Anti-pinch electric bed using photoelectric sensors

Abstract

This utility model belongs to the field of electric bed technology, specifically relating to an anti-pinch electric bed. Addressing the deficiency of existing electric beds with soft frames lacking a reliable anti-pinch structure, this utility model adopts the following technical solution: an anti-pinch electric bed using photoelectric sensors includes: a soft bed frame; a bed support; a bed board, comprising multiple sub-bed boards, at least some of which are foldable; an electric folding device driving the folding of at least some of the sub-bed boards; a controller controlling the electric folding device; and a detection device including contact sensors located on the edges of the lower surfaces of each movable sub-bed board, connected to the controller. When a contact sensor is triggered, the controller controls the electric folding device to stop or reverse its movement. In this utility model's anti-pinch electric bed, a limb or clothing will trigger the contact sensors of the detection device, which then send a signal to the controller, causing the controller to stop the electric folding device from descending or ascending.

Description

Technical Field

[0001] This utility model belongs to the field of electric bed technology, specifically relating to an anti-pinch electric bed using photoelectric sensors. Background Technology

[0002] Existing electric beds pose a risk of injury if a person or foreign object accidentally enters the gap between the bed frame and the bed board during operation of their lifting or folding mechanisms.

[0003] Traditional anti-pinch solutions often use pressure sensors or mechanical limit switches, the length of which must be custom-made according to the size of the bed board. Furthermore, their sensitivity is relatively low.

[0004] Furthermore, some existing electric beds include a soft bed frame, a bed support, and a bed board, with the soft bed frame enclosing the bed support and bed board. Currently, there is no anti-pinch structure for this type of electric bed. Summary of the Invention

[0005] This invention addresses the shortcomings of existing electric beds that lack reliable anti-pinch structures or require customized anti-pinch structures based on bed board dimensions. It provides an anti-pinch electric bed based on a diffuse reflection photoelectric sensor. Through an adjustable photoelectric sensor and control circuit, the detection distance is dynamically adapted to the bed board dimensions, ensuring anti-pinch accuracy while improving applicability.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an anti-pinch electric bed using photoelectric sensors, wherein the anti-pinch electric bed using photoelectric sensors includes:

[0007] Bed rest;

[0008] A bed board, comprising multiple sub-bed boards, wherein at least some of the sub-bed boards are foldable;

[0009] An electric folding device drives at least part of the sub-bed panels to fold;

[0010] Controller, controls the electric folding device;

[0011] The diffuse reflection photoelectric sensor, connected to the controller, has multiple components and is located on the edge of the lower surface of each movable sub-bed plate. It includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance.

[0012] When the diffuse reflection photoelectric sensor is triggered, the controller controls the electric folding device to stop or reverse its movement.

[0013] This utility model discloses an anti-pinch electric bed using photoelectric sensors. The anti-pinch electric bed includes multiple diffuse reflection photoelectric sensors connected to a controller. The diffuse reflection photoelectric sensors are located on the lower surface edge of each movable sub-bed board. Each diffuse reflection photoelectric sensor includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance. The detection distance can be adjusted by the potentiometer to accommodate different sizes. The diffuse reflection photoelectric sensors detect whether there is a limb or object on the edge of the bed board. When the diffuse reflection photoelectric sensor is triggered, the controller controls the electric folding device to stop or reverse its movement, reliably preventing pinching.

[0014] As an improvement, the bed board includes five sub-boards corresponding to the head and back, waist, hips, thighs and calves. The three sub-boards corresponding to the head and back, thighs and calves are foldable and equipped with diffuse reflection photoelectric sensors.

[0015] As an improvement, there are three diffuse reflection photoelectric sensors on the head and back sub-bed board, and the three beams of light emitted by them are in a U-shape.

[0016] There are two diffuse reflection photoelectric sensors on the thigh bed board, each emitting two parallel beams of light.

[0017] There are three diffuse reflection photoelectric sensors on the sub-bed board at the lower leg, and the three beams of light emitted by them are in a U-shape.

[0018] As an improvement, the three diffuse reflection photoelectric sensors on the head and back sub-bed are all located at the ends of the anti-pinch electric bed along its length.

[0019] The two diffuse reflection photoelectric sensors on the thigh sub-bed are located at the end of the anti-pinch electric bed near the foot of the bed along its length.

[0020] The three diffuse reflection photoelectric sensors on the lower leg sub-bed are all located at the ends of the anti-pinch electric bed along its length.

[0021] As an improvement, each diffuse reflection photoelectric sensor sends a signal to the controller.

[0022] As an improvement, the distance between the light emitted by the diffuse reflection photoelectric sensor and the side of the bed board is less than or equal to 60mm.

[0023] As an improvement, in one of the three diffuse reflection photoelectric sensors on the back of the head, the distance between the beam width direction of one of the adjacent pairs is 30mm from the head end of the sub-bed plate and 50mm from the side of the sub-bed plate; the distance between the beam length direction of the other pair is 50mm from the head end of the sub-bed plate and 30mm from the side of the sub-bed plate; and in another, the distance between the isolated diffuse reflection photoelectric sensor and the head end of the sub-bed plate is 50mm from both the head end and the side of the sub-bed plate; and / or,

[0024] The two reflective photoelectric sensors on the thigh are 30mm away from the movable end of the thigh sub-bed board and 50mm away from the side of the thigh sub-bed board; and / or,

[0025] The three reflective photoelectric sensors on the lower legs are arranged at the same or symmetrical distances as the three diffuse reflective photoelectric sensors on the back of the head.

[0026] As an improvement, the light emitted by the diffuse reflection photoelectric sensor is parallel to the bed board.

[0027] As an improvement, the anti-pinch electric bed includes two single electric bed frames, each equipped with five diffuse reflection photoelectric sensors. Two of the five diffuse reflection photoelectric sensors are located at the back of the head, one at the thigh, and two at the calves.

[0028] As an improvement, all diffuse reflection photoelectric sensors are identical, thereby reducing the number of parts.

[0029] As an improvement, the anti-pinch electric bed using photoelectric sensors also includes a lifting device that drives the entire bed board to rise, and the light emitted by all diffuse reflection photoelectric sensors is distributed in a square shape.

[0030] As an improvement, the lumbar and hip sub-bed boards on the same side share a single diffuse reflection photoelectric sensor.

[0031] As an improvement, the anti-pinch electric bed using photoelectric sensors also includes a soft bed frame that surrounds the bed support and bed board.

[0032] The beneficial effects of this utility model of an anti-pinch electric bed using photoelectric sensors are as follows: It includes multiple diffuse reflection photoelectric sensors connected to a controller. The diffuse reflection photoelectric sensors are located on the edge of the lower surface of each movable sub-bed board. The diffuse reflection photoelectric sensor includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance. The detection distance can be adjusted by the potentiometer to adapt to different sizes. The diffuse reflection photoelectric sensor detects whether there is a limb or object on the edge of the bed board. When the diffuse reflection photoelectric sensor is triggered, the controller controls the electric folding device to stop or reverse its movement, thus reliably preventing pinching. Attached Figure Description

[0033] Figure 1 and Figure 2 This is a schematic diagram of the anti-pinch electric bed using a photoelectric sensor at different angles according to Embodiment 1 of this utility model (the soft bed frame is not shown, and the bed board is not folded).

[0034] Figure 3 This is a light distribution diagram (bed board not folded) of the diffuse reflection photoelectric sensor emitted by the anti-pinch electric bed using a photoelectric sensor according to Embodiment 1 of this utility model.

[0035] Figure 4 and Figure 5 This is a schematic diagram of the anti-pinch electric bed using a photoelectric sensor at different angles according to Embodiment 1 of this utility model (the soft bed frame is not shown, and the bed board is folded).

[0036] Figure 6 This is a light distribution diagram (after the bed board is folded) of the diffuse reflection photoelectric sensor emitted by the anti-pinch electric bed using a photoelectric sensor according to Embodiment 1 of this utility model.

[0037] Figure 7 This is an exploded view of the structure of the anti-pinch electric bed using a photoelectric sensor according to Embodiment 1 of this utility model (the mattress is also shown).

[0038] In the picture, 1. Bed support;

[0039] 2. Bed board; 21. Head and back bed board; 22. Waist bed board; 23. Hip bed board; 24. Thigh bed board; 25. Lower leg bed board;

[0040] 3. Electric folding device;

[0041] 4. Diffuse reflection photoelectric sensor;

[0042] 5. Soft bed frame;

[0043] 6. Mattress. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be explained and described below. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0045] See Figures 1 to 7 The present invention relates to an anti-pinch electric bed using a photoelectric sensor, wherein the anti-pinch electric bed using a photoelectric sensor includes:

[0046] Bed rest;

[0047] A bed board, comprising multiple sub-bed boards, wherein at least some of the sub-bed boards are foldable;

[0048] An electric folding device drives at least part of the sub-bed panels to fold;

[0049] Controller, controls the electric folding device;

[0050] The diffuse reflection photoelectric sensor, connected to the controller, has multiple components and is located on the edge of the lower surface of each movable sub-bed plate. It includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance.

[0051] When the diffuse reflection photoelectric sensor is triggered, the controller controls the electric folding device to stop or reverse its movement.

[0052] This utility model discloses an anti-pinch electric bed using photoelectric sensors. The anti-pinch electric bed includes multiple diffuse reflection photoelectric sensors connected to a controller. The diffuse reflection photoelectric sensors are located on the lower surface edge of each movable sub-bed board. Each diffuse reflection photoelectric sensor includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance. The detection distance can be adjusted by the potentiometer to accommodate different sizes. The diffuse reflection photoelectric sensors detect whether there is a limb or object on the edge of the bed board. When the diffuse reflection photoelectric sensor is triggered, the controller controls the electric folding device to stop or reverse its movement, reliably preventing pinching.

[0053] Example 1

[0054] See Figures 1 to 7 The present invention relates to an anti-pinch electric bed adapted to different bed board 2 sizes, comprising:

[0055] Bed support 1;

[0056] Bed board 2, comprising multiple sub-bed boards 2, wherein at least some of the sub-bed boards 2 are foldable;

[0057] Electric folding device 3 drives at least part of the sub-bed board 2 to fold;

[0058] Controller, controls the electric folding device 3;

[0059] The diffuse reflection photoelectric sensor 4, connected to the controller, has multiple components and is respectively located on the edge of the lower surface of each movable sub-bed plate 2. It includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance.

[0060] When the diffuse reflection photoelectric sensor 4 is triggered, the controller controls the electric folding device 3 to stop or reverse its operation.

[0061] In this embodiment, the diffuse reflection photoelectric sensor 4 is a prior art technology.

[0062] In this embodiment, the bed board 2 includes five sub-bed boards: a head and back sub-bed board 21, a waist sub-bed board 22, a buttocks sub-bed board 23, a thigh sub-bed board 24, and a calf sub-bed board 25. The head and back sub-bed board 21, the thigh sub-bed board 24, and the calf sub-bed board 25 are foldable and equipped with diffuse reflection photoelectric sensors 4. The waist sub-bed board 22 and the buttocks sub-bed board 23 are not foldable.

[0063] In this embodiment, there are three diffuse reflection photoelectric sensors 4 on the head and back sub-bed board 21, and the three beams of light emitted by them are U-shaped as a whole.

[0064] In this embodiment, there are two diffuse reflection photoelectric sensors 4 on the thigh bed board 24, which emit two parallel beams of light.

[0065] In this embodiment, there are three diffuse reflection photoelectric sensors 4 on the lower leg sub-bed board 25, and the three beams of light emitted by them are U-shaped as a whole.

[0066] In this embodiment, the three diffuse reflection photoelectric sensors 4 on the head and back sub-bed board 21 are all located at the ends of the anti-pinch electric bed along its length.

[0067] In this embodiment, the two diffuse reflection photoelectric sensors 4 on the thigh sub-bed board 24 are both located near the end of the anti-pinch electric bed along its length.

[0068] In this embodiment, the three diffuse reflection photoelectric sensors 4 on the lower leg sub-bed board 25 are all located at the ends of the anti-pinch electric bed along its length.

[0069] In this embodiment, each diffuse reflection photoelectric sensor 4 sends a signal to the controller. The controller can determine the specific location of the problem based on the source of the signal, that is, which of the eight edges of the three sub-bed boards 2 is the problem.

[0070] In this embodiment, the anti-pinch electric bed may also include an operation display screen, or the anti-pinch electric bed may also be connected to a smart terminal such as a mobile phone via wired or wireless connection.

[0071] In this embodiment, the controller of the anti-pinch electric bed includes two controllers, a main controller and a backup controller, which support a dual-controller redundancy design. When the main controller fails, the backup controller takes over, further improving safety.

[0072] In this embodiment, the system automatically detects the integrity of the touch edge when it starts up, and alarms are triggered via mobile APP or display screen after a damaged or malfunctioning area is detected.

[0073] In this embodiment, when the contact sensor detects a dangerous contact signal, the control unit sends an emergency braking command within 10ms to cut off the power supply to the motor of the electric folding device 3 or drive the motor to move in the opposite direction; and simultaneously triggers the audible and visual alarm device to remind the user to eliminate the danger.

[0074] In this embodiment, the distance between the light emitted by the diffuse reflection photoelectric sensor 4 and the side of the bed board 2 is less than or equal to 60 mm. In the figure, the dashed arrow represents the light emitted by the diffuse reflection photoelectric sensor 4.

[0075] See Figure 3In this embodiment, among the three diffuse reflection photoelectric sensors 4 on the back of the head, one of the adjacent pairs of light rays emitted in the width direction is 30mm away from the head end of the head-back sub-bed plate 21 and 50mm away from the side of the head-back sub-bed plate 21; the other pair of light rays emitted in the length direction is 50mm away from the head end of the head-back sub-bed plate 21 and 30mm away from the side of the head-back sub-bed plate 21. The isolated one of the three diffuse reflection photoelectric sensors 4 on the back of the head is 50mm away from the head end of the head-back sub-bed plate 21 and 50mm away from the side of the head-back sub-bed plate 21; and / or,

[0076] The two reflective photoelectric sensors 4 on the thigh are 30mm away from the movable end of the thigh sub-bed 24 and 50mm away from the side of the thigh sub-bed 24; and / or,

[0077] The arrangement distance of the three reflective photoelectric sensors 4 on the lower leg is consistent with the arrangement distance of the three diffuse reflective photoelectric sensors 4 on the head and back. Specifically, for the two adjacent diffuse reflective photoelectric sensors 4 on the lower leg, the distance from the width direction of one of the light rays emitted is 30mm to the tail end of the lower leg sub-bed 25 and 50mm to the side of the lower leg sub-bed 25; the distance from the length direction of the other light ray is 50mm to the tail end of the lower leg sub-bed 25 and 30mm to the side of the lower leg sub-bed 25. For the isolated diffuse reflective photoelectric sensor 4 on the lower leg, the distance from the tail end of the lower leg sub-bed 25 is 50mm, and the distance from the side of the lower leg sub-bed 25 is 50mm. The diffuse reflective photoelectric sensor 4 includes an opening mounting part and a main body. The opening mounting part has two mounting holes. The measurement reference point for the distance between the diffuse reflective photoelectric sensor 4 and the bed 2 is the point where the common perpendicular line of the two mounting holes coincides with the intersection line of the opening part and the main body (the measurement reference point can also be selected at other locations). The common perpendicular line of the two mounting holes is a line perpendicular to the line connecting the center lines of the two holes. This arrangement allows the line emitted by the diffuse reflection photoelectric sensor 4 to be at an appropriate distance from the edge of the bed board 2, neither too far away to reduce the protective capability nor too close to easily cause false triggering. Furthermore, the diffuse reflection photoelectric sensor 4 does not protrude from the bed board 2 (the diffuse reflection photoelectric sensor 4 has a certain planar dimension).

[0078] In this embodiment, the light emitted by the diffuse reflection photoelectric sensor 4 is parallel to the bed board 2.

[0079] In this embodiment, all diffuse reflection photoelectric sensors 4 are identical, thereby reducing the number of parts.

[0080] In this embodiment, the anti-pinch electric bed that adapts to different bed board 2 sizes also includes a soft bed frame 5, which surrounds the bed support 1 and the bed board 2.

[0081] In other embodiments, the anti-pinch electric bed includes two single electric bed frames, on which five diffuse reflection photoelectric sensors 4 are installed. Two of the five diffuse reflection photoelectric sensors 4 are located at the back of the head, one at the thigh, and two at the calves.

[0082] In other embodiments, the anti-pinch electric bed adaptable to different bed board 2 sizes also includes a lifting device that drives the entire bed board 2 to rise, and the light emitted by all diffuse reflection photoelectric sensors 4 is distributed in a square shape. The lumbar and hip sub-bed boards 232 on the same side share a single diffuse reflection photoelectric sensor 4.

[0083] The beneficial effects of the anti-pinch electric bed of the present invention, which adapts to different bed board 2 sizes, according to Embodiment 1 are as follows: It includes multiple diffuse reflection photoelectric sensors 4 connected to the controller. The diffuse reflection photoelectric sensors 4 are located on the edge of the lower surface of each movable sub-bed board 2. The diffuse reflection photoelectric sensor 4 includes a transmitter, a receiver, and a potentiometer for adjusting the detection distance. The detection distance can be adjusted by the potentiometer to adapt to different sizes. The diffuse reflection photoelectric sensor 4 detects whether a limb or object has entered between the bed board 2 and the soft bed frame 5. When the diffuse reflection photoelectric sensor 4 is triggered, the controller controls the electric folding device 3 to stop or reverse its movement, thus reliably preventing pinching. Compared with contact sensors, the diffuse reflection photoelectric sensor 4 can not only prevent the human body from being pinched, but also prevent clothing and other flexible objects from being pinched, or in other words, it is more effective in preventing clothing and other flexible objects from being pinched.

[0084] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. An anti-pinch electric bed employing a photoelectric sensor, characterized by: The anti-pinch electric bed using photoelectric sensors includes: Bed support (1); Bed board (2), comprising multiple sub-bed boards, wherein at least some of the sub-bed boards are foldable; An electric folding device (3) drives at least part of the sub-bed panels to fold; Controller, controls the electric folding device (3); The diffuse reflection photoelectric sensor (4), connected to the controller, has multiple sensors and is located on the edge of the lower surface of each movable sub-bed plate, including a transmitter, a receiver, and a potentiometer for adjusting the detection distance; When the diffuse reflection photoelectric sensor (4) is triggered, the controller controls the electric folding device (3) to stop or reverse its action.

2. The anti-pinch electric bed employing an optical-electric sensor according to claim 1, characterized by: The bed board (2) includes five sub-bed boards corresponding to the head and back, waist, buttocks, thighs and calves. The three sub-bed boards corresponding to the head and back, thighs and calves are foldable and equipped with diffuse reflection photoelectric sensors (4).

3. The anti-pinch electric bed employing a photosensor according to claim 2, characterized by: There are three diffuse reflection photoelectric sensors (4) on the head and back sub-bed board (21), and the three beams of light emitted by them are U-shaped as a whole; The diffuse reflection photoelectric sensor (4) on the thigh sub-bed board (24) has two parallel light rays emitted by it; There are three diffuse reflection photoelectric sensors (4) on the lower leg sub-bed board (25), and the three beams of light emitted by them are U-shaped as a whole.

4. The anti-pinch electric bed with photoelectric sensor according to claim 2, characterized in that: The diffuse reflection photoelectric sensors (4) on the head and back sub-bed board (21) are all located at the ends of the anti-pinch electric bed along its length. The diffuse reflection photoelectric sensors (4) on the thigh sub-bed board (24) are all located at the end of the anti-pinch electric bed near the foot of the bed along the length direction; The diffuse reflection photoelectric sensors (4) on the lower leg sub-bed board (25) are all located at the ends of the anti-pinch electric bed along its length.

5. The anti-pinch electric bed with photoelectric sensor according to claim 2, characterized in that: The anti-pinch electric bed includes two single electric bed frames, on which five diffuse reflection photoelectric sensors (4) are installed. Two of the five diffuse reflection photoelectric sensors (4) are located at the head and back, one at the thigh, and two at the calves.

6. The anti-pinch electric bed with photoelectric sensor according to claim 3, characterized in that: The distance between the diffuse reflection photoelectric sensor (4) and the side of the bed board (2) is less than or equal to 60 mm.

7. The anti-pinch electric bed employing an optical sensor according to claim 6, characterized by: Of the three diffuse reflection photoelectric sensors (4) on the back of the head, one of the two adjacent light rays emitted in the width direction is 30 mm from the head end of the sub-bed plate (21) on the back of the head and 50 mm from the side of the sub-bed plate (21) on the back of the head; the other light ray emitted in the length direction is 50 mm from the head end of the sub-bed plate (21) on the back of the head and 30 mm from the side of the sub-bed plate (21) on the back of the head; and the isolated one of the three diffuse reflection photoelectric sensors (4) on the back of the head is 50 mm from the head end of the sub-bed plate (21) on the back of the head and 50 mm from the side of the sub-bed plate (21) on the back of the head; and / or, The two reflective photoelectric sensors (4) on the thigh are 30 mm away from the movable end of the thigh sub-bed board (24) and 50 mm away from the side of the thigh sub-bed board (24); and / or, The arrangement distance of the three reflective photoelectric sensors (4) on the lower leg is consistent with or symmetrical to the arrangement distance of the three diffuse reflective photoelectric sensors (4) on the back of the head.

8. The anti-pinch electric bed with photoelectric sensor according to claim 1, characterized in that: Each diffuse reflection photoelectric sensor (4) sends a signal to the controller.

9. The anti-pinch electric bed employing an optical sensor according to claim 1, characterized by: Each diffuse reflection photoelectric sensor (4) is identical; and / or, The light emitted by the diffuse reflection photoelectric sensor (4) is parallel to the bed board (2).

10. The anti-pinch electric bed using a photoelectric sensor according to claim 1, characterized in that: The anti-pinch electric bed using photoelectric sensors also includes a lifting device that drives the bed board (2) to rise as a whole, and the light emitted by all diffuse reflection photoelectric sensors (4) is distributed in a square shape; and / or, The anti-pinch electric bed using photoelectric sensors also includes a soft bed frame (5), which surrounds the bed support (1) and the bed board (2).

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