JP2703020B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose mounting device suitable for a suction hose of a vacuum cleaner, and more particularly to a hose mounting device capable of easily replacing a hose.

[Conventional technology]

Conventionally, a hose mounting device of this type is mounted on a hose having a helical protrusion on an outer periphery, a hose locking member provided with a multiple number of protrusions that engage with the protrusion of the hose, and inserted into a hose joint. A hose stopper for locking the hose joint is attached to the joint. The hose locking member prevents the hose from bending and improves the mounting strength between the hose and the hose locking member. Cylindrical projection is integrally formed with a wall in contact with the end face of the hose. Further, a cutout is provided in a wall where the end face of the hose comes into contact. Further, the hose and the hose locking member are provided with a projection of the hose locking member on the same pitch as the pitch of the spiral projection of the hose, and the hose locking member is attached to the hose. It was screwed in until it came into contact with the surface facing the end face of the hose.

[Problems to be solved by the invention]

In the above prior art, workability when replacing the hose due to damage to the hose is not considered,
A problem that the hose locking member is screwed into the hose more than necessary, the end face of the hose is cut into the notch, and a strong force is required to remove the hose and the hose locking member, and the workability of hose replacement is poor. There was.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce a detachment force of a hose locking member, that is, a tightening torque, and to improve workability of hose replacement.

[Means for solving the problem]

In order to achieve the above object, the present invention is characterized in that the sucked dust is guided to the dust collecting chamber of the cleaner body, the hose has a spiral projection in the axial direction, and the hose is provided at the end of the hose. A cylindrical hose locking member provided with a plurality of projections that engage with a concave portion formed between the spiral projections of the hose, a hose joint in which the hose locking member is rotatably housed, A vacuum cleaner having a hose stopper fixed to the hose joint and preventing the hose engaging member housed in the hose joint from being pulled out, wherein the hose engaging member has a hose end face. Are provided and a plurality of projections are provided on the wall.

[Action]

A projection provided on a wall surface of the hose locking member that comes into contact with the end surface of the hose comes into contact with the end surface of the hose, so that the end surface of the hose does not easily enter into the notch of the hose locking member. Further, the projection has an effect of reducing the contact area between the end surface of the hose and the wall surface with which the end surface of the hose comes into contact. According to the present invention, the hose and the hose joint are not screwed more than necessary, and the hose end face is not easily cut into the hose locking member, so that the detaching force between the hose and the hose joint is reduced.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The present embodiment is a hose mounting device for a suction hose used in a vacuum cleaner, and in this embodiment, an accessory such as an extension pipe having a suction port is attached to the vacuum cleaner.

In this embodiment, a flexible hose 2 having a helical projection 1 on its outer circumference is provided with four projections 4, 5, 6, 7 for engaging a cylindrical hose locking member 3 with the projection 1 of the hose 2. The hose joint 8 is provided with locking holes 9 and 10 and is provided with protrusions 11 and 12 for locking with the locking holes 9 and 10. The main parts are formed by attaching the hose stopper 8 to the hose joint 8 by engaging the projections 11 and 12 in the engaging holes 9 and 10 and attaching the projections 11 and 12 to the hose joint 8. With these configurations, in this embodiment, when a pulling force is applied to the hose 2, the hose locking member 3 is attached to the hose stopper 13 attached to the hose joint 8.
The hose lock member acts as a lock portion of the hose 2 with the hose joint 8 so that the hose lock member does not easily come out. Further, the connection between the hose 2 and the hose joint 8 is not fixed by bonding, screw fitting, or the like.
The hose 2 is rotatably held by a combination of the tubular hose locking member 3 and the hose stopper 8, so that the hose 2 is twisted during use by the user, that is, during the cleaning operation using the electric vacuum cleaner. According to the present embodiment, even when a directional force is applied, the connection between the hose 2 and the hose joint 8 rotates, and the hose 2 does not twist.

Further, in the hose locking member 3 in the present embodiment, a cylindrical projection 14 to be fitted to the inner wall of the hose 2 is integrally formed with a wall 16 with which the end face of the hose 2 is in contact. Are provided with notches 17, 18, 19, 20 opposite to the projections 4, 5, 6, 7 in the axial direction of the hose locking member 3. The cylindrical projection 14 is for preventing the hose 2 from bending, and when the hose 2 is subjected to a pulling-out force, the hose 2 bends due to the flexibility of the hose 2. The engagement between the projection 1 of the hose 2 and the projections 4, 5, 6, 7 of the hose locking member 3 will not be disengaged, so that the hose 2 and the hose locking member 3 can be securely attached. In addition, cylindrical projection 14
Has an action of preventing a leak at a mounting portion between the hose 2 and the hose locking member 3. Furthermore, the cylindrical projection 14 is
By integrally forming the hose locking member 3 with the 16 interposed therebetween, the above-described effect can be obtained without increasing the number of parts, and the assembly workability is excellent. Further, by inserting the end surface of the hose 2 into the hose locking member 3 until it comes into contact with the wall 16, the mounting position of the hose locking member 3 of the hose 2 is clarified, and notches 17, 18, 19, With the provision of 20, it is possible to confirm at the time of assembling that the hose 2 is in contact with the wall 16, so that it is possible to prevent improper mounting of the hose locking member during the assembling operation. Notch 1
7,18,19,20 are projections 4,5,6,
Since the hose engaging portion 3 is provided so as to be opposed to 7, the molding of the hose locking portion 3 can be performed by a molding die divided in the axial direction of the hose. Accordingly, it is not necessary to divide the molding die while twisting, and the processability is excellent.

Further, in the present embodiment, a tapered tubular projection 22 is formed on the surface 21 of the hose joint 8 facing the hose locking member 3 at the back, and the tubular projection 22 is brought into contact with the tubular projection 22 and fitted. The annular projection 23 is connected to the hose joint 8 of the hose locking member 3.
The hose engaging member 3 is provided with a cylindrical projection 24 that comes into contact with the inner surface 21 of the hose joint 8. Of these configurations, the annular projection 23 provided on the hose locking member 3 prevents leakage at the hose mounting device by contacting the entire periphery of the distal end with the tubular projection 22 formed on the hose joint 8. Things. Further, the cylindrical projection 24 provided on the hose locking member 3 reduces the contact area between the hose joint 8 and the hose locking member 3, and allows the hose locking member 3 to rotate inside the hose coupling 8. In addition, this is for reducing the friction, whereby the hose locking member 3 rotates favorably in the hose joint 8.

Furthermore, in this embodiment, in addition to the above configuration, four radial projections 25, 26, 27, 28 are provided on the wall surface of the wall 16 of the hose locking member 3 which faces the end surface of the hose 2 with which the hose 2 abuts. Is provided.

Here, the work of attaching the hose 2 and the hose locking member 3 will be described. The projections 4, 5, 6, and 7 of the hose locking member 3 that engage with the spiral projection 1 of the hose 2 are The hose 2 and the hose locking member 3 are mounted on the same pitch as the screw line of the projection 1 having the hose 2 and the hose locking member 3 is screwed into the hose 2. Also, hose 2
Is a piece of a continuously manufactured hose cut to an arbitrary length, and has a helical projection 1. The end of the hose is not flat.

In the present embodiment, the radial projections 25, 26, 27, and 28 provided on the hose locking member 3 have their tips abutting against the end face of the hose 2, whereby the hose 2 is connected to the hose locking member 3.
The notches 17, 18, 19, and 20 provided in the wall 16 of the vehicle are not screwed until they enter. Also, the wall 16 of the hose locking member 3
The contact area of the end surface of the hose 2 is reduced as compared with the case where the entire periphery of the end surface of the hose 2 is in contact with the hose 2, thereby reducing the friction between the hose 2 and the wall of the hose locking member 3. . further,
Even when the end surface of the hose 2 does not form a plane parallel to the wall 16 of the hose locking member 3, the end surface of the hose
26, 27, 28, and 29, so that the notches 17, 18, 19, and 20 of the hose locking member 3 do not get into the notches. Therefore, when removing the hose 2 and the hose locking member 3 in order to replace the hose 2 due to a damage or the like of the hose 2, the removal operation is performed by twisting the hose locking member 3 in the opposite direction to the mounting. The end of the hose 2 is notched due to
8, 19, 20 It can be easily done because there is no catch due to digging in.

〔The invention's effect〕

According to the present invention, the frictional force between the end surface of the hose and the wall surface that comes into contact with the end surface of the hose having the hose locking member is reduced,
Also, since the end face of the hose does not bite into the notch provided on the wall surface of the hose locking member,
The removal force of the hose locking member is reduced, thereby improving the workability of replacing the hose.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an outline of an embodiment of the present invention, FIG. 2 is a left side view of a hose locking member of FIG. 1, FIG. 3 is a right side view of the same, and FIG. FIG. 5 is a left side view of the hose stopper of FIG. 1, and FIG. 6 is a view as viewed from A in FIG. Reference numeral 1 denotes a projection of the hose 2, 2 denotes a hose, 3 denotes a hose locking member, 4, 5, 6, 7, a projection provided on the hose locking member 3, 8 denotes a hose joint, and 13 denotes a hose joint. Hose stopper, 16 ……
Wall, 25, 26, 27, 28... Projections radially provided on the hose locking member 3.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigehiko Suzuki 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Plant of Hitachi, Ltd. No. 1 Inside the Taga Plant of Hitachi, Ltd. (56) References JP-A-2-177922 (JP, A) JP-A-59-222694 (JP, A) JP-A-2-185216 (JP, A) 54-166779 (JP, U) Fully open 1981-148351 (JP, U) Fully open 1962-139693 (JP, U) Fully open 1986-56953 (JP, U) Fully open 60-60261 (JP, U) U) Jiko 46-7074 (JP, Y1) Jiko 46-36840 (JP, Y1) Jiko 59-2573 (JP, Y2) Jiko 1-24427 (JP, Y2)

Claims (2)

(57) [Claims] 1. A hose which guides sucked dust into a dust collecting chamber of a cleaner body and has a spiral projection in a lateral direction, and is formed at an end of the hose and formed between the spiral projection of the hose. A tubular hose locking member provided with a plurality of projections for engaging with the formed concave portion, a hose joint in which the hose locking member is rotatably housed, and the hose locking member housed in the hose joint And a hose stopper fixedly attached to the hose joint, wherein the hose locking member is provided with a wall in contact with a hose end face, and a plurality of the walls are provided on the wall. An electric vacuum cleaner provided with projections. 2. A hose which guides sucked dust into a dust collection chamber of a cleaner body and has a spiral projection in a lateral direction, and is provided at an end of the hose and formed between the spiral projection of the hose. A tubular hose locking member provided with a plurality of projections for engaging with the formed concave portion, a hose joint in which the hose locking member is rotatably housed, and the hose locking member housed in the hose joint And a hose stopper fixedly attached to the hose joint, and a wall having a notch and a notch in contact with the hose locking member. The plurality of protrusions and the notch are provided so as to face each other in the axial direction of the hose locking member.