CN202023821U

CN202023821U - Screw device

Info

Publication number: CN202023821U
Application number: CN2011201070094U
Authority: CN
Inventors: 康志宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-13
Filing date: 2011-04-13
Publication date: 2011-11-02
Anticipated expiration: 2021-04-13

Abstract

A screw device comprises a fixed piece, a screw, an elastic piece and a limit piece. The fixed piece is provided with a surrounding wall and a protruding portion. The screw comprises a screw head, a bolt formed by extending the bottom end of the screw head and a screw tooth section formed at the tail end of the bolt. The elastic piece is sleeved on the bolt of the screw and ejects the screw to retreat from a first position to a second position. The limit piece is sleeved on the bolt of the screw and positioned between the screw tooth section of the screw and the protruding portion of the fixed piece. When the screw is positioned at the second position, two ends of the limit piece respectively abut against the screw tooth section and the protruding portion of the fixed piece. Therefore the screw tooth section of the screw is retained to penetrate through the fixed piece, and the screw can not be ejected out of the fixed piece by the elastic piece.

Description

Screw device

Technical field

The utility model relates to a kind of screw device, but is meant a kind of screw device of microminiaturization especially.

Background technique

Screw often is used on fixing or the purposes in conjunction with article, still, when article need repairing or move, disassembles the screw that gets off and tumbles easily, if do not collect fixing described screw especially, causes the loss of screw easily.Consult Fig. 1 and Fig. 2, so prior screws device 9, has a fixed block 91, this fixed block 91 is fixed in earlier on these article, screw 92 then is arranged in this fixed block 91, utilizes limiting component 93 that viscose is fixed in these fixed block 91 inner peripheral surfaces allow the screw 92 of removing locked state, still can keep being arranged in this fixed block 91, thus, just can not lose screw 92 again.Existing above-mentioned limiting component 93 is to be made by rubber.

But, the more and more careful and microminiaturization of the design of article, as: the mainboard in the computer.Then, in the past the fixed block 91 of screw device 9 and be arranged at the size of the limiting component 93 in this fixed block 91 certainly will be also and then dwindle.But the limiting component 93 of rubber system will run into two problems in the process of microminiaturization.One is the rubber of microminiaturization, and its thickness also and then diminishes, and can cause the intensity reduction of limiting component 93 and can't limit screw 92 when removing screw 92 locked state, prevents that screw 92 breaks away from this fixed block 91 because of the pushing tow of an elastic component 94.The another one problem is, problem certainly will take place in the limiting component 93 of less thick aspect durability, for example when removing screw 92 locked state, be subjected to screw 92 extrusion-deformations easily and rupture, this can be a problem that the utmost point need improve for originally with regard to the screw device 9 that may need repeatedly to remove locked state.

Summary of the invention

The purpose of this utility model is to provide a kind of screw device of can microminiaturization making.

The utility model screw device comprises: a fixed block, a screw, an elastic component and a limiting component.

This fixed block has a surrounding wall, defines a containing space with two Rather, openings by this surrounding wall, and the inner peripheral surface of this surrounding wall extends to form a protuberance along the direction away from this surrounding wall.

This screw comprises that a spiral shell head, a screw rod and the end by this screw rod that is extended by this spiral shell head bottom form the threaded section with a worm structure, and this screw this fixed block relatively is arranged in the containing space of this fixed block movably.

This elastic component is sheathed on the screw rod of this screw and between the protuberance of this spiral shell head and this fixed block, this this screw of elastic component pushing tow and can make this screw return to a second place from a primary importance.

This limiting component is made by the rigidity material and is hollow and comprises the end opposite of two each self-forming one openings, this limiting component also is sheathed on the screw rod of this screw, and its position is between the protuberance of the threaded section of this screw and this fixed block, this limiting component can move with respect to this fixed block along with this screw, when this screw is positioned at this second place, the two ends of this limiting component are resisted against the protuberance of this threaded section and this fixed block respectively, whereby, can keep the threaded section of this screw to be arranged in the containing space of this fixed block, not cause this screw to be subjected to this elastic component pushing tow and break away from this fixed block.

Preferably, this limiting component has a truncated conelike leg, and the external diameter of this truncated conelike leg is increased to another end opposite gradually by the end of this limiting component near the protuberance of this fixed block.

The beneficial effects of the utility model are: provide one can microminiaturization screw device, designing a limiting component of being made by the rigidity material is sheathed on the screw rod of this screw, this limiting component can with the screw device size dwindle and and then attenuation and diminishing, and keep certain rigidity, break with the mutual friction of the threaded section of avoiding this limiting component and this screw.

Description of drawings

Fig. 1 is a sectional view, and a kind of prior screws device is described;

Fig. 2 is this sectional view of screw device in the past, and the bolt state of this screw device is described;

Fig. 3 is the view sub-anatomy of the utility model screw device one preferred embodiment, and the structure of this screw device is described;

Fig. 4 is this embodiment's a sectional view, illustrates that this screw device is positioned at the bolt state of a primary importance;

Fig. 5 is another sectional view of this embodiment, illustrates that this screw device is positioned at the releasing bolt state of a second place.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated.

Consult Fig. 3 and Fig. 4, the utility model screw device 1 comprises a fixed block 11, a screw 12, an elastic component 13 and a limiting component 14.

This fixed block 11 has a surrounding wall 111, define one by this surrounding wall 111 and have the one first opposite opening 1121 and the containing space 112 of one second opening 1122, the inner peripheral surface of this surrounding wall 111 extends to form a protuberance 113 along the direction away from this surrounding wall 111, and this protuberance 113 is for ring-type and define a passage 1131.This fixed block 11 is to be fixed on the article, and these article have one and desire the female thread structure (figure does not show) that is spirally connected with this screw device 1.

This screw 12 comprises that a spiral shell head 121, a screw rod 122 and the end by this screw rod 122 that is extended by these spiral shell head 121 bottoms form the threaded section 123 with a worm structure 1231, and this screw 12 this fixed block 11 relatively is arranged in the containing space 112 of this fixed block 11 movably.The screw rod 122 of this screw 12 comprises a linkage section 124 and a rod body section 125 that is connected with this linkage section 124 that is extended by these spiral shell head 121 bottoms, and the external diameter of this rod body section 125 is less than the external diameter of this linkage section 124.

This elastic component 13 is sheathed on the screw rod 122 of this screw 12 and between the protuberance 113 of this spiral shell head 121 and this fixed block 11, this this screw 12 of elastic component 13 pushing tows and can make this screw 12 return to a second place from a primary importance.When this screw 12 was positioned at this primary importance, touched to this fixed block 11 spiral shell head 121 bottoms of this screw 12, and when this screw 12 was positioned at this second place, spiral shell head 121 bottoms of this screw 12 were away from this fixed block 11.This elastic component 13 is a pressure spring.

This limiting component 14 is made by the rigidity material and is hollow and comprises an end 141 and another end opposite 142 of two each self-forming one openings.This limiting component 14 also is sheathed on the screw rod 122 of this screw 12, and allows its position between the protuberance 113 of the threaded section 123 of this screw 12 and this fixed block 11.This limiting component 14 has a truncated conelike leg, and the external diameter of this truncated conelike leg is increased to another end opposite 142 gradually by the end 141 of this limiting component 14 near the protuberance 113 of this fixed block 11.

Making this screw device 1 is earlier this elastic component 13 to be sheathed on the screw rod 122 of this screw 12, and the threaded section 123 of this screw 12 plugged towards this fixed block 11 and by first opening 1121 of this fixed block 11 enter in the containing space 112 of fixed block 11 and pass the passage 1131 that this protuberance 113 is defined, again this limiting component 14 is inserted in screw rod 122 in this screw 12 by the threaded section 123 of screw 12, after having overlapped, opening diameter with at least one this limiting component 14 dwindles again, breaks away from from this threaded section 123 to prevent this limiting component 14.

During use, the fixed block 11 of this screw device 1 is fixed on the female thread structure of the article of desiring bolt, promptly finishes the setting of this screw device 1.

Consult Fig. 4, when promoting this screw 12 and axially moving to this primary importance by this second place with respect to this fixed block 11, this screw 12 promptly touches to this female thread structure, this screw 12 of screw lock is when this female thread structure, these screw 12 compressible these elastic components 13 make this elastic component 13 produce an elastic-restoring force.

In addition, when promoting this screw 12 and axially moving to this primary importance by this second place, because these spiral shell head 121 external diameters are greater than the internal diameter of this fixed block 11, the bottom of this spiral shell head 121 is first opening 1121 (consulting Fig. 3) of this fixed block 11 of contact, makes the spiral shell head 121 of this screw 12 keep being revealed in outside this fixed block 11.

Consult Fig. 5, remove after these screw 12 bolt states, this screw 12 is shifted to this screw 12 in the process of this second place by the elastic-restoring force of this elastic component 13 by this primary importance, this limiting component 14 is along with this screw 12 moves with respect to this fixed block 11, when this screw 12 moves to this second place, the protuberance 113 of this threaded section 13 of the two ends of this limiting component 14 contact out of the ordinary and this fixed block 11, whereby, can keep the threaded section 123 of this screw 12 to be arranged in the containing space 112 (consulting Fig. 3) of this fixed block 11, not cause this screw 12 to be subjected to these elastic component 13 pushing tows and break away from this fixed block 11.

In sum, screw device behind the microminiaturization 1 needs the limiting component 14 of a thinner thickness, just can be sheathed on the screw 12 in the containing space 112 of this fixed block 11.Because of this limiting component 14 is made for the rigidity material, still can keep enough hardness after the thickness attenuation, thus, no matter be this screw 12 of screw lock or the screw lock state of removing this screw 12, the threaded section 123 of screw 12 and the friction between this limiting component 14 still do not cause this limiting component 14 to break, and then continue to keep this screw 12 to be arranged in the containing space 112 of this fixed block 11, so can reach the purpose of this utility model really.

Claims

1. a screw device comprises: a fixed block, a screw and an elastic component; It is characterized in that: this fixed block has a surrounding wall, defines a containing space with two opposite openings by this surrounding wall, and the inner peripheral surface of this surrounding wall extends to form a protuberance along the direction away from this surrounding wall; This screw comprises that a screw rod that a spiral shell head, is extended by this spiral shell head bottom and an end by this screw rod form a threaded section with a worm structure, and this screw this fixed block relatively is arranged in the containing space of this fixed block movably; This elastic component is sheathed on the screw rod of this screw and between the protuberance of this spiral shell head and this fixed block, this this screw of elastic component pushing tow and can make this screw return to a second place from a primary importance, this screw device also comprises a limiting component, this limiting component is made by the rigidity material and is hollow and comprises the end opposite of two each self-forming one openings, this limiting component also is sheathed on the screw rod of this screw, and its position is between the protuberance of the threaded section of this screw and this fixed block, this limiting component can move with respect to this fixed block along with this screw, when this screw was positioned at this second place, the two ends of this limiting component were resisted against the protuberance of this threaded section and this fixed block respectively.

2. screw device according to claim 1 is characterized in that: this limiting component has a truncated conelike leg, and the external diameter of this truncated conelike leg is increased to another end opposite gradually by the end of this limiting component near the protuberance of this fixed block.