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Electro-mechanical actuator system, for instance for adjustable furniture

An actuation system, adjustable technology, applied in the direction of using electric devices, using electromagnetic means, using thermometers with direct heat-sensitive electric/magnetic elements, etc., can solve problems such as damage to control units

Active Publication Date: 2009-04-01
LINAK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with thermal fuses is that before the fuse is activated, it can cause continuous damage to the rest of the control unit

Method used

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  • Electro-mechanical actuator system, for instance for adjustable furniture

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Embodiment Construction

[0011] The embodiment shown in the drawing comprises four diodes D1, D2, D3, D4 arranged in parallel, which are connected to a power supply and to a multimeter. Very critically, the diodes are located in the actuation system, which is generally known to overheat both as a result of overload and also as a result of defects. Such critical locations can eg be connected with FET transistors for controlling actuators. If the area surrounding eg diode D2 becomes hotter than the area surrounding the other diodes, the voltage will drop due to the fact that the resistance within this diode drops. This is recorded by the multimeter V and based on this signal the current to the motor will be cut off.

[0012] Although the invention has been described in terms of furniture, it is clear that the invention can be used in conjunction with other applications of the actuation system.

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Abstract

An electro-mechanical actuator system, for instance for furniture, where the power supply and / or the electric control unit comprises at least one thermal diode, where the voltage is inverse proportional to the temperature and calibrated so that a given voltage is converted into a given temperature, and where the control unit is arranged so that the current for the motor of the actuator is cut off at a predetermined critical temperature. Hereby, a relatively inexpensive and accurate protection from superheating of the actuator system is achieved.

Description

technical field [0001] The invention relates to an electro-mechanical actuation system, eg for adjustable furniture, as stated in the preamble of claim 1 . Actuation systems of this type are known, for example, from WO02 / 29284A1 to Linak A / S, WO01 / 17401A1 to Linak A / S and WO89 / 10715A1 to Dewert, which relate to linear actuators, rotary actuators, respectively and dual actuators. Actuation systems in particular for height adjustable tables are also known with reference to eg WO02 / 39848A1 to Linak A / S application and EP1079511A1 to Linak A / S application for linear actuators and power supply / control units respectively. Background technique [0002] In recent years, there has been a significant interest in electrically adjustable furniture as similar products have been developed to bring down the price of furniture to a price level that makes them available to the common man. [0003] In order to cater to the demand for product price reduction, the knowledge that the furniture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04H02H7/085
CPCG01K3/005G01K7/01
Inventor J·C·巴斯特霍尔姆
Owner LINAK AS