Chip-on-board heat sink locking fixture

Abstract

The utility model discloses a locking fixture of chip radiator on circuit board, be equipped with first positioning member and second positioning member on jig body, first positioning member is used for supporting radiator and is equipped with one side of jig body, second positioning member sets up circuit board at the other side of jig body, and is equipped with buffer piece on second positioning member. The utility model discloses through setting first positioning member and second positioning member, can place radiator and circuit board respectively and make circuit board chip towards radiator place, avoid the problem that the displacement of chip position appears in the locking process of radiator, ensure the heat conduction efficiency of radiator, through setting buffer piece, can limit the stroke of circuit board in the locking process and slow down its advancing speed, avoid the extrusion or collision of chip and radiator, thereby reach the purpose of protecting chip, in the application, through selecting suitable buffer piece and cooperating with limit ring, can avoid the damage of chip caused by artificial control failure.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing fixtures, and in particular to a locking fixture for chip heat sinks on circuit boards. Background Technology

[0002] In circuit board manufacturing, heat sinks are often installed on chips to enhance heat dissipation. Currently, the most commonly used chip heat sinks are finned heat dissipation structures formed by extruding aluminum ingots. During assembly, the base of the heat sink is pressed against the chip to conduct heat. Therefore, during operation, it is necessary to carefully control the locking force between the base and the circuit board. This is to avoid damaging the chip with the base while ensuring that the base maintains a large contact area with the chip to ensure efficient heat conduction. Experienced personnel are required to perform the locking operation. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a locking fixture for a chip heat sink on a circuit board. By setting a first positioning member and a second positioning member, the heat sink and the circuit board can be placed respectively, and the chip on the circuit board is placed facing the heat sink, avoiding the problem of misalignment between the heat sink and the chip during the locking process and ensuring the heat conduction efficiency of the heat sink. By setting a buffer member, the travel of the circuit board during the locking process can be limited and its travel speed can be slowed down, preventing the chip from being squeezed or collided with the heat sink, thereby achieving the purpose of protecting the chip. In application, by selecting a suitable buffer member and cooperating with a limit ring, chip damage caused by human error can be avoided.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A locking fixture for a chip heat sink on a circuit board includes a fixture body. The fixture body has a first positioning member and several second positioning members. The first positioning member supports the heat sink, and the several second positioning members are matched one-to-one with positioning holes and slots on a circuit board to support the circuit board.

[0006] The first positioning member is mounted on the fixture body and located on one side thereon. A cavity is formed on the first positioning member that can accommodate the heat sink. A clearance groove is formed on the fixture body to avoid the cavity.

[0007] Each of the second positioning elements penetrates vertically through the fixture body and can slide along it. One end of each element is a positioning end and extends to the side of the fixture body away from the first positioning element and is used to support the circuit board. Each of the second positioning elements or the fixture body is provided with a buffer between each positioning end and the fixture body.

[0008] As a further explanation of the above technical solution:

[0009] In the above technical solution, the first positioning member is a hat-shaped structure and is covered on one side of the clearance groove, and its brim is detachably fixed to the fixture body.

[0010] In the above technical solution, each of the positioning ends is an umbrella-shaped structure, with its umbrella part extending in a direction away from the fixture body, and its outer wall used to support the circuit board, and its handle part penetrating the fixture body and being able to slide along it.

[0011] In the above technical solution, an elastic washer is also fitted on the outer wall of each umbrella part.

[0012] In the above technical solution, each of the handles is fitted with a buffer between the fixture body and the umbrella part.

[0013] In the above technical solution, a buffer is provided on the fixture body at the projection point of each umbrella part thereon.

[0014] In the above technical solution, the buffer is a spring or vibration damping cotton.

[0015] In the above technical solution, a limiting ring is also provided on the side of the first positioning member on the fixture body. Each limiting ring is sleeved on the periphery of the second positioning member and can be slidably connected to it. The inner wall of each limiting ring and the second positioning member are provided with matching limiting structures.

[0016] In the above technical solution, the fixture body also has one or more clearance slots for avoiding components on the circuit board and several positioning slots for fixing the fixture body.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the first positioning member and the second positioning member, the heat sink and the circuit board can be placed respectively, and the chip on the circuit board is placed facing the heat sink, avoiding the problem of chip position displacement during the heat sink locking process, and ensuring the heat conduction efficiency of the heat sink; by setting the buffer member, the travel of the circuit board during the locking process can be limited and its travel speed can be slowed down, avoiding the chip from being squeezed or collided with the heat sink, thereby achieving the purpose of protecting the chip. In application, by selecting a suitable buffer member and cooperating with the limit ring, chip damage caused by human operation error can be avoided. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of an embodiment of the present invention;

[0019] Figure 2 This is a front view of the structure of the circuit board and heat sink after locking together according to an embodiment of the present invention;

[0020] Figure 3This is a top view of the structure of the circuit board and heat sink after locking together according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the first positioning member in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the second positioning member in one embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the second positioning member in another embodiment of the present invention;

[0024] In the figure: 10, jig body; 20, first positioning component; 30, second positioning component; 31, positioning end; 40, elastic washer; 50, circuit board; 60, limit ring; 70, buffer component; 80, heat sink; 90, chip; 1, cavity; 2, clearance groove; 3, cap edge; 4, handle; 5, umbrella part; 7, clearance hole groove; 8, positioning hole groove. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1-3 As shown, the locking fixture for the chip heat sink on the circuit board includes a fixture body 10. The fixture body 10 is provided with a first positioning member 20 and a plurality of second positioning members 30. The first positioning member 10 is used to support the heat sink 80, and the plurality of second positioning members 30 are matched one-to-one with positioning holes and slots on a circuit board 50 and are used to support the circuit board 50.

[0028] The first positioning member 20 is mounted on the fixture body 10 and located on one side thereof. A cavity 1 is formed on the first positioning member 20 that can accommodate the heat sink 80. A clearance groove 2 is formed on the fixture body 10 to avoid the cavity 1.

[0029] Each second positioning element 30 penetrates vertically through the fixture body 10 and can slide along it. One end of each element is a positioning end 31 and extends to the side of the fixture body 10 away from the first positioning element 20 and is used to support the circuit board 50. Each second positioning element 30 or the fixture body 10 is provided with a buffer element 70 between each positioning end 31 and the fixture body 10.

[0030] In use, first place the heat sink in the cavity 1 with its positioning base plate facing the circuit board 50, then place the chip 90 on the circuit board 50 to which the heat sink 80 is to be installed facing the fixture body 10, and mount the circuit board 50 on several second positioning members 30; after completion, screws can be passed through the positioning hole slots next to the chip 90 on the circuit board 50 to lock the circuit board onto the positioning hole on the base plate of the heat sink 80. During the locking process, the buffer member 70 can limit the travel of the circuit board 50 and slow down its travel speed to prevent the chip 90 from being squeezed or collided with the heat sink 80.

[0031] like Figure 4 As shown, the first positioning member 20 has a cap-shaped structure and covers one side of the clearance groove 2. Its cap edge 3 is detachably fixed to the fixture body. In application, an appropriate "cap" structure can be selected according to the structure of the radiator 80 so that the first positioning member 20 can effectively support the radiator 80 during the screw tightening process without affecting its heat dissipation structure and appearance.

[0032] like Figure 5-6 As shown, each positioning end 31 is an umbrella-shaped structure, with its umbrella portion 5 extending in a direction away from the fixture body 10, and its outer wall used to support the circuit board 50. Its handle portion 4 penetrates the fixture body 10 and can slide along it. To further reduce the wear between the positioning holes and slots on the circuit board 50 and the umbrella portion 5, an elastic washer 40 is also fitted on the outer wall of each umbrella portion 5.

[0033] like Figure 5 As shown, in one embodiment of this utility model, the electronic components on the circuit board 50 are relatively high. In order to avoid damaging the components, the distance between the circuit board 50 and the fixture body 10 is relatively large. Therefore, a spring is fitted between the fixture body 10 and the umbrella part 5 on each handle 4 as a buffer 70.

[0034] like Figure 6As shown, in another embodiment of this utility model, the electronic components on the circuit board 50 are relatively low. In order to improve the efficiency of circuit board installation and further reduce costs, a damping cotton is laid on the end face of the fixture body 10 facing the circuit board 50 as a buffer 70. The damping cotton is provided with through holes that are adapted to the handle 4.

[0035] Preferably, to further limit the locking stroke of the circuit board 50 during the locking process and protect the chip 90, a limiting ring 60 is also provided on the jig body 10 beside the first positioning member 20. Each limiting ring 60 is sleeved around the second positioning member 30 and can be slidably connected to it. The inner wall of each limiting ring 60 and the handle 4 on the second positioning member 30 are provided with matching limiting structures. In this embodiment, the limiting structure is a protrusion provided on the inner wall of the end of the limiting ring 60 and the outer wall of the handle 4.

[0036] like Figure 1 As shown, the fixture body 10 also has one or more clearance slots 7 for avoiding components on the circuit board 50 and several positioning slots 8 for fixing the fixture body 10.

[0037] This invention, by setting a first positioning member 20 and a second positioning member 30, can respectively place the heat sink 80 and the circuit board 50, and place the chip 90 on the circuit board 50 facing the heat sink 80, avoiding the problem of chip position misalignment during the heat sink locking process and ensuring the heat conduction efficiency of the heat sink; by setting a buffer member 70, the travel of the circuit board 50 during the locking process can be limited and its travel speed can be slowed down, avoiding the chip 90 from being squeezed or collided with the heat sink 80, thereby achieving the purpose of protecting the chip 90. In application, by selecting a suitable buffer member 70 and cooperating with the limiting ring 60, chip damage caused by human operation error can be avoided.

[0038] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A locking fixture for a chip heat sink on a circuit board, comprising a fixture body; characterized in that, The fixture body is provided with a first positioning member and a plurality of second positioning members. The first positioning member is used to support the heat sink, and the plurality of second positioning members are matched one-to-one with positioning holes and slots on a circuit board and are used to support the circuit board, wherein: The first positioning member is mounted on the fixture body and located on one side thereon. A cavity is formed on the first positioning member that can accommodate the heat sink. A clearance groove is formed on the fixture body to avoid the cavity. Each of the second positioning elements penetrates vertically through the fixture body and can slide along it. One end of each element is a positioning end and extends to the side of the fixture body away from the first positioning element and is used to support the circuit board. Each of the second positioning elements or the fixture body is provided with a buffer between each positioning end and the fixture body.

2. The locking fixture for the chip heat sink on the circuit board according to claim 1, characterized in that, The first positioning element is a cap-shaped structure and is placed around one side of the clearance groove, with its cap edge detachably fixed to the fixture body.

3. The locking fixture for the chip heat sink on the circuit board according to claim 1, characterized in that, Each of the positioning ends is an umbrella-shaped structure, with its umbrella portion extending in a direction away from the fixture body, and its outer wall used to support the circuit board, and its handle penetrating the fixture body and sliding along it.

4. The locking fixture for the chip heat sink on the circuit board according to claim 3, characterized in that, An elastic washer is also fitted on the outer wall of each umbrella section.

5. The locking fixture for the chip heat sink on the circuit board according to claim 3, characterized in that, Each of the handles is fitted with a buffer between the fixture body and the umbrella part.

6. The locking fixture for the chip heat sink on the circuit board according to claim 3, characterized in that, The fixture body has a buffer element at the projection point of each of the umbrella parts.

7. The locking fixture for the chip heat sink on the circuit board according to claim 5 or 6, characterized in that, The buffer component is a spring or vibration damping cotton.

8. The locking fixture for a chip heat sink on a circuit board according to any one of claims 1-6, characterized in that, The fixture body is provided with a limiting ring on the side of the first positioning member. Each limiting ring is sleeved on the periphery of the second positioning member and can be slidably connected to it. The inner wall of each limiting ring is provided with a matching limiting structure on the second positioning member.

9. The locking fixture for a chip heat sink on a circuit board according to any one of claims 1-6, characterized in that, The fixture body also has one or more clearance slots for avoiding components on the circuit board and several positioning slots for fixing the fixture body.

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