CN219958984U - Combining components of heat dissipation unit and heat dissipation unit thereof - Google Patents

Abstract

The utility model relates to a combination element of a heat radiation unit and a heat radiation unit thereof, wherein four corners of the heat radiation unit are assembled with a heating source in a bare crystal form by arranging the combination element, and the combination element is provided with a screw, a sleeve with a containing space and a clamping and rotating ring; the screw is provided with a spring in a penetrating way, the tail section of the screw is provided with a retaining ring for preventing the spring from falling off, and the screw and the spring are arranged in the accommodating space of the sleeve; the sleeve is provided with at least one notch communicated with the accommodating space; the clamping and rotating ring is arranged at the upper end of the sleeve, a curled tongue piece is arranged at the lower side of the clamping and rotating ring, and the tongue piece extends into the accommodating space from the notch to clamp the spring in a buckling manner, so that the spring is in a compressed state; when the heat dissipation unit is to be combined with the heat source in the bare crystal form for heat exchange, the clamping ring is rotated to enable the tongue piece to release the clamping of the spring to release the spring, so that the spring provides uniform and synchronous downward pressure of the heat dissipation unit on the heat source in the bare crystal form.

Description

Combining components of heat dissipation unit and heat dissipation unit thereof

Technical field

The utility model relates to a combination component of a heat dissipation unit and a heat dissipation unit thereof, and in particular to a heat dissipation unit that can provide synchronized and uniform downward pressure, thereby preventing the bare crystal type heat source and the heat dissipation unit from being out of sync and uneven due to contact force. The combined components of the heat dissipation unit and its heat dissipation unit that cause damage or generate thermal resistance.

Background technique

In order to provide high-efficiency computing capabilities for electronic devices, high-efficiency and high-power chips are currently used. When the chip performs calculations, it generates a very high amount of heat. The traditional computing chip has a packaging shell outside, and the packaging shell encapsulates the chip. It is wrapped inside to protect the chip from damage. As the computing performance of the chip increases, the chip will generate a higher temperature than traditional ones when performing computing work. In addition, the packaging shell packaged on the outside of the chip has seriously affected the chip. The efficiency of heat dissipation and outward heat conduction; therefore, most chips on the market have been changed to bare crystal form. However, because the surface of the bare die is not flat, it is in the shape of a convex arc, and the unprotected shell causes its heat exchange contact surface. It is small and has low strength, so it is easy to be damaged and cracked when combined with the heat dissipation device.

In addition, when the traditional heat dissipation device is fixed above the heat source (bare die), a single locking point is used to lock it in sequence, which causes the locking time points to be out of sync and prone to contact tilt. The die cannot withstand such unevenness. Pressure can easily cause problems such as chip breakage and damage.

Refer to Figure 1 and Figure 2, which are schematic diagrams of the combination of an existing heat dissipation device and a bare chip. The heat source A (bare crystal type) is set up on a substrate D. The four outer sides of the heat source A are correspondingly set on the substrate D. There is a copper pillar B with an internal thread in the corner. The heat dissipation device C is also provided with four holes C3 corresponding to the position of the copper pillar B and is provided with screw units C1. A spring C2 is set on the outside of these screw units C1. When the heat dissipation device C is locked and combined with the heat source A, the screw locking operation is usually carried out directly at a single point by manual or mechanical arm operation of an electric screwdriver. In order to speed up the assembly time on the production line and complete it within the limited assembly time, Usually, each fixing screw is quickly and directly locked into place. When the screw units C1 are locked to a fixed point one by one, the spring C2 sleeved on the screw unit C1 also resists in the direction of the heat source A. , and the uneven force caused by the single-point locking will directly cause a collision with the heat source. As mentioned above, the heat source A (bare crystal) is brittle, but the single-point screw unit C1 locking and the pressure of the spring C2 are not suitable for In addition to the fact that heat source A (bare chip) cannot provide complete and comprehensive (four corners of the bare chip) simultaneous and uniform downward pressure, the bare chip is easily damaged due to uneven stress.

Furthermore, the bare crystal is quite fragile. As mentioned above, the four corners of the bare crystal must be simultaneously synchronously provided with uniform downward pressure to provide bonding force for combination. The downward pressing force can easily cause the heat sink or heat dissipation device and the heat source (bare chip) to warp, incompletely fit, or cause damage and other defects. It can also easily form thermal impedance, which will cause insufficiency in heating. Otherwise, thermal conduction failure occurs.

Therefore, how to improve the heat dissipation device to be complete and comprehensive, synchronized and provide uniform pressure to closely fit the heat source; how to maintain the appropriate bonding force between the bare die and the heat dissipation device; and how to perform repeated installation or adjustment, etc. This is the primary problem currently being addressed by the industry.

Utility model content

Therefore, in order to effectively solve the above problems, the main purpose of the present invention is to provide a combination component of a heat dissipation unit and its heat dissipation unit, which can provide a synchronous and uniform downward force of the heat dissipation unit on the bare crystal type heat source. It effectively avoids the phenomenon that a single locking point is locked first, causing the corners of the bare crystal type heat source to crack or crack.

The utility model provides a combination component of a heat dissipation unit, which is characterized in that it includes:

A screw has a nut head on its upper end and a plurality of external threads on its lower end. The screw is provided with a buckle adjacent to the plurality of external threads. A spring is sleeved on the outside of the screw. The spring has a top end and a bottom end. , the bottom end abuts the buckle;

A sleeve has an upper end, a lower end and an accommodating space. The accommodating space is connected to the upper end and the lower end respectively. The sleeve is recessed inward near the upper end and has at least one gap connected to the accommodating space. , the screw passing through the spring is arranged in the accommodation space of the sleeve;

A snap ring is provided at the upper end of the sleeve. The lower edge of the snap ring is provided with an extension portion downward. The extension portion is curled toward the center of the snap ring and is provided with at least one tongue piece. The tongue piece is formed by the aforementioned The notch of the sleeve extends into the accommodating space and is used to press and hold the top end of the spring so that the spring is in a compressed state.

The coupling element of the heat dissipation unit, wherein: the notch has an upper edge, the tongue has an upper surface and a lower surface, the upper surface of the tongue is supported on the upper edge of the notch, and the tongue The lower surface of the piece is supported by the top end of the spring, and the spring is compressed and restricted in the accommodation space of the sleeve through the tongue piece.

In the coupling element of the heat dissipation unit, the tongue piece is in a curled shape.

In the coupling element of the heat dissipation unit, the outer surface of the circlip ring has at least one convex portion, and the convex portion can be used for rotating the circlip ring.

In order to achieve the above purpose, the present invention provides a heat dissipation unit, which is characterized in that it includes:

A heat dissipation unit body is provided with an upper surface, a lower surface, at least four through holes and a heat receiving area. The at least four through holes penetrate the upper and lower surfaces of the heat dissipation unit body and are located at the four corners of the periphery of the heat receiving area. , the at least four through holes are each provided with a coupling element;

The coupling element has a screw. The upper and lower ends of the screw respectively have a nut head and a plurality of external threads. After the external threads of the screw pass through the through hole of the body, a buckle is provided. One side surface of the buckle ring Adhered to the lower surface of the heat dissipation unit body, a spring is set around the outside of the screw, and the spring has a top end and a bottom end;

A sleeve has an upper end, a lower end and an accommodating space. The accommodating space is connected to the upper end and the lower end respectively. The sleeve is recessed inward near the upper end and has at least one gap connected to the accommodating space. , the screw with the spring is arranged in the accommodation space of the sleeve, and the lower end of the sleeve and the bottom end of the spring are jointly placed against the upper surface of the heat dissipation unit body;

A snap ring is provided at the upper end of the sleeve. The lower edge of the snap ring is provided with an extension portion downward. The extension portion is curled toward the center of the snap ring and is provided with at least one tongue piece. The tongue piece is formed by the aforementioned sleeve. The notch of the barrel extends into the accommodating space and is used to press and lock the top of the spring so that the spring is in a compressed state within the sleeve.

The heat dissipation unit, wherein: the tongue piece of the snap ring can rotate the snap ring clockwise or counterclockwise, so that the tongue piece extends into or out of the sleeve from the gap. accommodation space.

The heat dissipation unit, wherein: the notch has an upper edge, the tongue has an upper surface and a lower surface, the upper surface of the tongue is supported on the upper edge of the notch, and the tongue has an upper edge. The lower surface is supported by the top end of the spring, and the spring is compressed and restricted within the accommodation space of the sleeve through the tongue.

In the heat dissipation unit, the tongue piece is in a curled shape, and the outer surface of the snap ring has at least one convex portion, and the convex portion can be used to rotate the snap ring.

When in use, first align the heating area of the heat dissipation unit body with the bare crystal type heat source, and then perform a preliminary preliminization by setting an external thread on one end of the screw of the fixing unit and the base plate provided with the bare crystal type heat source. At this time, the springs are still compressed in the internal space of the sleeve. After the fixing units at the four corners have completed the initial pre-screw locking position, the tongue can be retracted (moved) by rotating the snap ring. ) to remove the gap in the sleeve, and at the same time remove the pressure of the tongue on the top of the spring, so that the springs provide synchronous and uniform downward pressing force on the four corners of the heat dissipation unit body, so that the heat dissipation unit The main body and the heat source of the bare crystal type can be in stable and close contact, which avoids the uneven force that causes the corners to crack or chip, or the thermal resistance caused by incomplete conformity. It also avoids excessive pressure during the screw locking process. A large situation may cause the heat source (bare chip) to crack and be damaged.

Description of the drawings

Figure 1 is a schematic diagram of the existing heat dissipation unit and bare chip combination.

Figure 2 is a schematic diagram of the existing heat dissipation unit and bare chip combination.

Figure 3 is a three-dimensional exploded view of the coupling components of the heat dissipation unit of the present invention.

Figure 4 is a cross-sectional view of the combined components of the heat dissipation unit of the present invention.

Figure 5 is a three-dimensional exploded view of the heat dissipation unit of the present invention.

Figure 6 is a schematic diagram of the operation of the heat dissipation unit of the present invention.

Figure 7 is a schematic diagram of the operation of the heat dissipation unit of the present invention.

Explanation of reference signs: combination element 1; screw 11; nut head 111; equal external threads 112; annular groove 113; sleeve 12; upper end 121; lower end 122; accommodation space 123; notch 124; upper edge 1241 ; Snap ring 13; Tongue 132; Inner edge surface 1321; Upper surface 1322; Lower surface 1323; Projection 133; Spring 14; Top end 141; Bottom end 142; Buckle 15; Heat dissipation unit 2; Heat dissipation unit body 21; upper surface 211; lower surface 212; through hole 213; heating area 214; bare crystal type heat source 3; fixed structure 4.

Detailed ways

The above objects and structural and functional characteristics of the present invention will be explained based on the preferred embodiments of the accompanying drawings.

Please refer to Figures 3 and 4, which are decomposed and assembled views of the coupling components of the heat dissipation unit of the present invention. As shown in the figure, the coupling components of the heat dissipation unit include: a screw 11, a spring, a sleeve 12, a Snap ring 13;

The upper and lower ends of the screw 11 respectively have a nut head 111 and a plurality of external threads 112, and an annular groove 113 is provided above the screw 11 adjacent to the plurality of external threads 112. The annular groove 113 113 is provided with a buckle 15, which can be an E-type or C-type buckle. The spring 14 is sleeved on the outside of the screw 11. The two ends of the spring 14 have a top end 141 and a bottom end 142 respectively. The bottom end 142 abuts one side of the buckle 15 , and the buckle 15 provides an axial downward limit for the spring 14 to prevent the spring 14 from being detached from the screw 11 at one end with a plurality of external threads 112 11.

The sleeve 12 is a tube body with an accommodating space 123 inside. The upper and lower ends of the sleeve 12 have an open upper end 121 and a lower end 122 respectively. The accommodating space 123 is between the Between the upper and lower ends and connected with the upper end 121 and the lower end 122 , the sleeve 12 is provided with at least one strip-shaped notch 124 inward near the upper end 121 , and the notch 124 communicates with the accommodation space 123 , the screw 11 and the spring 14 are located in the accommodation space 123 of the sleeve 12 .

The snap ring 13 is an annular body (or circular body), which can be disposed directly or at intervals at the upper end 121 of the sleeve 12 and cooperates with the sleeve 12 in a movably rotatable manner. The snap ring 13 The inner diameter is greater than or equal to the outer diameter of the sleeve 12. In the embodiment of the present invention, the inner diameter of the circlip ring is selected to be larger than the outer diameter of the sleeve. The lower edge of the circlip ring 13 is provided with an extension downward. The extension At least one tongue piece 132 is curled inward toward the center of the snap ring 13. The tongue piece 132 can be formed by curling and extending in a clockwise or counterclockwise manner toward the center of the snap ring 13, and the tongue piece 132 The piece 132 extends into the accommodating space 123 from the notch 124 of the sleeve 12 to press and lock the top end 141 of the spring 14 so that the spring 14 is in a compressed state in the sleeve 12 .

The tongue pieces 132 can be single or plural in pairs, and are formed by curling clockwise and counterclockwise toward the center of the snap ring 13 respectively. The tongue pieces 132 are in the shape of a curled ring (whirl). , and the tongue piece 132 has an inner edge surface 1321. When the snap ring 13 is rotated, the tongue piece 132 enters (extends) into or retreats (moves) out of the notch 124 of the sleeve 12. Accommodation space 123.

In addition, the outer surface of the extended portion of the snap ring 13 may have at least one convex portion 133, which can be used to more conveniently apply force when rotating the snap ring 13 or to be used in conjunction with a corresponding machine tool or fixture. The snap ring 13 The tongue piece 132 of the sleeve 13 can enter or exit the accommodation space 123 of the sleeve 12 through the notch 124 of the sleeve 12 by rotating the snap ring 13 clockwise or counterclockwise.

The notch 124 of the sleeve 12 has an upper edge 1241. The tongue 132 has an upper surface 1322 and a lower surface 1323. The upper surface 1322 of the tongue 132 is axially supported by the upper edge 1241 of the notch 124. To limit the position, the lower surface 1323 of the tongue piece 132 presses the top end 141 of the spring 14 to compress and restrict the spring 14 in the accommodation space 123 of the sleeve 12 .

Please refer to Figure 5, Figure 6, and Figure 7, which are three-dimensional exploded views and schematic diagrams of the operation of the heat dissipation unit of the present invention. As shown in the figures, the present invention provides a method of using the aforementioned combination component 1 to provide a heat dissipation unit 2 and a bare body. The crystalline heat sources 3 can have uniform adhesion and pressure. In this embodiment, the combination of the aforementioned bonding elements 1 is used on the heat dissipation unit 2 to provide even force adhesion with the bare crystal heat source 3. The effect is achieved, and since the coupling element 1 has been completely illustrated and described in the foregoing embodiments, the detailed structure of each component of the coupling element 1 will not be described again in this embodiment.

The heat dissipation unit 2 has a heat dissipation unit body 21. The upper and lower sides of the heat dissipation unit body 21 are respectively provided with an upper surface 211 and a lower surface 212, at least four through holes 213 and a heat receiving area 214. The heat receiving area 214 The at least four through holes 213 are located at the four corners of the periphery of the heat receiving area 214 and penetrate the upper and lower surfaces 211 and 212 of the heat dissipation unit body 21. The at least four through holes 213 are respectively provided with the aforementioned coupling elements 1. The coupling elements 1 are inserted through the through holes 213 through the external thread 112 at one end of the screw 11, and then the buckle 15 is clamped on In the annular groove 113 , the upper surface of the buckle 15 is attached to the lower surface 212 of the heat dissipation unit body 21 to prevent the screw 11 from being pulled out of the through hole 213 in the axial direction.

The screw 11 and the spring 14 are disposed in the receiving space 123 of the sleeve 12 together. The upper end 141 of the spring 14 is pressed by the tongue 132 of the snap ring 13 and is compressed and limited to the sleeve. Inside the accommodating space 123 of 12, the lower end 122 of the sleeve 12 and the bottom end 142 of the spring 14 are pressed against the upper surface 211 of the heat dissipation unit body 21, so that the coupling element 1 is assembled in the heat dissipation unit. On body 21. The sleeve 12 can also be directly formed integrally with the upper surface 211 of the heat dissipation unit body 21 , and other components (parts) are sequentially combined with the sleeve 12 through plugging or sleeve installation.

When the heat dissipation unit 2 wants to provide the die-type heat source 3 (heat exchange or heat conduction), it first passes through the plurality of external threads 113 of the coupling element 1 corresponding to the die-type heat source 3 loaded therein. A fixed structure 4 (stud with internal thread) on the base plate is preliminarily pre-locked and fixed. At this time, the spring 14 sleeved on the outside of the screw 11 has not yet released its elastic force, and the heat dissipation unit 2 is only lightly ( Micro) is placed above the bare crystal type heat source 3 without any pressure on the bare crystal type heat source 3, that is, the surface (lower surface) of the heat receiving area 214 of the heat dissipation unit 2 is only lightly (Micro) contact is made against the upper surface of the bare crystal type heat source 3 . In order for the heat dissipation unit 2 to provide synchronous and uniform downward pressure on the die-type heat source 3, the coupling elements 1 located outside the four corners of the heat receiving area 214 of the heat dissipation unit 2 must simultaneously and synchronously release the compressed The spring 14 is used to provide the heat dissipation unit 2 with a uniform downward pressing force for the die-type heat source 3 .

In this way, in order to simultaneously and synchronously release the springs 14 compressed and limited in the sleeve 12 of each coupling element 1, and then synchronously release the compressed spring force, it can be done through an automated equipment (not shown in the figure) or manually. Manually and with hand tools, the snap rings 13 on each coupling element 1 are rotated synchronously clockwise or counterclockwise, so that the tongues 132 of all the snap rings 13 can simultaneously remove the restrictions on the springs 14 This allows all the springs 14 to simultaneously restore their upward supporting and downward resisting forces, thereby providing a uniform downward sticking force of the heat dissipation unit 2 relative to the bare crystal heat source 3 . Therefore, the heat dissipation unit 2 of the present invention can provide the heat source 3 of the die type with comprehensive synchronization and uniform downward bonding pressure, thereby improving the uneven stress caused by the existing single locking point and forcing the die to be damaged. etc. are missing.

Claims (8)

1. A combination component of a heat dissipation unit, characterized in that it includes: A screw has a nut head on its upper end and a plurality of external threads on its lower end. The screw is provided with a buckle adjacent to the plurality of external threads. A spring is sleeved on the outside of the screw. The spring has a top end and a bottom end. , the bottom end abuts the buckle; A sleeve has an upper end, a lower end and an accommodating space. The accommodating space is connected to the upper end and the lower end respectively. The sleeve is recessed inward near the upper end and has at least one gap connected to the accommodating space. , the screw passing through the spring is arranged in the accommodation space of the sleeve; A snap ring is provided at the upper end of the sleeve. The lower edge of the snap ring is provided with an extension portion downward. The extension portion is curled toward the center of the snap ring and is provided with at least one tongue piece. The tongue piece is formed by the aforementioned The notch of the sleeve extends into the accommodating space and is used to press and hold the top end of the spring so that the spring is in a compressed state. 2. The coupling element of the heat dissipation unit according to claim 1, wherein the notch has an upper edge, the tongue has an upper surface and a lower surface, and the upper surface of the tongue is supported on the At the upper edge of the notch, the lower surface of the tongue is supported by the top end of the spring, and the spring is compressed and limited by the tongue into the accommodation space of the sleeve. 3. The coupling element of the heat dissipation unit according to claim 1, wherein the tongue piece is in a curled shape. 4. The coupling element of the heat dissipation unit according to claim 1, wherein the outer surface of the snap ring has at least one protrusion, and the protrusion is used for rotating the snap ring. 5. A heat dissipation unit, characterized in that it includes: A heat dissipation unit body is provided with an upper surface, a lower surface, at least four through holes and a heat receiving area. The at least four through holes penetrate the upper and lower surfaces of the heat dissipation unit body and are located at the four corners of the periphery of the heat receiving area. , the at least four through holes are each provided with a coupling element; The coupling element has a screw. The upper and lower ends of the screw respectively have a nut head and a plurality of external threads. After the external threads of the screw pass through the through hole of the body, a buckle is provided. One side surface of the buckle ring Adhered to the lower surface of the heat dissipation unit body, a spring is set around the outside of the screw, and the spring has a top end and a bottom end; A sleeve has an upper end, a lower end and an accommodating space. The accommodating space is connected to the upper end and the lower end respectively. The sleeve is recessed inward near the upper end and has at least one gap connected to the accommodating space. , the screw with the spring is arranged in the accommodation space of the sleeve, and the lower end of the sleeve and the bottom end of the spring are jointly placed against the upper surface of the heat dissipation unit body; A snap ring is provided at the upper end of the sleeve. The lower edge of the snap ring is provided with an extension portion downward. The extension portion is curled toward the center of the snap ring and is provided with at least one tongue piece. The tongue piece is formed by the aforementioned sleeve. The notch of the barrel extends into the accommodating space, and is used to press and lock the top of the spring, so that the spring is in a compressed state in the sleeve. 6. The heat dissipation unit of claim 5, wherein the tongue piece of the snap ring can rotate the snap ring clockwise or counterclockwise, so that the tongue piece moves from the notch of the sleeve. Extend into or out of the sleeve's accommodation space. 7. The heat dissipation unit of claim 5, wherein the notch has an upper edge, the tongue has an upper surface and a lower surface, and the upper surface of the tongue is supported by the notch. At the upper edge, the lower surface of the tongue is supported by the top end of the spring, and the spring is compressed and limited by the tongue into the accommodation space of the sleeve. 8. The heat dissipation unit of claim 5, wherein the tongue piece is curled, and the outer surface of the snap ring has at least one protrusion, and the protrusion is used for rotating the snap ring.