TWI898581B - Fixing device - Google Patents

Abstract

The present invention is a fixing device, comprising: a base, which includes a main body and a receiving cavity, a plurality of positioning blocks are formed in the receiving cavity, a supporting portion and a receiving portion are formed on the main body, and the supporting portion extends outward to form a pull portion; a sleeve, which includes a barrel and a channel, a stop ring and a plurality of limiting grooves are formed on the bottom side of the barrel, and a fixing body is provided on the bottom side of the stop ring; a fixing member, which includes a rod and an elastic member is provided between the outside of the rod and the sleeve, and the rod includes a connecting portion and a latching body; a cover, which includes a main body and a receiving chamber, the receiving chamber is upwardly connected to a locking groove for locking the connecting portion of the fixing member, and a first positioning area, a guide ramp and a second positioning area are formed on the bottom side of the main body for contacting and accommodating the supporting portion and the receiving portion of the base.

Description

Fixing device

The present invention relates to a fixing device, particularly a sleeve of the fixing device riveted to a first plate through a bottom fixing body. When the driving pull portion is rotated in a first direction, the abutting position of the abutting portion can be moved from a first positioning area via a guide ramp to a second positioning area, and the cover and the fixing member can be moved upward to disengage from a second through hole of the second plate, thereby entering an unlocked state. When the driving pull portion is rotated in a second direction, the abutting position of the abutting portion can be moved from the second positioning area via the guide ramp to the first positioning area, and the cover and the fixing member can be moved downward to extend into the second through hole of the second plate, thereby entering a locked state. At the same time, the sleeve's multiple stop grooves provide abutment against the base's multiple positioning blocks, ensuring precise positioning. This creates a graduated feel during rotation and prevents over- or under-rotation. The combination of the multiple stop grooves and the multiple positioning blocks ensures smooth rotation during locking and unlocking.

Typically, when assembling panels (board-to-board), they are locked using a set screw consisting of a knob, a collar, and a screw. The screw and collar are secured to the first panel, and the knob is then turned to lock the screw into the second panel, forming a predetermined position. The screw is then tightened with a hand tool, locking the first and second panels together. This locking method is used in equipment such as telecommunications cabinets, industrial computer cases, and machine tool panels, where multiple knobs, screws, and other devices and mechanisms are used to achieve board-to-board connections.

However, if the user or on-site worker is not wearing the appropriate hand tools during the operation, the overall disassembly and assembly process will be affected. Therefore, some industry insiders have developed a positioning device that allows on-site workers or users to rotate it manually to perform tasks such as fixing or disassembling board-to-board assemblies. Please refer to Figures 8 and 9. As can be clearly seen in the figures, the positioning device is equipped with a through-hole A1 inside the sleeve A and a limit ring A2 protruding from the outer edge of the top of the sleeve A. The surface of the limit ring A2 is also cut with multiple grooves arranged at intervals. A21, and the limiting ring A2 forms two first ring edges A22 with an enlarged outer diameter between any two adjacent grooves A21, and two second ring edges A23 with a reduced outer diameter formed on the other two opposite peripheries and arranged in an alternating manner with the two first ring edges A22. A rotating rod B1 with a screw element B is inserted into the through hole A1, and a rotating rod B2 is inserted into the bottom of the rotating rod B1. A rod head B3 is provided on the top of the rotating rod B1 and is exposed outside the sleeve A. An elastic body B4 is provided on the rotating rod B1 for supporting the inside of the through hole A1, and an outer sleeve C is assembled on the outside of the screw element B. , and an installation space C1 for assembling the rod head B3 is formed inside the outer sleeve C, and a sliding hole C2 covering the outer side of the limit ring A2 and displacing in the longitudinal direction is provided on one side of the installation space C1, and two opposite long protrusions C21 and two opposite short protrusions C22 adjacent to the two long protrusions C21 are provided on the inner wall of the sliding hole C2, and each long protrusion C21 and the short protrusion C22 are respectively positioned and clamped in each groove A21 on the outer edge of the limit ring A2, and a pointed pull portion C3 is provided outward at the top of the outer side of the outer sleeve C, and a tool for opening and closing is provided on the top of the outer sleeve C. Marked indicator portion C4. Once sleeve A is positioned on the preset positioning plate (not shown), the outer sleeve C drives the rotating rod B1 of the screw-on element B to move vertically along the through-hole A1 of sleeve A, causing the rotating rod B2 of the screw-on element B to pass through the hole of the preset fixing plate (not shown). The outer sleeve C is then rotated 90 degrees clockwise or counterclockwise by turning the lever C3. This in turn drives the rotating rod B2 to rotate and engage the bottom surface of the preset fixing plate, thereby manually locking the preset positioning plate and the preset fixing plate together.

However, since the two first edges A22 and the two second edges A23 of the limiting ring A2 of the sleeve A are arranged in a staggered manner, and the two long protrusions C21 and the two short protrusions C22 on the inner wall of the sliding hole C2 of the outer sleeve C are arranged opposite to each other, when the outer sleeve C is pressed down and rotated, the two long protrusions C21 of the outer sleeve C can only rotate towards the two second edges A23 with smaller outer diameters at the same time, thereby making the outer sleeve Whether locked or unlocked, C can only be rotated in a single direction (clockwise or counterclockwise). Consequently, once the rotating rod B2 of the screw-lock element B is locked to the preset fixing plate, subsequent users cannot determine whether the screw-lock element B is locked or unlocked by rotating it 90 degrees (because locking and unlocking require only 90-degree rotation). This affects the overall assembly and disassembly process time and smoothness. In addition to being quite time-consuming and inconvenient, it is necessary to further process the indicator portion C4 on the top surface of the outer sleeve C in order to understand the locking and unlocking direction of the positioning device, thereby increasing the cost of the processing operation. Whether the outer sleeve C is in the locked or unlocked state, it is used by reciprocating rotation. The two long cams C21 and the two short cams C22 of the outer sleeve C are located at the limit ring A2 and rotated, which is easy to Operating the outer sleeve C with excessive force or too quickly can cause the two long and short rods C21 and C22 to cross the desired groove A21 and rotate to the next groove A21, resulting in an insecure lock. This can also easily lead to frictional wear and tear between the two long and short rods C21 and C22 and the multiple grooves A21, the two first and second ring edges A22, and the two second ring edges A23.

Therefore, manufacturers in this industry are urgently looking to improve their positioning devices by addressing the problem of excessive force applied to the outer sleeve, which can cause the outer sleeve to rotate beyond its designated position.

Therefore, in light of the above-mentioned problems and deficiencies, the inventor collected relevant information and, after extensive evaluation and consideration, came up with the invention of this interface card positioning fastener.

The main purpose of the present invention is to provide a fixing device, comprising: a base, which includes a main body and a receiving cavity, a plurality of positioning blocks formed in the receiving cavity, a supporting portion and a receiving portion formed on the main body, and a pull portion extending outward from the supporting portion; a sleeve, which includes a barrel and a channel, a stop ring and a plurality of limiting grooves formed on the bottom side of the barrel, and a fixing body on the bottom side of the stop ring. A fixing member includes a rod with an elastic member disposed between the rod's exterior and the sleeve. The rod includes a connecting portion and a latching body. A cover includes a main body and a receiving chamber. The receiving chamber upwardly communicates with a snap-fitting groove for securing the fixing member's connecting portion. The main body bottom includes a first positioning area, a guide ramp, and a second positioning area for contacting and receiving the supporting portion and receiving portion of the base.

The sleeve of the fixing device is riveted to the first plate through the bottom fixing body. When the driving pull part is rotated in the first direction, the supporting position of the supporting part can be moved from the first positioning area to the second positioning area via the guide ramp, and the cover and the fixing part can be moved upward to disengage from the second through hole of the second plate and enter an unlocked state; when the driving pull part is rotated in the second direction, the supporting position of the supporting part can be moved from the second positioning area to the first positioning area via the guide ramp, and the cover and the fixing part can be moved downward to extend into the second through hole of the second plate and enter a locked state. At the same time, the sleeve's multiple stop grooves provide abutment against the base's multiple positioning blocks, ensuring precise positioning. This creates a graduated feel during rotation and prevents over- or under-rotation. The combination of the multiple stop grooves and the multiple positioning blocks ensures smooth rotation during locking and unlocking.

A secondary purpose of the present invention is that the pull portion of the base has an appearance similar to a hollow semicircular body, and the volume of the pull portion is larger than the main body.

Another object of the present invention is to form a plurality of arcuate plate-like top portions on the top side of the sleeve, with limiting surfaces formed on the inner walls opposite to these top portions, and to form positioning surfaces on the rod of the fixing member corresponding to these limiting surfaces.

Another object of the present invention is to install a fixing body made of metal material at the center of the top surface of the cover by insert injection molding, and to form the locking groove in the fixing body.

Another object of the present invention is to form two positioning blocks on the surface of the receiving cavity of the base, each positioned 90 degrees apart. Corresponding to the two positioning blocks, three limiting grooves 221 are formed in the retaining ring of the sleeve, each 90 degrees apart. For unidirectional rotation, the number of limiting grooves 221 is equal to the number of positioning blocks plus one; for bidirectional rotation, the number of limiting grooves is equal to the number of positioning blocks plus two.

1: Base

10: Storage cavity

11: Subject

111: Support Department

112: Accommodation section

12: Positioning block

13: Trigger

2: Sleeve

20: Channel

21: Barrel

22: Stop ring

221: Limiting slot

23: Fixed body

231: Anti-rotation cutting edge

24: Top

241: Limiting surface

3: Fixing parts

31: Shaft

311: Positioning surface

32: Joint

33: Clamp body

331: Shoulder

34: Elastic parts

4: Cover

40: Accommodation Room

41: Body

411: First Location Area

412: Guide ramp

413: Second Positioning Area

42: Fixed body

420: Snap-fit slot

5: First board

50: First through hole

501: Limit side

6: Second board

60: Second through hole

A: Socket

A1: Perforation

A2: Limiting ring

A21: Groove

A22: First Ring

A23: Second Ring

B: Turn-on element

B1: Rotating rod

B2: Rotating rod

B3: Clubhead

B4: Elastic body

C: Outer sleeve

C1: Installation space

C2: Sliding hole

C21: Long convex rod

C22: Short convex rod

C3: Trigger

C4: Instruction Department

Figure 1 is a three-dimensional external view of the fixing device of the present invention in the locked state.

Figure 2 is a three-dimensional exploded view of the fixing device of the present invention.

Figure 3 is a three-dimensional exploded view of the fixing device of the present invention from another perspective.

Figure 4 is a side cross-sectional view of the fixing device of the present invention in the locked state.

Figure 5 is a side cross-sectional view of the fixing device of the present invention in the unlocked state.

Figure 6 is a top cross-sectional view of the fixing device of the present invention from the locked to unlocked states.

Figure 7 is a three-dimensional view of the fixing device of the present invention in the unlocked state.

Figure 8 is a 3D exploded view of the learning positioning device.

Figure 9 is a 3D exploded view of the learning positioning device from another perspective.

To achieve the above-mentioned objectives and effects, the present invention employs technical means and structures. The following drawings illustrate the features and functions of the preferred embodiment of the present invention for a complete understanding.

Please refer to Figures 1-3, which respectively show a three-dimensional external view of the fixing device of the present invention in the locked state, an exploded three-dimensional view of the fixing device, and an exploded three-dimensional view from another angle. As can be clearly seen from the figures, the fixing device of the present invention primarily comprises: a base 1, a sleeve 2, a fixing member 3, and a cover 4. Its main components and features are described in detail as follows: The base 1 comprises a main body 11 having a receiving cavity 10 therein. A plurality of positioning blocks 12 are embossed on the surface of the receiving cavity 10. The main body 11 is formed with at least one higher abutting portion 111 and at least one lower receiving portion 112. The abutting portion 111 extends outward to form a pull portion 13.

The sleeve 2 includes a barrel 21 that penetrates the receiving chamber 10 and defines a passage 20 therein. A stopper ring 22 protrudes outward from the bottom of the barrel 21. The stopper ring 22 includes a plurality of retaining grooves 221 for the positioning blocks 12 to abut against. A fixing body 23 further extends downward from the bottom of the stopper ring 22.

The fixing member 3 includes a rod 31 that passes through the channel 20. An elastic member 34 is disposed between the exterior of the rod 31 and the sleeve 2. The elastic member 34 is formed of a spring. The top of the rod 31 has a joint 32, and the bottom of the rod 31 expands outward to form a latch 33.

The cover 4 includes a body 41 and a receiving chamber 40 formed inside the body 41. The receiving chamber 40 is upwardly connected to a snap-fitting groove 420 for the anchor portion 32 of the fixing member 3 to be fixed. A first positioning area 411, a guide ramp 412 and a second positioning area 413 are formed on the bottom side of the body 41 for the supporting portion 111 and the receiving portion 112 of the base 1 to form abutment and accommodation. When the pull portion 13 is driven to rotate in the first direction, the pull portion 13 can be rotated in the first direction. The abutting position of the abutting portion 111 is moved from the first positioning zone 411 to the second positioning zone 413 via the guide ramp 412, causing the cover 4 and the fixing member 3 to move upward to an unlocked state. When the pull portion 13 is driven to rotate in the second direction, the abutting position of the abutting portion 111 is moved from the second positioning zone 413 to the first positioning zone 411 via the guide ramp 412, causing the cover 4 and the fixing member 3 to move downward to a locked state.

The lever portion 13 of the base 1 is approximately hollow and semicircular in appearance. The lever portion 13 is larger than the main body 11. The larger lever portion 13 generates a longer torque and facilitates force application.

The surface of the receiving chamber 10 of the base 1 is formed with two positioning blocks 12 spaced 90 degrees apart. Corresponding to the two positioning blocks 12, the retaining ring 22 of the sleeve 2 is provided with three limiting grooves 221 spaced 90 degrees apart. For unidirectional rotation, the number of limiting grooves 221 is equal to the number of positioning blocks 12 plus one. For bidirectional rotation, the number of limiting grooves 221 is equal to the number of positioning blocks 12 plus two.

The sleeve 2 has a plurality of curved, sheet-like top portions 24 formed on the top of the barrel 21. Limiting surfaces 241 are formed on the opposing inner walls of these top portions 24. Positioning surfaces 311 are cut from the rod 31 of the fixing member 3 at locations corresponding to these limiting surfaces 241. This structure prevents the fixing member 3 from rotating relative to the sleeve 2. Furthermore, the outer wall of the fixing body 23 of the sleeve 2 has an anti-rotation cut edge 231 formed thereon. The first through-hole 50 of the pre-set first plate 5 has a limiting side 501 corresponding to the anti-rotation cut edge 231. This structure prevents the sleeve 2 from rotating relative to the first plate 5.

A shoulder 331 is formed between the rod 31 and the latch 33 of the fixing member 3, against which one end of the elastic member 34 abuts and positions the elastic member 34. The other end of the elastic member 34 abuts and positions the elastic member 34 against the bottom surface of the top portion 24 of the sleeve 2. The latch 33 of the fixing member 3 has a larger diameter than the rod 31, and the rod 31 has a larger diameter than the joint 32.

A metal fixing body 42 is installed at the center of the top of the cover 4 using an insert molding process. The locking groove 420 is formed in the fixing body 42.

To assemble the fixing device of the present invention, the elastic member 34 is first placed on the outside of the rod 31 of the fixing member 3 with one end resting on the shoulder 331. The fixing member 3 is then inserted from the bottom up into the channel 20 of the sleeve 2, with the positioning surface 311 of the rod 31 aligned with the limiting surface 241 of the sleeve 2, and the fixing member 3 is pre-positioned so that the fixing portion 32 is exposed above the top 24 of the sleeve 2. At the same time, the other end of the elastic member 34 rests on the bottom surface of the top 24 of the sleeve 2. Next, insert the sleeve 2 upwards into the receiving cavity 10 of the base 1, ensuring that the retaining groove 221 of the sleeve 2 contacts and positions the base 1 with the positioning block 12. Finally, the engaging groove 420 of the cover 4 engages and secures the fixing portion 32 of the fixing member 3 from top to bottom, ensuring that the first positioning area 411 of the cover 4 contacts the supporting portion 111 of the base, and the second positioning area 413 contacts the receiving portion 112. This creates a tight connection between the cover 4 and the main body 11 of the base 1. This completes the assembly of the fixing device.

Please refer to Figures 4 to 7, which are respectively a side cross-sectional view of the fixing device of the present invention in a locked state, a side cross-sectional view of the unlocked state, a top cross-sectional view from the locked to unlocked state, and a three-dimensional appearance view of the unlocked state. At the same time, refer to Figure 1, which discloses that when the fixing device is actually used to fix two plates, the fixing body 23 on the bottom side of the sleeve 2 is first positioned against the second plate 5. After the anti-rotation cutting edge 231 on one side of the first through hole 50 is aligned with the limiting side on one side of the first through hole 50, the fixing device is riveted from top to bottom on the first plate 5 by a punching jig to form a fixed position. When the pull portion 13 of the driving base 1 is rotated 90 degrees in the first direction, the abutting position of the abutting portion 111 can be moved from the first positioning area 411 through the guide slope. The second positioning area 413 is moved upwards by the cover 4 and the fixing member 3 to separate from the second through hole 60 of the second plate 6 and enter the unlocked state. At the same time, the two positioning blocks 12 of the base 1 move along the outer edge of the blocking ring 22 of the sleeve 2 to the adjacent limiting groove 221 to form a positioning; and when the pull portion 13 of the driving base 1 is rotated 90 degrees in the second direction, the stop block 12 can be locked. The holding position of the holding portion 111 moves from the second positioning area 413 through the guide ramp 412 to the first positioning area 411, and the cover 4 and the fixing member 3 move downward to extend into the second through hole 60 of the second plate 6 and enter a locked state. At the same time, the two positioning blocks 12 of the base 1 move along the outer edge of the blocking ring 22 of the sleeve 2 and return to the original limiting groove 221 to form a positioning. The advantage of the aforementioned structure is that the multiple limiting grooves 221 provided on the sleeve 2 provide abutment and limit for the multiple positioning blocks 12 of the base 1, ensuring precise positioning. This creates a graded feel during rotation and prevents over- or under-rotation. Furthermore, the multiple limiting grooves 221 and the multiple positioning blocks 12 provide abutment, ensuring smooth rotation of the fixing device during locking and unlocking.

The above is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Therefore, any simple modifications and equivalent structural changes made by applying the contents of the description and drawings of the present invention should be included in the patent scope of the present invention and should be declared.

In summary, the aforementioned fixing device of this invention is capable of achieving its intended purpose when in use. Therefore, this invention is truly a highly practical invention. To meet the application requirements for a patent, we have filed this application in accordance with the law. We hope that the Review Board will approve this application as soon as possible to protect the inventor's hard work. If the Review Board has any questions, please feel free to contact us. The inventor will fully cooperate and would be grateful for your assistance.

1: Base

10: Storage cavity

11: Subject

111: Support Department

112: Accommodation section

12: Positioning block

13: Trigger

2: Sleeve

20: Channel

21: Barrel

22: Stop ring

221: Limiting slot

24: Top

241: Limiting surface

3: Fixing parts

31: Shaft

311: Positioning surface

32: Joint

33: Clamp body

331: Shoulder

34: Elastic parts

4: Cover

41: Body

42: Fixed body

420: Snap-fit slot

5: First board

50: First through hole

501: Limit side

Claims (8)

A fixing device comprises: A base comprising a main body having a receiving cavity therein, a plurality of positioning blocks embossed on the surface of the receiving cavity, at least one higher abutting portion and at least one lower receiving portion formed on the main body, the abutting portion extending outwardly to form a pull portion; A sleeve comprising a barrel extending through the receiving cavity and having a passage therein, a stopper ring protruding outwardly formed on the bottom side of the barrel, the stopper ring having a plurality of retaining grooves for the positioning blocks to abut and position, and a fixing body extending downwardly from the bottom side of the stopper ring; A fixing member comprising a rod extending through the passage and having an elastic member disposed between the exterior of the rod and the sleeve. The rod has a joint at its top end and a latching member extending outward from its bottom end. The sleeve has a plurality of arcuate, sheet-like top portions formed on the top side of the barrel. Limiting surfaces are formed on the opposing inner walls of these top portions. Positioning surfaces are cut from the rod of the fixing member corresponding to these limiting surfaces; and A cover comprises a main body with a receiving chamber formed therein. The receiving chamber is upwardly connected to a locking groove for the anchor portion of the fixing member to be secured thereto. A first positioning area, a guide ramp, and a second positioning area are formed on the bottom side of the main body for the supporting portion and the receiving portion of the base to contact and receive each other. When the pull portion is driven to rotate in a first direction, the supporting portion can move from the first positioning area to the second positioning area via the guide ramp, thereby moving the cover and the fixing member upward to an unlocked state. When the pull portion is driven to rotate in a second direction, the supporting portion can move from the second positioning area to the first positioning area via the guide ramp, thereby moving the cover and the fixing member downward to a locked state. The fixing device as described in claim 1, wherein the pull portion of the base has an appearance similar to a hollow semicircular body, and the volume of the pull portion is larger than the main body. As described in claim 1, the outer wall of the fixing body of the sleeve is formed with an anti-rotation cutting edge, and the first through hole of the preset first plate has a limiting side corresponding to the anti-rotation cutting edge. A fixing device as described in claim 1, wherein the elastic member is composed of a spring. As described in claim 1, a shoulder is formed between the rod of the fixing member and the latch body for one end of the elastic member to abut and position, and the other end of the elastic member abuts and positions against the top bottom surface of the sleeve. A fixing device as described in claim 1, wherein the diameter of the latch body of the fixing member is larger than the rod body, and the diameter of the rod body is larger than the joint portion. As described in claim 1, a fixing device made of metal material is installed at the center of the top surface of the cover by embedding injection molding, and the locking groove is formed in the fixing body. A fixing device as described in claim 1, wherein the surface of the receiving cavity of the base is formed with two positioning blocks with a setting angle of 90 degrees apart; and the blocking ring of the sleeve is provided with three limiting grooves corresponding to the two positioning blocks, each of which is 90 degrees apart; if it is a unidirectional rotation, the number of the limiting grooves is equal to the number of the positioning blocks plus one; if it is a bidirectional rotation, the number of the limiting grooves is equal to the number of the positioning blocks plus two.