Miniaturized low-noise switching power supply module

Abstract

The utility model relates to the technical field of switching power supplies, in particular to a miniaturized low-noise switching power supply module, which comprises a switching power supply shell, the front side of the switching power supply shell is detachably connected with a front cover plate through four long bolts, U-shaped positioning blocks are arranged at the bottoms of the left side and the right side of the inner wall of the switching power supply shell, and a bottom plate is inserted between the two U-shaped positioning blocks. A wiring terminal is arranged at the bottom of the bottom plate, a circuit board is arranged at the top of the bottom plate, and a first heat conducting plate penetrates through the rear side of the switching power supply shell. According to the miniaturized low-noise switching power supply module, after the front cover plate is detached, the bottom plate is directly pulled forwards to separate the bottom plate from the two U-shaped positioning blocks, so that the wiring terminal and the circuit board can be taken out, and compared with a traditional switching power supply module, more connecting structures are not needed, so that the size is reduced, and compared with a fan for heat dissipation adopted by the traditional switching power supply module, the size is reduced; according to the technical scheme, the effects of noise reduction and heat dissipation can be achieved, and noise is prevented from being generated when the switching power supply module works.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, in particular to a miniaturized low-noise switching power supply module. Background Art

[0002] High-frequency switching power supply, also known as switching rectifier SMR, is a power supply that works at high frequency through MOSFET or IGBT. The switching frequency is generally controlled within the range of 50-100kHz to achieve high efficiency and miniaturization. It is small in size and light in weight. The whole machine is made using a full range of anti-corrosion processes, which enhances the product's anti-corrosion ability and extends its service life. However, due to the small size of the high-frequency switching power supply equipment, the internal space is small, which is inconvenient for daily maintenance, causing inconvenience to the staff and reducing work efficiency.

[0003] The patent with publication number CN215601191U discloses a small high-frequency switching power supply device, including a switching power supply body, a protective shell welded on the top of the switching power supply body, a servo motor riveted on the inner top of the protective shell, a driving gear welded on the output end of the servo motor, and driven gears are provided on the left and right sides of the driving gear. The middle of the two groups of driven gears are respectively fixed with a first rotating shaft and a second rotating shaft, and the upper ends of the outer walls of the first rotating shaft and the second rotating shaft are fixedly sleeved with a first bevel gear, and the other end of the second bevel gear is fixedly connected with a screw, and a first slide seat is threadedly sleeved on the outer wall of the screw, and the first slide seat is fixedly installed on the upper rear side wall of the installation frame, and the first fixed seat is fixedly installed on the bottom end of the side wall of the switching power supply body, and the second fixed seat is welded on the other end of the telescopic rod, and the second fixed seat is fixedly installed on the front lower side wall of the installation frame. The utility model is convenient for maintenance and improves work efficiency.

[0004] In the specific use of the above-mentioned prior art, the cover plate needs to be removed first, and then the servo motor drives the driving gear to rotate, so that the chain rotates and drives the two sets of driven gears. Under the drive of the driven gear, the first rotating shaft and the second rotating shaft rotate, so that the first bevel gears on the left and right sides rotate, and the second bevel gear meshing therewith rotates, driving the screw to rotate, so that the first slide seat moves outward along the screw rod, and at the same time the second slide seat moves outward along the main pipe, so that the second fixed seat drives the auxiliary pipe and the sleeve rod to stretch, and then the installation frame moves to the outside of the switching power supply body under the drive of the first slide seat and the second slide seat. The above-mentioned installation structure is too complicated, and a large number of linkage structures are installed in the shell of the switching power supply body, which not only increases the volume of the switching power supply body, but also increases the failure rate. Once the linkage structure is stuck, the installation frame cannot be removed, and a fan needs to be set in the switching power supply for heat dissipation, which will generate noise during operation, which is not good for the surrounding environment. In view of this, we propose a miniaturized low-noise switching power supply module. Utility Model Content

[0005] The purpose of the utility model is to provide a miniaturized low-noise switching power supply module to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A miniaturized low-noise switching power supply module comprises a switching power supply housing with an open structure on the front side and the bottom, the front side of the switching power supply housing is detachably connected to a front cover plate by four long bolts, the bottoms of the left and right sides of the inner wall of the switching power supply housing are provided with U-shaped positioning blocks, a bottom plate is inserted between the two U-shaped positioning blocks, the rear side of the front cover plate is fitted with the front side of the bottom plate, the bottom of the bottom plate is provided with a wiring terminal, the top of the bottom plate is provided with a plurality of wire holes for the wiring terminal wires to pass through, a circuit board of the switching power supply module is provided at the top of the bottom plate and near the rear side, after the front cover plate is removed, the bottom plate is directly pulled forward to separate the bottom plate from the two U-shaped positioning blocks to take out the wiring terminals and the circuit board, the components of the switching power supply are installed on the circuit board, compared with the traditional switching power supply module, more connection structures are not required, thereby reducing the volume and facilitating the maintenance or repair of the small switching power supply module by the staff;

[0008] A first heat conducting plate is provided through the rear side of the switching power supply housing, and a plurality of first external heat conducting fins arranged equidistantly from left to right are provided on the rear side of the first heat conducting plate, so as to increase the contact surface between the rear side of the first heat conducting plate and the outside air, which is beneficial to heat dissipation; a second heat conducting plate is provided through the left and right sides of the switching power supply housing, and a plurality of second external heat conducting fins arranged equidistantly from front to back are provided on the opposite sides of the two second heat conducting plates, so as to increase the contact surface between the outer side of the second heat conducting plate and the outside air, which is beneficial to heat dissipation; a third heat conducting plate is provided through the top of the switching power supply housing, and a plurality of third external heat conducting fins arranged equidistantly from front to back are provided on the top of the third heat conducting plate, so as to increase the contact surface between the top of the third heat conducting plate and the outside air, which is beneficial to heat dissipation; compared with the fan heat dissipation adopted by the traditional switching power supply module, the technical solution can achieve the effect of noise reduction and heat dissipation, and avoid the switching power supply module from generating noise during operation.

[0009] Preferably, four circular holes a arranged in a matrix are provided on the front side of the front cover plate, and the four long bolts pass through the four circular holes a respectively. Circular fixing tubes are provided on the rear side of the front cover plate and at the positions of the four circular holes a.

[0010] Preferably, circular holes b for long bolts to pass through are provided on the front side of the circuit board and near the four corners, and first positioning rings are provided on the front side of the circuit board and at the positions of the four circular holes b. The rear ends of the four circular fixing tubes are respectively located in the four first positioning rings. When the position of the base plate is fixed, the rear ends of the four circular fixing tubes are against the front side of the circuit board.

[0011] Preferably, four internally threaded fixing columns arranged in a matrix are provided on the rear side of the inner wall of the switching power supply housing, and second positioning rings are provided on the rear side of the circuit board and at the positions of the four circular holes b. The front ends of the four internally threaded fixing columns are respectively located in the four second positioning rings. When the position of the bottom plate is fixed, the front ends of the four internally threaded fixing columns are abutted against the rear side of the circuit board, thereby further fixing the position of the circuit board.

[0012] Preferably, the threaded end of the long bolt passes through the circular hole a, the circular fixing tube, and the circular hole b in sequence and is threadedly connected to the internal threaded fixing column. Under the action of the long bolt, the relative positions of the internal threaded fixing column, the circular fixing tube and the front cover plate are fixed, thereby closing the switching power supply housing.

[0013] Preferably, a plurality of first inner heat-conducting fins arranged equidistantly from left to right are provided on the front side of the first heat-conducting plate, a plurality of second inner heat-conducting fins arranged equidistantly from front to back are provided on the opposite sides of the two second heat-conducting plates, and a plurality of third inner heat-conducting fins arranged equidistantly from front to back are provided on the bottom of the third heat-conducting plate, which is beneficial for the first heat-conducting plate, the second heat-conducting plate and the third heat-conducting plate to transfer heat inside the switching power supply housing.

[0014] Preferably, an L-shaped mounting seat is provided on the rear side of the switching power supply housing and at the left and right edges. The L-shaped mounting seat is provided with a mounting hole for mounting the switching power supply module. The rear side of the L-shaped mounting seat is located behind the rear side of the first outer heat-conducting fin to avoid collision between the first outer heat-conducting fin and the wall or the mounting frame.

[0015] Preferably, a U-shaped protective plate is provided on the rear side of the bottom of the switching power supply housing, and a frame-shaped stop block is provided on the top of the rear side of the inner wall of the U-shaped protective plate. The front side of the frame-shaped stop block is in contact with the rear side of the wiring terminal to support the wiring terminal, thereby preventing the staff from applying backward force to the wiring terminal during wiring and causing damage to the wiring terminal.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. For this miniaturized low-noise switching power supply module, after the front cover is removed, the bottom plate is directly pulled forward to separate the bottom plate from the two U-shaped positioning blocks to remove the wiring terminals and the circuit board, on which the components of the switching power supply are installed. Compared with the traditional switching power supply module, it does not require more connection structures, thereby reducing the volume and making it easier for the staff to maintain or repair the small switching power supply module.

[0018] 2. In the miniaturized low-noise switching power supply module, a plurality of first external heat-conducting fins are provided on the rear side of the first heat-conducting plate to increase the contact surface between the rear side of the first heat-conducting plate and the outside air; a plurality of second external heat-conducting fins are provided on the opposite sides of the two second heat-conducting plates to increase the contact surface between the outer side of the second heat-conducting plate and the outside air; a plurality of third external heat-conducting fins are provided on the top of the third heat-conducting plate to increase the contact surface between the top of the third heat-conducting plate and the outside air, which is beneficial to heat dissipation. Compared with the fan heat dissipation adopted in the traditional switching power supply module, the technical solution can achieve the effect of noise reduction and heat dissipation, and avoid the switching power supply module from generating noise during operation.

[0019] 3. In the miniaturized low-noise switching power supply module, the threaded end of the long bolt passes through the circular hole a, the circular fixing tube, and the circular hole b in sequence and is threadedly connected to the internal thread fixing column. Under the action of the long bolt, the relative positions of the internal thread fixing column, the circular fixing tube, and the front cover are fixed, thereby closing the switching power supply housing, which is convenient for the staff to quickly disassemble and assemble the switching power supply module.

[0020] 4. For the miniaturized low-noise switching power supply module, when the position of the bottom plate is fixed, the rear ends of the four circular fixing tubes abut against the front side of the circuit board, and the front ends of the four internally threaded fixing columns abut against the rear side of the circuit board, thereby further fixing the position of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0023] Figure 3 It is a schematic diagram of the overall exploded structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the internal assembly structure of the switch power supply housing in the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the switch power supply housing in the utility model;

[0026] Figure 6 It is one of the partial structural schematic diagrams of the utility model;

[0027] Figure 7 This is the second schematic diagram of the partial structure of the utility model;

[0028] Figure 8 This is the third partial structural schematic diagram of the utility model.

[0029] In the figure: 1. switch power supply housing; 10. internal thread fixing column; 11. U-shaped positioning block; 12. L-shaped mounting seat; 13. U-shaped protective plate; 14. frame-shaped block; 2. front cover; 20. circular hole a; 21. circular fixing tube; 3. bottom plate; 30. wire hole; 4. terminal; 5. circuit board; 50. circular hole b; 51. first positioning ring; 52. second positioning ring; 6. first heat conducting plate; 60. first inner heat conducting fin; 61. first outer heat conducting fin; 7. second heat conducting plate; 70. second inner heat conducting fin; 71. second outer heat conducting fin; 8. third heat conducting plate; 80. third inner heat conducting fin; 81. third outer heat conducting fin; 9. long bolt. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] See also Figure 1-Figure 8 , the utility model provides a technical solution:

[0033] A miniaturized low-noise switching power supply module comprises a switching power supply housing 1 with an open structure on the front side and the bottom. The front side of the switching power supply housing 1 is detachably connected to a front cover plate 2 by four long bolts 9. U-shaped positioning blocks 11 are provided at the bottom of the left and right sides of the inner wall of the switching power supply housing 1. A bottom plate 3 is inserted between the two U-shaped positioning blocks 11. The rear side of the front cover plate 2 fits the front side of the bottom plate 3. A wiring terminal 4 is provided at the bottom of the bottom plate 3. A plurality of wire holes 30 for the wires of the wiring terminal 4 to pass through are provided at the top of the bottom plate 3. A circuit board 5 of the switching power supply module is provided at the top and near the rear side of the bottom plate 3. After the front cover plate 2 is removed, the bottom plate 3 is directly pulled forward to separate the bottom plate 3 from the two U-shaped positioning blocks 11 so as to take out the wiring terminal 4 and the circuit board 5. The components of the switching power supply are installed on the circuit board 5. Compared with the traditional switching power supply module, more connection structures are not required, thereby reducing the volume and facilitating the maintenance or repair of the small switching power supply module by the staff.

[0034] A first heat conducting plate 6 is provided through the rear side of the switching power supply housing 1, and a plurality of first outer heat conducting fins 61 arranged equidistantly from left to right are provided on the rear side of the first heat conducting plate 6, so as to increase the contact surface between the rear side of the first heat conducting plate 6 and the outside air, which is beneficial to heat dissipation. Second heat conducting plates 7 are provided through the left and right sides of the switching power supply housing 1, and a plurality of second outer heat conducting fins 71 arranged equidistantly from front to back are provided on the opposite sides of the two second heat conducting plates 7, so as to increase the contact surface between the outer side of the second heat conducting plate 7 and the outside air, which is beneficial to heat dissipation. A third heat conducting plate 8 is provided through the top of the switching power supply housing 1, and a plurality of third outer heat conducting fins 81 arranged equidistantly from front to back are provided on the top of the third heat conducting plate 8, so as to increase the contact surface between the top of the third heat conducting plate 8 and the outside air, which is beneficial to heat dissipation. Compared with the fan heat dissipation adopted by the traditional switching power supply module, the technical scheme can achieve the effect of noise reduction and heat dissipation, and avoid the switching power supply module from generating noise during operation.

[0035] In this embodiment, four circular holes a20 arranged in a matrix are opened on the front side of the front cover plate 2, and four long bolts 9 pass through the four circular holes a20 respectively. Circular fixing tubes 21 are provided on the rear side of the front cover plate 2 and at the positions of the four circular holes a20.

[0036] Specifically, circular holes b50 for the long bolts 9 to pass through are provided on the front side of the circuit board 5 and near the four corners. First positioning rings 51 are provided on the front side of the circuit board 5 and at the positions of the four circular holes b50. The rear ends of the four circular fixing tubes 21 are respectively located in the four first positioning rings 51. When the position of the base plate 3 is fixed, the rear ends of the four circular fixing tubes 21 are against the front side of the circuit board 5.

[0037] Furthermore, four internally threaded fixing columns 10 arranged in a matrix are provided on the rear side of the inner wall of the switching power supply housing 1, and second positioning rings 52 are provided on the rear side of the circuit board 5 and at the positions of the four circular holes b50. The front ends of the four internally threaded fixing columns 10 are respectively located in the four second positioning rings 52. When the position of the base plate 3 is fixed, the front ends of the four internally threaded fixing columns 10 are abutted against the rear side of the circuit board 5, thereby further fixing the position of the circuit board 5.

[0038] Furthermore, the threaded end of the long bolt 9 passes through the circular hole a20, the circular fixing tube 21, and the circular hole b50 in sequence and is threadedly connected to the internal threaded fixing column 10. Under the action of the long bolt 9, the relative positions of the internal threaded fixing column 10, the circular fixing tube 21 and the front cover plate 2 are fixed, thereby closing the switching power supply housing 1.

[0039] Furthermore, a plurality of first inner heat conducting fins 60 are arranged equidistantly from left to right on the front side of the first heat conducting plate 6, a plurality of second inner heat conducting fins 70 are arranged equidistantly from front to back on the opposite sides of the two second heat conducting plates 7, and a plurality of third inner heat conducting fins 80 are arranged equidistantly from front to back on the bottom of the third heat conducting plate 8, which is beneficial for the first heat conducting plate 6, the second heat conducting plate 7 and the third heat conducting plate 8 to transfer heat inside the switching power supply housing 1.

[0040] Furthermore, an L-shaped mounting seat 12 is provided on the rear side of the switching power supply housing 1 and at the left and right edges. The L-shaped mounting seat 12 is provided with a mounting hole for installing the switching power supply module. The rear side of the L-shaped mounting seat 12 is located behind the rear side of the first external heat-conducting fin 61 to avoid the first external heat-conducting fin 61 from colliding with the wall or the mounting frame.

[0041] Furthermore, a U-shaped protective plate 13 is provided on the rear side of the bottom of the switching power supply housing 1, and a frame-shaped stop block 14 is provided on the top of the rear side of the inner wall of the U-shaped protective plate 13. The front side of the frame-shaped stop block 14 is in contact with the rear side of the wiring terminal 4 to support the wiring terminal 4, thereby preventing the staff from applying backward force to the wiring terminal 4 during wiring and causing damage to the wiring terminal 4.

[0042] When the miniaturized low-noise switching power supply module of this embodiment is in use, when heat is generated inside the switching power supply module, the multiple first inner heat-conducting fins 60 and the first heat-conducting plate 6 transfer the heat to the multiple first outer heat-conducting fins 61, the multiple second inner heat-conducting fins 70 and the second heat-conducting plate 7 transfer the heat to the multiple second outer heat-conducting fins 71, and the multiple third inner heat-conducting fins 80 and the third heat-conducting plate 8 transfer the heat to the multiple third outer heat-conducting fins 81, so that the heat generated by the switching power supply module when working is quickly dissipated without generating noise; when the staff needs to disassemble the switch When turning off the power module, the staff will remove all four long bolts 9, and then move the front cover 2 forward so that the rear ends of the four circular fixing tubes 21 are respectively moved out of the four first positioning rings 51. After that, the staff will pull the bottom plate 3 forward to completely separate the bottom plate 3 from the two U-shaped positioning blocks 11, thereby taking out the terminal blocks 4 and the circuit board 5. The components of the switching power supply are installed on the circuit board 5. Compared with the traditional switching power supply module, it does not require more connection structures, thereby reducing the volume and making it easier for the staff to maintain or repair the small switching power supply module.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A miniaturized low-noise switching power supply module, comprising a switching power supply housing (1) with an opening structure at the front and bottom, characterized in that: The front side of the switch power supply housing (1) is detachably connected to a front cover plate (2) via four long bolts (9); the bottoms of the left and right sides of the inner wall of the switch power supply housing (1) are both provided with U-shaped positioning blocks (11); a bottom plate (3) is inserted between the two U-shaped positioning blocks (11); the bottom of the bottom plate (3) is provided with a wiring terminal (4); the top of the bottom plate (3) is provided with a plurality of wire holes (30) for the wires of the wiring terminal (4) to pass through; a circuit board (5) of a switch power supply module is provided at the top of the bottom plate (3) and near the rear side; the switch power supply housing A first heat conducting plate (6) is provided through the rear side of the switch power supply housing (1), and a plurality of first external heat conducting fins (61) are provided on the rear side of the first heat conducting plate (6) and are arranged equidistantly from left to right; a second heat conducting plate (7) is provided through the left and right sides of the switch power supply housing (1), and a plurality of second external heat conducting fins (71) are provided on the opposite sides of the two second heat conducting plates (7) and are arranged equidistantly from front to back; a third heat conducting plate (8) is provided through the top of the switch power supply housing (1), and a plurality of third external heat conducting fins (81) are provided on the top of the third heat conducting plate (8) and are arranged equidistantly from front to back.

2. The miniaturized low-noise switching power supply module according to claim 1, characterized in that: The front side of the front cover plate (2) is provided with four circular holes a (20) arranged in a matrix, and the four long bolts (9) pass through the four circular holes a (20) respectively. The rear side of the front cover plate (2) and the positions of the four circular holes a (20) are each provided with a circular fixing tube (21).

3. The miniaturized low-noise switching power supply module according to claim 2, characterized in that: Circular holes b (50) for the long bolts (9) to pass through are provided on the front side of the circuit board (5) and near the four corners. First positioning rings (51) are provided on the front side of the circuit board (5) and at the positions of the four circular holes b (50). The rear ends of the four circular fixing tubes (21) are respectively located in the four first positioning rings (51).

4. The miniaturized low-noise switching power supply module according to claim 3, characterized in that: The rear side of the inner wall of the switch power supply housing (1) is provided with four internal thread fixing columns (10) arranged in a matrix, and the rear side of the circuit board (5) and the positions of the four circular holes b (50) are each provided with a second positioning ring (52), and the front ends of the four internal thread fixing columns (10) are respectively located in the four second positioning rings (52).

5. The miniaturized low-noise switching power supply module according to claim 4, characterized in that: The threaded end of the long bolt (9) passes through the circular hole a (20), the circular fixing tube (21), and the circular hole b (50) in sequence and is threadedly connected to the internal thread fixing column (10).

6. The miniaturized low-noise switching power supply module according to claim 1, characterized in that: The front side of the first heat conducting plate (6) is provided with a plurality of first inner heat conducting fins (60) arranged equidistantly from left to right, the opposite sides of the two second heat conducting plates (7) are each provided with a plurality of second inner heat conducting fins (70) arranged equidistantly from front to back, and the bottom of the third heat conducting plate (8) is provided with a plurality of third inner heat conducting fins (80) arranged equidistantly from front to back.

7. The miniaturized low-noise switching power supply module according to claim 1, characterized in that: An L-shaped mounting seat (12) is provided on the rear side of the switch power supply housing (1) and at the left and right edges. The L-shaped mounting seat (12) is provided with a mounting hole. The rear side of the L-shaped mounting seat (12) is located behind the rear side of the first outer heat conducting fin (61).

8. The miniaturized low-noise switching power supply module according to claim 1, characterized in that: A U-shaped protective plate (13) is provided at the rear side of the bottom of the switch power supply housing (1), a frame-shaped stop block (14) is provided at the top of the rear side of the inner wall of the U-shaped protective plate (13), and the front side of the frame-shaped stop block (14) is in contact with the rear side of the connection terminal (4).

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