CN213072110U - Pressure-sensitive module and surge protector - Google Patents

Abstract

The utility model provides a voltage-sensitive module and surge protector, which comprises a shell, a support frame, a voltage-sensitive resistor, a discharge tube, a first electrode and a second electrode, wherein the support frame is arranged in the shell, the voltage-sensitive resistor is arranged on the support frame, and the first electrode and the second electrode both extend out of the shell; the support frame is provided with a placing groove, the discharge tube is arranged in the placing groove, and the piezoresistor is arranged outside the placing groove; the piezoresistor is provided with a first conductive terminal and a second conductive terminal; the discharge tube is provided with a first pin and a second pin, the first pin is in conductive connection with the first conductive terminal, and the second pin is in conductive connection with the first electrode; a second conductive terminal is fusably connected to the second electrode. The utility model provides a pressure-sensitive module and surge protector can be directly through the automation equipment will discharge in the pipe standing groove of impressing, needn't manually will discharge in putting into the standing groove, has saved the time of installing discharge pipe, has improved the packaging efficiency.

Description

Pressure-sensitive module and surge protector

Technical Field

The utility model belongs to the technical field of the overvoltage protection, more specifically say, relate to a pressure-sensitive module and surge protector.

Background

Over-voltage caused by lightning strike induction, capacitive load switching on, inductive load switching off and the like is often encountered in power systems, and the over-voltage can cause damage to electric equipment. Surge Protection Devices (SPDs), commonly known as lightning protectors, are usually connected in parallel with electrical equipment in a circuit, and the voltage sensitive characteristics of the SPDs are used to protect the electrical equipment from various overvoltage damages, especially expensive, precise and uninterruptable electrical equipment, such as communication base station rooms, financial systems, stock exchange systems, high-value electrical equipment and other electrical related equipment and systems, and the surge protection devices are used to protect the equipment and systems from transient overvoltage caused by lightning or other reasons.

The pressure-sensitive module is a core structure of the surge protector, acts on the micro switch to enable the micro switch to keep or switch the state, and therefore information whether the surge protector breaks down or not is transmitted to a user. The voltage-sensitive module in the prior art comprises a support frame, a voltage-sensitive resistor and a discharge tube, wherein a placing groove is arranged on the support frame, elastic parts are arranged at two ends of the placing groove, the discharge tube is clamped between the elastic parts at two ends of the placing groove, the voltage-sensitive resistor is in conductive connection with the elastic parts, and the elastic parts have conductivity and are in conductive connection with the discharge tube; when assembling the pressure-sensitive module, the discharge tube or the elastic member needs to be manually pressed into the placing groove, so that the assembling efficiency of the pressure-sensitive module is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure-sensitive module and surge protector to solve the technical problem that the pressure-sensitive module packaging efficiency that exists is low among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme: providing a pressure-sensitive module, which comprises a shell, a support frame, a pressure-sensitive resistor, a discharge tube, a first electrode and a second electrode, wherein the support frame is arranged in the shell, the pressure-sensitive resistor is arranged on the support frame, and the first electrode and the second electrode both extend out of the shell;

the support frame is provided with a placing groove, the discharge tube is arranged in the placing groove, and the piezoresistor is arranged outside the placing groove;

the piezoresistor is provided with a first conductive terminal and a second conductive terminal;

a first pin and a second pin are arranged on the discharge tube, the first pin is in conductive connection with the first conductive terminal, and the second pin is in conductive connection with the first electrode;

the second conductive terminal is fusably connected with the second electrode.

Furthermore, the device also comprises a first conducting strip in conductive connection with the first conducting terminal, and the first pin is in conductive connection with the first conducting strip.

Furthermore, a connecting groove is formed in the first conducting strip, and the first pin is welded in the connecting groove.

Furthermore, a fixing groove is formed in the support frame, and the first conducting strip is arranged in the fixing groove.

Further, the discharge tube is provided at an end of the placement groove close to the first conductive sheet.

Further, the display device also comprises a second conducting strip which is in conducting connection with the second electrode;

the side surface of the support frame is provided with a communication hole, and the connecting end of the second conducting strip and the second conducting terminal are respectively arranged at two sides of the support frame;

the second conducting sheet or/and the second conducting terminal extend into the communication hole so that the second conducting sheet and the second conducting terminal can be connected in a fusing mode.

Furthermore, the device also comprises a spring and a rotating sheet which is rotatably arranged on the supporting frame;

the spring is respectively connected with the rotating sheet and the supporting frame;

the rotating sheet is abutted against the second conducting sheet and the fusible position of the second electrode under the action of the elastic force of the spring.

Furthermore, the shell is provided with an observation hole, the rotating sheet is provided with a mark area, and the mark area is provided with at least two different colors;

when the spring drives the rotating sheet to rotate, the color change of the identification area can be checked through the observation hole.

Furthermore, the first electrode and the second electrode are clamped on the support frame.

The utility model also provides a surge protector, including the pressure-sensitive module that any one of the above-mentioned technical scheme mentioned.

The utility model provides a pressure-sensitive module and surge protector's beneficial effect lies in: compared with the prior art, the shell of the pressure-sensitive module can protect the support frame, the piezoresistor and the discharge tube, and the service life of the pressure-sensitive module is prolonged; the support frame has the functions of supporting and positioning the piezoresistor and the discharge tube, so that the positions of the piezoresistor and the discharge tube are relatively fixed, and the short circuit of a circuit caused by the position change of the piezoresistor and the discharge tube is avoided; the first electrode and the second electrode extend out of the shell and are used for being inserted into an external circuit; the placing groove on the supporting frame is used for accommodating the discharge tube, so that the voltage-sensitive module is more compact, and meanwhile, the piezoresistor is arranged outside the placing groove, so that the wall of the placing groove can isolate the piezoresistor from the discharge tube, and the short circuit of the voltage-sensitive module is avoided; when the discharge tube is installed, the discharge tube can be directly pressed into the placing groove through the automatic equipment, then the first pin of the discharge tube is in conductive connection with the first conductive terminal of the piezoresistor, the discharge tube does not need to be manually placed into the placing groove, the time for installing the discharge tube is saved, and the assembly efficiency of the piezoresistor module is improved; the second conductive terminal and the second electrode of the piezoresistor are connected in a fusible manner, and when the circuit is in overvoltage, the second conductive terminal and the second electrode are fused so as to send fault information of the piezomodule to a user, remind the user of timely processing, enable the piezoresistor to be separated from a power grid and avoid ignition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a pressure-sensitive module according to an embodiment of the present invention;

fig. 2 is a schematic partial structural diagram of a pressure-sensitive module according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a partial structure of a pressure-sensitive module according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure of the piezoresistor in FIG. 2;

fig. 5 is a schematic structural view of the supporting frame in fig. 2.

Wherein, in the figures, the respective reference numerals:

1. a housing; 11. an observation hole; 2. a support frame; 21. a placement groove; 22. fixing grooves; 23. a communicating hole; 3. a voltage dependent resistor; 31. a first conductive terminal; 32. a second conductive terminal; 4. a discharge tube; 41. a first pin; 42. a second pin; 5. a first electrode; 6. a second electrode; 7. a first conductive sheet; 71. connecting grooves; 8. a second conductive sheet; 9. a spring; 10. a rotating sheet; 101. the region is identified.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, fig. 2 and fig. 4, the pressure-sensitive module provided by the present invention will now be described. The pressure-sensitive module comprises a shell 1, a support frame 2, a pressure-sensitive resistor 3, a discharge tube 4, a first electrode 5 and a second electrode 6, wherein the support frame 2 is arranged in the shell 1, the pressure-sensitive resistor 3 is arranged on the support frame 2, and the first electrode 5 and the second electrode 6 both extend out of the shell 1;

the support frame 2 is provided with a placing groove 21, the discharge tube 4 is arranged in the placing groove 21, and the piezoresistor 3 is arranged outside the placing groove 21;

the piezoresistor 3 is provided with a first conductive terminal 31 and a second conductive terminal 32;

a first pin 41 and a second pin 42 are arranged on the discharge tube 4, the first pin 41 is in conductive connection with the first conductive terminal 31, and the second pin 42 is in conductive connection with the first electrode 5;

the second conductive terminal 32 is fusably connected to the second electrode 6.

Compared with the prior art, the pressure-sensitive module provided by the utility model has the advantages that the shell 1 can protect the support frame 2, the piezoresistor 3 and the discharge tube 4, and the service life of the pressure-sensitive module is prolonged; the support frame 2 has the functions of supporting and positioning the piezoresistor 3 and the discharge tube 4, so that the positions of the piezoresistor 3 and the discharge tube 4 are relatively fixed, and the circuit short circuit caused by the position change of the piezoresistor 3 and the discharge tube 4 is avoided; the first electrode 5 and the second electrode 6 extend out of the shell 1 and are used for being plugged in an external circuit; the placing groove 21 on the support frame 2 is used for accommodating the discharge tube 4, so that the voltage-sensitive module is more compact, and meanwhile, the piezoresistor 3 is arranged outside the placing groove 21, so that the wall of the placing groove 21 can isolate the piezoresistor 3 from the discharge tube 4, and the short circuit of the voltage-sensitive module is avoided; when the discharge tube 4 is installed, the discharge tube 4 can be directly pressed into the placing groove 21 through automatic equipment, then the first pin 41 of the discharge tube 4 is in conductive connection with the first conductive terminal 31 of the piezoresistor 3, the discharge tube 4 does not need to be manually placed into the placing groove 21, an elastic part does not need to be pressed into the placing groove 21, the time for installing the discharge tube 4 is saved, and the assembly efficiency of the pressure-sensitive module is improved; the second conductive terminal 32 of the piezoresistor 3 is connected with the second electrode 6 in a fusible manner, and when the circuit is in overvoltage, the second conductive terminal 32 and the second electrode 6 are fused, so that fault information of the piezoresistor module is sent to a user, the user is reminded of processing in time, and meanwhile, the piezoresistor 3 is separated from a power grid to avoid ignition.

Optionally, the second conductive terminal 32 and the second electrode 6 are connected by low temperature solder.

Further, please refer to fig. 2, as a specific implementation manner of the pressure-sensitive module provided by the present invention, the pressure-sensitive module further includes a first conductive plate 7 conductively connected to the first conductive terminal 31, the first pin 41 is conductively connected to the first conductive plate 7, the first conductive plate 7 can extend the circuit from the position of the first conductive terminal 31 to the position of the first pin 41, so as to facilitate the conductive connection between the first pin 41 and the first conductive terminal 31 through the first conductive plate 7.

Further, please refer to fig. 2, as a specific embodiment of the pressure-sensitive module provided by the present invention, the first conductive plate 7 is provided with the connecting groove 71, the first pin 41 is welded in the connecting groove 71, the inner groove wall of the connecting groove 71 can limit the first pin 41, so as to avoid that the displacement of the first pin 41 is too large when the first pin 41 is welded, which affects the welding of the first pin 41, and the connecting groove 71 can accommodate the first pin 41, thereby avoiding the connection position between the first pin 41 and the first conductive plate 7 from being collided, which results in the disconnection between the first pin 41 and the first conductive plate 7.

Further, please refer to fig. 2, as a specific embodiment of the pressure-sensitive module provided by the present invention, the supporting frame 2 is provided with a fixing slot 22, the first conductive plate 7 is disposed in the fixing slot 22, the fixing slot 22 is used for accommodating the first conductive plate 7, and the deformation of the first conductive plate 7 is avoided, so that the conductive connection between the first conductive plate 7 and the first pin 41 is more stable, the slot wall of the fixing slot 22 further has the effect of the first conductive plate 7, and the movement of the first conductive plate 7 is avoided to improve the safety performance of the pressure-sensitive module.

Further, please refer to fig. 2, as a specific embodiment of the pressure-sensitive module provided by the present invention, the discharge tube 4 is disposed at one end of the placing groove 21 close to the first conductive sheet 7, so as to place the first pin 41 into the connecting groove 71, thereby welding the first conductive sheet 7 and the first pin 41, and further shortening the length of the first pin 41, reducing the risk of short circuit, and the placing groove 21 can also reduce the weight of the supporting frame 2.

Further, referring to fig. 3 to 5, as a specific embodiment of the pressure-sensitive module provided by the present invention, the pressure-sensitive module further includes a second conductive sheet 8 electrically connected to the second electrode 6;

the side surface of the support frame 2 is provided with a communication hole 23, and the connecting end of the second conducting strip 8 and the second conducting terminal 32 are respectively arranged at two sides of the support frame 2;

at least one of the second conductive sheet 8 and the second conductive terminal 32 extends into the communication hole 23 so that the second conductive sheet 8 and the second conductive terminal 32 can be connected in a fusible manner, the second conductive sheet 8 can extend the circuit from the second conductive terminal 32 to the second electrode 6 so that the second conductive terminal 32 is connected with the second electrode 6 in a conductive manner through the second conductive sheet 8, and when the voltage in the circuit is too high, the connection between the second conductive sheet 8 and the second conductive terminal 32 is fused so as to send fault information of the pressure-sensitive module to a user; the other positions of the piezoresistor 3 except the second conductive terminal 32 can be isolated from the second conductive sheet 8 by the support frame 2, so that the second conductive sheet 8 is prevented from being conductive with the other positions of the piezoresistor 3 except the first conductive terminal 31, the piezomodule is prevented from being damaged, and the safety and the stability of the piezomodule are improved.

Specifically, the second conductive sheet 8 and the second conductive terminal 32 are soldered by a soldering tin.

Further, please refer to fig. 3, which is a specific embodiment of the pressure-sensitive module provided by the present invention, further comprising a spring 9 and a rotating piece 10 rotatably disposed on the supporting frame 2;

the spring 9 is respectively connected with the rotating sheet 10 and the supporting frame 2;

the rotating plate 10 is abutted against the fusible positions of the second conducting plate 8 and the second electrode 6 under the elastic force of the spring 9, when a larger voltage passes through the voltage-sensitive module, the piezoresistor 3 absorbs redundant current, so that the temperature of the connecting position between the second conducting plate 8 and the second conducting terminal 32 is increased until the second conducting plate is melted, because the rotating plate 10 is abutted against the fusible positions of the second conducting plate 8 and the second conducting terminal 32 under the elastic force of the spring 9, and the connecting position between the second conducting plate 8 and the second conducting terminal 32 for preventing the rotating plate 10 from rotating is melted again, the spring 9 can drive the rotating plate 10 to rotate, so as to accelerate the disconnection between the second conducting plate 8 and the second conducting terminal 32, block the communicating hole 23, physically isolate the second conducting plate 8 from the second conducting terminal 32, thus playing roles of arc extinction and increasing creepage distance, and thoroughly preventing the second conducting plate 8 from being conductively communicated with the second conducting terminal 32, thereby improving the sensitivity and safety of the pressure sensitive module.

Further, referring to fig. 1 and fig. 3, as a specific embodiment of the pressure-sensitive module provided by the present invention, the housing 1 is provided with an observation hole 11, the rotating sheet 10 is provided with a mark area 101, and the mark area 101 is provided with at least two different colors;

when the spring 9 drives the rotating sheet 10 to rotate, the color change of the identification area 101 can be checked through the observation hole 11, if a user can see the color of the mark on the identification area 101 which is not fused through the observation hole 11, the second conducting sheet 8 and the second conducting terminal 32 are not fused, and the pressure-sensitive module can be used normally; if the user sees that the mark on the identification area 101 is in the fusing color, it indicates that the second conductive plate 8 and the second conductive terminal 32 are fused, so that the spring 9 drives the rotating plate 10 to rotate, and the color on the identification area 101 changes, and at this time, the pressure-sensitive module needs to be replaced; therefore, the observation hole 11 is arranged on the shell 1, and the identification area 101 is arranged on the rotating sheet 10, so that the use condition of the pressure-sensitive module can be informed to the user in time, and the user is reminded to replace the pressure-sensitive module in time.

Specifically, green indicates that the second conductive plate 8 and the second conductive terminal 32 are not blown, and red indicates that the second conductive plate 8 and the second conductive terminal 32 are blown.

Further, please refer to fig. 2, as a specific embodiment of the pressure-sensitive module provided by the present invention, the first electrode 5 and the second electrode 6 are both clamped on the supporting frame 2, so as to reduce the installation time of the first electrode 5 and the second electrode 6, and improve the assembly efficiency of the first electrode 5 and the second electrode 6.

The utility model also provides a surge protector, surge protector include the pressure-sensitive module that any above-mentioned embodiment was mentioned.

The utility model provides a surge protector compares with prior art, discharge tube 4 can directly impress in the standing groove 21, then with the first pin 41 of discharge tube 4 and the electrically conductive terminal 31 of piezo-resistor 3 electrically conductive connection, has saved the equipment time of discharge tube 4 to surge protector's packaging efficiency has been improved, the reliability that first pin 41 and first electrically conductive terminal 31 are connected has been improved.

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 modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Pressure-sensitive module, including casing, support frame, piezo-resistor and discharge tube, the support frame is located in the casing, piezo-resistor locates on the support frame, its characterized in that: the first electrode and the second electrode both extend out of the shell;

the support frame is provided with a placing groove, the discharge tube is arranged in the placing groove, and the piezoresistor is arranged outside the placing groove;

the piezoresistor is provided with a first conductive terminal and a second conductive terminal;

a first pin and a second pin are arranged on the discharge tube, the first pin is in conductive connection with the first conductive terminal, and the second pin is in conductive connection with the first electrode;

the second conductive terminal is fusably connected with the second electrode.

2. The pressure sensitive module of claim 1, wherein: the first pin is in conductive connection with the first conductive sheet.

3. The pressure sensitive module of claim 2, wherein: the first conducting strip is provided with a connecting groove, and the first pin is welded in the connecting groove.

4. The pressure sensitive module of claim 3, wherein: the support frame is provided with a fixed groove, and the first conducting strip is arranged in the fixed groove.

5. The pressure sensitive module of claim 3, wherein: the discharge tube is arranged at one end of the placing groove close to the first conducting strip.

6. The pressure sensitive module of claim 1, wherein: the second conductive sheet is conductively connected with the second electrode;

the side surface of the support frame is provided with a communication hole, and the connecting end of the second conducting strip and the second conducting terminal are respectively arranged at two sides of the support frame;

the second conducting sheet or/and the second conducting terminal extend into the communication hole so that the second conducting sheet and the second conducting terminal can be connected in a fusing mode.

7. The pressure sensitive module of claim 6, wherein: the spring and the rotating sheet are rotatably arranged on the supporting frame;

the spring is respectively connected with the rotating sheet and the supporting frame;

the rotating sheet is abutted against the second conducting sheet and the fusible position of the second electrode under the action of the elastic force of the spring.

8. The pressure sensitive module of claim 7, wherein: the shell is provided with an observation hole, the rotating sheet is provided with a mark area, and the mark area is provided with at least two different colors;

when the spring drives the rotating sheet to rotate, the color change of the identification area can be checked through the observation hole.

9. The pressure sensitive module of claim 1, wherein: the first electrode and the second electrode are clamped on the support frame.

10. Surge protector, its characterized in that: comprising a pressure sensitive module according to any of claims 1-9.

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