CN111846339A - Fastening device - Google Patents

Abstract

The present invention provides a fastening device, which includes a housing unit, a knob and a detent unit. The housing unit includes a side wall and a plurality of engaging teeth. The side wall surrounds and forms a receiving space, and the plurality of engaging teeth protrude from the side wall toward the receiving space. The knob can be covered on the housing unit; the detent unit is located in the receiving space, and the detent unit corresponds to the engaging teeth and is selectively coupled to the knob. The knob switches between a first position and a second position along the axial direction. When the knob is located in the first position, it is coupled to the detent unit so that the knob and the detent unit move together. The detent unit engages with at least one engaging tooth to prevent the knob from rotating in the first direction. When the knob is located in the second position, the knob is away from the detent unit and separated from the detent unit, and the detent unit does not prevent the knob from rotating in the first direction. This increases the reliability of the structure.

Description

Fastening device

technical field

The present invention relates to a fastening device, and more particularly, to a fastening device capable of retracting and releasing a tether.

Background technique

In daily life, ropes and laces are often used to bind objects. The most common binding method is to use the threads to shuttle back and forth through the holes on the objects, and then fix them with knots, such as tying shoes and so on. However, this kind of binding method is easy to cause the knot to loosen due to external force, which not only has to tie the knot again, but also brings a lot of inconvenience because the object cannot be stably bound.

In order to solve such problems, some manufacturers have developed a simple wire harnessing mechanism, which includes a casing, a detent unit and a spring. The casing has a perforated hole for the wire body to pass through, which passes through the space between the spring and the detent unit. The acting force of the wire body is clamped between the detent unit and the casing to achieve the fastening effect, and the wire body can be pulled to change the length of the wire body by pressing the spring to change the position of the detent unit. However, this kind of wire harnessing mechanism provides the tightening force through the restoring force of the spring, and it is still easy to loosen the wire body due to vibration or external force, and this kind of wire harnessing mechanism has no space to accommodate the wire body, so the wire body Exposure can also be dangerous.

Therefore, another industry has developed another buckle that can be rotatably collected and fixed. The wire can be accommodated inside the buckle, and the length of the wire can be adjusted through the mechanical interference of the internal components. At the same time adjust the tightness of the bandha. However, the structure of such a fastener is complicated, which increases the manufacturing cost, and also has the problems of difficulty in assembly and maintenance.

Therefore, there are constantly adjustments and improvements to the internal structure of the fastener, hoping to maintain the fastening capability of the fastener under the premise of simplifying the structure, and to increase the structural reliability to avoid shortening the service life.

In view of this, how to effectively improve the structure of fastening devices such as buckles has become the goal of the relevant industry.

SUMMARY OF THE INVENTION

The present invention provides a fastening device, which can simplify the structure and increase the reliability of the structure through the overall structural configuration.

According to an embodiment of an aspect of the present invention, a fastening device is provided, which includes a housing unit, a wire disc, a positioning shaft, a knob and a detent unit, and the housing unit includes a side wall and a partition portion and a plurality of occlusal teeth, the side wall surrounds to form an accommodating space, the partition portion radially protrudes from the side wall to divide the accommodating space into an upper accommodating room and a lower accommodating room, and the plurality of occlusal teeth are located in the upper accommodating room. The spool is located in the lower chamber and includes a flexible clamping part; the positioning shaft is penetrated through the spool to be coupled with the flexible clamping part, and the positioning shaft has an axial direction. The knob can be covered on the housing unit and connected to the positioning shaft; the detent unit is located in the upper chamber, and the detent unit corresponds to the engaging teeth and is selectively coupled to the knob. Wherein, the knob linkage positioning shaft is switched between a first position and a second position along the axial direction, when the knob is at the first position, it is coupled to the detent unit, and the detent unit is engaged with at least one engaging tooth to prevent the thread The reel rotates in a first direction. When the knob is in the second position, the knob is separated from the latching unit, and the latching unit does not prevent the reel from rotating in the first direction.

Thereby, only the knob is displaced in the axial direction, and the detent unit remains in the original position, which can increase the structural reliability.

According to various embodiments of the aforementioned fastening device, the spool may include a hollow body, an upper ring portion and a lower ring portion, the hollow body includes an inner peripheral wall surrounding a through space for the positioning shaft to pass through, and the upper ring The lower ring part protrudes radially outward from one end of the hollow body, and the lower ring part projects radially outward from the other end of the hollow body; wherein, a winding track is formed between the upper ring part and the lower ring part, and the flexibility The clip portion protrudes from the inner peripheral wall toward the through space to be coupled to the positioning shaft. Alternatively, the positioning shaft may include a positioning protrusion. When the knob is at the first position, the positioning protrusion is located on one side of the flexible clip portion. When the knob is switched from the first position to the second position in the axial direction, the positioning protrusion pushes against After the flexible card portion is deformed, it is located on the other side of the flexible card portion.

According to various embodiments of the aforementioned fastening device, the housing unit may further include a limiting portion, the limiting portion is located in the upper chamber and connected to the partition portion, and the limiting portion limits the detent unit. Alternatively, the housing unit may include a through hole, the through hole is located in the partition portion, the limiting portion includes four limiting arms, the four limiting arms are spaced around the through hole, and a free end of each limiting arm limits the detent unit.

According to various embodiments of the aforementioned fastening device, the knob may include a plurality of first driving teeth, the detent unit may include a plurality of first engaging teeth, and when the knob is in the first position, the first driving teeth are engaged with the first driving teeth. A coupling tooth, when the knob is in the second position, the first driving tooth is disengaged from the first coupling tooth. Alternatively, the knob may further include a cover body, a protruding column and a plurality of second driving teeth, the cover body covers the housing unit; the convex column is disposed on the cover body and extends into the through hole, and the plurality of second driving teeth are located away from the convex column A distal end of the cover is coupled to the wire reel. Alternatively, the knob may further include a cover body, a protruding column and a plurality of second driving teeth, the cover body covers the housing unit; the convex column is disposed on the cover body and corresponds to the through hole, and the plurality of second driving teeth are located on the convex column away from the cover a distal end of the body; and the fastening device also includes a planetary gear set, the planetary gear set includes a sun gear and a plurality of planetary gears, the sun gear is engaged with the second driving tooth; the plurality of planetary gears are arranged at intervals on the spool and meshed connected to the sun gear; and the housing unit further includes a plurality of planetary inner teeth, which are located in the lower chamber and engage with the plurality of planetary gears.

Another embodiment according to an aspect of the present invention provides a fastening device, which includes a housing unit, a knob and a detent unit, the housing unit includes a side wall and a plurality of engaging teeth, and the side wall surrounds to form a In the accommodating space, a plurality of engaging teeth protrude toward the accommodating space from the side wall. The knob can be covered on the housing unit; the detent unit is located in the accommodating space, and the detent unit corresponds to the engaging teeth and is selectively coupled to the knob. The knob is switched between a first position and a second position along an axis, and when the knob is at the first position, it is coupled to the detent unit, so that the knob and the detent unit move together, and the detent unit and at least one engaging tooth The knob is locked to prevent the knob from rotating in a first direction. When the knob is at the second position, the knob is away from the detent unit and is separated from the detent unit, and the detent unit does not prevent the knob from rotating in the first direction.

Thereby, only the knob is displaced in the axial direction, and the detent unit remains in the original position, which can increase the structural reliability.

According to various embodiments of the aforementioned fastening device, it may further include a wire reel and a positioning shaft, the wire reel is limited to the accommodating space and includes a flexible clip portion, and the positioning shaft is passed through the wire reel to be connected with the flexibility. The clamping part is coupled, the positioning shaft has an axial direction, and the positioning shaft is linked by the knob, wherein the wire reel is coupled when the knob is in the first position.

According to various embodiments of the aforementioned fastening device, the spool may include a hollow body, an upper ring portion and a lower ring portion, the hollow body includes an inner peripheral wall surrounding a through space for the positioning shaft to pass through, and the upper ring The lower ring part protrudes radially outward from one end of the hollow body, and the lower ring part projects radially outward from the other end of the hollow body; wherein, a winding track is formed between the upper ring part and the lower ring part, and the flexibility The clip portion protrudes from the inner peripheral wall toward the through space to be coupled to the positioning shaft. Alternatively, the positioning shaft may include a positioning protrusion. When the knob is at the first position, the positioning protrusion is located on one side of the flexible clip portion. When the knob is switched from the first position to the second position in the axial direction, the positioning protrusion pushes against After the flexible card portion is deformed, it is located on the other side of the flexible card portion.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of a fastening device according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the fastening device of FIG. 1;

FIG. 3 shows another exploded schematic view of the fastening device of FIG. 1;

4 is a schematic cross-sectional view of the fastening device of FIG. 1;

FIG. 5 is another schematic cross-sectional view of the fastening device of FIG. 1;

6 is a schematic perspective view of a fastening device according to another embodiment of the present invention;

FIG. 7 is an exploded schematic view of the fastening device of FIG. 6;

FIG. 8 shows another exploded schematic view of the fastening device of FIG. 6;

FIG. 9 is a schematic cross-sectional view of the fastening device of FIG. 6; and

FIG. 10 is another schematic cross-sectional view of the fastening device of FIG. 6 .

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings. For the sake of clarity, many practical details are set forth in the following description. The reader should understand, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the present invention, these practical details are unnecessary. Furthermore, for the purpose of simplifying the drawings, some well-known and conventional structures and elements will be shown in the drawings in a simplified and schematic manner; and repeated elements will possibly be designated by the same or similar numerals.

In addition, when a certain element (or mechanism or module, etc.) is "connected", "arranged" or "coupled" to another element herein, it may mean that the element is directly connected, directly arranged or directly coupled to the other element , can also mean that an element is indirectly connected, indirectly arranged or indirectly coupled to another element, that is, there are other elements interposed between the element and the other element. When it is expressly stated that an element is "directly connected", "directly arranged" or "directly coupled" to another element, it means that no other element is interposed between the said element and the other element. The terms first, second, and third are only used to describe different elements or components, and do not limit the elements/components themselves. Therefore, the first element/component may also be renamed as the second element/component. And the combination of elements/components/mechanisms/modules in this article is not a generally well-known, conventional or known combination in this field, and the combination relationship cannot be determined by whether the components/components/mechanisms/modules themselves are known or not. Is it easy to be done easily by a person of ordinary knowledge in the technical field.

Please refer to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , wherein FIG. 1 is a three-dimensional schematic diagram of a fastening device 100 according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of the fastening device 100 of FIG. 1 FIG. 3 shows another exploded schematic diagram of the fastening device 100 of FIG. 1 , FIG. 4 shows a cross-sectional schematic diagram of the fastening device 100 of FIG. 1 , and FIG. 5 shows the fastening device 100 of FIG. 1 Another cross-sectional schematic diagram of . The fastening device 100 includes a housing unit 200 , a wire disc 300 , a positioning shaft 600 , a knob 500 and a detent unit 400 .

The housing unit 200 includes a side wall 220 and a plurality of engaging teeth 240 . The side wall 220 surrounds an accommodating space (not shown), and the plurality of engaging teeth 240 protrudes from the side wall 220 toward the accommodating space. The knob 500 is covered on the housing unit 200 and connected to the positioning shaft 600 ; the detent unit 400 is located in the accommodating space, and the detent unit 400 corresponds to the engaging teeth 240 and is selectively coupled to the knob 500 . One of the knob 500 and the housing unit 200 includes a plurality of engaging teeth 240 (in this embodiment, the housing unit 200 includes a plurality of engaging teeth 240 ) corresponding to the detent unit 400 , and the knob 500 is positioned along a first axis I1 on a first Switching between a position and a second position, when the knob 500 is in the first position, it is coupled to the detent unit 400, so that the knob 500 and the detent unit 400 move together, and the detent unit 400 is engaged with at least one engaging tooth 240 to prevent The knob 500 is rotated in a first direction R1. When the knob 500 is in the second position, the knob 500 is far away from the detent unit 400 and separated from the detent unit 400. The detent unit 400 does not prevent the knob 500 from rotating in the first direction R1.

Therefore, only the knob 500 is displaced along the axial direction I1, and the detent unit 400 remains in the original position, which can increase the structural reliability. The details of the fastening device 100 will be described in more detail later.

The housing unit 200 may include the aforementioned side wall 220 , a partition portion 230 and the aforementioned plurality of engaging teeth 240 . The partition portion 230 radially protrudes from the side wall 220 to divide the accommodating space into an upper chamber S11 and a lower chamber S11 In the chamber S12 , the plurality of engaging teeth 240 are located in the upper chamber S11 , and the detent unit 400 is located in the upper chamber S11 to correspond to the engaging teeth 240 . More specifically, the housing unit 200 may further include a chassis 210 , and the side wall 220 may include an upper peripheral wall 221 and a lower peripheral wall 222 , the lower peripheral wall 222 is fixed to the chassis 210 , and the partition portion 230 is connected to the upper peripheral wall 221 The lower edge of the side wall 220 may further include four positioning portions 223 and four positioning holes 224, each positioning portion 223 protrudes downward from the lower edge of the upper peripheral wall 221, and each positioning hole 224 is located on the lower peripheral wall 222 and is used for each positioning portion 223 chimeras. Therefore, after each positioning portion 223 is engaged with each positioning hole 224 , the chassis 210 , the lower peripheral wall 222 and the partition portion 230 surround the lower chamber S12 , and the upper peripheral wall 221 and the partition portion 230 surround the upper chamber S11 .

The housing unit 200 may further include a limiting portion 250 , the limiting portion 250 is located in the upper chamber S11 and connected to the partition portion 230 , and the limiting portion 250 limits the detent unit 400 . Through the action of the limiting portion 250 , the detent unit 400 can be confined in the upper chamber S11 to prevent it from being separated from the housing unit 200 . Preferably, the housing unit 200 may include a through hole 260 , the through hole 260 is located in the partition portion 230 , the limiting portion 250 includes four limiting arms 251 , the four limiting arms 251 are spaced around the through hole 260 , and each limiting arm 251 A free end 2511 of the stopper unit 400 is limited. The through hole 260 penetrates through the center of the partition portion 230 along the axial direction I1 so that the lower chamber S12 is communicated with the upper chamber S11 , and the four limiting arms 251 protrude upward along the axial direction I1 from the partition portion 230 adjacent to the through hole 260 . extending and forming a free end 2511 having a radial lip structure. Thereby, the detent unit 400 can be placed in the upper chamber S11 from top to bottom along the axial direction I1, and the four limit arms 251 are radially deformed after being pressed to pass through the central hole (not shown) of the detent unit 400. After the moving unit 400 is completely placed in the upper chamber S11 , the four limiting arms 251 are reset and the free ends 2511 limit the locking unit 400 to achieve the effect of limiting the locking unit 400 .

The fastening device 100 may further include a wire reel 300 and a positioning shaft 600. The wire reel 300 is limited to the accommodating space and includes a flexible clip portion 340. The positioning shaft 600 passes through the wire reel 300 to connect with the flexible clip portion. 340 is coupled, the positioning shaft 600 has an axial direction I1, and the positioning shaft 600 is linked by the knob 500, wherein the knob 500 is coupled to the wire reel 300 when the knob 500 is in the first position. Thereby, the knob 500 is coupled to the detent unit 400 when the knob 500 is in the first position, and the detent unit 400 is engaged with the at least one engaging tooth 240 in the first direction R1 to prevent the spool 300 from rotating in the first direction R1; otherwise, When the knob 500 is located at the second position, the knob 500 is separated from the detent unit 400, so the detent unit 400 does not prevent the spool 300 from rotating in the first direction R1.

The spool 300 may include a hollow body 310 , an upper ring portion 320 and a lower ring portion 330 . The hollow body 310 includes an inner peripheral wall 311 surrounding a through space T2 for the positioning shaft 600 to pass through. The upper ring portion 320 is formed from the hollow body 310 . One end (not marked) protrudes radially outward, and the lower ring portion 330 protrudes radially outward from the other end of the hollow body 310; wherein, a winding track T1 is formed between the upper ring portion 320 and the lower ring portion 330 , and the flexible clip portion 340 protrudes from the inner peripheral wall 311 toward the through space T2 to be coupled to the positioning shaft 600 . In addition, the positioning shaft 600 may include a positioning protrusion 610. When the knob 500 is located at the first position, the positioning protrusion 610 is located on one side of the flexible clip portion 340. When the knob 500 is switched from the first position to the second along the axis I1 When in position, the positioning protrusion 610 pushes against the flexible card portion 340 and deforms, and then is positioned on the other side of the flexible card portion 340 .

In detail, the inner peripheral wall 311 includes an upper diameter section 3112 and a lower diameter section 3111. The upper diameter section 3112 has a straight surface area (not shown) and an inclined surface area (not shown), the straight surface area is connected to the inclined surface area, and the inclined surface area is connected to In the lower diameter section 3111 , the flexible clip portion 340 includes four clip arms 341 protruding from the inclined surface area toward the through space T2 and forming a clip end 3411 having a radial lip structure. The positioning shaft 600 also includes a bottom portion 620 and a shaft portion 630. The shaft portion 630 is disposed on the bottom portion 620, and the positioning protrusion 610 is positioned on the shaft portion 630. Therefore, the positioning shaft 600 can enter the through space T2 from bottom to top and be engaged with the flexible The clip portion 340 and the bottom portion 620 are limited to the lower diameter section 3111 . The fastening device 100 can further include a screw 700 , and the screw 700 can be used to connect the positioning shaft 600 and the knob 500 , so that the positioning shaft 600 and the knob 500 move together.

When the knob 500 drives the positioning shaft 600 to move upward along the axial direction I1, the positioning protrusion 610 pushes against the four clamping arms 341 to radially deform the four clamping arms 341, and the positioning protrusion 610 is displaced from the aforementioned side of the flexible clamping portion 340 to the On the other side, the four clamping arms 341 are reset, so that the knob 500 can be kept in the second position.

The winding track T1 can be used for winding a tie wire (not shown), and the housing unit 200 may further include a second wire hole 270, the second wire hole 270 is located on the lower peripheral wall 222, and the wire hole 270 can communicate with the lower chamber S12. Therefore, the tie wire The wire can enter and exit the lower chamber S12 through the second wire hole 270 to be released or wound on the wire winding track T1.

The knob 500 may include a plurality of first driving teeth 540, and the detent unit 400 includes a plurality of first engaging teeth 410. When the knob 500 is in the first position, the first driving teeth 540 engage with the first engaging teeth 410, and when the knob 500 is in the first position When in the second position, the first driving teeth 540 are separated from the first coupling teeth 410 . In addition, the knob 500 may further include a cover body 510, a protruding post 520 and a plurality of second driving teeth 530. The cover body 510 covers the housing unit 200; A second driving tooth 530 is located at a distal end of the protruding post 520 away from the cover 510 for coupling to the spool 300 .

The cover body 510 of the knob 500 includes an inner top surface (not shown), the protruding post 520 protrudes from the inner top surface in a direction away from the inner top surface, the second driving teeth 530 are located on the outer peripheral surface of the protruding post 520, and the plurality of first A driving tooth 540 is located on the inner top surface and surrounds the protruding post 520 . The detent unit 400 may include a hollow ring body 430 , and a plurality of first coupling teeth 410 are located at the upper end of the hollow ring body 430 . When the cover body 510 is assembled with the housing unit 200 , the first driving teeth 540 are correspondingly engaged with the first coupling teeth 410 , the protruding post 520 can extend into the through hole 260 , so that the second driving teeth 530 are combined with a plurality of second coupling teeth (not shown) located on the upper diameter section 3112 , so that the knob 500 is coupled to the spool 300 .

In this embodiment, the detent unit 400 further includes a plurality of ratchet arms 420, each ratchet arm 420 protrudes outward from each hollow ring body 430, and the ratchet arm 420 is engaged with at least one engaging tooth 240 in the first direction R1, Therefore, the detent unit 400 cannot be rotated toward the first direction R1; on the contrary, each ratchet arm 420 is continuously separated from the engaging teeth 240 in a second direction R2 opposite to the first direction R1, so that the detent unit 400 can be opposed to the housing The unit 200 is rotated in the second direction R2.

As shown in FIG. 4 , the knob 500 is at the first position, the first driving tooth 540 of the knob 500 is engaged with the first coupling tooth 410 of the detent unit 400 , and the second driving tooth 530 of the knob 500 is engaged with the spool 300 . The second engaging tooth is that when the user rotates the knob 500 toward the second direction R2, the ratchet arm 420 is continuously separated from the engaging tooth 240, and the knob 500 can drive the spool 300 to tie the tether; conversely, when the user releases the When turning the knob 500, the ratchet arm 420 is engaged with at least one engaging tooth 240, the rotation of the knob 500 is restricted by the detent unit 400, and the spool 300 is prevented from rotating in the first direction R1, so that the tightening effect can be achieved.

As shown in FIG. 5 , when the user wants to release the tether, the knob 500 can be pulled up along the axial direction I1. At this time, the first driving tooth 540 of the knob 500 is separated from the first engaging tooth 410 of the detent unit 400, The second driving teeth 530 of the knob 500 are also separated from the second coupling teeth of the spool 300 , so the rotation of the knob 500 and the spool 300 is not restricted by the detent unit 400 . In other embodiments, when the knob is located at the second position, the second driving teeth of the knob may not be separated from the second coupling teeth of the spool, which is not limited thereto.

Please refer to FIG. 6 , FIG. 7 , FIG. 8 , FIG. 9 and FIG. 10 , wherein FIG. 6 is a schematic perspective view of a fastening device 100 a according to another embodiment of the present invention, and FIG. 7 is the fastening device of FIG. 6 An exploded schematic diagram of 100a, FIG. 8 is another exploded schematic diagram of the fastening device 100a of FIG. 6, FIG. 9 is a schematic cross-sectional view of the fastening device 100a of FIG. 6, FIG. 10 is a schematic diagram of the fastening device of FIG. 6 Another schematic cross-sectional view of 100a. The structure of the fastening device 100a is similar to that of the fastening device 100 of FIGS. 1 to 5 , but the combination of the spool 300a and the knob 500a is different.

More specifically, the knob 500a may further include a cover body 510a, a protruding post 520a and a plurality of second driving teeth 530a. The cover body 510a covers the housing unit 200a; (not shown), the plurality of second driving teeth 530a are located at a distal end of the boss 520a away from the cover 510a; and the fastening device 100a further includes a planetary gear set 800a, the planetary gear set 800a includes a sun gear 810a and a plurality of planets The gear 820a (including four planetary gears 820a in this embodiment), the sun gear 810a is meshed with the second driving tooth 530a; the plurality of planetary gears 820a are arranged on the spool 300a at intervals and meshed with the sun gear 810a; and the housing unit 200a also It includes a plurality of planetary inner teeth 280a, which are located in the lower chamber S12 and engage with a plurality of planetary gears 820a.

The protruding post 520a has a notch (not shown) at the distal end, the second driving tooth 530a is located in the notch, the sun gear 810a is fitted into the notch to engage with the second driving tooth 530a, and the spool 300a includes four pivots 350a for the four planetary gears 820a to pivot.

The partition portion 230a of the housing unit 200a may protrude inwardly from a middle portion of the upper peripheral wall 221a, and the partition portion 230a is used as a boundary. The lower half of the 221a, the lower peripheral wall 222a and the chassis (not shown) form the lower chamber S12, and the planetary inner teeth 280a can be disposed in the lower half of the upper peripheral wall 221a. When the knob 500a is rotated, the second driving tooth 530a drives the sun gear 810a, and the planetary gear 820a is rotated and displaced along the planetary inner teeth 280a by the sun gear 810a, so as to rotate the spool 300a.

Therefore, as shown in FIG. 9, the knob 500a is at the first position, the first driving tooth 540a of the knob 500a is engaged with the first engaging tooth 410a of the detent unit 400a, and the second driving tooth 530a of the knob 500a is engaged with the planetary gear In the group 800a, when the user rotates the knob 500a in the second direction, the ratchet arm 420a is continuously separated from the occlusal tooth 240a, and the knob 500a can drive the spool 300a to tie the tether; conversely, when the user releases the knob 500a , the ratchet arm 420a is engaged with at least one engaging tooth 240a, the rotation of the knob 500a is restricted by the detent unit 400a, and at the same time, the spool 300a is prevented from rotating in the first direction, so that the tightening effect can be achieved.

As shown in FIG. 10 , when the user wants to release the tether, the knob 500a can be pulled up in the axial direction, at this time the first driving tooth 540a of the knob 500a is separated from the first engaging tooth 410a of the detent unit 400a, The rotation of the knob 500a and the spool 300a is not restricted by the detent unit 400a, and since the sun gear 810a is still meshed with the planetary gear 820a, the knob 500a and the spool 300a are still coupled.

Although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be subject to the scope defined by the appended claims.

Claims (12)

1. A fastening device, comprising:

a housing unit, comprising: a side wall surrounding to form a containing space; a partition part radially protruding from the side wall to divide the accommodating space into an upper accommodating chamber and a lower accommodating chamber; and a plurality of engaging teeth located in the upper chamber;

a wire coil located in the lower chamber and including a flexible clamping part;

a positioning shaft, which is arranged through the wire coil to be coupled with the flexible clamping part and is provided with an axial direction;

The knob is covered on the shell unit and connected with the positioning shaft; and

the braking unit is positioned in the upper accommodating chamber, corresponds to the plurality of meshing teeth and is selectively coupled with the knob;

when the knob is located at the second position, the knob is separated from the braking unit, and the braking unit does not prevent the wire coil from rotating towards the first direction.

2. The fastening device of claim 1, wherein the wire coil comprises:

a hollow main body, which comprises an inner peripheral wall surrounding to form a through space for the positioning shaft to pass through;

an upper ring part, which protrudes outwards from one end of the hollow main body in the radial direction; and

a lower ring part protruding outward from the other end of the hollow main body in a radial direction;

wherein, a winding track is formed between the upper ring part and the lower ring part, and the flexible clamping part protrudes from the inner peripheral wall to the through space to be coupled with the positioning shaft.

3. The fastening device according to claim 2, wherein the positioning shaft includes a positioning protrusion, the positioning protrusion is located on one side of the flexible locking portion when the knob is located at the first position, and the positioning protrusion pushes the flexible locking portion to deform and then locate on the other side of the flexible locking portion when the knob is switched from the first position to the second position along the axial direction.

4. The fastening device according to claim 1, wherein the housing unit further comprises a limiting portion, the limiting portion is located in the upper chamber and connected to the partition portion, and the limiting portion limits the stopper unit.

5. The fastening device of claim 4, wherein the housing unit comprises a through hole located in the partition portion, the limiting portion comprises four limiting arms spaced around the through hole, and a free end of each limiting arm limits the stopper unit.

6. The fastening device of claim 5, wherein the knob includes a first plurality of driving teeth, the detent unit includes a first plurality of engaging teeth, the first plurality of driving teeth engage the first plurality of engaging teeth when the knob is in the first position, and the first plurality of driving teeth disengage from the first plurality of engaging teeth when the knob is in the second position.

7. The fastening device of claim 6, wherein the knob further comprises:

a cover body covering the housing unit;

a convex column which is arranged on the cover body and extends into the through hole; and

and the plurality of second driving teeth are positioned at the far end of the convex column far away from the cover body so as to be coupled with the wire coil.

8. The fastening device according to claim 6,

the knob further comprises: a cover body covering the housing unit; a convex column which is arranged on the cover body and corresponds to the through hole; the second driving teeth are positioned at the far end of the convex column far away from the cover body;

the fastening device further comprises a planetary gear set comprising: a sun gear engaged with the plurality of second driving teeth; the planetary gears are arranged on the wire coil at intervals and are meshed with the sun gear; and is

The housing unit further comprises: and the planetary internal teeth are positioned in the lower accommodating chamber and are meshed with the planetary gears.

9. A fastening device, comprising:

a housing unit, comprising: a side wall surrounding to form a containing space; and a plurality of engaging teeth protruding from the side wall toward the accommodating space;

a knob covering the housing unit; and

The braking unit is positioned in the accommodating space, corresponds to the plurality of meshing teeth and is selectively coupled with the knob;

when the knob is located at the second position, the knob is far away from the braking unit and is separated from the braking unit, and the braking unit does not prevent the knob from rotating towards the first direction.

10. The fastening device of claim 9, further comprising:

a wire coil which is limited in the containing space and comprises a flexible clamping part; and

a positioning shaft, which is arranged through the wire coil to be coupled with the flexible clamping part, has the axial direction and is linked by the knob;

wherein the knob is coupled to the spool when in the first position.

11. A fastening device according to claim 10, wherein the wire coil comprises:

a hollow main body, which comprises an inner peripheral wall surrounding to form a through space for the positioning shaft to pass through;

An upper ring part, which protrudes outwards from one end of the hollow main body in the radial direction; and

a lower ring part protruding outward from the other end of the hollow main body in a radial direction;

wherein, a winding track is formed between the upper ring part and the lower ring part, and the flexible clamping part protrudes from the inner peripheral wall to the through space to be coupled with the positioning shaft.

12. The fastening device according to claim 11, wherein the positioning shaft includes a positioning protrusion, the positioning protrusion is located on one side of the flexible locking portion when the knob is located at the first position, and the positioning protrusion pushes the flexible locking portion to deform and then locate on the other side of the flexible locking portion when the knob is switched from the first position to the second position along the axial direction.

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