Electronic stylus and interactive intelligent tablet system

Abstract

An electronic stylus and an interactive intelligent tablet system. The electronic stylus comprises a housing, a stylus tip, a fixing seat, a piezoelectric element and a control assembly. An accommodating cavity and an opening communicated with the accommodating cavity are formed in the housing; and the fixing seat, the piezoelectric element and the control assembly are all located in the accommodating cavity. The stylus tip passes through the opening; the head end of the stylus tip is located outside the housing, and the tail end of the stylus tip is located in the accommodating cavity; and the stylus tip is slidably connected to the housing in the axial direction of the opening. The fixing seat is connected to the housing. The size of the piezoelectric element in a first direction is greater than the size thereof in a second direction, the first direction being perpendicular to the second direction; the piezoelectric element has a first end and a second end in the second direction; the first end is mounted on the fixing seat; and the second end is suspended. The control assembly is electrically connected to the piezoelectric element; and when the piezoelectric element is deformed, the control assembly sends information of the electronic stylus to an interactive intelligent tablet.

Description

Electronic pen and interactive smart tablet system

[0001] The present application claims priority to the Chinese patent application No. 2024113094655, filed on September 19, 2024, and entitled "Electronic pen and interactive smart tablet system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, and in particular to an electronic pen and an interactive smart tablet system. BACKGROUND

[0003] With the development of technology, teaching, conference and other tools show a trend of electrification. For example, electronic tablets and electronic pens matched with the electronic tablets appear. When the electronic pen writes on the electronic tablet, the electronic tablet can display the content written by the electronic pen.

[0004] The electronic pen has functions such as switching colors. In the related art, it is usually detected whether the tip of the electronic pen is pressed, and the electronic pen is triggered when the tip is pressed. In this way, the pressure signal received by the tip needs to be converted into an electrical signal. For this purpose, the related art proposes to convert the pressure signal into an electrical signal by means of a light touch button.

[0005] The inventor found that the light touch button assembly is relatively complex in the prior art during the implementation of the present application. SUMMARY

[0006] The present application provides an electronic pen and an interactive smart tablet system, which can improve the problem that the light touch button assembly is relatively complex in the related art.

[0007] In a first aspect, an electronic pen is provided, comprising a shell, a pen head, a fixing seat, a piezoelectric sheet and a control component, the shell forms a containing cavity, and the shell is provided with an opening communicating with the containing cavity; the pen head passes through the opening, and a head end of the pen head is located outside the shell, and a tail end of the pen head is located in the containing cavity, the pen head is slidably connected with the shell along an axis direction of the opening; the fixing seat is arranged in the containing cavity and connected with the shell; the piezoelectric sheet is arranged in the containing cavity, the piezoelectric sheet has a size in a first direction greater than a size in a second direction, the first direction is perpendicular to the second direction, the piezoelectric sheet has a first end and a second end in the second direction, the first end is installed on the fixing seat, and the second end is arranged in suspension; the control component is arranged in the containing cavity and electrically connected with the piezoelectric sheet, when the piezoelectric sheet deforms, the control component sends information of the electronic pen to an interactive smart tablet.

[0008] The piezoelectric sheet can be directly installed and fixed on the fixing seat, so that the assembly is simple. Moreover, the long side of the piezoelectric sheet is fixed on the fixing seat, so that the fixing effect of the piezoelectric sheet is good, and the deformation degree of the piezoelectric sheet when being extruded is small.

[0009] In some example embodiments, in the second direction, the piezoelectric sheet has a pressing part abutting against the tail end of the pen head, and the pressing part is closer to the second end than the first end.

[0010] Based on the above-mentioned embodiments, since the pressing part is closer to the second end, the area between the pressing part and the first end can be clamped by the fixing seat, so that the fixing seat extends relatively more from the first end to the second end, the fixing seat can be relatively large, the strength of the fixing seat itself can be relatively high, the contact area between the fixing seat and the piezoelectric sheet is relatively large, and the fixing strength of the fixing seat on the piezoelectric sheet is high.

[0011] In some example embodiments, in the second direction, the tail end of the pen head is formed with a avoiding space on the side close to the first end, so that the pressing part is closer to the second end than the first end.

[0012] Based on the above-mentioned embodiments, since the avoiding space makes the abutting area between the pen head and the piezoelectric sheet small, that is, the stress on the piezoelectric sheet is more concentrated, which is more conducive to the deformation of the piezoelectric sheet to generate a stronger signal amount. Moreover, by changing the size of the tail end of the pen head, the pen head as a whole can be kept on the axis of the electronic pen without moving the entire pen head, so that the hand feeling is good during writing, and the writing habit of the public is met.

[0013] In some example embodiments, in the first direction, the abutting position between the tail end of the pen head and the piezoelectric sheet is located at the middle position of the piezoelectric sheet.

[0014] Based on the above-mentioned embodiments, the pressing part is located at the middle position in the first direction, so that the stress on the piezoelectric sheet in the first direction is more uniform as a whole, that is, the deformation amount of the piezoelectric sheet is relatively more uniform, so as to avoid damage of the piezoelectric sheet due to uneven stress, and the service life of the piezoelectric sheet is improved.

[0015] In some example embodiments, the axis direction of the opening is perpendicular to the piezoelectric sheet.

[0016] Based on the above-mentioned embodiments, the plate surface of the piezoelectric sheet is perpendicular to the axis direction of the opening, which is equivalent to being perpendicular to the pressing direction of the pen head. The piezoelectric sheet can be deformed more easily, and the pen head will not produce sliding friction on the piezoelectric sheet, so as to avoid damaging the piezoelectric sheet or affecting the pressing detection due to insufficient deformation.

[0017] In some example embodiments, the control assembly comprises a control board and a metal spring plate arranged on the control board, the metal spring plate is in abutment with the piezoelectric sheet, and the control board is electrically connected with the piezoelectric sheet through the metal spring plate.

[0018] Based on the above-mentioned embodiments, the piezoelectric sheet is clamped and fixed by the fixing seat, and the piezoelectric sheet is electrically connected through the metal spring plate, so that the electrical connection can be realized while the piezoelectric sheet is fixed, the assembly process of the piezoelectric sheet can be saved, and the assembly efficiency of the electronic pen is improved.

[0019] In some example embodiments, the fixing seat comprises two clamping portions arranged oppositely and spaced apart, and the first end is clamped and fixed between the two clamping portions.

[0020] Based on the above-mentioned embodiments, generally speaking, the clamping portion has a certain elasticity, when the piezoelectric sheet is pressed by the pen head, the piezoelectric sheet can cause slight elastic deformation of the clamping portion, and the elastic function of the clamping portion can make the clamping portion deform after being pressed for many times and still return to the original position, so that the clamping effect of the clamping portion is more durable. Moreover, due to the clamping effect of the clamping portion on the piezoelectric sheet, the piezoelectric sheet can be assisted to recover the deformation.

[0021] In some example embodiments, the electronic pen further comprises a limiting seat, the limiting seat is arranged in the accommodating cavity and connected with the shell, along the axis direction of the opening, the limiting seat is arranged on the side of the piezoelectric sheet away from the pen head, and the limiting seat is arranged spaced apart from the piezoelectric sheet.

[0022] Based on the above-mentioned embodiments, the limiting seat can limit the degree of pressure deformation of the piezoelectric sheet, so as to avoid excessive pressure of the pen head on the piezoelectric sheet and damage the piezoelectric sheet.

[0023] In some example embodiments, the shell comprises an outer shell and a support, the outer shell has the accommodating cavity and the opening; the support is arranged in the accommodating cavity and connected with the shell, and the fixing seat and the control assembly are arranged on the support.

[0024] Based on the above-mentioned embodiments, the support, the pen head, the fixing seat, the piezoelectric sheet and the control assembly can be assembled outside the shell, and then assembled in the accommodating cavity of the shell, so that the assembly is more convenient.

[0025] In some example embodiments, the outer shell comprises a first shell and a second shell, the first shell and the second shell form the accommodating cavity, and the opening is arranged on the first shell; the control assembly comprises a control board and an infrared emitter arranged on the control board, the first shell is arranged corresponding to the infrared emitter, and the first shell can transmit infrared rays.

[0026] Based on the above embodiment, by setting the shell into a first shell and a second shell, by the combination of the first shell and the second shell, the first shell can transmit infrared rays, the second shell can have higher strength, and has lower production cost, which can make the infrared signal transmit through the shell, and ensure the strength of the shell, so that the shell can balance the function, strength and cost.

[0027] In some exemplary embodiments, a limiting groove is arranged on the pen head, a limiting protrusion corresponding to the limiting groove is arranged on the support, the limiting protrusion and the limiting groove are limitedly matched to limit the movement range of the pen head relative to the support; and / or a first limiting plane is arranged on the side surface of the pen head, a second limiting plane corresponding to the first limiting plane is arranged on the support, and the first limiting plane and the second limiting plane are abutted to limit the rotation of the pen head relative to the support.

[0028] Based on the above embodiment, the limiting protrusion and the limiting groove are limitedly matched to limit the movement range of the pen head relative to the support, thereby avoiding the pen head from falling off the support. The first limiting plane and the second limiting plane are abutted to limit the rotation of the pen head relative to the support.

[0029] In a second aspect, the embodiment of the present application provides an interactive intelligent tablet system, which comprises an electronic pen and an interactive intelligent tablet. When the electronic pen writes on the interactive intelligent tablet, the piezoelectric sheet of the electronic pen deforms and generates an electric signal. After the control assembly of the electronic pen detects the electric signal, the control assembly sends information of the electronic pen to the interactive intelligent tablet according to the electric signal. The interactive intelligent tablet receives the information of the electronic pen, and generates a handwriting according to the information of the electronic pen and a touch signal generated when the electronic pen writes on the interactive intelligent tablet.

[0030] The piezoelectric sheet of the embodiment of the present application can be directly installed and fixed on the fixing seat, so that the assembly is relatively simple. Moreover, since the long side of the piezoelectric sheet is fixed on the fixing seat, the fixing effect of the piezoelectric sheet is better, and the deformation degree of the piezoelectric sheet when being extruded is smaller. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0032] FIG. 1 is a structural schematic diagram of an electronic pen in an embodiment of the present application;

[0033] Fig. 2 is an exploded structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0034] Fig. 3 is an exploded structural schematic diagram of an electronic pen according to another embodiment of the present application;

[0035] Fig. 4 is an exploded structural schematic diagram of an electronic pen according to yet another embodiment of the present application;

[0036] Fig. 5 is a partial structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0037] Fig. 6 is a partial exploded structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0038] Fig. 7 is a front view of an electronic pen according to an embodiment of the present application;

[0039] Fig. 8 is a sectional view along A-A of Fig. 7;

[0040] Fig. 9 is a partial exploded structural schematic diagram of an electronic pen according to another embodiment of the present application;

[0041] Fig. 10 is a partial exploded structural schematic diagram of an electronic pen according to yet another embodiment of the present application;

[0042] Fig. 11 is a partial exploded structural schematic diagram of an electronic pen according to still another embodiment of the present application.

[0043] Reference Signs: 100, electronic pen; 110, shell; 110a, accommodating cavity; 110b, opening; 111, outer shell; 1111, first shell; 1112, second shell; 112, support; 112a, second limiting plane; 1121, first support; 1122, second support; 1123, limiting protrusion; 120, pen head; 120a, avoiding space; 120b, limiting groove; 120c, first limiting plane; 121, head end; 122, tail end; 130, fixing seat; 131, clamping part; 140, piezoelectric sheet; 141, first end; 142, second end; 150, control assembly; 151, control board; 151a, avoiding groove; 152, metal elastic sheet; 153, infrared emitter; 160, limiting seat; AA, axial direction; BB, first direction; CC, second direction. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0045] With the development of science and technology, teaching, conference and other tools show a trend of electronic, for example, electronic tablets and electronic pens appear. When the electronic pen writes on the electronic tablet, the electronic tablet can display the content written by the electronic pen. The electronic tablet is an interactive intelligent panel (IIP), for example, an infrared interactive intelligent panel, and at this time, the corresponding is an infrared electronic pen.

[0046] The electronic pen has a function of switching colors and the like, and a user can switch to a corresponding color through a switching switch of the electronic pen, and then each color corresponds to an ID identifier, and when starting writing, the electronic pen sends the electronic pen ID identifier information to a receiving end of the electronic tablet, and the electronic tablet displays a handwriting corresponding to the electronic pen ID identifier information, such as a handwriting color or a handwriting type. The handwriting type can be a type of line, such as a dashed line, a solid line and the like. The handwriting type can also be a type of a real pen, such as a brush pen, a fountain pen, a marker pen, a pencil and the like. In the related art, it is usually detected whether the tip of the electronic pen is pressed, and the electronic pen is triggered when the tip is pressed. In this way, the pressure signal received by the tip needs to be converted into an electrical signal. For this, the related art proposes to convert the pressure signal into an electrical signal through a light touch button.

[0047] The inventor found that the prior art has the following problems in the process of implementing the present application: the light touch button assembly is relatively complex, and the pressing may be stuck, affecting the efficiency and experience of writing; and the service life of the light touch button is generally 100,000-150,000 times, and in the case of frequent use of the electronic pen, the service life of the light touch button will be quickly consumed, so the service life of the electronic pen is also not long.

[0048] Based on this, the inventor studies whether the tip contacting the writing surface can be determined without a button, and other structural ways are adopted so that the writing does not produce a stuck condition and the service life of the electronic pen can be improved. The inventor found that the deformation of the piezoelectric sheet can also be used to determine whether the tip contacts the writing surface, and the structure is simple, the piezoelectric sheet does not exist in the stuck condition when the tip contacts and contacts, and the service life can reach more than 1 million times of pressing.

[0049] The first aspect of the embodiment of the present application provides an electronic pen, which detects whether the tip is pressed by whether the piezoelectric sheet is deformed and generates an electrical signal by the tip pressing the piezoelectric sheet. When the piezoelectric sheet is pressed, the piezoelectric sheet generates a voltage and a current signal, which is suitable for the use scenario of the electronic pen. And the piezoelectric sheet is assembled by clamping and fixing, which is more reliable and efficient in assembly, simple in structure and does not produce a stuck condition, and the service life can reach more than 5 million times of pressing.

[0050] Please refer to FIG. 1 to FIG. 4, the electronic pen 100 comprises a shell 110, a pen head 120, a fixing base 130, a piezoelectric sheet 140 and a control assembly 150.

[0051] The shell 110 is formed with a receiving cavity 110a, and the shell 110 is provided with an opening 110b in communication with the receiving cavity 110a. The fixing base 130, the piezoelectric sheet 140 and the control assembly 150 are all arranged in the receiving cavity 110a, and the shell 110 can play a certain protective role on the fixing base 130, the piezoelectric sheet 140 and the control assembly 150. The material of the shell 110 can exemplarily be plastic, so that the shell 110 can be formed into a complex shape by injection molding, the production cost is relatively low, and the shell 110 is relatively light in texture, which is beneficial to the weight reduction of the electronic pen 100.

[0052] The pen head 120 penetrates through the opening 110b, and the head end 121 of the pen head 120 is located outside the shell 110, and the tail end 122 of the pen head 120 is located in the receiving cavity 110a. The pen head 120 is slidably connected with the shell 110 along the axial direction AA of the opening 110b. The fixing base 130 is connected with the shell 110 and is fixed relative to the shell 110. The piezoelectric sheet 140 is fixed to the fixing base 130. The control assembly 150 is electrically connected with the piezoelectric sheet 140.

[0053] In use, the pen head 120 of the electronic pen 100 according to the embodiments of the present application is pressed and can slide relative to the shell 110 along the axial direction AA of the opening 110b. If the pen head 120 slides relative to the shell 110 and presses the piezoelectric sheet 140 and makes the piezoelectric sheet 140 deform, the piezoelectric sheet 140 will generate an electric signal, and the control assembly 150 can know that the pen head 120 of the electronic pen 100 is pressed through the electric signal. Based on this, the control assembly 150 can make a certain response. If the pen head 120 of the electronic pen 100 is not pressed, the piezoelectric sheet 140 will not generate an electric signal, and the control assembly 150 will not receive the electric signal and will not make a response.

[0054] It should be noted that the piezoelectric sheet 140 has a certain elasticity. When the pen head 120 is pressed, the piezoelectric sheet 140 can be deformed by the pen head 120 and generate an electric signal. If the pressing force of the pen head 120 is removed, the piezoelectric sheet 140 can return to the initial position under the action of its own elastic force and push the pen head 120 back to the initial position, so that the pen head 120 can deform and generate an electric signal by pressing the piezoelectric sheet 140 next time.

[0055] When the electronic pen 100 is writing, the tail end 122 of the pen head 120 presses against the piezoelectric sheet 140 along the axis direction AA of the opening 110b, so that the piezoelectric sheet 140 is deformed and generates an electric signal. After the control assembly 150 detects the electric signal, the control assembly 150 sends information of the electronic pen 100 to the interactive smart tablet according to the electric signal. For example, the control assembly 150 can include an infrared emitter 153. If the control assembly 150 senses that the pen head 120 of the electronic pen 100 is pressed, the control assembly 150 can control the infrared emitter 153 to emit an infrared signal. After the electronic tablet receives the infrared signal emitted by the infrared emitter 153, the electronic tablet can give the line written by the electronic pen 100 a certain color.

[0056] Please refer to FIGS. 2-4. In some embodiments, the shell 110 includes a housing 111 and a bracket 112. The housing 111 has a receiving cavity 110a and an opening 110b. The bracket 112 is disposed in the receiving cavity 110a and connected with the shell 110. The bracket 112 can be a hollow bearing structure extending along the length direction of the shell 110. One or more of the pen head 120, the fixing seat 130, the piezoelectric sheet 140, and the control assembly 150 can be fixed to the bracket 112. In this way, the assembly of the bracket 112 and the pen head 120, the fixing seat 130, the piezoelectric sheet 140, and the control assembly 150 can be completed outside the shell 110, and then assembled together in the receiving cavity 110a of the shell 110, which is more convenient. For example, the pen head 120 is slidingly connected with the bracket 112. The fixing seat 130 can be fixedly disposed on the bracket 112, or the fixing seat 130 and the bracket 112 can be integrally formed. The piezoelectric sheet 140 is mounted on the fixing seat 130. The control assembly 150 is mounted on the bracket 112.

[0057] Please refer to FIG. 3-5, in some embodiments, the shell 111 comprises a first shell 1111 and a second shell 1112, the first shell 1111 and the second shell 1112 enclose the accommodating cavity 110a, and the first shell 1111 is provided with the opening 110b. The first shell 1111 and the second shell 1112 can be connected by ultrasonic welding, clamping, bonding or the like. The control assembly 150 comprises a control board 151 and an infrared emitter 153 arranged on the control board 151, the first shell 1111 is arranged corresponding to the infrared emitter 153, and the first shell 1111 can transmit infrared rays. The second shell 1112 can be made of opaque material, so that the second shell 1112 has higher strength and lower production cost, and the opaque second shell 1112 can also shield the components inside the electronic pen 100, so that the electronic pen 100 is more beautiful. In the embodiment, the shell 111 is divided into the first shell 1111 and the second shell 1112, the first shell 1111 can transmit infrared rays, the second shell 1112 has higher strength and lower production cost, the infrared signal can be transmitted through the shell 111, and the strength of the shell 111 is ensured, so that the shell 111 can balance the function, strength and cost.

[0058] Please refer to FIG. 4, in some embodiments, the bracket 112 comprises a first bracket 1121 and a second bracket 1122, the first bracket 1121 and the second bracket 1122 are buckled, so as to facilitate fixing the pen head 120, the fixing seat 130, the piezoelectric sheet 140 and the control assembly 150 between the first bracket 1121 and the second bracket 1122, that is, facilitating the assembly of the pen head 120, the fixing seat 130, the piezoelectric sheet 140 and the control assembly 150.

[0059] Please refer to FIG. 5-8, in some embodiments, the piezoelectric sheet 140 has a size in the first direction BB greater than a size in the second direction CC, the first direction BB is perpendicular to the second direction CC, the piezoelectric sheet 140 has a first end 141 and a second end 142 in the second direction CC, the first end 141 is installed on the fixing seat 130, and the second end 142 is provided in a suspended manner. Since the piezoelectric sheet 140 is fixed by the fixing seat 130, the assembly mode of the piezoelectric sheet 140 is relatively simple. For example, the shape of the piezoelectric sheet 140 can be quadrilateral such as rectangle, the piezoelectric sheet 140 has a long side extending along the first direction BB and a short side extending along the second direction CC, one of the long sides of the piezoelectric sheet 140 is fixed on the fixing seat 130, and the other long side is provided in a suspended manner, the pen head 120 presses the piezoelectric sheet 140, so that the short side of the piezoelectric sheet 140 deflects around a straight line in the first direction BB as an axis.

[0060] It can be understood that, due to the relatively longer length of the long side, the contact area of the long side with the fixing seat 130 can be larger, and thus the fixing effect is better. The length of the short side is relatively shorter, and thus the force arm of the force of the pen head 120 on the piezoelectric sheet 140 is smaller, the degree of deformation of the short side is smaller, and the rebounding amplitude of the pen head 120 is smaller when the electronic pen 100 is used for writing, and the writing experience is better. Moreover, the electronic pen 100 of the embodiment of the present application has a simple structure, and whether the pen head 120 is in contact is determined by the deformation of the piezoelectric sheet 140, and the piezoelectric sheet 140 does not exist in the situation of being stuck, and the service life of the electronic pen 100 can reach more than one million times of pressing life. In addition, the piezoelectric sheet 140 generates voltage by itself when being pressed, and does not need system power supply, compared with other sensors or keys that need system power supply for detection, the battery endurance time of the electronic pen 100 can be prolonged.

[0061] Please refer to FIGS. 5 to 8, in some embodiments, in the second direction CC, the piezoelectric sheet 140 has a pressing part that abuts against the tail end 122 of the pen head 120, and the pressing part is closer to the second end 142 than the first end 141. Since the pressing part is closer to the second end 142, the area between the pressing part and the first end 141 can be clamped by the fixing seat 130, so that the fixing seat 130 extends relatively more from the first end 141 to the second end 142, the fixing seat 130 can be relatively larger, the strength of the fixing seat 130 itself can be relatively higher, and the contact area of the fixing seat 130 with the piezoelectric sheet 140 is relatively larger, and the fixing strength of the fixing seat 130 on the piezoelectric sheet 140 is higher. In addition, since the pressing part is closer to the second end 142, the force on the second end 142 is relatively larger, so that the second end 142 is prone to deformation, thereby generating a stronger signal amount.

[0062] Please refer to FIG. 8 and FIG. 9, in some embodiments, in the second direction CC, the tail end 122 of the pen head 120 is formed with a clearance space 120a on the side close to the first end 141, so that the pressing part is closer to the second end 142 than the first end 141. For example, a slope can be arranged on the side of the tail end 122 of the pen head 120 close to the first end 141, so that the pressing part is biased to the second end 142. The embodiments of the present application do not limit the shape of the clearance space 120a, as long as the part of the pen head 120 abutting against the piezoelectric sheet 140 is biased to the second end 142, so that the pressing part can be close to the second end 142. Since the arrangement of the clearance space 120a will make the abutting area of the pen head 120 and the piezoelectric sheet 140 smaller, that is, make the force on the piezoelectric sheet 140 more concentrated, it is more conducive to the deformation of the piezoelectric sheet 140 to generate a stronger signal. Moreover, by changing the size of the contact surface of the tail end 122 of the pen head 120 and the pressing part, the pen head 120 as a whole can be kept on the axis of the electronic pen 100 without deviating from the axis of the electronic pen 100, so that the hand feeling is better during writing, which meets the writing habits of the public.

[0063] Please refer to FIG. 6, in some embodiments, in the first direction BB, the abutting position of the tail end 122 of the pen head 120 and the piezoelectric sheet 140 is located at the middle position of the piezoelectric sheet 140. The pressing part is located at the middle position of the first direction BB, so that the force on the piezoelectric sheet 140 in the first direction BB is more uniform as a whole, that is, the deformation of the piezoelectric sheet 140 is more uniform, which improves the service life of the piezoelectric sheet 140.

[0064] Please refer to FIG. 6, in some embodiments, the first direction BB and the second direction CC are both perpendicular to the axis direction AA of the opening 110b, that is, the board surface of the piezoelectric sheet 140 is perpendicular to the axis direction AA of the opening 110b, which is equivalent to being perpendicular to the pressing direction of the pen head 120. The piezoelectric sheet 140 can be deformed more easily and will not generate sliding friction with the pen head 120, so that the piezoelectric sheet 140 will not be damaged or the pressing detection will not be affected due to insufficient deformation.

[0065] Please refer to FIG. 5 and FIG. 6, in some embodiments, the control assembly 150 includes a control board 151 and metal springs 152 arranged on the control board 151. The number of the metal springs 152 is two, and the two metal springs 152 are electrically connected with the control board 151. The metal springs 152 and the control board 151 can be welded by conductive material, so that the metal springs 152 are fixed on the control board 151 while being electrically connected with the control board 151 through the welding material, which simplifies the assembly process of the metal springs 152. Directly welding the metal springs 152 on the control board 151 can make the electrical connection between the metal springs 152 and the control board 151 more reliable.

[0066] The metal elastic sheet 152 is in abutment with the piezoelectric sheet 140, and the control plate 151 is electrically connected with the piezoelectric sheet 140 through the metal elastic sheet 152. Alternatively, when the piezoelectric sheet 140 is installed in the fixing seat 130, the metal elastic sheet 152 is electrically connected with the piezoelectric sheet 140, so that when the piezoelectric sheet 140 is assembled, the effect of fixing the piezoelectric sheet 140 and the effect of electrical connection between the piezoelectric sheet 140 and the metal elastic sheet 152 can be achieved at the same time, thereby saving the assembly process. It should be noted that the elastic force of the metal elastic sheet 152 is very small, and the force of the metal elastic sheet 152 on the piezoelectric sheet 140 can be ignored compared to the force of the pen tip 120 on the piezoelectric sheet 140 when the electronic pen 100 is writing, so the metal elastic sheet 152 will not cause the piezoelectric sheet 140 to generate a signal due to stress.

[0067] The control plate 151 can be fixed relative to the shell 110. For example, the control plate 151 can be fixed to the shell 110 by clamping, screwing or the like. For example, the control plate 151 is provided with one of a positioning protrusion and a positioning groove, the shell 110 is provided with the other one of the positioning protrusion and the positioning groove, the positioning protrusion is located in the positioning groove, and the positioning protrusion and the positioning groove match with each other. Referring to FIG. 6, in the embodiment, the control plate 151 is provided with the positioning groove, and the shell 110 is provided with the positioning protrusion. The positioning protrusion and the positioning groove are beneficial to the positioning of the control plate 151 in the shell 110, and are beneficial to improving the assembly positioning precision and assembly stability of the control plate 151 in the shell 110.

[0068] Please refer to FIG. 5 and FIG. 6. In some embodiments, the fixing seat 130 includes two clamping portions 131 which are opposite and spaced apart, and the first end 141 of the piezoelectric sheet 140 is clamped and fixed between the two clamping portions 131. The clamping portion 131 can be integrally formed with the support 112.

[0069] Generally, the clamping portion 131 has a certain elasticity, thereby facilitating the installation of the piezoelectric sheet 140. For example, the clamping portion 131 can be made of plastic. When the piezoelectric sheet 140 is pressed by the pen tip 120, the piezoelectric sheet 140 can cause the clamping portion 131 to slightly elastically deform. The elastic function of the clamping portion 131 can make the clamping portion 131 deform and still return to the original position after being pressed for many times, so that the clamping effect of the clamping portion 131 is relatively persistent. Moreover, the clamping effect of the clamping portion 131 on the piezoelectric sheet 140 can assist the piezoelectric sheet 140 to recover from deformation.

[0070] Referring to FIG. 5 and FIG. 6, in some embodiments, the electronic pen 100 further comprises a limiting seat 160, which is arranged in the accommodating cavity 110a and connected with the shell 110. The limiting seat 160 can limit the degree of deformation of the piezoelectric sheet 140, so as to avoid the piezoelectric sheet 140 from being damaged due to excessive pressure of the pen tip 120. The limiting seat 160 can be directly fixed on the shell 110 or other fixed members in the shell 110, as long as the limiting function of the piezoelectric sheet 140 is achieved, which is not limited. For example, the limiting seat 160 can be integrally formed with the support 112.

[0071] The limiting seat 160 is fixed relative to the shell 110 and arranged on the side of the piezoelectric sheet 140 away from the pen tip 120 along the axis direction AA of the opening 110b. The limiting seat 160 is arranged in a spaced manner with the piezoelectric sheet 140, i.e., a gap is left between the limiting seat 160 and the pressing portion. The limiting seat 160 can limit the degree of deformation of the piezoelectric sheet 140, so as to avoid the piezoelectric sheet 140 from being damaged due to excessive pressure of the pen tip 120.

[0072] Specifically, when the pen tip 120 is pressed, the pressing portion of the piezoelectric sheet 140 is pressed by the pen tip 120 and deformed to abut against the limiting seat 160. Under the constraint of the limiting seat 160, the counteracting force acting on the pen tip 120 increases, and the pressing difficulty increases, so that the pen tip 120 is difficult to further press the piezoelectric sheet 140, and the difficulty of the piezoelectric sheet 140 to continue to deform also increases, thereby protecting the piezoelectric sheet 140.

[0073] Optionally, the gap between the limiting seat 160 and the pressing portion is greater than or equal to 0.1 mm and less than or equal to 0.3 mm along the axis direction AA of the opening 110b. In this way, the piezoelectric sheet 140 can have sufficient deformation under the condition of avoiding excessive pressure and damage. For example, when the piezoelectric sheet 140 is deformed by the pen tip 120, a voltage signal of 1 V or more can be generated, which can be sensed by the control assembly 150, without the need for additional operational amplifier amplification circuit to amplify the voltage signal, thereby reducing the power consumption and manufacturing cost of the electronic pen 100.

[0074] Optionally, the control plate 151 is provided with a corresponding avoiding slot 151a corresponding to the limiting seat 160. After the control plate 151 is assembled with the support 112, the limiting seat 160 passes through the avoiding slot 151a. The limiting seat 160 can limit the movement range of the control plate 151 relative to the support 112, so that the limiting seat 160 has a certain limiting effect on the control plate 151.

[0075] Please refer to FIG. 10, in some embodiments, the pen head 120 is provided with a limiting slot 120b, and the support 112 is provided with a limiting protrusion 1123 corresponding to the limiting slot 120b. The limiting protrusion 1123 and the limiting slot 120b are in limiting cooperation to limit the moving range of the pen head 120 relative to the support 112 in the axial direction AA of the electronic pen 100, so as to avoid the pen head 120 from falling off the support 112. Alternatively, the pressing part of the piezoelectric sheet 140 can be connected with the pen head 120 to avoid the pen head 120 from falling off the shell 110.

[0076] Please refer to FIG. 10 and FIG. 11, in some embodiments, the side surface of the pen head 120 is provided with a first limiting plane 120c, and the support 112 is provided with a second limiting plane 112a corresponding to the first limiting plane 120c. The first limiting plane 120c and the second limiting plane 112a are in abutment to limit the rotation of the pen head 120 relative to the support 112 around the electronic pen axis.

[0077] In some embodiments, the control component 150 will send the information of the electronic pen 100 when detecting that the electric signal meets the preset condition (for example, greater than a preset voltage value). The information of the electronic pen 100 can include the electronic pen ID identification information. After the electronic tablet receives the electronic pen ID identification information, the handwriting corresponding to the electronic pen ID identification information will be displayed, for example, the handwriting color or the handwriting type.

[0078] The embodiments of the present application can adjust the sensitivity of the electronic pen 100 by adjusting the size of the preset voltage value, so as to avoid the electronic pen 100 from sending signals due to slight vibration or touch, and improve the accuracy of the electronic pen 100 in recognizing handwriting. Alternatively, the user can adjust the different sensitivity levels of the electronic pen 100 by adjusting the size of the preset voltage value, so that the electronic pen 100 can meet the writing habits of different users.

[0079] The second aspect of the embodiments of the present application provides an interactive intelligent tablet system, which includes the electronic pen 100 of any of the above embodiments and an interactive intelligent tablet.

[0080] When the electronic pen 100 is writing on the interactive smart panel, the piezoelectric sheet 140 of the electronic pen 100 is deformed and generates an electric signal. After the control assembly 150 of the electronic pen 100 detects the electric signal, the control assembly 150 sends the information of the electronic pen 100 to the interactive smart panel according to the electric signal. In some embodiments, the control assembly 150 will send the information of the electronic pen 100 when it detects that the electric signal meets a preset condition (e.g., greater than a preset voltage value). The information of the electronic pen 100 can include the electronic pen ID identification information. The interactive smart panel receives the information of the electronic pen 100 and generates handwriting according to the information of the electronic pen 100 and the touch signal generated by the electronic pen 100 when writing on the interactive smart panel. After receiving the electronic pen ID identification information, the interactive smart panel displays handwriting corresponding to the electronic pen ID identification information, such as handwriting color or handwriting type.

[0081] The interactive smart panel system of the present application has a simple assembly method of the piezoelectric sheet 140, which is fixed by the fixing seat 130. The length of the long side is relatively longer, so the contact area between the long side and the fixing seat 130 can be larger, and the fixing effect is better. The length of the short side is relatively shorter, so the force arm of the force of the pen tip 120 on the piezoelectric sheet 140 is smaller, and the degree of deformation of the short side is smaller. When using the electronic pen 100 to write, the rebound amplitude of the pen tip 120 is smaller, and the writing experience is better. Moreover, the electronic pen 100 of the present application has a simple structure, which judges whether the pen tip 120 is in contact by the deformation of the piezoelectric sheet 140, and the piezoelectric sheet 140 does not exist in the situation of being stuck, and the service life of the electronic pen 100 can reach more than one million times of pressing life. In addition, the piezoelectric sheet 140 generates voltage by itself when it is pressed without the need for system power supply, compared with other sensors or keys that need system power supply, the battery life of the electronic pen 100 can be prolonged.

[0082] In the drawings of the present application, the same or similar reference signs correspond to the same or similar components; in the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0083] The above description is only the preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electronic pen, wherein, The electronic pen comprises: a shell, which is provided with a containing cavity and an opening communicating with the containing cavity; a pen head, which passes through the opening and has a head end outside the shell and a tail end inside the containing cavity, and is slidably connected with the shell along the axial direction of the opening; a fixing seat, which is arranged in the containing cavity and connected with the shell; a piezoelectric sheet, which is arranged in the containing cavity and has a size in a first direction larger than a size in a second direction, the first direction being perpendicular to the second direction, the piezoelectric sheet having a first end and a second end in the second direction, the first end being mounted on the fixing seat and the second end being arranged in a suspended manner; a control assembly, which is arranged in the containing cavity and electrically connected with the piezoelectric sheet, and sends information of the electronic pen to an interactive smart tablet when the piezoelectric sheet deforms.

2. The electronic pen according to claim 1, wherein In the second direction, the piezoelectric sheet has a pressing part abutting against the tail end of the pen head, and the pressing part is closer to the second end than the first end.

3. The electronic pen according to claim 2, wherein In the second direction, the tail end of the pen head is formed with a avoiding space on the side close to the first end, so that the pressing part is closer to the second end than the first end.

4. The electronic pen of claim 1, wherein, In the first direction, the abutting position of the tail end of the pen head and the piezoelectric sheet is located at the middle position of the piezoelectric sheet.

5. The electronic pen of claim 1, wherein, The axial direction of the opening is perpendicular to the piezoelectric sheet.

6. The electronic pen of claim 1, wherein, The control assembly comprises a control board and a metal spring sheet arranged on the control board, the metal spring sheet abuts against the piezoelectric sheet, and the control board is electrically connected with the piezoelectric sheet through the metal spring sheet.

7. The electronic pen of claim 1, wherein, The fixing seat comprises two clamping parts arranged oppositely and spaced apart, and the first end is clamped and fixed between the two clamping parts.

8. The electronic pen of claim 1, wherein, The electronic pen further comprises a limiting seat, which is arranged in the containing cavity and connected with the shell, and arranged on the side of the piezoelectric sheet away from the pen head along the axial direction of the opening, and the limiting seat is arranged spaced apart from the piezoelectric sheet.

9. The electronic pen of claim 1, wherein, The shell comprises: an outer shell, which has the containing cavity and the opening; a support, which is arranged in the containing cavity and connected with the shell, and the fixing seat and the control assembly are arranged on the support.

10. The electronic pen according to claim 9, wherein, A limiting groove is arranged on the pen head, a limiting protrusion corresponding to the limiting groove is arranged on the support, and the limiting protrusion and the limiting groove are limitedly matched to limit the movement range of the pen head relative to the support.

11. The electronic pen of claim 9, wherein, A first limiting plane is arranged on the side surface of the pen head, a second limiting plane corresponding to the first limiting plane is arranged on the support, and the first limiting plane and the second limiting plane abut to limit the rotation of the pen head relative to the support.

12. The electronic pen of claim 9, wherein, The outer shell comprises a first shell and a second shell, the first shell and the second shell are arranged to enclose the containing cavity, and the first shell is provided with the opening; the control assembly comprises a control board and an infrared emitter arranged on the control board, the first shell is arranged corresponding to the infrared emitter, and the first shell can transmit infrared rays.

13. An interactive smart panel system, wherein, The interactive smart tablet system comprises an electronic pen, and the electronic pen comprises: A shell is formed with a receiving cavity, and the shell is provided with an opening communicating with the receiving cavity; A pen head passes through the opening, and a head end of the pen head is located outside the shell, and a tail end of the pen head is located inside the receiving cavity, and the pen head is slidably connected with the shell along an axial direction of the opening; A fixing seat is arranged in the receiving cavity and connected with the shell; A piezoelectric sheet is arranged in the receiving cavity, and a size of the piezoelectric sheet in a first direction is greater than a size of the piezoelectric sheet in a second direction, the first direction is perpendicular to the second direction, the piezoelectric sheet has a first end and a second end in the second direction, the first end is mounted on the fixing seat, and the second end is arranged in a suspended manner; A control assembly is arranged in the receiving cavity and electrically connected with the piezoelectric sheet, when the piezoelectric sheet is deformed, the control assembly sends information of the electronic pen to an interactive smart tablet; The interactive smart tablet system further comprises: When the electronic pen writes on the interactive smart tablet, the piezoelectric sheet of the electronic pen is deformed and generates an electric signal, after the control assembly of the electronic pen detects the electric signal, the control assembly sends information of the electronic pen to the interactive smart tablet according to the electric signal; The interactive smart tablet receives the information of the electronic pen, and generates a handwriting according to the information of the electronic pen and a touch signal generated when the electronic pen writes on the interactive smart tablet.

14. The interactive smart panel system of claim 13, wherein, In the second direction, the piezoelectric sheet has a pressing part abutting against the tail end of the pen head, and the pressing part is closer to the second end than the first end.

15. The interactive smart panel system of claim 14, wherein, In the second direction, the tail end of the pen head is formed with a avoiding space on a side close to the first end, so that the pressing part is closer to the second end than the first end.

16. The interactive smart panel system of claim 13, wherein, In the first direction, the abutting position of the tail end of the pen head and the piezoelectric sheet is located at a middle position of the piezoelectric sheet.

17. The interactive smart panel system of claim 13, wherein, The axial direction of the opening is perpendicular to the piezoelectric sheet.

18. The interactive smart panel system of claim 13, wherein, The control assembly comprises a control board and a metal spring sheet arranged on the control board, the metal spring sheet abuts against the piezoelectric sheet, and the control board is electrically connected with the piezoelectric sheet through the metal spring sheet.

19. The interactive smart panel system of claim 13, wherein, The fixing seat comprises two clamping parts arranged oppositely and spaced apart, and the first end is clamped and fixed between the two clamping parts.

20. The interactive smart panel system of claim 13, wherein, The electronic pen further comprises a limiting seat arranged in the receiving cavity and connected with the shell, along the axial direction of the opening, the limiting seat is arranged on a side of the piezoelectric sheet away from the pen head, and the limiting seat is arranged spaced apart from the piezoelectric sheet.

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