CN113995222A

CN113995222A - Backpack

Info

Publication number: CN113995222A
Application number: CN202111082006.4A
Authority: CN
Inventors: 谢安; 刘舟; 张晨
Original assignee: Xiaopai Life Shanghai Enterprise Development Co ltd
Current assignee: Xiaopai Life Shanghai Enterprise Development Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-02-01

Abstract

The invention discloses a backpack, which comprises a backpack body and a back plate, wherein the backpack body is used for bearing a loading function, the back plate is in contact with the back of a human body, the backpack body is fixedly arranged on a backpack plate, a mounting plate, a transmission system and an energy storage device are arranged between the backpack plate and the back plate, the transmission system and the energy storage device are simultaneously connected onto the mounting plate to play a main load reduction role of the backpack, and a limiting auxiliary system is also arranged between the backpack plate and the back plate.

Description

Backpack

Technical Field

The invention relates to the field of labor-saving devices for mechanical transmission, in particular to a backpack.

Background

In daily life, people often use the backpack to carry articles with relatively large weight, so how to reduce the load of a user by changing the backpack structure becomes a problem which needs to be solved urgently.

In the prior art, most backpacks are provided with guide rails on both sides, and are directly connected with elastic devices or connected with load and elastic devices through various pulleys and steel wire ropes to design a load reduction mechanism. The postures of human body activities are variable, the guide rail needs to bear forces in all directions when different postures are needed besides the main activities of the backpack in the up-and-down directions, and the reciprocating movement distance of the backpack on the guide rail is long, so that the strength requirement on the guide rail is extremely high, the precision is difficult to control, the friction force and the noise are large, the whole weight is also large, the mechanism is complex, multiple positions are connected by lines, the installation is complex, and faults are easy to occur.

Disclosure of Invention

According to the problems, the invention discloses a backpack which is used for solving the problem of impact body feeling caused by the change of the acceleration of the backpack during the weight-bearing movement of a user and also solving the problems that the existing weight-reducing backpack is heavy, the strength requirement of a transmission structure on each part is too high, the weight-reducing effect is not good or is not easy to realize, the quality is poor and the like.

In some embodiments of the invention, the load-reducing transmission system of the load-reducing backpack is improved, the existing load-reducing backpack adopts guide rails arranged on two sides, elastic devices are directly connected or a load and elastic device are connected through various pulleys and steel wire ropes to design a load-reducing mechanism, the transmission effect is not good and the connection reliability is poor, but the application adopts the concentric gear and the rack which are integrally processed and formed as the transmission structure, the force storage structure is arranged as a spring with larger elastic coefficient, in the process that the backpack body moves up and down relative to the back of a human body, the concentric speed change gears utilize the principle of wheel shafts, so that the tiny movement of the backpack body can excite the force accumulation process of the spring, the load reduction effect is better, and the friction among all working parts in a gear transmission mode is small, the use noise and the use smoothness are good, and the effect of storing power and reducing load is better achieved.

In some embodiments of the present invention, an auxiliary transmission structure for reducing the load of a load-reducing backpack is improved, in which the backpack further includes a sliding auxiliary system and a limiting auxiliary system in addition to the above-mentioned main working components for energy storage and reduction, the sliding auxiliary system is used for limiting the relative movement of the backpack plate and the back plate along the matching direction of the limiting auxiliary system, and the limiting auxiliary system is used for supporting the sliding gap between the backpack plate and the back plate so that the backpack plate and the back plate are not blocked when the relative sliding occurs.

The invention relates to a sliding auxiliary system, in particular to a sliding auxiliary system which is arranged in a pulley guide rail transmission mode and reduces the friction of relative displacement of a backpack plate and a backboard.

The first pulley block is provided with three-way dislocation wheels, meanwhile, the section of the first guide rail is U-shaped, an accommodating part is formed inside the first guide rail, the three-way dislocation wheels are arranged in the accommodating part, and the three-way dislocation wheels are respectively contacted and limited with three inner walls of the first guide rail forming the accommodating part in three directions, so that the sliding stability of the first pulley block on the first guide rail is improved;

the back plate and the backpack plate slide up and down relatively and are supported by a first pulley block in a first guide rail, and three pulleys of the first pulley block are sequentially attached to the front surface, the rear surface and the inner side surface of the guide rail.

The invention relates to a limiting auxiliary system, in particular to a limiting auxiliary system which is set in a pulley guide rail transmission mode, and a pulley is supported between a backpack plate and a back plate, so that on one hand, the friction force of relative sliding between the backpack plate and the back plate can be reduced, and the noise is reduced, on the other hand, the limiting auxiliary system can play a certain limiting role when the backpack plate and the back plate slide and displace relatively, and the backpack plate is prevented from tilting backwards, and after a load is born, the backpack can tilt backwards or the backpack plate deforms, and the back plate and a mounting plate can be extruded to cause sliding friction, so that the backpack plate is propped against the pulley, and once the backpack plate deforms or tilts backwards, the pulley can support the back plate and the backpack plate to perform sliding friction.

In some embodiments of the invention, the matching parameters of the load-reducing transmission system of the load-reducing backpack are improved, the speed-changing gear is composed of a first gear and a second gear with different diameters, so as to realize speed-changing matching, the first gear is meshed with the power rack, the second gear is meshed with the stressed rack, the transmission ratio range of the first gear and the second gear is 3: 1 to 5: 1, the number of the first gear teeth is more than 24, the number of the second gear teeth is more than 12, the gear modulus range of the first gear and the second gear is 1 to 2, the modulus specification of the loaded stressed rack of the power rack is the same as the modulus specification range of the first gear teeth, the assembly clearance range of the power rack, the stressed rack and the first gear is 0.1mm to 0.3mm, the specific value of the matching parameters of the gears is a range value determined by testing personnel through testing each parameter, and the above parameter values are adopted, the knapsack is satisfying the transmission and subtracting the burden effect at the in-process of using, reduces noise at utmost.

Based on the improvement, the application discloses a knapsack, including the knapsack body that is used for carrying the load, with the backplate of human back contact, set up the baldric on the backplate, the knapsack still includes knapsack board and mounting panel, knapsack body fixed mounting is on the knapsack board, and mounting panel slidable ground connects in the backplate, and is provided with transmission system and energy storage equipment on the mounting panel.

The transmission systems are symmetrically arranged on two sides of the back plate, each transmission system comprises a stressed rack, a power rack and a speed change gear, the stressed racks are arranged on two sides of the mounting plate, the power racks are fixedly connected to the back plate, the speed change gear is rotatably arranged on the back plate and is respectively meshed with the power racks and the stressed racks, one end of the energy storage device is fixedly connected to the back plate, and the other end of the energy storage device is fixedly connected to the mounting plate;

the backpack further comprises a sliding assist system and a spacing assist system.

In some embodiments of the invention, the sliding assistance system comprises a first rail and a first set of pulleys;

the first guide rails are fixedly arranged on two sides of the backpack plate, the power rack is arranged on one side surface of the first guide rails, the first pulley block comprises a plurality of pulleys, and the rotating axis of the first pulley block is fixedly arranged on two sides of the backboard;

the first pulley block is in sliding limit fit with the first guide rail, so that the back plate can relatively and limitedly slide along the guide direction of the first guide rail relative to the backpack plate.

The bottom of the first guide rail is provided with a guide rail fixing module and a damping buffering module.

The guide rail fixing module is used for fixedly installing the first guide rail on the backpack plate, and the damping buffering module is used for reducing rigid collision between the backboard and the backpack plate when the backboard is limited relative to the movement of the backpack plate.

The sliding auxiliary system further comprises second guide rails arranged at the left end and the right end of the back plate respectively, guide portions are fixedly connected to the mounting plate opposite to the second guide rails, and the second guide rails are slidably sleeved with the guide portions.

In one embodiment of the present invention, the transmission gear is fixedly mounted to the gear accommodating portion on the back plate, the gear accommodating portion cover is used for closing the gear accommodating portion, and the transmission gear is rotatably mounted inside the gear accommodating portion.

In an embodiment of the invention, the energy storage device includes a plurality of springs, the mounting plate is provided with a plurality of guide grooves, the guide grooves are arranged corresponding to the springs, the guide grooves are provided with slidable spring terminals, the spring terminals are provided with hooks, the spring terminals are fixedly connected with one ends of the springs, and the other ends of the springs are fixedly connected with the back plate.

An adjusting device is fixed on the spring terminal and used for adjusting the pretightening force of the spring.

The change gear is provided with a plurality ofly, and a plurality of change gear is in proper order arrayed along power rack advancing direction.

The invention has the beneficial effects that:

the movement process of a user is conducted into the mounting plate, and the acceleration of the load backpack is reduced or eliminated through the force storage characteristic of the spring in the energy storage device, so that the impact force generated during acceleration movement of the backpack and the extra work of a human body to overcome the gravity are reduced or even eliminated, and the burden reduction function of the backpack is realized;

meanwhile, the transmission system is arranged in a mode that the gear teeth and the rack are mutually clamped, so that the stability of motion conduction is improved, the interaction force among all parts is reduced, and the service life of the backpack is prolonged;

the sliding auxiliary system has the effects of limiting the relative movement of the backpack plate and the back plate along the matching direction of the limiting auxiliary system, reducing the friction of the relative displacement of the backpack plate and the back plate and improving the movement stability of the backpack plate and the back plate;

the limiting auxiliary system is supported between the back plates of the backpack plates, so that on one hand, the friction force of relative sliding between the backpack plates and the back plates can be reduced, and the noise is reduced, and on the other hand, the limiting auxiliary system can also play a certain limiting role when the backpack plates and the back plates are in relative sliding displacement, so that the backpack plates are prevented from being deformed or tilted backwards when the load of the backpack body is large;

the parameter values of the speed change gear, the power rack and the stressed rack are readjusted, so that the backpack meets the transmission load reduction effect and reduces the working noise to the maximum extent in the using process.

Drawings

FIG. 1 is an exploded view of a backpack according to an embodiment of the present invention;

FIG. 2 is an exploded view of a backpack according to an embodiment of the present invention;

FIG. 3 is a schematic view of an internal structure of a backpack according to an embodiment of the present invention;

FIG. 4 is a schematic view of an internal structure of a backpack according to an embodiment of the present invention;

FIG. 5 is a schematic view of an internal structure of a backpack according to an embodiment of the present invention;

FIG. 6 is a schematic view of an internal structure of a backpack according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a transmission system of a backpack according to an embodiment of the present invention.

Description of reference numerals:

110. a backpack body; 120. a backpack plate; 130. a back plate; 131. shoulder straps; 140. mounting a plate; 200. a transmission system; 210. a speed change gear; 211. a first gear; 212. a second gear; 221. a stressed rack; 222. a power rack; 231. a gear housing portion; 232. a gear accommodating portion cover; 300. an energy storage device; 310. a spring; 321. a guide groove; 322. a spring terminal; 330. an adjustment device; 400. a sliding assistance system; 410. a first guide rail; 411. a guide rail fixing module; 412. a damping buffer module; 420. a first pulley block; 430. a second guide rail; 440. a guide section; 500. a limit auxiliary system; 510. a second pulley block.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The following is a description of preferred embodiments of the present application in conjunction with figures 1-7.

A backpack as shown in fig. 1 and 2 includes a backpack body 110 for carrying a load, a back plate 130 contacting the back of a human body, and shoulder straps 131 provided on the back plate 130.

The backpack also includes a backpack plate 120 and a mounting plate 140;

the backpack body 110 is fixedly installed on the backpack plate 120, the mounting plate 140 is slidably connected to the back plate 130, and the mounting plate 140 is provided with a transmission system 200 and an energy storage device 300;

the transmission systems 200 are arranged at two sides of the back plate 130, and each transmission system 200 comprises a force rack 221, a power rack 222 and a speed change gear 210;

the stressed racks 221 are arranged on two sides of the mounting plate 140, and the power racks 222 are fixedly connected to the backpack plate 120;

the change gear 210 is rotatably mounted on the back plate 130, and the change gear 210 is respectively meshed with the power rack 222 and the force rack 221;

one end of the energy storage device 300 is fixedly connected to the back plate 130, and the other end of the energy storage device 300 is fixedly connected to the mounting plate 140;

the sliding auxiliary system 400, the sliding auxiliary system 400 is fixedly connected with the backpack plate 120 and the back plate 130 respectively, and the backpack plate 120 and the back plate 130 relatively move along the limited matching direction of the sliding auxiliary system 400;

the auxiliary limit system 500, the auxiliary limit system 500 is fixedly installed on the mounting plate 140, and the auxiliary limit system 500 is used for supporting the sliding gap between the backpack plate 120 and the backboard 130.

It should be noted that, the working principle of the above burden-reducing backpack is as follows:

under the ideal condition of not considering the friction force and the air resistance, when the human body is in a static state when carrying the backpack of the present invention, the backpack body 110, the transmission system 200, the human body and the back plate 130 are in a balanced state.

When a person walks, the backpack can move in various directions such as up, down, left and right directions along with the activities of the shoulders, the back, the buttocks and the like of the human body, wherein the acceleration force generated by the up-and-down fluctuation activities when the backpack is started and stopped and the activity direction is changed can generate additional periodic load to the human body except the self weight of the backpack, and the load can be higher than three times or even higher than the actual load of the backpack sometimes, so that the backpack can cause more compression to the shoulders and the spine of the human body.

When the human body starts to move upwards from a static state, the back plate 130 directly contacted with the human body synchronously moves upwards, the backpack body 110 still keeps the original position under the action of inertia, but the backpack body 110 moves downwards relative to the back plate 130, so that the change gear 210 fixed on the back plate 130 starts to rotate under the drive of the power rack 222, and the force rack 221 meshed with the small wheel of the change gear 210 is driven to move at a set speed change ratio, so that the energy storage device 300 connected with the bottom stores the force.

The energy storage device 300 is exemplified by the elastic energy storage method commonly used in the conventional load-reducing backpack, and the additional elastic force generated during the deformation of the energy storage device 300 is just equal to the acting force when the gravity of the backpack body 110 is overcome and the backpack body 110 moves upward relative to the ground, but is not enough to overcome the gravity of the backpack body 110, so that the backpack body 110 and the ground are still in a relatively static state. When the human body starts to move downwards as the direction is changed, the back plate 130 also moves downwards, and at this time, the backpack body 110 moves upwards relative to the back plate 130, and the energy storage device 300 loses the energy storage condition, and starts to continuously release the stored force, and drives the speed change gear 210 to rotate reversely, so that the extra elastic force stored by the energy storage device 300 is transmitted to the power rack 222, and during this period, the extra elastic force released by the energy storage device 300 enables the backpack body 110 to just overcome the self gravity and not move downwards relative to the ground. During the accumulation and release of the accumulated force by the energy accumulating means 300, the position of the backpack body 110 is kept relatively still with respect to the ground at all times, thereby achieving a visual suspension effect.

In the above description, the stored force of the energy storage means 300 actually comes from the work done when the human body moves upward, but due to the linear power storage characteristic of the energy storage means 300, the work done when the human body moves upward against the backpack gravity is gently stored; when the energy storage device 300 releases the stored force, the force is still released in a relatively gentle linear form, so that the human body feels relieved; during the period of storing and releasing the stored force, the backpack body 110 is always in a static state relative to the ground, so that the human body does not feel the impact when the backpack body 11O overcomes the gravity rise and the free fall at all, but only feels the gentle deformation of the energy storage device 300.

It is further understood that the above-described transmission system 200 functions as: the additional acting force and the huge impact force generated instantly when the backpack body 110 is started or stopped or the direction is converted into the continuous small and gentle acting force when the elastic component is deformed are converted into the upward and downward acceleration movement, so that the burden reduction effect on the body feeling is realized.

Besides, the main working components for energy storage and reduction such as the transmission system 200 and the energy storage device 300 described above further include a sliding auxiliary system 400 and a limiting auxiliary system 500, the sliding auxiliary system 400 is used for limiting the relative movement between the backpack plate 120 and the back plate 130 along the matching direction of the limiting auxiliary system 500, the limiting auxiliary system 500 is used for supporting the sliding gap between the backpack plate 120 and the back plate 130, on one hand, the friction force of the relative sliding between the backpack plate 120 and the back plate 130 can be reduced, and the noise is reduced, on the other hand, the limiting auxiliary system 500 can also play a certain limiting role when the backpack plate 120 and the back plate 130 are in relative sliding displacement, and the backpack plate 120 is prevented from tilting backwards.

In one embodiment of the present invention, as shown in fig. 5 to 7, the speed change gear 210 is composed of a first gear 211 and a second gear 212 having different diameters, the first gear 211 has a diameter larger than that of the second gear 212, and the first gear 211 and the second gear 212 are coaxial and integrally formed.

The first gear 211 is engaged with the power rack 222, and the second gear 212 is engaged with the force rack 221.

Based on the structure of the transmission gear 210, in an embodiment of the present invention, as shown in fig. 3 and 5, the transmission gear 210 is fixedly mounted on the gear accommodating portion 231 on the back plate 130, and the gear accommodating portion 231 covers the gear accommodating portion 231 to rotatably mount the gear accommodating portion 231 inside the gear accommodating portion 231 to enclose the speed gear 210.

The gear receiving portion 231 serves to form a space for mounting the transmission gear 210 on the back plate 130 and to close the space, so that the mounting stability of the transmission gear 210 is improved, and the transmission gear 210 is prevented from being damaged due to direct contact of other external objects with the transmission gear 210, thereby prolonging the service life of the transmission gear 210.

It should be noted that, in the above description, as shown in fig. 3-7, the function of the speed-changing gear 210 is to change the direction of the gravity of the backpack body 110 acting on the spring 310 and amplify the relative movement between the backpack body 110 and the human body, so that the very slight up-and-down movement of the human body can also deform the spring 310 to accumulate the force through speed change, and thus any frequency and amplitude movement of the human body can always deform the spring 310 to accumulate the force and release the accumulated force within a certain range of frequency.

The specific role of the change gear 210 in the process of carrying out the load relieving work of the backpack is as follows:

the transmission gear 210 is composed of a first gear 211 and a second gear 212 with different diameters, and the diameter of the first gear 211 is larger than that of the second gear 212, when the backpack body 110 and the backpack plate 120 for fixing the backpack move relative to the back plate 130, the power rack 222 arranged at both sides of the backpack plate 120 drives the first gear 211 to rotate, and the second gear 212 rotates with the first gear 211 to drive the force rack 221 to move, at this time, the transmission gear 210 can be abstractly regarded as a lever, the first gear 211 is used as a force application part, the second gear 212 is used as a force application part, and the central axis of the transmission gear 210 is used as a fulcrum of the lever, and since the diameter of the first gear 211 is larger than that of the second gear 212, that is, the transmission gear 210 is a labor-saving lever with the length of the force application part longer than that of the force application part, the design has the beneficial effects of, on one hand, amplifying the relative movement of the backpack body 110 and the human body, the spring 310 can also deform to accumulate force by changing the speed when the human body moves up and down very slightly, so that the sensitivity of the spring 310 to respond to the change of the movement state of the backpack body 110 is improved, on the other hand, for the selection of the spring 310, the spring 310 with a larger elastic coefficient can be selected as the energy storage device 300, the larger the elastic coefficient of the spring 310 is, the smaller the deformation amount is, the occupied space of the accommodating part of the spring 310 can be reduced sufficiently, and the space utilization rate of the back plate 130 is improved.

In one embodiment of the present invention, as shown in fig. 6 and 7, the energy storage device 300 includes a plurality of springs 310.

The mounting plate 140 has a plurality of guide slots 321, the guide slots 321 are disposed corresponding to the springs 310, slidable spring terminals 322 are disposed on the guide slots 321, hooks are disposed on the spring terminals 322, and the spring terminals 322 are fixedly connected to one ends of the springs 310.

The other end of the spring 310 is fixedly connected to the back plate 130.

Among them, the guide groove 321 portion may also be provided as a spring 310 accommodating portion and a spring 310 accommodating portion cover for closing the spring 310 case.

Two ends of the spring 310 are respectively connected to the spring 310 accommodating part and the mounting plate 140, so as to realize the elastic connection between the backpack body 110 and the transmission system 200 and the back plate 130.

The effect of adjusting the elastic force is achieved by increasing or decreasing the number of the springs 310 or changing the fixing position of the springs 310 on the elastic force adjusting device 330.

Accordingly, the present invention is extremely important to the amount of deformation and the elastic coefficient of the spring 310.

It should be noted that, under the condition of the same force, the larger the elastic coefficient of the spring 310, the smaller the deformation amount of the spring 310, and the shorter the change stroke of the spring 310, therefore, the shorter the time for the spring 310 to return to the initial state, and correspondingly, the smaller the kinetic energy and inertia of the spring 310, the design scheme effectively avoids the inertia generated by the large-amplitude trembling of the spring 310, and simultaneously avoids the resonance phenomenon generated when the vertical vibration frequency of the backpack body 110 is the same as the vertical movement frequency of the human body with respect to the vertical movement frequency of the back plate 130.

In order to avoid the phenomenon that the change of the human motion frequency and amplitude is too large, the deformation degree of the elastic component is too large, so that the deformation frequency is superposed with the frequency of the human motion to cause resonance, the deformation stroke is smaller while the elastic coefficient of the spring 310 is greatly increased, the deformation frequency of the spring 310 is stabilized within a certain range, and meanwhile, the instant inertia of the deformation conversion of the spring 310 can be greatly reduced, so that the burden reduction effect is further achieved.

Preferably, the backpack body 110 and the back plate 130 are in proper relative positions in a static state in order to meet different load requirements of the backpack body 110 and under load.

Based on the above description, in an embodiment of the present invention, as shown in fig. 6 and fig. 7, an adjusting device 330 is fixed on the spring terminal 322, and the adjusting device 330 is used for adjusting the pre-tightening force of the spring 310.

It should be noted that the energy storage device 300 of the present invention further includes an elastic force adjusting device 330 for adjusting the elastic coefficient of the spring 310, which mainly adjusts the fixing position of the spring 310 and the back plate 130 and the number of the springs 310 in effective connection, so as to adjust the initial elastic coefficient of the spring 310 and the initial relative position of the backpack body 110 and the back plate 130 in the stationary state when the backpack is loaded.

The backpack body 110 is kept as static as possible with the ground through the transmission system 200, the spring 310 of the energy storage device 300 is stretched and contracted along with the change of the gravity center when a human body walks or runs, when the backpack body 110 moves relative to the back plate 130, taking the backpack body 110 moving downward relative to the back plate 130 as an example, as shown in fig. 5, the backpack body 110 drives the power rack 222 on the plate to move downward, the power rack 222 is meshed with the speed change gear 210 to drive the speed change gear 210 to rotate, specifically, the speed change gear 210 on the left side rotates counterclockwise, the speed change gear 210 on the right side rotates clockwise, meanwhile, as the speed change gear 210 is meshed with the force bearing rack 221, the speed change gears 210 on the left side and the right side drive the mounting plate 140 to move upward, the spring 310 extends, and the backpack body 110 moves to do work and is stored. The final effect is that when the back plate 130 moves up and down together with the human body, the acceleration force generated when the backpack moves up and down is converted into the deformation force of the spring 310 through the speed change gear 210 and the energy storage device 300, and then the backpack body 110 is maintained in a state of being relatively static to the ground through the elastic deformation force, so that the gravity acceleration force of the load-bearing backpack becomes gentle and even eliminated, and the spine of the human body is better protected. Because the backpack body 110 is still relative to the ground, the load is prevented from moving up and down along with the human body, and the inertia force impacts the human body to make the human body feel tired.

In one embodiment of the present invention, as shown in fig. 3-7, the sliding assistance system 400 includes a first rail 410 and a first set of pulleys 420.

The first guide rail 410 is fixedly installed at both sides of the backpack plate 120, and the power rack 222 is disposed at one side surface of the first guide rail 410.

The first pulley block 420 comprises a plurality of pulleys, and the rotation axis of the first pulley block 420 is fixedly installed at both sides of the back plate 130.

The first pulley block 420 is in sliding limit fit with the first guide rail 410, so that the backboard 130 slides relatively to the first guide rail 410 along the guiding direction of the first guide rail 410 in a limit manner relative to the backpack board 120.

It should be noted that, because the first pulley block 420 is installed in the first guide rail 410 and can slide along the first guide rail 410, when the first pulley block 420 slides to the end of the first guide rail 410, that is, the backpack plate 120 and the back plate 130 reach the maximum limit position, the first pulley block 420 is collided by the blocking part at the end of the first guide rail 410, the impact force generated by the collision will be transmitted to the back of the user through the back plate 130, and such an impact will be generated continuously with the walking of the user, causing a certain damage to the shoulders, the spine and the waist of the user.

Based on the above description, in order to avoid the above situation, in an embodiment of the present invention, as shown in fig. 6, a rail fixing module 411 and a damping module 412 are disposed at the bottom of the first rail 410.

The rail fixing module 411 is used to fixedly mount the first rail 410 on the backpack board 120.

The damping and buffering module 412 is used for reducing the hard collision between the backboard and the backpack board when the movement of the backboard relative to the backpack board reaches a limit.

When the backpack plate 120 and the back plate 130 reach the maximum limit position, the first pulley block 420 contacts the damping buffer module 412 first, the damping buffer module 412 moves along the same direction of the first pulley block 420, the impact force is removed, and the damping buffer module 412 deforms along with the movement of the first pulley block 420 and the damping buffer module 412 because the damping buffer module 412 has better elasticity, so that the kinetic energy of the first pulley block 420 is converted into the elastic potential energy of the damping buffer module 412, and the impact of the guide piece on the first guide rail 410 is reduced.

Preferably, the damping buffer module 412 is made of a rubber material with impact resistance and good toughness, and when the bottom of the first guide rail 410 contacts with the first pulley block 420 for impact, the first pulley block 420 is protected, the first pulley block 420 is prevented from colliding, and the impact force is buffered.

It should be further noted that, in the above embodiment of the sliding assistance system 400 of the present invention, the sliding assistance system 400 is configured as a pulley-rail transmission form to reduce friction of relative displacement between the backpack plate 120 and the back plate 130, specifically, the first rail 410 is fixedly installed on two sides of the backpack plate 120, the power rack 222 is disposed on one side surface of the first rail 410, the first pulley block 420 includes a plurality of pulleys, a rotation axis of the first pulley block 420 is fixedly installed on two sides of the back plate 130, and the first pulley block 420 is in sliding position-limiting fit with the first rail 410, so that the back plate 130 slides in a position-limiting manner relative to the backpack plate 120 along the guiding direction of the first rail 410.

Preferably, the first pulley block 420 is provided as a three-way staggered wheel, and meanwhile, the cross section of the first guide rail 410 is U-shaped, and a receiving portion is formed inside the first guide rail, the three-way staggered wheel is provided in the receiving portion, and the three-way staggered wheel is respectively contacted and limited with three inner walls of the first guide rail 410 forming the receiving portion in three directions, so that the sliding stability of the first pulley block 420 on the first guide rail 410 is improved.

In one embodiment of the present application, to increase the stability of the pulleys, the first pulley sets 420 have 4 sets, and are symmetrically installed on both sides of the back plate 130.

The back plate 130 and the backpack plate 120 slide up and down relatively and are supported by a first pulley block 420 in the first guide rail 410, and three pulleys of the first pulley block 420 are sequentially attached to the front, rear and inner three surfaces of the guide rail.

Wherein the sliding assistance system 400 further comprises a second guide rail 430 and a guide 440.

The second guide rails 430 are fixedly disposed at two ends of the back plate 130, a guide portion 440 is fixedly connected to the mounting plate 140 at a position opposite to the second guide rails 430, and the guide portion 440 is slidably sleeved on the second guide rails 430.

The auxiliary limit system 500 includes a second pulley block 510, the second pulley block 510 includes a plurality of pulleys, and the rotation axis of the first pulley block 420 is fixedly installed at two sides of the bottom of the mounting plate 140.

One specific embodiment of the auxiliary limit system 500 of the present invention is to set the auxiliary limit system 500 in a pulley rail transmission form, and support the pulley between the back plates 130 of the backpack plates 120, so as to reduce the friction force between the backpack plates 120 and the back plates 130 during relative sliding movement, and reduce noise, on the other hand, the auxiliary limit system 500 can also play a certain limit role during relative sliding movement between the backpack plates 120 and the back plates 130, so as to prevent the backpack plates 120 from tilting backwards, and the backpack will tilt backwards or the backpack plates 120 deform after loading, and will press the back plates 130 and the mounting plates 140 to cause sliding friction, so that the pulley is used to support the backpack plates 120, and once the backpack plates 120 deform or tilt backwards, the pulley will support the back plates 130 and the backpack plates 120 to perform sliding friction.

Based on the above conception, specifically:

the speed-change gears 210 are respectively fixed on the left and right sides of the back plate 130 and are arranged in a left-right symmetrical manner.

Two first guide rails 410 which are arranged in parallel are arranged on the backpack plate 120 and are arranged on the left side and the right side of the backpack plate 120, and the power rack 222 and the first guide rails 410 are processed into a whole.

The power rack 222 is engaged with the first gear 211 of the speed change gear 210.

The first guide rail 410 is a U-shaped guide rail, three sides of the inner side of the guide rail are additionally provided with micro guide rails, the top of the outer side of the guide rail is also provided with micro guide rails, and the back of the outer side of the guide rail is fixed with the power rack 222.

The first guide rail 410 is provided with a first pulley block 420 for movement therein.

The first pulley block 420 is provided as a three-way dislocation wheel, and is contacted and limited with three inner walls of the first guide rail 410 forming the accommodating part in three directions, so that the sliding stability of the first pulley block 420 on the first guide rail 410 is improved.

The three-way dislocation wheel is composed of three U-shaped pulleys with different installation surfaces, and is respectively attached to the front, the rear and the inner side surfaces in the U-shaped groove of the first guide rail 410.

The groove of the U-shaped pulley is clamped with the micro guide rail on the inner side of the first guide rail 410, so that the stability of the unidirectional sliding of the pulley is further improved, and the motion stability of the whole pulley block is improved.

Two second guide rails 430 that are parallel to each other are respectively and fixedly disposed on the left and right sides of the central axis of the back plate 130, a guide portion 440 is disposed on the mounting plate 140 opposite to the second guide rails 430, and the second guide rails 430 are slidably sleeved with the guide portion 440.

The force receiving racks 221 are two in number, are fixedly installed at both sides of the mounting plate 140, and are engaged with the second gear 212 of the speed change gear 210.

The mounting plate 140 is fixedly connected to one end of the spring 310, and the other end of the spring 310 is fixedly connected to the back plate 130.

The back plate 130 is rotatably provided with two second pulley blocks 510, and the auxiliary driving wheels are used for changing the sliding friction between the backpack plate 120 and the back plate 130 after being stressed and deformed into rolling friction.

When the backpack body 110 moves relative to the back plate 130, since the backpack moves in various directions such as up, down, left, and right directions according to the movement of the shoulder, back, hip, etc. of the human body when a person walks, the first guide rail 410, the second guide rail 430, the first pulley block 420, and the auxiliary conventional wheels function to limit the movement of the backpack body 110 and the backpack plate 120 relative to the back plate 130 to a stable up-and-down movement with a low friction force, thereby maximizing the burden reduction effect.

In another embodiment of the present invention, as shown in fig. 3 to 7, the plurality of speed change gears 210 are provided, and the plurality of speed change gears 210 are sequentially arrayed in a traveling direction of the power rack 222.

It should be noted that the number of the speed change gear 210 sets can be increased appropriately according to the size of the backpack and the size of the load, so as to achieve sufficient load bearing capacity and stability.

In one embodiment of the present invention, a locking mechanism is disposed on the top of the back plate 130 for locking the backpack body 110 with respect to the back plate 130.

In the standard mode, the backpack is the same as the common backpack on the market at present, when the user walks, the backpack moves up and down along with the body of the user, and the mode is suitable for the situation that the load in the backpack body 110 is too small, and the load reduction of the transmission system 200 is not needed.

In the above embodiment, the user can select the load reduction mode or the locking mode according to the load condition in the backpack body 110, that is, when the load in the backpack body 110 is too large, the user can select the load reduction mode to perform load reduction by using the transmission system 200, and when the load in the backpack body 110 is too small or there is no load in the backpack body 110, the user can select the locking mode to reduce the backpack body 110 and the shaking caused by the user's movement.

In the practical production and application of the backpack, technicians find that the noise generated by the backpack transmission system 200 in the working process can change along with the change of a series of parameters such as the gear engagement state and the gear transmission ratio of the transmission system 200, so that a tester provides parameters of the transmission system 200 which can reduce the working noise to the maximum extent while meeting the transmission load reduction effect through a large number of tests and simulation verification, and the parameters are specifically as follows:

the ratio of the first gear 211 to the second gear 212 ranges from 3: 1 to 5: 1.

The number of teeth of the first gear 211 is greater than 24, and the number of teeth of the second gear 212 is greater than 12.

The gear module range of the first gear 211 and the second gear 212 is 1 to 2, and the module specification of the power rack 222 and the force rack 221 is the same as the module specification range of the first gear 211.

The assembly clearance range of the power rack 222, the force rack 221 and the first gear 211 is 0.1MM to 0.3 MM.

In conclusion, the invention discloses a backpack, which is used for solving the problem of impact body feeling caused by the change of the up-and-down motion acceleration of the backpack in the process of weight bearing motion of a user and solving the problems that the existing load reducing backpack is heavy in mass, the strength requirement of a transmission structure on each part is too high, the load reducing effect is not good or is not easy to realize, the quality is poor and the like.

The existing load-reducing backpack adopts guide rails arranged on two sides, is directly connected with an elastic device or is connected with a load and the elastic device through various pulleys and steel wire ropes to design a load-reducing mechanism, and has poor transmission effect and poor connection reliability.

The force accumulation characteristic of the spring 310 is mainly utilized, the speed change gear 210 is used for conducting the movement of the backpack and the deformation force accumulation of the spring 310 efficiently, the structure is simple, the installation is convenient, the transmission loss is small, and the friction force and the noise are reduced.

The speed change gear 210 adopts the integrated into one piece's concentric gear and rack as transmission structure, the structure of holding power sets up to the great spring 310 of coefficient of elasticity, at the in-process that knapsack body 110 reciprocated for the human back, concentric speed change gear 210 utilizes the shaft principle, make the tiny removal of knapsack body 110 can arouse the process of holding power of spring 310, the effect of subtracting burden is better, and the frictional force between each working member of gear drive form is less, use noise and use smoothness nature are better, better reach the effect of holding power and subtracting burden.

According to the first concept of the backpack, the movement process of a user is conducted into the mounting plate, and the acceleration of the load backpack is reduced or eliminated through the force storage characteristic of the spring in the energy storage device, so that the impact force generated during acceleration movement of the backpack and the extra work of a human body against gravity are reduced or even eliminated, and the load reduction function of the backpack is realized;

according to the second concept of the backpack, the transmission system is arranged in a manner that the gear teeth and the gear racks are mutually clamped, so that the stability of motion conduction is improved, the interaction force among all parts is reduced, and the service life of the backpack is prolonged;

according to the third concept of the invention, the sliding auxiliary system has the function of limiting the relative movement of the backpack plate and the back plate along the matching direction of the limiting auxiliary system, so that the friction of the relative displacement of the backpack plate and the back plate is reduced, and the movement stability of the backpack plate and the back plate is improved;

according to the fourth concept of the invention, the limit auxiliary system is supported between the back plates of the backpack plate, so that on one hand, the friction force of relative sliding between the backpack plate and the back plate can be reduced, and the noise is reduced, and on the other hand, the limit auxiliary system can play a certain limit role when the backpack plate and the back plate are in relative sliding displacement, so that the backpack plate is prevented from tilting backwards;

the fifth idea of the invention is to readjust the parameter values of the speed change gear, the power rack and the stressed rack, so that the backpack can meet the transmission load reduction effect and reduce the working noise to the maximum extent in the using process.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that a person skilled in the art of mechanical load-reducing backpacks could make several modifications and substitutions without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A backpack comprises a backpack body for carrying a load, a back plate contacting with the back of a human body, and shoulder straps arranged on the back plate;

characterized in that, the knapsack still includes:

the backpack body is fixedly arranged on the backpack plate;

the mounting plate is connected to the back plate in a sliding mode and is provided with a transmission system and an energy storage device;

the transmission systems are arranged on two sides of the back plate, and each transmission system comprises a stressed rack, a power rack and a speed change gear;

the stressed racks are arranged on two sides of the mounting plate, and the power racks are fixedly connected to the backpack plate;

the speed change gear is rotatably arranged on the back plate and is respectively meshed with the power rack and the stressed rack;

one end of the energy storage device is fixedly connected to the back plate, and the other end of the energy storage device is fixedly connected to the mounting plate;

the sliding auxiliary system is respectively and fixedly connected with the backpack plate and the back plate, and the backpack plate and the back plate relatively move along the limited matching direction of the sliding auxiliary system;

the limiting auxiliary system is fixedly arranged on the back plate and is used for supporting a sliding gap between the backpack plate and the back plate.

2. The backpack of claim 1, wherein the transmission gear is composed of a first gear and a second gear having different diameters, and the first gear has a larger diameter than the second gear, and the first gear and the second gear are coaxial and integrally formed;

the first gear is meshed with the power rack, and the second gear is meshed with the stressed rack.

3. The backpack of claim 2, wherein the ratio of the first gear to the second gear ranges between 3: 1 and 5: 1;

the number of the first gear teeth is more than 24, and the number of the second gear teeth is more than 12;

the gear module range of the first gear and the second gear is 1-2, and the module specification of the power rack gear load stressed rack is the same as the module specification range of the first gear;

wherein, the assembly clearance range of the power rack, the stressed rack and the first gear is between 0.1mm and 0.3 mm.

4. The backpack of claim 2, wherein the slide assist system comprises:

the first guide rails are fixedly arranged on two sides of the backpack plate, and the power rack is arranged on one side surface of the first guide rail;

the bottom of the first guide rail is provided with a guide rail fixing module and a damping buffering module;

the first pulley block comprises a plurality of pulleys, and the rotating axes of the first pulley block are fixedly arranged on two sides of the back plate;

the first pulley block is in sliding limit fit with the first guide rail, so that the backboard can relatively and limitedly slide along the guide direction of the first guide rail relative to the backpack board.

5. The backpack of claim 2, wherein the slide assist system further comprises:

the second guide rails are fixedly arranged at two ends of the back plate;

the guide part is fixedly connected to the mounting plate at a position opposite to the second guide rail;

the guide part is slidably sleeved on the second guide rail.

6. The backpack of claim 5, wherein the assembly tolerance of the first set of pulleys and the first rail ranges from minus 0.1mm to minus 0.3 mm.

7. The backpack of claim 5, wherein the restraint assistance system comprises:

the second pulley block comprises a plurality of pulleys, and the rotating axes of the first pulley block are fixedly arranged on two sides of the back plate.

8. The backpack of claim 1, wherein the energy storage device comprises a plurality of springs;

the mounting plate is provided with a plurality of guide grooves, the guide grooves correspond to the springs, slidable spring terminals are arranged on the guide grooves, hooks are arranged on the spring terminals, and the spring terminals are fixedly connected with one ends of the springs;

the other end of the spring is fixedly connected with the back plate.

9. The backpack of claim 8, wherein an adjustment device is secured to the spring terminal for adjusting the pretension of the spring.

10. The backpack of claim 2, wherein the plurality of ratio gears are provided in a sequential array along a direction of travel of the power rack.