JPH0350861Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to an air volume adjustment device for a vacuum cleaner.
In particular, the present invention relates to a device that adjusts air volume by opening and closing a communication port formed in a hose connection pipe.

(Prior Art) Conventionally, in the air volume adjustment device of this type of vacuum cleaner, as described in, for example, Japanese Utility Model Application Publication No. 51-131059, a device is installed at the tip of a hose connected to the main body of the vacuum cleaner. An air volume adjustment ring made of synthetic resin with an inlet formed thereon is elastically fitted to the outer circumferential surface of the connected connection pipe so as to be rotatable in the circumferential direction, and this adjustment ring is rotated to A structure is known in which the amount of air flowing in from the distal end opening of the hose can be adjusted by opening and closing the communication port.

By the way, with this structure, as shown in FIG. 11, even when the communication port 1 is closed, the airflow from between the connecting pipe 2 and the adjusting ring 3 does not hit the surface of the connecting pipe 2 or the adjusting ring 3. It flows into the connecting pipe 2 of the hose by just bending it twice. That is,
There is a problem in that air tends to leak from the communication port 1 even when there is no need for air to flow in through the communication port 1.

In addition, in the device having the structure described in the above publication, the adjustment ring is provided with a stopper located in the communication port to restrict the rotation range of the adjustment ring, and the outer peripheral surface of the connecting pipe and the inner peripheral surface of the adjustment ring are To,
A recess and a protrusion are provided to engage and disengage each other and hold the adjustment ring in the closed position, but providing such recesses and protrusions on the outer peripheral surface of the connecting pipe and the inner peripheral surface of the adjustment ring prevents airtightness. There is a problem that tends to lead to sexual deterioration.

Furthermore, in the device having the structure described in the above-mentioned publication, since the inlet of the adjustment ring is formed in a grid shape, there is a problem in that the noise generated when air passes through is increased.

There is also a known device in which the communication port or inflow port is formed in an elliptical shape and the air volume can be continuously adjusted by rotating the adjustment ring. If you do so, it is difficult to understand how much the air volume can be adjusted, making it difficult to use.

(Problems to be solved by the invention) In the above-mentioned conventional vacuum cleaner air volume adjustment device,
The structure is such that an adjustment ring, which is an adjustment body that opens and closes the communication port, is slidably fitted onto the connection pipe of the hose that forms the communication port, so that the connection pipe and the adjustment body There was a problem with unnecessary air leakage between the two.

The present invention is an attempt to solve the above problems, and is to provide a vacuum cleaner in which almost no unnecessary air leakage occurs between the connection pipe and the regulator that opens and closes the communication port of the hose connection pipe. The present invention provides an air volume adjustment device.

[Structure of the idea]

(Means for Solving the Problems) The air volume adjustment device for a vacuum cleaner of the present invention is installed on a hose connected to a vacuum cleaner body having a built-in electric blower, and adjusts the air volume flowing in from the opening at the end of the hose. In the air volume adjustment device for a vacuum cleaner to be adjusted, a connecting pipe having a communication port opened on the outer periphery of the distal end of the hose, and a space fixed to the outer periphery of the connecting pipe with a gap between the outer periphery of the connecting pipe and the outer circumference of the connecting pipe. a support body,
An adjusting body for opening and closing the communication port is provided in the gap between the connection pipe and the support body and is slidably held along the outer periphery of the connection pipe, and the adjustment body is provided to open and close the communication port on the outer periphery of the connection pipe. Grooves extending in the circumferential direction are formed on either side of the sandwiched sides and both sides of the support body, and fitting ribs are provided on the other side to be fitted and fixed to the grooves on both sides, and the grooves and the fitting ribs are connected to each other. The support body is fixed to the connecting pipe by fitting and fixing.

(Function) The air volume adjustment device for a vacuum cleaner of the present invention opens and closes the communication port provided in the hose connection pipe by sliding the adjustment body, and adjusts the air volume according to the object to be cleaned, such as the floor or curtain. , adjusts the amount of air sucked in from a suction port connected, for example, via an extension tube to the opening at the end of a hose connected to a vacuum cleaner body containing an electric blower. Then, the adjusting body is configured to create a leakage flow path by fitting the other fitting rib into both grooves of one of the connecting pipe and the supporting body and slidably sandwiching the connecting pipe and the supporting body. is bent, so that unnecessary air leakage hardly occurs between the adjusting body and the connecting pipe.

(Embodiment) The configuration of an embodiment of the present invention will be explained with reference to FIGS. 1 to 5.

First, the overall structure of the vacuum cleaner will be explained with reference to FIG.

Reference numeral 11 denotes a vacuum cleaner main body, which is formed in the shape of a case. Inside the vacuum cleaner main body 11, an electric blower 12 is disposed on the rear side, and a dust collection chamber 13 communicating with the suction side of the electric blower 12 is provided on the front side. Further, a connection port 14 is formed at the front of the cleaner body 11 facing the dust collection chamber 13 . Note that 15 is a power cord for supplying power to the electric blower 12.

Reference numeral 21 denotes a hose, which includes a flexible bellows-shaped hose body 22 and a substantially cylindrical hose provided at the rear end of the hose body 22 and removably fitted and connected to the connection port 14 of the vacuum cleaner body 11. It consists of a connecting pipe 23 and a bent, substantially cylindrical connecting pipe 24 provided at the front end of the hose main body 22.

Reference numeral 26 denotes a pair of extension tubes, each of which has a substantially cylindrical shape, and is adapted to be successively fitted and connected to the tip opening 25 of the connecting tube 24 of the hose 21 in a detachable manner.

Reference numeral 27 denotes a suction port body, which has a suction port (not shown) formed on its lower surface, and a connecting pipe 28 that communicates with this suction port and is removably fitted and connected to the front end of the extension pipe 26 at the rear thereof. It is provided.

Next, the configuration of the air volume adjusting device will be explained with reference to FIGS. 1 to 4.

On the front side of the peripheral surface of the connecting pipe 24 of the hose 21,
A circumferentially long communication port 31 is formed.
Furthermore, grooves 32 are formed on the outer circumferential surface of the connecting pipe 24 and extend in the circumferential direction, located in front and behind the communication port 31, respectively.

Reference numeral 33 denotes an adjustment body, which is formed of synthetic resin or the like into a plate shape that forms an arc when viewed from the front, and has a size that covers the communication port 31 of the connecting pipe 24, and the length in the transverse direction is the same as that described above. The distance is slightly smaller than the distance between both grooves 32 of the connecting pipe 24. At the center of the upper surface of this adjustment body 33, a knob 3 is provided.
4 is formed protrudingly. In addition, this adjustment body 33
Rectangular inlets 35 and 36 are formed at both ends of the inlet 35 and 36, respectively.
are located apart from each other by the length of the communication port 31 in the longitudinal direction.

Further, reference numeral 37 denotes a support, which is formed of synthetic resin or the like into a substantially cylindrical shape, and its inner diameter is approximately equal to the outer diameter of the connecting tube 24. A cutout 38 is formed in the lower part of the support 37. Further, an opening 39 having substantially the same shape as the communication port 31 is formed at the center of the upper part of the support body 37 . Furthermore, fitting ribs 40 are formed protruding from the front and rear edges of the inner circumferential surface of the support 37 to fit into both grooves 32 of the connecting tube 24, respectively. The fitting rib 40 is fitted with the groove 32 of the connecting tube 24 so that there is a gap between the fitting rib 40 and the outer circumferential surface of the connecting tube 24. .

A communication port 3 is provided on the outer peripheral surface of the connecting pipe 24.
At the same time, the support body 37 is fitted through the notch 38 by utilizing its elasticity, and both fitting ribs 40 of the support body 37 are fitted into both grooves 32 of the connecting pipe 24. The air volume adjusting device is assembled by fitting the air volume adjustment device. In addition, in this state, due to the contact between both ends of the fitting rib 40 and the groove portion 32,
A support body 37 is fixed to the connecting tube 24, and the adjustment body 33 is held between the support body 37 and the connecting tube 24 so as to be slidable in the circumferential direction.

Next, the operation of this embodiment will be explained.

During cleaning, the user slides the suction port body 27 onto a surface to be cleaned, such as a floor surface, while grasping the connecting pipe 24 of the hose 21. When the electric blower 12 in the vacuum cleaner main body 11 is driven, the dust sucked together with air from the suction port body 27 is guided to the dust collection chamber 13 in the vacuum cleaner main body 11 via the extension pipe 26 and the hose 21. It will be destroyed.

When it is desired to increase the suction force for cleaning floors, etc., the knob 34 of the adjuster 33 is positioned at the center of the opening 39 of the support 37. At this time, the inflow port 35 of the adjustment body 33 is located away from the communication port 31 of the connecting pipe 24 and the opening 39 of the support body 37, and the communication port 31 is closed. Therefore, no air flows in through the communication port 31, and all suction is performed through the suction port body 27, so that a strong suction force is obtained.

On the other hand, when it is desired to weaken the suction force for cleaning sofas, curtains, etc., the knob 34 is moved to the side. At this time, this knob 34 comes into contact with the side edge of the opening 39 of the support body 37, so that
The amount of movement of the adjustment body 33 is regulated. In this manner, when the knob 34 is in contact with the side edge of the opening 39, one of the inflow ports 35 and 36 of the adjustment body 33 overlaps the communication port 31 and the opening 39. Therefore, from the opening 39 to the inlet 3
5, or through the inlet 36 and the communication port 31, air flows into the hose 21, so the amount of suction air from the suction port body 27 decreases, and a weak suction force is obtained.

By the way, if the sizes of both the inflow ports 35 and 36 of the adjustment body 33 are made different, it depends on which inflow port 35 and 36 is superimposed on the communication port 31.
The air volume can be adjusted in three stages, including the state in which the communication port 31 is closed. For example, one inlet 35 is set to a size suitable for cleaning sofas and the like, and the other inlet 36 is set to a size suitable for cleaning curtains and the like. In use, as described above, when the knob 34 of the adjustment body 33 is moved to both ends of the opening 39 of the support body 37, the inflow ports 35 and 36 are overlapped with the communication port 31, so that Since the position of the knob 34 and the air volume clearly correspond to each other, it is easy to use.

Of course, both the inflow ports 35 and 36 of the adjustment body 33 may have the same size. With this structure, the air volume can be adjusted in two stages, but when adjusting the air volume, it is not necessary to pay much attention to the moving direction of the knob 34 of the adjustment body 33, so it is convenient in another sense.

Moreover, since each inlet 35, 36 is formed in the shape of a single hole, the noise generated when air passes through these inlets 35, 36 is small.

In addition, the sliding adjustment body 33 is held between the connecting pipe 24 and the support body 37 fixed to the connecting pipe 24,
In addition, since the support body 37 is fixed to the connection tube 24 by fitting both of its fitting ribs 40 with both grooves 32 of the connection tube 24, the connection tube 24, the adjustment body 33, and the support body 37 are fixed to the connection tube 24. There is almost no unnecessary air leakage from the gap. For example, as shown in FIG. 6, even if there is a gap between the connecting pipe 24, the adjustment body 33, and the support body 37, the airflow must bend at least four times when it hits the surface of each member. Since it does not flow into the connecting pipe 24, air leakage is less likely to occur, and in fact, since the support body 37 is fixed to the connecting pipe 24, there is almost no gap between the two.

In addition, in the above embodiment, the groove portion 32 is provided in the connecting pipe 24.
, a fitting rib 40 is formed on the support 37, and the support 37 is fixed to the connecting pipe 24 by fitting and fixing the groove 32 and the fitting rib 40. It is also possible to form a structure in which a fitting rib is formed, a groove is formed in the support 37, and the support 37 is fixed to the connecting pipe 24 by fitting and fixing the fitting rib and the groove.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 to 10.

In this embodiment, each pair of inflow ports 41 and 4 arranged in the longitudinal direction of the adjusting body 33 are provided on both sides in the longitudinal direction.
Openings 2, 43, and 44 are formed respectively.
Furthermore, convex portions 45 are formed to protrude from both end edges of the adjustment body 33 in the lateral direction.
On the other hand, a plurality of recesses 46 are formed on opposing surfaces of both fitting ribs 40 of the support body 37, respectively, to which the convex portions 45 of the adjustment body 33 are engaged and disengaged.

By engaging these convex portions 45 and concave portions 46, the adjusting body 33 is placed in a position where the communicating port 31 of the connecting pipe 24 is closed, and one inlet port 41 or inlet port 43 is superimposed on the communicating port 31. position, or 2
two inlets 41, 42 or inlets 43, 44
is held in a position where it is superimposed on the communication port 31.

According to this structure, the inflow ports 41, 42, 43,
By providing four 44, the air volume can be increased by, for example, 5.
In addition to making it possible to adjust the steps, by providing the support body 37 and the adjustment body 33 with a concave portion 46 and a convex portion 45 that hold the adjustment body 33 in a predetermined position,
When operating the adjusting body 33, the position of the adjusting body 33 and the air volume can be clearly correlated, improving operability. Moreover, since the protrusion 45 and the recess 46 are provided on the surfaces of the adjustment body 33 and the support body 37 that are opposed in the axial direction, rather than on the surfaces that face each other in the radial direction, a decrease in airtightness is not caused.

[Effect of idea]

According to the present invention, the adjusting body for opening and closing the communication port provided in the connecting pipe of the hose is slidably sandwiched between the connecting pipe and the support fixed to the connecting pipe. , the structure is such that a slidable adjustment body covering the communication port is covered with a support body, and the connecting pipe and the support body are connected to grooves formed on either side of the communication port and on both sides of the support body, and grooves formed on the other side. Since it is fixed by fitting and fixing with the fitted fitting rib, even if there is a gap between the connecting pipe, the adjusting body and the supporting body, the airflow is bent along the surface of the groove and the fitting rib. Air leaks are less likely to occur, and unnecessary air leaks from between the connecting pipe and the regulating body are almost non-existent.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an air volume adjustment device for a vacuum cleaner showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 2, FIG. 5 is a perspective view of the entire vacuum cleaner, FIG. 6 is an explanatory diagram of the operation of the apparatus of the above embodiment, and FIG. 7 is a diagram of an adjustment body showing another embodiment of the present invention. 8 is a perspective view of the same support body, FIG. 9 is a cross-sectional view taken from the side shown in FIG. 7, FIG. 10 is a cross-sectional view taken from the side shown in FIG. 8, and FIG. It is an explanatory diagram of an example of an operation. 11...Vacuum cleaner body, 12...Electric blower, 21...Hose, 24...Connecting pipe, 25...
Tip opening, 31...Communication port, 32...Groove, 3
3... Regulator, 35, 36, 41, 42, 43,
44...Inflow port, 37...Support body, 40...Fitting rib.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An air volume adjustment device for a vacuum cleaner that is installed on a hose connected to a vacuum cleaner body with a built-in electric blower and that adjusts the air volume that flows in from the opening at the end of the hose, A connecting pipe having a communication port opened on the outer periphery of the distal end of the hose, a support fixed to the outer periphery of the connecting pipe with a gap between the outer peripheral surface of the connecting pipe, and the connecting pipe and the support. an adjusting body that is slidably held in the space between the connecting pipe and opens and closes the communication port, and is provided with an adjusting body that is slidably held along the outer periphery of the connecting pipe and opens and closes the communication port; A groove extending in the circumferential direction is formed on either side of the connecting pipe, and a fitting rib is provided on the other side to be fitted and fixed in the groove on both sides, and the fitting and fixing of the groove and the fitting rib allows the connection pipe to be fixed. An air volume adjustment device for a vacuum cleaner, characterized in that a support is fixed to the vacuum cleaner. (2) The air volume of the vacuum cleaner according to claim 1, wherein the regulator has a plurality of inflow ports each having a different size and superimposed on the communication port of the connecting pipe. Regulator.