CN220979891U

CN220979891U - Building block fan

Info

Publication number: CN220979891U
Application number: CN202322572093.2U
Authority: CN
Inventors: 梁臻智
Original assignee: Guangdong Titanium Tantalum Technology Co ltd
Current assignee: Guangdong Titanium Tantalum Technology Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-05-17
Anticipated expiration: 2033-09-21

Abstract

The utility model provides a building block fan, includes the fan main part, the inside FPC that is equipped with of fan main part switches on the circuit board, FPC switches on circuit board and fan motor electric connection, fan main part both sides are equipped with coupling assembling, coupling assembling includes electric connection piece, fixed connection piece, electric connection piece and FPC switch on circuit board electric connection, coupling assembling and wire connecting piece shape match and connect, wire connecting piece has power interface terminal through the wire connection, through above-mentioned technical scheme, realizes fixed connection and electric connection through electric connection piece, fixed connection when a plurality of building block fans transversely evenly arrange, and just only need a power wire just can supply power for so building block fan, can be at quick convenient increase or reduce fan quantity under the circumstances that does not increase the wire, has fine expansibility.

Description

Building block fan

Technical Field

The utility model relates to the field of fans, in particular to a building block fan.

Background

The fan is generally used for heat dissipation of equipment such as a radiator, a machine case and the like, and the heat dissipation efficiency is improved by driving the fan blades to rotate through a power supply to accelerate the air flow speed.

In the prior art, the radiator or the cooling fans in the case are usually independently powered and independently installed, when the radiator or the cooling fans are used, the number of the fans cannot be increased or reduced at will, when the number of the fans is changed, the wires are required to be additionally increased and respectively connected with the power interfaces, so that the connection and arrangement of the wires are very inconvenient, the number of the fans can be limited by the number of the power interfaces of the case, and the expansibility is not strong.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provides a building block fan.

The aim of the utility model is realized by the following technical scheme:

The utility model provides a building block fan, includes the fan main part, the inside FPC switches on the circuit board that is equipped with of fan main part, FPC switches on the circuit board and communicates each part that needs the power of fan inside and supplies power, FPC switches on circuit board and fan motor electric connection, FPC switches on the circuit board and utilizes external power source to supply power for the fan motor, fan main part both sides are equipped with coupling assembling, and coupling assembling is located opposite side respectively, and transverse arrangement can interconnect fixedly and circular telegram when having a plurality of building block fans, coupling assembling includes electric connection piece, fixed connection piece, electric connection piece mutually matches and transmits electric power when having a plurality of building block fans, electric connection piece and FPC switch on circuit board electric connection, and electric connection piece establishes and forms the effect of conducting electric power on FPC switches on the circuit board, coupling assembling and wire connection piece shape and fixed connection piece match and fixed connection are equipped with the electrically conductive part who matches with electric connection piece on the wire connection piece, wire connection piece is connected with power interface terminal through the wire from power interface terminal, and the wire connection piece is with electric power transmission for wire connection piece to last electric connection piece of wire transmission for the fan, electric connection piece and fan drive electric connection piece with fan and drive electric connection piece and provide electric connection piece along electric motor and turn on the motor and rotate electric connection board and realize the effect.

In one embodiment, the electrical connector includes a male connection end, a female connection end, the male connection end is a plug with a fixed pin, a contact pin or other shape inserted into a mating connector or socket, so as to realize the function of conducting power, the female connection end is a connector with a hole, a slot or a socket capable of accommodating the male connection end, when the male connection end is connected with the female connection end, the male connection end allows electric signals, power or data to be transmitted between the two devices, the fixed connector includes a fixing groove and a fixing protrusion, the shape of the fixing groove is matched with the fixing protrusion and buckled with each other, the fixing groove and the fixing protrusion can fix the arranged building block fans when connected together, the female connection end includes a female connection end and a fixing protrusion, the female connection end can accommodate the male connection end to realize the power transmission, and the fixing protrusion and the fixing groove are adapted to realize the effect of fixing the wires on the side walls of the fans.

In one embodiment, the male connection end and the female connection end are respectively disposed on opposite sides of the fan main body, the male connection end and the female connection end are mutually adapted and electrically connected, the male connection end and the female connection end can be mutually electrically connected in a transversely arranged manner when a plurality of building block fans are arranged, the fixing grooves and the fixing protrusions are respectively disposed on opposite sides of the fan main body, the fixing grooves and the fixing protrusions are mutually adapted, the male connection end and the female connection end are mutually fixedly connected in a transversely arranged manner when a plurality of building block fans are arranged, and the fixing protrusions and the female connection end are disposed on the same side.

In one embodiment, the fan bodies can be fixedly connected and electrically connected when being transversely and uniformly arranged, and the male connection end and the female connection end are also connected together to realize power transmission when the fixing grooves of the fan bodies are connected with the fixing protrusions of the side fan bodies.

In one embodiment, the fixed groove is internally provided with a groove magnet, the groove magnet is made of a ferromagnetic material, the fixed protrusion is internally provided with a protrusion magnet, the protrusion magnet is made of a ferromagnetic material, the wire fixing protrusion is internally provided with a wire magnet, the wire magnet is made of a ferromagnetic material, the groove magnet and the protrusion magnet are attracted mutually, a plurality of building block fans are connected conveniently and rapidly through a magnetic attraction mode, and the groove magnet and the wire magnet are attracted mutually, so that a wire connected with an external power supply is connected to the building block fans conveniently and rapidly through the magnetic attraction mode.

In one embodiment, an interface terminal is arranged above the FPC conductive circuit board and is connected with parts such as a fan motor in a fan, which need electric power, so that electric power is provided for the parts, the interface terminal is electrically connected with the fan motor, the interface terminal transmits electric power of an external power supply to the fan motor, one end of the FPC conductive circuit board is provided with a connection male end, the other end of the FPC conductive circuit board is provided with a connection female end, the design of which is communicated with a plurality of building block fans, and the electric power transmission effect of a series circuit is realized when the building block fans are connected.

In one embodiment, a fan blade is arranged in the fan main body, the fan blade rotates to drive air to flow, a fan motor is arranged in the fan blade, the fan motor rotates to drive the fan blade to rotate, the fan motor comprises a motor shell, a motor and a motor bearing, the motor is arranged in the motor shell, the motor converts electric energy into mechanical energy, and the motor bearing is arranged in the motor.

In one embodiment, the fan main body comprises an upper shell, a light guide ring and a lower shell, the upper shell and the lower shell are combined from top to bottom to form a fan shell, the FPC conducting circuit board is located on the outer side wall of the light guide ring, two ends of the FPC conducting circuit board are leaked on two sides of the fan shell, the male end and the female end are connected to leak out of the fan shell to achieve connection of the multi-building-block fan, the light guide ring is electrically connected with the FPC conducting circuit board, and the FPC conducting circuit board transmits electric power of an external power source to the light guide ring to achieve the effect of light guide ring luminescence.

In one embodiment, an upper cover is arranged above the upper shell, pits for accommodating the magnets are arranged below the upper cover, two upper covers are arranged above the upper shell, four upper gaskets are arranged above the upper shell, a lower gasket is arranged below the lower shell, four lower gaskets are arranged below the lower shell, and the upper gasket and the lower gasket protect the fan shell from being damaged when being fixed by screws.

In one embodiment, the wire connecting piece comprises protruding left shell of wire, wire magnet, female end of wire, wire right shell, protruding left shell of wire, wire magnet, female end of wire, wire right shell form the wire connecting piece from left to right in proper order, protruding left shell of wire matches with fixed recess, and wire magnet attracts each other with the recess magnet in the fixed recess, realizes fixing the effect of fixed recess with the wire connecting piece, and female end of wire matches and electric connection with the connection male end on the building block fan, female end of wire and wire one end electric connection, the wire other end is connected with power interface terminal, realizes the effect of transmitting the electric power of external power source to the female end of wire through this structure.

The utility model has the beneficial effects that:

According to the technical scheme, the functions of quick connection and fixation of the building block fans are realized through the shapes of the fixed connecting pieces and the attractive force of the magnets in the fixed connecting pieces, the male connection ends and the female connection ends are also connected together when the building block fans are connected and fixed, the effect of electric power transmission inside the building block fans is realized, the number of the fans can be increased or reduced at will, no additional wires or additional power interfaces are needed when the number of the fans is changed, power can be supplied to all the building block fans only by one wire, and the building block fan has the advantages of extremely strong expansibility, rapidness and easiness in disassembly and space saving.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the splice of the present utility model.

Fig. 2 is an exploded view of the present utility model.

The reference numerals in the figures represent: fan blade 1, motor housing 2, motor 3, motor bearing 4, upper spacer 5, upper cover 6, upper case 7, diaphragm 8, FPC conductive circuit board 9, lower case 10, lower spacer 11, interface terminal 12, protruding magnet 13, groove magnet 14, connection female terminal 15, connection male terminal 16, wire protruding left housing 17, wire magnet 18, wire female terminal 19, wire right housing 20, wire 21, power interface terminal 22, wire connector 23, wire fixing protrusion 24, fixing connector 25, electrical connector 26, fixing groove 27, fixing protrusion 28.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 2, an embodiment of the present utility model is shown:

The utility model provides a building block fan, includes the fan main part, the inside FPC that is equipped with of fan main part switches on circuit board 9, FPC switches on circuit board 9 and fan motor electric connection, fan main part both sides are equipped with coupling assembling, coupling assembling includes electric connection piece 26, fixed connection piece 25, electric connection piece 26 and FPC switch on circuit board 9 electric connection, coupling assembling and wire connecting piece 23 shape matching and connection, wire connecting piece 23 is connected with power interface terminal 22 through wire 21.

Through adopting above-mentioned technical scheme, the inside FPC that is equipped with of fan main part switches on circuit board 9 intercommunication fan inside each part that needs the power and supplies power, FPC switches on circuit board 9 utilizes external power supply to supply power for the fan motor, the fan main part opposite side is equipped with coupling assembling, transverse arrangement can interconnect fixedly and switch on when having a plurality of building blocks fans, coupling assembling includes electric connection 26, fixed connection 25, electric connection 26 mutually matches and transmits electric power when having a plurality of building blocks fans, electric connection 26 establishes the effect that forms conductive power on FPC switches on circuit board 9, wire connection 23 shape and fixed connection 25 match, be equipped with the electrically conductive part who matches with electric connection 26 on the wire connection 23, wire connection 23 is connected with power interface terminal 22 through wire 21, external power source passes through wire 21 with electric power transmission for wire connection 23 from power interface terminal 22, and wire connection 23 is with electric power transmission for electric connection 26 on the fan, electric connection 26 provides electric power for the fan along FPC switches on circuit board 9 and realizes driving motor flabellum rotation's effect.

Preferably, the electrical connector 26 includes a male connector 16 and a female connector 15, the fixing connector 25 includes a fixing groove 27 and a fixing protrusion 28, and the wire connector 23 includes a female connector 19 and a wire fixing protrusion 24.

By adopting the above technical solution, the male connection end 16 of the electrical connection member 26 is a plug with a fixed pin, a pin or other shaped plug inserted into a mating connector or socket, so as to realize the function of conducting power, the female connection end 15 of the electrical connection member 26 is a connector with a hole, a slot or a socket capable of accommodating the male connection end 16, the male connection end 16 and the female connection end 15 allow transmission of electrical signals, power or data between the two devices when connected together, the shape of the fixing groove 27 of the fixing connection member 25 matches with and is buckled with the fixing protrusion 28, the arranged building block fan can be fixed when the fixing groove 27 and the fixing protrusion 28 are connected together, the female connection end 19 of the lead connection member 23 can accommodate the male connection end 16 to realize the transmission of power, and the lead fixing protrusion 24 of the lead connection member 23 is matched with the fixing groove 27 to realize the effect of fixing the lead 21 on the side wall of the fan.

Preferably, the male connection end 16 and the female connection end 15 are respectively disposed on opposite sides of the fan main body, the male connection end 16 and the female connection end 15 are mutually adapted and electrically connected, the fixing groove 27 and the fixing protrusion 28 are respectively disposed on opposite sides of the fan main body, the fixing groove 27 and the fixing protrusion 28 are mutually adapted, the fixing groove 27 and the male connection end 16 are located on the same side, and the fixing protrusion 28 and the female connection end 15 are located on the same side.

Through adopting above-mentioned technical scheme, connect public end 16 and connect female end 15 and establish respectively in relative fan main part side, connect public end 16 and connect female end 15 looks adaptation and electric connection each other, lateral arrangement can electric connection each other when having a plurality of building block fans, fixed recess 27 and fixed protruding 28 are established respectively in relative fan main part side, fixed recess 27 and fixed protruding 28 looks adaptation each other, lateral arrangement can mutual fixed connection when having a plurality of building block fans, fixed recess 27 and connect public end 16 and be located same one side, fixed protruding 28 and connect female end 15 and be located same one side, lateral even arrangement can realize fixed connection and electric connection simultaneously when having a plurality of building block fans.

Preferably, the fan bodies are fixedly connected and electrically connected with each other when being transversely and uniformly arranged.

By adopting the above technical scheme, the connecting male end 16 and the connecting female end 15 are also connected together to realize power transmission while the fixing grooves 27 of the plurality of fan bodies are connected with the fixing protrusions 28 of the side fan bodies.

Preferably, the groove magnet 14 is disposed inside the fixing groove 27, the groove magnet 14 is made of a ferromagnetic material, the protrusion magnet 13 is disposed inside the fixing protrusion 28, the protrusion magnet 13 is made of a ferromagnetic material, the wire magnet 18 is disposed inside the wire fixing protrusion 24, the wire magnet 18 is made of a ferromagnetic material, the groove magnet 14 and the protrusion magnet 13 are attracted to each other, and the groove magnet 14 and the wire magnet 18 are attracted to each other.

Through adopting above-mentioned technical scheme, the inside recess magnet 14 of fixed recess 27 is ferromagnetic material, the inside protruding magnet 13 of fixed arch 28 is ferromagnetic material, the inside wire magnet 18 of wire fixed arch 24 is ferromagnetic material, recess magnet 14 attracts each other with protruding magnet 13, connect a plurality of building block fans through the mode convenient and fast of magnetic attraction, recess magnet 14 attracts each other with wire magnet 18, be connected to the building block fan through the mode convenient and fast of magnetic attraction with the wire 21 of connecting external power supply.

Preferably, an interface terminal 12 is disposed above the FPC conductive circuit board 9, the interface terminal 12 is electrically connected with the fan motor, one end of the FPC conductive circuit board 9 is provided with a connection male end 16, and the other end of the FPC conductive circuit board 9 is provided with a connection female end 15.

Through adopting above-mentioned technical scheme, the interface terminal 12 of FPC switch on circuit board 9 top is connected with parts such as fan motor in the fan that need electric power, provides electric power for these parts, and interface terminal 12 gives fan motor with the electric power transmission of external power source, and FPC switch on circuit board 9 one end is equipped with the design that the connection male end 16 other end was equipped with and connects female end 15 and has linked together a plurality of building block fans, realizes the power transmission effect of series circuit when a plurality of building block fans connect.

Preferably, the fan main body is internally provided with a fan blade 1, the fan blade 1 is internally provided with a fan motor, the fan motor comprises a motor housing 2, a motor 3 and a motor bearing 4, the motor housing 2 is internally provided with the motor 3, and the motor housing 3 is internally provided with the motor bearing 4.

Through adopting above-mentioned technical scheme, the fan blade 1 in the fan main part rotates and can drive the air flow, and the fan motor in the fan blade 1 rotates and drives fan blade 1 and rotate, and the fan motor includes motor housing 2, motor 3, motor bearing 4, is equipped with motor 3 in the motor housing 2, and motor 3 turns into mechanical energy with the electric energy, rotates smoothly when being equipped with motor bearing 4 in the motor 3.

Preferably, the fan main body includes an upper shell 7, a diaphragm 8, and a lower shell 10, the upper shell 7 and the lower shell 10 are combined from top to bottom to form a fan housing, the FPC conductive circuit board 9 is located on the outer side wall of the diaphragm 8, two ends of the FPC conductive circuit board 9 leak out from two sides of the fan housing, and the diaphragm 8 is electrically connected with the conductive circuit board.

Through adopting above-mentioned technical scheme, fan housing is formed from last down to combination with inferior valve 10 to the upper casing 7 of fan main part, and FPC switches on circuit board 9 and is located the ring 8 lateral wall that leads, the both ends that FPC switches on circuit board 9 spill in fan housing both sides, will connect public end 16 and connect female end 15 and spill the fan housing and realize the connection of many building blocks fan, ring 8 and FPC switch on circuit board 9 electric connection, and FPC switches on circuit board 9 with the electric power transmission of external power source for ring 8 and realizes the luminous effect of ring 8.

Preferably, an upper cover 6 is arranged above the upper shell 7, two upper covers 6 are arranged, an upper gasket 5 is arranged above the upper shell 7, four upper gaskets 5 are arranged, a lower gasket 11 is arranged below the lower shell 10, and four lower gaskets 11 are arranged.

By adopting the technical scheme, the upper shell 7 is provided with the pit for containing the magnet, and the upper gasket 5 and the lower gasket 11 protect the fan shell from being damaged when being fixed by screws.

Preferably, an upper cover 6 is arranged above the upper shell 7, the upper cover 6 has two pieces, the wire connecting piece 23 is composed of a left wire protruding shell 17, a wire magnet 18, a female wire end 19 and a right wire shell 20, the left wire protruding shell 17, the wire magnet 18, the female wire end 19 and the right wire shell 20 are sequentially combined from left to right to form the wire connecting piece 23, the female wire end 19 is electrically connected with one end of a wire 21, and the other end of the wire 21 is connected with a power interface terminal 22.

Through adopting above-mentioned technical scheme, the protruding left shell 17 of wire connecting piece 23 matches with fixed recess 27, and the wire magnet 18 of wire connecting piece 23 attracts with the recess magnet in the fixed recess 27 each other, realizes fixing wire connecting piece 23 to fixed recess 27's effect, and the female end 19 of wire connecting piece 23 matches and electric connection with the public end 16 of being connected on the building block fan, female end 19 of wire and wire 21 one end electric connection, and the wire 21 other end is connected with power interface terminal 22, realizes the effect of transmitting the electric power of external power source to female end 19 of wire through this structure.

Working principle: utilize interface terminal 12 on FPC switch on circuit board 9, connect female end 15, connect public end 16 for the inside each part power supply of fan, and the fixed recess 27 of building block fan lateral wall, fixed protruding 28 mutually match and realize the fixed effect of a plurality of building block fans transverse arrangement connection, when external power source passes through wire connecting piece 23 with electric power transmission for first building block fan, the connection male end 16 of second building block fan inserts the connection female end 15 of first building block fan and obtains electric power, and so on, realize can not need the effect of the quick increase and decrease fan quantity of extra power supply wire 21.

When the building block fan is installed, the power interface terminal 22 is connected to an external power interface, then the wire connecting piece 23 is connected to the fixing groove 27 of the first building block fan, finally any number of building block fans are connected according to requirements, and the fixing groove 27 of the following building block is aligned with the fixing protrusion 28 of the last building block fan to be magnetically adsorbed, so that the installation is completed.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a building blocks fan, includes fan body, its characterized in that: the fan is characterized in that an FPC (flexible printed circuit) conducting circuit board (9) is arranged inside the fan body, the FPC conducting circuit board (9) is electrically connected with the fan motor, connecting components are arranged on two sides of the fan body and comprise an electric connecting piece (26) and a fixed connecting piece (25), the electric connecting piece (26) is electrically connected with the FPC conducting circuit board (9), the connecting components are matched with and connected with a wire connecting piece (23) in shape, and the wire connecting piece (23) is connected with a power interface terminal (22) through a wire (21).

2. A modular fan as claimed in claim 1, wherein: the electric connection piece (26) comprises a male connection end (16) and a female connection end (15), the fixed connection piece (25) comprises a fixed groove (27) and a fixed protrusion (28), and the wire connection piece (23) comprises a female wire end (19) and a fixed wire protrusion (24).

3. A building block fan according to claim 2, wherein: the fan is characterized in that the male connecting end (16) and the female connecting end (15) are respectively arranged on the side surfaces of the opposite fan main bodies, the male connecting end (16) and the female connecting end (15) are mutually matched and electrically connected, the fixing grooves (27) and the fixing protrusions (28) are respectively arranged on the side surfaces of the opposite fan main bodies, the fixing grooves (27) and the fixing protrusions (28) are mutually matched, the fixing grooves (27) and the male connecting end (16) are located on the same side, and the fixing protrusions (28) and the female connecting end (15) are located on the same side.

4. A modular fan as claimed in claim 3, wherein: the fan bodies can be mutually and fixedly connected and electrically connected when being transversely and uniformly arranged.

5. A building block fan according to claim 2, wherein: the fixed groove (27) is internally provided with a groove magnet (14), the groove magnet (14) is made of a ferromagnetic material, the fixed protrusion (28) is internally provided with a protrusion magnet (13), the protrusion magnet (13) is made of a ferromagnetic material, the wire fixing protrusion (24) is internally provided with a wire magnet (18), the wire magnet (18) is made of a ferromagnetic material, the groove magnet (14) and the protrusion magnet (13) are attracted to each other, and the groove magnet (14) and the wire magnet (18) are attracted to each other.

6. A building block fan according to claim 2, wherein: the fan comprises a fan motor, and is characterized in that an interface terminal (12) is arranged above the FPC conduction circuit board (9), the interface terminal (12) is electrically connected with the fan motor, a connection male end (16) is arranged at one end of the FPC conduction circuit board (9), and a connection female end (15) is arranged at the other end of the FPC conduction circuit board (9).

7. A building block fan according to claim 2, wherein: the novel fan comprises a fan body, and is characterized in that fan blades (1) are arranged in the fan body, a fan motor is arranged in the fan blades (1), the fan motor comprises a motor housing (2), a motor (3) and a motor bearing (4), the motor housing (2) is internally provided with the motor (3), and the motor bearing (4) is arranged in the motor (3).

8. A building block fan according to claim 2, wherein: the fan main body comprises an upper shell (7), an aperture guide (8) and a lower shell (10), wherein the upper shell (7) and the lower shell (10) are combined from top to bottom to form a fan shell, the FPC conducting circuit board (9) is positioned on the outer side wall of the aperture guide (8), two ends of the FPC conducting circuit board (9) leak out of two sides of the fan shell, and the aperture guide (8) is electrically connected with the FPC conducting circuit board (9).

9. The building block fan of claim 8, wherein: the upper cover (6) is arranged above the upper shell (7), the upper cover (6) is provided with two pieces, the upper gasket (5) is arranged above the upper shell (7), the upper gasket (5) is provided with four pieces, the lower gasket (11) is arranged below the lower shell (10), and the lower gasket (11) is provided with four pieces.

10. A building block fan according to claim 2, wherein: the wire connecting piece (23) comprises a wire protruding left shell (17), a wire magnet (18), a wire female end (19) and a wire right shell (20), the wire protruding left shell (17), the wire magnet (18), the wire female end (19) and the wire right shell (20) are sequentially combined from left to right to form the wire connecting piece (23), the wire female end (19) is electrically connected with one end of a wire (21), and the other end of the wire (21) is connected with a power interface terminal (22).