Stylus tail module, stylus, touch control system, and stylus control method

Abstract

A stylus tail module, a stylus, a touch control system, and a stylus control method. A stylus cap of the stylus tail module is used for fixedly connecting to a stylus holder and is elastic, a first electrode and a second electrode of the stylus tail module are arranged on the stylus cap in a manner of being spaced apart, and the two electrodes and the stylus cap form a stylus cap assembly, wherein the first electrode is used for being coupled to a contact object to generate an identification signal, when the contact object is a first contact object, the identification signal is a first identification signal used for executing a first function, when the contact object is a second contact object, the identification signal is a second identification signal used for executing a second function, the material of the first contact object is different from that of the second contact object, and the first identification signal is different from the second identification signal; and the second electrode is used for transmitting a coding signal. In this way, the stylus tail module can achieve both a button function and an eraser function, and a function required to be currently executed is determined on the basis of a contact object close to a stylus cap, such that the impact caused by tail shaking can be effectively avoided.

Description

Pen tail module, touch pen, touch control system and touch pen control method

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on October 26, 2023, with application number 202311406879.5 and invention name “Pen tail module, stylus, touch system and stylus control method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of touch sensing technology, and more particularly to a pen tail module, a stylus, a touch system, and a method for controlling the stylus. Background Art

[0003] A stylus pen is an electronic device used to input information into electronic devices, such as but not limited to mobile phones and tablets, through a touchscreen. This allows for more convenient and accurate writing and drawing on these devices. To enhance the user experience, in addition to inputting information into wireless terminals through the pen tip, the end of the stylus pen also features buttons and an eraser.

[0004] A typical stylus has a physical button at the end of the pen, and the erase function is achieved by contacting the touch screen with the end of the physical button. However, this physical button uses a spring or dome structure to obtain its pressing stroke, and its end is in a floating state. When the end of the stylus is used to erase, the end of the stylus is noticeably wobbling, affecting the user experience.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a pen tail module, a stylus, a touch system and a control method for the stylus, which, on the basis of integrating the key function and the eraser function, avoid the tail shaking during operation.

[0007] A first aspect of an embodiment of the present application provides a pen tail module for adapting to the pen body of a stylus pen, the pen tail module comprising a pen cap, a first electrode, and a second electrode; the pen cap is used to be fixedly connected to the pen body and is elastic, the first electrode and the second electrode are spaced apart on the pen cap, and the first electrode, the second electrode and the pen cap form a pen cap assembly; wherein, the first electrode is used to couple with a contact object to generate an identification signal, when the contact object is a first contact object, the identification signal is a first identification signal for executing a first function, and when the contact object is a second contact object, the identification signal is a second identification signal for executing a second function; wherein, the first contact object and the second contact object are made of different materials, and the first identification signal is different from the second identification signal; the second electrode is used to transmit a coding signal.

[0008] With this configuration, different identification signals can be generated by coupling through the first electrode based on contact objects made of different materials. When the contact object is the first contact object, the identification signal is a first identification signal for executing a key function. When the contact object is the second contact object, the identification signal is a second identification signal for executing an eraser function. For example, if the first function is a key and the second function is an eraser, the pen tail module can simultaneously implement both key and eraser functions, and determine the current function to be executed based on the contact object approaching the pen cap.

[0009] Furthermore, thanks to the elastic deformation capability of the pen cap, when a user presses a key, the cap releases the stored deformation energy from compression, and the cap, as it recovers its shape, resets the electrodes. When the user presses the pen cap against the touchscreen to erase, the user experiences a tactile feedback similar to that of a traditional eraser as the force of the erase operation changes, creating a pressure-sensitive eraser that completely eliminates the wobbling sensation associated with traditional physical key erasers. This way, the pen tail module combines both key and eraser functions while effectively preventing the possibility of tail wobbling during erase operations.

[0010] In addition, when the user presses the pen cap against the touch screen to perform an erasing operation, the deformation can be restored as the pressing force decreases. During the erasing operation, the pen cap can always maintain reliable contact with the touch screen, so that the electronic device side responds to the user operation and presents a continuous and stable erasing mark, which can improve the overall user experience.

[0011] Furthermore, due to the structural characteristics of the elastic pen cap, the pen cap does not need to move relative to the pen barrel as a whole during key operation. The connection between the pen cap and the pen barrel can be configured as a glued and sealed connection, or a gap-free fit. This way, when operating with sweaty or wet fingers, compared to traditional physical key solutions, the application of this application solution can prevent moisture from entering the internal circuitry, ensuring operational reliability and further improving the user experience.

[0012] In actual applications, the pen cap can be made of elastic materials, such as but not limited to rubber or TPU, which can produce moderate deformation and provide restoring force when the user applies pressure to meet the corresponding operating function requirements.

[0013] Based on the first aspect, the present application also provides a first implementation of the first aspect: the pen end module further includes a pressure sensor and a pen end bracket. The pressure sensor is fixed to the pen end bracket and is used to detect the pressure applied to the pen end. In this way, by obtaining the user's operating pressure and implementing the key function or eraser function according to the operating instruction, the key function and eraser function share a single pressure-sensing device, which can save design space and reasonably control costs.

[0014] In practical applications, the pressure sensor can be directly fixed on the pen tail bracket, or indirectly fixed on the pen tail bracket through other components.

[0015] Based on the first embodiment of the first aspect, the present application also provides a second embodiment of the first aspect: the pressure sensor is integrated onto a sensor FPC, the sensor FPC including a first end and a second end; the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode are respectively electrically connected to the electrical connection port at the first end of the sensor FPC; the electrical connection port at the first end and the pressure sensor are respectively connected to the second end via wires within the sensor FPC substrate; the electrical connection port at the second end of the sensor FPC is used to electrically connect to the control unit of the stylus. In this way, the sensor FPC combines the functions of a pressure sensor and a wire, has a high degree of integration, and has good assembly processability.

[0016] Exemplarily, the electrical connection port at the first end can be the surface bright copper on the sensor FPC. Based on the relatively large contact area, the electrical connection parts of the two electrodes can be glued to the corresponding surface bright copper through conductive foam to form a reliable electrical connection, and form an electrical connection path through the wires in the sensor FPC6 substrate.

[0017] In other exemplary embodiments, the electrical connection port at the first end may also be a solder pad on the sensor FPC.

[0018] Based on the second embodiment of the first aspect, the present application also provides a third embodiment of the first aspect: the pen tail module further includes a support member and a deformable bearing sheet, the deformable bearing sheet being fixed to the pen tail bracket, and the pressure sensor being located on the deformable bearing sheet; the support member is located between the pen cap assembly and the deformable bearing sheet, and the support member abuts against the pen cap assembly and the deformable bearing sheet respectively to transmit pressure to the deformable bearing sheet. In this way, the force applied to the pen tail can be transmitted to the deformable bearing sheet in sequence through the pen cap, the electrode assembly, and the support member. The pressure sensor located thereon can obtain the user's operating pressure, thereby realizing the key function or eraser function according to the operating instruction.

[0019] In actual application, one of the pen cap assembly and the support member is provided with a force transmission protrusion, and the other is provided with a force transmission recess. The force transmission protrusion can be partially inserted into the force transmission recess and abut against the force transmission recess.

[0020] Based on the third embodiment of the first aspect, the present application also provides a fourth embodiment of the first aspect: the force-transmitting protrusion is disposed on the cap assembly, and the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode are respectively located on either side of the force-transmitting protrusion. Due to good physical insulation, the electrical performance of the first electrode and the second electrode is improved.

[0021] Based on the third embodiment of the first aspect, or the fourth embodiment of the first aspect, the embodiment of the present application also provides a fifth embodiment of the first aspect: the two end portions of the deformation bearing sheet include mounting portions bent toward the pen tail bracket, and the pen tail bracket has a corresponding slot, and the mounting portion of the deformation bearing sheet is inserted and fixed in the slot of the pen tail bracket. In this way, the inserted and adapted mounting portion and slot can provide assembly positioning, and then be welded or glued. On the one hand, it has better assembly processability and can improve the assembly accuracy of the product; on the other hand, it increases the fixed contact area between the two, and the fixed relationship is effectively strengthened.

[0022] Based on the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, the embodiment of the present application also provides a sixth embodiment of the first aspect: the support member includes a pressing portion that abuts against the deformation bearing sheet, and the pressing portion is provided with a metal adapter, and the metal adapter includes a pressing surface that is arranged opposite to the force-bearing surface of the deformation bearing sheet to abut against the deformation bearing sheet. In this way, based on the setting of the metal adapter, the bearing capacity of the support member can be improved, and for the pen tail module with integrated button function and eraser function, stable use reliability can be maintained in scenarios with high operating frequency.

[0023] Exemplarily, the metal adapter and the main body of the support member are formed by injection molding. For example, but not limited to, the main body of the support member can be injection molded by using PC material.

[0024] Based on the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, the present application also provides a seventh embodiment of the first aspect: the support member and the deformation bearing sheet are integrally formed. This has the characteristics of simple structure and good manufacturability.

[0025] Based on the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, the present application also provides an eighth embodiment of the first aspect: the first end of the sensor FPC is bent to the side of the support member opposite the first electrode and the second electrode, and the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode are electrically connected to the corresponding surface bright copper on the first end of the sensor FPC through conductive foam. In this way, the sensor FPC is fully utilized to form a reliable electrical connection, and the product has a high degree of integration.

[0026] Based on the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, the embodiments of the present application further provide a ninth embodiment of the first aspect: the pen tail module further includes a limiter that can limit the pressing stroke of the pen cap assembly. Thus, as the pressing force of the pen tail gradually increases, the limiter can generate a reaction force to prevent the deformation bearing plate from being crushed, thereby protecting the working state of the pressure sensor.

[0027] Exemplarily, the limiting portion is a fixed limiting baffle. Accordingly, the support member includes a limiting surface. In the pressing direction of the cap assembly, a gap is defined between the limiting surface of the support member and the limiting baffle to limit the pressing stroke of the cap assembly. As the pressing force of the pen end gradually increases, the gap decreases until the limiting surface of the support member presses against the limiting baffle. This contact between the limiting surface and the limiting baffle effectively controls the maximum displacement of the deformable bearing plate, ensuring its reliability.

[0028] As another example, the pen cap assembly may also include a limiting surface with a limiting baffle. In the pressing direction of the pen cap assembly, there is a distance between the limiting surface of the pen cap assembly and the limiting baffle to limit the pressing stroke of the pen cap assembly.

[0029] In addition, exemplarily, the limiting portion is arranged in the middle part of the pen tail bracket, and in the pressing direction of the pen cap assembly, there is a distance between the limiting portion and the deformation bearing piece to limit the pressing stroke of the pen cap assembly; or, there is a distance between the limiting portion and the pressure sensor on the deformation bearing piece to limit the pressing stroke of the pen cap assembly.

[0030] Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect, the embodiment of the present application also provides a tenth embodiment of the first aspect: the first electrode and the second electrode are mounted on an electrode bracket, and the force transmission protrusion of the pen cap assembly is formed on the electrode bracket.

[0031] In a specific implementation, the body of the first electrode and the body of the second electrode are located on opposite sides of the electrode holder and the pen cap, and the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode both extend from the electrode holder to establish corresponding electrical connections. This structure is simple and easy to implement.

[0032] For example, the first electrode, the second electrode and the electrode support of the electrode assembly can be formed by injection molding, which can further improve the processability and reasonably control the product precision.

[0033] Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect, the embodiment of the present application further provides an eleventh embodiment of the first aspect: the first electrode, the second electrode and the pen cap of the pen cap assembly are formed by injection molding. In a specific implementation, the force-transmitting protrusion of the pen cap assembly is formed on the first electrode, or on the second electrode. With this arrangement, the transmission efficiency of the pressing force is relatively high.

[0034] Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect, or the tenth embodiment of the first aspect, or the eleventh embodiment of the first aspect, the embodiment of the present application further provides a twelfth embodiment of the first aspect: in a plane perpendicular to the length direction of the pen tail module, the projection of the body of the first electrode is circular, and the projection of the body of the second electrode is annular, and is arranged outside the body of the first electrode. In this arrangement, the body of the first electrode is located on the inside, and a relatively large electrode area can be set to ensure that a large signal amount is obtained after contact with the contact object; the annular second electrode body is arranged outside the first electrode body, which can meet the coding signal communication without dead angles within the entire circumference, thereby improving the accuracy of identifying and determining the current erasing position.

[0035] In other practical applications, in a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode is circular, and the projection of the body of the first electrode is annular and is sleeved on the outside of the body of the second electrode.

[0036] In another practical application, in a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode is a "cross" shape, and the projection of the body of the first electrode is a circular ring, and is arranged on the outside of the body of the second electrode.

[0037] In another practical application, in a plane perpendicular to the length of the pen tail module, the projection of the second electrode body is a "cross" shape, the projection of the first electrode body is four arc segments spaced circumferentially, and the four extended ends of the second electrode are respectively located between two adjacent arc segments of the first electrode body. Of course, in other possible implementations, the projection of the second electrode body can also be another number of extended ends arranged radially outward from the center, and correspondingly, the projection of the first electrode body is another number of arc segments spaced circumferentially, with each extended end respectively located between two adjacent arc segments of the first electrode body.

[0038] Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or the fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect, or the tenth embodiment of the first aspect, or the eleventh embodiment of the first aspect, or the twelfth embodiment of the first aspect, the embodiment of the present application also provides a thirteenth embodiment of the first aspect: the pen cap includes a pressing portion and a connecting portion, the pressing portion is located in the middle of the pen cap, the connecting portion is located at the periphery of the pen cap, and the outer peripheral surface of the connecting portion has a glue groove. In this way, when the pen cap is bonded and fixed to the inner wall of the pen body, the glue layer formed based on the glue-containing space formed by the glue groove ensures a stable connection between the pen cap and the pen body.

[0039] In practice, the pen cap's pressing portion can have a protruding curved profile, and accordingly, the electrode assembly, which mates with the inner wall of the pressing portion, also has a protruding curved profile. This arrangement allows the user to tilt the pen to perform functions, further enhancing the user experience. This improvement is particularly noticeable when using the eraser function.

[0040] A second aspect of an embodiment of the present application provides a stylus pen, which includes a pen body and the pen tail module as described above. The pen tail module is fixedly arranged at the tail of the pen body, and the pen cap of the pen tail module is fixedly connected to the pen body.

[0041] For example, the pen barrel may be a hollow structure, and the pen cap and the inner wall of the pen barrel may be fixed by gluing.

[0042] A third aspect of an embodiment of the present application provides a touch control system, including an electronic device having a touch screen and a stylus compatible with the electronic device, wherein the stylus is the stylus as described above.

[0043] A fourth aspect of the present application provides a method for controlling a stylus, the stylus including the aforementioned pen end module. The method comprises the following steps: obtaining an identification signal generated by coupling a first electrode with a contact object; executing a first function when the identification signal is a first identification signal; and executing a second function when the identification signal is a second identification signal. Different identification signals can be generated by coupling with the first electrode based on contact objects made of different materials. For example, if the first function is a key function and the second function is an eraser function, the function to be executed can be determined based on a finger approaching the pen cap or the touch screen.

[0044] Based on the fourth aspect, the embodiments of the present application further provide a first implementation of the fourth aspect: executing the first function includes: obtaining first pressure data collected by a pressure sensor, and outputting a first control signal for executing the first function based on the first pressure data. For example, outputting a key press event, the first control signal is used by the electronic device to execute the key press function. When the pressure data does not reach a key press threshold, the key press event is released.

[0045] Based on the fourth aspect, or the first embodiment of the fourth aspect, the embodiment of the present application also provides a second embodiment of the fourth aspect: the execution of the second function includes: outputting a coding signal through the second electrode, obtaining second pressure data collected by the pressure sensor, and outputting a second control signal for executing the second function according to the second pressure data. For example, an eraser event is output, and the second control signal is used for the electronic device to execute the eraser function. When the pressure data does not reach the eraser operation threshold, the eraser event is released.

[0046] In actual applications, the second control signal for executing the second function is output when the pressure data is greater than the trigger threshold of the second function; when the end of the pen touches or approaches the touch screen, the eraser function can be awakened by erasing hard, and it is in the off state in other scenarios, thereby reducing the power consumption of the product.

[0047] Based on the fourth aspect, or the first embodiment of the fourth aspect, or the second embodiment of the fourth aspect, the embodiment of the present application further provides a third embodiment of the fourth aspect: before obtaining the identification signal generated by the coupling of the first electrode and the contact object, the pressure sensor collects third pressure data, and if the third pressure data meets a preset condition, the step of obtaining the identification signal generated by the coupling of the first electrode and the contact object is executed. In other words, the identification signal generated by the coupling of the first electrode and the contact object is obtained based on the pressure data collected by the pressure sensor. When the pen tail module function is enabled, it is based on the condition that the pen tail applies a pressing force and couples with the contact object to generate a corresponding identification signal. In this way, the first function or the second function can be avoided from being triggered by mistake. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a schematic diagram of the overall structure of a touch control system provided in an embodiment of the present application;

[0049] FIG2 is a schematic diagram of the assembly relationship of a pen tail module provided in an embodiment of the present application;

[0050] FIG3 is an exploded view of the assembly of the pen tail module shown in FIG2 ;

[0051] FIG4 is a schematic diagram of a use state of the pen tail module shown in FIG2;

[0052] FIG5 is a schematic diagram of another usage state of the pen tail module shown in FIG2;

[0053] FIG6 is a schematic diagram of another usage state of the pen tail module shown in FIG2;

[0054] FIG7 is a schematic diagram of the assembly relationship of the electrode assembly shown in FIG3;

[0055] FIG8 is a schematic diagram of an assembly relationship of the pen tail module shown in FIG3;

[0056] FIG9 is a schematic diagram showing the assembly relationship between the conductive foam and the sensor FPC shown in FIG8 at another angle;

[0057] FIG10 is a schematic diagram of the bending assembly relationship of the sensor FPC shown in FIG3;

[0058] FIG11 is a schematic diagram of the flattened state of the sensor FPC shown in FIG9 ;

[0059] FIG12 is an AA cross-sectional view of the pen tail module shown in FIG3;

[0060] FIG13 is a schematic diagram of another use state of the pen tail module shown in FIG3;

[0061] FIG14A is a schematic diagram showing the positional relationship among the limit baffle, the support member, and the deformation bearing sheet shown in FIG3 ;

[0062] FIG14B is a schematic diagram showing the positional relationship of the support member shown in FIG3 pressing against the limit baffle;

[0063] FIG15A is a schematic diagram showing the position relationship of another limiting baffle in an initial state provided by an embodiment of the present application;

[0064] FIG15B is a schematic diagram showing the positional relationship of the pen cap pressed against the limit baffle shown in FIG15A;

[0065] FIG16A is a schematic diagram showing the position relationship of another limiting baffle in an initial state provided by an embodiment of the present application;

[0066] FIG16B is a schematic diagram showing the positional relationship of the deformation bearing sheet pressed against the limit baffle shown in FIG16A;

[0067] FIG17 is a schematic diagram of the assembly relationship of another pen tail module provided in an embodiment of the present application;

[0068] FIG18 is a schematic diagram of the overall structure of another pen tail module provided in an embodiment of the present application;

[0069] FIG19 is a schematic diagram of an assembly relationship of the pen tail module shown in FIG18;

[0070] FIG20 is a BB cross-sectional view of the pen tail module shown in FIG18;

[0071] FIG21 is a schematic diagram of the assembly relationship between the deformation bearing sheet and the pen tail bracket shown in FIG18;

[0072] FIG22 is a schematic diagram of the assembly relationship between the support member and the sensor FPC shown in FIG18;

[0073] FIG23 is a schematic diagram of the bending assembly relationship of the sensor FPC shown in FIG18;

[0074] FIG24 is a schematic diagram of the assembly relationship of the pen cap assembly shown in FIG18;

[0075] FIG25A is a projection view of a first electrode and a second electrode provided in an embodiment of the present application;

[0076] FIG25B is a projection view of another first electrode and a second electrode provided in an embodiment of the present application;

[0077] FIG25C is a projection view of another first electrode and a second electrode provided in an embodiment of the present application;

[0078] FIG25D is a projection view of another first electrode and a second electrode provided in an embodiment of the present application;

[0079] FIG26 is a flowchart of a stylus control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] The embodiment of the present application provides a solution for implementing a pen tail module that integrates button functions and eraser functions, which can effectively avoid the impact of tail shaking.

[0081] Typically, a stylus pen serves as an input device for electronic devices, allowing operations such as writing and drawing on the touch screen of the electronic device. Referring to Figure 1 , this figure shows a schematic diagram of the overall structure of a touch control system provided in an embodiment of the present application. The touch control system includes a stylus pen 100 and an electronic device 200. For ease of description, Figure 1 illustrates electronic device 200 as a tablet computer.

[0082] The stylus 100 can provide input to the electronic device 200, and the electronic device 200 can perform corresponding operation functions based on the input of the stylus 100. Among them, electrodes can be set in the tip of the stylus 100, and coding signals are emitted through the electrodes. The touch screen 201 of the electronic device 200 that interacts with the stylus 100 can be integrated with an electrode array, that is, a capacitive electrode array adapted to the electrodes on the side of the stylus. The electronic device 200 receives the coding signal from the stylus 100 through the electrode array, identifies the position of the tip of the stylus 100 on the touch screen 201 based on the change in the capacitance value on the touch screen 201, and realizes operation functions such as writing and drawing.

[0083] In a specific implementation, the stylus 100 and the electronic device 200 can be interconnected via a wireless communication network to implement wireless signal interaction. The communication network can be, but is not limited to, a short-range communication network such as a Wi-Fi hotspot network, a Wi-Fi peer-to-peer (P2P) network, a Bluetooth network, a ZigBee network, or a near-field communication (NFC) network. This is not limited in the present embodiment.

[0084] A typical stylus has a physical button at the end of the pen, which interacts with the electronic device 200 through the button function. Furthermore, the erase function is achieved by contacting the touch screen with the end of the physical button. However, due to the limited pressing stroke of the physical button, the end of the physical button floats. When the eraser function is activated, the end of the physical button can be felt to move, affecting the user experience.

[0085] Based on this, an embodiment of the present application provides a pen tail module for adapting to the pen body of a stylus pen, and the pen tail module includes an elastic pen cap, a first electrode, and a second electrode; wherein the pen cap is used to connect to the pen body, and the first electrode and the second electrode are arranged on the pen cap at intervals; the first electrode is used to couple with the contact object to generate an identification signal. When the contact object is the first contact object, the identification signal is a first identification signal for executing the first function. When the contact object is the second contact object, the identification signal is a second identification signal for executing the second function; the first contact object and the second contact object are made of different materials, and the first identification signal is different from the second identification signal, so as to identify and confirm the function that needs to be executed when the user operates the pen tail module; the second electrode is used to emit a coding signal.

[0086] Here, the elastic pen cap can be made of an elastic material, such as but not limited to rubber or TPU (Thermoplastic Urethane) material, which can produce moderate deformation and provide restoring force when the user applies pressure, so as to meet the corresponding operational function requirements. The first function can be a key function, and the second function can be an eraser function or a marker function, or a function related to a drawing application, which is not limited in the embodiments of the present application. Taking the first function as a key function and the second function as an eraser function as an example, the user's finger pressing the pen cap can achieve the pressing stroke requirement of the key function, and restore the original shape when the finger is lifted; for another example, when the user presses the pen cap against the touch screen to achieve the eraser function, the force change feedback is provided, and the deformation is restored when the pressing force is reduced, so as to maintain reliable contact with the touch screen during the erasing operation.

[0087] With this configuration, different recognition signals can be generated by coupling through the first electrode based on the contact object's material. When the contact object is the first, the recognition signal is the first recognition signal for executing a key function; when the contact object is the second, the recognition signal is the second recognition signal for executing an eraser function. In other words, the pen end module can simultaneously implement both key and eraser functions, and can determine the current function based on the contact object approaching the pen cap. Furthermore, thanks to the elastic deformability of the pen cap, when a user executes a key function, the cap releases its stored deformation energy, and the cap, as it recovers its shape, resets the electrode. When the user presses the pen cap against the touchscreen to erase, the user experiences a tactile feedback similar to that of a traditional eraser as the force of the erase operation changes, creating a pressure-sensitive eraser that completely eliminates the jerky feel of traditional physical keys. Furthermore, the cap recovers its deformation when the pressure decreases, ensuring consistent contact with the touchscreen during the erase operation. This ensures a continuous and stable erase trace on the electronic device, improving the overall user experience.

[0088] Furthermore, due to the structural characteristics of the elastic pen cap, the pen cap does not need to move relative to the pen barrel as a whole during key operation. The connection between the pen cap and the pen barrel can be configured as a glued and sealed connection, or a gap-free fit. This way, when operating with sweaty or wet fingers, compared to traditional physical key solutions, the application of this application solution can prevent moisture from entering the internal circuitry, ensuring operational reliability and further improving the user experience.

[0089] To better understand the technical solutions and effects of this application, without loss of generality, a specific embodiment will be described in detail below with reference to the accompanying drawings, with the key and eraser functions serving as the basis for describing the functions of the pen tail module. Please refer to Figures 2 and 3 , where Figure 2 is a schematic diagram of the assembly relationship of a pen tail module provided in an embodiment of this application, and Figure 3 is an exploded view of the assembly of the pen tail module shown in Figure 2 .

[0090] As shown in Figure 2, the end module 10 of the stylus pen 100 is located at the end of the pen body 20. In this embodiment, the pen body 20 is hollow, with the main structure of the end module 10 embedded within the pen body 20. After assembly, the elastic pen cap 1 is fixed to the pen body 20, with its surface exposed on the pen body 20, providing the key and eraser functions. The overall appearance is excellent.

[0091] As shown in Figure 3, the pen end module 10 includes a pen cap 1, an electrode assembly 2, a sensor FPC (Flexible Printed Circuit) 6, and a pen end bracket 8. The electrode assembly 2 is fixedly connected to the pen cap 1, and the sensor FPC 6 is equipped with a pressure sensor 61, which is fixed to the pen end bracket 8.

[0092] In this embodiment, the electrode assembly 2 includes a first electrode 21 and a second electrode 22. The surfaces of the first electrode 21 and the second electrode 22 opposite to the pressing portion of the pen cap 1 are respectively in contact with the inner wall surface of the pressing portion 11, so as to have good interactive response capabilities in the working state. Here, the pen cap 1 includes a pressing portion 11 and a connecting portion 12. The connecting portion 12 is located at the periphery of the pen cap 1 and is used to be bonded and fixed to the inner wall of the pen barrel 20. The pressing portion 11 is located on the inner side of the connecting portion 12 to apply a pressing force at the end of the pen, for example, but not limited to, applying a pressing force to realize the key function and the eraser function. The material of the pen cap 1 can be selected from a material with a Rockwell hardness of less than 90A and greater than 60A to take into account the needs of both the key and eraser functions.

[0093] The first electrode 21 is used to couple with the contact object to generate an identification signal, that is, a capacitance signal detection electrode, and the second electrode 22 is used to transmit a coding signal, that is, a coding communication electrode.

[0094] When the contact object is a first contact object, the identification signal is a first identification signal for executing a key function, where the "first contact object" can be a finger of the user. As shown in Figure 4, when the finger approaches or contacts the first electrode 21, the operating finger is equivalent to the other plate of the capacitor. Based on the physical properties of the finger, the two are coupled to form a first capacitor and generate a first capacitance value; at this time, based on the specific elasticity of the pen cap 1, the pen tail module 10 can be operated to execute the key function. After the finger presses the pen cap, the generated command signal is interacted to the electronic device 200 side, and the electronic device can execute the key function according to the specific function setting. For example, in the reading interface, pressing the button once will turn the page back, and pressing the button twice in a row will turn the page forward. It should be understood that the key function setting can be determined according to the overall design requirements of the product, and the embodiment of the present application is not limited thereto.

[0095] When the contact object is a second contact object, the identification signal is a second identification signal for executing the eraser function. Here, the "second contact object" can be the touch screen 201 of the electronic device. As shown in Figure 5, when the tail end of the pen tail module 10 approaches or contacts the touch screen 201, based on the physical properties of the material of the touch screen 201, the two are coupled to form a second capacitor and generate a second capacitance value. At this time, the operation of the pen tail module 10 can execute the eraser function. As the user manipulates the stylus 100 to move relative to the touch screen 201, as shown in Figure 6, the electronic device 200 can identify and determine the current erasure position based on the coding signal emitted by the second electrode 22 and the change in the capacitance value on the touch screen 201, forming a corresponding erasure mark. At the same time, the pressure signal generated by the change in the user's force can be synchronously interacted with the electronic device 200 side, and the erasure effect can be adjusted based on the change in the pressure signal, for example, but not limited to adjusting the width of the erasure mark, or adjusting the transparency of the erasure mark.

[0096] In a possible implementation, the "first contact object" can also be another object made of a different material than the second contact object. For example, but not limited to, a Band-Aid placed on a user's finger, with the Band-Aid-covered finger pressing the pen cap to activate a key function. Alternatively, the first contact object can be a tabletop, with the pen tip pressed against the tabletop to activate a key function. In other words, as long as the material of the "first contact object" is different from that of the touch screen 201, it can couple with the first electrode 21 to produce different capacitance values.

[0097] Similarly, in other possible implementation schemes, the "second contact object" can also be other objects with different materials from the first contact object, such as but not limited to a touch panel connected to the electronic device 200 for communication, which can also realize the function confirmation of the pen tail module 10.

[0098] Please also refer to FIG7 , which is a schematic diagram of the assembly relationship of the electrode assembly shown in FIG3 .

[0099] As shown in Figures 3 and 7 , the first electrode 21 and the second electrode 22 can be assembled on the electrode bracket 23 to form an electrode assembly 2. The body of the first electrode 21 is circular and has a first electrical connection portion 211 extending toward the pen shaft side; the body of the second electrode 22 is annular and has a second electrical connection portion 221 extending toward the pen shaft side. The body of the second electrode 22 is sleeved on the outside of the body of the second electrode 22. In other specific implementations, the body shapes of the first electrode 21 and the second electrode 22 are not limited to those shown in the figures, and are not limited in this embodiment of the present application.

[0100] Correspondingly, the surface of the electrode holder 23 opposite the pen cap 1 has a first recessed portion 231 and a second recessed portion 232. The first recessed portion 231 is located in the middle and has a first through-hole 2311 that extends through the body of the electrode holder 23. The body of the first electrode 21 is embedded in the first recessed portion 231. The second recessed portion 232 is located on the outer ring of the first recessed portion 231 and has a second through-hole 2321 that extends through the body of the electrode holder 23. The body of the second electrode 22 is embedded in the second recessed portion 232. After assembly, the first electrical connection portion 211 of the first electrode 21 extends through the first through-hole 2311, and the second electrical connection portion 221 of the second electrode 22 extends through the second through-hole 2321. In other words, the electrical connection portions of both electrodes extend from the electrode holder 23 to achieve electrical connection between them.

[0101] In a specific implementation, after the electrode assembly 2 is assembled, it can be further fixed to the pen cap 1 to form a pen cap assembly, and then the overall assembly can be carried out. For example, but not limited to, a gluing process can be used to achieve pre-assembly and fixation of the electrode assembly 2 and the pen cap 1. The pen cap assembly also has a force-transmitting protrusion 233 for assembly with the support member. This force-transmitting protrusion 233 is located on the side of the electrode bracket 23 that is opposite the pen cap 1.

[0102] In this embodiment, the pressing portion 11 of the pen cap 1 has a protruding curved outer profile. Correspondingly, the electrode assembly 2, which contacts the inner wall of the pressing portion 11, also has a protruding curved outer profile. This arrangement allows the user to tilt the pen to perform functions, further enhancing the user experience. This improvement is particularly noticeable when using the eraser function.

[0103] To improve the electrical performance of the first electrode 21 and the second electrode 22, the first electrical connection portion 211 and the second electrical connection portion 221 are optionally spaced apart. For example, the first electrical connection portion 211 and the second electrical connection portion 221 shown in the figure are respectively disposed on either side of the force-transmitting protrusion 233. Furthermore, optionally, the first electrical connection portion 211 can be located at the outer edge of the first electrode 21 to increase the distance between it and the second electrical connection portion 221. On this basis, a corresponding avoidance recess 222 can be provided at the inner edge of the body of the second electrode 22 to ensure physical insulation between the second electrode 22 and the first electrical connection portion 211, thereby meeting the electrical performance requirements of the two electrodes.

[0104] In addition, the first electrical connection portion 211 and the second electrical connection portion 221 can be electrically connected to the sensor FPC 6 via conductive foam to achieve a reliable electrical connection. Please refer to Figures 3, 8, and 9. Figure 8 is a schematic diagram of one assembly relationship of the pen tail module shown in Figure 3, and Figure 9 is a schematic diagram of another angled assembly relationship of the conductive foam and sensor FPC shown in Figure 8.

[0105] As shown in FIG8 and FIG9 , the sensor FPC 6 has the functions of both a pressure sensor 61 and a wire, has a high degree of integration, and has good assembly processability.

[0106] The first end 62 of the sensor FPC 6 is bent to a side opposite to the electrical connection portion of the two electrodes and can be disposed on the support member 4. Please also refer to FIG11 , which is a schematic diagram of the flattened state of the sensor FPC shown in FIG9 .

[0107] As shown in Figure 11, the first end 62 includes two electrical connection ports 621, which are respectively provided to correspond to the first electrical connection portion 211 of the first electrode 21 and the second electrical connection portion 221 of the second electrode 22. The first electrical connection portion 211 is connected to the corresponding electrical connection port on the first end 62 through the first conductive foam 31, and the second electrical connection portion 221 is connected to the corresponding electrical connection port on the first end 62 through the second conductive foam 32.

[0108] The electrical connection port 621 can be the bright copper surface of the sensor FPC 6. The conductive foam can be bonded to the corresponding bright copper surface using conductive adhesive. This relatively large contact area allows for a reliable electrical connection. After assembly, the first and second electrical connection portions 211 and 221 of the two electrodes are respectively connected to the first and second conductive foams 31 and 32, forming an electrical connection path through the wires 64 within the sensor FPC 6 substrate.

[0109] In other specific implementations, the electrical connection port may also be a pad structure provided on the sensor FPC 6, and the electrical connection can also be achieved through the sensor FPC 6. This embodiment of the present application is not limited thereto.

[0110] As shown in Figure 9, the support member 4 includes a force-transmitting recess 41 and a pressing portion 42. The force-transmitting recess 41 is arranged opposite to the force-transmitting protrusion 233 of the pen cap assembly. The force-transmitting protrusion 233 can be partially inserted into the force-transmitting recess 41 of the support member 4 and abut against the force-transmitting recess 41 to transmit the pressing force through the support member 4. For example, but not limited to, the contact surfaces of the two can be fixed by glue. In other possible implementation schemes, the abutting and adapted force-transmitting protrusion and force-transmitting recess can also be reversely arranged between the pen cap assembly and the support member, that is, the force-transmitting recess is arranged on the pen cap assembly side, and the force-transmitting protrusion is arranged on the support member side (not shown in the figure), which can also take into account good assembly positioning and transmission of pressing force.

[0111] The pressing portion 42 is located on the other side of the support member 4 away from the force-transmitting recess 41 and can abut against the force-bearing surface 51 of the deformation bearing sheet 5. Here, the pressing portion 42 on the support member 4 can be a structure protruding from the support member 4 body, or it can be the outer surface of the support member 4 body. In other words, the pressing portion 42 does not have to protrude from the support member 4 body.

[0112] In this embodiment, the deformation bearing sheet 5 is fixedly mounted on the pen end bracket 8, and the pressure sensor 61 of the sensor FPC 6 is fixedly attached to the detection surface 52 of the deformation bearing sheet 5. Please also refer to Figure 12, which is a cross-sectional view of the pen end module shown in Figure 3, formed along the AA section shown in Figure 3.

[0113] As shown in Figure 12 , the force F applied to the pen tip is transmitted sequentially through the pen cap 1, electrode assembly 2, and support member 4 to the deformable carrier 5. Pressure sensor 61, covering its detection surface 52, detects the user's operating pressure and, based on the user's input, implements either a key or eraser function. Sharing a single pressure-sensing device for both the key and eraser functions saves design space and minimizes costs.

[0114] In a specific implementation, the pressure sensor 61 can be four resistance strain gauges disposed within the sensor FPC 6 shown in Figure 11, forming a full-bridge circuit. During operation, the deformation of the deformation bearing plate 5 can be converted into an electrical signal, such as, but not limited to, a voltage signal. When a pressing force is input at the end of the pen, a detection voltage is obtained through the full-bridge circuit. Specifically, within the strength range of the deformation bearing plate 5, the greater the pressing force, the greater the deformation of the deformation bearing plate 5, and the larger the value of the detected electrical signal. The specific functions can be implemented using existing technologies and will not be elaborated here.

[0115] For example, as the pressing force increases, the erased area can gradually increase. As shown in Figure 13, which uses three erased areas as an example to illustrate the gradual change trend of the erased area, as the pressing force increases, the erased area gradually changes from Zone 1 to Zone 2 to Zone 3, and the width of the erased trace gradually widens. Conversely, as the pressing force decreases, the erased area gradually changes from Zone 3 to Zone 2 to Zone 1, and the width of the erased trace gradually narrows.

[0116] For another example, when the pressing force increases, the transparency of the erased trace may gradually increase, and when the pressing force decreases, the transparency of the erased trace may gradually decrease.

[0117] Furthermore, the pressure sensor 61 used to measure the pressing force applied by the stylus tip is not limited to the resistance strain gauge structure shown in the figure. In a specific implementation, the pressure sensor can be used to collect pressure data from the stylus tip 100 and transmit this pressure data to the control unit. The pressure data can include, but is not limited to, pressure values, and the specific pressure value can be selected based on the overall product design requirements.

[0118] Furthermore, the deformation bearing sheet 5 can be made of a steel sheet, which has good bearing strength. Furthermore, the deformation recovery capability of the steel sheet structure also provides good fatigue resistance. In other possible implementations, the deformation bearing sheet 5 can be made of other materials depending on the overall product requirements, which will not be discussed here.

[0119] In a specific implementation, the deformation bearing sheet 5 can be fixed to the pen end bracket 8 at both ends so as to deform based on the pressing force acting on the force-bearing surface 51 of the deformation bearing sheet 5. Of course, in other specific implementations, the deformation bearing sheet 5 can also be fixed to the pen end bracket 8 at one end, or can also deform when the pen end is subjected to force, which is not limited in this embodiment of the present application.

[0120] As shown in the figure, detection surface 52 is the other surface of the deformation bearing plate 5 opposite the force-bearing surface 51. This fully utilizes the space along the length of the pen shaft to arrange the pressure sensor 61, achieving a high level of integration. In other possible implementations, detection surface 52 and force-bearing surface 51 can also be located on the same side of the deformation bearing plate 5 (not shown in the figure).

[0121] To further improve module assembly processability, a positioning pair can optionally be configured between the electrode assembly 2 and the support member 4. As shown in Figures 8 and 9 , the force-transmitting protrusion 233 on the electrode assembly 2 side has a positioning block 2331 extending laterally. Accordingly, the sidewalls of the force-transmitting recess 41 expand laterally to form a positioning groove 411. During assembly, the positioning block 2331 on the electrode assembly 2 side can be partially placed in the positioning groove 411 of the support member 4, forming a positioning pair to meet assembly requirements. This arrangement can prevent errors in the assembly of the electrical connection between the two electrodes and has a fool-proof effect.

[0122] The second end 63 of the sensor FPC 6 is connected to the control unit 91 in the pen holder 20, as shown in Figure 12, to establish corresponding signal and power transmission. In a specific implementation, as shown in Figure 11, the portion of the sensor FPC 6 from the pressure sensor 61 to the second end 63 can extend from the central cavity of the pen holder 8 to the side of the control unit 91.

[0123] In other possible implementation schemes, the first electrode 21, the second electrode 22 and the pressure sensor 61 and the control unit 91 can also be electrically connected through wires (not shown in the figure), rather than being limited to the form of a sensor FPC with integrated wire function.

[0124] Here, the pen tail bracket 8 can be fixed to other fixing components within the pen body 20 to achieve assembly of the pen tail module. For example, but not limited to, the inner end of the pen tail bracket 8 can be inserted or snap-fitted to the refill 9 within the pen body 20. In other specific implementations, the pen tail bracket 8 can also be fixed to the inner wall of the pen body 20 via its outer peripheral surface, such as, but not limited to, adhesive bonding. This embodiment of the present application is not limited thereto.

[0125] In order to avoid damage to the internal structure of the module due to excessive force, the pen tail module provided in this embodiment may optionally further include a limit baffle. As shown in Figures 9 and 12, compared with the deformation bearing sheet 5, the limit baffle 7 is arranged closer to the support member 4. The limit baffle 7 shown in the figure is fixed to the end of the pen tail bracket 8. For example, but not limited to, the two ends of the limit baffle 7 can be glued and fixed to the pen tail bracket 8; the deformation bearing sheet 5 is fixed in the inner cavity of the pen tail bracket 8. For example, but not limited to, the two ends of the deformation bearing sheet 5 can also be glued and fixed to the pen tail bracket 8. At the same time, the support member 4 includes a limit surface 43, which is located on the side of the support member 4 opposite to the limit baffle 7. In the pressing direction of the pen cap assembly, there is a distance L between the limit surface 43 of the support member 4 and the limit baffle 7.

[0126] It should be understood that the limiting surface 43 can be flat as shown in the figure, or it can be non-flat, as long as it can form a constrained limit relationship with the limiting baffle in the pressing direction of the pen cap assembly to limit the pressing stroke of the pen cap assembly. Please refer to Figures 14A and 14B. Figure 14A shows a schematic diagram of the positional relationship between the limiting baffle, support member, and deformation bearing plate in the initial state, and Figure 14B shows a schematic diagram of the positional relationship between the support member pressing against the limiting baffle.

[0127] As the pressing force F of the pen tip gradually increases, the distance L decreases until the limiting surface 43 of the support member 4 presses against the limiting baffle 7. As shown in Figure 14B, after the limiting surface 43 presses against the limiting baffle 7, the generated reaction force Fr can offset part of the pressing force F, ensuring that the deformable bearing plate 5 is not crushed. The maximum displacement of the deformable bearing plate 5 is L, which is roughly equal to the distance between the limiting surface 43 and the limiting baffle 7, thus protecting the working state of the pressure sensor 61.

[0128] Alternatively, within the tolerance range of the pressure sensor 61, the thickness d of the limit baffle 7 can be adjusted to properly control the pressing stroke of the cap assembly and thereby constrain the pressing force on the pen tail button. In other words, the impact of excessive operating force can be properly controlled based on the blocking and limiting effect of the limit baffle 7.

[0129] As shown in FIG9 , in a specific implementation, a clearance opening 71 is provided on the stopper plate 7 so that the pressing portion 42 of the support member 4 can abut against the deformable bearing sheet 5 through the clearance opening 71. As shown in FIG12 , a mounting step surface 81 can be provided on the inner wall of the pen end bracket 8 , and the deformable bearing sheet 5 is fixedly mounted on the mounting step surface 81. Of course, in other possible implementations, the deformable bearing sheet 5 can be fixed to the pen end bracket 8 using other structural forms, as long as reliable fixation can be achieved.

[0130] It should be noted that the limit baffle, as a limit part for limiting the pressing stroke of the pen cap assembly, can be arranged at different positions and can also play the role of preventing and limiting.

[0131] In one possible implementation, as shown in Figures 15A and 15B, the limit baffle 7 can be arranged to be opposite to the pen cap 1 equipped with the electrode assembly 2. Figure 15A shows a simplified diagram of the positional relationship of another limit baffle in the initial state. In the pressing direction of the pen cap assembly, there is a distance L between the limit baffle 7 and the limiting surface of the pen cap assembly. Here, the limit baffle can be fixed to the pen tail bracket 8 or to the inner wall surface of the pen barrel (not shown in the figure); Figure 15B shows a simplified diagram of the positional relationship of the pen cap 1 equipped with the electrode assembly pressing against the limit baffle 7. After the inner limiting surface of the pen cap 1 presses against the limit baffle 7, the reaction force Fr generated can also offset part of the pressing force F. The maximum displacement of the deformation bearing sheet 5 is L, which can ensure that the deformation bearing sheet 5 is not crushed.

[0132] In other possible implementations, as shown in Figures 16A and 16B, the limit baffle 7 can also be arranged to be opposite to the deformation bearing sheet 5. Figure 16A shows another schematic diagram of the positional relationship of the limit baffle in the initial state. The limit baffle 7 is located on the side of the deformation bearing sheet 5 that is away from the support member 4. In the pressing direction of the pen cap assembly, there is a distance L between the limit baffle 7 and the deformation bearing sheet 5. Here, the limit baffle can be fixed to the pen tail bracket 8 (not shown in the figure); Figure 16B shows a schematic diagram of the positional relationship of the deformation bearing sheet 5 pressing against the limit baffle 7. After the deformation bearing sheet 5 is deformed under pressure and presses against the limit baffle 7, the reaction force Fr generated can also offset part of the pressing force F. The maximum displacement of the deformation bearing sheet 5 is L, which can ensure that the deformation bearing sheet 5 is not crushed.

[0133] In the aforementioned embodiment, two electrodes are assembled and fixed to the electrode bracket 23 to form the electrode assembly 2, and the electrode assembly 2 is assembled and fixed to the pen cap 1 to form the pen cap assembly. In other specific implementations, the two electrodes and the pen cap can also be integrally formed using an injection molding process.

[0134] Please refer to Figure 17, which is a schematic diagram of the assembly relationship of another pen tail module provided in an embodiment of the present application. In order to clearly illustrate the differences and connections between this embodiment and the embodiment described in Figure 3, components or structures with the same functions are indicated with the same symbols in the figure.

[0135] As shown in Figure 17 , the pen tail module 10a is located at the end of the pen barrel 20. In this embodiment, the first electrode 21, the second electrode 22, and the pen cap 1a are integrally injection-molded to form the pen cap assembly, and the force-transmitting protrusion 13a is also injection-molded. In other words, compared to the pen tail module described in Figure 3 , the pen cap and electrode bracket in this embodiment are formed using injection molding.

[0136] In this embodiment, the force-transmitting protrusion 11a is disposed opposite the force-transmitting recess 41 of the support member 4 and can be partially inserted into and abut against the force-transmitting recess 41 of the support member 4 to transmit the pressing force through the support member 4. The first electrical connection portion 211 of the first electrode 21 and the second electrical connection portion 221 of the second electrode 22 both extend outward and are exposed from the injection molding material, respectively abutting and electrically connecting with the first conductive foam 31 and the second conductive foam 32, and respectively communicating with the corresponding electrical connection ports on the first end 62 through the first conductive foam 31 and the second conductive foam 32.

[0137] In addition, the support member 4a and the deformable bearing sheet 5a of this embodiment are integrally formed, that is, the support member 4a and the deformable bearing sheet 5a are formed as a single part. For ease of description, the support member 4a and the deformable bearing sheet 5a are respectively labeled in the figure. In a specific implementation, the support member 4a and the deformable bearing sheet 5a can be made of steel, and the ends of the deformable bearing sheet 5a can be welded to the pen end bracket 8, which can effectively enhance the overall structural strength of the pen end.

[0138] Similarly, the pressure sensor 61 of the sensor FPC 6 is secured to the detection surface 52a of the deformation bearing sheet 5a. This allows the force applied to the pen tip to be transmitted sequentially through the pen cap 1a and the electrode assembly 2 to the integrally formed support member 4a and the deformation bearing sheet 5a. The pressure sensor 61, covering its detection surface 52a, detects the user's operating pressure and implements the corresponding function according to the corresponding operating instructions. Furthermore, a distance L is provided between the limiting surface 43a of the support member 4a and the limiting stopper 7 to establish a limit constraint for the pressing stroke.

[0139] Other configurations and connection relationships can be implemented in the same manner as the implementation described in FIG3 , and will not be described in detail here.

[0140] In the embodiments described in Figures 3 and 17 above, the limiter for limiting the pressing stroke is a limit plate structure and is constructed based on the support member. In other implementations, the limiter for the pressing stroke can also be constructed based on a deformable bearing sheet.

[0141] Please refer to Figures 18 and 19 , where Figure 18 is a schematic diagram of the overall structure of another pen tail module provided in an embodiment of the present application, and Figure 19 is a schematic diagram of the assembly relationship of the pen tail module shown in Figure 18 . To clearly illustrate the differences and connections between this embodiment and the embodiments described in Figures 3 and 17 , components or structures with the same functions are indicated in the figures with the same reference numerals.

[0142] As shown in Figure 18, the pen end module 10b's cap assembly is integrally injection-molded with the pen cap 1b, first electrode 21b, and second electrode 22b. Force applied to the pen end is transmitted sequentially through the cap assembly and support member 4b to the deformation bearing sheet 5b, which is secured to the pen end bracket 8b.

[0143] As shown in Figure 19, the first electrical connection portion 211 of the first electrode 21b and the second electrical connection portion 221 of the second electrode 22b both extend out and are exposed from the injection molding material, and are electrically connected to the first conductive foam 31 and the second conductive foam 32 respectively, and are connected to the corresponding electrical connection ports on the first end 62 through the first conductive foam 31 and the second conductive foam 32.

[0144] Please also refer to Figure 20, which is a BB cross-sectional view of the pen tail module shown in Figure 18. As shown in Figure 20, the pen tail module 10b located at the end of the pen body 20 has a glue groove 121b on the outer circumferential surface of the connecting portion 12b of the pen cap 1b. When the pen cap 1b is bonded to the inner wall of the pen body 20, the glue layer formed by the glue-receiving space formed by the glue groove 121b ensures a stable connection between the pen cap 1b and the pen body 20.

[0145] Among them, the pressing part 42b of the support member 4b is in contact with the force-bearing surface 51b of the deformation bearing sheet 5b, and the pressure sensor 61 configured on the sensor FPC 6 is fixed to the detection surface 52b of the deformation bearing sheet 5b, converting the deformation of the deformation bearing sheet 5a into an electrical signal.

[0146] In this embodiment, a limiter 82b is provided in the middle of the pen holder 8b. A distance L is defined between the pressure sensor 61, which covers the detection surface 52b of the deformation bearing sheet 5b, and the limiter 82b of the pen holder 8b. In other words, the FPC on which the pressure sensor 61 is mounted is spaced relative to the limiter 82b. This allows the deformation bearing sheet 5b to deform under pressure and press against the limiter 82b. The resulting reaction force can also partially offset the compressive force (see FIG. 16B ), preventing the deformation bearing sheet 5b from being crushed.

[0147] Of course, in other possible specific implementations, the limiting portion 82b of the pen tail bracket 8b can also be set relative to the detection surface 52b of the deformation bearing piece 5b (not shown in the figure), and the detection surface 52b is pressed against the pressure limiting portion 82b to achieve the constraint limit of the pressing stroke.

[0148] In order to improve the reliability of the fixed connection between the deformable carrier sheet 5a and the pen end bracket 8b, the end of the deformable carrier sheet 5b optionally includes a mounting portion 53b bent toward the pen end bracket 8b. As shown in Figure 18, a corresponding notch 83b is provided on the pen end bracket 8b, and the mounting portion 53b at the end of the deformable carrier sheet 5b is inserted and fixed in the notch 83b. In this way, the inserted and adapted mounting portion 53b and the notch 83b can provide assembly positioning, and then be welded or glued. On the one hand, it has better assembly processability and can improve the assembly accuracy of the product; on the other hand, it increases the fixed contact area between the two, and the fixed relationship is effectively strengthened.

[0149] Please refer to Figures 20, 21 and 22, wherein Figure 21 is a schematic diagram of the assembly relationship between the deformation bearing sheet and the pen tail bracket shown in Figure 18, and Figure 22 is a schematic diagram of the assembly relationship between the support member and the sensor FPC shown in Figure 18.

[0150] In a specific implementation, as shown in FIG21 , mounting portions 53b may be provided at both ends of the deformation bearing piece 5b, which are respectively inserted and fixed in corresponding slots 83b on the pen tail bracket 8b, so that the assembly relationship is more stable.

[0151] The pressing force applied to the end of the pen acts on the force-bearing surface 51b of the deformation bearing sheet 5b through the pressing portion 42b of the support member 4b. In order to further improve the reliability of the support member 4b, the pressing portion 42b of the support member 4b is optionally provided with a metal adapter 44b, which includes a pressing surface 441b. The pressing surface 441b is arranged relative to the force-bearing surface 51b of the deformation bearing sheet 5b, and the deformation is caused by the pressing surface 441b of the metal adapter 44b acting on the deformation bearing sheet 5b. In this way, based on the setting of the metal adapter 44b, the bearing capacity of the support member 4b can be improved. For the pen end module with integrated button function and eraser function, stable reliability of use can be maintained in scenarios with high operating frequency.

[0152] The metal adapter 44b and the main body of the support member 4b may be integrally formed by an injection molding process. For example, but not limited to, the main body of the support member 4b may be injection molded by using PC (Polycarbonate) material.

[0153] Please also refer to Figures 20, 22, and 23. Figure 23 illustrates the bent assembly of the sensor FPC shown in Figure 18. As shown, the first end 62 of the sensor FPC 6 is bent to the side opposite the electrical connection portions of the two electrodes. The first electrical connection portion 211 communicates with the corresponding electrical connection port on the first end 62 via the first conductive foam 31, and the second electrical connection portion 221 communicates with the corresponding electrical connection port on the first end 62 via the second conductive foam 32. The portion of the sensor FPC 6 from the pressure sensor 61 to the second end 63 can extend from the outside of the pen holder 8 to the control unit 91.

[0154] Please refer to Figure 24, which is a schematic diagram of the assembly relationship of the pen cap assembly shown in Figure 18. In this embodiment, the force transmission protrusion 212b of the pen cap assembly is arranged on the first electrode 21b. Here, the force transmission protrusion 212b for abutting against the force transmission recess 41b on the support member 4b is integrally formed with the first electrode 21b. The elastic modulus of the first electrode 21b is relatively low, so the transmission efficiency of the pressing force is relatively high. On this basis, the positioning block 2121b for playing a fool-proof role is extended to the side from the force transmission protrusion 212b. Similarly, the positioning block 2121b is integrally formed with the first electrode 21b. During assembly, the positioning block 2331b on the pen cap assembly side can be partially placed in the positioning groove 411b of the support member 4b to form a fool-proof positioning pair.

[0155] The first and second electrodes configured in the pen cap assembly can adopt different structural forms. Please refer to Figure 25 for four different structural implementations of the first and second electrodes. The structure indicated by the vertical hatching in the figure is the main body of the first electrode, and the structure indicated by the grid hatching in the figure is the main body of the second electrode.

[0156] Please refer to Figure 25A, which is a projection view of a first electrode and a second electrode provided in an embodiment of the present application, and the projection direction is the length direction of the stylus. In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the first electrode 21A is circular, and the projection of the body of the second electrode 22A is annular, and is sleeved on the outside of the body of the first electrode 21A. It should be understood that the length direction of the pen tail module here is consistent with the length direction of the stylus. Among them, the body of the first electrode 21A is located on the inside, and a relatively large electrode area can be set to ensure that a larger signal amount is obtained after contact with the contact object; the body of the annular second electrode 22A is sleeved on the outside of the body of the first electrode 21A, which can meet the coding signal communication without dead angles within a full range of 360°, thereby improving the accuracy of identifying and determining the current erasing position.

[0157] It can be understood that the main body configuration of the two electrodes shown in Figure 25A is consistent with the implementation scheme described in Figures 3, 17 and 18 above.

[0158] Please refer to Figure 25B, which shows a projection of another first electrode and second electrode according to an embodiment of the present application. In a plane perpendicular to the length of the pen tail module, the projection of the body of the second electrode 22B is circular, while the projection of the body of the first electrode 21B is annular and is positioned outside the body of the second electrode 22B.

[0159] Please refer to Figure 25C, which shows a projection of another first and second electrode according to an embodiment of the present application. In a plane perpendicular to the length of the end module, the projection of the body of second electrode 22C forms a cross, while the projection of the body of first electrode 21C forms a circular ring, which is positioned outside the body of second electrode 22C.

[0160] Please refer to Figure 25D, which is a projection view of another first electrode and second electrode provided in an embodiment of the present application. In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode 22D is a "cross" shape, and the projection of the body of the first electrode 21D is four arc segments arranged at intervals in the circumferential direction. The four protruding ends of the "cross"-shaped second electrode 22D are respectively located between two adjacent arc segments of the body of the first electrode 21D. Of course, in other possible implementation schemes, the projection of the body of the second electrode 22D can also be another number of protruding ends arranged radially from the center outward, and accordingly, the projection of the body of the first electrode 21D is another number of arc segments arranged at intervals in the circumferential direction, and each protruding end is respectively located between two adjacent arc segments of the body of the first electrode 21D.

[0161] Among the above four electrode setting structures, in the implementation schemes described in Figures 25B and 25C, the second electrode 22B for transmitting the coding signal is located on the inner side of the circular body of the first electrode 21C, and the coding signal is relatively small; in the implementation scheme described in Figure 25D, the second electrode 22B for transmitting the coding signal has four protruding ends respectively located between two adjacent arc segments of the body of the first electrode 21D, which can enhance the coding signal; in the implementation scheme described in Figure 25A, the annular second electrode 22A body is sleeved on the outside of the first electrode 21A body, which can form a strong coding signal within the entire circumference, which is the optimal design.

[0162] Furthermore, the two electrodes may be made of metal. In other implementations, the surfaces of the first and second electrodes opposite the pen cap may be coated with a metal film, for example, but not limited to, by metallization. This is accomplished as long as the areas and relative positions of the first and second electrodes shown in the projection diagram are met.

[0163] Based on the aforementioned pen tail module, the present application also provides a stylus control method, which can be applied to the scenario shown in Figure 1. Please refer to Figure 26, which is a flowchart of a stylus control method provided by the present application. As shown in Figure 26, the stylus control method includes:

[0164] Step S2601: When the end of the stylus pen approaches or contacts a contact object, an identification signal generated by coupling between the first electrode and the contact object is obtained.

[0165] Based on the contact objects made of different materials, the first electrode can be coupled to generate different identification signals. Taking the user's finger as an example, when the finger approaches or contacts the first electrode 21 of the pen tail module 10, the operating finger is equivalent to the other plate of the capacitor, and the two are coupled to form a first capacitor and generate a first capacitance value. Taking the touch screen of an electronic device as an example, when the tail end of the pen tail module 10 approaches or contacts the touch screen 201, the two are coupled to form a second capacitor and generate a second capacitance value. Based on the first capacitance value and the second capacitance value, a corresponding identification signal is obtained.

[0166] Step S2602: When the identification signal is the first identification signal, execute the first function; when the identification signal is the second identification signal, execute the second function.

[0167] For example, if the first function is a key function and the second function is an eraser function, when the first contact object is a finger of the user, the recognition signal may be a first recognition signal for executing the key function, and executing the first function may include step 2603; when the second contact object is a touch screen on the electronic device, the recognition signal may be a second recognition signal for executing the eraser function, and executing the second function may include step 2604.

[0168] Step 2603: When the identification signal is the first identification signal, pressure data collected by the pressure sensor is obtained, which may be first pressure data, and a first control signal for executing the first function is output based on the first pressure data. In a specific implementation, key detection and judgment are performed by obtaining the pressure data collected by the pressure sensor. When the pressure data indicates that the current operation is a key operation, a first control signal for executing the key function is output, that is, a key event is output. The first control signal is used by the electronic device to execute the key function (first function). When the pressure data does not reach the key operation threshold, the key event is released.

[0169] Step 2604: when identification signal was the first identification signal, by the second electrode output coding signal, and obtain the pressure data of pressure sensor collection, these pressure data can be the second pressure data, and according to these second pressure data output, perform the second control signal of second function, also promptly output eraser event, this second control signal is used for electronic equipment to perform second function (eraser function).When pressure data did not reach the eraser operation threshold value, then release this eraser event.

[0170] Optionally, to avoid erroneous operation, step S2600 may be performed before obtaining the identification signal generated by the coupling between the first electrode and the contact object.

[0171] Step S2600: Execute step S2601 conditional on the pressure sensor collecting pressure data. In a specific implementation, before acquiring the identification signal generated by the coupling of the first electrode and the contact object, the pressure sensor may collect third pressure data. If this third pressure data meets a preset condition, the step of acquiring the identification signal generated by the coupling of the first electrode and the contact object is executed. In other words, the pen end module function is activated conditionally when the pen end applies pressure and generates a corresponding identification signal in conjunction with the contact object. This prevents false triggering of the first or second function.

[0172] Alternatively, in order to reduce the power consumption of the product, a second control signal for executing the second function is output when the pressure data is greater than the trigger threshold of the second function; taking the eraser function as an example, when the tail of the pen touches or approaches the touch screen, the eraser function can only be awakened by erasing forcefully, and it is in the off state in other scenarios, thereby reducing the power consumption of the product.

[0173] In addition to the aforementioned tail module, this embodiment also provides a stylus pen including this tail module. As shown in FIG2 , the tail module 10 is located at the end of the pen shaft 20 of the stylus pen 100. It should be understood that the tip module 30 and other functional components of the stylus pen 100 can be implemented by those skilled in the art using existing technologies, and therefore will not be further described herein.

[0174] The stylus provided in this embodiment has both button functions and eraser functions, which can effectively improve the user experience and meet the needs of various application scenarios. It should be noted that, in addition to the tablet computer described in the aforementioned embodiment, the electronic device 200 in the embodiment of the present application can also be a smart phone, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, and other mobile terminals or fixed terminals with a touch screen. The form of the terminal device in the embodiment of the present application is not specifically limited.

[0175] It should be understood that other functions of the electronic device are not the core invention of this application, and those skilled in the art can implement them according to existing technologies, so they will not be described in detail herein.

[0176] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pen tail module, used to adapt to the pen holder of a stylus pen, characterized in that: The pen tail module comprises an elastic pen cap, a first electrode and a second electrode; The pen cap is used to be fixedly connected to the pen body, the first electrode and the second electrode are arranged on the pen cap at intervals, and the first electrode, the second electrode and the pen cap form a pen cap assembly; The first electrode is used to couple with the contact object to generate an identification signal, when the contact object is a first contact object, the identification signal is a first identification signal for performing a first function, and when the contact object is a second contact object, the identification signal is a second identification signal for performing a second function; wherein the first contact object and the second contact object are made of different materials, and the first identification signal is different from the second identification signal; The second electrode is used to transmit a coding signal.

2. The pen tail module according to claim 1, characterized in that: The pen tail module also includes a pressure sensor and a pen tail bracket. The pressure sensor is fixed on the pen tail bracket and is used to detect the pressure applied to the pen tail module.

3. The pen tail module according to claim 2, characterized in that: The pen tail module also includes a sensor FPC, the pressure sensor is integrated on the sensor FPC, and the sensor FPC includes a first end and a second end; the first electrical connection part of the first electrode and the second electrical connection part of the second electrode are respectively electrically connected to the electrical connection port of the first end of the sensor FPC; the electrical connection port of the first end and the pressure sensor are respectively connected to the second end through the wires in the sensor FPC substrate, and the electrical connection port of the second end of the sensor FPC is used to be electrically connected to the control unit of the stylus.

4. The pen tail module according to claim 3, characterized in that: The electrical connection port of the first end is the surface bright copper on the sensor FPC.

5. The pen tail module according to claim 3 or 4, characterized in that: The pen tail module also includes a support member and a deformation bearing sheet, the deformation bearing sheet is fixed on the pen tail bracket, and the pressure sensor is located on the deformation bearing sheet; the support member is located between the pen cap assembly and the deformation bearing sheet, and the support member is respectively abutted against the pen cap assembly and the deformation bearing sheet.

6. The pen tail module according to claim 5, characterized in that: The pen cap assembly and the support member are provided with a force transmission convex portion on one and a force transmission concave portion on the other. The force transmission convex portion can be partially inserted into the force transmission concave portion and abut against the force transmission concave portion.

7. The pen tail module according to claim 6, characterized in that: The force transmission protrusion is arranged on the pen cap assembly, and the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode are respectively located on two sides of the force transmission protrusion.

8. The pen tail module according to any one of claims 5 to 7, characterized in that: The two ends of the deformation bearing sheet include mounting portions bent toward the pen tail bracket. The pen tail bracket is provided with a notch, and the mounting portions are inserted and fixed in the notch.

9. The pen tail module according to any one of claims 5 to 8, characterized in that: The support member includes a pressing portion abutting against the deformation bearing sheet, the pressing portion is provided with a metal transition member, and the metal transition member includes a pressing surface arranged opposite to the force-bearing surface of the deformation bearing sheet.

10. The pen tail module according to claim 9, characterized in that: The metal adapter and the main body of the support member are formed by injection molding.

11. The pen tail module according to any one of claims 5 to 7, characterized in that: The support member and the deformation bearing sheet are integrally formed.

12. The pen tail module according to any one of claims 5 to 11, characterized in that: The first end of the sensor FPC is bent to the side of the support member opposite to the first electrode and the second electrode; the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode are electrically connected to the corresponding surface bright copper on the first end of the sensor FPC through conductive foam.

13. The pen tail module according to any one of claims 5 to 12, characterized in that: It also includes a limiting portion, which can limit the pressing stroke of the pen cap assembly.

14. The pen tail module according to claim 13, characterized in that: The limiting portion is a fixed limiting baffle, and the supporting member includes a limiting surface. In the pressing direction of the pen cap assembly, there is a distance between the limiting surface of the supporting member and the limiting baffle.

15. The pen tail module according to claim 13, characterized in that: The limiting portion is a fixed limiting baffle, and the pen cap assembly includes a limiting surface. In the pressing direction of the pen cap assembly, there is a distance between the limiting surface of the pen cap assembly and the limiting baffle.

16. The pen tail module according to claim 13, characterized in that: The limiting portion is arranged in the middle of the pen tail bracket, and in the pressing direction of the pen cap assembly, there is a distance between the limiting portion and the deformation bearing sheet, or there is a distance between the limiting portion and the pressure sensor.

17. The pen tail module according to any one of claims 1 to 16, characterized in that: The pen cap assembly further comprises an electrode bracket, the first electrode and the second electrode are mounted on the electrode bracket, and the force transmission protrusion of the pen cap assembly is formed on the electrode bracket.

18. The pen tail module according to claim 17, characterized in that: The body of the first electrode and the body of the second electrode are located at opposite sides of the electrode bracket and the pen cap, and the first electrical connection portion of the first electrode and the second electrical connection portion of the second electrode both extend out of the electrode bracket.

19. The pen tail module according to claim 17 or 18, characterized in that: The first electrode, the second electrode and the electrode bracket are formed by injection molding.

20. The pen tail module according to any one of claims 1 to 16, characterized in that: The first electrode, the second electrode and the pen cap of the pen cap assembly are formed by injection molding.

21. The pen tail module according to claim 20, characterized in that: The force transmission protrusion of the pen cap assembly is formed on the first electrode, or on the second electrode.

22. The pen tail module according to any one of claims 17 to 21, characterized in that: In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the first electrode is circular, and the projection of the body of the second electrode is annular and is sleeved on the outside of the body of the first electrode.

23. The pen tail module according to any one of claims 17 to 21, characterized in that: In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode is circular, and the projection of the body of the first electrode is annular and is sleeved on the outside of the body of the second electrode.

24. The pen tail module according to any one of claims 17 to 21, characterized in that: In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode is in a "cross" shape, and the projection of the body of the first electrode is in a circular ring shape and is sleeved on the outside of the body of the second electrode.

25. The pen tail module according to any one of claims 17 to 21, characterized in that: In a plane perpendicular to the length direction of the pen tail module, the projection of the body of the second electrode is a "cross" shape, the projection of the body of the first electrode is four arc segments arranged at circumferential intervals, and the four extending ends of the second electrode are respectively located between two adjacent arc segments of the body of the first electrode.

26. The pen tail module according to any one of claims 1 to 25, characterized in that: The pen cap comprises a pressing portion and a connecting portion, wherein the pressing portion is located at the middle portion of the pen cap, the connecting portion is located at the peripheral edge of the pen cap, and the outer peripheral surface of the connecting portion is provided with a glue groove.

27. A touch pen, characterized in that: It comprises a pen holder and a pen tail module as described in any one of claims 1 to 26, wherein the pen tail module is fixedly arranged at the tail of the pen holder, and a pen cap of the pen tail module is fixedly connected to the pen holder.

28. The stylus pen according to claim 27, characterized in that: The pen holder is a hollow structure, and the pen cap is glued and fixed to the inner wall of the pen holder.

29. A touch control system, comprising an electronic device with a touch screen and a touch pen compatible with the electronic device, characterized in that: The stylus pen is the stylus pen according to claim 27 or 28.

30. A method for controlling a touch pen, characterized in that: The stylus pen comprises a pen tail module according to any one of claims 1 to 26, and the control method of the stylus pen comprises the following steps: Acquiring an identification signal generated by coupling the first electrode with the contact object; When the identification signal is a first identification signal, a first function is executed; when the identification signal is a second identification signal, a second function is executed.

31. The method for controlling a touch pen according to claim 30, characterized in that: The executing the first function includes: acquiring first pressure data collected by a pressure sensor, and outputting a first control signal for executing the first function according to the first pressure data.

32. The method for controlling a touch pen according to claim 31, characterized in that: The executing the second function includes: outputting a coding signal through the second electrode, acquiring second pressure data collected by the pressure sensor, and outputting a second control signal for executing the second function according to the second pressure data.

33. The control method of the touch pen according to claim 31 or 32, characterized in that: Before acquiring the identification signal generated by the coupling between the first electrode and the contact object, the pressure sensor collects third pressure data; If the third pressure data meets the preset condition, the step of acquiring an identification signal generated by the coupling between the first electrode and the contact object is performed.

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