Smart glasses with wearing detection function

Abstract

This invention relates to the field of smart wearable products and provides a smart pair of glasses with a wear detection function. The glasses include a frame, two temples, and at least one temple housing a circuit board. The circuit board contains at least one processor and at least one sensor connected to the processor. A metal pin is fixedly connected to the end of each temple, and the metal pin is electrically connected to the sensor via an FPC. The sensor is used to collect capacitance parameters of the equivalent capacitance formed between the metal pin and the user's skin. The processor is used to determine whether the smart glasses are being worn based on the capacitance parameters. The entire detection process requires no user intervention; the automatic judgment is achieved through changes in the electrical signal generated by the physical contact between the metal pin and the user's skin, and the working state of the smart glasses is automatically controlled based on the judgment result.

Description

Technical Field

[0001] This utility model belongs to the field of smart wearable products, and in particular relates to a smart glasses with wear detection function. Background Technology

[0002] Smart wearable devices are a general term for wearable devices that are designed and developed with intelligent features for everyday wearable items, such as watches, bracelets, glasses, and clothing. Among them, smart glasses can be considered a representative type of smart wearable device, which is being applied to all aspects of people's lives, work, and entertainment.

[0003] As smart glasses become increasingly feature-rich, their power consumption issues are becoming more prominent. How to effectively save power consumption to improve battery life has become a key problem that urgently needs to be solved.

[0004] Currently, a common energy-saving solution is to control the working mode of smart glasses based on the wearing status. When wearing the glasses, the user manually turns them on; when not wearing them, the user manually controls them to enter a low-power mode or turn them off. However, in actual use, users often fail to control the glasses to enter low-power mode or turn them off in time when not wearing them, significantly reducing battery life. Furthermore, manual operation is cumbersome and degrades the user experience. Utility Model Content

[0005] The technical problem to be solved by this invention is how smart glasses can automatically identify whether they are being worn, thereby reducing the user's workload.

[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows: a smart glasses with wear detection function includes a frame, two temples, and a circuit board disposed in at least one temple. At least one processor and at least one sensor connected to the processor are mounted on the circuit board. A metal pin is fixedly connected to the end of the at least one temple, and the metal pin is electrically connected to the sensor via an FPC. The sensor is used to collect capacitance parameters of the equivalent capacitance formed between the metal pin and the user's skin. The processor is used to determine whether the smart glasses are being worn based on the capacitance parameters.

[0007] Compared with existing technologies, the advantages of this invention are as follows: When a user wears the smart glasses, the metal pin at the end of the temple contacts the skin around the ear, forming an equivalent capacitance structure. A sensor continuously collects the capacitance parameters of this equivalent capacitance via an FPC and transmits the data to a processor. The processor monitors the capacitance value in real time, and when the detected capacitance change exceeds a preset threshold, it determines that the smart glasses are being worn. This determination triggers the smart glasses to power on or exit low-power mode; conversely, it controls the smart glasses to power off or enter low-power mode. The entire detection process requires no user intervention; it automatically determines the glasses based on the electrical signal changes generated by the physical contact between the metal pin and the skin, and then automatically controls the working state of the smart glasses according to the determination result. Attached Figure Description

[0008] Figure 1 This is a structural diagram of the smart glasses provided in an embodiment of the present utility model;

[0009] Figure 2 This is a structural diagram of the temple of the smart glasses provided in an embodiment of this utility model;

[0010] Figure 3 yes Figure 2 The cross-sectional view of the temple shown;

[0011] Figure 4 yes Figure 3 The top view of the temple after sectional view shown;

[0012] Figure 5 This is a structural diagram of the metal tail pin of the smart glasses provided in this embodiment of the utility model;

[0013] Figure 6 This is a module structure diagram of the smart glasses provided in this embodiment of the utility model;

[0014] Figure 7 This is a module structure diagram of the smart glasses with a speaker provided in this embodiment of the utility model;

[0015] Figure 8 This is a structural diagram of the loudspeaker provided in an embodiment of the present invention;

[0016] Figure 9 This is a design structure diagram of the temple and FPC provided in an embodiment of this utility model;

[0017] Figure 10A and Figure 10B These are comparison diagrams of electromagnetic interference signals before and after the isolation electrode area is set at the sound outlet of the speaker, according to the embodiments of this utility model.

[0018] Figure 11This is a schematic diagram of the bent isolation electrode region in the FPC provided in this embodiment of the utility model;

[0019] Figure 12 This is a schematic diagram of the input / output port connection of the sensor provided in this embodiment of the utility model;

[0020] Figure 13 This is a schematic diagram showing the connection between the metal tail pin and the FPC via a conductor probe according to an embodiment of this utility model;

[0021] Figure 14 This is a structural diagram of the conductor probe provided in an embodiment of the present invention;

[0022] Figure 15 This is a schematic diagram of an embodiment of the present invention showing an FPC bent and assembled with a speaker;

[0023] Figure 16 Is Figure 15 This is a schematic diagram showing how to bond an FPC to a circuit board.

[0024] Figure 17 yes Figure 16 Side view. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Research has revealed that when human skin comes into contact with or is close to a metallic material, or when human skin comes into contact with or is close to an insulating surface covered with a metallic material, an equivalent capacitance is formed between the skin and the metallic material. The capacitance parameter of this equivalent capacitance changes with the distance between the two. Based on this physical characteristic, this application uses the metallic material in smart glasses that can contact human skin as a detection electrode. When a user wears the smart glasses, this metallic material forms an equivalent capacitance with the skin, and the wearing status can be confirmed by detecting this capacitance parameter. This approach overcomes the limitations of traditional manual operation, converting physical contact into a quantifiable electrical signal.

[0027] Furthermore, to simplify circuit design and save costs, this application eliminates the need for a separate detection electrode to form the aforementioned equivalent capacitance. Instead, it directly reuses the "metal tail pin" inside the temple as the detection electrode. Since the metal tail pin is connected to the end of the temple, it will inevitably come into contact with the skin around the user's ear during wear, thus forming an equivalent capacitance. Alternatively, if a separate detection electrode were designed on the front half of the temple instead of using the metal tail pin, it would not only increase costs but also prevent the front half of the temple from contacting the skin for people with narrow faces, making it impossible to accurately detect the capacitance parameters of the formed equivalent capacitance. Therefore, this application's direct reuse of the metal tail pin, which is guaranteed to make direct contact with the skin around the ear, to form the equivalent capacitance offers advantages such as simple circuit structure, accurate detection, and lower cost.

[0028] Therefore, based on the above premises, the first embodiment of this application provides a smart glasses with a wear detection function, which can automatically detect whether the smart glasses are in a wearing state or a non-wearing state, and thereby automatically control the working state of the smart glasses.

[0029] See Figures 1 to 5 The smart glasses include a frame 11 and two temples 12. At least one temple 12 has a circuit board 121 inside. At least one processor 122 and at least one sensor 123 connected to the processor 122 are mounted on the circuit board 121. A metal pin 130 is fixedly connected to the end of at least one temple 12.

[0030] In addition, to protect the metal tail needle 130, a tail needle sleeve 13 can be fitted onto the metal tail needle 130. Therefore, the so-called contact between the metal tail needle 130 and the user's skin in this application includes both the application scenario where the metal tail needle 130 directly contacts the user's skin and the application scenario where the metal tail needle 130 is fitted with a tail needle sleeve 13 and then contacts the user's skin through the tail needle sleeve 13. In both cases, the metal tail needle 130 and the user's skin can form an equivalent capacitance.

[0031] The metal tail pin 130 and the tail end of the leg 12 can be fixedly connected by injection molding, such as... Figure 5 As shown, the metal tail pin 130 has a through hole 1301 at one end connected to the temple 12 for injection molding.

[0032] Injection-molded fixed connection refers to placing the metal tail pin 130 into a mold and injecting molten plastic to form an integrated fixed structure with the tail end of the temple 12. Specifically, this can be achieved by wrapping a predetermined area of ​​the metal tail pin 130 with thermoplastic material inside the mold. This process utilizes the shrinkage force generated by the cooling and solidification of the plastic to form a mechanical interlock with the surface of the metal tail pin 130, thereby eliminating connection gaps. After the plastic cools and solidifies, it forms a shell at the tail end of the temple 12 that encloses the metal tail pin 130, with no gaps between the metal tail pin 130 and the plastic shell. Since the metal tail pin 130 is completely covered and has no external fasteners, there is no relative displacement between it and the temple 12, thus maintaining the geometric stability of the equivalent capacitance detection unit. The through hole 1301 is a circular or irregularly shaped hole machined on the surface of the metal tail pin 130, allowing molten plastic to flow into the through hole during injection molding to form an undercut structure, thereby enhancing the anchoring force. In some specific embodiments, the surface of the metal tail pin 130 may be provided with multiple through holes 1301, which are spaced apart along the axial direction. After the injection molding material enters each through hole, it forms a lateral limiting structure. The contact end of the metal tail pin 130 may retain an exposed area for establishing an electrical connection with the sensor 123.

[0033] Figure 6 The electrical connection structure between the modules of the above-mentioned devices is shown. The metal tail pin 130 is electrically connected to the sensor 123 through the FPC (Flexible Printed Circuit) 14. The electrical connection here can be that the FPC 14 is directly connected to the sensor 123, or the FPC 14 is indirectly connected to the sensor 123. For example, the FPC 14 is electrically connected to the sensor 123 through an adapter.

[0034] The metal tail pin 130 can be made of conductive materials such as stainless steel or titanium alloy, and its surface can be treated with anti-oxidation to maintain conductivity stability.

[0035] FPC 14 is a flexible conductive line connecting the metal tail pin 130 and the sensor 123. It can be made of polyimide substrate, and its bending characteristics can adapt to the assembly space inside the temple 12.

[0036] Sensor 123 is equivalent to a capacitance detection module, which can be implemented using a digital capacitance conversion chip. It is used to convert the collected analog capacitance signal into a digital signal. Sensor 123 continuously collects the capacitance parameter of the equivalent capacitance formed by the metal tail needle 130 in contact with the skin, and converts the capacitance parameter into a digital signal and sends it to processor 122. As mentioned above, the capacitance parameter can change with the distance between the metal tail needle 130 and the user's skin.

[0037] The processor 122 can be an embedded controller, such as a low-power microcontroller unit or a Bluetooth processing chip, with a built-in comparison algorithm for analyzing capacitance parameters or changes in capacitance parameters, or it can be implemented using a comparator. The processor 122 is used to determine whether the smart glasses are being worn based on the capacitance parameters, and controls the working state of the smart glasses according to the determination result. Specifically, if the determination result is that the smart glasses are being worn, the processor 122 controls the smart glasses to power on; if the determination result is that the smart glasses are not being worn, the processor 122 controls the smart glasses to power off or enter a low-power mode. It should be noted that in this application, the power-off mode and low-power mode of the smart glasses are actually standby states. In this state, only necessary electronic components remain operational, such as maintaining the monitoring of touch operation signals or the monitoring of wear detection signals, while other high-power-consuming devices do not operate.

[0038] During the judgment, the processor 122 can directly use the received capacitance parameter to make the judgment. For example, if the currently received capacitance parameter is C1, C1 is compared with the pre-stored capacitance parameter threshold. If C1 is greater than the capacitance parameter threshold, the smart glasses are considered to be in the wearing state; otherwise, they are in the unwearing state.

[0039] The processor 122 can also use the difference method to determine the value. For example, if the capacitance parameter received by the processor 122 when the smart glasses are not worn is C0, and the capacitance parameter received by the processor 122 at present is C1, then C1 minus C0 is taken as the change in capacitance parameter. The change is compared with the pre-stored difference threshold. If the change is greater than the difference threshold, the smart glasses are considered to be in the wearing state; otherwise, they are in the unwearing state.

[0040] Please continue reading. Figure 9 The FPC 14 may further include a touch detection electrode area 144, where the detection electrodes of the touch detection electrode area 144, the detection electrodes of the wear detection electrode area 141, and the ground wire of the isolation electrode area 142 are all electrically connected to the circuit board 121 via gold fingers 140. By routing the touch detection and wear detection lines on the same FPC 14, the assembly process can be simplified.

[0041] The touch detection electrode area 144 is used to sense the user's touch operation. Figure 9 The power on / off touch area B and the sliding touch area C are shown as examples. In implementation, the corresponding touch functions can be added or removed according to the specific functional design.

[0042] Sensor 123 is also used to convert the user's operation on the touch detection electrode area 144 into a digital electrical signal; processor 122 is used to control the smart glasses accordingly based on the electrical signal, such as turning on, turning off, and turning the speaker volume up or down. Figure 12 The interface design of the input and output terminals of sensor 123 is shown. Input port ch1 is used to acquire the power-on / off signal of the power-on / off touch area B. Input ports ch2 and ch3 are used to acquire the touch operation signals at both ends of the sliding touch area C. Input port ch4 is used to acquire the wear detection signal of area A1 in the wear detection electrode area 141. Input port ch5 is used to acquire the wear detection signal of area A2 in the wear detection electrode area 141. Input ports ref1 and ref2 are used to input reference signals for the processor to perform calculations.

[0043] It should be noted that, for ease of drawing, the wear detection and touch detection in this application share the sensor 123 and the processor 122. In specific implementation, the sharing can be determined according to the performance of the selected sensor and processor. That is, wear detection and touch detection can also use independent sensors and processors respectively.

[0044] In summary, in the first embodiment of this application, when a user wears the smart glasses, the metal pin 130 at the end of the temple 12 contacts the skin around the ear, forming an equivalent capacitance structure. The sensor 123 continuously collects this capacitance parameter via the FPC 14 and transmits the data to the processor 122. The processor 122 monitors the capacitance value in real time, and when the detected capacitance change exceeds a preset threshold, it determines that the smart glasses are being worn. This determination result is used to trigger the smart glasses to power on or exit low-power mode; conversely, it controls the smart glasses to power off or enter low-power mode. The entire detection process requires no user intervention; automatic judgment is achieved through changes in electrical signals generated by physical contact.

[0045] Compared to existing technologies, traditional solutions rely on physical buttons or gravity sensors to determine the status of smart glasses, which are prone to misjudgment due to accidental touches or movement when not wearing them. The first embodiment of this application establishes a more accurate wearing status determination mechanism by directly detecting capacitance changes caused by contact with the human body. The combined design of the metal tail pin 130 and FPC 14 ensures accurate wearing detection while avoiding the introduction of additional detection electrode structures, thus maintaining the lightweight characteristics of the smart glasses.

[0046] Furthermore, in the first embodiment of this application, as Figure 7As shown, the smart glasses also include a speaker 15 connected to the processor 122 via an audio signal cable. The speaker 15 receives and plays audio signals output by the processor 122, which can be call voice signals, music signals, various prompt tone signals, etc. Positionally, the speaker 15 is located on the temple 12 near the ear, with the sound outlet facing outwards from the temple 12. The external structure of the speaker 15 is as follows... Figure 8 As shown.

[0047] This application takes into account that the speaker 15 generates electromagnetic interference signals during operation, which may affect the accuracy of capacitance detection through spatial radiation or circuit conduction. To further address this issue, such as... Figure 9 As shown, the FPC 14 is designed to include a wear detection electrode area 141 and an isolation electrode area 142. The wear detection electrode area 141 faces the user's skin when worn. The metal tail pin 130 is electrically connected to the sensor 123 through the wear detection electrode area 141. The isolation electrode area 142 shares a common ground with the circuit board 121. The isolation electrode area 142 can be bent relative to the wear detection electrode area 141, and after bending, the isolation electrode area 141 isolates the wear detection electrode area 141 from the speaker 15.

[0048] The isolation electrode region 142 refers to the area in FPC 14 that shares a ground with circuit board 121 and has electromagnetic shielding function. Specifically, it can be achieved by combining a copper foil cover layer and a grounding line. By sharing a ground with circuit board 121, the electromagnetic interference signal of speaker 15 is guided to the ground line of circuit board 121 to form electromagnetic shielding. The bendability characteristic means that this region has a flexible substrate and a bending groove structure, such as a V-shaped groove on a polyimide substrate, so that this region can be bent to form a physical isolation barrier.

[0049] The capacitive detection circuit formed by the metal tail pin 130 and the wear detection electrode area 141 serves as the wear detection unit. Specifically, the metal tail pin 130 acts as the capacitor plate, and the conductive lines of the wear detection electrode area 141 are connected to the sensor 123 to form a detection path. It should be noted that... Figure 9The wear detection electrode area 141 shows two sub-electrode areas, A1 and A2. Both sub-electrode areas A1 and A2 are electrically connected to the sensor 123, but only sub-electrode area A2 is electrically connected to the metal tail pin 130. In the wearing state, both sub-electrode areas A1 and A2 can contact the user's skin, so the sensor 123 can obtain capacitance parameter signals from both sub-electrode areas A1 and A2. The reason for dividing the wear detection electrode area 141 into two detection areas is that the signals from these two areas are sent to the sensor 123 through channels ch4 and ch5 respectively, making it easier for the processor 122 to determine the source of the capacitance parameter signal. If there is a signal in channel ch5, or both ch4 and ch5 have signals, it can be preliminarily considered that the wear state is active. If only channel ch4 has a signal, it can be preliminarily considered that it is caused by contact with the user's skin outside the ear area, such as the user's finger touching area A1. Of course, two or more sub-electrode regions can be divided in the wearing detection electrode region 141, and the metal tail pin 130 can be electrically connected to the sensor 123 through one of the sub-electrode regions, while the remaining sub-electrode regions only need to be electrically connected to the sensor 123.

[0050] When a user wears glasses, the metal pin 130 contacts the skin around the ear, creating an equivalent capacitance change. The sensor 123 collects capacitance parameters through the electrode wiring of the wear detection electrode area 141. At this time, the isolation electrode area 142 forms a physical barrier perpendicular to the sound output direction of the speaker 15 by bending, blocking electromagnetic interference signals from directly propagating to the wear detection electrode area 142. Therefore, the shielding effect of the isolation electrode area 142 can effectively filter out the interference noise generated by the speaker 15, ensuring that the capacitance change only reflects the true wearing state.

[0051] Figure 10A and Figure 10B The diagrams show a comparison of electromagnetic interference signals before and after the isolation electrode region 142 is set at the sound outlet of the speaker 15. It can be seen that the isolation electrode region 142 can introduce electromagnetic interference signals to the ground wire of the smart glasses, ensuring that the capacitance detection signal is not disturbed during the audio signal output process.

[0052] To ensure the isolation effect of electromagnetic interference signals of the speaker 15, the size of the isolation electrode area 142 is preferably not smaller than the size of the speaker 15. Provided that there is enough space inside the temple 12, the larger the size of the isolation electrode area 142, the better, so that the isolation electrode area 142 can completely block the speaker 15.

[0053] Furthermore, the isolation electrode region 142 can be bent to an angle parallel to the wear detection electrode region 142. Specifically, the bending guide structure can be achieved by pre-cutting a V-groove or laser engraving a thinning layer. After bending, the plane of the isolation electrode region 142 and the plane of the wear detection electrode region 141 form a parallel state within the range of 0-10 degrees. Figure 11 A schematic diagram of the isolation electrode region 142 after bending is shown.

[0054] Please continue reading. Figure 9 The wear detection electrode area 141 and the isolation electrode area 142 can be connected via a bendable portion 143. The ground wire of the isolation electrode area 142 is connected to the ground wire of the circuit board 121 via the bendable portion 143 and the wear detection electrode area 141. After the ground wire is transmitted to the wear detection electrode area 141 through the bendable portion 143, it forms a low-impedance path with the ground wire of the circuit board 121, effectively eliminating signal interference caused by poor grounding. During the process of sensor 123 acquiring capacitance parameters, this structure not only blocks the propagation path of electromagnetic signal interference from speaker 15, but also reduces signal transmission noise by optimizing the ground wire routing path.

[0055] Furthermore, as an example, such as Figure 13 As shown, the metal tail pin 130 is connected to the FPC 14 via a conductor spring pin 16. (See reference...) Figure 14 The conductor spring pin 16 includes a first conductor segment 161 and a second conductor segment 162 connected in an L-shape. The first conductor segment 161 is welded to the wearing detection electrode area 141. The end of the second conductor segment 162 adopts an elastic contact T. The elastic contact T abuts against the metal tail pin 130 and is then fixed together to the tail end of the temple 12.

[0056] Figure 15 A schematic diagram shows the FPC 14 bent and assembled with the speaker 15. Figure 16 It shows in Figure 15 This is a schematic diagram showing how FPC 14 is bonded to circuit board 121. Figure 17 for Figure 16 Side view.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smart glasses having a wearing detection function, characterized by comprising: The device includes a frame, two temples, and at least one temple has a circuit board installed inside. The circuit board has at least one processor and at least one sensor connected to the processor. At least one temple is fixedly connected to a metal tail pin at its tail end, and the metal tail pin is electrically connected to the sensor via an FPC. The sensor is used to collect capacitance parameters of the equivalent capacitance formed by the metal tail needle and the user's skin. The processor is used to determine whether the smart glasses are being worn based on the capacitance parameters.

2. The smart glasses with a wearing detection function according to claim 1, wherein The smart glasses also include a speaker connected to the processor via an audio signal cable; The FPC includes a wear detection electrode area and an isolation electrode area. The wear detection electrode area is used to face the user's skin when worn, and the metal tail pin is electrically connected to the sensor through the wear detection electrode area. The isolation electrode area shares a common ground with the circuit board. The isolation electrode area can be bent relative to the wear detection electrode area, and after bending, the isolation electrode area isolates the wear detection electrode area from the speaker.

3. The smart glasses with a wearing detection function according to claim 2, wherein The wear detection electrode region includes two or more sub-electrode regions; The metal tail pin is electrically connected to the sensor through one of the sub-electrode regions, and the remaining sub-electrode regions are electrically connected to the sensor. The sensor is also used to collect capacitance parameters of the equivalent capacitance formed by the remaining sub-electrode areas and the user's skin, and send the collected capacitance parameters to the processor, which determines whether the smart glasses are being worn based on the capacitance parameters.

4. The smart glasses with a wearing detection function according to claim 2, wherein The metal tail pin is connected to the FPC via a conductor spring pin; the conductor spring pin includes a first conductor segment and a second conductor segment connected in an L-shape. The first conductor segment is welded to the wear detection electrode area; The end of the second conductor segment is an elastic contact, which abuts against the metal tail pin and is then fixed together to the tail end of the temple. 5.The smart glasses with a wearing detection function according to claim 2, wherein, The size of the isolation electrode region is not smaller than the size of the speaker. 6.The smart glasses with a wearing detection function according to claim 2, wherein, The isolation electrode area can be bent to an angle parallel to the wear detection electrode area.

7. The smart glasses having a wearing detection function according to claim 2, wherein The wear detection electrode area and the isolation electrode area are connected by a bendable portion, and the ground wire of the isolation electrode area is connected to the ground wire of the circuit board in sequence through the bendable portion and the wear detection electrode area. 8.The smart glasses with a wearing detection function according to claim 1, wherein, The FPC also includes a touch detection electrode area electrically connected to the sensor; The touch detection electrode area is used to sense the user's touch operation; The sensor is also used to convert the user's operation in the touch detection electrode area into an electrical signal; The processor is used to control the smart glasses according to the electrical signal. 9.The smart glasses with a wearing detection function according to claim 1, wherein, The metal tail pin is fixedly connected to the end of the temple by injection molding.

10. The smart glasses with a wearing detection function according to claim 9, wherein, The metal tail pin has a through hole at one end near the temple for injection molding.

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