CN107830383B

CN107830383B - Desktop support

Info

Publication number: CN107830383B
Application number: CN201711285900.5A
Authority: CN
Inventors: 常晓杰
Original assignee: KUNSHAN HONGJIE ELECTRONICS CO Ltd
Current assignee: KUNSHAN HONGJIE ELECTRONICS CO Ltd
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2024-02-02
Anticipated expiration: 2037-12-07
Also published as: CN107830383A

Abstract

The invention discloses a desktop bracket, which comprises a base, an arm mechanism and a device mounting device, wherein the base can be detachably and fixedly mounted on a desktop, the arm mechanism comprises an arm front connecting piece, an arm rear connecting piece, an upper support, a lower support adjusting device and an elastic supporting device, the arm rear connecting piece is mounted on the base, the device mounting device is mounted on the arm front connecting piece, the upper support, the arm rear connecting piece and the lower support are hinged one by one in sequence to form a parallelogram structure, the upper end and the lower end of the adjusting device are respectively hinged with the upper support and the lower support, the two ends of the elastic support device are respectively connected with the adjusting device and the upper support, and the length of the elastic support device can be elastically telescopic.

Description

Desktop support

Technical Field

The invention relates to a bracket, in particular to a desktop bracket.

Background

The support for electronic equipment installation, like display support, TV set support, projecting apparatus support etc, at present many electronic equipment passes through the installing support to be installed on workstation such as desktop, be convenient for the staff to operate the electronic equipment on the support, common desktop support electronic product altitude mixture control is all through arm up-and-down swing regulation or be connected with the stand through the mode that the gasket pressed from both sides tightly through the sliding sleeve, adjust inconveniently, stability is poor, through the mode of arm swing regulation, its general adjustment mechanism is the bolt of installing on the base, drive the nut of spiro union with it through the bolt rotation and go up and down, and then change the triangle-shaped side length and the contained angle that bolt, elastic component and swing arm one side formed, realize the stable location of different height, this kind of adjustment mechanism bearing scope is little, weighing scope is generally 2-9kg, can rise automatically when having electronic equipment to hang, need consume great effort when adjusting, adjust inequality.

Disclosure of Invention

In order to make up for the defects, the invention provides the desktop bracket, which can realize stable adjustment of various states of electronic equipment, is convenient to operate and is flexible to adjust.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a desktop support, includes base, arm mechanism and equipment installation device, the fixed mounting that the base can be dismantled is on the desktop, and arm mechanism includes connecting piece before the arm, arm back connecting piece, goes up support, lower support adjusting device and elastic supporting device, connecting piece installs on the base after the arm, and equipment installation device installs on connecting piece before the arm, and connecting piece before the arm, go up support, connecting piece after the arm and lower support are articulated one by one and are formed parallelogram structure, and adjusting device upper and lower both ends link to each other with last support and lower support hinge respectively, and elastic supporting device both ends link to each other with adjusting device and last support respectively, elastic supporting device length can elastic expansion.

As a further improvement of the invention, the adjusting device comprises a bracket, a sliding block and an adjusting bolt, wherein the upper end and the lower end of the bracket are respectively hinged with an upper arm and a lower arm, the bracket is arranged in parallel with the arm rear connecting piece and the arm front connecting piece, the sliding block can be movably positioned on the bracket along the extending direction of the bracket, the adjusting bolt can be rotationally positioned on the bracket along the axial stop circumferential direction of the adjusting bolt, the adjusting bolt is in threaded connection with the sliding block, and the upper arm is provided with a hollowed-out part opposite to the head position of the adjusting bolt.

As a further improvement of the invention, the equipment installation device comprises a stand column, a swivel, an expansion device and a driving mechanism, wherein the stand column is installed on the front connecting piece of the arm, a longitudinal slideway is arranged on the stand column, one side wall of the longitudinal slideway forms at least one opening structure, the expansion device can be slidably inserted into the longitudinal slideway of the stand column, the expansion device is provided with a lug which extends out of the stand column along the opening structure on the side wall of the longitudinal slideway of the stand column, the lug can be fixedly connected with the swivel, the swivel is provided with an installation structure for installing a display, and the driving mechanism drives the expansion device to radially expand to abut against the inner side wall of the longitudinal slideway in the stand column.

As a further improvement of the invention, the expansion device comprises an expansion sleeve and an expansion block, wherein the expansion sleeve can be slidably inserted into an axial slideway in the upright post, the convex block is fixedly arranged on the outer side wall of the expansion sleeve, a conical hole is formed in the inner side of the expansion sleeve, the expansion block is a conical body capable of axially sliding along the expansion sleeve, the outer diameter of one end of the expansion block with a larger diameter is larger than the inner diameter of one end of the expansion sleeve with a smaller diameter, and the driving mechanism drives the expansion block to axially move along the expansion sleeve.

As a further improvement of the invention, the outer side wall of the expansion block and the inner side wall of the expansion sleeve are respectively provided with a thread structure capable of being meshed with each other, the driving mechanism is an adjusting rod which is stopped in the circumferential direction of the expansion block and can be axially and slidably positioned, the adjusting rod is stopped in the axial direction and can be rotatably arranged on the upright post in the circumferential direction, and the upper end of the adjusting rod just can extend out of the outer side of the upper end of the upright post to form an operation end.

As a further improvement of the invention, the swivel comprises a sliding plate, a swivel shell and an elastic piece, wherein at least one slide way extending along the longitudinal direction is arranged on the outer side wall of the upright post, at least one insert piece is formed on the sliding plate, each insert piece can be inserted into each slide way on the side wall of the upright post in a corresponding sliding way, a lug on the expanding device can be fixedly connected with the sliding plate, the sliding plate is hinged with the swivel plate in a rotating way around a horizontal shaft, a gasket structure tightly clamped between the hinging overlapping positions of the sliding plate and the swivel plate is formed on the swivel shell, two ends of the elastic piece in the stretching direction are respectively connected with the side walls opposite to the sliding plate and the swivel plate, and the elastic piece provides reverse elastic moment for the swivel plate for overcoming the gravity moment on the elastic piece.

As a further improvement of the invention, the opposite sides of the sliding plate and the rotating plate are both formed into U-shaped structures, the side walls of the two U-shaped structures are hinged and connected through the connecting piece, the rotating head shell is of a long column-shaped structure, the inside of the rotating head shell is provided with a shaft hole for the connecting piece to pass through, the circumference outer side walls of the two ends of the rotating head shell are respectively provided with two open gaps with a circular shape at intervals, the opening directions of the two adjacent open gaps are opposite to the side wall of the rotating plate and the side wall of the sliding plate respectively, the sliding plate and the side wall of the rotating plate are correspondingly inserted into the open gaps adjacent to the two ends of the rotating head shell respectively, and a gasket structure is formed between the adjacent open gaps at the two ends of the rotating head shell.

As a further improvement of the invention, the invention is also provided with a tray, an extension piece and a clamping piece, wherein the tray is provided with a slideway extending along the front-rear direction of the tray based on the actual use direction, one end of the extension piece can be connected with the upright post, the other end of the extension piece can be inserted into the slideway of the tray in a sliding way, the surface of the extension piece or the inner side wall of the slideway of the tray is provided with a plurality of first buckles, the clamping piece is arranged on the tray or the extension piece in a stopping way along the extending direction of the slideway, the clamping piece is provided with a second buckle, and the second buckle can be buckled and connected with any one of the first buckles.

As a further improvement of the invention, the first buckle is of a rack structure, the second buckle is of a latch capable of being meshed with any tooth slot of the rack structure, a through hole perpendicular to the surface direction of the latch is formed in the tray, the through hole is just communicated with the inner side of a slideway on the tray, the clamping piece can slide and position axially along the through hole on the tray, the first buckle is fixedly arranged on the extending piece, an elastic body is further arranged, two ends of the elastic body are fixedly positioned with the clamping piece and the tray respectively, and the elastic body always provides elastic retaining force for the clamping piece to move towards the rack direction.

As a further improvement of the invention, the invention is also provided with a fixing seat, a tray connecting piece and a braking mechanism, wherein one end of the fixing seat can be fixedly arranged on the upright post, the other end of the fixing seat forms an inclined plane with an acute angle with the horizontal plane, one end of the connecting piece can be arranged on the side wall of the other end of the fixing seat in a rotating way around a rotating shaft perpendicular to the inclined plane of the other end of the fixing seat by a set angle, the braking mechanism can fixedly position the other end of the fixing seat and the tray connecting piece, and the extending piece is fixedly arranged on the connecting piece.

The beneficial technical effects of the invention are as follows: the arm mechanism of the invention respectively articulates the upper end and the lower end of the adjusting device with the upper support and the lower support, so that the upper support and the lower support jointly form the support of the adjusting device, the support strength is high, the adjusting device can bear larger weight, simultaneously, the adjusting device automatically adjusts the position along with the swinging of the upper support and the lower support, the fulcrum position of the elastic supporting device is changed, the stress balance is automatically achieved, the torque born by the adjusting device is avoided, the adjusting device is labor-saving and smooth in adjusting, the bracket can maintain a stable position state when any weight of electronic equipment is installed due to the formation of a self-balancing system, and can also maintain a stable state without lifting when no electronic equipment is installed, the weight range of hanging electronic equipment is enlarged, the electronic equipment mounting device is positioned through the expansion device formed by the conical expansion sleeve and the expansion block on the upright post, the positioning in a gasket clamping mode is avoided, the stable position of the rotating head can be kept on the upright post without sliding down after positioning, wear failure can not occur even after long-term use, the rotating plate for adjusting the pitching angle of the electronic equipment on the rotating head is elastically supported by the elastic piece after adjustment, the phenomenon of low head caused by the weight of the display can be effectively avoided, the supporting equipment is placed by arranging the tray capable of stretching on the upright post, the horizontal fine adjustment is realized through the swinging of the tray on the inclined surface, the horizontal state is ensured, and the electronic equipment is more comfortable to use.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 4 is a left side view of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is an exploded view of the swivel of the present invention;

FIG. 7 is a front view of a swivel of the invention;

FIG. 8 is a cross-sectional view taken along B-B in FIG. 7;

FIG. 9 is an exploded view of the tray of the present invention;

FIG. 10 is a front view of the tray of the present invention;

FIG. 11 is a sectional view taken along the direction D-D in FIG. 10;

FIG. 12 is an exploded view of the horizontal trimming structure of the pallet of the present invention;

fig. 13 is a perspective view of an adjustment device of the present invention.

Detailed Description

Examples: the utility model provides a desktop support 28, includes base 1, arm mechanism and equipment installation device, the fixed mounting that base 1 can dismantle is on the desktop, and arm mechanism includes that connecting piece 23, arm back connecting piece 24, goes up support 25, lower support 26, adjusting device and elastic support device 27 behind the arm, connecting piece 24 are installed on base 1 behind the arm, and equipment installation device installs on connecting piece 23 before the arm, and connecting piece 23, last support 25, connecting piece 24 behind the arm and lower support 26 are articulated one by one in proper order to form parallelogram structure, and adjusting device upper and lower both ends link to each other with last support 25 and lower support 26 are articulated respectively, and elastic support device 27 both ends link to each other with adjusting device and last support 25 respectively, elastic support device 27 length can elastic expansion.

When in use, the base 1 is arranged on a desktop, the electronic equipment is arranged on the equipment installation device, the arm rear connecting piece 24 can be fixedly arranged on the base 1, the electronic equipment can also be axially and rotationally fixed on the base 1, the base 1 can be arranged on the desktop by adopting connecting pieces such as screws, the electronic equipment can also be arranged on the desktop in a clamping mode, the equipment installation device can be fixedly arranged on the arm front connecting piece 23, the electronic equipment can also be axially and rotationally fixed on the arm front connecting piece 23, wherein the arm front connecting piece 23, the upper support 25, the arm rear connecting piece 24 and the lower support 26 form a parallelogram structure (the parallelogram structure ensures that the movement angles of the front and rear connecting pieces are consistent), the arm rear connecting piece 24 forms an integral fixed support and swings in parallel through the upper support 25 and the lower support 26, the lifting of the arm front connecting piece 23 is realized, the position of the front arm connecting piece is supported and positioned by the elastic force of the elastic supporting device 27, the elastic supporting device 27 swings together with the upper supporting device 25 and the lower supporting device 26 in the swinging process and changes the length, a stable triangle supporting structure is always formed by the elastic supporting device 27, the supporting point of the elastic supporting device 27 is the hinging point of the elastic supporting device and the adjusting device, the supporting point changes along with the swinging of the upper supporting device and the lower supporting device 26, the borne moment changes along with the swinging of the upper supporting device and the lower supporting device, the balance is formed by the elastic force generated by elastic expansion and contraction along with the swinging of the elastic supporting device 27, the whole supporting structure can automatically change the supporting point to form balance, no matter the front arm connecting piece is provided with a plurality of weight articles, the position of the supporting point can be automatically adjusted to reach balance, the bearing weight range is large, meanwhile, the upper end and the lower end of the adjusting device are respectively connected with the upper support 25 and the lower support 26 to transmit stress to the upper support 25 and the lower support 26, the upper support 25 and the lower support 26 jointly form a support, and the adjusting device breaks down the moment born on the upper support 25 and the lower support 26 to not bear the torsion moment, so that the adjusting device only plays a role in adjusting the length of the elastic support device 27, does not bear the moment, and is not easy to damage.

The adjusting device comprises a support 28, a sliding block 29 and an adjusting bolt 30, wherein the upper end and the lower end of the support 28 are respectively hinged with an upper arm and a lower arm, the support 28 is parallel to an arm rear connecting piece 24 and an arm front connecting piece 23, the sliding block 29 can be positioned on the support 28 along the extending direction of the support 28, the adjusting bolt 30 can be rotationally positioned on the support 28 along the axial stop circumferential direction, the adjusting bolt 30 is in threaded connection with the sliding block 29, a hollowed-out part opposite to the head position of the adjusting bolt 30 is arranged on the upper arm, the sliding block 29 slides on the support 28 through rotating the adjusting bolt 30, the hinge point distance between the adjusting device and the elastic supporting device 27 and the hinge point between the adjusting device and the upper arm is changed, the length of one fixed edge of the supporting triangle is further changed, the stretching amount of the elastic supporting device 27 is further changed when the upper arm and the lower arm swing a set angle is further changed, namely the supporting force is changed, the supporting force is further adapted to stable supporting of electronic equipment with different weights, and the position of the supporting point is automatically balanced along with the change when the upper arm and the lower arm swing angle is different, and the adjusting bolt 30 is used for adjusting the weight of the sliding block 29 only automatically, so that the user can easily and easily rotate.

The device comprises a stand column 2, a swivel, an expansion device and a driving mechanism, wherein the stand column 2 is arranged on an arm front connecting piece 23, a longitudinal slideway is arranged on the stand column 2, one side wall of the longitudinal slideway forms at least one opening structure, the expansion device can be slidably inserted into the longitudinal slideway of the stand column 2, a bump 3 is arranged on the expansion device, the bump 3 extends out of the stand column 2 along the opening structure on the side wall of the longitudinal slideway of the stand column 2, the bump 3 can be fixedly connected with the swivel, the swivel is provided with a mounting structure for mounting a display, the driving mechanism drives the expansion device to radially expand and tightly lean against the inner side wall of the longitudinal slideway in the stand column 2, when the device is used, the base 1 is arranged on a table top, the display is arranged on the swivel, the driving mechanism drives the tensioning mechanism to expand, the outer side wall of the expansion device tightly lean against the inner side wall of the axial slideway in the stand column 2 to form a huge friction force, and the expansion device and the stand column 2 are fixedly positioned at the moment, so that the fixed positioning of the height of the display is realized.

The expansion device comprises an expansion sleeve 4 and an expansion block 5, the expansion sleeve 4 can be inserted into an axial slideway in a stand column 2 in a sliding manner, a lug 3 is fixedly arranged on the outer side wall of the expansion sleeve 4, a conical hole is formed in the inner side of the expansion sleeve 4, the expansion block 5 is a conical body capable of axially sliding along the expansion sleeve 4, the outer diameter of one end with the large diameter of the expansion block 5 is larger than the inner diameter of one end with the small inner diameter of the expansion sleeve 4, the expansion block 5 is driven to axially move along the expansion sleeve 4 by a driving mechanism, the expansion block 5 is driven to axially move along the expansion sleeve 4 by the driving mechanism, the expansion sleeve 4 is opened by a conical surface, the outer side of the expansion block is expanded by the expansion block, the structure is convenient to operate, the expansion sleeve 4 is stable in state, the expansion sleeve 4 can adopt an elastic structure with an opening seam along the direction of a bus, two semi-circular rings are spliced to form a structure, the splicing seam can be a straight line, the convex curved seam or a folding line seam, the lug 3 can be respectively positioned on the two semi-circular rings, the whole lug 3 is formed after the splicing, in addition, the expansion block can be made into the expansion block can be radially expanded by the expansion sleeve 29 by the driving mechanism, the expansion device can be arranged in the side wall of the stand column 2 or the expansion sleeve can be easily replaced by the expansion device, and the expansion device can be easily and can be arranged in the radial slide block can be easily by a sliding device to be arranged in the stand column 2 by a sliding device, and can be easily, and the expansion device can be easily replaced by a sliding device by a positioning device can be easily by a positioning device by a person or a person by a person.

The outer side wall of the expansion block 5 and the inner side wall of the expansion sleeve 4 are respectively provided with a threaded structure capable of being meshed with each other, the driving mechanism is an adjusting rod 6 which is stopped in the circumferential direction of the expansion block 5 and can be axially and slidably positioned, the adjusting rod 6 is axially stopped and can be rotatably arranged on the upright post 2 in the circumferential direction, the upper end of the adjusting rod 6 just can extend out of the outer side of the upper end of the upright post 2 to form an operation end, the adjusting rod 6 is rotated to drive the expansion block 5 to slide relatively with the expansion sleeve 4 along the axial direction, the expansion sleeve 4 is expanded, the function of expanding the expansion sleeve 4 is realized, the fixed positioning of the expansion block 5 and the expansion sleeve 4 can be realized while the expansion block 5 and the expansion sleeve 4 are axially moved by the threaded meshing structure, the structure is simple in structure and convenient to realize, the relative position of the expansion block 29 is stable, and the driving can be realized by means of sliding the sliding structure of a sliding block 29 through cylinder pushing and pulling or a gear rack mechanism.

The turner comprises a slide plate 7, a turner plate 8, a turner shell 9 and an elastic piece 10, wherein at least one slide way extending along the longitudinal direction is arranged on the outer side wall of the upright post 2, at least one insert piece 11 is formed on the slide plate 7, each insert piece 11 can be inserted into each slide way on the side wall of the upright post 2 in a corresponding sliding way, a lug 3 on the expanding device can be fixedly connected with the slide plate 7, the slide plate 7 can be hinged with the turner plate 8 around a horizontal shaft in a rotating way, a gasket structure tightly clamped between the hinged overlapped positions of the slide plate 7 and the turner plate 8 is formed on the turner shell 9, two ends of the elastic piece 10 in the stretching direction are respectively connected with the opposite side walls of the slide plate 7 and the turner plate 8, the elastic component 10 provides the reverse elastic moment of overcoming the gravity moment on it for the rotating plate 8, during the use, install the slide 7 on stand 2, install electronic equipment on the rotating plate 8, the rotating plate 8 can rotate certain angle around the articulated shaft with slide 7 and realize display every single move angle regulatory function, the elastic component 10 overcomes the moment that the display dead weight produced through elastic force, avoid causing the low head phenomenon of display for the display keeps in the every single move angle state of adjusting, the elastic component 10 can be the pressure spring, also can be the extension spring, elastic component 10 one end can with turn round the fixed positioning of shell 9, the other end and turn round the fixed positioning of plate 8, turn round the fixed positioning of shell 9 through the tight structure realization with slide 7.

The utility model provides a slip sheet, including slip sheet 7, slip sheet 8, slip sheet 9, slip sheet 7 and slip sheet 8, the lateral wall of two U-shaped structures is articulated to be linked together through connecting piece (rivet or bolt), slip sheet 9 is long column structure, be formed with the shaft hole 12 that supplies the connecting piece to wear to establish in it, be formed with two open slot 13 of hypocircular on the circumference lateral wall at slip sheet 9 both ends respectively at the interval, adjacent two open slot 13 opening direction are just right with slip sheet 8 lateral wall and slip sheet 7 lateral wall respectively, slip sheet 7 and slip sheet 8 lateral wall correspond respectively and insert respectively in the open slot 13 adjacent with slip sheet 9 both ends, form the gasket structure between the open slot 13 adjacent at slip sheet 7 and slip sheet 8 lateral wall through slip sheet 9 upper opening slot 13, be used for hold slip sheet 7 and slip sheet 8 lateral wall, form the gasket structure between slip sheet 7 and the slip sheet 8 lateral wall through part between adjacent two open slot 13, the support between slip sheet 7 and the slip sheet 8 lateral wall is unnecessary, a plurality of installation cost is saved in the slip sheet 7 and slip sheet 8 lateral wall is easy to the installation, the easy to install, the multiple, the difficult and the appearance is hidden in the slip sheet 8 lateral wall is difficult to be hidden in the appearance, the appearance is easy, the easy to adjust the appearance, the appearance is easy, the size is easy, the easy to be difficult to adjust, the side is easy, the easy to be easy to install, the and has the appearance.

The tray 14 is further provided with a tray 14, an extension piece 15 and a clamping piece 18, the tray 14 is provided with a slide rail extending along the front-back direction of the tray 14 based on the actual use direction, one end of the extension piece 15 can be connected with the upright post 2, the other end of the extension piece 15 can be inserted into the slide rail of the tray 14 in a sliding manner, a plurality of first buckles 16 are arranged on the surface of the extension piece 15 or the inner side wall of the slide rail of the tray 14, the clamping piece 18 is arranged on the tray 14 or the extension piece 15 in a locking manner along the extending direction of the slide rail, the clamping piece 18 is provided with a second buckle 17, the second buckle 17 can be buckled and connected with any one of the first buckles 16, the bracket 28 is used in the process of adjusting the front-back position of the tray 14, the tray 14 can be conveniently adjusted by pushing and pulling the tray 14, the tray 14 can be slid in the slide rail of the tray 14, the front-back position adjustment of the tray 14 is further realized, the stacked buckles on the operation buckle 18 are buckled and the first buckles 16, the tray 14 can be fixedly positioned with the extension piece 15 along the extending direction, namely, the position of the tray 14 is conveniently adjusted, and the front position of the tray 14 is conveniently used by a worker.

The first buckle 16 is of a rack structure, the second buckle 17 is a latch capable of being meshed with any tooth slot of the rack structure, the tray 14 is provided with a through hole perpendicular to the surface direction of the latch, the through hole is just communicated with the inner side of a slideway on the tray 14, the clamping piece 18 can slide and position along the axial direction of the through hole on the tray 14, the first buckle 16 is fixedly arranged on the extension piece 15, an elastic body 19 is further provided, two ends of the elastic body 19 are respectively fixedly positioned with the clamping piece 18 and the tray 14, the elastic body 19 always provides elastic retaining force for the clamping piece 18 to move towards the rack direction, the buckling connection of the first buckle and the second buckle is realized through the meshing of the rack and the latch, the latch on the clamping piece 18 always stretches into the tooth slot of the rack on the extension piece 15 through the elastic force of the elastic body 19, besides the elastic piece 10, the structures such as a bolt, a jacking block and the like can also be adopted, in addition, the buckling connection structure of the first buckle and the second buckle can also be a gear and rack meshing connection structure, or the C and a spherical buckling connection structure, or a structure and the like, and the like are easy to replace according to the equivalent structures of the technology in the field.

Still be equipped with fixing base 20, tray connecting piece 21 and brake mechanism 22, fixing base 20 one end can fixed mounting on stand 2, and the fixing base 20 other end forms the inclined plane that exists the acute angle contained angle with the horizontal plane, and connecting piece one end can rotate the installation on fixing base 20 other end lateral wall of settlement angle around the pivot of perpendicular fixing base 20 other end inclined plane, and brake mechanism 22 can be with fixing base 20 other end and tray connecting piece 21 fixed position, extension piece 15 fixed mounting is on the connecting piece, through adjusting tray connecting piece 21 rotation about on the fixing base 20 inclined plane, realizes tray 14 and swings about the horizontal axis and then make its left and right sides high change, makes it keep the level, and this simple structure is convenient to adjust.

Claims

1. A desktop stand, characterized by: the device comprises a base (1), an arm mechanism and an equipment installation device, wherein the base can be detached and fixedly installed on a tabletop, the arm mechanism comprises an arm front connecting piece (23), an arm rear connecting piece (24), an upper support (25), a lower support (26) adjusting device and an elastic support device (27), the arm rear connecting piece is installed on the base, the equipment installation device is installed on the arm front connecting piece, the upper support, the arm rear connecting piece and the lower support are hinged in sequence one by one to form a parallelogram structure, the upper end and the lower end of the adjusting device are respectively hinged with the upper support and the lower support, the two ends of the elastic support device are respectively connected with the adjusting device and the upper support, the length of the elastic support device can be elastically stretched, the equipment installation device comprises a stand column (2), a rotating head, an expansion device and a driving mechanism, the stand column is installed on the arm front connecting piece, a longitudinal slide way is arranged on the stand column, one side wall of the longitudinal slide way forms at least one opening structure, the expansion device can be inserted into the longitudinal slide way of the stand column, a lug (3) is arranged on the expansion device, the lug extends out of the longitudinal side wall of the stand column, the opening structure extends out of the stand column, the expansion device can be arranged on the inner side wall of the expansion device and forms an expansion sleeve (5) and is arranged in a conical expansion sleeve, the expansion sleeve is arranged in the expansion sleeve, and the expansion sleeve is arranged in the expansion sleeve is in the expansion sleeve, and the expansion sleeve is in the expansion sleeve is arranged. The expansion block is a conical body capable of sliding along the axial direction of the expansion sleeve, the outer diameter of one end with the large diameter of the expansion block is larger than the inner diameter of one end with the small diameter of the expansion sleeve, the expansion block is driven by the driving mechanism to move along the axial direction of the expansion sleeve, threaded structures capable of being meshed with each other are respectively arranged on the outer side wall of the expansion block and the inner side wall of the expansion sleeve, the driving mechanism is an adjusting rod (6) capable of being stopped in the circumferential direction of the expansion block and positioned in a sliding mode in the axial direction, the adjusting rod is mounted on the upright in a rotating mode in the circumferential direction, and the upper end of the adjusting rod just can extend out of the outer side of the upper end of the upright to form an operation end.

2. A desktop stand according to claim 1, characterized in that: the adjusting device comprises a support (28), a sliding block (29) and an adjusting bolt (30), wherein the upper end and the lower end of the support are respectively hinged with an upper arm and a lower arm, the support is parallel to a rear arm connecting piece and a front arm connecting piece, the sliding block can be positioned on the support in a moving mode along the extending direction of the support, the adjusting bolt can be rotationally positioned on the support in the axial stopping circumferential direction, the adjusting bolt is in threaded connection with the sliding block, and a hollowed-out part opposite to the head position of the adjusting bolt is arranged on the upper arm.

3. A desktop stand according to claim 1, characterized in that: the rotary head comprises a sliding plate (7), a rotary plate (8), a rotary head shell (9) and an elastic piece (10), wherein at least one slide way extending longitudinally is arranged on the outer side wall of the upright post, at least one inserting piece (11) is formed on the sliding plate, the corresponding sliding of each inserting piece is inserted into each slide way on the side wall of the upright post, a lug on the expanding device can be fixedly connected with the sliding plate, the sliding plate can be hinged with the rotary plate around a horizontal shaft, a gasket structure tightly clamped between the sliding plate and the hinged overlapping position of the rotary plate is formed on the rotary head shell, two ends of the stretching direction of the elastic piece are respectively connected with the side walls opposite to the sliding plate and the rotary plate, and the elastic piece provides reverse elastic moment for the rotary plate to overcome the gravity moment on the elastic piece.

4. A desktop stand according to claim 3, characterized in that: the sliding plate and the opposite sides of the rotating plate all form a U-shaped structure, the side walls of the two U-shaped structures are hinged and connected through the connecting piece, the rotating head shell is of a long column-shaped structure, shaft holes (12) for the connecting piece to penetrate are formed in the rotating head shell, two open gaps (13) with a circular shape are formed in the outer side walls of the circumferences of the two ends of the rotating head shell at intervals respectively, the open directions of the two adjacent open gaps with a circular shape are opposite to the side walls of the rotating plate and the side walls of the sliding plate respectively, the sliding plate and the side walls of the rotating plate are correspondingly inserted into the open gaps adjacent to the two ends of the rotating head shell respectively, and a gasket structure is formed between the open gaps adjacent to the two ends of the rotating head shell.

5. A desktop stand according to claim 1, characterized in that: the novel multifunctional tray is characterized by further comprising a tray (14), an extension piece (15) and a clamping piece (18), wherein the tray is provided with a slide rail extending along the front-rear direction of the tray according to the actual use direction, one end of the extension piece can be connected with the upright post, the other end of the extension piece can be slidably inserted into the slide rail of the tray, a plurality of first buckles (16) are arranged on the surface of the extension piece or the inner side wall of the slide rail of the tray, the clamping piece is mounted on the tray or the extension piece in a mode of stopping along the extending direction of the slide rail, a second buckle (17) is arranged on the clamping piece, and the second buckle can be buckled and connected with any one of the first buckles.

6. The desktop stand of claim 5, wherein: the first buckle is of a rack structure, the second buckle is a latch capable of being meshed with any tooth slot of the rack structure, a perforation perpendicular to the surface direction of the latch is formed in the tray, the perforation is communicated with the inner side of a slideway on the tray, the clamping piece can slide and position along the perforation axial direction on the tray, the first buckle is fixedly mounted on the extending piece, an elastic body (19) is further arranged, two ends of the elastic body are fixedly positioned with the clamping piece and the tray respectively, and the elastic body always provides elastic retaining force for the clamping piece to move towards the rack direction.

7. The desktop stand of claim 5, wherein: still be equipped with fixing base (20), tray connecting piece (21) and brake mechanism (22), fixing base one end can fixed mounting on the stand, and the fixing base other end forms the inclined plane that exists acute angle contained angle with the horizontal plane, and connecting piece one end can rotate around the pivot of perpendicular fixing base other end inclined plane and set for the angle and install on fixing base other end lateral wall, and brake mechanism can be with fixing base other end and tray connecting piece fixed position, extension fixed mounting is on the connecting piece.