JP2014155316A - Rotary electric machine and winch for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine in which thickness of a region where a power feeding mechanism for electrically connecting a coil and a feeder is present, is reduced and electrical connection with the coil can be automated.SOLUTION: Within a synthetic resin, a conductor plate is included in which thin plate metal conductor bodies connected with feeders for each of phases and insulated from each other are embedded. A current flows by connecting the conductor body for each phase and a coil end portion for each phase of a stator, and in a part of the conductor plate, a connecting socket is formed for connecting the conductor body and the coil end portion of the stator. By using the thin conductor body embedded in the synthetic resin in order to supply power to a coil of the stator, thickness of this portion can be reduced and the rotary electric machine can be thinned. Further, the coil end portion and the conductor body are connected by the connecting socket provided in the conductor plate, thereby attaining automation.

Description

  The present invention relates to a rotary motor, and more particularly, to a rotary motor having an improved power feeding mechanism for feeding power to a winding wound around a stator, and an elevator hoist.

  In general, a rotary motor is electrically connected between a power supply line and a winding by a wiring called a crossover as a power supply mechanism for flowing a current through a winding wound around an iron core of a stator. In the conventional rotary motor, branch wiring is performed by connecting and fixing the connecting wire connecting the winding of the stator and the feeder line with a crimp terminal.

  Specifically, as shown in FIG. 12, the end A of the winding is bent, the bent end A is brought into contact with the conductor C (crossover) from which the insulating coating B has been peeled, and the end of the bent winding is contacted. A and the conductor C are crimped and fixed so as to be sandwiched between copper crimping terminals D formed in a C shape. The crimping terminal D is joined by connecting the conductor C and the end A of the winding using a standard dedicated crimping tool corresponding to the crimping terminal D. A technique for connecting a jumper wire and a winding with such a crimp terminal is widely known.

  Then, the power supply connecting wire is fastened and fixed by, for example, tying it with a string after wiring, and then is led out to the outside of the main body of the rotary electric motor and connected to a power supply terminal block for connection to an external power supply electric wire. Is. In addition, if the capacity | capacitance of a rotary electric motor increases, the connecting wire for electric power feeding tends to become thick. A rotary electric motor using such a jumper is described in, for example, Japanese Patent Application Laid-Open No. 2011-217425 (Patent Document 1).

JP 2011-217425 A

  By the way, there is a strong demand for thinner rotary electric motors used in hoisting machines such as elevators, and as a countermeasure for this, various components are made smaller and thinner to make the cumulative thickness dimension as short as possible. Has been done. However, in a power feeding mechanism using a conventional crossover wire, the crossover wire tends to become thicker as the capacity of the rotary motor increases. For this reason, when the connecting wires of the respective phases of the rotary motor overlap, the thickness in the axial direction of the region where the connecting wires exist becomes longer, and the reduction in thickness is inhibited.

  Further, the structure in which the connecting wire and the end of the winding are connected by a crimp terminal as described above has the following problems. That is, since the connection of the stator windings and the jumper wires is a work limited to manual work, it is difficult to automate the assembly work of the rotary motor, and it takes a long time for the assembly work. There is a problem that it takes time to peel off the insulating coating of the connecting portion in advance, and the work speed and quality depend on the worker and cannot be removed.

  An object of the present invention is to reduce the thickness of a region where a power supply mechanism for electrically connecting a winding and a power supply line exists, and to perform electrical connection with the winding automatically. An object is to provide an electric motor and an elevator hoist.

  A feature of the present invention is that it has a conductive plate in which a thin plate-like conductive body for each phase connected to a feeder line is embedded in a synthetic resin, and winding of the conductive body and a stator winding on a part of the conductive plate. A connection socket for connecting the wire end portion is formed, and the conductor main body and the winding end portion of the stator winding are connected using the connection terminal in the connection socket.

  According to the present invention, since a thin conductor body embedded in a synthetic resin is used to supply power to the stator windings, the thickness of this portion can be reduced and the rotary motor can be made thinner. Is. Further, since the connection between the winding end and the conductor main body is performed using the connection terminal in the connection socket provided on the conductor plate, automation can be achieved.

It is a block diagram which shows the structure of the elevator to which the rotary electric motor of this invention is applied. It is an external view which shows the external appearance of the elevator hoist shown in FIG. It is a longitudinal cross-sectional view which shows the longitudinal cross-section of the rotary electric motor used for the winding machine for elevators shown in FIG. It is a front view of the conductor board used for the rotary electric motor which becomes one Example of this invention. It is the front view which abbreviate | omitted the synthetic resin of the conductor plate shown in FIG. 4, and exposed the conductor main body. It is sectional drawing which shows the AA cross section of FIG. It is an external appearance perspective view which shows the connection structure of the conductor board which becomes one Example of this invention, and a coil | winding edge part. It is sectional drawing of the connection socket formed in the conductor board. It is a front view when the divided conductor plate which becomes another Example of this invention is integrated. FIG. 10 is an enlarged exploded perspective view of a portion B in FIG. 9, illustrating a coupling method for coupling the divided conductor plates illustrated in FIG. 9. It is explanatory drawing which compared the connection method by the conventional crossover and the connection method by this invention. It is explanatory drawing which shows the connection method of the conventional crossover.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  Before describing the embodiment of the present invention, an elevator and a hoisting machine for an elevator in which a rotary electric motor targeted by the present invention is used will be described.

  FIG. 1 is a cross-sectional view for explaining a general configuration of a machine room-less elevator. Reference numeral 10 is a hoistway provided in a building, in which the elevator is accommodated. The elevator has a car 11, a counterweight 12 and a hoisting machine 13 as main components. A pulley 14 is attached to the lower part of the car 11, and a pulley 15 is attached to the counterweight 12. A sheave 16 is attached to 13 rotation shafts (= rotation shaft of an electric motor). Here, although the hoisting machine 13 is mounted on the floor surface at the bottom of the hoistway 10, the hoisting machine 13 may be attached to a beam fixed near the top of the hoistway 10.

  A beam 17 is fixed to the upper part of the hoistway 10, and intermediate pulleys 18A and 18B are attached to the beam 17, so that the winding direction of the main rope 19 is changed. One end of the main rope 19 is attached to the upper wall surface of the hoistway 10, and starting from this one end, the pulley 15 of the counterweight 12, the first intermediate pulley 18A, the sheave 16 of the hoisting machine 13, and the second intermediate The other end is attached to the upper wall surface of the hoistway 10 through the pulley 18 </ b> B and the pulley 14 of the car 11.

  This roping is called 2-to-1 roping, and the hoisting force of the hoisting machine 13 is reduced using the principle of a moving pulley. A shock absorber 191 is provided at the lower portion of the counterweight 12 to buffer the impact caused by the collision of the counterweight 12. It is what has been.

  In such an elevator, an operation command is given to an electric motor, a braking mechanism, or the like of the hoisting machine 13 by a controller (not shown), and the car 11 moves up and down toward a predetermined level of the building by the operation command. It is.

  FIG. 2 shows the appearance of an elevator hoisting machine, in which an electromagnetic braking mechanism 20 is attached vertically. During operation, the electromagnetic braking mechanism 20 energizes the electromagnetic coil to attract the braking shoe 21 by electromagnetic force, so that the drum 22 of the hoisting machine 13 can freely rotate. On the other hand, when braking is applied, the energization of the electromagnetic braking mechanism 20 is stopped and the braking shoe 21 is pressed against the drum 22 by a compression spring to apply the braking.

  Next, a specific configuration of the thin hoisting machine 13 will be described with reference to FIG. The housing body 24 of the housing assembly 23 has a boss portion 25 formed at the center thereof, and a fixed main shaft 26 is fixed in the boss portion 25. Further, the sheave 16 is rotatably supported on the free end side of the fixed main shaft 26 to constitute a hoisting machine having a cantilever support structure.

  The annular housing recess 27 located on the outer peripheral side of the boss 25 of the housing body 24 houses electrical components such as the stator core of the stator 28 and the stator winding 29 that constitute the motor unit. Yes. Further, a sheave housing 31 is rotatably supported on the free end side of the fixed main shaft 26 via a bearing 30. The sheave housing 31 includes an electric motor portion such as a sheave 16 and a rotor 32 constituting an electric motor portion. It is constructed integrally. A plurality of permanent magnets 33 are fixed to the inner peripheral surface of the rotor 32. Therefore, this constitutes a rotor of a surface magnet type rotary electric motor. In this case, the rotor 32 needs to be a magnetic body, and is integrally formed of the magnetic body together with the sheave housing 31 and the sheave 16.

  The permanent magnets 33 arranged inside the rotor 32 are alternately arranged with N poles and S poles in the circumferential direction. The numbers of N poles and S poles are the same, and the number is half the number of poles. Such a rotor 32 is disposed to face the outer side of the stator 28 disposed in the housing recess 27 integrally formed with the housing body 24 in the radial direction with a minute air gap interposed therebetween. Then, the rotational force generated by the rotary motor is transmitted to the sheave 16 via the rotor 32, and the plurality of main ropes 19 wound around the sheave 16 are driven to move the car 11 up and down. become.

  Since the above configuration is a well-known and well-known configuration, further description is omitted. Next, an embodiment of the present invention will be described with reference to the drawings.

  Returning to FIG. 3, the winding end 29 </ b> A of the stator winding 29 is connected to the conductor plate 34. The conductor plate 34 has a plate shape formed in an annular shape, and this annular conductor plate 34 is fixed to a flat annular step portion 35 formed on the outer periphery of the boss portion 25. ing. The conductor plate 34 has a metal conductor body embedded in a synthetic resin, and this conductor body is connected to the winding end 29 </ b> A via a connection socket 36. The conductor main body is connected to the inverter device by a power supply line (not shown), and the AC current of each phase generated by the inverter device is supplied to each phase of the stator winding 29.

  Next, details of the above-described conductor plate 34 will be described with reference to FIGS. As shown in FIG. 4, the conductor plate 34 is composed of an annular synthetic resin and a conductor body, and a predetermined number of connection sockets 36 are arranged in an annular shape on the outermost peripheral side. The number of connection sockets 36 is determined by the number of poles of the rotary motor, and is arbitrarily set according to the specifications of the rotary motor.

  FIG. 5 shows a state in which the synthetic resin of the conductor plate 34 has been peeled off to the vicinity of the conductor body. Inside the conductor plate 34, a U-phase conductor body 37, a V-phase conductor body 38, and a W-phase conductor body formed in an annular shape are shown. A conductor main body 39 is embedded. Further, a neutral point conductor body 40 and a transition conductor body 41 are embedded for each phase on the outer peripheral side of the conductor bodies 37 to 39 of each phase.

  As shown in FIG. 6, the conductor bodies 37 to 41 are made of metal, for example, copper, and are processed into a thin plate shape. Therefore, when the conductor plate 34 is formed in this embodiment, the copper thin plate conductor bodies 37 to 41 punched into a predetermined shape are arranged in a predetermined mold, and in this state, the synthetic resin R is poured into the insert. What is necessary is just to perform molding (molding). In FIG. 6, the conductor body 41 is not shown. Further, a connection socket 36 is simultaneously formed of synthetic resin on the outside of the conductor plate 34, and a connection pin 48 (see FIG. 8) formed integrally with the conductor body 38 is planted in the connection socket 36. Yes.

  Although the connection socket 36 shows a dedicated connection terminal 42, the connection terminal 42 is used to connect the winding end 29 </ b> A and the connection pins 48 of the conductor bodies 37 to 41. After being assembled to the stepped portion 35, it is driven by an automatic machine. Here, the conductor bodies 37 to 41 are spaced apart in the circumferential direction and further spaced apart in the vertical direction, so that the synthetic resin R is interposed between the respective conductor bodies 37 to 41 to each other. The electrical insulation is intended.

  Further, in this embodiment, since sufficient strength of the conductor plate 34 is ensured and the application category of the rotary motor of the elevator is F type, the synthetic resin R adopts polybutylene terephthalate (PBT) having a heat resistance of 150 ° C. doing. The U-phase conductor main body 37, the V-phase conductor main body 38, and the W-phase conductor main body 39 are connected to the inverter device by power supply lines (not shown).

  Thus, since the plate-like conductor plate 34 has the same power supply function as that of the jumper wire, the thickness of this portion can be reduced as compared with the connection using the conventional jumper wire, and as a result, the rotary motor can be made thinner. It can contribute to.

  Next, a connection structure between the winding end 29A of the stator winding 29 wound around the stator core of the stator 28 and the conductor plate 34 will be described. FIG. 7 shows a perspective view when a part of the connection portion between the conductor plate 34 and the winding end portion 29 </ b> A constituting the power feeding mechanism is cut out, and FIG. 8 is a longitudinal sectional view showing a cross section of the connection socket 36. It is.

  In FIG. 7, a concentrated winding 29 is attached to the stator core 43 of the stator 28 via an insulating bobbin 44. The insulating bobbin 44 located on the inner peripheral side is formed with a vertical groove 44A through which the winding end portion 29A is inserted, and the winding end portion 29A extends beyond the connection socket 36 through the vertical groove 44A. . Further, an insulating material 45 is interposed between the stator core 43 and the winding end portion 29 </ b> A for insulation, and this insulating material 45 is formed integrally with the insulating bobbin 44.

  As can be seen in FIGS. 3 and 8, each connection socket 36 extends perpendicularly from the conductor plate 34 in the axial direction of the fixed main shaft 26, and is integrally formed with the conductor plate 34 by the synthetic resin R. . The inside of these connection sockets 36 is divided into two chambers 46A and 46B by an insulating wall 51. A mating groove 36A for inserting and extending the winding end portion 29A is formed in one chamber 46A, and a winding receiving portion 47 for supporting the winding end portion 29A is fixed on an extension line of the mating groove 36A. It is planted at right angles toward the axial direction of the main shaft 26. In the other chamber 46B, connection pins 48 extending from the conductor body 37 are also planted at right angles toward the axial direction of the fixed main shaft 26. The connection pins 48 extend from the conductor bodies 37 to 41 to the connection sockets 36.

  Therefore, the winding end 29 </ b> A is set in the winding receiving portion 47 with the conductor plate 34 placed on the stepped portion 35. In FIG. 8, the right side shows a state before the connection terminal 42 is driven into the connection socket 36, and the left side shows a state after the connection terminal 42 is driven into the connection socket 36. In this state, the connection terminal 42 is driven into the connection socket 36 from the automatic machine.

  The connection terminal 42 includes a pair of connection slits 42A and 42B. One connection slit 42A is press-fitted into the winding end 29A, and the other connection slit 42B is press-fitted into the connection pin 48, thereby The portion 29A and the connection pin 48 are electrically connected. The connection terminal 42 uses copper as a base material and is plated with tin from above.

  In this way, the winding end 29A of the winding 29 wound around the insulating bobbin 44 is inserted into the mating groove 36A of the connection socket 36 and the connection terminal 42 is driven from above, so that the winding in the connection socket 36 is achieved. The end 29A and the connection pin 48 can be automatically connected. When molding the connection socket 36, it is also effective to form a shape that prevents the connection terminal 42 from coming out when the connection terminal 42 is driven.

  Here, in the present embodiment, the connection sockets 36 are formed in an annular shape on the outermost periphery of the conductor plate 34. Therefore, the connection terminals 42 are sequentially arranged in an automatic manner while the stator 28 is rotated. You will be able to type in.

  In the present embodiment, the connection socket 36 is integrally formed on the conductor plate 34 side. However, when the winding end 29A is connected, the insulation bobbin is caused by an impact load when the connection terminal 42 is driven by an automatic machine. This is to prevent damage to the synthetic resin portion 44 and the connection socket 36. In addition, since the strength of the synthetic resin varies depending on how many types of application of the rotary motor are supported, it is important to appropriately select the material and dimensions of the synthetic resin used for the conductor plate 34.

  In this embodiment, since the strength of the conductor plate 34 is ensured and the application category of the elevator rotary motor is F type, polybutylene terephthalate (PBT) is adopted to provide heat resistance of 150 ° C. Yes. As described above, the synthetic resin may be selected so as to satisfy the strength suitable for the operation of driving the connection terminal 42 and the heat resistance temperature of the standard of the application category.

  Further, in this embodiment, the conductor plate 34 is formed integrally as a whole as shown in FIG. 4 and is a molded product having a diameter of 350 mm. When the conductor plate 34 is formed integrally as shown in FIG. 4, since the conductor plate 34 is integrated, it is easy to mount, and there is an effect that errors due to forming can be reduced.

  As described above, the conductor plate having the conductor main body embedded in the synthetic resin is formed, and the connection socket for connecting the winding end portion and the conductor main body is formed, and the winding end portion is accommodated in the connection socket to connect the connection terminal. By driving into the connection socket, the connection between the connection pin connected to the conductor main body provided in the connection socket and the winding end is performed, so that automation can be achieved.

  As a result, since the connection of the stator windings and the crossover wires is limited to manual work as in the prior art, it is difficult to automate the assembly work of the rotary motor, and the assembly work takes a long time. And the problem that the work speed and quality depend on the operator and cannot be relieved because it takes time and effort to peel off the insulating film at the connecting portion of the crossover in advance.

  Next, another embodiment of the present invention will be described. As can be seen from FIG. 5, the shape patterns of the conductor bodies 37 to 41 embedded in the conductor plate 34 have a predetermined regularity. Therefore, apart from the configuration in which the whole is integrally molded as shown in FIG. 4, it is also possible to configure the conductor plate 34 by dividing and combining the unit pieces with regularity. Such a conductor plate 34 will be described with reference to FIGS. Here, FIG. 10 shows a portion obtained by cutting out the coupling surface of the portion B shown in FIG.

  In FIG. 9, the conductor plate 34 is composed of unit conductor plates 34A, 43B34C, and 34D that are divided into 90 ° unit pieces. Since these unit conductor plates 34A, 34B, 34C, and 34D have the same shape, the same molding die can be used. As a result, the size of the mold can be reduced, and the cost of the molding mold can be kept low. Then, the unit conductor plate 34A and the unit conductor plate 34B are coupled by a coupling surface 34A-B extending in the radial direction, and are similarly coupled by a coupling surface 34B-C, a coupling surface 34C-D, and a coupling surface 34D-A. Yes.

  As shown in FIG. 10, the shape of the coupling surface is exposed such that the conductor bodies 37 to 41 protrude by a predetermined length “L” from one side surface, here the side surface in the radial direction of the unit conductor plate 34B. doing. On the other hand, a concave portion 49 in which no synthetic resin is present is formed on the side surface of the unit conductor plate 34C facing the side surface of the unit conductor plate 34B so that the conductor bodies 37 to 41 are exposed. The recess 49 extends in the circumferential direction by the predetermined length “L”, and the conductor bodies 37 to 41 of the unit conductor plate 34B are accommodated in the recess 49.

  The unit conductor plate 34B and the unit conductor plate 34C can be firmly fixed by screwing the fixing screw 50 in a state where the conductor bodies 37 to 41 of the unit conductor plate 34B are accommodated in the recesses 49 of the unit conductor plate 34C. it can. Similarly, the unit conductor plate 34A and the unit conductor plate 34B, the unit conductor plate 34C and the unit conductor plate 34D, and the unit conductor plate 34D and the unit conductor plate 34A can be fixed.

  As described above, in this embodiment in which the conductor plate is divided into unit conductor plates, the molding die of the unit conductor plate can be reduced in size, so that the cost of the molding die can be reduced.

  FIG. 11 shows the effect of thinning according to the embodiment of the present invention as described above. In FIG. 11, in the case where the conventional crossover is used, the U, V, and W phase wirings overlap each other, and a space having a length close to 20 mm is necessary. The thickness was reduced to 15 mm and reduced to 5 mm, and in the plane region where the conductor body was located, the thickness was reduced to 8 mm and 12 mm could be reduced.

  As described above, according to the present invention, the synthetic resin includes a conductor plate in which a thin metal conductor body connected to the power supply line for each phase and insulated from each other is embedded, Each conductor body is connected to the winding end of each phase of the stator and current flows, and a connection socket for connecting the conductor body and the winding end of the stator is formed on a part of the conductor plate. I made it.

  In this manner, since the thin conductor body embedded in the synthetic resin is used to supply power to the stator windings, the thickness of this portion can be reduced and the rotary electric motor can be made thinner. Further, since the connection between the winding end and the conductor main body is made by the connection socket provided on the conductor plate, automation can be achieved.

  DESCRIPTION OF SYMBOLS 11 ... Car, 12 ... Counterweight, 13 ... Hoisting machine, 16 ... Sheave, 26 ... Fixed spindle, 27 ... Storage recessed part, 28 ... Stator, 29 ... Winding, 29A ... Winding end 32, DESCRIPTION OF SYMBOLS ... Rotor, 33 ... Permanent magnet, 34 ... Conductor plate, 35 ... Step part, 36 ... Connection socket, 37-41 ... Conductor body, 44 ... Bobbin, 44A ... Vertical groove (matching groove), 45 ... Insulating material, 47 ... winding receiving part, 48 ... connection pin, 51 ... insulating wall.

Claims (15)

A housing main body that houses a stator core and a stator winding, a fixed main shaft that is provided on the main body of the housing and has one free end, and is rotatably attached to the free end of the fixed main shaft via a bearing. In a rotary electric motor comprising a rotor having a permanent magnet facing the stator core,
A conductor plate for each phase in a thin plate shape, which is connected to the feeder line and insulated from each other, is embedded in a synthetic resin, and the conductor body and the stator winding are part of the conductor plate. A rotary electric motor characterized in that a connection socket for connecting a winding end is formed, and the conductor main body and the winding end of the stator winding are connected using a connection terminal in the connection socket. . In claim 1,
The rotary electric motor according to claim 1, wherein the conductor plate is arranged in a step portion formed in the casing body around the fixed main shaft. In claim 1 or claim 2,
The conductor plate is formed in a plate-like annular shape, and the conductor body for each phase is formed in an annular shape in the circumferential direction, and is arranged at intervals in the vertical direction. A rotating electric motor characterized in that a conductor body is insulated by a synthetic resin. In claim 3,
The connection socket is formed integrally with the conductor plate by a synthetic resin forming the conductor plate, and is formed in a ring shape on the outer peripheral side of the conductor plate. . In any one of Claims 1 thru | or 4,
The rotary electric motor according to claim 1, wherein the connection socket is formed to extend toward the rotor along the axial direction of the fixed main shaft. In any one of Claims 1 to 5,
The rotary electric motor is characterized in that the conductive plate is insert-molded by pouring a synthetic resin after the conductive body punched out of a thin plate metal is placed in a molding die. In claim 3,
The conductor plate embeds all of the conductor main body and integrally forms all of the connection sockets at the same time. In claim 3,
The rotary electric motor is characterized in that the conductor plate is formed by connecting a plurality of unit conductor plates in which a part of the conductor body is embedded and a part of the connection socket is integrally formed at the same time. In claim 8,
The rotating electric motor according to claim 1, wherein the connecting portions of the unit conductor plates have corresponding conductor bodies of the unit conductor plates fixed by screws. In any one of Claims 1 to 9,
The connection socket is composed of a pair of rooms divided by an insulating wall, the winding end of the stator winding is disposed in one room, and the connection pin connected to the conductor body in the other room , Wherein the winding tip and the connection pin are connected by the connection terminal. In claim 10,
The rotary electric motor, wherein the connection terminal is driven into the connection socket by an automatic machine to connect the winding tip and the connection pin. In claim 10 or claim 11,
The rotary motor according to claim 1, wherein a winding receiving portion for supporting the winding end portion of the stator winding is formed in the one chamber of the connection socket. A housing body containing a stator core and a stator winding, a fixed main shaft with one side fixed to the housing main body and the other as a free end, and a free end side of the fixed main shaft that can be rotated via a bearing In an elevator hoisting machine comprising a sheave attached to a main rope and a rotor having a permanent magnet that is formed integrally with the sheave and faces the stator core,
A conductor plate for each phase in a thin plate shape, which is connected to the feeder line and insulated from each other, is embedded in a synthetic resin, and the conductor body and the stator winding are part of the conductor plate. A connection socket for connecting a winding end is formed, and the conductor main body and the winding end of the stator winding are connected using a connection terminal in the connection socket. Hoisting machine. In claim 12,
An annular step portion is formed on the casing main body around the fixed main shaft, and the conductor plate formed in an annular shape in a plate shape is fixed to the step portion, and an outer periphery of the conductor plate The elevator hoisting machine, wherein the conductor main body and the winding end of the stator winding are connected by the connection socket provided in the vicinity. In claim 14,
The connection socket is composed of a pair of rooms divided by an insulating wall, the winding end of the stator winding is disposed in one room, and the connection pin connected to the conductor body in the other room Is disposed, and the winding tip and the connection pin are connected by the connection terminal.

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