JPS649852B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vacuum cleaner having a rotating brush built into a floor nozzle.

Configuration of conventional example and its problems Figure 3 shows the rotating brush drive control section of this type of vacuum cleaner. The Hall element 3 detects the change in the magnetic field that occurs. However, the relative position between the Hall element 3 and the magnet 2 has a tolerance range of 1~
While extremely strict dimensions of 1.5mm are required,
Conventionally, the Hall element 3 and the pulley 1 were each independently fixed to the floor nozzle, so it was very difficult to keep their relative positions within tolerance.
Therefore, there is a problem of equipment malfunction due to this.
It was difficult to use it in mass-produced products.

OBJECTS OF THE INVENTION The present invention eliminates these conventional drawbacks and ensures reliability of the device.

Structure of the Invention The present invention provides a first pulley with a belt stretched between it and a rotating brush, a belt stretched between the electric motor, and a second pulley that rotates integrally with the first pulley that is supported around a shaft. At the same time, a holder with a Hall element attached is attached to this shaft,
By disposing a magnet on the first pulley in correspondence with this Hall element, and further connecting the Hall element to the control circuit of the electric motor, the relative position between the magnet and the Hall element can be made with little error, and the device can operate. This is to ensure that

DESCRIPTION OF EMBODIMENTS The embodiments will be described below with reference to the accompanying drawings.
FIGS. 1 and 2 show an embodiment of an upright type vacuum cleaner. Reference numeral 11 denotes a vacuum cleaner body having an input changeover switch at the top, a dust collection unit in the center, and an electric motor at the bottom; 12 a switch knob for operating the input changeover switch; 13 a lid for the dust collection unit; 14
is a buckle for attaching and detaching the lid 13. 15 is a handle for operation, 16 is a grip for making it easier to grasp the handle 15, and 17 is a switch knob for turning on and off the power switch. Also 1
8 is a floor nozzle with a built-in rotating brush, 19 is a lamp part for illuminating the floor, 20 is a bumper to prevent damage to furniture, etc., 21 is a back plate for smooth running, and 22 is a rotating brush. This is a switching knob for rotating and stopping.

FIG. 2 shows the rotary brush drive control device in the floor nozzle 18, ie 23 is the rotary brush and the first
The first pulley is connected by a belt 24, 25 is a magnet fixed to the first pulley 23, 26 is a Hall element for detecting changes in the magnetic field due to the rotation of the magnet 25, and 27 is a fixing and wiring of the Hall element 26. The substrate 28 is a holder for fixing the Hall element 26 to the shaft 29. 31 is the electric motor and the second
A second pulley 33 is connected by a belt 32 and rotates together with the first pulley 23, and 33 is a third pulley supported on a shaft 29 completely independently of the first pulley 23 and the second pulley 31. 3
4, 35, 36 are pulleys 23, 31, 33 respectively
This is a ball bearing for rotatably attaching the shaft 29 to the shaft 29. Changes in the magnetic field caused by the rotation of the magnet 25, that is, the rotation of the first pulley 23, are detected by the Hall element 26, converted into changes in voltage, and sent to the control circuit through the lead wire 30. When it reaches a certain level, a control circuit is activated to automatically turn off the power to the motor and prevent the belt from locking. Here, since the first pulley 23 and the Hall element 26 are attached to the same shaft 29, the relative position between them can be determined with extremely high precision, and operational reliability can be dramatically improved. . This has made it possible to create a rotary brush drive control device that was previously difficult to mass produce. .

Effects of the Invention As described in the above embodiments, the vacuum cleaner according to the present invention improves the low operational reliability that conventional devices had, and dramatically improves its reliability.
This has the effect of enabling mass production.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vacuum cleaner showing an embodiment of the present invention, FIG. 2 is a sectional view of a rotating brush drive control section,
FIG. 3 is a sectional view of a conventional rotary brush drive control section. 18... Floor nozzle, 25... Rotating body (magnet),
26...Sensor (Hall element).

Claims (1)

[Claims] 1 A first pulley with a belt stretched between it and the rotating brush, a second pulley with a belt stretched between it and the electric motor, and which rotates integrally with the first pulley.
A pulley is supported on a shaft, a holder with a Hall element attached thereto is attached to the shaft, and a magnet is disposed on the first pulley in correspondence with the Hall element,
Further, the Hall element is a vacuum cleaner connected to a control circuit of a motor.