CN203362727U - Fixing device - Google Patents

Abstract

The utility model provides a fixing device. The fixing device comprises a sleeve and a fixing element, wherein a positioning part, located at a place where a hole of a plate body is, is arranged below a through hole of the sleeve; an annular convex part which extends obliquely is formed at the circumference above the through hole; the fixing element is provided with a head part located at the upper side of the sleeve; the bottom surface of the head part extends downwards to form a rod body penetrating the through hole and a connecting part below the rod body; an annular blocking part is formed outwards at a place where the rod body is adjacent to the connecting part; an elastic element located between the sleeve and the fixing element is sleeved on the rod body; when the head part of the fixing element, which is ejected to the annular convex part of the sleeve in a stamping way, is deformed, and the aperture is reduced, the annular convex part can be supported on the head part by the virtue of the elastic element, and the annular blocking part is interlocked to be supported on the annular convex part for blocking and positioning. Therefore, the whole gravity center of the fixing element after being rebounded from rising can be kept steady, a heat part flatting function is achieved, and subsequent welding or locked connection with better precision is facilitated.

Description

Fixing device

Technical field

The utility model provides a kind of fixing device, it in the perforation of sleeve, is espespecially the shaft that penetrates fixed element, and be formed with the ring protuberance in perforation top peripheral region, and the shaft of fixed element is formed with outwardly and is held in the annular stop part that forms the block location on the ring protuberance adjacent to the place, joining portion, to guarantee thering is the function that head flattens after fixed element rising resilience.

Background technique

General panel (plate is to plate) is when being combined, utilization possesses knob is arranged, the set screw of the collar and screw gives interlocking, screw, the collar can be fixed on the first panel, and turn makes screw form preset location for locking in the second panel in knob, the recycling hand tools is by after screw lock, the first panel and the second panel interlocking are fixed into and are integrated, and can be used on the equipment that telecommunication bureau's rack, industrial computer, machine tool etc. utilize plural device, formation that mechanism organizes and make plate plate is connected and uses.

Moreover, just having the dealer to develop this kind is by cap bag, the floating screw that screw rod and positioning seat form, and after the positioning seat button of floating screw being fixed in the perforation of sheet material, it is fixing that the recycling screw rod comes interlocking to form on another sheet material, and when the user unloads sheet material, floating screw still can be fixed in the perforation of sheet material and can not cause loss by positioning seat, also there is the dealer to develop a fixing device, it is to be assembled with a lock-connecting piece in sleeve, and be held in the backstop bulge loop of sleeve outside by outside sheathed elastomer one end of sleeve, and the elastomeric the other end is held in the place, cap head bottom surface that lock-connecting piece has, the screw rod again place, the cap head bottom surface of lock-connecting piece extended penetrates the containing space in sleeve inner, just can be positioned at the backstop block of containing space on the screw rod of lock-connecting piece by sleeve, lock-connecting piece can not deviate from, and become the activity mated condition with sleeve shape.

Yet, be formed with angle between its axis and helix during the external thread of screw moulding of this lock-connecting piece, so the screw rod of lock-connecting piece just can produce a little angle excursion after being held on backstop, make the axis of lock-connecting piece can't remain on the central shaft position, and cause suction nozzle to be adsorbed in mobilely on the cap head of lock-connecting piece to be difficult for aiming at perforation place on sheet material while carrying out weld job, or even cause screw rod can't be aligned with the lockhole place of another sheet material, cause screw rod just can carry out interlocking after deflection one angle, to cause lockhole easily to produce off normal or type change, and inconvenience and difficulty in the operation of increase interlocking, if it is excessive to utilize electric tools or hand tools to drive when the lock-connecting piece interlocking application of force, more easily causing screw rod to produce has the situation that collapses tooth or fracture to occur, overall structure stability is also poor, this is and remains to be engaged in the direction place that this journey dealer desires most ardently the research improvement.

The model utility content

Therefore, inventor of the present utility model is because problem and the disappearance of existing fixing device, so collect related data via in many ways assessing and considering, and utilize the research and development experience for many years of engaging in the industry constantly study and revise, begin to design the model utility birth of this kind of fixing device.

Main purpose of the present utility model is that place, perforation below that sleeve has is provided with the positioning part at the hole place that is positioned plate body, and perforation top peripheral region is formed with the ring protuberance of tiltedly stretching shape, and fixed element has the head that is positioned at place, sleeve top, and be provided with in place, head bottom surface shaft and the joining portion penetrated in perforation to downward-extension, and shaft is formed with annular stop part outwardly adjacent to the place, joining portion, on shaft, be to be arranged with the elastic element be positioned between sleeve and fixed element again, when the head of fixed element for making it produce distortion on the ring protuberance of sleeve with the impact style ejection and aperture dwindles, just can rely on elastic element elasticity to support to arrive on head, and interlock annular stop part is held in formation block location on the ring protuberance, keep stable with whole center of gravity after guaranteeing fixed element rising resilience, and there is the function of head leveling, can be more accurate when being beneficial to follow-up welding or interlocking operation and carrying out.

Secondary objective of the present utility model is that the positioning part of this sleeve is formed with annular outwardly and supports body, and the annular that on the fixed element shaft, sheathed elastic element one end is held in positioning part supports on body, and support to arrive in the place, head bottom surface of fixed element and be the resiliently deformable displacement by elastic element the other end elasticity, this kind of elastic element is sheathed on the sleeve outside and can be subject to the restriction in position and space, can increase elastic element elasticity and support to arrive in the elastic displacement stroke in fixed element, and in the situation that reducing, the sleeve whole height still can provide fixed element enough resilience strength, make elastic element be difficult for occur that stress is concentrated or the problem of the elastic fatique derivative permanent deformation of institute or shortening in working life, also can keep the suitable pre-power of elasticity and can not produce excessive deformation or structural damage.

Another purpose of the present utility model is to have outside thread on the joining portion below this fixed element shaft, and the shaft external diameter is the standard pitch diameter that is greater than joining portion, torsion strength in the time of can increasing electric tools or hand tools (as screwdriver or spanner etc.) and butt up against actuating part on head and drive shaft and joining portion lock and turn, to avoid because of the situation generation of the not enough institute of the fixed element overall construction intensity shaft that caused adjacent to joining portion place's excessive generation slight crack of shearing or fracture.

A purpose more of the present utility model is to be combined with outer sleeve for utilizing assembling or imbedding shoot mode on the head of fixed element; just can rely on outer sleeve to cover in sleeve and elastic element outside and prevent that foreign matter from entering; the effect that there is protection to guarantee its normal usage function; and make elastic element be hidden in that outer sleeve inside can not be exposed and integral body is more attractive in appearance; and also can there are the word, pattern, numeral, mark, symbol etc. of particular color on the outer sleeve surface, be beneficial to the position etc. that function (as locking or dismounting etc.) or mark location are used in identification.

For reaching above-mentioned purpose, the utility model provides a kind of fixing device, and it includes sleeve and fixed element, wherein:

The hollow inside of this sleeve has perforation, and is provided with the positioning part at the hole place that is positioned default plate body in place, perforation below, and perforation top peripheral region is formed with the ring protuberance of tiltedly stretching shape;

This fixed element has and is positioned at sleeve top place ejection and makes to encircle protuberance in the ring protuberance and produce the head that distortion and aperture dwindle, and be provided with the shaft that penetrates in perforation and the joining portion of shaft below to downward-extension in head bottom surface place, and the shaft of fixed element is formed with outwardly to be held on the ring protuberance adjacent to joining portion place and carries out the annular stop part of block location, and be arranged with on shaft and be positioned at the elastic element that is the resiliently deformable displacement between sleeve and fixed element.

Described fixing device, wherein, the perforation top peripheral region of this sleeve is formed with the face that holds of smooth shape outwardly, and the ring upper and lower both side surface of protuberance place is formed with respectively for head bottom surface place's ejection of fixed element and forms a coplanar ejection face and support the stop surface that forms thereon the block location for annular stop part with the face of holding.

Described fixing device, wherein, the positioning part of this sleeve is formed with annular outwardly and supports body, and the annular that on the fixed element shaft, sheathed elastic element one end is held in positioning part supports on body, and support to arrive in the place, head bottom surface of fixed element and be the resiliently deformable displacement by elastic element the other end elasticity.

Described fixing device, wherein, the annular of this sleeve positioning part supports the body place and extends a hollow locating column, and the external diameter of this hollow locating column is less than the external diameter that annular supports body, and is provided with annular ditch groove in the locating column outer surface.

Described fixing device, wherein, the annular of this sleeve positioning part supports the body place for extending a hollow locating column, and the external diameter of this hollow locating column is less than the external diameter that annular supports body, and supports body in annular and be formed with a joint surface towards the lateral surfaces of locating column.

Described fixing device, wherein, have outside thread on the joining portion of this fixed element, and the shaft external diameter is the standard pitch diameter that is greater than joining portion.

Described fixing device, wherein, the external diameter of the annular stop part of this fixed element is greater than the shaft external diameter, and is formed with adjacent to the lateral surfaces of shaft the supporting surface that carries out the block location on the ring protuberance that is held in sleeve in annular stop part.

Described fixing device, wherein, the head surface of this fixed element is provided with the actuating part of cross recess, interior hexagonal groove, rice word groove or hexagon projection, and is formed with the interface of a plurality of double wedges, embossing face or positioning convex point in head periphery place.

Described fixing device, wherein, on the head of this fixed element, utilize assembling mode to be combined with outer sleeve, and be formed with the containing space covered in sleeve and elastic element outside in outer sleeve inside, and be positioned at the containing space top and be provided with in conjunction with the fixed groove be positioned on the interface of fixation element head.

Described fixing device, wherein, utilize on the head of this fixed element and imbed that shoot mode is one-body molded outer sleeve, and be formed with the containing space covered in sleeve and elastic element outside in outer sleeve inside.

The beneficial effects of the utility model are: guarantee that whole center of gravity keeps stable after fixed element rising resilience, and there is the function of head leveling, and can be more accurate when being beneficial to follow-up welding or interlocking operation and carrying out; Elastic element be difficult for to occur that stress is concentrated or the problem of the elastic fatique derivative permanent deformation of institute or shortening in working life, also can keep the suitable pre-power of elasticity and can not produce excessive deformation or structural damage; Avoid because of the situation generation of the not enough institute of the fixed element overall construction intensity shaft that causes adjacent to joining portion place's excessive generation slight crack of shearing or fracture; The effect that there is protection to guarantee its normal usage function; and make elastic element be hidden in that outer sleeve inside can not be exposed and integral body is more attractive in appearance; and also can there are the word, pattern, numeral, mark, symbol etc. of particular color on the outer sleeve surface, be beneficial to the position etc. that function (as locking or dismounting etc.) or mark location are used in identification.

The accompanying drawing explanation

Fig. 1 is stereo appearance figure of the present utility model;

Fig. 2 is three-dimensional exploded view of the present utility model;

The three-dimensional exploded view that Fig. 3 is another visual angle of the utility model;

Fig. 4 is the side cutaway view before the utility model assembling;

Side cutaway view when Fig. 5 is the utility model assembling;

Fig. 6 is the side cutaway view after the utility model assembling;

The side cutaway view that Fig. 7 is the utility model preferred embodiment;

The side cutaway view that Fig. 8 is another preferred embodiment of the utility model;

Fig. 9 is the utility model side cutaway view of a preferred embodiment again.

Description of reference numerals: 1-sleeve; The 11-perforation; 111-holds face; The 12-positioning part; The 121-annular supports body; The 1211-joint surface; The 122-locating column; The 1221-annular ditch groove; 13-encircles protuberance; 131-ejection face; The 132-stop surface; The 2-fixed element; The 21-head; The 211-bottom surface; The 212-actuating part; The 213-interface; The 22-shaft; The 23-joining portion; The 231-outside thread; 24-annular stop part; The 241-supporting surface; The 25-elastic element; The 26-outer sleeve; The 260-containing space; The 261-fixed groove; The 3-plate body; The 31-hole; The 32-scolder.

Embodiment

For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, hereby draw and illustrate with regard to preferred embodiment of the present utility model that in detail its structure is as follows with function, in order to understanding fully.

Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, be respectively the three-dimensional exploded view at stereo appearance figure of the present utility model, three-dimensional exploded view, another visual angle, the side cutaway view while assembling front side cutaway view, assembling and the side cutaway view after assembling, can know and find out in figure, the utility model includes sleeve 1 and fixed element 2, wherein:

The hollow inside of this sleeve 1 has vertical perforation 11, and be provided with positioning part 12 in perforation 11 places, below, this positioning part 12 is formed with annular outwardly and supports body 121 and support body 121 places by annular and extend the hollow locating column 122 that external diameter is less, and locating column 122 outer surfaces are provided with an annular ditch groove 1221, and the perforation 11 top peripheral regions of sleeve 1 are formed with the face that holds 111 of smooth shape outwardly, this holds face 111 and is formed with adjacent to perforation 11 places the ring protuberance 13 of tiltedly stretching shape, and be formed with respectively ejection face 131 and stop surface 132 in the place of both side surface up and down of ring protuberance 13.

This fixed element 2 has the head 21 that is positioned at sleeve 1 place, top, and be provided with to downward-extension in 211 places, head 21 bottom surface and penetrate the shaft 22 in 11 and the joining portion 23 of shaft 22 belows in perforation, and these shaft 22 D outer diameter are to be greater than the standard pitch diameter d(at joining portion 23 as Fig. 7, Fig. 8, shown in Fig. 9), and on the joining portion 23 of fixed element 2, better enforcement has outside thread 231, but when practical application, also can be provided with two relative longitudinal sections and be positioned at below the side without longitudinal section position the stop block (not shown) of locating to be formed with protrusion at joining portion 23 outer surface positions, make fixed element 2 there is the function of screw or spinner part by outside thread 231 or the stop block at joining portion 23.

Moreover, the shaft 22 of fixed element 2 is formed with adjacent to 23 places, joining portion the annular stop part 24 that external diameter is greater than shaft 22 external diameters outwardly, its annular stop part 24 is formed with the supporting surface 241 of smooth shape adjacent to the lateral surfaces of shaft 22, and be arranged with elastic element 25 on shaft 22, and these elastic element 25 external diameters are less than head 21 and are slightly larger than the external diameter of annular stop part 24; In addition, head 21 surfaces of fixed element 2 are provided with the actuating part 212 that can be cross recess, interior hexagonal groove, rice word groove, hexagon projection or other various types, and are formed with in head 21 periphery places the interface 213 that can be a plurality of double wedges, embossing face, positioning convex point or other tool anti-slip effect.

When the utility model in when assembling, first elastic element 25 to be sheathed on to sleeve 1 outside, and after making elastic element 25 1 ends be held in sleeve 1 to be positioned at annular that 12 of positioning parts form outwardly and to support on body 121, the shaft of fixed element 2 22 is penetrated downwards in the perforation 11 of sleeve 1 inside again, the other end of its elastic element 25 just can elasticity supports to arrive in 211 places, head 21 bottom surface and is the resiliently deformable displacement, make elastic element 25 between the head 21 of the positioning part 12 of sleeve 1 and fixed element 2, and treat shaft 22 adjacent to the annular stop part 24 at 23 places, joining portion by the formed shape ring protuberance 13 of tiltedly stretching of the 11 top peripheral regions of boring a hole, recycling pressurizing mold (not shown) with the impact style punching press on head 21, and make head 21 bottom surface 211 places ejections on the ejection face 131 of ring protuberance 13, make its generation distortion and aperture dwindle, and make the ejection face 131 that encircles protuberance 13 hold face 111 formation one coplanars with the smooth shape of perforation 11 top peripheral regions, and be formed with gap between the shaft 22 of this fixed element 2 and the ring protuberance 13 of sleeve 1, to avoid forming the situation generation of blocking because ring protuberance 13 buckles cause fixed element 2 and sleeve 1 on shaft 22, just can support to arrive in 211 places, head 21 bottom surface by elastic element 25 elasticity, and interlock annular stop part 24 supporting surfaces 241 are held in the stop surface 132 formation block location of ring protuberance 13, effectively to prevent that fixed element 2 from emerging in sleeve 1 outside, and then make fixed element 2 and sleeve 1 present the activity mated condition.

Please arrange in pairs or groups and consult Fig. 7, Fig. 8, shown in Fig. 9, be respectively the side cutaway view of the utility model preferred embodiment, the side cutaway view of another preferred embodiment reaches the side cutaway view of a preferred embodiment again, can know and find out in figure, fixing device of the present utility model is applied to telecommunication bureau's rack, computer server, work table or other tool machine plate group, drawer, keyboard frames etc. are organized on the equipment or device formed, when sleeve 1 with plate body 3 during in assembling, hole 31 places that first positioning part of sleeve 1 12 are aligned with to plate body 3, recycling stamping jig (not shown) with the impact style punching press on head 21, after being squeezed, its elastic element 25 just can be a resiliently deformable displacement, and the smooth shape in sleeve 1 perforation 11 top peripheral regions holds on face 111 by head 21 bottom surface 211 places ejections, just can related hole 31 places that the locating column of positioning part 12 122 are riveted on to plate body 3 downwards, hole 31 places that also can utilize the annular ditch groove 1221 on locating column 122 outer surfaces that the positioning part of sleeve 1 12 is packed in to plate body 3 are combined into one.

It is only a kind of state of preferably implementing that the positioning part 12 of the utility model sleeve 1 utilizes riveting method to be combined into one with the hole 31 of plate body 3, also can utilize the suction nozzle of suction means (not shown) to be adsorbed on head 21 surfaces of fixed element 2 has been got, and related by the positioning part of sleeve 1 12, be to penetrate downwards in the hole 31 of plate body 3 with locating column 122, can be released to by suction nozzle the head 21 of fixed element 2, and after making annular support joint surfaces 1211 that body 121 laterally forms towards 122 of locating columns to be held on the scolder 32 that the place brush covers around hole 31, the weld job that just can utilize the reflow machine (not shown) to carry out follow-up heating to scolder 32, or be combined into one via hole 31 places that plate body 3 is located in the firm weldering in positioning part 12 that makes sleeve 1 after zinc-plated.

And in the process of sleeve 1 welding, just can support to arrive in 211 places, head 21 bottom surface in fixed element 2 by elastic element 25 elasticity, and interlock annular stop part 24 is held on ring protuberance 13 stop surfaces 132 of sleeve 1 and forms the block location, and because the outside thread 231 at joining portion 23 can not be held on ring protuberance 13, after can guaranteeing fixed element 2 rising resiliences, shaft 22 is difficult in the central shaft position producing skew or rocking, make whole center of gravity keep stable, and there is the function of head 21 leveling, being beneficial to the subsequent aspiration device has got while carrying out weld job more accurate by the head of fixed element 2 21, when joining portion 23 deflections that also can prevent fixed element 2 are locked, the generation type becomes and can't carry out smoothly interlocking, or even the outside thread 231 that causes joining portion 23 collapses the situation generation of tooth or fracture, and then reach and improve that surface mount technology (SMT) mode is welded or the quality of interlocking operation and yield and reach the effectiveness reduced costs.

When the utility model when using, first plate body 3 places, bottom surface to be resisted against on another plate body (not shown), and the hole 31 that makes plate body 3 is aligned with the lockhole of another plate body, just can press on head 21 extruding elastic elements 25 downwards and be a resiliently deformable displacement, and because being sheathed on sleeve 1 outside, elastic element 25 can not be subject to the restriction in position and space, can increase elastic element 25 elasticity and support to arrive in the elastic displacement stroke in fixed element 2, and in the situation that reducing, sleeve 1 whole height still can provide fixed element 2 enough resilience strength, make elastic element 25 be difficult for occurring that stress is concentrated or the problem of the elastic fatique derivative permanent deformation of institute or shortening in working life, also can keep the suitable pre-power of elasticity and can not produce excessive deformation or structural damage.

And in the process that fixed element 2 is pressed, its joining portion 23 just can be piercing in perforation 11 places of sleeve 1, and by the joining portion of fixed element 2 23 be with outside thread 231 in advance interlocking in the lockhole of another plate body after, recycling electric tools or hand tools (as screwdriver or spanner etc.) drive in the joining portion of shaft 22 belows 23 fast locks and turn for butting up against actuating part 212 on head 21, just can be held in by 211 places, head 21 bottom surface of fixed element 2 sleeve 1 perforation 11 top peripheral regions makes sleeve 1 coordinate plate body 3 closely to be resisted against on another plate body, and make plate body 3 and another plate body utilize the fixing mode of interlocking to be combined into one, also can conveniently plate body 3 and another plate body rapid-assembling or dismounting be formed to locking or separated state, and because shaft 22 D outer diameter of fixed element 2 are the standard pitch diameter d that is greater than joining portion 23, can increase the torsion strength that lock while turning at head 21 drive shafts 22 and joining portion 23, to avoid because of the situation generation of the fixed element 2 not enough institute of the overall construction intensity shafts that caused 22 adjacent to the joining portion excessive generation slight crack of 23 place's shearing or fracture, and then reach structural stability, assemble firm and locate certain effectiveness.

Yet, can be further combined with outer sleeve 26 is arranged on the head 21 of above-mentioned fixed element 2, and be formed with containing space 260 in outer sleeve 26 inside, and be positioned at containing space 260 tops and be provided with fixed groove 261, just the head of fixed element 2 21 can be utilized plastics so that the mode of imbedding ejaculation is one-body molded outer sleeve 26 to be arranged, or the interface 213 at head 21 periphery place and the fixed groove 261 of outer sleeve 26 utilize the mode of assembling to be combined location, can cover in sleeve 1 and elastic element 25 outsides and prevent that foreign matter from entering by outer sleeve 26, the effect that there is protection to guarantee its normal usage function, and make elastic element 25 be hidden in that outer sleeve 26 inside can not be exposed and integral body is more attractive in appearance, and also can there is the word of particular color on outer sleeve 26 surfaces, pattern, numeral, mark, symbol etc., be beneficial to the position of identification use function (as locking or dismounting etc.) or mark location etc.

Above-mentioned detailed description is for a kind of preferably possible embodiments explanation of the utility model, yet this embodiment is not in order to limit claim of the present utility model, all other do not break away from the equalization completed under the skill spirit that the utility model discloses to be changed and modifies change, all should be contained in the scope of the claims that the utility model contains.

In sum, the above-mentioned fixing device of the utility model is for really reaching its effect and purpose, therefore the utility model is really the creation of a practicability excellence, meet in fact the application important document of new patent, file an application in whence in accordance with the law, expect that examining committee grants accurate the utility model early, to ensure inventor's arduous creation, if an ancient unit of weight office have any check doubtful, the indication of please writing to us without sparing, settled the doing one's utmost of inventor coordinates, and the true feeling moral just.

Claims (10)

1. a fixing device, is characterized in that, includes sleeve and fixed element, wherein:

The hollow inside of this sleeve has perforation, and is provided with the positioning part at the hole place that is positioned default plate body in place, perforation below, and perforation top peripheral region is formed with the ring protuberance of tiltedly stretching shape;

This fixed element has and is positioned at sleeve top place ejection and makes to encircle protuberance in the ring protuberance and produce the head that distortion and aperture dwindle, and be provided with the shaft that penetrates in perforation and the joining portion of shaft below to downward-extension in head bottom surface place, and the shaft of fixed element is formed with outwardly to be held on the ring protuberance adjacent to joining portion place and carries out the annular stop part of block location, and be arranged with on shaft and be positioned at the elastic element that is the resiliently deformable displacement between sleeve and fixed element.

2. fixing device as claimed in claim 1, it is characterized in that, the perforation top peripheral region of this sleeve is formed with the face that holds of smooth shape outwardly, and the ring upper and lower both side surface of protuberance place is formed with respectively for head bottom surface place's ejection of fixed element and forms a coplanar ejection face and support the stop surface that forms thereon the block location for annular stop part with the face of holding.

3. fixing device as claimed in claim 1, it is characterized in that, the positioning part of this sleeve is formed with annular outwardly and supports body, and the annular that on the fixed element shaft, sheathed elastic element one end is held in positioning part supports on body, and support to arrive in the place, head bottom surface of fixed element and be the resiliently deformable displacement by elastic element the other end elasticity.

4. fixing device as claimed in claim 3, is characterized in that, the annular of this sleeve positioning part supports the body place and extends a hollow locating column, and the external diameter of this hollow locating column is less than the external diameter that annular supports body, and is provided with annular ditch groove in the locating column outer surface.

5. fixing device as claimed in claim 3, it is characterized in that, the annular of this sleeve positioning part supports the body place for extending a hollow locating column, and the external diameter of this hollow locating column is less than the external diameter that annular supports body, and supports body in annular and be formed with a joint surface towards the lateral surfaces of locating column.

6. fixing device as claimed in claim 1, is characterized in that, on the joining portion of this fixed element, has outside thread, and the shaft external diameter is the standard pitch diameter that is greater than joining portion.

7. fixing device as claimed in claim 1, it is characterized in that, the external diameter of the annular stop part of this fixed element is greater than the shaft external diameter, and is formed with adjacent to the lateral surfaces of shaft the supporting surface that carries out the block location on the ring protuberance that is held in sleeve in annular stop part.

8. fixing device as claimed in claim 1, it is characterized in that, the head surface of this fixed element is provided with the actuating part of cross recess, interior hexagonal groove, rice word groove or hexagon projection, and is formed with the interface of a plurality of double wedges, embossing face or positioning convex point in head periphery place.

9. fixing device as claimed in claim 8, it is characterized in that, on the head of this fixed element, utilize assembling mode to be combined with outer sleeve, and be formed with the containing space covered in sleeve and elastic element outside in outer sleeve inside, and be positioned at the containing space top and be provided with in conjunction with the fixed groove be positioned on the interface of fixation element head.

10. fixing device as claimed in claim 8, is characterized in that, utilizes on the head of this fixed element to imbed that shoot mode is one-body molded outer sleeve, and be formed with the containing space covered in sleeve and elastic element outside in outer sleeve inside.

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