CN211550210U

CN211550210U - Paint-scratching screw

Info

Publication number: CN211550210U
Application number: CN201921496098.9U
Authority: CN
Inventors: 徐以会; 马赛; 孙帅; 刘宝堂
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-09-22
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a draw lacquer screw. The paint-scribing screw comprises a screw head, a screw rod and a paint-scribing piece. The screw rod is connected to the middle of the lower bottom surface of the screw head, a paint scratching piece is arranged on the periphery of the lower bottom surface of the screw head at the connection part of the screw rod, and the paint scratching piece is arranged in a convex shape on the lower bottom surface of the screw head. When the paint scratching screw is used, the paint scratching piece can rub with other electric appliance grounding structures when the screw is screwed, so that insulating paint of the grounding structures at corresponding positions is removed, and the mutual connection of metal materials between the screw and the grounding structures is realized. This draw lacquer screw can only realize getting rid of the effect of insulating layer at this the part of contact of screw and ground structure contact surface on keeping original not exposing metallic material too much with electrical apparatus shell, realizes the metallic material of screw and the function of being connected well with electrical apparatus ground structure, has both guaranteed the validity with the insulating layer of electrical apparatus shell, realizes the function of protection against electric shock, has ensured conduction current's validity again simultaneously.

Description

Paint-scratching screw

Technical Field

The utility model belongs to the technical field of the technique of mechanical reinforcement spare part and specifically relates to a set screw that is commonly used for connecting with electrical apparatus earth connection and with electrical apparatus metal casing especially.

Background

In the existing technical scheme of grounding an electrical appliance, the most common technical scheme is to use a screw to connect the grounding wire of the electrical appliance and the metal shell of the electrical appliance. Divide into a plurality of sheet metal components with the electrical apparatus shell, every sheet metal component all can be on the surface coating insulating layer in order to prevent to electrocute. The insides of different sheet metal parts of the electrical appliance shell can be respectively and tightly connected with the grounding wire by screws, so that each sheet metal part can meet the grounding requirement.

However, due to the existence of the insulating layer, the metal materials of each sheet metal part can not be actually contacted with each other between the connecting parts, and thus, only respective grounding design can be carried out, and the grounding of the whole machine can not be realized. The existing grounding mode of the electric appliance causes the electric shock risk of a certain sheet metal part because the sheet metal part is not integrally grounded with other sheet metal parts when the grounding of the sheet metal part fails.

SUMMERY OF THE UTILITY MODEL

In order to solve above-mentioned background art, among the current ground screw or insulating function is imperfect, or the poor problem of contact failure electrical conductivity, the utility model provides a draw lacquer screw's technical scheme can be in the nimble condition of dismantling ground screw under, insulating nature and electric conductivity when the guarantee screw is screwed are not destroyed.

The technical scheme of the utility model as follows:

a paint-scratching screw comprises a screw head and a screw rod; the lower bottom surface of the screw head is provided with a paint scratching piece.

Further, the screw rod is connected to the middle position of the lower bottom surface of the screw head, and the painting part is arranged at a position outside the connection position of the screw rod and the screw head.

Further, the painting part is in a convex shape, and the convex direction is perpendicular to the lower bottom surface of the screw head or forms an included angle with the lower bottom surface.

Further, the lower bottom surface of the screw head is circular.

Furthermore, the painting parts are arranged to be distributed symmetrically with the center of the circle of the lower bottom surface of the screw head.

Further, the painting members are arranged to be axisymmetrically distributed along the diameter line of the bottom surface of the screw head.

Further, the painting member is in the shape of a round bump.

Further, the painting member is saw-toothed.

Further, the painting screw is made of stainless steel materials.

In the technical scheme of the paint marking screw, when the paint marking screw is used for connecting a paint coating shell of an electric appliance and a shell and a grounding wire, the screw only needs to rotate on a screw hole of the electric appliance shell, and a raised paint marking piece can rub the paint coating shell of the electric appliance when rotating, so that the top end of the paint marking piece scrapes off insulating layer paint on the corresponding position of the electric appliance shell or the grounding wire, the stainless steel material at the top end of the paint marking piece is in contact with the metal material or the grounding wire of the electric appliance shell, a conductive path is formed, and the paint marking screw is effectively connected with the grounding wire or the electric appliance shell.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:

the utility model discloses a draw lacquer screw and compare prior art center for tight setting is with electrical apparatus shell and the screw that makes shell ground connection, except on drawing the position on the effective contact on lacquer piece top, still coated by insulating material with all the other positions of electrical apparatus shell, and the position of junction can not contacted by the human body again, owing to still can spray paint the cover insulating layer to the screw in proper order again behind the tight setting screw, this validity of having just guaranteed insulation, can be safer to the user. And because the top end of the round convex paint-scratching part scrapes the insulating material on the specific position of the electric appliance shell in the screwing process, a conductive path is formed among different sheet metal parts of the electric appliance shell and between the grounding wire and the different sheet metal parts through screws, so that the grounding function of the whole electric appliance shell is realized, and the grounding is not required to be arranged among different sheet metal parts in the prior art. Moreover, the mode of using the painting screw to conduct whole machine grounding is simple in structure and low in cost, and the production flow does not need to be changed.

Drawings

FIG. 1 is a schematic structural view of one embodiment of the scratch-coated screw;

FIG. 2 is a schematic structural view of another embodiment of the scratch-coated screw;

in fig. 1 and 2: the screw head 1, the screw rod 2, the round convex point painting part 3, the screw head 4, the screw head 5, the sawtooth painting part 6 and the round convex point painting part 7.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent. For a better understanding of the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent actual product dimensions. It will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "designed," "connected," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1, in the present embodiment, the structure of the painting screw includes a screw head 1, a circular screw rod 2, and a circular dot painting member 3. The painting screw is made of stainless steel materials.

The scored screw of this embodiment is a thread tapping screw. The upper bottom surface of the screw head 1 is hexagonal, and the lower bottom surface is circular. The screw rod 2 is fixedly connected at the center of the lower bottom surface of the screw head 1. Three round convex point painting parts 3 are symmetrically distributed on the lower bottom surface of the screw head 1 at the periphery of the central position. The round convex point painting part 3 is a hemispherical bulge, and the direction of the bulge is vertical to the lower bottom surface of the screw head 1.

In this embodiment, when using this to draw between the japanning shell of lacquer screw pair with electrical apparatus, when being connected between shell and the earth connection, only need to rotate the screw on the screw of electrical apparatus shell, the round salient point is drawn lacquer 3 and will be rubbed with the japanning shell with electrical apparatus when rotatory, thereby make the round salient point draw 3 tops of lacquer piece to strike off with electrical apparatus shell or the insulating layer coating on the corresponding position on the earth connection, thereby realize that the round salient point draws mutual contact between the stainless steel material on 3 tops of lacquer piece and the metal material or the earth connection of electrical apparatus shell, and then constitute a conducting path, realize drawing japanning screw effective connection earth connection or with electrical apparatus shell.

The effect of this embodiment is that, except in the position that the round bump japanning 3 top is effective to be contacted, still coated by insulating material with the rest positions of electrical apparatus shell, and the junction position can not touched by the human body again, so guaranteed insulating validity, can be safer to the user. And because the top end of the round convex point painting part 3 scrapes the insulating material on the specific position of the electric appliance shell in the screwing process, a conductive path is formed among different sheet metal parts of the electric appliance shell and between a grounding wire and the different sheet metal parts, thereby realizing the function of the whole grounding of the electric appliance shell.

Example 2

The structure of the paint-scratching screw of the embodiment comprises a screw head 4, a screw rod 5, a sawtooth paint-scratching piece 6 and a dot paint-scratching piece 7. The painting screw is made of steel materials.

The scored screw of this embodiment is a thread tapping screw. The upper bottom surface of the screw head 4 is hexagonal, and the lower bottom surface is circular. The screw rod 6 is fixedly connected at the center of the lower bottom surface of the screw head 1. Two round convex point painting parts 7 and a sawtooth painting part 6 are axially and symmetrically distributed on the lower bottom surface of the screw head 4 at the periphery of the central position. The round convex point paint-marking piece 7 is a hemispherical convex part, the sawtooth paint-marking piece 6 is a sawtooth convex part, and the convex directions of the sawtooth paint-marking piece 6 and the round convex point paint-marking piece 7 are vertical to the lower bottom surface of the screw head 4.

In this embodiment, when using this to draw between the lacquer shell of lacquer screw pair with electrical apparatus, when being connected between shell and the earth connection, only need to rotate the screw on the screw of electrical apparatus shell, saw tooth draw lacquer spare 6 and round salient draw lacquer spare 7 will rub with the lacquer shell of electrical apparatus when rotatory, thereby make the saw tooth draw lacquer spare 6 and round salient draw lacquer spare 7 scrape off the insulating layer coating on electrical apparatus shell or earth connection on the relevant position, thereby realize that the saw tooth draws the stainless steel material on the top of lacquer spare 6 and round salient draw lacquer spare 7 and contact each other between the metal material of electrical apparatus shell or the earth connection, and then constitute a conducting path, realize drawing lacquer screw effective connection earth connection or electrical apparatus shell.

The effect of this embodiment is that, except at the position of the top end of the sawtooth painting part 6 and the round bump painting part 7 which are effectively contacted, the rest positions of the electric appliance shell are still coated by the insulating material, and the position of the joint can not be contacted by the human body, so the insulating effectiveness is ensured, and the safety is better for the user. And because the insulating materials on the specific positions of the electric appliance shell are scraped from the top ends of the sawtooth painting part 6 and the round convex point painting part 7 in the screwing process, a conductive path is formed among different sheet metal parts of the electric appliance shell and between a grounding wire and the different sheet metal parts, and the whole grounding function of the electric appliance shell is realized.

In the above embodiments, the application of the painting screw to other types of connection structures, or the practice of changing the dimensional ratio of the parts, or simply changing the shape of the painting member, is only a routine replacement for the present embodiment, and does not provide substantial changes and improvements, and also falls within the scope of the claims of the present invention.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A paint-scratching screw comprises a screw head and a screw rod; the method is characterized in that: a paint scratching piece is arranged on the lower bottom surface of the screw head; the paint scraping piece is used for scraping an insulating coating on an external electric appliance shell or a grounding wire, so that a screw head and a metal material of the external electric appliance shell or the metal material of the grounding wire are contacted with each other to form a conductive path.

2. A paint scoring screw as claimed in claim 1, wherein: the screw rod is connected to the middle position of the lower bottom surface of the screw head, and the paint scratching piece is arranged at a position outside the connection position of the screw rod and the screw head.

3. A paint scoring screw as claimed in claim 2, wherein: the painting part is in a convex shape, and the convex direction is perpendicular to the lower bottom surface of the screw head or forms an included angle with the lower bottom surface.

4. A paint scoring screw as claimed in claim 3, wherein: the lower bottom surface of the screw head is round.

5. A paint scoring screw as claimed in claim 4, wherein: the painting parts are arranged to be distributed symmetrically with the center of the circle of the lower bottom surface of the screw head.

6. A paint scoring screw as claimed in claim 4, wherein: the painting parts are arranged to be distributed in an axisymmetric mode along the diameter line of the lower bottom surface of the screw head.

7. A paint scoring screw as claimed in claim 5, wherein: the painting part is in a shape of a round convex point.

8. A paint scoring screw as claimed in claim 6, wherein: the painting part is in a sawtooth shape.

9. A paint scoring screw as claimed in claim 5 or 6, wherein: the painting screw is made of stainless steel materials.