Base seat structure for liquid crystal type display

A base seat structure for liquid crystal type display, including a base seat having a seat face, a support pivotally connected on the seat face and a bridge mechanism disposed on the seat face and having a sleeve member. An adjustment rod is passed through the sleeve member with a tail end pivotally connected with the support for controlling the movement and position of the support so as to adjust the observation angle of the display.

BACKGROUND OF THE INVENTION 
The present invention relates to a base seat structure for liquid crystal 
type display, which stably locates the display and enables a user to 
freely adjust the observation angle thereof. 
It is known that a liquid crystal type display is installed on a base seat 
which permits the observation angle of the display to be adjusted. The 
base seat is equipped with a support which is pivotally connected 
therewith by a pivot shaft for retaining the display. 
The pivot shaft includes hinge mechanism and resilient members to provide 
fastening force and frictional force so as to locate the support at 
different angles. The pivot shaft is always kept fastened to bear the 
weight of the display so that when adjusting the angle of the display, a 
considerably great force must be exerted onto the support against the 
frictional force. After a period of use, the pivot shaft is subject to 
wearing and tends to loosen. As a result, it will become difficult to 
reliably locate the display at a desired observation angle. 
Also, the fastening structure of the pivot shaft is relatively fine and 
sophisticated. It is difficult to install the fastening structure into the 
narrow interior of the pivot shaft and it is necessary to further process 
the pivot shaft. Therefore, the manufacturing cost is increased. 
SUMMARY OF THE INVENTION 
It is a primary object of the present invention to provide a base seat 
structure for liquid crystal display, which has simple structure and is 
able to more reliably locate the display at a desired observation angle 
without loosening even in the case that the display is hung on a wall. 
According to the above object, the base seat structure of the present 
invention includes a base seat having a seat face, a support pivotally 
connected on the seat face and a bridge mechanism disposed on the seat 
face and having a sleeve member. An adjustment rod is passed through the 
sleeve member with a tail end pivotally connected with the support for 
controlling the movement and position of the support so as to adjust the 
observation angle of the display.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Please refer to FIGS. 1 and 2. The present invention includes a base seat 
10 having a seat face 11 disposed with two projections 111 for pivotally 
connecting with a support 20 of the liquid crystal type display 50. A 
bridge mechanism 30 is disposed on the seat face 11 in front of the 
support 20, including a lug member 31 fixed on the seat face 11 and a 
pivotable housing 32 pivotally connected on the lug member 31. The housing 
32 includes a sleeve member 321 disposed therein and formed with thread 
hole 322, whereby an adjustment rod 40 with a thread rod 41 can be screwed 
through the thread hole 322 with an end 42 pivotally located in a pivot 
section 211 of a transverse shaft 21 of the support 20. Accordingly, the 
adjustment rod 40 is more stably assembled with the support 20. 
Referring to FIGS. 3 and 4, the angle of the support 20 is controlled by 
the cooperation position of the adjustment rod 40 and the bridge mechanism 
30. In the case that the head end 43 of the adjustment rod 4 is close to 
the bridge mechanism 30 and the sleeve member 321, the support 20 is 
adjacent to the seat face 11 as shown in FIG. 3. In the case that the head 
end 43 is away from the bridge mechanism 30 and the sleeve member 321, the 
tail end 42 of the adjustment rod located on the shaft member 21 will 
drive the support 20 to rotate and change the observation angle of the 
display 50. 
The advantages of the present invention are as follows: 
1. The housing 32 of the bridge mechanism 30 is pivotally connected with 
the lug member 31, whereby the housing 32 can be moved within a set range 
relative to the change of angle of the support 20 and the adjustment rod 
40 without interference. 
2. By means of cooperation between the adjustment rod 40 and the sleeve 
member 321, the observation angle of the support 20 and the display 50 can 
be adjusted and accurately fixed. This is applicable to the situation that 
the base seat is hung on a wall with the display extending outward as 
shown in FIG. 5. 
After passed through the sleeve member 321, the adjustment rod 40 can 
control the movement of the support 20 and locate the same. 
It should be noted that the above description and accompanying drawings are 
only used to illustrate one embodiment of the present invention, not 
intended to limit the scope thereof. Any modification of the embodiment 
should fall within the scope of the present invention.