JP2021154051A - Backpack - Google Patents

Abstract

To constitute a backpack so that, in a fitted state, the entire back pad part of the backpack body is made to easily come into contact with a user's back and a suitable wearing with an enhanced fitness can be secured, while easy fitting/removing of a shoulder belt is secured when the user shoulders the backpack body on the back and removes it from the back.SOLUTION: A backpack includes: a backpack body having on the front side a back pad that comes in contact with and supports a user's back; a pair of left and right shoulder belts which are fitted to user's left and right shoulders to shoulder the backpack body, upper ends of which are supported at the upper end of the back pad, and lower ends of which are supported at the lower part of the backpack body; a pair of left and right connection rings that connect the lower end of the pair of shoulder belts to the lower part of the backpack body respectively; and an adjustment member that is provided in the lower part of the backpack body. The adjustment member is provided with an energizing force which makes the pair of connection rings to come close to each other and displaces them in the direction toward the rear side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a backpack carried on the back of a user, such as a school cell or a rucksack.

There are various shapes and structures of backpacks such as land cells and rucksacks, but most of them have a backrest that is supported in contact with the back of the user and are carried on the back of the user. The backpack body is provided with a storage part inside, and the backpack body is hung around the left and right shoulders of the user so that the backpack body can be carried on the back. It is provided with a pair of left and right backpack belts in which the upper end portion is supported and the lower end portion side is supported below the backrest portion of the backpack body.

The upper end of each pair of left and right backrest belts is connected to a connecting body provided on the upper side of the backrest of the backrest body, while the upper end thereof is supported on the lower side of the backrest of the backrest body. The lower end side to be formed is connected so that its length can be adjusted.

As shown in Patent Document 1 and Patent Document 2, the back belt includes an upper belt formed by connecting the upper end portion to a connecting body provided on the upper side of the back support portion of the backrest main body, and a back belt. It is supported on the lower side of the back support part of the case body, and is composed of a lower belt extending from the lower side, and the lower end of the upper belt and the upper end of the lower belt correspond to the size of the shoulder part to be hung, and the joint position thereof. There are some that can be connected to each other with variable length and adjustable length. The backpack belt having such a configuration has a buckle shape that allows the lower end of the upper belt and the upper end of the lower belt to be connected to either the lower end of the upper belt or the upper end of the lower belt by inserting the end portion of another belt. A connecting ring is supported, and a plurality of fastening holes are formed at the end of the other belt with respect to the belt on which the connecting ring is supported at predetermined intervals in the length direction thereof, and the other belt is inserted into the connecting ring. The fastening needle supported by the connecting ring is fastened to the fastening hole at an arbitrary length position. As a result, the fastening and coupling positions of the ends of the other belts inserted into the connecting ring with respect to the connecting ring are made variable, and the upper and lower belts can be connected to each other in an adjustable length.

Utility Model Registration No. 3133399 Japanese Unexamined Patent Publication No. 2008-54940

When the overall length of the backrest belt is increased in the backrest, a force in the direction in which the upper position of the backrest portion is separated from the person's back is likely to act. This phenomenon is likely to occur remarkably when a high-load object is stored in the storage portion of the back portion main body, or when a heavy object is stored toward the bottom of the storage portion. For this reason, it is preferable to set the overall length of the backrest belt as short as possible so that the entire backrest portion of the backrest main body is in close contact with the user's back.

The conventional backpack belt used in the land cell described in each of the above Patent Documents 1 and the backpack bag described in Patent Document 2 is a backpack belt by adjusting the fastening joint position between the lower end of the upper belt and the upper end of the lower belt. It is possible to variably adjust the overall length of the backpack belt with respect to the main body of the bag, but once the backpack is carried on the back, the connecting position of the upper belt and the lower belt is changed to adjust the length. That was difficult. For this reason, when carrying the backrest body on the back, if the backpack belt is set to be long in order to facilitate the operation of turning the backpack belt on the shoulder of the user, the length cannot be adjusted after carrying the backrest. Therefore, there is a problem that it becomes difficult to secure the adhesion to the back of the user.

The present invention has been made by paying attention to such a conventional defect, and in the backpack of a school cell, a rucksack, etc., the user carries the backpack body on the back or the user separates from the back. While ensuring the operability of attaching and detaching the backpack belt when making it, when it is attached, the entire backrest of the backpack body makes it easier for the user to come into contact with the back, and the degree of adhesion is improved. The purpose is to configure it so that the state can be secured.

In order to solve the above problems, the backrest of the present invention is provided on the front side of the backrest body having a backrest portion that is supported in contact with the back of the user, and on the left and right shoulders of the user. A pair of left and right backpack belts that are hung around to carry the backrest body, the upper end of which is supported by the upper part of the backrest, and the lower end side is supported by the lower part of the backrest body, and a pair. It is provided with a pair of left and right connecting rings for joining the lower end of the backrest belt to the lower part of the back body, and an adjusting member provided at the lower part of the back body, and the adjusting member is a pair of connecting rings. Is characterized by having an urging force that approaches each other and displaces them in the direction toward the rear side.

In the back of the present invention, it is preferable that the adjusting member is a single tension spring, and a pair of connecting rings are joined to both ends thereof.

In the back of the present invention, the pair of connecting rings are displaced along a pair of guide holes provided so as to extend along a predetermined direction, and the direction of connecting the pair of connecting rings and the above-mentioned predetermined direction The angle formed by the invention is preferably set in the range of 120 degrees to 150 degrees.

In the backrest of the present invention, the adjusting member includes a first tension spring and a second tension spring that are independent of each other, and the pair of connecting rings is a first connecting ring corresponding to one of the pair of backpack belts. The pair of backpack belts are provided with a second connecting ring corresponding to the other, and the first tension spring has one end fixed to the lower part of the back body and the other end to the first connecting ring. The second tension spring is preferably joined so that one end is fixed to the lower part of the dorsal body and the other end is joined to the second connecting ring.

In the back of the present invention, the back plate can be opened and closed, and the lid plate extending from the lower end and the tension band are fixed to the lower part of the back body, and the back. It is preferable to provide a buckle that can be selectively selected from the state that can be separated from the lower part of the case body.

In the dorsal part of the present invention, the tail lock has a female part on one of the tip of the tension band and the lower part of the dorsal part main body, and a male part on the other side. An operating member is provided so as to be movable relative to the female part, and the male part is provided with a protrusion that protrudes vertically outward from the surface on which the female part is fixed, and the side surface of the protrusion has a protrusion that protrudes outward. One engaging portion is provided, the female portion is arranged in order along the direction in which the tension band extends, and has a plurality of engaging holes into which protrusions can be inserted selectively, and the male portion and the female portion are provided. Of these, the first magnet is provided on the side where the operating member is not provided, and the operating member has a plurality of openings and a plurality of second magnets arranged at positions corresponding to each of the plurality of engaging holes. And a second engaging portion that protrudes inward from the inner surface of the opening, and when the male protrusion is selectively inserted into any of the plurality of engaging holes, the first magnet and Due to the magnetic attraction between the second magnets, the first engaging part and the second engaging part are engaged with each other so that the male part and the female part are fixed to each other, and the male part and the female part are fixed to each other. By sliding the operating member along a predetermined direction from this state, the position of the second magnet with respect to the first magnet is shifted, and the engagement between the first engaging portion and the second engaging portion is released. , It is preferable to release the fixed state of the female part and the male part.

In the back of the present invention, the operating member is provided on the female portion, and the first magnet is provided on the male portion, which is the surface on which the female portion is fixed and is provided around the protrusion, and the male portion is a bag. The female part is provided on the front surface of the main body of the male part, the female part is provided on the lid plate, the first magnets are arranged one by one on the surface of the male part with the protrusions sandwiched in a predetermined direction, and the female part is provided in a predetermined direction. It has two engaging holes arranged along the
Two engaging holes and two openings are provided at intervals corresponding to the intervals between the two first magnets, and three second magnets are arranged with the engaging holes in between in a predetermined direction. Is preferable.

In the back of the present invention, on the surface of the male portion, two third magnets having a polarity opposite to that of the first magnet are arranged so as to be adjacent to each of the two first magnets. When the operating member is slid along a predetermined direction from the state where the female portion and the female portion are fixed to each other, the magnetic attraction between the first magnet and the second magnet is released, and the third magnet and the third magnet are released. It is preferable that magnetic repulsion occurs between the second magnets.

In the backrest of the present invention, the tail lock has a positioning member attached to the lower part of the backpack body, a first member attached so as to be relatively movable along the direction in which the tension band extends with respect to the positioning member, and a first member. It is provided with a second member provided at the tip of the tension band so that it can be attached to and detached from one member. On one side of the female part, an operating member is provided so as to be movable relative to the male part and the female part. , It has an engaging hole into which a protrusion can be inserted, and a first magnet is provided on the male part and the female part, whichever is not provided with an operating member.
The operating member includes an opening and a second magnet, and when the protrusion of the male portion is inserted into the engaging hole portion, the male portion and the female portion are subjected to magnetic attraction between the first magnet and the second magnet. By shifting the position of the second magnet with respect to the first magnet by sliding the operating member along a predetermined direction from the state where the parts are fixed to each other and the male part and the female part are fixed to each other. By releasing the fixed state of the female part and the male part and engaging the engaging part of the first member with the engaged part of the positioning member, the first member can move relative to each other along the direction in which the tension band extends. The positioning member is attached to the positioning member in such a state, and the positioning member is provided with a plurality of positioning recesses provided in the direction in which the tension band extends in the engaged portion, and the engaging portion of the first member engages with the positioning recess. , It is preferable that the relative movement of the first member is regulated.

In the back of the present invention, the engaged portion is a recess provided so as to extend along the direction in which the tension band extends, and is outside the side surface of the first member that extends in the direction in which the tension band extends. It is preferable that the engaging portion is formed so as to extend from the side surface of the first member toward the outer engaged portion side.

In the back of the present invention, the first member includes an elastic member for urging the engaging portion outward, and the positioning recess is in the engaged portion in the direction in which the engaging portion is urged by the elastic member. It is preferably a recess that is recessed deeper along the line.

In the back of the present invention, the engaged portion is provided so as to penetrate the wall portion of the positioning member along the urging direction by the elastic member, and the engaging portion of the first member penetrates the wall portion. It is arranged, and a pressing portion is provided at the tip thereof, and the pressing portion is operated so that the elastic member is contracted along the urging direction against the elastic force of the elastic member. It is preferable to disengage.

According to the present invention, while ensuring the operability of attaching and detaching the backpack belt when the user carries the backpack body on the back or when the user separates the backpack from the back of a school cell, rucksack, or the like. In the worn state, the entire back support portion of the backpack body can easily come into contact with the back of the user, and a good wearing state with an increased degree of adhesion can be ensured.

It is an overall perspective view of the school bag which concerns on 1st Embodiment of this invention. It is a side view which shows the state which the user carried the school bag shown in FIG. 1 on the back. It is a perspective view which shows the state which the lid plate of the school bag shown in FIG. 1 is opened. It is an enlarged view of the part A of FIG. It is a top view of the fixing plate in which a pair of adjusting members, a pair of connecting rings, and a male part of a buckle are arranged in the first embodiment. In the first embodiment, the back surface cover of the fixing plate is removed, and the bottom view shows the arrangement of the springs. FIG. 5 is a cross-sectional view taken along the line VII-VII'of FIG. It is sectional drawing which shows the structure of the fixing plate in the modification. It is a perspective view which shows the structure of the male part and the female part of the buckle in 1st Embodiment. It is a perspective view which shows the structure of the male part and the disassembled female part in 1st Embodiment. (A) shows the state before the male part and the female part are engaged in the first embodiment, (b) shows the fixed state in which the male part and the female part are engaged, and (c) shows the male part and the male part. It is a cross-sectional view which shows the state after sliding the operation member for disengagement of a female part, and (d) shows the state after disengagement of a male part and a female part. (A) shows the state before the male part and the female part are engaged in the first embodiment, (b) shows the state where the female part is placed on the male part, and (c) shows the state of (b). The fixed state in which the female part is pushed into the male part from the state and the female part and the male part are engaged with each other is shown, and (d) is after sliding the operating member to disengage the male part and the female part. A state is shown, and (e) is a cross-sectional view showing a state after the male part and the female part are disengaged. It is an overall perspective view of the school bag which concerns on 2nd Embodiment of this invention. It is a top view of the fixing plate in which a pair of adjusting members, a pair of connecting rings, and a buckle are arranged in the second embodiment. (A) is a cross-sectional view taken along the line XVA-XVA'of FIG. 14 (a), and (b) is a cross-sectional view taken along the line XVB-XVB'of FIG. 14 (b). It is a perspective view which shows the female part, the male part, and the positioning member which make up the buckle in 2nd Embodiment by disassembling.

Hereinafter, the back cover according to the embodiment of the present invention will be described with reference to the drawings. In the following description, examples applied to the school cell will be given, but the application is not limited to the school cell, and for example, a rucksack and other backpacks are also targeted.
<First Embodiment>
FIG. 1 is an overall perspective view of the school bag 11 according to the first embodiment. FIG. 2 is a side view showing a state in which the user 20 carries the school bag 11 shown in FIG. 1 on his back. FIG. 3 is a perspective view showing a state in which the lid plate 16 of the school bag 11 shown in FIG. 1 is opened. FIG. 4 is an enlarged view of part A in FIG. 3, and the backpack belts 17a and 17b are not shown. In the following description, the backrest 13 side (F side (left side) in FIG. 2) of the school bag 11 is in the front, the lid plate 16 side (R side (right side) in FIG. 2) is in the rear, and the left and right in FIG. 2 are in the left-right direction. , Each.

As shown in FIG. 1 or 2, the backpack 11 has a backpack body 14, and the backpack body 14 is in close contact with the back 21 of the user 20. It is provided with a flat back support portion 13 that supports it, and is carried on the back 21 of the user 20 so that textbooks, school supplies, and the like can be stored inside.

The back portion main body 14 having a box shape as a whole makes it possible to open the upper portion by opening the lid plate 16 in the direction of arrow B in FIG. The school bag 11 includes a pair of left and right backpack belts 17a and 17b, and these backpack belts 17a and 17b are hung around the left and right shoulders of the user 20 so as to carry the backpack body 14 on their backs. The upper end portion 17u is supported on the upper part of the backrest portion 13 of the backpack main body 14, and the lower end portion 17d is supported on the lower portion of the backpack portion 13 of the backpack main body 14.

As shown in FIG. 1, a tension band 18 extends from the lower end of the lid plate 16, and a female portion 50 of the buckle 24 is provided at the tip of the tension band 18. On the other hand, the male portion 40 of the buckle 24 is rotatably attached to the bottom surface 15 of the back portion main body 14 (see FIGS. 3 and 4). The female part 50 is removable with respect to the male part 40 of the buckle 24, and the lid plate 16 can be selected from a state in which it is fixed and closed by the buckle 24 and a state in which it can be separated from the buckle 24 and opened. It will be possible.

(Adjusting member)
FIG. 5 shows the plane of the fixing plate 31 on which the pair of adjusting members 30a and 30b, the pair of left and right connecting rings 33a and 33b, and the male portion 40 of the buckle 24 (see FIGS. 1 and 11A) are arranged. FIG. 6 is a bottom view showing the arrangement of the spring 36 with the back cover 31d of the fixing plate 31 removed, and FIG. 7 is a cross-sectional view taken along the line VII-VII'of FIG.

As shown in FIG. 1, on the bottom surface 15 of the back body 14, a pair of adjusting members 30a and 30b are provided on both the left and right sides of the buckle 24. As shown in FIG. 5, in the fixing plate 31, on the left side of the buckle 24 (left side in FIG. 5), a guide hole 32a as a guide path defining the moving direction of the left side connecting ring 33a (first connecting ring) is provided. The provided adjusting member 30a is provided, and on the right side of the buckle 24, an adjusting member 30b provided with a guide hole 32b as a guide path for defining the moving direction of the right connecting ring 33b (second connecting ring) is provided. Has been done.

The material constituting the fixing plate 31 is such that the elastic force of the spring 36 connecting the pair of connecting rings 33a and 33b to each other, the durability and rigidity against the movement of the connecting rings 33a and 33b, the overall weight and weight balance of the land cell 11 and the like. It is preferable to select it in consideration of the above, and it is preferable to use a lightweight and highly durable metal such as aluminum.

The pair of left and right adjusting members 30a and 30b are provided so that the guide holes 32a and 32b provided respectively have a V shape so that the distance between them increases toward the front side, that is, the back support portion 13 side. ing. In other words, in the left-right direction (horizontal direction of FIGS. 5 to 7), the distance between the front side surfaces 31f of the pair of adjusting members 30a and 30b is the distance between the rear side surfaces 31r. It is arranged so that it is larger than.

Regarding this C-shape, in the plan view shown in FIG. 5, the angle θ formed by the extending direction C1 of the straight line connecting the centers of the pair of connecting rings 33a and 33b and the extending direction (predetermined direction) C2 of the guide hole 32a. Is about 140 degrees. This also applies to the direction C1 and the direction C3 in which the guide hole 32b extends. By setting such an angle θ, it is possible to improve the adhesion to the user while ensuring the operability when the user operates the backpack belts 17a and 17b. In order to achieve both operability and adhesion, the angle θ is preferably set in the range of about 120 degrees to 150 degrees, and if it is less than 120 degrees, the backpack belts 17a and 17b are close to the back of the user. Since it extends in the direction, the operability deteriorates, and if it exceeds 150 degrees, the backpack belts 17a and 17b extend in the lateral direction, so that it becomes difficult to secure sufficient adhesion.

As shown in FIGS. 1 and 2, the left connecting ring 33a is joined to the lower end 17d of the left back carrying belt 17a, and the right connecting ring 33b is connected to the lower end 17d of the right back carrying belt 17b. Has been done. The pair of connecting rings 33a and 33b each have an outer diameter larger than the width of the pair of guide holes 32a and 32b. The materials constituting the connecting rings 33a and 33b are preferably selected in consideration of durability and rigidity against movement against the elastic force of the spring 36 and the weight and weight balance of the entire land cell 11. For example. It may be composed of a lightweight metal such as aluminum or a hard synthetic resin.

As shown in FIG. 7, shaft portions 34a and 34b extend from the connecting rings 33a and 33b, respectively, and the shaft portions 34a and 34b extend into the fixing plate 31 along the thickness direction (vertical direction). It is extending. The lower portions of the shaft portions 34a and 34b are inserted into the internal spaces 31a and 31b of 31 via the guide holes 32a and 32b, respectively. As shown in FIGS. 6 and 7, the internal spaces 31a and 31b have symmetrical shapes and are connected to each other via a connecting groove 36a. The connecting groove 36a is a groove recessed without penetrating the internal spaces 31a and 31b vertically. Since the connecting groove 36a has a size smaller than the internal spaces 31a and 31b in both the front-rear direction and the vertical direction, the connecting rings 33a and 33b are not inserted. Therefore, while the connecting rings 33a and 33b can move along the guide holes 32a and 32b, respectively, the intrusion into the connecting groove 36a is restricted.

Disc-shaped stop plates 35a and 35b (nuts) having a diameter larger than the width of the guide holes 32a and 32b are fixed to the shaft portions 34a and 34b, respectively. By arranging the stop plates 35a and 35b in the internal spaces 31a and 31b, it is possible to prevent the connecting rings 33a and 33b from coming off from the guide holes 32a and 32b and to move along the guide holes 32a and 32b. It has become.

As shown in FIGS. 6 and 7, both ends of the spring 36 as an elastic body are fixed to the shaft portions 34a and 34b inserted into the internal spaces 31a and 31b, respectively. The spring 36 is a tension spring, which is arranged in the connecting groove 36a, and both ends thereof are fixed to the shaft portions 34a and 34b in the internal spaces 31a and 31b, respectively.

In other words, the spring 36 has one connecting ring 33a arranged close to the connecting position with the connecting groove 36a in the guide hole 32a so that the connecting rings 33a and 33b approach each other, and the other connecting ring 33a. It has an urging force (elastic force) that displaces the connecting rings 33a and 33b so that the 33b is arranged in the guide hole 32b close to the connecting position with the connecting groove 36a. The connecting rings 33a and 33b are located at the rearmost side when arranged at the connecting position with the connecting groove 36a due to the V-shaped shape of the guide holes 32a and 32b in the fixing plate 31.

When no force is applied from either the left or right backpack belts 17a or 17b, the connecting rings 33a and 33b have the most connecting grooves in the guide holes 32a and 32b due to the elastic force that the spring 36 tries to contract. It is located on the 36a side.

On the other hand, when the user 20 operates the backpack belts 17a and 17b to carry the school bag 11 on his back, the connecting rings 33a and 33b oppose the elastic force of the spring 36 and the guide holes 32a and 33b respond to the operating force. The spring 36 expands as it moves outward in 32b.

For example, when the user 20 pulls the backrest belts 17a and 17b forward while the backrest portion 13 is in contact with the back 21, the connecting rings 33a and 33b are subjected to the elastic force of the spring 36. Move forward and outward. Thereby, the user 20 can adjust the positions of the left and right backpack belts 17a and 17b. Therefore, since the user 20 can form a desired distance between the backpack belts 17a and 17b and the backpack main body 14, the school bag 11 can be easily carried on the back.

On the other hand, when the force for pulling the backpack belts 17a and 17b forward is released, the connecting rings 33a and 33b move rearward and inward along the guide holes 32a and 32b due to the elastic force of the spring 36. Displaced from the state away from the back 21 of the user 20 (state S2 shown by the broken line in FIG. 2) toward the user 20 side (T direction in FIG. 2), and the backpack belts 17a and 17b are brought into close contact with the chest 22 of the user 20. This makes it possible to increase the degree of adhesion between the back 21 of the user 20 and the backrest portion 13 (state S1 shown by a solid line in FIG. 2).

Further, when the user 20 carrying the school bag 11 pulls the backpack belts 17a and 17b forward, the connecting rings 33a and 33b move forward and outward against the elastic force of the spring 36, so that the backpack belts 17a and 17b Since a desired distance can be formed from the chest 22 of the user 20, the backpack belts 17a and 17b can be easily removed from the shoulder of the user 20.

In this way, since the guide holes 32a and 32b are formed in the fixing plate 31 in a V shape that expands toward the front side, the backpack belts 17a and 17b of the user 20 can be more easily detached from the shoulders. It has become.

In the above configuration, the spring 36, which is a coil spring, is used, but if the connecting rings 33a and 33b can be brought close to each other and displaced to the rear side, an elastic body other than the spring, for example, a rubber material or elasticity. It is also possible to use a plastic material having a displacement or a spring having a form other than the coil spring.
Further, the mounting structure of the backpack belt of the first embodiment described above can be applied to a rucksack or other backpack bag other than the land cell.

FIG. 8 is a cross-sectional view showing the configuration of the fixing plate 31 in the modified example, and is a view at a position corresponding to FIG. 7. In the above embodiment, the spring 36 as one tension spring is used to elastically support the two connecting rings 33a and 33b, but instead, as shown in FIG. 8, they are independent of each other. It is also possible to elastically support the two connecting rings 33a and 33b by using the two springs 37a and 37b (elastic bodies).

As shown in FIG. 8, two support portions 38a and 38b are provided at the left and right ends of the connecting groove 36a, respectively, and the end portion of the first tension spring 37a is fixed to one of the support portions 38a. The end of the second tension spring 37b is fixed to the other support portion 38b. The point that the connecting rings 33a and 33b can move along the guide holes 32a and 32b, respectively, is the same as that of the above embodiment.

The left end of the first tension spring 37a is fixed to the lower part of the shaft portion 34a, and the right end is fixed to the support portion 38a. When the user 20 pulls the backpack belt 17a, the connecting ring 33a moves to the left along the guide hole 32a against the elastic force of the first tension spring 37a. On the other hand, when the operation of the user 20 is completed or the backpack belt 17a is not loaded, the first tension spring 37a contracts due to its elastic force, and 33a is compressed by the fixing plate 31. Move to the center side.

The right end of the second tension spring 37b is fixed to the lower part of the shaft portion 34b, and the left end is fixed to the support portion 38b. Also in the second tension spring 37b, when the user 20 pulls the backpack belt 17b, the connecting ring 33b is moved to the right side along the guide hole 32b against the elastic force of the second tension spring 37b. Move to. On the other hand, when the operation of the user 20 is completed or the backpack belt 17b is not loaded, the second tension spring 37b contracts due to its elastic force, and 33b is compressed by the fixing plate 31. Move to the center side.

As for the springs 37a and 37b, similarly to the spring 36, an elastic body other than the spring, for example, a rubber material, an elastic plastic material, or a spring having a form other than the coil spring can be used.

<Buckle>
The school bag 11 selectively has a state in which the tension band 18 is fixed to the lower bottom surface 15 of the backpack body 14, and a state in which the tension band 18 can be separated from the lower bottom surface 15 of the backpack body 14. A buckle 24 that can be selected is provided. FIG. 9 is a perspective view showing the configuration of the male portion 40 and the female portion 50 of the buckle 24. FIG. 10 is a perspective view showing the configuration of the male portion 40 and the disassembled female portion 50. FIG. 11A shows a state before the male part 40 and the female part 50 are engaged, FIG. 11B shows a fixed state in which the male part 40 and the female part 50 are engaged, and FIG. 11C shows the male part. A cross section showing a state after the operating member 80 is slid to disengage the 40 and the female part 50, and (d) shows a state after the male part 40 and the female part 50 are disengaged. It is a figure. FIG. 12A shows a state before the male part 40 and the female part 50 are engaged, FIG. 12B shows a state in which the female part 50 is placed on the male part 40, and FIG. 12C shows a state where the female part 50 is placed on the male part 40. Indicates a fixed state in which the female part 50 is pushed into the male part 40 from the state of the above to engage the female part 50 and the male part 40, and (d) is an operation for disengaging the male part 40 and the female part 50. The state after sliding the member 80 is shown, and (e) is the cross-sectional view which shows the state after disengagement of a male part 40 and a female part 50. 11 (a) to 11 (d) are cross-sectional views taken along the line XI-XI'of FIG. 9, and FIGS. 12 (a) to 12 (e) are positions along the line XII-XII'of FIG. It is a cross section in.

<Female part>
As shown in FIGS. 9 and 10, the female portion 50 has a substantially elongated plate shape extending in the vertical direction (Z1-Z2 direction), and has an outer plate 60, a holding plate 70, an operating member 80, and a back plate. With 90. The operating member 80 is held in a space sandwiched between the recess 71 of the holding plate 70 and the back plate 90 in a state where it can slide in the vertical direction. The outer plate 60 is arranged on the outside (Y2 side) of the holding plate 70 so as to face the holding plate 70 and protects the holding plate 70. The holding plate 70 and the back plate 90 are fixed to each other by the screw 100 shown in FIG. The female part 50 is a non-magnetic material except for the three female part side magnets 84, 85, 86 (second magnet) and has durability against opening and closing operations of the lid plate 16, for example, brass (brass) and titanium. , Stainless steel, synthetic resin.

The holding plate 70 is provided with a recess 71 on the surface on the side where the operation member 80 is arranged, and the recess 71 is provided with two engaging holes 72 and 73 arranged in the vertical direction (predetermined direction). .. The engaging holes 72 and 73 are formed so as to penetrate the holding plate 70 in the thickness direction (Y1-Y2 direction), and have the same planar shape as each other so that the protrusion 42 of the male portion 40 can be inserted. Here, the planar shape is a shape viewed along the thickness direction (Y1-Y2 direction) of the female portion 50.

The operating member 80 is arranged in a space sandwiched between the recess 71 of the holding plate 70 and the back plate 90, and can slide in the vertical direction (Z1-Z2 direction). The operating member 80 can be slid to a position where the upper tip surface 88 abuts on the upper inner surface 71a of the recess 71 in the upward direction (Z1 direction), and can be slid in the downward direction (Z2 direction). The lower end surface 89 can be slid to a position where it abuts on the lower inner surface 71b of the recess 71. The operating member 80 is provided with a tongue portion 87 so as to extend downward from the lower end surface 89, and when the operating member 80 is arranged between the recess 71 of the holding plate 70 and the back plate 90, The tongue portion 87 extends outward, and the operating member 80 can be slid in the vertical direction by grasping and operating the tongue portion 87.

The main body 81 of the operating member 80 is provided with two openings 82 and 83 penetrating in the thickness direction. These openings 82 and 83 have a vertical length in which the protrusion 42 of the male portion 40 can be inserted and the operating member 80 can be slid along the vertical direction with the protrusion 42 inserted. Has.

A pair of protrusions 82a and 82b as second engaging portions are provided in the upper region of the left and right inner surfaces of the lower opening 82 so as to face each other in the left-right direction (X1-X2 direction). There is. The pair of protrusions 82a and 82b are formed so as to approach each other and protrude toward the back plate 90 side. Similarly, a pair of protrusions 83a and 83b are provided so as to face each other in the left-right direction in the upper region of the left and right inner walls of the upper opening 83. The pair of protrusions 83a and 83b are formed so as to approach each other and protrude toward the back plate 90 side.

On the main body 81 of the operating member 80, three female magnets 84, 85, 86 (second magnets) having a rectangular shape in a plan view are arranged at equal intervals in the vertical direction (Z1-Z2 direction). The first female side magnet 84 is arranged so as to be adjacent to the lower side of the lower (Z2 side) opening 82, and the second female side magnet 85 is located between the two openings 82 and 83. The third female magnet 86 is arranged so as to be adjacent to both of them, and is arranged so as to be adjacent to the upper side (Z1 side) of the opening 83. The three female side magnets 84, 85, 86 are arranged so as to be centered on the two openings 82, 83 in the left-right direction, and have a width smaller than that of the two openings 82, 83. These female magnets 84, 85, 86 are arranged so that the same magnetic poles are located on the back plate 90 side, and are between the fixing magnets 43a, 43b (first magnet) provided on the male 40. It has a strength of magnetism so that the tension band 18 is securely fixed and held with respect to the back body 14 when they are magnetically attracted to each other.

The two pairs of protrusions 82a, 82b, 83a, 83b are two adjacent magnets of the three female magnets 84, 85, 86 (second magnets) and two fixing magnets 43a of the male 40. , 43b (first magnet) face each other and are magnetically attracted (see FIG. 11B), and engage or engage with the claws 45a and 45b provided on the protrusion 42 of the male portion 40. It is provided at a stop position (see FIGS. 11 (b) and 12 (c)). Further, when the female portion side magnets 84, 85, 86 of the operating member 80 and the fixing magnets 43a, 43b of the male portion 40 do not face each other due to the slide of the operating member 80 (see FIG. 11C). ), The two pairs of protrusions 82a, 82b, 83a, 83b are disengaged (locked) from the claws 45a, 45b (see FIG. 12D).

The back plate 90 is provided with an opening 91 penetrating in the thickness direction (Y1-Y2 direction). The opening 91 has a shape in which the three female magnets 84, 85, 86 of the operating member 80 and the two openings 82, 83 are projected in the Y1-Y2 directions. Therefore, when the operating member 80 and the back plate 90 are overlapped with each other, the three female magnets 84, 85, and 86 are housed in the opening 91 in a state where the operating member 80 can slide in the vertical direction. Further, when the holding plate 70 and the back plate 90 are fixed to each other with the operating member 80 slidably sandwiched, the engaging hole portion 72 of the holding plate 70 and the opening 82 and the opening 91 of the operating member 80 are in the thickness direction. Through holes connected along the thickness direction are formed, and through holes connected along the thickness direction are also formed for the engaging hole portion 73 of the holding plate 70 and the opening 83 and the opening 91 of the operating member 80.

<Male part>
As shown in FIG. 9 or 10, the male portion 40 is a female portion except for two fixing magnets 43a and 43b as the first magnet and two releasing magnets 44a and 44b as the third magnet. It is composed of the same material as 50, that is, a non-magnetic material having durability against opening and closing operations of the ba, for example, brass (brass), titanium, stainless steel, and synthetic resin.

The male portion 40 includes a recess 41 capable of accommodating the female portion 50 in the center in the width direction (X1-X2 direction). In the plan view of the recess 41, that is, when viewed along the thickness direction (Y1-Y2 direction) of the male portion 40, a protrusion 42 projecting vertically outward is provided at substantially the center of the recess 41. When the male part 40 and the female part 50 face each other along the Y1-Y2 direction, they project toward the female part 50 side. The protrusion 42 is inserted into the engaging holes 72 and 73 of the holding plate 70, the openings 82 and 83 of the operating member 80, and the opening 91 of the back plate 90 in the left-right direction (X1-X2 direction). It has a possible width, and in the thickness direction (Y1-Y2 direction), it has a height such that the tip surface 42a extends outward when it is inserted into the assembled female portion 50 (FIG. 11B). , See FIG. 12 (c)).

In the vertical direction (Z1-Z2 direction), a release magnet 44a as a third magnet is juxtaposed on the lower side (Z2 side) of the protrusion 42, and a first magnet is further below the release magnet 44a. The fixing magnets 43a are arranged side by side. Further, a fixing magnet 43b as a first magnet is juxtaposed on the upper side (Z1 side) of the protrusion 42, and a releasing magnet 44b as a third magnet is juxtaposed on the upper side of the fixing magnet 43b. ing. The fixing magnets 43a and 43b and the releasing magnets 44a and 44b each have a rectangular shape in a plan view. Further, the widths of the fixing magnets 43a and 43b and the releasing magnets 44a and 44b in the vertical direction may be the same as or wider than the widths of the female magnets 84, 85 and 86 provided on the female portion 50. Preferably, this makes it possible to reliably distinguish between magnetic attraction and repulsion to the female magnets 84, 85, 86 depending on the position of the operating member 80.

The distance between the two fixing magnets 43a and 43b as the first magnet in the vertical direction is the same as the distance between the release magnets 44a and 44b as the third magnet, and this distance is the distance between the operating member 80. The distance between the female magnets 84, 85, and 86 is the same.

The two fixing magnets 43a and 43b as the first magnets are arranged so that the same magnetic poles are located on the female portion 50 side when the male portion 40 and the female portion 50 are opposed to each other along the Y1-Y2 direction. Will be done. The magnetic poles of the fixing magnets 43a and 43b have polarities opposite to those of the female magnets 84, 85 and 86 of the operating member 80 in the Y1-Y2 direction. Therefore, when the fixing magnets 43a and 43b of the male portion 40 and the female portion side magnets 84, 85 and 86 of the operating member 80 face each other, they are magnetically attracted to each other.

On the other hand, the release magnets 44a and 44b as the third magnet have magnetic poles arranged in the opposite directions to the two fixing magnets 43a and 43b as the first magnet. Therefore, when these release magnets 44a and 44b and two of the female magnets 84, 85 and 86 of the operating member 80 face each other, they magnetically repel each other.

As shown in FIG. 12, a pair of claw portions 45a and 45b as the first engaging portion extend outward from both side surfaces of the protrusion 42 in the left-right direction (X1-X2 direction). The pair of claw portions 45a and 45b are fixed to the other ends of the pair of springs 46a and 46b (elastic bodies) whose one ends are fixed to the inside of the protrusion 42, respectively, and are outside due to the elastic force of the springs 46a and 46b. It is urged to spread to. If the claw portions 45a and 45b can be urged, elastic members other than the springs 46a and 46b can also be used.
The pair of claw portions 45a and 45b and the springs 46a and 46b are omitted in FIGS. 2 to 10.

<Engagement and disengagement of female and male parts>
Hereinafter, the steps of engaging, fixing, and disengaging the female portion 50 and the male portion 40 will be described with reference to FIGS. 11 and 12.
(1) First, the lid plate 16 is closed, and as shown in FIGS. 11A and 12A, the female portion 50 and the male portion 40 face each other in the thickness direction or the front-rear direction (Y1-Y2 direction). Let me.

(2) Next, by pressing the female portion 50 against the male portion 40, as shown in FIG. 12 (b), the protrusion 42 of the male portion 40 is engaged with the opening 82 on the lower side of the female portion 50. It is inserted into the perforated portion 72. At this time, as shown in FIG. 11B, the female magnets 84 and 85 of the female portion 50 and the fixing magnets 43a and 43b of the male portion 40 face each other, and the attractive forces of the polarities in opposite directions are opposite to each other. By the action of, the female part 50 and the male part 40 are surely attracted by the magnetic force. At this time, as shown in FIGS. 11B and 12C, in the female portion 50, the tip surface 42a of the protrusion 42 protrudes from the surface 74 of the holding plate 70 in the thickness direction (Y1-Y2 direction). Up to, it is adsorbed on the male part 40.

In this process, the pair of protrusions 82a, 82b pushes the pair of claws 45a, 45b into the inside of the protrusion 42, and then enters the inner side (Y1 side) of the pair of protrusions 82a, 82b. In this state, the pair of claw portions 45a and 45b are displaced outward by the elastic force of the pair of springs 46a and 46b, and are restored to the position before the protrusion 42 is inserted into the female portion 50. Therefore, in the thickness direction, the pair of claw portions 45a and 45b engage (lock) so as to restrict the movement of the pair of protrusions 82a and 82b, so that the female portion 50 and the male portion 40 engage with each other. Will be done. Therefore, due to the magnetic attraction between the female magnets 84 and 85 and the fixing magnets 43a and 43b and the restriction of the movement of the protrusions 82a and 82b by the claws 45a and 45b, the female portion 50 and the male portion The engaged state of the 40s is reliably maintained and fixed to each other.

(3) To disengage the female portion 50 and the male portion 40, the operating member 80 slides in the vertical direction (Z1-Z2 direction), that is, the operating member 80 is slid with respect to the female portion 50 and the male portion 40. It is done by moving relative to each other. By this slide, as shown in FIG. 11C, the operating member 80 is displaced to a position where the female magnets 84 and 85 face the release magnets 44a and 44b of the male 40. At this position, as shown in FIG. 12 (d), the protrusions 82a and 82b of the female portion 50 are not in contact with the claw portions 45a and 45b of the male portion 40, and the female portion 50 is from the male portion 40. The restrictions on separation have been lifted. As a result, the female portion 50 and the male portion 40 are separated from each other by the repulsive force between the female portion side magnets 84 and 85 and the release magnets 44a and 44b having the same polarities with each other, and the user 20 can use the user 20. The lid plate 16 can be easily lifted (FIGS. 11 (d) and 12 (e)).

In the above description, the case where the protrusion 42 of the male portion 40 is inserted into the opening 82 and the engagement hole 72 on the lower side (Z2 side) of the female portion 50 has been described, but the opening on the upper side (Z1 side) has been described. The same applies to the case of inserting the 83 and the engaging hole portion 73. Therefore, the protrusion 42 can be selectively inserted into one of the engaging hole 72 and the opening 82 and the engaging hole 73 and the opening 83, whereby the female portion in the vertical direction can be inserted. Since the position of 50 can be changed, the position of the tension band 18 with respect to the back portion main body 14 can be changed according to the storage capacity of the school bag 11.

As described above, in the school bag 11 of the present embodiment, the operation of bringing the female portion 50 closer to the male portion 40 by the magnetic attraction force between the female portion side magnets 84 and 85 and the fixing magnets 43a and 43b, respectively. The lid plate 16 can be easily closed, and the fixed state can be reliably maintained by engaging the protrusions 82a and 82b with the claws 45a and 45b. As a result, vibration during use can be suppressed, so that damage to the fastener can be suppressed.

Further, by sliding the operating member 80, the magnetic attraction between the female part side magnets 84 and 85 and the fixing magnets 43a and 43b can be released, and the female part 50 and the male part can be released by magnetic repulsion. The separated state of 40 can be maintained. Therefore, by such an operation, the lid plate 16 of the school bag 11 can be easily opened and closed.

<Second Embodiment>
FIG. 13 is an overall perspective view of the school bag 101 according to the second embodiment. 14 (a) and 14 (b) are plan views of the fixing plate 102 in which the pair of adjusting members 30a and 30b, the pair of connecting rings 33a and 33b, and the buckle 110 are arranged. The female part 120 and the male part 130 of the buckle 110 show a state in which the female part 120 and the male part 130 are not positioned with respect to the positioning member 140, and (b) shows a state in which the female part 120 and the male part 130 are positioned with respect to the positioning member 140. There is. 15 (a) is a cross-sectional view taken along the line XVA-XVA'of FIG. 14 (a), and FIG. 15 (b) is a cross-sectional view taken along the line XVB-XVB'of FIG. 14 (b). FIG. 16 is a perspective view showing the female portion 120, the male portion 130, and the positioning member 140 constituting the buckle 110 in an exploded manner.

In the second embodiment, instead of the buckle 24 of the first embodiment, the buckle 110 having another configuration shown in FIGS. 13 to 16 is provided. In the following description, the same reference numerals as those of the first embodiment will be used for the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

As shown in FIG. 13, a fixing plate 102 having the same structure and material as the fixing plate 31 of the first embodiment is arranged on the bottom surface 15 of the lower portion of the back portion main body 14. As shown in FIG. 14, in the fixing plate 102, a pair of adjusting members 30a, 30b, a pair of connecting rings 33a, 33b, etc. are provided on the left and right sides of the buckle 110 located at the center, as in the first embodiment. Has been done. Since the pair of adjusting members 30a and 30b and the pair of connecting rings 33a and 33b are common to the first embodiment, detailed description thereof will be omitted.

As shown in FIG. 16, the buckle 110 includes a female portion 120 as a second member provided at the tip of the tension band 18, a male portion 130 as a first member that engages with the female portion 120, and a back cover. A positioning member 140 attached to the bottom surface 15 of the main body 14 (lower part of the back body 14) is provided.
It is also possible to provide a male portion as the second member and a female portion as the first member.

<Female part>
In the first embodiment, the female portion 50 is composed of the outer plate 60, the holding plate 70, the operating member 80, and the back plate 90, but the female portion 120 of the second embodiment also has the same configuration. In the female portion 50 of the first embodiment, the two engaging holes 72, 73, and the corresponding engaging holes 72, 73 in the vertical direction (Z1-Z2 direction) as the positions where the protrusion 42 of the male portion 40 is inserted. Two locations were set in common for the two openings 82 and 83, but only one location was set in the female portion 120 of the second embodiment (see FIG. 16). That is, as in the first embodiment, the holding plate (not shown) is provided with an engaging hole, and the operating member 124 is formed with a hole 121 so as to correspond to the engaging hole. The portion 121 is arranged at the center in the vertical direction.

As shown in FIG. 16, a pair of female magnets 122 and 123 (second magnets) having a rectangular shape in a plan view are arranged at positions symmetrical with respect to the hole 121. As these female side magnets 122 and 123, the same magnets as the female part side magnets 84, 85 and 86 of the first embodiment are used.

The female magnets 122 and 123 are provided on the operating member 124 as in the first embodiment. Similar to the operation member 80 of the first embodiment, the operation member 124 is arranged in the space inside the female portion 120, and can be slidable in the vertical direction by operating the tongue portion 124a extending outward. .. By this slide, the pair of female magnets 122 and 123 are displaced in the vertical direction.

A pair of protrusions 125a and 125b as second engaging portions are provided on the left and right inner surfaces of the hole 121 so as to face each other in the left-right direction (X1-X2 direction). These protrusions 125a and 125b have the same configuration as the pair of protrusions 82a and 82b or the pair of protrusions 83a and 83b in the first embodiment.

In the pair of protrusions 125a and 125b, the two female magnets 122 and 123 (second magnet) and the two fixing magnets 133a and 133b (first magnet) of the male 130 face each other and are magnetic. It is provided at a position where it engages or locks with a claw portion (not shown) provided on the protrusion 132 of the male portion 130 when sucked into the magnet. Further, when the female portion side magnets 122 and 123 of the operating member 124 and the fixing magnets 133a and 133b of the male portion 130 do not face each other due to the slide of the operating member 124, the pair of protruding portions 125a and 125b , The engagement (locking) with the claw portion is released. The structure of the claw portion is the same as that of the claw portions 45a and 45b of the first embodiment.

<Male part>
As shown in FIG. 16, the male portion 130 includes two fixing magnets 133a and 133b as the first magnet and two releasing magnets 134a and 134b as the third magnet, and is similar to the female portion 120. Consists of materials.

The male portion 130 includes a recess 131 capable of accommodating the female portion 120 at the center in the width direction (X1-X2 direction). In the plan view of the recess 131, a protrusion 132 protruding vertically outward is provided, and the protrusion 132 has a male portion 130 and a female portion 120, similarly to the protrusion 42 of the first embodiment. When facing each other, it protrudes toward the female portion 120.

Similar to the first embodiment, a release magnet 134a as a third magnet is juxtaposed on the lower side (Z2 side) of the protrusion 132, and further below the release magnet 134a as a first magnet. Fixing magnets 133a are arranged side by side. Further, a fixing magnet 133b as a first magnet is juxtaposed on the upper side (Z1 side) of the protrusion 132, and a releasing magnet 134b as a third magnet is juxtaposed on the upper side of the fixing magnet 133b. ing. The fixing magnets 133a and 133b and the releasing magnets 134a and 134b each have a rectangular shape in a plan view. Further, the widths of the fixing magnets 133a and 133b and the releasing magnets 134a and 134b in the vertical direction are preferably the same as or wider than the widths of the female magnets 122 and 123 provided on the female portion 120. Thereby, magnetic attraction and repulsion to the female magnets 122 and 123 can be reliably distinguished and obtained depending on the position of the operating member 124.

The vertical distance between the two fixing magnets 133a and 133b as the first magnet is the same as the distance between the release magnets 134a and 134b as the third magnet, and this distance is the same as the distance between the operating members 124. The distance between the female magnets 122 and 123 is the same.

The two fixing magnets 133a and 133b as the first magnets are arranged so that the same magnetic poles are located on the female portion 120 side when the male portion 130 and the female portion 120 face each other. The magnetic poles of the fixing magnets 133a and 133b have the opposite polarities to the female magnets 122 and 123 of the operating member 124. Therefore, when the fixing magnets 133a and 133b of the male portion 130 and the female portion side magnets 122 and 123 of the operating member 124 face each other, they are magnetically attracted to each other.

On the other hand, the release magnets 134a and 134b as the third magnet have magnetic poles arranged in the opposite directions to the two fixing magnets 133a and 133b as the first magnet. Therefore, when these release magnets 134a and 134b and the female magnets 122 and 123 of the operating member 124 face each other, they magnetically repel each other.

As shown in FIG. 16, a pair of engaging portions 136 and 137 are arranged on both side wall portions 135a and 135b in the width direction (X1-X2 direction) of the male portion 130, respectively.

As shown in FIGS. 15A and 15B, the first engaging portion 136 includes a main body portion 136a extending along the width direction, a thin plate portion 136b extending outward from the main body portion 136a in the width direction, and a thin plate portion. A holding portion 136c extending upward from 136b is provided, and the second engaging portion 137 includes a main body portion 137a extending along the width direction, a thin plate portion 137b extending outward from the main body portion 137a in the width direction, and a thin plate portion 137b. It is provided with a holding portion 137c extending upward. The thin plate portions 136b and 137b are formed to be thinner than the main body portions 136a and 137a.

The main body portions 136a and 137a are respectively arranged inside the male portion 130 and extend along the width direction. The main body portions 136a and 137a have inner ends 136d and 137d in the width direction at one end in the expansion and contraction direction of compression springs 138a and 138b arranged so as to expand and contract along the width direction in the male portion 130, respectively. It is fixed. Since the other end of the compression springs 138a and 138b is fixed to the inner wall of 130, the main body portions 136a and 137a are urged outward in the width direction by the elastic force of the compression springs 138a and 138b.

<Engagement and disengagement of female and male parts>
First, the lid plate 16 is closed, and the female portion 120 and the male portion 130 face each other.
Next, by pressing the female portion 120 against the male portion 130, the protrusion 132 of the male portion 130 is inserted into the hole portion 121 of the female portion 120. At this time, the female magnets 122 and 123 of the female portion 120 and the fixing magnets 133a and 133b of the male portion 130 face each other, and the attractive forces of the polarities in opposite directions act on the female portion 120 and the male portion. The part 130 is surely attracted by the magnetic force.

In this process, the pair of protrusions 125a and 125b of the female part 120 pushes the pair of claws (not shown) into the inside of the protrusions 132 and then enters the inner side of the protrusions 132, and the female part 120 and the male part 130 enter. It is the same as in the first embodiment that the engaged state of the above is surely maintained and fixed to each other.

To disengage the female portion 120 and the male portion 130, the operating member 124 is slid along the vertical direction (Y1-Y2 direction), that is, the operating member 124 is disengaged from the female portion 120, as in the first embodiment. This is done by moving relative to the male part 130. By this slide, the operating member 124 is displaced to a position where the female magnets 122 and 123 face the release magnets 134a and 134b of the male 130. At this position, the protrusions 125a and 125b of the female portion 120 are not in contact with the claws (not shown) of the male portion 130, and the restriction that the female portion 120 is separated from the male portion 130 is released. There is. As a result, the female portion 120 and the male portion 130 are separated from each other by the repulsive force between the female portion side magnets 122 and 123 and the release magnets 134a and 134b having the same polarities with each other, and the user 20 can use the user 20. The lid plate 16 can be easily lifted.

<Positioning member 140>
As shown in FIG. 16, the positioning member 140 has a rectangular shape in a plan view, and is made of the same material as the female portion 120 and the male portion 130. A pair of side walls extend along the depth direction (Z1-Z2 direction) and project outward (Y2 side) from the main body 141 at both ends of the positioning member 140 in the width direction (X1-X2 direction). Parts 142 and 143 are provided, respectively.

The first side wall portion 142 includes a guide hole portion 142a (engaged portion) that extends along the depth direction and penetrates in the thickness direction (X1-X2 direction). Similarly, the second side wall portion 143 includes a guide hole portion 143a (engaged portion) that extends along the depth direction and penetrates in the thickness direction.

As shown in FIGS. 16A and 14B, the guide hole portion 142a is provided with three positioning recesses 142b, 142c, 142d in this order at regular intervals in the depth direction. All of these positioning recesses 142b, 142c, 142d are recessed from the guide hole portion 142a toward the outside (Y2 side). The positioning recesses 142b, 142c, 142d are formed in a bottomed groove shape that does not penetrate in the thickness direction (X1-X2 direction) from the inside of the first side wall portion 142.

The guide hole portion 143a provided in the second side wall portion 143 is also provided with three positioning recesses 143b, 143c, 143d, similarly to the positioning recesses 142b, 142c, 142d. The positioning recesses 143b, 143c, and 143d are formed in a bottomed groove shape that does not penetrate in the thickness direction from the inside of the second side wall portion 143. The positioning recesses 143b, 143c, and 143d are provided at positions corresponding to the positioning recesses 142b, 142c, and 142d provided in the first side wall portion 142 in the depth direction (Z1-Z2 direction).

The two guide hole portions 142a and 143a are recessed at a height (Y1-Y2 direction) larger than the thin plate portions 136b and 137b of the first engaging portion 136 and smaller than the main body portions 136a and 137a. There is. The positioning recesses 142b, 142c, 142d of the first side wall portion 142 and the positioning recesses 143b, 143c, 143d of the second side wall portion 143 all have the height combined with the guide hole portions 142a, 143a as the main body. It is recessed so as to be larger than the portions 136a and 137a.

As shown in FIGS. 14A and 14B and FIGS. 15A and 15B, the first engaging portion 136 penetrates the guide hole portion 142a of the first side wall portion 142 from the inside to the outside. The second engaging portion 137 is arranged so as to penetrate the guide hole portion 143a of the second side wall portion 143 from the inside to the outside. At this time, the pressing portion 136c is arranged outside the first side wall portion 142, and the pressing portion 137c is arranged outside the second side wall portion 143.

According to this configuration, the first engaging portion 136 is made movable in the guide hole portion 142a by engaging with the guide hole portion 142a while being urged outward by the compression spring 138a, and the second engaging portion The 137 is urged outward by the compression spring 138b and engages with the guide hole portion 143a so that the 137 can move in the guide hole portion 143a. Therefore, the male portion 130 as a whole can move in the depth direction (Z1-Z2 direction) while being guided by the pair of guide hole portions 142a and 143a. During this movement, as shown in FIGS. 14 (a) and 15 (a), the main body portion 136a abuts on the inner wall of the first side wall portion 142, and the main body portion 137a of the second side wall portion 143. It is in contact with the inner wall.

In the movement of the male portion 130 in the depth direction, the first engaging portion 136 reaches the position of the positioning recess 142c, and the second engaging portion 137 reaches the position of the positioning recess 143c facing the positioning recess 142c. As shown in FIGS. 14 (b) and 15 (b), the first engaging portion 136 is displaced outward by the elastic force of the compression spring 138a, and the main body portion 136a penetrates into the positioning recess 142c. The second engaging portion 137 also abuts on the inner wall, is displaced outward by the elastic force of the compression spring 138b, and the main body portion 137a invades into the positioning recess 143c and abuts on the inner wall. As a result, the movement of the main body 136a in the depth direction (Z1-Z2 direction) is restricted in the positioning recess 142c, and the movement of the main body 137a in the depth direction is also restricted in the positioning recess 143c. The position in the depth direction is fixed as a whole. Therefore, since the position of the female portion 120 attached to the male portion 130 is also determined, the position of the tension band 18 attached to the female portion 120 is also determined.
In addition, such an action in the positioning recesses 142c and 143c facing each other is such that the first engaging portion 136 reaches another positioning recess 142b, 142d, and the second engaging portion 137 is another positioning recess 143b. The same applies when 143d is reached.

In the male portion 130 fixed as described above, when the two pressing portions 136c and 137c facing each other are pushed inward so as to approach each other, the two compression springs 138a and 138b contract. At this time, the main body 136a that was in contact with the inner wall of the positioning recess 142c is separated from the inner wall of the positioning recess 142c, and the main body 137a that was in contact with the inner wall of the positioning recess 143c is also separated from the inner wall of the positioning recess 143c. The restrictions on movement in the depth direction by the positioning recesses 142c and 143c are released, and the male portion 130 is in a state where it can move along the depth direction. From this state, when the first engaging portion 136 is moved to the positions of the other positioning recesses 142b and 142d and the second engaging portion 137 is moved to the positions of the other positioning recesses 143b and 143d, the tension band The position of 18 can be changed, and the opening degree of the lid plate 16 can be adjusted.
Although the present invention has been described with reference to the above-described embodiment, the present invention is not limited to the above-described embodiment, and can be improved or modified within the purpose of improvement or the idea of the present invention.

As described above, the backrest according to the present invention can ensure the operability of attaching and detaching the backpack belt, and when worn, the entire backrest portion of the backrest portion main body easily comes into contact with the back of the user. However, it is useful in that it is possible to secure a good wearing state with an increased degree of adhesion.

11 school bag (backpack)
13 Back support part 14 Back part body 15 Bottom surface 16 Cover plate 17a, 17b Backrest belt 17d Lower end 17u Upper end 18 Tension band 20 User 21 Back 22 Chest 24 Buckle 30a, 30b Adjusting member 31 Fixing plate 31a, 31b Inside Space 31d Back side cover 31f, 31r Side surface 32a, 32b Guide hole (guidance path)
33a, 33b Connecting ring 34a, 34b Shaft 35a, 35b Stop plate 36 Spring (elastic body)
36a Connecting groove 37a, 37b Spring (elastic body)
38a, 38b Support part 40 Male part 41 Recession 42 Protrusion 42a Tip surface 43a, 43b Fixing magnet 44a, 44b Release magnet 45a, 45b Claw part 46a, 46b Spring 50 Female part 60 Outer plate 70 Holding plate 71 Recession 71a, 71b Inner surface 72, 73 Engagement hole 74 Surface 80 Operation member 81 Main body 82, 83 Opening 82a, 82b, 83a, 83b Projection 84, 85, 86 Female side magnet 87 Tongue 88 Tip surface 89 Lower End face 90 Back plate 91 Opening 100 Screw 101 Land cell (back)
102 Fixing plate 110 Buckle 120 Female part (second member)
121 Holes 122, 123 Female side magnet 124 Operating member 124a Tongue 125a, 125b Projection 130 Male part (first member)
131 Recessed 132 Protruding body 133a, 133b Fixing magnet 134a, 134b Release magnet 135a, 135b Side wall part 136 First engaging part 136a Main body part 136b Thin plate part 136c Holding part 136d End part 137 Second engaging part 137a Main body Part 137b Thin plate part 137c Holding part 137d End part 138a, 138b Compression spring 140 Positioning member 141 Main body part 142 First side wall part 142a Guide hole part 142b, 142c, 142d Positioning recess 143 Second side wall part 143a Guide hole part 143b, 143c, 143d Positioning recess C1 Direction for connecting a pair of connecting rings C2, C3 Direction for extending the guide hole (predetermined direction)

Claims (12)

On the front side, a backrest body with a backrest that is supported in contact with the user's back,
The backrest body is hung around the left and right shoulders of the user so that the backrest body is carried on the back, the upper end thereof is supported on the upper part of the backrest, and the lower end side is supported on the lower part of the backrest body. A pair of left and right backpack belts
A pair of left and right connecting rings for joining the lower ends of the pair of backpack belts to the lower part of the backrest body, respectively.
It is provided with an adjusting member provided at the lower part of the back portion main body.
The adjusting member has a dorsal force that causes the pair of connecting rings to approach each other and to be displaced toward the rear side. The back cover according to claim 1, wherein the adjusting member is a single tension spring, and the pair of connecting rings are joined to both ends thereof. Each of the pair of connecting rings is displaced along a pair of guide holes provided so as to extend along a predetermined direction.
The back cover according to claim 1, wherein the angle formed by the direction connecting the pair of connecting rings and the predetermined direction is set in the range of 120 degrees to 150 degrees. The adjusting member includes a first tension spring and a second tension spring that are independent of each other.
The pair of connecting rings includes a first connecting ring corresponding to one of the pair of backpack belts and a second connecting ring corresponding to the other of the pair of backpack belts.
One end of the first tension spring is fixed to the lower part of the dorsal body, and the other end is joined to the first connecting ring.
The back cover according to claim 1, wherein one end of the second tension spring is fixed to the lower part of the back cover body, and the other end is joined to the second connecting ring. A lid plate that allows the back body to be opened and closed and a tension band extending from the lower end,
A claim including a buckle that allows the tension band to be selectively selected between a state in which the tension band is fixed to the lower part of the back part body and a state in which the tension band can be separated from the lower part of the back part body. The buckle according to any one of claims 1 to 3. The buckle has a female part on one of the tip of the tension band and the lower part of the dorsal part main body, and a male part on the other.
An operating member is provided on one of the male portion and the female portion so as to be movable relative to the male portion and the female portion.
The male portion comprises a protrusion that projects vertically outward from the surface to which the female portion is fixed.
A first engaging portion that projects outward is provided on the side surface of the protrusion.
The female portion is arranged in order along the direction in which the tension band extends, and has a plurality of engaging hole portions into which the protrusion can be selectively inserted.
A first magnet is provided on the male portion and the female portion, whichever is not provided with the operating member.
The operating member includes a plurality of openings and a plurality of second magnets arranged at positions corresponding to each of the plurality of engaging holes, and a second engaging portion projecting inward from the inner surface of the openings. With and
When the protrusion of the male portion is selectively inserted into any of the plurality of engaging holes, the first magnet is attracted by magnetic attraction between the first magnet and the second magnet. The engaging portion and the second engaging portion are engaged with each other, and the male portion and the female portion are fixed to each other.
By sliding the operating member along the predetermined direction from the state where the male part and the female part are fixed to each other, the position of the second magnet with respect to the first magnet is shifted, and the first engagement is performed. The back cover according to claim 5, wherein the joint portion and the second engaging portion are disengaged to release the fixed state between the female portion and the male portion. The operating member is provided on the female portion, and the operating member is provided on the female portion.
The first magnet is a surface on which the female portion is fixed in the male portion and is provided around the protrusion.
The male part is provided on the front surface of the main body of the bag, and the female part is provided on the lid plate.
The first magnets are arranged one by one on the surface of the male portion with the protrusions interposed therebetween along the predetermined direction.
The female portion has two engaging holes arranged along the predetermined direction.
Two engagement holes and two openings are provided at intervals corresponding to the distance between the two first magnets.
The fastener according to claim 6, wherein three of the second magnets are arranged in the predetermined direction with the engaging hole portion interposed therebetween. On the surface of the male portion, two third magnets having a polarity opposite to that of the first magnet are arranged so as to be adjacent to the two first magnets, respectively, and the male portion and the female portion are arranged. When the operating member is slid along the predetermined direction from the state where the portions are fixed to each other, the magnetic attraction between the first magnet and the second magnet is released, and the first magnet is released. 3. The fastener according to claim 7, wherein a magnetic repulsion occurs between the magnet and the second magnet. The buckle is attached to a positioning member attached to the lower part of the back body, a first member attached so as to be relatively movable along a direction in which the tension band extends with respect to the positioning member, and the first member. On the other hand, a second member provided at the tip of the tension band is provided so as to be removable.
One of the first member and the second member is a male part, and the other is a female part.
An operating member is provided on one of the male portion and the female portion so as to be movable relative to the male portion and the female portion.
The male portion comprises a protrusion that projects vertically outward from the surface to which the female portion is fixed.
The female portion has an engaging hole portion into which the protrusion can be inserted.
A first magnet is provided on the male portion and the female portion, whichever is not provided with the operating member.
The operating member includes an opening and a second magnet.
When the protrusion of the male portion was inserted into the engaging hole portion, the male portion and the female portion were fixed to each other by magnetic attraction between the first magnet and the second magnet. Become a state,
From the state where the male part and the female part are fixed to each other, the operating member is slid along the predetermined direction to shift the position of the second magnet with respect to the first magnet, thereby causing the female part. And release the fixed state of the male part,
By engaging the engaging portion of the first member and the engaged portion of the positioning member, the first member is attached to the positioning member in a state where it can move relative to the direction in which the tension band extends. Be,
The positioning member includes a plurality of positioning recesses provided in the engaged portion in a direction in which the tension band extends.
The back cover according to claim 5, wherein the relative movement of the first member is restricted by engaging the engaging portion of the first member with the positioning recess. The engaged portion is a recess provided so as to extend along the direction in which the tension band extends, and is arranged outside the side surface of the first member that extends in the direction in which the tension band extends. ,
The back cover according to claim 9, wherein the engaging portion is formed so as to extend from the side surface of the first member toward the engaged portion side on the outside. The first member includes an elastic member that urges the engaging portion to the outside.
The back cover according to claim 10, wherein the positioning recess is a recess in the engaged portion in which the engaging portion is recessed deeper along the direction of being urged by the elastic member. The engaged portion is provided so as to penetrate the wall portion of the positioning member along the urging direction of the elastic member.
The engaging portion of the first member is arranged so as to penetrate the wall portion, and a holding portion is provided at the tip thereof.
A claim for disengaging the positioning recess and the engaging portion by operating the holding portion so that the elastic member is contracted along the urging direction against the elastic force of the elastic member. Item 2. The back cover according to item 11.

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