CN113693365A

CN113693365A - Folding and unfolding device and backpack

Info

Publication number: CN113693365A
Application number: CN202111009087.5A
Authority: CN
Inventors: 潜亮
Original assignee: Wuhan Jianqiaoshu Business Co ltd
Current assignee: Wuhan Jianqiaoshu Business Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2021-11-26
Also published as: WO2023030410A1

Abstract

The invention relates to the technical field of retraction devices, and discloses a retraction device, which comprises a retraction adjusting part, a retraction adjusting part and a retraction adjusting part, wherein the retraction adjusting part is arranged on the retraction adjusting part; the other end of the connecting piece is used for being connected with an external part to be stored; the connecting piece can be wound or reversely wound around the shaft under the regulation and driving of the retraction and extension regulating part, so that an outer part connected with the connecting piece is driven to move, and retraction and extension regulation is realized; the winding and unwinding device further comprises a stress decomposition mechanism which is provided with at least one winding support structure for winding the connecting piece, and the connecting piece wound around the shaft is connected with an external connecting piece after winding the winding support structure and is used for sharing stress on the connecting piece with the shaft. According to the folding and unfolding device and the backpack with the folding and unfolding device, the stress decomposition mechanism can decompose the traction force of the connecting piece due to the gravity of the backpack, so that the service life of the folding and unfolding device is effectively prolonged, and the folding and unfolding device is particularly applied to adjustable suspended backpacks.

Description

Folding and unfolding device and backpack

Technical Field

The invention relates to the technical field of adjustable folding and unfolding structures, in particular to a folding and unfolding device and a backpack.

Background

The retractable device is a closure device structure and can be used for various articles such as braces, medical devices, shoes, clothes and the like. The device mainly adjusts the external rope, the lace and the like to be collected and released on the rope winding shaft in the device through the internal knob device, and further realizes corresponding collection and release adjustment, so that the effects of tightening and loosening of the shoelace on a use object are reflected, the main structural elements of the device are a wire wheel for winding and a clamping and stopping device connected with the wire wheel, and the rotation operation is converted into the collection and release effects through the linkage of a rotating component.

The design of the winding and unwinding device is mainly applied to shoes, braces and clothes, the structure of the rope on a rope winding shaft has no high requirement on bearing in the winding and unwinding process, and only the tightening force and the clamping force of the corresponding tying belt need to be overcome, wherein the tightening force is the tension force for playing the tightening role of the rope winding, and the clamping force is the loosening caused by further ensuring the tension force of the rope winding and free movement; it is worth noting that the application scenes of shoes, braces, clothes and the like do not generate load requirements on the collecting and releasing device, when the collecting and releasing device is applied to a backpack, the collecting and releasing device and the backpack may need to bear load, the collecting and releasing device structure not only needs to provide certain tensile force, but also needs to bear the traction force of the outer part heavy object, and therefore the collecting and releasing device needs to overcome the tensile force of the outer part heavy object in the adjusting process; furthermore, after the structure of the winding and unwinding device is adjusted, the traction force of the weight of the outer part is always applied, so that the lacing winding part in the structure of the winding and unwinding device is continuously applied with the pulling force, the problem of damage or abrasion is easily caused, and the whole structure of the winding and unwinding device cannot be effectively adjusted.

Disclosure of Invention

In view of one or more of the above drawbacks or needs for improvement in the prior art, the present invention provides a retractable device, which is used to solve the problems of damage and short service life caused by the need of participating in bearing gravity during the use of the conventional retractable device.

In order to achieve the above object, the present invention provides a retracting device, comprising,

a retraction adjusting part;

the other end of the connecting piece is used for being connected with an external part to be stored; and

the connecting piece can be wound or reversely wound around the shaft under the regulation and driving of the retraction adjusting part, so that an outer part connected with the connecting piece is driven to move, and retraction adjustment is realized;

the winding and unwinding device is characterized by further comprising a stress decomposition mechanism, wherein the stress decomposition mechanism is provided with at least one winding support structure for winding the connecting piece, and the connecting piece wound around the shaft is connected with the external connecting piece after winding the winding support structure and is used for sharing stress on the connecting piece with the shaft.

Further, the number of the winding supports is at least two, the first end of the connecting piece which is wound out from the shaft is connected with the outer part after being wound around at least one winding support, and the other end of the connecting piece which is wound out from the shaft is connected with the outer part after being wound around another at least one winding support.

Further, the direction of the traction force formed between the winding support structure and the winding shaft due to the connection of the connecting piece is a second direction, the direction of the pressure borne by the winding shaft due to the gravity of the outer part connected with the connecting piece is a first direction, and the included angle between the second direction and the first direction ranges from 1 degree to 179 degrees.

Furthermore, the traction direction formed by the connection of the connecting pieces between the winding branch structures is a third direction, and the included angle range between the third direction and the first direction is 1-179 degrees.

Further, the included angle between the second direction and the first direction ranges from 120 degrees to 150 degrees.

Further, the number of the winding branch structures is two.

Furthermore, the folding and unfolding device is used for being installed with a backpack, and the winding support structures are directly distributed and installed on the backpack.

Further, the winding and unwinding device further comprises an installation part mechanism, the installation part mechanism is used for being installed with the backpack, and all or part of the winding branch structures are distributed on the installation part mechanism.

Further, the mounting position of the retraction device and the backpack comprises a back plate of the backpack and/or a shoulder strap of the backpack.

Further, the mounting position of the mounting mechanism and the backpack comprises a back plate of the backpack and/or a shoulder strap of the backpack.

Further, the shaft is arranged at the middle lower part of the backpack back plate, and the at least two winding support structures are distributed on the backpack back plate around the shaft.

Further, the two winding support structures are arranged at the middle lower part of the backpack back plate around the shaft, an outer part is connected after the first end of the connecting piece wound out from the shaft winds around one winding support structure, an outer part is connected after the other end of the connecting piece wound out from the shaft winds around the other winding support structure, and the included angle between the second direction and the first direction is preferably in the range of 120-150 degrees.

Further, the winding support structures are arranged in the middle of the mounting part mechanism around the shaft, and the at least two winding support structures are distributed on the mounting part mechanism around the shaft.

Further, the shaft is arranged in the middle of the mounting part mechanism, the number of the winding support structures is two, an outer part is connected after the first end of the connecting piece wound out from the shaft winds around one winding support structure, an outer part is connected after the other end of the connecting piece wound out from the shaft winds around the other winding support structure, and the included angle between the second direction and the first direction is preferably in the range of 120-150 degrees.

Further, the winding branch structure is provided with the connecting piece through groove or is a block-shaped structure with a winding connecting piece limiting space, and winding is formed in this way.

Further, the winding and unwinding device comprises a bearing part around the shaft, the winding support structure comprises a plurality of stand columns, the stand columns are distributed on the bearing part, one end of each stand column is fixedly connected with the bearing part, and the other end of each stand column axially extends around the shaft.

Furthermore, a plurality of stand deviates from the tip that holds carrier is equipped with the drum of keeping off, and be equipped with on the stand and be used for the orderly winding groove of connecting piece.

Further, the number of the upright columns is preferably two, and the included angle between the tangential direction of the connecting piece between the upright columns and the shaft and the traction stress direction is preferably 120-150 degrees.

Further, the winding support structure comprises a support ring, the support ring is sleeved on the shaft, a gap is reserved between the support ring and the shaft, and at least one first through hole for a connecting piece to pass through is formed in the support ring.

Furthermore, one side of the support ring, which deviates from the shaft, is also provided with a lead wire support, and the lead wire support is used for drawing the connecting piece penetrating through the first through hole.

Further, one side of the support ring, which is far away from the shaft, is also provided with a lead cylinder.

Furthermore, at least one first steering component for changing the traction direction of the connecting component is arranged in the lead cylinder.

Furthermore, the support ring is provided with an end cover structure with one end closed and deviating from the bearing piece, and the first through hole is formed in the circumferential side wall of the support ring or in the end cover structure.

Further, the winding and unwinding device comprises a bearing part which is wound around a shaft and is provided with a containing shell which is used for bearing the bearing part, the winding branch structure penetrates through the containing shell, one end of the winding branch structure is provided with a penetrating part of the connecting piece, and the other end of the winding branch structure is a fixing part and is used for being fixed with a backpack or an installing mechanism which is installed on the backpack.

Further, the number of the winding branch structures is preferably two, and the included angle between the second direction and the first direction is preferably in the range of 120-150 °.

Further, the folding and unfolding device is mounted on the back face of the backpack or the upper shoulder belt.

Further, the connecting piece is a non-elastic rope, an elastic rope, or a combination of the non-elastic rope and the elastic rope.

Further, the connecting piece and the part wound around the shaft are non-elastic ropes, and the connecting part with the outer part is an elastic rope.

Further, the outer part comprises a resilient arrangement.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

(1) according to the retracting device realized by the invention, firstly, the problem of the modified arrangement of the retracting device applied by combining bearing stress is solved; and the core of the problem is provided, when being applied to the backpack field of the load, especially to the backpack application field of the variable suspension, the winding and unwinding device needs to participate in the bearing, and the bearing is mainly embodied in the stress caused by the winding on the winding shaft in the winding and unwinding device, secondly, depending on the installation relationship between the winding and unwinding device and the bag body, the application of the bearing force on the winding shaft of the winding and unwinding device can obviously reduce the service life of the winding and unwinding device, the invention provides a solution method for sharing the bearing force applied on the winding shaft on the basis of finding the technical problems, the core is to decompose the force applied on the winding shaft, so that the force applied on the winding shaft can be shared by other auxiliary devices, the winding effect of the winding shaft is not influenced as much as possible, and the improvement of the structure of the winding shaft can be realized on a specific implementation means, or about the axis itself, and the like, thereby solving the above-described problems.

(2) According to the winding and unwinding device, the stand column is arranged on the bearing piece, and the wire blocking disc and the wire leading groove structure are arranged on the stand column, so that the connecting piece led out from the shaft can be orderly wound on the stand column, the wire blocking disc can be effectively prevented from falling off from the stand column in the winding process, the wire leading groove can effectively distribute the traction force on the connecting piece to the whole stand column, and the stand column can bear the tension force of the connecting piece and simultaneously does not influence the operation of the whole winding and unwinding device.

(3) According to the winding and unwinding device, the support ring structure is arranged on the bearing piece, the lead support or the lead cylinder is arranged on the support ring, and the traction force of the connecting piece is uniformly distributed on the whole bearing piece through the support ring, so that the whole winding and unwinding device is stressed together when being subjected to the tension instead of being stressed independently around the shaft structure, and the bearing capacity of the winding and unwinding device is greatly improved.

(4) The winding and unwinding device provided by the invention has the advantages that the lead cylinder or the protective belt structure is arranged, the connecting piece led out from the adjusting part is pulled to the external structure, and the connecting piece is protected through the lead cylinder or the protective belt structure, so that the problem that the winding and unwinding device cannot be wound and unwound due to the fact that the connecting piece is abraded or broken in the use process of the winding and unwinding device is avoided.

(5) The included angle of the range of the commonly born force of the winding and unwinding device is preferably set to be 120-150 degrees, so that the winding and unwinding device obtains the best stress decomposition effect in the process of drawing the connecting piece, the damage of the winding and unwinding device to the winding and unwinding structure is reduced in the process of sharing the traction force on the connecting piece to the winding and unwinding structure, and the service life of the winding and unwinding device is prolonged.

(6) According to the invention, the retractable device can be matched with an external fixed mounting device for use, so that the force applied to the shaft can be further decomposed through the matching of the retractable device and the fixed mounting device, wherein a plurality of supporting points can be arranged on the fixed mounting device, so that the force acting on the retractable device can be born and born by the supporting points.

(7) The folding and unfolding device realized according to the invention is particularly suitable for backpacks with variable suspension concept arrangement, the backpack can reduce the buffer of the load in an elastic way by combining the adjustability and the suspension, and in the improvement of the adjustable backpack, the folding and unfolding device is arranged on the back surface of the backpack or arranged at the shoulder strap to be an adjustable way with better experience, particularly, the adjusting mechanism is arranged on the backpack body, and the shoulder strap of the backpack is correspondingly connected and provided with the telescopic adjusting piece, so that the user can adjust the length of the shoulder strap and the gravity center of the backpack according to the situation to ensure the best comfort level of the backpack. But the collecting and releasing device is required to bear the load impact of the whole backpack on the whole, and by using the collecting and releasing device designed by the technical concept of the invention, the tension of the whole backpack on the connecting piece can be decomposed or transferred by the adjusting mechanism and the force decomposing mechanism, so that the damage probability of the backpack in the using process around the shaft can be reduced, and the service life of the backpack is effectively prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the retracting device according to the embodiment of the present invention;

FIG. 2 is a schematic structural diagram of one embodiment of a retraction device in an embodiment of the present invention;

FIG. 3 is a schematic view of the structure at the A-A plane of FIG. 2;

FIG. 4 is a schematic structural diagram of one embodiment of a retraction device in an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of one embodiment of a retraction device in accordance with an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of one embodiment of a retraction device in accordance with an embodiment of the present invention;

FIG. 7 is a schematic illustration of the traction forces in the retraction device in an embodiment of the present invention;

FIG. 8 is a schematic structural view of a stress plate according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of one embodiment of a backpack according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of one embodiment of a backpack according to an embodiment of the present invention;

figure 11 is a schematic structural view of one embodiment of a backpack according to embodiments of the present invention.

In all the figures, the same reference numerals denote the same features, in particular:

1. a base; 2. a shaft; 3. a disc; 4. a hauling rope; 5. a column; 6. a wire blocking disc; 7. a lead slot; 8. a support ring; 9. a first through hole; 10. an end cap; 11. a lead wire holder; 12. a lead drum; 13. a first steering member; 14. a second steering member; 15. a stress plate; 16. a protective band; 17. a backpack.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, 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" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

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

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

Example (b):

referring to fig. 9, 10 and 11, the backpack 17 according to the preferred embodiment of the present invention includes a backpack 17 body and two shoulder straps disposed on the back panel of the backpack 17. In the present application, the "back plate" of the backpack 17 refers to a side of the backpack 17 that contacts a human body when being worn.

The retraction device in the preferred embodiment of the invention comprises an adjusting part for retraction operation, a connecting piece for connecting the retraction device with an external part, a shaft 2 for winding the connecting piece and realizing the external length change of the connecting piece, a conversion mechanism for realizing the transmission between the adjusting part and the shaft 2, receiving the operation of the adjusting part and driving the shaft 2 to rotate and adjusting the length change of the connecting piece; furthermore, the retraction device further comprises a stress decomposition mechanism, wherein the stress decomposition mechanism comprises at least one winding branch structure of the connecting piece, and a winding support surface is formed between the winding branch structure and the connecting piece and is used for bearing pressure under the action of force in the traction stress direction of the connecting piece so as to bear the force applied to the shaft 2 by the connecting piece.

The traditional folding and unfolding device is mainly applied to shoes, the folding and unfolding device is arranged at a shoelace tightening point, namely a shoe tongue, the shoelace length is adjusted through the tightening and the loosening of the folding and unfolding device, and then the whole shoes are tightened and loosened. In the application process, the winding and unwinding device is not interfered and restrained by other forces, and the shoelace and the winding and unwinding device are connected into an integral structure, namely, the shoelace extends out from one end of the winding and unwinding device and enters from the other port after being wound by the shoelace holes in a crossed manner, and the shoelace and the winding and unwinding device form a closed loop structure and cannot be additionally pulled by external force.

In the process of transferring the retractable device on the shoe to the backpack 17, the retractable device is arranged at the tail end of the shoulder strap of the backpack 17, and the retractable device is used for retracting the shoulder strap to adjust the length of the shoulder strap of the backpack 17, so that the comfort of a user for carrying the backpack 17 is improved. However, in the process of adjusting the existing backpack 17 by using the retracting and releasing device, the retracting and releasing device is fixed on the backpack 17, and the entire backpack 17 can be driven to adjust when the retracting and releasing function is executed, so that the actual traction load of the retracting and releasing device is the weight of the entire backpack 17, and particularly, under the condition that the weight of the backpack 17 of the student group is greatly increased at present, the tensile load of the retracting and releasing device around the shaft 2 for executing the winding operation in the retracting and releasing device is quite large, which also causes the retracting and releasing device in the existing backpack 17 to be extremely easy to damage in the stretching process, and the retractable adjustment of the backpack 17 is also not easy to control due to the existence of the load, thereby greatly increasing the adjustment difficulty of the shoulder straps of the backpack 17.

In particular, the adjustment part is preferably a prior art structure, which is typically provided with a housing part, a tensioning member, a spool part, a tightening part and a connecting part, corresponding to the adjustment part, the connecting part, the shaft 2 and the transformation means, respectively, in the preamble of the present application. The housing component internally comprises a containing area, the spool component is rotationally positioned in the containing area, and the tightening component is used for being axially positioned above the spool component and rotating the spool component in the containing area, so that the rotary winding of the tightening component on the spool component is realized, and the telescopic adjustment of the telescopic structure is realized. The above structure is a mature technology, which is not described in detail herein, and the specific structure can be referred to as a reel-based closing system of patent document CN110049694A, but it is a matter of course that the present invention is mainly modified according to the requirement of bearing, and how to drive to realize forward or reverse rotation around the shaft 2 to realize retraction of the connecting member, and what kind of components are selected as adjustment (e.g. rotation, pressing, gesture touch, electric signal control), and the actual structure can be modified and designed according to the requirement for different functional components to meet the actual retraction adjustment requirement.

Further, as a preferred embodiment of the present invention, the winding branch structure is provided in two or more, one end of the connecting member extending from the shaft 2 is wound and extended continuously with a plurality of winding branch structures after being connected to the first winding branch structure, and the other end thereof is wound and pulled in the same manner.

Further, when one or more winding branch structures are arranged, the connecting piece is drawn to the first winding branch structure from the shaft 2 and then drawn out from the first winding branch structure, and the angle formed by the connecting piece at the first winding branch structure is 1-179 degrees; preferably, the angle formed by the connecting element at the first winding branch is preferably 120 ° to 150 °, i.e. in the plane formed by the shaft 2 and the winding branches, the first winding branch is arranged in a downward or upward direction around the shaft 2, and the traction direction of the connecting element is limited by the second winding branch or other connecting structures. Preferably, when the number of the winding branch structures is multiple, the connecting member extends from the shaft 2 to the first winding branch structure, and then from the first winding branch structure to the second winding branch structure, an included angle formed by the connecting member and the first winding branch structure ranges from 1 ° to 179 °, and traction force on the connecting member is shared to the winding branch structure by limiting a traction angle of the connecting member, so that abrasion around the shaft 2 during traction is reduced. Preferably, the wear of the winding branch structure can be reduced by increasing the number or the diameter of the winding branch structure.

Describing the specific arrangement of the winding support structure and the shaft 2 by the angle formed by the winding support structure, as shown in fig. 7, the direction of the traction force formed by the connection of the connection piece between the winding support structure and the shaft 2 is the second direction, the direction of the pressure generated by the connection piece born by the bearing force of the outer part connected with the connection piece on the shaft 2 is the first direction, and the included angle between the second direction and the first direction ranges from 1 ° to 179 °, preferably, the included angle between the second direction and the first direction ranges from 120 ° to 150 °, and when the included angle between the two directions is in this range, the shaft 2 and the winding support structure can be placed in a smaller spatial range, and a more force decomposition and bearing effect can be obtained; the traction direction formed by the connection of the connecting pieces between the winding branch structures is the third direction, and the included angle range between the third direction and the first direction is 1-179 degrees.

The arrangement of the angles reflects the arrangement relationship between the winding support structure and the shaft 2 and the winding and arrangement relationship of the connecting piece on the shaft 2 and the fulcrum, and the stress is decomposed in that the shaft 2 and the fulcrum can bear the bearing force of the outer part together, so that the connecting piece is arranged around the shaft 2 and arranged at the angles of the upper part, the lower part and the parallel and level of the shaft 2, the common bearing force can be realized through the winding arrangement, the common bearing force can also be realized in a similar cross arrangement mode on the shoelace theoretically, and the influence on the folding and unfolding effects needs to be considered.

Further, as a preferred embodiment of the present invention, the winding and unwinding device of the present invention further includes an installation part mechanism, wherein the installation part mechanism is mainly used for being installed in a matching manner with an external device, the winding support structure is arranged on the installation part mechanism, the force on the winding support structure is shared to the installation part mechanism through the installation of the installation part mechanism, and then the installation part mechanism is used for sharing the force to the whole external mechanism, so as to reduce the load of the winding and unwinding device on the winding shaft 2 and the winding support structure in the using process.

The installation part mechanism of the present invention is mainly a product packaging form for realizing the installation of the folding and unfolding device on the backpack 17, wherein the installation part mechanism according to one of the embodiments can be a plastic plate with a woven installation part sewed on the backpack 17, wherein the installation part mechanism can be integrated with the bearing part of the shaft 2 by injection molding, or can be in an installation relationship with the bearing part of the shaft 2, the winding support structure can be a support ring structure and arranged on the installation part mechanism, or part of the winding support structure is arranged on the installation part mechanism and part of the winding support structure is directly arranged on the backpack 17, of course, the installation part mechanism arranged on one backpack 17 for each winding support structure is also possible, and the winding support structure and the backpack 17 can be fixed more effectively and firmly.

Specifically, as an embodiment of the present invention, the adjusting part in the present invention includes a base 1 disposed on the housing structure, a shaft 2 is disposed on the base 1, and a disc 3 disposed parallel to the base 1 is disposed on the shaft 2 to form a receiving cavity for winding in the winding process. The connecting element is preferably a pull rope 4, the pull rope 4 is wound and pulled through the rotation around the shaft 2, and the external element is stretched through the pull rope 4. When the adjusting part is used for retraction and extension adjustment, the winding traction on the traction rope 4 is achieved around the shaft 2, the shaft 2 is a main bearing structure, and therefore when the traction rope 4 is connected with a heavy object, the main effect body of the traction rope is the shaft 2, and therefore the stress decomposition mechanism is mainly arranged for the shaft 2 so as to reduce the stress burden of the shaft 2 in the operation process. Of course, in the actual setting process, in order to avoid damage to the shaft 2 itself, the whole retracting device structure or the shaft 2 structure itself may be directly improved or the material strength thereof may be enhanced, so as to reduce the probability of damage in the using process.

Further, as a preferred embodiment of the present invention, a winding support structure is provided on the base 1 to decompose the force around the shaft 2. Specifically, the winding branch structure is a stand column 5, the setting direction of the stand column 5 is consistent with that of the structure around the shaft 2, one end of the stand column is fixed on the structure of the base 1, the other end of the stand column extends along the axial direction of the shaft 2, and the traction rope 4 is extended and wound on the stand column 5 from the position around the shaft 2, then is led out from the stand column 5 and is connected with an external component. Through on will winding to stand 5 around haulage rope 4 of axle 2 department, when haulage rope 4 received the pulling force, the pulling force at first can transmit stand 5 department, then extends to around axle 2 through haulage rope 4 again, and a part of outside pulling force can be undertaken in the setting of stand 5 to share the pulling force through stand 5 and to base 1 structurally, and then reduce haulage rope 4 to the traction force around axle 2, reduce the wearing and tearing around axle 2.

Preferably, the upright post 5 comprises two upright posts which are respectively arranged at two sides of the shaft 2, and a sufficient distance is left between the shaft 2 and the upright post 5 so as to wind the traction rope 4 and ensure that the shaft 2 and the traction rope 4 on the upright post 5 do not interfere with each other, so that the normal operation of the winding and unwinding device is ensured. And the winding shaft 2 and the two upright posts 5 are not in the same horizontal plane, so that when the traction rope 4 extending from the winding shaft 2 is wound on one upright post 5 and then extends towards the other upright post 5, the traction rope cannot pass through the winding shaft 2 again, and the interference on winding of the winding shaft 2 is avoided. Preferably, the two upright posts 5 and the three force-bearing fulcrums around the shaft 2 form an equilateral triangle structure to share the pulling force on the shaft 2.

Specifically, in conventional winding and unwinding devices use, the power on the haulage rope 4 acts on completely and encircles 2, make and to continue to receive the pulling force on the haulage rope 4 around axle 2, through increasing stand 5 structure to winding and unwinding devices adaptability, and make stand 5 and haulage rope 4's tensile direction be certain angle setting, haulage rope 4 that stretches out on the axle 2 winds to stand 5 back, make certain deflection take place around the last traction force of axle 2, and the power on the haulage rope 4 is decomposed into and is twined 2 towards the power of stand 5 direction and stand 5 orientation and stretch out the power of direction around axle 2, this main part that makes the traction force on the haulage rope 4 has become stand 5, greatly reduced haulage rope 4 to 2 traction force around the axle, thereby reach the purpose of extension around 2 life.

Further, the end of the column 5 extending around the structure of the disc 3 on the shaft 2 is connected to the disc 3 or is spaced from the disc 3. Preferably, the upright 5 is provided in the form as shown in fig. 1, one end of the upright 5 facing the disc 3 is spaced from the disc 3, and a wire blocking disc 6 is provided at the end of the upright 5 facing the disc 3 for preventing the traction rope 4 from falling off from the end of the upright 5, thereby affecting traction winding of the traction rope 4 inside the winding and unwinding device. Preferably, still be equipped with lead wire groove 7 on the stand 5, evenly twine the haulage rope 4 on the stand 5 through lead wire groove 7 for the stand 5 atress is even, and the winding route of haulage rope 4 can be standardized to lead wire groove 7, makes things convenient for receiving line and the unwrapping wire operation of winding and unwinding devices.

Further, as a preferred embodiment of the present invention, the force decomposing mechanism is disposed at the accommodating cavity of the traction rope 4, and is a ring-shaped supporting structure, which can generate a supporting function while winding the wire. Specifically, as shown in fig. 2, the stress decomposing mechanism includes a support ring 8, which is sleeved outside the shaft 2, and the support ring 8 and the shaft 2 are reserved with a sufficient winding space. One end of the support ring 8 is fixedly connected with the base 1 structure and used for transmitting the acting force to the base 1 structure after winding, and at least two first through holes 9 are formed in the support ring 8 in the circumferential direction, wherein one through hole is used for penetrating the traction rope 4, and the other through hole is used for penetrating out the traction rope 4. By pulling the traction rope 4 around the shaft 2 onto the support ring 8 and by means of the first through holes 9 distributed on the support ring 8, the tension on the rope is uniformly distributed on the support ring 8, so that the stress around the shaft 2 is reduced. Preferably, the contact part of the first through hole 9 and the pulling rope 4 is an arc-shaped surface structure or a sliding wheel structure is arranged at the contact surface, so that the friction force between the first through hole 9 and the pulling rope 4 is reduced, and the pulling work of the pulling rope 4 is facilitated.

Further, as an alternative embodiment of the present invention, the end of the support ring 8 facing the disc 3 is provided with an end cap 10, and a threading hole is provided on the end cap 10, so that the traction rope 4 drawn from the shaft 2 is wound on the surface of the end cap 10 to share the tension of the rope, as shown in fig. 3.

Further, as a preferred embodiment of the present invention, the force decomposing mechanism is disposed outside the accommodating cavity of the telescopic structure and is integrally disposed with the base 1 structure. Specifically, the force decomposing mechanism comprises a lead frame 11 which comprises a plurality of traction columns perpendicular to the structure of the base 1 for winding the traction rope 4, as shown in fig. 4 and 5.

Further, in order to avoid the traction rope 4 from being interfered by external components in the actual use process, the stress decomposing mechanism comprises a lead cylinder 12, and the traction rope 4 is restrained by the lead cylinder 12 so as to distribute the force on the traction rope 4 to the base 1. Preferably, at least one first steering member 13 is disposed in the passage of the lead reel 12, the first steering member 13 is preferably a sliding wheel structure, the sliding wheel structure can facilitate the stretching of the traction rope 4, and the sliding wheel structure can change the traction direction of the traction rope 4, and uniformly distribute the force on the traction rope 4 to the lead reel 12, so as to prevent the traction rope 4 from abutting only the outlet end and the inlet end of the lead reel 12, as shown in fig. 6.

Further, as a preferred embodiment of the present invention, a force decomposing mechanism is provided outside the adjusting portion to reduce the tensile force of the traction rope 4 about the shaft 2 when loading a heavy object. Specifically, the force decomposing mechanism comprises at least one second steering member 14, and the force on the traction rope 4 is subjected to traction and direction change through the second steering member 14, so that a part of the pulling force on the traction rope 4 is shared to the second steering member 14. In order to avoid the pull rope 4 from falling off the second steering member 14, the second steering member 14 can be provided with a stand column 5 provided with a wire blocking disc 6 and a wire leading groove 7 for pulling and winding the pull rope 4; or a second through hole for the pulling rope 4 to pass through is arranged on the second steering element 14 for winding the pulling rope 4. Preferably, the second steering member 14 is preferably a fixed pulley structure, the rope drawn from the shaft 2 is wound on the fixed pulley and then drawn from the fixed pulley, the traction force on the traction rope 4 is diverted through the fixed pulley structure, and the traction rope 4 is drawn at a certain angle, so that the force on the traction rope 4 is decomposed, and the tension of the traction rope 4 on the shaft 2 is reduced. Furthermore, a fixing piece which is connected with the external structure is arranged at the fixed pulley structure and used for fixing the fixed pulley and sharing the traction force at the fixed pulley to the external structure.

Preferably, the fixed pulley structures are preferably two, the two fixed pulley structures and the adjusting device are preferably arranged to be triangular structures, the traction rope 4 led out of the adjusting device is respectively wound on one of the fixed pulley structures, the original tension on the traction rope 4 is shared to the fixed pulley, and the force is decomposed into two obliquely upward forces through the fixed pulley structures, so that the stress of the adjusting device is reduced, the bearing force around the shaft 2 is reduced, and the possibility of damage of the adjusting device is reduced.

Preferably, the force-receiving mechanism is disposed inside or outside the adjustment device without any conflict, and therefore, the force-receiving mechanism may be disposed inside or outside the adjustment device at the same time.

Further, as a preferred embodiment of the present invention, the force decomposing mechanism is disposed outside the adjusting portion, and includes a force bearing plate 15 for sharing the force of the traction rope 4 pulled to the outside, and a plurality of lead supporting points are disposed on the force bearing plate 15, the traction rope 4 pulled from the shaft 2 is distributed to the force bearing plate 15 through the lead supporting points, and the force bearing area is enlarged to reduce the possibility of damage to the adjusting portion, as shown in fig. 8.

Further, as a preferred embodiment of the present invention, a guard band 16 is further provided between the adjustment portion and the force-bearing plate 15. The protective belt 16 is mainly used for forming a connection protection structure between the adjusting part and the stress plate 15, and the abrasion problem of the traction rope 4 in the process of connecting with the outside is avoided. At the same time, the protective belt 16 itself can also be fastened directly to the force-bearing plate 15 for the purpose of sharing the forces on the traction rope 4.

Further, the hauling cable 4 adopted by the connecting piece is one or more of a steel wire rope, a nylon rope and a nano fiber rope. The preferable composite construction, the haulage rope 4 is inside to be wire rope promptly to at the outside parcel nylon rope or nanofiber rope of wire rope, its when guaranteeing the toughness and the intensity of haulage rope 4, can also guarantee the lightweight of haulage rope 4 itself, the convenient traction work of winding and unwinding devices.

Further, the retractable device further comprises a retractable structure, the retractable structure is connected with the connecting piece, the retractable structure is preferably an elastic retractable belt structure and comprises a retractable piece main body and at least one retractable belt, and the retractable belt is partially or completely connected with the retractable piece main body, so that when the adjusting device drives the retractable belt to retract, the retractable piece main body can retract along with the extension of the retractable belt. Similarly, the telescopic structure can also be adjusted according to the actual stretching requirement and the weight of the prefabricated connected weight, for example, a plurality of telescopic belts are arranged on the telescopic part main body to drive the telescopic part main body to stretch; or the whole telescopic member main body is completely provided with an elastic belt structure. The former can reduce the bearing force of each telescopic belt to avoid the tensile damage of the telescopic belts, and the latter is easy to cause the stretching of the telescopic structure by the weight of a heavy object or the change of the use environment in the practical application process.

Preferably, because the telescopic structure is connected with the connecting piece, under the condition that the complexity of the manufacturing of the connecting piece is not considered, the connecting piece and the telescopic structure can be directly and integrally arranged, namely, the winding part of the connecting piece and the winding part of the shaft 2 and the upright post 5 are in a non-elastic structure, and the connecting piece and the external connecting part are in an elastic rope structure, so that the length adjustment and the elastic buffering are directly realized through the connecting piece.

Further, the retracting device of the present invention may be disposed on the backpack 17, and includes a backpack 17 body and shoulder straps disposed in pairs, and the retracting device is disposed on the backpack 17 body and is used to adjust the length of the shoulder straps.

The backpack 17 is the variable suspension backpack 17, the folding and unfolding device body of the variable suspension backpack 17 is not fixedly arranged on the backpack 17 body, the folding and unfolding device is arranged on the elastic structure and is connected with the backpack 17 body and the backpack 17 shoulder strap through the elastic structure, and the whole elastic structure can lift along with the folding and unfolding device in the process of adjusting the backpack 17 shoulder strap, so that the gravity center position of a user carrying the backpack 17 can be effectively adjusted, the optimal use comfort level is further achieved, meanwhile, the elastic structure can enable the elastic structure to form effective buffering when the user walks or exercises, the instantaneous pressure of the backpack 17 shoulder strap on a human body is reduced, and the use comfort level of the backpack 17 is further improved. Specifically, the specific structure of the variable suspension backpack 17 can be referred to as an adjustable suspension bag with patent number CN202120914300.6 and the specific structure and arrangement manner of the backpack 17 and the folding and unfolding device in the variable suspension bag with patent number CN 202120913064.6.

Specifically, the base 1 of the retraction device is fixed on the main body of the backpack 17, and the retractable structure is arranged corresponding to the shoulder strap. Wherein, the base 1 structure is fixed to be set up in knapsack 17 main part near with human back contact one side, and extending structure's extensible member main part sets up with the laminating of baldric, and the extensible belt wears to establish in the extensible member main part to when adjusting device adjusted the extensible belt length, the baldric can be together flexible along with the extensible member main part, and then realizes the flexible of baldric, in order to improve the travelling comfort that the user bore knapsack 17.

As an optional embodiment of the invention, the retraction device can be fixedly arranged on the shoulder belt, and the stress decomposition mechanism is integrally arranged on the retraction device, so that the effective decomposition of the traction force by the acceptance decomposition mechanism is ensured in the adjustment process of the shoulder belt by the retraction device. Meanwhile, in order to maintain the balance of the force of the backpack 17 on the user's shoulders during use, the retraction devices are preferably provided in pairs and respectively provided on both shoulder straps of the backpack 17.

Preferably, to ensure the comfort of use of the backpack 17, the user is prevented from being unevenly stressed on both shoulders after the shoulder straps are adjusted. The adjusting part corresponds to the telescopic structure on the synchronous traction shoulders to realize the synchronous adjustment of the shoulder belts, as shown in fig. 9, fig. 10 and fig. 11, the fixed pulley structure is fixedly arranged on the backpack 17 body to share the force on the adjusting part and synchronously adjust the telescopic structure to realize the adjustment of the length and the height of the shoulder belts. Preferably, in order to further share the force of the traction rope 4 to the adjustment part, a structure of a force bearing plate 15 can be arranged on the backpack 17 main body.

Further, in order to ensure the comfort of the user when using the backpack 17 and to prevent the retraction device from supporting the back of the user, a storage structure for accommodating the retraction device may be provided on the backpack 17 body, and an elastic cushion may be provided on the storage structure to improve the comfort of the backpack 17. Of course, as an alternative, the retraction device may be disposed at the bottom of the back panel of the backpack 17 in order to avoid the retraction device from touching the user.

According to the backpack 17 with the folding and unfolding device, the folding and unfolding device is arranged on the backpack 17 body, so that the length of the shoulder strap of the backpack 17 can be effectively adjusted, the backpack 17 is suitable for users of different ages and heights, and the comfort of the backpack 17 in use is ensured. And, through set up extending structure on the baldric for knapsack 17 carries out elastic buffer through extending structure when using, and then reduces knapsack 17 and the interior heavy object of package to the pressure of user's shoulder, improves knapsack 17's use travelling comfort, with the load impact that the buffering user bore, the spinal health of protection user.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A retraction device comprises a retractable device body,

a retraction adjusting part;

2. The retracting device according to claim 1, wherein the number of winding supports is at least two, and the outer member is connected around at least one winding support from a first end of the connecting member wound around the shaft, and the outer member is connected around another at least one winding support from another end of the connecting member wound around the shaft.

3. The retracting device according to claim 1 or 2, wherein the direction of the traction force between the winding support and the shaft due to the connection of the connecting member is a second direction, the direction of the pressure force applied to the shaft due to the weight of the outer member connected to the connecting member is a first direction, and the angle between the second direction and the first direction is in the range of 1 ° to 179 °.

4. The retracting device according to claim 3, wherein the direction of the traction force between the winding support structure and the winding support structure due to the connection of the connecting member is a third direction, and the angle between the third direction and the first direction ranges from 1 ° to 179 °.

5. A retraction device according to claim 3, wherein the angle between said second direction and said first direction is in the range 120 ° to 150 °.

6. The retracting device according to claim 5, wherein the winding support structure is two.

7. The retracting device according to any one of claims 1 to 6, wherein the retracting device is adapted to be mounted with a backpack, and the winding support structures are distributed and mounted directly on the backpack.

8. The retracting device according to any of claims 1 to 6, further comprising a mounting portion mechanism for mounting with a backpack, wherein the winding support structure is disposed in whole or in part on the mounting portion mechanism.

9. The storage device of claim 7, wherein the mounting location of the storage device to the backpack includes a back panel of the backpack and/or a shoulder strap of the backpack.

10. The retracting device according to claim 8, wherein the mounting position of the mounting mechanism to the backpack comprises a back plate of the backpack and/or a shoulder strap of the backpack.

11. The retracting device according to claim 7, wherein the shaft is arranged at a middle lower portion of the backpack backboard, and the at least two winding support structures are distributed on the backpack backboard around the shaft.

12. The retracting device according to claim 11, wherein the shaft is arranged at the middle lower part of the backpack back plate, the number of the winding support structures is two, the outer member is connected around one winding support structure from the first end of the connecting member wound out of the shaft, the outer member is connected around the other winding support structure from the other end of the connecting member wound out of the shaft, and the included angle between the second direction and the first direction is preferably in the range of 120 degrees to 150 degrees.

13. The retracting device according to claim 10, wherein the shaft is disposed in a central portion of the mounting portion mechanism, and the at least two winding support structures are disposed on the mounting portion mechanism around the shaft.

14. The retracting device according to claim 13, wherein the shaft is arranged in the middle of the mounting portion, the number of winding supports is two, the outer member is connected around one winding support from a first end of the connecting member wound around the shaft, the outer member is connected around the other winding support from the other end of the connecting member wound around the shaft, and the angle between the second direction and the first direction is preferably in the range of 120 ° to 150 °.

15. The retracting device according to any one of claims 1 to 14, wherein the winding support structure is provided with a through groove for the connecting piece or a block structure with a spacing space for limiting the winding connecting piece, so as to form winding.

16. The retracting device according to any one of claims 1 to 6, wherein the retracting device comprises a bearing member around the shaft, the winding support structure comprises a plurality of columns, the plurality of columns are distributed on the bearing member, one end of each column is fixedly connected with the bearing member, and the other end of each column extends axially around the shaft.

17. The reel of claim 16, wherein a plurality of said posts are provided with wire retaining discs at ends thereof facing away from said carrier and slots are provided in said posts for orderly winding of said connecting members.

18. The retracting device according to claim 17, wherein the number of the upright posts is preferably two, and the angle between the tangential direction of the connecting member between the upright posts and the shaft and the traction force direction is preferably in the range of 120 ° to 150 °.

19. The winding and unwinding device of any one of claims 1 to 6, wherein the winding support structure comprises a support ring, the support ring is sleeved on the shaft with a gap around the shaft, and the support ring is provided with at least one first through hole for a connector to pass through.

20. The retracting device according to claim 19, characterized in that a lead support is provided on a side of the support ring facing away from the shaft, for pulling a connecting element inserted into the first through hole.

21. The retracting device according to claim 19 or 20, wherein a side of the support ring facing away from the shaft is further provided with a guide sleeve.

22. The retracting device according to claim 21, wherein at least a first deflecting member for changing the pulling direction of the connecting element is further provided in the thread cartridge.

23. The retracting device according to claim 21, wherein the support ring is provided with an end cap structure closing an end of the support ring facing away from the carrier, and the first through hole is provided in a circumferential side wall of the support ring or in the end cap structure.

24. The retracting device according to any one of claims 1 to 6, wherein the retracting device comprises a bearing member around a shaft and a housing case having the bearing member, the winding support structure is inserted into the housing case, one end of the winding support structure has an insertion portion of the connecting member, and the other end of the winding support structure is a fixing portion for fixing with a backpack or a mounting mechanism mounted on the backpack.

25. A winding and unwinding device according to claim 24, wherein said winding support is preferably two and said second direction is preferably at an angle in the range of 120 ° to 150 ° to said first direction.

26. The retraction device according to any one of claims 16 to 25, wherein said retraction device is mounted to a back panel or upper shoulder strap of said backpack.

27. The retracting device of claim 26, wherein the connecting member is a non-elastic cord, an elastic cord, or a combination of a non-elastic cord and an elastic cord.

28. The retracting device according to claim 27, wherein the connecting member and the portion wound around the shaft are non-elastic cords and the connecting portion with the outer member is an elastic cord.

29. The retraction device according to claim 28, wherein the outer member includes a resilient arrangement.