Refill module and capacitive stylus using the same
By designing a fixing component that includes a positioning part and a support part in the capacitive stylus, the problem of pen tip wobbling is solved, achieving stable writing of the pen tip module and protection of the pressure sensor, thus improving the writing experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EMRIGHT TECH CO LTD
- Filing Date
- 2025-01-13
- Publication Date
- 2026-06-05
AI Technical Summary
The pen tip of a traditional stylus tends to wobble inside the pen barrel, causing instability in the pressure sensor structure and affecting the writing experience.
Design a pen refill module comprising a pen refill component, a fixing component, and a pressure sensor. The pen refill is fixed by the fixing component through a positioning part and a support part. The support part is designed as a thin sheet structure and is embedded in the inner wall of a capacitive stylus. The deformation of the support part is sensed to generate a pressure-sensitive signal.
It effectively reduces pen tip wobble, improves the overall rigidity of the pen tip module, prevents the pressure sensor from being damaged during writing, and provides a stable writing experience.
Smart Images
Figure CN122152142A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of capacitive styluses, and in particular to a pen tip module capable of detecting pen tip pressure and a capacitive stylus using the pen tip module. Background Technology
[0002] As described in US Patent 10,768,7205, a conventional stylus includes a pen tube, a refill, a spring, and a pressure sensor. The bottom of the pen tube has a slot to accommodate the pressure sensor; the walls of the slot provide support for the pressure sensor. The refill is disposed within the pen tube in a relatively movable manner. The front end of the refill protrudes from the pen tube, while the rear end is located within the pen tube and abuts against the pressure sensor. The spring surrounds the refill and is also disposed within the pen tube. When a user writes with a conventional stylus, the refill directly applies pressure to the pressure sensor, compressing the spring. The pressure sensor receives the pressure from the refill and generates a pressure value, which is used to determine the writing action. When the user is not writing, the spring relaxes, creating a gap between the refill and the pressure sensor, causing the pressure value generated by the pressure sensor to disappear, thus indicating that the stylus has not been used for writing. However, traditional styluses require sufficient freedom at the back of the pen tip to allow it to contact the pressure sensor. This structural configuration makes the pen tip prone to excessive movement within the pen tube. Therefore, designing a stylus that can effectively prevent the pen tip from shaking within the pen tube is one of the development goals of the design industry. Summary of the Invention
[0003] The present invention provides a pen tip module that can detect pen tip pressure and a capacitive stylus using the pen tip module to solve the above-mentioned problems.
[0004] The scope of this patent application discloses a pen refill module for use in a capacitive stylus. The pen refill module includes a pen refill component, a fixing component, and a pressure sensor. The pen refill component includes a non-conductive portion and a conductive portion connected together. The fixing component is disposed at one end of the conductive portion opposite to the non-conductive portion. The fixing component has a positioning portion and a supporting portion connected together. The conductive portion is installed within the positioning portion, and the supporting portion is connected to the inner wall of the capacitive stylus. The pressure sensor and the positioning portion are respectively disposed at two opposite positions on the supporting portion to sense the amount of deformation of the supporting portion.
[0005] The scope of this patent application also discloses a capacitive stylus using a pen tip module, comprising a pen tube, a circuit board, a power storage component, and a pen tip module. The circuit board is disposed within the pen tube and includes a controller. The power storage component is disposed within the pen tube to supply electrical energy to the circuit board. The pen tip module is detachably mounted on the pen tube. The pen tip module includes a pen tip component, a fixing member, and a pressure sensor. The pen tip component includes a non-conductive portion and a conductive portion connected together. The fixing member is disposed at one end of the conductive portion opposite to the non-conductive portion. The fixing member has a positioning portion and a support portion connected together. The conductive portion is mounted within the positioning portion, and the support portion is connected to the inner wall of the capacitive stylus. The pressure sensor and the positioning portion are respectively disposed at two opposite positions on the support portion to sense the deformation of the support portion.
[0006] The capacitive stylus of this invention adds a fixing member comprising a positioning part and a support part to the pen refill module. The positioning part supports the pen refill, while the support part is designed as a thin sheet structure and placed between the pen refill and the pressure sensor. Therefore, the pressure sensor is used to sense the deformation of the support part (thin sheet structure) to generate a pressure signal. At least one side of the support part can be disposed on the inner wall of the capacitive stylus by means of fitting, adhesive application, or assembly, which can significantly reduce the wobbling of the pen refill during writing. The fitting of at least one side of the support part into the inner wall can improve the overall rigidity of the fixing member, preventing the pressure sensor from being damaged when the user writes forcefully with the capacitive stylus. Furthermore, the pen refill, fixing member, and pressure sensor can be modularly designed, allowing the user to install the pen refill module into any pen tube according to actual needs. Attached Figure Description
[0007] Figure 1 This is a simplified structural diagram of the capacitive stylus according to an embodiment of the present invention.
[0008] Figure 2 This is a simplified structural diagram of the pen refill module according to an embodiment of the present invention.
[0009] Explanation of symbols in the attached diagram: 10: Capacitive stylus; 12: Pen tube; 14: Internal support; 16: Circuit board; 18: Energy storage components; 20: Pen refill module; 22: Pen refill components; 24: Fasteners; 26: Pressure sensor; 28: First signal line; 30: Second signal line; 32: Support frame; 34: Sensors; 36: Non-conductive part; 38: Conductive part; 40: Positioning section; 42: Support section; 44: Inner wall. Detailed Implementation
[0010] Please see Figure 1 , Figure 1 This is a simplified structural diagram of a capacitive stylus 10 according to an embodiment of the present invention. The capacitive stylus 10 may include a pen tube 12, an inner support 14, a circuit board 16, a power storage component 18, and a pen tip module 20. The pen tube 12 is the outer shell of the capacitive stylus 10 and can be made of plastic or metal, with the material and color depending on design requirements. The inner support 14 is mounted on the pen tube 12 and is used to connect other components of the capacitive stylus 10. The circuit board 16, the power storage component 18, and the pen tip module 20 can be disposed inside the pen tube 12 through the inner support 14. The power storage component 18 is used to supply electrical energy to the circuit board 16, enabling the controller (not shown in the figure) of the circuit board 16 to receive and analyze the electronic signals generated by the pen tip module 20, and then selectively use a wireless communication module (not shown in the figure) to transmit relevant information to an external electronic device.
[0011] Please see Figure 2 , Figure 2 This is a simplified structural diagram of the pen refill module 20 according to an embodiment of the present invention. The pen refill module 20 is preferably detachably installed within the pen tube 12 and includes a pen refill component 22, a fixing member 24, a pressure sensor 26, a first signal line 28, and a second signal line 30. The inner support 14 may have a support frame 32 and a sensing element 34 near the pen refill module 20. The pen refill component 22 is disposed within the sensing element 34 in a relatively movable manner and includes a non-conductive portion 36 and a conductive portion 38 connected to each other. The non-conductive portion 36 may be made of plastic and protrudes from the pen tube 12 beyond the sensing element 34. The conductive portion 38 is typically made of metal and is partially embedded within the non-conductive portion 36; the main body of the conductive portion 38 corresponds to the location of the support frame 32 and the sensing element 34.
[0012] In a specific embodiment of the present invention, the conductive part 38 and the non-conductive part 36 can be any combination structure, that is, the conductive part 38 and the non-conductive part 36 of the present invention can be a non-integral structure. For example, the present invention can combine or replace the conductive part 38 and the non-conductive part 36 by means of interlocking structure, screwing structure, concave-convex structure, etc. The present invention is not limited thereto. When the capacitive stylus 10 of the present invention wears out due to contact with an external device through the non-conductive part 36, the capacitive stylus 10 of the present invention can be easily replaced by combining or replacing the non-conductive part 36.
[0013] The fixing member 24 is disposed at one end of the conductive portion 38 relative to the non-conductive portion 36, and includes a positioning portion 40 and a support portion 42 connected thereto. This end of the conductive portion 38 relative to the non-conductive portion 36 is mounted within the positioning portion 40. The support portion 42 is connected to the inner wall 44 of the capacitive stylus 10; for example, at least two sides of the support portion 42 are fitted into the inner wall 44. Furthermore, the fixing member 24 is preferably made of a conductive material, and the support portion 42 is designed as a thin sheet structure, allowing it to deform structurally as the pen tip module 20 moves relative to the pen tube 12.
[0014] The pressure sensor 26 is disposed on the surface of the support portion 42 relative to the positioning portion 40, meaning that it and the positioning portion 40 are respectively disposed at two opposite positions on the support portion 42. The support portion 42, which is designed as a thin sheet structure, senses the amount of deformation caused by the pressure of the pen refill module 20. In other words, in the prior art, when writing, the spring is compressed to cause the pressure sensor to transmit a signal. When not writing, the spring releases the pressure, causing the pen refill to separate from the pressure sensor and the signal transmitted by the pressure sensor disappears. In the present invention, when writing, the support portion 42 (designed as a thin sheet structure) is deformed by the pressure applied by the pen refill 22. The pressure sensor 26, which is attached to the surface of the support portion 42 relative to the positioning portion 40, will sense the amount of deformation of the thin sheet structure support portion 42 and transmit a signal. When not writing, the support portion 42 is not subjected to pressure from the pen refill 22, so the thin sheet structure support portion 42 will not have any deformation, and the pressure sensor 26 will cause the signal to disappear. Therefore, in one specific embodiment of the present invention, the first signal line 28 can be electrically connected to the support portion 42 to conduct electronic signals received by contact sensing with an external device via the conductive portion 38 and the fixing member 24, but the present invention is not limited thereto; in another specific embodiment of the present invention, the second signal line 30 can be electrically connected to the sensing member 34 to conduct electronic signals received by contact sensing with an external device via the sensing member 34, and the present invention is also not limited thereto; in one specific embodiment of the present invention, the pressure sensor 26 can be electrically connected to the controller (not shown) of the circuit board 16 via a flexible flat cable to conduct electronic signals generated by the pressure sensor 26, which is only an example and not a limitation of the present invention.
[0015] In summary, the capacitive stylus 10 of the present invention adds a fixing member 24, including a positioning part 40 and a support part 42, to the pen refill module 20. The positioning part 40 supports the pen refill 22, and the support part 42 is designed as a thin sheet structure and placed between the pen refill 22 and the pressure sensor 26. Therefore, the pressure sensor 26 is used to sense the deformation of the support part 42 (thin sheet structure) to generate a pressure signal. At least one side of the support part can be respectively set on the inner wall of the capacitive stylus 10 by means of fitting, dispensing, or assembly, which can significantly reduce the shaking of the pen refill 22 during writing. The two sides of the support part 42 fitting into the inner wall can improve the overall rigidity of the fixing member 24 and prevent the pressure sensor from being crushed when the user operates the capacitive stylus 10 to write with force. In addition, the pen refill 22, the fixing member 24, and the pressure sensor 26 can be modularly designed, allowing the user to install the pen refill module 20 into any pen tube according to actual needs.
[0016] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included in the scope of the present invention.
Claims
1. A pen tip module, applied to a capacitive stylus, characterized in that, The pen refill module includes: A pen core component includes a non-conductive part and a conductive part connected together; A fixing member is disposed at one end of the conductive part relative to the non-conductive part. The fixing member has a positioning part and a supporting part connected to each other. The conductive part is installed in the positioning part, and the supporting part is connected to an inner wall of the capacitive stylus. A pressure sensor and the positioning part are respectively set at two opposite positions on the support part to sense a deformation of the support part.
2. The pen refill module according to claim 1, characterized in that, The fastener is made of conductive material.
3. The pen refill module according to claim 1, characterized in that, The support is a thin sheet structure that deforms when the pen refill module is subjected to an external force.
4. The pen refill module according to claim 1, characterized in that, At least one side of the support is fitted into the inner wall.
5. The pen refill module according to claim 1, characterized in that, The pen refill module also includes a first signal line, which is electrically connected to the support portion to transmit an electronic signal received by the conductive portion and the fixing member in contact with an external device.
6. The pen refill module according to claim 1, characterized in that, The pen tip module also includes a second signal line, which is electrically connected to a sensor of the capacitive stylus to transmit an electronic signal received by the sensor in contact with an external device.
7. The pen refill module according to claim 1, characterized in that, The pen tip module is detachably mounted on the pen tube of the capacitive stylus.
8. The pen refill module according to claim 1, characterized in that, The conductive part and the non-conductive part are not integral structures; the conductive part and the non-conductive part are combined through interlocking, screwing, or concave-convex structures.
9. A capacitive stylus using a pen tip module, characterized in that, Includes: A pen tube; A circuit board is disposed inside the pen tube, and the circuit board is equipped with a controller. An energy storage component is disposed within the pen tube to supply electrical energy to the circuit board; and A refill module, detachably mounted on the pen tube, the refill module comprising: A pen core component includes a non-conductive part and a conductive part connected together; A fixing member is disposed at one end of the conductive part relative to the non-conductive part. The fixing member has a positioning part and a supporting part connected to each other. The conductive part is installed in the positioning part, and the supporting part is connected to an inner wall of the capacitive stylus. A pressure sensor and the positioning part are respectively set at two opposite positions on the support part to sense a deformation of the support part.
10. The capacitive stylus according to claim 9, characterized in that, The fastener is made of conductive material.
11. The capacitive stylus according to claim 9, characterized in that, The support is a thin sheet structure that deforms when the pen refill module is subjected to external force.
12. The capacitive stylus according to claim 9, characterized in that, At least one side of the support is fitted into the inner wall.
13. The capacitive stylus according to claim 9, characterized in that, The pen refill module also includes a first signal line, which is electrically connected to the support portion to transmit an electronic signal received by the conductive portion and the fixing member in contact with an external device.
14. The capacitive stylus according to claim 9, characterized in that, The pen tip module also includes a second signal line, which is electrically connected to a sensor of the capacitive stylus to transmit an electronic signal received by the sensor in contact with an external device.
15. The capacitive stylus according to claim 9, characterized in that, The conductive part and the non-conductive part are not integral structures; the conductive part and the non-conductive part are combined through a fitting structure, a screw structure, or a concave-convex structure.