CN111388160A - Medical lumbar vertebra nursing device - Google Patents

Abstract

The invention discloses a lumbar vertebra care device for medical use, comprising a lumbar vertebra nursing support frame and a lumbar vertebra protection device. The lumbar vertebra protection device includes two sets of upper lumbar vertebrae shields and two sets of lower lumbar vertebrae shields, and the two sets of upper lumbar vertebrae shields pass through The connecting belt is connected, the left side of the lumbar upper guard plate is installed with a connecting belt buckle through a nylon webbing, and the left side of the fixing plate is installed with a connecting belt buckle through a nylon webbing. The upper end of the vertical plate is hinged with two sets of adjustment plates through the rotating shaft, and the upper end of the sliding plate is installed with a detachable lumbar spine protection device. The medical lumbar spine care device is small in size, easy to wear, easy to carry, more convenient to adjust the device, has a better effect of stabilizing the lumbar spine column, and is more conducive to later rehabilitation. The diversity of equipment, and the adjustment board to adjust the spacing, are suitable for users of different heights.

Description

A medical device for nursing lumbar spine

technical field

The invention relates to the field of medical care, in particular to a lumbar spine device for medical care.

Background technique

At present, some young and middle-aged people under the age of 30-40 cause spondylosis due to poor sitting posture when studying, reading and using computers, resulting in back pain, stiff neck, and chronic strain of the cervical and psoas muscles, which develop over time. Cervical spondylosis and lumbar spondylosis, currently, there are surgical treatment and non-surgical treatment, surgical treatment is destructive treatment, there are certain risks, and the price is expensive, the traditional method of non-surgical treatment is passive treatment, physiotherapy, traction, Fixation, air cushion drug treatment, and physiotherapy can only eliminate local aseptic inflammation, and cannot achieve the purpose of curing. The existing lumbar spine rehabilitation device has large equipment, complex structure, cumbersome operation and high cost. (Application No.: CN201621495445.2) A portable lumbar spine rehabilitation device can effectively solve the above problems, but there are problems. The internal battery is installed, which increases the weight of the device and imposes a burden on the lumbar spine. Fixed the need not to bend over.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to overcome the problems raised by the background technology and provide a medical device for nursing lumbar spine.

In order to achieve the above object, the present invention provides the following technical solutions: a medical lumbar vertebra care device, comprising a lumbar vertebra nursing support frame and a lumbar vertebra protection device, the lumbar vertebra protection device includes two sets of upper lumbar vertebrae guards and two sets of lower lumbar vertebrae guards, And the two sets of lumbar upper guard plates are connected by a connecting belt, the left side of the lumbar upper guard plate is installed with a connecting belt buckle through a nylon webbing, and a back strap is fixed on the right side of the lumbar upper guard plate, and a front pad and a fixing plate are installed on the back strap. A connecting belt buckle is installed on the left side through a nylon webbing, and the lumbar lower guard plate is connected to another group of lumbar lower guard plates through a connecting belt, and a back strap is fixed on the right side of the lumbar lower guard plate;

The lumbar vertebrae nursing support frame includes a sliding plate, an adjusting plate and a vertical plate, and the lower end of the vertical plate is provided with a universal wheel through a support leg, the upper end of the vertical plate is hinged with two sets of adjustment plates through a rotating shaft, and a sliding plate is installed inside the adjustment plate , a removable lumbar protection device is installed at the upper end of the sliding plate.

Further, the upper lumbar vertebrae guard plate is an upward convex structure, and the lower lumbar vertebrae guard plate is a downward convex structure. At the same time, the expansion and contraction structures of the lumbar upper guard plate and the lumbar lower guard plate on the same side fixed at the rear ends include telescopic structures. Rod and adjusting screw, and the side of the upper lumbar spine guard plate and the lower lumbar spine guard plate set on the right side are fixed with straps, and two sets of straps are installed with sliding and adjustable front pads, and the front pads are made of sponge material.

Further, the lumbar lower guard plate includes an outer protective layer provided on the outer side, an inner protective layer provided on the inner side, and an inner lining layer fixed between the outer protective layer and the inner protective layer, and the middle of the inner protective layer is provided with an arc-shaped protrusion. The convex block, and the inner protective layer above the convex block is provided with a pocket, the outer protective layer is made of canvas, and the convex block and the inner protective layer are made of silicone material. same.

Further, a fixing plate is fixed on the outer side of the lumbar lower guard plate, and a plug connector for inserting the sliding plate is fixed on the outer side of the fixing plate, and a telescopic structure is fixed on the upper end of the fixing plate, and the upper end of the telescopic structure is fixed on the supporting plate, and the supporting plate is fixed. Fixed on the back of the lumbar upper guard plate.

Further, the adjustment screw set in the middle of the telescopic structure rotates to push the distance between the upper lumbar vertebrae guard plate and the lower lumbar vertebrae guard plate, and the telescopic rods arranged on the side play an auxiliary adjustment effect, and at the same time, the upper end of the adjustment screw has a support plate connection to rotate. connected, and the screw in the middle of the adjusting screw rotates for telescopic adjustment.

Further, positioning bolts are installed on the top plate on the outer side of the telescopic rod installed at the upper end of the vertical plate, and the positioning bolts fix the rotation angle of the adjustment plate. The adjusting plate is vertically provided with a chute, the sliding plate slides inside the chute, and the adjusting bolt screwed on the sliding plate is inserted into the waist-shaped hole.

Further, the support legs arranged at the lower ends of the vertical plates are of a herringbone structure, and the two sets of horizontal plates arranged at the lower ends of the support legs are installed with universal wheels, and the vertical plates have an arc structure.

Further, the arc of the vertical plate is the same as that of the adjustment plate, the sliding plate installed on the adjustment plate corresponds to the plug connector, the plug connector is made of plastic, and the side surface of the plug connector is hinged on the fixed plate.

Further, the vertical plate and the support legs arranged on the lumbar vertebra nursing support frame form a structure that bends backwards, so that the universal wheel arranged at the lower end is effectively away from the heel of the person, and avoids contact with the universal wheel during walking.

Further, the fixing plate has three parts of plastic plates hinged together, and the adjacent two groups can rotate horizontally, and the plastic plate arranged in the middle is fixed on the lower end of the adjusting screw, and the plastic plates arranged on both sides are fixed on the lower ends of the two sets of telescopic rods. , so that the fixed plate can change shape with the transformation of the upper lumbar shield and the lower lumbar shield, and the upper fixed support plate is also composed of three parts hinged

Compared with the prior art, the beneficial effects of the present invention are: the medical lumbar vertebra care device is set in combination with a lumbar vertebra protection device and a lumbar vertebra nursing support frame, and has a wider application range, and adopts a telescopic rod and an adjusting screw to replace the existing one. The air cylinder and motor reduce the weight of the equipment, small size, easy to wear, easy to carry, make the adjustment of the equipment more convenient, stabilize the lumbar column better, and be more conducive to the later rehabilitation. , increase the diversity of equipment, and adjust the spacing of the adjustment board, which is suitable for users of different heights.

Description of drawings

Fig. 1 is the front view schematic diagram of the structure of the present invention;

Fig. 2 is the schematic diagram of the lumbar vertebra protection device of the structure of the present invention;

Fig. 3 is the schematic diagram of the lumbar spine nursing support frame of the structure of the present invention;

4 is a schematic diagram of the installation of the adjustment plate of the structure of the present invention;

Fig. 5 is the sectional schematic diagram of the lumbar lower guard plate of the structure of the present invention;

Fig. 6 is the inner side schematic diagram of the lumbar upper guard plate of the structure of the present invention;

Fig. 7 is the inner side schematic diagram of the lumbar lower guard plate of the structure of the present invention;

8 is a schematic side view of a vertical plate of the structure of the present invention;

Fig. 9 is the structure schematic diagram of the fixing plate of the structure of the present invention;

10 is a schematic diagram of the deformation of the lumbar spine protection device of the structure of the present invention;

11 is a schematic diagram of the deformation of the lumbar spine nursing support frame of the structure of the present invention.

In the picture: 1. Lumbar vertebra care support frame; 2. Lumbar vertebra protection device; 3. Upper lumbar vertebrae guard plate; 4. Nylon webbing; Plate; 9. Connecting belt; 10. Strap; 11. Front pad; 12. Telescopic rod; 13. Adjusting screw; 14. Telescopic structure; 15. Support plate; 16. Universal wheel; 17. Support leg; 18. Sliding plate; 19, adjusting plate; 20, positioning bolt; 21, rotating shaft; 22, waist hole; 23, adjusting bolt; 24, vertical plate; 25, chute; 26, outer protective layer; 27, inner lining ; 28, convex cushion block; 29, inner protective layer; 30, place the bag.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-9. A medical lumbar spine care device according to the first embodiment of the present invention includes a lumbar spine care support frame 1 and a lumbar spine protection device 2. The lumbar spine protection device 2 includes two sets of lumbar upper guard plates 3 and two sets of lumbar spine protection. The lower guard plate 6, and the two groups of lumbar upper guard plates 3 are connected by a connecting belt 9, the left side of the lumbar upper guard plate 3 is provided with a connecting belt buckle 5 through a nylon webbing 4, and the right side of the lumbar upper guard plate 3 is fixed with a strap 10 , and the front pad 11 is installed on the strap 10, the left side of the fixing plate 8 is installed with a connecting belt buckle 5 through the nylon webbing 4, and the lower lumbar shield 6 is connected by the connecting belt 9. Another group of lower lumbar shields 6, and The back strap 10 is fixed on the right side of the lumbar lower guard plate 6. The lumbar vertebra care support frame 1 includes a sliding plate 18, an adjustment plate 19 and a vertical plate 24, and the lower end of the vertical plate 24 is installed with a universal wheel 16 through the support leg 17, and the upper end of the vertical plate 24 is installed. Two sets of adjustment plates 19 are hinged through the rotating shaft 21, and a sliding plate 18 is installed inside the adjustment plate 19. The upper end of the sliding plate 18 is installed with a detachable lumbar spine protection device 2. When a person cannot bend down, first wear the device to the body It can also be adjusted according to the height, shortness, fatness and thinness of the human body. The lumbar spine protection device 2 reduces the pressure on the lumbar spine. The two sets of lumbar upper guard plates 3 are fixed on the back, and the two sets of lumbar upper guard plates 3 are connected on the side The belt buckle 5 and the strap 10 are wrapped around the chest of the human body. At the same time, the front pad 11 protects the chest. At the same time, the height of the hinged telescopic structure 14 is hinged by rotating the adjustment screw 13, so that the lower lumbar shield 6 is fixed under the waist. The connecting belt buckle 5 and the back strap 10 on the side of the side lumbar lower guard plate 6 are fixed on the lower abdomen, and the front pad 11 plays a protective effect. After fixing, the sliding plate 18 can be adjusted on the adjustment plate 19, so that the adjustment plate 19 The upper end is placed inside the plug connector 7 to prevent the patient from bending over, and at the same time, the universal wheel 16 provided at the bottom of the lumbar vertebra nursing support frame 1 can play a role in facilitating movement;

The upper lumbar spine guard plate 3 is an upward convex structure, and the lower lumbar spine guard plate 6 is a downward convex structure. , and the buttocks will not contact the lower lumbar shield 6, and the telescopic structure 14 fixed at the rear end of the upper lumbar shield 3 and the lower lumbar shield 6 on the same side includes a telescopic rod 12 and an adjusting screw 13, and the lumbar upper shield provided on the right The side of the guard plate 3 and the lower lumbar guard plate 6 are fixed with a back strap 10, and both sets of back straps 10 are installed with a front pad 11 that can be slidably adjusted. The strap 10 directly contacts the human body, which has a good protective effect and improves comfort. The adjusting screw 13 arranged in the middle of the telescopic structure 14 rotates to push the upper lumbar shield 3 and the lower lumbar shield 6 to open, and the telescopic rods arranged on the side 12 has the effect of auxiliary adjustment. At the same time, the upper end of the adjustment screw 13 is connected with the support plate 15 for rotation, and the screw in the middle of the adjustment screw 13 rotates for telescopic adjustment to adapt to different heights of users. When the user is taller, adjust by rotating The screw 13 enters the distance between the push support plate 15 and the fixed plate 8, so that the opening distance of the upper lumbar shield 3 and the lower lumbar shield 6 is increased, and the entry adapts to different heights;

The outer side of the lumbar lower guard plate 6 is fixed with a fixed plate 8, and the outer side of the fixed plate 8 is fixed with a plug connector 7 that is inserted into the sliding plate 18, and the upper end of the fixed plate 8 is fixed with a telescopic structure 14, and the upper end of the telescopic structure 14 is fixed on the support plate 15 , and the support plate 15 is fixed on the rear side of the upper lumbar vertebrae guard plate 3, so that the telescopic structure 14 plays a very good role in lumbar vertebra fixation. And the inner lining layer 27 fixed between the outer protective layer 26 and the inner protective layer 29, and the middle of the inner protective layer 29 is provided with an arc-shaped convex convex pad 28, and the inner protective layer 29 above the convex pad 28 is provided with There is a placing bag 30, the outer protective layer 26 is made of canvas material, and the convex block 28 and the inner protective layer 29 are made of silicone material, and the lower lumbar spine guard plate 6 and the upper lumbar spine guard plate 3 have the same structure, and some traditional Chinese medicines for promoting blood can be placed. It is placed inside the bag 30, and at the same time, the raised bumps 28 arranged inside the inner protective layer 29 can effectively fit on the back of the user. The outer protective layer 26, the inner lining layer 27 and the inner protective layer 29 are provided with a ventilation structure to improve comfort. The vertical plate 24 and the supporting legs 17 provided on the lumbar vertebra care support frame 1 form a structure that is bent backwards, so that the universal The wheel 16 is effectively away from the person's heel to avoid contact with the universal wheel 16 during walking. When the human body is walking, the heel will be backward, and then it is easy to meet the rear end of the head. The arc-shaped bending is used to meet the needs of the human body. The fixing plate 8 has three parts of plastic plates hinged together, and the adjacent two groups can rotate horizontally, and the plastic plate arranged in the middle is fixed on the lower end of the adjusting screw 13, and the plastic plates arranged on both sides are fixed on the lower ends of the two sets of telescopic rods 12, So that the fixed plate 8 can change shape with the transformation of the upper lumbar spine guard plate 3 and the lower lumbar spine guard plate 6, and at the same time the upper fixed support plate 15 is also composed of three parts hinged, so that the upper lumbar spine guard plate 3 and the lower lumbar spine guard plate 6 It can fit better on the back and is more comfortable;

A positioning bolt 20 is installed on the top plate outside the telescopic rod 12 installed on the upper end of the vertical plate 24, and the positioning bolt 20 fixes the rotation angle of the adjustment plate 19. Loosen the positioning bolt 20 so that the adjustment plate 19 can rotate around the rotating shaft 21, and the adjustment is good. Angle, tighten the positioning bolts 20 to make the angle between the adjustment plate 19 and the vertical plate 24 fixed, and loosen the adjustment bolts 23 to adjust the sliding plate 18 and the adjustment plate 19 inside, then fix the sliding plate 18 inside the adjustment plate 19, adjust the sliding The height of the plate 18 inside the adjustment plate 19, and the distance between the two sets of sliding plates 18, and the adjustment plate 19 is an arc structure, and the outer side of the adjustment plate 19 is provided with a waist-shaped hole 22, and the adjustment plate 19 is vertically opened with a The sliding groove 25, the arc-shaped section of the sliding plate 18 is fitted with the arc-shaped side surface of the sliding groove 25 inside the adjusting plate 19, so as to prevent the sliding plate 18 from rotating around the adjusting bolt 23, the sliding plate 18 slides inside the sliding groove 25, and the sliding plate The adjusting bolt 23 screwed on the 18 is inserted into the waist-shaped hole 22, the supporting leg 17 provided at the lower end of the vertical plate 24 is a herringbone structure, and the two sets of horizontal plates provided at the lower end of the supporting leg 17 are installed with the universal wheel 16, and the vertical The plate 24 has an arc structure, the supporting legs 17 provided at the bottom prevent the user's feet from contacting, the arc of the vertical plate 24 is the same as that of the adjustment plate 19, and the sliding plate 18 installed on the adjustment plate 19 corresponds to the plug connector 7 , and the plug connector 7 is made of plastic material, and the side surface of the plug connector 7 is hinged on the fixed plate 8, the 18 slides inside the 19, the position of the upper socket changes, the fixed 7 cannot meet the installation, and the set plug 7 can be rotated to meet the needs of the user The needs of different heights, the use of a wider range.

In the second embodiment of the present invention, a medical lumbar spine care device is basically the same as the first embodiment, as shown in FIG. 10 , the difference is that the two sets of rotatable adjustment plates 19 on the lumbar spine care support frame 1 are changed. It is a set of fixed adjustment plates 19. The sliding plate 18 inside the adjustment plate 19, which can be adjusted up, down, left and right at will, is adjusted to be only left and right adjustment, and the up and down adjustment work is realized by the adjustable vertical plate 24, and the vertical plate 24 is replaced with inside and outside. The pipeline is set, and the positioning bolts on the side are used to realize the fixation after height adjustment. The height adjustment can be realized through the vertical plate 24. When in use, the lumbar spine protection device 2 is fixed on the patient, and then the vertical plate 24 is adjusted according to the height. Height, loosen the positioning bolts at the rear end of the vertical plate 24, pull the inner tube at the upper end of the vertical plate 24, then tighten the positioning bolts to fix the height, and loosen the adjusting bolts 23 to adjust the position of the sliding plate 18 inside the adjusting plate 19, and then adjust the sliding plate 18 The upper end is inserted inside the plug connector 7, and the telescopic structure 14 and the vertical plate 24 cannot be rotated and bent in the same vertical direction, so that the user can be prevented from bending over.

In the third embodiment of the present invention, a medical device for nursing the lumbar spine is basically the same as the first embodiment, as shown in FIG. 11 , the difference is that two sets of upper lumbar spine guards 3 are integrated into one set, and at the same time the two sets of The lower lumbar spine guard plate 6 is also integrated into a group to increase or decrease the integrity of the structure, and a trapezoidal groove is arranged in the lower middle of the lower lumbar spine guard plate 6, which will not block the buttocks. When the lumbar spine protection device 2 is used alone, it will not be Affects the bending of the waist, and the heating device or the traditional Chinese medicine ingredients placed in the middle of the straps 30 inside the upper lumbar shield 3 and the lower lumbar shield 6 can completely cover the lumbar position, making the lumbar vertebra care more comprehensive.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A medical care lumbar spine device, comprising a lumbar spine care support frame (1) and a lumbar spine protection device (2), characterized in that: the lumbar spine protection device (2) comprises two groups of lumbar spine upper guard plates (3) and two The lower lumbar spine guard plate (6) is assembled, and the two sets of lumbar spine upper guard panels (3) are connected by a connecting belt (9), and the left side of the lumbar spine upper guard plate (3) is installed with a connecting belt buckle (5) through a nylon webbing (4). ), and a back strap (10) is fixed on the right side of the lumbar upper guard plate (3), and a front pad (11) is installed on the back strap (10), and the left side of the fixing plate (8) is connected with a nylon webbing (4) the belt buckle (5), and the lower lumbar shield (6) is connected to another group of lower lumbar shields (6) through the connecting belt (9), and a back strap (10) is fixed on the right side of the lower lumbar shield (6); The lumbar vertebra care support frame (1) comprises a sliding plate (18), an adjustment plate (19) and a vertical plate (24), and the lower end of the vertical plate (24) is provided with a universal wheel (16) through a support leg (17), The upper end of the vertical plate (24) is hinged with two sets of adjustment plates (19) through the rotating shaft (21), and a sliding plate (18) is installed inside the adjustment plate (19), and a removable lumbar spine protection device is installed at the upper end of the sliding plate (18). (2). 2 . The lumbar spine device for medical care according to claim 1 , wherein the upper lumbar spine guard plate (3) is an upward convex structure, and the lower lumbar spine guard plate (6) is a downward convex structure. 3 . At the same time, the telescopic structure (14) fixed at the rear end of the upper lumbar vertebra guard plate (3) and the lower lumbar vertebra guard plate (6) on the same side includes a telescopic rod (12) and an adjusting screw (13), and the lumbar vertebrae set on the right Straps (10) are fixed on the sides of the upper guard plate (3) and the lower lumbar shield (6), and front pads (11) that can be slidably adjusted are installed on the two sets of straps (10). The front pads (11) ) is made of sponge material. 3. A medical device for nursing the lumbar spine according to claim 1, characterized in that: the lower lumbar spine guard plate (6) comprises an outer protective layer (26) arranged on the outside and an inner protective layer (29) arranged on the inside And the inner lining layer (27) fixed between the outer protective layer (26) and the inner protective layer (29), and the middle of the inner protective layer (29) is provided with an arc-shaped convex convex pad block (28), and the convex pad The inner protective layer (29) above the block (28) is provided with a pocket (30), the outer protective layer (26) is made of canvas, and the convex block (28) and the inner protective layer (29) are made of silica gel. The lower lumbar spine guard plate (6) and the upper lumbar spine guard plate (3) have the same structure. 4. A medical lumbar spine device according to claim 1, characterized in that: a fixing plate (8) is fixed on the outer side of the lumbar lower guard plate (6), and a plug connection is fixed on the outer side of the fixing plate (8). The plug connector (7) of the sliding plate (18), and the upper end of the fixing plate (8) is fixed with a telescopic structure (14), the upper end of the telescopic structure (14) is fixed on the support plate (15), and the support plate (15) is fixed on the The rear side of the lumbar upper guard plate (3). 5. A medical lumbar vertebra care device according to claim 2, characterized in that: the adjusting screw (13) provided in the middle of the telescopic structure (14) rotates and pushes the upper lumbar vertebrae guard plate (3) and the lower lumbar vertebrae guard plate (6) The distance is widened, and the telescopic rod (12) provided on the side has the effect of assisting adjustment. At the same time, the upper end of the adjusting screw (13) is connected with the support plate (15) for rotation, and the screw in the middle of the adjusting screw (13) is rotated. Make telescopic adjustment. 6. A medical lumbar spine device according to claim 1, characterized in that: a positioning bolt (20) is installed on the top plate outside the telescopic rod (12) mounted on the upper end of the vertical plate (24), and the positioning The bolts (20) fix the rotation angle of the adjustment plate (19), while the adjustment plate (19) has an arc structure, and the outside of the adjustment plate (19) is provided with a waist-shaped hole (22), and the adjustment plate (19) is opened vertically There is a sliding groove (25), the sliding plate (18) slides inside the sliding groove (25), and the adjusting bolt (23) screwed on the sliding plate (18) is inserted into the waist-shaped hole (22). 7. A medical lumbar vertebra care device according to claim 1, characterized in that: the supporting legs (17) provided at the lower ends of the vertical plates (24) are of a herringbone structure, and the two supporting legs (17) are provided at the lower ends. A universal wheel (16) is installed on the horizontal plate of the group, and the vertical plate (24) has an arc structure. 8 . The lumbar spine device for medical care according to claim 1 , wherein the arc shape of the vertical plate ( 24 ) is the same as that of the adjustment plate ( 19 ), and the adjustment plate ( 19 ) is installed on the adjustment plate ( 19 ). 9 . The sliding plate (18) corresponds to the plug connector (7), the plug connector (7) is made of plastic material, and the side surface of the plug connector (7) is hinged on the fixing plate (8). 9 . The medical device for nursing lumbar spine according to claim 1 , wherein the vertical plate ( 24 ) and the supporting legs ( 17 ) provided on the lumbar spine nursing support frame ( 1 ) form a structure that is bent backwards. 10 . , so that the universal wheel (16) provided at the lower end is effectively away from the heel of the person, so as to avoid contact with the universal wheel (16) during walking. 10. A medical device for nursing lumbar spine according to claim 1, characterized in that: the fixing plate (8) has three parts of plastic plates hinged together, and two adjacent groups can be rotated horizontally, and the plastic plate arranged in the middle The plate is fixed on the lower end of the adjusting screw (13), and the plastic plates arranged on both sides are fixed on the lower ends of the two sets of telescopic rods (12), so that the fixed plate (8) can follow the upper lumbar shield (3) and the lower lumbar shield ( 6) to change the shape, and at the same time the upper fixed support plate (15) is also composed of three parts hinged.

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