CN219872334U - Electromagnetic touch pen - Google Patents
Electromagnetic touch pen Download PDFInfo
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- CN219872334U CN219872334U CN202320958936.XU CN202320958936U CN219872334U CN 219872334 U CN219872334 U CN 219872334U CN 202320958936 U CN202320958936 U CN 202320958936U CN 219872334 U CN219872334 U CN 219872334U
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 44
- 230000006698 induction Effects 0.000 claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
An electromagnetic stylus comprises a shell unit, a pressing unit and a resonance circuit unit. The shell unit comprises a main shell extending along the length direction and a limit shell arranged in the main shell and extending along the length direction. The pressing unit comprises a nib piece, a ferrite core fixedly connected with the nib piece along the length direction, and a position indication coil fixedly wound on the ferrite core. The resonance circuit unit comprises a pressure induction coil wound on the limit shell and spaced from the position indication coil along the length direction, and an integrated circuit board positioned in the main shell. The pressure induction coil and the position indication coil are electrically connected to the integrated circuit board together. The electromagnetic touch pen reduces the overall weight by the cooperation of the structure, so as to provide better operation handfeel.
Description
Technical Field
The present disclosure relates to touch pens, and more particularly, to an electromagnetic touch pen.
Background
An existing electromagnetic touch pen is matched with an electromagnetic touch pad for use. The electromagnetic touch pen comprises a cylindrical shell, a pen point piece, a ferrite core, a coil, ferrite sheets, an elastic component and a resonant circuit unit, wherein the ferrite core is arranged in the shell and connected with the pen point piece, the coil is arranged in the shell and wound on the ferrite core, the ferrite sheets are fixedly arranged in the shell and are arranged at intervals with the ferrite core, the elastic component is arranged in the shell and is propped against between the ferrite core and the ferrite sheets, and the resonance circuit unit is arranged in the shell and is electrically connected with the coil.
In actual use, the pen pressing piece is pressed against the electromagnetic touch pad, so that the pen point piece and the ferrite core are close to the ferrite sheet, the inductance value of the coil wound on the ferrite core is correspondingly changed due to the fact that the inductance value is close to the ferrite sheet, and the resonance frequency output by the resonance circuit unit is correspondingly changed. In this way, the electromagnetic touch panel can correspondingly calculate the pen pressure applied to the electromagnetic touch panel by the pen tip according to the resonance frequency output by the resonance circuit unit.
However, the conventional electromagnetic stylus pen has a somewhat cumbersome operation feel because it includes relatively large amounts of components such as the ferrite core, the ferrite sheet, and the coil. It is obvious that there is still a need for improvement in the existing electromagnetic stylus.
Disclosure of Invention
The present utility model is directed to an electromagnetic stylus that overcomes the above-mentioned drawbacks and provides a better operating feel.
The utility model relates to an electromagnetic stylus, which comprises a shell unit, a pressing unit and a resonance circuit unit; the shell unit comprises a main shell extending along the length direction and defining an outer opening, and a limit shell arranged in the main shell and extending along the length direction, wherein the limit shell defines an inner opening with a position corresponding to the outer opening; the pressing unit comprises a nib piece penetrating through the inner opening and the outer opening, a ferrite magnetic core which can move along the length direction and is arranged in the limiting shell and fixedly connected with the nib piece along the length direction, and a position indication coil which is arranged in the limiting shell and fixedly wound on the ferrite magnetic core; the resonance circuit unit is positioned in the main shell and comprises a pressure induction coil which is wound on the limit shell and is spaced from the position indication coil along the length direction, and an integrated circuit board positioned in the main shell, wherein the pressure induction coil and the position indication coil are electrically connected to the integrated circuit board together; the ferrite core is driven by the pen point piece to move between a non-contact position far away from the pressure induction coil and a contact position approaching to the pressure induction coil relative to the pressure induction coil.
The electromagnetic touch pen further comprises an elastic feedback unit positioned in the limit shell, wherein the limit shell is provided with a front shell part which is used for defining a front containing groove, a rear shell part which is fixedly connected with the front shell part along the length direction and is used for defining a rear containing groove which is communicated with the front containing groove, the front shell part is provided with a first front clamping wall and a first front surrounding wall which is connected with the first front clamping wall and extends along the length direction, the pressing unit further comprises a magnetic core clamping piece fixedly sleeved on the ferrite magnetic core, the magnetic core clamping piece is spaced from the position indication coil along the length direction, and the elastic feedback unit comprises an elastic body which is positioned in the rear containing groove and is used for enabling the ferrite magnetic core to contact and abut against, and a feedback spring which is abutted against between the magnetic core and the first front clamping wall of the front shell part along the length direction.
The electromagnetic stylus of the utility model, the front shell part also has a second front locking wall connected to the first front surrounding wall and spaced from the first front locking wall along the length direction, and a second front surrounding wall connected to the second front locking wall and extending along the length direction, the front containing groove has a first sub-containing groove defined by the first front locking wall, the first front surrounding wall and the second front locking wall together, and a second sub-containing groove defined by the second front locking wall and the second front surrounding wall together, and the magnetic core clamp and the feedback spring are limited in the first sub-containing groove together to drive the ferrite magnetic core to return to the non-contact position.
The pen point piece is provided with a mounting rod part which is positioned in the main shell and fixedly connected with the ferrite magnetic core, and a pen head part which is fixedly connected with the mounting rod part along the length direction and partially exposed out of the outer opening.
The electromagnetic touch pen provided by the utility model further comprises a carrier plate shell which is positioned in the main shell and fixedly connected with the limit shell along the length direction, wherein the carrier plate shell is provided with a bearing surface for placing the integrated circuit board.
The beneficial effects of the utility model are that: by arranging the ferrite core, the position indication coil and the pressure induction coil, the whole weight of the electromagnetic touch pen is reduced, and better operation handfeel is provided.
Drawings
FIG. 1 is a perspective combination diagram of one embodiment of an electromagnetic stylus of the present utility model;
FIG. 2 is an exploded perspective view of the embodiment;
FIG. 3 is a fragmentary, partially exploded perspective view of the embodiment with one main housing and one rear cover housing removed;
FIG. 4 is a fragmentary, partially cross-sectional schematic illustration of the embodiment and an electromagnetic touch pad illustrating a ferrite core of the embodiment in a non-contact position relative to a pressure-sensitive coil;
FIG. 5 is another fragmentary, partially cut-away schematic illustration of the embodiment and the electromagnetic touch pad illustrating the ferrite core of the embodiment in a touch down position relative to the pressure sensing coil.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, 2 and 3, an embodiment of the electromagnetic stylus of the present utility model includes a housing unit 1, a pressing unit 2, a resonant circuit unit 3, and an elastic feedback unit 4.
Referring to fig. 2 and 3, the housing unit 1 includes a main housing 11 extending along a length direction D1 and defining an outer opening 111, a limit housing 12 disposed in the main housing 11 and extending along the length direction D1, a carrier housing 14 disposed in the main housing 11, and a rear cover housing 15 cooperating with the main housing 11 to accommodate the limit housing 12, the carrier housing 14, the pressing unit 2 and the resonance unit 3.
The limiting housing 12 defines an inner opening 121 corresponding to the outer opening 111, and has a front housing portion 122 defining a front receiving space 123, and a rear housing portion 131 fixedly coupled to the front housing portion 122 along the length direction D1 and defining a rear receiving space 132 communicating with the front receiving space 123.
The front housing 122 has a first front locking wall 124, a first front surrounding wall 125 connected to the first front locking wall 124 along the length direction D1 and extending along the length direction D1, a second front locking wall 126 connected to the first front surrounding wall 125 along the length direction D1, and a second front surrounding wall 127 connected to the second front locking wall 126 along the length direction D1 and extending along the length direction D1. The second front locking wall 126 is spaced from the first front locking wall 124 along the length direction D1 and is connected between the first front surrounding wall 125 and the second front surrounding wall 127.
The front accommodating groove 123 has a first sub-accommodating groove 128 defined by the first front locking wall 124, the first front surrounding wall 125 and the second front locking wall 126, and a second sub-accommodating groove 129 defined by the second front locking wall 126 and the second front surrounding wall 127.
In the present embodiment, the limiting housing 12 is composed of an upper housing portion 133 and a lower housing portion 134, and the lower housing portion 134 is integrally fixed to the carrier housing 14. The limit housing 12, which is composed of the upper housing part 133 and the lower housing part 134, has the front housing part 122 defining the front accommodating groove 123 and the rear housing part 131 defining the rear accommodating groove 132.
The carrier housing 14 is fixedly connected to the limiting housing 12 along the length direction D1, and has a carrying surface 141 for placement.
The pressing unit 2 comprises a nib member 21 penetrating through the inner opening 121 and the outer opening 111, a ferrite core 22 movable along the length direction D1 and disposed in the limit housing 12 and fixedly connected with the nib member 21 along the length direction D1, a position indication coil 23 disposed in the limit housing 12 and fixedly wound on the ferrite core 22, and a core clamping member 24 fixedly sleeved on the ferrite core 22, wherein the core clamping member 24 is spaced from the position indication coil 23 along the length direction D1.
The nib member 21 has a mounting rod portion 211 disposed in the main housing 11 and fixedly connected to the ferrite core 22, and a nib portion 212 fixedly connected to the mounting rod portion 211 along the length direction D1 and partially exposed from the outer opening 111.
The resonance circuit unit 3 is located in the main housing 11, and the resonance circuit unit 3 includes a pressure sensing coil 31 wound around the limit housing 12 and spaced from the position indicating coil 23 along the length direction D1, and an integrated circuit board 32 located in the main housing 11 and disposed on the bearing surface 141, where the pressure sensing coil 31 and the position indicating coil 23 are electrically connected to the integrated circuit board 32 together. In this embodiment, the pressure sensing coil 31 is connected in series with the position indicating coil 23 and then electrically connected to the integrated circuit board 32. In a variation of the present embodiment, the pressure sensing coil 31 is electrically connected to the integrated circuit board 32 in parallel with the position indicating coil 23. In other words, the circuit connection relationship between the position indicating coil 23, the pressure sensing coil 31 and the integrated circuit board 32 can be adjusted according to the requirement of circuit design.
The elastic feedback unit 4 is disposed in the limiting housing 12, and the elastic feedback unit 4 includes an elastic body 41 disposed in the rear accommodating groove 132 for the ferrite core 22 to contact and abut against, and a feedback spring 42 abutting between the core clamping member 24 and the first front clamping wall 124 of the front housing 122 along the length direction D1.
In practice, the ferrite core 22 is adapted to be matched with an electromagnetic touch pad 9 to perform pressure sensing on the embodiment, and is driven by the pen tip 21 to move between a non-touching position (see fig. 4) and a touching position (see fig. 5) relative to the pressure sensing coil 31.
Referring to fig. 4, when the pen tip 21 does not touch the electromagnetic touch pad 9, the ferrite core 22 is far away from the pressure sensing coil 31 in the non-touched position.
Referring to fig. 5, until the nib member 21 touches the electromagnetic touch pad 9, the ferrite core 22 approaches the pressure sensing coil 31 at the touching position, so that the inductance value of the pressure sensing coil 31 correspondingly changes due to the approach of the ferrite core 22, and the resonant frequency outputted by the resonant circuit unit 3 correspondingly changes.
In this way, the electromagnetic touch panel 9 can correspondingly calculate the pen pressure applied to the electromagnetic touch panel 9 by the pen tip 21 according to the resonance frequency outputted from the resonance circuit unit 3, thereby achieving the effect of multi-stage pressure sensing.
Referring to fig. 3 and 4, once the nib member 21 stops contacting the electromagnetic touch pad 9, the core holder 24 and the feedback spring 42 are co-located in the first sub-receiving slot 128, so as to drive the ferrite core 22 to return to the non-contact position away from the pressure sensing coil 31.
Therefore, the electromagnetic stylus of the present utility model not only can make the electromagnetic touch pad 9 calculate the pen pressure applied by the pen tip 21 to the electromagnetic touch pad 9 according to the resonance frequency outputted by the resonance circuit unit 3, but also can reduce the overall weight of the electromagnetic stylus of the present utility model by providing the ferrite core 22, the position indication coil 23 and the pressure induction coil 31, thereby providing better operation hand feeling.
In summary, the electromagnetic stylus of the present utility model has simple overall structure and better operation hand feeling, so that the present utility model can achieve the purpose of the present utility model.
However, the foregoing is only illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims and their equivalents.
Claims (5)
1. An electromagnetic stylus comprises a shell unit, a pressing unit and a resonance circuit unit; the method is characterized in that: the shell unit comprises a main shell extending along the length direction and defining an outer opening, and a limit shell arranged in the main shell and extending along the length direction, wherein the limit shell defines an inner opening with a position corresponding to the outer opening; the pressing unit comprises a nib piece penetrating through the inner opening and the outer opening, a ferrite magnetic core which can move along the length direction and is arranged in the limiting shell and fixedly connected with the nib piece along the length direction, and a position indication coil which is arranged in the limiting shell and fixedly wound on the ferrite magnetic core; the resonance circuit unit is positioned in the main shell and comprises a pressure induction coil which is wound on the limit shell and is spaced from the position indication coil along the length direction, and an integrated circuit board positioned in the main shell, wherein the pressure induction coil and the position indication coil are electrically connected to the integrated circuit board together; the ferrite core is driven by the pen point piece to move between a non-contact position far away from the pressure induction coil and a contact position approaching to the pressure induction coil relative to the pressure induction coil.
2. The electromagnetic stylus of claim 1, wherein: the electromagnetic touch pen further comprises an elastic feedback unit located in the limiting shell, the limiting shell is provided with a front shell portion defining a front containing groove, a rear shell portion fixedly connected with the front shell portion in the length direction and defining a rear containing groove communicated with the front containing groove, the front shell portion is provided with a first front clamping wall and a first front surrounding wall connected with the first front clamping wall and extending in the length direction, the pressing unit further comprises a magnetic core clamping piece fixedly sleeved on the ferrite magnetic core, the magnetic core clamping piece is spaced from the position indication coil in the length direction, and the elastic feedback unit comprises an elastic body located in the rear containing groove for the ferrite magnetic core to contact and abut against, and an elastic body abutting against the magnetic core clamping piece in the length direction and between the first front clamping wall of the front shell portion.
3. The electromagnetic stylus of claim 2, wherein: the front shell part is also provided with a second front clamping wall connected with the first front surrounding wall and spaced from the first front clamping wall along the length direction, and a second front surrounding wall connected with the second front clamping wall and extending along the length direction, the front containing groove is provided with a first sub-containing groove jointly defined by the first front clamping wall, the first front surrounding wall and the second front clamping wall, and a second sub-containing groove jointly defined by the second front clamping wall and the second front surrounding wall, and the magnetic core clamping piece and the feedback spring are jointly limited in the first sub-containing groove and used for driving the ferrite magnetic core to return to the non-contact position.
4. The electromagnetic stylus of claim 1, wherein: the pen point piece is provided with a mounting rod part which is positioned in the main shell and fixedly connected with the ferrite magnetic core, and a pen head part which is fixedly connected with the mounting rod part along the length direction and partially exposed in the outer opening.
5. The electromagnetic stylus of claim 1, wherein: the shell unit also comprises a carrier plate shell which is positioned in the main shell and fixedly connected with the limit shell along the length direction, and the carrier plate shell is provided with a bearing surface for placing the integrated circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320958936.XU CN219872334U (en) | 2023-04-25 | 2023-04-25 | Electromagnetic touch pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320958936.XU CN219872334U (en) | 2023-04-25 | 2023-04-25 | Electromagnetic touch pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219872334U true CN219872334U (en) | 2023-10-20 |
Family
ID=88322051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320958936.XU Active CN219872334U (en) | 2023-04-25 | 2023-04-25 | Electromagnetic touch pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219872334U (en) |
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2023
- 2023-04-25 CN CN202320958936.XU patent/CN219872334U/en active Active
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