CN1242316C - Electromagnetic induction pen device with writing function - Google Patents

Abstract

The invention relates to an electromagnetic induction pen device with writing function, the design of the invention can combine an electromagnetic induction device and a writing device in a pen device, the electromagnetic induction device can be used as a pointer element of a handwriting input device, the writing device can provide the writing function of ink pen, in addition, the writing device can transmit the handwriting written on the paper to a handwriting input device synchronously, store in a memory, even present in a display, therefore, according to the design of the invention, the user does not need to carry various pen devices with different functions at the same time, and the convenience in use can be improved.

Description

Electromagnetic induction pen device with writing function

technical field

The invention relates to an electromagnetic induction device, in particular to an electromagnetic induction pen device with writing function.

Background technique

Computer input devices widely used today include keyboards and mice. With the development of digital technology, more and more computer users begin to use digital pads as input devices. Users can write or draw lines on the working area of the digital board, and send the signal to the computer for interpretation by the computer. Specifically, the working area on the digital board provides a writing surface to capture the position, pressure, and keys of an object (pen or mouse) and related information. A class of pen devices (pen-like device) is produced in conjunction with this digital board.

A pen-like device was disclosed in US Patent No. 4,697,050, as shown in FIG. 1A. The above-mentioned pen-like device includes an input device 110 and an erasing device 120 . The above-mentioned writing device 110 and erasing device 120 can perform writing and erasing functions on a digital board in the form of handwriting input. However, since the pen-like device used in the above-mentioned patent needs to have a built-in battery 130, it must be charged regularly during use, and the problem of battery failure or aging may occur. Furthermore, the above-mentioned pen-like device must have a leaky metal contact 135 for charging, which may cause leakage of electricity to the user. In addition, the above-mentioned pen-like device uses an oscillation circuit 140 and a charging circuit 145. This design will increase the complexity, failure rate, and cost of the circuit, and the oscillation circuit 140 will often cause large errors.

In another US Pat. No. 5,576,502, a type of pen device is also disclosed, as shown in FIG. 1B. The above-mentioned pen-like device is mainly provided with an erasing device 160 at the other end of an input device 150 . The above-mentioned erasing device 160 can function like an eraser on a digital board to erase the writing traces of the writing device 150 . However, in the above-mentioned pen-like device, in order to increase the above-mentioned eraser function, a large number of circuits and components are added, which will increase the complexity and cost of manufacturing the pen-like device.

Therefore, how to provide a pen-like device that can avoid the above-mentioned shortcomings in the prior art is a research subject of the present invention. In addition, with the development of handwriting input devices, how to provide an electromagnetic induction pen-like device with multiple functions is also a research subject of the present invention.

Contents of the invention

In view of the above-mentioned technical background of the invention and many shortcomings in the prior art in pen-like devices for handwriting input, the main purpose of the present invention is to provide an electromagnetic induction device with writing function. One end of the above-mentioned electromagnetic induction device with writing function has an electromagnetic induction device to provide the user with a handwriting input device for handwriting input. The other end of the electromagnetic induction device with writing function has a writing device for the user to write with a general ink pen.

Another object of the present invention is to provide an electromagnetic induction device with writing function. The writing device of the above-mentioned electromagnetic induction device with writing function can transmit the user's handwriting to a handwriting input device when writing.

Another object of the present invention is to provide an electromagnetic induction device with writing function. The electromagnetic induction device and the writing device of the above electromagnetic induction device with writing function can provide a pressure gradient function to present the user's handwriting on a display through a handwriting input device.

Another object of the present invention is to provide an electromagnetic induction device with writing function. The above-mentioned electromagnetic induction device with writing function does not need a built-in battery, so it does not need to be charged, and all the problems related to batteries in the prior art can be avoided.

Another object of the present invention is to provide an electromagnetic induction device with writing function. The above-mentioned electromagnetic induction device with writing function uses two resonant circuits, which have the advantages of simple design, easy adjustment, and low cost.

In order to achieve the above purpose, the present invention provides an electromagnetic induction device with writing function, which includes:

a support frame;

A first frame cover is located at one end of the supporting frame, and the first frame cover defines a first room;

a first elastic element accommodated in the first chamber;

A first hollow sleeve, one end of which leans against the first skeleton cover, the first hollow sleeve has a first outer surface and a first inner surface, and a first ring is arranged inside the first inner surface shaped partition to separate the first hollow sleeve into a first chamber and a second chamber, the second chamber is formed between the first annular partition and the first skeleton cover;

A first magnetic element, which has a first central through hole, one end of the first magnetic element is fastened and accommodated in the first chamber, and leans against the first annular spacer;

a second magnetic element having a second central through hole, one end of the second magnetic element abuts against the first annular spacer;

A first slider, movably housed in the second chamber, has a first cylindrical body, the first slider includes a first end and a second end, the first end The length is less than the length of the second magnetic element, a third chamber is formed inside the first end, and the second magnetic element is accommodated in the first end, so that the first sliding member is placed in the second chamber The second magnetic element can be synchronously driven when moving indoors, and the second end abuts against one end of the first elastic element;

A first pen core, passing through the first central through hole of the first magnetic element and the first annular spacer, so that one end thereof is clamped against the third chamber;

A first coil wound by at least one strand of wire is fixed on an outer surface of the first magnetic element at a position close to the end of the first annular spacer;

A second frame cover is located at the other end of the support frame, and the second frame cover defines a second compartment;

a second elastic element accommodated in the second chamber;

A second hollow sleeve, one end of which leans against the second skeleton cover, the second hollow sleeve has a second outer surface and a second inner surface, and a second ring is arranged inside the second inner surface shaped partition to divide the second hollow sleeve into a fourth chamber and a fifth chamber, the fifth chamber is formed between the second annular partition and the second skeleton cover;

A third magnetic element, which has a third central through hole, and one end of the third magnetic element is fastened and accommodated in the fourth chamber, and leans against the second annular spacer;

a fourth magnetic element having a fourth central through hole, one end of the fourth magnetic element leans against the second annular spacer;

A second sliding member is movably accommodated in the fifth chamber, and has a second cylindrical body, the second sliding member includes a third end and a fourth end, the third end The length is less than the length of the fourth magnetic element, a sixth chamber is formed inside the third end, the fourth magnetic element is accommodated in the third end, so that the second sliding member is placed in the fifth chamber When moving indoors, the fourth magnetic element can be synchronously driven, and the fourth end abuts against one end of the second elastic element;

A second pen core, passing through the third central through hole of the third magnetic element and the second annular spacer, so that one end thereof is clamped against the sixth chamber;

a second coil of at least one strand of wire fixed on an outer surface of the third magnetic element adjacent to the end of the second annular spacer; and

A printed circuit board is arranged on the support frame, and has two inductance-capacitance resonance circuits, and the two resonance circuits are electrically coupled with the first coil and the second coil respectively.

According to the above-mentioned purpose, the present invention provides an electromagnetic induction device with writing function. One end of the electromagnetic induction device with writing function has an electromagnetic induction device, and the other end has a writing device. The above electromagnetic induction device at least includes a brush core, a first magnetic element, a second magnetic element, and a first coil fixed on an outer surface of the first magnetic element. When the above-mentioned electromagnetic induction device is used to write on a digital board, the digital board applies an upward force to the above-mentioned pen core to change the inductance value of the first coil. The first coil can wirelessly transmit an electromagnetic field signal to the digital board to generate induced voltage. According to the above design, the above electromagnetic induction device can be used for handwriting input on a digital board or other handwriting input devices. On the other hand, the above-mentioned writing device at least includes an ink refill, a third magnetic element, a fourth magnetic element, and a second coil fixed on an outer surface of the third magnetic element. The above-mentioned writing device can provide the writing function of a general ink pen. More preferably, the above-mentioned writing device can also transmit an electromagnetic field signal to a digital board wirelessly. In other words, the above-mentioned writing device can simultaneously write on ordinary paper and transmit the written handwriting to a digital board, record it in a memory, and even present it on a display. Therefore, the electromagnetic induction device with writing function according to the present invention can be combined with an electromagnetic induction pen device and an electromagnetic induction pen device with ink pen function in a type of pen device, so as to improve the user's convenience when carrying and using. convenience.

Description of drawings

FIG. 1A is a schematic cross-sectional structure diagram of a prior art digital tablet pen device;

FIG. 1B is a schematic cross-sectional structure diagram of another prior art digital tablet pen device;

Fig. 2 is the structural representation of the electromagnetic induction pen device with writing function of the present invention;

3A is a schematic cross-sectional structure diagram of the electromagnetic induction device of the electromagnetic induction pen device with writing function of the present invention, the electromagnetic induction device in the figure is in a non-use state;

3B is a partial exploded view of the electromagnetic induction device of FIG. 3A;

FIG. 3C is a schematic cross-sectional structural diagram of the electromagnetic induction device in FIG. 3A , in which the electromagnetic induction device in the figure is in use;

FIG. 4 is a schematic circuit diagram of an electromagnetic induction pen device with writing function according to the present invention.

Explanation of symbols in the figure

110 input device

120 elimination device

130 batteries

135 metal contacts

140 oscillation circuit

145 charging circuit

150 input devices

160 elimination device

201 Electromagnetic induction device

202 shell

203 printed circuit board

204 supporting frame

205 first elastic element

206 first hollow sleeve

207 first magnetic element

208 second magnetic element

209 first slide

210 first refill

211 first coil

212 The first skeleton cover

213 outer surface

214 inner surface

215 first annular spacer

216 first-order surface

3 digital boards

250 writing devices

255 second elastic element

256 second hollow sleeve

257 third magnetic element

258 fourth magnetic element

259 second slide

260 second refill

261 second coil

262 second skeleton cover

263 outer surface

264 inner surface

265 second annular spacer

266 second-order surface

270 caps

272 elastic device

Detailed ways

Some embodiments of the present invention are described in detail as follows. However, the invention can be practiced broadly in other embodiments than those described in detail, and the scope of the invention is not limited, which is to be determined by the scope of the claims.

Furthermore, different parts of each element in this specification are not drawn to scale. Certain dimensions have been exaggerated compared to other relevant dimensions to provide a clearer description and understanding of the present invention.

A preferred embodiment of the present invention is an electromagnetic induction pen-like device with writing function. The above-mentioned electromagnetic induction pen device with writing function at least includes a support frame, an electromagnetic induction device is located at one end of the support frame, and a writing device is located at the other end of the support frame. The above-mentioned electromagnetic induction device can be used as a pointer element of a handwriting input device to provide users with handwriting input on the above-mentioned handwriting input device. The above-mentioned writing device can provide the writing function of a general ink pen. Even better, the above-mentioned writing device can synchronously output the handwriting track to the handwriting input device when writing on ordinary paper, and then store it in a memory, and even display it on a display.

The above-mentioned electromagnetic induction device at least includes a first elastic element, a first hollow sleeve, a first magnetic element, a second magnetic element, a first pen core, and at least one first coil fixed on the first magnetic element. An outer surface of a component. One end of the support frame has a first frame cover, and the first frame cover defines a first room. The above-mentioned first elastic element is located in the first chamber of the above-mentioned first skeleton cover. One end of the first hollow sleeve abuts against the first skeleton cover. And the inner surface of the above-mentioned first hollow sleeve can be divided into a first chamber and a second chamber by a first annular partition, wherein the above-mentioned second chamber is located between the first annular partition and the first skeleton. between the covers.

The above-mentioned first magnetic element has a first central through hole. One end of the first magnetic element is located in the first chamber and abuts against the first annular spacer. The above-mentioned second magnetic element has a second central through hole. One end of the second magnetic element is against the first annular spacer, and the second magnetic element can move in the second chamber. When an external force acts upward on the first pen core, the second magnetic element moves upward synchronously away from the first annular spacer. When no external force acts upward on the first refill, the above-mentioned first elastic element can provide an elastic force to make the second magnetic element return to the state of abutting against the first annular spacer.

On the other hand, the writing device according to the present embodiment has the same structure as the above-mentioned electromagnetic induction device. In other words, the above-mentioned writing device at least includes a second elastic element, a second hollow sleeve, a third magnetic element, a fourth magnetic element, a second refill, and at least a second coil fixed on the third An outer surface of the magnetic element. The only difference is that the above-mentioned second refill is a writable ink pen refill. In this way, the above-mentioned writing device can provide the writing function of a general ink pen. On the other hand, the above-mentioned writing device can synchronously transmit the handwriting track to a handwriting input device when writing on ordinary paper. In addition, the writing device according to this embodiment may further include a pen cap. When the writing device is not in use, the above-mentioned pen cap can prevent ink from spilling and damage to the above-mentioned ink pen refill when it is dropped, so as to be convenient for the user to carry.

More preferably, the second refill of the above-mentioned writing device can be replaced. The user can easily replace the ink refill when the ink is used up or according to different needs. Above-mentioned writing device also can be used as general ink pen at ordinary times.

In this embodiment, both the above-mentioned electromagnetic induction device and the writing device can provide the function of pressure gradient when performing handwriting input on a handwriting input device. In other words, the electromagnetic induction pen device with writing function according to this embodiment can present the user's writing force on a display through the handwriting input device. Moreover, the electromagnetic induction pen device with writing function according to this embodiment does not need a built-in battery, so problems such as battery aging and failure will not occur, and charging is not required.

According to the design of this embodiment, the functions of the electromagnetic induction device and the writing device can be combined into a type of pen device, so as to be convenient for the user to carry and use. The above electromagnetic induction device can be used as a pointer element of a handwriting input device to provide users with handwriting input on the handwriting input device. In addition to providing the writing function of a general ink pen, the above-mentioned writing device can also synchronously transmit the user's handwriting to the handwriting input device when writing on paper, to record it in a memory, and even present it on a display. . Therefore, according to the design of the present invention, a pen-like device including at least three functions can be provided to improve the convenience of the user in use and carrying.

Another preferred embodiment of the present invention is an electromagnetic induction pen-like device with writing function. The above-mentioned electromagnetic induction pen device with writing function includes an electromagnetic induction device, a writing device, and a support frame located between the electromagnetic induction device and the writing device. FIG. 2 is a schematic diagram of an electromagnetic induction pen-like device with writing function according to this embodiment. With reference to Fig. 2, above-mentioned electromagnetic induction device 201 comprises at least a first elastic element 205, a first hollow sleeve 206, a first magnetic element 207, a second magnetic element 208, a first slider 209, a first A first coil 211 formed by winding a core 210 and at least one strand of wire. The above-mentioned writing device 250 at least includes a second elastic element 255, a second hollow sleeve 256, a third magnetic element 257, a fourth magnetic element 258, a second sliding member 259, a second refill 260 and A second coil 261 formed by winding at least one wire.

FIG. 3A is a schematic cross-sectional view of an electromagnetic induction pen device with writing function according to the present embodiment, and FIG. 3B is a partial exploded view of the writing function according to the present embodiment. Referring to FIG. 3A and FIG. 3B , at the end of the electromagnetic induction device 201 , one end of the support frame 204 has a first frame cover 212 . The first frame cover 212 defines a first chamber for accommodating the first elastic element 205 . The first elastic element 205 can be a spherical elastic element, for example, a rubber ball. The first hollow sleeve 206 is hollow cylindrical and has a first outer surface 213 and a first inner surface 214 . One end of the first hollow sleeve 206 abuts against the first frame cover 212, and the other end is provided with a pair of first stepped surfaces 216, wherein one of the first stepped surfaces 216 engages with the outer casing 202, so that the first The hollow sleeve 206 is retained by the outer housing 202 . Referring to FIG. 3B , one end of the first hollow sleeve 206 has a set of concave structures for accommodating a set of protruding structures of the first skeleton cover 212 during assembly. A first annular spacer 215 is disposed inside the first inner surface 214 of the first hollow sleeve 206 to divide the first hollow sleeve 206 into a first chamber and a second chamber, wherein the second chamber forms between the first annular spacer 215 and the first frame cover 212 . The first annular spacer 215 is integrally formed with the first hollow sleeve 206 . The first magnetic element 207 has a first central through hole, and one end thereof is snapped and accommodated in the first chamber and leans against the first annular spacer 215 . The first magnetic element 207 is arranged and fixed in the electromagnetic induction device 201 . The second magnetic element 208 has a second central through hole. The second magnetic element 208 is movably accommodated in the second chamber, and one end thereof abuts against the first annular spacer 215 . The first magnetic element 207 and the second magnetic element 208 can be formed of iron powder core or high magnetic permeability material. In a preferred example, the length of the first magnetic element 207 is greater than the length of the second magnetic element 208 .

The first sliding member 209 is movably accommodated in the second chamber. 3A and 3B, the first slider 209 has a cylindrical body. The interior of the first sliding member 209 can be divided into a first end and a second end, wherein the second end is close to the first frame cover 212 . The second magnetic element 208 can be accommodated within the first end of the first sliding member 209 . When assembled, the second magnetic element 208 accommodated in the first end of the first slider 209 and the first slider 209 are movably accommodated in the second chamber of the first hollow sleeve 206, and One end thereof abuts against the first annular spacer 215 to facilitate the second magnetic element 208 to slide up and down in the first hollow sleeve 206 along with the first sliding member 209 . The length of the first end of the first sliding part 209 is slightly shorter than the length of the second magnetic element 208, so that the first end of the first sliding part 209 and the first annular spacer 215 of the first hollow sleeve 206 can be Maintain a small gap. This small gap is reserved for the length tolerance of the second magnetic element 208 . That is to say, the distance between the first end of the first sliding member 209 and the first annular spacer 215 of the first hollow sleeve 206 must be slightly larger than the length of the second magnetic element 208, so that the distance can be The second magnetic element 208 is accommodated within the allowable range of the length tolerance, so that the relative distance between the first magnetic element 207 and the second magnetic element 208 is fixed. Referring to FIG. 3A , a third chamber is formed inside the first end of the first sliding member 209 for accommodating and clamping an end of the first refill 210 . When the first slider 209 moves in the second chamber, it can drive the second magnetic element 208 synchronously. The second end of the first sliding member 209 abuts against one end of the first elastic element 205 .

The first refill 210 passes through the first central through hole of the first magnetic element 207 and the first annular spacer 215 , and one end thereof is clamped against the third chamber. The first pen 210 can be a ball refill. The above-mentioned third chamber has a holding function to hold the first refill 210, so that the first refill 210 can be replaced according to actual needs. The first coil 211 is fixed on an outer surface of the first magnetic element 207 at a predetermined position close to the end of the first annular spacer 215 . In a preferred example according to the present invention, the first coil 211 made of multi-strand wires can be wound on the outer surface of the first magnetic element 207 .

Referring to FIG. 3C, it is a sectional view of the use state of the digital pad wireless pen 201 according to the present invention. When the first pen core 210 writes on the digital pad 3, the digital pad 3 exerts a force upwards, so that the first pen core 210 and the second pen core 210 are connected to each other. A sliding member 209 moves upward synchronously, thereby pressing the first elastic element 205 . At this time, the second magnetic element 208 is also synchronously driven by the first sliding member 209 to move upwards, so that its relative position with the first magnetic element 207 changes, thereby reducing the inductance value of the first coil 211 . When the upward displacement of the second magnetic element 208 is larger, the inductance value of the first coil 211 is lowered, and the resonant frequency of the first coil 211 and the resonant circuit is higher. The second magnetic element 208 moves upwards to change the inductance value of the first coil 211, and the resonant frequency also changes accordingly. At this time, the first coil 211 wirelessly transmits an electromagnetic field signal with a frequency change, so that the digital board 3 receives and Generate an induced voltage.

When no external force acts upward on the first refill 210, the first elastic member 205 provides an elastic force to the first sliding member 209, so that the first sliding member 209 and the second magnetic member 208 are simultaneously against the first annular spacer. Part 215 on. Furthermore, when the first pen core 210 is not affected by the upward force of the digital board 3, the distance between the first magnetic element 207 and the second magnetic element 208 is determined by the thickness of the first annular spacer 215, which can be kept fixed. Therefore, the precise control of the relative position between the first magnetic element 207 and the second magnetic element 208 will not be affected by the tolerance value of the finished length of the first magnetic element 207 and the second magnetic element 208 . Therefore, when the first pen core 210 is under an upward external force, the frequency output value of the digitizer wireless pen 200 can be fixed.

In the electromagnetic induction device 201 according to the present invention, the first coil 211 formed by at least one strand of wire is directly wound on the outer surface of the first magnetic element 207 . The first coil 211 has an excellent Q value, and its ability to emit electromagnetic fields and induce electromagnetic fields is very strong. When the digital board 3 detects the pressure change of the wireless pen, the resolution is also improved due to the increase of the signal/noise ratio, and the conversion of the signal into pressure by the digital board is more realistic. Moreover, the electromagnetic field emitted by the digital board 3 can be directly absorbed by the first coil 211 to be used as its power, without additionally using a battery to provide power.

In this embodiment, a writing device 250 is further included on the other side of the support frame 204 . The above-mentioned writing device 250 at least includes a second elastic element 255, a second hollow sleeve 256, a third magnetic element 257, a fourth magnetic element 258, a second sliding member 259, a second refill 260 and A second coil 261 formed by winding at least one wire. Since the arrangement of the various components of the writing device is similar to that of the electromagnetic induction device, please refer to the above description of the electromagnetic induction device and the accompanying drawings for the arrangement of the components of the ink pen tip, and will not repeat them here. It should be noted that the second refill 260 of the writing device is an ink pen refill, so that the writing device can provide the writing function of an ink pen. Since the component structure of the above-mentioned writing device also includes the design of the electromagnetic induction device, the writing device can record the handwriting written on the paper in a handwriting input device when writing.

The writing device according to the present embodiment further includes a pen cover 270 , and a space is provided in the inside thereof for accommodating the front end of the writing device. When the writing device is not in use, the cap 270 can be snapped against the housing 202 of the writing device, as shown in FIG. 2 . The pen cap 270 can prevent ink from leaking and damaging the refill of the ink pen, and there is an elastic device 272 on the outside of the pen cap 270, which is convenient for the user to carry. The second refill 260 can be replaced by a holding device, not shown in the figure. When the ink of the second refill 260 is used up, or in response to the user's writing needs, the second refill 260 can be replaced immediately to provide convenience for writing.

According to the present embodiment, the electromagnetic induction pen device with writing function further includes a printed circuit board 203 disposed on the support frame 204, which includes two inductance-capacitance resonant circuits, and the two inductance-capacitance resonant circuits are connected to the first coil respectively. 211 and the second coil 261 are electrically coupled. FIG. 4 is a schematic circuit diagram of the electromagnetic induction pen device with writing function in FIG. 2 . Referring to FIG. 4 , L1 and L1A represent the first variable inductance generated by the first coil 211 of the digital pen end and the second variable inductance generated by the second coil 261 of the ink pen end, respectively. When the inductance value of the first coil 211 or the second coil 261 changes, an electromagnetic field signal of a different frequency can be wirelessly transmitted to the digital board 3, so that the digital board 3 generates an induced voltage to output the user's handwriting trace to the digital board 3.

Compared with the pen-like device in the prior art, the design according to the present invention uses two simple resonant circuits, which have the advantages of easy adjustment and low cost. Furthermore, according to the design of the present invention, since a built-in battery is not required, there is no risk of battery failure or aging or leakage, and there is no need to charge or replace the battery. Moreover, according to the design of the present invention, there will be no leaking metal points, which can avoid the risk of electric leakage caused by the user directly touching the internal circuit. In addition, the design of the present invention can provide pressure gradation performance, which can relatively show the user's writing force according to the degree of pen tip depression, so that the handwriting displayed on the display is closer to the user's handwriting. Even better, according to the design of the present invention, in addition to the electromagnetic induction device, an ink pen with electromagnetic induction function is provided at the other end of the electromagnetic induction device to provide the writing function of the ink pen, or to provide the user with an electromagnetic induction function. While writing on ordinary paper, the user's handwriting trajectory can be transmitted to a handwriting input device to be recorded in a memory and even presented on a display.

Based on the above, the present invention provides an electromagnetic induction pen-like device with writing function. The above-mentioned electromagnetic induction pen device with writing function has an electromagnetic induction device and a writing device. The above electromagnetic induction device and writing device respectively comprise at least one elastic element, a hollow sleeve, a first magnetic element, a second magnetic element, a slider, a core and a coil formed by at least one wire fixed on an outer surface of the first magnetic element. The above-mentioned electromagnetic induction device can provide the function of the pointer element when the user performs handwriting input on a handwriting input device. The above-mentioned writing device can provide ink pen writing function. Even better, the above-mentioned ink pen end can also transmit handwriting to a handwriting input device synchronously when writing on ordinary paper, to record in a memory, and even present it on a display. Therefore, the design of the present invention can combine the pointer element of the handwriting input device with the electromagnetic induction pen device with ink pen function in one type of pen device, so as to be convenient for the user to carry and use. In other words, according to the design of the present invention, the user only needs to carry a pen-like device according to the present invention to have multiple functions at the same time, so as to reduce the burden on the user and improve the convenience of use.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention; all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in the claims In the range.

Claims (9)

1. An electromagnetic induction device with writing function, characterized in that, the electromagnetic induction device with writing function comprises: a support frame; A first frame cover is located at one end of the supporting frame, and the first frame cover defines a first room; a first elastic element accommodated in the first chamber; A first hollow sleeve, one end of which leans against the first skeleton cover, the first hollow sleeve has a first outer surface and a first inner surface, and a first ring is arranged inside the first inner surface shaped partition to separate the first hollow sleeve into a first chamber and a second chamber, the second chamber is formed between the first annular partition and the first skeleton cover; A first magnetic element, which has a first central through hole, one end of the first magnetic element is fastened and accommodated in the first chamber, and leans against the first annular spacer; a second magnetic element having a second central through hole, one end of the second magnetic element abuts against the first annular spacer; A first slider, movably housed in the second chamber, has a first cylindrical body, the first slider includes a first end and a second end, the first end The length is less than the length of the second magnetic element, a third chamber is formed inside the first end, and the second magnetic element is accommodated in the first end, so that the first sliding member is placed in the second chamber The second magnetic element can be synchronously driven when moving indoors, and the second end abuts against one end of the first elastic element; A first pen core, passing through the first central through hole of the first magnetic element and the first annular spacer, so that one end thereof is clamped against the third chamber; A first coil wound by at least one strand of wire is fixed on an outer surface of the first magnetic element at a position close to the end of the first annular spacer; A second frame cover is located at the other end of the support frame, and the second frame cover defines a second compartment; a second elastic element accommodated in the second chamber; A second hollow sleeve, one end of which leans against the second skeleton cover, the second hollow sleeve has a second outer surface and a second inner surface, and a second ring is arranged inside the second inner surface shaped partition to divide the second hollow sleeve into a fourth chamber and a fifth chamber, the fifth chamber is formed between the second annular partition and the second skeleton cover; A third magnetic element, which has a third central through hole, and one end of the third magnetic element is fastened and accommodated in the fourth chamber, and leans against the second annular spacer; a fourth magnetic element having a fourth central through hole, one end of the fourth magnetic element leans against the second annular spacer; A second sliding member is movably accommodated in the fifth chamber, and has a second cylindrical body, the second sliding member includes a third end and a fourth end, the third end The length is less than the length of the fourth magnetic element, a sixth chamber is formed inside the third end, the fourth magnetic element is accommodated in the third end, so that the second sliding member is placed in the fifth chamber When moving indoors, the fourth magnetic element can be synchronously driven, and the fourth end abuts against one end of the second elastic element; A second pen core, passing through the third central through hole of the third magnetic element and the second annular spacer, so that one end thereof is clamped against the sixth chamber; a second coil of at least one strand of wire fixed on an outer surface of the third magnetic element adjacent to the end of the second annular spacer; and A printed circuit board is arranged on the support frame, and has two inductance-capacitance resonance circuits, and the two resonance circuits are electrically coupled with the first coil and the second coil respectively. 2. The electromagnetic induction device with writing function according to claim 1, characterized in that, when an external force acts upward on the first pen core, the first sliding member and the second magnetic element move upward synchronously away from the The first annular spacer, and when no external force acts upward on the first refill, the first elastic element provides an elastic force to the first slider, so that the first slider and the second magnetic element are simultaneously lean against the first annular spacer. 3. The electromagnetic induction device with writing function as claimed in claim 1, characterized in that, when an external force acts upward on the second pen core, the second sliding member and the fourth magnetic element move upwards synchronously away from the The second annular spacer, and when no external force acts upward on the second pen core, the second elastic element provides an elastic force to the second sliding element, so that the second sliding element and the fourth magnetic element simultaneously lean against the second annular spacer. 4. The electromagnetic induction device with writing function as claimed in claim 1, wherein the second refill is an ink refill. 5. The electromagnetic induction device with writing function according to claim 1, characterized in that, the material of the first magnetic element, the second magnetic element, the third magnetic element and the fourth magnetic element is iron powder core Or high magnetic permeability material. 6 . The electromagnetic induction device with writing function as claimed in claim 1 , further comprising an outer casing for accommodating the electromagnetic induction device with writing function. 7. The electromagnetic induction device with writing function according to claim 1, wherein when an external force is applied upward to the first pen core, the external force acts on the first sliding member through the first pen core On the other hand, the first slider and the second magnetic element are moved upward synchronously to press the first elastic element, thereby causing the relative position between the second magnetic element and the first magnetic element to change, resulting in the inductance value of the first coil changes, thus changing the resonant frequency of the resonant circuit. 8. The electromagnetic induction device with writing function according to claim 1, wherein when an external force is applied upward to the second pen core, the external force acts on the second sliding member through the second pen core On the other hand, the second slider and the fourth magnetic element are moved upward synchronously to press the second elastic element, thereby causing the relative position between the fourth magnetic element and the third magnetic element to change, resulting in the inductance value of the second coil changes, thus changing the resonant frequency of the resonant circuit. 9. The electromagnetic induction device with writing function according to claim 1, wherein the first elastic element and the second elastic element are respectively a rubber ball.

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