CN212695894U

CN212695894U - Switch power supply

Info

Publication number: CN212695894U
Application number: CN202021585730.XU
Authority: CN
Inventors: 孙文运
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-12
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a switching power supply, which comprises a cuboid shell, a rectangular circuit board, a protective cover plate, a power cable and a switching power supply circuit; the rectangular circuit board is fixedly arranged in the cuboid-shaped shell; the protective cover plate is hinged to the front ends of the left side and the right side of the cuboid shell in a swinging mode and used for covering the strip-shaped wire holder after swinging; the switching power supply circuit comprises a fuse FU, a voltage dependent resistor RV, a thermistor RT, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an electrolytic capacitor C5, a diode D1, a diode D2, a diode D3 and a diode D4. The switch power supply can perform safety protection on the wiring on the strip-shaped wiring seat by using the protective cover plate, so that the safety in the use process is ensured; the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 are used as surge current absorption capacitors to absorb series mode interference pulses from a power supply, transient pulse interference of other strong electricity and high-frequency pulses mixed in a power grid.

Description

Switch power supply

Technical Field

The utility model relates to a power supply unit, especially a switching power supply.

Background

At present, the existing switching power supply is arranged in an open manner on a wiring side, and has no safety protection and certain danger in the use process. Therefore, it is necessary to design a switching power supply, which can perform safety protection on the wiring side and ensure safety in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: provided is a switching power supply which can perform safety protection on a wiring side and ensure use safety.

In order to achieve the above object, the present invention provides a switching power supply, which includes a rectangular casing, a rectangular circuit board, a protective cover plate, a power cable, and a switching power supply circuit disposed on the rectangular circuit board;

the rectangular circuit board is fixedly arranged in the cuboid-shaped shell; a wiring window is arranged on the front side of the cuboid shell, a strip-shaped wiring seat is transversely and fixedly arranged at the wiring window, and part of the strip-shaped wiring seat extends out of the wiring window; each wiring electrode plate is arranged on the strip-shaped wiring seat at intervals, and each wiring electrode plate is provided with a wiring bolt in a threaded screwing way; the two ends of the protective cover plate are respectively provided with a side edge strip-shaped plate, and the end parts of the two side edge strip-shaped plates are respectively installed at the front ends of the left side edge and the right side edge of the cuboid-shaped shell in a swing-type hinged mode; the section of the protective cover plate is L-shaped and is used for covering the strip-shaped wire holder after swinging; a threading pipe is arranged at the center of the rear side surface of the cuboid shell, one end of a power cable penetrates through the threading pipe to enter the cuboid shell, and the other end of the power cable is electrically connected with a power plug;

the switching power supply circuit comprises a fuse FU, a voltage dependent resistor RV, a thermistor RT, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an electrolytic capacitor C5, a diode D1, a diode D2, a diode D3 and a diode D4; one end of the fuse FU is electrically connected with a positive cable of the power supply cable, and the other end of the fuse FU is electrically connected with one end of the piezoresistor RV, one end of the capacitor C4, a negative end of the diode D1, one end of the capacitor C3 and a positive end of the diode D2 respectively; one end of the thermistor RT is electrically connected with a negative cable of the power cable, and the other end of the thermistor RT is electrically connected with the other end of the piezoresistor RV, one end of the capacitor C1, the negative end of the diode D4, the positive end of the diode D3 and one end of the capacitor C2 respectively; the positive terminal of the electrolytic capacitor C5 is electrically connected with the other terminal of the capacitor C3, the negative terminal of the diode D2, the other terminal of the capacitor C2 and the negative terminal of the diode D3 respectively; the negative end of the electrolytic capacitor C5 is electrically connected with the other end of the capacitor C4, the positive end of the diode D1, the other end of the capacitor C1 and the positive end of the diode D4 respectively; each voltage stabilizing circuit used for providing different voltage values is also arranged on the rectangular circuit board; the positive end of the electrolytic capacitor C5 is also electrically connected with the positive input end of each voltage stabilizing circuit, and the negative end of the electrolytic capacitor C5 is also electrically connected with the negative input end of each voltage stabilizing circuit; the positive output end of each voltage stabilizing circuit is electrically connected with the positive wiring electrode plate through an internal cable, and the negative output end of each voltage stabilizing circuit is electrically connected with the negative wiring electrode plate through an internal cable.

Furthermore, each insulating partition plate is arranged on the strip-shaped wire holder at intervals, and the wiring electrode plate is positioned between the insulating partition plates.

Furthermore, a strip-shaped partition plate is transversely arranged on the strip-shaped wire holder and used for transversely insulating and isolating the strip-shaped wire holder at the position of the wire connection window.

Furthermore, the rectangular circuit board is arranged in the middle of the cuboid-shaped shell through an insulating bolt, and a fan mounting hole is formed in the middle of the rectangular circuit board; the upper side, the lower side, the left side and the right side of the cuboid shell are provided with strip-shaped heat dissipation windows; a cooling fan is fixedly arranged on the fan mounting hole; and a positive power supply end and a negative power supply end of the cooling fan are electrically connected with a positive output end and a negative output end of the voltage stabilizing circuit corresponding to the output voltage.

Furthermore, the front ends of the left side and the right side of the cuboid shell are respectively provided with a circular groove; the groove edges of the two circular grooves are provided with strip-shaped grooves extending backwards; a strip-shaped convex block is arranged on the opposite inner sides of the end parts of the two side strip-shaped plates; two bar-shaped convex blocks are respectively embedded into the two circular grooves to realize hinged installation, and the bar-shaped convex blocks rotate to the horizontal direction and then move backwards to be respectively embedded into the two bar-shaped grooves.

Furthermore, rubber anti-slip convex edges used for clamping the strip-shaped convex blocks are arranged on the upper side groove edge and the lower side groove edge of the strip-shaped groove at intervals.

Furthermore, each U-shaped wiring notch is correspondingly arranged on the protective cover plate and at the position close to each wiring electrode plate.

The beneficial effects of the utility model reside in that: the wiring on the strip-shaped wiring seat can be safely protected by using the protective cover plate, so that the safety in the use process is ensured; the two side strip-shaped plates are used for realizing hinged installation, so that the protective cover plate can be lifted when an electric connection cable of load equipment is installed, and a wiring bolt can be operated conveniently to perform wiring pressing; the fuse FU can be timely fused when a rear-stage circuit is short-circuited or overcurrent is caused by other reasons, so that a protection effect is achieved; the voltage dependent resistor RV can be used for clamping voltage when the circuit bears overvoltage, absorbing redundant current and protecting a post-stage circuit; the thermistor RT can play a role of current insurance; a rectifying circuit is formed by a diode D1, a diode D2, a diode D3 and a diode D4, and alternating current is converted into direct current; the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 are used as surge current absorption capacitors, and the surge current absorption capacitors absorb series mode interference pulses from a power supply, transient pulse interference of other strong electricity and high-frequency pulses mixed into a power grid; the rectified pulsating dc voltage is converted into a relatively stable dc voltage by the charge/discharge characteristics of the electrolytic capacitor C5.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic diagram of a protective cover structure according to the present invention;

fig. 4 is a schematic diagram of the switching power supply circuit of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example 1:

as shown in fig. 1-4, the utility model discloses a switching power supply includes: the power supply device comprises a cuboid shell 1, a rectangular circuit board 10, a protective cover plate 2, a power supply cable 5 and a switching power supply circuit arranged on the rectangular circuit board 10;

the rectangular circuit board 10 is fixedly arranged in the cuboid shell 1; a wiring window is arranged on the front side of the cuboid shell 1, a strip-shaped wiring seat 17 is transversely and fixedly arranged at the wiring window, and the strip-shaped wiring seat 17 partially extends out of the wiring window; each wiring electrode plate 21 is arranged on the strip-shaped wiring seat 17 at intervals, and each wiring electrode plate 21 is provided with a wiring bolt 22 in a threaded manner; two ends of the protective cover plate 2 are respectively provided with a side edge strip shaped plate 7, and the end parts of the two side edge strip shaped plates 7 are respectively installed at the front ends of the left side edge and the right side edge of the cuboid-shaped shell 1 in a swing type hinge mode; the section of the protective cover plate 2 is L-shaped and is used for covering the strip-shaped wire holder 17 after swinging; a threading pipe 4 is arranged at the center of the rear side surface of the cuboid shell 1, one end of a power supply cable 5 penetrates through the threading pipe 4 to enter the cuboid shell 1, and the other end of the power supply cable 5 is electrically connected with a power supply plug 6;

the switching power supply circuit comprises a fuse FU, a voltage dependent resistor RV, a thermistor RT, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an electrolytic capacitor C5, a diode D1, a diode D2, a diode D3 and a diode D4; one end of the fuse FU is electrically connected with a positive cable of the power cable 5, and the other end of the fuse FU is electrically connected with one end of the piezoresistor RV, one end of the capacitor C4, a negative end of the diode D1, one end of the capacitor C3 and a positive end of the diode D2 respectively; one end of the thermistor RT is electrically connected with a negative cable of the power cable 5, and the other end of the thermistor RT is electrically connected with the other end of the piezoresistor RV, one end of the capacitor C1, the negative end of the diode D4, the positive end of the diode D3 and one end of the capacitor C2 respectively; the positive terminal of the electrolytic capacitor C5 is electrically connected with the other terminal of the capacitor C3, the negative terminal of the diode D2, the other terminal of the capacitor C2 and the negative terminal of the diode D3 respectively; the negative end of the electrolytic capacitor C5 is electrically connected with the other end of the capacitor C4, the positive end of the diode D1, the other end of the capacitor C1 and the positive end of the diode D4 respectively; each voltage stabilizing circuit used for providing different voltage values is also arranged on the rectangular circuit board; the positive end of the electrolytic capacitor C5 is also electrically connected with the positive input end of each voltage stabilizing circuit, and the negative end of the electrolytic capacitor C5 is also electrically connected with the negative input end of each voltage stabilizing circuit; the positive output end of each voltage stabilizing circuit is electrically connected with the positive wiring electrode plate through an internal cable, and the negative output end of each voltage stabilizing circuit is electrically connected with the negative wiring electrode plate through an internal cable.

The wiring on the strip-shaped wiring seat 17 can be safely protected by using the protective cover plate 2, so that the safety in the use process is ensured; the two side edge strip-shaped plates 7 are used for realizing hinged installation, so that the protective cover plate 2 can be lifted when an electric connection cable of load equipment is installed, and the wiring bolt 22 is conveniently operated to perform wiring pressing; the fuse FU can be timely fused when a rear-stage circuit is short-circuited or overcurrent is caused by other reasons, so that a protection effect is achieved; the voltage dependent resistor RV can be used for clamping voltage when the circuit bears overvoltage, absorbing redundant current and protecting a post-stage circuit; the thermistor RT can play a role of current insurance; a rectifying circuit is formed by a diode D1, a diode D2, a diode D3 and a diode D4, and alternating current is converted into direct current; the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 are used as surge current absorption capacitors, and the surge current absorption capacitors absorb series mode interference pulses from a power supply, transient pulse interference of other strong electricity and high-frequency pulses mixed into a power grid; the rectified pulsating dc voltage is converted into a relatively stable dc voltage by the charge/discharge characteristics of the electrolytic capacitor C5.

Further, insulating spacers 20 are provided at intervals on the bar-shaped wire holder 17, and a terminal electrode plate 21 is located between the insulating spacers 20. The insulating partition plate 20 can electrically isolate the terminal electrode plates 21 from each other, thereby providing a safety protection function.

Further, a strip-shaped partition plate 19 is transversely arranged on the strip-shaped wire holder 17 and used for transversely insulating and isolating the strip-shaped wire holder at the wire connection window. The strip-shaped partition plate 19 can play a role of safety protection at the wiring window.

Further, a rectangular circuit board 10 is mounted in the middle of the cuboid housing 1 through an insulating bolt 16, and a fan mounting hole 11 is formed in the middle of the rectangular circuit board 10; the upper side, the lower side, the left side and the right side of the cuboid shell 1 are provided with strip-shaped heat dissipation windows 3; a heat radiation fan 12 is fixedly arranged on the fan mounting hole 11; a positive power supply terminal and a negative power supply terminal of the heat dissipation fan 12 are electrically connected to a positive output terminal and a negative output terminal of the voltage stabilizing circuit corresponding to the output voltage. By utilizing the cooperation of the heat radiation fan 12 and the strip-shaped heat radiation window 3, the heat radiation performance can be enhanced, and the long-time stable operation of the switching power supply can be ensured.

Further, a circular groove 14 is formed at the front end of each of the left and right sides of the cuboid-shaped shell 1; a strip-shaped groove 13 extending backwards is arranged at the groove edge of each of the two circular grooves 14; the opposite inner sides of the end parts of the two side edge strip-shaped plates 7 are respectively provided with a strip-shaped convex block 8; two bar-shaped convex blocks 8 are respectively embedded into two circular grooves 14 to realize hinged installation, and the bar-shaped convex blocks 8 rotate to the horizontal and then move backwards to be respectively embedded into two bar-shaped grooves 13. The protective cover plate 2 can be locked after being translated towards the rear side by the matching of the strip-shaped convex blocks 8 and the strip-shaped grooves 13; by means of the matching of the strip-shaped convex blocks 8 and the circular grooves 14, the protective cover plate 2 can be turned upwards when an electric connection cable of load equipment is installed, and therefore wiring is convenient.

Further, rubber anti-slip ribs 15 for clamping the strip-shaped convex blocks 8 are arranged on the upper and lower side groove edges of the strip-shaped groove 13 at intervals. Utilize rubber anti-skidding bead 15 can carry out the antiskid to male bar lug 8 for bar lug 8 is difficult for breaking away from strip groove 13, ensures the stability of protective cover plate 2 when protecting.

Further, each U-shaped terminal notch 9 is provided on the protective cover 2 at a position corresponding to each terminal electrode plate 21. The use of the respective U-shaped wiring notches 9 facilitates the entry and exit of the electrical connection cables of the load device.

When the switch power supply is used, firstly, load equipment is electrically connected to the positive terminal electrode plate 21 and the negative terminal electrode plate 21, then the protective cover plate 2 is covered on the strip-shaped wire holder 17 to realize safety protection, and finally, the power plug 6 is inserted into a commercial power socket to start power supply; in the power supply process, the heat dissipation fan 12 is always in the working state, so that the heat dissipation inside the rectangular parallelepiped housing 1 is realized.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A switching power supply, characterized by: the power supply device comprises a cuboid shell (1), a rectangular circuit board (10), a protective cover plate (2), a power supply cable (5) and a switching power supply circuit arranged on the rectangular circuit board (10);

the rectangular circuit board (10) is fixedly arranged in the cuboid shell (1); a wiring window is arranged on the front side of the cuboid shell (1), a strip-shaped wiring seat (17) is transversely and fixedly arranged at the wiring window, and part of the strip-shaped wiring seat (17) extends out of the wiring window; each wiring electrode plate (21) is arranged on the strip-shaped wiring seat (17) at intervals, and each wiring electrode plate (21) is provided with a wiring bolt (22) in a threaded screwing way; two ends of the protective cover plate (2) are respectively provided with a side strip-shaped plate (7), and the end parts of the two side strip-shaped plates (7) are respectively installed at the front ends of the left side and the right side of the cuboid shell (1) in a swing-type hinged manner; the section of the protective cover plate (2) is L-shaped and is used for covering the strip-shaped wire holder (17) after swinging; a threading pipe (4) is arranged at the center of the rear side surface of the cuboid shell (1), one end of a power supply cable (5) penetrates through the threading pipe (4) to enter the cuboid shell (1), and the other end of the power supply cable (5) is electrically connected with a power supply plug (6);

the switching power supply circuit comprises a fuse FU, a voltage dependent resistor RV, a thermistor RT, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an electrolytic capacitor C5, a diode D1, a diode D2, a diode D3 and a diode D4; one end of the fuse FU is electrically connected with a positive cable of the power cable (5), and the other end of the fuse FU is electrically connected with one end of the piezoresistor RV, one end of the capacitor C4, a negative end of the diode D1, one end of the capacitor C3 and a positive end of the diode D2 respectively; one end of the thermistor RT is electrically connected with a negative cable of the power cable (5), and the other end of the thermistor RT is electrically connected with the other end of the piezoresistor RV, one end of the capacitor C1, the negative end of the diode D4, the positive end of the diode D3 and one end of the capacitor C2 respectively; the positive terminal of the electrolytic capacitor C5 is electrically connected with the other terminal of the capacitor C3, the negative terminal of the diode D2, the other terminal of the capacitor C2 and the negative terminal of the diode D3 respectively; the negative end of the electrolytic capacitor C5 is electrically connected with the other end of the capacitor C4, the positive end of the diode D1, the other end of the capacitor C1 and the positive end of the diode D4 respectively; each voltage stabilizing circuit used for providing different voltage values is also arranged on the rectangular circuit board (10); the positive end of the electrolytic capacitor C5 is also electrically connected with the positive input end of each voltage stabilizing circuit, and the negative end of the electrolytic capacitor C5 is also electrically connected with the negative input end of each voltage stabilizing circuit; the positive output end of each voltage stabilizing circuit is electrically connected with the positive wiring electrode plate (21) through an internal cable (18), and the negative output end of each voltage stabilizing circuit is electrically connected with the negative wiring electrode plate (21) through an internal cable (18).

2. The switching power supply according to claim 1, characterized in that: insulating partition plates (20) are arranged on the strip-shaped wire holder (17) at intervals, and a wiring electrode plate (21) is positioned between the insulating partition plates (20).

3. The switching power supply according to claim 1, characterized in that: a strip-shaped partition plate (19) is transversely arranged on the strip-shaped wire holder (17) and is used for being transversely insulated and isolated at the position of a wire connection window.

4. The switching power supply according to claim 1, characterized in that: the rectangular circuit board (10) is arranged in the middle of the cuboid shell (1) through an insulating bolt (16), and a fan mounting hole (11) is formed in the middle of the rectangular circuit board (10); the upper side, the lower side, the left side and the right side of the cuboid shell (1) are respectively provided with a strip-shaped heat dissipation window (3); a heat radiation fan (12) is fixedly arranged on the fan mounting hole (11); the positive power supply end and the negative power supply end of the cooling fan (12) are electrically connected with the positive output end and the negative output end of the voltage stabilizing circuit corresponding to the output voltage.

5. The switching power supply according to claim 1, characterized in that: a round groove (14) is arranged at the front end of each of the left side and the right side of the cuboid shell (1); a strip-shaped groove (13) extending backwards is arranged at the groove edge of each of the two circular grooves (14); a strip-shaped convex block (8) is arranged on the opposite inner sides of the end parts of the two side strip-shaped plates (7); two bar-shaped convex blocks (8) are respectively embedded into two circular grooves (14) to realize hinged installation, and the bar-shaped convex blocks (8) are rotated to the horizontal direction and then moved backwards to be respectively embedded into two bar-shaped grooves (13).

6. The switching power supply according to claim 1, characterized in that: rubber anti-slip convex ribs (15) used for clamping the strip-shaped convex blocks (8) are arranged on the upper side groove edge and the lower side groove edge of the strip-shaped groove (13) at intervals.

7. The switching power supply according to claim 1, characterized in that: and each U-shaped wiring notch (9) is correspondingly arranged on the protective cover plate (2) and at the position close to each wiring electrode plate (21).