JPH0467329B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ballast for a discharge lamp, and more particularly to wiring of a coil lead wire in a ballast in which a primary coil and a secondary coil are mounted on the same core.

(Prior art) Generally, a discharge lamp lighting circuit using a ballast has a third
As shown in the figure, a power source 2 is connected to both ends of a primary coil 1, and a secondary coil 3 has one end connected in series to one end of this primary coil 1 and the other end of this primary coil 1.
Wiring is used to connect the other end to both ends of the discharge lamp 4. For this reason, conventional discharge lamp ballasts
As shown in FIGS. 1 and 2, a primary coil 7 and a secondary coil 8 each having a winding wound around a pair of molded bobbins 5 and 6 are attached to an iron core 9 to constitute a ballast main body 10, The winding start lead wire 13 and the winding end lead wire 14 of the primary coil 7 are connected and fixed to a pair of terminals 11 and 12 provided at one outer end of the bobbin 5 of the primary coil 7, and The winding start lead wire 16 of the secondary coil 8 is connected and fixed to the terminal 15 provided at one outer end, and the winding end lead wire 17 of the secondary coil 8 is drawn out long and used as a free end to insulate the winding end of the coil. After holding the iron core 9 with adhesive tape and attaching it to the primary coil 7 and secondary coil 8 in this state, connect it by wiring it as a wiring 18 across the terminal 12 provided at one outer end of the bobbin 5 of the primary coil 7. A similar structure was adopted.

In such a wiring configuration, in a device in which a ballast is arranged in the center of the device body and a lamp socket is arranged at both ends, both lead wires 13 and 14 of the primary coil 7
The power supply side lead wires are connected to the terminals 11 and 12 connected to the terminals 11 and 12 connected to the terminals 11 and 12 connected to the winding end lead wire 14 of the primary coil 7, and the winding start lead wire 16 of the secondary coil 8.
The lamp socket can be connected to the connected terminal 15 by a lead wire, which has the advantage that the connection of the lead wire can be simplified and wiring can be facilitated.

(Problems to be solved by the invention) However, in the ballast of the above conventional structure,
In the assembly process of the ballast, it is necessary to wire the winding end lead wire 17 of the secondary coil 8 to the primary coil 7, which is an obstacle to automated assembly of the ballast.

For this reason, a ballast for discharge lamps having a structure described in Japanese Utility Model Application Publication No. 56-137429 has been proposed.
This ballast has a primary coil 7 as shown in FIG.
Both ends of the connecting wire 20 are connected to the terminal 12 at one outer end of the bobbin to which the winding end lead-out wire 14 is connected, and the terminal 19 provided at the other outer end of the bobbin. The winding end lead wire 17 of the secondary coil 8 is connected to the terminal 21 provided at the outer end opposite to the winding end wire 17 of the secondary coil 8, and the pair of bobbins are arranged side by side and attached to the iron core. 2
A configuration has been proposed in which the connection wire 20 and the end-of-turn lead wire 14 of the primary coil 7 are connected at 1.

This configuration does not require a crossover wire from the primary coil 7 to the secondary coil 8, and has the advantage that automated assembly can be easily performed. This requires an insulating material to protect the wiring over the upper insulating material of the primary coil 7, which poses a problem in that the insulation and protection of the connecting wire 20 is time-consuming.

The present invention was made in view of the above problems, and in the assembly process of a ballast, the connecting wire between the primary coil and the secondary coil is eliminated, wiring can be simplified, and the connecting wire is insulated and protected. The present invention provides a ballast for a discharge lamp that can omit the steps and facilitate automatic assembly.

(Means for Solving the Problems) The discharge lamp ballast of the present invention has a primary coil and a secondary coil each having a winding wound around a molded bobbin, and the pair of coils are connected in series. A ballast body is constructed by attaching coil bobbins arranged in parallel to an iron core, and terminals for connecting and fixing the coil lead wires are provided at both outer ends of each bobbin of the pair of coils, and the primary coil is connected to the winding start lead wire. and the winding end lead wires are connected to the terminals provided at the outer end of one side of the bobbin, and the connecting wires connecting the primary coil and the secondary coil are connected to the outer periphery of the outer layer around which the primary coil is wound. One end is connected to a terminal connected to the end-of-winding lead wire of the coil bobbin around which the primary coil is wound, and the other end is connected to a terminal provided at the other outer end of the coil bobbin close to the secondary coil bobbin. The secondary coil has a winding start lead wire connected to a terminal provided at one outer end of the bobbin, and a winding end lead wire connected to a terminal provided at the other outer end close to the primary coil bobbin. , the lead wire located between the pair of coil bobbins is connected and fixed by the terminal facing between the coil bobbins.

(Function) In the discharge lamp ballast of the present invention, the winding start lead wire and winding end lead wire of the primary coil are connected to terminals provided at the outer end of one side of the bobbin, and the secondary coil is connected to the winding start lead wire. is connected to a terminal provided at the outer end of one side of the bobbin, and the winding end lead wire is connected to a terminal provided at the outer end of the other side close to the primary coil bobbin. Then, the connection wire connecting the primary coil and the secondary coil is wound several times around the outer circumference of the outer layer around which the primary coil is wound, and both ends are attached to the outer ends of the coil bobbin around which the primary coil is wound. Connect the terminal to which the lead wire is connected to a terminal provided at the other outer end close to the secondary coil bobbin, and connect and fix the lead wire located between the pair of coil bobbins with the terminal facing between the coil bobbins. Therefore, there is no need for crossover wiring between both coils, and the amount of protective insulating material can be reduced.

(Embodiment) The configuration of an embodiment of the present invention will be explained with reference to FIGS. 5 to 8.

22 and 23 are molded bobbins, as shown in Figures 6 and 8.
As shown in FIG.
A pair of terminals 2 are provided on the terminal block portion 26 provided on the outer surface of the
7 and 28 are provided, and a winding start lead wire 29 and a winding end lead wire 30 of the primary coil 24 wound around the bobbin 22 are connected and fixed to both terminals 27 and 28.

Further, a terminal 33 is provided on one side of the terminal block portion 32 protruding from the outer surface of the other outer end flange portion 31 of the bobbin 22.
is provided. This terminal 33 is connected to the terminal 2 to which the winding end lead wire 30 of the primary coil 24 is connected.
8 and both ends of a connecting wire 34 wound around the outer periphery of the outer layer around which the primary coil 24 is wound are connected. The connecting wire 34 is wound several times to the extent that the voltage between the outer winding layer of the primary coil 24 and the connecting wire 34 is divided and the electrical characteristics of the primary coil are not affected. Next, the primary coil 24 is connected from the outer periphery of this connecting wire 34.
Wrap the upper insulation material around.

Next, the coil bobbin 23 on which the winding of the other secondary coil 35 is wound is provided with a terminal 38 on one side of a terminal block portion 37 provided on the outer surface of one outer end flange portion 36. A winding start lead wire 39 of the secondary coil 35 is connected. Further, a terminal 44 for connecting and fixing the winding end lead wire 43 of the secondary coil 35 is provided at the center of a terminal block portion 42 protruding from the outer surface of the other outer end flange portion 40 of the coil bobbin 23 .

Next, the pair of coil bobbins 22 and 23 are arranged in parallel, and the I-shaped iron core 4 is attached to both coil bobbins 22 and 23.
5, and E-shaped cores 46, 46 are fitted from both sides of the coil bobbins 22, 23 to form a stabilizer main body 47. Then, the flanges 31 and 40 of the pair of coil bobbins 22 and 23 are adjacent to each other.
The gap between them is positioned and maintained by the leakage legs 48 of the E-shaped cores 46, 46, and in this state, the ends of the terminals 33, 44 between both coil bobbins 22, 23 are joined or overlapped.

Next, the lead wire 43 wound around the terminals 33, 44 between the coil bobbins 22, 23 and the connecting wire 34 are connected and fixed with solder, and both terminals 3
3 and 44 are connected and fixed.

In this way, the assembled stabilizer main body 47
As shown in FIG.
The stabilizer 51 is constructed by covering with

In order to incorporate the ballast 51 into the lighting circuit shown in FIG. The lead wire was connected and fixed, and the lead wire was connected to one terminal 27 of the coil bobbin 21 around which the primary coil 24 was wound to a lamp socket provided at one end of the device body, and the secondary coil 35 was wound thereon. A terminal 38 provided on one of the flanges 36 of the coil bobbin 23 is connected to a lamp socket provided at the other end of the device body using a lead wire.

In the above embodiment, the coil bobbin 22 of the primary coil 24 and the coil bobbin 2 of the secondary coil 35 are
3 describes the coil bobbin having a different number of terminals, but the coil bobbin 23 of the secondary coil 35
The same coil bobbin as the primary coil 24 can also be used.

(Effects of the Invention) According to the present invention, terminals for fixing the lead wire of the coil are provided at both outer ends of each bobbin of a pair of coils consisting of a primary coil and a secondary coil, and this primary coil is wound. Connect one end of the connection wire wound several times around the outer periphery of the outer layer to the terminal connected to the end-of-winding lead wire of the primary coil, and connect the other end to the terminal at the other outer end of the coil bobbin close to the secondary coil bobbin. Then, the winding end lead wire of the secondary coil was connected to a terminal at the other outer end close to the primary coil bobbin, and the connecting wire located between each bobbin of the pair of coils and the lead wire were connected and fixed with the terminal. Therefore, for example, in a discharge lamp ballast that has a ballast placed in the center of the fixture and a lamp socket at both ends, the lead wire connection can be simplified and wiring can be easily done. There is no crossover wire between both coils in the assembly process, making wiring easy, and the provision of the connection wire eliminates the need for special insulation and protection insulation material. Therefore, automated assembly can be easily performed.

[Brief explanation of drawings]

Figure 1 is a plan view of a conventional discharge lamp ballast, Figure 2 is a circuit diagram of the same as above, Figure 3 is a lighting circuit diagram, Figure 4 is a circuit diagram of a previously proposed discharge lamp ballast, and Figure 5 is a circuit diagram of the previously proposed discharge lamp ballast. A perspective view of a ballast for a discharge lamp showing an embodiment of the present invention, No. 6
7 is a perspective view of the primary coil bobbin, and FIG. 8 is a circuit diagram of the same. 22, 23...Bobbin, 24...Primary coil,
27, 28, 33, 38, 44... terminal, 29,
30, 39, 43...Leader line, 34...Connection line,
35...Secondary coil.

Claims (1)

[Scope of Claims] 1. A ballast main body is constructed by mounting a pair of coil bobbins arranged in parallel on an iron core so as to connect a pair of coils, each consisting of a primary coil and a secondary coil, each having a winding wound around a molded bobbin, in series. Terminals for connecting and fixing coil lead wires are provided at both outer ends of each bobbin of the pair of coils, and the primary coil has a winding start lead wire and a winding end lead wire connected to the outside of one side of the bobbin. At the same time, the connecting wire connecting the primary coil and the secondary coil is wound several times around the outer periphery of the outer layer of the primary coil, and one end of the connecting wire is connected to the terminal provided at the end of the primary coil. The winding end lead wire of the wound coil bobbin is connected to a terminal, and the other end is connected to a terminal provided on the other outer end of the coil bobbin close to the secondary coil bobbin, and the secondary coil has a winding start lead wire connected to the terminal. Connect the winding end lead wire to the terminal provided at the outer end of one side of the bobbin, and connect the lead wire located between the pair of coil bobbins to the terminal provided at the outer end of the other side close to the primary coil bobbin. A ballast for a discharge lamp, characterized in that the connection is fixed between the coil bobbins at the terminals facing each other.