A surgical chevron position foot decompression support device

Abstract

This invention relates to the field of medical auxiliary technology, specifically to a surgical A-shaped foot decompression support device. It includes an A-shaped bed and a base. The base has a sliding groove at its top, within which symmetrically sliding adjusting blocks slide laterally. Each adjusting block has a fixedly connected sleeve rod at its top, and each sleeve rod has a vertically sliding slide rod within it. Each slide rod has a protective component at its top for isolating surgical drapes. The sliding groove contains a width adjustment component for driving the adjusting blocks to slide synchronously and oppositely laterally within the groove. Each sleeve rod contains a height adjustment component for driving the slide rod to slide vertically along the sleeve rod. A support base is fixedly connected to the center of the sliding groove. This invention, through the design of the adjusting blocks, sleeve rods, and slide rods, can quickly and synchronously adjust the support height and spacing of the support space, allowing the support space to dynamically adapt to changes in foot size, thereby achieving better isolation and reducing the risk of pressure sores.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary technology, specifically to a surgical foot decompression support device with a human-shaped design. Background Technology

[0002] In minimally invasive laparoscopic surgeries, especially radical gastrectomy for gastric cancer, which require patients to be positioned in a "V" shape, the patient's legs need to be spread apart at approximately 30° to 60° to create a V-shaped space between the legs, facilitating the surgeon's standing operation. These surgeries are typically lengthy, often lasting 3 to 4 hours or more. During the procedure, the patient's feet are often covered with multiple layers of sterile surgical drapes, which droop due to gravity, easily causing continuous pressure on the instep and toes, affecting peripheral blood circulation and increasing the risk of pressure sores.

[0003] To alleviate the aforementioned problems, relevant technologies have proposed auxiliary devices for supporting the feet. For example, Taizhou People's Hospital has developed a foldable foot support frame for laparoscopic anterior-shaped minimally invasive surgery. It includes two foldable support frame components, each consisting of a foldable disc and a footplate. The footplate can be fixed to a side support at the end of the operating table. The patient's feet are placed in the space enclosed by the disc and the sealed base plate. A sterile dressing is placed on top of the disc, thereby reducing the direct pressure of the dressing on the instep.

[0004] However, in practical applications, such devices struggle to flexibly adjust the support height and spacing of the support space according to patient body size differences, making it difficult to adapt to the surgical support needs of different groups. If the support space is too small, the patient's foot cannot be fully inserted, resulting in poor isolation from the surgical drapes and a higher risk of pressure sores. If the support space is too large, it can interfere with the surgeon's operation, leading to poor surgical outcomes. Therefore, this invention provides a human-shaped foot decompression support device for surgery to solve the above problems. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a surgical foot decompression support device with an ergonomic design. Through the design of an adjusting block, a sleeve rod, and a sliding rod, the support height and support spacing of the support space can be quickly and synchronously adjusted, allowing the support space to dynamically adapt to changes in foot size, thereby achieving a better isolation effect and reducing the risk of pressure sores.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A surgical foot decompression support device in a V-shape includes a V-shaped hospital bed and a base. A sliding groove is formed at the top of the base. Adjusting blocks are symmetrically and laterally slidably fitted onto the bottom wall of the sliding groove. Each adjusting block has a fixedly connected sleeve rod at its top. Each sleeve rod has a vertically slidable sliding rod inside it. Each sliding rod has a protective component at its top for isolating surgical drapes. A width adjustment component is provided within the sliding groove for driving the adjusting blocks to slide synchronously and laterally along the bottom wall of the sliding groove. Each sleeve rod has a height adjustment component for driving the sliding rod to slide vertically along the sleeve rod. A support base is fixedly connected to the middle of the sliding groove. A placement component for providing flexible support to the heel is provided at the top of the support base. A binding component for fixing the foot is provided on the sleeve rod. A fixing component for fixing the base to the top of the V-shaped hospital bed is provided at the bottom of the base.

[0007] The technical principle of the above solution is as follows:

[0008] The base is fixed to the top of the A-frame hospital bed using a fixing component. The patient's foot is placed on the placement component, and the sleeve, sliding rod, and protective components form an elliptical support space. Surgical drapes are placed above this support space, encasing the patient's foot within it. Depending on the width of the patient's foot, a width adjustment component drives adjusting blocks to move closer together along the bottom wall of the sliding groove. These adjusting blocks, in turn, move the sleeve and sliding rod closer together, and the sliding rod further moves the protective components closer together. Simultaneously, a height adjustment component drives the sliding rod to slide downwards along the sleeve, which in turn moves the protective components downwards, thus gradually reducing the support space formed by the sleeve, sliding rod, and protective components; conversely, the support space gradually increases as the foot decreases. A binding component is then used to bind the patient's instep and arch, securing the foot between the sleeves.

[0009] The above approach has the following beneficial effects:

[0010] 1. Existing support devices mainly rely on the A-frame bed to directly support the patient's feet. During prolonged surgery, the patient's heel may experience discomfort or even pressure sores due to the compression between the A-frame bed and the patient's heel. This invention provides flexible support for the patient's heel, effectively reducing pressure on the heel. At the same time, by binding the patient's instep and arch, the pressure on the patient's foot is distributed to the support rod, effectively reducing the compression between the patient's heel and the A-frame bed, further reducing the risk of pressure sores and improving the patient's foot comfort.

[0011] 2. Existing support devices, such as support structures composed of foldable discs, have a circular shape, which does not conform to the shape and structure of the human foot. This makes it difficult to place the patient's foot and occupies unnecessary surgical space, affecting the surgical procedures performed by medical staff. The present invention constructs the support space in an elliptical shape, which better conforms to the shape and structure of the human foot. This makes it easier for medical staff to place the patient's foot according to the shape of the support structure, and reduces the occupation of surgical space while ensuring the support effect, thus facilitating the surgical procedures performed by medical staff.

[0012] 3. Existing support devices, due to their fixed structure, make it difficult to flexibly adjust the support height and spacing of the support space according to the patient's body size. This invention, through the lateral sliding of the adjusting block and the vertical sliding of the sliding rod, quickly and synchronously adjusts the support height and spacing of the support space, enabling the support space to dynamically adapt to changes in foot size, thereby achieving a better isolation effect, reducing the risk of pressure ulcers, and at the same time reducing the occupation of the surgical space, making it easier for medical staff to perform surgical operations.

[0013] Furthermore, the protective components include support plates fixedly connected to the top of the slide bar, and all support plates are arc-shaped.

[0014] Beneficial effects: This solution sets the support plate in an arc shape to match the natural physiological curve of the patient's toes. This not only effectively isolates the surgical drapes but also prevents the support plate itself from putting pressure on the patient's toes, thus effectively reducing the risk of pressure sores.

[0015] Furthermore, the width adjustment assembly includes a controller and a dual-head drive unit embedded in the support base. Threaded rods are fixedly connected to the output shafts on both sides of the dual-head drive unit, with the threaded rods rotating in opposite directions. Adjustment blocks are threadedly engaged with their adjacent threaded rods. The controller is used to control the operation of the dual-head drive unit.

[0016] Beneficial effects: The design of the threaded rod allows the adjustment blocks on both sides to slide symmetrically, ensuring the feasibility of the width adjustment function; the patient's foot only needs to be placed in the center without repeated movement, which improves the convenience of width adjustment.

[0017] Furthermore, the height adjustment assembly includes a piston rod fixedly connected to the bottom of the slide rod, a piston plate fixedly connected to the bottom of the piston rod, and the piston plates sliding vertically with the inner side wall of the sleeve rod; the base is provided with a pneumatic assembly for driving the piston plates to slide vertically along the inner side wall of the sleeve rod.

[0018] Beneficial effects: This solution achieves stepless and stable adjustment of the height of the slide rod and support plate by adopting a structure in which the piston rod, piston plate and sleeve inner wall slide together.

[0019] Furthermore, the pneumatic assembly includes piston chambers symmetrically opened in the base, each piston chamber having a laterally sliding air supply plate, each air supply plate having a bent rod fixedly connected to one side, the end of the bent rod away from the air supply plate extending to the outside of the piston chamber, and the top of each bent rod being fixedly connected to the bottom of its adjacent adjusting block; each piston chamber is connected to its adjacent sleeve rod.

[0020] Beneficial effects: This solution utilizes the sliding of the adjusting block to achieve height adjustment of the support plate, allowing width and height adjustments to be carried out simultaneously and in a coordinated manner. This results in faster and more efficient support space, thereby improving the isolation effect of the device on the surgical drape.

[0021] Furthermore, the placement component includes a placement pad that is fixedly connected to the top of the support base, and the top of the placement pad is arc-shaped.

[0022] Beneficial effects: This solution provides flexible support and effective protection for the heel by setting up a placement pad with an arc-shaped top, which conforms to the physiological curvature of the patient's heel.

[0023] Furthermore, the binding component includes a ring-shaped constraint band, with buckles fixedly connected to the outer walls of the sleeve rod, and symmetrically fixedly connected to the outer walls of the constraint band with fasteners, which are detachably connected to the adjacent buckles.

[0024] Beneficial effects: This solution uses a ring-shaped restraint strap combined with a detachable connection structure of buckles and clips to effectively bind the patient's instep and arch, so that the foot is stably fixed between the two sleeves, reducing the risk of pressure sores on the patient's foot, and improving the stability of the patient's foot during the operation.

[0025] Furthermore, a mounting plate is detachably connected to the side wall of the base, and a transparent observation plate is fixedly connected to the top of the mounting plate. The side walls of the support plate abut against the side walls of the observation plate.

[0026] Beneficial effects: This solution creates a relatively enclosed yet easy-to-observe foot observation window by setting a transparent observation plate on the side wall of the base and abutting the side wall of the support plate against the side wall of the observation plate. This prevents the surgical drape from compressing the patient's foot while allowing medical staff to quickly observe whether there are any abnormalities in the patient's foot.

[0027] Furthermore, several ventilation holes are provided on both the support plate and the restraint band.

[0028] Beneficial effects: This solution significantly improves air circulation around the patient's feet by creating several ventilation holes in the curved support plate and restraint straps, thereby enhancing the patient's foot comfort.

[0029] Furthermore, the fixing component includes a conical seat fixedly connected to the bottom of the base, and straps are symmetrically fixedly connected to the bottom of the conical seat.

[0030] Beneficial effects: This solution uses a conical base with symmetrical straps to fix the base to the top of the A-frame bed, which improves the stability of foot support and protection. Attached Figure Description

[0031] Figure 1 This is an isometric view of the human-shaped foot decompression support device for surgical use according to the present invention.

[0032] Figure 2 This is a schematic diagram of the installation of the A-shaped foot decompression support device for surgical use and the A-shaped hospital bed of the present invention.

[0033] Figure 3 This is an isometric sectional view of the human-shaped foot decompression support device for surgical use according to the present invention.

[0034] Figure 4 This is an isometric view of the width adjustment component in the human-shaped foot decompression support device for surgical use according to the present invention.

[0035] Figure 5 This is a cross-sectional view of the height adjustment component in the human-shaped foot decompression support device for surgical use according to the present invention.

[0036] The reference numerals in the accompanying drawings of the instruction manual include: 1. base; 2. observation plate; 3. sleeve rod; 4. slide rod; 5. support plate; 6. restraint strap; 7. placement pad; 8. support seat; 9. threaded rod; 10. adjusting block; 11. bending rod; 12. air supply plate; 13. piston rod; 14. piston plate; 15. A-frame hospital bed; 16. conical seat; 17. strap. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The following detailed description illustrates the specific implementation method:

[0041] Example 1:

[0042] like Figure 1 and Figure 2 As shown, a surgical foot decompression support device with an A-shaped shape includes an A-shaped bed 15 and a base 1. The top of the base 1 has a sliding groove, and the bottom wall of the sliding groove is symmetrically and laterally fitted with adjusting blocks 10. The top of each adjusting block 10 is bolted to a sleeve rod 3, and each sleeve rod 3 is vertically fitted with a sliding rod 4.

[0043] like Figure 2 As shown, the base 1 has a fixing assembly at its bottom for fixing the base 1 to the top of the A-frame hospital bed 15. The fixing assembly includes a conical seat 16 bolted to the bottom of the base 1, and straps 17 are symmetrically and adhesively fixed to the bottom of the conical seat 16.

[0044] Specifically, such as Figure 2 As shown, before the operation, medical staff guided the patient to lie flat on the A-frame bed 15. Based on the length of the patient's legs, the cone-shaped seat 16 was tied to the bed with straps 17 to provide stable support for subsequent foot support and protection.

[0045] like Figure 1 and Figure 2 As shown, a support base 8 is bolted to the middle of the sliding groove, and a placement component for flexibly supporting the heel is provided on the top of the support base 8. The placement component includes a placement pad 7 (in this embodiment, the placement pad 7 is made of medical silicone material) which is fixedly adhered to the top of the support base 8, and the top of the placement pad 7 is arc-shaped.

[0046] Specifically, such as Figure 2 As shown, after the conical seat 16 is secured, the medical staff places the patient's heel on top of the placement pad 7. The placement pad 7 will deform according to the shape of the patient's heel, thereby providing flexible support for the patient's heel and reducing the risk of pressure sores on the patient's heel during the operation.

[0047] like Figure 2As shown, each of the slide bars 4 is equipped with a protective component at its top for isolating surgical drapes. The protective component includes a support plate 5 bolted to the top of the slide bar 4, and the support plate 5 is arc-shaped.

[0048] Specifically, such as Figure 2 As shown, the arc-shaped support plate 5 and the placement pad 7, together with the sliding rod 4 and the sleeve rod 3, can form an elliptical support space. The patient places their foot in this support space. The support plate 5 can support the surgical drape on the top of the toes, and the sliding rod 4 and the sleeve rod 3 can support the surgical drape on the left and right sides of the sole of the foot, thereby isolating the patient's foot from the surgical drape and effectively avoiding the surgical drape from compressing the patient's foot for a long time during the operation.

[0049] like Figure 3 and Figure 4 As shown, a width adjustment assembly is provided in the sliding groove for driving the adjusting blocks 10 to slide synchronously and laterally along the bottom wall of the sliding groove. The width adjustment assembly includes a controller and a double-headed drive unit embedded in the support base 8. Threaded rods 9 are bolted to the output shafts on both sides of the double-headed drive unit, with the threaded rods 9 rotating in opposite directions. The adjusting blocks 10 are threadedly engaged with their adjacent threaded rods 9. The controller is used to control the operation of the double-headed drive unit.

[0050] Specifically, such as Figure 3 As shown, different patients have varying foot widths. Medical staff can activate the dual-head motor via a controller. The output shaft of the dual-head motor drives the threaded rod 9 to rotate. Since the two threaded rods 9 rotate in opposite directions, and the adjusting blocks 10 are threadedly engaged with their adjacent threaded rods 9, the adjusting blocks 10 move towards each other when the threaded rods 9 rotate. In this embodiment, when the threaded rods 9 rotate clockwise, the adjusting blocks 10 move closer together, thereby causing the sleeve rod 3, slide rod 4, and support plate 5 to move closer together, thus adapting to patients with narrower feet. Conversely, when the threaded rods 9 rotate counterclockwise, the adjusting blocks 10 move further apart, thereby causing the sleeve rod 3, slide rod 4, and support plate 5 to move further apart, thus adapting to patients with wider feet, improving the adaptability and effectiveness of the protection.

[0051] like Figure 5 As shown, each sleeve 3 is equipped with a height adjustment assembly for driving the slide rod 4 to slide vertically along the sleeve 3. The height adjustment assembly includes a piston rod 13 bolted to the bottom of the slide rod 4, and a piston plate 14 bolted to the bottom of the piston rod 13. The piston plates 14 slide vertically against the inner wall of the sleeve 3. The base 1 is equipped with a pneumatic assembly for driving the piston plates 14 to slide vertically along the inner wall of the sleeve 3. (See diagram for details.) Figure 3 and Figure 4As shown, the pneumatic assembly includes piston chambers symmetrically opened in the base 1. Each piston chamber has a transversely sliding air supply plate 12. A bent rod 11 is bolted to one side of each air supply plate 12. The end of the bent rod 11 away from the air supply plate 12 extends to the outside of the piston chamber. The top of the bent rod 11 is bolted to the bottom of its adjacent adjusting block 10. Each piston chamber is connected to its adjacent sleeve rod 3.

[0052] Specifically, such as Figure 3 and Figure 4 As shown, when the adjusting blocks 10 approach each other, the adjusting blocks 10 will drive the bending rods 11 to approach each other, thereby driving the piston plate 14 to slide along the piston cavity towards the middle of the base 1, thereby drawing the gas in the sleeve rod 3 into the piston cavity. At this time, the piston plate 14 and the piston rod 13 will slide down along the inner wall of the sleeve rod 3, thereby driving the slide rod 4 to slide down along the inner wall of the sleeve rod 3. The support plate 5 will also move down synchronously, thereby reducing the width of the support space and the height of the support space, adapting to patients with different foot heights.

[0053] like Figure 1 and Figure 2 As shown, the sleeve rod 3 is equipped with a binding assembly for fixing the feet. The binding assembly includes a ring-shaped constraint band 6, and buckles are fixedly glued to the outer walls of the sleeve rod 3. Connecting buckles are symmetrically fixedly glued to the outer walls of the constraint band 6, and the connecting buckles are detachably connected to the buckles adjacent to them.

[0054] Specifically, such as Figure 2 As shown, once the size of the support space is adjusted, medical staff can select different specifications of restraint straps 6 to bind the patient's foot according to the thickness of the patient's foot, and use buckles and fasteners to fix the restraint straps 6 to the sleeve rod 3, so that the patient's foot is relatively fixed to the sleeve rod 3. With the support of the placement pad 7, the risk of the patient's foot shaking significantly during the operation is effectively reduced, ensuring the stability of the operation.

[0055] like Figure 1 and Figure 2 As shown, a mounting plate is detachably snapped onto the side wall of the base 1, and a transparent observation plate 2 is fixedly connected to the top of the mounting plate. The side walls of the support plate 5 abut against the side walls of the observation plate 2.

[0056] Specifically, such as Figure 2 As shown, after the patient's foot is fixed, the mounting plate is snapped onto the side wall of the base 1, so that the side wall of the support plate 5 abuts against the side wall of the observation plate 2, thus creating a foot observation window that is both relatively closed and easy to observe. This prevents the surgical drape from compressing the patient's foot, while allowing medical staff to quickly observe whether there are any abnormalities in the patient's foot.

[0057] In this implementation, the horizontal sliding of the adjusting block 10 synchronously drives the sliding rod 4 to slide vertically, thereby quickly and synchronously adjusting the support height and support spacing of the support space. This allows the support space to dynamically adapt to changes in foot size, thereby achieving a better isolation effect, reducing the risk of pressure sores, and at the same time reducing the occupation of the surgical space, making it easier for medical staff to perform surgical operations.

[0058] Example 2:

[0059] Unlike the embodiments described above, as Figure 1 As shown, both the support plate 5 and the constraint band 6 have several ventilation holes.

[0060] Specifically, such as Figure 1 As shown, this embodiment significantly improves air circulation around the patient's feet by creating several ventilation holes in the arc-shaped support plate 5 and restraint straps 6, reducing the risk of complications such as skin maceration and eczema caused by a long-term enclosed environment. Simultaneously, good breathability helps maintain the stability of peripheral circulation in the feet, preventing excessive local temperature or humidity from affecting blood circulation and further reducing the risk of pressure sores.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A surgical foot decompression support device in a V-shape, comprising a V-shaped hospital bed (15), characterized in that, It also includes a base (1), the top of which has a sliding groove, and the bottom wall of the sliding groove is symmetrically and horizontally fitted with an adjustment block (10). The top of the adjustment block (10) is fixedly connected with a sleeve rod (3), and the sleeve rod (3) is vertically fitted with a sliding rod (4). The top of the sliding rod (4) is equipped with a protective component for isolating surgical drapes. The sliding groove is provided with a width adjustment component for driving the adjustment block (10) to slide horizontally in opposite directions along the bottom wall of the sliding groove; Each sleeve (3) is equipped with a height adjustment component for driving the slide rod (4) to slide vertically along the sleeve (3); A support base (8) is fixedly connected to the middle of the sliding groove. The top of the support base (8) is provided with a placement component for flexibly supporting the heel; the sleeve rod (3) is provided with a binding component for fixing the foot. The base (1) has a fixing component at the bottom for fixing the base (1) to the top of the A-frame hospital bed (15).

2. The surgical human-shaped foot decompression support device according to claim 1, characterized in that, The protective assembly includes a support plate (5) fixedly connected to the top of the slide bar (4), and the support plate (5) is arc-shaped.

3. The surgical human-shaped foot decompression support device according to claim 2, characterized in that, The width adjustment assembly includes a controller and a dual-head drive embedded in the support base (8). Threaded rods (9) are fixedly connected to the output shafts on both sides of the dual-head drive, and the threaded rods (9) on both sides rotate in opposite directions. The adjustment blocks (10) are threadedly engaged with their adjacent threaded rods (9). The controller is used to control the operation of the dual-head drive.

4. The surgical human-shaped foot decompression support device according to claim 3, characterized in that, The height adjustment assembly includes a piston rod (13) fixedly connected to the bottom of the slide rod (4), and a piston plate (14) fixedly connected to the bottom of the piston rod (13). The piston plate (14) is vertically slidingly engaged with the inner wall of the sleeve rod (3). The base (1) is provided with a pneumatic assembly for driving the piston plate (14) to slide vertically along the inner wall of the sleeve rod (3).

5. The surgical human-shaped foot decompression support device according to claim 4, characterized in that, The pneumatic assembly includes piston chambers symmetrically opened in the base (1). Each piston chamber has a horizontally sliding air supply plate (12). Each side of the air supply plate (12) is fixedly connected to a bent rod (11). The end of the bent rod (11) away from the air supply plate (12) extends to the outside of the piston chamber. The top of the bent rod (11) is fixedly connected to the bottom of the adjacent adjusting block (10). Each piston chamber is connected to the adjacent sleeve rod (3).

6. The surgical human-shaped foot decompression support device according to claim 5, characterized in that, The placement component includes a placement pad (7) fixedly connected to the top of the support base (8), and the top of the placement pad (7) is arc-shaped.

7. The surgical human-shaped foot decompression support device according to claim 6, characterized in that, The binding components include a ring-shaped constraint band (6), and buckles are fixedly connected to the outer side walls of the sleeve (3). The outer side walls of the constraint band (6) are symmetrically fixedly connected to fasteners, and the fasteners are detachably connected to the buckles adjacent to them.

8. The surgical human-shaped foot decompression support device according to claim 7, characterized in that, The base (1) has a detachable mounting plate on its side wall. A transparent observation plate (2) is fixedly connected to the top of the mounting plate. The side walls of the support plate (5) abut against the side walls of the observation plate (2).

9. The surgical human-shaped foot decompression support device according to claim 8, characterized in that, Both the support plate (5) and the restraint band (6) have several ventilation holes.

10. The surgical human-shaped foot decompression support device according to claim 9, characterized in that, The fixing component includes a conical seat (16) fixedly connected to the bottom of the base (1), and straps (17) are symmetrically fixedly connected to the bottom of the conical seat (16).

Images