Power supply devices for wearable devices and portable devices

Abstract

The present invention belongs to the field of antenna technology, and provides an external power supply device and a portable device applied to a wearable device, wherein the external power supply device comprises a housing, a battery arranged in the housing, and a charging and discharging interface electrically connected to the battery, and the external power supply device further comprises a grounding metal plate arranged in the housing, and an antenna interface electrically connected to the grounding metal plate and used to communicate with the wearable device. When the wearable device is docked with the external power supply device for charging, an external grounding metal plate can be provided to constitute a coupling branch of the wearable device's own antenna, increase the antenna reference ground, improve the antenna performance, and greatly improve the antenna radiation efficiency of the wearable device.

Description

Technical Field

[0001] The present invention belongs to the field of antenna technology, and in particular relates to a power supply device and a portable device applied to a wearable device. Background Art

[0002] Smart wearable devices have the advantages of being easy to carry, being able to quickly sense needs and timely monitor human health, such as smart watches and smart bracelets. Market demand is increasing day by day, but the functions of smart wearable devices are constantly increasing, which makes power consumption faster, and the battery life issue needs to be paid special attention. At present, in order to solve the battery life issue, an external battery charging device is added to charge the watch. However, the introduction of an external battery has a huge impact on the performance of the antenna, greatly weakening the signal transmission and reception capabilities, resulting in the inability to answer calls normally due to poor signals when the watch is in the external battery state, affecting the user experience. Summary of the invention

[0003] The purpose of the present invention is to provide a power supply device and a portable device applied to a wearable device, aiming to solve the problem that an external battery affects the antenna performance of the wearable device itself.

[0004] A first aspect of the present invention provides an external power supply device for a wearable device, comprising a housing, a battery disposed in the housing, and a charging and discharging interface electrically connected to the battery. The external power supply device also includes a grounded metal plate disposed in the housing, and an antenna interface electrically connected to the grounded metal plate and used to communicate with the wearable device.

[0005] In one of the embodiments, the charging and discharging interface includes a positive terminal and a negative terminal provided on the housing, the antenna interface is the negative terminal, and the grounding panel is electrically connected to the negative terminal of the battery.

[0006] In one of the embodiments, the antenna interface includes a feeding terminal disposed on the housing.

[0007] In one embodiment, the grounded metal plate is coupled to a housing of the battery.

[0008] A second aspect of the present invention provides a portable device, comprising the above-mentioned external power supply device and a wearable device matched with the external power supply device, wherein the antenna interface of the external power supply device is connected to the external antenna interface of the wearable device.

[0009] In one of the embodiments, the wearable device is provided with an external antenna interface as its negative charging terminal.

[0010] In one of the embodiments, the external antenna interface of the wearable device includes a feeding terminal arranged on its housing.

[0011] The above-mentioned external power supply device applied to the wearable device can provide an external grounded metal plate when the wearable device is docked with the external power supply device for charging, thereby constituting a coupling branch of the wearable device's own antenna, increasing the antenna reference ground, improving the antenna performance, and greatly improving the antenna radiation efficiency of the wearable device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of an external power supply device applied to a wearable device provided by an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of the structure of an external power supply device applied to a wearable device provided by an embodiment of the present invention;

[0014] Figure 3 A return loss S11 curve diagram of an antenna of a portable device provided in an embodiment of the present invention;

[0015] Figure 4 This is an efficiency curve diagram of the antenna of the portable device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] See also Figure 1 and Figure 2 The external power supply device 10 applied to the wearable device 20 in the embodiment of the present application includes a shell 11, a battery 12 arranged in the shell 11, a charging and discharging interface 13 electrically connected to the battery 12, a grounding metal plate 14 arranged in the shell 11, and an antenna interface 15 coupled to the grounding metal plate 14 and used for communicating with the wearable device 20.

[0018] The grounded metal plate 14 serves as an antenna reference ground added to the wearable device 20 and can be disposed on the inner side or the outer side of the housing 11 of the external power supply device 10. The housing 11 is generally made of insulating material to avoid affecting the antenna performance.

[0019] The charging and discharging interface 13 can be a Micro USB interface, a Type-C USB interface, or a Pogo pin, etc., which is matched according to the charging interface of the wearable device 20. In one embodiment, the charging and discharging interface 13 is a Pogo pin, which includes a positive terminal 131 and a negative terminal 132 provided on the housing 11.

[0020] See also Figure 1In one embodiment, the negative terminal 132 of the charge and discharge interface 13 of the external power supply device 10 is reused as the antenna interface 15. The charge and discharge interface 13 is grounded to connect the mainboard of the wearable device 20 to the grounded metal plate 14 without introducing an additional connection method, thereby reducing the structural complexity and circuit complexity and saving costs. In another embodiment, the antenna interface 15 of the external power supply device 10 is independently provided, including a feeding terminal (not shown) provided on the housing 11, and the feeding terminal is a Pogo pin, or any form of conductive member such as a contact spring, a snap-on structure, etc. Generally, the charge and discharge interface 13 and the antenna interface 15 of the external power supply device 10 are provided at the bottom of the housing 11.

[0021] By introducing a grounded metal plate 14 in the external power supply device 10 as an external reference ground for the wearable device 20's own antenna, when the external power supply device 10 is installed on the wearable device 20, when the wearable device 20's own antenna is affected by the external power supply device 10 and has difficulty receiving signals, the external reference ground constitutes a coupling branch of the antenna, which significantly improves the performance of the antenna and can provide the wearable device 20 with excellent signal reception capabilities to meet the user's communication and positioning needs.

[0022] Furthermore, the grounded metal plate 14 is coupled to the outer shell of the battery 12. The outer shell of the battery 12 is generally made of metal, so that the outer shell of the battery 12 serves as an antenna branch of the wearable device 20, participates in radiation, and enhances the signal receiving capability, rather than hindering the radiation of the signal. The idea proposed in this solution cleverly combines the increase in the reference ground area and the ground-coupled antenna branch technology to solve the antenna problem caused by the external charging device. The connection method between the grounded metal plate 14 and the battery 12 is not limited to Figure 1 , 2 The circular conductor 141 can be a conductor of any shape and material.

[0023] A second aspect of the present invention provides a portable device, comprising the external power supply device 10 and a wearable device 20 , wherein the antenna interface 15 of the external power supply device 10 is connected to the external antenna interface of the wearable device 20 .

[0024] In one embodiment, when the negative terminal 132 of the charging and discharging interface 13 of the external power supply device 10 is reused as the antenna interface 15, the external antenna interface of the wearable device 20 is correspondingly provided as its charging negative terminal 24.

[0025] In another embodiment, when the antenna interface 15 of the external power supply device 10 is an independently arranged feeding terminal, correspondingly, the external antenna interface of the wearable device 20 includes a feeding terminal arranged on its housing 22 .

[0026] Figure 3 , Figure 4 The antenna return loss S11 and efficiency curves are given respectively, where Figure 3 The curves L11, L12, and L13 in the figure respectively represent the waveforms of antenna return loss S11 when the antenna works at low, medium, and high frequencies; Figure 4 The curves L21, L22, and L23 in the figure represent the antenna radiation efficiency curves when the antenna works in low, medium, and high frequency states respectively. From the efficiency curves, it can be seen that the antenna low-frequency peak efficiency is about -9dB, the medium-frequency peak efficiency is about -7dB, and the high-frequency peak efficiency is -8dB. The antenna performance is good.

[0027] The essential reason for the poor performance of the wearable device 20's own antenna when it is connected to the external power supply device 10 is that the external power supply device 10 changes the working environment of the antenna, the resonant frequency of the own antenna changes, and the external power supply device 10 hinders the transmission and reception of signals by the own antenna. The solution of the present application increases the reference ground area by adding a suspended large-area grounded metal plate 14 that is connected to the mainboard 25. In addition, the external battery 12 also acts as an antenna coupling branch. As a part of the antenna, it helps the radiation of the antenna instead of hindering the radiation of the signal.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external power supply device for a wearable device, comprising a housing, a battery disposed in the housing, and a charge and discharge interface electrically connected to the battery, characterized in that: The external power supply device also includes a grounding metal plate arranged in the shell, and an antenna interface electrically connected to the grounding metal plate and used to communicate with the wearable device. The grounding metal plate is coupled to the metal shell of the battery.

2. The external power supply device according to claim 1, characterized in that: The charging and discharging interface includes a positive terminal and a negative terminal arranged on the shell, the antenna interface is the negative terminal, and the grounding metal plate is electrically connected to the negative terminal of the battery.

3. The external power supply device according to claim 1, characterized in that: The antenna interface includes a feeding terminal disposed on the housing.

4. A portable device, characterized in that: It comprises the external power supply device according to any one of claims 1 to 3 and a wearable device matched with the external power supply device, wherein the antenna interface of the external power supply device is connected to the external antenna interface of the wearable device.

5. The portable device according to claim 4, characterized in that: The wearable device is provided with an external antenna interface as its negative charging terminal.

6. The portable device according to claim 4, characterized in that: The external antenna interface of the wearable device includes a feeding terminal arranged on its shell.

Images