CN2651501Y

CN2651501Y - Assembled screw

Info

Publication number: CN2651501Y
Application number: CN 03274356
Authority: CN
Inventors: 黄金发; 杨鹏; 陈琼英
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2003-09-05
Filing date: 2003-09-05
Publication date: 2004-10-27
Anticipated expiration: 2013-09-05

Abstract

The utility model relates to a combined screw for fixing and connecting two plates, which comprises a screw and a screw cap for sleeved in the screw. Wherein the screw comprises a screw head, a lug boss and a screw rod. The top of the screw head is provided with a matching groove which can be used in conjunction with a tightening tool. The lug boss is arranged between the screw head and the screw rod, and the external circumference of the lug boss is provided with a plurality of longitudinal grooves. The screw cap is a hollow cylinder sleeved in the lug boss of the screw, a holding space is formed between the screw cap and the screw rod, and the end edge of the screw cap can be contacted and pressed on one of the two plates. The combined screw has the advantages of the easy processing, the convenient use and the good drop-proof and loose-proof effects.

Description

SEM screw SEM Scr

[technical field]

The utility model is about a kind of SEM screw SEM Scr, refer in particular to a kind ofly be easy to process, easy to use, the loosening effective SEM screw SEM Scr of Drop-proof.

[prior art]

Traditional plate connects, for example circuit board group is contained on the base plate or side plate of computer housing,, normally rivets a double-screw bolt at the base plate or the side plate of computer housing for ease of dismounting and saving space, cooperate with this double-screw bolt by screw then, circuit board is fixed in this computer housing.

As shown in Figure 1, a screw 900 is used for fixing and connects one first plate 100 and one second plate 200.This first plate 100 is provided with an opening (not label).Riveted joint one double-screw bolt 300 is provided with tapped hole 310 in this double-screw bolt 300 in this second plate 200, and this double-screw bolt 300 can pass the opening of this first plate 100 and screw with this screw 900, thereby this first plate 100 and second plate 200 link together.But, because first plate 100 and second plate 200 all are light sheet materials, the length of this double-screw bolt 300 is subjected to certain limitation, make this screw 900 shorter with these double-screw bolt 300 screwing lengths, therefore cause being connected between this first plate 100 and second plate 200 not to be very firm, cause easily come off loosening.

In addition, as shown in Figure 2, this double-screw bolt 300 that extends ', can increase double-screw bolt 300 ' with the length of thread engagement of screw 900, thereby reach connect between first plate 100 and second plate 200 more solid and reliable and.But, this double-screw bolt 300 ' will protrude out this first plate, 100 surfaces, when screw 900 screw in these double-screw bolts 300 ' tapped hole 310 ' after, this screw 900 fails to be pressed on this first plate 100.Owing to exist at interval between the face that compresses of screw 900 and this first plate 100, still can cause becoming flexible between first plate 100 and second plate 200, can't reach good fixedly connected.

[summary of the invention]

The purpose of this utility model is to provide a kind of and is easy to process, easy to use, the loosening effective SEM screw SEM Scr of Drop-proof.

SEM screw SEM Scr of the present utility model is to be used for fixing to connect two plates, comprises that a screw and is sheathed on the nut of this screw.This screw comprises a spiral shell head, a boss and a screw rod.The top of this spiral shell head is provided with the mating groove that can match with screwing tool and use.This boss is arranged between this spiral shell head and this screw rod, and its outer periphery are provided with some pods.This nut is one to be set in the hollow cylinder of the boss of this screw, and forms a containing space between this screw rod, and the ora terminalis of this nut can contact and be pressed on wherein on the plate.

The containing space that forms between the nut of the utility model SEM screw SEM Scr and the screw and the ora terminalis of this nut can contact and compress a wherein plate, make the firm and reliable connection between the plate.SEM screw SEM Scr of the present utility model have be easy to process, the loosening effective advantage of easy to use, Drop-proof.

[description of drawings]

The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is that conventional screw connects the user mode of plate with reference to figure one.

Fig. 2 is that conventional screw connects the user mode of plate with reference to figure two.

Fig. 3 is the three-dimensional exploded view of the utility model SEM screw SEM Scr.

Fig. 4 is the three-dimensional combination figure of the utility model SEM screw SEM Scr.

Fig. 5 is the sectional view of Fig. 4.

Fig. 6 is the user mode reference drawing that the utility model SEM screw SEM Scr connects plate.

[embodiment]

Please consult Fig. 3 and Fig. 6 simultaneously, the utility model SEM screw SEM Scr 80 is to be used for connecting one first plate 10 and one second plate 20.This SEM screw SEM Scr 80 comprises that a screw 40 and is mounted on the nut 50 of this screw 40.

Offer one first opening 11 in this first plate 10.

Corresponding one second opening 21 of offering in this second plate 20.Can rivet a double-screw bolt 30 that protrudes out these second plate, 20 surfaces in this second opening 21.Establish a tapped hole 31 in this double-screw bolt 30.

This screw 40 comprises a spiral shell head 41 and one and these spiral shell head 41 screw rods 43 connected vertically.Form the boss 42 of a diameter between this spiral shell head 41 and this screw rod 43 greater than these screw rod 43 diameters.The periphery of this boss 42 is provided with some pods 44.This screw rod 43 is provided with the outside thread that can screw mutually with the tapped hole 31 of this double-screw bolt 30.The top of this spiral shell head 41 is provided with a mating groove 45 that can be used with a turn instrument (as screwdriver etc.).This mating groove 45 is hexagon.

Please consult Fig. 4 and Fig. 5 simultaneously, this nut 50 is hollow cylinders, and formation one can engage the shoulder hole 51 of this screw 40 in it.The outer wall of this nut 50 is big stepped of top handle.This nut 50 can closely be sheathed on the boss 42 of this screw 40, and and this screw rod 43 between form a containing space.This containing space can be used for accommodating this double-screw bolt that is riveted on this second plate 20 30.The pod 44 of this boss 42 can prevent that this nut 50 from rotating relative to this boss 42.The root edge of this nut 50 is provided with some projectioies 52 of radially arranging, can compress these first plate, 10 surfaces of contact.

During connection, this double-screw bolt 30 is riveted in second opening 21 of this second plate 20 earlier, and passes 10 mouthful of first opening 11 of this first plate, first plate 10 is placed on second plate 20.The screw rod 43 of this SEM screw SEM Scr 80 screws in the tapped hole 31 of this double-screw bolt 30, and acts on the mating groove 45 of this SEM screw SEM Scr 80 by a screwdriver, thereby this first plate 10 and this second plate 20 are fixed together.Simultaneously, the projection 52 of these nut 50 bottoms contacts and is pressed on this first plate 10.Because this double-screw bolt 30 can protrude out this first plate 10 and be contained in the containing space of this SEM screw SEM Scr 80, thereby increased the screwing length of this double-screw bolt 30 with this SEM screw SEM Scr 80; In addition, the projection 52 of these nut 50 bottoms can be pressed on this first plate 10.This SEM screw SEM Scr 80 can be with this first plate 10 and 20 solid and reliable and difficult loosening being fixed together of second plate.

Claims

1. SEM screw SEM Scr, in order to fixedly connected two plates, comprise a screw, this screw comprises a spiral shell head and a screw rod, it is characterized in that: this screw comprises further that also one is arranged on the boss between this spiral shell head and this screw rod, and this SEM screw SEM Scr further comprises a nut, this nut is one to be provided with the hollow cylinder of shoulder hole, can be sheathed on the boss of this screw, and and this screw rod between form a containing space, the bottom of this nut can contact and press on wherein on the plate.

2. SEM screw SEM Scr as claimed in claim 1 is characterized in that: the diameter of this boss is greater than the diameter of this screw rod.

3. SEM screw SEM Scr as claimed in claim 2 is characterized in that: the periphery of this boss is provided with some can formation with the shoulder hole of this nut and closely cooperates, and can prevent the pod that nut rotates relative to this boss.

4. SEM screw SEM Scr as claimed in claim 3 is characterized in that: the bottom of this nut radially is provided with some projectioies.

5. SEM screw SEM Scr as claimed in claim 4 is characterized in that: the outer wall of this nut is to be up-small and down-big stepped.

6. SEM screw SEM Scr as claimed in claim 5 is characterized in that: the spiral shell head of this screw is provided with the mating groove that can cooperate with screwing tool.

7. SEM screw SEM Scr as claimed in claim 6 is characterized in that: this two plate comprises one first plate and one second plate, and this first plate is established one first opening, and this second plate is established one second opening.

8. SEM screw SEM Scr as claimed in claim 7, it is characterized in that: riveted joint one can pass this first opening and be contained in the double-screw bolt of the containing space of this SEM screw SEM Scr in this second opening, establish a tapped hole that can screw with the screw rod of this SEM screw SEM Scr in this double-screw bolt, the nut of this SEM screw SEM Scr can contact and press on this first plate.