CN118068973A - Pressure sensing mechanism of touch control pen and electronic pen - Google Patents
Pressure sensing mechanism of touch control pen and electronic pen Download PDFInfo
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- CN118068973A CN118068973A CN202410031456.8A CN202410031456A CN118068973A CN 118068973 A CN118068973 A CN 118068973A CN 202410031456 A CN202410031456 A CN 202410031456A CN 118068973 A CN118068973 A CN 118068973A
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- seat
- pen
- strain gauge
- pressure sensing
- sensing mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 230000033001 locomotion Effects 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims description 36
- 230000008859 change Effects 0.000 claims description 5
- 241001422033 Thestylus Species 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a pressure sensing mechanism of a touch pen and an electronic pen, wherein the pressure sensing mechanism comprises an FPC control board, a pen point, a motion seat, a fixed seat and a strain gauge, and the pen point is arranged at the front end of the motion seat; the fixed seat is arranged at the rear side of the moving seat and is spaced from the moving seat by a preset distance; the front end and the rear end of the strain gage are respectively connected with the motion seat and the fixed seat; the FPC control board is electrically connected with the strain gauge. The invention adopts the strain gauge to detect the writing pressure of the pen point, has simple structure and low cost, reserves a gap between the motion seat and the fixed seat, protects the strain gauge to work in an elastic range, and realizes overload protection.
Description
Technical Field
The invention relates to the technical field of capacitance pens, in particular to a pressure sensing mechanism of a touch pen and an electronic pen.
Background
The pressure sensor is adopted by the existing active electronic pen to detect the pressure of the pen point during writing, such as a pen point pressure sensing mechanism and an electronic pen disclosed in patent application number 201920867828.5. If the nib is subjected to excessive pressure, the pressure sensor may be damaged. Therefore, the existing active electronic pen is designed with an overpressure protection mechanism to protect the pressure sensor and prevent the pressure sensor from being crushed, such as a nib pressure sensing transmission mechanism and an electronic pen disclosed in patent application number 2022223930611.
The existing active electronic pen has complex structure, complex assembly and high cost.
Disclosure of Invention
The embodiment of the invention aims to solve the technical problem of providing a pressure sensing mechanism of a touch pen and an electronic pen, which are used for simplifying the structure and realizing writing pressure detection and overvoltage protection.
In order to solve the technical problems, the embodiment of the invention provides a pressure sensing mechanism of a touch pen, which comprises an FPC control board, a pen point, a motion seat, a fixed seat and a strain gauge, wherein the pen point is arranged at the front end of the motion seat; the fixed seat is arranged at the rear side of the moving seat and is spaced from the moving seat by a preset distance; the front end and the rear end of the strain gage are respectively connected with the motion seat and the fixed seat; the FPC control board is electrically connected with the strain gauge.
Further, the strain gauge further comprises an elastic substrate A matched with the strain gauge, and the elastic substrate A is attached to the strain gauge.
Further, the elastic substrate A is arranged on the inner side of the strain gauge, and the front end and the rear end of the elastic substrate A are respectively connected with the moving seat and the fixed seat.
Further, the device also comprises an elastic substrate B, wherein the elastic substrate B and the elastic substrate A are symmetrically arranged on the other sides of the motion seat and the fixed seat, and the front end and the rear end of the elastic substrate B are respectively connected with the motion seat and the fixed seat.
Further, the middle portion of the strain gage is bent.
Further, the front end of the motion seat is provided with a nib groove, the nib is arranged in the nib groove, and the nib is in interference connection with the motion seat.
Correspondingly, the embodiment of the invention also provides an electronic pen, which comprises the pressure sensing mechanism of the touch pen.
Further, the FPC control board detects writing pressure of the pen point by detecting resistance change of the strain gauge.
The beneficial effects of the invention are as follows: the invention adopts the strain gauge to detect the writing pressure of the pen point, has simple structure and low cost, reserves a gap between the motion seat and the fixed seat, protects the strain gauge to work in an elastic range, and realizes overload protection.
Drawings
Fig. 1 is a perspective view of a pressure sensing mechanism of a stylus according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a pressure sensing mechanism of a stylus according to an embodiment of the invention.
Fig. 3 is an enlarged view of a part of the structure at a in fig. 2.
Fig. 4 is a side view of a strain gauge and elastomeric substrate a of an embodiment of the present invention.
Description of the reference numerals
The pen comprises an FPC control board 1, a pen point 2, a motion seat 3, a fixed seat 4, a strain gauge 5, an elastic substrate A6 and an elastic substrate B7.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other, and the present application will be further described in detail with reference to the drawings and the specific embodiments.
In the embodiment of the present invention, if there is a directional indication (such as up, down, left, right, front, and rear … …) only for explaining the relative positional relationship, movement condition, etc. between the components in a specific posture (as shown in the drawing), if the specific posture is changed, the directional indication is correspondingly changed.
In addition, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1 to 4, a pressure sensing mechanism of a touch pen according to an embodiment of the present invention includes an FPC control board, a pen tip, a motion housing, a fixing base, and a strain gauge.
The nib is arranged at the front end of the motion seat. The fixed seat is arranged at the rear side of the moving seat, and the front end and the rear end of the strain gauge are respectively connected with the moving seat and the fixed seat. The fixed seat and the moving seat are separated by a preset distance, so that the strain gauge is prevented from being excessively bent, the strain gauge is protected to work in an elastic range, and overload protection is realized. Preferably, the strain gage is curved in the middle. The preset distance is within the elastic deformation interval of the strain gauge, so that the strain gauge can have good consistency in repeated use.
The FPC control board is electrically connected to the strain gauge, preferably, at each point of the front and rear ends of the strain gauge, to detect the resistance value of the strain gauge. The resistance of the strain gage decreases when the strain gage is compressively strained. The FPC control panel detects the resistance change, and obtains corresponding millivolt-level potential output through a bridge circuit.
As one implementation mode, the pressure sensing mechanism of the touch pen further comprises an elastic substrate A matched with the strain gauge, and the elastic substrate A is attached to the strain gauge. The elastic substrate A is made of elastic materials, preferably steel sheets, and is used for prolonging the service life of the strain gauge and improving the reset elastic force of the motion seat. The elastic substrate A is arranged on the inner side of the strain gauge, and the front end and the rear end of the elastic substrate A are respectively connected with the moving seat and the fixed seat. In specific implementation, the elastic substrate A is closely attached to the strain gauge.
As one implementation mode, the pressure sensing mechanism of the touch pen further comprises an elastic substrate B, wherein the elastic substrate B and the elastic substrate A are symmetrically arranged on the other sides of the motion seat and the fixed seat, and the front end and the rear end of the elastic substrate B are respectively connected with the motion seat and the fixed seat. The elastic substrate B and the elastic substrate A are symmetrically arranged, so that the compression of the motion seat is more uniform when the pen point writes, and the writing hand feeling is improved. The elastic substrate B and the elastic substrate A are used for resetting the moving seat, loosening the pen point, and the moving seat is quickly reset under the action of the elastic force of the elastic substrate B and the elastic substrate A.
In the specific implementation, the elastic substrate B and the elastic substrate A can be fixed with the fixed seat and the moving seat by gluing.
As an implementation mode, the front end of the motion seat is provided with a nib groove, the nib is arranged in the nib groove, and the nib is in interference connection with the motion seat (namely, between the nib and the inner wall of the nib groove), so that a user can conveniently insert and withdraw the nib, and replacement and assembly are convenient.
The electronic pen comprises a pressure sensing mechanism of a touch pen. In specific implementation, the pressure sensing mechanism of the touch control pen is arranged in the pen body of the electronic pen, the FPC control board and the fixing seat are fixed in the pen body of the electronic pen, and the fixing seat and the movement seat are coaxially arranged. The FPC control panel of the electronic pen detects the writing pressure of the pen point by detecting the resistance change of the strain gauge.
The working principle of the invention is as follows: when the pen point is pressed (namely writing), the pen point pushes the movable seat to move, and the movable seat compresses the strain gauge to enable the strain gauge to generate (stretch) deformation, so that the FPC control panel senses the change of the electric signal; the nib is not pressed, and the movable seat is restored to the original state. When the nib receives excessive pressure, the movable seat is attached to the fixed seat and does not move any more, so that overload protection is achieved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. The pressure sensing mechanism of the touch control pen comprises an FPC control board and a pen point, and is characterized by further comprising a motion seat, a fixed seat and a strain gauge, wherein the pen point is arranged at the front end of the motion seat; the fixed seat is arranged at the rear side of the moving seat and is spaced from the moving seat by a preset distance; the front end and the rear end of the strain gage are respectively connected with the motion seat and the fixed seat; the FPC control board is electrically connected with the strain gauge.
2. The stylus pressure sensing mechanism of claim 1, further comprising an elastic substrate a mated with the strain gauge, the elastic substrate a being disposed in registry with the strain gauge.
3. The pressure sensing mechanism of a stylus according to claim 2, wherein the elastic substrate a is disposed inside the strain gauge, and the front and rear ends of the elastic substrate a are respectively connected to the motion base and the fixing base.
4. The touch pen pressure sensing mechanism of claim 3, further comprising an elastic substrate B symmetrically disposed on the other sides of the motion base and the fixed base with respect to the elastic substrate a, wherein the front and rear ends of the elastic substrate B are respectively connected to the motion base and the fixed base.
5. The stylus pressure sensing mechanism of claim 1, wherein the strain gage middle portion is curved.
6. The pressure sensing mechanism of a stylus of claim 1, wherein the front end of the motion base is provided with a nib slot, the nib is received in the nib slot, and the nib is in interference connection with the motion base.
7. An electronic pen comprising a pressure sensing mechanism of a stylus according to any one of claims 1-6.
8. The electronic pen of claim 7, wherein the FPC control board detects writing pressure of the pen tip by detecting resistance change of the strain gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410031456.8A CN118068973A (en) | 2024-01-09 | 2024-01-09 | Pressure sensing mechanism of touch control pen and electronic pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410031456.8A CN118068973A (en) | 2024-01-09 | 2024-01-09 | Pressure sensing mechanism of touch control pen and electronic pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118068973A true CN118068973A (en) | 2024-05-24 |
Family
ID=91101085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410031456.8A Pending CN118068973A (en) | 2024-01-09 | 2024-01-09 | Pressure sensing mechanism of touch control pen and electronic pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118068973A (en) |
-
2024
- 2024-01-09 CN CN202410031456.8A patent/CN118068973A/en active Pending
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