Breathing guidance device

Abstract

The application discloses a breathing guiding device, and relates to the technical field of medical instruments. The device comprises at least two wearing parts which are respectively worn on the chest and the abdomen of a user; each wearing part comprises a shell, a rotating part, a bandage, a first elastic part, a moving part and a control unit; the bandage is drivingly connected with the rotating part, can be pulled out and automatically retracted after being unlocked; the moving part prevents the rotating part from rotating to lock the bandage when being in a first position, and releases the rotating part to allow the bandage to freely stretch and shrink when being in a second position; the control unit controls the device to switch between a first mode and a second mode: in the first mode, at least one moving part is locked, so that the length of the bandage of the corresponding wearing part is fixed, thereby physically limiting the movement of the chest or the abdomen; in the second mode, all the moving parts are released. The application can selectively apply physical constraints and forcibly guide the user to master correct breathing modes.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a breathing guidance device for guiding a patient's breathing before radiotherapy. Background Technology

[0002] During radiotherapy, thoracic and abdominal tumors can shift position due to the patient's breathing, affecting irradiation accuracy. To mitigate this issue, respiratory gating technology is widely used clinically. This involves monitoring the patient's respiratory status and delivering the beam at specific respiratory phases (such as deep inspiration and breath-holding) to keep the tumor relatively still, thereby reducing the irradiation area and minimizing the dose to normal tissues. The patient's ability to stably maintain the target respiratory state is crucial for the successful implementation of respiratory gating technology; therefore, respiratory training before radiotherapy is particularly important.

[0003] Currently, hospitals typically use respiratory gating devices or stand-alone breathing training equipment to train patients. These devices demonstrate the required breathing rhythm and amplitude through voice prompts or on-screen animations. However, for some patients, especially those new to breathing training, relying solely on visual or auditory guidance makes it difficult to accurately master the correct breathing techniques. For example, when patients are instructed to practice diaphragmatic breathing, they may unconsciously use thoracic breathing, and existing equipment struggles to effectively help them distinguish and perceive the differences between different breathing methods, resulting in unsatisfactory training outcomes.

[0004] Therefore, there is an urgent need for a training device that can help patients learn and master the correct breathing method more effectively. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a breathing guidance device that can selectively apply physical constraints to different body parts, thereby flexibly and efficiently assisting patients in performing different types of breathing training.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a breathing guidance device includes at least two wearable components, one for wearing on the chest and one on the abdomen of a user; said wearable component includes:

[0008] case;

[0009] A rotating component is rotatably mounted within the housing;

[0010] A strap is driven to the rotating component, and one end of the strap can be pulled out of the housing and detachably connected to the housing.

[0011] A first elastic element, connected to the rotating element, is used to provide a restoring force to the rotating element so that the strap retracts into the housing;

[0012] A moving component is disposed opposite to the rotating component, and the moving component is movable between a first position and a second position. In the first position, the moving component prevents the rotating component from rotating, and in the second position, the moving component allows the rotating component to rotate.

[0013] The control unit is communicatively connected to each of the moving parts and is used to control the breathing guidance device to switch between at least a first mode and a second mode; in the first mode, at least one of the moving parts is in the first position to restrict the breathing movement of the corresponding part; in the second mode, all the moving parts are in the second position.

[0014] Optionally, it also includes a sensor and a feedback element; the sensor is connected to the rotating component for detecting the amount of rotation of the rotating component and generating sensing information; the control unit controls the feedback element to provide breathing feedback to the user based on the sensing information.

[0015] Optionally, it further includes a gear transmission assembly, which includes at least two meshing gears; the rotating component is provided with a first gear, and the sensor is provided with a second gear, the first gear meshing with the input end of the gear transmission assembly, and the second gear meshing with the output end of the gear transmission assembly.

[0016] Optionally, when the moving member is in the first position, at least a portion of the moving member is located within the tooth groove of the gear in the gear transmission assembly that is disposed opposite to the moving member.

[0017] Optionally, the moving component includes a push-pull electromagnet, a locking element, and a second elastic element. The locking element is fixedly connected to the moving iron core of the push-pull electromagnet, and the second elastic element is connected to the locking element. When the push-pull electromagnet is energized, the locking element is located in the first position, and at least a portion of the locking element is located in the tooth groove of the gear opposite to the moving component in the gear transmission assembly. When the push-pull electromagnet is de-energized, the locking element is located in the second position and disengaged from the tooth groove.

[0018] Optionally, the strap is detachably connected to the rotating component.

[0019] Optionally, the rotating component includes a first rotating shaft and two second rotating shafts. The strap is wrapped around the first rotating shaft, and the two second rotating shafts are located at both ends of the first rotating shaft and are coaxially arranged with the first rotating shaft, and are circumferentially fixedly connected in a detachable manner.

[0020] Optionally, the ends of the first rotating shaft and the second rotating shaft opposite to each other are connected and circumferentially fixed by a profile fitting structure.

[0021] Optionally, the end of the second rotating shaft is formed with a flange, the flange having a first limiting surface extending radially outward along the second rotating shaft;

[0022] The second rotating shaft is also fitted with a baffle and a third elastic element. The baffle can slide along the axial direction of the second rotating shaft. The third elastic element abuts between the second rotating shaft and the baffle and is used to apply a thrust toward the first limiting surface to the baffle so that the baffle abuts against the first limiting surface.

[0023] When the baffle abuts against the first limiting surface, the baffle, the flange, and the second rotating shaft together define a receiving space. The end of the first rotating shaft is located within the receiving space and is restricted from axial movement and circumferential rotation relative to the second rotating shaft.

[0024] Optionally, it also includes a pressure block, which is detachably disposed at the end of the second rotating shaft, and the pressure block has a first limiting surface extending radially outward along the second rotating shaft;

[0025] The second rotating shaft is also fitted with a baffle and a third elastic element. The baffle can slide along the axial direction of the second rotating shaft. The third elastic element abuts between the second rotating shaft and the baffle and is used to apply a thrust toward the first limiting surface to the baffle so that the baffle abuts against the first limiting surface.

[0026] When the baffle abuts against the first limiting surface, the inner side of the baffle, the outer peripheral surface of the pressure block, and the outer peripheral surface of the second rotating shaft together define a receiving space. The end of the first rotating shaft is located within the receiving space and is restricted from axial movement and circumferential rotation relative to the second rotating shaft.

[0027] Optionally, the first elastic element includes a spiral spring, the inner ring of which is connected to the rotating element, and the outer ring of which is connected to the housing.

[0028] Optionally, the extended end of the strap is provided with a strap head, and the strap head is provided with a groove; the housing is provided with a releasable locking structure, which engages with the groove to releasably lock the strap head onto the housing.

[0029] Optionally, the feedback element includes a display screen and / or a speaker.

[0030] Optionally, the device also includes a bracket comprising a fixing member and a support member, the fixing member being detachably connected to the display screen, and the support member being used to support the fixing member and hold the display screen in a position for the user to view.

[0031] Optionally, the system also includes a remote control, which is wirelessly connected to the control unit and is used to allow the user to switch modes.

[0032] Secondly, the application of the aforementioned breathing guidance device in breathing training before radiotherapy.

[0033] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0034] 1. This application allows for flexible switching between a first mode and a second mode via a control unit. In the first mode, the moving parts in the chest or abdomen wearing device can be selectively locked, physically restricting respiratory movements in the corresponding areas and forcibly guiding the user to adopt the target breathing method for training. Compared to existing technologies that rely solely on voice or visual prompts, this application allows users to personally experience the difference between correct and incorrect breathing methods under physical constraints, resulting in a more significant and efficient training effect.

[0035] 2. Each module of this device has a built-in rechargeable battery, so it does not need to be fixed in a specific location in the hospital. Patients can perform breathing training in any safe, flat area, without being restricted by location, which improves the convenience of use and training compliance.

[0036] 3. The strap and rotating component are detachably connected. The rotating component can adopt a segmented assembly structure, allowing the strap and the first rotating shaft to be replaced as a whole consumable module. When different patients use the same device, only the strap module needs to be replaced, making the operation simple and quick, effectively avoiding cross-infection caused by the reuse of straps, and reducing usage costs.

[0037] 4. The remote control features a simplified button layout, requiring only three buttons for all operations. These buttons are distinguished by shape, size, or surface texture, allowing users to operate the device by touch while lying down, making it particularly suitable for radiotherapy patients with limited mobility. An adjustable stand is also included to ensure the user gets the best viewing angle.

[0038] 5. By collecting breathing signals in real time through sensors, feedback devices provide real-time feedback to users in various ways such as graphics, text, color, and voice, clearly indicating whether the current breathing training is successful and what aspects need improvement, avoiding blind or even incorrect ineffective training, and effectively shortening the training cycle.

[0039] 6. The control unit can simultaneously collect respiratory signals from both the chest and abdomen. By comparing the amplitude and phase relationship of the two signals, it can automatically determine whether the user's current breathing mode is abdominal or chest breathing, providing a basis for automatic selection of training modes and evaluation of training effects.

[0040] 7. It offers three training modes: standard mode, preset mode, and auxiliary mode, to meet the needs of different patients at different training stages. The standard mode allows patients to set and change baselines themselves, offering high flexibility; the preset mode allows medical staff to set professional baselines, ensuring uniformity; and the auxiliary mode uses physical locking to forcibly guide the correct breathing method, providing high specificity.

[0041] 8. The control unit records the user's training data. When the number of training sessions and the pass rate reach a preset threshold for several consecutive days, it automatically sends a reminder to inform the user that they can go to the hospital for radiotherapy. This allows patients to understand whether their training progress meets the clinical treatment requirements without relying on medical staff, thus avoiding treatment delays caused by information asymmetry.

[0042] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the breathing guidance device in the embodiments of this application;

[0045] Figure 2 This is a schematic diagram of the internal structure of the breathing guidance device in the embodiments of this application;

[0046] Figure 3 This is a schematic diagram of the assembly of the first rotating shaft and the second rotating shaft in an embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the moving parts in the embodiments of this application;

[0048] Figure 5 This is a schematic diagram of the breathing guidance device in use in the embodiments of this application.

[0049] Reference numerals: 101. Wearing component; 1. Housing; 11. Body; 12. First cover plate; 13. Second cover plate; 14. Power switch; 15. Charging port; 16. Unlocking component; 17. Engaging groove; 18. Hemispherical male head; 2. Rotating component; 21. First rotating shaft; 22. Second rotating shaft; 23. Baffle; 24. Pressure block; 241. Filling part; 242. Ring part; 25. Third elastic component; 26. First gear; 27. Second gear; 28. Gear transmission assembly; 3. Strap; 31. Strap head; 4. First elastic component; 5. Moving component; 51. Locking component; 52. Second elastic component; 6. Data acquisition drive module; 7. Bracket; 8. Display screen; 9. Remote control; 10. Sensor. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example: See Figure 1 , 5 As shown, this embodiment provides a breathing guidance device, which is particularly suitable for training patients to breathe before radiotherapy. It uses mandatory physical constraints to guide the user to master correct abdominal or thoracic breathing, helping the patient establish and stabilize the breathing rhythm and pattern required for treatment. The breathing guidance device includes at least two wearable components 101 and a control unit wirelessly connected to the wearable components 101. Each wearable component 101 is worn on at least one person on the user's chest and at least one person on their abdomen. The following description uses a case with two wearable components 101 as an example; it is understood that the number of wearable components 101 can be more depending on actual needs. The two wearable components 101 can be structurally identical, distinguished only by their wearing position as a first wearable component and a second wearable component. The first wearable component is worn on the user's chest, and the second wearable component is worn on the user's abdomen.

[0052] See Figure 2As shown, each wearable component 101 includes a housing 1, a rotating component 2, a strap 3, a first elastic element 4, a moving component 5, and a data acquisition and driving module 6. The rotating component 2 is rotatably mounted inside the housing 1. The strap 3 is drivenly connected to the rotating component 2, and one end of the strap 3 can be pulled out of the housing 1 and detachably connected to the housing 1. The first elastic element 4 is connected to the rotating component 2 and is used to provide a restoring force to the rotating component 2 so that the strap 3 retracts into the housing 1. The moving component 5 is disposed opposite to the rotating component 2 and is movable between a first position and a second position. In the first position, the moving component 5 prevents the rotating component 2 from rotating, and in the second position, the moving component 5 allows the rotating component 2 to rotate. The control unit is wirelessly connected to each of the moving components 5 and the sensor 10, respectively, for receiving the respiratory sensing information and controlling the breathing guidance device to switch between at least a first mode and a second mode. In the first mode, at least one of the moving components 5 is in the first position to restrict respiratory movement of the corresponding part; in the second mode, all of the moving components 5 are in the second position.

[0053] In an optional embodiment, the interior of the housing 1 forms an installation space for accommodating the rotating component 2, the first elastic component 4, the moving component 5, the acquisition drive module, and other internal components. The housing 1 can be a cuboid or a rounded cuboid, composed of a body 11 and a cover plate. The cover plate includes a first cover plate 12 and a second cover plate 13, which are connected by a hinge. The second cover plate 13 can be flipped open relative to the first cover plate 12 around the hinge to facilitate the installation, maintenance, or replacement of the components within the housing 1. Both the first cover plate 12 and the second cover plate 13 are provided with male buckles, and the corresponding position on the body 11 is provided with female buckles. The detachable connection between the cover plate and the body 11 is achieved through the engagement of the male and female buckles. The body 11 has an outlet for pulling out the strap 3, the shape of which matches the cross-sectional shape of the strap 3. The body 11 also has a releasable locking structure for detachably locking with the strap head 31 at the protruding end of the strap 3. The main body 11 is also equipped with a power switch 14, a charging port 15, and an unlocking component 16. The power switch 14 is used to control the power supply to and from the wearable device 101. The charging port 15 is electrically connected to the internal data acquisition and driving module 6, and is used to charge the rechargeable battery built into the wearable device 101 through the data acquisition and driving module 6. The unlocking component 16 is used to release the locking structure from locking the strap head 31. The power switch 14 integrates an indicator light to indicate the working status and charging status of the wearable device 101.

[0054] In an optional embodiment, the strap 3 is made of non-stretchable flexible webbing, such as polyester fiber flat webbing, to ensure that the length of the strap 3 remains essentially unchanged when subjected to the pulling force generated by the user's breathing, thereby accurately converting changes in the user's chest or abdominal circumference into changes in the length of the strap 3 extending out of the shell 1. The strap 3 has a first end and a second end. The first end of the strap 3 is wrapped around and fixed to the rotating member 2, and the second end of the strap 3 is a free end that can be pulled out from the outlet of the body 11 to the outside of the shell 1. The portion of the strap 3 wrapped around the rotating member 2 forms a strap roll. When the second end of the strap 3 is pulled outward, the strap roll gradually unfolds and drives the rotating member 2 to rotate around its own axis in a first direction. When the first elastic member 4 drives the rotating member 2 to rotate around its own axis in a second direction opposite to the first direction, the strap 3 is rewound around the rotating member 2, and the strap roll gradually increases in size.

[0055] In an optional embodiment, the second end of the strap 3 is provided with a strap head 31, which is fixedly connected to the strap 3. The width of the strap head 31 is greater than the width of the strap 3, and the size of the strap head 31 is greater than the size of the outlet of the body 11, to prevent the second end of the strap 3 from being completely pulled into the housing 1 under the retraction force of the first elastic member 4. A groove is provided on the strap head 31, which is used to cooperate with the engaging structure on the body 11. In a specific embodiment, the groove on the strap head 31 is a hemispherical groove, and the engaging structure is a hemispherical male head 18, which is driven by a spring force. When the user pulls the second end of the strap 3 to the desired length, the strap head 31 is inserted into the corresponding engaging groove 17 on the body 11. The hemispherical male head 18, under the action of a spring, engages in the hemispherical groove of the strap head 31, achieving a releasable lock between the strap 3 and the housing 1. At this time, the wearing piece 101 is reliably wrapped and fixed around the user's chest or abdomen. When it is necessary to unlock, the user presses the unlocking member 16. The unlocking member 16 drives the hemispherical male head 18 to retract against the spring force, causing the hemispherical male head 18 to disengage from the hemispherical groove. The engaging structure is released, and the strap 3 automatically retracts into the housing 1 under the action of the first elastic member 4.

[0056] In an optional embodiment, the rotating component 2 is a single molded part, i.e., the rotating component 2 is a single integral rotating shaft. This rotating shaft has a substantially uniform cross-sectional shape along its axial direction, such as a cylinder, and is rotatably mounted within the housing 1 via bearings or bushings. Optionally, the rotating shaft is provided with a limiting structure for restricting the winding position of the strap 3. The limiting structure may include two limiting plates spaced apart along the axial direction of the rotating shaft, and the limiting plates may be annular plates. The area between the two limiting plates constitutes a winding area for the strap 3 to be wound. The first end of the strap 3 is wound within the winding area, and the strap 3 is constrained between the two limiting plates during winding to prevent the strap 3 from shifting axially along the rotating shaft during winding or unwinding, ensuring that the strap 3 can be neatly overlapped and wound, reducing the risk of jamming.

[0057] In an optional embodiment, the strap 3 and the rotating component 2 can be detachably connected. The purpose of this detachable connection is to allow the strap 3 to be easily removed from the rotating component 2 for replacement when the wearable device 101 is used by different users, thereby avoiding cross-infection caused by repeated use of the strap 3 and facilitating cleaning or disinfection of the strap 3. Specifically, the first end of the strap 3 is detachably connected to the rotating shaft. For example, a slot is provided on the rotating shaft, and a connector is fixed to the first end of the strap 3. The connector can be inserted into the slot and circumferentially fixed by a buckle or top screw; or the first end of the strap 3 can be directly fixed to the surface of the rotating shaft using Velcro, snaps, or other methods. When the strap 3 needs to be replaced, simply disconnect the connection between the first end of the strap 3 and the rotating shaft, remove the old strap from the rotating shaft, and then fix the first end of the new strap to the rotating shaft; there is no need to replace the entire rotating component 2.

[0058] In another alternative implementation, see Figure 3 As shown, the rotating component 2 adopts a segmented assembly structure, meaning that the rotating component 2 is not composed of a single rotating shaft, but rather of multiple independent shaft segments assembled axially. Specifically, the rotating component 2 includes a first rotating shaft 21 and two second rotating shafts 22. The strap 3 is wrapped around the first rotating shaft 21, and the two second rotating shafts 22 are located at both ends of the first rotating shaft 21, and are coaxially arranged with the first rotating shaft 21. The two second rotating shafts 22 are detachably and circumferentially fixedly connected to the corresponding ends of the first rotating shaft 21, allowing the first rotating shaft 21 to rotate synchronously with the two second rotating shafts 22, while also allowing the first rotating shaft 21 to be easily detached from the two second rotating shafts 22.

[0059] When the strap 3 needs to be replaced, the operator does not need to disassemble the second rotating shaft 22 connected to the first elastic element 4 or the gear transmission assembly 28. Instead, the first rotating shaft 21, along with the strap 3 wrapped around it, is simply removed as a single module from between the two second rotating shafts 22, and then replaced with a first rotating shaft 21 pre-wound with a new strap. Throughout the replacement process, the connection between the second rotating shaft 22 and other transmission components within the housing 1 remains unchanged, greatly simplifying the strap replacement operation and reducing the risk of decreased precision in the transmission components due to frequent disassembly and reassembly. In clinical radiotherapy settings, different patients use the same main unit of the device; only the strap 3 and the first rotating shaft 21 module, which are consumables, need to be replaced. This effectively prevents cross-infection and reduces usage costs.

[0060] In an optional embodiment, the two second rotating shafts 22 are rotatably mounted within the housing 1 via bearings. Specifically, the housing 1 is provided with a support structure, which may be a support plate or support rod extending inward from the bottom or side wall of the housing 1. The support structure has mounting holes, in which bearings are fixedly mounted. The second rotating shaft 22 passes through the inner ring of the bearing and is fixedly connected to the inner ring of the bearing by means of set screws, snap rings, or tight fits, thereby allowing the second rotating shaft 22 to rotate freely relative to the housing 1 about its own axis. The two second rotating shafts 22 are respectively supported by the corresponding support structure and the bearing, so that the first rotating shaft 21 and the strap 3 wrapped around it can be stably suspended between the two second rotating shafts 22.

[0061] By using bearing support, the frictional resistance of the second rotating shaft 22 during rotation can be effectively reduced, ensuring smooth pulling and retraction of the strap 3. At the same time, it can also ensure precise cooperation between the second rotating shaft 22 and other transmission components (such as the first elastic element 4, gear transmission assembly 28, etc.) in the housing 1, thereby improving transmission efficiency and service life.

[0062] In an optional embodiment, the first rotating shaft 21 is a cylindrical shaft, with its middle section serving as a wrapping area for the strap 3 to be wound around, and the first end of the strap 3 fixed within the wrapping area. Optionally, to achieve a detachable circumferential fixed connection between the first rotating shaft 21 and the second rotating shaft 22, the opposite ends of the first rotating shaft 21 and each of the second rotating shafts 22 are inserted into each other via a profile fitting structure to achieve circumferential fixation. The profile fitting structure can be a combination of a semi-cylindrical protrusion and a semi-cylindrical groove, or a combination of a polygonal cross-section shaft and a corresponding polygonal hole, as long as it can transmit rotational torque circumferentially and the end of the first rotating shaft 21 can be removed or inserted radially.

[0063] In an optional embodiment, to achieve a detachable connection between the first rotating shaft 21 and the second rotating shaft 22 for easy replacement of the strap 3, a baffle 23 and a third elastic element 25 are also fitted onto the second rotating shaft 22. The baffle 23 is an annular plate with a through hole in its center for the second rotating shaft 22 to pass through. The baffle 23 can slide along the axial direction of the second rotating shaft 22. The radial dimension of the baffle 23 is larger than the width of the strap 3, so that when the strap 3 is wrapped around the first rotating shaft 21, the baffle 23 can axially block the end face of the strap roll, preventing the strap 3 from shifting and unraveling towards the end of the first rotating shaft 21 during winding or unwinding, and ensuring that the strap 3 can be neatly overlapped and wrapped around the first rotating shaft 21.

[0064] An elastic element fixing seat is also fixed on the second rotating shaft 22. The elastic element fixing seat has a receiving cavity facing the baffle 23. The receiving cavity is used to receive the third elastic element 25 and to fix and limit the third elastic element 25. The third elastic element 25 is a compression spring. One end of the compression spring abuts against the bottom of the receiving cavity, and the other end abuts against the baffle 23, and is used to apply a thrust to the baffle 23 in the direction of the first rotating shaft 21.

[0065] In one specific embodiment, a flange is formed at the end of the second rotating shaft 22 near the end of the first rotating shaft 21. The flange includes a filling portion and an annular portion. The filling portion extends axially along the second rotating shaft 22, and its cross-sectional shape is a portion of the end cross-section of the second rotating shaft 22. That is, the filling portion occupies a portion of the cross-sectional space of the through hole of the baffle 23 at the end of the second rotating shaft 22, while the unoccupied remaining cross-sectional space is used to accommodate the end of the first rotating shaft 21. The annular portion extends radially outward from the outer peripheral surface of the filling portion along the second rotating shaft 22, and its outer diameter is approximately equal to or smaller than the outer diameter of the baffle 23. A first limiting surface is formed on the side of the annular portion facing away from the first rotating shaft 21. Under the thrust of the compression spring, the baffle 23 is pushed towards the flange, so that the side of the baffle 23 facing the first rotating shaft 21 abuts against the first limiting surface. At this time, the plane of the filling part, the end face of the second rotating shaft 22, and the inner wall of the through hole of the baffle 23 jointly define a limiting hole for the end of the first rotating shaft 21 to be inserted. The cross-sectional shape of the limiting hole is non-circular. The end of the first rotating shaft 21 is located in the limiting hole, thereby restricting the circumferential rotation of the first rotating shaft 21 relative to the second rotating shaft 22. The side of the baffle 23 facing the first rotating shaft 21, the outer peripheral surface of the annular portion, and the outer peripheral surface of the second rotating shaft 22 jointly define a receiving space. The receiving space is an annular recessed area surrounding the end of the second rotating shaft 22. The end of the first rotating shaft 21 is located in the receiving space and is constrained axially by the end face of the second rotating shaft 22 and the corresponding structure of the other end of the second rotating shaft 22, thus preventing axial movement.

[0066] In another alternative embodiment, the end of the second rotating shaft 22 near the first rotating shaft 21 does not employ an integrally formed flange, but instead uses a detachable pressure block 24 to achieve the same function. The pressure block 24 is detachably fixed to the end of the second rotating shaft 22 by fasteners, such as screws, bolts, or clips. The pressure block 24 includes a filling portion 241 and an annular portion 242. Similar to the integrally formed flange design, under the thrust of the compression spring, the baffle 23 is pushed against the pressure block 24, causing the side of the baffle 23 facing the first rotating shaft 21 to abut against the first limiting surface. At this time, the plane of the filling part 241, the end face of the second rotating shaft 22 and the inner wall surface of the through hole of the baffle 23 also define the limiting hole to restrict the circumferential rotation of the first rotating shaft 21; the side of the baffle 23 facing the first rotating shaft 21, the outer peripheral surface of the ring part 242 and the outer peripheral surface of the second rotating shaft 22 also define the receiving space to restrict the axial movement of the first rotating shaft 21.

[0067] Compared to the one-piece flange method, the main difference between using a detachable pressure block 24 and the method using a detachable pressure block 24 is that the pressure block 24 is installed as an independent part on the end of the second rotating shaft 22 by fasteners. When the pressure block 24 wears out or is accidentally damaged during long-term use, it can be replaced separately without replacing the entire second rotating shaft 22, resulting in lower maintenance costs. Furthermore, when installing the first rotating shaft 21, the operator can choose to first remove the pressure block 24, place the end of the first rotating shaft 21 into the through hole of the baffle 23, and then install the pressure block 24. The radial constraint on the end of the first rotating shaft 21 is achieved through the cooperation of the first limiting surface of the pressure block 24 and the baffle 23. This installation sequence is more convenient in certain situations.

[0068] Whether using an integrally formed flange or a detachable pressure block 24, the disassembly and installation process of the first rotating shaft 21 is roughly the same. When it is necessary to disassemble the first rotating shaft 21 to replace the strap 3, the operator pushes the baffle 23 away from the first rotating shaft 21, causing the baffle 23 to move axially against the thrust of the compression spring. The baffle 23 separates from the first limiting surface until the through hole of the baffle 23 completely slides past the end of the first rotating shaft 21, completely exposing the end of the first rotating shaft 21 on one radial side. At this time, the end of the first rotating shaft 21 is no longer obstructed radially by the baffle 23, and the operator can then remove the end of the first rotating shaft 21 radially from the second rotating shaft 22, and then remove the first rotating shaft 21 together with the strap 3 wrapped around it. When a new first rotating shaft 21 needs to be installed, the baffle 23 is first pushed back axially, and the end of the first rotating shaft 21 is radially inserted into the conformal fitting structure of the second rotating shaft 22 and placed in the corresponding position of the receiving space. Then, the baffle 23 is released, and the baffle 23 returns to its original position under the thrust of the compression spring, re-abutting against the first limiting surface, thus constraining the end of the first rotating shaft 21 radially and reliably limiting the end of the first rotating shaft 21 within the receiving space. This structure allows the replacement of the strap 3 to be easily completed by ordinary users or medical personnel without the need for special tools.

[0069] In an optional embodiment, the first elastic element 4 is used to provide a restoring force to the rotating element 2 so that the strap 3 can automatically retract into the housing 1 after being unlocked, and maintain a certain retraction force during the process of the strap 3 being pulled out, so that the strap 3 can closely fit the surface of the user's chest or abdomen, thereby accurately following the circumference changes caused by breathing.

[0070] Specifically, the first elastic element 4 includes a spiral spring. The spiral spring is made of rolled steel strip, with its inner ring connected to the rotating element 2 and its outer ring connected to the housing 1. When the rotating element 2 adopts a segmented assembly structure, the inner ring of the spiral spring is fixedly connected to one end of one of the second rotating shafts 22 away from the first rotating shaft 21. For example, this end of the second rotating shaft 22 may have an axially extending slot, and the end of the inner ring of the spiral spring is bent to form a hook. This hook is inserted into the slot, achieving circumferential fixation between the inner ring of the spiral spring and the second rotating shaft 22. The end of the outer ring of the spiral spring is fixed to a corresponding fixing structure inside the housing 1, such as a slot or fixing post on the inner wall of the housing 1.

[0071] When the user pulls the strap 3 outward, the strap 3 drives the first rotating shaft 21 to rotate in a first direction. The first rotating shaft 21, through the surface-fitting structure, drives two second rotating shafts 22 to rotate synchronously. The second rotating shaft 22, connected to the spiral spring, drives the inner coil of the spiral spring to rotate synchronously, causing the spiral spring to gradually tighten and accumulate elastic potential energy. When the user releases the strap 3 from the housing 1, the spiral spring releases the accumulated elastic potential energy, driving the connected second rotating shaft 22 to rotate in a second direction opposite to the first direction. This, in turn, causes the strap 3 to automatically retract into the housing 1 via the first rotating shaft 21. During the process of pulling out the strap 3, the spiral spring constantly applies a retraction force opposite to the pulling direction to the rotating component 2, ensuring that the strap 3 remains taut during the user's breathing. This ensures that the strap 3 fits tightly against the user's body surface, accurately converting changes in chest or abdominal circumference caused by breathing into the expansion and contraction of the strap 3.

[0072] It is understood that the first elastic element 4 can also be other types of elastic elements, such as torsion springs, clock springs or elastic rubber bands, as long as they can provide the torque to reset the rotating element 2, and all of them are within the protection scope of this invention.

[0073] In an optional embodiment, the breathing guidance device further includes a sensor and a feedback element. The sensor is tractively connected to the rotating component 2 and is used to detect the amount of rotation of the rotating component 2 and generate sensing information. The sensor 10 transmits the sensing information to the local acquisition and driving module 6 of the wearable device, and then the acquisition and driving module 6 wirelessly transmits it to the external control unit. The control unit controls the feedback element to provide breathing feedback to the user based on the sensing information.

[0074] Specifically, the sensor includes a potentiometer and a sensor circuit board. The potentiometer is a variable resistor with a rotatable metal rod. When the metal rod rotates, the resistance value of the potentiometer changes accordingly. A second gear 27 is fixedly mounted on the metal rod of the potentiometer. The second gear 27 is fixed to the metal rod by a set screw, so that the second gear 27 can drive the metal rod to rotate synchronously. The sensor circuit board integrates an amplifier circuit and a filter circuit. The amplifier circuit is used to amplify the weak electrical signal generated by the change in the resistance value of the potentiometer to a signal strength suitable for subsequent processing; the filter circuit is used to filter out noise interference in the signal, improve the signal-to-noise ratio, and finally output an analog electrical signal that accurately reflects the rotation of the rotating component 2.

[0075] To transmit the rotation of the rotating member 2 to the sensor at a suitable speed ratio, the breathing guidance device further includes a gear transmission assembly 28. The gear transmission assembly 28 includes at least two meshing gears, each rotatably mounted within the housing 1 via its respective shaft. The rotating member 2 has a first gear 26, which meshes with the input gear of the gear transmission assembly 28, and the output gear of the gear transmission assembly 28 meshes with the second gear 27 on the sensor. In the case of a segmented assembly structure for the rotating member 2, the first gear 26 is located on the second shaft 22 that is not connected to the first elastic member 4. Specifically, a gear can be directly machined at the end of the second shaft 22 away from the first shaft 21, or an independent gear can be fixed at that end as the first gear 26 using a set screw. The number of teeth on each gear in the gear transmission assembly 28 is selected according to the required speed ratio so that the multiple rotations of the rotating member 2 can be converted into rotation angles within the detection range of the potentiometer, ensuring sufficient resolution and accuracy of the sensing signal. By setting the gear transmission assembly 28, the rotation of the rotating member 2 can be transmitted to the potentiometer at a predetermined speed ratio, so that the rotation of the rotating member 2 caused by the extension and retraction of the strap 3 is accurately converted into a change in the resistance value of the potentiometer.

[0076] In an optional implementation, see Figure 4As shown, the moving part 5 is used to prevent the rotating part 2 from rotating in the first position. The locking between the moving part 5 and the rotating part 2 can be indirectly achieved through the gear transmission assembly 28. Specifically, when the moving part 5 is in the first position, at least a portion of the moving part 5 is located in the tooth groove of the gear in the gear transmission assembly 28 that is opposite to the moving part 5. Since the gear and the rotating part 2 are connected by gear meshing, when the gear is jammed by the moving part 5 and cannot rotate, the entire gear transmission assembly 28 is locked, and the rotating part 2 is also locked and cannot rotate. The advantage of this indirect locking method is that the moving part 5 only needs to be engaged in the tooth groove of the gear to achieve locking, the required driving force is small, and the locking is reliable; at the same time, a gear with a smaller size and more teeth in the gear transmission assembly 28 can be selected as the locking object to improve the locking precision and response speed.

[0077] In one specific embodiment, the moving component 5 includes a push-pull electromagnet, a locking element 51, and a second elastic element 52. The push-pull electromagnet is fixedly installed inside the housing 1 and has a moving iron core capable of axial extension and retraction when energized and de-energized. The locking element 51 is fixedly connected to the moving iron core of the push-pull electromagnet. The locking element 51 can be a metal rod or a metal sheet, the shape of its end matching the tooth groove shape of the corresponding gear in the gear transmission assembly 28, so that it can smoothly engage in the tooth groove. The second elastic element 52 is connected to the locking element 51 and is used to apply a restoring force to the locking element 51 when the push-pull electromagnet is de-energized. The second elastic element 52 can be a helical spring or a spring sheet. When the push-pull electromagnet is energized, the moving iron core drives the locking member 51 to the first position, and the end of the locking member 51 engages in the tooth groove of the gear in the gear transmission assembly 28 that is opposite to the moving member 5, thereby locking it; when the push-pull electromagnet is de-energized, the elastic force of the second elastic member 52 causes the locking member 51 to return to the second position, and the end of the locking member 51 disengages from the tooth groove, thereby releasing the lock.

[0078] When the breathing guidance device is unexpectedly powered off, all the moving parts 5 will automatically return to the second position under the action of the second elastic element 52, and the user's chest and abdomen will be freed, so that the user will not suffer discomfort or injury due to continuous locking.

[0079] In an optional implementation, the control unit is disposed within a feedback element, for example, within the display screen 8. The control unit includes a main control circuit board. The main control circuit board integrates microcontroller circuitry, wireless communication circuitry, and power supply regulation circuitry.

[0080] Each wearable device 101 is equipped with a data acquisition drive module 6, which includes a local circuit board, an A / D conversion circuit, a wireless adapter circuit, a braking drive circuit, and a battery charging circuit.

[0081] The A / D conversion circuit is electrically connected to the output terminal of the sensor circuit board, and is used to receive the analog electrical signal output by the sensor circuit board and convert the analog electrical signal into a digital signal.

[0082] The wireless adapter circuit is connected to the A / D conversion circuit and is used to transmit the digital signal (i.e., the breathing sensor signal) to the control unit located in the external display screen 8 via a wireless network. Simultaneously, the wireless adapter circuit is also used to receive wireless braking commands sent from the control unit and transmit them to the braking drive circuit.

[0083] The braking drive circuit is electrically connected to the moving part 5, specifically to the push-pull electromagnet, and is used to control the energization or de-energization of the push-pull electromagnet in response to the braking command.

[0084] The battery charging circuit is electrically connected to the charging port 15 and is used to manage the charging and discharging process of the rechargeable battery inside the wearable device 101, including functions such as constant current charging, constant voltage charging, overcharge protection, and over-discharge protection. The wearable device 101 contains the rechargeable battery, such as a lithium battery, which is used to independently power the sensors, acquisition drive module 6, electromagnets, and other electrical components inside the wearable device 101.

[0085] The microcontroller circuit in the control unit receives multiple respiratory sensing signals from each wearable device via its wireless communication circuit, and processes and calculates the digital signals. Specifically, the microcontroller circuit extracts multiple respiratory waveform data from the digital signals, calculates parameters such as respiratory frequency and respiratory amplitude, and displays them on the display screen 8. The microcontroller circuit can also automatically determine the breathing mode by comparing the amplitude and phase relationship of the respiratory signals collected by the wearable device 101 worn on the chest and the wearable device 101 worn on the abdomen, to determine whether the user's current breathing mode is abdominal breathing or chest breathing. In addition, the microcontroller circuit is also responsible for evaluating the training effect by comparing and analyzing the real-time collected respiratory waveform with a preset reference waveform to determine whether the current breathing training is successful. When a lock or unlock decision is made, the microcontroller circuit sends control commands to the corresponding wearable device via the wireless communication circuit, and the local acquisition drive module 6 of each wearable device drives the movement of the moving part 5.

[0086] In an optional embodiment, the signal transmission and processing flow of the breathing guidance device is as follows: The user's breathing movements cause changes in the circumference of the chest and abdomen, which in turn causes the strap 3 to extend and retract, driving the rotating component 2 to rotate. The rotation of the rotating component 2 is transmitted to the potentiometer in the sensor 10 through the gear transmission assembly 28 at a predetermined speed ratio, causing a change in the resistance value of the potentiometer. The amplification circuit and the filtering circuit on the sensor circuit board convert the resistance value change into an analog electrical signal. This analog electrical signal is sent to the local circuit board, converted into a digital signal by the A / D conversion circuit, and then wirelessly transmitted to the control unit in the display screen 8 by the wireless transfer circuit. The microcontroller circuit of the control unit processes the digital signal, extracts breathing waveform data, calculates parameters such as breathing frequency and amplitude, and controls the display screen 8 to display feedback. When the control unit needs to send a braking command to a certain wearable component 5 according to the algorithm or user settings, it sends the command to the wearable component via wireless communication. After receiving the command, the wireless transfer circuit of the wearable component controls the braking drive circuit to supply power or de-energize the push-pull electromagnet, realizing the switching of the wearable component 5 between the first position and the second position.

[0087] In one alternative implementation, the feedback element includes at least one of a display screen 8 and a speaker. The feedback element may be integrated into a separate touch display assembly, in which the control unit is built.

[0088] The display screen 8 provides users with a visual operating interface and training feedback. The display screen 8 can display the user's breathing waveform in real time graphically, display training mode, training duration, pass rate, and other information in text format, and intuitively indicate training results using color changes (e.g., green for pass, red for fail). The display screen 8 can be a touch screen, allowing users to interact with modes, set parameters, etc., through touch operations.

[0089] The speaker is used to provide voice prompts to the user. When the user's breathing training is successful, the speaker can play encouraging voice prompts; when the user's breathing training is unsuccessful, the speaker can play corrective prompts, indicating the aspects that need improvement. The speaker can also play prompts at the beginning and end of the training.

[0090] In an optional embodiment, a metal sheet may be embedded in the back shell of the touch display component to facilitate magnetic connection with the bracket 7 described later.

[0091] In an optional embodiment, the breathing guidance device further includes a support 7. The support 7 supports the feedback element and holds it in a position easily visible to the user when lying down. The support 7 includes a fixing member and a supporting member.

[0092] The fixing member is used for detachable connection with the feedback member. In one specific embodiment, the fixing member can adopt a magnetic structure. For example, a strong magnet is embedded in the head of the fixing member, and a metal sheet is embedded in the back shell of the feedback member. The feedback member is firmly attracted to the fixing member by the magnetic force between the strong magnet and the metal sheet. Using a magnetic connection, the user can easily remove and place the feedback member and adjust the viewing angle.

[0093] The support member is used to support the fixing member and hold the fixing member in the desired position and angle. In one specific embodiment, the support member is a serpentine tube. The serpentine tube consists of multiple interlocking nodes, which achieve self-locking fixation after bending at any angle by relying on the friction between the nodes. The user can manually bend the serpentine tube according to their lying position and line of sight to adjust the feedback member to the most comfortable position and angle for their eyes. The bottom of the support member is provided with a base, which is used to stably place the bracket 7 on a flat surface such as a bed or table.

[0094] In an optional implementation, the breathing guidance device further includes a remote control 9. The remote control 9 is wirelessly connected to the control unit, allowing the user to remotely switch training modes and perform related operations. The remote control 9 may be powered by a built-in battery and communicate with the control unit wirelessly (e.g., via infrared or Bluetooth).

[0095] The remote control 9 features a simplified button layout. In one specific embodiment, the remote control 9 has only three buttons: a select button, an confirm button, and a return button. These three buttons can be distinguished by different shapes, sizes, or surface textures; for example, the select button could be triangular, the confirm button circular, and the return button square; or the select button could have raised dots, the confirm button smooth, and the return button striped. This differentiated button design allows users lying down to accurately determine the position and function of each button simply by touching it with their fingers, without needing to look at the remote control 9, and to complete all operations such as mode selection, starting training, and ending training. This simplified interaction method is particularly suitable for radiotherapy patients with limited mobility, lowering the barrier to entry.

[0096] In one optional implementation, the control unit provides at least three training modes for the breathing guidance device: a normal mode, a preset mode, and an auxiliary mode. The user can select the mode via the touch interface of the feedback device or the remote control 9.

[0097] In the normal mode, the control unit keeps all moving parts 5 in the second position, meaning that the straps 3 of any wearing part 101 are not locked, allowing the user to breathe freely. The control unit collects the user's breathing waveforms over multiple breathing cycles using the sensors, and uses these as the reference waveform for the normal mode. After the reference waveform is collected, the user can change the reference waveform according to their own feelings; any waveform that meets the preset breathing pattern requirements can be set as the reference. In subsequent training, the control unit compares and analyzes the real-time collected breathing waveforms with the reference waveforms, determining whether the training is passed if it is within the allowable error range, and failing if it exceeds the error range. The control unit then provides real-time text and voice reminders to the user regarding the current breathing training results and areas for improvement.

[0098] In the preset mode, medical personnel preset all parameters, including breathing mode, cycle, amplitude, and waveform, within the control unit based on the user's breathing status during training and clinical treatment requirements, generating a standard waveform as a benchmark. Alternatively, a breathing waveform that meets clinical requirements can be collected from the user as a benchmark. Once the benchmark is set, the user cannot change it. In subsequent training, the control unit compares and analyzes the real-time collected breathing waveform with the benchmark waveform. If the waveform falls within the allowable error range, the training is considered successful; if it exceeds the error range, the training is considered unsuccessful. The control unit then provides real-time text and voice prompts to the user regarding the success of the current breathing training and areas for improvement.

[0099] In the auxiliary mode, when the user selects diaphragmatic breathing training, the control unit sends a braking command to the wearable device 101 worn on the chest, causing the moving parts 5 in the wearable device 101 to move to the first position, locking the extension and retraction of the chest strap 3, and restricting changes in the user's chest cavity. At this time, the system only collects and analyzes abdominal breathing signals to help the user train for correct diaphragmatic breathing. When the user selects thoracic breathing training, the control unit sends a braking command to the wearable device 101 worn on the abdomen, causing the moving parts 5 in the wearable device 101 to move to the first position, locking the extension and retraction of the abdominal strap 3, and restricting changes in the user's abdomen. At this time, the system only collects and analyzes chest breathing signals to help the user train for correct thoracic breathing. The user can also feel and correct their breathing pattern in real time by observing changes in the force at the locked strap 3. When exiting the auxiliary mode or when the device is powered off, all moving parts 5 automatically return to the second position, releasing the lock.

[0100] In an optional implementation, the control unit is also equipped with an automatic reminder function for achieving training goals. The control unit records data such as the date, duration, number of training sessions, and pass rate for each user's training session. When the user's daily training sessions and pass rate reach preset thresholds for several consecutive days, the control unit automatically issues a reminder via the feedback mechanism, indicating that the user's breathing training has met clinical treatment requirements and that they can go to the hospital for radiotherapy. This function allows users to understand their training progress independently without relying on medical personnel, avoiding treatment delays caused by information asymmetry.

[0101] The following describes the specific application of the breathing guidance device provided in this embodiment in breathing training before radiotherapy.

[0102] Radiation therapy (especially for thoracic and abdominal tumors) requires patients to maintain a specific breathing pattern during treatment, such as deep inhalation and breath-holding, to keep the tumor in a relatively static position, thereby improving irradiation accuracy and reducing damage to surrounding normal tissues. Before radiation therapy, patients need to undergo systematic breathing training to master the correct breathing method and establish a stable breathing rhythm. The breathing guidance device provided in this embodiment is particularly suitable for this application scenario.

[0103] In use, first, place the first and second fittings on the patient's chest and abdomen respectively. Pull out the strap 3 and wrap it around the body, then insert the strap head 31 into the locking slot 17 on the housing 1 to lock it in place. Adjust the tightness of the strap 3 to ensure it fits snugly against the body. Attach the display screen 8 magnetically to the head of the bracket 7, and adjust the serpentine tube to position the display screen 8 in the most comfortable viewing position for the patient while lying down. Turn on the power to each module, and the devices will automatically perform wireless transmission pairing. After successful pairing, the display screen 8 will display three breathing training modes for selection.

[0104] In both standard and preset modes, the patient's breathing movements cause changes in the length of the strap 3, which in turn rotates the rotating component 2. This rotation is transmitted to the sensor via the gear transmission assembly 28. The sensor converts the rotation into an analog electrical signal. This analog signal is then converted into a digital signal by the A / D conversion circuit in the local acquisition and drive module 6 of the wearable device 101. Finally, it is transmitted to the control unit within the display screen 8 via a wireless transfer circuit. The control unit processes and extracts the breathing waveform data, compares it with a reference waveform, and determines whether the patient has passed the test. The system then provides real-time reminders to the patient via text and voice. When the patient's training frequency and pass rate reach a set threshold over several consecutive days, the system automatically reminds the patient to come to the hospital for radiotherapy.

[0105] When diaphragmatic breathing training is selected in the assisted mode, the control unit sends a braking command to the chest wear device wirelessly. The chest wear device's acquisition and drive module 6 receives the command via its wireless adapter circuit, and the braking drive circuit supplies power to the moving part 5. The push-pull electromagnet is energized, and the locking piece 51 moves to the first position and engages with the corresponding gear in the gear transmission assembly 28, stopping the gear transmission assembly 28 from rotating. This, in turn, locks the rotation of the first shaft via the second shaft 22, keeping the extension length of the chest strap 3 constant and limiting changes in the patient's chest cavity. At this time, the system only collects and analyzes abdominal breathing signals to help the patient train for correct diaphragmatic breathing. The patient can also correct their breathing pattern in real time by observing changes in the force applied to the chest strap 3. When thoracic breathing training is selected, the first shaft of the abdominal wear device is locked, and only chest breathing signals are collected. When exiting the assisted mode or when power is off, the moving part 5 automatically returns to the second position, releasing the lock.

[0106] It should be noted that in the description of this invention, the terms "first," "second," and "third," etc., are used only to distinguish different components or parts, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0107] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A breathing guidance device, characterized in that, It includes at least two wearable devices and a control unit that is communicatively connected to the wearable devices; The wearable device is used to wear at least one on the user's chest and at least one on the user's abdomen; the wearable device includes: case; A rotating component is rotatably mounted within the housing; A strap is driven to the rotating component, and one end of the strap can be pulled out of the housing and detachably connected to the housing. A first elastic element, connected to the rotating element, is used to provide a restoring force to the rotating element so that the strap retracts into the housing; A moving component is disposed opposite to the rotating component, and the moving component is movable between a first position and a second position. In the first position, the moving component prevents the rotating component from rotating, and in the second position, the moving component allows the rotating component to rotate. The control unit is communicatively connected to each of the moving parts and is used to control the breathing guidance device to switch between at least a first mode and a second mode; in the first mode, at least one of the moving parts is in the first position to restrict the breathing movement of the corresponding part; in the second mode, all the moving parts are in the second position.

2. The breathing guidance device according to claim 1, characterized in that, It also includes sensors and feedback devices; the sensors are connected to the rotating component for detecting the amount of rotation of the rotating component and generating sensing information; the control unit controls the feedback device to provide breathing feedback to the user based on the sensing information.

3. The breathing guidance device according to claim 2, characterized in that, It also includes a gear transmission assembly, which includes at least two meshing gears; the rotating part is provided with a first gear, and the sensor is provided with a second gear, the first gear meshing with the input end of the gear transmission assembly, and the second gear meshing with the output end of the gear transmission assembly.

4. The breathing guidance device according to claim 3, characterized in that, When the moving part is in the first position, at least a portion of the moving part is located in the tooth groove of the gear opposite to the moving part in the gear transmission assembly.

5. The breathing guidance device according to claim 4, characterized in that, The moving component includes a push-pull electromagnet, a locking element, and a second elastic element. The locking element is fixedly connected to the moving iron core of the push-pull electromagnet, and the second elastic element is connected to the locking element. When the push-pull electromagnet is energized, the locking element is located in the first position, and at least a portion of the locking element is located in the tooth groove of the gear opposite to the moving component in the gear transmission assembly. When the push-pull electromagnet is de-energized, the locking element is located in the second position and disengaged from the tooth groove.

6. The breathing guidance device according to claim 1, characterized in that, The strap is detachably connected to the rotating component.

7. The breathing guidance device according to claim 1, characterized in that, The rotating component includes a first rotating shaft and two second rotating shafts. The strap is wrapped around the first rotating shaft. The two second rotating shafts are located at both ends of the first rotating shaft and are coaxially arranged with the first rotating shaft, and are circumferentially fixedly connected in a detachable manner.

8. The breathing guidance device according to claim 7, characterized in that, The ends of the first rotating shaft and the second rotating shaft opposite to each other are connected and circumferentially fixed by a surface fitting structure.

9. The breathing guidance device according to claim 7, characterized in that, The end of the second rotating shaft is formed with a flange, the flange having a first limiting surface extending radially outward along the second rotating shaft; The second rotating shaft is also fitted with a baffle and a third elastic element. The baffle can slide along the axial direction of the second rotating shaft. The third elastic element abuts between the second rotating shaft and the baffle and is used to apply a thrust toward the first limiting surface to the baffle so that the baffle abuts against the first limiting surface. When the baffle abuts against the first limiting surface, the baffle, the flange, and the second rotating shaft together define a receiving space. The end of the first rotating shaft is located within the receiving space and is restricted from axial movement and circumferential rotation relative to the second rotating shaft.

10. The breathing guidance device according to claim 7, characterized in that, It also includes a pressure block, which is detachably disposed at the end of the second rotating shaft, and the pressure block has a first limiting surface extending radially outward along the second rotating shaft; The second rotating shaft is also fitted with a baffle and a third elastic element. The baffle can slide along the axial direction of the second rotating shaft. The third elastic element abuts between the second rotating shaft and the baffle and is used to apply a thrust toward the first limiting surface to the baffle so that the baffle abuts against the first limiting surface. When the baffle abuts against the first limiting surface, the inner side of the baffle, the outer peripheral surface of the pressure block, and the outer peripheral surface of the second rotating shaft together define a receiving space. The end of the first rotating shaft is located within the receiving space and is restricted from axial movement and circumferential rotation relative to the second rotating shaft.

11. The breathing guidance device according to claim 1, characterized in that, The first elastic element includes a spiral spring, the inner ring of which is connected to the rotating element, and the outer ring of which is connected to the housing.

12. The breathing guidance device according to claim 1, characterized in that, The extended end of the strap is provided with a strap head, and the strap head is provided with a groove; the housing is provided with a releasable locking structure, which engages with the groove to releasably lock the strap head onto the housing.

13. The breathing guidance device according to claim 2, characterized in that, The feedback element includes a display screen and / or a speaker; when the feedback element includes a display screen, the control unit is disposed inside the display screen.

14. The breathing guidance device according to claim 13, characterized in that, It also includes a bracket, which includes a fixing member and a support member. The fixing member is used to detachably connect to the display screen, and the support member is used to support the fixing member and hold the display screen in a position for the user to view.

15. The breathing guidance device according to claim 1, characterized in that, It also includes a remote control, which is wirelessly connected to the control unit and is used for users to switch modes.

16. The application of the breathing guidance device according to any one of claims 1 to 15 in breathing training before radiotherapy.

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