CN211554905U - Active capacitive screen pressure induction type touch pen and detachable induction pen point - Google Patents

Abstract

The utility model relates to a touch-control pen field specifically is an active electric capacity screen forced induction formula touch-control pen and detachable response nib, active electric capacity screen forced induction formula touch-control pen comprises response nib, connection mother seat, pressure sensing subassembly, battery and master control circuit board, the response nib is connected for dismantling between the mother seat with being connected, be equipped with three independent nib electrode in the response nib, be equipped with on the connection mother seat with the three independent mother seat electrode that nib electrode one-to-one is connected, mother seat electrode and master control circuit board electric connection. The utility model has the advantages of detachable pen head, reliable performance, low production and use cost, etc.

Description

Active capacitive screen pressure induction type touch pen and detachable induction pen point

Technical Field

The utility model relates to a touch-control pen, more specifically say, relate to an active electric capacity screen forced induction formula touch-control pen and detachable response nib.

Background

With the increasingly wide application of portable electronic devices such as touch screens, the man-machine communication mode of active touch pens matched with the touch screens is more popular with users. The active touch pen in the market is connected with an electrode of a pen point through an electronic circuit board (PCBA), and a signal is transmitted to the PCBA of the touch pen for signal processing through the contact of the electrode and the touch screen and then fed back to the touch screen through the electrode so as to achieve the writing and drawing functions. The nib electrode of current product is mostly the mode of metal needle, and the structural style of nib divide into the mode of single electrode nib mode and three electrode combination nib again: the pen point of the single electrode mode directly receives coordinate information transmitted by the touch screen through a metal electrode, the coordinate information is received by the PCBA and processed by the MCU chip, and then a signal with specific frequency is transmitted by the electrode to be fed back to the touch screen to control the touch screen. The pen point with three electrodes is characterized in that a copper needle is made into an electrode which is a 1 st electrode (the top of the copper needle is polished into an arc shape) and is embedded in a conductive copper tube, the copper tube is used as a 2 nd electrode, a conductive shell of a touch pen is used as a 3 rd electrode, the 1 st electrode is a signal input electrode and is directly welded on a PCBA in the pen tube; the second electrode is a signal shielding electrode, and is connected to a grounding wire of a PCBA (printed circuit board assembly), the 3 rd electrode is a signal emitting electrode (a conical shell at the front end of a pen tube), and then is connected to the signal emitting electrode on the PCBA through an internal spring, the specific method can refer to the content described in patent No. 201721432535.1, but in practical application, due to the processing and structural problems of the pen point electrode, a third electrode of a product in the market adopts a pen shell, so that the assembly and debugging are complex, the yield of a produced finished product is low, a metal copper needle is used as a touch screen of a direct contact electronic product, scratches and scratches of the touch screen of an electronic device of a user are scraped, loss is also caused for the user, and the user can not conveniently replace. Therefore, the company explains the product of the 3 rd generation in the patent ZL 201822191522.0, and the nano conductive pen point is pushed out, so that the problem of drawing marks on the touch screen can be effectively solved, and the problem of tedious production and debugging is solved.

The existing active capacitive screen touch pen with pressure sensing generally adopts a pressure sensor which is a pressure-capacitance type sensor, specifically, the pressure sensor (pressure-capacitance type) is welded on a Flexible Printed Circuit (FPC), the FPC is welded on a mainboard, and pressure on a pen point is applied to the pressure sensor through a touch pen transmission structural part so as to achieve the effect of writing and drawing original handwriting. This mode is because the pressure sensor who adopts is the pressure-capacitance formula, and inside major component is the pressure variable capacitance of ceramic multilayer, presses the scope of changing little (the product pressure that adopts this scheme now feels the precision and accomplishes 256 levels or 512 levels mostly), if need improve the scope, just need increase the variable capacitance varactor number of piles, and the volume will also increase like this, because the reason of technology, material cost then is the increase of fold, will change the pressure-capacitance formula pressure sensor with higher cost price if will make the product that the pressure is felt several levels height.

To the not enough of above prior art, this company develops novel active electric capacity screen touch-control pen, combines together novel detachable response nib and novel forced induction structure, can satisfy all kinds of demanders' user experience completely.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an active electric capacity screen forced induction formula touch-control pen and detachable response nib are provided, can solve and adopt pressure appearance formula pressure sensor and the high problem of material cost who causes among the prior art, can solve the not removable problem of current product nib simultaneously.

In order to solve the technical problem, the utility model discloses a following technical scheme:

active electric capacity screen forced induction formula touch-control pen comprises response nib, connection mother seat, pressure sensing subassembly, battery and main control circuit board, the response nib with be connected and be connected for dismantling between the mother seat, be equipped with three independent nib electrode in the response nib, be equipped with on the connection mother seat with the three independent mother seat electrode that nib electrode one-to-one is connected, mother seat electrode and main control circuit board electric connection.

Furthermore, the pressure sensing assembly comprises a magnetic core, a ferrule, an inductance coil, a shielding case and a flexible circuit board, wherein the magnetic core, the ferrule and the inductance coil are sleeved in the shielding case, and a lead of the inductance coil is welded on the flexible circuit board.

Furthermore, an LC frequency oscillating circuit is arranged on the main control circuit board, and the flexible circuit board is connected with the LC frequency oscillating circuit.

Preferably, the induction pen point is in threaded connection with the connecting female base.

Furthermore, the connection female socket is composed of a female socket body, a first female socket electrode, a second female socket electrode, a third female socket electrode and a spring electrode, wherein the first female socket electrode, the second female socket electrode, the third female socket electrode and the spring electrode are embedded in the female socket body, the first female socket electrode and the second female socket electrode are respectively connected with the main control circuit board, and the third female socket electrode is connected to the main control circuit board through the spring electrode.

Furthermore, the induction pen point is sequentially provided with a first pen point electrode, a second pen point electrode, a third pen point electrode and an outer tube from inside to outside, insulating tubes for locking the relative positions of the electrodes are respectively arranged between the first pen point electrode and the second pen point electrode and between the second pen point electrode and the third pen point electrode, the top end of the first pen point electrode is provided with a conductive pen point, and the tail parts of the second pen point electrode and the third pen point electrode are respectively provided with threads.

Furthermore, the total length of the first pen point electrode is greater than that of the second pen point electrode, the total length of the second pen point electrode is greater than that of the third pen point electrode, and the top of the first pen point electrode, the second pen point electrode and the third pen point electrode is in a tower shape after being assembled.

The utility model provides a detachable response nib, includes first nib electrode, second nib electrode, third nib electrode, the outer tube that from interior to exterior set gradually, be equipped with the insulating tube of locking electrode relative position between first nib electrode and the second nib electrode, between second nib electrode and the third nib electrode respectively, the top of first nib electrode has electrically conductive nib, the afterbody of second nib electrode and third nib electrode is equipped with the screw thread respectively.

Further, the total length of the first pen point electrode 4 is greater than that of the second pen point electrode 8, the total length of the second pen point electrode 8 is greater than that of the third pen point electrode 11, and the tops of the first pen point electrode 4, the second pen point electrode 8 and the third pen point electrode 11 are in a tower shape after being assembled.

Preferably, the pen tip 5 is made of nano conductive plastic.

The utility model discloses owing to adopted above-mentioned structure, following beneficial effect has:

1. the utility model discloses a pressure sensor, the inductance value through changing inductance coils comes the induction pressure value, can be according to experience person's requirement, the wide range change the sensitivity of pressure sensitivity level under the inherent characteristic of sensor that does not change, under the condition that does not change sensor hardware, only to the electric capacity change in the way that LC vibrates, just accomplish the production of going to set for the product grade to 256 grades 1024 levels 4096 levels of pressure sensitivity stylus, thereby the realization is gone to accomplish the upgrading of product with low-cost method.

2. The utility model discloses a female seat of connection realizes dismantling of nib and active electric capacity screen touch-control pen and is connected, makes the two can separate completely, and the nib can be changed to the person of facilitating the use, satisfies all kinds of consumers 'user experience, like changing the nib according to work needs, only need screw off the nib, change with the nib of model can, need not to change whole touch-control pen, save consumers' use cost.

3. The utility model discloses a nib passes through the coexistence of nested mode realization a plurality of electrodes, and locking relative position and mutual noninterference's three electrode nib subassembly through the injection moulding processing technology, makes it become a whole nib, is equipped with the screw thread on two electrode conductors of afterbody of nib, and convenient and the touch-control pen be connected and dismantle the change, guarantee the signal independent transmission of every electrode simultaneously again on the touch-sensitive screen, ensure the stable output and the receipt of multichannel signal to increase the touch-control precision, the reduction is write and is postponed.

The features and advantages of the present invention will become more apparent upon reading the detailed description of the embodiments of the invention in conjunction with the accompanying drawings.

Drawings

Fig. 1 is an external view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is a schematic structural diagram of the pressure sensing assembly of the present invention;

fig. 4 is an exploded schematic view of the pressure sensing assembly of the present invention;

FIG. 5 is a schematic structural view of the female connection seat of the present invention;

FIG. 6 is an exploded view of the female connection block of the present invention;

FIG. 7 is a schematic view of the structure of the inductive pen head of the present invention;

FIG. 8 is a schematic cross-sectional view of an inductive pen tip according to the present invention;

FIG. 9 is an exploded view of the inductive pen tip of the present invention;

fig. 10 is an electrical schematic of the present invention.

In the figure: 1. an induction pen point; 2. connecting the female seat; 3. a pressure sensing assembly; 4. a first nib electrode; 5. sensing the pen point; 6. a first insulating sleeve; 7. a first insulating sheet ferrule; 8. a second nib electrode; 9. a second insulating sheet ferrule; 10. a second insulating sleeve; 11. a third tip electrode; 12. an outer tube; 13. a first female socket electrode; 14. a second female socket electrode; 15. a female seat body; 16. a third female socket electrode; 17. a spring electrode; 18. a magnetic core; 19. a silica gel ferrule; 20. an inductor coil; 21. a shield case; 22. a flexible circuit board; 23. repairing the wall of the PFC circuit board; 24. conical pen tube plastic; 25. an aluminum pen tube; 26. a power switch; 27. a button pen clip; 28. the pen clip plastic cone; 29. a decorative ring; 30. a pen cap; 31. a battery; 32. a battery connecting seat; 33. fixing plastic cement; 34. a main control circuit board; 35. a plastic part; 36. a first fixing member; 37. a second fixing member; 38. the second electrode is connected with the lead; 39. the third electrode is connected with the lead.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, but it should be understood that the scope of the present invention is not limited thereto.

Example 1

As shown in fig. 1-2, the active capacitive screen pressure sensing stylus of the present invention includes an external sensing pen point 1, a conical pen tube plastic 24, an aluminum pen tube 25, a power switch button 26, a pen clip 27, a pen clip plastic cone 28, a decorative ring 29, and a pen cap 30, and includes a female connection base 2, a pressure sensing assembly 3, a battery 31, a battery connection base 32, a power switch button fixing plastic 33, a main control circuit board 34, a plastic part 35 for fixing the main control circuit board 34, a first fixing part 36 for fixing the female connection base 2, a second fixing part 37 for fixing the sensing assembly, a second electrode connection wire 38, and a third electrode connection wire 39, wherein the battery 31 can be a rechargeable battery or a dry battery.

As shown in fig. 3-4, the pressure sensor of the present invention detects pressure by changing the inductance of the inductance coil 20, so that the pressure sensor is simple to manufacture, high in sensitivity and large in pressure-sensitive variation range. In this case, the pressure sensing component 3 includes: the assembly method of the cylindrical through hole shielding case 21, the T-shaped magnetic core 18, the O-shaped silica gel ferrule 19, the multilayer hollow inductance coil 20, the PFC flexible circuit board 22 and the PFC circuit board supplementary wall 23 comprises the following steps: welding two leads of an inductance coil 20 on a flexible circuit board 22 with a connecting wire, in order to ensure the hardness of the circuit board, arranging a PI supplementary wall 23 at the bottom of the flexible circuit board 22, sleeving a silica gel O-shaped ring 19 into a T-shaped magnetic core 18, then arranging the T-shaped magnetic core into an assembly consisting of the inductance coil 20, the flexible circuit board 22 and the PI supplementary wall 23, and sleeving a cylindrical through hole shielding cover 21, thus forming a pressure sensor with changeable inductance; the lead of the flexible circuit board 22 on the assembled pressure sensor 3 is welded on the main control circuit board 34, an LC frequency oscillating circuit is arranged on the main control circuit board 34, and the handwriting force of the pen point is propped against the sensing assembly through a structural part, so that the inductance value of the hollow inductance coil is changed, and the change is converted into the frequency change of the LC oscillating circuit. Since the reference frequency of the oscillator circuit can be set, in the LC frequency oscillator circuit, if the value of the external capacitor is large, and if the reference frequency is low, and if the inductance value is changed in the same range, the output frequency change range is small, and the sensitivity to the voltage sense is low, otherwise, if the external capacitor of the oscillator circuit is reduced, the reference frequency at this time becomes large, but if the inductance value is changed in the same range, the output frequency change range is large, and the sensitivity to the voltage sense is high. Therefore, the utility model discloses can be according to experience person's requirement, the wide range does not change the sensitivity of pressure sensing level under the inherent characteristic of sensor, can be under the condition that does not change sensor hardware, only to the electric capacity change in the LC frequency oscillating circuit, just accomplish the production of going to set for the product grade to 256 grades of 1024 grades of 4096 grades of pressure sensing touch-control pens to remove the upgrading of accomplishing the product with low-cost method.

As shown in fig. 5-6, the utility model discloses a connect female seat 2 by the female seat body 15 of plastic screw thread tooth, and inlay in the first female seat electrode 13 of female seat body 15, the female seat electrode 14 of second, the female seat electrode 16 of third, spring electrode 17 constitutes, first female seat electrode 13, the female seat electrode 14 of second is connected with main control circuit board 34 respectively, the female seat electrode 16 of third is bullet needle formula metallic interconnect, be connected to main control circuit board 34 through spring electrode 17, through the setting of connecting female seat 2, can make nib and active electric capacity screen touch-control pen realize the complete separation, the removable nib of user, satisfy all kinds of demanders' user experience.

As shown in fig. 7-9, the sensing pen head 1 of the present invention comprises: the first pen point electrode 4 is a conductive copper needle with the diameter of 0.7 mm; the induction pen point 5 is a nano conductive wear-resistant plastic pen point; the diameter of an inner hole of the first insulating sleeve 6 is 0.7mm, and the outer diameter of the first insulating sleeve is 0.9 mm; the first insulating sheet ferrule 7, the inner hole is 0.7mm, and the outer diameter is 1.3 mm; the second pen point electrode 8 is a metal copper pipe with threads, the diameter of an inner hole is 0.95mm, and the outer diameter is 1.35 mm; the diameter of an inner hole of the second insulating sheet ferrule 9 is 1.4mm, and the outer diameter of the second insulating sheet ferrule is 2.4 mm; the diameter of an inner hole of the second insulating sleeve 10 is 1.4mm, and the outer diameter of the second insulating sleeve is 1.8 mm; the third pen point electrode 11 is a threaded metal tower-shaped copper pipe, the diameter of an inner hole is 1.9mm, and the outer diameter is 2.3 mm; the outer tube 12 is of encapsulated plastic. The assembly process is as follows: the first insulating sheet ferrule 7 is sleeved into the bottom end from the top end of the first pen point electrode 4, then the first insulating sleeve 6 is sleeved into the first pen point electrode 4, and then a semi-finished product formed by integrating the first pen point electrode 4, the first insulating sleeve 6 and the insulating sheet ferrule 7 is sleeved into the second pen point electrode 8 with a certain length, so that the first pen point electrode 4 and the second pen point electrode 8 form two completely insulated electrodes. The total length of the first pen point electrode 4 is larger than that of the second pen point electrode 8, and the copper needle of the first pen point electrode 4 is exposed out of the copper tube of the second pen point electrode 8 for a certain length after assembly. And sleeving a second insulating sheet ferrule 9 into a semi-finished part made of a second pen point electrode 8, then putting a part of a second insulating sleeve 10 into a plastic mould cavity, adding a nano conductive material into the plastic, mixing to form nano conductive plastic, and injecting the conductive plastic on the top end of the metal needle of the first pen point electrode 4 by using an in-mould injection method to form the wear-resistant induction pen point 5. And sleeving the injection-molded semi-finished product on a third pen point electrode 11 to form a tower shape, thereby forming 3 electrodes which are not interfered with each other. And placing the prepared semi-finished product into a plastic mold again for injection molding, and assembling the induction pen point 1.

The utility model discloses an respond to written advantage is through the coexistence of nested mode realization a plurality of electrodes, locking relative position and mutual noninterference have 3 electrode nib subassemblies, then through the injection moulding process, make it become a whole nib, the afterbody of nib has threaded screw tooth on two electrode conductors, convenient and the touch-control pen be connected with dismantle the change, guarantee again simultaneously that the signal of every electrode independently transmits the touch-sensitive screen on, ensure the stable output and the receipt of multichannel signal, with the increase touch-control precision, reduce and write the delay. If the pen point is replaced according to the working requirement, the pen point is only required to be unscrewed, and the pen point with the same model can be replaced without replacing the whole touch pen, so that the use cost of a demander is saved. The utility model discloses in, current hardware processing makes, and the machining precision of five metals is 0.01mm, because the diameter of every part is all smaller, so the size length of this kind nib is 16mm, and the diameter is 3mm, and the outward appearance is small and exquisite to effectively reduction in production cost.

As shown in fig. 10, the electrical principle of the present invention is as follows: the battery 31 supplies power to the main control circuit board 34 through the battery connecting seat 32, signals of three electrodes of the sensing pen point 1 are connected to the main control circuit board 34 through three electrodes (a first female seat electrode 13, a second female seat electrode 14 and a third female seat electrode 16) of the female seat 2, then the signals are connected to the main control circuit board 34 through the spring electrode 17, the second female seat electrode 38 and the third electrode connecting wire 39, the spring electrode 17 is a signal receiving end, the second female seat electrode 14 is connected to the grounding electrode of the main control circuit board 34 through the second electrode connecting wire 38, the first female seat electrode 13 is connected to the transmitting end of the main control circuit board 34 through the third electrode connecting wire 39, and the second electrode connecting wire 38 and the third electrode connecting wire 39 are shielded coaxial cables, so that the signal negative interference between the signal receiving electrode and the transmitting electrode can be guaranteed, and the signal delay of the touch pen writing is reduced. Because the metal lower end of the third female socket electrode 16 has a thimble, which is connected to the pressure sensing component 3, the flexible circuit board 22 on the pressure sensing component 3 is provided with a welding contact, and is welded on the main control circuit board 34 through the contact. When a user writes and draws, signals of the touch pen and the touch screen are transmitted to a computer chip (MCU) on the main control circuit board 34 for processing through the first pen point electrode 4, because the pressure of the touch pen and the touch screen is different when different users write and draw, or the force for reflecting a real picture is different when a part of the drawing is drawn, the force is transmitted to a pressure sensing component through an ejector pin of the third mother seat electrode 16, the pressure sensing component 3 is converted into the change of an inductance value and is transmitted to an LC frequency resonance circuit on the main control circuit board, a vibration circuit inputs the resonance frequency to the computer chip (MCU) on the control mainboard for processing, and simultaneously, the signals of the touch screen transmitted by the first pen point electrode 4 are operated, a control signal is output to the touch screen through the third pen point electrode 11, the real handwriting is truly restored, the expression of the signals on the touch screen is that the force is small, the line of the written stroke is small, and if the force is large, the line of the written stroke becomes thick.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various changes and modifications within the scope of the appended claims, and the scope of the present invention should not be limited to the described scope of the claims.

Claims (10)

1. Active capacitive screen forced induction formula touch-control pen, its characterized in that: constitute by response nib (1), female seat of connection (2), pressure sensing subassembly (3), battery (31) and main control circuit board (34), be connected for dismantling between response nib (1) and the female seat of connection (2), be equipped with three independent nib electrode in the response nib (1), be equipped with on the female seat of connection (2) with the three independent female seat electrode that nib electrode one-to-one is connected, female seat electrode and main control circuit board (34) electric connection.

2. The active capacitive screen pressure sensitive stylus of claim 1, wherein: the pressure sensing assembly (3) is composed of a magnetic core (18), a ferrule (19), an inductance coil (20), a shielding case (21) and a flexible circuit board (22), the magnetic core (18), the ferrule (19) and the inductance coil (20) are sleeved in the shielding case (21), and a lead of the inductance coil (20) is welded on the flexible circuit board (22).

3. The active capacitive screen pressure sensitive stylus of claim 2, wherein: the main control circuit board (34) is provided with an LC frequency oscillating circuit, and the flexible circuit board (22) is connected with the LC frequency oscillating circuit.

4. The active capacitive screen pressure sensitive stylus of claim 1, wherein: the induction pen point (1) is in threaded connection with the connecting female base (2).

5. The active capacitive screen pressure sensitive stylus of claim 1, wherein: the female seat of connection (2) by female seat body (15) and inlay first female seat electrode (13), the female seat electrode of second (14), the female seat electrode of third (16), spring electrode (17) in female seat body (15) and constitute, first female seat electrode (13), the female seat electrode of second (14) are connected with main control circuit board (34) respectively, the female seat electrode of third (16) are connected to main control circuit board (34) through spring electrode (17).

6. An active capacitive screen pressure sensitive stylus according to any one of claims 1 to 5, wherein: the induction pen point is sequentially provided with a first pen point electrode (4), a second pen point electrode (8), a third pen point electrode (11) and an outer tube (12) from inside to outside, insulating tubes for locking the relative positions of the electrodes are respectively arranged between the first pen point electrode (4) and the second pen point electrode (8) and between the second pen point electrode (8) and the third pen point electrode (11), the top end of the first pen point electrode (4) is provided with a conductive pen point (5), and the tail parts of the second pen point electrode (8) and the third pen point electrode (11) are respectively provided with threads.

7. The active capacitive screen pressure sensitive stylus of claim 6, wherein: the total length of the first pen point electrode (4) is larger than that of the second pen point electrode (8), the total length of the second pen point electrode (8) is larger than that of the third pen point electrode (11), and the tops of the first pen point electrode (4), the second pen point electrode (8) and the third pen point electrode (11) are tower-shaped after being assembled.

8. The utility model provides a detachable response nib which characterized in that: including first nib electrode (4), second nib electrode (8), third nib electrode (11), outer tube (12) that from interior to exterior set gradually, be equipped with the insulating tube of locking electrode relative position between first nib electrode (4) and second nib electrode (8), between second nib electrode (8) and third nib electrode (11) respectively, the top of first nib electrode (4) has electrically conductive nib (5), the afterbody of second nib electrode (8) and third nib electrode (11) is equipped with the screw thread respectively.

9. The detachable induction pen point of claim 8, characterized in that: the total length of the first pen point electrode (4) is larger than that of the second pen point electrode (8), the total length of the second pen point electrode (8) is larger than that of the third pen point electrode (11), and the tops of the first pen point electrode (4), the second pen point electrode (8) and the third pen point electrode (11) are tower-shaped after being assembled.

10. The detachable induction pen point of claim 8 or 9, characterized in that: the pen point (5) is made of nano conductive plastics.

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