CN111374860A - Healthy health preserving headrest equipment - Google Patents

Abstract

The invention belongs to the technical field of health care equipment, and particularly relates to health care headrest equipment which comprises a headrest shell and a support chassis, wherein a bearing groove position is formed in the front surface of the headrest shell, the bearing groove position comprises a headrest portion and a neck support portion, the back surface of the headrest shell is hinged with one end of a head lifting adjusting device, the other end of the head lifting adjusting device is fixed on the support chassis, the back surface of the headrest shell is hinged with one end of the neck lifting adjusting device, and the other end of the neck lifting adjusting device is fixed on the support chassis. The head and neck of the human body are respectively supported by the head support part and the neck support part of the supporting groove, so that the head and neck curves of the human body are effectively attached, the contact area of the head and neck of the human body is increased, and the stress of the head and neck of the human body is reduced; the inclination angle of the whole headrest shell is adjusted by means of the head lifting adjusting device and the neck lifting adjusting device, so that the bending adjustment of the neck and the spine of the human body is realized.

Description

Healthy health preserving headrest equipment

The technical field is as follows:

the invention belongs to the technical field of health preserving equipment, and particularly relates to health preserving headrest equipment.

Background art:

with the increasing quality of life, people pay more attention to their health, and more people are interested in body building and exercise. Wherein, current common body-building apparatus is including body-building chair, body-building pad etc. but body-building chair, body-building pad can only be simple play the effect of support and buffering to human health, at body-building exercise's in-process, lack the reasonable support to human head, especially to the support of human neck to can't let human head, neck, backbone keep a thread, can't make the human body take exercise under the state of relaxing, and then lead to body-building exercise's actual effect not good.

The invention content is as follows:

the invention aims to provide health-care headrest equipment which can reduce the stress on the neck, keep the head, the neck and the spine in the same line and improve the body-building and exercising effects.

The invention is realized by the following steps:

the utility model provides a healthy health preserving headrest equipment, including headrest housing and be located the dorsal support chassis of headrest housing, the bearing trench has been seted up on headrest housing's the front, the bearing trench includes the headrest portion with human head looks adaptation, and keep away from one side of headrest portion for the opening and with the neck support portion of human neck looks adaptation, the back of headrest housing relative with headrest position is articulated with head lift adjusting device's one end, head lift adjusting device's the other end is fixed on supporting the chassis, the back of headrest housing relative with neck support position is articulated with neck lift adjusting device's one end, neck lift adjusting device's the other end is fixed on supporting the chassis.

In foretell health preserving headrest equipment, the bearing trench still including set up on neck support portion and with the chin groove of human chin looks adaptation, the notch department lid in chin groove is equipped with the apron and can dismantle, the top surface of apron flushes with the tank bottom surface of neck support portion mutually, or the chin inslot has placed the filler and can dismantle, the top surface of filler flushes with the tank bottom surface of neck support portion mutually.

In the health preserving headrest equipment, the bottom surface of the bearing groove is covered with the first cushion pad, and the top surface of the cover plate or the filler is flush with the top surface of the first cushion pad.

In the health-care headrest equipment, the headrest shells positioned at the left side and the right side of the headrest part are provided with ear support grooves matched with ears of a human body.

In the health preserving headrest device, the head lifting adjusting device or/and the neck lifting adjusting device comprises a fixed seat fixed on the headrest shell, the fixed seat is hinged with a hinged seat through a rotating pin, and the hinged seat is connected with the support chassis through a telescopic assembly.

In the health preserving headrest equipment, the telescopic assembly comprises a connecting plate arranged on the fixed seat, the connecting plate is connected with the supporting chassis through a plurality of hinge groups, each hinge group is formed by two hinge rods which are arranged in a crossed mode and hinged through hinge shafts, the hinge rods of two adjacent hinge groups are hinged with each other, the hinge rods of the hinge groups at the head end and the tail end are respectively hinged with the connecting plate and the supporting chassis, the supporting chassis is in threaded connection with an adjusting screw rod, the inner end of the adjusting screw rod is connected with the hinge shaft of one hinge group, the outer end of the adjusting screw rod is in transmission connection with a power source, and the adjusting screw rod is driven by the power source to rotate inwards or outwards.

In the health preserving headrest equipment, a second cushion pad is arranged between the fixing seat and the connecting plate.

In foretell health preserving headrest equipment, be located the periphery cover of flexible subassembly is equipped with dust cover, and the both ends of dust cover are fixed respectively on fixing base and support chassis.

In foretell health preserving headrest equipment, still including with external fixed connection's mounting bracket, be provided with the horizontal slide rail that sets up along the fore-and-aft horizontal direction on the mounting bracket, sliding connection has a lifting support on the horizontal slide rail, the last vertical slide rail that is provided with of lifting support, support chassis sliding connection and follow vertical setting in vertical slide rail, be provided with the locking subassembly one that is used for fixed lifting support and horizontal slide rail relative position between lifting support and the horizontal slide rail, support and be provided with the locking subassembly two that is used for fixed support chassis and vertical slide rail relative position between chassis and the vertical slide rail.

In foretell health preserving headrest equipment, locking subassembly one and locking subassembly two are including the locking screw of threaded connection on lifting support or support chassis, and the head pot head of locking screw is equipped with the locking knob, and inside knob locking knob drives the terminal inward movement of locking screw and supports and lean on horizontal slide rail or vertical slide rail.

Compared with the prior art, the invention has the outstanding advantages that:

the head and neck of the human body are respectively supported by the head support part and the neck support part of the supporting groove position, and the supporting groove is designed according to the contact surface structure of the bottom of the human body when the human body lies on the back, so that the curve of the head and the neck of the human body can be effectively attached, the contact area of the head and the neck of the human body is increased, and the stress of the head and the neck of the human body is reduced; meanwhile, the inclination angle of the whole headrest shell is adjusted by means of the head lifting adjusting device and the neck lifting adjusting device, so that the bending adjustment of the neck and the spine of the human body is realized, the head, the neck and the spine of the human body can keep a straight line, and then a body builder adjusts breathing again, so that the breathing is natural, stable and smooth, and the relaxation of the body is achieved; then, the body-building person can do corresponding exercise to effectively improve the effect of body-building exercise.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the headrest housing of the present invention;

fig. 3 is a schematic view of the present invention fixed to a seat.

In the figure: 1. a headrest housing; 2. a support chassis; 3. supporting the groove position; 4. a head rest section; 5. a neck support portion; 6. a chin groove; 7. a cover plate; 8. a first buffer pad; 9. ear support grooves; 10. a fixed seat; 11. a hinge mount; 12. a connecting plate; 13. a hinge lever; 14. adjusting the screw rod; 15. a second buffer pad; 16. a dust shield; 17. a mounting frame; 18. a horizontal slide rail; 19. a lifting support; 20. locking screws; 21. a chair.

The specific implementation mode is as follows:

the invention will now be further described by way of specific examples, with reference to figures 1 to 3:

the utility model provides a healthy health preserving headrest equipment, including headrest housing 1 and be located the dorsal chassis 2 that supports of headrest housing 1, bearing trench 3 has been seted up on headrest housing 1's the front, bearing trench 3 includes the headrest portion 4 with human head looks adaptation, and keep away from one side of headrest portion 4 for the opening and with the neck support portion 5 of human neck looks adaptation, the back of headrest housing 1 relative with headrest portion 4 position is articulated with head lift adjusting device's one end, head lift adjusting device's the other end is fixed on supporting chassis 2, the back of headrest housing 1 relative with neck support portion 5 position is articulated with neck lift adjusting device's one end, neck lift adjusting device's the other end is fixed on supporting chassis 2. The whole body of the invention is smooth, and hands, heads or necks of body builders can be effectively prevented from being scratched.

The head and neck of a human body are respectively supported by the head support part 4 and the neck support part 5 of the supporting groove position 3, and the supporting groove is designed according to the structure of a contact surface at the bottom of the human body when the human body lies on the back, so that the curve of the head and the neck of the human body can be effectively attached, the contact area of the head and the neck of the human body is increased, and the stress of the head and the neck of the human body is reduced; meanwhile, the inclination angle of the whole headrest shell 1 is adjusted by means of the head lifting adjusting device and the neck lifting adjusting device, so that the bending adjustment of the neck and the spine of the human body is realized, the head, the neck and the spine of the human body can keep a straight line, and then a body builder adjusts breathing again, so that the breathing is natural, stable and smooth, and the relaxation of the body is achieved; then, the body-building person can do corresponding exercise to effectively improve the effect of body-building exercise.

Furthermore, in order to enable the body builder to lie on the stomach comfortably in the supporting slot position 3 of the headrest housing 1, the supporting slot position 3 further comprises a chin slot 6 which is arranged on the neck rest part 5 and is matched with the chin of the human body; meanwhile, when the body-building person lies on the back in the bearing slot position 3 of the headrest housing 1, in order to avoid discomfort caused by the vacancy of the chin groove 6, the notch of the chin groove 6 is covered with the cover plate 7 and can be detached, and the top surface of the cover plate 7 is flush with the bottom surface of the neck support part 5. Of course, the chin groove 6 can be detachable by placing a filler, the top surface of which is flush with the bottom surface of the neck brace 5.

In order to optimize the comfort of the fitness exerciser, the bottom surface of the supporting groove 3 is covered with a first cushion pad 8, and the top surface of the cover plate 7 or the filler is flush with the top surface of the first cushion pad 8. The first buffer cushion 8 is directly contacted with the head and the neck of a human body to bear force and is uniformly distributed, so that the human body can feel soft and comfortable when contacting; and, be detachable construction between blotter 8 and the bearing trench 3, the later stage of being convenient for is washd, is disinfected.

Simultaneously, in order to further improve the compatibility between bearing trench 3 and the human head, improve body-builder's use and experience the sense, in order to be located headrest housing 1 of the left and right both sides of headrest portion 4 is seted up with the ear support groove 9 of human ear looks adaptation.

Further, in the present invention, each of the head lifting adjusting device and the neck lifting adjusting device comprises a fixed seat 10 fixed on the headrest housing 1, the fixed seat 10 is hinged to a hinge seat through a rotation pin, and the hinge seat 11 is connected to the support chassis 2 through a telescopic assembly.

In addition, in this embodiment, the specific implementation manner adopted by the telescopic assembly is as follows: the telescopic assembly comprises a connecting plate 12 arranged on a fixed seat 10, the connecting plate 12 is connected with a support chassis 2 through a plurality of hinge groups, each hinge group is formed by two hinge rods 13 which are arranged in a crossed mode and hinged through hinge shafts, the hinge rods 13 of two adjacent hinge groups are hinged with each other, the hinge rods 13 of the hinge groups at the head end and the tail end are respectively hinged with the connecting plate 12 and the support chassis 2, an adjusting screw 14 is connected to the support chassis 2 in a threaded mode, the inner end of the adjusting screw 14 is connected with the hinge shaft of one hinge group, the outer end of the adjusting screw 14 is in transmission connection with a power source, and the adjusting screw 14 is driven by the power source to rotate inwards or outwards.

The power source is a driving motor or manual driving, that is, the adjusting screw 14 can be directly driven by the driving motor to rotate, or an adjusting knob is sleeved on the outer end of the adjusting screw 14, and the purpose of rotating the adjusting screw 14 is achieved by manually twisting the adjusting knob.

Of course, the telescopic assembly may also adopt a telescopic screw and a nut which are matched with each other in the prior art, that is, the telescopic screw is rotatably connected to the support base, the nut is connected to the driving screw through a thread, and the nut is fixedly connected to the fixing seat 10.

In addition, the head lifting adjusting device and the neck lifting adjusting device can also be formed by fixing one end of a telescopic assembly on the headrest shell 1 and hinging the other end of the telescopic assembly with the support chassis 2.

Furthermore, in order to reduce the vibration of the present invention and improve the overall stability, a second cushion pad 15 is disposed between the fixing base 10 and the connecting plate 12.

And, in order to avoid external dust to get into in the flexible subassembly and influence the normal operating condition of flexible subassembly, be located the periphery cover of flexible subassembly is equipped with dust shield 16, and the both ends of dust shield 16 are fixed respectively on fixing base 10 and support chassis 2.

The invention has a plurality of using modes, wherein the first commonly used using mode is that the supporting bottom plate is flatly placed on a horizontal plane, and a body builder can sit on the back or lie on the stomach to do exercise in the supporting groove position 3 of the headrest shell 1.

In addition, the second usage mode is that the invention is fixed with the outside by means of a fixing mechanism and is vertically placed, that is, the fixing mechanism comprises an installation frame 17 fixedly connected with the outside, a horizontal slide rail 18 arranged along the front-back horizontal direction is arranged on the installation frame 17, a lifting support 19 is connected on the horizontal slide rail 18 in a sliding manner, a vertical slide rail is arranged on the lifting support 19 along the vertical direction, the supporting chassis 2 is connected in the vertical slide rail in a sliding manner and is vertically arranged, a locking assembly I used for fixing the relative position of the lifting support 19 and the horizontal slide rail 18 is arranged between the lifting support 19 and the horizontal slide rail 18, and a locking assembly II used for fixing the relative position of the supporting chassis 2 and the vertical slide rail is arranged between the supporting chassis 2 and. The mounting frame 17 can be fixedly connected with a seat 21, and the front-back displacement adjustment of the headrest housing 1 is realized by moving the lifting support 19 back and forth along the horizontal slide rail 18; the up-and-down position adjustment of the headrest housing 1 is realized by moving the support chassis 2 up and down along the vertical slide rail. Thus, the exerciser can sit on the seat 21 and place the head in the holding groove 3 of the headrest housing 1 to perform exercise.

Furthermore, the first locking assembly and the second locking assembly both comprise locking screws 20 which are in threaded connection with the lifting support 19 or the supporting chassis 2, the head ends of the locking screws 20 are sleeved with locking knobs, and the locking knobs of the inward knobs drive the tail ends of the locking screws 20 to move inward and abut against the horizontal sliding rails 18 or the vertical sliding rails.

Of course, the locking assembly i and the locking assembly ii may also adopt a matching structure of positioning holes and bolts, that is, the positioning holes are arranged at equal intervals along the horizontal slide rail 18 or the vertical slide rail, and the bolts penetrate through the lifting bracket 19 or the supporting chassis 2 and are inserted into one of the positioning holes, so as to realize the relative fixation of the positions between the lifting bracket 19 and the horizontal slide rail 18 and between the supporting chassis 2 and the vertical slide rail.

Fitness requirements and methods of using the apparatus of the present invention:

(1) keeping warm of the whole body, including keeping warm of the head and the palm;

(2) drinking a proper amount of warm boiled water;

(3) the music with slow rhythm is listened to, and the music with stable and rhythmic breathing can be listened to;

(4) selecting indoor or outdoor with quiet environment and fresh air, and if the user exercises on the bed, the user needs to increase the arm activity space and pay attention to heat preservation;

(5) the equipment is placed flatly, and the height, the inclination angle and the head and neck positions of the headrest shell 1 are adjusted, so that people feel comfortable;

(6) the body lies flat, eyes are closed lightly, and the tongue tip is stuck to the front teeth, the action is slow, the action amount is not too large, and the body can sweat slightly;

(7) the palm and the feet can be as wide as the shoulders to be closed together by taking the spine as the center and taking the actions of the left and right symmetry to keep the body balanced;

(8) during the movement, the middle finger straightens and pulls other fingers to open, and then the arm is driven to straighten or bend; straightening the big toes and pulling other toes to open, so that the heel drives the legs to be straightened or bent;

(9) selecting single exercise for action, and exercising hands and feet separately; wherein, the action is freely selected according to the actual ability of each person and can be repeatedly carried out.

(10) When inhaling, the hands and feet are contracted, closed, bent and lifted; when breathing, the hands and feet are opened, laid flat, stretched and pressed down; the breathing conversion needs to wait for finishing the next action, and is slightly stopped, and the breathing-breathing is slowly matched with the action, the action is coherent, the breathing sense needs to be rhythmic, and the breathing is stable and the breathing mode of body building is consistent;

(11) when lying on the stomach and back, the hands and feet are not moved, the arms are stretched, the fingers are opened, and the thighs are stretched; when lying on stomach, the sole center is upward; during respiration, inspiration, abdomen flattening and pause, expiration, abdomen contraction and pause;

(12) in the hand and foot movement, the emphasis is on inspiration-expiration-inspiration, and the emphasis is not on abdominal contraction in expiration and abdominal flattening in inspiration;

(13) the palm holding method is suitable for sports; the arm is stretched, the finger tips are closed when the arm inhales, the finger tips are opened when the arm exhales, the action is slow, and the breathing is matched;

(14) exercise method on seat 21

A. The head and neck positions of the equipment are adjusted until the human body is comfortable;

B. the chin support device has poor bearing capacity on the body and can support the chin;

C. the legs are not moved, the fingertips of the middle fingers of the two hands are tightly attached, the palms are opened, the palms are upward, and the middle fingers are placed above the thighs; when inhaling, the palm is lifted to the upper part of the chest, then the palm is turned over, the palm center is downward, and a pause is made; when exhaling, the palm is pressed down to the upper part of the thigh, the palm is turned over, the palm center is upward, and a pause is made; the circulation is carried out, the action is slow, and the breathing is matched;

D. the palms are closed and matched in front of the chest; when inhaling, the hands are lifted to the upper part of the head, the arms are straightened and are stopped slightly; when the patient exhales, the palm is pulled downwards to the front of the chest, the eyes look at the palm, and the head bends downwards along with the upwarping of the eyes;

E. the palms are horizontal at the two sides of the shoulders, the arms are straightened, the palms are opened and are closed towards the chest, the arms exhale when opened and inhale when closed, and the eyes are level;

F. the palm is unfolded and held between the waists, the palm is upward in the palm center, and the eyes are leveled up; taking the heel as an axis, inhaling, tilting the toes and pausing slightly, and exhaling, pressing the toes and pausing slightly;

G. straightening the arms in front of the chest, looking straight at the eyes, and holding the arms with the hands as wide as the shoulders;

(15) prone-posture body-building method

A. The position, height and inclination angle of the chin of the equipment are adjusted until the human body is comfortable;

B. the body is in a prone position, and the equipment is placed at the position of the chin by two hands;

C. the body-building method is mainly static, and utilizes the gravity of the body-building method to correct the bending of the spine and the neck;

D. the toes are stretched backwards, the arch of the foot is upward, the instep is downward, the palm is downward, the fingertips are opened and placed on the two sides of the chin; when exhaling, both hands push and straighten the head and pause slightly; when in suction, the head is moved from the top to the two sides of the chin and stops slightly;

E. the palm moving interval is that the two sides of the shoulder are straightened to the two sides of the palm, and the palm slides on the two sides of the shoulder;

F. the arm placing interval is from two sides of the shoulder to the arm closing position above the head, the arm is stretched, the finger tip is opened, and the leg is stretched; when breathing in, the fingers bend and the fingertips merge together; when breathing, the fingers are opened, flattened and stopped slightly; wherein, the abdomen is opened and stops slightly when breathing in, and the abdomen is contracted and stops slightly when breathing out;

G. the toes are stretched backwards, the arch of the foot is upward, the instep is downward, the legs are stretched, the feet are closed to the region with the same width as the shoulders, the palms are positioned at the two sides of the abdomen, the arms are stretched, and the palms are opened;

g1, training breathing, opening the abdomen and pausing slightly during inspiration, contracting the abdomen and pausing slightly during expiration, slowing breathing rhythm and listening breathing sound;

g2, inhaling, and closing the palm and the finger tips to make a pause slightly; exhale, open the fingers, the palm is flat, pause slightly; attention is paid to rhythm, and the breath is slow and synchronously matched with the action;

(16) supine body-building method

A. The neck height and the head inclination angle of the equipment are adjusted to make the human body feel comfortable, and the equipment and the body are in line;

B. the tiptoes are vertical to the body, the two hands are placed on the two sides of the body, the palm is straightened, the palm center is upward, and the fingers are opened;

b1, training breathing;

b2, a palm holding method;

1. the arms are straightened to swing before the chest at the abdomen, the palms face upwards when the arms inhale and lift upwards, and the palms face downwards when the arms exhale;

2. arms are straightened at two sides of shoulders to swing to the front of the chest, the arms are closed when breathing in, and the arms are opened when breathing in;

C. the two hands are stretched towards the top of the head and have the same width as the shoulders, and a palm holding method is adopted;

D. leg exercise;

d1, keeping the hands immobile, placing on the two sides of the body with the palm upward and the fingertips open;

d2, taking the heel as an axis, tilting the exhaling toes upwards and pressing the inhaling toes downwards;

d3, toe training, heel immobilization, air suction toe bending, air exhalation toe straightening, action and breathing coordination, and slow action.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The utility model provides a health preserving headrest equipment which characterized in that: including headrest housing (1) and be located dorsal support chassis (2) of headrest housing (1), bearing trench (3) have been seted up on the front of headrest housing (1), bearing trench (3) include with head support portion (4) of human head looks adaptation, and keep away from neck support portion (5) that one side of head support portion (4) is the opening and with human neck looks adaptation, the back of headrest housing (1) relative with head support portion (4) position is articulated with head lift adjustment device's one end, head lift adjustment device's the other end is fixed on supporting chassis (2), the back of headrest housing (1) relative with neck support portion (5) position is articulated with neck lift adjustment device's one end, neck lift adjustment device's the other end is fixed on supporting chassis (2).

2. A health preserving headrest apparatus as claimed in claim 1, wherein: bearing trench (3) are still including setting up on neck support portion (5) and with chin groove (6) of human chin looks adaptation, the notch department lid of chin groove (6) is equipped with apron (7) and can dismantle, and the top surface of apron (7) flushes with the tank bottom face of neck support portion (5) mutually, or places the filler in chin groove (6) and can dismantle, and the top surface of filler flushes with the tank bottom face of neck support portion (5) mutually.

3. A health preserving headrest apparatus as claimed in claim 2, wherein: the bottom surface of the bearing groove position (3) is covered with a first cushion pad (8), and the top surface of the cover plate (7) or the filler is flush with the top surface of the first cushion pad (8).

4. A health preserving headrest apparatus as claimed in claim 1, wherein: ear supporting grooves (9) matched with ears of a human body are formed in the headrest shell (1) on the left side and the right side of the headrest part (4).

5. A health preserving headrest apparatus as claimed in claim 1, wherein: the head lifting adjusting device or/and the neck lifting adjusting device comprises a fixed seat (10) fixed on the headrest shell (1), the fixed seat (10) is hinged with a hinged seat through a rotating pin, and the hinged seat (11) is connected with the supporting chassis (2) through a telescopic assembly.

6. A health preserving headrest apparatus as claimed in claim 5, wherein: the telescopic assembly comprises a connecting plate (12) arranged on a fixed seat (10), the connecting plate (12) is connected with a supporting chassis (2) through a plurality of hinge groups, each hinge group is formed by two hinge rods (13) which are arranged in a crossed mode and hinged through hinge shafts, the hinge rods (13) of two adjacent hinge groups are hinged with each other, the hinge rods (13) of the hinge groups at the head end and the tail end are respectively hinged with the connecting plate (12) and the supporting chassis (2), an adjusting screw rod (14) is connected to the supporting chassis (2) in a threaded mode, the inner end of the adjusting screw rod (14) is connected with the hinge shaft of one hinge group, the outer end of the adjusting screw rod (14) is in transmission connection with a power source, and the adjusting screw rod (14) is driven by the power source to rotate inwards or outwards.

7. A health preserving headrest apparatus as claimed in claim 6, wherein: and a second cushion pad (15) is arranged between the fixed seat (10) and the connecting plate (12).

8. A health preserving headrest apparatus as claimed in claim 5, wherein: the periphery cover that is located flexible subassembly is equipped with dust cover (16), and the both ends of dust cover (16) are fixed respectively on fixing base (10) and support chassis (2).

9. A health preserving headrest apparatus as claimed in claim 1, wherein: still including mounting bracket (17) with external fixed connection, be provided with horizontal slide rail (18) that set up along the fore-and-aft horizontal direction on mounting bracket (17), sliding connection has lifting support (19) on horizontal slide rail (18), and lifting support (19) are gone up along vertical slide rail that is provided with, support chassis (2) sliding connection and just follow vertical setting in vertical slide rail, be provided with the locking subassembly one that is used for fixed lifting support (19) and horizontal slide rail (18) relative position between lifting support (19) and horizontal slide rail (18), support and be provided with the locking subassembly two that is used for fixed support chassis (2) and vertical slide rail relative position between chassis (2) and the vertical slide rail.

10. A health preserving headrest apparatus as claimed in claim 9, wherein: the first locking assembly and the second locking assembly comprise locking screws (20) which are in threaded connection with the lifting support (19) or the supporting chassis (2), the head ends of the locking screws (20) are sleeved with locking knobs, and the locking knobs of the inward knobs drive the tail ends of the locking screws (20) to move inwards and abut against horizontal sliding rails (18) or vertical sliding rails.

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