JPH06124837A - Holding structure for flyback transformer - Google Patents

Abstract

PURPOSE:To perfectly and surely holds a flyback transformer on a printed board assigned in an electronic equipment by holding a boss, projecting from the flyback transformer, with a flanged screw through a through hole provided on a cabinet. CONSTITUTION:A flyback transformer 1 has a boss 4 formed integrally with a main body. A printed board 2 is assigned. A cabinet 3 is provide with a through hole 6 which is slightly larger than the boss 4 in diameter. In a state in which printed board 2 is built in the cabinet, the tip of the boss 4 is so assigned as it projects out of the cabinet through hole 6, then tightened with a flanged screw 5. With this, since the flyback transformer is held by screwing with a single screw, even at drop or vibration-shock applied, no large force is applied to the printed board, so cracking is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding structure for a flyback transformer which is a heavy component placed on a printed circuit board of a television receiver or the like.

[0002]

2. Description of the Related Art In a conventional flyback transformer holding structure, as described in Japanese Utility Model Laid-Open No. 62-51791, a separate piece part for exclusive use is added to support the flyback transformer so that the printed circuit board is protected from falling, vibration and impact. It has a protective structure.

Further, in the previous invention, a flyback is used in which another piece component is attached and fixed to the cabinet.

[0004]

In the prior art described above, it was necessary to prepare a separate piece part dedicated to the shape of the flyback transformer, which is a heavy part of the printed circuit board. In addition, it is necessary to turn the printed circuit board upside down and attach another piece component after the component soldering work is completed, which is a factor of poor workability and an increase in man-hours.

In the case where the flyback transformer is fixed to the cabinet through another piece, an error occurs in the mounting dimension and stress is generated in the soldering part of the flyback transformer, and the set is used for a long time. However, there was a risk of peeling of the solder and causing discharge, ignition, etc.

The object of the present invention is to assemble a flyback transformer on a printed circuit board with good assembling property, and even when it is dropped or vibrated in the set state, the printed circuit board is cracked without applying a great force. Prevent. Another object is to secure soldering reliability for a long period in the printed board soldering section.

[0007]

In order to achieve the above object, the flyback transformer has a boss integrally formed from the main body, and the cabinet has a through hole slightly larger than the boss diameter. . Then, when the printed circuit board is incorporated into the cabinet, the tip of the boss of the flyback transformer projects from the through hole of the cabinet. Further, it is achieved by tightening a screw with a flange larger than the shape of the cabinet through hole on the protruding boss.

[0008]

The main body of the flyback transformer on the printed circuit board has a boss projecting integrally. Further, a through hole that is slightly larger than the boss diameter is provided in the cabinet in which the printed circuit board is placed. After placing the printed circuit board in the cabinet, tighten the screw with flange to the boss protruding from the cabinet through hole. Therefore, the flyback transformer is fixed with a clearance between the boss and the cabinet through hole or a clearance of the boss portion protruding from the cabinet. As a result, it is possible to prevent cracking without a great force being applied to the printed circuit board even when a drop or vibration impact is applied in the set state by simply tightening one screw. Further, since there is a clearance in fixing the flyback transformer to the cabinet, it is possible to secure soldering reliability for a long time in the printed circuit board soldering portion even if some mounting error occurs in mounting. .

[0009]

EXAMPLES Examples of the present invention will be described below with reference to FIGS.
Will be explained.

FIG. 1 is a vertical sectional view of a flyback transformer section showing an embodiment of the present invention. Flyback transformer 1
Has a boss 4 formed integrally with the main body. The cabinet 3 in which the printed circuit board 2 is placed has a through hole 6 slightly larger than the diameter of the boss 4. In a set state in which the printed circuit board 2 is assembled in a cabinet, the tip of the boss 4 is arranged so as to project to the outside from the cabinet through hole 6, and then the boss 4 is screwed with a flanged screw 5.

According to the present embodiment, holding the flyback transformer requires a simple tightening operation of one screw, and a great force is applied to the printed circuit board even when it is dropped or vibrated and shocked in the set state. However, cracking can be prevented. In addition, since there is a clearance for fixing the flyback transformer to the cabinet, it is possible to secure soldering reliability for a long time at the printed circuit board soldering part even if some mounting error occurs in mounting. Becomes

2 and 3 show a conventional embodiment.

In the case of FIG. 2, a structure is adopted in which the weight of the flyback transformer 1 is supported by another piece receiving member 7. Therefore, after the flyback transformer 1 is soldered through the solder bath, the printed circuit board 2 is turned upside down and the other piece receiver 7
Must be tightened with the screw 5a, which increases the number of steps.

In the case of FIG. 3, another holding tool 8 is attached to the screw 5b.
The structure is to be inserted into the protrusion 9 of the mounting cabinet 3. In this case, in the set state, effective holding can be obtained in the up / down, left / right, and rear directions, but complete holding cannot be obtained because there is no pressing on the front side. In addition, since there is no mounting margin for holding the flyback transformer 1, when an assembly error or an installation error occurs, stress is applied to the soldered portion of the printed circuit board 2 and solder peeling may occur after long-term use. It may occur, causing a fire or the like.

[0015]

As described above, according to the present invention, in the holding structure of the flyback transformer, the boss protruding from the flyback transformer is held by the screw with the flange through the through hole provided in the cabinet. Therefore, it is possible to prevent cracking without a great force being applied to the printed circuit board even when a drop or vibration impact is applied in the set state by simply tightening one screw. or,
Since there is a clearance in fixing the flyback transformer to the cabinet, the soldering reliability can be ensured for a long period of time at the printed circuit board soldering portion even if some mounting error occurs in mounting.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a flyback transformer portion in a set state showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a flyback transformer portion in a set state showing a conventional embodiment.

FIG. 3 is a vertical sectional view of a flyback transformer portion in a set state showing a conventional embodiment.

[Explanation of symbols]

 1 ... Flyback transformer, 2 ... Printed circuit board, 3 ... Cabinet, 4 ... Boss integrally protruding from the flyback transformer, 5 ... Flange screw, 5a ... Screw, 5b ... Screw, 6 ... Cabinet through hole, 7 ... Receiving Tool, 8 ... Retainer, 9 ... Protrusion.

Claims (1)

[Claims] 1. A flyback transformer arranged on a printed circuit board of an electronic device such as a television receiver and a cabinet structure for arranging the printed circuit board, wherein the flyback transformer has a boss integrally projected from a main body.
In addition, the cabinet has a through hole that is slightly larger than the boss of the flyback transformer, and when the printed circuit board is placed in the cabinet, the boss of the flyback transformer is positioned so as to protrude from the cabinet through hole. A flyback transformer holding structure characterized by tightening and holding a screw having a flange larger than the through hole diameter of the cabinet.