Anti-pinch bed frame and bed body

Abstract

The application provides a bed frame and a bed body, and relates to the technical field of intelligent furniture.The bed frame comprises a bottom support frame, a back lifting frame assembly and a leg lifting frame assembly, the back lifting frame assembly is hinged at one end of the bottom support frame, the leg lifting frame assembly is hinged at the other end of the bottom support frame, and the bed frame further comprises a back connecting rod mechanism, a back alarm mechanism, a leg connecting rod mechanism and a leg alarm mechanism.The back connecting rod mechanism is arranged between the back lifting frame assembly and the bottom support frame, the leg connecting rod mechanism is arranged between the leg lifting frame assembly and the bottom support frame, the back alarm mechanism is arranged on the back connecting rod mechanism, and the leg alarm mechanism is arranged on the leg connecting rod mechanism.Based on the technical scheme of the application, the back connecting rod mechanism, the back alarm mechanism, the leg connecting rod mechanism and the leg alarm mechanism are added, so that the foreign matter entering the anti-pinch bed frame can be accurately alarmed at different folding angles of the anti-pinch bed frame, and the stability and structural reliability of the iron frame structure can be further improved.

Description

Technical Field

[0001] This invention relates to the field of smart furniture technology, and in particular to an anti-pinch bed frame and bed body. Background Technology

[0002] Smart beds typically use electrically adjustable bed frames. The most basic functions of a smart bed are backrest and legrest height adjustment. Currently, bed frames on the market use headrest and legrest drive mechanisms to move the metal frame, which in turn moves the bed board and mattress, allowing for raising and lowering at certain angles.

[0003] However, when the head and legs of the electric bed frame are raised, a large space is created at the bottom of the frame, which can easily trap pets and children. When the head and legs lower, these individuals could get caught, posing a safety hazard. Currently, most electric or smart beds on the market do not have an automatic anti-pinch function, primarily due to the high cost and difficulty of implementation. Additionally, existing patented technologies are as follows:

[0004] Patent publication number CN213188872U, entitled "Anti-Pinch Electric Bed," discloses the following: An anti-pinch electric bed includes a bed frame, a movable bed board, and a controller. A linear drive assembly connects the movable bed board and the bed frame to switch the movable bed board between a lying and raised state. The linear drive assembly is connected to the controller. The bed frame includes a bed frame for supporting the movable bed board. Multiple pressure sensors connected to the controller are located on the side of the bed frame facing the movable bed board. During the descent of the movable bed board, the controller controls the linear drive assembly based on the pressure signals detected by the pressure sensors to stop the movable bed board from descending. This invention uses pressure sensors to monitor in real time whether an object enters the gap between the movable bed board and the bed frame in the raised state. If an object is detected in the gap, the pressure sensor sends a signal to the controller, which then controls the linear drive assembly to stop the movable bed board from descending or to retract it upwards, preventing the movable bed board from pressing down on the object in the gap and ensuring the safety of the user and their belongings.

[0005] Patent CN210581800U, entitled "Anti-pinch Electric Bed with Combined Sensors," discloses the following: An anti-pinch electric bed with combined sensors. The electric bed consists of a bed frame and a height-adjustable bed board. An electric telescopic rod is installed on the bottom surface of the bed board, and the head and foot of the electric bed are raised and lowered by a control panel. A pyroelectric infrared sensor is fixedly installed inside the bed frame, and a capacitive sensor is installed inside the bed edge. When the bed board lowers, the pyroelectric and capacitive sensors monitor in real time. If a living organism enters the monitoring range of the bed frame or touches the bed edge, the sensors immediately transmit a signal to the control panel, which immediately stops the retraction of the electric telescopic rod, achieving a comprehensive anti-pinch effect and improving the safety performance of the device.

[0006] The technical solution of patent CN213188872U involves placing pressure sensors on the bed frame. When a child or pet enters behind the bed frame, the pressure sensor detects contact and pressure on the bed frame, triggering the anti-pinch function. However, this solution has a drawback: if a foreign object enters or leaves the bed without touching the bed frame, the anti-pinch function will not be triggered, posing a safety hazard. The technical solution of patent CN210581800U uses a combination of pressure sensors and pyroelectric infrared sensors. The combined use of pressure sensors can prevent foreign objects from entering under the bed without touching the bed frame, improving safety. However, pyroelectric infrared sensors are easily affected by ambient temperature, and the actual detection distance changes as the bed frame is folded and raised to different positions, thus affecting the detection accuracy and effectiveness. Therefore, both patents CN213188872U and CN210581800U suffer from inaccurate foreign object detection and low detection precision. Summary of the Invention

[0007] The purpose of this invention is to solve the technical problems of inaccurate foreign object detection and low detection accuracy in existing anti-pinch electric beds. This invention proposes a bed body and the bed body thereof.

[0008] To achieve the above objectives, the technical solution proposed by this invention is as follows:

[0009] The present invention provides an anti-pinch bed frame, including a bottom support frame, a back lifting frame assembly and a leg lifting frame assembly. The back lifting frame assembly is hinged to one end of the bottom support frame, and the leg lifting frame assembly is hinged to the other end of the bottom support frame. It also includes a back linkage mechanism, a back alarm mechanism, a leg linkage mechanism and a leg alarm mechanism.

[0010] The back linkage mechanism is located between the back lifting frame assembly and the bottom support frame to seal the space formed between the back lifting frame assembly and the bottom support frame after the back lifting frame assembly is raised. The back alarm mechanism is located on the back linkage mechanism to detect whether there are foreign objects in the space formed between the back lifting frame assembly and the bottom support frame after the back lifting frame assembly is raised. The leg linkage mechanism is located between the leg lifting frame assembly and the bottom support frame to seal the space formed between the leg lifting frame assembly and the bottom support frame after the leg lifting frame assembly is raised. The leg alarm mechanism is located on the leg linkage mechanism to detect whether there are foreign objects in the space formed between the leg lifting frame assembly and the bottom support frame after the leg lifting frame assembly is raised.

[0011] In one embodiment, the bottom support frame includes a back support frame and a leg support frame arranged side by side, the back support frame and the leg support frame being of the same height and horizontally arranged, and the back support frame and the leg support frame being fixedly connected.

[0012] Specifically, both the back support frame and the leg support frame are identical square frames, which are spliced ​​together to form the rectangular outline of the bed frame.

[0013] In one embodiment, the back lifting frame assembly includes a back lifting frame, one end of which is hinged to a back support frame, and the other end is rotated and lifted by a back drive mechanism disposed on the back support frame.

[0014] Specifically, the back drive mechanism drives the back lifting frame to rotate around the hinge point, thereby realizing the angle adjustment and lifting of the back lifting frame. The back drive mechanism is a telescopic drive mechanism, which is hinged to the back support frame and the back lifting frame respectively. The telescopic drive mechanism can be one of the telescopic cylinder, telescopic hydraulic cylinder or telescopic electric cylinder, or other drive mechanisms that can realize telescopic movement.

[0015] In one embodiment, the back linkage mechanism includes an inner back linkage assembly and an outer back linkage assembly. The inner back linkage assembly is located at the inner edge between the back lifting frame and the back support frame, and the outer back linkage assembly is located at the outer edge between the back lifting frame and the back support frame. Both the inner and outer back linkage assemblies are hinged to the back support frame and slidably connected to the back lifting frame. The inner and outer back linkage assemblies have the same structure.

[0016] Specifically, the inner and outer back connecting rod assemblies have the same structure, which facilitates mass production and reduces costs.

[0017] In one embodiment, the back alarm mechanism includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner back linkage assembly or the outer back linkage assembly, and the infrared receiver is disposed on the outer back linkage assembly or the inner back linkage assembly.

[0018] Specifically, the infrared receiver is positioned corresponding to the infrared generator and is used to receive the infrared signals emitted by the generator. The number of infrared generators and receivers is the same, or there can be multiple units in a one-to-one correspondence. The infrared generator emits infrared light, which is received by the receiver. When the light is blocked, an alarm is triggered. Infrared generators are installed on both sides of the intelligent anti-pinch bed frame. The drive mechanism, which moves up and down with the anti-pinch bed frame, interferes with the infrared alarm.

[0019] In one embodiment, the inner backrest link assembly includes an inner backrest slide groove assembly, a first inner backrest link, and a second inner backrest link. The inner backrest slide groove assembly is disposed on the inner side below the backrest lifting frame along the length of the bed frame. The front and rear sides of the inner backrest slide groove assembly are respectively provided with the first inner backrest slide groove and the second inner backrest slide groove along the length of the bed frame. One end of the first inner backrest link is hinged to the left end of the inner backrest support frame, and the other end of the first inner backrest link is slidably engaged in the first inner backrest slide groove. One end of the second inner backrest link is hinged to the right end of the inner backrest support frame, and the other end of the first inner backrest link is slidably engaged in the second inner backrest slide groove.

[0020] Specifically, after the back lifting frame rotates to a certain angle, the first link and the second link on the inner side of the back slide in opposite directions, forming a triangular support structure. This structure serves to support the back lifting frame, seal the space between the back lifting frame and the back support frame, and provide an installation location for the back alarm mechanism.

[0021] In one embodiment, the outer backrest link assembly includes an outer backrest slide groove assembly, a first outer backrest link, and a second outer backrest link. The outer backrest slide groove assembly is disposed on the outer side below the backrest lifting frame along the length of the bed frame. The front and rear sides of the outer backrest slide groove assembly are respectively provided with the first outer backrest slide groove and the second outer backrest slide groove along the length of the bed frame. One end of the first outer backrest link is hinged to the left end of the outer backrest support frame, and the other end of the first outer backrest link is slidably engaged in the first outer backrest slide groove. One end of the second outer backrest link is hinged to the right end of the outer backrest support frame, and the other end of the first outer backrest link is slidably engaged in the second outer backrest slide groove.

[0022] Specifically, after the back lifting frame rotates to a certain angle, the first and second links on the outer back slide in opposite directions, forming a triangular support structure. This structure supports the back lifting frame and also seals the space between the back lifting frame and the back support frame, increasing overall reliability and reducing the gap that appears on the outer side after the back is raised. It also provides an installation position for the back alarm mechanism.

[0023] The actual number of backrest links (outer or inner) and leg alarms (leg infrared alarms) can be determined based on the actual lifting space of the backrest lifting frame. Infrared generators and receivers are installed at corresponding positions on the inner or outer backrest links. For the same backrest link, an infrared generator or receiver is installed on one side, and the connection cable for the infrared alarm is installed on the other side. The cable is suspended at the rotation hinge point of the backrest link to prevent the connecting cable from being broken due to pulling during rotation.

[0024] In one embodiment, the leg linkage mechanism includes a leg connecting frame and a leg lifting frame;

[0025] One end of the leg connecting frame is hinged to the leg support frame, and the other end is rotated and raised through a leg drive mechanism set on the leg support frame;

[0026] One end of the leg lifting frame is hinged to the end of the leg connecting frame near the leg drive mechanism, and the other end is a free end. The bottom of the leg lifting frame is connected to the top of the leg linkage mechanism, and the bottom of the leg linkage mechanism is connected to the leg support frame.

[0027] In one embodiment, the leg linkage mechanism includes an inner leg linkage assembly and an outer leg linkage assembly. The inner leg linkage assembly is located at the inner edge between the leg lifting frame and the leg support frame, and the outer leg linkage assembly is located at the outer edge between the leg lifting frame and the leg support frame. Both the inner and outer leg linkage assemblies are movably connected to the leg support frame and to the leg lifting frame, and the inner and outer leg linkage assemblies have the same structure.

[0028] Specifically, the inner leg link assembly and the outer leg link assembly have the same structure, which facilitates mass production and reduces costs.

[0029] In one embodiment, the leg alarm mechanism includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner leg link assembly or the outer leg link assembly, and the infrared receiver is disposed on the outer leg link assembly or the inner leg link assembly.

[0030] Specifically, the infrared receiver is located in a position corresponding to the infrared generator and is used to receive the infrared signals emitted by the infrared generator. The number of infrared generators and infrared receivers is the same, and there can be multiple units in a one-to-one correspondence.

[0031] In one embodiment, the inner leg link assembly includes an inner leg first link, an inner leg second link, an inner leg third link, and an inner leg fourth link.

[0032] The lower end of the first connecting rod of the inner leg is hinged to the inner side of the leg support frame. A first inner guide groove is provided on the inner wall of the leg connecting frame along the length of the bed. The upper end of the first connecting rod of the inner leg is slidably connected in the first inner guide groove.

[0033] The lower end of the second link of the inner leg is hinged to the inner side of the leg support frame. A second inner guide groove is provided on the inner wall of the leg lifting frame along the length of the bed. The upper end of the second link of the inner leg is slidably connected in the second inner guide groove.

[0034] The lower end of the third link of the inner leg is hinged to the inner side of the leg support frame, and the upper end of the third link of the inner leg is hinged to the inner wall of the leg lifting frame.

[0035] The lower end of the fourth link of the inner leg is hinged to the inner side of the leg support frame. A third inner guide groove is provided on the inner wall of the leg lifting frame along the length of the bed. The upper end of the fourth link of the inner leg is slidably connected in the third inner guide groove.

[0036] Among them, the third link of the inner leg and the leg lifting frame are hinged by a pin, and the third link of the inner leg and the leg support frame are hinged by a pin; the second link and the fourth link of the inner leg have the same structure as the third link of the inner leg. The second link and the fourth link of the inner leg are hinged to the leg support frame by a pin, and the second link and the fourth link of the inner leg are connected to the leg lifting frame by a slider. At this time, the slider connection between the second link and the fourth link of the inner leg and the leg lifting frame is a virtual constraint in the motion of the mechanism. The normal working motion pair of the mechanism is the third link of the leg and the leg support frame connected by a pin.

[0037] When the leg lifting frame is raised, the leg connecting frame will also be raised. At this time, the inner gap between the leg connecting frame and the leg support frame can be made up by the inner leg first link. The inner leg first link is hinged to the leg support frame by a pin and slidably connected to the leg connecting frame by a slider, which is used to fill the gap on the front side at this position.

[0038] Specifically, the first, second, third, and fourth links of the inner leg not only support the leg lifting frame but also seal the space between the leg lifting frame and the leg support frame, increasing overall reliability and reducing the gap that appears on the inside after the leg lifting frame is raised. This prevents children, small animals, or other foreign objects from accidentally entering the bed frame and also provides a mounting location for the leg alarm. Furthermore, the number of links in the inner leg linkage assembly can be selected as needed; it doesn't necessarily have to be four, but can be multiple.

[0039] In one embodiment, the outer leg link assembly includes a first outer leg link, a second outer leg link, a third outer leg link, and a fourth outer leg link;

[0040] The lower end of the first connecting rod of the outer leg is hinged to the outside of the leg support frame. A first outer guide groove is provided on the outer wall of the leg connecting frame along the length of the bed. The upper end of the first connecting rod of the outer leg is slidably connected in the first outer guide groove.

[0041] The lower end of the second connecting rod of the outer leg is hinged to the outside of the leg support frame. A second outer guide groove is provided on the outer wall of the leg lifting frame along the length of the bed. The upper end of the second connecting rod of the outer leg is slidably connected in the second outer guide groove.

[0042] The lower end of the third link of the outer leg is hinged to the outside of the leg support frame, and the upper end of the third link of the outer leg is hinged to the outer wall of the leg lifting frame.

[0043] The lower end of the fourth link of the outer leg is hinged to the outside of the leg support frame. A third outer guide groove is provided on the outer wall of the leg lifting frame along the length of the bed. The upper end of the fourth link of the outer leg is slidably connected in the third outer guide groove.

[0044] Among them, the third link of the outer leg and the leg lifting frame are hinged by a pin, and the third link of the outer leg and the leg support frame are hinged by a pin; the second link and the fourth link of the outer leg have the same structure as the third link of the outer leg. The second link and the fourth link of the outer leg are hinged to the leg support frame by a pin, and the second link and the fourth link of the outer leg are connected to the leg lifting frame by a slider. At this time, the slider connection between the second link and the fourth link of the outer leg and the leg lifting frame is a virtual constraint in the motion of the mechanism. The normal working motion pair of the mechanism is the third link of the leg and the leg support frame hinged by a pin.

[0045] When the leg lifting frame is raised, the leg connecting frame will also be raised. At this time, the outer gap between the leg connecting frame and the leg support frame can be filled by the outer leg first link. The outer leg first link is hinged to the leg support frame by a pin and slidably connected to the leg connecting frame by a slider, which is used to fill the gap on the front side at this position.

[0046] Specifically, in this embodiment, the first, second, third, and fourth links of the outer leg not only support the leg lifting frame but also seal the space between the leg lifting frame and the leg support frame, increasing overall reliability while reducing the gap that appears on the outer side after the leg lifting frame is raised, preventing children, small animals, or other foreign objects from accidentally entering the bed frame. They also provide an installation location for the leg alarm.

[0047] The actual number of leg links (outer or inner) and leg alarms (leg infrared alarms) can be determined based on the actual lifting space of the leg lifting frame. Infrared generators and receivers are installed at corresponding positions on the inner or outer leg links. For the same leg link, an infrared generator or receiver is installed on one side of the leg link, and the connecting cable for the infrared alarm is installed on the other side. The cable is suspended at the rotation hinge point of the leg link to prevent the connecting cable from being broken due to pulling during rotation.

[0048] The present invention also provides a bed frame, including the bed frame described above.

[0049] The anti-pinch bed frame and bed body provided by the present invention have at least the following beneficial effects compared with the prior art:

[0050] The present invention discloses an anti-pinch bed frame and its bed body, which features a structural design for the intelligent bed backrest lifting frame assembly and leg lifting frame assembly, and adds a connecting rod mechanism and an infrared alarm. This enables the anti-pinch bed frame to accurately alarm against foreign objects entering the anti-pinch bed frame at different folding angles, and further increases the stability and structural reliability of the iron frame structure. Attached Figure Description

[0051] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0052] Figure 1 This is a structural schematic diagram of the bed frame in the raised state of the present invention;

[0053] Figure 2 yes Figure 1 A structural schematic diagram of the back lifting frame from a visual perspective;

[0054] Figure 3 yes Figure 1 A structural schematic diagram of the leg lifting frame from a visual perspective;

[0055] Figure 4 yes Figure 1 A schematic diagram of the bed frame before it is raised;

[0056] Figure 5 yes Figure 4 A view;

[0057] Figure 6 yes Figure 5 A structural diagram of the middle bed frame after it has been raised.

[0058] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0059] Figure label:

[0060] 10. Bottom support frame; 11. Back support frame; 12. Leg support frame; 20. Back linkage mechanism; 21. Inner back linkage assembly; 211. First inner back linkage; 212. Second inner back linkage; 213. Inner back slide assembly; 22. Outer back linkage assembly; 221. First outer back linkage; 222. Second outer back linkage; 223. Outer back slide assembly; 30. Back lifting frame; 40. Leg connecting frame; 50. Leg lifting... 60. Lowering frame; 61. Leg linkage mechanism; 62. Outer leg linkage assembly; 63. Outer leg first link; 64. Outer leg second link; 65. Outer leg third link; 66. Outer leg fourth link; 67. Inner leg linkage assembly; 68. Inner leg first link; 69. Inner leg second link; 60. Inner leg third link; 61. Inner leg fourth link; 72. Back alarm mechanism; 83. Leg alarm mechanism. Detailed Implementation

[0061] The invention will now be further described with reference to the accompanying drawings.

[0062] like Figure 1-6 As shown, an embodiment of the present invention provides an anti-pinch bed frame, including a bottom support frame 10, a back lifting frame 30 assembly and a leg lifting frame 50 assembly. The back lifting frame 30 assembly is hinged to one end of the bottom support frame 10, and the leg lifting frame 50 assembly is hinged to the other end of the bottom support frame 10. It also includes a back linkage mechanism 20, a back alarm mechanism 70, a leg linkage mechanism 60 and a leg alarm mechanism 80.

[0063] The back linkage mechanism 20 is positioned between the back lifting frame 30 assembly and the bottom support frame 10 to seal the space formed between the back lifting frame 30 assembly and the bottom support frame 10 after the back lifting frame 30 assembly is raised. The back alarm mechanism 70 is positioned on the back linkage mechanism 20 to detect whether there are foreign objects in the space formed between the back lifting frame 30 assembly and the bottom support frame 10 after the back lifting frame 30 assembly is raised. The leg linkage mechanism 60 is positioned between the leg lifting frame 50 assembly and the bottom support frame 10 to seal the space formed between the leg lifting frame 50 assembly and the bottom support frame 10 after the leg lifting frame 50 assembly is raised. The leg alarm mechanism 80 is positioned on the leg linkage mechanism 60 to detect whether there are foreign objects in the space formed between the leg lifting frame 50 assembly and the bottom support frame 10 after the leg lifting frame 50 assembly is raised.

[0064] In one embodiment, the bottom support frame 10 includes a back support frame 11 and a leg support frame 12 arranged side by side. The back support frame 11 and the leg support frame 12 are at the same height and are arranged horizontally. The back support frame 11 and the leg support frame 12 are fixedly connected.

[0065] Specifically, the back support frame 11 and the leg support frame 12 are both square frames with the same structure, and the back support frame 11 and the leg support frame 12 are spliced ​​together to form the outer outline of a rectangular bed frame.

[0066] In one embodiment, the back lift frame 30 assembly includes a back lift frame 30, one end of which is hinged to a back support frame 11, and the other end is rotated and lifted by a back drive mechanism provided on the back support frame 11.

[0067] Specifically, the back drive mechanism drives the back lifting frame 30 to rotate around the hinge point, thereby realizing the angle adjustment and lifting of the back lifting frame 30. The back drive mechanism is a telescopic drive mechanism, which is hinged to the back support frame 11 and the back lifting frame 30 respectively. The telescopic drive mechanism can be one of a telescopic cylinder, a telescopic hydraulic cylinder or a telescopic electric cylinder, or other drive mechanisms that can realize telescopic movement.

[0068] In one embodiment, the back linkage mechanism 20 includes an inner back linkage assembly 21 and an outer back linkage assembly 22. The inner back linkage assembly 21 is located at the inner edge between the back lifting frame 30 and the back support frame 11, and the outer back linkage assembly 22 is located at the outer edge between the back lifting frame 30 and the back support frame 11. Both the inner back linkage assembly 21 and the outer back linkage assembly 22 are hinged to the back support frame 11, and both the inner back linkage assembly 21 and the outer back linkage assembly 22 are slidably connected to the back lifting frame 30. The inner back linkage assembly 21 and the outer back linkage assembly 22 have the same structure.

[0069] Specifically, the inner back link assembly 21 and the outer back link assembly 22 have the same structure, which facilitates mass production and reduces costs.

[0070] In one embodiment, the back alarm mechanism 70 includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner back linkage assembly 21 or the outer back linkage assembly 22, and the infrared receiver is disposed on the outer back linkage assembly 22 or the inner back linkage assembly 21.

[0071] Specifically, the infrared receiver is positioned corresponding to the infrared generator and is used to receive the infrared signals emitted by the generator. The number of infrared generators and receivers is the same, or there can be multiple units in a one-to-one correspondence. The infrared generator emits infrared light, which is received by the receiver. When the light is blocked, an alarm is triggered. Infrared generators are placed on both sides of the smart bed frame, and the drive mechanism, which moves up and down with the bed frame, may interfere with the infrared alarm.

[0072] In one embodiment, the inner backrest link assembly 21 includes an inner backrest slide groove assembly 213, an inner backrest first link 211, and an inner backrest second link 212. The inner backrest slide groove assembly 213 is disposed on the inner side below the backrest lifting frame 30 along the length of the bed frame. The inner backrest slide groove assembly 213 has an inner backrest first slide groove and an inner backrest second slide groove respectively disposed on the rear front side along the length of the bed frame. One end of the inner backrest first link 211 is hinged to the left end of the inner side of the backrest support frame 11, and the other end of the inner backrest first link 211 is slidably engaged in the inner backrest first slide groove. One end of the inner backrest second link 212 is hinged to the right end of the inner side of the backrest support frame 11, and the other end of the inner backrest first link 211 is slidably engaged in the inner backrest second slide groove.

[0073] Specifically, after the back lifting frame 30 rotates at a certain angle, the first link 211 and the second link 212 on the inner side of the back slide in opposite directions, forming a triangular support structure. This structure supports the back lifting frame 30, blocks the space between the back lifting frame 30 and the back support frame 11, and provides an installation position for the back alarm mechanism.

[0074] In one embodiment, the outer backrest link assembly 22 includes an outer backrest slide groove assembly 223, an outer backrest first link 221, and an outer backrest second link 222. The outer backrest slide groove assembly 223 is disposed on the outer side below the backrest lifting frame 30 along the length of the bed frame. The front and rear sides of the outer backrest slide groove assembly 223 are respectively provided with an outer backrest first slide groove and an outer backrest second slide groove along the length of the bed frame. One end of the outer backrest first link 221 is hinged to the left end of the outer backrest support frame 11, and the other end of the outer backrest first link 221 is slidably engaged in the outer backrest first slide groove. One end of the outer backrest second link 222 is hinged to the right end of the outer backrest support frame 11, and the other end of the inner backrest first link 211 is slidably engaged in the outer backrest second slide groove.

[0075] Specifically, after the back lifting frame 30 rotates at a certain angle, the first link 221 and the second link 222 on the outer side of the back slide in opposite directions, forming a triangular support structure. This structure supports the back lifting frame 30 and also blocks the space between the back lifting frame 30 and the back support frame 11, increasing overall reliability and reducing the gap that appears on the outer side after the back is raised. It also provides an installation position for the back alarm mechanism.

[0076] The actual number of back supports (outer or inner) and the actual number of leg alarms (leg infrared alarms) can be determined based on the actual lifting space of the back lifting frame 30. Infrared generators and receivers are installed at corresponding positions on the inner or outer back supports. For the same back support, an infrared generator or receiver is installed on one side of the back support, and the connecting wires for the infrared alarms are installed on the other side. The wiring at the rotation hinge point of the back support is suspended to prevent the connecting wires from being broken due to pulling during rotation of the back support.

[0077] In one embodiment, the leg linkage mechanism 60 includes a leg connecting frame 40 and a leg lifting frame 50;

[0078] One end of the leg connecting frame 40 is hinged to the leg support frame, and the other end is rotated and raised through a leg drive mechanism set on the leg support frame;

[0079] One end of the leg lifting frame 50 is hinged to the end of the leg connecting frame 40 near the connecting leg drive mechanism, and the other end is a free end. The bottom of the leg lifting frame 50 is connected to the top of the leg linkage mechanism 60, and the bottom of the leg linkage mechanism 60 is connected to the leg support frame.

[0080] In one embodiment, the leg linkage mechanism 60 includes an inner leg linkage assembly 62 and an outer leg linkage assembly. The inner leg linkage assembly 62 is located at the inner edge between the leg lifting frame 50 and the leg support frame, and the outer leg linkage assembly is located at the outer edge between the leg lifting frame 50 and the leg support frame. Both the inner leg linkage assembly 62 and the outer leg linkage assembly are movably connected to the leg support frame and to the leg lifting frame 50, and the inner leg linkage assembly 62 and the outer leg linkage assembly have the same structure.

[0081] Specifically, the inner leg link assembly 62 and the outer leg link assembly have the same structure, which facilitates mass production and reduces costs.

[0082] In one embodiment, the leg alarm mechanism 80 includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner leg link assembly 62 or the outer leg link assembly, and the infrared receiver is disposed on the outer leg link assembly or the inner leg link assembly 62.

[0083] Specifically, the infrared receiver is located in a position corresponding to the infrared generator and is used to receive the infrared signals emitted by the infrared generator. The number of infrared generators and infrared receivers is the same, and there can be multiple units in a one-to-one correspondence.

[0084] In one embodiment, the inner leg link assembly 62 includes an inner leg first link 621, an inner leg second link 622, an inner leg third link 623, and an inner leg fourth link 624.

[0085] The lower end of the first connecting rod 621 of the inner leg is hinged to the inner side of the leg support frame. A first inner guide groove is provided on the inner wall of the leg connecting frame 40 along the length of the bed. The upper end of the first connecting rod 621 of the inner leg is slidably connected in the first inner guide groove.

[0086] The lower end of the second connecting rod 622 of the inner leg is hinged to the inner side of the leg support frame. A second inner guide groove is provided on the inner wall of the leg lifting frame 50 along the length of the bed. The upper end of the second connecting rod 622 of the inner leg is slidably connected in the second inner guide groove.

[0087] The lower end of the third link 623 of the inner leg is hinged to the inner side of the leg support frame, and the upper end of the third link 623 of the inner leg is hinged to the inner wall of the leg lifting frame 50.

[0088] The lower end of the fourth link 624 of the inner leg is hinged to the inner side of the leg support frame. A third inner guide groove is provided on the inner wall of the leg lifting frame 50 along the length of the bed. The upper end of the fourth link 624 of the inner leg is slidably connected in the third inner guide groove.

[0089] Among them, the inner leg third link 623 and the leg lifting frame 50 are hinged by a pin, and the inner leg third link 623 and the leg support frame 12 are hinged by a pin; the inner leg second link 622 and the inner leg fourth link 624 have the same structure as the inner leg third link 623. The inner leg second link 622 and the inner leg fourth link 624 are hinged to the leg support frame by a pin, and the inner leg second link 622 and the inner leg fourth link 624 are connected to the leg lifting frame 50 by a slider. At this time, the inner leg second link 622 and the inner leg fourth link 624 are connected to the leg lifting frame 50 by a slider, which is a virtual constraint in the mechanism motion. The normal working mechanism motion pair is the leg third link and the leg support frame 12 hinged by a pin.

[0090] When the leg lifting frame 50 is raised, the leg connecting frame 40 will also be raised. At this time, the inner gap between the leg connecting frame 40 and the leg support frame 12 can be made up by the inner leg first link 621. The inner leg first link 621 is hinged to the leg support frame by a pin and slidably connected to the leg connecting frame 40 by a slider, which is used to fill the gap on the front side at this position.

[0091] Specifically, the first inner leg link 621, the second inner leg link 622, the third inner leg link 623, and the fourth inner leg link 624 not only support the leg lifting frame 50 but also seal the space between the leg lifting frame 50 and the leg support frame, increasing overall reliability while reducing the gap that appears on the inside after the leg lifting frame 50 is raised, preventing children, small animals, or other foreign objects from accidentally entering the bed frame. They also provide a mounting location for the leg alarm. Furthermore, the number of links in the inner leg link assembly 62 can be selected as needed; it is not necessarily four, but can be multiple.

[0092] In one embodiment, the outer leg link assembly includes an outer leg first link 611, an outer leg second link 612, an outer leg third link 613, and an outer leg fourth link 614.

[0093] The lower end of the first connecting rod 611 of the outer leg is hinged to the outside of the leg support frame. A first outer guide groove is provided on the outer wall of the leg connecting frame 40 along the length of the bed. The upper end of the first connecting rod 611 of the outer leg is slidably connected in the first outer guide groove.

[0094] The lower end of the second connecting rod 612 of the outer leg is hinged to the outside of the leg support frame. A second outer guide groove is provided on the outer wall of the leg lifting frame 50 along the length of the bed. The upper end of the second connecting rod 612 of the outer leg is slidably connected in the second outer guide groove.

[0095] The lower end of the third link 613 of the outer leg is hinged to the outside of the leg support frame, and the upper end of the third link 613 of the outer leg is hinged to the outer wall of the leg lifting frame 50.

[0096] The lower end of the fourth link 614 of the outer leg is hinged to the outside of the leg support frame. A third outer guide groove is provided on the outer wall of the leg lifting frame 50 along the length of the bed. The upper end of the fourth link 614 of the outer leg is slidably connected in the third outer guide groove.

[0097] Among them, the third link 613 of the outer leg and the leg lifting frame 50 are hinged by a pin, and the third link 613 of the outer leg and the leg support frame 12 are hinged by a pin; the second link 612 and the fourth link 614 of the outer leg have the same structure as the third link 613 of the outer leg. The second link 612 and the fourth link 614 of the outer leg are hinged to the leg support frame by a pin, and the second link 612 and the fourth link 614 of the outer leg are connected to the leg lifting frame 50 by a slider. At this time, the slider connection between the second link 612 and the fourth link 614 of the outer leg and the leg lifting frame 50 is a virtual constraint in the motion of the mechanism. The normal working motion pair of the mechanism is the third link of the leg and the leg support frame 12 hinged by a pin.

[0098] When the leg lifting frame 50 is raised, the leg connecting frame 40 will also be raised. At this time, the outer gap between the leg connecting frame 40 and the leg support frame 12 can be made up by the outer leg first link 611. The outer leg first link 611 is hinged to the leg support frame by a pin and slidably connected to the leg connecting frame 40 by a slider, which is used to fill the gap on the front side at this position.

[0099] Specifically, in this embodiment, the first link 611, the second link 612, the third link 613, and the fourth link 614 of the outer leg can not only support the leg lifting frame 50, but also seal the space formed between the leg lifting frame 50 and the leg support frame, increasing the overall reliability, reducing the gap that appears on the outside after the leg lifting frame 50 is raised, preventing children, small animals, or other foreign objects from accidentally entering the bed frame, and also providing an installation position for the leg alarm.

[0100] The actual number of leg links (outer or inner) and the actual number of leg alarms (leg infrared alarms) can be determined based on the actual lifting space of the leg lifting frame 50. Infrared generators and receivers are installed at corresponding positions on the inner or outer leg links. For the same leg link, an infrared generator or receiver is installed on one side of the leg link, and the connection cable for the infrared alarm is installed on the other side. The cable is suspended at the rotation hinge point of the leg link to prevent the connecting cable from being broken due to pulling during rotation.

[0101] Embodiments of the present invention also provide a bed frame, including the bed frame described above.

[0102] Both the back alarm mechanism 70 and the leg alarm mechanism 80 are infrared alarms, each including an external receiver and an infrared transmitter. For the same set of infrared receivers and transmitters, they need to be synchronized at the same height at all times to avoid the infrared receiver and transmitter being out of line due to the raising and lowering of the bed frame. However, in this scheme, the infrared transmitter emits infrared light from one side of the bed frame to the receiver on the other side of the bed frame. The drive mechanism (back drive mechanism or leg drive mechanism) arranged in the middle of the bed frame will block part of the infrared alarm from working, causing false triggering and stopping. Therefore, its control logic needs to be explained at this time.

[0103] First, when the leg lifting frame 50 is in different lifting positions, the drive mechanism is also at different lifting angles, which results in different levels of obstruction for different infrared alarms. Therefore, this section tests in advance the obstruction of the drive mechanism for different infrared receivers at different angles:

[0104] For example, when the drive mechanism is raised or lowered at 5 degrees, it will block the first pair of infrared receivers and the third pair of infrared receivers. This data will be fed back and recorded in the central control system.

[0105] When the drive mechanism actually descends to 5 degrees, the actual infrared reception at this position will be fed back to the central control unit. The central control unit will retrieve the infrared reception data at 5 degrees in the system and compare it with the data fed back by the actual infrared receiver at the current position. If the data match, it means that only the drive mechanism is obstructing this position. Obstruction of the drive mechanism is normal and allowed. The drive mechanism will work normally. If the data does not match, it means that there is other obstruction at this position, indicating that a foreign object has entered the bed frame. The drive mechanism will then stop working.

[0106] Secondly, the allowable working angle of a single drive mechanism, i.e. the angle at which the bed frame descends, is fixed, which can be 5 degrees or 3 degrees. This raises a question: the infrared alarm must provide high-frequency real-time feedback to effectively ensure the anti-pinch effect. Therefore, after the bed frame descends from position one to position two, the system checks again whether the data received by the infrared receiver matches the data in the central control system. Only if they match can the system continue to work. It should be noted here that the angle of a single descent of the drive mechanism is generally set to 3-5 degrees, which is a fixed design value.

[0107] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0108] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An anti-pinch bed frame, comprising a bottom support frame, a backrest lifting frame assembly, and a leg lifting frame assembly, wherein the backrest lifting frame assembly is hinged to one end of the bottom support frame, and the leg lifting frame assembly is hinged to the other end of the bottom support frame, characterized in that, Also includes: A back linkage mechanism is provided between the back lifting frame assembly and the bottom support frame to block the space formed between the back lifting frame assembly and the bottom support frame after the back lifting frame assembly is raised; A back alarm mechanism is installed on the back linkage mechanism to detect whether there are foreign objects in the space formed between the back lifting frame assembly and the bottom support frame after the back lifting frame assembly is raised. A leg linkage mechanism is provided between the leg lifting frame assembly and the bottom support frame to block the space formed between the leg lifting frame assembly and the bottom support frame after the leg lifting frame assembly is raised; as well as A leg alarm mechanism is installed on the leg linkage mechanism to detect whether there are foreign objects in the space formed between the leg lifting frame assembly and the bottom support frame after the leg lifting frame assembly is raised. The bottom support frame includes a back support frame and a leg support frame arranged side by side; The back linkage mechanism includes an inner back linkage assembly and an outer back linkage assembly. The inner back linkage assembly is located on the inner edge between the back lifting frame and the back support frame, and the outer back linkage assembly is located on the outer edge between the back lifting frame and the back support frame. The inner back link assembly includes: The back inner slide groove assembly is arranged on the inner side below the back lifting frame along the length direction of the anti-pinch bed frame. The back inner slide groove assembly is provided with a first back inner slide groove and a second back inner slide groove on the rear front side along the length direction of the anti-pinch bed frame. A first connecting rod on the inner side of the back, one end of which is hinged to the left end of the inner side of the back support frame, and the other end of the first connecting rod on the inner side of the back is slidably engaged in the first sliding groove on the inner side of the back; and The second connecting rod on the inner side of the back is hinged at one end to the right end of the inner side of the back support frame, and the other end of the first connecting rod on the inner side of the back is slidably engaged in the second sliding groove on the inner side of the back. After the back lifting frame rotates at a certain angle, the first link and the second link on the inner side of the back slide in opposite directions, forming a triangular support structure. The back outer link assembly includes: The back outer slide groove assembly is arranged on the outer side below the back lifting frame along the length direction of the anti-pinch bed frame. The front and rear sides of the back outer slide groove assembly are respectively provided with a back outer first slide groove and a back outer second slide groove along the length direction of the anti-pinch bed frame. A first connecting rod on the outer side of the back, one end of which is hinged to the left end of the outer side of the back support frame, and the other end of which is slidably engaged in the first sliding groove on the outer side of the back; and The second connecting rod on the outer side of the back is hinged at one end to the right end of the outer side of the back support frame, and the other end of the first connecting rod on the inner side of the back is slidably engaged in the second sliding groove on the outer side of the back. After the back lifting frame rotates at a certain angle, the first link on the outer side of the back and the second link on the outer side of the back slide in opposite directions, forming a triangular support structure. The leg linkage mechanism includes an inner leg linkage assembly and an outer leg linkage assembly. The inner leg linkage assembly is located at the inner edge between the leg lifting frame and the leg support frame, and the outer leg linkage assembly is located at the outer edge between the leg lifting frame and the leg support frame. The inner leg linkage assembly includes an inner leg first link, an inner leg second link, an inner leg third link, and an inner leg fourth link. The inner leg first link, the inner leg second link, the inner leg third link, and the inner leg fourth link can both support the leg lifting frame and seal the space formed between the leg lifting frame and the leg support frame. The outer leg linkage assembly includes an outer leg first link, an outer leg second link, an outer leg third link, and an outer leg fourth link. The outer leg first link, the outer leg second link, the outer leg third link, and the outer leg fourth link can both support the leg lifting frame and seal the space formed between the leg lifting frame and the leg support frame.

2. The anti-pinch bed frame according to claim 1, characterized in that, The back support frame and the leg support frame are at the same height and are horizontally arranged, and the back support frame and the leg support frame are fixedly connected.

3. The anti-pinch bed frame according to claim 2, characterized in that, The back lifting frame assembly includes a back lifting frame, one end of which is hinged to the back support frame, and the other end is rotated and lifted by a back drive mechanism provided on the back support frame.

4. The anti-pinch bed frame according to claim 3, characterized in that, The inner back connecting rod assembly and the outer back connecting rod assembly are both connected to the back support frame by hinges, and the inner back connecting rod assembly and the outer back connecting rod assembly are both connected to the back lifting frame by sliding. The inner back connecting rod assembly and the outer back connecting rod assembly have the same structure.

5. The anti-pinch bed frame according to claim 4, characterized in that, The rear alarm mechanism includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner rear linkage assembly or the outer rear linkage assembly, and the infrared receiver is disposed on the outer rear linkage assembly or the inner rear linkage assembly.

6. The anti-pinch bed frame according to any one of claims 2 to 5, characterized in that, The leg linkage mechanism includes: A leg connecting frame, one end of which is hinged to the leg support frame, and the other end which is rotated and raised via a leg drive mechanism mounted on the leg support frame; and The leg lifting frame has one end hinged to the end of the leg connecting frame near the end connected to the leg drive mechanism, and the other end is a free end. The bottom of the leg lifting frame is connected to the top of the leg linkage mechanism, and the bottom of the leg linkage mechanism is connected to the leg support frame.

7. The anti-pinch bed frame according to claim 6, characterized in that, The inner leg link assembly and the outer leg link assembly are both connected to the leg support frame via a movable connection. The inner leg link assembly and the outer leg link assembly are also connected to the leg lifting frame via a movable connection. The inner leg link assembly and the outer leg link assembly have the same structure.

8. The anti-pinch bed frame according to claim 7, characterized in that, The leg alarm mechanism includes an infrared generator and an infrared receiver corresponding to the infrared generator. The infrared generator is disposed on the inner leg linkage assembly or the outer leg linkage assembly, and the infrared receiver is disposed on the outer leg linkage assembly or the inner leg linkage assembly.

9. The anti-pinch bed frame according to claim 7, characterized in that, The inner leg linkage assembly includes: The lower end of the first connecting rod of the inner leg is hinged to the inner side of the leg support frame. A first inner guide groove is provided on the inner wall of the leg connecting frame along the length of the bed. The upper end of the first connecting rod of the inner leg is slidably connected in the first inner guide groove. The lower end of the second connecting rod of the inner leg is hinged to the inner side of the leg support frame. A second inner guide groove is provided on the inner wall of the leg lifting frame along the length of the bed. The upper end of the second connecting rod of the inner leg is slidably connected in the second inner guide groove. The lower end of the third link of the inner leg is hinged to the inner side of the leg support frame, and the upper end of the third link of the inner leg is hinged to the inner wall of the leg lifting frame; and The lower end of the fourth link of the inner leg is hinged to the inner side of the leg support frame. A third inner guide groove is provided on the inner wall of the leg lifting frame along the length of the bed. The upper end of the fourth link of the inner leg is slidably connected in the third inner guide groove.

10. The anti-pinch bed frame according to claim 7, characterized in that, The outer leg linkage assembly includes: The lower end of the first connecting rod of the outer leg is hinged to the outside of the leg support frame. A first outer guide groove is provided on the outer wall of the leg connecting frame along the length of the bed. The upper end of the first connecting rod of the outer leg is slidably connected in the first outer guide groove. The lower end of the second connecting rod of the outer leg is hinged to the outside of the leg support frame. A second outer guide groove is provided on the outer wall of the leg lifting frame along the length of the bed. The upper end of the second connecting rod of the outer leg is slidably connected in the second outer guide groove. The lower end of the third link of the outer leg is hinged to the outside of the leg support frame, and the upper end of the third link of the outer leg is hinged to the outer wall of the leg lifting frame; and The lower end of the fourth link of the outer leg is hinged to the outside of the leg support frame. A third outer guide groove is provided on the outer wall of the leg lifting frame along the length of the bed. The upper end of the fourth link of the outer leg is slidably connected in the third outer guide groove.

11. A bed frame, characterized in that, Includes the anti-pinch bed frame according to any one of claims 1 to 10.

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