CN210007380U

CN210007380U - kinds of small volume lightning protection module

Info

Publication number: CN210007380U
Application number: CN201920630828.3U
Authority: CN
Inventors: 沈能文; 王旭明; 胡勇; 王炎林
Original assignee: SHENZHEN RUILONGYUAN ELECTRONICS Co Ltd
Current assignee: SHENZHEN RUILONGYUAN ELECTRONICS Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-31
Anticipated expiration: 2029-04-30

Abstract

The utility model provides an kind of small size lightning protection module, this small size lightning protection module include shell, PCB board and first ware subassembly, the shell has the open inner chamber that sets up in side, places in the PCB board in the inner chamber, place in the PCB board including the plate body of inner chamber, first ware subassembly is installed on the plate body, first ware subassembly is including discharge tube, discharge tube voltage stabilizer and a plurality of piezo-resistor, piezo-resistor is disk form setting, and installs on the plate body, piezo-resistor's the central axis be with plate body parallel arrangement, just piezo-resistor's diameter scope is 18mm-21mm the utility model discloses a small size lightning protection module adopts the components and parts of small volume, has improved the self-destruction of lightning protection module and has broken away from the function to safe and reliable more.

Description

kinds of small volume lightning protection module

Technical Field

The utility model belongs to the surge protector field especially relates to kinds of small size lightning protection modules.

Background

The reasons for the surge (transient pulse) generally include lightning, poor grounding, inductive load switching, power failure removal, and ESD (Electro-Static discharge), and as a result, data loss (or damage) and even equipment damage may occur, wherein the surge caused by lightning is the most destructive.

In a conventional method for preventing damage due to lightning surge, a surge protection device is generally used at the tip of a power adapter of an electric device, and the surge protection device is generally composed of a housing, and a varistor, a discharge tube, an indicator lamp for indicating a protection state, and the like, and is configured to perform a separation function by self-destruction of these components. However, in the conventional surge protection device, the size of the devices such as the piezoresistor is large, which is not beneficial to the miniaturization of the surge protection device, and the energy required for self-destruction of the large-sized devices is large when the large-sized devices are separated, so that the separation function may fail in a power frequency state, the safety performance of the surge protection device is reduced, and a major accident is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide kinds of small size lightning protection modules, it aims at solving current lightning protection module and leads to the not high problem of security because of breaking away from the function not enough

The utility model discloses a kinds of small size lightning protection modules, including shell, PCB board and unit ware subassembly, the shell has side open inner chamber that sets up, places in the PCB board in the inner chamber, the PCB board is including placing in the plate body of inner chamber in, unit ware subassembly is installed on the plate body, unit ware subassembly includes discharge tube, discharge tube voltage stabilizer and a plurality of piezo-resistor, piezo-resistor is disk form setting to install on the plate body, piezo-resistor's the central axis be with plate body parallel arrangement, just piezo-resistor's diameter scope is 18mm-21 mm.

Optionally, the plate body is provided with an th installation through groove, a second installation through groove and a third installation through groove which are sequentially arranged along the length direction;

the discharge tubes are mounted in the second mounting through slots, and the number of the piezoresistors is four, wherein two of the piezoresistors are mounted in the th mounting through slot, and the other two of the piezoresistors are mounted in the third mounting through slot.

Optionally, the arc-shaped bottom of the piezoresistor extends into the -th mounting through groove and the second mounting through groove.

Optionally, the varistor includes a resistor body and two th metal pins, and the th metal pins are respectively attached to the left side surface and the right side surface of the resistor body and extend toward the board body.

Optionally, the discharge tube comprises a tube body and second metal pins respectively connected to two ends of the tube body, and the diameter of the tube body is 8 mm.

Optionally, still be equipped with a plurality of pad holes on the plate body, th metal pin with the second metal pin all wears to establish behind the pad hole with the back welding of plate body, just th metal pin with second metal pin protrusion in the length of the back of plate body is less than or equal to 1.5 mm.

Optionally, the discharge tube voltage stabilizer is disposed above the discharge tube at an interval and is electrically communicated with the discharge tube.

Optionally, the PCB further includes an th pin for connecting to a neutral wire, a second pin for connecting to a live wire, and a third pin for connecting to a ground wire, where the th pin, the second pin, and the third pin are all disposed with the plate and protrude from the housing;

the discharge tube voltage stabilizer is electrically connected with the second pin after being communicated with the discharge tube, part of the piezoresistors are electrically connected with the th pin, and the other part of the piezoresistors are electrically connected with the third pin.

Optionally, an th metal conducting layer is plated on both the upper plate surface and the lower plate surface of the plate body;

the upper surfaces and the lower surfaces of the th pin, the second pin and the third pin are plated with second metal conducting layers;

the th pin, the second pin and the third pin are all provided with through holes, and the inner walls of the through holes are plated with third metal conducting layers;

the PCB realizes circuit conduction through the th metal conducting layer, the second metal conducting layer and the third metal conducting layer which are mutually communicated.

Optionally, the inner cavity is filled with heat-conducting glue, and the heat-conducting glue completely covers the element assembly.

Based on the structural design, because in the lightning protection module, the piezoresistor with the largest volume ratio is vertically installed on the board body of the PCB and is in the shape of a wafer with the diameter of 18-21 mm, compared with the electrophoresis protector of the conventional square sheet piezoresistor with the side length of 34mm, the piezoresistor used by the lightning protection module has smaller volume, so that the miniaturization of the lightning protection module is facilitated, the energy required by self-destruction of a small-volume device is smaller, and under the power frequency state, the self-disengaging function is easily realized without causing major accidents, thereby effectively improving the safety and reliability of the lightning protection module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only the embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lightning protection module according to an embodiment of the present invention;

fig. 2 is an exploded view of a lightning protection module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a PCB board with component assemblies mounted therein in a lightning protection module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a varistor in the lightning protection module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a discharge tube in a lightning protection module according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Outer casing	200	PCB board
110	Plate body	120	th pin
				130	Second pin	140	Third pin
150	Convex strip	310	Discharge tube
				320	Discharge tube stabilizer	330	Voltage dependent resistor
111	th mounting through groove	112	Second installation through groove
				113	Third installation through groove	119	Through hole
300	Component element	118	Pad hole
				331	Resistor body	332	th metal pin
311	Pipe body	312	Second metal pin

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below in with reference to the accompanying drawings and embodiments.

It is noted that when an element is referred to as being "secured to" or "disposed on" another elements, it can be directly on the other elements or indirectly on the other elements when elements are referred to as being "connected to" the other elements, it can be directly connected to the other elements or indirectly connected to the other elements.

It should be noted that the terms of left, right, upper and lower directions in the embodiments of the present invention are only relative concepts or are referred to the normal use state of the product, and should not be considered as limiting.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Thus, a feature defined as "", "second" may explicitly or implicitly include or more of that feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like shall be construed to , for example, as being fixedly connected, detachably connected, or in a body, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, connected between two elements, or interacting between two elements.

The embodiment of the utility model provides an kinds of small size lightning protection modules.

Referring to fig. 1, 2 and 4, the small-volume lightning protection module includes a housing 100, a PCB 200 and an element assembly 300, wherein the housing 100 has an inner cavity with side openings, the PCB 200 is disposed in the inner cavity, the PCB 200 includes a board body 110 disposed in the inner cavity, the element assembly 300 is mounted on the board body 110, the element assembly 300 includes a discharge tube 310, a discharge tube voltage stabilizer 320, and a plurality of piezoresistors 330, the piezoresistors 330 are disposed in a wafer shape and mounted on the board body 110, the central axis of the piezoresistors 330 is parallel to the board body 110, and the diameter of the piezoresistors 330 ranges from 18mm to 21 mm.

Based on the structural design, because in the lightning protection module, the piezoresistor 330 with the largest volume ratio is vertically installed on the board body 110 of the PCB 200 and is in a disc-shaped arrangement with the diameter of 18mm-21mm, compared with the electrophoresis protector which uses the square sheet piezoresistor 330 with the side length of 34mm, the piezoresistor 330 used by the lightning protection module has a smaller volume, so that the lightning protection module is beneficial to miniaturization, the energy required by self-destruction of small-volume devices is smaller, and under a power frequency state, the self-disengaging function is easily realized without causing major accidents, thereby effectively improving the safety and reliability of the lightning protection module.

Referring to fig. 1 to 3, in the embodiment of the present invention, the board body 110 is provided with an th mounting through groove 111, a second mounting through groove 112, and a third mounting through groove 113 sequentially arranged along the length direction, the discharge tube 310 is mounted in the second mounting through groove 112, the number of the piezoresistors 330 is four, two of the piezoresistors 330 are mounted in the th mounting through groove 111, and the other two of the piezoresistors 330 are mounted in the third mounting through groove 113.

Meanwhile, the PCB 200 further includes a pin 120 for connecting a neutral line, a second pin 130 for connecting a live line, and a third pin 140 for connecting a ground line, the pin 120, the second pin 130, and the third pin 140 are all disposed with the body 110 and protrude from the housing 100, the discharge tube voltage stabilizer 320 and the discharge tube 310 are electrically connected to the second pin 130 after being communicated, a portion of the piezoresistors 330 among the piezoresistors 330 is electrically connected to the pin 120, and another portion of the piezoresistors 330 is electrically connected to the third pin 140. specifically, two of the piezoresistors 330 are electrically connected to the pin 120, and another two of the piezoresistors 330 are connected to the third pin 140. it can be understood that, since the pin 120, the second pin 130, and the third pin 140 are all disposed with the body 110 of the PCB 200, in other words, the three pins are the portion of the board of the PCB 200, which can be simultaneously manufactured when the PCB 200 is manufactured, such a larger pin and a special lightning protection module with a smaller volume is not only beneficial to the manufacturing cost of the module and the module is reduced.

Referring to fig. 2 and 3, , in an embodiment of the present invention, the upper and lower surfaces of the board body 110 are plated with a th metal conductive layer, the upper and lower surfaces of the th pins 120, the second pins 130, and the third pins 140 are plated with a second metal conductive layer, the th pins 120, the second pins 130, and the third pins 140 are provided with through holes 119, inner walls of the through holes 119 are plated with a third metal conductive layer, the PCB 200 is electrically connected through the th metal conductive layer, the second metal conductive layer, and the third metal conductive layer that are mutually connected, here, the th metal conductive layer, the second metal conductive layer, and the third metal conductive layer are usually copper-plated layers, the thickness of the copper-plated layers on the three pins is preferably greater than or equal to 72um to ensure good conductive performance, and the structural design of the board body 110 with metal conductive layers on both sides enables both upper and lower board sides of the lightning protection board 200 to be printed with circuits, so that the actual size of the PCB 200 can be greatly reduced, and the volume of the module can be greatly reduced.

, in the embodiment of the present invention, the circular arc bottom of the varistor 330 extends into the mounting through groove 111 and the second mounting through groove 112, so that the space occupation of the varistor 330 in the height direction can be reduced to a certain extent at , which is beneficial to further reducing the volume of the module .

furthermore, as shown in fig. 4, in the embodiment of the present invention, the varistor 330 includes a resistor body 331 and two metal pins 332, the two metal pins 332 are respectively attached to the left side and the right side of the resistor body 331 and extend toward the board body 110. this structure design can make the varistor 330 more compact while ensuring the function unchanged, which is beneficial to reducing the volume of the lightning protection module .

Referring to fig. 5, in the embodiment of the present invention, the discharge tube 310 includes a tube body 311 and second metal pins 312 respectively connecting two ends of the tube body 311, the diameter of the tube body 311 is 8mm, compared to the discharge tube 310 with a diameter of 16mm used in the current common surge protection device on the market, the volume of the discharge tube 310 in this embodiment is smaller, and steps are further performed, in the embodiment of the present invention, a thermal conductive adhesive is filled in the inner cavity, the thermal conductive adhesive completely covers the element assembly 300 to improve the protection performance of the lightning protection module, and the high thermal conductivity of the thermal conductive adhesive is utilized to increase the through-flow capacity of the small-volume component, that is, after the small-volume discharge tube 310 and the varistor 330 are matched with the high thermal conductive adhesive, the related electrical index can be reached.

, as shown in fig. 2 and 3, the discharge tube 320 is disposed above the discharge tube 310 at an interval to achieve the purpose of effectively utilizing space and to reduce the volume of the lightning protection module, wherein the discharge tube 320 is electrically connected to the discharge tube 310 and used in cooperation therewith to increase the Voltage resistance to Voltage, wherein the discharge tube 320 includes a TVS (Transient Voltage Suppressor) and a resistor connected in series, the TVS mainly plays a role of Voltage stabilization, and the resistor protects the TVS by current limiting to increase the Voltage resistance to Voltage.

Please refer to fig. 2, in the embodiment of the present invention, the plurality of pad holes 118 are further disposed on the board body 110, the th metal pins 332 and the second metal pins 312 are welded to the back surface of the board body 110 after penetrating the pad holes 118, and the length of the th metal pins 332 and the second metal pins 312 protruding from the back surface of the board body 110 is less than or equal to 1.5mm, so that not only the rigidity of is maintained, but also the influence on the metal pins due to the electrical stress generated when a large current flows through the metal pins is avoided, and the occurrence of the peak discharge condition when the metal pins protrude too high is avoided.

In addition, this lightning protection module uses discharge tube 310 as the center, there are two piezo-resistor 330 respectively about, form symmetrical Y type circuit structures, when producing the surge between live wire and the zero line or between live wire and the ground wire or between zero line and the ground wire, the resistance at piezo-resistor 330 both ends sharply reduces, the voltage sharply increase at discharge tube 310 both ends reaches the discharge voltage of discharge tube 310, discharge tube 310 switches on, apply in piezo-resistor 330's both ends after the arc voltage after discharge tube 310 switches on is subtracted to the surge voltage, piezo-resistor 330 switches on, just so can effectively restrain and eliminate surge voltage, realize the surge protection of full mode, and this Y type circuit structure is simple, protection sensitivity and reliability are high, can reduce the use amount of components and parts, be favorable to practicing thrift the cost.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1, kinds of small size lightning protection module, its characterized in that includes:

a shell with an inner cavity opened at the side ,

the PCB is arranged in the inner cavity and comprises a plate body arranged in the inner cavity; and the number of the first and second groups,

the element device assembly is arranged on the plate body and comprises a discharge tube, a discharge tube voltage stabilizer and a plurality of piezoresistors, the piezoresistors are arranged in a wafer shape and are arranged on the plate body, the central axis of each piezoresistor is parallel to the plate body, and the diameter range of each piezoresistor is 18-21 mm.

2. The small-volume lightning protection module according to claim 1, wherein the board body is provided with an th installation through groove, a second installation through groove and a third installation through groove which are sequentially arranged along the length direction;

3. The low-volume lightning protection module according to claim 2, wherein the rounded bottom of the varistor extends into the mounting channel and into the second mounting channel.

4. The small volume lightning protection module according to claim 2, wherein the varistor includes a resistor body and two th metal pins, and the two th metal pins are respectively attached to the left side surface and the right side surface of the resistor body and extend toward the board body.

5. The small-volume lightning protection module according to claim 4, wherein the discharge tube includes a tube body having a diameter of 8mm and second metal pins respectively connected to both ends of the tube body.

6. The small-volume lightning protection module according to claim 5, wherein a plurality of pad holes are further formed on the board body, the th metal pin and the second metal pin are welded to the back surface of the board body after penetrating through the pad holes, and the length of the th metal pin and the length of the second metal pin protruding out of the back surface of the board body are less than or equal to 1.5 mm.

7. The small-volume lightning protection module according to claim 5, wherein the discharge tube stabilizer is spaced above the discharge tube and is in electrical communication with the discharge tube.

8. The low-volume lightning protection module according to claim 1, wherein the PCB further comprises an th pin for connecting to a neutral wire, a second pin for connecting to a live wire, and a third pin for connecting to a ground wire, the th pin, the second pin, and the third pin are disposed with the body and protrude from the housing;

9. The small volume lightning protection module according to claim 8, wherein the upper and lower board surfaces of the board body are plated with th metal conductive layers;

10. A low-volume lightning protection module according to any of claims 1 to 9, wherein the inner cavity is potted with a thermally conductive glue, the thermally conductive glue completely covering the element assembly.