JPS60196419A - Push button made of plastic - Google Patents

Abstract

1. Apparatus made from plastic for joining at least two layers of flat material, with a male part (12) having a single. pin (25) and a female part (11) connected in one piece to the male part (12) and having an opening (20) for receiving pin (25), whereof the head (26) having a tip for perforating the material can be locked behind the edges of opening (20) with a recess (27) starting behind head (26), the female part (11) and male part (12) being in the form of a relatively rigid plate, which are interconnected to one another along one edge (13, 14) with the aid of a film hinge (16), characterized in that the head (26) of pin (25) is pyramidal and the dimension of opening (20) in one direction is larger than the cross-section of pin (25) in the same direction, the locking of pin (25) taking place behind the two longitudinal edges of opening (20) and recess (27) is axially parallel starting in each case in the vicinity of the edges of pin (25) cooperating with the longitudinal edges of opening (20).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a master mold part having one pin and a master mold part integrally connected to the master mold part and having an opening into which the pin is inserted. The head of the head relates to a plastic push button fixedly mounted behind the edge of the opening.

BACKGROUND OF THE INVENTION Push buttons of this type made of plastic are already known (Federal Republic of Germany Special Patent No. πF No. 2254352).

This known push button is useful for sealing letter envelopes and the like. This can be made by a single hole in the motherboard part of the push button or passed through an existing hole. The connection between the father and use type parts is made by a relatively long emperor. This emperor is most bendable at its vertical V center.

OBJECTS OF THE INVENTION The basic object of the invention is to provide a push button that can be used to join loose pieces of paper without holes.

In order to achieve this object, the present invention makes the following proposal: the parent and mother mold parts each have the shape of a relatively rigid plate;
They are interconnected by a film hinge along one edge, the head of the pin is made in the form of a pyramid, and the thickness of the hole in one direction is larger than the size of the cross section of the pin in the same direction. . If the push button of this invention is used, it is possible to fix each piece of paper one by one, so the push button can be used in place of a chestnut knob, and has the great advantage of not requiring any special tools. This push button is pressed into place by hand. A film hinge connection of two relatively rigid plates centers the pin in the opening in the matrix portion. This is necessary so that the pushbutton can be installed easily and without looking closely. The pyramidal configuration of the pin head is
Helps penetrate paper with light pressure. The paper that is forced sideways during this piercing can be found on either side of the pin so that the opening is enlarged. 5 with this kind of configuration
- Depending on the size, the push button of this invention can rigidly connect 6 to 8 pieces of paper with a small amount of force.

In order to improve the fixation of the pin, it is effective for the pin to have two axial notches starting from behind the head of the pin in two opposing side areas.

In order to make the push button of this invention particularly simple and 1-1 cheaper to manufacture, the following can be done. That is, the boundary surface of the notch parallel to the axis is a part of the cylindrical surface, and the master mold has a hole on the plane of the boundary surface at a position corresponding to the cross section of the cylindrical surface. During manufacture, this hole can be made together with a notch by means of a projection attached to the mold half, so that no complicated mold is required for the manufacture of the push button.

In particular, it is advantageous in a development of the invention for the pin to have a rectangular cross section and to be provided with a recess on its narrow side. If the pin is of rectangular construction, the pyramidal head of the pin can be made particularly easily. It can of course be rounded, but then under any circumstances an additional -
6 - Countermeasures are needed.

It can advantageously be provided that the long side of the cross section of the pin is parallel to the interconnected edges of the master and master mold parts.

Historically, the opening of the matrix can be made longer. In that case, the vertical length of this opening I] part d - Father EJ
perpendicular to the interconnected edges of the mold parts. As a result, the longitudinal depth of the opening is also perpendicular to the longitudinal length of the cross section of the pin. The pin thus engages with its narrow side behind the edge of the opening, while the sides of the pin still have A
A 1 minute free opening remains into which the edge of the paper to be pierced can be placed.

Furthermore, the thickness of the matrix portion can be reduced in the area around the opening provided for locking the head of the pin. In this way, the pin can easily fit into the opening without compromising the rigidity of the master part. In order to facilitate the insertion of the pin head and to improve its fixation, it can likewise be provided that the edge of the matrix part facing the pin and the opening is at least partially captured. That is, in combination with the pyramidal head of the pin, it centers the pin as it hits the opening, making penetration of the pin easier as it slides down the slope.

Furthermore, the film hinge can have a symmetrical notch at its free end. The film hinge is formed by a narrow region of reduced overall thickness, the longitudinal edges of which transition into a plate-like mother-father part. This will create a notch on the end face of the film hinge. In that case, the bond line between the deepest positions of the cuts can be parallel to the bond edges of the parent 1υ-shaped part and centered between these bond edges. This ensures that the actual axis around which the parent/matrix part can be pivoted by the film hinge is precisely defined, so that the desired exact alignment of the pin with respect to the opening is guaranteed in all cases. Nigaru.

Due to the thickening of the N-shaped part, an intruding pin, a bead surrounding the opening on the side facing the father part can be provided. This bead provides a second advantage. This is because the bead prevents the tip of the pin from protruding to the opposite side of the matrix part. Therefore, the user does not feel the tip of the pin.

In particular, the father part and the mother part are rectangles with rounded corners,
It is advantageous if they are interconnected at the end faces. −
1' assists in centering the pins aligned in the opening.

- Further details will be given regarding the figures showing the embodiments.

The push button shown in the plan view of FIG. 1 has a master part 11 and a master part 12. The two parts are in the form of rectangular plates, the opposite ends of which are rounded into semicircles. The facing end faces 12 and 14 are integrally connected by a thin plastic plate 15 forming a film hinge 16. Since the end faces 13 of the master mold part 11 and the end faces 4 of the master mold part 12 are parallel to each other, the film hinge 16 likewise has parallel outer edges. The film hinges 16 each have one trapezoidal cutout 17 in the region of their free ends.
, the longitudinal length of the film hinge 16 is shortest at the center between the two end edges 13 and 14. Therefore, the paternal part] 2 is paired with the maternal part 11)
When pivoting, care is taken that the pivoting is done around the part of the hinge that bends most easily, that is, the center axis of the hinge.4 However, this means that the two end faces 13 and
remain parallel to each other, so that when folded back, the father part 12+IE will be exactly above the ten part 11. Father of rJ type part H (longitudinal edge of part 11 12) 8 and 1
9 is also parallel in the folded/twisted state.

The matrix part 11 has an elongated opening 20 in its center. The longitudinal dimension of this opening 20 is about three times the width. The longitudinal axis of the opening 20 is centered between the longitudinal edges 18 and 18 of the matrix part 11 and is +1. Both are in the same direction. Adjacent to the opening 20 in the lateral direction are two regions 21, an IJ-shaped portion]1, which are thin.

Two longitudinally identical regions 22 adjacent to the opening 20
, which is thicker than region 21 and thinner than other parts.

The matrix portion 11 has a thick portion 23 outside the regions 21 and 22, and the outer periphery of the thick portion has an elliptical shape.

10- The thick wall portion 23 extends to the thinner region 21 in the region of the long edge 18 of the matrix portion 11.

The father part 12 has a circular hole 24 centered on its longitudinal axis.

Between these holes there is a pin 25 shown in chain lines on the back side of the father part 12. This pin 25 has a rectangular cross section, the longitudinal dimension of the cross section extends parallel to the end edge 14 and perpendicular to the longitudinal edge of the father part 12, and the hole 24 It is slightly larger than the distance between the edges. pin 2
The head of 5 has the shape of a pyramid, also shown in dashed lines. .

FIG. 2 shows a cross section of the push button shown in FIG. It can be seen that the pin 25 is provided on the opposite side from the reinforcing build 23. Also shown is the pyramidal head 26 of the pin 25. The tip of this head points downward. The distance 25 from the fold line of the film hinge 16 determined by the pin 25 and the notch 17 is the same as the distance between the fold line thus determined and the center of the longitudinal dimension of the opening 20. Therefore, when the push button is folded to the center of the film hinge 6, the pin 25 will be at the center of the opening 20.

The size of the cross section of the pin 25 in the longitudinal direction is slightly larger than the width of the opening 20 in the lateral direction. The pins 25 each have an axis-parallel recess 27 only in the region of their end edges.

This cutout begins immediately after the head 26 and continues into the hole 24. As a result, the pin 25 has a longitudinal dimension in its cross section that is slightly larger in the region of its head 26 than in the region of its body. When the head 26 of the pin 25 passes through the opening 20, the pin is secured within the opening 20 by the head 26 being more flared than the body.

FIG. 3 further shows the position of the axis-parallel cutout 27 and the hole 24, the boundary wall of the cutout 27 being in the same plane as the hole 24 of the father part 12. In the mold for producing the pushbutton, a cylindrical extension is simply provided at this location, which makes both the hole 24 and the notch 27 coplanar with this hole.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.

The mother mold part 11 has been cut away and the father mold part 12 is shown in side view. In this example, five layers of paper 29 are closely fixed to each other by push buttons.

In this case as well, the relative positions of the hole 24 and the notch 27 parallel to the axis are shown. The pyramidal head 26 of the pin 25 is the third
Both in the figure and in Figure 4, it is a triangle.

The head 26 engages with the rear edge of the opening 20 by means of a notch 27 . The edges of the narrow-diameter regions 21 of the square portions 11 each have a slope 31, which simultaneously acts as a centering head 26 of the pin 25 when the pin enters, so that the pin is located at the rear of the edge. Makes it easier to penetrate.

The push button proposed by this invention is used instead of a recessed clamp. These recessed clamps must be pushed through the stacking paper using a single device. The pushbutton of this invention can be installed without such a device.

(The clamps can be made of metal, since the materials do not rust.) The push buttons do not need to be removed when the document is discarded.

This is because the push button can be crushed together with the paper in a shredder. The push button is not magnetic, so
Can be used with magnetic data carriers.

[Brief explanation of drawings]

Figure 1 is a plan view of the unfolded push button, Figure 2 is a sectional view taken along the - dash line in Figure 1, Figure 3 is a cross-sectional view of the folded push button similar to Figure 2, and an enlarged dimensional drawing. Figure 4 is IV- of Figure 3.
FIG. 3 is a cross-sectional view taken along line IV. Reference numeral 11 in the figure: Maternal type part, 12: Father type part, 13, 14
... Edge, 16... Film hinge, 20... Opening, 25... Pin, 26... Head of 25. Agent: Hikaru Esaki Good agent: Fumi Esaki 14-

Claims (1)

[Claims] 1) A father part (12) having one pin (25) and a mother part (11) integrally connected to this father part.
The matrix part has an opening (20) for receiving the pin (25), and the head (26) of the pin has an opening (20) for receiving the pin (25).
), which can be fixed behind the edge of the plastic push button, in which the mother part (o) and the father part (12) have the shape of a relatively rigid plate, and the mother part (o) and the father part (12) have the shape of a relatively rigid plate; (1,3
, 14) are interconnected by a film hinge (16), the head (26) of the pin (25) is configured in the form of a pyramid, and the size of the opening (20) in one direction is larger than the cross-sectional thickness of the pin (25) in the same direction. 2) The pin (25) cuts in the region of the two opposing surfaces an axis-parallel notch (27) starting from the rear of the head (26) -
The push button according to claim 1), wherein the push button has two push buttons. 3) The boundary surface of the notch (27) is a cylindrical surface,
The push button according to claim 1) or 2), wherein the master part (12) has a hole (24) corresponding to the cross section of this cylindrical surface and coplanar with the boundary surface. 4) The pin (25) has a rectangular groove cross section, and the notch (
The push button according to any one of claims 1) to 3), wherein 27) is provided in a region of the narrow side surface. 5) The larger part of the cross section of the pin (25) is parallel to the mutually connected edges (18, 14) of the father part (12) and the mother part (11). ) The push button described. 6) the opening (20) of the father-shaped part (12) is of elongated shape, the longitudinal axis being perpendicular to the edges (13, 14);
A push button according to any one of claims 1) to 5). 7) Claim 1), wherein the matrix part (11) is thinned in a region (21) surrounding the opening (20) and provided for locking the head (26) of the pin (25). ~6)
The push button described in any of -. 8) directed towards the pin (25) and the opening (20);
The push button according to any one of claims 1) to 7), wherein at least a portion of the edge of the matrix portion (11) is a slope. 9) Claims 1) to 8, in which the film hinge (16) has a symmetrical incision (17) in the region of its free end.
) any of the push buttons listed in -. 10) According to claim 9), the connecting line between the latest positions is parallel to the incision (17) and extends centrally between the interconnected edges (13, 14). Push the button. II) On the side opposite the pin (25) into which the fU-shaped part (11) enters, a bead (23) surrounding the opening (20)
The push button according to any one of claims 1) to 0), which has the following. 12) The father part (12) and the mother part (11) are rectangular and are connected to each other along the edges (13, 1, 4), and the edges (1, 8, 14) The push button according to any one of claims 1) to 11), wherein the opposite end is rounded.