JPH07197946A - Clutch plate - Google Patents

Abstract

PURPOSE:To instantaneously transmit and interrupt power by scatterdly forming elastic rubber projections on a sliding surface of a driving part, and forming a viscous layer lower than the projections on the portion other than the projections with slight spaces. CONSTITUTION:Semi-circular projections 2 each having a diameter 1mm are scatterdly formed on a surface of a clutch plate 1 with spacings, by NBR having Shore A hardness of 50 degrees. A layer lower than the projection composed of viscous acrylic double-sided tape is formed on a portion other than the projections 2 with a slight spaces so as not to contact with the projections 2. When a clutch driving part is compressed to a reception part, the projections 2 are contracted by compression. In the case that the projections have the same level of the viscous layer, the viscous layer is in contact with the reception part. Driving force such as rotation is transmitted under strong frictional resistance cased by viscosity. When the compression of the driving part is released, the projections 2 are extended to release contact of the viscous member. Frictional resistance is reduced and transmission is instantaneously interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch plate for transmitting rotation of a drive unit to a passive unit, particularly for electric appliances.

[0002]

2. Description of the Related Art In a conventional clutch plate, the surfaces of a driving portion and a passive portion both have a concavo-convex structure, and transmission of rotation or the like is carried out by engaging them, or the surface of the passive portion is a flat surface and is pressed. There is a material that transmits a force such as rotation by frictional resistance, and rubber or sponge having good compression elasticity is used as a material for improving frictional resistance and thus having poor slipperiness.

[0003]

The conventional clutch structure based on the engagement of the concavo-convex surface structure cannot transmit and disconnect the instantaneous force, and when the passive side is a flat surface, it increases the pressing force on the drive side and produces a strong frictional resistance. In order to transmit the rotating force and the like downward, one of them requires a strong pressing force on the drive unit.

Further, when a rubber material having a good frictional resistance is used, there is a drawback that separation does not occur instantly even if the clutch is disengaged due to the adhesiveness of the rubber. Furthermore, when a sponge material is used, the elasticity is strong and the disengageability of the clutch is good, but this time, on the contrary, it has a drawback that it is difficult to obtain a large friction resistance and is easily worn.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a plurality of elastic rubber protrusions are formed on the friction surface of the clutch drive part in a scattered manner, and a layer of an adhesive material is formed at intervals between the protrusions. The clutch plate. As the rubber material of the protrusion of the elastic rubber to be used, silicone type, butyl type, fluorine type,
There is no particular limitation such as NBR type and PT type, but those having a small compression set and a small adhesiveness are preferable. There is no restriction on the adhesive material such as synthetic rubber type, acrylic type, and silicone type, but it is desirable that the adhesive has excellent adhesiveness to the surface of the clutch drive portion.

[0006]

When the clutch drive unit of the present invention is compressed into the passive unit,
First, the elastic rubber protrusion is compressed and dented, and when the height becomes constant with the adhesive layer, the adhesive contacts the passive part,
Due to the adhesiveness of the adhesive material, driving force such as rotation is transmitted under strong frictional resistance. After that, when the compression of the drive unit is released, the rubber protrusion is also released from the compression and expands, the contact of the adhesive material is released, the frictional resistance is reduced, and the transmission is cut.

[0007]

The present invention will be described below with reference to the embodiments shown in the drawings.

On a surface of a simulated clutch plate 1 having a thickness of 3 mm serving as a clutch driving portion, hemispherical projections 2 having a radius of 1 mm are formed by NBR having a Sure A hardness of 50 degrees and are spread over the entire surface at intervals. After that, a slight gap was opened so as not to contact the protrusion 2, and a layer was formed in the gap between the protrusions with a double-sided tape (500, manufactured by Nitto Denko Corporation) of an acrylic adhesive material lower than the protrusions.

It has been confirmed by experiments that the clutch plate 1 does not move even if the clutch plate 1 of the present invention is placed on a table having good slipperiness and a glass plate having the same area is placed on the clutch plate 1 and slid. It was

[0010]

According to the present invention, at the same time as the compression of the driving portion is released, the force can be transmitted to and disconnected from the passive portion instantaneously, and at the time of transmitting the force, the adhesive force of the adhesive material transmits the force. The efficiency is high, and the clutch plate of the present invention has good durability because it can be used repeatedly until the protrusion return due to the compression set of the protrusion is lost or the tackiness of the adhesive material disappears.

Furthermore, since the surface of the driving portion has a concavo-convex structure, it is possible to cope with various shapes of the surface of the passive portion.

[Brief description of drawings]

FIG. 1 is a sectional view of a clutch plate.

FIG. 2 is a sectional view showing a state in which pressure is applied.

[Explanation of symbols]

 1 Clutch plate 2 Protrusion 3 Adhesive 4 Glass plate

Claims (2)

[Claims] 1. A drive unit friction surface is formed with a plurality of elastic rubber projections spread over the entire surface at intervals, and the projections have clearances between them, and the adhesive is lower than the height of the projections. A clutch plate formed by forming layers of material. 2. The clutch plate according to claim 1, wherein the projection is made of elastic rubber having a small compression set and a small adhesiveness.