Medical bed with bed-chair conversion function

Abstract

The application provides a medical bed with bed-chair conversion function, and relates to the technical field of medical beds.The medical bed comprises four strip-shaped pillow plates, four strip-shaped pillow plates are rotatably arranged on a buffer mounting frame, and four buffer pads with different densities and elasticities are arranged on the pillow surfaces of the four strip-shaped pillow plates.Two short sliding rods and two force receiving pins are symmetrically welded on one side of the strip-shaped pillow plate, which is located towards the central positioning shaft, and the two short sliding rods are in penetrating sliding fit with two rotating wheels.When the strip-shaped pillow plate is rotatably arranged at the middle position of the top end, the first ends of the two force receiving pins are in contact with two arc-shaped movable plates, and the elastic buffer of the buffer component can be utilized.A plug-in positioning piece for fixing a retaining ring is slidably arranged on one of the six-edge shafts through a spring.The four buffer pads with different densities and elasticities can be rotatably switched around the central positioning shaft through the two rotating wheels, four different softness and comfort levels can be adjusted, and the comfort requirements of different patients for the head can be met.

Description

Technical Field

[0001] This invention relates to the field of medical bed technology, and in particular to a medical bed with a bed-chair conversion function. Background Technology

[0002] Medical beds, also known as hospital beds or medical beds, are typically composed of a bed board, a mattress, and bed rails to prevent patients from falling. They are the most basic medical facilities in clinical practice and can be used for inpatient use in wards. They are also used for accompanying bedridden patients during examinations and transportation, and their applications are quite extensive. During examinations or nursing care, patients sometimes need to switch between sitting and lying positions, which requires some high-end hospital beds to have a bed-chair conversion function.

[0003] For example, utility model patent CN202322003480.4 discloses a wheelchair bed, including a base with rollers at each of the four corners. Symmetrical left hinge plates are arranged at the front and rear of the upper left side of the base, with the other ends of the two left hinge plates hinged to a wheelchair seat. A set of sliding grooves is provided on the upper right side of the base, with sliders slidably connected within the grooves. Right hinge plates are hinged above the sliders, with the other ends of the two right hinge plates hinged to the bottom of the wheelchair seat. Corresponding left and right hinge plates are hinged together. A support rod is provided between the two right hinge plates. A lifting assembly is provided above the base. Connectors are provided on the left and right sides of the wheelchair seat, with positioning components on the connectors. A leg support is provided on the right connector, and a wheelchair backrest is provided on the left connector. An adjustable support assembly is provided on the wheelchair backrest. This design allows for the conversion between a hospital bed and a wheelchair, facilitating user operation.

[0004] Existing medical beds, especially when switching to a chair position, are generally used with headrests. However, headrests are mostly single and fixed, with a fixed softness and comfort level that cannot be switched or adjusted as needed. This fails to meet the different comfort needs of different patients' heads. Although some beds are equipped with multiple headrests of varying softness and comfort levels that can be switched, each headrest requires a separate set of cushioning components to enhance comfort, resulting in a complex structure and high cost for the entire headrest assembly. Summary of the Invention

[0005] In view of this, the present invention provides a medical bed with bed-chair conversion function to solve the problem that each headrest needs to be equipped with a separate set of cushioning components to increase comfort, resulting in a complex structure and high cost for the entire headrest assembly.

[0006] The technical solution proposed in this invention is: a medical bed with bed-chair conversion function, specifically including a main bed frame and a movable auxiliary bed frame, wherein a movable auxiliary bed frame is rotatably connected to both the front and rear ends of the main bed frame, and a headrest assembly is installed on the front movable auxiliary bed frame;

[0007] The headrest assembly includes a cushioning mounting frame and a strip-shaped pillow plate. The cushioning mounting frame consists of a central positioning shaft and two retaining rings symmetrically welded and fitted onto the central positioning shaft. Two sliding rings are symmetrically slidably fitted onto the middle section of the central positioning shaft via spring pushes. The central positioning shaft is welded and fixed to the front movable sub-bed frame, and two hexagonal shafts are symmetrically welded to both ends. An arc-shaped notch is formed at the middle of the top of each of the two retaining rings, and an arc-shaped movable plate is slidably installed in each of the two arc-shaped notches. The two arc-shaped movable plates slide vertically and are symmetrically rotatably connected to the two slip rings by four transmission rods. The two arc-shaped movable plates, the four transmission rods, and the two slip rings together form a component for cushioning the strip-shaped pillow plate. Two rotating wheels are symmetrically rotatably installed at both ends of the central positioning shaft.

[0008] The strip-shaped pillow board is provided in four places. The four strip-shaped pillow boards are rotatably mounted on the buffer mounting frame. The pillow surface of the four strip-shaped pillow boards is covered with four buffer pads of different densities and elasticities. Two short sliding rods and two force-bearing rods are symmetrically welded on the side of the strip-shaped pillow board facing the central positioning axis. The two short sliding rods are in sliding engagement with two rotating wheels. When the strip-shaped pillow board is rotated to the middle position at the top, the first ends of the two force-bearing rods contact the two arc-shaped movable plates, which can be elastically buffered by the buffer components.

[0009] One of the hexagonal shafts is slidably mounted with a spring for fixing the retaining ring; the insert positioning component is composed of a collar and a ring of insert rods welded around the collar.

[0010] Furthermore, a rectangular groove is formed at the middle of the front end of the movable auxiliary bed frame, and the first ends of the two hexagonal shafts are welded and fixed to the side walls of the rectangular groove at the corresponding positions. The four strip-shaped pillow plates rotate and switch within the rectangular groove.

[0011] Furthermore, a hexagonal sliding shaft is welded to the middle of the bottom of the arc-shaped movable plate, and the hexagonal sliding shaft slides through and slides with the central positioning shaft.

[0012] Furthermore, the insert rod described in the first circle is inserted and connected to the central ring of the corresponding side wheel, and a pull shaft is welded on the collar to support the side away from the wheel.

[0013] Furthermore, two ground support frames are symmetrically welded at the front and rear ends of the main bed frame, and a rectangular frame is welded to the bottom of the main bed frame on the side of the insertion positioning piece. A U-shaped insertion piece is inserted through the rectangular frame by spring pushing.

[0014] Furthermore, a horizontally arranged drive frame is slidably installed at the bottom center of the main bed frame, and the drive frame has a rectangular structure.

[0015] A hexagonal positioning shaft is welded to the vertical support side plate of the ground contact support frame near the plug-in positioning component, and a horizontally arranged step bar is slidably installed on the hexagonal positioning shaft.

[0016] Furthermore, a pull rod is rotatably connected to the side rod near the U-shaped connector on the drive frame, and two sets of positioning holes are spaced apart front and back. The tail end of the pull rod is rotatably connected to the foot rod, and the protruding part of the head end of the U-shaped connector is inserted into the two sets of positioning holes.

[0017] Furthermore, a U-shaped swing component is welded to the bottom of the middle section of each of the two movable auxiliary bed frame pivots. The first ends of the two U-shaped swing components are rotatably connected to two connecting rods with opposite inclination directions. The first ends of the two connecting rods are rotatably connected to the front and rear ends of the drive frame.

[0018] Furthermore, the pivots of the two movable auxiliary bed frames are rotatably engaged with the top through portions of the two ground-contacting support frames.

[0019] The medical bed with bed-chair conversion function provided by this invention has the following beneficial effects:

[0020] When in use, the four cushioning pads with different densities and elasticities can be switched by rotating two wheels around the central positioning axis to adjust four different levels of softness and comfort, meeting the comfort needs of different patients.

[0021] In addition, when the four strip pillow panels are rotated and switched for use, they can transmit elastic buffering force through the two force-bearing rods on them and the two arc-shaped movable plates and buffer components. This allows the four strip pillow panels to share a single buffer component for buffering, which saves the trouble of configuring a buffer component for each strip pillow panel separately compared to the existing technology. This helps to simplify the structure of the entire headrest assembly and reduce manufacturing costs.

[0022] In addition, under normal conditions, the two curved movable plates slide upward to fill the two curved gaps, keeping the two retaining rings in a complete circular shape. When rotating to switch the four strip pillows, the two force-bearing rods are used to support and hold the strip pillows in their initial state and slide smoothly along the outer circumference of the two complete retaining rings, directly and smoothly abutting against the two curved movable plates to complete the adaptation connection with the cushioning components. This allows the four strip pillows to complete the adaptation connection with the cushioning components during the rotation and switching process, which helps to simplify the switching steps of the four strip pillows and makes them convenient and efficient to use.

[0023] In addition, through the power transmission of the drive frame, the two movable auxiliary bed frames can be driven to flip simultaneously, completing the switching between the horizontal bed and the seat mode in one go, eliminating the trouble of operating the two movable auxiliary bed frames step by step, making operation convenient and time-saving.

[0024] In addition, the foot lever, pull lever, and drive frame are connected to form a crank-slider mechanism. Through this crank-slider mechanism, sliding the foot lever downward can drive the drive frame to slide forward, providing the driving force for flipping and switching between the two movable sub-bed frames and the seat mode. The foot lever can be driven downward by foot, which can output a larger torque, making the seat switching operation smoother and less strenuous than manual operation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0026] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0027] In the attached diagram:

[0028] Figure 1 A schematic diagram of the overall structure of the present invention is shown;

[0029] Figure 2 A schematic diagram of the overall bottom side structure of the present invention is shown;

[0030] Figure 3 A schematic diagram of the overall bottom front end structure of the present invention is shown;

[0031] Figure 4 A schematic diagram of the bottom side structure of the recliner form of the present invention is shown;

[0032] Figure 5 A schematic diagram of the reclining chair form of the present invention is shown;

[0033] Figure 6 A schematic diagram of the drive frame structure of the present invention is shown;

[0034] Figure 7 This diagram illustrates the installation of the strip-shaped pillow plate and the buffer mounting bracket according to the present invention.

[0035] Figure 8 A schematic diagram of the disassembled state of the insertion positioning component of the present invention is shown;

[0036] Figure 9 A schematic diagram of the buffer mounting bracket of the present invention in disassembly state is shown;

[0037] Figure 10 A schematic diagram of the strip-shaped pillow plate structure of the present invention is shown;

[0038] List of reference numerals

[0039] 1. Main bed frame; 101. Ground support frame; 102. U-shaped connector; 103. Drive frame; 104. Pull rod; 105. Step rod; 106. Hexagonal positioning shaft;

[0040] 2. Movable secondary bed frame; 201. U-shaped swing component; 202. Connecting rod;

[0041] 3. Insert positioning component;

[0042] 4. Buffer mounting bracket; 401. Retaining ring; 402. Arc-shaped movable plate; 403. Transfer rod; 404. Slip ring; 405. Rotary wheel;

[0043] 5. Strip-shaped pillow board; 501. Buffer pad; 502. Short slide bar; 503. Force-bearing puncture bar. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the described embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] One embodiment of the present invention is provided, please refer to... Figures 1 to 10

[0046] A medical bed with a bed-chair conversion function includes a main bed frame 1 and a movable auxiliary bed frame 2. The front and rear ends of the main bed frame 1 are rotatably connected to a movable auxiliary bed frame 2. When converted into a seat form, the front movable auxiliary bed frame 2 is swung upward and the rear movable auxiliary bed frame 2 is swung downward. A headrest assembly is installed on the front movable auxiliary bed frame 2.

[0047] The headrest assembly includes a cushion mounting frame 4 and a strip-shaped pillow board 5. The cushion mounting frame 4 is composed of a central positioning shaft and two retaining rings 401 symmetrically welded and fitted onto the central positioning shaft. Two sliding rings 404 are symmetrically slidably fitted onto the middle section of the central positioning shaft by spring push. The central positioning shaft is welded and fixed to the front movable auxiliary bed frame 2, and two hexagonal shafts are symmetrically welded to both ends. An arc-shaped notch is opened at the middle position of the top of each of the two retaining rings 401. An arc-shaped movable plate 402 is slidably installed in each of the two arc-shaped notches. The two arc-shaped movable plates 402 slide vertically and are symmetrically rotatably connected to the two sliding rings 404 by four transmission rods 403. The two arc-shaped movable plates 402, the four transmission rods 403, and the two sliding rings 404 are connected together to form a cushioning component for cushioning the strip-shaped pillow board 5. The cushioning component can further improve the comfort of the patient's headrest.

[0048] Four strip-shaped pillow boards 5 are provided, and are rotatably mounted on the cushioning mounting frame 4. The pillow surfaces of the four strip-shaped pillow boards 5 are covered with four cushioning pads 501 of different densities and elasticities. The four cushioning pads 501 of different densities and elasticities can be switched by rotating around the central positioning axis via two rotating wheels 405 to adjust four different levels of softness and comfort to meet the comfort needs of different patients. Two short sliding rods 502 and two force-bearing rods 503 are symmetrically welded on the side of the strip-shaped pillow board 5 facing the central positioning axis. The two short sliding rods 502 slide through and cooperate with the two rotating wheels 405. When the strip-shaped pillow board 5 is rotated to the top center position for head use, the first ends of the two force-bearing rods 503 contact the two arc-shaped movable plates 402, which can be elastically buffered by the buffer component. When the four strip-shaped pillow boards 5 are rotated and switched for use, the elastic buffering force can be transmitted through the two force-bearing rods 503 on them, the two arc-shaped movable plates 402 and the buffer component. This allows the four strip-shaped pillow boards 5 to share a buffer component for buffering. Compared with the existing technology, it saves the trouble of configuring a buffer component for each strip-shaped pillow board 5 separately, which helps to simplify the structure of the entire headrest assembly and reduce manufacturing costs.

[0049] The buffering principle of the buffer component is as follows: two arc-shaped movable plates 402, four transmission rods 403, and two slip rings 404 are connected to form two crank-slider mechanisms. Through these two crank-slider mechanisms, the strip-shaped pillow plate 5 and the two force-bearing rods 503 push the two arc-shaped movable plates 402 downward, which drives the two slip rings 404 to slide closer to each other and compress the spring between them, thus providing elastic buffering for the strip-shaped pillow plate 5; two rotating wheels 405 are symmetrically rotated at both ends of the central positioning shaft.

[0050] Under normal conditions, the two curved movable plates 402 slide upward to fill the two curved gaps, keeping the two retaining rings 401 in a complete circular shape. When rotating and switching the four strip pillow plates 5, the two force-bearing rods 503 are used to support and hold the strip pillow plates 5 in the initial state and slide smoothly along the outer circumference of the two complete retaining rings 401 to directly and smoothly abut against the two curved movable plates 402, completing the adaptation connection with the buffer component. This allows the four strip pillow plates 5 to complete the adaptation connection with the buffer component during the rotation and switching process, which helps to simplify the switching steps of the four strip pillow plates 5, making it convenient and efficient to use.

[0051] One of the hexagonal shafts is slidably mounted with a spring to fix the retaining ring 401. The insert positioning component 3 is composed of a shaft collar and a ring of insert rods welded around the shaft collar. The insert positioning component 3 inserts and holds the four strip pillow plates 5 in the usage posture after rotation switching.

[0052] Specifically, a rectangular groove is formed at the middle of the front end of the movable auxiliary bed frame 2, and the first ends of two hexagonal shafts are welded and fixed to the side walls of the rectangular groove at the corresponding positions. The four strip-shaped pillow plates 5 rotate and switch within the rectangular groove.

[0053] Specifically, a hexagonal sliding shaft is welded to the middle of the bottom of the arc-shaped movable plate 402, and the hexagonal sliding shaft slides through and slides with the central positioning shaft.

[0054] Specifically, a ring of insert rods is inserted and connected to the central ring of the corresponding side rotating wheel 405. A pull shaft is welded on the ring, which supports the side away from the rotating wheel 405. The pull shaft can be used to easily insert and loosen the insertion and positioning part 3.

[0055] Specifically, two ground support frames 101 are symmetrically welded at the front and rear ends of the main bed frame 1. A rectangular frame is welded to the bottom of the main bed frame 1 on one side of the insertion positioning piece 3. A U-shaped insertion piece 102 is inserted through the rectangular frame by spring pushing.

[0056] Specifically, a horizontally arranged drive frame 103 is slidably installed at the bottom center of the main bed frame 1. The drive frame 103 has a rectangular structure.

[0057] A hexagonal positioning shaft 106 is welded to the vertical support side plate of the ground support frame 101 near the plug-in positioning component 3, and a horizontally arranged step bar 105 is slidably installed on the hexagonal positioning shaft 106.

[0058] Specifically, a pull rod 104 is rotatably connected to the side rod of the drive frame 103 near the U-shaped connector 102, and two sets of positioning holes are provided at a front-to-back interval. The tail end of the pull rod 104 is rotatably connected to the foot rod 105, and the protruding part of the head end of the U-shaped connector 102 is inserted into the two sets of positioning holes. The U-shaped connector 102 can be inserted to fix the drive frame 103, so that the two movable auxiliary bed frames 2 are kept in a horizontal or tilted state, and the horizontal bed and seat shape are fixed and maintained.

[0059] The foot lever 105, the pull rod 104, and the drive frame 103 are connected to form a crank-slider mechanism. Through this crank-slider mechanism, the downward sliding foot lever 105 can drive the drive frame 103 to slide forward, providing the driving force for the flipping and switching of the two movable auxiliary bed frames 2 and the seat mode. Moreover, the foot lever 105 can be driven downward by foot, which can output a larger torque, making the seat switching operation smoother and less strenuous than manual operation.

[0060] Specifically, a U-shaped swing element 201 is welded to the bottom of the middle section of each of the two movable auxiliary bed frames 2. The first ends of the two U-shaped swing elements 201 are rotatably connected to two connecting rods 202 with opposite inclination directions. The first ends of the two connecting rods 202 are rotatably connected to the front and rear ends of the drive frame 103. The two movable auxiliary bed frames 2, the two U-shaped swing elements 201, the drive frame 103, and the two connecting rods 202 are connected to form two crank-rocker mechanisms. Through these two crank-rocker mechanisms... The structure allows the forward sliding drive frame 103 to drive the two movable auxiliary bed frames 2 to tilt and flip up and down, transforming the horizontal bed into a seat. The backward sliding drive frame 103 can drive the two movable auxiliary bed frames 2 to rotate horizontally, transforming the seat into a horizontal bed. Through the power transmission of the drive frame 103, the two movable auxiliary bed frames 2 can be driven to flip simultaneously, completing the switching between the horizontal bed and seat modes in one go. This eliminates the hassle of operating the two movable auxiliary bed frames 2 step by step, making the operation convenient and time-saving.

[0061] Specifically, the pivots of the two movable auxiliary bed frames 2 are rotatably engaged with the top through portions of the two ground-contacting support frames 101.

[0062] Working principle: When converting to seat mode, the front movable sub-bed frame 2 is swung upward and the rear movable sub-bed frame 2 is swung downward. The specific switching principle is as follows: the two movable sub-bed frames 2, the two U-shaped swing parts 201, the drive frame 103 and the two connecting rods 202 are connected to form two crank rocker mechanisms. Through these two crank rocker mechanisms, the forward sliding drive frame 103 can drive the two movable sub-bed frames 2 to tilt and flip up and down, converting the horizontal bed into seat mode. The backward moving drive frame 103 can drive the two movable sub-bed frames 2 to rotate horizontally, converting the seat into a horizontal bed.

[0063] The foot lever 105, the pull rod 104, and the drive frame 103 are connected to form a crank-slider mechanism. Through this crank-slider mechanism, the foot lever 105 can slide downward to drive the drive frame 103 to slide forward, providing the driving force for the flipping and switching of the two movable sub-bed frames 2 and the seat mode. The foot lever 105 can be driven downward by foot. In addition, the U-shaped connector 102 can be inserted to fix the drive frame 103, so that the two movable sub-bed frames 2 are kept in a horizontal or flipped and tilted state, and the horizontal bed and seat modes are fixed and maintained.

[0064] Four cushioning pads 501 with different densities and elasticities can be switched and used by rotating around the central positioning axis via two rotating wheels 405, adjusting four different levels of softness and comfort to meet the comfort needs of different patients. The insertion positioning component 3 inserts and holds the four strip-shaped pillow boards 5 in the usage posture after rotation and switching, and the insertion positioning component 3 can be easily inserted, removed, tightened, or loosened via a pull shaft.

[0065] The cushioning component can further improve the comfort of the patient's headrest. The specific cushioning principle is as follows: two arc-shaped movable plates 402, four transmission rods 403 and two slip rings 404 are connected to form two crank-slider mechanisms. Through these two crank-slider mechanisms, the strip pillow plate 5 and the two force-bearing rods 503 push the two arc-shaped movable plates 402 downward, which can drive the two slip rings 404 to slide closer to each other and compress the spring between them, so as to provide elastic cushioning for the strip pillow plate 5.

[0066] Under normal conditions, the two curved movable plates 402 slide upward to fill the two curved gaps, so that the two retaining rings 401 maintain a complete circular shape. When rotating and switching the four strip pillow plates 5, the two force-bearing rods 503 are used to support and hold the strip pillow plates 5 in the initial state and slide smoothly along the outer circumference of the complete retaining rings 401 to directly and smoothly abut against the two curved movable plates 402, completing the adaptation connection with the buffer component.

[0067] The following points should be noted in this article:

[0068] 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0069] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0070] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A medical bed with bed-chair conversion function, comprising: The main bed frame (1) and the movable auxiliary bed frame (2) are rotatably connected to both the front and rear ends of the main bed frame (1), and a headrest assembly is installed on the front movable auxiliary bed frame (2). The headrest assembly is characterized by the following features: the headrest assembly includes a buffer mounting frame (4) and a strip-shaped pillow plate (5). The buffer mounting frame (4) is composed of a central positioning shaft and two retaining rings (401) symmetrically welded and fitted onto the central positioning shaft. Two slip rings (404) are symmetrically slidably fitted onto the middle section of the central positioning shaft by spring push. The central positioning shaft is welded and fixed together with the front movable auxiliary bed frame (2), and two hexagonal shafts are symmetrically welded to both ends. The top middle positions of the two retaining rings (401) are both open. An arc-shaped notch is provided, and an arc-shaped movable plate (402) is slidably installed in each of the two arc-shaped notches. The two arc-shaped movable plates (402) slide vertically up and down and are symmetrically rotatably connected to two slip rings (404) by four transmission rods (403). The two arc-shaped movable plates (402), the four transmission rods (403) and the two slip rings (404) are connected together to form a component for buffering the strip-shaped pillow plate (5). Two rotating wheels (405) are symmetrically rotatably installed at both ends of the central positioning shaft. The strip-shaped pillow board (5) is provided in four places. The four strip-shaped pillow boards (5) are mounted on the buffer mounting frame (4) around the pillow. The pillow surface of the four strip-shaped pillow boards (5) is covered with four buffer pads (501) with different densities and elasticities. Two short sliding rods (502) and two force-bearing rods (503) are symmetrically welded on the side of the strip-shaped pillow board (5) facing the central positioning axis. The two short sliding rods (502) are in sliding cooperation with the two rotating wheels (405). When the strip-shaped pillow board (5) is rotated to the middle position at the top, the head ends of the two force-bearing rods (503) contact the two arc-shaped movable plates (402) and can be elastically buffered by the buffer components. One of the hexagonal shafts is slidably mounted with a spring-driven insertion positioning component (3) for fixing the rotating wheel (405); the insertion positioning component (3) is composed of a collar and a ring of insertion rods welded around the collar.

2. A medical bed with bed-chair conversion function according to claim 1, characterized in that: The front middle position of the movable auxiliary bed frame (2) is provided with a rectangular groove, the first ends of the two hexagonal shafts are welded and fixed to the side wall of the rectangular groove at the corresponding position, and the four strip pillow plates (5) rotate and switch in the rectangular groove.

3. A medical bed with bed-chair conversion function according to claim 1, characterized in that: A hexagonal sliding shaft is welded to the middle of the bottom of the arc-shaped movable plate (402), and the hexagonal sliding shaft slides through and slides with the central positioning shaft.

4. A medical bed with bed-chair conversion function according to claim 1, characterized in that: The insert rod described in the first circle is inserted and connected to the central ring of its corresponding side wheel (405), and a pull shaft is welded on the collar to support the side away from the wheel (405).

5. A medical bed with bed-chair conversion function according to claim 1, characterized in that: Two ground support frames (101) are symmetrically welded at the front and rear ends of the main bed frame (1). A rectangular frame is welded to the bottom of the main bed frame (1) on the side of the insertion positioning piece (3). A U-shaped insertion piece (102) is inserted through the rectangular frame by spring pushing.

6. A medical bed with bed-chair conversion function according to claim 5, characterized in that: A horizontally arranged drive frame (103) is slidably installed at the bottom middle position of the main bed frame (1). The drive frame (103) has a rectangular structure. The ground support frame (101) has a hexagonal positioning shaft (106) welded to the vertical support side plate near the insertion positioning component (3), and a horizontally arranged step bar (105) is slidably installed on the hexagonal positioning shaft (106).

7. A medical bed with bed-chair conversion function according to claim 6, characterized in that: A pull rod (104) is rotatably connected to the side rod near the U-shaped connector (102) on the drive frame (103), and two sets of positioning holes are provided at a distance from front to back. The tail end of the pull rod (104) is rotatably connected to the foot rod (105), and the protruding part of the head end of the U-shaped connector (102) is inserted into the two sets of positioning holes.

8. A medical bed with bed-chair conversion function according to claim 6, characterized in that: A U-shaped swing component (201) is welded to the bottom of the middle section of the rotating shaft of the two movable auxiliary bed frames (2). The first ends of the two U-shaped swing components (201) are rotatably connected to two connecting rods (202) with opposite inclination directions. The first ends of the two connecting rods (202) are rotatably connected to the front and rear ends of the drive frame (103).

9. A medical bed with bed-chair conversion function according to claim 5, characterized in that: The pivots of the two movable auxiliary bed frames (2) are rotatably engaged with the top through portions of the two ground-contact support frames (101).

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