JP3004651U - Ballast protector - Google Patents

Abstract

(57) [Summary] (Correction) [Structure] The opening 9 is formed in a part of the collar 10 and the protective cover A holding the thermal fuse 3 inside is pressed from above the terminal block 6. The contact piece 15 of the thermal fuse 3 is configured to press the upper surface of each solder 21 and the temperature sensing surface to press the side surface of the winding 18. [Effect] After the ballast is attached to the lighting equipment and connected, the thermal fuse held in the protective cover is integrated, so there is no problem in the manufacturing process of the ballast, and the protective cover and the temperature can be adjusted with one touch after the fact. A fuse can be attached.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a device for immediately detecting the temperature of a winding portion in a ballast and shutting off an input circuit when an abnormally high temperature occurs.

[Prior art]

 Conventionally, when the winding temperature rises abnormally, the method of disconnecting the input circuit by using a thermal fuse has been implemented, but in either method, the thermal fuse is constructed around the bobbin, or It is arranged on the winding side or the bobbin side such as by being arranged on the upper surface, the inner surface, etc.

[Problems to be solved by the device]

 In the conventional technology, since the thermal fuse is mounted around the bobbin and the winding in a separate process due to the configuration, workability is deteriorated in the manufacturing process, and the temperature fuse is not completely adhered to the winding surface. Therefore, it has a drawback that it cannot detect the accurate temperature. The present invention solves and provides such problems as the conventional techniques have.

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the protective device of the present invention holds a bobbin in which a part of a collar is formed in an opening shape and a thermal fuse to be inserted in the opening inside a protective cover, and engages the bobbin terminal block. Consists of protective covers with claws at both ends for stopping. If the product body is to be insulated with varnish, etc., immerse it with the terminal block facing upwards to eliminate varnish accumulation in the bobbin opening.

[Action]

 With the protective cover, the ballast is attached to the lighting fixture, and after connecting the wire, press it from above to lock the claws formed on both sides to both sides of the terminal block. When press-fitting the protective cover, push the thermal fuse inward with your fingertip. At all times, the temperature sensing surface of the thermal fuse is held in pressure contact with the side surface of the winding at a constant pressure to sense the temperature.

【Example】

 A description will be given according to examples. 1 to 7, 1 is a ballast, 2 is a choke coil which is a main part of the ballast 1, 3 is a temperature fuse, 4 is a fluorescent lamp, and 5 is a glow starter. The protective cover A is formed by molding a weak elastic resin such as nylon, and is formed so as to completely cover the entire surface of the terminal block 6 when the terminal block 6 is assembled. Then, on both sides, a claw 7 is formed so as to be locked to both ends of the terminal block 6, and a cut groove 8 is formed so as to facilitate the combination. B is a bobbin made of resin or the like, which is composed of a collar 10 having an opening 9 and a terminal block 6 in which the respective terminal portions 11, 12 and 13 are arranged. Brass lugs 22, 23, and 24 are inserted into the terminals of 11, 12, and 13, respectively, and the ends of the copper wires are welded with the solder 21. 3 is a thermal fuse 3 having a leaf spring-shaped contact piece 15 made of phosphor bronze set so as to melt at a specified temperature. Is pressed against the upper surface of the solder 21. Reference numeral 17 is a tongue for constantly pressing the thermal fuse 3 to the side surface of the winding wire 18 at a constant pressure, and 19 is an opening for the lead wire 20.

[Effect of device]

 The present invention is configured as described above and has the following effects. Since the thermal fuse is held in the protective cover and the protective cover is integrated with the terminal block in the final process of all work processes, work is performed without being aware of temperature fuses in all processes such as the manufacturing of the ballast body and inspection process. Therefore, the workability does not deteriorate. Since the protective cover covers the entire terminal area, it is possible to prevent the risk of contact electric shock, etc., and the temperature fuse is held inside, and the sensing surface of the temperature fuse is directly pressed against the side surface of the winding to increase the temperature. Can be accurately sensed.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a fluorescent lamp lighting circuit.

FIG. 2 is a partial sectional perspective view of a protective cover showing an embodiment according to the present invention.

FIG. 3 is a front view of a protective cover showing an embodiment according to the present invention.

FIG. 4 is a side view of a protective cover showing an embodiment according to the present invention.

FIG. 5 is a perspective view of a coil device according to the present invention.

FIG. 6 is a side view in which a part of a coil device and a protective cover according to the present invention are shown in section.

[Explanation of symbols]

 A protective cover B bobbin 1 ballast 2 choke coil 3 temperature fuse 4 fluorescent lamp 5 glow starter 6 terminal block 7 claw 8 kerf 9 opening 10 collar 11, 12, 13 terminal 15 contact piece 16 holding plate 17 tongue piece 18 Winding 19 Opening 20 Exit wire 21 Solder 22, 23, 24 Lug

Claims (1)

[Scope of utility model registration request] 1. A terminal block (6) of a bobbin (B) having an opening (9) formed in a part of a collar (10), and an elastic plate contact piece (1).
The protective cover (A) sandwiching the thermal fuse (3) having 5) inside is constructed so that the temperature sensing surface of the thermal fuse (3) is in direct contact with the side surface of the winding (18) when combined. A protective device for the ballast (1) characterized.