JPH0122512Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a back ring used for attaching a backpack belt to a school bag.

[Conventional technology]

Conventionally, a back ring for a school bag in which the left and right backpack bands are both freely rotatable around the axis of the attachment piece of the band attachment ring has been known from Publication of Utility Model Publication No. 11170/1983. There is.

(Problem to be solved by the invention) Since the above-mentioned type does not have a return spring that pulls the attachment pieces together toward the center of the school bag, a slim child may carry the school bag on his back and shake it carelessly. If the bag rusts, the attachment piece may rotate outward excessively, causing the backpack band to become loose, which may cause the backpack to become extremely unstable.

(Means for Solving the Problems) The present invention provides a pair of left and right receiving holes in which a diagonally upward hole that opens diagonally upward and a straight upward hole that opens directly upward have a mutually continuous shape. A pair of left and right mounting plates provided on the edges of both shoulders and a pair of left and right inserts inserted into the left and right receiving holes, with the lower end rotatably supported and the upper end protruding, swinging between diagonally upward and directly upward. auxiliary members, and a return spring that is installed in the mounting board and pulls these auxiliary members straight upward;
It is an object of the present invention to solve the above-mentioned problems by providing a back ring for a school bag, which is characterized by having a connecting ring for a backpack belt attached to the upper end of each of these auxiliary members.

(Operations and Effects of the Invention) As described above, the present invention is equipped with a return spring inside the mounting board for pulling back straight upward the auxiliary member that fastens the backpack belt through the connecting ring. Even if a slender child carries a school bag on his back and shakes it, the auxiliary member is prevented from rotating outward excessively by the action of the return spring. This has the effect of reliably preventing the strap from becoming loose and the backpack being carried on the back becoming unstable.

〔Example〕

In the embodiment shown in the figure, a thin plate-shaped mounting plate main body 1 and a back cover 2 that closes the opening of the mounting plate main body 1 are made of hard plastic.
Fan-shaped surrounding frames 3, 3' are placed in the left and right sides of the frame, parallel surrounding frames 4 are provided in the center, and bosses 6 are provided at the lower parts of the fan-shaped surrounding frames 3, 3' and the upper parts of the parallel surrounding frames 4. In addition to providing mounting holes 7, 7', and 8 with the following functions, the back cover 2 is fitted to the mounting board body 1, and the top end of the boss 6 is opened in the back cover 2, thereby providing a head exit hole that also serves as a positioning function. A mounting board 10 is constructed by projecting the space outward through 9, and within this mounting board 10, the space formed by the fan-shaped surrounding frames 3, 3' and the space formed by the parallel surrounding frame 4 are provided. A pair of left and right receiving holes 1 in which a diagonally upward hole 11 that opens diagonally upward by opening the upper side wall and a straight upward hole 12 that opens directly upward are continuous with each other.
3, 13' and a hollow box-shaped part 14 for attaching a suspension ring to be described later, and separately from the mounting plate 10, a strip-shaped elastic metal piece is folded in two and the bent part is used as a pipe part 15. A pair of left and right auxiliary members 18, 18' with shaft holes 17 formed at the lower ends of the insertion legs 16 on both sides.
The insertion legs 16 of each auxiliary member 18, 18'
Each auxiliary member 18, 18' is received by inserting it into the receiving hole 13, 13' and rotatably fitting the shaft hole 17 into the boss 6 in the fan-shaped surrounding frame 3, 3'. The neck can be freely vibrated in the direction parallel to the mounting plate 10 in the holes 13, 13', and these auxiliary members 18, 1
The back side part 20 of the C-shaped connecting rings 19, 19' is rotatably inserted into the tube part 15 of the tube 8', and the core tube 22,
By loosely fitting both ends of the connecting rings 19, 19', the core tubes 22, 22' are connected to both ends 2 of the connecting rings 19, 19'.
A leg is rotatably provided between the core tubes 22 and 21', and the upper end of the backpack belt toy, A' is connected to each of the core tubes 22 and 22'. A hanging member 27 constituted by a hanging ring 26 provided at the upper end of the leg portion 25 and a hanging ring 26 that can be raised and lowered.
The legs 25 of this hanging member 27 are inserted into the hollow box-shaped part 14 from above, and the elongated hole 24 is slidably fitted into the boss 6 therein. The member 27 is made to be expandable and retractable upward, and the mounting board 10
A return spring 28 for returning the auxiliary members 18, 18' directly upward is installed inside.

[Brief explanation of the drawing]

The figures show an embodiment of the back ring for school bags according to the present invention, in which Fig. 1 is a perspective view showing the whole, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view showing the back ring of the present invention. 4 is a sectional view taken along the line C-C in FIG. 1, and FIG. 5 is a sectional view taken along the line D-D in FIG.
FIG. 6 is a sectional view taken along line E-E. 1... Mounting board body, 2... Back cover, 3, 3'...
Fan-shaped surrounding frame, 4...Parallel surrounding frame, 6...Boss, 7,
7', 8...Mounting hole, 9...Head exit hole, 10...Mounting plate, 11...Diagonally upward hole, 12...Directly upward hole, 13, 13'...Receiving hole, 14...Hollow box Shabu,
15... pipe section, 16... insertion leg, 17... shaft hole,
18, 18'... Auxiliary member, 19, 19'... Connection ring, 20... Back side part, 21, 21'... Both ends,
22, 22'...core tube, a, i'...back belt,
24...long hole, 25...leg, 26...suspension ring,
27... Hanging member, 28... Return spring.

Claims (1)

[Scope of utility model registration request] A mounting plate is provided with a pair of left and right receiving holes on the edge surfaces of both left and right shoulders, each having a shape in which a diagonally upward hole that opens diagonally upward and a straightly upward hole that opens directly upward are continuous; A pair of left and right auxiliary members are inserted into each receiving hole, the lower end is rotatably supported, and the upper end is in a protruding state, swinging from diagonally upward to directly upward. A back ring for a school bag, comprising a return spring that pulls the member straight upward, and a connecting ring for a backpack belt attached to the upper end of each of these auxiliary members.