JP3182723U - thumbtack - Google Patents

Abstract

Kind Code: A1 A thumbtack is provided that is less likely to come off when fastened to a wall or the like and has less damage to the base.
When a thumbtack is fastened to a wall or the like, the hook part is formed in a spiral g in order to make it difficult to come out, and when fastened, a pushing part of an external structure is used to reduce damage to the ground. a and a cylindrical casing portion b having a concave and convex spiral groove on the inner side, a portion c having a concave and convex spiral groove on the outer side of the inner structure portion, and a flange portion at the tip portion It is configured, and by pushing the push-in portion, it is engaged with each other by the spiral concavo-convex grooves, so that rotation occurs and it becomes easy to insert in conjunction with the heel portion.
[Selection] Figure 1

Description

  In order to make it difficult to pull out the thumbtack, it is made into a spiral ridge (there is also a spiral and arrowhead shape). By sticking, we will provide a thumbtack that is easy to remove and fastens the substrate with as little damage as possible.

  Originally, the thumbtack is a straight sword. The spiral sword is used to make it difficult to pull out, and the base structure is stabbed together while rotating the internal structure. Providing pushpins that are fastened while holding down.

Noto 3170327

  If the thumbtack is fastened to a wall, it will be difficult to pull out and damage to the ground will be reduced.

  The problem to be solved is that when the thumbtack is fastened to a wall or the like, the hook part is spiraled to prevent it from being pulled out (there is also a spiral or arrowhead shape), and when fastened, In order to reduce damage, the external structure push-in part and the cylindrical casing part with the concave and convex spiral grooves on the inner side, and the internal structure part on the outer side of the cylindrical shape are concave and convex. It is composed of a part with a spiral groove and a collar part at the tip part, and by pushing the pushing part, it meshes with each other's spiral concave and convex grooves, so that rotation occurs and it is easy to insert in conjunction with the collar part Become.

  The pullout strength increased by making the heel part spiral (there is also a spiral and arrowhead shape).

It is a cross-sectional explanatory drawing of the longitudinal direction center part of a use condition. It is sectional drawing of the horizontal direction of a spiral inside and an uneven | corrugated | grooved part. It is a figure and cross section of a spiral, arrowhead shape.

  The interior wall materials used in recent home construction are made of soft gypsum board, so it is difficult for the thumbtack to work. For this reason, spiral walls (also with a spiral arrowhead shape) are used. The pull-out strength increases, making it difficult to pull out. Since the heel part has a spiral shape, it is pushed in slowly and pulled out as much as possible to reduce damage to the wall. Because of the structure that causes rotation by meshing each other, resistance to the wall material of the spiral ridge can be reduced.

a, an inner hollow, a pushing portion having a spatial structure, and a portion having an inner side spiral-shaped uneven groove [a pushing margin portion, (a) indicates a range]
b, the outer part of the casing part c having a spiral concave / convex groove integrated with the pushing part, the outer structure of the casing part c, and the outer part of the spiral part of the casing being rotated by pressing inside the casing Cylindrical coma portion d of inner structure having a groove, spiral ridge portion, tip portion is a straight portion e, spiral concave groove portion f causing rotation, spiral convex shape causing rotation When the protruding part g and the ridge part have a spiral arrowhead shape (there is a broken line)

Claims (5)

  A thumbtack that makes it difficult to pull out by tightening the thumbtack part of the thumbtack.   The thumbtack body consists of two parts. The push-in part is composed of a part that is integral with the cylindrical casing, and the part that is the integral part of the flange part at the tip and the cylindrical part inside the push-in part. Is insulated by a minute gap, but is joined by a helical engagement groove with a concave and convex shape, and there is a hollow part that can be pushed in, and when it is fastened, it can be rotated to rotate into the ridge part of the spiral ridge. A thumbtack as described in claim 1 that can be fastened to the base and made difficult to come off by generating a rotation by a helical engagement groove.   When pulling out the object after fastening it, the casing part on the outside of the push-in part is pulled out with the knob rotation fixed, and the part where the spiral heel part inside the push-in part is integrated with each other The thumbtack according to claims 1 and 2, which can be pulled out by reducing the damage to the wall by causing reverse rotation as compared with the insertion by the helical engagement groove of the concave and convex shape in contact.   A thumbtack according to claims 1 to 3, wherein the tip end part is a straight line part.   The thumbtack of claims 1 to 4, in which the hook part has a spiral arrowhead shape.

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