HK1039553B

HK1039553B - Nozzle for floor vacuum cleaners

Info

Publication number: HK1039553B
Application number: HK02101317.2A
Authority: HK
Inventors: 迪特‧卡芬伯格; 托马斯‧林德; 托馬斯‧林德
Original assignee: 维斯尔-韦克有限公司; 維斯爾-韋克有限公司
Priority date: 2000-04-08
Filing date: 2002-02-22
Publication date: 2004-12-24
Also published as: CN1149954C; DE10017705A1; CN1317287A; DE10017705C2; HK1039553A1

Abstract

The nozzle has a suction head, a pipe connection for the suction pipe and a joint between the pipe connector and the suction head containing the suction channel. The knuckle joint has two connected channel sections pivotable about a joint axis. One section is a suction head connecting element; the other is inserted into the suction head connecting element so the effective lines of the joint axis and the orthogonal axis intersect. The nozzle has a suction head (1) with a channel opening into a floor suction opening, a pipe connection (3) for the suction pipe and a joint (5) between the pipe connector and the suction head (1) containing the suction channel (6). The knuckle joint has two connected channel sections (8,9) pivotable about a joint axis. One channel section is a suction head connecting element (8) and is inserted into the suction head to pivot about a horizontal axis (10) orthogonal to the joint axis (7). The other (9) is inserted into the suction head connecting element so the effective lines of the joint axis and the orthogonal axis intersect.

Description

Suction nozzle of floor vacuum cleaner

Technical Field

The invention relates to a dust suction nozzle of a floor vacuum cleaner, which is provided with a suction head, wherein the suction head comprises a suction hole close to the floor and a pipeline leading into the suction hole; the plug is used for connecting the air suction pipe; and a joint between the plug and the suction head, the joint comprising a suction conduit.

Background

Suction nozzles of the above-described construction have been widely used in practice and include a flip-up joint between the spigot and the suction head. The plug is of an inclined structure and is connected with the turnover joint so as to be capable of moving in a rotating mode. The aiming of the suction head in the suction direction can be adjusted by the rotation of the suction tube. The maximum deflection angle is determined by the curvature of the angled tube, and is in practice approximately 30 to 35 °. The working width of the cleaning nozzle is only insignificantly reduced by the deflection possibilities, so that floor cleaning nozzles are often not used for sucking air into narrow recesses.

In another known floor nozzle for a vacuum cleaner, which is known from practice and is used in industry, a joint having a vertical axis of rotation and a horizontal axis of pivoting is provided at the top of the suction head, into which a flexible hose is inserted (see nilfisk advanced company crochure). Due to the rotatable and pivotable mounting of the suction pipe, the suction head constructed with a rectangular bearing surface can be aimed both transversely and longitudinally with respect to the suction direction, so that the floor nozzle can be used both for suction of large floor areas and for suction of narrow recesses. However, the joints have a high construction which limits the use of floor nozzles under items of furniture. The aiming of the suction nozzle can only be adjusted with difficulty, if at all, by a rotary movement of the suction nozzle connected to the plug. If the suction pipe rotates, the suction head tends to tilt.

Disclosure of Invention

The object of the present invention is to provide a suction nozzle of a floor vacuum cleaner, in which the suction head can be rotated by 90 ° by rotation of the suction pipe connected to the plug, so that it can clean both a large area and a narrow groove. The structure is such that the yawing motion does not exert any disturbing tilting moment on the suction head.

To this end, the present invention provides a suction nozzle of a floor vacuum cleaner, the suction nozzle having: the suction head comprises a suction hole close to the ground and a pipeline leading into the suction hole; the plug is used for connecting the air suction pipe; and a joint between the plug and the suction head, said joint comprising a suction duct, characterized in that the joint is configured as a universal joint and comprises two duct portions connected so as to be pivotable about a joint axis, the suction head connecting part being in the form of a duct portion which is inserted in the suction head so as to be able to be turned about a horizontal axis at right angles to the joint axis, and wherein a second duct portion of the universal joint is inserted in the suction head duct portion in such a way that the line of action of the joint axis and the horizontal axis intersects at right angles thereto.

When having the structure proposed by the present invention, the aiming of the suction head can be deflected by the rotation of the suction pipe connected to the plug. As the suction pipe rotates through 90 °, the suction head supported on the floor also starts to rotate, likewise through 90 °. Since the two axes of rotation of the universal joint intersect, the swiveling movement does not exert any tilting moment on the suction head, so that the aiming of the suction head can be easily adjusted by the rotational movement of the suction pipe without impairing the suction operation.

The suction head preferably has a substantially rectangular substrate surface with a length several times the width. The suction head can be of a narrow construction and have a long length, so that the suction head can be used effectively for cleaning large areas, and also for cleaning narrow grooves after rotation of the suction head. The length/width ratio of the substrate surface should exceed 3. The suction head connection part of the universal joint is advantageously inserted into an opening in the top of the suction head. The result is a flat suction nozzle which can also be used under beds and furniture with low spacing.

According to a preferred embodiment of the universal joint, the suction head attachment member comprises trunnions, an arcuate attachment surface which engages in the suction head, and a receiving cavity for receiving the tube portions which are inserted for pivotal movement. The tube adjoining the suction head of the universal joint bears sealingly against the connecting surface of the suction head connecting part. The passage opening of the receiving chamber sealingly abuts against the curved surface of the pipe section inserted to be pivotable. The relatively movable parts of the universal joint inserted in the suction head may have integrally molded sealing flanges serving as sealing gaps between the movable parts. According to the invention, the universal joint is formed by two pipe sections which simultaneously form the air guide and which can be effectively sealed off from each other and from the suction head by means of integrally moulded sealing flanges.

Drawings

The invention will be explained below with reference to the accompanying drawings for the simple illustration of embodiments, in which:

figures 1 and 2 are schematic views of a cleaning nozzle of a floor vacuum cleaner according to the present invention in different operating positions.

Figure 3 is a schematic exploded view of the suction nozzle shown in figures 1 and 2.

Detailed Description

In its basic construction, the suction nozzle of the floor vacuum cleaner shown in the drawings comprises a suction head 1, which suction head 1 has a suction opening adjacent to the floor and a duct 2 leading into the suction opening; a plug 3, wherein the plug 3 is used for connecting an air suction pipe 4; and a joint 5, the joint 5 being located between the plug 3 and the suction head 1, said joint comprising a suction duct 6. The joint 5 is configured as a universal joint, also known as a universal joint or a universal coupling, and comprises two pipe portions 8, 9 connected to pivot about an axis 7. The suction head attachment part is in the form of a tube portion 8 which is inserted in the suction head 1 so as to be capable of being turned around a horizontal axis 10 at right angles to the joint axis 7. The second pipe section 9 of the universal joint 5 is inserted into the suction head connection part 8 in such a way that the line of action of the joint axis 7 and the axis 10 intersects at right angles there. The suction head 1 has a substantially rectangular base plate surface, which contains an opening at its top, into which the suction head connection part 8 of the universal joint 5 is inserted. The suction head has an elongated structure with a length/width ratio greater than 3.

The aiming of the suction nozzle 1 can be adjusted by a rotational movement of the suction pipe 4, the suction pipe 4 being connected non-rotatably to the linear plug 3. The aim of the suction nozzle 1 between the operating position shown in fig. 1 and the operating position shown in fig. 2 can also be changed by 90 ° by a rotational movement of the suction nozzle 4 through 90 °. As is immediately clear from a comparison of fig. 1 and 2, the suction head 1 can be used both for suction of large surfaces and for suction of narrow grooves.

The actual structure of the universal joint 5 is clearly visible in fig. 3. The suction head connecting part 8 of the universal joint 5 comprises 4 surfaces 11 arranged at right angles to each other with respect to the trunnion 12, an arcuate connecting surface 13 engaging in the suction head 1, and a cavity 14 for receiving the pipe section 9, which pipe section 9 is inserted so as to be pivotable. The tube 2 of the suction head 1 adjoining the universal joint 5 bears sealingly against the connecting surface 13 of the suction head connecting part 8. The passage opening 15 of the receiving chamber 14 also sealingly abuts against an arcuate surface 16 of the pipe section which is inserted into the pivotable pipe section. The relatively movable parts of the universal joint 5 inserted in the suction head 1 may also have integrally moulded sealing flanges serving as sealing gaps between the movable parts. The pivoting angles of the two pipe sections 8, 9 forming the universal joint 5 are each limited to approximately 60 °. Larger pivoting angles, for example up to 90 °, are not excluded.

Claims

1. A suction nozzle of a floor vacuum cleaner, the suction nozzle having:

the suction head (1), the suction head (1) includes the suction hole next to the ground and leads into the pipeline (2) of the suction hole;

a plug (3), wherein the plug (3) is used for connecting an air suction pipe (4); and

a joint (5), the joint (5) being located between the plug (3) and the suction head (1), the joint comprising a suction duct (6),

characterized in that the joint (5) is configured as a universal joint and comprises two pipe sections (8, 9) which are connected so as to be pivotable about a joint axis (7), the suction head connection part being in the form of a pipe section (8), which pipe section (8) is inserted in the suction head (1) so as to be tiltable about a horizontal axis (10) at right angles to the joint axis (7), and wherein the second pipe section (9) of the universal joint (5) is inserted in the suction head pipe section (8) in such a way that the line of action of the joint axis (7) and the horizontal axis (10) intersect at right angles there.

2. A suction nozzle according to claim 1, characterized in that the suction head conduit portion (8) comprises trunnions (12), an arcuate connecting surface (13) which engages in the suction head (1), and a receiving chamber (14) for receiving the second conduit portion (9), into which the second conduit portion (9) is inserted for pivotal movement, the conduit (2) of the suction head (1) adjacent the universal joint (5) sealingly bearing against the arcuate connecting surface (13) of the suction head conduit portion (8), and wherein the passage opening (15) of the receiving chamber (14) sealingly abuts the arcuate surface (16) of the pivotable second conduit portion (9).

3. A nozzle according to claim 2, characterised in that the relatively movable parts of the universal joint (5) inserted in the suction head (1) have integrally moulded sealing flanges for sealing gaps between the movable parts.

4. A nozzle according to any one of claims 1 to 3, characterised in that the pivoting angles of the two duct portions (8, 9) forming the universal joint (5) are each limited to 90 °.

5. A nozzle according to any one of claims 1 to 3, characterised in that the suction head duct portion (8) is inserted in an opening in the top of the suction head (1).

6. A nozzle according to any one of claims 1 to 3, characterised in that the suction head (1) has a substantially rectangular base surface, the length of which is several times the width.