A heat dissipating device for a circuit board

Abstract

This utility model belongs to the field of heat dissipation technology for electronic devices, specifically referring to a heat dissipation device for circuit boards. It includes a circuit board body, and further includes: a lower housing with a mounting platform for fixing the circuit board body inside; an adjustable heat dissipation module, including a mounting plate detachably mounted to the bottom of the lower housing, multiple cooling fans mounted on the mounting plate, and a repositioning component for adjusting the position of each cooling fan; a plug-in trigger module, including an upper housing covering the lower housing, plug-in ribs evenly distributed along the circumference of the upper housing, plug-in slots located circumferentially on the lower housing and corresponding to the plug-in ribs, and a trigger switch located at the bottom of the plug-in slot, the trigger switch controlling the start and stop of the cooling fans; and a magnetic suction component located at the junction of the plug-in ribs and the plug-in slots; wherein, when the plug-in ribs are fully inserted into the plug-in slots and abut against the trigger switch, the cooling fans start. This utility model, by incorporating a plug-in trigger module and a magnetic suction component in the heat dissipation device, achieves circuit board fixation and heat dissipation self-start with a single plug-in action, simplifying the process.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation technology for electronic devices, and specifically refers to a heat dissipation device for circuit boards. Background Technology

[0002] Circuit boards, as a core component of electronic devices, are widely used in computers, communications, aerospace, and other fields, undertaking the important functions of electrical connection and signal transmission for electronic components. With the rapid development of electronic technology, the integration level of circuit boards is constantly increasing, and the heat generated by electronic components during operation is increasing dramatically. If heat dissipation is not timely and effective, it will lead to a decline in circuit board performance, a shortened lifespan of components, and even equipment failure. Therefore, efficient heat dissipation devices are crucial to ensuring the stable operation of circuit boards.

[0003] Currently, most common circuit board heat dissipation devices on the market adopt traditional heat dissipation designs, which have problems such as cumbersome operation and safety hazards. For example, some heat dissipation devices require manual activation of the cooling fan switch. After assembling the circuit board, users need to perform additional fan power supply and startup operations, increasing the complexity of the usage process. Some heat dissipation devices have automatic start-up functions, but they rely on independent power supply systems and cannot form an effective linkage with the circuit board assembly process. As a result, the cooling fan may still start even if the device is not fully closed or the installation is unstable. This not only fails to achieve the expected heat dissipation effect, but may also cause safety accidents due to loose or unsecured circuit boards, affecting the overall reliability and stability of electronic equipment. Utility Model Content

[0004] This invention simplifies the process by incorporating a plug-in trigger module and a magnetic assembly within the heat dissipation device, enabling a single plug-in action to complete circuit board fixation and heat dissipation self-starting. This addresses the problems mentioned in the background section.

[0005] The purpose of this utility model is achieved as follows: a heat dissipation device for a circuit board, comprising a circuit board body, and further comprising:

[0006] The lower housing contains a platform for fixing the circuit board body.

[0007] The adjustable heat dissipation module includes a mounting plate that can be detached from the bottom of the lower housing, multiple cooling fans mounted on the mounting plate, and a repositioning component for adjusting the position of each cooling fan.

[0008] The plug-in trigger module includes an upper shell covering the lower shell, plug-in ribs evenly distributed along the circumference of the upper shell, plug-in slots located on the circumference of the lower shell and corresponding to the plug-in ribs, and a trigger switch located at the bottom of the plug-in slot, wherein the trigger switch controls the opening and closing of the cooling fan.

[0009] The magnetic attraction component is located at the junction of the insertion rib and the insertion slot;

[0010] When the connector rib is fully inserted into the connector slot and abuts against the trigger switch, the cooling fan starts.

[0011] The present invention is further configured such that the switching component includes slide rails spaced apart on the mounting plate, a slider disposed on the cooling fan and cooperating with the slide rails, a plurality of positioning holes evenly distributed along the moving direction of the cooling fan, and locking screws for locking the position of the slider through the positioning holes.

[0012] The present invention is further configured such that the trigger switch is a micro switch, and its trigger end is arranged facing the opening of the plug slot.

[0013] The present invention is further configured such that the magnetic attraction component includes a first magnetic attraction block disposed on the side wall of the insertion rib and a corresponding second magnetic attraction block disposed on the side wall of the insertion slot, wherein the magnetic poles of the first magnetic attraction block and the second magnetic attraction block are arranged alternately.

[0014] The present invention is further configured such that the mounting plate is provided with an air inlet corresponding to the air inlet area of ​​the cooling fan, and the side wall of the lower housing is provided with an exhaust port.

[0015] The present invention is further provided that the upper housing is provided with a heat dissipation grille.

[0016] The present invention is further configured such that the end of the plug-in rib is provided with a guide slope, and the entrance of the plug-in groove is provided with a flared structure that matches the guide slope.

[0017] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0018] 1. With the plug-in trigger module, when the plug rib is fully inserted into the plug slot and abuts the trigger switch, the cooling fan starts automatically, simplifying the traditional separate assembly, power supply and cooling process into a single plug-in action, eliminating the need to manually turn on the switch or perform additional power supply operations, thus improving ease of use.

[0019] 2. The fan is controlled by mechanical contact between the plug rib and the trigger switch to ensure that the cooling fan does not start when the device is not fully closed. This avoids safety hazards caused by fan operation when the circuit board is not fixed or the device is not installed stably, and ensures the stable operation of electronic equipment.

[0020] 3. By using the sliding rail and slider, positioning hole and locking screw in the transposition component, the position of the cooling fan can be flexibly adjusted, so that it can be laid out in a targeted manner according to the heat source distribution of different circuit boards, solving the problem of uneven heat dissipation and improving heat dissipation efficiency. Attached Figure Description

[0021] Figure 1 This is an exploded view of this utility model;

[0022] Figure 2 This is a utility model Figure 1 A magnified structural diagram of part A;

[0023] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0024] Figure 4 This is a utility model Figure 3 A magnified structural diagram of part B.

[0025] The attached figures are labeled as follows: 1. Circuit board body; 2. Lower housing; 3. Placement platform; 4. Adjustable heat dissipation module; 40. Mounting plate; 41. Cooling fan; 42. Repositioning component; 420. Slide rail; 421. Slider; 422. Positioning hole; 423. Locking screw; 5. Plug-in trigger module; 50. Upper housing; 51. Plug-in rib; 52. Plug-in slot; 53. Trigger switch; 6. Magnetic suction component; 60. First magnetic suction block; 61. Second magnetic suction block; 7. Air inlet; 8. Air outlet; 9. Heat dissipation grille; 10. Guide slope; 11. Flared structure. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 :

[0027] Example 1:

[0028] This embodiment provides a heat dissipation device for a circuit board, including a circuit board body 1, and further comprising:

[0029] The lower housing 2 has a placement platform 3 inside for fixing the circuit board body 1;

[0030] The adjustable heat dissipation module 4 includes a mounting plate 40 that can be detached from the bottom of the lower housing 2, a plurality of cooling fans 41 disposed on the mounting plate 40, and a switching component 42 for adjusting the position of each cooling fan 41.

[0031] The plug-in trigger module 5 includes an upper housing 50 covering the lower housing 2, plug-in ribs 51 evenly distributed around the circumference of the upper housing 50, plug-in slots 52 located around the circumference of the lower housing 2 and corresponding one-to-one with the plug-in ribs 51, and a trigger switch 53 located at the bottom of the plug-in slot 52, wherein the trigger switch 53 controls the opening and closing of the cooling fan 41.

[0032] The magnetic suction component 6 is located at the junction of the insertion rib 51 and the insertion slot 52;

[0033] When the plug rib 51 is fully inserted into the plug slot 52 and abuts against the trigger switch 53, the cooling fan 41 starts.

[0034] The lower housing 2 provides installation space and protection for the circuit board body 1, and also serves as a mounting base for other components. The lower housing 2 has a cavity structure to accommodate the circuit board body 1, with the bottom for mounting an adjustable heat dissipation module 4, and the side walls have insertion slots 52 that mate with the upper housing 50. The lower housing 2 is detachably connected to the mounting plate 40, and is circumferentially connected to the upper housing 50 via insertion ribs 51 and insertion slots 52.

[0035] The placement platform 3 is used to fix the circuit board body 1, ensuring its stable position within the device. The placement platform 3 is generally a platform structure protruding from the bottom of the inner cavity of the lower housing 2, and its shape is adapted to the circuit board body 1. The placement platform 3 is integrally formed with the lower housing 2 or fixed by welding, bolting, or other methods. The circuit board body 1 can be connected to the placement platform 3 with screws through pre-drilled holes.

[0036] The adjustable heat dissipation module 4 is mainly used to provide heat dissipation for electronic devices such as circuit boards. Through its adjustable structural design, it can be adapted to electronic devices of different specifications or installation scenarios, flexibly adjust the heat dissipation position and intensity, ensure that the electronic devices maintain a reasonable temperature during operation, avoid performance degradation and component damage caused by overheating, and improve the stability and service life of the equipment.

[0037] Mounting plate 40 serves as the mounting carrier for cooling fan 41 and is detachably mounted on the bottom of lower housing 2 for easy maintenance and adjustment. Mounting plate 40 is generally a flat structure and can be detachably connected to the bottom of lower housing 2 by bolts, clips, or other means.

[0038] The cooling fan 41 dissipates heat generated by the circuit board body 1 through forced convection. The cooling fan 41 is commonly an axial fan or a centrifugal fan, consisting of fan blades, a motor, etc. There are multiple cooling fans 41, which are connected to the mounting plate 40 and their positions can be adjusted via a switching assembly 42.

[0039] The transposition component 42 is used to adjust the position of the cooling fan 41 on the mounting plate 40 to adapt to the heat source distribution of different circuit boards.

[0040] The plug-in trigger module 5 automatically triggers the cooling fan 41 to start when the upper and lower housings 2 are closed through the plug-in structure, which simplifies the operation and ensures that the cooling fan only starts after the device is completely closed, thereby improving the safety and linkage of use.

[0041] The upper housing 50 covers the lower housing 2, protecting the internal circuit board body 1 and components, and also cooperates with the lower housing 2 to realize the plug-in triggering function. The upper housing 50 has a cover-shaped structure adapted to the shape of the lower housing 2, and has plug-in ribs 51 in the circumferential direction that correspond one-to-one with the plug-in slots 52. The upper housing 50 is connected to the plug-in slots 52 of the lower housing 2 through the circumferential plug-in ribs 51.

[0042] The insertion rib 51 engages with the insertion slot 52 of the lower housing 2 to connect the upper and lower housings 2, and activates the trigger switch 53 when fully inserted. The insertion rib 51 is generally a long, raised strip to facilitate insertion into the insertion slot 52. The insertion rib 51 is usually integrally formed with the upper housing 50.

[0043] The insertion slot 52 mates with the insertion rib 51 to connect the upper and lower housings 2 and accommodate the trigger switch 53. When the insertion rib 51 is a long, raised strip, the insertion slot 52 becomes a matching long, recessed groove, with the trigger switch 53 located at the bottom of the groove. The insertion slot 52 is typically integrally formed with the lower housing 2.

[0044] The trigger switch 53 is used to control the start and stop of the cooling fan 41. When the connector 51 is fully inserted into the connector slot 52 and presses against the trigger switch 53, the fan starts. The trigger switch 53 can be embedded in the bottom of the connector slot 52. By creating a groove in the bottom of the connector slot 52 that matches the trigger switch 53, the trigger switch 53 is placed in the groove with its trigger end extending out of the groove opening, so that the connector 51 can press against the trigger end when fully inserted. The trigger switch 53 is connected to the cooling fan 41 via a circuit.

[0045] The magnetic suction component 6 is used to assist in the connection between the upper and lower housings 2, enhance the stability after insertion, and prevent loosening.

[0046] In this embodiment, when a circuit board heat dissipation device needs to be installed, the circuit board body 1 is first fixed on the placement platform 3 inside the lower housing 2. Then, the mounting plate 40, which is equipped with the cooling fan 41 and the repositioning component 42, is installed at the bottom of the lower housing 2. Next, the insertion rib 51 of the upper housing 50 is aligned with the insertion slot 52 of the lower housing 2. During the insertion process, the magnetic attraction component 6 causes the joint area of ​​the insertion rib 51 and the insertion slot 52 to attract each other, assisting the connection between the upper and lower housings 2 and enhancing stability. When the insertion rib 51 is fully inserted into the insertion slot 52, it presses against the trigger switch 53 located at the bottom of the slot. The trigger switch 53 closes, the circuit is connected, and the cooling fan 41 starts to dissipate heat from the circuit board body 1. The repositioning component 42 can flexibly adjust the position of the cooling fan 41 according to the different heat source distributions of the circuit board to achieve the best heat dissipation effect.

[0047] Example 2:

[0048] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] The switching component 42 includes slide rails 420 spaced apart on the mounting plate 40, sliders 421 disposed on the cooling fan 41 and cooperating with the slide rails 420, a plurality of positioning holes 422 evenly distributed along the moving direction of the cooling fan 41, and locking screws 423 that lock the position of sliders 421 through the positioning holes 422.

[0050] The slide rail 420 provides a moving path for the cooling fan 41 and constrains its direction of movement. The slide rail 420 is generally a long, narrow groove structure, typically dovetail or T-shaped, and is fixed at intervals on the mounting plate 40, parallel to the direction of movement of the cooling fan 41. If three cooling fans 41 are configured, then three slide rails 420 are correspondingly configured, allowing each cooling fan 41 to move independently. The slide rail 420 is usually integrally formed with the mounting plate 40.

[0051] The slider 421 cooperates with the slide rail 420 to support the cooling fan 41 and enable sliding. Its shape matches the slide rail 420. When the slide rail 420 is T-shaped, the slider 421 is a matching T-shaped structure, allowing it to slide smoothly along the slide rail 420. The slider 421 can be connected to the bottom of the cooling fan 41 by bolts or clips.

[0052] The positioning hole 422 is used to provide a locking point for the slider 421, enabling precise positioning of the cooling fan 41. The positioning hole 422 is a circular through hole evenly distributed along the extension direction of the slide rail 420, penetrating the mounting plate 40. When the cooling fan 41 moves to the predetermined position, the reserved hole on the cooling fan 41 is aligned with the positioning hole 422 on the mounting plate 40, and the locking screw 423 is tightened after passing through the reserved hole and aligning with the positioning hole 422, thereby fixing the position of the slider 421.

[0053] Example 3:

[0054] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] The trigger switch 53 is a micro switch, and its trigger end is positioned facing the opening of the insertion slot 52.

[0056] In this embodiment, a micro switch is selected as the trigger switch 53, and its trigger end is oriented towards the opening of the insertion slot 52. The purpose is to utilize the sensitive triggering characteristics of the micro switch to ensure that the insertion rib 51 of the upper housing 50 can reliably press the trigger end at the first moment when it is fully inserted into the insertion slot 52, thereby achieving circuit conduction and starting the cooling fan 41. The trigger end of the micro switch has the characteristics of short stroke and high sensitivity. Its mechanical structure can accurately respond to the pressing action of the insertion rib 51, ensuring reliable triggering at the moment the insertion rib 51 is fully inserted into the insertion slot 52, avoiding false or delayed start-up problems caused by poor contact or stroke error. At the same time, the layout facing the opening precisely matches the insertion action, making the insertion and triggering closely linked, avoiding problems such as trigger delay or missed triggering caused by incorrect trigger end orientation or insufficient switch sensitivity, thereby ensuring the stable realization of the "cooling upon closing" function of the heat dissipation device.

[0057] Example 4:

[0058] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] The magnetic attraction assembly 6 includes a first magnetic attraction block 60 disposed on the side wall of the insertion rib 51 and a corresponding second magnetic attraction block 61 disposed on the side wall of the insertion slot 52, wherein the magnetic poles of the first magnetic attraction block 60 and the second magnetic attraction block 61 are arranged alternately.

[0060] The first magnetic block 60 and the second magnetic block 61 cooperate to generate an attractive force, assisting in insertion and locking the position. The first magnetic block 60 is typically a rectangular or circular permanent magnet, which can be embedded into the side wall at the bottom of the insertion rib 51 by adhesive or injection molding, thereby ensuring full contact with the second magnetic block 61 without affecting the insertion fit. The second magnetic block 61 can also be embedded into the side wall at the bottom of the insertion slot 52 by adhesive or injection molding, matching the shape and position of the first magnetic block 60. The installation positions of the first magnetic block 60 and the second magnetic block 61 are far away from the thermal electronic components on the circuit board body 1, and the surface of the magnetic blocks can be covered with a magnetic shielding layer to suppress the interference of the magnetic field on the signal transmission of the circuit board and ensure the stability of the electronic equipment operation.

[0061] In this embodiment, the first magnetic block 60 and the second magnetic block 61 are arranged in an alternating magnetic arrangement. The purpose is to form a closed magnetic field loop between them by using the principle of opposite poles attracting each other. The gradient magnetic field enhances the adsorption force and increases the shear resistance to resist lateral displacement. This allows the insertion rib 51 and the insertion slot 52 to be tightly locked by magnetic force after insertion, preventing the insertion rib 51 from retracting and disengaging from the trigger switch 53 due to vibration or external force. At the same time, the magnetic force guides the insertion and alignment, shortens the assembly time, and improves the reliability of the contact and the stability of heat dissipation of the trigger switch 53, ensuring the stable realization of the "insertion triggers" function.

[0062] Example 5:

[0063] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0064] The mounting plate 40 is provided with an air inlet 7 corresponding to the air intake area of ​​the cooling fan 41, and the side wall of the lower housing 2 is provided with an exhaust port 8.

[0065] In this embodiment, the mounting plate 40 is provided with an air inlet 7 corresponding to the air intake area of ​​the cooling fan 41, and an exhaust vent 8 is opened on the side wall of the lower housing 2. The purpose is to construct a complete and efficient air convection channel. The air inlet 7 ensures that cold air can enter the air intake area of ​​the cooling fan 41 accurately and smoothly, avoiding airflow loss due to airflow obstruction. The exhaust vent 8 on the side wall of the lower housing 2 provides an exhaust path for hot air, forming an airflow path through the circuit board body 1 area with the air inlet 7. This allows the airflow generated by the cooling fan 41 to quickly remove the heat generated by the circuit board body 1, accelerate air circulation, significantly improve heat dissipation efficiency, ensure that the circuit board body 1 is always within a reasonable operating temperature range, extend its service life, and stabilize its operating performance.

[0066] Example 6:

[0067] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] The upper housing 50 is provided with a heat dissipation grille 9.

[0069] In this embodiment, the upper housing 50 is provided with heat dissipation grilles 9, the purpose of which is to optimize heat dissipation and protect the internal structure.

[0070] The heat dissipation grille 9 typically employs a parallel strip or mesh-like perforated structure. The width of the gaps in the strip grille or the holes in the mesh ensures sufficient ventilation area, allowing the heat generated by the circuit board body 1 to be effectively dissipated through air convection, while also preventing larger external particles from entering the device and damaging the circuit board body 1 or the heat dissipation components. In terms of connection, the heat dissipation grille 9 is usually integrally injection molded with the upper housing 50 to ensure structural stability and prevent loosening from affecting heat dissipation performance. Alternatively, it can be detached and installed using clips, screws, or other methods, facilitating later cleaning and maintenance, thereby continuously ensuring heat dissipation efficiency and creating a good heat dissipation environment for the stable operation of the circuit board body 1.

[0071] Example 7:

[0072] This embodiment provides a heat dissipation device for a circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] The end of the insertion rib 51 is provided with a guide slope 10, and the entrance of the insertion groove 52 is provided with a flared structure 11 that matches the guide slope 10.

[0074] In this embodiment, a guide slope 10 is provided at the end of the insertion rib 51, and a matching flared structure 11 is provided at the entrance of the insertion groove 52, the purpose of which is to optimize the insertion process of the upper and lower shells 2.

[0075] The guide slope 10 can be inclined into a wedge shape, while the flared structure 11 is a trumpet shape with a gradually narrowing opening. The two shapes are compatible with each other and can play a guiding role during insertion, reducing the difficulty of insertion and reducing repeated adjustments caused by alignment deviations, so that the upper and lower shells 2 can be quickly and accurately connected. At the same time, this design can effectively avoid collision and wear between the insertion rib 51 and the edge of the insertion groove 52 during the insertion process, extend the service life of the components, ensure that the insertion action is completed smoothly, and thus ensure that the trigger switch 53 reliably triggers the cooling fan 41 to start, improving the convenience and stability of device assembly.

[0076] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A heat dissipation device for a circuit board, comprising a circuit board body (1), characterized in that... It also includes: The lower housing (2) has a placement platform (3) for fixing the circuit board body (1). The adjustable heat dissipation module (4) includes a mounting plate (40) that can be detached from the bottom of the lower housing (2), a plurality of heat dissipation fans (41) provided on the mounting plate (40), and a shifting component (42) for adjusting the position of each heat dissipation fan (41). The plug-in trigger module (5) includes an upper shell (50) covering the lower shell (2), plug-in ribs (51) evenly distributed along the circumference of the upper shell (50), plug-in slots (52) located in the circumference of the lower shell (2) and corresponding to the plug-in ribs (51), and a trigger switch (53) located at the bottom of the plug-in slot (52). The trigger switch (53) controls the opening and closing of the cooling fan (41). The magnetic suction assembly (6) is located at the junction of the insertion rib (51) and the insertion slot (52); When the plug rib (51) is fully inserted into the plug slot (52) and abuts against the trigger switch (53), the cooling fan (41) starts.

2. The heat dissipation device for a circuit board according to claim 1, characterized in that, The switching component (42) includes slide rails (420) spaced apart on the mounting plate (40), a slider (421) provided on the cooling fan (41) and cooperating with the slide rails (420), a plurality of positioning holes (422) evenly distributed along the moving direction of the cooling fan (41), and locking screws (423) that lock the position of the slider (421) through the positioning holes (422).

3. The heat dissipation device for a circuit board according to claim 1, characterized in that, The trigger switch (53) is a micro switch, and its trigger end is set towards the opening of the plug slot (52).

4. The heat dissipation device for a circuit board according to claim 1, characterized in that, The magnetic attraction assembly (6) includes a first magnetic attraction block (60) disposed on the side wall of the insertion rib (51) and a corresponding second magnetic attraction block (61) disposed on the side wall of the insertion slot (52), wherein the magnetic poles of the first magnetic attraction block (60) and the second magnetic attraction block (61) are arranged alternately.

5. A heat dissipation device for a circuit board according to claim 1, characterized in that, The mounting plate (40) is provided with an air inlet (7) corresponding to the air inlet area of ​​the cooling fan (41), and the side wall of the lower housing (2) is provided with an exhaust port (8).

6. A heat dissipation device for a circuit board according to claim 1, characterized in that, The upper housing (50) is provided with a heat dissipation grille (9).

7. A heat dissipation device for a circuit board according to claim 1, characterized in that, The end of the plug rib (51) is provided with a guide slope (10), and the entrance of the plug groove (52) is provided with a flared structure (11) that matches the guide slope (10).

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