WO2020056832A1 - 一种电磁出水笔 - Google Patents

一种电磁出水笔 Download PDF

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Publication number
WO2020056832A1
WO2020056832A1 PCT/CN2018/110835 CN2018110835W WO2020056832A1 WO 2020056832 A1 WO2020056832 A1 WO 2020056832A1 CN 2018110835 W CN2018110835 W CN 2018110835W WO 2020056832 A1 WO2020056832 A1 WO 2020056832A1
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WO
WIPO (PCT)
Prior art keywords
iron core
pen
core
refill
cabin
Prior art date
Application number
PCT/CN2018/110835
Other languages
English (en)
French (fr)
Inventor
李远志
邓立明
Original Assignee
深圳市友基技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市友基技术有限公司 filed Critical 深圳市友基技术有限公司
Priority to US17/277,650 priority Critical patent/US11360583B2/en
Priority to EP18933769.4A priority patent/EP3855291B1/en
Priority to JP2021515603A priority patent/JP7174842B2/ja
Publication of WO2020056832A1 publication Critical patent/WO2020056832A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/22—Pens with writing-points other than nibs or balls with electrically or magnetically activated writing-points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00—Combinations of writing implements with other articles
    • B43K29/08—Combinations of writing implements with other articles with measuring, computing or indicating devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G06F3/0383—Signal control means within the pointing device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means

Definitions

  • the invention relates to the field of information input equipment, in particular to an electromagnetic water pen.
  • Electromagnetic touch is more and more sought after by people because it can perfectly present the original handwriting input.
  • the main components of electromagnetic touch include an antenna board, a control board, and an electromagnetic pen.
  • the electromagnetic pen is a key component of electromagnetic touch. Not only can it be controlled by points, but it can also use its pressure-sensitive characteristics to paint and practice characters.
  • the electromagnetic pen relies on its internal oscillation circuit and the antenna board on the device applying electromagnetic touch technology to transmit electromagnetic waves to achieve the positioning of the electromagnetic pen.
  • the electromagnetic pen generally consists of an inductor and a capacitor.
  • the inductor is composed of an iron core and a coil. Adjusting the value of the inductor or capacitor can change the frequency of the electromagnetic pen.
  • electromagnetic input technology has been widely used in electronic devices such as tablets, mobile phones, electronic paper books, pen tablets, and electronic whiteboards
  • common electromagnetic pens can only work on corresponding electromagnetic devices, and cannot write on paper. For this reason, electromagnetic pens with both electromagnetic writing and ink writing functions have appeared on the market.
  • variable capacitance technology is limited by the accuracy and price of variable capacitors, which makes it difficult to popularize electromagnetic pens in terms of performance and price.
  • electromagnetic water pen is composed of multiple parts, each part has its own manufacturing error, and each part is of a different material, so the problem of inconsistent size often occurs during assembly and production, resulting in the actual size of the electromagnetic pen when it leaves the factory is Larger than standard size, not conducive to mass production.
  • an object of the present invention is to provide an electromagnetic water pen with low price and good size consistency.
  • an electromagnetic water pen comprising a pen core, a shell and a pen body located in the shell, the shell includes a front shell and a back shell, and the pen body includes a first iron core and an iron core
  • the core cockpit is provided with a refill clamp connecting rod, a second core and a third core, and a coil is wound outside the first core and the second core, and the first core is close to The tip of the refill, the refill passes through the center of the first iron core and is clamped by one end of the refill holder link, and the other end of the refill holder link passes through the center of the second core and is then pushed
  • the third core moves; a PCBA circuit board is provided in the rear shell, and an elastic structure is provided between the PCBA circuit board and the iron core cabin.
  • the pen body further comprises a refill rod, and the refill passes through the center of the first iron core and the center of the refill rod in sequence and is held by one end of a refill holder link.
  • a groove is formed in the iron core cabin, and the groove is matched with the second iron core.
  • the second iron core is located inside the iron core cabin.
  • a screw post is provided behind the iron core cabin, a screw hole is provided on the PCBA circuit board, and the screw post is fixed on the screw hole by screws.
  • the iron core cabin includes a front portion of the iron core cabin and a tail portion of the iron core cabin, and the tail portion of the iron core cabin is combined with the front portion of the iron core cabin in a rotating manner.
  • the PCBA circuit board is provided with a PCBA peripheral fixed card position.
  • the elastic structure adopts a silicone ring.
  • an outer diameter of the second iron core is smaller than an outer diameter of the third iron core.
  • the pen body includes an iron core cabin and a first iron core wound with a coil.
  • the iron core cabin is provided with a pen core clamp connecting rod, a third iron core, and a second iron core wound with a coil.
  • the movement of the core in combination with the refill fixture link changes the distance between the second iron core and the third iron core to change the inductance of the passive electromagnetic water pen, thereby changing the frequency of the water pen.
  • Variable inductance technology is used to replace the variable capacitance Technology, lower price, better performance; added an elastic structure between the iron core cockpit of the front case and the PCBA circuit board of the rear case, during the process of assembling the front and rear cases and the pen body, the elastic margin of the elastic structure is eliminated
  • the assembly error makes the actual size of the electromagnetic pen in the factory equal to the standard size, which is conducive to mass production.
  • the elastic structure can also play a buffer role, reducing the probability of damage to the parts due to mechanical impact or wear, and prolonging the service life of the electromagnetic pen .
  • FIG. 1 is a schematic structural diagram of an electromagnetic water pen according to the present invention.
  • FIG. 2 is a sectional view of an electromagnetic water pen according to the present invention.
  • FIG. 3 is an exploded view of an embodiment of an electromagnetic water pen according to the present invention.
  • FIG. 4 is a structural exploded view of another embodiment of the electromagnetic water pen according to the present invention.
  • FIG. 5 is a schematic structural diagram of a PCBA circuit board
  • FIG. 6 is a graph showing a relationship between a distance between two iron cores and a coil inductance value according to the present invention.
  • an electromagnetic water pen includes a refill 1, a shell, and a pen body located in the shell.
  • the shell includes a front case (not shown) and a rear case (not shown).
  • the pen body includes a first iron core 2 and an iron core cockpit, and the iron core cockpit is provided with a pen core clamp connecting rod 3, a second iron core 4 and a third iron core 5, and the outside of the first iron core 2
  • a coil is wound around both the second iron core 4 and the first iron core 2 near the pen tip of the pen core 1.
  • the pen core 1 passes through the center of the first iron core 2 and is moved by the pen core clamp connecting rod 3.
  • a PCBA circuit board 7 is provided in the rear case, and the PCBA circuit board
  • An elastic structure 8 is provided between 7 and the iron core cabin.
  • the present invention uses a three-core structure to change the inductance.
  • the winding core of the first core 2 is close to the tip of the pen core and is responsible for receiving and transmitting energy.
  • the second iron core 4 is a wound iron core
  • the third iron core 5 is an unwound iron core.
  • the through hole in the center of the second iron core 4 is larger than that of the third iron core 5.
  • the two iron cores are placed behind the pen core, and the second iron core 4 is closer to the pen core tip than the third iron core 5
  • This structure can allow enough space behind the third iron core 5 to design internal elastic components and other structures, so that the pen tip has excellent force feedback performance.
  • the refill holder link 3 has a function of holding the refill and the link. As shown in FIG. 3 or FIG. 4, one end of the refill clamp link 3 can clamp the refill 1; the other end of the refill clamp link 3 has a link function and is an elongated plastic long rod.
  • the refill holder link 3 can be installed from the pen tip direction of the iron core cabin.
  • the refill 1 passes through the center of the first iron core 2 and is held by one end of the refill holder link 3, and the other end of the refill holder link 3 passes through the center of the second core 4 Furthermore, the third iron core 5 is moved to change the distance between the second iron core 4 and the third iron core 5 and cause the inductance value to change.
  • the air gap between the two iron cores is extremely small.
  • the iron core is slightly pushed by the pen core, the two iron cores
  • An air gap is created between the magnetic circuit (that is, the magnetic field closed loop), and the magnetic resistance is increased, and the inductance value is greatly reduced.
  • the present invention utilizes this characteristic, and when the pen core moves slightly, a sufficiently large change in pen frequency can be generated. Used in the use of fountain pens, electronic handwriting can be displayed when drawing lightly, and it can feel the same as the real ink pen and pencil.
  • the PCBA circuit board 7 has a fixed capacitance value.
  • the two winding inductors of the first iron core 2 and the second iron core 4 are connected in parallel with the on-board capacitor.
  • PCBA circuit board 7. Initially, the antenna board transmits a frequency to charge the pen. When the antenna board stops transmitting, the pen will change from receiving energy to transmitting energy, and the winding inductance on the pen will change. In parallel with the fixed capacitor on the PCBA circuit board 7, the pen will change. The frequency emitted by the pen, which in turn enables the antenna board to obtain different pen frequencies, resulting in changes in different pen pressure values.
  • the first iron core 2, the second iron core 4, and the third iron core 5 of the present invention may all be hollow structures, and the pen tip of the pen core 1 is on the left and the pen tail end is on the right.
  • the core cockpit includes a core cockpit front portion 61 and a core pod tail portion 62 that cooperate with each other, and the second core 4 can be fixed to the core cockpit front portion 61 from the pen tail direction;
  • the three iron cores 5 are located behind the second iron core 4 and are installed inside the iron core cockpit and can be moved in the iron core cockpit; the refill clamp link 3 passes through the center of the second iron core 4 and pushes the third iron core 5 in Move in the core cockpit.
  • the elastic structure 8 has a certain amount of elasticity and is used to eliminate the error of the tip of the electromagnetic absorbing water pen toward the pen tip axis, so that the actual size of the electromagnetic pen when it leaves the factory is equal to the standard size.
  • the elastic structure 8 can also play a buffering role to prevent parts such as the PCBA circuit board 7 and the iron core cabin from being damaged due to mechanical impact or wear, thereby extending the service life.
  • the elastic structure 8 can be realized by using a rubber ring (such as a silicone ring), an elastic metal sheet, a thin film sheet and other structures having elasticity.
  • the refill 1 of the present invention can be implemented by using an existing ink refill.
  • the pen body further includes a refill rod 9, and the refill 1 passes through the center of the first iron core 2 and the center of the refill rod 9 in this order. It is clamped by one end of the refill holder link 3.
  • the refill rod 9 is located between the first iron core 2 and the refill holder connecting rod 3 to protect the refill 1.
  • refill the refill holder link 3 from the direction of the pen tip of the iron core cabin; after refilling the refill holder link 3, combine the refill rod 9 from the direction of the pen tip with the front portion 61 of the iron core cabin.
  • a groove 611 is formed in the iron core cabin, and the groove 611 cooperates with the second iron core 4.
  • the second iron core 4 can be installed and fixed to the front part 61 of the iron core cabin (that is, the front part 61 of the iron core cabin is installed from the side) through the groove 611.
  • the second iron core 4 is located inside the iron core cabin. Specifically, the second iron core 4 can be completely installed and fixed inside the iron core cabin.
  • a screw post 10 is provided at the rear of the iron core cabin, a screw hole 11 is provided on the PCBA circuit board 7, and the screw post 10 is fixed by a screw 12. On the screw hole 11.
  • the screw hole 11 may be an oval hole
  • the screw post 10 may be a cylinder. Therefore, after the PCBA circuit board 7 is locked with the screw 12, it can move a small distance toward the pen tip or pen tip (a characteristic of the oval hole), which is convenient for Adjust the position during installation to reduce installation errors.
  • the core cockpit includes a core cockpit front portion 61 and a core cockpit tail portion 62.
  • the core cockpit tail portion 62 rotates with the core cockpit front portion in a rotating manner. 61 combined.
  • a step 31 is provided on the refill holder link 3.
  • the refill holder connecting rod 3 of the present invention one end clamps the refill 1 and the other end is an elongated plastic long rod with a step difference.
  • the refill holder link 3 has a link function, and the end of the link has a step 31 that can pass through the center of the second core 4 and push the third core 5 through the step 31 to move.
  • the PCBA circuit board 7 is provided with a PCBA peripheral fixing card position 71.
  • the elastic structure adopts a silicone ring.
  • an outer diameter of the second core is smaller than an outer diameter of the third core.
  • the outer diameter of the third core without winding in the present invention is larger than that of the second core with winding. Near the end of the second core, the outer diameter of the third core is reduced, so that the overall appearance of the pen will not be affected by the inside.
  • the uncoated third iron core results in a sudden appearance, and the overall appearance consistency is better.
  • a center of the second core is provided with a first through hole
  • a center of the third core is provided with a second through hole
  • a diameter of the first through hole is larger than that of the second through hole. diameter of.
  • the first through hole of the second iron core of the present invention has a larger diameter than the second through hole of the third iron core, which allows the refill to push the third iron core through the step at the end of the connecting rod of the refill clamp.
  • the working principle of an electromagnetic water pen according to the present invention is: when writing force is applied to the pen tip, the pen core passes through the center of the first iron core and is clamped by one end of the pen core clamp link, and the other end of the pen core clamp link Pass the center of the second iron core and push the third iron core through the step to form a different distance between the second iron core and the third iron core, so that the inductance value on the second iron core coil changes.
  • the change in inductance of the iron core and the inductance of the first core coil are connected in parallel with the fixed capacitance on the PCBA circuit board, thereby changing the frequency of the pen emission, resulting in changes in different pen pressure values.
  • the present invention adds an elastic structure between the iron core cockpit and the PCBA circuit board.
  • the assembly error is eliminated through the elastic margin of the elastic structure, so that the actual size of the electromagnetic pen when it leaves the factory is equal to
  • the standard size is conducive to mass production and improves the production straight-through rate.
  • the elastic structure can also play a buffering role, reducing the probability of parts being damaged due to mechanical impact or wear, and prolonging the service life of the electromagnetic pen.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Pens And Brushes (AREA)
  • Position Input By Displaying (AREA)

Abstract

本发明公开了一种电磁出水笔，包括笔芯、外壳和位于外壳内的笔本体，外壳包括前壳和后壳，笔本体包括第一铁芯和铁芯座舱，所述铁芯座舱设置有笔芯夹具连杆、第二铁芯和第三铁芯，第一铁芯外和第二铁芯外均绕有线圈，第一铁芯靠近笔芯的笔尖端，笔芯穿过第一铁芯的中心后被笔芯夹具连杆的一端夹持，笔芯夹具连杆的另一端穿过第二铁芯的中心进而推动第三铁芯运动；后壳内设有PCBA电路板，PCBA电路板与铁芯座舱之间设有弹性结构。本发明采用了变电感技术来取代变电容技术，价格更低，性能更好；在前壳的铁芯座舱与PCBA电路板之间增设了弹性结构，尺寸一致性好，有利于批量生产，且使用寿命长，可广泛应用于信息输入设备领域。

Description

一种电磁出水笔
技术领域
本发明涉及信息输入设备领域，尤其是一种电磁出水笔。
背景技术
随着数字化电子信息技术的不断发展，人机交互越来越贴近生活。电磁触控凭借其能够完美呈现原笔迹输入而越来越受到人们的追捧。
电磁触控主要器件包含天线板、控制板和电磁笔。其中电磁笔作为电磁触控的关键组成部分，不但可以点控，还可以利用其压感的特点进行绘画、练字等。
电磁笔依靠其内部的振荡电路与应用电磁触控技术设备上的天线板传递电磁波来实现电磁笔的定位。电磁笔的一般由电感和电容组成，其中电感由铁芯和线圈组成，调整电感或电容的值可以改变电磁笔的频率。
虽然电磁输入技术现已广泛应用在平板、手机、电纸书、手写板、电子白板等电子设备上，但常见的电磁笔只能工作在相应的电磁设备上，无法在纸张上进行书写。为此，市场上出现了同时具有电磁书写和墨水书写功能的电磁出水笔。
目前电磁出水笔，大都通过变电容技术来实现，但变电容技术受限于可变电容的精度与价格，使得电磁出水笔在性能、价格等方面出现了普及上的困难。此外，电磁出水笔是由多件零件组成的，各零件有各自制造误差，各零件又是不同材质，所以往往在组装生产时会产生尺寸不一致的问题，导致电磁笔出厂时的实际尺寸小于或大于标准尺寸，不利于批量生产。
发明内容
为解决上述技术问题，本发明的目的在于：提供一种价格低和尺寸一致性好的电磁出水笔。
本发明所采取的技术方案是：一种电磁出水笔，包括笔芯、外壳和位于外壳内的笔本体，所述外壳包括前壳和后壳，所述笔本体包括第一铁芯和铁芯座舱，所述铁芯座舱设置有笔芯夹具连杆、第二铁芯和第三铁芯，所述第一铁芯外和第二铁芯外均绕有线圈，所述第一铁芯靠近笔芯的笔尖端，所述笔芯穿过第一铁芯的中心后被笔芯夹具连杆的一端夹持，所述笔芯夹具连杆的另一端穿过第二铁芯的中心进而推动第三铁芯运动；所述后壳内设有PCBA电路板，所述PCBA电路板与铁芯座舱之间设有弹性结构。
进一步，所述笔本体还包括笔芯杆，所述笔芯依次穿过第一铁芯的中心和笔芯杆的中心后被笔芯夹具连杆的一端夹持。
进一步，所述铁芯座舱上开有凹槽，所述凹槽与第二铁芯相配合。
进一步，所述第二铁芯位于铁芯座舱的内部。
进一步，所述铁芯座舱后方设有螺丝柱，所述PCBA电路板上设有螺孔，所述螺丝柱通过螺丝固定在螺孔上。
进一步，所述铁芯座舱包括铁芯座舱前部和铁芯座舱尾部，所述铁芯座舱尾部以旋转的方式与铁芯座舱前部相结合。
进一步，所述笔芯夹具连杆上设有阶梯。
进一步，所述PCBA电路板上设有PCBA外设固定卡位。
进一步，所述弹性结构采用硅胶环。
进一步，所述第二铁芯的外径小于第三铁芯的外径。
本发明的有益效果是：笔本体包括铁芯座舱和绕有线圈的第一铁芯，铁芯座舱设置有笔芯夹具连杆、第三铁芯以及绕有线圈的第二铁芯，通过笔芯的运动配合笔芯夹具连杆改变第二铁芯和第三铁芯的间的距离来改变无源电磁出水笔的电感，进而改变出水笔的频率，采用了变电感技术来取代变电容技术，价格更低，性能更好；在前壳的铁芯座舱与后壳的PCBA电路板之间增设了弹性结构，在前后壳与笔本体组装的过程中，通过弹性结构的弹性余量消除组装误差，使得电磁出水笔出厂时的实际尺寸等于标准尺寸，有利于批量生产；同时弹性结构也能起到缓冲作用，减少零件因机械撞击或磨损而损坏的几率，延长电磁出水笔的使用寿命。
附图说明
图1为本发明电磁出水笔的结构示意图；
图2为本发明电磁出水笔的剖视图；
图3为本发明电磁出水笔的一种实施例结构分解图；
图4为本发明电磁出水笔的另一种实施例结构分解图；
图5为PCBA电路板的结构示意图；
图6为本发明两铁芯间距与线圈电感值的关系曲线图。
具体实施方式
下面结合说明书附图和具体实施例对本发明作进一步解释和说明。
参照图1至图4，一种电磁出水笔，包括笔芯1、外壳和位于外壳内的笔本体，所述外壳包括前壳（图中未示出）和后壳（图中未示出），所述笔本体包括第一铁芯2和铁芯座舱，所述铁芯座舱设置有笔芯夹具连杆3、第二铁芯4和第三铁芯5，所述第一铁芯2外和第二铁芯4外均绕有线圈，所述第一铁芯2靠近笔芯1的笔尖端，所述笔芯1穿过第一铁芯2的中心后被笔芯夹具连杆3的一端夹持，所述笔芯夹具连杆3的另一端穿过第二铁芯4的中心进而推动第三铁芯5运动；所述后壳内设有PCBA电路板7，所述PCBA电路板7与铁芯座舱之间设有弹性结构8。
本发明使用了三铁芯的结构来实现电感的改变，其中，第一铁芯2这一绕线铁芯，靠近笔芯的笔尖端，负责收发能量。而第二铁芯4为绕线铁芯，第三铁芯5为不绕线的铁芯。第二铁芯4中心的通孔，较第三铁芯5的中心通孔的大，这两铁芯置于笔芯后方，且第二铁芯4比第三铁芯5更靠近笔芯笔尖，这种结构可以让第三铁芯5的后方有足够的空间，去设计内部的弹性部件等结构，让笔尖有优异的力反馈表现。
笔芯夹具连杆3，具有夹持笔芯和连杆的功能。如图3或图4所示，笔芯夹具连杆3的一端可夹持笔芯1；笔芯夹具连杆3的另一端具有连杆功能，为一细长塑件长杆。笔芯夹具连杆3可从铁芯座舱的笔尖方向装入。
当笔芯受力时，笔芯1穿过第一铁芯2的中心后被笔芯夹具连杆3的一端夹持，笔芯夹具连杆3的另一端穿过第二铁芯4的中心进而推动第三铁芯5运动，改变第二铁芯4和第三铁芯5这两铁芯间的距离，造成电感值变化。
如图6所示，本发明当第二铁芯4和第三铁芯5这两铁芯紧贴时，两铁芯间气隙极小，当铁芯被笔芯微微推动时，两铁芯间产生气隙，此时磁路（即磁场封闭回路）上，增加了磁阻，电感值会大幅度地变低。本发明利用此特性，当笔芯微动时，就能产生够大的笔频率变化。运用在出水笔的使用场合，电子笔迹能在轻画时就能显现，能与真实的墨水笔、铅笔的使用感觉相同。
PCBA电路板7上有固定电容值，第一铁芯2和第二铁芯4这两绕线电感，与板上电容并联接 PCBA电路板7上。初始时天线板发射一频率对笔充电，当天线板停止发射时，笔会从接收能量改为发射能量，而笔上的绕线电感发生变化，与PCBA电路板7上的固定电容并联，会改笔发射的频率，进而使天线板能获得不同的笔频率，产生不同笔压值的变化。
如图1和2所示，本发明第一铁芯2、第二铁芯4和第三铁芯5可均为中空的结构，而笔芯1的笔尖端在左，笔尾端在右。如图3或图4所示，铁芯座舱包括相互配合的铁芯座舱前部61和铁芯座舱尾部62，第二铁芯4可从笔尾方向固定在铁芯座舱前部61；而第三铁芯5位于第二铁芯4之后，安装在铁芯座舱的内部，可在铁芯座舱中移动；笔芯夹具连杆3穿过第二铁芯4的中心后推动第三铁芯5在铁芯座舱中移动。
弹性结构8，具有一定的弹性余量，用于消除吸收电磁出水笔笔尖往笔尾轴方向的误差，使得电磁笔出厂时的实际尺寸等于标准尺寸。此外，弹性结构8还可以起到缓冲的作用，防止PCBA电路板7和铁芯座舱等零件因机械撞击或磨损而损坏，延长了使用寿命。弹性结构8可采用橡胶环（如硅胶环）、弹性金属片、薄膜片等具有弹性的结构来实现。
本发明的笔芯1可采用现有的墨水笔笔芯来实现。
如图1至图4所示，进一步作为优选的实施方式，所述笔本体还包括笔芯杆9，所述笔芯1依次穿过第一铁芯2的中心和笔芯杆9的中心后被笔芯夹具连杆3的一端夹持。
具体地，笔芯杆9位于第一铁芯2和笔芯夹具连杆3之间，可保护笔芯1。装配时先将笔芯夹具连杆3从铁芯座舱的笔尖方向装入；笔芯夹具连杆3装入后，再将笔芯杆9从笔尖方向与铁芯座舱前部61结合。
参照图4，进一步作为优选的实施方式，所述铁芯座舱上开有凹槽611，所述凹槽611与第二铁芯4相配合。具体地，第二铁芯4可以通过凹槽611安装固定于铁芯座舱前部61（即从侧面装入铁芯座舱前部61）。
参照图3，进一步作为优选的实施方式，所述第二铁芯4位于铁芯座舱的内部。具体地，第二铁芯4可以完全安装固定在铁芯座舱的内部。
如图3至图5所示，进一步作为优选的实施方式，所述铁芯座舱后方设有螺丝柱10，所述PCBA电路板7上设有螺孔11，所述螺丝柱10通过螺丝12固定在螺孔11上。
具体地，螺孔11可为椭孔，螺丝柱10可为圆柱，所以PCBA电路板7在锁上螺丝12后，还能往笔尖或笔尾方向小距离移动（椭孔的特性），方便在安装时进行位置调节，减少安装误差。
参照图3或图4，进一步作为优选的实施方式，所述铁芯座舱包括铁芯座舱前部61和铁芯座舱尾部62，所述铁芯座舱尾部62以旋转的方式与铁芯座舱前部61相结合。
参照图3或图4，进一步作为优选的实施方式，所述笔芯夹具连杆3上设有阶梯31。
本发明的笔芯夹具连杆3，一端夹持笔芯1，另一端为一有阶梯差的细长塑件长杆。当笔芯1受力时，笔芯夹具连杆3具有连杆功能，其连杆末端有一阶梯31，能够穿过第二铁芯4的中心，通过阶梯31推动第三铁芯5运动。
参照图5，进一步作为优选的实施方式，所述PCBA电路板7上设有PCBA外设固定卡位71。
如图4和5所示，当笔芯1、第一铁芯2、第二铁芯4、第三铁芯5、铁芯座舱等部件组装进外壳时，外壳的后壳会顶至PCBA外设固定卡位71上被固定，并且推往笔尖方向。由于笔本体置于前后壳内，当前后壳结合时，后壳会透过PCBA外设固定卡位71，将整个笔本体往前壳方向（即笔尖方向）紧迫，,能实现前壳和后壳的紧密贴合或连接。
进一步作为优选的实施方式，所述弹性结构采用硅胶环。
进一步作为优选的实施方式，所述第二铁芯的外径小于第三铁芯的外径。
本发明没绕线的第三铁芯外径，比绕线的第二铁芯的大；靠近第二铁芯的一端，第三铁芯外径缩小，使得笔的整体外观，不会因为内部有没绕线的第三铁芯而造成外观突兀，整体外观一致性较好。
进一步作为优选的实施方式，所述第二铁芯的中心开有第一通孔，所述第三铁芯的中心开有第二通孔，所述第一通孔的直径大于第二通孔的直径。
本发明第二铁芯的第一通孔，较第三铁芯的第二通孔的直径大，能让笔芯透过笔芯夹具连杆末端的阶梯来推动第三铁芯。
本发明一种电磁出水笔的工作原理为：在笔芯笔尖书写受力时，笔芯穿过第一铁芯的中心被笔芯夹具连杆的一端夹持，笔芯夹具连杆的另一端穿过第二铁芯的中心，通过阶梯推动第三铁芯运动，从而在第二铁芯与第三铁芯间形成不同的距离，使得第二铁芯线圈上的电感值发生改变，第二铁芯发生变化的电感和第一铁芯线圈的电感与PCBA电路板上的固定电容并联，进而改变笔发射的频率，产生不同笔压值的变化。此外，本发明在铁芯座舱与PCBA电路板之间增设了弹性结构，在前后壳与笔本体组装的过程中，通过弹性结构的弹性余量消除组装误差，使得电磁笔出厂时的实际尺寸等于标准尺寸，有利于批量生产，提高生产直通率；同时弹性结构也能起到缓冲作用，减少零件因机械撞击或磨损而损坏的几率，延长电磁笔的使用寿命。
以上是对本发明的较佳实施进行了具体说明，但本发明并不限于所述实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可做作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

  1. 一种电磁出水笔，其特征在于：包括笔芯、外壳和位于外壳内的笔本体，所述外壳包括前壳和后壳，所述笔本体包括第一铁芯和铁芯座舱，所述铁芯座舱设置有笔芯夹具连杆、第二铁芯和第三铁芯，所述第一铁芯外和第二铁芯外均绕有线圈，所述第一铁芯靠近笔芯的笔尖端，所述笔芯穿过第一铁芯的中心后被笔芯夹具连杆的一端夹持，所述笔芯夹具连杆的另一端穿过第二铁芯的中心进而推动第三铁芯运动；所述后壳内设有PCBA电路板，所述PCBA电路板与铁芯座舱之间设有弹性结构。
  2. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述笔本体还包括笔芯杆，所述笔芯依次穿过第一铁芯的中心和笔芯杆的中心后被笔芯夹具连杆的一端夹持。
  3. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述铁芯座舱上开有凹槽，所述凹槽与第二铁芯相配合。
  4. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述第二铁芯位于铁芯座舱的内部。
  5. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述铁芯座舱后方设有螺丝柱，所述PCBA电路板上设有螺孔，所述螺丝柱通过螺丝固定在螺孔上。
  6. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述铁芯座舱包括铁芯座舱前部和铁芯座舱尾部，所述铁芯座舱尾部以旋转的方式与铁芯座舱前部相结合。
  7. 根据权利要求1所述的一种电磁出水笔，其特征在于：所述笔芯夹具连杆上设有阶梯。
  8. 根据权利要求1-7任一项所述的一种电磁出水笔，其特征在于：所述PCBA电路板上设有PCBA外设固定卡位。
  9. 根据权利要求1-7任一项所述的一种电磁出水笔，其特征在于：所述弹性结构采用硅胶环。
  10. 根据权利要求1-7任一项所述的一种电磁出水笔，其特征在于：所述第二铁芯的外径小于第三铁芯的外径。
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