Large-flow surge protector

Abstract

The utility model provides a large-flow surge protector, which comprises an inner shell, a swing arm and a conducting strip, the swing arm and the conducting strip are arranged in the inner shell, a plug-in structure is arranged between the swing arm and the conducting strip, the plug-in structure comprises a plug-in block arranged on the swing arm and a connecting block arranged on the conducting strip, and the plug-in block is connected with the connecting block. The connecting block is provided with an inserting groove for the inserting block to be inserted in, the contact area of the swing arm and the connecting block is 20-60 mm < 2 >, and the surge protector can improve the through flow of a product.

Description

Technical Field

[0001] The utility model relates to the technical field of surge protectors, and particularly relates to a large-current surge protector. Background Art

[0002] A surge protector, also known as a lightning arrester or a surge suppressor, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or a communication line due to external interference, the surge protector can conduct and shunt the current in an extremely short time, thereby avoiding damage to other devices in the circuit. In the prior art, in the patent with the publication number CN218850399U, a miniaturized high-energy surge protector is disclosed, which includes an inner shell, a swing arm arranged inside the inner shell, and a conductive sheet that can be welded to the swing arm. A spring is connected to the swing arm. However, due to the small contact area between the swing arm and the conductive sheet, when the current-carrying capacity is insufficient, the contact area between the connecting block and the swing arm cannot pass a large amount of current in a short time, resulting in the accumulation of current at the connection, and the heat generated by the current causes the solder joint to become desoldered, ultimately causing the circuit to stop running. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the present utility model is to overcome the defect that the solder joint will become desoldered when the current-carrying capacity between the swing arm and the conductive sheet generally fails to meet the product parameter requirements in the prior art, so as to provide a large-current surge protector that can increase the current-carrying capacity.

[0004] To this end, the present utility model provides a large-current surge protector, which includes an inner shell, a swing arm arranged inside the inner shell, and a conductive sheet. An insertion structure is arranged between the swing arm and the conductive sheet. The insertion structure includes an insertion block arranged on the swing arm and a connection block opened on the conductive sheet. An insertion slot for inserting the insertion block is opened on the connection block. The contact area between the swing arm and the connection block is 20mm 2 -60mm 2 .

[0005] Further: The inner shell further includes a pin. The swing arm includes a main body, a connection part arranged on one side of the main body, and an insertion part arranged on the other side. The insertion block is arranged on the connection part. The insertion part is sleeved outside the pin, and the insertion part is arranged in a "V" shape.

[0006] Further: A connecting plate for connecting the two is arranged between the main body and the insertion part. The width of the connecting plate is 2mm - 7mm.

[0007] Further: A positioning column for inserting into the inner shell is further arranged at the connecting plate. The width between the positioning column and the connecting plate is not less than 3mm.

[0008] Further: The width of the body is 2 mm - 5 mm.

[0009] Further: The plug-in part includes a connection end, a bending end and an arc end arranged in a "V" - shaped structure. The distance between the connection end and the bending end gradually increases from the side close to the arc end to the side far from the arc end, and the distance is 1 mm - 5 mm.

[0010] Further: An indicator board connected to the swing arm is also arranged inside the inner shell. An indicator block for indicating the working state of the surge protector is arranged on the indicator board. The indicator block is arranged at a position close to the end of the indicator board. An arc - shaped channel for assisting the movement of the indicator block is arranged on the inner shell.

[0011] Further: There is a shell outside the inner shell. A hinge shaft is arranged between the indicator board and the inner shell. A convex ring abutted against the inner side wall of the shell is arranged on the hinge shaft. A convex point abutted against the side wall of the inner shell is arranged on the side of the indicator board facing away from the convex ring. A convex strip is arranged at the position where the inner shell contacts the swing arm.

[0012] Further: A gripping plate for finger gripping is arranged on the outer end face of the shell. Anti - slip strips are arranged on the gripping plate.

[0013] The technical solution of the utility model has the following advantages:

[0014] 1. For a large - flow surge protector provided by the utility model, a plug - in block and a connection block are added between the swing arm and the conductive sheet. A plug - in slot for inserting the plug - in block is arranged on the connection block. During installation, the plug - in block is inserted into the plug - in slot, and then solder is welded at the plug - in structure. And through the insertion - setting of the plug - in block and the plug - in slot, according to the national standard GB / T 18802.11 - 2020, the performance of the surge protector is tested. In the prior art, when the contact area between the connection block and the swing arm is small, the through - flow capacity is small. The contact area between the connection block and the swing arm cannot pass a large amount of current in a short time, resulting in the accumulation of current at the connection, resulting in desoldering, so that the 60 kA current strike test cannot be passed, and thus the national standard cannot be met. To solve this technical problem, by increasing the area of the connection block, the contact area between the swing arm and the connection block is increased. When the contact area between the connection block and the swing arm is enlarged, its through - flow capacity will also increase, enabling the current to pass through fully, so that the surge protector can withstand the 60 kA current strike test and meet the national standard.

[0015] 2. The large-current surge protector provided by the present utility model, the inner shell further includes pins, the swing arm includes a body, a connecting portion and a plugging portion, the pins are located on the inner shell, the plugging portion is wrapped outside the pins, and is arranged in a "V" shape through the plugging portion. When the inner shell is inserted into the outer shell connected thereto, it can play a guiding role. In the prior art, due to the too small area of the connecting portion, during use, due to the too large current, the connecting portion and the plugging portion are broken. However, in this embodiment, the connecting area between the connecting portion and the plugging portion is increased, so that a larger current can pass through conveniently and effectively prevent it from breaking during use. Brief Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the surge protector;

[0018] Figure 2 It is a schematic diagram of the back structure of the surge protector;

[0019] Figure 3 It is a schematic diagram of the structure of the surge protector after removing the indicator board;

[0020] Figure 4 It is a schematic diagram of the structure of the swing arm;

[0021] Figure 5 It is a schematic diagram of the back structure of the indicator board;

[0022] Figure 6 It is a schematic diagram of the connection structure between the housing and the inner shell.

[0023] Figure 7 It is a schematic diagram of the overall structure of the housing and the inner shell.

[0024] Explanation of the reference numerals:

[0025] 1. Inner shell; 2. Swing arm; 21. Body; 22. Connecting part; 23. Inserting part; 3. Conductive sheet; 4. Inserting structure; 41. Inserting block; 42. Connecting block; 43. Inserting groove; 5. Pin; 51. Connecting end; 52. Bent end; 53. Arc end; 6. Connecting plate; 7. Positioning post; 8. Indicator board; 81. Indicator block; 82. Arc channel; 9. Hinge shaft; 90. Housing; 91. Convex ring; 92. Convex point; 93. Convex strip; 94. First reinforcing rib; 95. Second reinforcing rib; 96. Extension rib; 97. Grasping plate; 98. Anti-slip strip. Detailed implementation manners

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Embodiment

[0031] This embodiment provides a large-current surge protector, which includes an inner shell 1, a swing arm 2 and a conductive sheet 3 arranged inside the inner shell 1. An insertion structure 4 is arranged between the swing arm 2 and the conductive sheet 3. The insertion structure 4 includes an insertion block 41 arranged on the swing arm 2 and a connection block 42 opened on the conductive sheet 3. An insertion slot 43 for inserting the insertion block 41 is opened on the connection block 42. The contact area between the swing arm 2 and the connection block 42 is 20mm 2 -60mm 2 .

[0032] The above specific improvement is as follows: As Figure 1 and Figure 4 shown, compared with the prior art, an insertion block 41 and a connection block 42 are added between the swing arm 2 and the conductive sheet 3. An insertion slot 43 for inserting the insertion block 41 is arranged on the connection block 42. During installation, the insertion block 41 is inserted into the insertion slot 43, and then the solder is welded at the insertion structure 4. And through the insertion setting of the insertion block 41 and the insertion slot 43, according to the national standard GB / T 18802.11-2020, the performance of the surge protector is tested. In the prior art, when the contact area between the connection block 42 and the swing arm 2 is small, the through-current is small, and the connection block 42 and the swing arm 2 cannot pass a large amount of current in a short time, resulting in the accumulation of current at the connection, and the heat generated by the current causes the solder to de-solder, so that the 60kA current strike test cannot be passed, and thus the national standard cannot be met. To solve this technical problem, by increasing the area of the connection block 42, the contact area between the swing arm 2 and the connection block 42 is increased. When the contact area between the connection block 42 and the swing arm 2 is enlarged, its through-current will also increase, enabling the current to pass through sufficiently, so that the surge protector can withstand the 60kA current strike test and meet the national standard. In this embodiment, the solder is welded by using a 145° low-temperature solder. Preferably, the length of the connection block 42 can be set to 8.5mm, and the width can be set to 3.6mm.

[0033] On the basis of the above embodiment: The inner shell 1 further includes a pin 5. The swing arm 2 includes a main body 21, a connection part 22 arranged on one side of the main body 21, and an insertion part 23 arranged on the other side. The insertion block 41 is arranged on the connection part 22. The insertion part 23 is sleeved outside the pin 5, and the insertion part 23 is arranged in a "V" shape.

[0034] The above specific improvement is as follows: As Figure 2 and Figure 3As shown, the inner shell 1 further includes pins 5. The swing arm 2 includes a body 21, a connecting portion 22, and a plugging portion 23. The pins 5 are located on the inner shell 1, and the plugging portion 23 is wrapped around the outside of the pins 5. The plugging portion 23 is arranged in a "V" shape, which can play a guiding role when the inner shell 1 is inserted into the outer shell connected thereto. In the prior art, due to the too small area of the connecting portion 22, during use, the connecting portion 22 and the plugging portion 23 are broken due to too large current. However, in this embodiment, the connecting area between the connecting portion 22 and the plugging portion 23 is increased, so that a larger current can pass through conveniently and effectively prevent it from breaking during use.

[0035] Based on the above embodiment: A connecting plate 6 for connecting the two is provided between the body 21 and the plugging portion 23, and the width of the connecting plate 6 is 2 mm - 7 mm.

[0036] The above specific improvement is: As Figure 4 shown, in order to increase the connection surface between the connecting portion 22 and the plugging portion 23, a connecting plate 6 is added between the connecting portion 22 and the plugging portion 23. Preferably, the width of the connecting plate 6 can be 4.5 mm.

[0037] Based on the above embodiment: A positioning post 7 for inserting into the inner shell 1 is further provided at the connecting plate 6, and the width between the positioning post 7 and the connecting plate 6 is not less than 3 mm.

[0038] Based on the above embodiment: The width of the body 21 is 2 mm - 5 mm.

[0039] The above specific improvement is: As Figure 4 shown, through the arrangement of the positioning post 7, the positioning post 7 can be inserted into the groove of the inner shell 1. Compared with the prior art, the widths of the positioning post 7, the connecting plate 6, and the body 21 are increased to facilitate the passage of large current. Preferably, the width distance between the positioning post 7 and the connecting plate 6 is 13 mm, and the width of the body 21 is 3.1 mm.

[0040] Based on the above embodiment: The plugging portion 23 includes a connecting end 51, a bending end 52 arranged in a "V" shape, and an arc end 53 arranged between the two. The distance between the connecting end 51 and the bending end 52 gradually increases from the side close to the arc end 53 to the side away from the arc end 53, and the distance is 1 mm - 5 mm.

[0041] The above specific improvement is: As Figure 2 and Figure 3 shown, the plugging portion 23 includes a connecting end 51, a bending end 52, and an arc end 53 arranged between the two. When the plugging portion 23 is inserted into the outer shell, through the inclined structure arrangement of the connecting end 51 and the bending end 52, it is convenient for plugging and unplugging.

[0042] On the basis of the above embodiments: An indicating plate 8 connected to the swing arm 2 is further disposed inside the inner shell 1. An indicating block 81 for indicating the working state of the surge protector is disposed on the indicating plate 8. The indicating block 81 is disposed at a position near the end of the indicating plate 8. An arc-shaped channel 82 for assisting the movement of the indicating block 81 is disposed on the inner shell 1.

[0043] The above specific improvement is as follows: As Figure 2 shown, an indicating plate 8 is disposed inside the inner shell 1. The indicating plate 8 is linked with the swing arm 2. After the welding between the plugging structures 4 is broken, the swing arm 2 will swing. At the same time, the indicating plate 8 will be further driven by the elastic force of the spring itself to swing a greater amplitude. The indicating block 81 is disposed at a position near the end of the indicating plate 8. In the prior art, a shell is further sleeved outside the inner shell 1. Data is printed on the upper part of the shell. The shell has a display surface, and the indicating block 81 is located at the middle position of the display surface, resulting in that the data can only be printed on the upper and lower sides of the display surface avoiding the position of the indicating block 81. However, in this embodiment, the indicating block 81 is located at the top or bottom position of the display surface, so that the data can be concentratedly printed in one place, making the entire display surface more beautiful. Through the setting of the arc-shaped channel 82, the swing of the indicating block 81 can be effectively assisted.

[0044] On the basis of the above embodiments: A shell is disposed outside the inner shell 1. A hinge shaft 9 is disposed between the indicating plate 8 and the inner shell 1. A convex ring 91 abutted against the inner side wall of the shell is disposed on the hinge shaft 9. A convex point 92 abutted against the side wall of the inner shell 1 is disposed on the side of the indicating plate 8 facing away from the convex ring 91. A convex strip 93 is disposed at the position where the inner shell 1 contacts the swing arm 2.

[0045] The above specific improvement is as follows: As Figure 5 shown, the hinge shaft 9 is disposed on the indicating plate 8. When the swing arm 2 is de-welded, the swing arm 2 swings, thereby driving the indicating plate 8 to swing along the hinge shaft 9. The convex ring 91 on the hinge shaft 9 contacts the shell, so that a gap exists between the indicating plate 8 and the outer shell, reducing the contact friction between the indicating plate 8 and the outer shell during the rotation process. Through the setting of the convex point 92, the contact friction between the indicating plate 8 and the inner shell 1 during the rotation process is reduced. Through the setting of the convex strip 93, the contact friction between the indicating plate 8 and the inner wall of the inner shell 1 during the rotation process can be reduced.

[0046] On the basis of the above embodiments: First reinforcing ribs 94 and second reinforcing ribs 95 abutted against the inner shell 1 to prevent the side wall of the inner shell 1 from being recessed inward are disposed on the shell 90. An extension rib 96 for preventing the side wall of the shell 90 from breaking is further disposed on the inner wall of the shell 90.

[0047] The above specific improvement is as follows: As Figure 6As shown, a base is externally connected to the housing 90. The housing 90 needs to be inserted into the base. To prevent deformation of the side wall of the housing 90, a first reinforcing rib 94 and a second reinforcing rib 95 are provided on the inner side wall of the housing 90 in a boss structure. The first reinforcing rib 94 is in interference fit with the side wall of the inner shell 1, thereby providing an outward thrust to the side wall of the housing 90, effectively alleviating the problem of deformation of the inner side wall of the housing 90 due to its excessive length. The inner shell 1 has a buckle, and this buckle will snap into the card slot of the housing 90 (this is the prior art). When the buckle snaps into the card slot, the side wall of the housing 90 will form a jolt. When the thickness of the side wall of the housing 90 is too thin, it is easy to cause the side wall to break. To solve this technical problem, an extension rib 96 is provided at the position of the card slot on the side wall of the housing 90 to strengthen the strength of the side wall, effectively preventing the side wall from breaking when the buckle snaps into the card slot.

[0048] Based on the above embodiment: A gripping plate 97 for finger gripping is provided on the outer end face of the housing 90, and anti-slip strips 98 are provided on the gripping plate.

[0049] The above specific improvement is as follows: As Figure 7 shown, when installing the housing 90, the operator needs to hold the gripping plate 97 with the hand. To increase the friction between the hand and the housing 90, a clamping block that is clamped to the base is provided on the gripping plate 97. When it is necessary to remove the housing 90, the gripping plate 97 needs to be pressed to separate the clamping block from the base. A plurality of anti-slip strips 98 are provided on the gripping plate 97, and the English word "push" with the Chinese meaning of "press" is printed on the anti-slip strips 98, which is used to prompt the operator to push the housing 90 into the base when installing the housing 90. And the gripping plate 97 is arranged in a semi-circular shape with a thin middle and thick sides, which is convenient for the operator to press. And when the clamping block is clamped to the base, the middle is concave, and the two sides will deform in the opposite direction during injection molding, so as to protrude outward, making the clamping block clamp deeper when clamping.

[0050] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A large-flow surge protector, characterized in that: It includes an inner shell (1), a swing arm (2) and a conductive sheet (3) arranged inside the inner shell (1), and is characterized in that: an insertion structure (4) is arranged between the swing arm (2) and the conductive sheet (3), and the insertion structure (4) includes an insertion block (41) arranged on the swing arm (2) and a connection block (42) opened on the conductive sheet (3), and the contact area between the swing arm (2) and the connection block (42) is 20mm 2 -60mm 2 , a plugging groove (43) for inserting the plugging block (41) is opened on the connection block (42), the inner shell (1) further includes a pin (5), the swing arm (2) includes a main body (21), a connection part (22) arranged on one side of the main body (21) and a plugging part (23) arranged on the other side, the plugging block (41) is arranged on the connection part (22), the plugging part (23) is sleeved outside the pin (5), and the plugging part (23) is arranged in a "V" - shaped structure.

2. The large-flow surge protector according to claim 1, characterized in that: A connecting plate (6) for connecting the body (21) and the plugging part (23) is arranged therebetween, and the width of the connecting plate (6) is 2 mm - 7 mm.

3. The large-flow surge protector according to claim 2, wherein: A positioning post (7) for inserting into the inner shell (1) is further arranged at the connecting plate (6), and the width between the positioning post (7) and the connecting plate (6) is not less than 3 mm.

4. The large-flow surge protector according to claim 3, characterized in that: The width of the body (21) is 2 mm - 5 mm.

5. A large-flow surge protector according to claim 1, characterized in that: The plugging part (23) includes a connecting end (51), a bent end (52) arranged in a "V" - shaped structure, and an arc - shaped end (53) arranged between the two. The distance between the connecting end (51) and the bent end (52) gradually increases from the side close to the arc - shaped end (53) to the side far from the arc - shaped end (53), and the distance is 1 mm - 5 mm.

6. A large-flow surge protector according to any one of claims 1-5, characterized in that: An indicating board (8) connected to the swing arm (2) is further arranged inside the inner shell (1). An indicating block (81) for indicating the working state of the surge protector is arranged on the indicating board (8). The indicating block (81) is arranged at a position close to the end of the indicating board (8). An arc - shaped channel (82) for assisting the movement of the indicating block (81) is arranged on the inner shell (1).

7. The large-flow surge protector according to claim 6, characterized in that: A housing (90) is arranged outside the inner shell (1). A hinge shaft (9) is arranged between the indicating board (8) and the inner shell (1). A convex ring (91) abutted against the inner side wall of the housing is arranged on the hinge shaft (9). A convex point (92) abutted against the side wall of the inner shell (1) is arranged on the side of the indicating board (8) facing away from the convex ring (91). A convex rib (93) is arranged at the position where the inner shell (1) contacts the swing arm (2).

8. The large-flow surge protector according to claim 7, characterized in that: A first reinforcing rib (94) and a second reinforcing rib (95) which are abutted against the inner shell (1) to prevent the side wall of the inner shell (1) from being sunken inward are arranged on the housing (90). An extending rib (96) for preventing the side wall of the housing (90) from being broken is further arranged on the inner wall of the housing (90).

9. The large-flow surge protector according to claim 8, characterized in that: A gripping plate (97) for finger - gripping is arranged on the outer end face of the housing (90), and anti - slip stripes (98) are arranged on the gripping plate.

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