Wearing detection flexible circuit board and wearable audio output device

Abstract

The utility model discloses a wearing detection flexible circuit board and wearable audio output equipment. Wherein the flexible circuit board comprises a reference channel part and a detection channel part; the flexible circuit board is fixedly connected with a target cover plate of the wearable audio output equipment based on the detection channel part, and when a user uses the wearable audio output equipment, the target cover plate is attached to the face of the user. The wearing detection flexible circuit board can realize relatively accurate wearing detection and synchronous control of playing and pausing based on the detection area, so that a user can realize automatic audio playing and pausing only by wearing and taking down the audio output equipment in most cases, and the use of the user is facilitated. Besides, the flexible circuit board enables the detection channel and the reference channel to be arranged in the central area of the execution area through the setting of the size and the shape of the flexible circuit board, thereby preventing sweat or rainwater from flowing to the areas where the detection channel and the reference channel are located as much as possible, and reducing the probability of occurrence of an automatic control false triggering condition.

Description

Technical Field

[0001] This application relates to the field of audio output device technology, specifically to a wear detection flexible circuit board and a wearable audio output device. Background Technology

[0002] In current related technologies, in the actual application of wearable audio output devices with skin contact, such as bone conduction headphones, the switching control function for switching between playing and pausing the current audio generally requires the user to manually operate the operation buttons (knobs) set on the audio playback device or wearable audio output device. However, considering the application scenario of bone conduction headphones, in most cases, the user does not have the opportunity to perform operations on the operation buttons (knobs) set on the audio playback device or wearable audio output device. Summary of the Invention

[0003] This application provides a wear detection flexible circuit board and a wearable audio output device.

[0004] The wear detection flexible circuit board according to the embodiments of this application is applied to a wearable audio output device, and the flexible circuit board includes a reference channel portion and a detection channel portion;

[0005] The detection channel is configured to detect a first temperature to achieve synchronous control of device wearing and audio playback, and the reference channel is configured to detect a second temperature to reduce the failure probability of the synchronous control through temperature compensation.

[0006] The flexible circuit board is fixedly connected to the target cover of the wearable audio output device based on the detection channel portion, wherein the target cover fits against the user's face when the user uses the wearable audio output device.

[0007] In some embodiments, the first region of the flexible circuit board is elliptical with straight edges, the detection channel is disposed on the first surface of the first region of the flexible circuit board, and the reference channel is disposed on the second surface of the first region.

[0008] In some embodiments, the circuit board further includes a wiring section, which includes a trace area and a functional area. The trace area is arranged on a first surface of a second region on the flexible circuit board. The detection channel is electrically connected to the functional area via a first connecting line in the trace area, and the reference channel is electrically connected to the functional area via a second connecting line in the trace area.

[0009] The functional area is configured to control the detection channel to detect the first temperature and to control the reference channel to detect the second temperature.

[0010] In some embodiments, the wiring section further includes a junction area, which is arranged on a first surface and a second surface of the second region. On the first surface of the second region, the junction area is configured as a first junction area and a second junction area. The distance between the first junction area and the first connecting line is equal to the distance between the second junction area and the second connecting line. There is a preset quantitative relationship between the distance between the first junction area and the first connecting line and the distance between the first connecting line and the second connecting line.

[0011] In some implementations, the distance between the first contact area and the first connecting line is four times the distance between the first connecting line and the second connecting line.

[0012] In some embodiments, the detection channel portion is one or more detection sub-regions. When the detection channel portion is multiple detection sub-regions, adjacent regions are electrically connected; the distance between any edge of any detection sub-region and any edge of the first region is greater than or equal to a preset distance.

[0013] The detection channel is provided with a grid of copper foil arranged at an angle, the grid having a first preset grid spacing and a preset grid angle.

[0014] In some embodiments, the reference channel portion is one or more reference sub-regions, and each reference sub-region in the reference channel portion has a unique positional correspondence with each detection sub-region in the detection channel portion;

[0015] The reference channel is provided with a conductor grid arranged at an angle, and the angle of the conductor grid is the preset angle of the grid.

[0016] The conductor grid has a second preset grid spacing, which is configured to cooperate with the first preset grid spacing so that the grid-shaped copper foil and the conductor grid meet preset size requirements.

[0017] In some embodiments, the first preset grid spacing is 0.1 mm, and the preset grid angle is 45 degrees.

[0018] In some embodiments, the circuit board further includes a wiring section, which includes a routing area and a functional area. The routing area is arranged on a first surface of a second region on the flexible circuit board. The routing area includes multiple sets of first connecting lines and multiple sets of second connecting lines. Each detection sub-region is connected to the functional area through a set of first connecting lines, and each reference sub-region is connected to the functional area through a set of second connecting lines.

[0019] In some embodiments, the circuit board further includes a grounding area disposed on a first surface and a second surface of the second region. On the first surface of the second region, the grounding area is configured as one or more first grounding areas and two second grounding areas. The trace area is disposed between the first grounding area and an adjacent second grounding area, or between two adjacent sets of first grounding areas.

[0020] In some embodiments, when the wiring area is arranged between the first junction area and the adjacent second junction area, the distance between the first junction area and the first connecting line is equal to the distance between the second junction area and the second connecting line, and the distance between the first junction area and the first connecting line is four times that between the first connecting line and the second connecting line.

[0021] In some embodiments, when the wiring area is arranged between two adjacent sets of first contact areas, the distance between the first contact area A and the first connecting line is equal to the distance between the first contact area B and the second connecting line, and the distance between the first contact area A and the first connecting line is four times the distance between the first connecting line and the second connecting line.

[0022] Thus, the wear detection flexible circuit board provided in this embodiment can perform temperature detection based on the detection area with angled grid-like copper foil, and perform compensated temperature detection based on the angled wires arranged in a cooperative manner with the aforementioned angled grid-like copper foil. Utilizing the detection results of both, relatively accurate wear detection is achieved, allowing the audio output device to synchronously control the current audio playback and pause based on the wear detection results. This enables users to achieve automatic audio playback and pause in most cases without manual operation, simply by wearing and removing the audio output device, thus facilitating user convenience. Furthermore, the flexible circuit board in this embodiment also places the detection channel and reference channel in the central area of ​​the execution area through its size and shape design, thereby minimizing the possibility of sweat or rainwater flowing into the detection channel and reference channel area, and reducing the probability of false triggering of automatic control.

[0023] The wearable audio output device in this application includes a first output section, which is configured to fit the user's left ear.

[0024] The wearable audio output device also includes a second output unit configured to fit the user's right ear;

[0025] The first output section is equipped with a first flexible circuit board, and the second output section is equipped with a second flexible circuit board. The first flexible circuit board and the second flexible circuit board are the wear detection flexible circuit boards.

[0026] In some embodiments, the first output section is provided with a first target cover plate, and the detection channel section of the first flexible circuit board is bonded to the side of the first target cover plate away from the user's face.

[0027] The second output section is provided with a second target cover plate, and the detection channel section of the second flexible circuit board is bonded to the side of the second target cover plate away from the user's face.

[0028] Thus, the wearable audio output device in this application embodiment is equipped with the flexible circuit board described above in the output section corresponding to the left and right ears. Wearing detection can be performed simultaneously on both sides to avoid accidental triggering of switching control caused by wearing or removing one side at a time.

[0029] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the front side of the flexible circuit board for wearing detection in the embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure on the back of the flexible circuit board for wearing detection in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram showing the dimensions of the grid-like copper foil inside the detection channel in the embodiment of this application;

[0034] Figure 4 This is a schematic diagram showing the dimensions of the conductor mesh within the reference channel section in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram showing the spacing between the connecting line and the junction area in the embodiments of this application.

[0036] Wherein: 10, Execution area; 101, Detection channel section; 102, Reference channel section; 1021, Reference channel connection endpoint; 20, Function support area; 201, Detection channel connection line; 202, Reference channel connection line; 203, First connection area; 204, Second connection area. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0038] The wear detection flexible circuit board in this application embodiment is applied to a wearable audio output device. The flexible circuit board includes a reference channel portion 102 and a detection channel portion 101.

[0039] The detection channel 101 is configured to detect a first temperature to achieve synchronous control of device wearing and audio playback, and the reference channel 102 is configured to detect a second temperature to reduce the probability of synchronous control failure through temperature compensation.

[0040] The flexible circuit board is fixedly connected to the target cover of the wearable audio output device based on the detection channel 101, wherein the target cover fits against the user's face when the user uses the wearable audio output device.

[0041] Specifically, the wear detection flexible circuit board (hereinafter referred to as FPC) in the embodiments of this application is mainly installed in wearable audio output devices such as bone conduction headphones that can fit against the user's face. Its main function is to automatically control the playback or pause of the current audio file of the audio playback device while the device is being put on or taken off through wear detection.

[0042] To achieve the aforementioned wear detection function, the FPC, exemplarily, includes two parts: a detection channel section 101 and a reference channel section 102. The main function of the detection channel section 101 is to detect temperature changes in its environment. When a positive temperature change exceeding a preset standard is detected, it can be determined that the user is wearing the wearable audio output device. At this time, the FPC can transmit a positive temperature detection signal to the main control circuit of the wearable audio output device, so that the wearable audio output device and the audio playback device can cooperate to control the playback of the current audio file.

[0043] Conversely, when the detection channel 101 detects a negative temperature change that exceeds the preset standard, it can be determined that the user has removed the wearable audio output device from their ear. At this time, the FPC can transmit a negative temperature detection signal to the main control circuit of the wearable audio output device so that the wearable audio output device and the audio playback device can cooperate to control the pause or stop playback of the current audio file.

[0044] Furthermore, since there are many situations where the temperature of the environment where the detection channel 101 is located changes besides the user wearing or removing the wearable audio output device, the FPC in this embodiment is also provided with a reference channel 102 to improve the accuracy of generating a positive temperature detection signal and avoid false triggering of automatic control. The main function of the reference channel 102 is to detect temperature changes in its environment and compensate for the temperature detection results of the detection channel 101, thereby improving the accuracy of wear detection and reducing the probability of false triggering of automatic audio playback or pause control when a temperature change is detected, thus reducing the probability of synchronization control failure through temperature compensation.

[0045] Please see Figure 1 as well as Figure 2 In some embodiments, the first region of the flexible circuit board is a straight-edged elliptical ring, the detection channel 101 is disposed on the first surface of the first region of the flexible circuit board, and the reference channel 102 is disposed on the second surface of the first region.

[0046] Please see Figure 1 as well as Figure 3 In some embodiments, the detection channel 101 is one or more detection sub-regions. When the detection channel 101 is multiple detection sub-regions, adjacent detection sub-regions are electrically connected. The distance between any edge of any detection sub-region and any edge of the first region is greater than or equal to a preset distance.

[0047] The detection channel section 101 is provided with a grid-like copper foil arranged at an angle, the grid-like copper foil having a first preset grid spacing and a preset grid angle.

[0048] Please see Figure 2 as well as Figure 4 In some embodiments, the reference channel section 102 is one or more reference sub-regions. When the reference channel section 102 is multiple reference sub-regions, adjacent reference sub-regions are electrically connected, and each reference sub-region in the reference channel section 102 has a unique positional correspondence with each detection sub-region in the detection channel section 101.

[0049] The reference channel section 102 is provided with a conductor grid arranged at an angle, and the angle of the conductor grid is a preset grid angle;

[0050] The conductor grid has a second preset grid spacing, which is configured to cooperate with the first preset grid spacing so that the grid-shaped copper foil and the conductor grid meet the preset size requirements.

[0051] In some implementations, the first preset grid spacing is 0.1 mm and the preset grid angle is 45 degrees.

[0052] Specifically, based on the above-described embodiments, the FPC is divided into an execution area 10 (corresponding to the first area) and a function support area 20 (corresponding to the second area) according to its shape and function. Considering the shape of the wearable audio output device, in order to adapt the FPC to the shape described above, in some examples, the shape of the execution area 10 is set to a straight-sided ellipse, that is, a shape similar to the outer contour of a standard athletic track. Meanwhile, in order for the arrangement of the detection channel 101 and the reference channel 102 to achieve their corresponding technical objectives, wiring can be provided on both sides of the FPC. For example, the detection channel 101 is located on one side of the execution area 10, and the reference channel 102 is located on the other side of the execution area 10. For ease of description, the side where the detection channel 101 is located is the front side of the execution area 10, and the side where the reference channel 102 is located is the back side of the execution area 10.

[0053] In some examples, to reduce the probability of false triggering of automatic control, the detection channel 101 is configured with one or more detection sub-regions. When the detection channel 101 includes multiple detection sub-regions, each adjacent detection sub-region is electrically connected, thereby ensuring that multiple detection sub-regions constitute a complete detection channel 101. Furthermore, the detection channel 101 must ensure that the distance between the edge of any detection sub-region and the edge of the execution area 10 is always greater than a preset threshold, thereby ensuring that all the detection sub-regions are located in the center of the execution area 10. This configuration can minimize the shape and range of the detection channel 101 while ensuring the accuracy of wear detection, thus minimizing the amount of sweat or rainwater flowing into the detection channel and the reference channel area. In addition, to improve the accuracy and sensitivity of temperature detection, the detection channel 101 is provided with an angled grid of copper foil, preferably at 45 degrees, but other angles can also be set. Compared to vertically distributed grids of copper foil, angled grids of copper foil can effectively cover most of the FPC execution area 10. The grid spacing of the copper foil (corresponding to the first preset grid spacing) is preferably 0.1 mm, in order to improve the accuracy of temperature detection during wear detection. The grid spacing can also be adjusted to other values ​​according to the actual situation, and this application does not make specific limitations.

[0054] In some examples, as described in the above embodiments, in order to improve the accuracy of wear detection, a reference channel 102 is provided on the back of the execution area 10. Its main function is to compensate for the temperature detection result of the detection channel 101 with its own temperature detection result, so as to eliminate other situations that cause temperature changes besides the user wearing or removing the audio output device. Please refer to Figure 4 , Figure 4 The reference channel section 102 shown, like the detection channel section 101, includes one or more reference sub-regions. The number, position, and size of the reference sub-regions uniquely correspond to those of the detection channel section 101. The reference channel section 102 and the detection channel section 101 can be aligned on both sides of the execution area 10. It should be noted that when the reference channel section 102 includes multiple reference sub-regions, each adjacent reference sub-region maintains an electrical connection. The reference channel section 102 is provided with an angled conductor grid, typically distributed at a 45-degree angle. Compared to a vertically distributed grid, the angled grid effectively covers most of the FPC execution area 10 and works in conjunction with the detection channel section 101 to compensate for temperature detection within the entire area of ​​the detection channel section 101, thereby improving the accuracy of wear detection. Furthermore, the spacing of the conductor grid (corresponding to the second preset grid spacing) is generally set to 1.4 mm. This spacing ensures that the conductor network lines of the reference channel 102 are closely adjacent to the connecting lines of each copper foil in the detection channel 101 (corresponding to the grid-shaped copper foil and the conductor grid meeting the preset size requirements). When the angle and spacing of the grid-shaped copper foil in the detection channel 101 change, the spacing of the conductor grid also needs to be adjusted accordingly to ensure that the conductor network lines of the reference channel 102 are closely adjacent to the connecting lines of each copper foil in the detection channel 101.

[0055] Please refer to it again. Figure 1 as well as Figure 2 In some embodiments, the circuit board further includes a wiring section, which includes a routing area and a functional area. The routing area is arranged on the first side of the second region on the flexible circuit board. The detection channel section 101 is electrically connected to the functional area via a first connection line in the routing area, and the reference channel section 102 is electrically connected to the functional area via a second connection line in the routing area.

[0056] The functional area is configured to control the detection channel 101 to detect the first temperature and to control the reference channel 102 to detect the second temperature.

[0057] In some embodiments, the wiring unit further includes a junction area, which is arranged on the first and second surfaces of the second region. On the first surface of the second region, the junction areas are configured as a first junction area 203 and a second junction area 204. The distance between the first junction area 203 and the first connecting line is equal to the distance between the second junction area 204 and the second connecting line. There is a preset quantitative relationship between the distance between the first junction area 203 and the first connecting line and the distance between the first connecting line and the second connecting line.

[0058] In some implementations, the distance between the first contact area 203 and the first connecting line is four times the distance between the first connecting line and the second connecting line.

[0059] Specifically, based on the above-described embodiments, in addition to the execution area 10, the FPC also includes a function support area 20. The function support area 20 is generally elongated to facilitate the routing of connecting lines from the execution area 10. The function support area 20 includes a wiring section. The main function of the wiring section is to accommodate and arrange connecting lines to connect the detection channel 101 and the reference channel 102 in the above embodiments to the corresponding control chips. In addition, the wiring section also includes a functional area (not shown in the figure), which accommodates the control chip and further connects the control chip to the main control circuit of the audio output device. This allows the temperature detection results obtained by the detection channel 101 and the reference channel 102 to be transmitted to the main control circuit of the audio output device, facilitating automatic control of audio playback and pause as the device is worn or removed.

[0060] In some examples, in addition to the functional area, the wiring section includes a routing area and a junction area. The junction area is arranged on both sides of the functional support area 20. On the front side of the functional support area 20 (i.e., the side where the detection channel section 101 is located), the junction area is arranged along the two long edges and the central area of ​​the functional support area 20. See details. Figure 1 On the opposite side of the functional support area 20 (i.e., the side where the reference channel section 102 is located), the contact area is arranged close to the edge of the area along the extension direction of the functional support area 20, as detailed in the reference section. Figure 2 All parts of the aforementioned grounding areas are grounded. The wiring area is located on the front of the functional support area 20 (i.e., on the side where the detection channel section 101 is located), specifically between adjacent grounding areas within the functional support area 20. See [link to documentation] for details. Figure 1 .

[0061] The wiring area includes a detection channel connection line 201 (corresponding to the first connection line) and a reference channel connection line 202 (corresponding to the second connection line). The detection channel connection line 201 is configured to connect the detection channel section 101 to the functional area, and the reference channel connection line 202 is configured to connect the reference channel section 102 to the functional area. For example, please refer to [reference needed]. Figure 1 A reference channel connection endpoint 1021 is provided on the detection channel section 101 so that the reference channel section 102 can be connected to the reference channel connection line 202 on the front side of the execution area 10. It should be noted that when both the detection channel section 101 and the reference channel section 102 include multiple rectangular areas, a reference channel connection endpoint 1021 is provided in each rectangular area of ​​the detection channel section 101, and all reference channel connection endpoints 1021 are electrically connected to each other, so that all rectangular areas of the reference channel section 102 are connected to the reference channel connection line 202.

[0062] To minimize the risk of accidental touches, short circuits, or other board-level wiring irregularities, the numerical or quantitative relationships of the spacing between the test channel connection line 201 and the reference channel connection line 202, between the test channel connection line 201 and the grounding area, and between the reference channel connection line 202 and other circuits should be preset. Please refer to [link / reference] for details. Figure 5 , Figure 5 In the middle, the junction area located in the center is the first junction area 203, and the junction areas located above and below are the second junction areas 204, and so on. Figure 5 Taking the portion between the first contact area 203 and the upper second contact area 204 as an example, the lower connecting line is the detection channel connecting line 201, and the upper connecting line is the reference channel connecting line 202. In the above example, if the distance between the detection channel connecting line 201 and the reference channel connecting line 202 is set to 'd', then the distances between the first contact area 203 and the detection channel connecting line 201, and between the second contact area 204 and the reference channel connecting line 202, are equal, both being 4d. The value of 'd' is generally determined based on the dimensions of the detection channel portion 101 and the reference channel portion 102 within the execution area 10, and the dimensions of the functional support area 20. For example, Figure 5 In the illustrated case, d is 0.07 mm, meaning the distance between the detection channel connection line 201 and the reference channel connection line 202 is 0.07 mm. The distance between the first contact area 203 and the detection channel connection line 201 is 4d, or 0.28 mm, and the distance between the second contact area 204 and the reference channel connection line 202 is also 4d, or 0.28 mm. For Figure 5 The portion between the first contact area 203 and the second contact area 204 located below is symmetrical to the example above.

[0063] In some embodiments, the circuit board further includes a wiring section, which includes a routing area and a functional area. The routing area is arranged on the first side of the second region on the flexible circuit board. The routing area includes multiple sets of first connecting lines and multiple sets of second connecting lines. Each detection sub-region is connected to the functional area through a set of first connecting lines, and each reference sub-region is connected to the functional area through a set of second connecting lines.

[0064] In some embodiments, the circuit board further includes a grounding area, which is arranged on a first side and a second side of the second region. On the first side of the second region, the grounding area is configured as one or more first grounding areas 203 and two second grounding areas 204. The trace area is arranged between the first grounding area 203 and the adjacent second grounding area 204, or between two adjacent sets of first grounding areas 203.

[0065] In some embodiments, when the wiring area is arranged between the first junction area 203 and the adjacent second junction area 204, the distance between the first junction area 203 and the first connecting line is equal to the distance between the second junction area 204 and the second connecting line, and the distance between the first junction area 203 and the first connecting line is four times that between the first connecting line and the second connecting line.

[0066] In some embodiments, when the wiring area is arranged between two adjacent sets of first connection areas 203, the distance between the first connection area A and the first connecting line is equal to the distance between the first connection area B and the second connecting line, and the distance between the first connection area A and the first connecting line is four times the distance between the first connecting line and the second connecting line.

[0067] Specifically, please refer to the following: Figure 1 To enable each detection sub-region and reference sub-region to be independently connected to the functional area, thereby allowing each detection sub-region and reference sub-region to operate relatively independently and maximizing the reliability of the wear detection process, in some examples, within the wiring area of ​​the above embodiments, a separate set of detection channel connection lines 201 and a corresponding set of reference channel connection lines 202 are provided for each detection sub-region and its corresponding reference sub-region. Simultaneously, according to the wiring method proposed in the above embodiments, grounding areas are arranged on both sides of the wiring area containing the aforementioned set of detection channel connection lines 201 and reference channel connection lines 202. For example, if the detection channel connection lines 201 and their corresponding reference channel connection lines 202 are close to the edge of the functional support area 20, then the grounding areas on both sides of these two connection lines are the second grounding area 204 located at the edge of the functional support area 20 and the first grounding area 203 located in the central area of ​​the functional support area 20. In other examples, if the detection channel connection line 201 and the corresponding reference channel connection line 202 are located in the central region of the function support area 20, then the junction areas set on both sides of the two connection lines are a pair of adjacent first junction areas 203 set in the central region of the function support area 20.

[0068] by Figure 1 Taking the illustrated example, execution area 10 contains two sets of detection sub-regions and two sets of corresponding reference sub-regions. Therefore, two adjacent routing areas need to be arranged within function execution area 20. A shared first contact area 203 is set at the edge of the two routing areas, and a second contact area 204 is set on each of the two edges of function execution area 20. Thus, a routing area is formed between the adjacent first contact area 203 and second contact area 204. Please refer to [link / reference]. Figure 1 ,lie in Figure 1The area between the second contact area 204 and the first contact area 203 forms a wiring area. Within this wiring area, the lower connecting line is the detection channel connecting line 201, and the upper connecting line is the reference channel connecting line 202. Please refer to further details. Figure 5 In the example above, if the distance between the detection channel connection line 201 and the reference channel connection line 202 is set to d, then the distances between the first contact area 203 and the detection channel connection line 201, and between the second contact area 204 and the reference channel connection line 202, are equal, both being 4d. The value of d is generally determined based on the dimensions of the detection channel section 101 and the reference channel section 102 within the execution area 10, and the dimensions of the functional support area 20. For example, Figure 5 In the case shown, d is 0.07mm, that is, the distance between the detection channel connection line 201 and the reference channel connection line 202 is 0.07mm, while the distance between the first contact area 203 and the detection channel connection line 201 is 4d, that is, 0.28mm, and the distance between the second contact area 204 and the reference channel connection line 202 is also 4d, that is, 0.28mm.

[0069] In other cases, if at least three sets of detection sub-regions and at least three sets of corresponding reference sub-regions are set within the execution area 10, then at least three sets of adjacent routing areas need to be arranged within the functional execution area 20. Assuming that the execution area 10 has three sets of detection sub-regions and three sets of corresponding reference sub-regions, then three sets of adjacent routing areas need to be arranged within the functional execution area 20. Two shared first contact areas 203 are set at the edges of the three routing areas, and a second contact area 204 is set at each of the two edges of the functional execution area 20. A routing area is formed between adjacent first contact areas 203 and second contact areas 204, and a routing area is also formed between adjacent first contact areas 203. Assuming two adjacent first contact areas 203 are arranged in the central area of ​​the functional support area 20, a wiring area is formed between first contact area A and first contact area B. A detection channel connection line 201 and a reference channel connection line 202 are arranged parallel to each other in this wiring area. Let's assume that first contact area A is adjacent to the detection channel connection line 201, and first contact area B is adjacent to the reference channel connection line 202. In the above example, if the distance between the detection channel connection line 201 and the reference channel connection line 202 is denoted as 'd', then the distances between first contact area A and the detection channel connection line 201, and between first contact area B and the reference channel connection line 202, are equal, both being 4d. The value of 'd' is generally determined based on the dimensions of the detection channel section 101 and the reference channel section 102 within the execution area 10, as well as the dimensions of the functional support area 20. For example, d is 0.07mm, that is, the distance between the detection channel connection line 201 and the reference channel connection line 202 is 0.07mm, while the distance between the first contact area 203 and the detection channel connection line 201 is 4d, that is, 0.28mm, and the distance between the second contact area 204 and the reference channel connection line 202 is also 4d, that is, 0.28mm.

[0070] Thus, the wear detection flexible circuit board provided in this embodiment can perform temperature detection based on the detection area with angled grid-like copper foil, and perform compensated temperature detection based on the angled wires arranged in a cooperative manner with the aforementioned angled grid-like copper foil. Utilizing the detection results of both, relatively accurate wear detection is achieved, allowing the audio output device to synchronously control the current audio playback and pause based on the wear detection results. This enables users to achieve automatic audio playback and pause in most cases without manual operation, simply by wearing and removing the audio output device, thus facilitating user convenience. Furthermore, the flexible circuit board in this embodiment also places the detection channel and reference channel in the central area of ​​the execution area through its size and shape design, thereby minimizing the possibility of sweat or rainwater flowing into the detection channel and reference channel area, and reducing the probability of false triggering of automatic control.

[0071] The wearable audio output device in this application includes a first output section, which is configured to fit the user's left ear.

[0072] The wearable audio output device also includes a second output unit configured to fit the user's right ear;

[0073] The first output section is equipped with a first flexible circuit board, and the second output section is equipped with a second flexible circuit board. The first flexible circuit board and the second flexible circuit board are the aforementioned wear detection flexible circuit boards.

[0074] Specifically, this application also provides a wearable audio output device incorporating the flexible circuit board described in the above embodiments. This wearable audio output device is generally an audio output device such as bone conduction headphones that fit snugly against the user's face. For example, the wearable audio output device generally includes a left ear output unit (corresponding to the first output unit) and a right ear output unit (corresponding to the second output unit), each output unit having a corresponding speaker assembly. Furthermore, the left ear output unit has a left FPC (corresponding to the first flexible circuit board), and the right ear output unit has a right FPC (corresponding to the second flexible circuit board), wherein both the left and right FPCs are flexible circuit boards as described in the above embodiments. In this way, the audio output device can utilize the flexible circuit boards to achieve wear detection, thereby enabling automatic control of audio playback / pause.

[0075] In some embodiments, the first output section is provided with a first target cover plate, and the detection channel section 101 of the first flexible circuit board is bonded to the side of the first target cover plate away from the user's face.

[0076] The second output section is provided with a second target cover plate, and the detection channel section 101 of the second flexible circuit board is bonded to the side of the second target cover plate away from the user's face.

[0077] Specifically, based on the above embodiments, in the audio output device described above, each output unit is provided with a target cover plate that conforms to the user's face. For example, the left ear output unit is provided with a left target cover plate (corresponding to the first target cover plate), and the right ear output unit is provided with a right target cover plate (corresponding to the second target cover plate). In use, the side of the left target cover plate facing the user's face is attached to the left side of the user's face, and the side of the right target cover plate facing the user's face is attached to the right side of the user's face. Therefore, according to the above embodiments, the left FPC is bonded to the side of the left target cover plate that faces away from the user's face, and the right FPC is bonded to the side of the right target cover plate that faces away from the user's face.

[0078] In this way, when the audio is not currently playing, if the user puts the left or right ear output unit into their ear while wearing the headphones, the FPC corresponding to that output unit will perform a wear detection. When the output unit is detected as being worn, the audio output device and audio playback device will automatically start playing the current audio. Conversely, if the user removes both output units within a preset time range, or removes only one output unit while wearing the headphones, the FPC corresponding to that output unit will perform a wear detection. When the output unit is detected as being removed from the ear, the audio output device and audio playback device will automatically pause or stop playing the current audio.

[0079] It should be noted that when the user wears the output units on both sides, if the user removes only one output unit, only one of the two FPCs will detect a negative temperature change. In this case, the audio output device and the audio playback device will continue to play. The audio will only stop playing when both output units are detected to have been removed.

[0080] Conversely, regardless of whether the user is wearing the output unit on one side or not, if the user is wearing the output unit on one side, only one of the two FPCs will detect a positive temperature change. Unlike the example above, the audio output device and the audio playback device will automatically control the current audio to pause or stop playback.

[0081] Thus, the wearable audio output device in this application embodiment is equipped with the flexible circuit board described above in the output section corresponding to the left and right ears. Wearing detection can be performed simultaneously on both sides to avoid accidental triggering of switching control caused by wearing or removing one side at a time.

[0082] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0083] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0084] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A wear detection flexible circuit board, characterized in that, The flexible circuit board is used in a wearable audio output device, and the flexible circuit board includes a reference channel and a detection channel. The detection channel is configured to detect a first temperature to achieve synchronous control of device wearing and audio playback, and the reference channel is configured to detect a second temperature to reduce the failure probability of the synchronous control through temperature compensation. The flexible circuit board is fixedly connected to the target cover of the wearable audio output device based on the detection channel portion, wherein the target cover fits against the user's face when the user uses the wearable audio output device.

2. The circuit board according to claim 1, characterized in that, The first region of the flexible circuit board is elliptical with straight edges. The detection channel is disposed on the first surface of the first region of the flexible circuit board, and the reference channel is disposed on the second surface of the first region.

3. The circuit board according to claim 1, characterized in that, The circuit board further includes a wiring section, which includes a routing area and a functional area. The routing area is arranged on the first side of the second region on the flexible circuit board. The detection channel section is electrically connected to the functional area via a first connecting line in the routing area, and the reference channel section is electrically connected to the functional area via a second connecting line in the routing area. The functional area is configured to control the detection channel to detect the first temperature and to control the reference channel to detect the second temperature.

4. The circuit board according to claim 3, characterized in that, The wiring section further includes a junction area, which is arranged on the first and second surfaces of the second region. On the first surface of the second region, the junction area is configured as a first junction area and a second junction area. The distance between the first junction area and the first connecting line is equal to the distance between the second junction area and the second connecting line. There is a preset quantitative relationship between the distance between the first junction area and the first connecting line and the distance between the first connecting line and the second connecting line.

5. The circuit board according to claim 4, characterized in that, The distance between the first contact area and the first connecting line is four times the distance between the first connecting line and the second connecting line.

6. The circuit board according to claim 2, characterized in that, The detection channel portion comprises one or more detection sub-regions. When the detection channel portion comprises multiple detection sub-regions, adjacent regions are electrically connected. The distance between any edge of any detection sub-region and any edge of the first region is greater than or equal to a preset distance. The detection channel is provided with a grid of copper foil arranged at an angle, the grid having a first preset grid spacing and a preset grid angle.

7. The circuit board according to claim 6, characterized in that, The reference channel section is one or more reference sub-regions, and each reference sub-region in the reference channel section has a unique positional correspondence with each detection sub-region in the detection channel section; The reference channel is provided with a conductor grid arranged at an angle, and the angle of the conductor grid is the preset angle of the grid. The conductor grid has a second preset grid spacing, which is configured to cooperate with the first preset grid spacing so that the grid-shaped copper foil and the conductor grid meet preset size requirements.

8. The circuit board according to claim 6 or 7, characterized in that, The first preset grid spacing is 0.1 mm, and the preset grid angle is 45 degrees.

9. The circuit board according to claim 7, characterized in that, The circuit board further includes a wiring section, which includes a routing area and a functional area. The routing area is arranged on the first side of the second region on the flexible circuit board. The routing area includes multiple sets of first connecting lines and multiple sets of second connecting lines. Each detection sub-region is connected to the functional area through a set of first connecting lines, and each reference sub-region is connected to the functional area through a set of second connecting lines.

10. The circuit board according to claim 9, characterized in that, The circuit board also includes a grounding area, which is arranged on a first surface and a second surface of the second region. On the first surface of the second region, the grounding area is configured as one or more first grounding areas and two second grounding areas. The trace area is arranged between the first grounding area and an adjacent second grounding area, or between two adjacent sets of first grounding areas.

11. The circuit board according to claim 10, characterized in that, When the wiring area is arranged between the first junction area and the adjacent second junction area, the distance between the first junction area and the first connecting line is equal to the distance between the second junction area and the second connecting line, and the distance between the first junction area and the first connecting line is four times that between the first connecting line and the second connecting line.

12. The circuit board according to claim 10, characterized in that, When the wiring area is arranged between two adjacent sets of first contact areas, the distance between the first contact area A and the first connecting line is equal to the distance between the first contact area B and the second connecting line, and the distance between the first contact area A and the first connecting line is four times the distance between the first connecting line and the second connecting line.

13. A wearable audio output device, characterized in that, The wearable audio output device includes a first output section configured to fit the user's left ear; The wearable audio output device also includes a second output unit configured to fit the user's right ear; The first output section is equipped with a first flexible circuit board, and the second output section is equipped with a second flexible circuit board. The first flexible circuit board and the second flexible circuit board are wear detection flexible circuit boards as described in any one of claims 1-12.

14. The audio output device according to claim 13, characterized in that, The first output section is provided with a first target cover plate, and the detection channel section of the first flexible circuit board is bonded to the side of the first target cover plate away from the user's face. The second output section is provided with a second target cover plate, and the detection channel section of the second flexible circuit board is bonded to the side of the second target cover plate away from the user's face.

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