Onboard surge protector

Abstract

The utility model relates to the technical field of lightning protection devices, in particular to an onboard surge protector, which comprises a shell, an insertion core, a piezoresistor, a tripping electrode and an elastic tripping assembly, the outer side of the insertion core is sleeved with the shell. The insertion core is provided with a through hole. The piezoresistor is connected with one end of the insertion core, and a pin of the piezoresistor is provided with a wiring electrode a and a contact electrode; when the piezoresistor is installed, the contact electrode is located at the through hole. The tripping electrode connection insertion core is connected with the contact electrode through soldering tin. The elastic tripping assembly is slidably mounted at the other end of the insertion core, and the sliding end of the elastic tripping assembly is provided with a guide hole for the tripping electrode to penetrate through; when the onboard surge protector is in a working state, the elastic tripping assembly has elastic potential energy, and the sliding end of the elastic tripping assembly compresses the tripping electrode. The onboard surge protector provided by the utility model can meet the requirement that the onboard surge protector has a larger electrical safety distance under the condition that the onboard surge protector is small in size, so that the use reliability and the service life of the onboard surge protector are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a board-mounted surge protector. Background Art

[0002] Surge Protective Device (SPD) is an electronic device that provides safety protection for various electronic equipment, instruments and communication lines. It is mainly used to limit transient overvoltage and discharge surge current. Its function is to limit the instantaneous overvoltage that penetrates into the power line and signal transmission line to the voltage range that the equipment or system can withstand, or to discharge the strong lightning current into the ground to protect the protected equipment or system from damage caused by the impact.

[0003] With the integration and miniaturization of user systems, traditional SPDs can no longer meet the installation space requirements of user systems due to their large size. The on-board surge protector is small in size and can be placed directly on the PCB board, which is convenient for installation and can meet the integrated space usage requirements; however, as the use environment of the user system becomes increasingly complex, such as in high-voltage applications, or in conditions of high altitude, large temperature changes, and heavy environmental pollution, the internal electrical safety distance requirements for smaller on-board surge protectors are more stringent. If the electrical safety distance is insufficient, flashovers will occur between different live parts inside the surge protector, causing short circuits in the parts that should have been insulated. This will not only damage the surge protector itself, but may also affect the entire circuit system, causing equipment failure. Existing on-board surge protectors cannot meet the needs of use. Utility Model Content

[0004] The utility model aims to provide a board-mounted surge protector in view of the problems existing in the background technology.

[0005] The technical solution of the utility model: a board-mounted surge protector, comprising

[0006] shell;

[0007] The plug is connected to the shell, and a through hole is provided on the plug; the shell is sleeved on the outside of the plug;

[0008] A varistor, one end of which is connected to the plug core, a wiring electrode a is provided at one pin of the varistor; a contact electrode is provided at the other pin of the varistor; when the varistor is installed, the contact electrode is located at the through hole;

[0009] A tripping electrode is connected to the plug core, and one end of the tripping electrode is connected to the contact electrode by soldering;

[0010] An elastic release component is slidably mounted on the other end of the plug core, and the sliding end of the elastic release component has a guide hole for the release electrode to pass through; when the onboard surge protector is in working state, the elastic release component has elastic potential energy, and the sliding end of the elastic release component presses the release electrode.

[0011] Preferably, the elastic release assembly comprises a sliding member and an elastic member; wherein a sliding plate portion is provided on the insert;

[0012] The sliding part is provided with a groove on its end surface along its sliding direction, and a through groove for matching the sliding plate part is provided on the sliding part; the guide hole is arranged on the sliding part; when the sliding part and the insert are in the matched installation state, the groove and the end surface of the insert form a receiving space for placing the elastic part; the elastic part is a spring.

[0013] Preferably, a limiting portion is further provided on the insert core; the limiting portion and the sliding member are arranged side by side.

[0014] Preferably, it also includes a remote signal electrode a and a remote signal electrode b; a pressing part is provided on the sliding member;

[0015] The remote signaling electrode a and the remote signaling electrode b are both connected to the plug core, and the remote signaling electrode a and the remote signaling electrode b both have movable toughness sections; when the onboard surge protector is in a working state, the remote signaling electrode a and the remote signaling electrode b are pressed tightly between the pressing portion and the plug core.

[0016] Preferably, the housing is provided with an observation hole; the end surface of the sliding member away from the pressing portion is provided with a normal state indicating portion; the plug core is provided with a failure state indicating portion; the normal state indicating portion and the failure state indicating portion have different color indicating layers;

[0017] When the onboard surge protector is in working state, the normal state indicator is located at the observation hole;

[0018] When the onboard surge protector fails, the failure status indicator is located at the observation hole.

[0019] Preferably, the sliding member is concave-shaped.

[0020] Preferably, the projection shape of the slide plate is a U-shape; the limiting portion is located inside the U-shaped notch of the slide plate; and two through grooves are arranged side by side and matched with two parallel ends of the slide plate.

[0021] Preferably, the orthographic projection shape of the tripping electrode is L-shaped.

[0022] Preferably, the tripping electrode includes a wiring electrode b and a guide electrode for inserting into the guide hole;

[0023] The wiring electrode b is connected to the guide electrode.

[0024] Preferably, the housing and the insert are detachably connected.

[0025] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0026] The board-mounted surge protector provided by the utility model places the wiring electrode a and the wiring electrode b connected to the device to be protected on both sides of the plug core, thereby increasing the electrical safety distance between the wiring electrode a, the wiring electrode b and the remote signaling electrode, thereby ensuring the safety of its use; in addition, the elastic member, i.e., the spring, is completely covered by the provided sliding member, thereby preventing the spring from shortening the electrical safety distance between the tripping electrode and the remote signaling electrode as a metal medium, thereby solving the problem of insufficient internal electrical safety distance of the existing board-mounted surge protector due to its small size, thereby meeting the demand for the board-mounted surge protector to be used in more complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 Exploded diagram of

[0029] Figure 3 In normal state Figure 1 A three-dimensional image after removing the outer shell;

[0030] Figure 4 In the failed state Figure 1 A three-dimensional image after removing the outer shell;

[0031] Figure 5 for Figure 4 A stereogram from another perspective;

[0032] Figure 6 for Figure 4 Exploded diagram of

[0033] Figure 7 for Figure 6 A three-dimensional diagram of a medium varistor;

[0034] Figure 8 for Figure 6 A three-dimensional diagram of the middle insert;

[0035] Fig. 9 for Figure 6 Exploded view of the tripping electrode;

[0036] Fig.10 for Figure 6 A perspective view of the middle sliding member;

[0037] Figure numerals: 1. shell; 101. limit hole; 2. insert core; 21. slide plate; 22. limit part; 23. through hole; 201. limit block; 3. remote signal electrode a; 4. remote signal electrode b; 5. trip electrode; 51. wiring electrode b; 52. guide electrode; 6. varistor; 61. wiring electrode a; 62. contact electrode; 7. sliding part; 71. groove; 72. guide hole; 73. normal state indicator; 74. pressing part; 8. elastic part. DETAILED DESCRIPTION

[0038] Embodiment 1

[0039] The utility model provides a board-mounted surge protector, comprising a housing 1, a plug core 2, a varistor 6, a tripping electrode 5 and an elastic tripping assembly;

[0040] like Figure 1-2 As shown, the housing 1 is sleeved on the outer side of the ferrule 2 , and the housing 1 is connected to the ferrule 2 .

[0041] In an optional embodiment, the shell 1 is a hollow structure with an opening at one end, and the shell 1 and the core 2 are detachably connected; a plurality of limit holes 101 are provided on the side end face of the shell 1; a plurality of limit blocks 201 are provided on the core 2; the limit blocks 201 correspond one to one to the limit holes 101; when the shell 1 and the core 2 are in a mating installation state, the limit blocks 201 are located in the limit holes 101, and an end face of the limit block 201 away from the opening of the shell 1 is set as an inclined surface.

[0042] like Figure 2-8 As shown, the ferrule 2 is provided with a through hole 23;

[0043] The varistor 6 is connected to one end of the plug core 2, and a wiring electrode a61 is provided at one pin of the varistor 6; the wiring electrode a61 is integrated with one pin of the varistor 6; a contact electrode 62 is provided at the other pin of the varistor 6; when the varistor 6 is installed, the contact electrode 62 is located at the through hole 23;

[0044] In an optional embodiment, one end of the insert core 2 is provided with a receiving groove a for receiving the varistor 6; the varistor 6 is adhered to the receiving groove a by, but not limited to, glue;

[0045] The tripping electrode 5 is connected to the ferrule 2, and one end of the tripping electrode 5 is connected to the contact electrode 62 through soldering;

[0046] The elastic tripping component is slidably installed at the other end of the ferrule 2. The sliding end of the elastic tripping component has a guiding hole 72 for the tripping electrode 5 to penetrate through. When the on-board surge protector is in the working state, the elastic tripping component has elastic potential energy, and the sliding end of the elastic tripping component presses against the tripping electrode 5. When the on-board surge protector is in a gradually failing state, the solder joint of the tripping electrode 5 and the contact electrode 62 melts under the action of the temperature rise of the varistor 6, that is, the temperature at the soldering point rapidly rises to its melting point. The elastic tripping component slides on the ferrule 2 to separate the tripping electrode 5 from the contact electrode 62, and the on-board surge protector fails. To cut off the current and achieve the function of extinguishing the arc.

[0047] Embodiment 2

[0048] As Figure 1-10 shown, a kind of on-board surge protector proposed by the present utility model, compared with Embodiment 1, this embodiment also details the specific structure of the elastic tripping component; the elastic tripping component includes a sliding member 7 and an elastic member 8; wherein, the ferrule 2 is provided with a sliding plate portion 21 and a limiting portion 22; the limiting portion 22 and the sliding member 7 are arranged side by side to limit the sliding distance of the sliding member 7 when the on-board surge protector fails.

[0049] As Figure 8 and Fig.10 shown, the sliding member 7 is provided with a groove 71 on its end face along its sliding direction, and the sliding member 7 is provided with a through groove for cooperating with the sliding plate portion 21; the guiding hole 72 is arranged on the sliding member 7; when the sliding member 7 and the ferrule 2 are in a cooperative installation state, the groove 71 and the end face of the ferrule 2 enclose an accommodating space for placing the elastic member 8; wherein, the elastic member 8 is a spring, and the spring is covered inside the sliding member 7 to prevent the spring from shortening the electrical safety distance between the tripping electrode 5 and the telecommunication electrode a and the telecommunication electrode b as a metal medium, improving the safety of use.

[0050] In an optional embodiment, the sliding member 7 is U-shaped; the projection shape of the sliding plate portion 21 is U-shaped;

[0051] The limiting portion 22 is located inside the U-shaped groove opening of the sliding plate portion 21, that is, the limiting portion 22 is located between the two parallel ends of the sliding plate portion 21; when the on-board surge protector is in a failing state, the limiting portion 22 is located inside the U-shaped opening of the sliding member 7 and presses against the sliding member 7;

[0052] The through groove is provided with two in parallel for accommodating the two parallel ends of the sliding plate portion 21; there are two grooves 71 on the sliding member 7, and the two grooves 71 are located on both sides of the through groove between the two through grooves, and there is one guiding hole 72, and the guiding hole 72 is located between the two through grooves.

[0053] Embodiment 3

[0054] As Figure 1-6 and Fig.10As shown, the board-mounted surge protector proposed by the utility model, compared with the second embodiment, this embodiment further includes a remote signaling electrode a3 and a remote signaling electrode b4; a pressing portion 74 is provided on the sliding member 7;

[0055] The remote signaling electrode a3 and the remote signaling electrode b4 are both connected to the plug core 2; wherein, a receiving groove b is provided at the other end of the plug core 2; a through hole 23 connects the receiving groove a and the receiving groove b; the slide plate portion 21 and the limiting portion 22 are both located in the receiving groove b; the receiving groove b is provided with two groups of slots for the remote signaling electrode a3 and the remote signaling electrode b4 to be movably inserted at the lower end of the plug core 2; the remote signaling electrode a3 and the remote signaling electrode b4 both have a wiring section, a limiting section and a toughness section; the wiring section is used to connect to an external line, and the wiring section and the limiting section cooperate with the slot on the plug core 2 to make it stable; the toughness section is located in the receiving groove b and deflects under the action of an external force;

[0056] Both the remote signaling electrode a3 and the remote signaling electrode b4 have movable tough sections; when the onboard surge protector is in working state, the remote signaling electrode a3 and the remote signaling electrode b4 are pressed between the pressing portion 74 and the plug core 2, so that the tough sections of the remote signaling electrode a3 and the remote signaling electrode b4 are pressed, and then the remote signaling electrode a3 and the remote signaling electrode b4 are connected to the external alarm circuit. When the tough sections of the remote signaling electrode a3 and the remote signaling electrode b4 are pressed, the alarm circuit does not alarm. When the tough sections of the remote signaling electrode a3 and the remote signaling electrode b4 are separated, the alarm circuit is energized to run and alarm reminders are given.

[0057] Embodiment 4

[0058] like Figure 1 , Figure 4 and Fig.10 As shown, a board-mounted surge protector proposed by the utility model, compared with the second embodiment or the third embodiment, in this embodiment, an observation hole is provided on the housing 1; a normal state indicator 73 is provided on the end surface of the sliding member 7 away from the pressing portion 74; a failure state indicator 24 is provided on the ferrule 2; the normal state indicator 73 and the failure state indicator 24 have different color indicator layers; wherein the color indicator layer of the normal state indicator 73 is selected from but not limited to green; the color indicator layer of the failure state indicator 24 is selected from but not limited to red;

[0059] When the onboard surge protector is in working state, the normal state indicator 73 and the failure state indicator 24 are arranged side by side, and the normal state indicator 73 is located at the observation hole;

[0060] When the onboard surge protector is in a failed state, the normal state indicator 73 is pushed away from the observation hole by the elastic member 8, and the failed state indicator 24 is located at the observation hole;

[0061] A red failure status indicator 24 is observed at the observation hole, indicating that the onboard surge protector has failed, generating a local alarm to remind the staff that they need to replace the onboard surge protector after checking it; at the same time, when the tough sections of the remote signal electrode a3 and the remote signal electrode b4 are separated, the alarm circuit is energized to generate a remote alarm to issue an alarm reminder in the system to which it is connected so that the staff can know the failure information in time.

[0062] Embodiment 5

[0063] like Figure 1-6 and Figure 8-10 As shown, the board-mounted surge protector proposed by the utility model, compared with the first embodiment, the orthographic projection shape of the tripping electrode 5 in this embodiment is L-shaped. Specifically, the tripping electrode 5 includes a wiring electrode b51 and a guide electrode 52 for fitting and inserting into the guide hole 72;

[0064] The wiring electrode b51 is in sheet shape; the projection shape of the guide electrode 52 is L-shaped; the end face of the sheet-shaped wiring electrode b51 fits the small end face of the L-shaped guide electrode 52 and is detachably connected, so that the wiring electrode b51 is connected to the guide electrode 52; the guide electrode 52 cooperates with the guide hole 72.

[0065] In an optional embodiment, the wiring electrode b51 is located on one side of the core 2, and the wiring electrode a61 is located on the other side of the core 2. At the same time, a slot structure for accommodating the wiring electrode b51 and the wiring electrode a61 is opened on two end faces of the core 2 that are far away from each other, so that the opposite sides of the two electrodes can be installed and the electrical safety distance between the remote signaling electrode a and the remote signaling electrode b can be increased.

[0066] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A board-mounted surge protector, characterized in that: include Housing (1); The plug core (2) is connected to the housing (1), and a through hole (23) is provided on the plug core (2); the housing (1) is sleeved on the outer side of the plug core (2); A varistor (6) is connected to one end of the plug core (2); a wiring electrode a (61) is provided at one pin of the varistor (6); a contact electrode (62) is provided at the other pin of the varistor (6); when the varistor (6) is installed, the contact electrode (62) is located at the through hole (23); A release electrode (5) connected to the plug core (2), one end of the release electrode (5) being connected to the contact electrode (62) via solder; An elastic release assembly is slidably mounted on the other end of the plug core (2), and the sliding end of the elastic release assembly has a guide hole (72) for a release electrode (5) to pass through; when the onboard surge protector is in working state, the elastic release assembly has elastic potential energy, and the sliding end of the elastic release assembly presses the release electrode (5).

2. A board-mounted surge protector according to claim 1, characterized in that: The elastic release assembly comprises a sliding member (7) and an elastic member (8); wherein a sliding plate portion (21) is provided on the insert core (2); The sliding member (7) is provided with a groove (71) on its end surface along its sliding direction, and the sliding member (7) is provided with a through groove for matching with the sliding plate portion (21); the guide hole (72) is arranged on the sliding member (7); when the sliding member (7) and the insert core (2) are in a matched installation state, the groove (71) and the end surface of the insert core (2) form a receiving space for placing the elastic member (8).

3. A board-mounted surge protector according to claim 2, characterized in that: A limiting portion (22) is also provided on the insert core (2); the limiting portion (22) and the sliding member (7) are arranged side by side.

4. The onboard surge protector according to claim 2, characterized in that: It also includes a remote signaling electrode a (3) and a remote signaling electrode b (4); a pressing portion (74) is provided on the sliding member (7); The remote signaling electrode a (3) and the remote signaling electrode b (4) are both connected to the plug core (2), and both the remote signaling electrode a (3) and the remote signaling electrode b (4) have movable tough sections; when the onboard surge protector is in a working state, the remote signaling electrode a (3) and the remote signaling electrode b (4) are pressed tightly between the pressing portion (74) and the plug core (2).

5. A board-mounted surge protector according to claim 4, characterized in that: The housing (1) is provided with an observation hole; a normal state indicating portion (73) is provided on the end surface of the sliding member (7) away from the pressing portion (74); a failure state indicating portion (24) is provided on the plug core (2); the normal state indicating portion (73) and the failure state indicating portion (24) have different color indicating layers; When the onboard surge protector is in working state, the normal state indicator (73) is located at the observation hole; When the onboard surge protector is in a failure state, the failure state indicator (24) is located at the observation hole.

6. The onboard surge protector according to claim 3, characterized in that: The sliding member (7) is in a concave shape.

7. The onboard surge protector according to claim 6, characterized in that: The projection shape of the slide plate (21) is a U-shaped shape; the limiting portion (22) is located inside the U-shaped notch of the slide plate (21); and two through grooves are arranged side by side and matched with two parallel ends of the slide plate (21).

8. The onboard surge protector according to claim 1, characterized in that: The orthographic projection shape of the tripping electrode (5) is L-shaped.

9. The onboard surge protector according to claim 8, characterized in that: The tripping electrode (5) comprises a wiring electrode b (51) and a guide electrode (52) for being inserted into the guide hole (72); The wiring electrode b (51) is connected to the guide electrode (52).

10. The onboard surge protector according to claim 1, characterized in that: The housing (1) and the insert (2) are detachably connected.

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