| 摘要 |
An adjustable chair (10) including a control system based around a microprocessor and operated by way of switches (58, 60, 62, 64, 66, 68) preferably located on each side (14a, 14b) of the seat back (14). The switches (58-68) are low voltage flat membrane switches by which the operator moves the chair (10) to a desired position. The switches (58-68) present a low voltage and sterile environment for both the operator and the patient. Switches (58, 60, 62, 64) can also be easily programmed by the operator to act either in a "momentary" fashion to cause movement of the chair (10) only as long as they are depressed or in a "maintaining" fashion whereby a single depression of a switch causes selected movement of the chair (10) until such movvement is stopped by, for example, a limit switch. In addition, switch (60) can also easily be programmed by the operator to alternatively act as either a recline switch or an "auto up" switch. The "auto up" switch (60) causes the chair to assume a raised and reclined position suitable for performing a specific medical procedure. The control system of the present invention further provides a switch disable feature which allows the operator to easily program the system to disable the switches thereby preventing unauthorized, potentially dangerous of damaging operation of the chair (10). A selectively operable switch beep on feature is also disclosed.
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