JPS63135115A - Electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum cleaner, and in particular to a suction mouthpiece with a rotating brush used for cleaning carpets, etc., which has an electric suction mouthpiece in which the rotating brush is driven by a motor. related to things.

[Conventional technology]

Conventionally, there is a suction spout that uses a rotating brush to scrape up hard-to-remove dust on carpets to improve suction performance. The driving sources for this rotating brush include an air turbine brush using suction airflow and an electric suction port using a motor. tS
Compared to air turbine brushes, type suction ports provide stronger torque and are able to scrape up dust even on long-pile carpets, providing powerful suction performance on carpets. The external connection cord was fixed to the extension tube or hose, and connected to the outlet provided on the vacuum cleaner body to power the motor and drive it, but with the external connection cord fixed to the extension tube or hose. Also, it was troublesome to connect everything from the electric suction spout to the extension pipe and hose, making it inconvenient to use. In addition, with devices that have a fixing device that fixes each connection, air leaks easily occur at the connections, or if the fitting parts are fitted tightly and accurately in an attempt to prevent air leaks, the vacuum cleaner If dust or the like adheres to the mating surface when using a mating mat, there has been a problem that mating becomes impossible.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not give consideration to simplifying the connection of each component, and has a problem in terms of usability.

An object of the present invention is to provide an extension tube that allows easy connection between an electric suction port, an extension tube, a hose, and a vacuum cleaner body, has a simple structure with little air leakage, and is easy to assemble.

An object of the present invention is to provide a vacuum cleaner having a hose and an electric suction port.

[Means for solving problems]

The above purpose is achieved by rotatably providing a retaining ring on one of two pipes connected at a connecting portion such as an extension pipe, and providing an engaging protrusion on the other pipe that engages with the groove of the retaining ring. achieved.

[Effect]

The groove of the above-mentioned retaining ring is formed by a retaining rib,
As the retaining ring rotates, the engaging protrusion of the other pipe passes through the notch of the retaining rib.

It enters the groove and is formed by the retaining rib.

The engaging protrusion passes through the inclined surface and enters a position symmetrical to the notch.

At this time, the two pipes can be prevented from coming off by the engagement protrusions coming into contact with the retaining ribs.

Fixed. Because they are fitted in this way, even if each fitting part is fitted quite snugly to prevent air leakage, the slope provided on the retaining ring (screw gap) will cause weak rotation. A strong pushing force can be obtained using power, and a strong fitted state can be obtained. In addition, the engaging protrusion of the electric wire cover engages with the engaging receiving part of the extension pipe.

You can easily attach the @ line cover to the extension pipe using finger pressure to prevent the built-in electric wires from being exposed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
FIG. 5 is a block diagram of the entire vacuum cleaner according to an embodiment of the present invention, where 1 is an electric suction mouth, 2 is an extension tube with built-in electric wires, 3 is a hose with built-in electric wires, and 4 is the main body of the vacuum cleaner. Insert the power plug 5 at the end of the ffi@cord 9 into the ffi source outlet, and
1 Insert the plug 8 at the end of the cord 7 coming out of the hose 3 with built-in electric wire into the electric suction outlet 6 of the remover body, and turn on the switch 53 on the hose with built-in electric wire. Power is supplied to the motor lO. FIG. 1 is a longitudinal sectional view of the extension tube with a built-in electric wire, FIG. 2 is a plan view with the electric wire cover 11 removed, and FIG. 3 is a sectional view taken along line AA in FIG. Moreover, FIG. 4 is an exploded view of each of its parts. Reference numeral 11 denotes a wire cover, in which the engagement protrusion 11a is connected to the engagement receiving portion 1 of the extension pipe 12.
2a, so that the wire cover 11 can be fitted into the extension pipe 12 with finger pressure. Reference numeral 13 denotes a contact piece (hereinafter simply referred to as a contact piece) which is a concave contact, and is connected by an electric wire 14 to a contact pin 15 (hereinafter simply referred to as a contact pin) which is a convex contact. A similar structure is adopted for the remaining two extension tubes with built-in electric wires, and by aligning the contact pin part of one extension tube with built-in electric wires and the contact pin part of the other extension tube with built-in electric wires,
Can be electrically connected. 16 is a retaining ring;
17 is a retaining ring, and the retaining ring 17 has a retaining rib 17a and a notch 17b thereof.

18 is a contact pin fixing member. With the retaining ring 16 and retaining ring 17 in the state shown in Fig. 5, insert the extension pipe 12.
1 as shown in FIG. 1, rotate the integrated retaining rings 16 and 17 (hereinafter simply referred to as retaining rings), and align the notch 17b of the retaining ring 17 with the groove 12b of the extension pipe 12. Stop the retaining ring at this position. Then, align the contact pin side of the other extension tube 2 with built-in electric wires with the contact piece part of this extension tube 2 with built-in electric wires, and insert it. It enters the groove 12b of the extension pipe 12 of the tube 2. 1 hour without
The notch 12C of the retaining ring 17 is removed by rotation of the retaining ring.
The engaging protrusion 12G enters from there, passes through the inclined part 17G, and enters the sixth
The engagement protrusion 12C is fixed at the position indicated by the arrow in the figure. The state in which the extension tubes with built-in electric wires are connected to each other at this time is shown in FIGS. 7 to 9 in order. Even if the two extension tubes are simply pulled together in the state shown in FIG. Since the extension tubes come into contact with the retaining rib L7a, the extension tubes will not come off each other.

In addition, as shown in Figure 1, one electric wire built-in extension 'ff2
The outer diameter of the insertion side (contact pin side) is D 1 > D 2
The inner diameter of the side into which the other extension tube 2 with a built-in electric wire is inserted (one side in contact) is tapered as D s > D t, and the two extension tubes 2 with built-in electric wires have a tapered shape as well. When plugging in and connecting, make sure to keep the connected part airtight to avoid deteriorating the suction performance of the vacuum cleaner.
Dt+ Dl+ Dse D4 dimensions are 0140111
In this respect, the structure is similar to the conventional product, and conventional products require a large amount of force to connect due to the above-mentioned dimensions, making it difficult for the user to operate.However, In this embodiment, as the retaining ring rotates, the engagement protrusion 12C passes through the smooth sloped part 17G and is screwed in and fixed, so the force required for fixing is reduced compared to the conventional extension tube plug-in connection method. This can be done with less force compared to the previous one, and there is no need for troublesome operations when connecting.

Therefore, compared to the conventional simple plug-in connection between extension pipes or the suction port/hose, the screw-in type does not require much force and is useful with a simple configuration.
The connection can be kept airtight by air leaking from the connection.

It has the advantage of not causing insufficient suction power.

When the retaining ring is rotated in the state shown in FIG. 8, the retaining rib 17a of the retaining ring 17 prevents the engaging protrusion 12C from moving in the withdrawing direction, so that the extension tubes 2 with built-in electric wires are prevented from coming off. is fixed. When removing the extension tubes with built-in electric wires from each other, it is sufficient to turn the fixing ring to align the notch 17b with the engagement protrusion 12b, and then pull out one of the extension tubes with built-in electric wires 2 from the other.

FIG. 10 is a cross-sectional view of the electric suction port, and FIG. 11 is an exploded view of each component. Reference numeral 19 indicates an upper case, 2o indicates a rotating brush cover, and 21 indicates a cover attachment/detachment knob.When removing dust entangled with the rotating brush 22, the rotating brush cover 20 can be removed by pushing the cover attachment/detachment knob 21 outward. Therefore, dust entangled with the rotating brush 22 can be easily removed. 23 is a bumper made of soft synthetic AM that serves both to maintain airtightness and to prevent damage to others; 24 is a bending joint that is connected to one side of the extension tube 2 with built-in electric wire in contact; and a stopper 25 connects and fixes the communication tube 26. Ru. Further, as shown in FIG. 10, the contact pin (convex contact) 28 connected to the connection cord 27 is positioned on the contact pin receiving portion 24a of the bent joint 24 by the contact pin cover 29, and is fixed with the screw 31 by the contact pin cover 30. Ru.

Reference numeral 10 denotes a motor for driving the rotating brush 22, and a pulley 34 for transmitting power to a belt 33 is provided at the tip of its shaft. 35 and 36 are vibration isolating rubbers of the motor 32. 37 and 38 are rotating brush bearings. 4o is a heat-sensitive element connected in series with the motor 10 that detects a large current and stops energizing the motor 10 in order to prevent the motor 10 from being burnt out or destroyed by the large current that flows when the motor 10 is locked due to clogged with dirt or the like. It is connected. 41 is the lower case,
42 is a breathable filter that blocks dust when cooling air enters the motor 1° from hole 32 in the lower case, and 43 maintains a constant airtightness between the lower case and the floor, improving dust suction performance. This is a suction keeper made of soft synthetic resin. 44 is the rear wheel, 45 is its rotating shaft, 4
6 is the front axle, 47 is its rotating shaft, and 48 is a screw for fixing the lower case. The structure of the contact pin part of the electric suction port is similar to the contact pin part of the extension tube with a built-in electric wire 2, and can be connected to the contact piece part of the extension tube with a built-in electric wire.

Figure 12 is a vertical cross-sectional view of the proximal portion 9 of the hose 3 with built-in electric wires.
Figure 3 is an enlarged view of the insertion part of the hose into the vacuum cleaner body.
FIG. 14 is an exploded view of each component.

In these figures, 49.50 is the retaining ring 16.1
7. 51 is a connection joint, 52 is a contact piece (concave contact), 53
54 is a control board for varying the electric power of the electric blower in the main body of the vacuum cleaner; 55 is a board cover that covers this; 56 is a resistance value of a variable resistor in the control board. This is a knob for arbitrarily setting the power of the electric blower and setting it to an appropriate suction force. Reference numeral 57 denotes a switch cover having a plurality of engaging protrusions 57 similar to the wire cover 11 of the extension tube 2 with built-in wires.
a can be easily fitted into the engagement receiving portion 51a of the connection joint 51 by finger pressure and fixed. The structure of the contact piece of the internal hose 3 with a built-in electric wire is the same as that of the extension tube with a built-in electric wire. Therefore, the retaining ring 49. The extension tube 2 with built-in electric wire or the contact pin side of the electric suction port 1 can be inserted and fixed by the retaining ring 5o.

58 is an insertion tube to the vacuum cleaner main body side, 59 is a core wire 60 built in a flexible hose 60 to the control board
When inserted into the vacuum cleaner body with an insertion pin for connecting to the electric blower inside the vacuum cleaner body and the power cord 9 in FIG. 61 is a spring, 62 is a retaining member, 63 is a pin cover, and 64 is a fixing screw. Note that the contact piece 52 and the switch 53 are connected to the cord 7 and the plug 8 by a covered electric wire 60b built in parallel to the core wire 60a of the hose 60.

The operation will be explained using the above configuration. As shown in Fig. 15, electric suction port 1. Extension tube with built-in electric wire (3 pieces) 2. Hose with built-in wire 3
Connect the suction port 4 of the vacuum cleaner body 4 to the hose 3 with built-in electric wire.
a, and plug the plug 8 into the outlet of the vacuum cleaner body 4 (
(not shown) and connect the power cord 5 to the power source. In this state, use the knob 56 to set an appropriate suction force. The suction force becomes stronger as the knob 56 is moved toward the long pipe side, and the suction force becomes weaker as the knob 56 is moved toward the opposite side. An electric blower (not shown) is configured to stop. When cleaning general floors, tatami mats, etc., the switch 53 for energizing the electric suction mouth 1 is turned off, the motor 10 is stopped, and dirt is sucked out from the electric suction mouth. Next, when cleaning the carpet, turn on the switch 53 and the motor 10 will run the rotating brush 2 through the belt 33.
2 rotates and scoops up hard-to-remove dirt entangled in the carpet, making it easier to remove and sucking in the dirt. According to this embodiment, the rotating brush 22 is
It rotates with stronger torque than an air turbine suction spout that rotates using wind power, so it can smoothly clean carpets with long piles without stopping the rotation.

In addition, the extension tube with built-in electric wire The hose with built-in electric wire and the electric suction port are plug-in type compared to conventional ones that connect with an external cord, so connection is easier and the cord does not get in the way.Furthermore, the electric wire cover 11 and switch cover 5
7 is a snap-in type, so it is easy to assemble, has a simple structure, has a small number of parts, and has many advantages, such as low cost.

〔Effect of the invention〕

As described above, according to the present invention, there is provided an electric suction mouth and an extension tube.

To obtain a vacuum cleaner having an extension pipe, a hose, and an electric suction port, which can easily and firmly connect a hose and a vacuum cleaner body, have a simple structure with little air leakage, and have excellent assemblability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view of an extension tube with built-in electric wires, FIG. 2 is a plan view of the extension tube with built-in electric wires with the wire cover removed, and FIG. , A-A,
B-B11A sectional view, Figure 4 is an exploded view of each part of the extension tube with built-in electric wire, Figure 5 is a longitudinal sectional view of the retaining ring, and Figure 6
The figure shows the relationship between the groove of the retaining ring and the engagement protrusion of the extension pipe. Figures 7, 8, and 9 are cross-sectional views showing how the extension pipes with built-in electric wires are connected to each other. Figure 10 is , FIG. 11 is an exploded view of each part of the electric suction port, FIG. 12 is a vertical cross-sectional view of the hand portion of the hose with built-in electric wires, and FIG. 13 is the main body of the hose with built-in electric wires. Partial enlarged view of the insertion part,
Figure 14 is an exploded view of each part of the hose with a built-in electric wire, Figure 15
The figure is a block diagram of the entire vacuum cleaner. 1...Electric suction port, 2...Extension tube with built-in electric wire, 3...
- Hose with built-in electric wire, 10... Motor, 11... Wire cover, 11a... Engagement protrusion, 12... Extension pipe, 12a... Engagement receiver, 12b... Groove, 12c
...Engagement protrusion, 13/52...Concave contact (contact piece)
, 14...Electric wire. 15/28... Convex contact (contact pin), 16/49...
...Retaining ring A, 17.50...Retaining ring B
, 17a... retaining rib, 17b... notch, 17
C... Inclined part, 22... Rotating brush, 33... Belt, 53... Switch, °'"

Claims (1)

[Claims] 1. An extension pipe for a vacuum cleaner having a cylindrical pipe and a retaining ring rotatably disposed at the end of the pipe, wherein each end of the pipe has a tapered part into which each can be fitted. A vacuum cleaner characterized in that it has a joint part having a straight part, and is configured to be fixed or removed after being slid in the axial direction by the retaining ring. 2. The vacuum cleaner has a built-in vacuum cleaner body and a motor, and is driven by the motor and has an electric suction mouth with a rotating brush, an extension tube with a built-in electric wire, and a hose with a built-in electric wire, which has a built-in electric wire for supplying electricity to the motor. , when the electric suction outlet, the extension tube with built-in electric wire, the hose with built-in electric wire, and the vacuum cleaner body are connected, the motor is energized and the rotating brush can rotate; In a vacuum cleaner equipped with two pipes that are connected at the respective joints of the pipe and the hose with a built-in electric wire, one pipe is provided with a concave contact point and a retaining ring, and the other pipe is provided with an engaging protrusion and a convex shape. A contact point is provided, and the retaining ring has a groove portion into which the engaging protrusion is fitted, and this engaging receiving portion screws the engaging protrusion into the depths through the inclined portion by rotation of the retaining ring, i.e. When the connection between both pipes is pulled in a stronger direction and the retaining ring rotates within a certain range, the retaining rib in the groove fixes the engagement protrusion without moving in the withdrawing direction, thereby preventing the two pipes from coming off. A vacuum cleaner characterized by: 3. In claim 1, an extension tube with a built-in electric wire is provided with an extension pipe, a convex contact at one end and a concave contact at the other end, and these two contacts are connected with an electric wire so that the electric wire is not exposed. The electric wire cover is engaged with the extension pipe by finger pressure and fixed by an engagement receiving portion of the extension pipe and an engagement protrusion provided on the electric wire cover that engages with the engagement receiving portion of the extension pipe. A vacuum cleaner characterized by: