CN214479590U - Surge protector - Google Patents

Abstract

The application discloses a surge protector, which comprises an outer shell and a piezoresistor arranged in the outer shell, wherein the input end of the piezoresistor is connected with a first contact embedded in the outer shell, the output end of the piezoresistor is electrically connected with a second contact embedded in the outer shell through a release, the release is rotatably sleeved on a shaft pin fixedly connected with the outer shell, and a torsional spring for driving the release to realize release action is further sleeved on the shaft pin; the outer shell is installed on the base through a first contact and a second contact in a plugging mode, a first indicating unit used for displaying the working state of the piezoresistor is arranged on the base, and the first indicating unit is controlled by a trigger switch which is abutted to the installation of one end of the tripper. The utility model provides a surge protector has carried out brand-new design to dropout structure, has advantages such as simple structure, compactness, occupation space are little.

Description

Surge protector

Technical Field

The utility model relates to a circuit protection device technical field especially relates to surge protection device is prevented in the lightning protection, concretely relates to surge protector.

Background

A surge protector, also called a lightning protector, is an electronic device for providing safety protection for various electronic equipment, instruments and meters and communication lines. When the peak current or the voltage is suddenly generated in the electric loop or the communication line due to the external interference, the surge protector can conduct and shunt in a very short time, so that the damage of the surge to other equipment in the loop is avoided.

The surge protector is one of necessary protection devices on a plurality of existing important circuits, but a zinc oxide piezoresistor which is one of necessary elements in the protector can generate heat due to self cracking under the action of long-term current or under the impact of high voltage and large current for many times, so that abnormal conditions such as failure or ignition occur, and a tripping mechanism is required to be arranged to disconnect the zinc oxide piezoresistor from the circuit, so that the adverse effect caused by the surge protector is avoided. There are many existing tripping mechanisms, and the design and stability of the mechanism adopted by the tripping mechanism are different.

SUMMERY OF THE UTILITY MODEL

In order to improve surge protector's dropout stability and reliability, this application provides a surge protector, the utility model provides a surge protector has carried out brand-new design to dropout structure, has advantages such as simple structure, compactness, occupation space are little. Meanwhile, an indicating unit for indicating the working state of the protector is designed, and electronic indication and mechanical indication modes are respectively adopted for double display, so that the reliability of state indication is improved.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

a surge protector comprises an outer shell and a piezoresistor arranged in the outer shell, wherein the input end of the piezoresistor is connected with a first contact embedded in the outer shell, the output end of the piezoresistor is electrically connected with a second contact embedded in the outer shell through a release, the release is rotatably sleeved on a shaft pin fixedly connected with the outer shell, and a torsional spring for driving the release to realize release action is further sleeved on the shaft pin; the outer shell is installed on the base through a first contact and a second contact in a plugging mode, a first indicating unit used for displaying the working state of the piezoresistor is arranged on the base, and the first indicating unit is controlled by a trigger switch which is abutted to the installation of one end of the tripper. The tripper is a key structural part for connecting or disconnecting the piezoresistor and the second contact, the tripping principle is realized by utilizing mechanical balance, and specifically, one end of the tripper is fixedly connected with the output end of the piezoresistor by the prior art, such as the prior low-temperature soldering technology; meanwhile, the elasticity applied to the tripper by the torsional spring forms a pair of balance force, after the voltage dependent resistor is cracked and heated due to current impact, the connection strength between the voltage dependent resistor and the tripper is gradually reduced along with the rise of the temperature until the elasticity applied by the torsional spring cannot be balanced, the tripper is separated from the connection with the voltage dependent resistor instantly, the disconnection between the voltage dependent resistor and a circuit is realized, and the phenomenon that the temperature of the voltage dependent resistor is overhigh and the ignition is caused due to continuous current impact is avoided. It is worth to be noted that the elastic force provided by the torsion spring and the soldering strength can be adjusted according to the actual tripping temperature. For example, the larger the elasticity provided by the torsion spring is, the higher the soldering connection strength which needs to be balanced with the torsion spring is, and after the temperature rises, the higher the heat quantity for breaking the soldering is needed, and the sensitivity of tripping is reduced; vice versa, the skilled person can adjust it according to the actual situation. The first indicating unit can adopt a light emitting diode in the prior art to indicate, for example, when the release is in a normal connection state, the release abuts against the trigger switch, so that the light emitting diode is in a path lighting state, which represents normal operation; if the tripper is in the tripping state, the trigger switch bounces due to tripping of the tripper, the first indicating unit is in the open circuit state, the light-emitting diode is extinguished, the surge protector is in the open circuit state at the moment, and maintenance personnel are reminded of replacing the first indicating unit in time.

For the stability of further promotion surge protector operating condition instruction, preferably, still including setting up second indicating unit in the shell, second indicating unit is including setting up bar cavity in the shell, install the instruction band in the bar cavity, any pot head of instruction band is established the dropout free end of release, the other end of instruction band is close to and is provided with the typewriter ribbon on shell body one side, the shell body with the typewriter ribbon corresponds the position and is provided with transparent or fretwork observation window. The second indicating unit is completely designed by adopting a mechanical structure, does not depend on any electrical appliance element, can avoid the problem of state indicating distortion caused by circuit faults, and plays a role in double indicating verification so as to avoid the phenomenon that maintenance personnel misjudge the working state of the surge protector due to the faults of the first indicating unit. Of course, in order to improve the stability of the first indication unit, the first indication unit may be formed by modules as simple as possible in the prior art, such as only a buck-regulator module, a rectifier-filter module, a low-power-consumption light emitting diode, and a trigger switch. The second indicating unit can only see the indicator tape through the observation window under normal operating condition, and after the release was tripped because of piezo-resistor is overheated, the typewriter ribbon took place to remove under the release drives, and the typewriter ribbon can be seen just to the observation window corresponding position this moment, through the operating condition of distinguishing instruction surge protector of colour, if the indicator tape is green, the typewriter ribbon is red, sees that the colour represents normal work when the colour is green when the observation window, then represents the tripping circuit break when being red.

Preferably, the outer shell comprises a first shell and a second shell which are detachably connected with each other, and the strip-shaped cavity is formed between the inner side wall of the second shell and the piezoresistor.

Preferably, a third avoiding hole is formed in the position, close to the end head, of the ribbon, and the ribbon is sleeved on the tripping free end of the tripper through the third avoiding hole. Mode through the physics cover is established can the at utmost guarantee reliability, and avoids adopting the connection that other connected modes lead to drop etc. in the structural setting, should ensure that the width of the dropout free end of release is greater than the width in hole is dodged to the third, avoids appearing the slippage probably.

Preferably, the release comprises an integrally formed body, the body comprises a straight portion for abutting against the trigger switch, a first avoidance hole arranged near the straight portion, and at least one terminal fixedly connected with the body, and the terminal is connected with the second contact through a wire; the body is further provided with a second avoiding hole, the output end of the tripper is fixedly connected with a third contact, and the third contact penetrates through the tripper through the second avoiding hole and is welded through low-temperature tin soldering.

Preferably, the bottom of the outer shell is provided with an anti-misplug mechanism, and the base is provided with a unique accommodating groove matched with the anti-misplug mechanism. The trip unit comprises a trip unit body, a wiring terminal and a control unit, wherein the trip unit body is made of insulator materials, the wiring terminal is made of conductors, and the wiring terminal is a copper sheet embedded in the trip unit body.

Advantageous effects

The utility model provides a surge protector simple structure, the design is compact, and the reliability is high, still has two indicating unit simultaneously in order to show the operating condition that surge protector located, and the suggestion dimension personnel that can be timely, accurate change.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is an isometric view of the outer structure of the present application;

FIG. 2 is another visual isometric view of FIG. 1;

FIG. 3 is a view of the internal structure of the present application;

FIG. 4 is another view of the structure of FIG. 3;

FIG. 5 is another visual block diagram of FIG. 4;

FIG. 6 is a block diagram of the hidden enclosure of the present application;

fig. 7 is another visual structural diagram of fig. 6.

In the figure: 1-a first housing; 2-a second housing; 21-an observation window; 3-a first contact; 4-a second contact; 5-misplug prevention mechanism; 6-torsion spring; 7-a voltage dependent resistor; 8-a release; 9-axle pin; 10-a third contact; 11-an indicator tape; 111-a third avoidance hole; 112-a ribbon; 81-straight portion; 82-a first avoidance hole; 83-terminal; 84-a dropout; 85-second relief hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the surge protector shown in fig. 1-5 in the attached description includes an outer shell, and a varistor 7 installed in the outer shell, where an input end of the varistor 7 is connected to a first contact 3 embedded in the outer shell, an output end of the varistor 7 is electrically connected to a second contact 4 embedded in the outer shell through a release 8, the release 8 is rotatably sleeved on a shaft pin 9 fixedly connected to the outer shell, and the shaft pin 9 is further sleeved with a torsion spring 6 for driving the release 8 to perform a releasing action; still include the base, the shell body is installed through first contact 3 and second contact 4 plug on the base, have the first indicating unit who is used for showing piezo-resistor 7 operating condition on the base, first indicating unit through with 8 one end of tripper support the trigger switch control of installation. The release 8 is a key structural part for connecting or disconnecting the piezoresistor 7 and the second contact 4, and the release principle is realized by utilizing mechanical balance, specifically, one end of the release 8 is fixedly connected with the output end of the piezoresistor 7 by the prior art, such as the prior low-temperature soldering technology; meanwhile, a pair of balance forces are formed by utilizing the elasticity applied by the torsion spring 6 to the tripper 8, after the voltage dependent resistor 7 is cracked and heated due to current impact, the connection strength between the voltage dependent resistor 7 and the tripper 8 is gradually reduced along with the rise of the temperature until the elasticity applied by the torsion spring 6 cannot be balanced, the tripper 8 is separated from the connection with the voltage dependent resistor 7 instantly, the disconnection between the voltage dependent resistor 7 and a circuit is realized, and the phenomenon that the voltage dependent resistor 7 is over-high in temperature and is ignited due to continuous current impact is avoided. It should be noted that the magnitude of the elastic force provided by the torsion spring 6 and the soldering strength can be adjusted according to the actual tripping temperature. For example, the larger the elasticity provided by the torsion spring 6 is, the higher the soldering connection strength which needs to be balanced with the torsion spring is, and after the temperature rises, the higher the heat quantity for breaking the soldering is needed, and the sensitivity of tripping is reduced; vice versa, the skilled person can adjust it according to the actual situation. The first indicating unit can adopt a light emitting diode in the prior art to indicate, for example, when the release 8 is in a normal connection state, the release 8 abuts against the trigger switch, so that the light emitting diode is in a path lighting state, which represents normal operation; if the tripper 8 is in the tripping state, the trigger switch bounces due to the tripping of the tripper 8, the first indicating unit is in the open circuit state, the light-emitting diode is extinguished, the surge protector is in the open circuit state at the moment, and maintenance personnel are reminded to replace the surge protector in time.

It should be noted that the embodiment has disclosed a tripping mechanism based on the lever principle in detail, and tripping is implemented by breaking the force balance of the lever through temperature change. As those skilled in the art can appreciate from the disclosure of the present embodiment and the following preferred embodiments, technical suggestions can be obtained based on the basic principles provided by the present application and by including technical solutions that are modified on structural components to obtain equivalent or similar technical effects. Given this background and teachings, it should be appreciated that those skilled in the art, upon attaining an understanding of the present disclosure, may not be exhaustive of the embodiments, which may be embodied based on the same or similar principles, but may be embodied with a limited number of preferred embodiments.

Example 2:

for further stability of promoting surge protector operating condition and instructing, this embodiment is optimized on embodiment 1 basis, specifically further combine specification fig. 6 and fig. 7 to show, still including setting up second indicating unit in the shell, second indicating unit is including setting up bar cavity in the shell, install instruction area 11 in the bar cavity, any pot head of instruction area 11 is established the dropout free end of tripper 8, be provided with typewriter ribbon 112 on the other end of instruction area 11 is close to shell one side, the shell with typewriter ribbon 112 corresponding position is provided with transparent or fretwork observation window 21. The second indicating unit is completely designed by adopting a mechanical structure, does not depend on any electrical appliance element, can avoid the problem of state indicating distortion caused by circuit faults, and plays a role in double indicating verification so as to avoid the phenomenon that maintenance personnel misjudge the working state of the surge protector due to the faults of the first indicating unit. Of course, in order to improve the stability of the first indication unit, the first indication unit may be formed by modules as simple as possible in the prior art, such as only a buck-regulator module, a rectifier-filter module, a low-power-consumption light emitting diode, and a trigger switch. The second indicating unit can only see the indicating band 11 through the observation window 21 under normal operating condition, and after release 8 because of piezoresistor 7 overheated tripping, colour bar 112 takes place to remove under release 8 drives, and colour bar 112 can just be seen to the corresponding position of observation window 21 this moment, indicates surge protector's operating condition through the differentiation of colour, if indicating band 11 is green, colour bar 112 is red, represents normal work when the observation window sees that the colour is green, then represents tripping circuit break when being red.

In this embodiment, the outer casing includes first casing 1 and second casing 2 that can dismantle the connection each other, form between the inside wall of second casing 2 and piezo-resistor 7 the bar cavity. The ribbon 112 is provided with a third avoiding hole 111 at a position close to the end, and the ribbon 112 is sleeved on the tripping free end of the tripper 8 through the third avoiding hole 111. Mode of establishing through the physics cover can be maximum assurance reliability, and avoid adopting the connection that other connected modes lead to drop etc. in the structural setting, should ensure that the width of the dropout free end of tripper 8 is greater than the width of hole 111 is dodged to the third, avoids appearing the slippage probably. The release 8 comprises an integrally formed body, the body comprises a straight portion 81 for abutting against the trigger switch, a first avoidance hole 82 arranged near the straight portion 81, and at least one terminal 83 fixedly connected with the body, and the terminal 83 is connected with the second contact 4 through a wire; the body is further provided with a second avoiding hole 85, the output end of the tripper 8 is fixedly connected with a third contact 10, and the third contact 10 penetrates through the tripper 8 through the second avoiding hole 85 and is welded through low-temperature soldering.

In a normal use state, the straight portion 81 of the trip unit 8 abuts against the trigger switch, so that the trigger switch is always in a compressed state, and thus the light emitting diode in the first indicating unit is in a lighting state, which indicates that the surge protector is in a normal working state. When the temperature of the piezoresistor 7 rises, the temperature is quickly transferred to the third contact 10, so that the low-temperature tin soldering loses the bonding capability, and the release 8 is released under the action of the torsion spring 6. Straight portion 81 loses propping to trigger switch behind the dropout, and trigger switch bounces for first indicating unit opens circuit, and emitting diode extinguishes, instructs the surge protector at this moment to be in the dropout state, in order to reach the mesh that the suggestion dimension guarantor in time changed. In the actual use process, because surge protector is installed in a concentrated manner, maintenance personnel can lock the surge protector with a fault instantly by visual observation, and then further determine whether the surge protector is actually in the fault state or not by looking up the indication color of the observation window 21 on the second indication unit. Therefore, the problem of false alarm caused by the fault of the second indicating unit can be effectively avoided, which is not possessed by the existing surge protector. The shell body bottom is provided with prevents mistake and inserts mechanism 5, have only on the base with prevent mistake and insert the holding tank that mechanism 5 suited. The main body of the tripper 8 is made of an insulator material, the terminal 83 is made of a conductor, and the terminal 83 is a copper sheet embedded in the main body of the tripper 8. The main structure part of the release 8 is made of insulating materials, so that the leakage current can be avoided as much as possible, and the normal surge leakage current can not be influenced, thereby having better safety.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A surge protector, includes the shell body, installs piezo-resistor (7) in the shell body, piezo-resistor (7) input is connected with imbeds first contact (3) in the shell body, its characterized in that: the output end of the piezoresistor (7) is electrically connected with a second contact (4) embedded in the outer shell through a release (8), the release (8) is rotatably sleeved on a shaft pin (9) fixedly connected with the outer shell, and a torsion spring (6) for driving the release (8) to realize release action is further sleeved on the shaft pin (9); the improved voltage-sensitive switch is characterized by further comprising a base, the outer shell is installed on the base through a first contact (3) and a second contact (4) in a plugging mode, a first indicating unit used for displaying the working state of the piezoresistor (7) is arranged on the base, and the first indicating unit is controlled by a trigger switch which is abutted to one end of the tripper (8) in an installing mode.

2. A surge protector according to claim 1, wherein: still including setting up second indicating unit in the shell body, second indicating unit is including setting up bar cavity in the shell body, install instruction area (11) in the bar cavity, the arbitrary pot head of instruction area (11) is established the dropout free end of release (8), the other end of instruction area (11) is close to and is provided with typewriter ribbon (112) on shell body one side, the shell body with typewriter ribbon (112) correspond the position and are provided with transparent or fretwork observation window (21).

3. A surge protector according to claim 2, wherein: the outer casing includes first casing (1) and second casing (2) of mutual detachable connection, the inside wall of second casing (2) with form between piezo-resistor (7) the bar cavity.

4. A surge protector according to claim 3, wherein: the position that typewriter ribbon (112) is close to the end has third dodge hole (111), typewriter ribbon (112) are passed through third dodge hole (111) cover is established on the dropout free end of tripper (8).

5. A surge protector according to any of claims 1-4, wherein: the release (8) comprises an integrally formed body, the body comprises a straight part (81) for abutting against the trigger switch, a first avoidance hole (82) arranged close to the straight part (81), and at least one wiring terminal (83) fixedly connected with the body, and the wiring terminal (83) is connected with the second contact (4) through a conducting wire;

the body is further provided with a second avoiding hole (85), the output end of the tripper (8) is fixedly connected with a third contact (10), and the third contact (10) penetrates through the second avoiding hole (85) and is welded through low-temperature soldering in the tripper (8).

6. A surge protector according to claim 5, wherein: the shell body bottom is provided with prevents mistake and inserts mechanism (5), have only on the base with prevent mistake and insert the holding tank that mechanism (5) suited.

7. A surge protector according to claim 1, wherein: the first indicating unit is an indicating circuit comprising a light emitting diode.

8. A surge protector according to claim 2, wherein: the indicator tape (11) is green and the color bar (112) is red.

9. A surge protector according to claim 5, wherein: the main body of the release (8) is made of an insulator material, and the wiring terminal (83) is made of a conductor.

10. A surge protector according to claim 9, wherein: the terminal (83) is a copper sheet embedded in the main body of the release (8).

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