JPH0226441Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for removably fitting and connecting pipes used in a vacuum cleaner.

[Prior art] In a vacuum cleaner, the hand pipe of the dust suction hose connected to the vacuum cleaner body and the suction mouth body are connected to each other.
Used by connecting multiple pipes that can be attached and detached.

Then, an engagement hole is provided at the end of one of a pair of pipes that are conventionally removably fitted and connected, and the above-mentioned engagement hole is inserted through this pipe inside the end of the other pipe. Attach a spring member with a removable retaining pin protruding from the retainer pin, and press the retainer pin or a push button protruding from the spring member to elastically deform the spring member. A technique that allows pipes to be attached and detached from each other is known from Japanese Utility Model Application Publication No. 48-96763.

In addition to this, a locking protrusion is provided protruding from the outer periphery of one end of the pipe that is detachably connected.
Furthermore, two slits parallel to the axis of the pipe are provided at the end of the other pipe that is fitted into the end of the one pipe, and the space between these slits can be flexibly deformed. JP-A-50-117258 discloses a technique in which a hole-shaped locking notch is provided in which the locking protrusion is engaged and detached, and a pair of pipes can be attached and detached by engaging and disengaging the locking protrusion and the locking notch. known in the official gazette.

[Problems to be solved by the invention] However, the technology disclosed in Japanese Utility Model Application Publication No. 48-96763 requires a large number of parts due to the use of spring materials.
Moreover, this spring material not only serves as wind path resistance, but also
There was a problem that the dirt that was sucked in got entangled with the spring material. Furthermore, in the technique disclosed in JP-A-50-117258, the slit is exposed on the outer surface of the pipe connection part, and the clearance between the locking protrusion and the hole-shaped locking notch is exposed on the outside surface of the pipe connection part. Therefore, there was a problem that there was a high possibility that outside air would be sucked into the pipe through these parts.

An object of the present invention is to provide a pipe connection device for a vacuum cleaner with a simple structure that does not cause air path resistance or entanglement of dirt, and can prevent outside air from being sucked in.

[Means for Solving the Problems] In order to achieve the above object, in the vacuum cleaner pipe connection device of the present invention, one pipe of a pair of pipes that are removably fitted and connected. An engagement hole is provided in the fitting end of the pipe, and a slit is provided in the fitting end of the other pipe into which the fitting end is fitted to form a flexible deformable portion. A locking convex portion that is engaged and detached from the locking hole is integrally provided on the outer surface of the flexible deformable portion, and a tapered annular seal protrusion that is larger than the locking hole is provided on the outer surface of the flexible deformable portion of the locking convex portion. It is integrally installed around the periphery of the .

[Function] In the vacuum cleaner pipe connection device of the present invention, the fitting end of one pipe is pressed with a finger on the locking protrusion on the outer surface of the flexible deformation part that is integrally deformed with the fitting end. When the end is fitted inside the fitting end of the other pipe, the flexible deformation part returns to its original state, and the locking protrusion on its outer surface engages with the locking hole provided in the fitting end of the other pipe. match. This connects the pair of pipes. In this connected state, the slit forming the flexible deformation portion is covered by the fitting end of the other pipe having the locking hole,
No exposure to the outside of the pipe connection. Further, due to the restoring force of the flexible portion, the annular seal protrusion on the outer surface of the flexible portion comes into elastic contact with the inner surface of the peripheral portion of the locking hole at the fitting end of the other pipe having the locking hole. Therefore, even though the clearance between the locking hole and the locking convex portion is exposed on the outer surface of the pipe connection portion, the pipe connection portion can be reliably sealed. In addition, by pushing the locking protrusion of the pipe connecting body into the pipe with your finger, the engagement between this protrusion and the locking hole can be released, and in this state, both pipes can be pulled in opposite directions. This allows these two pipes to be separated.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 21 is a pipe on the side of the suction port, and 22 is a pipe on the side of the cleaner body, and these are designed to be removably fitted and connected.

One pipe 22 has a fitting end 23 with a reduced diameter. This end portion 23 is provided with, for example, a U-shaped slit 24, and between the slits 24 a flexible deformable portion 25 consisting of a portion of the fitting end portion 23 is formed. And the flexible deformation part 25
A locking convex portion 26 is integrally protruded from the outer surface of the convex portion 26, and the peripheral edge of the distal end of the convex portion 26 is chamfered.

Further, a locking convex portion 2 is provided on the outer surface of the flexible deformable portion 25.
A tapered annular seal protrusion 29 is integrally provided around the periphery of the seal 6 . The diameter of this seal projection 29 is larger than that of a locking hole described later. The annular seal protrusion 29 is provided to come into elastic contact with the inner surface of the peripheral portion of the locking hole, which will be described later, thereby ensuring sealing performance of the pipe connection portion.

The other pipe 21 has a fitting end 27 with an enlarged diameter. This end portion 27 is fitted onto the end portion 23, and is provided with a locking hole 28 into which the locking convex portion 26 is engaged and released.

Note that the pipes 21 and 22 are both made of synthetic resin, and the fitting ends 23 and 27 have the same length. Further, arrow A in FIG. 2 indicates the direction of wind flow.

In the above structure, a pair of pipes 21 and 22
To connect, the locking protrusion 26 of the fitting end 23 is pressed with a finger (at this time, the flexible deformation part 25 is flexibly deformed as shown by the two-dot chain line in FIG. 2). ), by fitting this fitting end 23 inside the fitting end 27, these both ends 23, 27 may be fitted.

Then, the locking protrusion 26 will face the locking hole 28 when the predetermined fitting depth is reached.
The locking convex portion 26 is engaged with the locking hole 28 as the flexible deformable portion 25 is restored. In this way, the pipes 21 and 22 are connected.

In this connected state, the fitting end 23 of the pipe 22 is covered by the fitting end 27 of the pipe 21, so the slit 24 forming the flexible deformation part 25 is a ventilation channel exposed on the outer surface of the pipe connection part. It never happens. Moreover, an annular seal protrusion 29 integrally provided on the outer surface of the flexible deformable portion 25 surrounding the locking convex portion 26 is formed in the locking hole at the fitting end portion 27 by the elastic force of the flexible deformable portion 25. It comes into elastic contact with the inner surface of the peripheral portion of 28. Therefore, although there is a clearance between the locking hole 28 and the locking convex portion 26 and this is exposed on the outer surface of the pipe connection part, there is a clearance provided near this through this clearance. The annular seal protrusion 29 can reliably prevent air from outside the pipe connection portion from being sucked into the slit 24.

In this embodiment, since the fitting ends 23 and 27 are made to have the same length, the tips of the fitting ends 23 and 27 correspond to the steps 21a and 22 of the pipes 21 and 22, respectively.
a, and the fitting of each fitting end 23, 27 is positioned. In addition, when a load acts in the directions of arrows B and C in FIG. 2, this load can be received by the pipes 21 and 22 and can be prevented from acting on the locking convex portion 26.

In addition, in order to remove the connected pipes 21 and 22, press the locking protrusion 26 with your finger and flexibly deform the flexible deformation part 25.
All you have to do is separate 1 and 22.

Although the above-mentioned embodiment is constructed as described above, in the present invention, the slits 24 may be formed in the opposite direction to that of the above-mentioned embodiment, and may also be formed as a pair of parallel slits 24 as shown in FIG. No problem. However, the parallel slits 24 may be provided along the radial direction. Note that 30 in FIG. 5 is a recessed portion provided as necessary to make the deformation of the flexible deformable portion 25 easier. In addition, unless it goes against the gist of the present invention, the specific structure, shape, position, etc. of the fitting end of the pipe, slit, flexible deformation part, locking protrusion, annular seal protrusion, locking hole, etc.
It goes without saying that the present invention is not limited to the one embodiment described above and can be configured and implemented in various ways.

[Effect of the invention] According to the invention described above, a slit is provided in the fitting end of one pipe to form a flexible deformation part, and the fitting end of the other pipe is formed on the outer surface of this deformation part. Since the locking convex portion that locks and disconnects from the locking hole provided in the pipe is integrally provided, these pipes can be attached and detached without requiring any parts other than the pair of pipes. Therefore, since the conventionally necessary spring material is not required, the structure is simple, the air passage resistance can be reduced, and the dust that is sucked in is not caught. Then, on the inner surface of the peripheral part of the locking hole provided at the fitting end of the pipe that covers the slit forming the flexible deformation part, a projection is integrally formed around the locking convex part on the outer surface of the flexible deformation part. Since the provided annular seal protrusion is brought into elastic contact with the elastic force of the flexible deformation part, the clearance between the locking convex part and the locking hole is exposed on the outer surface of the pipe connection part, and furthermore, this clearance and the slit are close to each other. Nevertheless, the annular seal protrusion can reliably prevent air from being sucked in from outside the pipe connection.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Figure 1 is an exploded perspective view, Figure 2 is a vertical side view, Figure 3
The figure is a sectional view taken along the line - in FIG. 2, and FIG. 4 is an enlarged sectional view taken along the line - in FIG. 1. FIG. 5 is a plan view of one pipe showing another aspect of the slit and the flexible deformation portion. 21, 22... Pipe, 23, 27... Fitting end portion, 24... Slit, 25... Flexible deformation portion, 2
6... Locking convex portion, 28... Locking hole, 29... Annular seal protrusion.

Claims (1)

[Scope of utility model registration request] An engagement hole is provided at the fitting end of one of the pair of pipes that are removably fitted and connected,
A slit is provided in the fitting end of the other pipe into which the fitting end is fitted to form a flexible deformable part, and a slit is formed on the outer surface of the flexible deformable part to be engaged with and disengaged from the locking hole. A locking protrusion is integrally provided, and a tapered annular seal protrusion larger than the locking hole is integrally provided on the outer surface of the flexible deformable portion around the locking protrusion. Pipe connection device for vacuum cleaners.