JPH0377733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an extension tube for a vacuum cleaner that includes a built-in lead wire for supplying electricity to an electric suction tool.

BACKGROUND ART Conventionally, this type of extension tube for a vacuum cleaner has a structure as shown in Japanese Patent Application Laid-Open No. 56-68420. The configuration will be described below with reference to the drawings.

6 and 7, 1 is a vacuum cleaner body with a built-in electric blower 2 and a removable dust collection box 3; 4 is a hose with two piano wires and two electric wires buried in a spiral shape; Reference numeral 5 denotes an extension tube in which an electric wire 8 is embedded, which has a pin terminal 6 and a female connector terminal 7 at both ends; 9 an electric suction device; 10
is a remote switch.

In addition to the above configuration, a configuration as shown in FIG. 8 has also been considered. In Figure 8, 1
1 is a dust flow path 12 and a wiring path 14 for electric wires 13
It is a pipe formed by extrusion molding, and one end has a connecting pipe 15 and a pipe cover 1.
6 has a connection cover 17 and a buckle cover 18 on the other end.
is glued. Reference numeral 19 denotes a buckle that is disposed between the connection cover 17 and the buckle cover 18 and is detachably engaged with a recess 20 provided in the connection pipe 15. A pin terminal 21 and a socket terminal 22 are provided at both ends of the electric wire 13. A female connector 23 is attached to the pin terminal 21 and the socket terminal 22, which are attached and become a charging part.
and a male connector 24 are inserted and insulated.

Problems to be Solved by the Invention Hitherto, an extension tube for a vacuum cleaner as shown in FIG. 7 has been proposed, but it is difficult to bury the electric wire 8 in the extension tube 5 and the cost is high. Therefore, the configuration shown in FIG. 8 was common, but since the wiring passage 14 was formed small to improve usability, the pin terminal 21, female connector 23, etc. were passed through the wiring passage 14. After passing only the wire 13 into the wiring passage 14, connect the pin terminal 21 and female connector 23 or the socket terminal 22 and male connector 24 to the wire 13.
Since the electric wire 13 had to be attached to the electric wire 13, the pipe 11 got in the way during attachment, making it difficult to assemble the electric wire 13. In addition, the connecting pipe 15 and the pipe cover 1
6, the connection cover 17, and the buckle cover 18 are attached to the pipe 11 by adhesive, so there may be variations in the amount and area of adhesive applied, and variations that affect quality, such as careless application to unnecessary areas. There were many factors involved, and there were also problems in that the working environment deteriorated due to the use of adhesives and that it took time for the adhesives to dry. Moreover, the number of parts increases, the number of assembly steps increases, and it is difficult to automate assembly.
It was becoming expensive.

The present invention solves these problems,
The purpose of this invention is to provide an extension tube for a vacuum cleaner that reduces costs and stabilizes quality by reducing the number of parts and improving ease of assembly.

Means for Solving the Problems In order to solve the above problems, the present invention is formed by a plurality of pipe members divided into left and right parts, and ribs are provided protruding from the inner surface of the pipe members to create a dust flow path. One end or both ends of the pipe member, which separates the wiring path of the electric wires and is fitted with various accessories such as hoses, are not divided in the left and right direction, but are formed with a cylindrical pipe, and this is one of the above members. This is an integral part of the system.

Effects According to the above-described configuration of the present invention, even if connection terminals are attached to both ends of the electric wire, the electric wire can be incorporated into the extension tube. This improves the ease of assembling the electric wire and greatly reduces the number of parts. This reduces work variation in the bonding process, making it possible to stably maintain quality such as strength and performance, and reducing or eliminating the bonding process, improving the work environment and shortening adhesive drying time. At the same time, the strength and durability of the fitting part with other accessories is improved, and the level difference in the pipe to be fitted can be eliminated and the roundness can be increased, which prevents rattling of the fitting and air leakage. .

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In Figures 1 to 5, 25
2 is a vacuum cleaner with a built-in electric blower and dust collection chamber.
6 is a hose containing a spirally wound piano wire and electric wire, 27 is an electric suction device containing a motor and a rotating brush, and 28 is the electric suction device 27.
This is an extension tube with a built-in electric wire 29 that carries a 100V current. A connecting pipe 30 that is inserted into the vacuum cleaner main body 25 is attached to one end of the hose 26, and a tip pipe 31 that is connected to the extension tube 28 is attached to the other end. A switch 32 for turning on and off and a remote control lever 33 for adjusting the suction force are provided. Also, extension tube 2
8 is a tube member 34 that is divided into two left and right in the longitudinal direction;
35 and a rib 36 on the right tube member 34.
is provided protrudingly, and a rib 36 is provided on the left pipe member 35.
By providing a groove 37 for fitting the electric wire 2
9 is separated from the dust flow path 38. 39
Reference numeral 41 denotes a connection cover having holes 40 on both left and right sides into which the electric suction tool 27 and extension tube 28 are inserted and fitted, and 41 a buckle equipped with a claw 42 for removably locking the electric suction tool 27 and extension tube 28. , 43 is a gasket arranged around the hole 40 to prevent air leakage, 44 is a recess into which a claw is engaged, and 45 is an extension tube 28 when stored.
This is an extension tube stopper that fixes the main body 25 of the vacuum cleaner to the main body 25 of the vacuum cleaner. Further, one end of the electric wire 29 has a pin terminal 46 and a female connector 47, and the other end has a socket terminal 4.
8 and a male connector 49 are attached, and the pin terminal 46 and female connector 47 are attached to the tip pipe 31.
Furthermore, the socket terminal 48 and male connector 49 are also attached to the electric suction tool 27. 50 is a wiring path for the electric wire 29 formed from the inner peripheral surface of the right tube member 34 and the rib 36 and separated from the dust flow path 38; 51 is a tapered cylinder formed at one end of the right tube member 34; It is a pipe that is fitted and locked to the tip pipe 31 and the connection cover 39 of the extension pipe 28, and is integrally molded with the right pipe member 34 by a slide core.

In the above configuration, the extension pipe 28 and the tip pipe 3
By integrally providing the cylindrical pipe 51 on the right tube member 34 without dividing only the end of the extension tube 28 that is fitted with the extension tube 1 in the longitudinal direction, the durability of the cylindrical portion against prying and twisting is improved. In addition to improving strength, the cylindrical part eliminates steps and improves roundness, which prevents wobbling and gaps in the mating part, improves usability and appearance, and prevents air leaks. It also prevents fingers from getting hurt due to differences in level.

In addition, by forming the extension tube 28 by the tube members 34 and 35 which are divided left and right in the longitudinal direction at a portion other than the cylindrical pipe 51, the pin terminal 46 and the female connector 47 are connected to one end of the electric wire 29 in advance, and the other end is connected to the pin terminal 46 and the female connector 47. It is only necessary to attach the socket terminal 48 and the male connector 49 to the connector, and in this state, insert the electric wire 29 into the wiring passage 50 from above, eliminating the need to pass the electric wire through a narrow passage as in the conventional case. The ease of assembling the electric wire 29 is greatly improved, and what used to be separate parts can now be integrally formed into the right tube member 34 or the left tube member 35, reducing the number of parts and assembly man-hours. This can be reduced.

Furthermore, by fixing the pipe members 34, 35 and the connection cover 39 by ultrasonic welding, it is possible to eliminate the bonding process, which eliminates variations in quality due to variations in bonding, and eliminates the need for drying time for the adhesive. This will improve the working environment.

Effects of the Invention As is clear from the above embodiments, the vacuum cleaner extension tube of the present invention is formed by a pipe member that is divided in the left and right direction, and only the end portion that is fitted and connected to other parts is divided. By forming the pipe into a cylindrical shape and integrally providing it with one of the pipe members mentioned above, the strength and durability of the fitting part with the extension pipe, hose, etc. can be improved, and the looseness of the fitting can be improved. This reduces costs and stabilizes quality while preventing performance deterioration due to sticking and air leakage. Furthermore, by welding and forming a pipe member divided in the longitudinal direction, and by providing ribs projecting on the inner surface of the pipe member to separate the dust flow path and the electric wire wiring path,
The ease of assembling electric wires has been greatly improved, the gluing process has been eliminated, and the number of parts has been reduced, reducing assembly man-hours, reducing costs, and eliminating variations in quality. The environment can be easily improved and automated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an extension tube showing an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIGS. 3 and 4 are sectional views taken horizontally and vertically in the longitudinal direction, respectively.
FIG. 5 is a perspective view showing the overall configuration, FIG. 6 is an overall configuration diagram of a conventional example, and FIG. 7a is a side sectional view of the extension pipe.
b is a front sectional view, and FIG. 8 is an exploded perspective view showing another conventional example. 29... Electric wire, 34, 35... Tube member, 36...
...Rib, 38...Dust flow path, 50...Wiring path, 51...Cylindrical pipe.

Claims (1)

[Claims] 1. It is formed by a plurality of pipe members divided into left and right parts, and ribs are provided protruding from the inner surface of the pipe members to separate a dust flow path from an electric wire wiring path, and various accessories such as hoses are provided. An extension pipe for a vacuum cleaner, wherein only one end or both ends of the pipe member to be fitted with the product are formed of a cylindrical pipe without being divided in the left-right direction, and this is integrally provided with one of the members. 2. The extension tube for a vacuum cleaner according to claim 1, which is formed by welding or gluing a plurality of left and right divided tube members, with an electric wire provided with connection terminals at both ends built into the wiring passage.