TWI747681B - Fastening device - Google Patents

Abstract

The present disclosure provides a fastening device including case unit, a spool, an engaging unit, a knob and a connecting unit. The case unit includes a housing and a base. An inner space is formed by the housing. The base is configured for the housing to be disposed thereon. The spool is located within the inner space and includes an axial space. The locking unit is located within the inner space and selectively prohibits the spool from rotating in a loosening direction. The knob covers on the housing. The connecting unit is inserted into the axial space to connect to the knob so as to restrict the housing, the spool, the locking unit and the knob. The base does not connect to the connecting unit directly. Therefore, the structure thereof can be simplified and the reliably thereof can be increased.

Description

Fastening device

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

In daily life, cords and ties are often used to condense items. The most common constriction method is to use the cord to shuttle back and forth through the holes in the items, and then fasten them with knots, such as tying ropes and shoes. However, this kind of binding method is prone to loose knots due to external forces. Not only must the knots be re-tied, but it also brings a lot of inconveniences due to the inability to securely bind the objects.

In order to solve such problems, some companies have developed a simple wire harness mechanism, which includes a housing, a detent unit and a spring. The housing has a hole for the wire to pass through. The force causes the wire body to be clamped between the detent unit and the housing to achieve a fastening effect. The length of the wire body can be changed by pulling the spring to change the position of the detent unit. However, this kind of wire harness mechanism provides the tightening force through the return force of the spring, and it is still easy to loose the wire body due to vibration or external force factors, and this kind of wire harness mechanism has no space to accommodate the wire body, so the wire body is exposed. It is also easy to cause danger.

Therefore, another industry has developed another type of buckle that can be rotatably constricted and fixed. The thread body can be accommodated inside the buckle, and the length of the thread body can be adjusted through the mechanical force interference of the internal components. The tightness of the bundle. However, the structure of this kind of buckle is complicated, which increases the manufacturing cost and also has the problem of difficulty in assembly and maintenance.

Therefore, manufacturers continue to adjust and improve the internal structure of the buckle, hoping to maintain the fastening ability of the buckle while simplifying the structure, and increase the reliability of the structure to avoid shortening the life.

In view of this, how to effectively improve the structure of fasteners and other fastening devices has become the goal of relevant industry efforts.

The invention provides a fastening device, which can increase the reliability of the structure through the structural configuration of the wire reel and the connecting unit.

According to one embodiment of the present invention, a fastening device is provided, which includes a housing unit, a wire reel, a detent unit, a knob, and a connection unit. The housing unit includes a ring wall and a base, the ring wall surrounds an internal space, and the base The ring wall is provided; the wire reel is located in the inner space and includes an axis space; the detent unit is located in the inner space and selectively prevents the wire reel from rotating in a release direction; the knob cover is arranged on the ring wall. The connecting unit is penetrated in the axial space and connected to the knob to limit the ring wall, the wire reel, the detent unit and the knob. Among them, the base is not directly connected to the connecting unit.

According to an embodiment of the aforementioned fastening device, the axial space may include a large-diameter section and a small-diameter section, and the small-diameter section is axially connected to the large-diameter section.

According to an embodiment of the aforementioned fastening device, the connection unit may include a first component group and a second component group. The first component group is connected to the knob, the second component group penetrates the axial space to connect to the first component group, and the second component group is restricted by the large-diameter section.

According to an embodiment of the aforementioned fastening device, the first component group may include a screw, and the second component group may include a connecting sleeve. The connecting sleeve includes a top and a barrel, and the barrel is connected to the top. The part passes through the small-diameter section and is used for screw locking, and the top is limited to the large-diameter section.

According to an embodiment of the aforementioned fastening device, the knob may include a protruding column protruding toward the inner space in the axial direction, and the cylindrical portion is engaged with the protruding column, so that the connecting sleeve and the knob can move simultaneously.

According to an embodiment of the aforementioned fastening device, the first component group may include a locking sleeve, and the second component group may include a stop ring and a screw, the stop ring is limited to the large diameter section, and the screw passes through The stop ring and the small diameter section are locked to the locking shaft sleeve.

According to an embodiment of the aforementioned fastening device, wherein the locking sleeve may include a lower inserting portion, and the stop ring includes an inner inserting groove, and the inner inserting groove is engaged with the lower inserting portion.

According to an embodiment of the aforementioned fastening device, the knob may include a protruding column protruding toward the inner space in the axial direction, and the locking sleeve includes an upper inserting portion connected to the lower inserting portion, and the upper inserting portion and The convex post is fitted.

According to an embodiment of the aforementioned fastening device, the locking sleeve may include a lower end surface, and after the screw is locked into the locking sleeve, the stop ring is pressed against the lower end surface.

According to an embodiment of the aforementioned fastening device, the first component group may include a locking sleeve, the second component group may include a screw, the screw includes a head and a rod, and the rod is connected to the head, The rod part penetrates the shaft center space to be locked to the locking shaft sleeve, and the head is restricted by the large diameter section.

According to an embodiment of the aforementioned fastening device, the housing unit may further include an inner ring recess, which is recessed at the lower end of the ring wall to limit the wire reel.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplification of the drawings, some conventionally used structures and elements will be drawn in a simple schematic manner in the drawings; and repeated elements may be represented by the same or similar numbers.

In addition, when a component (or mechanism or module, etc.) is “connected”, “configured” or “coupled” to another component in this document, it can mean that the component is directly connected, directly disposed, or directly coupled to another component It can also mean that an element is indirectly connected, indirectly disposed, or indirectly coupled to another element, that is, there are other elements between the element and another element. When it is clearly stated that a certain element is "directly connected", "directly arranged" or "directly coupled" to another element, it means that there is no other element between the element and another element. The terms first, second, third, etc., are only used to describe different elements or components, and have no limitation on the elements/components themselves. Therefore, the first element/component can also be renamed as the second element/component. And the combination of components/components/mechanisms/modules in this article is not a combination of general well-known, conventional or conventional in this field. It is not possible to judge whether the combination relationship is based on whether the component/component/mechanism/module itself is a conventional one. It can be easily completed by ordinary knowledgeable persons in the technical field.

Please refer to FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5. FIG. 1 is a perspective view of a fastening device 100 according to a first embodiment of the present invention, and FIG. 2 is Shows an exploded schematic view of the fastening device 100 in Fig. 1, Fig. 3 shows another exploded schematic view of the fastening device 100 in Fig. 1, and Fig. 4 shows a cross-sectional view of the fastening device 100 in Fig. 1 Schematic diagram, FIG. 5 shows another schematic cross-sectional view of the fastening device 100 of FIG. 1. The fastening device 100 includes a housing unit 200, a wire reel 300, a detent unit 400, a knob 500 and a connection unit 600.

The housing unit 200 has a radial direction (not shown) and an axial direction I1 and includes a ring wall 220 that surrounds an inner space 240. The bobbin 300 is located in the internal space 240 and includes an axial space 340. The axial space 340 includes a large diameter section 342 and a small diameter section 341. The small diameter section 341 is connected to the large diameter section 342 along the axial direction I1; the detent unit 400 is arranged above the bobbin 300 along the axial direction I1, the detent unit 400 selectively blocks the rotation of the bobbin 300 in a release direction A1; the knob 500 is arranged above the detent unit 400 along the axial direction I1, and the knob 500 is coupled to棣动unit 400. The connecting unit 600 is connected to the knob 500, and the connecting unit 600 penetrates the axial space 340 and is restricted by the large diameter section 342.

Thereby, by allowing the axial space 340 of the spool 300 to have a large-diameter section 342 and a small-diameter section 341, the connecting unit 600 can be confined to the large-diameter section 342, so as to avoid the housing unit 200, the spool 300, and the movement The unit 400 and the knob 500 are loosened and separated during the rotation, which can help increase the reliability of the structure. The detailed structure of the fastening device 100 will be described in detail later.

The housing unit 200 may further include a stopper 250, the stopper 250 is located on the ring wall 220 and protrudes radially toward the inner space 240, and the wire reel 300 is located below the stopper 250. The housing unit 200 further includes a base 210, a plurality of occlusal teeth 230, and an inner ring recess 260. The base 210 is provided with the ring wall 220, and the ring wall 220 may be arranged on the base 210 in a snap-fit manner. The plurality of occlusal teeth 230 are located on the ring wall 220 and face the inner space 240, the occlusal teeth 230 are located at an upper end of the ring wall 220, the inner ring recess 260 is recessed at the lower end of the ring wall 220, and the stop portion 250 has a convex ring structure and is adjacent to Bite the teeth 230. In other words, the inner ring recess 260 and the stop portion 250 can be formed through the change of the inner diameter of the ring wall 220.

The bobbin 300 includes a hollow shaft 380, an upper ring portion 360, and a lower ring portion 370. The upper ring portion 360 and the lower ring portion 370 respectively protrude radially outward from the hollow shaft column 380, and the upper ring portion 360 is located along the axial direction I1. Above the lower ring portion 370, a ring-shaped track 310 can be formed between the upper ring portion 360 and the lower ring portion 370, and the ring-shaped track 310 can be wound by a tie wire (not shown). The bobbin 300 may further include a plurality of inserting teeth 320 located above the upper ring portion 360 along the axial direction I1, and an inner peripheral surface 350 of the hollow shaft 380 surrounds the shaft center space 340, which can be changed by the inner diameter of the hollow shaft 380 A large-diameter section 342 and a small-diameter section 341 that are connected to each other are formed, and the large-diameter section 342 is located below the small-diameter section 341. The inner peripheral surface 350 of the hollow shaft column 380 may include an outer expansion area 351 and a straight area 352. Both the outer expansion area 351 and the straight area 352 are located in the large diameter section 342. The bobbin 300 may further include a lower opening 330 to communicate with the shaft center space. 340.

The detent unit 400 includes a ring-shaped body 440, a first holding portion 410, a second holding portion 420, three guiding portions 430, three spur arms 450, three clamping portions 460, a plurality of clamping teeth 470, and a center hole 480 and two bumps 491, 492. The central hole 480 is located at the center of the ring body 440, and the guiding portion 430 is a helical tooth structure protruding outward from the ring body 440 and is used for coupling with the knob 500. The first holding portion 410 and the second holding portion 420 protrude inward from the annular body 440, and the first holding portion 410 and the second holding portion 420 each include a free end 411, 421, the free end 411, 421 can be Move in the radial direction and reset after the external force is relieved. The two protrusions 491 and 492 protrude inward from the annular body 440, and there is a space between the two protrusions 491 and 492 and the two free ends 411 and 421. The ratchet arm 450 includes a distal end 452 and a proximal end 451, the proximal end 451 is connected to the outer surface of the ring body 440, and the distal end 452 is used to detachably engage with the bite tooth 230. The three clamping parts 460 are respectively located on the three spine arms 450. The cogging teeth 470 are located below the annular body 440 and can be selectively engaged with the engaging teeth 320 of the wire reel 300.

The knob 500 includes a guide rail 510, a protrusion 520, a through hole 530, and two positioning blocks 540. The guide rail 510 is provided on an inner wall of the knob 500, and the protrusion 520 protrudes toward the inner space 240 along the axial direction I1. The through hole 530 penetrates the convex column 520, and the two positioning blocks 540 are symmetrically arranged on the outer side of the convex column 520 along the radial direction. It should be particularly noted that in Figure 3, only one positioning block 540 can be seen due to viewing angle factors, but the reader can know that there is another positioning block 540 on the side that is not visible from the viewing angle.

The connecting unit 600 includes a first component group (not labeled) and a second component group (not labeled). The first component group is connected to the knob 500, and the second component group penetrates the axial space 340 to connect to the first component group. And the second component group is restricted by the large diameter section 342. In the first embodiment, the first component group of the connecting unit 600 includes a screw 610, and the second component group includes a connecting sleeve 620. The connecting sleeve 620 includes a top portion 622 and a cylindrical portion 621. The cylindrical portion 621 is connected to the top portion. 622, the barrel portion 621 passes through the small diameter section 341 and is locked by the screw 610, and the top portion 622 is limited to the large diameter section 342.

In more detail, when the wire reel 300 is inserted into the internal space 240 from below the ring wall 220, as shown in Figure 4, the upper ring portion 360 and the lower ring portion 370 are restricted by the stop portion 250 and the inner ring recess 260, respectively. Therefore, the wire reel 300 cannot be detached from above the ring wall 220. The guiding part 430 (see Fig. 3) is coupled to the guiding rail 510 to connect the knob 500 and the detent unit 400, and the protrusion 520 of the knob 500 protrudes into the central hole 480 of the detent unit 400 (see Fig. 2) .

The connecting sleeve 620 can be inserted into the axial space 340 from the bottom to the top through the lower opening 330 of the wire reel 300 (see Figure 3). Due to the diameter relationship of the small diameter section 341, the large diameter section 342, the top 622 and the barrel 621, The cylinder 621 can pass through the small diameter section 341, and the top 622 is left in the large diameter section 342. At this time, as long as the screw 610 is locked into the barrel 621, the knob 500 and the detent unit 400 can be combined with the wire reel 300. And because of the stopper portion 250, after the screw 610 is locked into the barrel portion 621, the knob 500, the detent unit 400, the wire reel 300, and the ring wall 220 cannot be separated, and the assembly can be completed. In other embodiments, the stopper may not be provided, but the bite teeth protrude toward the inner space to prevent the wire reel from escaping from above the ring wall; or the stopper and the inner ring are recessed on the ring wall. , Not limited to the above disclosure.

Preferably, the cylindrical portion 621 can be fitted with the protruding column 520 so that the connecting sleeve 620 and the knob 500 can move simultaneously. Wherein, the shape of the outer wall of the barrel portion 621 can be matched with the inner wall of the through hole 530, so that the barrel portion 621 can be fitted into the boss 520. Preferably, the outer wall section of the barrel portion 621 and the inner wall section of the through hole 530 are both It is non-circular. When the tether is pulled to rotate the spool 300 in the release direction A1, the spool 300 may rub against the second component group. If the barrel portion 621 of the second component group is fitted with the boss 520, it can help prevent the second component The group is affected by friction to produce rotation, thereby avoiding the locking separation between it and the first component group.

As shown in Figure 4, the detent unit 400 is located at the first position, the cogging teeth 470 of the detent unit 400 engages with the engaging teeth 320 of the wire reel 300, and the distal end 452 of the ratchet arm 450 (see Figure 2) Engaged with the occlusal tooth 230 in the release direction A1 (see Figure 2), the distal end 452 of the ratchet arm 450 is continuously separated from the occlusal tooth 230 in a tightening direction A2 (see Figure 2), and the clamping portion 460 is Because the position is relatively lower than the occlusal teeth 230, there is no meshing with the occlusal teeth 230. Therefore, turning the knob 500 in the tightening direction A2 can drive the detent unit 400 to link the wire reel 300 to take up the wire, and when the knob 500 is not actuated, the distal end 452 of the ratchet arm 450 abuts against the bite teeth 230 to prevent the wire reel 300 from facing Rotation in the release direction A1 can prevent the tether from being released.

Furthermore, rotating the knob 500 in a release direction A1 can drive the detent unit 400 to rise along the axial direction I1, so that the detent unit 400 is separated from the wire reel 300. In more detail, when the detent unit 400 is in the first position, the guiding portion 430 is engaged with the guiding track 510 of the knob 500, and one of the positioning blocks 540 is located between the free end 411 of the first holding portion 410 and the protrusion 491 , The other positioning block 540 is located between the free end 421 of the second holding portion 420 and the protrusion 492. When the knob 500 rotates in the release direction A1, the detent unit 400 cannot rotate together due to the meshing relationship between the ratchet arm 450 and the bite tooth 230. Therefore, the two positioning blocks 540 are pressed against the two free ends 411 and 421, respectively. The ends 411 and 421 are deformed in the radial direction so that the knob 500 can rotate relative to the detent unit 400, and the guide part 430 is guided by the guide rail 510 and can rise in the axial direction I1 relative to the guide rail 510 to switch the detent The unit 400 is located in the second position. At this time, one of the aforementioned positioning blocks 540 is changed to be located between the free end 411 of the first holding portion 410 and the protrusion 492, and the aforementioned other positioning block 540 is changed to be located between the free end 421 of the second holding portion 420 and the protrusion 491. .

Therefore, as shown in FIG. 5, since the detent unit 400 is located in the second position, the interlocking teeth 470 of the detent unit 400 are separated from the engaging teeth 320 of the wire reel 300, and the wire reel 300 is not affected by the detent unit 400 at this time. Influence, and can rotate in the release direction A1, pull the tie line to release the line.

Please refer to FIGS. 6 and 7, where FIG. 6 shows a three-dimensional exploded view of a fastening device 100a according to a second embodiment of the present invention, and FIG. 7 shows an exploded view of the fastening device 100a in FIG. 6 Schematic cross-sectional view. The fastening device 100a includes a housing unit (not labeled), a wire reel 300a, a detent unit 400a, a knob 500a, and a connection unit 600a. The structure and relationship of the housing unit, the wire reel 300a, the detent unit 400a and the knob 500a It is similar to the housing unit 200, the wire reel 300, the detent unit 400 and the knob 500 of the first embodiment, but the structure of the connection unit 600a is different from the connection unit 600 of the first embodiment.

The connecting unit 600a includes a first component group and a second component group 620a. The first component group includes a locking sleeve 610a, and the second component group 620a includes a stop ring 621a and a screw 622a. The stop ring 621a is limited to the large In the diameter section (not marked), the screw 622a passes through the stop ring 621a and the small diameter section (not marked) is locked to the locking sleeve 610a. The locking sleeve 610a includes a lower fitting portion 611a, the stop ring 621a includes an inner fitting groove 6211a, and the inner fitting groove 6211a is fitted with the lower fitting portion 611a. The knob 500a includes a protruding column (not labeled) protruding axially toward the inner space (not labeled), the locking sleeve 610a further includes an upper fitting portion 612a connected to the lower fitting portion 611a, and the upper fitting portion 612a and The convex post is fitted.

In detail, the stop ring 621a further includes a bottom portion 6213a and a body portion 6212a. The body portion 6212a is connected to the bottom portion 6213a, and the inner fitting groove 6211a is located on the body portion 6212a. The shape of the upper fitting portion 612a of the locking sleeve 610a is matched with the through hole (not marked) located in the boss, and the shape of the lower fitting portion 611a is matched with the inner fitting groove 6211a. Therefore, when the locking sleeve 610a passes through When entering the through hole, the upper fitting portion 612a is fitted with the convex post, and the lower fitting portion 611a is exposed on the convex post and protrudes into the small diameter section.

In addition, as shown in Figure 7, the body 6212a of the stop ring 621a enters the small-diameter section, the inner fitting groove 6211a is fitted with the lower fitting section 611a, and the bottom 6213a is left in the large-diameter section and is restricted by the large-diameter section. , And the screw 622a can be locked into the locking sleeve 610a from bottom to top along the axial direction to complete the combination of the knob 500a, the detent unit 400a, the wire reel 300a and the ring wall 220a. When the wire reel 300a rotates in the release direction due to the pulling of the tie wire, the reel 300a may rub against the second component group 620a, because the stop ring 621a of the second component group 620a fits with the boss through the locking sleeve 610a, This helps prevent the second component group 620a from rotating due to friction, thereby avoiding the locking separation between it and the first component group.

Please refer to Figures 8 and 9, where Figure 8 shows a three-dimensional exploded view of a fastening device 100b according to a third embodiment of the present invention, and Figure 9 shows a part of the fastening device 100b of Figure 8 Schematic cross-sectional view. The fastening device 100b includes a housing unit (not labeled), a wire reel 300b, a detent unit 400b, a knob 500b, and a connecting unit 600b. The structure and relationship of the housing unit, the wire reel 300b, the detent unit 400b and the knob 500b It is similar to the housing unit, bobbin 300a, detent unit 400a, and knob 500a of the second embodiment in FIG. 6, but the structure of the connecting unit 600b is different from the connecting unit 600a of the second embodiment.

More specifically, the first component group of the connecting unit 600b includes a locking sleeve 610b, and the second component group 620b includes a stop ring 621b and a screw 622b. The structure of the locking sleeve 610b is similar to that of the second embodiment. The locking sleeve 610a is the same, but it can also not include the lower fitting part, but lengthen the length of the upper fitting part in the axial direction so that it protrudes into the small diameter section, including but not limited to the above disclosure. In the third embodiment, the stop ring 621b has an annular structure, and the locking sleeve 610b includes a lower end surface 611b. After the screw 622b is locked into the locking sleeve 610b, the stop ring 621b can press against the lower end surface 611b. This completes the assembly of the knob 500b, the detent unit 400b, the wire reel 300b and the ring wall 220b. When the wire reel 300b rotates in the release direction due to the pulling of the tether, the wire reel 300b may rub the second component group 620b, because the stop ring 621b is pressed against the lower end surface 611b by the screw 622b, the stop ring 621b, the screw The frictional force between the 622b and the lower end surface 611b is greater than the frictional force of the bobbin 300b friction stop ring 621b, which can help prevent the second component group 620b from rotating due to friction, thereby avoiding the friction between the second component group 620b and the first component group. Locked and separated.

Please refer to Figures 10 and 11, where Figure 10 shows a three-dimensional exploded view of a fastening device 100c according to a fourth embodiment of the present invention, and Figure 11 shows a part of the fastening device 100c of Figure 10 Schematic cross-sectional view.

The fastening device 100c includes a housing unit (not shown), a wire reel 300c, a detent unit 400c, a knob 500c, and a connecting unit 600c. The structure of the housing unit, the wire reel 300c, the detent unit 400c and the knob 500c and The relationship is similar to that of the housing unit, the wire reel 300b, the detent unit 400b, and the knob 500b of the third embodiment, but the structure of the connection unit 600c is different from the connection unit 600b of the third embodiment.

More specifically, the first component group of the connecting unit 600c includes a locking sleeve 610c, and the second component group includes a screw 620c. The screw 620c includes a head 622c and a rod 621c. The rod 621c is connected to the head 622c. The rod portion 621c penetrates through the axial space to be locked to the locking sleeve 610c, and the head portion 622c is restricted by the large-diameter section. In terms of structural configuration, the diameter of the head 622c can be larger than the diameter of the small diameter section, and the diameter of the screw 620c can be smaller than the diameter of the large diameter section, and the screw 620c can be confined to the large diameter section to complete the knob 500c and the detent unit Assembly of 400c, bobbin 300c and ring wall 220c. When the tie wire is pulled to rotate the wire reel 300c in the release direction, the wire reel 300c may rub against the second component group. When the screw 620c is locked, the locking force between the screw 620c and the locking sleeve 610c can be strengthened, for example, The method of widening the thread, dispensing, etc. can be used to make the locking force between the screw 620c and the locking sleeve 610c greater than the friction force of the spool 300c against the screw 620c, which can help prevent the second component group from being affected by friction Rotation is generated, thereby avoiding the locking separation between it and the first component group.

In other embodiments, the connecting unit may also have a convex column structure, which may be integrally connected to the knob and protrude toward the axial space, or be fixed to the knob by gluing. The connecting unit may include a lower flange. The upper end of the connecting unit is connected to the knob and the lower flange is limited to the large diameter section to complete the assembly of the knob, the detent unit, the wire reel and the ring wall.

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

100, 100a, 100b, 100c: fastening device 200: housing unit 210: Base 220, 220a, 220b, 220c: ring wall 230: occlusal teeth 240: internal space 250: Stop 260: inner ring concave 300, 300a, 300b, 300c: wire reel 310: circular track 320: Mosaic teeth 330: lower opening 340: Axial Space 341: Trail Section 342: Large Diameter Section 350: inner peripheral surface 351: Outer Expansion Area 352: Straight Face Zone 360: Sheung Wan 370: Lower Ring 380: Hollow shaft column 400, 400a, 400b, 400c: detent unit 410: The first holding part 411,421: free end 420: second holding part 430: Guiding Department 440: Ring body 450: thorny arm 451: Near End 452: remote 460: Card Department 470: cocking teeth 480: Center hole 491,492: bump 500, 500a, 500b, 500c: knob 510: Guidance Track 520: convex column 530: Through hole 540: positioning block 600, 600a, 600b, 600c: connection unit 610, 622a, 622b, 620c: screw 610a, 610b, 610c: locking sleeve 611a: Lower fitting part 611b: Lower end face 612a: upper fitting part 620: connecting sleeve 620a, 620b: second component group 621: Tube 621a, 621b: stop ring 621c: pole 622c: head 6211a: Internal fitting groove 6212a: body 6213a: bottom 622: top A1: Release direction A2: Tightening direction I1: Axial

Figure 1 is a perspective view of a fastening device according to a first embodiment of the present invention; Figure 2 shows an exploded schematic diagram of the fastening device of Figure 1; Figure 3 shows another exploded schematic diagram of the fastening device of Figure 1; Figure 4 shows a schematic cross-sectional view of the fastening device of Figure 1; Figure 5 shows another schematic cross-sectional view of the fastening device of Figure 1; Figure 6 is a three-dimensional exploded schematic diagram of a fastening device according to a second embodiment of the present invention; Figure 7 shows a schematic cross-sectional view of the fastening device of Figure 6; Figure 8 is a three-dimensional exploded schematic diagram of a fastening device according to a third embodiment of the present invention; Figure 9 shows a schematic cross-sectional view of the fastening device of Figure 8; Figure 10 is a three-dimensional exploded schematic diagram of a fastening device according to a fourth embodiment of the present invention; and Fig. 11 shows a schematic cross-sectional view of the fastening device of Fig. 10.

100: Fastening device

200: housing unit

210: Base

220: Ring Wall

230: occlusal teeth

250: Stop

260: inner ring concave

300: wire reel

310: circular track

320: Mosaic teeth

340: Axial Space

341: Trail Section

342: Large Diameter Section

350: inner peripheral surface

351: Outer Expansion Area

352: Straight Face Zone

360: Sheung Wan

370: Lower Ring

380: Hollow shaft column

400: Control unit

440: Ring body

450: thorny arm

460: Card Department

470: cocking teeth

500: knob

510: Guidance Track

520: convex column

530: Through hole

600: connection unit

610: Screw

620: connecting sleeve

621: Tube

622: top

I1: Axial

Claims (11)

A fastening device includes: a housing unit; a ring wall surrounding an internal space; and a base for the ring wall to be installed; a wire reel located in the internal space and including an axial center space; and a detent unit located in the The internal space selectively blocks the reel from rotating in a release direction; a knob covering the ring wall; and a connecting unit penetrating the shaft space and connecting the knob to limit the ring wall and the ring wall. The wire reel, the detent unit and the knob; wherein, the base does not directly contact the connecting unit. The fastening device according to claim 1, wherein the axial space includes a large-diameter section and a small-diameter section, and the small-diameter section is connected to the large-diameter section in an axial direction. The fastening device according to claim 2, wherein the connecting unit includes: a first component group connected to the knob; and a second component group passing through the axial space to connect to the first component group, And the second component group is restricted by the large diameter section. The fastening device according to claim 3, wherein the first The component set includes a screw, the second component set includes a connecting sleeve, the connecting sleeve includes a top and a barrel, the barrel is connected to the top, the barrel passes through the small diameter section and is used for the screw lock Then, the top is limited to the large diameter section. The fastening device according to claim 4, wherein the knob includes a protruding column protruding toward the inner space along the axial direction, and the cylindrical portion is fitted with the protruding column so that the connecting sleeve and the knob are the same move. The fastening device according to claim 3, wherein the first component group includes a locking sleeve, the second component group includes a stop ring and a screw, and the stop ring is limited to the large diameter section, The screw passes through the stop ring and the small diameter section to be locked to the locking sleeve. The fastening device according to claim 6, wherein the locking sleeve includes a lower inserting portion, and the stop ring includes an inner inserting groove, and the inner inserting groove is engaged with the lower inserting portion. The fastening device according to claim 7, wherein the knob includes a protrusion protruding toward the inner space along the axial direction, the locking sleeve includes an upper fitting portion connected to the lower fitting portion, and the The upper fitting part is fitted with the convex post. The fastening device according to claim 6, wherein the locking The shaft sleeve includes a lower end surface. After the screw rod is locked into the locking shaft sleeve, the stop ring is pressed against the lower end surface. The fastening device according to claim 3, wherein the first component group includes a locking sleeve, the second component group includes a screw, the screw includes a head and a rod, and the rod is connected to the The head, the rod part penetrates the shaft center space to be locked to the locking sleeve, and the head is restricted by the large-diameter section. The fastening device according to claim 3, wherein the housing unit further comprises: an inner ring recess, which is recessed at the lower end of the ring wall to limit the wire reel.

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