阅读说明：本技术 具有防过载功能的智能插线板 (Intelligent patch board with overload prevention function ) 是由 沈一群 于 2020-08-01 设计创作，主要内容包括：本发明揭示一种具有防过载功能的智能插线板,包括排插本体和插头本体,排插本体通过电源线与插头本体电连接,插头本体包括后壳体和前盖板,后壳体的底部穿设有两个导电插片,导电插片与后壳体固定,电源线中的两根线芯分别与其中一个导电插片电连接；后壳体的内部设置有推杆,推杆的上端转动连接有滑环,滑环与后壳体滑动连接,两个导电插片之间的后壳体的底部设置有通孔,推杆的下端活动插入在通孔中；后壳体上设置有锁紧机构,后壳体的后侧内壁上固定有电磁铁,电磁铁与其中一根线芯串联连接,推杆与后壳体之间设置有驱动机构,后壳体上设置有复位机构；本发明在使用时,当插线板出现过载现象时,能够达到过载保护的目的。(The invention discloses an intelligent patch board with an overload prevention function, which comprises a patch board body and a plug body, wherein the patch board body is electrically connected with the plug body through a power line; a push rod is arranged in the rear shell, the upper end of the push rod is rotatably connected with a slip ring, the slip ring is connected with the rear shell in a sliding manner, a through hole is formed in the bottom of the rear shell between the two conductive insertion pieces, and the lower end of the push rod is movably inserted into the through hole; the rear shell is provided with a locking mechanism, the inner wall of the rear side of the rear shell is fixedly provided with an electromagnet, the electromagnet is connected with one wire core in series, a driving mechanism is arranged between the push rod and the rear shell, and the rear shell is provided with a resetting mechanism; when the overload protection device is used, the overload protection purpose can be achieved when the overload phenomenon occurs to the patch board.)

1. The utility model provides an intelligence wiring board with overload prevention function, includes extension socket body (1) and plug body (2), extension socket body (1) is connected with plug body (2) electricity through power cord (3), plug body (2) include back casing (21) and front shroud (22), opening part at back casing (21) front end is fixed to front shroud (22), two electrically conductive inserted sheets (23) are worn to be equipped with in the bottom of back casing (21), electrically conductive inserted sheet (23) are fixed with back casing (21), two sinle silks (31) in power cord (3) are connected with one of them electrically conductive inserted sheet (23) electricity respectively; the method is characterized in that: a push rod (4) is arranged inside the rear shell (21), the push rod (4) is used for abutting against a wall socket when the patch board is overloaded so that the conductive insertion pieces (23) on the plug body (2) are separated from the wall socket, the upper end of the push rod (4) is rotatably connected with a slip ring (5), the slip ring (5) is connected with the rear shell (21) in a sliding manner, a through hole (24) is formed in the bottom of the rear shell (21) between the two conductive insertion pieces (23), and the lower end of the push rod (4) is movably inserted into the through hole (24); be provided with on back casing (21) and shift up the locking mechanism who is used for locking push rod (4) after reseing in push rod (4), be fixed with on the rear side inner wall of back casing (21) and be used for driving locking mechanism so that locking mechanism unblock electro-magnet (6) of push rod (4), electro-magnet (6) and one of them sinle silk (31) series connection, be provided with between push rod (4) and back casing (21) and be used for driving actuating mechanism that push rod (4) moved down behind locking mechanism unblock push rod (4), be provided with on back casing (21) and be used for driving push rod (4) to shift up the canceling release mechanical system who resets.

2. The intelligent patch board with the overload prevention function according to claim 1, wherein a support seat (25) is integrally formed on the inner wall of the rear side of the rear housing (21), the sliding ring (5) is slidably connected to the support seat (25), the upper end of the push rod (4) extends into the support seat (25) and is slidably connected to the support seat (25), an arc-shaped groove (51) is formed in the sliding ring (5), the arc-shaped groove (51) is coaxially arranged with the sliding ring (5), the arc-shaped groove (51) is of a semi-annular structure, the arc-shaped groove (51) is located on the front side of the sliding ring (5), the vertical section of the arc-shaped groove (51) is of a T shape, a bolt (52) is movably inserted in the arc-shaped groove (51), the bolt (52) is movably inserted through the arc-shaped groove (51) and then is in threaded connection with the upper end of the push rod (4), and sliders (53) are integrally formed on the outer walls of the left side and the right side of the sliding ring (5, the sliding ring is characterized in that sliding grooves (251) extending along the vertical direction are formed in the left side wall and the right side wall of the supporting seat (25), sliding blocks (53) on each side of the sliding ring (5) are connected with the sliding grooves (251) on the corresponding sides in a sliding mode, and a first cross groove (41) used for being matched with the end portion of a cross screwdriver to enable the cross screwdriver to rotate the push rod (4) conveniently is formed in the lower end face of the push rod (4).

3. The intelligent patch board with the overload prevention function according to claim 2, wherein the driving mechanism comprises a first spring (7), a blind hole (42) with an open upper end is formed in the push rod (4), the first spring (7) is arranged in the blind hole (42), the upper end of the first spring (7) penetrates through the sliding ring (5) and abuts against the inner top of the supporting seat (25), and the lower end of the first spring (7) abuts against the inner bottom of the blind hole (42).

4. The intelligent patch board with the overload prevention function according to claim 3, wherein the inner diameter of the slip ring (5) is gradually reduced from top to bottom to form a horn-shaped structure, and the diameter of the blind hole (42) is the same as the minimum inner diameter at the lower end of the slip ring (5).

5. The intelligent patch board with an overload prevention function according to claim 1, the locking mechanism comprises a sliding plate (81), a clamping tooth block (811) is integrally formed on the inner end surface of the sliding plate (81), a first annular tooth groove (43) which is matched and clamped with the tooth clamping block (811) after the push rod (4) moves upwards and resets is arranged on the outer wall of the push rod (4), a second annular tooth groove (44) for clamping the tooth clamping block (811) after the push rod (4) moves down to the right position is arranged on the outer wall of the push rod (4), a tooth groove part (45) which is used for being matched and clamped with the clamping tooth block (811) is arranged on the right side wall of the push rod (4) between the second annular tooth groove (44) and the first annular tooth groove (43), the upper end of the tooth groove part (45) extends to the position of the second annular tooth groove (44), the lower end of the tooth groove part (45) extends to a first annular tooth groove (43); the outer wall at both ends of slide (81) is gone up the homogeneous body and is formed with outside extension's slide bar (812), and the outer tip of every slide bar (812) all moves about and runs through and stretch out outside corresponding supporting shoe (26) behind one of them supporting shoe (26) that lie in on rear shell (21) rear side inner wall, and every slide bar (812) all cooperates the joint after stretching out supporting shoe (26) and has had jump ring (82), slide bar (812) outside between slide (81) and every supporting shoe (26) all overlaps and is equipped with second spring (83) that are used for promoting slide (81), the middle part of the outer terminal surface of slide (81) is fixed with iron sheet (84) that are used for with electro-magnet (6) magnetic attraction when electro-magnet (6) circular telegram.

6. The intelligent patch board with the overload prevention function according to claim 1, wherein the reset mechanism comprises a gear (9) rotatably connected to the inner wall of the rear side of the rear shell (21), an annular rack portion (46) meshed with the gear (9) is arranged on the outer wall of the push rod (4), the annular rack portion (46) extends along the length direction of the push rod (4), a pin shaft (27) is integrally formed on the inner wall of the rear side of the rear shell (21), the gear (9) is sleeved outside the pin shaft (27) and is rotatably connected with the pin shaft (27), a boss (91) coaxially arranged with the gear (9) is integrally formed on the front end face of the gear (9), the boss (91) is movably arranged in the front cover plate (22), and a second cross-shaped groove (92) used for being matched with the end portion of a cross screwdriver to facilitate the rotation of the cross-shaped screwdriver and the gear (9) is arranged on the front end face of the boss (91).

7. The intelligent patch board with the overload prevention function according to claim 1, wherein each wire core (31) is fixed on the inner wall of the rear side of the rear housing (21) by a plurality of wire pressing buttons (32).

Technical Field

The invention relates to the technical field of electrical devices, in particular to an intelligent patch board with an overload prevention function.

Background

The wiring board is an electrical device which is commonly used in life and used for prolonging a socket or expanding a socket, when the existing wiring board is connected with too many electrical appliances or high-power electrical appliances in the using process, the phenomenon of overload easily occurs, and after the wiring board is overloaded, the phenomenon of burning easily occurs, so that great potential safety hazards exist.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the intelligent patch board with the overload prevention function, when the patch board is used, when the overload phenomenon occurs on the patch board, the plug body in the patch board can automatically separate from a wall socket, namely, the power supply can be automatically cut off, so that the purpose of overload protection can be achieved, the phenomenon of fire burning of the patch board can be avoided, and the potential safety hazard is eliminated.

The intelligent patch board with the overload prevention function comprises a patch board body and a plug body, wherein the patch board body is electrically connected with the plug body through a power line, the plug body comprises a rear shell and a front cover plate, the front cover plate is fixed at an opening at the front end of the rear shell, two conductive insertion pieces penetrate through the bottom of the rear shell, the conductive insertion pieces are fixed with the rear shell, and two wire cores in the power line are respectively and electrically connected with one conductive insertion piece; a push rod is arranged in the rear shell and is used for abutting against the wall socket when the patch board is overloaded so as to enable the conductive insertion pieces on the plug body to be separated from the wall socket, the upper end of the push rod is rotatably connected with a sliding ring, the sliding ring is connected with the rear shell in a sliding manner, a through hole is formed in the bottom of the rear shell between the two conductive insertion pieces, and the lower end of the push rod is movably inserted into the through hole; the rear shell is provided with a locking mechanism used for locking the push rod after the push rod moves upwards and resets, an electromagnet used for driving the locking mechanism to unlock the push rod by the locking mechanism is fixed on the inner wall of the rear side of the rear shell, the electromagnet is connected with one wire core in series, a driving mechanism used for driving the push rod to move downwards after the push rod is unlocked by the locking mechanism is arranged between the push rod and the rear shell, and the rear shell is provided with a resetting mechanism used for driving the push rod to move upwards and reset.

The invention discloses an intelligent patch board with an overload prevention function, wherein a supporting seat is integrally formed on the inner wall of the rear side of a rear shell, a sliding ring is connected onto the supporting seat in a sliding manner, the upper end of a push rod extends into the supporting seat and is connected with the supporting seat in a sliding manner, an arc-shaped groove is formed in the sliding ring and is coaxially arranged with the sliding ring, the arc-shaped groove is of a semi-annular structure and is positioned on the front side of the sliding ring, the vertical section of the arc-shaped groove is in a T shape, a bolt is movably penetrated in the arc-shaped groove, the bolt movably penetrates through the arc-shaped groove and is in threaded connection with the upper end of the push rod, sliding blocks are uniformly formed on the outer walls of the left side and the right side of the sliding ring in a integrated manner, sliding grooves extending along the vertical direction are formed in the two side walls of the left side and the right side of the supporting seat, the sliding blocks on each side; by adopting the structure, the slip ring can be reliably and vertically connected on the supporting seat in a sliding manner, and the circumferential limit of the slip ring can be realized by matching the sliding block and the sliding groove; in addition, because the bolt sets up in the arc wall, and the bolt is again with push rod threaded connection, so, when the head that adopts the cross screwdriver and first cross recess cooperation and rotate the push rod, the push rod can rotate for the sliding ring, and the angle that the push rod can rotate for the sliding ring is 180 degrees.

The invention discloses an intelligent patch board with an overload prevention function, wherein a driving mechanism comprises a first spring, a blind hole with an opening at the upper end is formed in a push rod, the first spring is arranged in the blind hole, the upper end of the first spring is abutted against the inner top of a supporting seat after penetrating through a slip ring, and the lower end of the first spring is abutted against the inner bottom of the blind hole; after adopting this kind of actuating mechanism, after locking mechanism unblock push rod, the push rod can move down under the effect of first spring, at the in-process that the push rod moved down, the lower extreme of push rod can push away the wall socket, push rod can exert thrust to the wall socket promptly, and the reaction force that the wall socket applyed to the plug body can push away the plug body, so, can make the electrically conductive inserted sheet in the plug body break away from the wall socket, plug body can automatic disconnection power to can reach overload protection's purpose.

The intelligent patch board with the overload prevention function, disclosed by the invention, is characterized in that the inner diameter of the slip ring is gradually reduced from top to bottom to form a horn-shaped structure, and the aperture of the blind hole is the same as the minimum inner diameter at the lower end of the slip ring; after adopting this kind of structure, when the push rod shifts up to reset, first spring can lead with the inner wall cooperation of sliding ring to make things convenient for the spring to retract in the blind hole through the direction of sliding ring inner wall.

The invention discloses an intelligent wiring board with an overload prevention function, wherein a locking mechanism comprises a sliding plate, a clamping tooth block is integrally formed on the inner end surface of the sliding plate, a first annular tooth groove which is used for being matched and clamped with the clamping tooth block after a push rod moves upwards and resets is arranged on the outer wall of a push rod, a second annular tooth groove which is used for clamping the clamping tooth block after the push rod moves downwards to the proper position is arranged on the outer wall of the push rod, a tooth groove part which is used for being matched and clamped with the clamping tooth block is arranged on the right side wall of the push rod between the second annular tooth groove and the first annular tooth groove, the upper end of the tooth groove part extends to the second annular tooth groove, and the lower end of the tooth groove; the outer walls of the two ends of the sliding plate are integrally provided with outwards extending sliding rods, the outer end part of each sliding rod movably penetrates through one supporting block on the inner wall of the rear side of the rear shell and then extends out of the corresponding supporting block, each sliding rod extends out of the supporting block and is clamped with a snap spring in a matched manner, a second spring for pushing the sliding plate is sleeved outside each sliding rod between the sliding plate and each supporting block, and the middle part of the outer end face of the sliding plate is fixedly provided with an iron sheet which is used for being magnetically attracted with the electromagnet when the electromagnet is electrified; after the locking mechanism is adopted, when the wiring board is overloaded, the current in the electromagnet is increased, at the moment, the attraction force of the electromagnet can be increased, so that the electromagnet can magnetically attract the iron sheet and drive the sliding plate to move outwards, the sliding plate can drive the latch block to move outwards after moving outwards, the latch block can be separated from the first annular tooth groove after moving outwards, at the moment, the driving mechanism can drive the push rod to move downwards, in the process that the push rod moves downwards, the lower end of the push rod can push the wall socket, namely, the push rod can apply thrust to the wall socket, and the counterforce applied to the plug body by the wall socket can push the plug body, so that the conductive insert in the plug body can be separated from the wall socket, the plug body can automatically disconnect a power supply, and the overload protection purpose can be achieved; in addition, when the push rod moves downwards to the right position, the clamping tooth block can be clamped into the second annular tooth groove under the action of the second spring; in addition, in the state that the latch block is matched and clamped with the second annular tooth groove, when the head of the cross screwdriver is matched with the first cross groove and the push rod is rotated clockwise, the push rod can rotate relative to the sliding ring, the rotating angle of the push rod relative to the sliding ring is 180 degrees, in addition, the latch block can slide along the second annular tooth groove, after the push rod rotates clockwise 180 degrees, the tooth groove part on the push rod can face one side of the latch block, in the state, when the reset mechanism drives the push rod to move upwards, the latch block can be clamped with the latch grooves in the tooth groove part one by one from top to bottom (the tooth groove part is arranged in a way that the latch block can lock the push rod in the process that the reset mechanism drives the push rod to move upwards and reset, in this way, the phenomenon that the push rod moves downwards freely can be avoided), and after the push rod completely moves upwards and resets, the latch block can be clamped, then, the head of the cross screwdriver is matched with the first cross groove, and the push rod is rotated anticlockwise, so that the tooth groove part on the push rod can be rotated to the side far away from the clamping tooth block, and at the moment, the push rod is completely reset (in the process of rotating the push rod, the tooth head on the gear in the reset mechanism can slide along the annular tooth rack part).

The invention discloses an intelligent patch board with an overload prevention function, wherein a reset mechanism comprises a gear which is rotatably connected on the inner wall of the rear side of a rear shell, an annular rack part which is used for being meshed with the gear is arranged on the outer wall of a push rod, the annular rack part extends along the length direction of the push rod, a pin shaft is integrally formed on the inner wall of the rear side of the rear shell, the gear is sleeved outside the pin shaft and is rotatably connected with the pin shaft, a boss which is coaxially arranged with the gear is integrally formed on the front end surface of the gear, the boss is movably arranged in a front cover plate in a penetrating mode, and a second cross-shaped groove which is used for being matched with the end part of a cross screwdriver to facilitate the rotation of the boss; after the reset mechanism is adopted, when the cross screwdriver is matched with the second cross groove and the gear is rotated clockwise, the gear is meshed with the rack part on the push rod under the action of the gear, so that the push rod can be driven to move upwards for resetting, and compared with a mode of pushing the push rod to move upwards by hands, the aim of saving labor can be fulfilled.

According to the intelligent patch board with the overload prevention function, each wire core is fixed on the inner wall of the rear side of the rear shell through the plurality of wire pressing buckles; by adopting the structure, each wire core can be reliably fixed.

When the plug is used, when the patch board is overloaded, the plug body in the patch board can be automatically separated from the wall socket, namely, the power supply can be automatically cut off, so that the purpose of overload protection can be achieved, the phenomenon of burning of the patch board can be avoided, and potential safety hazards are eliminated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic structural view of the plug body electrically connected to a power cord;

FIG. 3 is a schematic view of the plug body with the front cover removed and with the push rod moved upward to reset;

FIG. 4 is a schematic, partly in section, view of the plug body with the front cover removed and the push rod moved downwardly into position;

FIG. 5 is a schematic structural view of the push rod of FIG. 4 after rotating clockwise 180 degrees;

FIG. 6 is a schematic partial cross-sectional view of the plug body with the front cover removed and after the reset mechanism has driven the push rod to move upward for reset;

FIG. 7 is a schematic view of the structure of FIG. 6 with the gear removed

FIG. 8 is a perspective view of the slip ring;

FIG. 9 is a perspective view of the slip ring;

FIG. 10 is an enlarged view of the structure at A in FIG. 3;

FIG. 11 is an enlarged view of the structure at B in FIG. 3;

fig. 12 is an enlarged schematic view of the structure at C in fig. 3.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The intelligent patch board with the overload prevention function comprises a patch board body 1 and a plug body 2, wherein the patch board body 1 is electrically connected with the plug body 2 through a power line 3, the plug body 2 comprises a rear shell 21 and a front cover plate 22, the front cover plate 22 is fixed at an opening at the front end of the rear shell 21, two conductive insertion pieces 23 penetrate through the bottom of the rear shell 21, the conductive insertion pieces 23 are fixed with the rear shell 21, and two wire cores 31 in the power line 3 are respectively and electrically connected with one conductive insertion piece 23; a push rod 4 is arranged in the rear shell 21, the push rod 4 is used for abutting against a wall socket when the patch board is overloaded so as to enable the conductive insertion pieces 23 on the plug body 2 to be separated from the wall socket, the upper end of the push rod 4 is rotatably connected with a slip ring 5, the slip ring 5 is in sliding connection with the rear shell 21, a through hole 24 is formed in the bottom of the rear shell 21 between the two conductive insertion pieces 23, and the lower end of the push rod 4 is movably inserted into the through hole 24; the rear shell 21 is provided with a locking mechanism which is used for locking the push rod 4 after the push rod 4 moves upwards and resets, the inner wall of the rear side of the rear shell 21 is fixed with an electromagnet 6 which is used for driving the locking mechanism to unlock the push rod 4 so that the locking mechanism unlocks the push rod 4, the electromagnet 6 is connected with one wire core 31 in series, a driving mechanism which is used for driving the push rod 4 to move downwards after the push rod 4 is unlocked by the locking mechanism is arranged between the push rod 4 and the rear shell 21, and the rear shell 21 is provided with a resetting mechanism which is used for driving the push rod 4 to.

A supporting seat 25 is integrally formed on the inner wall of the rear side of the rear shell 21, a sliding ring 5 is slidably connected to the supporting seat 25, the upper end of a push rod 4 extends into the supporting seat 25 and is slidably connected with the supporting seat 25, an arc-shaped groove 51 is formed in the sliding ring 5, the arc-shaped groove 51 and the sliding ring 5 are coaxially arranged, the arc-shaped groove 51 is of a semi-annular structure, the arc-shaped groove 51 is located on the front side of the sliding ring 5, the vertical section of the arc-shaped groove 51 is in a T shape, a bolt 52 is movably penetrated in the arc-shaped groove 51, the bolt 52 movably penetrates through the arc-shaped groove 51 and is in threaded connection with the upper end of the push rod 4, sliders 53 are integrally formed on the outer walls of the left side and the right side of the sliding ring 5, sliding grooves 251 extending along the vertical direction are formed on the two side walls of the left side and the right side of the supporting seat 25, the sliders 53 on each side of the sliding ring 5 are slidably; by adopting the structure, the slip ring can be reliably and vertically connected on the supporting seat in a sliding manner, and the circumferential limit of the slip ring can be realized by matching the sliding block and the sliding groove; in addition, because the bolt sets up in the arc wall, and the bolt is again with push rod threaded connection, so, when the head that adopts the cross screwdriver and first cross recess cooperation and rotate the push rod, the push rod can rotate for the sliding ring, and the angle that the push rod can rotate for the sliding ring is 180 degrees.

The driving mechanism comprises a first spring 7, a blind hole 42 with an opening at the upper end is formed in the push rod 4, the first spring 7 is arranged in the blind hole 42, the upper end of the first spring 7 is abutted against the inner top of the supporting seat 25 after penetrating through the sliding ring 5, and the lower end of the first spring 7 is abutted against the inner bottom of the blind hole 42; after adopting this kind of actuating mechanism, after locking mechanism unblock push rod, the push rod can move down under the effect of first spring, at the in-process that the push rod moved down, the lower extreme of push rod can push away the wall socket, push rod can exert thrust to the wall socket promptly, and the reaction force that the wall socket applyed to the plug body can push away the plug body, so, can make the electrically conductive inserted sheet in the plug body break away from the wall socket, plug body can automatic disconnection power to can reach overload protection's purpose.

The inner diameter of the slip ring 5 is gradually reduced from top to bottom to form a horn-shaped structure, and the aperture of the blind hole 42 is the same as the minimum inner diameter at the lower end of the slip ring 5; after adopting this kind of structure, when the push rod shifts up to reset, first spring can lead with the inner wall cooperation of sliding ring to make things convenient for the spring to retract in the blind hole through the direction of sliding ring inner wall.

The locking mechanism comprises a sliding plate 81, a clamping tooth block 811 is integrally formed on the inner end face of the sliding plate 81, a first annular tooth groove 43 which is used for being matched and clamped with the clamping tooth block 811 after the push rod 4 moves upwards and resets is arranged on the outer wall of the push rod 4, a second annular tooth groove 44 which is used for being clamped by the clamping tooth block 811 after the push rod 4 moves downwards and resets is arranged on the outer wall of the push rod 4, a tooth groove part 45 which is used for being matched and clamped with the clamping tooth block 811 is arranged on the right side wall of the push rod 4 between the second annular tooth groove 44 and the first annular tooth groove 43, the upper end of the tooth groove part 45 extends to the second annular tooth groove 44, and the lower end of the tooth groove part 45 extends to; sliding rods 812 extending outwards are integrally formed on the outer walls of the two ends of the sliding plate 81, the outer end of each sliding rod 812 movably penetrates through one of the supporting blocks 26 on the inner wall of the rear side of the rear shell 21 and then extends out of the corresponding supporting block 26, each sliding rod 812 extends out of the supporting block 26 and then is in matched clamping connection with a snap spring 82, a second spring 83 for pushing the sliding plate 81 is sleeved outside each sliding rod 812 between the sliding plate 81 and each supporting block 26, and an iron sheet 84 for magnetically attracting the electromagnet 6 when the electromagnet 6 is electrified is fixed in the middle of the outer end face of the sliding plate 81; after the locking mechanism is adopted, when the wiring board is overloaded, the current in the electromagnet is increased, at the moment, the attraction force of the electromagnet can be increased, so that the electromagnet can magnetically attract the iron sheet and drive the sliding plate to move outwards, the sliding plate can drive the latch block to move outwards after moving outwards, the latch block can be separated from the first annular tooth groove after moving outwards, at the moment, the driving mechanism can drive the push rod to move downwards, in the process that the push rod moves downwards, the lower end of the push rod can push the wall socket, namely, the push rod can apply thrust to the wall socket, and the counterforce applied to the plug body by the wall socket can push the plug body, so that the conductive insert in the plug body can be separated from the wall socket, the plug body can automatically disconnect a power supply, and the overload protection purpose can be achieved; in addition, when the push rod moves downwards to the right position, the clamping tooth block can be clamped into the second annular tooth groove under the action of the second spring; in addition, in the state that the latch block is matched and clamped with the second annular tooth groove, when the head of the cross screwdriver is matched with the first cross groove and the push rod is rotated clockwise, the push rod can rotate relative to the sliding ring, the rotating angle of the push rod relative to the sliding ring is 180 degrees, in addition, the latch block can slide along the second annular tooth groove, after the push rod rotates clockwise 180 degrees, the tooth groove part on the push rod can face one side of the latch block, in the state, when the reset mechanism drives the push rod to move upwards, the latch block can be clamped with the latch grooves in the tooth groove part one by one from top to bottom (the tooth groove part is arranged in a way that the latch block can lock the push rod in the process that the reset mechanism drives the push rod to move upwards and reset, in this way, the phenomenon that the push rod moves downwards freely can be avoided), and after the push rod completely moves upwards and resets, the latch block can be clamped, then, the head of the cross screwdriver is matched with the first cross groove, and the push rod is rotated anticlockwise, so that the tooth groove part on the push rod can be rotated to the side far away from the clamping tooth block, and at the moment, the push rod is completely reset (in the process of rotating the push rod, the tooth head on the gear in the reset mechanism can slide along the annular tooth rack part).

The reset mechanism comprises a gear 9 which is rotationally connected to the inner wall of the rear side of the rear shell 21, an annular rack part 46 which is meshed with the gear 9 is arranged on the outer wall of the push rod 4, the annular rack part 46 extends along the length direction of the push rod 4 in a square mode, a pin shaft 27 is integrally formed on the inner wall of the rear side of the rear shell 21, the gear 9 is sleeved outside the pin shaft 27 and is rotationally connected with the pin shaft 27, a boss 91 which is coaxial with the gear 9 is integrally formed on the front end face of the gear 9, the boss 91 is movably arranged in the front cover plate 22 in a penetrating mode, and a second cross-shaped groove 92 which is used for being matched with the end portion of a cross screwdriver to facilitate the rotation of the boss 91 and the gear; after the reset mechanism is adopted, when the cross screwdriver is matched with the second cross groove and the gear is rotated clockwise, the gear is meshed with the rack part on the push rod under the action of the gear, so that the push rod can be driven to move upwards for resetting, and compared with a mode of pushing the push rod to move upwards by hands, the aim of saving labor can be fulfilled.

Each wire core 31 is fixed on the inner wall of the rear side of the rear shell 21 through a plurality of wire pressing buckles 32; by adopting the structure, each wire core can be reliably fixed.

When the power socket is used, the plug body is matched and plugged with the wall socket, the plug of the electrical appliance is matched and plugged with the extension socket body, and at the moment, the power supply of the electrical appliance can be realized by the patch board; when excessive electric appliances are inserted into the extension socket body or high-power electric appliances are inserted into the extension socket body, so that the plug board is overloaded, the current in the power line and the wire core is increased, namely the current in the electromagnet is increased, so that the attraction of the electromagnet is improved, namely the electromagnet can magnetically attract the iron sheet on the sliding plate, after the electromagnet magnetically attracts the iron sheet, the sliding plate can overcome the elastic force of the second spring and move outwards, at the moment, the latch block can be separated from the first annular tooth groove under the action of the sliding plate, so that the push rod can be unlocked, after the push rod is unlocked, the push rod can move downwards under the action of the first spring (the gear can be driven to rotate anticlockwise when the push rod moves downwards), after the push rod moves downwards, the push rod can abut against the wall socket and push the wall socket, after the wall socket is pushed, the reaction force applied to the push rod by the wall socket can enable the electric conduction in the plug body to be, therefore, the purpose that the patch board is separated from the wall socket can be achieved, the power supply can be cut off, and the function of overload protection is achieved. When the patch board needs to be recovered after overload, namely when a push rod in the plug body needs to be reset, firstly, the head of the cross screwdriver is matched with the first cross groove and the push rod is rotated clockwise (when the push rod is rotated clockwise, the push rod can rotate relative to the slip ring, the rotating angle of the push rod relative to the slip ring is 180 degrees, at the moment, the latch block can slide along the second annular tooth groove), and after the push rod rotates clockwise for 180 degrees, the tooth groove part on the push rod can face one side of the latch block; then, a cross screwdriver is matched with the second cross-shaped groove and rotates the gear clockwise, the push rod can be driven to move upwards under the action of the gear and due to the fact that the gear is meshed with the rack portion on the push rod, the latch block can be clamped with the latch grooves in the tooth groove portion one by one from top to bottom in the upward moving process of the push rod (the function of the tooth groove portion is that the push rod can be locked in the upward moving and resetting process of the push rod driven by the resetting mechanism, in this way, the phenomenon that the push rod moves downwards freely can be avoided), and after the push rod completely moves upwards and resets, the latch block can be clamped into the first annular tooth groove; finally, the head of the cross screwdriver is matched with the first cross groove, and the push rod is rotated anticlockwise, so that the tooth groove portion on the push rod can be rotated to the side far away from the clamping tooth block, and at the moment, the push rod is completely reset (in the rotating process of the push rod, the tooth head on the gear in the reset mechanism can slide along the annular tooth rack portion).

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.