JP3262984B2 - Vacuum cleaner extension tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension pipe connected to an operation pipe at hand.

[0002]

2. Description of the Related Art Conventionally, an extension pipe 1 shown in FIG. 12 has been known. The extension pipe 1 is composed of a resin pipe 1A connected to the hand control pipe 2 and a metal pipe 1B made of aluminum or the like connected to the tip of the pipe 1A. The pipe 1B is stored in the pipe 1A by operating the operation button 3 or the pipe 1A.
When the finger is released from the operation button 3, the projection (not shown) engages with the concave portion 4 of the pipe 1B, and the pipe 1B is fixed to the pipe 1A. It can be adjusted and used.

Further, a seal member S is provided between the inner peripheral surface of the pipe 1A and the outer peripheral surface of the pipe 1B and closer to the operation section 7 than the position of the operation button 3. This is because the protrusion engages with the concave portion of the pipe 1B through the hole (not shown) of the pipe 1A by operating the operation button 3, so that the inner peripheral surface of the pipe 1A and the outer peripheral surface of the pipe 1B are formed from the hole. This is to prevent entry into the pipe 1A through the space between the two.

[0004] A cylindrical sleeve for fixing the seal member S at the position shown in the figure and slidably holding the pipe 1B is attached to the inner peripheral surface of the pipe 1A.
In addition, as shown in FIG. 13, at the rear end of the pipe 1B,
An outwardly protruding projection 8 is provided. This is achieved by engaging a not-shown groove provided in the inner peripheral surface of the pipe 1A along the axial direction, thereby forming the pipe 1B with respect to the pipe 1A.
Is prevented from rotating in the circumferential direction.

[0005] The extension pipe 1 is assembled from the tip 1b of the pipe 1B through a sealing member S and a sleeve.
B, and then the rear part of the pipe 1B is inserted into the pipe 1A together with the sealing member S and the sleeve, and then the operation button 3 is assembled. By assembling the operation buttons 3, the sleeve can be attached to the inner peripheral surface of the pipe 1A.
By the attachment of the sleeve, the seal member S becomes the pipe 1A.
Is fixed at a predetermined position on the inner peripheral surface of the.

[0006]

However, in such an extension pipe 1, since the pipe 1B is made of metal such as aluminum, the tip 1 of the pipe 1B is stored at the time of storage.
If b is hit against a hard object, its tip will be dented, and there is a problem that the connection pipe 6 of the suction port body 5 cannot be connected. To solve this problem, a protection member may be attached to the tip 1b of the pipe 1B. However, a new problem arises such as an increase in the number of parts and an increase in cost.

In order to solve this problem, it is conceivable that a flange is integrally formed on the outer periphery of the distal end portion 1b of the pipe 1B. However, by providing the projection 8 at the rear end portion of the pipe 1B, a cylindrical shape is provided. This makes it impossible to pass the pipe 1B through the sleeve, and as a result, there is a problem that it is difficult to attach the sleeve to the inner peripheral surface of the pipe 1A.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to prevent the tip of a metal pipe from being dented without attaching a protection member to the tip, and An object of the present invention is to provide an extension tube of a vacuum cleaner in which an annular member such as a sleeve can be easily assembled.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first pipe member connected to an operation pipe connected to a cleaner body via a hose, and a first pipe member connected to the first pipe member. A metal second pipe member connected to the distal end so as to be able to advance and retreat and to be fixable; a seal member provided between an outer peripheral surface of the second pipe member and an inner peripheral surface of the first pipe member; An annular member attached to the inner peripheral surface of the pipe member to fix the seal member at a predetermined position on the inner peripheral surface of the first pipe member; In an extension pipe of a vacuum cleaner, wherein a protrusion for preventing rotation is bent outward, a flange portion for preventing deformation that protrudes outward is formed at a tip end of the second pipe member, and That the member has a notch cut in the axial direction And butterflies.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an extension pipe of a vacuum cleaner according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a vacuum cleaner main body.
In the main body 10, an electric blower 12 for providing a negative pressure to the dust collection chamber 11 is provided, and a dust collection filter 13 is provided in the dust collection chamber 11. A hose 14 has one end detachably connected to the vacuum cleaner main body 10, and a hand operation tube 20 is provided at the other end of the hose 14.

An extension tube 30 is detachably connected to the hand operation tube 20, and a connection tube 91 of a suction port body 90 is detachably connected to a distal end of the extension tube 30. Then, a suction opening (not shown) provided on the lower surface of the suction opening body 90 and the dust collecting filter 13 of the vacuum cleaner main body 10 communicate with each other via the connection pipe 91, the extension pipe 30, the hand operation pipe 20 and the hose 14. Then, the dust sucked by the suction port body 90 is sucked into the dust collecting filter 13 through the connection pipe 91, the extension pipe 30, the hand operation pipe 20 and the hose 14.

The hand operation tube 20 is provided with a handle portion 22 and an operation portion 23, and the operation portion 23 includes the electric blower 1.
There are provided an on / off switch 23a, a setting switch 23b for setting the power of the electric blower 11, and the like.

The extension pipe 30 is composed of an aluminum pipe (second pipe member) 31 and a resin pipe (first pipe member) 40. The pipe 31 can be stored in the pipe 40 or can be pulled out of the pipe 40.

As shown in FIG. 2, the pipe 31 is provided with a large-diameter joint 32 for connecting the connection pipe 91 of the suction port body 90 at the distal end of the pipe main body 32. And a bent flange portion 33 that is bent and formed. Since the flange portion 33 is curved, the flange portion 33 will not be dented even if it hits a hard object.

At the rear end of the pipe body 32, as shown in FIG. 3, a protrusion 34 for preventing rotation is continuously formed.
A plurality of recesses 35 are formed at predetermined intervals in an upper portion (in FIG. 2) of the pipe main body 32. FIG.
Reference numeral 36 denotes a stand stopper.

As shown in FIGS. 4 and 5, the pipe 40 is joined to a distal end of a pipe main body 41 having an inner diameter slightly larger than the outer diameter of the pipe main body 32 by joining a pipe having an inner diameter larger than the outer diameter of the pipe main body 32. A part 42 is provided and the pipe body 4
A mouth 4 to be inserted and connected into the hand control tube 20 at the rear of the
3 is provided. A groove 44 is formed in the pipe main body 41 along the axial direction. The protrusion 44 of the pipe 30 is engaged with the groove 44 as shown in FIG.
Are prevented from rotating in the circumferential direction with respect to the pipe 40, and the pipe 30 is slidable in the axial direction with respect to the pipe 40.

The air passage hole 46 of the pipe 40 has a step 4
7 are formed. As shown in FIG. 7, a slide operation unit 70 is provided on the outer peripheral surface of the joint 42 of the pipe 40.

The slide operation section 70 has a slide knob 72 movable in the direction of the arrow against a spring 71 and a locking projection 73 and is attached to the joint section 42 so as to be rotatable about a shaft section 74 as a fulcrum. Clamp member 75,
And a case 79 screwed to the joint portion 42. The case 79 is integrally formed with a locking portion 79A inserted into a locking hole 52 of a sleeve (annular member) 50 described later via a hole 42B provided in the joint portion 42.

On the lower surface of the slide knob 72, an inclined surface 76 is formed on the right side (in FIG. 7), which is inclined obliquely downward. The slide knob 72 is integrally formed with a lock member 80 in contact with an upper part of the locking projection 73.

The clamp member 75 is urged in a counterclockwise direction by a spring 77, and an R-shaped contact portion 78 is formed at one end of the clamp member 75 to contact the inclined surface 76. The locking projection 73 of the clamp member 75 engages with the concave portion 35 of the pipe main body 32 through a hole 42A provided in the joint portion 42 and a projection hole 51 of the sleeve 50 described later to fix the pipe 31. Thereby, the pipe 3
1 cannot be stored in the pipe 40 or pulled out from the pipe 40.

When the slide knob 72 is moved leftward (in FIG. 7) with a finger, the lock member 80 comes off from the upper part of the locking projection 73, and the slide knob 7
The second inclined surface 76 contacts the contact portion 78 of the clamp member 75 to rotate the clamp member 75 clockwise against the spring 77. By this rotation, the locking projection 73 of the clamp member 75 is disengaged from the concave portion 35 of the pipe main body 32, so that the pipe 31 can be further stored in the pipe 40,
It can be pulled out from inside 0.

The concave portion 35 of the pipe main body 32 is
When the finger is released from the slide knob 72 at a position opposing to the slide knob 72, the slide knob 72 and the clamp member 75 return to the state shown in FIG.

A cylindrical sleeve 50 made of resin, a seal ring 60 made of rubber or the like, and a stop ring (annular member) 61 made of hard resin are attached to the inner peripheral surface of the joint 42 of the pipe 40. ing. The inner diameter of the sleeve 50 is set to be the same as the outer diameter of the pipe body 30, and the pipe body 31 is slidably inserted in the sleeve 50 along the axial direction. The sleeve 50 is for holding the pipe main body 31 so as not to rattle, and for improving the sliding when the pipe 30 is pulled out and stored. The sleeve 50 also serves to prevent the pipe 31 from falling out of the pipe 40.

As shown in FIG. 8, the sleeve 50 is provided with a projection hole 51, a locking hole 52, a plurality of windows 53, and a cut 54 cut along the axial direction. The cuts 54 allow the sleeve 50 to expand so as to have a larger diameter. A step 55 is formed at the rear end of the sleeve 50 along the circumferential direction.

The tip of the locking portion 79A of the case 79 is in contact with the side surface 52A of the locking hole 52 of the sleeve 50.
The sleeve 50 is prevented from slipping out of the joint 42 of the pipe 40. As shown in FIG. 9, the seal ring 60 is formed by forming a ridge 62 along the circumferential direction on the inner peripheral surface of a cylindrical ring base 61. The tip portion (inner peripheral portion) 62a of the ridge portion 62 is formed in a sharpened state.

As shown in FIG. 10, the stop ring 65 is formed by forming a step 67 along a circumferential direction on a cylindrical ring 66.

As shown in FIG. 11, the seal ring 60 is sandwiched and fixed between the end of the sleeve 50 and the step 55 and the end of the stop ring 65 and the step 67. By this pinching, the pipe 3
When the sliding member 1 is slid in the axial direction, deformation of the ridge portion 62 of the seal ring 60 is prevented, and only the tip portion 62a is deformed to enhance the sealing performance.

When assembling the sleeve 50, the seal ring 60 and the stop ring 65, first, the sleeve 50, the seal ring 60 and the stop ring 65 are fitted into the rear part of the pipe 31, as shown by the chain line in FIG.

Although the projection 34 is formed at the rear of the pipe 31, the sleeve 50 can be expanded by the cutout 54, so that the sleeve 50 can be fitted into the rear of the pipe 31 and the fitting is easy. Becomes Further, since the seal ring 60 is made of rubber, the fitting can be easily performed. Although the stop ring 65 is made of a hard resin, the width thereof is short, so that the stop ring 65 can be press-fitted with a small force and fitted. If a cut is also provided in the stop ring 65, the fitting is further facilitated.

The sleeve 50, the seal ring 60
Then, the rear part of the pipe 31 in which the stop ring 65 is fitted is inserted into the joint part 42 of the pipe 40, and the stop ring 65 is connected to the air passage hole 46 of the pipe 40 as shown in FIG.
Of the sleeve 5 and the seal ring 60
0 and the stop ring 65. Thereafter, the slide operation unit 70 is assembled.

The case 79 of the slide operation unit 70 is
Is fixed to the joint 42 of the pipe 40 with
The locking portion 79A of the case 79 is provided on the side surface 52A of the locking hole 52 of the case 79.
The sleeve 50 is fixed in the joint 42 of the pipe 40 as shown in FIG.

As described above, since the curved flange 33 is provided at the distal end of the pipe 31, the flange 33 is depressed when it hits a hard object without attaching a protection member to the distal end. There is no problem, and the connection pipe 91 of the suction port body 90 cannot be connected. Moreover, the cut 5 is formed in the sleeve 50.
Since the sleeve 4 is provided, the sleeve 50 can be fitted to the rear portion of the pipe 31 and the fitting is easy, so that the sleeve 50 can be easily assembled.

[0034]

As described above, according to the present invention, even if a protection member is not attached to the tip of a metal pipe, the tip is not depressed, and an annular member such as a sleeve is formed. Can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a vacuum cleaner according to the present invention.

FIG. 2 is a sectional view showing a pipe of an extension pipe.

FIG. 3 is a cross-sectional view of the extension pipe of FIG. 2;

FIG. 4 is a longitudinal sectional view showing a pipe of an extension pipe.

FIG. 5 is a cross-sectional view of the pipe of FIG.

FIG. 6 is a side view showing an extension pipe.

FIG. 7 is an enlarged sectional view showing a part of the extension pipe.

FIG. 8A is a side view showing a sleeve. (B) It is the top view which showed the sleeve. (C) It is sectional drawing of a sleeve. (D) It is the elements on larger scale of a sleeve.

FIG. 9A is a sectional view showing a seal ring. (B) It is sectional drawing which expanded a part of seal ring.

FIG. 10 is a sectional view showing a stop ring.

11 is an enlarged sectional view of a part of FIG. 7;

FIG. 12 is an explanatory view showing an extension pipe of a conventional vacuum cleaner.

FIG. 13 is an explanatory view showing a conventional extension pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vacuum cleaner main body 14 Hose 20 Hand operation pipe 30 Extension pipe 31 Pipe (2nd pipe member) 40 Pipe (1st pipe member) 50 Sleeve (annular member) 60 Seal member 65 Stop ring (annular member)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 57-3193 (JP, U) JP-A 52-78376 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/24 F16L 27/12

Claims (2)

(57) [Claims] 1. A first pipe member connected to a hand-operated pipe connected to a cleaner body via a hose, and a first metal member connected to the distal end portion of the first pipe member so as to be able to advance and retreat and to be fixed. A second pipe member, a seal member provided between an outer peripheral surface of the second pipe member and an inner peripheral surface of the first pipe member, and a seal member attached to the inner peripheral surface of the first pipe member. An annular member fixed to a predetermined position on an inner peripheral surface of the member, and an electric cleaning device in which a protrusion for stopping rotation in a circumferential direction with respect to the first pipe member is formed outward at a rear end of the second pipe member. The extension pipe of the machine is characterized in that an outwardly projecting flange portion for preventing deformation is bent at the tip end of the second pipe member, and the annular member is provided with a cut cut in an axial direction. Extension tube for vacuum cleaner. 2. The electric cleaning apparatus according to claim 1, wherein said annular member is a cylindrical sleeve which holds the second pipe member slidably in addition to fixing the seal member in a predetermined position. tube.