CN105983219A

CN105983219A - Football door frame

Info

Publication number: CN105983219A
Application number: CN201510055983.3A
Authority: CN
Inventors: 杨泳豪
Original assignee: JIAO HSIUNG INDUSTRY CORP
Current assignee: JIAO HSIUNG INDUSTRY CORP; Jiao Hsiung Ind Corp
Priority date: 2015-02-03
Filing date: 2015-02-03
Publication date: 2016-10-05

Abstract

The invention relates to a football door frame comprising multiple folding joints, as well as two side upright bars, two side bottom bars, an upper cross bar and a lower cross bar which are connected via the folding joints. A first connector and a second connector of each folding joint are rotated and fixed to the relative 90-degree position, then relative positions of the side upright bars, the side bottom bars, the upper cross bar and the lower cross bar can be fixed, and accordingly the football door frame is unfolded; when the first connector and the second connector of each folding joint rotate to be parallel to each other, the side upright bars, the side bottom bars, the upper cross bar and the lower cross bar can be folded to facilitate storage and carrying.

Description

Football doorframe

Technical field

The present invention relates to a kind of football doorframe, particularly relating to a kind of collapsible so that receiving and the football of transport Doorframe.

Background technology

Football, hockey, handball ... wait the match mode of ball game mainly to be injected by ball and defended by opponent Goal in, often scored a goal and can get a point, after no side, the team scored the most points won.

Metal rod is mainly welded to each other and is formed by the goal of prior art, and structural strength is high, can bear The high-speed impact of ball, but because volume is big, shape is fixed, therefore is difficult to receive and move, be the most all placed in At fixed position on sports ground for athlete exercise or match be used, athlete be difficult at non-athletic field from Row sets up goal exercise.

Therefore prior art separately has available joint that some rod members are assembled into goal person, should be in the bar of dismounting state Part and joint, in addition to can reducing accommodation space in a large number, are more beneficial for carrying, allow the athlete can be at sports ground Outside place set up goal voluntarily to practise.Only, this utilizes goal that joint and rod member formed still Have and assemble and dismount the problem that step is complicated, time-consuming, and structural strength is low, easily topples over because of the shock of ball Or disintegrate, need to be improved further.

Summary of the invention

Because aforementioned the deficiencies in the prior art, the main creation purpose of the present invention is to provide a kind of goal football Frame, it is collapsible so that receiving and transporting, and tool pliability is with buffering percussive force.

In order to reach above-mentioned creation purpose, the technology used in the present invention means make a football doorframe include:

Multiple folding joints, each folding joint comprises one first connector and one second connector, and this is first years old Connector and the mutual pivot joint of the second connector, and this first connector and the second connector the most relative Pivoting or be fixed on a relative angular position, this first connector has a fixed connecting end, and this second connector has There is a fixed connecting end；

Two edge-on bars, it is that interval vertical is arranged, and each edge-on bar has a upper end and a lower end；

Two side bottom bars, it is spaced horizontally set, and every side bottom bar has a front end and a rear end, at the bottom of this two side The front end of bar respectively to should the lower end of two edge-on bars, the front end of every side bottom bar connects via a folding joint The lower end of corresponding edge-on bar, the front end of this side bottom bar is connected to corresponding with the lower end of this edge-on bar respectively The fixed connecting end of the first connector of folding joint and the fixed connecting end of the second connector；

One cross tube, the upper end of its both ends this two edge-on bar the most corresponding, every one end warp of this cross tube The upper end of the upper end of corresponding edge-on bar, the end of this cross tube and this edge-on bar is connected by a folding joint It is connected to fixed connecting end and the fixed connecting end of the second connector of the first connector of corresponding folding joint respectively；

One sheer pole, the rear end of its both ends this two sides bottom bar the most corresponding, every one end warp of this sheer pole The rear end of the rear end of corresponding side bottom bar, the end of this sheer pole and this side bottom bar is connected by a folding joint It is connected to fixed connecting end and the fixed connecting end of the second connector of the first connector of corresponding folding joint respectively.

First connector of above-mentioned each folding joint can have a joggle end further, this first connector At joggle end, projection is formed with two sidewall panelings, and this two sidewall paneling arranges separately and therebetween forms a joggle Groove, is formed with an interlocking guide groove on the internal face of at least one sidewall paneling, and the bearing of trend of this interlocking guide groove hangs down Straight axial in this first connector, and one end of this interlocking guide groove runs through this sidewall paneling；

Second connector of above-mentioned each folding joint can have a joggle end further, this second connector At joggle end, axial projection shapes a joggle, and this joggle is arranged in the joggle groove of this first connector, On this joggle, indent is formed with an elongated slippage slot, and this slippage slot is axially extending along this second connector And run through the end of this joggle；

Above-mentioned each folding joint can have further fixes pin member, and this fixing pin member is arranged in slidably In the joggle groove of this first connector, this fixing pin member is formed with at least one positioning convex portion convex with a sliding Portion, this at least one positioning convex portion forms at least one side of this fixing pin member, when this fixing pin member is relative When this first connector slides, this positioning convex portion is optionally embedded in this interlocking guide groove or to exit this embedding Connecing guide groove, this sliding protuberance forms in the bottom of this fixing pin member, and slidably correspondence be embedded at this second In the slippage slot of connector.

Bottom in the slippage slot of the second connector of above-mentioned each folding joint can indent be formed further One elongated stopper slot, this stopper slot is axially extending along this second connector, above-mentioned each folding joint Can be formed with a stopper protrusion further on the sliding protuberance of fixing pin member, this stopper protrusion is the most corresponding It is stretched in the stopper slot of this second connector.

The section of the slippage slot of the second connector of above-mentioned each folding joint and the sliding of fixing pin member are convex The section in portion can be the dovetail form matched

Can be elastic via one between the lower end of above-mentioned each edge-on bar and the fixed connecting end of folding joint being connected with group Part connects.

Above-mentioned cross tube is scalable with the length of sheer pole.

Above-mentioned each cross tube and sheer pole can include a trocar sheath, a telescoping tube and a locking ring, this overcoat One end of pipe is fixed in the fixed connecting end of corresponding folding joint, the other end is a socket end, this trocar sheath Socket end be provided with at least one profile groove, this trocar sheath socket end outside wall surface be provided with an external screw thread Portion, one end of this telescoping tube is fixed in the fixed connecting end of corresponding folding joint, the other end is a retractable ends, The retractable ends of this telescoping tube is arranged in this trocar sheath from the socket end of this trocar sheath, and this locking ring is sheathed In the outside of the socket end of this trocar sheath, the internal face of this locking ring is provided with an internal thread part, this interior spiral shell Stricture of vagina portion optionally combines with the external thread part of this trocar sheath.

A stop protuberance, stretching of above-mentioned telescoping tube can be provided with on the internal face of the socket end of above-mentioned trocar sheath A stop protuberance can be provided with in the outside wall surface of contracting end, the stop protuberance of this telescoping tube can with this trocar sheath only Dynamic protuberance leans.

Above-mentioned telescoping tube can comprise an outer tube and an inner tube, and this outer tube is mutually assembled with coaxial manner with inner tube, It is mutual with one end of this inner tube that one end of this outer tube is fixed in the fixed connecting end of corresponding folding joint, the other end Affixed, this inner tube is arranged in this trocar sheath, and the stop protuberance of above-mentioned telescoping tube is formed at the outer wall of this inner tube Face.

The external diameter of above-mentioned inner tube is less than the internal diameter of this trocar sheath, the external diameter of above-mentioned outer tube and the external diameter of this trocar sheath Isometric.

It is an advantage of the current invention that and rotate also by by the first connector and second connector of each folding joint It is fixed on the position of relative 90 degree, this edge-on bar, side bottom bar, cross tube and sheer pole can be fixed Position relatively, so that this football doorframe presents the state of expansion；Afterwards, as long as by the of each folding joint A connection piece and the second connector turn to the state being parallel to each other, can make this edge-on bar, side bottom bar, on Cross bar and sheer pole are superposed, in order to receive and move.Additionally, set by the lower end of this edge-on bar Elastic component then can make this edge-on bar and cross tube along ball the lateral beat of impact force, rock, it is to avoid whole foot Woodwork overturns because of impact force.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as to the present invention's Limit.

Accompanying drawing explanation

Fig. 1 is the stereo appearance figure of the present invention；

Fig. 2 is the stereo appearance figure of the folding joint of the present invention；

Fig. 3 is the stereoscopic motion figure of the folding joint of the present invention；

Fig. 4 is the three-dimensional exploded view of the folding joint of the present invention；

Fig. 5 is another three-dimensional exploded view of the folding joint of the present invention；

Fig. 6 is the diagrammatic side-view cross-sectional enlarged drawing of the cross bar of the present invention；

Fig. 7 is the stereo decomposing enlarged drawing of the cross bar of the present invention；

Fig. 8 is the stereo decomposing enlarged drawing of the cross bar of another preferred embodiment of the present invention；

Fig. 9 and Figure 10 is the folding action side view of the present invention.

Wherein, reference

10 folding joint 11 first connectors

111 sidewall paneling 112 joggle grooves

113 interlocking guide groove 12 second connectors

121 joggle 122 slippage slots

123 stopper slots 13 fix pin member

131 positioning convex portion 132 sliding protuberances

133 stopper protrusion 14 Pivots

21 edge-on bar 22 side bottom bars

23 cross tube 231 trocar sheaths

2311 profile groove 2312 external thread parts

2313 stop protuberances 232,232' telescoping tube

232a, 232a' outer tube 232b, 232' inner tube

2321 stop protuberance 233 locking rings

2331 internal thread part 24 sheer poles

25 elastic components

30 nets

Detailed description of the invention

With the following drawings and preferred embodiments of the present invention, the present invention is expanded on further for reaching predetermined creation The technological means that purpose is taked.

Shown in Figure 1, the football doorframe of the present invention include the edge-on bar 21 of multiple folding joint 10, two, Two side bottom bar 22, cross tube 23 and sheer poles 24.

With further reference to shown in Fig. 2 and Fig. 3, each folding joint 10 comprises one first connector 11, Second connector 12 and fixes pin member 13.

Coordinating shown in Figure 4, this first connector 11 and the second connector 12 are with Pivot 14 phase Mutually pivot joint, one end of this first connector 11 be fixed connecting end, the other end be joggle end, this first connector At the joggle end of 11, projection is formed with two sidewall panelings 111, and this two sidewall paneling 111 is arranged and therebetween separately Forming a joggle groove 112, each sidewall paneling 111 has an internal face of corresponding opposite side wallboard 111, its In, the internal face of at least one sidewall paneling 111 is formed with an interlocking guide groove 113, this interlocking guide groove 113 Extend perpendicularly to the axial of this first connector 11, and this is run through in one end of this interlocking guide groove 113 Sidewall paneling 111.

Coordinate shown in Figure 5, one end of this second connector 12 be fixed connecting end, the other end be joggle end, At the joggle end of this second connector 12, axial projection shapes a joggle 121, and this joggle 121 wears In the joggle groove 112 of this first connector 11, on this joggle 121, indent is formed with an elongated cunning Moving groove 122, this slippage slot 122 is along the axially extending of this second connector 12 and runs through this joggle 121 End, the further indent in bottom in this slippage slot 122 is formed with an elongated stopper slot 123, this limit Position groove 123 also axially extending along this second connector 12.

This fixing pin member 13 is arranged in the joggle groove 112 of this first connector 11 slidably, and this is fixed At least one positioning convex portion 131, sliding protuberance 132 and a stopper protrusion 133 it is formed with in pin member 13.Should At least one positioning convex portion 131 forms at least one side of this fixing pin member 13, when this fixing pin member 13 When this first connector 11 slides relatively, this positioning convex portion 131 is optionally embedded in this interlocking guide groove In 113 or exit this interlocking guide groove 113, in the preferred embodiment, this first connector 11 Two side wall panels 111 be respectively formed on this interlocking guide groove 113, on the two relative side of this fixing pin member 13 It is respectively formed with this positioning convex portion 131.This sliding protuberance 132 forms in the bottom of this fixing pin member 13, And correspondence is embedded in the slippage slot 122 of this second connector 12 slidably, in the preferable reality of the present invention Execute in example, the section of the slippage slot 122 of above-mentioned second connector 12 and the sliding protuberance of fixing pin member 13 The section of 132 is the dovetail form matched.This stopper protrusion 133 forms in this sliding protuberance 132 further On, and correspondence is stretched in the stopper slot 123 of this second connector 12 slidably.

Wherein, the stopper slot 123 of this second connector 12 of mat and dovetail form slippage slot 122 and this fix The stopper protrusion 133 of pin member 13 and the design of dovetail form sliding protuberance 132, can avoid this fixing pin member 13 Depart from this second connector 12.Also, when the positioning convex portion 131 of this fixing pin member 13 is embedded in this first company Time in the scarfing slot 112 of fitting 11, this first connector 11 can be fixed relative with the second connector 12 Angle position；When the positioning convex portion 131 of this fixing pin member 13 slides out the scarfing slot of this first connector 11 When 112, this second connector 12 this first connector 11 relative with fixing pin member 13 can be made to pivot.

As it is shown in figure 1, this two edge-on bar 21 interval vertical arrange, each edge-on bar 21 have a upper end with One lower end, this two sides bottom bar 22 is spaced horizontally set, and every side bottom bar 22 has a front end and a rear end, The front end of this two sides bottom bar 22 respectively to should the lower end of two edge-on bars 21, the front end of every side bottom bar 22 The lower end of corresponding edge-on bar 11 is connected via a folding joint 10.Specifically, this side bottom bar 22 The lower end of front end and this edge-on bar 11 be connected to the consolidating of the first connector 11 of this folding joint 10 respectively Connect the fixed connecting end of end and the second connector 12, make this edge-on bar 21 can be pivoted relative to each other with side bottom bar 22, roll over Folded.

The upper end of the both ends of this cross tube 23 this two edge-on bar 21 the most corresponding, this cross tube 23 every One end connects the upper end of corresponding edge-on bar 21 via a folding joint 10.Specifically, horizontal stroke on this The upper end of the end of bar 23 and this edge-on bar 21 is connected to the first connector 11 of this folding joint 10 respectively Fixed connecting end and the fixed connecting end of the second connector 12, make this edge-on bar 21 can be pivoted relative to each other with cross tube 23, Fold.

The rear end of the both ends of this sheer pole 24 this two sides bottom bar 22 the most corresponding, this sheer pole 24 every One end connects the rear end of corresponding side bottom bar 22 via a folding joint 10.Specifically, this lower horizontal stroke The rear end of the end of bar 24 and this side bottom bar 22 is connected to the first connector 11 of this folding joint 10 respectively Fixed connecting end and the fixed connecting end of the second connector 12, make this side bottom bar 22 and sheer pole 24 to be pivoted relative to each other, Fold.

As it is shown in figure 1, in the preferred embodiment, the lower end of above-mentioned each edge-on bar 21 and phase Connect via an elastic component 25 between the fixed connecting end of the folding joint 10 that group connects, make this edge-on bar 21 with upper Cross bar 23 can this side bottom bar 22 and sheer pole 24 double swerve relatively.Specifically, this elastic component 25 It can be spring.

With further reference to shown in Fig. 6 and Fig. 7, in the preferred embodiment, above-mentioned cross tube 23 Scalable with the length of sheer pole 24, to adjust the width of this football doorframe further, with cross tube 23 As a example by, this cross tube 23 includes trocar sheath 231, telescoping tube 232 and a locking ring 233.

One end of this trocar sheath 231 is fixed in the corresponding fixed connecting end of folding joint 10, the other end is one Socket end, the socket end of this trocar sheath 231 is provided with at least one profile groove 2311, and this profile groove 2311 is parallel This trocar sheath 231 axially extending, separately the outside wall surface of the socket end of this trocar sheath 231 is provided with outside one Threaded portion 2312, internal face are provided with a stop protuberance 2313.

One end of this telescoping tube 232 is fixed in the corresponding fixed connecting end of folding joint 10, the other end is one Retractable ends, the retractable ends of this telescoping tube 232 is arranged in this overcoat from the socket end of this trocar sheath 231 In pipe 231, and the outside wall surface of the retractable ends of this telescoping tube 232 is provided with a stop protuberance 2321, should The stop protuberance 2321 of telescoping tube 232 can lean with the stop protuberance 2313 of this trocar sheath 231, with limit Make this telescopic length of cross tube 23, avoid this telescoping tube 232 to depart from this trocar sheath 231 simultaneously.

This locking ring 233 is sheathed on the outside of the socket end of this trocar sheath 231, and this locking ring 233 Internal face be provided with an internal thread part 2331, owing to the socket end of this trocar sheath 231 is provided with profile groove 2311, therefore work as the internal thread part 2331 of this locking ring 233 and the external thread part 2312 of this trocar sheath 231 When combining, the socket end of this trocar sheath 231 can be forced to be clamped on this expansion link 232, thus fix and be somebody's turn to do Trocar sheath 231 position relative with expansion link 232 and fix the length of this cross tube 23.

Also, as shown in FIG. 6 and 7, in the preferred embodiment, above-mentioned telescoping tube 232 comprises One outer tube 232a and inner tube 232b, this outer tube 232a is that two pipe fittings separated are with coaxially with inner tube 232b Mode is mutually assembled, and one end of this outer tube 232a is fixed in the fixed connecting end of corresponding folding joint 10, another One end is fixedly connected with each other with one end of this inner tube 232b, and this inner tube 232b is arranged in this trocar sheath 231, and The stop protuberance 2321 of above-mentioned telescoping tube 232 is formed at the outside wall surface of this inner tube 232b, wherein, this inner tube The external diameter of 232b, less than the internal diameter of this trocar sheath 231, makes this inner tube 232b can be arranged in this trocar sheath 231 In, the external diameter of this outer tube 232a is then isometric with the external diameter of this trocar sheath 231 so that when this inner tube 232b When submerging in this trocar sheath 231 completely, this trocar sheath 231 can present smooth with the outside wall surface of outer tube 232a The form connected.

With further reference to another preferred embodiment of the present invention shown in Fig. 8, above-mentioned outer tube 232a' and inner tube 232b' can also be made described telescoping tube 232' in integrally formed mode.

The stretching structure of this sheer pole 24 is identical with this cross tube 23, repeats no more for this reason.

As shown in Figure 1 to Figure 3, when the football doorframe of the present invention to be set up, first by each folding joint 10 The first connector 11 be switched to relative 90 degree of settings with the second connector 12, making this football doorframe is exhibition Open state, the most again this fixing pin member 13 is pushed in the joggle groove 12 of this first connector 11 with this A connection piece 11 phase fixes, to fix the relative position of this first connector 11 and the second connector 12, Thus fix this edge-on bar 21, side bottom bar 22, cross tube 23 and sheer pole 24, the most also can be in this The side of the football doorframe in deployed condition installs a net 30 additional.Wherein, when this edge-on bar 21 is by ball During shock, owing to the lower end of this edge-on bar 21 is provided with elastic component 25, therefore this edge-on bar 21 can be made with upper Cross bar 23 along impact force lateral beat, rock, it is to avoid whole football doorframe overturns because of impact force.

Coordinate shown in Figure 9, when wanting the goal football of the folding present invention, first by each folding joint 10 Fixing pin member 13 releases the joggle groove 12 of this first connector 11, is the most first pivotally connected this edge-on bar 21 With the first connector 11 and the second connector 12 of the folding joint 10 of side bottom bar 22, make this edge-on bar 21 It is stacked with sheer pole 24 with this side bottom bar 22 respectively with cross tube 23；With further reference to shown in Figure 10, connect The first connector 11 and second being pivotally connected this edge-on bar 21 again with the folding joint 10 of cross tube 23 Connector 12 and be pivotally connected first connector of this side bottom bar 22 and the folding joint 10 of sheer pole 24 11 and second connector 12, this edge-on bar 21, side bottom bar 22, cross tube 23 and sheer pole can be made 24 is superposed, in order to receives and moves.

Certainly, the present invention also can have other various embodiments, without departing substantially from present invention spirit and the feelings of essence thereof Under condition, those of ordinary skill in the art work as can make various corresponding change and deformation according to the present invention, but These change accordingly and deform the protection domain that all should belong to appended claims of the invention.

Claims

1. a football doorframe, it is characterised in that include at the bottom of multiple folding joint, two edge-on bars, two sides Bar, a cross tube and a sheer pole, wherein:

Each folding joint comprises one first connector and one second connector, and this first connector and second is even The mutual pivot joint of fitting, and this first connector and the second connector can optionally be pivoted relative to each other or be fixed on One relative angular position, this first connector has a fixed connecting end, and this second connector has a fixed connecting end；

This two edge-on bar interval vertical is arranged, and each edge-on bar has a upper end and a lower end；

This bottom bar interval, two sides horizontally set, every side bottom bar has a front end and a rear end, this two sides bottom bar Front end respectively to should the lower end of two edge-on bars, the front end of every side bottom bar connects phase via a folding joint The lower end of corresponding edge-on bar, the front end of this side bottom bar is connected to corresponding with the lower end of this edge-on bar respectively The fixed connecting end of the first connector of folding joint and the fixed connecting end of the second connector；

The upper end of the both ends of this cross tube this two edge-on bar the most corresponding, every one end of this cross tube via One folding joint connects the upper end of corresponding edge-on bar, and the upper end of the end of this cross tube and this edge-on bar is divided It is not connected to fixed connecting end and the fixed connecting end of the second connector of the first connector of corresponding folding joint；

The rear end of the both ends of this sheer pole this two sides bottom bar the most corresponding, every one end of this sheer pole via One folding joint connects the rear end of corresponding side bottom bar, and the rear end of the end of this sheer pole and this side bottom bar is divided It is not connected to fixed connecting end and the fixed connecting end of the second connector of the first connector of corresponding folding joint.

Football doorframe the most according to claim 1, it is characterised in that

First connector of aforementioned each folding joint has a joggle end, the tenon of this first connector further Connecing projection at end and be formed with two sidewall panelings, this two sidewall paneling arranges and is therebetween formed a joggle groove separately, The internal face of at least one sidewall paneling is formed an interlocking guide groove, extending perpendicularly to of this interlocking guide groove This first connector axial, and one end of this interlocking guide groove runs through this sidewall paneling；

Second connector of aforementioned each folding joint has a joggle end, the tenon of this second connector further Connecing axial projection at end and shape a joggle, this joggle is arranged in the joggle groove of this first connector, should On joggle, indent is formed with an elongated slippage slot, this slippage slot along this second connector axially extending also Run through the end of this joggle；

Aforementioned each folding joint has further fixes pin member, and this fixing pin member can be arranged in slidably In the joggle groove of this first connector, this fixing pin member is formed with at least one positioning convex portion convex with a sliding Portion, this at least one positioning convex portion forms at least one side of this fixing pin member, when this fixing pin member is relative When this first connector slides, this positioning convex portion can optionally be embedded in this interlocking guide groove or exit this Interlocking guide groove, this sliding protuberance forms in the bottom of this fixing pin member, and correspondence can be embedded at this slidably In the slippage slot of the second connector.

Football doorframe the most according to claim 2, it is characterised in that aforementioned each folding joint The further indent in bottom in the slippage slot of the second connector is formed with an elongated stopper slot, this stopper slot edge This second connector axially extending, on the sliding protuberance of the fixing pin member of aforementioned each folding joint further Being formed with a stopper protrusion, this stopper protrusion can the corresponding stopper slot being stretched on this second connector slidably In.

Football doorframe the most according to claim 2, it is characterised in that aforementioned each folding joint The section of the section of the slippage slot of the second connector and the sliding protuberance of fixing pin member is the dovetail matched Shape.

Football doorframe the most according to any one of claim 1 to 4, it is characterised in that aforementioned often Connect via an elastic component between the lower end of side vertical rod with the fixed connecting end of the folding joint being connected with group.

Football doorframe the most as claimed in any of claims 1 to 4, it is characterised in that aforementioned Cross tube can stretch with the length of sheer pole.

Football doorframe the most according to claim 6, it is characterised in that aforementioned each cross tube and under Cross bar includes a trocar sheath, a telescoping tube and a locking ring, and one end of this trocar sheath is fixed in corresponding folding The splice fixed connecting end of head, the other end is a socket end, and the socket end of this trocar sheath is provided with at least one profile groove, The outside wall surface of the socket end of this trocar sheath is provided with an external thread part, and one end of this telescoping tube is fixed in phase The corresponding fixed connecting end of folding joint, the other end are a retractable ends, and the retractable ends of this telescoping tube is outer from this The socket end of sleeve pipe is arranged in this trocar sheath, and this locking ring is sheathed on outside the socket end of this trocar sheath Side, the internal face of this locking ring is provided with an internal thread part, this internal thread part optionally with this trocar sheath External thread part combines.

Football doorframe the most according to claim 7, it is characterised in that the socket end of aforementioned trocar sheath Internal face at portion is provided with a stop protuberance, and the outside wall surface of the retractable ends of aforementioned telescoping tube is only provided with one Dynamic protuberance, the stop protuberance of this telescoping tube can lean with the stop protuberance of this trocar sheath.

Football doorframe the most according to claim 8, it is characterised in that aforementioned telescoping tube comprises outside one Guan Yuyi inner tube, this outer tube is mutually assembled with coaxial manner with inner tube, and one end of this outer tube is fixed in corresponding The fixed connecting end of folding joint, the other end be fixedly connected with each other with one end of this inner tube, this inner tube is arranged in this overcoat Guan Zhong, the stop protuberance of aforementioned telescoping tube is formed at the outside wall surface of this inner tube.

Football doorframe the most according to claim 9, it is characterised in that the external diameter of aforementioned inner tube is less than The internal diameter of this trocar sheath, the external diameter of aforementioned outer tube is isometric with the external diameter of this trocar sheath.