A crown magnetic coding system

Abstract

This utility model relates to a watch crown magnetic coding system, including a magnet disposed inside the crown knob. The magnet is connected to a spring contact via a rotating shaft, and the spring contact is connected to a PCB board equipped with a micro-sensor. When the crown knob rotates, the micro-sensor detects the rotation angle by sensing the change in the magnetic field generated by the rotating magnet. An external microcontroller unit executes corresponding user operations based on the change in the rotation angle. When the crown knob is pressed, the magnet approaches the micro-sensor, causing the micro-sensor to generate a voltage level change. The external microcontroller unit executes corresponding user operations based on the voltage level change. This utility model significantly reduces the overall size, effectively improving the size design of the watch battery, and is highly adaptable to the environment, not easily affected by dust, oil, etc. Simultaneously, this utility model significantly reduces power consumption.

Description

Technical Field

[0001] This utility model relates to the field of smartwatch technology, and more specifically to a crown magnetic coding system. Background Technology

[0002] In practical applications of smartwatches, traditional crown designs typically employ either mechanical or optical encoders. Mechanical crowns, embedded within the watch case, are bulky, limiting battery size and causing battery anxiety. Optical encoders, on the other hand, are more sensitive to environmental conditions, easily blocked by dust and oil, affecting their operation, and also consume more power. Utility Model Content

[0003] To address the problems in the prior art, this invention provides a crown magnetic coding system that can reduce the size of the watch battery while enhancing environmental adaptability and reducing power consumption.

[0004] This utility model provides a watch crown magnetic coding system, including a magnet disposed inside the crown knob. The magnet is connected to a spring contact via a rotating shaft, and the spring contact is connected to a PCB board equipped with a micro sensor. When the crown knob is rotated, the micro sensor detects the rotation angle by sensing the change in the magnetic field generated by the rotation of the magnet. An external microcontroller unit executes corresponding user operations based on the change in the rotation angle. When the crown knob is pressed, the magnet approaches the micro sensor, the micro sensor generates a voltage level change, and the external microcontroller unit executes corresponding user operations based on the voltage level change.

[0005] Furthermore, the spring sheet has a first surface and a second surface. The first surface is in close contact with the end of the rotating shaft, and the second surface abuts against the PCB board and covers the area where the micro sensor is located.

[0006] Furthermore, the micro-sensor employs a 3D linear Hall effect sensor.

[0007] Furthermore, the micro-sensor is soldered onto the PCB board.

[0008] Furthermore, the spring, the PCB board, and the micro sensor are all placed inside the shielding cover.

[0009] Furthermore, the magnet is radially magnetized.

[0010] Furthermore, the magnet is an N52 magnet or an N35 magnet.

[0011] This invention embeds the PCB circuit board, micro-sensor, and spring clip inside the crown, significantly reducing the overall size and effectively improving the design of the watch battery. It also exhibits strong environmental adaptability, being less susceptible to dust, oil, and other contaminants. Furthermore, the shutdown current and current in each mode are all in the microamplitude range, a significant reduction in power consumption compared to the milliamp-level power consumption of existing optical encoder solutions. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the crown magnetic stencil system according to this utility model.

[0013] Figure 2 This is a pin diagram of a 3D linear Hall effect sensor. Detailed Implementation

[0014] To make the objectives, solutions, and advantages of this utility model clearer, the specific structure and working principle of this utility model will be described in more detail below with reference to the accompanying drawings. The embodiments described are only for explaining this utility model and are not limited to these embodiments, nor are they intended to limit the scope of application of this utility model.

[0015] The purpose of the following content is to provide the public with a clearer understanding of this utility model. However, those skilled in the art can clearly understand this utility model even without the following detailed description.

[0016] like Figure 1 As shown, the present invention provides a crown magnetic coding system, including a magnet 1 disposed inside the crown knob. The magnet 1 is connected to a spring 3 via a rotating shaft 2. The spring 3 is connected to a PCB board 4 on which a miniature sensor 5 is disposed. The spring 3, the PCB board 4 and the miniature sensor 5 are all placed inside a shielding cover 6 to effectively prevent interference from external magnetic fields.

[0017] In this embodiment, magnet 1 is radially magnetized and connected to rotating shaft 2 for pressing spring 3. In this embodiment, magnet 1 can be an N52 magnet or an N35 magnet.

[0018] The spring 3 is used for tactile feedback of the watch button function. It has a first surface and a second surface. The first surface is in close contact with the end of the rotating shaft 2, and the second surface abuts against the PCB board 4 and covers the area where the micro sensor 5 is located.

[0019] A miniature sensor 5 is mounted on PCB board 4 for electrical connection and signal transmission. In this embodiment, the miniature sensor 5 is a 16-bit high-precision 3D linear Hall effect sensor, soldered onto PCB board 4, used for detecting the rotation angle of the crown knob and button presses. Figure 2As shown, the 3D linear Hall effect sensor has six ports: clock SCL, power VDD, button output BUTT_OUT, enable ODINT, ground GND, and data SDA.

[0020] When the crown knob is rotated, the 3D linear Hall effect sensor detects the rotation angle by sensing the change in the magnetic field generated by the rotating magnet 1. The external microcontroller unit executes the corresponding user operation based on the change in the rotation angle value. When the crown knob is pressed, the magnet 1 approaches the 3D linear Hall effect sensor, and the button output terminal BUTT_OUT of the 3D linear Hall effect sensor generates a level change. The external microcontroller unit executes the corresponding user operation based on the level change.

[0021] More specifically, when the crown knob is rotated, the rotation of the crown knob causes magnet 1 to rotate. The 3D linear Hall effect sensor detects the rotation angle of the crown by sensing the change in the magnetic field generated when magnet 1 rotates. The external microcontroller unit detects this rotation angle via I / O. 2 The C-communication module reads the angle value of the 3D linear Hall effect sensor and determines the change in angle value before and after, executing corresponding operations such as page turning, zooming in and out, adjusting volume, backlight, and camera focus. When the crown knob is pressed, magnet 1 approaches the 3D linear Hall effect sensor, increasing the planar magnetic field magnitude to the BOP threshold set by the 3D linear Hall effect sensor. The lower transistor of the button output terminal BUTT_OUT is turned on, and the button output terminal BUTT_OUT changes from high level to low level. When the crown knob is released, the planar magnetic field magnitude decreases to the BRP threshold set by the 3D linear Hall effect sensor, turning off the lower transistor of the button output terminal BUTT_OUT. The button output terminal BUTT_OUT changes from low level to high level. The microcontroller unit determines that this is a button press action and executes operations such as waking up the screen or confirming the menu.

[0022] The following table compares the magnetic encoder solution of this invention with the optical encoder solution in the prior art:

[0023] cost Low high accuracy High high Overall crown dimensions Small big Power consumption uA level mA level Structural design On axis / off axis On the axis

[0024] This invention employs a 16-bit high-precision absolute angle output 3D linear Hall effect chip, which can detect the crown's rotation angle by sensing changes in the magnetic field. During button operation, it triggers a planar magnetic field threshold to achieve button function. It can also achieve a three-axis switch function by setting a three-axis switch threshold, all without direct contact, reducing the risk of wear and damage. Furthermore, the shutdown current and current in each mode of this invention are in the microamplitude range, significantly reducing power consumption compared to the milliamp-level power consumption of existing optical encoding solutions.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. That is, all simple and equivalent changes and modifications made based on the claims and description of this utility model application fall within the protection scope of the claims of this utility model patent. Any aspects of this utility model not described in detail are conventional technical content.

Claims

1. A crown magnetic coding system, characterized in that, It includes a magnet located inside the crown knob, the magnet being connected to a spring via a rotating shaft, and the spring being connected to a PCB board equipped with a micro-sensor; When the crown knob is rotated, the micro sensor detects the rotation angle by sensing the change in the magnetic field generated when the magnet rotates, and the external microcontroller performs corresponding user operations based on the change in the rotation angle. When the crown knob is pressed, the magnet approaches the micro-sensor, which generates a voltage level change. The external microcontroller unit then executes the corresponding user operation based on the voltage level change.

2. The crown magnetic stencil system according to claim 1, characterized in that, The spring has a first surface and a second surface. The first surface is in close contact with the end of the rotating shaft, and the second surface abuts against the PCB board and covers the area where the micro sensor is located.

3. The crown magnetic sizing system according to claim 1, characterized in that, The microsensor employs a 3D linear Hall effect sensor.

4. The crown magnetic stencil system according to claim 1, characterized in that, The miniature sensor is soldered onto the PCB board.

5. The crown magnetic stencil system according to claim 1, characterized in that, The spring, the PCB board, and the micro sensor are all placed inside the shielding cover.

6. The crown magnetic stencil system according to claim 1, characterized in that, The magnet is radially magnetized.

7. The crown magnetic stencil system according to claim 1, characterized in that, The magnet is an N52 magnet or an N35 magnet.

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