American hinge

Abstract

The invention relates to the field of American hinges, and discloses an American hinge which comprises a hinge plate, an inner operation groove is formed in the hinge plate, an inner groove assembly plate is arranged in the inner operation groove, a plurality of hinge cups are arranged in the inner groove assembly plate, and operation holes are formed in the middle positions of the adjacent hinge cups. Connecting springs are arranged in the operation holes, limiting columns are arranged in the connecting springs, the limiting columns are convenient for limiting the position of the second rectangular plate in the connecting springs, so that stable connection between structures is facilitated, then operation and use of the assembly are facilitated, and the operation holes are convenient for carrying the position of the structural assembly. The inner groove assembly plate can conveniently carry the position of the structural assembly, the structural spring is arranged in the hinge cup, the product is opened and closed by means of the jacking force of normal stretching of the spring, and the product has any stay space when being opened during operation.

Description

Technical Field

[0001] The invention belongs to the technical field of American hinges, in particular to an American hinge. Background Art

[0002] American hinges, especially American heavy-duty hinges, are known for their durability and superior design. These hinges are usually made of hardened steel, stainless steel or galvanized materials, which have excellent wear and impact resistance. Due to the hardness and strength of the metal, American hinges can withstand long-term use without easy wear or deformation, ensuring the stability and reliability of the door. American hinges are usually galvanized, sprayed or otherwise treated with anti-corrosion to enhance their performance in humid, marine or chemical environments. This corrosion-resistant feature not only extends the life of the hinge, but also reduces maintenance requirements. When used in marine climates or high humidity areas, hinges are not prone to rust or corrosion, thereby reducing structural damage and replacement frequency caused by corrosion. American hinges also perform well. The sturdy metal structure increases resistance to vandalism, making the door more difficult to pry open or destroy. This design improves the security of the door and protects the building and the property inside from infringement.

[0003] The aesthetics and low maintenance requirements of American hinges are also one of their important advantages. The hinge surface is smooth and neat after fine processing, and it can still maintain a good appearance after long-term use. In addition, the use of corrosion-resistant materials reduces the frequency of cleaning and maintenance, allowing building maintenance personnel to save time and costs in daily work.

[0004] However, in the existing technology level, when the product is running, the spring and parts rub against each other hard, which is easy to damage the parts, resulting in a short opening and closing life of the product, easy to produce noise, and inconvenient to use the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide an American hinge in order to solve the above-mentioned problems of extending the service life of the components, having no abnormal noise and having any staying space.

[0006] The technical solution adopted by the present invention is as follows: an American hinge comprises a hinge plate, an inner working groove is opened inside the hinge plate, an inner groove component plate is arranged inside the inner working groove, a plurality of hinge cups are arranged inside the inner groove component plate, a working hole is arranged in the middle position of adjacent hinge cups, a connecting spring is arranged inside the working hole, a limiting column is arranged inside the connecting spring, the limiting column passes through the other end of the connecting spring and is fixedly connected with a rectangular plate 2, a structural component is arranged inside the working hole, a rectangular plate 1 is arranged adjacent to the structural component, and the structural component is connected to the rectangular plate 1.

[0007] By adopting the above technical scheme, the connection spring arranged inside the component can be normally extended and retracted during use, which solves the hard wear phenomenon of parts and connection springs. When opening the door, it can stop at any time, consume the force of rebound hinge, and increase the life of the product. The connection spring of this structure is inside the hinge cup. During operation, the pressure is generated by the structural part of the connection spring, and the force of the normal extension and retraction of the connection spring is changed to control the opening and closing. When opening and closing the American hinge, pressure is applied to the rectangular plate 2, and then the position of the connection spring is compressed. Then, the structure component and the rectangular plate 1 are set to cooperate with the operation of the structure. The limit column is convenient for limiting the position of the rectangular plate 2 in the connection spring, so as to facilitate the connection between the structures and stabilize them, and then facilitate the operation of the component. The operation hole is convenient for the position of the structural component, which is convenient for the normal operation of the component. The inner groove component plate is convenient for the position of the structural component. The structural spring is inside the hinge cup. The product is opened and closed by the top force of the normal extension and retraction of the spring. There is space for arbitrary stop when the product is opened.

[0008] In a preferred embodiment, a plurality of slots are provided on the side of the inner working groove, a rectangular slot is provided inside the inner groove component plate, a plurality of compression springs are arranged inside the rectangular slot, the other end of the compression spring is fixedly connected with a side clamp plate, the side clamp plate passes through the other end of the inner groove component plate and is clamped in the slot provided on the side of the inner working groove, and the sizes of the slot and the side clamp plate are matched.

[0009] By adopting the above technical solution, during the operation of the component, the staff can conveniently clamp the rectangular plate 1 into the inner working groove set inside the hinge plate by using the side clamp. When working, the staff aligns the rectangular plate 1 with the position of the inner working groove, and then presses the rectangular plate 1 to apply force to the side clamp. Then the side clamp squeezes the position of the compression spring, causing the compression spring to deform, driving the position of the side clamp to move, thereby facilitating the clamping of the side clamp into the clamping groove set on the side of the inner working groove. The external bevel design of the side clamp makes it easy to limit the position of the side clamp after installation, ensuring that the position of the side clamp is stable. When it is necessary to disassemble and remove the rectangular plate 1, the staff presses the side clamp, and the deformation of the compression spring drives the displacement of the side clamp, so that the rectangular plate 1 can be easily removed, which is convenient for subsequent operation.

[0010] In a preferred embodiment, the hinge plate is made of hard and corrosion-resistant metal.

[0011] By adopting the above technical solutions, the hard metal material can withstand long-term friction and use, extending the service life of the hinge. The metal material with high hardness can resist external impact and is not easily deformed or damaged. The corrosion-resistant metal can effectively resist the influence of moisture, chemicals and other corrosive environments.

[0012] In a preferred embodiment, a rotating shaft ring plate is provided inside the inner working groove adjacent to the inner groove component plate, and a plurality of extrusion arc plates are fixedly connected to the side of the rotating shaft ring plate, and the extrusion arc plates are against the position of rectangular plate two.

[0013] By adopting the above technical solution, the rotating shaft ring plate is convenient for carrying the position of the extrusion arc plate, and the extrusion arc plate is convenient for extruding the position of the rectangular plate 2 during the operation of the American hinge, thereby ensuring the normal operation of the component.

[0014] In a preferred embodiment, a connecting shaft is provided inside the rotating shaft ring plate, and a plurality of through holes are provided inside the inner working groove at positions adjacent to the clamping groove, and both ends of the connecting shaft are clamped in the through holes.

[0015] By adopting the above technical solution, the connecting shaft is connected through the rotating shaft ring plate, which facilitates the connection between the American hinge components and the rotation operation of the rotating shaft ring plate in the inner working groove, thereby ensuring the operation and use of the components.

[0016] In a preferred embodiment, an arc-shaped connecting plate is fixedly connected to the upper end of the rotating shaft ring plate, and a connecting clamping plate is fixedly connected to the upper end of the arc-shaped connecting plate.

[0017] By adopting the above technical solution, the arc-shaped connecting plate is convenient for connecting the positions of the connecting card plate and the rotating shaft ring plate, and is convenient for connecting other components of the structure. The connecting card plate is conveniently clamped in the clamping plate, thereby connecting the upper component plate.

[0018] In a preferred embodiment, the connecting card plate is clamped inside the clamping plate, and a rectangular side plate is fixedly connected to the side surface of the clamping plate.

[0019] By adopting the above technical solution, the snap-in plate is convenient for snapping and connecting the snap-in plates, thereby facilitating the disassembly and assembly of the structural components. The rectangular side plate is convenient for positioning the snap-in plate, ensuring a stable connection of the components.

[0020] In a preferred embodiment, the connecting clamp is threadedly connected with a fixing bolt 1, and the other end of the fixing bolt 1 passes through the threaded hole provided on the side of the rectangular side plate that is threadedly connected to the connecting clamp.

[0021] By adopting the above technical solution, the fixing bolt is convenient for fixing the position of the connecting clamp plate on the upper end of the rectangular side plate, fixing the position of the connecting clamp plate, and facilitating subsequent operations.

[0022] In a preferred embodiment, an upper component plate is fixedly connected to the side surface of the rectangular side plate, and a plurality of components including a middle component plate and a lower component plate are arranged at the lower end of the upper component plate.

[0023] By adopting the above technical solution, the upper component plate is conveniently connected to the position of the rectangular side plate, and the upper component plate and the hinge plate are conveniently connected through the connecting card plate, so that the equipment components are interconnected, and the lower component plate and the middle component plate are conveniently connected to the position of the upper component plate.

[0024] In a preferred embodiment, the upper component plate, the middle component plate and the lower component plate are fixedly connected to each other by threaded connection with a plurality of fixing bolts 2, and a plurality of upper connecting plates are provided at the upper end of the hinge plate.

[0025] By adopting the above technical solution, the connection between the upper component plate, the middle component plate and the lower component plate is facilitated by using the second fixing bolt, thereby ensuring the stable connection of the components. The upper connecting plate is convenient for connecting other components, thereby ensuring the normal operation of the equipment.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] In the present invention, during use, the connecting spring arranged inside the component is normally extended and retracted, which solves the problem of hard wear between parts and connecting springs. When opening the door, it can stop at will, consume the force of rebound hinge, and increase the life of the product. The connecting spring of this structure is inside the hinge cup. During operation, the structural part with the connecting spring is used to generate pressure, and the force of the connecting spring is changed to control the opening and closing in the normal extension and retraction mode. When opening and closing the American hinge, pressure is applied to the rectangular plate 2, and then the position of the connecting spring is compressed. Then, the structural component and the rectangular plate 1 are arranged to cooperate with the operation of the structure. The limit column is convenient for limiting the position of the rectangular plate 2 in the connecting spring, so as to facilitate the connection between the structures to be stable, and then facilitate the operation of the component. The operation hole is convenient for mounting the position of the structural component, and is convenient for the normal operation and use of the component. The inner groove component plate is convenient for mounting the position of the structural component. The structural spring is inside the hinge cup. The product operation relies on the top force of the normal expansion and contraction of the spring to make the product open and close. There is space for the product to stay when it is opened. In the operation and use of the component, the staff conveniently clamps the rectangular plate 1 in the inner operation groove set inside the hinge plate by using the side card plate. When working, the staff aligns the rectangular plate 1 with the position of the inner operation groove, and then presses the rectangular plate 1 to give the side card plate force. Then the side card plate squeezes the position of the compression spring, causing the compression spring to deform, driving the position of the side card plate to move, so as to facilitate the side card plate to be clamped in the card slot set on the side of the inner operation groove. The external bevel design of the side card plate is convenient to limit the position of the side card plate after installation, ensuring that the position of the side card plate is stable. When it is necessary to disassemble and remove the rectangular plate 1, the staff presses the side card plate, and the deformation of the compression spring drives the displacement of the side card plate, so that the rectangular plate 1 can be easily removed, which is convenient for subsequent operation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the American hinge structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the interior of the Chinese-American hinge structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the hinge plate in the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the inner tank component plate in the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the arc-shaped connecting plate in the present invention;

[0033] Figure 6 This is an exploded view of the Chinese-American hinge assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the connection of the compression spring structure in the present invention.

[0035] Markings in the figure: 1. Hinge plate; 2. Upper connecting plate; 3. Inner groove component plate; 4. Rectangular plate one; 5. Extruded arc plate; 6. Connecting shaft; 7. Arc connecting plate; 8. Fixing bolt one; 9. Clamping plate; 10. Lower component plate; 11. Fixing bolt two; 12. Upper component plate; 13. Connecting clamping plate; 14. Limiting column; 15. Structural component; 16. Connecting spring; 17. Rectangular plate two; 18. Inner working groove; 19. Side clamping plate; 20. Hinge cup; 21. Working hole; 22. Rotating shaft ring plate; 23. Compression spring; 24. Rectangular side plate; 25. Middle component plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] Reference Figure 1-3An American hinge comprises a hinge plate 1, wherein an inner working groove 18 is provided inside the hinge plate 1, an inner groove component plate 3 is arranged inside the inner working groove 18, a plurality of hinge cups 20 are arranged inside the inner groove component plate 3, a working hole 21 is arranged in the middle of adjacent hinge cups 20, a connecting spring 16 is arranged inside the working hole 21, a limiting column 14 is arranged inside the connecting spring 16, a rectangular plate 2 17 is fixedly connected to the limiting column 14 passing through the other end of the connecting spring 16, a structural component 15 is arranged inside the working hole 21, a rectangular plate 1 4 is arranged adjacent to the structural component 15, the structural component 15 is connected to the rectangular plate 1 4, and the connecting spring 16 arranged inside the component can be normally extended and retracted during use, thereby solving the hard wear phenomenon of parts and the connecting spring 16, allowing the door to stop at will when opening, consuming the force of the rebound hinge, and increasing the product life. The structural connecting spring 16 is inside the hinge cup 20. During operation, pressure is generated by the structural parts connected to the connecting spring 16, and the force of the normal expansion and contraction of the connecting spring 16 is changed to control the opening and closing. In use, when opening and closing the American hinge, pressure is applied to the rectangular plate 2 17, and then the position of the connecting spring 16 is compressed. Then, the structural component 15 and the rectangular plate 1 4 are set to cooperate with the operation of the structure. The limit column 14 is convenient for limiting the position of the rectangular plate 2 17 in the connecting spring 16, so as to facilitate the stable connection between the structures and facilitate the operation of the components. The operation hole 21 is convenient for the position of the structural component 15, which is convenient for the normal operation of the component. The inner groove component plate 3 is convenient for the position of the structural component. The structural spring is inside the hinge cup. The product operation relies on the top force of the normal expansion and contraction of the spring to open and close the product. There is space for the product to stay when it is open.

[0039] Reference Figure 1-4 , Figure 7The side of the inner working groove 18 is provided with a plurality of slots, and the interior of the inner groove component plate 3 is provided with a rectangular groove, and a plurality of compression springs 23 are arranged inside the rectangular groove, and the other end of the compression spring 23 is fixedly connected with a side clamping plate 19, and the side clamping plate 19 passes through the other end of the inner groove component plate 3 and is clamped in the slot opened on the side of the inner working groove 18, and the sizes of the slot and the side clamping plate 19 are adapted. During the operation and use of the component, the staff can conveniently clamp the rectangular plate 4 in the inner working groove 18 set inside the hinge plate 1 by using the side clamping plate 19. When working, the staff aligns the rectangular plate 4 with the position of the inner working groove 18, and then presses the rectangular plate 4 to apply force to the side clamping plate 19, and then the side clamping plate 19 squeezes the position of the compression spring 23, so that the compression spring 23 is deformed, driving the position of the side clamping plate 19 to move, thereby facilitating the clamping of the side clamping plate 19 in the slot set on the side of the inner working groove 18. The beveled edge design on the outside of the side clamp 19 facilitates limiting the position of the side clamp 19 after installation, ensuring that the position of the side clamp 19 is stable. When it is necessary to disassemble and remove the rectangular plate 4, the staff presses the side clamp 19, and the deformation of the compression spring 23 drives the displacement of the side clamp 19, so that the rectangular plate 4 can be easily removed, which is convenient for subsequent operations.

[0040] Reference Figure 1-3 The hinge plate 1 is made of hard and corrosion-resistant metal. The hard metal material can withstand long-term friction and use, extending the service life of the hinge. The metal material with high hardness can resist external impact and is not easy to deform or damage. The corrosion-resistant metal can effectively resist the influence of moisture, chemicals and other corrosive environments.

[0041] Reference Figure 1-2 A rotating shaft ring plate 22 is arranged inside the inner working groove 18 and adjacent to the inner groove component plate 3. A plurality of extrusion arc plates 5 are fixedly connected to the side of the rotating shaft ring plate 22. The extrusion arc plates 5 are against the position of the rectangular plate 17. The rotating shaft ring plate 22 is convenient for carrying the extrusion arc plates 5. The extrusion arc plates 5 are convenient for extruding the position of the rectangular plate 17 when the American hinge is operating, thereby ensuring the normal operation of the component.

[0042] Reference Figure 1-3 A connecting shaft 6 is arranged inside the rotating shaft ring plate 22, and a plurality of through holes are arranged inside the inner working groove 18 at adjacent positions of the card slot. Both ends of the connecting shaft 6 are clamped in the through holes, and the connecting shaft 6 is connected through the rotating shaft ring plate 22, so as to ensure the connection between the American hinge components and facilitate the rotation operation of the rotating shaft ring plate 22 in the inner working groove 18, thereby ensuring the operation and use of the components.

[0043] Reference Figure 1-2 , Figure 6The upper end of the rotating shaft ring plate 22 is fixedly connected with an arc-shaped connecting plate 7, and the upper end of the arc-shaped connecting plate 7 is fixedly connected with a connecting clamping plate 13. The arc-shaped connecting plate 7 is convenient for connecting the connecting clamping plate 13 and the rotating shaft ring plate 22, so as to facilitate the connection of other components of the structure. The connecting clamping plate 13 is conveniently clamped in the clamping plate 9, thereby connecting the upper component plate 12.

[0044] Reference Figure 1-2 , Figure 6 The connecting card plate 13 is clamped inside the clamping plate 9, and the side of the clamping plate 9 is fixedly connected with a rectangular side plate 24. The clamping plate 9 is convenient for clamping the connecting card plate 13, so as to facilitate the disassembly and assembly of the structural components. The rectangular side plate 24 is convenient for carrying the position of the clamping plate 9 to ensure the stable connection of the components.

[0045] Reference Figure 1-2 , Figure 6 The connecting card plate 13 is threadedly connected with a fixing bolt 8, and the other end of the fixing bolt 8 passes through the connecting card plate 13 and is threadedly connected to the threaded hole set on the side of the rectangular side plate 24. The fixing bolt 8 is convenient for fixing the position of the connecting card plate 13 at the upper end of the rectangular side plate 24, fixing the position of the connecting card plate 13, and facilitating subsequent operations.

[0046] Reference Figure 1-2 , Figure 6 The upper component plate 12 is fixedly connected to the side of the rectangular side panel 24, and multiple components including a middle component plate 25 and a lower component plate 10 are arranged at the lower end of the upper component plate 12. The upper component plate 12 is convenient for connecting the position of the rectangular side panel 24. The upper component plate 12 and the hinge plate 1 are conveniently connected through the connecting card plate 13, so that the equipment components are interconnected, and the lower component plate 10 and the middle component plate 25 are convenient for connecting the position of the upper component plate 12.

[0047] Reference Figure 1-2 , Figure 6 The upper component plate 12, the middle component plate 25 and the lower component plate 10 are fixedly connected to each other by threaded connection with multiple fixing bolts 11. Multiple upper connecting plates 2 are arranged on the upper end of the hinge plate 1. The connection between the upper component plate 12, the middle component plate 25 and the lower component plate 10 is facilitated by using the fixing bolts 11, thereby ensuring the stable connection of the components. The upper connecting plate 2 is convenient for connecting other components, thereby ensuring the normal operation and use of the equipment.

[0048] The implementation principle of an American hinge embodiment of the present invention is:

[0049] During use, the connecting spring 16 arranged inside the component is normally extended and retracted to solve the hard wear phenomenon of parts and the connecting spring 16. When opening the door, it can stay at any time, consume the force of the rebound hinge, and increase the life of the product. The connecting spring 16 of this structure is inside the hinge cup 20. During operation, the structural parts of the connecting spring 16 are used to generate pressure, and the normal extension and retraction of the connecting spring 16 is changed to control the opening and closing. In use, when opening and closing the American hinge, pressure is applied to the rectangular plate 2 17, and then the position of the connecting spring 16 is compressed. Then, the structural component 15 and the rectangular plate 1 4 are set to cooperate with the operation of the structure. The limit column 14 is convenient for limiting the position of the rectangular plate 2 17 in the connecting spring 16, so as to facilitate the connection between the structures and then facilitate the operation of the component. The operation hole 21 is convenient for the position of the mounting structure component 15, which is convenient for the normal operation of the component. The inner groove component plate 3 is convenient for the position of the mounting structure component. The structural spring is inside the hinge cup. The product operation relies on the top force of the normal extension and retraction of the spring to open and close the product. There is space for arbitrary stay when the product is opened.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An American hinge, comprising a hinge plate (1), characterized in that: An inner working groove (18) is provided inside the hinge plate (1), an inner groove component plate (3) is arranged inside the inner working groove (18), a plurality of hinge cups (20) are arranged inside the inner groove component plate (3), a working hole (21) is arranged in the middle of adjacent hinge cups (20), a connecting spring (16) is arranged inside the working hole (21), a limiting column (14) is arranged inside the connecting spring (16), the limiting column (14) passes through the other end of the connecting spring (16) and is fixedly connected with a rectangular plate 2 (17), a structural component (15) is arranged inside the working hole (21), a rectangular plate 1 (4) is arranged adjacent to the structural component (15), and the structural component (15) is connected to the rectangular plate 1 (4).

2. An American hinge according to claim 1, characterized in that: The side of the inner working groove (18) is provided with a plurality of slots, the interior of the inner groove component plate (3) is provided with a rectangular groove, the interior of the rectangular groove is provided with a plurality of compression springs (23), the other end of the compression spring (23) is fixedly connected with a side clamping plate (19), the side clamping plate (19) passes through the other end of the inner groove component plate (3) and is clamped in the slot provided on the side of the inner working groove (18), and the sizes of the slot and the side clamping plate (19) are adapted to each other.

3. An American hinge according to claim 1, characterized in that: The hinge plate (1) is made of hard and corrosion-resistant metal.

4. An American hinge according to claim 1, characterized in that: A rotating shaft ring plate (22) is provided inside the inner working groove (18) at a position adjacent to the inner groove component plate (3), and a plurality of extrusion arc plates (5) are fixedly connected to the side of the rotating shaft ring plate (22), and the extrusion arc plates (5) are against the position of the second rectangular plate (17).

5. An American hinge as claimed in claim 4, characterized in that: A connecting shaft (6) is arranged inside the rotating shaft ring plate (22), and a plurality of through holes are arranged inside the inner working groove (18) at positions adjacent to the clamping groove, and both ends of the connecting shaft (6) are clamped in the through holes.

6. An American hinge as claimed in claim 4, characterized in that: The upper end of the rotating shaft ring plate (22) is fixedly connected to an arc-shaped connecting plate (7), and the upper end of the arc-shaped connecting plate (7) is fixedly connected to a connecting clamping plate (13).

7. An American hinge according to claim 6, characterized in that: The connecting card plate (13) is clamped inside the clamping plate (9), and a rectangular side plate (24) is fixedly connected to the side surface of the clamping plate (9).

8. An American hinge according to claim 6, characterized in that: The connecting clamp (13) is threadedly connected with a fixing bolt (8), and the other end of the fixing bolt (8) passes through the connecting clamp (13) and is threadedly connected to a threaded hole provided on the side of the rectangular side plate (24).

9. An American hinge according to claim 7, characterized in that: An upper component plate (12) is fixedly connected to the side surface of the rectangular side plate (24), and a plurality of components including a middle component plate (25) and a lower component plate (10) are arranged at the lower end of the upper component plate (12).

10. An American hinge according to claim 9, characterized in that: The upper component plate (12), the middle component plate (25) and the lower component plate (10) are fixedly connected to each other by threaded connection with a plurality of fixing bolts (11), and a plurality of upper connecting plates (2) are arranged at the upper end of the hinge plate (1).

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