FLAT ROLL-UP STRUCTURE FOR ROLLING UP NET BODY

In a flat roll-up structure for rolling up net body flatly, at upper and lower end of net body, it is installed respectively with protruding object, meanwhile, at roll-up mechanism, it is installed with upper and lower positioning roller module to limit the movement scope of net body, therefore, when net body is to be expanded, net body, through the guidance of upper and lower positioning roller structure, can be withdrawn flatly; when protruding object used to roll up net body is limited for its movement scope by upper and lower positioning roller module, and is limited by the limiting part of upper and lower positioning roller module, the net body can then be rolled up flatly without generating up and down shift, which can avoid the generation of tying problem due to unbalanced receiving in net body.

TECHNICAL FIELD

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.

BACKGROUND

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.

SUMMARY OF THE INVENTION

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.

DETAILED DESCRIPTION

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:

As shown fromFIG.1toFIG.4, the structure of this invention is made up of a net body10, a roll-up mechanism100.

As shown inFIGS.1and2, the net body10has a grid-shaped net surface11, and upper end and lower end of the net surface11is installed respectively with edge trim12and13made up of canvas; and on the respective edge trim12and13, it is installed with a hard protruding object121and131, and the above mentioned protruding object can be of material of nylon rope and hard and flexible strip object.

As shown inFIG.1, one side of the net body10is associated above the roll-up mechanism100, and is driven by the roll-up mechanism100to expand or to roll up and receive the net body10.

As shown inFIG.1andFIG.2, the net body10, at one side relatively associated with the roll-up mechanism100, is installed with a straight traction part14, and above the traction part14, it is installed with a columnar body141, through holding columnar body141of the traction part14, the net body10can be withdrawn or reeled up flatly.

What worth noticing is that edge trim12and13is folded into a folded edge (not drawn in the figure), and the folded edge is joined with the edge trim12and13to clad the protruding object121and131, therefore, protruding object121and131are fixed and prevented from dropping. In addition to using folded edge method to use edge trim12and13to fix protruding object121and131, in some embodiments, each of the edge trim12and13can further be of plastic injection molding so as to clad the edge of net surface11, next, protruding object121and131are assembled into edge trim12and13. In addition to that, each of the edge trim12and13has adopted thermos-compression technique so as to clad edge of the net surface11; moreover, the above mentioned net surface11, edge trim12and13and protruding object121and131can be formed together using thermos-compression method.

As shown inFIGS.1and2, one side of the net body10is associated above the roll-up mechanism100, and is driven by the roll-up mechanism100to expand or to roll up and receive the net body10.

As shown inFIGS.1,3and4, the roll-up mechanism100is made up of a reel20, an upper cap30, a lower cap40and a connecting lever50.

As shown inFIGS.3and4, the above mentioned reel20contains an inner shaft21and an outer barrel22, and the inner shaft21coupled to the upper cap30and lower cap40so that the inner shaft21can rotate between the upper cap30and the lower cap40.

As shown inFIGS.3and4, the outer barrel22is set up at the outer side of the inner shaft21, and the outer barrel and the above mentioned inner shaft is coupled to21so that the outer barrel22can rotate together with the inner shaft21.

As shown inFIGS.3and4, in the main embodiment of this invention, the reel20has adopted spring winding mechanism to achieve the function of automatic roll-up; please continue to refer toFIG.3andFIG.4, wherein the inner shaft21is provides a site for installation of torsion spring60, and for the body of inner shaft21, it has an inner slot211, and one side of the above mentioned torsion spring60is embedded into the inner slot211for fixing, and another side of the torsion spring60is embedded into outer slot221of the outer barrel22; when pulling net body10installed at the reel20, outer barrel22can rotate to achieve the purpose of expansion of net body10; when releasing net body10, the torsion spring will release elastically to bring further the outer barrel22to rewind, consequently, net body10can be reeled up and received into the reel20.

The above mentioned embodiment method is to use torsion spring60to make automatic roll-up, in addition, outer side of the upper cap30can 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 piece22of the reel20. Under the driving of the rotational hand wheel, the net body10can then expand, or the user can rotate the rotational hand wheel manually to roll up and receive the net body10into reel20.

As shown inFIGS.1,3,4and5, the upper cap30is installed at the upper end of the reel20, and at inner side of the upper cap30, it is installed with a upper shaft connecting part31, an upper roller positioning part32and an upper connecting barrel33.

As shown inFIGS.1,3,4and5, the upper connecting shaft31provides a site for coupling of inner shaft21of the reel20.

As shown inFIGS.1,3,4and5, the upper roller positioning part32is installed with an upper positioning roller set34.

As shown inFIGS.1,3,4and5, the above mentioned upper positioning roller sets34contain two sets of upper positioning rollers341, and edge trim12at upper end of the net body10penetrates into the upper positioning roller set34; and between those two upper positioning rollers341, upper position-limiting part342used to limit protruding object121at upper end of the net body10is formed, and width of the upper position-limiting part342is roughly larger the protruding object121, therefore, the protruding object121can move within the upper position-limiting part342without separating from it, furthermore, the upper cap30is installed with an upper opening301at the front end of the upper roller positioning part32, in addition, columnar body141of the traction part14, when the net body10is rolling up, can just stop and block at the front end of the upper positioning roller set34.

As shown inFIGS.1,3,4and5, the upper connecting barrel33provides a site for installation of the connecting lever50.

As shown inFIGS.1,3,4and6, the lower cap40is installed at the lower end of the reel20, and at inner side of the lower cap40, it is installed with a lower shaft connecting part41, a lower roller positioning part42and a lower connecting barrel43.

As shown inFIGS.1,3,4and6, the lower connecting shaft41provides a site for connection of lower end of inner shaft21of the reel20.

As shown inFIGS.1,3,4and6, the lower roller positioning part42is installed with a lower positioning roller set44.

As shown inFIGS.1,3,4and6, the above mentioned lower positioning roller set44contain two sets of lower positioning rollers441, and edge trim13at lower end of the net body10penetrates into the lower positioning roller set44; and between those two lower positioning rollers441, lower position-limiting part442used to limit protruding object131at lower end of the net body10is formed, and width of the lower position-limiting part442is slightly larger than the protruding object131so that the protruding object131can move within the lower position-limiting part442without separating from it; and the lower cap40is installed with a lower opening401at front end of the lower roller positioning part42.

As shown inFIGS.1,3,4and6, the lower connecting barrel43provides a site for installation of the connecting lever50.

As shown inFIGS.1,3,4and6, protruding object121and131at the upper and lower end of the net body10penetrates respectively into upper position-limiting part342of the above mentioned upper positioning roller set34and lower position-limiting part442of the above mentioned lower positioning roller set44so that the net body10, under limitation by the upper position-limiting part342and the lower position-limiting part442, can expand flatly, or be rolled up and received flatly into the reel20.

As shown inFIGS.3and7, the lower cap40is installed with a penetrating hole431at the lower connecting barrel43, and the connecting lever50is a retractable stick used to take out the connecting lever50from the penetrating hole431so as to fix the present invention.

As shown inFIG.8, the upper cap30and the lower cap40is installed respectively with connecting ring part35and45, and each of the connecting ring part35and45provides site for penetration and hitching by a rope body H. Therefore, when the structure of this invention is to be fixed, the above mentioned rope body H penetrates and hitches on each of the connecting ring part35and45, next, rope body H is fixed on the ground or the fixing rack of the ball game, consequently, this invention can be used firmly.

As shown inFIG.8, according to the technique of the above mentioned embodiment, for further embodiment, the lower cap40can be selected, and a penetrating hole431is installed at the lower connecting barrel43, and the above mentioned penetrating hole431can be penetrated by a fixing pole70.

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.

DESCRIPTION OF SYMBOLS