Stylus, and pressure detection method for stylus

Abstract

Provided are a stylus and a pressure detection method for a stylus. The stylus comprises: a housing (10), which has an accommodating cavity (11); a tip (12), which comprises a first tip portion (121) located in the accommodating cavity (11) and a second tip portion (122) extending from the accommodating cavity (11) to the outside of the shell (10), the end of the second tip portion (122) away from the accommodating cavity (11) being used for writing; a first pressure detection structure (13), which is located in the accommodating cavity (11) and is connected to the end of the first tip portion (121) away from the second tip portion (122); and a second pressure detection structure (14), which is located in the accommodating cavity (11) and is connected to the end of the first tip portion (121) away from the second tip portion (122), wherein the measurement range of the first pressure detection structure (13) is greater than a first preset value and less than a second preset value, and the measurement range of the second pressure detection structure (14) is greater than a third preset value and less than a fourth preset value, the third preset value being less than the first preset value, and the fourth preset value being not less than the first preset value.

Description

Stylus pen and pressure detection method for stylus pen

[0001] Cross-references

[0002] The present disclosure claims priority to Chinese patent application number 202410315444.8, entitled “STYLE PEN AND PRESSURE DETECTION METHOD FOR STYLE PEN,” filed on March 19, 2024, which is incorporated herein by reference in its entirety. Technical Field

[0003] The embodiments of the present disclosure relate to the technical field of electronic devices, and more particularly to a stylus pen and a pressure detection method for the stylus pen. Background Art

[0004] A stylus pen is a commonly used tool in a touch-type mobile terminal, and is used to facilitate users to write on the display screen of the touch-type mobile terminal.

[0005] Styluses include pressure-sensitive and non-pressure-sensitive types. Pressure-sensitive styluses have a writing pressure sensing function. When the user's writing force increases, the lines on the screen will automatically become thicker. When the user's writing force decreases, the handwriting on the screen will automatically become thinner, making the user's writing experience closer to the writing effect on paper. Therefore, it is widely welcomed. At present, the accuracy of stylus tip pressure detection needs to be improved.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a stylus and a method for detecting pressure of the stylus. The embodiments of the present application provide a stylus and a method for detecting pressure of the stylus, which at least help to improve the accuracy of stylus pressure detection.

[0008] On the one hand, an embodiment of the present application provides a stylus pen, comprising: a shell, the shell having a accommodating cavity; a pen tip, the pen tip comprising a first pen tip portion located in the accommodating cavity and a second pen tip portion extending from the accommodating cavity to the outside of the shell, the second pen tip portion being away from the accommodating cavity and used for writing; a first pressure detection structure, the first pressure detection structure being located in the accommodating cavity, and the first pressure detection structure being connected to the end of the first pen tip portion away from the second pen tip portion; a second pressure detection structure, the second pressure detection structure being located in the accommodating cavity, and the second pressure detection structure being connected to the end of the first pen tip portion away from the second pen tip portion; wherein, the range of the first pressure detection structure is greater than a first preset value and less than a second preset value, the range of the second pressure detection structure is greater than a third preset value and less than a fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value.

[0009] In some embodiments, the difference between the second preset value and the first preset value is greater than the difference between the fourth preset value and the third preset value.

[0010] In some embodiments, the stylus pen further includes a detection circuit, which is disposed in the accommodating cavity, and the first pressure detection structure and the second pressure detection structure are both connected to the detection circuit.

[0011] In some embodiments, the second pressure detection structure includes: a connecting portion, which is connected to the end of the first pen tip portion away from the second pen tip portion; a base located on the side of the connecting portion away from the pen tip, the base and the connecting portion are arranged opposite to each other, and there is a spacing area between the base and the connecting portion; a limiting portion, which is located on the surface of the connecting portion close to the base, or on the surface of the base close to the connecting portion; wherein, when the pressure on the end of the second pen tip portion away from the accommodating cavity is less than a fourth preset value, the limiting portion contacts one of the base and the connecting portion, and when the pressure on the end of the second pen tip portion away from the accommodating cavity is greater than the fourth preset value, the opposite sides of the limiting portion contact the base and the connecting portion respectively in the direction along the connection portion pointing to the base.

[0012] In some embodiments, the connecting portion is a magnetic conductive sheet, and the second pressure detection structure further includes: a coil, the coil is located on the surface of the base close to the connecting portion, the axial direction of the coil is parallel to the direction of the connecting portion pointing to the base, and the length of the coil along the direction of the connecting portion pointing to the base is less than the length of the limiting portion; a first spring, the first end of the first spring is fixed to the connecting portion, and the second end of the first spring is fixed to the base; a second spring, the first end of the second spring is fixed to the connecting portion, and the second end of the second spring is fixed to the base; wherein, along the direction perpendicular to the connecting portion pointing to the base, the first spring and the second spring are respectively located on opposite sides of the coil.

[0013] In some embodiments, the orthographic projection of the coil on the base surrounds the orthographic projection of the limiting portion on the base.

[0014] In some embodiments, the second pressure detection structure includes: a first electrode plate tube, the first electrode plate tube is fixed to the surface of the base facing the connecting part, and the axial direction of the first electrode plate tube is parallel to the direction of the connecting part pointing to the base; a pole, the pole is fixed to the surface of the connecting part facing the base, the axial direction of the pole is parallel to the axial direction of the first electrode plate tube, and the positive projection of the first electrode plate tube on the base surrounds the positive projection of the pole on the base; a first spring, the first end of the first spring is fixed to the connecting part, and the second end of the first spring is fixed to the base; a second spring, the first end of the second spring is fixed to the connecting part, and the second end of the second spring is fixed to the base; wherein, along the direction perpendicular to the connecting part pointing to the base, the first spring and the second spring are respectively located on opposite sides of the first electrode plate tube, and along the direction of the connecting part pointing to the base, the length of the limiting part is greater than the length of the first electrode plate tube.

[0015] In some embodiments, the pole includes a limiting portion and a second pole plate tube sleeved on an outer ring of the limiting portion. In the direction from the connecting portion to the base, the length of the limiting portion is greater than the length of the second pole plate tube.

[0016] In some embodiments, the limiting portion includes a first limiting block and a second limiting block, and the second pressure detection structure includes: a silicone portion and a thin film pressure sensor distributed in sequence along the direction of the connecting portion pointing to the base; along the direction of the connecting portion pointing to the base, the silicone portion has a first end and a second end relative to each other, and the thin film pressure sensor has a first end and a second end relative to each other, the first end of the silicone portion is fixed to the connecting portion, the second end of the silicone portion is fixed to the first end of the thin film pressure sensor, and the second end of the thin film pressure sensor is fixed to the base, and the first limiting block and the second limiting block are respectively located on opposite sides of the silicone portion.

[0017] On the other hand, an embodiment of the present application further provides a method for detecting pressure of a stylus, comprising: providing a stylus as described in any one of the above embodiments, the stylus comprising: a shell having a receiving chamber; a pen tip, the pen tip comprising a first pen tip portion located in the receiving chamber and a second pen tip portion extending from the receiving chamber to the outside of the shell, the second pen tip portion being away from the receiving chamber at one end for writing; a first pressure detecting structure, the first pressure detecting structure being located in the receiving chamber and connected to an end of the first pen tip portion away from the second pen tip portion; a second pressure detecting structure, the second pressure detecting structure being located in the receiving chamber and the second pressure detecting structure being connected to an end of the first pen tip portion away from the second pen tip portion; The force detection structure is connected to the end of the first pen tip away from the second pen tip; wherein, the range of the first pressure detection structure is greater than the first preset value and less than the second preset value, the range of the second pressure detection structure is greater than the third preset value and less than the fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value; when the pressure on the end of the second pen tip away from the accommodating cavity is less than the fourth preset value, the pen tip pressure detected by the second pressure detection structure is obtained, and when the pressure on the end of the second pen tip away from the accommodating cavity is greater than or equal to the fourth preset value, the pen tip pressure detected by the first pressure detection structure is obtained.

[0018] The technical solution of the stylus pen provided in the embodiment of the present application has at least the following advantages: the stylus pen includes a shell and a pen tip arranged at one end of the shell, the pen tip includes a first pen tip portion and a second pen tip portion, wherein the first pen tip portion is located in a accommodating cavity of the shell, the second pen tip portion extends from the accommodating cavity to the outside of the shell, the end of the second pen tip portion away from the first pen tip portion is used for writing, the end of the first pen tip portion away from the second pen tip portion is connected to a pressure detection structure, the pressure detection structure is used to detect the pressure exerted on the end of the second pen tip portion used for writing, and according to the pressure value detected by the pressure detection structure, light pressure can be used to draw thin lines, and heavy pressure can be used to draw thick lines. The pressure detection structure includes: a first pressure detection structure and a second pressure detection structure. The range of the first pressure detection structure is greater than the first preset value and less than the second preset value, the range of the second pressure detection structure is greater than the third preset value and less than the fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value. That is to say, the range of the first pressure detection structure is suitable for detecting a larger pressure, and the range of the second pressure detection structure is suitable for detecting a smaller pressure. In this way, the detection of a larger pressure is separated from the detection of a smaller pressure. While improving the detection sensitivity of the pressure detection structure to a smaller pressure, it is beneficial to ensure that the pressure detection structure has a larger range, so that the pressure detection of the stylus pen takes into account both high precision and a large range, which is beneficial to improving the accuracy of the stylus pen pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without making any creative work.

[0020] FIG1 is a schematic structural diagram of a stylus provided by the related art;

[0021] FIG2 is a schematic structural diagram of a stylus provided in an embodiment of the present application;

[0022] FIG3 is a schematic diagram of a measuring range of a first pressure detection structure and a measuring range of a second pressure detection structure of a stylus provided in an embodiment of the present application;

[0023] FIG4 is a schematic structural diagram of another stylus provided in an embodiment of the present application;

[0024] FIG5 is a schematic diagram of a partial structure of a stylus provided in an embodiment of the present application;

[0025] FIG6 is a schematic diagram of a partial structure of another stylus provided in an embodiment of the present application;

[0026] FIG7 is a schematic diagram of a partial structure of another stylus provided in an embodiment of the present application;

[0027] FIG8 is a schematic structural diagram of a second pressure detection structure of a stylus provided in an embodiment of the present application;

[0028] FIG9 is a schematic structural diagram of a second pressure detection structure of a stylus provided in an embodiment of the present application under a force condition;

[0029] FIG10 is a schematic structural diagram of a second pressure detection structure of a stylus provided by an embodiment of the present application under another force condition;

[0030] FIG11 is a schematic structural diagram of another second pressure detection structure of a stylus provided in an embodiment of the present application;

[0031] FIG12 is a schematic structural diagram of yet another second pressure detection structure of a stylus provided in an embodiment of the present application;

[0032] FIG13 is a schematic orthographic projection diagram of a portion of the second pressure detection structure provided in FIG12 on the base;

[0033] FIG14 is a schematic structural diagram of yet another second pressure detection structure of a stylus provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] As can be seen from the background art, the accuracy of pen tip pressure detection by current styluses needs to be improved.

[0035] For pressure-sensitive styluses, there is usually a requirement for zero pressure detection. The zero pressure detection requirement does not mean true zero pressure, but rather simulates the situation where a gel pen can produce ink as soon as it touches the paper. Therefore, zero pressure detection requires the stylus's pressure sensor to have high sensitivity.

[0036] FIG1 is a schematic structural diagram of a touch pen provided by the related art.

[0037] Referring to Figure 1, a conventional stylus includes a tip 1 and a pressure sensor 2 positioned behind the tip 1. Pressure sensor 2 is used to detect pressure applied to the tip 1. To ensure a sufficiently wide pressure detection range for the tip 1, the sensitivity of pressure sensor 2 is typically not very high. A pressure sensor 2 with a low sensitivity cannot meet the requirement for zero pressure detection. If a pressure sensor 2 with a high sensitivity is selected to meet this requirement, the dynamic range of pressure detection is reduced. High pressure applied to the tip 1 may exceed the measuring range of pressure sensor 2, potentially even damaging it. Therefore, stylus pressure sensors 2 typically cannot achieve both high precision and a wide range.

[0038] Embodiments of the present application provide a stylus and a method for detecting pressure using the stylus. The pressure detection structure of the stylus includes: a first pressure detection structure and a second pressure detection structure. The range of the first pressure detection structure is greater than a first preset value and less than a second preset value; the range of the second pressure detection structure is greater than a third preset value and less than a fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value. In other words, the range of the first pressure detection structure is suitable for detecting relatively high pressures, and the range of the second pressure detection structure is suitable for detecting relatively low pressures. In this way, the detection of relatively high pressures is separated from the detection of relatively low pressures. This improves the detection sensitivity of the pressure detection structure to relatively low pressures while facilitating the pressure detection structure to have a relatively large range. Therefore, the pressure detection structure of the stylus not only meets the requirement of zero pressure detection but also ensures a relatively large pressure detection range, thus achieving both high precision and a large range, thereby improving the accuracy of pressure detection by the stylus.

[0039] The following detailed description of the various embodiments of the present disclosure is provided in conjunction with the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in the various embodiments of the present disclosure to facilitate a better understanding of the embodiments of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the embodiments of the present application can be implemented.

[0040] FIG2 is a schematic structural diagram of a stylus provided in an embodiment of the present application.

[0041] 2 , the stylus pen includes: a housing 10 having a receiving chamber 11; a nib 12 including a first nib portion 121 located within the receiving chamber 11 and a second nib portion 122 extending from the receiving chamber 11 to the outside of the housing 10, wherein an end of the second nib portion 122 away from the receiving chamber 11 is used for writing; a first pressure detecting structure 13 located within the receiving chamber 11 and connected to an end of the first nib portion 121 away from the second nib portion 122; and a second pressure detecting structure 14 located within the receiving chamber 11 and connected to an end of the first nib portion 121 away from the second nib portion 122. A measuring range of the first pressure detecting structure 13 is greater than a first preset value and less than a second preset value, and a measuring range of the second pressure detecting structure 14 is greater than a third preset value and less than a fourth preset value, wherein the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value.

[0042] The embodiment of the present application adds a highly sensitive second pressure detection structure 14 on the basis of a conventional first pressure detection structure 13 with a large range. When the pressure on the force-bearing end of the second pen tip 122 is relatively small, pressure detection data of the highly sensitive second pressure detection structure 14 is obtained, thereby improving the accuracy of zero pressure detection of the stylus. On this basis, in conjunction with the first pressure detection structure 13 with a large range, when the pressure on the force-bearing end of the second pen tip 122 is relatively large, pressure detection data of the first pressure detection structure 13 with a large range is obtained. In this way, the pressure detection structure of the stylus takes into account both high precision and a large range, which is beneficial to improving the accuracy of pressure detection of the stylus and improving the performance of the stylus.

[0043] It should be noted that the end of the second nib portion 122 away from the first nib portion 121 is the writing end, which is also the force-bearing end of the nib 12. When the pressure on the force-bearing end of the nib 12 is less than the fourth preset value, the pressure on the force-bearing end of the nib 12 falls within the measuring range of the second pressure detection structure 14, which means that the pressure on the nib 12 is relatively small; when the pressure on the force-bearing end of the nib 12 is greater than or equal to the fourth preset value and less than the second preset value, the pressure on the force-bearing end of the nib 12 falls within the measuring range of the first pressure detection structure 13, which means that the pressure on the nib 12 is relatively large.

[0044] FIG3 is a schematic diagram of a measuring range of a first pressure detection structure and a measuring range of a second pressure detection structure of a stylus provided in an embodiment of the present application.

[0045] Referring to FIG3 , the measuring range of the first pressure detection structure 13 is defined as a first range, which is greater than or equal to a first preset value A and less than a second preset value B. The measuring range of the second pressure detection structure 14 is defined as a second range, which is greater than a third preset value C and less than a fourth preset value D. The third preset value C can be zero or close to zero. The specific values ​​of the first preset value A, the second preset value B, and the fourth preset value D can be determined based on the performance of the first pressure detection structure 13 and the second pressure detection structure 14, as long as the second range of the second pressure detection structure 14 meets the accuracy requirements for zero pressure detection and the first range of the first pressure detection structure 13 meets the wide-range pressure detection requirements of the stylus.

[0046] The fourth preset value D is not less than the first preset value A. In this way, the first range and the second range have overlapping detection ranges, thereby preventing the pressure detection structure from being unable to detect a certain amount of pressure, or being unable to detect pressure within a certain range. This eliminates detection blind spots and helps avoid pressure detection failures of the stylus.

[0047] In some embodiments, referring to FIG3 , the difference between the second preset value B and the first preset value A is greater than the difference between the fourth preset value D and the third preset value C. In other words, the detection range of the first range is greater than the detection range of the second range. Thus, the first pressure detection structure 13 ensures a sufficiently large dynamic range for pressure detection, which is beneficial for improving the performance of the stylus.

[0048] 2 , the housing 10 is the outer shell of the stylus pen, and the accommodating cavity 11 is used to install the stylus pen component. The accommodating cavity 11 is communicated with the outside of the housing 10 through an opening on the housing 10 .

[0049] It should be noted that the structural diagram of the stylus pen shown in FIG2 is a structural diagram of the stylus pen tip 12 in a state without any force.

[0050] Continuing with Figure 2 , the pen tip 12 extends from the housing 10 through the accommodating cavity 11. The pen tip 12 comprises a first nib portion 121 and a second nib portion 122. The end of the first nib portion 121, distal from the second nib portion 122, is connected to a pressure detection mechanism to transmit pressure applied to the writing end of the second nib portion 122 to the pressure detection mechanism. Under load, the pen tip 12 can move relative to the housing 10 in a direction from the nib 12 toward the accommodating cavity 11.

[0051] The pressure detection structure is located in the accommodating cavity 11 and is used to detect the pressure on the end of the second pen tip 122 away from the first pen tip 121. According to the pressure value detected by the pressure detection structure, light pressure can be used to draw thin lines, and heavy pressure can be used to draw thick lines.

[0052] The pressure detection structure includes a first pressure detection structure 13 with a larger measuring range and a second pressure detection structure 14 with higher sensitivity. The first pressure detection structure 13 and the second pressure detection structure 14 are both connected to an end of the first pen tip 121 away from the second pen tip 122.

[0053] In some embodiments, the first pressure detection structure and the second pressure detection structure may both be directly connected to the pen tip. In other embodiments, the first pressure detection structure may be connected to the pen tip via a first connector, and the second pressure detection structure may be connected to the pen tip via a second connector. In other embodiments, one of the first pressure detection structure and the second pressure detection structure may be directly connected to the pen tip, and the other of the first pressure detection structure and the second pressure detection structure may be connected to the pen tip via a connector.

[0054] 2 , in some embodiments, the first pressure detecting structure 13 and the second pressure detecting structure 14 are arranged sequentially in a direction away from the pen tip 12, with the first pressure detecting structure 13 disposed proximate to the pen tip 12 and the second pressure detecting structure 14 located on a side of the first pressure detecting structure 13 away from the pen tip 12. It will be appreciated that in other embodiments, the second pressure detecting structure 14 and the first pressure detecting structure 13 are arranged sequentially in a direction away from the pen tip 12, with the second pressure detecting structure 14 disposed proximate to the pen tip 12 and the first pressure detecting structure 13 located on a side of the second pressure detecting structure 14 away from the pen tip 12.

[0055] Figure 4 is a schematic diagram of the structure of another stylus provided by an embodiment of the present application. The schematic diagram of the structure of the stylus shown in Figure 4 is a schematic diagram of the structure of the stylus when the pen tip is not under force.

[0056] 4 , in some embodiments, the first pressure detecting structure 13 and the second pressure detecting structure 14 may also be arranged in a direction perpendicular to the first nib portion 121 and pointing toward the second nib portion 122 .

[0057] The embodiment of the present application does not limit the position and arrangement of the first pressure detection structure 13 and the second pressure detection structure 14 .

[0058] In some embodiments, referring to FIG. 2 or FIG. 4 , the stylus pen further includes a detection circuit 15, which is disposed within the accommodating cavity 11 and to which the first pressure detection structure 13 and the second pressure detection structure 14 are connected. The detection circuit 15 is configured to receive first pressure data detected by the first pressure detection structure 13 and second pressure data detected by the second pressure detection structure 14, and to generate a pressure signal based on the first pressure data or the second pressure data.

[0059] In some embodiments, the detection circuit 15 may include a control module and a communication module. The control module is used to generate a pressure signal based on the first pressure data or the second pressure data, and the communication module is used to send the pressure signal to a signal processing module of the electronic screen where the stylus is written, thereby realizing light pressure to draw thin lines and heavy pressure to draw thick lines on the electronic screen.

[0060] Figure 5 is a schematic diagram of the partial structure of a stylus provided in an embodiment of the present application; Figure 6 is a schematic diagram of the partial structure of another stylus provided in an embodiment of the present application; and Figure 7 is a schematic diagram of the partial structure of yet another stylus provided in an embodiment of the present application.

[0061] Referring to Figure 2, and in combination with Figure 5, Figure 6 or Figure 7, in some embodiments, the second pressure detection structure 14 includes: a connecting portion 110, the connecting portion 110 is connected to the end of the first pen tip portion 121 away from the second pen tip portion 122; a base 120 located on the side of the connecting portion 110 away from the pen tip 12, the base 120 and the connecting portion 110 are arranged opposite to each other, and there is a spacing area between the base 120 and the connecting portion 110.

[0062] Specifically, the connecting portion 110 is used to connect with the pen tip 12, the base 120 and the housing 10 of the stylus are fixed, the base 120 and the connecting portion 110 are arranged opposite to each other, and there is a spacing area between the base 120 and the connecting portion 110. When the pen tip 12 is subjected to pressure, in the direction along the connecting portion 110 pointing to the base 120, if the spacing distance between the base 120 and the connecting portion 110 is defined as a first dimension, and the spacing distance between the base 120 and the connecting portion 110 when the pen tip 12 is not under force is defined as a second dimension, the first dimension is smaller than the second dimension, and the difference between the second dimension and the first dimension is related to the magnitude of the pressure applied to the pen tip 12. The greater the pressure applied to the pen tip 12, the greater the difference between the second dimension and the first dimension. In this way, the magnitude of the force applied to the pen tip 12 can be judged based on the difference between the second dimension and the first dimension.

[0063] With reference to FIG2 , and in combination with FIG5 , FIG6 , or FIG7 , in some embodiments, the second pressure detection structure 14 further includes a stopper 130. In some examples, with reference to FIG5 or FIG7 , the stopper 130 is located on a surface of the connecting portion 110 close to the base 120. In other examples, with reference to FIG6 , the stopper 130 is located on a surface of the base 120 close to the connecting portion 110.

[0064] When the pressure applied to the end of the second nib portion 122 away from the accommodating cavity 11 is less than a fourth preset value, the limiting portion 130 contacts one of the base 120 and the connecting portion 110. When the pressure applied to the end of the second nib portion 122 away from the accommodating cavity 11 is greater than or equal to the fourth preset value, the limiting portion 130 contacts the base 120 and the connecting portion 110 on opposite sides thereof, respectively, in the direction from the connecting portion 110 toward the base 120. The limiting portion 130 protects the second pressure detection structure 14 and prevents damage to the second pressure detection structure 14 when the pressure applied to the nib 12 exceeds the second range.

[0065] In some embodiments, referring to FIG2 and in combination with FIG5 or FIG6 , the connecting portion 110 is directly connected to the end of the first nib portion 121 away from the second nib portion 122. In other embodiments, referring to FIG2 and in combination with FIG7 , the connecting portion 110 may be connected to the end of the first nib portion 121 away from the second nib portion 122 via a connecting member 140. This facilitates providing a larger installation space for the first pressure detection structure 13 and achieving a reasonable layout of the first pressure detection structure 13 and the second pressure detection structure 14.

[0066] Figure 8 is a schematic diagram of the structure of a second pressure detection structure of a stylus provided in an embodiment of the present application; Figure 9 is a schematic diagram of the structure of a second pressure detection structure of a stylus provided in an embodiment of the present application under one force condition; and Figure 10 is a schematic diagram of the structure of a second pressure detection structure of a stylus provided in an embodiment of the present application under another force condition. It should be noted that Figure 8 may be a schematic diagram of the structure of the second pressure detection structure when the writing end of the pen tip is not subjected to force, Figure 9 may be a schematic diagram of the structure of the second pressure detection structure when the force applied to the writing end of the pen tip is less than a fourth preset value, and Figure 10 may be a schematic diagram of the structure of the second pressure detection structure when the force applied to the writing end of the pen tip is greater than or equal to the fourth preset value.

[0067] 2 , and in combination with FIG. 8 to FIG. 10 , for ease of description, the direction from the connecting portion 110 to the base 120 is defined as a first direction X.

[0068] In some embodiments, the connecting portion 110 is a magnetic conductive sheet, and the second pressure detection structure 14 further includes: a coil 101, the coil 101 is located on the surface of the base 120 close to the connecting portion 110, the axial direction of the coil 101 is parallel to the direction of the connecting portion 110 pointing to the base 120 (the first direction X), and along the direction of the connecting portion 110 pointing to the base 120 (the first direction X), the length L1 of the coil 101 is less than the length L2 of the limiting portion 130; a first spring 102, the first end of the first spring 102 is fixed to the connecting portion 110, and the second end of the first spring 102 is fixed to the base 120; a second spring 103, the first end of the second spring 103 is fixed to the connecting portion 110, and the second end of the second spring 103 is fixed to the base 120; wherein, along the direction perpendicular to the connecting portion 110 pointing to the base 120 (the first direction X), the first spring 102 and the second spring 103 are respectively located on opposite sides of the coil 101.

[0069] Among them, the first spring 102 is the same as the second spring 103, and the first spring 102 and the second spring 103 are respectively located on opposite sides of the coil 101. In this way, under the same force conditions, the distance changes from different positions of the connecting part 110 to the base 120 are the same, which is beneficial to improving the structural stability of the second pressure detection structure 14.

[0070] The magnetic conductive sheet is connected to the stylus tip 12, and the base 120 is fixed to the stylus housing. The small pressure applied to the stylus tip 12 is transmitted through the magnetic conductive sheet to the first spring 102 and the second spring 103, causing the springs to compress and deform. This brings the magnetic conductive sheet and coil 101 closer together along the first direction X, increasing the inductance of coil 101. By measuring the inductance of coil 101, the change in distance between coil 101 and the magnetic conductive sheet can be determined. The pressure applied to the stylus tip 12 can then be accurately measured based on the stiffness of the first and second springs 102, 103, and their respective lengths along the first direction X.

[0071] In some embodiments, springs with smaller stiffness may be selected as the first spring 102 and the second spring 103 , which is beneficial for improving the sensitivity of the second pressure detection structure 14 .

[0072] Along the first direction X, the length L1 of the coil 101 is less than the length L2 of the limiting portion 130. Thus, when the pressure applied to the pen tip 12 is greater than or equal to a fourth predetermined value, the opposing ends of the limiting portion 130 contact the magnetic sheet and the base 120, respectively, protecting the high-precision second pressure detection structure 14. Even if the pressure increases, the relative position between the magnetic sheet and the coil 101 remains constant, and the inductance does not change. It should be noted that before the opposing ends of the limiting portion 130 contact the magnetic sheet and the base 120, respectively, the pressure applied to the pen tip 12 has already entered the operating range of the first pressure detection structure 13, which has a wide range.

[0073] In some embodiments, the orthographic projection of the coil 101 on the base 120 surrounds the orthographic projection of the limiting portion 130 on the base 120. In this way, the space within the inner circle of the coil 101 is used to provide space for the limiting portion 130, which helps to reduce the space occupied by the limiting portion 130 and further helps to reduce the size of the second pressure detection structure 14.

[0074] FIG11 is a schematic structural diagram of another second pressure detection structure of a stylus provided in an embodiment of the present application.

[0075] With reference to FIG2 , and in combination with reference to FIG11 , in some embodiments, the second pressure detection structure 14 includes: a first electrode plate tube 111, the first electrode plate tube 111 is fixed to the surface of the base 120 facing the connecting portion 110, and the axial direction of the first electrode plate tube 111 is parallel to the direction (first direction X) of the connecting portion 110 pointing to the base 120; a pole 112, the pole 112 is fixed to the surface of the connecting portion 110 facing the base 120, the axial direction of the pole 112 is parallel to the axial direction of the first electrode plate tube 111, and the orthographic projection of the first electrode plate tube 111 on the base 120 surrounds the orthographic projection of the pole 112 on the base 120 ; A first spring 102, wherein the first end of the first spring 102 is fixed to the connecting portion 110, and the second end of the first spring 102 is fixed to the base 120; a second spring 103, wherein the first end of the second spring 103 is fixed to the connecting portion 110, and the second end of the second spring 103 is fixed to the base 120; wherein, along a direction perpendicular to the connecting portion 110 pointing to the base 120, the first spring 102 and the second spring 103 are respectively located on opposite sides of the first electrode tube 111, and in the direction along the connecting portion 110 pointing to the base 120 (the first direction X), the length of the limiting portion 130 is greater than the length of the first electrode tube 111.

[0076] Among them, the first spring 102 is the same as the second spring 103, and the first spring 102 and the second spring 103 are respectively located on opposite sides of the first electrode tube 111. In this way, under the same force conditions, the distance changes from different positions of the connecting part 110 to the base 120 are the same, which is beneficial to improving the structural stability of the second pressure detection structure 14.

[0077] In some embodiments, springs with smaller stiffness may be selected as the first spring 102 and the second spring 103 , which is beneficial for improving the sensitivity of the second pressure detection structure 14 .

[0078] The first electrode tube 111 and the electrode 112 serve as the first electrode plate and the second electrode plate of the columnar capacitor respectively, and the capacitance detection principle is used to detect the pressure exerted on the pen tip 12. Specifically, when the pen tip 12 is subjected to pressure, the facing area of ​​the first electrode tube 111 and the electrode 112 changes, causing the capacitance of the columnar capacitor to change. According to the stiffness of the first spring 102 and the second spring 103, as well as the length of the first spring 102 and the second spring 103, the pressure exerted on the pen tip 12 can be accurately measured.

[0079] Along the first direction X, the length of the limiting portion 130 is greater than the length of the first electrode tube 111. Thus, when the pressure applied to the pen tip 12 is greater than or equal to a fourth preset value, the opposing ends of the limiting portion 130 contact the connecting portion 110 and the base 120, respectively, thereby protecting the high-precision second pressure detection structure 14. Even if the pressure increases, the relative position between the first electrode tube 111 and the electrode 112 remains constant, and the capacitance does not change. It should be noted that before the opposing ends of the limiting portion 130 contact the connecting portion 110 and the base 120, respectively, the pressure applied to the pen tip 12 has already entered the operating range of the first pressure detection structure 13 with a wide range.

[0080] In some embodiments, the second pressure detection structure 14 may include a planar plate capacitor with a variable area. In other embodiments, the second pressure detection structure 14 may also include a planar plate capacitor with a variable distance.

[0081] FIG12 is a schematic structural diagram of another second pressure detection structure of a stylus provided in an embodiment of the present application; FIG13 is a schematic orthographic projection diagram of a portion of the second pressure detection structure provided in FIG12 on the base.

[0082] In some embodiments, referring to FIG2 , and in combination with FIG12 and FIG13 , the pole 112 includes a limiting portion 130 and a second pole plate tube 113 sleeved on the outer ring of the limiting portion 130. In the direction from the connecting portion 110 to the base 120 (the first direction X), the length of the limiting portion 130 is greater than the length of the second pole plate tube 113. In other words, the first pole plate tube 111 and the second pole plate tube 113 serve as the first and second pole plates of the columnar capacitor, respectively, and detect the pressure exerted on the pen tip 12 using the capacitance detection principle. Utilizing the space within the inner ring of the second pole plate tube 113 to provide a setting space for the limiting portion 130 is beneficial for reducing the space occupied by the limiting portion 130, thereby facilitating a reduction in the size of the second pressure detection structure 14. Along the first direction X, the length of the limiting portion 130 is greater than the length of the second electrode tube 113. When the pressure applied to the pen tip 12 is greater than or equal to the fourth preset value, the opposite ends of the limiting portion 130 are in contact with the connecting portion 110 and the base 120 respectively, thereby protecting the high-precision second pressure detection structure 14.

[0083] FIG14 is a schematic structural diagram of yet another second pressure detection structure of a stylus provided in an embodiment of the present application.

[0084] Referring to Figure 2 and in combination with reference to reference Figure 14, in some embodiments, the limiting portion 130 includes a first limiting block 131 and a second limiting block 132, and the second pressure detection structure 14 includes: a silicone portion 141 and a thin film pressure sensor 142 distributed in sequence along the direction of the connecting portion 110 pointing to the base 120; along the direction of the connecting portion 110 pointing to the base 120 (first direction X), the silicone portion 141 has a first end and a second end relative to each other, and the thin film pressure sensor 142 has a first end and a second end relative to each other, the first end of the silicone portion 141 is fixed to the connecting portion 110, the second end of the silicone portion 141 is fixed to the first end of the thin film pressure sensor 142, and the second end of the thin film pressure sensor 142 is fixed to the base 120, and the first limiting block 131 and the second limiting block 132 are respectively located on opposite sides of the silicone portion 141.

[0085] Among them, along the first direction X, the length of the first limit block 131 is the same as the length of the second limit block 132, and the first limit block 131 and the second limit block 132 are respectively located on opposite sides of the silicone part 141. In this way, under the same force conditions, the distance changes from each part of the connecting part 110 to the base 120 are the same, which is beneficial to improving the structural stability of the second pressure detection structure 14.

[0086] When the pressure exerted on the pen tip 12 is greater than or equal to the fourth preset value, the opposite ends of the first limit block 131 are in contact with the connecting part 110 and the base 120 respectively, and the opposite ends of the second limit block 132 are in contact with the connecting part 110 and the base 120 respectively. The first limit block 131 and the second limit block 132 protect the high-precision second pressure detection structure 14 to prevent the pressure exerted on the pen tip 12 from exceeding the second range and damaging the second pressure detection structure 14.

[0087] When pressure is applied to the pen tip 12, the force is transmitted through the silicone portion 141 to the thin film pressure sensor 142, and pressure data is obtained by the detection circuit 15. The silicone portion 141 is compressed and deformed by the pressure. When the pressure applied to the pen tip 12 is greater than or equal to a fourth preset value, the opposite ends of the first limit block 131 contact the connecting portion 110 and the base 120, respectively, and the opposite ends of the second limit block 132 contact the connecting portion 110 and the base 120, respectively. The pressure applied to the thin film pressure sensor 142 no longer changes.

[0088] In some embodiments, the thin film pressure sensor 142 may be a piezoresistive thin film pressure sensor, a pressure-capacitive thin film pressure sensor, or a pressure-sensitive thin film pressure sensor.

[0089] The stylus provided in the above embodiment includes a first pressure detection structure and a second pressure detection structure. The range of the first pressure detection structure is greater than the first preset value and less than the second preset value. The range of the second pressure detection structure is greater than the third preset value and less than the fourth preset value. The third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value. The range of the first pressure detection structure is suitable for detecting a larger pressure, and the range of the second pressure detection structure is suitable for detecting a smaller pressure. In this way, the detection of a larger pressure is separated from the detection of a smaller pressure. While improving the detection sensitivity of the pressure detection structure to a smaller pressure, it is beneficial to ensure that the pressure detection structure has a larger range. The pressure detection structure of the stylus not only meets the zero pressure detection requirements, but also ensures a larger pressure detection range, taking into account both high precision and a large range, which is beneficial to improving the performance of the stylus.

[0090] On the other hand, the embodiments of the present application further provide a method for detecting pressure of a stylus pen. It should be noted that for the parts that are the same as or corresponding to the above embodiments, reference can be made to the detailed description of the above embodiments, and will not be repeated below.

[0091] The pressure detection method of a stylus comprises: providing a stylus as described in any one of the above embodiments, the stylus comprising: a shell, the shell having a receiving chamber; a pen tip, the pen tip comprising a first pen tip portion located in the receiving chamber and a second pen tip portion extending from the receiving chamber to the outside of the shell, the second pen tip portion being away from the receiving chamber and used for writing; a first pressure detection structure, the first pressure detection structure being located in the receiving chamber and connected to an end of the first pen tip portion away from the second pen tip portion; a second pressure detection structure, the second pressure detection structure being located in the receiving chamber and connected to the first pen tip portion; The pen tip is connected to the end away from the second pen tip; wherein, the range of the first pressure detection structure is greater than the first preset value and less than the second preset value, the range of the second pressure detection structure is greater than the third preset value and less than the fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value; when the pressure on the end of the second pen tip away from the accommodating cavity is less than the fourth preset value, the pen tip pressure detected by the second pressure detection structure is obtained, and when the pressure on the end of the second pen tip away from the accommodating cavity is greater than or equal to the fourth preset value, the pen tip pressure detected by the first pressure detection structure is obtained.

[0092] In the pressure detection method for the stylus provided in the above embodiment, the detection of greater pressure is separated from the detection of lesser pressure. This improves the detection sensitivity of the pressure detection structure to lesser pressure and helps ensure that the pressure detection structure has a larger measuring range. The pressure detection structure of the stylus not only meets the requirement of zero pressure detection but also has a larger pressure detection range. The pressure detection of the stylus has both high precision and a large range, which helps improve the accuracy of the pressure detection of the stylus.

[0093] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes in form and detail may be made thereto without departing from the spirit and scope of the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and therefore the scope of protection of the present disclosure shall be subject to the scope defined in the claims.

Claims

1. A stylus pen, comprising: a housing, wherein the housing has a receiving cavity; a pen tip, the pen tip comprising a first pen tip portion located in the accommodating cavity and a second pen tip portion extending from the accommodating cavity to the outside of the housing, wherein an end of the second pen tip portion away from the accommodating cavity is used for writing; a first pressure detection structure, the first pressure detection structure being located in the accommodating cavity and connected to an end of the first nib portion away from the second nib portion; a second pressure detection structure, the second pressure detection structure being located in the accommodating cavity and connected to an end of the first nib portion away from the second nib portion; Among them, the range of the first pressure detection structure is greater than the first preset value and less than the second preset value, the range of the second pressure detection structure is greater than the third preset value and less than the fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value.

2. The stylus pen according to claim 1, wherein: The difference between the second preset value and the first preset value is greater than the difference between the fourth preset value and the third preset value.

3. The stylus pen according to claim 1, wherein: The stylus pen further includes a detection circuit, which is disposed in the accommodating cavity, and the first pressure detection structure and the second pressure detection structure are both connected to the detection circuit.

4. The stylus pen according to claim 1, wherein: The second pressure detection structure includes: a connecting portion connected to an end of the first nib portion away from the second nib portion; a base located on a side of the connecting portion away from the pen tip, the base being arranged opposite to the connecting portion with a spacing area between the base and the connecting portion; a limiting portion, the limiting portion being located on a surface of the connecting portion close to the base, or on a surface of the base close to the connecting portion; When the pressure on the end of the second pen tip away from the accommodating cavity is less than the fourth preset value, the limiting portion contacts one of the base and the connecting portion; when the pressure on the end of the second pen tip away from the accommodating cavity is greater than the fourth preset value, along the direction from the connecting portion to the base, the opposite sides of the limiting portion contact the base and the connecting portion respectively.

5. The stylus pen according to claim 4, wherein: The connecting portion is a magnetic conductive sheet, and the second pressure detection structure further includes: a coil, the coil being located on a surface of the base close to the connecting portion, the axial direction of the coil being parallel to a direction from the connecting portion to the base, and the length of the coil along the direction from the connecting portion to the base being less than the length of the limiting portion; a first spring, wherein a first end of the first spring is fixed to the connecting portion, and a second end of the first spring is fixed to the base; a second spring, wherein a first end of the second spring is fixed to the connecting portion, and a second end of the second spring is fixed to the base; Wherein, along a direction perpendicular to the connecting portion and pointing toward the base, the first spring and the second spring are respectively located on opposite sides of the coil.

6. The stylus pen according to claim 5, wherein: The orthographic projection of the coil on the base surrounds the orthographic projection of the limiting portion on the base.

7. The stylus pen according to claim 4, wherein: The second pressure detection structure includes: a first electrode plate tube, the first electrode plate tube being fixed to a surface of the base facing the connecting portion, wherein an axial direction of the first electrode plate tube is parallel to a direction from the connecting portion to the base; a pole, the pole being fixed to a surface of the connecting portion facing the base, the axial direction of the pole being parallel to the axial direction of the first pole plate tube, and the orthographic projection of the first pole plate tube on the base surrounding the orthographic projection of the pole on the base; a first spring, wherein a first end of the first spring is fixed to the connecting portion, and a second end of the first spring is fixed to the base; a second spring, wherein a first end of the second spring is fixed to the connecting portion, and a second end of the second spring is fixed to the base; In which, along the direction perpendicular to the connecting portion pointing to the base, the first spring and the second spring are respectively located on opposite sides of the first electrode plate tube, and along the direction perpendicular to the connecting portion pointing to the base, the length of the limiting portion is greater than the length of the first electrode plate tube.

8. The stylus pen according to claim 7, wherein: The pole includes the limiting portion and a second pole plate tube sleeved on the outer ring of the limiting portion. In the direction from the connecting portion to the base, the length of the limiting portion is greater than the length of the second pole plate tube.

9. The stylus pen according to claim 4, wherein: The limiting portion includes a first limiting block and a second limiting block, and the second pressure detection structure includes: a silicone portion and a thin film pressure sensor distributed in sequence along the direction from the connecting portion to the base; Along the direction from the connecting portion to the base, the silicone portion has a first end and a second end opposite to each other, the thin film pressure sensor has a first end and a second end opposite to each other, the first end of the silicone portion is fixed to the connecting portion, the second end of the silicone portion is fixed to the first end of the thin film pressure sensor, and the second end of the thin film pressure sensor is fixed to the base; The first limiting block and the second limiting block are respectively located on two opposite sides of the silicone portion.

10. A method for detecting pressure of a stylus pen, comprising: A stylus according to any one of claims 1 to 9 is provided, wherein the stylus comprises: a housing, wherein the housing has a receiving cavity; a pen tip, the pen tip comprising a first pen tip portion located in the accommodating cavity and a second pen tip portion extending from the accommodating cavity to the outside of the housing, wherein an end of the second pen tip portion away from the accommodating cavity is used for writing; a first pressure detection structure, the first pressure detection structure being located in the accommodating cavity and connected to an end of the first nib portion away from the second nib portion; a second pressure detection structure, the second pressure detection structure being located in the accommodating cavity and connected to an end of the first nib portion away from the second nib portion; The measuring range of the first pressure detection structure is greater than a first preset value and less than a second preset value, the measuring range of the second pressure detection structure is greater than a third preset value and less than a fourth preset value, the third preset value is less than the first preset value, and the fourth preset value is not less than the first preset value; When the pressure on the end of the second pen tip away from the accommodating cavity is less than the fourth preset value, the pen tip pressure detected by the second pressure detection structure is obtained; when the pressure on the end of the second pen tip away from the accommodating cavity is greater than or equal to the fourth preset value, the pen tip pressure detected by the first pressure detection structure is obtained.

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