JPH06860Y2 - AC adapter- - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an AC adapter, and more particularly to a fixing device for a PC board to be fixed in the AC adapter.

[Problems to be solved by conventional techniques and devices]

Conventionally, the PC should be fixed in the AC adapter
A hole is made in the board, a projection is further provided on the case, the projection is inserted into the hole of the PC board, and the tip of the projection is crushed with a soldering iron to fix the PC board.

Thus, the conventional means for fixing the PC board has many man-hours,
Moreover, there was no certainty and there was a defect in soldering.

Further, as another means for fixing the PC board, there is also one in which hard pins are implanted in the trans bobbin and the PC board is soldered and fixed thereto. Since the fixing means does not fix the PC board until it is soldered, it hinders the assembly work of each component, or the DC cord and the PC board, and the secondary winding and the PC board. The soldering was not possible by automatic dipping, and they were individually soldered by hand. Therefore, the soldering can be surely performed by the automatic dipping work, and
There are technical problems that must be solved in order to facilitate the assembly work of each part.

[Means for solving problems]

The present invention has been proposed as a solution to the above problems, and a protrusion having a hook-shaped engaging portion at the tip is provided on the flange of the transformer bobbin on the secondary winding side. The fitting hole of the engaging portion is opened in the PC board, and the hole is fitted to the engaging portion of the projection in combination with the elasticity of the projection to fix the PC board, and The surface of the board to be soldered is arranged on the tip side of the protrusion to dip-solder the soldering surface, thereby providing an AC adapter.

[Action]

In this invention, a protrusion having a hook-shaped engaging portion is provided at the tip of the flange on the secondary winding side of the trans bobbin, and a hole for fitting the engaging portion of the protrusion is opened in the PC board. Then, the hole is tightly fitted to the engaging portion together with the elasticity of the protrusion. Thus, the PC board is fixed to the collar of the secondary winding via the protrusion. At this time, since the surface of the PC board to be soldered is arranged on the tip side of the protrusion, the secondary winding and the PC board and the DC cord and the PC board are soldered by means of the automatic dip soldering. Now you can do it easily and quickly. Furthermore, since the PC board is fixed by the protrusions provided on the trans bobbin, stress is not applied to the soldered portion, so that the soldered portion is not destroyed.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the attached drawings. (1) is an AC adapter, (2) is an input terminal,
(3) is the output DC code. (4) is the case body, and (5) is the cover. Thus, the case body (4) is provided with the insertion holes (4a) (4a) for the input terminals (2) (2),
Tsuba (6a) provided on the primary winding (7) side of the trans bobbin (6)
Insert the input terminals (2) and (2) that are connected to the primary winding (7) and are planted in the insertion holes (4a) and (4a) so that they project to the outside, and then insert the AC. It is intended for use.

Further, protrusions (9) and (9) are provided on both sides of the flange (6b) on the secondary winding (8) side of the trans bobbin (6). These protrusions (9) (9) are stepped (9
a) (9a), and the hook-shaped engaging part on the upper surface of this step
(9b) and (9b) are provided. The holes (10) (10) into which the engaging portions (9b) (9b) are just fitted and can be tightly fitted tightly are formed in the PC board (1
They are provided facing each other on 1). Furthermore, this PC board (1
The diode (12) (12), the capacitor (13) (13), and (13a) are provided in 1), and the substrate (11) and the secondary winding are further provided.
It is connected to (8) with a lead wire (L), and DC on the output side
The cord (3) and the substrate (11) are similarly connected by lead wires (L) and (L), and soldered by an automatic dip soldering operation.

Reference numeral (14) in the figure indicates a core.

Since the above-described one embodiment of the present invention has a structure as described above, the protrusions (9) and (9) protruding from the flange (6b) on the secondary winding (8) side of the trans bobbin (6) are connected to the PC. The holes are inserted into the holes (10) (10) opened in the substrate (11). At this time, since the protrusions (9) (9) are stepped, the stepped portions (9a) (9a) are (11) of the PC board.
It contacts the back surface of the and keeps a constant interval. Then, the hook-shaped engaging portion (9b) protruding from the upper surface of the stepped portion (9a) (9a).
(9b) is fitted in the holes (10) and (10). Therefore, in order to strengthen this fitting state, the engaging portion (9b)
(9b) size and the above-mentioned hole where this engaging part (9b) (9b) fits
(10) The size of (10) must be relatively pre-calculated and determined. Thus, when the predetermined and formed engaging portions (9b) (9b) are forcibly fitted into the holes (10), (10), the elasticity of the protrusions (9), (9) is Together with this, the PC board (11) is fixed to the trans bobbin (6) by being firmly fitted. At this time, the soldered surface of the PC board (11) is arranged on the tip side of the protrusions (9) (9). Therefore, automatic dip soldering is easy for each soldered portion on the PC board (11). Moreover, since the PC board (11) is fixed by the projections (9) and (9) of the trans bobbin (6) as described above, stress is not applied to the soldered portion. Further, the PC board (11) can be fixed in a small number of steps and can be automatically assembled, which contributes to cost reduction.

Thus, as another embodiment of the present invention, the protrusion (9)
The number of the protrusions (9) can be appropriately increased, and the shape of the protrusion (9) should not be particularly limited. For example, as shown in FIG. 5, the protrusion (9) is lengthened, and the solder dip surface of the substrate (11) is arranged on the core (14).
It can be prevented from sticking to 4). Therefore, it goes without saying that the holes (10) of the PC board (11) corresponding to the protrusions (9) can be appropriately changed according to the number and shape of the protrusions (9).

In this way, this transformer can be stored in the case body (4) by inserting its input terminals (2) and (2) into the insertion holes (4a) and (4a) of the case body (4) and projecting it outside. Further, pull out the DC cord (3) which is an output terminal to the outside and attach the cover (5) to the cover A
The C adapter is constructed.

[Effect of device]

In this invention, as will be described in detail in the above embodiment, the PC board is provided on the flange on the secondary winding side of the trans bobbin, the engaging portion of the projection having a hook-like engaging portion at the tip end, and the PC. The holes formed in the substrate are fitted to each other to be firmly fixed together with the elasticity of the protrusions. At this time, since the soldered surface of the PC board is arranged on the tip side of the protrusion, the secondary winding and the P
The soldering operation by dipping the C board, the DC code and the PC board becomes extremely easy. Furthermore, since the protrusion can be integrally molded with the trans bobbin, the structure is simple and the fixing operation of the PC board is extremely easy. Further, as described above, since the PC board is fixed by the protrusions, stress is not applied to the solder portion and accidental damage to the soldered portion is prevented, and
Since the assembly of the PC board can be fixed with a low man-hour, automatic assembly is possible, which contributes to cost reduction.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view thereof, FIG. 2 is a vertical side view of the same, FIG. 3 is a rear view when the main body is removed, and FIG. FIG. 5B is a rear view of the PC board, and FIG. 5 is a vertical side view showing another embodiment when the case body and the cover are removed. Symbol Description (6) …… Trans bobbin (6b) …… Secondary winding side collar (8) …… Secondary winding (10) …… Hole (11) …… PC board

Claims (1)

[Scope of utility model registration request] 1. A protrusion having a hook-shaped engaging portion at its tip is provided on the flange of the secondary bobbin side of the trans bobbin, and a fitting hole of the engaging portion of the protrusion is opened in a PC board. In combination with the elasticity of the protrusion, this hole is fitted into the engaging portion of the protrusion to form a PC.
An AC adapter, characterized in that a board is fixed, and a surface of the PC board to be soldered is disposed on a tip side of the protrusion to dip-solder the soldering surface.