JPS6192135A - Using time indicator - Google Patents

Abstract

PURPOSE:To readily detect the wear amount of a carbon brush by observing from the exterior through a window formed at a case of a device the state of a pointer mounted integrally with the carbon brush of a commutator motor. CONSTITUTION:A carbon brush 3 is contained in a carbon brush cap 4, and pressed by a spring 5 toward a commutator 2. A pointer 6 is integrally mounted with the brush 3 to move in the direction of an arrow as the brush 3 wears. The position of the pointer 6 is visible from the exterior through a window formed at a motor case (not shown). Thus, the detection of the wear of the brush 3 is facilitated to effectively exchange the brush. This is adapted for a device using a domestic commutator motor.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a usage time display device for electric equipment using a commutator motor as a power source.

Conventional configurations and their problems Conventionally, household commutator motor electric appliances have very rarely been equipped with operating time display devices, and some appliances that have this type of device have an hour display on the circuit. It was common to have a built-in meter. However, this method is very expensive and has the problem that the display time and the carbon brush life of the commutator motor (carbon plan replacement time) do not necessarily match.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides an IJ 11 hour display device that is inexpensive and that accurately indicates the carbon plano lifespan (replacement time).

Structure of the Invention The operating time display device of the present invention has a pointer integrally formed with the carbon brush of the commutator motor so that it can be seen through a window provided outside the main body. By doing so, the change in the finger blade part that moves with the carbon brush which decreases with use will inform the total usage time of the device and the appropriate time to replace the carbon plan.

DESCRIPTION OF EMBODIMENTS An embodiment in which the present invention is applied to a vacuum cleaner will be described below with reference to the accompanying drawings. In FIGS. 1 to 6, 1 is a commutator motor for a vacuum cleaner incorporating a circular fan, 2 is a commutator that constitutes a part of the commutator motor 1, 3 is a carbon flage, and 4 are the same≦carbon brush cap, 6 is a spring that presses the carbon brush 3 against the commutator, and 6 is a pointer unit that is integrally formed with the carbon brush 3 by being press-fitted into a hole provided in the carbon brush 3. , 7 is a vacuum cleaner incorporating the commutator motor 1, and 8 is a transparent display window provided on the top surface of the vacuum cleaner 7 outside the main body.

To explain the operation in the above configuration, when the vacuum cleaner body is used, that is, when the commutator motor 1 is operated, the carbon brush 3 is reduced due to friction with the commutator 2, and according to this reduction amount, the carbon brush 3 is integrally reduced. The shaped pointer moves. Once the rotational speed of the commutator motor 1 and the material of the carbon brush 3 are determined, the amount of decrease in the carbon brush 3 can be determined in a unified manner by comparing it with the usage time, and therefore the amount of change in the pointer section 6 is used. The time can be displayed on the display window 8, and the lifespan (replacement time) of the carbon brush 3 can be clearly indicated.

In addition, in the above embodiment, the display content is limited to 5'+1Ll- as "usage time", or depending on the device to which it is applied, it may be applied to other purposes related to usage time.
For example, taking the vacuum cleaner as an example, it is also possible to display a ``garbage disposal time display'' to indicate when it is time to throw away the garbage after a certain period of use.

In addition, in the above embodiment, the pointer part was made up of a carbon brush and a separate part, but considering the positional relationship with the display window, etc.
It is also possible to form the pointer part as part of the carbon brush itself.
1 function, and a display device that is inexpensive can also be easily constructed.

Effects of the Invention As is clear from the above embodiments, the use time display device of the present invention is an inexpensive and reliable display device because the amount of carbon brush reduction can be directly viewed from the outside of the device. In addition, by considering the display contents, the scope of application can be easily expanded.

[Brief explanation of the drawing]

2 is an enlarged sectional view of the same essential parts, 3 is a perspective view of the vacuum cleaner showing the same embodiment, 4 is a longitudinal sectional view of the vacuum cleaner, and 6 is a cross-sectional view of the vacuum cleaner. The top view and FIG. 6 are enlarged views of the same essential parts. 3...Carbon brush, 6...Pointer section, 8...Display window. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure a) (No) Figure 2 Figure 43

Claims (1)

[Claims] Use in equipment powered by a commutator motor, consisting of a pointer integrally formed with the carbon brush and a display window provided outside the equipment so that the amount of reduction in the carbon brush of the commutator motor can be seen from outside the equipment. Time display device.