JP2001230356A - Radiator with clip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator having a clip, which prevents a radiator from being removed from a socket due to an impact and has an excellent attaching property. SOLUTION: This radiator with a clip is composed of a radiator 5 having a substrate 51 having a band-like planer portion 51A extending from the front edge to the rear edge on its upper surface and radiating fins 52 provided on portions on the upper surface of the substrate 51 except the band-like planar portion 51A and a clip for fixing the radiator 5 onto a socket 8, to which CPU is attached. The clip 1 is composed of a first clip section 2 and a second clip section 3, which are formed integrally from one metallic wire, and a radiator pressing section 4. The lower surface of the substrate 51 is pressed onto the CPU 6 with the radiator pressing section 4. Then, the two clip sections 2, 3 presss the radiator 5 and socket 8 from above so as not to be displaced in the back and forth direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator for radiating heat generated from an integrated circuit such as a CPU in an electronic device such as a personal computer, and more particularly, to a radiator provided with an integrated circuit. The present invention relates to a radiator having a clip fixed on a socket.

In this specification, the upper and lower sides of each drawing are referred to as upper and lower sides, the right side in FIGS. 4, 6 and 7 is referred to as a front, the opposite side is referred to as a rear side, and the left and right when viewed from the front to the rear are left and right. It is assumed that.

[0003]

2. Description of the Related Art For example, in a personal computer, a CPU having a package is mounted on a socket provided on a motherboard. 2. Description of the Related Art In recent years, personal computers have been significantly increased in function and processing speed, and accordingly, the output of the CPU has increased, and the amount of heat generated by the CPU has also increased significantly. Therefore, a radiator is arranged and fixed on the socket on which the CPU is mounted, and the heat from the CPU is efficiently radiated to the outside.

As a means for fixing a radiator on a socket, a device using a clip is known.

FIGS. 5 and 6 show an example of a fixing means using a clip. In these figures, a socket (8) is provided on a motherboard (9). Socket (8)
(81A) is formed. A trapezoidal projection (82) is formed on the front side of the socket (8). Then, on the portion of the socket (8) behind the trapezoidal projection (82), the package
(7) The attached CPU (6) is detachably attached. The radiator (15) includes a substrate (151) and a plurality of plate-shaped radiating fins (152) provided in parallel on the upper surface of the substrate (151) at predetermined intervals in the left-right direction. The clip (16) has a band-shaped base portion (161) disposed on a band-shaped flat portion (151A) between two innermost radiation fins (152) on the upper surface of the substrate (151).
A front and rear curved portion (162) formed in an upwardly convex shape at the front and rear ends of the base portion (161); and a lower portion extending from an outer end of the front and rear curved portion (162), and a projection (81A) on the front and rear side surfaces of the socket (8). ), The front and rear legs (16) having a through hole (163A) at the lower end in which the hole edge is fitted.
3). The clip (16) is formed by press-forming a metal thin plate such as a spring steel thin plate or a stainless steel thin plate, and has spring-like elasticity.

When fixing the radiator (15), first, the radiator
A heat conductive resin film (not shown) is adhered to the lower surface of the substrate (151) of (15), and the radiator (15) is arranged so that the film is in close contact with the upper surface of the CPU (6). Next, the base portion (161) of the clip (16) is disposed on the band-shaped flat portion (151A), and both the curved portions (162) are pushed downward, so that the through holes (163A) of the front and rear legs (163) are formed. ) Fit the edge to the projection (81A) on the front and rear side surfaces of the socket (8).

The clip (16) uses the spring-like elasticity to fix the radiator (15) on the socket (8) such that the lower surface of the substrate (151) is pressed against the CPU (6). Therefore, the present invention is applicable regardless of the type of the package (7) of the CPU (6).

[0008] One of the performance evaluations of the radiator fixing clip is impact resistance. This is an evaluation of the difficulty of detaching the radiator when a certain impact is applied to the radiator while the radiator is fixed on the socket using a clip. FIG. 7 shows the principle that the radiator (15) comes off the socket (8) by an impact when the radiator (15) is fixed on the socket (8) using the conventional clip (16). is there. Socket on motherboard (9)
When the radiator (15) is fixed to the (8) by the clip (16) (see FIG. 7 (a)), the required values of the socket (8) and the radiator (15) in the front and rear opposite directions due to an impact. When the above force acts, the radiator (15)
The board edge of the radiator (15) pushes the leg (163) of the clip (16) outwardly (see FIG. 7 (b)). (16) legs (16
The locking portion (163A) of (3) comes off the projection (81A) of the socket (8), and the radiator (15) comes off of the socket (8) (FIG. 7).
(C)). This is because the clip (16) uses the spring-like elasticity to push down the radiator (15).
On the socket (8), and the substrate (151) and C
This is because only the frictional resistance with the PU (6) prevents the radiator (15) from shifting in the front-rear direction. As a measure for preventing the radiator (15) from coming off the socket (8) due to an impact, a method of increasing the pressing load by the clip (16) is usually adopted. However, when the pressing load is increased, the force required for mounting the clip (16) also increases, and there is a problem that the mountability of the clip (16) deteriorates.

It is an object of the present invention to provide a radiator provided with a clip which is excellent in mounting properties while preventing the radiator from coming off the socket due to an impact.

[0010]

SUMMARY OF THE INVENTION A radiator with a clip according to the present invention has a substrate having a band-shaped flat portion or groove extending from a front edge to a rear edge on the upper surface and a band-shaped flat portion or groove on the upper surface of the substrate. A radiator provided with radiating fins provided on the other parts, and a clip for fixing the radiator on a socket on which the integrated circuit is mounted. The clip includes a first clip portion, a second clip portion, and a radiator holding portion formed integrally from one metal wire. A first clip portion, a band-shaped flat portion, a groove, or a base portion disposed above the band-shaped flat portion or the groove;
A first leg provided to be connected to a front end of the base portion and engaged with a front edge of the substrate; and a first leg provided to be connected to a rear end of the base portion and stopped by a projection formed on a rear side surface of the socket. And a second leg having a locking portion. The second clip portion is provided so as to be connected to the rear end of the base portion and the base portion disposed above the band-shaped flat portion, the groove or the band-shaped flat portion or the groove, and is engaged with the rear edge portion of the substrate. The socket includes a leg portion and a second leg portion provided to be connected to the front end of the base portion and having a locking portion that is stopped by a protrusion formed on the front side surface of the socket. The radiator holding portion includes a front and rear rising portion that extends upward from the lower ends of the first legs of both clip portions in a folded manner, a pressure contact portion pressed against a band-shaped flat portion or a groove, and an upper end and a pressure contact portion of the front and rear rising portion. It is provided with front and rear connecting portions to be connected respectively.

According to the radiator with the clip, the clip has the first leg portion in which the first clip portion is engaged with the front edge portion of the substrate, and the locking portion which is stopped by the projection formed on the rear side surface of the socket. A second leg portion having a second clip portion, the second clip portion being engaged with a rear edge portion of the substrate, and a locking portion stopped by a projection formed on a front side surface of the socket. And the second leg portion having the following structure, so that even when a force in the front and rear opposite directions acts on the socket and the radiator due to an impact, these clip portions allow
The radiator is reliably prevented from being displaced in the front-rear direction with respect to the socket and the CPU. Further, the radiator is pressed against the integrated circuit mounted on the socket by the radiator holding portion. That is, according to the radiator with a clip of the present invention, the first and second clips for preventing the radiator from being displaced from the socket due to an impact, separately from the radiator pressing portion for pressing the radiator to the socket, separately from the radiator pressing portion. The radiator can be securely prevented from coming off the socket due to an impact even if the pressing load by the radiator pressing part is not so large, without sacrificing the mountability. , Impact resistance can be improved.

In the radiator with a clip according to the present invention,
It is preferable that a hairpin-shaped outwardly protruding portion is provided between the base portion and the second leg portion of both clip portions of the clip when viewed from the side.

[0013] If such a hairpin-shaped outwardly projecting portion is provided between the base portion of each clip portion and the second leg portion, the length of the second leg portion can be shortened accordingly.
When the second leg is shortened, the second leg is less likely to bend in the front-rear direction when a force having a magnitude opposite to the front and rear is applied to the socket and the radiator due to an impact, so that the front and rear of the radiator are more reliably secured. The displacement in the direction can be prevented.

The front and rear rising portions of the radiator holding portion are
Preferably, it is as long as possible. In this case, the front-rear connection portion is generally formed in an inclined shape extending obliquely downward from the upper end of the rising portion toward one end of the press-contact portion. Thus, if the length of the front and rear rising portions is made as long as possible, these portions can easily move in the front and rear direction, and the pressing load of the clip does not become excessive. The front and rear connecting portions may be formed in an inclined shape as described above, or may be formed in an upwardly convex arc shape, for example.

The engaging portion provided on the second leg portion may have any shape as long as it can be stopped by the projections on the front and rear side surfaces of the socket. For example, the engaging portion may have an L shape, a hook shape, a loop shape, or the like. Done.

The base portions of the clip portions may be arranged on a flat band or a groove on the upper surface of the substrate, or may be arranged above the flat band or the groove. In the latter case, the base portion may be parallel to the band-shaped flat portion or the groove, or may be inclined forward or downward with respect to these.

The material and thickness of the metal wire forming the radiator fastener may be appropriately determined according to the required pressing load and the degree of deformability. The cross-sectional shape of the metal wire is not particularly limited, and may be a polygon other than a circle, such as a square. The metal wire having a rectangular cross section may be formed by cutting a metal plate into a required width.

The radiator includes a substrate having a band-shaped flat portion or groove extending from the front edge to the rear edge on the upper surface, and a radiation fin provided on a portion of the upper surface of the substrate other than the band-shaped flat portion or groove. The arrangement of the radiating fins and the shape of the radiating fins in the above portion are not particularly limited. For example, the heat radiation fins may be any of a tongue-shaped, pin-shaped, and plate-shaped fins. It is sufficient that at least one strip-shaped flat portion or groove extending from the front edge to the rear edge is formed on the upper surface of the substrate.
A plurality of these may be formed, and in that case, the radiator can be fixed on the socket using a plurality of radiator fasteners, if necessary. When a groove is formed on the upper surface of the substrate, its cross-sectional shape is not particularly limited. For example, in addition to a normal U-shaped groove, an internal enlarged groove such as a dovetail groove or an inverted T-shaped groove may be used.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. As shown in FIGS.
(1) A heatsink (5) is a CPU (6) having a package (7).
And a clip (1) for fixing the radiator (5) on the socket (8) to which the CPU (6) is attached.

The radiator (5) is, as shown in FIGS.
A substrate (51) having a band-shaped flat portion (511A) extending from the front edge to the rear edge at the center in the left-right direction of the upper surface, and predetermined in the front-rear direction on both left and right portions of the band-shaped flat portion (51A) on the upper surface of the substrate (51). A plurality of tongue-shaped radiating fins (52) provided in parallel at intervals
And

The radiator (5) is, for example, a plate-like aluminum (including an aluminum alloy; the same applies hereinafter) extruded on the upper surface thereof through a groove extending in the front-rear direction and two left and right fin forming portions. Prepare a material consisting of a shaped material, cut the left and right cut parts of this material forward and raise the heat radiation fins (52)
It is manufactured by forming

The CPU (6) with the package (7) and the socket (8) are as shown in FIGS. The protrusion (81) on the front surface of the socket (8) is formed at a position slightly closer to the left end of the side surface, and the protrusion (81) on the rear surface of the socket (8) is formed at a position closer to the right end of the same surface. These protrusions
(81) is a little oblong, and has a concave portion with a circular cross section on the lower surface. The structure of the other parts of the socket (8) and the structure of the CPU (6) with the package (7) are the same as those shown in FIGS.

As shown in FIGS. 1, 3, and 4, the clip (1) is a first metal wire integrally formed of a first metal wire.
A clip portion (2), a second clip portion (3) and a radiator holding portion (4).

The first clip portion (2) of the clip (1) has a base portion (21) which is disposed above the belt-shaped flat portion (51A) and is slightly inclined forward and a front end of the base portion (21). The first leg (22) is provided so as to be connected to the front edge of the board (51), and is provided so as to be connected to the rear end of the base (21). A second leg (23) having a locking portion (23A) to be stopped by the formed projection (81). A hairpin-shaped outwardly projecting portion (24) is provided between the base portion (21) and the second leg portion (23) when viewed from the side. The locking portion (23A) has an L-shape which is hooked on a projection (81) on the rear side surface of the socket (8), and its horizontal portion is a projection (81).
It fits into the recess on the lower surface.

The second clip portion (3) has a base portion (31) which is disposed above the band-shaped flat portion (51A) and slightly inclined forward.
A first leg (32), which is provided so as to be connected to the rear end of the base portion (31) and is engaged with a rear edge of the substrate (51); and is provided so as to be connected to a front end of the base portion (31). The socket
Locking part to be stopped on projection (81) formed on the front side of (8)
(33A). Base part
Between the (31) and the second leg (33), a hairpin-shaped outwardly protruding portion (34) is provided as viewed from the side. Locking part (33A)
Is L which is hooked on the projection (81) on the front side of the socket (8).
It is shaped like a letter, and its horizontal part fits into the recess on the lower surface of the projection (81).

The radiator holding portion (4) is provided with both clip portions (2).
(3) The front and rear rising portions (41) extending upward from the lower ends of the first leg portions (22) and (32) in a folded manner, and the press contact portions (42) pressed against the central portion in the front and rear direction of the band-shaped flat portion (51A). ) And an inclined front and rear connecting portion (43) for connecting the upper end of the front and rear rising portion (41) and the front and rear end of the press contact portion (42), respectively.

The radiator (5) with the clip (1) is connected to a CPU.
When fixing on the socket (8) to which (6) is attached, first, a heat conductive resin film (not shown) is adhered to the lower surface of the substrate (51) of the radiator (5), and this film is (6)
The radiator (5) is arranged so as to be in close contact with the upper surface. Next, base portions (21) and (31) of both clip portions (2) and (3) are strip-shaped flat portions (51).
Arrange the clip (1) so that it is located above A). Then, the first leg portions (22) and (32) of both clip portions (2) and (3) are attached to the radiator.
After engaging with the front and rear edges of (5), the locking portions (23A) (33A) of the second leg portions (23) (33) in both clip portions (2) and (3)
While pulling it outward to move it downwards.
When you release your hand over the protrusions (81) on the front and rear sides,
The elastically deformed locking parts (23A) (33A) are restored and the projections (81)
Stopped by being caught in. At the same time, the press contact portion (42) of the radiator holding portion (4) is pressed against the center in the front-rear direction of the band-shaped flat portion (51A). Thus, the radiator holder
The lower surface of the board (51) is pressed against the CPU (6) by (4), and the radiator (5) and the socket (8) are not displaced in the front-rear direction by the clips (2) and (3) from above. The radiator (5) is fixed on the socket (8) while being sandwiched.

[Brief description of the drawings]

FIG. 1 is a perspective view of a clip showing an embodiment of a radiator with a clip according to the present invention.

FIG. 2 is a perspective view showing a step of fixing a radiator provided with the clip of FIG. 1 on a socket.

FIG. 3 is a perspective view showing a state in which a radiator provided with the clip of FIG. 1 is fixed on a socket.

FIG. 4 is a vertical sectional view of a main part of FIG. 3;

FIG. 5 is a perspective view showing a step of fixing a radiator on a socket using a conventional clip made of a thin metal plate.

FIG. 6 is a vertical sectional view showing a state in which a radiator is fixed on a socket using a conventional metal thin plate clip.

FIG. 7 is a vertical cross-sectional view showing a principle that a heat sink is detached from a socket due to an impact when a radiator is fixed on the socket using a conventional thin metal plate clip.

[Explanation of symbols]

 (1): Clip (2): First clip part (21): Base part (22): First leg part (23): Second leg part (23A): Locking part (24): Outer protruding part (3): Second clip part (31): Base part (32): First leg part (33): Second leg part (33A): Locking part (34): Outer protruding part (4): Heat dissipation Container holding part (41): Rising part (42): Pressure contact part (43): Connecting part (5): Heat radiator (51): Board (51A): Flat strip part (6): CPU (integrated circuit) (7 ): Package (8): Socket (81): Projection

Continuation of the front page (72) Inventor Rei Sato 6, 224, Kaiyamacho, Sakai-shi, Showa Aluminum Co., Ltd. ) 3J001 FA02 GA03 GB01 HA02 HA04 JC02 JC07 JC12 KA26 KB06 5E322 AA01 AB04 AB07 5F036 AA01 BB05 BC09

Claims (2)

[Claims] 1. A radiator comprising: a substrate having a band-shaped flat portion or a groove extending from a front edge to a rear edge on an upper surface; and a radiator provided with a radiation fin provided on a portion of the upper surface of the substrate other than the band-shaped flat portion or the groove. And a clip that fixes the integrated circuit on a socket to which the integrated circuit is attached, wherein the clip is formed integrally from a single metal wire.
A clip portion, a second clip portion, and a radiator holding portion, wherein the first clip portion is connected to a band-shaped flat portion, a groove or a base portion disposed above the band-shaped flat portion or the groove, and to a front end of the base portion. A first leg provided and engaged with a front edge of the substrate; and a second leg provided so as to be connected to a rear end of the base and stopped by a projection formed on a rear surface of the socket. A second clip portion is provided so as to be connected to the rear end of the base portion and a base portion disposed above the band-shaped flat portion, the groove or the band-shaped flat portion or the groove. A first leg portion to be engaged with the second leg portion, the second leg portion being provided so as to be connected to the front end of the base portion, and having a locking portion which is stopped by a projection formed on a front side surface of the socket; , The first of both clip parts A front and rear rising portion extending upward in a folded manner from the lower end of the portion, a pressure contact portion pressed against a band-shaped flat portion or a groove, and a front and rear connection portion connecting the upper end of the front and rear front rising portion and the pressure contact portion, respectively. Heatsink with clip. 2. The radiator with a clip according to claim 1, wherein a hairpin-shaped outward projection is provided between the base portion and the second leg portion of each of the clip portions of the clip when viewed from the side.