JPH0790006B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used by connecting to a cleaner body through a flexible hose, an extension pipe, etc. The present invention relates to a suction port body of a cleaner to which a brush body having brush bristles that can be retracted from the bottom surface of the case is attached.

[Prior Art] Conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 60-194931, there is a suction port body in which brush bristles are projected and retracted from the bottom surface of the suction port body case depending on the type of cleaning surface.

As shown in FIG. 9, this suction port body is provided with a moving wheel 3 on the bottom surface of a suction port body case 1 to which a sever tube 2 is connected, and at the same time, communicates with the suction port 4 and this suction port 4. The suction groove 5 is formed. The suction groove 5 extends in the longitudinal direction of the suction port body case 1 and reaches both ends of the suction port body case 1 to be opened. Dust absorption through the end openings at both ends is effective for operating a corner of a room or the like.

Further, inside the suction port body case 1, there are provided brush bodies located on the front and rear sides of the suction groove 5 and having the bristles 6. When cleaning the tatami mat or the like, the brush bristles 6 are projected from the bottom surface of the suction port body case 1 so that the case 1 and the cleaning surface do not come into contact with each other, thereby preventing the cleaning surface from being damaged. Also, when cleaning carpets, etc.
The brush bristles 6 are immersed in the suction port body case 1, thereby improving the running property of the suction port body.

Also, by adjusting the gap with the floor surface (cleaning surface) in response to changes in the suction force of the vacuum cleaner body, a constant suction force can be obtained, or the suction force can be changed depending on the floor surface condition and the type of dust. A suction port body capable of adjusting the pressure is known from Japanese Utility Model Publication No. 51-22863.

The technique described in this publication is a valve that adjusts a gap between the suction inlet body case having contact portions (brushes) that come into contact with the floor surface at front and rear edges and that always protrudes from the lower surface of the case and the bottom surface. The body is vertically movable and can be fixed at any position. The valve body has a U-shaped cross-section that is vertically moved by being fitted to the outer surface of a side wall that separates the front and rear sides of the negative pressure chamber, and the lower end edge of the valve body always projects downward from the lower end of the side wall.

Therefore, in this technique, the valve body is raised,
By increasing the distance between the bottom edge and the floor surface, it is possible to collect dust with a large amount of suction air, and when the suction force of the main body of the vacuum cleaner decreases, lower the valve disc to separate the clearance from the floor surface. By reducing the size, the flow velocity of the suction air can be increased to collect dust, and thus a constant suction force can be obtained.

[Problems to be Solved by the Invention]

In the suction port body described in JP-A-60-194931, when the brush bristles 6 provided on the brush body are protruded from the bottom surface of the suction port body case 1, the brush bristles 6 and the cleaning surface come into contact with each other.
Since a gap is created between the bottom surface of the suction port case 1 and the cleaning surface, the amount of sucked air increases. Moreover, at this time,
Air is also sucked in from between the bristles 6 protruding from the bottom surface of the suction inlet body case 1.

Therefore, there is a problem that the degree of vacuum in the space surrounded by the bottom surface of the suction port case 1, the brush bristles 6, and the cleaning surface is lowered, and particularly the dust suction force at both ends of the suction groove 5 is reduced.

Further, in the suction port body described in Japanese Utility Model Laid-Open No. 51-22863, the valve body side walls on the front and rear sides of the valve body are always projected from the lower surface of the suction port body case through the openings provided in the lower case. Therefore, the degree of vacuum of the negative pressure chamber can be adjusted by adjusting the protrusion size. However, since the valve body is provided so as to straddle the negative pressure chamber, the opening cross-sectional area of the opening portions at both ends of the negative pressure chamber cannot be changed by this valve body.

Therefore, the change in the degree of vacuum caused by the vertical movement of the valve body has a limited effect on the openings at both ends of the negative pressure chamber, and the room opened using the part opened at the end face of the suction port case is used. There is a problem in that dust cannot be sufficiently absorbed in the corners formed by the floor and the wall such as tatami mats.

Moreover, in the suction port body disclosed in Japanese Utility Model Laid-Open No. 51-22863, the brush is always biased by the compression spring so as to project from the lower surface of the lower case, and the floor surface (cleaning surface) It does not allow the bristles to appear and disappear according to the type. By the way, as shown in the above-mentioned Japanese Patent Laid-Open No. 60-194931, there is known one that causes brush bristles to appear and disappear.
However, since the suction port body adjusts the distance between the valve body side wall of the valve body and the floor surface, the valve body must be separated from the floor surface. In order to realize such a condition, it is necessary to float and hold the valve body from the floor surface with the brush bristles, and if this condition is ignored, the invention of Japanese Utility Model Laid-Open No. 51-22863 is established. I don't get it. Therefore, the technique of retracting the brush bristles cannot be applied to the device disclosed in Japanese Utility Model Publication No. 51-22863.

Further, if it can be applied, since the operation of retracting the brush bristles and the operation of moving the valve body up and down are separate, the operation becomes cumbersome, and the brush bristles are projected so that the vacuum degree of the negative pressure chamber is increased. It is conceivable that the valve body is erroneously in the raised position when the pressure is lowered and the dust suction force at the end opening of the negative pressure chamber is reduced.

An object of the present invention is to solve the above-mentioned problems and to obtain a suction port body of a cleaner capable of adapting the dust suction force at the end opening of the suction groove by interlocking with the switching of the protruding and retracting state of the brush bristles. It is in.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the suction port body of the vacuum cleaner of the present invention includes a suction port body case, a suction port located at a central portion of a bottom surface of the case, and a suction port body case communicating with the suction port. A suction groove that is opened at both longitudinal ends of the suction opening body case, and a brush body having brush bristles that are located on both front and rear sides of the suction groove and that emerge from the bottom surface of the suction opening body case. A movable adjusting body, which is located in the vicinity of the end opening of the suction groove and is capable of varying the opening cross-sectional area of the end opening, is provided respectively, and the brush bristles of the brush body are provided in the suction port body case. By the interlocking means for interlocking the opening cross-sectional area changing operation of the adjusting body, the adjusting body is also made to protrude from the suction groove when the brush bristles protrude from the bottom surface of the suction inlet body case, and the adjusting body is made to move when the brush bristles are retracted. Withdraw from the suction groove It is intended to be.

[Work]

In the present invention, the interlocking means interlocks the movement of the brush bristles of the brush body with the operation of varying the opening cross-sectional area of the adjustment body,
When the brush bristles are immersed in the suction port case, the adjuster is retracted from the suction groove. In addition, the state in which the brush body is lowered to project the brush bristles from the bottom surface of the suction port body case, in other words, the degree of vacuum of the space between the brush bristles and the suction port body case and the floor surface is lowered. In this case, the adjusting body protrudes with respect to the suction groove to reduce the opening cross-sectional area of the end opening of the suction groove and increase the flow velocity of the air sucked from the end opening.

〔Example〕

An embodiment of the suction port body according to the present invention will be described with reference to FIGS. 1 to 4.

In FIG. 3, reference numeral 11 denotes a suction port body case, which is composed of a joint pipe 12, an upper case 13, and a lower case 14 which are rotatably provided in the vertical direction. Brush body
15 and a brush adjusting body 16 are provided respectively.

The brush body 15 has U-shaped brush bristles 17 (A) and 17 (B) and cams 18 and 18, and the cams 18 and 18 have three engaging portions 19 (A) having different height positions, 19 (B) are formed respectively. Reference numerals 20 and 20 are guide holes provided in the brush body 15. The brush adjusting body 16 is placed on the brush body 15, and each of the brush adjusting bodies 16 is provided with a claw 21 that selectively engages with the engaging portion 19 (A), 19 (B), 19 (C). Elastic body 22, 22 at the tip
And a knob 23 for operating the brush adjusting body 16 from the outside are integrally formed. The knob 23 projects from the opening provided in the upper case 12 to the outside of the suction port case 11.

The lower case 14 is provided with brush insertion openings 25, 25 into which the brush bristles 17 (A), 17 (B) are inserted, respectively, and a suction port 26 formed at the center of the bottom surface of the lower case 14.
A partition 27 located above (see FIG. 1) is provided. The partition wall 27 supports the joint pipe 12 so as to be vertically rotatable.

The guide holes 20 and 20 provided in the brush body 15 are the lower case.
The brush body 15 is vertically fitted by being loosely fitted to the guide bosses 28, 28 of 14 and the brush body 15 is constantly urged upward by the springs 29, 29.

In this way, brush body 15, brush adjustment body 1 on the lower case 14
6, the joint pipe 12 and the upper case 13 are placed, and the upper case 13 and the lower case 14 are connected via the bumper 30 to form a suction port body.

The bottom surface of the suction port case 11 is shown in FIGS. 1 and 2. 31
Is a suction groove located between the front and rear brush bristles 17 (A) and 17 (B) and communicating with the suction opening 26 and extending to both longitudinal ends of the suction opening body case 11. Form end openings 32, 32 that open to the side surface of the suction port body case 11.

33 is a convex portion integrally formed on the side wall 14a of the lower case 14,
It is formed to project at the same height as the outer surface of the bumper 30 with respect to the side wall 14a, and is flush with the side projecting end surface 30a of the bumper 30. When the corners of the room are dust-cleaned by the protrusions 33, the gaps for the protrusions of the bumper 30 generated between the wall and the end openings 32, 32 are closed to absorb dust at the end openings 32, 32. Can be prevented.

Reference numeral 34 denotes an adjusting body, which is integrally provided on the lower surfaces of both end portions in the longitudinal direction of the brush body 15 and is interlocked with the retracting movement of the brush bristles 17 (A) and 17 (B) accompanying the vertical movement of the brush body 15. ,
It is possible to project into the suction groove 31 and retract from the suction groove 31. Therefore, in this embodiment, the brush body 15
Also serves as interlocking means for interlocking the retracting operation of the brush bristles 17 (A), 17 (B) and the opening cross-sectional area varying operation of the end openings 32, 32 of the suction groove 31 by the adjusting body 34.

The operation will be described based on the above configuration. When cleaning a carpet or the like, by operating the knob 23, the claws 21, 21 provided on the brush adjusting body 16 are engaged with the engaging portions 19 (A) to 19 (C) formed on the cams 18, 18. The engaging portions 19 (C) and 19 (C) at the lowest position are engaged with each other.

Then, the brush bristles 17 (A) and 17 (B) do not project from the bottom surface of the suction port body case 11, and at the same time, the adjusting body 34 provided on the brush body 15 is formed on the bottom surface of the suction port body case 11. The suction groove 31 is arranged in a retracted state so as not to project, and forms the same plane as the back surface of the suction groove 31 (see FIG. 2). When cleaning is performed in this state, the cleaning surface comes into contact with the bottom surface of the lower case 14, and dust is sucked through the suction groove 31.

Next, when cleaning the tatami mat or the like, the knob 23 is operated to move the brush adjusting body 16 in the lateral direction so that the claws 21, 21 are engaged with the engaging portions 19 (A), 19 (A) or 19 (B). , 19 (B) by selectively engaging the brush body 15 with the spring 29.
And push it down, which results in brush bristles 17 (A), 17
(B) is projected from the bottom surface of the suction inlet case 11.

As the brush body 15 is pushed down at this time, the adjustment body 34
Is interlocked with the front and rear brush bristles 17 (A) and 17 (B) to project into the suction groove 31 (see FIG. 1). Nail 21,
When the claws 21 and 21 are engaged with the engaging portions 19 (A) and 19 (A), respectively, compared with the case where 21 is engaged with the engaging portions 19 (B) and 19 (B), respectively. The amount of protrusion of the brush bristles 17 (A) and 17 (B) from the bottom surface of the suction port body case 11 is large. Therefore, the adjusting body 34 also engages the claws 21, 21 with the engaging portions 19 (A), 19
The amount of protrusion into the suction groove 31 is larger when engaged with (A).

When the claws 21, 21 are engaged with the engaging portions 19 (A), 19 (A),
That is, even when the adjusting body 34 projects most in the cleaning surface direction, the adjusting body 34 does not project from the bottom surface of the suction port body case 11, so that the end opening 32 of the suction groove 31 can be completely blocked. Absent.

When the brush bristles 17 (A) and 17 (B) are projected from the bottom surface of the suction port body case 11 as described above, when the adjusting body 34 is not provided, as described above, A gap is created between the bottom surface and the cleaning surface, and the degree of vacuum in the space surrounded by the lower surface of the suction port case 11 and the brush bristles 17 (A), 17 (B) and the cleaning surface is reduced, and in particular the suction groove 31 The dust absorption at both ends of the will decrease.

However, in the suction port body case 11 having the above-mentioned configuration, the adjustment body 34 is projected into the suction groove 31 in association with the projection of the brush bristles 17 (A) and 17 (B), so that the degree of vacuum of the space is increased. However, since the flow velocity of the air sucked in the end openings 32, 32 of the suction groove 31 can be increased, it is possible to prevent the dust suction force from decreasing at both ends of the suction groove 31.

Moreover, as described above, the retracting operation of the brush bristles 17 (A) and 17 (B) and the operation of changing the opening cross-sectional area of the end openings 32 of the suction groove 31 by the adjusting body 34 are linked. It is not necessary to individually perform the retracting operation and the opening cross-sectional area variable operation, and can be performed in a single operation, which is convenient and makes it possible to use brush bristles.
When 17 (A) and 17 (B) are projected from the bottom surface of the suction port body case 11, the end openings 32, 32 at both ends of the suction groove 31 must be provided.
It is possible to reduce the opening cross-sectional area, and there is no inconsistency between the projecting and retracting operation and the opening cross-sectional area varying operation.

In addition, in this embodiment, in order to obtain the interlocking relationship, the brush body 15 having the brush bristles 17 (A) and 17 (B) is provided with an adjusting body.
Since the 34 is integrated, the configuration can be simplified.

Further, in the present embodiment, the adjusting body 34 does not protrude from the bottom surface of the suction port body case 11 even when the opening cross-sectional areas of the end openings 32, 32 of the suction groove 31 are narrowed, Is always located on the upper side, so that the bottom of the suction case body 11 is on the lower side and the suction body is dropped, or if there is a hard projection or step such as a sill on the cleaning surface. Also in the above, the adjusting body 34 does not hit the floor surface and is damaged, so that the operation of changing the opening cross-sectional area by the adjusting body 34 can be guaranteed for a long period of time.

Further, in the present invention, the adjusting body 34 can close the front half or the rear half of the suction groove 31 as shown in FIGS. 5 to 8 to narrow the opening cross-sectional area of the suction groove 31. is there. In this way, the adjusting body 34 is opened at the end of the suction groove 31.
It is possible to form the same plane as the bottom surface of the suction port body case 11 without completely closing the suction port case 11. In this case, since the tip of the adjusting body 34 presses the rising of the tatami mat or the like due to the suction pressure, the suction groove is formed. It is possible to prevent the opening cross-sectional areas of the end openings 32, 32 of 31 from narrowing. The configuration other than the points described above is the same as that of the first embodiment.

〔The invention's effect〕

As described above, according to the suction port body case of the present invention, the brush bristles that can be retracted from the bottom surface of the suction port body case and the retractable adjustment body are provided in the suction groove. Since the adjusting body is made to project in the suction groove in conjunction with the projecting operation to reduce the opening cross-sectional area of the end opening in the suction groove, the suction opening when the brush bristles are projected Regardless of the decrease in the degree of vacuum between the body case and the cleaning surface, the flow velocity of the air sucked from the end opening of the suction groove is increased so that the end opening of the suction groove with the brush bristles protrudes. It is possible to prevent a decrease in the dust absorption power of.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a perspective view of an essential part showing a state in which the brush bristles are projected, and FIG. 2 is the same part in a state where the brush bristles are retracted. Is a perspective view, FIG. 3 is an overall perspective view, and FIG. 4 is an exploded perspective view. 5 to FIG. 8 show another embodiment of the present invention, FIG. 5 and FIG. 6 are perspective views showing the essential parts in different states, and FIG. 7 is a VII-VII line in FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG. 9 is a bottom view showing a conventional example. 11 …… Suction mouth case, 15 …… Brush body (interlocking means),
17 (A), 17 (B) …… Brush bristles, 23 …… Knobs, 26…
… Suction port, 31 …… Suction groove, 32 …… End opening, 34 …… Adjuster.

Claims (1)

[Claims] 1. A suction port body case is provided, and a suction port opening in a cleaning surface direction is provided at a central portion of a bottom surface of the suction port body case, and is connected to the suction port in a longitudinal direction of the suction port body case. Alongside the opening extending in the cleaning surface direction, a suction groove having end openings that open at both ends in the longitudinal direction of the suction port body case is formed on the bottom surface of the suction port body case, In the suction port body case, a brush body having brush bristles protruding and retracting from the bottom surface of the suction port body case on both the front and rear sides of the suction groove, and the end opening of the suction groove located near the end opening of the suction groove. A movable adjusting body that changes the opening cross-sectional area is provided, and the retracting operation of the brush bristles of the brush body and the opening cross-sectional area changing operation of the adjusting body are interlocked by being operated from the outside of the suction opening body case. Interlocking means to By this interlocking device, when the brush bristles of the brush body project from the bottom surface of the suction port body case, the adjusting body is projected to the suction groove to reduce the opening cross-sectional area of the end opening, and the brush body The suction port body of the vacuum cleaner, wherein the adjusting body is retracted from the suction groove when the bristles of the brush are immersed.