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

Abstract

The invention relates to the technical field of electronic pens, and discloses an electronic pen processing method, a touch signal acquisition method and an electronic pen, and the processing method comprises the steps: providing a to-be-processed shell; a strain gauge assembly manufactured based on a flexible circuit board mode is arranged at the target position of the shell; and the shell and the refill provided with the control circuit are assembled, and the strain gauge assembly is electrically connected with the control circuit based on the electric connection interface of the strain gauge assembly. The flexible circuit board strain gauge assembly is manufactured based on the flexible circuit board technology, the strain gauge assembly can be arranged on the shell of the electronic pen, the strain gauge assembly can generate the strain signal by slightly pressing the shell with a finger of a user, and the controller refill executes an algorithm of a touch function according to the strain signal. Accurate detection of the touch gesture of the user is achieved, a novel electronic pen processing method is provided, and the limitation of a capacitive sensor processing scheme is overcome.

Description

Technical Field

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

[0002] Electronic pens are currently widely used in electronic products such as tablet computers, laptops, and mobile phones. Electronic pens can be used to draw and write on the screens of the above electronic products. At present, many electronic pens include a touch function for the electronic pen body. The touch function can be interpreted as different user inputs according to the detected gestures when the user touches the electronic pen body. For example, touching once is to switch the brush, touching twice is to adjust the stroke thickness, or when the pen is dormant, it can also wake up the writing function of the pen if a large grip area is detected. At present, the touch function of the electronic pen body is mainly realized by a capacitive touch sensor, and the user's gesture signal is detected by the area of ​​the capacitive touch sensor on the pen shell to execute the corresponding function. Because the capacitive sensor needs to be exposed in a certain area of ​​the pen shell, this solution requires the capacitive touch sensor and the pen shell to be made into an integrated form. There are certain requirements for the size and shape of the capacitive touch sensor. The number of manufacturers with production capabilities is limited, and the production cost is high, which often cannot meet the production needs of the product. A new alternative is needed. Summary of the invention

[0003] In view of this, the present invention provides an electronic pen processing method, a touch signal acquisition method and an electronic pen to solve the problem of single processing method and high cost when processing an electronic pen with a touch function.

[0004] In a first aspect, the present invention provides a method for processing an electronic pen, the method comprising: providing a shell to be processed; setting a strain gauge assembly made based on a flexible circuit board 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 manufacturing a strain gauge assembly based on a flexible circuit board method includes: manufacturing a strain gauge based on a flexible circuit board method; electrically connecting a sampling circuit to the strain gauge by surface mounting to obtain the strain gauge assembly, wherein the sampling circuit includes the electrical connection interface.

[0006] In some optional embodiments, a strain gauge assembly made based on a flexible circuit board is arranged at the target position of the shell, including: wrapping the strain gauge assembly around the outside of the shell; and covering the outside of the shell with the strain gauge assembly wrapped with a protective coating.

[0007] In some optional implementations, a strain gauge assembly made based on a flexible circuit board is arranged at a target position of the shell, comprising: wrapping the strain gauge assembly around the inner surface of the shell.

[0008] In some optional embodiments, a strain gauge assembly made based on a flexible circuit board is arranged at the target position of the shell, including: rolling the strain gauge assembly on the inner surface of the shell so that at least a portion of the strain gauge assembly is located in an embedded groove reserved on the inner surface of the shell; and reserving the electrical connection interface on the inner surface of the shell.

[0009] In some optional embodiments, the shell of the electronic pen to be processed is provided, including: making a first pen holder and a second pen holder; forming the embedded groove on the inner surface of the second pen holder; setting a first connecting structure at the first opening of the first pen holder, and setting a second connecting structure at the second opening of the second pen holder, the first connecting structure and the second connecting structure are used to connect the first pen holder and the second pen holder to form the shell.

[0010] In some optional embodiments, the shell is assembled with a pen core provided with a control circuit, and the strain gauge assembly is electrically connected to the control circuit based on the electrical connection interface of the strain gauge assembly, including: setting the pen core in the first pen holder; providing a conductor spring sheet, so that one end of the conductor spring sheet is electrically connected to the control circuit, and the other end of the conductor spring sheet extends out of the first pen holder from the first opening; the first pen holder and the second pen holder are connected through the first connecting structure and the second connecting structure, so that the other end of the conductor spring sheet extends into the second pen holder through the second opening and abuts against the electrical connection interface.

[0011] In some optional embodiments, the method further includes: setting a first cross-section and a second cross-section on the pen core, the gap between the first cross-section and the first pen barrel is used to accommodate the conductor spring sheet, and the gap between the second cross-section and the first pen barrel is used to accommodate the wireless charging component.

[0012] In a second aspect, the present invention provides an electronic pen touch signal acquisition method, which is applied to a control circuit. The method includes: 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 based on the matching result.

[0013] In a third aspect, the present invention provides an electronic pen comprising: 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 includes 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 to the electrical connection interface.

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

[0015] The technical solution provided by the present invention has the following advantages:

[0016] The present invention manufactures a flexible circuit board strain gauge assembly based on a flexible circuit board process. The strain gauge assembly can be set on the housing of an electronic pen. When a user's finger slightly presses the housing, the strain gauge assembly is deformed, thereby generating a strain signal. The strain gauge assembly sends the collected strain signal to a pen core with a control circuit. The control circuit pen core performs pressure detection and executes a preset touch function according to the strain signal, such as a flower cutting brush. Through this solution, a slight deformation of the pen shell may generate a strain signal, so that the slight pressure of the finger can be detected, which not only realizes the accurate detection of the user's touch gesture and significantly improves the accuracy of the pen body pressure detection, but also provides a new electronic pen processing method, which breaks away from the limitations of the capacitive sensor processing solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic flow chart of an electronic pen processing method according to an embodiment of the present invention;

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

[0020] Figure 3 is a schematic diagram of the structure of a second pen holder of an electronic pen according to an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a three-dimensional perspective structure of an electronic pen according to an embodiment of the present invention;

[0022] Figure 5 4 is a schematic cross-sectional view of a first pen barrel of an electronic pen according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

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

[0025] In this embodiment, a method for processing an electronic pen is provided. Figure 1 1 is a flow chart of an electronic pen processing method according to an embodiment of the present invention, and the flow chart 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 at a target position of the housing;

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

[0029] Specifically, the embodiment of the present invention provides a new electronic pen preparation process. In the embodiment of the present invention, a flexible printed circuit (FPC) process is required. The flexible printed circuit is a printed circuit board with high reliability and excellent flexibility made of polyimide or polyester film as a substrate. The electronic components on the circuit board are not actual protruding electronic components, but are printed by the above-mentioned special material ink, and have the characteristics of high wiring density, light weight, thin thickness, and good bendability. Usually, the flexible circuit board has a double-sided board process and a single-sided board process. In the embodiment of the present invention, the strain gauge is mainly made by using the thin thickness and good bendability of the flexible circuit board, so it is often sufficient to use a single-sided board process. The single-sided board process usually includes the following processes: cutting → drilling → pasting dry film → alignment → exposure → development → etching → stripping → surface treatment → pasting cover film → pressing → curing → surface treatment → nickel gold deposition → character printing → shearing → electrical measurement → punching → final inspection → packaging → shipping. Based on the FPC process, strain gauges of flexible circuit board specifications can be produced. Afterwards, a sampling circuit is connected to the strain gauge to obtain a strain gauge assembly, thereby being able to collect the strain signal of the strain gauge.

[0030] The sampling circuit refers to an integrated circuit used to collect the strain signal generated by the strain gauge. The circuit structure of the sampling circuit is a prior art and will not be described in detail in the present invention. The sampling circuit is electrically connected to the strain gauge. The principle of the sampling circuit is to regard the strain gauge as a resistor in the circuit. When the strain gauge is deformed, the resistance of the strain gauge will change, 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 will change accordingly. The sampling circuit sends the calculated voltage signal as a strain signal to the control circuit of the electronic pen, and the detection of the user's touch signal can be completed. The control circuit is an integrated circuit chip used to analyze the strain signal and execute the corresponding touch control strategy.

[0031] In the embodiment of the present invention, the refill refers to a component including a control circuit, which is an integrated circuit including components such as a processor, a memory, and a communication module, 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 sandwiched in the middle by two clips, often closed to form a cylindrical structure, which is the refill. The refill is a component that is widely used in electronic pens. For more descriptions of the refill, please refer to the relevant technology, and the embodiment of the present invention will not be repeated.

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

[0033] The present invention manufactures a flexible circuit board strain gauge assembly based on a flexible circuit board process. The strain gauge assembly can be set on the housing of an electronic pen. When a user's finger slightly presses the strain gauge assembly, the strain gauge assembly sends the collected strain signal to a pen core with a control circuit. The control circuit performs pressure detection and executes an algorithm for touch functions, thereby realizing touch functions such as switching brushes and stroke thickness. Through this solution, a slight deformation of the housing may generate a strain signal, thereby detecting the slight pressure of the finger, which not only realizes the accurate detection of the user's touch gesture, significantly improves the accuracy of the pen body pressure detection, but also provides a new electronic pen processing method, breaking away from the limitations of the capacitive sensor processing solution.

[0034] In some optional implementations, the steps of manufacturing a strain gauge assembly based on a flexible circuit board include:

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

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

[0037] Specifically, the embodiment of the present invention uses surface mount technology to electrically connect the sampling circuit to the flexible circuit board strain gauge. Surface mount technology (SMT) is the name of a series of process flows for processing on circuit boards. Surface mount technology is a circuit assembly technology that mounts pinless or short-lead surface mount components on the surface of a printed circuit board or other substrate, and assembles them by soldering or dip soldering. By connecting the sampling circuit and the flexible circuit board strain gauge in this way, compared with line connection, the present invention has high assembly density, small electronic product size, light weight, high reliability, strong vibration resistance, and low solder joint defect rate. SMT patches have good high-frequency characteristics, reduce electromagnetic and radio frequency interference, are easy to automate, improve production efficiency, and can reduce costs by 30% to 50%. They are more suitable for establishing electrical connections inside small spaces such as shells. In some optional embodiments, the above step S102 includes:

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

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

[0040] Specifically, the present invention wraps the strain gauge assembly around the shell in the shape of a cylindrical shell. In the embodiment of the present invention, the position of the rolled strain gauge assembly includes the outside and the inside of the shell. If the strain gauge is rolled on the outside of the electronic shell, the embodiment of the present invention covers the outer side of the shell on which the strain gauge assembly is rolled with a protective coating, thereby protecting the circuit of the strain gauge assembly from being corroded by hand sweat, water stains and other factors after long-term use. In this embodiment, there is no special limitation on the composition of the protective coating, and plastic, rubber, etc. can be used. Because the strain gauge is deformed by induction force and does not interfere with electricity or magnetism, some metal coatings can also be used. When the user uses the electronic pen, the finger is 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 and attached to the outside of the shell, the strain gauge assembly and the control circuit in the pen core can be electrically connected by connecting the strain gauge assembly and the control circuit in the pen core through a through hole penetrating the shell.

[0042] Compared with the electronic pen touch technology using capacitive touch sensors in the related art, the technical solution provided by the embodiment of the present invention does not require the production process and one-piece molding process of connecting the shell and the capacitive touch sensor materials, thereby reducing part of the production cost. In addition, since placing a finger on the capacitive touch sensor will definitely cause a change in capacitance, the problem of false detection may also occur, resulting in the switching of the electronic pen function when the user does not want to switch the electronic pen function. The manufacturing process of the strain gauge assembly using a flexible circuit board is used to detect the touch function, and the sensitivity of the touch detection is more 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 touches. On the other hand, the strain gauge assembly and the shell have good fit, so it can respond to very slight user hand force, while also taking into account a higher detection sensitivity.

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

[0044] Specifically, if the strain gauge assembly is rolled and attached to the inner surface of the shell, since the strain gauge assembly is soft in texture, the strain gauge assembly and the shell fit more closely, and there is little gap between the two. The pressure generated by the user's slight pressure on the pen shell can also trigger the deformation of the strain gauge, thereby generating a corresponding strain signal, and it also has sufficient sensitivity when responding to the user's touch gesture. In addition, this solution allows the shell and the strain gauge assembly to be manufactured separately and then assembled, which is simple to manufacture and significantly reduces the manufacturing cost of the electronic pen. When the strain gauge assembly is rolled and attached to the inner surface of the shell, the strain gauge assembly and the control circuit in the shell can be connected through a line, thereby realizing an electrical connection between the two.

[0045] In some optional implementations, the above step S102 includes:

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

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

[0048] Specifically, in the embodiment of the present invention, when manufacturing the shell, an embedded groove is reserved around the inner surface of 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. In this embodiment, all or part of the strain gauge is rolled in the embedded groove to make the strain gauge closer to the outside of the shell. The shell thickness is usually about 1mm, so under normal circumstances, the distance between the strain gauge assembly and the outside of the shell can be less than 1mm, which is not only closer to the user's finger, but also more sensitive to the user's finger trigger signal, and there is no need to protect the circuit structure of the strain gauge assembly through a protective coating, saving processing costs.

[0049] Specifically, the process of manufacturing the housing in the embodiment of the present invention includes but is not limited to injection molding, 3D printing, lathe work, locksmith work, etc. When the housing is made of plastic material, it can usually be manufactured based on injection molding or 3D printing. When the housing is made of metal material, it can be manufactured by lathe work, locksmith work, etc.

[0050] like Figure 2 and Figure 3 As shown, after the strain gauge assembly is rolled and pasted into the embedded slot, the strain gauge is located inside the shell material, and the electrical connection interface of the sampling circuit is exposed on the inner surface of the shell. Figure 4 The figure shows a three-dimensional structure schematic diagram of a strain gauge assembly embedded in a housing.

[0051] In the embodiment of the present invention, since the strain gauge assembly is encapsulated inside the shell material, it is also necessary to reserve an 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 to 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 so as to output the size of the detection pressure according to the size of the strain signal.

[0052] In the implementation of the present invention, the circuit structures of the sampling circuit and the control circuit are both prior art, and executing touch functions such as switching brushes according to strain signals is also prior art, which will not be repeated here.

[0053] The technical solution provided by the present invention is to inject the flexible circuit board strain gauge into the material of the shell to obtain the shell of the electronic pen, so that the distance between the flexible circuit board strain gauge and the outer surface of the shell is closer. A slight deformation of the shell may generate a strain signal, thereby detecting the slight pressure of the finger, which significantly improves the accuracy of pen body pressure detection.

[0054] In some optional implementations, the above step S101 includes:

[0055] Step d1, making a first pen holder and a second pen holder;

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

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

[0058] Specifically, Figure 2 As shown, when manufacturing an electronic pen according to an embodiment of the present invention, the housing of the electronic pen can be divided into two parts, the first part is the first pen holder, and the second part is the second pen holder. The manufacturing methods include but are not limited to injection molding, 3D printing, bench work, and the like. For example, a plastic pen holder can be manufactured based on injection molding and 3D printing, or a metal sheet can be manufactured into a metal pen holder through machining methods such as turning and bench work.

[0059] The second pen holder made in the embodiment of the present invention is the part close to the pen tip, and the user's fingers usually touch the part close to the pen tip, so the embedded groove is formed in the second pen holder in this embodiment. The manufacturing methods of the embedded groove include but are not limited to injection molding, corrosion, carving, etc. Figure 3 As shown, the strain gauge assembly is entirely enclosed within the material of the second pen holder, and the electrical connection interface of the sampling circuit is exposed on the inner surface of the second pen holder.

[0060] In addition, in the embodiment of the present invention, a first connection structure is provided at the first opening of the first pen holder, and a second connection structure is provided at the second opening of the second pen holder. The first connection structure and the second connection structure are processing structures used to connect the two openings of the first pen holder and the second pen holder together to form a complete shell. In the embodiment of the present invention, the first / second connection structure can be a threaded structure, a bayonet structure, a nested structure, etc., as long as the first pen holder and the second pen holder can be connected, the embodiment of the present invention does not make special limitations. For example, in the threaded structure, assuming that the second connection structure is a protruding thread and the first connection structure is a concave thread, the second pen holder can be screwed into the concave thread structure of the first pen holder through the protruding thread structure. The present invention is only taken as an example and is not limited to this.

[0061] The housing provided by the embodiment of the present invention facilitates the disassembly, maintenance, and component replacement of the electronic pen, and also provides advantages for subsequent processor upgrades.

[0062] In some optional implementations, the above step S103 includes:

[0063] Step e1, placing a refill in the first pen holder;

[0064] Step e2, providing a conductive spring sheet, so that one end of the conductive spring sheet is electrically connected to the control circuit, and the other end of the conductive spring sheet extends out of the first pen holder from the first opening;

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

[0066] Specifically, in an embodiment of the present invention, 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, and only the electrical connection interface of the sampling circuit is exposed on the inner surface of the second pen barrel, such as the metal sheet interface, and the other parts are wrapped by the material of the second pen barrel, and the electrical connection interface is used to establish an electrical connection with the control circuit inside the refill. In an embodiment of the present invention, the electrical connection interface includes but is not limited to a reserved power supply interface, a grounding interface, and a communication interface.

[0067] The technical solution provided by the embodiment of the present invention aims to reduce the line connection between components, so a conductor spring is arranged on the pen core to contact the electrical connection interface in the second pen barrel through the conductor spring, thereby realizing the electrical connection between the control circuit and the sampling circuit.

[0068] Based on the above ideas, the embodiment of the present invention first needs to measure the target distance from the electrical connection interface of the sampling circuit 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 that the subsequent conductor spring extends into the second pen barrel cannot be less than the target distance, ensuring that the conductor spring can abut against the electrical connection interface of the sampling circuit.

[0069] Afterwards, a pen core is arranged in the first pen holder, and a conductor spring is arranged on the outside of the pen core. The end of the conductor spring that does not extend out of the opening of the first pen holder is electrically connected to the control circuit interface inside the pen core through a line, and the end of the conductor spring that extends out of the opening of the first pen holder needs to flexibly adjust the position of the pen core in the first pen holder according to the target distance, and adjust the length of the conductor spring, so as to finally determine that the conductor spring can extend from the opening of the first pen holder to the target distance, so that when the first pen holder and the second pen holder are connected together, the conductor spring can extend into the second pen holder and abut against the electrical connection interface of the sampling circuit, thereby ensuring the accurate connection between the control circuit and the sampling circuit.

[0070] The embodiment of the present invention does not impose any special limitation on the material of the conductive spring. Any conductive material capable of transmitting strain electrical signals is within the protection scope of the present invention.

[0071] Through the technical solution provided by the embodiment of the present invention, when the first pen holder and the second pen holder are connected together through the connection structure, the conductor spring can extend into the second pen holder and abut against the exposed electrical connection interface in the second pen holder according to the elastic force, so that the signal path between the control circuit and the sampling circuit is connected to form an electrical connection. In this way, when the user uses the electronic pen to write, the user's finger pressure can be sensed by the flexible circuit board strain gauge inside the second pen holder material to generate a strain signal, which is collected by the sampling circuit and sent to the control circuit in the first pen holder. The control circuit executes a preset touch effect according to the size and frequency of the strain signal, for example, touching once is to switch the brush, touching twice is to adjust the stroke thickness, or when the pen is dormant, it detects that the gripping area is large and can also wake up the writing function of the pen.

[0072] Through the technical solution provided by the embodiment of the present invention, there is no strongly connected physical line between the first pen holder and the second pen holder, which not only facilitates the disassembly and maintenance of the electronic pen, but also ensures the connectivity of the pressure detection circuit when the first pen holder and the second pen holder are plugged together, and makes full use of the internal space of the two pen holders, which can reduce the size of the electronic pen and facilitate carrying. In addition, when the low-configuration control circuit cannot support more complex electronic pen functions, the pen core in the first pen holder can be replaced, thereby upgrading the control circuit with a higher configuration to achieve hardware upgrade of the electronic pen.

[0073] In some optional implementations, the electronic pen processing method provided by the present invention further includes:

[0074] Step f1, setting a first section and a second section on the pen core, the gap between the first section and the first pen holder is used to accommodate the conductor spring piece, and the gap between the second section and the first pen holder is used to accommodate the wireless charging component.

[0075] Specifically, in the embodiment of the present invention, the housing is usually a cylindrical or polygonal body. In the embodiment of the present invention, at least two sections are retained when packaging the pen core, such as Figure 5 As shown, it is a schematic diagram of the cross section of the shell. When the pen core retains two cross-sections, a certain gap can be reserved between the pen core and the shell. The embodiment of the present invention utilizes the gap position to place the wireless charging component therein and establish an electrical connection between the wireless charging component and the control circuit, so that the electronic pen made by the embodiment of the present invention can also support the wireless charging function, and no additional space is occupied by the electronic pen, thereby maintaining the advantages of the electronic pen being small, easy to carry and easy to hold.

[0076] The gap between the other cut surface and the shell can be used to place the conductive spring provided in the above embodiment, so as to avoid mutual interference between the conductive spring and the wireless charging component.

[0077] According to an embodiment of the present invention, there is also provided an electronic pen touch signal acquisition method, which is applied to a sampling circuit, and the method includes:

[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 control 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 collected, the control circuit of the embodiment of the present invention matches the collected strain signal with the pre-stored touch strategy. The pre-stored touch strategy matching includes a signal relationship table, and different strain signal types correspond to different touch strategies. 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 the target function and send it to the corresponding electronic device such as a tablet computer or mobile phone to achieve the drawing and writing effect required by the user. The principle of the electronic pen touch signal collection method has been explained in the aforementioned processing method embodiment, and the relevant description of the aforementioned processing method embodiment can be referred to, and it will not be repeated here.

[0082] According to an embodiment of the present invention, there is also provided an electronic pen, comprising: 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 includes 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 to the electrical connection interface.

[0083] In some optional embodiments, the strain gauge assembly is wrapped around the inside or outside of the housing.

[0084] In some optional embodiments, the strain gauge assembly is wrapped around the outside of the housing, and a protective coating is also covered on the outside of the housing surrounding the strain gauge assembly.

[0085] In some optional embodiments, the strain gauge assembly is rolled around and attached to the inner surface of the housing.

[0086] In some optional embodiments, the shell includes a first pen holder and a second pen holder, an embedded groove is formed on the inner surface of the second pen holder, a first opening is formed on the first pen holder, a first connecting structure is arranged at the first opening, a second opening is formed on the second pen holder, 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 holder and the second pen holder; at least part of the strain gauge assembly is located in the embedded groove, and the electrical connection interface at least partially protrudes from the inner surface of the second pen holder; the electronic pen also includes a conductor spring sheet, the pen core is arranged in the first pen holder, one end of the conductor spring sheet is electrically connected to the control circuit, and the other end of the conductor spring sheet extends out of the first pen holder from the first opening and extends into the second pen holder 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 holder, and a wireless charging component is arranged at the gap position between the second section and the first pen holder.

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

[0089] With the electronic pen provided by the present invention, during the shell molding process, the flexible circuit board strain gauge is sealed inside the shell material to obtain the shell. 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 a pressure detection algorithm. Through this scheme, the distance between the flexible circuit board strain gauge and the outside of the shell is made closer, and a slight deformation of the shell may generate a strain signal, so that the slight pressure of the finger can be detected, which significantly improves the accuracy of the pen body pressure detection. In addition, compared with the electronic pen processing method of the capacitive sensor, the difficulty of the manufacturing process is reduced, the cost is reduced, and another replacement scheme is realized.

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

[0091] The processor may be a central processing unit, a network processor or a combination thereof. The processor may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0092] The memory stores instructions executable by at least one processor, so that the at least one processor executes the method shown in the above embodiment.

[0093] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

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

[0095] The computer device also includes a communication interface, which is used for the computer device to communicate with other devices or a communication network.

[0096] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium and downloaded through a network, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor control circuit or 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 a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0097] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0098] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for processing an electronic pen, characterized in that: The method comprises: providing a shell to be processed; A strain gauge assembly manufactured based on a flexible circuit board is arranged at a target position of the housing; The housing is assembled with a pen core provided with a control circuit, and the strain gauge assembly is electrically connected to the control circuit based on the electrical connection interface of the strain gauge assembly.

2. The method according to claim 1, characterized in that The steps for making a strain gauge assembly based on a flexible circuit board include: Strain gauges are made based on flexible circuit boards; The sampling circuit is electrically connected to the strain gauge by surface mounting to obtain the strain gauge assembly, and the sampling circuit includes the electrical connection interface.

3. The method according to claim 2, characterized in that The strain gauge assembly made based on a flexible circuit board is arranged at the target position of the housing, including: The strain gauge assembly is wound around the outer side of the housing; A protective coating is covered on the outer side of the housing on which the strain gauge assembly is rolled.

4. The method according to claim 2, characterized in that: The strain gauge assembly made based on a flexible circuit board is arranged at the target position of the housing, including: The strain gauge assembly is wound around the inner surface of the shell.

5. The method according to claim 2, characterized in that: The strain gauge assembly made based on a flexible circuit board is arranged at the target position of the housing, including: Rolling the strain gauge assembly onto the inner surface of the housing so that at least a portion of the strain gauge assembly is located in an embedded groove reserved on the inner surface of the housing; The electrical connection interface is reserved on the inner surface of the shell.

6. The method according to claim 5, characterized in that The step of providing a shell to be processed comprises: Making a first pen holder and a second pen holder; The embedded groove is formed on the inner surface of the second pen holder; A first connecting structure is arranged at the first opening of the first pen holder, and a second connecting structure is arranged at the second opening of the second pen holder. The first connecting structure and the second connecting structure are used to connect the first pen holder and the second pen holder to form the housing.

7. The method according to claim 6, characterized in that The step of assembling the housing and a pen core provided with a control circuit, and electrically connecting the strain gauge assembly and the control circuit based on an electrical connection interface of the strain gauge assembly, comprises: The pen core is arranged in the first pen barrel; Providing a conductive spring sheet, so that one end of the conductive spring sheet is electrically connected to the control circuit, and the other end of the conductive spring sheet extends out of the first pen holder from the first opening; The first pen holder and the second pen holder are connected through the first connection structure and the second connection structure, so that the other end of the conductor spring extends into the second pen holder through the second opening and abuts against the electrical connection interface.

8. The method according to claim 7, characterized in that The method further comprises: A first section and a second section are provided on the pen core, the gap between the first section and the first pen holder is used to accommodate the conductor spring sheet, and the gap between the second section and the first pen holder is used to accommodate the wireless charging component.

9. A method for collecting electronic pen touch signals, characterized in that: Applied to a control circuit, the method comprises: Receive strain signals sent by the strain gauge assembly; Matching the strain signal with the pre-stored touch strategy; A touch signal for executing a target function is determined according to the matching result.

10. An electronic pen, characterized in that: include: Housing, strain gauge assembly and refill; The material of the strain gauge assembly is a flexible circuit board, the strain gauge assembly is arranged at a target position of the housing, and the strain gauge assembly includes 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 to the electrical connection interface.

11. The electronic pen according to claim 10, characterized in that: The housing comprises a first pen holder and a second pen holder, an inner surface of the second pen holder is formed with an embedded groove, the first pen holder is formed with a first opening, a first connecting structure is arranged at the first opening, the second pen holder 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 holder and the second pen holder; At least a portion of the strain gauge assembly is located in the embedded groove, and at least a portion of the electrical connection interface protrudes from the inner surface of the second pen barrel; The electronic pen also includes a conductive spring, the pen core is arranged in the first pen barrel, one end of the conductive spring is electrically connected to the control circuit, and the other end of the conductive 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.

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