Supporting shelf

Abstract

A supporting shelf includes a bearing seat, a first supporting arm, a second supporting arm, a third supporting arm and a setting seat. The bearing seat is pivotally connected with an end of the first supporting arm allowing the supporting shelf to swing left or right. An end of the second supporting arm is connected with another end of the first supporting arm through a pin-connected mechanism. An end of the third supporting arm is connected with another end of the second supporting arm. The setting seat is pivotally connected with a joint. The joint is pivotally connected with another end of the third supporting arm. The setting seat is for fixing a LCD moving up, down, left or right through the joint, whereby the length of the supporting shelf is increased, and the action area of the LCD is extended and is improved agility.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a supporting shelf and, more particularly, to a supporting shelf that is composed of a plurality of supporting arms, each of which is pivotally connected with each other. These supporting arms are extendable so that they can be adjusted to meet the user's needs.

2. Description of the Related Art

A common LCD screen with a supporting seat is usually set upon a table. Its user can adjust the viewing angle of the LCD for a more comfortable view. However, the design of the LCD is based upon it sitting upon a table, thus reducing the choices of viewing angles. In response to this problem, a supporting shelf was invented with a supporting arm attached to the LCD that allows the screen to be rotated. Thus such an LCD is not restricted by the supporting seat and can rotate freely.

The above-mentioned supporting shelf overcomes the restrictions in the action area of the single rotating supporting arm due to the arm's length.

For extending the action area of the LCD and increasing its agility, we the length of the supporting shelf must be increased whilst still allowing the supporting shelf to swing left or right and extend forwards or backwards to meet the user's needs.

SUMMARY OF THE INVENTION

It is therefore a principal objective of the present invention to provide a supporting shelf having an end attached to a LCD, which is composed of a plurality of supporting arms, and each of these supporting arms is pivotally connected with each other. These supporting arms are extendable between each other for extending the length of the supporting shelf to meet the user's needs.

To further achieve the above objective, one feature of the present invention is to provide for a supporting shelf including a bearing seat; at least a first supporting arm having an end pivotally connected with the bearing seat; a first air cylinder defined in an inner portion of the first supporting arm and through a first fixing screw rod to adjust the moment arm of the first air cylinder for adjusting a bearing of the supporting shelf; at least a second supporting arm having an end pivotally connected with another end of the first supporting arm through a pin-connected mechanism; a second air cylinder defined in an inner portion of the second supporting arm and through a second fixing screw rod to adjust the moment arm of the second air cylinder for adjusting a bearing of the supporting shelf; at least a third supporting arm having an end connected with another end of the second supporting arm; a joint pivotally connected with an other end of the third supporting arm; and a setting seat pivotally connected with the joint.

To provide a further understanding of the invention, the following detail description illustrates embodiments and examples of the invention, this detailed description being provided only for illustrating the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings included herein provide a further understanding of the invention. A brief introduction of the drawings is as follows:

FIG. 1 is a bottom plan view of a preferred embodiment of the present invention.

FIG. 2 is a side view of the preferred embodiment of the present invention.

FIG. 3 is an enlarged view of an A-part according to FIG. 2.

FIG. 4 is an enlarged view of a B-part according to FIG. 2.

FIG. 5 is an enlarged view of a C-part according to FIG. 2.

FIG. 6 is a first action view of the preferred embodiment of the present invention.

FIG. 7 is a second action view of the preferred embodiment of the present invention.

FIG. 8 is a third action view of the preferred embodiment of the present invention.

FIG. 9 is a fourth action view of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Referring now to the drawings wherein the showings are for the purpose of illustrating the preferred embodiments of the present invention only, and not for the purpose of limiting the same.

Referring to FIGS. 1 to 5, the present invention provides a supporting shelf including a bearing seat 10, a first supporting arm 20, a first air cylinder 21, a first fixing screw rod 30, a second supporting arm 40, a second air cylinder 41, a second fixing screw rod 50, a pin-connected mechanism 60, a third supporting arm 70, a setting seat 80, a joint 90, and a plurality of casings 100.

The bearing seat 10 is pivotally connected vertically with a rear end of the first supporting arm 20 through a pivot 11 for the supporting arm 20 when swinging left or right as shown in FIG. 7.

The first supporting arm 20 has the first air cylinder at an inner portion of it. There is a cross rod 22 and a pin-connected part 23 disposed at the inner portion of the first supporting arm 20. A front end of the first air cylinder 21 is pivotally connected to the cross rod 22. A rear end of the first air cylinder 21 is pivotally connected to the pin-connected part 23. Two opposite sides of the pin-connected part 23 extend with an axle 232 respectively. Two opposite side walls of the first supporting arm 20 form a slideway 24. The axles 232 fit with the slideway 24.

The first fixing screw rod 30 screws into the pin-connected part 23, so that the first fixing screw rod 30 adjusts the front or rearward position of the pin-connected part 23 as shown in FIG. 3. This allows the pin-connected part 23 to slide forward or backward in the slideway 24. Therefore, the moment arm of the first supporting arm 20 is changeable. As such, the amount of weight the first supporting arm 20 can bear is variable.

The second supporting arm 40 having a rear end is pivotally connected with a front end of the first supporting arm 20 through the pin-connected mechanism 60. Both the front end and the rear end of the pin-connected mechanism 60 have a pivot 61 respectively as shown in FIG. 4. The second supporting arm 40 and the first supporting arm 20 can extend forwards or backwards through the pivots 61 as shown in FIG. 8 and FIG. 9. The second supporting arm 40 has the second air cylinder 41 at an inner portion of it. There is a cross rod 42 and a pin-connected part 43 disposed at the inner portion of the second supporting arm 40. A front end of the second air cylinder 41 is pivotally connected to the cross rod 42. A rear end of the second air cylinder 41 is pivotally connected to the pin-connected part 43. Two opposite sides of the pin-connected part 43 extend with an axle 432 respectively. Two opposite side walls of the second supporting arm 40 form a slideway 44 respectively. The axles 432 fit with the slideways 44.

The second fixing screw rod 50 screws with the pin-connected part 43, so that the second fixing screw rod 50 can adjust the up or down position of the pin-connected part 43. Then the pin-connected part 43 can slide up or down in the slideway 44. Thereby, the moment arm of the first supporting arm 40 is changed. The first supporting arm 40 adjusts the bearing of the supporting shelf.

As shown in FIG. 5, a rear end of the third supporting arm 70 is connected vertically with a front end of the second supporting arm 40.

A front end of the setting seat 80 is attached to a LCD 120. The rear end of the setting seat 80 is pivotally connected with the front end of the joint 90 vertically. The joint 90 is pivotally connected with the front end of the third supporting arm 70 horizontally. The setting seat 80 allows the LCD 120 move up, down, left or right through the joint 90 as shown in FIG. 5 and FIG. 6.

Each of the casings 100 is a rectangular hollow casing. The casings 100 are disposed adjacent to a side edge of the supporting arms for receiving a wire 110 disposed on the supporting shelf as shown in FIG. 3. The casings 100 are for avoiding the wire 110 being exposed purely for aesthetic purposes.

So, the present invention has the following characteristics:

1. The bearing seat 10 is pivotally connected vertically with a rear end of the first supporting arm 20 through the pivot 11 for the supporting shelf swinging left or right. The second supporting arm 40 has a rear end that is pivotally connected with a front end of the first supporting arm 20 through the pin-connected mechanism 60 for the second supporting arm 40 and the first supporting arm 20 when they are extended forwards or backwards action. So the pivoted-connection between the second supporting arm 40 and the first supporting arm 20 is not only extending the length of the supporting shelf, but also increasing its agility in space to meet the different need of the user.

2. The first air cylinder 21 and the second air cylinder 41 adjust themselves, and their moment arms, through the first fixing screw rod 30 and the second fixing screw rod 50 respectively. Both the first and second fixing screw rods 30 and 50 adjust the bearing of the supporting shelf.

3. The setting seat 80 is pivotally connected with the joint 90 making the LCD 120 moving up, down, left or right through the joint 90 for extending the action area of the LCD 120 and increasing its agility.

There has thus been described a new, novel and heretofore unobvious supporting shelf eliminating the aforesaid problem in the prior art. Furthermore, those skilled in the art will readily appreciate that the above description is only illustrative of specific embodiments and examples of the invention. The invention should therefore cover various modifications and variations made to the herein-described structure and operations of the invention, provided they fall within the scope of the invention as defined in the following appended claims.

Claims

1. A supporting shelf, comprising:

A bearing seat;

At least a first supporting arm having an end pivotally connected with the bearing seat;

A first air cylinder defined in an inner portion of the first supporting arm and through a first fixing screw rod to adjust the moment arm of the first air cylinder for adjusting a bearing of the supporting shelf;

At least a second supporting arm having an end pivotally connected with another end of the first supporting arm through a pin-connected mechanism;

A second air cylinder defined in an inner portion of the second supporting arm and through a second fixing screw rod to adjust the moment arm of the second air cylinder for adjusting a bearing of the supporting shelf;

At least a third supporting arm having an end connected with another end of the second supporting arm;

A joint pivotally connected with an other end of the third supporting arm; and

A setting seat pivotally connected with the joint.

2. The supporting shelf of claim 1, further comprising a plurality of casings disposed on a side edge of the supporting shelf.

3. The supporting shelf of claim 1, wherein the bearing seat pivotally connects vertically with the end of the first supporting arm through a pivot for the supporting shelf when it is swung left or right.

4. The supporting shelf of claim 1, wherein the pin-connected mechanism is connected with both the first supporting arm and the second supporting arm for extending forwards or backwards both of the second supporting arm and the first supporting arm.

5. The supporting shelf of claim 1, wherein the setting seat attaches to a LCD monitor and allows the LCD monitor to move up, down, left or right through the joint.