JPH03247397A - Cordless iron - Google Patents

Abstract

PURPOSE:To allow accurate temperature control without necessity of transmitting a very small signal such as temperature signal, etc., to a stand side by providing a temperature detecting means, a temperature setting means, and an energization control means to a heater on an iron body side. CONSTITUTION:A connection detecting means 33 detects voltage of powder circuit 27 and voltage of commercial power source AC, and detects that an iron body 1 is placed on. A temperature setting means 29 receives this detected output and reads the content of a memory means 31. The means 29 sets temperature based on the contact if the memory stored any temperature setting, but otherwise it selects temperature setting 'off', previously decided. A temperature control means 30 compares the output from temperature detecting means 28 with the output from the temperature setting means 29, and controls energization of a heater 3 by turning on or off a relay 15. When the iron body 1 is removed from a stand 20, the connection detecting means 33 stops producing output. As a result, the temperature setting means 29 inhibits input from a temperature setting switch 10, and stops an indicating means 32.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a cordless iron.

(B) Conventional technology Conventional cordless irons are configured to control the temperature using a thermostat. Cordless irons, which require a large amount of power to heat up in a short period of time, have a large temperature error, which can cause overheating of fabrics. There is a problem of damaging the

Therefore, it is known to reduce the temperature error by using an electronic circuit such as a microcomputer for temperature control (for example, Japanese Patent Application Laid-Open No. 64-58300). However, with conventional irons, a heat-sensitive element is provided as a temperature detection means on the iron body side, and a temperature setting means and a temperature control means are provided on the stand side, so weak signals such as temperature signals are transmitted between the iron body and the stand. There is a need to. However, in order to reliably transmit the above-mentioned weak signal, there is a problem that the circuit configuration and adjustment work become complicated, or an error occurs in the detected temperature.

(c) Sections to be Solved by the Invention The present invention solves the above problems and provides a cordless iron with small temperature errors and high reliability. Additionally, ironing prevents the temperature setting from changing inside.

(D) Means for Solving the Problems The present invention provides a base heated by a heater, a temperature detection means for detecting the temperature of the base, a temperature setting means for setting the temperature of the base, the temperature detection means and the temperature The iron body includes a heating control means for controlling energization of the heater according to the output of the setting means, an iron body having a power receiving terminal, and a stand having a power feeding terminal connected to the power receiving terminal when the iron body is placed. be.

(E) Function The cordless iron of the present invention is provided with temperature detection means, temperature setting means, and heating control means in the iron body as described above, so that weak signals such as temperature signals are transmitted through terminals whose contact state is not stable. There is no need to transmit the temperature to the stand, increasing reliability, and keeping the temperature error at the base smaller than with a thermostatic type, preventing fabric damage.

(f) Examples Examples of the present invention will be described below with reference to the drawings. In the figure, (1) is the iron body, (2) is the base with the heater (3) embedded in it, (4) is the thermistor that detects the temperature of the base (3), (5) is the removable water tank, and (6) is It is a handle body. (7) is a hollow grip part integrally formed with the handle body (6), and a control board (8) is disposed therein. (9) is a microcomputer that constitutes each means described later, (10) is a temperature setting switch, (11) is an LED driver, (12) is a monitor lamp that informs the usage time of the ironing machine, and each is attached to the board (8). installed. The temperature setting switch (10) is closed by pressing down the operation part (13) located at the upper surface of the grip part (7) at the approximate center. (LL)
(L2) (L3) (L4) are LEDs that display temperature settings
The lamps are arranged in the order of "high", "medium", "low", and "off" from the front, and are provided facing the upper surface of the grip (7). (14) is a button for switching between steam and dry. (15) is a power supply board to which a relay (16) and the like are attached, and is attached to the rear space of the handle body (6). (1
7) is a rear lid, which has a recess (18) formed in its lower part. (
19) (19) is a power receiving terminal provided in this recess (18), and is connected to the power supply board (15).

(20) is a stand that tilts and supports the iron body (1), (21) is a support arm that the bottom of the base (2) comes into contact with, and (22) is a convex part that engages with the four parts (18) of the rear lid. It is. (23) (23) is a power supply terminal that connects to the power receiving terminal (19) (19) inserted through the opening of the convex portion (22);
(24) is the opening of the convex part (22) of the iron body (1).
) is a shutter that closes when it leaves the stand (20). (25) is a cord reel that supplies commercial power to the power supply terminals (23) (23).

Next, the circuit configuration will be explained with reference to FIG. 2. (
26) is a microcomputer (9) installed on the control board (8).
), and operates by receiving DC voltage from the power supply circuit (27). control unit) In (26), (28) is a temperature detection means for detecting the temperature of the base (2) based on a change in the resistance value of the thermistor (4), (29)
is turned off based on the input of the temperature setting switch (10) →
Temperature setting means (30) sets the temperature of the base (2) in the order of "High" → "Medium" → "Low" → "Off";
29) and the temperature detection means (
Temperature control means for comparing the base temperatures detected by 28) and turning on and off the relay (16) to energize the heater (3) so that they match; (31) for temperature setting means (29); A storage means (32) stores temperature setting information set by the temperature setting means (29) and displays the temperature setting information set by the temperature setting means (29) through LED lamps (Ll) (L2) (L).
3) LE that displays one of (L4) by blinking or lighting
Temperature setting display means composed of a D driver (11) etc.;
(33) is the voltage of the power supply circuit (27) and the commercial power supply (AC
) monitors the voltage of the iron body (1) and the stand (2).
0). The storage means (31) is an internal RAM of the microcomputer (9).
, or an external RAM or the like, but a nonvolatile memory or the like may also be used.

(C) is a backup capacitor for the storage means (31), (R) is a resistance for adjusting storage time, and (D) is a backflow prevention diode. Capacitor (C) and resistor (R
) is set so that when the iron body (1) is detached, the memory contents of the storage means (31) made up of non-volatile memory can be retained for about 10 minutes, which is longer than the normal usage time of the iron. . In addition, the power supply circuit (27) is connected to the control unit (26) for a predetermined period of time after the iron body (1) is removed.
guarantee the operation.

Next, the operation in the above configuration will be explained.

First, the iron body (1) is placed on the stand (20), and the power receiving terminals (19) (19) and the power supply terminal (23823)
) comes in contact with the control unit) from the power supply circuit (27).
(26) is supplied with power. Connection state detection means (33)
detects the voltage of the power supply circuit (27) and the voltage of the commercial power supply (AC) to detect that the iron body (1) is placed.

Upon receiving this detection output, the temperature setting means (29) reads the memory contents of the storage means (31), and if there is memory of the temperature setting, it sets the temperature based on the content, and if there is no memory, it sets the temperature in advance. Select “Off”. The temperature setting display means (32) displays one of the LED lamps blinking. Here, assume that the temperature setting is "off". next,
By pressing down the operation part (13), the temperature setting switch (10
) closes, the temperature setting changes to "high" and the LED lamp (Ll) flashes. The temperature control means (30) compares the output of the temperature detection means (28) and the output of the temperature setting means (29), and turns on/off the relay (15) to control the heater (3).
The temperature of the base (2) is maintained at a predetermined temperature according to "high" by controlling the power supply/disconnection to the base (2). When the temperature of the base (2) reaches an appropriate temperature, an LED lamp (Ll) is turned on to notify that the temperature has become suitable for ironing.

When the iron body (1) is removed from the stand (20), the output of the connection state detection means (33) stops, and in response, the temperature setting means (29) prohibits input from the temperature setting switch (10). At the same time, the display by the display means (32) is stopped. Further, the temperature setting contents ([High J) are written into the storage means (31). The power supply circuit (27) guarantees operation at least during this period. In this state, the temperature setting does not change even if the operating section (13) is pressed. In particular, when the grip part (7) is provided with a temperature setting operation part (13), the temperature setting may change if your fingers accidentally touch the operation part (13) while ironing. Since input from the temperature setting switch (10) is prohibited inside the hook, erroneous changes in temperature setting can be prevented. Moreover, since the temperature setting display by the LED lamp is also stopped at the same time during the ironing process, it is possible to notify the user that the temperature setting is prohibited. The period during which ironing can be done is notified by lighting the monitor lamp (12) by a circuit not shown. The contents of the storage means (31) are retained for about 10 minutes by the capacitor (C).

When the iron body (1) is placed on the stand (20) again, the control unit (26) is energized and the temperature setting means (26) is energized.
29) receives the output of the connection state detection means (33) and reads out the contents of the storage means (31). Then, according to the content, for example, if "high" is stored, the temperature setting is set to "r high" and the display of the LED lamp (Ll) is restarted.

In this state, input from the temperature setting switch (10) becomes possible, and the temperature setting can be changed.

When the iron main body (1) is removed and left for a long time, the voltage of the capacitor (C) decreases and the stored contents of the storage means (31) are erased in about 10 minutes. After that, when the iron body (1) is placed on the stand (20), the temperature setting means (29) has no memory in the storage means (31).
A preset temperature setting is set to "off" to prevent a situation in which the heater (3) is energized without permission even though temperature setting is not performed.

In the above embodiment, when the iron body (1) is removed, power is not supplied from the power supply circuit (27) to the control unit (26) after a predetermined period of time (after the writing to the storage means (31), etc. is completed). The configuration is such that backup power is supplied from the capacitor (C) to the storage means (31), and a large capacity capacitor for backup is provided in the power supply circuit (27), so that the entire control unit (26) A configuration may also be adopted in which backup power is supplied to. Also, a battery can be used instead of the capacitor (C).

(g) Effects of the Invention As described above, according to the cordless iron of the present invention, since the iron body is provided with each of the temperature detection means, temperature setting means, and heater energization control means, weak signals such as temperature signals can be detected. It eliminates the need for a circuit configuration to transmit the temperature to the stand side, prevents signal deterioration, and features accurate temperature detection.Especially for cordless irons that require a large amount of power to heat the base, By detecting the temperature, it is possible to reduce the temperature error of the base and prevent damage to the fabric. Also, since setting the temperature inside the ironing machine is prohibited, setting the temperature incorrectly during use can be prevented. Also, since the temperature setting is not displayed when the iron body is detached from the stand, you can easily see if there is a connection failure.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of a main part of a cordless iron showing an embodiment of the present invention, and FIG. 2 is a circuit diagram of the same embodiment. (1)...Iron body, (2)...Base, (3
)...Heater, (19) (19)...Power receiving terminal, (
20)...Stand, (23)(23)...Power supply terminal, (28)...Temperature detection means, (29)...Temperature setting means, (30)...Temperature control means, ( 31)...Storage means, (32)...Temperature setting display means.

Claims (7)

[Claims] (1) A base heated by a heater, a temperature detection means for detecting the temperature of the base, a temperature setting means for setting the temperature of the base, and controlling energization of the heater according to the outputs of the temperature detection means and the temperature setting means. What is claimed is: 1. A cordless iron comprising: a temperature control means for controlling the iron body; an iron body having a power receiving terminal; and a stand having a power feeding terminal connected to the power receiving terminal when the iron body is placed on the iron body. (2) The cordless iron according to claim 1, wherein the temperature setting means prohibits temperature setting when the iron main body is detached from the stand. (3) The iron main body is provided with a storage means for storing setting information on the temperature set by the temperature setting means, and the storage means retains the setting information while the iron main body is removed. A cordless iron according to claim 1. (4) The cordless iron according to claim 3, wherein the temperature setting means sets a predetermined temperature when no temperature setting information is stored in the storage means. (5) The cordless iron according to claim 4, wherein the predetermined temperature setting is "off". (6) The iron body is provided with temperature setting display means for displaying temperature setting contents, and the display means stops displaying when the iron body is detached from the stand. Cordless iron listed in Scope 1. (7) The cordless iron according to claim 1, wherein the temperature setting means includes a setting operation section provided in a grip section of the iron main body.