JPH0439321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a hair setting device such as a hair iron or a hair dryer.

[Background technology]

This type of hair set device is comprised of a housing containing a power source and an attachment that is detachably attached to the housing, and the attachment includes a heater disposed on a winding drum. There is a demand for a hair set device that is portable and easy to use and uses a low output power source such as a battery.
Since the amount of heat necessary for curling hair cannot be obtained, a device is provided in which a resistance element constituting a heater is exposed on the outer periphery of the winding drum.

Figure 11 shows a cross-sectional view of attachment A',
Resistance elements 12' having a substantially U-shaped elongated cross section are exposed on the outer circumferential surface of the cylindrical winding drum 7' and arranged in an annular manner in the circumferential direction. are connected to form a heater 4'. In addition, the outer circumferential diameter of the winding drum 7' with which the hair comes into contact is set so that the heater 4'
However, as shown in FIG. 11, when a metal such as a hairpin 18 comes into contact with the resistor element 12' between the two poles of the power supply,
There was a problem in that if it came into contact with the electrode, it would cause a short circuit between the electrodes, making it unusable. Incidentally, the heater 4' is supported and fixed by a pressing plate member 19 such as a blitzle. In addition, in order to reduce the heat loss of the heater 4', the contact portions with the winding drum 7' that receive the heater 4' are on both sides of each resistance element 12', and a recess 20 is formed in the winding drum 7'. There is no contact. However, as shown in FIG. 11, when an external force F is applied to the portion of the resistance element 12' corresponding to the recess 20, there is a problem in that the resistance element 12' is likely to be deformed such as a dent.

[Purpose of the invention]

The present invention has been provided in view of the above-mentioned points, and it is an object of the present invention to provide a hair setter that can be used safely without causing a short circuit in the resistance element even when a metal such as a hairpin comes into contact with the winding drum. The purpose is to

[Disclosure of the invention]

(Structure) In the present invention, a radius larger than the radius of the winding drum on the surface of the resistance element is formed on the surface of the winding drum between a pair of resistance elements connected to both poles of a power source among a plurality of resistance elements. This is characterized in that a protrusion is provided to prevent a short circuit between the resistance elements even if a metal such as a hairpin comes into contact with the protrusion.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 3 is a diagram showing the appearance of the hair setter,
The hair setter according to the present invention basically consists of a housing 1 and an attachment A. Hair is wound around the winding drum 7 of the attachment A, and the hair holding plate is rotatably supported to hold the wound hair. 2 and heats the hair by energizing the heater 4 disposed on the winding drum 7, thereby giving the hair a curl. The winding drum 7 made of an insulating material is formed into a cylindrical shape, and grooves 11 are cut in the surface thereof in the same direction as the axial direction of the winding drum 7 for arranging both sides of the resistance element 12. The heater 4 disposed on the surface of the winding drum 7 is formed in a shape in which a plurality of resistance elements 12 each formed in an elongated shape are electrically connected via a connecting piece 13 as shown in FIG. At the same time, the resistive elements 12 are arranged so as to be spaced apart from each other in the circumferential direction of the winding drum 7 and exposed on the outer surface of the winding drum 7. Also, as shown in Figure 4,
The hair set device has an attachment A detachably attached to one end in the axial direction of a generally cylindrical housing 1 containing a secondary battery 6, etc., and the attachment A is connected to the secondary battery 6 as a power source. The heater 4 that generates heat is arranged as described above. The power supply path from the secondary battery 6 to the heater 4 is as follows. That is, the secondary battery 6 is connected to the pin socket 9, the pin plug 10, and the resistance element 12 of the pin plug 10 via the power on/off switch 8.
Power is supplied to the heater 4 welded to both ends of the heater. Further, both ends of the heater 4 are fixed by an end cap 3 and a tip cap 5. FIG. 2 shows a sectional view of the winding drum 7, and shows resistance elements 12a, 12 at both ends.
b is connected to both poles of the power source, and a protrusion 21 is integrally provided on the surface of the winding drum 7 between the two poles (resistance elements 12a, 12b), and the protrusion 21 is formed on the winding drum 7. The diameter of the hair contacting outer circumferential surface is made larger than the outer circumferential diameter of the heater 4. Further, as shown in FIG. 5, fixing pieces 16 for preventing floating are formed at the tips of the legs on both sides of the substantially central portion of each resistance element 12 of the heater 4. On the other hand, a groove 11 provided in the axial direction of the winding drum 7
A hooking groove 17 for hooking and inserting the fixing piece 16 is formed in the same direction as the axial direction of the winding drum 7 at the back of the bottom. Further, the contact portion between the heater 4 and the winding drum 7 is the center portion of the resistive element 12, and both side portions of the resistive element 12 have a non-contact structure. Furthermore, as shown in FIG. 1, even if the hairpin 18 tries to contact the resistance elements 12a and 12b between the two poles of the power source, the protrusion 21 is formed protruding between the resistance elements 12a and 12b. , hairpin 18
The hairpins 18 do not come into contact with the resistive elements 12a and 12b at the same time because they come into contact with the protrusion 21 and are lifted up, so that there is no short circuit between the two poles of the power supply. Further, as shown in FIG. 4, the tip of the hair holding plate 2 is in contact with the surface of the tip cap 5.
There is a gap H of about 0.5m between the
, thereby ensuring an insulating distance between the hair holding plate 2 and the resistance element 12.

FIG. 5 is a configuration diagram of the heater 4, which is formed by punching out a thin plate of a relatively high-resistance material such as a nickel-chromium alloy, and includes a resistive element 12 that generates heat when energized. The ends are connected in series by a connecting piece 13, and a resistive element 12c disposed next to the resistive elements 12a and 12b at both ends of the heater 4 is not electrically connected. Pin plugs 10 are directly welded to both ends of the heater 4 by spot welding or the like. In addition, a fixing piece 1 is provided to prevent the central part of the heater 4 from floating.
6 is formed symmetrically with respect to the center by shifting its position for each resistor element 12. The hair holding plate 2 is the second
As shown in the figure, resistance elements 12 at both poles of the heater 4
a, 12b, and adjacent to the dummy resistance element 12c. FIG. 6 shows an electrical wiring diagram of the hair setter, and the connector section 7 between the heater 4 and the battery 6 is composed of the above-mentioned pin socket 9 and pin plug 10.

7 and 8 show a state in which the heater 4 is assembled into the winding drum 7, and the heater 4 is slid in the axial direction and assembled into the winding drum 7. That is, both sides of each resistance element 12 of the heater 4 are inserted into the groove 11 of the winding drum 7, and the fixing piece 16 of the resistance element 12 is inserted into the hook groove 17 for hook engagement. The heater 4 is fixed to the winding drum 7 by the end cap 3 and tip cap 5. At this time, the fixed pieces 1 at the tips of the legs on both sides of the resistance element 12
By arranging the fixing pieces 6 in a staggered manner for each resistor element 12, the fixing pieces 16 can be easily inserted into the winding drum 7 in sequence compared to a case where all the fixing pieces 16 are in the same position, resulting in better assembly efficiency. . In addition, a fixing piece 16 is provided at the end of the leg at the approximate center of each resistance element 12 of the heater 4, and the fixing piece 16 is engaged with a hook groove 17 formed in the winding drum 7 to fix the brittle. This eliminates the need for holding plate members such as, and improves cost and ease of assembly. Further, as shown in FIG. 2, the width of the groove 11 is made relatively wide to reduce the heat loss of the heater 4 to form a space 22, and the center of the resistive element 12 itself is located in the space. Although both sides of the resistance element 12 are in contact with the surface of the winding drum 7 between the spaces 22 and are not in contact with each other in the space 22, even if an external force F is applied to this part, the resistance element 1
Because it is almost Z-shaped on both sides of 2,
The resistance element 12 is strong in terms of strength and is less likely to be deformed by denting or the like due to external force.

9 and 10 show measurement points and graphs of the measurement results for investigating the temperature distribution in the circumferential direction of the winding drum 7. As shown in FIG. The measurement points up to the element 12a are designated as 1 to 1. FIG. 10 shows the measured temperatures from A to I, and as shown by a straight line P, the temperatures are almost straight and uniform. This is because the dummy resistance element 12c, which is not electrically connected, is placed next to the resistance elements 12a and 12b connected to both pole terminals of the power supply, as described above, and therefore The temperature distribution between the resistive elements 12 disposed in the windings is made uniform, giving the user a satisfactory curl. still,
Curve Q is the case where all the resistance elements 12 are connected to a power source and generated heat, and the temperature of the resistance elements 12 between the two poles of the power source tends to increase, making it impossible to obtain a uniform temperature distribution. .

〔Effect of the invention〕

As described above, the present invention provides a winding drum in which a plurality of elongated resistance elements are exposed on the outer circumferential surface of a winding drum having a substantially circular cross section and arranged annularly in the circumferential direction. In the hair setter, the radius of the winding trunk on the surface of the resistive element is set on the surface of the winding trunk between a pair of resistive elements connected to both poles of the power supply among the plurality of resistive elements. Since there is a protrusion on the surface of the winding drum that forms a radius larger than that of the winding drum, even if a metal object such as a hairpin comes into contact with the winding drum, the protrusion will lift the hairpin and prevent it from reaching both poles of the power supply. This has the effect that it can be used safely without causing short circuits between connected resistance elements.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the hairpin according to the embodiment of the present invention in contact with the winding drum, Fig. 2 is a cross-sectional view of the above-mentioned winding drum, and Fig. 3 is a perspective view showing the entire hair setter as above. Figure 4 is a sectional view of the main parts of the same as above, Figure 5 a is a plan view showing the expanded state of the heater of the same, Figure 5 b is a view taken along the X arrow in Figure 5 a of the above, and Figure 6 7 and 8 are diagrams showing the assembled state of the heater and the winding drum, FIG. 9 is a sectional view of the winding drum showing the temperature measurement points, and FIG. This figure shows the temperature distribution in the circumferential direction of the winding drum, and FIG. 11 is a sectional view of the conventional example. 2 is a hair holding plate, 7 is a winding drum, 12 is a resistance element,
16 is a fixing piece, 17 is a hooking groove, 21 is a protrusion,
22 indicates a space.

Claims (1)

[Scope of Claims] 1. A winding drum in which a plurality of elongated resistance elements are exposed on the outer peripheral surface of a winding drum having a substantially circular cross section and arranged annularly in the circumferential direction, in which the resistance elements are arranged. In the hair setter which is configured to wrap the hair around the hair to create curly curls, a winding drum surface between a pair of resistive elements connected to both poles of the power supply among the plurality of resistive elements,
A hair setter characterized in that a protrusion is provided on the surface of the winding drum to form a radius larger than the radius of the winding drum on the surface of the resistive element. 2. The resistance element has a U-shaped cross section and a fixing piece is provided at the tip of the leg, and the fixing piece is slid into a hook groove formed in the winding drum to fix the resistance element to the winding drum. A hair set device according to claim 1. 3. The hair set device according to claim 2, wherein the fixing pieces are arranged in a shifted manner for each of the plurality of resistance elements. 4. The hair setter according to claim 1, wherein a space is formed between both sides of the resistive element and the winding drum.