JPH0938399A - Iron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat conductivity between a heat accumulator and an iron base by constituting the heat accumulator used in a heat accumulating iron by housing a heat accumulating material in a metal heat accumulating container. SOLUTION: An iron equipped with a base 1, the heater 11 attached to the base 1, the temp. detection element 16 arranged on the base 1 to detect the temp. of the base, the temp. excessive rise preventing device 20 arranged on the base 1 and the attaching jig fixed to the base 1 so as to hold the temp. excessive rise preventing device 20 and the temp. detection element 16.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an iron.

[0002]

2. Description of the Related Art A conventional iron is disclosed, for example, in JP-A-4-22.
No. 7300. According to this publication,
A heater is mounted on the base, a thermistor for detecting the temperature of the base is provided, and a thermal fuse is mounted on the base. In this way, in the unlikely event that the thermistor breaks down, a temperature fuse is provided as a safety device to prevent an abnormal temperature rise of the base.

[0003]

However, in the above-mentioned iron, since it is necessary to provide a fixture for attaching the thermal fuse to the base, the cost becomes high, and the thermal fuse is mounted in a narrow area, which makes it difficult to assemble. There is one drawback. Furthermore, since the thermal fuse is installed in a narrow area,
There is a second drawback in that the thermal fuse is not securely fixed to the base because the work is difficult.

The thermal fuse usually has a third defect that it cannot detect the temperature of the base with high sensitivity because the tube is usually inserted and fixed to the base. Further, as described above, since the thermal fuse cannot be securely fixed to the base, the mounting position of the thermal fuse varies and it is difficult to secure the insulation distance between the thermal fuse and the heater. Therefore, in consideration of such conventional drawbacks, the present invention makes it easy to assemble the safety device, can fix the safety device in close contact with the base, has a high temperature detection sensitivity by the safety device, and has an insulation distance between the safety device and the heater. It is an object of the present invention to provide an iron that can accurately maintain the iron.

[0005]

In order to solve the above-mentioned problems, the present invention provides a base, a heater attached to the base, a temperature detecting element arranged on the base for detecting the temperature of the base, and a base. It is provided with an overheat protector arranged above and a fixture fixed to the base so as to hold the overheat protector and the temperature detecting element.

In the present invention, it is desirable that the disposition direction of both terminals formed on the overheat protector is substantially parallel to the disposition direction of the heater, and that the mounting tool is at a temperature range substantially orthogonal to the disposition direction of both terminals. It has a strip portion that presses the upper surface of the rise prevention device.

Further, according to the present invention, preferably, the position where the fixture is fixed to the base is provided in front of the position where the overheat protector is held by the fixture.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
3 through FIG. 1 is a side sectional view of an iron according to the present embodiment, FIG. 2 is a plan view of the iron base and components attached thereto, and FIG. 3 is AA of FIG.
It is sectional drawing.

In these figures, the base 1 is made of, for example, an aluminum die-cast product, and is substantially U when viewed from above.
The storage portion 2 for the heater is formed in a letter shape. The base 1 has a steam chamber 3 and a steam hole 4 connected to the steam chamber 3.
And a vaporization chamber 5 is formed. Further, the base 1 is provided with mounting holes 6, 7, 8, 9 and a boss 10.

The heater 11 is embedded in the housing 2 of the base 1, and one terminal 12 and the other terminal 13 are attached to both terminals 11 of the heater 11.

The temperature sensing assembly 14 has a first lead 15
A temperature detecting element 16 (for example, a thermistor or the like) connected to it, and a second lead wire 1 connected to it.
7 and. And the temperature detection element 1 located in front
A first tube 18 made of, for example, silicon is inserted near the tips of the first and second lead wires 15 and 6 and near the tips of the second lead wires 17. A second tube 19 made of, for example, a heat-resistant material is inserted into the first lead wire 15 and the second lead wire 17 located rearward. The temperature detecting element 16 is arranged so as to be located on the first mounting surface 1 a of the base 1 via the first tube 18.

In the overheat protector 20, a bimetal plate 22 is provided on a bottom plate 21 made of a metal plate, and a shaft 23 is provided so as to abut substantially the center of the bimetal plate 22.
A support tool 24 for supporting 3 is provided. The spring 25 contacts the upper end of the shaft 23, the spring 25 is attached to the base 26, and the first contact 27 is attached to the tip of the spring 25.
The contacts 28 are attached to the base 26.

One terminal 29 is provided on the upper surface of the overheat protector 20.
And another terminal 30 is provided, and is electrically connected to the first contact 27 and the second contact 28, respectively. The overheat protector 20 is arranged so as to be located on the second mounting surface 1b of the base 1. In this way, the base 1 is partially formed in a stepped shape so that the second mounting surface 1b of the base 1 is positioned lower than the first mounting surface 1a.

The fixture 31 is made of, for example, an iron plate, and is fixed to the hole 9 of the base 1 with a screw 32 so as to hold the temperature detecting element 16 and the overheat protector 20 on the base 1. The fixture 31 is positioned by inserting the boss 10 of the base 1 into the hole 33 formed in the fixture 31.

In a direction substantially orthogonal to the arrangement direction of both terminals 29, 30 of the overheat protector 20, the fitting 31 presses the upper surface of the overheat protector 20 so that the fitting parts 34, 35 are attached.
Is provided. As shown in FIG. 3, the mounting portions 34 and 35 are formed in a substantially L shape, and the side surfaces of the mounting portions 34 and 35 guide the side surface of the overheat prevention device 20, and the overheat protection device 20 rotates. This is formed so that the upper surfaces of the mounting portions 34 and 35 press the upper surface of the overheat protector 20.

In this way, by pressing the upper surface of the overheat protector 20 with the mounting portions 34 and 35, the overheat protector 20 is pressed.
Can be in close contact with the base 1. Further, by pressing with the mounting portions 34 and 35, the overheat protector 20 does not shift in the circumferential direction, so that the insulation distance between the terminals 29 and 30 of the overheat protector 20 and the mounting portions 34 and 35 is reduced. Easy to maintain a predetermined value.

Further, the attachment 31 has a holding portion 36 formed in a substantially rectangular tube shape in the extending direction of the attachment portion 35.
In the holding portion 36, the first lead wire 15 and the second lead wire 17 of the temperature detecting assembly 14 and the second tube 1 are provided.
9 has been inserted. By thus inserting the temperature detecting assembly 14 into the holding portion 36, the temperature detecting assembly 14 can maintain a predetermined height with respect to the base 1. As a result, the temperature detecting element 16 provided at the tip of the temperature detecting assembly 14 is securely connected to the base 1 via the first tube 18.
Can be closely attached to the first mounting surface 1a.

One terminal 29 of the overheat protector 20 is fixed to the connecting piece 37 by welding or the like, and the other end of the connecting piece 37 is fixed to the one terminal 12 of the heater 11 by welding or the like. The other terminal 30 of the overheat protector 20 is soldered to the lead wire 38.

Thus, both terminals 2 of the overheat protector 20 are
The arrangement direction of 9 and 30 is provided substantially parallel to the arrangement direction of the heater 11, so that both terminals 29 and 30 and the heater 11 are arranged.
(In other words, a sufficient insulation distance from the storage part 2) can be secured.

The position where the fitting 31 is fixed to the base 1 (that is, the position of the screw 32) is more than the position where the overheat protector 20 is held by the fitting 31 (that is, the positions of the mounting portions 34 and 35). Is also located in front. With this arrangement, even if a rearward tension is applied to the lead wire 38, since there is a fixed point in front of the overheat protector 20, the front of the overheat protector 20 is unlikely to float, and the overheat protector is prevented. The preventer 20 can be fixed in close contact with the base 1.

Further, the position where the fixture 31 is fixed to the base 1 (that is, the position of the screw 32) is the same as the position where the overheat protector 20 is held by the fixture 31 (that is, the positions of the attachment portions 34 and 35). The temperature detecting element 16 is provided substantially in the middle of the position where it is held by the base 1.

By arranging in this way, as a result of fixing with the screw 32, the mounting force of the overheat protector 20 to the base 1 and the mounting force of the temperature detecting element 16 to the base 1 become substantially the same. As a result, the overheat protector 20 and the temperature detection element 16 can be fixed to the base 1 in close contact with each other.

The cover 39 is arranged above the base 1,
It is fixed to the holes 6, 7, and 8 of the base 1 by screws 40 and the like. The handle body 41 is arranged above the cover 39, and the handle body 41 and the cover 39 are fixed by screws 42 or the like.

The tank 43 is detachably mounted between the upper surface of the front side of the cover 39 and the front surface of the handle body 41, and the pouring / draining hole 4
4 and a slide cover 45 for opening and closing it and a normally closed valve device 4
6 and the like.

The switching button 47 is provided in the uppermost part of the upper part of the handle body 41 so as to be vertically movable, and switches to steam or dry. The opening / closing device 48 operates the normally closed valve device 46 according to the vertical movement of the switching button 47.
When is pressed, the normally closed valve device 46 is opened, the water in the tank 43 is vaporized in the vaporization chamber 5, and steam is discharged through the steam chamber 3 and the steam hole 4.

The back cover 49 is attached to the handle body 4 with screws 50 or the like.
1, a power supply pin 51 is provided that is connected to a power supply unit (not shown) provided on the mounting table. The iron 52 according to the present embodiment is configured by these components.

Next, the operation of the iron 52 is again shown in FIG.
3 through FIG. First, when the iron 52 is mounted on the mounting table, the iron 52 is powered on via the power supply pin 51. When the operating switch (not shown) is operated to select the set temperature corresponding to the fabric, the temperature data of the base 1 detected by the temperature detecting assembly 14 is input to the control circuit (microcomputer or the like).

On one side of the commercial power supply is a lead wire 38,
The other terminal 30, the one terminal 29, the connection piece 37, the one terminal 12, the heater 11, and the other terminal 13 are electrically connected to the other side of the commercial power supply. The heater 11 is controlled by the control circuit.

In this way, the heater 11 is turned on and the base 1
The temperature of the base 1 gradually increases, and the temperature of the base 1 reaches the set temperature. As a result, the temperature data from the temperature sensing assembly 14 matches the temperature setting data of the control circuit, and the control circuit turns off the heater 11. In this way, the temperature control of the base 1 is performed.

However, if the temperature sensing assembly 14 breaks down and the temperature of the base 1 exceeds the set temperature, the overheat protector 20 operates to turn off the heater 11.

[0031]

As described above, according to the present invention, since the fixture for integrally holding both the overheat protector and the temperature detecting element is fixed to the base, the overheat protector as in the prior art. Easy to assemble because no special fixture is required. Also, since both integrated parts are mounted on the base, they can be securely fixed even in a narrow mounting area, and the overheat protector can be fixed in close contact with the base. Further, unlike the temperature fuse that detects the temperature of the base through the tube that is inserted, the overheat protector is fixed directly on the base, so the temperature detection sensitivity is high.

In the present invention, it is desirable that the direction of both terminals formed on the overheat protector is substantially parallel to the arrangement direction of the heater, so that the insulation distance between both terminals and the heater can be easily maintained. Further, since the mounting portion for pressing the upper surface of the overheat protector is provided substantially orthogonal to both terminals of the overheat protector, a sufficient insulation distance between the mounting portion and both terminals can be secured.

Since the lead wire connected to the terminal of the overheat protector is normally connected to the circuit board located at the rear, the lead wire is likely to be applied with the tension in the rearward direction. However, according to the present invention, since there is a fixing point of a fixture in front of the lead wire, even if a rearward tension is applied to the lead wire, the overheat protector is hard to separate from the base and sticks to the base. Fixed.

[Brief description of drawings]

FIG. 1 is a side sectional view of an iron according to an embodiment of the present invention.

FIG. 2 is a plan view of the base of the iron and the components attached thereto.

FIG. 3 is a sectional view taken along the line AA of FIG. 2;

[Explanation of symbols]

 1 Base 11 Heater 16 Temperature Detection Element 20 Overheat Prevention Device

Claims (3)

[Claims] 1. A base, a heater attached to the base, a temperature detecting element arranged on the base and detecting the temperature of the base, and an overheat protector arranged on the base. An iron, comprising: an overheat protector and a fixture fixed to the base so as to hold the temperature detecting element. 2. An arrangement direction of both terminals formed in the overheat preventive device is substantially parallel to an arrangement direction of the heater, and the mounting tool is arranged so as to be substantially perpendicular to the arrangement direction of the both terminals. The iron according to claim 1, further comprising a strip portion that presses an upper surface of the rise prevention device. 3. The iron according to claim 1, wherein a position where the fixture is fixed to the base is located in front of a position where the overheat protector is held by the fixture.