Anti-pinch electric bed

Abstract

The embodiment of the invention provides an anti-pinch electric bed. The anti-pinch electric bed comprises a bed frame, a bed cover and a clamping device, the bed plate is rotationally connected with the bed frame; the driving mechanism is connected with the bed board and can drive the bed board to turn over relative to the bed frame; the air bag penetrates through the bed plate; the pressure sensor is communicated with the air bag and can obtain the air pressure value of the air bag; the controller is electrically connected with the driving mechanism and the pressure sensor, the air bag has an execution mode and a detection mode, when the air bag is in the execution mode, the air bag is used for supporting a user, and when the driving mechanism drives the bed board to turn over relative to the bed frame in the folding direction, the air bag is switched to the detection mode; the controller controls the driving mechanism to drive the bed board according to a preset mode. Through the arrangement, the air bag can serve as a component for improving the comfort of a user and can also serve as a component for anti-pinch detection, and compared with a traditional scheme, the structure is simpler, and the cost is lower.

Description

Technical Field

[0001] The present invention relates to the technical field of electric beds, and in particular to an anti-pinch electric bed. Background Art

[0002] With the continuous development of smart homes, beds are constantly moving towards electrification and intelligence. Electric beds are gradually becoming popular in the market. Some bed boards of electric beds can be lifted or rotated relative to the bed frame, making it easier for users to find a more comfortable position. At the same time, there is a considerable gap between the bed board and the bed frame, and there is a risk of users being pinched. Therefore, electric beds need to be equipped with anti-pinch detection functions to ensure user safety.

[0003] In the related art, anti-pinch detection is mainly achieved by installing special detection sensors on the bed frame or bed board. For example, the bed board and bed frame are used as the two plates of a capacitor. When an object enters, the capacitance value changes, thereby achieving anti-pinch detection. Alternatively, an infrared transceiver sensor is installed on the bed frame. When the infrared light is blocked, it is considered that an object has entered between the bed board and the bed frame, thereby achieving anti-pinch detection. However, these methods require a large number of detection sensors, the structure is relatively complex, and the cost is too high. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an anti-pinch electric bed, which can realize anti-pinch detection and has a relatively lower cost.

[0005] An embodiment of the present invention provides an anti-pinch electric bed, which includes: a bed frame; a bed board, rotatably connected to the bed frame; a driving mechanism, connected to the bed board and capable of driving the bed board to flip relative to the bed frame; an airbag, penetrated through the bed board; a pressure sensor, connected to the airbag and capable of obtaining the air pressure value of the airbag; a controller, electrically connected to the driving mechanism and the pressure sensor, the airbag having an execution mode and a detection mode, when the airbag is in the execution mode, the airbag is used to support the user, when the driving mechanism drives the bed board to flip relative to the bed frame in a closing direction, the airbag switches to the detection mode, and if the air pressure value is greater than a first preset value, the controller controls the driving mechanism to drive the bed board in a preset manner.

[0006] The anti-pinch electric bed provided by the embodiment of the present invention has at least the following beneficial effects:

[0007] By setting up an airbag, a pressure sensor and a controller, the airbag is installed in the bed board. The airbag can support the user in the execution mode, and when the driving mechanism drives the bed board to flip relative to the bed frame, the airbag switches to the detection mode. When the air pressure value is greater than the first preset value, it is detected that the user is pinched. The controller can control the driving mechanism to drive the bed board in a preset manner to avoid the user from being pinched. With this arrangement, the airbag can be used as a component to enhance the user's comfort, and can also be used as an anti-pinch detection component. Compared with traditional solutions, the structure is simpler and the cost is lower.

[0008] In an embodiment of this implementation mode, the airbag includes a supporting surface and a detecting surface, the supporting surface faces away from the bed frame, and the detecting surface faces the bed frame. The supporting surface is used to support the user, and when the airbag is in the detecting mode, the detecting surface protrudes relative to the bed board.

[0009] In an embodiment of this implementation manner, the number of the airbags and the pressure sensors are both multiple, the multiple airbags and the multiple pressure sensors are connected one-to-one, and the multiple airbags are arranged in sequence on the bed board.

[0010] In an example of this implementation, the airbag is in the shape of an elongated strip, the length direction of the airbag is parallel to the plane around which the bed board is relative to the bed frame, and the arrangement direction of the plurality of airbags is perpendicular to the plane around which the bed board is relative to the bed frame.

[0011] In an example of this implementation manner, the controller is used to receive a sensitivity adjustment instruction and set a trigger difference according to the sensitivity adjustment instruction, and the trigger difference is the difference between the first preset value and the air pressure value.

[0012] In an embodiment of this implementation, the anti-pinch electric bed includes an air pressure regulator, which is connected to the airbag and electrically connected to the controller. When the airbag is in the execution mode, the controller can control the air pressure regulator to inflate and deflate the airbag to adjust the air pressure value.

[0013] In an example of this implementation, before the airbag switches to the detection mode, if the air pressure value is less than a second preset value, the controller controls the air pressure regulator to inflate the airbag so that the air pressure value is greater than or equal to the second preset value.

[0014] In an example of this implementation, after the controller controls the air pressure regulator to inflate the airbag so that the air pressure value is greater than or equal to the second preset value, the controller controls the driving mechanism to drive the bed board to flip relative to the bed frame.

[0015] In an example of this implementation, when the airbag is in the detection mode, if the air pressure value is greater than a first preset value, the controller controls the driving mechanism to stop driving the bed board, or drives the bed board to flip relative to the bed frame along the deployment direction.

[0016] In an embodiment of this implementation, the driving mechanism includes a motor and a push rod, the motor is installed on the bed frame, one end of the push rod is connected to the motor, and the other end of the push rod is connected to the bed board, the motor can drive the push rod to extend and retract, and the motor is electrically connected to the controller.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a schematic diagram of the connection relationship of various components in an anti-pinch electric bed according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of an anti-pinch electric bed in an initial state according to an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure of the anti-pinch electric bed in the front view direction;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of an anti-pinch electric bed in a working state according to an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure of the anti-pinch electric bed in the front view direction.

[0024] Reference numerals:

[0025] Anti-pinch electric bed 100; bed frame 10; bed board 20; mounting hole 201; first surface 202; second surface 203; drive mechanism 30; motor 31; push rod 32; air bag 40; air pipe 41; support surface 401; detection surface 402; pressure sensor 50; controller 60; air pressure regulator 70. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] See also Figures 1 to 5 , Figure 1 It is a schematic diagram of the connection relationship of various components in an anti-pinch electric bed 100 according to an embodiment of the present invention; Figure 2 is a schematic diagram of the three-dimensional structure of an anti-pinch electric bed 100 in an initial state according to an embodiment of the present invention; Figure 3 yes Figure 2 A schematic structural diagram of the anti-pinch electric bed 100 in the front view direction; Figure 4 It is a schematic diagram of the three-dimensional structure of an anti-pinch electric bed 100 in a working state according to an embodiment of the present invention; Figure 5 yes Figure 4 A schematic structural diagram of the anti-pinch electric bed 100 in the front view direction.

[0032] The embodiment of the present invention provides an anti-pinch electric bed 100, which includes a bed frame 10, a bed board 20, a driving mechanism 30, a pressure sensor 50 and a controller 60. The bed board 20 is rotatably connected to the bed frame 10. The driving mechanism 30 is connected to the bed board 20 and can drive the bed board 20 to flip relative to the bed frame 10. The airbag 40 is arranged on the bed board 20. The pressure sensor 50 is connected to the airbag 40 and can obtain the air pressure value of the airbag 40. The controller 60 is electrically connected to the driving mechanism 30 and the pressure sensor 50. The airbag 40 has an execution mode and a detection mode. When the airbag 40 is in the execution mode, the airbag 40 is used to support the user. When the driving mechanism 30 drives the bed board 20 to flip relative to the bed frame 10 in the closing direction, the airbag 40 switches to the detection mode. If the air pressure value is greater than the first preset value, the controller 60 controls the driving mechanism 30 to drive the bed board 20 in a preset manner.

[0033] Specifically, the bed frame 10 is used to be set on a supporting surface such as the ground, and the bed board 20 is hinged to the bed frame 10 to achieve relative flipping. The bed board 20 is provided with a mounting hole 201, and the airbag 40 is installed in the mounting hole 201. The driving mechanism 30 can drive the bed board 20 to flip relative to the bed frame 10 by driving methods such as hydraulic pressure, pneumatic pressure, and electric, so that the bed board 20 and the bed frame 10 are at a certain opening and closing angle, so that the user can obtain a comfortable lying posture. The opening and closing angle can be selected as 0 degrees, 30 degrees, 45 degrees, 60 degrees, etc., wherein, when the opening and closing angle is 0 degrees, the bed board 20 and the bed frame 10 are flush.

[0034] It should be noted that the bed board 20 can be flipped relative to the bed frame 10 in the closing direction or the unfolding direction, wherein when the bed board 20 is flipped relative to the bed frame 10 in the closing direction, the opening and closing angle between the bed board 20 and the bed frame 10 gradually decreases, and when the bed board 20 is flipped relative to the bed frame 10 in the unfolding direction, the opening and closing angle between the bed board 20 and the bed frame 10 gradually increases. It is understandable that in the process of the driving mechanism 30 driving the bed board 20 to flip relative to the bed frame 10 in the closing direction, if the user accidentally extends his hand or other parts of his body into the gap between the bed board 20 and the bed frame 10, he will be pinched by the bed board 20 and the bed frame 10, resulting in pinching injuries.

[0035] It is understandable that, due to the presence of the airbag 40, the airbag 40 can support the user together with the bed board 20, and the airbag 40 can be used for massage, adjusting the support height, improving the hardness, etc., thereby improving the user's comfort and user experience. At the same time, if the user's body extends into the gap between the bed board 20 and the bed frame 10, the user's body will collide with the airbag 40 during the process of the bed board 20 flipping relative to the bed frame 10 along the closing direction, causing the air pressure value of the airbag 40 to rise. When the air pressure value of the airbag 40 is greater than the first preset value, it can be determined that the user is sandwiched, that is, the first preset value is the collision detection threshold of the airbag 40. When the air pressure value of the airbag 40 is greater than the first preset value, the controller 60 can determine that an abnormal collision has occurred; if the user's body does not extend into the gap between the bed board 20 and the bed frame 10, the air pressure value of the airbag 40 will not change significantly during the process of the bed board 20 flipping relative to the bed frame 10 along the closing direction, and the air pressure value of the airbag 40 is always less than the first preset value, so it can be determined that the user is not sandwiched.

[0036] By setting up an airbag 40, a pressure sensor 50 and a controller 60, the airbag 40 is penetrated through the bed board 20. The airbag 40 can support the user in the execution mode, and when the driving mechanism 30 drives the bed board 20 to flip relative to the bed frame 10, the airbag 40 switches to the detection mode. When the air pressure value is greater than the first preset value, it is detected that the user is pinched. The controller 60 can control the driving mechanism 30 to drive the bed board 20 in a preset manner to avoid the user from being pinched. With this arrangement, the airbag 40 can be used as a component to enhance the user's comfort, and can also be used as an anti-pinch detection component. Compared with the traditional solution, the structure is simpler and the cost is lower.

[0037] In one embodiment of this implementation, please refer to Figures 1 to 5 When the airbag 40 is in the detection mode, if the air pressure value is greater than the first preset value, the controller 60 controls the driving mechanism 30 to stop driving the bed board 20, or drives the bed board 20 to flip relative to the bed frame 10 in the unfolding direction. It can be understood that when the airbag 40 is in the detection mode and the air pressure value is greater than the first preset value, it can be determined that a clamping has occurred, and the controller 60 can control the driving mechanism 30 to stop driving or drive in the opposite direction to avoid worsening of the clamping situation. Specifically, the controller 60 can control the driving mechanism 30 to pause driving, and when the air pressure value drops below the first preset value, it is determined that the clamping situation disappears (for example, the user removes his hand), and then continues to control the driving mechanism 30 to drive the bed board 20 to flip relative to the bed frame 10 in the closing direction.

[0038] In one embodiment of this implementation, please refer to Figure 4 and Figure 5The airbag 40 includes a support surface 401 and a detection surface 402. The support surface 401 faces away from the bed frame 10, and the detection surface 402 faces the bed frame 10. The support surface 401 is used to support the user. When the airbag 40 is in the detection mode, the detection surface 402 protrudes relative to the bed board 20. Specifically, the bed board 20 includes a first surface 202 facing away from the bed frame 10 and a second surface 203 facing the bed frame 10. The detection surface 402 of the airbag 40 protrudes relative to the second surface 203, so that the airbag 40 can contact the user's body, thereby increasing the air pressure value of the airbag 40, so that the controller 60 can control the driving mechanism 30 to respond faster. The support surface 401 of the airbag 40 protrudes relative to the first surface 202, so that the airbag 40 can better support the user and improve the user's comfort.

[0039] In this embodiment, the anti-pinch electric bed 100 has an initial state and a working state. When the anti-pinch electric bed 100 is in the initial state, refer to Figure 2 and Figure 3 , the air pressure of the airbag 40 is equal to the external atmospheric pressure, and the airbag 40 is completely embedded in the bed board 20. At this time, it does not have the anti-pinch detection function, but it can reduce the load of the airbag 40 and increase the life of the airbag 40. When the anti-pinch electric bed 100 is in working state, please refer to Figure 4 and Figure 5 The air pressure value of the airbag 40 is greater than the external atmospheric pressure, and the airbag 40 is raised on both sides of the bed board 20, so that it can have an anti-pinch detection function, and the airbag 40 can play a role in supporting the user.

[0040] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 , the number of airbags 40 and pressure sensors 50 are both multiple, the multiple airbags 40 and the multiple pressure sensors 50 are connected one by one, and the multiple airbags 40 are arranged in sequence on the bed board 20. Specifically, in this embodiment, the number of airbags 40 and the pressure sensors 50 are both 4. By setting the number of airbags 40 and the pressure sensors 50 to be multiple, and the multiple airbags 40 are arranged in sequence on the bed board 20, the area of ​​the airbags 40 is relatively large, which can better support the user, and has a larger anti-pinch detection area, which can more accurately realize the anti-pinch function.

[0041] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 The airbag 40 is in the shape of a long strip, the length direction of the airbag 40 is parallel to the plane around which the bed board 20 is relative to the bed frame 10, and the arrangement direction of the multiple airbags 40 is perpendicular to the plane around which the bed board 20 is relative to the bed frame 10. In this way, the airbag 40 can provide uniform and large-area support for the user, thereby improving the user's comfort and facilitating further increasing the anti-pinch detection area.

[0042] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 , the controller 60 is used to receive the sensitivity adjustment instruction and set the trigger difference according to the sensitivity adjustment instruction, and the trigger difference is the difference between the first preset value and the air pressure value. This setting is so that the user can adjust the sensitivity of the anti-pinch function trigger and reduce the risk of false triggering or non-triggering of the anti-pinch function. It can be understood that the air pressure value of the airbag is a dynamic value, which will change during the user's use. For example, when a user with a smaller weight lies on the bed board 20, the load borne by the airbag 40 is smaller, and the air pressure value of the airbag 40 is smaller, while a user with a larger weight lies on the bed board 20, and the load borne by the airbag 40 is larger, so that the air pressure value of the airbag 40 is larger. When the airbag 40 switches to the detection mode, the controller 60 can record the current air pressure value of the airbag 40, and then calculate the first preset value (the first preset value is the sum of the current air pressure value and the trigger difference) according to the trigger difference. In the detection mode, when the controller 60 detects that the air pressure value of the airbag 40 exceeds the first preset value, it is determined that the user is clamped and a relevant response is made. Because of this, the setting of the trigger difference can better adapt to the anti-pinch detection in different usage situations, and the anti-pinch function has a wider applicability.

[0043] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 The anti-pinch electric bed 100 includes an air pressure regulator 70, which is connected to the airbag 40 and electrically connected to the controller 60. When the airbag 40 is in the execution mode, the controller 60 can control the air pressure regulator 70 to inflate and discharge air to the airbag 40 to adjust the air pressure value. Specifically, the air pressure regulator 70 is connected to the airbag 40 through the trachea 41, and the pressure sensor 50 is arranged on the trachea 41 to obtain the pressure value of the airbag 40 in real time. The pressure regulator 70 can be optionally an air valve. When the airbag 40 is in the execution mode, the user can send an adjustment instruction to the controller 60, and the air pressure regulator 70 controls the air pressure regulator 70 to inflate and discharge air to the airbag 40 according to the adjustment instruction to increase, decrease or maintain the pressure value of the airbag 40, so that the height and hardness of the airbag 40 can be adjusted to meet different needs.

[0044] In one embodiment of this implementation, please refer to Figure 1 to Figure 2 Before the airbag 40 switches to the detection mode, if the air pressure value is less than the second preset value, the controller 60 controls the air pressure regulator 70 to inflate the airbag 40 so that the air pressure value is greater than or equal to the second preset value. Figure 3When the anti-pinch electric bed 100 is in the initial state, the airbag 40 will be recessed relative to the second surface 203 of the bed board 20, and the detection surface 402 of the airbag 40 is difficult to contact the user's body, and the anti-pinch detection effect cannot be achieved. When the air pressure value of the airbag 40 is greater than or equal to the second preset value, please refer to Figure 5 When the anti-pinch electric bed 100 is in working state, the airbag 40 will protrude relative to the second surface 203 of the bed board 20, and the detection surface 402 of the airbag 40 can be fully exposed outside the bed board 20. The detection surface 402 of the airbag 40 can contact and collide with the user's body to increase the air pressure value of the airbag 40, thereby achieving the effect of anti-pinch detection.

[0045] It should be noted that the second preset value is the minimum air pressure at which the airbag 40 can perform anti-pinch detection. The airbag 40 needs to be convex relative to the second surface 203 of the bed board 20 in order to better collide with the user and trigger the collision anti-pinch function. If the air pressure value of the airbag 40 is less than the second preset value, the airbag 40 is concave relative to the second surface 203 of the bed board 20, and the detection surface 402 of the airbag 40 is difficult to contact and collide with the user, resulting in failure of the anti-pinch detection and the risk of the user being pinched.

[0046] It should be noted that, in the detection mode, the air pressure value of the airbag is greater than the second preset value, and the first preset value is equal to the sum of the air pressure value of the airbag 40 and the trigger difference, so that the first preset value is greater than the sum of the second preset value and the trigger difference.

[0047] In this embodiment, the deformation direction of the airbag 40 when inflated and deflated is parallel to the axial direction of the mounting hole 201, that is, when the airbag 40 is inflated, the size of the airbag 40 in the axial direction of the mounting hole 201 will increase until the airbag 40 can protrude relative to the bed board 20, and when the airbag 40 is deflated, the size of the airbag 40 in the axial direction of the mounting hole 201 will decrease until the airbag 40 can be recessed relative to the bed board 20.

[0048] In this embodiment, Figure 1 and Figure 2 As shown, the airbag 40 includes an upper unit, a middle unit and a lower unit which are stacked and connected in sequence, wherein the middle unit is snapped into the mounting hole 201 to complete the installation of the airbag 40 in the mounting hole 201. The top surface of the upper unit of the airbag 40 is the support surface 401, and the bottom surface of the lower unit of the airbag 40 is the detection surface 402. The air pressure regulator 70 is connected to the middle unit through the air pipe 41.

[0049] In one embodiment of this implementation, after the controller 60 controls the air pressure regulator 70 to inflate the airbag 40 so that the air pressure value is greater than or equal to the second preset value, the controller 60 controls the driving mechanism 30 to drive the bed board 20 to flip relative to the bed frame 10. In this way, the airbag 40 can trigger the anti-pinch detection function and then drive the bed board 20 to flip relative to the bed frame 10, which can ensure that the airbag 40 can detect the pinching situation in time, and the controller 60 controls the driving mechanism 30 to respond in time.

[0050] It should be noted that the needs of different users may be different. For example, some users want the airbag 40 to be softer. When using it, the controller 60 controls the air pressure regulator 70 to deflate the airbag 40 (the airbag 40 is in the execution mode at this time) so that the air pressure value is reduced to the hardness of the airbag 40 that meets the expectations. Then, when the user needs to adjust the opening and closing angle of the bed board 20 relative to the bed frame 10, for example, when the bed board 20 needs to be lowered, there may be a risk of pinching. At this time, if the air pressure value of the airbag 40 is less than the second preset value, the detection surface 402 of the airbag 40 is difficult to contact and collide with the user's body, which may cause the anti-pinch detection of the airbag 40 to fail, and the user may be pinched. In this embodiment, the controller 60 controls the air pressure regulator 70 to inflate the airbag 40 so that the air pressure value is greater than or equal to the second preset value, so that the airbag 40 can play the role of anti-pinch detection and prevent the user from being pinched.

[0051] In one embodiment of this implementation, please refer to Figure 1 and Figure 3 The driving mechanism 30 includes a motor 31 and a push rod 32. The motor 31 is installed on the bed frame 10. One end of the push rod 32 is connected to the motor 31, and the other end of the push rod 32 is connected to the bed board 20. The motor 31 can drive the push rod 32 to extend and retract. The motor 31 is electrically connected to the controller 60. Specifically, the push rod 32 is rotationally connected to the bed board 20. When it is detected that the hand is pinched, the controller 60 can send a corresponding signal to the motor 31 in time to control the motor 31 to stop driving or drive in the reverse direction.

[0052] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. An anti-pinch electric bed, characterized in that: include: bedstead; A bed board, rotatably connected to the bed frame; A driving mechanism connected to the bed board and capable of driving the bed board to flip relative to the bed frame; An air bag is provided through the bed board; A pressure sensor is connected to the airbag and can obtain the air pressure value of the airbag; The controller is electrically connected to the driving mechanism and the pressure sensor. The airbag has an execution mode and a detection mode. When the airbag is in the execution mode, the airbag is used to support the user. When the driving mechanism drives the bed board to flip relative to the bed frame in a folding direction, the airbag switches to the detection mode. If the air pressure value is greater than a first preset value, the controller controls the driving mechanism to drive the bed board in a preset manner.

2. The anti-pinch electric bed according to claim 1, characterized in that: The airbag comprises a supporting surface and a detecting surface, wherein the supporting surface faces away from the bed frame and the detecting surface faces the bed frame. The supporting surface is used to support the user. When the airbag is in the detecting mode, the detecting surface protrudes relative to the bed board.

3. The anti-pinch electric bed according to claim 1, characterized in that: The number of the airbags and the pressure sensors are both multiple, the multiple airbags and the multiple pressure sensors are connected one-to-one, and the multiple airbags are arranged on the bed board in sequence and at intervals.

4. The anti-pinch electric bed according to claim 3, characterized in that: The airbag is in the shape of an elongated strip, the length direction of the airbag is parallel to the plane around which the bed board is relative to the bed frame, and the arrangement direction of the plurality of airbags is perpendicular to the plane around which the bed board is relative to the bed frame.

5. The anti-pinch electric bed according to claim 1, characterized in that: The controller is used to receive a sensitivity adjustment instruction and set a trigger difference according to the sensitivity adjustment instruction, where the trigger difference is a difference between the first preset value and the air pressure value.

6. The anti-pinch electric bed according to claim 1, characterized in that: The anti-pinch electric bed includes an air pressure regulator, which is communicated with the airbag and electrically connected to the controller. When the airbag is in the execution mode, the controller can control the air pressure regulator to inflate and deflate the airbag to adjust the air pressure value.

7. The anti-pinch electric bed according to claim 6, characterized in that: Before the airbag switches to the detection mode, if the air pressure value is less than a second preset value, the controller controls the air pressure regulator to inflate the airbag so that the air pressure value is greater than or equal to the second preset value.

8. The anti-pinch electric bed according to claim 7, characterized in that: After the controller controls the air pressure regulator to inflate the airbag so that the air pressure value is greater than or equal to the second preset value, the controller controls the driving mechanism to drive the bed board to flip relative to the bed frame.

9. The anti-pinch electric bed according to claim 1, characterized in that: When the airbag is in the detection mode, if the air pressure value is greater than a first preset value, the controller controls the driving mechanism to stop driving the bed board, or drives the bed board to flip relative to the bed frame along the unfolding direction.

10. The anti-pinch electric bed according to claim 1, characterized in that: The driving mechanism includes a motor and a push rod. The motor is installed on the bed frame. One end of the push rod is connected to the motor, and the other end of the push rod is connected to the bed board. The motor can drive the push rod to extend and retract, and the motor is electrically connected to the controller.

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