Miniature anti-lost device structure
By improving the buzzer structure and overall design, the problem of large volume of anti-loss device in pursuit of loudness is solved, and a smaller product size and a wider application range is achieved.
Patent Information
- Application Number
- CN202411608493.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-02-18
AI Technical Summary
When the existing anti-loss device pursues a loudness standard of more than 60db, the buzzer has a large volume, resulting in high product manufacturing costs and is difficult to achieve small size and miniaturization, limiting the application range.
By improving the buzzer structure, a smaller buzzer and an optimized pronunciation cavity design, combined with a flexible circuit board and a simplified charging structure, the product volume and cost is reduced.
On the premise of meeting loudness requirements, the size of the buzzer was reduced by 33%, the area and volume of the overall product were reduced, making it suitable for miniaturized and miniaturized products, and the scope of application was expanded.
Smart Images
Figure CN119479221A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of anti-lost device structures, and in particular to a miniature anti-lost device structure. Background Art
[0002] As the name suggests, the anti-lost device is used to prevent items from being lost. When the item is lost, the anti-lost device can be controlled by the mobile phone to make a sound and locate the item, so that the item can be found easily. The anti-lost device can be used to prevent the loss of valuable items such as mobile phones, wallets, keys, luggage, etc. It can also be used to prevent children and pets from getting lost and to locate vehicles.
[0003] The buzzer is a key component of the anti-lost device. By installing it on the product, when the product needs to be found, it cooperates with the upper computer such as the mobile phone to start the buzzer to sound, which can help users quickly locate the position of the product. In the prior art, the buzzer is mainly generated by the vibration of the buzzer plate, and the volume of the buzzer plate is mainly determined by the vibration area, vibration frequency and sound cavity design. Therefore, the volume miniaturization of the anti-lost device is restricted by the volume of the buzzer. Generally speaking, the buzzer plate with a larger vibration area tends to produce a louder sound. Therefore, the prior art usually increases the loudness of the buzzer by increasing the area of the buzzer plate. To make the sound of the anti-lost device reach the standard requirement of more than 60db, at least a 9mm buzzer is required to achieve this. This way of sacrificing area will inevitably increase the manufacturing cost of the product, which is not conducive to the miniaturization and miniaturization of the anti-lost device product, thereby limiting the application scope of the anti-lost device product. Summary of the invention
[0004] In order to solve the problems in the prior art, the present invention provides a miniature anti-lost device structure.
[0005] The micro anti-lost device structure of the present invention comprises a circuit board, a main control circuit arranged on the circuit board, a key switch connected to the main control circuit respectively, a buzzer and a battery. The micro anti-lost device structure also comprises a waterproof structure wrapping the circuit board. The top surface of the buzzer is provided with a sound outlet. A buzzer sheet is provided inside the buzzer. The buzzer sheet and the top and side walls of the buzzer form a resonance cavity. When the buzzer sheet inside the buzzer vibrates, the top surface of the buzzer can resonate with the buzzer sheet and emit sound through the sound outlet. A resonance window matching the top surface is provided at a position corresponding to the waterproof structure and the top surface of the buzzer. The main control circuit is provided with a main control module, and also comprises a buzzer module connected to the main control module and driving the buzzer to generate sound. A communication antenna for communicating with a search device is also provided.
[0006] Furthermore, the circuit board is also provided with charging contacts or conductive columns electrically connected to the battery and used to charge the battery, and the waterproof structure is provided with charging holes at positions corresponding to the charging contacts or conductive columns.
[0007] Furthermore, the circuit board is a flexible circuit board, the waterproof structure is a sealing layer covering the upper surface of the flexible circuit board, two conductive posts respectively connected to the positive and negative poles of the battery are welded on the circuit board, and the conductive posts are arranged not lower than the upper surface of the sealing layer.
[0008] Furthermore, the buzzer and the battery are arranged in parallel on one side of the flexible circuit board, the main control circuit, the conductive column and the key switch are arranged on the other side of the flexible circuit board, and the key switch and the conductive column are arranged opposite to the battery.
[0009] Furthermore, the buzzer and the battery are respectively arranged on two sides of the flexible circuit board, and the key switch and the conductive column are arranged on the other side of the flexible circuit board corresponding to the battery.
[0010] Furthermore, the flexible circuit board is folded in the middle along the width direction.
[0011] Furthermore, the buzzer includes a buzzer body having an opening at the bottom, and the buzzer also includes a cavity cover covering the lower opening of the buzzer body, and the buzzer plate is arranged in the buzzer body, wherein a resonance cavity is formed between the top surface of the buzzer body and the buzzer plate, and when the buzzer plate vibrates, the top surface can resonate with the buzzer plate.
[0012] Furthermore, the top surface of the buzzer body is thinned relative to the side wall, the thickness of the side wall of the buzzer body is 0.9-1.3 mm, and the thickness of the top surface is 0.5-0.8 mm.
[0013] Furthermore, the buzzer structure is circular, the diameter of the buzzer structure is 6-7 mm, and the diameter of the sound outlet hole is 0.8-1.5 mm.
[0014] Furthermore, the length of the micro anti-lost device structure is 30-40 mm, the width of the circuit board is 6-8 mm, and the thickness is 2-3 mm.
[0015] Compared with the prior art, the beneficial effect of the present invention is that by improving the buzzer structure of the anti-lost device, the present invention can reduce the size of the buzzer by 33% under the required loudness standard, thereby effectively reducing the area of the anti-lost device structure.
[0016] By providing charging contacts or charging posts, the product structure can be simplified, and there is no need to provide an additional battery compartment and opening and closing structure, which effectively reduces product cost and product size. By optimizing the charging structure, the thickness and volume increase caused by the existing charging interface can be effectively reduced, further reducing the product size.
[0017] By setting the circuit board as a flexible circuit board, it can be folded according to needs, so that the overall size is smaller, which is conducive to assembly on smaller products, thereby expanding the application of the present invention.
[0018] In summary, under the premise of limited size and space, the present invention creatively improves the structure of the entire anti-loss device, so that the area and volume of the product are effectively reduced while the loudness of the anti-loss device meets the requirements, so that it can be applied to miniaturized and micronized products, greatly expanding the application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the present invention or the solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;
[0021] Figure 2 and Figure 3 This is a schematic diagram of the circuit board structure of the first embodiment of the present invention;
[0022] Figure 4 This is a schematic diagram of the exploded structure of the circuit board of the present invention;
[0023] Figure 5 It is a schematic diagram of the structure of the buzzer of the present invention;
[0024] Figure 6 This is a schematic diagram of the exploded structure of the buzzer of the present invention;
[0025] Figure 7 This is a schematic diagram of the exploded structure of the buzzer of the present invention from another perspective;
[0026] Figure 8 This is a structural block diagram of an embodiment of a circuit board of the present invention;
[0027] Fig. 9 This is a circuit schematic diagram of the main control module of the circuit board of the present invention;
[0028] Fig.10 This is a circuit schematic diagram of a sensor module embodiment 1;
[0029] Fig.11 This is a circuit schematic diagram of the second embodiment of the sensor module;
[0030] Fig.12 This is the circuit schematic diagram of the battery detection unit;
[0031] Fig.13This is the circuit schematic diagram of the buzzer module;
[0032] Fig.14 and Fig.15 This is a schematic diagram of the application scenario structure of the first embodiment of the present invention;
[0033] Fig.16 It is a structural schematic diagram of a second embodiment of the present invention;
[0034] Fig.17 This is a schematic diagram of the circuit board structure of the third embodiment of the present invention;
[0035] Fig.18 This is a schematic diagram of the application scenario structure of the third embodiment of the present invention. DETAILED DESCRIPTION
[0036] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.
[0037] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.
[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0039] like Figure 1-Figure 18As shown, the micro anti-lost device structure 1 of the present invention includes a circuit board 10, a main control circuit 200 arranged on the circuit board 10, a key switch 300 respectively connected to the main control circuit 200, a buzzer 100 and a battery 500. The micro anti-lost device structure 1 also includes a waterproof structure 11 wrapping the circuit board. The top surface of the buzzer 100 is provided with a sound outlet 105. When the buzzer sheet 102 inside the buzzer 100 vibrates, the top surface of the buzzer 100 can resonate with the buzzer sheet 102 and emit sound through the sound outlet 105. The waterproof structure 11 is provided with a resonance window matching the top surface 1012 at a position corresponding to the top surface of the buzzer.
[0040] By improving the buzzer structure of the anti-loss device, the present invention can reduce the size of the buzzer by 33% under the required loudness standard, thereby effectively reducing the structure of the anti-loss device. Since the area of the buzzer is smaller, the power to drive the buzzer to sound is smaller, thereby effectively reducing power consumption.
[0041] Preferably, the circuit board 10 is also provided with charging contacts or conductive columns 400 electrically connected to the battery 500 and used to charge the battery 500, and the waterproof structure 11 is provided with charging holes corresponding to the charging contacts or conductive columns 400, which can seal the circuit board while maintaining the conductive properties of the charging contacts or conductive columns 400.
[0042] By setting up charging contacts or charging columns, on the one hand, the product structure can be simplified, and there is no need to additionally set up a battery compartment and opening and closing structure, which can effectively reduce product costs and product size. By optimizing the charging structure, the thickness and volume increase caused by the existing charging interface can be effectively reduced, further reducing the product size.
[0043] The length of the micro anti-lost device structure 1 of the present invention can be 30-40 mm, the width is 6-8 mm, and the thickness is 2-3 mm. The present invention can be directly pasted on various products with the risk of loss. It is smaller than double-sided tape and can also be clamped or pasted on books to facilitate book search.
[0044] Preferably, in this example, the circuit and functional structure are arranged away from the width center line. When the installation length of the anti-loss device is required to be smaller, the present invention can fold the circuit board from the middle, and then reasonably arrange the buzzer 100, the key switch 300, and the conductive column 400 on the outer side, and then seal it with glue, so that the width of the present invention remains unchanged, the length can be about 20mm, the thickness is only 5mm, and the overall size is only the size of a cotton swab head. It can be easily embedded in various tiny products, filling the market gap in the anti-loss of tiny products.
[0045] like Figure 1-Figure 7As shown, as a preferred embodiment of the present invention, the circuit board 10 of this example is a flexible circuit board, the waterproof structure 11 is a sealing layer covering the upper surface of the flexible circuit board, and two conductive posts 400 respectively connected to the positive and negative electrodes of the battery are welded on the circuit board, and the conductive posts 400 are arranged not lower than the upper surface of the sealing layer. The conductive posts 400 are arranged not lower than the sealing layer in consideration that the product of the present invention can be embedded in the product to be found, and when embedded in the product, the conductive posts 400 can still maintain a certain height to facilitate charging the battery. When the present invention is used directly without being embedded in other products, the conductive posts 400 can be set as conductive contacts in this example to further reduce process and production costs.
[0046] In the anti-lost device structure of the present invention, since the buzzer 100 and the battery 500 are thicker than other devices, in this example, the buzzer 100 and the battery 500 are arranged side by side on one side of the flexible circuit board, and the main control circuit 200, the conductive column 400 and the key switch 300 are arranged on the other side of the flexible circuit board, and the key switch 300 and the conductive column 400 are arranged opposite to the battery 500. Since the battery 500 is hard, by arranging the key switch 300 on the back of the battery 500, with the battery 500 as the bottom, it is convenient for pressing or touching operation.
[0047] like Figure 4 As shown, the key switch 300 of this example includes a tact switch 303 connected to the main control circuit, a circle of foam 302 is arranged on the periphery of the tact switch 303, and a touch sheet 301 in contact with the tact switch 303 is arranged on the upper surface of the foam 302. The touch sheet 301 can effectively isolate the tact switch 303 to prevent the sealing glue from damaging the tact switch 303. On the other hand, by arranging the foam 302, the pressing feel of the key after sealing can be guaranteed.
[0048] like Figure 5-Figure 7 As shown, as an embodiment of the present invention, the overall structure of the buzzer 100 of this example is circular, including a buzzer body 101, a buzzer piece 102 and a cavity cover 103, wherein the buzzer body 101 and the cavity cover 103 enclose a sounding cavity, and a sound outlet hole 105 is provided in the middle of a top surface 1012 of the buzzer body 101 away from the cavity cover 103, and the buzzer piece 102 is arranged in the sounding cavity. When the buzzer piece 102 vibrates, the top surface 1012 is thinned relative to the side wall 1011 of the buzzer body 101, and the top surface 1012 can resonate with the buzzer piece 102 and make sound through the sound outlet hole 105.
[0049] The present invention changes the design concept. Under the premise of limited size and space, the top surface thickness of the buzzer body is creatively improved so that when the buzzer vibrates, it can resonate with the vibration frequency of the buzzer, so that the buzzer sheet of the same size can produce a louder sound, which is conducive to reducing production costs. The shape of this example is not limited to a circle, and can also be applied to other shapes of buzzer structures on the market, such as an ellipse.
[0050] It is worth mentioning that the diameter of the buzzer of the present invention can be 6-7mm, which can meet the sound output loudness of 10mm or even larger sizes in the existing technology. Through the technical breakthrough of the present invention, the sound produced by the 6-7mm buzzer is louder and can reach 60db, meeting the needs of daily reminders and other uses, so that it can be applied to miniaturized and micronized products, greatly expanding the use of the present invention.
[0051] The buzzer structure of the present invention can be matched with a chip in application to be prepared into an integrated reminder, and the overall size can be less than 2 cm, so that it can be pasted or embedded in any product with a size of more than 2 cm, thereby further expanding the application of the present invention, facilitating the anti-loss and search of small objects, and having strong practicality.
[0052] like Figure 5-Figure 7 As shown, in this example, a circle of stepped surface 1013 is provided on the inner wall of the buzzer body 101 , and the outer periphery of the buzzer plate 102 is fixed on the stepped surface 1013 by means of sealant.
[0053] Correspondingly, a circle of convex ribs 1031 is provided on the upper surface of the cavity cover 103 , which can be buckled and pressed onto the step surface 1013 to strengthen the connection of the buzzer plate 102 .
[0054] The buzzer piece 102 of the present invention includes a first electrode 1021 disposed in the middle and a second electrode 1022 disposed around the first electrode 1021 . The first electrode 1021 and the second electrode 1022 are respectively provided with conductive structures.
[0055] The conductive structure of this example is a conductive wire 104. A notch 1014 is provided below the step surface of the side wall of the buzzer body 101 for leading out the conductive wire 104 and connecting it to the power supply structure. A limiting protrusion 1032 is provided at a position corresponding to the notch 1014 on the cavity cover 103 for limiting the installation of the cavity cover 103 and facilitating the assembly guide of the cavity cover 103 on the buzzer body 101. The conductive structure of this example can also adopt a conductive ejector pin or other structure.
[0056] The buzzer body 101 and the cavity cover 103 of the present invention are made of plastic material, such as ABS, PC, PA, etc., which can be injection molded. The wall thickness of the side wall 1011 of the buzzer body 101 is designed to be 0.9-1.3 mm to ensure strength and avoid injection molding deformation, and the thickness of the top surface 1012 is 0.5-0.8 mm. The thinning design can resonate with the vibration frequency of the buzzer.
[0057] The diameter of the buzzer structure in this example is 6-7mm, and the sound outlet hole is designed to be 0.8-1.5mm in diameter, so that the buzzer plate vibrates in the sound cavity to generate air pressure, forming cavitation. The air is squeezed and quickly released through the small hole to produce sound. The above points can enhance the sound amplification effect, making the sound produced by the 6-7mm buzzer plate louder, reaching 60db. Of course, if the loudness requirement of the sound source is low, the size of the buzzer plate can be further reduced to make the volume of the anti-lost device structure 1 of the present invention smaller.
[0058] The buzzer structure of the present invention generates a greater pressure on the air in the sound cavity. With the sound hole design, the air is squeezed and quickly released through the small hole to generate sound, which enables the buzzer structure of the present invention to form a similar cavitation phenomenon, thereby significantly enhancing the sound amplification effect. In addition, through the optimization of the present invention, the sound cavity can resonate with the micro buzzer sheet, and the sound is concentrated together and emitted. When the micro buzzer sheet 102 is subjected to piezoelectric vibration and the resonance cavity has an appropriate resonant frequency, the sound pressure at a specific frequency can be increased and a specific bandwidth can be obtained by controlling the positions of the two. The sound will be concentrated and amplified, so that the loudness of the buzzer structure of the present invention can meet the reminder requirements of small or even miniaturized products.
[0059] like Figure 8 As shown, as an embodiment of the present invention, this example is applied to the Find My technology, which is an application technology released by Apple. Peripheral products that support this technology can use the surrounding Apple devices (iPhone, iPad, AirPods, AirTag, etc.) to help them locate even if they do not have a GPS module.
[0060] On this basis, the anti-lost device circuit provided by the present invention can be applied to the anti-lost device product of Find My, and the anti-lost device can be positioned in combination with Apple devices. The present invention has a simple structure and can effectively reduce the size and cost of the product, which is conducive to the popularization of the application of anti-lost device products. Of course, the present invention can also realize the positioning function by adding a positioning chip without using the Find My network, but combining it with the host computer APP alone.
[0061] like Figure 8As shown, the main control circuit of the present invention is composed of a main control module, a push button switch, a buzzer module, a sensor module and a power module, wherein the output end of the push button switch and the output end of the sensor module are respectively connected to the input end of the main control module, the input end of the buzzer module is connected to the output end of the main control module, the power module supplies power to the entire circuit, and the main control module integrates a communication module, which is provided with a communication antenna for communicating with a search device and broadcasting information to the search device.
[0062] like Fig. 9 and Fig.12 As shown, the main control module of this example includes a main control chip U1, a crystal oscillator X1 and a filtering unit. The main control chip adopts the CY8018 chip, and the communication antenna is a Bluetooth antenna. The antenna is connected to the pads TP9 and TP10 led out from pin 6 of the main control chip U1, and the pins 2 and 3 of the main control chip U1 are connected to the crystal oscillator X1. The filtering unit is arranged on the power supply pin of the main control chip and the communication pin connected to the communication antenna.
[0063] In this example, pin 18 of the main control chip U1 is connected to the battery, pins 19 and 20 output DCDC power, pins 8-9 are connected to the sensor module, pin 23 is connected to the battery detection unit, pins 10-12 are connected to the debug port, pin 16 is connected to the switch button J1, and pins 15, 21-22 are connected to the buzzer module.
[0064] Furthermore, the filter unit of the power supply pin of the main control chip U1 adopts a filter capacitor. In addition, in this example, a high-precision low-voltage difference linear voltage regulator P1 is also set at the output end of pin 18 connected to the battery, so as to provide a stable power supply for the entire circuit. The filter unit on the communication pin of the main control chip U1 adopts a π-type filter, including an inductor L2, a capacitor C7, and a capacitor C8. The inductor is connected in series to pin 6 of the main control chip U1. One end of the capacitor C7 and the capacitor C8 are grounded, and the other end is respectively set at the two ends of the inductor L2. Preferably, in this example, a matching resistor R9 and a matching inductor ANT1 are also set at the input end of the filter unit to make the signal quality received by the present invention better.
[0065] Preferably, the main control chip in this example may also adopt a UWB positioning chip, which can directly send positioning information to the APP of the host computer.
[0066] like Fig.12 As shown, the battery detection unit of this example includes a first resistor R1, a second resistor R2 and a first capacitor C9. The first resistor R1 and the second resistor R2 are connected in series, one end of which is connected to the power supply end of the battery and the other end is grounded. One end of the first capacitor C9 is grounded, and the other end of the first capacitor C9 is connected to the detection pin of the main control chip U1 between the first resistor R1 and the second resistor R2.
[0067] like Fig.10 As shown, as an embodiment of the present invention, the sensor module of this example includes a displacement sensor U2, a resistor R5, a resistor R4 and a capacitor C14, and the pin A2 and the pin B2 of the displacement sensor U2 are respectively connected to the pin 8 and the pin 9 of the main control chip U1. The main control chip of this example can communicate with the search device APP, sleep in a normal state, and is in a slow broadcast state. It wakes up and broadcasts data information once every first time period. If the displacement sensor U2 detects movement, it sends displacement information to the main control chip U1, and the main control chip U1 is activated, adjusts the speed of external broadcasting, enters a fast broadcast state, and broadcasts data information once every second time period. The first time period can be one hour, the second time period can be 3 minutes, etc., and can also be set to other values according to needs. The time counting is realized by the crystal oscillator X1. If you need to find a product, you can also wake up the main control chip U1 by communicating with the host computer.
[0068] like Fig.11 As shown, as another embodiment of the present invention, in this example, other chips such as MSA3S01 can also be purchased to meet different positioning requirements.
[0069] like Fig.13 As shown, the buzzer module of this example includes a buzzer driver DC009 and a buzzer driven by the buzzer driver DC009. Pin 1 and pin 2 of the buzzer driver DC009 are respectively connected to pin 21 and pin 22 of the main control chip U1. The high and low levels of the two pins are used to control the amplification of the buzzer sound. Pin 3 of the buzzer driver DC009 is connected to pin 15 of the main control chip U1 for setting the buzzer drive mode. Pin 6 and pin 7 of the buzzer driver DC009 are respectively connected to the buzzer.
[0070] This example works like this:
[0071] Before use, debug this circuit through the pad connected to the external debugging device. After debugging, the main control chip U1 will broadcast information to the search device according to the settings. The search device calculates the position information and trajectory according to the displacement information reported by the main control chip, so that it can easily find the items installed with this circuit. When the pairing timeout occurs, it automatically enters the sleep state. The main control chip can be re-awakened through communication with the host computer, and then enters the pairing state and realizes anti-lost search, thereby effectively reducing power consumption.
[0072] The battery detection unit detects the battery voltage in real time. The power supply voltage in this example is 3.7V. When the battery voltage is less than 2.7V, the circuit does not work and reminds the user through a buzzer to prevent the battery from being over-discharged and protect the battery. The circuit in this example is simple and consists of only three very small chips and multiple resistors and capacitors. The power consumption is very low and can support 4-5 years of use, which is convenient for users and effectively reduces product costs and usage costs.
[0073] like Fig.14 and Fig.15 As shown, as an application scenario of the present invention, the anti-lost device structure 1 of this example is installed in the anti-slip cover 2 of the temple of the glasses, and the anti-slip cover 2 is provided with a mounting hole 20 for installing it at a suitable position of the temple, and is also provided with a mounting cavity 21 for installing the anti-lost device structure 1 of the present invention and a charging hole 22 and a sound hole 23 connected to the mounting cavity. The charging hole 22 matches the conductive column 400, and the conductive column 400 can be embedded in the charging hole 22. The sound hole 23 is set corresponding to the sound outlet hole 105 of the buzzer 100. When in use, it is only necessary to insert the flexible anti-lost device structure 1 of the present invention into the mounting cavity, and the installation is very convenient. When it is necessary to find the glasses, it is only necessary to successfully pair the anti-lost device structure 1 with the mobile phone, remotely control the buzzer to sound, and easily find the glasses by following the sound source.
[0074] like Fig.16 As shown, as another embodiment of the present invention, in this example, the key switch, buzzer 100 and conductive column 400 are arranged on the upper surface. The advantage of this is that the back of the structure of the present invention can be glued to any product that needs to be prevented from being lost by means of glue or the like.
[0075] like Fig.17 As shown, the present invention can also set the buzzer 100 in the middle of the anti-lost device structure 1, so as to avoid friction or collision with other products when it is set at the end.
[0076] like Fig.18 As shown, as a use scenario of the present invention, this example can be equipped with a shell, designed as a pendant 3 installed on a key or other product, and a through hole 33 is provided at the end of the pendant 3, through which it is conveniently installed on a key ring or other products that are not convenient to directly stick. A charging hole 32 that cooperates with the conductive column 400 is provided at the other end of the pendant 3 opposite to the through hole 33, and a sound hole 31 corresponding to the sound outlet hole 105 is also provided in the middle of the pendant 3.
[0077] To sum up, under the premise of limited size and space, the present invention creatively improves the structure of the entire anti-loss device, so that the area and volume of the product are effectively reduced while the loudness of the anti-loss device meets the requirements, so that it can be applied to miniaturized and micro-miniaturized products, greatly expanding the application of the present invention.
[0078] The specific implementation modes described above are preferred implementation modes of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation modes, and all equivalent changes made according to the present invention are within the protection scope of the present invention.
Claims
1. A micro anti-lost device structure, characterized in that: The device comprises a circuit board, a main control circuit arranged on the circuit board, a key switch respectively connected to the main control circuit, a buzzer and a battery. The micro anti-lost device structure also comprises a waterproof structure wrapping the circuit board. The top surface of the buzzer is provided with a sound outlet. A buzzer sheet is arranged inside the buzzer. The buzzer sheet and the top and side wall of the buzzer form a resonance cavity. When the buzzer sheet inside the buzzer vibrates, the top surface of the buzzer can resonate with the buzzer sheet and emit sound through the sound outlet. A resonance window matching the top surface is arranged at a position corresponding to the waterproof structure and the top surface of the buzzer. The main control circuit is provided with a main control module, and also includes a buzzer module connected to the main control module and driving the buzzer to generate a buzzer, and is also provided with a communication antenna for communicating with a search device.
2. The micro anti-lost device structure according to claim 1 is characterized in that: The circuit board is also provided with charging contacts or conductive columns electrically connected to the battery and used to charge the battery, and the waterproof structure is provided with charging holes at positions corresponding to the charging contacts or conductive columns.
3. The micro anti-lost device structure according to claim 1 or 2, characterized in that: The circuit board is a flexible circuit board, the waterproof structure is a sealing layer covering the upper surface of the flexible circuit board, two conductive posts respectively connected to the positive and negative electrodes of the battery are welded on the circuit board, and the conductive posts are arranged not lower than the upper surface of the sealing layer.
4. The micro anti-lost device structure according to claim 3 is characterized in that: The buzzer and the battery are arranged in parallel on one side of the flexible circuit board, the main control circuit, the conductive column and the key switch are arranged on the other side of the flexible circuit board, and the key switch and the conductive column are arranged opposite to the battery.
5. The micro anti-lost device structure according to claim 3 is characterized in that: The buzzer and the battery are respectively arranged on two sides of the flexible circuit board, and the key switch and the conductive column are arranged on the other side of the flexible circuit board corresponding to the battery.
6. The micro anti-lost device structure according to claim 5 is characterized in that: The flexible circuit board is folded in the middle along the width direction.
7. The micro anti-lost device structure according to claim 1 is characterized in that: The buzzer includes a buzzer body, which has an opening at the bottom. The buzzer also includes a cavity cover covering the lower opening of the buzzer body. The buzzer plate is arranged in the buzzer body, wherein a resonance cavity is formed between the top surface of the buzzer body and the buzzer plate, and when the buzzer plate vibrates, the top surface can resonate with the buzzer plate.
8. The micro anti-lost device structure according to claim 7, characterized in that: The top surface of the buzzer body is thinned relative to the side wall, the thickness of the side wall of the buzzer body is 0.9-1.3 mm, and the thickness of the top surface is 0.5-0.8 mm.
9. The micro anti-lost device structure according to claim 8, characterized in that: The buzzer structure is circular, the diameter of the buzzer structure is 6-7 mm, and the diameter of the sound outlet hole is 0.8-1.5 mm.
10. The micro anti-lost device structure according to claim 9, characterized in that: The length of the micro anti-lost device structure is 30-40 mm, the width of the circuit board is 6-8 mm, and the thickness is 2-3 mm.