CN216220570U - Comfortable decompression spine protection knapsack - Google Patents

Abstract

The utility model discloses a comfortable pressure-reducing spine-protecting backpack, comprising: the backpack comprises a backpack body, an elastic belt and straps, wherein a cavity is arranged at the back of the backpack body; the elastic belt is arranged in the cavity and extends along the up-down direction, the lower end of the elastic belt is connected with the backpack body, and the elastic belt is suitable for elastic expansion along the up-down direction; the lower end of each strap is connected with the lower portion of the backpack body, the upper end of each strap is suitable for extending downwards into the cavity from the upper portion of the cavity and is connected with the upper end of the elastic belt, the elastic belts are arranged in a left-right spaced mode, and the straps are in one-to-one correspondence with the two elastic belts. By applying the technical scheme, the back pressure can be reduced, the purpose of pressure reduction and spine protection is achieved, and the use comfort is improved.

Description

Comfortable decompression spine protection knapsack

Technical Field

The utility model relates to the technical field of hand-carried articles or traveling articles, in particular to a comfortable pressure-reducing spine-protecting backpack.

Background

In the related art, most backpacks are only provided with common straps, the weight and pressure of the backpacks are applied to the bearing parts of the shoulders, the back and the like of the human body for a long time, the discomfort of the human body is easily caused, the fatigue is strong, and the use experience is poor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one object of the present invention is to provide a comfortable pressure-reducing spine-protecting backpack with an elastic belt, which can reduce the back pressure, achieve the purpose of reducing pressure and protecting spine, and improve the use comfort.

A comfortable, pressure-reducing, spine-protecting backpack according to an embodiment of the present invention includes: the backpack comprises a backpack body, an elastic belt and straps, wherein a cavity is arranged at the back of the backpack body; the elastic belt is arranged in the cavity and extends along the up-down direction, the lower end of the elastic belt is connected with the backpack body, and the elastic belt is suitable for elastic expansion along the up-down direction; the lower end of each strap is connected with the lower portion of the backpack body, the upper end of each strap is suitable for extending downwards into the cavity from the upper portion of the cavity and is connected with the upper end of the elastic belt, the elastic belts are arranged in a left-right spaced mode, and the straps are in one-to-one correspondence with the two elastic belts.

According to the comfortable pressure-reducing spine-protecting backpack disclosed by the embodiment of the utility model, the back pressure can be reduced, the purpose of reducing pressure and protecting spine is achieved, and the use comfort is improved.

In addition, the comfortable decompression spine protection backpack according to the above embodiment of the present invention may also have the following additional technical features:

in some embodiments, the cavity has a guide groove extending in the up-down direction, and at least a portion of the elastic band is disposed in the guide groove and is elastically deformable in the up-down direction.

In some embodiments, the backpack body comprises: the protective sleeve is arranged in the cavity and covers the mounting surface in the cavity, so that the guide groove is formed between the protective sleeve and the mounting surface, wherein the mounting surface is the front side surface or the rear side surface in the cavity.

In some embodiments, the protecting cover is a long strip extending along the up-down direction, and the left and right sides of the protecting cover are connected to the backpack body to form the guiding groove.

In some embodiments, the lower side edge of the protective sleeve and the lower edge of the elastic band are stacked and connected to the bottom of the backpack body, and the upper side edge of the protective sleeve forms a stacked edge structure.

In some embodiments, further comprising: a reinforcing band extending in an up-down direction, a lower end of the reinforcing band being connected to the shield sleeve, and an upper end of the reinforcing band being connected to an upper end of the elastic band and/or an upper end of the back band, the reinforcing band being configured to limit a length of the elastic band in which the elastic band is telescopically deformed in the up-down direction.

In some embodiments, the backpack body comprises: the back plate covers the back face of the main body part, the cavity is formed between the back plate and the back face of the main body part, and an opening is formed between the upper end of the back plate and the upper end of the main body part so that the strap can extend into the cavity.

In some embodiments, the left side, the right side, and the bottom of the back plate are connected to the main body, the middle of the top of the back plate is connected to the main body, and the left side and the right side of the middle of the top of the back plate are separated from the main body to form an opening for inserting a strap into the cavity.

In some embodiments, further comprising: and a reinforcing band extending in an up-down direction, a lower end of the reinforcing band being connected to the backpack body, and an upper end of the reinforcing band being connected to an upper end of the elastic band and/or an upper end of the shoulder strap, the reinforcing band being configured to limit a length of the elastic band in which the elastic band is telescopically deformed in the up-down direction.

In some embodiments, the reinforcing strip is configured to retain an upper end of the elastic strip within the cavity.

In some embodiments, the left side and the right side of the lower portion of the backpack body are provided with triangular pieces, one side of each triangular piece is connected with the backpack body, and the lower ends of the straps are fixedly connected with the corresponding triangular pieces.

In some embodiments, the lower end of the elastic strap is attached to the bottom of the backpack body.

In some embodiments, the ratio of the height of the upper end of the elastic strap in a natural state relative to the bottom surface of the backpack to the overall height of the backpack is in the range of 2/3 to 9/10.

In some embodiments, the ratio of the height of the upper end of the elastic strap in an extended state relative to the bottom surface of the backpack to the overall height of the backpack is in the range of 2/3 to 1.

Drawings

Figure 1 is a schematic structural view of a comfortable, pressure-reducing, spine-protecting backpack according to some embodiments of the present invention.

Figure 2 is an exploded view of a comfortable pressure relief spine protection backpack according to some embodiments of the present invention.

Figure 3 is a schematic structural view of a comfortable pressure relief spine support backpack of some embodiments of the present invention (in a state without a back panel installed).

Figure 4 is an exploded view of a comfortable pressure relief spine protection backpack (showing reinforcement straps) according to some embodiments of the present invention.

Reference numerals:

the backpack 100, the backpack body 1, the main body part 11, the mounting surface 111, the back plate 12, the convex part 121, the shoulder strap 2, the adjusting buckle 21, the elastic belt 3, the protective cover 4, the reinforcing belt 5, the triangle 6, the handle 7 and the pocket 8.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

With reference to fig. 1-4, a comfortable, pressure-reducing, spine-protecting backpack 100 according to an embodiment of the present invention includes: backpack body 1, elastic belt 3 and braces 2. The back of the backpack body 1 is provided with a cavity; the elastic band 3 is provided in the cavity and extends in the up-down direction, the lower end of the elastic band 3 is connected to the backpack body 1, and the elastic band 3 is configured to be elastically stretchable in the up-down direction. Particularly, the elastic belt 3 is arranged in the cavity, so that the elastic belt 3 can elastically deform relatively freely, the back of a user is prevented from being affected, the elastic belt 3 can be prevented from being exposed and damaged, the elastic belt 3 can be shielded, and the attractiveness is improved. The elastic belt 3 is connected with the backpack body 1, and the elastic belt 3 elastically stretches along the up-down direction, so that the gravity of the backpack body 1 can be borne to a certain degree, if the elastic belt 3 stretches under the action of the tensile force or the gravity of the backpack 100, the elastic belt 3 stretches under the action of the elastic force to relieve the pressure. Further, the lower end of the shoulder strap 2 is connected to the lower part of the backpack body 1, and the upper end of the shoulder strap 2 is adapted to extend downward into the cavity from the upper part of the cavity and is connected to the upper end of the elastic strap 3. Thus, the backpack 100 can be conveniently carried by hand or carried on the back or arm. Wherein, elastic webbing 3 includes about two that the interval was arranged, braces 2 include with two elastic webbing 3 one-to-one two, the user can bear knapsack 100 with the both shoulders to slow down pressure of bearing, and do benefit to and improve knapsack 100 equilibrium, the atress homogeneity improves and uses the comfort.

According to the comfortable pressure-reducing spine-protecting backpack 100 provided by the embodiment of the utility model, the elastic belt 3 which can elastically stretch and retract along the vertical direction is arranged between the backpack body 1 and the shoulder straps 2, so that the pressure of the shoulder straps 2 can be reduced, the effect of reducing pressure and protecting spine is achieved, and the use comfort is improved.

In addition, compared with a scheme of connecting two shoulder straps by using one elastic strap, the inventor finds that the scheme causes the elastic force of the elastic strap to be too large and influences the effect of pressure reduction and spine protection after careful comparison and analysis.

In practical application, the upper end of the elastic belt 3 is connected with the shoulder strap 2, the lower end of the elastic belt 3 is connected with the backpack body 1, the upper end of the shoulder strap 2 is connected with the elastic belt 3, and the lower end is connected with the lower part of the backpack body 1. When in use, the two corresponding braces 2 and the elastic belts 3 can be carried on the shoulders. Put and place more article in the knapsack body 1 and when weight is great, deformation can take place along upper and lower direction for elastic webbing 3 is upwards drawn to the upper end of braces 2 for elastic webbing 3 is extended, and elastic webbing 3 energy storage can play the effect of consumptive power, thereby slows down pressure. Wherein, elastic band 3 can select elastic band 3 that the coefficient of stiffness is great to improve elastic band 3's toughness and durability, when the article that hold in the knapsack body 1 are less, elastic band 3 can not stretched, can avoid knapsack 100 to take place to rock when using.

Optionally, the backpack body 1 may not be provided with a cavity, and the elastic belt 3 and the shoulder strap 2 are directly arranged on the back of the backpack body 1; or only a shield covering the elastic band 3 may be provided.

In some embodiments of the utility model, as shown in fig. 3, the cavity has a guide groove extending in the up-down direction, and at least a portion of the elastic band 3 is disposed in the guide groove and is elastically deformable in the up-down direction. Specifically, at least a part of the elastic band 3 is arranged in the guide groove extending vertically, so that the guide groove can play a role in limiting the movement of the elastic band 3, for example, the guide groove can limit the left and right deviation of the elastic band 3 when stressed, and the guide groove can also be arranged in a mode of limiting the front and back shaking of the elastic band 3, so as to improve the stability of the elastic band 3 and the stability of the backpack 100.

Of course, the cavity may not have a guide groove, or a positioning belt or other members may be used to restrict the swing of the elastic belt 3, or a part of the elasticity may be fixedly connected to the back of the backpack body 1.

With reference to fig. 3, optionally, the backpack body 1 comprises: the protective sleeve 4 is arranged in the cavity and covers the mounting surface 111 in the cavity, so that a guide groove is formed between the protective sleeve 4 and the mounting surface 111, wherein the mounting surface 111 is the front side surface or the rear side surface in the cavity. Specifically, the protective cover 4 is directly arranged on the mounting surface 111, and a guide groove is formed between the mounting surface 111 and the protective cover 4, so that the structure is simplified, and the mounting stability of the elastic band 3 can be improved. For example, the mounting surface 111 may be a front side surface in a cavity, so that the protective cover 4 may be directly connected to the mounting surface 111 by sewing, for example, the width of the protective cover 4 may be set according to the width of the elastic band 3, so as to improve the limiting and positioning effects of the guide groove. Of course, the mounting surface 111 may be a rear side surface of the cavity, and the present invention is not limited thereto.

In combination with the following embodiments, the backpack body 1 may include a main body 11 and a back panel 12, and the back panel 12 covers the back surface of the main body 11 to form a cavity, in this case, the mounting surface 111 may be the back surface of the main body 11 or the front side surface of the back panel 12. In addition, the structure of the guide groove can be constructed by connecting the front side surface and the rear side surface in the cavity.

Optionally, the protecting cover 4 is in a shape of a long strip extending in the up-down direction to be suitable for positioning and limiting the elastic band 3, and the left and right sides of the protecting cover 4 are connected with the backpack body 1 to form guide slots. That is to say, can construct the guide slot between lag 4 and the knapsack body 1, in the guide slot was located to some of elastic webbing 3, can make elastic webbing 3 and knapsack body 1's laminating nature better, did benefit to elastic webbing 3 dispersion knapsack body 1's gravity, improved the decompression effect, in addition, the left and right sides limit of lag 4 links to each other with knapsack body 1 for elasticity can be flexible along upper and lower direction in the guide slot, and simple structure, the manufacturing of being convenient for. In actual manufacturing, the left side and the right side of the elongated protection sleeve 4 can be sewn on the backpack body 1, wherein the width of the protection sleeve 4 can be slightly larger than the width of the elastic belt 3, so that the elastic belt 3 can be accommodated in the guide groove, and the elastic belt 3 can move in the guide groove.

With reference to fig. 2 and fig. 3, optionally, the lower side of the protecting sleeve 4 and the lower side of the elastic band 3 are stacked and connected to the bottom of the backpack body 1, so that the elastic band 3 can be reinforced at the bottom of the backpack body 1, the stability of the installation of the elastic band 3 is improved, the upper side of the protecting sleeve 4 forms a stacked structure, a double-layer structure can be formed, the stability of the elastic band 3 during connection and use is improved, the structural strength of the backpack 100 is improved, and the durability of the backpack 100 is further improved.

With reference to fig. 4, optionally, the method further includes: reinforcing band 5, reinforcing band 5 extend along upper and lower direction, and the lower extreme of reinforcing band 5 links to each other with lag 4, and the upper end of reinforcing band 5 links to each other with the upper end of elastic webbing 3 and/or the upper end of braces 2, and reinforcing band 5 is constructed to be suitable for the length of restriction elastic webbing 3 along the flexible deformation of upper and lower direction to play the effect of protection elastic webbing 3, can avoid when schoolbag body weight is great, elastic webbing 3 is great and receive the damage by tensile degree. Specifically, the length of the reinforcing band 5 in the natural state can be slightly longer than that of the elastic band 3 in the natural state, so that the elastic band 3 can stretch out and draw back within a certain range to relieve pressure, and the situation that the elastic band 3 stretches out and draws back longer and the backpack body 1 shakes a lot to cause discomfort can also be avoided. That is, when the elastic band 3 is extended to a certain extent, the reinforcing band 5 may restrict the elastic band 3 from being extended further in the up-down direction.

It should be noted that the length of the reinforcing strip 5 can be adjusted according to the actual situation to limit the stretching length of the elastic strip 3 to a proper range, for example, when the volume of the backpack body 1 is small, the contained articles are small, the weight is light, and therefore the length of the reinforcing strip 5 can be reduced properly.

With reference to fig. 2, optionally, the backpack body 1 comprises: the back plate 12 covers the back surface of the main body 11, a cavity is formed between the back plate 12 and the back surface of the main body 11, and an opening is formed between the upper end of the back plate 12 and the upper end of the main body 11 so that the shoulder strap 2 can extend into the cavity. Specifically, the cavity may be used to accommodate the straps 2 and the elastic band 3, which may protect the elastic band 3 and improve the overall aesthetics of the backpack 100. When the elastic belt 3 stretches, the back belt 2 connected with the elastic belt 3 can stretch out and draw back properly at the opening, so that the pressure reduction effect is improved.

Further, since the side of the back plate 12 away from the main body 11 is in direct contact with the back of the human body, the back plate 12 can be made of a softer or breathable material to improve the comfort of use. With reference to fig. 1 and 2, a convex portion 121 protruding from the surface may be disposed on a side of the back plate 12 away from the main body 11, and the convex portion 121 may be disposed as a soft layer to improve the comfort of use. Specifically, the upper surface of the side of the back plate 12 away from the main body 11 may be configured with an H-shaped soft layer protrusion 121, so as to improve the comfort when the back contacts the back plate 12; the soft layer protrusions 121 may be formed in a V-shape structure with an opening facing downward to improve the comfort when the waist portion is in contact with the back plate 12. Wherein, the convex portion 121 can be configured to match with the convex position of the back of the human body, for example, to match with the scapula and the waist, wherein the convex portion 121 can include an upper half portion and a lower half portion, the upper half portion and the lower half portion are spaced apart from each other, an arc-shaped groove protruding upwards in the middle is formed between the upper half portion and the lower half portion, and the upper half portion is in the shape of a groove with an upward opening in the middle, so as to match with the back, thereby further improving the comfort of the backpack 100.

Alternatively, the left, right and bottom sides of the backboard 12 are connected to the main body portion 11, the middle of the top of the backboard 12 is connected to the main body portion 11, and the left and right sides of the middle of the top of the backboard 12 are separated from the main body portion 11 to construct an opening suitable for inserting the harness 2 into the cavity.

Optionally, the main body 11 may further be provided with a handle 7, the handle 7 is located in a middle area of the top of the main body 11, the handle 7 may facilitate carrying the backpack, or hanging the backpack on a hook to facilitate storage and placement, and the handle 7 may be fixedly connected with the main body 11 by sewing.

Optionally, the main body 11 may further be provided with pockets 8, and the pockets 8 may be disposed on the left and right sides of the main body 11, so that a user can store a cup or a small article, and can directly take articles with one hand, thereby improving convenience. Optionally, a plurality of pockets may be disposed on the front surface of the main body 11 to facilitate the user to store articles in different areas.

With reference to fig. 4, optionally, the pressure-reducing spine-protecting backpack 100 further comprises: and a reinforcing strip 5, wherein the reinforcing strip 5 extends along the up-down direction, the lower end of the reinforcing strip 5 is connected with the backpack body 1, the upper end of the reinforcing strip 5 is connected with the upper end of the elastic strip 3 and/or the upper end of the shoulder strap 2, and the reinforcing strip 5 is configured to limit the length of the elastic strip 3 which can stretch and deform along the up-down direction. That is, the reinforcing band 5 may be connected to the upper end of the elastic band 3 or the upper end of the shoulder strap 2 from the backpack body 1 to improve the stability of the connection of the reinforcing band 5, so that the reinforcing band 5 may overlap the elastic band 3 to limit the overall extension range of the elastic band 3, thereby protecting the elastic band 3 and improving the stability of the backpack. For example, the lower ends of the reinforcing band 5 and the elastic band 3 may be connected to the lower portion of the backpack body 1, and the upper ends of the reinforcing band 5 and the elastic band 3 may be fixedly connected to the upper end of the shoulder strap 2, so as to improve the structural strength of the connection between the reinforcing band 5 and the elastic band 3, i.e., the shoulder strap 2, and improve the durability of the backpack 100.

Optionally, the reinforcing strip 5 is configured to confine the upper end of the elastic strip 3 within the cavity, i.e. by providing the reinforcing strip 5 such that the upper end of the elastic strip 3 does not protrude out of the cavity when it reaches its longest. The length of the reinforcing belt 5 can be larger than that of the elastic belt 3 in a natural state, so that the elastic belt 3 has a telescopic space, and the length of the reinforcing belt 5 can also limit the upper end of the elastic belt 3 to extend out of the cavity, so that the elastic belt 3 is prevented from being damaged due to too long stretching of the elastic belt 3, and the service life of the elastic belt 3 is shortened; the backpack 100 can be prevented from shaking greatly due to the large expansion degree of the elastic belt 3; it also improves the aesthetics of the backpack 100 and prevents the elastic strap 3 from leaking out of the cavity. In practice, the length of the reinforcing strip 5 may be determined by testing, for example, the tensile length and the degree of the tensile force of the elastic strip 3 when the weight of the backpack 100 is different, so as to determine the suitable maximum extension length of the elastic strip 3, and thus the length of the reinforcing strip 5, so as to limit the extension degree of the elastic strip 3 within a reasonable range.

Referring to fig. 1, optionally, triangular pieces 6 are disposed on both left and right sides of the lower portion of the backpack body 1, one side of each triangular piece 6 is connected to the backpack body 1, and the lower ends of the straps 2 are fixedly connected to the corresponding triangular pieces 6. Namely, the lower part of the back plate 12 body can be connected with the lower end of the strap 2 through the triangle 6, on one hand, the connection stability can be improved; on the other hand, the lower ends of the straps 2 are connected to the left side and the right side of the lower part of the backpack body 1, and when the straps 2 are connected with the side edges of the lower part of the backpack 100, the connecting angle between the lower ends of the straps 2 and the lower part of the backpack 100 can be changed by the triangular piece 6, so that the straps 2 are smooth after being connected and suitable for being carried. Specifically, triangle 6 can be right triangle, and wherein the hypotenuse of triangle 6 links to each other with knapsack body 1 lower part, and the right-angle side links to each other with braces 2 lower extreme, does benefit to and improves braces 2 planarization and bear stability. Of course, the lower end of the shoulder strap 2 may be connected to the lower part of the backpack body 1 without providing the triangular member 6.

Alternatively, the lower end of the elastic band 3 is connected to the bottom of the backpack body 1, which can improve the connection strength, facilitate the increase of the length of the elastic band 3, and facilitate the manufacture and assembly.

Optionally, the shoulder strap 2 may be provided with an adjusting buckle 21, the adjusting buckle 21 is provided at the lower part of the shoulder strap 2, and the user may adjust the length of the shoulder strap 2 by adjusting the adjusting buckle 21 to adapt to different situations, thereby improving the carrying comfort. Specifically, the shoulder strap 2 may be composed of an upper strap and a lower strap, wherein the upper strap may be made of a soft material, for example, a flexible layer that can absorb shock is filled in the upper strap to improve the comfort when the shoulder strap 2 contacts the shoulder, the lower strap may be a general belt having a smaller width than the upper strap, the lower end of the upper strap is fixedly connected to the upper end of the lower strap, and the adjustment buckle 21 is mounted on the shoulder strap 2 through the lower strap.

Referring to fig. 2 and 4, the ratio of the height of the upper end of the elastic band 3 with respect to the bottom surface of the backpack 100 in a natural state to the total height of the backpack 100 is optionally in the range of 2/3 to 9/10 to ensure the strength and toughness of the elastic band 3, improve the decompression effect, and contribute to the improvement of durability. The ratio of the elastic band 3 to the overall height of the backpack 100 may also be adjusted according to the elasticity of the elastic band 3 and the size and function of the backpack 100, and the present invention is not limited thereto.

Alternatively, the ratio of the height of the upper end of the elastic band 3 in an extended state with respect to the bottom surface of the backpack 100 to the overall height of the backpack 100 is in the range of 2/3 to 1. From this, can avoid elastic webbing 3 extension less, the decompression effect is not obvious, perhaps extends the overlength and leads to knapsack 100 to rock great, elastic webbing 3 life-span short scheduling problem, does benefit to and improves decompression effect and durability.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under", "beneath" and "beneath" a second feature may be that the first feature is directly under or obliquely below the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. A comfortable, pressure-reducing, spine-protecting backpack, comprising:

the backpack comprises a backpack body, wherein a cavity is arranged at the back of the backpack body, and a guide groove extending along the vertical direction is arranged in the cavity;

the elastic belt is arranged in the cavity and extends along the vertical direction, at least one part of the elastic belt is arranged in the guide groove and can elastically deform along the vertical direction, the lower end of the elastic belt is connected with the backpack body, and the elastic belt is suitable for elastic expansion along the vertical direction;

the lower end of the shoulder strap is connected with the lower part of the backpack body, and the upper end of the shoulder strap is suitable for extending downwards into the cavity from the upper part of the cavity and is connected with the upper end of the elastic belt; the elastic belts comprise two elastic belts which are arranged at intervals left and right, and the braces comprise two elastic belts which correspond to the two elastic belts one by one;

wherein, the knapsack body includes: the protective sleeve is arranged in the cavity and covers the mounting surface in the cavity, so that the guide groove is formed between the protective sleeve and the mounting surface, and the mounting surface is the front side surface or the rear side surface in the cavity.

2. The comfortable, pressure-reducing, spine-protecting backpack of claim 1,

the protective sleeve is in a strip shape extending along the vertical direction, and the left side edge and the right side edge of the protective sleeve are connected with the backpack body to form the guide grooves; and/or

The lower side edge of the protecting sleeve and the lower edge of the elastic band are stacked and connected to the bottom of the backpack body, and a stacked edge structure is constructed on the upper side edge of the protecting sleeve.

3. The comfortable, pressure-reducing, spine-protecting backpack of claim 1, further comprising:

a reinforcing band extending in an up-down direction, a lower end of the reinforcing band being connected to the shield sleeve, and an upper end of the reinforcing band being connected to an upper end of the elastic band and/or an upper end of the back band, the reinforcing band being configured to limit a length of the elastic band in which the elastic band is telescopically deformed in the up-down direction.

4. The comfortable, pressure-reducing, spine-protecting backpack of claim 1, wherein the backpack body comprises:

a main body portion;

the back plate covers the back face of the main body part, the cavity is formed between the back plate and the back face of the main body part, and an opening is formed between the upper end of the back plate and the upper end of the main body part so that the shoulder strap can extend into the cavity.

5. The comfortable, pressure-reducing, spine-protecting backpack of claim 4, wherein the back panel has left, right, and bottom edges that are connected to the body portion, the top portion of the back panel has a center that is connected to the body portion, and the top portion of the back panel has left and right sides that are separated from the body portion to define an opening for insertion of a harness into the cavity.

6. The comfortable, pressure-reducing, spine-protecting backpack of claim 1, further comprising:

and a reinforcing band extending in an up-down direction, a lower end of the reinforcing band being connected to the backpack body, and an upper end of the reinforcing band being connected to an upper end of the elastic band and/or an upper end of the shoulder strap, the reinforcing band being configured to limit a length of the elastic band in which the elastic band is telescopically deformed in the up-down direction.

7. The comfortable, pressure-reducing, spine-protecting backpack of claim 6, wherein the reinforcing strap is configured to trap an upper end of the elastic strap within the cavity.

8. The comfortable, pressure-reducing, spine-protecting backpack of claim 1,

the left side and the right side of the lower part of the backpack body are respectively provided with a triangular piece, one side of each triangular piece is connected with the backpack body, and the lower end of each strap is fixedly connected with the corresponding triangular piece; and/or

The lower end of the elastic belt is connected to the bottom of the backpack body; and/or

The ratio of the height of the upper end of the elastic strap in a natural state relative to the bottom surface of the backpack to the overall height of the backpack is in the range of 2/3 to 9/10; and/or

The ratio of the height of the upper end of the elastic strap in the extended state relative to the bottom surface of the backpack to the overall height of the backpack is in the range of 2/3 to 1.

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