JPS6173629A - Hose inlay apparatus of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hose used in a vacuum cleaner and a structure for connecting a pipe to the hose.

Structure of a conventional example and its problems FIG. 1 shows a joint between a hose and a pipe used in a conventional vacuum cleaner. A pipe 2 fixed to the end of the spiral hose 1 and connected to a vacuum cleaner or a floor nozzle (none of which are shown) has a pipe cover 4 integrally formed inside to cover a threaded part 3. Was. The threaded portion 3 is matched to the spiral shape of the hose 1, and the hose 1 can be rotated and inserted to be connected to the knob 2.

Although the above is the conventional structure, a step was created between the step portion 6 of the pipe 2 and the inner surface of the hose 1. Therefore, pipe 2
When the fluid flows from the pipe 2 to the hose 1, the velocity of the fluid coming out of the pipe 2 enters the inside of the hose 1 and rapidly decreases, resulting in a major disadvantage that dirt accumulates inside the hose 1. On the other hand, when the water flows from the hose 1 to the pipe 2, there is a drawback that dirt accumulates in the stepped portion 5.

In addition, since the outer circumference of the threaded part 3 of the pipe 2 and the inner surface of the hose 1 are fitted together, the end surface of the hose 1 is unsightly, and some form of cover must be provided to protect the hose joint. In the case of this conventional example, the mold structure of the pipe 2 is very complicated (the structure for removing the threaded portion 3), resulting in a large cost increase.

OBJECTS OF THE INVENTION The present invention provides a pipe to be connected to a hose that solves the above-mentioned conventional problems.

Structure of the Invention The hard pipe provided with the fitting part that connects with the hose used in the vacuum cleaner of the present invention has an uneven part provided on the inner surface of the fitting part opposite to the uneven shape of the spiral hose. , the hose can be inserted and fixed by rotating it, and the inside diameter of the pipe and the inside diameter of the hose are the same,
This configuration allows fluid to flow smoothly within the hose, eliminates dust accumulation, and greatly simplifies the fitting of the hose and pipe, further improving the bonding force.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, 11 is a spiral elastic hose, 12 is a pipe fixed to the end of the hose 11 and connected to a vacuum cleaner or a floor nozzle (none of which is shown), and the outer surface of the end of the hose 11 is It has a threaded portion 13 that fits into the.

Here, the fitting part 14 of the hose 11 serves as a male thread, and the threaded part 13 of the pipe 12 serves as a female thread, so that the hose 11 can be inserted into the pipe 12 while rotating.

Here, as shown in the figure, since the pipe 12 is fitted with the outer circumference of the hose 11, the inner diameter of the pipe 12 and the inner diameter B of the hose 11 can be made the same, and the flow from the pipe 12 to the hose 11 becomes possible. The velocity of the fluid flowing from the pipe 12 to the hose 11 and from the hose 11 to the pipe 12 remains constant. Therefore, dirt and dust do not stay inside the hose 11 and are sucked into the electric vacuum cleaner.

Moreover, the pipe 12 is fitted with the outer periphery of the hose 11,
Since the joint portion is not visible to the outside and there is no need for a cover integrally formed with the pipe 12, a very simple mold structure can be achieved. Furthermore, there is no need to use separate parts such as a pipe cover made of rubber or the like, and the number of parts can be reduced.

In addition, when the hose 11 is formed by blow molding (vacuum forming), the outer diameter of the hose 11 can be made precise, so the fitting with the pipe 12 is reliable, there is less looseness, and the tensile strength ( The bonding force between the hose 11 and the pipe 12 increases.

Moreover, since the hose 11 is fitted on the outside diameter, the contact area with the pipe 12 can be larger than when the hose 11 is fitted on the inside diameter, so that the tensile strength can be further increased.

Effects of the Invention As is clear from the above embodiments, according to the vacuum cleaner hose fitting device of the present invention, fitting can be performed depending on the outer diameter of the hose, so the cross-sectional area of the pipe and the hose can be kept constant. It is possible to prevent dirt from accumulating inside the hose. It also has various effects such as greatly simplifying the structure and improving the bonding force between hoses and pipes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hose fitting device in a conventional vacuum cleaner, and FIG. 2 is a sectional view of a hose fitting device in a vacuum cleaner showing an embodiment of the present invention. 11...Hose, 12...Pipe, 1
3...Screw part.

Claims (1)

[Claims] It is equipped with an extensible hose with a spiral unevenness and a hard pipe with a fitting part that fits into the end of the hose, and the fitting part of the pipe has a spiral unevenness on the end of the hose. A hose fitting device for a vacuum cleaner, in which uneven parts are provided on opposing inner surfaces so that the hose can be inserted and fitted by rotation, and the inner diameter of the pipe and the inner diameter of the hose are approximately the same when the hose is fitted to the pipe.