Patent Application
20240399224
This invention relates to a flat structure for rolling up net body, it specifically relates to a net body having easy expansion or roll-up device installed on roll-up structure, on upper cap and lower cap of roll-up structure, it is installed with roll-up device used to fix net body location, and through the pulling or withdrawing of net body, net body can be taken out or expanded quickly, when net body is to be received, through the reel of roll-up structure and with the assistance of positioning structure, net body can be rolled up and received flatly in reel.
Ball sports is always sports favored by nationals of Taiwan, especially in recent years, some domestic athletes have acquired one after another the world's front-end rankings in tennis and badminton, therefore, in holidays, you can see people are practicing tennis, badminton or even volleyball in stadium or even in parks.
For the above mentioned sports, in addition to the need of ball and racket, a net is also needed to separate the court into two sides; in the present form, users have to prepare ball net, and after net body is expanded, it should be installed respectively or fixed on ball racks at both ends through ropes; however, drawbacks of the above mentioned structure are: 1. Lots of net grids are formed ball net and net body, and because ball net and net body themselves are of soft structures, therefore, they could easily get entangled and tied to each other, and time is needed to arrange them; 2. During every use, ball net and net body need to be expanded, therefore, it is quite time consuming to use it.
Therefore, some companies have developed a structure as shown in the announced China patent CN217187773U, wherein its first support pillar has hollow inside and opening in the side part; a rotational pole, which is installed in rotatable way inside the first support pillar, and a ball net having one end fixed first on the rotating pole so that when the rotational pole is rotating, ball net will be reeled in the opening of the first pillar; a base, which is fixed on the bottom of the first pillar; moreover, rotational pole is driven by driving and rotating component installed on the base and located at the bottom of the rotational pole to rotate. When it is needed to rotate rotational pole to receive or release the ball net, driving and rotating component can drive rotational pole to rotate within first support pillar and to realize the reeling or unreeling of ball net on the opening of first support pillar; however, the drawbacks of the above mentioned structures are as follows: 1. Because the ball net is fixed on a first support pillar, the upper and lower end of the ball net will have weaker supporting force, therefore, ball net will stand obliquely or get curly; 2. When ball net is to be reeled up, ball net will droop due to gravitational force, therefore, without other people's help, ball net will get tied when it is reeled up, or sometimes it will become difficult to be reeled up.
The main purpose of this invention is to provide a flat structure for roll-up of net body, which aims at improving the prior art ball net or roll-up structure for net body; on the upper and lower end of net body, it is installed respectively with one hard and protruding object to roll up net body on one reel; moreover, the above mentioned reel is assembled between one upper cap and one lower cap, moreover, a positioning roller set is set up in the upper and lower cap to limit the movement of the protruding object, therefore, through positioning roller set, the movement scope of net body is limited, consequently, ball net or net body can be expanded or received flatly in reel.
Therefore, the structure of this invention is made up of a net body and a roll-up mechanism;
The net body has a grid-shaped net surface, and upper end and lower end of the net surface is set up respectively with an edge trim made up of canvas, and on the edge trim, it is set up with a hard protruding object;
One side of the net body is associated at the roll-up mechanism and is driven by the roll-up mechanism to expand or receive net body;
The net body, at one side relatively associated with the roll-up mechanism, is set up with a straight traction part, and above the traction part, it is set up with a columnar body, through the holding of the columnar body of the traction part, the net body can be withdrawn or reeled up flatly;
The roll-up mechanism contains a reel, an upper cap, a lower cap and a connecting lever;
The above mentioned reel contains an inner shaft, and the inner shaft is coupled to the upper cap and the lower cap so that the inner shaft can rotate between the upper cap and the lower cap;
Outer side of the inner shaft is set up with outer barrel for roll-up and fixing by the net body, and the outer barrel is coupled to the above mentioned inner shaft so that the outer barrel can rotate together with the inner shaft;
The upper cap is set up at the upper end of the reel, and at the inner side of the upper cap, it is set up with an upper shaft connecting part, an upper roller positioning part and an upper connecting barrel;
The upper connecting shaft can provide coupling for inner shaft of the reel;
The upper roller positioning part is set up with a upper positioning roller set;
The above mentioned upper positioning roller set contains two sets of upper positioning roller, moreover, edge trim at upper side of the net body penetrates into the upper positioning roller set; and between those two upper positioning rollers, an upper position-limiting part for limiting protruding object on upper end of the net body is formed, and width of the upper position-limiting part is slightly larger than the protruding object so that the protruding object can move within the upper position-limiting part without separating from it, and an upper opening is set up at the upper cap at the front end of the upper roller positioning part, in addition, columnar body of the traction part, when the net body is reeling up, can stop and block at the front end of the upper positioning roller set;
The upper connecting barrel can provide coupling for the connecting lever;
The lower cap is installed at lower end of the reel, and at inner side of the lower cap, it is installed with a lower shaft connecting part, a lower roller positioning part and a lower connecting barrel;
The lower connecting shaft provides coupling for lower end of inner shaft of the reel;
The lower roller positioning part is installed with a lower positioning roller set;
The above mentioned lower positioning roller set contains two sets of lower positioning rollers, and edge trim at lower end of the net body penetrates into the lower positioning roller set; and between those two lower positioning rollers, a lower position-limiting part for limiting protruding object at lower end of the net body is formed, and width of the lower position-limiting part is slightly larger than the protruding object so that the protruding object can move inside the lower position-limiting part without separating from it, and the lower cap is installed with an opening at front end of the lower roller positioning part;
The lower connecting barrel provides coupling for the connecting lever;
Protruding object at upper and lower end of the net body penetrates respectively into upper position-limiting part of the above mentioned upper positioning roller set and lower position-limiting part of the above mentioned lower positioning roller set so that the net body, under limitation by the upper position-limiting part and the lower position-limiting part, can expand flatly or can be reeled up flatly in the reel.
In embodiment of this invention, wherein the protruding object is nylon rope.
In embodiment of this invention, wherein the upper cap and the lower cap is installed respectively with a connecting ring part, and each of the connecting ring part can be penetrated by a rope body. Therefore, when the structure of this invention is to be fixed, the above mentioned rope body is put on each of the connecting ring part, next, rope body is fixed on the ground or fixing rack of the ball game, therefore, this invention can be used stably.
In embodiment of this invention, wherein the lower cap is installed with a penetrating hole at the lower connecting barrel, and the connecting lever is a retractable stick, which can take out the connecting lever from the penetrating hole and fix this invention.
In embodiment of this invention, wherein the lower cap is installed with a penetrating hole at the lower connecting barrel, and the above mentioned penetrating hole can be penetrated by a fixing rack lever;
In embodiment of this invention, wherein the edge trim is folded to form a folding edge, and the folding edge is connected to the edge trim, and then the protruding object is cladded, therefore, protruding object is fixed and is prevented from dropping.
In embodiment of this invention, wherein the edge trim can adopt plastic injection molding to clad the edge of net surface.
In embodiment of this invention, wherein the edge trim has adopted thermos-compression technique so as to clad edge of the net surface, and the above mentioned edge trim, net surface and protruding object can be formed together through thermos-compression method.
In embodiment of this invention, wherein the inner shaft is further installed with a torsion spring, and one side of the torsion spring is embedded into one inner slot of the inner shaft, and the torsion spring is set up with predetermined length, meanwhile, at another side of the torsion spring, it is installed with one joint end, and the joint end is fixed on one outer slot of the outer barrel. Therefore, using elasticity of the torsion spring, when net body is expanded, the torsion spring will release a length so that net body can expand; moreover, when reeling up net body, the torsion spring will release elastically so that net body will make automatic roll-up.
In embodiment of this invention, wherein at outer side of the upper cap, it is further installed with rotational hand wheel, and the above mentioned rotational hand wheel is connected to upper shaft connecting piece of the reel. Through the driving of the rotational hand wheel, the net body can be expanded, or the user can rotate the rotational hand wheel with hand so that the net body can be reeled up on the reel.
Through the above mentioned descriptions, the features of this invention and its available functions are briefly described as follows:
1. When using it, hold the traction part to take out net body, because protruding object at upper and lower end of net body is limited for its movement location by upper positioning roller set and lower positioning roller set as set up at upper cap and lower cap, therefore, net body can be taken out as straight line.
2. When net body is to be reeled up, through the limitation of movement location of the above mentioned protruding object by upper positioning roller set and lower positioning roller set, net body can then be reeled up into reel as a straight line, and accompanied with columnar body at front end of net body, the separation of net body from upper positioning roller set and lower positioning roller set can be avoided.
In order to let your esteemed reviewer be able to have further understanding and recognition on the features of the present invention, the following better embodiments are presented accompanied with drawings for descriptions:
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What worth noticing is that edge trim 12 and 13 is folded into a folded edge (not drawn in the figure), and the folded edge is joined with the edge trim 12 and 13 to clad the protruding object 121 and 131, therefore, protruding object 121 and 131 are fixed and prevented from dropping. In addition to using folded edge method to use edge trim 12 and 13 to fix protruding object 121 and 131, in some embodiments, each of the edge trim 12 and 13 can further be of plastic injection molding so as to clad the edge of net surface 11, next, protruding object 121 and 131 are assembled into edge trim 12 and 13. In addition to that, each of the edge trim 12 and 13 has adopted thermos-compression technique so as to clad edge of the net surface 11; moreover, the above mentioned net surface 11, edge trim 12 and 13 and protruding object 121 and 131 can be formed together using thermos-compression method.
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The above mentioned embodiment method is to use torsion spring 60 to make automatic roll-up, in addition, outer side of the upper cap 30 can be further installed with a rotational hand wheel (not drawn in figure), and the above mentioned rotational hand wheel is connected to upper shaft connecting piece 22 of the reel 20. Under the driving of the rotational hand wheel, the net body 10 can then expand, or the user can rotate the rotational hand wheel manually to roll up and receive the net body 10 into reel 20.
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To summarize, it is clear that the structure of this invention was not ever published in books or used in public, therefore, it can conform to the application keys of patent invention, hopefully, your esteemed office could give this patent a favorable approval.
