CN201491437U

CN201491437U - fixing fastener

Info

Publication number: CN201491437U
Application number: CN2009201681457U
Authority: CN
Inventors: 谢秋菊
Original assignee: Kangyang Plastics & Rubber (dongguan) Co Ltd
Current assignee: Kangyang Plastics & Rubber (dongguan) Co Ltd
Priority date: 2009-08-31
Filing date: 2009-08-31
Publication date: 2010-05-26
Anticipated expiration: 2019-08-31

Abstract

The utility model relates to a fixing fastener, which comprises a coak and a spring, wherein the coak is provided with a cylinder, the top end and the bottom end of the cylinder are convexly provided with a rod head and an arrow-shaped barb respectively, the inner side of the barb is provided with at least one expansion joint, the intersection position of the cylinder and the rod head is annularly provided with a locating ring of which the outer diameter is greater than that of the cylinder, and the intersection part of the locating ring and the cylinder below the locating ring is provided with an annular inclined plane; and the top end of the spring is sleeved and clamped on the locating ring along the guidance of the annular inclined plane, and the middle section and the lower section of the spring are sleeved on the cylinder above the barb to ensure that the spring cannot fall off from the coak.

Description

Fixedly use fastener

Technical field

The utility model is relevant a kind of fastener, refers to a kind of fin and power chip of being snapped in especially, and for example CPU's fixedly uses fastener.

Background technology

Press the function of fastener, be combination and location between object, and preferably can different objects be separated again for triping in not intending combination.Certainly, the use prerequisite of fastener, be necessary for and respectively desire the object that fastened, for example fin and circuit board for example all are provided with button hole, wear the back for the embedding of fastener and fasten, make power chip, for example the CPU end face is adjacent to this fin bottom securely, and the heat energy that this CPU is distributed can be assisted heat radiation by this fin.

Be the locating effect that fin and the circuit board formation that is provided with power chip are combined closely, a sheathed flexible member, for example spring on the cylinder of fastener usually.When the overhead kick of fastener bottom was snapped in the default button hole of circuit board, this spring was to be positioned between the film perforation of this fastener head and fin, and is compressive state.This measure can overcome the difference because of the fastener size, makes this make fin and power chip can keep the effect that fits tightly.Therefore, spring had become the indispensable necessary element of fastener already, yet this spring inside diameter tightly is slightly less than the maximum outside diameter of this fastener bottom overhead kick, and this overhead kick has the function of elasticity convergent-divergent, so that the collision that this fastener is produced when transporting, and spring and fastener are broken away from, and then cause inconvenience and puzzlement when assembling.

Based on aforementioned fastener and the easy shortcoming that breaks away from of spring, " the fixture structure improvement of CPU radiating fin " as No. 587756 patent case of TaiWan, China patent announcement, as shown in Figure 1, this fixture structure comprises that a press members 10 and a flexible member 20 form.These press members 10 upper ends are provided with a compression part 101, it extends a cylinder 102 downwards, this cylinder bottom forms a hook portion 103, this hook portion is that a bottom is circular-arc and by the upwardly extending upside-down triangle shape of bottom two sides, this hook portion 103 2 sides upper end is provided with tongue piece 104, and these cylinder 102 bottoms and 103 of hook portions are provided with groove 105.Wherein, these cylinder 102 side face appropriate locations are provided with a plurality of stopper section 106, and it can make this flexible member 20 be difficult for coming off from press members 10 for the fixing of elasticity element 20.

No doubt this case to increase this cylinder 102 external diameters, so that supply the fixing of this flexible member 20, because stopper section 106 is to adopt a plurality of salient point settings, so that when fixing, often causes the inconvenience of assembling by the setting of a plurality of stopper section 106.In addition, the tongue piece 104 that extend hook portion 103 both sides of these press members 10 bottoms is not connected with cylinder 102, and is open shape, this open arrow sagittal appearance often when loading, causes distortion easily, even the facts of fracture takes place, be a fly in the ointment really, and demand urgently improving.

The utility model content

The utility model main purpose is to provide a kind of fixing fastener of using, but the coak ammunition feed spring of this fastener guide apace and clamping, make that spring is unlikely to come off from coak, and make fastener have preferable loading capacity.

For reaching aforesaid purpose, the technological means that the utility model is taked provides a kind of fixing fastener of using, and it comprises:

One coak, it has a cylinder, the prominent respectively overhead kick of establishing a bar head and an arrow sagittal of this cylinder top and bottom ends, at least one expansion joint is offered in this overhead kick inboard; Wherein, the delivery position ring of this cylinder and bar head is established the locating ring of an external diameter greater than cylinder, and this locating ring is provided with an annular slope with the junction of following square body; And

One spring, its top be along the guiding of annular slope, makes this spring top socket and be clamped on the locating ring, in this spring, hypomere then is sheathed on the cylinder of overhead kick top.

Wherein this upper end, overhead kick both sides inner edge respectively is connected in cylinder with a connecting piece, makes this overhead kick form the arrow sagittal of a sealing.

Wherein the expansion joint of the arrow sagittal overhead kick inboard of this sealing is to be oppositely arranged.

Wherein this expansion joint is trapezoidal appearance.

Wherein this spring is isometrical or the taper elastomer.

The utility model also provides a kind of fixing fastener of using, and it is characterized in that it comprises:

One coak, it has a cylinder, the prominent respectively overhead kick of establishing a bar head and an arrow sagittal of this cylinder top and bottom ends, at least one expansion joint is offered in this overhead kick inboard; Wherein, the delivery position ring of this cylinder and bar head is established the locating ring of an external diameter greater than cylinder, offer a location groove on this locating ring circumference, and the junction of this locating ring and following square body is provided with an annular slope; And

One spring, its top be along the guiding of annular slope, makes this spring top socket and be clamped in the detent of locating ring, in this spring, hypomere then is sheathed on the cylinder of overhead kick top.

Wherein this expansion joint is trapezoidal appearance.

Wherein this spring is isometrical or the taper elastomer.

The beneficial effects of the utility model are: but the coak ammunition feed spring of this fastener guide apace and clamping, make that spring is unlikely to come off from coak, and make fastener have preferable loading capacity.

Description of drawings

For further disclosing concrete technology contents of the present utility model, at first see also accompanying drawing, wherein:

Fig. 1 is the three-dimensional exploded view of known fastener;

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

Fig. 3 is the schematic diagram of the utility model group after upright;

Fig. 4 is assemblied in the profile of fin and circuit board for the utility model fastener;

Fig. 5 is the three-dimensional exploded view of the utility model fastener second embodiment;

Fig. 6 is the schematic diagram after the utility model second embodiment group is stood.

Embodiment

As shown in Figures 2 and 3, basically, fastener of the present utility model is by a coak 1, and a spring 2 combines.

Wherein, coak 1 is by the plastics ejection formation, the prominent bar head 12 of establishing in its circular cylinder 11 tops, the bottom then is the overhead kick 13 of an arrow sagittal, at least one expansion joint 14 is offered in its inboard, and two expansion joints 14 that relatively are provided with for example make the function of these overhead kick 13 tool elastic dilatations and compression.Wherein, each is connected in cylinder 11 with a connecting piece 15 this upper end, overhead kick 13 both sides inner edge, this two expansion joint 14 that is provided with is relatively enclosed form trapezoidal appearance, because this overhead kick 13 forms the arrow sagittal of sealing, so that when this overhead kick 13 is stressed, by these brace 15 formed connection effects, make the not yielding and damage of this overhead kick 13, thereby increase loading capacity.

And for chat after providing spring 2 tops can be sheathed with clamping (tight fit) in cylinder 11, be with, this cylinder 11 is established the bigger locating ring of an external diameter 16 with the delivery position ring of bar head 12, its junction with following square body 11 is provided with the setting of an annular slope 161, it is the guiding for these spring 2 tops, makes this spring 2 tops socket successfully and is clamped on the locating ring 16.

Spring 2 be for one extensible and the compression isometrical elastomer, its epimere is to be socketed in the detent 162 of cylinder 11 top locating rings 16, fixing to form, in this spring 2, hypomere then is sheathed on the cylinder 11 of overhead kick 13 tops, the shown in Figure 3 group of fastener after upright put by 11 of this spring 2 can be obtained elasticity and support to arrive in effect.

See also Fig. 4, the utility model is the film perforation 31 that the back-off 13 of fastener is passed fin 3 when assembling, the button hole 41 of alignment circuit plate 4 inserts then, two relative expansion joints 14 of back-off 13 are out of shape for button hole 41 compressions, and by expansion immediately behind this button hole 41, thereby the buckle state formed.At this moment, these spring 2 tops are to be clamped in the detent 162 of cylinder 11 top locating rings 16, and the bottom supports in fin 3.

Fig. 5 and shown in Figure 6, it is the three-dimensional exploded view of the utility model fastener second embodiment and the group schematic diagram after upright, and be to form better locating effect, offer a location groove 162 on these locating ring 16 circumference, but these detent 162 ammunition feed springs 2, being inserted in of taper elastomer top (small-bore) for example to increase the effect that combines of this spring 2 and coak 1, makes both difficult drop-offs.

So via enforcement of the present utility model, the effect that it gained is, by the setting on this locating ring base circle inclined-plane, will help spring guiding and this locating ring of clamping that internal diameter is slightly less than the locating ring external diameter, to form stable locating effect.Especially, if this locating ring is established being inserted in of groove ammunition feed spring top, a location in addition, more can increase the effect that combines of this spring and coak.Especially, the overhead kick of this coak bottom is the arrow sagittal of sealing, can increase the structural strength of this overhead kick, except that not yielding, and can increase the loading effect effectively, can be rated as a ware big good structure not seen before.

That the utility model disclosed is a kind of of preferred embodiment, the change of every part or modification and come from technological thought of the present utility model and be have the knack of this technology the people was easy to know by inference, all do not take off claim category of the present utility model.

Claims

1. fixing use fastener for one kind, it is characterized in that it comprises:

2. the fixing fastener of using as claimed in claim 1 is characterized in that, wherein this upper end, overhead kick both sides inner edge respectively is connected in cylinder with a connecting piece, makes this overhead kick form the arrow sagittal of a sealing.

3. the fixing fastener of using as claimed in claim 2 is characterized in that, wherein the expansion joint of the arrow sagittal overhead kick inboard of this sealing is to be oppositely arranged.

4. the fixing fastener of using as claimed in claim 3 is characterized in that wherein this expansion joint is trapezoidal appearance.

5. the fixing fastener of using as claimed in claim 1 is characterized in that wherein this spring is isometrical or the taper elastomer.

6. fixing use fastener for one kind, it is characterized in that it comprises:

7. the fixing fastener of using as claimed in claim 6 is characterized in that, wherein this upper end, overhead kick both sides inner edge respectively is connected in cylinder with a connecting piece, makes this overhead kick form the arrow sagittal of a sealing.

8. the fixing fastener of using as claimed in claim 7 is characterized in that, wherein the expansion joint of the arrow sagittal overhead kick inboard of this sealing is to be oppositely arranged.

9. the fixing fastener of using as claimed in claim 8 is characterized in that wherein this expansion joint is trapezoidal appearance.

10. the fixing fastener of using as claimed in claim 6 is characterized in that wherein this spring is isometrical or the taper elastomer.