WO2017065421A1

WO2017065421A1 - Cross-shaped screw

Info

Publication number: WO2017065421A1
Application number: PCT/KR2016/010572
Authority: WO
Inventors: 이영희
Original assignee: 이영희
Priority date: 2015-10-13
Filing date: 2016-09-22
Publication date: 2017-04-20
Also published as: KR20170043338A; KR101778854B1

Abstract

Disclosed is an invention on a cross-shaped screw. The disclosed invention comprises: a body part which has a screw thread formed thereon; a head part which is provided on the end of one side of the body part; a fastening groove part which is concavely formed on the head part so as to enable a fastening tool to be inserted therein, and comprises a first fastening groove concavely formed on the center part of the head part, and a plurality of second fastening grooves concavely formed on the head part so as to be arranged in a "+" shape around the first fastening groove; and a cam-out prevention groove which is concavely formed on the head part so as to be connected with the fastening groove part along the rotating direction of the fastening tool, thereby guiding the insertion of the fastening tool into the fastening groove part.

Description

Phillips screw

The present invention relates to a cross screw, and more particularly, to a cross screw is formed in the head portion is used for the fastening of the components by forming a cross-shaped groove.

In general, when joining two or more parts, or to fix a part that needs to be joined through another part, fastening means such as bolts or rivets are used.

In such fastening means, rivets are prevented from loosening the fixing force even when vibrations or shocks are applied, while the use of the rivets is limited depending on the material and shape of the object to be fixed, especially when disassembly of the combined parts is required. It takes manpower and work time.

Therefore, when fastening a plurality of parts, including mechanical parts or electrical equipment, it has a strong fastening force, while the construction is easy, and the fastening force can be adjusted according to the fastening object, and at the same time using a screw that is easy to dismantle.

The above screw forms a through hole on one side of the object to be fastened, and forms a screw hole on one side of the object on the other end to directly fasten the object by using a fastening force acting through the screw hole, or like a bolt. Each component is combined integrally using the fixing force of the nut fastened through the outer circumferential surface.

Such screws are divided into triangular screws, toothed screws, circular screws, square screws, and trapezoidal screws according to the cross-sectional shape of the thread formed on the outer circumferential surface, and hex head screws, square head screws, countersunk head screws, and round head screws according to the head shape. And flat head screws.

Also, at the center of countersunk screws, round head screws and flat head screws, except for the hexagonal head screws and square head screws, hexagonal grooves, or straight or Form a cross groove.

On the other hand, small screws used in small devices such as precision machines and electronic devices have a flat groove at the center of the screw for the reason that the area of the upper head which provides the space for coupling with the tool is limited and for the manufacturing characteristics of the fastening tool. The selection is limited to one of the formed slotted screws or cross-shaped screws having a cross groove formed in the center of the screw.

In the case of a slotted screw having a slotted groove formed therein, since the groove is easily damaged in the repeated detachment process, a cross slotted screw is generally widely used that can be repeatedly repeated and easily manufactured.

The cross recess of the cross recessed screw is formed in the upper center of the screw head in the manufacturing process of the cross recessed screw, and is generally formed before the formation of the thread.

In the forming process of a cross recess, a cross product of a cross recessed screw is mounted on a mold, and a cross recess is formed by pressing a punch for forming cross recesses having a shape corresponding to the screw recess downward from the center of the screw head. .

According to the conventional Phillips-head screw formed as described above, if the insertion position of the cross groove and the cross groove bit does not coincide exactly during the fastening process by the cross groove bit, the slip of the cross groove bit occurs and the transmission of the fastening force is lowered. Or a cam out phenomenon such that the cross bit is deviated from the cross groove, and the cross groove is crushed.

Moreover, when the fastening operation is performed using a fastening tool such as a cross recess bit rotated by the power tool, such a phenomenon may occur more frequently.

Background art of the present invention is disclosed in Korean Unexamined Patent Publication No. 10-2005-0078721 (2005.08.08. Publication, the name of the invention: intaglio screwdriver and embossed Phillips screwdriver).

An object of the present invention is to provide a cross-shaped screw that can effectively suppress the occurrence of the camout phenomenon in the fastening process using the fastening tool.

Phillips screw according to the present invention includes: a body portion formed with a thread; A head portion provided at one end of the body portion; The fastening tool is recessed in the head portion to be inserted, the first fastening groove is formed concave in the center of the head portion, and concave in the head portion to be arranged in a "+" shape around the first fastening groove A fastening groove portion including a plurality of second fastening grooves formed; And a camout preventing groove formed concavely in the head so as to be connected to the fastening groove along the rotation direction of the fastening tool to guide the insertion of the fastening tool into the fastening groove.

In addition, the camout prevention groove is preferably formed on the side of the fastening groove portion to be located in the rotation region of the fastening tool inserted into the fastening groove portion.

In addition, the camout prevention groove is preferably formed to be located on the rear side than the fastening groove portion connected on the rotation path of the fastening tool to be rotated.

In addition, the camout prevention groove is preferably formed such that the inclined surface inclined downward toward the fastening groove portion on the inner peripheral surface of the head portion.

In addition, the camout prevention groove is formed to have a depth shallower than the fastening groove, it is preferable that the depth of the portion adjacent to the first fastening groove is formed deeper than the depth of the portion extending toward the end side of the second fastening groove. .

The camout preventing groove is formed such that the maximum width of the portion adjacent to the first fastening groove is between 2/13 and 2/9 relative to the maximum width of the second fastening groove, and extends toward an end side of the second fastening groove. The maximum width of the portion is preferably formed to be between 1/13 ~ 1/9 of the maximum width of the second fastening groove.

According to the Phillips-head screw of the present invention, even when each blade of the fastening tool is out of the position that can be accurately engaged with the fastening groove, by inserting the fastening tool into the fastening groove side through the cam-out prevention groove, by using the fastening tool Slip of the fastening tool is generated during the fastening process, it is possible to effectively suppress the occurrence of the cam out (Cam out) phenomenon, such as the screw is splashed or the fastening groove is crushed.

1 is a view showing a planar shape of a cross screw according to an embodiment of the present invention.

2 is a plan view illustrating a cross screw according to an embodiment of the present invention.

3 is an enlarged view illustrating an enlarged portion “A” of FIG. 2.

4 is a cross-sectional view taken along line “IV-IV” of FIG. 2.

5 is an enlarged view illustrating an enlarged portion “B” of FIG. 4.

FIG. 6 is an enlarged view illustrating an enlarged portion “C” of FIG. 4.

Hereinafter, an embodiment of a cross screw according to the present invention will be described with reference to the accompanying drawings. For convenience of description, the thicknesses of the lines and the size of the elements shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a view showing a planar shape of a Phillips screw according to an embodiment of the present invention, Figure 2 is a plan view showing a Phillips screw according to an embodiment of the present invention, Figure 3 is part "A" of FIG. Is an enlarged view showing an enlarged view. 4 is a cross-sectional view taken along the line “IV-IV” of FIG. 2, and FIG. 5 is an enlarged view of an enlarged portion “B” of FIG. 4, and FIG. 6 is an enlarged portion “C” of FIG. 4. It is an enlarged view shown.

1 to 4, the Phillips screw 100 according to an embodiment of the present invention includes a body 110, a head 120, a fastening groove 130, and a camout prevention groove 140. Include.

The trunk portion 110 is a portion coupled to the member to be fastened, and is formed to have a length in the vertical direction. On the outer circumferential surface of the trunk portion 110, a screw thread (not shown) for screwing is formed.

Head portion 120 is provided at one end of the body portion 110, that is, the upper end side of the body portion 110, is formed to have a larger width than the body portion (110).

The fastening groove 130 is formed concavely in the head 120 so that the fastening tool can be inserted into the cross screw 100.

In the present embodiment, the fastening tool is illustrated as a tool such as a driver having a cross groove bit of a shape corresponding to the shape of the fastening groove 130.

The fastening groove 130 may include a first fastening groove 131 and a plurality of second fastening grooves 135.

The first fastening groove 131 is formed in the center of the head 120 to be concave to a depth suitable for insertion of the fastening tool.

In addition, a plurality of second fastening grooves 135 are formed around the first fastening groove 131, and are formed concave in the head 120 so as to be arranged in a "+" shape around the first fastening groove 131. do.

As described above, through the structure in which the plurality of second fastening grooves 135 are arranged around the first fastening groove 131, a "+" shape fastening groove 130 may be formed on the upper portion of the head 120. have.

In addition, it is preferable that each of the second fastening grooves 135 is formed to have a wider width from the inner side to the upper direction so that the inclined surface is formed on the inner circumferential surface of the head 120 in which the fastening groove 130 is formed.

By the second fastening groove 135 formed as described above, the insertion of the fastening tool into the fastening groove 130 may be guided along the inclined surface formed on the inner circumferential surface of the head 120 in which the fastening groove 130 is formed. .

The camout prevention groove 140 is formed concave in the head 120 to be connected to the fastening groove 130 in the rotation direction of the fastening tool.

The camout preventing groove 140 is formed concave in the head portion 120 to be located at the side of each of the second fastening grooves 135, and is located in the rotation region of the fastening tool inserted into the fastening groove 130. It is formed to.

The camout prevention groove 140 formed as described above, the fastening groove of the fastening tool moving toward the fastening groove 130 for insertion with the fastening groove 130 in a state where the insertion position does not exactly match the fastening groove 130. And to guide insertion into 130.

In addition, the camout prevention groove 140 is rear than the second engagement groove 135 connected with the camout prevention groove 140 on the rotation path of the fastening tool rotated to engage the cross screw 100 to perform the fastening operation. It is formed to be located on the side.

When the fastening tool is a cross recess bit rotated by the power tool, the fastening tool may be engaged with the cross screw 100 in the form of being inserted into the fastening groove 130 while moving toward the cross screw 100 in a rotating state. .

In this process, each blade of the cross groove bit, which is a portion inserted into the second fastening groove 135, contacts the head 120 in a state in which it is rotated to a position where it can be inserted into the second fastening groove 135. Can be moved to a location to be.

In consideration of this, the camout preventing groove 140 is moved to a position to be brought into contact with the head 120 in a state in which it is rotated short of the position capable of being inserted into the second fastening groove 135 as described above. Each blade is formed to be located on the rear side than the second fastening groove 135 connected with the camout prevention groove 140 on the rotation path of the fastening tool.

As a result, each blade of the fastening tool moved to a position to be in contact with the head 120 while being rotated to a position that can be inserted into the second fastening groove 135 is inserted into the camout preventing groove 140. Then, the insertion into the second fastening groove 135 connected to the camout preventing groove 140 may be guided.

In addition, the camout prevention groove 140 of the present embodiment, as shown in Figures 4 and 5, the fastening groove 130, more specifically the second fastening groove 135 on the inner peripheral surface of the head 120. It is preferable that the inclined surface that is inclined downward toward is formed.

The camout prevention groove 140 formed as described above slides along the inclined surface of the inner circumferential surface of the head 120 in which the cam tool prevention groove 140 is formed with each blade of the fastening tool inserted into the camout prevention groove 140. By allowing the fastening groove 130 to be moved to the side, it is possible to guide the insertion of each blade of the fastening tool into the fastening groove 130.

In addition, the camout prevention groove 140 of the present embodiment is formed in a shallower length than the fastening groove 130, more specifically, the second fastening groove 135, the portion of the portion adjacent to the first fastening groove 131 The depth d _A is preferably formed deeper than the depth d _B of the portion extending toward the end side of the second fastening groove 135.

The camout prevention groove 140 formed as described above is formed from the end of the second fastening groove 135 to the first fastening groove 131 on the inner circumferential surface of the head 120 where the camout preventing groove 140 is formed. Form an inclined surface formed to be inclined downward.

As such, the inclined surface that is formed to be inclined downward from the end side of the second fastening groove 135 to the first fastening groove 131 on the inner circumferential surface of the head part 120 is formed of the fastening tool inserted into the camout prevention groove 140. Each blade may slide along the inclined surface of the inner circumferential surface of the head 120 to be guided to the first fastening groove 131 side, that is, to the center portion of the fastening groove 130.

That is, as described above by the camout prevention groove 140 is formed on the inner circumferential surface of the head 120 is formed to be inclined downwardly from the end side of the second fastening groove 135 toward the first fastening groove 131 side. The insertion of the fastening tool can be induced so that the insertion position of the fastening tool inserted into the camout prevention groove 140 coincides with the fastening groove 130.

4 and 6, the maximum width w _A of the portion adjacent to the first fastening groove 131 is the maximum width w of the second fastening groove 135, as shown in FIGS. 4 and 6. It is preferable that it is formed so that it may become 2/13-2/9 with respect to _C ), More preferably, it is 2 / 12.1.

In addition, the camout prevention groove 140 has a maximum width w _B of a portion extending toward the end side of the second fastening groove 135 from 1/13 to 1 / of the maximum width w _C of the second fastening groove 135. It is preferably formed so that it is between 9, More preferably, it is 1 / 12.1.

According to this embodiment, one side of the second fastening groove 135 in which the camout preventing groove 140 is formed provides a slope to guide the fastening tool to be smoothly inserted into the fastening groove 130, and the cam The other side of the second fastening groove 135, in which the out prevention groove 140 is not formed, forms a support surface that is forced by the fastening tool so that the rotation of the cross screw 100 for fastening can be performed.

The w w _A _C compared to anti-cam-out rate is greater than the ratio of _C w or w _B exceeding 1/9 to 2/9 of the groove 140 when the formed fastening prevent cam-out on the groove 130 While the area occupied by the groove 140 is too wide, the space into which the fastening tool can be inserted into the fastening groove 130 and the area where the fastening tool can contact the support surface formed on the other side of the fastening groove 130 are too large. Since it is reduced, the fastening groove 130 may be easily worn, and thus may cause a problem in that the repeatability of the cross screw 100 to be repeatedly fastened and dismantled is degraded.

On the other hand, when the cam-out prevention groove 140 is formed such that the ratio of w _A to w _C is less than 2/13 or the ratio of w _B to w _C is less than 1/13, the cam on the fastening groove 130 is formed. Since the area occupied by the out prevention groove 140 becomes too narrow, the function as a guide of the cam out prevention groove 140 which is formed to guide the fastening tool to be smoothly inserted into the fastening groove 130 is deteriorated. This may occur.

In consideration of this, prevention example cam-out of this embodiment groove 140 by forming the ratio, and w _C ratio of w _B of w _C compared w _A to maintain the proper ratio as described above, the engaging groove 130 is easily It is possible to effectively provide a function as a guide for inducing the fastening tool to be inserted into the fastening groove 130 smoothly while preventing the repeated usability of the cross screw 100 is worn.

The cross screw 100 of the present embodiment including the camout preventing groove 140 formed as described above, even if each blade of the fastening tool is out of a position that can be accurately engaged with the fastening groove 130. By inserting the fastening tool 130 into the fastening groove 130 side of the fastening tool through the prevention groove 140, slip of the fastening tool is generated during the fastening process using the fastening tool, such that the screw is splashed or the fastening groove 130 is crushed. The occurrence of a cam out phenomenon can be effectively suppressed.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

100: Phillips screw

110: torso

120: head

130: fastening groove

131: First fastening home

135: second fastening groove

140: Camout prevention groove

Claims

A body portion in which a thread is formed;

A head portion provided at one end of the body portion;

The fastening tool is recessed in the head portion to be inserted, the first fastening groove is formed concave in the center of the head portion, and concave in the head portion to be arranged in a "+" shape around the first fastening groove A fastening groove portion including a plurality of second fastening grooves formed;

And a cam-out prevention groove which is formed concavely in the head so as to be connected to the fastening groove along the rotation direction of the fastening tool and guides the insertion of the fastening tool into the fastening groove.
The method of claim 1,

The cam-out prevention groove is a cross-shaped screw, characterized in that formed on the side of the fastening groove portion to be located in the rotation region of the fastening tool inserted into the fastening groove portion.
The method of claim 1,

The cam-out prevention groove is a cross-shaped screw, characterized in that formed on the rear side than the fastening groove portion connected on the rotation path of the fastening tool to be rotated.
The method of claim 1,

The cam-out prevention groove is a cross-shaped screw, characterized in that formed on the inner circumferential surface of the head portion inclined inclined downward toward the fastening groove portion.
The method of claim 1,

The camout prevention groove is formed to have a depth smaller than the fastening groove portion, characterized in that the depth of the portion adjacent to the first fastening groove is formed deeper than the depth of the portion extending toward the end side of the second fastening groove. Phillips screws.
The method of claim 5,

The camout preventing groove is formed such that the maximum width of the portion adjacent to the first fastening groove is between 2/13 and 2/9 relative to the maximum width of the second fastening groove, and extends toward an end side of the second fastening groove. Crosswise screw is characterized in that the maximum width of the portion is formed so as to be between 1/13 ~ 1/9 of the maximum width of the second fastening groove.