referring to fig1 , an embodiment of a height adjustment mechanism in accordance with the present invention preferably consists of a height adjustment cover plate 10 incorporated into a portion of a juvenile product , such as a tower 12 on a multiple infant activity center 14 . the plate 10 preferably includes a channel 16 shaped to receive a rotatable knob 18 slidingly therethrough and which preferably includes at least 2 adjustment lobes 20 that are attached by narrow channels 21 . the knob 18 preferably includes a transverse handle 22 shaped for easy manipulation by a caregiver . as shown best in fig4 , the rotatable knob 18 preferably includes a shank portion 24 and an end cap portion 26 . the shank portion 24 is preferably rectangular in cross section and narrow , the long portions thereof being in parallel alignment with the transverse handle 22 . the end cap portion 26 is preferably round in shape . preferably , the height adjustment mechanism of the present invention includes an adjustment slider 28 . the adjustment slider 28 preferably includes an engagement portion 30 having downwardly and inwardly extending tabs 32 that is shaped to receive a portion of the rotatable knob 18 . preferably , the tabs 32 are shaped and sized so that when the end cap portion 26 of the rotatable knob 18 is pushed therethrough during assembly , the tabs 32 capture the rotatable knob 18 in a secure , rotatable manner . preferably the adjustment slider 28 is shaped to be held within a channel 34 created in the juvenile product to provide for easier sliding of the slider 28 , and attached rotatable knob 18 . preferably the slider 28 includes a smooth upper portion 38 to facilitate sliding thereof and an attachment portion 40 for attaching the slider to a tether 42 or other portion of a juvenile product needing adjustment . in operation , a caregiver may rotate the adjustable knob 18 transverse handle 22 so that the handle is parallel to the narrow channels 21 thus allowing the rectangular shank 24 of the rotatable knob 18 to slide within channel 16 . then when the desired adjustment position is reached , i . e . the desired lobe 20 of the channel 16 , the caregiver rotates the transverse handle 22 to a position transverse to the channel 16 , thereby securely locking the slider 28 , and anything attached thereto by attachment portion 40 , securely in place . following from the above description and invention summaries it should be apparent to those of ordinary skill in the art that , while the systems and processes herein described constitute exemplary embodiments of the present invention , it is understood that the invention is not limited to these precise systems and processes and that changes may be made therein without departing from the scope of the invention as defined by the following claims . additionally , it is to be understood that the invention is defined by the claims and it is not intended that any limitations or elements describing the exemplary embodiments set forth herein are to be incorporated into the meanings of the claims unless such limitations or elements are explicitly listed in the claims . likewise , it is to be understood that it is not necessary to meet any or all of the identified advantages or objects of the invention disclosed herein in order to fall within the scope of any claim , as the invention is defined by the claims and because inherent and / or unforeseen advantages of the present invention may exist even though they may not have been explicitly discussed herein .
a juvenile product height adjustment mechanism which allows for easy , secure adjustment by a caregiver is comprised of a rotatable knob received within a sliding channel and rotatably but securely attached to a slider .