Structure for flatly winding net body

Abstract

The invention discloses a structure for flatly winding a net body, which comprises the net body and a winding mechanism, the net body comprises a latticed net surface, and the upper end and the lower end of the net surface are respectively provided with a first edge closing strip and a second edge closing strip which are made of fiber cloth. And a hard bulge I and a hard bulge II are respectively arranged on the edge closing strip I and the edge closing strip II. When the badminton net is used, the traction part is held to take out the net body, the net body can be taken out like a straight line due to the fact that the moving positions of the protrusions at the upper end and the lower end of the net body are limited by the upper positioning roller set and the lower positioning roller set which are arranged on the upper cover and the lower cover, and the situation that the badminton net is inclined and curled can be avoided; the movable positions of the protrusions are limited by the upper positioning roller set and the lower positioning roller set, so that the net body can be rolled on the reel like a straight line, and the net body is prevented from being separated from the upper positioning roller set and the lower positioning roller set in cooperation with a cylindrical body at the front end of the net body.

Description

Technical Field

[0001] The present invention relates to the technical field of ball net winding devices, and specifically to a structure for flatly winding a net body. Background Art

[0002] Sports such as tennis and badminton require balls, rackets, and also a ball net to separate both sides of the court area. In the existing form, users need to prepare a ball net, and after the net body is unfolded, it is respectively sleeved or fixed to the ball racks at both ends through ropes; however, the disadvantages of the above structure are as follows: 1. There are many meshes formed in the ball net and the net body, and the ball net and the net body itself are soft structures, so sometimes the ball net and the net body are prone to entanglement and knotting, and it takes time to tidy up. 2. Each time it is used, the ball net and the net body need to be unfolded, which takes time in use.

[0006] Therefore, some manufacturers have developed a structure such as that disclosed in Chinese Patent Publication No. CN217187773U. The first pillar is hollow inside and has an opening on the side; a rotating rod is rotatably installed inside the first pillar, one end of the ball net is first fixed to the rotating rod, and the rotating rod rotates to wind or unwind the ball net at the opening of the first pillar; a base is fixed to the bottom of the first pillar; the rotating rod is driven to rotate by a driving rotation assembly located at the bottom of the rotating rod and installed on the base. When it is necessary to rotate the rotating rod to wind or unwind the ball net, the rotating rod is driven to rotate inside the first pillar by a driving rotating element, so as to realize the winding or unwinding of the ball net at the opening of the first pillar.

[0007] However, the disadvantages of the above structure are as follows:

[0008] 1. Since the ball net is fixed to the first pillar, there is relatively little support force at the upper and lower ends of the ball net. Therefore, the ball net will show a skewed and curled situation.

[0009] 2. When the ball net needs to be wound up, the ball net will sag due to the action of gravity. Without the assistance of others, the ball net will knot during winding, or even be unable to be wound up. Summary of the Invention

[0010] The purpose of the present invention is to provide a structure for flatly winding a net body to solve the problems raised in the above background art.

[0011] To achieve the above object, the present invention provides the following technical solution: A structure for flattening and winding a net body, comprising a net body and a winding mechanism. The net body includes a grid-shaped net surface. At the upper and lower ends of the net surface, a first edge strip and a second edge strip made of fiber cloth are respectively provided. A first hard protrusion and a second hard protrusion are respectively provided on the first edge strip and the second edge strip. One side of the net body is combined with the winding mechanism and is driven by the winding mechanism to unfold or wind the net body. On the side of the net body opposite to the combined winding mechanism, a straight traction part is provided, and a columnar body is provided on the traction part;

[0012] The winding mechanism includes a winding shaft, an upper cover, a lower cover and a connecting rod. The winding shaft includes an inner shaft rod. The shaft rod is pivotally connected to the upper cover and the lower cover, so that the inner shaft rod can rotate between the upper cover and the lower cover. An outer cylinder for winding and fixing the net body is provided on the outer side of the inner shaft rod. The outer cylinder is pivotally connected to the inner shaft rod, so that the outer cylinder can rotate together with the inner shaft rod. The upper cover is arranged at the upper end of the winding shaft. An upper shaft connection part, an upper roller positioning part and an upper connection cylinder part are arranged on the inner side of the upper cover;

[0013] The upper shaft connection part provides the pivotal connection of the inner shaft rod of the winding shaft. The upper roller positioning part is provided with an upper positioning roller group. The upper positioning roller group includes two groups of upper positioning rollers. The first edge strip at the upper end of the net body passes through the upper positioning roller group. An upper limit part for restricting the first protrusion at the upper end of the net body is formed between the two upper positioning rollers, and the width of the upper limit part is slightly larger than that of the protrusion, so that the protrusion can move within the upper limit part without detaching. And the upper cover is provided with an upper opening at the front end of the upper roller positioning part. When the net body is wound, the columnar body of the traction part can just stop at the front end of the upper positioning roller group;

[0014] The upper connection cylinder part provides the axial setting of the connecting rod. The lower cover is arranged at the lower end of the winding shaft. A lower shaft connection part, a lower roller positioning part and a lower connection cylinder part are arranged on the inner side of the lower cover. The lower shaft connection part provides the pivotal connection of the lower end of the inner shaft rod of the winding shaft. The lower roller positioning part is provided with a lower positioning roller group. The lower positioning roller group includes two groups of lower positioning rollers. The second edge strip at the lower end of the net body passes through the lower positioning roller group. A lower limit part for restricting the second protrusion at the lower end of the net body is formed between the two lower positioning rollers, and the width of the lower limit part is slightly larger than that of the protrusion, so that the protrusion can move within the lower limit part without detaching. And the lower cover is provided with a lower opening at the front end of the lower roller positioning part;

[0015] The lower connection cylinder part provides the axial setting of the connecting rod. By respectively passing the first protrusion and the second protrusion at the upper and lower ends of the net body through the upper limit part of the upper positioning roller group and the lower limit part of the lower positioning roller group, the net body is restricted by the upper limit part and the lower limit part, and can be unfolded flat or wound flat on the winding shaft.

[0016] The protrusion one and the protrusion two are nylon ropes.

[0017] An upper connecting ring part and a lower connecting ring part are respectively arranged on the upper cover and the lower cover, and the upper connecting ring part and the lower connecting ring part can provide a rope body to pass through and be sleeved.

[0018] The lower cover is provided with a through hole in the lower connecting cylinder part, and the connecting rod is a telescopic rod, and the through hole provides a fixing rod to penetrate into.

[0019] Both the first edging strip and the second edging strip are respectively folded back to form a folded edge, and the two folded edges are joined to wrap the protrusion one and the protrusion two respectively by the first edging strip and the second edging strip, so as to fix the protrusion and prevent it from falling off.

[0020] Both the first edging strip and the second edging strip are made of fiber cloth, and then the edge of the net surface is wrapped, and the first edging strip, the second edging strip, the net surface, the protrusion one and the protrusion two are formed together by a sewing and molding method.

[0021] A torsion spring is sleeved on the inner shaft rod. One side of the torsion spring is embedded in an inner card slot opened on the inner shaft rod, and the torsion spring is provided with a predetermined length. The other side of the torsion spring is provided with a joint end, and the joint end is fixed in an outer card slot opened on the outer cylinder. By using the elasticity of the torsion spring, when the net body is unfolded, the torsion spring releases its length, so that the net body can be unfolded; when the net body is wound up, the torsion spring elastically releases, so that the net body automatically winds up.

[0022] A rotating handwheel is further arranged on the outer side of the upper cover, and the rotating handwheel is connected with the upper shaft connecting part of the reel. Driven by the rotating handwheel, the net body can be unfolded, or the user can rotate the rotating handwheel by hand to wind up the net body on the reel.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. When in use, hold the traction part to take out the net body. Due to the protrusions at the upper and lower ends of the net body being restricted in their moving positions by the upper positioning roller group and the lower positioning roller group arranged on the upper cover and the lower cover, the net body can be taken out in a straight line, and the situations of the ball net being skewed and curled can be avoided.

[0025] 2. When the net body needs to be stored, by using the above-mentioned protrusions being restricted in their moving positions by the upper positioning roller group and the lower positioning roller group, the net body can be wound up on the reel in a straight line, and cooperating with the columnar body at the front end of the net body, the net body can be prevented from detaching from the upper positioning roller group and the lower positioning roller group, and problems such as knotting caused by uneven storage of the net body can be avoided. Brief Description of the Drawings

[0026] Figure 1 It is a three-dimensional structure diagram of the present invention;

[0027] Figure 2 This is the structural diagram of the net body of the present invention;

[0028] Figure 3 This is the structural diagram of the winding mechanism of the present invention;

[0029] Figure 4 This is the exploded schematic diagram of the structure of the present invention;

[0030] Figure 5 This is the structural diagram of the upper cover of the present invention;

[0031] Figure 6 This is the structural diagram of the lower cover of the present invention;

[0032] Figure 7 This is the schematic diagram (1) when the present invention is in use;

[0033] Figure 8 This is the schematic diagram (2) when the present invention is in use.

[0034] In the figure: 10, net body; 11, net surface; 12, edge-receiving strip 1; 13, edge-receiving strip 2; 121, protrusion 1; 131, protrusion 2; 14, traction part; 141, columnar body; 100, winding mechanism; 20, reel; 21, inner shaft rod; 211, inner card slot; 22, outer cylinder; 221, outer card slot; 30, upper cover; 301, upper opening; 31, upper shaft connection part; 32, upper roller positioning part; 33, upper connection cylinder part; 34, upper positioning roller group; 341, upper positioning roller; 342, upper limiting part; 35, upper connection ring part; 40, lower cover; 41, lower shaft connection part; 401, lower opening; 42, lower roller positioning part; 43, lower connection cylinder part; 431, through hole; 44, lower positioning roller group; 441, lower positioning roller; 442, lower limiting part; 45, lower connection ring part; 50, connecting rod; 60, torsion spring; 70, fixed frame rod; H, rope body. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figure 1-8 , the present invention provides a technical solution: As Figures 1 to 4 shown, the structure of the present invention is composed of a net body 10 and a winding mechanism 100.

[0037] AsFigure 1 , Figure 2 As shown in Figure 2 , the net body 10 has a net surface 11 in a grid shape. At the upper and lower ends of the net surface 11, a first edge strip 12 and a second edge strip 13 made of fiber cloth are respectively provided, and a hard protrusion 121 and a protrusion 131 are provided on each of the first edge strip 12 and the second edge strip 13. The aforementioned protrusions can be selected as strip-shaped objects made of nylon rope, which are hard but flexible.

[0038] As Figure 1 shown in Figure 1 , one side of the net body 10 is combined with the winding mechanism 100, and the net body 10 is unfolded or wound under the drive of the winding mechanism 100.

[0039] As Figure 1 , Figure 2 shown in Figure 2 , a straight traction part 14 is provided on the side of the net body 10 opposite to the side combined with the winding mechanism 100, and a columnar body 141 is provided on the traction part 14. By holding the columnar body 141 of the traction part 14, the net body 10 can be smoothly drawn out or wound.

[0040] It is worth mentioning that the first edge strip 12 and the second edge strip 13 are folded back to form a folded edge (not shown in the figure), the folded edge is joined to the first edge strip 12 and the second edge strip 13, and the protrusion 121 and the protrusion 131 are covered. Accordingly, the protrusion 121 and the protrusion 131 are fixed to prevent falling off.

[0041] In addition to fixing the protrusion 121 and the protrusion 131 on the first edge strip 12 and the second edge strip 13 in the form of a folded edge, in some embodiments, each of the first edge strip 12 and the second edge strip 13 can be further formed by injection molding with fiber cloth covering, and then the edge of the net surface 11 is covered, and then the protrusion 121 and the protrusion 131 are assembled into the first edge strip 12 and the second edge strip 13.

[0042] In addition, each of the first edge strip 12 and the second edge strip 13 adopts the technology of sewing together by a sewing machine, and then the edge of the net surface 11 is covered, and the net surface 11, the first edge strip 12, the second edge strip 13, the protrusion 121 and the protrusion 131 can be formed together by sewing together by a sewing machine.

[0043] As Figure 1 , Figure 2 shown in Figure 1 , one side of the net body 10 is combined with the winding mechanism 100, and the net body 10 is unfolded or wound under the drive of the winding mechanism 100.

[0044] As Figure 1 , Figure 3 , Figure 4As shown, the winding and unwinding mechanism 100 is composed of a winding shaft 20, an upper cover 30, a lower cover 40, and a connecting rod 50.

[0045] As Figure 3 , Figure 4 shown, the aforementioned winding shaft 20 includes an inner shaft rod 21 and an outer cylinder 22. The inner shaft rod 21 is pivotally connected to the upper cover 30 and the lower cover 40, so that the inner shaft rod 21 can rotate between the upper cover 30 and the lower cover 40.

[0046] As Figure 3 , Figure 4 shown, the outer cylinder 22 is disposed outside the inner shaft rod 21, and the outer cylinder 22 is pivotally connected to the aforementioned inner shaft rod 21, so that the outer cylinder 22 can rotate together with the inner shaft rod 21.

[0047] As Figure 3 , Figure 4 shown, in the main embodiment of this case, the winding shaft 20 adopts a spring winding mechanism to achieve the function of automatic winding. Please continue to refer to Figure 3 , Figure 4 . A torsion spring 60 is provided on the inner shaft rod 21. The inner shaft rod 21 is provided with an inner card slot 211 on the rod body. One side of the aforementioned torsion spring 60 is embedded in the inner card slot 211 for fixation, and the other side of the torsion spring 60 is embedded in an outer card slot 221 of the outer cylinder 22; by pulling the net body 10 provided on the winding shaft 20, the outer cylinder 22 is rotated to achieve the purpose of unfolding the net body 10; when the net body 10 is released, the torsion spring elastically releases, thereby driving the outer cylinder 22 to retract, and obtaining the effect that the net body 10 is wound on the winding shaft 20.

[0048] The above implementation method uses the torsion spring 60 for automatic winding. In addition, a rotating handwheel (not shown in the figure) can be further provided outside the upper cover 30, and the aforementioned rotating handwheel is connected to the upper shaft connecting member of the winding shaft 20. Driven by the rotating handwheel, the net body 10 can be unfolded, or the user can manually rotate the rotating handwheel to wind the net body 10 on the winding shaft 20.

[0049] As Figure 1 , Figure 3 , Figure 4 , Figure 5 shown, the upper cover 30 is disposed at the upper end of the winding shaft 20. The upper cover 30 is provided with an upper shaft connecting portion 31, an upper roller positioning portion 32, and an upper connecting cylinder portion 33 on the inner side.

[0050] As Figure 1 , Figure 3 , Figure 4 , Figure 5 shown, the upper shaft connecting portion 31 provides pivotal connection for the inner shaft rod 21 of the winding shaft 20.

[0051] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 shown, the upper roller positioning portion 32 is provided with an upper positioning roller group 34.

[0052] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 shown, the aforementioned upper positioning roller group 34 includes two groups of upper positioning rollers 341, and the edge strip 12 at the upper end of the mesh body 10 penetrates into the upper positioning roller group 34; a upper limit portion 342 for restricting the protrusion 121 at the upper end of the mesh body 10 is formed between the two upper positioning rollers 341, and the width of the upper limit portion 342 is slightly larger than that of the protrusion 121, so that the protrusion 121 can move within the upper limit portion 342 without detaching, and the upper cover 30 is provided with an upper opening 301 at the front end of the upper roller positioning portion 32. In addition, when the mesh body 10 is wound up, the columnar body 141 of the traction portion 14 can just stop at the front end of the upper positioning roller group 34.

[0053] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 shown, the upper connecting cylinder portion 33 provides shaft setting for the connecting rod 50.

[0054] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 shown, the lower cover 40 is arranged at the lower end of the reel 20, and the lower cover 40 is provided with a lower shaft connecting portion 41, a lower roller positioning portion 42 and a lower connecting cylinder portion 43 on the inner side.

[0055] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 shown, the lower shaft connecting portion 41 provides lower end shaft connection for the inner shaft rod 21 of the reel 20.

[0056] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 shown, the lower roller positioning portion 42 is provided with a lower positioning roller group 44.

[0057] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 6As shown, the aforementioned lower positioning roller group 44 includes two groups of lower positioning rollers 441, and the second edge strip 13 at the lower end of the net body 10 passes through the lower positioning roller group 44; a lower limiting portion 442 for restricting the protrusion 131 at the lower end of the net body 10 is formed between the two lower positioning rollers 441, and the width of the lower limiting portion 442 is slightly larger than that of the protrusion 131, so that the protrusion 131 can move within the lower limiting portion 442 without detaching, and the lower cover 40 is provided with a lower opening 401 at the front end of the lower roller positioning portion 42.

[0058] As Figure 1 , Figure 3 , Figure 4 , Figure 6 shown, the lower connecting cylinder portion 43 provides a shaft setting for the connecting rod 50.

[0059] As Figure 1 , Figure 3 , Figure 5 , Figure 6 shown, by the protrusions 121 and 131 at the upper and lower ends of the net body 10 respectively passing through the upper limiting portion 342 of the aforementioned upper positioning roller group 34 and the lower limiting portion 442 of the lower positioning roller group 44, the net body 10 is restricted by the upper limiting portion 342 and the lower limiting portion 442, and thus can be unfolded flat or wound up flat on the reel 20.

[0060] As Figure 3 , Figure 7 shown, the lower cover 40 is provided with a through hole 431 in the lower connecting cylinder portion 43, and the connecting rod 50 is a telescopic rod, and the connecting rod 50 can be taken out from the through hole 431 to fix the present invention.

[0061] As Figure 8 shown, the upper cover 30 and the lower cover 40 are respectively provided with an upper connecting ring portion 35 and a lower connecting ring portion 45, and the upper connecting ring portion 35 and the lower connecting ring portion 45 can provide a rope H to pass through. Accordingly, when fixing the structure of the present invention, the aforementioned rope H is passed through the upper connecting ring portion 35 and the lower connecting ring portion 45, and then the rope H is fixed on the ground or the fixing rack of the ball, and the present invention can be used stably.

[0062] As Figure 8 shown, according to the technology of the foregoing embodiment, a further implementation method can select that the lower cover 40 is provided with a through hole 431 in the lower connecting cylinder portion 43, and the aforementioned through hole 431 provides a fixing frame rod 70 to pass through.

[0063] In summary, when the present invention is in use, hold the traction part to take out the net body. Due to the protrusions at the upper and lower ends of the net body, the movement positions are restricted by the upper positioning roller group and the lower positioning roller group provided on the upper cover and the lower cover, so that the net body can be taken out in a straight line, and the situation of the tennis net being skewed or curled can be avoided.

[0064] When the net body needs to be stored, utilize the fact that the above-mentioned protrusions are restricted in their movement positions by the upper positioning roller group and the lower positioning roller group, so that the net body can be wound on the reel in a straight line. And in cooperation with the columnar body at the front end of the net body, it can prevent the net body from disengaging from the upper positioning roller group and the lower positioning roller group, and avoid problems such as knotting caused by uneven storage of the net body.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Structure of a flat retractable net body, comprising a net body (10) and a retracting mechanism (100), characterized in that: The net body (10) includes a grid-shaped net surface (11). At the upper and lower ends of the net surface (11), a first edge strip (12) and a second edge strip (13) made of fiber cloth are respectively provided. On the first edge strip (12) and the second edge strip (13), a first hard protrusion (121) and a second hard protrusion (131) are respectively provided. One side of the net body (10) is combined with the retracting mechanism (100), and the net body (10) is driven by the retracting mechanism (100) to unfold or retract. On the side of the net body (10) opposite to the combined retracting mechanism (100), a straight traction part (14) is provided, and a columnar body (141) is provided on the traction part (14); The retracting mechanism (100) includes a reel (20), an upper cover (30), a lower cover (40) and a connecting rod (50). The reel (20) includes an inner shaft rod (21). The shaft rod (21) is pivotally connected to the upper cover (30) and the lower cover (40), so that the inner shaft rod (21) can rotate between the upper cover (30) and the lower cover (40). An outer cylinder (22) for retracting and fixing the net body (10) is provided on the outer side of the inner shaft rod (21). The outer cylinder (22) is pivotally connected to the inner shaft rod (21), so that the outer cylinder (22) can rotate together with the inner shaft rod (21). The upper cover (30) is arranged at the upper end of the reel (20). An upper shaft connection part (31), an upper roller positioning part (32) and an upper connecting cylinder part (33) are provided on the inner side of the upper cover (30); The upper shaft connection part (31) provides pivotal connection for the inner shaft rod (21) of the reel (20). An upper positioning roller group (34) is provided on the upper roller positioning part (32). The upper positioning roller group (34) includes two groups of upper positioning rollers (341). The first edge strip (12) at the upper end of the net body (10) passes through the upper positioning roller group (34). A upper limiting part (342) for limiting the first protrusion (121) at the upper end of the net body (10) is formed between the two upper positioning rollers (341). The width of the upper limiting part (342) is slightly larger than that of the protrusion (121), so that the protrusion (121) can move within the upper limiting part (342) without detachment. And an upper opening (301) is provided at the front end of the upper roller positioning part (32) of the upper cover (30). When the net body (10) is retracted, the columnar body (141) of the traction part (14) can just stop at the front end of the upper positioning roller group (34); The upper connecting cylinder part (33) provides axial setting for the connecting rod (50). The lower cover (40) is arranged at the lower end of the reel (20). The lower cover (40) is provided with a lower shaft connecting part (41), a lower roller positioning part (42), and a lower connecting cylinder part (43) on the inner side. The lower shaft connecting part (41) provides axial connection for the lower end of the inner shaft rod (21) of the reel (20). The lower roller positioning part (42) is provided with a lower positioning roller group (44). The lower positioning roller group (44) includes two lower positioning rollers (441). The second edge strip (13) at the lower end of the net body (10) passes through the lower positioning roller group (44). A lower limiting part (442) for restricting the second protrusion (131) at the lower end of the net body (10) is formed between the two lower positioning rollers (441). And the width of the lower limiting part (442) is slightly larger than that of the protrusion (131), so that the protrusion (131) can move within the lower limiting part (442) without detachment. And the lower cover (40) is provided with a lower opening (401) at the front end of the lower roller positioning part (42). The lower connecting cylinder part (43) provides axial setting for the connecting rod (50). By passing the first protrusion (121) and the second protrusion (131) at the upper and lower ends of the net body (10) through the upper limiting part (342) of the upper positioning roller group (34) and the lower limiting part (442) of the lower positioning roller group (44) respectively, the net body (10) can be flattened and unfolded or flattened and wound around the reel (20) under the restriction of the upper limiting part (342) and the lower limiting part (442).

2. The structure of a flat retractable net body according to claim 1, characterized in that: The first protrusion (121) and the second protrusion (131) are nylon ropes.

3. The structure of a flat coiling net body according to claim 1, characterized in that: Upper connecting ring parts (35) and lower connecting ring parts (45) are respectively arranged on the upper cover (30) and the lower cover (40), and the upper connecting ring part (35) and the lower connecting ring part (45) can provide a rope body (H) to pass through and be sleeved.

4. The structure of a flat coiling net body according to claim 1, wherein: The lower cover (40) is provided with a through hole (431) in the lower connecting cylinder part (43). And the connecting rod (50) is a telescopic rod. The through hole (431) provides a fixing frame rod (70) to pass through.

5. The structure of a flat retractable net body according to claim 1, characterized in that: Both the first edge strip (12) and the second edge strip (13) are respectively folded back to form a folded edge. The two folded edges are joined, and the first edge strip (12) and the second edge strip (13) respectively wrap the first protrusion (121) and the second protrusion (131).

6. The structure of a flat coiling net body according to claim 1, characterized in that: Both the first edge strip (12) and the second edge strip (13) are made of fiber cloth, and then the edges of the net surface (11) are wrapped. The first edge strip (12), the second edge strip (13), the net surface (11), the first protrusion (121) and the second protrusion (131) are formed together by a vehicle molding method.

7. The structure of a flat winding net body according to claim 1, characterized in that: The inner shaft rod (21) is sleeved with a torsion spring (60). One side of the torsion spring (60) is embedded in an inner card slot (211) opened on the inner shaft rod (21). And the torsion spring (60) is set with a predetermined length. The other side of the torsion spring (60) is provided with a joint end, and the joint end is fixed in an outer card slot (221) opened on the outer cylinder (22).

8. The structure of a flat retractable net body according to claim 1, characterized in that: An outer side of the upper cover (30) is further provided with a rotating handwheel, and the rotating handwheel is connected to an upper shaft connecting portion (31) of the reel (20).

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