CN209180176U

CN209180176U - Captive fastener

Info

Publication number: CN209180176U
Application number: CN201790000568.0U
Authority: CN
Inventors: 洪準皓; 罗小平
Original assignee: Southco Inc
Current assignee: Southco Inc
Priority date: 2016-02-03
Filing date: 2017-02-03
Publication date: 2019-07-30
Anticipated expiration: 2027-02-03
Also published as: TWM552060U; KR20180103677A; WO2017136670A1

Abstract

The embodiment of the utility model is related to captive fastener comprising the stud (100) with head (110) and the axis (120) extended from head.Axis (120) has fastener portion (140) and locating snap ring attached thereto (400).Ring (300) is limited along the channel that the longitudinal axis of ring extends.Stud (100) is arranged in the channel of ring (300) and can be mobile relative to ring (300).The close end of ring (300) has the inward flange (322) extended towards stud (100).The inward flange (322) of the close end of ring (300) engages locating snap ring (400) when being positioned in stud (100) relative to ring (300) displacement.The inward flange (322) of ring (300) is configured to reduce the misalignment of the longitudinal axis of the longitudinal axis of ring (300) and stud (100).Locating snap ring (400) be configured to reduce ring (300) longitudinal axis and stud (100) longitudinal axis stud (100) axis (120) remote end part misalignment.

Description

Captive fastener

The cross reference of pertinent literature

This application claims enjoy in entitled " captive fastener (the CAPTIVE FASTENER) " that submits on 2 3rd, 2016 U.S. Provisional Application No. 62/290,682 equity and its priority, for various purposes, content is by quoting entirety It is incorporated herein.

Technical field

This disclosure relates to captive fastener, and more particularly, to being tethered at plunger (captive plunger) and be tethered at spiral shell It follows closely (captive screw).

Background technique

Such as mooring screw and the captive fastener for being tethered at plunger etc are normally used for the first plate being attached to the second plate Or frame, appropriate location is desirably held the fastener in herein without loosening hardware.For example, captive fastener can be pacified It fills on the first panel, even so that fastener completely disengages attached by the first plate at fastener (such as screw thread of helical axis) When the second plate, also remain attached on plate.

Captive fastener can be used for electronics industry.In some applications, when opening or removal door or lid and these doors Or behind lid when dangerous voltage, government regulation may require using a tool to open or removing door or lid.However, being Facilitate worker, it may also be desirable to can manually tighten captive fastener.

Utility model content

The embodiment of the utility model is related to captive fastener and its application.

According to a scheme, the utility model provides a kind of for being attached to the captive fastener of plate.Captive fastener Generally include stud, stud have head and along stud longitudinal axis extend to from head stud distal end axis.The axis With fastener portion.Locating snap ring is attached on the axis of stud and is spaced apart with the distal end of stud.The captive fastener further includes Ring (ferrule), the ring limit the channel for extending to the distal end of ring from the proximal end of ring along the longitudinal axis of ring. Stud is arranged in the channel of ring, and can be moved along the longitudinal axis of stud relative to ring.The close end of ring Inward flange with the longitudinal axis extension towards stud.It is opposite that the inward flange of the close end of ring is positioned at stud Locating snap ring is engaged when ring displacement.The inward flange of ring is configured to reduce the longitudinal axis of ring and the longitudinal axis of stud Misalignment of the line at the close end of the axis of stud.Locating snap ring is configured to reduce the longitudinal axis of ring and the longitudinal axis of stud Misalignment of the line in the remote end part of the axis of stud.

According to another program, the utility model provides a kind of captive fastener, with stud, the stud include head and The axis of the distal end of stud is extended to from head along the longitudinal axis of stud.The axis has fastener portion.Captive fastener also wraps Locating snap ring is included, which is attached to the axis of stud and is spaced apart with the distal end of stud.Captive fastener further includes knob, the rotation Button has the flange to extend internally and limits the hole for extending to the distal end of knob from the proximal end of knob.The head of stud is at least partly Ground is arranged in the hole limited by knob.Captive fastener further includes ring, the ring limit along ring longitudinal axis from The proximal end of ring extends to the channel of the distal end of ring.Stud is arranged in the channel of ring, and can be along the vertical of stud It is mobile relative to ring to axis.There is the close end of ring export-oriented flange and inward flange, the extroversion flange to be positioned at Stud engages when being displaced relative to ring with the flange of knob to extend internally, and the inward flange is towards the longitudinal axis of stud Extend.The inward flange of ring engages locating snap ring when being positioned at stud relative to ring displacement.The inward flange quilt of ring Misalignment of the longitudinal axis of the longitudinal axis and stud that are configured to reduction ring at the close end of the axis of stud.Locating snap ring quilt Be configured to reduce ring longitudinal axis and stud longitudinal axis stud axis remote end part misalignment.

Detailed description of the invention

When read in conjunction with the accompanying drawings, the utility model can be best understood from the following detailed description.Traditionally, it removes Non- to be otherwise noted, otherwise the various features of attached drawing are not drawn to scale.On the contrary, for the sake of clarity, can expand or Reduce the size of various features.Include following figure in attached drawing:

Fig. 1 is the perspective view of the embodiment of the captive fastener of scheme according to the present utility model, captive fastener tool There is the ring that extended position is in relative to knob；

Fig. 2 is the cross-sectional view for being attached to the captive fastener of Fig. 1 in retracted position of the first plate and the second plate；

Fig. 3 is the exploded view of the captive fastener of Fig. 1；

Fig. 4 A is the perspective view of the stud of the captive fastener of Fig. 2；

Fig. 4 B is the side view of the stud of Fig. 4 A；

Fig. 4 C is the top view of the stud of Fig. 4 A；

Fig. 4 D is the bottom view of the stud of Fig. 4 A；

Fig. 5 is the perspective view of another embodiment of the captive fastener of scheme according to the present utility model, this is tethered at fastening Part has the ring that extended position is in relative to knob；

Fig. 6 is the cross-sectional view for being attached to the captive fastener of Fig. 5 in retracted position of the first plate and the second plate；

Fig. 7 is the exploded view of the captive fastener of Fig. 5；

Fig. 8 is the perspective view of the stud of the captive fastener of Fig. 7；

Fig. 9 A is the first perspective view of the ratchet of the captive fastener of Fig. 7；

Fig. 9 B is the second perspective view of the ratchet of Fig. 9 A；

Figure 10 is the perspective view of the C-spring of the captive fastener of Fig. 7；

Figure 11 A is the first perspective view of the ring of the captive fastener of Fig. 7；

Figure 11 B is the second perspective view of the ring of Figure 11 A；And

Figure 12 is the cross-sectional view of the ring of Figure 11 A.

Specific embodiment

Although illustrate and describing the utility model herein with reference to specific embodiment, the utility model is not limited to institute The details shown.It, can be in the scope of the claims and equivalency range to thin but in the case where not departing from the utility model Section carry out various modifications.

Captive fastener can be in various reinforcing occasions to link two or more objects.As an example, being tethered at fastening Part is commonly used in lid being attached to surface and/or plate and frame.Although herein in regard to plate is linked or is begged for fixed to frame By the embodiments of the present invention, it will be recognized to those skilled in the art that can be advantageously employed captive fastener by Other objects or feature connection are fixed together.Captive fastener according to the present utility model can link or be attached to one Or in multiple objects, captive fastener will not be made to separate with all objects so that unclamping captive fastener relative to an object.

Referring generally to attached drawing, captive fastener 10 generally includes stud 100, and stud 100 includes head 110 and axis 120, Axis 120 extends to the distal end 104 of stud 100 from head 110 along the longitudinal axis 102 of stud 100.Axis 120 has fastener Portion 140.Locating snap ring 400 is attached to the axis 120 of stud 100 and is spaced apart with the distal end of stud 100 104.Knob 200 limits hole 204, the head 110 of stud 100 is at least partially disposed in the hole limited by knob 200.Ring 300 limits channel 304； Channel 304 extends to the distal end 306 of ring 300 from the proximal end of ring 300 320 along the longitudinal axis 302 of ring 300；And Stud 100 is arranged in the channel 304 of ring, and can be moved relative to ring 300 along the longitudinal axis 102 of stud 100. The close end 320 of ring 300 has inward flange 322, and the longitudinal axis 102 of inward flange 322 towards stud 100 extends.Ring The inward flange 322 of the close end 320 of circle 300 is positioned at when stud 100 is displaced relative to ring 300 and engages locating snap ring 400.The inward flange 322 of ring 300 is configured to reduce the longitudinal axis 302 of ring 300 and the longitudinal axis of stud 100 102 misalignment at the close end 124 of the axis 120 of stud 100.Locating snap ring 400 is configured to reduce the longitudinal axis of ring 300 Misalignment of the longitudinal axis 102 of line 302 and stud 100 at the distal portion 126 of the axis 120 of stud 100.

With reference to Fig. 1, one embodiment according to the present utility model, captive fastener 10 is arranged to be used for being attached to plate On.As overview, captive fastener 10 includes stud 100, knob 200, ring 300 and locating snap ring 400.

Stud 100 has longitudinal axis 102, and thus distal end 104 is spaced apart along the longitudinal axis 102 with proximal end 106.Spiral shell Column 100 further includes head 110 and the axis 120 from the extension of head 110.

Head 110 at appended drawing reference " 112 " have limit as circle, square, triangle, hexagon, octagon or The cross-sectional area of geometry as other geometries.Although the cross-sectional area at appended drawing reference " 112 " limits edge The circle at each point of longitudinal axis 102, as shown in Fig. 2, but the cross-sectional area at appended drawing reference " 112 " can also limit The non-geometrically of axis 102 along longitudinal direction.For example, head 110 is constructed with non-geometrically, and therefore may be used With non-geometric cross-sectional area.Additionally or alternatively, cross-sectional area 112 can be along the longitudinal axis 102 of stud 100 Variation.For example, head 110 may include protrusion 114, protrusion 114 has cross-sectional area 116, and the cross-sectional area 116 is extremely It is different from the cross-sectional area 112 on head 110 in a few dimension.Similarly, head 110 may include recess portion or recess, recessed The cross-sectional area of portion or recess is different from the cross-sectional area 112 on head 110 at least one dimension.As begged for further below Opinion, head 110 is constructed with protrusion 114 and/or recess, protrusion and/or recess by one of knob 200 or Multiple corresponding protrusions, recess and/or flange are fixed.

With reference to Fig. 2, head 110 limits the driving section 118 being located at the proximal end 106 of stud 100.However, according to a reality Example is applied, the head 110 of stud 100 does not limit driving section 118.Driving section 118 may be constructed such that cavity and/or protrusion, have The head 110 for helping stud 100 is engaged with tool, and stud 100 can be made to rotate by the rotation of tool in this way.For example, passing Dynamic portion 118 can be extended internally from the proximal end of stud 100 106 to limit cavity, or is extended outwardly to limit protrusion.Driving section 118 can be configured to engagement have for example Philip tip, the tip cross recess F type (Frearson), the tip star (Torx), The tool of square tip, notch tip or other types tool.

Stud 100 includes axis 120, and longitudinal axis 102 of the axis 120 from head 110 along stud 100 extends to stud 100 Distally 104.Although in the embodiment shown in fig. 3, axis 120 has substantial cylindrical shape, axis 120 can also have it His geometry (for example, rectangle, triangle or other geometries) or including one or more straight line portions and/or rounded portions The non-geometrically divided.Axis 120 include close end 122 and distal portion 126, wherein distal portion 126 compared with head 110 with it is close End 122 is spaced apart farther.

Axis 120 further includes fastener portion 140, fastener portion 140 be constructed such that stud 100 be securable to one or Multiple objects, such as plate 12 and 14.Fastener portion 140 may include with path (minor diameter) 144 and major diameter (major diameter) 147 Screw thread.Additionally or alternatively, fastener portion 140 may include one or more grooves and/or protrusion, groove and/or convex It rises and is configured to engage one or more objects, such as joint plate 12 and 14.According to one embodiment, fastener portion 140 has At least one vertical extending flute and another groove extending therefrom at a certain angle, so that captive fastener 10 is constructed One or more objects are fastened at when stud 100 rotates a quarter circle, such as are fastened to plate 14.Although in Fig. 2-Fig. 4 B In, fastener portion 140 is spaced apart with the distal end 104 of stud 100, and fastener portion 140 extends to distal end 104.In addition, fastening Part portion 140 extends to head 110.For example, in one embodiment, fastener portion 140 is from 104 edge of the distal end of stud 100 Axis 120 extends to head 110.

The distal portion 126 of axis 120 can be spaced apart or extend to the distal end 104 of stud 100 with the distal end 104 of stud 100. Additionally and/or alternatively, fastener portion 140 may be disposed in the distal portion 126 of axis 120.Distal portion 126 has cross section Area 128, the cross-sectional area 128 can be different from the cross-sectional area 124 of close end 122 of axis 120.For example, distal portion 126 cross-sectional area 128 or its diameter can be less than the cross-sectional area 124 or its diameter of the close end 122 of axis 120.

In one embodiment, along fastener portion 140, the cross-sectional area 128 or its diameter of distal portion 126 are less than proximal end The cross-sectional area 124 or its diameter in portion 122；And along the part between close end 122 and fastener portion 140 of axis 120, Then the cross-sectional area 128 or its diameter of distal portion 126 are equal to the cross-sectional area 124 of close end 122 equal or approximate to ground.Root It include another embodiment of screw thread according to fastener portion 140, the cross-sectional area 128 of distal portion 126 can be equal to or less than fastening The path 144 of the screw thread in part portion 140.

Distal portion can also limit shoulder portion 130, and shoulder portion 130 is suitable for carrying locating snap ring such as locating snap ring 400.For example, In one embodiment, shoulder portion 130 includes the optional annular knurl or other surfaces feature suitable for being attached locating snap ring.Shoulder portion 130 cross-sectional area 132 can be different from the cross-sectional area 128 of distal portion 126.For example, the cross section face in shoulder portion 130 Product 132 can be less than the cross-sectional area 128 of the part between shoulder portion 130 and close end 122 of distal portion 126, make Locating snap ring is obtained to be prevented from sliding past shoulder portion 130 along axis 120 headward 110.

Axis 120 can also have guide portion 150, and guide portion is remote with fastener portion 140 between the distal end of stud 100 104 Between end 148.Guide portion 150 can be configured to facilitate fastener portion 140 and be aligned with one or more objects, for example, with The fastener portion of matching board is aligned.If fastener portion 140 includes screw thread, the cross-sectional area 152 of guide portion 150 be can be equal to Or less than the cross-sectional area 146 of fastener portion 140 and/or the path 144 of screw thread.Additionally or alternatively, guide portion 150 Cross-sectional area 152 or its diameter can be less than or equal to the cross section of the cross-sectional area 128 of distal portion 126, close end 122 Any diameter of area 124, and/or distal portion 126 and close end 122.

Captive fastener 10 further includes locating snap ring 400, locating snap ring 400 be attached to the axis 120 of stud 100 and with stud 10 Distally 104 it is spaced apart.For example, locating snap ring 400 can be attached to axis 120 along distal portion 126 and/or shoulder portion 130.Locating snap ring 400 can mechanically (such as press-fit, crimping, welding, threaded connection, wedging etc.) or non-mechanical means be (such as logical Cross smearing adhesive etc.) it is attached to axis 120.According to one embodiment, pass through the annular knurl being arranged along shoulder portion 130, locating snap ring 400 The movement of axis 120 relative to stud 100 is eliminated or inhibits.In another embodiment, locating snap ring 400 is stud 100 The one of axis 120 extends.Locating snap ring 400 can extend towards ring 300.In one embodiment, locating snap ring 400 can be optional Ground is configured to contact ring 300.

Captive fastener 10 further includes knob 200, and knob 200 can have to be aligned with the longitudinal axis 102 of stud 100 Longitudinal axis.Knob 200 limits hole 204.The head 110 of stud 100 is at least partly arranged on the hole limited by knob 200 In 204.In one embodiment, the hole 204 of knob 200 extends to the proximal end 208 of knob 200 from the distal end of knob 200 206. In another embodiment, the hole 204 of knob 200 from the distal end of knob 200 206 extend to knob 200 between distal end 206 with That a part between proximal end 208, so that the proximal end 106 of stud 100 is screwed 200 encirclements.

The head 110 of stud 100 can be maintained in the hole 204 of knob 200, enable head 110 in hole 204 Mobile and/or rotation.However, in one embodiment, head 110 is maintained in head 110 with being fixed formula, so that head 110 is fixed relative to knob 200.For example, head 110 is maintained in head 110 in which can be fixed formula, so that knob 200 is along one The rotation in a direction causes stud 100 to rotate in one direction, and the rotation of knob 200 in opposite direction causes stud 100 It rotates in mutually opposite directions.As shown in Fig. 2, the protrusion 114 on head 110 can pass through the respective recesses 210 and knob of knob 200 200 proximal flange 212 and inner flange 214 are fixedly kept.In general, head 110 can pass through any suitable guarantor Mode is held, is maintained in the hole 204 of knob 200.Alternatively, the one that knob 200 can be stud 100 extends, for example, spiral shell The head 110 of column 100 may be constructed such that the function of structure and/or knob 200 including knob 200, for example, be configured to by User grasps.For example, in one embodiment, it may be desirable to stud 100 is configured to integrally comprise knob 200, wherein Axis is kept with being fixed formula relative to knob portion.Knob 200 can have ring 300 or part of it, and ring 300 or its A part is arranged in the hole 204 of knob 200.Captive fastener 10 also includes ring 300, which limits channel 304；Channel 304 extends to the distal end 306 of ring 300 from the proximal end of ring 300 308 along the longitudinal axis 302 of ring 300. Stud 100 or part of it are arranged in the channel 304 of ring 300, and can along stud 100 longitudinal axis 102 relative to Ring 300 is mobile.Ring 300 has close end 320 and distal portion 310.The distal portion 310 of ring 300 and/or distal end 306 can To include plate attachment device.For example, distal portion 310 and/or distal end 306 may be constructed such that mechanically (such as from riveting Connect, crimping, welding, screw thread, wedging etc.) and/or non-mechanical means (such as by smearing adhesive etc.) be attached to plate.

The close end 320 of ring 300 includes inward flange 322.The inward flange 322 of close end 320 can be with ring 300 Proximal end 308 is spaced apart.The longitudinal axis 102 of inward flange 322 towards stud 100 extends.According to one embodiment, inward flange 322 extend to engagement shaft 120 or part of it, such as extend to the close end 122 of engagement shaft 120.In the axis along longitudinal direction of stud 100 Line 102 relative to ring 300 be displaced when, the inward flange 322 of the close end 320 of ring 300 be oriented directly (for example, Pass through contact) or indirectly (for example, by mediate contact, such as by compressing, spring 330 until the load on spring 330 Until equaling or exceeding displacement force) engagement locating snap ring 400.As shown in Fig. 2, the inward flange 322 of close end 320 is by by spring 330 compressions to engage locating snap ring 400 indirectly, until the load on spring 330 equals or exceeds displacement force or until interior Until failing under this displacement force to any one of flange 322 or locating snap ring 330.Therefore, locating snap ring 330 passes through flange Engagement is to engage indirectly, and in this indirect engagement, spring prevents from directly contacting.Alternatively, it is also contemplated that directly engaging, example Such as by eliminating spring or reconfiguring locating snap ring 330 and/or flange 322 to allow directly to contact.The introversion of close end 320 is convex Ring 100 or part of it (such as axis 120) can be maintained at the logical of ring 300 by the engagement between edge 322 and locating snap ring 400 In road 304.For example, engaging the inward flange 322 of ring 300 in locating snap ring 400 when ring 300 is attached to plate 12 and/or 14 In the case where, stud 100 can be prevented from after a certain distance along the displacement of the longitudinal axis 102 of stud 100.In a reality It applies in example, after stud 100 is displaced certain distance, stud 100 is prevented from along the displacement of the longitudinal axis 102 of stud 100, spring Load on 330 is equal to displacement force, so that the inward flange 322 of ring 300 engages locating snap ring 400 indirectly.

The inward flange 322 of ring 300 may be configured as reducing the longitudinal axis 302 and stud 100 of ring 300 The misalignment of longitudinal axis 102.For example, the inward flange 322 of ring 300 extends to axis 120, to limit stud 100 Displacement of the axis 120 on the direction transverse to the longitudinal axis 302 of ring 300.According to one embodiment, inward flange 322 It is configured to, when captive fastener 10 is in its contraction state, reduces the longitudinal axis 302 of ring 300 and indulging for stud 100 To misalignment of the axis 102 at the close end 122 of axis 120.Contraction state includes the rotation when ring is retracted in the hole of knob Position of the button relative to ring.

According to another embodiment, inward flange 322 is configured to, and when captive fastener 10 is in its extended state, is subtracted The misalignment of the longitudinal axis 302 of few ring 300 and the longitudinal axis 102 of stud 100 at the distal portion 126 of axis 120.Stretching, extension State includes position of the knob relative to ring when ring is stretched out from the hole of knob.In another embodiment, inward flange 322 are constructed such that the longitudinal axis 302 of ring 300 is coaxially aligned with the longitudinal axis 102 of stud 100.

The close end 320 and/or inward flange 322 of ring 300 can be configured to limit notch, which makes from spiral shell The one or more protrusion or convex block that the axis 120 of column 100 extends can extend there through.In one embodiment, for example, in order to make The protrusion or convex block extended from axis 120 is mobile by channel 304 at the inward flange 322 of ring 300, extends from axis 120 Protrusion or convex block are aligned with the notch limited by close end 320 and/or inward flange 322.According to another embodiment, stud is rotated 100 so that from the protrusion of the extension of axis 120 or the notch misalignment of convex block and close end 320, thus by preventing 100 phase of stud Captive fastener 10 is maintained at extended position by the displacement for ring 300, to prevent captive fastener 10 from being moved to contraction Position.

Spring 330 is preferably disposed in the channel 304 of ring 300.Close end 320 of the spring 330 in ring 300 Extend between inward flange 322 and locating snap ring 400.Spring 330 can be compressed spring, and can push the interior of ring 300 To flange 322 and backup locating snap ring 400.For example, spring 330 may be constructed such that captive fastener 10 is pressed to it is contraction-like State, thus when ring 300 is attached to object, stud 100 is pushed to one or more objects.Although spring 330 is in Fig. 2 and figure Compressed spring is shown as in 3, but in the other embodiments of the utility model, spring 330 can also be except compressed spring it Outer spring.For example, stretching bullet can be used in captive fastener 10 when ring 300 is attached on one or more plates Spring, captive fastener 10 is pushed into extended state by the way that stud 100 is pushed away one or more objects.

Locating snap ring 400 can be configured to reduce the longitudinal axis 102 of the longitudinal axis 302 of ring 300 and stud 100 Misalignment.When captive fastener 10 is in contraction state, locating snap ring 400 can reduce the longitudinal axis 302 and spiral shell of ring 300 Misalignment of the longitudinal axis 102 of column 100 at the distal portion 310 of ring 300.When captive fastener 10 is in extended state When, locating snap ring 400 can reduce the longitudinal axis 302 of ring 300 and the longitudinal axis 102 of stud 100 in the proximal end of ring 300 Misalignment at portion 320.In one embodiment, locating snap ring 400 is constructed such that the longitudinal axis 302 and stud of ring 300 100 longitudinal axis 102 is coaxially aligned.According to another embodiment, the axis 120 of stud 100 is in the longitudinal direction transverse to ring 300 Displacement on the direction of axis 302 is limited by locating snap ring 400.

Referring to Fig. 5 to Fig. 7, captive fastener 20 is shown, there is the knob for rotating stud 100' in one direction 200'.Only for the convenience of reader, retouched using appended drawing reference similar with the appended drawing reference for describing captive fastener 10 State the feature of captive fastener 20.It should be understood that captive fastener 10 and 20 is non-limiting exemplary embodiment, because This, the claim of the utility model is not limited to diagram or respective drawings discussed in this article label in attached drawing.

As overview, captive fastener 20 includes stud 100', knob 200', ring 300' and locating snap ring 400'. In addition, captive fastener 20 is configured to, so that the rotation of knob 200' in one direction is configured to enclose stud 100' Longitudinal axis 102' around stud 100' rotates, and the rotation of knob 200' in the opposite direction is not configured to make stud edge The opposite direction of the longitudinal axis 102' of stud 100' rotates.

Referring to Fig. 6 to Fig. 8, there is the stud 100' of captive fastener 20 longitudinal axis 102', distal end 104' to pass through longitudinal direction Axis 102' is spaced apart along above-mentioned longitudinal axis 102' with proximal end 106'.Stud 100' further includes head 110' and from head The axis 120' that 110' extends.Locating snap ring 400' is attached to the axis 120' of stud 100'.

Captive fastener 20 also there is knob 200', knob 200' can have 102' pairs of longitudinal axis with stud 100' Quasi- longitudinal axis.Knob 200' limits hole 204', and hole 204' extends to the close of knob 200' from the distal end 206' of knob 200' Hold 208'.The head 110' of stud 100' is at least partly arranged in the hole 204' limited by knob 200'.Preferably, spiral shell Column 100' is arranged in the 204' of hole, so that the driving section 118' of stud 100' is exposed and/or can be approached by tool.Knob 200' It can have one or more flanges, such as proximal flange 212' and distal end flange 216'.As shown in fig. 6, head 110''s is convex Playing 114' can be kept by one or more flanges of knob 200', so that stud 100' is removably affixed, it is thus impossible to It is displaced relative to knob 200' along the longitudinal axis 102' of stud 100', but can be relative to knob 200' around stud 100''s Longitudinal axis 102' rotation.

Captive fastener 20 further includes ratchet device 500', and ratchet device is arranged in the hole 204' of knob 200'.Spine Wheel apparatus 500' may include one or more ratchet 510' and at least one pawl 520'.Although embodiment shown in Fig. 9 In, one or more ratchet 510' are arranged on ratchet 512', but one or more ratchet 510' can be arranged on stud One of 100' or knob 200' are upper, and/or are attached to one of stud 100' or knob 200'.For example, in a reality It applies in example, one or more ratchet 510' are that the one of stud 100' or knob 200' extends.

Pawl 520' may be constructed such that a part of C-spring 522' or C-spring 522'.According to Figure 10 Embodiment, C-spring 522' have driving section 524', head of the driving section 524' for example by being maintained at stud 100' In the recess 115' limited in the raised 114' of 110', and it is attached to stud 100'.Additionally or alternatively, pawl 520' can quilt It is arranged on the other of stud 100' or knob 200', and/or is attached to the other of stud 100' or knob 200'. According to one embodiment, pawl 520' is that the one of stud 100' or knob 200' extends.One or more ratchet 510' can be with Directly or indirectly engaged with pawl 520'.

Pawl 520' for example can be by engaging one or more ratchet 510' when knob 200' rotates in one direction simultaneously And do not engage one or more ratchet 510' when knob 200' is rotated in mutually opposite directions, and stud 100' is configured to allow for exist One side is rotated upward around longitudinal axis 102'.Therefore, in one embodiment, due between ratchet 510' and pawl 520' Engagement, the rotation of knob 200' in one direction make stud 100' rotate, knob 200', which is rotated in mutually opposite directions, to be made Stud 100' rotation.In another embodiment, stud 100' includes driving section 118', and stud 100' can be by rotating knob 200', and/or rotatable drive 118', and rotate in one direction, stud 100' can only pass through rotatable drive 118' Rotate in the opposite direction.

According to another embodiment, captive fastener 20 is configured to manually tighten, but once being manually tightened Tool is needed to unclamp.The ratchet device for being applicable to captive fastener 20 is described in U.S. Patent No. 5,642,972 Additional example, entire contents are integrally incorporated herein by way of quoting.

Referring to Figure 11 A to Figure 12, captive fastener 20 further includes ring 300'；Ring 300' is limited along ring 300''s Longitudinal axis 302' extends to the channel 304' of the distal end 306' of ring 300' from the proximal end 308' of ring 300'.Stud 100' Or part of it is arranged in the channel 304' of ring 300', and can along stud 100' longitudinal axis 102' relative to Ring 300' is mobile.The distal portion 310' and/or distal end 306' of ring 300' can have plate attachment device.

It includes inward flange 322' and export-oriented flange 324' that ring 300', which has close end 320', close end 320',.It is introversive Flange 322' and/or extroversion flange 324' can be spaced apart with the proximal end 308' of ring 300'.Inward flange 322' is towards stud The longitudinal axis 102' of 100' extends.When axis 102' is mobile relative to ring 300' along longitudinal direction by stud 100', ring 300' The inward flange 322' of close end 320' be oriented directly (for example, passing through contact) or indirectly (such as by indirect Contact, such as by compressing, spring 330' until the load on spring 330' equals or exceeds displacement force) engagement stop Ring 400'.Engagement between the inward flange 322' and locating snap ring 400' of close end 320' can be by ring 100' or part of it (such as axis 120') is maintained in the channel 304' of ring 300'.For example, when ring 300' is attached to plate 12' and/or 14', In the inward flange 322' of locating snap ring 400' engagement ring 300', the axial displacement of stud 100' can certain distance it After be prevented from.

The inward flange 322' and extroversion flange 324' of ring 300' can also be configured to reduce the longitudinal direction of ring 300' The misalignment of the longitudinal axis 102' of axis 302' and stud 100'.For example, the inward flange 322' and extroversion of ring 300' are convex Edge 324' can extend respectively into axis 120' and knob 200', to limit the axis 120' of stud 100' transverse to ring 300' Longitudinal axis 302' direction on displacement.According to one embodiment, inward flange 322' and extroversion flange 324' are constructed At, when captive fastener 20 is in contraction state, the longitudinal axis of the longitudinal axis 302' and stud 100' of reduction ring 300' Misalignment of the line 102' at the close end 122' of axis 120'.

The export-oriented flange 324' of ring 300' extends outwardly towards knob 200'.In stud 100' relative to ring 300' When shifting, export-oriented flange 324' can be positioned so as to be engaged with the flange (for example, distal end flange 216') of knob 200' to extend internally. When stud 100' is displaced relative to ring 300', stud 100' or part of it can pass through the export-oriented flange 324' of knob 200' With the engagement of proximal flange 216', and it is maintained in ring 300'.According to one embodiment, export-oriented flange 324' can be engaged The proximal flange 216' of knob 200', because the inward flange 322' of close end 320' engages locating snap ring 400'.

In another embodiment, when the engagement between the inward flange 322' of ring 300' and locating snap ring 400' cannot hinder Only when displacement of the stud 100' relative to ring 300', in the proximal flange of export-oriented the flange 324' and knob 200' of ring 300' It is engaged between 216'.In yet another embodiment, when the proximal flange of export-oriented the flange 324' and knob 200 of ring 300' When engagement between 216' cannot prevent displacement of the stud 100' relative to ring 300', in the inward flange 322' of ring 300' It is engaged between locating snap ring 400'.

Although illustrate and describing the utility model herein with reference to specific embodiment, the utility model is not limited to institute The details shown.But this can be carry out various modifications and not departed to details in the scope of the claims and equivalency range Utility model.

Claims

1. a kind of for being attached to the captive fastener of plate, which is characterized in that the captive fastener includes:

Stud extends to the axis of the distal end of the stud including head and from the head along the longitudinal axis of the stud, The axis has fastener portion；

Locating snap ring is attached to the axis of the stud and is spaced apart with the distal end of the stud；

Knob has the flange to extend internally and limits the hole for extending to the distal end of the knob from the proximal end of the knob, institute The head for stating stud is at least partly arranged in the hole limited by the knob；And

Ring limits the channel that the longitudinal axis along the ring extends to from the proximal end of the ring distal end of the ring, The stud is arranged in the channel of the ring and can move along the longitudinal axis of the stud relative to the ring Dynamic, the close end of the ring includes

Export-oriented flange, is positioned at when the stud is displaced relative to the ring that contact extending internally for the knob convex Edge,

Inward flange extends towards the longitudinal axis of the stud, and the inward flange of the ring is positioned at the stud The locating snap ring is engaged when relative to ring displacement,

Wherein, the inward flange of the ring is configured to reduce the longitudinal axis of the longitudinal axis of the ring and the stud Misalignment at the close end of the axis of the stud, and wherein, the locating snap ring is configured to reduce the vertical of the ring To axis and the stud longitudinal axis the stud axis remote end part misalignment.

2. captive fastener according to claim 1, which is characterized in that the head of the stud limits driving section.

3. captive fastener according to claim 2, which is characterized in that the rotation of the driving section on the head in one direction Turn to be rotated in a first direction the stud, and the rotation of the driving section on the head in opposite direction makes the stud along second Direction rotates, and wherein, and the knob will not be such that the stud revolves along the second direction along the rotation of the opposite direction Turn.

4. captive fastener according to claim 1, which is characterized in that the captive fastener further include: compressed spring, It is arranged in the channel of the ring and extends between the inward flange of the close end of the ring and the locating snap ring, Locating snap ring described in the inward flange of the close end of ring described in the compressed spring backup and backup.

5. captive fastener according to claim 1, which is characterized in that the distal end of the ring has plate attachment device.

6. captive fastener according to claim 1, which is characterized in that the inward flange of the proximal end of the ring is towards institute The longitudinal axis for stating stud extends, to limit the axis of the stud on the direction transverse to the longitudinal axis of the ring Displacement.

7. captive fastener according to claim 1, which is characterized in that the inward flange of the ring and the locating snap ring It is constructed such that the longitudinal axis of the longitudinal axis and the stud of the ring is coaxially aligned.

8. captive fastener according to claim 1, which is characterized in that the rotation of the knob in one direction is by structure It makes to rotate the stud around the longitudinal axis of the stud, and the rotation of the knob in said opposite direction is not It is configured to the longitudinal axis for making the stud surround the stud in said opposite direction rotation.

9. captive fastener according to claim 8, which is characterized in that the captive fastener further include:

One or more ratchets are arranged on one of the stud or the knob；And

Pawl is arranged in the another one of the stud or the knob and can engage with one or more of ratchets；

Wherein, the ratchet is configured to allow for the stud to rotate in one direction around the longitudinal axis of the stud； And

Wherein, when the knob rotates in the one direction, the pawl is engaged with one or more of ratchets, with And wherein, when the knob is rotated along the opposite direction, the pawl is not engaged with one or more of ratchets.

10. captive fastener according to claim 1, which is characterized in that the fastener portion includes screw thread.

11. captive fastener according to claim 1, which is characterized in that the fastener portion of the axis and the stud Distal end is spaced apart.

12. captive fastener according to claim 1, which is characterized in that the axis of the stud has distal portion, described remote The cross-sectional area of end is less than the close end of the axis.

13. captive fastener according to claim 10, which is characterized in that the axis of the stud has distal portion, described The cross-sectional area of distal portion is equal to or less than the path of the cross-sectional area of the screw thread of the fastener portion.

14. captive fastener according to claim 1, which is characterized in that the axis of the stud has between the axis Guide portion between fastener portion and the distal end of the axis, to facilitate the fastener portion pair of the fastener portion and matching board It is quasi-.

15. a kind of for being attached to the captive fastener of plate, which is characterized in that the captive fastener includes:

Ring, limit longitudinal axis along the ring from the proximal end of the ring extend to the ring distal end it is logical Road, the stud are arranged in the channel of the ring and can be along the longitudinal axis of the stud relative to the ring It is mobile；And

The close end of ring, the inward flange that there is the longitudinal axis towards the stud to extend, the close end of the ring Inward flange is positioned at when the stud is displaced relative to the ring and engages the locating snap ring,

16. captive fastener according to claim 15, which is characterized in that the captive fastener further include: limit hole Knob, the head of the stud is at least partly arranged in the hole limited by the knob, wherein the knob has The flange to extend internally, and the close end of the ring has export-oriented flange, and the export-oriented flange of the ring is positioned at The stud contacts the flange of the knob to extend internally when being displaced.

17. captive fastener according to claim 15, which is characterized in that the captive fastener further include: compression bullet Spring is arranged in the channel of the ring and prolongs between the inward flange of the close end of the ring and the locating snap ring It stretches, locating snap ring described in the inward flange of the close end of ring described in the compressed spring backup and backup.

18. captive fastener according to claim 15, which is characterized in that the distal end of the ring has plate attachment dress It sets.

19. captive fastener according to claim 15, which is characterized in that the fastener portion of the stud and the stud Distal end be spaced apart.

20. captive fastener according to claim 15, which is characterized in that the axis of the stud has distal portion, described The cross-sectional area of distal portion is less than the close end of the axis.

21. captive fastener according to claim 15, which is characterized in that the fastener portion includes screw thread.

22. captive fastener according to claim 21, which is characterized in that the axis of the stud has distal portion, described The cross-sectional area of distal portion is equal to or less than the path of the cross-sectional area of the screw thread of the fastener portion.

23. captive fastener according to claim 15, which is characterized in that the axis of the stud, which has, is inserted in the axis Fastener portion and the axis distal end between guide portion, to be conducive to the fastener portion of the fastener portion and matching board Alignment.