Backup protection device and surge protector

Abstract

The utility model relates to the field of surge protector equipment, in particular to a backup protection device and a surge protector. The backup protection device provided by the utility model is used for the surge protector, and comprises a trigger assembly, a hook body group and a moving member capable of moving along a first direction to be separated from two electrodes on a grounding loop, the hook body group comprises two hook body parts, and the two hook body parts are respectively located at two sides of the moving member and abut against the moving member. And the two hook body parts are used for limiting the moving part to move under the action of the spring, and are matched with the triggering assembly.

Description

Technical Field

[0001] The utility model relates to the field of surge protector equipment, in particular to a backup protection device and a surge protector. Background Art

[0002] In order to realize the active disconnecting function of the backup protection device of the surge protector, the backup protection device of the current surge protector controls the action of the electromagnetic release by cooperating with the current transformer on the grounding circuit. The action side of the electromagnetic release cooperates with the moving part through structural parts such as the hook body. The moving part contacts the electrodes on both sides of the interval on the grounding circuit to realize the conduction of the interval. The action side of the electromagnetic release constrains the moving part through the structural parts, so that the moving part can overcome the elastic force of the spring and maintain contact with the electrodes on both sides of the interval on the grounding circuit. When the current flowing through the grounding circuit reaches the triggering threshold of the electromagnetic release, the restraining force of the action side of the electromagnetic release on the moving part disappears, so that the moving part moves under the action of the spring to separate from the electrodes on both sides of the interval on the grounding circuit, thereby disconnecting the grounding circuit.

[0003] The problem with the above solution is that the action side of the electromagnetic release cooperates with the moving part through structural parts such as a hook body. The hook body and other structural parts are inserted into the slots on the moving part, which not only constrains the moving part along its moving direction, but also generates a lateral force on the moving part along the insertion direction of the hook body and other structural parts. The moving part cooperates with the structural wall of the device in the backup protection device to realize its movement under the action of the spring. The lateral force causes the moving part to deviate or causes the moving part to collide with the structural wall of the backup protection device at its side end face, resulting in excessive friction between the two, affecting its moving speed and even causing it to get stuck, making it impossible to disconnect the grounding circuit in time. Utility Model Content

[0004] On the one hand, the utility model provides a backup protection device that can reduce the space occupied by the structure for realizing the active disconnection function in the surge protector, so as to promote the miniaturization of the product;

[0005] On the other hand, the utility model provides a surge protector.

[0006] The backup protection device provided by the utility model is used for a surge protector, and includes a trigger assembly, a hook group and a movable member capable of moving along a first direction to disengage from two electrodes on a grounding circuit. The hook group includes two hook parts, and the two hook parts are respectively located on both sides of the movable member and abut against the movable member to limit the movement of the movable member under the action of a spring. The two hook parts cooperate with the trigger assembly.

[0007] Furthermore, a linkage assembly is provided between the two hook bodies for enabling the two hook bodies to maintain consistent movement.

[0008] Furthermore, the hook body group includes two rods that can rotate around a rotating axis, and each of the rods forms the hook body portion at one end close to the moving part to form a clamp-shaped structure. The hook body portion can rotate with the rod until it is disengaged from the moving part. The linkage assembly includes a cable, and the end of the rod away from the moving part is connected to one end of the cable. The trigger assembly cooperates with the cable to cause the cable to bend.

[0009] Furthermore, the two rods rotate around one rotation axis.

[0010] Furthermore, the hook body group includes two rods that can rotate around a rotating axis, and each of the rods is provided with a hook body portion at one end close to the moving member to form a clamp-shaped structure. The hook body portion can rotate with the rod until it disengages from the moving member, and the linkage assembly includes two meshing gear members, and each of the rods is provided with a coaxially rotating gear member.

[0011] Furthermore, one end of at least one of the rods away from the moving member is connected to the trigger assembly via a cable.

[0012] Furthermore, a channel structure is provided on the movable part, and the two hook bodies extend into the channel structure through the openings at both ends of the channel structure respectively. The hook body has an abutment surface inclined relative to the first direction, and the abutment surface abuts against the inner wall surface of the channel structure near the opening.

[0013] Furthermore, the inner wall surface of the channel structure close to the opening is inclined relative to the first direction.

[0014] Furthermore, the trigger assembly includes an action piece and a support assembly, the action piece and the support assembly offset each other through the magnetic force generated by the support assembly, and a hook is provided on the action piece, and the hook cooperates with the cable to pull the cable to bend.

[0015] The surge protector provided by the utility model comprises a lightning protection component. The lightning protection component and the moving part in any one of the above backup protection devices are arranged in series on a grounding loop.

[0016] Beneficial effects

[0017] In this solution, the trigger part directly cooperates with the moving part through the hook structure, and the support assembly rotates with the trigger part to achieve the miniaturization of the active disconnecting functional structure. However, the arc motion trajectory of the trigger part when it rotates can easily cause the hook structure between it and the moving part to get stuck, resulting in the problem that the trigger part and the moving part cannot be disengaged. A solution of sliding cooperation between the support assembly and the frame is adopted. The sliding direction of the support assembly is perpendicular to the direction of the rotation axis of the trigger part, so as to facilitate the position adjustment of the support assembly and the trigger part, and can achieve rapid adjustment of the hook structure between the trigger part and the moving part, so as to solve the problem of the hook structure getting stuck before the device is finalized. After the device is finalized, the device can be retained so that it can be adjusted according to the dimensional tolerances of the various components of the backup protection disconnector during product assembly, so as to avoid the relative position deviation between the trigger part and the moving part after assembly due to the dimensional tolerances of the various components, and the risk of the hook structure getting stuck, resulting in failure of the backup protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0019] Figure 1 This is a schematic diagram of the coordinated structure of the trigger assembly, hook assembly, and moving part of the backup protection device provided in the first and third embodiments of the present invention;

[0020] Figure 2 This is a schematic diagram of the coordination between the hook body and the channel structure on the moving member provided in the first embodiment of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the hook assembly and the cable provided in the first embodiment of the present invention;

[0022] Figure 4 This is a structural diagram of the support assembly provided in Example 1 of the present utility model;

[0023] Figure 5 This is a schematic structural diagram of the cooperation between the moving part and the grounding loop provided in the third embodiment of the present utility model.

[0024] Figure numbers: 1-moving part; 2-hook body; 3-trigger assembly; 4-abutment surface; 5-plate; 6-channel structure; 7-rod; 8-rotating shaft; 9-pull cable; 10-hook; 11-acting part; 12-bracket; 13-coil assembly; 14-permanent magnet; 15-hook body group; 16-electrode. DETAILED DESCRIPTION

[0025] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0026] Example 1

[0027] like Figures 1 to 4 A backup protection device shown is used for a surge protector, including a trigger component 3, a hook group 15 and a moving part 1 that can move along a first direction to disengage from two electrodes 16 on the ground circuit. The hook group 15 includes two hook parts 2, which are respectively located on both sides of the moving part 1 and abut against the moving part 1 to limit the movement of the moving part 1 under the action of the spring. The two hook parts 2 cooperate with the trigger component 3.

[0028] In order to solve the problem that the action side of the electromagnetic release cooperates with the moving part 1 through structural parts such as a hook body, and the lateral force of the hook body causes the moving part 1 to get stuck during movement, making it impossible to disconnect the ground circuit in time, the trigger component 3 in this scheme cooperates with the moving part 1 through the hook body group 15, and the two hook body parts 2 of the hook body group 15 are respectively located on both sides of the moving part 1. Under the action of the trigger component 3, they cooperate with each other and resist the moving part 1 to clamp the moving part 1, and generate a restraining force on the moving part 1 to overcome the spring elastic force. The trigger component 3 cooperates with the two hook body parts 2 of the hook body group 15, so that the two hook body parts 2 maintain a state of clamping the moving part 1, so that the moving part 1 contacts the electrodes 16 on both sides of the interval on the ground circuit to realize the conduction of the interval. Since the two hook parts 2 of the hook group 15 constrain the moving part 1 from both sides of the moving part 1, the forces between the hook parts 2 and the moving part 1 can be balanced with each other in the direction along which the hook parts 2 approach and cooperate with the moving part 1, thereby avoiding the hook part 2 on one side from exerting a force on the moving part 1 that causes the moving part 1 to deviate.

[0029] In an optional embodiment, a linkage assembly is provided between the two hook bodies 2 to enable the two hook bodies 2 to maintain consistent movement.

[0030] The function of the linkage assembly is to make the two hook bodies 2 have the same force when clamping the moving part 1. Since the two hook bodies 2 are provided with the force to overcome the spring force through the trigger assembly 3, it is necessary to ensure that the two hook bodies 2 have the same force when cooperating with the moving part 1. The linkage assembly in this scheme includes a cable 9, and the end of the rod 7 away from the moving part is connected to one end of the cable 9, that is, the two ends of the cable 9 are respectively connected to the hook body 2, and the trigger assembly 3 cooperates with the cable 9 to pull the cable 9 to keep it in a tensioned state, so that the hook bodies 2 at both ends of the cable 9 can cooperate with the moving part 1 under the pulling action of the cable 9.

[0031] In this solution, the cable 9 is bent so as to be in a tensioned state to provide a force to overcome the spring force of the movable part 1. Specifically, the trigger component 3 tensions the cable 9 by pulling the cable 9 in a direction away from the hook body 2 or winding the cable 9.

[0032] In an optional embodiment, the hook body group 15 includes two rods 7 that can rotate around the rotating shaft 8, and each rod 7 forms a hook body portion 2 at one end close to the moving part to form a clamp-shaped structure. The hook body portion 2 can rotate with the rod 7 until it disengages from the moving part 1.

[0033] Preferably, the two rods 7 rotate around a rotation axis 8 .

[0034] The two rods 7 are respectively connected to the backup protection device through a rotating shaft 8. The two rods 7 cross-coordinate to form a clamp structure. The hook body 2 located at the head end of the clamp structure, that is, the end of the rod 7 close to the moving part, cooperates to clamp the moving part 1; the tail end of the clamp structure, that is, the end of the rod 7 away from the moving part is connected to the cable 9, and the two rods 7 are connected by a cable 9. By pulling the cable 9, the two rods 7 rotate and drive the two hook bodies 2 to approach each other. The two hook bodies 2 are located on both sides of the moving part 1, and the two hook bodies 2 are close to cooperate with the moving part 1.

[0035] The trigger assembly 3 pulls the cable 9 away from the rod 7, causing the two rods 7 to rotate and drive the two hook bodies 2 toward each other until they mate with the moving member 1. When the trigger assembly 3 pulls the cable 9 to tighten it, the restraining force of the trigger assembly 3 is transmitted to the hook end via the cable 9 to overcome the elastic force of the spring. When the current flowing through the ground loop reaches the trigger threshold of the trigger assembly 3, the pulling force of the trigger assembly 3 on the cable 9 disappears, and the cable 9 cannot pull the rod 7, so that the hook end remains restrained on the moving member 1. The moving member 1 moves under the action of the spring and pushes away from the hook end that mates with it, causing the rod 7 to rotate in a direction opposite to the mating direction. The moving member 1 moves to disengage from the electrodes 16 on both sides of the gap on the ground loop, thereby disconnecting the ground loop. The two rods 7 rotate to their ends at the tail end of the clamp structure, that is, the end of the rod 7 away from the moving member gradually separates, and the cable 9 between the two tail ends is tightened again.

[0036] In an optional embodiment, a channel structure 6 is provided on the movable part 1, and the two hook bodies 2 extend into the channel structure 6 through the openings at both ends of the channel structure 6 respectively. The hook body 2 has an abutment surface 4 inclined relative to the first direction, and the abutment surface 4 abuts against the inner wall surface of the channel structure 6 near the opening.

[0037] When the lever 7 is in the unlocked position, the lever 7 is in the unlocked position, and the two levers 7 are in the unlocked position, so that the lever 7 is unlocked and the two levers 7 are unlocked.

[0038] In an optional embodiment, the inner wall surface of the channel structure 6 close to the opening is inclined relative to the first direction.

[0039] Preferably, the plate 5 where the inner wall surface of the channel structure 6 abuts against the hook body 2 is located is a cylindrical structure, and the outer annular surface of the plate 5 of the cylindrical structure abuts against the abutting surfaces 4 of the two hook bodies 2 respectively.

[0040] In an optional embodiment, the trigger assembly 3 includes an action member 11 and a support assembly. The action member 11 and the support assembly offset each other through the magnetic force generated by the support assembly. A hook 10 is provided on the action member 11. The hook 10 cooperates with the cable 9 to pull the cable 9 to cause bending.

[0041] The support assembly includes a bracket 12 and a coil assembly 13. The bracket 12 is C-shaped, with an opening on one side, and a first end and a second end on either side of the opening. A permanent magnet 14 is fixed to the bracket 12, which magnetizes the bracket 12 so that the first and second ends of the bracket 12 can attract the actuating member 11. The hook 10 on the actuating member 11 is hooked on the cable 9 and pulls the cable 9 away from the rod 7, causing the two rods 7 to rotate until the two hook portions 2 on them extend through the opening into the channel structure 6 of the moving member 1, constraining the moving member 1 along its direction of movement.

[0042] The coil assembly 13 includes a sleeve and a wire wound on the sleeve, the sleeve is sleeved on the bracket 12, and the wire is connected to the secondary side of the current transformer. The surge protector in this scheme is used for AC circuits, so the direction of the magnetic field generated by the coil assembly 13 changes with the current. When the direction of the magnetic field is opposite to the direction of the magnetic field generated by the permanent magnet 14, the magnetic field generated by the coil assembly 13 offsets the magnetic field generated by the permanent magnet 14 or the two offset and weaken it to the point where its suction force on the actuating part 11 is less than the force of the spring acting on the actuating part 11, so that the actuating part 11 is separated from the bracket 12. After separating from the bracket 12, the actuating part 11 cannot continue to provide pulling force to the cable 9, and thus the hook body 2 cannot overcome the elastic force of the spring on the moving part 1. Under the action of the moving part 1, the rod 7 rotates the hook body 2 to exit the channel structure 6, and the restraining force of the hook body 2 on the moving part 1 disappears.

[0043] Example 2

[0044] In an optional embodiment, the hook body group includes two rods that can rotate around a rotating axis, and each rod is provided with a hook body portion at one end close to the moving part to form a clamp-shaped structure. The hook body portion can rotate with the rod until it disengages from the moving part, and the linkage assembly includes two meshing gear parts, and each rod is provided with a coaxially rotating gear part.

[0045] The two rods are respectively connected to the backup protection device through a rotating shaft. The two rods cross-coordinate to form a clamp-shaped structure. The hook body located at the head end of the clamp-shaped structure, that is, the end of the rod close to the moving part, cooperates to clamp the moving part; each rod is provided with a coaxially rotating gear part, and the two gear parts are engaged, so that the rotation of one of the two rods will drive the rotation of the other, thereby ensuring the consistent rotation of the two rods.

[0046] The trigger assembly is engaged with the tail end of the clamp structure, that is, the end of one of the rods away from the moving part, through a cable. The trigger assembly pulls one of the rods in a direction away from the moving part, causing the hook portion on the rod to move closer to engage with the moving part. The other rod rotates accordingly under the action of the gear, and the hook portion on it also moves closer to engage with the moving part. The two hook portions clamp the moving part. When the trigger assembly pulls the cable to tighten it, the restraining force of the trigger assembly is transmitted to the hook end through the cable to overcome the elastic force of the spring. When the current flowing through the ground loop reaches the trigger threshold of the trigger assembly, the pulling force of the trigger assembly on the cable disappears, and the cable cannot pull the rod, so that the hook end maintains its restraint on the moving part. The moving part moves under the action of the spring and pushes away from the hook end that engages with it, causing the rod to rotate in a direction opposite to the engagement direction. During the rotation of the rod, the two rods remain consistent due to the meshing of the gears.

[0047] Example 3

[0048] like Figure 5 The surge protector shown includes a lightning protection component, wherein the lightning protection component and the moving part 1 in any of the above backup protection devices are arranged in series on the grounding circuit.

[0049] The lightning protection component includes a lightning protection element and a thermal release component. The surge protector has a grounding loop structure, such as a copper busbar, for connecting to an external cable through an interface or the like. The belt body and other components of the lightning protection element and the thermal release component are connected to the grounding loop structure. The two disconnected ends of the grounding loop structure are respectively provided with electrodes 16. The moving part 1 in the backup protection device is located between the two electrodes 16 and contacts the electrodes 16 on both sides of the interval on the grounding loop to realize the conduction of the two sections of the grounding loop structure. The action side of the trigger component 3 cooperates with the moving part 1 through structural components such as the hook group 15. The action side of the trigger component 3 constrains the moving part 1 through the hook group 15, so that the moving part 1 can overcome the elastic force of the spring and maintain contact with the electrodes 16 on both sides of the interval on the grounding loop. When the current flowing through the grounding loop reaches the trigger threshold of the trigger component 3, the constraining force of the action side of the trigger component 3 on the moving part 1 disappears, so that the moving part 1 moves under the action of the spring to separate from the electrodes 16 on both sides of the interval on the grounding loop, thereby disconnecting the grounding loop.

[0050] It should be noted that any of the above embodiments are illustrative of the present invention rather than limiting thereof, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words primary, secondary, previous, and next etc. does not indicate any order. These words may be interpreted as names.

[0051] The above embodiments are only suitable for illustrating the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims

1. A backup protection device for a surge protector, characterized in that: The invention comprises a trigger assembly (3), a hook assembly (15), and a moving member (1) capable of moving in a first direction to be separated from two electrodes (16) on a ground loop. The hook assembly (15) comprises two hook portions (2). The two hook portions (2) are respectively located on both sides of the moving member (1) and abut against the moving member (1), thereby limiting the movement of the moving member (1) under the action of a spring. The two hook portions (2) cooperate with the trigger assembly (3).

2. The backup protection device according to claim 1, characterized in that: A linkage assembly is provided between the two hook bodies (2) for enabling the two hook bodies (2) to maintain consistent movement.

3. The backup protection device according to claim 2, characterized in that: The hook body group (15) includes two rods (7) that can rotate around a rotating shaft (8), and each of the rods (7) forms the hook body part (2) at one end close to the moving part to form a clamp-shaped structure. The hook body part (2) can rotate with the rod (7) until it is disengaged from the moving part (1). The linkage component includes a cable (9), and the end of the rod (7) away from the moving part is connected to one end of the cable (9). The trigger component (3) cooperates with the cable (9) to cause the cable (9) to bend.

4. The backup protection device according to claim 3, characterized in that: The two rods (7) rotate around a rotating shaft (8).

5. The backup protection device according to claim 2, characterized in that: The hook assembly (15) comprises two rods (7) capable of rotating around a rotating shaft (8), and each rod (7) is provided with a hook portion (2) at one end close to the moving member to form a clamp-shaped structure. The hook portion (2) can rotate with the rod (7) until it is disengaged from the moving member (1). The linkage assembly comprises two meshing gear members, and each rod (7) is provided with a coaxially rotating gear member.

6. The backup protection device according to claim 5, characterized in that: An end of at least one of the rods (7) away from the moving member is connected to the trigger assembly (3) via a cable (9).

7. The backup protection device according to claim 1, characterized in that: The movable member (1) is provided with a channel structure (6), and the two hook bodies (2) extend into the channel structure (6) through openings at both ends of the channel structure (6), respectively. The hook body (2) has an abutment surface (4) arranged obliquely relative to a first direction, and the abutment surface (4) abuts against an inner wall surface of the channel structure (6) near the opening.

8. The backup protection device according to claim 7, characterized in that: The inner wall surface of the channel structure (6) close to the opening is arranged to be inclined relative to the first direction.

9. The backup protection device according to claim 3, characterized in that: The trigger assembly (3) comprises an action member (11) and a support assembly, wherein the action member (11) and the support assembly counteract each other through the magnetic force generated by the support assembly, and a hook (10) is provided on the action member (11), and the hook (10) cooperates with the cable (9) to pull the cable (9) to bend.

10. A surge protector, comprising a lightning protection component, characterized in that: The lightning protection component and the moving part (1) in the backup protection device according to any one of claims 1 to 9 are arranged in series on a grounding loop.

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