JPH0779783B2 - Pipe fittings such as vacuum cleaners - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint of an electric vacuum cleaner or the like in which an outer insertion tube and an inner insertion tube are engaged by a protrusion.

2. Description of the Related Art Conventionally, as shown in FIGS. 6 and 7, a pipe joint of an electric vacuum cleaner of this type is fitted into an insertion pipe 31 having a protrusion 30 biased outward and engages with the protrusion 30. An engaging hole (33) is provided, an outer insertion tube (32) is detachably fitted, and a concave section (34) having a conical cross section is provided around the engaging hole (33) to suck suction force on the main body of the electric vacuum cleaner (35).
Was in communication with.

However, in the pipe joint described above, when the suction device 35 is removed, the thumb needs a force to push the projection body, and a force is applied in the direction in which the nail and the finger are turned, and the user feels like using it. It was Further, if the concave portion is deepened for easy removal, there is a problem in strength and there is a problem that cracks easily occur around the hole, such as when it hits the wall surface.

The present invention solves the above problems, and is designed to be easily attached and detached so that sufficient strength can be maintained.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an insertion tube having a projection body urged to the outside and a detachable external fitting to the insertion tube, and the projection body is engaged with the projection tube. An outer insertion tube having an engagement hole formed therein, the outer edge of the outer insertion tube having a hole edge of the engagement hole opened, and a concave portion facing the tip of the projection is formed, and the concave portion is The inclination on the side of removing the extracorporeal tube from the intubation is set to be steeper than that on the opposite side.

Effect According to the present invention having the above-described structure, when the suction tool is removed, the thumb comes into contact with the recessed inclination in the direction of removal, and the suction tool can be removed while pushing the projection body, thus exerting a force that pushes the projection body without difficulty. Therefore, the force is applied in the direction in which the nails and fingers are turned over, and the user does not have to worry. Moreover, even when it hits a wall surface, the side to which the force is applied can be strengthened, and the problem of cracks entering around the holes is eliminated.

Example An example of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 4, an auxiliary roller 2 is provided at the lower part of the suction port body 1, and an outer insertion tube 3 is provided at the rear part. Four
Is an insertion tube having a projection 6 held therein by a leaf spring 5 urged to the outside, and the insertion tube 3 having an engagement hole 7 for engaging the projection 6 with the insertion tube 4. The outer tube 3 is detachably provided. A recess 8 is provided on the periphery of the engagement hole 7, and the recess 8 has a front slope 9 in which the slope of the recess 8 in the direction of removing the outer insertion tube 3 from the inner insertion tube 4 is steeper than the opposite side. Further, the outer insertion tube 3 can be formed by a mold whose outside is divided at the center of the recess 8.

In the above structure, when the suction tool 1 is removed, the thumb comes into contact with the forward inclination 9 of the concave portion 8 in the removing direction, and the suction tool 1 can be removed while pushing the projection body 6 and the projection body 6 is pushed without difficulty. Since the force is exerted, the force is exerted in the direction in which the nails and fingers are turned, and the user does not have to worry. Further, even when it hits a wall surface or the like, the side on which the force is applied can be strengthened, and there is an effect that problems such as cracking from around the hole are eliminated.

Further, even if the outer insertion tube 3 is a mold whose outer portion is divided at the center of the recessed portion 8, a sufficiently practical shape can be carried out with a simple structure so that molding can be facilitated.

The same effect can be obtained by forming the steep slope in the removing direction by the rib 10 as shown in FIG.

EFFECTS OF THE INVENTION As described above, according to the present invention, the insertion tube having the protrusion body biased to the outside and the insertion tube detachably fitted to the insertion tube are provided.
An outer insertion tube having an engagement hole with which the projection engages, the hole edge of the engagement hole being opened on the outer peripheral surface of the outer insertion tube,
Since the tip of the projection forms a recess facing the tip, and the recess is set to have a steeper inclination on the side in which the extracorporeal tube is removed from the insertion tube than on the opposite side, the thumb contacts the forward inclination of the concave section. Since the user can perform an integral operation of pushing the protrusion while removing it, and exerting a force to push the protrusion comfortably, the user does not have to worry about the force being exerted in the direction in which the nails and fingers turn. Further, even when it hits a wall surface or the like, the side on which the force is applied can be strengthened, which has the effect of eliminating problems such as cracking around the holes.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a fitting state of a pipe joint showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a perspective view thereof, and FIG. FIG. 5 is a sectional view showing a vacuum cleaner in use, FIG. 5 is a sectional view showing another embodiment of the present invention, FIG. 6 is a perspective view of a conventional pipe joint, and FIG. is there. 3 ... Outer tube, 4 ... Inner tube, 6 ... Projection body, 7 ... Engagement hole, 8 ... Recessed section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Kogei Kato, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 61-240931 (JP, A) 45524 (JP, U)

Claims (1)

[Claims] 1. An insertion tube having a projection body biased to the outside,
An outer insertion tube that is detachably fitted to the inner insertion tube and has an engagement hole with which the projection is engaged is provided, and a hole edge of the engagement hole is opened on the outer peripheral surface of the outer insertion tube. A pipe joint for an electric vacuum cleaner or the like in which a concave portion facing the tip of the protrusion is formed, and the concave portion is set to have a steeper slope on the side of removing the extracorporeal tube from the internal tube than on the opposite side.