JPS6314655Y2 - - Google Patents

Description

[Detailed explanation of the invention] (A) Purpose of the invention (1) Industrial application field and conventional technology The invention relates to the improvement of school bags.

Conventionally, the backpack strap of this type of school bag has been attached to a band mounting bracket that is constructed by placing the back on the center of the back plate of the school bag and a lid fastening device attached to the bottom at a certain interval. .
However, as the body posture of schoolchildren has recently improved and their shoulder widths have become larger, it has become extremely uncomfortable to carry and take off school bags from their backs.In order to alleviate this problem, devices have been devised to make the backpack band as wide as possible when attaching it to the band mounting bracket. It's here.

(2) Problems to be solved by the present invention The conventional technology is as described above, but as shown in FIG. The actual situation is that the technology to increase the length H of the base of the triangular shape has its limits, and it is not possible to sufficiently solve the difficulty of carrying a school bag by improving the body position. This was because the applicant was limited only to the width for attaching the two backpack bands 12 to the band attachment fittings 14, but the applicant changed his thinking and the present invention solves the above-mentioned inconvenience by improving the back. The aim is to provide a school bag that meets the needs of children.

(B) Regarding the structure of the invention In order to solve the above problems, the invention has the following structure. This will be explained with reference to the drawings which are examples.

First, although it is a conventional back 13', the band hook 8 is attached to the fixing plate 1' as shown in the front explanatory view of FIG.
Since it is rotatably latched to a latch 15 fixed to the back, it is impossible to adjust the attachment width of the backpack band 12 at the back 13'.

On the other hand, FIG. 1 is a plan view of an embodiment of the spine 13 of the present invention, in which the slide window 2 of the slide hook 5 is held at a slightly upper position of the fixing plate 1 from the vertical center line to the left and right. Figure 1B,
As shown in C, both long sides of the sliding window 2 are bent inward to form a convex shape, and slide stop protrusions 4 are formed at appropriate positions on the convex sides 3, and both sides of the slide stop protrusions 4 are formed. The width of the convex side portion is formed to be equal to the distance over which the holding slide hook 5 slides. On the other hand, the holding slide latch 5 that slides left and right on the convex side 3 is formed in a curved shape, and at first glance has a shape that closely resembles the outer circumference of the rail cross section, and its lower end can be moved left and right by an appropriate width. The legs are opened, and a notch 6 and a slide stopper 7 are formed in the opened parts. The slide stopper piece 7 is adapted to engage on the convex side portion 3 when sliding from side to side, and the notch width of the notch portion 6 is wide enough to allow the slide stopper convex portion 4 to fit therein. In this embodiment, the sliding stop protrusion 4 provided on the convex side 3 of the sliding window 2 is formed in the center of the convex side 3 to have the same or slightly smaller width as the notch 6. The hold-down slide latch 5 is configured to slide to the left and right of the slide-stop protrusion 4 by the width of the notch 6 (therefore, the width of the slide-stop protrusion 4).

The band hooking fitting 8 is fitted into the curved inside of the holding slide hooking fitting 5, and the slide stopper piece 7 is further engaged on the convex side portion 3, that is, the slide stopping convex portion 4 is fitted into one of the notches 6. Then, fit the band hook 8 and the holding slide hook 5 into the sliding window 2 from inside the window 2, and then bring the arc upper surface into close contact with the slide stopper 7 to overlap the arc-shaped leaf spring 9. Then, set an appropriate distance between the back cover 10 and the arc-shaped leaf spring 9 (minimum distance from the top of the slide-stop protrusion 4 to the thickness of the push-hold slide latch 5 plus the height h of the arc-shaped leaf spring 9). ) is installed.

Note that 16 is a hanging metal fitting, and 17 is a holding screw for the hanging metal fitting and also a fastening screw for connecting the fixing plate 1 to the arc-shaped plate spring 9 and the back cover 10.

Next, the back 13 configured as described above is attached to the upper part of the school bag back plate 11, and the backpack band 12 is attached to the band hook 8 and the band attachment fitting 14 of the lid fastening device 18. The hold-down slide latch 5 slides left and right, respectively, by the width of the slide-stop protrusion 4 and the notch 6 (distance twice the width of the slide-stop protrusion or the notch) centering on the slide-stop protrusion 4. A school bag is constructed.

(C) Function of the device Since the device has the above-described configuration, the child can easily hold the school bag 19 by moving and widening the holding slide hook 5 on the back 13 to the left and right as the child's body position improves. You can carry it on your back easily. That is, the height is 13
When trying to move the two backpack bands 12 that are hooked on the band hooks 8 to the left and right around the hanger 16, press the hold-down slide hook 5 and the slide stop pieces 7 will move into an arc shape. Since the leaf spring 9 is pressed in the direction shown by the arrow shown in FIG. 3D (the arrow indicates the pressing direction), the leaf spring 9 tilts in both longitudinal directions around the fastening screw 17 as shown by the dotted lines and slides into the stopper. 7 is disengaged from the slide stop protrusion 4 (therefore, it is removed from the notch 6), and the slide stopper 7 of the hold-down slide latch 5 is disengaged from the slide stop protrusion 4 as shown in FIG. 1C. 4, it can be slid left and right between its top and the arc-shaped plate spring 9. Therefore, the distance between the two backpack bands 12 on the back 13 can be limited by the sliding distance of the slide hook 5 (accurately). (The width is twice the sliding distance of one holding slide latch.) Can be expanded.

(D) Effects of the invention This invention has the above-mentioned structure and function.As shown in Figure 6, the shoulder width 20 becomes wider as the child's body position improves, and when the child puts his arms through the backpack band 12 and carries the child on his back. Conventionally, the backpack band 12 is almost in the form of an isosceles triangle, and its apex is fixed, so it is extremely uncomfortable both when passing the arm through the backpack band 12 (carrying the school bag on one's back) and when removing the arm (putting down the school bag). However, by sliding the hold-down slide hook 5 to the left and right as shown by the arrows and dotted lines, the attachment position of the backpack band 12 is expanded at the back 13, making it much easier to put the arm through or take it out. There is a great advantage for children, who can wear their school bags in a natural manner without having to put them on and take them off.

[Brief explanation of the drawing]

The drawings show an embodiment, and Fig. 1A is a plan view of the back used in the school bag of the present invention, and Fig. 1B is a sectional view taken along the line A-B, showing how the holding slide latch is engaged with the sliding protrusion. C shows the state when the engagement is released and is in the sliding state, and D is a front view. Figure 2 is a back view of the back of this invention, and Figure 3A shows a part of the internal structure with the back cover removed, and the dotted lines indicate the positions of the sliding window and the locking slide latch. be. B
1 is a plan view of the arc-shaped leaf spring, C is its side view, D is its front view, and the dotted line shows the state of change of the arc-shaped leaf spring when pressed by the holding slide latch.
FIG. 4 shows a state in which the back cover and the arc-shaped leaf spring have been removed and the holding slide latch has been fitted into the sliding window of the fixed plate. Figure 5 shows the holding slide latch, A is a top view, B is a front view, C is a bottom view, and D
is a side view. FIG. 6 is an explanatory diagram of the function, FIG. 7 is a perspective explanatory diagram of the school bag of the present invention, and FIG. 8 is a plan view of the conventional back. DESCRIPTION OF SYMBOLS 1...Fixing plate, 2...Sliding window, 3...Convex side part, 4...Slide stop convex part, 5...Pressure slide hook, 6...Notch part, 7...Slide stopper, 8... Band hanging bracket, 9... Arc-shaped leaf spring, 1
0...back cover, 11...back plate, 12...back strap, 13...back.

Claims (1)

[Scope of utility model registration request] Slide window 2 symmetrically from the center line of fixed plate 1
is provided, both longitudinal sides thereof are bent inward to form a convex shape, and a slide stop convex portion 4 is formed at an appropriate position on this convex side portion 3, while a press stop slide latch 5 is formed in a curved shape. The left and right lower ends are opened to the left and right to an appropriate width, a notch 6 and a slide stopper 7 are formed in the opened parts, and a band hook 8 is inserted into the curved inside of the slide window 2 so that the convex part is opened from the inside of the slide window 2. This structure has a structure in which the slide stopper 7 is engaged with the side part 3, the slide window 2 is fitted and inserted, and the arcuate upper surface is brought into close contact with the slide stopper 7, the arc-shaped leaf spring 9 is overlapped, and the back cover 10 is attached. This school bag is characterized in that a back plate 13 is attached to the upper part of a school bag back plate 11, and a backpack band 12 is wrapped around a band hook 8.