JP3343669B2 - Flyback transformer fixed structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flyback transformer (hereinafter referred to as "FBT") fixing structure. Specifically, the FBT used for the television receiver is
It relates to a structure for fixing to a cabinet.

[0002]

2. Description of the Related Art FIG. 3 is a schematic explanatory view of a conventional FBT fixing structure. The FBT 100 (FlyBack Trans) is used to supply a high voltage to a cathode ray tube of a television receiver, and is relatively heavy.
In addition to fixing the wiring board 400 on which the FBT 100 is mounted to the cabinet 300 inside the cabinet 300, the FBT 100 itself
00 was fixed.

The FBT 100 has a substantially cylindrical FBT fixing portion 120 for fixing to a cabinet 300,
It is provided to protrude from the FBT main body 110. The FBT fixing part 120 is provided with a screw hole 121 in the axial direction, and a female screw is cut in the screw hole 121. FBT
100 is a tip surface 120A of the FBT fixing portion 120
But projecting beyond the end of the wiring board 400,
It is mounted on the wiring board 400.

On the other hand, the FBT fixing part 1 of the cabinet 300
In a position corresponding to the position of the screw hole 121 of the opening 20, an opening 3 having a size enough to allow the fixing screw 200 to be inserted exactly.
Ten have been established.

[0005] Wiring board 400 on which FBT 100 is mounted
Is installed at a predetermined position in the cabinet 300, and the fixing screw 200 inserted from the opening 310 of the cabinet 300 is inserted into the screw hole 12 of the FBT fixing part 120.
1 and screwed until the distal end surface 120 </ b> A of the FBT fixing part 120 comes into close contact with the cabinet 300.

[Problems to be solved by the invention]

However, with such a fixing structure, since the FBT fixing portion 120 and the cabinet 300 are in close contact with each other, when a drop impact or the like is applied to the television receiver, an excessive load is applied to the FBT 100, and the FBT 100
There is a problem that the wiring board 400 on which is mounted is damaged.

Further, the size of the opening 310 into which the fixing screw 200 is inserted is almost the same as the thickness of the fixing screw 200, and there is almost no play between the fixing screw 200 and the cabinet 300. Is applied directly to the fixing screw 200, and if the impact is strong, the cabinet 300 itself may be damaged.

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and an object of the present invention is to prevent damage to a wiring board due to a drop impact or the like.

[0009]

SUMMARY OF THE INVENTION A flyback transformer fixing structure according to the present invention includes a flyback transformer having a flyback transformer main body and a flyback transformer fixing portion having a screw hole, which is screwed to a cabinet by fixing screws. The fixed flyback transformer fixing structure, wherein the fixing screw has at least a head, a body portion that is thicker than a screw hole of the flyback transformer fixing portion, and is longer than a thickness dimension of the cabinet; A screw portion to be screwed into the screw hole of the back transformer fixing portion,
The small body portion is inserted into an opening provided in the cabinet with a play such that an impact applied to the cabinet is not directly applied to the small body portion, and a tip end surface of the small body portion is fixed to the flyback transformer fixing portion. It is characterized in that it is screwed by abutting on the tip end surface.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment F of the present invention.
FIG. 2 is an explanatory view of a BT fixing structure, and FIG. 2 is a drawing of a fixing screw 200 used to fix the FBT 100. FIG. 2A is a schematic side view, and FIG. .

The FBT 100 has the same structure as that of the conventional example.
It is provided to protrude from the T body 110. The FBT fixing part 120 is provided with a screw hole 121 in the axial direction thereof, and a female screw is formed on an inner surface of the screw hole 121. FBT1
00 indicates that the tip surface 120A of the FBT fixing portion 120 is
It is mounted on the wiring board 400 so as to protrude from the end face of the wiring board 400.

The fixing screw 200 used in the present invention is shown in FIG.
As shown in the figure, the head 210, the washer 220, and the trunk 230
And these are integrated. The head 210 has a recess (not shown) for inserting the tip of the driver, and can be rotated by the driver.

The washer 220 is formed to be larger than the head 210 and, as described later, the cabinet 3
An opening that is larger than the size of the opening 310 provided at 00 is used. Therefore, the washer portion 220 need only be such that the fixing screw 200 does not pass through the opening 310, and the washer portion 220 does not necessarily need to be formed integrally, and when screwing, the washer is used as a separate component. Is also good.

The body 230 is a male threaded thread 2
32, and a cylindrical body 231 that is thicker than the screw part 232. The small body 231 is located closer to the head 210 than the screw 232. That is, the same part 23
The base end side of 0 is the small body part 231, and the part from the middle part to the front part is the screw part 232. The screw portion 232 has a length that can be screwed sufficiently deep into the FBT fixing portion 120.

The thread 231 is not provided with a thread, and the distal end surface 231A of the thread 231 is fixed to the FBT fixing part 1.
20 abuts against the distal end surface 120A of the fixing screw 20.
0 has such a structure that it does not proceed deeper into the FBT fixing portion 120 any more. Therefore, the cylindrical body 231 does not necessarily have to have a uniform thickness, and may be formed in a tapered shape.

The length of the cylindrical body 231 is slightly longer than the thickness of the cabinet 300. Therefore, in a state where the front end surface 231A of the cylindrical body 231 is in contact with the front end surface 120A of the FBT fixing portion 120, the FBT
The distal end surface 120 </ b> A of the fixing portion 120 is not in contact with the cabinet 300.

The cabinet 300 has a fixing screw 20
An opening 310 for inserting a zero is provided. The opening 310 is formed at least in the dimension body 23 of the fixing screw 200.
A fixing screw 2 that is larger than the thickness of 1 and is inserted
A gap G having a relatively large play is formed between 00 and the inner surface of the opening 310. On the other hand, since the inner diameter of the opening 310 is set smaller than the outer diameter of the FBT fixing part 120, the FBT fixing part 120
00 is not inserted into the opening 310.

First, the wiring board 400 on which the FBT 100 is mounted is arranged at a predetermined position in the cabinet 300. Next, the fixing screw 200 is inserted into the opening 310 of the cabinet 300, and the screw portion 232 is further inserted into the screw hole 121 of the FBT fixing portion 120, and the fixing screw 20 is inserted.
The tip surface 231A of the zero-sized body portion 231 and the FBT fixing portion 12
Screw until the front end surface 120A of the “0” comes into close contact.

Thus, the cabinet 10 is screwed.
0, the FBT 100 is fixed to the cabinet 3 by the length of the cylindrical body 231 protruding from the cabinet 300.
A play is provided between 00. Also, the fixing screw 200
Sufficient play is also provided between the inner peripheral surface of the opening 300 of the cabinet 300 and the opening.

For this reason, the impact applied to the television receiver does not directly apply to the fixing screw 200 but the fixing screw 20.
Weakened by play around 0. Further, the distal end surface 120A of the FBT fixing portion 120 is not in contact with the cabinet 300, and the force applied to the FBT 100 is further reduced. Therefore, no excessive force is applied to the wiring board 400, and the wiring board 400 on which the FBT 100 is mounted is not applied.
Can be prevented from being damaged.

[0021]

According to the flyback transformer fixing structure of the present invention, a flyback transformer having a flyback transformer main body and a flyback transformer fixing portion having a screw hole is screwed to a cabinet with fixing screws. A transformer fixing structure, wherein the fixing screw is at least a head, a body portion that is thicker than a screw hole of the flyback transformer fixing portion, and is longer than a thickness dimension of the cabinet, and the flyback transformer fixing portion. A screw portion to be screwed into the screw hole of the above, the small body portion is inserted into an opening provided in the cabinet with a play such that the impact applied to the cabinet is not directly applied to the small body portion, Since the tip surface of the body portion is screwed by contacting the tip surface of the flyback transformer fixing portion, the cabinet Not applied to the applied impact is directly fixing screw Doo, moreover, because of the play also between the flyback transformer fixing portion of the distal end surface and the cabinet, excessive force is to miss the flyback transformer. Therefore, even if a drop impact or the like is applied to the television receiver, the wiring board is not damaged.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an FBT fixing structure according to an embodiment of the present invention.

FIGS. 2A and 2B are drawings of fixing screws used for fixing an FBT, wherein FIG. 2A is a schematic side view and FIG. 2B is a schematic rear view.

FIG. 3 is an explanatory view of a conventional FBT fixing structure.

[Explanation of symbols]

 Reference Signs List 100 Flyback transformer (FBT) 120 FBT transformer fixing part 121 Screw hole 120A Tip face of FTB transformer fixing part 200 Fixing screw 230 Body 231 Dimensional body 231A Dimensional tip of face 232 Threaded part 300 Cabinet 310 Inserting fixing screw Opening to let

Claims (1)

(57) [Claims] 1. A flyback transformer fixing structure in which a flyback transformer having a flyback transformer main body and a flyback transformer fixing portion having a screw hole is screwed to a cabinet with a fixing screw. The screw has at least a head, a thicker body than the screw hole of the flyback transformer fixing part, and a longer body than the thickness dimension of the cabinet, and a screw part screwed into the screw hole of the flyback transformer fixing part. Wherein the hollow body is inserted into an opening provided in the cabinet with a play such that an impact applied to the cabinet is not directly applied to the hollow body, and the front end surface of the hollow body is flybacked. A flyback transformer fixing structure characterized in that it is screwed in contact with the tip surface of the transformer fixing part.