TWI443299B - Fixing apparatus for heat sink - Google Patents

Description

Radiator fixture

The present invention relates to a heat sink fixture.

In the prior art, a heat sink is fixed, usually a back plate having a plurality of female screws is first mounted on a circuit board, and then a plurality of fixing holes having a male screw are fixed through the fixing holes of the heat sink. The piece is locked into the corresponding female thread to fix the heat sink. Depending on the heat dissipation requirements, the heat sink usually needs to be installed at a predetermined angle. However, the mounting holes of many heat sinks are symmetrically designed and can be mounted to the backplane at different angles. In the absence of a foolproof design, the operator often incorrectly installs the angle of the heat sink, causing the components on the board to overheat and be damaged.

In view of the above, it is necessary to provide a fixing device for a heat sink having a foolproof function.

A heat sink fixing device for fixing a heat sink, the heat sink fixing device comprising a back plate mounted on a circuit board, a plurality of first locking members extending through the heat sink, and being disposed on the heat sink a second locking member, the back plate is provided with a plurality of first fixing posts having threaded holes and a second fixing column having external threads, and the lower portions of the first locking members are provided with external threads for locking respectively In the threaded hole of the first fixing post, the bottom of the second locking member is provided with a threaded hole to lock the second fixing post.

Compared with the prior art, the second fixing post and the second locking component of the heat sink fixing device have a foolproof effect, so that the heat sink can be mounted on the back plate only at an angle, and the heat sink can be prevented from being mounted on the back plate. The upper angle installation error.

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the heat sink fixture of the present invention can be used to fix a heat sink 60. The heat sink fixing device includes a backing plate 10 mounted on a circuit board, a first locking member 20 extending through the heat sink 60, and a second locking member 30 and a fourth through the heat sink 60. The spring 40 and the four are C-shaped retaining pieces 50.

The heat sink 60 includes a square bottom plate 61 and a plurality of heat dissipation fins 63 vertically disposed on the bottom plate 61. The bottom plate 61 is respectively provided with a through hole (not shown) adjacent to the four top legs. The four perforations are symmetrically disposed with respect to the center of the bottom plate 61.

The backing plate 10 has a square shape. A first fixing post 12 is protruded upwardly from the top surface of the back plate 10, and a second fixing post 14 is protruded upwardly from the other top corner. The three first fixing posts 12 and the second fixing post 14 are symmetrically disposed with respect to the center of the back plate 10 . A threaded hole 121 is defined downwardly at the top of each of the first fixing posts 12. The second fixing post 14 includes a stud 141 connected to the back plate 10 and a stud 143 having an external thread extending upward from the top of the stud 141. The back plate 10 is mounted on the circuit board at a predetermined angle with the second fixing post 14 as a mark.

Each of the first fasteners 20 includes a head portion 21, a column 23 extending downward from a central portion of the bottom surface of the head portion 21, and a threaded screw extending downward from a central portion of the bottom portion of the column body 23. Column 25. An annular groove 231 is defined in the lower portion of the cylinder 23 adjacent to the stud 25 . Each of the first fasteners 20 passes through a spring 40 and a predetermined perforation of the bottom plate 61 of the heat sink 60. The three-card security piece 50 is respectively inserted into the annular groove 231 of the three first fasteners 20 from the lower surface of the bottom plate 61 of the heat sink 60, so that the three first fasteners 20 are disposed on the heat sink 60. Scheduled perforations. The two ends of each spring 40 respectively abut the top surface of the corresponding first lock 20 and the top surface of the bottom plate 61 of the heat sink 60.

The second locking member 30 includes a head 31 and a cylinder 33 extending downward from a central portion of the bottom surface of the head portion 31. A threaded hole 331 is formed in the middle of the bottom surface of the column 33. The lower portion of the cylinder 33 is provided with an annular groove 333 adjacent to the bottom surface. The second locking member 30 passes through a spring 40 and another perforation of the bottom plate 61 of the heat sink 60. A card holder 50 is inserted from the bottom of the bottom plate 61 of the heat sink 60 into the annular groove 333 of the second fastener 30, so that the second fastener 30 is inserted through the predetermined through hole of the heat sink 60. The two ends of the spring 40 respectively abut the top surface of the second lock 30 and the top surface of the bottom plate 61 of the heat sink 60.

Referring to FIG. 3, since the backplane 10 has been previously mounted on the circuit board at the correct angle, the first lock 20 and the second lock 30 have been mounted to the heat sink 60 in the correct order. When the heat sink 60 is installed, the user only needs to adjust the angle of the heat sink 60 so that the second lock 30 mounted on the heat sink 60 faces the second fixing post 14 on the backboard 10, and the heat sink is disposed. The first fasteners 20 on the 60 are respectively opposite the first fixing posts 12 on the backing plate 10. Operating the first locking member 20 and the second locking member 30 to lock the studs 25 of the first locking members 20 into the threaded holes 121 of the first first fixing post 12, and to make the second The threaded hole 331 of the fastener 30 is locked to the stud 143 of the second fixing post 14, so that the heat sink 60 is mounted on the backboard 10 and the circuit board at a correct angle. Since the second fixing post 14 and the second locking member 30 have a foolproof effect, the heat sink 60 can be mounted on the backboard 10 only at an angle, so that the heat sink can be prevented from being mounted on the backboard at a wrong angle.

In the present embodiment, the springs 40 act to preload. In other embodiments, the springs 40 and the locking pieces 50 may be omitted, and the first locking members 20 and the cylinders 23 and 33 of the second locking member 30 are designed to be shorter, so that the first After the locking body 20 and the cylinders 23 and 33 of the second locking member 30 respectively pass through the corresponding perforations of the heat sink 60, the stud 25 and the threaded hole 331 can be locked to the corresponding first fixing post 12 and the second fixing. Column 14.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10. . . Backplane

12. . . First fixed column

121,331. . . Threaded hole

14. . . Second fixed column

141. . . Tab

143, 25. . . Stud

20. . . First lock firmware

21, 31. . . head

23, 33. . . Cylinder

231, 333. . . Ring groove

30. . . Second lock firmware

40. . . spring

50. . . Card

60. . . heat sink

61. . . Bottom plate

63. . . Heat sink fin

1 is an exploded perspective view of a preferred embodiment of a heat sink fixture of the present invention and a heat sink.

Fig. 2 is a view showing another direction of Fig. 1.

Fig. 3 is an assembled, isometric view of Fig. 2;

10. . . Backplane

12. . . First fixed column

331. . . Threaded hole

143, 25. . . Stud

20. . . First lock firmware

21, 31. . . head

23, 33. . . Cylinder

231, 333. . . Ring groove

30. . . Second lock firmware

40. . . spring

50. . . Card

60. . . heat sink

61. . . Bottom plate

63. . . Heat sink fin

Claims (6)

A heat sink fixing device for fixing a heat sink, the heat sink fixing device comprising a back plate mounted on a circuit board, a plurality of first locking members extending through the heat sink, and being disposed on the heat sink a second locking member, the back plate is provided with a plurality of first fixing posts having threaded holes and a second fixing column having external threads, and the lower portions of the first locking members are provided with external threads for locking respectively In the threaded hole of the first fixing post, the bottom of the second locking member is provided with a threaded hole to lock the second fixing post. The heat sink fixing device of claim 1, wherein the heat sink comprises a bottom plate, and the first fixing column and the second fixing column are symmetrically disposed with respect to a center of the back plate, the first lock The firmware and the second fastener are disposed on the bottom plate and symmetrically disposed with respect to a center of the bottom plate. The heat sink fixture of claim 2, wherein each of the first fasteners comprises a head, a cylinder extending downward from a central portion of the bottom surface of the head, and a bottom portion of the cylinder An externally threaded stud extending downwardly from the middle portion, the stud of each first locking member is inserted into the threaded hole of the corresponding first fixing post from the top to the bottom through the heat sink. The heat sink fixing device of claim 3, wherein the second fixing post comprises a stud connected to the back plate and a stud having an external thread extending upward from a top of the stud, The second locking device comprises a head and a cylinder extending downward from a central portion of the bottom surface of the head, the threaded hole of the second locking member is disposed at a middle portion of the bottom surface of the cylinder, and the cylinder is upward and downward After passing through the heat sink, the stud of the second fixing post is locked into the threaded hole of the second fastener. The heat sink fixing device of claim 4, further comprising a plurality of springs respectively sleeved on the cylinders of the first and second fasteners, wherein the two ends of each spring respectively abut the corresponding first The head of the second lock firmware or the first lock is attached to the top surface of the bottom plate of the heat sink. The heat sink fixing device of claim 5, further comprising a plurality of C-shaped retaining pieces, wherein the second locking member and the lower portion of each of the first locking members are provided with an annular groove, The card clamps are respectively inserted under the bottom plate of the heat sink into the annular grooves of the first lock and the second lock.