Length adjusting device for biofeedback training instrument

The utility model provides a biofeedback training instrument length adjusting device which comprises an outer shell, an inner shell and a tooth rack adjusting mechanism, and the tooth rack adjusting mechanism is arranged between the outer shell and the inner shell. The tooth rack adjusting mechanisms are arranged between the inner shell and the outer shell, the size of the training instrument body is adjusted through parallel movement of the tooth rack adjusting mechanisms, people can wear the training instrument conveniently, the tooth rack adjusting mechanisms are plane mechanisms and have the advantage of being small in occupied space, the whole product is thinned and lightened, and the training instrument is convenient to use. And the comfort level is greatly improved. 本实用新型提供了一种生物反馈训练仪长度调节装置，包括外壳、内壳和齿牙齿条调节机构，所述齿牙齿条调节机构设置在所述外壳和所述内壳之间。本实用新型齿牙齿条调节机构设置在内壳和外壳之间，通过齿牙齿条调节机构的相互平行移动，实现训练仪本体大小的调节，方便人员进行佩戴，齿牙齿条调节机构为平面机构，具有占用空间小的特点，产品整体变薄，变轻，舒适度得到极大的提高。