Lifting mechanism of bed frame

Abstract

The utility model relates to a lifting mechanism, in particular to a lifting mechanism of a bed frame. Comprising a second rectangular bed frame and a second lifting mechanism arranged in the second rectangular bed frame; the second bed board and the third bed board are erected above the second rectangular bed frame and are hinged to each other; the second lifting mechanism comprises a second fixed frame, a jacking support and a second movable frame arranged in the second fixed frame, and the second movable frame can slide in the second fixed frame. One end of the jacking support is in sliding connection with the second fixing frame, and the other end of the jacking support is hinged to the second bed board; the third bed plate is connected with the second rectangular bed frame through a third connecting rod; through staged work of the jacking mechanism, the bed board can be effectively lifted to a higher height, meanwhile, the working condition of the motor can be reduced, the structure is simplified, and installation is convenient; and meanwhile, compared with the traditional technology, the product cost can be further saved.

Description

TECHNICAL FIELD

[0001] The present application relates to a lifting mechanism, in particular to a lifting mechanism of a bed frame. BACKGROUND

[0002] With the continuous development of modern home design, people's requirements for bed frames are no longer limited to practicality and comfort, but also pursue their aesthetic appearance and space utilization. The traditional bed frame design often has the problem of high thickness, which not only affects the overall aesthetics of the bedroom, but also occupies valuable indoor space. Therefore, the demand for ultra-thin bed frames in the market is increasing.

[0003] However, the design of ultra-thin bed frames is not easy. Due to the significant reduction in the thickness of the bed frame, the stress distribution and load-bearing capacity of the bed frame face serious challenges. In order to realize the lifting function of the ultra-thin bed frame, it is usually necessary to configure a precise lifting structure. However, when the height of the bed frame is reduced to about 50mm, the space of the lifting structure is severely limited, resulting in a sharp reduction in the power arm. This change makes the motor need to bear more load, and the required motor thrust also rises. In order to solve this problem, some manufacturers try to use multiple motors to lift the bed board, but this approach not only increases the manufacturing cost, but also brings the problem of synchronous control of the motors.

[0004] In addition, the design of the ultra-thin bed frame also needs to consider the safety and use experience of the user. The traditional bed frame structure may have a hand clamping risk during lifting, especially during the lifting of the bed frame, the user's fingers are easy to be clamped by the gap between the bed frame and the bed board. This problem is particularly prominent in the design of ultra-thin bed frames, because the gap of the ultra-thin bed frame is usually smaller, and it is more likely to cause a hand clamping accident. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to overcome one of the deficiencies in the prior art, to propose an improved lifting structure, mainly by simplifying and innovatively designing the lifting structure, so that the overall thickness of the bed body can be further reduced, and the installation difficulty and manufacturing cost of such structure can also be reduced.

[0006] A lifting mechanism of a bed frame,

[0007] a first rectangular bed frame, a first lifting mechanism arranged in the first rectangular bed frame;

[0008] and a first bed board erected above the first rectangular bed frame;

[0009] The first lifting mechanism comprises a first fixed frame, a lifting support and a first moving frame arranged inside the first fixed frame, the first moving frame being slidable in the first fixed frame;

[0010] One end of the lifting support is in sliding connection with the first fixed frame, and the other end is a free end;

[0011] The lifting support lowers or raises the first bed plate through reciprocating sliding of the first moving frame.

[0012] Further, the first rectangular frame comprises a first edge frame, a second edge frame, a third edge frame and a fourth edge frame;

[0013] The first fixed frame is in the shape of the Chinese character 'n' and comprises a fifth edge frame, a sixth edge frame and a seventh edge frame connected in sequence;

[0014] The fifth edge frame and the seventh edge frame are arranged in parallel, and the first fixed frame and the fourth edge frame enclose a rectangle;

[0015] The first moving frame is in the shape of the Chinese character 'n' and comprises an eighth edge frame, a ninth edge frame and a tenth edge frame connected in sequence;

[0016] The eighth edge frame and the tenth edge frame outside which are parallel to each other are respectively provided with a first pulley and a fourth pulley, and the inner side of the fifth edge frame and the seventh edge frame is provided with a first sliding rail matched with the first pulley and the fourth pulley;

[0017] The lifting support comprises left-right symmetrical support rods, left-right symmetrical first and second connecting rods and a first push rod motor;

[0018] One end of the first push rod motor is fixedly connected with the fourth edge frame, and the other end of the first push rod motor is fixedly connected with the ninth edge frame, and the first push rod can push the first moving frame to move in the first fixed frame.

[0019] Further, one end of the support rod is provided with a third pulley, and the third pulley is fixedly connected in the first sliding rail, and the other end of the support rod is a free end and faces the fourth edge frame;

[0020] One end of the first connecting rod is hingedly connected with the first pulley, and the other end of the first connecting rod is hingedly connected with the middle region of the support rod;

[0021] A second pulley is arranged between the third pulley and the first pulley, the second pulley is closer to the first pulley, one end of the second connecting rod is hingedly connected with the second pulley, and the other end of the second connecting rod is hingedly connected with the back of the first bed plate;

[0022] The second pulley extends towards the outside of the eighth edge frame and the tenth edge frame and extends to an L-shaped guide rail piece outside the eighth edge frame and the tenth edge frame, and the second extension pulley is arranged on the L-shaped guide rail piece.

[0023] Further, the support rod comprises a first straight part and a second straight part, the two straight parts are bent at an obtuse angle; a first support wheel is arranged at the intersection of the first straight part and the second straight part, and a second support wheel is arranged at the end of the second straight part, which is also the free end of the lifting support.

[0024] One end of the support rod is provided with a third pulley, which is slidingly connected in the first sliding rail, and the other end of the support rod is a free end, which is directed towards the fourth frame;

[0025] One end of the first connecting rod is hingedly connected to the first pulley, and the other end of the first connecting rod is hingedly connected to the middle region of the support rod;

[0026] A second pulley is arranged between the third pulley and the first pulley, the second pulley is closer to the first pulley, one end of the second connecting rod is hingedly connected to the second pulley, and the other end of the second connecting rod is hingedly connected to the back of the first bed plate;

[0027] The second pulley extends towards the outside of the eighth frame and the tenth frame and extends to the L-shaped guide rail piece outside the eighth frame and the tenth frame, and the second extension wheel is arranged on the L-shaped guide rail piece.

[0028] Further, a first connecting plate is arranged in the middle of the first bed plate and is hingedly connected to the bottom of the first bed plate, the area of the first connecting rod is smaller than that of the first connecting plate, and the first connecting rod is embedded in the first bed plate; one end of the first connecting plate is hingedly connected to one end of the second connecting rod; when the first bed plate is lifted, the first connecting plate will be separated from the first bed plate.

[0029] Further, a second rectangular bed frame is arranged, and a second lifting mechanism is arranged in the second rectangular bed frame;

[0030] A second bed plate and a third bed plate are arranged above the second rectangular bed frame and are hingedly connected to each other;

[0031] The second lifting mechanism comprises a second fixed frame, a jacking support, and a second moving frame arranged in the second fixed frame, the second moving frame can slide in the second fixed frame;

[0032] One end of the jacking support is slidingly connected to the second fixed frame, and the other end of the jacking support is hingedly connected to the second bed plate;

[0033] The third bed plate is connected to the second rectangular bed frame through a third connecting rod;

[0034] The jacking support lowers or raises the second bed plate and the third bed plate through the reciprocating sliding of the second moving frame.

[0035] Further, the rectangular frame comprises a first surrounding edge, a second surrounding edge, a third surrounding edge and a fourth surrounding edge;

[0036] The second fixed frame is in the shape of a Chinese character 'n', comprising a fifth surrounding edge, a sixth surrounding edge and a seventh surrounding edge connected in sequence;

[0037] The fifth surrounding edge and the seventh surrounding edge are arranged in parallel, and two ends thereof are connected with the second surrounding edge and the sixth surrounding edge respectively;

[0038] The second moving frame is in the shape of a Chinese character 'n', comprising an eighth surrounding edge, a ninth surrounding edge and a tenth surrounding edge connected in sequence;

[0039] Two ends of the eighth surrounding edge and the tenth surrounding edge outside are provided with a fifth pulley and a sixth pulley respectively, and the inner side of the fifth surrounding edge and the seventh surrounding edge is provided with a second sliding rail matched with the fifth pulley and the sixth pulley;

[0040] The jacking support comprises left-right symmetrical first top rods, a second top rod and a second push rod motor;

[0041] One end of the first top rod is hingedly connected with one end of the eighth surrounding edge, and the other end of the first top rod is hingedly connected with one end of the second top rod; the other end of the second top rod is connected with the back of the second bed plate; the side of the first top rod close to the second top rod has an upwardly bent folding edge, and the folding edge end is hingedly connected with the second top rod; the length of the second top rod is less than the length of the first top rod.

[0042] Further, the second bed plate is provided with a second connecting plate hingedly connected with the bottom thereof, the area of the second connecting plate is less than that of the second bed plate, and the second connecting plate is embedded in the second bed plate; the second connecting plate is hingedly connected with one end of the second top rod; when the second bed plate is lifted, the second connecting plate will be separated from the second bed plate.

[0043] The utility model discloses the beneficial effects of:

[0044] 1) can be through the stage work of lifting mechanism, effectively the bed plate is lifted to higher height, can reduce the working compliance of motor, simplify the structure simultaneously, convenient to install, simultaneously, compared with traditional technology, can further save product cost.

[0045] 2) the folding edge of support rod and arc design, can make the angle of lifting mechanism lifting be greater, and the power consumption of motor be lower. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The structure diagram of the first rectangular frame in the embodiment of the utility model Figure 1 ;

[0047] Figure 2Structure diagram of the first rectangular frame in the embodiment of the utility model Figure 2 ;

[0048] Figure 3 Structure diagram of the first rectangular frame after lifting in the embodiment of the utility model

[0049] Figure 4 Side view of the first rectangular frame after lifting in the embodiment of the utility model

[0050] Figure 5 Structure diagram of the second extension wheel and L-shaped guide rail piece in the embodiment of the utility model

[0051] Figure 6 Side view of the edge folding support rod after lifting in the embodiment of the utility model

[0052] Figure 7 Structure diagram of the edge folding support rod after lifting in the embodiment of the utility model

[0053] Figure 8 Structure diagram of the first connecting plate in the embodiment of the utility model

[0054] Figure 9 Structure diagram of the second rectangular frame in the embodiment of the utility model

[0055] Figure 10 Side view of the second rectangular frame in the embodiment of the utility model

[0056] Figure 11 Structure diagram of the rotation of the jacking support in the embodiment of the utility model

[0057] Figure 12 Structure diagram of the second connecting plate in the embodiment of the utility model

[0058] Reference numerals: 1 first rectangular bed frame; 11 first side frame; 12 second side frame; 13 third side frame; 14 fourth side frame; 2 first lifting mechanism; 21 first fixed frame; 211 fifth side frame; 212 sixth side frame; 213 seventh side frame; 214 first sliding rail; 22 first moving frame; 221 eighth side frame; 222 ninth side frame; 223 tenth side frame; 224 first pulley; 225 fourth pulley; 226 second pulley; 227 third pulley; 228 second extension wheel; 229 L-shaped guide rail piece; 23 lifting support; 231 support rod; 2311 first straight part; 2312 second straight part; 2313 first support wheel; 2314 second support wheel; 232 first connecting rod; 233 second connecting rod; 234 first push rod motor; 3 first bed plate; 31 first connecting plate; 4 second rectangular frame; 41 first surrounding edge; 42 second surrounding edge; 43 third surrounding edge; 44 fourth surrounding edge; 5 second bed plate; 51 second connecting plate; 6 third bed plate; 7 second lifting mechanism; 71 second fixed frame; 711 fifth surrounding edge; 712 sixth surrounding edge; 713 seventh surrounding edge; 72 second moving frame; 721 eighth surrounding edge; 722 ninth surrounding edge; 723 tenth surrounding edge; 724 fifth pulley; 725 sixth pulley; 726 second sliding rail; 727 stop pin; 73 lifting support; 731 first top rod; 732 second top rod; 733 second push rod motor; 74 third connecting rod. DETAILED DESCRIPTION

[0059] The features of the present application will be further described in the following embodiments.

[0060] The specific structural and functional details disclosed herein are merely representative for purposes of describing the exemplary embodiments of the present application. However, the present application can be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

[0061] First embodiment

[0062] As Figure 1As shown in the figure, a lifting mechanism of a bed frame, a first rectangular bed frame 1, a first lifting mechanism 2 arranged in the rectangular bed frame, and a first bed plate 3 arranged above the first rectangular bed frame 1; the first lifting mechanism 2 comprises a first fixed frame 21, a lifting support 23, and a first moving frame 2 arranged inside the first fixed frame 21, the first moving frame 2 can slide in the first fixed frame 21; therefore, the area of the first moving frame 2 is generally smaller than that of the first fixed frame 21. One end of the lifting support 23 is in sliding connection with the first fixed frame 21, and the other end is a free end; the lifting support 23 lowers or raises the first bed plate 3 through the reciprocating sliding of the first moving frame 2. In the embodiment, when the lifting support 23 is in a flat state, the thickness of the first lifting mechanism 2 is not greater than that of the first rectangular bed frame 1, and the components of the first lifting mechanism 2 can be hidden by the first rectangular bed frame 1 when viewed from the outside of the bed body, so as to form an ultra-thin electric bed with only the thickness of the bed frame.

[0063] Specifically, the first rectangular frame comprises a first side frame 11, a second side frame 12, a third side frame 13, and a fourth side frame 14; the first fixed frame 21 is in the shape of a U and comprises a fifth side frame 211, a sixth side frame 212, and a seventh side frame 213 connected in sequence; the fifth side frame 211 and the seventh side frame 213 are arranged in parallel, and the first fixed frame 21 and the fourth side frame 14 form a rectangle. Figure 2 As shown in the figure, the first moving frame 2 is in the shape of a U and comprises an eighth side frame 221, a ninth side frame 222, and a tenth side frame 223 connected in sequence; the outer sides of the mutually parallel eighth side frame 221 and tenth side frame 223 are respectively provided with a first pulley 224 and a fourth pulley 225, and the inner sides of the fifth side frame 211 and the seventh side frame 213 are provided with a first sliding rail 224 matched with the first pulley 224 and the fourth pulley 225. In the embodiment, the first pulley 224 and the fourth pulley 225 are arranged outside the first moving frame 2, so that the first moving frame can slide within the range of the first fixed frame. This is an important basis for lifting the first bed plate 3 by the lifting support 23 and the second connecting rod 233.

[0064] As shown in the figure, Figure 3 , 4 As shown in the figure, the lifting support 23 comprises left-right symmetrical support rods 231, left-right symmetrical first connecting rods 232 and second connecting rods 233, and a first push rod motor 234. The pulleys arranged on the support rods 231, the first connecting rods 232, and the second connecting rods 233 are also arranged in left-right symmetry.

[0065] One end of the first push rod motor 234 is fixedly connected with the fourth side frame 14, and the other end of the first push rod motor 234 is fixedly connected with the ninth side frame 222, and the first push rod can push the first moving frame 2 to move in the first fixed frame 21; in this embodiment, a push rod motor is used to give the first moving frame a pushing force for movement, and of course the movement of the first moving frame is not limited to a pushing force, and a corresponding pulling force can be used instead.

[0066] One end of the support rod 231 is provided with a third pulley 227, and the third pulley 227 is fixed in the first sliding rail 224; the other end of the support rod 231 is a free end, which is directed to the fourth side frame 14. In this example, one end of the support rod 231 is coaxially hinged with the third pulley 227, and the third pulley 227 is axially fixed in the first sliding rail 224 and cannot move back and forth along the sliding rail. When the first moving frame moves towards the third pulley 227, it will drive the support rod 231 to rotate clockwise, thereby lifting the first bed plate 3. The third pulley 227 is a fixed part in this embodiment, although it is named with a pulley, but it does not have the function of a pulley itself. In another embodiment, the third pulley is a part with sliding function. Since the initial position and connection method of the part in the two embodiments are similar, other part names are not replaced.

[0067] One end of the first connecting rod 232 is hinged with the first pulley 224, and the other end of the first connecting rod 232 is hinged with the middle region of the support rod 231. In this embodiment, the main function of the first connecting rod 232 is to lift the support rod 231 by moving itself, so that the support rod 231 rotates clockwise, thereby driving the first bed plate 3 to lift.

[0068] The third pulley 227 is provided between the first pulley 224 and the second pulley 226, the second pulley 226 is closer to the first pulley 224, one end of the second connecting rod 233 is hinged with the second pulley 226, and the other end is hinged with the back of the first bed plate 3. In this embodiment, the second connecting rod 233 also serves to lift the first bed plate 3, but the angle of lifting is larger than that of the support rod 231. It mainly relies on the pushing of the first pulley 224, and after moving a distance, it will contact the second pulley 226 due to the close distance between the second pulley 226 and the first pulley 224, thereby driving the second pulley 226 to continue moving. Since the second connecting rod 233 is also hinged with the back of the first bed plate 3, when the bed plate is lifted by the support rod 231, the second connecting rod 233 will also be lifted, until the bed plate is lifted to be separated from the support rod 231, then the second connecting rod 233 which is lifted continues to lift the bed plate to a larger angle range, providing users with a better bed plate lifting experience. Therefore, the support rod 231 lifting the bed plate and the second connecting rod 233 lifting the bed plate are two stages in sequence, corresponding to different angle ranges of the bed plate rising.

[0069] As shown in Figure 5 The second pulley 226 extends towards the outside of the eighth frame 221 and the tenth frame 223, and extends to the L-shaped guide rail piece 229 outside the eighth frame 221 and the tenth frame 223. The second extension wheel 228 is arranged on the L-shaped guide rail piece 229. In this embodiment, the second extension wheel 228 is coaxially connected with the second pulley 226, and is arranged on the L-shaped guide rail piece 229 outside the first moving frame. The second connecting rod 233 is arranged on the shaft between the second extension wheel 228 and the second pulley 226, so that the connection of the second connecting rod 233 is more stable and will not tilt towards one side, and better supports the bed plate.

[0070] In summary, the characteristics of the lifting mechanism in the flat state are as follows. The first moving frame is provided with the first pulley 224 and the fourth pulley 225 at both ends and is slidably connected with the first fixed frame, so that the first moving frame can move forward and backward along the slide rail on the first fixed frame. The first pulley 224 is arranged on the first moving frame near the head side, and the first connecting rod 232 is hinged inside the first pulley 224. The first connecting rod 232 is hinged with the middle part of the lifting support 23. Therefore, the first support wheel 2313 only has the freedom in the front and back directions. The support pulley is hinged above the lifting support 23. The support wheel is tangent to the back of the first bed plate 3 in the flat state. The second pulley 226 is arranged between the first pulley 224 and the support pulley, and a connecting rod is arranged between the second pulley 226 and the support pulley. The second extension wheel 228 is arranged between the second pulley 226 and the first moving frame, and the second extension wheel 228 is arranged on the L-shaped guide rail piece 229 of the first moving frame and slides upward in the lifting stage.

[0071] The L-shaped guide rail plate 229 in this structure can ensure that when the first pulley and the L-shaped guide rail are in contact, it can receive the thrust from the first moving frame and bear the pressure from the second connecting rod, thus preventing contact between the first pulley and the second pulley and avoiding the increase of internal force and the wear of the two pulleys.

[0072] Regarding the first embodiment, the movement between the pulleys is summarized as follows: the distance between the first pulley 224 and the fourth pulley 225 remains unchanged while they translate simultaneously; the distance between the first pulley 224 and the second pulley 226 continuously decreases until the distance between the first pulley 224 and the second pulley 226 remains at a fixed value, that is, the first pulley 224 abuts against the L-shaped guide rail, and then the first pulley 224, the fourth pulley 225, and the second pulley 226 move together, while the third pulley 227 remains in a fixed position.

[0073] Second embodiment

[0074] The structures not mentioned in this embodiment are the same as those in the first embodiment. A different structure is used on the lifting support in this embodiment.

[0075] like Figure 6 As shown, specifically, the support rod 231 includes a first straight section 2311 and a second straight section 2312, with the two straight sections bent at an obtuse angle. A first support wheel 2313 is provided at the junction of the first straight section 2311 and the second straight section 2312, and a second support wheel 2314 is provided at the end of the second straight section 2312, which is also the free end of the lifting support 23. In this embodiment, the lifting support 23 adopts a multi-bending design to avoid interference from other structures; the bends can also adopt an arc-shaped structure design to avoid the hinge axis of the first pulley 224, while increasing the height difference when the first support lifts the bed board, allowing the lifting support 23 to lift the bed board to a higher height.

[0076] The third pulley is arranged at one end of the support rod and is slidably connected to the first sliding rail. The other end of the support rod is a free end and faces the fourth frame. In this embodiment, the third pulley is slidably connected to the sliding rail, which is different from the fixed connection in the first embodiment. In this embodiment, the first pulley 224, the second pulley 226, the third pulley 227 and the fourth pulley 225 are all movable, and the distance between the first pulley 224 and the fourth pulley remains unchanged. The distance between the third pulley 227 and the fourth pulley remains unchanged. When the push rod motor pushes the bed plate to overturn, all the pulleys move to one side, and the distance between the first pulley 224 and the second pulley and the third pulley becomes smaller and smaller until the distance does not change, and then the first pulley, the second pulley and the third pulley move together. Such an arrangement corresponds to the three stages of lifting the bed plate in the second embodiment. Compared with the previous embodiment, the third pulley in this embodiment cannot be arranged as a fixed point because the movement trajectory of the first and second pulleys passes through the position of the initial third pulley. If the third pulley is a fixed point, the angle of the bed plate will be small. As to why the first and second pulleys pass through the third pulley, it is because in order to reduce the motor thrust, it is necessary to adjust the support wheel to the front end of the back plate. Since the support is too long, it will increase the thrust. Therefore, the first support will be relatively short, and the overall bed plate will have a small lifting height. Therefore, the switching structure needs to be increased, and the second half is formed to be separated from the first support. The whole process needs a long stroke and is easy to pass through the third pulley installation position. However, when the third pulley slides, the original scheme one cannot make the bed frame normally lift. Therefore, the second pulley and the third pulley are connected together so that they can normally lift.

[0077] As shown in Figure 7 One end of the first connecting rod is hingedly connected to the first pulley, and the other end of the first connecting rod is hingedly connected to the middle region of the support rod. The second pulley is arranged between the third pulley and the first pulley, and the second pulley is closer to the first pulley. One end of the second connecting rod is hingedly connected to the second pulley, and the other end of the second connecting rod is hingedly connected to the back of the first bed plate. The second pulley extends outwardly from the eighth frame and the tenth frame and extends to the L-shaped guide rail piece outside the eighth frame and the tenth frame, and the second extension wheel is arranged on the L-shaped guide rail piece.

[0078] The following are the specific steps of lifting the bed plate in the two embodiments.

[0079] In the first embodiment, the process of lifting the bed board is divided into different stages according to the shape of the support rod 231. The first bed board 3 corresponds to the position of the back plate. First, the support rod 231 is linear, and there is only one support wheel, without the design of the height difference after bending, the lifting of the bed board is divided into two stages, lifting stage 1: the push rod motor drives the first moving frame to move towards the direction of the bed tail, which is also the direction of the articulation of the bed back plate and the hip plate. When the first moving frame moves, the first connecting rod 232 and the first pulley 224 move forward, pushing the first support to rise, that is, rotate clockwise, and the first support pushes the back plate to rotate clockwise. The distance between the first pulley 224 and the second pulley 226 gradually decreases until the first pulley 224 and the second pulley 226 come into contact. Lifting stage 2: when the first pulley 224 and the second pulley 226 first come into contact, the pressure between the pulley at the front end of the first support and the first bed board 3 gradually decreases until the pulley of the first support is separated from the first bed board 3. The first moving frame continues to push forward, and then the first bed board 3 is lifted clockwise by the second connecting rod 233. This basic form is relatively traditional design, and its structure is simpler, the number of pulleys in the bottom slide rail is reduced to the first pulley 224 and the second pulley 226, and the third pulley 227 is changed from the sliding design of the traditional design to the fixed design, the installation method is simpler, and the stability is higher. In the traditional design, the number of connecting rods is also more, in this design, only double connecting rods and lifting supports 23 are used, and the lifting parts are also fewer, so the overall cost is reduced.

[0080] The second embodiment, when the support rod 231 has a folded edge and a height difference, the lifting bed plate is divided into three stages, the lifting stage 1: when lifting, the motor drives the upper frame group to move to the right. The first pulley 224 moves to the right, so that the first connecting rod 232 pushes the lifting support 23 to rotate clockwise. At this time, the first support wheel 2313 on the lifting support 23 is in contact with the first bed plate 3, and the second support wheel 2314 is in contact with the first bed plate 3. Lifting stage 2: the first push rod motor 234 continues to push the first moving frame to the right, the second support wheel 2314 is in contact with the first bed plate 3, and the internal force between the first support wheel 2313 and the first bed plate 3 gradually decreases until the first support wheel 2313 is separated from the first bed plate 3. In the whole process, the second pulley 226 and the first support wheel 2313 also move to the right, but the overall moving distance is less than that of the first pulley 224 and the fourth pulley 225. With the continuous pushing of the motor, the distance between the first pulley 224 and the second pulley 226 gradually decreases, until the first connecting rod 232 connected to the first pulley 224 contacts the pin shaft mounting the second pulley 226, at this time the pressure on the second support wheel 2314 gradually decreases. Lifting stage 3: when the first connecting rod 232 connected to the first pulley 224 contacts the pin shaft mounting the second pulley 226, the distance between the second pulley 226 and the first pulley 224 no longer changes, the second extension wheel 228 contacts the L-shaped guide rail piece 229 mounted on the first moving frame, and the force between the second support wheel 2314 and the first bed plate 3 gradually decreases until the second support wheel 2314 is separated from the first bed plate 3. The push rod motor continues to push the first moving frame to move, the second connecting rod 233 continuously pushes the first bed plate 3 to rise, until the first bed plate 3 rises to the maximum angle.

[0081] The first support wheel 2313 can reduce the motor pushing force, and the second support wheel 2314 can also continue to expand the motor's power-saving range after the first support wheel 2313 lifts the bed plate. If there is only the first support wheel 2313, it can only lift 6°, and the next 6° to 60° needs to be supported by the second connecting rod 233, among which the first push rod motor 234 requires a larger pushing force in the 6-15° stage; after the second support wheel 2314 of the support is added, the power-saving stage is increased from 6° to 15°, and if the first support wheel 2313 is removed and only the second support wheel 2314 is retained, the pushing force in the 0 to 2° stage will be much larger than that of the structure retaining the first support wheel 2313.

[0082] The second pulley 226, the extension wheel and the guide rail piece on the upper frame group are arranged to distribute the vertical pressure of the second connecting rod 233 to the guide rail between the first moving frame and the first fixed frame, improving the stability of the second connecting rod 233; the horizontal pressure is distributed to one side of the first pulley 224 and the other side of the first moving frame guide rail piece vertical direction fold edge.

[0083] As Figure 8As shown, specifically, the first bed plate 3 is provided with a first connecting plate 31 hinged to the bottom of the first bed plate 3, the first connecting plate 31 has an area smaller than the first bed plate 3 and is embedded in the first bed plate 3; one end of the second connecting plate 233 is hinged to the first connecting plate 31. When the first bed plate 3 is lifted, the first connecting plate 31 will be separated from the first bed plate 3. In this embodiment, when the electric bed body is flat, the user sometimes needs to put his hand into the space on the back of the first bed plate 3 to repair or take parts. Since the lifting mechanism is hinged to the back of the first bed plate 3, when the first bed plate 3 is manually lifted, the lifting mechanism will be lifted together, which not only requires more force, but also has the risk of pinching the hand. Now the lifting mechanism is connected in the middle of the first bed plate 3, and the first connecting plate 31 hinged to the lower edge of the first bed plate 3, when the first bed plate 3 is lifted, the first connecting plate 31 connected with the lifting mechanism will naturally drop due to its gravity, and separate from the first bed plate 3, which not only reduces the weight of the first bed plate 3, but also prevents the risk of pinching the hand that may occur.

[0084] The above is an embodiment of the head structure of the bed body, and the following is an embodiment of the lifting structure of the tail of the bed body, which can be applied to the first embodiment and the second embodiment.

[0085] Specifically, it also includes a second rectangular bed frame, a second lifting mechanism 7 arranged in the second rectangular bed frame, and a second bed plate 5 and a third bed plate 6 arranged above the second rectangular bed frame and hinged to each other; the second lifting mechanism 7 includes a second fixed frame 71, a lifting bracket 73, and a second moving frame 72 arranged inside the second fixed frame 71, the second moving frame 72 can slide in the second fixed frame 71; one end of the lifting bracket 73 is connected with the second fixed frame 71, and the other end is hinged to the second bed plate 5; the lifting bracket 73 lowers or lifts the second bed plate 5 and the third bed plate 6 by reciprocating sliding of the second moving frame 72. The third bed plate is connected with the second rectangular bed frame through a third connecting plate 74; the lifting bracket 73 lowers or lifts the second bed plate and the third bed plate by reciprocating sliding of the second moving frame.

[0086] In this embodiment, the second bed board 5 and the third bed board 6 generally correspond to the rear half of the bed body, i.e. the hip board and the leg board. By moving the second moving frame 72 towards the head of the bed, the lifting support 73 lifts the second bed board 5, and the third bed board 6 is hinged to one side of the second bed board 5 and hinged to the rectangular frame through a connecting rod on the other side. The lifted second bed board 5 also lifts one end of the third bed board 6, thereby achieving simultaneous lifting of the second bed board 5 and the third bed board 6. When the second lifting mechanism 7 is in the flat state, the second moving frame 72 is hinged to one end of the first top rod 731, and the other end of the first top rod 731 is hinged to the second top rod 732.

[0087] The outer side of the eighth surrounding edge and the tenth surrounding edge is provided with a stop pin, which abuts against the bottom of the first top rod when the first top rod is flat. When flat, a stop pin 727 is also provided below the hinge point of the first top rod 731 and the second top rod 732 to prevent the first top rod 731 and the second top rod 732 from being flipped in the opposite direction. In the flat state, the thickness of the second lifting mechanism 7 is also not greater than the thickness of the second rectangular frame 4, consistent with the previous rectangular frame. From the outside, only the thickness of the bed frame can be seen, and the lifting mechanism cannot be seen, so the overall thickness becomes thinner and more beautiful.

[0088] As shown in Figure 9 , 10 specifically, the second rectangular frame 4 includes a first surrounding edge 41, a second surrounding edge 42, a third surrounding edge 43, and a fourth surrounding edge 44; the second fixed frame 71 is in the shape of the Chinese character 'n' and includes a fifth surrounding edge 711, a sixth surrounding edge 712, and a seventh surrounding edge 713 connected in sequence; the fifth surrounding edge 711 and the seventh surrounding edge 713 are arranged in parallel, and the two ends are connected to the second surrounding edge 42 and the sixth surrounding edge 712, respectively; the second moving frame 72 is in the shape of the Chinese character 'n' and includes an eighth surrounding edge 721, a ninth surrounding edge 722, and a tenth surrounding edge 723 connected in sequence; the outer sides of the eighth surrounding edge 721 and the tenth surrounding edge 723 are provided with a fifth pulley 724 and a sixth pulley 725 at the two ends, respectively; the inner sides of the fifth surrounding edge 711 and the seventh surrounding edge 713 are provided with a second sliding rail 726 matched with the fifth pulley 724 and the sixth pulley 725; the lifting support 73 includes a first top rod 731 and a second top rod 732 symmetrically arranged on the left and right, and a second push rod motor 733; one end of the first top rod 731 is hingedly connected to one end of the eighth surrounding edge 721, and the other end of the first top rod 731 is hingedly connected to one end of the second top rod 732; the other end of the second top rod 732 is connected to the back of the second bed board 5; the side of the first top rod 731 close to the second top rod 732 has an upwardly bent folded edge, and the folded edge end is hingedly connected to the second top rod 732; the length of the second top rod 732 is less than the length of the first top rod 731.

[0089] The first top rod in the embodiment is followed by a hingedly arranged shorter second top rod for lifting the bed plate, which can increase the power arm and reduce the motor thrust. If only the first top rod is used, the maximum angle cannot reach 40°, and after the introduction of the second top rod, the lifting mechanism can have a larger power arm while having sufficient length to make the leg plate, i.e., the second bed plate, reach 45°, which can better meet the needs of users for leg lifting.

[0090] Further, the second top rod is in a V-shaped or N-shaped structure, and the first top rod is hingedly arranged in the middle of the two side pieces, and the middle part is used for abutting against the first top rod after lifting. In the embodiment, the second top rod has a structure of two vertical pieces plus a middle horizontal beam piece, the first top rod is clamped in the middle of the two side pieces of the second top rod and is hingedly arranged at one end of the second top rod, and then the middle piece is mainly used for abutting against the upper end of the first top rod after lifting. In this way, it can be prevented that the second top rod may be reversely lowered due to the position of its own gravity center after lifting the bed plate, so that the first top rod can clamp the lowered position to prevent the second top rod from failing to lift the bed plate.

[0091] In the embodiment, the second lifting mechanism 7 is mainly responsible for lifting the third bed plate 6 and the second bed plate 5, and is also lifted by the sliding between the second moving frame and the second fixed frame. Compared with the traditional structure, the number of parts is small, the installation is convenient, and the thickness of the bed body is greatly reduced. The movement principle is also mainly divided into two stages. The lifting stage 1: the second push rod motor 733 drives the second moving frame 72 to move away from the bed foot. The first top rod 731 hingedly arranged with the second moving frame 72 rotates clockwise, thereby pushing the leg plate to rise until the lower side of the first top rod 731 collides with the lower edge of the second top rod 732. The lifting stage 2: when the lower side of the first top rod 731 collides with the lower edge of the second top rod 732, the first top rod 731 and the second top rod 732 cannot continue to rotate, at this time, the second top rod 732 rotates clockwise around the hinge point of the leg plate, and continues to push the leg plate to rise until the maximum angle is reached.

[0092] Specifically, the second bed plate 5 is provided with a second connecting plate 51 hingedly arranged in the middle thereof, the area of the second connecting plate 51 is smaller than that of the second bed plate 5, and the second connecting plate 51 is embedded in the second bed plate 5; the second connecting plate 51 is hingedly arranged with one end of the second top rod 732. When the second bed plate 5 is lifted, the second connecting plate 51 will be separated from the second bed plate 5. In the embodiment, the relationship and function of the second connecting plate 51 and the second bed plate 5 are the same as those of the first connecting plate 31 and the first bed plate 3, which are used for the function of preventing hand clamping.

[0093] The second rectangular frame and the matching lifting mechanism of the embodiment are mainly used for lifting or lowering the leg plate of the bed body, the structure is simpler and more practical relative to the prior art, the manufacturing difficulty is reduced, and the corresponding production capacity can be further improved.

[0094] The foregoing description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the patent application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the patent application. Thus, the present patent application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0095] Moreover, while advantages associated with some implementations of the technology have been described in the context of those implementations, other implementations can also exhibit such advantages, and not all implementations need necessarily exhibit such advantages to fall within the scope of the technology. Accordingly, the disclosure and associated technology can include other implementations not expressly shown or described herein. Thus, the disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1.A lifting mechanism of a bed frame, comprising: a first rectangular bed frame, a first lifting mechanism arranged in the first rectangular bed frame, and a first bed plate and a second bed plate arranged above the first rectangular bed frame and hinged to each other; the first lifting mechanism comprising a first fixed frame, a lifting support, and a first moving frame arranged inside the first fixed frame and slidable in the first fixed frame; one end of the lifting support is connected to the first fixed frame in a sliding manner, and the other end is hinged to the first bed plate; the second bed plate is connected to the first rectangular bed frame through a third connecting rod; and the lifting support lowers or raises the first bed plate and the second bed plate through reciprocating sliding of the first moving frame. 2.The lifting mechanism of a bed frame according to claim 1, wherein: the first fixed frame is in the shape of a N, comprising a fifth surrounding edge, a sixth surrounding edge, and a seventh surrounding edge connected in sequence; the fifth surrounding edge and the seventh surrounding edge are arranged in parallel, and two ends thereof are connected to the second surrounding edge and the sixth surrounding edge, respectively; the first moving frame is in the shape of a N, comprising an eighth surrounding edge, a ninth surrounding edge, and a tenth surrounding edge connected in sequence; two ends of the eighth surrounding edge and the tenth surrounding edge outside are provided with a fifth pulley and a sixth pulley, respectively; the inside of the fifth surrounding edge and the seventh surrounding edge is provided with a second sliding rail matched with the fifth pulley and the sixth pulley; the lifting support comprises a first lifting rod, a second lifting rod, and a second push rod motor which are symmetrical to each other; one end of the first lifting rod is hingedly connected to one end of the eighth surrounding edge, and the other end of the first lifting rod is hingedly connected to one end of the second lifting rod; the other end of the second lifting rod is connected to the back of the second bed plate; the side of the first lifting rod close to the second lifting rod has a folded edge bent upward, and the end of the folded edge is hingedly connected to the second lifting rod; and the length of the second lifting rod is less than the length of the first lifting rod. 3.The lifting mechanism of a bed frame according to claim 2, wherein: the structure of the second lifting rod is in the shape of a V or a N, and the middle of the two sides of the second lifting rod is hingedly connected to the first lifting rod, and the middle part is used for abutting against the first lifting rod after lifting. 4.The lifting mechanism of a bed frame according to claim 3, wherein: the outside of the eighth surrounding edge and the tenth surrounding edge is provided with a stop pin, and the stop pin abuts against the bottom of the first lifting rod when the first lifting rod is flat. 5.The lifting mechanism of a bed frame according to claim 4, wherein: the second bed plate is provided with a second connecting plate hingedly connected to the bottom of the second bed plate, the area of the second connecting plate is less than that of the second bed plate, and the second connecting plate is embedded in the second bed plate; the second connecting plate is hingedly connected to one end of the second lifting rod; and when the second bed plate is lifted, the second connecting plate will be separated from the second bed plate. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Images