JP2010081706A - Structure and method for connecting electric component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively connect a plurality of connection terminals of an electric component to be housed in a housing to a plurality of external connection terminals protruding from the housing. <P>SOLUTION: A structure for connecting an electric component includes a plurality of lead frames 5 in which a connection portion 5a to a connection terminal 3a of an electric component 3 and external connection terminals 5b are integrally formed, wherein the plurality of lead frames 5 are each such that the connection portions 5a are connected to the connection terminals 3a of the electric component 3, and the external connection terminals 5b are fixed on the housing 2A in a state that the external connection terminals 5b protrude from terminal insertion holes 2b formed on the housing 2A. A plurality of concave portions 2a are provided on the housing 2A, and a plurality of lead frames 5 are fitted into the concave portions 2a respectively, and a fixing member 6 for sandwiching the lead frames 5 between itself and the housing 2A and fixing the lead frames 5 may be provided. A printed wiring board for mounting a component for controlling the electric component 3 may be used as the fixing member 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure and method for connecting a plurality of connection terminals of an electrical component housed in a housing and a plurality of external connection terminals protruding from the housing.

  A conventional motor driving device used for an electric valve or the like includes a motor housed in a housing and having a plurality of connection terminals, and a plurality of external connection terminals protruding from the housing, for example, as shown in FIG. A plurality of connection terminals 102 a of the motor 102 are connected to the printed circuit board 103, the printed circuit board 103 is connected to the printed circuit board 105 via the lead wires 104, and the external connection terminal 106 is connected to the printed circuit board 105.

  However, in the above conventional connection structure, since the two printed boards 103 and 105 and the lead wire 104 exist from the connection terminal 102a of the motor 102 to the external connection terminal 106, each connection portion is made of solder or the like. Therefore, it is necessary to make an electrical connection, which takes time and labor for the connection work, and the number of parts increases, which increases the manufacturing cost of the motor drive device.

  Therefore, in order to reduce the manufacturing cost of the device by improving the assemblability of the rotary drive device and reducing the number of parts, Patent Document 1 discloses that a power feeding terminal and an external connection terminal are provided in the case using the same printed circuit board. There is described a rotary drive device that is electrically connected on the same plane and connects a motor connection portion and an external connection terminal with a single printed circuit board.

JP 2004-229378 A

  However, also in the rotation drive device described in Patent Document 1, when electrically connecting the power supply terminal and the external connection terminal, the power supply terminal and the printed circuit board are connected, and the printed circuit board and the external connection terminal are connected. Since it is necessary, at least two soldering operations are required, and there is room for improvement in terms of labor for connecting operations and reduction in the number of components.

  Accordingly, the present invention has been made in view of the problems in the above-described conventional technology, and a plurality of connections of electrical components housed in a housing, such as a motor drive device used for an electric valve, the rotary drive device, and the like. It is an object to connect the terminal and a plurality of external connection terminals protruding from the housing at a low cost.

  In order to achieve the above object, the present invention comprises a housing, a plurality of external connection terminals protruding from the housing, and an electrical component housed in the housing and having a plurality of connection terminals, A connection structure for electrical components, wherein each connection terminal is electrically connected to a connection terminal of the electrical component, and a plurality of connection portions with the connection terminals of the electrical component and the external connection terminals are integrally formed. Each of the plurality of lead frames includes the connection portion connected to a connection terminal of the electrical component and the external connection terminal protruding from a terminal insertion hole formed in the housing. It is fixed to the housing.

  According to the present invention, the connection terminal of the electrical component and the external connection terminal can be electrically connected with one lead frame, so that the number of components can be reduced and the assemblability is also improved. The cost required for connection can be greatly reduced. In addition to this, it is possible to minimize the possibility of connection failure between the connection terminal of the electrical component and the external connection terminal. Furthermore, since the external connection terminal of the lead frame is inserted through the terminal insertion hole of the housing and fixed by the housing, the external connection terminal can be easily positioned.

  In the electrical component connection structure, the housing is provided with a plurality of recesses, and each of the plurality of lead frames is fitted into each of the plurality of recesses, and the plurality of lead frames are sandwiched between the housings. Then, a fixing member for fixing can be provided. According to this configuration, since each of the plurality of lead frames is fitted into each of the plurality of recesses provided in the housing, each lead frame can be held in a stable state, and each lead frame can be connected to the housing. Because it is fixed to the fixing member, when attaching a connector etc. to the external connection terminal, the external connection terminal will not be buried in the housing even if a load is applied to the external connection terminal, and it will be firmly attached to the connector etc. Can be connected.

  In the electrical component connection structure, the fixing member can be a printed circuit board on which a component for controlling the electrical component is mounted, and the number of components can be further reduced by using the printed circuit board as a fixing member. be able to.

  Furthermore, the present invention includes a housing, a plurality of external connection terminals protruding from the housing, and an electrical component housed in the housing and having a plurality of connection terminals, each of the plurality of external connection terminals being A method of connecting an electrical component by electrically connecting to a connection terminal of the electrical component, wherein a plurality of lead frames formed integrally with the connection portion of the electrical component and the external connection terminal are integrated. A step of preparing a wiring member connected to each other, a step of connecting connection portions of the plurality of lead frames to connection terminals of the electrical components, and a connection of the plurality of lead frames constituting the wiring member A step of cutting each of the portions, and storing the electrical component to which the plurality of lead frames are connected in the housing, and externally connecting the plurality of lead frames. Inserting a terminal into a terminal insertion hole formed in the housing and projecting the plurality of lead frames from the terminal insertion hole; and fixing the plurality of lead frames to the housing. It is characterized by.

  Then, according to the present invention, the wiring member in which the plurality of lead frames are integrally continuous is fixed to the housing, and all the connection parts of the lead frames and the connection parts of the electrical components are all connected. The lead frame can be connected to the electrical component, and after connecting the wiring member to the electrical component, the connecting portion of the lead frame is cut, so that a plurality of lead frames can be easily connected without requiring a lead frame positioning step. Leadframes can be connected to electrical components. Thereby, the cost required for connection can be significantly reduced. Furthermore, it is possible to minimize the possibility of a connection failure between the connection terminal of the electrical component and the external connection terminal, and insert the external connection terminal of the lead frame from the terminal insertion hole of the housing. Therefore, the external connection terminals can be easily positioned.

  In the electrical component connecting method, in the step of fixing the plurality of lead frames to the housing, the housing is provided with a plurality of recesses, and each of the plurality of lead frames is fitted into each of the plurality of recesses, A fixing member that clamps the plurality of lead frames between the housing and the housing can be used. As a result, each lead frame can be held in a stable state, and the external connection terminal is buried in the housing even when a load is applied to the external connection terminal when a connector or the like is attached to the external connection terminal. And can be firmly connected to a connector or the like.

  In the electrical component connection method, the fixing member can be a printed board on which a component for controlling the electrical component is mounted, and the number of parts can be further reduced by using the printed board as a fixing member. be able to.

  As described above, according to the present invention, there is provided a connection structure and a connection method for electrical components, which can reduce the number of components, improve the assemblability, and can greatly reduce the cost required for connection. Can be provided.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, a case where the connection structure for electrical components according to the present invention is applied to a motor drive device will be exemplified.

  FIG. 1 shows the motor drive device. The motor drive device 1 is roughly composed of a housing 2 (2A, 2B), a motor 3, a gear train 4, a lead frame 5, and the like.

  The housing 2 is divided into two parts, an upper housing 2A and a lower housing 2B. The upper housing 2A accommodates the motor 3, the lead frame 5, etc., and these constitute the electrical component connection structure according to the present invention. . A gear train 4 that is rotationally driven by the motor 3 is accommodated in the lower housing 2B. As shown in FIG. 2, the upper housing 2 </ b> A is inserted and fixed with a motor housing portion 2 c that houses the motor 3, a plurality of recesses 2 a into which the lead frame 5 is inserted, and an external connection terminal 5 b of the lead frame 5. For this purpose, a plurality of terminal insertion holes 2b are provided.

  As shown in FIG. 1A, the motor 3 includes a plurality of connection terminals 3a and an output shaft 3b, and the gears 11 to 16 constituting the gear train 4 are rotated by the rotation of the output shaft 3b. The sixth gear 16 and a rotation shaft (not shown) mounted on the sixth gear 16 rotate to open and close a valve such as an electric valve.

  As shown in FIGS. 1A and 1B, the gear train 4 includes a first gear 11 mounted on the output shaft 3 b of the motor 3 and a second gear 12 to a sixth gear 16. The second gear 12 that meshes with the first gear 11 and the third gear (pinion) 13 are integrally formed, and are rotatably supported by a fixed shaft 18 erected in the lower housing 2B. The The fourth gear 14 meshing with the third gear 13 and the fifth gear (pinion) 15 are integrally formed, and the shaft is rotatably supported by a fixed shaft 19 standing in the lower housing 2B. Be supported. Further, a sixth gear (pinion) 16 that meshes with the fifth gear 15 is rotatably supported by a fixed shaft 20 provided upright in the lower housing 2B. By this gear train 4, the rotational speed of the output shaft 3 b of the motor 3 is greatly reduced and transmitted to the sixth gear 16.

  As shown in FIG. 1A, the sixth gear 16 has a detection magnet 8 at a position facing the magnetic sensor 7 as an example of a position detection sensor disposed on the pattern surface 6 a of the printed circuit board 6. Inserted. Using the detection magnet 8 and the magnetic sensor 7, the rotation reference position of the sixth gear 16 is detected. Incidentally, the rotation of the sixth gear 16 controls the opening and closing of a valve device (not shown).

  As shown in FIG. 1A, the lead frame 5 is integrally formed with a connection portion 5 a with the connection terminal 3 a of the motor 3 and an external connection terminal 5 b. A plurality of the lead frames 5 are arranged in the upper housing 2A in a state where a plurality of the lead frames 5 are juxtaposed in a direction perpendicular to the paper surface of FIG. Each lead frame 5 is inserted into a recess 2a (see FIG. 2 for details) of the upper housing 2A, and is sandwiched between the printed circuit board 6 and the upper housing 2A, and the external connection terminal 5b is inserted into the upper housing 2A. It is inserted from the hole 2b (refer to FIG. 2 for details) and fixed so as to protrude from the upper housing 2A.

  The printed circuit board 6 has a pattern surface 6a and a fixed surface 6b, and a surface mount type magnetic sensor 7 is disposed on the pattern surface 6a. On the other hand, the lead frame 5 comes into contact with the fixed surface 6b opposite to the pattern surface 6a, and the lead frame 5 is held between the fixed surface 6b and the upper housing 2A. The fixing surface 6b is used only for fixing the lead frame 5, and is not electrically connected to the lead frame 5.

  As described above, in the present embodiment, the connection terminal 3a of the motor 3 housed in the upper housing 2A is connected to the lead frame 5 integrally formed with the external connection terminal 5b, and the lead frame 5 is connected to the printed circuit board 6. Is fixed to the upper housing 2A, and the external connection terminal 5b protrudes from the upper housing 2A, so that the connection terminal 3a of the motor 3 and the external connection terminal 5b are electrically connected by one lead frame 5. can do. Further, it is possible to minimize the possibility of poor connection between the connection terminal 3a of the motor 3 and the external connection terminal 5b. The external connection terminal 5b is inserted from the terminal insertion hole 2b of the upper housing 2A. Therefore, the external connection terminal 5b can be easily positioned.

  Next, a method for connecting electrical components according to the present invention will be described by taking as an example a case where the method is applied to the motor drive device shown in FIGS.

  A copper plate material is prepared, and a shape as shown in FIG. This member integrally includes five connection portions 5a in which holes or notches are formed, five external connection terminals 5b, a connection portion 5c positioned at the lower end of the external connection terminals 5b, and five connection portions 5c. And a connecting member 5d to be connected. And the two parts of a BB line and CC line are valley-folded, and the member 50 for wiring shown to Fig.3 (a)-(c) is comprised. Thus, the wiring member 50 is formed in a U shape in which the five lead frames 5 are integrally connected by the connecting member 5d via the connecting portion 5c.

  Next, as shown in FIG. 3A, the connection terminal 3a of the motor 3 and the connection part 5a are inserted in a hole or the like drilled in the connection part 5a of the wiring member 50. Are electrically connected with solder. As described above, since the five lead frames 5 are integrally connected by the connecting member 5d via the connecting portion 5c, the connecting terminal 3a of the motor 3 and the connecting portion 5a can be soldered. It is not necessary to separately connect the lead frames 5 to the connection terminals 3a of the motor 3 one by one, and the connection work can be greatly reduced.

  After all the five lead frames 5 are connected to the connection terminals 3a of the motor 3, the connecting portions 5c of the five lead frames 5 are cut, and each lead frame 5 is brought into an electrically independent state.

  Next, in a state where the five lead frames 5 are connected to the motor 3, the motor 3 is housed in the motor housing portion 2c formed in the upper housing 2A shown in FIG. 2, while the external connection terminals 5b of each lead frame 5 are accommodated. Are inserted into the terminal insertion holes 2b one by one and protrude from the housing 2, and the lead frames 5 are inserted into the respective recesses 2a one by one.

  Next, as shown in FIG. 4, the printed circuit board 6 on which the magnetic sensor 7 is mounted is fixed to the fixed surface 6b on the opposite side of the pattern surface 6a to which the magnetic sensor 7 of the printed circuit board 6 is connected (FIG. 1A). The lead frame 5 is fixed to the upper housing 2A by being fixed to the upper housing 2A so as to be in contact with the lead frame 5.

  Finally, as shown in FIG. 1, the gear train 4 is arranged in the lower housing 2B, and the upper housing 2A and the lower housing 2B are integrated to complete the assembly of the motor drive device 1.

  As described above, in the present embodiment, the wiring member 50 in which the plurality of lead frames 5 are integrally continuous is fixed to the upper housing 2A, and the connection portions 5a of the plurality of lead frames 5 and the motor 3 are connected. All the lead frames 5 can be connected to the motor 3 simply by connecting the connection terminals 3a, and after the wiring member 50 is connected to the motor 3, the connecting member 5d of the lead frame 5 is cut. Thus, a plurality of lead frames 5 can be easily connected to the motor 3 without requiring a positioning step of the lead frame 5 or the like.

  In the present embodiment, the case where the electrical component connection structure and connection method according to the present invention are applied to a motor drive device has been described as an example. However, electrical components other than the motor (for example, resistors and capacitors) are used. It can also be applied to the connection structure.

  Further, in the present embodiment, the recess 2a is formed in the upper housing 2A and the lead frame 5 is inserted, but the recess is formed in the fixed surface 6b of the printed circuit board 6, and the lead frame 5 is inserted in the recess to be printed. The lead frame 5 may be sandwiched and fixed by fixing the substrate 6 to the upper housing 2A.

  Further, instead of fixing the lead frame 5 with the printed circuit board 6, the lead frame 5 may be fixed using a separate insulating plate or the like, and the lead frame 5 is fitted into the recess 2a of the upper housing 2A. Then, you may mold with resin with high hardness, such as an epoxy resin.

It is a figure which shows the motor drive device using the connection structure of the electrical component concerning this invention, Comprising: (a) is sectional drawing (AA sectional view of (b), However, lower housing is shown in figure), (b) FIG. 6 is a bottom view showing a state in which the lower housing is removed. It is a bottom view which shows the upper housing of the motor drive device of FIG. It is a figure which shows the member for wiring used for the assembly of the motor drive device of FIG. 1, Comprising: (a) is a front view which shows the state connected to the motor, (b) is a bottom view, (c) is a side view, (d ) Is a development view. FIG. 3 is a bottom view showing a state where a motor, a lead frame and the like are mounted on the upper housing shown in FIG. 2. It is a schematic sectional drawing which shows the vicinity of the external connection terminal in the conventional motor drive device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor drive device 2 Housing 2A Upper housing 2B Lower housing 2a Recess 2b Terminal insertion hole 2c Motor storage part 3 Motor 3a Connection terminal 3b Output shaft 4 Gear train 5 Lead frame 5a Connection part 5b External connection terminal 5c Connection part 5d Connection member 6 Printed circuit board 7 Magnetic sensor 8 Detection magnet 11 First gear 12 Second gear 13 Third gear 14 Fourth gear 15 Fifth gear 16 Sixth gears 18 to 20 Fixed shaft 50 Wiring member

Claims (6)

A housing, a plurality of external connection terminals projecting from the housing, and an electrical component housed in the housing and having a plurality of connection terminals, wherein the plurality of external connection terminals are respectively connected to the connection terminals of the electrical component. It is a connection structure of electrical parts that are electrically connected,
A plurality of lead frames in which the connection portion with the connection terminal of the electrical component and the external connection terminal are integrally formed,
Each of the plurality of lead frames is fixed to the housing in a state where the connection portion is connected to a connection terminal of the electrical component and the external connection terminal protrudes from a terminal insertion hole formed in the housing. Electrical component connection structure characterized by the above.   A plurality of recesses are provided in the housing, and each of the plurality of lead frames is fitted into each of the plurality of recesses, and a fixing member that fixes the plurality of lead frames between the housings is provided. The electronic component connection structure according to claim 1.   The electrical component connection structure according to claim 2, wherein the fixing member is a printed circuit board on which a component for controlling the electrical component is mounted. A housing, a plurality of external connection terminals projecting from the housing, and an electrical component housed in the housing and having a plurality of connection terminals, wherein the plurality of external connection terminals are respectively connected to the connection terminals of the electrical component. A method for connecting electrical components that are electrically connected,
Preparing a wiring member formed by integrally connecting a plurality of lead frames integrally formed with a connection portion with the connection terminal of the electrical component and the external connection terminal;
Connecting each of the connection portions of the plurality of lead frames to the connection terminal of the electrical component;
Cutting each of the connecting portions of the plurality of lead frames constituting the wiring member;
The electrical component to which the plurality of lead frames are connected is housed in the housing, and external connection terminals of the plurality of lead frames are respectively inserted into terminal insertion holes formed in the housing, from the terminal insertion holes. Projecting each of the plurality of lead frames;
And a step of fixing the plurality of lead frames to the housing.   In the step of fixing the plurality of lead frames to the housing, a plurality of recesses are provided in the housing, and each of the plurality of lead frames is fitted into each of the plurality of recesses, and the plurality of lead frames are attached to the housing. 5. The method of connecting electrical parts according to claim 4, wherein a fixing member is used that is held between and fixed.   6. The electrical component connecting method according to claim 5, wherein the fixing member is a printed circuit board on which a component for controlling the electrical component is mounted.

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