CN202381487U - Self-tapping screw - Google Patents
Self-tapping screw Download PDFInfo
- Publication number
- CN202381487U CN202381487U CN2011205441619U CN201120544161U CN202381487U CN 202381487 U CN202381487 U CN 202381487U CN 2011205441619 U CN2011205441619 U CN 2011205441619U CN 201120544161 U CN201120544161 U CN 201120544161U CN 202381487 U CN202381487 U CN 202381487U
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- CN
- China
- Prior art keywords
- tapping screw
- nut
- striking
- screw
- convexity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a self-tapping screw. The self-tapping screw comprises a screw cap and a screw rod connected with the screw cap, wherein a stripping protrusion for stripping a paint film is arranged on the lateral surface of the screw cap, which faces to the screw rod. When the self-tapping screw disclosed by the utility model is in use, outer layer substances such as a spraying plastic layer or a corrosion layer outside electrical equipment can be stripped by the stripping protrusion, and thus the contact between the self-tapping screw and the electrical equipment is realized, the reliable and effective contact between the electrical equipment and the ground is ensured and the operation safety of the electrical equipment is ensured.
Description
Technical field
The utility model relates to the link technical field, in particular to a kind of tapping screw.
Background technique
Currently household metal electrical box between components and connection between the ground and the metal shell, generally with a flat head self tapping screws, tighten the screws by the coupling of the metal pieces, or with metal contact between the connection, but if like spray layer between metal parts, paint layer, the layer of rust Tong, foreign body touching the ground will be unreliable.
To address the paint layer, the foreign body is not reliable grounding problems have non-slip screw, this screw the nut is characterized by the following toothed pattern, with screws tightened tooth pattern will join in contact with the metal shell rust Tong layer shaved scraping paint layer.Though but this anti-skid screw has groove, groove is more blunt, and area is bigger, and is superficial, can't guarantee can both punch the plastic-blasting layer of right sideboard at every turn, causes imperfect earth.And this anti-skid screw groove area is bigger, can the plastic-blasting layer of nut periphery be struck off, influence outward appearance.
The model utility content
The utility model aims to provide a kind of reliable tapping screw of electric equipment ground connection that makes.
To achieve these goals, the utility model provides a kind of tapping screw, comprising: nut; Screw rod is connected with nut, and the side towards screw rod of nut is provided with the convexity of striking off that is used to strike off paint film.
Further, strike off protrudingly for a plurality of, a plurality of convexities of striking off are distributed on the circumference with the nut concentric.
Further, strike off the protruding inside that is positioned at the edge of this side in the projection of nut on the side of screw rod.
Further, strike off the protruding taper double wedge that is, the taper double wedge comprises cylindrical portion and awl section, and the awl section is positioned at the outer end of taper double wedge.
Further, the awl section is cone table shape.
Further, offer straight groove or cross recess on the nut.
Further, striking off convexity is three.
Further, offer discharge groove on the sidewall of screw rod away from an end of nut.
In the technological scheme of the utility model, tapping screw comprises: the nut and the screw rod that is connected with nut, and the side towards screw rod of nut is provided with the convexity of striking off that is used to strike off paint film.The tapping screw of the utility model in use; Strike off outer materials such as outer plastic-blasting layer of electric equipment or corrosion layer through striking off convexity; The realization tapping screw contacts with electric equipment, has guaranteed that electric equipment reliably contacts with ground effectively, has guaranteed the security of operation of electric equipment.
Description of drawings
The Figure of description that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
The master that Fig. 1 shows according to the embodiment of the tapping screw of the utility model looks schematic representation;
Fig. 2 show Fig. 1 tapping screw A-A to cross-sectional schematic;
Fig. 3 shows the elevational schematic view of the tapping screw of Fig. 1; And
Fig. 4 shows the schematic top plan view of the tapping screw of Fig. 1.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
The master that Fig. 1 shows according to the embodiment of the tapping screw of the utility model looks schematic representation; Fig. 2 show Fig. 1 tapping screw A-A to cross-sectional schematic; In conjunction with referring to Fig. 1 to Fig. 2, as can be seen from the figure, the tapping screw in the present embodiment comprises nut 10 and the screw rod 20 that is connected with nut 10; Wherein, nut 10 is provided with towards first side of screw rod 20 and strikes off protruding 11.Strike off the setting of convexity 11; Make tapping screw when connecting metalwork; Can use and strike off the protruding 11 outer materials such as plastic-blasting layer or corrosion layer that strike off on the outer metallic surface, contact, guarantee the good contact of tapping screw and metalwork with the metalwork that is positioned at outer material such as plastic-blasting layer or corrosion layer below; Guarantee metalwork is connected with ground the safety in utilization of protection household electric appliance.
As shown in Figure 3; The above-mentioned convexity 11 of striking off is the taper double wedge; The taper double wedge comprises cylindrical portion and awl section, and outer end and awl section that the awl section is positioned at the taper double wedge are cone table shape, this set help striking off protruding when contacting with outer material; Utilize the awl section of double wedge partly to strike off outer material, and contact with metalwork under the outer material.Simultaneously; Do not influence its outward appearance when striking off protruding 11 outer materials such as plastic-blasting layer or corrosion layer on striking off outer metallic surface in order to make; It is inner at the edge that the projection of nut 10 on the side of screw rod 20 is positioned at this side to strike off convexity 11; This set; Strike off protruding 11 can not strike off nut 10 peripheries outer materials such as plastic-blasting layer, guaranteed the overall aesthetics of electric equipment, make adjacent regions plastic-blasting layer possibly have the cascading effect that comes off continuously after also having avoided outer material such as plastic-blasting layer to scratch.
The convexity 11 of striking off in the present embodiment can be a plurality of; A plurality of striking off on protruding 11 circumference that are arranged on equably with nut 10 concentrics; This set; A plurality of convexities 11 of striking off are struck off outer materials such as plastic-blasting layer or corrosion layers on same circumference, improved the quality of connection between metalwork and the ground.Preferably, striking off protruding 11 is 3, and this set makes that the interval of striking off between protruding 11 is suitable, be convenient to processing, and three points location is more reliable and more stable.Certainly, the shape and the arrangement that strike off convexity 11 of the utility model do not limit in the present embodiment, and the reasonable change of other shapes and setting type also can be arranged.
As shown in Figure 4, for ease tapping screw is fixed, on second side of nut 10, also offer straight groove or cross recess away from screw rod 20, simultaneously, offer discharge groove 21 on the sidewall of screw rod 20 away from an end of nut.The setting of discharge groove 21 can make the self tapping screw of present embodiment when tapping, chip discharged in discharge groove 21, increases work efficiency.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. tapping screw comprises:
Nut (10);
Screw rod (20) is connected with said nut (10),
It is characterized in that, the side towards said screw rod (20) of said nut (10) be provided be used to strike off paint film strike off convexity (11).
2. tapping screw according to claim 1 is characterized in that, the said convexity (11) of striking off is for a plurality of, and said a plurality of convexities (11) of striking off are distributed on the circumference with said nut (10) concentric.
3. tapping screw according to claim 2 is characterized in that, saidly strikes off convexity (11) is positioned at the edge of this side in the projection of said nut (10) on the side of said screw rod (20) inside.
4. according to each described tapping screw in the claim 1 to 3, it is characterized in that the said convexity (11) of striking off is the taper double wedge, said taper double wedge comprises cylindrical portion and awl section, and said awl section is positioned at the outer end of said taper double wedge.
5. tapping screw according to claim 4 is characterized in that, said awl section is cone table shape.
6. tapping screw according to claim 1 is characterized in that, said nut offers straight groove or cross recess on (10).
7. tapping screw according to claim 2 is characterized in that, the said convexity (11) of striking off is three.
8. tapping screw according to claim 1 is characterized in that, offers discharge groove (21) on the sidewall of said screw rod (20) away from an end of said nut (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205441619U CN202381487U (en) | 2011-12-21 | 2011-12-21 | Self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205441619U CN202381487U (en) | 2011-12-21 | 2011-12-21 | Self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381487U true CN202381487U (en) | 2012-08-15 |
Family
ID=46629992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205441619U Expired - Lifetime CN202381487U (en) | 2011-12-21 | 2011-12-21 | Self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381487U (en) |
-
2011
- 2011-12-21 CN CN2011205441619U patent/CN202381487U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |