CN113422238A - Plug picking-up plug and power connection device - Google Patents

Abstract

The invention discloses a power pick-up plug and a power connection device, and relates to the technical field of power connection. The power pick-up plug comprises a shell, a movable piece, a live wire and three conducting mechanisms. The moving part is movably installed on the shell and is connected with the live wire, the live wire is used for being connected with an electric appliance, three conductive mechanisms are installed in the shell, the three conductive mechanisms are used for being connected with three live wire buses of the three-phase alternating current power supply in a one-to-one mode, the moving part is selectively connected with one conductive mechanism, and therefore the electric appliance can be conducted with any live wire bus in the three-phase alternating current power supply. Compared with the prior art, the power pick-up plug provided by the invention adopts the three conductive mechanisms arranged in the shell and the movable part movably connected with the shell, so that the circuit phase line in the three-phase alternating current power supply connected with an electric appliance can be adjusted, the three-phase circuit load in the three-phase alternating current power supply is kept balanced, and the safety is high.

Description

Plug picking-up plug and power connection device

Technical Field

The invention relates to the technical field of power connection, in particular to a power pick-up plug and a power connection device.

Background

Currently, rail sockets are favored by many users due to their portability and ease of installation. The track socket comprises a power pick-up plug and a power supply track, and the power pick-up plug is inserted into the power supply track to take power from the power supply track in the use process of the track socket, so that the track socket replaces a common plug to realize the electric connection of an electric appliance and a power supply. However, the power supply of the power supply rail is divided into a single-phase (L/N/E three-wire) and a three-phase (L1/L2/L3/N/E five-wire), when the single-phase power pick-up plug takes power from the three-phase power supply rail, the load of one phase of circuit may be too large, and the loads of other circuits may be small, so that the loads of the three-phase circuits in the three-phase power supply rail are unbalanced, which is likely to cause a safety hazard.

In view of the above, it is important to design and manufacture a high-safety power pick-up plug and a power receiving device, especially in the production of rail sockets.

Disclosure of Invention

The invention aims to provide a power pick-up plug which can adjust a circuit phase line in a three-phase alternating current power supply connected with an electric appliance so as to keep the load of the three-phase circuit in the three-phase alternating current power supply balanced and has high safety.

Another object of the present invention is to provide a power connection device, which can adjust the phase lines of a three-phase ac power supply connected to an electric appliance to balance the load of the three-phase circuit in the three-phase ac power supply, and has high safety.

The invention is realized by adopting the following technical scheme.

The utility model provides a pick-up plug, includes shell, moving part, live wire and three electrically conductive mechanism, and the moving part movably installs on the shell, and is connected with the live wire, and the live wire is used for being connected with electrical apparatus, and three electrically conductive mechanism all installs in the shell, and three electrically conductive mechanism is used for three live wire bus connections with three-phase AC power supply one-to-one, and the moving part is connected with an electrically conductive mechanism selectively to make electrical apparatus can switch on with any live wire bus in the three-phase AC power supply.

Optionally, the housing is provided with a sliding groove, and the movable member is slidably disposed in the sliding groove and selectively contacts with one of the conductive mechanisms. The spout can carry out spacing and direction to the moving part, and the moving part can slide for the spout to the position of adjustment moving part makes the moving part can contact with different conductive mechanism.

Optionally, the moving part includes slider, first terminal and switches on the piece, and the slider slides and sets up in the spout, and with switch on piece fixed connection, switch on the piece and be connected with the live wire through first terminal, the slider can drive and switch on the piece and slide for the shell to make and switch on the piece and selectively with a conductive mechanism contact. Thereby realizing the conduction of the live wire and a conductive mechanism.

Optionally, the conducting sheet includes a connecting portion, a fixing portion and a contact portion, the connecting portion is fixedly connected with the contact portion through the fixing portion, the connecting portion is fixedly connected with the first terminal, the fixing portion is fixedly connected with the slider, and the contact portion is used for contacting with the conductive mechanism. The slider can drive connecting portion and contact site motion through the fixed part in step to make first terminal switch on with different conductive mechanism, thereby make electrical apparatus and different conductive mechanism switch on.

Optionally, the housing is provided with three grooves at intervals, the position of each groove corresponds to the position of one conductive mechanism, the movable member is provided with a boss, and the boss can extend into the corresponding groove when the movable member contacts with one conductive mechanism and is matched with the groove. To slightly define the relative position of the movable member and the housing, providing a shift feel to the user.

Optionally, the conductive mechanism includes a first plug bush, a connecting conductor, a second plug bush, a spring, and a power pick-up contact, the first plug bush is connected with the second plug bush through the connecting conductor, the first plug bush is used for contacting with the moving part, the power pick-up contact partially extends into the second plug bush and is connected with the second plug bush through the spring, and the power pick-up contact is used for being connected with the live wire bus. So that the live wire is conducted with the live wire bus, and the electric appliance is electrified.

Optionally, the first plug bush comprises a first elastic contact piece, a second elastic contact piece and a connecting piece, the first elastic contact piece is connected with the second elastic contact piece through the connecting piece, the connecting piece is connected with the connecting conductor, the first elastic contact piece and the second elastic contact piece are arranged at intervals in parallel, and the moving piece penetrates through the space between the first elastic contact piece and the second elastic contact piece and can be in contact with the first elastic contact piece and the second elastic contact piece. So that the movable member is conducted with the first plug bush.

Optionally, the housing includes a casing and an insulating sleeve, the insulating sleeve is fixedly connected in the casing and partially extends out of the casing, and the conductive mechanism is installed in the insulating sleeve. The insulating cover can prevent the condition that electrically conductive mechanism takes place the electric leakage.

Optionally, the power pick-up plug further comprises a ground wire, a zero line and two power-on mechanisms, wherein the two power-on mechanisms are installed in the shell and are respectively connected with the ground wire and the zero line, the ground wire and the zero line are both used for being connected with an electric appliance, one power-on mechanism is used for being connected with a ground wire bus of the three-phase alternating-current power supply, and the other power-on mechanism is used for being connected with a zero line bus of the three-phase alternating-current power supply. To enable the appliance to be energized.

The utility model provides a power connection device, includes foretell power pick-up plug, and this power pick-up plug includes shell, moving part, live wire and three electrically conductive mechanism, and the moving part movably installs on the shell, and is connected with the live wire, and the live wire is used for being connected with electrical apparatus, and three electrically conductive mechanism all installs in the shell, and three electrically conductive mechanism are used for three live wire generating lines of one-to-one ground and three-phase alternating current power supply to be connected, and the moving part is connected with an electrically conductive mechanism selectively to make electrical apparatus can switch on with any live wire generating line among the three-phase alternating current power supply.

The power pick-up plug and the power connection device provided by the invention have the following beneficial effects:

according to the power pick-up plug provided by the invention, the moving part is movably arranged on the shell and is connected with the live wire, the live wire is used for being connected with an electric appliance, the three conducting mechanisms are all arranged in the shell and are used for being connected with three live wire buses of a three-phase alternating current power supply in a one-to-one correspondence manner, and the moving part is selectively connected with one conducting mechanism so that the electric appliance can be conducted with any live wire bus in the three-phase alternating current power supply. Compared with the prior art, the power pick-up plug provided by the invention adopts the three conductive mechanisms arranged in the shell and the movable part movably connected with the shell, so that the circuit phase line in the three-phase alternating current power supply connected with an electric appliance can be adjusted, the three-phase circuit load in the three-phase alternating current power supply is kept balanced, and the safety is high.

The power connection device provided by the invention comprises a power pick-up plug, and can adjust the circuit phase line in the three-phase alternating current power supply connected with an electric appliance so as to keep the load of the three-phase circuit in the three-phase alternating current power supply balanced and have high safety.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a power connection device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first view angle of a power pick-up plug according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second view angle of the power pick-up plug according to the embodiment of the present invention;

fig. 4 is a circuit diagram of a power pick-up plug provided by the embodiment of the invention and connected with a three-phase alternating-current power supply;

fig. 5 is a schematic structural diagram of a third view angle of a power pick-up plug according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a movable member in the power pick-up plug according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a view angle of a connection between a movable member and a conductive mechanism in a power pick-up plug according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another view angle of the connection between the movable member and the conductive mechanism in the plug pick-up according to the embodiment of the present invention.

Icon: 10-a power connection device; 100-a power pick-up plug; 110-a housing; 111-a chute; 112-a groove; 113-a housing; 114-an insulating sleeve; 120-moving parts; 121-a slider; 122-a first terminal; 123-conducting sheet; 124-a connecting part; 125-a stationary part; 126-contact; 127-boss; 130-a live line; 140-ground; 150-zero line; 160-a power-on mechanism; 161-a second terminal; 170-a conductive mechanism; 171-a first sleeve; 172-connecting conductors; 173-a second sleeve; 174-a spring; 175-a pick-up contact; 176-a first resilient contact; 177-a second resilient contact; 178-connecting sheets; 200-three phase power supply rail.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the invention provides an electrical connection device 10 for connecting an electrical appliance to a power supply to power the electrical appliance. The three-phase alternating current power supply can adjust the circuit phase line in the three-phase alternating current power supply connected with an electric appliance so as to keep the load of the three-phase circuit in the three-phase alternating current power supply balanced and has high safety.

In this embodiment, the power receiving device 10 is a rail-type plug device (rail socket), and the power receiving device 10 includes a power pick-up plug 100 and a three-phase power rail 200. The power pick-up plug 100 is connected with an electric appliance, a three-phase alternating current power supply is arranged in the three-phase power supply rail 200, the power pick-up plug 100 is inserted into the three-phase power supply rail 200 and matched with the three-phase power supply rail 200 to realize the electric connection of the electric appliance and the three-phase alternating current power supply, so that the electric appliance is powered. However, the power receiving device 10 may be a conventional plug-in device including the power pick-up plug 100 and a conventional socket, in which a three-phase ac power supply is provided, and the plug-in form of the power receiving device 10 is not particularly limited.

Specifically, during the assembly of the power receiving device 10, the power pick-up plug 100 is first partially inserted into the three-phase power rail 200; subsequently pushing the pick-up plug 100 to slide relative to the three-phase power rail 200; when the power pick-up plug 100 slides to the preset position, the power pick-up plug 100 is rotated clockwise by 90 degrees to fix the relative position of the power pick-up plug 100 and the three-phase power supply rail 200 and ensure that the power pick-up plug 100 is electrically connected with the three-phase power supply rail 200.

Referring to fig. 2, 3 and 4, the power pick-up plug 100 includes a housing 110, a movable member 120, a live wire 130, a ground wire 140, a neutral wire 150, two energizing mechanisms 160 and three conducting mechanisms 170. The moveable member 120 is movably mounted to the housing 110 and is connected to a power cord 130, the power cord 130 is for connection to an electrical device, and the moveable member 120 is capable of moving relative to the housing 110. The three conductive mechanisms 170 are all installed in the housing 110, and the three conductive mechanisms 170 are used for being connected with three live buses of a three-phase alternating-current power supply in a one-to-one correspondence manner. The moveable member 120 is selectively connectable to an electrically conductive mechanism 170 to enable electrical continuity between the appliance and any live bus of the three-phase ac power source. Therefore, when the power pick-up plug 100 is matched with the three-phase power supply rail 200, the live wire bus connected with the electric appliance can be switched at will to adjust the circuit phase line in the three-phase alternating current power supply connected with the electric appliance, so that the three-phase circuit load in the three-phase alternating current power supply is kept balanced, and the safety is high.

It should be noted that both the energizing mechanisms 160 are installed in the housing 110, and are connected to the ground wire 140 and the neutral wire 150, respectively. The ground wire 140 and the neutral wire 150 are both adapted for connection to an appliance, one energizing mechanism 160 is adapted for connection to a ground wire bus of a three-phase ac power source, and the other energizing mechanism 160 is adapted for connection to a neutral bus of the three-phase ac power source. When the power pick-up plug 100 is mated with the three-phase power track 200, the ground wire 140 is connected to the ground wire bus via one of the energizing mechanisms 160, and the neutral wire 150 is connected to the neutral wire bus via the other energizing mechanism 160 to energize the appliance.

It is noted that the power pick-up plug 100 is a single-phase power pick-up plug 100, the power pick-up plug 100 includes a live wire 130, a ground wire 140 and a neutral wire 150, and the live wire 130, the ground wire 140 and the neutral wire 150 are all connected to an electric appliance. The three-phase alternating current power supply comprises five buses, namely a zero line bus, a ground line bus and three live line buses. Specifically, the ground wire 140 is connected to a ground wire bus, the neutral wire 150 is connected to a neutral wire bus, and the live wire 130 is selectively connected to a live wire bus to energize the electrical appliance.

For ease of understanding, live 130 is represented as L, ground 140 is represented as E, neutral 150 is represented as N, the three live buses are represented as L1, L2 and L3, respectively, the ground bus is represented as E and the neutral bus is represented as N.

In this embodiment, the number of the electrical appliances and the number of the power picking plugs 100 are three, the three power picking plugs 100 are all matched with the three-phase power supply rail 200, the first electrical appliance is connected with a first live wire bus in the three-phase ac power supply through a live wire 130 of the first power picking plug 100, the second electrical appliance is connected with a second live wire bus in the three-phase ac power supply through a live wire 130 of the second power picking plug 100, and the third electrical appliance is connected with a third live wire bus in the three-phase ac power supply through a live wire 130 of the third power picking plug 100, so that the three live wire buses have loads to keep the three-phase circuit loads in the three-phase ac power supply balanced, and the safety is improved. However, the number of the electric appliances and the power pick-up plugs 100 is not limited to this, in other embodiments, the number of the electric appliances and the power pick-up plugs 100 is four or five, and four or five power pick-up plugs 100 are all matched with the three-phase power supply rail 200, and at this time, matching is required according to the load of different electric appliances, so as to balance the three-phase circuit load in the three-phase ac power supply, and the number of the electric appliances and the power pick-up plugs 100 is not particularly limited.

It should be noted that the housing 110 has a sliding slot 111, and the movable element 120 is slidably disposed in the sliding slot 111 and selectively contacts with one of the conductive mechanisms 170. The sliding groove 111 can limit and guide the movable element 120, and the movable element 120 can slide relative to the sliding groove 111 to adjust the position of the movable element 120, so that the movable element 120 can contact with different conductive mechanisms 170. Specifically, when the moveable member 120 slides into contact with the first conductive mechanism 170, the live wire 130 is connected to the first live bus via the moveable member 120 and the first conductive mechanism 170; when the movable element 120 slides to contact with the second conductive mechanism 170, the live wire 130 is connected to the second live wire bus through the movable element 120 and the second conductive mechanism 170; when the hinge 120 slides into contact with the third conductive means 170, the live wire 130 is connected to the third live bus via the hinge 120 and the third conductive means 170.

Referring to fig. 5 and 6, the movable element 120 includes a slider 121, a first terminal 122, and a conducting strip 123. The slider 121 slides and is arranged in the sliding groove 111, and is fixedly connected with the conducting sheet 123, so that a user can stir the slider 121 to slide the slider 121 in the sliding groove 111, and the conducting sheet 123 is driven to displace. The conducting sheet 123 is fixedly connected with the live wire 130 through the first terminal 122, and the slider 121 can drive the conducting sheet 123 to slide relative to the housing 110, so that the conducting sheet 123 selectively contacts with one conducting mechanism 170, and the live wire 130 is conducted with one conducting mechanism 170.

In this embodiment, the conducting sheet 123 is U-shaped, and the conducting sheet 123 includes a connecting portion 124, a fixing portion 125 and a contact portion 126. The connecting portion 124 is fixedly connected to the contact portion 126 through the fixing portion 125, and specifically, the connecting portion 124, the fixing portion 125 and the contact portion 126 are integrally formed to improve connection strength. The connecting portion 124 is fixedly connected to the first terminal 122, the fixing portion 125 is fixedly connected to the slider 121, and the contact portion 126 is used for contacting the conductive mechanism 170. The sliding block 121 can synchronously drive the connecting portion 124 and the contact portion 126 to move through the fixing portion 125, so that the first terminal 122 is conducted with different conductive mechanisms 170, and thus the electrical appliance is conducted with different conductive mechanisms 170.

In this embodiment, the sliding block 121 is made of an insulating material, and the first terminal 122 and the conducting piece 123 are both made of a metal material, so that the live wire 130 can be conducted with the conducting mechanism 170 through the first terminal 122 and the conducting piece 123, and the sliding block 121 does not leak electricity to the outside, thereby ensuring the safety of the user.

Further, the housing 110 is provided with three grooves 112 at intervals, and the position of each groove 112 corresponds to the position of one conductive mechanism 170. The slider 121 of the movable element 120 is provided with a projection 127, and the projection 127 can extend into the corresponding groove 112 when the movable element 120 contacts one of the conductive mechanisms 170 and cooperate with the groove 112 to slightly limit the relative position of the movable element 120 and the housing 110, thereby providing a shift feeling to a user. Specifically, when the user pushes the movable element 120 to a position where the boss 127 is engaged with the groove 112, the boss 127 is embedded in the groove 112 to form a certain resistance, so that the user knows that the movable element 120 is in a state of contacting with one of the conductive mechanisms 170; to adjust the phase line of the circuit, the user is required to increase the force applied to movable member 120 to disengage boss 127 from groove 112 and allow movable member 120 to continue sliding within slot 111.

Referring to fig. 7 and 8 in combination, the conductive mechanism 170 includes a first sleeve 171, a connecting conductor 172, a second sleeve 173, a spring 174, and a pick-up contact 175. First sleeve 171 is connected to second sleeve 173 via connecting conductor 172, and first sleeve 171 is used to contact conductive piece 123 of movable element 120. The pick-up contact 175 extends partially into the second sleeve 173 and is connected to the second sleeve 173 by a spring 174, the pick-up contact 175 being adapted to connect to the live busbar to allow the live wire 130 to be connected to the live busbar, thereby energizing the appliance.

Specifically, the live wire bus is disposed in the three-phase power rail 200, and when the power pick-up plug 100 is engaged with the three-phase power rail 200, the spring 174 is always in a compressed state to apply an elastic force to the power pick-up contact 175, so that the power pick-up contact 175 has a tendency to move in a direction away from the second sleeve 173, so that the power pick-up contact 175 is abutted against the live wire bus in the three-phase power rail 200, and the power pick-up contact 175 is ensured to be effectively and reliably contacted with the live wire bus.

The first receptacle 171 includes a first resilient contact 176, a second resilient contact 177, and a connecting piece 178. The first elastic contact piece 176 is connected to the second elastic contact piece 177 through a connecting piece 178, and in this embodiment, the first elastic contact piece 176, the connecting piece 178 and the second elastic contact piece 177 are integrally formed to improve the connection strength. The connecting piece 178 is connected to the connecting conductor 172, the first elastic contact piece 176 and the second elastic contact piece 177 are arranged in parallel at intervals, and the moving member 120 penetrates between the first elastic contact piece 176 and the second elastic contact piece 177 and can be in contact with the first elastic contact piece 176 and the second elastic contact piece 177, so that the moving member 120 is conducted with the first plug bush 171.

Specifically, when the movable element 120 slides to contact with the first socket 171, the contact portion 126 of the conducting piece 123 extends into between the first elastic contact piece 176 and the second elastic contact piece 177, and at this time, the first elastic contact piece 176 and the second elastic contact piece 177 clamp the contact portion 126 under the action of their own elastic forces, so as to ensure that the first socket 171 and the conducting piece 123 are in effective and reliable contact.

It should be noted that the specific structure of the energizing mechanism 160 is the same as the specific structure of the conductive mechanism 170, except that the first plug sleeve 171 in the conductive mechanism 170 is replaced by the second terminal 161, and the second terminal 161 is fixedly connected to the ground wire 140 or the zero line 150, which is not described herein again.

With continued reference to fig. 5, the housing 110 includes a shell 113 and an insulating sleeve 114. The insulating sleeve 114 is fixedly connected in the housing 113 and partially extends out of the housing 113, and the insulating sleeve 114 can be inserted into the three-phase power rail 200 and is matched with the three-phase power rail 200. The conductive mechanism 170 is installed in the insulating sleeve 114, and the insulating sleeve 114 can prevent the conductive mechanism 170 from leaking electricity. Specifically, the groove 112 opens on the insulating sleeve 114, and the movable member 120 is slidable with respect to the housing 113 and the insulating sleeve 114.

In the power pickup plug 100 according to the embodiment of the present invention, the movable element 120 is movably mounted on the housing 110 and connected to the live wire 130, the live wire 130 is used for connecting to an electrical appliance, the three conductive mechanisms 170 are all mounted in the housing 110, the three conductive mechanisms 170 are used for connecting to three live wire buses of a three-phase ac power supply in a one-to-one correspondence manner, and the movable element 120 is selectively connected to one conductive mechanism 170, so that the electrical appliance can be conducted to any live wire bus of the three-phase ac power supply. Compared with the prior art, the power pick-up plug 100 provided by the invention adopts the three conductive mechanisms 170 arranged in the shell 110 and the movable part 120 movably connected with the shell 110, so that the circuit phase line in the three-phase alternating current power supply connected with an electric appliance can be adjusted, the three-phase circuit load in the three-phase alternating current power supply is kept balanced, and the safety is high. Therefore, the power connection device 10 can realize stable power connection, and is safe and reliable.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A power pick-up plug, comprising a housing (110), a movable member (120), a live wire (130) and three conductive mechanisms (170), wherein the movable member (120) is movably mounted on the housing (110) and connected with the live wire (130), the live wire (130) is used for connecting with an electric appliance, the three conductive mechanisms (170) are all mounted in the housing (110), the three conductive mechanisms (170) are used for connecting with three live wire buses of a three-phase alternating current power supply in a one-to-one correspondence manner, and the movable member (120) is selectively connected with one conductive mechanism (170) so as to enable the electric appliance to be conducted with any live wire bus of the three-phase alternating current power supply.

2. The power pick-up plug according to claim 1, wherein the housing (110) defines a chute (111), and the movable member (120) is slidably disposed in the chute (111) and selectively contacts one of the conductive mechanisms (170).

3. The power pick-up plug according to claim 2, wherein the movable member (120) includes a slider (121), a first terminal (122) and a conducting piece (123), the slider (121) is slidably disposed in the sliding slot (111) and fixedly connected to the conducting piece (123), the conducting piece (123) is connected to the live wire (130) through the first terminal (122), and the slider (121) can drive the conducting piece (123) to slide relative to the housing (110) so that the conducting piece (123) selectively contacts with one of the conducting mechanisms (170).

4. The pick-up plug according to claim 3, wherein the conductive sheet (123) comprises a connecting portion (124), a fixing portion (125) and a contact portion (126), the connecting portion (124) is fixedly connected with the contact portion (126) through the fixing portion (125), the connecting portion (124) is fixedly connected with the first terminal (122), the fixing portion (125) is fixedly connected with the slider (121), and the contact portion (126) is used for contacting with the conductive mechanism (170).

5. The pick-up plug according to claim 2, wherein the housing (110) is provided with three spaced recesses (112), each recess (112) corresponding to one of the conductive means (170), the movable member (120) is provided with a projection (127), and the projection (127) is capable of protruding into the corresponding recess (112) and engaging with the recess (112) when the movable member (120) contacts one of the conductive means (170).

6. The pick-up plug according to claim 1, wherein the conductive mechanism (170) comprises a first sleeve (171), a connecting conductor (172), a second sleeve (173), a spring (174), and a pick-up contact (175), the first sleeve (171) being connected to the second sleeve (173) by the connecting conductor (172), the first sleeve (171) being adapted to contact the movable member (120), the pick-up contact (175) partially extending into the second sleeve (173) and being connected to the second sleeve (173) by the spring (174), the pick-up contact (175) being adapted to be connected to the live bus.

7. The power pick-up plug according to claim 6, wherein the first socket (171) comprises a first elastic contact piece (176), a second elastic contact piece (177) and a connecting piece (178), the first elastic contact piece (176) is connected with the second elastic contact piece (177) through the connecting piece (178), the connecting piece (178) is connected with the connecting conductor (172), the first elastic contact piece (176) and the second elastic contact piece (177) are arranged in parallel and at an interval, and the movable piece (120) penetrates between the first elastic contact piece (176) and the second elastic contact piece (177) and can be in contact with the first elastic contact piece (176) and the second elastic contact piece (177).

8. The power pick-up plug according to claim 1, wherein the housing (110) comprises a housing (113) and an insulating sleeve (114), the insulating sleeve (114) being fixedly connected within the housing (113) and partially protruding out of the housing (113), the conductive mechanism (170) being mounted within the insulating sleeve (114).

9. The power pick-up plug according to claim 1, further comprising a ground wire (140), a neutral wire (150) and two power-on mechanisms (160), both power-on mechanisms (160) being mounted within the housing (110) and being connected to the ground wire (140) and the neutral wire (150), respectively, the ground wire (140) and the neutral wire (150) being for connection to the appliance, one power-on mechanism (160) being for connection to a ground bus of the three phase alternating current power supply and the other power-on mechanism (160) being for connection to a neutral bus of the three phase alternating current power supply.

10. An electric installation comprising a pick-up plug according to any one of claims 1 to 9.

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