Height-adjustable bed

Abstract

The utility model provides a height-adjustable bed. The height-adjustable bed comprises two bed heads and a bed body, a group of lifting mechanisms is arranged in each bed head; the bed body is mounted between the two groups of lifting mechanisms; each bed head comprises two vertical pipes which are vertically arranged and a cross rod which is fixedly arranged at the upper ends of the two vertical pipes, a vertical rod is movably inserted into the bottom end of each vertical pipe of each bed head, a sleeve is movably arranged outside each vertical pipe of each bed head in a sleeving manner, a connecting seat is fixedly arranged at the bottom end of each vertical rod of each bed head, and the cross rod is fixedly arranged at the upper end of each vertical pipe of each bed head. A bottom rod is fixedly mounted between the two connecting seats of each bed head, and an electric push rod I is hinged between the bottom rod and the cross rod. According to the height-adjustable bed provided by the utility model, flexible adjustment of the height of the bed body and personalized adjustment of the angle of the bed plate are realized, so that more comfortable, convenient and personalized sleep experience is provided for a user, and the requirements of people on high-quality and personalized beds are met.

Description

Technical Field

[0001] The utility model relates to the technical field of beds, in particular to a height-adjustable bed. Background Art

[0002] In modern home life, beds, as a primary piece of furniture for rest and sleep, are increasingly valued for their design and functionality. Traditional beds often offer only basic sleeping functions, with significant limitations in height adjustment and comfort adjustments. With the advancement of technology and improvements in living standards, people's demand for beds is gradually shifting towards intelligent, personalized, and comfortable features.

[0003] First, when it comes to height adjustment, different groups have different requirements for bed height. For example, the elderly, those with limited mobility, and children require a bed at a moderate height for easy entry and exit. Healthy adults or fitness enthusiasts, on the other hand, may prefer an adjustable bed height to accommodate varying exercise or rest needs. However, traditional beds often lack this height adjustment feature, limiting their use cases and user experience.

[0004] Secondly, in terms of comfort, users also focus on the support and adaptability of the bed. Traditional bed frames are mostly fixed designs, unable to adjust according to factors such as the user's body shape and sleeping position. This may cause some users to experience back pain and other discomfort after prolonged use.

[0005] In summary, existing beds have many deficiencies in height adjustment and comfort adjustment. In order to meet people's demand for high-quality, personalized beds, it is necessary to develop a new type of height-adjustable bed that, through innovative design, can flexibly adjust the bed height and customize the bed angle, thereby providing users with a more comfortable, convenient, and personalized sleeping experience. Utility Model Content

[0006] The utility model aims to solve the problems raised in the background technology and provides a height-adjustable bed.

[0007] The specific technical solutions are as follows:

[0008] A height-adjustable bed comprising:

[0009] Two bed heads, each of which is provided with a lifting mechanism;

[0010] The bed is installed between the two sets of lifting mechanisms, wherein:

[0011] Each of the bed heads comprises two vertically arranged vertical tubes and a cross bar fixedly mounted on the upper ends of the two vertical tubes, a vertical rod is movably inserted into the bottom ends of the two vertical tubes of each bed head, and a sleeve is movably sleeved on the outside of the two vertical tubes of each bed head, a connecting seat is fixedly mounted on the bottom ends of the two vertical tubes of each bed head, a bottom rod is fixedly mounted between the two connecting seats of each bed head, an electric push rod is hinged between the bottom rod and the cross bar, a hanging seat is fixedly mounted on the side surface of the sleeve facing the bed body, and a hook is hung on the hanging seat;

[0012] The bed frame includes a square bed frame, and the square bed frame is horizontally and fixedly installed between the hooks;

[0013] The lifting mechanism can drive the sleeve to move up and down, thereby driving the square frame bed frame to move up and down.

[0014] As a preferred solution of the present invention, each group of the lifting mechanism includes two groups of lifting components symmetrically distributed in the head of the bed, and each group of the lifting components includes a vertical rod, a mounting seat 1, a matching seat 1, a fixed pulley 1, a matching seat 2, a fixed pulley 2, a pulley rope 1, a mounting seat 2 and a pulley rope 2. The vertical rod is vertically and fixedly mounted on the upper part of the bottom rod, the mounting seat 1 is fixedly mounted on the side of the vertical rod facing away from the electric push rod 1, the matching seat 1 is fixedly mounted on the inner side of the connection between the cross bar and the vertical pipe, the fixed pulley 1 is rotatably mounted on the matching seat 1, and the matching seat 2 is fixedly mounted on the bottom end of the vertical pipe. On one side of the electric push rod one, the fixed pulley two is rotatably mounted on the matching seat two, one end of the pulley rope one is fixedly connected to the upper end of the mounting seat one, and the other end of the pulley rope one passes through the upper part of the fixed pulley one and bends downward to extend, the mounting seat two is fixedly mounted on the end of the pulley rope one away from the mounting seat one, one end of the pulley rope two is fixedly mounted on the end of the mounting seat two away from the pulley rope one, and the other end of the pulley rope two passes through the bottom of the fixed pulley two and extends upward and is fixedly connected to the bottom end of the mounting seat one, and the side surface of the mounting seat two is fixedly connected to the side surface of the sleeve.

[0015] As a preferred solution of the present invention, when the sleeve is at the lowest position, the second mounting seat can abut against the second fitting seat.

[0016] As a preferred solution of the present invention, a connecting plate is fixedly connected between the two sleeves of each bed head.

[0017] As a preferred solution of the present invention, two symmetrically arranged self-locking universal wheels are fixedly mounted on the bottom of each bottom rod.

[0018] As a preferred solution of the present invention, both ends of each sleeve are fixedly sleeved with a sliding sleeve, and the inner annular surface of the sliding sleeve is in contact with the surface of the riser and is slidably connected thereto.

[0019] As a preferred solution of the present invention, protective cover plates are installed on both side surfaces of the cross bar by screws, and both ends of the protective cover plates are respectively in contact with the vertical pipes on both sides of the cross bar.

[0020] As a preferred solution of the present invention, a fixed frame and a bed board 1 are fixedly installed on the inner side of one end of the square bed frame, a rotating rod is rotatably installed on the inner side of the fixed frame, a hinged seat 1 is fixedly installed in the center of the rotating rod, an electric push rod 2 is hinged between the hinged seat 1 and the fixed frame, two connecting arms 1 are fixedly installed on the rotating rod on both sides of the hinged seat 1, and one end of the two connecting arms 1 away from the rotating rod is hinged to the bed board 1, and two symmetrically arranged connecting pieces are hinged between the bed board 1 and the fixed frame.

[0021] As a preferred solution of the present invention, a bed board 2 and a hinged seat 2 are hingedly connected to the inner side of the other end of the square bed frame, a bed board 3 is hingedly connected to the end of the bed board 2 away from the bed board 1, an electric push rod 3 is hinged between the bed board 2 and the hinged seat 2, and two symmetrically arranged connecting arms 2 are hinged between the bed board 3 and the square bed frame.

[0022] As a preferred solution of the present invention, a control switch is fixedly installed on one side of the square bed frame, and the control switch is electrically connected to the electric push rod 1, the electric push rod 2 and the electric push rod 3 respectively, and the control switch is provided with control buttons for respectively controlling the operation of the electric push rod 1, the electric push rod 2 and the electric push rod 3.

[0023] The utility model has the following beneficial effects:

[0024] The height-adjustable bed provided by the utility model realizes flexible adjustment of the bed body height and personalized adjustment of the bed board angle, thereby providing users with a more comfortable, convenient and personalized sleeping experience, and meeting people's demand for high-quality and personalized beds. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a height-adjustable bed provided in an embodiment of the present utility model;

[0026] Figure 2 A schematic diagram of the structure of the height-adjustable bed provided by an embodiment of the present invention with the protective cover removed;

[0027] Figure 3 for Figure 2Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 A schematic diagram of a partial structure of a height-adjustable bed provided in an embodiment of the present utility model;

[0029] Figure 5 A schematic diagram of the bed structure of a height-adjustable bed provided in an embodiment of the present utility model.

[0030] In the attached figure:

[0031] 1. Bottom bar; 101. Connecting seat; 102. Self-locking universal wheel;

[0032] 2. Pole erection;

[0033] 3. Vertical pipe; 301. Crossbar; 302. Protective cover;

[0034] 4. Casing; 401. Sliding sleeve; 402. Hanging seat; 403. Hook; 404. Connecting plate;

[0035] 5. Electric push rod 1;

[0036] 6. Vertical rod; 601. Mounting seat 1; 602. Mounting seat 1; 603. Fixed pulley 1; 604. Pulley rope 1; 605. Mounting seat 2; 606. Mounting seat 2; 607. Fixed pulley 2; 608. Pulley rope 2;

[0037] 7. Square bed frame;

[0038] 8. Fixed frame; 801. Rotating rod; 802. Connecting arm 1; 803. Bed board 1; 804. Articulated seat 1; 805. Electric push rod 2; 806. Connecting piece;

[0039] 9. Bed board 2; 901. Bed board 3; 902. Electric push rod 3; 903. Connecting arm 2; 904. Articulated seat 2;

[0040] 10. Control switch. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0043] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0045] Example

[0046] The height-adjustable bed provided in this embodiment is as follows: Figure 1-Figure 5 As shown, it includes: two bed heads and a bed body.

[0047] Among them, a set of lifting mechanisms is set in each bed head;

[0048] Among them, the bed is installed between two sets of lifting mechanisms;

[0049] Among them, each bed head includes two vertically arranged vertical tubes 3 and a cross bar 301 fixedly installed at the upper ends of the two vertical tubes 3, a vertical rod 2 is movably inserted inside the bottom ends of the two vertical tubes 3 of each bed head, and a sleeve 4 is movably sleeved on the outside of the two vertical tubes 3 of each bed head, a connecting seat 101 is fixedly installed at the bottom ends of the two vertical tubes 2 of each bed head, a bottom rod 1 is fixedly installed between the two connecting seats 101 of each bed head, an electric push rod 5 is hinged between the bottom rod 1 and the cross bar 301, a hanging seat 402 is fixedly installed on the side surface of the sleeve 4 facing the bed body, and a hook 403 is hung on the hanging seat 402;

[0050] The bed frame includes a square bed frame 7, which is horizontally and fixedly installed between the hooks 403;

[0051] The lifting mechanism can drive the sleeve 4 to move up and down, thereby driving the frame bed frame 7 to move up and down.

[0052] Among them, each lifting mechanism includes two sets of lifting components symmetrically distributed in the head of the bed, and each lifting component includes a vertical rod 6, a mounting seat 1 601, a matching seat 1 602, a fixed pulley 1 603, a matching seat 2 606, a fixed pulley 2 607, a pulley rope 1 604, a mounting seat 2 605 and a pulley rope 2 608. The vertical rod 6 is vertically and fixedly installed on the upper part of the bottom rod 1, the mounting seat 1 601 is fixedly installed on the side of the vertical rod 6 facing away from the electric push rod 1 5, the matching seat 1 602 is fixedly installed on the inner side of the connection between the cross bar 301 and the vertical pipe 3, the fixed pulley 1 603 is rotatably installed on the matching seat 1 602, and the matching seat 2 606 is fixedly installed at the bottom end of the vertical pipe 3 facing the electric push rod 1 On one side of the movable push rod 5, the fixed pulley 2 607 is rotatably mounted on the fitting seat 2 606, one end of the pulley rope 1 604 is fixedly connected to the upper end of the mounting seat 1 601, and the other end of the pulley rope 1 604 passes through the upper part of the fixed pulley 1 603 and bends downward to extend, the mounting seat 2 605 is fixedly mounted on the end of the pulley rope 1 604 away from the mounting seat 1 601, one end of the pulley rope 2 608 is fixedly mounted on the end of the mounting seat 2 605 away from the pulley rope 1 604, and the other end of the pulley rope 2 608 passes through the bottom of the fixed pulley 2 607 and extends upward and is fixedly connected to the bottom end of the mounting seat 1 601, and the side surface of the mounting seat 2 605 is fixedly connected to the side surface of the sleeve 4.

[0053] The height-adjustable bed using the above technical solution has a lifting mechanism for adjusting the height of the bed. That is, the height of the bed can be smoothly adjusted by using the electric push rod 5 in conjunction with four sets of lifting components. Each set of lifting components is composed of a vertical rod 6, a mounting base 601, a matching base 602, a fixed pulley 603, a matching base 606, a fixed pulley 607, a pulley rope 604, a mounting base 605, and a pulley rope 608. When in use, the piston rod of the electric push rod 5 is extended and retracted to drive the distance between the bottom bar 1 and the cross bar 301 to increase or decrease.

[0054] When the piston rod of the electric push rod 1 5 is extended, the distance between the bottom rod 1 and the cross rod 301 increases. At this time, the bottom rod 1 drives the vertical rod 6 to move downward, and the vertical rod 6 drives the mounting seat 1 601 to move downward. The mounting seat 1 601 pulls the pulley rope 1 604 to move. Under the reverse action of the fixed pulley 1 603, the pulley rope 1 604 pulls the mounting seat 2 605 to move upward. The mounting seat 2 605 drives the sleeve 4 to move upward along the vertical pipe 3. At this time, the sleeve 4 drives the hanging seat 402, the hook 403 and the square bed frame 7 to move upward, thereby achieving the purpose of adjusting the height of the bed body;

[0055] When the piston rod of the electric push rod 1 5 contracts, the distance between the bottom rod 1 and the cross rod 301 decreases. At this time, the bottom rod 1 drives the vertical rod 6 to move upward, and the vertical rod 6 drives the mounting seat 1 601 to move upward. The mounting seat 1 601 drives the pulley rope 1 604 to move. Under the reverse action of the fixed pulley 1 603, the pulley rope 1 604 drives the mounting seat 2 605 to move downward. The mounting seat 2 605 drives the sleeve 4 to move downward along the vertical pipe 3. At this time, the sleeve 4 drives the hanging seat 402, the hook 403 and the frame bed frame 7 to move downward, thereby achieving the purpose of adjusting the bed body to be lowered;

[0056] The above solution can smoothly adjust the height of the bed. More importantly, it allows a large range of bed lifting, which can better meet the needs of different groups of people.

[0057] Specifically, in this embodiment, when the sleeve 4 is at the lowest position, the second mounting seat 605 can abut against the second fitting seat 606, which can prevent the bed from being excessively lowered and dragging the floor, thereby avoiding affecting use.

[0058] Specifically, in this embodiment, in order to improve the stability of the height-adjustable bed, a connecting plate 404 is fixedly connected between the two sleeves 4 at each head of the bed.

[0059] Specifically, in this embodiment, in order to improve the mobility of the height-adjustable bed, two symmetrically arranged self-locking universal wheels 102 are fixedly mounted on the bottom of each bottom bar 1 .

[0060] Specifically, in this embodiment, in order to improve the stability of the sleeve 4 during movement, a sliding sleeve 401 is fixedly mounted on both ends of each sleeve 4, and the inner annular surface of the sliding sleeve 401 is in contact with and slidably connected to the surface of the riser 3.

[0061] Specifically, in this embodiment, in order to improve the aesthetics of the height-adjustable bed, protective cover plates 302 are installed on both side surfaces of the cross bar 301 by screws, and the two ends of the protective cover plates 302 are respectively in contact with the vertical pipes 3 on both sides of the cross bar 301. The provided protective cover plates 302 can hide the lifting mechanism, thereby improving the aesthetics of the height-adjustable bed.

[0062] Specifically, in this embodiment, in order to improve the support effect and comfort of the height-adjustable bed for the user's back, a fixed frame 8 and a bed board 803 are fixedly installed on the inner side of one end of the square bed frame 7, a rotating rod 801 is rotatably installed on the inner side of the fixed frame 8, a hinge seat 804 is fixedly installed in the center of the rotating rod 801, an electric push rod 805 is hinged between the hinge seat 804 and the fixed frame 8, and two connecting arms 801 are fixedly installed on both sides of the hinge seat 804 on the rotating rod 801. 2. The ends of the two connecting arms 802 away from the rotating rod 801 are hinged to the bed board 803, and two symmetrically arranged connecting pieces 806 are hinged between the bed board 803 and the fixed frame 8. The set electric push rod 805 can cooperate with the hinge seat 804 to push the rotating rod 801 to rotate. The rotating rod 801 can drive the two connecting arms 802 to drive the bed board 803 to adjust the tilt angle to meet the user's usage needs. At the same time, the two connecting pieces 806 can improve the stability of the bed board 803 during movement.

[0063] Specifically, in this embodiment, in order to improve the supporting effect and comfort of the height-adjustable bed for the user's legs, a bed board 2 9 and a hinged seat 2 904 are hinged on the inner side of the other end of the square bed frame 7, and a bed board 3 901 is hinged at the end of the bed board 2 9 away from the bed board 1 803. An electric push rod 3 902 is hinged between the bed board 2 9 and the hinged seat 2 904. At the same time, two symmetrically arranged connecting arms 2 903 are hinged between the bed board 3 901 and the square bed frame 7. The arranged electric push rod 3 902 is used to drive the bed board 2 9 to tilt. At the same time, under the action of the two connecting arms 2 903, the bed board 3 901 and the bed board 2 9 can be arched to support the user's legs. It conforms to the ergonomic design and has good comfort.

[0064] Specifically, in this embodiment, in order to facilitate the control of the operation of the height-adjustable bed, a control switch 10 is fixedly installed on one side of the square bed frame 7, and the control switch 10 is electrically connected to the electric push rod 1 5, the electric push rod 2 805 and the electric push rod 3 902 respectively. At the same time, control buttons for controlling the operation of the electric push rod 1 5, the electric push rod 2 805 and the electric push rod 3 902 respectively are provided on the control switch 10.

[0065] The height-adjustable bed provided in this embodiment achieves flexible adjustment of the bed height through a cleverly designed lifting mechanism and electric push rod system, while also enhancing the bed's stability and comfort. The following is a summary of its working principles and technical effects:

[0066] How it works

[0067] Lifting mechanism adjusts the bed height:

[0068] Each bedside is provided with a lifting mechanism, including two lifting components, which changes the distance between the bottom bar 1 and the cross bar 301 by the extension and contraction of the electric push rod 5.

[0069] When the electric push rod 5 extends, the bottom rod 1 drives the vertical rod 6 and the mounting seat 1 601 to move downward. Through the linkage of the pulley rope 1 604 and the pulley rope 2 608, the mounting seat 2 605 drives the sleeve 4 to rise along the vertical pipe 3, thereby lifting the bed.

[0070] When the electric push rod 1-5 retracts, the process is reversed and the bed descends.

[0071] Bed angle adjustment:

[0072] The bed board 1 803 is linked with the electric push rod 2 805 and the rotating rod 801 to achieve angle adjustment to meet the back support needs of different users.

[0073] The bed board 2 9 and the bed board 3 901 cooperate with the electric push rod 3 902 and the two connecting arms 2 903 to achieve the tilting of the bed board 2 9 and the arching of the bed board 3 901, thereby enhancing the leg support effect.

[0074] Overall stability:

[0075] The two sleeves 4 are connected by a connecting plate 404 to improve the stability of the bed head structure.

[0076] The sliding sleeve 401 ensures that the casing 4 slides smoothly on the riser 3 .

[0077] The self-locking universal wheels 102 facilitate movement while ensuring stability during use.

[0078] Beauty and protection:

[0079] The protective cover 302 hides the lifting mechanism, improving the overall aesthetics.

[0080] Technical Effects

[0081] Flexible height adjustment: Through the linkage of the electric push rod and the pulley rope, the bed height can be smoothly adjusted with a large lifting range to meet the needs of different people.

[0082] Strong stability: Multiple structural designs (such as connecting plates, sliding sleeves, universal wheels, etc.) ensure the stability of the bed during lifting and moving.

[0083] Good comfort: The adjustable bed board design (back and leg support) is ergonomic, improving the user's sleeping and rest experience.

[0084] Easy to operate: integrated control switch allows users to easily control the adjustment of bed height and bed angle.

[0085] High aesthetics: The hidden lifting mechanism and protective cover design make the bed look neat and beautiful.

[0086] To sum up, the height-adjustable bed provided in this embodiment performs excellently in terms of functionality, stability, comfort and aesthetics, and realizes flexible adjustment of the bed height and personalized adjustment of the bed board angle, thereby providing users with a more comfortable, convenient and personalized sleeping experience, and meeting people's demand for high-quality and personalized beds.

[0087] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A height-adjustable bed, characterized in that: include: Two bed heads, each of which is provided with a lifting mechanism; The bed is installed between the two sets of lifting mechanisms, wherein: Each of the bedside tables comprises two vertically arranged vertical tubes (3) and a cross bar (301) fixedly mounted on the upper ends of the two vertical tubes (3); a vertical rod (2) is movably inserted into the bottom ends of the two vertical tubes (3) of each bedside table, and a sleeve (4) is movably sleeved on the outside of the two vertical tubes (3) of each bedside table; a connecting seat (101) is fixedly mounted on the bottom ends of the two vertical tubes (2) of each bedside table, a bottom bar (1) is fixedly mounted between the two connecting seats (101) of each bedside table, an electric push rod (5) is hinged between the bottom bar (1) and the cross bar (301), a hanging seat (402) is fixedly mounted on the side surface of the sleeve (4) facing the bed body, and a hook (403) is hung on the hanging seat (402); The bed frame includes a square bed frame (7), and the square bed frame (7) is horizontally and fixedly installed between the hooks (403); The lifting mechanism can drive the sleeve (4) to move up and down, thereby driving the square frame bed frame (7) to move up and down.

2. The height-adjustable bed according to claim 1, wherein: Each group of the lifting mechanism includes two groups of lifting components symmetrically distributed in the head of the bed, and each group of the lifting components includes a vertical rod (6), a mounting seat (601), a matching seat (602), a fixed pulley (603), a matching seat (606), a fixed pulley (607), a pulley rope (604), a mounting seat (605) and a pulley rope (608). The vertical rod (6) is vertically and fixedly mounted on the upper part of the bottom rod (1), the mounting seat (601) is fixedly mounted on the side of the vertical rod (6) facing away from the electric push rod (5), the matching seat (602) is fixedly mounted on the inner side of the connection between the cross rod (301) and the vertical pipe (3), the fixed pulley (603) is rotatably mounted on the matching seat (602), and the matching seat (606) is fixedly mounted on the bottom end of the vertical pipe (3) toward the electric push rod (5). On one side of the movable push rod (5), the fixed pulley (607) is rotatably mounted on the fitting seat (606), one end of the pulley rope (604) is fixedly connected to the upper end of the mounting seat (601), and the other end of the pulley rope (604) passes through the upper part of the fixed pulley (603) and bends downward to extend, the mounting seat (605) is fixedly mounted on the end of the pulley rope (604) away from the mounting seat (601), one end of the pulley rope (608) is fixedly mounted on the end of the mounting seat (605) away from the pulley rope (604), and the other end of the pulley rope (608) passes through the bottom of the fixed pulley (607) and extends upward and is fixedly connected to the bottom end of the mounting seat (601), and the side of the mounting seat (605) is fixedly connected to the side of the sleeve (4).

3. The height-adjustable bed according to claim 2, wherein: When the sleeve (4) is at the lowest position, the second mounting seat (605) can abut against the second fitting seat (606).

4. The height-adjustable bed according to claim 2, wherein: A connecting plate (404) is fixedly connected between the two sleeves (4) at each bed head.

5. The height-adjustable bed according to claim 2, wherein: Two symmetrically arranged self-locking universal wheels (102) are fixedly mounted on the bottom of each bottom rod (1).

6. The height-adjustable bed according to claim 2, wherein: Both ends of each sleeve (4) are fixedly sleeved with a sliding sleeve (401), and the inner annular surface of the sliding sleeve (401) is in contact with the surface of the riser (3) and is slidably connected thereto.

7. The height-adjustable bed according to claim 2, wherein: Protective cover plates (302) are mounted on both sides of the crossbar (301) via screws, and both ends of the protective cover plates (302) are in contact with the vertical pipes (3) on both sides of the crossbar (301).

8. The height-adjustable bed according to claim 2, wherein: A fixed frame (8) and a bed board (803) are fixedly installed on the inner side of one end of the square bed frame (7), and a rotating rod (801) is rotatably installed on the inner side of the fixed frame (8), and a hinge seat (804) is fixedly installed in the center of the rotating rod (801), and an electric push rod (805) is hinged between the hinge seat (804) and the fixed frame (8), and two connecting arms (802) are fixedly installed on both sides of the hinge seat (804) on the rotating rod (801), and the ends of the two connecting arms (802) away from the rotating rod (801) are hinged to the bed board (803), and two symmetrically arranged connecting pieces (806) are hinged between the bed board (803) and the fixed frame (8).

9. The height-adjustable bed according to claim 8, wherein: The other end of the square bed frame (7) is hinged with a bed board 2 (9) and a fixed hinge seat 2 (904), and the end of the bed board 2 (9) away from the bed board 1 (803) is hinged with a bed board 3 (901), and an electric push rod 3 (902) is hinged between the bed board 2 (9) and the hinge seat 2 (904), and two symmetrically arranged connecting arms 2 (903) are hinged between the bed board 3 (901) and the square bed frame (7).

10. The height-adjustable bed according to claim 9, wherein: A control switch (10) is fixedly installed on one side of the square bed frame (7), and the control switch (10) is electrically connected to the electric push rod 1 (5), the electric push rod 2 (805) and the electric push rod 3 (902) respectively, and the control switch (10) is provided with control buttons for controlling the operation of the electric push rod 1 (5), the electric push rod 2 (805) and the electric push rod 3 (902) respectively.

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