KR100397036B1 - Drive unit df air flow controlling device and method for producing the same - Google Patents

Abstract

The present invention relates to a drive unit device which is used as a driving end of a idle flow control device that automatically supplies a proper amount of air when idle of an automobile engine, and a method of manufacturing the same, and more specifically, an accessory constituting an existing drive unit. It relates to a drive unit device used as a driving end of the idling flow control device for greatly improving the overall problems due to the complexity of the manufacturing process and the closing end of the assembly coupling caused by the functional problem of the structure, and the manufacturing method thereof, The present invention protrudes the injection pressure protective jaw at both ends of the upper surface of the terminal portion to prevent coil breakage caused by the injection pressure during the injection, and the terminal terminal fitting groove is provided with a step that is supported by the horizontal portion of the upper surface of the terminal terminal portion to stabilize the terminal block And alignment are optimized and the yoke fits on the inside of the terminal body The inclined surface is formed to facilitate, and has a configuration of the member to smoothly compensate the state that the free end is inclined toward the bobbin due to the contraction when the terminal body is ejected, and the first fixing groove and the second fixing groove in the terminal terminal In addition to the basic magnetic flux path function of the yoke, the components that secure the safety of the weak part in manufacturing, the horseshoe which constitutes various functional horseshoe, ie yoke piece, stopper piece, and bushing piece are integrally manufactured in the press equipment. Functions, such as securing core assembly safety and supporting housing without the need for separate metallic bushings, greatly improved the durability, and the use of metal foils to create unstable densities caused by functional problems such as manufacturing processes. Structural Shape and Value of Magnetic Flux Intensity Caused by (Pin Groove, Bubble Generation, etc.) The limitations of various problems caused by excessive addition or the like of a manufacturing defect and then due to (not a thickness) of the production process was significantly improved.

On the other hand, the manufacturing process of the present invention includes a first assembly step of assembling the terminal terminal to the terminal body electrically connected to the ECU in the bobbin integral with the terminal body; A second assembling step of forming a coil assembly by winding the coil twice in two portions at the terminal terminal and the wire fixing end, and then soldering the coil to the terminal end to bend and fix the coil assembly to the upper surface of the bobbin; A third assembling step of assembling the coil assembly having the cylindrical core inserted into the yoke groove of the yoke piece in which the yoke piece stow piece and the bushing piece are stacked to form a drive assembly; A fourth assembly step of extruding and coating the resin on the surface of the drive assembly; The fifth assembly process is characterized in that the sealing operation is performed so that air is not leaked from each of the fixing holes, through holes, magnet insertion holes, and terminal portions of the driving end (unfinished product) formed by the fourth assembly process.

Description

Drive unit df air flow controlling device and method for producing the same}

The present invention relates to an idling flow control drive unit device and a method of manufacturing the same. More specifically, in a yoke having a detent shape, a multifunctional yoke, bobbin, and terminal terminals are formed by sequentially stacking a plurality of pieces. The present invention relates to a coupling structure, a structure in which two or more fixing grooves are formed in a terminal terminal for fixing a coil wound on a bobbin, and an idling flow rate control drive unit device having a stable injection molding and a method of manufacturing the same.

In general, the idle flow control drive unit consists of a choke valve, a venturi, a main nozzle, and a throttle valve where the fuel and air are mixed. When the engine is operated, the flow rate of air sucked from the top is increased in the venturi section. As it goes down, it comes with fuel. At this time, the fuel is swept into the air and mixed with the air while being atomized and flows downward, and the throttle module controls the amount of the supplied air.

The shaft with the throttle plate is installed in the air inlet of the throttle body, and the shaft with the throttle plate for controlling the amount of inlet air is installed.The shaft is connected to the throttle position sensor and the air inlet formed in the throttle body is connected with the bypass passage. Therefore, when the engine is idle, a flow rate actuator is provided to supply air at the idle line so that the driver can operate the engine without stepping on the accelerator pedal.

As described above, the engine is connected to a flow rate actuator for supplying external air to the engine when the engine is idle, and rotates a rotating shaft provided with a valve for controlling the amount of air, as shown in FIG. 1. Bobbin (secondary assembly process (see S200) after completion of the primary assembly process (see S100) for assembling the drive IC 110 to the terminal terminal 120 to apply a signal to the rotating shaft operating the conventional idle flow control valve ( When the 130 is formed, a drive IC is built in the coil assembly, and the coil assembly 150 is coupled to the winding and the drive IC 110 by coupling the coil 140, which is a third assembly process (see S300), to the bobbin 130. To form.

At this time, the assembly method of the primary assembly process (see S100) takes the assembly / fixing method by fusing or spot welding, and the assembly method of the secondary assembly process (see S200) is the assembly / fixing method by insert molding and The assembly method of the 3rd assembly process (refer to S300) takes the assembly / fixing method by fusing or spot welding which is the same method as the assembly method of a primary assembly process (refer to S100) after coil winding.

When the coil assembly 150 is formed, the core assembly 160 and the sintered yoke 170 are simultaneously assembled in the fourth assembly process (S400) in the fourth assembly process (S400) to form the drive assembly 180. Next, the metallic bushing 190 is separately inserted into the mold in the fifth assembly process (see S500), and then the synthetic resin 200 is pressed on the outer surface in the molding operation to form the drive unit 100 as the driving end.

On the other hand, in the structure of the conventional drive unit manufactured by the assembly process sequence as described above, in order to embed a separate drive IC in the drive end, the coil assembly process is complicated and insert molding is required in the molding work structure under high temperature and high pressure conditions. Therefore, the driving IC defect rate is also increased, and also the yoke 170 to which the coil assembly 150 is installed to be combined is composed of one sintered product by casting. Only the coil 140 is wound around the bobbin 130 and the core 160 and the yoke 170 are inserted when the core 160 is inserted into the coil assembly bent and bent at 90 ° to be coupled to the yoke 170. Coupling installation with the inner side of the assembly is difficult, and the number of parts and the process are complicated because a separate metallic bushing is required to support the housing during final molding. This becomes a problem was present.

Looking at the structure of the conventional drive unit 100 made by the assembly process as described above, as shown in Figure 2 attached to the drive IC and the terminal part fixed to the insert molding after fixing the parts, etc. while making the bobbin shape and bobbin ( An end portion of the coil 140 wound on the 130 has a connection end parallel to the center line of the bobbin 130 and is provided at an end portion of the wire fixing end that vertically protrudes to the upper end of the terminal body 122 where the terminal terminal 121 is installed. Since the end portion of the coil 140 is fixed by fusing or spot welding, the coil 140 extending to the bobbin 130 and the wire fixing end by injection pressure when the injection molding is performed using the synthetic resin 200 is performed. Due to the problem of disconnection and shrinkage of the cover, which is the insert mold filled between the bobbin 130 and the terminal body 122, the terminal body 122 does not form a vertical IC terminal terminal The free end to a problem in that the position angle of the θ of the connecting end is a terminal block 121 is coupled fusing to be held parallel to the inclined occurred.

On the other hand, the conventional drive unit device having a different structure as shown in Figure 3, the winding of the stator 300 and the coil 140a having a through-hole provided with a magnet for rotating the rotating shaft is provided with a valve for adjusting the amount of air supply Combining the bobbin 130a by the molding operation of the first assembly process (S700).

The coil terminal assembly A1 is formed by assembling or molding the terminal terminal 120a to the bobbin 130a in which the stator 300 is installed by a second assembly process S800, and the coil subassembly A1. After winding the coil (140a) to the third assembly step (S900) through a spot welding and fusing method, such as to form a complete coil assembly (A2).

Meanwhile, a cylindrical yoke plate A 170a is installed on the outer surface of the bobbin 130a constituting the complete coil assembly A2 and then the yoke plate B 170b for closing one side of the yoke plate A 170a is mounted. The yoke 1 (170c) is configured so that the cross-sectional shape has a U-shape by combining and fixing. Refer to 4th Assembly Process (S1000)

The fifth assembly is installed on one side of the yoke plate A (170a) and the yoke plate B (170b) to the core 1 (160a) that penetrates the one side of the yoke 1 (170c) and the bobbin (130a) is installed inside The process (S1100) is carried out to form the yoke subassay A (C1).

After the completion of the fifth assembling process (S1100), in the other direction in which the core 1 (160a) is installed, the yoke plate (170d) and the core 2 (160b) that are identical to the yoke plate B (170b) and the core 1 (160a) are inserted. The yoke subassembly B (C2) is formed by a 6 assembly process (S1200).

On the other hand, when the yoke subassembly B (C2) is completed, three combinations of the coil assembly A2, the yoke subassembly B (C2), and the yoke subassembly A (C1) are prepared by the seventh assembling process (S1300). Assembly to form the drive assembly 180a, and insert molding resin 200a on the outer circumferential surface of the drive assembly 180a through an eighth assembly process (S1400) to form an unfinished drive unit 100b and assembling the ninth assembly Tapping through the step (S1500) to form a completed drive unit (100a).

The conventional drive unit device having the structure as described above has a disadvantage in that the assembly process is too much, so the assembly work takes an excessive amount of time and the number of parts increases, resulting in a cost increase and a deterioration in quality.

The present invention has been made in view of the above problems, and its object is to support a housing with a housing along with a magnetic flux path function to form a yoke with multifunction by sequentially stacking a plurality of yoke pieces in a yoke having a detentto shape. In the case of the coil assembly, the coupling structure of the bobbin, the terminal terminal, and the coil wound on the bobbin and the terminal terminal fixing it can be changed to remove the weak structure during soldering, thereby improving the functionality and the number of parts, the number of processes, and the manufacture. In order to reduce the unit cost and secure stable injection molding, the injection pressure direction is specified and the stopper in the yoke is formed to facilitate the coupling with the core (lamination piece + cylinder), to prevent the disconnection by the injection pressure, and to resin the terminal body in the bobbin. Even if shrinkage occurs structurally, it is possible to stabilize / optimize terminal alignment by compensating for resin shrinkage. An idling flow control drive unit device and a method of manufacturing the same are provided.

The other purpose is that the horseshoe constituting various functional horseshoe, i.e., yoke piece, stopper piece, and bushing piece are integrally manufactured in the press equipment, and have a separate function besides the basic magnetic flux path function of the yoke, such as ensuring the safety of core assembly. The durability of the housing is greatly improved by enabling the housing supporting function without the parts of the metallic bushing, and the unstable density formation caused by the functional process such as the manufacturing process due to the use of metal thin plates (pin groove, bubble generation, etc.). The problems caused by the addition of post-processing and excessive manufacturing defects due to the change of the magnetic flux intensity due to the change of the magnetic flux strength and the limitation of the fabrication (small thickness) are greatly improved.

1 is a block diagram showing a manufacturing process of the drive unit of the conventional idle flow control device.

Figure 2a is a cross-sectional view showing the structure of a conventional coil assembly and Figure 2b is a plan sectional view showing a coupling structure between the IC lead and the terminal terminal inserted into the bobbin.

Figure 3a is a block diagram showing the manufacturing process of the drive unit of the conventional idle flow control device of another example and 3b is a cross-sectional view showing the structure of a conventional drive assembly.

Figure 4 is a block diagram showing the manufacturing process of the drive unit of the present invention idle flow control device.

Figure 5 is an exploded perspective view showing the structure of the drive unit of the idle flow control device applied technology of the present invention.

6 is a cross-sectional view illustrating a process of forming a coil assembly, and FIG. 6A is a cross-sectional view illustrating a coupling between a terminal body and a terminal terminal, and FIG. 6B illustrates assembly of a bobbin and terminal terminals to solder a coil end to a wire terminal after winding the coil. 6C is a partially enlarged cross-sectional view showing bending of a wire terminal after soldering.

FIG. 7A is a perspective view before coupling of the coil assembly and the yoke to which the core is inserted, and FIG. 7B is a perspective view after the coupling of the coil assembly to the core and the yoke.

8 is a cross-sectional view after insert molding in the idle flow control drive unit device of the present invention.

※ Explanation of code for main part of drawing ※

1: Drive end (finished product)

2: bobbin 3: terminal

4: coil 5: coil assembly

6: core 7: yoke

8: drive assembly 9: drive end (not finished)

10: resin 10a: sealing layer

30: terminal terminal 31: wire fixing terminal

31a, 31b: 1.2 fixed groove 32: connection terminal

34a: Injection pressure preventing jaw 34b: Emboss part

71: stopper piece 71a: stopper piece

71c: fixing hole 72: yoke

72a: York horseshoe 72e: yoke part

73: bushing 73c: through hole

The object of the present invention is a first assembly process of insert assembly to the bobbin terminal terminal electrically connected to the ECU; The coil is wound around the assembly formed by the first assembly process, the end of the coil is first wound several times on a predetermined portion of the wire fixing terminal that protrudes vertically toward the top of the terminal body, and then the end of the wire fixing terminal. A second assembling process of soldering and fixing the end of the coil after winding several times to form a coil assembly by bending the terminal terminal by 90 °; A stopper piece is formed by stacking a plurality of stopper pieces on one side of a yoke piece formed by stacking a plurality of yoke pieces, and a coil assembly and a core formed after the second assembly process, and a plurality of bushing pieces on both sides of the stopper piece. A third assembly step of assembling and coupling the yoke in which the bushing piece is installed to form a drive assembly; A fourth assembly step of insert molding the resin into the drive assembly formed by the third assembly step; Idle flow control drive unit device comprising a fifth assembling process for sealing the air to prevent the leakage of air in each of the fixing hole, through-hole and insertion hole of the drive end (unfinished product) by the fourth assembly process It is achieved by the manufacturing method of,

The manufacturing method of the idling flow control drive unit of the present invention is the insert assembly of the terminal terminal in the bobbin, winding and soldering the coil and bent 90 ° to form a coil assembly, and the coil assembly with the core assembled to the yoke In the idle flow control drive unit for insert molding on the outer surface after forming the drive assembly, the first end of the coil is wound several times in the first fixing groove of the wire fixing terminal formed perpendicular to the upper end of the terminal body, and then 2) A stopper piece is formed by stacking a plurality of stopper pieces on one side of the yoke piece formed by assembling the core to a coil assembly formed by soldering and fixing the end of the coil secondly to the fixing groove. On both sides below the stopper piece, a bushing piece composed of a plurality of bushing pieces is provided. Including in that a yoke coupled to the feature is realized by the idling flow rate control drive unit and wherein formed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a process diagram and an exploded perspective view showing a manufacturing process of the idle flow control drive unit of the present invention, according to the first assembly process of inserting the bobbin 2 and the terminal terminal 30 electrically connected to the ECU Winding the coil (4) to the assembly formed by (S10) by winding a number of times first to a predetermined portion of the wire fixing terminal 31 formed vertically to the upper end of the terminal body 34, and then upwards thereof The coil assembly 5 and the core 6 after the second assembling process (S20) of forming a coil assembly 5 by extending the length and winding the end of the coil 4 and soldering the end of the coil 4 and bending it by 90 °. On one side of the stopper piece piece 71 formed by stacking a plurality of stopper pieces 71a, a yoke piece 72 formed by stacking a plurality of yoke pieces 72a is provided, and both sides of the stopper piece 71 are provided below. With multiple bushing horseshoe 73a A synthetic resin material such as a sheath (10) on the outer circumferential surface of the drive assembly (8) through the third assembly process (S30) of assembling and coupling the yoke (7) formed by installing the cut bushing piece (73) to form the drive assembly (8). ) And the fixing holes (71c, 72c) and through holes (73c) of the fourth assembly step (S40) and the drive end unfinished product (9) by the fourth assembly step (S40) for extruding the insert to wrap the outer surface Provides a method for manufacturing an idle flow control drive unit is manufactured in the insertion hole (71b, 72b) and the fifth assembly step (S50) of the sealing operation to prevent the leakage of air to the terminal terminal.

The idle flow control drive unit of the present invention to be specifically implemented according to the method of the present invention will be described based on the accompanying drawings.

5 to 7 are exploded perspective and combination perspective views showing the structure of an idle flow control drive unit to which the technique of the present invention is applied, whereby the idle flow control drive unit 1 of the present invention is capable of winding the coil 4. It is composed of a bobbin (2), and a terminal (3), a core (6) and a yoke (7) that forms a gyro and supports the housing, which are assembled and fixed to the bobbin (2).

The bobbin (2) is typically provided with a separation prevention plate on both sides of the portion of the winding coil 4 on the outer periphery and the portion in which the ordinary coil 4 made of a thin solid metal wire is wound And a core insertion hole penetrating the center of the release preventing plate, and the core 6 is a metal material having a rod shape formed to penetrate the center of the bobbin 2.

On the other hand, the structure of the terminal terminal 30 inserted into the bobbin (2) is the first winding of the end of the coil 4 several times and then extending the length in the upward direction thereof to secure the end of the coil after several times winding One terminal of the wire fixing terminal 31 having the 1.2 fixing grooves 31a and 31b formed therein so as to be connected to the ECU bent in a direction orthogonal to the centerline of the bobbin 2 to connect the terminal terminal 32. Attached to the terminal body 34 having the same number of fitting grooves 35 as the number of connection connecting terminals 32, as shown in FIG. And 35b and 35c so as to align positions.

The inner surface of the terminal body 34 is formed with an embossed portion (34b) and the injection pressure preventing step (34a) is formed on both sides in the longitudinal direction of the upper end.

On the other hand, the structure of the yoke (7) to form the magnetic path and support the housing is fixed to the housing and rotatably fixed to the housing to the yoke (7) at both lower ends with respect to the installation hole (71b) that the magnet is inserted in the center The same shape as that of the stopper piece 71a on one side of the stopper piece 71 formed by stacking a plurality of stopper pieces 71a formed of a plurality of stopper pieces 71a corresponding to the body portion formed by the ball 71c and integrally vertically corresponding thereto. And a yoke piece 72 formed by stacking a plurality of yoke pieces 72a having a groove portion 72e is attached to both ends of the support part 72d, and both sides below the stopper piece 71a. The structure includes a bushing piece 73 formed by stacking a plurality of bushing pieces 73a having a fixing hole 71c and a corresponding hole 73c.

Referring to assembling each of the components formed as described above by the assembly process shown in Figure 4 attached to the terminal 3 as shown in Figs. 6 to 7 insert the assembly assembly terminal 3 in the bobbin (2) When the terminal terminal 30 is coupled to the fitting groove 35 of the 34 from the lower side to the upper side, the terminal terminal 30 is caught by the stepped portions 35a, 35b, and 35c so that the position is naturally aligned. (See the first assembly process.)

When the terminal terminal 30 is inserted into the fitting groove 35 of the terminal body 34 to form the terminal 3, the coil 4 is wound around the bobbin 2, which is the second assembly process S20. End of the first winding several times in the primary fixing groove (31a) of the wire fixing terminal 31 protruding to the upper terminal body 34, and then extending the length in the upward direction thereof 2 to the secondary fixing groove (31b) After several windings, the end of the coil 4 is soldered and fixed to the wire fixing terminal 31, and then bent 90 degrees to form the coil assembly 5.

Injection pressure bumps 34a formed at both sides in the upper longitudinal direction of the terminal body 34 block the action force of the injection pressure generated in the process of extruding the resin 10 to form a product appearance. It is to prevent the disconnection of weak parts of solder connection.

The core 6 is inserted into the core insertion hole of the bobbin 2 constituting the coil assembly 5, and the coil assembly 5 in which the core 6 is inserted is inserted into the yoke 7 again. Third assembly process (see S30)

The yoke 7 and the core 6 and the assembly process of the coil assembly 5 will be described in more detail. The yoke may be rotatable at both ends about the installation hole 71b in which a magnet is inserted in the center, The stopper piece 71 and the stopper piece 71 formed by stacking the stopper piece 71a formed of the core support part 71d corresponding to the upper portion integrally with the body part forming the fixing hole 71c to be fixed are stacked in the same shape as the stopper piece. When the same yoke piece 72 is coupled, the coil assembly 5 in which the core 6 is inserted into the groove formed by closing one surface of the yoke portion 72e formed in the yoke piece 72a, that is, the yoke portion 72e, is provided. Insert to form drive assembly 8.

At this time, at the lower end of the stopper piece 71, a bushing piece 73 formed by stacking a plurality of bushing pieces 73a having a through hole 73c corresponding to the fixing hole 71c is provided.

When the yoke 7 is coupled to the coil assembly 5 in which the core 6 is inserted, the free end of the terminal body 34 is moved into the bobbin 2 by the amount of natural resin shrinkage during injection molding of the terminal body 34. The deflection is generated by the angle of θ and shifted to the angle (deformation amount) of θ. The deformed angle is an embossed portion provided inside the yoke surface and the terminal body when the coil assembly 5 is assembled to the yoke 7. 34b) is contacted and the embossed portion (34b) protruding from the terminal body 34, the free end is pushed outwards while the deformed angle is compensated to maintain the terminal body 34 vertically terminal terminal 30 ) To prevent deformation.

Meanwhile, when the assembly of the drive assembly 8 is completed, insert molding the assembly into a mold to extrude the resin 10 to the outer circumferential surface by the fourth assembly process as shown in FIG. 8 to extrude the resin 10 to the surface. Idle flow control drive unit over the fifth assembling process (S50) for working the sealing (10a) to prevent the leakage of air in each of the fixing holes (71c, 72c) and through holes (73c) and insertion holes (71b, 72b) (1) is manufactured.

At this time, the fourth assembly is molded in the drive assembly 8 in the installation direction of the yoke piece 72 constituting the yoke 7 made by the third assembly step (S30), for example, the forming direction of the groove portion 72e. The injection pressure direction of step S40 is set.

The reason for this is to facilitate the assembly by applying an installation method in which the coil assembly 5 in which the core 6 is inserted is fitted in a loose fitting when the coil assembly 5 is inserted into the groove portion 72e of the yoke 7, This is because if the front part in which the groove portion 72e of the yoke 7 is formed is selected in the injection pressure direction, the core 6 is not detached from the yoke 7 and thus the assembly stability can be saved.

For example, when the injection pressure direction is set opposite to the groove portion 72e of the yoke 7, the core 6 is separated from the yoke 7 by the injection pressure.

On the other hand, the resin 10 is coated on the outer surface of the drive assembly 8 by insert molding as described above, and when the idle flow control drive unit is formed, the stopper piece 71 and the yoke piece 72 are fixed. ), The yoke supporting hole and the through hole are integrally formed in the yoke 7 by fixing the bolt through the fixing hole 71c and the through hole 73c provided in the bushing piece 73, It can be maximized.

In addition, the seal layer 10a is formed inside the fixing hole 71c of the plurality of bushing pieces 73a and the stopper piece 71a and the installation hole 71b in which the through hole 73c and the magnetic are inserted. The rotation shaft coupled with the idling flow control drive unit has an effect of preventing the leakage of the air supplied to the inside of the housing when combined with the housing, the sealing layer may be formed by a work method by coating, bonding, impregnation, etc. have.

The idling flow control drive unit device and the manufacturing method of the present invention configured as described above have a multifunctional yoke by sequentially stacking a plurality of yoke pieces in a yoke having a detentto shape to form a multifunctional yoke and a support function with a housing along with a magnetic flux path function. In the case of the coil assembly, the coupling structure of the bobbin, the terminal terminal, and the coil wound on the bobbin and the terminal terminal fixing the base are changed to eliminate the weak structure during soldering, thereby improving the functionality and reducing the unit cost, the number of parts and the number of processes. Designation of injection pressure direction and formation of stopper part to secure stable injection molding to facilitate yoke and core joining (one piece + cylinder), prevent deterioration of coil, prevention of disconnection by injection pressure, and shrinkage of resin after molding drive unit insert Even if this occurs, it is a device that stabilizes and optimizes terminal block alignment by compensating for resin shrinkage. It has the effect of performing.

Claims (9)

A first assembling process of insert inserting a terminal terminal electrically connected to the ECU to a terminal body integrally formed with a bobbin; The coil is wound around the assembly formed by the first assembly process, the end of the coil is first wound several times on a predetermined portion of the wire fixing terminal that protrudes vertically toward the top of the terminal body, and then the end of the wire fixing terminal. A second assembling process of forming a coil assembly by bending the end of the coil 90 ° after soldering several times to form a coil assembly; A stopper piece is formed by stacking a plurality of stopper pieces on one side of the yoke piece formed by stacking the coil assembly, the core and the plurality of yoke pieces formed after the second assembling process, and a plurality of bushing pieces are formed on both sides below the stopper piece. A third assembling process of assembling and coupling the yokes in which the bushing pieces are installed to form a drive assembly; A fourth assembling process of insert molding resin into a drive assembly formed by the third assembling process; In the idle assembly flow control drive unit device comprising a fifth assembly step of sealing work to prevent the leakage of air in each of the fixing hole, through-hole and insertion hole of the drive end unfinished product by the fourth assembly process Manufacturing method The method of manufacturing the idle flow control drive unit device according to claim 1, wherein the injection pressure direction of the fourth assembling process of molding the drive structure is set by the installation direction of the stopper pieces constituting the yoke. The method of claim 1, wherein the coil winding portion is formed so as to be located inside the entire area of the bobbin. [2] The method of claim 1, wherein the assembly direction of the terminal terminal assembled to the terminal body is aligned on the step of the fitting groove when the assembly direction of the terminal terminal is coupled from the lower side to the upper side. The method of claim 1, wherein a coupling method between the coil assembly and the yoke in which the core is inserted is coupled by a loose tolerance. In order to insert and assemble a terminal terminal electrically connected to the ECU, a coil is wound around a bobbin in which a terminal body having a fitting groove having a step is integrally formed so that its end portion is vertically protruded to the upper end of the terminal body. The coil assembly formed by winding the end of the coil several times in the first fixing groove firstly and then winding several times in the second fixing groove in the upward direction after bending the end of the coil by soldering 90 ° is laminated. A stopper piece formed by stacking a plurality of stopper pieces is installed on one side of the formed yoke piece, and a bushing piece consisting of a plurality of bushing pieces is installed on both sides of the stopper piece to be coupled to the formed yoke to form a drive assembly, which is then made of resin. Idle flow control rod, characterized in that made after the molding including a separate sealing Live unit device. The terminal body of claim 6, wherein the free body of the terminal body is moved to the bobbin side by the resin that is contracted during the injection molding of the terminal, and is pushed outward while contacting the yoke surface during assembly of the yoke to compensate for the deformation amount. Idle flow control drive unit device characterized in that it comprises an embossed portion to be vertical. 7. The idle flow control drive unit according to claim 6, wherein injection pressure bumps are formed at both sides in the longitudinal direction of the upper end of the terminal body coupled to the bobbin. 7. The idling flow control drive unit apparatus according to claim 6, wherein air holes and magnetic holes of the plurality of bushings and yoke pieces are inserted, and air leakage is prevented by sealing inside the terminal terminals.