CN114421739A

CN114421739A - Circuit protection structure of power management chip and working method thereof

Info

Publication number: CN114421739A
Application number: CN202210326149.3A
Authority: CN
Inventors: 陈福操
Original assignee: Henan Xinrui Electronic Technology Co ltd
Current assignee: Henan Xinrui Electronic Technology Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-04-29
Anticipated expiration: 2042-03-30
Also published as: CN114421739B

Abstract

The invention relates to the technical field of circuits, in particular to a circuit protection structure of a power management chip and a working method thereof, which comprises a circuit board, wherein a press type switch body is arranged on the circuit board, an installation component convenient to assemble is arranged on the circuit board, a rebounding component for assisting the rebounding of the press type switch body is arranged on the circuit board, a heat dissipation component for dissipating heat of the circuit board is arranged on the circuit board, and a pre-tightening component for pre-tightening the installation component is arranged on the heat dissipation component. In addition, the circuit board can be cooled, and the circuit board is prevented from generating a large amount of heat to influence the normal work of the circuit board.

Description

Circuit protection structure of power management chip and working method thereof

Technical Field

The invention relates to the technical field of circuits, in particular to a circuit protection structure of a power management chip and a working method thereof.

Background

Power management equipment includes circuit board and power management chip, during the equipment power management equipment, need install the power management chip on the circuit board, can install the switch on the circuit simultaneously, then install the shell on the circuit board, the switch of resilience formula is pressed in most adoption of present switch, but after permanent use, the resilience performance of pressing the switch obviously reduces, when circuit board and shell assembly simultaneously, often meet the problem that the circuit board can't assemble because of angle problem and shell.

Disclosure of Invention

The present invention is directed to a circuit protection structure of a power management chip and a working method thereof, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a circuit protection structure of power management chip, includes the circuit board, install the push type switch body on the circuit board, be provided with the installation component of the assembly of being convenient for on the circuit board, be provided with the resilience subassembly of supplementary push type switch body resilience on the circuit board, be provided with on the circuit board and carry out radiating radiator unit to the circuit board, the last pretension subassembly that carries out the pretension to the installation component that is provided with of radiator unit.

Optionally, the mounting assembly comprises a connecting seat, the connecting seat is fixedly assembled at the bottom of the circuit board, the bottom of the connecting seat is rotatably provided with a turntable, a mounting plate is fixedly mounted on the turntable, and a mounting hole is formed in one end, far away from the connecting seat, of the mounting plate.

Optionally, the circuit board is at least screwed with three screw nails, one end of each screw nail penetrates through the circuit board and is in threaded connection with the circuit board, the turntable is provided with at least six threaded holes, and one end of each screw nail is in threaded connection with the corresponding threaded hole.

Optionally, the rebounding assembly comprises a rebounding sheet, the rebounding sheet is L-shaped, one end of the rebounding sheet is U-shaped, and the U-shaped end of the rebounding sheet is movably connected with the pressing type switch body in an extruding mode.

Optionally, the threaded nail is fixed with the fixed disk, the fixed disk is provided with the connecting buckle in a rotating manner, one end of the connecting buckle is fixedly provided with a first telescopic spring, and one end of the first telescopic spring is fixedly connected with the resilience piece.

Optionally, fixed mounting has a fixing base on the circuit board, one side of fixing base is rotated and is installed the loose axle, the one end and the resilience piece fixed connection of loose axle, the restriction groove has been seted up on the fixed disk, the connector link is the T font, the inside in restriction groove now rotates to the one end of connector link, the one end size of connector link and the size of a dimension adaptation in restriction groove, fixed mounting has the restriction seat on the circuit board, first expanding spring and restriction seat through connection.

Optionally, the radiating component comprises a protective cylinder, at least six air-permeable grids are arranged on the protective cylinder, a motor is fixedly arranged at the top of the protective cylinder, a rotating shaft is arranged at the output end of the motor, a radiating blade is fixedly arranged on the rotating shaft, and the radiating blade rotates inside the protective cylinder.

Optionally, the pre-tightening assembly comprises a base, the base is fixedly assembled on the circuit board, the protective cylinder is fixedly assembled on the base, and a through groove is formed in one side of the base.

Optionally, the rotation axis on the motor output end runs through the inner wall of base, be fixed with first stripper bar on the rotation axis, fixed mounting stripper block on the fixed disk, stripper block and first stripper bar swing extrusion are connected, the spout has been seted up to the inside of first stripper bar, the inside fixed mounting of spout has the second expanding spring, the inside slidable mounting of first stripper bar has the second stripper bar, the second stripper bar slides in the inside of spout, just second stripper bar and second expanding spring fixed connection, the second stripper bar is connected with stripper block swing extrusion, the second stripper bar is the circular arc design with the mutual extruded one end of stripper block, the one end of second stripper bar is connected with the inner wall slidable extrusion of base.

A working method of a circuit protection structure of a power management chip comprises the following steps:

when the circuit board is assembled with the shell, the rotary disc is fixedly assembled on the shell through the mounting hole on the mounting plate, then the rotary disc rotates on the rotary disc through the connecting seat, the circuit board can adjust the installation angle through the rotation of the connecting seat, after the adjustment is finished, the circuit board is screwed on the circuit board through the threaded screw, when the threaded screw is screwed, the threaded screw drives the fixed disc to rotate, the connecting buckle rotates in the limiting groove, then the threaded screw is screwed with the threaded hole on the rotary disc, so that the circuit board is stably installed, when the pressing type switch body is pressed, the pressing type switch body extrudes the rebound piece to move, the rebound piece rotates on the fixed seat through the movable shaft, when the rebound piece rotates, the first expansion spring is pulled, when the pressing type switch body is cancelled, the pulled first expansion spring drives the rebound piece to reversely rotate through the movable shaft, and the rebound piece rebounds the pressing type auxiliary switch body, the limiting seat can limit the first telescopic spring, the motor is started to work, the output end of the motor drives the rotating shaft to rotate, the rotating shaft drives the radiating blades to rotate, the radiating blades rotate in the protective barrel, the radiating blades drive air to circulate at an accelerated speed when rotating, the air circulates through the ventilating grid and can radiate heat of the circuit board, when the rotating shaft rotates, the rotating shaft drives the first extrusion rod to rotate, the first extrusion rod drives the second extrusion rod to rotate to the through groove on one side of the base, the second extrusion rod rotates to extrude the extrusion block, the extrusion block drives the fixed disk to rotate, the fixed disk and the threaded nail are fixedly assembled together, therefore, when the second extrusion rod rotates to extrude the extrusion block, the threaded nail can be pre-tightened, when the first extrusion rod drives the second extrusion rod to rotate to slide into the base, the second extrusion rod extrudes the inner wall of the base, the second extrusion rod will extrude the second expansion spring, and at the same time, the second extrusion rod will slide into the chute.

Compared with the prior art, the invention has the beneficial effects that:

1. through the mounting hole on the mounting panel, with carousel fixed assembly to the shell, then the circuit board passes through the connecting seat and rotates the angle that can adjust the installation on the carousel, mediates the back that finishes, on being connected to the circuit board through the screw bolt spiro union, then screw bolt and the screw hole spiro union on the carousel, make the circuit board installation stable, can adjust the angle of circuit board in a flexible way through the installation component, avoid leading to the circuit board can't assemble together with the shell because of the angle reason of circuit board.

2. When pressing the push type switch body, push type switch body extrusion shell fragment removes, it is rotatory on the fixing base that the shell fragment passes through the loose axle to kick-back the piece, will stimulate first expanding spring when the shell fragment is rotatory, when the push type switch body is pressed in the cancellation, will drive back the shell fragment and pass through loose axle antiport by the first expanding spring of pulling, it will assist the resilience of push type switch body to return the shell fragment, the restriction seat can play the limiting displacement to first expanding spring, can help the push type switch body to press the back from this, avoid the push type switch body to press for a long time, the resilience performance variation can't kick-back completely.

3. Open the motor work, the output of motor drives the rotation axis and rotates, and the rotation axis drives the heat dissipation leaf and rotates, and the heat dissipation leaf rotates in the inside of a protection section of thick bamboo, drives the circulation with higher speed of air when the heat dissipation leaf rotates, and the air circulates through ventilative bars, can dispel the heat to the circuit board, avoids the circuit board to produce a large amount of heats, influences the normal work of circuit board.

4. When the rotation axis rotates, the rotation axis drives first extrusion pole and rotates, when first extrusion pole drives the second extrusion pole and rotates to one side of base and leads to the groove, the second extrusion pole rotates will extrude the extrusion piece, the extrusion piece drives the fixed disk and rotates, because the fixed disk is in the same place with the screw nail fixed assembly, when second extrusion pole rotates extrusion piece from this, can play the pretension effect to the screw nail, can avoid the installation component to take place not hard up when using, influence the normal work of circuit board.

Drawings

FIG. 1 is a schematic diagram of an overall circuit protection structure of a power management chip according to the present invention;

FIG. 2 is a partial cross-sectional view of a circuit protection structure of a power management chip according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of a partial structure of a resilient component of a circuit protection structure of a power management chip according to the present invention;

FIG. 4 is a partial cross-sectional view of a resilient component of a circuit protection architecture of a power management chip according to one embodiment of the present invention;

FIG. 5 is a partial cross-sectional view of a resilient component of the circuit protection architecture of a power management chip according to the present invention;

FIG. 6 is a cross-sectional view of a protection cylinder of a circuit protection structure of a power management chip according to the present invention;

FIG. 7 is a partial cross-sectional view of a circuit protection structure of a power management chip according to a second embodiment of the present invention;

fig. 8 is a partial cross-sectional view of a pre-tightening assembly of a circuit protection structure of a power management chip according to the present invention.

In the figure: 1. a circuit board; 2. a push type switch body; 3. mounting the component; 31. a connecting seat; 32. a turntable; 33. mounting a plate; 34. a threaded nail; 35. a threaded hole; 4. a rebound assembly; 41. returning the elastic sheet; 42. fixing the disc; 43. a connecting buckle; 44. a restriction seat; 45. a first extension spring; 46. a fixed seat; 47. a limiting groove; 5. a heat dissipating component; 51. a protective cylinder; 52. a motor; 53. a heat-dissipating leaf; 6. a pre-tightening assembly; 61. a base; 62. a first extrusion stem; 63. extruding the block; 64. a second extrusion stem; 65. a second extension spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides a circuit protection structure of a power management chip, including a circuit board 1, a push switch body 2 is mounted on the circuit board 1, a mounting assembly 3 is disposed on the circuit board 1 for easy assembly, the angle of the circuit board 1 can be flexibly adjusted by the mounting assembly 3 to prevent the circuit board 1 from being assembled with a housing due to the angle of the circuit board 1, a rebound assembly 4 is disposed on the circuit board 1 to assist the rebound of the push switch body 2, the rebound assembly 4 can help the push switch body 2 rebound after being pressed, thereby preventing the push switch body 2 from being pressed for a long time and from complete rebound due to poor rebound performance, a heat dissipation assembly 5 is disposed on the circuit board 1 to dissipate heat from the circuit board 1, the heat dissipation assembly 5 can dissipate heat from the circuit board 1 to prevent the circuit board 1 from generating a large amount of heat, influence circuit board 1 and normally work, be provided with on the radiator unit 5 and carry out the pretension subassembly 6 of pretension to installation component 3, can avoid installation component 3 to take place to become flexible when using through pretension subassembly 6.

As shown in fig. 2, the mounting assembly 3 includes a connecting seat 31, the connecting seat 31 is fixedly assembled at the bottom of the circuit board 1, a rotating disc 32 is rotatably installed at the bottom of the connecting seat 31, a mounting plate 33 is fixedly installed on the rotating disc 32, and a mounting hole is opened at one end of the mounting plate 33 far away from the connecting seat 31.

As shown in fig. 2 and 3, at least three screw nails 34 are screwed on the circuit board 1, one ends of the screw nails 34 penetrate through the screw connection with the circuit board 1, at least six threaded holes 35 are formed in the rotary plate 32, one ends of the screw nails 34 are screwed with the threaded holes 35, the circuit board 1 can be preliminarily mounted on the shell through the mounting plate 33, then the rotary plate 32 rotates on the connecting seat 31, the angle of the circuit board 1 is adjusted, and the circuit board 1 and the shell can be flexibly assembled together according to actual conditions.

As shown in fig. 3 and 4, the resilient member 4 includes a resilient piece 41, the resilient piece 41 is L-shaped, one end of the resilient piece 41 is U-shaped, and one end of the U-shaped resilient piece 41 is movably connected to the push switch body 2 in an extruding manner, and the resilient piece 41 can be clamped to the push switch body 2 by the U-shaped resilient piece 41, and when the push switch body 2 is pressed, the resilient piece 41 can be pushed by the push switch body 2 to move.

As shown in fig. 3 and 4, the fixing plate 42 is fixedly assembled on the screw 34, the connecting buckle 43 is rotatably installed on the fixing plate 42, the first expansion spring 45 is fixedly installed at one end of the connecting buckle 43, one end of the first expansion spring 45 is fixedly connected with the rebound sheet 41, when the rebound sheet 41 rotates, the first expansion spring 45 is pulled by one end of the rebound sheet 41, the pulled first expansion spring 45 can drive the rebound sheet 41 to rotate reversely, and the rebound sheet 41 can assist the push type switch body 2 to rebound.

As shown in fig. 3, fig. 4, and fig. 5, a fixing seat 46 is fixedly mounted on the circuit board 1, a movable shaft is rotatably mounted on one side of the fixing seat 46, one end of the movable shaft is fixedly connected to the resilient sheet 41, a limiting groove 47 is formed in the fixed disk 42, the connecting buckle 43 is T-shaped, one end of the connecting buckle 43 rotates inside the limiting groove 47, one end of the connecting buckle 43 is matched with the limiting groove 47 in size, a limiting seat 44 is fixedly mounted on the circuit board 1, the first expansion spring 45 is connected with the limiting seat 44 in a penetrating manner, when the screw 34 is screwed with the circuit board 1, the screw 34 drives the fixed disk 42 to rotate, the connecting buckle 43 can rotate inside the limiting groove 47, the connecting buckle 43 is prevented from rotating along with the fixed disk 42, the connecting buckle 43 drives the resilient sheet 41 to move, and the resilient sheet 41 extrudes the pressing type switch body 2.

As shown in fig. 6 and 7, the heat dissipation assembly 5 includes a protection cylinder 51, at least six air-permeable grids are provided on the protection cylinder 51, a motor 52 is fixedly mounted at the top of the protection cylinder 51, a rotation shaft is mounted at the output end of the motor 52, a heat dissipation blade 53 is fixedly mounted on the rotation shaft, the heat dissipation blade 53 rotates inside the protection cylinder 51, the motor 52 drives the heat dissipation blade 53 to rotate, the heat dissipation of the circuit board 1 can be performed, and the circuit board 1 is prevented from being incapable of working normally due to high temperature.

As shown in fig. 7 and 8, the pre-tightening assembly 6 includes a base 61, the base 61 is fixedly assembled on the circuit board 1, the protective cylinder 51 is fixedly assembled on the base 61, one side of the base 61 is a through groove, the through groove is designed on one side of the base 61, the first extrusion rod 62 drives the second extrusion rod 64 to rotate to the through groove, the second extrusion rod 64 can extrude with the extrusion block 63, and the protective cylinder 51 can protect the heat dissipation fins 53.

As shown in fig. 7 and 8, the rotating shaft at the output end of the motor 52 penetrates through the inner wall of the base 61, the rotating shaft is fixedly provided with a first extruding rod 62, the fixed disk 42 is fixedly provided with an extruding block 63, the extruding block 63 is movably extruded with the first extruding rod 62, the first extruding rod 62 and the extruding block 63 are movably extruded, the extruding block 63 can drive the fixed disk 42 to rotate, and the fixed disk 42 enables the screw thread of the screw thread nail 34 to be more stable with the screw thread of the circuit board 1 and the screw thread hole 35.

As shown in fig. 7 and 8, a sliding groove is formed in the first extrusion rod 62, a second expansion spring 65 is fixedly mounted in the sliding groove, a second extrusion rod 64 is slidably mounted in the first extrusion rod 62, the second extrusion rod 64 slides in the sliding groove, the second extrusion rod 64 is fixedly connected with the second expansion spring 65, the second extrusion rod 64 is movably connected with the extrusion block 63 in an extrusion manner, one end of the second extrusion rod 64, which is extruded with the extrusion block 63, is designed to be an arc, one end of the second extrusion rod 64 is connected with the inner wall of the base 61 in a sliding extrusion manner, one end of the second extrusion rod 64, which is extruded with the extrusion block 63, is designed to be an arc, and the second extrusion rod 64 and the extrusion block 63 can be prevented from being clamped when being extruded with each other.

The working principle is as follows: when the circuit board 1 is assembled with the housing, the rotary disc 32 is fixedly assembled on the housing through the mounting hole on the mounting plate 33, then the circuit board 1 rotates on the rotary disc 32 through the connecting seat 31, the mounting angle can be adjusted through the rotation of the connecting seat 31, after the adjustment is finished, the circuit board 1 is screwed on the circuit board 1 through the screw thread 34, when the screw thread 34 is screwed, the screw thread 34 drives the fixed disc 42 to rotate, the connecting buckle 43 rotates inside the limiting groove 47, then the screw thread 34 is screwed with the screw hole 35 on the rotary disc 32, so that the circuit board 1 is stably mounted, when the press type switch body 2 is pressed, the press type switch body 2 extrudes the rebound piece 41 to move, the rebound piece 41 rotates on the fixed seat 46 through the movable shaft, when the rebound piece 41 rotates, the first telescopic spring 45 is pulled, when the press type switch body 2 is cancelled, the pulled first telescopic spring 45 drives the rebound piece 41 to reversely rotate through the movable shaft, the rebound sheet 41 rebounds the auxiliary push type switch body 2, the limiting seat 44 can limit the first expansion spring 45, the motor 52 is turned on to work, the output end of the motor 52 drives the rotating shaft to rotate, the rotating shaft drives the heat dissipation blade 53 to rotate, the heat dissipation blade 53 rotates in the protection barrel 51, the air is driven to circulate at an accelerated speed when the heat dissipation blade 53 rotates, the air circulates through the air permeable grid, the heat dissipation can be performed on the circuit board 1, when the rotating shaft rotates, the rotating shaft drives the first extrusion rod 62 to rotate, when the first extrusion rod 62 drives the second extrusion rod 64 to rotate to the through groove at one side of the base 61, the second extrusion rod 64 rotates to extrude the extrusion block 63, the extrusion block 63 drives the fixed disk 42 to rotate, because the fixed disk 42 and the screw 34 are fixedly assembled together, when the second extrusion rod 64 rotates to extrude the extrusion block 63, the pre-tightening effect can be performed on the screw 34, when the first pressing rod 62 drives the second pressing rod 64 to rotate and slide into the base 61, the second pressing rod 64 will press against the inner wall of the base 61, the second pressing rod 64 will press the second expansion spring 65, and the second pressing rod 64 will slide into the chute.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a circuit protection structure of power management chip, includes circuit board (1), its characterized in that, install push type switch body (2) on circuit board (1), be provided with installation component (3) of being convenient for the assembly on circuit board (1), be provided with resilience subassembly (4) that supplementary push type switch body (2) kick-backed on circuit board (1), be provided with on circuit board (1) and carry out radiating radiator unit (5) to circuit board (1), be provided with on radiator unit (5) and carry out pretension subassembly (6) that pretension to installation component (3).

2. The circuit protection structure of a power management chip according to claim 1, wherein the mounting assembly (3) comprises a connecting seat (31), the connecting seat (31) is fixedly assembled at the bottom of the circuit board (1), a rotating disc (32) is rotatably installed at the bottom of the connecting seat (31), a mounting plate (33) is fixedly installed on the rotating disc (32), and a mounting hole is formed at one end of the mounting plate (33) far away from the connecting seat (31).

3. The circuit protection structure of a power management chip according to claim 2, wherein the circuit board (1) is screwed with at least three screw nails (34), one ends of the screw nails (34) are screwed with the circuit board (1) in a penetrating manner, the turntable (32) is provided with at least six threaded holes (35), and one ends of the screw nails (34) are screwed with the threaded holes (35).

4. The circuit protection structure of a power management chip according to claim 3, wherein the resilient member (4) comprises a resilient plate (41), the resilient plate (41) is L-shaped, one end of the resilient plate (41) is U-shaped, and the U-shaped end of the resilient plate (41) is movably connected to the push switch body (2) in a pressing manner.

5. The circuit protection structure of a power management chip according to claim 4, wherein the screw nail (34) is fixedly assembled with a fixing plate (42), the fixing plate (42) is rotatably assembled with a connecting buckle (43), one end of the connecting buckle (43) is fixedly assembled with a first expansion spring (45), and one end of the first expansion spring (45) is fixedly connected with the resilient sheet (41).

6. The circuit protection structure of a power management chip according to claim 5, characterized in that, fixed mounting has fixing base (46) on circuit board (1), one side of fixing base (46) is rotated and is installed the loose axle, the one end and the shell fragment (41) fixed connection that return of loose axle, restriction groove (47) have been seted up on fixed disk (42), connector link (43) are the T font, the inside of restriction groove (47) is now rotated to the one end of connector link (43), the one end size of connector link (43) and the size of the size adaptation of restriction groove (47), fixed mounting has restriction seat (44) on circuit board (1), first expanding spring (45) and restriction seat (44) through connection.

7. The circuit protection structure of the power management chip according to claim 6, wherein the heat dissipation assembly (5) comprises a protection cylinder (51), at least six air-permeable grids are arranged on the protection cylinder (51), a motor (52) is fixedly mounted at the top of the protection cylinder (51), a rotating shaft is mounted at the output end of the motor (52), a heat dissipation blade (53) is fixedly mounted on the rotating shaft, the heat dissipation blade (53) rotates inside the protection cylinder (51), the pre-tightening assembly (6) comprises a base (61), the base (61) is fixedly assembled on the circuit board (1), the protection cylinder (51) is fixedly assembled on the base (61), and a through groove is formed in one side of the base (61).

8. The circuit protection structure of a power management chip according to claim 7, wherein a rotating shaft at the output end of the motor (52) penetrates through the inner wall of the base (61), a first extrusion rod (62) is fixedly arranged on the rotating shaft, an extrusion block (63) is fixedly arranged on the fixed disk (42), and the extrusion block (63) is movably connected with the first extrusion rod (62) in an extrusion manner.

9. The circuit protection structure of a power management chip according to claim 8, wherein a sliding slot is formed in the first extrusion rod (62), a second expansion spring (65) is fixedly installed in the sliding slot, a second extrusion rod (64) is slidably installed in the first extrusion rod (62), the second extrusion rod (64) slides in the sliding slot, the second extrusion rod (64) is fixedly connected with the second expansion spring (65), the second extrusion rod (64) is movably connected with the extrusion block (63) in an extrusion manner, one end of the second extrusion rod (64) and one end of the extrusion block (63) which are extruded with each other are designed as an arc, and one end of the second extrusion rod (64) is slidably connected with the inner wall of the base (61) in an extrusion manner.

10. The method of claim 9, comprising the steps of:

when the circuit board (1) is assembled with the shell, the rotary disc (32) is fixedly assembled on the shell through the mounting hole on the mounting plate (33), then the rotary disc (32) rotates on the rotary disc (32) through the connecting seat (31), the installation angle of the circuit board (1) can be adjusted through the rotation of the connecting seat (31), after the adjustment is finished, the circuit board (1) is screwed on through the screw nail (34), when the screw nail (34) is screwed, the screw nail (34) drives the fixed disc (42) to rotate, the connecting buckle (43) rotates in the limiting groove (47), then the screw nail (34) is screwed with the threaded hole (35) on the rotary disc (32), so that the circuit board (1) is stably installed, when the pressing type switch body (2) is pressed, the pressing type switch body (2) extrudes the return spring piece (41) to move, the return spring piece (41) rotates on the fixed seat (46) through the movable shaft, when the rebound sheet (41) rotates, the first expansion spring (45) is pulled, when the pressing type switch body (2) is cancelled, the pulled first expansion spring (45) drives the rebound sheet (41) to reversely rotate through the movable shaft, the rebound sheet (41) rebounds the auxiliary pressing type switch body (2), the limiting seat (44) can limit the first expansion spring (45), the motor (52) is turned on to work, the output end of the motor (52) drives the rotating shaft to rotate, the rotating shaft drives the heat dissipation blade (53) to rotate, the heat dissipation blade (53) rotates in the protective barrel (51), the heat dissipation blade (53) drives air to circulate at an accelerated speed when rotating, the air circulates through the ventilating grid, the circuit board (1) can dissipate heat, when the rotating shaft rotates, the rotating shaft drives the first extrusion rod (62) to rotate, the first extrusion rod (62) drives the second extrusion rod (64) to rotate to one side of the through groove (61), the second extrusion rod (64) rotates to extrude the extrusion block (63), the extrusion block (63) drives the fixed disk (42) to rotate, the fixed disk (42) is fixedly assembled with the threaded nail (34), therefore, when the second extrusion rod (64) rotates to extrude the extrusion block (63), the threaded nail (34) can be pre-tightened, the first extrusion rod (62) drives the second extrusion rod (64) to rotate to slide into the base (61), the second extrusion rod (64) extrudes the inner wall of the base (61), the second extrusion rod (64) extrudes the second telescopic spring (65), and meanwhile, the second extrusion rod (64) slides into the sliding groove.