CN110707464B

CN110707464B - Three insert and two insert socket door protector that do not expose hole of combination jack

Info

Publication number: CN110707464B
Application number: CN201910934001.6A
Authority: CN
Inventors: 郭锐
Original assignee: Shanxi Weilong Technology Co ltd
Current assignee: Shanxi Weilong Technology Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-02-26
Anticipated expiration: 2039-09-29
Also published as: CN110707464A

Abstract

The invention provides a three-plug and two-plug combined jack hole-exposing-free socket protective door device, which belongs to the technical field of socket protective doors and comprises a socket cover, a protective door mounting box and a two-core single-pressure-proof structure; the socket cover is arranged on the top surface of the protective door mounting box, and two core upper jacks are arranged on the socket cover; the protective door mounting box is provided with two core lower jacks corresponding to the two core upper jacks; the two-core anti-single-pressure structure is a balanced anti-single-pressure structure or a linkage anti-single-pressure structure. The device has two functions of sealing the jack and preventing single pressing.

Description

Three insert and two insert socket door protector that do not expose hole of combination jack

Technical Field

The invention belongs to the technical field of socket protective doors, and particularly discloses a three-plug and two-plug combined jack hole-exposing-free socket protective door device.

Background

The socket without holes is a socket which is provided with a protective door aiming at completely closing the protective door on the jacks, so that the protective door can be used as a jack cover on the socket holes under the condition that the jacks of the protective socket are not electric-leakage, the jacks are not exposed, the jacks are in a state without the jacks, and the protective door closes the jacks under the non-use state.

Disclosure of Invention

The invention aims to provide a socket protective door device with three-plug and two-plug combined jacks and without hole exposure, which has two functions of closing the jacks and preventing single pressing.

In order to achieve the purpose, the invention provides a three-plug and two-plug combined jack hole-exposing-free socket protective door device, which comprises a socket cover, a protective door mounting box and a two-core single-pressure-proof structure; the socket cover is arranged on the top surface of the protective door mounting box, and two core upper jacks are arranged on the socket cover; the protective door mounting box is provided with two core lower jacks corresponding to the two core upper jacks; the two-core single-pressure preventing structure is a balanced single-pressure preventing structure or a linkage single-pressure preventing structure;

the balanced type single-pressure preventing structure comprises an integral two-core protective door and a single-pressure preventing support rod arranged on a protective door mounting box; the single-pressing prevention support rod is positioned on the perpendicular bisector of the two-core lower jack, and the top surface of the single-pressing prevention support rod is arc-shaped; the integral two-core protective door is provided with two-core protective blocks for sealing the jacks on the two cores, two-core avoiding grooves and two-core door shafts which are respectively positioned on two sides of the two-core protective blocks; the two-core avoiding groove is positioned between the two-core protecting blocks; the two core door shafts are rotatably arranged in a space enclosed by the socket cover and the protective door mounting box, arc-shaped grooves for accommodating the single-pressure-preventing supporting rods are arranged on the two core door shafts, and the central lines of the arc-shaped grooves and the central lines of the two core avoiding grooves are both positioned on a central vertical line of a connecting line of the jacks on the two cores;

the linkage type anti-single-pressure structure comprises a split type two-core protective door, a linkage rod and a door shaft frame; two core protection blocks and two core door shafts are arranged on the two split type two core protection doors; the two-core door shaft is rotatably arranged in the door shaft frame and is provided with a poking plate for applying force to the linkage rod to move the linkage rod; the two linkage rods are stacked and provided with supporting blocks for supporting the opposite split type protection doors; the integral two-core protective door or the split two-core protective door resets through the elastic resetting structure after the two-core plug is pulled out.

The first balanced type single-pressure preventing structure comprises first limiting grooves arranged on two sides of a single-pressure preventing supporting rod and a trapezoidal sliding block arranged in the first limiting grooves in a sliding mode; the elastic reset structure comprises a V-shaped elastic plate and a two-core reset spring; a first side plate of the V-shaped elastic plate is inserted into the inclined plane of the trapezoidal sliding block, and a second side plate is propped against the lower side surface of the two-core protective door; the first end of the two-core reset spring is connected with the back surface of the trapezoidal sliding block opposite to the inclined surface, and the second end of the two-core reset spring is connected with the inner wall of the protective door mounting box; a second limiting groove corresponding to the first limiting groove is formed in the inner wall of the socket cover; the top surface of the trapezoidal sliding block is abutted against the second limiting groove; the two trapezoidal sliding blocks are connected through a connecting rod; two ends of the connecting rod penetrate through the trapezoidal sliding block and are inserted into the lateral limiting groove on the inner wall of the socket cover.

The second balanced type single-pressure preventing structure comprises first limiting grooves arranged on two sides of the single-pressure preventing supporting rod; the elastic reset structure comprises a two-core reset spring; a two-core reset spring mounting plate is arranged on a two-core door shaft of the integral two-core protective door; spring mounting columns are arranged on the two-core reset spring mounting plate and the inner wall of the first limiting groove; two ends of the two core reset springs are respectively sleeved outside the spring mounting columns.

In the first linkage type anti-single-pressure structure, the door shaft frames are arranged at two sides of the jacks on the two cores; the linkage type single-pressure preventing structure also comprises an arc-shaped sliding rail arranged in the protective door mounting box; the linkage rods comprise a first linkage rod and a second linkage rod, and sliding rail grooves matched with the arc-shaped sliding rails are formed in the first linkage rod and the second linkage rod; the first linkage rod is of an L-shaped structure, a supporting block is arranged at the end part of the vertical rod, an occlusion groove is arranged at the lower side of the vertical rod, and a stress inclined plane which is contacted with the poking plate is arranged at the end part of the transverse rod; the second linkage rod comprises two sections of transverse rods and a vertical rod connected with the two sections of transverse rods, a supporting block is arranged at the end part of one section of transverse rod, a stress inclined plane in contact with the poking plate is arranged at the end part of the other section of transverse rod, and the meshing groove of the first linkage rod is lapped on the vertical rod of the second linkage rod; the elastic reset structure comprises a two-core reset spring, and two ends of the two-core reset spring are respectively connected with the linkage rod and the inner wall of the protective door mounting box.

In the second linkage type single-pressure prevention structure, the door shaft frame is arranged on the outer side of the jacks on the two cores; the linkage rod comprises a third linkage rod and a fourth linkage rod; the third linkage rod comprises two longitudinal rods and a transverse rod for connecting the two longitudinal rods, one longitudinal rod is clamped between the door shaft frames and positioned outside the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other longitudinal rod is provided with a supporting block and an upper clamping groove; the fourth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block and a lower clamping groove; the transverse rod of the third linkage rod is clamped in the lower clamping groove, and the transverse rod of the fourth linkage rod is clamped in the upper clamping groove; the elastic reset structure comprises two-core reset springs, and two ends of each two-core reset spring are respectively connected with the longitudinal rods, provided with the supporting blocks, of the third linkage rod and the fourth linkage rod.

In the third linkage type anti-single-pressure structure, a door shaft frame is arranged at the outer side of the two-core lower jack; the linkage rods comprise fifth linkage rods and sixth linkage rods; the fifth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block; the sixth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and is positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block and a lower convex block; the transverse rod of the sixth linkage rod is stacked on the transverse rod of the fifth linkage rod and clamped in the limiting column in the protective door mounting box, and the lower convex block of the sixth linkage rod is clamped outside the transverse rod of the fifth linkage rod; the elastic reset structure comprises a two-core reset spring, the first end of the two-core reset spring is connected with the longitudinal rod of which the fifth linkage rod or the sixth linkage rod is provided with a stress inclined plane, and the second end of the two-core reset spring is connected with the inner wall of the protective door mounting box.

The socket protective door device also comprises a grounding protective door, a three-core protective door and a T-shaped single-prevention pressing block; the socket cover is arranged on the top surface of the protective door mounting box, and the socket cover is provided with a grounding upper jack and a three-core upper jack; a grounding lower jack and a three-core lower jack which respectively correspond to the grounding upper jack and the three-core upper jack are arranged on the protective door mounting box, grounding protective door mounting plates are arranged on two sides of the grounding lower jack, and three-core protective door mounting plates are arranged on two sides or the outer sides of the three-core lower jack; the grounding protection door is provided with a grounding door shaft and a grounding protection block for sealing the grounding upper jack; the grounding door shaft is rotatably arranged on the grounding protection door mounting plate and is sleeved with a grounding return spring; the three-core protective door is provided with a three-core door shaft and a three-core protective block for sealing the jacks on the three-core door; the three-core door shaft is rotatably arranged on the three-core protective door mounting plate and sleeved with a three-core return spring; the T-shaped single-pressing-prevention block is arranged in the protective door mounting box in a sliding mode and comprises a vertical plate and a transverse plate; the vertical plate faces the grounding lower jack and can be pushed by the rotated grounding protection door; the transverse plate is used for supporting under the three-core protective door, and a single-pressing-block-prevention reset spring is arranged between the transverse plate and the inner wall of the protective door mounting box.

The socket protective door device also comprises a grounding protective door, a three-core protective door and a mountain-shaped single-prevention pressing block; the socket cover is arranged on the top surface of the protective door mounting box, and the socket cover is provided with a grounding upper jack and a three-core upper jack; a grounding lower jack and a three-core lower jack which respectively correspond to the grounding upper jack and the three-core upper jack are arranged on the protective door mounting box, grounding protective door mounting plates are arranged on two sides of the grounding lower jack, and three-core protective door mounting plates are arranged on the inner sides of the three-core lower jacks; the grounding protection door is provided with a grounding door shaft and a grounding protection block for sealing the grounding upper jack; the grounding door shaft is rotatably arranged on the grounding protection door mounting plate and is sleeved with a grounding return spring; the three-core protective door is provided with a three-core door shaft and a three-core protective block for sealing the jacks on the three-core door; the three-core door shaft is rotatably arranged on the three-core protective door mounting plate and sleeved with a three-core return spring; the mountain-shaped single-pressing-block-prevention device is arranged in the protective door mounting box in a sliding manner and comprises a middle vertical plate, two side vertical plates and a transverse plate; the middle vertical plate faces the grounding lower jack and can be pushed by the rotated grounding protection door; the vertical plates at two sides are used for supporting under the three-core protective door; and a single-pressing block prevention reset spring is arranged between the transverse plate and the inner wall of the protective door mounting box.

Further, the three-core protective door is provided with an arc-shaped supporting end.

Furthermore, a sliding groove is arranged on the transverse plate; a limiting bulge matched with the sliding groove is arranged in the protective door mounting box; spring mounting columns are arranged on the transverse plate and the inner wall of the protective door mounting box; two ends of the single-pressing block prevention reset spring are respectively sleeved on the spring mounting columns.

The invention has the beneficial effects that:

1. for the two-core structure adopting the balanced type single-pressure preventing structure, if the insertion pin is inserted into the insertion hole on the two cores on one side, the integral type two-core protective door is subjected to single-side pressure, because the single-pressure preventing support rod is supported below the integral type two-core protective door, the stressed side moves downwards, the non-stressed side moves upwards and is clamped in the insertion hole on the two cores on the side, the two-core protective door is difficult to open, and the single-pressure prevention is realized; if the two-chip upper jacks on the two sides are inserted with the contact pins at the same time, the two sides of the integral two-chip protective door are stressed in a balanced manner, and can turn downwards and move along the single-pressing preventing support rod under the action of the contact pins to expose the two-chip lower jacks, and the contact pins can penetrate through the two-chip upper jacks and the two-chip lower jacks and extend into the conductive sheet; after the contact pin is pulled out, the integral two-core protective door resets under the elastic action of the elastic resetting structure, and the two-core protective block seals the two-core upper jack;

2. for the two-core structure adopting the linkage type single-pressure preventing structure, if the insertion pin is inserted into the insertion hole on the two cores on the single side, the single-side split two-core protective door is stressed, and because the supporting block on the linkage rod on the opposite side is supported below the split two-core protective door, the split two-core protective door is difficult to open, and the single-pressure preventing is realized; if the two-chip upper jacks at the two sides are inserted with the contact pins at the same time, the two-chip split type protection doors at the two sides are stressed at the same time to generate a rotating trend, the poking plate applies force to the linkage rod to move the linkage rod, the two-chip split type protection doors at the two sides lose support at the same time and turn downwards to expose the two-chip lower jacks, and the contact pins can penetrate through the two-chip upper jacks and the two-chip lower jacks and extend into the conductive sheet; after the contact pin is pulled out, the split type two-core protective door is reset under the elastic action of the elastic reset structure, and the two-core protective block seals the two-core upper jack;

3. for the three-core structure, the zero line contact pin or the live wire contact pin is inserted into the three-core protective door, and the three-core protective door is difficult to rotate and open due to the supporting effect of the T-shaped single-pressing prevention block, so that the single-pressing prevention is realized; when only three contact pins are inserted into the jacks simultaneously, the grounding protection door is stressed to rotate to push the T-shaped single-prevention pressing block, the three-chip protection door loses support and is rotated to be opened, and the contact pins can penetrate through the upper jacks and the lower jacks to extend into the conductive sheet; after the contact pin is pulled out, the grounding protection door and the three-core protection door reset respectively under the action of the grounding return spring and the three-core return spring, and the T-shaped anti-single-pressing block resets under the action of the anti-single-pressing block return spring and is supported below the three-core protection door.

Drawings

Fig. 1 is an external view of a socket protective door apparatus provided in the present invention;

fig. 2 is an internal structure view of a combined type socket protective door apparatus of embodiments 1 and 7;

FIG. 3 is a schematic view of FIG. 2 without the two-core protective door installed;

FIG. 4 is another directional view of FIG. 3;

FIG. 5 is a view showing the engagement of the trapezoidal slider and the socket cover in embodiment 1;

FIG. 6 is a schematic view showing the structure of an integrated two-core protective door according to example 1;

fig. 7 is an internal structure view of a combined type socket protective door apparatus of

embodiments

2 and 8; fig. 8 is an internal structural view (closed state) of a combined type socket protective door apparatus of embodiment 2 and embodiment 7;

fig. 9 is an internal structural view (opened state) of a combined type socket protective door apparatus of embodiment 2 and embodiment 7;

FIG. 10 is a schematic view showing the structure of a socket cover in embodiment 2;

FIG. 11 is a schematic view showing the structure of an integrated two-core protective door according to example 2;

FIG. 12 is a schematic structural view of a T-shaped anti-monodispersion block in examples 7 and 8;

fig. 13 is an internal structural view of a combined socket protection door apparatus according to

embodiments

3 and 9;

FIG. 14 is a schematic structural view of a mountain shaped anti-singlepress block of example 9;

FIG. 15 is a view showing the combination of a two-core split protective door, a linkage rod and a socket cover in example 3;

FIG. 16 is a view of the split two-core protective door and linkage of FIG. 15;

FIG. 17 is a schematic view of the split two-core shutter of FIG. 15;

FIG. 18 is an engagement view of the linkage rod of FIG. 15;

FIG. 19 is another directional view of FIG. 18;

fig. 20 is a schematic structural view of the protective door mounting box of fig. 13;

FIG. 21 is a view showing the combination of a two-core split protective door, a link bar and a socket cover in example 4;

FIG. 22 is a view showing a combination of a two-core split protective door, a link bar and a socket cover in example 5;

FIG. 23 is a view of the split two-core protective door and linkage of FIG. 22;

FIG. 24 is an engagement view of the linkage rod of FIG. 22;

FIG. 25 is a drawing showing a combination of a split type two-core protective door, a linkage rod, and a protective door mounting box in example 6;

FIG. 26 is a view of the split two-core protective door and linkage of FIG. 25;

FIG. 27 is an assembled view of the linkage bar of FIG. 25;

fig. 28 is a schematic structural view of the split two-core protective door in example 5 and example 6.

In the figure: 1-a socket cover; 1.1-two cores and upper jacks; 1.2-a second limit groove; 1.3-lateral spacing groove; 1.4-grounded upper jack; 1.5-three-core upper jack; 1.6-door shaft bracket;

2.1-integral two-core protective door; 2.11-two-core protection block of integral two-core protection door; 2.12-two-core avoiding groove of integral two-core protective door; 2.13-two-core door shaft of the integrated two-core protective door; 2.14-arc groove; 2.15-two-core reset spring mounting plate;

2.2-split type two-core protective door; 2.21-two-core protection block of split type two-core protection door; 2.22-two-core door shaft of the split two-core protective door; 2.23-a toggle plate;

3-protecting the door mounting box; 3.1-single-pressing prevention support rod; 3.2-two-core lower jack; 3.3-first limiting groove; 3.4-grounded lower jack; 3.5-three-core lower jack; 3.6-a grounding protection door mounting plate; 3.7-three-core protective door mounting plate; 3.8-limiting bulge; 3.9-arc slide rail; 3.10-restriction column;

4-a trapezoidal slider; 4.1-two core door shaft mounting grooves;

5-a V-shaped elastic plate; 6-two-core return spring; 7-a connecting rod; 8-spring mounting posts; 9-a grounded protective gate; 9.1-grounded door spindle; 9.2-ground protection block; 10-a three-core protective door; 10.1-three-core door spindle; 10.2-three-core protection block; 10.3-support end; 11-T-shaped anti-single pressing block; 11.1-T-shaped three-core door shaft avoiding groove for preventing single pressing block; 11.2-chute of the T-shaped anti-single pressing block; 12-a three-core return spring; 13-single-press block prevention return spring; 14-a support block; 15-a first linkage rod; 15.1-engaging grooves; 16-a second linkage rod; 17-a slide rail groove; 18-force bearing inclined plane; 19-a third linkage rod; 20-a fourth linkage rod; 21-a fifth linkage rod; 22-a sixth linkage bar; 22.1 — lower bump; 23-mountain-shaped anti-single pressing block.

The detailed structure of the present invention will be described below with reference to the embodiments and the drawings thereof, but the present invention is not limited to the embodiments, and various combinations or single embodiments within the framework of the design idea of the present invention are within the effective protection scope.

Detailed Description

Example 1

The present embodiment provides a socket protection door apparatus, as shown in fig. 2 to 6, including a socket cover 1, a protection door mounting box 3 and a balanced anti-single-pressure structure; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and the socket cover 1 is provided with two-core upper jacks 1.1; the protective door mounting box 3 is provided with a two-core lower jack 3.2 corresponding to the two-core upper jack 1.1; the balanced type single-pressure preventing structure comprises an integral two-core protective door 2.1 and a single-pressure preventing support rod 3.1 arranged on a protective door mounting box 3; the single-pressing prevention supporting rod 3.1 is positioned on the perpendicular bisector of the two-core lower jack 3.2, and the top surface is arc-shaped; the integral two-core protective door 2.1 is provided with a two-core protective block 2.11 for sealing the jack 1.1 on the two cores, and a two-core avoiding groove 2.12 and a two-core door shaft 2.13 which are respectively positioned at two sides of the two-core protective block 2.11; the two-core avoiding groove 2.12 is positioned between the two-core protecting blocks 2.11; the two-core door shaft 2.13 is rotatably arranged in a space enclosed by the socket cover 1 and the protective door mounting box 3, an arc-shaped groove 2.14 for accommodating the single-pressure preventing support rod 3.1 is arranged on the two-core door shaft 2.13, and the central line of the arc-shaped groove 2.14 and the central line of the two-core avoiding groove 2.12 are both positioned on a central vertical line of the connection line of the two-core upper jacks 1.1; the integral two-core protective door 2.1 is reset through the elastic reset structure after the two-core plug is pulled out.

The balanced type single-pressure preventing structure comprises first limiting grooves 3.3 arranged at two sides of a single-pressure preventing supporting rod 3.1 and a trapezoidal sliding block 4 arranged in the first limiting grooves 3.1 in a sliding manner; the elastic reset structure comprises a V-shaped elastic plate 5 and a two-core reset spring 6; a first side plate of the V-shaped elastic plate 5 is inserted into the inclined plane of the trapezoidal sliding block 4, and a second side plate is propped against the lower side surface of the two-core protective door 2; the first end of the two-core reset spring 6 is connected with the back surface of the trapezoidal sliding block 4 opposite to the inclined surface, and the second end is connected with the inner wall of the protective door mounting box 3.

If the single-side two-core upper jack 1.1 is inserted with a contact pin, the integral two-core protective door 2.1 is pressed by a single side, because the single-pressure-preventing support rod 3.1 is supported below the integral two-core protective door 2.1, the stressed side moves downwards, the unstressed side moves upwards and is clamped in the two-core upper jack 1.1 at the side, the integral two-core protective door 2.1 is difficult to open, and the single pressure prevention is realized; if the contact pin is inserted into two sides of the integral two-chip protective door 2.1 at the same time, the two sides of the integral two-chip protective door 2.1 are stressed in a balanced manner, and can be turned downwards and move along the single-pressure-preventing support rod 3.1 at the same time under the action of the contact pin, the trapezoidal sliding block 4 is moved by extruding the V-shaped elastic plate 5, the two-chip return spring 6 is compressed, the two-chip lower jack 3.2 is exposed, and the contact pin can penetrate through the two-chip upper jack 1.1 and the two-chip lower jack 3.2 and extend into the conductive sheet; after the contact pin is pulled out, the two-core reset spring 6 resets to push the trapezoidal sliding block 4 back to the original position, the V-shaped elastic plate 5 resets to jack up the integral two-core protective door 2.1, and the two-core protective block 2.11 seals the two-core upper jack 1.1.

Further, a second limit groove 1.2 corresponding to the first limit groove 3.3 is arranged on the inner wall of the socket cover 1; the top surface of the trapezoidal sliding block 4 is abutted against the second limiting groove 1.3, so that the trapezoidal sliding block 4 is prevented from deviating in the moving process.

Furthermore, the two trapezoidal sliding blocks 4 are connected through a connecting rod 7; two ends of the connecting rod 7 penetrate through the trapezoidal sliding block 4 and are inserted into the lateral limiting groove 1.3 on the inner wall of the socket cover 1. The connecting rod 7 ensures the synchronous movement of the two trapezoidal sliding blocks 4, and the single-pressing prevention effect is enhanced.

Further, spring mounting columns 8 are arranged on the back surface of the trapezoidal sliding block 4 and the inner wall of the protective door mounting box 3; two ends of the two-core reset spring 6 are respectively sleeved outside the spring mounting column 8, so that the two-core reset spring 6 is positioned and mounted.

Furthermore, an arc-shaped two-core door spindle mounting groove 4.1 is arranged on the trapezoidal sliding block 4.

Example 2

The present embodiment provides a socket protection door apparatus, as shown in fig. 7 to 12, including a socket cover 1, a protection door mounting box 3, and a balanced anti-single-pressure structure; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and the socket cover 1 is provided with two-core upper jacks 1.1; the protective door mounting box 3 is provided with a two-core lower jack 3.2 corresponding to the two-core upper jack 1.1; the balanced type single-pressure preventing structure comprises an integral two-core protective door 2.1 and a single-pressure preventing support rod 3.1 arranged on a protective door mounting box 3; the single-pressing prevention supporting rod 3.1 is positioned on the perpendicular bisector of the two-core lower jack 3.2, and the top surface is arc-shaped; the integral two-core protective door 2.1 is provided with a two-core protective block 2.11 for sealing the jack 1.1 on the two cores, and a two-core avoiding groove 2.12 and a two-core door shaft 2.13 which are respectively positioned at two sides of the two-core protective block 2.11; the two-core avoiding groove 2.12 is positioned between the two-core protecting blocks 2.11; the two-core door shaft 2.13 is rotatably arranged in a space enclosed by the socket cover 1 and the protective door mounting box 3, an arc-shaped groove 2.14 for accommodating the single-pressure preventing support rod 3.1 is arranged on the two-core door shaft 2.13, and the central line of the arc-shaped groove 2.14 and the central line of the two-core avoiding groove 2.12 are both positioned on a central vertical line of the connection line of the two-core upper jacks 1.1; the integral two-core protective door 2.1 is reset through the elastic reset structure after the two-core plug is pulled out.

The balanced type single-pressure preventing structure comprises first limiting grooves 3.3 arranged at two sides of a single-pressure preventing supporting rod 3.1; the elastic reset structure comprises a two-core reset spring 6; a two-core reset spring mounting plate 2.15 is arranged on a two-core door shaft 2.13 of the integral two-core protective door 2.1; spring mounting columns 8 are arranged on the two-core reset spring mounting plate 2.15 and the inner wall of the first limiting groove 3.3; two ends of the two-core reset spring 6 are respectively sleeved outside the spring mounting column 8.

If the single-side two-core upper jack 1.1 is inserted with a contact pin, the integral two-core protective door 2.1 is pressed by a single side, because the single-pressure-preventing support rod 3.1 is supported below the two-core protective door 2, the stressed side moves downwards, the unstressed side moves upwards and is clamped in the two-core upper jack 1.1 at the side, the integral two-core protective door 2.1 is difficult to open, and the single pressure prevention is realized; if the contact pin is inserted into two sides of the integral two-chip protective door 2.1 at the same time, the two sides of the integral two-chip protective door 2.1 are stressed in a balanced manner, and can be turned downwards and simultaneously move along the single-pressure-preventing support rod 3.1 under the action of the contact pin, the two-chip reset spring 6 is compressed, the two-chip lower jack 3.2 is exposed, and the contact pin can penetrate through the two-chip upper jack 1.1 and the two-chip lower jack 3.2 and extend into the conductive sheet; after the contact pin is pulled out, the two-core reset spring 6 resets to jack up the two-core protective door 2, and the two-core protective block 2.1 seals the two-core upper jack 1.1.

Further, the two-core door spindle 2.13 is rotatably disposed in the door spindle frame 1.6 of the socket cover 1 and can slide along the door spindle frame 1.6.

Example 3

The present embodiment provides a socket protection door apparatus, as shown in fig. 13 to 20, including a socket cover 1, a protection door mounting box 3 and a linkage type anti-single-pressure structure; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and the socket cover 1 is provided with two-core upper jacks 1.1; the protective door mounting box 3 is provided with a two-core lower jack 3.2 corresponding to the two-core upper jack 1.1; the linkage type single-pressure preventing structure comprises a split type two-core protective door 2.2, a linkage rod and a door shaft frame 1.6; two core protection blocks 2.21 and two core door shafts 2.22 are arranged on the two split type two core protection doors 2.2; the two-core door shaft 2.22 is rotatably arranged in the door shaft frame 1.6, can slide along the door shaft frame 1.6 and is provided with a poking plate 2.23 for applying force to the linkage rod to move the linkage rod; the two linkage rods are stacked and provided with supporting blocks 14 for supporting the opposite side split type protection door 2.2; the split type two-core protective door 2.2 resets through the elastic resetting structure after the two-core plug is pulled out.

The door shaft frame 1.6 is arranged on two sides of the jack 1.1 on the two cores; the linkage type single-pressure preventing structure also comprises an arc-shaped sliding rail 3.9 arranged in the protective door mounting box 3; the linkage rods comprise a first linkage rod 15 and a second linkage rod 16, and sliding rail grooves 17 matched with the arc-shaped sliding rails 3.9 are formed in the first linkage rod 15 and the second linkage rod 16; the first linkage rod 15 is of an L-shaped structure, a supporting block 14 is arranged at the end part of the vertical rod, an occlusion groove 15.1 is arranged at the lower side of the vertical rod, and a stress inclined plane 18 which is contacted with the toggle plate 2.23 is arranged at the end part of the transverse rod; the second linkage rod 16 comprises two sections of transverse rods and a vertical rod for connecting the two sections of transverse rods, a supporting block 14 is arranged at the end part of one section of transverse rod, a stress inclined plane 18 which is contacted with the poking plate 2.23 is arranged at the end part of the other section of transverse rod, and an occlusion groove 15.1 of the first linkage rod 15 is lapped on the vertical rod of the second linkage rod 16; the elastic reset structure comprises a two-core reset spring 6, and two ends of the two-core reset spring 6 are respectively connected with the linkage rod and the inner wall of the protective door mounting box 3.

If the insertion pin is inserted into the single-side two-core upper insertion hole 1.1, the single-side split two-core protective door 2.2 is stressed, and the supporting block 14 on the opposite-side linkage rod is supported below the split two-core protective door 2.2, so that the split two-core protective door 2.2 is difficult to open, and single pressure prevention is realized; if the two-chip upper jacks 1.1 on the two sides are inserted with the contact pins at the same time, the two-chip split type protection doors 2.2 on the two sides are stressed at the same time to generate a rotating trend, the poking plate 14 applies force to the stressed inclined plane 18 to enable the linkage rod to move along the arc-shaped slide rail 3.9 and press the two-chip reset spring 6 at the same time, the two-chip split type protection doors 2.2 on the two sides lose support at the same time and turn downwards to expose the two-chip lower jacks 3.2, and the contact pins can penetrate through the two-chip upper jacks 1.1 and the two-chip lower jacks 3.; after the contact pin is pulled out, the two-core reset spring 6 jacks the linkage rod back to the original position, and the stress inclined plane 18 of the linkage rod jacks the split type two-core protective door 2.2 for resetting.

Further, spring mounting columns 8 are arranged on the linkage rod and the inner wall of the protective door mounting box 3; two ends of the two-core reset spring 6 are respectively sleeved outside the spring mounting column 8, so that the two-core reset spring 6 is positioned and mounted.

Example 4

However, in practical production, due to the change of the specification of the socket and the standard identification of the national three-C certification of the socket, the two sliding structures of the embodiment 2 and the embodiment 3 cannot meet the requirement of production, for example, in wall plug, the national standard has strict regulations on the size of the 118 type socket, but the two methods obviously have larger requirement on the space at the rear part of the socket, and in order to prevent the deformation of the two-core protection door, the two-core protection door needs to be made wider, thus occupying a larger distance, and in addition, the two-core protection door needs to slide backwards, and in addition, the two-core return spring 6 needs to make the required space more than 8 mm, so that the internal space obviously cannot be suitable for the 118 type socket, in order to occupy the space behind the socket without sliding, for example, fig. 21, the two-core shaft 2.22 in the embodiment 3 is fixedly installed in the door shaft bracket 1.6 by rotating, namely, the protection door is changed into a rotating type, that is installed, when the pins of the plug press down the protective door, the protective door rotates downwards, thus effectively saving the rear space.

Example 5

In some row socket production, the protective door mounting box 3 is additionally mounted, and the space at the rear part of the protective door mounting box is still very limited, so that the structure described in embodiment 4 can save space, but still cannot well meet production requirements, and in order that two plugs are inserted into a socket without mutual interference, the space at two sides of the socket is very wide, the socket protective door device provided in this embodiment and embodiment 6 fully utilizes the space at two sides of the socket, and the split type two-core protective door 2.2 is designed to be in a pair-opening type.

The present embodiment provides a socket protective door device, as shown in fig. 22 to 24 and 28, including a socket cover 1, a protective door mounting box 3 and a linkage type anti-single-pressure structure; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and the socket cover 1 is provided with two-core upper jacks 1.1; the protective door mounting box 3 is provided with a two-core lower jack 3.2 corresponding to the two-core upper jack 1.1; the linkage type single-pressure preventing structure comprises a split type two-core protective door 2.2, a linkage rod and a door shaft frame 1.6; two core protection blocks 2.21 and two core door shafts 2.22 are arranged on the two split type two core protection doors 2.2; the two-core door shaft 2.22 is rotatably arranged in the door shaft frame 1.6 and is provided with a poking plate 2.23 for applying force to the linkage rod to move the linkage rod; the two linkage rods are stacked and provided with supporting blocks 14 for supporting the opposite side split type protection door 2.2; the split type two-core protective door 2.2 resets through the elastic resetting structure after the two-core plug is pulled out.

The door shaft frame 1.6 is arranged at the outer side of the jack 1.1 on the two cores; the linkage rods comprise a third linkage rod 19 and a fourth linkage rod 20; the third linkage rod 19 comprises two longitudinal rods and a transverse rod for connecting the two longitudinal rods, one longitudinal rod is clamped between the door shaft frames 1.6 and positioned at the outer side of the split type two-core protective door 2.2, a stress inclined plane 18 contacted with the poking plate 2.23 is arranged, and the other longitudinal rod is provided with a supporting block 14 and an upper clamping groove; the fourth linkage rod 20 comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames 1.6 and positioned at the outer side of the split type two-core protective door 2.2, a stress inclined plane 18 contacted with the poking plate 2.23 is arranged, and the other section of longitudinal rod is provided with a supporting block 14 and a lower clamping groove; the transverse rod of the third linkage rod 19 is clamped in the lower clamping groove, and the transverse rod of the fourth linkage rod 20 is clamped in the upper clamping groove; the elastic reset structure comprises a two-core reset spring 6, and two ends of the two-core reset spring 6 are respectively connected with the longitudinal rods of the third linkage rod 19 and the fourth linkage rod 20 provided with the supporting blocks 14.

If the insertion pin is inserted into the single-side two-core upper insertion hole 1.1, the single-side split two-core protective door 2.2 is stressed, and the supporting block 14 on the opposite-side linkage rod is supported below the split two-core protective door 2.2, so that the split two-core protective door 2.2 is difficult to open, and single pressure prevention is realized; if the two-core upper jacks 1.1 on the two sides are inserted with the contact pins at the same time, the two-core split type protection doors 2.2 on the two sides are stressed at the same time to generate a rotating trend, the poking plate 14 applies force to the stressed inclined plane 18 to enable the linkage rod to move outwards and press the two-core reset spring 6 at the same time, the two-core split type protection doors 2.2 on the two sides lose support at the same time and turn downwards to expose the two-core lower jacks 3.2, and the contact pins can penetrate through the two-core upper jacks 1.1 and the two-core lower jacks 3.2 to extend into the conductive; after the contact pin is pulled out, the two-core reset spring 6 jacks the linkage rod back to the original position, and the stress inclined plane 18 of the linkage rod jacks the split type two-core protective door 2.2 for resetting.

Further, the spring mounting posts 8 are provided on the longitudinal rods of the third and fourth link levers 19 and 20 provided with the support blocks 14.

Example 6

The present embodiment provides a socket protective door device, as shown in fig. 25 to 28, including a socket cover 1, a protective door mounting box 3 and a linkage type anti-single-pressure structure; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and the socket cover 1 is provided with two-core upper jacks 1.1; the protective door mounting box 3 is provided with a two-core lower jack 3.2 corresponding to the two-core upper jack 1.1; the linkage type single-pressure preventing structure comprises a split type two-core protective door 2.2, a linkage rod and a door shaft frame 1.6; two core protection blocks 2.21 and two core door shafts 2.22 are arranged on the two split type two core protection doors 2.2; the two-core door shaft 2.22 is rotatably arranged in the door shaft frame 1.6 and is provided with a poking plate 2.23 for applying force to the linkage rod to move the linkage rod; the two linkage rods are stacked and provided with supporting blocks 14 for supporting the opposite side split type protection door 2.2; the split type two-core protective door 2.2 resets through the elastic resetting structure after the two-core plug is pulled out.

The door shaft frame 1.6 is arranged at the outer side of the two-core lower jack 3.2; the linkage rods comprise a fifth linkage rod 21 and a sixth linkage rod 22; the fifth linkage rod 21 comprises two longitudinal rods and a transverse rod for connecting the two longitudinal rods, one longitudinal rod is clamped between the door shaft frames 1.6 and positioned at the outer side of the split type two-core protective door 2.2, a stress inclined plane 18 contacted with the poking plate 2.23 is arranged, and the other longitudinal rod is provided with a supporting block 14; the sixth linkage rod 22 comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames 1.6 and positioned at the outer side of the split type two-core protective door 2.2, a stress inclined plane 18 contacted with the poking plate 2.23 is arranged, and the other section of longitudinal rod is provided with a supporting block 14 and a lower convex block 22.1; the transverse rod of the sixth linkage rod 22 is overlapped on the transverse rod of the fifth linkage rod 21 and clamped in the limiting column 3.10 in the protective door mounting box 3, and the lower convex block 22.1 of the sixth linkage rod 22 is clamped outside the transverse rod of the fifth linkage rod 21; the elastic reset structure comprises a two-core reset spring 6, the first end of the two-core reset spring 6 is connected with the longitudinal rod of the fifth linkage rod 21 or the sixth linkage rod 22 provided with the stress inclined plane 18, and the second end is connected with the inner wall of the protective door mounting box 3.

Further, spring mounting columns 8 are arranged on the longitudinal rods of the fifth linkage rod 21 and the sixth linkage rod 22, which are provided with the stress inclined planes 18, and the spring mounting columns 8 are arranged on the inner wall of the protective door mounting box 3.

Example 7

The present embodiment provides a socket protection door apparatus, as shown in fig. 2 to 4, 8, 9 and 12, including a socket cover 1, a protection door mounting box 3, a grounding protection door 9, a three-core protection door 10 and a T-shaped anti-blocking block 11; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and a grounding upper jack 1.4 and a three-core upper jack 1.5 are arranged on the socket cover 1; a grounding lower jack 3.4 and a three-core lower jack 3.5 which are respectively corresponding to the grounding upper jack 1.4 and the three-core upper jack 1.5 are arranged on the protective door mounting box 3, a grounding protective door mounting plate 3.6 is arranged on two sides of the grounding lower jack 3.4, and a three-core protective door mounting plate 3.7 is arranged on two sides of the three-core lower jack 3.5; the grounding protection door 9 is provided with a grounding door shaft 9.1 and a grounding protection block 9.2 for sealing the grounding upper jack 1.4; the grounding door shaft 9.1 is rotatably arranged on the grounding protection door mounting plate 9 and is sleeved with a grounding return spring; the three-core protective door 10 is provided with a three-core door shaft 10.1 and a three-core protective block 10.2 for sealing the three-core upper jack 1.5; the three-core door shaft 10.1 is rotatably arranged on the three-core protective door mounting plate 3.7 and sleeved with a three-core return spring 12; the T-shaped single-pressing-prevention block 11 is arranged in the protective door mounting box 3 in a sliding mode and comprises a vertical plate and a transverse plate; the vertical plate faces the grounding lower jack 3.4 and can be pushed by the rotated grounding protection door 9; the transverse plate is used for supporting below the three-core protective door 10, and a single-pressing block prevention return spring 13 is arranged between the transverse plate and the inner wall of the protective door mounting box 3.

The zero line pin or the live wire pin is inserted into the three-core protective door 10, and the three-core protective door 10 is difficult to rotate and open due to the supporting effect of the T-shaped single-pressing prevention block 11, so that the single-pressing prevention is realized; when only three pins are inserted into the jacks simultaneously, the grounding protection door 9 is forced to rotate to push the T-shaped single-pressing prevention block 11, the three-chip protection door 10 loses support and is rotated to be opened, and the pins can penetrate through the upper jacks and the lower jacks to extend into the conductive sheet; after the contact pin is pulled out, the grounding protection door 9 and the three-core protection door 10 respectively reset under the action of a grounding return spring and a three-core return spring 12, and the T-shaped anti-single pressing block 11 resets under the action of an anti-single pressing block return spring 13 and is supported below the three-core protection door 10.

Further, the arc-shaped supporting end 10.3 is arranged at the position where the three-core protective door 10 is contacted with the transverse plate, so that the three-core protective door 10 can be supported by being contacted with the transverse plate, and the T-shaped anti-single-pressing block 11 can be rapidly separated from the T-shaped anti-single-pressing block 11 after the T-shaped anti-single-pressing block 11 moves due to the small arc-shaped contact surface.

Further, a part of the vertical plate is cut from the top surface to the end part to form a three-core door shaft avoiding groove 11.1; the transverse plate is provided with a chute 11.2; and a limiting bulge 3.8 matched with the sliding groove 11.2 is arranged in the protective door mounting box 3.

Further, spring mounting columns 8 are arranged on the transverse plate and the inner wall of the protective door mounting box 3; two ends of the single-pressing block prevention return spring 13 are respectively sleeved on the spring mounting columns 8.

Example 8

When the device described in embodiment 7 is used, to fully insert the pin into the jack, the three-core protective door 10 needs to be turned over to be substantially perpendicular to the protective door mounting box 3, the minimum thickness of the protective door mounting box 3 is required to be the length of the three-core protective door 10, and about 7.5mm, the three-core protective door 10 interferes with a conductive copper sheet inside the socket in the downward turning process, so the copper sheet structure needs to be changed, and thus the mold needs to be opened again, which increases the production cost, and in order to improve the problem, the embodiment provides a side-turning socket protective door device, as shown in fig. 7 and 12, which includes a socket cover 1, the protective door mounting box 3, a grounding protective door 9, the three-core protective door 10 and a T-shaped anti-single-pressing block 11; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and a grounding upper jack 1.4 and a three-core upper jack 1.5 are arranged on the socket cover 1; a grounding lower jack 3.4 and a three-core lower jack 3.5 which are respectively corresponding to the grounding upper jack 1.4 and the three-core upper jack 1.5 are arranged on the protective door mounting box 3, a grounding protective door mounting plate 3.6 is arranged on two sides of the grounding lower jack 3.4, and a three-core protective door mounting plate 3.7 is arranged on the outer side of the three-core lower jack 3.5; the grounding protection door 9 is provided with a grounding door shaft 9.1 and a grounding protection block 9.2 for sealing the grounding upper jack 1.4; the grounding door shaft 9.1 is rotatably arranged on the grounding protection door mounting plate 9 and is sleeved with a grounding return spring; the three-core protective door 10 is provided with a three-core door shaft 10.1 and a three-core protective block 10.2 for sealing the three-core upper jack 1.5; the three-core door shaft 10.1 is rotatably arranged on the three-core protective door mounting plate 3.7 and sleeved with a three-core return spring 12; the T-shaped single-pressing-prevention block 11 is arranged in the protective door mounting box 3 in a sliding mode and comprises a vertical plate and a transverse plate; the vertical plate faces the grounding lower jack 3.4 and can be pushed by the rotated grounding protection door 9; the transverse plate is used for supporting below the three-core protective door 10, and a single-pressing block prevention return spring 13 is arranged between the transverse plate and the inner wall of the protective door mounting box 3.

The difference with the device of embodiment 7 is that the three-core protective door 10 is arranged at the outer side of the three-core lower jack 3.5, the three-core protective door 10 is laterally turned when the pin is inserted, the thickness of the protective door mounting box 3 can be reduced by shortening the width of the three-core protective door 10, at present, the inventor designs the three-core protective door 10 to be 5.5mm, and the arrangement of the conducting strips is not influenced on the basis of realizing single-pressure prevention through inspection.

Example 9

However, for the three-core protective door, the three-core protective door still cannot be placed in the space of the 118-type socket if the three-core protective door is turned outwards, so the embodiment provides an inward-turning type socket protective door device, as shown in fig. 13 and 14, which includes a socket cover 1, a protective door mounting box 3, a grounding protective door 9, a three-core protective door 10 and a chevron-shaped anti-single pressing block 23; the socket cover 1 is arranged on the top surface of the protective door mounting box 3, and a grounding upper jack 1.4 and a three-core upper jack 1.5 are arranged on the socket cover 1; a grounding lower jack 3.4 and a three-core lower jack 3.5 which are respectively corresponding to the grounding upper jack 1.4 and the three-core upper jack 1.5 are arranged on the protective door mounting box 3, a grounding protective door mounting plate 3.6 is arranged on two sides of the grounding lower jack 3.4, and a three-core protective door mounting plate 3.7 is arranged on the inner side of the three-core lower jack 3.5; the grounding protection door 9 is provided with a grounding door shaft 9.1 and a grounding protection block 9.2 for sealing the grounding upper jack 1.4; the grounding door shaft 9.1 is rotatably arranged on the grounding protection door mounting plate 9 and is sleeved with a grounding return spring; the three-core protective door 10 is provided with a three-core door shaft 10.1 and a three-core protective block 10.2 for sealing the three-core upper jack 1.5; the three-core door shaft 10.1 is rotatably arranged on the three-core protective door mounting plate 3.7 and sleeved with a three-core return spring 12; the mountain-shaped single-pressing-prevention block 23 is arranged in the protective door mounting box 3 in a sliding manner and comprises a middle vertical plate, two side vertical plates and a transverse plate; the middle vertical plate faces the grounding lower jack 3.4 and can be pushed by the rotated grounding protection door 9; the vertical plates at two sides are used for supporting under the three-core protective door 10; a single-pressing-block prevention return spring 13 is arranged between the transverse plate and the inner wall of the protective door mounting box 3. Further, the positions of the three-core protective door 10 and the vertical plates at two sides are provided with arc-shaped supporting ends 10.3.

Furthermore, a part of the middle vertical plate is cut from the top surface to the end part to form a three-core door shaft avoiding groove 23.1; the transverse plate is provided with a chute 23.2; and a limiting bulge 3.8 matched with the sliding groove 23.2 is arranged in the protective door mounting box 3.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.

Claims

1. A three-plug and two-plug combined jack hole-exposing-free socket protective door device is characterized by comprising a socket cover, a protective door mounting box and a two-core single-pressure-proof structure;

the socket cover is arranged on the top surface of the protective door mounting box, and two-core upper jacks are formed in the socket cover;

the protective door mounting box is provided with two core lower jacks corresponding to the two core upper jacks;

the two-core single-pressure preventing structure is a balanced single-pressure preventing structure;

the balanced type single-pressure preventing structure comprises an integral two-core protective door and a single-pressure preventing support rod arranged on a protective door mounting box;

the single-pressing prevention support rod is positioned on the perpendicular bisector of the two-core lower jack, and the top surface of the single-pressing prevention support rod is arc-shaped;

the integral two-core protective door is provided with two-core protective blocks for sealing the jacks on the two cores, two-core avoiding grooves and two-core door shafts which are respectively positioned on two sides of the two-core protective blocks;

the two-core avoiding groove is positioned between the two-core protecting blocks;

the two core door shafts are rotatably arranged in a space enclosed by the socket cover and the protective door mounting box, arc-shaped grooves for accommodating the single-pressure-preventing supporting rods are arranged on the two core door shafts, and the central lines of the arc-shaped grooves and the central lines of the two core avoiding grooves are both positioned on a perpendicular bisector of a connecting line of the jacks on the two cores;

the integral two-core protective door resets through the elastic resetting structure after the two-core plug is pulled out;

the balanced type single-pressure preventing structure also comprises first limiting grooves arranged at two sides of the single-pressure preventing supporting rod and a trapezoidal sliding block arranged in the first limiting grooves in a sliding manner;

the elastic reset structure comprises a V-shaped elastic plate and a two-core reset spring;

the first side plate of the V-shaped elastic plate is inserted into the inclined plane of the trapezoidal sliding block, and the second side plate is abutted against the lower side surface of the two-core protective door;

the first end of the two-core reset spring is connected with the back surface of the trapezoidal sliding block opposite to the inclined surface, and the second end of the two-core reset spring is connected with the inner wall of the protective door mounting box;

a second limiting groove corresponding to the first limiting groove is formed in the inner wall of the socket cover;

the top surface of the trapezoidal sliding block is abutted against the second limiting groove;

the two trapezoidal sliding blocks are connected through a connecting rod;

two ends of the connecting rod penetrate through the trapezoidal sliding block and are inserted into the lateral limiting groove in the inner wall of the socket cover.

2. A three-plug and two-plug combined jack hole-exposing-free socket protective door device is characterized by comprising a socket cover, a protective door mounting box and a two-core single-pressure-proof structure;

the balanced type single-pressure preventing structure further comprises first limiting grooves arranged on two sides of the single-pressure preventing supporting rod;

the elastic reset structure comprises a two-core reset spring;

a two-core reset spring mounting plate is arranged on a two-core door shaft of the integral two-core protective door;

spring mounting columns are arranged on the two-core reset spring mounting plate and the inner wall of the first limiting groove;

and two ends of the two-core reset spring are respectively sleeved outside the spring mounting column.

3. A three-plug and two-plug combined jack hole-exposing-free socket protective door device is characterized by comprising a socket cover, a protective door mounting box and a two-core single-pressure-proof structure;

the two-core anti-single-pressure structure is a linkage anti-single-pressure structure;

the linkage type anti-single-pressure structure comprises a split type two-core protective door, a linkage rod and a door shaft frame;

two core protection blocks and two core door shafts are arranged on the two split type two core protection doors;

the two-core door shaft is rotatably arranged in the door shaft frame and is provided with a poking plate for applying force to the linkage rod to move the linkage rod;

the two linkage rods are stacked and provided with supporting blocks for supporting the opposite split type protection doors;

the split type two-core protective door is reset through the elastic reset structure after the two-core plug is pulled out;

the door shaft brackets are arranged on two sides of the jacks on the two cores;

the linkage type anti-single-pressing structure also comprises an arc-shaped sliding rail arranged in the protective door mounting box;

the linkage rods comprise a first linkage rod and a second linkage rod, and sliding rail grooves matched with the arc-shaped sliding rails are formed in the first linkage rod and the second linkage rod;

the first linkage rod is of an L-shaped structure, a supporting block is arranged at the end part of the vertical rod, an occlusion groove is formed in the lower side of the vertical rod, and a stress inclined plane which is in contact with the poking plate is arranged at the end part of the transverse rod;

the second linkage rod comprises two sections of transverse rods and a vertical rod connected with the two sections of transverse rods, a supporting block is arranged at the end part of one section of transverse rod, a stress inclined plane in contact with the poking plate is arranged at the end part of the other section of transverse rod, and the meshing groove of the first linkage rod is lapped on the vertical rod of the second linkage rod;

the elastic reset structure comprises a two-core reset spring, and two ends of the two-core reset spring are respectively connected with the linkage rod and the inner wall of the protective door mounting box.

4. A three-plug and two-plug combined jack hole-exposing-free socket protective door device is characterized by comprising a socket cover, a protective door mounting box and a two-core single-pressure-proof structure;

the door shaft bracket is arranged at the outer side of the jacks on the two cores;

the linkage rod comprises a third linkage rod and a fourth linkage rod;

the third linkage rod comprises two longitudinal rods and a transverse rod for connecting the two longitudinal rods, one longitudinal rod is clamped between the door shaft frames and positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other longitudinal rod is provided with a supporting block and an upper clamping groove;

the fourth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block and a lower clamping groove;

the transverse rod of the third linkage rod is clamped in the lower clamping groove, and the transverse rod of the fourth linkage rod is clamped in the upper clamping groove;

the elastic reset structure comprises two-core reset springs, and two ends of each two-core reset spring are respectively connected with the longitudinal rods, provided with the supporting blocks, of the third linkage rod and the fourth linkage rod.

5. A three-plug and two-plug combined jack hole-exposing-free socket protective door device is characterized by comprising a socket cover, a protective door mounting box and a two-core single-pressure-proof structure;

the door shaft frame is arranged on the outer side of the lower insertion holes of the two cores;

the linkage rods comprise a fifth linkage rod and a sixth linkage rod;

the fifth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block;

the sixth linkage rod comprises two sections of longitudinal rods and a transverse rod for connecting the two sections of longitudinal rods, one section of longitudinal rod is clamped between the door shaft frames and is positioned on the outer side of the split type two-core protective door, a stress inclined plane in contact with the poking plate is arranged, and the other section of longitudinal rod is provided with a supporting block and a lower convex block;

the transverse rod of the sixth linkage rod is stacked on the transverse rod of the fifth linkage rod and clamped in the limiting column in the protective door mounting box, and the lower convex block of the sixth linkage rod is clamped outside the transverse rod of the fifth linkage rod;

the elastic reset structure comprises a two-core reset spring, the first end of the two-core reset spring is connected with the longitudinal rod of which the fifth linkage rod or the sixth linkage rod is provided with a stress inclined plane, and the second end of the two-core reset spring is connected with the inner wall of the protective door mounting box.

6. The receptacle protective door apparatus according to any one of claims 1 to 5, further comprising a ground protective door, a three-core protective door, and a T-shaped anti-monostable block;

the socket cover is arranged on the top surface of the protective door mounting box, and the socket cover is provided with a grounding upper jack and a three-core upper jack;

the protective door mounting box is provided with a grounding lower jack and a three-core lower jack which respectively correspond to the grounding upper jack and the three-core upper jack, two sides of the grounding lower jack are provided with grounding protective door mounting plates, and two sides or the outer sides of the three-core lower jack are provided with three-core protective door mounting plates;

the grounding protection door is provided with a grounding door shaft and a grounding protection block for sealing a grounding upper jack;

the grounding door shaft is rotatably arranged on the grounding protection door mounting plate and is sleeved with a grounding return spring;

the three-core protective door is provided with a three-core door shaft and a three-core protective block for sealing the jacks on the three-core door;

the three-core door shaft is rotatably arranged on the three-core protective door mounting plate and sleeved with a three-core return spring;

the T-shaped single-pressing-prevention block is arranged in the protective door mounting box in a sliding mode and comprises a vertical plate and a transverse plate;

the vertical plate faces the grounding lower jack and can be pushed by the rotated grounding protection door;

the transverse plate is used for being supported below the three-core protective door, and a single-pressing block prevention reset spring is arranged between the transverse plate and the inner wall of the protective door mounting box.

7. The socket protective door device according to any one of claims 1 to 5, further comprising a ground protective door, a three-core protective door, and a mountain shaped anti-monostable block;

the protective door mounting box is provided with a grounding lower jack and a three-core lower jack which respectively correspond to the grounding upper jack and the three-core upper jack, two sides of the grounding lower jack are provided with grounding protective door mounting plates, and the inner sides of the three-core lower jacks are provided with three-core protective door mounting plates;

the mountain-shaped single-pressing-block-preventing device is arranged in the protective door mounting box in a sliding mode and comprises a middle vertical plate, two side vertical plates and a transverse plate;

the middle vertical plate faces the grounding lower jack and can be pushed by the rotated grounding protection door;

the two side vertical plates are used for being supported below the three-core protective door;

and a single-pressing block prevention reset spring is arranged between the transverse plate and the inner wall of the protective door mounting box.

8. The receptacle shutter apparatus of claim 7, wherein the three-core shutter is provided with an arc-shaped support end.

9. The receptacle protective door apparatus according to claim 6, wherein a slide groove is provided on the lateral plate;

a limiting bulge matched with the sliding groove is arranged in the protective door mounting box;

spring mounting columns are arranged on the transverse plate and the inner wall of the protective door mounting box;

and two ends of the single-pressing block prevention reset spring are respectively sleeved on the spring mounting columns.

10. The receptacle protective door apparatus according to claim 7, wherein a slide groove is provided on the lateral plate;