A surge protector

Abstract

The utility model discloses a surge protector relates to surge protector technical field, solves the problem of unstable contact of connecting piece and " " type compression ring in traditional plug -in product. It includes base, protection module and base two -sided terminal assembly of plug -in connection in base insertion slot, and the insertion slot bottom base is equipped with the docking cavity, and the slot bottom opens the through -going groove, and the protection module bottom connecting piece extends into the through -going groove. The key improvement is to add pre -compression elastic part: " " type compression ring one end is equipped with the extension that extends to the docking cavity, and the pre -compression elastic part is located between the vertical piece and the docking cavity side wall, and the vertical piece is pushed and the connecting piece stable contact. The utility model eliminates the contact gap caused by processing error, vibration etc, avoids the poor contact, reduces the resistance and the risk of heating, prolongs the life, and retains the plug -in convenient maintenance advantage, and the structure is simple, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of surge protector technology, and specifically to a surge protector. Background Technology

[0002] Surge protectors, as key components in power systems and electronic equipment that suppress transient overvoltages and protect circuits from surge impacts, are widely used in communication base stations, industrial control equipment, and power distribution systems in civil buildings. With the development of power electronics technology, the requirements for power supply stability and safety are constantly increasing. The reliability of surge protectors depends not only on the performance of their core protection components (such as varistors and gas discharge tubes), but also directly on the stability of their internal circuit connection structure, which affects the protection effect and service life.

[0003] Currently, most pluggable surge protectors on the market employ a design where the base and protection module are separate. Installation and replacement are achieved through a plug-in connection between the protection module and the base's slot, greatly simplifying maintenance and reducing equipment downtime. To ensure circuit continuity, terminal assemblies are typically located at both ends of the base, while a connecting piece is positioned at the bottom of the protection module. When the protection module is inserted into the slot, the connecting piece extends through a connecting groove in the bottom wall of the slot into the mating cavity inside the base, forming an electrical connection with the terminal assemblies.

[0004] Existing terminal assemblies typically consist of a connecting ring, a U-shaped retaining ring, and fastening screws. The U-shaped retaining ring, as a key component for current conduction, requires effective contact at one end with the connecting plate of the protection module. In traditional structures, the U-shaped retaining ring and the connecting plate are often directly bonded together. However, this connection structure has significant limitations in practical applications: Firstly, during the insertion and removal of the protection module, slight wear can occur on the contact surfaces of the connecting plate and the U-shaped retaining ring. Over time, the gap gradually increases, leading to increased contact resistance. This not only affects current conduction efficiency but may also cause safety hazards due to localized heating. Secondly, due to factors such as machining accuracy errors, slight misalignment during installation, and environmental vibrations, it is difficult for the connecting plate and the U-shaped retaining ring to maintain a consistently tight fit. This can easily result in momentary poor contact, causing the surge protector to fail to respond properly at critical moments and lose its protective function for downstream equipment.

[0005] Therefore, optimizing the connection structure between the connector and terminal assembly in pluggable surge protectors, improving the stability and reliability of their contact, and avoiding performance failures caused by poor contact have become a pressing technical challenge in the current surge protector design field. Utility Model Content

[0006] To address the shortcomings of the prior art, this utility model provides a surge protector.

[0007] The technical solution adopted by this utility model is as follows: a surge protector, including a base, a protection module pluggably connected to a socket groove on the base, and terminal assemblies disposed at both ends of the base. The terminal assembly includes a wiring ring, a U-shaped pressure ring, and a fastening screw. A mating cavity is provided in the base at the bottom of the socket groove, and a connecting groove communicating with the mating cavity is provided on the bottom wall of the socket groove. A connecting piece extending from the connecting groove is provided at the bottom of the protection module, including a pre-compression elastic element. One end of the U-shaped pressure ring is provided with an extension extending to the mating cavity. The extension includes an elastic piece integrally disposed with one end of the U-shaped pressure ring and a vertical piece that mates with the connecting piece. The pre-compression elastic element is located between the vertical piece and the side wall of the mating cavity. The pre-compression elastic element has an elastic force that pushes the vertical piece toward the connecting piece to make the connecting piece and the vertical piece make stable contact and connection.

[0008] Furthermore, the vertical piece has a raised contact point on one side of the connecting piece.

[0009] Furthermore, the pre-compression elastic element is a helical spring, and spring posts that connect to both ends of the helical spring are provided on the surface of the vertical plate and the side wall of the docking cavity.

[0010] Furthermore, the elastic sheet has a wave-shaped structure.

[0011] Furthermore, the elastic sheet is provided with several through grooves at intervals.

[0012] Furthermore, the contact point is provided with an inlet ramp on one side of the connecting groove.

[0013] Furthermore, two guide steps are provided on the two side walls of the docking cavity, and the two sides of the vertical piece are provided with raised steps that fit with the limiting groove between the two guide steps.

[0014] The beneficial effects of this utility model are as follows: By setting a pre-compression elastic element between the vertical piece of the "U"-shaped pressure ring extension and the side wall of the docking cavity, the continuous and stable elastic force of the pre-compression elastic element pushes the vertical piece against the connecting piece of the protection module, ensuring a tight and stable contact between the two. Compared with the traditional technology where the connecting piece and the "U"-shaped pressure ring are directly attached, making the contact loose due to external factors, this design effectively eliminates the contact gap problem caused by machining accuracy errors, installation offsets, and environmental vibrations, avoiding the occurrence of instantaneous poor contact. This significantly reduces the contact resistance between the two, preventing localized heating caused by poor contact, effectively reducing contact resistance, minimizing safety hazards, and extending the service life of the device. Moreover, it does not require significant modification to the shape, has a simple structural design, strong adaptability, and wide versatility.

[0015] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages.

[0016] The following will refer to the accompanying drawings to further describe the utility model in detail. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural view of the utility model.

[0018] Figure 2 is an internal schematic view of the utility model.

[0019] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0020] Figure 4 is a schematic structural view of a "C"-shaped compression ring.

[0021] Figures 1-4 In the figure: 1. Base; 2. Insertion slot; 3. Protection module; 4. Wiring ring; 5. "C"-shaped compression ring; 6. Fastening screw; 7. Docking cavity; 8. Connecting groove; 9. Connecting piece; 10. Pre-pressing elastic member; 11. Elastic piece; 12. Vertical piece; 13. Contact; 14. Spring column; 15. Through groove; 16. Introduction slope; 17. Guide step; 18. Convex step. Detailed Embodiment

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the scope of protection of the utility model.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] The utility model provides a surge protector.

[0025] In this embodiment, referring to Figures 1-4The surge protector includes a base 1, a protection module 3 pluggably connected to a socket 2 on the base 1, and terminal assemblies at both ends of the base. The terminal assemblies include a wiring ring 4, a U-shaped pressure ring 5, and a fastening screw 6. A mating cavity 7 is provided in the base at the bottom of the socket 2, and a connecting groove 8 is provided on the bottom wall of the socket 2, which communicates with the mating cavity 7. A connecting piece 9 extending from the connecting groove is provided at the bottom of the protection module, including a pre-compression elastic element 10. One end of the U-shaped pressure ring is provided with an extension extending into the mating cavity. The extension includes an elastic piece 11 integrally formed with one end of the U-shaped pressure ring and a vertical piece 12 that mates with the connecting piece 11. The pre-compression elastic element is located between the vertical piece and the side wall of the mating cavity. The pre-compression elastic element has an elastic force that pushes the vertical piece toward the connecting piece to make the connecting piece and the vertical piece make stable contact and connection.

[0026] In the above technical solution, within the docking cavity of the pluggable surge protector, an extension portion extending into the docking cavity is added to the "U"-shaped pressure ring. This extension portion includes an integrally formed elastic plate and a vertical plate, and a pre-compression elastic element is disposed between the vertical plate and the side wall of the docking cavity. When the protection module is inserted into the base insertion slot, its bottom connecting plate extends into the docking cavity through the connecting groove. At this time, the pre-compression elastic element generates a continuous thrust due to its own elastic deformation, pushing the vertical plate towards the connecting plate. Simultaneously, the elastic plate can help buffer installation deviations and vibration impacts through its own deformation, ultimately enabling the vertical plate and the connecting plate to form a stable contact state, achieving reliable circuit conduction.

[0027] This technology addresses the root cause of contact instability in traditional direct-fit structures by eliminating contact gaps caused by machining errors, installation misalignment, and environmental vibrations through the continuous thrust of the pre-compressed elastic element. This ensures that the current conduction path remains unobstructed, guaranteeing the reliability of the surge protector's response under transient overvoltage scenarios. The elastic sheet and the pre-compressed elastic element form a collaborative buffering mechanism, which can adapt to the dynamic displacement during the insertion and removal of the protection module, and also alleviate vibration and shock during long-term use, reducing mechanical wear at the connection points. The overall structure does not change the core advantage of the plug-in design, improving reliability while retaining the convenience of quick installation and maintenance, thus balancing performance and practicality.

[0028] Specifically, the vertical piece has a raised contact point 13 on one side of the connecting piece.

[0029] In this embodiment, a raised contact point is provided on the side where the vertical piece contacts the connecting piece for connection with the connecting piece, thereby improving connection stability.

[0030] Specifically, the pre-compression elastic element is a helical spring, and spring posts 14 that connect to both ends of the helical spring are provided on the surface of the vertical plate and the side wall of the docking cavity.

[0031] In this embodiment, the pre-compression elastic element can be a helical spring, and spring posts are provided on the surface of the vertical plate and the side wall of the docking cavity respectively. The precise positioning and fixing of the pre-compression elastic element can be achieved by the sleeve engagement between the spring posts and the two ends of the helical spring.

[0032] Specifically, the elastic sheet has a wave-shaped structure.

[0033] In this embodiment, the wave-shaped structure has a larger deformation space compared to the planar elastic sheet, which can effectively buffer the impact force during module insertion and removal, and avoid damage caused by hard contact between the vertical sheet and the connecting sheet. Moreover, it can disperse stress concentration, reduce the risk of fatigue fracture after long-term repeated deformation of the elastic sheet, and extend the service life of the extension.

[0034] Specifically, the elastic sheet is provided with a plurality of through grooves 15 at intervals.

[0035] In this embodiment, the through groove reduces the rigidity of the elastic sheet, disperses stress concentration points, and prevents cracks from appearing in specific locations after long-term repeated deformation of the elastic sheet. It is especially suitable for corrugated elastic sheets and can further enhance their fatigue resistance.

[0036] Specifically, the contact point is provided with an inlet ramp 16 on one side of the connecting groove.

[0037] In this embodiment, the guiding effect of the inclined plane reduces the alignment accuracy requirements when inserting the protection module and improves the convenience of inserting and removing the protection module.

[0038] Specifically, two guide steps 17 are provided on the two side walls of the docking cavity, and the two sides of the vertical piece are provided with protruding steps 18 that fit with the limiting groove between the two guide steps 17.

[0039] In this embodiment, the cooperation between the limiting groove and the protruding step prevents the vertical piece from shifting laterally, ensuring that the vertical piece and the connecting piece always maintain parallel contact facing each other.

[0040] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A surge protector, comprising a base, a protection module pluggably connected to a socket in the base, and terminal assemblies disposed at both ends of the base, wherein the terminal assemblies include a wiring ring, a U-shaped pressure ring, and a fastening screw; a mating cavity is provided in the base at the bottom of the socket; a connecting groove communicating with the mating cavity is provided on the bottom wall of the socket; and a connecting piece extending into the connecting groove is provided at the bottom of the protection module, characterized in that: The device includes a pre-compression elastic element. One end of the "U"-shaped pressure ring is provided with an extension portion extending into the docking cavity. The extension portion includes an elastic sheet integrally formed with one end of the "U"-shaped pressure ring and a vertical piece that docks with the connecting piece. The pre-compression elastic element is located between the vertical piece and the side wall of the docking cavity. The pre-compression elastic element has an elastic force that pushes the vertical piece toward the connecting piece to make the connecting piece and the vertical piece make stable contact and connection.

2. The surge protector according to claim 1, characterized in that: The vertical piece has a raised contact point on one side of the connecting piece.

3. The surge protector according to claim 1, characterized in that: The pre-compression elastic element is a helical spring, and spring posts that connect to both ends of the helical spring are provided on the surface of the vertical plate and the side wall of the docking cavity.

4. The surge protector according to claim 1, characterized in that: The elastic sheet has a wave-shaped structure.

5. The surge protector according to claim 1 or 4, characterized in that: The elastic sheet is provided with several through slots at intervals.

6. The surge protector according to claim 2, characterized in that: The contact point is located on one side of the connecting groove and has an inlet ramp.

7. The surge protector according to claim 1, characterized in that: The two sides of the docking cavity are provided with two guide steps, and the two sides of the vertical piece are provided with raised steps that fit with the limiting groove between the two guide steps.

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