Adjustment device that controls a tilting angle of a table top

Abstract

An adjustment device, having a tilting piece at a top front portion of a shell and rotates about a top front edge of the shell; a gear is at one side of the shell and fixedly connected to one side of the tilting piece, and is rotatable synchronously with the tilting piece; a position limiting piece is provided at a rear side of the gear, and is capable of engaging with the gear; a driving piece is provided in an inclined manner inside the shell; the driving piece and the position limiting piece are connected through a driving rod that passes through an inner side wall of the shell and drives the position limiting piece to move; a far end of the driving piece is connected with one end of a control string; another end of the control string is extended out of the shell to be pulled or released.

Claims

1. An adjustment device that controls a tilting angle of a table top, comprising a shell, characterized by also comprising a tilting piece, a gear, a position limiting piece and a driving piece; the tilting piece is provided at a top front portion of the shell and rotates about a top front edge of the shell; the gear is provided at one side of the shell; the gear is fixedly connected to a side portion of the tilting piece, and is rotatable synchronously with the tilting piece; the position limiting piece is provided at a rear side of the gear, and is provided with a teethed portion that is capable of engaging with the gear to limit rotation of the gear; the driving piece is provided in an inclined manner inside the shell such that the driving piece has a proximal end and a far end with respect to the side of the shell; the far end of the driving piece is connected to one end of a control string; the proximal end of the driving piece is attached to the an inner side wall of the shell corresponding to the side of the shell where the gear and the position limiting piece are provided; the driving piece and the position limiting piece are connected through a driving rod; the driving rod also passes through the inner side wall of the shell corresponding to the side of the shell where the gear and the position limiting piece are provided, and the driving rod drives the position limiting piece to move; another end of the control string is extended out of the shell adapted to be pulled or released by a user to move the position limiting piece through the driving piece and the driving rod to engage the position limiting piece with the gear or to move the position limiting piece away from the gear to disengage from the gear; one side of the shell is provided with a press handle: a bottom part of the shell is connected with a pneumatic cylinder; a top side of the pneumatic cylinder is provided with a touch switch which is positioned inside the shell when the shell and the pneumatic cylinder are connected: the touch switch corresponds to one end of the press handle such that the press handle controls touching of said end of the press handle with the touch switch.

2. The adjustment device of claim 1, wherein said another end of the control string is provided with a string control handle; the string control handle comprises a hand-held portion; a press portion is connected to the hand-held portion to allow finger operation of the string control handle.

3. The adjustment device of claim 1, wherein the tilting piece has a sectional shape of an inverted U-shape.

4. The adjustment device of claim 1, wherein a bottom part of the pneumatic cylinder is connected to a supporting base; the supporting base has four legs separated from one another, and each of the four legs is provided with an omnidirectional wheel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic structural view of the present invention.

(2) FIG. 2 is a schematic internal structural view of the shell of the present invention.

(3) FIG. 3 is another structural view of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(4) As shown in FIGS. 1-3, an adjustment device that controls a tilting angle of a table top according to the present invention comprises a shell 2, a tilting piece 5, a gear 7, a position limiting piece 8 and a driving piece 9. The shell 2 is a rectangular box. The tilting piece 5 is adapted to connect with the table top; the tilting piece 5 has a sectional shape of an inverted U-shape. During connection, the tilting piece 5 is connected to the shell, covering a top front portion of the shell 2; a bended portion 51 is provided at each of two sides of the tilting piece 5, and each bended portion is provided with a pin hole through which a pin is inserted to connect the tilting piece with the shell and allows the tilting piece to rotate with respect to the shell. The gear 7 is provided on a left side of the shell 2; the gear 7 is fixedly connected with a corresponding bended portion 51 (one of the two bended portions 51); the tilting piece 5 and the gear 7 are connected with the corresponding side of the shell 2 through the pin 71 and pin holes on the tilting piece, the gear and the shell. As such, the tilting piece 5 and the gear 7 can be rotated synchronously on the shell 2. The tilting piece 5 rotates with respect to the shell 2 about a top front edge of the shell 2. The position limiting piece 8 is provided at a rear side of the gear 7; one end of the position limiting piece 8 is provided with a teethed portion that is capable of engaging with the gear 7 to limit rotation of the gear 7. The driving piece 9 is provided in an inclined manner inside the shell 2 such that the driving piece 9 has a proximal end and a far end with respect to the side of the shell where the gear and the position limiting piece are provided; the far end of the driving piece 9 is connected to one end of a control string 61; another end of the control string 61 is extended out of the shell 2; the proximal end of the driving piece 9 is attached to the an inner side wall of the shell corresponding to the side of the shell where the gear and the position limiting piece are provided. The driving piece 9 and the position limiting piece 8 are connected through a driving rod 91; the driving rod 91 also passes through the inner side wall of the shell corresponding to the side of the shell where the gear and the position limiting piece are provided, and the driving rod 91 drives the position limiting piece 8 to move so as to control engagement of the position limiting piece 8 with the gear 7. In operation, user can simply pull or release the control string to move the position limiting piece 8 via the driving piece 9; for example, when the control string is pulled, the position limiting piece 8 moves away from the gear 7 to disengage from the gear 7; in the other way round, when the control string is released, the position limiting piece 8 resets and engages again with the gear 7.

(5) In a preferred embodiment, said another end of the control string 61 is provided with to string control handle; the string control handle comprises a hand-held portion 63 and a press portion 62; the press portion 62 is formed in a shape of a flat plate; an included angle is formed between a connecting part between the hand-held portion 63 and the press portion 62. The hand-held portion 63 facilitates holding of the same in a palm of the user, and the press portion 62 facilitates pressing operation by fingers. By squeezing under the cooperative force achieved by the palm and fingers of the user, pulling of the control string becomes effort-saving.

(6) In a preferred embodiment, one side of the shell 2 is provided with a press handle 4, and a bottom part of the shell 2 is connected with a pneumatic cylinder 3. A top side of the pneumatic cylinder 3 is provided with a touch switch 31 which is positioned inside the shell 2 when the shell 2 and the pneumatic cylinder 3 are connected. The touch switch 31 corresponds to one end of the press handle 4 such that the press handle 4 can control touching with the touch switch 31 to control the up-down movement of the pneumatic cylinder 3.

(7) In a preferred embodiment, a bottom part of the pneumatic cylinder 3 is connected to a supporting base. The supporting base has four legs 11 separated from one another, and each of the four legs 11 is provided with an omnidirectional wheel 12.