JPH0754993Y2 - Flyback transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a flyback transformer having a resistor for preventing ringing.

[Conventional technology]

A flyback transformer is attached to a cathode ray tube of a television receiver or a display device. This type of flyback transformer is configured by fitting a low voltage coil 2 and a high voltage coil 3 to a core 1 as shown in FIG. The low-voltage coil 2 is formed by winding a winding wire around a low-voltage bobbin, and the high-voltage coil 3 is formed by winding the winding wire around a high-voltage bobbin through a rectifying diode 4 in a divided manner. It is fitted on the outside of the coil 2. In this fitted state, as shown in FIG. 5, a terminal block 5 is provided on the lower end side of the low-voltage coil 2 so as to project in the axial direction (length direction) of the low-voltage bobbin. A terminal pin 6 is provided so as to project from the end face in the same direction.

On the other hand, a pair of terminal blocks 7a, 7
b is projected in a direction perpendicular to the axial direction of the bobbin, and further terminal pins 8a, 8b are projected from the projecting tip surfaces of the terminal blocks 7a, 7b. On the lower end side of the high-voltage bobbin, one extra terminal block 7 is provided than the number of terminal blocks 7b on the upper end side.
a'is provided on the terminal block 7a '
a'is protruding.

Usually, a resistor 10 for preventing ringing is provided in the haloback transformer as shown in FIG. 4 in order to prevent ringing (occurrence of stripes of raster on the screen of the cathode ray tube and waviness in the vertical direction of the scanning line). Is connected to the winding start side of the high voltage coil 3. Specifically, as shown in FIG. 5, the resistor 10 includes a terminal pin 8a 'on the high voltage bobbin side and a terminal pin 6 on the low voltage bobbin side located near the terminal pin 8a'.
It is connected and fixed by soldering in between.

[Problems to be solved by the device]

However, in the above-mentioned conventional flyback transformer, as shown in FIG. 5, a resistor for preventing ringing is used.
When 10 is connected between the terminal pins 8a ', 6, before the connection, a hook portion 11 for hanging on the terminal pin 6 is formed at the tip of the lead on one side of the resistor 10, and the other It is necessary to perform a troublesome pre-processing in which a bent portion for connecting to the terminal pin 8a 'must be formed on the side lead. Then, in the solder connection, it is necessary to perform the alignment with great care so that the bent end portion is exactly at the position of the terminal pin 8a '. Moreover, as mentioned above, since complicated pre-processing and fine alignment are required, it is difficult to automate the connection of the resistor 10 between the terminal pins 8a 'and 6, which saves labor. It was an obstacle in trying.

The present invention has been made in order to solve the above-mentioned conventional problems, and the purpose thereof is to eliminate the need for meticulous attention when preprocessing or connecting the leads of the ringing prevention resistor, and to automatically incorporate the resistor. It is to provide a flyback transformer that can be easily performed.

[Means for Solving the Problems]

The present invention is configured as follows in order to achieve the above object. That is, according to the present invention, a high-voltage coil formed by winding a winding on a high-voltage bobbin is fitted to the outside of a low-voltage coil formed by winding a winding on a low-voltage bobbin, and the high-voltage bobbin is arranged in the terminal pin and its vicinity. In a flyback transformer in which a ringing prevention resistor is connected between the terminal pin of the low voltage bobbin and the ringing prevention resistor, the ringing prevention resistor is a plate formed of conductive rubber in which a resistance component and a rubber component are mixed. -Shaped resistor, and fitting holes are formed on both end sides of the resistor, the fitting hole on one end side is a terminal pin of the low voltage bobbin, and the fitting hole on the other side is a terminal of the high voltage bobbin. The resistors are fitted into the respective pins, and the resistors are fixed to the terminal pins by the rubber elasticity of the resistors, and the resistors are conductively mounted between the terminal pins of the low voltage bobbin and the terminal pins of the high voltage bobbin. It is configured as characterized in that there.

[Action]

In the present invention, by fitting the fitting hole on one end side of the resistor into the terminal pin of the low voltage bobbin and the fitting hole on the other side into the terminal pin of the high voltage bobbin, the ringing prevention resistor is the resistor. It is fixed to the terminal pin by the rubber elasticity of and is conductively mounted between the terminal pin of the high voltage bobbin and the terminal pin of the low voltage bobbin arranged in the vicinity thereof.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same parts as those in the conventional example are designated by the same reference numerals, and the duplicate description thereof will be omitted. FIG. 1 shows a main configuration of a flyback transformer according to the present invention. In the flyback transformer of the present embodiment, the high voltage coil 3 is fitted on the outside of the low voltage coil 2 as in the conventional example, the low voltage bobbin has the terminal block 5 and the high voltage bobbin has both upper and lower ends thereof. Terminal blocks 7a and 7b forming a pair are provided on the side. In this embodiment, the terminal block 7 of the high voltage bobbin is
The base side of the terminal block 5a of the low-voltage bobbin adjacent to a'is cut out to form a step plane 12, and the L-shaped terminal pin 13 is provided in the hole provided on the tip side of the terminal block 5a excluding this cutout. Inserted and fixed. In this inserted and fixed state, the tip end side 13a of the L-shaped terminal 13 projects further forward from the tip end surface of the terminal block 5a, and the base end side 13b becomes the terminal pin 8a 'of the high-voltage bobbin from the position of the step plane 12. It projects upwards in parallel. A ringing prevention resistor 14 is connected between the base end side 13b of the L-shaped terminal pin 13 on the low voltage bobbin side and the terminal pin 8a 'of the high voltage bobbin.

The resistor 14 is formed into a plate shape by molding using conductive rubber in which a resistance component and a rubber component are mixed.
In the present embodiment, the step plane 12 is lower than the projecting tip surface of the terminal block 7a ', and therefore, the bottom surface of the resistor 14 is formed with a step surface corresponding to the step of the surfaces of both terminal blocks. There is. Fitting holes 15a and 15b are provided at both ends of the resistor 14, and the fitting hole 15a is fitted into the base end side 13b of the L-shaped terminal 13,
By fitting the fitting hole 15b into the terminal pin 8a ', the resistor 14 is connected to the L-shaped terminal 13 and the terminal pin 8a' as shown in FIG.
Installed in between. In this embodiment, the diameter of the fitting hole 15a is L
The diameter of the fitting hole 15b is formed to be slightly smaller than the outer diameter of the base end side 13b of the C-shaped terminal 13, and the diameter of the fitting hole 15b is formed to be slightly smaller than the outer diameter of the terminal pin 8a '. As a result,
When the fitting holes 15a and 15b are fitted into the terminal pins 13 and 8a ', the fitting holes 15a and 15b are pushed apart and fitted, and due to the restoring force of the rubber elasticity of the resistor 14, the resistor 14 has both ends. Child pin 13,8
It is fixedly attached to a'in a state that it does not come off. In this embodiment, the end faces of the fitting holes 15a, 15b on the bottom surface side of the resistor 14 are tapered so that the fitting holes 15a, 15b can be easily fitted into the terminal pins 13, 8a '.

The resistance value of the resistor 14 is matched with the resistance value of the conventional resistor 10 for preventing ringing, and this resistor 14 exhibits the same ringing preventing effect as the conventional resistor 10. 1 and 2, the tip side of the L-shaped terminal pin 13
13a cathode ray tube ABL (Automatic Brightness Limiter)
To the terminal pin 8a ', and the winding start side of the high voltage coil is connected to form a flyback transformer circuit as shown in FIG.

According to the present embodiment described above, the fitting holes 15a and 15 provided in the resistor 14 are provided.
Simply insert b into the corresponding terminal pin 13, 8a '
Is to be connected between the terminal pins 13 and 8a 'without any soldering.
Pre-processing such as bending of leads and forming hooks is unnecessary,
In addition, it is possible to relieve the need for careful alignment for connecting the resistor 10 to the terminal pin, and the work of attaching the resistor 14 for preventing ringing can be greatly facilitated. By facilitating this work, the resistor 14 can be automatically attached using an automatic machine, and the labor of assembling the flyback transformer can be significantly reduced.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, in the above embodiment,
Although the terminal pins on the side of the terminal block 5a are formed in an L shape, the linear terminal pins 16 are formed as shown in FIG. 3, for example.
May be In this case, the base end side of the terminal pin 16 is projected from the terminal block 5a to, for example, the terminal block 7a 'side of the high voltage bobbin, and the conductive rubber resistor 14 is formed in an L-shaped plate shape. Insert the fitting holes 15a and 15b formed in the resistor into the terminal pin 16
The resistor 14 may be fitted between the base end side and the terminal pin 8a 'of the high-voltage bobbin to connect the resistor 14 between the terminal pins 16 and 8a'.

[Effect of device]

According to the present invention, a resistor for preventing ringing is formed of a conductive rubber plate-like resistor, and fitting holes provided at both ends of the resistor are fitted into corresponding low-voltage bobbin and high-voltage bobbin terminal pins. Since the resistor is fixed to the terminal pins by the rubber elasticity of the resistor and the resistor is electrically connected between the terminal pins without any soldering, it is conventionally required. This eliminates the need for complicated resistor leads and complicated pre-processing such as bending, and also eliminates the need for careful attention when aligning the resistors by soldering them between the terminal pins. It is possible to connect and mount the resistor between the corresponding terminal pins.

By simplifying the mounting work in this way, it becomes possible to automatically incorporate the resistor by using an automatic machine, and it is possible to achieve a great labor saving of the resistor incorporation.

[Brief description of drawings]

FIG. 1 is a schematic view of an essential part showing an embodiment of a flyback transformer according to the present invention, and FIG. 2 is a perspective view of the same embodiment in which resistors are fitted and attached to terminal pins of a low voltage bobbin and a high voltage bobbin. FIG. 3 is a perspective view showing another example of the mounting structure of a resistor, FIG. 4 is a general circuit diagram of a flyback transformer, and FIG. 5 is a mounting mode of a ringing prevention resistor in a conventional flyback transformer. FIG. 1 ... Core, 2 ... Low-voltage coil, 3 ... High-voltage coil, 4
...... Rectifier diode, 5,5a ...... Terminal block, 6 ...... Terminal pin, 7a, 7a ', 7b ...... Terminal block, 8a, 8a', 8b ...... Terminal pin,
10 ... Resistor, 11 ... Hook part, 12 ... Step plane, 13 ...
… L-shaped terminal pin, 13a …… Tip side, 13a …… Base end side, 14…
… Resistors, 15a, 15b …… Mating holes, 16 …… Terminal pins.

Claims (1)

[Scope of utility model registration request] 1. A high-voltage coil formed by winding a winding on a high-voltage bobbin is fitted on the outside of a low-voltage coil formed by winding a winding on a low-voltage bobbin, and is arranged in the terminal pin of the high-voltage bobbin and its vicinity. In a flyback transformer in which a ringing prevention resistor is connected between the terminal pin of a low voltage bobbin and a ringback prevention resistor, the ringing prevention resistor is a plate-like member made of conductive rubber in which a resistance component and a rubber component are mixed. Of the resistor body, and fitting holes are formed on both end sides of the resistor body, one fitting hole of which is a terminal pin of the low voltage bobbin and the other fitting hole is a terminal pin of the high voltage bobbin. The resistor is fixed to the terminal pin by the rubber elasticity of the resistor, and the resistor is conductively mounted between the terminal pin of the low voltage bobbin and the terminal pin of the high voltage bobbin. A flyback transformer, wherein.