Pneumatic regulating device, watchband tightness regulating device and wearable device

Abstract

The application relates to the technical field of electronic equipment, and specifically provides a pneumatic adjusting device, a watchband tightness adjusting device and a wearable device. The pneumatic adjusting device comprises a pneumatic assembly and a gas conveying piece. The pneumatic assembly has a gas cavity. The gas conveying piece is installed in a watchcase of the wearable device, is in communication with the gas cavity, and is used for changing the air pressure in the gas cavity. The pneumatic assembly is used for increasing or reducing the gap between the watchband and the wrist of a user under the condition that the air pressure in the gas cavity is changed. The gas conveying piece changes the air pressure in the gas cavity of the pneumatic assembly, so that the increase or reduction of the gap between the watchband and the wrist can be realized. The whole adjusting process can not need to disassemble a watch buckle, the user can quickly complete tightness adjustment in a wearing state, the operation complexity is obviously reduced, the adjusting time is saved, and the use convenience of the user is greatly improved.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a pneumatic adjustment device, a watch strap tension adjustment device, and a wearable device. Background Technology

[0002] With smartwatches as the mainstream wearable device, they can record real-time data such as users' exercise, sleep, and diet, and synchronize it to terminals such as mobile phones and tablets to provide guidance for a healthy life.

[0003] When wearing it daily, users can adjust the gap between the smartwatch strap and their wrist according to their preferences. Generally, in sports scenarios, it is necessary to wear it more tightly so that the strap fits the wrist and reduces the feeling of shaking or foreign objects when making large movements. In other scenarios, a gap is needed between the strap and the wrist.

[0004] Currently, the way to adjust the tightness of a smartwatch strap to fit the wrist is usually by manually opening the clasp to adjust the position of different holes on the strap and then fastening it again. This process is cumbersome and inefficient. Because the distance between the holes on the strap is fixed, the traditional adjustment method can result in the strap being too tight or too loose, making it difficult to adapt to different wearing needs. Utility Model Content

[0005] This application provides a pneumatic adjustment device, a watch strap tension adjustment device, and a wearable device, which can conveniently adjust the tightness of the strap to adapt to the wearing needs of different scenarios.

[0006] In a first aspect, a pneumatic adjustment device is provided for use in a wearable device with a strap, the pneumatic adjustment device comprising:

[0007] A pneumatic assembly having a gas cavity;

[0008] A gas delivery device is installed inside the casing of the wearable device, the gas delivery device is connected to the gas cavity, and the gas delivery device is used to change the gas pressure inside the gas cavity;

[0009] When the air pressure in the gas chamber changes, the pneumatic component is used to increase or decrease the gap between the watch strap and the user's wrist.

[0010] The pneumatic adjustment device provided in this application allows the gas delivery component to change the air pressure within the gas chamber of the pneumatic assembly, thereby increasing or decreasing the gap between the watch strap and the wrist. The entire adjustment process can be completed without disassembling the clasp, allowing the user to quickly adjust the tightness while wearing the watch. This significantly reduces operational complexity, saves adjustment time, and greatly improves user convenience. The gas delivery component can precisely control the air pressure within the gas chamber (e.g., by slightly increasing or decreasing the air volume), thereby driving the pneumatic assembly to achieve subtle changes in the gap between the watch strap and the wrist. The tightness adjustment range of the watch strap is small, enabling fine-tuning. This allows users to precisely adjust the watch strap to their ideal tightness according to their needs, meeting personalized wearing requirements in different scenarios.

[0011] In one possible implementation, the pneumatic component is connected to the end of the watch strap;

[0012] When the gas delivery component fills the gas cavity with gas, the pneumatic component is used to drive the watch strap to move toward the inside of the watch case, or to drive the watch strap to move toward the outside of the watch case;

[0013] or,

[0014] When the gas delivery component fills the gas cavity with gas, the pneumatic component drives the watch strap to move toward the inside of the watch case; when the pneumatic component exhausts gas, the pneumatic component drives the watch strap to move toward the outside of the watch case.

[0015] The pneumatic component, by inflating a gas cavity, moves the end of the watch strap either inward (tightening) or outward (loosening) from the watch case. This pneumatic component directly adjusts the strap length, allowing for stepless adjustment based on the inflation volume, meeting the precise tightness requirements of different scenarios. In one possible implementation, the pneumatic component includes a cylinder installed within the watch case. The cylinder comprises a cylinder body and a piston rod. One of the cylinder body and the piston rod is connected to the watch case, and the other is connected to the watch strap. The cylinder body and the piston rod can move relative to each other to move the end of the watch strap relative to the watch case.

[0016] The cylinder body is provided with the gas chamber, which is divided into a first chamber and a second chamber by the piston part of the piston rod;

[0017] The gas delivery device is connected to the first chamber and the second chamber; the gas delivery device is used to fill gas into or discharge gas from either the first chamber or the second chamber, so that a pressure difference is formed on both sides of the piston portion;

[0018] When the pressure on the piston portion facing the first chamber is greater than the pressure on the piston portion facing the second chamber, the piston rod drives the watch strap to move inward relative to the watch case;

[0019] When the pressure on the piston portion facing the first chamber is less than the pressure on the piston portion facing the second chamber, the piston rod drives the watch strap to move outward relative to the watch case.

[0020] As a mature pneumatic actuator, the cylinder exhibits a stable linear relationship between its extension / retraction stroke and the gas input. When the gas delivery component charges or vents the cylinder, it drives the end of the watchband to move quantitatively and directionally, thus significantly improving the precision of the watchband's tightness adjustment. By installing the cylinder inside the watch case of the wearable device, it can be concealed, thereby enhancing the device's appearance.

[0021] Because the first and second chambers are independent and isolated by the piston section, gas flow between the two chambers is effectively reduced or avoided, ensuring a stable driving force of the air pressure on the piston rod. When the first chamber is filled with air, a pressure difference is created on both sides of the piston section, which stably pushes the piston rod to move, thus moving the end of the watch strap into the watch case. Similarly, when the first chamber is vented or the second chamber is filled (or vented while filling the second chamber), a stable reverse pressure difference is also created, moving the end of the watch strap out of the watch case. This stable driving force transmission reduces phenomena such as jamming and shaking during the adjustment process, improving the reliability of the pneumatic adjustment device.

[0022] In one possible implementation, the pneumatic regulating device further includes a reversing valve, a first air pipe, a second air pipe, and a third air pipe;

[0023] The first connection port of the reversing valve is connected to the first chamber through the first air pipe;

[0024] The second connection port of the reversing valve is connected to the second chamber through the second air pipe;

[0025] The third connection port of the reversing valve is connected to the gas delivery component through the third air pipe;

[0026] The reversing valve is used to switch the gas flow path so that the gas enters the first chamber through the first air pipe or enters the second chamber through the second air pipe.

[0027] The first air tube connects to the first chamber, and the second air tube connects to the second chamber. With the help of a reversing valve, the selective flow of the gas delivery component and the two air tubes allows for independent inflation control of the first and second chambers. For example, when the watch band needs to be tightened, the reversing valve connects the gas delivery component to the first air tube, inflating only the first chamber; when the watch band needs to be loosened, the gas delivery component connects to the second air tube, inflating only the second chamber (or in conjunction with venting the first chamber). This eliminates the need for a separate gas delivery component for each chamber; the first and second chambers can share the same gas delivery component, thus reducing the space occupied by the pneumatic adjustment device within the watch case.

[0028] In some embodiments, the pneumatic regulating device includes a first exhaust valve and a third exhaust valve. The first exhaust valve can be located in a first air pipe or in a cylinder, and is connected to a first chamber. The third exhaust valve can be located in a second air pipe or in a cylinder, and is connected to a second chamber. When the first exhaust valve is open, exhaust is released from the first chamber; when the third exhaust valve is open, exhaust is released from the second chamber. In actual use, when inflating the first chamber, the first exhaust valve can be closed and the third exhaust valve opened; when inflating the second chamber, the first exhaust valve can be opened and the third exhaust valve closed.

[0029] In one possible implementation, the cylinder further includes an elastic element disposed in the first chamber and / or the second chamber, the elastic element being connected to the piston rod. When the gas delivery member inflates the first chamber, the piston rod overcomes the elastic force of the elastic element and drives the end of the watch strap to move toward the watch case.

[0030] When the first chamber is vented and / or when the gas delivery member is inflating the second chamber, the elastic member causes the end of the watch strap to move outward toward the watch case.

[0031] When the first chamber is depressurized, the elastic element, through its own elasticity, moves the piston rod and the end of the strap outwards from the watch case, automatically loosening the strap. When the gas delivery component inflates the first chamber, the piston rod must overcome the elasticity of the elastic element to tighten the strap. The elasticity of the elastic element cushions the movement of the piston rod, reducing discomfort caused by sudden tightening of the strap due to excessive inflation pressure. Conversely, when the first chamber is depressurized, the elasticity of the elastic element is released smoothly, gradually moving the end of the strap outwards, reducing sudden loosening of the strap due to rapid gas release. This ensures a gentle and controllable adjustment process, enhancing the user's wearing experience.

[0032] In one possible implementation, the pneumatic regulating device further includes a first exhaust valve connected to the first chamber. When the first exhaust valve is open, the first chamber is vented, and when the gas delivery component fills the first chamber with gas, the first exhaust valve is closed.

[0033] Alternatively, the gas delivery device includes a first bidirectional pump that, in an inflation mode, inflates the first chamber and, in a evacuation mode, evacuates the first chamber.

[0034] The first vent valve is linked to the inflation action of the gas delivery component, reducing gas leakage from the first chamber during inflation and ensuring that the inflation pressure is efficiently converted into the driving force of the piston rod, guaranteeing the reliability of the strap tightening action. During venting, the opening of the first vent valve can be adjusted (e.g., partially opening for slow venting) to precisely control the depressurization rate of the first chamber, reducing sudden changes in strap tightness caused by excessively rapid venting. The first vent valve design is simple in structure and low in cost, effectively reducing the cost of pneumatic adjustment devices.

[0035] The first bidirectional pump's suction mode can actively draw air from the first chamber. Compared to passive venting, this allows for more precise control of the venting volume and speed. For example, when the watch strap needs to be loosened quickly, the suction power of the first bidirectional pump can be adjusted to rapidly depressurize the first chamber, meeting the adjustment needs in emergency scenarios. Furthermore, the first bidirectional pump can both charge and vent the cylinder, eliminating the need for an exhaust valve. This reduces the number of components in the pneumatic adjustment device, helping to simplify assembly.

[0036] In one possible implementation, a first sealing ring can be provided on the outer periphery of the piston portion, and the first sealing ring can be clamped between the inner side of the piston portion and the cylinder body.

[0037] The first sealing ring can reduce the direct flow of gas between the first and second chambers, thus ensuring the adjustment accuracy of the cylinder.

[0038] In one possible implementation, the pneumatic component includes an airbag disposed on the side of the watch case and / or the watch strap near the user's wrist, the airbag also having a vent hole communicating with the gas cavity, and the gas delivery component communicating with the gas cavity through the vent hole.

[0039] When the gas delivery device fills the gas cavity with gas, the airbag is inflated.

[0040] When the airbag is inflated, the gap between the watch strap and the user's wrist is smaller than the gap between the watch strap and the user's wrist when the airbag is deflated.

[0041] The airbag is made of flexible material. When the gas delivery device inflates the airbag, it expands evenly and conforms to the contour of the wrist, adapting to the curvature of different parts of the wrist and improving wearing comfort. When the airbag deflates, it allows the wearable device to quickly return to a loose state, reducing the restriction on the skin of the wrist.

[0042] In one possible implementation, the airbag is provided with a second exhaust valve communicating with the gas cavity of the airbag. When the second exhaust valve is open, the gas cavity is vented, and when the gas delivery component inflates the gas cavity, the second exhaust valve is closed.

[0043] or,

[0044] The gas delivery device includes a second bidirectional pump, which inflates the gas cavity in an inflation mode and evacuates the gas cavity in an evacuation mode.

[0045] The second exhaust valve is linked to the inflation action of the gas delivery component, reducing gas leakage from the air chamber of the air bladder during inflation and ensuring that the inflation pressure is efficiently converted into the expansion force of the air bladder, thus guaranteeing the stability of the strap tightening action. During deflation, the opening of the second exhaust valve can be adjusted (e.g., partially opening for slow deflation) to precisely control the depressurization rate of the air chamber of the air bladder, reducing sudden changes in strap tightness caused by excessively rapid deflation. The second exhaust valve design is simple in structure and low in cost, effectively reducing the cost of pneumatic adjustment devices.

[0046] The second bidirectional pump can actively draw air from the airbag in the air extraction mode. Compared with passive air extraction, it can more accurately control the amount and speed of air extraction and precisely adjust the tightness of the watch strap.

[0047] Secondly, a watch strap tension adjustment device is provided for use in wearable devices. The watch strap tension adjustment device includes a watch strap and the aforementioned pneumatic adjustment device. The gas delivery component of the pneumatic adjustment device is installed inside the watch case of the wearable device, and the pneumatic component of the pneumatic adjustment device is connected to the watch strap.

[0048] The gas delivery component of the pneumatic adjustment device is installed inside the watch case, and the pneumatic assembly is directly connected to the watch strap. Users can adjust the tightness of the watch strap by controlling the pneumatic assembly through the gas delivery component, without having to open the clasp or other parts, thus enhancing the intelligence of wearable devices. The gas delivery component of the pneumatic adjustment device can precisely control the air pressure within the gas chamber, enabling fine-tuning of the watch strap tightness and meeting personalized wearing needs in different scenarios.

[0049] In one possible implementation, the pneumatic component includes a cylinder connected to the end of the watch strap, wherein the cylinder body and piston rod move relative to each other, thereby causing the end of the watch strap to move relative to the watch case.

[0050] The cylinder is directly connected to the end of the watchband, and the relative motion between the cylinder body and the piston rod is directly converted into the displacement of the watchband end, reducing force loss during transmission. The relative motion between the cylinder body and the piston rod has a defined stroke range, and its displacement corresponds stably to the gas input. By controlling the amount of gas supplied to or discharged from the cylinder through the gas delivery component, the movement distance of the piston rod can be precisely controlled, thereby accurately adjusting the displacement of the watchband end and achieving fine-tuning of the watchband tightness.

[0051] In one possible implementation, the pneumatic component includes an airbag disposed on the side of the watchband close to the user's wrist.

[0052] The airbags can be designed in different shapes and sizes to fit various watch strap styles. For example, airbags can be reasonably arranged for both narrow and wide watch straps. Moreover, the inflation degree of the airbags can be precisely controlled by the gas delivery system, enabling adjustments from a slight fit to a tight fixation to meet the needs of users in different scenarios.

[0053] Thirdly, a wearable device is provided, including a watch case, the wearable device further including the aforementioned watch strap tension adjustment device, the watch strap tension adjustment device being connected to the watch case, or the wearable device including the aforementioned pneumatic adjustment device.

[0054] Since the strap tension adjustment device and pneumatic adjustment device in any of the above embodiments can precisely adjust the tightness of the strap and finely adjust the tightness of the strap, wearable devices that include such strap tension adjustment device or pneumatic adjustment device can meet the wearing needs of users in different scenarios.

[0055] In one possible implementation, the watch case has an opening through which the strap of the wearable device passes, and the end of the strap is located inside the watch case, with the end of the strap inside the watch case connected to the cylinder of the pneumatic adjustment device.

[0056] An opening is provided in the watch case, through which the end of the watch strap can be inserted into the watch case. When used with a cylinder, the depth to which the end of the watch strap is inserted into the watch case can be adjusted. Increasing the depth of the insertion of the end of the watch strap can tighten the watch strap, allowing for a tighter fit of the wearable device. Decreasing the depth of the insertion of the end of the watch strap can loosen the watch strap, allowing for a looser fit of the wearable device.

[0057] In one possible implementation, the wearable device includes a controller connected to the pneumatic adjustment device;

[0058] The controller is used to control the pneumatic adjustment device to loosen and / or tighten the watch strap.

[0059] The controller can precisely control the inflation volume of the gas delivery component and the opening duration of the first exhaust valve through preset programs, making the adjustment range of the watch strap tightness quantifiable and repeatable. For the cylinder, the controller can precisely control the inflation volume into the first or second chamber according to instructions, causing the piston rod to move the end of the watch strap a specific distance, so that the tightness of the watch strap meets the user's needs, improving the stability of the wearing experience. For the airbag, the controller can precisely control the inflation volume to achieve the preset expansion degree of the airbag, so that the tightness of the watch strap meets the user's needs, improving the stability of the wearing experience. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the structure of a wearable device provided in an embodiment of this application.

[0061] Figure 2 for Figure 1 The diagram shows a wearable device worn on the wrist.

[0062] Figure 3 This is a schematic diagram of the structure of a pneumatic adjustment device provided in an embodiment of this application applied to a wearable device.

[0063] Figure 4 for Figure 3 The diagram shows a pneumatic adjustment device for tightening the watch strap.

[0064] Figure 5 for Figure 3 The diagram shows a pneumatic adjustment device for loosening the watch strap.

[0065] Figure 6 This is a circuit connection diagram of a wearable device provided in an embodiment of this application.

[0066] Figure 7 This is a schematic diagram of the structure of a pneumatic adjustment device provided in another embodiment of this application, applied to a wearable device.

[0067] Figure 8 for Figure 7 The diagram shows a pneumatic adjustment device for tightening the watch strap.

[0068] Figure 9 for Figure 7 The diagram shows a pneumatic adjustment device for loosening the watch strap.

[0069] Figure 10 A schematic diagram of the circuit connection structure of a wearable device provided in another embodiment of this application.

[0070] Figure 11 This is a schematic diagram of the structure of a pneumatic adjustment device provided in another embodiment of this application, applied to a wearable device.

[0071] Figure 12 for Figure 11 The diagram shows another perspective on the structure of the pneumatic adjustment device applied to wearable devices.

[0072] Figure 13 for Figure 11 The diagram shows a pneumatic adjustment device applied to a wearable device and wrist (tightly worn).

[0073] Figure 14 for Figure 11 The diagram shows a pneumatic adjustment device applied to a wearable device and wrist (loosely worn).

[0074] Figure 15 This is a schematic diagram of the circuit connection structure of a wearable device provided in another embodiment of this application.

[0075] Figure label:

[0076] 1000, Wearable devices; 2000, Wrist;

[0077] 100. Watch case; 1001. Opening; 200. Watch strap tension adjustment device;

[0078] 10. Watch strap; 20. Pneumatic adjustment device;

[0079] 1. Gas conveying components;

[0080] 2. Pneumatic assembly; 21. Cylinder; 211. Cylinder body; 212. Piston rod; 2121. Piston part; 2122. First sealing ring; 213. Elastic element; 201. Gas cavity; 2011. First chamber; 2012. Second chamber; 22. Air bag; 221. Vent connection hole;

[0081] 31. First exhaust valve; 32. Second exhaust valve; 33. Third exhaust valve; 34. Reversing valve;

[0082] 41. First trachea; 42. Second trachea; 43. Third trachea;

[0083] 5. Controller;

[0084] 6. Differential pressure gauge. Detailed Implementation

[0085] The embodiments of this application are described in detail below. Examples of these 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 this application, and should not be construed as limiting this application.

[0086] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0087] In the description of this application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc., indicate the orientation or positional relationship based on the installation orientation or positional relationship, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0088] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0089] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0090] Wearable devices, especially smartwatches, have become deeply integrated into people's daily lives. These devices have data recording capabilities, allowing them to record real-time data on the wearer's daily exercise, sleep patterns, and dietary intake, with user authorization. Through a convenient data synchronization mechanism, this data can be quickly transmitted to smart terminals such as mobile phones and tablets, providing users with scientific and intuitive guidance for a healthy lifestyle and helping them better manage their health.

[0091] Taking wearable devices like smartwatches as an example, in everyday wear scenarios, users typically prefer a looser fit for comfort and comfort. This leaves a gap between the smartwatch and the wrist, effectively reducing pressure and promoting airflow to keep the wrist dry and comfortable, thus improving comfort during extended wear. However, when users are engaged in activities like running or swimming, or when the strap needs to be tightened for purposes such as blood pressure measurement, they prefer a snug fit. This reduces the feeling of discomfort caused by movement during vigorous body movements, ensuring stable data recording and improving the accuracy and reliability of activity monitoring.

[0092] Currently, adjusting the tightness of smartwatch straps often requires users to fully open the clasp, select the appropriate hole on the strap, and then re-fasten the clasp. This process is cumbersome, and the adjustment range is limited by the gap between the buckle holes, resulting in a large adjustment range that makes it difficult to achieve precise adjustments.

[0093] Based on this, embodiments of this application provide a pneumatic adjustment device, a watch strap tension adjustment device, and a wearable device. This solution enables the adjustment of the watch strap tension without opening the buckle, allowing for flexible increase or decrease in the gap between the watch strap and the user's wrist, conveniently adjusting the tightness of the fit to suit different wearing needs in various scenarios.

[0094] Figure 1 This is a schematic diagram of the structure of a wearable device 1000 provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows the wearable device 1000 worn on the wrist 2000.

[0095] Reference Figure 1 and Figure 2 This application first provides a wearable device 1000, which can be a smartwatch, bracelet, etc. The wearable device 1000 has a strap 10, which can be wrapped around the user's wrist 2000 so that the wearable device 1000 can be worn by the user.

[0096] Figure 3 This is a schematic diagram of the structure of a pneumatic adjustment device 20 provided in an embodiment of this application applied to a wearable device 1000.

[0097] Reference Figure 3 In some embodiments, the wearable device 1000 includes a strap tension adjustment device 200. The strap tension adjustment device 200 can be used to adjust the tightness of the strap 10 so that the wearable device 1000 can adapt to the wearing needs of different scenarios.

[0098] In some embodiments, the strap tension adjustment device 200 includes a strap 10 and a pneumatic adjustment device 20, which is used to retract the strap into the housing to reduce the gap between the strap and the user's wrist, and / or to move the strap outward from the housing to increase the gap between the strap and the user's wrist.

[0099] In some embodiments, the wearable device 1000 includes a pneumatic adjustment device 20.

[0100] The specific structure of the pneumatic regulating device 20 involved in the embodiments of this application will be described below.

[0101] Reference Figure 2 and Figure 3 The pneumatic adjustment device 20 provided in this application embodiment is applied to a wearable device 1000 having a watch strap 10. The pneumatic adjustment device 20 includes: a pneumatic component 2 and a gas delivery component 1.

[0102] The pneumatic component 2 has a gas cavity 201. A gas delivery component 1 is installed inside the case 100 of the wearable device 1000. The gas delivery component 1 communicates with the gas cavity 201. The gas delivery component 1 is used to change the air pressure within the gas cavity 201, for example, to fill and / or discharge gas from the gas cavity 201; when the air pressure within the gas cavity 201 changes, the pneumatic component 2 is used to increase or decrease the gap between the watch strap 10 and the user's wrist 2000.

[0103] It is understood that the gas cavity 201 in this embodiment has a vent hole. The gas delivery component 1 can be connected to the vent hole via a gas pipe to fill the gas cavity 201 with gas (such as air) to increase the gas pressure inside the gas cavity 201, or the gas delivery component 1 can discharge gas from the gas cavity 201 to decrease the gas pressure inside the gas cavity 201. For example, when the gas pressure inside the gas cavity 201 increases, the pneumatic component 2 can cause the watch strap 10 to retract into the watch case 100; when the gas pressure inside the gas cavity 201 decreases, the pneumatic component 2 can cause the watch strap 10 to extend out of the watch case 100.

[0104] It should be noted that, Figure 2 In (a), after the watch strap 10 of the wearable device 1000 is loosened, the gap between the watch strap 10 and the wrist 2000 increases, as shown in reference. Figure 2 In (b), after the watch strap 10 is tightened, the gap between the watch strap 10 and the wrist 2000 becomes smaller, that is... Figure 2 In this case, L1 is greater than L2.

[0105] It should be noted that the gas delivery component 1 can be an air pump, a miniature air pump, an air compressor, a fan, etc. In this embodiment, the gas delivery component 1 is a miniature air pump. The gas delivery component 1 can be disposed inside the casing 100 to reduce its impact on the appearance of the wearable device 1000.

[0106] It should be noted that in some embodiments, the gas delivery component 1 can change the total gas content in the gas cavity 201. When the total gas content in the gas cavity 201 changes, the gap between the watch strap 10 and the user's wrist 2000 can be increased or decreased. In other embodiments, the gas cavity 201 can be divided into multiple chambers, and the gas delivery component 1 can change the gas pressure in different chambers.

[0107] It should be noted that the pneumatic component 2 can change its shape according to the change in air pressure within the gas cavity 201, thereby increasing or decreasing the gap between the watch strap 10 and the user's wrist 2000. The pneumatic component 2 can be a pneumatic actuator; for example, it can be an airbag that fills the gap between the watch strap 10 and the user's wrist 2000. When the air pressure in the gas cavity 201 of the airbag increases, the airbag can inflate; when the air pressure decreases, the airbag can return to its original shape; and when the air pressure continues to decrease, the airbag can contract. For example, the pneumatic component 2 may include a cylinder 21. The cylinder body 211 and piston rod 212 of the cylinder 21 may be connected to the end of the watch case 100 and the watch strap 10 of the wearable device 1000, respectively. When the air pressure in the gas chamber 201 of the cylinder 21 changes, the piston rod 212 may move relative to the cylinder body 211 to drive the end of the watch strap 10 to move relative to the watch case 100, thereby increasing or decreasing the gap between the watch strap 10 and the user's wrist 2000. At this time, due to the different lengths of the piston rod 212 extending out of the cylinder body 211, the overall length of the cylinder 21 changes.

[0108] The pneumatic adjustment device 20 provided in this embodiment allows the gas delivery component 1 to change the air pressure inside the gas cavity 201 of the pneumatic component 2, thereby increasing or decreasing the gap between the watch strap 10 and the wrist 2000. The entire adjustment process can be completed without disassembling the clasp, allowing the user to quickly adjust the tightness while wearing the watch. This significantly reduces operational complexity, saves adjustment time, and greatly improves user convenience. The gas delivery component 1 can precisely control the air pressure inside the gas cavity 201 (e.g., a slight increase or decrease in air volume), thereby driving the pneumatic component 2 to achieve subtle changes in the gap between the watch strap 10 and the wrist 2000. The tightness adjustment range of the watch strap 10 is small, enabling fine-tuning. This allows users to precisely adjust the watch strap 10 to their ideal tightness according to their needs, meeting personalized wearing requirements in different scenarios.

[0109] In this embodiment, on one hand, the pneumatic component 2 can reduce or increase the gap between the watch strap 10 and the user's wrist 2000 by causing the watch strap 10 to contract or relax. On the other hand, the pneumatic component 2 can reduce or increase the gap between the watch strap 10 and the user's wrist 2000 by expanding or contracting.

[0110] The following describes how the pneumatic component 2 reduces or increases the gap between the watch strap 10 and the user's wrist 2000 by causing the watch strap 10 to contract or relax.

[0111] Reference Figure 3 In some embodiments, the pneumatic component 2 is connected to the end of the watch strap 10. When the pneumatic component 2 fills the gas cavity 201 with gas, the pneumatic component 2 is used to drive the watch strap 10 to move toward the inside of the watch case 100 or to drive the watch strap 10 to move toward the outside of the watch case 100.

[0112] It should be noted that the two ends of the watch strap 10 are used to connect to the watch case 100. Pneumatic components 2 can be provided at both ends of the watch strap 10, and both ends of the watch strap 10 are connected to the watch case 100 through the pneumatic components 2. The two pneumatic components 2 can be used to pull the two ends of the watch strap 10 to adjust the tightness. Alternatively, pneumatic components 2 can be provided at only one end of the watch strap 10. In this embodiment, one end of the watch strap 10 is connected to the watch case 100 through the pneumatic component 2, and the other end of the watch strap 10 can be directly connected to the watch case 100.

[0113] It should be noted that during the process of the gas conveying component 1 filling the gas cavity 201 with gas, the gas pressure in the gas cavity 201 can be changed. When the gas pressure in the gas cavity 201 reaches a certain level, it can drive the watch strap 10 to move. For example, some parts of the pneumatic component 2 can generate linear movement relative to the watch case 100. These parts can be connected to the watch strap 10, thereby driving the watch strap 10 to move during its movement, and realizing the adjustment of the tightness of the watch strap 10.

[0114] The pneumatic component 2 inflates the gas cavity 201 to move the end of the watch strap 10 into the watch case 100 (tightening the watch strap 10) or out of the watch case 100 (loosening the watch strap 10). The pneumatic component 2 can directly adjust the length of the watch strap 10 and can achieve stepless adjustment of the length of the watch strap 10 according to the change of inflation volume, so as to meet the fine requirements of the tightness of the watch strap in different scenarios.

[0115] Figure 4 for Figure 3 The diagram shows the structure of the pneumatic adjustment device 20 for tightening the watch strap 10. Figure 5 for Figure 3 The diagram shows the structure of the pneumatic adjustment device 20 for loosening the watch strap 10. (Refer to...) Figure 4 and Figure 5 In some embodiments, the pneumatic component 2 includes a cylinder 21 installed inside the watch case 100, and the cylinder 21 is connected to the end of the watch strap 10; when the gas delivery component 1 inflates the cylinder 21, the cylinder 21 is used to drive the watch strap 10 to move toward the inside of the watch case 100, or to drive the end of the watch strap 10 to move toward the outside of the watch case 100.

[0116] It should be noted that, as can be understood, in the embodiments of this application, the cylinder 21 drives the end of the watch strap 10 to move toward the inside of the watch case 100, that is, when the watch strap 10 is retracted into the watch case 100, the watch strap 10 can be tightened, and the cylinder 21 drives the watch strap 10 to move toward the outside of the watch case 100, so as to loosen the watch strap 10.

[0117] As a mature pneumatic actuator, cylinder 21 exhibits a stable linear relationship between its extension / retraction stroke and the gas input. When the gas delivery component 1 inflates cylinder 21, cylinder 21 drives the end of the watchband 10 to achieve quantitative and directional movement, thus significantly improving the precision of the watchband 10's tightness adjustment. By installing cylinder 21 within the watch case 100 of the wearable device 1000, cylinder 21 can be concealed, thereby enhancing the appearance of the wearable device 1000.

[0118] Understandably, the tension adjustment range of the watch strap 10 by the pneumatic adjustment device 20 depends on the extension and retraction stroke of the cylinder 21. For example, when the maximum stroke of the cylinder 21 is 10mm, the tension adjustment range of the watch strap 10 by the pneumatic adjustment device 20 is 0–10mm, meaning that without opening the clasp, the maximum difference between the maximum and minimum effective length of the watch strap 10 is 10mm. When the maximum stroke of the cylinder 21 is 7mm, the tension adjustment range of the watch strap 10 by the pneumatic adjustment device 20 is 0–7mm, meaning that without opening the clasp, the maximum difference between the maximum and minimum effective length of the watch strap 10 is 7mm.

[0119] In some embodiments, a cylinder 21 with a maximum stroke of 7mm to 10mm can be selected. For example, the maximum stroke of the cylinder 21 can be 7mm, 8mm, 9mm, or 10mm, and the corresponding pneumatic adjustment device 20 can adjust the tightness of the watch strap 10 within a range of 0 to 7mm, 0 to 8mm, 0 to 9mm, or 0 to 10mm.

[0120] In addition, when the stroke of cylinder 21 reaches its limit (for example, when cylinder 21 has reached its maximum stroke or the stroke has decreased to 0), the gas delivery component 1 can be shut off to stop the gas supply to cylinder 21. This can reduce the possibility of damage caused by excessive gas pressure inside cylinder 21.

[0121] The following describes how to tighten and loosen the watch strap 10 by using the gas delivery component 1 to inflate the cylinder 21.

[0122] In some embodiments, reference is made to Figure 4 and Figure 5 The cylinder 21 includes a cylinder body 211 and a piston rod 212. One of the cylinder body 211 and the piston rod 212 is connected to the watch case 100, and the other of the cylinder body 211 and the piston rod 212 is connected to the end of the watch strap 10. The cylinder body 211 and the piston rod 212 can move relative to each other to drive the end of the watch strap 10 to move relative to the watch case 100. A gas chamber 201 is provided inside the cylinder body 211. The gas chamber 201 has a first chamber 2011 and a second chamber 2012. The first chamber 2011 and the second chamber 2012 are separated by the piston portion 2121 of the piston rod 212.

[0123] The gas delivery component 1 is connected to the first chamber 2011 and the second chamber 2012. The gas delivery component 1 is used to fill gas into or discharge gas from either the first or second chamber, so that a pressure difference is formed on both sides of the piston.

[0124] When the pressure on the piston portion 2121 facing the first chamber 2011 is greater than the pressure on the piston portion 2121 facing the second chamber 2012, the piston rod 212 causes the end of the watch strap 10 to move inward relative to the watch case 100. When the pressure on the piston portion 2121 facing the first chamber 2011 is less than the pressure on the piston portion 2121 facing the second chamber 2012, the piston rod 212 causes the end of the watch strap 10 to move outward relative to the watch case 100.

[0125] When the pressure on the piston 2121 towards the first chamber 2011 is greater than the pressure on the piston 2121 towards the second chamber 2012, the piston rod 212 moves in the direction of compressing the second chamber 2012, thereby moving the watch strap 10. During this process, the watch strap 10 is tightened. When the pressure on the piston 2121 towards the first chamber 2011 is less than the pressure on the piston 2121 towards the second chamber 2012, the piston rod 212 moves in the direction of compressing the first chamber 2011, thereby moving the watch strap 10. During this process, the watch strap 10 is loosened.

[0126] Reference Figure 4 and Figure 5 In this embodiment, when the gas delivery member 1 is supplying gas to the first chamber 2011, the piston rod 212 causes the end of the watch strap 10 to move inward relative to the watch case 100. When the gas delivery member 1 is supplying gas to the second chamber 2012, the piston rod 212 causes the end of the watch strap 10 to move outward relative to the watch case 100.

[0127] It is understood that in this embodiment, when the air pressure in the first chamber 2011 and the second chamber 2012 are equal, the pressure on both sides of the piston portion 2121 is equal, and no relative movement occurs between the piston rod 212 and the cylinder 211.

[0128] When the gas delivery component 1 inflates the first chamber 2011, it changes the pressure difference between the two chambers, making the air pressure in the first chamber 2011 greater than that in the second chamber 2012. Because the pressures on both sides of the piston 2121 are different, the piston rod 212 moves in the direction of compressing the second chamber 2012, thus moving the watch strap 10. During this process, the watch strap 10 is tightened. When the gas delivery component 1 stops inflating the first chamber 2011, and the movement of the piston 2121 increases the volume of the first chamber 2011 and decreases the volume of the second chamber 2012, causing the air pressures in the first and second chambers to return to equal, the forces on both sides of the piston 2121 are balanced, and the piston rod 212 can stop moving, thus stopping the tightening of the watch strap 10.

[0129] When the gas delivery component 1 inflates the second chamber 2012, it changes the pressure difference between the two chambers, making the gas pressure in the second chamber 2012 greater than that in the first chamber 2011. The piston rod 212 moves in the direction of compressing the first chamber 2011, causing the watch strap 10 to move. During this process, the watch strap 10 is loosened. When the gas delivery component stops inflating the second chamber 2012, and the movement of the piston portion 2121 increases the volume of the second chamber 2012 and decreases the volume of the first chamber 2011, causing the gas pressures in the first and second chambers 2012 to return to equal, the forces on both sides of the piston portion 2121 are balanced, and the piston rod 212 can stop moving, thus stopping the loosening of the watch strap 10.

[0130] It should be noted that in some embodiments, the cylinder 211 can be connected to the watch case 100, and the piston rod 212 can be connected to the end of the watch strap 10. In this embodiment, the cylinder 211 is fixed by the watch case 100, and the piston rod 212 can move relative to the watch case 100 to adjust the tightness of the watch strap 10. In other embodiments, the cylinder 211 can be connected to the end of the watch strap 10, and the piston rod 212 can be connected to the watch case 100. In this embodiment, the piston rod 212 is fixed by the watch case, and the cylinder 211 can move relative to the watch case 100 to adjust the tightness of the watch strap 10. The embodiments of this application are not limited here. In the embodiments of this application, the cylinder 211 is fixedly connected to the watch case 100, and the piston rod 212 is connected to the end of the watch strap 10. Furthermore, the piston rod 212 and the watch strap 10 can be a single piece or two independent components, which can be connected by adhesive, threaded connection, or other methods.

[0131] It should be noted that in some embodiments, when the gas delivery component 1 inflates the first chamber 2011, the piston rod 212 drives the end of the watch strap 10 to move inward relative to the watch case 100. When the gas delivery component 1 inflates the second chamber 2012, the piston rod 212 drives the end of the watch strap 10 to move outward relative to the watch case 100. In addition, when the gas delivery component 1 inflates the second chamber 2012, the first chamber 2011 may or may not vent air.

[0132] As an example, in such Figure 4 or Figure 5 In the embodiment shown, cylinder 21 may be a double-acting cylinder.

[0133] Since the first chamber 2011 and the second chamber 2012 are independent of each other and isolated by the piston part 2121, the crossflow of gas between the two chambers can be effectively reduced or avoided, ensuring the stability of the driving force of the air pressure on the piston rod 212. When air is charged into the first chamber 2011, a pressure difference is formed on both sides of the piston part 2121, which can stably push the piston rod 212 to move, thereby driving the end of the watch strap 10 to move into the watch case 100; similarly, when air is charged into the second chamber 2012, a stable reverse pressure difference is also formed on both sides of the piston part 2121, driving the end of the watch strap 10 to move out of the watch case 100. This stable driving force transmission can reduce phenomena such as jamming and shaking during the adjustment process, and improve the reliability of the pneumatic adjustment device 20.

[0134] In some embodiments, a first sealing ring 2122 may be provided on the outer periphery of the piston portion 2121. The first sealing ring 2122 may be clamped between the piston portion 2121 and the inner side of the cylinder body 211. In this way, the flow of gas between the first chamber 2011 and the second chamber 2012 can be reduced to ensure the adjustment accuracy of the cylinder 21.

[0135] Continue to refer to Figure 4 and Figure 5 In one possible embodiment of this application, the pneumatic regulating device 20 includes a reversing valve 34, a first air pipe 41, a second air pipe 42, and a third air pipe 43.

[0136] The first connection port of the reversing valve 34 is connected to the first chamber 2011 through the first air pipe 41, the second connection port of the reversing valve 34 is connected to the second chamber 2012 through the second air pipe 42, and the third connection port of the reversing valve is connected to the gas delivery component 1 through the third air pipe 43. The reversing valve 34 is used to switch the flow path of the gas so that the gas enters the first chamber 2011 through the first air pipe 41 or enters the second chamber through the second air pipe 42.

[0137] It should be noted that the directional valve 34 can be a solenoid valve.

[0138] It is understandable that the reversing valve 34 can also independently connect the gas delivery pipeline between the gas delivery component 1 and the first gas pipe 41, or independently connect the gas delivery pipeline between the gas delivery component 1 and the second gas pipe 42. In addition, the reversing valve 34 can simultaneously connect the gas delivery pipeline between the gas delivery component 1 and the first gas pipe 41, as well as the gas delivery pipeline between the gas delivery component 1 and the second gas pipe 42.

[0139] The first air pipe 41 connects to the first chamber 2011, and the second air pipe 42 connects to the second chamber 2012. With the help of the reversing valve 34, selective flow of gas delivery lines between the gas delivery component 1 and the two air pipes is achieved, enabling independent inflation control of the first chamber 2011 and the second chamber 2012. For example, when the watch strap 10 needs to be tightened, the reversing valve 34 connects the gas delivery component 1 to the first air pipe 41, inflating only the first chamber 2011; when the watch strap 10 needs to be loosened, the gas delivery component 1 connects to the second air pipe 42, inflating only the second chamber 2012. Thus, it is not necessary to configure a separate gas delivery component 1 for each chamber; that is, the first chamber 2011 and the second chamber 2012 can share the same gas delivery component 1, which helps to reduce the space occupied by the pneumatic adjustment device 20 within the watch case 100.

[0140] Figures 3 to 5 The cylinder 21 shown is a double-acting cylinder 21. When the first chamber 2011 is filled with air, the second chamber 2012 can be vented. When the second chamber 2012 is filled with air, the first chamber 2011 can be vented. In this way, during the filling and venting process, the pressure difference on both sides of the piston section 2121 can be significantly increased, causing the piston rod 212 to move.

[0141] Figure 6 This is a circuit connection diagram of a wearable device 1000 provided in an embodiment of this application.

[0142] Reference Figures 3 to 6 In some embodiments, the pneumatic regulating device 20 includes a first exhaust valve 31 and a third exhaust valve 33. The first exhaust valve 31 can be disposed in the first air pipe 41 or in the cylinder 21, and the first exhaust valve 31 is connected to the first chamber 2011. The third exhaust valve 33 can be disposed in the second air pipe 42 or in the cylinder 21, and the third exhaust valve 33 is connected to the second chamber 2012. When the first exhaust valve 31 is open, the first chamber 2011 exhausts air; when the third exhaust valve 33 is open, the second chamber 2012 exhausts air. In actual use, when inflating the first chamber 2011, the first exhaust valve 31 can be closed and the third exhaust valve 33 can be opened; when inflating the second chamber 2012, the first exhaust valve 31 can be opened and the third exhaust valve 33 can be closed.

[0143] The gas delivery unit 1 includes a first bidirectional pump, which can fill the first chamber 2011 or the second chamber 2012 with gas in the filling mode, and can extract gas from the first chamber 2011 or the second chamber 2012 with gas in the evacuation mode.

[0144] It should be noted that, for Figures 3 to 5 The cylinder 21 shown may not have a first exhaust valve 31 and a third exhaust valve 33. When it is necessary to exhaust the first chamber 2011, the first air pipe 41 and the first bidirectional pump can be connected through the reversing valve 34, and the first bidirectional pump can be put into the suction mode to evacuate the first chamber 2011. When it is necessary to exhaust the second chamber 2012, the second air pipe 42 and the first bidirectional pump can be connected through the first air pump, and the first bidirectional pump can be put into the suction mode to evacuate the second chamber 2012.

[0145] The first bidirectional pump can actively draw air from the first chamber 2011. Compared to passive venting, this allows for more precise control of the venting volume and speed. For example, when the watch strap 10 needs to be quickly loosened, the pumping power of the first bidirectional pump can be adjusted to rapidly depressurize the first chamber 2011, meeting the adjustment needs in emergency situations. Furthermore, the first bidirectional pump can both charge and vent the cylinder 21, eliminating the need for an exhaust valve. This reduces the number of components in the pneumatic adjustment device 20, helping to simplify assembly.

[0146] Figure 7 This is a schematic diagram of the structure of a pneumatic adjustment device 20 provided in another embodiment of this application, applied to a wearable device 1000. Figure 8 for Figure 7 The diagram shows the structure of the pneumatic adjustment device 20 for tightening the watch strap 10. Figure 9 for Figure 7 The diagram shows the structure of the pneumatic adjustment device 20 for loosening the watch strap 10.

[0147] Reference Figures 7 to 9 In some embodiments, when the gas delivery component 1 pressurizes the cylinder 21, the cylinder 21 is used to drive the end of the watch strap 10 to move toward the inside of the watch case 100; when the cylinder 21 exhausts gas, the cylinder 21 is used to drive the end of the watch strap 10 to move toward the outside of the watch case 100.

[0148] As a mature pneumatic actuator, cylinder 21 exhibits a stable linear relationship between its extension / retraction stroke and the gas input. When the gas delivery component 1 charges cylinder 21 and cylinder 21 discharges gas, cylinder 21 can drive the end of the watchband 10 to achieve quantitative and directional movement, thus significantly improving the accuracy of the watchband 10's tightness adjustment. By installing cylinder 21 inside the watch case 100 of the wearable device 1000, cylinder 21 can be concealed, thereby improving the appearance of the wearable device 1000.

[0149] Continue to refer to Figures 7 to 9 The cylinder 21 includes a cylinder body 211 and a piston rod 212. One of the cylinder body 211 and the piston rod 212 is connected to the watch case 100, and the other of the cylinder body 211 and the piston rod 212 is connected to the end of the watch strap 10. The cylinder body 211 and the piston rod 212 can move relative to each other to drive the end of the watch strap 10 to move relative to the watch case 100. A gas chamber 201 is provided inside the cylinder body 211. The gas chamber 201 has a first chamber 2011 and a second chamber 2012. The first chamber 2011 and the second chamber 2012 are separated by the piston portion 2121 of the piston rod 212.

[0150] When the pressure on the piston portion 2121 facing the first chamber 2011 is greater than the pressure on the piston portion 2121 facing the second chamber 2012, the piston rod 212 causes the end of the watch strap 10 to move inward relative to the watch case 100. When the pressure on the piston portion 2121 facing the first chamber 2011 is less than the pressure on the piston portion 2121 facing the second chamber 2012, the piston rod 212 causes the end of the watch strap 10 to move outward relative to the watch case 100.

[0151] When the pressure on the piston 2121 towards the first chamber 2011 is greater than the pressure on the piston 2121 towards the second chamber 2012, the piston rod 212 moves in the direction of compressing the second chamber 2012, thereby moving the watch strap 10. During this process, the watch strap 10 is tightened. When the pressure on the piston 2121 towards the first chamber 2011 is less than the pressure on the piston 2121 towards the second chamber 2012, the piston rod 212 moves in the direction of compressing the first chamber 2011, thereby moving the watch strap 10. During this process, the watch strap 10 is loosened.

[0152] The second chamber 2012 is a sealed chamber. When the gas delivery component 1 fills the first chamber 2011 with gas, the pressure on the piston portion 2121 facing the first chamber 2011 is greater than the pressure on the piston portion 2121 facing the second chamber 2012. The piston rod 212 then moves the end of the watch strap 10 inward relative to the watch case 100. When the first chamber 2011 is depressurized, the pressure on the piston portion 2121 facing the first chamber 2011 is greater than the pressure on the piston portion 2121 facing the second chamber 2012. The piston rod 212 then moves the end of the watch strap 10 outward relative to the watch case 100.

[0153] It is understandable that when the gas delivery component 1 is not being filled with gas, the pressure on both sides of the piston section 2121 is equal, and there is no relative movement between the piston rod 212 and the cylinder body 211. In this case, the pressure on the side of the piston section 2121 facing the second chamber 2012 can come from the pressure of the gas in the second chamber 2012, or from the pressure of other components of the cylinder.

[0154] When the gas delivery component 1 inflates the first chamber 2011, it increases the gas pressure in the first chamber 2011. This increased pressure pushes the piston 2121 towards compressing the second chamber 2012, thereby moving the watch strap 10. This increases the volume of the first chamber 2011 and decreases the volume of the second chamber 2012, during which the watch strap 10 is tightened. When the gas delivery component stops inflating the first chamber 2011 and the pressure on both sides of the piston 2121 returns to equality, the forces on both sides of the piston 2121 are balanced, and the piston rod 212 can stop moving, thus stopping the tightening of the watch strap 10.

[0155] When the first chamber 2011 is vented, the air pressure in the first chamber 2011 can be reduced. After the air pressure in the first chamber 2011 is reduced, the piston part 2121 can move in the direction of compressing the first chamber 2011 to drive the watch strap 10 to move. During this process, the watch strap 10 is loosened. When the first chamber 2011 stops venting, and because the movement of the piston part 2121 reduces the volume of the first chamber 2011 and increases the volume of the second chamber 2012, the pressure on both sides of the piston part 2121 is restored to equal, the forces on both sides of the piston part 2121 are balanced, the piston rod 212 can stop moving, and the loosening of the watch strap 10 is stopped.

[0156] As an example, Figures 7 to 9 The cylinder 21 shown can be a single-acting cylinder.

[0157] Since the first chamber 2011 and the second chamber 2012 are independent of each other and isolated by the piston part 2121, the crossflow of gas between the two chambers can be effectively reduced or avoided, ensuring the stability of the driving force of the air pressure on the piston rod 212. When the first chamber 2011 is filled with air, a pressure difference is formed on both sides of the piston part 2121, which can stably push the piston rod 212 to move, thereby driving the end of the watch strap 10 to move into the watch case 100; similarly, when the first chamber 2011 is depressurized, a stable reverse pressure difference is also formed on both sides of the piston part 2121, driving the end of the watch strap 10 to move out of the watch case 100. This stable driving force transmission can reduce phenomena such as jamming and shaking during the adjustment process, and improve the reliability of the pneumatic adjustment device 20.

[0158] Compared to Figures 3 to 5 The double-acting cylinder shown is Figures 7 to 9 The single-acting cylinder shown has a simpler air path design, eliminating the need for a reversing valve to control the gas flow, reducing the number of parts, and facilitating maintenance. Furthermore, it improves the reliability of the pneumatic regulator 20 and allows for a more compact internal structure of the wearable device 1000.

[0159] In some embodiments, the gas delivery component 1 can be connected to the first gas pipe 41. Figures 7 to 9 The first chamber 2011 of the cylinder 21 shown is connected.

[0160] Reference Figures 7 to 9 In some embodiments, the cylinder 21 further includes an elastic element 213 disposed in the first chamber 2011 and / or the second chamber 2012. The elastic element 213 is connected to the piston rod 212. During the process of the gas delivery member 1 filling the first chamber 2011 with gas, the piston rod 212 overcomes the elastic force of the elastic element 213 and drives the end of the watch strap 10 to move toward the inside of the watch case 100. When the first chamber 2011 is venting gas, the elastic element 213 drives the end of the watch strap 10 to move toward the outside of the watch case 100.

[0161] It should be noted that the elastic element 213 can be set in Figures 7 to 9 The first chamber 2011 of the cylinder 21 shown can also be located in the second chamber 2012, and elastic elements 213 can be provided in both the first chamber 2011 and the second chamber 2012. For example, when the elastic element 213 is located in the first chamber 2011, during the process of the gas conveying member 1 filling the first chamber 2011 with gas, the piston rod 212 moves in the direction of compressing the second chamber 2012, and the elastic element 213 is stretched. During the process of venting gas from the first chamber 2011 and / or filling gas into the second chamber 2012 with gas, the tension generated by the contraction of the elastic element 213 can drive the piston rod 212 to move and reset in the direction of compressing the first chamber 2011. When the elastic element 213 is disposed in the second chamber 2012, during the process of inflating the first chamber 2011, the piston rod 212 moves toward the direction of compressing the second chamber 2012, and the elastic element 213 is compressed. During the process of venting the first chamber 2011 and / or inflating the second chamber 2012 with gas, the expansion thrust of the elastic element 213 can drive the piston rod 212 to move and reset toward the direction of compressing the first chamber 2011.

[0162] As an example, the elastic element 213 can be a component with elastic deformation capability, such as a spring, disc spring, or rubber block.

[0163] When the first chamber 2011 is vented, the elastic element 213 can use its own elastic force to drive the piston rod 212 and the end of the strap 10 to move outward toward the watch case 100, thereby automatically loosening the strap 10. When the gas delivery element 1 inflates the first chamber 2011, the piston rod 212 needs to overcome the elastic force of the elastic element 213 to tighten the strap 10. The elastic force of the elastic element 213 can buffer the movement of the piston rod 212, reducing the discomfort caused by the sudden tightening of the strap 10 due to excessive inflation pressure. When the first chamber 2011 is vented, the elastic force of the elastic element 213 is released smoothly, causing the end of the strap 10 to gradually move outward, reducing the sudden loosening of the strap 10 due to rapid gas discharge, ensuring that the adjustment process is gentle and controllable, and improving the user's wearing experience.

[0164] In addition, an elastic element 213 can also be provided inside the double-acting cylinder, for example, Figures 3 to 5 The cylinder 21 shown is a double-acting cylinder, and the elastic element 213 can be set in... Figures 3 to 5 The cylinder 21 shown is located in the first chamber 2011, or is disposed in Figures 3 to 5 The second chamber 2012 of the cylinder 21 shown can also contain... Figures 3 to 5 The cylinder 21 shown is provided with elastic elements 213 in both the first chamber 2011 and the second chamber 2012. At this time, the power for the piston rod 212 to reset comes from both the pressure difference generated by the air pressure and the elastic force of the elastic element 213.

[0165] Figure 10 A schematic diagram of the circuit connection structure of a wearable device 1000 provided in another embodiment of this application.

[0166] Reference Figures 7 to 10 In some embodiments, the pneumatic regulating device 20 further includes a first exhaust valve 31 that connects to the first chamber 2011. When the first exhaust valve 31 is open, the first chamber 2011 exhausts gas. When the gas conveying member 1 fills the first chamber 2011 with gas, the first exhaust valve 31 is closed.

[0167] It should be noted that, for Figures 7 to 9 The cylinder 21 shown has a gas delivery component 1 that only fills the first chamber 2011. Thus, the first exhaust valve 31 can be provided only for the first chamber 2011, and the second chamber 2012 does not need to be provided with a corresponding exhaust valve. Figures 7 to 9 The first chamber 2011 of the cylinder 21 shown is connected to the gas delivery component 1 via a first air pipe 41. The first exhaust valve 31 can be located on the first air pipe 41 or directly installed on the cylinder 21, provided that the first exhaust valve 31 can communicate with the first chamber 2011. Furthermore... Figures 3 to 9 The gas delivery component 1 shown can be an air pump, meaning it only has an inflation function and no deflation function. Figures 3 to 9The gas delivery component 1 shown can also be a bidirectional pump. In this case, the gas delivery component 1 has the functions of filling and pumping gas, but the first chamber 2011 relies on the first exhaust valve 31 for exhaust.

[0168] The first exhaust valve 31 is linked to the inflation action of the gas delivery component 1, which can reduce gas leakage from the first chamber 2011 during inflation, ensuring that the inflation pressure can be efficiently converted into the driving force of the piston rod 212, and guaranteeing the reliability of the tightening action of the watch strap 10. During venting, the opening degree of the first exhaust valve 31 can be adjusted (such as partially opening to achieve slow venting), which can precisely control the depressurization rate of the first chamber 2011, reducing sudden changes in the tightness of the watch strap 10 caused by excessively rapid venting. The first exhaust valve 31 solution has a simple structure and low cost, which can effectively reduce the cost of the pneumatic adjustment device 20.

[0169] In other embodiments, the gas delivery device 1 includes a first bidirectional pump that inflates the first chamber 2011 in an inflation mode and evacuates the first chamber 2011 in an evacuation mode.

[0170] It should be noted that, for Figures 7 to 9 The cylinder 21 shown can be used without the first exhaust valve 31 in the pneumatic adjustment device 20. When it is necessary to exhaust the first chamber 2011, the first bidirectional pump can be started directly in the suction mode to evacuate the first chamber 2011.

[0171] The first bidirectional pump can actively draw air from the first chamber 2011. Compared to passive venting, this allows for more precise control of the venting volume and speed. For example, when the watch strap 10 needs to be quickly loosened, the pumping power of the first bidirectional pump can be adjusted to rapidly depressurize the first chamber 2011, meeting the adjustment needs in emergency situations. Furthermore, the first bidirectional pump can both charge and vent the cylinder 21, eliminating the need for an exhaust valve. This reduces the number of components in the pneumatic adjustment device 20, helping to simplify assembly.

[0172] The following describes how the pneumatic component 2 can reduce or increase the gap between the watch strap 10 and the user's wrist 2000 by expanding or contracting.

[0173] Figure 11 This is a schematic diagram of the structure of a pneumatic adjustment device 20 provided in another embodiment of this application applied to a wearable device 1000. Figure 12 for Figure 11 The pneumatic adjustment device 20 shown is applied to a wearable device 1000 from another perspective. Figure 13 for Figure 11 The diagram shows the structure of the pneumatic adjustment device 20 applied to the wearable device 1000 and the wrist 2000 (tightly worn). Figure 14 for Figure 11 The diagram shows the structure of the pneumatic adjustment device 20 applied to the wearable device 1000 and the wrist 2000 (loosely worn).

[0174] Reference Figure 11 and Figure 12 In other embodiments, the pneumatic component 2 includes an airbag 22 disposed on the side of the watch case 100 and / or the watch strap 10 near the user's wrist 2000. The airbag 22 also has a venting connection hole 221 communicating with a gas cavity 201. The gas delivery component 1 is connected to the gas cavity 201 of the airbag 22.

[0175] Reference Figure 13 When the gas delivery component 1 fills the gas cavity 201 with gas, the airbag 22 is in an inflated state. When the airbag 22 is inflated, the gap between the watch strap 10 and the user's wrist 2000 is smaller than the gap between the watch strap 10 and the user's wrist 2000 when the airbag is in a deflated state.

[0176] Reference Figure 14 When the gas chamber 201 exhausts gas, it increases the gap between the watch strap 10 and the user's wrist 2000; that is, Figure 13 The gap L3 in the middle is less than Figure 14 The gap L4 in the middle.

[0177] It should be noted that in some embodiments, the airbag 22 can be disposed on the side of the watch case 100 facing the user's wrist 2000; in other embodiments, the airbag 22 can be disposed on the side of the watch strap 10 near the user's wrist 2000; and in still other embodiments, a portion of the airbag 22 can be disposed on the side of the watch case 100 facing the user's wrist 2000, while another portion of the airbag 22 is disposed on the side of the watch strap 10 near the user's wrist 2000. When the airbag 22 is disposed on the watch strap 10, the airbag 22 can be disposed on the surface of the watch strap 10 or inside the watch strap 10, located on the side of the watch strap 10 near the user's wrist 2000.

[0178] It should be noted that the airbag 22 being in a contracted state includes two situations: one is that the gas in the airbag 22 is empty or the gas content is low; the other is that the airbag 22 is not inflated, and the airbag 22 is in a naturally collapsed, contracted, and flat state. The inflated state of the airbag 22 refers to the state in which a certain amount of gas is injected into the airbag 22, causing its volume to increase.

[0179] Understandably, the airbag 22 is made of flexible material. When the gas delivery component 1 inflates the airbag 22, the airbag 22 will expand evenly to fill the gap between the wrist and the watch strap, improving wearing comfort. When the airbag 22 is in a contracted state, it creates a larger gap between the watch strap and the wrist, resulting in a looser fit.

[0180] In this embodiment, the wearable device 1000 can determine and control the inflation degree of the airbag 22 by detecting the air pressure in the gas cavity 201 of the airbag 22. For example, the wearable device 1000 may include a component with air pressure detection function (such as a differential pressure gauge), which can detect the air pressure in the gas cavity 201 during the inflation of the airbag 22 by the gas delivery component 1. In some cases, the wearable device 1000 can automatically control the gas delivery component 1 to inflate the airbag 22 to adjust the watchband 10 to a tight fit. In this case, when the component with air pressure detection function detects that the air pressure in the gas cavity 201 has reached a preset maximum air pressure, the wearable device 1000 can control the gas delivery component 1 to stop inflating the airbag 22. Furthermore, the component with air pressure detection function can directly detect the air pressure in the gas cavity 201, or it can detect the pressure difference between the air pressure in the gas cavity 201 and the external environment. For example, when the pressure difference between the gas cavity 201 and the external environment is 0.04 MPa, the wearable device 1000 can control the gas delivery component 1 to stop inflating the airbag 22.

[0181] Figure 15 This is a schematic diagram of the circuit connection structure of a wearable device 1000 provided in another embodiment of this application.

[0182] Reference Figures 11 to 15 In some embodiments, the airbag 22 is provided with a second exhaust valve 32 that communicates with the gas cavity 201 of the airbag 22. When the second exhaust valve 32 is open, the gas cavity 201 is vented. When the gas delivery component 1 inflates the gas cavity 201, the second exhaust valve 32 is closed.

[0183] It should be noted that the gas delivery component 1 in this embodiment can be an air pump, that is, the gas delivery component 1 only has an inflation function and no degassing function. Of course, the gas delivery component 1 in this embodiment can also be a bidirectional pump. In this case, the gas delivery component 1 has both inflation and degassing functions, but the gas chamber 201 of the airbag 22 relies on the second exhaust valve 32 to exhaust gas.

[0184] The second exhaust valve 32 is linked to the inflation action of the gas delivery component 1, which can reduce gas leakage from the gas cavity 201 of the airbag 22 during inflation, ensuring that the inflation pressure is efficiently converted into the expansion force of the airbag 22, and guaranteeing the stability of the tightening action of the watch strap 10. During deflation, the opening degree of the second exhaust valve 32 can be adjusted (e.g., partially opening to achieve slow deflation), which can precisely control the depressurization rate of the gas cavity 201 of the airbag 22, reducing sudden changes in the tightness of the watch strap 10 caused by excessively rapid deflation. The second exhaust valve 32 solution has a simple structure and low cost, which can effectively reduce the cost of the pneumatic adjustment device 20.

[0185] In other embodiments, the gas delivery device 1 includes a second bidirectional pump that inflates the gas chamber 201 in an inflation mode and evacuates the gas chamber 201 in an evacuation mode.

[0186] It should be noted that in this embodiment, the pneumatic regulating device 20 may not be equipped with a second exhaust valve 32, and the gas in the gas chamber 201 of the airbag 22 is extracted by a second bidirectional pump.

[0187] In the second bidirectional pump mode, air can be actively drawn from the airbag 22. Compared with passive exhaust, it can more accurately control the exhaust volume and speed, and precisely adjust the tightness of the strap 10.

[0188] This application embodiment also provides a watch strap tension adjustment device 200, which is applied to a wearable device 1000. The watch strap tension adjustment device 200 includes a watch strap 10 and a pneumatic adjustment device 20 as described in any of the above embodiments. The gas delivery component 1 of the pneumatic adjustment device 20 is installed inside the watch case 100, and the pneumatic component 2 of the pneumatic adjustment device 20 is connected to the watch strap 10.

[0189] The gas delivery component 1 of the pneumatic adjustment device 20 is installed inside the watch case 100, and the pneumatic component 2 is directly connected to the watch strap 10. Users can adjust the tightness of the watch strap 10 by controlling the pneumatic component 2 through the gas delivery component 1, eliminating the need to open the clasp or other parts, thus enhancing the intelligence of the wearable device 1000. The gas delivery component 1 of the pneumatic adjustment device 20 can precisely control the air pressure within the gas cavity 201, enabling fine-tuning of the tightness of the watch strap 10 and meeting personalized wearing needs in different scenarios.

[0190] In some embodiments, the pneumatic component 2 includes a cylinder 21 connected to the end of the watch strap 10. When the cylinder body 211 and the piston rod 212 of the cylinder 21 move relative to each other, the end of the watch strap 10 can move relative to the watch case 100.

[0191] It should be noted that the two ends of the watch strap 10 are used to connect to the watch case 100. A cylinder 21 can be provided for both ends of the watch strap 10, and both ends of the watch strap 10 are connected to the watch case 100 through the cylinder 21. The two cylinders 21 can pull the two ends of the watch strap 10 to adjust the tightness. Alternatively, a cylinder 21 can be provided for only one end of the watch strap 10. In this embodiment, one end of the watch strap 10 is connected to the watch case 100 through the cylinder 21, and the other end of the watch strap 10 can be directly connected to the watch case 100.

[0192] It should be noted that cylinder 21 can be a double-acting cylinder in the above embodiments or a single-acting cylinder in the above embodiments.

[0193] The cylinder 21 is directly connected to the end of the watchband 10. The relative motion between the cylinder body 211 and the piston rod 212 can be directly converted into the displacement of the end of the watchband 10, reducing the loss of force during transmission. The relative motion between the cylinder body 211 and the piston rod 212 of the cylinder 21 has a defined stroke range, and its displacement has a stable correspondence with the gas input. By controlling the amount of gas injected or discharged into the cylinder 21 by the gas delivery component 1, the moving distance of the piston rod 212 can be precisely controlled, thereby accurately adjusting the displacement of the end of the watchband 10 and achieving fine adjustment of the tightness of the watchband 10.

[0194] In some embodiments, the watch strap 10 and the piston rod 212 of the cylinder 21 can be a single piece.

[0195] In some embodiments, the pneumatic component 2 includes an airbag 22 disposed on the side of the watch strap 10 near the user's wrist 2000.

[0196] It should be noted that in some embodiments, the strap tension adjustment device 200 may only have an air bladder 22 without a cylinder 21, and the strap tension adjustment device 200 relies on the air bladder 22 to adjust the tension of the strap 10; in other embodiments, the strap tension adjustment device 200 may only have a cylinder 21 without an air bladder 22, and the strap tension adjustment device 200 relies on the cylinder 21 to adjust the tension of the strap 10; in still other embodiments, the strap tension adjustment device 200 may have both a cylinder 21 and an air bladder 22, and both the cylinder 21 and the air bladder 22 may be used to adjust the tension of the strap 10.

[0197] It should be noted that the airbag 22 is located on the side of the watch strap 10 near the user's wrist 2000. The airbag 22 can be located on the surface of the watch strap 10 facing the user's wrist 2000. Of course, the airbag 22 can also be located inside the watch strap 10 and on the side of the watch strap 10 near the user's wrist 2000. Figures 11 to 14 The airbag 22 shown is disposed on the surface of the watch strap 10 facing the user's wrist 2000.

[0198] The airbag 22 can be designed in different shapes and sizes to fit various styles of watch straps 10. For example, the airbag 22 can be reasonably arranged for both narrow and wide watch straps 10. Moreover, the inflation degree of the airbag 22 can be precisely controlled by the gas delivery component 1, enabling adjustment of various tightness states from slight fit to tight fixation, meeting the needs of users in different scenarios.

[0199] This application also provides a wearable device 1000, including the strap tension adjustment device 200 in any of the above embodiments, or the strap tension adjustment device 200 includes the pneumatic adjustment device 20 in any of the above embodiments.

[0200] It should be noted that wearable device 1000 can be a smartwatch, bracelet, etc.

[0201] Since the strap tension adjustment device 200 and the pneumatic adjustment device 20 in any of the above embodiments can precisely adjust the tightness of the strap 10 and finely adjust the tightness of the strap 10, the wearable device 1000 including the strap tension adjustment device 200 or the pneumatic adjustment device 20 can meet the user's wearing needs in different scenarios.

[0202] Reference Figures 3 to 9 In some embodiments, the watch case 100 of the wearable device 1000 is provided with an opening 1001, the watch strap 10 is provided through the opening 1001, and the end of the watch strap 10 is provided inside the watch case 100. The end of the watch strap 10 located inside the watch case 100 is connected to the cylinder 21 of the watch strap tension adjustment device 200.

[0203] It should be noted that the opening 1001 can connect to the cavity inside the watch case 100 and penetrate through the side of the watch case 100. The cavity inside the watch case 100 can be used to arrange gas delivery components 1, etc.

[0204] An opening 1001 is provided on the side of the watch case 100. The end of the watch strap 10 can be inserted into the watch case 100 through the opening 1001. When used with the cylinder 21, the depth of the end of the watch strap 10 inserted into the watch case 100 can be adjusted. Increasing the depth of the end of the watch strap 10 inserted into the watch case 100 can tighten the watch strap 10, so that the wearable device 1000 can be worn tightly. Decreasing the depth of the end of the watch strap 10 inserted into the watch case can loosen the watch strap 10, so that the wearable device 1000 can be worn loosely.

[0205] In some embodiments, a second sealing ring (not shown in the figure) may be provided on the inner side of the opening 1001 of the watch case 100. The second sealing ring is clamped between the inner side of the opening 1001 and the watch strap 10, thereby reducing the entry of impurities such as sweat, sewage, and dust into the watch case 100.

[0206] Reference Figure 6 , Figure 10 and Figure 15 In some embodiments, the wearable device 1000 includes a controller 5 disposed inside the watch case 100 and connected to the pneumatic adjustment device 20; the controller 5 is used to control the pneumatic adjustment device 20 to loosen or tighten the watch strap 10.

[0207] It should be noted that the controller 5 and the pneumatic regulating device 20 can be connected by wires, such as wires.

[0208] It should be noted that in some embodiments, the watch case 100 may be equipped with a button connected to the controller 5. The user can press the button to send a command to the controller 5 to increase or decrease the gap between the watch strap 10 and the user's wrist 2000. In other embodiments, corresponding adjustment software can be installed in the wearable device 1000. The user can use the software to send a command to the controller 5 to increase or decrease the gap between the watch strap 10 and the user's wrist 2000. After receiving the command, the controller 5 controls the pneumatic adjustment device 20 to loosen or tighten the watch strap 10. In still other embodiments, the controller 5 can identify the current scene of the wearable device and then decide whether to loosen or tighten the watch strap 10 based on the current scene of the wearable device 1000.

[0209] For example, when controller 5 determines that the user is in a sports or health measurement scenario, controller 5 will tighten the watch strap 10. Figure 4 In the illustrated embodiment, the controller 5 can send a start command to the gas delivery component 1 and the reversing valve 34 to instruct the reversing valve 34 to open the gas delivery component 1 and the first gas pipe 41. The gas delivery component 1 can then inflate the first chamber 2011, thereby driving the cylinder 21 to tighten the watch strap 10, achieving the purpose of adjusting the watch strap 10. Figure 8 In the illustrated embodiment, the controller 5 can send a start command to the gas delivery component 1 to instruct the gas delivery component 1 to inflate the first chamber 2011, thereby driving the cylinder 21 to tighten the watch strap 10. Figure 13 In the illustrated embodiment, the controller 5 can send a start command to the gas delivery component 1 to instruct the gas delivery component 1 to inflate the gas chamber 201 of the airbag 22, thereby causing the airbag 22 to expand and achieve the purpose of tightening the watch strap 10.

[0210] For example, when controller 5 determines that the user has ended exercise or health measurement, controller 5 can determine to loosen the watch strap 10. For example... Figure 5 In the illustrated embodiment, the controller 5 can issue a start command to the gas delivery component 1 and the reversing valve 34, instructing the reversing valve 34 to open the gas delivery component 1 and the second gas pipe 42. The gas delivery component 1 can then inflate the second chamber 2012, thereby causing the cylinder 21 to drive the watch strap 10 to extend from the watch case 100, achieving the purpose of loosening the watch strap 10. Figure 9 In the illustrated embodiment, the controller 5 can issue a command to the first exhaust valve 31 to instruct the first exhaust valve 31 to open so that the first chamber 2011 can be vented, thereby causing the cylinder 21 to drive the watch strap 10 to extend from the watch case 100, achieving the purpose of loosening the watch strap 10. Figure 14In the illustrated embodiment, the controller 5 can send a start command to the second exhaust valve 32 to instruct the second exhaust valve 32 to open so that the gas chamber 201 of the airbag 22 is vented, thereby causing the airbag 22 to contract and achieve the purpose of loosening the watch strap 10.

[0211] It should be noted that exercise scenarios can include running, swimming, diving, cycling, mountain climbing, or yoga; health measurement scenarios can include measurements such as body temperature, blood pressure, heart rate, blood oxygen saturation, sleep, and respiratory rate.

[0212] It is understood that the description of how the controller 5 identifies specific scenarios can be found in the prior art, and the embodiments of this application do not limit this.

[0213] The controller 5 can precisely control the inflation volume of the gas delivery component 1 and the opening duration of the first exhaust valve 31 through a preset program, so that the adjustment range of the strap 10 can be quantified and repeated.

[0214] For cylinder 21, controller 5 can precisely control the amount of air supplied to the first chamber 2011 or the second chamber 2012 according to the instruction, so that piston rod 212 drives the end of watch strap 10 to move a specific distance, so that the tightness of watch strap 10 meets the user's needs and improves the stability of wearing experience.

[0215] For the airbag 22, the controller 5 can precisely control the inflation amount to achieve the preset inflation degree of the airbag 22, so that the tightness of the strap 10 meets the user's needs and improves the stability of the wearing experience.

[0216] Continue to refer to Figure 6 , Figure 10 and Figure 15 The wearable device 1000 can also be equipped with a differential pressure gauge 6, which can be connected to the gas delivery component 1 and electrically connected to the controller 5.

[0217] It should be noted that the differential pressure gauge 6 is an instrument used to measure the pressure difference between two points. Its core function is to provide data reference for the system's operating status by sensing the pressure difference at different locations.

[0218] In this embodiment, the differential pressure gauge 6 can detect the pressure in the gas delivery component 1 and the corresponding gas pipe, and feed the pressure information back to the controller 5. The controller 5 can determine the current state based on the information fed back by the differential pressure gauge 6. For example, for Figures 3 to 5As shown, when the controller 5 controls the gas delivery component 1 to fill the cylinder 21, the differential pressure gauge 6 can detect the pressure in the gas delivery component 1, the first air pipe 41, and the second air pipe 42, thereby determining whether the gas is delivered to the first chamber 2011 or the second chamber 2012, and feeding the detected information back to the controller 5. Figure 11 and Figure 12 The airbag 22 shown has a differential pressure gauge 6 that can detect the pressure difference between the gas chamber 201 of the airbag 22 and the external environment, and feed the detected information back to the controller 5 to determine the current state of the airbag 22.

[0219] The controller 5 can determine whether there is a fault or leak in the gas circuit based on this information. For example, when the controller 5 controls the gas delivery component 1 to fill the first chamber 2011 of the cylinder 21 with gas, if the differential pressure gauge 6 detects that the pressure in the first air pipe 41 increases and is greater than the pressure in the second air pipe 42, and feeds this information back to the controller 5, the controller 5 can determine that there is no fault or leak in the gas circuit based on the above information. When the controller 5 controls the gas delivery component 1 to fill the first chamber 2011 of the cylinder 21 with gas, if the differential pressure gauge 6 detects that the pressure in the first air pipe 41 remains unchanged while the pressure in the second air pipe increases, and feeds this information back to the controller 5, the controller 5 can determine that there may be a fault in the gas circuit based on the above information. When the controller 5 controls the gas delivery component 1 to fill the first chamber 2011 of the cylinder 21 with gas, if the differential pressure gauge 6 detects that the pressure in the first air pipe 41 remains unchanged and the pressure in the second air pipe 42 also remains unchanged, and feeds this information back to the controller 5, the controller 5 can determine that there may be a leak in the gas circuit based on the above information.

[0220] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pneumatic regulating device, characterized in that, For wearable devices with a watch strap, the pneumatic adjustment device includes: A pneumatic assembly having a gas cavity; A gas delivery device is installed inside the housing of the wearable device, the gas delivery device is in communication with the gas cavity, and the gas delivery device is used at least to fill the gas cavity with gas and / or to discharge the gas cavity; When the air pressure in the gas chamber changes, the pneumatic component is used to increase or decrease the gap between the watch strap and the user's wrist.

2. The pneumatic regulating device according to claim 1, characterized in that, The pneumatic component is connected to the end of the watch strap; When the gas delivery component fills the gas cavity with gas, the pneumatic component is used to drive the watch strap to move toward the inside of the watch case, or to drive the watch strap to move toward the outside of the watch case; or, When the gas delivery component fills the gas cavity with gas, the pneumatic component drives the watch strap to move toward the inside of the watch case; when the pneumatic component exhausts gas, the pneumatic component drives the watch strap to move toward the outside of the watch case.

3. The pneumatic regulating device according to claim 2, characterized in that, The pneumatic component includes a cylinder installed inside the watch case. The cylinder includes a cylinder body and a piston rod. One of the cylinder body and the piston rod is connected to the watch case, and the other of the cylinder body and the piston rod is connected to the end of the watch strap. The cylinder body and the piston rod can move relative to each other to drive the watch strap to move relative to the watch case. The cylinder body is provided with the gas chamber, which is divided into a first chamber and a second chamber by the piston part of the piston rod; The gas delivery device is connected to the first chamber and the second chamber; the gas delivery device is used to fill gas into or discharge gas from either the first chamber or the second chamber, so that a pressure difference is formed on both sides of the piston portion; When the pressure on the piston portion facing the first chamber is greater than the pressure on the piston portion facing the second chamber, the piston rod drives the watch strap to move inward relative to the watch case; When the pressure on the piston portion facing the first chamber is less than the pressure on the piston portion facing the second chamber, the piston rod drives the watch strap to move outward relative to the watch case.

4. The pneumatic regulating device according to claim 3, characterized in that, The pneumatic regulating device also includes a reversing valve, a first air pipe, a second air pipe, and a third air pipe; The first connection port of the reversing valve is connected to the first chamber through the first air pipe; The second connection port of the reversing valve is connected to the second chamber through the second air pipe; The third connection port of the reversing valve is connected to the gas delivery component through the third air pipe; The reversing valve is used to switch the gas flow path so that the gas enters the first chamber through the first air pipe or enters the second chamber through the second air pipe.

5. The pneumatic regulating device according to claim 3, characterized in that, The cylinder also includes an elastic element disposed in the first chamber and / or the second chamber. The elastic element is connected to the piston rod. During the process of the gas delivery component filling the first chamber with gas, the piston rod overcomes the elastic force of the elastic element and drives the watch strap to move toward the inside of the watch case. When the first chamber is vented and / or the gas delivery member is inflated into the second chamber, the elastic member causes the watch strap to move outward from the watch case.

6. The pneumatic regulating device according to any one of claims 3-5, characterized in that, The pneumatic regulating device further includes a first exhaust valve connected to the first chamber. When the first exhaust valve is open, the first chamber exhausts gas. When the gas conveying component fills the first chamber with gas, the first exhaust valve is closed. Alternatively, the gas delivery device includes a first bidirectional pump that, in an inflation mode, inflates the first chamber and, in a evacuation mode, evacuates the first chamber.

7. The pneumatic regulating device according to any one of claims 3-5, characterized in that, A first sealing ring is provided on the outer periphery of the piston portion, and the first sealing ring is clamped between the inner side surface of the piston portion and the cylinder body.

8. The pneumatic regulating device according to any one of claims 1-5, characterized in that, The pneumatic component includes an airbag disposed on the side of the watch case and / or the watch strap near the user's wrist. The airbag also has a vent hole communicating with the gas cavity. The gas delivery component communicates with the gas cavity through the vent hole. When the gas delivery device fills the gas cavity with gas, the airbag is inflated. When the airbag is inflated, the gap between the watch strap and the user's wrist is smaller than the gap between the watch strap and the user's wrist when the airbag is deflated.

9. The pneumatic regulating device according to claim 8, characterized in that, The airbag is provided with a second exhaust valve that communicates with the gas cavity. When the second exhaust valve is open, the gas cavity is vented. When the gas delivery component inflates the gas cavity, the second exhaust valve is closed. or, The gas delivery device includes a second bidirectional pump, which inflates the gas cavity in an inflation mode and evacuates the gas cavity in an evacuation mode.

10. A watch strap tension adjustment device, applied to wearable devices, characterized in that, The strap tension adjustment device includes a strap and a pneumatic adjustment device as described in any one of claims 1-9, wherein the gas delivery component of the pneumatic adjustment device is installed inside the watch case of the wearable device, and the pneumatic component of the pneumatic adjustment device is connected to the strap.

11. The watch strap tension adjustment device according to claim 10, characterized in that, The pneumatic component includes a cylinder connected to the end of the watch strap. When the cylinder body and piston rod move relative to each other, the end of the watch strap can move relative to the watch case.

12. The watch strap tension adjustment device according to claim 10 or 11, characterized in that, The pneumatic component includes an airbag positioned on the side of the watchband closest to the user's wrist.

13. A wearable device, characterized in that, The wearable device includes a strap tension adjustment device as described in any one of claims 10-12, or the wearable device includes a pneumatic adjustment device as described in any one of claims 1-9.

14. The wearable device according to claim 13, characterized in that, The wearable device has an opening in its casing, through which a strap is inserted, with one end of the strap inside the casing. The end of the strap is connected to a cylinder of the strap tension adjustment device.

15. The wearable device according to claim 13 or 14, characterized in that, The wearable device includes a controller, which is connected to the pneumatic adjustment device; The controller is used to control the pneumatic adjustment device to loosen and / or tighten the watch strap.

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