Pressure-sensitive electronic pen based on a stylus module
By designing an adapter board and a conductive spring, the problem of inaccurate pressure sensing caused by direct soldering of the signal pins of the existing electronic pen tip module is solved, thus improving the writing pressure detection accuracy and user experience of the electronic pen.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN OCM TECH CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-21
AI Technical Summary
The signal pins of the existing electronic pen tip module are directly soldered to the control motherboard, which makes it impossible for the pressure-sensitive unit to accurately detect writing pressure, affecting the user experience.
An adapter board is used to connect the pen tip module and the control motherboard. Signal conduction is achieved through a conduction spring, and the detection sensitivity of writing pressure is improved through an overload spring and a preload spring. The writing pressure is transmitted to the pressure sensing unit through a pressure transmission component.
This ensures that signal conduction does not affect pressure transmission, thus improving the user's writing experience and the accuracy of writing pressure detection.
Smart Images
Figure CN224536478U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic pen technology, and in particular to a pressure-sensitive electronic pen based on a pen tip module. Background Technology
[0002] Currently, existing iPad active styluses, in order to achieve complex functions, have two TX (transmitter) channels and one GND (gender) channel on their pen tip module. The first TX channel is mainly responsible for basic positioning, simulating finger touch by transmitting a signal in phase with the screen. The second TX channel is mainly responsible for transmitting the pen's "status information" (pressure sensitivity, tilt, button presses, etc.), loading digital data onto a carrier wave through modulation technology and transmitting it, usually using a different frequency or phase to distinguish it from the first channel. The GND provides the basic circuit and reference level, and plays a crucial shielding role, ensuring that the two complex high-frequency signals can work stably and reliably in a small space without interfering with each other.
[0003] However, in existing electronic pens, the three signal pins of the pen tip module are directly soldered to the control motherboard. This connection method affects the accurate transmission of writing pressure from the pen tip module to the pressure-sensitive unit, causing the pressure-sensitive unit to be unable to accurately detect writing pressure and to accurately convert physical writing force into the expressiveness of digital creation (such as natural control of line thickness, physical simulation of ink density, haptic feedback closed loop, etc.), thus affecting the user experience. Utility Model Content
[0004] The technical problem to be solved by this utility model embodiment is to provide a pressure-sensitive electronic pen based on a pen tip module to improve the user experience.
[0005] To address the aforementioned technical problems, this utility model proposes a pressure-sensitive electronic pen based on a pen tip module, comprising a pen body, a pen tip module, a control motherboard, an overload spring, and a pressure-sensitive unit for detecting the writing pressure of the pen tip module. The pressure-sensitive unit is located at the rear end of the pen tip module. The pen tip module has an adapter plate with three contacts, which are respectively connected to the GND pin and two TX pins of the pen tip module. The pressure-sensitive electronic pen also includes three contact conductors electrically connected to the control motherboard, which are respectively connected to the three contacts. The overload spring is located behind the pressure-sensitive unit and acts on the pressure-sensitive unit.
[0006] Furthermore, a preload spring is provided inside the pen body, which acts on the pen tip module to apply a backward pressure to the pen tip module.
[0007] Furthermore, the pen body is equipped with a main support, and the main support is equipped with an overload protection part, which is spaced at a preset distance from the pen tip module.
[0008] Furthermore, the pressure-sensitive electronic pen also includes a pressure transmission element, through which the pen tip module transmits writing pressure to the pressure-sensitive unit.
[0009] Furthermore, the pen body is equipped with a mounting base and a mounting cover. The mounting cover encapsulates the pressure transmission component, pressure sensing unit, and overload spring from front to back within the mounting base.
[0010] Furthermore, the mounting base and the mounting cover are detachably connected, and the mounting base is detachably connected to the main bracket.
[0011] Furthermore, the fixing cover is provided with a positioning groove for fixing the contact conductor.
[0012] Furthermore, the contact conductor is a conducting spring, and the front end of the conducting spring maintains contact with the contact point.
[0013] Furthermore, the end of the conduction spring is soldered onto the control mainboard.
[0014] Furthermore, the three contacts are arranged in a triangular pattern.
[0015] The beneficial effects of this utility model are as follows: This utility model connects the pen tip module through an adapter plate, with three contacts reserved on the adapter plate. The contacts are then connected through a contact conductive component welded to the control motherboard, achieving signal conduction without affecting pressure transmission. The structure is simple, the cost is low, and the user experience is improved. Attached Figure Description
[0016] Figure 1 This is a front view of a pressure-sensitive electronic pen based on a pen tip module according to an embodiment of this utility model.
[0017] Figure 2 yes Figure 1 Sectional view at point CC.
[0018] Figure 3 yes Figure 2 Enlarged view of section I in the middle.
[0019] Figure 4 This is a top view of a pressure-sensitive electronic pen based on a pen tip module according to an embodiment of this utility model.
[0020] Figure 5 yes Figure 4 Sectional view at point DD.
[0021] Figure 6 yes Figure 5 Enlarged view of section II.
[0022] Figure 7 This is a perspective view of the front end structure of a pressure-sensitive electronic pen based on a pen tip module according to an embodiment of this utility model.
[0023] Figure 8 This is a perspective view of the front end of the pressure-sensitive electronic pen based on the pen tip module according to an embodiment of the present invention.
[0024] Figure 9 This is a partial structural diagram of the front end of the pressure-sensitive electronic pen based on the pen tip module according to an embodiment of this utility model.
[0025] Figure 10 This is a perspective view of the fixing cover according to an embodiment of the present utility model.
[0026] Figure 11 This is a perspective view of the fixing base according to an embodiment of the present utility model.
[0027] Figure 12 This is a perspective view of the pen tip module according to an embodiment of the present invention.
[0028] Explanation of icon numbers Pen tip module 1, control main board 2, overload spring 3, pressure sensing unit 4, contact conductor 5, adapter plate 6, pen body 7, preload spring 8, main bracket 9, overload protection part 10, pressure transmission part 11, fixing base 12, fixing cover 13, positioning groove 14. Detailed Implementation
[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] In this embodiment of the invention, directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicators will also change accordingly.
[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.
[0032] Please refer to Figures 1-12 The pressure-sensitive electronic pen based on the pen tip module in this embodiment of the utility model includes a pen body.
[0033] The pen body contains a pen tip module, a control board, an overload spring, a pressure-sensitive unit, and three contact conductors. The pen tip module is a standard component in this field. The pressure-sensitive unit consists of a circuit board and a pressure sensor soldered onto the circuit board. The pressure-sensitive unit is located at the rear end of the pen tip module and is used to detect the writing pressure of the pen tip module (i.e., the pressure applied when writing on the iPad).
[0034] An adapter plate is soldered onto the pen tip module. The adapter plate has three contacts, which are respectively connected to the GND pin and two TX pins of the pen tip module. Preferably, the three contacts are located on the side of the adapter plate facing the end of the pen body. Preferably, the three contacts are arranged in a triangular pattern, meaning the three conductive elements are also arranged in a triangular or ternary shape.
[0035] Three contact conductors are respectively in contact with three contacts. The contact conductors are preferably conductive springs, which are pre-compressed by the adapter plate (pre-compressed between the adapter plate and the fixed cover). Under the action of the spring's own elastic force, the front end of the conductive spring always maintains contact with the contacts. The end of the conductive spring extends and is soldered to the control main board.
[0036] An overload spring is located at the rear of the pressure-sensitive unit and acts on the pressure-sensitive unit, applying a forward force to the pressure-sensitive unit.
[0037] In one implementation, a pre-compression spring is provided inside the pen body. The pre-compression spring acts on the pen tip module, applying rearward pressure to the pen tip module. In a specific implementation, the pre-compression spring is mounted on the main support. The pre-compression spring ensures that the pen tip module is always in contact with the pressure-sensitive unit (or always in contact with the pressure-sensitive unit through a pressure transmission component), improving the sensitivity of the electronic pen's writing pressure detection, and also ensuring that the pen tip module remains in a stable state (i.e., preventing the pen tip module from becoming loose), thus improving the writing feel.
[0038] In one implementation, the pen body contains a main support, on which an overload protection section is correspondingly provided. The overload protection section is spaced at a predetermined distance from the pen tip module. Preferably, utilizing the protrusion in the middle of the pen tip module, the front end of the main support is located behind the protrusion in the middle of the pen tip module, with the front end of the main support serving as the overload protection section, and the front end of the main support being spaced at a predetermined distance from the protrusion in the middle of the pen tip module. When the pen tip module is subjected to overpressure, the overload protection section limits the pen tip module, preventing damage to the pressure-sensitive unit.
[0039] In one embodiment, the pressure-sensitive electronic pen also includes a pressure transmitting component, through which the pen tip module transmits writing pressure to the pressure-sensitive unit. The pen body contains a mounting base and a mounting cover. The mounting cover encapsulates the pressure transmitting component, pressure-sensitive unit, and overload spring from front to back within the mounting base. An opening in the mounting cover allows the end of the pen tip module or the pressure transmitting component to pass through, ensuring constant contact between the pen tip module and the pressure transmitting component. The mounting base and mounting cover are detachably connected via a snap-fit structure for easy user assembly, encapsulating the pressure transmitting component, pressure-sensitive unit, and overload spring. The mounting base is also detachably connected to the main support via a snap-fit structure for easy user assembly.
[0040] In one embodiment, the fixed cover is provided with a positioning groove for fixing the contact conductor. The positioning groove limits the contact conductor to prevent it from shifting during writing, thereby causing the contact conductor to disconnect from the contact point.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pressure-sensitive electronic pen based on a pen tip module, comprising a pen body, wherein the pen body contains a pen tip module, a control main board, an overload spring, and a pressure-sensitive unit for detecting the writing pressure of the pen tip module, the pressure-sensitive unit being correspondingly located at the rear end of the pen tip module, characterized in that, The pen tip module is equipped with an adapter board with three contacts. The three contacts are respectively connected to the GND pin and two TX pins of the pen tip module. The pressure-sensitive electronic pen also includes three contact conductors that are electrically connected to the control motherboard. The three contact conductors are respectively connected to the three contacts. An overload spring is located on the rear side of the pressure-sensitive unit and acts on the pressure-sensitive unit.
2. The pressure-sensitive electronic pen based on a pen tip module as described in claim 1, characterized in that, The pen body is equipped with a preload spring, which acts on the pen tip module to apply backward pressure to the pen tip module.
3. The pressure-sensitive electronic pen based on a pen tip module as described in claim 1, characterized in that, The pen body is equipped with a main support, and the main support is equipped with an overload protection part. The overload protection part is spaced at a preset distance from the pen tip module.
4. The pressure-sensitive electronic pen based on a pen tip module as described in claim 3, characterized in that, The pressure-sensitive electronic pen also includes a pressure transmission element, through which the pen tip module transmits writing pressure to the pressure-sensitive unit.
5. The pressure-sensitive electronic pen based on a pen tip module as described in claim 4, characterized in that, The pen body has a fixed base and a fixed cover. The fixed cover encapsulates the pressure transmission component, pressure sensing unit, and overload spring from front to back inside the fixed base.
6. The pressure-sensitive electronic pen based on a pen tip module as described in claim 5, characterized in that, The fixed base and the fixed cover are detachably connected, and the fixed base and the main bracket are detachably connected.
7. The pressure-sensitive electronic pen based on a pen tip module as described in claim 5, characterized in that, The fixed cover is provided with a positioning groove for fixing the contact conductor.
8. The pressure-sensitive electronic pen based on a pen tip module as described in claim 1, characterized in that, The contact conductor is a conductive spring, and the front end of the conductive spring maintains contact with the contact point.
9. The pressure-sensitive electronic pen based on a pen tip module as described in claim 8, characterized in that, The end of the conduction spring is soldered to the control board.
10. The pressure-sensitive electronic pen based on a pen tip module as described in claim 1, characterized in that, The three contacts are arranged in a triangular pattern.