JP3795622B2 - Synthetic plastic female part for snap fastener - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin female member for constituting a female snap of a snap fastener, and more specifically, after being inclined so as to become lower toward the outer side, it is recessed into the back surface side at the center of an annular substrate hanging downward. In addition, a female fitting portion in which a protruding portion that locks the protruding portion of the male member is formed on the inner peripheral surface of the upper end side with a small gap in the circumferential direction is provided continuously. A through-hole is formed in the center of the bottom wall of the flexible film body to insert and insert a protrusion of a rivet member that is driven from one side of the flexible membrane body, and between the annular substrate back surface and the female fitting portion. Improvement of a synthetic resin female mold member for a snap fastener in which a plurality of ribs connecting the female mold fitting portion and the annular substrate are formed in the formed groove at a position corresponding to the small gap between the raised portions. It is about technology.
[0002]
[Prior art]
In general, in this type of synthetic resin female member, the inner diameter of the female fitting portion on the opening end side projects the protruding portion from the inner peripheral surface, so that the outer diameter on the distal end side of the protruding portion of the male member Is smaller than Then, when the protruding portion of the male member is fitted and detached, the raised portion is pressed radially outward by the protruding portion, so that the female fitting portion resists the elastic restoring force in the radial direction. It is comprised so that it may expand to a diameter.
[0003]
However, in the conventional synthetic resin female member, a cylindrical peripheral wall portion is located below the raised portion, and this peripheral wall portion becomes a resistance against the elastic deformation of the female fitting portion. The fitting (snap action) tends to be tight. Therefore, if there is even a slight manufacturing error in the inner diameter of the female fitting part on the open end side or the outer diameter of the male part projection, the fitting may become impossible or impossible. As a result, it may be difficult to detach and fit.
[0004]
[Problems to be solved by the invention]
The present invention has been made in consideration of the above points, and the purpose of the present invention is that the raised portion provided on the inner peripheral surface on the upper end side of the female fitting portion is not only in the radial direction, By enabling elastic deformation in the vertical direction (axial direction), there is a slight manufacturing error in the inner diameter of the female fitting portion on the opening end side and the outer diameter of the male member protrusion on the tip side. However, an object of the present invention is to provide a synthetic resin female member for a snap fastener which can prevent the fitting from becoming impossible or the fitting from being removed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the technical means taken by the present invention are as follows. That is, the synthetic resin female mold member for a snap fastener according to the present invention is inclined so as to become lower toward the outer side, and then recessed into the center of the annular substrate hanging downward and on the inner peripheral surface on the upper end side. Is provided with a female fitting portion in which a protruding portion for locking the protruding portion of the male member is formed with a small gap in the circumferential direction, and at the center of the bottom wall of the female fitting portion, A through-hole is formed to insert a protrusion of a rivet member to be driven from one side of the flexible membrane body and fasten it, and the groove formed between the back surface of the annular substrate and the female fitting portion A synthetic resin female member for a snap fastener, in which a plurality of ribs for connecting a female fitting portion and an annular substrate are formed at a position corresponding to a small gap between the portions, the raised portion and the annular substrate While the connecting part is formed thinner than the annular substrate, One between the ribs to each other, and the feature that it has an opening which opens radially.
[0006]
According to the above configuration, at the time of snap action with the protrusion of the male member, the portion that becomes a resistance to the elastic deformation of the female fitting portion, that is, below the raised portion in the conventional synthetic resin female member Since the opening part opened in the radial direction is formed in the part corresponding to the cylindrical peripheral wall part, the elastic part is easily elastically deformed in the radial direction, and the ridge part and the annular substrate are formed. The ridge is elastically deformed not only in the radial direction but also in the vertical direction (axial direction), because the connecting part is formed thin and the opening is formed below the ridge. It becomes possible to do. Therefore, even if there is some manufacturing error in the inner diameter of the opening end side of the female fitting part and the outer diameter of the protrusion part of the male member, it becomes impossible to fit or the fitting is difficult to remove. It can be prevented from becoming.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a snap fastener with a male snap 1 and a female snap 2. The male snap 1 is composed of a male member 1A having a protrusion 3 and a synthetic resin rivet member 5a for fastening the male member 1A to a flexible film body 4a such as clothes. The female snap 2 is composed of a synthetic resin female member 2A and a synthetic resin rivet member 5b for fastening the female member 2A to a flexible film body 4b such as clothes.
[0008]
The detailed configuration of the female member 2A is as follows. That is, as shown in FIG. 2 to FIG. 7, after being inclined so as to become lower toward the outside, in the center of the annular substrate 6 having a sectional shape that hangs downward, it is recessed on the back surface side and on the inner peripheral surface on the upper end side. A raised portion 7 that locks the protruding portion 3 of the male member 1A is provided with a female fitting portion 9 formed in a circumferential direction with a small gap 8 therebetween, and a bottom wall of the female fitting portion 9 A through-hole 12 is formed in the center of 10 for inserting and inserting the protrusion 11 of the rivet member 5b driven from one side of the flexible film body 4b.
[0009]
In the groove 13 formed between the back surface of the annular substrate 6 and the female fitting portion, the female fitting portion 9 and the annular substrate 6 are provided at a position corresponding to the small gap 8 between the raised portions 7, 7. A plurality of (six in the illustrated example) radial ribs 14 to be connected are formed.
[0010]
The connecting portion P between the raised portion 7 and the annular substrate 6 is formed thinner than the annular substrate 6, while the raised portion 7 and the rib 14, below the raised portions 7 and between the ribs 14, 14. 14 and the bottom wall 10 are surrounded, and the opening part 15 opened to radial direction is formed.
[0011]
According to the above configuration, at the time of snap action with the protrusion 3 of the male member 1A, the portion that becomes the resistance against the elastic deformation of the female fitting portion 9, that is, the raised portion of the conventional synthetic resin female member, Since the opening 15 that is opened in the radial direction is formed in a portion corresponding to the cylindrical peripheral wall portion that is positioned below, the elastic deformation of the raised portion 7 in the radial direction is easy even with a slight operating force. Will be done.
[0012]
Moreover, the projecting portion 3 of the male member 1A is formed by the fact that the connecting portion P between the raised portion 7 and the annular substrate 6 is formed thin and the opening 15 is formed below the raised portion 7. 8, as shown by a solid line and a virtual line in FIG. 8, the raised portion 7 is elastically deformed so as to oscillate around the thin connection portion P, so that not only the radial direction but also the vertical direction ( It can be elastically deformed in the axial direction.
[0013]
Therefore, even if there is a slight manufacturing error in the inner diameter of the opening end side of the female fitting portion 9 and the outer diameter of the distal end side of the protruding portion 3 of the male member 1A, the fitting becomes impossible or the fitting is detached. Can be prevented from becoming difficult.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a snap fastener constructed using a synthetic resin female member according to the present invention.
FIG. 2 is a plan view of a female member made of synthetic resin.
FIG. 3 is a side view of a synthetic resin female member.
FIG. 4 is a bottom view of a female member made of synthetic resin.
FIG. 5 is a cross-sectional view taken along line AA in FIG.
6 is a cross-sectional view taken along line BB in FIG.
7 is a cross-sectional view taken along the line CC of FIG. 3;
FIG. 8 is an explanatory diagram of the operation.
[Explanation of symbols]
2A ... Synthetic resin female member, 6 ... annular substrate, 7 ... raised portion, 8 ... small gap, 9 ... female mold fitting portion, 10 ... bottom wall, 12 ... through hole, 13 ... groove, 14 ... rib, 15 ... opening.

Claims (1)

After inclining so as to be lower toward the outer side, a ridge that is recessed in the back surface and engages the protrusion of the male member in the circumferential direction in the center of the annular substrate that hangs downward is provided in the circumferential direction. A female fitting part formed with a small gap is provided continuously, and a protrusion of a rivet member that is driven from one side of the flexible film body is inserted into the center of the bottom wall of the female fitting part. A through hole is formed between the back surface of the annular substrate and the female fitting portion, and the groove formed between the female fitting portion and the female fitting portion is annular at a position corresponding to the small gap between the raised portions. A synthetic resin female member for a snap fastener having a plurality of ribs for connecting to a substrate, wherein a connecting portion between the raised portion and the annular substrate is formed thinner than the annular substrate, An opening that opens in the radial direction is formed below the ribs and between the ribs. Synthetic resin female member for snap fasteners, wherein.

Images