JP2006327169A - Drawing-pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a reduction in the danger of falling out compared with a conventional drawing-in and the use of the same pinholing and, moreover, to enable it to hang an object without changing the fixing force without newly damaging the surface of a wall. <P>SOLUTION: After the drawing-pin is stabbed with a pimple 2 located in the part of a drawing-pin needle 1, so as it to fix the drawing-pin by embedding the pimple 2 into the wall, etc. by rotating the pimple 2. Moreover, it is suitable for the hanging object in the shape of handles 3, 4, and 5, when it is scattered on a floor, etc., it forms as the shape from which the needle 1 does not become upward. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, a projection is provided on the needle portion of the thumbtack so that the thumbt is difficult to come off.

  The conventional thumbtack is fixed by the frictional force around the needle, and has a surface that is not suitable for a large load. In addition, the portion around the needle may be plastically deformed with the passage of time, and the frictional force may be reduced to fall off naturally. In this case, even if the needle is once again inserted in the part that has been removed, the effective function is not performed, so that the needle is inserted in another place and the wall or the like is damaged. Also, it is dangerous if the thumbtack that falls out is scattered on the floor or the like with the needle up.

  The conventional thumbtack is a mechanism that is fixed by the frictional force of the needle part, the fixing force is also small, and the needle peripheral part plastically deforms over time, and the frictional force decreases and may fall off naturally. . In this case, even if a thumbtack is inserted into the same needle hole again, an effective frictional force cannot be obtained and it is difficult to fix it. Moreover, it was not suitable for the usage method which suspends an object from the mechanism. An object of the present invention is to improve such a mechanism of a conventional thumbtack and widen the range of use.

  According to a first aspect of the present invention for solving this problem, a protrusion is provided on a needle, a thumbtack is inserted into a wall surface, and then rotated by 90 ° to be fixed.

According to the second aspect of the present invention, when the thumbtack is rotated 90 ° and fixed and then removed, the direction of the protrusions attached to the needle can be known, and the wall or the like is not damaged when removed.
Thereby, the same needle hole can be used repeatedly. In addition, it can be used as a hook when suspending an object using the difficulty of pulling out the thumbtack.

  The invention of claim 3 is for preventing the needle from pointing upward when the upper surface of the handle is curved and the thumbtack is scattered on the floor or the like.

  According to the present invention, the risk of falling out compared to a conventional thumbtack is reduced, the same needle hole can be used, the wall surface is not damaged, and the fixing force is not changed. The conventional thumbtack is intended to hold a poster or the like, but the thumbtack according to the present invention can also hang an object.

  FIG. 1 is a side view of the component. As shown in the figure, a protrusion is provided on the needle portion. As shown in FIG. 2, the protrusions are provided on opposite sides of the needle, and the positions of the upper and lower protrusions are arranged on the vertical line.

  The upper part of the needle should be fully inserted into the handle so that the needle will not fall out of the handle or only the handle will not rotate when it is re-used and removed.

  The needle material is made of an anti-corrosive material such as stainless steel in consideration of durability and strength.

  The material of the handle may be a plastic with good processability.

  When a thumbtack is attached, the needle is inserted into the attachment position, and then the handle is rotated by 90 ° around the needle and fixed.

  When the thumbtack is removed, the handle is rotated 90 ° in reverse about the needle and pulled out at the inserted position.

  Since the thumbtack according to the present invention can be industrially mass-produced, it has industrial applicability.

  It is a side view of a thumbtack.   It is sectional drawing of the part of the processus | protrusion attached to the needle of the thumbtack. (A-A cross section)   The top view of the part of the thumbtack pattern.   Sectional drawing of the part of the processus | protrusion attached to the needle | hook of the state rotated 90 degrees after inserting the thumbtack (state of FIG. 3).

Explanation of symbols

1 A thumbtack needle.
2 A protrusion on the thumbtack needle.
3 Top of thumbtack pattern.
4 Center of thumbtack pattern.
5 Bottom of thumbtack pattern.
6 Position of the needle protrusion before the thumbtack is rotated 90 ° and fixed.
7 Surfaces such as walls.

Claims (3)

  A thumbtack that can be fixed without relying on frictional force by providing a protrusion on the needle.   In order to fix the thumbtack, the needle is rotated by 90 °, so that the handle part is processed to 90 °, and the thumbtack has a shape suitable for hanging an object on the handle.   A thumbtack whose upper surface is curved and prevents the needle from pointing upwards when scattered on the floor.

Images