JPH06806Y2 - Transformer mounting structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer mounting structure, and more particularly to a transformer mounting structure configured to mount a bottom bracket of a transformer directly on a substrate.

2. Description of the Related Art A conventional transformer mounting structure is shown in FIG. In FIG. 4, in this structure, the bottom bracket 2 provided on the bottom of the transformer 1 is directly fixed on the pilint substrate 3, and both sides of the bottom of the transformer 1 are soldered to the pilint substrate 3 for input / output. Connection pins 4, 4'for A pair of spacers 6 and 6 are interposed between the substrate 3 and the chassis 5 so as to face the bottom brackets 2 and 2 extending on both sides of the transformer 1 (one spacer 6 in FIG. 4). Only shown). The mounting bolt 7 penetrates the bottom bracket 2 and the spacer 6 and is screwed into the female screw portion 5 a of the chassis 5. In the structure shown in FIG. 3, since the connection terminal 4 can be directly soldered to the circuit on the board 3, the circuit of the board 3 and each connection terminal 4 of the transformer 1 are connected to lead wires as compared with the case where the transformer is fixed to a chassis or the like. No need to connect with, and roughing work can be done easily.

Problem devised to be Solved However, the width l ₂ of the bottom bracket 2 is shorter than the distance 1 ₂ between the connection pins 4, 4 'protruding from both sides of the transformer 1 in the conventional transformer mounting structure. Therefore, if the electronic device using the transformer mounting structure is accidentally dropped and the electronic device is shocked, the following problems occur. That is, the transformer 1 which is relatively heavy
Is fixed directly on the substrate 3, the transformer 1 will be narrowed by the bottom bracket 2 when an external impact is applied.
It swings in the direction of arrow X with the fulcrum as the fulcrum. At this time, a force for displacing the connecting pins 4, 4 ′ located outside the both ends of the bottom bracket 2 in the upward and downward directions acts, so that the soldered portion 8 is easily peeled off and the transformer 1 swings largely. There arises a problem that the connection pin 4 comes off from the soldered portion 8. Although the above problem can be solved by increasing the number of bolts 7 for fixing the bottom bracket 2 to the substrate 3,
In that case, a new problem arises that the number of steps of the assembling work increases and the work efficiency decreases.

Then, this invention aims at providing the transformer mounting structure which solved the said subject.

Means for Solving the Problems (1) The present invention is a transformer in which a bottom bracket provided at the bottom of a transformer is directly fixed to a board, and connecting pins protruding from both sides of the bottom of the transformer are soldered to the board. In the mounting structure, the bottom bracket extends so that both ends of the bottom bracket that abut on the board are located outside the connection pins.

(2) The present invention is a transformer mounting structure in which a spacer for supporting the substrate is provided between the chassis and the substrate to which the bottom bracket extending from both sides of the transformer is fixed, and the spacer is extended between the bottom brackets. The spacer has a pair of support portions that support the board at positions facing the bottom brackets on both sides of the transformer, and the connection pin ends of the transformer soldered by penetrating the board between the pair of support portions. And a stopper portion that comes into contact with the connection pin when the transformer swings.

Operation (1) By extending the bottom bracket of the transformer to the outside of the connection pin, the connection pin is prevented from being displaced relative to the board even if the transformer swings due to an external impact. To prevent the solder from peeling and prevent the connection pin from coming out of the solder connection portion.

(2) When the transformer on the board swings, the connection pin soldered to the board contacts the stopper portion provided on the spacer to prevent the transformer from swinging any further.

Embodiment An embodiment of a transformer mounting structure according to the present invention is shown in FIGS. 1 and 2. In both figures, the same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

A plurality of connecting pins 4 and 4'project on both sides of the bottom of the transformer 1 in the arrow X direction, and bottom brackets 9 and 9'are provided on both sides of the transformer 1 in the arrow Y direction. The bottom bracket 9 is a support portion 9 protruding downward from the side surface 1a of the transformer 1.
a and an abutting portion 9 bent in an L shape at the lower end of the supporting portion 9a
b. The supporting portion 9a is formed so as to become wider as it goes downward, and the abutting portion 9b that abuts on the substrate 3 extends so that both ends thereof are located outside the connection pins 4.

That is, the width dimension l ₃ of the contact portion 9b in the direction of the arrow X is larger than l ₂ between the connecting pins 4 and 4 ', and is substantially the same as the width dimension of the transformer 1.

Here, for example, an external impact force in the direction of arrow X acts,
In the figure, it is assumed that the transformer 1 swings in the direction of arrow A.
In this case, the contact portion 9 of the wide bottom bracket 9 is
Since b is in contact with the substrate 3, the left end 9c of the contact portion 9b in FIG. 1 pushes down the substrate 3 at a position outside the connection pin 4. Therefore, the connection pin 4 on the left side in FIG. 1 and the soldered portion 8 of the substrate 3 are pressed substantially in the same direction, and no relative displacement occurs between them.

That is, since the bottom bracket 9 is a rigid body, even if the board 3 has elasticity, the board 3 with which the contact portion 9b abuts can maintain a flat state regardless of the swing of the transformer 1.
Therefore, even if the transformer 1 swings in the direction of the arrow X due to an external impact force, the soldered portion 8 is prevented from peeling off, or the connection pins 4 and 4 ′ are prevented from coming off the soldered portion 8.

Even when the transformer 1 swings in the direction of arrow B, the peeling of the soldered portion is prevented by the same action as above.

Further, even if a force is applied to the transformer 1 in the direction of the arrow Y, the abutting portions 9b of the pair of bottom brackets 9 are bent in the same direction outside the complicated connecting pin 4, so that the transformer 1 is almost in the direction of the arrow Y. It does not swing in the direction and peeling of the soldered portion 8 does not occur.

Further, a spacer 10 is interposed between the substrate 3 and the chassis 5, and the spacer 10 is made of an insulating material so as to extend in the arrow Y direction as shown in FIGS. 3 (A) to (C). It is integrally molded.

The supervisor 10 has a pair of support portions 10a and 10b (bolt insertion holes 10a ₁ and 10a ₁ and 10b) protruding on the upper surface so as to face the bottom brackets 9 and 9 extending from both sides of the transformer 1.
b ₁ is perforated). In addition, a pair of supporting portions 1
Stoppers 10c and 10d extending in the direction of the arrow Y project between 0a and 10b. The stopper 10
The projecting height h ₁ of c and 10d is lower than the projecting height h ₂ of the supporting portions 10a and 10b, and is a height at which the connecting pins 4 and 4'of the transformer 1 do not abut, as shown in FIG. Therefore, the plurality of connecting pins 4, which protrude downward from the bottom of the transformer 1,
4'is separated by a slight gap (for example, about 0.5 to 1 mm) closely facing the stoppers 10c and 10d.

Further, a positioning pin 10e for positioning the mounting position on the chassis 5 and a recess 10g having a hole 10f for screwing the chassis 5 are provided on the bottom surface side of the spacer 10. Then, cutouts 10h, 1 for contacting the mounting portions 5b to 5d of the chassis 5 are formed on the peripheral edge of the bottom portion of the spacer 10.
0i is recessed.

In FIG. 2, the chassis 5 has mounting portions 5b to 5d on which the spacer 10 is mounted cut and raised on the upper surface thereof.
Screw hole _{5b 1 ~5d} 1 is bored in each mounting portion 5b to 5d. The peripheral edge of the spacer 10 is placed on the chassis 5, the tubular portions 10a ₂ and 10b _{2 of the} support portions 10a and 10b are placed on the placing portions 5b to 5d, and the positioning pin 10e is attached. It is inserted into the positioning hole 5e of the chassis 5.

Therefore, at the time of assembling steps screwing the bolt 11 by placing the spacer 10 to the chassis 5 to the screw holes 5c ₁ of the portion 5c mounting than the mounting hole 10f of the spacer 10 as described above. The spacer 10 is now fixed to the chassis 5.

Then, the bolt 7 is the support portions 10 of the mounting hole 9b ₁ the spacer 10 which is formed in the contact portion 9b of the bottom bracket 9
The holes 10a ₁ and 10b ₁ of a and 10b are inserted and screwed into the screw holes 5b ₁ and 5d ₁ of the chassis 5. As a result, the board 3 is fixed to the chassis 5 via the spacer 10, and at the same time, the bottom brackets 9a and 9b of the transformer 1 are also fixed to the board 3 by tightening the bolts 7.

At this time, the connection pins 4, 4 ′ of the transformer 1 soldered to the substrate 3 closely face the stopper portions 10 c, 10 d of the spacer 10. Therefore, as described above, when the transformer 1 swings in the directions of arrows A and B due to the external force, the connecting pins 4 and 4'abut on the stopper portions 10c and 10d of the spacer 10. As a result, the transformer 1 is prevented from swinging further, and at the same time, the degree of bending of the substrate 3 is suppressed to a small level. Therefore, peeling of the soldered portion 8 due to the swing of the transformer 1 also causes the stopper portions 10c, 10
This is prevented by d.

Effect of the Invention As described above, in the transformer mounting structure according to the present invention, by extending the bottom bracket so that both ends of the bottom bracket are located outside the connection pins, an external impact force acts and the transformer is installed. It is possible to prevent the solder connection portion from being peeled off even when the swing operation is performed, and it is possible to prevent the connection pin from coming off from the solder connection portion. Therefore, the transformer can be directly fixed on the substrate without increasing the number of bolts for fixing the bottom bracket to the substrate, so that the assembling work does not take time and the work efficiency can be reduced and the solder peeling or the like can be prevented.

Further, according to claim (2), even if the transformer whose connection pins are directly soldered to the board swings due to external force or the like, the end portions of the connection pins are stoppers provided on the spacer between the board and the chassis. It has a feature that it can be prevented from coming into contact with the portion and swinging further, and as a result, the bending of the substrate can be suppressed and peeling of the soldered portion of the connection pin can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a transformer mounting structure according to the present invention, FIG. 2 is a front view thereof, and FIGS. 3 (A) to (C) are plan views of a spacer, respectively, and a vertical section along line IIIB-IIIB. A plan view, a bottom view, and FIG. 4 are side views for explaining a conventional transformer mounting structure. 1 ... Transformer, 3 ... Printed circuit board, 4, 4 '... Connection pin, 5 ... Chassis, 5a ... Female thread part, 7 ... Bolt, 8 ...
Soldered portion, 9 ... Bottom bracket, 9a ... Support portion, 9b
... abutting part, 10 ... spacer, 10a, 10b ... supporting part,
10c, 10d ... Stopper section.

Claims (2)

[Scope of utility model registration request] 1. A transformer mounting structure in which a bottom bracket provided on the bottom of a transformer is directly fixed to a board, and connecting pins protruding from both sides of the bottom of the transformer are soldered to the board, which abuts on the board. A transformer mounting structure in which the bottom bracket extends so that both ends of the bottom bracket are located outside the connection pins. 2. A transformer mounting structure comprising a spacer for supporting the substrate between a substrate and a chassis to which a bottom bracket extending from both sides of the transformer is fixed, wherein the spacer extends between the bottom brackets. The spacer is provided with a pair of support portions for supporting the substrate at positions facing the bottom brackets on both sides of the transformer, and the transformer soldered by penetrating the substrate between the pair of support portions. A transformer mounting structure comprising a stopper portion that closely faces the end portion of the connection pin and comes into contact with the connection pin when the transformer swings.