Lifting mechanism of bed frame

Abstract

The invention relates to a lifting mechanism, in particular to a lifting mechanism of a bed frame. The first lifting mechanism is arranged in the first rectangular bed frame; the first bed board is erected above the first rectangular bed frame; the first lifting mechanism comprises a first fixed frame, a lifting support and a first movable frame arranged in the first fixed frame, and the first movable frame can slide in the first fixed frame. One end of the lifting support is in sliding connection with the first fixing frame, and the other end of the lifting support is a free end. The lifting support lowers or lifts the first bed board through reciprocating sliding of the first moving frame. The bed board can be effectively lifted to a higher height through staged work of the lifting mechanism, 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, and in particular to a lifting mechanism for a bed frame. Background Art

[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 aesthetics and space utilization. Traditional bed frame designs often have the problem of high thickness, which not only affects the overall aesthetics of the bedroom, but also takes up valuable indoor space. Therefore, the market demand for ultra-thin bed frames is growing.

[0003] However, the design of an ultra-thin bed frame is not an easy task. Due to the significant reduction in the thickness of the bed frame, the stress distribution and load-bearing capacity of the bed frame face severe challenges. In order to achieve the lifting function of the ultra-thin bed frame, a precise lifting structure is usually required. But 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 requires the motor to bear a greater load, and the required motor thrust also increases. To solve this problem, some manufacturers try to use multiple motors to lift the bed board, but this approach not only increases manufacturing costs, but also brings the problem of motor synchronous control.

[0004] In addition, the design of ultra-thin bed frames also needs to consider the safety and user experience of the user. Traditional bed frame structures may have the risk of pinching fingers during the lifting process, especially when the bed frame is raised, the user's fingers are easily pinched 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 gaps in ultra-thin bed frames are often smaller, which is more likely to cause finger pinching accidents. Summary of the invention

[0005] The purpose of this application is to overcome one of the shortcomings of the prior art and to propose an improved lifting structure, which mainly reduces the overall thickness of the bed through simplification and innovative design of the lifting structure, while also reducing the installation difficulty and manufacturing cost of this type of structure.

[0006] A lifting mechanism for a bed frame,

[0007] a first rectangular bed frame, and a first lifting mechanism disposed within the first rectangular bed frame;

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

[0009] The first lifting mechanism includes a first fixed frame, a lifting bracket and a first movable frame arranged inside the first fixed frame, and the first movable frame can slide inside the first fixed frame;

[0010] One end of the lifting bracket is slidably connected to the first fixed frame, and the other end is a free end;

[0011] The lifting bracket raises or lowers the first bedplate by the reciprocating sliding of the first moving frame.

[0012] Further, the first fixed frame is U-shaped and includes a fifth frame, a sixth frame, and a seventh frame connected in sequence;

[0013] The fifth frame and the seventh frame are arranged in parallel, and the first fixed frame and the fourth frame enclose a rectangle;

[0014] The first moving frame is U-shaped and includes an eighth frame, a ninth frame, and a tenth frame connected in sequence;

[0015] A first pulley and a fourth pulley are respectively arranged on the outer sides of the mutually parallel eighth frame and tenth frame, and first slide rails matching the first pulley and the fourth pulley are arranged on the inner sides of the fifth frame and the seventh frame;

[0016] The lifting bracket includes symmetrically arranged left and right support rods, symmetrically arranged left and right first connecting rods and second connecting rods, and a first push rod motor;

[0017] One end of the first push rod motor is fixedly connected to the fourth frame, and the other end of the first push rod motor is fixedly connected to the ninth frame. The first push rod can push the first moving frame to move within the first fixed frame.

[0018] Further, a third pulley is arranged at one end of the support rod. The third pulley is fixedly connected within the first slide rail, and the other end of the support rod is a free end facing the fourth frame;

[0019] One end of the first connecting rod is hinged to the first pulley, and the other end of the first connecting rod is hinged to the middle area of the support rod;

[0020] 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 hinged to the second pulley, and the other end is hinged to the back of the first bedplate;

[0021] The second pulley extends towards the outer sides of the eighth frame and the tenth frame and extends to the L-shaped guide rail pieces on the outer sides of the eighth frame and the tenth frame. The L-shaped guide rail pieces are provided with second extension wheels.

[0022] Furthermore, the support rod includes a first straight portion and a second straight portion, and the two straight portions are bent at an obtuse angle; a first support wheel is provided at the intersection of the first straight portion and the second straight portion, and the end of the second straight portion, which is also the free end of the lifting support, is provided with the second support wheel.

[0023] A third pulley is provided at one end of the support rod, and the third pulley is slidably connected to the first slide rail. The other end of the support rod is a free end facing the fourth frame.

[0024] One end of the first connecting rod is hinged to the first pulley, and the other end of the first connecting rod is hinged to the middle area of ​​the bracket rod;

[0025] A second pulley is provided 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 hinged to the second pulley, and the other end is hinged to the back of the first bed board;

[0026] The second pulley extends toward 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 on the L-shaped guide rail piece.

[0027] Furthermore, a first connecting plate is provided in the middle of the first bed board and is hinged to its bottom. The area of ​​the first connecting rod is smaller than that of the first connecting plate and is embedded in the first bed board. The first connecting plate is hinged to one end of the second connecting rod respectively. When the first bed board is lifted, the first connecting plate will be detached from the first bed board.

[0028] Furthermore, it also includes a second rectangular bed frame, and a second lifting mechanism disposed in the second rectangular bed frame;

[0029] and a second bed board and a third bed board which are hinged to each other and mounted above the second rectangular bed frame;

[0030] The second lifting mechanism comprises a second fixed frame, a lifting bracket and a second movable frame arranged inside the second fixed frame, and the second movable frame can slide inside the second fixed frame;

[0031] One end of the lifting bracket is slidably connected to the fixed frame, and the other end is hinged to the second bed board;

[0032] The third bed board is connected to the second rectangular bed frame via a third connecting rod;

[0033] The lifting bracket lowers or raises the second bed board and the third bed board through the reciprocating sliding of the second moving frame.

[0034] Further, the fixed frame is U-shaped and includes a fifth side, a sixth side, and a seventh side that are connected in sequence;

[0035] The fifth side and the seventh side are arranged in parallel and are respectively connected to the second side and the sixth side at both ends;

[0036] The moving frame is U-shaped and includes an eighth side, a ninth side, and a tenth side that are connected in sequence;

[0037] Fifth pulleys and sixth pulleys are respectively arranged at both outer ends of the eighth side and the tenth side, and second slide rails matching the fifth pulleys and the sixth pulleys are arranged on the inner sides of the fifth side frame and the seventh side frame;

[0038] The jacking support includes symmetrically arranged first jacking rods, second jacking rods, and second push rod motors on the left and right;

[0039] One end of the first jacking rod is hinged to one end of the eighth side, and the other end of the first jacking rod is hinged to one end of the second jacking rod; the other end of the second jacking rod is connected to the back of the second bed board; a folded edge that bends upward is provided on one side of the first jacking rod close to the second jacking rod, and the folded edge end is hinged to the second jacking rod, and the length of the second jacking rod is less than the length of the first jacking rod.

[0040] Further, a second connecting plate hinged to the bottom of the second bed board is arranged in the middle of the second bed board, and the area of the second connecting plate is smaller than that of the second bed board and is embedded in the second bed board; the second connecting plate is respectively hinged to one end of the second jacking rod; when the second bed board is lifted, the second connecting plate will be separated from the second bed board.

[0041] Advantages of the present invention:

[0042] 1) Through the staged operation of the lifting mechanism, the bed board can be effectively lifted to a higher height, and at the same time, the working load of the motor can be reduced, the structure can be simplified, and the installation is convenient; at the same time, compared with the traditional technology, the product cost can be further saved.

[0043] 2) By designing the folded edge and arc of the support rod, the lifting angle of the lifting mechanism can be made larger, and the power consumption of the motor can be lower. Description of the drawings

[0044] Figure 1 Structural schematic diagram of the first rectangular frame in the embodiment of the present invention Figure 1 ;

[0045] Figure 2 Structural schematic diagram of the first rectangular frame in the embodiment of the present invention Figure 2 ;

[0046] Figure 3 It is a schematic diagram of the structure after the first rectangular frame is lifted in an embodiment of the present invention;

[0047] Figure 4 It is a side view of the first rectangular frame after it is lifted in the embodiment of the present invention;

[0048] Figure 5 Schematic diagram of the structure of the second extension wheel and the L-shaped guide rail piece in an embodiment of the present invention;

[0049] Figure 6 A side view of the folding support rod after it is lifted in the embodiment of the present invention;

[0050] Figure 7 It is a schematic diagram of the structure after the folding support rod is lifted in an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of the structure of the first connecting plate in an embodiment of the present invention;

[0052] Fig. 9 This is a schematic diagram of a second rectangular frame structure in an embodiment of the present invention;

[0053] Fig.10 is a side view of a second rectangular frame in an embodiment of the present invention;

[0054] Fig.11 Schematic diagram of the rotating structure of the lifting bracket in an embodiment of the present invention;

[0055] Fig.12 This is a schematic diagram of the structure of the second connecting plate in an embodiment of the present invention;

[0056] Figure numerals: 1 first rectangular bed frame; 11 first frame; 12 second frame; 13 third frame; 14 fourth frame; 2 first lifting mechanism; 21 first fixed frame; 211 fifth frame; 212 sixth frame; 213 seventh frame; 214 first slide rail; 22 first movable frame; 221 eighth frame; 222 ninth frame; 223 tenth 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 bracket; 231 bracket rod; 2311 first straight portion; 2312 second straight portion; 2313 first bracket wheel; 2314 second bracket wheel; 232 first Connecting rod; 233 second connecting rod; 234 first push rod motor; 3 first bed board; 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 board; 51 second connecting plate; 6 third bed board; 7 second lifting mechanism; 71 second fixed frame; 711 fifth surrounding edge; 712 sixth surrounding edge; 713 seventh surrounding edge; 72 second movable frame; 721 eighth surrounding edge; 722 ninth surrounding edge; 723 tenth surrounding edge; 724 fifth pulley; 725 sixth pulley; 726 second slide rail; 727 stop pin; 73 lifting bracket; 731 first push rod; 732 second push rod; 733 second push rod motor; 74 third connecting rod. DETAILED DESCRIPTION

[0057] The features of the present application are further described below in conjunction with embodiments.

[0058] The specific structural and functional details disclosed herein are merely representative and are for the purpose of describing exemplary embodiments of the present application. However, the present application can be implemented in many alternative forms and should not be interpreted as being limited to only the embodiments set forth herein.

[0059] First embodiment

[0060] like Figure 1As shown in the figure, a lifting mechanism for a bed frame, a first rectangular bed frame 1, a first lifting mechanism 2 arranged inside the rectangular bed frame; and a first bed board 3 erected above the first rectangular bed frame 1; the first lifting mechanism 2 includes a first fixed frame 21, a lifting support 23 and a first moving frame 2 arranged inside the first fixed frame 21, and the first moving frame 2 can slide inside 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 slidably connected to the first fixed frame 21, and the other end is a free end; the lifting support 23 lowers or raises the first bed board 3 by the reciprocating sliding of the first moving frame 2. In this 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. When viewed from the outside of the bed body, the components of the first lifting mechanism 2 can be blocked by the first rectangular bed frame 1, so that an ultra-thin electric bed with only the thickness of the bed frame can be formed.

[0061] Specifically, the first rectangular frame includes 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 a U shape and includes 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 enclose a rectangle; as Figure 2 shown, the first moving frame 2 is in a U shape and includes an eighth side frame 221, a ninth side frame 222 and a tenth side frame 223 connected in sequence; first pulleys 224 and fourth pulleys 225 are respectively arranged on the outer sides of the mutually parallel eighth side frame 221 and tenth side frame 223, and first slide rails 224 are arranged on the inner sides of the fifth side frame 211 and the seventh side frame 213 and are matched with the first pulleys 224 and the fourth pulleys 225. In this embodiment, the first pulleys 224 and the fourth pulleys 225 are arranged on the outside of the first moving frame 2 so that the moving frame can slide within the range of the fixed frame. This is an important basis for using the lifting support 23 and the second connecting rod 233 to lift the first bed board 3.

[0062] As Figure 3 、 4 shown, the lifting support 23 includes symmetrically arranged support rods 231 on the left and right, symmetrically arranged first connecting rods 232 and second connecting rods 233 on the left and right, 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 symmetrically arranged on the left and right.

[0063] One end of the first push rod motor 234 is fixedly connected to the fourth frame 14, and the other end of the first push rod motor 234 is fixedly connected to the ninth frame 222. The first push rod can push the first mobile frame 2 to move within the first fixed frame 21. In this embodiment, a push rod motor is used to give the mobile frame a thrust to move. Of course, the movement of the mobile frame is not limited to thrust, and can also be replaced by a corresponding pulling force.

[0064] A third pulley 227 is provided at one end of the support rod 231, and the third pulley 227 is fixed in the first slide rail 224; the other free end of the support rod 231 faces the fourth 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 slide rail 224 and cannot move forward and backward along the slide rail. When the mobile frame moves toward the third pulley 227, it will drive the support rod 231 to rotate clockwise, thereby lifting the first bed board 3. The third pulley 227 is a fixed part in this embodiment. Although it is named with a pulley, it does not have the function of a pulley. In another embodiment, the third pulley is a part with a sliding function. Since the initial position and connection method of the part in the two embodiments are similar, the names of other parts are not changed.

[0065] One end of the first connecting rod 232 is hinged to the first pulley 224, and the other end of the first connecting rod 232 is hinged to the middle area of ​​the support rod 231. In this embodiment, the main function of the first connecting rod 232 is to lift the support rod 231 through its own movement, so that it moves clockwise, thereby driving the first bed board 3 to lift up.

[0066] A second pulley 226 is provided between the third pulley 227 and the first pulley 224. The second pulley 226 is closer to the first pulley 224. One end of the second connecting rod 233 is hinged to the second pulley 226, and the other end is hinged to the back of the first bed board 3. In this embodiment, the second connecting rod 233 is also used to lift the first bed board 3, but its lifting angle is larger than the angle of the supporting rod 231 lifting the bed board. It mainly relies on the push of the first pulley 224. After moving a distance, the second pulley 226 will contact the second pulley 226 because the distance between the second pulley 226 and the first pulley 224 is relatively close, thereby driving the second pulley 226 to continue to move. Since the second connecting rod 233 is also hinged to the back of the first bed board 3, when the bed board is lifted by the supporting rod 231, the second connecting rod 233 will also be lifted, until the bed board is lifted to be separated from the supporting rod 231, and then the lifted second connecting rod 233 will continue to lift the bed board to a larger angle range, giving users a better bed board lifting experience. Therefore, there are two sequential stages for the support rod 231 and the second connecting rod 233 to lift the bed board, which correspond to different angle ranges of the bed board rising.

[0067] like Figure 5 As shown, the second pulley 226 extends toward the outer side of the eighth frame 221 and the tenth frame 223, and extends to the L-shaped guide piece 229 on the outer side of the eighth frame 21 and the tenth frame 223, and the L-shaped guide piece 229 is provided with the second extension wheel 228. In this embodiment, the second extension wheel 228 is coaxially connected with the second pulley 226 and mounted on the L-shaped guide piece 229 on the outer side of the moving frame, and 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 toward one side, so as to provide better support for the bed board.

[0068] In summary, the characteristics of the lifting mechanism in the flat state. The first pulley 224 and the fourth pulley 225 are installed at both ends of the mobile frame, and are slidably connected to the fixed frame, so that the mobile frame can move forward and backward along the slide rail on the fixed frame. The first pulley 224 is located on the side of the mobile frame close to the head, and the first connecting rod 232 is hinged on the inner side of the first pulley 224, and the first connecting rod 232 is hinged to the middle position of the lifting bracket 23. Therefore, the first bracket wheel 2313 only has the degree of freedom in the front and rear directions. A bracket pulley is hinged above the lifting bracket 23. In the flat state, the bracket wheel is tangent to the back of the first bed board 3. There is a second pulley 226 between the first pulley 224 and the bracket pulley, and there is a connecting rod between the second pulley 226 and the bracket pulley. A second extension wheel 228 is provided between the second pulley 226 and the mobile frame, and the second extension wheel 228 is mounted on the L-shaped guide rail 229 on the mobile frame. In the lifting stage, the second extension wheel 228 slides on it.

[0069] The L-shaped guide piece 229 in this structure can ensure that when the first pulley is in contact with the L-shaped guide rail, it can receive the thrust from the moving frame and withstand the pressure from the second connecting rod, thereby preventing the first pulley from contacting the second pulley, thereby avoiding increasing the internal force and damaging the two pulleys.

[0070] Regarding the first embodiment, the movement between the pulleys can be summarized as follows: the distance between the first pulley 224 and the fourth pulley 225 does not change, and they translate at the same time; the distance between the first pulley 224 and the second pulley 226 continues to decrease until the distance between the first pulley 224 and the second pulley 226 maintains a certain 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, and the third pulley 227 always maintains its position unchanged.

[0071] Second embodiment

[0072] The structures not mentioned in this embodiment are the same as those in the first embodiment. In this embodiment, a different structure is used on the lifting bracket.

[0073] like Figure 6 As shown, specifically, the support rod 231 includes a first straight portion 2311 and a second straight portion 2312, and the two straight portions are bent at an obtuse angle; a first support wheel 2313 is provided at the intersection of the first straight portion 2311 and the second straight portion 2312, and a second support wheel 2314 is provided at the end of the second straight portion 2312, which is also the free end of the lifting support 23. In this embodiment, the lifting support 23 adopts a multiple bending design to avoid interference from other structures; the corner can also adopt an arc 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, so that the lifting support 23 can lift the bed board to a higher height.

[0074] A third pulley is provided at one end of the support rod, and the third pulley is slidably connected in the first slide rail, and the other end of the support rod is a free end, facing the fourth frame; in this embodiment, the connection between the third pulley and the slide rail is a sliding connection, 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 can all move, 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 225 remains unchanged. When the push rod motor pushes the bed board to flip, and all the pulleys move to one side, the distance between the first pulley 224 and the second pulley and the third pulley continues to decrease until the distance does not change, and then the first pulley, the second pulley, the third pulley and the fourth pulley move together. This setting corresponds exactly to the three stages of lifting the bed board in the second embodiment. Compared with the previous embodiment, the third pulley in this embodiment cannot be set as a fixed point because during the movement, the movement trajectory of the first and second pulleys passes through the initial position of the third pulley. If the third pulley is a fixed point, the bed board will be lifted at a very small angle. As for why the first and second pulleys pass through the third pulley, it is because in order to reduce the thrust of the motor, the bracket wheel needs to be adjusted to the front end of the back board. Since the thrust will increase if the bracket is too long, the first bracket will be relatively short, and the overall bed board lifting height will be small. Therefore, a switching structure needs to be added, and the second half will be separated from the first bracket. The whole process requires a longer stroke and is easy to pass through the installation position of the third pulley; however, when the third pulley slides, the original plan 1 cannot make the bed frame rise and fall normally; therefore, the second pulley is connected to the third pulley so that it can rise and fall normally.

[0075] like Figure 7As shown, one end of the first connecting rod is hinged to the first pulley, and the other end of the first connecting rod is hinged to the middle area of ​​the bracket rod; a second pulley is provided 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 hinged to the second pulley, and the other end is hinged to the back of the first bed board; the second pulley extends toward the outside of the eighth frame and the tenth frame, and extends to the L-shaped guide rail piece on the outside of the eighth frame and the tenth frame, and the second extension wheel is on the L-shaped guide rail piece.

[0076] The following are the specific steps of lifting the bed board in two embodiments.

[0077] 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 board. First, the support rod 231 is straight and has only one support wheel, and does not include the height difference design after bending. The lifting of the bed board is divided into two stages. Lifting stage 1: The push rod motor pushes the moving frame toward the end of the bed, which is generally the direction in which the back board and the buttocks board are hinged. When the moving frame moves, the first connecting rod 232 and the first pulley 224 move forward, pushing the first bracket to lift, that is, rotating in a clockwise direction, and the first bracket pushes the back board to rotate clockwise. The distance between the first pulley 224 and the second pulley 226 gradually decreases until the first pulley 224 contacts the second pulley 226. Lifting stage 2: When the first pulley 224 and the second pulley 226 first contact, the pressure between the pulley at the front end of the first bracket and the first bed board 3 gradually decreases until the pulley of the first bracket is separated from the first bed board 3. The moving frame continues to push forward, and then the second connecting rod 233 pushes the first bed board 3 to lift clockwise. Compared with the traditional design, this basic form has a simpler structure. The number of pulleys in the bottom slide rail is reduced to the first pulley 224 and the second pulley 226. The third pulley 227 is changed from the sliding design of the traditional design to a fixed design, which makes the installation method simpler and more stable. In the traditional design, the number of connecting rods will also be more. In this design, only double connecting rods and lifting brackets 23 are used, and there are fewer lifting parts, which reduces the overall cost.

[0078] In the second embodiment, when the bracket rod 231 has a folded edge and a height difference, the lifting of the bed board is divided into three stages. Lifting stage 1: When lifting, the motor pushes the upper frame group to move to the right. As the first pulley 224 moves to the right, the first connecting rod 232 pushes the lifting bracket 23 to rotate clockwise. At this time, the first bracket wheel 2313 on the lifting bracket 23 contacts the first bed board 3 until the second bracket wheel 2314 contacts the first bed board 3. Lifting stage 2: The first push rod motor 234 continues to push the moving frame to the right, the second bracket wheel 2314 contacts the first bed board 3, and the internal force between the first bracket wheel 2313 and the first bed board 3 gradually decreases until the first bracket wheel 2313 is separated from the first bed board 3. During the whole process, the second pulley 226 and the first bracket wheel 2313 also move to the right, but the overall moving distance is less than the first pulley 224 and the fourth pulley 225. As the motor continues to push, the distance between the first pulley 224 and the second pulley 226 gradually decreases until the first connecting rod 232 hinged on the first pulley 224 contacts the pin on which the second pulley 226 is installed, and the pressure on the second bracket wheel 2314 gradually decreases. Lifting stage 3: When the first connecting rod 232 hinged on the first pulley 224 contacts the pin on which the second pulley 226 is installed, 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 229 installed on the mobile frame, and the force between the second bracket wheel 2314 and the first bed board 3 gradually decreases until the second bracket wheel 2314 is separated from the first bed board 3. The push rod motor continues to push the mobile frame to move, and the second connecting rod 233 continuously pushes the first bed board 3 to rise until the first bed board 3 rises to the maximum angle.

[0079] The first and second bracket wheels 2314 are arranged on the front side. The first bracket wheel 2313 can reduce the thrust of the motor, and the second bracket wheel 2314 can also continue to expand the labor-saving range of the motor after the first bracket wheel 2313 lifts the bed board. For example, when there is only the first bracket wheel 2313, it can only be lifted 6°, and the subsequent 6° to 60° need to be supported by the second connecting rod 233. In the 6-15° stage, the thrust of the first push rod motor 234 is required to be relatively large; after the second bracket wheel 2314 is supported, the labor-saving stage is increased from 6° to 15°. If the first bracket wheel 2313 is removed and only the second bracket wheel 2314 is retained, the thrust in the 0 to 2° stage is much greater than that of retaining the first bracket wheel 2313 structure.

[0080] The second pulley 226 is arranged together with the extension wheel and the guide rail piece on the upper frame assembly to distribute the vertical pressure of the second connecting rod 233 to the guide rail between the mobile frame and the fixed frame, thereby improving the stability of the second connecting rod 233; the horizontal pressure is distributed to the first pulley 224 on one side and to the folded edge in the vertical direction of the guide rail piece of the mobile frame on the other side.

[0081] like Figure 8As shown, specifically, the first connecting plate 31 hinged to the bottom of the first bed board 3 is provided in the middle of the first bed board 3, the area of ​​the first connecting rod 232 is smaller than the first connecting plate 31, and is embedded in the first bed board 3; the first connecting plate 31 is hinged to one end of the second connecting rod 233 respectively. When the first bed board 3 is lifted, the first connecting plate 31 will be separated from the first bed board 3. In this embodiment, when the electric bed body is laid flat, the user sometimes needs to reach into the space on the back of the first bed board 3 to repair or take parts. Since the lifting mechanism is hinged to the back of the first bed board 3, when the first bed board 3 is manually lifted, the lifting mechanism will be lifted together, which not only requires greater force, but also has the risk of pinching hands. Now the lifting mechanism is connected to the first connecting plate 31 hinged to the lower side of the first bed board 3 in the middle of the first bed board 3. When the first bed board 3 is lifted, the first connecting plate 31 connected to the lifting mechanism will naturally drop due to its gravity and separate from the first bed board 3. This not only reduces the weight of the first bed board 3, facilitates lifting, but also prevents the risk of pinching hands that may occur.

[0082] The above is an embodiment of the bed head structure, and the following is an embodiment of the bed foot lifting structure, which can be applied to the first embodiment and the second embodiment.

[0083] 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 board 5 and a third bed board 6 which are hinged to each other and are erected above the second rectangular bed frame; the second lifting mechanism 7 includes a second fixed frame 71, a lifting bracket 731 and a second movable frame 72 arranged inside the second fixed frame 71, and the second movable frame 72 can slide in the second fixed frame 71; one end of the lifting bracket 731 is slidably connected to the fixed frame, and the other end is hinged to the second bed board 5; the lifting bracket 731 lowers or raises the second bed board 5 and the third bed board 6 through the reciprocating sliding of the second movable frame 72. The third bed board is connected to the second rectangular bed frame through a third connecting rod 74; the lifting bracket 731 lowers or raises the second bed board and the third bed board through the reciprocating sliding of the second movable frame.

[0084] In this embodiment, the second bed board 5 and the third bed board 6 generally correspond to the rear half of the bed body, that is, the hip board and the leg board. By moving the second moving frame 72 in the direction of the head of the bed, the lifting support 731 is driven to lift the second bed board 5. Since the third bed board 6 is hinged to one side of the second bed board 5, and there is a connecting rod on the other side hinged to the rectangular frame. The lifted second bed board 5 will also lift one end of the third bed board 6, so as to realize the 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 ejector rod 731, and the other end of the first ejector rod 731 is hinged to the second ejector rod 732. When placed flat, a stop pin is also provided below the hinge point of the first ejector rod 731 and the second ejector rod 732 to prevent the first ejector rod 731 and the second ejector rod 732 from reversing. When in the flat state, the thickness of the second lifting mechanism 7 is not greater than the thickness of the second rectangular frame 4, which is consistent with the previous rectangular frame. Overall, when viewed from the outside, only the thickness of the bed frame can be seen, and the lifting mechanism cannot be seen, making the overall thickness thinner and more beautiful.

[0085] As Fig. 9 , 10 shown, 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 a U shape 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 both ends are respectively connected to the second surrounding edge 42 and the sixth surrounding edge 712; the second moving frame 72 is in a U shape and includes an eighth surrounding edge 721, a ninth surrounding edge 722 and a tenth surrounding edge 723 connected in sequence; fifth pulleys 724 and sixth pulleys 725 are respectively arranged at both ends outside the eighth surrounding edge 721 and the tenth surrounding edge 723, and second slide rails 726 matching the fifth pulleys 724 and the sixth pulleys 725 are arranged on the inner sides of the fifth frame edge 211 and the seventh frame edge 213; the lifting support 731 includes symmetric first ejector rods 731 and second ejector rods 732 on the left and right, and a second push rod motor 733; one end of the first ejector rod 731 is hinged to one end of the eighth surrounding edge 721, and the other end of the first ejector rod 731 is hinged to one end of the second ejector rod 732; the other end of the second ejector rod 732 is connected to the back of the second bed board 5; the first ejector rod 731 has a folded edge bent upward on the side close to the second ejector rod 732, and the folded edge end is hinged to the second ejector rod 732, and the length of the second ejector rod 732 is less than the length of the first ejector rod 731.

[0086] In this embodiment, a relatively short second ejector rod is hingedly arranged after the first ejector rod to lift the bed board, which can increase the power arm and reduce the motor thrust. If only the first ejector rod is used, the maximum angle cannot reach 40°. After introducing the second ejector rod, while the jacking mechanism has a large power arm, it also has enough length to make the leg board, i.e., the second bed board, reach 45°, which can better meet the user's need for leg lifting.

[0087] Further, the structure of the second ejector rod is V-shaped or U-shaped. The first ejector rod is hinged in the middle of the two side plates, and the middle part is used to abut against the jacked-up first ejector rod. In this embodiment, the second ejector rod adopts a structure of two vertical side plates plus a middle cross beam plate. The first ejector rod is clamped and hinged in the middle of the two side plates, and then the middle plate is mainly used to abut against the upper end of the jacked-up first ejector rod. In this way, after the bed board is jacked up, the second ejector rod can be prevented from possibly descending reversely due to its own center of gravity position. In this way, the first ejector rod can block its descending position to prevent the second ejector rod from being unable to lift the bed board.

[0088] In this embodiment, the second lifting mechanism 7 is mainly responsible for the lifting and lowering of the third bed board 6 and the second bed board 5. It also drives the second lifting mechanism 7 to lift and lower by the sliding between the moving frame and the fixed frame. Compared with the traditional structure, the number of parts is less, the installation is convenient, and the thickness of the bed body is greatly reduced. Its motion principle is also mainly divided into two stages. Jacking stage 1: The second push rod motor 733 pushes the second moving frame 72 to move in the direction away from the bed foot. The first ejector rod 731 hinged to the second moving frame 72 rotates clockwise, thereby pushing the leg board to rise until the lower side of the first ejector rod 731 collides with the lower fold of the second ejector rod 732. Rising stage 2: When the lower side of the first ejector rod 731 collides with the lower fold of the second ejector rod 732, the first ejector rod 731 and the second ejector rod 732 cannot rotate. At this time, the second ejector rod 732 rotates clockwise around the joint point with the leg board to continue pushing the leg board to rise until the maximum angle is reached.

[0089] Specifically, a second connecting plate 51 hinged to the bottom is arranged in the middle of the second bed board 5. The area of the second connecting plate 51 is smaller than that of the second bed board 5 and is embedded in the second bed board 5. The second connecting plate 51 is respectively hinged to one end of the second ejector rod 732. When the second bed board 5 is lifted, the second connecting plate 51 will be separated from the second bed board 5. In this embodiment, the relationship and function between the second connecting plate 51 and the second bed board 5 are the same as those between the first connecting plate 31 and the first bed board 3, and are used for the function of preventing pinching hands.

[0090] The second rectangular frame and its matching lifting mechanism in this embodiment are mainly used for lifting or lowering the leg board of the bed body. The structure is relatively simpler and more practical than the prior art, the manufacturing difficulty is reduced, and the corresponding production capacity can be further improved.

[0091] The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be consistent with the widest scope consistent with the principles and novel features disclosed herein.

[0092] Furthermore, while advantages associated with certain embodiments of the technology have been described in the context of those embodiments, other embodiments may also exhibit such advantages, and not all embodiments need necessarily exhibit such advantages to fall within the scope of the technology. Therefore, the present disclosure and associated technology may include other embodiments not expressly shown or described herein. Therefore, the present disclosure is limited only by the appended claims.

Claims

1. A lifting mechanism for a bed frame, characterized in that: A first rectangular bed frame, a first lifting mechanism disposed within the first rectangular bed frame; And a first bed board erected above the first rectangular bed frame; The first lifting mechanism includes a first fixed frame, a lifting bracket, and a first moving frame disposed inside the first fixed frame, and the first moving frame is slidable within the first fixed frame; One end of the lifting bracket is slidably connected to the first fixed frame, and the other end is a free end; The lifting bracket lowers or raises the first bed board by the reciprocating sliding of the first moving frame.

2. The lifting mechanism for a bed frame according to claim 1, characterized in that: The first fixed frame is in a U shape, including a fifth side frame, a sixth side frame, and a seventh side frame connected in sequence; The fifth side frame and the seventh side frame are arranged in parallel, and the first fixed frame and the fourth side frame enclose a rectangle; The first moving frame is in a U shape, including an eighth side frame, a ninth side frame, and a tenth side frame connected in sequence; First pulleys and fourth pulleys are respectively disposed on the outer sides of the mutually parallel eighth side frame and tenth side frame, and first slide rails matching the first pulleys and the fourth pulleys are provided on the inner sides of the fifth side frame and the seventh side frame; The lifting bracket includes symmetrically arranged left and right support rods, symmetrically arranged left and right first connecting rods and second connecting rods, and a first push rod motor; One end of the first push rod motor is fixedly connected to the fourth side frame, and the other end of the first push rod motor is fixedly connected to the ninth side frame, and the first push rod motor can push the first moving frame to move within the first fixed frame.

3. The lifting mechanism for a bed frame according to claim 2, characterized in that: A third pulley is provided at one end of the support rod, the third pulley is fixedly connected within the first slide rail, and the other end of the support rod is a free end facing the fourth side frame; One end of the first connecting rod is hinged to the first pulley, and the other end of the first connecting rod is hinged to the middle region of the support rod; A second pulley is provided 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 hinged to the second pulley, and the other end is hinged to the back of the first bed board; The second pulley extends towards the outer sides of the eighth side frame and the tenth side frame and extends to an L-shaped guide rail piece on the outer sides of the eighth side frame and the tenth side frame, and a second extension wheel is provided on the L-shaped guide rail piece.

4. The lifting mechanism for a bed frame according to claim 2, characterized in that: The support rod includes a first straight portion and a second straight portion, and the two straight portions are bent at an obtuse angle; a first support wheel is provided at the junction of the first straight portion and the second straight portion, and a second support wheel is provided at the end of the second straight portion, which is also the free end of the lifting bracket.

5. The lifting mechanism for a bed frame according to claim 4, characterized in that: One end of the support rod is provided with a third pulley, which is slidably connected within the first slide rail. The other end of the support rod is a free end, facing the fourth frame. One end of the first connecting rod is hinged to the first pulley, and the other end of the first connecting rod is hinged to the middle area of the support rod. A second pulley is provided 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 hinged to the second pulley, and the other end is hinged to the back of the first bed board. The second pulley extends towards the outside of the eighth frame and the tenth frame and extends to the L-shaped guide rail piece on the outside of the eighth frame and the tenth frame. The second extension pulley is on the L-shaped guide rail piece.

6. The lifting mechanism of a bed frame according to claim 1, characterized in that: A first connecting plate hinged to the bottom is provided in the middle of the first bed board. The area of the first connecting rod is smaller than that of the first connecting plate and is embedded in the first bed board. The first connecting plate is respectively hinged to one end of the second connecting rod. When the first bed board is lifted, the first connecting plate will be disengaged from the first bed board.

7. The lifting mechanism of a bed frame according to claim 1, characterized in that: It further includes a second rectangular bed frame and a second lifting mechanism arranged within the second rectangular bed frame; and a second bed board and a third bed board which are hinged to each other above the second rectangular bed frame; The second lifting mechanism includes a second fixed frame, a jacking support and a second moving frame arranged inside the second fixed frame. The second moving frame can slide within the second fixed frame; One end of the jacking support is slidably connected to the fixed frame, and the other end is hinged to the second bed board; The third bed board is connected to the second rectangular bed frame through a third connecting rod; The jacking support raises or lowers the second bed board and the third bed board by the reciprocating sliding of the second moving frame.

8. The lifting mechanism of a bed frame according to claim 5, characterized in that: The second fixed frame is in a U shape and includes a fifth surrounding edge, a sixth surrounding edge and a seventh surrounding edge which are connected in sequence; The fifth surrounding edge and the seventh surrounding edge are arranged in parallel and are respectively connected to the second surrounding edge and the sixth surrounding edge at both ends; The second moving frame is in a U shape and includes an eighth surrounding edge, a ninth surrounding edge and a tenth surrounding edge which are connected in sequence; Both ends on the outside of the eighth surrounding edge and the tenth surrounding edge are respectively provided with a fifth pulley and a sixth pulley. Second slide rails matching the fifth pulley and the sixth pulley are provided on the inner sides of the fifth frame and the seventh frame; The jacking support includes symmetric first jacking rods, second jacking rods and a second push rod motor on the left and right; One end of the first jacking rod is hinged to one end of the eighth surrounding edge, and the other end of the first jacking rod is hinged to one end of the second jacking rod. The other end of the second jacking rod is connected to the back of the second bed board. One side of the first jacking rod close to the second jacking rod has an upwardly bent folded edge, and the folded edge end is hinged to the second jacking rod. The length of the second jacking rod is smaller than that of the first jacking rod.

9. The lifting mechanism of a bed frame according to claim 8, characterized in that: The structure of the second ejector rod is V-shaped or U-shaped, and the first ejector rod is hinged in the middle of the two side plates, and the middle part is used to abut against the lifted first ejector rod.

10. The lifting mechanism of a bed frame according to claim 6, characterized in that: A second connecting plate hinged to its bottom is provided in the middle of the second bed board. The area of the second connecting plate is smaller than that of the second bed board and is embedded in the second bed board; the second connecting plate is respectively hinged to one end of the second ejector rod; when the second bed board is lifted, the second connecting plate will be separated from the second bed board.

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