JPH0524150Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a heating device, and in particular, to a heating device that can be easily attached to an object to be heated and has improved heating efficiency.

[Prior art and problems to be solved]

Traditionally, ceramic heating devices have been used for rotary head decks such as video and rotary head digital audio tape recorders to remove dew that adheres to them.
PTC heaters are widely used.

These heaters are fixed around the object to be heated, that is, the magnetic recording/reproducing drum, by screws.

However, since the PTC heater made of ceramic is not flexible, there is a risk of damage when fixing it with screws, which requires nerves and requires a lot of effort to install. There was a problem.

In addition, a method has been proposed in which a heat sink is formed into a shape that matches the circumferential surface of the object to be heated, a PTC heater is embedded in the heat sink, and the heat is heated through the heat sink (1864 Publication No.).

However, since the heat generated from the PTC heater is transferred to the heat sink and the object to be heated is heated via the heat sink, there is a problem in that the heating efficiency is poor.

This invention solves the problems of the conventional devices as described above, and aims to provide a heating device that can be attached to an object to be heated very easily and has improved heating efficiency. .

[Means to solve the problem]

In order to achieve the above object, this invention has a heating heater having a self-temperature control function, an inner peripheral surface along the outer periphery of the heated object, the heated object can be located inside, and the heated a holder having a slit to which a heater can be attached, and a holder having a melting point higher than the maximum temperature of the heater, the heater being attached to the holder and having a portion on an inner circumferential surface of the holder; It has a configuration that forms a section.

[Effect]

By adopting the above-mentioned means, this idea
When installed by inserting the heating heater into the slit of the holder, this heating heater forms the inner peripheral surface of the holder, and it can be attached to the heated object by simply inserting the heated object into the holder. It is located opposite to the heating body without anything intervening therebetween.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

Figure 1 shows an embodiment of the heating device according to this invention, and this heating device is made of plastic.
It consists of a heating heater 1 made of a PTC thermistor, and a holder 2 to which the heating heater 1 is attached and which holds a heated object.

The heating element 1 includes a plastic heating element 3 obtained by adding conductive carbon such as graphite or carbon black to crystalline plastic, mixing the mixture uniformly, and then molding the mixture.
Electrodes made of copper foil, nickel foil, silver foil, etc. are bonded to the ends of this heating element 3, and lead wires 4, 4 are further connected to these electrodes with solder.

The holder 2 is made of a thermoplastic resin having a melting point higher than the maximum temperature of the heating heater 1, and has a cylindrical shape, and two places on the circumferential surface of the cylindrical part 5 are cut out from the other end to form openings. 6, 6 are formed, and furthermore, slits 7, 7 for receiving the heating heater 1 are formed in both wall portions forming the openings 6, 6, respectively.

When the heater 1 is attached to the holder 2, the openings 6, 6 of the holder 2
The ends of the heater 1 are inserted into the slits 7, 7 provided on both walls.

Then, the heater 1 is held with its both ends inserted into the slits 7, 7,
Furthermore, the inner surface of the heater 1 is held slightly outward from the inner circumferential surface of the cylindrical holder 2, thereby completing the assembly of the heating device.

When attaching the heating device assembled as described above to an object to be heated, the inner diameter of the cylindrical portion 5 of the holder 2 is approximately the same as or slightly smaller than the outer diameter of the non-rotating portion 10a of the magnetic recording/reproducing drum 10. form,
Moreover, by making the height lower than the non-rotating portion 10a, the non-rotating portion 10a of the magnetic recording/reproducing drum 10 can be reliably attached by simply pushing it into the holder 2 (see FIG. 2).

Therefore, the heating device can be attached to the object to be heated by simply pushing the non-rotating portion 10a of the magnetic recording/reproducing drum 10 into the holder 2 as described above, and it is possible to attach the heating device to the object to be heated using screws or the like as in conventional devices. The installation work can be carried out without much work, and after installation, the heating heater 1 maintains a small gap with the outer surface of the magnetic recording/reproducing drum 10.

FIG. 3 shows another embodiment of the heating device according to this invention. In the heating device shown in this embodiment, the heater 1 is the same as that shown in the previous embodiment, and the holder 12 is , has a cylindrical shape with one end closed, a part of the circumferential surface of this cylindrical part 15 is cut out from the other end side to form an opening 16, and the outside of the cylindrical part 15 is formed so as to cover the opening 16. The curved portion 18 is integrally provided with the cylindrical portion 15, and slits 17 are formed between the outer surface of the cylindrical portion 15 and the inner surface of the curved portion 18. An opening 19 is formed in the curved portion 18.

When the heater 1 is attached to the holder 12 configured as described above, both ends of the heater 1 are connected to the outer surface of the cylindrical portion 15 and the inner surface of the curved portion 18, respectively, as in the embodiment described above. When the heating heater 1 is inserted into the slits 17 formed between the slits 17, 17, the installation of the heating heater 1 to the holder 12 is completed, and the lead wires 4, 4 of the heating heater 1 are inserted outside through the opening 19 provided in the curved part 18. It's designed to lead you in the right direction.

Therefore, even with the heating device configured as described above, condensation formed on the heated object can be removed simply by positioning the heated object inside the holder, similar to the one shown in the above embodiment. It is something that can be done.

In both of the above embodiments, the shape of the holder is cylindrical in order to remove dew condensation occurring on the magnetic recording/reproducing drum, but the shape of the holder is determined depending on the shape of the object to be heated.

[Effect of idea]

By configuring this idea as described above,
The heater can be installed by simply inserting it into the slit of the holder, making assembly very easy. In addition, when installing it on the object to be heated, all you have to do is position the object in the holder. A heating device can be attached, significantly improving work efficiency.

Moreover, when the object to be heated is attached to the holder, since the heating heater forms part of the inner peripheral surface of the holder, the heating heater directly faces the object to be heated. This has the effect of greatly improving efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic exploded perspective view showing an embodiment of the heating device according to this invention, FIG. FIG. 3 is a schematic exploded perspective view showing another embodiment of the heating device according to this invention. 1... Heater, 2, 12... Holder,
3... Heating element, 4... Lead wire, 5, 15... Cylindrical portion, 6, 16, 19... Opening, 7, 17...
Slit, 10...Drum for magnetic recording and reproduction, 18
...Curved part.

Claims (1)

[Scope of utility model registration request] A heating heater 1 having a self-temperature control function,
It has an inner peripheral surface along the outer periphery of the heated object 10, in which the heated object 10 can be placed, and has slits 7, 17 to which the heating heater 1 can be attached, and further has slits 7, 17 to which the heating heater 1 can be attached. holder 2, 12 having a melting point higher than the maximum temperature of
A heating device characterized in that the heater 1 is attached to the holders 2 and 12 and forms a part of the inner peripheral surface of the holders 2 and 12.