JP5770916B1 - school bag - Google Patents

Abstract

A highly safe and low-cost school bag is provided. SOLUTION: Backpack belts 5 and 6 for carrying a school bag main body 2, a back ring 4 disposed on a back plate 3 of the school bag main body 2, and a pair of rockers disposed on the back ring 4 so as to be swingable. Arms 8 and 9. The pair of arms 8 and 9 includes an adhering portion 8j for adhering one end portion of the shoulder belts 5 and 6, and flat portions 8h and 9h in which opposed portions facing the back side of the user carrying the backpack body 2 are flattened, Respectively. [Selection] Figure 1

Description

  Embodiments described herein relate to a school bag.

  Generally, the school bag is provided with a back ring for attaching a shoulder belt to the upper center part of the back plate of the school bag body.

  Conventionally, this type of school bag has a pair of left and right mounting rings having annular insertion holes attached to the back ring, and one end of each of the pair of left and right shoulder belts is inserted into the insertion holes of the mounting ring and folded. A pair of left and right shoulder belts are attached to the back plate of the school bag main body by fixing the folded end portion by riveting or sewing (see Patent Documents 1, 2, and 3).

  The school bags described in Patent Documents 1 to 3 raise the upper portions of the pair of left and right shoulder belts upward so that the user, such as a child, can easily carry the pair of left and right shoulder belts. Various means are provided.

  For example, in the invention described in Patent Document 1, there is provided a belt locking portion that regulates the rotation angle of the attachment ring to which the pair of shoulder belts are attached and holds the attachment ring upward.

  Further, in the invention described in Patent Document 2, the rotation angle of the annular coupling body coupled to the backpack belt is regulated by a required angle so as to face upward, and an elastic body that holds the upward state is provided on the backpack belt. ing.

  Furthermore, in the invention described in Patent Document 3, there is provided a fixture or the like for holding a ring-shaped connecting ring connected to the shoulder belt in a state of facing upward.

Japanese Patent Laid-Open No. 2004-237072 JP 2004-81800 A Utility Model Registration No. 3118031

  However, in the inventions described in Patent Documents 1 to 3, since the connection part such as the connection ring and the attachment ring connected to the shoulder belt is an annular shape (ring shape) having an insertion hole, the annular part has a convex part. And the insertion hole forms a recess. For this reason, when the schoolchild who is the user carries the school bag, since the ring-shaped connecting ring and the uneven part of the mounting ring come into contact with the child's back, if the school bag swings up and down or laterally due to the child's walking etc. There is a problem that the child's back rubs and gives pain.

  In addition, since the connecting portions such as the connecting ring and the mounting ring are annular (ring-shaped), the child's hair is likely to enter the insertion hole of the connecting portion and get entangled. For this reason, there is also a problem that when a child is carrying a school bag, especially when it is lowered, the hair is pinched and painful.

  Furthermore, in the above conventional example, in order to keep the upper part of the shoulder belt in a state of rising upward, other members such as the belt locking portion, the elastic body, and the fixture are provided. This causes an increase in the number of points and the number of assembling steps, resulting in a decrease in assembling workability and an increase in cost.

  The problem to be solved by the present invention is to provide a safe and low cost school bag.

  The school bag of the embodiment includes a backpack belt for carrying the school bag body, a back ring disposed on the back plate of the school bag body, and a pair of arms disposed swingably on the back ring.

Each of the pair of arms includes an adhering portion for adhering one end portion of the shoulder belt and a flat portion in which a facing portion facing the back side of the user carrying the school bag body is formed flat.
The pair of arms is detachably arranged on the arm body so that the arm body made of a single plate swingably disposed on the back ring and one end of the shoulder belt can be held between the arm body. And an upper plate to be provided.
Further, the upper plate is disposed on the arm body so that the upper end thereof is higher than the upper end of the arm body .

According to the present invention, since the facing surface of the arm that faces and contacts the child's back is formed in a flat portion that is not a ring shape, it is as if it is configured in a ring shape such as a conventional connecting ring. Therefore, it is possible to solve the conventional problem that causes rubbing and pain and improve safety.
Furthermore, since the arm fixes one end portion of the shoulder belt at the fixing portion with, for example, a rivet, it is possible to improve both the fixing strength and the efficiency of the fixing operation.

The front view which shows the back surface of the school bag of embodiment. (A) is an enlarged front view of the back ring shown in FIG. 1, (b) is a side view showing a state in which the reinforcing plate of (a) is removed. (A) is a front view showing the internal structure of the main body (front cover) of the back ring shown in FIG. 1, and (b) is abbreviate | omitting illustration of the reinforcement board and suspension ring shown in FIG.2 (b). FIG. The front view of the backplate fastened to the reinforcement board shown in FIG. 1, FIG. 2 (a), (b). 2A is a front view of an upper plate shown in FIGS. 2A and 2B, FIG. 2B is a side view thereof, and FIG. (A) is a rear view of each arm main body shown in FIG. 1, FIG. 2 (a), (b) etc., (b) is a longitudinal cross-sectional view which shows attachment of the arm main body and an upper board. FIG. 4 is a front view showing a swinging action of a pair of left and right arms shown in FIG. (A)-(c) is a side view which shows the various modifications of the arm main body and upper board which concern on 2nd Embodiment. (A) is a front view of the back ring which concerns on 3rd Embodiment, (b) is a side view of the same (a). 9A is a front view showing the surface of the upper plate shown in FIGS. 9A and 9B, FIG. 9B is a rear view showing the back surface of the upper plate shown in FIG. 9A, and FIG. ) Side view, (d) is a longitudinal sectional view of (c). The front perspective view which shows the state which stood up the upper part of the backpack belt which concerns on 3rd Embodiment upwards in the figure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in several drawing.

(First embodiment)
FIG. 1 is a front view showing the back surface of the school bag according to the first embodiment, FIG. 2A is an enlarged front view of the back ring shown in FIG. 1, and FIG. 1B is a state in which the reinforcing plate of FIG. FIG.

  As shown in FIG. 1, the backpack 4 is arrange | positioned on the center part of the upper part of the backplate 3 of the closed-bottomed square tube-shaped school bag main body 2 made of leather or synthetic resin. The back ring 4 is for attaching one end portion (upper end portion in FIG. 1) of a pair of left and right shoulder belts 5 and 6, a main body case 7 made of a synthetic resin having a substantially oblong front shape, and the main body case. 7 is a pair of left and right arms 8 and 9 made of synthetic resin that are swingably movable in the left and right directions, and a metal that is disposed behind these arms 8 and 9 at an intermediate portion between them. The suspension ring 10 is provided. The suspension ring 10 is suspended by being hooked on, for example, a hook (not shown) that suspends the school bag 1.

  As shown in FIG. 3 (a), the main body case 7 of the back ring 4 is fixed to the upper end portion of the back ring 3 at the upper end surface in the drawing and the upper central portion of the back plate 3 of the backpack body 2 at the upper end surface. A base 7b made of a synthetic resin having a flat bottomed cylindrical shape, a front opening 7c in which the front of the base 7b on the front side in FIG. 3 is opened, and FIG. 2 (a) closing the front opening 7c. It has a front cover 7d, which is a main body cover made of synthetic resin.

  The base 7b is provided with substantially U-shaped inner fitting walls 7e that protrude slightly toward the front (front) side in FIG. 3 (a) on both the left and right side surfaces and the bottom of the opening edge of the front opening 7c. It is integrally formed.

  On the other hand, as shown in FIG. 3B, the front cover 7d is integrally formed with an outer fitting wall 7f that is detachably fitted to the outer periphery of the inner fitting wall 7e of the base 7b at the outer peripheral edge thereof. Yes.

  As shown in FIG. 2 (a), an arc plate-like reinforcing plate 11 is screwed to the upper surface of the front cover 7d with, for example, three set screws 12, 12, 12 to reinforce the strength of the main body case 7. I am trying. The reinforcing plate 11 embeds a plurality of metal bars 11b, 11b in the form of a metal strip such as an aluminum plate in a reinforcing plate body 11a made of a synthetic resin in order to reinforce the strength of the reinforcing plate body 11a itself. The reinforcing plate 11 is attached to the front cover 7d by a plurality of set screws 12, 12,... Via a back plate 13 shown in FIG.

  As shown in FIG. 3A, the pair of left and right arms 8 and 9 have arm main bodies 8a and 9a respectively formed of a single plate having a predetermined thickness made of synthetic resin.

  Each arm main body 8a, 9a has an arm inner end 8b, 9b extending substantially vertically from the upper opening 7a of the main body case 7 to the inside thereof, and an arm outer end extending from the upper opening 7a to the outside of the main body case 7. The portions 8c and 9c are integrally coupled with a synthetic resin.

  As shown in FIG. 3 (b), the inner end portions 8b and 9b of each arm are formed in a straight shape so as to rise substantially vertically, and the outer end portions 8c and 9c of the arms are formed when the child carries the school bag body 2. It leans forward at the required angle so as to approach the back side of the child.

  The inner end portions 8b and 9b of the arms are provided with insertion holes 14a and 15a through which the support shafts 14 and 15 that support the pair of left and right arm bodies 8a and 9a so as to be swingable to the left and right, respectively.

  As shown in FIG. 3B, the support shafts 14 and 15 project from the inner surface of the base 7b substantially vertically to the front cover 7d side, and pass through the insertion holes 14a and 15a of the arm bodies 8a and 9a. A cylindrical base mounting boss 7g, a cover mounting boss 7h that protrudes substantially perpendicularly from the inner surface of the front cover 7d to the base 7b and fits into the insertion hole of the cylindrical base mounting boss 7g, and these mounting bosses 7g, 7h, and a set screw (not shown) that is screwed in a connected state.

  That is, after these base mounting bosses 7g are inserted into the insertion holes of the cover mounting bosses 7h and connected, the mounting screws (not shown) are respectively screwed from the screw holes on the back surface of the base mounting bosses 7g, whereby the base mounting bosses 7g. And the cover mounting boss 7h are fixed to form the support shafts 14 and 15, and the base 7b and the front cover 7d are fastened.

  Each arm inner end portion 8b, 9b is integrally formed with a substantially triangular stopper projection 8d, 8e, 9d, 9e projecting outward from the left and right end portions, respectively. Yes.

  These protrusions 8d, 8e, 9d, and 9e for the stoppers are in contact with two sets of left and right stoppers 16a and 16b and 16c and 16d disposed in the main body case 7, respectively. Are respectively controlled to a predetermined angle.

  These stoppers 16a, 16b, 16c, and 16d are protrusions that are integrally projected on the inner surface of the base 7b of the main body case 7 at a required interval on both the left and right sides of the pair of left and right arms 8 and 9. Rib).

  Each arm inner end portion 8b, 9b is integrally provided with a substantially inverted triangular locking projection 8f, 9f projecting downward in the drawing at the lower end in the drawing.

  The pair of left and right engaging projections 8f and 9f are in contact with the outer end surfaces of rectangular cylindrical sliding terminals 17a and 18a provided at one ends of the pair of left and right compression coil springs 17 and 18, respectively. These compression coil springs 17 and 18 always elastically press the locking projections 8f and 9f outward in the left-right direction in the drawing, and urge the pair of left and right arm outer ends 8c and 9c to approach each other. To do.

  Each sliding terminal 17a, 18a is formed in a square tube shape from a synthetic resin, and is slidably disposed at the left end and the right end of the compression coil springs 17, 18 in the drawing. The pair of left and right compression coil springs 17 and 18 are housed in a recess formed on the inner surface of the base 7b, and one end (the right end and the left end in the figure) is fixed.

  As shown in FIGS. 3A and 3B, the arms 8 and 9 have the surfaces of the arm outer ends 8c and 9c of the arm bodies 8a and 9a, that is, the facing surfaces facing the back side of the child. Flat portions 8h and 9h are formed by flat formation.

  These flat portions 8h and 9h form notches 8i and 9i in the lower part of the figure 3 while the upper parts thereof are riveted to the upper ends of the pair of left and right shoulder belts 5 and 6 shown in FIG. Are formed on the fixing portions 8j and 9j.

  The fixed portions 8j, 9j form a plurality of rivet insertion holes 19a, 19a,... Such as counterbore holes through which the rivets 19 are inserted.

  As shown in FIG. 3 (b), each arm 8, 9 has an upper plate 20 having a substantially L-shaped side surface attached to the back side of the arm outer end portions 8c, 9c.

  As shown in FIGS. 5A, 5B, and 5C, the upper plate 20 includes an upper plate body 20a that is substantially the same shape and size as the upper ends of the arm outer end portions 8c and 9c, and the upper plate body. And a U-shaped flange 20b integrally projecting at the lower end of the back surface of 20a.

  Each upper plate body 20a has counterbore-like back side rivet insertion holes 20c, 20c communicating with the rivet insertion holes 19a, 19a of the arm outer end portions 8c, 9c, respectively.

  As shown in FIG. 5C, the flange 20b has a recess 20d for fitting at the lower end thereof. As shown in FIGS. 6 (a) and 6 (b), the concave portion 20d is fitted and attached to a convex portion 21 that protrudes integrally with the back surface (back surface) of each arm outer end portion 8c, 9c.

  In this way, the upper plate 20 is attached to each arm body 8a, 9a, and one end of a pair of left and right shoulder belts 5, 6 is placed in each gap g formed between the upper plate 20 and each arm body 8a, 9a. Are inserted into the rivet insertion holes 19a and 19a and the rear rivet insertion holes 20c and 20c, and the rivets are fastened to secure the back belts 5 and 6 to the arm bodies 8a and 9a. The upper plates 20 are fixed to the arm bodies 8a and 9a.

  As shown in FIG. 7, the pair of left and right arms 8 and 9 configured in this manner individually swing in the left and right directions according to the pulling direction of the pair of left and right shoulder belts 5 and 6. For this reason, since the left and right arms 8 and 9 swing individually according to the movement of the backpack belts 5 and 6 when the child carries the left and right backpack belts 5 and 6, the backpack is easily carried.

  In addition, since the opposing surfaces of the left and right arms 8 and 9 facing and touching the back of the child are formed in flat portions 8h and 9h that are not ring-shaped, they are configured in a ring shape such as a conventional connecting ring. Therefore, it is possible to solve the conventional problem of rubbing and giving pain and improving safety.

  Further, the pair of left and right arms 8 and 9 fix one end of the pair of left and right shoulder belts 5 and 6 with the rivets 19 at the fixing portions 8j and 9j, thereby improving both the fixing strength and the efficiency of the fixing operation. Can be planned.

  In other words, when one end of the back belts 5 and 6 is connected to a ring such as a conventional connecting ring, the end portions of the back belts 5 and 6 are inserted into the insertion holes of the rings, and then turned back. A step of fixing the portion by riveting is necessary.

  On the other hand, according to the present embodiment, one end portions of the shoulder belts 5 and 6 are inserted into the opening gap g between the arm bodies 8a and 9a and the upper plate 20, and the rivet insertion holes 19a and 19a and the back side rivet insertion holes are inserted. The rivets 19 can be fixed easily and quickly by riveting such as inserting and crimping the rivets 19 into the 20c and 20c. That is, it is possible to omit the step of inserting and folding the one end portions of the shoulder belts 5 and 6 into the insertion holes of the ring.

  In addition, according to the present embodiment, the entire arm main body 8a, 9a is thickened and integrally molded with resin, so that the residual stress at the time of the resin molding can be reduced and the strength can be improved. it can.

  Further, since the swinging of the pair of left and right arms 8 and 9 is elastically controlled by the axial compression and extension action of the compression coil springs 17 and 18, conventional V-shaped leaf springs and torsion coil springs are used. Breakage such as spring breakage can be reduced as compared with the case of using.

  In addition, according to the present embodiment, the pair of left and right arms 8 and 9 are individually elastically supported by the pair of left and right compression coil springs 17 and 18, respectively. Can be made. For this reason, it becomes easy to carry the shoulder belts 5 and 6.

  Since each arm main body 8a, 9a and the upper plate 20 are attached by fitting the convex portion 21 and the concave portion 20d provided thereto, the workability of the mounting operation between the arm main body 8a, 9a and the upper plate 20 is improved. The mounting accuracy can be improved.

  According to the present embodiment, the metal parts are limited to the metal rings 11b, 11b,..., The compression coil springs 17, 18, the set screw 12, and the rivet 19 of the suspension ring 10 and the reinforcing plate 11, and the rest are synthesized. Since it is made of resin, the entire back ring 4 can be reduced in weight.

(Second Embodiment)
FIGS. 8A to 8C show modifications of the upper plate 20 according to the second embodiment of the present invention. This embodiment is characterized in that the thickness of the flange 20b of the upper plate 20 according to the first embodiment is variously changed according to the thickness of the shoulder belts 5 and 6.

  That is, when the thickness of the shoulder belts 5 and 6 is thin, the thickness of the flange 20b of the upper plate 20 is decreased, and the thickness of the flange 20b is increased as the thickness of the shoulder belts 5 and 6 is increased. .

  That is, according to this embodiment, it is only necessary to change the upper plate 20 in which the thickness of the flange 20b is different according to the thickness of the shoulder belts 5 and 6, and it is not necessary to change the arms 8 and 9 as a whole. For this reason, the freedom degree of the thickness of the shoulder belts 5 and 6 is high, and the cost can be reduced.

(Third embodiment)
Fig.9 (a) shows the external appearance front view of the back ring 4 which concerns on the 3rd Embodiment of this invention, (b) has shown the same and side view.

  In this embodiment, as shown in FIG. 11, the upper plate 20 according to the first embodiment is replaced with a tall upper plate 30 in order to raise the upper part of the pair of left and right shoulder belts 5 and 6 upward in the drawing. It has the main features in the points.

  The tall upper plate 30 is higher than the height of the pair of left and right arm bodies 8a, 9a and rises upward in the figure.

  As shown in FIGS. 10A to 10D, the tall upper plate 30 has a tall upper plate main body 30a that is a predetermined amount higher than the height of the pair of left and right arm main bodies 8a and 9a, and a lower end of the back surface of the main body 30a. A U-shaped flange 30b formed integrally, a fitting recess 30c formed in the flange 30b, and three back-side rivet insertion holes 30d, 30e, 30f are provided.

  In other words, the lower left and right lower back rivet insertion holes 30d and 30e in the lower part of the figure are inserted into the rivets 19 inserted into the rivet insertion holes 19a and 19a of the pair of left and right arm bodies 8a and 9a, and are riveted. Thus, the belts 5 and 6 are fixed to the backpack.

  On the other hand, the upper back side rivet insertion hole 30f in the upper part of the drawing is fixed to one end portion of the backpack belts 5 and 6 by the rivet 19 being inserted through the one end portions of the backpack belts 5 and 6 and riveted. .

  The tall upper plate 30 is attached to the arm main bodies 8a and 9a by fitting the convex portions 21 of the arm main bodies 8a and 9a into the fitting concave portions 30c on the back surface thereof.

  According to this embodiment, the upper portions of the pair of left and right shoulder belts 5 and 6 can be raised above the upper ends of the pair of left and right arm bodies 8a and 9a by the pair of left and right tall upper plates 30 and 30. it can. For this reason, it is possible to further improve the ease of carrying a child when the child carries the pair of left and right carrying belts 5 and 6.

  According to this embodiment, the upper portions of the belts 5 and 6 can be raised upward easily and quickly by simply replacing only the upper plate 20 having a normal height with the tall upper plate 30. .

  For this reason, it is possible to reduce the number of parts and the number of assembling steps as compared with the conventional example in which various parts are used for raising the belts 5 and 6 upward to the upper part. As a result, cost reduction can be achieved.

  Further, by preparing in advance a plurality of tall upper plates 30 with various heights, the rising heights of the shoulder belts 5 and 6 can be easily and quickly adjusted.

  The number of the rivet insertion holes 19a, 19a,... And the back side rivet insertion holes 20c, 30d to 30f may be reduced or increased as appropriate. In this case, the number of metal rivets 19 should be reduced. Therefore, the weight of the entire back ring 4 can be reduced, and the cost can be reduced by reducing the number of parts.

  Moreover, the suspension ring 10 may be configured to be tiltable backward (in the direction of the back surface of the drawings such as FIG. 2A and FIG. 3A), and may be configured to be movable up and down.

  While various embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the present invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the present invention. These embodiments and modifications thereof are included in the scope and gist of the present invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... School bag, 2 ... School bag main body, 3 ... Back plate, 4 ... Back ring, 5, 6 ... Left-right paired shoulder belt, 8, 9 ... Left-right paired arm, 8a, 9a ... Left-right paired arm main body, 8h, 9h: Flat portion, 8j, 9j: Adhering portion, 17, 18 ... A pair of left and right compression coil springs, 20 ... Upper plate, 30 ... Tall upper plate.

Claims (3)

A school bag having a shoulder belt for carrying the school bag body, a back ring disposed on the back plate of the school bag body, and a pair of arms disposed swingably on the back ring,
Each of the pair of arms includes a fixing portion that fixes one end portion of the shoulder belt, and a flat portion that is formed with a flat facing portion facing the back side of the user carrying the school bag body,
The pair of arms are detachably disposed on the arm body so that the arm body is formed of a single plate swingably disposed on the back ring and one end of the shoulder belt can be held between the arm body. An upper plate provided,
The school bag , wherein the upper plate is disposed on the arm body so that an upper end thereof is higher than an upper end of the arm body . The school bag according to claim 1, wherein the back ring includes a compression coil spring that urges the pair of arms to swing in a direction in which the pair of arms approach each other. The school bag according to claim 1 or 2, wherein each of the pair of arms is configured to be individually swingable.

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