JPH01166730A - Floor nozzle for electric cleaner - Google Patents

Abstract

PURPOSE: To miniaturize, to prevent mal-conduction and to increase durability of the nozzle by plating bristles on circumference face of a turning bracket, fixing permanent magnet that are opposing armature coil on bore face of the bracket and by placing plural Hall elements on the armature coil. CONSTITUTION: An armature coil 21 is composed of four coils L1 to L4 , and installed with Hall elements H1 , H2 . A turning bracket 23 is supported turning free by a fixed shaft 20 with a ball bearing 24, and is spirally planted with many bristles 25 on the circumference face of the same. A permanent magnet 26, which is placed with N-pole and S-pole alternately opposing the armature coil 21, is installed on the bore face of the bracket. Power current is supplied to the armature coil 21 via a lead wire 22, and turning power occurred in between the armature coil 21 and the permanent magnet 26 functionates driving the turning bracket 23 and thus making the bristles 25 to pound a face of a carpet and the dust is sucked into a cleaner main body through a sucking chamber 19, a sucking opening 18 and a pipe connector 17. It is possible to unify a motor and a turning brush, to down size a nozzle main body for floor and to increase durability because there are no wear and tear parts and there is no possibility of mal-conduction due to dust attachment.

Description

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

(Prior art) As a prior art of this type of floor nozzle, for example,
The floor nozzle of this prior art is known as disclosed in Japanese Patent No. 6-43922, and its configuration will be explained below with reference to FIG. 6. (1) and a lower nozzle member (1).
A suction port (not shown) is opened on the bottom surface, and a joint (2) for connecting to the vacuum cleaner body is provided at the rear, while an outer rotor type motor is built in this lower nozzle member (1). The motor (3) is configured as follows.

That is, this motor (3) has an armature (5) fixed to a shaft (4) fixed to the floor nozzle body, and a lead wire (5') from one end of the armature (5).
At the same time, a cylindrical body (7) is rotatably supported on the shaft (4) via a ball bearing (6), and brush bristles (8) are implanted on the outer peripheral surface of the cylindrical body (7). A flocked body (9) is constituted by the flocked body (9), and a rotor (10) is further fixed to the inner circumferential surface of the cylindrical body (Oi7).

(Problem to be Solved by the Invention) However, according to the configuration of the prior art described in ``U,'' the specific structure for supplying power from an external power source to the motor (3) that drives the flocked body (9) is clear. is not disclosed in
There was a problem that it could not be implemented.

An object of the present invention is to provide a floor nozzle for a vacuum cleaner having a specific configuration of a power supply section to the motor of the floor nozzle.

(Means for solving the gap between mold points) The technical means of the present invention for achieving the above object is to provide a hollow space between both ends in the floor nozzle body having a pipe joint for connection to the vacuum cleaner side. A fixed shaft is constructed, an armature winding is provided on the outer circumferential surface -F of this fixed shaft, and a lead wire for energizing the armature winding and an external power source is inserted into the hollow interior. A rotating bracket for the motor is coaxially arranged, brush bristles are planted on the outer circumferential surface of the rotating bracket, and a permanent magnet facing the armature winding is fixed on the inner circumferential surface of the rotating bracket. This is characterized in that a plurality of Hall elements are provided in the child winding.

(Function) According to the above configuration, power is supplied from the external power source through the lead wire, the power supply current reaches the armature winding through the lead wire, and an electromotive force is generated in the Hall element in the magnetic field of the permanent magnet. The Hall effect occurs, and at this time, the rotating bracket, on which the brush bristles are implanted, rotates with respect to the armature winding on the fixed side. By configuring the rotating brush with a motor that rotates the bracket in this way, the floor nozzle body can be made smaller, and it can also be used with so-called brushless motors, which do not have mechanical contacts such as brushes for power supply. Therefore, it is possible to prevent poor conduction due to adhesion of dust, etc., and since there are no consumable parts such as carbon brushes, it is possible to extend the service life.

In addition, since it is composed of a DC motor that uses a Hall element, it has a large starting torque and can rotate at high speeds.

(Example) Hereinafter, an example of the floor nozzle for a vacuum cleaner according to the F1 invention will be described in detail based on the drawings. In Figures 1 to 5, (II) is the floor nozzle body, and the upper nozzle member (12)
and a lower nozzle member (13) are coupled via a bumper (14), and a fitting hole (16) into which a connecting cylinder member (15) is rotatably fitted is provided in the rear center portion; A pipe joint (H7) for connection to the vacuum cleaner main body is connected via the cylindrical member (H5).

The lower nozzle member (13) includes the cylinder member (H5).
A suction port (18) that opens on the tip side of the
A wide suction chamber (H9) is formed which communicates with the main body, and an outer rotor type commutator motor (A) configured as follows is installed in the suction chamber (19).

That is, a hollow fixed shirt (20) is installed between both ends of the suction chamber (H9), and an armature winding (21) is attached to the outer peripheral surface of the fixed shirt (H20). There is. As shown in Figures 2 and 3, the armature winding (2I) has four coils (Ll) (H2) (L:l
) (H4), and Hall elements (H+) (H2) made of a semiconductor such as In5b1GaAs are provided at two locations, and are connected to a lead wire (22) inserted into the hollow interior of the fixed shaft (20), It is connected to an external power source via these lead wires (22).

(23) is a rotating bracket disposed coaxially with the fixed shirt (20), and is rotatably supported by the fixed shaft (20) via a ball bearing (24);
A large number of brush bristles (25) are arranged in a spiral pattern on the outer peripheral surface. Further, as shown in FIGS. 2 and 3, permanent magnets (26
) are provided.

(AMPI) (AMP2) are amplifiers that amplify the outputs of the Hall elements (H4) and (H2), respectively.

Next, the operation of the above configuration will be explained. Power is supplied from the external power source through the lead wire (22), and power supply current is supplied to the armature winding (2I) via the lead wire (22). A rotating force generated between the armature winding (21) and the permanent magnet (26) acts on the energized armature winding (21), which drives the rotating bracket (23) to rotate, and this rotation causes the brush bristles (25) to rotate. ... hits the carpet surface, and the dust that is knocked out flows from the suction chamber (19) to the suction port (+8),
It is sucked into the vacuum cleaner body through the pipe joint (17).

By the way, the Hall element (Hl) ([2) generates an electromotive force E when a control current I flows in a magnetic field B, and the electromotive force E is obtained by the following equation.

However, k: Hall constant, t: Thickness of the Hall element. Therefore, the electromotive force E on the Hall element ([1) (H2)
The time when the magnetic field of the permanent magnet (2B) is detected is the time when the magnetic field of the permanent magnet (26) is detected.
It is possible to detect the position of

To explain this point more specifically using FIG. 3, if one Hall element (Hl) is in a state facing the N pole of the permanent magnet (26), the magnetic field will generate an electromotive force, which will be amplified. i (AMPI), the coil (L
l) Current flows through (L3), coil (Ll) is N pole,
When the coil (L3) is set to the S pole, the permanent magnet (
26) moves in the direction of the arrow in Figure 3 due to attraction and repulsion. At this time, the other Hall element (H2) is located between the S pole and the N pole and does not generate an electromotive force, so the coil (L2)
No current flows through (L4), so there is no polarity and no attraction or repulsion is generated.

Next, when the permanent magnet (26) rotates by 30 degrees, the other Hall element (H2) faces the N pole of the permanent magnet (24), detects the magnetic field, generates an electromotive force, and the amplifier ( AMP2) by coil (L2) (L4)
Current flows through the coil (L2), the N pole, and the coil (L4).
becomes the S pole and exerts attractive force and repulsive force, which causes the permanent magnet (26) to move in the direction of the arrow, and by repeating this, the permanent magnet (2B) always moves in the direction of the arrow. .

In other words, in FIG. 2, the rotating bracket (23) rotates in the direction of the arrow (clockwise rotation). in this way,
As the rotating bracket (23) of the motor (23) rotates, it can be integrated with the rotating brush, making it possible to downsize the floor nozzle body, and since there are no consumable parts like carbon brushes in commutator motors, the service life can be extended. Plan,
Furthermore, since no power is supplied through mechanical contact, there is no possibility of conduction buoyancy caused by adhesion of dust or the like.

In addition, in the embodiments of the present invention, a brushless motor using a Hall element is shown, but a photoelectric type, or a brushless motor using a Hall element is shown.
Similar effects can be obtained with brushless motors such as induction motors and synchronous motors.

(Effects of the Invention) As explained above, the floor nozzle of the vacuum cleaner of the present invention has
By planting brush bristles on the outer circumferential surface of the motor's rotating bracket, it is possible to integrate the motor and a conventional rotating brush, making it more compact, and eliminating the need for mechanical contacts such as brushes for power supply. Since it can be a so-called brushless motor, it is possible to prevent poor conduction due to adhesion of dust, etc., and since there are no consumable parts such as carbon brushes, it is possible to extend the life of the motor.

In addition, since it is composed of a DC motor using a Hall element, it has become possible to create a rotating brush that has a large starting torque and can rotate at high speed.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, and the first
The figure is a partial cross-sectional view of the motor of the floor nozzle, Figure 2 is a longitudinal cross-sectional view of the motor, Figure 3 is a wiring diagram explaining the operation of the motor, Figure 4 is a cross-sectional plan view of the floor nozzle, and Figure 5 is a cross-sectional view of the motor of the floor nozzle. The figure is a perspective view of a floor nozzle, and FIG. 6 is a cross-sectional plan view of a conventional floor nozzle. (11)... Floor nozzle body, (17)... Connection pipe joint, (20)... Fixed shaft, (21)... Armature winding, (22)... Lead wire, (23)...Rotating bracket, (25)...Brush bristles, (2G)...
・Permanent magnet, (Hl) ()12)...Hall element. 8gmng & bow 4th figure 5th figure 6th figure

Claims (1)

[Claims] A hollow fixed shaft is constructed between both ends within the floor nozzle body having a pipe joint for connection to the vacuum cleaner side, and an armature winding is provided on the outer peripheral surface of this fixed shaft,
A lead wire for energizing the armature winding and an external power source is inserted into the hollow interior, while a rotating bracket for the motor is arranged coaxially with the fixed shaft, and brush bristles are planted on the outer peripheral surface of the rotating bracket. A floor nozzle for a vacuum cleaner, characterized in that a permanent magnet facing the armature winding is fixed to the inner peripheral surface, and a plurality of Hall elements are provided on the armature winding.