CN203477000U

CN203477000U - Screw

Info

Publication number: CN203477000U
Application number: CN201320629787.9U
Authority: CN
Inventors: 杨再奎; 吴江华
Original assignee: WUJIANG SCREWTECH PRECISON INDUSTRY Co Ltd
Current assignee: WUJIANG SCREWTECH PRECISON INDUSTRY Co Ltd
Priority date: 2013-10-12
Filing date: 2013-10-12
Publication date: 2014-03-12
Anticipated expiration: 2023-10-12

Abstract

The utility model discloses a screw which is mainly used for fixing a central processing unit on a computer main board. The screw comprises a cap nut, a middle body and a threaded rod, wherein the cap nut, the middle body and the threaded rod are integrally formed. The cap nut comprises an upper end face and a lower end face. The middle body is cylindrical, one end of the middle body is connected to the lower end face of the cap nut, the other end of the middle body is connected with the threaded rod, and the middle body is used for enabling the cap nut to be connected with the threaded rod; a groove is formed in the upper end face of the cap nut in an inward recessed mode and is used for achieving surface-to-surface contact between the head of a screwdriver and the cap nut. According to the screw, surface-to-surface contact between the head of the screwdriver and the groove is achieved so that the screwdriver can be well used in cooperation with the cap nut, and therefore the phenomenon that the screwdriver inclines or the screwdriver is separated from the groove or the screwdriver slips on the cap nut is not prone to happening.

Description

Screw

Technical field

The utility model relates to screwed lock firmware field, especially relates to a kind of screw structural that prevents from occurring when screwdriver from acting on blind nut skidding.

Background technique

On circuit board, some components and parts need to be fixed with screw, such as the central processing unit (CPU) fixed block on computer motherboard and radiator etc.Screw belongs to a kind of lock firmware, can cooperatively interact and use with screw, various parts are combined into an assembly, and can make part easily assembling or dismounting.General screw mainly comprise a blind nut, the intermediate connected with this blind nut and can with the threaded stem of the relative combination of screw.

The upper-end surface of the blind nut using on market now is all designed to plane structure, and directly carries out in the plane the setting of groove.We find in actual use, mating reaction poor effect between plane blind nut and screwdriver.Because screwdriver coordinates when part is fixed at the groove with on blind nut, owing to only having the head of screwdriver to apply active force to blind nut, be contacting of a point and face, so in the process of screwdriver rotation, be easy to the phenomenon that occurs that bottle opener inclination, bottle opener and groove depart from or bottle opener skids on blind nut.

Model utility content

The purpose of this utility model is to overcome the defect of prior art, a kind of screw is provided, is mainly used in the fixing of central processing unit (CPU) on computer motherboard, by blind nut, be set to inner concavity, make can realize well and coordinating between screwdriver and blind nut, be convenient to the fixing of part.

For achieving the above object, the utility model proposes following technological scheme: a kind of screw, it comprises integrated blind nut, intermediate and threaded stem, described blind nut comprises upper-end surface and lower end surface, described intermediate one end is connected on the lower end surface of described blind nut, the other end is connected with described threaded stem, and the upper-end surface of described blind nut caves inward and forms a groove, and described groove comprises bottom plane and circumferential surface.

Preferably, on described bottom plane, be provided with groove, for being used in conjunction with the head of screwdriver.

Described groove is any one in yi word pattern groove, cross groove, rice font groove, or the combination of any two grooves in yi word pattern groove, cross groove, rice font groove.

The diameter of described intermediate is less than the diameter of blind nut, and the diameter of described threaded stem is less than the diameter of described intermediate.

The head of described threaded stem is plane or is taper.

The beneficial effects of the utility model are: the utility model by arranging groove on blind nut, the outer wall of screwdriver head and the internal face of groove are fitted, realized the plane-plane contact of screwdriver head and groove, thereby screwdriver can be used in conjunction with well with blind nut, be difficult for occurring the phenomenon that screwdriver inclination, screwdriver and groove depart from or screwdriver skids on blind nut.

Accompanying drawing explanation

Fig. 1 be in the utility model embodiment groove be yi word pattern and rice the combination of font, the structural representation of the screw that the head of threaded stem is taper;

Fig. 2 is that in the utility model embodiment, groove is that head cross, threaded stem is the structural representation of plane screw;

Reference character: 1, blind nut, 11, upper-end surface, 12, lower end surface, 13, groove, 14, bottom plane, 15, circumferential surface, 16, groove, 2, intermediate, 3, threaded stem, 4, chase, 5, the head of threaded stem.

Embodiment

Below in conjunction with accompanying drawing of the present utility model, the utility model embodiment's technological scheme is carried out to clear, complete description.

As shown in Figure 1, a kind of screw that the utility model discloses, is mainly used in the fixing of central processing unit (CPU) on computer main frame panel.Comprise integrated blind nut 1, intermediate 2 and threaded stem 3, described blind nut 1 comprises 11He lower end surface, upper-end surface 12, and described intermediate 2 is cylindric, and one end is connected on the lower end surface 12 of described blind nut 1, the other end is connected with described threaded stem 3, for accepting described blind nut 1 and described threaded stem 3.

On the upper-end surface 11 of described blind nut 1, cave inward and form a groove 13, for the head of screwdriver is wrapped in described groove 13, realize the head of screwdriver and the plane-plane contact between blind nut 1.

Described groove 13 comprises bottom plane 14 and circumferential surface 15, on described bottom plane 14, be provided with the groove 16 cooperatively interacting with screwdriver head, described groove 16 can be any one in the groove of yi word pattern groove, cross groove, rice font groove or other shapes, or the groove of two kinds of shapes combination arbitrarily in multiple groove, the bottle opener that can to realize with head be arbitrary shape is used in conjunction with.

Described circumferential surface 15 is equivalent to a guardrail, when the head correspondence of screwdriver is inserted into groove 16 when interior, now the internal face of the outer wall of screwdriver head and circumferential surface 15 fits, screwdriver is carried out to a well clamping, thereby prevent in process that bottle opener tightens in rotation, occur skidding, with the generation of the phenomenon such as groove dislocation.

One end near described threaded stem 3 on described intermediate 2 is provided with chase 4, for being used in conjunction with some latch closures (such as E shape latch closure), zero firmware is fixed.

The outer surface of described threaded stem 3 is shape of threads, for part on screw be connected.

The diameter of described blind nut 1, intermediate 2 and threaded stem 3 is ladder-type to be reduced gradually, and the diameter of described intermediate 2 is less than the diameter of blind nut 1, and the diameter of described threaded stem 3 is less than the diameter of described intermediate 2.

The head of described threaded stem 3 is plane or is taper.

Technology contents of the present utility model and technical characteristics have disclosed as above; yet those of ordinary skill in the art still may be based on teaching of the present utility model and announcements and are done all replacement and modifications that does not deviate from the utility model spirit; therefore; the utility model protection domain should be not limited to the content that embodiment discloses; and should comprise various do not deviate from replacement of the present utility model and modifications, and contained by present patent application claim.

Claims

1. a screw, it comprises integrated blind nut, intermediate and threaded stem, described blind nut comprises upper-end surface and lower end surface, described intermediate one end is connected on the lower end surface of described blind nut, the other end is connected with described threaded stem, it is characterized in that: the upper-end surface of described blind nut caves inward and forms a groove, and described groove comprises bottom plane and circumferential surface.

2. screw according to claim 1, is characterized in that, on described bottom plane, is provided with groove.

3. screw according to claim 2, is characterized in that, described groove is any one in yi word pattern groove, cross groove, rice font groove, or the combination of any two grooves in yi word pattern groove, cross groove, rice font groove.

4. screw according to claim 1, is characterized in that, the diameter of described intermediate is less than the diameter of blind nut, and the diameter of described threaded stem is less than the diameter of described intermediate.

5. screw according to claim 1, is characterized in that, the head of described threaded stem is plane or is taper.