PCB onboard T1+T2 type lightning protection module

Abstract

The utility model provides a PCB onboard T1 + T2 type lightning protection module, which is characterized in that the front surface of a pressure-sensitive assembly (7) is provided with a pressure-sensitive electrode A (14), the pressure-sensitive electrode A (14) is provided with a tripping pin (6), and the tripping pin (6) penetrates through an inner shell (2) and is connected with a tripping electrode (3); the tripping pin (6) is provided with a jack (19). An insertion sheet (20) is arranged on the tripping electrode (3); the tripping electrode (3) is provided with an insertion piece (20) which is inserted into an insertion hole (19) in the tripping pin (6), and the insertion positions are connected through tin soldering to form a tripping point. According to the utility model, larger current conduction can be supported, the non-fault fusing condition under large current can be avoided, and the connection firmness can be ensured when overcurrent and overheating conditions do not occur.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical protection, in particular to a PCB board-mounted T1+T2 type lightning protection module. Background Art

[0002] Surge protection is the process of preventing a surge in a circuit from damaging the insulation of electronic equipment when the surge exceeds the normal operating voltage of the electronic equipment on the circuit, causing the charge on the circuit to discharge along an abnormal path, resulting in overcurrent, short circuit, and other phenomena inside the electronic equipment, ultimately leading to damage to the electronic equipment.

[0003] Patent CN 221328597 U discloses a new photovoltaic PCB-type power surge protector, which features a trip point formed by welding a trip spring to a trip point. With the development of the photovoltaic, communications, and energy storage industries, the current requirements for lightning protection modules are becoming increasingly stringent. Current requirements include T1 (10 / 350µS) Iimp: 6.5kA, T2 (8 / 20µS) Imax: 40kA, and a maximum voltage of 1100V for varistor components.

[0004] In order to ensure the safety of the lightning protection module in the existing technology when it is subjected to large through-current, larger-sized electrode sheets or copper wires must be used. In the existing technology, directly increasing the conduction area will make it difficult to fix the trip point firmly, and it is easy to trip due to lightning shock. In addition, under large through-current, the operating temperature of the device is higher, and it is easy to cause non-fault melting due to normal heating.

[0005] Based on this, the present application proposes a compatible lightning protection module that can avoid non-fault fusing when used with large current. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a PCB board-mounted T1+T2 type lightning protection module, which is specifically achieved through the following technical solutions:

[0007] A PCB-mounted T1+T2 lightning protection module comprises an outer shell, an inner shell, a sliding block, and a pressure-sensitive component; the sliding block is movably arranged on the front face of the inner shell; the outer shell cover is arranged outside the inner shell, the sliding block, and the pressure-sensitive component, and is characterized in that:

[0008] The pressure-sensitive component is mounted and fixed on the back of the inner shell. The front of the pressure-sensitive component is provided with a pressure-sensitive electrode A, and the back is provided with a pressure-sensitive electrode B. The pressure-sensitive electrode A is provided with a trip pin. The trip pin passes through the inner shell and is connected to the trip electrode. The pressure-sensitive electrode B is connected to pin B.

[0009] The tripping pin is provided with a socket, the tripping electrode is provided with a plug, the plug is inserted into the socket of the tripping pin, and the plug and the socket are connected by soldering to form a tripping point.

[0010] The tripping electrode is arranged on the sliding block and can slide synchronously with the sliding block.

[0011] Optionally or preferably, the sliding block is provided with a mounting groove for mounting the tripping electrode, the upper end and the lower end of the tripping electrode are provided with buckling pieces, and the tripping electrode is mounted in the mounting groove through the buckling pieces.

[0012] Optionally or preferably, the device further comprises a spring A and a spring B, the spring A and the spring B are arranged side by side and located above and below the tripping electrode respectively, one end of the spring A and the spring B is connected with the inner shell, and the other end is connected with the sliding block, so that the sliding block can slide away after the tripping point is fused, thereby separating the tripping pin from the tripping electrode.

[0013] Optionally or preferably, the device further comprises a remote signaling pin B and a remote signaling pin A, the remote signaling pin B and the remote signaling pin A are arranged at the lower part of the inner shell, when the tripping pin is not disconnected from the tripping electrode, the remote signaling pin B and the remote signaling pin A are pressed and connected with each other by the sliding block, and when the tripping pin is disconnected from the tripping electrode, the sliding block slides away and no longer presses the remote signaling pin B and the remote signaling pin A, so that the remote signaling pin B and the remote signaling pin A are separated from each other.

[0014] Optionally or preferably, the inner shell is provided with a guide mechanism matched with the sliding block, so that the sliding block can slide horizontally after the tripping pin is disconnected from the tripping electrode, and will not fall off or be stuck.

[0015] Optionally or preferably, the outer shell is provided with an alarm window, and the sliding block has a conspicuous feature, so that a user can see the sliding block from the alarm window and determine whether the tripping pin is disconnected from the tripping electrode.

[0016] Optionally or preferably, the device further comprises two reinforcing blocks, the reinforcing blocks are arranged on the sliding block near the tripping electrode, and the reinforcing blocks provide lateral support for the spring A and the spring B.

[0017] Based on the above technical scheme, the PCB-mounted T1+T2 type lightning protection module provided by the utility model can produce the following technical effects:

[0018] (1) The utility model satisfies the use requirements of T1 (10 / 350uS) Iimp: 6.5kA, T2 (8 / 20uS) Imax: 40kA, and the voltage of the pressure-sensitive component is up to 1100V.

[0019] (2) The tripping point composed of the tripping electrode and the tripping pin in the present invention is connected by a through-welding structure. Compared with the existing technology, the connection is more firm and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram (external stereogram) of the utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the utility model (before tripping);

[0023] Figure 3 This is a schematic diagram of the internal structure of the utility model (after tripping);

[0024] Figure 4 This is an exploded view of the pressure-sensitive component in the present utility model;

[0025] Figure 5 This is an exploded view of the present invention (housing not shown);

[0026] Figure 6 It is a structural diagram of the tripping electrode in the utility model;

[0027] Description of the accompanying drawings:

[0028] 1-Outer shell, 2-Inner shell, 3-Trip electrode, 4-Pin B, 5-Sliding block, 6-Trip pin, 7-Pressure-sensitive component, 8-Pin A, 9-Remote signal pin B, 10-Remote signal pin A, 11-Spring A, 12-Spring B, 13-Alarm window, 14-Pressure-sensitive electrode A, 15-Pressure-sensitive electrode B, 16-Copper braid, 17-Mounting slot, 18-Guide mechanism, 19-Jack, 20-Plug, 21-Snap piece, 22-Reinforcement block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] In a preferred embodiment:

[0031] This embodiment provides a PCB board-mounted T1+T2 type lightning protection module, such as Figure 1 and Figure 5 As shown,

[0032] The device comprises an outer shell 1, an inner shell 2, a sliding block 5, and a pressure-sensitive component 7; the sliding block 5 is movably arranged on the front of the inner shell 2; the outer shell 1 is arranged to cover the outer portion of the inner shell 2, the sliding block 5, and the pressure-sensitive component 7, and is characterized in that:

[0033] like Figure 4 As shown, the pressure-sensitive component 7 is mounted and fixed on the back of the inner shell 2. The front of the pressure-sensitive component 7 is provided with a pressure-sensitive electrode A14, and the back is provided with a pressure-sensitive electrode B15. The pressure-sensitive electrode A14 is provided with a trip pin 6. The trip pin 6 passes through the inner shell 2 and is connected to the trip electrode 3. The pressure-sensitive electrode B15 is connected to the pin B4.

[0034] The trip pin 6 is provided with a socket 19; the trip electrode 3 is provided with a plug 20; the plug 20 provided on the trip electrode 3 is inserted into the socket 19 on the trip pin 6, and the plug is connected by soldering to form a trip point;

[0035] The tripping electrode 3 is mounted on the sliding block 5 and can slide synchronously with the sliding block 5 ; the tripping electrode 3 is also connected to the pin A8 via a copper braid 16 .

[0036] Furthermore, in this embodiment, Figure 6 As shown, the sliding block 5 is provided with a mounting groove 17 for mounting the tripping electrode 3 ; the upper and lower ends of the tripping electrode 3 are both provided with snap pieces 21 ; the tripping electrode 3 is mounted and engaged in the mounting groove 17 through the snap pieces 21 .

[0037] Furthermore, in this embodiment, a spring A11 and a spring B12 are further included; the spring A11 and the spring B12 are arranged side by side, respectively located above and below the trip electrode 3; one end of the spring A11 and the spring B12 are both connected to the inner shell 2, and the other end is connected to the sliding block 5, so that the sliding block 5 can slide away after the trip point is melted, thereby separating the trip pin 6 from the trip electrode 3.

[0038] Further, in the embodiment, remote signaling pin B9 and remote signaling pin A10 are also included; the remote signaling pin B9 and the remote signaling pin A10 are arranged at the lower part of the inner shell 2, and when the tripping pin 6 is not disconnected from the tripping electrode 3, the remote signaling pin B9 and the remote signaling pin A10 are pressed and connected to each other by the sliding block 5; when the tripping pin 6 is disconnected from the tripping electrode 3, the sliding block 5 slides away and no longer presses the remote signaling pin B9 and the remote signaling pin A10, and the remote signaling pin B9 and the remote signaling pin A10 are separated from each other.

[0039] Further, in the embodiment, the inner shell 2 is provided with a guide mechanism 18 matched with the sliding block 5, so that the sliding block 5 can slide horizontally after the tripping pin 6 is disconnected from the tripping electrode 3, and will not fall off or be stuck.

[0040] Further, in the embodiment, the outer shell 1 is provided with an alarm window 13, and the sliding block 5 has a conspicuous feature, so that the user can see the sliding block 5 from the alarm window 13, and thus determine whether the tripping pin 6 is disconnected from the tripping electrode 3.

[0041] Further, in the embodiment, the outer shell 1 is provided with an alarm window 13, and the sliding block 5 is provided with a conspicuous color, so that the user can see the sliding block 5 from the alarm window 13, and thus determine whether the tripping pin 6 is disconnected from the tripping electrode 3; after the sliding block 5 moves, the user can know it by checking the alarm window 13, and thus replace it in time.

[0042] Further, in the embodiment, the outer shell 1 is provided with an alarm window 13, and the sliding block 5 is provided with a conspicuous color, so that the user can see the sliding block 5 from the alarm window 13, and thus determine whether the tripping pin 6 is disconnected from the tripping electrode 3; after the sliding block 5 moves, the user can know it by checking the alarm window 13, and thus replace it in time.

[0043] The working principle of the embodiment is as follows:

[0044] In normal operation, the sliding block 5 is located at the position as shown in FIG. 4, and when the connection between the tripping pin 6 and the tripping electrode 3 is not fused, the remote signaling pin B9 and the remote signaling pin A10 are buckled to each other under the pressure of the sliding block 5. Figure 2 Since the tripping pin 6 extends from the pressure-sensitive electrode A7 and is not directly attached to the pressure-sensitive assembly 7, the tripping pin 6 is less affected by the heat of the pressure-sensitive assembly 7, and can support a larger conduction current; and the tripping pin 6 and the tripping electrode 3 are connected by through-welding, which can ensure the firmness of the connection when there is no overcurrent overheating.

[0045] When overcurrent and overheating faults occur, the low-temperature tin soldering connection between the tripping pin 6 and the tripping electrode 3 will be fused, and the sliding block 5 will move to the position as shown in FIG. 5 under the action of the spring A11 and the spring B12. Figure 3The position shown in the figure drives the trip electrode 3 and the trip pin 6 to separate in a straight line, achieving the maximum distance separation in the minimum space, avoiding the adhesion and conduction of the chemical liquid. At the same time, this separation method enables the trip electrode 3 and the trip pin 6 to be welded with a larger area, further meeting the large flow demand.

[0046] When the sliding block 5 is in the position Figure 3 When in the position shown, the remote signal pin B9 and the remote signal pin A10 will no longer be restricted by the sliding block 5, the remote signal pin A10 will be lifted by the step of the inner shell 2, the remote signal pin B9 and the remote signal pin A10 will be separated, thereby issuing a remote signal alarm.

[0047] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention shall be within the scope of protection of the appended claims.

Claims

1. A PCB-mounted T1+T2 type lightning protection module, comprising an outer shell (1), an inner shell (2), a sliding block (5), and a pressure-sensitive component (7); the sliding block (5) is movably arranged on the front of the inner shell (2); the outer shell (1) is covered on the outside of the inner shell (2), the sliding block (5), and the pressure-sensitive component (7), characterized in that: The pressure-sensitive component (7) is mounted and fixed on the back of the inner shell (2); the front of the pressure-sensitive component (7) is provided with a pressure-sensitive electrode A (14), and the back is provided with a pressure-sensitive electrode B (15); the pressure-sensitive electrode A (14) is provided with a trip pin (6); the trip pin (6) passes through the inner shell (2) and is connected to the trip electrode (3); the pressure-sensitive electrode B (15) is connected to the pin B (4); The trip pin (6) is provided with a socket (19); the trip electrode (3) is provided with an insert (20); the insert (20) provided on the trip electrode (3) is inserted into the socket (19) on the trip pin (6), and the inserting portion is connected by soldering to form a trip point; The tripping electrode (3) is mounted on the sliding block (5) and can slide synchronously with the sliding block (5); the tripping electrode (3) is also connected to the pin A (8) via a copper braid (16).

2. The PCB-mounted T1+T2 lightning protection module according to claim 1, characterized in that: The sliding block (5) is provided with a mounting groove (17) for mounting a tripping electrode (3); the upper end and the lower end of the tripping electrode (3) are both provided with snap-fit ​​pieces (21); the tripping electrode (3) is mounted and engaged in the mounting groove (17) via the snap-fit ​​pieces (21).

3. The PCB-mounted T1+T2 lightning protection module according to claim 2, characterized in that: The invention also includes a spring A (11) and a spring B (12); the spring A (11) and the spring B (12) are arranged side by side and are respectively located above and below the tripping electrode (3); one end of the spring A (11) and the spring B (12) are connected to the inner shell (2), and the other end is connected to the sliding block (5), so that the sliding block (5) can slide away after the tripping point is melted, thereby separating the tripping pin (6) from the tripping electrode (3).

4. The PCB-mounted T1+T2 lightning protection module according to claim 1, characterized in that: The invention also includes a remote signal pin B (9) and a remote signal pin A (10); the remote signal pin B (9) and the remote signal pin A (10) are arranged at the lower part of the inner shell (2); when the trip pin (6) and the trip electrode (3) are not disconnected, the remote signal pin B (9) and the remote signal pin A (10) are squeezed by the sliding block (5) and are pressed and connected to each other; when the trip pin (6) and the trip electrode (3) are disconnected, the sliding block (5) slides away and no longer squeezes the remote signal pin B (9) and the remote signal pin A (10), and the remote signal pin B (9) and the remote signal pin A (10) are separated from each other.

5. The PCB-mounted T1+T2 lightning protection module according to claim 1, characterized in that: The inner shell (2) is provided with a guide mechanism (18) that matches the sliding block (5), so that the sliding block (5) can maintain horizontal sliding after the tripping pin (6) is tripped from the tripping electrode (3) without falling off or getting stuck.

6. The PCB-mounted T1+T2 lightning protection module according to claim 1, characterized in that: The housing (1) is provided with an alarm window (13), and the sliding block (5) has a striking feature. A user can see the sliding block (5) through the alarm window (13), thereby determining whether the trip pin (6) and the trip electrode (3) are tripped.

7. The PCB-mounted T1+T2 lightning protection module according to claim 1, characterized in that: It also includes a reinforcement block (22); the number of the reinforcement blocks (22) is two, the two reinforcement blocks (22) are installed on the sliding block (5) near the tripping electrode (3), and the two reinforcement blocks (22) provide lateral support for the spring A (11) and the spring B (12).

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