ACTIVE STYLUS

An active stylus includes a tip, a metal pin, a metal shaft, a signal processing module and an elastic ring. A first end of the metal pin is wrapped in the tip. The metal shaft includes an accommodating cavity having an opening. The signal processing module is accommodated in the accommodating cavity. A second end of the metal pin goes through the elastic ring and the opening, and is coupled to the signal processing module. The metal pin is configured to broadcast a touch control signal from the signal processing module with a wireless transmission protocol.

FIELD

The subject matter herein generally relates to an active stylus.

BACKGROUND

The gap between the tip and the shaft of the of the current active stylus does not have dust-proof or impact-proof component. While the active stylus is dropped from a high place and the tip is strongly impacted, by the impact surface, to generate an axial impact force, the axial impact force is harmful to the electronic components in the shaft. Moreover, when a user uses a current active stylus on an electronic device with a touch control panel, the force sensor of the current active stylus is used to generate a sensing signal in response to the pressing applied on the tip.

SUMMARY

The purpose of the present disclosure is to provide an active stylus.

To achieve the above purpose, the current disclosure discloses an active stylus. The active stylus includes a tip, a metal pin, a signal processing module and an elastic ring. The metal pin includes a first end wrapped in the tip shell. The metal shaft includes an accommodating cavity having an opening. The signal processing module is accommodated in the accommodating cavity. The elastic ring is located between the tip and the opening and a second end of the metal pin goes through the elastic ring and the opening, and is coupled to the signal processing module. The metal pin is configured to broadcast a touch control signal from the signal processing module with a wireless transmission protocol.

The current disclosure discloses an active stylus. The active stylus includes a tip, a metal pin and a metal shaft. The metal pin includes a first end wrapped in the tip shell. The metal shaft includes an accommodating cavity having an opening and the accommodating cavity configured to accommodate a pin holder and a sensing module. The pin holder includes a first end formed a holding portion and the holding portion is configured to hold the second end of the metal pin via the opening. The sensing module further includes a metal sheet, a sensor and a micro control unit (MCU).

A second end of the pin holder directly contacts to a first side of the metal sheet and the metal sheet is deformed in response to the axial movement of the pin holder and the metal pin. The sensor is located at a second side of the metal sheet and the sensor is configured to generate a sensing signal in response to sensed deformation of the metal sheet. The first side of the metal sheet is opposed to the second side of the metal sheet.

The micro control unit (MCU) is coupled to the metal sheet by a flexible printed circuit (FPC). The FPC is bonded with the metal sheet by conductive adhesive and the MCU is configured to a control signal in response to the sensing signal. The metal pin is configured to broadcast the touch control signal from the signal processing module with a wireless transmission protocol.

The current disclosure discloses an active stylus. The active stylus includes a tip, a metal pin, a metal shaft and an elastic ring. The metal pin includes a first end wrapped in the tip shell. The metal shaft includes an accommodating cavity having an opening. The accommodating cavity is configured to accommodate a pin holder having a first end formed a holding portion and a sensing module. The elastic ring is located between the tip and the opening. A second end of the metal pin goes through the elastic ring and the opening, and is held by the holding portion;

The sensing module further includes a metal sheet, a sensor and a micro control unit (MCU). A second end of the pin holder directly contacts to a first side of the metal sheet and the metal sheet is deformed in response to the axial movement of the pin holder and the metal pin. The sensor is located at a second side of the metal sheet and the sensor is configured to generate a sensing signal in response to sensed deformation of the metal sheet, wherein the first side of the metal sheet is opposed to the second side of the metal sheet. The MCU is coupled to the metal sheet by a flexible printed circuit (FPC).

The FPC is bonded with the metal sheet by conductive adhesive and the MCU is configured to generate a touch control signal in response to the sensing signal. The metal pin is configured to broadcast the touch control signal from the signal processing module with a wireless transmission protocol.

It should be understood that the description in the section is not intended to identify key or important features of embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will be readily understood from the following specification.

DETAILED DESCRIPTION

The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasable connected.

FIG.1is a schematic view of an active stylus1of one embodiment of the present disclosure.FIG.2is a schematic explosion view of the active stylus1ofFIG.1.FIG.3Ais a cross-sectional view alone an AA′ line of the active stylus1ofFIG.1. As shown inFIGS.1to3A, the active stylus1includes a tip11, a metal pin21, a metal shaft13and an elastic ring15. In this embodiment, a first end211of the metal pin21is wrapped in the tip11. The metal shaft13includes an accommodation cavity. The accommodation cavity has an opening23. In one embodiment, the elastic ring15includes a rubber elastic ring. In one embodiment, the elastic ring15includes a silicon elastic ring. In one embodiment, the tip11includes a silicon tip. As shown inFIG.1, in this embodiment, a charging port12is configured to allow an external power source to charge the battery of the active stylus1. In one embodiment, the charging port12includes a USB Type-C charging port.

As shown inFIG.2, a second end213of the metal pin21goes through the elastic ring15and the opening23, and is coupled to the signal processing module. In this embodiment, the metal pin21is configured to broadcast a touch control signal from the signal processing module with a wireless transmission protocol. The elastic ring15is configured to cover a gap between the tip11and the metal shaft13to be as a dust-proof component. The failure possibilities of the active stylus11, caused by dust, are then substantially reduced. Moreover, while the active stylus1is dropped from a high place and the tip11is strongly impacted, by the impact surface, to generate an axial impact force, the elastic ring15provides impact-proof to prevent the impact force from damaging the internal electronic components of the active stylus1.

As shown inFIGS.3A and3B, the signal processing module includes a pin holder33and a sensing module35. In this embodiment, a first end of the pin holder33is formed a holding portion331. The holding portion331is configured to hold a second end213of the metal pin21. In this embodiment, the sensing module35further includes a metal sheet351, a sensor353and a micro control unit (MCU)31. A second end333of the pin holder33is directly contacted to a first side of metal sheet351. The sensor353is located on a second side of the metal sheet351. The first side of the metal351is opposite to the second side of the metal sheet351. In this embodiment, as shown inFIG.3A, since the second end333of the pin holder33is directly contact to the first side of the metal sheet, the active stylus1only requires a preloaded spring38located between a snap ring34and clamp blocks36. Therefore, the preloaded stroke of the active stylus1is then reduced.

In this embodiment, the second end333of the pin holder33presses, in response to the axial movement of the metal pin21, the first side of the metal sheet351and the metal sheet351is then deformed. A sensing signal is generated, in response to the sensed deformation of the metal sheet351, by the sensor353. In this embodiment, the sensor353includes integrated circuits. The metal sheet351is coupled to the MCU31by a flexible printed circuit (FPC)37. Moreover, the FPC37is bonded with the metal sheet351with conductive adhesive. A touch control signal is generated, in response to the sensing signal, by the MCU31. The touch control signal is transmitted to the metal pin21via the FPC37, the conductive adhesive, the metal sheet351and the pin holder33. The touch control signal is then broadcasted, with a wireless transmission protocol, by the metal pin21. In this embodiment, the wireless transmission protocol includes Bluetooth.

For example, when a user uses the active stylus1to perform touch control actions on a touch control panel of an electronic device, the tip11is pressed and the second end of the pin holder33then press the metal sheet351. The metal sheet351is deformed in response to the pressing performed by the second end of the pin holder33. A sensing signal is generated, in response to sensed deformation of the metal sheet351, by the sensor353and transmitted to the MCU31via the FPC37. A touch control signal is generated, in response to the sensing signal, by the MCU31and the touch control signal is transmitted, via the FPC37, the conduct adhesive, the metal sheet351and the pin holder33, to the metal pin21. The touch control signal is then broadcasted via the metal pin21with a wireless transmission protocol. When the touch control signal is received by the electronic device, the information relevant to the received touch control signal is presented on the touch panel.

FIG.4Ais a schematic view of an active stylus1′ of one embodiment of the present disclosure.FIG.4Bis a cross-sectional view alone an BB′ line of the active stylus1′ ofFIG.4A. As shown inFIGS.4A to4B, the active stylus1′ includes the tip11, the metal pin21and the metal shaft13. In this embodiment, the first end211of the metal pin21is wrapped in the tip11. In one embodiment, the tip11includes a silicon tip. The metal shaft13includes an accommodation cavity. The accommodation cavity has the opening23. The second end213of the metal pin21is coupled to the signal processing module via the opening23. In this embodiment, the metal pin is configured to broadcast a touch control signal from the signal processing module with a wireless transmission protocol. As shown inFIG.4B, a charging port12is configured to allow an external power source to charge the battery of the active stylus1. In one embodiment, the charging port12includes a USB Type-C charging port.

As shown inFIG.4B, the signal processing module includes the pin holder33and the sensing module35. In this embodiment, the first end of the pin holder33is formed the holding portion331. The holding portion331is configured to hold the second end213of the metal pin21. In this embodiment, the sensing module35further includes the metal sheet351, the sensor353and the micro control unit (MCU)31. The second end333of the pin holder33is directly contacted to the first side of metal sheet351. The sensor353is located on the second side of the metal sheet351. The first side of the metal351is opposite to the second side of the metal sheet351. In this embodiment, as shown inFIG.4B, since the second end333of the pin holder33is directly contact to the first side of the metal sheet, the active stylus1only requires a preloaded spring38located between a snap ring34and clamp blocks36. Therefore, the preloaded stroke of the active stylus1is then reduced.

In this embodiment, the second end333of the pin holder33presses, in response to the axial movement of the metal pin21, the first side of the metal sheet351and the metal sheet351is then deformed. A sensing signal is generated, in response to the sensed deformation of the metal sheet351, by the sensor353. In this embodiment, the sensor353includes integrated circuits. The metal sheet351is coupled to the MCU31by a flexible printed circuit (FPC)37. Moreover, the FPC37is bonded with the metal sheet351with conductive adhesive. A touch control signal is generated, in response to the sensing signal, by the MCU31. The touch control signal is transmitted to the metal pin21via the FPC37, the conductive adhesive, the metal sheet351and the pin holder33. The touch control signal is then broadcasted, with a wireless transmission protocol, by the metal pin21. In this embodiment, the wireless transmission protocol includes Bluetooth.