Electronic pen processing method, touch signal acquisition method and electronic pen

Abstract

The application relates to the technical field of electronic pens, and discloses an electronic pen processing method, a touch signal collection method and an electronic pen, wherein the processing method comprises the following steps: providing a shell to be processed; arranging a strain gauge assembly made based on a flexible circuit board mode at a target position of the shell; assembling the shell with a pen core provided with a control circuit; and electrically connecting the strain gauge assembly with the control circuit based on an electrical connection interface of the strain gauge assembly. The flexible circuit board strain gauge assembly is made based on a flexible circuit board process, the strain gauge assembly can be arranged on the shell of the electronic pen, a user can make the strain gauge assembly generate a strain signal by slightly pressing the shell with a finger, and a controller pen core executes a touch function algorithm according to the strain signal. Not only is the accurate detection of a user touch gesture realized, but also a new electronic pen processing method is provided, and the limitation of a capacitive sensor processing scheme is broken through.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic pen, in particular to an electronic pen processing method, a touch signal acquisition method and an electronic pen. BACKGROUND

[0002] Electronic pen is widely used in electronic products such as tablet computers, notebook computers and mobile phones. Through the electronic pen, drawing and writing can be performed on the screen of the above-mentioned electronic products. At present, many electronic pens include a touch function of the electronic pen body. The touch function can interpret different user inputs according to the detected gestures when the user touches the electronic pen body, for example, one touch is to switch the brush, two touches are to adjust the line thickness, or when the pen is in sleep mode, the detection of a large grip area can also wake up the writing function of the pen. At present, the touch function of the electronic pen body is mainly realized by a capacitive touch sensor. The user's gesture signal is detected through the area of the capacitive touch sensor on the pen shell to execute corresponding functions. Because the capacitive sensor needs to be exposed in a certain area of the pen shell, this scheme needs to integrally form the capacitive touch sensor and the pen shell. The size and shape of the capacitive touch sensor have certain requirements, the number of manufacturers with manufacturing capacity is limited, and the manufacturing cost is high. Therefore, a new alternative solution is needed. SUMMARY

[0003] Therefore, the present application provides an electronic pen processing method, a touch signal acquisition method and an electronic pen to solve the problems of single processing method and high cost when processing electronic pens with touch function.

[0004] In a first aspect, the present application provides an electronic pen processing method, which comprises: providing a shell to be processed; setting a strain gauge assembly made based on a flexible circuit board mode at a target position of the shell; assembling the shell with a pen core provided with a control circuit, and electrically connecting the strain gauge assembly with the control circuit based on an electrical connection interface of the strain gauge assembly.

[0005] In some optional embodiments, the step of making the strain gauge assembly based on the flexible circuit board mode comprises: making a strain gauge based on the flexible circuit board mode; and electrically connecting a sampling circuit to the strain gauge by a surface mounting method to obtain the strain gauge assembly, wherein the sampling circuit comprises the electrical connection interface.

[0006] In some optional embodiments, the step of setting the strain gauge assembly made based on the flexible circuit board mode at the target position of the shell comprises: wrapping and pasting the strain gauge assembly around the outer side of the shell; and covering a protective coating on the outer side of the shell wrapped and pasted with the strain gauge assembly.

[0007] In some alternative embodiments, the step of disposing the strain gauge assembly made based on the flexible circuit board at the target position of the shell comprises: wrapping the strain gauge assembly around the inner surface of the shell.

[0008] In some alternative embodiments, the step of disposing the strain gauge assembly made based on the flexible circuit board at the target position of the shell comprises: wrapping the strain gauge assembly around the inner surface of the shell.

[0009] In some alternative embodiments, the step of providing the shell of the electronic pen to be processed comprises: making a first pen barrel and a second pen barrel; forming the embedded groove on the inner surface of the second pen barrel; disposing a first connecting structure at the first opening of the first pen barrel and a second connecting structure at the second opening of the second pen barrel, the first connecting structure and the second connecting structure being used to connect the first pen barrel and the second pen barrel to form the shell.

[0010] In some alternative embodiments, the step of assembling the shell with the refill provided with the control circuit and electrically connecting the strain gauge assembly with the control circuit based on the electrical connecting interface of the strain gauge assembly comprises: disposing the refill in the first pen barrel; providing a conductor spring, one end of the conductor spring being electrically connected with the control circuit, the other end of the conductor spring extending out of the first pen barrel from the first opening; connecting the first pen barrel and the second pen barrel through the first connecting structure and the second connecting structure, so that the other end of the conductor spring extends into the second pen barrel through the second opening and abuts against the electrical connecting interface.

[0011] In some alternative embodiments, the method further comprises: disposing a first cut surface and a second cut surface on the refill, the gap between the first cut surface and the first pen barrel being used to accommodate the conductor spring, and the gap between the second cut surface and the first pen barrel being used to accommodate a wireless charging assembly.

[0012] In a second aspect, the present application provides an electronic pen touch signal acquisition method applied to a control circuit, the method comprising: receiving a strain signal sent by a strain gauge assembly; matching the strain signal with a pre-stored touch strategy; and determining a touch signal for executing a target function according to a matching result.

[0013] In a third aspect, the present application provides an electronic pen, comprising: a shell, a strain gauge assembly and a pen core; the strain gauge assembly is made of a flexible circuit board, the strain gauge assembly is arranged at a target position of the shell, and the strain gauge assembly comprises an electrical connection interface; the pen core is provided with a control circuit, the pen core is located in the shell, and the control circuit is electrically connected with the electrical connection interface.

[0014] In some optional embodiments, the shell comprises a first barrel and a second barrel, an inner embedding groove is formed on an inner surface of the second barrel, the first barrel is provided with a first opening, the first opening is provided with a first connecting structure, the second barrel is provided with a second opening, the second opening is provided with a second connecting structure, and the first connecting structure and the second connecting structure are used to connect the first barrel and the second barrel; at least part of the strain gauge assembly is located in the inner embedding groove, and the electrical connection interface at least partially protrudes from the inner surface of the second barrel; the electronic pen further comprises a conductor spring, the pen core is arranged in the first barrel, one end of the conductor spring is electrically connected with the control circuit, and the other end of the conductor spring extends out of the first barrel from the first opening and extends into the second barrel through the second opening to abut against the electrical connection interface.

[0015] The technical scheme provided by the present application has the following advantages:

[0016] The flexible circuit board strain gauge assembly is made based on a flexible circuit board process, the strain gauge assembly can be arranged on the shell of the electronic pen, slight pressing of the shell by a user's finger causes the strain gauge assembly to deform, thereby generating a strain signal, the strain gauge assembly sends the collected strain signal to the pen core with the control circuit, the control circuit of the pen core performs pressure detection and executes a preset touch function according to the strain signal, for example, a flower brush cutting function. Through this scheme, the slight deformation of the pen shell can generate a strain signal, thereby the slight pressure of the finger can be detected, not only the accurate detection of the user's touch gesture is realized, the accuracy of the pen body pressure detection is significantly improved, but also a new electronic pen processing method is provided, and the limitation of the capacitive sensor processing scheme is broken through. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the specific embodiments or prior art of the present application, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a flowchart of an electronic pen processing method according to an embodiment of the present application;

[0019] Figure 2 is a perspective structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0020] Figure 3 is a second pen barrel structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0021] Figure 4 is a perspective structural schematic diagram of an electronic pen according to an embodiment of the present application;

[0022] Figure 5 is a cross-sectional schematic diagram of a first pen barrel of an electronic pen according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] According to the embodiments of the present application, an electronic pen processing method embodiment is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0025] In the present embodiment, an electronic pen processing method is provided, Figure 1 is a flowchart of an electronic pen processing method according to an embodiment of the present application, which includes the following steps:

[0026] Step S101, providing a shell to be processed;

[0027] Step S102, setting a strain gauge assembly made based on a flexible circuit board mode at a target position of the shell;

[0028] Step S103, assembling the shell with a pen core provided with a control circuit, and electrically connecting the strain gauge assembly with the control circuit based on an electrical connection interface of the strain gauge assembly.

[0029] Specifically, the embodiment of the present application provides a new electronic pen preparation process method. In the embodiment of the present application, the flexible printed circuit (FPC) process is needed. The flexible printed circuit is a kind of highly reliable and excellent flexible printed circuit board made of polyimide or polyester film. The electronic components on the circuit board are not actual electronic components, but are printed by the special material ink, and have the characteristics of high wiring density, light weight, thin thickness and good bending property. The flexible printed circuit generally has double-sided board process and single-sided board process. In the embodiment of the present application, the strain gauge is mainly made by taking advantage of the characteristics of thin thickness and good bending property of the flexible printed circuit, so that the single-sided board process is sufficient. The single-sided board process generally includes the following processes: cutting, drilling, pasting dry film, alignment, exposure, development, etching, film removal, surface treatment, pasting cover film, pressing, curing, surface treatment, nickel plating, character printing, shearing, electrical measurement, punching, final inspection, packaging and delivery. Based on the FPC process, the strain gauge of the flexible printed circuit specification can be made. Then, the sampling circuit is connected to the strain gauge to obtain a strain gauge assembly, so that the strain signal of the strain gauge can be collected.

[0030] The sampling circuit refers to an integrated circuit for collecting the strain signal generated by the strain gauge. The circuit structure of the sampling circuit is a prior art, and the present application will not be described again. The sampling circuit is electrically connected to the strain gauge. The principle of the sampling circuit is that the strain gauge is regarded as a resistor in the circuit. When the strain gauge deforms, the resistance of the strain gauge changes, so that the sampling circuit detects the resistance of the strain gauge, and calculates the resistance value of the strain gauge as a voltage signal based on a preset coefficient. When the resistance of the strain gauge changes, the voltage signal calculated by the sampling resistor changes accordingly. The sampling circuit sends the calculated voltage signal as a strain signal to the control circuit of the electronic pen, so that the detection of the user touch signal can be completed. The control circuit is an integrated circuit chip for analyzing the strain signal and executing corresponding touch control strategy.

[0031] In the embodiment of the present application, the refill refers to a component including a control circuit. The control circuit is an integrated circuit including a processor, a memory, a communication module and other elements, and is used to perform some control functions on the electronic pen. The control circuit is generally made of a PCB (Printed Circuit Board), and then the control circuit is clamped in the middle by two clamping pieces, and is often closed to form a column structure. The column structure is a refill. The refill is a component commonly used in electronic pens. More description of the refill can be referred to related technologies, and the embodiment of the present application will not be described again.

[0032] Finally, the application obtains a shell and a refill provided with a strain gauge assembly. The shell and the refill need to be assembled. When the shell and the refill are assembled, the strain gauge assembly needs to be electrically connected to the control circuit in the refill based on the electrical connection interface of the strain gauge assembly.

[0033] The application is based on a flexible circuit board process to manufacture a flexible circuit board strain gauge assembly. The strain gauge assembly can be arranged on the shell of an electronic pen. When a user slightly presses the strain gauge assembly with a finger, the strain gauge assembly sends the collected strain signal to the refill with a control circuit. The control circuit performs pressure detection and an algorithm for executing a touch function, so as to realize switching of a brush and stroke thickness and other touch functions. Through this scheme, slight deformation of the shell can generate a strain signal, so that slight pressure of the finger can be detected. Not only is accurate detection of a user touch gesture realized, but also the accuracy of pen body pressure detection is significantly improved. In addition, a new electronic pen processing method is provided, which breaks through the limitation of a capacitive sensor processing scheme.

[0034] In some optional embodiments, the step of manufacturing the strain gauge assembly based on the flexible circuit board process includes:

[0035] Step a1, manufacturing a strain gauge based on a flexible circuit board process;

[0036] Step a2, electrically connecting a sampling circuit to the strain gauge through a surface mounting method to obtain a strain gauge assembly, the sampling circuit including an electrical connection interface.

[0037] Specifically, the embodiments of the application electrically connect the sampling circuit to the flexible circuit board strain gauge by using a surface mounting technology. The surface mounting technology (SMT) is a series of process flow names for processing on a circuit board. The surface mounting technology is a circuit connection technology of mounting a surface-mounted component without a pin or a short lead on the surface of a printed circuit board or the surface of another substrate, and welding and assembling by reflow soldering or immersion soldering. By connecting the sampling circuit and the flexible circuit board strain gauge in this way, compared with line connection, the assembly density of the application is high, the electronic product is small in size, light in weight, high in reliability, strong in anti-vibration ability, and low in solder defect rate. The SMT patch has good high-frequency characteristics, reduces electromagnetic and radio frequency interference, is easy to realize automation, improves production efficiency, and can reduce costs by 30%~50%. It is more suitable for establishing electrical connection in a small space such as a shell. In some optional embodiments, the above step S102 includes:

[0038] Step b1, wrapping and pasting the strain gauge assembly on the outer side of the shell;

[0039] Step b2, covering a protective coating on the outer side of the shell wrapped with the strain gauge assembly.

[0040] Specifically, the strain gauge assembly is wrapped around the shell in the shape of a shell column, and in the embodiment of the present application, the position where the strain gauge assembly is wrapped includes the outer side and the inner side of the shell. If the strain gauge is wrapped on the outer side of the electronic shell, the embodiment of the present application covers a protective coating on the outer side of the shell where the strain gauge assembly is wrapped, thereby protecting the circuit of the strain gauge assembly and avoiding erosion by hand sweat, water stains and other factors after long-term use. In this embodiment, the composition of the protective coating is not specially limited and plastic, rubber and the like can be used. Because the strain gauge is sensitive to stress-induced deformation and does not interfere with electricity and magnetism, some metal coatings can also be used. When the user uses the electronic pen, the fingers are close enough to the strain gauge, and the strain gauge is sensitive enough to accurately generate different strain signals according to the user's gestures, thereby generating different electronic pen control functions according to different strain signals.

[0041] When the strain gauge assembly is wrapped around the outer side of the shell, the strain gauge assembly and the control circuit in the pen core can be connected by a wire based on a through hole in the shell, thereby realizing the electrical connection between the two.

[0042] Compared with the electronic pen touch technology of the related art using a capacitive touch sensor, the technical solution provided by the embodiment of the present application does not need to perform a manufacturing process and an integrated molding process of the shell and the capacitive touch sensor material, thereby reducing part of the manufacturing cost. In addition, because the fingers placed on the capacitive touch sensor will definitely cause a change in capacitance, there may be a problem of false detection, which causes the user to not want to switch the electronic pen function and the electronic pen function is switched. The strain gauge assembly using a flexible circuit board detects the touch function, and the sensitivity of the touch detection is moderate. On the one hand, the user needs to exert a slight force to trigger the deformation of the strain gauge and detect the gesture to avoid false touch, and on the other hand, the strain gauge assembly and the shell are well attached, so that a very slight force of the user can be responded to, and a high detection sensitivity is also taken into account.

[0043] In some optional embodiments, the above step S102 includes a step h1 of wrapping the strain gauge assembly around the inner surface of the shell.

[0044] Specifically, if the strain gauge assembly is wrapped on the inner surface of the shell, because the strain gauge assembly is soft, the strain gauge assembly and the shell are more closely attached, and there are few gaps between the two, the pressure generated by the user's slight pressing on the pen shell can also trigger the deformation of the strain gauge, thereby generating a corresponding strain signal, and the touch gesture of the user is also sensitive enough in response. In addition, this scheme allows the shell and the strain gauge assembly to be separately manufactured and then assembled, which is simple to manufacture and significantly reduces the manufacturing cost of the electronic pen. When the strain gauge assembly is wrapped around the inner surface of the shell, the strain gauge assembly and the control circuit in the shell can be connected by a wire, thereby realizing the electrical connection between the two.

[0045] In some optional embodiments, the step S102 comprises:

[0046] Step c1, wrapping the strain gauge assembly around the inner surface of the shell so that at least part of the strain gauge assembly is located in the reserved embedded groove on the inner surface of the shell;

[0047] Step c2, reserving the electrical connection interface on the inner surface of the shell.

[0048] Specifically, the embodiment of the present application reserves an embedded groove around the inner surface of the shell when manufacturing the shell, which is embedded in the shell and inside the shell material, for example, inside the plastic of the plastic shell and is wrapped by the plastic. The embodiment wraps all or part of the strain gauge in the embedded groove so that the strain gauge is closer to the outer side of the shell. Generally, the thickness of the shell is about 1mm, so the distance between the strain gauge assembly and the outer side of the shell can be less than 1mm in general cases. The strain gauge assembly is not only closer to the user's finger and more sensitive to the trigger signal of the user's finger, but also does not need to be protected by a protective coating for the circuit structure of the strain gauge assembly, thereby saving the processing cost.

[0049] Specifically, the process of manufacturing the shell in the embodiment of the present application includes but is not limited to injection molding, 3D printing, turning, bench work, etc. When the shell is made of plastic material, it can generally be manufactured based on injection molding or 3D printing. When the shell is made of metal material, it can be manufactured by turning, bench work, etc.

[0050] As shown in Figure 2 and Figure 3 , after the strain gauge assembly is wrapped in the embedded groove, the strain gauge is inside the shell material and exposes the electrical connection interface of the sampling circuit on the inner surface of the shell. As shown in Figure 4 , it is a three-dimensional structure diagram of the strain gauge assembly embedded around the shell.

[0051] In the embodiment of the present application, since the strain gauge assembly is packaged inside the shell material, it is also necessary to reserve the electrical connection interface of the sampling circuit on the inner surface of the shell in an exposed manner, so that the sampling circuit can be electrically connected with the control circuit in the pen core. The control circuit includes a memory and a processor, the memory stores a pressure detection program, and the processor is used to execute the pressure detection program to output the size of the detected pressure according to the size of the strain signal.

[0052] In the embodiment of the present application, the circuit structures of the sampling circuit and the control circuit are both prior art, and the switching brush and other touch control functions performed according to the strain signal are also prior art, which will not be described here.

[0053] The technical scheme provided by the present application injects the flexible circuit board strain gauge into the material of the shell of the electronic pen, so that the flexible circuit board strain gauge is closer to the outer surface of the shell, and a slight deformation of the shell can generate a strain signal, so that the slight pressure of the fingers can be detected, and the accuracy of the pen body pressure detection is significantly improved.

[0054] In some optional embodiments, the step S101 comprises:

[0055] Step d1, manufacturing a first pen barrel and a second pen barrel;

[0056] Step d2, forming an embedded groove on the inner surface of the second pen barrel;

[0057] Step d3, setting a first connecting structure at the first opening of the first pen barrel and a second connecting structure at the second opening of the second pen barrel, and the first connecting structure and the second connecting structure are used to connect the first pen barrel and the second pen barrel to form a complete shell.

[0058] Specifically, as shown in the figure, Figure 2 When manufacturing the electronic pen, the shell of the electronic pen is divided into two parts, the first part is the first pen barrel, and the second part is the second pen barrel. The manufacturing methods include but are not limited to injection molding, 3D printing, bench work, etc. For example, the pen barrel made of plastic material can be manufactured based on the injection molding and 3D printing methods, and the pen barrel made of metal material can be manufactured by machining methods such as bench work and bench work.

[0059] Among them, the second pen barrel manufactured by the embodiment of the present application is the part close to the pen tip, and the user's fingers usually touch the part close to the pen tip, so the embodiment forms the embedded groove in the second pen barrel. The manufacturing methods of the embedded groove include but are not limited to injection molding, etching, carving, etc. Thus, as shown in the figure, Figure 3 The strain gauge assembly is entirely enclosed in the material of the second pen barrel, and the electrical connection interface of the sampling circuit is exposed on the inner surface of the second pen barrel.

[0060] In addition, the first connecting structure is arranged at the first opening of the first pen barrel, and the second connecting structure is arranged at the second opening of the second pen barrel, and the first connecting structure and the second connecting structure are machining structures for connecting the two openings of the first pen barrel and the second pen barrel to form a complete shell. In the embodiment of the present application, the first / second connecting structure can be a threaded structure, a bayonet structure and a nested structure, etc., as long as the first pen barrel and the second pen barrel can be connected, and the embodiment of the present application is not limited. For example, the threaded structure, assuming that the second connecting structure is a protruding thread, and the first connecting structure is a concave thread, the second pen barrel can be screwed into the concave thread structure of the first pen barrel through the protruding thread structure, and the present application is only used as an example, not limited thereto.

[0061] The shell provided by the embodiment of the present application facilitates disassembly, maintenance, component replacement, etc. of the electronic pen, and provides an advantage for subsequent processor upgrade.

[0062] In some optional embodiments, the step S103 comprises:

[0063] Step e1, setting the refill in the first pen barrel;

[0064] Step e2, providing the conductor spring, so that one end of the conductor spring is electrically connected with the control circuit, and the other end of the conductor spring extends out of the first pen barrel from the first opening;

[0065] Step e3, connecting the first pen barrel and the second pen barrel through the first connecting structure and the second connecting structure, so that the other end of the conductor spring extends into the second pen barrel through the second opening and abuts against the electrical connection interface.

[0066] Specifically, in the embodiment of the present application, the refill of the electronic pen is arranged in the first pen barrel, and the strain gauge assembly composed of the flexible circuit board strain gauge and the sampling circuit is arranged in the second pen barrel. Only the electrical connection interface, such as a metal sheet interface, of the sampling circuit is exposed on the inner surface of the second pen barrel, and other parts are wrapped by the material of the second pen barrel. The electrical connection interface is used to establish electrical connection with the control circuit inside the refill. In the embodiment of the present application, the electrical connection interface includes but is not limited to a reserved power supply interface, a ground interface and a communication interface.

[0067] The technical solution provided by the embodiment of the present application aims to reduce the line connection between elements, so that the conductor spring is arranged on the refill to contact the electrical connection interface in the second pen barrel through the conductor spring, so as to realize electrical connection between the control circuit and the sampling circuit.

[0068] Based on the above idea, the embodiment of the present application first needs to measure the target distance from the electrical connection interface exposed on the inner surface of the second pen barrel to the opening of the second pen barrel, so as to determine that the distance of the conductor spring extending into the second pen barrel cannot be less than the target distance, so as to ensure that the conductor spring can abut against the electrical connection interface of the sampling circuit.

[0069] Then, the refill is arranged in the first pen barrel, and the conductor spring is arranged outside the refill. One end of the conductor spring which does not extend out of the opening of the first pen barrel is electrically connected with the control circuit interface inside the refill through a line, and the other end of the conductor spring extending out of the opening of the first pen barrel needs to be flexibly adjusted according to the target distance, and the position of the refill in the first pen barrel and the length of the conductor spring are adjusted, so as to finally determine that the conductor spring can extend out of the opening of the first pen barrel by the target distance, so that when the first pen barrel and the second pen barrel are connected together, the conductor spring can extend into the second pen barrel and abut against the electrical connection interface of the sampling circuit, so as to ensure accurate connection between the control circuit and the sampling circuit.

[0070] The material of the conductor spring is not specially limited in the embodiments of the present application, and any conductor material capable of transmitting a strain electric signal is within the protection scope of the present application.

[0071] When the first pen barrel and the second pen barrel are connected together through the connecting structure, the conductor spring can extend into the second pen barrel and abut against the exposed electric connection interface in the second pen barrel according to the elastic force, so as to make the signal path between the control circuit and the sampling circuit communicate and form an electric connection. In this way, when the user writes with the electronic pen, the finger pressure of the user can be sensed by the flexible circuit board strain gauge inside the second pen barrel material, a strain signal is generated, the strain signal is collected by the sampling circuit and sent to the control circuit in the first pen barrel, and the control circuit executes a preset touch effect according to the size and frequency of the strain signal, for example, touching once switches the brush, touching twice adjusts the stroke thickness, or when the pen is in a dormant state, the detection of a large gripping area can also wake up the writing function of the pen.

[0072] The technical scheme provided by the embodiments of the present application has no strong connection physical line between the first pen barrel and the second pen barrel, which not only facilitates the disassembly of the electronic pen and facilitates maintenance, but also ensures the connectivity of the pressure detection circuit when the first pen barrel and the second pen barrel are plugged together, and makes full use of the internal space of the two pen barrels, so that the volume of the electronic pen can be reduced, facilitating carrying. In addition, when the low-configuration control circuit cannot support more complex electronic pen functions, the pen core in the first pen barrel can also be replaced, so as to upgrade the control circuit with higher configuration, realizing the hardware upgrade of the electronic pen.

[0073] In some optional embodiments, the electronic pen processing method provided by the present application further comprises:

[0074] f1, a first cut surface and a second cut surface are arranged on the pen core, the gap position between the first cut surface and the first pen barrel is used to accommodate the conductor spring, and the gap position between the second cut surface and the first pen barrel is used to accommodate the wireless charging assembly.

[0075] Specifically, in the embodiments of the present application, the shell is usually a cylindrical body or a polygonal body, and the embodiments of the present application at least reserve two cut surfaces when packaging the pen core, as shown in Figure 5 When the pen core reserves two cut surfaces, a certain gap can be reserved between the pen core and the shell, and the embodiments of the present application can place the wireless charging assembly in the gap position and establish the electric connection between the wireless charging assembly and the control circuit, so that the electronic pen made by the embodiments of the present application can also support the wireless charging function, and no additional space of the electronic pen is occupied, and the advantages of small size, convenient carrying and easy holding of the electronic pen are maintained.

[0076] The other section and the gap between the shell can be used to place the aforementioned conductor sheet to avoid interference between the conductor sheet and the wireless charging assembly.

[0077] According to the embodiment of the present application, an electronic pen touch signal acquisition method is also provided, which is applied to a control circuit, and the method comprises the following steps:

[0078] Step g1, receiving a strain signal sent by the strain gauge assembly;

[0079] Step g2, matching the strain signal with a pre-stored touch strategy;

[0080] Step g3, determining a touch signal for executing a target function according to the matching result.

[0081] Specifically, after the strain signal is acquired, the control circuit matches the acquired strain signal with a pre-stored touch strategy. The pre-stored touch strategy includes a signal relationship table, different strain signal types correspond to different touch strategies, so that the corresponding touch strategy is determined in the table according to the type of the current strain signal, so as to generate a touch signal for executing a target function, which is sent to a corresponding electronic device such as a tablet computer or a mobile phone, to realize the effect of drawing and writing words according to the user's demand. The principle of the electronic pen touch signal acquisition method has been explained in the aforementioned processing method embodiment, and the related description of the aforementioned processing method embodiment can be referred to, and will not be repeated here.

[0082] According to the embodiment of the present application, an electronic pen is also provided, which comprises a shell, a strain gauge assembly and a pen core; the material of the strain gauge assembly is a flexible circuit board, the strain gauge assembly is arranged at a target position of the shell, and the strain gauge assembly comprises an electrical connection interface; the pen core is provided with a control circuit, the pen core is located in the shell, and the control circuit is electrically connected with the electrical connection interface.

[0083] In some optional embodiments, the strain gauge assembly is wrapped and pasted on the inner side or the outer side of the shell.

[0084] In some optional embodiments, the strain gauge assembly is wrapped and pasted on the outer side of the shell, and a protective coating is further covered on the outer side of the shell where the strain gauge assembly is wrapped.

[0085] In some optional embodiments, the strain gauge assembly is wrapped and pasted on the inner surface of the shell.

[0086] In some optional embodiments, the shell comprises a first pen barrel and a second pen barrel, an inner embedding groove is formed on an inner surface of the second pen barrel, the first pen barrel is formed with a first opening, a first connecting structure is arranged at the first opening, the second pen barrel is formed with a second opening, a second connecting structure is arranged at the second opening, and the first connecting structure and the second connecting structure are used to connect the first pen barrel and the second pen barrel; at least part of the strain gauge assembly is located in the inner embedding groove, and the electrical connection interface at least partially protrudes from the inner surface of the second pen barrel; the electronic pen further comprises a conductor spring, the pen core is arranged in the first pen barrel, one end of the conductor spring is electrically connected with the control circuit, and the other end of the conductor spring extends out of the first pen barrel from the first opening and extends into the second pen barrel through the second opening to abut against the electrical connection interface.

[0087] The pen core comprises a first section and a second section, the conductor spring is arranged at a gap position between the first section and the first pen barrel, and a wireless charging assembly is arranged at a gap position between the second section and the first pen barrel.

[0088] Specifically, the principle explanation about the electronic pen product embodiment can refer to the related description of the processing method embodiment, which will not be repeated here.

[0089] Through the electronic pen provided by the application, the flexible circuit board strain gauge is enclosed into the material of the shell during the shell forming process, and the shell is obtained. The strain signal of the flexible circuit board strain gauge is collected by the sampling circuit, and then the strain signal is sent to the control circuit in the pen core, and the control circuit performs the pressure detection algorithm. Through this scheme, the flexible circuit board strain gauge is closer to the outside of the shell, and the slight deformation of the shell can generate a strain signal, so that the light pressure of the finger can be detected, and the accuracy of the pen body pressure detection is significantly improved. In addition, compared with the processing method of the electronic pen with a capacitive sensor, the manufacturing process difficulty is reduced, the cost is reduced, and another alternative solution is realized.

[0090] In some optional embodiments, the control circuit in the pen core can include one or more processors, memories, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are communicatively connected to each other by different buses, and can be installed on a common motherboard or in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in the memory or memory to display GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memories, if necessary. Similarly, multiple computer devices can be connected, each providing part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system).

[0091] The processor can be a central processing unit, a network processing unit, or a combination thereof. The processor can further include a hardware chip. The hardware chip can be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device can be a complex programmable logic device, a field programmable logic device, a general array logic, or any combination thereof.

[0092] The memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method illustrated in the above embodiments.

[0093] The memory can include a program storage area and a data storage area. The program storage area can store an operating system, application programs required by at least one function; and the data storage area can store data created according to the use of the computer device, etc. In addition, the memory can include a high-speed random access memory, and can further include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some optional embodiments, the memory can optionally include a memory disposed remotely with respect to the processor, and these remote memories can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0094] The memory can include a volatile memory, such as a random access memory; the memory can also include a non-volatile memory, such as a flash memory, a hard disk, or a solid-state disk; and the memory can further include a combination of the above types of memories.

[0095] The computer device further includes a communication interface for the computer device to communicate with other devices or a communication network.

[0096] The embodiments of the present application also provide a computer readable storage medium. The above method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded to a local storage medium through network downloading, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid-state disk, etc. Further, the storage medium can further include a combination of the above types of memories. It can be understood that the computer, the processor, the microprocessor control circuit, or the programmable hardware includes a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method illustrated in the above embodiments is implemented.

[0097] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, through the operation of the computer, can invoke or provide the method and / or technical solutions according to the present application. Those skilled in the art should understand that the form of computer program instructions in computer readable medium includes but is not limited to source file, executable file, installation package file and the like, and accordingly, the way of computer program instructions executed by computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0098] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An electronic pen processing method, characterized by, The method comprises: providing a shell to be processed; manufacturing a strain gauge based on a flexible circuit board mode; electrically connecting a sampling circuit to the strain gauge by a surface mounting mode to obtain a strain gauge assembly, the sampling circuit comprising an electrical connection interface; rolling and pasting the strain gauge assembly on the inner surface of the shell so that at least part of the strain gauge assembly is located in a reserved embedded groove on the inner surface of the shell; reserving the electrical connection interface on the inner surface of the shell; assembling the shell with a refill provided with a control circuit, and electrically connecting the strain gauge assembly with the control circuit based on the electrical connection interface of the strain gauge assembly.

2. The method of claim 1, wherein, The strain gauge assembly manufactured based on a flexible circuit board mode comprises: rolling and pasting the strain gauge assembly around the outer side of the shell; covering a protective coating on the outer side of the shell on which the strain gauge assembly is rolled and pasted.

3. The method of claim 1, wherein, The strain gauge assembly manufactured based on a flexible circuit board mode comprises: rolling and pasting the strain gauge assembly around the inner surface of the shell.

4. The method of claim 1, wherein, The providing a shell to be processed comprises: manufacturing a first pen barrel and a second pen barrel; forming the embedded groove on the inner surface of the second pen barrel; providing a first connecting structure at a first opening of the first pen barrel and a second connecting structure at a second opening of the second pen barrel, the first connecting structure and the second connecting structure being used to connect the first pen barrel and the second pen barrel to form the shell.

5. The method of claim 4, wherein, The assembling the shell with a refill provided with a control circuit, and electrically connecting the strain gauge assembly with the control circuit based on the electrical connection interface of the strain gauge assembly comprises: providing the refill in the first pen barrel; providing a conductor spring, one end of the conductor spring being electrically connected with the control circuit, the other end of the conductor spring extending out of the first pen barrel from the first opening; connecting the first pen barrel and the second pen barrel through the first connecting structure and the second connecting structure, so that the other end of the conductor spring extends into the second pen barrel through the second opening and abuts against the electrical connection interface.

6. The method of claim 5, wherein, The method further comprises: providing a first cut surface and a second cut surface on the refill, the gap position between the first cut surface and the first pen barrel being used to accommodate the conductor spring, and the gap position between the second cut surface and the first pen barrel being used to accommodate a wireless charging assembly.

7. An electronic pen touch signal collection method, characterized by, The control circuit applied to the electronic pen processing method provided in any one of claims 1-6, the method comprising: receiving a strain signal sent by the strain gauge assembly; matching the strain signal with a pre-stored touch strategy; determining a touch signal for executing a target function according to a matching result.

8. An electronic pen, characterized by Comprise: a shell, a strain gauge assembly, and a refill; the strain gauge assembly is made of a flexible circuit board, the strain gauge assembly is arranged at a target position of the shell, and the strain gauge assembly comprises an electrical connection interface; the refill is provided with a control circuit, the refill is located in the shell, and the control circuit is electrically connected with the electrical connection interface; The shell comprises a first pen barrel and a second pen barrel, an inner embedding groove is formed on an inner surface of the second pen barrel, the first pen barrel is formed with a first opening, a first connecting structure is arranged at the first opening, the second pen barrel is formed with a second opening, a second connecting structure is arranged at the second opening, and the first connecting structure and the second connecting structure are used for connecting the first pen barrel and the second pen barrel; At least part of the strain gauge assembly is located in the inner embedding groove, and the electric connection interface at least partially protrudes from the inner surface of the second pen barrel; The electronic pen further comprises a conductor spring, the pen core is arranged in the first pen barrel, one end of the conductor spring is electrically connected with the control circuit, the other end of the conductor spring extends out of the first pen barrel from the first opening and extends into the second pen barrel through the second opening to abut against the electric connection interface.

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