JPS5825849Y2 - Back strap for school bag - Google Patents

Description

[Detailed description of the invention] The present invention relates to a backpack strap for school bags, and its purpose is to have a long edge free end side part that is fixed to a buckle at the free end of a small assembly, which is strong and durable, and a long edge shoulder rest. The purpose of the present invention is to provide a shoulder strap that is flexible and comfortable to carry.

The illustrated embodiment will be described below.

1.1 is a pair of left and right long edges attached by winding the proximal end around the ring 11.11 of the mounting bracket 2 fixed to the back of the school bag body and testing it with the stud 12.12. A back plate 4 made of thin leather and formed in the same elongated band shape is sewn to the back side of the upper half of the front plate 3 formed into an elongated band shape with sponge plates 5 and 6 inside to form the shoulder rest 1a.
A plurality of pin insertion holes 7 are arranged in a row in the lower half of the top plate 3 to form a free end side portion 1b.

To be more specific, the shoulder rest 1a is constructed by placing a shape-retaining cardboard 8 of the same shape on a sponge plate 6 having approximately the same shape as the upper half of the top plate 3, and placing the shape-retaining cardboard 8 at the center of the bottom surface of the sponge plate 6. Next, a sponge plate 5 which is sandwiched in between and shorter than the sponge plate 6 is brought into contact with the sponge plate 6, and these are glued together with adhesive, and then placed on the back plate 4 and also glued with adhesive.
The peripheral edge 4a of the back plate 4 is folded back and wrapped around the upper surface of the peripheral edge of the shape-retaining cardboard 8, and also adhered with adhesive, and the overlapped part of the folded back plate 4, cardboard 8, and sponge plate 6 is formed. It is formed by sewing the peripheral edge of the top plate 3.

In this way, the shoulder rest 1a is made up of two polymerized sponge plates 5,
6 has appropriate thickness and flexibility, and since the back plate 4, the sponge plates 5, 6, and the cardboard 8 are integrally bonded, there is no possibility that the shape may deviate or the sponge plates 5, 6 may become uneven. There is no risk of it happening.

In addition, when wrapping the cardboard 8 and the sponge plates 5 and 6 with the backing plate 4, appropriate hardness and regularity are imparted to the backing plate 4, thereby facilitating the wrapping work and subsequent sewing work. .

Furthermore, since there is no sponge plate 5 in the sewn portion of the front plate 3 and the back plate 4, the sewing work can be easily performed.

Reference numeral 9 denotes a reinforcing plate superimposed and fixed on the free end side 1b, which is made of thick leather and formed into an elongated band slightly wider than the free end side 1b. It is superimposed on the back surface of the part 1b with its upper end matching the lower end part of the back plate 4 of the shoulder rest part 1a, and the top plate 3, the cardboard 8, the sponge plate 6, the back plate 4 and the reinforcing plate are attached with the studs 10. At the same time, the free end side 1b of the top plate 3 and the peripheral edge of the reinforcing plate 9 are sewn together.

Note that 7' is a pin insertion hole of the reinforcing plate 9, which is provided in alignment with the pin insertion hole 7.

Further, reference numeral 13 indicates a pair of known flat strings (one of which is not shown) on the left and right sides corresponding to the long edges 1, 1, which are pinned to the free ends (Fig. 1) of the elongated leather strip. A buckle 14 is provided at the base end with a fastener 15 for attaching it to the bottom of a school bag body (not shown).

Then, insert the free end side portions 1b, lb of the long edges 1, 1 into the buckles 14 of the corresponding flat strings 13, and
By inserting and fixing the pin 16 of this buckle 14 into 7', the desired length can be adjusted.

As is clear from the above, according to the present invention,
Since the reinforcing plate is superimposed and fixed on the back side of the free end side of the long edge, the buckle of the flat string mainly comes into contact with this reinforcing plate, so the free end side is strong and durable, and the reinforcing plate is protected against damage. When this happens, only the reinforced plate needs to be replaced, making repairs easy and inexpensive.

In addition, the shoulder rest on the long edge is lined with two pieces of sponge salt, wide and narrow, to give it appropriate thickness and flexibility, so it feels soft on the shoulder and comfortable to carry. Since there is only sponge salt and it is thin enough to at least eliminate the narrow sponge salt, it is not only easier to sew the periphery, but also the periphery is less likely to rub against clothing, etc. The sewn parts are strong and durable.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view showing the long edge and the flat string separated, FIG. FIG. 2 is an enlarged cross-sectional view taken along line II. 1...Long edge, 13...Flat cord, 1a...
...Shoulder rest, 1b... Free end side part, 5, 6.
...Sponge salt, 14...Buckle with pin.

Claims (1)

[Scope of utility model registration request] The free end side part with long edge pin insertion holes for attaching the base end to the upper back side of the school bag body is connected to the buckle with a pin provided at the free end of the small assembly, which also attaches the base end to the bottom of the school bag body. In a back strap for a school bag of the type that can be fastened, a reinforcing plate is overlaid and fastened to the back side of the free end side of the long edge, and a sponge plate with approximately the same width as the shoulder rest is attached to the shoulder rest, and an intermediate piece is attached to the shoulder rest. A back strap for school bags that is made by polymerizing a sponge version with an interior.