CN216241730U

CN216241730U - Fastening assembly and electronic device

Info

Publication number: CN216241730U
Application number: CN202122092439.XU
Authority: CN
Inventors: 陈启伦; 高铭智
Original assignee: Wiwynn Corp
Current assignee: Wiwynn Corp
Priority date: 2021-07-28
Filing date: 2021-08-20
Publication date: 2022-04-08
Anticipated expiration: 2031-08-20
Also published as: TWM623885U

Abstract

A fastening assembly and an electronic device are provided. The fastening assembly comprises a fixing piece, a locking accessory, an operating piece and a torsion limiting mechanism, wherein the locking accessory is rotatably arranged on the fixing piece, the operating piece is rotatably sleeved on the locking accessory, the torsion limiting mechanism is arranged between the locking accessory and the operating piece, and when the operating piece drives the locking accessory to rotate along a locking direction, part of the torsion limiting mechanism is displaced along the radial direction of the fixing piece; the torque force limiting mechanism comprises a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are respectively connected to the locking accessory and the operating piece, and when the operating piece drives the locking accessory to rotate along a locking direction, one of the first abutting portion and the second abutting portion is pushed by the other of the first abutting portion and the second abutting portion to move along the radial direction of the fixing piece. The fastening component can avoid overlarge torsion generated in the locking process of the fastening component and avoid the damage of the first assembly or the separation of the fastening component from the first assembly caused by the overlarge torsion.

Description

Fastening assembly and electronic device

Technical Field

The present disclosure relates to fastening assemblies and electronic devices, and particularly to a fastening assembly with a torque limiting mechanism and an electronic device.

Background

With the development of computer technology and the spread of related knowledge, personal computers and servers are becoming more popular, and more people are willing and expected to purchase parts by themselves to assemble or expand computers or servers. For this reason, most of the commercially available computer circuit boards and chassis, chassis and cover plates, or plastic plates and iron plates are designed to be detachable, so that users can disassemble the computer circuit boards and chassis, chassis and cover plates, or plastic plates and iron plates by themselves to assemble or replace various devices and expansion modules.

Generally, to improve convenience, the two combined members are usually fixed by hand screws so that the user can assemble and disassemble the two combined members in a tool-free manner. However, the use of conventional hand-turned screws actually causes some disadvantages. In detail, when the hand-turning screw is locked manually, it is difficult for the user to control the locking torque. If the hand-turning screw is applied to the combination member of the locking circuit board, the excessive locking torque will damage the circuit board or force the hand-turning screw to fall off from the circuit board. Therefore, how to prevent the hand-turning screw from damaging the assembly member or falling off from the assembly member when locking is one of the problems to be solved by the research and development staff.

Therefore, it is desirable to provide a fastening assembly and an electronic device to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention provides a fastening assembly and an electronic device, which can prevent a hand-rotated screw from damaging a combination member or falling off from the combination member when the hand-rotated screw is locked.

The fastening assembly disclosed by one embodiment of the utility model comprises a fixing piece, a locking piece, an operating piece and a torsion limiting mechanism, wherein the locking piece is rotatably arranged on the fixing piece, the operating piece is rotatably sleeved on the locking piece, the torsion limiting mechanism is arranged between the locking piece and the operating piece, and when the operating piece drives the locking piece to rotate along a locking direction, part of the torsion limiting mechanism is displaced along the radial direction of the fixing piece.

The fastening assembly disclosed in another embodiment of the present invention includes a fixing member, a locking member, an operating member, and a torque limiting mechanism, wherein the locking member is rotatably disposed on the fixing member, the operating member is rotatably sleeved on the locking member, the torque limiting mechanism includes a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are respectively connected to the locking member and the operating member, and when the operating member drives the locking member to rotate along a locking direction, one of the first abutting portion and the second abutting portion is pushed by the other of the first abutting portion and the second abutting portion to displace along a radial direction of the fixing member.

In another embodiment of the present invention, an electronic device includes a first assembly, a second assembly and a fastening assembly. The fastening assembly comprises a fixing piece, a locking accessory, an operating piece and a torsion limiting mechanism, wherein the fixing piece is fixed on the first assembly, the locking accessory is rotatably arranged on the fixing piece and is used for being locked on the second assembly, the operating piece is rotatably sleeved on the locking accessory, the torsion limiting mechanism is arranged between the locking accessory and the operating piece, and when the operating piece drives the locking accessory to rotate along a locking direction, part of the torsion limiting mechanism moves along the radial direction of the fixing piece.

In another embodiment of the present invention, an electronic device includes a first assembly, a second assembly and a fastening assembly. The fastening assembly comprises a fixing piece, a locking accessory, an operating piece and a torsion limiting mechanism, wherein the locking accessory is rotatably arranged on the fixing piece, the operating piece is rotatably sleeved on the locking accessory, the torsion limiting mechanism comprises a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are respectively connected to the locking accessory and the operating piece, and when the operating piece drives the locking accessory to rotate along a locking direction, one of the first abutting portion and the second abutting portion is pushed by the other of the first abutting portion and the second abutting portion to move along the radial direction of the fixing piece.

In another embodiment of the present invention, a fastening assembly includes a fixing member, a locking member, an operating member and a torque limiting mechanism. The lock annex rotationally sets up in the mounting, and the lock annex is rotationally located to the operating part cover, and torque limiting mechanism links up operating part and lock annex, and wherein, when operating part relative lock annex pivoted torsion is less than or equal to torque limiting mechanism's torsion limit upper limit, the operating part passes through torque limiting mechanism and drives the relative mounting of lock annex and rotate, and when operating part relative lock annex pivoted torsion is greater than torque limiting mechanism's torsion limit upper limit, torque limiting mechanism makes the operating part idle running relative to the lock annex.

According to the fastening assembly and the electronic device of the embodiment, the upper limit of the locking torque limit of the fastening assembly is limited by the torque limiting mechanism. When the torque force of the operating part rotating relative to the locking accessory is smaller than or equal to the torque force limit upper limit of the torque force limiting mechanism, the operating part drives the locking accessory to rotate relative to the fixing part through the torque force limiting mechanism, and when the torque force of the operating part rotating relative to the locking accessory is larger than the torque force limit upper limit of the torque force limiting mechanism, the torque force limiting mechanism enables the operating part to idle relative to the locking accessory. Therefore, the excessive torsion generated in the locking process of the fastening assembly can be avoided, and the first assembly is prevented from being damaged or the fastening assembly is prevented from being separated from the first assembly due to the excessive torsion.

The foregoing summary, as well as the following detailed description of the embodiments, is provided to illustrate and explain principles of the present invention and to provide further explanation of the utility model as claimed.

Drawings

Fig. 1 is a schematic cross-sectional view illustrating an electronic device according to a first embodiment of the utility model.

Fig. 2 is an exploded view of an electronic device according to a first embodiment of the utility model.

Fig. 3 shows an exploded view of the fastening assembly of the first embodiment of the present invention.

Fig. 4 shows a side view of a fastening assembly according to a first embodiment of the utility model.

Fig. 5 shows a schematic cross-sectional view of the fastening assembly of the first embodiment of the present invention rotated in an unlocking direction.

FIG. 6 is a cross-sectional view of the first embodiment of the present invention showing the fastening assembly and the second assembly unlocked.

Fig. 7 shows a schematic cross-sectional view of the fastening assembly of the first embodiment of the present invention rotated in the locking direction.

Fig. 8 shows a perspective view of a fastening assembly according to a second embodiment of the utility model.

Fig. 9 shows a schematic cross-sectional view of a fastening assembly according to a second embodiment of the utility model.

Fig. 10 shows an exploded view of a fastener assembly according to a second embodiment of the utility model.

Fig. 11 shows a schematic cross-sectional view of a second embodiment of the fastening assembly of the present invention rotated in an unlocking direction.

FIG. 12 shows a cross-sectional view of the fastening assembly of the second embodiment of the present invention rotated in the locking direction.

Fig. 13 shows a schematic cross-sectional view of a fastening assembly according to a third embodiment of the utility model.

Description of the main component symbols:

1 electronic device

10 first Assembly

12 perforation

20 second Assembly

22 screw hole

30. 30A fastening assembly

31. 31A fixing piece

33. 33A lock accessory

331. 331A, 331B rotating collar

333. 333A stud

334. 334A operation slot

35. 35A, 35B operator

351. 351A anti-slip convex part

37. 37A, 37B torsion limiting mechanism

371. 371A, 371B first butting portion

372 first stop surface

373 round corner structure

374. 374A, 374B second butting part

375 inclined plane

376 second stop surface

377. 377A, 377B elastic part

372A, 372B inclined plane

373A, 373B first stop surfaces

375A, 375B second stop surface

378A first bending section

379A second bending section

39. 39A reset piece

Ax central axis

Central angle of theta 1

Angle theta 2

L1 length

L2 distance

R1 locking direction

R2 unlocking direction

A. Direction B

D radial direction

Detailed Description

The detailed features and advantages of the present invention are described in detail below in the detailed description, which is sufficient to enable any person skilled in the art to understand the technical content of the present invention and to implement the present invention, but not to limit the scope of the present invention in any point.

The following embodiments will be described with reference to the accompanying drawings, in which some conventional structures and elements may be shown in a simplified schematic form for the purpose of illustration. Also, some features in the drawings may be slightly enlarged or changed in scale or size for the purpose of facilitating understanding and viewing of the technical features of the present invention, but it is not intended to limit the present invention. Furthermore, some of the structure lines in some of the figures may be shown in phantom for ease of viewing.

Please refer to fig. 1 and fig. 2. An electronic device 1 according to an embodiment of the present invention is provided, and fig. 1 is a schematic cross-sectional view of the electronic device 1 according to a first embodiment of the present invention. Fig. 2 is an exploded view of the electronic device 1 according to the first embodiment of the utility model. It should be noted that the electronic device 1 may also include components (not shown) such as a casing, a processor, a power supply, a hard disk, etc. only because the embodiments of the present invention do not improve the components, and the drawings simplify or omit electronic/non-electronic components not directly related to the spirit of the present invention for the purpose of simplicity and easy viewing.

In the embodiment of the present invention, the electronic device 1 may be, for example, but not limited to, a desktop host or a server host, and as shown in the figure, the electronic device 1 may at least include a first assembly 10, a second assembly 20 and a fastening assembly 30. The first assembly 10 is, for example, a circuit board, a plastic board or a part of a chassis. The second assembly 20 is an inner member such as a chassis or a fixing frame fixed to the chassis. The fastening member 30 is fixed to the through hole 12 of the first assembly 10, for example, by a tight fit, and the first assembly 10 is locked to the screw hole 22 of the second assembly 20 by the fastening member 30 to fix the first assembly 10 to the second assembly 20.

With continued reference to fig. 1, 3-5, further details of fastening element 30 are described, wherein fig. 3 shows an exploded view of fastening element 30 according to a first embodiment of the present invention. Fig. 4 shows a schematic side view of a fastening assembly 30 according to a first embodiment of the utility model. Fig. 5 shows a cross-sectional view of the fastening assembly 30 of the first embodiment of the present invention rotated in the unlocking direction R2.

In the embodiment of the present invention, the fastening assembly 30 includes, for example, a fixing member 31, a locking member 33, an operating member 35, and a torque limiting mechanism 37. The fixing member 31 is fixed to the through hole 12 of the first assembly 10 (as shown in fig. 1 and 2), for example, by a tight fit manner. The locking attachment 33 includes, for example, a rotating collar 331 and a stud 333. The rotating ring 331 is rotatably sleeved on the fixing member 31 around the central axis Ax. The operating member 35 is sleeved on the rotating ring 331 of the lock attachment 33. The stud 333 passes through the operating member 35 and is fixed to the rotating collar 331, for example, by a tight fit, so that a part of the operating member 35 is interposed between the rotating collar 331 and the stud 333, so that the operating member 35 can rotate in the locking direction R1 or the unlocking direction R2 relative to the assembled rotating collar 331 and stud 333.

In one embodiment, the fastening assembly 30 may further include a restoring member 39. The restoring member 39 is, for example, a compression spring, and two opposite sides of the restoring member 39 respectively abut against the fixed member 31 and the rotating collar 331 of the lock attachment 33 to drive the lock attachment 33 to be restored.

In an embodiment, the operating member 35 has a plum blossom shape, but not limited thereto. In other embodiments, the operating member may have a circular, polygonal, or other irregular shape.

In one embodiment, the operating member 35 has a slip-preventing protrusion 351, for example, to increase the friction between the user's hand and the operating member 35 when the user rotates the operating member 35 by hand.

In one embodiment, the stud 333 has an operation slot 334, and the operation slot 334 is cross-shaped, so that a user can drive the stud 333 to rotate relative to the fixing member 31 by a hand tool such as a cross screwdriver (not shown). However, the arrangement of the operation slot 334 and the shape of the operation slot 334 are not intended to limit the present invention. In other embodiments, the stud may not have an operation slot, or the shape of the operation slot may be changed to be in a straight shape, a quincunx shape, a hexagon shape, or the like.

The torsion limiting mechanism 37 is provided between the lock attachment 33 and the operating member 35. When the operating member 35 rotates the lock attachment 33 in the locking direction R1 or the unlocking direction R2, part of the torsion force limiting mechanism 37 is displaced in the radial direction of the fixed member 31. In the present embodiment, the torque limiting mechanism 37 includes a first abutting portion 371, a second abutting portion 374 and an elastic portion 377. The elastic portion 377 is, for example, an elastic arm, and two opposite fixed ends of the elastic portion 377 are connected to the rotating collar 331. The rotating collar 331 of the present embodiment is inserted into a space surrounded by the elastic portion 377, for example, by means of embedding, so that the elastic portion 377 is fixed to the rotating collar 331. The first abutting portion 371 is connected to a side of the elastic portion 377 away from the rotating ring 331, and is separated from two opposite fixed ends of the elastic portion 377. That is, the first abutting portion 371 is connected to the lock accessory 33 by the elastic portion 377, and the first abutting portion 371 can move relative to the rotating collar 331 along the radial direction D (please refer to fig. 7 temporarily) or the opposite direction of the radial direction D by the elastic force of the elastic portion 377, that is, the first abutting portion 371 can be retracted inward or pushed outward along the radial direction of the fixing member 31. The second abutting portion 374 is fixed to the operating element 35 and drives the first abutting portion 371 to rotate and move along the radial direction D or along the opposite direction of the radial direction D.

In detail, the first abutting portion 371 has a first stopping surface 372. The second abutting portion 374 has an inclined surface 375 and a second stopping surface 376. The second stop surface 376 faces away from the inclined surface 375. When the second stop surface 376 pushes against the first stop surface 372, the first abutting portion 371 and the second abutting portion 374 have a maximum overlapping distance L2. The maximum overlapping distance L2 is smaller than or equal to the maximum displacement of the first abutting portion 371 in the radial direction D, so that when the displacement of the first abutting portion 371 in the radial direction D is larger than or equal to the maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374, the first abutting portion 371 and the second abutting portion 374 can be disengaged. In this way, even if the operating member 35 continues to rotate in the locking direction R1, the locking member 33 will not be carried by the operating member 35, and the locking member 33 and the second assembly 20 (shown in fig. 1 and 2) are prevented from being locked more tightly. On the contrary, if the displacement of the first abutting portion 371 in the radial direction D is smaller than the maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374, the first abutting portion 371 is still pushed by the second abutting portion 374 to rotate along the locking direction R1. In this way, the first abutting portion 371 drives the locking accessory 33 to be locked to the second assembly 20 along the locking direction R1.

Please refer to fig. 5 to 7. Fig. 6 shows a cross-sectional view of the first embodiment of the present invention with the fastening component 30 unlocked from the second assembly 20. Fig. 7 shows a cross-sectional view of the fastening assembly 30 of the first embodiment of the present invention rotated in the locking direction R1.

As shown in fig. 5 and 6, when the operating member 35 rotates in an unlocking direction R2, the second stop surface 376 pushes against the first stop surface 372 and drives the lock accessory 33 to rotate in the unlocking direction R2. When the lock attachment 33 is unlocked from the second assembly 20, the second assembly 20 can move in the direction a, and the lock attachment 33 is moved in the direction B by the elastic force of the reset member 39. Meanwhile, when the operating member 35 is rotated in the unlocking direction R2, the elastic portion 377 is not subjected to an external force in the radial direction D of the stud 333, and therefore the elastic portion 377 is in a state of not being elastically deformed. That is, the first abutting portion 371 connected to the elastic portion 377 has not moved in the radial direction D of the fixing member 31.

As shown in fig. 1 and 7, when the operating member 35 drives the lock attachment 33 to rotate in the locking direction R1, the inclined surface 375 pushes against the first abutting portion 371. And as the locking torsion of the fastening assembly 30 increases, the first abutting portion 371 slides from the side of the inclined surface 375 close to the second stopping surface 376 to the side away from the second stopping surface 376. During the sliding process, the first abutting portion 371 still receives the pushing and abutting force of the second abutting portion 374 in the circumferential direction to rotate along the locking direction R1. In addition, the first abutting portion 371 is also pushed by the second abutting portion 374 in the radial direction D to move in the radial direction D, so that the overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374 is gradually reduced. The overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374 decreases by an amount equal to the amount of movement of the first abutting portion 371 in the radial direction D. When the amount of movement of the first abutting portion 371 in the radial direction D is greater than or equal to the maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374, i.e. the locking torque of the fastening assembly 30 is greater than the upper limit of the torque limiting mechanism 37, the first abutting portion 371 and the second abutting portion 374 are disengaged, and the upper limit of the torque limit is, for example, between 3 and 5kgf · cm. That is, when the locking torque of the fastening assembly 30 is greater than the upper limit of the torque limiting mechanism 37, the operating member 35 with the second abutting portion 374 is in an idle state and cannot continuously drive the locking accessory 33 with the first abutting portion 371 to rotate relative to the fixing member 31.

Through the above process, the operating member 35 can drive the rotating collar 331 of the locking accessory 33 to rotate together with respect to the fixed member 31 to achieve the locking or unlocking operation. Or the operating member 35 can rotate independently relative to the rotating ring 331 of the locking accessory 33 to avoid the excessive torque generated during the locking process of the fastening assembly 30 and avoid the damage of the first assembly 10 or the detachment of the fastening assembly 30 from the first assembly 10 due to the excessive torque.

In an embodiment, the first abutting portion 371 may further have a rounded corner structure 373, the radius of the rounded corner structure 373 is, for example, 1 mm, and the rounded corner structure 373 is pushed by the inclined surface 375 to reduce the wear between the first abutting portion 371 and the second abutting portion 374. However, the design of the fillet is not intended to limit the present invention. In other embodiments, the first abutting portion may have no rounded corner structure 373 or the radius of the rounded corner structure 373 may be changed to 2 mm or other dimensions.

Referring now to fig. 5, further details of the fastener assembly 30 will be described. In one embodiment, the length L1 of the inclined surface 375 is, for example, 7 mm. The inclined surface 375 has an inclination angle θ 2 of, for example, 32 to 34 degrees. The central angle θ 1 of the arc length formed from one end of the elastic portion 377 to the first abutting portion 371 is, for example, 40 degrees. The maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374 in the radial direction D is, for example, 0.8 mm. However, the above numerical values are only for illustration and are not used to limit the present invention. In other embodiments, the relative values may be adjusted according to actual torque limit requirements or other requirements.

In one embodiment, the number of the first abutting portion 371, the second abutting portion 374 and the elastic portion 377 is three, for example, and the number thereof is proportional to the upper limit of the required torque force limit. When the upper limit of the required torque force limit is larger, the number of the first abutting portions 371, the second abutting portions 374 and the elastic portions 377 is larger, but the upper limit is not limited thereto. In other embodiments, the number of the first abutting portion, the second abutting portion and the elastic portion may be only one or two.

In an embodiment, the maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374 in the radial direction D is, for example, 0.8 mm, and the maximum overlapping distance L2 is proportional to the upper limit of the required torque limit. When the upper limit of the torque force limitation is larger, the maximum overlapping distance L2 between the first abutting portion 371 and the second abutting portion 374 in the radial direction D is larger, but not limited thereto. In other embodiments, the maximum overlapping distance L2 between the first abutting portion and the second abutting portion in the radial direction D may be changed to other values.

In an embodiment, the opposite fixed ends of the elastic portion 377 are connected to the rotating ring 331 to increase the elastic force of the elastic portion 377, but not limited thereto. In other embodiments, only one end of the elastic part can be connected to the rotating collar.

In an embodiment, the elastic portion 377 is disposed on the rotating collar 331, that is, the elastic portion 377 is connected to the first abutting portion 371 at the inner side, but not limited thereto. In other embodiments, the elastic portion may be connected to the second abutting portion located at the outer side instead. That is, the second abutting portion can move along the radial direction D of the fixing member by the elastic force of the elastic portion to change the overlapping distance L2 between the first abutting portion and the second abutting portion.

In an embodiment, the elastic portion 377 is an elastic arm, but not limited thereto. In other embodiments, the elastic portion may be replaced by other elastic members, such as a spring or a flexible material. The detailed description will be described later.

With continued reference to fig. 8-11, further details of fastening element 30A are provided, wherein fig. 8 shows a perspective view of fastening element 30A according to a second embodiment of the present invention. Fig. 9 shows a cross-sectional view of a fastener assembly 30A according to a second embodiment of the utility model. Fig. 10 shows an exploded view of a fastener assembly 30A of a second embodiment of the utility model.

In the embodiment of the present invention, the fastening assembly 30A includes, for example, a fixing member 31A, a locking member 33A, an operating member 35A, and a torque limiting mechanism 37A. The fixing member 31A is fixed to the through hole 12 of the first assembly 10 (as shown in fig. 1 and 2), for example, by a tight fit manner. The locking attachment 33A includes, for example, a rotating collar 331A and a stud 333A. The rotating ring 331A is rotatably sleeved on the fixing member 31A around the central axis Ax. The operating member 35A is sleeved on the rotating ring 331A of the locking attachment 33A. The stud 333A passes through the operating member 35A and is fixed to the rotating collar 331A, for example, by a tight fit, so that a portion of the operating member 35A is interposed between the rotating collar 331A and the stud 333A, so that the operating member 35A can rotate in the locking direction R1 or the unlocking direction R2 with respect to the fixed rotating collar 331A and the stud 333A.

In one embodiment, fastening assembly 30A may further include a restoring member 39A. The restoring element 39A is, for example, a compression spring, and two opposite sides of the restoring element 39A respectively abut against the fixed element 31A and the rotating collar 331A of the lock attachment 33A to drive the lock attachment 33A to restore.

The torsion limiting mechanism 37A is provided between the lock attachment 33A and the operating member 35A. When the operating member 35A drives the lock attachment 33A to rotate in the locking direction R1 or the unlocking direction R2, part of the torsion limiting mechanism 37A is displaced in the radial direction of the fixed member 31A. In the present embodiment, the torque limiting mechanism 37A includes a first abutting portion 371A, a second abutting portion 374A and an elastic portion 377A. The first abutting portion 371A is connected to the rotating ring 331A. The first abutting portion 371A and the rotating ring 331A of the present embodiment are integrally formed, but not limited thereto. In other embodiments, different elements may be embedded or otherwise combined. The second abutting portion 374A is connected to the operating member 35A through the elastic portion 377A, and the second abutting portion 374A moves along the radial direction of the fixing member 31A relative to the operating member 35A through the elastic force of the elastic portion 377A. In an embodiment, the elastic portion 377A and the second abutting portion 374A are formed by bending an integrally formed elastic sheet structure, and the elastic portion 377A includes a first bending section 378A and a second bending section 379A. The first bending section 378A abuts against the operating member 35A. The second bending section 379A is connected to the first bending section 378A, and the opening direction of the first bending section 378A is opposite to the opening direction of the second bending section 379A, so as to improve the elasticity of the elastic portion 377A. The second abutting portion 374A is connected to a side of the second bending section 379A away from the first bending section 378A. That is, the second abutting portion 374A can move relative to the operating member 35A in the radial direction D or the opposite direction of the radial direction D by the elastic force of the elastic portion 377A, that is, the second abutting portion 374A can be retracted inward or pushed outward in the radial direction of the stud 333A. The second abutting portion 374A drives the first abutting portion 371A to rotate and is pushed by the first abutting portion 371A to move along the radial direction D or along the opposite direction of the radial direction D.

Specifically, the first abutting portion 371A has an inclined surface 372A and a first stopping surface 373A. The first stop surface 373A faces away from the inclined surface 372A. The second abutting portion 374A has a second stop surface 375A, for example. When the second stop surface 375A pushes against the first stop surface 373A, the first abutting portion 371A and the second abutting portion 374A have a maximum overlapping distance L2. The maximum overlapping distance L2 is smaller than or equal to the maximum displacement of the second abutting portion 374A in the radial direction D, so that when the displacement of the second abutting portion 374A in the radial direction D is greater than or equal to the maximum overlapping distance L2 of the first abutting portion 371A and the second abutting portion 374A, the first abutting portion 371A and the second abutting portion 374A can be disengaged. In this way, even if the operating member 35A continues to rotate in the locking direction R1, the locking member 33A will not be carried by the operating member 35A, and the locking member 33A and the second assembly 20 (shown in fig. 1 and 2) are prevented from being locked more tightly. On the contrary, if the displacement amount of the second abutting portion 374A in the radial direction D is smaller than the maximum overlapping distance L2 between the first abutting portion 371A and the second abutting portion 374A, the first abutting portion 371A is still pushed by the second abutting portion 374A to rotate along the locking direction R1. In this way, the first abutting portion 371A drives the locking accessory 33A to be locked to the second assembly 20 along the locking direction R1.

Please refer to fig. 11 and 12. Fig. 11 shows a cross-sectional view of the fastening assembly 30A of the second embodiment of the present invention rotated in the unlocking direction R2. Fig. 12 shows a cross-sectional view of the fastening assembly 30A of the second embodiment of the present invention rotated in the locking direction R1.

As shown in fig. 11, when the operating member 35A drives the lock attachment member 33A to rotate in an unlocking direction R2, the second stop surface 375A pushes against the first stop surface 373A. Further, generally, when the operating element 35A is rotated in the unlocking direction R2, the elastic portion 377A is not subjected to an external force in the radial direction D of the stud 333A, and therefore the elastic portion 377A is not elastically deformed. That is, the second abutting portion 374A connected to the elastic portion 377A is not moved yet in the radial direction D.

As shown in fig. 12, when the operating member 35A drives the locking accessory 33A to rotate in the locking direction R1, the inclined surface 372A of the first abutting portion 371A pushes against the second abutting portion 374A. And as the locking torque of fastening assembly 30A increases, second abutting portion 374A slides from the side of inclined surface 372A close to second stop surface 375A to the side away from second stop surface 375A. During the sliding process, the first abutting portion 371A is still pushed by the second abutting portion 374A in the circumferential direction to rotate along the locking direction R1. In addition, the second abutting portion 374A is also pushed by the first abutting portion 371A in the radial direction D to move in the radial direction D, so that the overlapping distance L2 between the first abutting portion 371A and the second abutting portion 374A is gradually reduced. The overlapping distance L2 between the first abutting portion 371A and the second abutting portion 374A is reduced by an amount equal to the amount of movement of the second abutting portion 374A in the radial direction D. When the amount of movement of the second abutting portion 374A in the radial direction D is greater than or equal to the maximum overlapping distance L2 between the first abutting portion 371A and the second abutting portion 374A, that is, when the locking torque of the fastening assembly 30A is greater than the upper limit of the torque limiting mechanism 37A, the first abutting portion 371A and the second abutting portion 374A are disengaged from each other, and the upper limit of the torque limit is, for example, between 3 and 5kgf · cm. That is, when the locking torque of the fastening assembly 30A is greater than the upper limit of the torque limiting mechanism 37A, the operating element 35A with the second abutting portion 374A is in an idle state and cannot continuously drive the locking accessory 33A with the first abutting portion 371A to rotate relative to the fixing element 31A.

In this way, the operating member 35A can drive the rotating ring 331A of the locking accessory 33A to rotate together with respect to the fixing member 31A to achieve the locking or unlocking operation. Or the operating member 35A can rotate independently relative to the rotating ring 331A of the locking accessory 33A to avoid the excessive torque generated during the locking process of the fastening assembly 30A and avoid the damage of the first assembly 10 or the detachment of the fastening assembly 30A from the first assembly 10 due to the excessive torque.

In one embodiment, the number of the first abutting portions 371A, the second abutting portions 374A and the elastic portion 377A is five, for example, and the number thereof is proportional to the upper limit of the required torque limit. When the upper limit of the required torque force limit is larger, the number of the first abutting portion 371A, the second abutting portion 374A and the elastic portion 377A is larger, but not limited thereto. In other embodiments, the number of the first abutting portion, the second abutting portion and the elastic portion may be only one or two.

In an embodiment, the elastic portion 377A is disposed on the operating element 35A, that is, the elastic portion 377A is connected to the second abutting portion 374A located at the outer side, but not limited thereto. In other embodiments, the elastic portion may be connected to the first abutting portion located at the inner side instead. That is to say, the first abutting portion can move along the radial direction of the stud through the elastic force of the elastic portion to change the overlapping distance between the first abutting portion and the second abutting portion.

Please refer to fig. 13. Fig. 13 shows a schematic partial cross-sectional view of a fastening assembly according to a third embodiment of the utility model.

The torque limiting mechanism 37B includes a first abutting portion 371B, a second abutting portion 374B and an elastic portion 377B. The first abutting portion 371B is connected to the rotating ring 331B. The second abutting portion 374B is connected to the operating member 35B through the elastic portion 377B, and the second abutting portion 374B moves along the radial direction of the rotating collar 331B relative to the operating member 35B through the elastic force of the elastic portion 377B. In one embodiment, the elastic portion 377B is a compression spring, for example. That is, the second abutting portion 374B can move relative to the operating member 35B in the radial direction D or the opposite direction of the radial direction D by the elastic force of the elastic portion 377B, i.e., the second abutting portion 374B can be retracted inward or pushed outward in the radial direction of the rotating collar 331B. The second abutting portion 374B drives the first abutting portion 371B to rotate and is pushed by the first abutting portion 371B to move along the radial direction D or along the opposite direction of the radial direction D.

Specifically, the first abutting portion 371B has an inclined surface 372B and a first stopping surface 373B. The first stop surface 373B faces away from the inclined surface 372B. The second abutting portion 374B has a second stop surface 375B, for example. When the operating member 35B moves in the unlocking direction R2 to push the second stop surface 375B against the first stop surface 373B, the first abutting portion 371B and the second abutting portion 374B have the maximum overlapping distance. The maximum overlapping distance is smaller than or equal to the maximum displacement of the second abutting portion 374B in the radial direction D, so that when the displacement of the second abutting portion 374B in the radial direction D is larger than or equal to the maximum overlapping distance of the first abutting portion 371B and the second abutting portion 374B, the first abutting portion 371B and the second abutting portion 374B can be disengaged. In this way, even if the operating member 35B continues to rotate in the locking direction R1, the locking member 33 will not be carried by the operating member 35B, and the locking member 33 and the second assembly 20 (shown in fig. 1 and 2) are prevented from being locked more tightly. On the contrary, if the displacement of the second abutting portion 374B in the radial direction D is smaller than the maximum overlapping distance between the first abutting portion 371B and the second abutting portion 374B, the first abutting portion 371B is still pushed by the second abutting portion 374B to rotate along the locking direction R1.

The above description is not intended to limit the present invention, and in one embodiment, the fastening assembly includes a fixing member, a locking member, an operating member, and a torque limiting mechanism. The locking accessory is rotatably arranged on the fixing piece. The operating piece is rotatably sleeved on the lock accessory. The torque limiting mechanism engages the operating member and the lock attachment. When the torque force of the operating part rotating relative to the locking accessory is smaller than or equal to the torque force limit upper limit of the torque force limiting mechanism, the operating part drives the locking accessory to rotate relative to the fixing part through the torque force limiting mechanism, and when the torque force of the operating part rotating relative to the locking accessory is larger than the torque force limit upper limit of the torque force limiting mechanism, the torque force limiting mechanism enables the operating part to idle relative to the locking accessory.

Although the present invention has been described with reference to the foregoing embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. A fastener assembly, comprising:

a fixed member;

a lock accessory, which is rotatably arranged on the fixed part;

the operating piece is rotatably sleeved on the locking piece; and

the torsion limiting mechanism is arranged between the locking accessory and the operating piece, and when the operating piece drives the locking accessory to rotate along a locking direction, part of the torsion limiting mechanism moves along the radial direction of the fixing piece.

2. The fastening assembly according to claim 1, wherein the torque limiting mechanism includes a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are respectively disposed on the locking accessory and the operating member, and when the operating member drives the locking accessory to rotate along the locking direction, one of the first abutting portion and the second abutting portion is pushed by the other of the first abutting portion and the second abutting portion to move along the radial direction of the fixing member.

3. The fastening assembly according to claim 2, wherein the locking member includes a rotating collar and a stud, the rotating collar is rotatably sleeved on the fixing member, the stud is fixed on the rotating collar, the first abutting portion is movably disposed on the rotating collar along a radial direction of the fixing member, the second abutting portion is fixedly disposed on the operating member, and when the operating member drives the locking member to rotate along the locking direction, the first abutting portion is pushed by the second abutting portion to move along the radial direction of the fixing member.

4. The fastening assembly according to claim 3, wherein the torque limiting mechanism further includes an elastic portion, the second abutting portion is connected to the operating member through the elastic portion, and the second abutting portion moves along the radial direction of the fixing member relative to the operating member through the elastic force of the elastic portion.

5. The fastener assembly of claim 4, wherein the resilient portion and the second abutting portion are formed by bending an integrally formed resilient piece structure.

6. The fastening assembly according to claim 4, wherein the resilient portion includes a first bending section and a second bending section, an opening direction of the first bending section is opposite to an opening direction of the second bending section, the first bending section abuts against the operating member, the second bending section is connected to the first bending section, and the second abutting portion is connected to a side of the second bending section away from the first bending section.

7. The fastener assembly of claim 3, wherein the torque limiting mechanism further comprises an elastic portion, the first abutting portion is connected to the rotating collar through the elastic portion, and the first abutting portion moves along the radial direction of the fixing member relative to the rotating collar through the elastic force of the elastic portion.

8. The fastener assembly of claim 7, wherein the resilient portion is a resilient arm, and opposite ends of the resilient portion are connected to the rotatable collar, and the first abutting portion is connected to a side of the resilient portion away from the rotatable collar and separated from the opposite ends of the resilient portion.

9. The fastening assembly according to claim 8, wherein the first abutting portion has a first stopping surface, the second abutting portion has an inclined surface and a second stopping surface, the second stopping surface faces away from the inclined surface, and when the operating member drives the locking member to rotate along the locking direction, the inclined surface pushes against the first abutting portion.

10. The fastener of claim 9, wherein the second stop surface abuts the first stop surface when the operating member rotates the locking member in an unlocking direction.

11. The fastener of claim 9, wherein the length of the inclined surface is 7 mm, the inclined angle of the inclined surface is 32 to 34 degrees, the central angle of the arc length formed by the elastic portion from one end to the first abutting portion is 40 degrees, and the maximum overlapping distance between the first abutting portion and the second abutting portion in the radial direction is 0.8 mm.

12. The fastener assembly of claim 3, wherein the stud has an operating slot.

13. The fastening assembly according to claim 2, wherein a maximum overlapping distance between the first abutting portion and the second abutting portion is smaller than or equal to a maximum displaceable amount of the first abutting portion or the second abutting portion in a radial direction of the fixing member, and when a displaceable amount of the first abutting portion or the second abutting portion in the radial direction of the fixing member is greater than or equal to the maximum overlapping distance between the first abutting portion and the second abutting portion, the first abutting portion and the second abutting portion are disengaged.

14. The fastener of claim 1, further comprising a restoring member, opposite sides of the restoring member abutting against the fixing member and the locking member, respectively.

15. The fastener of claim 1, wherein the operating member has a slip-resistant projection.

16. An electronic device, comprising:

a first assembly;

a second assembly; and

a fastening assembly, the fastening assembly comprising:

a fixing member fixed to the first assembly;

a locking piece which is rotatably arranged on the fixed piece and is used for locking and attaching to the second assembly;

the operating piece is rotatably sleeved on the locking piece; and

17. The electronic device of claim 16, wherein the torque limiting mechanism includes a first abutting portion and a second abutting portion, the first abutting portion and the second abutting portion are respectively connected to the locking accessory and the operating element, and when the operating element drives the locking accessory to rotate along the locking direction, one of the first abutting portion and the second abutting portion is pushed by the other of the first abutting portion and the second abutting portion to move along the radial direction of the fixing element.

18. The electronic device of claim 17, wherein the torque limiting mechanism further comprises an elastic portion, the first abutting portion is connected to the rotating collar through the elastic portion, and the first abutting portion moves along a radial direction of the fixing member relative to the rotating collar through an elastic force of the elastic portion.

19. The electronic device according to claim 17, wherein a maximum overlapping distance between the first abutting portion and the second abutting portion is smaller than or equal to a maximum displaceable amount of the first abutting portion or the second abutting portion in a radial direction of the fixing member, and when a displacement amount of the first abutting portion or the second abutting portion in the radial direction of the fixing member is greater than or equal to the maximum overlapping distance between the first abutting portion and the second abutting portion, the first abutting portion and the second abutting portion are disengaged.

20. A fastener assembly, comprising:

a fixed member;

a lock accessory, which is rotatably arranged on the fixed part;

the operating piece is rotatably sleeved on the locking piece; and

a torque limiting mechanism, which connects the operating member and the locking member;

when the torque force of the operation piece rotating relative to the locking attachment is smaller than or equal to the upper torque force limit of the torque force limiting mechanism, the operation piece drives the locking attachment to rotate relative to the fixing piece through the torque force limiting mechanism, and when the torque force of the operation piece rotating relative to the locking attachment is larger than the upper torque force limit of the torque force limiting mechanism, the torque force limiting mechanism enables the operation piece to idle relative to the locking attachment.