Assembling type metal cooling fin

Abstract

The utility model discloses an assembling type metal radiating fin, which comprises a heat-conducting fin and a connecting strip, the heat-conducting fin is positioned on one side of a PCB (printed circuit board), a heat-conducting silica gel sheet is clamped between the heat-conducting fin and the PCB, a plurality of radiating plates are fixed on one side, far away from the PCB, of the heat-conducting fin, the connecting strip is sleeved on the outer sides of the heat-conducting fin and the PCB, and the connecting strip is connected with the connecting strip. A fastening assembly is connected between the two ends of the connecting strip, the fastening assembly comprises a connecting box fixed to one end of the connecting strip, supporting rotary drums are fixedly embedded in the inner walls of the two sides of the connecting box, a center penetrating rod is rotationally connected between the two supporting rotary drums, and a through groove and a forward screwing knob are arranged in the middle of the center penetrating rod; the driving worm can be driven to rotate, the driving worm drives the driven worm gear to rotate, the driven worm gear drives the center penetrating rod to rotate, in the process, the connecting strip is continuously wound on the outer side of the center penetrating rod, the connecting strip can be fully tightened, and the heat-conducting piece and the heat-conducting silica gel piece are tightly attached to the PCB.

Description

Technical Field

[0001] The utility model relates to the technical field of heat sinks, in particular to an assembleable metal heat sink. Background Art

[0002] Heat sinks are referred to as heat sinks. In the field of electronic engineering design, they are classified as "passive heat dissipation components". They are made of metals with good thermal conductivity, light weight, and easy processing (mostly aluminum or copper, silver is too expensive and generally not used) attached to the heating surface to dissipate heat in a composite heat exchange mode. They can be used for CPU (circuit board) heat dissipation. The heat dissipation of the CPU (circuit board) is mainly achieved by conduction. After the heat sink absorbs the heat, it dissipates the heat in the form of convection. In the process of convection heat dissipation, the heat dissipation area is mainly determined by the surface area of ​​the heat sink fins. The larger the surface area, the better the heat dissipation effect, and the smaller the surface area, the worse the heat dissipation effect. The commonly used means in the industry mainly include: increasing the number of heat sink fins and increasing the length of the heat sink fins. One of the data reflected is the "thickness-to-height ratio", that is, the ratio of the thickness and height of the heat sink fins. The smaller this value means that the heat sink fins per unit volume can be made denser, the more the number, the larger the effective heat dissipation surface area, and the better the heat dissipation performance.

[0003] Chinese patent announcement number CN218897412U discloses an assembleable metal heat sink, which tears off the protective paper on the first adhesive strip of the first heat sink, then takes a third heat sink, aligns it with the first adhesive strip for bonding, then slides the third clamping blocks on the upper and lower sides of the third heat sink, and pushes one end of the third clamping block into the first slide slot, thereby further fixing the first heat sink and the third heat sink; then tears off the protective paper on the third adhesive strip of the third heat sink, then takes the second heat sink, aligns it with the first adhesive strip for bonding, then slides the second clamping blocks on the upper and lower sides of the second heat sink, and pushes one end of the second clamping block into the third slide slot, thereby further fixing the second heat sink and the third heat sink; if the size of the electronic component is large, several third heat sinks can be pasted and assembled between the first heat sink and the second heat sink in the above-mentioned assembly method;

[0004] In the above technology, the metal heat sink is spliced ​​and fixed to the electronic components by bonding. It is fixed with the electronic components as an integrated structure, which is not conducive to later maintenance and disassembly. How to achieve a detachable connection between the metal heat sink and the electronic components while ensuring the heat conduction effect has become a new topic. To this end, the utility model provides a new type of assembleable metal heat sink for solving the above problem. Utility Model Content

[0005] The purpose of the utility model is to provide an assembleable metal heat sink to solve the problem proposed in the above background technology that the traditional metal heat sink is fixed to the electronic components by bonding, and the metal heat sink and the electronic components are fixed as an integrated structure, which is not conducive to later maintenance and disassembly. How to achieve a detachable connection between the metal heat sink and the electronic components while ensuring the heat conduction effect has become a new issue.

[0006] To achieve the above purpose, the utility model solves the above technical problems as follows:

[0007] An assembleable metal heat sink comprises a heat conducting sheet and a connecting strip, wherein the heat conducting sheet is located on one side of a PCB board, a heat conducting silicone sheet is clamped between the heat conducting sheet and the PCB board, a plurality of heat dissipation plates are fixed on the side of the heat conducting sheet away from the PCB board, a connecting strip is jointly sleeved on the outer sides of the heat conducting sheet and the PCB board, and a fastening component is connected between the two ends of the connecting strip.

[0008] As a further solution of the utility model, the fastening assembly includes a connecting box fixed at one end of the connecting strip, and supporting rotating cylinders are fixedly embedded on the inner walls on both sides of the connecting box. A through rod is rotatably connected between the two supporting rotating cylinders, and a through groove is provided in the middle of the through rod.

[0009] As a further solution of the utility model, the other end of the connecting strip passes through the connecting box and the through-slot to be fixedly connected to the limit stop column, and the connecting box is provided with a notch to allow the connecting strip to pass through.

[0010] As a further solution of the utility model, a drive box is fixed on one side of the connecting box, one end of the through rod extends into the drive box and is fixedly connected to a driven worm gear, the other end of the drive box is rotatably connected to a drive worm, the drive worm is transmission-connected to the driven worm gear, and one end of the driving worm's rotating shaft passes through the drive box and is fixedly connected to a knob, and a S-shaped groove is provided on the end surface of the knob.

[0011] As a further solution of the utility model, a limiting groove is provided on a side of the heat conducting plate away from the PCB board, and the width of the limiting groove is consistent with the width of the connecting strip.

[0012] As a further solution of the utility model, a plurality of the heat dissipation plates are arranged parallel to each other, and the intervals between adjacent heat dissipation plates are consistent.

[0013] As a further solution of the utility model, a plurality of limiting columns are arranged on a side of the heat conducting sheet away from the heat sink, and corresponding slots are arranged on the heat conducting silicone sheet corresponding to the limiting columns.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The assembled metal heat sink can be rotated forward by turning the knob to drive the driving worm to rotate, the driving worm drives the driven worm wheel to rotate, and the driven worm wheel drives the through-core rod to rotate. During this process, the connecting strip is continuously wound around the outside of the through-core rod, and the connecting strip can be fully tightened to make the heat conducting sheet, the heat conducting silicone sheet and the PCB board close to each other, which is suitable for PCB boards of different sizes. Conversely, by turning the knob in the reverse direction, the connecting strip can be adjusted to be loose, which can facilitate the installation and removal process of the heat conducting sheet and facilitate the maintenance or cleaning of the PCB board.

[0016] 2. The assembleable metal heat sink can transfer the running heat of the PCB board to the heat conductive sheet through the heat conductive silicone sheet, and the heat conductive sheet disperses the heat to each heat sink. The air cooling mechanism can quickly reduce the heat of the PCB board to prevent the PCB board from overheating. The heat dissipation effect is good. The heat conductive silicone sheet overcomes the shortcomings of poor heat conduction between the PCB board and the heat conductive sheet, and can obtain efficient heat conduction effect without adhesive fixation;

[0017] 3. The knob of the assembled metal heat sink is located on the side of the connection box away from the PCB board. The knob can be easily rotated by a flat-blade screwdriver. The operation is convenient and quick, suitable for operation in a small space, and suitable for precision electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a three-dimensional diagram of an assembleable metal heat sink of the utility model;

[0020] Figure 2 It is a side view of an assembleable metal heat sink of the utility model;

[0021] Figure 3 This is a bottom view of an assembleable metal heat sink of the utility model;

[0022] Figure 4 This is a cross-sectional view of the internal structure of a connection box in an assembleable metal heat sink of the utility model;

[0023] Figure 5 This is a connection structure diagram of a through rod and a connection strip in an assembleable metal heat sink of the utility model;

[0024] Figure 6 The utility model is a combined structural diagram of a heat-conducting sheet and a heat-conducting silicone sheet in an assembleable metal heat sink.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Heat conducting sheet; 11. Limiting groove; 12. Limiting column; 2. Connecting strip; 21. Limiting stop column; 3. PCB board; 4. Thermal conductive silicone sheet; 5. Heat sink; 6. Fastening assembly; 61. Connecting box; 62. Supporting drum; 63. Through-hole rod; 64. Through-groove; 65. Missing groove; 66. Driving box; 67. Driven worm gear; 68. Driving worm; 69. Knob. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the embodiments.

[0028] See also Figure 1-6 The utility model provides an assembleable metal heat sink, comprising a heat conducting sheet 1 and a connecting strip 2, wherein the heat conducting sheet 1 is located on one side of a PCB board 3, and a plurality of heat dissipating plates 5 are fixed on the side of the heat conducting sheet 1 away from the PCB board 3;

[0029] Specifically, the heat conducting sheet 1, the connecting strip 2 and the heat sink 5 are all made of aluminum material with low cost, and the aluminum connecting strip 2 has a certain plasticity and can be pressed and shaped according to the shape of the PCB board 3, and is suitable for PCB boards 3 of different sizes.

[0030] Furthermore, the plurality of heat dissipation plates 5 are arranged parallel to each other, and the spacing between adjacent heat dissipation plates 5 is consistent;

[0031] Specifically, the heat sinks 5 arranged in parallel can reduce the wind resistance of the heat dissipation airflow, and the heat sinks 5 effectively expand the heat dissipation area and improve the heat exchange efficiency;

[0032] Optionally, the spacing between the heat sink plates 5 is between 1 cm and 2 cm, which can effectively control the resistance of the heat dissipation airflow while maximizing the use of the surface area of ​​the heat conductive sheet 1, so as to avoid the situation where the gap between the heat sink plates 5 is too small, resulting in a reduction in the flow rate of the heat dissipation airflow in the gap.

[0033] Furthermore, a thermally conductive silicone sheet 4 is sandwiched between the thermally conductive sheet 1 and the PCB board 3;

[0034] Specifically, the operating heat of the PCB board 3 can be transferred to the thermal conductive sheet 1 through the thermal conductive silicone sheet 4, and the thermal conductive sheet 1 disperses the heat to each heat sink 5. The air cooling mechanism can quickly reduce the heat of the PCB board 3 to prevent the PCB board 3 from overheating, and the heat dissipation effect is good. It is worth mentioning that the flexible thermal conductive silicone sheet 4 overcomes the shortcomings of poor thermal conduction between the PCB board 3 and the thermal conductive sheet 1, can fill the contact gap, and can obtain efficient heat conduction effect without adhesive fixation.

[0035] Furthermore, a plurality of limiting posts 12 are provided on one side of the heat conducting sheet 1 away from the heat dissipation plate 5, and corresponding slots are provided on the heat conducting silicone sheet 4 corresponding to the limiting posts 12;

[0036] Specifically, before installation, the thermally conductive silicone sheet 4 is attached to one side of the thermally conductive sheet 1, and the limiting column 12 is embedded in the slot to prevent the thermally conductive silicone sheet 4 from shifting;

[0037] Optionally, a plurality of limiting posts 12 are respectively located at each corner of the thermal conductive sheet 1 , and the limiting posts 12 are interference fit with the slots, so that when the thermal conductive silicone sheet 4 and the thermal conductive sheet 1 are attached, the thermal conductive silicone sheet 4 will not fall off.

[0038] Furthermore, the outer sides of the heat conducting sheet 1 and the PCB board 3 are jointly sleeved with a connecting strip 2, and a limiting groove 11 is provided on a side of the heat conducting sheet 1 away from the PCB board 3, and the width of the limiting groove 11 is consistent with the width of the connecting strip 2;

[0039] Specifically, the limiting groove 11 is located in the gap between two heat sinks 5 . When the connecting strip 2 is bound, the connecting strip 2 is fully matched with the limiting groove 11 , which can prevent the heat conducting sheet 1 from sliding left and right, thus facilitating the assembly process.

[0040] Furthermore, a fastening assembly 6 is connected between the two ends of the connecting strip 2, and the fastening assembly 6 includes a connecting box 61 fixed to one end of the connecting strip 2, and supporting rotating cylinders 62 are fixedly embedded on the inner walls of both sides of the connecting box 61, and a through rod 63 is rotatably connected between the two supporting rotating cylinders 62, and a through groove 64 is provided in the middle of the through rod 63;

[0041] Specifically, the length of the through slot 64 is consistent with the width of the connecting strip 2, and plays a role of limiting and guiding.

[0042] Furthermore, the other end of the connecting strip 2 passes through the connecting box 61 and the through slot 64 to be fixedly connected to the limit stopper 21, and the connecting box 61 is provided with a notch 65 to allow the connecting strip 2 to pass through;

[0043] Specifically, the setting of the limiting stop column 21 enables the through rod 63 to wrap around the connecting strip 2 when rotating.

[0044] Furthermore, a driving box 66 is fixed to one side of the connecting box 61, one end of the through-rod 63 extends into the driving box 66 and is fixedly connected to a driven worm gear 67, the other end of the driving box 66 is rotatably connected to a driving worm 68, the driving worm 68 is transmission-connected to the driven worm gear 67, and one end of the rotating shaft of the driving worm 68 passes through the driving box 66 and is fixedly connected to a knob 69, and a S-shaped groove is provided on the end surface of the knob 69;

[0045] Specifically, using a flat-blade screwdriver to turn the knob 69 forward can drive the driving worm 68 to rotate, the driving worm 68 drives the driven worm wheel 67 to rotate, and the driven worm wheel 67 drives the through-rod 63 to rotate. During this process, the connecting strip 2 is continuously wrapped around the outside of the through-rod 63. Since the driving worm 68 and the driven worm wheel 67 have a one-way self-locking effect, the connecting strip 2 can be fully tightened so that the heat conducting sheet 1 presses the heat conducting silicone sheet 4. Conversely, using a flat-blade screwdriver to turn the knob 69 backward can drive the driving worm 68 to rotate, the driving worm 68 drives the driven worm wheel 67 to rotate, and the driven worm wheel 67 drives the through-rod 63 to rotate. During this process, the through-rod 63 continuously unwinds the connecting strip 2, and the connecting strip 2 can be adjusted to be loose.

[0046] Working principle: when the assembleable metal heat sink is in use, the heat conductive sheet 1, the heat conductive silicone sheet 4 and the PCB board 3 are stacked, and the connecting strip 2 is sleeved on the outside of the three, wherein the limit column 12 is embedded in the limit groove 11, and the connecting strip 2 is embedded in the limit groove 11, which can prevent the heat conductive sheet 1, the heat conductive silicone sheet 4 and the connecting strip 2 from being misplaced. The knob 69 is screwed with a flat-blade screwdriver to drive the driving worm 68 to rotate, and the driving worm 68 drives the driven worm gear 67 to rotate, and the driven worm gear 67 drives the through rod 63 to rotate. In this process, the connecting strip 2 is continuously wrapped around the outside of the through rod 63, and the connecting strip 2 can be fully tightened, so that the heat conductive sheet 1 presses the heat conductive silicone sheet 4, and the operating heat of the PCB board 3 can be transferred to the heat conductive sheet 1 through the heat conductive silicone sheet 4, and the heat conductive sheet 1 disperses the heat to each heat sink 5, and the air cooling mechanism can quickly reduce the heat of the PCB board 3 to prevent the PCB board 3 from overheating, and the heat dissipation effect is good.

Claims

1. An assembleable metal heat sink, comprising a heat conducting sheet (1) and a connecting strip (2), characterized in that: The heat conducting sheet (1) is located on one side of the PCB board (3); a heat conducting silicone sheet (4) is clamped between the heat conducting sheet (1) and the PCB board (3); a plurality of heat dissipation plates (5) are fixed to the side of the heat conducting sheet (1) away from the PCB board (3); a connecting strip (2) is sleeved on the outer sides of the heat conducting sheet (1) and the PCB board (3); and a fastening assembly (6) is connected between the two ends of the connecting strip (2); The fastening assembly (6) comprises a connection box (61) fixed to one end of the connection strip (2), support cylinders (62) are fixedly embedded on the inner walls of both sides of the connection box (61), a through rod (63) is rotatably connected between the two support cylinders (62), and a through groove (64) is provided in the middle of the through rod (63).

2. The assembleable metal heat sink according to claim 1, characterized in that: The other end of the connecting strip (2) passes through the connecting box (61) and the through slot (64) to be fixedly connected to the limit stop column (21), and the connecting box (61) is provided with a notch (65) to allow the connecting strip (2) to pass through.

3. The assembleable metal heat sink according to claim 2, characterized in that: A driving box (66) is fixed to one side of the connecting box (61); one end of the through-rod (63) extends into the driving box (66) and is fixedly connected to a driven worm gear (67); the other end of the driving box (66) is rotatably connected to a driving worm (68); the driving worm (68) is transmission-connected to the driven worm gear (67); one end of the rotating shaft of the driving worm (68) passes through the driving box (66) and is fixedly connected to a knob (69); a slot is provided on the end surface of the knob (69).

4. The assembleable metal heat sink according to claim 1, characterized in that: A limiting groove (11) is provided on a side of the heat conducting sheet (1) away from the PCB board (3), and the width of the limiting groove (11) is consistent with the width of the connecting strip (2).

5. The assembleable metal heat sink according to claim 1, characterized in that: The plurality of heat dissipation plates (5) are arranged parallel to each other, and the spacing between adjacent heat dissipation plates (5) is consistent.

6. The assembleable metal heat sink according to claim 1, characterized in that: A plurality of limiting posts (12) are arranged on the side of the heat conducting sheet (1) away from the heat dissipation plate (5), and corresponding slots are arranged on the heat conducting silicone sheet (4) corresponding to the limiting posts (12).

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