Earphone detection device, earphone socket and electronic equipment
By using a capacitor and capacitance monitoring module in the headphone jack to monitor capacitance changes, the problem of false detection caused by easily deformable metal springs and foreign objects is solved, achieving more accurate headphone insertion and removal status recognition, and improving user experience and device design.
Patent Information
- Application Number
- CN202520110405.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In existing technologies, metal contacts in headphone jacks are prone to deformation or foreign objects, leading to misjudgments in headphone insertion/removal status detection and affecting user experience.
A capacitor and capacitance monitoring module are used to identify the insertion and removal status by monitoring the capacitance change during the insertion of the headphone plug, thus avoiding abnormal deformation of the metal spring and the influence of foreign objects.
It improves the effectiveness of headphone insertion and removal status recognition, reduces false alarms, enhances user experience, and saves space.
Smart Images
Figure CN223928453U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of headphone technology, specifically to a headphone detection device, headphone jack, and electronic device. Background Technology
[0002] With the development of communication technology, electronic devices are being used in increasingly diverse scenarios and applications, and users have increasingly personalized needs and higher requirements for their functions and performance. Among various electronic products, headphone jacks are used to connect wired headphone plugs, enabling human-computer interaction for audio information. Therefore, monitoring the process of connecting headphones by inserting them into the headphone jack is essential.
[0003] Currently, headphone jacks typically contain metal contacts. The insertion / removal status is determined by monitoring changes in the electrical signal caused by the contact's contact point. However, metal contacts are easily deformable, and users require high durability from repeated insertions and removals. If the contact doesn't deform significantly after prolonged use, the headphone insertion / removal status detection will fail, leading to misjudgments. Furthermore, the contact point is limited by the physical contact area. If foreign objects are present, the contact point may not make contact, further malfunctioning the detection and causing misjudgments. This negatively impacts the user experience. Utility Model Content
[0004] To address the aforementioned technical problems, this disclosure provides an earphone detection device.
[0005] In a first aspect, this disclosure provides an earphone detection device, comprising: a capacitor and a capacitance monitoring module connected to each other;
[0006] The capacitor includes a first capacitor plate, and when the headphone plug is inserted into the headphone jack, the headphone plug has a projected area on the plane where the first capacitor plate is located.
[0007] The capacitance monitoring module is used to monitor the capacitance of the capacitor, wherein the capacitance of the capacitor is used to determine the insertion / removal status of the headphone plug.
[0008] Optionally, when the headphone plug is inserted into the headphone jack, the headphone plug serves as another capacitor plate of the capacitor, and a dielectric is further included between the two capacitor plates of the capacitor.
[0009] Optionally, the first capacitor plate is located on the wall of the headphone hole of the headphone jack.
[0010] Optionally, the angle between the first capacitor plate and the headphone plug is within a first preset angle range.
[0011] Optionally, the capacitor further includes a second capacitor plate, wherein the first capacitor plate and the second capacitor plate are two capacitor plates of the capacitor, and a dielectric is further included between the two capacitor plates of the capacitor;
[0012] When the headphone plug is inserted into the headphone jack, the headphone plug is located between the first capacitor plate and the second capacitor plate.
[0013] Optionally, the first capacitor plate and the second capacitor plate are located on the wall of the headphone hole of the headphone jack and are arranged opposite to each other.
[0014] Optionally, the angle between the first capacitor plate and the second capacitor plate is within a second preset angle range.
[0015] Optionally, it further includes: a signal processing module, which is connected to the capacitance monitoring module, and the signal processing module is used to determine the insertion / removal state of the headphone plug based on the capacitance of the capacitor.
[0016] Secondly, this disclosure provides an earphone jack, including the earphone detection device described in the first aspect.
[0017] Thirdly, this disclosure provides an electronic device including the headphone jack described in the second aspect.
[0018] The technical solution provided in this disclosure has the following advantages compared with the prior art:
[0019] The headphone detection device of this disclosure includes: a capacitor and a capacitance monitoring module connected to each other; the capacitor includes a first capacitor plate, and when the headphone plug is inserted into the headphone jack, the headphone plug has a projected area on the plane of the first capacitor plate; the capacitance monitoring module is used to monitor the capacitance of the capacitor, wherein the capacitance of the capacitor is used to determine the insertion / removal state of the headphone plug. By adopting the above technical solution, the insertion / removal state of the headphone can be identified based on the capacitance change caused by the insertion / removal process of the headphone plug. This technical solution avoids the situation in related technologies where abnormal deformation of the metal spring or abnormal contact caused by foreign objects during repeated use leads to an inability to effectively identify the insertion / removal state of the headphone, thus improving the effectiveness of the headphone insertion / removal state identification process, reducing the problem of misjudgment in headphone insertion / removal state detection, and enhancing the user experience of electronic devices. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of an earphone detection device provided in an embodiment of the present disclosure;
[0021] Figure 2 This is a schematic diagram of another headphone detection device provided in an embodiment of the present disclosure;
[0022] Figure 3 This is a schematic diagram of the structure of another headphone detection device provided in an embodiment of the present disclosure;
[0023] Figure 4 This is a schematic diagram of another headphone detection device provided in an embodiment of the present disclosure. Detailed Implementation
[0024] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0025] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.
[0026] Figure 1 This is a schematic diagram of the structure of an earphone detection device provided in an embodiment of this disclosure. Figure 1 As shown, the headphone detection device includes: a capacitor 10 and a capacitance monitoring module 20 connected to each other;
[0027] The capacitor 10 includes a first capacitor plate 11, and when the headphone plug 30 is inserted into the headphone jack, the headphone plug 30 has a projected area on the plane where the first capacitor plate 11 is located. The capacitance monitoring module 20 is used to monitor the capacitance of the capacitor 10, wherein the capacitance of the capacitor 10 is used to determine the insertion and removal state of the headphone plug 30.
[0028] Specifically, during the process of inserting the headphone plug 30 into the headphone jack (and during the process of removing the headphone plug 30 from the headphone jack), the capacitance of the capacitor 10 continuously changes. Therefore, the capacitor 10 can detect the proximity of the headphone plug 30 and obtain the changing capacitance according to the degree of proximity (or insertion) of the headphone plug 30. The capacitance describes the capacitance value of the capacitor 10 under different conditions and can vary with the geometric structure and material properties of the capacitor 10.
[0029] Specifically, capacitor 10 is connected to the input terminal of capacitance monitoring module 20, which is capable of monitoring the capacitance of capacitor 10.
[0030] In one embodiment, such as Figure 1As shown, when the headphone plug 30 is inserted into the headphone jack, the headphone plug 30 is another capacitor plate of the capacitor 10, and the two capacitor plates of the capacitor 10 also include a dielectric.
[0031] Optionally, the first capacitor plate 11 is located on the wall of the headphone jack.
[0032] Specifically, the headphone jack can be a round hole, a rectangular hole, etc., but is not limited to these.
[0033] Specifically, the first capacitor plate 11 can be fixed to the headphone jack wall by means of pasting, welding, snap-fit fixing, embedded fixing, screw fixing, etc., but is not limited to these methods.
[0034] It is understandable that placing the first capacitor plate 11 on the wall of the headphone jack would help reduce the difficulty of placing the first capacitor plate 11 in the headphone jack.
[0035] Specifically, the specific material of the dielectric can be set by those skilled in the art according to the actual situation, such as air, and is not limited here.
[0036] Optionally, the angle between the first capacitor plate 11 and the headphone plug 30 is within a first preset angle range.
[0037] Specifically, the "angle between the first capacitor plate 11 and the headphone plug 30" mentioned here refers to the angle between the two planes when they intersect, provided the plane containing the first capacitor plate 11 and the plane containing the headphone plug 30 are extended infinitely. It should be noted that when the two planes are parallel, the angle is 0°.
[0038] Specifically, the endpoint values of the first preset included angle range can be set by those skilled in the art according to the actual situation, and are not limited here. For example, the first preset included angle range is [0°, 10°].
[0039] It is understandable that by setting the angle between the first capacitor plate 11 and the headphone plug 30 within a first preset angle range, the first capacitor plate 11 and the headphone plug 30 can be made parallel or approximately parallel. In this way, the capacitance change of the capacitor 10 is more obvious during the process of inserting or removing the headphone plug 30 from the headphone jack, which is conducive to more accurately identifying the insertion and removal status of the headphone.
[0040] Figure 1 The working principle of the headphone detection device shown is as follows: the first capacitor plate 11 is equivalent to a fixed capacitor plate, and the headphone plug 30 is equivalent to a movable capacitor plate. When the headphone plug 30 moves along... Figure 1When the headphone plug 30 moves in the direction shown, the relative distance between it and the first capacitor plate 11 changes accordingly, and the area Se they cover also changes, causing the capacitance of the capacitor 10 to change. The capacitance value of the capacitor 10 can be expressed by the following formula (1):
[0041] Ce=(ε0εrSe) / d (1)
[0042] Where Ce represents the capacitance of capacitor 10, ε0 represents the vacuum dielectric constant, εr represents the relative dielectric constant of the capacitor plate dielectric material, Se represents the area of mutual coverage between the two capacitor plates, and d represents the distance between the two capacitor plates of capacitor 10. For the first capacitor plate 11, some positional error is permissible; that is, absolute parallelism with the headphone plug 30 is not required. It is sufficient that the insertion or removal of the headphone plug 30 from the headphone jack can be determined based on the change in capacitance.
[0043] As the headphone plug 30 is pulled out (assuming leftward movement means the headphone plug 30 is pulled out of the headphone jack), the area Se of the mutual coverage between the first capacitor plate 11 and the headphone plug 30 decreases, as shown in formula (1), meaning the capacitance of the capacitor 10 decreases; conversely, as the headphone plug 30 is inserted (assuming rightward movement means insertion into the headphone jack), the area Se of the mutual coverage between the first capacitor plate 11 and the headphone plug 30 increases, as shown in formula (1), meaning the capacitance of the capacitor 10 increases. Therefore, the insertion degree of the headphone plug 30 can be detected by the change in the mutual coverage area Se between the first capacitor plate 11 and the headphone plug 30, thereby outputting the changed capacitance according to the insertion degree. In one example, a first capacitance threshold can be preset to... Figure 1 Taking the insertion direction of the headphone jack as an example (from right to left), when the capacitance value of capacitor 10 reaches the first capacitance threshold, it is determined that the headphone plug 30 is inserted into the headphone jack and properly plugged in; when the capacitance value of capacitor 10 is less than the first capacitance threshold, it is determined that the headphone plug 30 is not inserted into the headphone jack or is inserted into the headphone jack but not properly plugged in. In another example, a first capacitance threshold and a second capacitance threshold can be preset. When the capacitance value increases to the first capacitance threshold, it is determined that the headphone plug 30 is inserted into the headphone jack and properly plugged in; when the capacitance value decreases to the second capacitance threshold, it is determined that the headphone plug 30 has been unplugged, thus determining the insertion / unplugging state of the headphone plug 30. In yet another example, a mapping relationship between capacitance value and insertion degree can be preset. By querying this mapping relationship, the insertion / unplugging state of the headphone plug 30 can be determined.
[0044] In another embodiment, Figure 2 This is a schematic diagram of another headphone detection device provided in an embodiment of this disclosure. Figure 2As shown, the capacitor 10 also includes a first capacitor plate 11, the first capacitor plate 11 and the second capacitor plate 12 are the two capacitor plates of the capacitor 10, and a dielectric is also included between the two capacitor plates of the capacitor 10.
[0045] When the headphone plug 30 is inserted into the headphone jack, the headphone plug 30 is located between the first capacitor plate 11 and the second capacitor plate 12.
[0046] Specifically, when the headphone plug 30 is inserted into the headphone jack, the headphone plug 30 serves as at least part of the dielectric of the capacitor 10.
[0047] Optionally, the first capacitor plate 11 and the second capacitor plate 12 are located on the wall of the headphone hole of the headphone jack and are arranged opposite to each other.
[0048] Specifically, the first capacitor plate 11 (second capacitor plate 12) can be fixed to the headphone jack wall by means of pasting, welding, snap-fit fixing, embedded fixing, screw fixing, etc., but is not limited to these methods.
[0049] It is understandable that placing the first capacitor plate 11 and the second capacitor plate 12 on the wall of the headphone jack helps to reduce the difficulty of setting the first capacitor plate 11 and the second capacitor plate 12 in the headphone jack.
[0050] Optionally, the included angle between the first capacitor plate 11 and the second capacitor plate 12 is within a second preset included angle range.
[0051] Specifically, the "angle between the first capacitor plate 11 and the second capacitor plate 12" mentioned here refers to the angle between the two planes when they intersect, provided the plane containing the first capacitor plate 11 and the plane containing the second capacitor plate 12 are extended infinitely. It should be noted that when the two planes are parallel, the angle is 0°.
[0052] Specifically, the endpoint values of the second preset included angle range can be set by those skilled in the art according to actual conditions, and are not limited here. For example, the second preset included angle range is [0°, 10°].
[0053] It is understandable that by setting the angle between the first capacitor plate 11 and the second capacitor plate 12 within a second preset angle range, the first capacitor plate 11 and the second capacitor plate 12 can be made parallel or approximately parallel. In this way, the capacitance change of the capacitor 10 is more obvious during the process of inserting or removing the headphone plug 30 from the headphone jack, which is conducive to more accurately identifying the insertion and removal status of the headphone.
[0054] Figure 2The working principle of the headphone detection device shown is as follows: the first capacitor plate 11 and the second capacitor plate 12 are equivalent to two fixed capacitor plates, and the headphone plug 30 is equivalent to the dielectric between the two capacitor plates. When the headphone plug 30 moves along... Figure 2 When the capacitor moves in the direction of the middle arrow, the dielectric constant of the two capacitor plates changes, thus changing the capacitance of capacitor 10. The capacitance of capacitor 10 can be expressed by the following formula (2):
[0055] Ce=C1+C2=ε0bc[εrc(Lc-Le)+εreLe] / d0 (2)
[0056] In the formula, Ce represents the capacitance value of capacitor 10, which can be equivalent to two capacitors connected in parallel. C1 and C2 are the capacitance values of the two capacitors. ε0 represents the vacuum dielectric constant. εrc represents the relative dielectric constant of the dielectric materials of the two capacitor plates. εre represents the relative dielectric constant of the headphone plug 30. d0 represents the distance between the two capacitor plates. Lc and bc represent the length and width of the capacitor plates, respectively.
[0057] As the headphone plug 30 is inserted or removed, the dielectric constant between the capacitor plates changes, which means the capacitance of the capacitor 10 changes. Therefore, the insertion degree of the headphone plug 30 can be detected by measuring the change in the dielectric constant between the two capacitor plates to obtain the real-time changing capacitance. In one example, a third capacitance threshold and a fourth capacitance threshold can be preset to... Figure 2 Taking the insertion direction of the headphone plug 30 as an example (from right to left), when the capacitance value is increasing, it indicates that the headphone plug 30 is being inserted. When the capacitance value increases to the third capacitance threshold, it is determined that the headphone plug 30 is inserted into the headphone jack and properly plugged in. When the capacitance value is decreasing, it indicates that the headphone plug 30 is being unplugged. When the capacitance value decreases to the fourth capacitance threshold, it is determined that the headphone plug 30 has been unplugged. This is how the insertion / unplugging state of the headphone plug 30 is determined. In another example, a fourth capacitance threshold can be preset. When the capacitance value of capacitor 10 reaches the fourth capacitance threshold, it is determined that the headphone plug 30 is inserted into the headphone jack and properly plugged in. When the capacitance value of capacitor 10 is less than the fourth capacitance threshold, it is determined that the headphone plug 30 is not inserted into the headphone jack or is inserted into the headphone jack but not properly plugged in. In yet another example, a mapping relationship between capacitance value and insertion degree can be preset. By querying this mapping relationship, the insertion / unplugging state of the headphone plug 30 can be determined.
[0058] Optionally, Figure 3 This is a schematic diagram of another headphone detection device provided in an embodiment of the present disclosure. Figure 4 This is a schematic diagram of another headphone detection device provided in an embodiment of this disclosure. Figure 3 and Figure 4 As shown, the device also includes a signal processing module 40, which is connected to the capacitance monitoring module 20. The signal processing module 40 is used to determine the insertion / removal status of the headphone plug 30 based on the capacitance of the capacitor 10.
[0059] It should be noted that the specific implementation structure of the capacitance monitoring module 20 and the signal processing module 40 can be set by those skilled in the art according to the actual situation, and is not limited here.
[0060] In one example, the capacitance monitoring module 20 can convert the capacitance of the capacitor 10 into a digital detection result and output it to the signal processing module 40. The signal processing module 40 can convert the digital detection result into an equivalent capacitance value and determine the insertion / removal state of the headphone plug 30 based on the capacitance value. For a detailed implementation of determining the insertion / removal state of the headphone plug 30 based on the capacitance value, please refer to the preceding text, which will not be repeated here.
[0061] In summary, according to the embodiments of this disclosure, the insertion / removal status of the headphones can be identified based on the change in capacitance caused by the insertion and removal of the headphone plug 30. This technical solution avoids the situation in related technologies where abnormal deformation of the metal spring during repeated use or contact abnormalities caused by foreign objects prevent effective identification of the headphone insertion / removal status. It improves the effectiveness of the headphone insertion / removal status identification process, mitigates the problem of false detection of the headphone insertion / removal status, and enhances the user experience of electronic devices. Simultaneously, it saves space occupied by the metal spring, simplifies the headphone jack design, and improves the user experience.
[0062] This disclosure also provides an earphone jack, including the earphone detection device described in any of the above embodiments.
[0063] The headphone jack provided in this embodiment includes the headphone detection device provided in any of the above embodiments, and therefore has the same beneficial effects as the headphone detection device, which will not be described again here.
[0064] This disclosure also provides an electronic device including the headphone jack described in any of the above embodiments.
[0065] Specifically, the electronic devices described herein can be understood, for example, as mobile phones, tablets, computers, etc., but are not limited thereto.
[0066] The headphone jack provided in this embodiment includes the headphone jack provided in any of the above embodiments, and therefore has the same beneficial effects as the headphone jack, which will not be described again here.
[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. An earphone detection device, characterized in that, include: Interconnected capacitors and capacitance monitoring module; The capacitor includes a first capacitor plate, and when the headphone plug is inserted into the headphone jack, the headphone plug has a projected area on the plane where the first capacitor plate is located. The capacitance monitoring module is used to monitor the capacitance of the capacitor, wherein the capacitance of the capacitor is used to determine the insertion / removal status of the headphone plug.
2. The earphone detection device according to claim 1, characterized in that, When the headphone plug is inserted into the headphone jack, the headphone plug serves as another capacitor plate of the capacitor, and a dielectric is also included between the two capacitor plates of the capacitor.
3. The earphone detection device according to claim 2, characterized in that, The first capacitor plate is located on the wall of the headphone hole of the headphone jack.
4. The earphone detection device according to claim 2, characterized in that, The angle between the first capacitor plate and the headphone plug is within a first preset angle range.
5. The earphone detection device according to claim 1, characterized in that, The capacitor further includes a second capacitor plate, and the first capacitor plate and the second capacitor plate are the two capacitor plates of the capacitor. A dielectric is also included between the two capacitor plates of the capacitor. When the headphone plug is inserted into the headphone jack, the headphone plug is located between the first capacitor plate and the second capacitor plate.
6. The earphone detection device according to claim 5, characterized in that, The first capacitor plate and the second capacitor plate are located on the wall of the headphone hole of the headphone jack and are arranged opposite each other.
7. The earphone detection device according to claim 5, characterized in that, The angle between the first capacitor plate and the second capacitor plate is within a second preset angle range.
8. The earphone detection device according to claim 7, characterized in that, Also includes: A signal processing module is connected to the capacitance monitoring module, and the signal processing module is used to determine the insertion / removal state of the headphone plug based on the capacitance of the capacitor.
9. An earphone jack, characterized in that, include: The headphone detection device according to any one of claims 1-8.
10. An electronic device, characterized in that, include: The headphone jack as described in claim 9.