JPH0643Y2 - Vacuum cleaner floor nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a floor nozzle having a built-in motor for a domestic vacuum cleaner.

(Prior Art) As a prior art of this type of floor nozzle, for example, Japanese Patent Laid-Open No.
The one disclosed in Japanese Patent Publication No. 6-43922 is known, and its configuration will be described below with reference to FIG. 4. The floor nozzle of this prior art is an upper nozzle member (not shown) and a lower nozzle member. (1) is provided, while a suction port (not shown) is opened on the lower surface of the lower nozzle member (1), and a joint (2) to the cleaner body is provided at the rear part of the lower nozzle member (1).
(1) has a built-in outer rotor type motor,
This motor (3) is constructed as follows.

That is, this motor (3) fixes both ends of the armature (5) to the shaft (4) fixed to the floor nozzle main body, and also connects the lead wire (5 ') from one end of the armature (5). While pulling out, while supporting the cylindrical body (7) rotatably via the ball bearing (6) of the shaft (4), brush bristles (8) are planted on the outer peripheral surface of the cylindrical body (7). A flocked body (9) is formed, and a rotor (10) is fixed to the inner peripheral surface of the cylindrical body (7).

(Problems to be Solved by the Invention) However, according to the configuration of the above prior art, the flocked body
When a commutator motor that has a large starting torque and can easily rotate at high speed is used as the motor (3) that drives (9), a concrete example for supplying power from an external power source to this motor (3) Structure is not clearly disclosed,
There was a problem that it could not be implemented.

An object of the present invention is to provide a floor nozzle of an electric vacuum cleaner having a specific configuration of a power supply unit for the motor when using an optimal commutator motor for the floor nozzle.

(Means for Solving the Problems) The technical means of the present invention for achieving the above-mentioned object is a hollow nozzle which is hollow between both ends in a floor nozzle body having a pipe joint for connecting to the vacuum cleaner. A fixed shaft is installed, a contact stand having a pair of contact springs is provided on the outer peripheral surface of the fixed shaft, and lead wires for energizing the contact springs and an external power source are inserted into the hollow interior while the fixed shaft is fixed. A rotating bracket of the motor is arranged coaxially with the shaft, brush bristles are planted on the outer peripheral surface of the rotating bracket, and a pair of cylindrical rails slidably contacting the contact springs are provided on the inner peripheral surface. The rails are electrically connected to the motor side.

(Operation) According to the above configuration, power is supplied from the external power source through the lead wires, the power source current passes through the lead wires to reach the contact springs, and the contact springs contact the cylindrical rails to connect these rails. Energize the motor side via
The motor is driven, which causes the rotary bracket on which the brush bristles are implanted to rotate. At the time of this rotational drive, the rail rotates together with the rotating bracket, but the contact spring always comes into sliding contact with the rotating rail at a constant spring pressure, so that the motor can be smoothly energized smoothly. Therefore, the commutator motor having a large starting torque, a high-speed rotation, and a simple structure can be configured.

Further, since the mechanical contact portion composed of the contact spring and the rail is disposed in the rotating bracket, it is possible to reliably prevent conduction failure due to adhesion of dust or the like, and realize a motor that is hard to fail and has a long life. .

(Embodiment) An embodiment of a floor nozzle of an electric vacuum cleaner according to the present invention will be described in detail below with reference to the drawings. In FIGS. 1 to 3, (11) is a floor nozzle body, which is formed by connecting an upper nozzle member (12) and a lower nozzle member (13) through a bumper (14) and connecting them to a rear central portion. A fitting hole (16) into which the cylinder member (15) is rotatably fitted is provided, and a pipe joint (17) for connection to the vacuum cleaner body side is connected through the cylinder member (15). ing. In the lower nozzle member (13), a suction port (18) opening to the tip side of the tubular member (15) and a wide suction chamber (19) communicating with the suction port (18) are formed. An outer rotor type commutator motor (A) having the following configuration is incorporated in the suction chamber (19).

That is, a hollow fixed shaft (20) is laid across both ends in the suction chamber (19), and an armature winding (21) and a commutator ( 22) and a contact base (24) having a pair of contact springs (23). Each contact spring (23)
5) are connected and these leads (25) are fixed shaft (2
It is inserted into the hollow inside of 0) and connected to an external power source.

Reference numeral (26) is a rotary bracket arranged coaxially with the fixed shaft (20), which is rotatably supported by the fixed shaft (20) via a ball bearing (27) and has a large number of brush bristles on its outer peripheral surface. (26a) ... are planted in a spiral arrangement. A permanent magnet (28) is arranged on the inner peripheral surface so as to face the armature winding (21), and a carbon brush (29) is held so as to face the commutator (22). A pair of brush holders (30) are provided. Each brush holder (30) is a holder part where the carbon brush (29) is inserted and supported.
Attach the carbon brush (29) to the back end of the (31) to the commutator (2
A coil spring (32) for pressing and urging is inserted into 2).

Further, a rail base (33) is fixed to the inner peripheral surface of the rotating bracket (26), and a pair of cylindrical members slidingly contacting the contact springs (23) on the inner peripheral surface side of the rail base (33). A rail (34) is provided, and a conductive wire is connected between the rail base (33) and the brush holder (30) by a lead wire (35), whereby each rail (34) and the carbon brush (29) are connected. Is electrically connected to each other via the rail base (33), the lead wire (35) and the brush holder (30).

Next, the operation of the above configuration will be described. Power is supplied from an external power source through the lead wire (25), and the power source current passes through the lead wire (25) and reaches each contact spring (23). The contact between the rails (23) and each rail (34) causes these rails (3
4) to rail stand (33), lead wire (35) and brush retainer
The carbon brush (29) is energized via the (30) and further supplied to the armature winding (21) via the commutator (22).
A rotating force generated between the armature winding (21) in the energized state and the permanent magnet (28) is applied, which causes the rotating bracket (26).
Is driven to rotate, and by this rotation, the brush bristles (26a) ... strike the carpet surface, for example, and the dust that has been blown out passes through the suction chamber (19), the suction port (18), and the pipe joint (17) inside the cleaner body. Is sucked into.

During this rotational drive, the rails (34) rotate together with the rotation bracket (26), but the contact springs (23) are constantly in sliding contact with the rotating rails (34) at a constant spring pressure. The carbon brush (29) can be energized smoothly and smoothly.

In this embodiment, since the mechanical contact portion constituted by the contact spring (23) and the rail (34) is arranged in the rotating bracket (26) as described above, dust adheres and the conduction failure occurs. Also, because the rotation bracket (26) of the motor (A) also doubles as the conventional rotation brush,
Since this rotating brush is integrated with the motor (A), the rotating brush can be downsized, and a rotation transmitting member such as a belt for transmitting the driving force of the motor to the rotating brush is unnecessary.

(Effects of the Invention) As described above, the floor nozzle of the electric vacuum cleaner of the present invention has a compact structure in which the motor and the conventional rotating brush are integrated by implanting brush bristles on the outer peripheral surface of the rotating bracket of the motor. When the motor is driven to rotate, the contact spring always makes sliding contact with the rotating rail with a constant spring pressure so that the motor can be energized smoothly and smoothly. A commutator motor with a large structure that can easily achieve high-speed rotation and a simple structure can be incorporated. Further, since the mechanical contact portion composed of the contact spring and the rail is disposed in the rotating bracket, it is possible to reliably prevent conduction failure due to adhesion of dust and the like, and to realize a motor that is hard to fail and has a long life. , And has a practically excellent effect.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention.
FIG. 4 is a cross-sectional view of the main part of the motor part, FIG. 2 is a cross-sectional plan view of the floor nozzle body, and FIG.
The figure is a cross-sectional plan view of the prior art. (11) ... Floor nozzle body, (17) ... Connection fitting, (20) ... Fixed shaft, (23) ... Contact spring, (24) ... Contact base, (25) ... Lead wire, (26) ... Rotation Bracket, (26a) ... Brush bristle, (34)
… Cylindrical rail, (A)… Motor.

Claims (1)

[Scope of utility model registration request] 1. A hollow fixed shaft is laid across both ends in a floor nozzle main body having a pipe joint for connection to the vacuum cleaner side, and a pair of contact springs is provided on the outer peripheral surface of the fixed shaft. While providing a contact block having the same, a lead wire for energizing each of the contact springs and an external power source is inserted into the hollow inside, and a rotary bracket of the motor is arranged coaxially with the fixed shaft, and an outer peripheral surface of the rotary bracket is provided. Brush hair is planted in the inner peripheral surface of the electric vacuum cleaner, and a pair of cylindrical rails slidably contacting the contact springs are provided on the inner peripheral surface of the rails, and these rails are conductively connected to the motor side. Floor nozzle.