Passive capacitive touch pen and wiping pen cap

Abstract

The invention relates to a passive capacitive touch pen and a wiping pen cap, which comprise a pen body made of a non-conductive material and internally provided with a space, and a first opening and a second opening which are respectively arranged at two ends of the pen body, the largest first line segment, perpendicular to the center axis of the pen body, in the first opening is smaller than the largest space line segment, perpendicular to the center axis, in the space, and the largest second line segment, perpendicular to the center axis, in the second opening is smaller than the space line segment; the electric conductor is located in the space, and the electric conductor comprises conductive foam; the first pen point is made of a conductive material, is positioned in the first opening and protrudes out of the pen body in the first direction of the central shaft, and the first pen point is in contact with the conductive body; and the second pen point is made of a conductive material, is positioned in the second opening and protrudes out of the pen body in the second direction of the central shaft, and the second pen point is in contact with the conductive body.

Description

Technical Field The invention relates to a capacitive touch pen, in particular to a passive capacitive touch pen which does not actively emit electromagnetic waves. Background Art Capacitive touch screens or panels are one of the main input devices for modern consumer electronics. In addition to using fingers for input, you can also use a passive capacitive stylus that does not actively emit electromagnetic waves for input. Since there is no battery and active components, passive capacitive stylus is cheap. However, a passive capacitive stylus only has a pen tip as a writing tool. If you want to erase on a touch screen or panel, you need to use another electronic eraser. Or you need to switch the input mode to the erase mode on the application before you can use the pen tip to perform the erase function. In addition, if you switch to the erase mode, the range touched by the stylus tip is very small, and the user needs to increase the erase range to quickly erase the desired part. Whether using an electronic eraser or switching modes, it is inconvenient for users. Summary of the invention The purpose of the present invention is to overcome the existing technical defects and provide a new passive capacitive touch pen and eraser cover, which can enhance the user experience and facilitate the user to input or erase without additional switching steps. It can also improve the accuracy of input and expand the erasing range. It can also reduce the production cost, be lightweight, and be more resistant to falling, so that it is more suitable for practical use. The purpose of the present invention is achieved by the following technical solutions. According to one embodiment of the present application, a passive capacitive touch pen is provided, comprising: a pen body, which is made of non-conductive material and contains a space inside, and the two ends of the pen body respectively have a first opening and a second opening, the largest first line segment perpendicular to the central axis of the pen body in the first opening is smaller than the largest spatial line segment perpendicular to the central axis in the space, and the largest second line segment perpendicular to the central axis in the second opening is smaller than the spatial line segment; a conductor, which is located in the space, wherein the conductor comprises conductive foam; a first pen tip, which is made of conductive material, is located in the first opening, and protrudes out of the pen body in a first direction of the central axis, and the first pen tip contacts the conductor; and a second pen tip, which is made of conductive material, is located in the second opening, and protrudes out of the pen body in a second direction of the central axis, and the second pen tip contacts the conductor. In order to make it easier for the touch processing device to identify which end of the stylus pen contacts the touch screen or panel, the capacitive stylus pen further includes an wiping pen cover for covering and connecting the second pen tip protruding from the pen body, the wiping pen cover includes a conductive material, and the wiping pen cover is electrically coupled to the second pen tip. In order to make the erasable pen cover more firmly combined with the pen body, the erasable pen cover further includes: a third pen tip, which is made of conductive material and is used to cover and connect the second pen tip protruding from the pen body; and one or more third pen tip fasteners, which are used to fix the third pen tip to the pen body. In order to allow the user to use a larger contact area for wiping, the largest wiping pen cover line segment perpendicular to the central axis in the wiping pen cover should be larger than the largest pen body line segment perpendicular to the central axis. In order to reduce the weight of the stylus pen as much as possible, especially to reduce the volume of the conductor, the conductor further includes a shaping sleeve, which is used to wrap the conductive foam so that the portion of the conductor in the space does not contact the pen body. In order to stably fix the conductor inside the pen body and stably connect the first pen tip and the second pen tip, the conductor occupies part of the first opening and part of the second opening, the conductive foam wraps a part of the first pen tip, and the conductive foam wraps a part of the second pen tip. In order to reduce the number of parts and the manufacturing process, and to improve the degree of electrical coupling, the capacitive stylus pen further includes one of the following conditions: the conductor, the first pen tip and the second pen tip are integrally formed; the conductor and the first pen tip are integrally formed; and the conductor and the second pen tip are integrally formed. In order to fix a relatively small first pen tip inside the first opening, wherein the first line segment is smaller than the second line segment, the first opening further includes one or more fasteners for fixing the first pen tip inside the first opening. In order to enhance the different touches of the user at the two ends of the stylus when using the stylus, the hardness of the material of the first pen tip is greater than the hardness of the material of the second pen tip, the elasticity of the material of the second pen tip is greater than the elasticity of the material of the first pen tip, and the hardness of the conductive foam is less than the material of the first pen tip and the material of the second pen tip. According to one embodiment of the present application, a pen wiper as described above is provided. According to one embodiment of the present application, there is provided an wiping pen cap, which is suitable for a passive capacitive touch pen, wherein the capacitive touch pen comprises a pen body, a first pen tip, a second pen tip and a conductor, the pen body is made of a non-conductive material and contains a space inside, the two ends of the pen body respectively have a first opening and a second opening, the first pen tip is made of a conductive material, is located within the first opening, and protrudes out of the pen body in a first direction of the central axis of the pen body, the first pen tip contacts the conductor, the second pen tip is made of a conductive material, is located within the second opening, and protrudes out of the pen body in a second direction of the central axis, the second pen tip contacts the conductor, and is characterized in that the wiping pen cap is used to cover and connect the second pen tip protruding out of the pen body, the wiping pen cap comprises a conductive material, and the wiping pen cap is electrically coupled to the second pen tip. In order to make the erasable pen cover more firmly combined with the pen body, the erasable pen cover further includes: a third pen tip, which is made of conductive material and is used to cover and connect the second pen tip protruding from the pen body; and one or more third pen tip fasteners, which are used to fix the third pen tip to the pen body. In order to allow the user to use a larger contact area for wiping, the largest wiping pen cover line segment perpendicular to the central axis in the wiping pen cover should be larger than the largest pen body line segment perpendicular to the central axis. Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the passive capacitive touch pen of the present invention can enhance the user experience and facilitate the user to input or wipe without additional switching steps. For example, the accuracy of input is improved and the wiping range is expanded. In addition, the manufacturing cost can be reduced, the weight is light, and the touch pen is more resistant to falling. The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 FIG. 1 is a block diagram of a touch control system 100 according to an embodiment of the present invention. Figure 2 Schematic diagram of a cross-section of a pen body 200 according to an embodiment of the present application. Figure 3 FIG. 2 is a schematic diagram of a pen body 200 according to an embodiment of the present application. Figure 4 FIG. 4 is a cross-sectional schematic diagram of a stylus pen 400 according to an embodiment of the present application. Figure 5 FIG. 5 is a cross-sectional schematic diagram of a stylus pen 500 according to an embodiment of the present application. Figure 6 FIG. 4 is a cross-sectional schematic diagram of a stylus pen 600 according to an embodiment of the present application. Figure 7 FIG. 5 is a cross-sectional schematic diagram of a stylus pen 700 according to an embodiment of the present application. Figure 8 FIG. 8 is a cross-sectional schematic diagram of a stylus pen 800 according to an embodiment of the present application. Fig. 9 FIG. 4 is a cross-sectional schematic diagram of a stylus pen 900 according to an embodiment of the present application. Fig.10 Schematic diagram of a wiper pen cover 940 according to an embodiment of the present application. Fig.11 FIG. 1 is a cross-sectional schematic diagram of a stylus pen 1100 according to an embodiment of the present application.

Explanation of symbols

[0089] 100: touch control system 110: touch control processing device 111:InterconnectionNetwork module 112: driving circuit module 113: sensing circuit module 114: processor module 115: interface module 116: non-volatile memory 120: touch panel or screen 121: first electrode 122: second electrode 130: stylus 135: touchpad eraser 140: Host 141: Input / output interface module 142: CPU module 143: Graphics processor module 144: memory module 145: network interface module 146: memory module 200: pen body 210: Line segment 220: Line segment 230: Line segment 240: Line segment 250: Middle part 400: Stylus 410: Conductor 411: Line segment 420: First stroke 421: Line segment 430: Second pen 431: Line segment 440: Fastener 500: Stylus 530: Second pen head 600: Stylus pen 610: Conductor 620: First pen tip 630: Second pen 640: Fastener 700: stylus 720: first pen tip 730: Second pen 740: Fastener 800: stylus 810: conductor 900: stylus 932: line segment 940: Wiping pen cap 941: Third pen head fastener 942: Third pen head 1100: Stylus pen 1132: Line segment 1140: Wipe pen cap DETAILED DESCRIPTION The terms "first", "second", "third", etc. (if any) in the specification and scope of the patent application of this application and the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects described in these descriptions can be interchanged where appropriate. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware circuits or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with drawings and specific implementation methods. Please refer to Figure 1 , which is a block diagram of a touch control system 100 according to an embodiment of the present invention. The touch control system 100 can be a common desktop, laptop, tablet personal computer, industrial control computer, smart phone or other computer system with touch function. The touch control system 100 may include a touch control processing device 110, a touch panel or screen 120 connected to the touch control processing device, and a host 140 connected to the touch control processing device 110. The touch control system 100 may further include one or more styluses 130 and / or touch pad erasers 135. Hereinafter, in this application, the touch panel or screen 120 may be generally referred to as a touch screen 120, but in an embodiment lacking a display function, a person skilled in the art will know that the touch screen referred to in this application is a touch panel. The touch screen 120 includes a plurality of first electrodes 121 parallel to the first axis and a plurality of second electrodes 122 parallel to the second axis. The first electrode 121 can be interlaced with the plurality of second electrodes 122 to form a plurality of sensing points or sensing areas. Similarly, the second electrode 122 can be interlaced with the plurality of first electrodes 121 to form a plurality of sensing points or sensing areas. In some embodiments, the present application may refer to the first electrode 121 as a first touch electrode 121, and the second electrode 122 as a second touch electrode 122. The present application also collectively refers to the first electrode 121 and the second electrode 122 as touch electrodes. In some embodiments of the touch screen 120, the first electrode 121 and the second electrode 122 are made of transparent materials. The first electrode 121 and the second electrode 122 can be in the same electrode layer, and the plurality of conductive sheets of each first electrode 121 or the second electrode 122 are connected by a bridge. The first electrode 121 and the second electrode 122 can also be in different electrode layers stacked up and down. Unless otherwise specified, the present application is generally applicable to embodiments of a single layer or multiple electrode layers. The first axis and the second axis are generally perpendicular to each other, but the present application does not limit the first axis to be perpendicular to the second axis. In one embodiment, the first axis may be a horizontal axis or an update axis of the touch screen 120. The first electrode 121 and / or the second electrode 122 may include a plurality of conductive sheets, and a person skilled in the art may refer to the applicant's previous patent applications to understand various embodiments of the first electrode 121 and / or the second electrode 122. The touch processing device 110 may include the following hardware circuit modules: an interconnection network module 111, a driving circuit module 112, a sensing circuit module 113, a processor module 114, an interface module 115, and a non-volatile memory 116. The touch processing device 110 may be implemented in a single integrated circuit, which may include one or more chips. The touch processing device 110 may also be implemented using multiple integrated circuits and an interconnected circuit board carrying the multiple integrated circuits. The touch processing device 110 may also be implemented in the same integrated circuit as the above-mentioned host 140, or in the same chip as the above-mentioned host 140. In other words, the present application does not limit the implementation method of the touch processing device 110. The connection network module 111 is used to respectively connect the plurality of first electrodes 121 and / or the plurality of second electrodes 122 of the touch screen 120. The connection network module 111 can receive control commands from the processor module 114, and is used to connect the driving circuit module 112 with any one or more touch electrodes, and is also used to connect the sensing circuit module 113 with any one or more touch electrodes. The connection network module 111 can include a combination of one or more multiplexers (MUX) to implement the above functions. The driving circuit module 112 may include components such as a frequency generator, a frequency divider, a frequency multiplier, a phase-locked loop, a power amplifier, a DC-DC voltage converter, a rectifier and / or a filter, and is used to provide a driving signal to any one or more touch electrodes through the above-mentioned connection network module 111 according to the control command of the processor module 114. Various analog signals or digital signals can be modulated for the above-mentioned driving signal to transmit certain information. The above-mentioned modulation methods include but are not limited to frequency modulation (FM), phase modulation, amplitude modulation (AM), double sideband modulation (DSB), single sideband modulation (SSB-AM), vestigial sideband modulation (Vestigial Sideband Modulation), amplitude shift modulation (ASK), phase shift modulation (PSK), quadrature amplitude modulation (QAM), frequency shift modulation (FSK), continuous phase modulation (CPM), code division multiple access (CDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDM), pulse width modulation (PWM) and other technologies. The driving signal may include one or more square waves, sine waves or any modulated waveforms. The driving circuit module 112 may include one or more channels, and each channel may be connected to any one or more touch electrodes through the connection network module 111 . The sensing circuit module 113 may include components such as an integrator, a sampler, a frequency generator, a frequency divider, a frequency multiplier, a phase-locked loop, a power amplifier, an operational amplifier, a multiplier, a DC-DC voltage converter, a rectifier and / or a filter, and is used to sense any one or more touch electrodes through the above-mentioned connection network module 111 according to the control command of the processor module 114. When the touch signal is sent through the above-mentioned one touch electrode, the other touch electrode can sense the touch signal. The sensing circuit module 113 can cooperate with the modulation method performed by the above-mentioned driving circuit module 112 to perform corresponding demodulation on the driving signal sensed by the other touch electrode, so as to restore the information carried by the driving signal. The sensing circuit module 113 may include one or more channels, each of which can be connected to any one or more touch electrodes through the connection network module 111. At the same time, each channel can perform sensing and demodulation simultaneously. In one embodiment, the driving circuit module 112 and the sensing circuit module 113 may include an analog front-end (AFE) circuit. In another embodiment, in addition to the analog front-end circuit, the driving circuit module 112 and the sensing circuit module 113 may include a digital back-end (DBE) circuit. When the driving circuit module 112 and the sensing circuit module 113 only include the analog front-end circuit, the digital back-end circuit may be implemented in the processor module 114. The processor module 114 may include a digital signal processor, which is used to connect the analog front-end circuits of the driving circuit module 112 and the sensing circuit module 113, and may also connect the digital back-end circuits of the driving circuit module 112 and the sensing circuit module 113. The processor module 114 may include an embedded processor, a non-volatile memory, and a volatile memory. The non-volatile memory may store a common operating system or a real-time operating system, and an application program executed under the operating system. The aforementioned operating system and application program include a plurality of instructions and data, which can be used to control other modules of the touch processing device 110, including the connection network module 111, the driving circuit module 112, the sensing circuit module 113, and the interface module 115, after the processor (including the embedded processor and / or the digital signal processor) executes these instructions. For example, the processor module 114 may include the 8051 series processor commonly used in the industry, the i960 series processor of Intel, the Cortex-M series processor of ARM, etc. The present application does not limit the type and number of processors included in the processor module 114 . The above-mentioned multiple instructions and data can be used to implement the various steps mentioned in this application, as well as the processes and methods composed of these steps. Some instructions can operate independently within the processor module 114, such as arithmetic and logic operations. Other instructions can be used to control other modules of the touch processing device 110, and these instructions can include the input and output interfaces of the processor module 114 to control other modules. Other modules can also provide information to the operating system and / or application executed by the processor module 114 through the input and output interfaces of the processor module 114. Ordinary technicians in this field should have general knowledge of computer organization and architecture, and can understand that the processes and methods mentioned in this application can be implemented by the above-mentioned modules and instructions. The interface module 115 may include various serial or parallel buses, such as Universal Serial Bus (USB), Integrated Circuit Bus (I2C), PCI, PCI-Express, IEEE1394 and other industrial standard input / output interfaces. The touch processing device 110 is connected to the host 140 via the interface module 115. The non-volatile memory 116 includes an erasable memory, such as an electronically erasable rewritable read-only memory (EEPROM) or a flash memory, which can retain the memory content after power failure. The processor 114 can load and execute the firmware in the non-volatile memory 116 to implement the touch processing function. The firmware can include a real-time operating system and corresponding instructions and programs required for the processor 114 to run. In one embodiment, the program and data contained in the firmware can be used to enable the touch processing device 110 to implement the embodiments provided in this application. The touch control system 100 may include one or more styluses 130 and / or touchpad erasers 135. The stylus 130 or touchpad eraser 135 may be a transmitter that emits an electrical signal, and may include an active transmitter that actively emits an electrical signal, or a passive transmitter that passively emits an electrical signal, or a reactive transmitter that emits an electrical signal in response to an external electrical signal. The stylus 130 or touchpad eraser 135 may include one or more electrodes for synchronously or asynchronously receiving an electrical signal from the touch screen 120, or for synchronously or asynchronously transmitting an electrical signal to the touch screen 120. These electrical signals may be modulated in one or more of the above-described ways. The stylus pen 130 or the touchpad eraser 135 may be a conductor for conducting a driving signal or grounding through the user's hand or body. The stylus pen 130 or the touchpad eraser 135 may be connected to the input / output interface module 141 of the host 140 or other modules under the input / output interface module 141 in a wired or wireless manner. The touch processing device 110 can detect one or more external conductive objects, such as human fingers, palms, or passive stylus 130 or touchpad eraser 135, through the touch screen 120, and can also detect the stylus 130 or touchpad eraser 135 that emits electrical signals. The touch processing device 110 can use mutual-capacitance or self-capacitance to detect external conductive objects. The above-mentioned stylus 130 or touchpad eraser 135 and the touch processing device 110 can use the above-mentioned signal modulation and corresponding signal demodulation methods to transmit information using electrical signals. The touch processing device 110 can use electrical signals to detect one or more proximity positions of the stylus 130 or the touchpad eraser 135 approaching or contacting the touch screen 120, the sensor status (such as a pressure sensor or button) on the stylus 130 or the touchpad eraser 135, the direction of the stylus 130 or the touchpad eraser 135, or the tilt angle of the stylus 130 or the touchpad eraser 135 relative to the plane of the touch screen 120. The host 140 is the main device for controlling the touch control system 110, and may include an input / output interface module 141 connected to the interface module 115, a central processing unit module 142, a graphics processing unit module 143, a memory module 144 connected to the central processing unit module 142, a network interface module 145 connected to the input / output interface module 141, and a storage module 146. The memory module 146 includes a non-volatile memory, common examples of which are a hard disk, an electronically erasable rewritable read-only memory (EEPROM), or a flash memory. The memory module 146 can store a common operating system and application programs executed under the operating system. The network interface module 145 can include a hardware network connection interface for wired connection and / or wireless connection. The network interface module 145 can comply with common industrial standards, such as the IEEE 802.11 wireless local area network standard, the IEEE 802.3 wired local area network standard, 3G, 4G, and / or 5G wireless communication network standards, Bluetooth wireless communication network standards, etc. The central processing unit module 142 can be directly or indirectly connected to the above-mentioned input / output interface module 141, graphics processor module 143, memory module 144, network interface module 145 and storage module 146. The central processing unit module 142 can include one or more processors or processor cores. Common processors can include processors of x86 and x64 instruction sets of Intel, AMD, and VIA, or processors of ARM instruction sets of Apple, Qualcomm, and MediaTek, and can also include other forms of complex computer instruction sets (CISC) or reduced computer instruction sets (RISC) processors. The aforementioned operating system and application programs include multiple instructions and data corresponding to the above-mentioned instruction sets, which can be used to control other modules of the touch control system 100 after being executed by the central processing unit module 142. The optional graphics processor module 143 is generally used to process the calculation part related to the graphics output. The graphics processor module 143 can be connected to the above-mentioned touch screen 120 to control the output of the touch screen 120. In some applications, the host 140 may not need the special processing of the graphics processor module 143, and can directly let the central processing unit module 142 perform the calculation part related to the graphics output. The host 140 may also include other Figure 1 Components or parts not shown, such as sound input and output interfaces, keyboard input interfaces, mouse input interfaces, trackball input interfaces and / or other hardware modules. A person skilled in the art should have general knowledge of computer structure and architecture, and can understand that the touch control system 100 mentioned in this application is only a schematic description, and the rest of the parts related to the technical features of the invention provided in this application need to refer to the specification and the scope of the patent application. In the mutual capacitance detection method, the driving circuit module 112 provides a driving signal to one of the multiple first electrodes 121 in a time-sharing manner. When providing the driving signal, the sensing circuit module 113 is caused to sense all the second electrodes 122 multiple times at the same time, so as to obtain multiple sets of one-dimensional array sensing information. Each set of one-dimensional array contains the sensing results for each second electrode 122. And these multiple sets of one-dimensional sensing information can be composed of two-dimensional array sensing information or sensing images according to the order of the first electrodes 121 that send the driving signals to which they correspond. Using the two-dimensional array or sensing image, the processor module 114 can detect whether there is an external conductive object close to the touch screen 120. For example, the above mutual capacitance detection method can be used to detect the passive capacitive stylus 130 and the touchpad eraser 135. In some embodiments, the passive capacitive touchpad eraser 135 can have more than three electrodes on the wiping surface. The touch processing device 110 can detect these electrodes and determine the wiping surface position of the touchpad eraser 135 according to the shape of the touch position corresponding to these electrodes, thereby allowing the host 140 to perform the wiping procedure. In one embodiment, the operating system or application program executed by the CPU 142 of the host 140 can modify the corresponding portion of the display screen by using the position of the wiping surface of the touchpad eraser 135 reported by the touch control processing device 110, such as changing the corresponding portion of the screen back to the set background color, such as white. When the user wants to use the stylus 130 to perform the erasing function, the user can first use the stylus 130 to click the button to switch the input mode to the erasing mode, or use other input devices such as a mouse and keyboard to switch the input mode to the erasing mode. The operating system or application executed by the central processor 142 of the host 140 then changes the corresponding part of the display screen based on the position of the tip of the stylus 130 reported by the touch processing device 110. For example, the corresponding part of the screen is changed back to the set background color, such as white. On the contrary, when the wipe mode is to be changed back to the input mode, the touch pen 130 can be used to click the button to switch from the wipe mode to the input mode, or other input devices such as a mouse and keyboard can be used to switch the wipe mode to the input mode. The operating system or application program executed by the CPU 142 of the host 140 then changes the corresponding part of the display screen based on the position of the tip of the touch pen 130 reported by the touch processing device 110. For example, the corresponding part of the screen is changed back to the set foreground color, such as black. Since the screen area corresponding to the tip of the stylus 130 is very small, if the user wants to wipe a larger screen area, the user must use the stylus 130 or other input devices to enlarge the corresponding screen area. Conversely, when the user wants to input a smaller screen area, the user must use the stylus 130 or other input devices to reduce the corresponding screen area. In other words, in addition to switching modes, the size of the screen area corresponding to the stylus 130 must be adjusted back and forth, which makes it very inconvenient for the user to use the stylus 130. Therefore, the present application provides a stylus 130 with two ends having input and erasing functions respectively. According to an embodiment of the present application, the stylus pen 130 is roughly cylindrical, and the user can hold the body of the stylus pen 130. However, the present application does not limit the shape of the body to a cylindrical shape. For example, the body can be an N-sided body, where N is a positive integer equal to or greater than 3. In some examples, the body can be a positive N-sided body. In order to reduce the weight of the stylus pen 130, the body of the stylus pen 130 can be made of an insulating material. The stylus pen 130 has a space inside to accommodate a conductive material. The conductive material inside can form a capacitor with the hand holding the stylus pen 130, so that the charge of the driving signal sent by the touch screen or panel 120 is conducted to the ground through the hand, so that the touch processing device 110 can detect the change of the charge and determine the position of the stylus pen 130 corresponding to the touch screen or panel 120. The space may be cylindrical, or may be an M-sided body or a regular M-sided body. M is a positive integer equal to or greater than 3. M may be equal to N. When M is equal to N, the shape of the space may correspond to the shape of the pen body. In one embodiment, the long central axis of the space may be on the same line as the long central axis of the pen body. In another embodiment, the long central axis of the space may not be on the same line as the long central axis of the pen body. Please refer to Figure 2 , which is a schematic cross-sectional view of a pen body 200 according to an embodiment of the present application. The cross section cuts through the long central axis of the pen body 200. Figure 2 As shown, the pen body 200 may be in an axisymmetric shape, where the axis is the long center axis of the pen body 200. The pen body 200 may be in a plane-symmetrical shape, where the plane is Figure 2 The space inside the pen body 200 may also be symmetrical in shape, with the axis being the long center axis of the pen body 200. The space inside the pen body 200 may be symmetrical in shape, with the plane being Figure 2 The cross section of the pen body 200 is shown. The middle part 250 of the pen body 200 is the part for the user to hold. The material of the pen body 200 can be one of the insulating materials such as plastic, fiberglass, wood, bamboo, etc., or any combination thereof. The present application does not limit the material of the pen body 200 to be the same or homogeneous. The pen body 200 can be composed of one or more parts. Due to the different materials, the way of combining the parts is also different. The present application also does not limit the number of parts of the pen body 200 and the way of combining them. The pen body 200 has an opening at each end of the long central axis. The cross-sections of the first opening on the left and the second opening on the right can be circular, N-gon or regular N-gon respectively. The present application does not limit the cross-sections of the first opening and the second opening to be the same. The center of the longitudinal cross-section of the first opening and the second opening can be located on the long central axis of the pen body 200, and the longitudinal cross-sections must be perpendicular to the long central axis of the pen body 200. Figure 2 The cross section of the pen body 200. Figure 2 As shown, the diameter of the first opening or the longest line segment 220 passing through the center of its longitudinal section may be equal to the diameter of the second opening or the longest line segment 230 passing through the center of its longitudinal section. However, in another embodiment, because the first opening is to accommodate the first end or the pen tip, and the second opening is to accommodate the second end or the eraser end, the line segment 220 may be smaller than the line segment 230. In order to facilitate the installation of the pen tip and the eraser end, the line segment 220 may be smaller than the diameter of the pen body 200 or the longest line segment 240 passing through the center of its longitudinal section, and the line segment 220 may also be smaller than the line segment 240. To reduce the weight of the stylus 130, the diameter of the space or the longest line segment 210 passing through the center of its longitudinal section may be larger than line segment 220 or line segment 230. In one embodiment, for ease of manufacturing or design, line segments 210, 220, and 230 may be the same. Please refer to Figure 3 As shown, it is a schematic diagram of a pen body 200 according to an embodiment of the present application. Figure 3 The directions shown are from Figure 2 The pen body 200 can be viewed from the left or right side of the pen body 200. There is a space in the middle of the pen body 200, and the second opening can be seen from the first opening. Please refer to Figure 4 As shown, it is a cross-sectional schematic diagram of a stylus pen 400 according to an embodiment of the present application. In addition to the pen body 200, the stylus pen 400 may include a conductor 410 placed in the internal space of the pen body 200, a first pen tip 420 at the first opening, and a second pen tip 430 at the second opening. The first pen tip 420 and the second pen tip 430 may be made of conductive materials, respectively connected to the conductor 410, and electrically coupled to each other. The conductor 410, the first pen tip 420, and the second pen tip 430 may include conductive foam or conductive fiber, or may be composed of artificial fiber or cotton core soaked in a conductive solution, wherein the above-mentioned conductive solution may contain carbon black, nanosilver or other suitable metals or conductive substances. In one embodiment, the conductor 410 may include a plastic sleeve for wrapping the above-mentioned conductive foam, conductive fiber, artificial fiber or / and cotton core, so that the portion of the conductor 410 in the space does not contact the pen body 200. In this embodiment, the shaping sleeve may be a hollow tube like a straw, but the present application does not limit the cross-section of the shaping sleeve to a circular shape. Although in Figure 4 Among them, the connection surface between the conductor 410 and the first pen tip 420 is a plane, but the present application is not limited to this. For example, when the conductor 410 includes conductive foam, the first pen tip 420 can be inserted into the conductor 410 so that the conductive foam wraps a part of the first pen tip, thereby increasing the contact area between the two. Similarly, the second pen tip 430 can be inserted into the conductor 410 so that the conductive foam wraps a part of the second pen tip, thereby increasing the contact area between the two. In a certain embodiment, the contact surface between the second pen tip 430 and the conductor 410 can be wavy or irregular in shape to increase the contact area between the two. The diameter of the conductor 410 or the longest line segment 411 through its longitudinal section may be smaller than the aforementioned line segment 210, and naturally smaller than the line segment 240. Since the user's hand holds the pen body 200, a pen body capacitance is formed between the hand and the conductor 410. A pen tip capacitance is formed between the first pen tip 420 and the touch screen or panel 120. Because the first pen tip 420 is electrically coupled to the conductor 410, the pen tip capacitance and the pen body capacitance are connected in series. Since the pen body capacitance is greater than the pen tip capacitance, the influence on the pen tip capacitance is very small, and will not affect the detection accuracy of the touch processing device 110 for the position where the first pen tip 420 approaches or contacts the touch screen or panel 120. Similarly, when the pen tip capacitance is formed between the second pen tip 430 and the touch screen or panel 120, the detection accuracy of the touch processing device 110 for the position where the second pen tip 430 approaches or contacts the touch screen or panel 120 will not be affected. Furthermore, since the pen body 200 is made of insulating material, it has almost no effect on the detection of the touch processing device 110. Therefore, the stylus pen 400 provided in the present application can improve the detection accuracy of the touch processing device 110 for the position of the first pen tip 420 or the second pen tip 430. Since the first pen tip 420 is used as a pen tip input, it needs to be made into a relatively slender and hard shape to improve the detection accuracy of the position of the first pen tip 420 by the touch processing device 110. Since the second pen tip 430 is used as an wiping end, it needs to be made into a relatively thick and heavy shape to increase the contact area of ​​the touch processing device 110 with the second pen tip 430, thereby expanding the corresponding wiping area. In other words, the diameter of the first pen tip 420 or the longest line segment 421 passing through its longitudinal section can be smaller than the diameter of the second pen tip 430 or the longest line segment 431 passing through its longitudinal section. Since the line segment 421 is smaller than the line segment 411, one or more fasteners 440 may be included at the connection between the first pen tip 420 and the pen body 220 to fix the first pen tip 420. The one or more fasteners 440 may be made of conductive material or non-conductive material. Figure 4There is no fastener at the connection between the second pen tip 430 and the pen body 220 , but in one embodiment, one or more fasteners may be included to fix the second pen tip 430 . Since the first nib 420 and the second nib 430 may be worn, the first nib 420 and the second nib 430 are replaceable. In one embodiment, in order to enhance the user experience, the conductor 410, the first nib 420 and the second nib 430 may be made of different materials. For example, the hardness of the first nib 420 may be greater than the hardness or density of the second nib 430 to reduce wear. The elasticity of the second nib 430 may be greater than the elasticity of the first nib 420 to simulate the user experience of a real blackboard eraser. The density and hardness of the conductor 410 may be the smallest among the three to reduce weight. exist Figure 4 In the embodiment shown, in addition to occupying the space inside the pen body 200, the conductor 410 occupies a portion inside the first opening or the second opening, so as to better fix the conductor 410 inside the pen body 200. One or more fasteners may be included on the surface of the portion inside the first opening or the second opening to fix the conductor 410. Since the line segment 431 is larger than the line segment 421, or the second pen tip 430 is larger than the first pen tip 420. Under the same pressure, the contact area between the second pen tip 430 and the touch screen or panel 120 is larger than the contact area between the first pen tip 420 and the touch screen or panel 120. For the touch processing device 110, it can be determined based on the size of the contact area whether the first pen tip 420 or the second pen tip 430 of the stylus 400 is close to or in contact with the touch screen or panel 120. When the touch processing device 110 determines that the first pen tip 420 is close, it can notify the host 140 to switch to the input mode, and the corresponding screen range can be reduced. When the touch processing device 110 determines that the second pen tip 430 is close, it can notify the host 140 to switch to the wiping mode, and the corresponding screen range can be reduced. The stylus provided in each of the following embodiments may follow the above principle, so that the touch processing device 110 determines which end of the stylus is in close contact with the touch screen or panel 120 . Please refer to Figure 5 , which is a cross-sectional schematic diagram of a stylus pen 500 according to an embodiment of the present application. Figure 4Compared with the stylus 400 shown in the figure, the conductor 410 and the second pen tip 430 have been combined to form a second pen tip 530 that is integrally formed. Most of the second pen tip 530 is located in the space in the pen body 200. The second pen tip 530 is in contact with the first pen tip 420 and is electrically coupled. In order to enhance the user experience, the first pen tip 420 and the second pen tip 530 can be made of different materials. For example, the hardness of the first pen tip 420 can be greater than the hardness or density of the second pen tip 530 to reduce wear. The elasticity of the second pen tip 530 can be greater than the elasticity of the first pen tip 420 to simulate the user experience of a real blackboard eraser. exist Figure 5 In the illustrated embodiment, the second nib 530 occupies the space of the second opening and a portion of the first opening so as to be fixed inside the pen body 200. In one embodiment, the stylus 500 may include one or more fasteners in the first opening and / or the second opening so as to fix the second nib 530 inside the pen body 200. In another embodiment, the surface inside the pen body 200 may include an integrally formed fastener so as to fix the second nib 530 inside the pen body 200. Please refer to Figure 6 , which is a cross-sectional schematic diagram of a stylus pen 600 according to an embodiment of the present application. Figure 4 Compared with the stylus pen 400 shown in FIG. 1 , the conductor 610 does not occupy the part inside the first opening or the second opening, but only occupies the internal space of the pen body 200. The conductor 610 can be fixed by connecting the first pen tip 620 and the second pen tip 630. Since the contact area between the first pen tip 620 and the one or more fasteners 640 inside the first opening of the pen body 200 is larger than that of the first pen tip 420, and the contact area between the second pen tip 630 and the second opening of the pen body 200 is larger than that of the second pen tip 430, the first pen tip 620 and the second pen tip 630 can be better fixed to the first opening and the second opening inside the pen body 200, respectively. Accordingly, the conductor 610 can be better fixed inside the pen body 200 by connecting with the first pen tip 620 and the second pen tip 630. In one embodiment, the conductor 610 does not need to be fixed, and the conductor 610 only needs to contact the first pen tip 620 and the second pen tip 630 to achieve electrical coupling. Because the stylus pen 600 is often hit or dropped, the joint may be broken or worn. Figure 6 The stylus pen 600 does not need to care whether the conductor 610 is fixed or not. Please refer to Figure 7 , which is a cross-sectional schematic diagram of a stylus pen 700 according to an embodiment of the present application. Figure 4Compared with the stylus 400 shown in the figure, the conductor 410 and the first pen tip 420 have been combined to form a first pen tip 720 that is integrally formed. Most of the first pen tip 720 is located in the space in the pen body 200. The second pen tip 730 is in contact with the first pen tip 720 and is electrically coupled. In order to enhance the user experience, the first pen tip 720 and the second pen tip 730 can be made of different materials. For example, the hardness of the first pen tip 720 can be greater than the hardness or density of the second pen tip 730 to reduce wear. The elasticity of the second pen tip 730 can be greater than the elasticity of the first pen tip 720 to simulate the user experience of a real blackboard eraser. exist Figure 7 In the illustrated embodiment, since the volume of the first pen tip 720 is smaller than the original conductor 410, the weight of the stylus pen 700 can be further reduced. Also, since the first pen tip 720 is longer, the length of one or more fasteners 740 of the stylus pen 700 is also longer to better fix the first pen tip 720. Please refer to Figure 8 , which is a cross-sectional schematic diagram of a stylus pen 800 according to an embodiment of the present application. Figure 4 Compared with the stylus pen 400 shown in FIG. 1 , the conductor 410, the first pen tip 420 and the second pen tip 430 are combined into an integrally formed conductor 810. Since the second end of the conductor 810 is thicker than the first end, the longitudinal cross-sectional area of ​​the conductor 810 in the internal space of the pen body 200 is gradually changed. Since the stylus pen 800 has only one-piece conductive body 810, it is more resistant to impact or falling. In addition, since the conductive body 810 is smaller than the original conductive body 410 in the internal space of the pen body, the weight of the stylus pen 800 can be further reduced. Please refer to Fig. 9 , which is a cross-sectional schematic diagram of a stylus pen 900 according to an embodiment of the present application. Figure 8 Compared with the stylus pen 800 shown in the figure, the stylus pen 900 is provided with an additional wiper pen cover 940. Fig. 9 The wipe pen cover 940 shown is applied to Figure 8 The eraser cap 940 is outside the conductor 810 of the stylus pen 800 shown, but the eraser cap 940 can be applied outside the second pen tip of the previous embodiments. The wiper pen cap 940 may include a third conductive pen tip 942 for electrically coupling with the second pen tip protruding from the second opening or the conductor 810. In this way, the user can make the contact area of ​​the third pen tip 942 larger when it contacts the touch screen or panel 120, making it easier for the touch processing device 110 to distinguish that it is the first pen tip of the stylus 900 or the wiper pen cap that contacts the touch screen or panel 120. The diameter of the third pen tip 942 or the longest line segment 932 passing through the center of its longitudinal section is larger than the line segment 431, but still smaller than the line segment 240. The wiper pen cover 940 may further include one or more third pen tip fasteners 941 for combining the third pen tip 942 with the pen body 200. The one or more third pen tip fasteners 941 may be made of a conductive material or a non-conductive material. The present application does not limit the material of the one or more third pen tip fasteners 941. Please refer to Fig.10 As shown, it is a schematic diagram of a wiper pen cover 940 according to an embodiment of the present application. Fig.10 The viewing angle shown is Fig. 9 The right side is looking toward the direction of the stylus pen 900 . The third pen tip 942 is in the middle, and the third pen tip fastener 941 surrounds the third pen tip 942 . Please refer to Fig.11 , which is a cross-sectional schematic diagram of a stylus pen 1100 according to an embodiment of the present application. Figure 8 Compared with the stylus pen 800 shown in the figure, the stylus pen 1100 is provided with an additional wiper pen cover 1140. Fig.11 The wipe pen cover 1140 shown is applied to Figure 8 The eraser cap 1140 is outside the conductor 810 of the stylus pen 800 shown, but the eraser cap 1140 can be applied outside the second pen tip of the previous embodiments. The wiper cap 1140 may include a conductive material for electrically coupling with the second pen tip or the conductor 810 protruding from the second opening. In this way, the user can make the wiper cap 1140 have a larger contact area when contacting the touch screen or panel 120, making it easier for the touch processing device 110 to distinguish that it is the first pen tip of the stylus 1100 or the wiper cap that contacts the touch screen or panel 120. The diameter of the wiper cap 1140 or the longest line segment 1132 passing through the center of its longitudinal section is larger than the line segment 240. According to one embodiment of the present application, a passive capacitive touch pen is provided, comprising: a pen body, which is made of non-conductive material and contains a space inside, and the two ends of the pen body respectively have a first opening and a second opening, the largest first line segment perpendicular to the central axis of the pen body in the first opening is smaller than the largest spatial line segment perpendicular to the central axis in the space, and the largest second line segment perpendicular to the central axis in the second opening is smaller than the spatial line segment; a conductor, which is located in the space, wherein the conductor comprises conductive foam; a first pen tip, which is made of conductive material, is located in the first opening, and protrudes out of the pen body in a first direction of the central axis, and the first pen tip contacts the conductor; and a second pen tip, which is made of conductive material, is located in the second opening, and protrudes out of the pen body in a second direction of the central axis, and the second pen tip contacts the conductor. In order to make it easier for the touch processing device to identify which end of the stylus pen contacts the touch screen or panel, the capacitive stylus pen further includes an wiping pen cover for covering and connecting the second pen tip protruding from the pen body, the wiping pen cover includes a conductive material, and the wiping pen cover is electrically coupled to the second pen tip. In order to make the erasable pen cover more firmly combined with the pen body, the erasable pen cover further includes: a third pen tip, which is made of conductive material and is used to cover and connect the second pen tip protruding from the pen body; and one or more third pen tip fasteners, which are used to fix the third pen tip to the pen body. In order to allow the user to use a larger contact area for wiping, the largest wiping pen cover line segment perpendicular to the central axis in the wiping pen cover should be larger than the largest pen body line segment perpendicular to the central axis. In order to reduce the weight of the stylus pen as much as possible, especially to reduce the volume of the conductor, the conductor further includes a shaping sleeve, which is used to wrap the conductive foam so that the portion of the conductor in the space does not contact the pen body. In order to stably fix the conductor inside the pen body and stably connect the first pen tip and the second pen tip, the conductor occupies part of the first opening and part of the second opening, the conductive foam wraps a part of the first pen tip, and the conductive foam wraps a part of the second pen tip. In order to reduce the number of parts and the manufacturing process, and to improve the degree of electrical coupling, the capacitive stylus pen further includes one of the following conditions: the conductor, the first pen tip and the second pen tip are integrally formed; the conductor and the first pen tip are integrally formed; and the conductor and the second pen tip are integrally formed. In order to fix a relatively small first pen tip inside the first opening, wherein the first line segment is smaller than the second line segment, the first opening further includes one or more fasteners for fixing the first pen tip inside the first opening. In order to enhance the different touches of the user at the two ends of the stylus when using the stylus, the hardness of the material of the first pen tip is greater than the hardness of the material of the second pen tip, the elasticity of the material of the second pen tip is greater than the elasticity of the material of the first pen tip, and the hardness of the conductive foam is less than the material of the first pen tip and the material of the second pen tip. According to an embodiment of the present application, a pen wiper as described above is provided. According to one embodiment of the present application, there is provided an wiping pen cap, which is suitable for a passive capacitive touch pen, wherein the capacitive touch pen comprises a pen body, a first pen tip, a second pen tip and a conductor, the pen body is made of a non-conductive material and contains a space inside, the two ends of the pen body respectively have a first opening and a second opening, the first pen tip is made of a conductive material, is located within the first opening, and protrudes out of the pen body in a first direction of the central axis of the pen body, the first pen tip contacts the conductor, the second pen tip is made of a conductive material, is located within the second opening, and protrudes out of the pen body in a second direction of the central axis, the second pen tip contacts the conductor, and is characterized in that the wiping pen cap is used to cover and connect the second pen tip protruding out of the pen body, the wiping pen cap comprises a conductive material, and the wiping pen cap is electrically coupled to the second pen tip. In order to make the erasable pen cover more firmly combined with the pen body, the erasable pen cover further includes: a third pen tip, which is made of conductive material and is used to cover and connect the second pen tip protruding from the pen body; and one or more third pen tip fasteners, which are used to fix the third pen tip to the pen body. In order to allow the user to use a larger contact area for wiping, the largest wiping pen cover line segment perpendicular to the central axis in the wiping pen cover should be larger than the largest pen body line segment perpendicular to the central axis.

Claims

1. A passive capacitive touch pen, characterized in that The pen body is made of a non-conductive material and contains a space inside. The two ends of the pen body have a first opening and a second opening respectively. The largest first line segment perpendicular to the central axis of the pen body in the first opening is smaller than the largest space line segment perpendicular to the central axis in the space. The largest second line segment perpendicular to the central axis in the second opening is smaller than the space line segment. A conductor is located in the space, wherein the conductor comprises conductive foam; A first pen tip, made of a conductive material, located in the first opening and protruding out of the pen body in a first direction of the central axis, the first pen tip contacts the conductor; as well as The second pen tip is made of a conductive material, is located in the second opening, and protrudes out of the pen body in the second direction of the central axis. The second pen tip contacts the conductor.

2. The passive capacitive touch pen as claimed in claim 1, characterized in that The invention further comprises an wiping pen cover for covering and connecting the second pen tip protruding from the pen body, wherein the wiping pen cover comprises a conductive material and is electrically coupled with the second pen tip.

3. The passive capacitive touch pen as claimed in claim 2, characterized in that The wipe pen set also includes: A third pen tip, the third pen tip is made of a conductive material and is used to cover and connect the second pen tip protruding from the pen body; and One or more third nib fasteners are used to fix the third nib to the pen body.

4. The passive capacitive stylus pen as claimed in claim 2, characterized in that The largest line segment of the wiping pen cover perpendicular to the central axis in the wiping pen cover is larger than the largest line segment of the pen body perpendicular to the central axis.

5. The passive capacitive stylus pen as claimed in claim 1, characterized in that The conductor further comprises a shaping sleeve, and the shaping sleeve is used to wrap the conductive foam so that the portion of the conductor in the space does not contact the pen body.

6. The passive capacitive stylus pen as claimed in claim 1, characterized in that The conductor occupies part of the first opening and part of the second opening, the conductive foam wraps a part of the first pen tip, and the conductive foam wraps a part of the second pen tip.

7. The passive capacitive stylus pen as claimed in claim 1, characterized in that Also includes one of the following conditions: The conductor, the first pen tip and the second pen tip are integrally formed; The conductor and the first pen tip are integrally formed; and The conductor and the second pen tip are formed as one piece.

8. The passive capacitive stylus pen as claimed in claim 1, characterized in that The first line segment is smaller than the second line segment, and the first opening further comprises one or more fasteners for fixing the first pen tip inside the first opening.

9. The passive capacitive stylus pen as claimed in claim 1, characterized in that The hardness of the material of the first pen tip is greater than that of the material of the second pen tip, the elasticity of the material of the second pen tip is greater than that of the material of the first pen tip, and the hardness of the conductive foam is less than that of the material of the first pen tip and the material of the second pen tip.

10. A wiping pen cap, suitable for a passive capacitive touch pen, wherein the capacitive touch pen comprises a pen body, a first pen tip, a second pen tip and a conductor, the pen body is made of a non-conductive material and contains a space inside, the two ends of the pen body have a first opening and a second opening respectively, the first pen tip is made of a conductive material, is located in the first opening, and protrudes out of the pen body in a first direction of the central axis of the pen body, the first pen tip contacts the conductor, the second pen tip is made of a conductive material, is located in the second opening, and protrudes out of the pen body in a second direction of the central axis, the second pen tip contacts the conductor, characterized in that The wiping pen cover is used for covering and connecting the second pen tip protruding from the pen body. The wiping pen cover comprises a conductive material, and the wiping pen cover is electrically coupled with the second pen tip.

11. The wiping pen cover according to claim 10, characterized in that The wipe pen set also includes: A third pen tip, the third pen tip is made of a conductive material and is used to cover and connect the second pen tip protruding from the pen body; and One or more third nib fasteners are used to fix the third nib to the pen body.

12. The wiping pen cover according to claim 11, characterized in that The largest line segment of the wiping pen cover perpendicular to the central axis in the wiping pen cover is larger than the largest line segment of the pen body perpendicular to the central axis.

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