Restraint device for agitated patients

Abstract

This invention discloses a restraint device for agitated patients, relating to the field of medical device technology. It includes a bed body, a restraint assembly, and a temperature control device. The restraint assembly comprises a locking box, a restraint strap, a transmission device, an expansion tube, a sensing device, and a locking device. The expansion tube is filled with an expansion medium, and its side wall has a guide rail. The locking device includes a sliding column, a pull plate, an elastic element, and an internal gear. The sliding column engages with the guide rail via a guide ball. By detecting the interface pressure, when the pressure exceeds a threshold, the expansion medium is heated, causing it to push the sliding column along the guide rail, resulting in a slight loosening of the restraint strap. When the pressure falls below the threshold, heating stops, and the elastic element causes the locking device to reset, slightly tightening the restraint strap. This invention, by setting up the restraint assembly, can restrain and fix the patient's limbs on one hand, and adaptively adjust to changes in swelling and reduction on the other, avoiding the risks of excessive pressure and restraint failure.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a restraint device for agitated patients. Background Technology

[0002] Patients in the intensive care unit (ICU) often exhibit behaviors such as unintentional removal of tubes or attempts to get out of bed due to factors such as impaired consciousness or agitation during the anesthesia recovery period. Clinically, restraint straps, restraint gloves, and other devices are commonly used to protect the patient's limbs to prevent unplanned tube removal and falls from bed.

[0003] However, in actual clinical use, the volume of a patient's limb is not constant. Influenced by factors such as drug infusion, fluid resuscitation, and inflammatory responses, the patient's arm may experience physiological swelling during restraint; as the condition improves or the patient's position is adjusted, the swelling may gradually subside. This dynamic change in arm volume presents a dilemma for existing restraint devices:

[0004] When the arm swells, the fixed-length restraints exert excessive pressure on the local soft tissues, causing skin marks and pain in mild cases, and potentially leading to obstructed venous return, tissue ischemia, or even nerve damage in severe cases. According to clinical nursing guidelines, nurses need to frequently assess peripheral circulation at the restraint site, manually loosen and readjust the tightness of the restraints, which is a heavy workload with inherent delays. As the swelling subsides and the arm shrinks, gaps appear between the restraints and the skin, significantly increasing the risk of restraint failure and posing a safety hazard to the patient who may break free and have their tubes removed.

[0005] Therefore, there is a need for a restraint device that can automatically, reliably, and safely make adaptive micro-adjustments based on changes in the patient's arm volume while maintaining effective restraint. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0007] To achieve the above objectives, the first aspect of the present invention provides a restraint device for agitated patients, comprising: a bed body, restraint components, and a temperature regulating device, wherein multiple restraint components are respectively disposed on the bed body; the temperature regulating device is disposed on the bed body; each restraint component includes: a locking box, a restraint strap, a transmission device, an expansion tube, a sensing device, and a locking device, wherein the locking box has a guide groove extending through both sides, and the interior of the locking box has a storage slot communicating with the guide groove; one end of the restraint strap is disposed on the locking box, and the other end passes through the guide groove and extends therefrom, and the restraint strap is provided with transmission teeth; the transmission device is disposed in the storage slot and meshes with the transmission teeth, and its transmission end extends to the outside of the locking box; the expansion tube... The locking device is mounted on the locking box, and its cavity is filled with an expansion medium. A guide rail is provided on its side wall. The sensing device is configured to detect the interfacial pressure between the restraint band and the skin, and to control the heating temperature of the expansion medium to cause it to expand. The locking device includes a sliding post, a pull plate, an elastic element, and an internal gear. The sliding post has a guide ball that cooperates with the guide rail, and one end of the sliding post extends into the cavity of the expansion tube. When the expansion medium expands, it pushes the sliding post to slide along the guide rail. The pull plate is mounted on the sliding post. The elastic element is sleeved on the expansion tube, and its two ends are respectively connected to the pull plate and the locking box. One end of the internal gear is mounted on the pull plate and slidably engages with the transmission end of the transmission device.

[0008] In addition, the restraint device for agitated patients proposed according to the present invention may also have the following additional technical features:

[0009] Furthermore, the transmission teeth are located on the outer wall of the constraint belt, and the transmission device includes: a first gear, a transmission rod, and a second gear, wherein the first gear is axially connected to the storage groove and meshes with the transmission teeth; the transmission rod is axially connected to the outer wall of the locking box, and one end of the rod extends into the locking box and is connected to the first gear, while the other end is provided with the second gear and is located inside the expansion tube, and the second gear meshes with the internal gear.

[0010] Furthermore, the guide rail consists of a straight rail and an inclined rail, with the straight rail on the side closer to the locking box and the inclined rail on the side farther away from the locking box.

[0011] Furthermore, the sensing device includes: a pressure sensor, a constraint controller, a heating element, and a temperature sensor, wherein the pressure sensor is disposed on the inner side of the constraint band; the heating element is disposed on the outer wall of the expansion tube; the constraint controller is disposed on the locking box and electrically connected to the pressure sensor and the heating element; and the temperature sensor is disposed on the outer side of the expansion tube and electrically connected to the constraint controller.

[0012] Furthermore, the bed body includes: a bed board, a mattress, a protective frame, and casters, wherein the bed board has a temperature control cavity inside; the mattress is laid on the bed board; the protective frame is located on both sides of the bed board, and the locking box is installed on the protective frame through a connector; the casters are located at the bottom of the bed board through a bracket.

[0013] Furthermore, the bed board has through openings at its four corners, and each opening is equipped with a flipping structure. The flipping structure includes a flip plate and an electric cylinder. The flip plate is hinged to the bed board inside the opening, and the four corners of the mattress are connected to each flip plate. The electric cylinder is mounted on the bracket via a mounting frame, and its drive end is hinged to the bottom of the flip plate.

[0014] Furthermore, the temperature control device includes: a temperature control host, which is located at the bottom of the bed board and integrates a water storage tank, a water pump, a heater, a cooler and a temperature controller; and a water pipe network, which is located in the temperature control cavity and connected to the temperature control host.

[0015] Furthermore, the constraint controller is configured with a preset pressure safety range: when the interface pressure detected by the pressure sensor exceeds the preset upper limit threshold and continues for a preset time, the constraint controller controls the heating element to start heating, the expansion medium expands when heated, causing the constraint band to loosen slightly; when the interface pressure detected by the pressure sensor is lower than the preset lower limit threshold, the constraint controller controls the heating element to stop heating, the expansion medium cools and contracts naturally, the elastic element drives the locking device and the transmission device to reset, causing the constraint band to tighten slightly.

[0016] Furthermore, the elastic element is a rotational tension spring.

[0017] The present invention provides a restraint device for agitated patients. By setting restraint components, it can restrain and fix the patient's limbs on the one hand, and adaptively adjust to changes in swelling and swelling on the other hand, avoiding the risk of excessive pressure and restraint failure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a restraint device for agitated patients according to an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of another restraint device for agitated patients according to an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional structural schematic diagram of a restraint component of a restraint device for agitated patients according to an embodiment of the present invention;

[0022] Figure 4 This is an exploded perspective view of the restraint assembly of a restraint device for agitated patients according to an embodiment of the present invention.

[0023] Figure 5 This is an exploded perspective view of the restraint assembly of another restraint device for agitated patients according to an embodiment of the present invention.

[0024] Figure 6 This is a restraint device for agitated patients according to an embodiment of the present invention. Figure 5 A magnified structural diagram of part A in the middle;

[0025] Figure 7 This is a restraint device for agitated patients according to an embodiment of the present invention. Figure 5 A magnified structural diagram of part B in the middle;

[0026] Figure 8 This is a block diagram of a temperature control device for a restraint device for agitated patients according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram showing the unfolded cavity of the expansion tube of a restraint device for agitated patients according to an embodiment of the present invention.

[0028] As shown in the figure:

[0029] 1. Bed frame; 11. Bed board; 12. Mattress; 13. Protective frame; 14. Casters; 2. Restraint assembly; 21. Locking box; 211. Guide groove; 212. Storage groove; 22. Restraint strap; 221. Transmission gear; 23. Transmission device; 231. First gear; 232. Transmission rod; 233. Second gear; 24. Expansion tube; 241. Guide rail; 2411. Straight rail; 2412. Inclined rail; 25. Sensing device; 251. Pressure 252. Sensor; 253. Constraint controller; 254. Heating element; 255. Temperature sensor; 26. Locking device; 261. Sliding column; 2611. Guide ball; 262. Pull plate; 263. Elastic element; 264. Internal gear; 3. Temperature control device; 31. Temperature control host; 32. Water storage tank; 33. Water pump; 34. Heater; 35. Refrigerator; 36. Temperature controller; 37. Water pipe network; 4. Tilting structure; 41. Tilting plate; 42. Electric cylinder. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, with examples of the embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following description, in conjunction with the accompanying drawings, describes a restraint device for agitated patients according to an embodiment of the present invention.

[0032] like Figures 1 to 9 As shown, an embodiment of the present invention provides a restraint device for agitated patients, comprising: a bed body 1, a restraint assembly 2, and a temperature control device 3.

[0033] Multiple constraint components 2 are respectively installed on the bed body 1, and the temperature control device 3 is installed on the bed body 1.

[0034] The bed body 1 includes: bed board 11, mattress 12, protective frame 13 and casters 14.

[0035] The bed board 11 has a temperature control chamber inside, the mattress 12 is laid on the bed board 11, the protective frame 13 is set on both sides of the bed board 11, and the locking box 21 is installed on the protective frame 13 through the connector. The moving wheels 14 are set at the bottom of the bed board 11 through the bracket.

[0036] Specifically, the protective frame 13 is a foldable frame with a self-locking function (not shown in the figure), which facilitates nursing operations by medical staff or allows patients to get in and out of bed.

[0037] Preferably, the caster wheel 14 is a silent universal wheel with a self-locking function (not shown in the figure), which has low rolling noise, will not disturb the rest of other patients in the intensive care unit, and prevents the device from sliding accidentally, ensuring stability during use.

[0038] Specifically, restraint component 2 has four parts, corresponding to the patient's left and right wrists and left and right ankles respectively.

[0039] The restraint assembly 2 includes: a locking box 21, a restraint belt 22, a transmission device 23, an expansion tube 24, a sensing device 25, and a locking device 26.

[0040] The locking box 21 has guide grooves 211 extending through both sides, and a storage slot 212 is provided inside the locking box 21, which is connected to the guide grooves 211. One end of the restraint strap 22 is set on the locking box 21, and the other end passes through the guide groove 211 and extends outward. The restraint strap 22 is provided with transmission teeth 221. The transmission device 23 is set in the storage slot 212 and meshes with the transmission teeth 221. Its transmission end extends to the outside of the locking box 21. The expansion tube 24 is set on the locking box 21, and its cavity is filled with an expansion medium. A guide rail 241 is provided on its side wall. The sensing device 25 is configured to detect the interface pressure between the restraint strap 22 and the skin, and control the heating temperature of the expansion medium to make it expand.

[0041] It should be noted that the transmission teeth 221 are located on the outer wall of the restraint belt 22, which avoids the transmission teeth 221 structure from pressing on the skin and causing indentations or damage, thus improving wearing comfort and safety.

[0042] Preferably, the inner side of the restraint strap 22 is provided with a skin-friendly and breathable silicone pad (not shown in the figure) to improve the patient's wearing comfort.

[0043] Specifically, the restraint strap 22 is made of medical-grade nylon braided strap, which has high tensile strength, wear resistance, is not easy to break, and has good rigidity, making it difficult to detach from the first gear 231.

[0044] The transmission device 23 includes: a first gear 231, a transmission rod 232, and a second gear 233.

[0045] The first gear 231 is axially connected to the storage slot 212 and meshes with the transmission gear 221. The transmission rod 232 is axially connected to the outer wall of the locking box 21, with one end extending into the locking box 21 and connected to the first gear 231. The other end is provided with a second gear 233, which is located in the expansion tube 24 and meshes with the internal gear 264.

[0046] Specifically, the guide rail 241 consists of a straight rail 2411 and an inclined rail 2412. The straight rail 2411 is closer to the locking box 21, and the inclined rail 2412 is farther away from the locking box 21. The limiting design of the straight rail 2411 limits the constraint band 22 and prevents it from moving in the guide groove 211.

[0047] Specifically, the aforementioned expansion medium is thermally expandable silicone rubber, which can remain solid at both room temperature and under heating conditions.

[0048] The sensing device 25 includes: a pressure sensor 251, a constraint controller 252, a heating element 253, and a temperature sensor 254.

[0049] The pressure sensor 251 is located on the inner side of the constraint band 22, the heating element 253 is located on the outer wall of the expansion tube 24, the constraint controller 252 is located on the locking box 21 and is electrically connected to the pressure sensor 251 and the heating element 253, and the temperature sensor 254 is located on the outer side of the expansion tube 24 and is electrically connected to the constraint controller 252.

[0050] Preferably, the pressure sensor 251 is a flexible thin-film pressure sensor, which is embedded at intervals inside the restraint band 22 along the length direction of the restraint band 22, and is used to detect the interface pressure between the restraint band 22 and the patient's skin in real time.

[0051] Preferably, the heating element 253 is a miniature polyimide film heating element, which is attached to and wrapped around the outer wall of the expansion tube 24, and can heat the expansion medium inside the expansion tube 24 after being energized.

[0052] The locking device 26 includes: a sliding column 261, a pull plate 262, an elastic element 263, and an internal gear 264.

[0053] The sliding column 261 is equipped with a guide ball 2611, which cooperates with the guide rail 241. One end of the sliding column 261 extends into the cavity of the expansion tube 24. When the expansion medium expands, it pushes the sliding column 261 to slide along the guide rail 241. The pull plate 262 is set on the sliding column 261. The elastic element 263 is sleeved on the expansion tube 24, and its two ends are respectively connected to the pull plate 262 and the locking box 21. One end of the internal gear 264 is set on the pull plate 262 and slides to engage the transmission end of the transmission device 23.

[0054] Specifically, the elastic element 263 is a rotary tension spring, which can withstand axial tensile deformation and torsional deformation around the axis of the expansion tube 24. It is used to provide a restoring force when the expansion medium cools and contracts, pulling the locking device 26 back to its initial position.

[0055] The temperature control device 3 includes: a temperature control host 31, which is located at the bottom of the bed board 11 and integrates a water storage tank 32, a water pump 33, a heater 34, a cooler 35 and a temperature controller 36; and a water pipe network 37, which is located in the temperature control cavity and connected to the temperature control host 31.

[0056] Specifically, the inlet and outlet of the water pipe network 37 are connected to the temperature control host 31 to form a closed liquid circulation loop. The target temperature is set by the temperature controller 36, and the water pump 33 drives the liquid to circulate between the water storage tank 32, the heater 34 or the cooler 35 and the water pipe network 37 to achieve active heating or cooling regulation of the surface temperature of the mattress 12.

[0057] Specifically, the temperature control host 31 has a display panel and operation buttons on its outer casing. The display panel is electrically connected to the temperature controller 36 and is used to display the current temperature and the set temperature. The operation buttons are used to input the target temperature and switch between heating or cooling modes.

[0058] More specifically, the display panel is an LED digital tube display screen.

[0059] It should be noted that the four corners of the bed board 11 have through openings, and each opening is equipped with a flipping structure 4. When it is necessary to assist the patient in turning over, the two flipping boards 41 on one side can be driven to rotate individually or simultaneously, causing the corresponding edge of the mattress 12 to rise and form an inclined support surface, assisting the patient in changing position to the other side.

[0060] The flipping structure 4 includes: a flip plate 41 and an electric cylinder 42.

[0061] The flip-up plate 41 is hinged to the bed board 11 inside the opening, and the four corners of the mattress 12 are connected to each flip-up plate 41. The electric cylinder 42 is mounted on the bracket through the mounting bracket, and its drive end is hinged to the bottom of the flip-up plate 41.

[0062] Specifically, first, the nurse wraps the restraint strap 22 around the patient's wrist or ankle. Then, the nurse pulls the pull plate 262, causing the sliding column 261 to move and then rotate along the guide rail 241 via the guide ball 2611. This, in turn, causes the internal gear 264 to move and then rotate via the pull plate 262. The rotating internal gear 264 then sequentially drives the second gear 233, the transmission rod 232, and the first gear 231 to rotate. Then, the nurse continues to pull the pull plate 262, causing the internal gear 264 to disengage from the second gear 233. Simultaneously, the elastic element 263... After stretching and deforming, the restraint strap 22 is twisted and deformed. Then, the free end of the restraint strap 22 is passed through the guide groove 211, and the free end of the restraint strap 22 is pulled according to the thickness of the patient's limb to adjust to a suitable tightness. After adjustment, the pull plate 262 is released, and due to the rebound potential energy of the elastic element 263 itself, the locking device 26 is driven to reset, so that the internal gear 264 is limited on the second gear 233, and maintains a meshing state with the transmission gear 221 through the first gear 231, so that the restraint strap 22 cannot loosen on its own. Finally, the locking box 21 is fixed to the protective frame 13 through the connector to complete the wearing.

[0063] Specifically, the above-mentioned clinical standard for appropriate tightness is that one to two fingers can be inserted between the restraint strap 22 and the skin.

[0064] When the arm swells, the interface pressure between the restraint strap 22 and the skin gradually increases. The pressure sensor 251 continuously detects the interface pressure in real time and transmits the pressure data to the restraint controller 252.

[0065] The restraint controller 252 uses a built-in preset pressure safety range. When the restraint controller 252 determines that the interface pressure exceeds the preset upper limit threshold and continues for a preset time, the restraint controller 252 determines that "limb swelling causes the restraint to be too tight" and then automatically starts the loosening adjustment program.

[0066] Specifically, the aforementioned pressure safety range is, for example, 15 mmHg to 30 mmHg.

[0067] Specifically, the preset time is, for example, 2 minutes.

[0068] The constraint controller 252 controls the heating element 253 to be energized and generate heat. The heat is conducted to the expansion medium in the expansion tube 24 cavity. After being heated, its volume increases and pushes the sliding column 261 to move away from the locking box 21 along the straight rail 2411 and the inclined rail 2412 in sequence.

[0069] At the same time, the sliding column 261 drives the pull plate 262 and the internal gear 264 to move first and then rotate. The rotating internal gear 264 drives the second gear 233 to rotate. Then the second gear 233 drives the first gear 231 to rotate synchronously through the transmission rod 232, and drives the constraint belt 22 to move slightly in the loosening direction through the transmission teeth 221 meshing with it. At this time, the constraint belt 22 is loosened.

[0070] When the swelling in the arm subsides, a loose gap appears between the restraint strap 22 and the skin, and the interface pressure decreases. When the restraint controller 252 determines that the interface pressure is lower than the preset lower limit threshold and continues for more than the preset time, the restraint controller 252 determines that "the limb swelling has caused the restraint to loosen" and then starts the tightening adjustment program.

[0071] The constraint controller 252 controls the heating element 253 to be de-energized. The volume of the expansion medium naturally cools and contracts under the influence of ambient temperature and patient body temperature, which weakens the thrust on the sliding column 261. The tensile and torsional elastic potential energy stored in the elastic element 263 begins to be released, pulling the pull plate 262 and the sliding column 261 to slide in the opposite direction along the guide rail 241.

[0072] The reset motion of the pull plate 262 drives the second gear 233 to rotate in the opposite direction through the internal gear 264. This rotation is transmitted through the transmission rod 232 and the first gear 231, driving the constraint belt 22 to move slightly in the tightening direction to eliminate loose gaps. When the pressure sensor 251 detects that the interface pressure has risen back to the safe range, the tightening adjustment process ends, and the constraint belt 22 is effectively locked in the new tightening position.

[0073] In summary, the present invention provides a restraint device for agitated patients. By setting the restraint component 2, it can restrain and fix the patient's limbs on the one hand, and adaptively adjust to the swelling and reduction of the patient's swelling on the other hand, avoiding the risk of excessive pressure and restraint failure.

[0074] In the description of this specification, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A restraint device for a restless patient, characterized in that include: The bed body (1), the restraint assembly (2), and the temperature control device (3) are included. Multiple constraint components (2) are respectively disposed on the bed body (1); The temperature control device (3) is installed on the bed body (1); The constraint assembly (2) includes: a locking box (21), a constraint strap (22), a transmission device (23), an expansion tube (24), a sensing device (25), and a locking device (26), wherein, The locking box (21) has a guide groove (211) that runs through both sides, and the locking box (21) has a storage groove (212) inside, which is connected to the guide groove (211). One end of the constraint band (22) is disposed on the locking box (21), and the other end passes through the guide groove (211) and extends therein. The constraint band (22) is provided with transmission teeth (221). The transmission device (23) is disposed in the storage slot (212) and meshes with the transmission gear (221), with its transmission end extending to the outside of the locking box (21). The expansion tube (24) is installed on the locking box (21), and its cavity is filled with an expansion medium, and a guide rail (241) is provided on its side wall. The sensing device (25) is configured to detect the interfacial pressure between the restraint band (22) and the skin, and to control the heating temperature of the expansion medium to cause it to expand. The locking device (26) includes: a sliding column (261), a pull plate (262), an elastic element (263), and an internal gear (264), wherein, The sliding column (261) is provided with a guide ball (2611) and cooperates with the guide rail (241). One end of the sliding column (261) extends into the cavity of the expansion tube (24). When the expansion medium expands, it pushes the sliding column (261) to slide along the guide rail (241). The pull plate (262) is disposed on the sliding column (261); The elastic element (263) is sleeved on the expansion tube (24), and its two ends are respectively connected to the pull plate (262) and the locking box (21); One end of the internal gear (264) is disposed on the pull plate (262) and slidably meshes with the transmission end of the transmission device (23).

2. A restraint device for agitated patients according to claim 1, wherein The transmission gear (221) is located on the outer wall of the constraint belt (22), and the transmission device (23) includes: a first gear (231), a transmission rod (232), and a second gear (233), wherein, The first gear (231) is axially connected in the storage groove (212) and meshes with the transmission gear (221). The transmission rod (232) is axially mounted on the outer wall of the locking box (21), with one end extending into the locking box (21) and connected to the first gear (231), and the other end is provided with the second gear (233) and located inside the expansion tube (24), and the second gear (233) meshes with the internal gear (264).

3. A restraint device for agitated patients as defined in claim 1, characterized in that The guide rail (241) consists of a straight rail (2411) and a slanted rail (2412), with the straight rail (2411) on the side closer to the locking box (21) and the slanted rail (2412) on the side away from the locking box (21).

4. A restraint device for agitated patients as defined in claim 1, wherein The sensing device (25) includes: a pressure sensor (251), a constraint controller (252), a heating element (253), and a temperature sensor (254), wherein, The pressure sensor (251) is disposed on the inner side of the constraint band (22); The heating element (253) is disposed on the outer wall of the expansion tube (24); The constraint controller (252) is disposed on the locking box (21) and electrically connected to the pressure sensor (251) and the heating element (253); The temperature sensor (254) is located on the outside of the expansion tube (24) and is electrically connected to the constraint controller (252).

5. A restraint device for agitated patients according to claim 1, characterized in that, The bed body (1) includes: a bed board (11), a mattress (12), a protective frame (13), and casters (14), wherein, The bed board (11) has a temperature control cavity inside; The mattress (12) is laid on the bed board (11); The protective frame (13) is disposed on both sides of the bed board (11), and the locking box (21) is installed on the protective frame (13) by means of a connector; The casters (14) are mounted on the bottom of the bed board (11) via a bracket.

6. A restraint device for agitated patients according to claim 5, wherein The bed board (11) has through openings at its four corners, and each opening is equipped with a flipping structure (4). The flipping structure (4) includes a flip plate (41) and an electric cylinder (42). The flap (41) is hinged to the bed board (11) inside the opening, and the four corners of the mattress (12) are connected to each of the flaps (41); The electric cylinder (42) is mounted on the bracket via a mounting frame, and its drive end is hinged to the bottom of the flap (41).

7. A restraint device for agitated patients as defined in claim 5, wherein The temperature control device (3) includes: The temperature control unit (31) is located at the bottom of the bed board (11), and its interior integrates a water tank (32), a water pump (33), a heater (34), a cooler (35) and a temperature controller (36). Water pipe network (37) is installed inside the temperature control cavity and connected to the temperature control host (31).

8. A restraint device for agitated patients as defined in claim 4, wherein The constraint controller (252) is configured with a preset pressure safety range: when the interface pressure detected by the pressure sensor (251) exceeds the preset upper limit threshold and continues for a preset time, the constraint controller (252) controls the heating element (253) to start heating, the expansion medium expands when heated, causing the constraint band (22) to loosen slightly; when the interface pressure detected by the pressure sensor (251) is lower than the preset lower limit threshold, the constraint controller (252) controls the heating element (253) to stop heating, the expansion medium cools and contracts naturally, and the elastic element (263) drives the locking device (26) and the transmission device (23) to reset, causing the constraint band (22) to tighten slightly.

9. A restraint device for agitated patients according to claim 8, wherein The elastic element (263) is a rotational tension spring.

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