CN102168708A - Screw - Google Patents
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- CN102168708A CN102168708A CN 201110093085 CN201110093085A CN102168708A CN 102168708 A CN102168708 A CN 102168708A CN 201110093085 CN201110093085 CN 201110093085 CN 201110093085 A CN201110093085 A CN 201110093085A CN 102168708 A CN102168708 A CN 102168708A
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- screw
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Abstract
The invention relates to a screw comprising a screw head (1) and a screw tail (2) with an external thread, wherein the screw head (1) is also provided with a twist object; the upper end face of the twist object is provided with a cross slot (5) or horizontal slot (6); and the torque for twisting the twist object from the screw head (1) is equivalent to that for properly tightening the screw. The screw is characterized in that the upper end face of the screw head (1) is provided with a groove (7), and the twist object is arranged in the groove (7). After the twist object is twisted off, the remaining of the screw stays in the groove, avoiding scratch to human body.
Description
Technical field
The present invention relates to a kind of screw.
Background technique
A kind of screw is arranged in the prior art, comprise screw head, and form externally threaded screw afterbody, also be provided with one on the upper-end surface of screw head and twist off thing, twist off on the upper-end surface of thing and form cross recess or straight groove, and it is suitable with the moment of torsion of tightening screw just from the moment of torsion that screw head twists off to twist off thing.The screw of the prior art can be held screw-down torque well, avoids the screw overtorquing, and the fastening face of connected piece is damaged; Or twist too loosely, screw such as deviates from easily at the generation of situation under the effect of external force.But also have following shortcoming in actual use: 1, twist off on the upper-end surface that thing is arranged on screw head, after twisting off, a part that twists off thing can remain on the upper-end surface of screw head, has so both influenced attractive in appearancely, may cause scratch to human body again.
Summary of the invention
For this reason, technical problem to be solved by this invention is that screw of the prior art can a residual part after twisting off thing and twisting off causes influencing attractive in appearance in the upper-end surface of screw, may cause the problem of scratch again to human body, provide a kind of nubbin that twists off thing can not cause the screw of scratch human body.
For solving the problems of the technologies described above, a kind of screw of the present invention, comprise screw head, and form externally threaded screw afterbody, also be provided with one on the described screw head and twist off thing, form cross recess or straight groove on the described upper-end surface that twists off thing, and to twist off the moment of torsion that thing twists off from described screw head suitable with the moment of torsion of tightening described screw just with described, form a groove on the upper-end surface of described screw head, the described thing that twists off is arranged in the described groove, and the length of described cylindrical tail portion is not more than the degree of depth of described groove.
Described screw, describedly twist off the cylindrical head that thing is successively decreased successively by diameter, the cylindrical midsection branch, and cylindrical tail portion constitutes, described cross recess or straight groove are molded over the upper-end surface of described cylindrical head, described cylindrical tail portion is installed in the described groove, and the length of described cylindrical tail portion is not more than the degree of depth of described groove.
Described cylindrical midsection branch is 3: 1 with the diameter ratio of described cylindrical tail portion.
Describedly twist off the cylindrical head that thing is successively decreased successively by diameter, and conical afterbody constitutes, described cross recess or straight groove are molded over the upper-end surface of described cylindrical head, described conical afterbody is installed in the described groove, and the length of described conical afterbody is not more than the degree of depth of described groove.
The tapering of described conical afterbody is 10-30 °.
Technique scheme of the present invention has the following advantages compared to existing technology, 1, in the present invention, form a groove on the upper-end surface of screw head, twisting off thing is arranged in the groove, can make the residual fraction that twists off thing remain in the groove, and can not protrude the upper-end surface scratch human body of screw head or tangle clothing; Twist off thing and successively decrease successively to the diameter of afterbody from the head, can guarantee to twist off and occur in cylindrical tail portion, the length of cylindrical tail portion is not more than the degree of depth of groove, guarantees to twist off the part that remains in after thing twists off in the groove and does not stretch out in the groove, hurts sb.'s feelings thereby avoid scraping; And twist off the cylindrical head that thing is successively decreased successively by diameter, and conical afterbody formation, can make the place of twisting off as far as possible near bottom portion of groove, thereby make that the nubbin that remains in the groove is few, more attractive in appearance.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the embodiment of the invention 1 plan view;
Fig. 2 embodiment of the invention 2 plan views;
Fig. 3 is the plan view that forms the screw of straight groove of the present invention;
Fig. 4 is the plan view that forms the screw of word groove of the present invention.
Reference character is expressed as among the figure: 1-screw head, 2-screw afterbody, 3-cylindrical head, 4-cylindrical tail portion, 5-cross recess, 6-straight groove, 7-groove, 8-cylindrical midsection branch.
Embodiment
As shown in Figure 1 to Figure 3, a kind of screw of present embodiment 1, comprise screw head 1, and form externally threaded screw afterbody 2, also be provided with one on the described screw head 1 and twist off thing, form cross recess 5 or straight groove 6 on the described upper-end surface that twists off thing, and to twist off thing suitable with the moment of torsion of tightening described screw just from the moment of torsion that described screw head 1 twists off with described, form a groove 7 on the upper-end surface of described screw head 1, the described thing that twists off is arranged in the described groove 7.The setting of described groove 7 can make the described residual fraction that twists off thing remain in the described groove 7, and can not protrude the upper-end surface scratch human body of described screw head 1 or tangle clothing, in the present embodiment, describedly twist off the cylindrical head 3 that thing is successively decreased successively by diameter, cylindrical midsection divides 8, and cylindrical tail portion 4 constitutes, described cross recess 5 or straight groove 6 are molded over the upper-end surface of described cylindrical head 3, described cylindrical tail portion 4 is installed in the described groove 7, and the length of described cylindrical tail portion 4 is not more than the degree of depth of described groove 7.The described thing that twists off successively decreases successively to the diameter of afterbody from the head, can guarantee to twist off and occur in described cylindrical tail portion 4, the length of described cylindrical tail portion 4 is not more than the degree of depth of described groove 7, guarantee that the described parts that remain in after thing twists off in the described groove 7 that twist off do not stretch out in the groove, hurt sb.'s feelings thereby avoid scraping.Described cylindrical midsection divide 8 with the diameter ratio of described cylindrical tail portion 4 be 3: 1.
In the present embodiment, describedly twist off the cylindrical head 3 that thing is successively decreased successively by diameter, and conical afterbody 4 constitutes, described cross recess 5 or straight groove 6 are molded over the upper-end surface of described cylindrical head 3, described conical afterbody 4 is installed in the described groove 7, and the length of described conical afterbody 4 is not more than the degree of depth of described groove 7.The tapering of described conical afterbody is 10-30 °.The setting of described conical afterbody can make the place of twisting off try one's best near described groove 7 bottoms, thereby makes the part that twists off that remains in the described groove 7 lack, and is more attractive in appearance.
Obviously, the foregoing description only is for example clearly is described, is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (5)
1. screw, comprise screw head (1), and form externally threaded screw afterbody (2), also be provided with one on the described screw head (1) and twist off thing, form cross recess (5) or straight groove (6) on the described upper-end surface that twists off thing, and to twist off the moment of torsion that thing twists off from described screw head (1) suitable with the moment of torsion of tightening described screw just with described, it is characterized in that: form a groove (7) on the upper-end surface of described screw head (1), the described thing that twists off is arranged in the described groove (7).
2. screw according to claim 1, it is characterized in that: describedly twist off the cylindrical head (3) that thing is successively decreased successively by diameter, cylindrical midsection branch (8), and cylindrical tail portion (4) constitutes, described cross recess (5) or straight groove (6) are molded over the upper-end surface of described cylindrical head (3), described cylindrical tail portion (4) is installed in the described groove (7), and the length of described cylindrical tail portion (4) is not more than the degree of depth of described groove (7).
3. screw according to claim 2 is characterized in that: described cylindrical midsection branch (8) is 3: 1 with the diameter ratio of described cylindrical tail portion (4).
4. screw according to claim 1, it is characterized in that: describedly twist off the cylindrical head (3) that thing is successively decreased successively by diameter, and conical afterbody (4) constitutes, described cross recess (5) or straight groove (6) are molded over the upper-end surface of described conical head (3), described conical afterbody (4) is installed in the described groove (7), and the length of described conical afterbody (4) is not more than the degree of depth of described groove (7).
5. screw according to claim 4 is characterized in that: the tapering of described conical afterbody (4) is 10-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093085 CN102168708A (en) | 2011-04-13 | 2011-04-13 | Screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093085 CN102168708A (en) | 2011-04-13 | 2011-04-13 | Screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102168708A true CN102168708A (en) | 2011-08-31 |
Family
ID=44489988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110093085 Pending CN102168708A (en) | 2011-04-13 | 2011-04-13 | Screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102168708A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040238A1 (en) * | 2012-09-12 | 2014-03-20 | 西门子公司 | Threaded fastener |
| CN110062604A (en) * | 2016-10-10 | 2019-07-26 | 西特尼斯Ag | Screwdriver with integrated torque protection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937121A (en) * | 1975-04-14 | 1976-02-10 | Pitney-Bowes, Inc. | Double break-off screw |
| EP1004719A2 (en) * | 1998-11-23 | 2000-05-31 | SCHÜCO International KG | Securing screw |
| CN201193639Y (en) * | 2008-04-24 | 2009-02-11 | 肖琦 | License plate anti-theft securing screw |
| CN201448330U (en) * | 2009-03-16 | 2010-05-05 | 施耐德电器工业公司 | Limit torque fastener and limit torque bolt |
| CN201963680U (en) * | 2011-04-13 | 2011-09-07 | 陈文才 | Over-screwing prevention screw |
-
2011
- 2011-04-13 CN CN 201110093085 patent/CN102168708A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937121A (en) * | 1975-04-14 | 1976-02-10 | Pitney-Bowes, Inc. | Double break-off screw |
| EP1004719A2 (en) * | 1998-11-23 | 2000-05-31 | SCHÜCO International KG | Securing screw |
| CN201193639Y (en) * | 2008-04-24 | 2009-02-11 | 肖琦 | License plate anti-theft securing screw |
| CN201448330U (en) * | 2009-03-16 | 2010-05-05 | 施耐德电器工业公司 | Limit torque fastener and limit torque bolt |
| CN201963680U (en) * | 2011-04-13 | 2011-09-07 | 陈文才 | Over-screwing prevention screw |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040238A1 (en) * | 2012-09-12 | 2014-03-20 | 西门子公司 | Threaded fastener |
| CN110062604A (en) * | 2016-10-10 | 2019-07-26 | 西特尼斯Ag | Screwdriver with integrated torque protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110831 |