CN217238768U - Pen point assembly for capacitance pen and capacitance pen - Google Patents

Abstract

The application provides a nib subassembly and electric capacity pen for electric capacity pen, wherein, the nib subassembly includes the nib dustcoat, the contact discernment electrode, second electrode and shielding electrode, wherein the contact discernment electrode includes split type first electrode that sets up and leads the union piece, and the front end of first electrode is fixed in the nib dustcoat, the shielding electrode encircles and sets up between the internal face of leading the outer wall of union piece and second electrode, and make through first insulating part and second insulating part lead the union piece, the electrode subassembly of an integration is constituteed to second electrode and shielding electrode. The problem of the signal interference between the inside union piece of leading of nib subassembly and the second electrode is solved, form the electrode subassembly of integration between a plurality of electrodes simultaneously, promoted the structural strength of a plurality of electrodes, promoted the stability and the fastness of nib subassembly.

Description

Pen point assembly for capacitance pen and capacitance pen

Technical Field

The application relates to the technical field of active capacitance pens, in particular to a pen point assembly for a capacitance pen and the capacitance pen.

Background

An active capacitive stylus is an input device that interacts with an electronic device with a touch screen. The active capacitance pen transmits an electric signal to the touch screen through the electrode at the pen point position, and the touch screen identifies the contact point position of the pen point on the touch screen by receiving the pen point signal and makes instant feedback at the feedback position.

However, when the active capacitive stylus interacts with the touch screen, the active capacitive stylus and the touch screen form different angles. Therefore, in order to enhance the interaction experience of the user, the touch screen not only needs to identify the touch point position of the capacitive pen, but also needs to identify the angle formed by the capacitive pen at the touch point position and the touch screen, so that the feedback position is corrected through the identified angle, and the interaction experience of the user during use is improved.

In order to guarantee that the touch screen can accurate discernment electric capacity pen nib in the angle that contact position and touch screen formed, can set up a plurality of positioning electrodes inside the nib at the electric capacity pen, make the touch screen can receive the electromagnetic wave signal that sends of a plurality of positioning electrodes, and can obtain the contact position of electric capacity pen and the angle between electric capacity pen and the touch screen through the algorithm, make the touch screen make instant feedback according to the contact position and the angle of electric capacity pen at feedback position, promote mutual experience.

However, with the increase of the electrodes, the electromagnetic wave signals emitted between different electrodes are easily interfered, and the recognition accuracy of the touch screen on the position and the angle of the touch point of the pen point is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an aim at solves among the prior art, the problem of signal interference appears easily between the different electrodes that the electric capacity pen nib of multi-electrode structure exists. Therefore, this application provides a nib subassembly and electric capacity pen for electric capacity pen sets up shielding electrode between the different electrodes of nib subassembly to adopt integrated into one piece's technology to make a plurality of electrodes constitute a whole, and then, solved the problem of signal interference between the inside a plurality of electrodes of nib subassembly, strengthened the structural strength between a plurality of electrodes simultaneously, promoted the use experience of electric capacity pen nib subassembly.

The embodiment of the application provides a nib subassembly for electric capacity pen, including the nib dustcoat, the front end of nib dustcoat forms the nib.

The contact point identification electrode comprises a first electrode and a guide connecting piece, wherein the front end of the first electrode is fixed on the inner wall surface of the pen point, and the rear end of the first electrode is in contact with and electrically connected with the front end of the guide connecting piece.

And a second electrode disposed around an outer peripheral side of the lead connector.

And the shielding electrode is arranged between the outer wall surface of the guide connecting piece and the inner wall surface of the second electrode in a surrounding mode. The first insulating part and the second insulating part are respectively formed by filling insulating materials between the inner wall surface of the shielding electrode and the outer wall surface of the conducting and connecting piece and between the outer wall surface of the shielding electrode and the inner wall surface of the second electrode, so that the conducting and connecting piece, the first insulating part, the shielding electrode, the second insulating part and the second electrode form an integrated electrode assembly; and the first insulating part is used for electrically isolating the shielding electrode from the conducting connection piece, and the second insulating part is used for electrically isolating the shielding electrode from the second electrode. The front end of the electrode assembly is arranged on the inner side of the pen point outer cover, and the rear ends of the guide connecting piece, the shielding electrode and the second electrode are electrically connected with the main board assembly.

The utility model provides a scheme adopts split type contact discernment electrode for the first electrode of contact discernment electrode is fixed in the internal face of nib, thereby is using the in-process of nib subassembly, and the first electrode can be dismantled with the nib dustcoat is synchronous and change. In addition, a shielding electrode is arranged between the guide connecting piece of the contact identification electrode and the second electrode, so that the problem of signal interference caused by the guide connecting piece to the second electrode is solved. Meanwhile, a first insulating part and a second insulating part are formed among the conducting connecting piece, the shielding electrode and the second electrode by filling insulating materials, so that the conducting connecting piece, the first insulating part, the shielding electrode, the second insulating part and the second electrode form an integrated electrode assembly. Therefore, the electrode assembly has higher structural strength, different electrodes cannot be mutually staggered and deviated, and the electrode assembly has good structural stability and structural strength.

In some embodiments, the first electrode is an integral component and comprises a sensing part and a connecting part, the sensing part forms the front end of the first electrode, the connecting part forms the rear end of the first electrode, the sensing part is arranged in a spherical shape on the surface attached to the inner wall surface of the pen point, and the projection of the connecting part along the axial direction of the pen point assembly is located in the boundary of the projection of the sensing part along the axial direction of the pen point assembly.

In some embodiments, the sensing portion is disposed in a hemispherical shape, the connecting portion is disposed in a thin rod shape, and a front end of the connecting portion is fixedly connected to a central position of a rear end face of the sensing portion. Make induction part can send even electromagnetic wave signal towards the sphere direction for the electric capacity pen carries out interactive in-process with the electronic equipment who takes the touch-control screen, and the touch-control screen can discern the contact position more accurately, is favorable to reducing the interference of the electromagnetic wave signal that connecting portion sent to the electromagnetic wave signal that induction part sent simultaneously, improves the precision of touch-control screen to nib contact position discernment. In some embodiments, the front end of the shield electrode protrudes beyond the front end of the second electrode in the direction of the axis of the nib assembly. The front end of the guide piece extends out of the front end of the shielding electrode or is flush with the front end of the shielding electrode. The interference of the leading connector extending out of the front end of the shielding electrode on the electric signal sent by the front end of the second electrode is reduced, and the shielding effect of the shielding electrode is enhanced.

In some embodiments, the rear end of the shielding electrode is located between the rear end of the lead member and the rear end of the second electrode in the axial direction of the nib assembly, the rear end of the lead member protrudes beyond the rear end of the shielding electrode, and the rear end of the electrode assembly is for fixing to an external member. Wherein, the external component can be a capacitance pen main body.

In some embodiments, the insulating material is plastic and the first insulating portion and the second insulating portion are formed by an injection molding process.

In some embodiments, the tip housing includes a tip outer layer forming the tip, and a mounting member provided on an inner wall surface of the tip outer layer for accommodating a front end of the electrode assembly, and for fixedly and detachably connecting to the external member. Wherein, the external component can be a capacitance pen main body. When the nib wearing and tearing of nib dustcoat or nib dustcoat damaged, can dismantle the nib dustcoat from the external member to change new nib dustcoat, thereby guarantee the normal use that can of nib subassembly, keep the best of nib subassembly to alternately experience simultaneously.

The application provides a capacitance pen, which comprises a capacitance pen main body and the pen point component in any one of the embodiments. The pen point assembly has the advantages that electromagnetic wave signals emitted by the pen point assembly are uniform and stable, and the touch screen is accurate and high in identification of the pen point contact position and the pen point assembly angle. Meanwhile, the electrode assembly in the pen point assembly has the advantages of high strength and good stability.

In some embodiments, the capacitive pen body comprises a housing, and a main board assembly and a transmission rod disposed within the housing;

the rear end of the pen point outer cover extends into the shell and is fixedly and detachably connected with the transmission rod, and the rear ends of the guide connecting piece, the shielding electrode and the second electrode in the electrode assembly extend into the inner cavity of the transmission rod and are fixedly connected with the inner wall surface of the transmission rod and the transmission rod; and the rear ends of the guide connecting piece, the shielding electrode and the second electrode are respectively electrically connected with the mainboard assembly.

The rear end of the transmission rod is provided with a pressure sensor which is electrically connected with the main board assembly and used for detecting the acting force transmitted to the transmission rod by the pen point outer cover. The touch screen assembly is arranged on the touch screen, the touch screen is arranged on the touch screen assembly, the touch screen assembly is arranged on the touch screen assembly, and the touch screen assembly is arranged on the touch screen assembly.

In some embodiments, a gap is left between the part of the electrode assembly extending into the inner cavity of the driving rod and the inner wall surface of the driving rod, and the gap is filled with the flowing glue, so that the part of the electrode assembly extending into the inner cavity of the driving rod is fixed on the inner wall surface of the driving rod by a glue part formed by curing the flowing glue, the connection stability of the electrode assembly and the driving rod is enhanced, and the electrode assembly and the driving rod are prevented from shaking or loosening.

Drawings

Fig. 1 is a schematic structural diagram of a capacitive pen interacting with a touch screen according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a partial structure of a capacitive pen according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a nib assembly according to an embodiment of the present application;

FIG. 4a is a schematic diagram illustrating the principle of touch point position recognition of a pen tip of a capacitive stylus by a touch screen when the capacitive stylus and the touch screen form an inclined angle for use according to an embodiment of the present disclosure;

FIG. 4b is a schematic diagram illustrating an embodiment of the present application showing a touch point position of a capacitive pen nib on a touch screen during a capacitive pen is used perpendicular to the touch screen;

FIG. 5a is a schematic diagram illustrating a structure of a touch point position recognition of a pen tip of a capacitive pen by a touch screen when the capacitive pen and the touch screen form an inclined angle for use according to a reference design;

FIG. 5b is a schematic diagram of a touch point position recognition of a tip of a capacitive stylus by a touch screen when the capacitive stylus is used perpendicular to the touch screen according to the reference design;

fig. 6 is a schematic diagram illustrating a principle of a capacitive pen inclination angle recognition by a touch screen when the capacitive pen is used according to an embodiment of the present disclosure.

Description of reference numerals:

1. a capacitance pen;

10. a nib assembly; 101. a pen point; 102. a contact recognition electrode; 103. an electrode assembly;

11. a pen point outer cover; 111. an outer layer of the pen point; 112. a mounting member; 113. an internal thread;

12. a first electrode; 121. a sensing part; 122. a connecting portion;

13. a guide member; 131. a front end; 132. a back end;

14. a shield electrode; 141. a front end; 142. a back end;

15. a second electrode; 151. a front end; 152. a back end;

16. a first insulating portion;

17. a second insulating section;

20. a capacitive pen body;

21. a housing; 211. an opening;

22. a transmission rod; 221. an external thread; 222. an inner cavity;

23. a colloid part;

24. a wire;

3. a touch screen; 31. a glass cover plate; 32. a screen backplane;

alpha, inclination angle;

A. a first sensing position;

B. a second sensing position;

C. a capacitance value;

o, contact position;

x, axis.

In the reference design:

1', a capacitance pen; 101', a pen point;

12', a first electrode;

3', a touch screen; 31', a glass cover plate; 32', a screen backplane;

α', inclination angle;

a', a first sensing position;

C. a capacitance value;

o', contact location.

Detailed Description

The following description is given by way of specific embodiments, and the advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. While the description of the present application will be presented in conjunction with certain embodiments, this is not intended to limit the features of this application to that embodiment. On the contrary, the application of the present disclosure with reference to the embodiments is intended to cover alternatives or modifications as may be extended based on the claims of the present disclosure. In the following description, numerous specific details are included to provide a thorough understanding of the present application. The present application may be practiced without these particulars. Moreover, some of the specific details have been omitted from the description in order to avoid obscuring or obscuring the focus of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present application, it is to be understood that "electrically connected" in the present application is to be understood as components being in physical and electrical contact; it is also understood that different components in the circuit structure are connected by physical circuits such as Printed Circuit Board (PCB) copper foil or conductive wires capable of transmitting electrical signals. To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

For convenience of description, one end of each component in the capacitive pen, which is close to the pen point, is defined as a front end, and one end of each component, which is far away from the pen point, is defined as a rear end.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a capacitive pen interacting with a touch screen according to an embodiment of the present disclosure.

As shown in fig. 1, an embodiment of the present application provides a capacitive pen 1, configured to interact with a touch screen 3 of an electronic device, where the electronic device may be a tablet computer, a mobile phone, a notebook, a car machine, and the like. When the capacitive pen 1 performs a click, a slide, or the like on the touch screen 3, the touch screen 3 can make an instant feedback at the position of the pen tip 101 of the capacitive pen 1, for example, when the capacitive pen 1 clicks software displayed on the touch screen 3, the touch screen 3 instantly opens the corresponding software. Or when the capacitive pen 1 writes and draws on the touch screen 3, the touch screen 3 can display the handwriting of the pen point 101 of the capacitive pen 1 in real time.

Referring to fig. 2 and 3, fig. 2 is a schematic cross-sectional view of a partial structure of a capacitive pen according to an embodiment of the present application, and fig. 3 is a schematic cross-sectional view of a pen tip assembly according to the embodiment of the present application. As shown in fig. 2 and 3, and as will be understood in conjunction with fig. 1, capacitive pen 1 includes a nib assembly 10 and a capacitive pen body 20. Wherein, the outline of nib subassembly 10 is coniform setting, and the outline of electric capacity pen main part 20 is the setting of cylindrical pencil pole shape for electric capacity pen 1 can simulate the structure of traditional writing pens such as ballpoint pen or pencil, when the user uses electric capacity pen 1 to write on touch-sensitive screen 3, electric capacity pen 1 can simulate the sense of holding when the user uses traditional writing pens such as ballpoint pen or pencil to write. As can be understood by those skilled in the art, the capacitive pen 1 is a structure simulating a conventional writing pen such as a fountain pen, a ball-point pen or a pencil. The purpose is to facilitate the user to hold the capacitance pen 1 for input. Therefore, in other embodiments, the capacitive pen 1 may also adopt other grippable structures, for example, the outer profile of the pen tip assembly 10 may be polygonal pyramid, and the outer profile of the capacitive pen main body 20 may be polygonal prism, so that the capacitive pen 1 is not easy to roll on a plane, thereby reducing the risk that the capacitive pen 1 rolls off from other surfaces such as a desktop.

As shown in fig. 1-2, the capacitance pen main body 20 includes a housing 21 forming an outer contour of the capacitance pen main body 20, and a transmission rod 22 and a main board assembly 25 disposed inside the housing 21. The motherboard assembly 25 may include a motherboard (not shown in the figure) and devices (not shown in the figure) disposed on the motherboard, wherein the devices include a control circuit capable of sending an electrical signal (the electrical signal may be a voltage signal) and a communication module (the communication module may be a bluetooth module) capable of communicating with the touch screen 3, and a ground reference (not shown in the figure). The front end of the housing 21 has an opening 211 for the nib assembly 10 to pass through, so that part of the nib assembly 10 can extend into the housing 21 through the opening 211 at the front end of the housing 21 and be fixedly and detachably connected with the transmission rod 22 in the housing 21. It should be noted that, in fig. 2, the structure and the physical location of the motherboard assembly 25 are only schematic and do not represent the actual structure and the physical location.

As shown in fig. 2 to 3, the nib assembly 10 includes a nib housing 11, a contact recognition electrode 102, a second electrode 15, and a shield electrode 14. Wherein, the front end of the nib housing 11 forms a nib 101, and the contact point recognition electrode 102 may include a split type first electrode 12 and a guide 13. The front end of the first electrode 12 is fixed to the inner wall surface of the pen tip 101, and the rear end of the first electrode 12 is in contact with and electrically connected to the front end 131 of the lead 13.

The second electrode 15 is disposed in a tubular shape and surrounds an outer peripheral side of the lead 13, and the shield electrode 14 is disposed in a tubular shape and surrounds between an outer wall surface of the lead 13 and an inner wall surface of the second electrode 15. So that the lead 13, the shielding electrode 14 and the second electrode 15 are nested inside to outside.

The first insulating portion 16 and the second insulating portion 17 are formed by filling insulating materials (e.g., plastic, rubber, etc.) between the inner wall surface of the shield electrode 14 and the outer wall surface of the lead 13, and between the outer wall surface of the shield electrode 14 and the inner wall surface of the second electrode 15, respectively, so that the lead 13, the first insulating portion 16, the shield electrode 14, the second insulating portion 17, and the second electrode 15 form one integrated electrode assembly 103. And the first insulating portion 16 can electrically isolate the shielding electrode 14 from the lead 13, and the second insulating portion 17 can electrically isolate the shielding electrode 14 from the second electrode 15. Or it can be understood that a gap is formed between the inner wall surface of the shield electrode 14 and the outer wall surface of the lead 13 and a first insulating portion 16 is provided, and a gap is formed between the outer wall surface of the shield electrode 14 and the inner wall surface of the second electrode 15 and a second insulating portion 17 is provided. Therefore, the lead connector 13, the shielding electrode 14 and the second electrode 15 can be stably matched through the first insulating part 16 and the second insulating part 17, the strength and the stability of the integrated electrode assembly 103 structure are improved, the shielding electrode 14 can shield the lead connector 13 from sending electromagnetic wave signals, the signals between the lead connector 13 and the second electrode 15 are isolated, and the electromagnetic wave signals sent by the lead connector 13 are prevented from interfering the electromagnetic wave signals sent by the second electrode 15.

In one embodiment, the first insulating portion 16 has two ends flush with two ends of the shielding electrode 14, respectively, and the second insulating portion 17 has two ends flush with two ends of the second electrode 15, respectively. In other alternative embodiments, both ends of the first insulating portion 16 and both ends of the shielding electrode 14 may not be flush, and both ends of the second insulating portion 17 and both ends of the second electrode 15 may not be flush.

In one embodiment, the first electrode 12, the lead 13, the shield electrode 14, and the second electrode 15 may be made of a conductive material (e.g., metal).

In one embodiment, the insulating material forming the first and second insulating portions 16 and 17 may be plastic, and the plastic may be filled between the lead 13, the shielding electrode 14, and the second electrode 15 through an injection molding process to form the first and second insulating portions 16 and 17.

It will be understood by those skilled in the art that the first and second insulating portions 16 and 17 serve to electrically isolate the lead 13, the shield electrode 14, and the second electrode 15 and to firmly integrate the lead 13, the shield electrode 14, and the second electrode 15. Therefore, in other alternative embodiments, the material of the first insulating portion 16 and the second insulating portion 17 may also be insulating glue, and the insulating glue may also be poured between the conducting member 13, the shielding electrode 14 and the second electrode 15 to form the first insulating portion 16 and the second insulating portion 17.

In one embodiment, the electrode assembly 103 may further include a third electrode (not shown) disposed around an outer circumferential side of the rear end 152 of the second electrode 15, and a third insulating portion (not shown) is disposed between an outer wall surface of the second electrode 15 and an inner wall surface of the third electrode, so that the second electrode 15 is electrically isolated from the third electrode. The third electrode can be used for receiving a signal sent by the touch screen 3 to the capacitive pen 1, so that an interaction mode between the capacitive pen 1 and the touch screen 3 is increased, and the interaction flexibility between the capacitive pen 1 and the touch screen 3 is improved.

Of course, it can be understood by those skilled in the art that in other alternative embodiments, the third electrode may also be disposed in other arrangements, for example, the third electrode and the second electrode 15 are disposed at an interval in the axis X direction of the capacitance pen, the third electrode is disposed around the outer peripheral side of the lead 13, and a third insulating portion is disposed between the outer wall surface of the lead 13 and the inner wall surface of the third electrode, so as to electrically isolate the lead 13 from the third electrode.

In one embodiment, the leading end 131 of the lead 13, the leading end 141 of the shield electrode 14, and the leading end 151 of the second electrode 15 are all housed inside the pen tip housing 11. In the axis X direction of the capacitance pen 1, the front end 141 of the shielding electrode 14 is located between the front end 131 of the lead 13 and the front end 151 of the second electrode 15, and the front end 131 of the lead 13 extends out of the front end 141 of the shielding electrode 14, so that the front ends of the lead 13, the shielding electrode 14 and the second electrode 15 are arranged in a step shape. At this time, the front end 131 of the lead 13 constitutes the front end of the electrode assembly 103.

It will be understood by those skilled in the art that the shielding electrode 14 functions to shield the signal interference of the lead 13 to the second electrode 15, so that only the front end 141 of the shielding electrode 14 needs to protrude or be flush with the front end 151 of the second electrode 15, and the front end 131 of the lead 13 can contact and electrically connect with the rear end of the first electrode 12. Therefore, in other alternative embodiments, the front end 131 of the lead 13, the front end 141 of the shielding electrode 14, and the front end 151 of the second electrode 15 may adopt other relative positional relationships, for example, the front end 141 of the shielding electrode 14 is flush with the front end 151 of the second electrode 15, and the front end 131 of the lead 13 extends out of the front end 141 of the shielding electrode 14 and contacts and is electrically connected to the rear end of the first electrode 12. Alternatively, the front end 131 of the lead 13 is flush with the front end 141 of the shielding electrode 14, the front end 141 of the shielding electrode 14 extends beyond the front end 151 of the second electrode 15, and the front end 131 of the lead 13 is in contact with and electrically connected to the rear end of the first electrode 12.

Meanwhile, in the axis X direction of the capacitance pen 1, the rear end 142 of the shielding electrode 14 is located between the rear end 132 of the conducting member 13 and the rear end 152 of the second electrode 15, and the rear end 132 of the conducting member 13 extends out of the rear end 142 of the shielding electrode 14, so that the rear ends of the conducting member 13, the shielding electrode 14 and the second electrode 15 are also arranged in a step shape. At this time, the rear end 132 of the lead 13 constitutes the rear end of the electrode assembly 103. In other embodiments, the rear ends of the lead 13, the shielding electrode 14, and the second electrode 15 may be in other relative positions, such as the rear ends of the lead 13, the shielding electrode 14, and the second electrode 15 are flush, and the rear ends of the lead 13, the shielding electrode 14, and the second electrode 15 together form the rear end of the electrode assembly 103.

In one embodiment, the rear end 132 of the lead 13, the rear end 142 of the shielding electrode 14 and the rear end 152 of the second electrode 15 in the electrode assembly 103 all extend into the inner cavity 222 of the driving rod 22, and a gap is formed between the outer wall surface of the electrode assembly 103 and the inner wall surface of the driving rod 22, and the gap is filled with the flowable adhesive, so that the adhesive part 23 formed by curing the flowable adhesive fixes the rear end of the electrode assembly 103 to the inner wall surface of the driving rod 22. Since the rear ends of the electrodes of the electrode assembly 103 extend into the inner cavity 222 of the actuator rod 22 and are adhered and fixed to the inner wall surface of the actuator rod 22, the adhesion area and the adhesion length between the electrode assembly 103 and the inner wall surface of the actuator rod 22 are increased. Therefore, the electrode assembly 103 is not easy to loosen or separate from the inner wall surface of the transmission rod 22, and the electrode assembly 103 is not easy to deviate from the axis X of the capacitance pen 1 to generate shaking or bending deformation. When the capacitance pen 1 is used, the electrode assembly 103 is prevented from loosening or shaking, and the input experience of a user is prevented from being influenced. In alternative embodiments, the electrode assembly 103 can also be fixedly connected to the transmission rod 22 by other fixing means, for example, by welding, or only the rear end 132 of the guide piece 13 and the rear end 142 of the shielding electrode 14 can extend into the interior 222 of the transmission rod 22, or only the rear end 132 of the guide piece 13 can extend into the interior 222 of the transmission rod 22.

Further, the rear ends of the lead 13 and the second electrode 15 are electrically connected to the control circuit of the main board assembly 25 through the wires 24, respectively, so that the control circuit of the main board assembly 25 can emit the first electrical signal and the second electrical signal to the lead 13 and the second electrode 15, respectively. The rear end 142 of the shielding electrode 14 is electrically connected to the reference ground of the motherboard assembly 25 through the lead 24, thereby functioning as a shield against signal interference. In other alternative embodiments, the lead 13, the shielding electrode 14 and the rear end of the second electrode 15 may be electrically connected to the main board assembly 25 by other means, for example, by using a port connection.

In the process of inputting by using the capacitance pen 1, the control circuit of the main board assembly 25 can continuously send the first electrical signal and the second electrical signal to the guide piece 13 and the second electrode 15 of the contact point identification electrode 102, respectively, and simultaneously the guide piece 13 transmits the first electrical signal to the first electrode 12 on the inner wall surface of the pen point 101. At this time, the first electrode 12 and the second electrode 15 can continuously emit electromagnetic wave signals to the outside, respectively.

In one embodiment, the center lines of the pen tip housing 11, the first electrode 12, the lead 13, the second electrode 15, and the shielding electrode 14 are all disposed along the axis X of the capacitive pen 1. In other alternative embodiments, the center lines of tip housing 11, first electrode 12, lead 13, second electrode 15, and shield electrode 14 may also be offset from axis X.

Referring to fig. 4a and 4b, fig. 4a is a schematic diagram illustrating a principle of recognizing a touch point position of a pen tip of a capacitive pen by a touch screen when the capacitive pen and the touch screen form an inclined angle for use, and fig. 4b is a schematic diagram illustrating a principle of recognizing a touch point position of a pen tip of a capacitive pen by a touch screen when the capacitive pen and the touch screen form an inclined angle for use. And only the structure directly related to the contact position recognition principle is shown in fig. 4a and 4 b.

As shown in fig. 4a and 4b, the touch screen 3 includes a screen back plate 32 and a glass cover plate 31, and when the nib 101 of the capacitive pen 1 approaches or contacts the surface of the touch screen 3, an insulating substance (including air, a nib outer layer 111, the glass cover plate 31, and the like) exists between the first electrode 12 in the nib 101 and the screen back plate 32. So that the first electrode 12, the screen backplate 32 and the insulating substance constitute a small capacitance. Thus, the electromagnetic wave signals emitted by the first electrode 12 and the first electrode 12 in the pen tip 101 can jointly cause the capacitance value of the touch screen 3 to change, and the touch screen 3 is provided with a sensing device (not shown in the figure) capable of detecting the capacitance value on the touch screen 3, so as to obtain a curve of the capacitance change, as shown in the capacitance graph of fig. 4a and 4b, wherein the curve of the graph represents the capacitance of the screen backboard 32 at different positions. And the closer the relative position of the first electrode 12 and the touch screen 3 is, the larger the capacitance value sensed by the screen back plate 32 is. Therefore, the position of the capacitance peak in the screen backplate 32 is closest to the relative position of the first electrode 12. The touch screen 3 determines the position of the capacitance peak generated in the screen back plate 32 in response to the electromagnetic wave signal emitted from the first electrode 12 as the first sensing position a.

Therefore, the touch screen 3 can indirectly recognize the relative position of the first electrode 12 and the touch screen 3 by recognizing the first sensing position a. And the first electrode 12 is disposed on the inner wall surface of the pen tip 101, so that the first sensing position a sensed by the touch screen 3 is close to the touch point position O of the pen tip 101.

Meanwhile, when the pen point 101 of the capacitive pen 1 performs input at different tilt angles α, the contact point position O of the pen point 101 and the touch screen 3 is located on the upper surface of the glass cover plate 31, the first sensing position a determined by the touch screen 3 is located on the upper surface of the screen back plate 32, and a projection of the first sensing position a on the upper surface of the glass cover plate 31 is close to or even coincides with the contact point position O. At this time, the first sensing position a can maintain a positional relationship corresponding to the contact point position O of the pen tip 101 at different inclinations α. Further, the touch screen 3 can adjust the first sensing position a according to the change of the inclination angle α to obtain a display position with the best interaction experience, so that a user can obtain the best display feedback, and the interaction experience of the user is improved.

In one embodiment, the first electrode 12 on the inner wall surface of the pen tip 101 is an integral component, and includes a sensing portion 121 forming the front end of the first electrode 12 and a connecting portion 122 forming the rear end of the first electrode 12, wherein the sensing portion 121 is disposed in a hemispherical shape, the surface of the sensing portion 121 attached to the inner wall surface of the pen tip 101 is disposed in a spherical shape, the surface of the sensing portion 121 connected to the connecting portion 122 is disposed in a planar shape, so that the intensity of the electromagnetic wave signal emitted by the front end of the sensing portion 121 in each direction is relatively uniform, the capacitance variation curve sensed by the screen back plate 32 has an obvious peak value, which is beneficial to quickly and accurately identifying the first sensing position a, and the electromagnetic wave signal emitted by the sensing portion 121 at each angle, the relative position between the first sensing position a identified by the touch screen 3 and the sensing portion 121 remains unchanged or substantially unchanged, so that the touch screen 3 can adjust the first sensing position a according to the change of the inclination angle α, resulting in a display position with the best interaction experience. The connecting portion 122 is disposed in a cylindrical rod shape, and a projection of the connecting portion 122 along the X-axis direction is located within a boundary of a projection of the sensing portion 121 along the X-axis direction. So that the volume of the connection portion 122 is reduced. Thereby reducing the interference of the electromagnetic wave signal emitted from the connecting portion 122 to the electromagnetic wave signal with uniform intensity emitted from the sensing portion 121. The stability of the electromagnetic wave signal sent by the sensing portion 121 is improved, so that the capacitance variation curve sensed by the screen back plate 32 is kept stable, and the accuracy and stability of identifying the first sensing position a by the touch screen 3 are improved.

As will be understood by those skilled in the art, the first electrode 12 is used to generate an electromagnetic wave signal with uniform intensity, so that the position of the first sensing signal a recognized by the touch screen 3 is kept unchanged or substantially unchanged relative to the touch point position O. Therefore, in other embodiments, the first electrode 12 may have other structures, such as a droplet shape and a spherical shape.

Referring to fig. 5a and 5b, fig. 5a is a schematic diagram illustrating a structure of a capacitive pen nib for identifying a touch point position of a touch screen when the capacitive pen provided by the reference design and the touch screen form an inclination angle for use, and fig. 5b is a schematic diagram illustrating a structure of a capacitive pen nib of a touch screen when the capacitive pen provided by the reference design is perpendicular to the touch screen for use. As shown in fig. 5a and 5b, in the reference design, the first electrode 12 ' of the capacitance pen 1 ' is truncated cone-shaped and is disposed on the inner wall surface of the pen tip 101 ', and the cross-sectional area of the front end of the first electrode 12 ' is smaller than that of the rear end, so that the intensity of the electromagnetic wave signal generated by the first electrode 12 ' is not uniform. At this time, the capacitance variation curve induced by the screen back plate 32 'to the first electrode 12' is shown in the capacitance graphs in fig. 5a and 5 b. When the capacitive pen 1 'is used perpendicular to the touch screen 3', a capacitance curve that can be recognized by the screen back plate 32 'has a distinct peak value, so that the touch screen 3' can stably recognize the first sensing position a ', and the first sensing position a' corresponds to the actual contact point position O 'of the pen tip 101'. However, when the capacitive pen 1 ' and the touch screen 3 ' form the inclination angle α ' for use, the capacitance curve sensed by the screen back plate 32 ' is relatively gentle, and it is difficult to quickly and accurately identify the peak position of the capacitance (i.e., the first sensing position a '), and meanwhile, the first sensing position a ' and the actual contact point position O ' of the pen tip 101 ' are mutually dislocated, which indicates that a deviation is generated between the first sensing position a ' when the first sensing position a ' is perpendicular to the pen tip 101 ', resulting in a large deviation of the pen tip 101 ' at the same contact point position O ' and the first sensing position a ' at different inclination angles α ', so that the touch screen 3 ' is difficult to obtain a display position with the best interaction experience according to the first sensing position a ' and by combining the inclination angle α ' of the capacitive pen 1 ', thereby reducing the interaction experience of the user.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a principle of inclination angle recognition of a capacitive pen by a touch screen when the capacitive pen is used according to an embodiment of the present disclosure, and fig. 6 only shows a structure directly related to the principle of inclination angle recognition of the capacitive pen. As shown in fig. 6, during the use of the capacitive pen 1, the electromagnetic wave signals emitted by the second electrode 15 and the second electrode 15 in the capacitive pen 1 can also cause the capacitance value of the touch screen 3 to change, and a sensing device (not shown in the figure) disposed on the touch screen 3 can recognize the curve of the capacitance change of the touch screen 3 in response to the second electrode 15, as shown in the capacitance graph in fig. 6. Therefore, the position of the capacitance peak generated in the screen back 32 in response to the electromagnetic wave signal emitted from the second electrode 15 is determined as the second sensing position B.

When the intensity of the electromagnetic wave signal emitted from the second electrode 15 is kept stable, the distance between the second electrode 15 and the screen backboard 32 can affect the capacitance at the second sensing position B. When the position of the second electrode 15 on the capacitance pen 1 is relatively fixed, the distance between the second electrode 15 and the screen backboard 32 changes with the change of the inclination angle α of the capacitance pen 1. Meanwhile, the position of the second sensing position B also changes with the position of the capacitance peak. Thereby constructing a database of capacitance values C at the corresponding second sensing positions B at different tilt angles alpha of the stylus 1. The touch screen 3 can identify the capacitance C at the second sensing position B and perform matching in the database to obtain the inclination angle α of the capacitive pen 1. In other embodiments, a functional relationship between the inclination angle α of the capacitive pen 1 and the capacitance value C at the second sensing position B can be obtained through calculation, so that the touch screen 3 can identify the capacitance value C at the second sensing position B and calculate the inclination angle α of the capacitive pen 1 by using the functional relationship.

Referring to fig. 2 again, as will be understood from fig. 1, the transmission rod 22 disposed inside the casing 21 is tubular, and the front end of the transmission rod 22 is located near the opening 211 of the casing 21 so as to connect with the portion of the pen tip assembly 10 extending into the casing 21. The rear end (not shown) of the driving lever 22 firmly fixes the driving lever 22 to the inner wall surface of the housing 21 by a support (not shown), so that the driving lever 22 is kept relatively fixed to the housing 21. And the center lines of the transmission rod 22 and the shell 21 are arranged along the axis X of the capacitance pen 1. So that when the housing 21 rotates along the axis X, the transmission lever 22 is prevented from rotating eccentrically, reducing the stability of the transmission lever 22. In other embodiments, the center line of the transmission rod 22 may also be offset from the axis X of the capacitive stylus 1.

In addition, a pressure sensor (not shown in the figure) is disposed at the rear end of the transmission rod 22, the pressure sensor is electrically connected to the communication module of the main board assembly 25, and is configured to detect an acting force (i.e., a pressure value between the pen point 101 and the touch screen 3) transmitted to the transmission rod 22 by the pen point assembly 10, and transmit the pressure value to the communication module of the main board assembly 25, and send pressure value information to the touch screen 3 by the communication module of the main board assembly 25, so that the touch screen 3 can immediately make pressure feedback according to the pressure value, and change a display effect of the touch screen 3 at the first sensing position a (as shown in fig. 4 a). The design can provide good pressure feedback, and the interaction experience between the capacitance pen 1 and the touch screen 3 is enhanced.

As will be appreciated by those skilled in the art, the primary function of the transmission rod 22 is to connect the nib assembly 10 and transmit the force between the nib assembly 10 and the touch screen 3. Therefore, in other embodiments, the transmission rod 22 may have other structures that have sufficient strength and can be connected to the nib assembly 10. For example, the driving rod 22 may have a cylindrical structure, and the opening of the driving rod 22 is the front end of the driving rod 22 so as to connect with the portion of the nib assembly 10 extending into the housing 21.

Referring to fig. 3 again, as will be understood from fig. 2, the front end of the pen nib housing 11 is formed with a spherical pen nib 101, so that when the pen nib 101 slides on the touch screen 3, the pen nib keeps a smooth sliding feel, and the input experience of the user is improved. In other embodiments, the pen tip 101 may have other shapes, such as a curved shape. Tip cover 11 includes a tip outer layer 111 constituting an outer contour of tip unit 10, and a mounting member 112 provided on an inner wall surface of tip outer layer 111. The outer wall surface of the front end of the pen tip outer layer 111 forms the front end of the pen tip outer cover 11, so that the front end of the pen tip outer layer 111 forms the pen tip 101, and the pen tip outer layer 111 may be made of insulating materials (e.g., rubber and plastic) of different materials, so that when the pen tip outer layer 111 made of different materials slides and inputs on the touch screen 3, different sliding and input hand feelings (e.g., a damping feeling when the pen tip 101 slides on the touch screen 3, and a click feeling when the pen tip 101 collides with the touch screen 3) can be generated. The user can experience the input hand feeling of the capacitive pen 1 in various different ways only by replacing the pen point outer cover 11 provided with the pen point outer layer 111 made of different materials, so that the individualized use requirements of different users are met.

In one embodiment, the portion of the mounting member 112 fixedly connected to the tip outer layer 111 is a front half of the mounting member 112, and the portion of the mounting member 112 extending out of the tip outer layer 111 is a rear half. The outer wall surface of the first half section of the mounting member 112 is circumferentially arranged on the inner wall surface of the pen tip outer layer 111 and is integrally formed with the pen tip outer layer 111, and the inner wall surface of the first half section of the mounting member 112 circumferentially encloses a truncated cone-shaped inner cavity, so that the front end 131 of the guide member 13, the front end 151 of the second electrode 15 and the front end 141 of the shielding electrode 14 in the electrode assembly 103 are all accommodated in the inner cavity of the first half section of the mounting member 112. The inner wall surface of the rear half of the mounting member 112 circumferentially encloses a cylindrical cavity. So that the rear end of the rear half of the mounting member 112 can be wrapped around the outer wall of the drive rod 22 and fixedly and removably attached to the drive rod 22.

As will be appreciated by those skilled in the art, the mounting member 112 functions to form an internal cavity to receive all or part of the electrode assembly 103 and is adapted for fixed and removable connection with the actuator rod 22. Thus, in alternative embodiments, the mounting member 112 may have other configurations, and the interior of the forward half of the mounting member 112 may only receive the forward end 131 of the lead 13 of the electrode assembly 103.

Further, the inner wall surface of the rear end of the mounting member 112 is provided with an internal thread 113, and the outer wall surface of the front end of the driving rod 22 is provided with an external thread 221 adapted to the internal thread 113, so that the rear end of the mounting member 112 can be fixedly and detachably mounted to the front end of the driving rod 22 through screwing. In other embodiments, the rear end of the mounting member 112 can be fixedly and detachably connected to the front end of the transmission rod 22 by other connection methods such as a snap connection.

In the using process, the pen point 101 of the pen point outer layer 111 is often rubbed with the touch screen 3, so that the pen point 101 of the pen point outer layer 111 is easily worn, and the input hand feeling is influenced; or the pen point 101 of the capacitance pen 1 is damaged by impact (such as the capacitance pen 1 falls to impact the pen point 101), so that normal writing cannot be performed. Therefore, the nib housing 11 is a consumable item that needs to be replaced frequently, and the nib housing 11 and the transmission rod 22 are fixedly and detachably connected, so that a user can replace the nib housing 11 by himself or herself conveniently and quickly.

In addition, the mode that can dismantle fixed connection between nib dustcoat 11 and the transfer line 22 can also the person of facilitating the use through changing the nib dustcoat 11 of making by the outer 111 of nib of different materials, makes electric capacity pen 1 can realize the input of multiple different feels and experience to satisfy the user demand of user of service in different usage processes. For example, the user uses the pen tip outer cover 11 made of the pen tip outer layer 111 with soft texture in the writing and drawing processes to meet the comfortable input hand feeling; or when a user carries the capacitance pen 1 for use, the pen point outer cover 11 made of the pen point outer layer 111 which is hard and wear-resistant is adopted to better protect the pen point outer cover 11 so as to prevent the pen point outer cover 11 from being damaged.

The inner wall surface of the front end of the pen point outer cover 11 is also provided with a first electrode 12, wherein the front end of the first electrode 12 is embedded in the inner wall surface of the front end of the pen point outer layer 111, the side wall surface of the rear end of the first electrode 12 is fixed on the inner wall surface of the front end of the mounting part 112, and the end surface of the rear end of the first electrode 12 is in contact with the front end of the guide part 13 to form electric connection. In one embodiment, the first electrode 12 is integrally formed with the tip housing 11 by an injection molding process. In other alternative embodiments, the first electrode 12 may be fixed to the inner wall surface of the front end of the pen tip housing 11 by adhesive fixing.

When the tip outer layer 111 and the first electrode 12 are simultaneously worn seriously, the tip outer cover 11 and the first electrode 12 embedded in the tip outer cover 11 can be replaced simultaneously. The capacitance pen 1 with the pen tip cover 11 and the first electrode 12 replaced can obtain the best input experience.

It will be understood by those skilled in the art that the first electrode 12 only needs to be disposed at a position at the front end of the pen tip housing 11 close to the pen tip 101, and the purpose of this is to make the touch screen 3 recognize that the first sensing position a (shown in fig. 4 a) of the first electrode 12 is closer to the actual position of the pen tip 101, and to make the first electrode 12 be able to be removed and replaced synchronously with the pen tip housing 11. Therefore, in another embodiment, the first electrode 12 may be fixed to the tip of the pen tip cover 11 in another manner, for example, a fixing manner in which the tip and the side wall of the first electrode 12 are both fitted into the pen tip outer layer 111.

In other alternative embodiments, to ensure good contact between first electrode 12 and the forward end of lead 13 within nib housing 11, the contact is maintained. The conductive connecting part 13 may include a contact (not shown), an elastic part (not shown) and a conductive connecting part body (not shown), wherein the contact constitutes the front end of the conductive connecting part 13, and the rear end of the contact is embedded in the conductive connecting part body and connected to the conductive connecting part body through the elastic part, so that the elastic part applies an elastic force towards the first electrode 12 to the contact, thereby ensuring that the contact can be contacted with the first electrode 12 at any time to form an electrical connection, and avoiding the influence on the normal use of the capacitive pen 1 due to the separation between the front end of the conductive connecting part 13 and the first electrode 12.

It will be apparent to those skilled in the art that various changes and modifications can be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

Claims (10)

1. A nib assembly for a capacitive pen, comprising:

a nib housing, a front end of which forms a nib;

the contact point identification electrode comprises a first electrode and a guide connecting piece, the front end of the first electrode is fixed on the inner wall surface of the pen point, and the rear end of the first electrode is in contact with and electrically connected with the front end of the guide connecting piece;

the second electrode is arranged around the outer periphery of the lead connector;

the shielding electrode is arranged between the outer wall surface of the guide connecting piece and the inner wall surface of the second electrode in a surrounding mode; wherein,

forming a first insulating part and a second insulating part by filling insulating materials between an inner wall surface of the shielding electrode and an outer wall surface of the lead connector and between an outer wall surface of the shielding electrode and an inner wall surface of the second electrode, respectively, so that the lead connector, the first insulating part, the shielding electrode, the second insulating part and the second electrode form an integrated electrode assembly; the first insulating part is used for electrically isolating the shielding electrode from the conducting piece, and the second insulating part is used for electrically isolating the shielding electrode from the second electrode;

the front end of the electrode assembly is arranged on the inner side of the pen point outer cover, and the rear ends of the guide connecting piece, the shielding electrode and the second electrode are electrically connected with the main board assembly.

2. The nib assembly of claim 1, wherein the first electrode is an integral member including a sensing portion forming a front end of the first electrode and a connecting portion forming a rear end of the first electrode, a surface of the sensing portion, which is in contact with an inner wall surface of the nib, is provided in a spherical shape, and a projection of the connecting portion in an axial direction of the nib assembly is located within a boundary of a projection of the sensing portion in the axial direction of the nib assembly.

3. The nib assembly of claim 2, wherein the sensing portion is formed in a hemispherical shape, the connecting portion is formed in a rod shape, and a front end of the connecting portion is located at a center of a rear end surface of the sensing portion.

4. The pen tip assembly of claim 1, wherein the front end of the shield electrode protrudes beyond the front end of the second electrode in the axial direction of the pen tip assembly; the front end of the guide connecting piece extends out of the front end of the shielding electrode or is flush with the front end of the shielding electrode.

5. The pen tip assembly of claim 1, wherein the rear end of the shielding electrode is located between the rear end of the lead member and the rear end of the second electrode in the axial direction of the pen tip assembly, and the rear end of the lead member protrudes beyond the rear end of the shielding electrode, and the rear end of the electrode assembly is adapted to be fixed to an external member.

6. The pen tip assembly of claim 1, wherein the insulating material is plastic, and the first insulating portion and the second insulating portion are formed by an injection molding process.

7. The nib assembly of any one of claims 1 to 6, wherein the nib housing includes a nib outer layer forming the nib, and a mounting member provided on an inner wall surface of the nib outer layer, an inner side of the mounting member receiving a front end of the electrode assembly, the mounting member being fixedly and detachably coupled to an external member.

8. A capacitive pen comprising a capacitive pen body and further comprising the nib assembly of any one of claims 1 to 7.

9. The stylus according to claim 8, wherein the stylus body comprises a housing, and a motherboard assembly and a drive link disposed within the housing;

the rear end of the pen point outer cover extends into the shell and is fixedly and detachably connected with the transmission rod, and the rear ends of the guide connecting piece, the shielding electrode and the second electrode in the electrode assembly extend into the inner cavity of the transmission rod and are fixedly connected with the inner wall surface of the transmission rod; the rear ends of the guide connecting piece, the shielding electrode and the second electrode are respectively electrically connected with the mainboard assembly;

the rear end of transfer line is provided with pressure sensor, pressure sensor with the mainboard subassembly electricity is connected, and be used for detecting by the nib dustcoat transmits to the effort of transfer line.

10. The capacitance pen as claimed in claim 9, wherein a gap is left between the portion of the electrode assembly extending into the interior cavity of the driving rod and the inner wall surface of the driving rod, and the gap is filled with a flowable adhesive, so that the portion of the electrode assembly extending into the interior cavity of the driving rod is fixed to the inner wall surface of the driving rod by a glue portion formed by curing the flowable adhesive.

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