CN214285486U

CN214285486U - Detachable sickbed

Info

Publication number: CN214285486U
Application number: CN202023108100.6U
Authority: CN
Inventors: 柏秀芳; 王若星; 李永恒; 王江文
Original assignee: Qingdao Binhai University
Current assignee: Qingdao Binhai University
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-09-28
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to the technical field of nursing apparatus, in particular to a detachable sickbed, which comprises a bedstead mechanism, a detachable bed body mechanism and a dismounting locking mechanism, wherein the bedstead mechanism comprises a side frame rod, a head plate, a tail plate and a supporting frame; the two ends of the side frame rods are respectively fixedly connected with one end of the headboard and one end of the footboard, and the footboard and the headboard are positioned on the same side of the side frame rods; the lower ends of the headboard and the footboard are respectively fixed with a support frame; the detachable bed body mechanism is positioned at the inner sides of the side frame rod, the headboard and the footboard and is inserted into the insertion slot of the side frame rod; the utility model discloses inside is equipped with can dismantle and warp the removable bed body mechanism for the wheelchair, is convenient for improve medical personnel's nursing old patient or inconvenient patient's of action's convenience, pressure when lightening medical personnel or family members nursing.

Description

Detachable sickbed

Technical Field

The utility model relates to a nursing apparatus technical field, more specifically say, relate to a removable sick bed.

Background

The age-old age era of China comes, and by researching and researching sickrooms, most of sickbeds used in hospital sickrooms can only raise or lower the bed head through a hand rocker, so that sitting postures and other requirements of people during rest are met. It is known from the aspect of nursing staff that if an old patient or a patient with inconvenient actions needs to get out of bed for relaxation or do rehabilitation treatment, a plurality of nursing staff are often needed to move the patient to a wheelchair together, so that a great amount of manpower and inconvenient actions are needed, and the danger is undoubtedly increased in the moving process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a removable sick bed can effectively solve the problem among the prior art.

In order to achieve the above purpose, the present application provides a detachable hospital bed, which comprises a bedstead mechanism, a detachable bed body mechanism and a detachable locking mechanism, wherein the bedstead mechanism comprises side frame rods, a headboard, a footboard and a support frame; the two ends of the side frame rods are respectively fixedly connected with one end of the headboard and one end of the footboard, and the footboard and the headboard are positioned on the same side of the side frame rods; the lower ends of the headboard and the footboard are respectively fixed with a support frame; the detachable bed body mechanism is positioned at the inner sides of the side frame rod, the headboard and the footboard and is inserted into the insertion slot of the side frame rod; the dismounting locking mechanism is connected to the side frame rods in a matching mode and is inserted into the detachable bed body mechanism in a plugging mode so as to lock the detachable bed body mechanism and the side frame rods.

Optionally, the dismounting locking mechanism comprises a plugging slide block, a control slide plate, a vertical shaft, a reset pressure spring and a fixed baffle; the upper end of the inserting sliding block is in sliding fit with the sliding block groove of the side frame rod and is inserted into the detachable bed body mechanism; the lower end of the inserting sliding block is fixed on the control sliding plate; the control sliding plate is in sliding fit with the two vertical shafts, the upper ends of the two vertical shafts are fixed on the side frame rods, and the lower ends of the two vertical shafts are fixed on the fixed baffle; a reset pressure spring is sleeved on the vertical shaft and located between the control sliding plate and the fixed baffle.

Optionally, the detachable bed body mechanism comprises an insertion seat, a middle bed board, a back bed board, a leg bed board, an adjustable top board assembly, a vertical support plate and universal wheels; the inserting seat is fixed in the middle of the middle bed plate and inserted in the inserting slot of the side frame rod; the upper end of the inserting sliding block is inserted into the inserting groove of the inserting seat; one end of the middle bed board is connected with the back bed board in a matching way, and the other end of the middle bed board is connected with the leg bed board in a matching way; the adjustable top plate assembly is connected to the lower end of the middle bed plate and clamped below the leg bed plate; the lower extreme fixed connection two vertical extension boards of middle part bed board, two universal wheels are connected in the both ends of two vertical extension boards rotation respectively.

Optionally, the lower end of the middle bed plate is fixedly connected with a blocking supporting plate, and the blocking supporting plate is blocked at the lower end of the back bed plate.

Optionally, the adjustable top plate assembly comprises a top pressing sliding plate, a bracket and a first electric push rod; a guide slideway is formed between the bottom surface of the middle bed plate and the bracket, and the middle part of the jacking sliding plate is in sliding fit with the guide slideway; the outer end of the jacking sliding plate jacks and drives the bottom surface of the leg bed plate; the inner end of the jacking sliding plate is fixed at the movable end of the first electric push rod, and the fixed end of the first electric push rod is fixed on the bracket.

Optionally, the back bed board comprises a bed board body, a push-pull connecting rod, a horizontal sliding block and a second electric push rod; the bed board body is rotationally matched with one end of the middle bed board; one end of the push-pull connecting rod is rotatably matched on the bed board body, the other end of the push-pull connecting rod is rotatably matched on the horizontal sliding block, and the horizontal sliding block is slidably matched in a horizontal slideway on the side face of the middle bed board; the horizontal sliding block is fixed at the movable end of the second electric push rod, and the fixed end of the second electric push rod is fixed on the middle bed plate.

Optionally, two ends of the middle bed plate are connected with adjustable armrest frames in a matching manner; the adjustable armrest frame comprises an armrest rod, a lifting slide rod, a lifting supporting plate and a regulating screw rod; the handrail rods are fixed at the upper ends of the two lifting slide rods, the middle parts of the two lifting slide rods are in sliding fit with the middle bed plate, and the lower ends of the two lifting slide rods are fixed on the lifting supporting plate; the upper end of the regulating screw is rotatably matched on the bottom surface of the middle bed plate, the middle part of the regulating screw is in threaded fit on the lifting supporting plate, and the lower end of the regulating screw is provided with a screwing head.

The utility model has the advantages that: the utility model is internally provided with the detachable bed body mechanism which can be disassembled and deformed into the wheelchair, thereby being convenient for improving the convenience of medical care personnel for nursing the old patients or the patients with inconvenient actions, reducing the pressure of the medical care personnel or the family members during nursing, and being very convenient for disassembling and assembling deformation and having higher efficiency; when the detachable bed body mechanism is deformed to form the wheelchair for use, the inclination angle of the back bed plate used as a chair back can be adjusted according to actual needs, and the requirements of different sitting postures are met.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first overall schematic diagram provided in an embodiment of the present invention;

fig. 2 is a second overall schematic diagram provided in the embodiment of the present invention;

fig. 3 is a schematic view of a bed frame mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic view of a detachable bed mechanism according to an embodiment of the present invention;

fig. 5 is a schematic view of a back bed board provided by the embodiment of the present invention;

fig. 6 is a schematic view of an adjustable top plate assembly provided by an embodiment of the present invention;

fig. 7 is a schematic view of an adjustable armrest frame according to an embodiment of the present invention;

fig. 8 is a schematic view of a lock mechanism for mounting and dismounting according to an embodiment of the present invention.

Icon: a bed frame mechanism 1; a side frame bar 101; a headboard 102; a bed tail plate 103; a support frame 104; a detachable bed body mechanism 2; a socket 201; a middle bed plate 202; a back bed board 203; a bed board body 203A; a push-pull link 203B; a horizontal slider 203C; a second electric putter 203D; a leg bed plate 204; an adjustable top plate assembly 205; jacking the sliding plate 205A; a bracket 205B; a first electric push rod 205C; a vertical support 206; a universal wheel 207; a retainer plate 208; an adjustable armrest frame 209; a grab bar 209A; a lifting slide bar 209B; a lifting pallet 209C; a regulating screw 209D; disassembling and assembling the locking mechanism 3; an insertion slider 301; a control slide 302; a vertical shaft 303; a return compression spring 304; the baffle 305 is fixed.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for understanding and reading the contents disclosed in the specification, and are not used for limiting the conditions that the present application can implement, so the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the technical content disclosed in the present application without affecting the efficacy and the achievable purpose of the present application. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present application, and changes or modifications in the relative relationship may be made without substantial technical changes.

The present invention will be described in further detail with reference to the accompanying fig. 1-8.

The first embodiment is as follows:

as shown in fig. 1-8, a detachable hospital bed comprises a bedstead mechanism 1, a detachable bed body mechanism 2 and a detachable locking mechanism 3, wherein the bedstead mechanism 1 comprises side frame rods 101, a head plate 102, a tail plate 103 and a support frame 104; two ends of the side frame rod 101 are respectively and fixedly connected with one end of the headboard 102 and one end of the footboard 103, and the footboard 103 and the headboard 102 are positioned on the same side of the side frame rod 101; the lower ends of the headboard 102 and the footboard 103 are respectively fixed with a support frame 104; the detachable bed body mechanism 2 is positioned at the inner sides of the side frame rod 101, the headboard 102 and the footboard 103, and is inserted into the insertion slot of the side frame rod 101; the dismounting locking mechanism 3 is connected to the side frame rod 101 in a matching manner and is inserted into the detachable bed body mechanism 2, so that the detachable bed body mechanism 2 and the side frame rod 101 are locked. The utility model is internally provided with the detachable bed body mechanism 2 which can be detached and transformed into a wheelchair, thereby being convenient for improving the convenience of nursing the old patients or the patients with inconvenient actions by medical care personnel, reducing the pressure of the medical care personnel or the family members during nursing, and being very convenient for disassembling and assembling transformation and having higher efficiency; when the detachable bed body mechanism 2 needs to be detached, the detachable bed body mechanism 2 is controlled to be detached from the inserting and fixing of the detachable bed body mechanism 2, and the detachable bed body mechanism 2 is pulled out from the inserting and connecting slot of the side frame rod 101, so that the operation is very convenient.

Example two:

as shown in fig. 1 to 8, the dismounting locking mechanism 3 includes a plug-in slider 301, a control slide plate 302, a vertical shaft 303, a return compression spring 304 and a fixed baffle 305; the upper end of the inserting slide block 301 is in sliding fit with the slide block groove of the side frame rod 101 and is inserted into the detachable bed body mechanism 2; the lower end of the plugging slide block 301 is fixed on the control slide plate 302; the control sliding plate 302 is in sliding fit with the two vertical shafts 303, the upper ends of the two vertical shafts 303 are fixed on the side frame rods 101, and the lower ends of the two vertical shafts 303 are fixed on the fixed baffle 305; a return compression spring 304 is sleeved on the vertical shaft 303, and the return compression spring 304 is positioned between the control slide plate 302 and the fixed baffle 305. When the dismounting locking mechanism 3 is used, when the bedstead mechanism 1 is connected with the detachable bed body mechanism 2, the plugging slide block 301 is kept in a state of being plugged on the detachable bed body mechanism 2 under the elastic action of the reset pressure spring 304, and when the detachable bed body mechanism 2 needs to be dismounted from the bedstead mechanism 1, the plugging slide block 301 is driven to be separated from the detachable bed body mechanism 2 by pulling the control slide plate 302 downwards.

Example three:

as shown in fig. 1-8, the removable bed mechanism 2 comprises an insertion socket 201, a middle bed board 202, a back bed board 203, a leg bed board 204, an adjustable top plate assembly 205, a vertical support plate 206 and universal wheels 207; the inserting seat 201 is fixed in the middle of the middle bed board 202, and the inserting seat 201 is inserted into the inserting slot of the side frame rod 101; the upper end of the inserting slide block 301 is inserted into the inserting groove of the inserting seat 201; one end of the middle bed board 202 is connected with the back bed board 203 in a matching way, and the other end of the middle bed board 202 is connected with the leg bed board 204 in a matching way; the adjustable top plate assembly 205 is connected to the lower end of the middle bed plate 202, and the adjustable top plate assembly 205 is blocked below the leg bed plate 204; the lower end of the middle bed board 202 is fixedly connected with two vertical support plates 206, and two ends of the two vertical support plates 206 are respectively and rotatably connected with two universal wheels 207. The detachable bed body mechanism 2 can be deformed to form a wheelchair for use, when in use, the middle bed board 202 is used as a seat, the back bed board 203 is used as a chair back, and the leg bed board 204 is used as a leg supporting board; the inclination angle of the back bed board 203 used as a chair back can be adjusted according to actual needs, so that the requirements of different sitting postures are met; the position of the adjustable top plate assembly 205, which is pressed against the leg bed plate 204, can be controlled according to actual needs, so that the leg bed plate 204 can be turned downwards to form different included angles with the middle bed plate 202, and the adjustable top plate assembly is suitable for different sitting posture requirements; the universal wheels 207 are arranged so that the removable bed mechanism 2 can be moved when deformed into a wheelchair for use.

The lower end of the middle bed board 202 is fixedly connected with a blocking supporting plate 208, and the blocking supporting plate 208 is blocked at the lower end of the back bed board 203. The stability of the top surface of the middle bed plate 202 and the top surface of the bed plate body 203A in the same plane is improved.

The adjustable top plate assembly 205 comprises a top pressure sliding plate 205A, a bracket 205B and a first electric push rod 205C; a guide slideway is formed between the bottom surface of the middle bed plate 202 and the bracket 205B, and the middle part of the jacking sliding plate 205A is in sliding fit in the guide slideway; the outer end of the jacking sliding plate 205A jacks and drives the bottom surface of the leg bed plate 204; the inner end of the top pressure sliding plate 205A is fixed at the movable end of the first electric push rod 205C, and the fixed end of the first electric push rod 205C is fixed on the bracket 205B. When the adjustable top plate assembly 205 is used, the first electric push rod 205C is connected with the storage battery pack installed at the lower end of the middle bed plate 202, the first electric push rod 205C is driven and controlled by the control button on the middle bed plate 202 to drive the jacking sliding plate 205A to slide in the guide slideway formed between the bottom surface of the middle bed plate 202 and the bracket 205B, and the jacking sliding plate 205A can jack the leg bed plate 204 when sliding to change the included angle between the leg bed plate 204 and the middle bed plate 202.

The back bed board 203 comprises a bed board body 203A, a push-pull connecting rod 203B, a horizontal sliding block 203C and a second electric push rod 203D; the bed board body 203A is rotatably matched with one end of the middle bed board 202; one end of the push-pull connecting rod 203B is rotatably matched on the bed board body 203A, the other end of the push-pull connecting rod 203B is rotatably matched on the horizontal sliding block 203C, and the horizontal sliding block 203C is slidably matched in a horizontal slideway on the side surface of the middle bed board 202; the horizontal sliding block 203C is fixed at the movable end of the second electric push rod 203D, and the fixed end of the second electric push rod 203D is fixed on the middle bed board 202. When the back bed board 203 is used, the second electric push rod 203D is connected with the storage battery pack arranged at the lower end of the middle bed board 202, the second electric push rod 203D is driven and controlled by a control button on the middle bed board 202 to drive the horizontal sliding block 203C to horizontally slide in a horizontal sliding way on the side surface of the middle bed board 202, the horizontal sliding block 203C drives the bed board body 203A to overturn through the push-pull connecting rod 203B when sliding, an included angle between the bed board body 203A and the middle bed board 202 is adjusted, and the inclination angle of the bed board body 203A is changed to adapt to different sitting postures.

Example four:

as shown in fig. 1-8, two ends of the middle bed plate 202 are connected with adjustable armrest frames 209 in a matching manner; the adjustable armrest frame 209 comprises an armrest rod 209A, a lifting slide rod 209B, a lifting supporting plate 209C and a regulating screw 209D; the handrail rods 209A are fixed at the upper ends of the two lifting slide rods 209B, the middle parts of the two lifting slide rods 209B are in sliding fit with the middle bed plate 202, and the lower ends of the two lifting slide rods 209B are fixed on the lifting support plate 209C; the upper end of the regulating screw 209D is rotatably matched on the bottom surface of the middle bed plate 202, the middle part of the regulating screw 209D is in threaded fit on the lifting supporting plate 209C, and the lower end of the regulating screw 209D is provided with a screwing head. The horizontal height of the grab rail 209A in the adjustable grab rail frame 209 can be adjusted, so that the adjustable grab rail frame is convenient for users with different heights to use, the adjusting screw 209D is rotated during adjustment to change the contact position between the adjusting screw 209D and the lifting supporting plate 209C, and the lifting supporting plate 209C drives the grab rail 209A to be adjusted in a lifting way through the two lifting slide bars 209B, so that the horizontal height of the grab rail 209A is changed.

The principle is as follows: the utility model is internally provided with the detachable bed body mechanism 2 which can be detached and transformed into a wheelchair, thereby being convenient for improving the convenience of nursing the old patients or the patients with inconvenient actions by medical care personnel, reducing the pressure of the medical care personnel or the family members during nursing, and being very convenient for disassembling and assembling transformation and having higher efficiency; when the detachable bed body mechanism 2 needs to be detached, the detachable bed body mechanism 2 is controlled to be detached from the inserting and fixing of the detachable bed body mechanism 2, and the detachable bed body mechanism 2 is pulled out from the inserting and connecting slot of the side frame rod 101, so that the operation is very convenient.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides a removable sick bed, includes bedstead mechanism (1), removable bed body mechanism (2) and dismouting locking mechanical system (3), its characterized in that: the bedstead mechanism (1) comprises side frame rods (101), a headboard (102), a footboard (103) and a support frame (104); two ends of the side frame rod (101) are respectively and fixedly connected with one end of the headboard (102) and one end of the footboard (103), and the footboard (103) and the headboard (102) are positioned on the same side of the side frame rod (101); the lower ends of the headboard (102) and the footboard (103) are respectively fixed with a support frame (104); the detachable bed body mechanism (2) is positioned on the inner sides of the side frame rod (101), the headboard (102) and the footboard (103), and is inserted into the insertion slots of the side frame rod (101); the dismounting locking mechanism (3) is connected to the side frame rod (101) in a matched mode and is inserted into the detachable bed body mechanism (2) in an inserted mode, and therefore the detachable bed body mechanism (2) and the side frame rod (101) are locked.

2. The detachable hospital bed according to claim 1, wherein: the dismounting locking mechanism (3) comprises a plug-in sliding block (301), a control sliding plate (302), a vertical shaft (303), a reset pressure spring (304) and a fixed baffle (305); the upper end of the inserting sliding block (301) is in sliding fit with the sliding block groove of the side frame rod (101) and is inserted into the detachable bed body mechanism (2); the lower end of the plug-in sliding block (301) is fixed on the control sliding plate (302); the control sliding plate (302) is in sliding fit with the two vertical shafts (303), the upper ends of the two vertical shafts (303) are fixed on the side frame rod (101), and the lower ends of the two vertical shafts (303) are fixed on the fixed baffle (305); a reset pressure spring (304) is sleeved on the vertical shaft (303), and the reset pressure spring (304) is positioned between the control sliding plate (302) and the fixed baffle (305).

3. A detachable hospital bed according to claim 2, wherein: the detachable bed body mechanism (2) comprises an inserting seat (201), a middle bed board (202), a back bed board (203), a leg bed board (204), an adjustable top board assembly (205), a vertical support plate (206) and universal wheels (207); the inserting base (201) is fixed in the middle of the middle bed plate (202), and the inserting base (201) is inserted into the inserting slot of the side frame rod (101); the upper end of the inserting sliding block (301) is inserted into the inserting groove of the inserting seat (201); one end of the middle bed board (202) is connected with the back bed board (203) in a matching way, and the other end of the middle bed board (202) is connected with the leg bed board (204) in a matching way; the adjustable top plate assembly (205) is connected to the lower end of the middle bed plate (202), and the adjustable top plate assembly (205) is blocked below the leg bed plate (204); the lower end of the middle bed board (202) is fixedly connected with two vertical support plates (206), and two ends of the two vertical support plates (206) are respectively connected with two universal wheels (207) in a rotating mode.

4. A detachable hospital bed according to claim 3, wherein: the lower end of the middle bed board (202) is fixedly connected with a blocking supporting plate (208), and the blocking supporting plate (208) is blocked at the lower end of the back bed board (203).

5. A detachable hospital bed according to claim 3, wherein: the adjustable top plate assembly (205) comprises a top pressure sliding plate (205A), a bracket (205B) and a first electric push rod (205C); a guide slideway is formed between the bottom surface of the middle bed plate (202) and the bracket (205B), and the middle part of the jacking sliding plate (205A) is in sliding fit in the guide slideway; the outer end of the jacking sliding plate (205A) jacks and drives the bottom surface of the leg bed plate (204); the inner end of the jacking sliding plate (205A) is fixed at the movable end of the first electric push rod (205C), and the fixed end of the first electric push rod (205C) is fixed on the bracket (205B).

6. A detachable hospital bed according to claim 3, wherein: the back bed plate (203) comprises a bed plate body (203A), a push-pull connecting rod (203B), a horizontal sliding block (203C) and a second electric push rod (203D); the bed plate body (203A) is rotatably matched with one end of the middle bed plate (202); one end of the push-pull connecting rod (203B) is rotatably matched on the bed board body (203A), the other end of the push-pull connecting rod (203B) is rotatably matched on the horizontal sliding block (203C), and the horizontal sliding block (203C) is slidably matched in a horizontal slideway on the side surface of the middle bed board (202); the horizontal sliding block (203C) is fixed at the movable end of the second electric push rod (203D), and the fixed end of the second electric push rod (203D) is fixed on the middle bed plate (202).

7. A detachable hospital bed according to claim 3, wherein: two ends of the middle bed plate (202) are connected with adjustable armrest frames (209) in a matching way; the adjustable armrest frame (209) comprises an armrest rod (209A), a lifting slide rod (209B), a lifting supporting plate (209C) and a regulating screw rod (209D); the handrail rods (209A) are fixed at the upper ends of the two lifting slide rods (209B), the middle parts of the two lifting slide rods (209B) are in sliding fit with the middle bed plate (202), and the lower ends of the two lifting slide rods (209B) are fixed on the lifting supporting plate (209C); the upper end of the adjusting screw rod (209D) is rotatably matched on the bottom surface of the middle bed plate (202), the middle part of the adjusting screw rod (209D) is in threaded fit on the lifting supporting plate (209C), and the lower end of the adjusting screw rod (209D) is provided with a screwing head.