Surge protection device

Abstract

The present invention provides a surge protection device. The surge protection device comprises a base and a protection module; the protection module comprises inverted snaps, a slide groove, a PCB, a light guide column, and a Type-C interface; the base comprises a lower housing, a cover, a grounding piece, wiring terminals, wire plugging ports, clips, inverted snap grooves, bus pins, and grounding clips; each wiring terminal comprises a pressing block, a U-shaped elastic piece, and a copper busbar; the base and the protection module are connected by means of the clips, the inverted snap grooves, and the inverted snaps; and the slide groove is of an error-proof design. According to the present invention, wire plugging and unplugging can be achieved without using tools, and ordered arrangement of wires is achieved; in addition, a 30 kA instantaneous current or a larger impact current can be resisted.

Description

surge protection device Technical Field

[0001] The present invention belongs to the technical field of power failure protection, and in particular relates to a surge protection device. Background Art

[0002] Lightning is a natural phenomenon. The instantaneous current generated by lightning can reach several kA to hundreds of kA. Even induced lightning currents can be extremely destructive to signal systems. For signal systems, lightning current protection is a top priority. Overvoltages caused by lightning or other factors can not only harm the signal system but also irreversibly damage the sensors and converters within it. Currently, signal systems typically use two-terminal surge protectors (SPDs) for protection. The purpose of a surge protector is to limit transient overvoltages within the signal system to a safe range, preventing damage to equipment in the circuit.

[0003] The protection principle of the surge protector is: under normal working conditions, the surge protector presents high impedance to normal power frequency voltage, and almost no current passes through, which is equivalent to an open circuit and has no effect on the signal transmission of the system; when a transient high voltage appears in the system, the surge protector presents low impedance to the overvoltage, which is equivalent to a short circuit. The surge protector will discharge the strong current generated by the transient voltage to the ground, thereby protecting the protected equipment.

[0004] Therefore, for the signal system, if the surge protector cannot effectively discharge the large current generated by the overvoltage or cannot better withstand the large transient voltage, the signal system will be damaged.

[0005] At the same time, when installing the surge protector, due to the large number of signal system channels, multiple surge protectors need to be installed. During installation, the wire connection terminals need to be tightened with screws. Due to the large number of lines, the operation is more troublesome. When installing a complex signal system, it is also urgent to provide a surge protector that is easy to operate and easy to wire, which can greatly reduce the installation time and the probability of error.

[0006] Summary of the Invention

[0007] The present invention provides a surge protection device, including a base and a protection module, wherein the protection module includes an undercut groove, an undercut, a slide groove, a PCB board, a light guide column, and a TYPE-C interface; the base includes a lower shell, a cover, a grounding piece, a wiring terminal, a wire socket, a clip, a bus pin, and a grounding clip; the base and the protection module are connected by the clip, the undercut groove, and the undercut; the wiring terminal includes a pressing block, a U-shaped spring clip, and a copper busbar.

[0008] Furthermore, the clip is U-shaped.

[0009] The further clip comprises a clip body, a barb structure and a connecting portion, wherein the clip body and the barb structure are connected via the connecting portion.

[0010] In a further surge protection device, the clip body is provided with a right clip claw and a left clip claw, the barb structure is provided with a bent portion, the bent portion forms point contact with the clip body and presses against the clip body.

[0011] Furthermore, the clip body and the hook structure are designed as an asymmetrical eccentric structure.

[0012] Furthermore, the pressing block and the U-shaped spring piece are connected via a copper busbar.

[0013] Furthermore, the grounding member includes a connecting end and a semicircular body, wherein the connecting end is connected to the grounding clip through a wire.

[0014] Furthermore, the slide groove is asymmetrically designed, and there is a width difference between the two sides of the slide groove.

[0015] Beneficial effects of the present invention:

[0016] (1) Simple and intuitive connection with both hands, 100% tool-free operation;

[0017] (2) With double U-shaped spring clip direct plug-in connection, it can save more than 80% of the wiring time, and the wiring time can be completed within 1 second

[0018] (3) The plug-in series does not require replacement of the base, and the surge protection module can be replaced without rewiring. The slide slot is asymmetrically designed to prevent wrong insertion.

[0019] (4) Direct plug-in wiring is safer and does not damage the wires. No tools are required for wiring. Specifically, direct plug-in wiring can be fully realized without using a screwdriver, thus avoiding scratches when tightening the screws.

[0020] (5) Advantages of side wiring: Because all wiring is at the side of the surge protector, it is at a certain angle to the wiring, which greatly reduces the bending of the wires, making the wires more secure and reliable after wiring. Side wiring also avoids stress damage during wiring.

[0021] (6) Longer service life, no need for subsequent screw tightening, the spring clip crimping can be stuck more firmly.

[0022] (7) Applied to power-off protection of signal systems, it can withstand surge currents of 30kA or greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 is a schematic diagram of a surge protector;

[0025] Figure 2 is a schematic perspective view of a surge protector;

[0026] Figure 3 is a diagram showing the internal structure of the surge protector base;

[0027] Figure 4 is a schematic diagram of the clip structure;

[0028] FIG5 is a partial enlarged view of A in FIG3 of the present invention;

[0029] FIG6 is a schematic structural diagram of the connection relationship between the pressing block, the U-shaped spring piece and the copper busbar of the present invention;

[0030] FIG7 is a schematic diagram of the structure of the pressing block, U-shaped spring piece and copper busbar after the wire is inserted;

[0031] FIG8 is a schematic diagram of the structure of the grounding member of the present invention;

[0032] FIG9 is a schematic diagram of an undercut and a slide groove according to the present invention;

[0033] FIG10 is a schematic structural diagram of a surge protector according to another embodiment of the present invention.

[0034] Description of Reference Numerals

[0035] 1-base; 2-protection module; 3-lower shell; 4-cover, 5-grounding piece, 6-pressing block; 7-U-shaped spring clip; 8-copper busbar; 9-wire insertion port; 10-clip; 11-inverted groove; 12-inverted; 13-bus pin; 14-slide; 15-PCB board; 16-light guide column; 17-TYPE-C interface; 18-grounding clip; 19-hook structure; 20-right clip claw; 21-left clip claw; 22-clip body; 23-connecting part; 24-bending part; 25-wire insertion channel; 26-connecting end; 27-semicircular body; 28-contact end; 29-pressing part; 30-pick; 31-bending part; wire-32; wire-33. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures indicate identical or similar parts, and thus repeated descriptions thereof will be omitted.

[0037] In addition, the described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, well-known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0038] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being "below" another element or feature will be positioned "above" the other element or feature. Thus, the exemplary term "lower" can include both upper and lower orientations. The device can also be positioned in other ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein can be interpreted accordingly.

[0039] The present invention provides a surge protection device. The overall structure of the surge protection device is described in conjunction with Figures 1 to 10. The surge protection device includes: a base 1, a protection module 2, the protection module 2 including an undercut 12, a slide groove 14, a PCB board 15, a light guide column 16, and a TYPE-C interface 17; the base includes a lower shell 3, a cover 4, a grounding member 5, a wiring terminal, a wire socket 9, a clip 10, an undercut groove 11, a bus pin 13, and a grounding clip 18; the wiring terminal includes a pressing block 6, a U-shaped spring 7, and a copper busbar 8;

[0040] The base 1 and the protection module 2 are connected by a clip 10, an undercut groove 11 and an undercut 12; when the base 1 and the protection module 2 are connected, the slide groove 14 is designed to prevent incorrect insertion, which can prevent the protection module 2 from being inserted into the base 1.

[0041] The base 1 is connected to the guide rail and is installed on the guide rail through a grounding piece 5. A wire socket 9 is provided on the side of the base lower shell 3, and the wires are connected from the wire socket 9. A protection circuit is installed on the PCB board 15 provided in the protection module 2.

[0042] The pressing block 6 is connected to the clip 10 via an electric wire 33 .

[0043] The internal structure of the base is described in detail below with reference to Figures 3 and 4. The clip 10 of the base is U-shaped. The clip 10 includes a clip body 22, a hook structure 19, and a connecting portion 23. One end of the clip body 22 is connected to one end of the hook structure 19 via the connecting portion 23. The other end of the clip body 22 is provided with a right clip claw 20 and a left clip claw 21. The other end of the hook structure 19 is provided with a bent portion 24. Preferably, the bent portion 24 of the hook structure 19 forms a point contact with the clip body 22 and presses against the clip body 22. When the PCB board 15 is inserted between the clip body 22 and the hook structure 19, the PCB board 15 can be fixed.

[0044] Preferably, the clip body 22 and the barb structure 19 are designed as an asymmetrical eccentric structure;

[0045] The above-mentioned design of the clip 10 structure can connect and fix the PCB board 15, and can withstand strong impact current when a lightning current impact is required. The clip 10 is directly connected to the PCB board 11 through the bent portion 24, which plays the role of passing current and fixing the PCB board. The specific functions are as follows: 1. The pressing block and the PCB board are connected by a wire, which acts as a connecting bridge; 2. The lightning current in the line is discharged through the lightning protection module and the grounding system. The U-shaped structure can withstand strong impact resistance; 3. It plays a fixing role when the circuit board is inserted. Since the hook structure 19 and the clip body 22 adopt an eccentric design to make the two sides asymmetrical, there is more space on one side of the PCB board 15 to distribute a certain height. Electronic components, saving space; the circuit of the PCB board 15 is between the clips 10, and the double-sided clip and the single-sided clip are composed of multiple contact points composed of the right clip claw 20 and the left clip claw 21. By increasing the contact points, current can flow on both sides, increasing the current discharge capacity; 4. The left and right clip claws and the bending part 24 are designed, wherein the right clip claw 20 and the left clip claw 21 will cause the circuit board to be stressed on both sides. Due to the large shrinkage rate of the plastic shell, the plastic shell of the surge protector absorbs water and expands when it is exposed to moisture or the processing tolerance is large, resulting in deformation. If a single-sided clip and a plastic shell are used for fixing, the crimping force will be affected. Therefore, the bending part 24 and the right clip claw 20 and the left clip claw 21 are used to bear force on both sides to form a clamping force, accurate positioning, and uniform force. The clip 10 is also connected to the grounding piece 5 through a wire;

[0046] 5, 6, and 7, the structure of the terminal block and the working mode when plugging and unplugging the wires are described in detail. The terminal block includes a pressing block, a U-shaped spring piece 7 and a copper bus 8. The pressing block 6 is provided with a contact end 28, a pressing portion 29, and a paddle 30. The U-shaped spring piece 7 is provided with a bending portion 31. The contact end 28 of the pressing block 6 contacts and presses against the copper bus 8. The bending portion 31 of the U-shaped spring piece 7 contacts and presses against the pressing block 6. The pressing block 6 and the copper bus 8 are provided with a channel for inserting the wire 32 at the corresponding position. The channel corresponds to the plugging channel 25. It can be seen that when the wire 32 is connected from the wire insertion channel 25 of the wire insertion port 9 of the base, it passes through the pressing block 6 and the copper bus 8. When the wire 32 is inserted, the pick 30 of the pressing block 6 will press down the bending part 31 of the U-shaped spring piece 7, so that the wire can be smoothly inserted into the wire insertion channel 25. When the wire 32 needs to be pulled out, the pressing part 29 of the pressing block 6 is pressed to apply force to the U-shaped spring piece 7, and the wire 32 can be directly pulled out. The operation is simpler. The U-shaped spring piece 7 is self-locking after the wire is inserted during wiring. No tools are required. When removing the wire, the pressing block 6 is pressed to pull out the wire.

[0047] As shown below, in conjunction with Figures 1 to 7 , the structure of the pressing block 6, U-shaped spring clip 7, and copper busbar 8 allows wires to be inserted from the side of the surge protector. When the surge protector is installed on a guide rail, multiple surge protectors may be used. This structure allows for more regular wire routing, thus avoiding clutter. When the present invention is in operation, the current flowing through the wire 32 through the loop formed by the pressing block 6 and the clip 10 can withstand lightning strikes exceeding 30kA.

[0048] 8 illustrates the grounding member 5, the grounding member 5 includes a connecting end 26, a semicircular body 27, wherein the connecting end 26 is connected to the grounding clip 18 via a wire, the semicircular body 27 is set to a semicircular shape to facilitate card mounting on the base.

[0049] The following structural figures 3, 5 and 9 illustrate the structures of the undercut groove 11, the undercut 12 and the slide groove 14 in detail. The slide groove 14 of the protection module 2 is designed to prevent wrong insertion. Specifically, the anti-wrong insertion design is that the slide groove 14 is asymmetrically designed, and the width of the two sides of the slide groove 14 is designed to have a width difference. Preferably, the width of the slide groove differs by 1 to 5 mm, so that wrong insertion can be prevented during insertion.

[0050] The undercut 12 and the undercut groove 11 serve to fix the protection module 2 and the base 1 .

[0051] The base 1 is provided with a bus pin 13, and the bus pin 13 is connected to the bus copper bar on the guide rail through a connector, wherein the connector and the guide rail are not listed in the drawings.

[0052] The protection module 2 is also provided with a light guide column 16, which is used to display the failure state of the module. When the light guide column lights up, it means that the protection module needs to be replaced. The base does not need to be replaced when replacing it.

[0053] The functions of the light guide column are as follows: 1. The transparent light guide column has a focusing effect, and the light emitted by the indicator light is gathered together, which makes it clearer for customers; 2. It forms a sealed space with the shell to prevent dust from entering, reaching the IP20 level or above; 3. It has an anti-static effect to prevent static electricity from damaging the circuit through the lamp hole; 3. It displays the failure status of the module.

[0054] FIG10 is an example of another embodiment of the present invention, which is a two-wire surge protection device. In this embodiment, four pressing blocks 6 are provided, and correspondingly four clips 10 are provided. The clips 10 are connected to the pressing blocks 6 through wires 33 .

[0055] The base further includes an identification plate, and identification card slots are set on both sides. This structure is not marked on the attached figure.

[0056] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, the technical solution of the present invention may be subjected to a variety of simple modifications, including combining the various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A surge protection device, comprising a base and a protection module, characterized in that: The protection module includes a buckle, a slide groove, a PCB board, a light guide column, and a TYPE-C interface; the base includes a lower shell, a cover, a grounding piece, a wiring terminal, a wire plug port, a clip, a buckle groove, a bus pin, and a grounding clip; the base and the protection module are connected through the clip, the buckle groove, and the buckle; the wiring terminal includes a pressing block, a U-shaped spring clip, and a copper busbar.

2. The surge protection device according to claim 1, characterized in that: The clip is in a U shape.

3. The surge protection device according to claim 1 or 2, characterized in that: The clip comprises a clip body, a barb structure and a connecting portion, and the clip body and the barb structure are connected via the connecting portion.

4. The surge protection device according to claim 3, characterized in that: The clip body is provided with a right clip claw and a left clip claw, and the barb structure is provided with a bent portion, and the bent portion forms a point contact with the clip body and presses against the clip body.

5. The surge protection device according to claim 3, characterized in that: The clip body and the barb structure are designed as an eccentric structure with an asymmetrical shape.

6. The surge protection device according to claim 1, characterized in that: The pressing block is provided with a contact end, a pressing portion, and a paddle, and the U-shaped spring sheet is provided with a bending portion. The contact end of the pressing block contacts the copper busbar, and the bending portion of the U-shaped spring sheet contacts the pressing block.

7. The surge protection device according to claim 1, characterized in that: The grounding member comprises a connecting end and a semicircular body, wherein the connecting end is connected to the grounding clip through a wire.

8. The surge protection device according to claim 1, characterized in that: The slide groove is asymmetrically designed, and there is a width difference between the two sides of the slide groove.

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