Digital pen
By designing the first and second electrodes of the electronic pen as independent structures and connecting them with the pen tip, the assembly process of the electrode assembly is simplified, solving the problems of high production difficulty and low yield in the existing technology, and realizing low-cost and high-efficiency electrode assembly manufacturing.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHENZHEN XINWEI INTELLIGENT TECH CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-06-04
AI Technical Summary
The electrode components of existing electronic pens are difficult to manufacture and process, have a low yield rate, and the multiple integration processes lead to production difficulties and high costs.
The electronic pen's first and second electrodes are designed as independent structures, connected to the pen barrel via the pen tip, simplifying the assembly process and avoiding multiple integration processes.
This reduced production costs, increased yield, and ensured the reliability and stability of the electrode assembly.
Smart Images
Figure CN2025119268_04062026_PF_FP_ABST
Abstract
Description
An electronic pen
[0001] This application claims priority to Chinese Patent Application No. 202411722932.7, filed on November 27, 2024, entitled "An Electronic Pen", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This invention relates to the field of terminal technology, and more specifically to an electronic pen. Background Technology
[0003] An electronic pen is a device that combines pen-and-paper writing with digital technology. It is typically used as a digital handwriting input tool, recording the user's handwriting in real time and converting it into digital form for storage or transfer to a computer or other device. Electronic pens generally contain electrode components for transmitting or receiving signals. Currently, these electrode components are usually integrated into a single unit using injection molding and electroplating methods. However, these electrode components often require multiple injection molding and electroplating processes, and this multi-stage integration process makes manufacturing difficult and results in a low yield rate. Summary of the Invention
[0004] In view of this, the present invention provides an electronic pen to solve the problems of high difficulty in manufacturing and processing electrode components and low yield rate.
[0005] In a first aspect, the present invention provides an electronic pen, comprising: a pen barrel having a first receiving cavity, and one end of the pen barrel having an opening communicating with the first receiving cavity; a pen tip located on one side of the opening; a first electrode passing through the first receiving cavity; the pen tip being detachably connected to the first electrode through the opening; a second electrode being fixedly connected to the pen barrel, and at least a portion of its structure passing through the first receiving cavity; the second electrode being sleeved on the outside of the first electrode and spaced apart from the first electrode.
[0006] Optionally, the pen tip includes a conductive element and a pen tip shell. One end of the conductive element is connected to the pen tip shell, and the other end is detachably connected to the first electrode. The pen tip shell has an annular groove on the side facing the pen barrel. The annular groove extends circumferentially around the conductive element and is spaced apart from the conductive element. The second electrode is sleeved on the outside of the conductive element, and at least a portion of the structure of the second electrode is embedded in the annular groove, spaced apart from the conductive element.
[0007] Optionally, an annular boss is formed at the opening of the pen barrel, and the second electrode includes a first tube and a second tube, which are coaxially connected; at least a portion of the structure of the first tube is located outside the first receiving cavity, and the second tube is located inside the first receiving cavity. The first tube and the second tube respectively abut against the two sides of the annular boss to fix them to the pen barrel.
[0008] Optionally, the electronic pen further includes: a first support member located within a first receiving cavity; the first support member having a second receiving cavity communicating with the first receiving cavity, and at least a portion of the structure of the second tube body located within the second receiving cavity; and an insulating ring disposed within the second receiving cavity and sleeved on the outside of the second tube body to isolate the first support member and the second tube body.
[0009] Optionally, the electronic pen also includes a third electrode, which is disposed on an insulating ring and spaced apart from the second tube.
[0010] Optionally, the electronic pen further includes: a first support member located within a first receiving cavity; the first support member having a second receiving cavity communicating with the first receiving cavity; a third tube body located within the first receiving cavity and fixedly connected to the end of the first support member away from the pen tip; the third tube body having a third receiving cavity communicating with the second receiving cavity; a second support member located within the third receiving cavity and connected to the third tube body; and at least a portion of the structure of the first electrode located within the third receiving cavity and connected to the second support member.
[0011] Optionally, the second support member has a mounting groove, and at least a portion of the structure of the first electrode is located within the mounting groove; the electronic pen further includes: a main board member located on the side of the first electrode away from the bottom wall of the groove; the main board member is electrically connected to the first electrode and the second electrode; a plurality of connectors penetrate the second support member, the first electrode and the main board member to fix the second support member, the first electrode and the main board member together; the connectors are electrically connected to the grounding terminal of the main board member.
[0012] Optionally, the electronic pen further includes: a first insulating member disposed in the mounting groove and located between the first electrode and the second support member; and a second insulating member located between the first electrode and the main board member.
[0013] Optionally, the second support member, the first insulating member, the first electrode, the second insulating member, and the main board member together form a plurality of connection holes, and the plurality of connectors are respectively disposed in the plurality of connection holes; the connection holes include a first connection hole and a second connection hole, the first connection hole being formed in the second support member and the second connection hole being formed in the first electrode; wherein, the second support member is provided with a first annular protrusion extending around the first connection hole, the first annular protrusion extending toward the second connection hole; the connectors are connected in the first annular protrusion; the first insulating member is provided with a second annular protrusion, the second annular protrusion extending toward the second connection hole and surrounding the outside of the first annular protrusion.
[0014] Optionally, the electronic pen also includes a sensor located in the third receiving cavity and connected to the third tube and the second support respectively; the sensor is connected to the first electrode through the second support to sense the force transmitted by the first electrode, and the sensor is electrically connected to the main board.
[0015] Optionally, the sensor and the third tube are integrally molded.
[0016] Optionally, the sensing element includes: a deformation section, which includes an overlapping section and a deformable section connected to each other, the overlapping section and the deformable section being intersected; the overlapping section is fixedly connected to a second support member, and the end of the deformable section away from the overlapping section is connected to a third tube body; a first electrode transmits the force to the deformable section through the second support member and the overlapping section, so that the deformable section deforms; and a sensing section, connected to the deformable section, for sensing the force information received on the deformable section.
[0017] Using the technical solution of this invention, the second electrode is fixed to the pen barrel, and the first electrode is disposed in the first receiving cavity of the pen barrel, and is connected to the pen tip as an integral structure through an opening. This electronic pen, by designing the first and second electrodes as independent structures and connecting them as an integral unit using the pen tip and pen barrel, eliminates the need for multiple integration processes. The electrode assembly can be formed through simple assembly, making it easy to process and manufacture, reducing production costs; moreover, the assembly method is simple and reliable, improving the yield rate. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 is a cross-sectional view of a partial structure of an electronic pen according to an embodiment of the present invention;
[0020] Figure 2 is a magnified view of part A in Figure 1;
[0021] Figure 3 is a schematic diagram of the structure of a second electrode according to an embodiment of the present invention;
[0022] Figure 4 is a schematic diagram of the structure of a first electrode according to an embodiment of the present invention;
[0023] Figure 5 is a partial structural schematic diagram of an electronic pen according to an embodiment of the present invention;
[0024] Figure 6 is a structural schematic diagram of a first support member according to an embodiment of the present invention;
[0025] Figure 7 is a schematic diagram of an insulating ring according to an embodiment of the present invention;
[0026] Figure 8 is a schematic diagram of the assembly of a first support member and a third tube body according to an embodiment of the present invention;
[0027] Figure 9 is a structural schematic diagram of a second support member and bracket according to an embodiment of the present invention;
[0028] Figure 10 is a schematic diagram of the structure of a first insulating element according to an embodiment of the present invention.
[0029] Explanation of reference numerals in the attached drawings: 1. Pen barrel; 1a. First receiving cavity; 1b. Opening; 1c. First conical segment; 1d. Annular boss; 2. Pen tip; 21. Conductor; 211. Ball head; 212. Barrel; 22. Pen tip shell; 221. Annular groove; 3. First support member; 30. Second receiving cavity; 31. Second conical segment; 32. Main body segment; 33. Connecting segment; 331. Slot; 34. Countersunk platform; 4. First electrode; 41. First connecting part; 411. Countersunk hole; 42. Fixing part; 421. Second connecting hole; 5. Second electrode; 51. First tube body; 511. Straight part; 512. Conical part; 52. Second tube body; 521. Large diameter part; 522. Small diameter part; 6. Insulating ring; 61. First ring body part; 62. Flange part; 7. Third tube body; 70. Third receiving cavity; 71. Locking block; 72. Bracket; 721. Second annular part; 722. Second connecting part; 8. Second support member; 811. Mounting groove; 812. First connecting hole; 813. First annular protrusion; 814. Third connecting part; 9. Main board component; 10. Connector; 11. First insulating member; 110. Third connecting hole; 111. Second annular protrusion; 12. Second insulating member; 13. Sensing element; 131. Deformation part; 1311. Overlapping section; 1312. Deformation section; 132. Sensing part; X, First direction; Y, Second direction. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] Electronic pens are widely used in tablets, office computers, mobile phones, and other fields. Existing electronic pens generally include an electrode assembly for transmitting and receiving signals. This assembly typically includes a transmitting electrode, a receiving electrode, and other structures. The transmitting electrode transmits signals, and the receiving electrode receives signals. Structurally, the transmitting electrode is a metal component built into the pen tip, serving as the transmitting end. This metal component is connected to the transmitting electrode, which is then connected to the motherboard via a flexible printed circuit (FPC). During operation, the motherboard transmits an electrical signal to the metal component within the pen tip. This component is typically a metal ball, which creates an electric field. Changes in this electric field are read by the host device (such as a tablet), resulting in a writing or drawing response. Structurally, the receiving electrode is also connected to the motherboard via a spring-like or other elastic metal conductive structure, connected to the FPC. During operation, the receiving electrode receives electric field changes from the host device and transmits them to the motherboard, causing the electronic pen to respond. The receiving electrode can also be used as a transmitting electrode, allowing the host device to detect pen tilt and respond to different writing thicknesses.
[0032] Currently, electrode components in related technologies are typically assembled into a single part through injection molding, electroplating, or other methods. The electrode circuitry is then connected to the motherboard via spring contacts or FPC structures. Injection molding of electrode components requires injecting different processing materials into the mold. This process is complex and prone to errors, leading to defective electrode components and a low yield rate.
[0033] In view of the above, embodiments of this application provide an electronic pen to overcome at least one of the aforementioned technical problems. Embodiments of the present invention are described below with reference to Figures 1 to 10.
[0034] According to an embodiment of the present invention, an electronic pen is provided, as shown in FIG1. The electronic pen includes a pen barrel 1, a pen tip 2 disposed at one end of the pen barrel 1, and a first electrode 4 and a second electrode 5 disposed inside the pen barrel 1.
[0035] Specifically, the pen barrel 1 has a first receiving cavity 1a, which extends along a first direction X; and one end of the pen barrel 1 along the first direction X has an opening 1b, which communicates with the first receiving cavity 1a. The pen tip 2 is located at one end of the pen barrel 1 along the first direction X, specifically on one side of the opening 1b of the pen barrel 1. The first direction X specifically refers to the length direction of the pen barrel 1. A first electrode 4 passes through the first receiving cavity 1a, specifically along the first direction X. The pen tip 2 is detachably connected to the first electrode 4 through the opening 1b. A second electrode 5 is fixedly connected to the pen barrel 1, and at least a portion of the structure of the second electrode 5 passes through the first receiving cavity 1a. The second electrode 5 is sleeved on the outside of the first electrode 4 and spaced apart from the first electrode 4.
[0036] In this embodiment, the second electrode 5 is fixed to the pen barrel 1, and the first electrode 4 is disposed in the first receiving cavity 1a of the pen barrel 1 and connected to the pen tip 2 as an integral structure through the opening 1b. This electronic pen, by designing the first electrode 4 and the second electrode 5 as independent structures and connecting them as a single unit using the pen tip 2 and the pen barrel 1, eliminates the need for multiple integration processes. The electrode assembly can be formed through simple assembly, making it easy to process and manufacture, reducing production costs; moreover, the assembly method is simple and reliable, improving the yield rate.
[0037] Understandably, in this embodiment, the first electrode 4 can be a transmitting electrode, and the connection between the pen tip 2 and the first electrode 4 ensures a sensitive response of the first electrode 4 to pressure applied to the pen tip 2. The second electrode 5 can be a receiving electrode, and the second electrode 5 is fixed to the pen barrel 1, so the second electrode 5 will not tilt or shift due to the movement of the pen tip 2, thus improving the reliability of the electronic pen.
[0038] For ease of description, the extension direction of pen barrel 1 is defined as the first direction X, and the direction perpendicular to the first direction X is defined as the second direction Y. In some cases, the first direction X is the direction of the central axis of pen barrel 1, and the second direction Y is the radial direction of pen barrel 1.
[0039] In some embodiments, as shown in FIG2, an annular boss 1d is formed at the opening 1b of the pen barrel 1. The second electrode 5 includes a first tube 51 and a second tube 52, which are coaxially connected. At least a portion of the structure of the first tube 51 is located outside the first receiving cavity 1a, and the second tube 52 is located inside the first receiving cavity 1a. The first tube 51 and the second tube 52 respectively abut against the two sides of the annular boss 1d, so that the second electrode 5 is fixed to the pen barrel 1. The second electrode 5 configured in this way has a simple structure and is convenient for the assembly of the electronic pen. Exemplarily, the first tube 51 and the second tube 52 can be detachably connected to facilitate the assembly and disassembly of the second electrode 5, such as by threaded connection, snap-fit, etc. Of course, in some embodiments not shown, the first tube 51 and the second tube 52 can also be fixedly connected, such as by pressing, or the first tube 51 and the second tube 52 can be integrally formed.
[0040] In some embodiments, as shown in Figures 2 and 3, the first tube 51 includes a straight portion 511 and a tapered portion 512. The straight portion 511 passes through an opening 1b into the first receiving cavity 1a, and the tapered portion 512 is located outside the first receiving cavity 1a. The second tube 52 is located inside the first receiving cavity 1a and is detachably connected to the straight portion 511.
[0041] Specifically, in some embodiments, along the first direction X, the cross-sectional shape of the straight portion 511 is the same as the shape of the opening 1b of the pen barrel 1, and along the second direction Y, the size of the straight portion 511 matches the size of the opening 1b to ensure structural stability and prevent component wobbling. For example, the opening 1b of the pen barrel 1 is circular, the straight portion 511 is cylindrical, and the outer diameter of the straight portion 511 is the same as the inner diameter of the opening 1b.
[0042] Furthermore, the radial dimension of the tapered portion 512 gradually decreases in the direction away from the straight portion 511. The junction of the straight portion 511 and the tapered portion 512 forms an annular abutment surface, which abuts against the outer surface of the annular boss 1d. The end face of the second tube 52 near the end of the first tube 51 abuts against the inner surface of the annular boss 1d.
[0043] Furthermore, in some embodiments, along the second direction Y, the size of the second tube 52 is larger than the size of the straight portion 511, and the second tube 52 is coaxially sleeved on the outside of the straight portion 511. Exemplarily, the connection between the second tube 52 and the straight portion 511 can be threaded, snap-fit, or otherwise. Exemplarily, the second tube 52 includes a smoothly connected large-diameter portion 521 and a small-diameter portion 522. The small-diameter portion 522 is sleeved on the outside of the straight portion 511 and abuts against the inner surface of the annular boss 1d; the large-diameter portion 521 is located on the side of the small-diameter portion 522 away from the annular boss 1d.
[0044] Understandably, the first tube 51 and the second tube 52 are coaxially arranged and have a through hole formed along the axial direction, through which the first electrode 4 is inserted. The second tube 52 adopts a configuration of a large-diameter section and a small-diameter section, which increases the radial dimension of the through hole, facilitates the arrangement of the first electrode 4, and ensures that the first electrode 4 and the second electrode 5 can be arranged at intervals.
[0045] For example, the pen barrel 1 has a first tapered section 1c on the side near the opening 1b. Correspondingly, the end of the small diameter portion 522 near the annular boss 1d can also be conical to match the inner wall shape of the first tapered section 1c and improve the stability of the structure.
[0046] Further, in some embodiments, as shown in FIG2, the pen tip 2 includes a conductive element 21 and a pen tip shell 22. One end of the conductive element 21 is connected to the pen tip shell 22, and the other end is detachably connected to the first electrode 4. Specifically, the conductive element 21 is a metal component, and the pen tip shell 22 is an insulating component. The pen tip shell 22 has an annular groove 221 on the side facing the pen barrel 1. The annular groove 221 extends circumferentially around the conductive element 21 and is spaced apart from the conductive element 21. The second electrode 5 is sleeved on the outside of the conductive element 21, that is, the first tube 51 and the second tube 52 are sleeved on the outside of the conductive element 21. At least a portion of the structure of the second electrode 5 is embedded in the annular groove 221, specifically, at least a portion of the structure of the first tube 51 is embedded in the annular groove 221, so as to be spaced apart from the conductive element 21. In this embodiment, at least a portion of the structure of the second electrode 5 is embedded in the annular groove 221, which acts as a radial limit for the second electrode 5, thereby isolating the second electrode 5 from the conductive member 21 and the first electrode 4 connected to the conductive member 21.
[0047] For example, the first tube 51 includes the aforementioned straight portion 511 and tapered portion 512. The straight portion 511 is connected to the second tube 52, and the tapered portion 512 is located between the pen tip shell 22 and the pen barrel 1. At least a portion of the structure of the tapered portion 512 is embedded in the annular groove 221. Accordingly, the annular groove 221 is a tapered groove, and its radial dimension gradually decreases in the direction away from the second electrode 5.
[0048] For example, the conductive element 21 and the first electrode 4 can be connected by a thread, a snap-fit, etc.
[0049] For example, the conductive element 21 can be a solid metal part, and the conductive element 21 includes a ball head 211 and a rod 212 connected together. At least a portion of the structure of the ball head 211 and the rod 212 is embedded within the pen tip housing 22, and the rod 212 passes through the first receiving cavity 1a and is detachably connected to the first electrode 4. The pen tip housing 22 can be a plastic part, and the pen tip housing 22 can be obtained by injection molding. The pen tip housing 22 can be injection molded on the outside of the ball head 211 and the rod 212. To ensure the connection strength between the conductive element 21 and the pen tip housing 22, a concave-convex structure can be provided at the connection point between the conductive element 21 and the pen tip housing 22.
[0050] In some embodiments, the electronic pen further includes a support structure that passes through the first receiving cavity 1a and is fixedly connected to the pen barrel 1. The first electrode 4 is connected to the support structure and is fixedly disposed in the first receiving cavity 1a.
[0051] The support structure includes a first support member 3, which is located within a first receiving cavity 1a. The first support member 3 has a second receiving cavity 30 communicating with the first receiving cavity 1a. At least a portion of the structure of the first electrode 4 and at least a portion of the structure of the second electrode 5 are disposed within the second receiving cavity 30. Specifically, at least a portion of the structure of the second tube body 52 of the second electrode 5 is located within the second receiving cavity 30.
[0052] Furthermore, the electronic pen also includes an insulating ring 6, which is disposed within the second receiving cavity 30 and sleeved on the outside of the second tube 52 to isolate the first support member 3 and the second tube 52. The insulating ring 6 between the first support member 3 and the second tube 52 ensures that the second electrode 5 always maintains a distance from the first support member 3, thus guaranteeing the overall structural safety.
[0053] In some embodiments, the first support member 3 is generally cylindrical, and the first support member 3, the insulating ring 6, the first electrode 4, and the second electrode 5 are coaxially arranged to ensure the safety and reliability of the structure. Preferably, the first support member 3, the insulating ring 6, the first electrode 4, and the second electrode 5 are coaxially arranged with the pen tip 2 and the pen barrel 1, and the axial direction of each component is the first direction X, and the radial direction is the second direction Y.
[0054] In some embodiments, the insulating ring 6 is connected to the first support member 3 to ensure the stability of their relative positions. The insulating ring 6 and the first support member 3 can be either fixedly connected or detachably connected.
[0055] Preferably, the insulating ring 6 is detachably connected to the first support member 3. For example, as shown in FIG7, the insulating ring 6 includes a first ring body portion 61 and a flange portion 62 disposed at one axial end of the first ring body portion 61. A recessed platform 34 is formed at the end of the first support member 3 away from the second electrode 5. The first ring body portion 61 passes through the second receiving cavity 30 of the first support member 3, and the flange portion 62 abuts against the recessed platform 34.
[0056] For example, as shown in Figures 5 and 6, the first support member 3 includes a second tapered segment 31, a main body segment 32, and a connecting segment 33 connected sequentially along the axial direction. The second tapered segment 31 is cone-shaped to fit the inner wall of the first tapered segment 1c of the pen barrel 1 for easy installation. The main body segment 32 has a cylindrical structure, and the second tapered segment 31 and the main body segment 32 together form the second receiving cavity 30. The connecting segment 33 is disposed on the outer periphery of the main body segment 32 and extends in a direction away from the second tapered segment 31; the connecting segment 33 and the main body segment 32 together form the recessed platform 34.
[0057] In some embodiments, the electronic pen further includes a third electrode disposed on the insulating ring 6 and spaced apart from the second tube 52. The third electrode can enhance the signal function of the first electrode 4 or the second electrode 5, thereby further improving the functionality and performance of the electronic pen. The present invention does not specifically limit the position of the third electrode on the insulating ring 6, as long as it is spaced apart from the second electrode 5 and serves to enhance the signal. Exemplarily, the third electrode can be integrated onto the insulating ring by electroplating or other methods.
[0058] Furthermore, the aforementioned support structure also includes a third tube 7 and a second support member 8. The third tube 7 is located within the first receiving cavity 1a and is fixedly connected to the end of the first support member 3 furthest from the pen tip 2. The third tube 7 has a third receiving cavity 70 communicating with the second receiving cavity 30. The second support member 8 is located within the third receiving cavity 70 and is connected to the third tube 7. At least a portion of the structure of the first electrode 4 is located within the third receiving cavity 70 and connected to the second support member 8, and at least a portion of the structure of the first electrode 4 extends into the second receiving cavity 30. The third tube 7 is connected to the pen barrel 1, such as by snap-fitting, welding, or bolting. It is understood that the first support member 3 and the third tube 7 are sequentially arranged along the first direction X, and the first support member 3 is located at the end of the pen barrel 1 closest to the pen tip 2.
[0059] This application does not specifically limit the fixing connection method between the third tube 7 and the first support member 3. The third tube 7 and the first support member 3 can be connected by snap-fit, adhesive bonding, or welding. For example, the first support member 3 includes the aforementioned connecting section 33, and at least one slot 331 is provided on the outer periphery of the connecting section 33. Correspondingly, the third tube 7 and the first support member 3 are coaxially arranged, and at least one locking block 71 protrudes from the side of the third tube 7 closest to the first support member 3, and the locking block 71 engages within the slot 331. The slot 331 and the locking block 71 prevent relative rotation or radial movement between the third tube 7 and the first support member 3, ensuring a stable relative position for each structure within the third tube 7 and the first support member 3, thereby improving the safety and reliability of the overall structure.
[0060] In some embodiments, the second support member 8 has a mounting groove 811, and at least a portion of the structure of the first electrode 4 is located within the mounting groove 811. Specifically, the first electrode 4 includes a first connecting portion 41 and a fixing portion 42 connected sequentially along a first direction X, wherein the first connecting portion 41 is detachably connected to the pen tip 2, specifically to the conductive member 21 of the pen tip 2. Exemplarily, a countersunk hole 411 is provided on the side of the first connecting portion 41 facing the conductive member 21, and the conductive member 21 can be bolted to the countersunk hole 411 or snapped into the countersunk hole 411. The fixing portion 42 is located within the mounting groove 811 and is fixedly connected to the second support member 8.
[0061] The second support member 8 can be directly connected to the third tube 7, or connected through the bracket 72.
[0062] For example, as shown in FIG9, the third tube 7 further includes a bracket 72, which is located within the third receiving cavity 70 and connected between the third tube 7 and the second support member 8. Specifically, the bracket 72 is located on the side of the third tube 7 and the second support member 8 closer to the first support member 3. The bracket 72 includes a second annular portion 721 and a second connecting portion 722 connected together. The second annular portion 721 is located between the second support member 8 and the first support member 3. The fixing portion 42 of the first electrode 4 is fixed in the mounting groove 811 of the second support member 8, and the first connecting portion 41 passes through the central hole of the second annular portion 721 into the first support member 3, i.e., into the second receiving cavity 30. The second connecting portion 722 is connected to one radial side of the second annular portion 721 and extends along the first direction X. The second connecting portion 722 is connected to the inner wall of the third tube 7. For example, the second connecting portion 722 may be in the shape of an arc plate and adapted to the curved surface of the inner wall of the third tube 7. For example, the second connecting part 722 may be welded or bolted to the third pipe body 7.
[0063] In some embodiments, the electronic pen further includes a main board component 9 and a plurality of connectors 10. The main board component 9 is located on the side of the first electrode 4 away from the bottom wall of the mounting groove 811, i.e., above the mounting groove 811. The main board component 9 is electrically connected to both the first electrode 4 and the second electrode 5. The plurality of connectors 10 penetrate the second support member 8, the first electrode 4, and the main board component 9 along the second direction Y to fix the second support member 8, the first electrode 4, and the main board component 9 together. The connectors 10 are electrically connected to the grounding terminal of the main board component 9. In this embodiment, the connectors 10 not only fix the main board component 9, the first electrode 4, and the second support member 8 together, improving the overall integrity and stability of the electronic pen structure, but also serve a grounding function. Understandably, in some embodiments, the electronic pen includes a third electrode, which is also electrically connected to the main board component 9.
[0064] This invention does not impose specific limitations on the connection method between the first electrode 4, the second electrode 5, the third electrode and the main board component 9, as long as the electrical connection function can be achieved. Taking the electrical connection between the second electrode 5 and the main board component 9 as an example, a metal elastic element can be used, which is compressed and held between the main board component 9 and the second electrode 5 to achieve the electrical connection between the second electrode 5 and the main board component 9.
[0065] Furthermore, in some embodiments, the electronic pen further includes a first insulating member 11 and a second insulating member 12. The first insulating member 11 is disposed within the mounting groove 811 and located between the first electrode 4 and the second support member 8, with the first electrode 4 insulated from the second support member 8 by the first insulating member 11. The second insulating member 12 is located between the first electrode 4 and the main board component 9, with the first electrode 4 insulated from the main board component 9 by the second insulating member 12, and the second insulating member 12 also serves to support the main board component 9 and strengthen the structure.
[0066] In some embodiments, along the second direction Y, the main board component 9, the second insulating component 12, the first electrode 4, the first insulating component 11, and the second support component 8 are sequentially stacked. The second support component 8, the first insulating component 11, the first electrode 4, the second insulating component 12, and the main board component 9 together form multiple connection holes, and multiple connectors 10 are respectively disposed within the multiple connection holes.
[0067] As shown in Figures 4, 9 and 10, the connection hole includes a first connection hole 812, a second connection hole 421 and a third connection hole 110. The first connection hole 812 is formed in the second support member 8, specifically on the bottom wall of the mounting groove 811. The second connection hole 421 is formed in the first electrode 4 and the third connection hole 110 is formed in the first insulating member 11.
[0068] Exemplarily, the second support member 8 has a first annular protrusion 813 extending around the first connecting hole 812. The first annular protrusion 813 extends toward the second connecting hole 421, and the connector 10 is connected to the first annular protrusion 813 to achieve grounding. Exemplarily, the connector 10 and the first annular protrusion 813 can be threaded, snap-fitted, or otherwise connected. The first insulating member 11 has a second annular protrusion 111 extending around the third connecting hole 110. The second annular protrusion 111 extends toward the second connecting hole 421 and surrounds the outside of the first annular protrusion 813. The second annular protrusion 111 blocks the space between the inner wall of the second connecting hole 421 and the first annular protrusion 813 to prevent the second support member 8 from contacting the first electrode 4.
[0069] For example, at least a portion of the structure of the first annular boss 1d and the second annular protrusion 111 is embedded in the second connecting hole 421. The second annular boss 1d is disposed between the second connecting hole 421 and the first annular boss 1d, and the second annular boss 1d abuts against the inner wall of the second connecting hole 421 to position the first electrode 4.
[0070] Furthermore, in some embodiments, the electronic pen also includes a sensor 13, which is located within the third receiving cavity 70 and is connected to the third tube 7 and the second support member 8, respectively. The sensor 13 is connected to the first electrode 4 via the second support member 8 to sense the force transmitted by the first electrode 4; and the sensor 13 is electrically connected to the motherboard. When the electronic pen is writing, the pen tip 2 is connected to the first electrode 4, and the first electrode 4 is connected to the sensor 13 via the second support member 8. The pen tip 2 transmits the force it receives to the sensor 13 via the first electrode 4. The sensor 13 senses the force information transmitted by the first electrode 4 and then transmits the sensed information to the motherboard 9 connected to it, where the motherboard 9 processes the information. Specifically, a third connecting portion 814 is provided on the side of the second support member 8 away from the first support member 3. The sensor 13 is mounted to the second support member 8 via this third connecting portion 814, resulting in a simple structure and low manufacturing difficulty.
[0071] For example, the sensing element 13 includes a deformation portion 131 and a sensing portion 132. The deformation portion 131 includes an overlapping section 1311 and a deformable section 1312 connected together. The overlapping section 1311 extends along a first direction X and is fixedly connected to the second support member 8. Specifically, it can be connected to the third connecting portion 814 of the second support member 8 by means of bolts, clips, etc., so that the first electrode 4 can transmit the force to the overlapping section 1311 through the second support member 8. The deformable section 1312 is intersecting with the overlapping section 1311. Preferably, the deformable section 1312 extends along a second direction Y, and the end of the deformable section 1312 away from the overlapping section 1311 is connected to the third tube body 7. The first electrode 4 transmits the force to the deformable section 1312 through the second support member 8 and the overlapping section 1311, so that the deformable section 1312 deforms. Essentially, one side of the deformable segment 1312 is connected to the overlapping segment 1311, and the other side is connected to the third tube 7. When the overlapping segment 1311 receives a force from the second support member 8, it transmits that force to the deformable segment 1312, causing the deformable segment 1312 to deform. Simultaneously, a sensing element 132 is connected to the deformable segment 1312. The sensing element 132 can be a strain gauge, typically attached to the deformable segment 1312. The sensing element 132 deforms along with the deformable segment 1312. It is usually made of a sensitive material, such as a thin film or metal foil. When subjected to external force, the sensing element 132 deforms accordingly, causing changes in its resistance, capacitance, or inductance. The sensing element 132 senses the force information acting on the deformable segment 1312 and then converts it into an electrical signal, which is transmitted to the main board component 9 for processing.
[0072] More specifically, the sensing element 13 can be connected to the third tube 7 by welding, bonding, or abutting, or the sensing element 13 can be integrally formed with the third tube 7. Preferably, the sensing element 13 and the third tube 7 are integrally formed, which ensures high connection reliability and simplifies the manufacturing process of the electronic pen, thereby improving production efficiency. More specifically, the aforementioned deformable portion 131 of the sensing element 13 is integrally formed with the third tube 7, and the sensing portion 132 is connected to the deformed section 1312 of the deformable portion 131.
[0073] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. An electronic pen, characterized in that, include: The pen barrel (1) has a first receiving cavity (1a), and one end of the pen barrel (1) has an opening (1b) that communicates with the first receiving cavity (1a). The pen tip (2) is located on one side of the opening (1b); The first electrode (4) is inserted into the first receiving cavity (1a); the pen tip (2) is detachably connected to the first electrode (4) through the opening (1b); The second electrode (5) is fixedly connected to the pen barrel (1), and at least part of its structure passes through the first receiving cavity (1a); the second electrode (5) is sleeved on the outside of the first electrode (4) and spaced apart from the first electrode (4).
2. The electronic pen according to claim 1, characterized in that, The pen tip (2) includes a conductor (21) and a pen tip shell (22). One end of the conductor (21) is connected to the pen tip shell (22), and the other end is detachably connected to the first electrode (4). The pen tip shell (22) has an annular groove (221) on the side facing the pen barrel (1). The annular groove (221) extends circumferentially around the conductor (21) and is spaced apart from the conductor (21). The second electrode (5) is sleeved on the outside of the conductive member (21), and at least a portion of the structure of the second electrode (5) is embedded in the annular groove (221) to be spaced apart from the conductive member (21).
3. The electronic pen according to claim 1, characterized in that, An annular boss (1d) is formed at the opening (1b) of the pen barrel (1); The second electrode (5) includes a first tube (51) and a second tube (52), the first tube (51) and the second tube (52) being coaxially connected; at least a portion of the structure of the first tube (51) is located outside the first receiving cavity (1a), and the second tube (52) is located inside the first receiving cavity (1a); the first tube (51) and the second tube (52) respectively abut against the two sides of the annular boss (1d) to be fixed to the pen barrel (1).
4. The electronic pen according to claim 3, characterized in that, The electronic pen also includes: A first support member (3) is located within the first receiving cavity (1a); the first support member (3) has a second receiving cavity (30) communicating with the first receiving cavity (1a), and at least a portion of the structure of the second tube (52) is located within the second receiving cavity (30); An insulating ring (6) is disposed in the second receiving cavity (30) and sleeved on the outside of the second tube body (52) to isolate the first support member (3) and the second tube body (52).
5. The electronic pen according to claim 4, characterized in that, The electronic pen also includes a third electrode, which is disposed on the insulating ring (6) and spaced apart from the second tube (52).
6. The electronic pen according to any one of claims 1-5, characterized in that, The electronic pen also includes: A first support member (3) is located within the first receiving cavity (1a); the first support member (3) has a second receiving cavity (30) communicating with the first receiving cavity (1a); The third tube (7) is located inside the first receiving cavity (1a) and is fixedly connected to the end of the first support member (3) away from the pen tip (2); the third tube (7) has a third receiving cavity (70) communicating with the second receiving cavity (30); The second support member (8) is located in the third receiving cavity (70) and connected to the third tube body (7); at least a portion of the structure of the first electrode (4) is located in the third receiving cavity (70) and connected to the second support member (8).
7. The electronic pen according to claim 6, characterized in that, The second support member (8) has a mounting groove (811) in which at least a portion of the structure of the first electrode (4) is located; The electronic pen also includes: The main board component (9) is located on the side of the first electrode (4) away from the bottom wall of the mounting groove (811); the main board component (9) is electrically connected to the first electrode (4) and the second electrode (5); Multiple connectors (10) pass through the second support member (8), the first electrode (4) and the main board member (9) to fix the second support member (8), the first electrode (4) and the main board member (9) together; the connectors (10) are electrically connected to the grounding terminal of the main board member (9).
8. The electronic pen according to claim 7, characterized in that, The electronic pen also includes: The first insulating member (11) is disposed in the mounting groove (811) and located between the first electrode (4) and the second support member (8); The second insulating element (12) is located between the first electrode (4) and the main board component (9).
9. The electronic pen according to claim 8, characterized in that, The second support member (8), the first insulating member (11), the first electrode (4), the second insulating member (12) and the main board member (9) together form a plurality of connection holes, and the plurality of connection members (10) are respectively disposed in the plurality of connection holes; The connection hole includes a first connection hole (812) and a second connection hole (421), the first connection hole (812) being formed in the second support member (8) and the second connection hole (421) being formed in the first electrode (4); The second support member (8) is provided with a first annular protrusion (813) extending around the first connecting hole (812), the first annular protrusion (813) extending toward the second connecting hole (421); the connector (10) is connected inside the first annular protrusion (813); the first insulating member (11) is provided with a second annular protrusion (111), the second annular protrusion (111) extending toward the second connecting hole (421) and surrounding the outside of the first annular protrusion (813).
10. The electronic pen according to claim 7, characterized in that, The electronic pen also includes a sensor (13), which is located in the third receiving cavity (70) and is connected to the third tube (7) and the second support (8) respectively. The sensor (13) is connected to the first electrode (4) through the second support (8) to sense the force transmitted by the first electrode (4). The sensor (13) is also electrically connected to the main board (9).
11. The electronic pen according to claim 10, characterized in that, The sensing element (13) and the third tube (7) are integrally formed.
12. The electronic pen according to claim 10 or 11, characterized in that, The sensing element (13) includes: The deformation section (131) includes an overlapping section (1311) and a deformable section (1312) connected to each other. The overlapping section (1311) and the deformable section (1312) are intersecting each other. The overlapping section (1311) is fixedly connected to the second support member (8). One end of the deformable section (1312) away from the overlapping section (1311) is connected to the third tube body (7). The first electrode (4) transmits force to the deformable section (1312) through the second support member (8) and the overlapping section (1311) so that the deformable section (1312) deforms. A sensing unit (132) is connected to the deformable segment (1312) and is used to sense the force information acting on the deformable segment (1312).