JPH077167U - Electrical component mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the vibration resistance and shock resistance of electrical equipment including heavy electrical components. [Structure] Light electrical components such as film capacitors, ceramic capacitors and resistors are mounted on a printed circuit board by normal soldering, while heavy electrical components such as transformers are fixed to the outer shell of electrical equipment and mechanically restrained. The lead terminals are electrically connected to the flexible circuit board electrically connected to the printed board by soldering. For this reason, even if an electric device is used in an environment with vibration, or if it is dropped and shocked, the printed circuit board undulates and vibrates due to the shock, and soldering parts of other electric parts are There is no risk of electrical connection failure in internal wiring without deterioration or destruction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrical component mounting structure in an electrical device that requires vibration resistance and shock resistance, particularly in an electrical device including a heavy electrical component.

[0002]

[Prior art]

 When an electric device with a built-in structure in which heavy electric parts such as a transformer are mounted on a printed circuit board only by normal soldering is used in an environment with vibration or is dropped and is subjected to shock. However, due to the weight of the heavy electrical components, excessive stress may be applied to the solder joints and the solder joints may deteriorate or break, resulting in poor electrical connection.

As one of the conventional component mounting structures of this kind for solving such a problem, there is one as shown in FIG. That is, a lightweight electric component c such as a film capacitor, a ceramic capacitor, or a resistor is mounted only on a printed circuit board b fixed in an outer shell case a of an electric device by ordinary solder mounting, and a heavy electric component d such as a transformer is mounted. Is mechanically restrained by the fixing screw e and then solder-mounted on a predetermined land on the printed-circuit board b. This prevents excessive stress from being applied to the soldered part and prevents heavy electrical load. This prevents the deterioration of vibration resistance and impact resistance due to the mounting of parts.

Further, in another example, as shown in FIG. 4, a heavy electrical component d is mounted on a printed board b fixed in an outer shell case a together with other lightweight electrical components c only by ordinary soldering. The heavy electrical component d and the other large electrical component g such as an electrolytic capacitor are coated with a resin adhesive h to integrate the two, so that the heavy electrical component d is attached to the printed circuit board b. Mechanical restraint is applied to prevent deterioration of vibration resistance and impact resistance due to heavy electric parts.

[0005]

[Problems to be solved by the device]

 However, in any of the improved examples of such an electric component mounting structure, when the electric device incorporating these mounting structures is used in an environment with vibration, or is dropped and receives an impact. Even if it is possible to protect the soldered part of the heavy electrical component itself, the printed circuit board is undulated by vibration or impact, causing vibration and deterioration or destruction of the soldered part of other electrical components. There is a risk that the electrical connection may be defective.

Referring to FIG. 5, particularly when the other electric component is an electric component i having a long and multi-terminal such as a HIC or another child board, the printed circuit board is soldered by the waving phenomenon. The damage to the club was great.

[0007]

[Means for Solving the Problems]

 While light electrical components such as film capacitors, ceramic capacitors, and resistors are mounted on the printed circuit board by normal soldering, heavy electrical components such as transformers are fixed to the outer shell of electrical equipment and mechanically restrained. Is electrically connected to the flexible circuit board electrically connected to the printed circuit board by soldering.

[0008]

[Action]

 Vibrations and shocks applied to heavy electrical components are applied to the outer shell of electrical equipment and do not affect the soldered parts of other electrical components. Also, since the soldered portion of the lead terminal of the heavy electrical component itself is flexible on the circuit board side, excessive stress is not applied to the soldered portion.

[0009]

【Example】

 FIG. 1 shows a first embodiment of the present invention. In the figure, the printed circuit boards 1 and 2 are fixed to the mounting portion 4 of the outer shell case 3 of the electric device with screws 5, respectively, and light-weight electrical components 6 such as a film capacitor, a ceramic capacitor, and a resistor are mounted by soldering appropriately. To be done. On the other hand, the transformer 7, which is a heavy electric component, is directly fixed to the bottom side of the outer shell 3 of the electric device at the center of the fixing position of the printed boards 1 and 2 with a screw 8. The lead terminals 9 of the transformer 7 are electrically connected by soldering to a flexible circuit board 10 electrically connected between the printed circuit boards 1 and 2.

FIG. 2 shows a second embodiment of the present invention. In the figure, the printed circuit boards 1a and 2a are fixed in two layers with a screw 5a and a spacer 6a to a mounting portion 4a of an outer casing 3a of an electric device, and a light electric component 7a such as a film capacitor, a ceramic capacitor and a resistor is appropriately soldered. It is implemented with attachment.

On the other hand, the transformer 8a, which is a heavy electric component, is directly fixed to the side wall of the outer shell 3a of the electric device with the screw 9a. The lead terminals of the transformer 8a are electrically connected by soldering to the flexible circuit board 10a electrically connected to the printed boards 1a and 2a.

In this embodiment, generally, a heavy-weight electrical component, which is generally large, is separately placed in an outer shell case, and a generally lightweight electrical component is printed in a double layer on a space adjacent to the position where the heavy-electrical component is disposed. Since it is mounted on the board, the overall size of the electrical equipment can be made compact.

[0013]

[Effect of device]

 As described above, this invention mounts the lightweight electric parts on the printed circuit board by soldering, while fixing the heavy electric parts directly to the side of the outer shell 3 of the electric device and the lead terminals thereof to the printed circuit board. Since the electrical connection is made by soldering to the electrically connected flexible circuit board, the vibration will occur even if the electrical equipment containing these mounting structures is used in an environment with vibration or is dropped and shocked. , The printed circuit board does not undulate and vibrate due to shock, which may deteriorate or destroy the soldered parts of other electrical parts.

Further, since the circuit board side is also flexible in the soldering portion of the lead terminal of the heavy electrical component itself, an electric device having excellent vibration resistance and impact resistance without applying excessive stress to the soldering portion. Can be realized.

[0015]

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of an electronic component mounting structure of the present invention.

FIG. 2 is a side sectional view showing a second embodiment of a mounting structure for electronic parts of the present invention.

FIG. 3 is an explanatory diagram of a conventional example.

FIG. 4 is an explanatory diagram of a conventional example.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Printed Circuit Board 2 Printed Circuit Board 3 Outer Shell Case 6 Lightweight Electric Component 7 Heavy Electric Component 9 Lead Terminal 10 Flexible Circuit Board

Claims (1)

[Scope of utility model registration request] 1. A light electrical component such as a film capacitor, a ceramic capacitor and a resistor is mounted on a printed circuit board by ordinary soldering, while a heavy electrical component such as a transformer is fixed to an outer shell of an electric device and mechanically restrained. An electrical component mounting structure in which the lead terminals are electrically connected to the flexible circuit board electrically connected to the printed circuit board by soldering. [0001]