CN113721776A - Pressure detection device - Google Patents
Pressure detection device Download PDFInfo
- Publication number
- CN113721776A CN113721776A CN202111028181.5A CN202111028181A CN113721776A CN 113721776 A CN113721776 A CN 113721776A CN 202111028181 A CN202111028181 A CN 202111028181A CN 113721776 A CN113721776 A CN 113721776A
- Authority
- CN
- China
- Prior art keywords
- pressure
- magnetic pole
- sensitive
- elastic body
- coil
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000011896 sensitive detection Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000013459 approach Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
Abstract
The present invention relates to a pressure-sensitive detection device, including: the inner part of the shell is of a hollow structure and forms an accommodating part; a pressure-sensitive conducting part arranged at the front end of the accommodating part; the first magnetic pole is arranged in the accommodating part, one end of the first magnetic pole is contacted with the pressure-sensitive conducting part, and the other end of the first magnetic pole is contacted with the elastic body; the elastic body is arranged between the first magnetic pole and the second magnetic pole; the second magnetic pole is arranged in the accommodating part, and one end of the second magnetic pole is in contact with the elastic body; the coil is wound on the side wall of the second magnetic pole; the pressure-sensitive conducting part retracts towards the opening under the action of pressure, so that the elastic body is extruded and deformed, the first magnetic pole approaches to the second magnetic pole, and the inductance of the coil changes; and the processing circuit determines the pressure value between the pressure-sensitive conducting part and the writing medium according to the variable quantity of the inductance and outputs a detection control signal.
Description
Technical Field
The invention relates to the field of handwriting devices for operating touch screens, in particular to a pressure-sensitive detection device.
Background
In recent years, coordinate input devices have become increasingly important input devices for electronic devices such as personal computers. The coordinate input device includes a pen-like position indicator and a position detection device having an input interface. In the coordinate input apparatus, the input operation is a positioning operation, and a handwriting input operation or a hand-drawing input operation is performed by using a position indicator. Conventionally, as such a pen-type position indicator, a position indicator for an electromagnetic induction type position detection device is known. In this position indicator of the electromagnetic induction type, a resonance circuit is formed by connecting a resonance capacitor to a coil wound around a ferrite core. And the position indicator transmits a resonance signal obtained by the resonance circuit to the position detection device, thereby indicating a position to the position detection device.
Further, such a pen-type retainer has a function of detecting a pressure applied to a tip portion (pen tip) of the core and transmitting the pressure to a position detecting device. However, under the condition of a small pressure, the conventional pressure detection device cannot measure the pressure, so that the writing function of the pen point cannot be realized, namely, the phenomenon of 'no recognition'. In addition, the conventional pressure detection device may display the existence of pressure when no pressure is input, namely, a phenomenon of 'false recognition'. The phenomenon of 'no identification' and 'false identification' of the existing pressure detection device bring great inconvenience to users and influence the use effect of equipment.
Disclosure of Invention
The invention aims to provide a pressure-sensitive detection device aiming at the defects of the prior art, and the phenomena of 'false recognition' and 'false recognition' are avoided.
In order to achieve the above object, the present invention provides a pressure-sensitive detection device, including:
the inner part of the shell is of a hollow structure and forms a containing part, and the front end of the shell is provided with an opening;
a pressure-sensitive conductive part provided at the front end of the accommodating part and extending out of the opening;
the first magnetic pole is arranged in the accommodating part, one end of the first magnetic pole is in contact with the bottom end of the pressure-sensitive conducting part, and the other end of the first magnetic pole is in contact with the first surface of the elastic body; the side wall of the first magnetic pole is in contact with the inner wall of the shell and slides along the inner wall of the shell;
an elastic body disposed between the first magnetic pole and the second magnetic pole;
the second magnetic pole is arranged in the accommodating part, and one end of the second magnetic pole is in contact with the second surface of the elastic body; the second surface and the first surface are two surfaces which are parallel to each other;
the coil is wound on the side wall of the second magnetic pole;
the processing circuit is connected with the output end of the coil, and when the top end of the pressure-sensitive conducting part is contacted with a writing medium, the pressure-sensitive conducting part retracts towards the opening under the action of pressure, so that the elastic body is extruded and deformed, the first magnetic pole approaches to the second magnetic pole, and the inductance of the coil changes; and the processing circuit determines the pressure value between the pressure-sensitive conducting part and the writing medium according to the variable quantity of the inductance and outputs a detection control signal.
Preferably, the elastic body comprises a convex part and a body;
the convex part extends and retracts from the body.
Preferably, the projection is made of an insulating resin material.
Preferably, the processing circuit comprises a capacitor; the capacitor is connected with the coil to form a resonant circuit.
Preferably, the elastomer is composed of a silicone material.
Preferably, the electromagnetic pen comprises the pressure-sensitive detection device of any one of claims 1 to 5.
The pressure-sensitive detection device provided by the embodiment of the invention can avoid the phenomenon that writing function cannot be realized under the condition of micro pressure, namely 'unrecognized' phenomenon occurs, and the phenomenon that pressure exists when no pressure is input, namely 'mistaken recognition' phenomenon can be displayed. In addition, through set up removable spring between nib and variable capacitor for the nib hardness can be adjusted in a flexible way, has effectively improved and has write the feeling, has strengthened user experience.
Drawings
Fig. 1 is a schematic cross-sectional view of a pressure-sensing detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a casing of a pressure-sensing detecting device according to an embodiment of the present invention;
fig. 3 is a schematic view of an elastic body of the pressure-sensitive detection device according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Fig. 1 is a schematic view of a pressure-sensitive detection device provided in an embodiment of the present invention, fig. 2 is a schematic cross-sectional view of a housing of the pressure-sensitive detection device provided in an embodiment of the present invention, and fig. 3 is a schematic view of an elastic body of the pressure-sensitive detection device provided in an embodiment of the present invention; referring to fig. 1, 2 and 3, a pressure-sensitive detecting device according to an embodiment of the present invention includes: the magnetic field sensor comprises a shell 1, a pressure-sensitive conducting part 2, an accommodating part 3, a first magnetic pole 41, a second magnetic pole 42, an elastic body 5, a coil 6 and a processing circuit 7.
The housing 1 has a hollow structure to form a receiving portion 3, and the front end of the housing 1 has an opening 8. Preferably, the housing 1 has an elongated triangular prism barrel shape and is formed of a synthetic resin material to facilitate gripping by a user.
The pressure-sensitive conducting part 2 is provided at the front end of the accommodating part 3 and extends from the opening 8.
In a specific example, the cross section of the pressure-sensitive conducting part 2 is T-shaped, the T-shaped pressure-sensitive conducting part 2 is composed of an upper half cylinder 21 and a lower half cylinder 22 with the same center, the diameter of the upper half cylinder 21 is smaller than that of the lower half cylinder 22, and the diameter of the lower half cylinder 22 is larger than that of the opening 8;
the side surface of the upper half cylinder 21 and the side surface of the lower half cylinder 22 of the pressure-sensitive conducting part 2 are respectively contacted with the inner wall of the shell 1 and move along the inner wall of the shell 1. In a specific example, the pressure-sensitive conducting part 2 is designed as a pen tip of a stylus; the pressure-sensitive transmission part 2 is made of a synthetic resin material in view of abrasion resistance, in consideration of friction between the pen tip and a writing medium (not shown) over a long period of time.
A first magnetic pole 41 disposed in the accommodating portion 3, one end of which is in contact with the bottom end of the pressure-sensitive conductive portion 2, and the other end of which is in contact with the first surface 51 of the elastic body 5; the first magnetic pole 41 is preferably cylindrical, and the side wall thereof is in contact with the inner wall of the housing 1 and can slide along the inner wall of the housing 1.
An elastic body 5 provided between the first magnetic pole 41 and the second magnetic pole 42; the elastic body 5 has a first surface 51 and a second surface 52 parallel to each other. The elastic body 5 is preferably made of a silicone material.
In a specific example, the elastic body 5 includes a convex portion 53 and a body 54;
the convex parts 53 are respectively and symmetrically arranged on the first surface 51 and the second surface 52 of the elastic body 5, the section of the convex part 53 is in a cuboid shape, the lower part of the convex part 53 is connected with the extension spring 11, the extension spring 11 is fixed in the extension hole 10, and the convex part 53 and the extension spring 11 can integrally move up and down along the direction of the extension hole 10;
the central positions of the first surface 51 and the second surface 52 of the body 54 are respectively provided with a telescopic hole 10, and the telescopic hole 10 accommodating convex part 53 and the telescopic spring 11 are integrally deformed along the direction of the telescopic hole 10;
the ability of the convex portion 53 to resist an external force is smaller than the ability of the body 54 to resist the external force.
A second magnetic pole 42, which is arranged in the accommodating part 3 and one end of which is contacted with the second surface 52 of the elastic body 5; the second pole 42 is preferably cylindrical and has a coil 6 wound around its side.
The processing circuit 7 is arranged at the tail end of the shell 1 and is connected with the output end of the coil 6; the processing circuit 7 receives the inductance variation amount output by the coil 6 and outputs a detection control signal.
The pressure-sensitive detection device is applied to the touch pen and used for outputting a detection control signal for starting the touch pen to acquire and transmit signals.
In one embodiment of the present invention, as shown in fig. 1, a user holds the housing 1 of the stylus pen, applies a force to the pressure-sensitive conductive part 2, and writes on a writing medium (not shown).
When the pressure-sensitive conducting part 2 is not in use, the pressure-sensitive conducting part 2 extends out of the opening 8 from the inside of the casing 1 without external force, the first magnetic pole 41 is pressed by the convex part 53 of the elastic body 5 to move along the inner wall of the casing 1 to the direction of the pressure-sensitive conducting part 2 and is in contact with the lower half cylinder 22 of the pressure-sensitive conducting part 2, the pressure-sensitive conducting part 2 and the first magnetic pole 41 and the second magnetic pole 42 are isolated by the elastic body 5 and kept in a separated state without external force, and because the distance between the first magnetic pole 41 and the second magnetic pole 42 is not changed, the inductance of the coil 6 wound on the second magnetic pole 42 is not changed, the corresponding processing circuit 7 cannot obtain corresponding data, and thus no pen pressure is generated and no detection is performed.
When the pen is in use, the pressure-sensitive conducting part 2 retracts towards the opening 8 and presses the first magnetic pole 41 under the action of external force, the first magnetic pole 41 moves towards the elastic body 5 along the inner wall of the shell 1 under the action of external force, and presses the convex part 53 of the elastic body 5 and the extension spring 11 to deform the extension spring 11, the deformation of the extension spring 11 reaches a critical point along with the action of external force, the external force is conducted to the body 54 of the elastic body 5 to deform the body 54, the deformation of the body 54 reaches the critical point along with the action of external force, the external force presses the second magnetic pole 42, the first magnetic pole 41 approaches the second magnetic pole 42 in the whole deformation process along with the deformation of the elastic body 5, the distance between the first magnetic pole 41 and the second magnetic pole 42 changes, the inductance of the coil 6 wound on the second magnetic pole 42 changes, the processing circuit 7 is connected with the output end of the coil 6, and the processing circuit 7 obtains a corresponding pen pressure value according to the inductance change of the coil 6, thereby achieving the purpose of detecting the pen pressure.
According to the pressure detection device provided by the embodiment of the invention, by arranging the structure of the elastic body, the pen pressure detection process is further simplified, the accuracy of the detection result is improved, the probability of 'no identification' and 'false identification' in the detection process is reduced, and the writing hand feeling is improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A pressure-sensitive detection device, characterized by comprising:
the inner part of the shell is of a hollow structure and forms a containing part, and the front end of the shell is provided with an opening;
a pressure-sensitive conductive part provided at the front end of the accommodating part and extending out of the opening;
the first magnetic pole is arranged in the accommodating part, one end of the first magnetic pole is in contact with the bottom end of the pressure-sensitive conducting part, and the other end of the first magnetic pole is in contact with the first surface of the elastic body; the side wall of the first magnetic pole is in contact with the inner wall of the shell and slides along the inner wall of the shell;
an elastic body disposed between the first magnetic pole and the second magnetic pole;
the second magnetic pole is arranged in the accommodating part, and one end of the second magnetic pole is in contact with the second surface of the elastic body; the second surface and the first surface are two surfaces which are parallel to each other;
the coil is wound on the side wall of the second magnetic pole;
the processing circuit is connected with the output end of the coil, and when the top end of the pressure-sensitive conducting part is contacted with a writing medium, the pressure-sensitive conducting part retracts towards the opening under the action of pressure, so that the elastic body is extruded and deformed, the first magnetic pole approaches to the second magnetic pole, and the inductance of the coil changes; and the processing circuit determines the pressure value between the pressure-sensitive conducting part and the writing medium according to the variable quantity of the inductance and outputs a detection control signal.
2. The pressure sensing device of claim 1, wherein the resilient body comprises a protrusion and a body;
the convex part extends and retracts from the body.
3. The pressure-sensitive detection device according to claim 2, wherein the convex portion is formed of an insulating resin material.
4. The pressure sensing device of claim 1, wherein the processing circuit comprises a capacitor; the capacitor is connected with the coil to form a resonant circuit.
5. The pressure sensing device of claim 1, wherein the elastomer is comprised of a silicone material.
6. An electromagnetic pen, characterized in that it comprises a pressure-sensitive detection device according to any one of the preceding claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028181.5A CN113721776A (en) | 2021-09-02 | 2021-09-02 | Pressure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028181.5A CN113721776A (en) | 2021-09-02 | 2021-09-02 | Pressure detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113721776A true CN113721776A (en) | 2021-11-30 |
Family
ID=78681193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111028181.5A Pending CN113721776A (en) | 2021-09-02 | 2021-09-02 | Pressure detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113721776A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309472A (en) * | 2012-03-15 | 2013-09-18 | 株式会社和冠 | Pen type coordinate indicator |
| CN203982305U (en) * | 2013-08-03 | 2014-12-03 | 株式会社和冠 | Pen is pressed detection module and position indicator |
| CN205594600U (en) * | 2016-04-22 | 2016-09-21 | 立迈科技股份有限公司 | Active pressure electric capacity touch -control pen |
| US20180101272A1 (en) * | 2016-03-15 | 2018-04-12 | Guangdong Zonghua Touch Control Technology Co. Ltd . | Variable-capacitance pressure sensor and real-handwriting stylus |
| CN109445641A (en) * | 2018-12-19 | 2019-03-08 | 四川仪岛科技有限公司 | A kind of writing position detector |
-
2021
- 2021-09-02 CN CN202111028181.5A patent/CN113721776A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309472A (en) * | 2012-03-15 | 2013-09-18 | 株式会社和冠 | Pen type coordinate indicator |
| US20130241897A1 (en) * | 2012-03-15 | 2013-09-19 | Wacom Co., Ltd. | Pen type coordinate indicator |
| CN203982305U (en) * | 2013-08-03 | 2014-12-03 | 株式会社和冠 | Pen is pressed detection module and position indicator |
| US20180101272A1 (en) * | 2016-03-15 | 2018-04-12 | Guangdong Zonghua Touch Control Technology Co. Ltd . | Variable-capacitance pressure sensor and real-handwriting stylus |
| CN205594600U (en) * | 2016-04-22 | 2016-09-21 | 立迈科技股份有限公司 | Active pressure electric capacity touch -control pen |
| CN109445641A (en) * | 2018-12-19 | 2019-03-08 | 四川仪岛科技有限公司 | A kind of writing position detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4872111B2 (en) | Position indicator | |
| US9158394B2 (en) | Stylus for use with capacitive touch panel | |
| JP2767098B2 (en) | Position indicating unit and stylus pen | |
| US5914708A (en) | Computer input stylus method and apparatus | |
| CN107521259B (en) | Writing tool and electronic pen body part | |
| US10551943B2 (en) | Micro touch pen structure including pen core with stop portion that moves together with magnetic unit when pressure is applied to movable portion of pen core | |
| US6727439B2 (en) | Pressure sensitive pen | |
| US20090076770A1 (en) | Position indicator, variable capacitor, position input device and computer system | |
| KR20160064719A (en) | Pen input device, method for correction input coordinate thereof and electronic device for suppoting the same | |
| CN104461078A (en) | Magnetic capacity type pointer device | |
| CN104571848A (en) | Touch device and system capable of judging function switching and function switching control method thereof | |
| CN109901729B (en) | Index device | |
| CN113721776A (en) | Pressure detection device | |
| CN110825247B (en) | Pressure sensing position indicating device | |
| CN111090347A (en) | Force-sensitive handwriting device based on magnetic elastomer | |
| US11614808B2 (en) | Electronic pen | |
| US11906384B2 (en) | Pressure detection device with improved load and response accuracy | |
| KR101632388B1 (en) | Stylus | |
| US20170060277A1 (en) | Magnetic switch assembly and stylus having the same | |
| CN217213659U (en) | Touch control pen and electronic equipment | |
| TWM474187U (en) | Stylus | |
| US20210223874A1 (en) | Touch pen | |
| CN214311676U (en) | Pen head and electronic pen | |
| CN106227372B (en) | Electromagnetic pressure sensing pen pressure sensing device of true handwriting intelligent terminal | |
| CN108345394B (en) | Input device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 1002, floor 10, block B, No. 18, Zhongguancun Street, Haidian District, Beijing 100044 Applicant after: Beijing Biyun shuchuang Technology Co.,Ltd. Address before: Room 1002, floor 10, block B, No. 18, Zhongguancun Street, Haidian District, Beijing 100044 Applicant before: Beijing yundie Zhixue Technology Co.,Ltd. |
|
| CB02 | Change of applicant information |