JPS6142410Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to school bags.

Conventional school bags are, for example, published in Japanese Patent Application Laid-Open No. 52-12082.
As shown in the above publication, a cushioning material (cotton, sponge, etc.) is provided inside the back plate to provide cushioning properties to the back plate. However, this backboard does not always come into contact with the user's back during use, which means that when running, the school bag may bounce off the user's back using the fastening part at the top of the backpack band as a fulcrum, or cause collisions. There is a problem that the feeling of use is very bad because it bumps against the surface. This is especially a big problem for children in lower grades who lack physical strength.

This phenomenon is severe because the school bag has a rectangular parallelepiped structure with the back plate in contact with the back serving as a vertical reference plane.

In order to solve the above-mentioned problems, the present invention is designed so that the main body of the school bag is carried on the back at a pre-jumped angle, and the bouncing between the main body and the back at that angle is reduced.

More specifically, the upper end of the backrest band is fastened and fixed to the upper center of the back surface of the school bag body, and the upper end of the backrest plate is pivoted to the lower side of the fastening, and the lower end of the backrest plate and the back surface The main body of the school bag can be held at a required angle of inclination from the pivot to the back support plate between the lower end and the swing of the main body of the school bag in the direction approaching the back support plate using the pivot support as a fulcrum can be buffered. It is characterized by having a structure in which an elastic element is provided.

An embodiment of the present invention will be described below based on the drawings. In the figure, a indicates a back support plate, and the back support plate a is formed of a thin plate and has a substantially triangular shape on the back so that it can come into contact with the user's back. In addition, there are many ventilation holes on the entire surface.
Drill a ₁ . Furthermore, the planar cross section is bent into a curved shape so that it can hold the lower back of the user, and the upper and lower ends have mounting portions a ₂ , a ₂ formed by winding into a cylindrical shape to be attached to the back plate 1. They are each made of hard synthetic resin or reinforced plastic.

The back support plate a has attachment parts a ₂ and a ₂ at the upper end, and a backpack band B at the center of the upper part of the back surface A ₁ of the school bag body A.
The fastening part A that fixes the upper end is pivotally supported by the connecting shaft 2 on the support part 1a formed by wrapping around the upper end of _the back plate 1 at the lower side of the 2 lower side, and the lower end is attached to the lower end of the back plate 1. The school bag body A is attached to the back support plate a through the elastic element b, and the school bag body A is attached to the back support plate a at a required inclination angle based on the two axes of the connecting shaft, that is, the school bag body A bounces off the back at a point where the lower part of the school bag body is away from the lower end of the back support plate. It is held in a state in which it is held in the same position and is able to swing freely in the direction toward and away from the back rest plate a with the two rotational axes as fulcrums, and furthermore, the swing in the direction toward the back rest plate a is damped by the elastic element b. Make it.

The elastic element b is, for example, a spring, and may be a coil spring, a plate spring, a piece of sponge, etc., but preferably includes a bullet piece b ₁ made of a thin steel plate with a substantially triangular cross section and a curved lower part, as shown in the figure. Laterally elongated support parts b ₂ , b ₂ are rolled up into a cylindrical shape on both open edges of the upper end of the piece b ₁ , and elongated support frames _{b 3 ,} b ₃ are inserted into the support parts b ₂ , b 2 , The supporting frames b ₃ , _{b 3 that} can protrude from both ends of the supporting parts b 2 , b ₂ are bent at right angles, and further, both ends b ₄ , b ₄ are bent inward, leaving a horizontal portion, and one Insert the tips b _{4 and} b ₄ of the support frame b 3 into the support part a ₃ formed by wrapping around the lower end of the back plate a, and insert the tips b ₄ and b ₄ of the other support frame b ₃ into the lower end of the back plate 1. It is inserted into the support portion 1b formed by rolling it up.

Therefore, when the supporting frames b ₃ and b ₃ are positioned on both outer surfaces of the elastic piece b ₁ which is a component of the elastic element b attached to the lower end of the back plate a and the back plate 1, the school bag A can be accommodated. The load of the object is transmitted from the support part 1b provided at the bottom of the back plate 1 to the support part _b2 of the bullet piece _b1 via the support frame _b3 , and the bullet piece _b1 exhibits elasticity and is attached to the school bag body A.
cushions the movement in the direction toward the backrest plate a.

Further, when the bullet piece _b1 is pulled downward, the elastic function is released and the gap between the back plate 1 and the back plate a becomes narrower, making it convenient to package and transport without adding bulk.

Therefore, the present invention has the following advantages.

Using the backrest plate that touches the back as a reference, the main body of the school bag is carried on the back at a pre-bounced angle using the pivot as a fulcrum, and the elastic element reduces the shock caused by bouncing at that angle, so the degree of bouncing is reduced. As the number of shots decreases, the shots become lighter, making them especially effective for lower grade children who lack physical strength.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
Fig. 2 is a rear view, Fig. 3 is a partially cutaway cross-sectional view taken along - line in Fig. 2, and Fig. 4 is an enlarged view of the main parts. FIG. In the diagram, A is the main body of the school bag, A ₁ is the back surface, and A ₂
is the fastening part, B is the backpack band, a is the back plate, and b is the elastic element.

Claims (1)

[Scope of Claim for Utility Model Registration] The upper end of the backrest band is fixedly fixed to the upper center of the back surface of the school bag body, and the upper end of the backrest plate is pivoted to the lower side of the fastening, and the lower end of this backrest band is fixedly fixed. The main body of the school bag can be held at a required inclination angle from the pivot support to the back support plate between the lower end of the back surface and the back support plate, and the school bag body can be swung in the direction approaching the back support plate using the pivot support as a fulcrum. A school bag that is equipped with an elastic element that can buffer movement. The backrest plate is formed into a curved shape with a concave center in the left-right direction.
The school bag mentioned in the section. The school bag according to claim 1, wherein the back plate is provided with a large number of ventilation holes.