JPS6365321B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Object of the Invention (A) Technical Field of the Invention The present invention relates to the back of a school bag, and the invention is based on the following conventional technology adapted to the child's body position.
It has also been improved so that it can be used in accordance with improved body posture.

(B) Regarding the conventional technology The conventional technology related to the back of the school bag is as shown in Fig. 1A (Utility Model Application No. 57-159719) and B (Utility Model Application No. 55-160469). It is attached to the plate part 30 with a mounting plate 16' so that it cannot be moved from side to side, and also has a holding slide latch as shown in Utility Model Application No. 59-105840 (Fig. 1 C) previously provided by the present applicant. Slide the tool left and right to attach the backpack band 2
There is a technique to expand the mounting width of 9'.

(C) Problems with the prior art With the above-mentioned technology, for example, in the cases shown in Figures 1A and B, it is completely impossible to adjust the left and right width of the shoulder strap 29' on the back. If a child is wide or the shoulder width of the child becomes wider as the child grows, it will not only be very difficult to carry the school bag on and off the back, but it will also be the biggest cause of back damage.

In the case shown in Figure 1C, the above adjustment is possible, but as a result of actual use, the arc-shaped leaf spring was large, so the width between the backpack bands 29 was adjusted by pushing the retaining slide latch and sliding it. A large pressing force is required for adjustment (inconvenient operation), and the entire structure of the back is complicated, making the manufacturing process (forming the slide stop protrusion, convex side, slide stop, etc.) too time-consuming. There are economic difficulties. Therefore, the present invention provides: (a) The attachment widths of the two left and right backpack bands 29 on the back can be freely adjusted according to the child's body position.

(b) Improvements should be made so that the mounting width adjustment work described above can be carried out smoothly.

(c) Back: The overall structure should be simplified to make it easier to operate and to improve the economic efficiency of the product (simplification of the manufacturing process).

The object of the present invention is to provide an invention aimed at improving the above three points.

(2) Structure of the invention (A) Technical means of the present invention In order to achieve the above object, the present invention has the following structure. The drawings show an embodiment, and FIG. 2A is a plan view of the back body, and FIG. 2B is a side view thereof. is manufactured by punching and bending a single metal plate,
The lower surface consists of a fixed bottom plate section 15, the upper surface consists of a widening function section 16, and a hanging fitting mounting section 2 is provided with an appropriate space at the vertical and horizontal center positions of the back body.
1 is a hanging fitting mounting cover that is fitted to the corresponding part 2;
Reference numeral 8 indicates a screw hole for a screw to hang a hanging fitting.
Furthermore, screw holes 19 are provided at both ends of the fixed bottom plate portion 15 for fixing the bottom plate portion 15.

The width expanding function part 16 has a slide groove 3 of an appropriate width along the center line in the left and right longitudinal direction of the hanging fitting mounting part 2.
3 are provided, and a plurality of slide stop grooves 4A to 4D are provided in opposing pairs facing both edges of the slide grooves 3 and 3 and symmetrically. It goes without saying that the intervals between the left and right slide stop grooves 4A to 4D are set so that the slide stop claws 8 of the slide springs 9, which will be described later, can fit therein to stop the slide.

Next, the slide spring 9 will be described. Third
As shown in the figure, the loose fitting part 5 of the band hanging bracket, its rising part 10, and its base are opened approximately at right angles to the left and right, and both front and rear ends are bent upward as appropriate to prevent them from sliding. The band hanging bracket is formed by foot parts 7, 7 having claws 8 formed thereon, and split leg slide springs 6, 6 which are integrated at the center of the outer edges of both leg parts 7, 7 and whose front shape is a split leg shape. It has a structure in which a band hook 13 is loosely fitted into a loosely fitting part 5. The feet 7, 7 of the slide spring 9 and the leg slide springs 6, 6 can be slid into the back main body 1 from both left and right ends, and the rising portion 10 of the loose fitting portion 5 of the band hanging metal fitting can be slid into the back body 1. 〓Insert the slide grooves 3 and 3 so that they can slide, and also install the hanging bracket mounting screw 2 in the hanging bracket mounting part 2.
0 and the hanging fitting mounting cover 17, the hanging fitting 14
The back fixing screw 21 has a structure in which the band hanging fitting loose fitting part 5 and the band hanging fitting 13 loosely fitted in the part are exposed to the outside through a sliding window 11 and a cover 11 is attached. Hanging fitting installation screw 20
However, it is designed to be fixed to the back plate of the school bag 27.

FIG. 4 shows the cover 11, where A is a plan view, 19' is a fixing screw hole, 18' is a screw hole for attaching a hanging bracket, and 23 is a cover retainer for attaching a hanging bracket formed protruding from the back of the cover. It is.

Also, Fig. 5 shows the hanging fitting mounting cover 17, but 24
is the edge hanging part and the center side edge 2 of the back body 1
5 is covered from above (Figure 2)
The inner cavity 26 is configured such that a cover retainer 23 for attaching a hanging fitting of the cover 11 is fitted therein.

(3) Regarding the operation and effects of the invention Since the present invention has the above-described configuration, first, the opening slide spring 6 of the slide spring 9,
The toe portion 28 of 6 is always attached to the fixed bottom plate portion 1 of the back body 1.
5, and the slide stopper claws 8 of the foot parts 7, 7 are in close contact with the back surface of the width expanding function part 16. Then, hold the loose fitting part 5 of the band hanging bracket and push the sliding spring 9 downward. The leg opening sliding spring 6 will spread and the legs 7, 7 will go down, so that the sliding stopper 8 will be on the back side of the widening function part 16. Since it separates from the slide spring 6 to the left and right, the inside of the slide grooves 3 and 3 and the back of the main body 1
You can slide it inside. Therefore, as shown in FIG. 6, if the sliding springs 9, 9 are brought from the left and right to the position of the hanging fittings 14, the foot parts 7,
The slide retaining claws 8 of 7 are slide retaining grooves 4A and 4C.
When the slide springs 9 and 9 enter, the slides stop completely. Next, push the slide springs 9 and 9 downward to remove the slide stopper 8 from its stop grooves 4A and 4C, move it left and right, and move the slide stopper 8 to 4B and 4D.
If you put it in, the slide springs 9 and 9 will stop sliding. Therefore, there are two slide springs 9, 9 on the left and right.
The width between them will be increased by twice the distance between the slide stop grooves 4A and 4B. In other words, the width of the left and right shoulder straps 29 of the school bag is increased. In this way, in the case of the conventional technology shown in FIGS. 1A and B, the attachment width of the shoulder strap 29 on the back can be adjusted, whereas it was not possible to adjust it, and in the case of FIG. Since the leaf spring was long and its elasticity was strong, it was not easy to push the slide stopper and move it from side to side, and then hang the slide stopper on the slide stop protrusion to stop the movement. In this case, the arc-shaped leaf spring and the hold-down slide hook shown in FIG. It is formed within the structure of the holding slide latch fitting shown in FIG. Therefore, the slide springs 9, 9 can be moved (slided) smoothly from side to side even by children's hands. Furthermore, once the school bag is fitted, it will not be unfastened due to the impact of normal use of the school bag, and even if the fitting is released due to a large impact and the slide springs 9 move slightly, the legs will not open. Due to the elasticity of the slide spring 6, the toe portion 28 and the slide stopper 8 are connected to the fixed bottom plate portion 15 and the widening function portion 1.
It has the function and effect of strongly adhering to 6 and not easily moving.

Next, the hanging fitting 14 is hung on the hanging fitting mounting screw 20 within the inner cavity 26 of the hanging fitting mounting cover 17, and furthermore, the hanging fitting mounting cover presser portion 23, which is formed protrudingly at the center of the back surface of the cover 11, is inserted into the inner cavity 26. It has the function and effect of fitting in and stopping unnecessary movement of the hanging fitting 14.

As described above, the present invention allows the attachment width of the backpack band 29 to be freely and reliably adjusted on the back, so it can be adjusted to suit the shoulder width, which increases as the child grows, from the time he enters elementary school to the sixth grade. In addition, it is possible to adjust the school bag accordingly even when the child wears bulky clothes when commuting to school in the winter, which has the advantage that the child can easily put on and take off the school bag.It also prevents excessive stress from being placed on the back, making it possible to adjust the school bag to its maximum capacity. The damage to the damaged part is prevented.

[Brief explanation of drawings]

The drawings show examples, but Figure 1 shows the conventional technology, and A is a utility model application published in 1982.
- The back of 15917, and B is the date of publication of the utility model application.
55-160469, C is a cross-sectional view showing the structure of the utility model registration application No. 105840 of 1982, which the applicant previously provided. FIG. 2A is a plan view of the main body of the present invention, B is a side view, C is a front view, D is a rear view, and E is a sectional view taken along the line BB. FIG. 3A is a plan view of the slide spring, B is a front and rear view, and C is a left and right side view. Figure 4 A is a plan view of the cover, B is a front view, C is a bottom view, D is a sectional view taken along line A-A', and E is B
-B' is a sectional view, F is an explanatory view of mounting the slide spring on the back body, and G is a front view of the back of the present invention. FIG. 5A is a plan view of the hanging fitting mounting cover, B is a rear view, and FIG. 5C is a left and right side view. FIG. 6 is a schematic explanatory diagram showing a state in which the back of the present invention is attached to a school bag and the bag is expanded and slid. 1...Back main body, 2...Hanging bracket attachment part, 3...Slide groove, 4A-4D...Slide stopper groove, 5...Band hanging bracket loose fitting part, 6...Opening leg slide spring, 7...Foot part, 8 ...Slide stopper, 9...〓Slide spring,
DESCRIPTION OF SYMBOLS 11...Cover, 12...Sliding window, 15...Fixed bottom plate part, 16...Width expansion function part.

Claims (1)

[Claims] 1. The upper surface of the main body 1 is a widening function section 16, and the lower surface is a fixed bottom plate section 15, and a hanging fitting mounting section 2 is provided at the vertical and horizontal center positions of the horizontally long back body 1 whose cross section is roughly rectangular. Slide grooves 3, 3 are provided along the center line in the left and right longitudinal direction, and this
With the slide grooves 3 and 3 facing both edges and symmetrically providing a pair of slide stop grooves 4A to 4D to form the width expanding function part 16, the other having one leaf spring,
The bases of the loose fitting part 5 and the rising part 10 of the band hook are opened at right angles on the left and right, and both the front and rear ends thereof are bent upward to form foot parts 7, 7 provided with slide stopper claws 8, and further both the foot parts are formed. 7 and 7 are integrally formed with split-leg slide spring parts 6 and 6 having a split-leg front shape at the center of their outer edges, and constitute a slide spring 9 which also functions as a slide spring 9. The foot parts 7, 7 and the leg opening slide springs 6, 6 can be slid into the back main body 1 from both left and right ends thereof, and the rising part 10 of the loose fitting part 5 of the band hanging bracket is inserted into the slide grooves 3, 3. A hanging fitting 14 is attached to the hanging fitting mounting part 2, and a loose fitting part 5 of the band hanging fitting is attached to the sliding window 12 of the cover 11. The back for a school bag is made by attaching a cover 11 with a fitted band hook 13 exposed to the outside.