Fixing device

Abstract

The invention provides a fixing device, which comprises a base, which comprises a main body and an accommodating cavity, a plurality of positioning blocks are formed in the accommodating cavity, an abutting part and an accommodating part are formed on the main body, and the abutting part extends towards the outer side to form a pulling part; the sleeve comprises a sleeve body and a channel, a blocking ring body and a plurality of limiting grooves are formed on the bottom side of the sleeve body, and a fixing body is arranged on the bottom side of the blocking ring body; the fixing piece comprises a rod body, an elastic piece is arranged between the outer part of the rod body and the sleeve, and the rod body comprises a connecting part and a clamping body; and the cover cap comprises a body and an accommodating chamber, the accommodating chamber is upwards communicated with a clamping groove for clamping the connecting part of the fixing piece, and a first positioning area, a guide slope ramp and a second positioning area for abutting and accommodating the abutting part and the accommodating part of the base are formed on the bottom side of the body.

Description

Technical Field

[0001] This invention relates to a fixing device, and more particularly to a fixing device in which a sleeve is riveted to a first plate through a bottom fixing body. When the driving lever rotates in a first direction, the abutting position of the supporting part moves from the first positioning area to the second positioning area via a guide ramp, and the cover and fixing member move upward to disengage from the second through hole of the second plate, thus entering an unlocked state. When the driving lever rotates in a second direction, the abutting position of the supporting part moves from the second positioning area to the first positioning area via a guide ramp, and the cover and fixing member move downward to insert into the second through hole of the second plate, thus entering a locked state. Simultaneously, the multiple limiting grooves provided on the sleeve allow multiple positioning blocks of the base to provide abutment and limit, ensuring clear positioning. This results in a segmented feel during rotation and prevents over- or under-rotation. Furthermore, the multiple limiting grooves combined with the multiple positioning blocks provide abutment, ensuring smooth rotation of the fixing device during locking and unlocking. Background Technology

[0002] When assembling typical panel-to-panel connectors, a positioning screw with knobs, collars, and screws is used for locking. The screws and collars are fixed to the first panel, and force is applied to the knob to lock the screw into the second panel to form a predetermined positioning. After tightening the screw with a hand tool, the first and second panels are locked and fixed as one unit. This locking method can be used in telecommunications cabinets, industrial computer cases, machine tool panels, etc., for panel-to-panel connections on equipment composed of multiple knobs, screws, and other devices and mechanisms.

[0003] However, if users or on-site workers do not wear appropriate hand tools during the operation, it will affect the overall assembly and disassembly process. Therefore, some manufacturers have developed another positioning device that allows on-site workers or users to perform panel-to-panel assembly, fixing, or disassembly by hand rotation. Please refer to [link to relevant documentation]. Figure 8 , Figure 9As shown in the figure, it can be clearly seen that the conventional positioning device has a through hole A1 inside the sleeve A, and a limiting ring A2 protrudes from the outer edge of the top of the sleeve A. The surface of the limiting ring A2 is cut with a plurality of grooves A21 arranged at intervals. Between any two adjacent grooves A21, the limiting ring A2 forms two first ring edges A22 with an enlarged outer diameter, and two other two second ring edges A23 with a reduced outer diameter on opposite peripheries, which are arranged alternately with the two first ring edges A22. A1 contains a rotating rod B1 with a swivel element B inserted inside. A rotating rod B2 passes through the bottom of the rotating rod B1. A rod head B3 protrudes from the outside of the sleeve A at the top of the rotating rod B1. An elastic body B4 is fitted onto the rotating rod B1 to abut against the inside of the through hole A1. An outer sleeve C is assembled outside the swivel element B, and an mounting space C1 is formed inside the outer sleeve C for assembling the rod head B3. One side of the mounting space C1 has a longitudinally displaced cover that covers the outside of the limiting ring A2. A sliding hole C2 is provided, and two opposing long protrusions C21 and two opposing short protrusions C22 are respectively provided on the inner wall surface of the sliding hole C2. Each long protrusion C21 and short protrusion C22 is respectively aligned and locked in the grooves A21 on the outer edge of the limiting ring A2. The top of the outer side of the outer sleeve C is provided with a pointed lever C3 facing outward. The top surface of the outer sleeve C is provided with an indicator C4 with open and close markings. When the sleeve A is positioned in the preset positioning plate (not shown in the figure) After being installed, the rotating rod B1 of the buckle element B can be driven by the outer sleeve C to move longitudinally up and down along the through hole A1 of the sleeve A, so that the rotating rod B2 of the buckle element B passes through the hole of the preset fixed plate (not shown in the figure). Then, by turning the lever C3 of the outer sleeve C to rotate the outer sleeve C clockwise or counterclockwise by 90 degrees, the rotating rod B2 is rotated and locked at the bottom surface of the preset fixed plate, thereby achieving the goal of locking the preset positioning plate and the preset fixed plate together by hand.

[0004] However, because the two first ring edges A22 and two second ring edges A23 of the limiting ring A2 of the sleeve A are staggered, and the two long protrusions C21 and 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 simultaneously in the direction of the two second ring edges A23 with smaller outer diameter. As a result, the outer sleeve C can only be used by reciprocating rotation in one direction (clockwise or counterclockwise) whether it is locked or unlocked. Therefore, after the rotating rod B2 of the buckle element B is locked to the preset fixed plate, the subsequent user cannot know whether the buckle element B is locked or unlocked by rotating it (because locking or unlocking both involve rotating 90 degrees). This will affect the time and smoothness of the overall disassembly and assembly operation. This process is not only time-consuming and inconvenient, but also requires the further machining of an indicator C4 on the top surface of the outer sleeve C to understand the locking and unlocking direction of the positioning device, thus increasing the cost of the machining operation. Whether the outer sleeve C is locked or unlocked, it is used by reciprocating rotation. The two long protrusions C21 and two short protrusions C22 of the outer sleeve C are located at the limiting ring A2 and rotate. If the force of operating the outer sleeve C is too large or too fast, the two long protrusions C21 and two short protrusions C22 may cross the groove A21 to be locked and rotate to the next groove A21, resulting in an improper locking situation. It is also quite easy to cause friction wear and other defects between the two long protrusions C21 and two short protrusions C22 and the multiple grooves A21, the two first ring edges A22, and the two second ring edges A23.

[0005] Therefore, how to solve the problems and shortcomings of the current positioning device when applying force to rotate the outer sleeve, which is easy to cause the rotation to exceed the positioning position due to excessive force, is the direction that relevant manufacturers in this industry are eager to research and improve. Summary of the Invention

[0006] Therefore, in view of the above-mentioned problems and deficiencies, the main objective of the present invention is to provide a fixing device for an interface card.

[0007] The present invention provides a fixing device, comprising: a base including a main body and a receiving cavity, wherein a plurality of positioning blocks are formed in the receiving cavity, and a supporting portion and a receiving portion are formed on the main body, wherein the supporting portion extends outward to form a lever portion; a sleeve including a cylindrical body and a channel, wherein a stop ring and a plurality of limiting grooves are formed on the bottom side of the cylindrical body, and a fixing body is provided on the bottom side of the stop ring; a fixing member including a rod body and an elastic member provided between the outside of the rod body and the sleeve, wherein the rod body includes a connecting portion and a locking body; and a cover including a main body and a receiving chamber, wherein the receiving chamber is connected upward 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 the supporting portion and the receiving portion of the base to abut and receive.

[0008] The sleeve of the fixing device is riveted to the first plate through a bottom fixing body. When the driving lever rotates in the first direction, the abutting position of the supporting part moves from the first positioning area to the second positioning area via a guide ramp, and the cover and fixing member move upward to disengage from the second through hole of the second plate, thus entering an unlocked state. When the driving lever rotates in the second direction, the abutting position of the supporting part moves from the second positioning area to the first positioning area via a guide ramp, and the cover and fixing member move downward to insert into the second through hole of the second plate, thus entering a locked state. At the same time, the multiple limiting grooves provided on the sleeve can provide abutment and positioning for the multiple positioning blocks of the base, thus creating a segmented feel when rotating and preventing over- or under-rotation. Furthermore, the multiple limiting grooves combined with the multiple positioning blocks provide abutment, ensuring that the fixing device rotates smoothly during locking and unlocking.

[0009] The lever part of the base has an appearance that is approximately a hollow semi-circular body, and the volume of the lever part is larger than that of the main body.

[0010] The sleeve has a plurality of arc-shaped tops on its top side, and each of the plurality of tops has a limiting surface on its inner wall. The rod of the fastener has a positioning surface cut into it at the corresponding limiting surface.

[0011] The cover has a metal fixing body installed at the center of its top surface using an injection molding process, and the locking groove is formed in the fixing body.

[0012] The base has two positioning blocks with a 90-degree angle between them on the surface of the receiving cavity; the sleeve has three limiting grooves with a 90-degree angle between them corresponding to the two positioning blocks in the stop ring body; when rotating in one direction, the number of limiting grooves is equal to the number of positioning blocks plus one; when rotating in two directions, the number of limiting grooves is equal to the number of positioning blocks plus two.

[0013] The advantages of this invention are: the multiple limiting grooves provided on the sleeve can provide a support and limit for the multiple positioning blocks of the base and make the positioning clear, so that the rotation has a segmented feel and is not easy to over-rotate or under-rotate. In addition, the multiple limiting grooves combined with the multiple positioning blocks provide a support, which can ensure that the fixing device maintains stable rotation during locking and unlocking. Attached Figure Description

[0014] Figure 1 This is a perspective view of the fixing device of the present invention in the locked state.

[0015] Figure 2 This is an exploded perspective view of the fixing device of the present invention.

[0016] Figure 3 This is an exploded perspective view of the fixing device of the present invention.

[0017] Figure 4 This is a side cross-sectional view of the fixing device of the present invention in the locked state.

[0018] Figure 5 This is a side cross-sectional view of the fixing device of the present invention in the unlocked state.

[0019] Figure 6 This is a top cross-sectional view of the fixing device of the present invention in the locked to unlocked state.

[0020] Figure 7 This is a perspective view of the fixing device of the present invention in the unlocked state.

[0021] Figure 8 This is a three-dimensional exploded view of a known positioning device.

[0022] Figure 9 This is an exploded three-dimensional view of a known positioning device.

[0023] Explanation of reference numerals in the attached drawings: 1-Base; 10-Receiving cavity; 11-Main body; 111-Supporting part; 112-Accommodating part; 12-Positioning block; 13-Actuating part; 2-Sleeve; 20-Channel; 21-Cylinder body; 22-Stop ring; 221-Limiting groove; 23-Fixing body; 231-Anti-rotation cut edge; 24-Top; 241-Limiting surface; 3-Fixing component; 31-Rod; 311-Positioning surface; 32-Connecting part; 33-Clamping body; 331-Shoulder; 34-Elastic component; 4-Cover; 40-Accommodating chamber; 41-Main body; 411-First positioning area; 412 - Guide ramp; 413- Second positioning area; 42- Fixing body; 420- Engaging groove; 5- First plate; 50- First through hole; 501- Limiting side; 6- Second plate; 60- Second through hole; A- Sleeve; A1- Through hole; A2- Limiting ring; A21- Groove; A22- First ring edge; A23- Second ring edge; B- Rotary element; B1- Rotating rod; B2- Rotating rod; B3- Rod head; B4- Elastic body; C- Outer sleeve; C1- Installation space; C2- Sliding hole; C21- Long protruding rod; C22- Short protruding rod; C3- Lever part; C4- Indicator part. Detailed Implementation

[0024] To achieve the above objectives and effects, the technical means and structure adopted by the present invention are described in detail below with reference to the accompanying drawings, so as to facilitate a complete understanding.

[0025] Please see Figures 1-3The figures shown are a perspective view of the fixing device of the present invention in the locked state, an exploded perspective view of the fixing device, and an exploded perspective view from another angle. As can be clearly seen from the figures, the present invention provides a fixing device, mainly comprising: a base 1, a sleeve 2, a fixing member 3, and a cover 4. Its main components and features are detailed below:

[0026] The base 1 includes a main body 11 and a receiving cavity 10 inside the main body 11. A plurality of positioning blocks 12 are raised on the surface of the receiving cavity 10. At least one abutting part 111 at a higher position and at least one receiving part 112 at a lower position are formed on the main body 11. The abutting part 111 extends outward to form a levering part 13.

[0027] The sleeve 2 includes a cylindrical body 21 that passes through the receiving cavity 10 and has a channel 20 inside the cylindrical body 21. A stop ring 22 that protrudes outward is formed on the bottom side of the cylindrical body 21 and has a plurality of limiting grooves 221 for the plurality of positioning blocks 12 to be supported and positioned. A fixing body 23 extends further downward on the bottom side of the stop ring 22.

[0028] The fastener 3 includes a rod 31 that passes through the channel 20 and an elastic element 34 between the outside of the rod 31 and the sleeve 2. The elastic element 34 is made of a spring. The top end of the rod 31 has a connecting part 32 and a locking body 33 is formed by expanding outward from the bottom end of the rod 31.

[0029] The cover 4 includes a body 41 with an internal receiving chamber 40. The receiving chamber 40 is connected upward to a locking groove 420 for the connecting portion 32 of the fixing member 3 to be secured. On the bottom side of the body 41 are formed a first positioning area 411, a guide ramp 412, and a second positioning area 413 for the abutment portion 111 and the receiving portion 112 of the base 1 to abut and receive each other. When the lever portion 13 is driven to rotate in the first direction, it can... The holding position of the holding part 111 is moved from the first positioning area 411 to the second positioning area 413 via the guide ramp 412, and the cover 4 and the fixing member 3 are moved upward to the unlocked state; when the lever part 13 is driven to rotate in the second direction, the holding position of the holding part 111 is moved from the second positioning area 413 to the first positioning area 411 via the guide ramp 412, and the cover 4 and the fixing member 3 are moved downward to the locked state.

[0030] The lever part 13 of the aforementioned base is approximately a hollow semi-circular body, and the volume of the lever part 13 is larger than that of the main body 11. The larger lever part 13 is used to generate a longer torque and make it easier to apply force.

[0031] The base 1 has two positioning blocks 12 with an angle of 90 degrees apart on the surface of the receiving cavity 10. The sleeve 2 has three limiting grooves 221 with an angle of 90 degrees apart in the stop ring body 22 corresponding to the two positioning blocks 12. When rotating in one direction, the number of limiting grooves 221 is equal to the number of positioning blocks 12 plus one. When rotating in two directions, the number of limiting grooves 221 is equal to the number of positioning blocks 12 plus two.

[0032] The sleeve 2 has a plurality of arc-shaped tops 24 on the top side of the body 21. Each of the plurality of tops 24 has a limiting surface 241 on its inner wall. The rod 31 of the fastener 3 has a positioning surface 311 cut into it at the limiting surface 241. With the above structure, the fastener 3 will not rotate relative to the sleeve 2. The outer wall of the fixing body 23 of the sleeve 2 has an anti-rotation cutting edge 231. The first through hole 50 of the first plate 5 has a limiting side 501 at the anti-rotation cutting edge 231. With the above structure, the sleeve 2 will not rotate relative to the first plate 5.

[0033] The aforementioned fixing member 3 has a shoulder 331 between the rod 31 and the locking body 33 for the elastic member 34 to be positioned and held at one end, and the other end of the elastic member 34 is positioned and held at the bottom surface of the top 24 of the sleeve 2; the diameter of the locking body 33 of the fixing member 3 is larger than that of the rod 31, and the diameter of the rod 31 is larger than that of the connecting part 32.

[0034] A metal fixing body 42 is installed at the center of the top surface of the cover 4 by an insert molding process, and the engaging groove 420 is formed in the fixing body 42.

[0035] When assembling the fixing device of the present invention, first, the elastic member 34 is placed outside the rod 31 of the fixing member 3 and one end is held against the shoulder 331. Then, the connecting part 32 of the fixing member 3 is inserted into the channel 20 of the sleeve 2 from bottom to top, and the positioning surface 311 of the rod 31 is aligned with the limiting surface 241 of the sleeve 2, and the connecting part 32 of the fixing member 3 is exposed above the top 24 of the sleeve 2 to form a pre-position. At the same time, the other end of the elastic member 34 is held against the bottom surface of the top 24 of the sleeve 2. Next, the sleeve 2 is inserted into the receiving cavity 10 of the base 1 from bottom to top, and the limiting groove 221 of the sleeve 2 is made to contact and position with the positioning block 12 of the base 1. Finally, the engaging groove 420 of the cover 4 engages and fixes the connecting part 32 of the fixing member 3 from top to bottom, and the first positioning area 411 of the cover 4 is made to contact with the supporting part 111 of the base, and the second positioning area 413 is made to contact with the receiving part 112, thereby forming a tight joint structure between the cover 4 and the main body 11 of the base 1. The assembly of the fixing device is completed by the above.

[0036] Please see Figures 4-7 The figures shown are a side sectional view of the fixing device of the present invention in the locked state, a side sectional view of the unlocked state, a top sectional view of the device from the locked to the unlocked state, and a perspective view of the device in the unlocked state, and are also shown in the references to the present invention. Figure 1 As disclosed, when the fixing device is actually used to fix two plates, the fixing body 23 on the bottom side of the sleeve 2 is aligned with the first through hole 50 on the first plate 5, and the anti-rotation cut edge 231 on one side of the fixing body 23 is aligned with the limiting side on the side of the first through hole 50. Then, the fixing device is stamped and riveted to the first plate 5 from top to bottom by a stamping fixture to form a fixation. When the lever part 13 of the drive base 1 rotates 90 degrees in the first direction, the abutting position of the abutting part 111 can be moved from the first positioning area 411 to the second positioning area 413 via the guide ramp 412, and the cover 4 and the fixing member 3 can be moved upward to disengage from the second plate 6. When the two through holes 60 are in the unlocked state, the two positioning blocks 12 of the base 1 move along the outer edge of the stop ring 22 of the sleeve 2 to the adjacent limiting groove 221 to form a positioning. When the lever part 13 of the driving base 1 rotates 90 degrees in the second direction, the abutting position of the abutting part 111 can be moved from the second positioning area 413 to the first positioning area 411 via the guide ramp 412, and the cover 4 and the fixing member 3 move downward to extend into the second through hole 60 of the second plate 6 to form a locked state. At the same time, the two positioning blocks 12 of the base 1 move along the outer edge of the stop ring 22 of the sleeve 2 back to the original limiting groove 221 to form a positioning. The advantages of the aforementioned structure are: the multiple limiting grooves 221 provided on the sleeve 2 can provide a support and limit for the multiple positioning blocks 12 of the base 1 and make the positioning clear, so that the rotation has a segmented feel and is not easy to rotate too much or too little. In addition, the multiple limiting grooves 221, together with the multiple positioning blocks 12, can ensure that the fixing device maintains stable rotation during locking and unlocking.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the patent. Therefore, any simple modifications and equivalent structural changes made using the description and drawings of the present invention should also be included within the scope of the patent of the present invention.

Claims

1. A fixture, characterized in that The application relates to a base, a sleeve, a fixing member and a cover. The base comprises a main body with a receiving cavity, a plurality of positioning blocks formed on the surface of the receiving cavity, at least one higher-positioned abutting part and at least one lower-positioned accommodating part formed on the main body, and a pulling part extended outward from the abutting part. The sleeve comprises a sleeve body arranged in the receiving cavity and having a channel, an outwardly protruding stop ring arranged on the bottom side of the sleeve body and having a plurality of limiting grooves for abutting and positioning the positioning blocks, and a fixing body extended downward from the bottom side of the stop ring. The fixing member comprises a rod arranged in the channel and having an elastic member between the rod and the sleeve, an engaging part at the top end of the rod, and a clamping body expanded outward from the bottom end of the rod. The cover comprises a body with a accommodating chamber, a clamping groove for clamping the engaging part of the fixing member communicated upwardly with the accommodating chamber, a first positioning area, a guide slope and a second positioning area formed on the bottom side of the body for abutting and accommodating the abutting part and the accommodating part of the base, and a pulling part.

2. The fixture of claim 1, wherein: When the pulling part is driven to rotate in a first direction, the abutting position of the abutting part is changed from the first positioning area to the second positioning area through the guide slope, and the cover and the fixing member are moved upwardly to an unlocked state.

3. The fixture of claim 1, wherein: When the pulling part is driven to rotate in a second direction, the abutting position of the abutting part is changed from the second positioning area to the first positioning area through the guide slope, and the cover and the fixing member are moved downwardly to a locked state.

4. The fixture of claim 1, wherein: The pulling part of the base is a hollow semicircular body, and the volume of the pulling part is larger than that of the main body.

5. The fixture of claim 1, wherein: The top side of the sleeve body is provided with a plurality of arc-shaped top parts, and the inner walls of the top parts are provided with limiting surfaces.

6. The fixture of claim 1, wherein: The outer wall of the fixing body of the sleeve is provided with a rotation-preventing cutting edge, and the first limiting side of the first through hole of the first plate is arranged at the rotation-preventing cutting edge.

7. The fixture of claim 1, wherein: The elastic member is a spring.

8. The fixture of claim 1, wherein: The rod of the fixing member and the clamping body are provided with a shoulder part for abutting and positioning one end of the spring, and the other end of the spring is abutted and positioned on the bottom surface of the top part of the sleeve.

9. The fixture of claim 1, wherein: The diameter of the clamping body of the fixing member is larger than that of the rod, and the diameter of the rod is larger than that of the engaging part. The top surface of the cover is provided with a fixing body of metal material arranged by embedding and injection, and the clamping groove is arranged in the fixing body. The surface of the receiving cavity of the base is provided with two positioning blocks with an angle of 90 degrees, and the stop ring of the sleeve is provided with three limiting grooves with an angle of 90 degrees. If the sleeve is rotated in one direction, the number of limiting grooves is equal to the number of positioning blocks plus one. If the sleeve is rotated in two directions, the number of limiting grooves is equal to the number of positioning blocks plus two.

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