by a high-precision pressure sensor can be realized by using a pressure sensor with lower precision. The pressure collecting point 5-1 collects the pressure transmitted by the elastic component 4, and then the handwriting state is adjusted correspondingly.

In the present embodiment, the piston portion 3 is funnel-shaped as a whole. Specifically, the piston portion 3 includes a cushioning portion 3-1 and a connecting portion 3-2. One end of the connecting part 3-2 is connected with the elastic part 4, and the other end of the connecting part 3-2 is inserted into the buffer part 3-1 and can be contacted with the bottom of the buffer part 3-1. The outer wall of the buffer part 3-1 is fixedly connected with the inner wall of the pen container 1, and the bottom of the buffer part 3-1 can move towards the inner direction of the buffer part 3-1 or towards the outer direction of the buffer part 3-1 under the pressure of the pen point 2 or the gravity of the pen point 2, so that the connecting part 3-2 is pushed to move up and down in the buffer part 3-1. The cushioning portion 3-1 and the connecting portion 3-2 work together so that the piston portion 3 as a whole operates like a single piston.

Further, in the present embodiment, as shown in fig. 7, the buffer portion 3-1 includes a storage bin 3-1-1 and a guide bin 3-1-2. The storage bin 3-1-1 is a hollow bin body, and the outer wall of the storage bin 3-1-1 is fixedly connected with the inner wall of the pen container 1. Viscous fluid substances are stored in the storage silo 3-1-1. The bottom of the storage bin 3-1-1 is provided with a movable part 3-1-1-1 which can move towards the inner direction of the storage bin 3-1-1 or towards the outer direction of the storage bin 3-1-1 under the pressure of the pen point 2 or the gravity of the pen point 2. The movable part 3-1-1-1 can be a movable plate which can move in the storage bin 3-1-1 or a film layer which is soft in texture but tough.

The guide bin 3-1-2 is a strip-shaped cavity structure, and the top of the storage bin 3-1-1 is provided with a through hole. One end of the guide bin 3-1-2 can communicate with the storage bin 3-1-1 through the through hole. The other end of the guide bin 3-1-2 can be used for the connecting part 3-2 to penetrate into the guide bin 3-1-2.

In this embodiment, the connecting portion 3-2 can be extended directly into the storage bin 3-1-1 through the guiding bin 3-1-2, and can be retained in the guiding bin 3-1-2 by the support of the viscous fluid substance in the storage bin 3-1-1. In the case of the connection part 3-2 penetrating directly into the storage bin 3-1-1, the connection part 3-2 may reach directly to the bottom of the storage bin 3-1-1. The connecting part 3-2 is driven to move up and down in the storage bin 3-1-1 by the movement of the bottom of the storage bin 3-1-1. In the case where the connection portion 3-2 stays in the guide chamber 3-1-2 by being supported by the viscous fluid substance in the storage chamber 3-1-1, the present embodiment is designed as follows:

the cross-sectional area of the storage bin 3-1-1 is larger than that of the guide bin 3-1-2, and the viscous fluid substance in the storage bin 3-1-1 is ensured to fill the storage bin 3-1-1 and overflow into the guide bin 3-1-2. The viscous fluid substance can be in a liquid or solid form, and only the nib 2 needs to be enabled to change in shape when being subjected to pressure, and the supporting connecting part 3-2 is located on the top surface of the viscous fluid substance. Thus, when the pen tip 2 contacts the touch device, the pen tip 2 lifts the top surface of the viscous fluid substance through the bottom of the storage chamber 3-1-1, and the support connection part 3-2 compresses the elastic part 4, and then the pressure sensor 5 collects the pressure transmitted by the elastic part 4.

In this process, since the cross-sectional area of the guide chamber 3-1-2 is smaller than that of the reservoir chamber 3-1-1, when the viscous fluid substance in the reservoir chamber 3-1-1 is influenced by the pressure of the nib 2, only a slight change occurs, but the top surface of the viscous fluid substance rises significantly for the viscous fluid substance overflowing the guide chamber 3-1-2. The pressure sensor 5 can also sensitively collect the pressure transmitted by the elastic component 4, and the influence on the pressure collection is very small.

In order to support the connecting portion 3-2 on the top surface of the viscous fluid material more stably, the mass distribution of the connecting portion 3-2 itself and the contact surface with the viscous fluid material need to be designed. As shown in fig. 8, the connecting portion 3-2 of the present embodiment is an elongated structure, and includes two portions, i.e., a connecting rod 3-2-1 and a force-bearing plate 3-2-2. The top of the connecting rod 3-2-1 is connected with an elastic part 4, and the bottom of the connecting rod 3-2-1 is fixedly connected with the stress plate 3-2-2. The bottom surface of the stress plate 3-2-2 is attached to the top surface of the viscous fluid substance, and the side surface of the stress plate 3-2-2 is attached to the inner wall of the guide bin 3-1-2. In order to make the connecting part 3-2 move up and down in the guiding bin 3-1-2 smoothly, the side surface of the stress plate 3-2-2 and the inner wall of the guiding bin 3-1-2 are required to be as smooth as possible, so that the friction force between the two is as small as possible.

In addition, in order to avoid excessive pressure at the pen tip 2, the piston portion 3 applies a large pressure to the pressure sensor 5 even after compressing the elastic member 4 to the minimum length. In the embodiment, on the basis of the structure of the existing pressure sensor 5, a limiting part 5-2 is arranged near a pressure acquisition point 5-1, as shown in fig. 9 and 10. The height of the limiting part 5-2 is between the minimum length of the elastic component 4 which is compressed and the maximum length of the elastic component 4 which naturally hangs down, and the setting position of the limiting part 5-2 can ensure that the connecting part 3-2 is propped against the connecting part 3-2 in the process of moving towards the direction of the pressure sensor 5 so as to prevent the connecting part 3-2 from continuously moving towards the direction of the pressure sensor 5. The specific height of the limiting part 5-2 can be determined according to the acquisition range of the pressure sensor 5 and the maximum pressure value to which the user is exposed at the pen point 2 when using the electronic pen. The maximum pressure value that the user receives when using the electronic pen may also be obtained through experiments, and this embodiment is not specifically described.

Since the cross-sectional area of the top of the connecting portion 3-2 is small relative to the cross-sectional area of the pressure sensor 5 in this embodiment. In order to make the position restricting portion 5-2 interfere with the top of the connecting portion 3-2, the present embodiment provides a position restricting portion 3-2-3 on the top of the connecting rod 3-2-1 of the connecting portion 3-2, as shown in fig. 11. The cross-sectional area of the limiting plate 3-2-3 is larger than that of the limiting part 5-2.

In particular, in order to save the internal space of the electronic pen and reduce the influence on the pressure acquisition of the pressure sensor 5 as much as possible, the upward movement of the connecting part 3-2 can be limited. In this embodiment, the limiting portion 5-2 may be configured as a circular ring or a cylindrical structure, and the pressure collecting point 5-1 of the pressure sensor 5 is disposed at the center of the circular ring or the cylindrical structure. As shown in fig. 2 and 9. Wherein, the diameter of the limiting part 5-2 is smaller than the width of the connecting plate, so that the limiting part 5-2 can block the movement of the connecting part 3-2. The stopper portion 5-2 may be provided in the form of two standing plates. The two vertical plates are respectively erected at the left side and the right side of the pressure acquisition point 5-1, as shown in fig. 4 and 10. Similarly, the distance between the two vertical plates is smaller than the width of the connecting plate, so that the vertical plates can block the movement of the connecting part 3-2.

In addition, in this embodiment, the storage bin 3-1-1 can be a rectangular bin body, a cylindrical bin body or a conical bin body. Can be determined according to the internal space of the electronic pen container 1 and the position relationship with other electronic components. The rectangular bin body is convenient to assemble; the cylindrical bin body is convenient to process. Fig. 12 shows a schematic structural view of the storage bin 3-1-1 which is a conical bin body. The conical bin body occupies small space, and the change states of viscous fluid substances in the storage bin 3-1-1 and the guide bin 3-1-2 are obvious.

In addition, a plurality of elastic members 4 may be provided according to actual application scenarios and specific situations of pressure applied to the pen tip 2, and the plurality of elastic members 4 may be connected in series between the piston portion 3 and the pressure sensor 5. The elastic member 4 may be a spring or other device having elastic properties.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An electronic pen comprises a pen point and a pen container, wherein the pen point is arranged at the front end of the pen container;

2. The electronic pen according to claim 1, wherein the piston part includes a buffer part and a connecting part, an outer wall of the buffer part is fixedly connected with an inner wall of the pen barrel, a bottom of the buffer part is movable toward an inside of the buffer part or toward an outside of the buffer part under a pressure of the pen tip or a gravity of the pen tip, one end of the connecting part is connected with the elastic member, and the other end of the connecting part penetrates through a top of the buffer part to reach an inside of the buffer part.

3. The electronic pen as claimed in claim 2, wherein the buffer portion comprises a storage chamber and a guiding chamber, the outer wall of the storage chamber is fixedly connected with the inner wall of the pen container, the bottom of the storage chamber is a movable portion which can move towards the inside of the storage chamber or towards the outside of the storage chamber under the pressure of a pen point or the gravity of the pen point, the side edge of the movable portion is hermetically connected with the inner surface of the side wall of the storage chamber, viscous fluid substances are stored in the storage chamber, the top of the storage chamber is provided with a through hole, the guiding chamber is in a long strip-shaped cavity structure, one end of the guiding chamber is communicated with the storage chamber through the through hole, and the other end of the guiding chamber is provided with a through hole through which the connecting portion can penetrate into the guiding chamber.

4. The electronic pen as claimed in claim 3, wherein viscous fluid substance stored in the reservoir fills the interior of the reservoir and overflows into the guide chamber.

5. The electronic pen according to claim 3 or 4, wherein the storage bin is a rectangular bin body, a cylindrical bin body or a conical bin body.

6. The electronic pen according to claim 3 or 4, wherein the connecting portion comprises a connecting rod and a stress plate, wherein one end of the connecting rod is connected with an elastic component, the other end of the connecting rod penetrates through the top of the guide bin to reach the interior of the guide bin, the stress plate is fixed at the bottom of the other end of the connecting rod, and the side wall of the stress plate is attached to the inner wall of the guide bin.

7. The electronic pen according to claim 6, wherein a stopper is provided around the pressure collection point of the pressure sensor, the height of the stopper is greater than the sum of the minimum length of the elastic member when compressed and the height of the pressure collection point, and the height of the stopper is less than the sum of the natural length of the elastic member when unstretched and the height of the pressure collection point;

8. The electronic pen according to claim 7, wherein the limiting portion comprises two vertical plates, the two vertical plates are symmetrically arranged on two sides of a pressure collecting point of the pressure sensor, and a distance between the two vertical plates is smaller than or equal to a width of the limiting plate on the top of the connecting portion.

9. The electronic pen according to claim 8, wherein the limiting part is a barrel-shaped structure, the pressure collecting point of the pressure sensor is located at the center of the limiting part, and the diameter of the limiting part is smaller than or equal to the width of the limiting plate at the top of the connecting part.

10. The electronic pen of claim 1, wherein the elastic member is plural, and the plural elastic members are connected in series between a pressure collecting point of the pressure sensor and a top of the piston portion.