JPH01154823U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the back ring attachment for school bags according to the present invention, Fig. 2 is a rear view with the back cover removed, Fig. 3 is an enlarged sectional view taken along the line A-A, 4
The figure is an enlarged front view of the back ring connecting slider used in the present invention, Figure 5 is a back view of the conventional example with the back cover removed, Figure 6 is a sectional view taken along line B-B, and Figure 7. FIG. 2 is an enlarged partially sectional front view of a conventional back ring connecting slider. 4 - Back ring, 5 - Coil spring, 10 - Fixture body, 11 - Surface plate, 12 - Window hole, 13a,
13b, 13c - locking protrusion, 14a - guide wall,
20 - Back ring connecting slider, 21 - Base part, 22
~Protrusion, 22a~Insertion hole, 23~Latching recess, 2
4~Spring storage recess, 30~Back cover, 31~Guide groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A long window hole 12 is bored in the left-right direction in the surface plate portion 11 of the box-shaped synthetic resin fixture body 10 that is fixed to the outer surface of the back plate of the school bag. A plurality of locking protrusions 13a, 13b, 13c, . On the back surface of the surface plate portion 11, there are guide walls 14a parallel to both the upper and lower sides of the window hole 12 at positions a predetermined distance away from both the upper and lower sides of the window hole 12, respectively.
14a is disposed within the fixture main body 10, and the guide wall 14 has a vertical dimension larger than the vertical dimension of the window hole 12.
The left and right dimensions are the dimensions that fit into the locking protrusions 13a, 13b with some gap between them.
13c... has a base part 21 of a size that can be fitted between one engagement protrusion and another adjacent engagement protrusion, and the base part 21 has a base part 21 with a size that can be fitted between the two adjacent engagement protrusions, and the left and right center of the upper and lower sides of the base part 21. The portion includes the engagement protrusion 13a,
A locking recess 2 that engages one of 13b, 13c...
3 and 23, and further, a protrusion 22 that can protrude through the window hole 12 is provided from the base part 21, and a back for connecting the upper end of the backpack belt of the school bag is provided on the protrusion 22. Insertion hole 22a of ring 4
A pair of back ring connecting sliders 20 made of synthetic resin are housed with their protruding parts 22 protruding through the window holes 12, and a spring storage recess 24 is provided in the center of the back surface of both back ring connecting sliders 20. The upper part of the coil spring 5 whose diameter gradually increases toward the lower end is fitted into the spring storage recess 24, and the lower end of the coil spring 5 is made of a metal plate and is in pressure contact with the fixture main body 10. back cover 30
A low bending guide groove 31 for slidingly guiding the lower end of the coil spring 5 is disposed on the back cover 30, facing in the left-right direction, and the engaging protrusions 13a, 13b, 13c
. . . When the entire back surface of the base portion 21 of the back ring connecting slider 20 comes into contact with the back cover 30, the locking recess 23
, 23, and the back ring connecting slider 20
A back ring for a school bag that has a height that prevents it from slipping out of the locking recesses 23, 23 when the back ring is tilted to the maximum in the left-right direction between the back surface of the front plate part 11 of the attachment main body 10 and the back cover 30. Mounting hardware.