CN107611715B

CN107611715B - Safety socket

Info

Publication number: CN107611715B
Application number: CN201710956569.9A
Authority: CN
Inventors: 周士琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-10-16
Filing date: 2017-10-16
Publication date: 2024-02-27
Anticipated expiration: 2037-10-16
Also published as: CN107611715A

Abstract

The invention discloses a safety socket which is used for a three-pin plug with a grounding electrode column longer than the other two electrode columns, and comprises a grounding electrode, a zero line electrode and a fire wire electrode, wherein a plug electrode through hole is formed in the grounding electrode pair at the position of the grounding electrode column; the safety socket further includes: the pressure-bearing body is positioned at the front end of the ground electrode column in the action direction and acts on the ground electrode column, and at least one side facing the ground electrode column is made of an insulating material; the movable contact piece is fixed or jointed at one end of the pressure-bearing body far away from the grounding electrode column and is connected with one of the fire wire electrode or the fire wire power wire; the static contact piece is opposite to the movable contact piece, is provided with a movable closing gap, and is connected with the other one of the live wire electrode or the live wire power wire; and a reset structure or device for resetting the movable contact. The socket provided by the invention has the advantages that the reliability is ensured, and meanwhile, the safety is very good.

Description

Safety socket

Technical Field

The invention relates to a safety socket, and belongs to a socket for preventing teenagers and children from electric shock.

Background

There are several types of safety sockets, one of which is a socket designed specifically for protecting child safety, commonly referred to as a child safety socket. Child safety sockets are distinguished in principle, mainly in two types, one type is purely mechanical, the other type is purely electronic, and along with the development of technology, a mechanical electronic type is also developed.

Although safety sockets are of a wide variety, the most widely used safety sockets are still mechanical, and the most commonly used safety sockets are in principle very simple, and are constructed by using a cam mechanism. In general, there are two structures of the plug electrode column, one is a cylindrical electrode column and the other is a sheet electrode column, but whichever electrode column has a lead structure at its head end, for example, a cylindrical electrode column, the head end of which is usually a ball head, and for the sheet electrode column, the head end of which is usually a round head. Accordingly, the most widely used safety socket has a blade structure having three corresponding fins shielding the socket insertion holes at one end in the direction of the two defined ends, the end of the fins having inclined surfaces in the direction of the two defined ends, and a spring at the other end in the direction of the two defined ends. When the plug is inserted, the head of the electrode column is matched with the inclined plane on the fin to generate a certain pressure angle, so that the sheet structure can be subjected to a horizontal component force to push away the sheet structure from the position of the shielding jack. When the plug is pulled out, the fins are reset to shield the jack under the reset force provided by the spring.

Despite the wide variety of safety sockets, the mechanical safety sockets mentioned in the previous paragraph occupy almost 95% of the entire market share, in that they are very simple in construction, low in cost, and have a relatively high market share. However, there is an inherent disadvantage that the movement of the blade structure depends on the strength of the plug insertion, and the force of the child is considered to be relatively small, however, due to the defects of the structure and the manufacturing process, many plugs are difficult to insert, even cannot be inserted at all, and most of the public encounters the situation that despite the various methods, the plugs cannot be inserted.

The above problem is caused by the fact that the sheet structure is in contact with other parts in the socket, and because the safety socket is usually an injection molding part, the injection molding part is relatively large in inconsistency of the surface or structure due to the technical reasons, and the insertion force of the safety socket in mass production is quite different.

Compared with a mechanical safety socket which is difficult to insert, the electronic safety socket has no constraint of a mechanical structure, and the jack is not shielded. The electronic safety socket is mainly controlled by a small solid state relay of an individual, the solid state relays of a zero line electrode and a fire line electrode are interlocked, and only if two electrodes are inserted simultaneously, power can be transmitted. The children can insert foreign matters into one hole at the same time in habit, so that the safety socket can be pulled out and inserted very easily while ensuring safety. However, although the safety socket has better safety and easier plugging, the market share is very small due to the high price. In addition, relay control is adopted, so that the influence of the environment is relatively large. And its maintainability is relatively poor, for mechanical safety sockets, the structure is generally apparent after disassembly, both with and without the machine, while for electronic safety sockets, once damaged, they are essentially in a non-serviceable condition.

Therefore, the mechanical safety socket with the highest market share is still the mechanical safety socket with the highest market share, and various changes are made on the basis of the sheet-type structure, but the market share is limited, for example, CN102290691a, which in principle requires that the two power supply inserting sheets unlock when the acting forces of the two clamping pieces are relatively uniform, however, as described above, when a user inserts a plug, the two electrode columns are difficult to be completely perpendicular to the socket, that is, the force application is difficult to be uniform, and the unlocking cannot be effectively performed.

In some implementations, the safety socket is configured with a manual switch for each socket, the manual switch is configured on the hot wire, the switch is closed, and the jack corresponding to the hot wire is powered on. The object is also that children have little logic in understanding things, and do not first press the switch and then insert foreign matter. However, for adult electricity, there is a case where the switch is pressed down when electricity is used, but it is not necessarily thought that the switch should be broken when electricity is not used.

It should be noted that, although the aforementioned safety socket with a sheet-type structure has such or other drawbacks in use, its market share is very large, its root cause is that its structure is very simple, not only cost is low, but also the failure rate is very low in practice due to its simple structure, few links.

Disclosure of Invention

In view of the above, the present invention still starts from the viewpoint of simple structure, and provides a mechanical safety socket with simple structure, which ensures reliability and good safety.

According to the embodiment of the invention, a safety socket is provided, which is used for a three-pin plug with a grounding electrode column longer than the other two electrode columns, and comprises a grounding electrode, a zero line electrode and a fire line electrode, wherein a plug electrode through hole is formed in the grounding electrode pair at the position of the grounding electrode column; the safety socket further includes:

the pressure-bearing body is positioned at the front end of the ground electrode column in the action direction and acts on the ground electrode column, and at least one side facing the ground electrode column is made of an insulating material;

the movable contact piece is fixed or jointed at one end of the pressure-bearing body far away from the grounding electrode column and is connected with one of the fire wire electrode or the fire wire power wire;

the static contact piece is opposite to the movable contact piece, is provided with a movable closing gap, and is connected with the other one of the live wire electrode or the live wire power wire; and

and the reset structure or device is used for resetting the movable contact.

Above-mentioned safety socket, optionally, movable contact and reset structure integrate into a main reed, and this main reed includes:

the mounting part is fixedly connected with the pressure-bearing body, and one side of the mounting part, which is far away from the pressure-bearing body, is constructed as a movable contact piece;

the fixing plate is a structural part for installing the main reed on the safety socket shell.

Optionally, the main reed has:

a first structure: the reed is fixed at one end and is suspended at the other end, wherein the fixing plate is arranged at one end for fixing, and the mounting part is arranged at one end for suspending;

and a second structure: the two ends of the arc structure are respectively provided with a fixed plate, and the middle is provided with a mounting part.

Optionally, in the second structure, the mounting portion is a seat groove with a central hole, and a notch of the seat groove faces the pressure-bearing body;

correspondingly, the pressure-bearing body comprises a mounting seat embedded in the seat groove, and the mounting seat is provided with a blind hole positioned in the central hole;

a fastening screw is provided for fixedly connecting the mounting seat with the seat groove through the central hole and the blind hole.

Optionally, a secondary reed is further disposed on a side of the main reed away from the pressure bearing body, and the secondary reed includes:

the mounting surface is used for attaching and assembling the auxiliary reed and the main reed;

and a curved portion overhanging from the mounting surface.

Optionally, a reverse curve part is arranged at the tail end of the curve part.

Optionally, the auxiliary reed is of a bilateral symmetry structure, the middle part of the bilateral symmetry structure is provided with the mounting surface, and the left and right sides of the mounting surface are respectively provided with a curved part;

the centers of the two curved parts are the same.

Optionally, the main reed, the auxiliary reed and the pressure-bearing body are fixedly connected with each other through the same fastener.

Optionally, a partition board is arranged in the shell of the safety socket, the grounding electrode is arranged on one side surface of the partition board, and the main reed is positioned on the other side of the partition board;

correspondingly, the partition plate is provided with a partition plate via hole for the ground electrode column to pass through.

Optionally, a containing cavity is formed between the partition plate and the bottom shell of the shell, and the main reed is positioned in the containing cavity;

wherein, be formed with the mount pad that protrudes from the drain pan on the drain pan, this mount pad is used for installing main reed.

According to the safety socket of the embodiment of the invention, the corresponding plug is required to have a specific structure, namely the grounding electrode column of the safety socket is relatively long, so as to provide power for the working stroke of the pressure-bearing body. The pressure-bearing body insulated from the grounding electrode is configured as a main seat body and is used for bearing the movable contact, the movable contact and the provided static contact are in a normally open state, and the movable contact and the static contact are closed based on the action of the grounding electrode column. Because the movable contact piece and the static contact piece are correspondingly connected with the live wire electrode or the live wire power line, based on the movable connection, the live wire electrode can be electrically connected with the live wire power line only when a plug is inserted or a ground electrode is inserted to a certain depth, and the probability of inserting the foreign matter into two jacks is relatively low for children, so that the structure has relatively good safety. Meanwhile, the device is of a pure mechanical structure, and realizes the moving and closing based on the linear motion, so that the device has the advantages of simpler action principle and structure, fewer links, lower probability of failure and relatively higher reliability.

Drawings

Fig. 1 is a schematic diagram of a safety socket structure according to an embodiment (most of the housing and socket assembly structures are omitted).

Fig. 2 is an exploded view of the principle of the installation of a socket in one embodiment.

Fig. 3 is a schematic view of a pressure-bearing body.

Fig. 4 is a schematic structural diagram of a static contact.

Fig. 5 is a schematic view of a sub-reed structure.

Fig. 6 is a schematic view of a main reed structure.

Fig. 7 is a schematic view of a grounding electrode structure.

In the figure: 1. the device comprises a pressure-bearing body, an auxiliary reed, a live wire power wire, a shell, a static contact piece, a main reed, a partition board, a grounding electrode, a live wire electrode, a zero wire power wire, a connecting wire and a mounting table.

101. The pressure-bearing part, 102, the mounting seat, 103 and the blind hole.

201. The bent back part, 202, 203, the mounting surface, 204 and the mounting via hole.

501. Mounting holes 502. Sheet.

601. Fixing holes 602, fixing plates 603, reed pieces 604, seat grooves 605 and center holes.

801. Grounding part 802, electrode reed 803, plug electrode via hole 804, mounting hole 805, seat board.

Detailed Description

As is known, the present household outlets are commonly single-phase three-wire or single-phase two-wire outlets, and mainly single-phase three-wire outlets, and in the embodiments of the present invention, safety improvements are mainly proposed for single-phase three-wire outlets. Furthermore, based on this improvement, for single-phase two-wire sockets, it is also possible to use the neutral electrode post to control the electrical connection between the live electrode 9 and the live power line 3.

Since the improvement points are mainly at the ground electrode 8 and the improvement of the controlled structural assembly according to the invention, the rest is mainly the existing structure, so that the parts related to the prior art in the drawings of the specification are omitted to more clearly indicate the corresponding improvement, as shown in fig. 1, the major part of the omission of the shell 4 in fig. 1 can clearly reflect the distribution of the three electrodes and the assembly structure thereof, and the omission of the partition 7 is used for reflecting the parts below the partition 7.

It will be appreciated that although the safety socket is mounted or placed differently, the surface with the socket is generally referred to as the front face, the corresponding plate is generally referred to as the face plate, and the portion of the housing opposite the face plate is generally referred to as the bottom plate, for forming the remainder of the housing 4, generally referred to as the enclosure. For the case 4, which is usually plugged in at the panel, the head end of the enclosure is used for introducing the power cord, and the bottom shell is usually used for being fixed on the wall surface or used as a placement plate, for example, can be placed on the ground or mounted on the wall surface.

As regards the electrodes of the plug, there are mainly two types, one is a cylindrical electrode and the other is a sheet electrode, and in contrast, the market share of the plug with sheet electrodes is relatively large.

The safety socket shown in fig. 1 is an assembly structure of a single socket unit of the safety socket, and a plurality of such socket units can be configured on, for example, a power strip, and each socket unit realizes control of the socket unit through a respective movable component.

For a single-phase three-wire plug, the socket is also a single-phase three-phase socket, and it is understood that for the ground electrode 8, it is usually not electrified, and the "ground" in the ground electrode 8 is a protective ground, rather than a functional ground (the functional ground exists in a three-phase four-wire system or a three-phase five-wire system, and is actually referred to as a neutral wire), so as to avoid the live wire from being connected in series.

In general, if the socket does not fail, the ground electrode 8 is not electrified. Further, since the neutral electrode 10 is generally safe, the control of the safety socket is disposed on the live electrode 9 side.

Correspondingly, in order to achieve one of the purposes of the present invention, the ground electrode column of the plug is required to be longer than the other two electrode columns, and the longer part of the ground electrode column than the other two electrode columns is used for providing opening and closing of the moving component.

As a single-phase three-wire safety socket having at least one set of ground electrode 8, neutral electrode 10 and live electrode 9 within the housing 4, in some embodiments each set being a unit, each unit having one ground electrode 8, one neutral electrode 10 and one live electrode 9.

In other embodiments, each group is used as a unit, each unit is provided with a ground electrode 8, two neutral electrodes 10 and two live electrodes 9, the neutral electrodes 10 and the live electrodes 9 are in one-to-one correspondence, and respectively form a small unit, the two small units in one unit are symmetrical with respect to the ground electrode 8, and when a single-phase three-wire plug is inserted, the other small unit can be used as a single-phase two-wire socket unit.

In fig. 7, the ground electrode 8 has a base plate 805 located below (here, below takes the base plate as a reference direction), and the strip has such a structure that is multipurpose; while in some embodiments the base 805 of the ground electrode 8 may be on the side of the electrode reed 802, the unit socket currently mounted on the wall is most of this type of construction. In the first embodiment, the seat plate 805 needs to be perforated with a plug electrode via 803 as shown in fig. 7, whereas in the second embodiment, the two electrode reeds 802 and their seat plates 805 generally form a U-shaped structure that falls down, so that the plug electrode via is naturally formed without obstruction of the seat plate 805 in the direction in which the plug electrode is inserted. The holes for the zero line electrode posts to pass through in the first and second embodiments are hereinafter referred to as electrode vias.

Correspondingly, the safety socket further comprises a pressure-bearing body 1 directly acted on by the grounding electrode column, a movable contact piece which is arranged on the pressure-bearing body 1 and can be driven along with the pressure-bearing body 1, and a static contact piece 5 which is opposite to the movable contact piece and is arranged in the moving direction of the movable contact piece.

Regarding the pressure-bearing body 1, an insulating material support is needed, and as the applied object is a household socket or a power strip, the power supply voltage belongs to the illumination voltage, the requirement on the insulativity is not high, the electric plastic is generally adequate, particularly, the resin material has better insulativity, and the pressure-bearing body 1 is made of the same plastic material as the shell 4.

The structural requirement of the pressure-bearing body 1 is relatively simple, and mainly the realized movement mode is linear movement, and the pressure-bearing body 1 can be provided with an independent guide structure or can be provided without being provided, if a certain part of the movable contact is fixedly installed under the condition of being fixedly connected with the movable contact, the fixed position of the movable contact can determine the action direction of the movable contact, so that the action direction of the pressure-bearing body 1 is limited.

In some embodiments, if the movable contact is entirely mounted on the pressure body 1, guiding of the pressure body 1 is required. For such guiding, the guiding precision is low, and vertical baffles can be used for guiding, wherein the vertical baffles are vertical to the bottom plate.

The pressure-bearing body 1 may be a single structure or a combined structure, and if the pressure-bearing body is a combined structure, at least one end opposite to the ground electrode column is required to be made of an insulating material.

The movable contact is a contact that moves along with the movement of the pressure-bearing body 1, and may be fixedly connected to the pressure-bearing body 1 or simply bonded to the pressure-bearing body 1. It will be appreciated that the fixed connection of the movable contact with the pressure-bearing body 1 does not mean that it can no longer be fixedly connected with other components, after all the pressure-bearing body 1 is a movable component, whereas the movable contact can be an elastic component or a rigid component, the elasticity meaning that it may have movable parts even if there are a plurality of fixed points.

In the structure shown in fig. 1, the main reed 6 constituting the movable contact includes both a portion fixedly connected to the housing 4 and a portion fixedly connected to the pressure-receiving body 1. When the pressure-bearing body 1 is reliably guided by the housing 4, the movable contact can be fixedly connected only with the pressure-bearing body 1.

With the structure shown in fig. 1, if both ends of the main reed 6 are fixedly connected with the housing 4, the pressure-bearing body 1 may not be fixedly connected with the main reed 6, but only the engagement achieved by interference is generated.

In either assembly mode, the positional relationship between the movable contact and the pressure-bearing body 1 is represented by the movable contact being located at one end of the pressure-bearing body 1 away from the ground electrode column.

The movable contact is connected to one of the live wire electrode 9 or the live wire power supply line 3, and in fig. 1, the main reed 6 constituting the movable contact is electrically connected to the live wire electrode 9 through the fixing screw 16 and the connecting wire 12.

In fig. 1, the live wire power cord 3 is electrically connected with the static contact 5 through the fixing screw 17, and the connecting wire 13 is fixedly connected with the main reed 6 through the fixing screw 16, and the connecting points are all statically connected, so that the live wire power cord is not easy to be damaged due to dynamic fatigue.

For the static contact 5, which is opposite to the movable contact, a movable gap is reserved between the static contact and the movable contact, and the movable gap is not required to be too large because the voltage for realizing breaking is commercial power, especially illumination power, and is generally larger than 2mm, so that the movable gap is controlled to be 3-5 mm for overcoming assembly errors and deformation of the movable contact, and the working stroke of the pressure-bearing body 1 is slightly larger than the movable gap so as to realize reliable electrical connection by utilizing the deformation. In particular, in the structure shown in fig. 1, the movable contact piece is an elastic main reed 6, and the working stroke of the pressure-receiving body 1 may be 1mm larger than the engagement gap.

In fig. 1, the stationary contact 5 is electrically connected to the live power line 3 by a set screw 17.

Because the movable contact piece and the fixed contact piece 5 move linearly, and the movable contact clearance can be smaller based on the mains supply, the structure of the socket or the power strip can be relatively compact.

For the resetting of the movable contact, namely the breaking between the movable contact and the static contact 5, the breaking direction is opposite to the closing direction, and as mentioned above, the breaking state is normal, so that the state of the live wire formed by the movable contact and the static contact 5 is normal. Since the movable contact is in linear motion, in the machine, the resetting of the linear motion member is the simplest resetting, whereby a person skilled in the art can arbitrarily select the resetting of the linear motion member.

Meanwhile, because the movable contact piece and the pressure-bearing body 1 have an assembling or jointing relationship, the reset of the movable contact piece can also bring the reset of the pressure-bearing body 1.

For the reset of the movable contact, if the part for resetting the movable contact is integrated with the movable contact, the reset structure is called as a reset device, and if the part for resetting the movable contact is a separate component, the reset structure is called as a reset device.

With respect to the resetting device, a spring is commonly used in the mechanical field to realize resetting, and because the moving-closing gap is smaller, a small-sized cylindrical spring can be adopted to realize resetting of the moving contact, and the cylindrical spring is arranged between the moving contact and the bottom plate of the shell 4.

Regarding the reset structure, the movable contact and the assembly structure thereof can adopt elastic bodies with elasticity and conductivity, the most common material is brass, and the brass is also the main material for manufacturing the power strip or the socket electrode, and has relatively strong elastic modulus, so the movable contact can be used for embedding the electrode columns by adopting a pair of brass sheets to realize reliable electric connection.

In some embodiments, such as the main reed 6 shown in fig. 1, the material is a spring steel substrate, and the surface is copper plated to improve the conductivity, and the steel itself is a good conductor of electricity. The modulus of elasticity of spring steel is greater relative to copper.

The reed structure is adopted, the self-body can conduct electricity and has certain elasticity, and the integral structure can be simplified.

Fig. 6 shows a structure of a main reed 6, the main reed 6 has three fixing points, a fixing hole 601 is respectively arranged at the left and right sides of the main reed, a center hole 605 is arranged in the middle, wherein the center hole 605 is used for connecting the main reed 6 with a bearing body 1, and the fixing holes 601 are used for connecting two ends of the main reed 6 with mounting tables 13 shown in fig. 1 (the mounting structure of the other end of the main reed 6 on a shell 4 is omitted in the figure).

When there is a three-point connection, the deformation of the main reed 6 is similar to that of a membrane switch, and when the pressure-bearing body 1 is pressed down, the middle part of the main reed 6 is depressed.

The main reed 6 may also adopt an overhanging structure, and the main reed 6 is equivalent to the half structure shown in fig. 6 and the seat groove 604 shown in the figure or the similar part for receiving the pressure-bearing body 1, and is similar to a shifting fork as a whole, and still can meet the requirement.

The main reed 6 corresponds to the composite structure of the movable contact and the reset structure, and the main reed 6 has very compact structure relative to two parts, so that the structure of the whole socket or the power strip can be simplified.

As described above, the movable contact may be mounted only on the pressure-bearing body 1, and there is no connection with the housing 4, and the pressure-bearing body 1 needs to be guided. The portion of the movable contact piece connected to the pressure-receiving body 1 is a first mounting portion, and the portion of the movable contact piece directly or indirectly connected to the housing 4 is a second mounting portion.

The seat 604 having the center hole 605 of the main reed 6 is the first mounting portion, and the fixing plate 602 having the fixing hole 601 is the second mounting portion.

As is apparent from the above description, in the embodiment shown in fig. 6, the main reed 6 is divided into two parts, one of which is a part for fixedly connecting with the pressure-bearing body 1, and the side of the part away from the pressure-bearing body 1 is configured as a movable contact piece, as shown in fig. 6, as a bottom wall of the seat groove 604.

The other part of the main reed 6 is the left and right end parts of the main reed 6 as shown in fig. 6, that is, the aforementioned fixing plate 602 having the fixing hole 601 for mounting the main reed 6 on the housing 4.

Regarding the assembly of the main reed 6, in some embodiments, the so-called half structure of the main reed 6 is matched with the intermediate portion, such as the seat groove 604 shown in fig. 6, at this time, one end of the main reed 6, that is, the end where the seat groove 604 is not located, is fixed by a single end, similar to the aforementioned fork, and the structure is relatively simple.

In some embodiments, as shown in fig. 6, the assembly structure is relatively reliable and is not prone to failure, and the elastic portion is curved, similar to a current bow, and the seat groove 604 is similar to a arrow.

In addition, as shown in fig. 6, the height of the bow shape defined by the spring body 603 is preferably greater than the above-mentioned moving gap, and when the spring body 603 is over-stroked, since the two fixing holes 601 are fixed, the spring body 603 generates a buckling bow, and cannot be reset. Based on the context, since the main reed 6 is required to be automatically reset, it indicates that the reed body 603 is over-stroked. If there is an additional reset feature, then the reed body 603 can be over-stroked, for example, if there is a secondary reed 2 as shown in fig. 5, then the reed body 603 can be over-stroked.

In the structure shown in fig. 6, a main reed 6 structure adapted to the second structure is provided, the mounting part for mounting with the bearing body 1 is a seat groove 604 with a central hole 605, the notch of the seat groove 604 faces the bearing body 1, and the structure provides the seat groove 604 to increase the restraint on the bearing body 1, so that the assembly structure between the main reed 6 and the seat groove is more reliable. On the other hand, the main reed 6 with the seat groove 604 is similar to the inverted arch structure, and the length of the main reed 6 in the plug insertion direction can be reduced, and the structure is relatively compact.

Accordingly, the pressure-bearing body 1 includes the mounting seat 102 embedded in the seat groove 604, and since the seat groove 604 is a rectangular groove, and accordingly, the mounting seat 102 is a rectangular seat, after the two seats are matched, only the fastening screw 18 as shown in fig. 2 is needed to be provided, so that all degrees of freedom of the assembly structure can be restrained, and the assembly reliability is relatively high.

To accommodate the assembly of the fastening screw 18 described above, the mounting block 102 has a blind hole 103 located in the central bore 605, the purpose of which is to avoid the presence of the fastening screw 18 (typically of an electrically conductive material, such as an iron nail) affecting the compact design of the overall structure.

The fastening screw 18 is fixedly connected to the blind hole 103 from the bottom plate side through the central hole 605, thereby fixedly connecting the mounting seat 102 to the seat groove 604.

As described above, in order to provide a more reliable return, a sub-reed 2 is further provided on the side of the main reed 6 away from the pressure-bearing body 1, and the presence of the sub-reed 2 also serves to increase the reliability of the electrical connection, mainly by increasing the area between the components to be electrically connected.

As for the structure of the sub reed 2 shown in fig. 5, it is also possible to use a structure of the main reed 6 having only one connection point, that is, the mounting surface 203 having the mounting via 204 shown in fig. 5, in which a separate reset means is required to be provided for the main reed 6.

The sub-reed 2 shown in fig. 5 includes:

the mounting surface 203 is used for fitting the auxiliary reed 2 and the main reed 6, in the structure shown in fig. 1 and 2, the auxiliary reed 2 and the main reed 6 are fixedly connected by adopting a fastening screw 18, and in some embodiments, the connection can be realized by adopting a chemical bonding mode, that is, the mounting surface 203 is fitted with the lower surface of the seat groove 604 of the main reed 6 in fig. 6, and the fitting is realized by adopting glue.

In fig. 5, the portion where the mounting surface 203 is provided is the seat portion of the sub-reed 2, and the portion overhanging from the mounting surface provides the reed body, which is easily resilient, and is restored and the joint surface area is increased based on the resilient.

The center of the curved portion 202 shown in fig. 5 is located on the side of the bottom plate, when the auxiliary reed 2 runs downward, it is pressed by the static contact 5 to generate deformation, and the restoration of the deformation can provide a restoring force for restoring the main reed 6, and the deformation can also increase the contact surface area between the curved portion 202 and the static contact 5.

If the curved portion 202 is in a complete arc shape, the friction of the end portion of the curved portion against the static contact 5 is relatively severe, and in order to improve the contact condition between the curved portion 202 and the static contact 5, a buckling portion 201 is arranged at the tail end of the Qu Bu, and the existence of the buckling portion 201 makes the contact between the auxiliary reed 2 and the static contact 5 relatively blunt, so that the static contact 5 is not scratched.

In the structure shown in fig. 5, the sub-reed 2 has a bilateral symmetry structure in which the mounting surface 203 is provided in the middle, and one bent portion 202 is provided on each of the left and right sides of the mounting surface 203.

The centers of the two curved parts 202 are the same, so that the auxiliary reed 2 is integrally like a reverse curved bow structure, and the integral structure is compact and the elasticity is relatively strong.

Referring to fig. 1 and 2, the main reed 6, the auxiliary reed 2 and the pressure-bearing body 1 are fixedly connected with each other by the same fastening member, such as the fastening screw 18 shown in the drawings, and the assembly structure is relatively simple.

In comparison with the conventional safety socket, the housing 4 is provided with a partition 7, wherein the partition 7 is mainly used for installing three electrodes, and the cavity formed by the partition 7 is used for installing the device for realizing the control structure of the live wire electrode 9, such as the main reed 6.

In fig. 1, the partition 7 is provided with partition vias for the passage of connecting wires 12.

Accordingly, the separator also needs to be provided with separator vias for the ground electrode posts to pass through.

Claims

1. The safety socket is used for a three-pin plug with a grounding electrode column longer than the other two electrode columns and is characterized by comprising a grounding electrode, a zero line electrode and a fire wire electrode, wherein a plug electrode through hole is formed in the grounding electrode pair at the position of the grounding electrode column; the safety socket further includes:

the reset structure or device is used for resetting the movable contact;

the movable contact piece and the reset structure are integrated into a main reed, and the main reed comprises:

the fixing plate is a structural part of the main reed arranged on the safety socket shell;

the static contact piece is opposite to the movable contact piece, and a movable closing gap is reserved between the static contact piece and the movable contact piece, wherein the movable closing gap is 3-5 mm; the working stroke of the pressure-bearing body is 1mm larger than the moving-closing gap.

2. The safety socket of claim 1 wherein the main reed has:

a first structure: the reed is fixed at one end and is suspended at the other end, wherein the fixing plate is arranged at one end for fixing, and the mounting part is arranged at one end for suspending; or (b)

3. The safety socket of claim 2 wherein in the second configuration, the mounting portion is a socket with a central bore, the socket slot being oriented toward the pressure body;

4. A safety socket according to any one of claims 1 to 3, wherein a secondary reed is further provided on a side of the primary reed away from the pressure-bearing body, the secondary reed comprising:

and a curved portion overhanging from the mounting surface.

5. The safety socket of claim 4 wherein the curved portion is provided with a reverse curved portion at the end thereof.

6. The safety socket according to claim 5, wherein the sub-reed has a bilateral symmetry structure, the middle of which is provided with the mounting surface, and the left and right sides of the mounting surface are respectively provided with a curved part;

the centers of the two curved parts are the same.

7. The safety socket of claim 4 wherein the primary reed, the secondary reed and the pressure body are fixedly connected to each other by the same fastener.

8. A safety socket according to any one of claims 1 to 3, wherein a partition is provided in the housing of the safety socket, the ground electrode is mounted on one side of the partition, and the main reed is located on the other side of the partition;

9. The safety socket of claim 8 wherein a cavity is formed between the partition and the bottom shell of the housing, the main reed being located in the cavity;