JPS6249078B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a steam iron.

Conventionally, in a steam iron, a vaporizing chamber that guides water to vaporize it in the base and an injection hole communicating with this vaporizing chamber are provided, and a base cover is attached on the base to cover the upper surface of the vaporizing chamber and the injection hole. ing.

When installing this base cover, generally a silicone-based sealant is interposed in the mounting part of the base and tightened with screws, but with such a case, the sealant flows into the vaporization chamber and the silicone The vaporization surface becomes water-repellent, significantly reducing vaporization efficiency.

Therefore, as shown in Japanese Utility Model Publication No. 55-30480, a crimping protrusion is provided on the base, and after the base cover is crimped with this protrusion, a silicone sealant is applied around the base cover. proposed, and was able to significantly improve the above drawbacks.

However, since the base and the base cover are metal materials that are in contact with each other, it is inevitable that a minute gap will be created, and the sealant applied on the outside may enter the inside through the gap. Therefore, if the viscosity of the sealant is increased, the seal will be incomplete.

The present invention aims to improve these points by reliably preventing steam leakage and eliminating the influence of the sealant.

Next, one embodiment of the present invention will be described with reference to the drawings. First, the basic structure of a steam iron will be explained with reference to FIG.

Reference numeral 1 denotes a base made of aluminum die-casting or the like, and a heater 2 is embedded within this base 1. A vaporization chamber 3 is formed on the upper surface of the base 1, and a steam chamber 6 is formed around the vaporization chamber 3, which communicates with the vaporization chamber 3 through a flow gap 5 at the upper part of the partition wall 4. An injection hole 7 is drilled in the lower surface of 6. A base cover 8 made of an aluminum plate or the like is mounted on the base 1 to cover the upper surfaces of the vaporization chamber 3 and the steam chamber 6.

Also, a water tank 9 is placed on the top of this base cover 8.
A drip valve 11 having a drip hole 10 facing the vaporization chamber 3 through the base cover 8 is attached to the lower part of the water tank 9, and a valve rod 12 is attached to the drip valve 11. Further, a grip 13 is attached to the upper part of the water tank 9, and an operation button 14 for moving the valve rod 12 up and down is provided on the grip 13.

Then, the heater 2 is energized to heat the base 1, and the operation button 14 is operated to raise the valve lever 12, so that water in the water tank 9 is dripped into the vaporization chamber 3 from the drip hole 10 of the drip valve 11 and vaporized. The steam is introduced into the steam chamber 6 through the flow gap 5 at the upper part of the partition wall 4, and is injected from the injection hole 7 onto the lower surface of the base 1.

Next, the mounting portion of the base cover 8 will be explained with reference to FIGS. 2 to 5.

A projecting wall 16 is provided on the outer side of the upper end of the outer wall 15 around the upper surface of the base 1, and a step 17 is provided inside the projecting wall 16, and a projecting strip 18 having a triangular cross section is provided on the step 17 all around. At the same time, a shallow groove 19 is provided along the inner part of the step part 7 around the entire circumference.

Further, a protrusion 20 having a triangular cross section is provided on the lower surface of the outer peripheral edge of the base cover 8 at a position corresponding to the groove 19 around the entire circumference.

Then, the outer peripheral part of the base cover 8 is fitted onto the stepped part 7 of the outer wall 5 of the base 1, and
The protrusion 20 is engaged with the concave groove 19, and the outer peripheral part of the base cover 8, that is, the protrusion 18,
Press 20 parts from above, and then crimping mold 2
2, the entire circumference or a part of the inner portion 23 of the projecting wall 16 is press-deformed and caulked, and the base cover 8 is pressed and fixed onto the stepped portion 17 of the outer wall 15 of the base 1. In this case, since the base cover 8 made of an aluminum plate is softer than the base 1 made of aluminum die-casting, the protrusion 18 is
It bites in while being slightly crushed, and the protrusion 20
will be bitten into the concave groove 19 while being crushed, but the protrusions 18 and 20 that bit into the other side
The pressure is higher in some parts than in other parts, and the contact part between the stepped part 17 of the base 1 and the base cover 8 is sealed by the crushing of the metals.

Although a sealant is not particularly necessary, a silicone-based sealant may be applied to the outer circumference of the base cover 8 in some cases. In this case, although the sealant enters between the protruding wall 16 of the base 1 and the end face of the base cover 8, it does not flow inward from the crushed portion of the protruding rim 20.

In addition, when the protrusions 20 of the base cover 8 are formed to have a triangular cross section on the outer periphery as in the above embodiment, they can be easily formed into a burr shape by chamfering the die when punching from the plate material, and are practical. Although this is effective, a bead may be provided on the lower surface of the base cover 8 slightly inward from the outer edge.

According to experiments, when the base 1 made of aluminum die-casting was made of ADC-12, which is commonly used, and the base cover 8 made of an aluminum plate was made of A-1100, which is also commonly used, the base 1 material was the same as the base cover. Although the protrusions 18 of the base 1 dig deeply into the base cover 8 and the protrusions 20 of the base cover 8 are crushed considerably, it was confirmed that the protrusions 18 and 20 sufficiently seal. Ta.

According to the present invention, on the abutment surfaces of the base and the base cover at their outer peripheries, protrusions are formed along the entire circumferences of the base and base cover so that the protrusions are in close contact with each other's abutment surfaces, and the base and the base cover are connected to each other via the protrusions. Since it is crimped, the pressure contact force of this abutment part is high, and leakage of steam can be reliably prevented, and even when a sealant is used, the influence of the sealant can be sufficiently prevented.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the steam iron of the present invention, Figs. 2 and 3 are enlarged sectional views of its main parts, and Fig. 4 is a bottom view of its base cover. , FIG. 5 is a sectional view taken along the line AA in FIG. 4. 1...base, 3...vaporization chamber, 7...injection hole, 8...base cover, 18, 20...projection.

Claims (1)

[Claims] 1. A base having a vaporization chamber for guiding and vaporizing water and an injection hole communicating with the vaporization chamber, and a base cover that is placed on the base and covers the upper surface of the vaporization chamber and the injection hole, Protrusions are formed around the entire circumference of the base and the base cover so that they come into close contact with each other's abutment surfaces on the outer periphery of the base cover, and the base and the base cover are crimped together via the protrusions. A steam iron featuring