JPH0631642U - Vacuum cleaner suction body - Google Patents

Abstract

(57) [Abstract] [Purpose] Suction of an electric vacuum cleaner that can more reliably prevent the rotary cleaning body from bending during rotation while achieving a reduction in size of the rotary cleaning body without thickening the rotary shaft portion. Provide the mouth. A suction chamber 12 having a suction port 14 opening to a bottom surface 11a is formed, and the suction chamber 12 has a plurality of flexible blades 19 radially extending from a rotary shaft portion 18 and a suction port. In the suction port body of the electric vacuum cleaner in which the rotary cleaning body 13 rotatably supported so as to face the rotary shaft 14 is mounted, the rotary cleaning body 13 is located along the rotary shaft portion 18 and between the blades 19 It has a shaft 22 that is compressed and stretched between receiving portions 21 that fixedly hold both ends of the portion 18 and that applies tensile tension to the rotating shaft portion 18 and the blade 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suction port body of an electric vacuum cleaner having a rotary cleaning body.

[0002]

[Prior art]

 Conventionally, the suction chamber has a suction port formed on the bottom surface, and the suction chamber has a plurality of blades extending radially from the rotating shaft and is rotatably supported by the suction port while facing the suction port. BACKGROUND ART A suction port body of an electric vacuum cleaner equipped with a cleaning body is known.

The rotary cleaning body 1 shown in FIG. 5 has four blades 3 formed to extend in a cross-shaped cross section in four directions orthogonal to the rotary shaft portion 2, and at the same time, the rotary shaft portion 2 Between the two receiving portions 4 (on the other hand not shown) fixed to and holding the rotary shaft portion 2 at both ends of the rotary shaft portion 2 are located between the blades 3 and are located around the rotary shaft portion 2 and at the same time. A shaft 5 along 2 is suspended.

With this shaft 5, even if the rotary cleaning body 1 is made of, for example, an elastic body, it is possible to obtain a strength capable of preventing bending during rotation without making the rotary shaft portion 2 thick. It becomes possible for the entire surface of the blade 3 to be brought into close contact with the surface to be cleaned without the blade 1 bending during rotation, and it is possible to downsize the entire blade while ensuring a sufficient scraping function of the blade 3.

[0005]

[Problems to be solved by the device]

 However, since the shaft 5 spanned between the receiving portions 4 resists the flexure during rotation only due to the rigidity of the shaft 5 itself due to its thickness, etc. It is necessary to make the rotary shaft portion 2 as thick as possible in order to prevent the bending of the rotary shaft more reliably, and the thicker the rotary shaft portion 2, the more difficult it is to downsize the rotary cleaning body 1. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the size of the entire rotary cleaning body without increasing the thickness of the rotary shaft portion, and to rotate the rotary cleaning body. The purpose of the present invention is to provide a suction port body of an electric vacuum cleaner that can more reliably prevent the bending of the vacuum cleaner.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the suction port body of the vacuum cleaner according to the present invention has a suction chamber having a suction port that opens on the bottom surface, and the suction chamber extends radially from the rotary shaft portion. In a suction port body of an electric vacuum cleaner having a plurality of flexible blades and equipped with a rotary cleaning body rotatably supported to face the suction port, the rotary cleaning body is the rotary shaft. A shaft that is placed along the portion and between the blades and is compressed and stretched between the receiving portions that fixedly hold both ends of the rotary shaft portion and that applies tensile tension to the rotary shaft portion and the blade. It is characterized by

[0008]

[Action]

 Due to the suction port body of the electric vacuum cleaner having the above structure, a centrifugal force acts on the rotating shaft part and the central part in the longitudinal direction of the shaft as the rotating cleaning body rotates, and the rotating shaft part and the shaft arc outward. However, the shaft is prevented from bending against the force of the repulsive force that tries to expand, and the rotating shaft part receives tensile tension from the shaft on both receiving parts. As a result, since the flexure is prevented, it is possible to prevent the flexure during rotation of the rotary cleaning body while reducing the size of the rotary cleaning body as a whole without thickening the rotary shaft portion.

[0009]

【Example】

 An embodiment of a suction port body of an electric vacuum cleaner according to the present invention will be described below with reference to the drawings.

The suction port body 10 of the electric vacuum cleaner shown in FIG. 1 has a suction chamber 12 formed in the suction port body 11, and the suction chamber 12 is rotated by a drive source (not shown). The rolling cleaning body 13 is attached.

The suction chamber 12 is formed inside the suction port body 11 and has a suction port 14 that opens to a bottom surface 11 a of the suction port body 11. The suction chamber 12 communicates with a connecting portion 15 provided on the rear end side of the suction port body 11, and by connecting an extension pipe and a connecting hose (not shown) to the connecting portion 15, the suction chamber 12 A communication passage is formed from 12 to the suction port 14 and continues to the dust collection chamber (not shown) of the cleaner body.

Front wheels 16a are mounted on both sides of the front end of the bottom surface 11a, rear wheels 16b are mounted on both sides of the rear end, and a pair of drive wheels 17 are mounted at the approximate center of the bottom surface 11a. There is.

As shown in FIG. 2, the rotary cleaning body 13 is made of a flexible material and has four blades 19 which are integrated with the rotating shaft portion 18 and extend radially from the rotating shaft portion 18. Have

The rotary shaft portion 18 is formed to be slightly longer than the blade 19, and has a protruding end 18 a protruding outward from both ends of the blade 19. A pair of locking projections 20 that lock in locking recesses 28 described later are formed at the diametrical positions on both ends of the rotary shaft portion 18 (see FIG. 3). The blade 19 is formed as a thin plate that extends in a cross-shaped cross section in four directions orthogonal to the rotation shaft portion 18.

As shown in FIGS. 3 and 4, a receiving portion 21 into which the protruding end 18a of the rotating shaft portion 18 is fitted is attached to both ends of the rotating shaft portion 18, and at the same time, both receiving portions are attached. Between the parts 21, four metal shafts 22 which are located between the blades 19 and which are located around the rotary shaft part 18 and which are stretched along the rotary shaft part 18 are mounted. (See Figure 2).

The shaft 22 has an outer diameter substantially the same as that of the rotary shaft portion 18, and is formed to be longer than the blade 19 so that both ends thereof are projected to the outside of the blade 19 (see FIG. 3). ).

The receiving portion 21 is formed of a columnar body having an enlarged diameter portion 22 on the one end face 21 a side, and is rotatably incorporated in the enlarged diameter portion 22 into a recess 22 a opening on the one end face 21 a side. The rotating portion 23 forming the end surface 21a is attached (see FIG. 4).

The rotating portion 23 has a bearing 24 projecting from one end surface 21 a. One end of the rotating portion 23 is rotatably supported by the bearing 24 and the other end of the rotating portion 23 is connected to the enlarged diameter portion 22. It can be freely rotated with respect to the receiving portion 21 via the fixed connecting shaft 25 (see FIG. 4).

Further, in the center of the receiving portion 21 on the side of the other end surface 21 b, there is a shaft recess 26 into which the protruding end 18 a of the rotary shaft 18 is inserted and fitted, and a shaft recess around the shaft recess 26. Shaft recesses 27 into which the distal ends of the shafts 22 are inserted and fitted are formed at four orthogonal positions with 26 as intersections. A pair of locking recesses 28 for locking the locking projections 20 are formed in the inner part of the shaft recess 26, and the depth of the shaft recess 27 is such that the shaft 22 protrudes from the blade 19 of the shaft 22. It is formed shorter than the length (see FIG. 3).

Then, both ends of the shaft 22 are attached to the shaft recesses 27, the projecting ends 18a of the rotary shaft 18 are attached to the shaft recesses 26, and the bearings 24 are fixed to the suction port body 11. The four shafts 22 are sandwiched by the two receiving portions 21 mounted on both sides of the rotating shaft portion 18 together with the rotating shaft portion 18 (see FIG. 4).

At this time, the protruding end 18a is pressed and deformed into the locking projection 20 to be inserted into the shaft recess 26, and is positioned in the locking recess 28 so that the locking projection 20 returns to its original shape. The locking projection 20 is locked in the locking recess 28, and in addition, the rotary shaft portion 18 and the both receiving portions 21 are integrated by fixing the locking projection 20 in a locked state using an adhesive or the like. .

Further, by fixing the bearing 24 to the suction port body main body 11 with the rotary shaft portion 18 and the four shafts 22 being sandwiched between the receiving portions 21, the rotary cleaning body 13 can be sucked into the suction port 14. It is rotatably mounted facing the front (see FIG. 1).

Therefore, the shaft 22 stretched along the rotary shaft portion 18 is compressed between the receiving portions 21 and the central portion is curved, that is, both ends of the rotary shaft portion 18 are pulled outward. At the same time, the blade 19 is also held in a state where both ends are pulled outward, and the rotary shaft portion 18 and the blade 19 are placed in a state in which tension is applied to the shaft 22 respectively. Retained (see FIG. 2).

Next, the operation of the suction port body of the electric vacuum cleaner having the above structure will be described.

When cleaning a surface to be cleaned such as a carpet using the suction port body 10 of the electric vacuum cleaner, the rotary cleaning body 13 is driven to rotate. Due to the scraping action of the blade 19 in accordance with the rotation of the rotary cleaning body 13, dust that has entered the inside of the fur such as a carpet can also be sucked in efficiently from the suction port 14.

At this time, a centrifugal force acts on the central portion in the longitudinal direction of the rotary shaft portion 18 and the shaft 22 as the rotary cleaning body 13 rotates, so that the rotary shaft portion 18 and the shaft 22 draw an arc toward the outside. However, the shaft 22 opposes the repulsive force that tends to expand against the force that tends to bend, and the shaft 22 is prevented from bending, and the rotary shaft portion 18 is integrated with the rotary shaft portion 18. The tensile force of the shaft 22 acts on the receiving portion 21 to prevent the bending.

For this reason, it is possible to more reliably prevent the rotary cleaning body 13 from bending during rotation while reducing the size of the rotary cleaning body 13 as a whole without thickening the rotary shaft portion 18.

Similarly, when the tensile tension by the shaft 22 acts on the rotary shaft portion 18, the tensile tension also acts on the blade 19, and the rotary shaft portion 18 is thinned, so that the rotary shaft portion 18 has an outer end. The blade 19 which has a longer distance to the edge and is easily deformed is given a rigidity by being in a tensioned state, and sufficient scraping is possible.

[0029]

[Effect of device]

 Since the suction port body of the electric vacuum cleaner according to the present invention has the above-mentioned structure, the rotary cleaning body can be downsized without increasing the thickness of the rotary shaft portion, and the rotary cleaning body can be prevented from bending during rotation. You can be sure.

[Brief description of drawings]

FIG. 1 is a bottom view of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a perspective view of a rotary cleaning body.

FIG. 3 is an explanatory diagram showing a mounting state of a receiving portion and a rotating shaft portion.

FIG. 4 is a partial perspective view of a rotary cleaning body integrated with a receiving portion.

FIG. 5 is an explanatory diagram of a rotary cleaning body in a suction port body of a conventional electric vacuum cleaner.

[Explanation of symbols]

 10 Vacuum Cleaner Suction Port Body 11a Bottom 12 Suction Chamber 13 Rotating Cleaning Body 14 Suction Port 18 Rotating Shaft Section 19 Blade 21 Receiving Section 22 Shaft

Claims (1)

[Scope of utility model registration request] 1. A suction chamber having a suction port formed on a bottom surface thereof, the suction chamber having a plurality of flexible blades radially extending from a rotary shaft portion and facing the suction port. In the suction port body of the electric vacuum cleaner in which the rotary cleaning body rotatably supported by the rotary cleaning body is mounted, the rotary cleaning body is located along the rotary shaft portion and between the blades, and A suction port body for an electric vacuum cleaner, comprising a shaft that is compressed and stretched between receiving portions that fix and hold both ends and that applies a tensile tension to the rotating shaft portion and the blade.