A multi-position table includes a substructure for resting on a base, a superstructure pivotable between a first table position for use while sitting and a second table position for use while standing. The superstructure includes a first support associated with the first table position, the first support having a first top surface spaced a first distance from the base when the superstructure is in the first table position; a second support associated with the second table position, the second support having a second top surface spaced a second distance from the base when the superstructure is in the second table position, the second distance being different that the first distance. The table includes a locking member for locking a first and a second adjusting element together to prevent unintended movement from the first table position to the second table position or from the second table position to the first table position.

A desk platform structure for a fitness bike, including a desk platform, a desk platform fixing and sliding mechanism and a supporting rod is provided. The desk platform fixing and sliding mechanism includes a pair of fixing bars, a pair of sliding rails, and a fixing rack. The desk platform is installed on the fixing bars which are installed on the sliding rails. The sliding rails are fixed on guiding bars at two sides of the fixing rack which is connected to the supporting rod. A braking mechanism and a control mechanism for sliding and positioning of the fixing bar are disposed between the fixing bar and the fixing rack. Accordingly, the desk platform is more stable and reliable, and may slide and be positioned at any location. It is convenient to use the desk platform by further adjusting the inclination angle of the desk platform.

An automatic elevation-adjusting system includes an elevating unit, a control panel, a setting module, a calculating module and a central control module. The control panel includes a power icon, a direction icon unit, a setting icon, and a mode icon unit. The setting icon is operable to actuate the setting module to allow a user to press the direction icon unit and the power icon to enter data including a name, height, sex and age. The calculating module calculates average elevations for playing games, writing, reading and standing based on the user's sex and age, a pre-set specification of the table and an average height corresponding to the user's sex and age. The central control module actuates the elevating unit to move a table to the average elevation for playing games, writing, reading or standing when the game, writing, reading or standing icon of the mode icon unit is pressed.

A desk platform structure for a fitness bike, including a desk platform, a desk platform fixing and sliding mechanism and a supporting rod is provided. The desk platform fixing and sliding mechanism includes a pair of fixing bars, a pair of sliding rails, and a fixing rack. The desk platform is installed on the fixing bars which are installed on the sliding rails. The sliding rails are fixed on guiding bars at two sides of the fixing rack which is connected to the supporting rod. A braking mechanism and a control mechanism for sliding and positioning of the fixing bar are disposed between the fixing bar and the fixing rack. Accordingly, the desk platform is more stable and reliable, and may slide and be positioned at any location. It is convenient to use the desk platform by further adjusting the inclination angle of the desk platform.

An adjustment mechanism, including a first, second and third element pivotally connected to each other in series; locking means to lock the respective elements in a selected position relative to each other; and a pushbutton actuating mechanism that releases the locking means such that the elements are independently pivotal with respect to each other and release of the pushbutton actuating mechanisms re-engages the locking means.

An adjustment mechanism, including a first, second and third element pivotally connected to each other in series; locking means to lock the respective elements in a selected position relative to each other; and a pushbutton actuating mechanism that releases the locking means such that the elements are independently pivotal with respect to each other and release of the pushbutton actuating mechanisms re-engages the locking means.

A holder for a tablet, comprising a plate having a flat, planar front side for placing a tablet thereon, and a backside. The plate is generally rectangular in shape and having four corners with rotatable retention members disposed at three of the four corners. Each of the retention members are seated in a notch of the plate and all the retention members are rotatable to a position to form a continuous, flat surface along the plate and are rotatable to positions to retain a tablet on the holder.

A multi-position table includes a substructure for resting on a base, a superstructure pivotable between a first table position for use while sitting and a second table position for use while standing. The superstructure includes a first support associated with the first table position, the first support having a first top surface spaced a first distance from the base when the superstructure is in the first table position; a second support associated with the second table position, the second support having a second top surface spaced a second distance from the base when the superstructure is in the second table position, the second distance being different that the first distance. The table includes a locking member for locking a first and a second adjusting element together to prevent unintended movement from the first table position to the second table position or from the second table position to the first table position.

A stand for supporting a book in an inclined reading position having a resting surface, which tilts back such that the book rests at an incline; a shelf surface, which prevents the book pages and book from sliding down and off the resting surface; and a groove between the shelf surface and resting surface, into which the cover of a book may be inserted such that a majority number of the book pages rest on the shelf surface.

A stand for supporting a book in an inclined reading position having a resting surface, which tilts back such that the book rests at an incline; a shelf surface, which prevents the book pages and book from sliding down and off the resting surface; and a groove between the shelf surface and resting surface, into which the cover of a book may be inserted such that a majority number of the book pages rest on the shelf surface.