JP2004301471A - Sheet-like warming tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the assembling of a control case easily performable. <P>SOLUTION: This sheet-like warming tool is composed of a main body 15 incorporating a heating element 12, a control circuit 4 for controlling a temperature of the heating element 12, a control case 8 including the control circuit 4 and mounted on an end part of the main body 15, and an operation knob 3 for switching on/off a power source and setting the temperature of the heating element 12. A groove part 17 is formed on an operation knob 3 sliding face side of the control case 8, and the operation knob 3 is provided with a projecting part 18 fitted to the groove part 17. Thereby, the operation knob 3 can be temporarily fixed to an upper control case 1 without using an additional component, and the assembling work can be easily performed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a planar heating device such as an electric carpet.
[0002]
[Prior art]
Conventionally, this type of planar heating device is generally configured as shown in FIG. 5 and provided with an operation knob. And many of them are arranged on the side (see Patent Document 1). FIG. 5 shows a control case of the conventional planar heating device described in the above-mentioned document 1. In FIG. 5, 1 is an upper control case, 2 is a lower control case, and 3 is an operation knob. The operation knob 3 is sandwiched between the upper control case 1 and the lower control case 2, and a connecting plate 7 for operating the knob 6 of the changeover switch 5 on the control circuit 4 is integrated. It was molded as Further, the operation knob 3 is configured to slide in the direction of the arrow, so that the knob 6 of the changeover switch 5 is operated via the connecting plate 7.
[0003]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 6-31040 (FIG. 6)
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the operation knob 3 is sandwiched between the upper control case 1 and the lower control case 2, so that the operation knob 3 is attached to the upper control case 1 when the control case 8 is assembled. There was a problem that it could not be temporarily fixed and dropped in the direction of the arrow in FIG.
[0005]
Further, since the operation knob 3 is merely sandwiched between the upper control case 1 and the lower control case 2, there is a problem that the operation cannot be performed smoothly even after the control case 8 is assembled because the operation knob 3 is loose. Was.
[0006]
Further, in the case of the operation knob 3 particularly curved as shown in FIG. 5, there is a problem that if the user accidentally steps on the operation knob 3, the operation knob 3 is easily broken and falls off.
[0007]
On the other hand, as shown in FIG. 7, the operation knob 3 is temporarily fixed to the upper control case 1, and the operation knob 3 is controlled to the upper side using the holding plate 9 so that the operation knob 3 does not fall off the upper control case 1. There has been a method of sandwiching between the case 1 and the holding plate 9 and stopping with a screw 10. However, this method requires separate parts such as the holding plate 9 and the screw 10, which raises costs and increases the time required for assembly.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a planar heating device that facilitates an assembling operation when assembling a control case.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned conventional problems, the planar heating device of the present invention provides a groove on a slide surface of an operation knob of an upper control case, and the operation knob has a convex portion fitted into the groove. It is a thing.
[0010]
Thereby, when attaching the operation knob to the upper control case during the assembly of the control case, the assembling work can be facilitated without using another component.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 includes a main body containing a heating element, a control circuit for controlling the temperature of the heating element, a control case including the control circuit therein, provided at an end of the main body, and a power supply. The control case is composed of an upper control case and a lower control case, and a groove is formed on the sliding surface side of the operation knob of the upper control case. In addition to providing the operation knob with a convex portion that fits into the groove, the operation knob can be temporarily fixed to the upper control case without using a separate part when assembling the control case, thereby facilitating assembly work. be able to. In the case of a curved operation knob, if the user accidentally steps on the knob, the groove provided in the upper control case and the convex part provided in the operation knob are fitted, so that the operation knob is easily broken and falls off Can be prevented.
[0012]
According to the second aspect of the present invention, when the operation knob is operated by a user, the convex portion provided on the operation knob according to the first aspect functions as a slide guide. The rattling of the operation knob is suppressed, and the operation can be performed smoothly.
[0013]
According to a third aspect of the present invention, the convex portion provided on the operation knob and the groove provided on the upper control case are formed by making the tip of the convex portion provided on the operation knob have an R shape. Is in line contact, the resistance of the operation knob is reduced, and the operation can be performed smoothly.
[0014]
According to the invention described in claim 4, in particular, by making the entrance of the groove provided in the upper control case according to claim 1 have an R-shape, there is less fear of cutting hands at the time of cleaning and the like. It is easier to clean accumulated dust.
[0015]
According to a fifth aspect of the present invention, for example, the depth of the groove provided in the upper control case according to the first aspect is changed, for example, between the turning on and off of the power supply. By this, the operation knob can have a click feeling between on and off, and the user can easily understand that the operation state such as from on to off has changed, and even when the user does not operate It is possible to prevent the power from being turned on or off without permission.
[0016]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
(Example 1)
1 is a plan view of a planar warming device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a control case, FIG. 3 is a rear perspective view of an operation knob, and FIG. 4 is a partial cross-sectional view of an upper control case. It is shown. As shown in FIG. 1, a main body 15 is formed by laminating a surface material 11, a heating element 12, a soft foam body 13, and a backing material 14. A control circuit 4 for controlling the temperature of the heating element 12 is housed in a control case 8 composed of an upper control case 1 and a lower control case 2, and is attached to an end face of the main body 15.
[0018]
Further, the operation knob 3 for turning on / off the power and adjusting the temperature of the heating element 12 is formed by cutting out a part of an end face of the upper control case 1 to form a concave portion 16, and the operation knob 3 is fitted into that portion. As shown in FIG. 2, a convex portion 18 provided on the operation knob 3 is fitted into a groove 17 provided on the upper control case 1, and the knob 6 of the changeover switch 5 on the control circuit 4 is operated. The connecting plate 7 is integrally formed.
[0019]
Next, the operation and action of the planar warming device configured as described above will be described. First, when assembling the control case 8, the operation knob 3 is fitted into the concave portion 16 in which a part of the end face of the upper control case 1 is cut out, and the convex portion provided on the operation knob 3 is inserted into the groove 17 provided in the upper control case 1. Since the fitting 18 is used, the operation knob 3 can be temporarily fixed to the upper control case 1 without using a separate part without falling off.
[0020]
In this embodiment, as shown in FIG. 3, by providing the convex portion 18 of the operation knob 3 of this embodiment in a linear shape, the function of a slide guide when the user operates the operation knob 3 is provided. Therefore, rattling of the operation knob 3 is suppressed, and the operation can be performed smoothly.
[0021]
Further, by forming the tip of the convex portion 18 provided on the operation knob 3 into an R shape, the convex portion 18 provided on the operation knob 3 and the groove portion 17 provided on the upper control case 1 come into line contact, so that the operation knob is provided. 3 can be operated smoothly with little resistance.
[0022]
In addition, as shown in FIG. 4, by making the entrance portion 19 of the groove portion 17 provided in the upper control case 1 into an R shape, there is less fear of cutting a hand at the time of cleaning and the like. Easy to clean.
[0023]
Further, by partially changing the depth of the groove 17 provided in the upper control case 1 of the present embodiment (not shown), for example, by making the groove 17 shallow between turning off and on the power, the operation knob The convex part 18 of 3 becomes a resistance when sliding the part, and the operation knob 3 can have a click feeling between on and off, and it is easy for the user to change the operation state such as from on to off. In addition, it is possible to prevent the power from being turned on / off without permission when the user does not operate.
[0024]
【The invention's effect】
As described above, according to the present invention, when assembling the control knob into the upper control case at the time of assembling the control case, the operation knob can be temporarily fixed without using another component, and the assembling work can be facilitated.
[0025]
Also, if the user steps on by mistake, the groove provided on the upper control case and the convex part provided on the operation knob are fitted, so that it is possible to prevent the operation knob from easily breaking and falling off. it can.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional plan view of a planar heating device according to a first embodiment of the present invention. FIG. 2 is a partial cross-sectional view of a control case of the planar heating device. FIG. 3 is a back surface of an operation knob of the planar heating device. FIG. 4 is a partial cross-sectional perspective view of an upper control case of the planar warming device. FIG. 5 is a partial sectional perspective view of a conventional planar warming device. FIG. 6 is a view illustrating use of the planar warming device. FIG. 7 is a partial cross-sectional perspective view showing the state. FIG. 7 is a partial perspective view of the upper control case of the planar heating device viewed from the back side.
DESCRIPTION OF SYMBOLS 1 Upper control case 2 Lower control case 3 Operation knob 4 Control circuit 8 Control case 12 Heating element 15 Main body 16 Concave part 17 Groove part 18 Convex part 19 Entrance part

Claims (5)

A main body containing a heating element, a control circuit for controlling the temperature of the heating element, a control case containing the control circuit and provided at an end of the main body, and turning on / off the power and controlling the temperature of the heating element. The control case includes an upper control case and a lower control case, and the control case is formed of an upper control case and a lower control case. The upper control case is provided with a groove, and the operation knob is provided with a convex-shaped portion that fits into the groove. Utensils. The planar heater according to claim 1, wherein the convex portion provided on the operation knob is provided in a linear shape. The planar heating device according to claim 1 or 2, wherein a tip of the convex portion provided on the operation knob has an R shape. The planar heating device according to claim 1, 2 or 3, wherein the entrance of the groove provided in the upper control case has an R shape. The planar heater according to claim 1, 3 or 4, wherein the depth of the groove provided in the upper control case is partially changed.

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