A four-folding electric bed

Abstract

The present invention provides a four-fold electric bed, comprising: a base, a bed board and a flipping device, wherein the bed board is laid flat on the top of the base, and the flipping device is used to drive a part of the bed board to flip relative to the base; wherein the base comprises: a first frame, a second frame, a third frame and a fourth frame, and the first frame, the second frame, the third frame and the fourth frame are rotatably connected or detachably connected at the junction in sequence; the bed board comprises: a back board, a hip board, a leg board and a foot board; the back board, the hip board, the leg board and the foot board are respectively arranged on the top of the first frame, the second frame, the third frame and the fourth frame; the tail of the back board is hinged to the tail of the first frame, and the head of the leg board is hinged to the head of the third frame. The present invention reduces the size after folding through the four-folding design, meets the 130" UPS transportation standard, reduces transportation costs, and enhances market competitiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of electric beds, in particular to a four-folding electric bed. Background Art

[0002] In the US market, UPS shipping is divided into two standards: 165" and 130". The difference in freight is very large, about 400 yuan, and the profit margin is considerable. The calculation method of UPS packaging size is packaging length + 2* packaging width + 2* packaging height. The size of the most commonly used Queen size (1524x2032) bed after packaging is far from meeting the UPS requirements. At present, the electric beds that can be delivered on the market only meet the 165" UPS shipping standard, and there are no electric beds that meet the 130" UPS shipping standard. Customers are in urgent need of electric beds that can meet the 130" UPS shipping standard to further reduce transportation costs. Summary of the invention

[0003] The invention provides a four-folding electric bed to solve the technical problem that the prior art folding electric bed cannot meet the 130" UPS transportation standard.

[0004] To this end, the present invention provides a four-fold electric bed, which includes: a base, a bed board and a flipping device, wherein the bed board is laid flat on the top of the base, and the flipping device is used to drive a part of the bed board to flip relative to the base; wherein the base includes: a first frame, a second frame, a third frame and a fourth frame, and the first frame, the second frame, the third frame and the fourth frame are rotatably connected or detachably connected at the junction in sequence; the bed board includes: a back board, a buttocks board, a leg board and a foot board; the back board, the buttocks board, the leg board and the foot board are respectively arranged on the top of the first frame, the second frame, the third frame and the fourth frame; the tail of the back board is hinged to the tail of the first frame, and the head of the leg board is hinged to the head of the third frame.

[0005] Furthermore, the bed board also includes a head board, and the head board is rotatably connected or detachably connected to the back board at a junction.

[0006] Furthermore, the back panel further comprises: a limiting member, and the limiting member is used to limit the rotation of the head panel relative to the back panel.

[0007] Furthermore, the limiting member includes: at least one baffle, which is rotatably connected to the back panel; when the head panel is rotatable, the baffle is within the vertical projection of the back panel; when the head panel is not rotatable, the baffle is within the vertical projection of the back panel and the head panel at the same time.

[0008] Furthermore, the limiting member includes: at least one latch, which is provided on the back panel and can telescopically move relative to the head panel; when the head panel is rotatable, the latch is within the vertical projection of the back panel; when the head panel is not rotatable, the latch is within the vertical projections of the back panel and the head panel at the same time.

[0009] Furthermore, the second frame and the third frame are rotatably connected via a double-axis rotating member, and two ends of the double-axis rotating member are hinged to the second frame and the third frame respectively.

[0010] Furthermore, the dual-axis rotating member includes: a load-bearing portion and two extension portions; wherein the two extension portions extend in opposite directions with the load-bearing portion as the center, and the extension surfaces of the two extension portions are different; and the two extension portions are hinged to the second frame and the third frame respectively.

[0011] Furthermore, the hip plate and / or the leg plate are provided with openings matching the dual-axis rotating member.

[0012] Furthermore, a plurality of bed foot connection holes are provided at the head of the first frame, the tail of the second frame and the bottom of the load-bearing part.

[0013] Furthermore, it also includes: a concave-shaped reinforcement sheet, the two side walls of which are respectively fitted with the sides of the second frame and the third frame, and the reinforcement sheet is fitted with the bottom of the load-bearing part and is provided with a through hole matching the bed foot connection hole.

[0014] Furthermore, it is characterized in that the first frame can be placed in the space enclosed by the second frame, and the third frame can be placed in the space enclosed by the fourth frame.

[0015] Further, it is characterized in that the first frame and the second frame are rotatably connected via a first uniaxial rotating member, and the third frame and the fourth frame are rotatably connected via a second uniaxial rotating member; the two ends of the first uniaxial rotating member are respectively fixedly connected to the second frame and the third frame, and the two ends of the second uniaxial rotating member are respectively fixedly connected to the third frame and the fourth frame.

[0016] Furthermore, the first uniaxial rotating member and the second uniaxial rotating member both include: a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are hinged at an overlapping portion.

[0017] Furthermore, it also includes: a first reinforcing hoop and a second reinforcing hoop, the first reinforcing hoop is detachably connected to the second frame and the third frame, and the second reinforcing hoop is detachably connected to the third frame and the fourth frame.

[0018] Furthermore, the first reinforcing clamp and the second reinforcing clamp both include: an L-shaped rotating portion and a U-shaped clamping portion, the rotating portion and the clamping portion are fixedly connected, the rotating portion is rotatably connected to the base, and the rotating portion and the clamping portion are respectively engaged on the base.

[0019] Furthermore, the rotating portion and the clamping portion are integrally formed.

[0020] Furthermore, the flipping device is disposed between the bed board and the base, and is used for driving the back board and / or the leg board to flip relative to the base.

[0021] Furthermore, the flipping device includes: a first flipping device and a second flipping mechanism, the first flipping device is arranged between the back plate and the first frame, and the second flipping mechanism is arranged between the leg plate, the foot plate, the third frame and the fourth frame; wherein the first flipping device and the second flipping mechanism both include: two sliding rods, a flipping rod and a driving component; the two sliding rods are respectively arranged at the two ends of the flipping rod in an H-like shape; the middle part of the sliding rod protrudes toward the bed board in an obtuse V-shape, the head of the sliding rod is provided with a rotatable first roller, and the middle part of the sliding rod A rotatable second roller is provided at the base, and the tail of the sliding rod is hinged to the base; the flip rod is located between the middle of the sliding rod and the tail of the sliding rod; the two ends of the driving component are respectively hinged to the flip rod and the base, and the horizontal direction of the thrust of the driving component is the same as the horizontal direction from the first roller to the second roller; the horizontal direction from the first roller to the second roller points to the rotation axis of the flip device driving the bed board where they are located; the rotation axes of the first roller, the second roller, the sliding rod, the head board, the back board and the leg board are parallel to each other.

[0022] Furthermore, the lengths and positions of the gravity arm, the first resistance arm and the second resistance arm in the horizontal direction of the flipping device in the flat state are adjusted according to the following formulas (1) and (2) to reduce the length of the power arm in the vertical direction of each flipping device in the flat state:

[0023] F1=(G×L3)÷L1 (1);

[0024] L2>(F1×L4)÷F (2);

[0025] Wherein, L1 represents the first resistance arm, L2 represents the power arm, L3 represents the gravity arm, L4 represents the second resistance arm, G represents the weight of the bed board, F represents the thrust, and F1 represents the resistance;

[0026] Wherein, the first resistance arm is above the second resistance arm.

[0027] Furthermore, the back plate, the leg plate and the foot plate are all provided with hollow holes, and the hollow holes are located above the driving component.

[0028] Furthermore, the driving component is a linear push rod.

[0029] Furthermore, the linear push rod is of push-only type.

[0030] Furthermore, it also includes: a slide rail, which is arranged in the back plate and the leg plate and matches with the corresponding first roller and the second roller.

[0031] Furthermore, the slide rail includes: a U-shaped slide, the top edges of the two side walls of the slide extend in opposite directions to form a slide connection portion, the bed board is provided with a through hole, the slide is located in the through hole, and the slide connection portion is connected to the bottom surface of the bed board.

[0032] The invention reduces the size after folding through the four-folding design, meets the 130" UPS transportation standard, reduces transportation costs, and enhances market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 This is a schematic structural diagram of a four-folding electric bed in an incompletely folded state according to an embodiment of the present invention;

[0035] Figure 2 It is a side view of a changing state of a four-folding electric bed according to an embodiment of the present invention;

[0036] Figure 3 A bottom view of a four-folding electric bed according to an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of the folding structure of a four-folding electric bed according to an embodiment of the present invention;

[0038] Figure 5 A perspective view of part A of a four-folding electric bed in a folded state according to an embodiment of the present invention;

[0039] Figure 6 It is a schematic structural diagram of a four-folding electric bed in a semi-folded state according to an embodiment of the present invention;

[0040] Figure 7 This is an exploded view of part B in an embodiment of the present invention;

[0041] Figure 8 This is an exploded view of part C in an embodiment of the present invention;

[0042] Fig. 9 It is a partial enlarged view of the turning device in the embodiment of the present invention;

[0043] Fig.10 This is a schematic diagram of the lever arm of the flipping mechanism in an embodiment of the present invention;

[0044] Fig.11 It is an exploded view of part C in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 0a-header, 0b-tail;

[0047] 1-base, 11-first frame, 12-second frame, 13-third frame, 14-fourth frame;

[0048] 2-bed board, 21-head board, 22-back board, 23-hip board, 24-leg board, 25-foot board, 221-limiting piece;

[0049] 3-turning device, 3a-first turning device, 3b-second turning device, 31-sliding rod, 32-turning rod, 33-driving component, 311-first roller, 312-second roller;

[0050] 4-biaxial rotating part, 41-load bearing part, 42-extension part;

[0051] 5-Reinforcement sheet;

[0052] 6a-first connecting plate, 6b-second connecting plate;

[0053] 7a-first reinforcing hoop, 7b-second reinforcing hoop, 71-rotating part, 72-holding part;

[0054] 8-Hollow hole;

[0055] 9-slide rail, 91-slideway, 92-slideway connecting part. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0057] Figure 1 Schematic diagram of the structure of a four-folding electric bed in an incompletely folded state according to an embodiment of the present invention; Figure 2 A side view of a four-folding electric bed in a changing state according to an embodiment of the present invention; Figure 3 A bottom view of a four-folding electric bed according to an embodiment of the present invention; Figure 4FIG. 1 is a schematic diagram of a folding structure of a four-folding electric bed according to an embodiment of the present invention. Figures 1 to 4 As shown, the four-fold electric bed provided by the present invention includes: a base 1, a bed board 2 and a turning device 3, the bed board 2 is laid flat on the top of the base 1, and the turning device 3 is used to drive a part of the bed board 2 to turn relative to the base 1; wherein the base 1 includes: a first frame 11, a second frame 12, a third frame 13 and a fourth frame 14, and the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14 are rotatably connected or detachably connected at the junction in sequence; the bed board 2 includes: a back board 22, a hip board 23, a leg board 24 and a foot board 25; the back board 22, the hip board 23, the leg board 24 and the foot board 25 are respectively arranged on the top of the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14; the tail 0b of the back board 22 is hinged to the tail 0b of the first frame 11, and the head 0a of the leg board 24 is hinged to the head 0a of the third frame 13.

[0058] The packaging size of the electric bed generally depends on the size of the bed board 2 and the base 1. The flip device 3 is relatively small in size and can be designed to be placed between the bed board 2 and the base 1 or be disassembled before packaging. The packaging size of the electric bed can be greatly reduced by folding the bed board 2 and the base 1 into multiple parts, but the cost and manufacturing difficulty are difficult to control.

[0059] The present invention divides the bed board 2 into five parts and the base 1 into four parts. The back board 22, the buttocks board 23, the leg board 24 and the foot board 25 are respectively arranged on the top of the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14. It is only necessary to control the distance between the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14 to ensure that they can be folded. It meets the 130" UPS transportation standard, reduces transportation costs and enhances market competitiveness.

[0060] Furthermore, the bed board also includes: a head board 21, and the head board 21 and the back board 22 are rotatably connected or detachably connected at the junction.

[0061] The head panel 21 and the back panel 22 are rotatably connected or detachably connected and do not interfere with the base 1. After the other parts are folded, the head panel 21 can be placed in the folding direction of the base 1, which can not only obtain the standard bed board 2 area, but also help to further reduce the size after folding. This solution can adapt to more models of electric beds, facilitate the enrichment of the functions of electric beds, and have better versatility.

[0062] Preferably, the first frame 11 can be placed in a space enclosed by the second frame 12 , and the third frame 13 can be placed in a space enclosed by the fourth frame 14 .

[0063] After folding, the first frame 11 and the second frame 12 are in the same plane, and the third frame 13 and the fourth frame 14 are in the same plane, which reduces the thickness of the electric bed after folding, further reduces the packaging size of the electric bed, and reduces shipping costs.

[0064] Further, Figure 5 FIG. 1 is a perspective view of part A of a four-folding electric bed in a folded state according to an embodiment of the present invention, as shown in FIG. Figure 3 and Figure 5 As shown, the back plate 22 further includes a limiting member 221 , and the limiting member 221 is used to limit the rotation of the head plate 21 relative to the back plate 22 .

[0065] A stopper 221 is added to the back panel 22 so that the head panel 21 and the back panel 22 are connected as a whole, thereby expanding the area of ​​the back panel 22 and eliminating the need for additional bed legs for support, thereby facilitating quick folding.

[0066] Preferably, if Figure 5 As shown, the limiting member 221 includes: at least one baffle, which is rotatably connected to the back panel 22; when the head panel 21 is rotatable, the baffle is within the vertical projection of the back panel 22; when the head panel 21 is not rotatable, the baffle is within the vertical projection of both the back panel 22 and the head panel 21.

[0067] When folding, the baffle is rotated so that the baffle is separated from the head plate 21 and no longer interferes with the rotation of the head plate 21; when in use, the head plate 21 and the back plate 22 are in the same plane, and then the baffle is rotated so that the baffle is engaged with the head plate 21 to limit the rotation of the head plate 21 relative to the back plate 22, and the head plate 21 and the back plate 22 are connected as one. It is best to be arranged in pairs on both sides of the back plate 22 to better bear the weight. This technical solution is convenient and quick to fold and unfold, simple and practical.

[0068] Preferably, the limiting member 221 includes: at least one latch, which is provided on the back panel 22 and can telescopically move relative to the head panel 21; when the head panel 21 is rotatable, the latch is within the vertical projection of the back panel 22; when the head panel 21 is not rotatable, the latch is within the vertical projections of both the back panel 22 and the head panel 21.

[0069] When folding, the latch is retracted so that the latch is disengaged from the head panel 21 and no longer interferes with the rotation of the head panel 21; when in use, the head panel 21 and the back panel 22 are in the same plane, and the latch is extended so that the latch is engaged with the head panel 21, limiting the rotation of the head panel 21 relative to the back panel 22, and the head panel 21 and the back panel 22 are connected as one. It is best to be arranged in pairs on both sides of the back panel 22 to better bear the weight. This technical solution is convenient and quick to fold and unfold, simple and practical.

[0070] Further, Figure 6FIG. 1 is a schematic diagram of a semi-folded structure of a four-folding electric bed according to an embodiment of the present invention. Figure 6 As shown, the second frame 12 and the third frame 13 are rotatably connected via a double-axis rotating member 4, and both ends of the double-axis rotating member 4 are hinged to the second frame 12 and the third frame 13 respectively.

[0071] A pair of dual-axis rotating parts 4 are set at the junction of the second frame 12 and the third frame 13. The second frame 12 and the third frame 13 rotate along different rotation axes respectively without interfering with each other, which is convenient for two-way folding and limits the thickness of the electric bed after folding, making it convenient for folding and avoiding squeezing and damaging of internal components after folding, thereby preventing damage.

[0072] Specifically, Figure 7 This is an exploded view of part B in an embodiment of the present invention, as shown in FIG. Figure 7 As shown, the dual-axis rotating member 4 includes: a load-bearing portion 41 and two extension portions 42; wherein the two extension portions 42 extend in opposite directions with the load-bearing portion 41 as the center, and the extension surfaces of the two extension portions 42 are different; the two extension portions 42 are hinged to the second frame 12 and the third frame 13 respectively.

[0073] The purpose of this design is to achieve higher strength using less material under the current structure. Through structural adjustment, this part can be changed accordingly, which will help to further reduce the weight of the electric bed and reduce material and transportation costs.

[0074] Preferably, the hip plate 23 and / or the leg plate 24 are provided with openings matching with the dual-axis rotating member 4 .

[0075] After folding, the double-axis rotating member 4 intersects with the openings on the hip plate 23 and / or the leg plate 24 to prevent them from interfering with each other and affecting the folding. If there is no opening, the folding cannot be performed. In this way, the length of the double-axis rotating member 4 can be shortened as much as possible, the length of the electric bed can be controlled, and the length of the electric bed in the longitudinal and transverse directions after folding can be reduced, and the packaging size of the electric bed can be further reduced, leaving more space for enriching the functions of the electric bed, and more parts can be assembled in the factory, reducing the transportation and installation costs, facilitating quick installation and use, and further improving the versatility.

[0076] Specifically, a plurality of bed foot connection holes are provided at the front portion 0a of the first frame 11 , the rear portion 0b of the second frame 12 and the bottom of the load-bearing portion 41 .

[0077] The bed foot connection holes are used to install the bed feet. The specific number is selected according to the shape and weight of the bed, and it is sufficient to meet the needs of supporting the electric bed, allowing for tool-free and quick installation.

[0078] Furthermore, if Figure 3 and Figure 7As shown, it also includes: a concave reinforcing sheet 5, the two side walls of the reinforcing sheet 5 are respectively connected to the side edges of the second frame 12 and the third frame 13, the reinforcing sheet 5 is attached to the bottom of the load-bearing part 41 and is provided with a through hole matching the bed foot connection hole.

[0079] The reinforcing sheet 5 is used to limit the relative displacement between the second frame 12, the third frame 13 and the dual-axis rotating member 4, and to strengthen the support to prevent sinking and extend the life of the product.

[0080] Further, Figure 8 It is an exploded view of part C in an embodiment of the present invention, as shown in FIG. Figure 8 As shown, the first frame 11 and the second frame 12 are rotatably connected via a first uniaxial rotating member, and the third frame 13 and the fourth frame 14 are rotatably connected via a second uniaxial rotating member; both ends of the first uniaxial rotating member are fixedly connected to the second frame 12 and the third frame 13 respectively, and both ends of the second uniaxial rotating member are fixedly connected to the third frame 13 and the fourth frame 14 respectively.

[0081] By adding a pair of first single-axis rotating parts and a pair of second single-axis rotating parts at adjacent positions of the first frame 11 and the second frame 12, and the third frame 13 and the fourth frame 14, preferably arranging them on both sides of the base 1, the force distribution is more uniform, and at the same time, direct hinge connection between the first frame 11 and the second frame 12, and the third frame 13 and the fourth frame 14 is avoided, which facilitates the adjustment of the spacing according to needs, ensures full folding, and improves the versatility of parts. In addition, maintenance is more convenient when the hinge is damaged, and there is no need to replace the entire bed frame, thereby reducing maintenance costs.

[0082] Specifically, the first uniaxial rotating member and the second uniaxial rotating member both include: a first connecting plate 6a and a second connecting plate 6b, and the first connecting plate 6a and the second connecting plate 6b are hinged at an overlapping portion.

[0083] This technical solution is relatively simple to produce and install, has low cost and strong practicality.

[0084] Furthermore, if Figure 3 As shown, it also includes: a first reinforcing hoop 7a and a second reinforcing hoop 7b, the first reinforcing hoop 7a is detachably connected to the first frame 11 and the second frame 12, and the second reinforcing hoop 7b is detachably connected to the third frame 13 and the fourth frame 14.

[0085] It is used to strengthen the connection between the first frame 11 and the second frame 12, and the third frame 13 and the fourth frame 14 to prevent sinking and extend the service life of the electric bed.

[0086] Preferably, the first reinforcing hoop 7a and the second reinforcing hoop 7b both include: an L-shaped rotating part 71 and a U-shaped clamping part 72, the rotating part 71 and the clamping part 72 are fixedly connected, the rotating part 71 is rotatably connected to the base 1, and the rotating part 71 and the clamping part 72 are respectively engaged on the base 1.

[0087] In addition to strengthening the connection, the clamping part 72 can also cooperate with the rotating part 71. When folding, the connection between the clamping part 72 and the base 1 is removed, and the first reinforcement clamp 7a and the second reinforcement clamp 7b can be rotated relative to the base 1 through the rotation connection between the rotating part 71 and the base 1, and the restriction of the folding of the corresponding parts by the first reinforcement clamp 7a and the second reinforcement clamp 7b is removed, and the first reinforcement clamp 7a and the second reinforcement clamp 7b do not need to be removed; when in use, the first reinforcement clamp 7a and the second reinforcement clamp 7b are rotated to complete the restriction of the corresponding parts, so that the corresponding parts form a whole. Simple and practical, convenient and quick to disassemble and assemble, reducing the time and labor cost of on-site installation.

[0088] Preferably, the rotating portion 71 and the clamping portion 72 are integrally formed, which helps to improve the strength of the first reinforcement clamp 7a and the second reinforcement clamp 7b.

[0089] Preferably, the turning device 3 is disposed between the bed board 2 and the base 1 , and the turning device 3 is used to drive the back board 22 and / or the leg board 24 to turn relative to the base 1 .

[0090] By changing the angles of the back panel 22 and / or the leg panel 24, the physiological curves of different parts of the human body can be met, providing better support to the human body, relaxing the body, and providing the user with a better experience.

[0091] Further, Fig. 9 FIG. 1 is a partial enlarged view of the turning device in the embodiment of the present invention. Figure 2 and Fig. 9As shown, the flipping device 3 includes: a first flipping device 3a and a second flipping device 3b, the first flipping device 3a is arranged between the back plate 22 and the first frame 11, and the second flipping device 3b is arranged between the leg plate 24, the foot plate 25, the third frame 13 and the fourth frame 14; wherein the first flipping device 3a and the second flipping device 3b both include: two sliding rods 31, a flipping rod 32 and a driving component 33; the two sliding rods 31 are respectively arranged at the two ends of the flipping rod 32 in an H-like shape; the middle part of the sliding rod 31 protrudes toward the bed board 2 in an obtuse V-shape, the head 0a of the sliding rod 31 is provided with a rotatable first roller 311, and the middle part of the sliding rod 31 A rotatable second roller 312 is provided at the bottom, and the tail portion 0b of the sliding rod 31 is hinged to the base 1; the flip rod 32 is located between the middle of the sliding rod 31 and the tail portion 0b of the sliding rod 31; the two ends of the driving component 33 are respectively hinged to the flip rod 32 and the base 1, and the horizontal direction of the thrust of the driving component 33 is the same as the horizontal direction from the first roller 311 to the second roller 312; the horizontal direction from the first roller 311 to the second roller 312 points to the rotation axis of the flip device 3 driving the bed board 2 where they are located; the rotation axes of the first roller 311, the second roller 312, the sliding rod 31, the head board 21, the back board 22 and the leg board 24 are parallel to each other.

[0092] The sliding rod 31 is hinged to the base 1, and the sliding rod 31 adopts a curved structure, that is, the middle part is obtuse, and the obtuse angle is 120° to 170°. When the driving component 33 pushes the bed board 2 to flip, the flipping rod 32 drives the sliding rod 31 to rotate with the hinge point between the sliding rod 31 and the base 1 as the rotating axis, and the second roller 312 rolls on the bottom surface of the corresponding bed board 2, pushing the corresponding bed board 2 to flip upward relative to the base 1. When the pushed bed board 2 flips to 20° to 30° relative to the base 1, the first roller 311 contacts the bottom surface of the bed board 2 and rolls on its bottom surface. When there is only one roller, there will be very large resistance when the support assembly flips 20° to 30°. Adding another roller can overcome this resistance and ensure that the bed board 2 flips smoothly. In addition, the structure of the driving device reduces the thickness of the smart bed, and the smart bed is thinner.

[0093] In addition, each flipping device 3 is not connected to the bed board 2. Once an object prevents the raised bed board 2 from falling, the flipping device 3 and the bed board 2 change from a contact state to a non-contact state to prevent pinching.

[0094] Preferably, a reinforcing plate 313 is provided at the angle between the sliding rod 31 and the flipping rod 32. The connection strength between the sliding rod 31 and the flipping rod 32 is enhanced, and the strength of the flipping device is improved. The sliding rod 31 and the reinforcing plate 313 are both sheet-shaped, and the mass and volume of the components are reduced as much as possible without affecting the function, which helps to reduce the mass and volume of the smart bed.

[0095] Preferably, a U-shaped ear hanger 321 is fixedly provided on the flip rod 32, and the driving component 33 is hinged to the flip rod 32 through the U-shaped ear hanger 321, which is strong and durable and convenient to produce and assemble.

[0096] Preferably, Fig.10 FIG. 1 is a schematic diagram of the lever arm of the flipping mechanism in an embodiment of the present invention. Fig.10 As shown, the lengths and positions of the gravity arm, the first resistance arm and the second resistance arm of the flip device 3 in the horizontal direction when the flip device 3 is in the horizontal state are adjusted according to the following formulas (1) and (2) to reduce the length of the power arm of the vertical direction of each flip device 3 in the horizontal state:

[0097] F1=(G×L3)÷L1 (1);

[0098] L2>(F1×L4)÷F (2);

[0099] Wherein, L1 represents the first resistance arm, L2 represents the power arm, L3 represents the gravity arm, L4 represents the second resistance arm, G represents the weight of the bed board 2, F represents the thrust, and F1 represents the resistance;

[0100] Wherein, the first resistance arm is above the second resistance arm.

[0101] The resistance F1 is the force perpendicular to the base 120 starting from the contact point between the second roller 312 and the slide rail 9, the weight G is the gravity perpendicular to the midpoint of the bed board 2 contacted by the second roller 312, the gravity arm L3 is the straight-line distance from the midpoint of the bed board 2 contacted by the second roller 312 to the rotation axis of the bed board 2, the resistance arm L1 is the straight-line distance from the contact point between the second roller 312 and the bed board 2 to the rotation axis of the bed board 2, and the power arm L2 is the straight-line distance from the hinge point of the sliding rod 31 and the base 1 to the extension line of the thrust F.

[0102] The length of the power arm L2 is directly proportional to the thickness of the flip device 3, that is, the shorter the power arm L2 is, the thinner the flip device 3 is, which in turn affects the thickness of the smart bed. For example, the length of the first resistance arm is increased and the length of the gravity arm is reduced to reduce the resistance. When the resistance is reduced, the length of the second resistance arm is reduced to further reduce the length of the power arm, etc. When F<3000N and G>1285N, that is, when the smart bed bears the weight of the human body, through force analysis, the position of the force arm is simulated and the change of force is calculated to find the best force arm, optimize the force arm structure of the smart bed, reduce the thickness of the smart bed, make it thinner, effectively control the volume of the smart bed, and reduce transportation costs.

[0103] Furthermore, if Figure 3 As shown, the back plate 22 , the leg plate 24 and the foot plate 25 are all provided with hollow holes 8 , and the hollow holes 8 are located above the driving component 33 .

[0104] Each bed board 2 may be provided with a hollow hole 8, and the size and arrangement of the hollow holes 8 may be set as required. The hollow holes 8 can reduce the weight of the smart bed, avoid scratches with the driving component 33, and accommodate the hinged portion of the driving component 33 and the flip rod 32, further reducing the thickness of the smart bed.

[0105] Preferably, the driving component 33 is a linear push rod.

[0106] Linear actuators are low in cost and easy to control the volume of smart beds. They are simple and practical.

[0107] Preferably, the linear actuator is of the push-only type.

[0108] The push-only linear actuator only outputs thrust and does not output pulling force, that is to say, the bed board 2 only relies on gravity to fall during its descent, and the sliding rod 31 and the flipping rod 32 also rely on their own gravity to descend, and cooperate with the contact sliding of the rollers with the bed board 2, completely avoiding the risk of pinching caused by the bed board 2 and the flipping device 3.

[0109] Further, Fig.11 It is an exploded view of part C in an embodiment of the present invention, as shown in FIG. Fig.11 As shown, it also includes: a slide rail 9, which is arranged in the back plate 22 and the leg plate 24 and matches with the corresponding first roller 311 and the second roller 312.

[0110] The slide rail 9 can be arranged inside the bed board 2. The closer the top of the slide rail 9 is to the top surface of the bed board 2, the thinner the overall thickness of the electric bed is. The slide rail 9 can be made of wear-resistant materials such as metal to avoid wear caused by long-term contact between the roller and the bed board 2, thereby improving product durability.

[0111] Preferably, the slide rail 9 includes: a U-shaped slide 91, the top edges of the two side walls of the slide 91 extend in opposite directions to form a slide connection part 92, the bed board 2 is provided with a through hole, the slide 91 is located in the through hole, and the slide connection part 92 is connected to the bottom surface of the bed board 2.

[0112] The U-shaped slide 91 limits the roller in a specific direction to prevent displacement and damage to the roller; the slide connection part 92 is used to increase the contact area between the slide rail 9 and the bed board 2, prevent excessive local pressure from damaging the bed board 2, and increase the life of the product.

[0113] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0114] It will be appreciated that the present invention is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A four-folding electric bed, characterized in that: include: A base, a bed board and a turning device, wherein the bed board is laid flat on the top of the base, and the turning device is used to drive a part of the bed board to turn relative to the base; wherein, The base comprises: a first frame, a second frame, a third frame and a fourth frame, wherein the first frame, the second frame, the third frame and the fourth frame are rotatably connected or detachably connected at the junction in sequence; The bed board includes: a back board, a hip board, a leg board and a foot board; The back panel, the hip panel, the leg panel and the foot panel are respectively arranged on the top of the first frame, the second frame, the third frame and the fourth frame; The tail of the back panel is hinged to the tail of the first frame, and the head of the leg panel is hinged to the head of the third frame; The second frame and the third frame are rotatably connected via a double-axis rotating member, and two ends of the double-axis rotating member are hinged to the second frame and the third frame respectively; The dual-axis rotating member comprises: a load-bearing portion and two extension portions; The two extension parts extend in opposite directions with the load-bearing part as the center, and the extension surfaces of the two extension parts are different; The two extensions are hinged to the second frame and the third frame respectively; The first frame is placed in the space enclosed by the second frame, and the third frame is placed in the space enclosed by the fourth frame; The first frame and the second frame are rotatably connected via a first single-axis rotating member, and the third frame and the fourth frame are rotatably connected via a second single-axis rotating member; Two ends of the first uniaxial rotating member are fixedly connected to the second frame and the third frame respectively, and two ends of the second uniaxial rotating member are fixedly connected to the third frame and the fourth frame respectively; The first uniaxial rotating member and the second uniaxial rotating member both include a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are hinged at an overlapping position.

2. The four-fold electric bed according to claim 1, characterized in that: The bed board also includes a head board, and the head board is rotatably connected or detachably connected to the back board at a junction.

3. The four-fold electric bed according to claim 2, characterized in that: The back plate further comprises: a limiting member, and the limiting member is used to limit the rotation of the head plate relative to the back plate.

4. The four-folding electric bed according to claim 3, characterized in that: The limiting member comprises: at least one baffle plate, the baffle plate being rotatably connected to the back plate; When the head panel is rotatable, the baffle is within the vertical projection of the back panel; When the head panel is not rotatable, the baffle is simultaneously within the vertical projections of the back panel and the head panel.

5. The four-fold electric bed according to claim 3, characterized in that: The position-limiting member comprises: at least one latch, which is arranged on the back plate and can move telescopically relative to the head plate; When the head panel is rotatable, the latch is within the vertical projection of the back panel; When the head panel is not rotatable, the latch is simultaneously within the vertical projections of the back panel and the head panel.

6. The four-fold electric bed according to claim 1, characterized in that: The hip plate and / or the leg plate are provided with openings matching with the dual-axis rotating member.

7. The four-fold electric bed according to claim 1, characterized in that: A plurality of bed foot connection holes are arranged at the head of the first frame, the tail of the second frame and the bottom of the load-bearing part.

8. The four-fold electric bed according to claim 7, characterized in that: Also includes: A concave-shaped reinforcement sheet, the two side walls of which are respectively fitted with the sides of the second frame and the third frame, the reinforcement sheet is fitted with the bottom of the load-bearing part and is provided with a through hole matching the bed foot connection hole.

9. The four-fold electric bed according to claim 1, characterized in that: Also includes: A first reinforcing hoop and a second reinforcing hoop, wherein the first reinforcing hoop is detachably connected to the second frame and the third frame, and the second reinforcing hoop is detachably connected to the third frame and the fourth frame.

10. The four-fold electric bed according to claim 9, characterized in that: The first reinforcing clamp and the second reinforcing clamp both include: an L-shaped rotating part and a U-shaped clamping part, the rotating part and the clamping part are fixedly connected, the rotating part is rotatably connected to the base, and the rotating part and the clamping part are respectively engaged on the base.

11. The four-fold electric bed according to claim 10, characterized in that: The rotating part and the holding part are integrally formed.

12. The four-fold electric bed according to any one of claims 2 to 5, characterized in that: The flipping device is arranged between the bed board and the base, and is used for driving the back board and / or the leg board to flip relative to the base.

13. The four-fold electric bed according to claim 12, characterized in that: The flipping device comprises: a first flipping device and a second flipping mechanism, wherein the first flipping device is arranged between the back plate and the first frame, and the second flipping mechanism is arranged between the leg plate, the foot plate, the third frame and the fourth frame; Wherein, the first flipping device and the second flipping mechanism both include: two sliding rods, a flipping rod and a driving component; Two sliding rods are respectively arranged at the two ends of the flip rod in an H-shape; The middle part of the sliding rod protrudes toward the bed board in an obtuse V shape, the head of the sliding rod is provided with a rotatable first roller, the middle part of the sliding rod is provided with a rotatable second roller, and the tail of the sliding rod is hinged to the base; The flip rod is located between the middle of the sliding rod and the tail of the sliding rod; The two ends of the driving component are respectively hinged to the flip rod and the base, and the horizontal direction of the thrust of the driving component is the same as the horizontal direction from the first roller to the second roller; The horizontal direction from the first roller to the second roller points to the rotation axis of the turning device driving the bed board where the turning device is located; The rotation axes of the first roller, the second roller, the sliding rod, the head plate, the back plate and the leg plate are parallel to each other.

14. The four-fold electric bed according to claim 12, characterized in that: The lengths and positions of the gravity arm, the first resistance arm and the second resistance arm of the flip device in the horizontal direction in the flat state are adjusted according to the following formulas (1) and (2) to reduce the length of the power arm of each flip device in the vertical direction in the flat state: F1=(G×L3)÷L1 (1); L2>(F1×L4)÷F (2); Wherein, L1 represents the first resistance arm, L2 represents the power arm, L3 represents the gravity arm, L4 represents the second resistance arm, G represents the weight of the bed board, F represents the thrust, and F1 represents the resistance; Wherein, the first resistance arm is above the second resistance arm.

15. The four-fold electric bed according to claim 13, characterized in that: The back plate, the leg plate and the foot plate are all provided with hollow holes, and the hollow holes are located above the driving component.

16. The four-fold electric bed according to claim 13, characterized in that: The driving component is a linear push rod.

17. The four-fold electric bed according to claim 16, characterized in that: The linear actuator is a push-only type.

18. The four-fold electric bed according to claim 13, characterized in that: Also includes: A slide rail is disposed in the back plate and the leg plate and matches with the corresponding first roller and the second roller.

19. The four-fold electric bed according to claim 18, characterized in that: The slide rail comprises: a U-shaped slide, the top edges of the two side walls of the slide extend in opposite directions to form a slide connection part, the bed board is provided with a through hole, the slide is located in the through hole, and the slide connection part is connected to the bottom surface of the bed board.

Images