JP3060705U - Screw head structure - Google Patents

Abstract

(57) [Summary] [Problem] To provide a screw head structure that is easy to turn with a screwdriver and does not easily collapse a groove. SOLUTION: In the present invention, in a screw 1 having a head 11 at one end and a shank 12 at another end, a substantially Y-shaped groove 111 is recessed in the center of the upper surface of the head 11 to form the groove 111. The groove of the book just divides the head of the screw 1 equally in a plan view, and when the screw 1 is turned, it forms a three-point contact with the driver 12, and the rotational force proceeds in the circular sealing direction, It has a screw head structure that is easy to turn and can withstand a relatively large torque.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a structure of a screw head, and more particularly to a structure capable of performing secure and stable fastening, easily engaging with a driver, hardly collapsing the head, and improving the efficiency and quality of fastening. .

[0002]

[Prior art]

 As shown in FIGS. 1 to 4, general screw head forms are classified into two types: slotted and cross-shaped. 5 and 6 show the drivers used for them. As shown in Figs. 7A and 7B, the slotted head is provided with a single-shaped split groove, and when it is attached and detached with a-shaped screwdriver, it comes into contact with the driver at two points in the split groove. However, since the torque received when the head of the screw is turned is shared only at points A and B, it takes a relatively large amount of force to turn the screw, making it impractical and placing the screwdriver in a single-letter slot. The insertion operation was difficult, slipping and detaching easily, which was inconvenient in use. For this reason, general contractors have increasingly used screws with cross recesses in place of the slotted screws. As shown in FIGS. 8A and 8B, when a cross-shaped screwdriver is combined with a + -shaped screwdriver, there are four contact points, which are relatively average in the received force. B, C, and D share the four points. However, structurally, as the number of points formed increases, the side wall of the hole or split groove becomes more fragile and is more likely to be broken by an external force. When any one of the four points of the cross hole, for example, point E, is destroyed by an external force, the distribution of power is not evenly distributed and the driver slips off. And the cross-recessed screw makes four-point contact with the driver, for which the dimensions of the driver must match the dimensions of the cross-recess, otherwise the There was a situation where the receiving power at one point was uneven. This phenomenon can be caused by the fact that when using a tripod, even if the ground is uneven or the length of the tripod is different, it can be stably stood on the ground. If the lengths of the monopods are different or the ground is uneven, this is the same reason that an unstable situation can occur, such as tilting or wobbling. The hole at the head of the screw differs depending on the manufacturer and the manufacturing process, and the precision of the driver is also subject to errors during the manufacturing and processing. For this reason, when inserting the screwdriver into the hole at the head of the screw, some wear is likely to occur during rotation, and the screwdriver will not come into complete contact with the screw head when turning the screw, making it easier for the driver to slip off became. Therefore, there was a need for improvement.

[0003]

[Problems to be solved by the invention]

 The present invention provides a structure in which a screw head has three points of contact with a driver, so that the screw head can be more stably engaged with the screw head and the screw can be turned by the driver. The task is to improve work efficiency.

[0004]

[Means for Solving the Problems]

 According to the invention of claim 1, in the screw 1 having one end as a head 11 and the other end as a shank 12, a substantially Y-shaped groove 111 is formed in the center of the upper surface of the head 11 to form the groove 111. The three grooves just divide the head of the screw 1 equally in plan view, and when the screw 1 is turned, it forms a three-point contact with the driver 12 and the rotational force proceeds in the circular sealing direction. However, it has a screw head structure that is easy to turn and can withstand relatively large torque.

[0005]

[Embodiment of the invention]

 Please refer to FIG. 9 to FIG. These figures show the structure of one embodiment of the present invention. However, this is provided for explanation and does not limit the claims of the present invention.

As shown in FIGS. 9 to 12, the screw head structure of the present invention includes a screw 1, one end of which is a head 11, and the other end of which is a shank 12. The features of the present invention are described below.

A substantially Y-shaped groove 111 is formed in the center of the upper surface of the head 11 of the screw 1, and three grooves constituting the groove 111 exactly divide the head of the screw 1 equally in a plan view. When the screw 1 is turned, a three-point contact is formed with the driver 12 so that the rotational force proceeds in the circular sealing direction so that it is easy to turn and the torque that can be endured is relatively large.

As can be seen from the above description, the feature of the present invention is that the screw 1 can be easily operated by the three-point contact structure.

[0009]

[Effect of the invention]

 The features of the present invention are specifically described as follows. 1. Stable combination with driver by three-point contact. In other words, as can be seen from the principle of space, two points are straight lines, three points are planes, and the three-point contact enables more stable insertion and insertion of an article and pinching of another article. In the present invention, the head of the screw is divided into three equal parts, and the screw is in three-point contact with the screw head.The receiving force of the screw head is averaged, the screw is tightly inserted into the screw, and the external force is applied. It is hard to break and can withstand relatively large torque. 2. Easy to turn and efficient. That is, when a general driver turns, the driver advances in a circular direction, and the direction of the force received at the point of contact between the driver and the screw becomes a perpendicular cutting line direction. However, in the present invention, the groove has a three-point contact structure with the driver, so that the tangential direction at the time of the receiving force is almost circular (see FIG. 11A), and the conventional slotted and cross-shaped holes are used. Easier to turn than the attached screw.

The embodiments described above are provided to explain the present invention, and do not limit the scope of the claims of the present invention. Modifications or alterations of details that can be easily conceived based on the present invention may be made. , Both belong to the claims of the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional slotted flat screw.

FIG. 2 is a perspective view of a conventional cross-shaped flat head screw.

FIG. 3 is a perspective view of a conventional slotted round screw.

FIG. 4 is a perspective view of a conventional round screw with a cross hole.

FIG. 5 is a perspective view of a conventional-shaped driver.

FIG. 6 is a perspective view of a conventional + driver.

FIG. 7 is a view showing a force applied by a screwdriver with a conventional slotted screw.

FIG. 8 is a view showing a force applied by a screwdriver with a conventional cross-recessed screw.

FIG. 9 is a perspective view of the embodiment of the present invention.

FIG. 10 is a perspective view of another embodiment of the present invention.

FIG. 11 is a view showing a force applied by the driver of the present invention.

FIG. 12 is a perspective view of a driver combined with the present invention.

[Explanation of symbols]

 1 Screw 11 Head 12 Shank 111 Groove 12 Screwdriver

Claims (1)

[Utility model registration claims] 1. A screw 1 having a head 11 at one end and a shank 12 at another end, a substantially Y-shaped groove 111 is formed in the center of the upper surface of the head 11, and three grooves forming the groove 111 are provided. Just divides the head of screw 1 equally in a plan view, and forms three-point contact with driver 12 when screw 1 is turned,
A screw head structure that is configured so that the rotational force proceeds in a circular sealing direction, is easy to rotate, and can withstand relatively large torque.