JPH0543512U - Connection structure of terminals and electrodes of winding parts - Google Patents

Abstract

(57) [Abstract] [Purpose] The structure is such that the end 22 of the wire 20 can be easily positioned with respect to the electrode 12 and connected securely. [Structure] A side surface of a circuit board (10) is provided with a notch (11) having a semicircular cross section, and a conductor is attached to at least one surface of the circuit board (10) facing the notch (11) to the inside of the notch (11). The electrode 12 is formed, and the end 22 of the winding component 20 mounted on the circuit board 10 is inserted into the notch 11 and welded to the electrode 12 in the notch 11. [Effect] Workability is improved, and automation of the welding process is facilitated. Bonding strength is increased and connection reliability is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure between a terminal of a winding component such as a coil and a transformer fixed on a circuit board and an electrode provided on the circuit board.

[0002]

[Prior art and its problems]

 Conventionally, as shown in FIG. 1, the terminal 1 of the coil is connected and fixed to the electrode 3 provided on the end surface of the substrate 2 by means such as soldering or resistance welding, but the surface of the electrode 3 is flat. In the case of a small electronic component in which the position of the coil terminal 1 is not fixed and the electrodes 3 are close to each other, there is a drawback that workability is particularly poor. In addition, a terminal is fixed to an electrode and a coil end is wound around this terminal for soldering, but there is a problem that the winding work is complicated and it is difficult to automate the process.

[0003]

[The purpose of the device]

 It is an object of the present invention to provide a connection structure between a terminal of a winding component and an electrode, which has good workability and can be surely connected.

[0004]

[Means for Solving the Problems]

 According to the present invention, a plurality of notches each having a substantially semicircular cross section are provided on a side surface of a circuit board, and a conductor is covered from at least one surface of the circuit board facing each notch to the inside of the notch. It is characterized in that it is attached to form an electrode, the end of the winding component mounted on the circuit board is inserted into the notch, and is welded to the electrode in the notch.

[0005]

【Example】

 FIG. 2 shows an embodiment of an electronic component to which the terminal and electrode connection structure of the winding component according to the present invention is applied. As shown in an enlarged view in FIG. 3, a notch 11 having a semicircular cross section is provided on two opposite side surfaces of the circuit board 10, and conductors are attached from the inside to the part from the inside to the front and back of the circuit board 10. The electrode 12 is formed. Such a circuit board 10 can be easily obtained by cutting the center of the through hole 16 from the mother board 15 and cutting out a plurality of circuit boards 10 as shown in FIG. The dashed line in FIG. 4 represents the cut portion. As another method of providing the electrode 12, a molded metal plate may be fitted on the side surface of the circuit board 10 and adhered thereto, or a conductor may be provided by printing or baking.

A transformer 20 in which a plurality of flat wire materials are spirally wound around a core 21 is fixed on the circuit board 10, and a terminal 22 of the transformer 20 is inserted into the cutout 11 and the cutout 11 is formed. It is welded to the electrode 12 inside. Although not shown, a conductor pattern is formed on the lower surface of the circuit board 10, and the electrode 12 is electrically connected to this conductor pattern. By using the conductor pattern as an electrode for external connection, it can be used as it is as an imposition type transformer. In addition, surface-mounting circuit elements such as semiconductors, resistors, and capacitors are attached to the conductor pattern on the lower surface of the circuit board 10, and terminals are fixed to the electrodes 12 to form a circuit block such as a DC-DC converter. It can also be configured.

To attach the terminal 22 to the electrode 12 of the circuit board 10, the terminal 22 of the transformer 20 is pulled out through the notch 11 as shown in FIG. 5, and the head 30 of the welding machine is lowered in the notch 11. Then, the terminal 22 may be pressed against the terminal 22 and the terminal 22 may be welded to the electrode 12. Note that, as shown in FIG. 6, the electrode 12 may have a configuration in which a part of the surface side of the circuit board 10 that is not connected to the conductor pattern is removed.

[0008]

[Effect of the device]

 According to the present invention, the end of the wire is welded to the electrode provided in the semicircular cutout portion, so that the end of the wire can be easily positioned on the predetermined electrode. Therefore, workability in the welding process is remarkably improved, and automation of the welding process is facilitated. In addition, since welding is performed on the electrode in the semicircular notch, the joining strength is greatly increased compared to welding on a flat electrode, and the connection reliability is also improved. The circuit board can be easily manufactured by cutting the center of the through hole, so mass productivity is good.

[0009]

[Brief description of drawings]

FIG. 1 is a partial perspective view showing a conventional connection structure.

FIG. 2 is a perspective view showing an embodiment of an electronic component to which the connection structure of the present invention is applied.

FIG. 3 is an enlarged perspective view of a main part of the embodiment.

FIG. 4 is a plan view showing a method for manufacturing a circuit board.

FIG. 5 is an enlarged perspective view of the assembly process.

FIG. 6 is a partial perspective view showing another embodiment of the circuit board.

[Explanation of symbols]

 10 circuit board 11 notch 12 electrode 20 transformer 22 terminal

Claims (2)

[Scope of utility model registration request] 1. A plurality of cutouts having a substantially semicircular cross section is provided on a side surface of a circuit board, and a conductor is attached to at least one surface of the circuit board facing each cutout and extending to the inside of the cutouts. Forming the electrode, and inserting the end of the winding component mounted on the circuit board into the notch and welding it to the electrode in the notch. Connection between the end of the winding component and the electrode Construction. 2. By dividing the through hole into two,
The connection structure between the terminal and the electrode of the winding component according to claim 1, wherein a notch formed with a conductor is formed.