Braid winding and unwinding device

Abstract

The utility model provides a braid take-up and pay-off device which comprises a shell, a take-up and pay-off roller and a transmission assembly. The take-up and pay-off roller can be rotationally installed in the shell, a woven belt is wound around the take-up and pay-off roller, and the woven belt can stretch out of the shell. The transmission assembly is arranged in the shell and comprises an input shaft, an output shaft and a transmission shaft. The input shaft is perpendicular to the output shaft and can drive the output shaft to rotate through the transmission shaft. The output shaft can drive the take-up and pay-off roller to rotate; the input shaft and the shell can be relatively fixed. According to the braid winding and unwinding device, the braid can be directly wound and unwound, assemblies such as a connecting rope and an adjusting rope are not needed any more, and the adjusting process is simpler and more direct. After adjustment, the braids are all stored in the shell, and discomfort caused by braid stacking to a user can be avoided. The braid can be protected through the shell, the braid can be prevented from being disordered, and the stability of the braid fixing device is improved.

Description

Technical Field

[0001] The utility model relates to the field of webbing, and in particular to a webbing retracting and releasing device. Background Art

[0002] Wearable devices such as face slimming devices, eye massagers, and outdoor headlights usually need to be fixed on the user's body with the help of a webbing. In order to ensure the user's experience, the webbing of wearable devices usually has a length adjustment function so that the webbing can fit the user's body and make it comfortable to wear.

[0003] In the related art, the length of the webbing is usually adjusted by connecting ropes, adjusting ropes, etc. to control the extension or contraction of the webbing to achieve the length adjustment function. However, this adjustment method will cause the webbing to pile up when the webbing contracts, affecting the wearing effect and wearing reliability of the user. In addition, in this adjustment method, the connecting rope or adjusting rope needs to be exposed to the outside and remain connected to the webbing. Once it is disturbed by the outside world or accidentally touched by the user, the connecting rope or adjusting rope will fail, and the adjustment ability will be lost, and the stability will be poor. Utility Model Content

[0004] In order to overcome the deficiencies in the related art, the utility model provides a webbing retracting and releasing device.

[0005] The embodiment of the utility model is achieved as follows:

[0006] A webbing retracting device comprises: a housing, a retracting roller and a transmission assembly. The retracting roller is rotatably mounted in the housing, a webbing is wound around the retracting roller, and the webbing can extend out of the housing. The transmission assembly is arranged in the housing, and the transmission assembly comprises an input shaft, an output shaft and a transmission shaft. The input shaft is arranged perpendicular to the output shaft, and the input shaft can drive the output shaft to rotate through the transmission shaft; the output shaft can drive the retracting roller to rotate; the input shaft and the housing can be relatively fixed.

[0007] Furthermore, the transmission shaft is arranged in parallel with the output shaft, the input shaft drives the transmission shaft to rotate via a bevel gear, and the transmission shaft drives the output shaft to rotate via a spur gear.

[0008] Further, the spur gear is arranged at the end of the transmission shaft, and the bevel gear is arranged at a position on the transmission shaft away from the spur gear.

[0009] Further, the bevel gear includes a first bevel gear and a second bevel gear, the first bevel gear is arranged on the input shaft at a position facing the transmission shaft, the second bevel gear is arranged on the transmission shaft, and the first bevel gear is meshed with the second bevel gear.

[0010] Further, the spur gear includes a first spur gear and a second spur gear, the first spur gear is arranged on the transmission shaft, the second spur gear is arranged on the output shaft, and the first spur gear is meshed with the second spur gear.

[0011] Furthermore, a speed change shaft is provided between the transmission shaft and the output shaft, the speed change shaft is rotatably mounted in the housing, a speed change gear is provided on the speed change shaft, the speed change gear is provided between the first spur gear and the second spur gear, and is meshed with the first spur gear and the second spur gear at the same time.

[0012] Furthermore, two retractable rollers are provided, and the two retractable rollers are respectively provided at two ends of the shell, and the webbings on the two retractable rollers extend from two ends of the shell to the outside of the shell respectively.

[0013] Furthermore, a limiting portion is provided on the shell, a rotating member is rotatably provided in the limiting portion, and the rotating member can rotate unidirectionally relative to the limiting portion; the end of the input shaft away from the output shaft extends to the outside of the shell and is connected to the rotating member.

[0014] Furthermore, the limiting portion is configured as a groove, and a ratchet is provided on the inner wall of the groove, an elastic arm is provided at the edge of the rotating member, the elastic arm is arranged in an arc shape, and a check portion is provided on the side of the elastic arm facing the ratchet, the check portion can abut against the ratchet, and the check portion is meshed with the ratchet.

[0015] Furthermore, a clearance groove is provided between the elastic arm and the rotating member, and the non-return portion can be retracted into the clearance groove, so that the non-return portion is disengaged from the ratchet.

[0016] The beneficial effects of the embodiments of the utility model are:

[0017] The utility model provides a webbing retracting and releasing device, comprising: a housing, a retracting and releasing roller and a transmission assembly. The retracting and releasing roller is rotatably installed in the housing, a webbing is wound around the retracting and releasing roller, and the webbing can extend to the outside of the housing. The transmission assembly is arranged in the housing, and the transmission assembly comprises an input shaft, an output shaft and a transmission shaft. The input shaft is arranged perpendicular to the output shaft, and the input shaft can drive the output shaft to rotate through the transmission shaft; the output shaft can drive the retracting and releasing roller to rotate. By rotating the input shaft, the input shaft can drive the output shaft to rotate through the transmission shaft, that is, by rotating the input shaft, the retracting and releasing roller can be driven to rotate, so as to retract and release the webbing.

[0018] The webbing retracting and releasing device provided by the utility model can directly retract and release the webbing when the webbing needs to be adjusted, without the need for connecting ropes, adjusting ropes and other components, and the adjustment process is simpler and more direct. After adjustment, the webbing is stored in the shell to avoid discomfort to the user caused by the accumulation of webbing, thereby improving the comfort of the utility model when in use. The shell can protect the webbing, which can avoid confusion of the webbing and improve the stability and reliability of the utility model. In addition, the retracting and releasing rollers and the transmission assembly are also arranged in the shell. The shell protects the structure of the utility model, which can reduce the failure rate of the utility model, extend the service life of the utility model, and further improve the reliability and stability of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a webbing retracting and releasing device from one perspective of an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a webbing retracting and releasing device from one perspective of another embodiment of the utility model;

[0022] Figure 3 A webbing retracting and releasing device according to another embodiment of the utility model Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 A webbing retracting and releasing device according to another embodiment of the utility model Figure 2 A partial enlarged view of point B in the middle;

[0024] Figure 5 It is a structural schematic diagram of a webbing retracting and releasing device from another perspective of another embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a webbing retracting and releasing device from another perspective of another embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the appearance structure of a webbing retracting and releasing device of another embodiment of the utility model from another perspective.

[0027] icon:

[0028] 100-housing; 200-retracting roller; 210-ribbon; 211-connecting piece; 300-transmission assembly; 310-input shaft; 311-first bevel gear; 320-transmission shaft; 321-second bevel gear; 322-first spur gear; 330-output shaft; 331-second spur gear; 340-speed shaft; 341-speed gear; 410-limiting part; 411-ratchet; 420-rotating part; 421-elastic arm; 422-check part; 423-gap groove; 430-knob cover; 500-accessories. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] This embodiment provides a webbing retracting and releasing device to solve the problems in the related art, such as the complicated webbing adjustment process, unreliable structure, and easy accumulation of webbing that affects the comfort of the user.

[0037] See also Figure 1 , Figure 2 and Figure 5 A webbing retracting device comprises: a housing 100, a retracting roller 200 and a transmission assembly 300. The retracting roller 200 is rotatably mounted in the housing 100, a webbing 210 is wound around the retracting roller 200, and the webbing 210 can extend to the outside of the housing 100. The transmission assembly 300 is arranged in the housing 100, and the transmission assembly 300 comprises an input shaft 310, an output shaft 330 and a transmission shaft 320. The input shaft 310 is arranged perpendicular to the output shaft 330, and the input shaft 310 can drive the output shaft 330 to rotate through the transmission shaft 320; the output shaft 330 can drive the retracting roller 200 to rotate; the input shaft 310 and the housing 100 can be relatively fixed.

[0038] Specifically, when the webbing retracting device of this embodiment is used to adjust the webbing 210, the input shaft 310 is rotated, and the input shaft 310 drives the output shaft 330 to rotate through the transmission shaft 320, and the output shaft 330 can drive the retracting roller 200 to rotate. The webbing 210 is wound around the retracting roller 200, and by controlling the rotation of the retracting roller 200, the webbing 210 can be controlled to extend or retract, and the webbing 210 can be adjusted and controlled. After the webbing 210 is extended to a suitable length, the input shaft 310 is fixed relative to the housing 100, that is, the input shaft 310 can no longer rotate, and accordingly, the transmission shaft 320, the output shaft 330, and the retracting roller 200 can also not rotate, so that the webbing 210 can maintain the current state unchanged, which is convenient for users to use.

[0039] It should be noted that this embodiment can be applied to any device that requires a webbing to be worn. For example, this embodiment can be applied to a backpack, where the housing 100 of this embodiment is connected to the backpack body, and the webbing 210 extending from the housing 100 is connected to the backpack straps. When the backpack straps need to be adjusted, it is only necessary to rotate the input shaft 310 of this embodiment, and the length of the straps can be controlled by controlling the length of the webbing 210 to adjust the straps to a suitable length and fit the user.

[0040] Similarly, this embodiment can also be applied to products such as protective gear and cushions that require the assistance of the webbing 210 for fixing. Exemplarily, this embodiment is set on the protective gear and cushion to be fixed, and the housing 100 is provided with a connecting piece 211. After the webbing 210 is extended, it is wound around the fixed piece. After the winding is completed, the end of the webbing 210 is re-extended to the housing 100 and connected to the connecting piece 211 to form a closed loop. In this way, the protective gear, cushions and other products can be fixed by the webbing 210.

[0041] In one embodiment, for example, Figure 1 , Figure 2 , Figure 5 As shown, the transmission shaft 320 is arranged in parallel with the output shaft 330, the input shaft 310 drives the transmission shaft 320 to rotate through the bevel gear, and the transmission shaft 320 drives the output shaft 330 to rotate through the spur gear. The transmission of force or motion between each shaft is carried out through the bevel gear or spur gear. On the one hand, it can ensure accurate motion transmission, and there will be no error in gear meshing transmission, that is, when the webbing 210 is adjusted, the adjustment length is accurate; on the other hand, the gear and the shaft cooperate to transmit a large torque, that is, when the webbing 210 is adjusted, there will be no insufficient torque transmission to affect the adjustment, thereby improving the reliability and accuracy of this embodiment.

[0042] In one embodiment, for example, Figure 3 As shown, the spur gear is arranged at the end of the transmission shaft 320, and the bevel gear is arranged at a position away from the spur gear on the transmission shaft 320. The spur gear and the bevel gear are arranged in a staggered manner to avoid interference during the transmission process and improve the stability of this embodiment.

[0043] In addition, the spur gear is set at any position, and the transmission ratio can be changed by changing the diameter of the spur gear, so that the present embodiment can achieve a suitable adjustment speed. When the bevel gear is transmitting, if it is necessary to change the diameter of the bevel gear to change the transmission ratio and adjust the transmission speed, it is necessary to change the position of the bevel gear on the transmission shaft 320 to ensure that the bevel gear on the transmission shaft 320 can mesh with the bevel gear on the input shaft 310. In this way, by setting the bevel gear inside the transmission shaft 320, the transmission ratio of the bevel gear can be changed by changing the position of the bevel gear, so that the structure of the present embodiment is more reasonable and the control of the transmission ratio is more flexible.

[0044] In one embodiment, for example, Figure 2 , Figure 3 As shown, the bevel gears include a first bevel gear 311 and a second bevel gear 321. The first bevel gear 311 is arranged on the input shaft 310 at a position facing the transmission shaft 320, and the second bevel gear 321 is arranged on the transmission shaft 320. The first bevel gear 311 is meshed with the second bevel gear 321. When adjusting the extension length of the webbing 210, the input shaft 310 is rotated, and the first bevel gear 311 on the input shaft 310 is meshed with the second bevel gear 321 on the transmission shaft 320. When the input shaft 310 is rotated, the transmission shaft 320 will rotate with the bevel gears, and then the motion will be transmitted to the output shaft 330 and the retracting roller 200, so as to complete the adjustment of the extension length of the webbing 210.

[0045] It should be noted that the input shaft 310 and the transmission shaft 320 are arranged vertically and transmitted through the first bevel gear 311 and the second bevel gear 321. The purpose is to make the structure of this embodiment more stable and reasonable, make full use of the space in the shell 100, reduce the space required for this embodiment, and make this embodiment flexibly and conveniently applicable to any wearable device.

[0046] Furthermore, the input shaft 310 is arranged perpendicularly to the transmission shaft 320, which is also for the convenience of the user to adjust during use. Specifically, the webbing on the wearable device usually needs to fit the user's body, that is, the axis of the retractable roller 200 needs to be arranged parallel to the user's skin, and accordingly, the transmission roller and the output shaft 330 also need to be arranged parallel to the retractable roller 200. If the input shaft 310 is also arranged parallel to the retractable roller 200, then when the user rotates the input shaft 310 for adjustment, under the condition that the space of the shell 100 is limited in this embodiment, the user's hand will inevitably touch the skin, affecting the convenience of the adjustment process. However, the input shaft 310 is arranged perpendicularly to the transmission shaft 320 through a bevel gear, that is, the axis of the input shaft 310 is kept perpendicular to the user's skin, the user will not be hindered when adjusting, the adjustment is more convenient and simple, and the present embodiment is more convenient to use.

[0047] The input shaft 310 is vertically arranged with respect to the transmission shaft 320, and can also cooperate with the bevel gear transmission. That is, when it is necessary to adjust the transmission ratio between the first bevel gear 311 and the second bevel gear 321, the diameter of the first bevel gear 311 is changed, and accordingly, the position of the second bevel gear 321 is changed on the transmission shaft 320, so that the first bevel gear 311 and the second bevel gear 321 remain meshed, and the adjustment can be completed.

[0048] In one embodiment, for example, Figures 1 to 3 As shown, the spur gears include a first spur gear 322 and a second spur gear 331. The first spur gear 322 is disposed on the transmission shaft 320, and the second spur gear 331 is disposed on the output shaft 330. The first spur gear 322 meshes with the second spur gear 331. Through the cooperation of the first spur gear 322 and the second spur gear 331, the transmission shaft 320 drives the output shaft 330 to rotate, that is, drives the retracting roller 200 to rotate, so that the transmission accuracy is high and the transmission torque is strong, so that the retracting and releasing process of the webbing 210 of this embodiment is more reliable and accurate.

[0049] In one embodiment, for example, Figures 1 to 3 As shown, a speed change shaft 340 is also provided between the transmission shaft 320 and the output shaft 330. The speed change shaft 340 can be rotatably installed in the housing 100. A speed change gear 341 is provided on the speed change shaft 340. The speed change gear 341 is provided between the first spur gear 322 and the second spur gear 331, and is meshed with the first spur gear 322 and the second spur gear 331 at the same time. The speed change gear 341 is provided between the first spur gear 322 and the second spur gear 331, so that the adjustment of the transmission ratio of the present embodiment can be more flexible and the adjustment range can be larger. Specifically, when the first spur gear 322 and the second spur gear 331 are transmitting, the adjustment of the transmission ratio can be achieved by changing the diameters of the first spur gear 322 and the second spur gear 331; the first spur gear 322 maintains a stable rotation speed, and the larger the diameter of the first spur gear 322 and the smaller the diameter of the second spur gear 331, the greater the rotation speed of the second spur gear 331. After the speed change gear 341 is provided, the same principle enables the adjustment range of the transmission ratio between the transmission shaft 320 and the retracting roller 200 to be larger, so that this embodiment can be applied to any wearable device that needs to be adjusted.

[0050] In one embodiment, for example, Figure 2As shown, two retractable rollers 200 are provided, and the two retractable rollers 200 are respectively provided at the two ends of the shell 100, and the webbing 210 on the two retractable rollers 200 respectively extends from the two ends of the shell 100 to the outside of the shell 100. Two retractable rollers 200 are provided in the shell 100, and both are driven by the input shaft 310, that is, after the input shaft 310 is rotated, the webbing 210 can extend from both sides of the shell 100. In this way, the application scope of this embodiment is further expanded, so that this embodiment can be applied to any wearable device that requires the webbing 210. For example, such as waist protectors, O-shaped leg correctors, and binding belts.

[0051] It should be noted that a webbing pressure plate is provided on the side of the retracting roller 200, that is, the webbing is provided between the webbing pressure plate and the retracting roller 200, so that the webbing can be stably and reliably transmitted when it is extended or retracted, and wrinkles of the webbing can be prevented during transmission, which affects the transmission. The webbing pressure plate can be connected to the side of the retracting roller 200 in any manner, such as bolt connection, riveting, bonding, etc., as long as the webbing pressure plate and the retracting roller 200 can be relatively fixed.

[0052] It should be noted that two retractable rollers 200 are provided, and accordingly, two output shafts 330 and two transmission shafts 320 are also provided. The two output shafts 330 are driven by two transmission shafts 320 respectively, and the two transmission shafts 320 are driven by the input shaft 310 .

[0053] It is understandable that two retracting rollers 200 are provided, and accordingly, one of the retracting rollers 200 is provided with a webbing 210, and the other retracting roller 200 can be adaptively provided with a webbing 210 or a connecting piece, as long as the present embodiment can achieve a fixing effect.

[0054] For example, Figure 3 As shown, two transmission shafts 320 are provided, and the two transmission shafts 320 are coaxially arranged, and the two transmission shafts 320 are both provided with a second bevel gear 321 and a first spur gear 322. The two first spur gears 322 can mesh with the second spur gears 331 of the two output shafts 330 respectively, and the two second bevel gears 321 can mesh with different sides of the first bevel gear 311 at the same time. In this way, when the input shaft 310 rotates, the two second bevel gears 321 on the two transmission shafts 320 can be driven to rotate at the same time through the first bevel gear 311, that is, the two transmission shafts 320 are driven to rotate synchronously, and then the two retracting rollers 200 are controlled at the same time, that is, the extension or contraction of the two webbings 210 is controlled. The adjustment difficulty of this embodiment is further reduced, and the application scenario of this embodiment is expanded, so that this embodiment is easy to use.

[0055] In one embodiment, for example, Figures 5 to 7As shown, the end of the webbing 210 extending out of the housing 100 is provided with a connector 211, and the webbing 210 can be connected to the webbing 210 of any wearable device through the connector 211. In this embodiment, the specific structure of the connector 211 is not limited, as long as it can play a connecting role. Exemplarily, the connector 211 can be set as a magnetic buckle, a card buckle, a Japanese buckle, a mouth buckle, a buckle, etc., connected to the target accessory 500, and adjust the tightness of the webbing 210 of the target accessory 500.

[0056] In one embodiment, for example, Figure 2 , Figure 4 As shown, a limiting portion 410 is provided on the housing 100, and a rotating member 420 is rotatably disposed in the limiting portion 410, and the rotating member 420 can rotate unidirectionally relative to the limiting portion 410; the end of the input shaft 310 away from the output shaft 330 extends to the outside of the housing 100 and is connected to the rotating member 420. After the webbing 210 is adjusted to a suitable length, the input shaft 310 is connected to the rotating member 420, and the limiting portion 410 can limit the rotating member 420 to only rotate in one direction, that is, after the webbing 210 is extended to a suitable length, the rotating member 420 can be limited by the limiting portion 410, thereby limiting the rotation of the input shaft 310, so that the webbing 210 is kept at a suitable length for use by the user.

[0057] In one embodiment, for example, Figure 2 , Figure 4 As shown, the limiting portion 410 is set as a groove, and a ratchet 411 is set on the inner wall of the groove. An elastic arm 421 is set at the edge of the rotating member 420. The elastic arm 421 is set in an arc shape. A non-return portion 422 is set on the side of the elastic arm 421 facing the ratchet 411. The non-return portion 422 can abut against the ratchet 411, and the non-return portion 422 is engaged with the ratchet 411. When the rotating member 420 rotates in a preset direction, the ratchet 411 will not restrict the non-return portion 422, so that the rotating member 420 can rotate normally. The rotating member 420 is connected to the input shaft 310, that is, the input shaft 310 can rotate normally in one direction, that is, when using the webbing 210 retracting and releasing device of this embodiment, the webbing 210 is first set at a suitable position for the user to wear, and then the input shaft 310 is rotated to tighten the webbing 210 until the webbing 210 fits on the user's body, and the adjustment of the webbing 210 can be completed. When the rotating member 420 rotates in the reverse direction, it will be restricted by the non-return portion 422 and the ratchet 411 , so that the rotating member 420 cannot rotate, that is, the input shaft 310 cannot rotate in the reverse direction, so that the webbing 210 maintains the current length unchanged.

[0058] It should be noted that when the webbing 210 needs to be stretched again, it is only necessary to control the elastic arm 421 on the rotating member 420, compress the elastic arm 421, and disengage the non-return portion 422 from the ratchet 411 on the limiting portion 410, so that the rotating member 420 is no longer restricted by the limiting portion 410 and can rotate freely, that is, the input shaft 310 is no longer restricted, and the retractable roller 200 can adjust the webbing 210 at will, either stretching or shrinking. After the adjustment is completed, the compression of the elastic arm 421 is released to restore the elastic arm 421 to its initial state, and the non-return portion 422 is engaged with the ratchet 411, so that the length of the webbing 210 can be limited again.

[0059] In one embodiment, for example, Figure 2 , Figure 4 As shown, a clearance groove 423 is provided between the elastic arm 421 and the rotating member 420, and the non-return portion 422 can be retracted into the clearance groove 423, so that the non-return portion 422 is disengaged from the ratchet 411. By providing the clearance groove 423, when the non-return portion 422 needs to be disengaged from the ratchet 411, it is sufficient to compress the elastic arm 421 in the direction close to the clearance groove 423, leaving room for the elastic arm 421 to move, making the structure of this embodiment more reasonable.

[0060] In one embodiment, for example, Figure 2 , Figure 4 As shown, a knob cover 430 is provided on the housing 100, and the knob cover 430 can be rotatably sleeved on the outside of the limiting portion 410. In this way, the limiting portion 410 and the rotating member 420 can be protected by the knob cover 430 to prevent the limiting portion 410 and the rotating member 420 from being knocked or damaged by the outside, making this embodiment more reliable.

[0061] In addition, a toggle rod is provided on the side of the knob cover 430 facing the limiting portion 410, and the toggle rod includes a first toggle rod and a second toggle rod, the first toggle rod extends into the clearance groove 423, and the second toggle rod extends into the outside of the elastic arm 421, so that when the knob cover 430 rotates in one direction, the first toggle rod can extend into the clearance groove 423 to push the rotating member 420 to rotate, so that the input shaft 310 can rotate in one direction. When the knob cover 430 rotates in the opposite direction, the second toggle rod can compress the elastic arm 421, so that the non-return portion 422 on the elastic arm 421 is disengaged from the ratchet 411, and the input shaft 310 can rotate in any direction.

[0062] In one embodiment, for example, Figure 5As shown, the first bevel gear 311 is rotatably mounted on the housing 100, and a first one-way tooth is provided on the side of the first bevel gear 311 facing the input shaft 310, and correspondingly, a second one-way tooth is provided on the end face of the input shaft 310, and the first one-way tooth is meshed with the second one-way tooth, so that the first bevel gear 311 and the input shaft 310 can only rotate in a single direction. When it is necessary to rotate in another direction, the input shaft 310 is pulled out in a direction away from the first bevel gear 311, so that the first one-way tooth and the second one-way tooth are disengaged, and the first bevel gear 311 can rotate in any direction.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A webbing retracting and releasing device, characterized in that: include: Housing (100); A retractable roller (200), the retractable roller (200) being rotatably mounted in the housing (100), a webbing (210) being wound around the retractable roller (200), and the webbing (210) being able to extend to the outside of the housing (100); A transmission assembly (300), the transmission assembly (300) being disposed in the housing (100), the transmission assembly (300) comprising an input shaft (310), an output shaft (330) and a transmission shaft (320); The input shaft (310) and the output shaft (330) are arranged vertically; the input shaft (310) can drive the output shaft (330) to rotate through the transmission shaft (320); the output shaft (330) can drive the retracting roller (200) to rotate; the input shaft (310) and the shell (100) can be relatively fixed.

2. The webbing retracting and releasing device according to claim 1, characterized in that: The transmission shaft (320) is arranged in parallel with the output shaft (330); the input shaft (310) drives the transmission shaft (320) to rotate via a bevel gear; and the transmission shaft (320) drives the output shaft (330) to rotate via a spur gear.

3. The webbing retracting and releasing device according to claim 2, characterized in that: The spur gear is arranged at the end of the transmission shaft (320), and the bevel gear is arranged at a position on the transmission shaft (320) away from the spur gear.

4. The webbing retracting and releasing device according to claim 2, characterized in that: The bevel gears include a first bevel gear (311) and a second bevel gear (321); the first bevel gear (311) is arranged on the input shaft (310) at a position facing the transmission shaft (320); the second bevel gear (321) is arranged on the transmission shaft (320); the first bevel gear (311) is meshed with the second bevel gear (321).

5. The webbing retracting and releasing device according to claim 2, characterized in that: The spur gears include a first spur gear (322) and a second spur gear (331); the first spur gear (322) is arranged on the transmission shaft (320); the second spur gear (331) is arranged on the output shaft (330); the first spur gear (322) is meshed with the second spur gear (331).

6. The webbing retracting and releasing device according to claim 5, characterized in that: A speed change shaft (340) is also provided between the transmission shaft (320) and the output shaft (330); the speed change shaft (340) is rotatably mounted in the housing (100); a speed change gear (341) is provided on the speed change shaft (340); the speed change gear (341) is provided between the first spur gear (322) and the second spur gear (331), and is meshed with the first spur gear (322) and the second spur gear (331) at the same time.

7. The webbing retracting and releasing device according to claim 1, characterized in that: Two retractable rollers (200) are provided, and the two retractable rollers (200) are respectively provided at two ends of the shell (100), and the webbing (210) on the two retractable rollers (200) respectively extends from two ends of the shell (100) to the outside of the shell (100).

8. The webbing retracting and releasing device according to claim 1, characterized in that: The housing (100) is provided with a limit portion (410), a rotating member (420) is rotatably arranged in the limit portion (410), and the rotating member (420) can rotate unidirectionally relative to the limit portion (410); the end of the input shaft (310) away from the output shaft (330) extends to the outside of the housing (100) and is connected to the rotating member (420).

9. The webbing retracting and releasing device according to claim 8, characterized in that: The limiting portion (410) is arranged as a groove, and a ratchet (411) is arranged on the inner wall of the groove; an elastic arm (421) is arranged at the edge of the rotating member (420); the elastic arm (421) is arranged in an arc shape; a non-return portion (422) is arranged on the side of the elastic arm (421) facing the ratchet (411); the non-return portion (422) can abut against the ratchet (411), and the non-return portion (422) is meshed with the ratchet (411).

10. The webbing retracting and releasing device according to claim 9, characterized in that: A clearance groove (423) is provided between the elastic arm (421) and the rotating member (420), and the non-return portion (422) can be retracted into the clearance groove (423), so that the non-return portion (422) is disengaged from the ratchet (411).

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