Miniaturized surge protector

Abstract

The utility model discloses a miniaturized surge protector, which comprises a middle shell, a right shell and a left shell, the right shell and the left shell are respectively arranged on two sides of the middle shell, an accommodating groove is arranged on the middle shell, a surge protection module is arranged at the accommodating groove, a first terminal and a second terminal are respectively arranged in the middle shell, two connecting holes communicated with the accommodating groove are arranged on the middle shell, and the right shell and the left shell are respectively connected with the first terminal and the second terminal. A first metal clamping piece and a second metal clamping piece are installed in the two connecting holes respectively, a piezoresistor chip is installed in the surge protection module, the surge protection module and the backup protector share one middle shell, the space utilization rate is improved, and the surge protection module is convenient to use. One pin of the piezoresistor chip is connected with the second terminal through the second metal clamping piece, the other pin of the piezoresistor chip is connected with the electromagnetic coil through the first metal clamping piece and the discharge tube, and the piezoresistor chip and the backup protector share the first terminal and the second terminal, so that the size is reduced, the occupied space is reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of surge protectors, in particular to a miniaturized surge protector. Background Art

[0002] Surge protector is an indispensable device in lightning protection of electronic equipment. Its main function is to conduct and shunt in a very short time when a spike current or voltage is suddenly generated due to external interference in electrical circuits or communication lines, and discharge the overvoltage and overcurrent to the ground, thereby avoiding damage to other equipment in the circuit caused by surges. Surge protector is usually used in combination with SPD backup protector. The main function of SPD backup protector is to provide additional protection and support to ensure the normal operation of surge protector and effective surge protection.

[0003] The existing surge protector and SPD backup protector are usually spliced ​​together for use. The thickness is at least 18mm+9mm, the total thickness is 27mm, and generally 36mm. It is large in size and occupies more space. However, the space in the distribution box is relatively limited, and it cannot meet people's usage needs well. Utility Model Content

[0004] The purpose of the utility model is to provide a miniaturized surge protector to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a miniaturized surge protector, comprising a middle shell, a right shell and a left shell respectively installed on both sides of the middle shell, the middle shell being provided with a receiving groove, a surge protection module being installed at the receiving groove, a first terminal and a second terminal being respectively installed inside the middle shell, the middle shell being provided with two connecting holes connected to the receiving groove, a first metal clip and a second metal clip being respectively installed inside the two connecting holes, a varistor chip being installed inside the surge protection module, two pins respectively matched with the first metal clip and the second metal clip being provided on one side of the varistor chip, a discharge tube being installed between the left shell and the middle shell, the second metal clip being connected to the second terminal, and the first metal clip being connected to the discharge tube.

[0006] As a preferred solution of the utility model, the inner wall of the surge protection module is fixedly connected with a support plate, an L-shaped rod is movably installed inside the surge protection module, the varistor chip is provided with pins, one side of the L-shaped rod is welded and fixed to the pins, the inner wall of the surge protection module is fixedly connected with a limit frame, one side of the limit frame is provided with a vertical rod, the outer side of the vertical rod is sleeved with a spring, an indicator is slidably installed inside the surge protection module, one side of the indicator is provided with two shift blocks, and the inner wall of the surge protection module is fixedly connected with a limit plate.

[0007] As a preferred solution of the utility model, a slot is provided on the inner wall of the accommodating groove, and plug blocks which are interference-fitted with the slot are provided on both sides of the plug block.

[0008] As a preferred solution of the utility model, a micro switch is installed inside the middle shell, and a through hole is penetrated through one side of the surge protection module.

[0009] As a preferred solution of the utility model, an indicator hole is provided on a side of the surge protection module away from the plug pin.

[0010] As a preferred solution of the utility model, an arc extinguishing chamber, an electromagnetic coil and an operating mechanism are provided between the left shell and the middle shell, and the discharge tube is connected to the electromagnetic coil.

[0011] As a preferred solution of the present utility model, the thickness of the middle shell is 18 mm, and the thickness of the surge protection module is 9 mm.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the surge protection module of the utility model has a simple structure, which reduces its volume; the surge protection module and the backup protector share a middle shell, which improves space utilization; and one pin of the varistor chip is connected to the second terminal through the second metal clip, and the other pin is connected to the electromagnetic coil through the first metal clip and the discharge tube, and shares the first terminal and the second terminal with the backup protector, thereby reducing the volume, reducing the occupied space, and saving costs; and the total thickness of the surge protection module and the backup protector is only 18 mm, which is greatly reduced compared to 27 mm in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the surge protection module of the utility model after being disassembled;

[0015] Figure 3 This is a schematic diagram of the structure of the utility model after the surge protection module and the right housing are disassembled;

[0016] Figure 4 It is a structural schematic diagram of the left housing of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the surge protection module of the utility model;

[0018] Figure 6 This is a schematic diagram of the internal structure of the surge protection module of the utility model;

[0019] Figure 7It is a structural schematic diagram of the middle shell of the utility model.

[0020] In the figure: 1, middle shell; 2, left shell; 3, surge protection module; 4, right shell; 5, indication hole; 6, micro switch; 7, receiving groove; 8, connecting hole; 9, slot; 10, first terminal; 11, first metal clip; 12, second terminal; 13, discharge tube; 14, arc extinguishing chamber; 15, electromagnetic coil; 16, operating mechanism; 17, limit plate; 18, plug block; 19, plug pin; 20, varistor chip; 21, indicator; 22, through hole; 23, support plate; 24, limit frame; 25, L-shaped rod; 26, spring; 27, vertical rod; 28, pin; 29, shift block; 30, second metal clip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 7The utility model provides a technical solution: a miniaturized surge protector, comprising a middle shell 1, a right shell 4 and a left shell 2 respectively installed on both sides of the middle shell 1, a receiving groove 7 is provided on the middle shell 1, a surge protection module 3 is installed at the receiving groove 7, the surge protection module 3 and the backup protector share the same middle shell 1, so as to improve the space utilization rate, thereby reducing the volume and the occupied space, a first terminal 10 and a second terminal 12 are respectively installed inside the middle shell 1, two connecting holes 8 connected with the receiving groove 7 are provided on the middle shell 1, a first metal clip 11 and a second metal clip 30 are respectively installed inside the two connecting holes 8, the first metal clip 11 and the second metal clip 30 are used to clamp the pin 19, which can not only make the surge protection module 3 more firmly installed, but also the first metal clip 11 and the second metal clip 30 can be installed in the middle shell 1. The clip 30 and the pin 19 can be electrically connected. A varistor chip 20 is installed inside the surge protection module 3. Two pins 19 that match the first metal clip 11 and the second metal clip 30 are provided on one side of the varistor chip 20. A discharge tube 13 is installed between the left shell 2 and the middle shell 1. The second metal clip 30 is connected to the second terminal 12, the first metal clip 11 is connected to the discharge tube 13, and the discharge tube 13 is connected to the first terminal 10. One pin 19 of the varistor chip 20 is connected to the second terminal 12 through the second metal clip 30, and the other pin 19 is connected to the electromagnetic coil 15 through the first metal clip 11 and the discharge tube 13, so that the surge protection module 3 is connected to the circuit and shares the first terminal 10 and the second terminal 12 with the backup protector to reduce the volume.

[0023] Among them, the inner wall of the surge protection module 3 is fixedly connected with a support plate 23, one end of the support plate 23 is provided with a cylindrical portion, and the L-shaped rod 25 can rotate with the cylindrical portion as the center of the circle. The L-shaped rod 25 is movably installed inside the surge protection module 3, and a pin 28 is provided on the varistor chip 20. One side of the L-shaped rod 25 is welded and fixed to the pin 28. Low-temperature solder is used between the L-shaped rod 25 and the pin 28. When the varistor chip 20 is struck by lightning, the pin 28 heats up, and the low-temperature solder is melted, so that the L-shaped rod 25 is separated from the pin 28. The spring 26 pushes the L-shaped rod 25 away from the pin 28, and the L-shaped rod 25 is softly connected to one of the adjacent pins 19. The inner wall of the surge protection module 3 A limit frame 24 is fixedly connected, and the limit frame 24 is used to limit the varistor chip 20 to ensure that the varistor chip 20 is firmly installed. A vertical rod 27 is provided on one side of the limit frame 24, and a spring 26 is sleeved on the outer side of the vertical rod 27. An indicator 21 is slidably installed inside the surge protection module 3, and the indicator 21 is used to indicate the state of the varistor chip 20. Two shift blocks 29 are provided on one side of the indicator 21, and one end of the L-shaped rod 25 extends between the two shift blocks 29, so that the L-shaped rod 25 can drive the indicator 21 to move. The inner wall of the surge protection module 3 is fixedly connected with a limit plate 17, and the limit plate 17 is used to limit the indicator 21 to prevent the indicator 21 from shifting when moving.

[0024] The inner wall of the accommodating groove 7 is provided with a slot 9 , and both sides of the insert block 18 are provided with insert blocks 18 which are interference-fitted with the slot 9 . The slot 9 and the insert block 18 cooperate to fix the surge protection module 3 on the middle shell 1 .

[0025] Among them, a micro switch 6 is installed inside the middle shell 1. When the L-shaped rod 25 is separated from the pin 28, the L-shaped rod 25 no longer blocks the driving rod of the micro switch 6. The driving rod pops up, and the micro switch 6 generates an electrical signal. The electrical signal is transmitted to the machine room so that the staff can find it in time and replace the surge protection module 3. A through hole 22 is penetrated on one side of the surge protection module 3. The through hole 22 allows the driving rod of the micro switch 6 to enter the surge protection module 3. When the L-shaped rod 25 is not separated from the pin 28, the driving rod of the micro switch 6 will be blocked by the L-shaped rod 25.

[0026] A side of the surge protection module 3 away from the plug pin 19 is provided with an indication hole 5 , and the indication hole 5 is convenient for observing the indication member 21 .

[0027] Among them, an arc extinguishing chamber 14, an electromagnetic coil 15 and an operating mechanism 16 are provided between the left shell 2 and the middle shell 1. A moving contact is provided on the operating mechanism 16, and a static contact is provided on the first terminal 10. The moving contact and the static contact are not shown in the drawings. The arc extinguishing chamber 14, the electromagnetic coil 15 and the operating mechanism 16 are all existing technologies, so they are not elaborated in detail. The discharge tube 13 is connected to the electromagnetic coil 15.

[0028] The thickness of the middle shell 1 is 18 mm, and the thickness of the surge protection module 3 is 9 mm.

[0029] Specifically, when the varistor chip 20 is struck by lightning, the low-temperature solder between the pin 28 and the L-shaped rod 25 melts, and under the action of the spring 26, the L-shaped rod 25 moves, and the L-shaped rod 25 is separated from the pin 28. The long side of the L-shaped rod 25 pushes the indicator 21 to move through the shift block 29, and the indicator 21 displayed at the indicator hole 5 changes from green to red, and the short side of the L-shaped rod 25 no longer blocks the driving rod of the microswitch 6. The driving rod pops open, and the microswitch 6 generates an electrical signal, which is transmitted to the machine room so that the staff can find it in time and replace the surge protection module 3.

[0030] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miniaturized surge protector, comprising a middle shell (1), a right shell (4) and a left shell (2) respectively mounted on both sides of the middle shell (1), characterized in that: The middle shell (1) is provided with a receiving groove (7), a surge protection module (3) is installed at the receiving groove (7), a first terminal (10) and a second terminal (12) are respectively installed inside the middle shell (1), two connection holes (8) connected to the receiving groove (7) are provided on the middle shell (1), a first metal clip (11) and a second metal clip (30) are respectively installed inside the two connection holes (8), a varistor chip (20) is installed inside the surge protection module (3), two pins (19) are respectively matched with the first metal clip (11) and the second metal clip (30) on one side of the varistor chip (20), a discharge tube (13) is installed between the left shell (2) and the middle shell (1), the second metal clip (30) is connected to the second terminal (12), and the first metal clip (11) is connected to the discharge tube (13).

2. A miniaturized surge protector according to claim 1, characterized in that: The inner wall of the surge protection module (3) is fixedly connected to a support plate (23); an L-shaped rod (25) is movably installed inside the surge protection module (3); a pin (28) is provided on the varistor chip (20); one side of the L-shaped rod (25) is welded and fixed to the pin (28); the inner wall of the surge protection module (3) is fixedly connected to a limit frame (24); a vertical rod (27) is provided on one side of the limit frame (24); a spring (26) is sleeved on the outer side of the vertical rod (27); an indicator (21) is slidably installed inside the surge protection module (3); two shifting blocks (29) are provided on one side of the indicator (21); and the inner wall of the surge protection module (3) is fixedly connected to a limit plate (17).

3. A miniaturized surge protector according to claim 1, characterized in that: The inner wall of the accommodating groove (7) is provided with a slot (9), and both sides of the surge protection module (3) are provided with plug-in blocks (18) which are interference-fitted with the slot (9).

4. The miniaturized surge protector according to claim 1, characterized in that: A micro switch (6) is installed inside the middle shell (1), and a through hole (22) is provided through one side of the surge protection module (3).

5. The miniaturized surge protector according to claim 1, characterized in that: The surge protection module (3) is provided with an indication hole (5) on a side away from the plug pin (19).

6. The miniaturized surge protector according to claim 1, characterized in that: An arc extinguishing chamber (14), an electromagnetic coil (15) and an operating mechanism (16) are provided between the left shell (2) and the middle shell (1), and the discharge tube (13) is connected to the electromagnetic coil (15).

7. The miniaturized surge protector according to claim 1, characterized in that: The thickness of the middle shell (1) is 18 mm, and the thickness of the surge protection module (3) is 9 mm.

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