CN111772325A - Implementation method of shoulder-protecting and spine-protecting healthy backpack - Google Patents

Abstract

The invention relates to a method for realizing a shoulder-protecting and spine-protecting healthy backpack, which is characterized in that a bionic backpack shoulder strap with a fish bone structure is originally designed, the shoulder strap applying the principle can enable the shoulder strap to be perfectly attached and stressed with a multi-curved-surface three-dimensional structure formed by shoulders, shoulder backs and forechests of a human body, and the uniform stress distribution brings excellent comfort, thereby realizing real shoulder protection; the invention innovatively moves the connecting point of the shoulder belt and the bag body to the top of the bag body, and the spine does not need to overcome the outward moment of the bag body on the extension line of the gravity center of the bag body, thereby realizing the real spine protection; the invention starts from practicability, particularly adopts the combined design of the soft fabric bag body and the U-shaped box body supporting frame, the bag body is inserted into the U-shaped frame to form the box body bag, and the U-shaped frame can be drawn out for machine washing, thereby realizing real practicability and health.

Description

Implementation method of shoulder-protecting and spine-protecting healthy backpack

Technical Field

The invention relates to a design method of a backpack, in particular to an implementation method of a shoulder-protecting and spine-protecting healthy backpack.

Background

Backpack bags tend to carry a greater amount of weight, resulting in a greater applied load on the body, particularly the shoulders and spine.

Among people using the backpack, the body of the teenager student is in the development period, and the requirement of the industry standard on the backpack of the student is the highest, so the backpack is mainly designed for the student, and is also suitable for leisure backpacks, fashion backpacks, computer backpacks and the like.

The requirements of the industry standard on the backpack of students mainly comprise 'burden reduction', 'shoulder protection', 'spine protection' and 'health'.

Unfortunately, many students ' backpacks have replaced the concepts of ' burden reduction ', ' shoulder protection ', ' spine protection ' and ' health ' in the aspect of functional propaganda, and related industry standards of China are explained in the aspects.

The industrial standard WS/T585 plus 2018 school bag sanitation requirement for students in middle and primary schools stipulates that the total weight of a school bag carried by the student does not exceed 10% of the weight of the student.

The trade standard QB/T2858 and 2007 student book pocket 4.1 relates to the requirements of the schoolbag structure, the back of the schoolbag has a supporting function, and the supporting material can be polyurethane cotton (sponge), polyvinyl chloride foam plastic and the like which meet the sanitary requirements. The schoolbag of type 3 (the schoolbag is suitable for the height of a student to be 128.0 cm-143.9 cm) and the schoolbag of type 4 (the schoolbag is suitable for the height of the student to be less than 128.0 cm) can be matched with a waistband and a chest strap.

The requirement of the industry standard QB/T2858 and 2007 student book pocket 4.1.8 on comfort level, the design of the shoulder belt book pocket is in accordance with the ergonomic requirement of the body of a user: namely, after the shoulder, the back and the waist are attached to the curve of the human body, the human body feels comfortable, and the human body reaches a balanced state when being carried on the back. The supporting part on the back of the book pocket should be soft and elastic for buffering, and no salient point (corner) part with concentrated pressure should appear ".

The requirement of the trade standard QB/T2858 and 2007 student book pocket 4.8.2 on the book pocket belt is that the whole belt width is not less than 40mm in the support area; the length of the book pocket can be uniformly and continuously adjusted by one hand, and the book pocket band does not clamp the neck of a person carrying the book pocket and cannot become loose or fall off due to unintended reasons.

It can be seen from the requirements of the industry standard that "relieving" is to fundamentally avoid the condition that the backpack carried by young students is too heavy, because the position of the spine is changed to adapt to the load due to the overweight, so that the intervertebral disc is compressed, the back pain of children is caused, and the skeletal posture change such as humpback is further developed.

The load reduction is realized by reducing the total weight of the schoolbag for the students, and the size ranges of the schoolbag correspond to different heights in the specification, namely the capacity of the schoolbag is limited. The elastic shoulder straps or thickened polyurethane cotton shoulder straps or S-shaped shoulder straps cut on the plane or buffer polyurethane cotton pads are added on the back of the schoolbag, so that the burden can be reduced by more than 30 percent, and the misleading is realized in fact.

From the requirements of the industry standard, the design of the shoulder pad and the spine pad meets the human engineering requirements of the body of a user: namely, after the shoulder, the back and the waist are attached to the curve of the human body, the human body feels comfortable, and the human body reaches a balanced state when being carried on the back. The requirements for "fit" and "balance" of the design of existing backpack products are not understood to be even spurious.

In addition, the luggage case and the schoolbag are combined together, and the pull rod schoolbag is pushed out. In fact, when the schoolbag is pulled in the same direction for a long time to walk, the stress direction of the spine is usually deviated to one side, and the lateral bending of the spine is easily caused.

In conclusion, a healthy student backpack should be backpack, and the design emphasis is on "fitting" and "balancing".

Disclosure of Invention

The following discussion refers to the accompanying drawings in which like reference characters and letters refer to the same or similar elements throughout the different views unless otherwise indicated. The following discussion will relate to the force analysis of the bag body and the shoulder strap, and because the shoulder strap has friction with the shoulder, the force at the joint of the shoulder strap and the bottom of the bag body is small, so the force at the joint is ignored in the following discussion, and the analysis is not performed.

The invention relates to a shoulder-protecting and spine-protecting healthy backpack which comprises shoulder straps, a backpack body and a U-shaped frame.

The ideal state of the backpack carried on the back is shown in fig. 1, i.e. the back of the backpack is attached to the back of the body. The shoulder straps act on the top A points of the back of the bag body, F represents the pulling force of the shoulder straps, O represents the gravity center of the bag body after the bag body is carried, G represents the gravity of the bag body after the bag body is carried, L represents the distance from the O points to the back of the human body, and M = G × L represents the moment towards the outside of the body.

It will be appreciated that due to the moment M, the body of the backpack will flip outwardly until the next equilibrium is reached. As shown in fig. 2, when the pulling force F of the shoulder strap is through the center of gravity O, the moment acting on the backpack is zero, and the back of the backpack forms an angle θ with the vertical.

As shown in fig. 3, the actual state of the backpack carried on the back shows that the β angle changes with the θ angle, and the tensile force F = F1/COS β (F1 ≈ G) of the shoulder strap is smaller as the β angle is smaller, and the tensile force F of the shoulder strap is generated by the frictional force F (shoulder) between the shoulder and the shoulder strap, where F (shoulder) = μ (shoulder) × F1.

It should be noted that F2 in fig. 3 is the pressure force perpendicular to the back, which is resolved by the pulling force F of the shoulder strap, F2= F1 × tan β, and it is known that the smaller the angle θ, the smaller the angle β, and the smaller the pressure force F2 perpendicular to the back, which is the point of action of the pressure force at the contact between the bottom and waist of the backpack, as shown in fig. 4.

Therefore, the smaller the camber angle of the backpack body, the lower the pressure to be applied to the shoulder part and the lower the pressure to be applied to the waist part, so the design of the backpack is to make the inclination angle theta close to 0 when the backpack is in the balanced state as much as possible.

In order to achieve the purpose that the back of the backpack is attached to the back of a body, namely the inclination angle theta is close to 0, most of school bags with load reduction adopt a method that an adjustable chest belt and an adjustable waist belt are added, and the back of the backpack can be attached to the back by tightening the chest belt and the waist belt. The mode can be accepted by being applied to adult backpacks, but the mode is applied to teenager schoolbag with caution.

The requirements of the schoolbag structure are related to the requirements of the industry standard QB/T2858-2007 student book pocket 4.1, and the schoolbag with the model 3 (the schoolbag is suitable for the height of a student of 128.0 cm-143.9 cm) and the model 4 (the schoolbag is suitable for the height of the student of less than 128.0 cm) can be provided with a waistband and a chest strap. The definition in the standard is that the schoolbag used by students with the height of below 143.9cm can be matched with a waist belt and a chest belt or not, but the schoolbag used by students with the height of more than 143.9cm can not be matched with the waist belt and the chest belt (not including adults).

The following table shows the requirements of the schoolbag structure, the main size of the schoolbag of 4 types and the application range of the height of students, in the trade standard QB/T2858 and 2007 student book pocket 4.1. It can be understood that the size and the dead weight of the schoolbag are limited based on the purpose of burden reduction by the industry standard, and the sizes of the small schoolbag 3 and the small schoolbag 4 can be designed with a waistband and a chest strap, but the necessity is not great; the two major schoolbag of the model 1 and the model 2 cannot be designed with a waistband and a chest belt, particularly cannot be designed with the chest belt, because teenagers in the age are in the body development stage, the chest belt presses the chest of girls to influence the development.

The joints of the shoulder straps of the existing backpack and the backpack body are all arranged at the upper part of the back surface of the backpack body, and even if the mode of designing the waist straps and the chest straps is adopted to ensure that the back surface of the backpack body is attached to the back of the body, namely the inclination angle theta is close to 0, the pressure of the external force F2 on the waist is removed.

Fig. 5 shows the backpack designed with a waist band and a chest band in a back position. Although the bag is restrained on the back of the body by the shoulder straps, chest straps and waist straps, external moment M is present and the heavier the bag center of gravity towards the outer bag weight, the greater M (M = G × L), the muscles and spine of the body must provide counter moment to achieve overall balance. It is characterized by that the posture of body is changed, the forward inclination degree of head and trunk is increased, and the gait, plantar pressure and lower limb joint stress are also changed, so that it can seriously damage the normal development of teenagers.

In order to achieve the purpose that the inclination angle theta is close to 0 and overcome the damage of the external moment M to muscles and a spine, the invention specially designs that the connecting point of the shoulder strap and the bag body is moved to the top of the bag body and the extension line of the gravity center of the bag body, as shown in figure 6.

From the force analysis of fig. 6, F = F1/COS β, F2= F1 × tan β, where F1 and G action points coincide, the external moment M =0, and the inclusion inclination angle θ = 0.

F2 in fig. 6 is the pressure perpendicular to the back, resolved by the tension F of the shoulder straps, and unlike F2 in fig. 3, which presses against the lumbar spine, F2 in fig. 6 is further advantageous in that it causes the back of the backpack to create a friction force F (back) = μ (back) × F2 with the back of the body, which friction force F (back) bears a portion of the weight of the bag, i.e., F1= G-F (back), whereas F1 is the pressure to which the shoulders are subjected.

Therefore, the gain effect of moving the connection point of the shoulder strap and the bag body to the extension line of the top gravity center of the bag body is as follows: the pressure on the shoulder is reduced more comfortably, and the spine does not need to overcome the external moment M, thus being more beneficial to healthy development. FIG. 7 shows the effect of the prepared sample when the sample is carried on the back under the same conditions, wherein the sample specially selects a gift wrapping belt with a smooth surface as a shoulder belt, and five books are contained in a cosmetic box with a surface coating as a bag body, so as to reduce the interference of friction force. Experiments strongly prove that the balance state of the bag body attached to the back can be achieved without any auxiliary means.

Further, eliminating the external moment M is a sufficient condition to avoid the back flexion of the spine, but reducing the pressure on the shoulder is only a necessary condition to address the comfort of the shoulder. The shoulder portion is comfortable when pressed rather than being pricked, and the pressure per unit area, i.e. the pressure, must be lower. Therefore, it is more comfortable to reduce the total force on the shoulder and to distribute the total force over a larger area.

It is known that increasing the force-bearing area is to increase the force-bearing contact area of the shoulder strap with the shoulder, i.e. the contact is to be stressed, not simply to be a fit. However, it is difficult to apply force to the attached parts because the whole of the shoulders, backs and chest of the human body is a three-dimensional structure composed of different curved surfaces, and the multi-curved-surface three-dimensional structure model is different from human to human. The height, the short, the fat, the thin, the thickness of the shoulder and the thickness of the neck of the body form unique and different multi-curved surface three-dimensional structure models, which requires that the design of the shoulder straps is suitable for all the structure models, and the design is not capable of being realized by the straight-line type or S-shaped shoulder straps cut out in a plane.

Fig. 8 and 9 show the actual effect of the linear shoulder strap backpack when carried. The folds can be obviously seen at the outer side of the joint of the shoulder strap and the bag body, and meanwhile, the outer side of the shoulder strap has a gap with the shoulder part and is not jointed, so that the linear shoulder strap can not be jointed with a three-dimensional structure. That is, no matter how wide the linear shoulder is, only a line near the neck base actually fits the body and is forced. Because the stressed area is too small, the pressure is the largest and the comfort level is extremely low under the action of the same pressure.

FIG. 10 is a transverse force distribution curve of a straight shoulder strap, in which the shoulder strap is largely unstressed in the transverse direction and the force is concentrated on one side edge, which causes a strong strangling sensation at the neck base of the user.

Fig. 11 shows the actual effect of the S-shaped shoulder strap backpack when worn, and it can be seen that there is also a gap between the outside of the shoulder strap and the shoulder and that the S-shaped bend can be slightly turned up by hand when the chest strap is not fastened, indicating that the part is not stressed. Because the shoulder belt adopts the S-shaped design, the fitting degree of the shoulder belt and the body is improved, and the effect is better than that of a linear shoulder belt. However, the fit is just an artifact, and the improvement of the fit is not equal to the substantial improvement of the force distribution. The stress points can be found to be still distributed on a line by directly pulling the two ends of the S-shaped shoulder strap by hands, and the stress distribution of the S-shaped shoulder strap is similar to that of the linear shoulder strap. Fig. 12 shows the distribution of the stress of the S-shaped shoulder strap when the S-shaped shoulder strap backpack is worn, and the distribution is still linear.

Fig. 13 is a transverse force curve of the S-shaped shoulder strap, showing that the force points are also very concentrated.

The existing 'burden reduction' schoolbag basically adopts two methods when solving the problem of concentrated stress distribution:

the first solution is to increase the thickness of the shoulder strap with polyurethane cotton material, which in fact cushions and distributes the pressure moderately (fig. 14).

The second method is that the shoulder strap is designed to be elastic, the contact area between the shoulder strap and the shoulder is increased by elastic deformation, and the stress distribution is improved (fig. 15).

In order to realize the optimal shoulder strap stress distribution, the invention uses the bionic design of the fishbone structure for reference (figure 16). The spine of the fishbone is connected by joints, has three degrees of freedom of transverse, longitudinal and rotation, can swing or rotate in any direction within a certain range, and can enable the shoulder strap to perfectly fit and bear force with a multi-curved-surface three-dimensional structure formed by the shoulder, the back and the chest of a human body when being applied to the shoulder strap; the fishbone has the characteristic that the fishbone is more elastic as the fishbone is closer to the tip, so that the fishbone can perfectly fit the body and maximally share the pressure in the transverse direction.

In order to vividly illustrate the actual effect of the fishbone bionic shoulder strap, the sample adopts elastic materials to manufacture flying saucer-shaped sheet-shaped units, and the sheet-shaped units are movably connected with each other to manufacture the shoulder strap (fig. 17).

The sample is a variant of the fishbone biomimetic shoulder strap, other forms of which will be illustrated in the examples. The effect of the sample in actual bearing is shown in fig. 18, and experiments prove that the fishbone bionic shoulder strap can tightly fit a multi-curved-surface three-dimensional structure of a body at any position, the effect of bearing pressure on the shoulder strap in the transverse direction is very good, and no protruding pressure points or pressure lines exist on the shoulder and the back of the shoulder, so that the fishbone bionic shoulder strap has excellent comfort.

Fig. 19 is a transverse stress distribution curve of the fishbone bionic shoulder strap, and discrete points on the curve are symmetrically distributed and have no obvious pressure concentration points.

Further, the factors influencing the force distribution of the shoulder straps also include the initial angle of connection of the shoulder straps to the bag body. As shown in fig. 20, the straight shoulder strap attachment design using a fixed angle is a serious drawback, and the initial angle designed according to the width and thickness of the model's shoulder neck is not suitable for all users. The shoulder neck width of the user is larger than that of the model, so that the stress on the inner side edge of the shoulder strap is increased; conversely, a user having a neck with a smaller width than the model will tend to put more force on the outside edges of the shoulder straps.

As shown in fig. 21, the pressure distribution effect of the S-shaped shoulder strap attachment design using a fixed angle is better than that of the straight-type shoulder strap attachment design using a fixed angle. However, since the force transmission follows the principle of shortest path, the inner edge line of the two arcs of the S-shaped shoulder strap is the shortest path. Therefore, the stress of the S-shaped shoulder strap is mostly distributed on the shortest path, and the outer edges of the two arc-shaped sections of the S-shaped shoulder strap are basically in a suspended state and are not stressed. However, the initial fixed angle still affects the fitting degree of the shoulder strap to the shoulder and neck, so the fixed angle is still a design defect.

The shoulder strap of the invention is designed into a multi-section connecting structure with three degrees of freedom of transverse direction, longitudinal direction and rotation, and the shoulder strap can be freely attached to the shoulder and neck and ensure the uniform distribution of stress no matter the shoulder strap and the bag body adopt a fixed angle connection or a variable angle mechanism connection mode.

The back of the backpack body of the existing backpack mostly adopts a cushion pad consisting of thickened polyurethane cotton, polyvinyl chloride foam plastic and fabric, so that the structure is claimed to reduce pressure and protect the spine, ventilate and perspire, and obviously the assumed components are too heavy. The bag body is characterized in that the bag body is vertically downward, the horizontal pressure of the bag body on the back of a human body is not large, the cushion pad with proper thickness is necessary, and the bag body is too thick and is suitable for countermeasures.

It can be known that, the knapsack inclusion that has pectoral girdle and waistband forms outside moment M because the effect of gravity, and moment M is the important factor that causes backbone dysplasia or damage, because M = G L (L = inclusion focus to the distance of backbone), the blotter is thicker can increase M on the contrary, can cause bigger injury to the backbone.

It is known that cotton garments are able to provide warmth because the fluffy and porous structure contains a large amount of air which forms a poor conductor of heat. The thick back cushion pad and the thick shoulder straps which are composed of polyurethane cotton, polyvinyl chloride foam and fabric, and the chest straps and the wide waist straps are just like wearing a cotton vest, but can cause more stuffiness and perspiration.

As can be appreciated, a large number of backpacks using polyurethane foam and PVC foam as filler are noted to be only capable of being wiped and not machine washable. However, the wiping can not completely remove sweat and dust adsorbed in the polyurethane cotton, so that bacteria and microorganisms can be bred, and the health of a user can be directly affected.

The natural latex material with proper thickness and antibacterial effect is used as the cushion material, the healthy skin-friendly fabric is covered outside the cushion material, colloid particles are uniformly distributed on the surface of the fabric at intervals, and the colloid particles have the effect of increasing the friction coefficient.

Furthermore, the schoolbag is used as a backpack for carrying books and stationery with special purposes, the interior of the bag body is a hard and square box body, so that the books can be effectively prevented from being curled, and the soft backpack is obviously not suitable for the purpose.

Furthermore, the machine washing of the schoolbag is an important factor to be fully considered in the design. In order to ensure the physical health of teenagers, the schoolbag must be cleaned frequently and deeply to remove dust and bacteria in the inner and outer surfaces and the inner wrapping materials of the schoolbag body, so that the schoolbag must be capable of bearing frequent machine washing.

The invention fully considers the practical requirements of the schoolbag on a hard and solid square box body and frequent machine washing, and particularly adopts the combined design of a soft fabric bag body and a U-shaped frame. The U-shaped frame (figure 22) is inserted between the outer surface fabric and the lining fabric of the bag body from the lower part of the bag body to support the back, the bottom and the front of the bag body. When the schoolbag needs to be cleaned, the zipper at the bottom of the schoolbag is unzipped, the U-shaped frame is drawn out, and the schoolbag can be cleaned by a machine except the U-shaped frame.

The technical scheme provided by the invention can have the following beneficial effects: the bionic backpack shoulder strap with the fishbone structure is originally designed, the shoulder strap applying the technology can be perfectly attached to and stressed by a multi-curved-surface three-dimensional structure formed by the shoulder, the shoulder back and the chest of a human body, and the uniform stress distribution brings excellent comfort, so that the real shoulder protection is realized; the invention innovatively moves the connecting point of the shoulder belt and the bag body to the top of the bag body, and the spine does not need to overcome the outward moment M of the bag body on the extension line of the gravity center of the bag body, thereby realizing the real spine protection; the invention starts from practicability, particularly adopts the combined design of the soft fabric bag body and the U-shaped frame, the bag body is inserted into the U-shaped frame to be the box body bag, and the bag can be washed by a machine after the U-shaped frame is drawn out, thereby realizing real practicability and health.

It is to be understood that both the foregoing analysis and description are exemplary and explanatory only and are not restrictive of the scope and applicability of the invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention by way of illustration.

Figure 1 shows the force applied to a conventional backpack in a vertical position.

Fig. 2 shows the balance of the prior backpack under the action of the moment M.

Fig. 3 shows the force analysis of the prior backpack without a chest belt and a waist belt in a balanced state after being turned outwards under the action of the moment M.

Fig. 4 shows the actual carrying effect of the existing backpack without the chest belt and the waistband under the action of the moment M.

The prior backpack of fig. 5 having a chest strap and a waist strap is subjected to a moment M when being worn.

FIG. 6 is a force analysis of the backpack of the present invention while being worn.

FIG. 7 is a graph comparing the effect of samples of the prior art backpack and the inventive backpack when carried.

Figure 8 actual effect of the sides when the linear shoulder strap backpack is carried.

Figure 9 actual effect of the back side when the linear shoulder strap backpack is carried.

FIG. 10 is a lateral force distribution curve of the linear shoulder strap.

Fig. 11 shows the actual effect of the S-shaped shoulder harness backpack when worn.

Fig. 12 shows the force distribution of the backpack with the S-shaped shoulder straps.

Fig. 13 is a transverse force distribution curve of the S-shaped shoulder strap.

FIG. 14 is a transverse force distribution curve of a shoulder belt made of thickened sponge materials.

Figure 15 shows the force distribution profile across the shoulder straps of elastic material.

Fig. 16 is an abstract view of a fishbone.

Fig. 17 fishbone bionic shoulder strap.

Fig. 18 shows the practical application effect of the fishbone bionic shoulder strap.

FIG. 19 is the transverse stress distribution curve of the fishbone bionic shoulder strap.

FIG. 20 shows a straight shoulder strap with a fixed angle.

FIG. 21 shows an S-shaped shoulder strap with a fixed angle.

Fig. 22 is a U-shaped frame.

Fig. 23 shows a fishbone bionics integrated shoulder strap.

FIG. 24 shows the transverse cross section of the fishbone-bionic integrally formed shoulder strap.

FIG. 25 shows a split fishbone bionic shoulder strap.

Fig. 26 fishbone bionic split shoulder strap.

FIG. 27 is a view of the U-shaped frame inside the bag body.

Figure 28 is an overall perspective view of a shoulder-and spine-protecting health backpack.

Detailed Description

Reference will now be made to exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which like reference characters and letters refer to the same or similar elements throughout the different views, unless otherwise specified.

The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

The invention relates to a shoulder-protecting spine-protecting health-care backpack which comprises a machine-washable backpack body, a U-shaped box supporting frame and a pair of fishbone bionic shoulder straps.

The fishbone bionic shoulder strap has three degrees of freedom of transverse direction, longitudinal direction and rotation, can enable the shoulder strap to be perfectly attached to and stressed by a multi-curved-surface three-dimensional structure formed by the shoulder, the shoulder back and the chest of a human body, and has the characteristic that the deformed fishbone is more elastic as being closer to the tip part, so that the structure and the material characteristic can perfectly attach to the body and can maximally share the pressure in the transverse direction.

An exemplary embodiment of a fishbone biomimetic shoulder strap is shown in fig. 23, and the shoulder strap is made of an integrally formed design, and the material is selected from a solid silicone rubber material. The physical properties required by the shoulder strap have larger strength and smaller elasticity in the longitudinal direction to bear the tensile force; not taking up the tensile forces in the transverse direction but requiring a good elastic sharing of the compression forces. Therefore, the solid silicone rubber is chemically treated according to the use requirement, nylon fibers are added in the longitudinal direction, and the deformed fishbone is designed into a fish belly sill shape, as shown in fig. 24.

Another exemplary embodiment of the fishbone bionic shoulder strap is shown in fig. 25, the shoulder strap is of a split design, the flying saucer-shaped units are connected by rivets, the flying saucer-shaped units are made of composite materials of carbon fibers and PC, and the outer surface of the flying saucer-shaped units is coated with silica gel materials.

A third exemplary embodiment of the fishbone bionic shoulder strap is shown in fig. 26, the shoulder strap is of a split design, the special-shaped units are made of light metal, the units are connected through steel pins, and the outer surface of the special-shaped units is coated with a silica gel material.

The connecting point of the fishbone bionic shoulder strap and the bag body is moved to the top of the bag body, and the connecting piece is movably arranged on the extension line of the gravity center of the bag body and can be detached.

The U-shaped box body supporting frame is made of multiple layers of PC materials, and an angle of 60 degrees is preset between the front face and the bottom face of the U-shaped frame. As shown in fig. 27, the front surface of the frame generates a certain pressure on the book in the bag body, and the pull belt with the thread gluing can better restrain the articles in the bag body and avoid the swing of the gravity center of the bag body.

The machine washable bag body is made of wear-resistant washable fabrics, and the other reason for machine washing is that no plastic materials such as polyurethane cotton and polyvinyl chloride foam plastics are contained in the bag body. The box structure formed by the bag body of the invention is the result of using a U-shaped frame, and other fillers are not needed.

The present invention is not limited to the above embodiments, which are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements, etc. within the principle and scope of the present invention are included in the present invention.

Claims (9)

1. The invention relates to a method for realizing a shoulder-protecting and spine-protecting healthy backpack, which is characterized by comprising original bionic backpack shoulder straps, original connecting parts of the shoulder straps and a backpack body and an original U-shaped box body supporting frame.

2. The bionic backpack shoulder strap with the fishbone structure is originally designed, the shoulder strap applying the principle can be perfectly attached to and stressed by a multi-curved-surface three-dimensional structure formed by the shoulder, the back and the chest of a human body, and the uniform stress distribution brings about excellent comfort, thereby realizing real shoulder protection.

3. The bionic shoulder strap of a fishbone structure of claim 2, characterized in that: the spine of the fishbone is connected by joints, has three degrees of freedom of transverse, longitudinal and rotary, can swing or rotate in any direction within a certain range, can enable the shoulder strap to perfectly fit and bear the force with a multi-curved-surface three-dimensional structure formed by the shoulder, the back and the chest of a human body when being applied to the shoulder strap, and the fishbone has the characteristic of elasticity when being closer to the tip part, so that the structure and the material characteristic can perfectly fit the body and can maximally share the pressure in the transverse direction.

4. The invention creatively moves the connecting point of the shoulder belt and the bag body to the top of the bag body, and the spine does not need to overcome the outward moment of the bag body any more on the extension line of the gravity center of the bag body, thereby realizing the real spine protection.

5. The connection point of the shoulder strap to the bag body of claim 4, wherein: the connecting point is positioned on the extension line of the gravity center of the bag body, and the advantage is that the outward moment M =0 of the bag body is caused by the design, and the outward moment M is a key factor causing the bending deformation of the spine, and is represented by that the posture of the body is changed, the forward inclination degree of the head and the trunk is increased, and the gait, the pressure of the sole and the stress of the lower limb joint are changed.

6. The invention starts from practicability, particularly adopts the combined design of the soft fabric bag body and the U-shaped box body supporting frame, the bag body is just a box body bag when being inserted into the U-shaped frame, and the bag body with the U-shaped frame can be mechanically washed after being drawn out, thereby realizing real practicability and health.

7. A U-shaped box support frame according to claim 6, characterized in that: the U-shaped frame plays a supporting role, a soft package body which can be washed by a machine is changed into a box body bag, and the box body bag can better protect books and other articles from curling; the design that the angle of 60 degrees is preset between the front surface and the bottom surface of the U-shaped frame can well restrain articles in the bag body and avoid the gravity center swing of the bag body.

8. The machine washable of claim 6, wherein: the bag body is free of moulding materials such as polyurethane cotton, polyvinyl chloride foam plastic and the like, so that the bag can be frequently washed by a machine; the backpack must be cleaned frequently to remove dust and bacteria on the inner and outer surfaces of the backpack and the inner wrapping material.

9. Any modification, equivalent replacement, improvement and the like made within the principle and scope of the invention are included in the protection scope of the invention.

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