JPH0211771Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of flyback transformers used in high voltage generation circuits such as television receivers, and in particular allows a diode to be easily and reliably connected to a high voltage coil. Regarding the flyback transformer.

Generally, a flyback transformer used in a television receiver includes a core, a low-voltage coil section provided on the outer periphery of the core and connected to a power supply, and a low-voltage coil section provided on the outer periphery of the low-voltage coil section, which is connected to a high voltage. It consists of a high-voltage coil section.

1 and 2 show a high voltage coil section of a flyback transformer according to the prior art.

In the figure, reference numeral 1 denotes a cylindrical high-pressure bobbin made of plastic that constitutes a high-voltage coil section 2, and a low-pressure bobbin that constitutes a low-voltage coil section 3 is inserted into a hollow hole of the high-pressure bobbin 1. Numerals 4, 5, 6, and 7 are columnar protrusions erected at one end of the high-voltage bobbin 1, of which columnar protrusion 4 serves as a locking portion to which a starting end line 24A of the high-voltage coil 24, which will be described later, is locked, and the other columnar protrusions The protrusions 5, 6, and 7 serve as diode mounting portions. 8, 9, 10 are the diode mounting parts 5,
This is a diode mounting portion consisting of columnar projections erected perpendicular to 6 and 7. On the other hand, at the other end of the high-pressure bobbin 1, diode mounting parts 5', 6', and 7' having the same shape as the diode mounting parts 5, 6, and 7 stand upright, facing the diode mounting parts 5, 6, and 7. Further, diode mounting parts 8', 9', and 10' having the same shape as the diode mounting parts 8, 9, and 10 are erected facing the diode mounting parts 8, 9, and 10. 11 to 23 are the diode mounting parts 4 to 1
These are terminals made of conductors erected on the top surfaces of 0 and 5' to 10'.

Reference numeral 24 denotes a high-voltage coil, and the high-voltage coil 24 is wound alternately in a laminated manner with an interlayer insulating member 25 in the radial direction around the outer peripheral surface of the high-voltage bobbin. One end of the high-voltage coil of each layer becomes a starting end wire 24A, and the other end becomes a terminal end wire 24B, which extend in a direction perpendicular to the winding direction (axial direction of the high-voltage bobbin 1).
A is wound around each terminal 11 to 17, and each terminal wire 24
B is wound around each terminal 18-23 (see FIG. 2).

26, 26, ... are between each pair of terminals 12, 18,
Between 13 and 19, between 14 and 20, between 15 and 21, 1
The high-voltage coils 24 of each layer are connected in series through the diodes 6 and 22 and between 17 and 23, thereby forming the high-voltage coil section 2 for the low-voltage coil section 3. . Note that 27 is a core inserted into the low voltage coil section 3.

The high-voltage coil section 2 according to the prior art is configured as described above, but between each pair of terminals 12, 18 to 17,
Each diode 26 provided between each diode 23
As shown in FIG. 2, the tips of the lead wires 26A and 26B protruding from both sides of the diode 26 are brought into contact with the tips of the terminals 12 to 23, and the contact portions are connected to the soldered portions 28. , 29 to fix the terminals 12 to 23 by soldering.

However, in the above-described connection structure between the terminals 12 to 23 and the lead wires 26A and 26B of each diode 26, when the lead wires 26A and 26B are brought into contact with the terminals 12 to 23 and the contact portions are soldered, Since there is no means for holding each of the diodes 26 on the high voltage bobbin 1, all contacting and soldering operations must be performed manually, resulting in a disadvantage that the manufacturing efficiency of the flyback transformer is low. Also,
The positioning of the lead wires 26A and 26B when they are brought into contact with the terminals 12 to 23 is done manually, which leads to connection failures and reduces the reliability of the flyback transformer.

The present invention was proposed in view of the drawbacks of the prior art, and as a result, it is possible to connect the diode to the high voltage coil easily and reliably, which not only improves the reliability of the flyback transformer, but also improves the reliability of the flyback transformer. The purpose of the present invention is to provide a flyback transformer that can automate the manufacturing process.

In order to achieve this object, the feature of the configuration adopted by the present invention is that a fitting groove for holding the diode lead wire is formed in the diode mounting portion along the axial direction of the terminal.

Embodiments of the present invention will be described in detail below with reference to FIGS. 3 to 9. In each embodiment, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the explanation thereof will be omitted.

3 to 5 show a first embodiment of the present invention. In the figure, reference numerals 31 and 31' indicate diode mounting parts that stand upright facing each end of the high-pressure bobbin. In the following explanation, the diode mounting parts 31 and 31' are
In the high-pressure bobbin 1 shown in the figure, the description will be made assuming that this corresponds to a pair of diode mounting parts located at the same positions as the diode mounting parts 5 and 5'. Terminal insertion holes 31A, 31'A are formed in the diode mounting portions 31, 31' in the radial direction of the high voltage bobbin 1. And the terminal insertion holes 31A, 31'A
The terminals 12 and 18 project from the diode mounting parts 31 and 31' by being press-fitted into the terminals 12 and 18, and the starting end wire 24A of the high voltage coil is wound around the terminal 12, and the ending wire of the high voltage coil is wound around the terminal 18. 24B is wrapped around it.

32, 32' are fitting grooves located on a straight line connecting the terminals 12, 18 and facing the diode mounting parts 31, 31' along the axis of the terminals 12, 18; The insertion grooves 32 and 32' have a groove width that allows lead wires 33A and 33B of a diode 33, which will be described later, to be inserted, and the back wall thereof is connected to the terminal 1.
2, 18 has an inclined surface 32A inclined toward the distal end. Reference numeral 33 denotes a diode having lead wires 33A and 33B whose ends are bent into a dogleg shape, and the diode 33 is connected to the diode mounting portion by inserting the ends into the respective fitting grooves 32 and 32'. 31, 31', and the tips of the lead wires 33A, 33B are in contact with the terminals 12, 18 so as to press the terminals 12, 18 outward.

In the above description, the pair of diode mounting parts 31 and 31' located in the same position as the pair of diode mounting parts 5 and 5' according to the prior art was taken as an example, but each of the other parts in this embodiment is The pair of diode mounting portions is similarly constructed. Further, both ends of the lead wires 33A and 33B of the diode 33 may be bent into a "dog-dog" shape in advance or
When inserted into the fitting grooves 32, 32', it will form a “dog” shape.
It may be bent in a shape. Furthermore, the inner walls of the insertion grooves 32, 32' do not necessarily have to form the inclined surface 32A, and the shape is not limited to that in the embodiment as long as the tips of the lead wires 33A, 33B are connected to the terminals 12, 18.

According to this embodiment described in detail above, the lead wire 33
By inserting the dogleg shaped ends of A and 33B into the fitting grooves 32 and 32' of the diode mounting parts 31 and 31', the diode 33 is held between the diode mounting parts 31 and 31'. , the lead wire 3
Since the tips of 3A and 33B automatically contact the terminals 12 and 18, the diode 33 and high voltage coil 24
The starting line 24A and the ending line 24B can be reliably connected. After that, the lead wire 33
The diode 33 is reliably held on the high-voltage bobbin 1 by soldering the contact portions of the terminals 12 and 18 to the soldering portions 34. At this time, the soldering may be done manually, but as shown in FIG.
By turning the abutting portions of the terminals 12 and 18 downward and immersing the abutting portions in the solder 36 in the solder bath 35, the lead wire 33A, the terminal 12, the starting end wire 24A, the lead wire 33B, the terminal 18 and The terminal wires 24B can be reliably soldered as the soldering portions 34, and this process can be automated.

Next, a second embodiment of the present invention is shown in FIGS. 6 and 7. The second embodiment is characterized by a pair of diode mounting parts 41, 41' (41
(not shown) is formed with a terminal insertion hole 41'A in the radial direction of the high voltage bobbin 1, and the terminal 18 is inserted into the terminal insertion hole 41'A.
1'A and press-fit it to the terminal wire 24B of the high voltage coil 24.
At the same time, a fitting groove 42' is formed, which is located beside the terminal insertion hole 41'A (in the circumferential direction of the high-pressure bobbin 1) and is inclined upward toward the terminal insertion hole 41'A side. It's what I did. According to this embodiment configured in this way, the lead wires 43A and 43B of the diode 43 are connected similarly to the lead wires 33A and 33B of the diode 33 in the first embodiment.
The “dog” shaped tip of the above-mentioned fitting groove 42, 42'
(42 is not shown), the tips of the lead wires 43A, 43B are regulated by the inclined fitting grooves 42, 42', and the terminals 12, 18 (12
(not shown) are connected in pressure contact with each other.

Figures 8 and 9 show a third embodiment of the invention. The feature of the third embodiment is that a terminal insertion hole 51'B is provided in the outer surface 51'A of the pair of diode mounting parts 51, 51' (52 is not shown) in the axial direction of the high voltage bobbin 1. , and the terminal insertion hole 5
The terminal 18 is press-fitted into the terminal 1'B and the terminal wire 24B of the high-voltage coil 24 is wound around it, and the top surface of the diode mounting portion 51' is provided with an inclined surface that slopes in the direction of the terminal 18 from the middle to the outer surface 51'A. A fitting groove 52' having a concave cross section and having a diameter of 52'A is formed along the axial direction of the terminal 18.

According to this embodiment configured as described above, the "dog-shaped" tips of the lead wires 53A and 53B are simply inserted into the fitting groove 52' with the tips facing downward, and the tips are connected to the terminals 18. Since the diode 53 is in contact with the terminal 18, the diode 53 can be easily connected to the terminal 18.

In the second and third embodiments described above, the contact portions of the lead wire 43B and the terminal 18 and the contact portions of the lead wire 53B and the terminal 18 are connected to the solder 36 in the solder bus 35, as in the first embodiment. It is possible to automate soldering by dipping.
In addition, in the third embodiment, the tip of the lead wire 53B of the diode 53 is bent in a "dog-shaped" shape, but the tip of the lead wire 53B is made straight, and the terminal 18 is bent slightly in a "dog-shaped" shape. It may be bent in a shape.

As explained in detail above, according to the present invention, by simply inserting the tip of the lead wire of the diode into the insertion groove formed in the diode mounting portion, the diode and the starting and ending wires of the high voltage coil can be easily connected. Furthermore, since the connection can be made reliably, the reliability of the flyback transformer is improved. In addition, the contact area between the tip of the diode lead wire and the terminal can be soldered using a solder bus.
It is possible to automate the manufacture of flyback transformers.

[Brief explanation of the drawing]

1 and 2 relate to a conventional flyback transformer, in which FIG. 1 is a perspective view showing its overall configuration, FIG. 2 is a partial front view showing the state of connection between terminals and diodes, and FIGS. 5 shows the first embodiment of the present invention, FIG. 3 is an enlarged perspective view showing the connection state between the terminal and the diode, FIG. 4 is a longitudinal sectional view in the direction of arrow A in FIG. 3, and FIG. The figure is an explanatory diagram showing the case where the abutting part of the diode lead wire and the terminal are soldered using a solder bus. Figures 6 and 7 show a second embodiment of the present invention. A partially enlarged perspective view showing the connection state between the terminal and the lead wire of the diode, FIG. 7 is a longitudinal cross-sectional view in the direction of arrow B in FIG. 6,
8 and 9 show a third embodiment of the present invention, FIG. 8 is a partially enlarged perspective view showing the connection state between the terminal and the lead wire of the diode, and FIG. 9 is the C arrow in FIG. FIG. 3 is a vertical cross-sectional view in the viewing direction. 1...High pressure bobbin, 5-10, 5'-10', 3
1, 31', 41, 41', 51, 51'...Diode mounting part, 11-23...Terminal, 32, 4
2, 52... Fitting groove.

Claims (1)

[Scope of utility model registration request] It consists of a core, a low-voltage coil section provided on the outer periphery of the core, and a high-voltage coil section provided on the outer periphery of the low-voltage coil section, and the high-voltage bobbin constituting the high-voltage coil section has two opposite ends. Alternatively, in a flyback transformer having a plurality of diode mounting portions and a terminal protruding from each of the diode mounting portions, each of the diode mounting portions holds a diode lead wire along the axial direction of the terminal. A flyback transformer characterized by forming a fitting groove.