JPH0141363Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heater for a hair dryer.

Generally, in order to ensure safety, hair dryers are equipped with a thermoswitch that detects an abnormal temperature rise in the heater and cuts off the power to the heater. The contacts are opened and closed by operating a movable contact plate formed of
The impact plastically deforms the movable contact plate beyond its elastic limit, leaving the contacts of the thermoswitch open, resulting in a problem that the hair dryer becomes unusable.

The present invention was developed in view of the above problems, and its purpose is to provide a hair dryer that prevents plastic deformation of the movable contact plate of the thermoswitch and reduces failures.

Embodiments of the present invention will be described below based on the drawings.
The casing of the hair dryer consists of a first casing 1 and a second casing 2 constituting a handle.The first casing 1 houses a heater 3 and has a discharge port 4 formed at its tip,
The casing 2 accommodates the switch 5 and has one end of the power cord 6 attached thereto, and the first and second casings 1 and 2 are rotatably overlapped at their respective ends and connected to each other at the connecting portion. A ventilation chamber 7 is formed, and a ventilation means consisting of a motor 8 and a fan 9 is housed in the ventilation chamber 7.

The heater 3 has a vertical substrate 10 and a horizontal substrate 11 assembled in a cross shape, and a wave-shaped heater wire 12 and a Siegel resistance wire 13 for reducing the voltage applied to the motor are wound around the outer periphery of the heater 3. Further, the horizontal substrate 1
A thermoswitch 14 is disposed at the front end of the heater wire 12 of No. 1 in the direction of air blowing (direction of arrow A in FIG. A projecting piece 16 is formed facing the movable contact plate 15 of the switch 14 in the air blowing direction, and a temperature fuse 17 is arranged at the rear end of the vertical board 10 so as to overlap with the Siegel resistance wire 13 in the air blowing direction. ing. As shown in FIG. 3, the thermoswitch 14 includes a movable contact plate 15 and a fixed contact plate 18 each made of a conductive spring material, with one end facing each other, and a bimetal 19 disposed below the movable contact plate 15. When the temperature exceeds a certain level, the contacts are reversed and open.

If the hair dryer is accidentally dropped from a high place, the movable contact plate 15 will be deformed by the impact of the fall as shown by the broken line in FIG.
Since the amount of deformation is limited during this process, the contact point is closed by restoring to its original state without undergoing plastic deformation.
Additionally, when the switch is turned off during use to cut off power to the heater and motor, the thermoswitch receives residual heat from the heater wire and opens the contacts, and it takes a long time for the thermoswitch to cool down and turn on the contacts. Since it takes time, there is a problem that the heater is not energized immediately even if the switch is turned on again. However, in the above embodiment, the thermo switch 1
4 and the heater wire 12 are arranged separately in the front and back of the air blowing direction, and during air blowing, the heater wire 12 is easily exposed to heat, increasing safety.In addition, the hair dryer can be operated by turning off the switch 5. When the thermoswitch 14 is stopped, the heater wire 12 receives less residual heat to prevent the contact of the thermoswitch 14 from opening inadvertently.

As described above, the present invention combines a vertical board and a horizontal board in a cross shape, winds a heater wire around the outer periphery, and installs a thermoswitch at one end in front of either the vertical board or the horizontal board in the air blowing direction. A protruding piece facing the movable contact plate of the thermoswitch is formed at the end of the other board in the air blowing direction, and the heater wire is arranged in a direction substantially perpendicular to the direction of the thermoswitch. Since it is placed on the rear side in the air blowing direction, even if it receives a fall impact, etc., the amount of deformation of the movable contact plate of the thermoswitch is limited by the protruding piece, preventing plastic deformation and preventing the hair dryer from becoming unusable. Since the thermoswitch is placed at a front position that is approximately perpendicular to the air blowing direction and separate from the heater, it receives the heat of the heater more easily during air blowing, making it easier to detect abnormal temperatures of the heater and making it safer. When the air blower is stopped, it is difficult to receive residual heat from the heater to prevent the thermoswitch contacts from opening inadvertently, and the thermoswitch is easy to assemble and install. Because it is oriented in the same direction, the wind does not get in the way of the flow.

[Brief explanation of the drawing]

Fig. 1 is a side view of a hair dryer showing an embodiment of the present invention, Fig. 2 is a perspective view of the same heater, and Fig. 3 is a side view of a hair dryer showing an embodiment of the present invention.
The figure is a front view of the heater same as above. 3...Heater, 10...Vertical board, 11...Horizontal board, 12...Heater wire, 14...Thermo switch, 15...Movable contact plate, 16...Protrusion piece.

Claims (1)

[Scope of utility model registration request] A vertical board and a horizontal board are assembled in a cross shape, and a heater wire is wound around the outer periphery of the board, and a thermoswitch is arranged at one end in front of the direction of air flow of either the vertical board or the horizontal board in a direction substantially perpendicular to the direction of air flow. At the same time, a protruding piece facing the movable contact plate of the thermoswitch is formed on the end of the other board in the air blowing direction, and the heater wire is arranged on the rear side of the thermoswitch in the air blowing direction. A hair dryer heater characterized by: