DE29609057U1 - Heatsink mounting device for securing a heat sink to a CPU holder - Google Patents

Description

Ming Der Chiou, 3F, No. 4, Alley 11, Lane 327, Sec. 2, Chung Shan Rd., Chung Ho City, Taipei, Taiwan, R.O.C.

Heatsink mounting device for securing a heatsink to a CPU holder

Background of the invention

The present invention relates to a heatsink fixing device suitable for fixing to a CPU holder for securing a heatsink to the CPU holder.

Various heat sinks have been developed for use with a fan to remove heat from the CPU of an electronic device, such as a computer. Various devices and methods for securing heat sinks to CPU holders have also been disclosed. Since mechanical devices have manufacturing tolerances and tend to expand when heated and shrink when cooled,

2827

Bremen:

Hoüerallec 32, D-28209 Bremen
POB 10 71 27, D-28071 Bremen

Telephone (04 21) 3 40 90
Telephone (04 21)3 491768
Telex 244 953 bopat d

Munich:

Franz-Joseph-Strasse 38 D-80801 Munich

Telephone (0 891 34 70 80 Fax (0 39) 34 70 10 Telex 524 2e2forbod

Berlin-Brandenburg: Düsseldorf: Leipzig: Kiel:

Helene-Lange-SrtBe 3 ·· ••NeSleWtraSji·. .**. JJditff-R*ft*t{al-Stia8i 21 Nieraannsweg 133

D-14469 Potsdam Il ' ...D-lj593eiteeld«tf · · B+H03 Leiprig D-24105 Kiel

Telephone (03 3M 27 54 30 · · -»:&Igr;&phgr;&pgr;&ogr;&pgr;·(02 ^J »1 S9.3^· Telejtftn («5 41) 9 60 29 77 Telephone (04 31) 8 40 75

Fax (03 3*1) 5 *5 43*21 Fax (0211)7 18 27 50 Fax (03 41)3103 25 Fax (04 3!) 8 40 77

Alicante:

Plaza Calvo Sotelo 1-2 ES-03001 Alicante .Spain)

Telephone t34-6-598 0O38 Fax +34-S.5S3 01S2

the connection between a heatsink and a CPU holder becomes loose after a long time of use. If the connection between a heatsink and a CPU holder is loose, heat cannot be effectively transferred from the CPU to the heatsink.

Summary of the invention

The present invention has been accomplished to provide a heat sink fixing device that eliminates the above problem. According to an embodiment of the present invention, the heat sink fixing device comprises a fixing frame set on a heat sink and having downward hooks each hooked to a CPU holder to secure the heat sink and the CPU holder to each other, and a plurality of springs mounted in respective upper blind holes in the heat sink to apply upward pressure to the fixing frame, thereby firmly holding the downward hooks of the fixing frame in the engaged position. Thus, the spring force of the springs automatically compensates for the manufacturing tolerances of the heat sink and the CPU holder, and automatically regulates the clamping force of the downward hooks of the fixing frame to overcome the amount of deformation of the heat sink and the CPU holder due to the temperature effect.

Short description of the drawings

Fig. 1 is an exploded view of a heat sink mount

device according to the present invention;

Fig. 2 is an elevation view of the heatsink mounting device shown in Fig. 1;

Fig. 3 is a sectional view taken along line A-A of Fig. 2;

Fig. 4 is a sectional view taken along line B-B of Fig. 2; and

Fig. 5 is an elevation view of an alternative embodiment of the present invention.

Detailed description of the preferred embodiments

Referring to Fig. 1, a heat sink fixing device according to the present invention generally comprises a fixing frame 1 and a plurality of springs 3. The fixing frame 1 is made of elastic material and comprises a flat plate 101, an opening 102 in the center of the flat plate 101 corresponding to the fan 201 in the heat sink 2, two pairs of first legs 103a, 103b, 103c, 103d and two pairs of second legs 104a, 104b, 104c, 104d each rising from two opposite sides of the flat plate 101. The first legs 103a, 103b, 103c, 103d are each longer than the second legs 104a, 104b, 104c, 104d. The first legs 103a, 103b, 103c, 103d have a respective lower end which is arranged in an internal hook area

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105a ends. The second legs 104a, 104b, 104c, 104d have a respective lower end which ends in an internally arranged hook region 105b. The hook regions 105a of the first legs 103a, 103b, 103c, 103d are each arranged at a lower height than the hook regions 105b of the second legs 104a, 104b, 104c, 104d. The heat sink 2 has a plurality of upper blind holes 202a, 202b, 202c, 202d arranged in the four corners thereof, which receive the respective springs 3, and a plurality of fixing grooves 203a, 203b, 203c, 203d arranged on two sides on the bottom corresponding to the second legs 104a, 104b, 104c, 104d of the fastening frame 1.

The assembly of the heat sink mounting structure is simple and outlined below with reference to Figs. 1, 2 and 3. When the springs 3 are respectively inserted into the blind holes 202a, 202b, 202c, 202d of the heat sink 2, the mounting frame 1 is placed on the heat sink 2 and secured thereto by forcing the hook portions 105b of the second legs 104a, 104b, 104c, 104d into engagement with the fixing grooves 203a, 203b, 203c, 203d.

Referring to Fig. 4, the CPU holder 4 has an upper connecting plate 401 for connecting to the bottom of the heat sink 2 and a shoulder 402 rising from the bottom of the connecting plate 401. By forcing the hook portions 105a of the first legs 103a, 103b, 103c, 103d into engagement with the shoulder 402, the fixing frame 1 is fixed to the CPU holder 4 to keep the heat sink 2 in contact with the connecting plate 401.

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When the hook portions 105a of the first legs 103a, 103b, 103c, 103d are moved downward along the outer wall of the shoulder 402 into engagement with the underside thereof, the hook portions 105b of the second legs 104a, 104b, 104c, 104d are simultaneously moved downward from the fixing grooves 203a, 203b, 203c, 203d. Since the flat plate 101 of the mounting frame 1 is held on the springs 3, the springs 3 exert an upward pressure on the flat plate 101 after installation of the mounting frame 1 in the CPU holder 4, thereby causing the hook portions 105a of the first legs 103a, 103b, 103c, 103d to be held firmly in engagement with the underside of the shoulder 402.

Fig. 5 shows an alternative embodiment of the present invention. According to this alternative embodiment, the first legs 103a, 103b, 103c, 103d have a respective loop-like projection 106a, 106b, 106c, 106d in the middle and two substantially U-shaped fixing rods 107a, 107b are bilaterally connected to the loop-like projections 106a, 106b, 106c, 106d of the two pairs of first legs 103a, 103b, 103c, 103d to prevent the first legs 103a, 103b, 103c, 103d from being pulled outward. If the first legs 103a, 103b, 103c, 103d are pulled outward excessively, the hook portions 105a may be pulled away from the shoulder of the CPU holder.

It should be understood that the drawings are for illustration purposes only and are not intended to be used to determine the limits and scope of the invention disclosed.

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1 until d d Mounting frame 2 until d Heatsink 3 , 105b Spring element 4 until d CPU holder 101 , b d flat plate 102 Center opening 103a until Legs 104a until Legs 105a Hook 106a Projections 107a Fixing rods 201 Fan 202a Blind holes 203a Fixing grooves 401 Connecting plate 402 shoulder

Claims (6)

Ming Der Chiou, 3F, No. 4, Alley 11, Lane 327, Sec. 2, Chung Shan Rd., Chung Ho City, Taipei, Taiwan, R.O.C. Heatsink mounting device for securing a heatsink to a CPU holder Claims 1. Heat sink fastening device with a fastening frame (1) suitable for placing on a heat sink (2) and fastening to a CPU holder (4) in order to secure the heat sink (2) and the CPU holder (4) to one another, and a plurality of spring elements (3) suitable for connecting the fastening frame (1) and the heat sink (2) in order to
outward pressure on the mounting frame
(1) from the heat sink (2), wherein the mounting frame
(1) a flat plate (101) with a central opening (102) and two sets of long legs {103a,
103b, 10 3c, 103d) extending vertically and downwards from two opposite sides of the plane 2827 Bremen: Holleraliee 32, D-28209 Bremen
POB 10 7127, D-28071 Bremtn Telephone (04 21) 3 40 90
Fax (04 21)3 4917 68
Telex 244 958 bopat d Munich: Franz-Joseph-Stieße 38 D-80801 Monchen Kiel: Niemannsweg 133 Berlin-Brandenburg: Düsseldorf: Leipzig: D-14469 Poßdan» · · ··· D«4059S rSisselioS I Je*U03 Leipzig Telephone (0 89) 3470 80 Telephone (03 JlJ 27 54 30· · ·&Tgr;««&Lgr;&Lgr;&igr; (02 lfl 7t 89« Telephone<(0341) 9 6029 77 Telephone (04 31) 8 40 75 Fax (089)347010 Fax (03 31)27543 21 Fax (0211)7182750 Fax (0341)310325 Fax (0431)84077 Tekfsx (0 89)34 7010
Telex 524 282forbod Alicante: Plaza Calvo Sotelo 1-2 ES-03001 Alicante (Spain) Telephone+34-6-598 0038 TelUlax +34-e-5?S0ia2 BOEHMEftf ;& Plate (101) and each end in a respective inward-facing hook (105a) for fastening the CPU holder (4). 2. Heat sink fastening device according to claim 1, characterized in that the spring elements (3) are helical springs. 3. Heat sink fastening device according to claim 1 or 2, characterized in that the heat sink (2) has a plurality of upper blind holes (202a, 202b, 202c, 202d) for receiving the spring elements (3), which (3) to partially protrude from the blind bores (202a, 202b, 202c, 202d). 4. Heat sink fastening device according to one of claims 1 to 3, characterized in that the fastening frame (1) further comprises two sets of short legs (104a, 104b, 104c, 104d) provided with hooks (105b), which rise vertically and downwards from two opposite sides of the flat plate (101) and are suitable for hooking into the heat sink (2). 5. Heat sink fastening device according to claim 4, characterized in that the heat sink (2) has a plurality of fixing grooves (203a, 203b, 203c, 203d) for engagement with the short legs (104a, 104b, 104c, 104d) of the fastening frame (1) provided with a hook (105b). 6. Heat sink mounting device according to one of the preceding claims, characterized in that the CPU Holder (4) comprises a shoulder (402) for engagement with the long legs (103a, 103b, 103c, 103d) of the mounting frame (1) provided with a hook (105a).