JPH0897053A - Wire-wound device, electric power control device, and electric equipment - Google Patents

Abstract

PURPOSE: To obtain a wire-wound device which is lessened in size even if a thick winding wire is used and which can secure an enough insulating distance. CONSTITUTION: A primary winding 1 serving as a second winding is 0.8mm in diameter, and a secondary winding 2 serving as a first winding is 2.2mm in diameter. One end of the secondary winding 2 is sheathed in an insulating coating of vinyl tube, and a sloped lead-out part 2c led out of a flange 5b is formed. An insulating sheet 5a is provided onto the secondary winding 2 layer spreading over the lead-out part 2c, and the primary winding 1 is wound on the insulating sheet 5a in layers.

Description

Detailed Description of the Invention

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device using a winding such as a transformer, a power control device and electric equipment.

[0003]

2. Description of the Related Art Conventionally, a device using a power supply device for supplying a large amount of electric power such as a printer uses a temperature fuse, a thermal protector or the like as a safety measure for avoiding ignition of a transformer winding when the switching element is at a high temperature. Means such as stopping the circuit are adopted.

The reason why the ignition of the winding occurs is that the wire diameter of the winding is used at the limit of the current value that can be tolerated, so that the power supply voltage rises rapidly and the temperature of the winding rises. And fire.

Therefore, if the wire diameter is made thicker, a winding device having a structure capable of sufficiently withstanding a large current can be obtained. However, the winding device is planted in the winding device according to the wire diameter of the winding wire. If the wire diameter of the lead pin is increased, it becomes necessary to increase the diameter of the pin hole of the wiring board according to the lead pin. The difference in pinhole diameter of the wiring board complicates the pinhole forming process of the wiring board and leads to a difficulty in manufacturing the wiring board at low cost.

When a thick winding is wound around a lead pin, if the winding is attempted a necessary number of times to strengthen the connection between the winding and the lead pin, the winding is thick and the connection between the winding and the lead pin is large. The area is widely occupied in the longitudinal direction of the lead pin. If the connection point occupies a large area in the longitudinal direction of the lead pin, it is necessary to lengthen the lead pin of the winding, or when the winding device is mounted on the wiring board, the top of the winding device is occupied in the longitudinal direction of the lead pin. Since it cannot be lowered, it becomes an obstacle to miniaturization of the winding device.

On the other hand, of the transformer windings, there is a technique in which a thick winding is derived from the collar of the coil bobbin and directly attached to the wiring board. In this case, since a thick winding is not attached to the lead pin, the lead pin attached to the transformer may have a small diameter.

Further, according to the above-mentioned conventional one, when it is attempted to wind the second winding on the thick winding layer, the thick winding layer and the second winding layer are provided between the thick winding layer and the second winding layer. Had a sufficient insulation distance, and an insulating sheet was interposed between the thick winding layer and the second winding layer.

To explain further, the portion of the coil bobbin which is led out from the flange is an inclined portion. When the second winding is wound around this lead-out portion, winding collapse occurs. Therefore, the insulating sheet is arranged avoiding the inclined portion. Then, the second winding was wound on it. An insulating coating was provided on the winding lead-out portion, which is the inclined portion.

[0010]

However, the conventional winding device has a problem that it is difficult to secure an insulation distance between the thick winding and the second winding. That is, the winding lead-out portion, which is the inclined portion, is provided with an insulating coating, but the portion of the winding layer other than the inclined portion is not insulated and is not covered with the insulating coating. The insulation distance between the first winding and the second winding is short, and when the second winding collapses, insulation breakdown occurs.

The present invention has been made in order to solve the above problems, and an object thereof is to make a winding device compact even when a thick winding is wound and to provide a sufficient insulation distance. An object is to provide a winding device, a power control device, and an electric device that can be used.

[0012]

According to a first aspect of the present invention, a coil bobbin having a winding groove and a collar formed at both ends of the winding groove, and at least one layer wound around the winding groove of the coil bobbin, one end of which is wound. A first winding having a lead-out portion derived from the collar of the coil bobbin, a second winding wound on a layer of the first winding of the coil bobbin, the first winding and the second winding
An insulating layer made of an electrically insulating material, which is interposed between the windings and is disposed over the lead-out portion, and a winding device.

A second aspect of the present invention is a coil bobbin having a winding groove and flanges formed at both ends of the winding groove,
A plurality of lead pins embedded in the coil bobbin, a first winding wound at least one layer in a winding groove of the coil bobbin, and having a lead-out portion whose one end is led out from the flange of the coil bobbin, and a layer of the first winding of the coil bobbin A second winding wound above and connected to the lead pin, and an insulation made of an electrically insulating material interposed between the first winding and the second winding and disposed over the lead-out portion. A winding device comprising: a layer;

A third aspect of the present invention is the winding device according to the first or second aspect, wherein the lead-out portion is covered with an electrically insulating coating.

According to a fourth aspect of the invention, the first winding is the second winding.
The winding device according to any one of claims 1 to 3, wherein the wire diameter is larger than that of the winding wire.

According to a fifth aspect of the present invention, there is provided the winding device according to any one of the first to fourth aspects, wherein the winding device has a plurality of second windings wound around the coil bobbin.

According to a sixth aspect of the present invention, a power source and a power control unit including the winding device according to any one of the first to fifth aspects, which is electrically connected to the power source and which converts and outputs the power from the power source. And a power control device.

The invention according to claim 7 is a power source and a power control section including a winding device according to any one of claims 1 to 5, which is electrically connected to the power source and which converts and outputs power from the power source. And a load that is connected to the winding device and that urges the output of the power control unit.

In the first to seventh aspects, the winding device is
In addition to the transformer, it includes an inductor having two or more windings. The winding includes a single wire and a twisted wire such as a litz wire.

In claim 7, the load may be any load as long as it operates by receiving the output of the power control device, and includes a lamp, a heater, a motor, a display device, a copying machine part, an inverter circuit, etc. Is a copy machine, printer, etc.
In addition to equipment A, the lamp, heater, motor, display device,
Copier parts, electrical equipment that uses an inverter circuit as a load. Note that the constituent features of claims 1 to 5 may employ well-known means and parts other than the above.

[0021]

According to the invention of claim 1, a coil bobbin having a winding groove and a collar formed at both ends of the winding groove, and at least one layer wound around the winding groove of the coil bobbin, and one end of the coil bobbin from the collar of the coil bobbin. A first winding having a lead-out portion to be led out, a second winding wound on a layer of the first winding of the coil bobbin, and the lead-out interposed between the first winding and the second winding. And an insulating layer made of an electrically insulating material, which is disposed over the entire portion, and the insulating distance between the first winding and the second winding is sufficient, and the insulating layer is led out. By arranging the second winding sufficiently, the insulation distance is sufficient even if the second winding is broken.

According to the second aspect of the invention, the second winding is connected to the plurality of lead pins planted in the coil bobbin, so that the work process is simple when the winding device is attached to the wiring board. .

According to the invention of claim 3, since the lead-out portion is covered with an electrically insulating coating, the insulation distance between the first winding and the second winding is more sufficient than that of the invention of claim 1. Can be secured.

According to the invention of claim 4, it has the operation according to any one of claims 1 and 2.

According to the invention of claim 5, since there are a plurality of second windings wound around the coil bobbin, winding collapse easily occurs, but a sufficient insulation distance can be secured.

[0026] According to the invention of claim 6, it is electrically connected to a power source, and the power from the power source is converted and output.
And a power control unit including the winding device according to any one of claims 1 to 5, so that the power control device has the operation according to any one of claims 1 to 5.

According to the invention of claim 7, it is electrically connected to a power source, and the power from the power source is converted and output.
6. A power control unit including the winding device according to any one of claims 1 to 5 and a load connected to the winding device for energizing an output of the power control unit. An electric device having the action described in (1).

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment common to claims 1 to 7 will be described with reference to FIGS.

First, the winding device 13 will be described.

Reference numeral 4 is a coil bobbin made of, for example, phenol resin. The coil bobbin 4 has a winding groove 5 and a collar 5
b is formed, and the primary winding 1 and the secondary winding 2 are wound around the winding groove 5 with an insulating sheet 5a serving as an electrical insulating layer made of polyester or the like for each layer.

The primary winding 1 as the second winding has a wire diameter of 0.8 m.
m, the secondary winding 2 which is the first winding is 2.2 mm, and the permissible current values are 4 A and 20 A, respectively.

The secondary winding 2 has an insulating coating 2b having a vinyl tube at one end, and forms a lead-out portion 2c which is led out from the collar 5b and is inclined.

The insulating sheet 5a is arranged on the winding layer of the secondary winding 2 up to the lead-out portion 2c.
A plurality of secondary windings 2 are wound on a. 5d,
5d is an insulating tape thicker than the insulating sheet.

A terminal block 6 is formed at the lower end of the coil bobbin 4, and eight lead pins 7z, 7a, 7 are arranged in two rows.
b, 7c, 7d, 7e, 7f and 7g are planted in parallel in two rows.

Explaining the primary winding 1 in detail, both ends 1x and 1y of the primary winding 1 are wound around the lead pin 7a, and the fuse wire 5 is transferred from the lead pin 7a to the lead pin 7z.
As 0, a conductor wire having a wire diameter of 0.2 mm and an allowable current value of 3 A is wound four times and connected. Both ends 2x and 2y of the secondary winding are directly connected to a wiring board 21 described later.

After winding a wire around the coil bobbin 4 and soldering it, the cores E and I made of ferrite and having the E and I cross sections are formed.
And the fixing tape 12 is wound around the cores E and I to complete the winding device 13.

Reference numeral 21 is a flat wiring board made of epoxy resin, and a film wiring 25 serving as a conductive film is formed on the lower surface of the wiring board.
printing z.

A film wiring 25z is printed in the through hole 22z corresponding to the lead pin 7a at the one end 1x of the primary winding, and no conductive film is formed in the through hole 23a. The lead pin 7a is fixed by soldering after winding both ends of the primary winding 1, but the number of windings is four. Further, the fuse wire 50 is wound around the lead pin 7a four times.

Next, the power control device will be described. 40
Is a power control device as a high-voltage power supply, and circuit components of the wiring device 20 are used as they are as circuit components overlapping the description of the wiring device 20 described above. 41 is a direct current power source as a power source, 42 is a rectifying / smoothing circuit, 13 is the above-described winding device, 30 is a switching unit, 43 is a rectifying circuit, and 29 is a control circuit for adjusting conduction control of the switching unit 27. .

When a DC voltage of 85V is supplied from the DC power supply 41, a current of 2.53A flows through the primary winding 1 by the voltage stabilization control of the control circuit 29, but the current value is 3A due to the fluctuation of the power supply voltage. When it goes over, the fuse 50 is broken,
Ignition of the primary winding can be prevented.

Reference numeral 60 is a printer as an electric device. The printer 60 includes a printer main body 61 as a housing, an output side of the power control device 40, and a load 4 for example.
For example, a heater connected as a heater 2 is stored.

[0042]

According to the invention of claim 1, a coil bobbin having a winding groove and a collar formed at both ends of the winding groove, and at least one layer wound around the winding groove of the coil bobbin,
A first winding having a lead-out portion whose one end is led out from the collar of the coil bobbin; a second winding wound on a layer of the first winding of the coil bobbin; the first winding and the second winding; An insulating layer made of an electrically insulating material, which is interposed between the wires and is disposed over the lead-out portion, is provided, so that the insulation distance between the first winding and the second winding is sufficient. By sufficiently disposing the insulating layer over the lead-out portion, the insulation distance is sufficient even if the second winding is broken.

According to the second aspect of the invention, the second winding is connected to the plurality of lead pins planted in the coil bobbin, so that the work process is simplified when the winding device is attached to the wiring board. .

According to the invention of claim 3, since the lead-out portion is electrically insulated, the insulation distance between the first winding and the second winding is more sufficient than that of the invention of claim 1. Can be secured.

According to the invention of claim 4, it has the operation according to any one of claims 1 and 2.

According to the invention of claim 5, since there are a plurality of second windings wound around the coil bobbin, winding collapse easily occurs, but a sufficient insulation distance can be secured.

According to the invention of claim 6, it is electrically connected to a power source, and the power from the power source is converted and output.
And a power control unit including the winding device according to any one of claims 1 to 5, so that the power control device has the operation according to any one of claims 1 to 5.

According to the invention of claim 7, it is electrically connected to the power source, and the power from the power source is converted and output.
6. A power control unit including the winding device according to any one of claims 1 to 5, and a load connected to the winding device for energizing the output of the power control unit. An electric device having the action described in (1).

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing FIG. 2 along AA.

FIG. 2 is a front view showing the outer appearance of a winding device according to one embodiment of claims 1 to 7.

FIG. 3 is a bottom view showing a main part of one embodiment of claims 1 to 4.

FIG. 4 is a circuit diagram showing a main part of one embodiment of claims 1 to 4.

FIG. 5 is a partially transparent front view showing an electric device according to an embodiment of claims 1 to 4.

[Explanation of symbols]

4 ... Coil bobbin, 1 ... Second winding, 2 ...
First winding, 5a ... Insulating layer, 40 ... Power control device, 41 ... Power supply, 42 ... Load

Claims (7)

[Claims] 1. A coil bobbin having a winding groove and a collar formed at both ends of the winding groove; and a lead-out portion wound at least one layer around the winding groove of the coil bobbin and having one end led out from the collar of the coil bobbin. A first winding; a second winding wound on a layer of the first winding of the coil bobbin; interposed between the first winding and the second winding and disposed over the lead-out portion And an insulating layer made of an electrically insulating material as described above. 2. A coil bobbin having a winding groove and a collar formed at both ends of the winding groove; a plurality of lead pins embedded in the coil bobbin; at least one layer wound around the winding groove of the coil bobbin, and one end of which is wound. A first winding having a lead-out portion derived from the collar of the coil bobbin; a second winding wound on a layer of the first winding of the coil bobbin and connected to the lead pin; the first winding and the first winding An insulating layer made of an electrically insulating material, which is interposed between the two windings and is disposed over the lead-out portion; 3. The wiring device according to claim 1, wherein the lead-out portion is covered with an electrically insulating coating. 4. The winding device according to claim 1, wherein the first winding has a wire diameter larger than that of the second winding. 5. The winding device according to claim 1, further comprising a plurality of second windings wound around the coil bobbin. 6. A power supply; and a power control unit including the winding device according to any one of claims 1 to 5, which is electrically connected to the power supply and converts and outputs the power from the power supply. A power control device characterized by the above. 7. A power supply; a power control unit including the winding device according to any one of claims 1 to 5, which is electrically connected to the power supply and converts and outputs the power from the power supply. An electric device comprising: a load connected to the device and urging the output of the power control unit.