Patent Application
20090146028
1. Field of the Invention
This invention relates to an elevating display device for the worktable of a manual planer, particularly to one able to accurately measure a height adjusting numerical value of the worktable of a manual planer.
2. Description of the Prior Art
A conventional manual planer, as shown in
The objective of this invention is to offer an elevating display device for the worktable of a manual planer, including a driving unit assembled at one side of a movable worktable and provided with a fixed rod fitted thereon with a sliding sleeve to be moved together with the worktable. The sliding sleeve is secured with an engaging plate having at least one side disposed with engaging teeth, so that when moved by the sliding sleeve, the engaging plate can actuate an interacting unit positioned at the front side of the driving unit to move. The interacting unit consists of a graduated dial and a gear engaged with the engaging teeth of the engaging plate. When driven by the driving unit to move, the interacting unit will actuate the graduated dial to rotate and simultaneously a sensing-and-reading head engaged on the circumference of the graduated dial will sense signals of plural signal sets disposed on the graduated dial and transmit the signals to a display member, which can directly indicate an adjusted numerical value of the height of the worktable. The elevating display device in the present invention is convenient in operating and able to accurately indicate an adjusted numerical value of the height of the worktable, enabling an operator to read the numerical value precisely without causing visual errors.
This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of an elevating display device for the worktable of a manual planer 100 in the present invention, as shown in
The fixed block 50, referring to
The driving unit 60 is provided with a square and shell-shaped assembly base 61 provided with a cover 90 bored with a circular hole 91 in its right side. The assembly base 61 has its left side bored with an opening 611 at a location corresponding to the fixed block 50 for receiving the fixed block 50 therein to enable the fixed block 50 to shift in the space of the opening 611. The assembly base 61 has its lower end secured on the rear side of the machine base 10. Further, the assembly base 61 is axially fixed with a fixed rod 62 having its upper and lower end respectively locked on the left end of the assembly base 61 by means of two bolts 621 and 622, which are respectively inserted through the upper and the lower end of the fixed rod 62, and then respectively inserted through two transverse bars 623 and 624 and fixedly locked on a corresponding side of the assembly base 61, with a gap formed between the fixed rod 62 and the assembly base 61. The fixed rod 62 is fitted thereon with a cylindrical sliding sleeve 63 facing the opening 611 of the assembly base 61 and able to slide up and down on the fixed rod 62. Referring to
The interacting unit 70 is assembled at the front side of the driving unit 60 to be moved together with the engaging plate 64, provided with a circular plate graduated dial 71 having its circumference disposed with signal sets 72 preset in number at preset locations. The signal sets 72 consist of lots of notch-shaped transparent portions 721 and opaque portions 722, which are staggered and arranged equidistantly around the circumference of the graduated dial 71. The graduated dial 71 has a circular hole 711 its center bored, and an interacting rod 73 is pivotally inserted through the circular hole 711 and then inserted in and fixed with a circular cover 74. The interacting rod 73 has an end inserted through a transverse rectangular interacting block 75, which is transversely and orderly bored with three through holes 751, 752 and 753 positioned in parallel, and the interacting rod 73 is inserted through the through hole 751 to let the interacting block 75 extended diametrically along the inner side of the graduated dial 71 and positioned parallel to the graduated dial 71. The interacting block 75 is adjacent to the engaging plate 64 and positioned at the same side of the engaging teeth 641. Two shafts 76 are respectively inserted through the through holes 752 and 753 of the interacting block 75, respectively having one end secured on the inner side of the graduated dial 71 and the other end inserted through an insert hole 612 of the assembly base 61. Thus, the interacting block 75 can be restrictedly positioned at one side of the graduated dial 71 but cannot be moved bias by rotating of the graduated dial 71. Further, the interacting block 75 has its rear end corresponding to the engaging teeth 641 formed with a dented corner 754 matching with the through hole 751. After inserted through the dented corner 754, the interacting rod 73 has its end locked with a bolt 731 pivotally fitted thereon with a planetary gear 732 to be engaged with the engaging teeth 641 of the engaging plate 64 and fixed in position by a gasket 733.
The sensor unit 80 is positioned at the right circumference of the graduated dial 71 and provided with a sensing-and-reading head 81 having its front end cut with an engaging notch 811 to be engaged with the outer circumference of the graduated dial 71 and corresponding to the signal sets 72. The sensing-and-reading head 81 has one side bent and extended to form a plate 812 to be secured on a corresponding side of the assembly base 61, with a preset angle formed between the sensing-and-reading head 81 and the graduated dial 71 so as to enable the sensing-and-reading head 81 to sense signals of the signal sets 72 of the graduated dial 71. The sensing-and-reading head 81 has another end combined with one end of a flexible signal wire 82, which has its free end inserted through the circular hole 91 of the cover 90 and assembled with a display member 83 positioned outside the cover 90 and able to be adjusted in its level above the worktable 20 by the flexible signal wire 82. The indicating member 83 is provided inside with a micro-chip set (not shown) for receiving signals sent out by the sensing-and-reading head 81, and has its outer side disposed with a digit indicating faceplate 831 for indicating an adjusted numerical value of the height of the worktable 20, and plural set switches 832 for carrying out other affiliated functions, such as a function of changeover between metric system and British system for a numerical value indicated by the digit indicating faceplate 831 or a function of return-to-zero.
To adjust the movable worktable 20 to move up or down on the machine base 10, firstly, the rotary disk 31 of the elevating mechanism 30 is turned in a preset direction. When the worktable 20 is moved, the driving unit 60 at the opposite side of the elevating mechanism 30 will be actuated to move, and the rotatable member 65 on the shaft rod 631 of the sliding sleeve 63 will be actuated to push against and turn around the inner side of the slide groove 51 of the fixed block 50, keeping the driving unit 60 from moving bias transversely, and simultaneously the sliding sleeve 63 will be actuated to slide up and down on the fixed rod 62.
Referring to
As can be understood from the above description, this invention has the following advantages.
1. The interacting unit is driven by the driving unit to move and actuate the graduated dial to rotate, and simultaneously the sensing-and-reading head will sense a signal via the signal sets on the graduated dial and transmit the signal to the display member for directly and accurately indicating an adjusted numerical value of the height of the worktable to be read conveniently by an operator, impossible to cause visual errors and able to elevate precision in adjustment of the worktable.
2. The display member of the sensor unit can be adjusted in position by the flexible signal wire; therefore, an operator can adjust the display member to a proper position above the worktable for facilitating reading the numerical value indicated thereon. In addition, the display member is disposed thereon with a plurality of set switches having a function of changeover of indicated numerical value between metric system and British system or a function of return-to-zero, attaining multifunction practicability.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.
