Tail bed and combined lifting electric bed

Abstract

The present invention provides a bed frame with a tail portion of the same length in the use state and a combined lifting electric bed. After being disassembled and packed, the packaging size is smaller; without affecting the operation of the motor, the adaptability of the bed legs is provided, and the size of the whole bed is further reduced. A bed frame includes a first transverse frame, a second transverse frame, a first longitudinal frame, and a second longitudinal frame; the second longitudinal frame is integrally formed by a middle portion, a first extension portion, and a second extension portion; the first transverse frame, the second transverse frame, the first longitudinal frame, and the second longitudinal frame form a polygon; the first longitudinal frame and the second longitudinal frame are distributed in sequence from the head of the bed to the tail of the bed; support devices are respectively provided on the outer sides of the surrounding frames of the first transverse frame and the second transverse frame; the support device is movably connected to the first transverse frame and the second transverse frame.

Description

Technical Field

[0001] The invention relates to an electric bed, in particular to a tail bed body and a combined lifting electric bed. Background Art

[0002] In the US market, UPS transportation is divided into two standards: 165" and 130". The freight difference is very large, about four hundred yuan, and the profit margin is considerable. The calculation method of UPS packaging size is packaging length + 2* packaging width + 2* packaging height. The size of the most commonly used Queen size (1524x2032) bed after packaging is far from meeting the requirements of UPS. At present, in order to meet the 130" packaging standard, the prior art patent number is 202021786184.6, and the patent name is "Electric lift bed and its application of combined lift bed", which divides the electric bed into three parts of the bed body, and connects the head bed body and the tail bed body through a middle connecting rod and a surrounding frame to realize the installation and disassembly of the whole bed.

[0003] like Figure 1 As shown, the bed board can only rotate normally under the push of the motor when the line connecting the hinge point of the motor and the bed board is above the line connecting the rotation point of the bed board and the motor. In order to ensure that the foot motor has a sufficient lever arm, the connection point between the motor and the frame needs to be moved downward, so that the motor must protrude from the bottom surface of the frame, which requires increasing the height of the bed legs; at the same time, in order to raise the bed frame to a certain angle, the stroke of the motor must meet the motor's manufacturability range, that is, the motor's installation size ≥ motor stroke + motor minimum size (non-retractable). Therefore, the overall frame size needs to be lengthened, making the size of the entire electric bed longer.

[0004] In summary, the shortcomings of the prior art are:

[0005] 1. In order to obtain sufficient lever arm, the existing drive motor needs to increase the height of the bed legs; under the same load and thrust conditions, the motor also requires more space in the height direction.

[0006] 2. When packing, the protruding part of the bed is difficult to pack, and it is necessary to fill it with fillers of corresponding height (increasing the packaging size) or remove the protrusions at the bottom of the bed, which increases the difficulty of installation.

[0007] 3. In order to meet the operating range of the motor, the installation size of the motor will make the size of the bed frame on which the motor is installed correspondingly longer, thereby lengthening the length of the entire electric bed after assembly. After the electric bed is disassembled and packaged, the packaging size is still not ideal. Summary of the invention

[0008] The purpose of the present invention is to solve the above problems and to provide a rear bed body and a combined lifting electric bed with the same length in the use state, which has a smaller packaging size after being disassembled and packed; without affecting the operation of the motor, the height of the bed legs is lowered to further reduce the packaging size of the entire bed.

[0009] To achieve the above purpose, the technical solution adopted by the present invention is:

[0010] A bed frame comprises a frame and a supporting device; supporting devices parallel to each other are respectively arranged on both sides of the surrounding frame formed by the frame; the supporting devices can be used to extend the length of the frame.

[0011] Furthermore, the frame includes a first transverse frame, a second transverse frame, a first longitudinal frame and a second longitudinal frame; the second longitudinal frame is integrally formed by a middle portion, a first extension portion and a second extension portion; the first transverse frame, the second transverse frame, the first longitudinal frame and the middle portion form a polygonal frame; the first longitudinal frame and the second longitudinal frame are distributed in sequence from the head to the foot of the bed; the supporting device is movably connected to the first transverse frame and the second transverse frame.

[0012] Furthermore, the support device can rotate 360° with the connection point as the axis; when the support device is placed toward the end of the bed and is on the same horizontal line as the horizontal frame, the support device can overlap the first extension part and the second extension part, and the length of the support device ac is greater than the length ab from the connection end to the second longitudinal frame.

[0013] Furthermore, the support device can rotate 360° with the connection point as the axis; a circular hole is provided on the cross section of the support device, and the first horizontal frame and the second horizontal frame are also correspondingly provided with a through hole of the same size. When the support device is placed toward the end of the bed and is on the same horizontal line as the horizontal frame, the center of the support device and the center of the horizontal frame are at the same point, and screws or pins can be inserted into the circular hole and the through hole to fix the position of the support device.

[0014] Furthermore, a slot member is sleeved on the outside of the support device, and the support device can slide back and forth in the slot member and can be used to extend the length of the frame.

[0015] Furthermore, the supporting device is detachably connected to the transverse frame.

[0016] Furthermore, the tail ends of the first transverse frame 11 and the second transverse frame 12 are configured to have a hollow structure inside, so that the support device can be inserted therein, and can be extended in and pulled out to achieve extension and contraction of the frame length.

[0017] Furthermore, the support device is composed of a rod part and a support part, one end of the rod part is hingedly connected to the transverse frame, and the other end is fixedly connected to the support part; the support part can be a rigid casting.

[0018] Furthermore, the support part can optionally use a roller device, which can not only provide better support when the electric bed is in use, but also when the frame is lifted and perpendicular to the ground, the rollers in the roller device touch the ground, and the sides are fixed by screws or pins, so that the bed frame can be pushed to move on the ground by manpower.

[0019] Furthermore, a tail bed body comprises any one of the above-mentioned bed frames, and a leg bracket arranged on the bed frame, wherein the leg bracket is movably connected to the bed frame; a leg driving mechanism for driving the leg bracket to rise and fall is connected inside the bed frame; the leg bracket is a hinged structure, and when it is not in a hinged state and is laid flat, the length of its overall structure is limited to the overall length of the bed frame; a bed board mechanism is connected to the leg bracket.

[0020] Furthermore, one end of the leg support is hingedly connected to the first longitudinal frame, and the other end can be freely raised and lowered.

[0021] Furthermore, the bed board mechanism is divided into a first bed board and a second bed board which are arranged side by side on the left and right; the first bed board and the second bed board are independent bed boards and are detachably connected to the leg bracket, and the size setting of the first bed board and the second bed board can be adapted to when the leg bracket is in a hinged or raised state.

[0022] Furthermore, one end of the second bed board toward the tail portion exceeds or is flush with a boundary position of the first supporting device and the second supporting device placed toward the tail portion of the bed.

[0023] Furthermore, a lifting device is provided under the tail of the second bed board, and when the leg bracket is lifted, the lifting device can lift the supporting device together with the leg bracket, so that the length ac of the supporting device does not exceed the tail limit position of the second bed board.

[0024] Furthermore, a combined lifting electric bed comprises any one of the above-mentioned tail bed body, head bed body and middle bed body; the head bed body, the middle bed body and the tail bed body are connected in sequence from the head to the foot of the bed; the head bed body comprises a head frame, a back support arranged on the head frame, and the back support is hingedly connected to the head frame; a back driving mechanism for driving the back support to rise and fall is connected in the head frame; a back board is connected to the back support; the middle bed body comprises a first connecting rod and a second connecting rod arranged in parallel along the length direction of the electric bed, and the upper parts of the first connecting rod and the second connecting rod are detachably connected to the middle bed board.

[0025] Furthermore, the front frame is composed of a third longitudinal frame, a fourth longitudinal frame, a third transverse frame, and a fourth transverse frame to form a polygon; a through-hole device is provided at the joint between the outer side of the frame of the third transverse frame and the fourth transverse frame and the middle bed body; a through-hole device is provided at the joint between the outer side of the frame of the first transverse frame and the second transverse frame of the rear frame and the middle bed body.

[0026] Furthermore, one end of the middle bed body is detachably connected to the front bed body through the first connecting rod and the second connecting rod; the other end of the middle bed body is detachably connected to the rear bed body through the first connecting rod and the second connecting rod.

[0027] Furthermore, the spacing distance between the first connecting rod and the second connecting rod is greater than or equal to the length of the first longitudinal frame and the fourth longitudinal frame; and pins are installed at both ends of the edge of the first connecting rod and both ends of the edge of the second connecting rod, and the pins are vertically installed and face the opposite side of the middle bed board; by buckling the pins into the through-hole device, the connection between the middle bed body, the head bed body, and the tail bed body is completed.

[0028] Furthermore, at least one first through hole is provided on the upper side of the fourth longitudinal frame and the first longitudinal frame; the middle bed board is provided with second through holes corresponding in number and position; an axle pin or a screw can be used to pass through the first through hole and the second through hole to reinforce the connection between the middle bed body, the head bed body and the tail bed body.

[0029] Further, the leg driving mechanism and the back driving mechanism each include: two sliding rods, a flip rod and a driving component;

[0030] The two sliding rods are respectively arranged at the two ends of the flip rod in an H-shape;

[0031] The middle part of the sliding rod protrudes toward the bed board in an obtuse V shape, the head of the sliding rod is provided with a rotatable first roller, the middle part of the sliding rod is provided with a rotatable second roller, and the tail of the sliding rod is hinged to the frame;

[0032] The flip rod is located between the middle of the sliding rod and the tail of the sliding rod;

[0033] The two ends of the driving component are respectively hingedly connected to the flip rod and the frame, and the horizontal direction of the thrust of the driving component is the same as the horizontal direction from the first roller to the second roller;

[0034] The horizontal direction from the first roller to the second roller points to the rotation axis of the turning device driving the bed board where the turning device is located;

[0035] The rotation axes of the first roller, the second roller, the sliding rod, the back board, the middle bed board and the bed board mechanism are parallel to each other.

[0036] Furthermore, a U-shaped ear is fixedly provided on the flip rod, and the driving component is hinged to the flip rod through the U-shaped ear.

[0037] Furthermore, a reinforcing plate is provided at the angle between the sliding rod and the flip rod in the back driving mechanism; the reinforcing plate is in an arc shape.

[0038] Furthermore, the bed frame and the bottom of the head frame are detachably connected to bed legs.

[0039] The beneficial effects of this program are:

[0040] 1. By adding support devices on both sides of the bed end frame, the overall length of the electric bed can be kept unchanged, and the size of the bed can be greatly reduced after it is disassembled.

[0041] 2. Through the non-interference structural design of the driving mechanism, when the motor is operating, it will not protrude to the bottom of the bed while meeting the height of the bed board, and will not have any restrictive effect on the selection of the height of the bed legs.

[0042] 3. By setting the relative distance between the two connecting rods in the middle bed body and setting pins on the connecting rods, the front bed body and the rear bed body are overlapped and placed on the middle bed body board in sequence. Through the fixed connection of the pins and the through-hole device and the limiting function of the connecting rods and the supporting device, the whole bed can be packed more conveniently, the volume requirement is smaller, and it is easier to transport.

[0043] 4. By adopting a supporting device, which adopts rollers, the bed frame can be easily moved on the ground with ordinary manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0045] Figure 1 A side view of an electric bed manufactured in the background technology of the present invention;

[0046] Figure 2 It is a three-dimensional diagram of a bed frame in Embodiment 1 of the present invention;

[0047] Figure 3 It is a side view of the tail bed in Example 1 of the present invention;

[0048] Figure 4 It is a three-dimensional diagram of the tail bed in Example 1 of the present invention;

[0049] Figure 5 It is a three-dimensional diagram of the entire bed body of the electric bed in Example 1 of the present invention;

[0050] Figure 6 It is an enlarged view of the detail of aa in Example 1 of the present invention;

[0051] Figure 7 is a three-dimensional diagram of the driving mechanism in Example 1 of the present invention;

[0052] Figure 8 It is a three-dimensional view of the back of the bed in Example 1 of the present invention;

[0053] Fig. 9 This is a three-dimensional diagram of the bed body disassembled and packaged in Example 1 of the present invention;

[0054] Fig.10 Schematic diagram of the supporting force of the roller device in Example 1 of the present invention;

[0055] Fig.11 A side view of the lifting device in Example 1 of the present invention Figure 1 ;

[0056] Fig.12 A side view of the lifting device in Example 1 of the present invention Figure 1 ;

[0057] Fig.13 The three-dimensional structure of the electric bed body in the second embodiment of the present invention Figure 1 ;

[0058] Fig.14 The three-dimensional structure of the electric bed body in the second embodiment of the present invention Figure 2 ;

[0059] Fig.15 The three-dimensional structure of the electric bed body in the second embodiment of the present invention Figure 3 ;

[0060] Fig.16 It is a three-dimensional diagram of a bed frame in a vertically erected state in Embodiment 1 of the present invention;

[0061] Description of reference numerals:

[0062] In the figure: 1. frame; 11. first transverse frame; 12. second transverse frame; 13. first longitudinal frame; 14. second longitudinal frame; 141. middle part; 142. first extension part; 143. second extension part; 2. support device; 21. rod; 22. support part; 23. roller device; 3. leg support; 4. leg driving mechanism; 5. bed board mechanism; 51. first bed board; 52. second bed board; 6. bed body; 7. middle bed body; 71. middle bed board; 72. first connecting rod; 73. second connecting rod; 74. pin; 8. first Bed body; 81. head frame; 811. third horizontal frame; 812. fourth horizontal frame; 813. third vertical frame; 814. fourth vertical frame; 82. back support; 83. back driving mechanism; 84. back plate; 91. sliding rod; 92. flip rod; 93. driving component; 94. first roller; 95. second roller; 96. reinforcement plate; 97. U-shaped ear; 10. through hole device; 211. lifting device; 212. positioning member; 131. first through hole; 132. second through hole; 151. U-shaped through hole device. DETAILED DESCRIPTION

[0063] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0064] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0065] Example 1

[0066] like Figure 2 As shown, a bed frame includes a frame 1 and a support device 2; the frame 1 is provided with support devices parallel to each other on both sides of the surrounding frame; the support device 2 can be used to extend the length of the frame 1. By adding the support devices 2 on both sides of the bed frame, the length of the entire bed frame can be extended when in use, and the support devices 2 can be folded up when not in use, which shortens the length of the entire bed frame, reduces the packing size, facilitates transportation, and reduces the corresponding cost.

[0067] Furthermore, the frame 1 includes a first transverse frame 11, a second transverse frame 12, a first longitudinal frame 13 and a second longitudinal frame 14; the second longitudinal frame 14 is formed by an intermediate portion 141, a first extension portion 142 and a second extension portion 143; the first transverse frame 11, the second transverse frame 12, the first longitudinal frame 13 and the intermediate portion 141 form a polygonal frame, and the frame 1 in this embodiment 1 adopts a traditional polygonal shape, preferably a rectangular shape; the first longitudinal frame 13 and the second longitudinal frame 14 are distributed in sequence from the head of the bed to the foot of the bed; Figure 2As shown, support devices 2 are respectively provided on the outer sides of the surrounding frames of the first transverse frame 11 and the second transverse frame 12; the support device 2 is movably connected to the first transverse frame 11 and the second transverse frame 12; generally, the connection point between the support device 2 and the transverse frame is set between the center line and the tail end of the transverse frame, so that the support device 2 can be placed toward the tail to extend the length of the entire bed frame 1, while reducing the length of the support device 2 itself.

[0068] In order to fully illustrate how the support device can extend the length of the entire bed frame and reduce the size of the disassembly and packaging, three different types of support devices are used to achieve this technical effect:

[0069] In the first mode, the support device 2 can rotate 360° with the connection point as the axis; when the support device 2 is placed toward the end of the bed and is at the same horizontal line as the horizontal frame, the support device 2 can overlap the first extension portion 142 and the second extension portion 143, and the length ac of the support device 2 is greater than the length ab from the connection end to the second longitudinal frame 14. The support device 2 extends backward from the entire bed frame 1, which can increase the length of the entire bed frame 1 when in use. At the same time, if the bed frame 1 is to be packed, the support device 2 is rotated toward the head of the bed, and the length ac of the support device 2 will not exceed the limit range of the entire bed frame 1 toward the head of the bed, shortening the length of the entire bed frame 1; when packing, a smaller package can be used to facilitate transportation and reduce corresponding costs. The support device 2 can also be detachably connected to the horizontal frame. When not in use, the support device 2 can be removed to further reduce the packing size, which is convenient and quick.

[0070] In the second mode, the support device 2 can rotate 360° with the connection point as the axis; a circular hole is provided on the cross section of the support device 2, and the first horizontal frame 11 and the second horizontal frame 12 are also provided with a through hole of the same size. When the support device 2 is placed toward the end of the bed and is on the same horizontal line as the horizontal frame, the center of the circle of the support device and the center of the circle of the horizontal frame are at the same point, and screws or pins can be inserted into the circular hole and the through hole to fix the position of the support device 2. The screws or pins used can be connected to the bed frame using a chain, and can be inserted when the support device is in use, and when resting, hung on the frame, and not easy to fall off.

[0071] In a third embodiment, a slot member is sleeved on the outer sides of the first transverse frame 11 and the second transverse frame 12, and the support device 2 can be inserted into the slot member and reciprocate to adjust the length of the frame; Fig.11 As shown, the tail ends of the first transverse frame 11 and the second transverse frame 12 are configured to have a hollow structure inside, so that the support device can be inserted therein, and can be extended in and pulled out to achieve extension and contraction of the frame length.

[0072] like Figure 3 As shown, further, the support device 2 includes: a rod 21 and a support 22, one end of the rod 21 is hingedly connected to the transverse frame, and the other end is fixedly connected to the support 22; the support 22 can be a rigid casting. The support device 2 is connected to the outside of the two transverse frames by a traditional hinged method, which can better enable the support device to achieve 360° rotation. The rod 21 and the support 22 are integrally formed L-shaped castings, and the use of rigid castings can effectively support the bed board used later.

[0073] Furthermore, the support portion 22 may optionally use a roller device 23. The use of roller support can not only greatly improve the supporting force of the bed frame 1 on the bed board, but also the roller reduces the force range between the board and the support device 2, prevents damage to the bed board, and increases the service life of the bed board.

[0074] like Fig.16 As shown, the support part 22 can be equipped with a roller device 23, which can not only play a better supporting role in the use of the electric bed, but also when the frame is lifted and perpendicular to the ground, the rollers in the roller device are in contact with the ground, and the side of the support part 22 is fixed by screws or pins, so that the bed frame can be pushed to move on the ground by manpower. In this way, the support rollers are in contact with the ground, and the bed frame can be moved by ordinary manpower, which is convenient and labor-saving.

[0075] like Figure 4 As shown, a tail bed body 6 comprises any of the above-mentioned bed frames 1, and a leg bracket 3 arranged on the bed frame 1, wherein the leg bracket 3 is movably connected to the bed frame 1; a leg driving mechanism 4 for driving the leg bracket 3 to rise and fall is connected inside the bed frame 1; the leg bracket 3 is a hinged structure, and when it is in a flat state, the length of its overall structure is limited to the overall length of the bed frame 1; and a bed board mechanism 5 is connected to the leg bracket 3. The tail bed body 6 with the support device 2 can not only extend the length of the entire tail bed body 6 when the electric bed is used, but also reduce the size of the tail bed body 6 when it is packaged when it is disassembled. In particular, when the support device 2 with a roller part is used, the support force of the frame 1 on the bed board mechanism 5 is increased by 4 times compared with the case without the support device 2, and the support performance is greatly improved.

[0076] The following is the support calculation demonstration of the support roller: Fig.10As shown, the bed board mechanism 5 near the foot is subjected to force, and the magnitude of the two load forces is compared; F1 is the maximum support point between the frame and the bed board at the contact point between the tail of the frame without a supporting device and the bed board; F2 is the maximum support point between the frame and the board at the contact point between the supporting pulley and the board. The distance from G to G1 is 246, and the distance from G1 to F1 is 206; the distance from G to G2 is 380, and the distance from G2 to F2 is 72.

[0077] The calculation formula is as follows:

[0078] Gx246=F1x206;

[0079] Gx380=F2x72;

[0080] F1=246 / 206G=1.19G

[0081] F2=380 / 76G=5G

[0082] F2=4.18F1.

[0083] Therefore, after adding the support wheels, the support performance is 4 times that of the device without support.

[0084] Furthermore, one end of the leg support 3 is hingedly connected to the first longitudinal frame 13, and the other end can be freely raised and lowered. When the leg support 3 is raised and lowered, the hinged connection can make the leg support 3 and the bed frame form a certain angle to meet the customer's requirements for the lifting angle.

[0085] Furthermore, the bed board mechanism 5 includes a first bed board 51 and a second bed board 52 arranged side by side on the left and right; the first bed board 51 and the second bed board 52 are independent bed boards, and there may be no connection between the two bed boards, so that they can be folded and packed after disassembly and assembly; and they are detachably connected to the leg bracket 3, and the size of the first bed board 51 and the second bed board 52 can be adapted to the leg bracket when it is in a hinged or lifting state. Due to the existence of the support device 2, the overall length of the second bed board 52 does not need to be the same as that of the prior art, and must be consistent with the length of the bed frame 1 or can only exceed it slightly. Because if the tail of the bed board in the prior art greatly exceeds the tail of the bed frame, due to the problem of supporting force, when the tail end of the second bed board is subjected to force, the other end of the second bed board will protrude, affecting the use effect; or when someone lies horizontally, the bed board above the frame part will also be subjected to pressure from the human foot, and the pressure that the bed board can withstand is much less than the supporting force when the supporting device 2 is installed. The formula for the specific supporting performance has been detailed above. Therefore, the end of the second bed board 52 toward the tail is further extended beyond or flush with the limit position of the support device 2 toward the tail of the bed. In this way, a shorter bed frame 1 can be used in combination with a longer bed board mechanism 5, which is a significant improvement over the conventional prior art. Moreover, the size of the tail bed body 6 after being disassembled and packed can be made smaller, saving costs.

[0086] Furthermore, if Fig.11 and Fig.12 As shown, a lifting device 11 is provided under the tail of the second bed board 52. When the leg bracket 3 is lifted, the lifting device 11 can lift the supporting device 2 together with the leg bracket 3, so that the length ac of the supporting device 2 at this time does not exceed the tail limit position of the second bed board 52, and the tail of the bed board will not be exposed to touch the human body; it is not only beautiful and practical, but also safe and reliable.

[0087] like Figure 5As shown, a combined lifting electric bed includes any of the above-mentioned tail bed bodies 6, where the tail bed body 6 can be understood as the tail of the entire electric bed body; the head bed body 8, the middle bed body 7 and the tail bed body 6 are connected in sequence from the head to the tail of the bed; the head bed body 8 includes a head frame 81, a back support 82 arranged on the head frame 81, and the back support 82 is hingedly connected to the head frame 81; the head frame 81 is connected with a back driving mechanism 83 for driving the back support 82 to rise and fall; the back support 82 is connected with a back board 84, and the size of the back board 84 is limited to the overall frame range of the back support 82; the middle bed body 7 includes a first connecting rod 72 and a second connecting rod 73 arranged in parallel along the length direction of the electric bed, and the upper parts of the first connecting rod 72 and the second connecting rod 73 are detachably connected to the middle bed board 71. The entire bed body is divided into three parts, and the bed frame is divided into the front, middle and rear three parts to achieve the minimum volume of each bed body. The front and rear parts can move independently, the front part can realize the lifting and lowering movement of the back; the rear part can realize the lifting and lowering movement of the legs. Take the 1500x2000 size bed frame as an example: the existing double folding mechanism size is 1500x1000x170 after folding; the product size of the mechanism of the present invention after folding is 1500x600x200, and the volume of the original double folding mechanism is 1.417 times that of the existing folding mechanism. The space utilization of the improved combined lifting electric bed is improved by 41.7% compared with the original product.

[0088] like Figure 8 As shown, further, the head frame 81 is composed of a third longitudinal frame 813, a fourth longitudinal frame 814, a third transverse frame 811, and a fourth transverse frame 812 to form a polygon; a through hole device 10 is provided at the joint between the outer side of the frame of the third transverse frame 811 and the fourth transverse frame 812 and the middle bed body 7; a through hole device 10 is provided at the joint between the outer side of the frame of the first transverse frame 11 and the second transverse frame 12 and the middle bed body 7.

[0089] Furthermore, one end of the middle bed body 7 is detachably connected to the head bed body 8 through the first connecting rod 72 and the second connecting rod 73; the other end of the middle bed body 7 is detachably connected to the tail bed body 6 through the first connecting rod 72 and the second connecting rod 73. The three parts of the bed body are connected mainly by setting protrusions at both ends of the first connecting rod 72 and the second connecting rod 73 of the middle bed board, and inserting them downward into the through-hole device 10 set on the head frame 81 and the tail frame 1; then the back bed board 84 is detachably connected to the back bracket 82, and the leg bracket 3 is detachably connected to the bed board mechanism 5 (the bed tail), so that the back board 84, the middle bed board 71 and the bed board mechanism form an integral bed board when the electric bed is not driven to rise or fall.

[0090] Then, the spacing distance between the first connecting rod 72 and the second connecting rod 73 is greater than or equal to the length of the first longitudinal frame 13 and the fourth longitudinal frame 814; Figure 6 As shown, pins 74 are installed at both ends of the edge of the first connecting rod 72 and both ends of the edge of the second connecting rod 73, and the pins 74 are vertically installed and face the opposite side of the middle bed board 71; by buckling the pins 74 into the through-hole device 10, the connection between the middle bed body 7, the head bed body 8 and the tail bed body 6 is completed.

[0091] The distance between the top surface of the through hole device 10 and the top surfaces of the first longitudinal frame 13 and the fourth longitudinal frame 814 is less than or equal to the length of the pin.

[0092] The middle bed body 7 is composed of a double connecting rod installed on the middle bed board 71; when connecting the whole bed, the front and rear frames are controlled by the pins 74 on the connecting rods to fix their positions; at the same time, the middle bed board 71 is connected and fixed with the front and rear frames by screws to control the upper and lower positions of the middle bed board 71 and the front and rear frames. Since the connecting rods are arranged in parallel on the middle bed board for overlapping with the front and rear bed frames; in actual use, the middle bed body 7 itself does not need to have additional bed feet or legs under it, so as to enhance the support of the bed board.

[0093] This connecting rod is also very useful when disassembling and packing the whole bed. Fig. 9 As shown, first place the middle bed board with the connecting rod facing upward on the ground, and then stack the head bed body 8 (without the back board 84) and the tail bed body 6 (without the bed board mechanism 5) in sequence on top of the middle bed board 71. Since a through hole device 10 is provided on the head bed body 8, and at this time the middle distance between the first connecting rod 72 and the second connecting rod 73 is exactly the length of the longitudinal frame, the through hole devices 10 on both sides of the head frame 81 can just be inserted into the pins 74 on the connecting rod, so that the left and right displacement of the head bed body 8 can be limited when packing, so that the head bed body 8 and the middle bed body 7 can be well fixedly connected. Furthermore, we place the tail bed 6 on the head bed 8 and the middle bed 7 which have been fixedly connected; by lowering the support devices 2 on both sides of the bed frame 1 (the tail), they are placed on both sides of the head bed 8 below, thereby limiting the relative position of the tail bed 6 and the head bed 8, thereby connecting the middle bed 7, the head bed 8, and the tail bed 6 as a whole without left-right displacement, etc., making the package smaller; and later, during the transportation of the package, the stability is higher, and there will be no left-right displacement, which will cause the whole product to scatter during transportation.

[0094] like Figure 5, as shown in Figure 6, further, at least one first through hole 131 is provided on the upper side of the fourth longitudinal frame 814 and the first longitudinal frame 13; the middle bed board is provided with a number of second through holes 132 corresponding to the position; an axle pin or a screw can be used to pass through the first through hole 131 and the second through hole 132 to reinforce the connection between the middle bed body 7, the head bed body 8, and the tail bed body 6. When installing the whole bed, the pin 74 of the middle bed board 71 is previously buckled on the through hole device 10 on the head and tail frames to fix it. On top of this, 2 to 3 first through holes can still be added to the first longitudinal frame 13 and the fourth longitudinal frame 814, and a corresponding number of second through holes are also provided on the connecting rod of the middle bed board, and screwed in with a screw or an axle pin to reinforce the connection between the head bed body 8, the middle bed body 7, and the tail bed body 6. Make the structure of the whole bed stronger and more stable when in use.

[0095] like Figure 7 As shown, further, the leg driving mechanism 4 and the back driving mechanism 83 each include: two sliding rods 91, a flip rod 92 and a driving component 93; the two sliding rods 91 are respectively arranged at the two ends of the flip rod 92 in an H-like shape; the middle part of the sliding rod 91 protrudes toward the bed board in an obtuse V-shape, the head of the sliding rod 91 is provided with a rotatable first roller 94, the middle part of the sliding rod 91 is provided with a rotatable second roller 95, and the tail of the sliding rod 91 is hinged to the frame; the flip rod 92 is located in the middle of the sliding rod 91 to the tail of the sliding rod 91; the two ends of the driving component 93 are respectively hingedly connected to the flip rod 92 and the frame, and the horizontal direction of the thrust of the driving component 93 is the same as the horizontal direction from the first roller 94 to the second roller 95; the horizontal direction from the first roller 94 to the second roller 95 points to the rotation axis of the flip device driving the bed board where they are located; the rotation axes of the first roller 94, the second roller 95, the sliding rod 91, the back board 84, the middle bed board and the bed board mechanism 5 are parallel to each other. The leg driving mechanism 4 and the back driving mechanism 83 can both adopt this structure. The sliding rod 91 is hinged to the base, and the sliding rod 91 adopts a curved structure, that is, the middle part is at an obtuse angle, and the obtuse angle is 120° to 170°. When the driving component 93 pushes the bed board to flip, the flip rod 92 drives the sliding rod 91 to rotate with the hinge point between the sliding rod 91 and the base as the axis, and the second roller 95 rolls on the corresponding bottom surface of the bed board, pushing the corresponding bed board to flip upward relative to the base. When the pushed bed board flips to 20° to 30° relative to the base, the first roller 94 contacts the bottom surface of the bed board and rolls on its bottom surface. When there is only one roller, there will be very large resistance when the support assembly flips 20° to 30°. Adding another roller can overcome the resistance and ensure that the bed board flips smoothly. The structure of the driving device reduces the thickness of the smart bed, making the smart bed thinner.

[0096] Furthermore, a U-shaped ear 97 is fixedly provided on the flip rod 92, and the driving component 93 is hinged to the flip rod 92 through the U-shaped ear 97. A reinforcing plate 96 is provided at the angle between the sliding rod 91 and the flip rod 92 in the back driving mechanism 83; the reinforcing plate 96 is in an arc shape. By using the arc reinforcing plate in combination with the U-shaped ear, the structure of the reinforcing driving mechanism can be made more stable and firm during use, and it is also convenient to produce and assemble.

[0097] The drive structure design in this embodiment is called a bed bottom non-interference drive mechanism, which has the following technical advantages over the prior art: (1) In the prior art, when the entire bed is installed, the bed has a limit on the height of the bed legs used, and the minimum height of the bed legs is ≥ the height of the motor protruding from the bed bottom surface; in the current non-interference drive mechanism, the entire mechanism does not protrude from the bed bottom surface, and the selection of bed legs is larger, and the entire bed body is more adaptable to the bed legs. (2) When disassembling and packaging, the protruding part of the bed body of the drive mechanism in the prior art is difficult to package, and it is necessary to fill it with fillers of corresponding height (increasing the packaging size) or remove the bottom protrusions, which increases the difficulty of installation. When packaging now, since there are no protrusions on the bottom surface of the bed, when packaging, it is only necessary to use a conventional packaging box to complete the packaging. (3) In the prior art, the working surface of the motor protrudes from the bottom of the bed, and the frame of the bed body has higher requirements on adaptability, and objects are not allowed to exist on the protruding bottom surface of the motor and on the motion trajectory. Now it can be matched with more bed frames, and the adaptability performance is higher.

[0098] Furthermore, the bed frame 1 and the bottom of the head frame 81 are detachably connected to the bed legs. Based on the use of the non-interference driving mechanism at the bottom of the bed, more models of bed legs can be selected for matching with the electric bed.

[0099] Example 2

[0100] like Fig.13 , 14 As shown in FIG. 15 , in this embodiment, the electric bed is assembled by fixing the middle bed body to the front bed body and detachably connecting the middle bed body to the rear bed body.

[0101] Specifically, the through-hole device of the third horizontal frame 811 and the fourth horizontal frame 812 in the head bed body 8 is U-shaped, and is hingedly connected to the first connecting rod 72 and the second connecting rod 73, so that the first connecting rod 72 and the second connecting rod 73 can rotate in the length direction of the electric bed with the connection point with the U-shaped through-hole device 151 as the center of the circle.

[0102] When it rotates toward the end of the bed and turns to a horizontal position, it can overlap the through-hole device 10 of the first horizontal frame 11 and the second horizontal frame 12, and can be fixed with screws or pins; then the middle bed board 71 is installed on the first connecting rod 72 and the second connecting rod 73; at least one circular hole is opened on the first connecting rod 72 and the second connecting rod 73, and a through hole of a size corresponding to the circular hole is provided at the corresponding position on the middle bed board 71, which is screwed in and reinforced with screws or pins.

[0103] When rotating toward the head of the bed, positioning pieces 212 are provided on both sides of the middle part of the third horizontal frame 811 and the fourth horizontal frame 712. The positioning pieces 212 are groove-shaped or L-shaped, with the opening facing upward. When the first connecting rod 72 and the second connecting rod 73 are rotated to be level with the third horizontal frame 811 and the fourth horizontal frame 812, they can be placed in the groove-shaped opening to fix the first connecting rod 72 and the second connecting rod 73.

[0104] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0105] It will be appreciated that the present invention is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A tail bed, characterized in that: The bed frame comprises a frame and a supporting device; the frame is provided with supporting devices parallel to each other on both sides; the supporting devices are used to extend the length of the frame; The frame includes a first transverse frame, a second transverse frame, a first longitudinal frame and a second longitudinal frame; the second longitudinal frame is formed integrally by a middle portion, a first extension portion and a second extension portion; the first transverse frame, the second transverse frame, the first longitudinal frame and the middle portion form a polygonal frame; The first longitudinal frame and the second longitudinal frame are distributed in sequence from the head to the foot of the bed; the supporting device is movably connected to the first transverse frame and the second transverse frame; The support device can rotate 360° with the connection point as the axis; when the support device is placed toward the end of the bed and is on the same horizontal line as the horizontal frame, the support device overlaps the first extension part and the second extension part, and the length ac of the support device is greater than the length ab from the connection end to the second vertical frame; The tail bed body also includes a leg bracket arranged on the bed frame, and the leg bracket is movably connected to the bed frame; a leg driving mechanism for driving the leg bracket to rise and fall is connected inside the bed frame; the leg bracket is a hinged structure, and when it is in a flat state, the length of its overall structure is limited to the overall length of the bed frame; a bed board mechanism is connected to the leg bracket; One end of the leg bracket is hingedly connected to the first longitudinal frame, and the other end can be freely raised and lowered; The bed board mechanism is divided into a first bed board and a second bed board which are arranged side by side on the left and right; the first bed board and the second bed board are independent bed boards and are detachably connected to the leg bracket, and the size setting of the first bed board and the second bed board is adapted when the leg bracket is in a hinged or lifting state; One end of the second bed board toward the tail portion exceeds or is flush with the boundary position of the first supporting device and the second supporting device placed toward the tail portion of the bed; A lifting device is arranged under the tail of the second bed board, and when the leg bracket is lifted, the lifting device lifts the supporting device together with the leg bracket, so that the length ac of the supporting device does not exceed the tail limit position of the second bed board.

2. A tail bed according to claim 1, characterized in that: The supporting device is detachably connected to the transverse frame.

3. A tail bed according to claim 2, characterized in that: The support device is composed of a rod and a support. One end of the rod is hingedly connected to the transverse frame, and the other end is fixedly connected to the support. The support is made of a rigid casting.

4. A tail bed according to claim 3, characterized in that: The support part uses a roller device, which plays a supporting role when the electric bed is in use; when the frame is lifted and perpendicular to the ground, the rollers in the roller device are in contact with the ground, and the side surfaces of the support part are fixed by screws or pins.

5. A combined lifting electric bed, characterized in that: It comprises the tail bed body, the head bed body and the middle bed body as described in any one of claims 1 to 4; the head bed body, the middle bed body and the tail bed body are connected in sequence from the head to the foot of the bed; the head bed body comprises a head frame, a back support arranged on the head frame, and the back support is hingedly connected to the head frame; a back driving mechanism for driving the back support to rise and fall is connected in the head frame; a back board is connected to the back support; the middle bed body comprises a first connecting rod and a second connecting rod arranged in parallel along the length direction of the electric bed, and the upper parts of the first connecting rod and the second connecting rod are detachably connected to the middle bed board.

6. The combined lifting electric bed according to claim 5, characterized in that: The front frame is composed of a third longitudinal frame, a fourth longitudinal frame, a third transverse frame, and a fourth transverse frame to form a polygon; a through-hole device is provided at the joint between the outer side of the frame of the third transverse frame and the fourth transverse frame and the middle bed body; a through-hole device is provided at the joint between the outer side of the frame of the first transverse frame and the second transverse frame of the rear frame and the middle bed body.

7. The combined lifting electric bed according to claim 6, characterized in that: One end of the middle bed body is detachably connected to the front bed body through the first connecting rod and the second connecting rod; the other end of the middle bed body is detachably connected to the rear bed body through the first connecting rod and the second connecting rod.

8. The combined lifting electric bed according to claim 7, characterized in that: The spacing distance between the first connecting rod and the second connecting rod is greater than or equal to the length of the first longitudinal frame and the fourth longitudinal frame; and pins are installed at both ends of the edge of the first connecting rod and both ends of the edge of the second connecting rod, and the pins are vertically installed and face the opposite side of the middle bed board; by buckling the pins into the through-hole device, the connection between the middle bed body, the head bed body, and the tail bed body is completed.

9. The combined lifting electric bed according to claim 8, characterized in that: At least one first through hole is provided on the upper side of the fourth longitudinal frame and the first longitudinal frame; the middle bed board is provided with second through holes corresponding in number and position; an axle pin or a screw is passed through the first through hole and the second through hole to reinforce the connection between the middle bed body, the head bed body and the tail bed body.

10. The combined lifting electric bed according to claim 9, characterized in that: The leg driving mechanism and the back driving mechanism both include: two sliding rods, a flip rod and a driving component; The two sliding rods are respectively arranged at the two ends of the flip rod in an H-shape; The middle part of the sliding rod protrudes toward the bed board in an obtuse V shape, the head of the sliding rod is provided with a rotatable first roller, the middle part of the sliding rod is provided with a rotatable second roller, and the tail of the sliding rod is hinged to the frame; The flip rod is located between the middle of the sliding rod and the tail of the sliding rod; The two ends of the driving component are respectively hingedly connected to the flip rod and the frame, and the horizontal direction of the thrust of the driving component is the same as the horizontal direction from the first roller to the second roller; The horizontal direction from the first roller to the second roller points to the rotation axis of the turning device driving the bed board where the turning device is located; The rotation axes of the first roller, the second roller, the sliding rod, the back board, the middle bed board and the bed board mechanism are parallel to each other.

11. The combined lifting electric bed according to claim 10, characterized in that: A U-shaped ear is fixedly provided on the flip rod, and the driving component is hinged to the flip rod through the U-shaped ear.

12. The combined lifting electric bed according to claim 11, characterized in that: A reinforcing plate is provided at the angle between the sliding rod and the flip rod in the back driving mechanism; the reinforcing plate is in an arc shape.

13. The combined lifting electric bed according to claim 6, characterized in that: The bed frame and the bottom of the head frame are detachably connected to the bed legs.

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