CN2869421Y

CN2869421Y - Adjustable pressure clamp screw

Info

Publication number: CN2869421Y
Application number: CN 200620053922
Authority: CN
Inventors: 谢光雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-17
Filing date: 2006-01-17
Publication date: 2007-02-14
Anticipated expiration: 2016-01-17

Abstract

The utility model relates to adjustable pressure fasten screw, which comprises nut, a cylindrical rod body is arranged below nut, the lower part of rod body has a section of thread, the rod body has spring and stop piece, the middle section of rod body is arranged to limit moving of stop piece, the outside diameter of the middle section is less than outside diameter of rod body. The utility model added the spring and stop piece on screw shaft body, when assembly, the active force of locking object to stop piece can make spring deformed, the restoring force produced by spring deformation acted on the locking object, which can increase the stability between screw and locking object. The utility model can adjust pressure of locking object according to deformation degree of spring.

Description

The adjustable pressure fastening screw

Technical field:

The utility model relates to the screw technical field, specially refers to the adjustable pressure fastening screw, and it has spring and can regulate locking the pressure size of thing by the deformation degree of spring.

Background technique:

Often to use screw in producing, living, especially, in the computer production process, as Fig. 1, with connector 01, PCB02 plate, CPU03, when radiating fin 04 is fixed together successively, for making CPU03 more stable, generally need to use four screws 06, CPU03 is closely contacted with radiating fin 04, and certain pressure is provided, guarantee radiating effect, and do not weigh CPU wounded.If use normal screws, promptly there is thread section the upper end for nut, lower end, because the influence of screw processing technology, both made four screws 06 have the thread section of equal length, can not guarantee completely that CPU03 closely contacts just with radiating fin 04, always can tension or loose excessively, so both can influence radiating effect and also can cause damage CPU03, CPU03 is very accurate chip, and a little damage all may be fatal.

Notification number is that the utility model patent of CN2622460Y discloses a kind of castellated anti-theft screw, it is made up of bolt, nut, spring washer, fluted on the bolt, have on the spring washer and the corresponding projection of bolt upper groove, spring washer is enclosed within on the bolt, and there is castellated locking trough the nut bottom surface.The shortcoming of this technology mainly contains: 1, spring washer can't be movable; When 2, using, rotation screw, spring washer are easy to generate and relatively rotate, and its port can scrape radiating fin and produce the aluminium bits, and then may make the CPU damage or cause the host board scaling loss.

The model utility content:

The purpose of this utility model is to provide a kind of at the deficiencies in the prior art and have spring, can regulate the adjustable pressure fastening screw of pressure size to the locking thing by the deformation degree of spring.

For achieving the above object, the utility model adopts following technological scheme: it comprises nut, the one cylindrical body of rod is arranged under the nut, there is a thread section body of rod lower end, is arranged with spring on the body of rod, is arranged with catch on the body of rod, also form the intermediate section that the restriction catch moves on the body of rod, it can adjust the position height of catch and spring automatically according to the required pressure of locking thing, makes pressure more stable by this dual control.

The external diameter of described intermediate section is less than the external diameter of the body of rod.

The utility model has added spring and catch on screw rod body, during assembling, the locking thing makes spring produce deformation to the active force of catch, and the restoring force that deformation produced of spring reacts on the locking thing, has increased the stability between screw and the locking thing and has given certain pressure.The utility model can be regulated locking the pressure size of thing by the deformation degree of spring.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is to use the scheme of installation when having screw fixation of C PU now;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is a stereogram of the present utility model.

Embodiment:

See accompanying drawing 2,3, the utility model comprises: nut 10, the groove that can process in-line groove or other shape on the nut 10 uses to cooperate screw-driver.There is a cylindrical body of rod 20 nut 10 belows, and there is a thread section 22 body of rod 20 lower ends, and thread section 22 is used for being connected with the outer lock earnest, and the length of thread section 22 can be decided according to different needs.

Be arranged with spring 30 on the body of rod 20, the top of spring 30 and nut 10 offset, so the preferably flat mouth in the top of spring 30 prevents from can scrape nut 10 when spring 30 from rotating, spring 30 can be regulated the compression distance of self automatically according to different pressure sizes.

Be arranged with catch 40 on the body of rod 20, also form the intermediate section 24 that restriction catch 40 moves on the body of rod 20.The utility model adopts and remove one deck with the lathe car on the body of rod 20, promptly forms the intermediate section 24 of an indent on the body of rod 20, and the external diameter of intermediate section 24 is less than the external diameter of the body of rod 20.Catch 40 promptly is set on the intermediate section 24, and it can move up and down on intermediate section 24, but can not break away from intermediate section 24.

Do not scrape catch 40 when spring 30 is rotated, the lower end of spring 30 also is flat mouthful, and is the dextrorotation spring, and catch of the present utility model 40 adopts the harder iron plate of quality to make.

During assembling the utility model screw, earlier spring 30 is placed on the body of rod 20, then catch 40 is enclosed within on the thread section 22, catch 40 once is stamped on the intermediate section 24 with lathe.For catch 40 not being broken and not damaging the body of rod 20, have a breach on the catch 40 in this course, catch 40 can be smoothly by thread section 22 and assemble back catch 40 and can not come off from the body of rod 20.

When fixed connector 01, PCB02 plate, CPU03, radiating fin 04, use the utility model screw, with the thread section 24 of four screws all fully lock advance in the screw hole on the connector 01, radiating fin 04 roof pressure catch 40, make spring 30 produce bigger deformation, and then CPU03 and radiating fin 04 are more closely sticked together; And in the process of installing, owing on each screw spring 30 is arranged all, so when locking each screw successively, can not damage CPU03 by pressure, effect is preferable.

The utility model produces pressure stable by the dual control of catch 40 and spring 30 to CPU, makes CPU and radiating fin better contact the better radiating effect of generation, have simple in structure, using effect is preferable.

Certainly, the embodiment of the above, it is preferred embodiments of the present utility model, be not to limit the utility model practical range, so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.

Claims

1, adjustable pressure fastening screw, it comprises nut (10), the one cylindrical body of rod (20) is arranged under the nut (10), there is a thread section (22) body of rod (20) lower end, be arranged with spring (30) on the body of rod (20), it is characterized in that: be arranged with catch (40) on the body of rod (20), also form the intermediate section (24) that restriction catch (40) moves on the body of rod (20).

2, adjustable pressure fastening screw according to claim 1 is characterized in that: the external diameter of intermediate section (24) is less than the external diameter of the body of rod (20).