CN211151515U - Board carries electric surge protection device and electronic equipment - Google Patents
Board carries electric surge protection device and electronic equipment Download PDFInfo
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- CN211151515U CN211151515U CN201921481020.XU CN201921481020U CN211151515U CN 211151515 U CN211151515 U CN 211151515U CN 201921481020 U CN201921481020 U CN 201921481020U CN 211151515 U CN211151515 U CN 211151515U
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Abstract
The embodiment of the utility model discloses board carries electric surge protection device and electronic equipment, include: a circuit board; the lightning protection device is welded on the circuit board through welding flux; and the elastic component comprises a first end and a second end, the first end of the elastic component is fixedly connected with the circuit board, the second end of the elastic component is fixedly connected with the lightning protection device, and the elastic component stores elastic potential energy. The embodiment of the utility model provides a technical scheme has realized when the circuit suffers thunderbolt or surge voltage, can guarantee under the condition that the lightning protection device lasts overflowing that the lightning protection device in time breaks away from the circuit, and guarantee circuit safety prevents the burning on fire, and the cost is lower.
Description
Technical Field
The embodiment of the utility model provides a relate to lightning protection technical field, especially relate to a board carries electric surge protection device and electronic equipment.
Background
The surge protection device provides a safety protection function for various electronic equipment, instruments and meters and communication lines and is widely applied, and the quality of the performance of the surge protection device is directly related to whether related equipment can work safely and reliably.
In the surge protection device in the prior art, a single voltage limiting type lightning protection element is adopted in a circuit or a switch type lightning protection device and a voltage limiting type lightning protection device are adopted to be connected in series for circuit protection, so that the safe operation of electronic equipment is protected.
However, when the line is struck by lightning or is in overvoltage, the lightning protection device can generate a large amount of heat under the condition of continuous overcurrent or overvoltage, and the line cannot be ensured to be safe due to fire and burning caused by overlong time. In addition, in the prior art, the temperature fuse is connected in series in the circuit, sometimes the temperature fuse is difficult to break, the circuit is overheated and burns, and the cost is relatively high.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a board carries electric surge protection device and electronic equipment to when realizing that the circuit suffers thunderbolt or surge voltage, can guarantee under the lightning protection device lasts the condition that overflows that the lightning protection device in time breaks away from the circuit, guarantee circuit safety prevents the burning on fire.
In a first aspect, an embodiment of the present invention provides a board-mounted surge protection device, including a circuit board;
the lightning protection device is welded on the circuit board through welding flux;
and the elastic component comprises a first end and a second end, the first end of the elastic component is fixedly connected with the circuit board, the second end of the elastic component is fixedly connected with the lightning protection device, and the elastic component stores elastic potential energy.
Optionally, the lightning protection device includes: a switching type protection device;
the first end of the switch-type protection device is electrically connected with the first power supply circuit and the third power supply circuit respectively, and the second end of the switch-type protection device is electrically connected with the second power supply circuit.
Optionally, the on-board surge protection device further includes a first voltage-limiting protection device and a second voltage-limiting protection device disposed on the circuit board;
the first end of the first voltage-limiting type protection device is electrically connected with the first power circuit, and the second end of the first voltage-limiting type protection device is electrically connected with the first end of the switch type protection device; and the first end of the second voltage-limiting type protection device is electrically connected with the third power supply circuit, and the second end of the second voltage-limiting type protection device is electrically connected with the first end of the switch type protection device.
Optionally, the switch-type protection device is a semiconductor discharge tube, a gas discharge tube or an open-circuit failure gas discharge tube; the voltage-limiting type protection device is a piezoresistor, a transient suppression diode or an electrostatic protector.
Optionally, the elastic component is a spring or a spring plate.
Optionally, the elastic component is a spring, and the spring is in a stretched state;
the circuit board comprises a fixing hole;
the first end of the spring is fixedly connected with the switch type protection device, and the second end of the spring is fixedly connected with the fixing hole.
Optionally, the elastic component is a spring, and the spring is in a compressed state;
the circuit board further comprises a cover plate;
the first end of the spring is fixedly connected with the cover plate, and the second end of the spring is fixedly connected with the switch type protection device.
Optionally, the on-board surge protection device further comprises an insulating chute;
the insulation sliding groove is fixed on the circuit board, and the switch type protection device is arranged inside the insulation sliding groove.
Optionally, the elastic component is a spring plate;
the second end of the switch-type protection device is electrically connected with the second power circuit through the elastic sheet; the first end of the elastic sheet is fixedly connected with the circuit board, and the second end of the elastic sheet is welded with the second end of the switch type protection device through welding flux.
In a second aspect, an embodiment of the present invention provides an electronic device, the electronic device is provided with the onboard surge protection device provided by any embodiment of the present invention.
The embodiment of the utility model provides a pass through the solder welding with the lightning protection device on the circuit board to set up elastomeric element and lightning protection device fixed connection, when the circuit suffered thunderbolt or surge voltage, can guarantee under the condition that the lightning protection device lasts overflowing that the lightning protection device in time breaks away from the circuit, guarantee circuit safety prevents the burning on fire. Compared with the prior art, the temperature fuse does not need to be connected in series in the circuit, and the cost is lower.
Drawings
FIG. 1 is a schematic diagram of an electrical connection structure of a board-mounted surge protection device in the prior art;
fig. 2 is a schematic structural diagram of a board-mounted surge protection device according to an embodiment of the present invention;
fig. 3 is a schematic view of an electrical connection structure of a board-mounted surge protection device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an electrical connection structure of another on-board surge protection device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of the on-board surge protection device after the elastic potential energy of the elastic component in FIG. 5 is released;
fig. 7 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of the on-board surge protection device of FIG. 7 after the elastic potential energy of the elastic component is released;
fig. 9 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of the on-board surge protection device after the elastic potential energy of the elastic component in fig. 9 is released;
fig. 11 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of the on-board surge protection device after the elastic potential energy of the elastic component in fig. 11 is released;
fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Referring to fig. 1, a circuit of the on-board surge protection device includes a first voltage-limiting lightning protection device 101, a second voltage-limiting lightning protection device 102, a third voltage-limiting lightning protection device 103, a switching lightning protection device 11, a first temperature fuse 121, a second temperature fuse 122, and a third temperature fuse 123, wherein a first end of the first voltage-limiting lightning protection device 101 is electrically connected to a live wire L through the first temperature fuse 121, a second end of the first voltage-limiting lightning protection device 101 is electrically connected to a neutral wire N, a first end of the second voltage-limiting lightning protection device 102 is electrically connected to the neutral wire N through the second temperature fuse 122, a second end of the second voltage-limiting lightning protection device 102 is electrically connected to a first end of the switching lightning protection device 11, a first end of the third voltage-limiting lightning protection device 103 is electrically connected to the live wire L through the third temperature fuse 123, a second end of the third voltage-limiting lightning protection device 103 is electrically connected to the first end of the switching lightning protection device 11, and a second end of the switching ground wire PE 11 is electrically connected to the ground wire.
Because there is continuous power frequency voltage between live wire L and the zero line N, there is the leakage current easily on voltage limiting type lightning protection device for voltage limiting type lightning protection device takes place the matter easily and becomes even the degradation, leads to lasting heavy current to pass through, if the lightning protection device can't in time break away from with the circuit, the burning of starting a fire can take place for the time overlength.
When the voltage-limiting lightning protection device connected in series with each temperature protector fails due to lightning strike and burns, the temperature protector senses the temperature rise of the voltage-limiting lightning protection device and is disconnected. Because the temperature fuse has poor accuracy in sensing the temperature of the voltage-limiting lightning protection device and slower heat sensing, and in order to enable the temperature fuse to bear lightning current, the temperature fuse with higher rated current needs to be selected, and the phenomenon that the temperature fuse is still not fused when the voltage-limiting lightning protection device is failed by lightning and is burnt by fire can occur, so that the safety of the conventional surge protection device is poor.
In view of this, the embodiment of the present invention provides a board-mounted surge protection device. Fig. 2 is a schematic structural diagram of a board-mounted surge protection device according to an embodiment of the present invention, and referring to fig. 2, the board-mounted surge protection device includes a circuit board 20;
the lightning protection device 30, the lightning protection device 30 is welded on the circuit board 20 through the solder;
the elastic component 40 includes a first end and a second end, the first end of the elastic component 40 is fixedly connected with the circuit board 20, the second end of the elastic component 40 is fixedly connected with the lightning protection device 30, and the elastic component 40 stores elastic potential energy.
Specifically, when the line is subjected to a lightning strike or overvoltage, the lightning protection device 30 can discharge the surge current to the ground or prevent the surge current from entering the circuit board 20. The lightning protection device 30 is soldered to the circuit board 20 by solder, wherein the solder may be low temperature solder such as tin-bismuth series solder, tin-zinc series solder, tin-indium series solder, and the like, or normal temperature solder. When the circuit board 20 is struck by lightning or surge voltage, under the effect of long-time overcurrent, the lightning protection device 30 can generate high heat, when the heat reaches the softening degree of solder, the elastic component 40 pulls the lightning protection device 30 apart, so that the lightning protection device 30 is separated from the circuit board, and accidental fire is prevented, wherein the first end of the elastic component 40 is fixedly connected with the fixing hole 60 arranged on the circuit board 20, and the second end is fixedly connected with the lightning protection device 30, so that the elastic component 40 is in a horizontal state and is parallel to the circuit board 20.
Additionally, compared with the prior art, the embodiment of the utility model provides an only adopt elastomeric element 40 to combine lightning protection device 30's self characteristic, just can realize that lightning protection device 30 breaks away from with circuit board 20 circuit, guarantee circuit safety, and do not need series connection temperature fuse, be favorable to reduce cost.
Fig. 3 is a schematic view of an electrical connection structure of a board-mounted surge protection device provided in an embodiment of the present invention, referring to fig. 2 and fig. 3, on the basis of the above embodiment, optionally, the lightning protection device 30 includes: the switching type guard device 31;
the first end a1 of the switch-type protection device 31 is electrically connected with the first power supply line and the third power supply line respectively, and the second end a2 is electrically connected with the second power supply line;
the lightning protection device 30 may also be a voltage limiting protection device. Specifically, the first power supply line is welded to the first end a1 of the switch-type protection device 31, the third power supply line is also welded to the first end a1 of the switch-type protection device 31, the second power supply line is welded to the second end a2 of the switch-type protection device 31, and the elastic member 40 is fixedly connected to the switch-type protection device 31. When the circuit is struck by lightning or surge voltage, under the action of long-time overcurrent, the switch-type protection device 31 can generate high heat, because the elastic component 40 stores elastic potential energy, when the heat reaches the softening degree of solder, the elastic component 40 pulls the switch-type protection device 31 open by utilizing the elastic potential energy, so that the first end A1 of the switch-type protection device 31 is disconnected with the first power supply circuit and the third power supply circuit, the second end A2 is disconnected with the second power supply circuit, namely, the second power supply circuit is disconnected with respect to the first power supply circuit and the third power supply circuit, and the first power supply circuit and the third power supply circuit are also disconnected with each other.
Exemplarily, first power supply line can be zero line N, and the second power supply line can be live wire L, and the third power supply line can be ground wire PE. in the in-service use, the circumstances that the power supply line joins conversely can appear, for example, connect live wire L and zero line N the condition of turning over, the embodiment of the utility model provides a can connect when turning over at live wire L and zero line N, second piezo-resistor 52 and switching type protector 31 connect and connect between anti-live wire L and ground wire PE, cut off and connect the power frequency afterflow of anti-live wire L and protection wire PE to ensure the line safety.
It should be noted that the first end a1 of the switch-type protection device 31 is not limited to be welded only to the first power line and the third power line, and other power lines may be additionally welded to the first end a1 according to actual needs to ensure the safety of the rear-stage circuit electrically connected to the on-board surge protection device. Just the embodiment of the utility model provides a do not make the restriction to the type of first power supply line, second power supply line and third power supply line, three power supply lines can arbitrary wiring.
Optionally, fig. 4 is a schematic view of an electrical connection structure of another onboard surge protection device provided in an embodiment of the present invention, and referring to fig. 4, after the first power line and the third power line are electrically connected, the first power line is electrically connected to the first end a1 of the switch-type protection device 31, the second power line is welded to the second end a2 of the switch-type protection device 31, and the elastic component 40 is fixedly connected to the switch-type protection device 31. When the circuit is struck by lightning or surge voltage, under the action of long-time overcurrent, the switch-type protection device 31 can generate high heat, because the elastic component 40 stores elastic potential energy, when the heat reaches the softening degree of solder, the elastic component 40 pulls the switch-type protection device 31 open by utilizing the elastic potential energy, so that the first end A1 of the switch-type protection device 31 is disconnected with the first power supply circuit and the third power supply circuit simultaneously, the second end A2 is disconnected with the second power supply circuit, namely, the second power supply circuit is disconnected with respect to the first power supply circuit and the third power supply circuit, but the first power supply circuit and the third power supply circuit still keep electric connection.
Fig. 3 and fig. 4 are schematic diagrams of electrical connection structures of the on-board surge protection device under different connection modes of the power lines, respectively, where fig. 3 is a schematic diagram of an electrical connection structure in which the first power line and the third power line are respectively welded to the first end a1 of the switch-type protection device 31, and fig. 4 is a schematic diagram of an electrical connection structure in which the first power line and the third power line are electrically connected.
Optionally, the on-board surge protection device further includes a first voltage-limiting protection device 51 and a second voltage-limiting protection device 52 disposed on the circuit board 20, a first end of the first voltage-limiting protection device 51 is electrically connected to the first power line, and a second end of the first voltage-limiting protection device 51 is electrically connected to the first end a1 of the switch-type protection device 31; the first terminal of the second voltage limiting protection device 52 is electrically connected to the third power line, and the second terminal of the second voltage limiting protection device 52 is electrically connected to the first terminal a1 of the switch-type protection device 31. On the basis of the above embodiment, the switch-type protection device 31 is a protection device which exhibits a high impedance characteristic when no lightning transient overvoltage occurs, and allows a lightning current to pass through, once the switch-type protection device responds to the lightning transient overvoltage, the impedance of the switch-type protection device is suddenly changed into a low impedance characteristic; when a large current is passed through the switching type protection device 31 for a long time, the switching type protection device 31 generates a high heat, causing a fire. The elastic component 40 is fixedly connected with the switch-type protection device 31, when the circuit board 20 is struck by lightning or subjected to surge voltage, the switch-type protection device 31 can generate high heat under the action of long-time overcurrent, and as the elastic component 40 stores elastic potential energy, when the heat reaches the softening degree of solder, the elastic component 40 utilizes the elastic potential energy to pull the lightning protection device 30 open, so that the switch-type protection device 31 is separated from the circuit board, and accidental fire is prevented.
With continued reference to fig. 3, the switch type protector 31 member is optionally a semiconductor discharge tube, a gas discharge tube, or an open circuit failure gas discharge tube; the voltage-limiting type protection device is a piezoresistor, a transient suppression diode or an electrostatic protector.
The semiconductor discharge Tube (TSS) is made by using the Thyristor principle, and the breakdown current of the PN junction triggers the device to conduct discharge, so that a large Surge current or pulse current can flow, and the breakdown voltage range constitutes the overvoltage protection range. Gas Discharge Tube (GDT) is a gap type lightning protection element, plays the functions of releasing lightning instantaneous overcurrent and limiting overvoltage in the circuit, has obvious advantages for lightning protection of high-frequency signal circuits because the interpolar insulation resistance of the GDT is very large and the parasitic capacitance is very small, and further improves the performance of protecting the power protection circuit from lightning impact. An Open Gas Discharge Tube (OGDT) is a protection device that can withstand lightning strikes and achieve an Open circuit failure function when a current exceeds a power frequency threshold. For example, the switch type protector 31 may be a gas discharge tube, and the voltage limiting type protection device may be a voltage dependent resistor, and since the parasitic capacitance of the gas discharge tube is small and the parasitic capacitance of the voltage dependent resistor is large, the parasitic capacitance of the line can be reduced after the gas discharge tube is connected in series with the voltage dependent resistor. When the line has no lightning stroke or surge voltage, the gas discharge tube can isolate the piezoresistor from the line system, so that no leakage current exists in the piezoresistor; when the circuit is struck by lightning, the gas discharge tube discharges and conducts rapidly, and under the action of the piezoresistor, the lightning current can be effectively inhibited, and the safety of the circuit is protected.
Alternatively, the switch-type guard device 31 may be an SMT package. SMT packaging is a surface mount technology for electronic devices, which can reduce the thickness of a circuit board, and when the switch-type protection device 31 is in an overcurrent condition for a long time, the high heat generated by the switch-type protection device 31 can make the switch-type protection device 31 more easily break away from a circuit, compared to DIP packaging.
Optionally, the elastic component 40 is a spring or a spring plate. The spring or the elastic sheet can store elastic potential energy, and the switch type protection device is separated from the circuit by utilizing the elastic potential energy.
Figure 5 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention,
fig. 6 is a schematic structural diagram of the on-board surge protection device after releasing elastic potential energy of the elastic component in fig. 5, and referring to fig. 5 and 6, the elastic component 40 is a spring, and the spring is in a stretching state;
the circuit board 20 includes fixing holes 60;
a first end of the spring is fixedly connected to the switch-type guard 31 and a second end of the spring is fixedly connected to the fixing hole 60.
Specifically, the first power supply line is electrically connected to the third power supply line, the first end of the switch-type protection device 31 is soldered to the first power supply line, and the second end of the switch-type protection device 31 is soldered to the second power supply line, the switch-type protection device 31 may be disposed on the first edge 210 side of the circuit board 20, and the securing hole 60 may be disposed on the second edge 220 side of the circuit board 20. illustratively, referring to FIG. 4, the first end A1 of the switch-type protection device 31 is electrically connected to the first power supply line N through the first voltage-limiting protection device 51, the second end A2 is electrically connected to the second power supply line L, and the third power supply line PE is electrically connected to the first end A1 through the second voltage-limiting protection device 52, i.e., the first power supply line N is electrically connected to the third power supply line PE. the voltage-limiting protection device may be a varistor, which is a resistor device having a non-linear characteristic, which, when an overvoltage is present across the varistor, may clamp a relatively fixed voltage to the varistor, when the varistor is exposed to both ends of the varistor, the varistor may be a relatively stable against an overcurrent, the overvoltage may be discharged from the switch-type protection device 31, and the second power supply line 31, and the overvoltage protection device may be protected from the overvoltage protection device, such as a relatively stable, and a relatively stable, such as a relatively stable, and a relatively stable overvoltage protection device, and a relatively stable, when the overvoltage protection device, such as a relatively stable, a relatively high voltage, and a.
Based on the above embodiments, for example, the first voltage limiting protection device 51 and the second voltage limiting protection device 52 may be disposed in parallel on the circuit board 20, and the switch type protection device 31 is disposed between the first voltage limiting protection device 51 and the second voltage limiting protection device 52. by disposing the switch type protection device 31 between the first voltage limiting protection device 51 and the second voltage limiting protection device 52 disposed in parallel, the electrical connection distance between the switch type protection device 31 and the second power line L may be shortened, and the impedance loss of the lines may be reduced, and the first voltage limiting protection device 51 and the second voltage limiting protection device 52 are disposed in parallel and symmetrical, the visual effect of the circuit board 20 may be beautified.
With continued reference to fig. 5, the circuit board 20 may further include oppositely disposed first and second edges 210, 220; the switch-type protection device 31 is disposed at the first edge 210, and the fixing hole 60 is disposed at the second edge 220. The embodiment of the utility model provides a set up like this, set up the both ends at the circuit board respectively with switch type protective device 31 and fixed orifices 60 in other words for switch type protective device 31 and fixed orifices 60's distance is far away, is favorable to the spring to save great elastic potential energy under tensile state, is enough when the solder is soft, pulls open lightning protection device 30, makes lightning protection device 30 break away from the circuit, prevents unexpected conflagration.
It should be noted that fig. 5 exemplarily shows that the switch-type protection device 31 is disposed at the first edge 210, and the fixing hole 60 is disposed at the second edge 220, which is not a limitation of the present invention, in other embodiments, the relative positions of the switch-type protection device 31 and the fixing hole 60 may be set according to needs, and may be set according to needs in practical applications.
Optionally, fig. 7 is a schematic structural diagram of another on-board surge protection device provided in an embodiment of the present invention, fig. 8 is a schematic structural diagram of the on-board surge protection device after elastic potential energy of the elastic component in fig. 7 is released, and referring to fig. 3, fig. 7 and fig. 8, exemplarily, the switch-type protection device 31 may be disposed at the second edge 220, and the fixing hole is disposed at the first edge 210. the first end of the first voltage-limiting protection device 51 is electrically connected to the first power line N, the second end of the first voltage-limiting protection device 51 is electrically connected to the first end a1 of the switch-type protection device 31, the first end of the second voltage-limiting protection device 52 is electrically connected to the third power line PE, the second end of the second voltage-limiting protection device 52 is electrically connected to the first end a1 of the switch-type protection device 31, and the second end a2 of the switch-type protection device 31 is electrically connected to the second power line L.
The spring is in a stretching state, stores elastic potential energy, when the circuit is struck by lightning or surge voltage, under the action of long-time overcurrent, the switch-type protection device 31 can generate high heat, when the heat reaches the softening degree of solder, the spring utilizes the stored elastic potential energy to pull the switch-type protection device 31 from the second edge 220 side to the first edge 210 side, so that the switch-type protection device 31 is separated from the circuit board, the second power supply line L is separated from the circuit board, the second power supply line L is separated from the first power supply line N, and the first power supply line N and the third power supply line PE are separated from the circuit at the same time without mutual interference, the second power supply line L is prevented from being reversely connected with the first power supply line N, the second power supply line L is ensured to be effectively separated from the circuit (as shown in fig. 8), the power utilization safety of the circuit is ensured, and accidental fire is prevented from happening.
It should be noted that fig. 7 is a schematic structural diagram of an on-board surge protection device in which the switch-type protection device 31 is not detached from the line, fig. 8 is a schematic structural diagram of the on-board surge protection device after the elastic potential energy of the elastic component in fig. 7 is released, and fig. 7 and fig. 8 only show the connection relationship between the devices, and do not limit the specific positions thereof, and do not limit the type of the power line at all.
Fig. 9 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention, fig. 10 is a schematic structural diagram of the on-board surge protection device after the elastic potential energy of the elastic component in fig. 9 is released, and fig. 10 is a schematic structural sectional diagram along a-a in fig. 9 for clearly showing a state after the elastic potential energy is released by the spring. On the basis of the above embodiments, referring to fig. 9 and 10, the elastic member 40 is a spring, and the spring is in a compressed state;
the circuit board 20 further includes a cover plate 70;
a first end of the spring is fixedly connected to the cover plate 70 and a second end of the spring is fixedly connected to the switch-type protection device 31.
Optionally, the on-board surge protection device further comprises an insulating chute 80; the insulating chute 80 is fixed to the circuit board 20, and the switch-type protection device 31 is disposed inside the insulating chute 80.
Specifically, the first end of the spring and the cover plate 70 may be riveted or welded by high temperature solder, so that the first end of the spring and the cover plate 70 can still be reliably connected after the switch-type protection device 31 generates high heat, the switch-type protection device 31 is disposed at the side of the cover plate 70, and the second end of the spring is fixedly connected to the switch-type protection device 31, so that the spring is in a compressed state and stores elastic potential energy, a slide may be disposed in the insulation slide 80, the switch-type protection device 31 is disposed in the slide, when the circuit is subjected to a lightning strike or surge voltage, the switch-type protection device 31 generates high heat under a long-time overcurrent, and when the heat reaches a softening degree of the solder, the spring pushes the switch-type protection device 31 away from the loop through the insulation slide 80 by using the stored elastic potential energy (refer to fig. 10), so that the second power line L is disconnected with respect to both the first power line N and the third power line PE, thereby ensuring the electrical safety of.
Fig. 11 is a schematic structural diagram of another on-board surge protection device according to an embodiment of the present invention, fig. 12 is a schematic structural diagram of the on-board surge protection device after elastic potential energy of the elastic component in fig. 11 is released, and referring to fig. 11 and 12, the elastic component 40 is a spring plate, the second end of the switch-type protection device 31 is electrically connected to the second power line L through the spring plate, the first end of the spring plate is fixedly connected to the circuit board 20, and the second end of the spring plate is welded to the second end of the switch-type protection device 31 through solder.
Specifically, the second end of the switch-type protection device 31 is electrically connected to the second power line L through a spring plate, that is, the spring plate is used as a conduction path between the second end of the switch-type protection device 31 and the second power line L, the first end of the spring plate is fixedly connected to the circuit board 20, so that the first end of the spring plate can still be reliably connected to the circuit board 20 after the switch-type protection device 31 generates high heat, the fixed connection mode can be rivet connection or welding by using high-temperature solder, when the circuit board 20 is subjected to lightning strike or surge voltage, the switch-type protection device 31 can generate high heat under long-time overcurrent action, when the heat reaches the softening degree of the solder, the conduction path between the second end of the spring plate and the second end of the switch-type protection device 31 and the solder between the second power line L is melted, the spring plate bounces the second end of the spring plate by using the stored elastic potential energy, the spring plate returns to the static state (refer to fig. 12), and the conduction path between the second end of the switch-type protection device 31 and the second power line L is disconnected, so that the second power line L is disconnected from the first power line N and the.
It should be noted that fig. 11 is a schematic structural diagram of an on-board surge protection device when the elastic sheet is welded to the switch-type protection device 31, fig. 12 is a schematic structural diagram of an on-board surge protection device after the elastic potential energy of the elastic sheet in fig. 11 is released, fig. 11 and fig. 12 only show the connection relationship between the elastic sheet and the switch-type protection device 31, and no limitation is made on the specific position of the elastic sheet, and in the embodiment of the present invention, the first power line may also be L, the second power line is N, and the third power line is PE, and the embodiment of the present invention does not make any limitation on the type of the power line.
The embodiment of the utility model provides a pass through the solder with switch type protector and weld on the circuit board to set up elastomeric element and switch type protector fixed connection, when the circuit suffered thunderbolt or surge voltage, can guarantee under the condition that switch type protector lasts overflowing that switch type protector in time breaks away from the circuit, guarantee circuit safety prevents the burning on fire. Compared with the prior art, the temperature fuse does not need to be connected in series in the circuit, the cost is lower, and the switch type protective device is easier to separate from the circuit.
The embodiment of the utility model provides an electronic equipment, figure 13 is the utility model provides a pair of electronic equipment's schematic structure diagram, this electronic equipment include the utility model discloses board year surge protection device that arbitrary embodiment provided. For example, the electronic device may be an electric device in an apparatus such as automotive electronics, communications, new energy, security, consumer electronics, industrial electronics, medical electronics, and the like. The embodiment of the utility model provides an electronic equipment includes the board that carries surge protection device in above-mentioned embodiment, consequently the embodiment of the utility model provides an electronic equipment also possesses the beneficial effect that describes in above-mentioned embodiment.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A board-mounted surge protection device is characterized by comprising:
a circuit board;
the lightning protection device is welded on the circuit board through welding flux;
and the elastic component comprises a first end and a second end, the first end of the elastic component is fixedly connected with the circuit board, the second end of the elastic component is fixedly connected with the lightning protection device, and the elastic component stores elastic potential energy.
2. An on-board surge protection device according to claim 1, wherein said lightning protection means comprises: a switching type protection device;
the first end of the switch-type protection device is electrically connected with the first power supply circuit and the third power supply circuit respectively, and the second end of the switch-type protection device is electrically connected with the second power supply circuit.
3. An on-board surge protection device according to claim 2, further comprising first and second voltage limiting protection devices disposed on said circuit board;
the first end of the first voltage-limiting type protection device is electrically connected with the first power circuit, and the second end of the first voltage-limiting type protection device is electrically connected with the first end of the switch type protection device; and the first end of the second voltage-limiting type protection device is electrically connected with the third power supply circuit, and the second end of the second voltage-limiting type protection device is electrically connected with the first end of the switch type protection device.
4. An on-board surge protection device according to claim 3, wherein said switching type protection device is a semiconductor discharge tube, a gas discharge tube, or an open failure gas discharge tube;
the voltage-limiting type protection device is a piezoresistor, a transient suppression diode or an electrostatic protector.
5. An on-board surge protection device according to claim 2, wherein the resilient member is a spring or a leaf spring.
6. An on-board surge protection device according to claim 5, wherein said resilient member is a spring, said spring being in tension;
the circuit board comprises a fixing hole;
the first end of the spring is fixedly connected with the switch type protection device, and the second end of the spring is fixedly connected with the fixing hole.
7. An on-board surge protection device according to claim 5, wherein said resilient member is a spring, said spring being in a compressed state;
the circuit board further comprises a cover plate;
the first end of the spring is fixedly connected with the cover plate, and the second end of the spring is fixedly connected with the switch type protection device.
8. An on-board surge protection device according to claim 7, further comprising an insulating chute;
the insulation sliding groove is fixed on the circuit board, and the switch type protection device is arranged inside the insulation sliding groove.
9. An on-board surge protection device according to claim 5, wherein said resilient member is a spring;
the second end of the switch-type protection device is electrically connected with the second power circuit through the elastic sheet; the first end of the elastic sheet is fixedly connected with the circuit board, and the second end of the elastic sheet is welded with the second end of the switch type protection device through welding flux.
10. An electronic device, characterized in that it is equipped with an on-board surge protection device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921481020.XU CN211151515U (en) | 2019-09-06 | 2019-09-06 | Board carries electric surge protection device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921481020.XU CN211151515U (en) | 2019-09-06 | 2019-09-06 | Board carries electric surge protection device and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN211151515U true CN211151515U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921481020.XU Active CN211151515U (en) | 2019-09-06 | 2019-09-06 | Board carries electric surge protection device and electronic equipment |
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| CN (1) | CN211151515U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416971A (en) * | 2019-09-06 | 2019-11-05 | 深圳市槟城电子有限公司 | A kind of onboard surge protection device |
| CN112688290A (en) * | 2020-12-29 | 2021-04-20 | 上海闪替电子科技有限公司 | Transient overvoltage protection device of LED street lamp driving power supply |
-
2019
- 2019-09-06 CN CN201921481020.XU patent/CN211151515U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416971A (en) * | 2019-09-06 | 2019-11-05 | 深圳市槟城电子有限公司 | A kind of onboard surge protection device |
| CN112688290A (en) * | 2020-12-29 | 2021-04-20 | 上海闪替电子科技有限公司 | Transient overvoltage protection device of LED street lamp driving power supply |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210527 Address after: 243000 south of workshop 1, building 5, 2189, huxinan Road, Maanshan economic and Technological Development Zone, Maanshan City, Anhui Province Patentee after: MAANSHAN Penang Electronics Co.,Ltd. Address before: 518116 west side of 1st floor, building e, area a, Hongfa Science Park, Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Bencent Electronics Co.,Ltd. |
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