TWM509278U - Rotary fastener set with safety device - Google Patents

Description

Rotating fastener set with safety device

The present invention relates to a rotating fastener set, and more particularly to a rotating fastener set with a safety device.

Referring to FIGS. 1 and 2, a rotating fastener set includes a female fastener 5 and a male fastener 6. The female fastener 5 includes a wall 51 defining a coupling hole 52. The coupling hole 52 extends through the wall 51 and has a non-circular cross section. The male fastener 6 includes a base surface 61, a cylindrical portion 62 extending upward from the base surface 61, and a cylindrical portion 62 extending radially outwardly and engaging the cross section with the coupling hole 52. Part 63. The engaging portion 63 cooperates with the base surface 61 to define an embedded space 631 into which the wall 51 can be embedded. When the engaging portion 63 passes through the coupling hole 52 and the base surface 61 abuts against the plate wall 51, the male fastening member 6 is rotated at an angle to a connecting position to cause the wall 51 to be embedded in the embedded space 631. Inside. The male fastener 6 is rotated at an angle to a separated position so that the engaging portions 63 correspond to the coupling holes 52 to be separated from each other.

The rotating fastener set can be used for connecting two objects, for example, the female fastening component 5 is integrally formed on a back cover 7 for electronic mobile device installation, and the male fastening component 6 is connected with a sports strap 8 by The male fastener 6 is rotatably fastened to the female fastener 5 to connect the back cover 7 to the strap 8 for convenient use by the user. While wearing the strap 8 for exercise, the electronic activity device can also be used to record the exercise history. However, the rotating fastener group cannot maintain the male fastener 6 in the connecting position, and the male fastener 6 can be easily rotated from the connecting position by inadvertent collision or external force by a slight accident. Up to the separation position, the back cover 7 is separated from the strap 8, and at this time, the electronic mobile device is likely to be damaged as the back cover 7 is dropped on the ground.

Therefore, the purpose of the novel is to provide a A rotating fastener set with a safety device that increases the safety of the connection state.

Thus, the present invention has a rotating device set with a safety device, including A female fastener, a male fastener unit, and a safety device. The female fastener includes a wall defining a coupling hole. The wall has oppositely disposed one of the first surface and a second surface. The bonding hole extends through the first and second surfaces and has a non-circular cross section. The male fastener unit is rotatable relative to the female fastener between a connecting position and a separated position, and includes a positioning member and a clamping member disposed on the positioning member. The positioning member defines an accommodation space and has a top surface. The clamping member has a cylindrical portion extending upward from the top surface, and an engaging portion extending radially outward from the cylindrical portion and having a cross section matching the coupling hole. The engaging portion cooperates with the top surface to define an embedded space in which the wall can be embedded. When the engaging portion passes through the coupling hole to correspond to the first surface, and the top surface abuts against the second surface, the male fastener unit is rotated at an angle to the connecting position to cause the wall to be embedded in the insert The space is disposed, and the card member separates the joint hole from the plurality of fixed spaces. Rotate the male fastener The unit is angled to the separated position such that the engaging portions are coupled to the holes to be separated from each other. The safety device is disposed in the accommodating space and includes a tooth unit and an elastic unit connected between the tooth unit and the positioning member. The elastic unit causes the tooth unit to have a potential energy that moves toward the card member. In the connected position, the tooth unit passes through one of the fixing spaces to limit the male fastener unit without rotating relative to the female fastener to the separated position.

The effect of the novel is by the safety device at the connection position The male fastener unit is not limited to rotate relative to the female fastener to the separated position, and the male fastener unit can be maintained at the connecting position, and is not easily separated from the female fastener to increase safety. .

1‧‧‧Back cover

11‧‧‧ base wall

12‧‧‧Wall

13‧‧‧Device space

2‧‧‧Female fasteners

21‧‧‧ siding

211‧‧‧ first surface

212‧‧‧ second surface

213‧‧‧ Limit bumps

22‧‧‧Combination hole

221‧‧‧ round hole

222‧‧‧wing hole

223‧‧‧Fixed space

3‧‧‧ Male fastener unit

31‧‧‧ Positioning parts

310‧‧‧floor

311‧‧‧Substrate

312‧‧‧ bottom cover

313‧‧‧ top surface

314‧‧‧ bottom

315‧‧‧ accommodating space

316‧‧‧Perforation

317‧‧‧Base

318‧‧‧ Connecting rod

319‧‧‧ week board

32‧‧‧Card parts

320‧‧‧ openings

321‧‧‧Cylinder

322‧‧‧Interface

323‧‧‧wing area

324‧‧‧ Groove area

325‧‧‧ embedded space

33‧‧‧Tie straps

34‧‧‧ fixed seat

341‧‧‧Sucker

4‧‧‧Safety device

41‧‧‧Connecting plate

411‧‧‧Connecting Department

412‧‧‧ Drive Department

413‧‧‧ tooth plate department

414‧‧‧ poles

415‧‧‧Drive Board

416‧‧‧ Pulling the wall area

417‧‧‧Sliding wall area

418‧‧‧Spring space

42‧‧‧ tooth unit

421‧‧‧Limited teeth

422‧‧‧ first side edge

423‧‧‧Second side

424‧‧‧ upper surface

43‧‧‧elastic unit

44‧‧‧Connecting piece

441‧‧‧ half

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is an exploded perspective view showing a conventional rotating fastener set; FIG. 2 is a stereoscopic combination of the prior art. FIG. 3 is a perspective exploded view showing a first preferred embodiment of the present invention with a rotating fastener set; FIG. 4 is a perspective assembled view of the first preferred embodiment; FIG. A first plan view of a first preferred embodiment illustrates a male fastener unit rotated to a joint position; and FIG. 6 is a cross-sectional view of the VI-VI cut line of FIG. 5 illustrating a safety device at the joint position; FIG. Figure 5 is a cross-sectional view of the VII-VII cut line, in which the wall is embedded in an embedded space; Figure 8 is a cross-sectional view of the VIII-VIII cut line of Figure 5, illustrating the construction of a tooth unit; Figure 9 is a plan view of the first preferred embodiment illustrating the male fastener unit rotated from the joint position to a Figure 10 is a cross-sectional view of the XX cut line in Figure 9, illustrating the tooth unit is depressed by the wall; Figure 11 is a cross-sectional view of the XI-XI cut line of Figure 9, illustrating the tooth unit being the wall Figure 12 is a plan view of the first preferred embodiment illustrating the rotation of the male fastener unit to the disengaged position; Figure 13 is an exploded perspective view showing one of the rotating fastener sets of the present invention with a safety device FIG. 14 is a perspective view of a second preferred embodiment of the second preferred embodiment; FIG. 15 is a plan view of the second preferred embodiment illustrating a male fastener unit rotated to a connected position; 16 is a cross-sectional view of the XVI-XVI cut line in FIG. 15 illustrating a safety device in the connected position; FIG. 17 is a view similar to FIG. 16 illustrating that the two driving portions are depressed to cause a tooth unit to be disengaged from a fixed position. Space; Figure 18 is an exploded perspective view of the new type of safety device A third preferred embodiment of the fastener set; FIG. 19 is a perspective assembled view of the third preferred embodiment; FIG. 20 is a plan view of the third preferred embodiment, illustrating a male fastener unit rotated to a connection location; Figure 21 is a cross-sectional view of the XXI-XXI cut line of Figure 20, illustrating a safety device in the connected position; and Figure 22 is a partial enlarged view of the Figure 21, illustrating a drive plate portion being pulled such that a tooth unit Get out of a fixed space.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIGS. 3-6, a first preferred embodiment of the present invention has a back cover 1, a female fastener 2, a male fastener unit 3, and a security device 4.

The back cover 1 includes a base wall 11 and a peripheral wall 12 extending from the periphery of the base wall 11. The base wall 11 cooperates with the peripheral wall 12 to define a device space 13 for mounting the electronic mobile device.

The female fastener 2 is integrally formed on the base wall 11 of the back cover 1 and includes a wall 21 defining a coupling hole 22. The wall 21 has a first surface 211 and a second surface 212 oppositely disposed, and a limiting protrusion 213 extending upward from the first surface 211. The coupling hole 22 extends through the first and second surfaces 211 and 212 and has a non-circular cross section and has a circular hole portion 221, and two pairs of spaces are disposed and respectively extended radially outward by the circular hole portion 221 Wing hole portion 222. The wing holes 222 are disposed adjacent to the limit protrusions 213, respectively.

The male fastener unit 3 is rotatable relative to the female fastener 2 between a connecting position (as shown in FIG. 5) and a separated position (FIG. 12), and includes a positioning member 31 integrally disposed on the positioning member. Card member 32 on 31, And a strap 33 that connects the positioning member 31 and can adjust the ring diameter.

The positioning member 31 has a substrate 311 and a bottom cover 312. The substrate 311 has a top surface 313, a bottom surface 314 opposite to the top surface 313, and an accommodating space 315 extending upward from the bottom surface 314. The top surface 313 forms a through hole 316 that communicates with the accommodating space 315. The bottom cover 312 removably closes the accommodating space 315.

The engaging member 32 has a cylindrical portion 321 extending upward from the top surface 313 and corresponding to the circular hole portion 221, and an engaging portion 322. The engaging portion 322 has a cross section that cooperates with the coupling hole 22 and has two pairs of wing regions 323 respectively corresponding to the wing holes 222 and extending radially outward from the cylindrical portion 321 . The wing regions 323 cooperate with the cylindrical portion 321 to define recessed regions 324 that are circumferentially spaced apart and respectively correspond to the perforations 316. The wing regions 323 cooperate with the top surface 313 to define an embedded space 325 into which the wall 21 can be embedded.

Referring to FIG. 5, FIG. 7 and FIG. 12, when the engaging portion 322 passes through the coupling hole 22 to correspond to the first surface 211, and the top surface 313 abuts against the second surface 212, the male fastener unit is rotated. 3, the angle to the connection position ( FIG. 5 ) and the wing regions 323 of the engaging portion 322 are respectively restricted by the limiting protrusions 213 , and the wall 21 is embedded in the embedded space 325 . The card member 32 separates the coupling hole 22 from the four fixing spaces 223. The male fastener unit 3 is rotated at an angle to the separated position (as shown in FIG. 12) such that the engaging portions 322 correspond to the coupling holes 22 to be separated from each other. In the present embodiment, the fixed spaces 223 are the wing holes 222.

Referring to FIG. 5, FIG. 6, and FIG. 8, the safety device 4 is disposed on the The accommodating space 315 includes a connecting plate 41, a tooth unit 42, and an elastic unit 43 connected between the connecting plate 41 and the bottom cover 312. The tooth unit 42 has three limit teeth 421 corresponding to the three through holes 316, respectively. Each of the limiting teeth 421 extends upward from the connecting plate 41 and protrudes upwardly from the corresponding through hole 316, and is connected to the elastic unit 43 through the connecting plate 41, and has a circumferential direction along the cylindrical portion 321 Conversely, one of the first side edge 422 and the second side edge 423 is disposed, and a first side edge 422 extends toward the second side edge 423 and the height substantially decreases the upper surface 424. The elastic unit 43 causes the tooth unit 42 to have a potential energy that moves toward the card member 32. In the connected position, the limiting teeth 421 of the tooth unit 42 pass through the three fixing spaces 223 to limit the male fastener unit 3 without rotating relative to the female fastening member 2 to the separated position.

Referring to FIG. 10 and FIG. 12, therefore, the female fastener 2 is to be When the male fastener unit 3 is connected, the engaging portion 322 is first passed through the coupling hole 22 to correspond to the first surface 211, and the top surface 313 is abutted against the second surface 212. It can be noted that, at this time, the limiting teeth 421 are pressed against the second surface 212 and move downward against the elastic force of the elastic unit 43, and the upper surfaces 424 are aligned with the top surface 313. .

Next, the male fastener unit 3 is rotated from the position of FIG. 12 to the position of FIG. Due to the arrangement of the limiting protrusions 213, the male fastener unit 3 can only be rotated by an angle with respect to the female fastening member 2 in a counterclockwise direction, and until the wing regions 323 of the engaging portions 322 are respectively The limiting block 213 is in the position of the connecting position ( FIG. 5 ), and the wall 21 is embedded in the embedded space 325 , and the engaging member 32 defines the coupling hole 22 . The fixed spaces 223 are separated. The fixed spaces 223 correspond to the perforations 316, respectively. It can be noted that, at this time, the limiting teeth 421 are also interlocked with the pressing of the second surface 212 along with the rotation of the male fastener unit 3, and the tooth unit 42 is caused by the elastic unit 43. With the potential energy moving toward the clamping member 32, the limiting teeth 421 will move upward and reset, and pass through three of the fixing spaces 223 to limit the male fastener unit 3 without rotating relative to the female fastening member 2. To the separation position.

Referring to FIG. 8, FIG. 9 and FIG. 11, the male fastener unit 3 is to be used. When the connecting position is rotated to the separated position, the male fastener unit 3 can only be rotated by an angle in a clockwise direction with respect to the female fastening member 2 due to the arrangement of the limiting projections 213. During the rotation in the clockwise direction, the initial stage of the rotation may cause a feeling of jamming due to the side of the tooth unit 42 interfering with the panel wall 21. At this time, the urging force is further enhanced, and the upper surface 424 of the tooth unit 42 is further enhanced. The limiting teeth 421 can be moved downward and resist the elastic force of the elastic unit 43 by being slid and aligned to the second surface 212 of the wall 21 respectively. The corresponding fixed space 223 is lost, and the function of the male fastener unit 3 not being rotated relative to the female fastener 2 to the separated position is lost.

Referring to FIG. 10 and FIG. 12, then, the clockwise rotation can be smoothly continued, and when the engaging portion 322 corresponds to the coupling hole 22, the separation position is reached. At this time, the female fastener 2 is reached. The male fastener unit 3 can be separated from each other.

Referring to FIG. 4, in this embodiment, when the user is exercising, The strap 33 is fastened to the arm and is secured by the female fastener 2 and the male fastener The back cover 1 is coupled to the strap 33 so as to facilitate the user to record the exercise history while using the electronic mobile device.

Therefore, the limit position of the safety device 4 at the connection position The male fastener unit 3 is not rotated relative to the female fastener 2 to the separated position, so that the male fastener unit 3 can be maintained in the connected position, and is not easily loosened and separated from the female fastener 2 safety.

Referring to Figures 13 to 16, the present invention has a rotation buckle for a safety device The second preferred embodiment of the kit is similar to the first preferred embodiment in that the male fastener unit 3 and the safety device 4 are constructed.

The male fastener unit 3 is rotatable relative to the female fastener 2 between a connecting position and a separated position, and includes a positioning member 31, a clamping member 32 integrally disposed on the positioning member 31, and a The positioning member 31 is pivotally connected and has a fixing seat 34 of a suction cup 341.

The positioning member 31 has a base plate 311, a base 317 which is spherical and pivotally connected to the fixed base 34, and a connecting rod 318 connected between the base plate 311 and the base 317. The substrate 311, the base 317 and the connecting rod 318 cooperate to define a receiving space 315 which is a circumferential space. The substrate 311 has a top surface 313. The top surface 313 forms a through hole 316 that communicates with the accommodating space 315. In this embodiment, the base 317 and the fixing base 34 are pivotally connected to the universal joint.

The connecting plate 41 has a connecting portion 411 and a pair of driving portions 412 respectively disposed on opposite sides of the connecting portion 411. In the present embodiment, the connecting plate 41 is assembled from a pair of connecting pieces 44. Each connecting piece 44 has half a portion 441, and a drive portion 412 thereof. The halves 441 are connected and cooperate to define the connecting portion 411.

The elastic unit 43 is sleeved outside the connecting rod 318 and connected between the connecting portion 411 and the base 317.

The tooth unit 42 has two limit teeth 421 corresponding to the two through holes 316, respectively. Each of the limiting teeth 421 extends upward from the connecting portion 411 and protrudes upwardly from the corresponding through hole 316 , and is connected to the elastic unit 43 through the connecting portion 411 . In the connected position, the limiting teeth 421 of the tooth unit 42 pass through the two fixing spaces 223 to limit the male fastener unit 3 without rotating relative to the female fastening member 2 to the separated position.

Referring to FIG. 12, FIG. 15, and FIG. 17, when the female fastener 2 is to be connected to the male fastener unit 3, the driving portions 412 are first pressed to resist the elastic force of the elastic unit 43, The limit teeth 421 are moved downwards in a row until the limit teeth 421 are respectively recessed in the corresponding through holes 316.

Then, the engaging portion 322 passes through the coupling hole 22, and the male fastener unit 3 is rotated at an angle with respect to the female fastening member 2, and until the wing regions 323 of the engaging portion 322 are respectively subjected to the The equal-limit bump 213 is limited, and the connection position is reached at this time, and the wall 21 is embedded in the embedded space 325 (not shown, similar to the symbol 21 in FIG. 7), and the card is formed. The member 32 separates the coupling hole 22 from the fixed spaces 223. The fixed spaces 223 correspond to the perforations 316, respectively.

Referring to FIGS. 15 and 16, then, the driving portions 412 are relaxed, and the tooth unit 42 is moved toward the engaging member 32 by the elastic unit 43. The potential energy causes the limit teeth 421 to move upward and reset, and passes through the two fixed spaces 223 to limit the male fastener unit 3 without rotating relative to the female fastener 2 to the separated position.

Referring to FIG. 12, FIG. 15, and FIG. 17, when the male fastener unit 3 is to be rotated from the connection position (FIG. 15) to the separated position (as shown in FIG. 12), the driving portions 412 are first pressed to resist The elastic force of the elastic unit 43 causes the limiting teeth 421 to move downwardly, until the limiting teeth 421 are respectively recessed in the corresponding through holes 316, and are respectively separated from the corresponding fixed spaces 223, and The effect of the male fastener unit 3 not being rotated relative to the female fastener 2 to the separated position is lost. Then, the male fastener unit 3 is rotated at an angle with respect to the female fastener 2, and is rotated until the engaging portion 322 corresponds to the coupling hole 22, that is, the separation position is reached. At this time, the female fastening component 2 and the The male fastener units 3 can be separated from each other.

Referring to FIG. 14 , in the embodiment, the fixing seat 34 can be affixed to the front windshield of the automobile through the suction cup 341 , and the female fastening member 2 can be engaged with the male fastening unit 3 . The back cover 1 is connected to the fixing base 34. In this way, the user can conveniently use the electronic mobile device to perform navigation, call, and other multimedia functions during the travel of the vehicle.

Thus, the second preferred embodiment can achieve the same objects and effects as the first preferred embodiment described above.

Referring to Figures 18 to 21, the present invention has a rotation buckle for a safety device. The third preferred embodiment of the kit is similar to the second preferred embodiment in that the male fastener unit 3 and the safety device 4 are constructed.

The male fastener unit 3 can be in a connected position with the female fastener 2 Rotating from the position, and comprising a positioning member 31, a clamping member 32 disposed on the positioning member 31, and a fixing seat 34 pivotally connected to the positioning member 31.

The positioning member 31 has a substrate 311, a peripheral plate 319 extending downward from the substrate 311, a bottom plate 310 connecting the free ends of the peripheral plate 319, and an opening 320 formed in the bottom plate 310. The substrate 311, the peripheral plate 319 and the bottom plate 310 cooperate to define a receiving space 315 that communicates with the opening 320. The substrate 311 has a top surface 313. The top surface 313 forms a through hole 316 that communicates with the accommodating space 315. In this embodiment, the substrate 311 and the peripheral board 319 and the bottom plate 310 are two components manufactured separately.

The connecting plate 41 has a tooth plate portion 413, a strut portion 414 connected to the tooth plate portion 413 and pivotally connected to the peripheral plate 319 of the positioning member 31, and a tooth plate portion 413 and the tooth plate portion 413 are respectively connected to the strut portion The drive plate portion 415 on the opposite side of the 414. The driving plate portion 415 protrudes from the opening 320 and has a pulling wall region 416 extending outwardly from the strut portion 414 and extending downwardly from the opening 320, and a free end of the pulling wall region 416 The sliding wall region 417 of the opening 320 extends upward. The swaying wall portion 416, the sliding wall portion 417 and the base plate 311 cooperate to define a spring space 418 for receiving the elastic unit 43.

The elastic unit 43 is disposed in the spring space 418 and is connected between the clamping wall region 416 and the substrate 311. In the present embodiment, the elastic unit 43 is a torsion spring.

The tooth unit 42 extends upward from the tooth plate portion 413 and protrudes upwardly from the through hole 316 and is connected to the elastic unit 43 through the connecting plate 41. In the connecting position, the tooth unit 42 passes through one of the fixing spaces 223 to limit the male fastener unit 3 without rotating relative to the female fastening member 2 to the separation position. Set.

Referring to FIG. 22, when the female fastener 2 is to be connected to the male fastener unit 3, the driving plate portion 415 is firstly pulled to resist the elastic force of the elastic unit 43, so that the tooth unit 42 is tilted. The rocker is moved in the same manner and downwardly until the tooth unit 42 is recessed in the through hole 316.

Referring to FIG. 20 and FIG. 21, the engaging portion 322 is passed through the coupling hole 22, and the male fastener unit 3 is rotated to the connecting position, so that the wall 21 is embedded in the embedded space 325 (Fig. Not shown, similar to the reference numeral 21 of FIG. 7), and the card member 32 separates the coupling hole 22 from the fixed spaces 223. One of the fixed spaces 223 corresponds to the perforations 316.

Then, the driving plate portion 415 is loosened, and the tooth unit 42 has the potential energy moving toward the clamping member 32 by the elastic unit 43 to move the tooth unit 42 upward and reset, and pass through the corresponding fixed space. 223 is to limit the male fastener unit 3 without rotating relative to the female fastener 2 to the separated position.

Referring to FIG. 12, FIG. 20 and FIG. 22, when the male fastener unit 3 is rotated from the connection position (as shown in FIG. 20) to the separated position (as shown in FIG. 12), the driving plate portion 415 needs to be firstly pulled to resist The elastic force of the elastic unit 43 causes the tooth unit 42 to move downwardly, until the tooth unit 42 is recessed in the through hole 316, and is separated from the corresponding fixed space 223, and the male fastener unit is lost. 3 does not rotate relative to the function of the female fastener 2 to the separated position. Then, the male fastener unit 3 is rotated to the separated position, and at this time, the female fastener 2 and the male fastener unit 3 can be separated from each other.

Referring to FIG. 19, in the embodiment, the fixing base 34 can be locked on the bicycle frame or the handle, and the female fastening member 2 and the male fastening unit 3 are The back cover 1 can be connected to the fixed seat 34 by being fastened, so that the user can conveniently use the electronic mobile device to perform navigation, calling, and the like while riding the bicycle.

Thus, the third preferred embodiment can achieve the same objects and effects as the second preferred embodiment described above.

In summary, when the safety device 4 is in the connected position Retaining the male fastener unit 3 without rotating relative to the female fastener 2 to the separated position, the male fastener unit 3 can be maintained in the connected position, and is not easily separated from the female fastener 2 And to increase the security, it can indeed achieve the purpose of this new type.

However, the above is only the preferred embodiment of the present invention. When it is not possible to limit the scope of the present invention, any simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification are still within the scope of the present patent.

1‧‧‧Back cover

11‧‧‧ base wall

12‧‧‧Wall

2‧‧‧Female fasteners

21‧‧‧ siding

212‧‧‧ second surface

22‧‧‧Combination hole

221‧‧‧ round hole

222‧‧‧wing hole

3‧‧‧ Male fastener unit

31‧‧‧ Positioning parts

311‧‧‧Substrate

312‧‧‧ bottom cover

313‧‧‧ top surface

316‧‧‧Perforation

32‧‧‧Card parts

321‧‧‧Cylinder

322‧‧‧Interface

323‧‧‧wing area

324‧‧‧ Groove area

325‧‧‧ embedded space

33‧‧‧Tie straps

4‧‧‧Safety device

41‧‧‧Connecting plate

42‧‧‧ tooth unit

43‧‧‧elastic unit

Claims (13)

A rotating fastener set with a safety device, comprising: a female fastener, comprising a wall defining a coupling hole, the wall having a first surface and a second surface oppositely disposed, the coupling hole penetrating the first a second surface having a non-circular cross section; a male fastener unit rotatable relative to the female fastener between a joint position and a separate position, and including a positioning member, and a positioning member disposed thereon a clamping member on the piece, the positioning member defines an accommodating space, and has a top surface, the clamping member has a cylindrical portion extending upward from the top surface, and a cylindrical portion radially outward An engaging portion extending and matching with the coupling hole, the engaging portion cooperates with the top surface to define an embedded space into which the wall can be embedded, and when the engaging portion passes through the coupling hole, correspondingly a first surface, and when the top surface abuts against the second surface, the male fastener unit is rotated at an angle to the connecting position to cause the wall to be embedded in the embedded space, and the engaging member connects the engaging hole Separating a plurality of fixed spaces, rotating the male fastener unit to an angle to the point Positioning the pair of engaging portions to be separated from each other by a hole; and a safety device disposed in the receiving space and including a tooth unit and a elasticity connected between the tooth unit and the positioning member a unit, the elastic unit having a potential energy for moving the tooth unit, wherein the tooth unit passes through one of the fixing spaces to limit the male fastener unit without opposing the female fastener Turn to the separation position. The rotary fastener set with a safety device according to claim 1, wherein the safety device further comprises a connecting plate connecting the elastic unit, the tooth unit The connecting plate extends upward and is connected to the elastic unit through the connecting plate. The rotary fastener set with a safety device according to claim 2, wherein the wall further has a limit projection extending upward from the first surface, and the male fastener unit rotates relative to the female fastener When the angle is to the connecting position, the engaging portion is limited by the limiting bump. The rotary fastener set with a safety device according to claim 3, wherein the tooth unit has a first side edge and a second side edge disposed opposite to each other along a ring of the cylindrical portion, and a second side edge One side edge extends toward the second side edge and substantially lowers the upper surface. When the male fastener unit is rotated by an angle relative to the female fastener to the separated position, the upper surface of the tooth unit is by the second The side edges are slid and affixed to the second surface of the wall to disengage the tooth unit from one of the fixed spaces. The rotating fastener set with a safety device according to claim 4, wherein the positioning member has a substrate, and a bottom cover, the substrate has the top surface, and a bottom surface opposite to the top surface The space extends upward from the bottom surface, and the bottom cover removably closes the accommodating space and connects the elastic unit. The rotary fastener set with a safety device according to claim 2, wherein the connecting plate has a connecting portion, and a pair of driving portions respectively disposed on opposite sides of the connecting portion, the tooth unit is connected by the connecting portion Extending upwardly, the driving portions are pressed down to resist the elastic force of the elastic unit, and the tooth unit is disengaged from one of the fixed spaces. A rotary fastener set with a safety device according to claim 6, wherein The positioning member has a base plate, a base, and a connecting rod connected between the base plate and the base. The base plate, the base and the connecting rod cooperate to define the receiving space of the annular space, and the base plate has The top surface of the connecting rod is disposed outside the connecting rod and connected between the connecting plate and the base. The rotating fastener set with a safety device according to claim 2, wherein the connecting plate has a tooth plate portion, a strut portion connecting the tooth plate portion and pivoting the positioning member, and a tooth plate Connected to opposite sides of the strut portion and connected to the driving plate portion of the elastic unit, the tooth unit extends upward from the tooth plate portion, and the driving plate portion is pulled to resist the elastic force of the elastic unit, so that The tooth unit is separated from one of the fixed spaces. The rotary fastener set with a safety device according to claim 8, wherein the positioning member has a base plate, a peripheral plate extending downward from the substrate ring and pivotally connecting the support portion, and a connection to the circumference a bottom plate of the free end of the plate, and an opening formed in the bottom plate and protruding from the driving plate portion, the substrate, the peripheral plate and the bottom plate cooperate to define an accommodating space connecting the opening, the substrate connecting the elastic Unit with this top surface. The rotating fastener set with a safety device according to claim 9, wherein the driving plate portion has a pulling wall portion extending outward from the strut portion and extending downwardly and connecting the elastic unit, and A sliding wall region extending from the free end of the pulling wall region into the opening, the pulling wall region, the sliding wall region and the substrate cooperate to define a spring space for receiving the elastic unit. A rotary fastener set with a safety device according to claim 10, wherein The elastic unit is a torsion spring. The rotary fastener set with a safety device according to any one of claims 1 to 11, wherein the coupling hole has a circular hole portion, and the two pairs are spaced apart and respectively extend radially outward from the circular hole portion. a wing portion corresponding to the circular hole portion, the engaging portion having two pairs of wing regions respectively corresponding to the wing portions and extending radially outward from the cylindrical portion. The rotating fastener set with a safety device according to claim 12, wherein the top surface forms at least one perforation for the tooth unit to protrude upward and communicate with the accommodating space.