JPH0331441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slider for a slide fastener, particularly a slider made of synthetic resin.

Fasteners made of synthetic resin, a type of fastener, are light and colorful, do not rust even after washing, and are as durable as metal fasteners, so they are now used for bags and clothing. It is widely used in sports equipment, etc.

By the way, the body of a slider for opening and closing a conventional synthetic resin fastener is generally made of metal because it is easy to assemble and mold, and the conventional synthetic resin slider has the following problems. put it here,
FIG. 1 is a side view showing an example of a conventional synthetic resin slider used in a synthetic resin fastener. As shown in this figure, this conventional synthetic resin slider 1 has a pull retaining ring 3 protruding from the upper surface of a slider main body 2 and having a substantially inverted U-shaped side surface. In this case, the front lower surface 3a of the pull retaining ring 3 is integrally connected to the slider body 2, but the rear lower surface 3b is separated from the upper surface of the slider body 2 by a gap 4. In this slider 1, the handle 5
When attaching the handle, the locking rod part 7 of the fitting hole 6 provided in the pull handle 5 is inserted through the gap 4, and the fitting hole 6 of the pull handle 5 is rotatably attached to the pull holding ring 3, and then the high frequency The rear lower surface 3a of the pull retaining ring 3 and the slider body 2 are bonded together using adhesive or adhesive to close the gap 4 and attach the pull handle 5. However, since this type of slider body is mostly made of plastic belonging to crystalline resins such as polyacetal and nylon, it has extremely poor adhesion reliability, and currently suffers from high costs and unstable quality due to adhesion. It is.

Therefore, as a synthetic resin slider that can eliminate the inconvenience caused by such adhesion, the slider shown in Fig. 2A and
The following is proposed. As shown in FIG. 2A, this slider has a male portion 10 protruding from the center of the upper surface of the slider body 8, which has a V-shape extending laterally and has hook portions 9, 9 formed at its tip.
Fitting grooves 11, 11 lower than the top surface of the slider main body 8 are integrally molded in plastic from both ends of the male part 10 in the front-rear direction, while a handle holding female frame 12 that fits into the male part 10 has a lateral direction. Almost an inverted U extending to
Engagement parts 15, 15 are formed with holding holes 14 formed in the horizontal planes 13, 13 at the lower surfaces of their tips, and a handle 16, which is rotatably inserted into and held by the handle holding female frame 12, has a front part that passes through the handle. A pull insertion hole 18 is formed at the rear of the hole 17. During assembly, after inserting either one of the hooks 9 of the slider body 8 into the pull insertion hole 18 of the handle 16, the engaging parts 15, 15 of the handle holding female frame are inserted into the hooks 9 of the slider body 8,
9 and press from above, the engaging parts 15, 15 of the female handle holding frame 12 are fitted into the fitting grooves 11, 11 of the slider body 8, and the slider is moved as shown in FIG. The main body 8 and the handle 16 are integrated.

However, in such a conventional synthetic resin slider, when the handle holding female frame 12 is attached to the slider body 8, if the pull holding female frame 12 is pressed with uneven force, one of the engaging parts 15 will disturb the other engaging part. Not only is there an inconvenience that the other engaging part 15 is not fitted into the corresponding fitting groove part 11 because the other engaging part 15 is fitted into the fitting groove part 11 before the other engaging part 15, but also the handle is attached separately from the slider body 8. There is a problem that the holding female frame 12 needs to be molded, which increases the number of parts and requires a large number of molds. Furthermore, in the synthetic resin slider shown in FIG. 2, the hooks 9, 9 on the slider body 8 are formed to protrude above the upper surface of the slider body 8 at intervals, so that they are resistant to the pull tab 16. If an external tensile force is applied, there is a risk that the hook portion 9 will deform and the pull handle 16 and the pull retainer female frame 2 will separate from the slider body 8.
Further, since the hook portion 9 largely protrudes into the internal space of the handle holding female frame 12, there is a problem in that the rotational operation range of the handle 16 is also limited.

In view of the above points, this invention allows the pull and the slider body to be integrated even when uneven force is applied during assembly, reduces the number of parts, and provides sufficient assembly strength. An object of the present invention is to provide a synthetic resin slider for a slide fastener that is easy to use and has the following properties.

And to achieve this objective, the slider for a slide fastener according to the invention has a slider body 2, as shown in the drawings corresponding to the embodiments.
0, an arch-shaped pull holding frame 33 provided on the upper surface of the slider main body 20 in the front-rear direction, and a pull handle 30 connected to the pull holding frame 33 by inserting the pull insertion hole 31 at the base freely, The handle holding frame 33
, the front end fixing part 22 is connected to the slider main body 20.
In the slider for a slide fastener, which is integrally formed with the upper surface of the front part of the slide fastener by integrally molding it with a synthetic resin, a hook part 25 is integrally formed at the lower end of the rear end part of the handle holding frame 33 and protrudes forward. , the slider body 20 facing the hook portion 25
A block-shaped protrusion 28 is integrally formed on the upper surface of the slider body 20 and a recess 32 is formed on the upper surface of the slider body 20 that is in contact with the lower surface of the rear half of the block-shaped protrusion 28. The lower surface and both sides of the lower surface of the rear half are continuously molded integrally with the flesh of the slider body 20, and the rear surface and upper surface of the slider body 20 and the rear end have a fitting groove 27 that is continuous with the recess 32. The hook portion 25 and the recess 32 of the fitting groove 27 are elastically engaged and locked.

The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 3 is a side view showing an example of the structure of a slider according to the present invention. In this figure, reference numeral 20 denotes a slider body made of synthetic resin, and a fixing portion 22 of a pull holding frame 33 is formed near the front end of an upper surface 21 of this slider body 20. The fixing part 22 is formed into a trapezoidal shape whose cross section becomes gradually narrower as the distance from the upper surface 21 increases.
A neck portion 23 is formed on the distal end side of this fixing portion 22 . The neck portion 23 has a cross section narrower than the cross section on the distal end side of the fixing portion 22.
An arch-shaped pull holding frame main body 24 is formed on the distal end side of the handle 3. This pull holding frame main body 24 is provided slightly obliquely with respect to the upper surface 21 of the slider main body 20, and this pull holding frame main body 24
A hook portion 25 is provided on the distal end side. Hook part 2
5 has a convex portion 26 projecting toward the fixing portion 22 side.

Further, a fitting groove 27 having a width slightly wider than the thickness of the hook portion 25 is formed at the rear of the upper surface 21 of the slider body 20. This fitting groove 27 is an engagement recess into which the hook portion 25 is fitted, and a portion thereof protrudes into the fitting groove 27 in front of the fitting groove 27, and the upper surface A block-shaped protrusion 28 is formed that protrudes above 21. The protrusion 28 is formed in a trapezoidal shape, and its thickness is approximately equal to the thickness of the hook portion 25.

Further, the lower surface of the first half and both sides of the lower surface of the projection 28 are continuously molded integrally with the flesh portion of the slider body 20.

On the other hand, a pull insertion hole 31 is formed near the rear end of the pull 30 that is integrated with the slider portion 29 configured as described above. The pull insertion hole 31 is formed to be larger in width and thickness than the pull holding frame 33, and as shown in FIG. 4, after the pull holding frame 33 is inserted into the pull insertion hole 31,
When the handle holding frame 33 is pressed from above, it is elastically deformed downward around the neck 23, and
When the convex portion 26 comes into contact with the protrusion 28, the handle holding frame main body 24 is elastically deformed linearly, and the hook portion 25 is moved rearward, and the hook portion 25 is fitted into the fitting groove 27. , the convex portion 26 is inserted into the concave portion 32 formed by the protrusion 28 and the fitting groove 27.
are fitted, and the pull tab 30 and the slider portion 29 are integrated.

In this way, according to this slider, the fixed part 2
2. Since a gap 34 is provided on one side of the pull holding frame 33 consisting of the neck portion 23, the pull holding frame main body 24, and the hook portion 25, the lock portion 35 of the pull handle 30 is connected between the bottom surface 36 of the hook portion 35 and the protrusion 28. Just by pressing the handle 30 backwards by bringing it into contact with one tapered part 37,
The neck portion 23 is elastically deformed, the hook portion 25 moves upward, and the gap 34 widens, so that the lock portion 35 can be easily inserted into the inside of the pull-holding frame 33, and after this, the pull-holding frame main body 24 can be inserted. By simply pressing from above, the neck 23 and the pull holding frame main body 24 are elastically deformed, the hook 25 moves downward and forward, and the hook 25 is fitted into the fitting groove 27, as shown in FIG. As shown in FIG.
Fixed by In this case, no matter which part of the pull holding frame body 24 is pressed, the pull holding frame body 24 and the neck 23 are elastically deformed in the same way, so even if uneven force is applied, the slider part 29 and the pull 30 can be integrated. Further, in this case, if the gap 34 between the hook portion 25 and the protrusion 28 is made as narrow as permitted by the mold structure, residual stress in the neck portion 23 after assembly can be reduced.

Further, according to this slider, the slider body 20
The slider portion 29 and the pull handle 30 are integrally molded from synthetic resin.
The slider can be configured with only these parts, and the number of parts can be kept to two.

In addition, in this slider, the handle holding frame 3
3 and the slider body 20, and when the hook portion 25 is fitted into the recess 32, the upper surface 2 of the pull holding frame 33 and the slider body 20
Since the handle holding hole 40 formed by the handle 1 and the pull handle 1 has a substantially elliptical shape, when the handle 30 is pulled rearward, the engaging lever 35 of the handle 30 moves upward and the handle 30 is held in place. Press the holding frame 24 upwards,
This increases the contact pressure between the convex portions 26 and the protrusions 28, increasing the frictional force between the convex portions 26 and the protrusions 28. Further, the protrusion 28 has both sides of the lower surface of the front half and the lower surface of the rear half of the protrusion 28 facing the slider body 28.
Since it is formed integrally with the flesh part of the upper surface and is reinforced, it will not deform even if a strong force is applied by the pull handle 30. Therefore, even when the pull handle 30 is pulled with such a large force, the locking force of the slider portion 29 can be increased accordingly, and durability against large pulling force can be ensured. Can be done. In this case, the engaging portion 41 of the convex portion 26 and the engaging portion 42 of the protrusion 28 may be shaped into a sawtooth shape or the like to further increase the frictional force.

As explained above, according to the slider for a slide fastener according to the present invention, the handle holding frame 33
has a structure in which the front end side is integrally and continuously formed on the slider body 20 and the rear end side is pressed and engaged, so it is extremely easy to assemble by simply pressing down on the rear end side of the pull handle holding frame 33. Even if uneven force is applied to the pull holding frame during work, the pull holding frame and the slider body are easily and reliably engaged and integrated.

Furthermore, the number of parts constituting the slider can be reduced to just two.

Furthermore, the projection 28 that engages and holds the rear end hook portion 25 of the pull handle holding frame 33 has a lower surface of the front half and both sides of the rear half integrally molded with the meat part of the slider body 20, and the rear half of the projection 28 Due to the reinforcing structure in which an engaging recess 32 is formed on the upper surface of the slider main body 20 which is in contact with the lower surface in the middle of It never comes off.

Further, the height of the protrusion 28 may be kept to a minimum level, and the movement range of the handle 30 is not restricted.

Further, a recess 32 at the inner end of the fitting groove 27 is engaged with the rear end hook 25 of the pull holding frame 33 by the above-mentioned lower pressure.
is a protrusion 2 protruding from the top surface of the slider body 20.
8, sufficient engagement strength can be obtained without increasing the thickness of the slider body 20.

Further, the fitting groove 27 is formed in the slider body 20.
The handle holding frame 3 has a shape that opens on the rear and upper surfaces and continues to the recess 32 on the lower surface of the protrusion 28.
3, the rear end of the pull holding frame 33 does not protrude to the rear of the slider body 20, and since the fitting groove 27 is located at a shallow position on the top surface of the slider body 20, the length of the pull holding frame 33 is reduced. It is also short and can be formed compactly.

Furthermore, when the pull handle 30 is strongly pulled horizontally backward in FIG. This type of slider can be used safely without deforming or damaging the handle holding frame 33.

Furthermore, since the projection 27 is housed within the inner wall surface of the handle holding frame 33, there is no risk of detracting from the beauty or usability of the slider.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a conventional plastic slider, FIGS. 2A and 2B are side views showing other examples of a conventional plastic slider, and FIG. 3 is a side view showing an example of a conventional plastic slider. A side view showing one embodiment of the slider, and FIGS. 4 and 5 are perspective views of the same embodiment, respectively. 20...Slider body, 21...Top surface of slider body, 22...Fixing part, 23...Neck, 24...
...Handle holding frame body, 25...Hook portion, 27...Fitting groove, 32...Recess.

Claims (1)

[Claims] 1. A slider body 20, an arch-shaped pull holding frame 33 provided in the front-rear direction on the upper surface of the slider body 20, and a pull insertion hole 31 at the base of the pull holding frame 33.
is loosely extrapolated and combined with the pull handle 30,
The pull holding frame 33 is located behind the pull holding frame 33 in a slider for a slide fastener in which the front end fixing part 22 is integrally molded with the upper surface of the front part of the slider body 20 from synthetic resin and is continuously formed. A hook portion 25 is integrally formed to protrude forward in the lower end of the end portion, and the slider body 20 faces the hook portion 25.
A block-shaped protrusion 28 is integrally formed on the upper surface of the slider body 20 and a recess 32 is formed on the upper surface of the slider body 20 that is in contact with the lower surface of the rear half of the block-shaped protrusion 28. The lower surface and both sides of the lower surface of the rear half are continuously molded integrally with the flesh part of the slider body 20, and the rear surface and the upper surface of the rear end of the slider body 20 have a fitting groove 27 that is continuous with the recess 32. A slider for a slide fastener, wherein the hook portion 25 and the recess 32 of the fitting groove 27 are elastically engaged and locked.