CN212878258U

CN212878258U - Mechanical arm type portable multifunctional bed computer desk for students in dormitories

Info

Publication number: CN212878258U
Application number: CN202021418445.9U
Authority: CN
Inventors: 马文俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-04-06
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a mechanical arm type portable multifunctional computer desk on bed in student dormitory, which comprises a desktop, a desktop mounting rack, a first support rod, a second support rod, a third support rod, a fourth support rod and a fifth support rod, wherein the desktop is rotationally connected with the desktop mounting rack, and the other end of the first support rod is hinged with one end of the second support rod through a second rotary joint; the other end of the second supporting rod is hinged with one end of the third supporting rod through a second locking piece; the other end of the third supporting rod is hinged with one end of the fourth supporting rod through a first rotary joint; the other end of the fourth supporting rod is hinged with one end of the fifth supporting rod through a right-angle hinge; a second clamping groove and a first clamping groove are respectively and fixedly formed in the two ends of one side, which is not connected with the right-angle folding leaf, of the fifth supporting rod; the utility model has the advantages of reasonable design, can realize the diversified user demand of desktop multi-angle, can also regard as the stool and assemble into the desk and use, satisfied the user demand of dormitory greatly.

Description

Mechanical arm type portable multifunctional bed computer desk for students in dormitories

Technical Field

The utility model relates to a computer desk, in particular to a mechanical arm type portable multifunctional computer desk on bed in student dormitory.

Background

In all colleges and universities throughout the country, most of the student dormitories are generally small in space, the student dormitories of most of the schools are four-person dormitories, and even the student dormitories of some schools are six-person dormitories and eight-person dormitories. At present, dormitories of colleges and universities adopt equipment of going to bed and going to table, and the available indoor space after the dormitories of colleges and universities are more elbow-catching. The university students have fewer courses, except for the time of class, a certain part of life and study are carried out in the dormitory, the dormitory also becomes the second family of the contemporary university students, and as the students need to live in the school for four years, a lot of articles are placed in the dormitory, so that the students can live in the dormitory more comfortably and happily, and the students pay attention to and are concerned by the contemporary students. The desk in the student dormitory is generally provided with the bookshelf, but due to the limited space, the bookshelf on the desk cannot meet the requirement of placing space of books in the course of four years, and some books need to be placed on the desk. When the desktop is full of books, the computer can not be placed; the computer is not convenient to write when being placed on the desktop. Schools in most middle and north areas have no warm air, and the students generally choose to study in bed in cold weather in winter. At present, the bed of a student dormitory is narrow, and students are inconvenient to use computers to study comfortably in the bed.

The existing computer desk for the dormitory is troublesome to mount and dismount, too heavy in weight, and most of the computer desks are bulk parts when being purchased, so that the computer desk needs to be mounted by self, and the computer desk is inconvenient to mount and use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable multi-functional student dormitory bed desk of arm-type to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a mechanical arm type portable multifunctional computer desk on a bed in a student dormitory comprises a desktop, a desktop mounting frame, a first supporting rod, a second supporting rod, a third supporting rod, a fourth supporting rod and a fifth supporting rod, wherein the middle position of the lower end face of the desktop is connected with the top end of the desktop mounting frame; the bottom end of the rotary fixed block is fixedly connected with the top end of the rotary fixed rod; the desktop mounting rack is made of stainless steel; the bottom end of the rotary fixing rod is a flat extension section, and the extension section is hinged with one end of the first supporting rod through a first locking piece; the other end of the first supporting rod is hinged with one end of a second supporting rod through a second rotary joint, the second rotary joint is fixed through a supporting rod connecting fixing pin, and the rotating angle between the first supporting rod and the second supporting rod ranges from 0 degree to 180 degrees; the other end of the second supporting rod is hinged with one end of the third supporting rod through a second locking piece, and the rotating angle between the second supporting rod and the third supporting rod ranges from 0 degree to 360 degrees; the other end of the third supporting rod is hinged with one end of the fourth supporting rod through a first rotary joint, the first rotary joint is fixed through a supporting rod connecting fixing pin, and the rotating angle between the third supporting rod and the fourth supporting rod ranges from 0 degree to 180 degrees; the other end of the fourth supporting rod is hinged with one end of the fifth supporting rod through a right-angle hinge, and the rotating angle between the fourth supporting rod and the fifth supporting rod ranges from 0 degree to 90 degrees; a second clamping groove and a first clamping groove are respectively and fixedly formed in two ends of one side, which is not connected with the right-angle folding leaf, of the fifth supporting rod; the second clamping groove and the first clamping groove are fixed on the bed edge through a fourth locking piece and a third locking piece.

As a further aspect of the present invention: the third locking piece consists of a locking knob, a locking nut, a screw and a fixed gasket, the locking knob is fixedly arranged at the bottom end of the screw, and the locking nut and the fixed gasket are sleeved on the screw and are in threaded connection with the screw; the first clamping groove is U-shaped, a threaded hole matched with the screw rod is formed in the middle of the bottom end of the first clamping groove, and the screw rod is connected with the threaded hole in a threaded mode.

As a further aspect of the present invention: the right-angle hinged hinge comprises a leaf A and a leaf B, the leaf A is welded at one end of the fourth supporting rod, and the leaf B is welded at one end of the fifth supporting rod; the outer side stop block is fixedly arranged at one end of the leaf A, the inner side stop block is fixedly arranged on the leaf B, round holes are formed in the outer side stop block and the inner side stop block, the outer side stop block and the inner side stop block are connected through a connecting pin, and the connecting pin is in interference fit with the round holes formed in the outer side stop block and the inner side stop block.

As a further aspect of the present invention: the second rotary joint comprises an arc-shaped guide rail and a fixed block, the arc-shaped guide rail is fixedly arranged on the second support rod, and an arc-shaped guide groove is formed in the arc-shaped guide rail; the fixed block is welded on the first supporting rod, the fixed block is fixedly connected with one end of the connecting rod, a sliding block is installed on the connecting rod, the sliding block penetrates through the guide groove, and a limiting nut is arranged on the extending part.

As a further aspect of the present invention: one end that first bracing piece and desktop mounting bracket are connected is provided with the protective sheath.

As a further aspect of the present invention: be provided with the abrasionproof and decrease the gasket on the first retaining member, the abrasionproof decreases the gasket and is located the both sides of the extension section of rotatory dead lever.

As a further aspect of the present invention: the desktop is provided with four jacks for the bottom, and the screw thread that matches with the screw rod head is seted up to the jack inside, and flexible pole setting passes through screw rod head and jack and assembles.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of reasonable design, the completion is just installed to the overwhelming majority part when dispatching from the factory, all can directly use in most use situation, need not to install again, and is very convenient. The utility model discloses a reasonable structural design can realize the diversified user demand of desktop multi-angle, can also regard as the stool and assemble into the desk and use, has satisfied the user demand of dormitory greatly.

Drawings

Fig. 1 is a schematic structural view of a mechanical arm type portable multifunctional computer desk on a student dormitory bed.

Fig. 2 is an enlarged schematic view of a structure in fig. 1.

Fig. 3 is an enlarged schematic view of the structure B in fig. 1.

Fig. 4 is an enlarged schematic view of the structure C in fig. 1.

Fig. 5 is an enlarged schematic view of the structure D in fig. 1.

Fig. 6 is a schematic structural view of a telescopic upright rod in a computer desk on a mechanical arm type portable multifunctional student dormitory bed.

In the figure: 1-tabletop, 2-jack, 3-second support bar, 4-second locking piece, 5-second slot, 6-fifth support bar, 7-first slot, 8-third locking piece, 81-locking knob, 82-locking nut, 83-screw, 84-fixing washer, 9-fourth locking piece, 10-right angle open hinge, 101-leaf A, 102-outer stop, 103-leaf B, 104-inner stop, 105-connecting pin, 11-fourth support bar, 12-first rotary joint, 13-third support bar, 14-second rotary joint, 141-arc guide rail, 142-guide groove, 143-fixing block, 144-connecting bar, 145-slider, 146-limiting nut, 15-first supporting rod, 151-protective sleeve, 16-anti-abrasion gasket, 17-table surface mounting rack, 171-rotary fixing rod, 172-rotary fixing block, 18-first locking piece, 19-supporting rod connecting fixing pin, 20-telescopic vertical rod, 201-rod body and 202-threaded rod head.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 6, a mechanical arm type portable multifunctional computer desk on a bed in a student dormitory comprises a desktop 1, a desktop mounting frame 17, a first support rod 15, a second support rod 3, a third support rod 13, a fourth support rod 11 and a fifth support rod 6, wherein the middle position of the lower end surface of the desktop 1 is connected with the top end of the desktop mounting frame 17, a rotary fixing block 172 is arranged at the top end of the desktop mounting frame 17, the rotary fixing block 172 is rotatably connected with the desktop 1, a bearing is arranged inside the rotary fixing block 172, a cylindrical connecting piece is fixedly arranged at the middle position of the lower end surface of the desktop 1, the cylindrical connecting piece is fixedly arranged in the bearing inside the rotary fixing block 172, and the desktop 1 can rotate at any angle in a plane above the rotary fixing block 172 and parallel to; the bottom end of the rotary fixing block 172 is fixedly connected with the top end of the rotary fixing rod 171, and the rotary fixing block 172 and the rotary fixing rod 171 can be welded parts or can be integrally formed by casting, so that the structure is firm and is not easy to damage; the desktop mounting rack 17 is made of stainless steel, is wear-resistant, has beautiful appearance and is not easy to corrode and rust; the bottom end of the rotating fixing rod 171 is a flat extension section, the extension section is hinged with one end of the first supporting rod 15 through the first locking piece 18, and the angle between the desktop mounting frame 17 and the first supporting rod 15 can be realized by adjusting the first locking piece 18, so that the position and the angle of the desktop 1 can be adjusted, the use is convenient, and different use requirements can be met; the desktop 1 can be further provided with a blocking strip (block), articles such as books or notebook computers can be conveniently placed on the desktop, a drawing keyboard tray can be further arranged inside the desktop 1, an external keyboard is convenient to use, and the desk can also be used for storing articles such as books. The other end of the first supporting rod 15 is hinged with one end of the second supporting rod 3 through a second rotary joint 14, the second rotary joint 14 is fixed through a supporting rod connecting fixing pin 19, the rotating angle range between the first supporting rod 15 and the second supporting rod 3 is 0-180 degrees, namely the first supporting rod 15 and the second supporting rod 3 can be completely folded together or completely unfolded, and the fixing pins 19 can be connected and fixed at any angle within the rotating angle range; the other end of the second supporting rod 3 is hinged with one end of the third supporting rod 13 through a second locking part 4, the angle range of rotation between the second supporting rod 3 and the third supporting rod 13 is 0-360 degrees, the second supporting rod can rotate freely in a vertical plane, and the second supporting rod is locked through the second locking part 4 and fixed at any angle; the other end of the third supporting rod 13 is hinged with one end of the fourth supporting rod 11 through a first rotary joint 12, the first rotary joint 12 is fixed through a supporting rod connecting fixing pin 19, the rotating angle range between the third supporting rod 13 and the fourth supporting rod 11 is 0-180 degrees, and the third supporting rod 13 and the fourth supporting rod 11 can be fixed at any angle through the supporting rod connecting fixing pin 19 within the rotating angle range; the other end of the fourth supporting rod 11 is hinged with one end of the fifth supporting rod 6 through a right-angle opening hinge 10, the rotation angle between the fourth supporting rod 11 and the fifth supporting rod 6 ranges from 0 degrees to 90 degrees, namely the fourth supporting rod 11 and the fifth supporting rod 6 can be completely folded together and also can be unfolded to mutually vertical positions; the fifth support rod 6 is not fixedly provided with a second clamping groove 5 and a first clamping groove 7 at two ends of one side connected with the right-angle opening hinge 10, the fifth support rod 6 can be clamped on a bed edge through the second clamping groove 5 and the first clamping groove 7, and then the fifth support rod is fixed through a fourth locking piece 9 and a third locking piece 8.

Furthermore, the third locking member 8 of the present invention is composed of a locking knob 81, a locking nut 82, a screw 83 and a fixing washer 84, wherein the locking knob 81 is fixedly disposed at the bottom end of the screw 83, and can be connected by a thread or an interference fit, and the locking nut 82 and the fixing washer 84 are both sleeved on the screw 83 and are connected with the screw 83 by a thread; the first clamping groove 7 is U-shaped, a threaded hole matched with the screw rod 83 is formed in the middle position of the bottom end of the first clamping groove 7, and the screw rod 83 is connected with the threaded hole through threads.

Furthermore, the right angle hinged hinge 10 of the present invention comprises a leaf a101 and a leaf B103, wherein the leaf a101 is welded at one end of the fourth support rod 11, and the leaf B103 is welded at one end of the fifth support rod 6; one end of the leaf A101 is fixedly provided with an outer side stop block 102, the leaf B103 is fixedly provided with an inner side stop block 104, the outer side stop block 102 and the inner side stop block 104 are provided with round holes, and the outer side stop block 102 and the inner side stop block 104 are connected through a connecting pin 105, so that the leaf A101 is hinged with the leaf B103; the connecting pin 105 is in interference fit with round holes formed on the outer side stop block 102 and the inner side stop block 104, or through holes can be formed at two ends of the connecting pin 105, and the connecting pin is fixed by using a bolt; the two ends of the connecting pin 105 can be knocked after the installation is finished, so that the diameters of the two ends are larger than the diameters of the round holes in the outer side stopper 102 and the inner side stopper 104, and the connecting pin can be prevented from falling off.

Further, the second rotary joint 14 of the present invention includes an arc-shaped guide rail 141 and a fixing block 143, the arc-shaped guide rail 141 is fixedly disposed on the second support rod 3, and an arc-shaped guide groove 142 is disposed inside the arc-shaped guide rail 141; the fixing block 143 is welded on the first support rod 15, the fixing block 143 is fixedly connected with one end of the connecting rod 144, the connecting rod 144 is provided with a sliding block 145, the sliding block 145 penetrates through the guide groove 142, a limit nut 146 is arranged on the extending part, and the extending end of the limit nut 146 and the sliding block 145 are connected through threads to prevent the sliding block 145 from slipping out of the guide groove 142.

Further, the one end that first bracing piece 15 is connected with desktop mounting bracket 17 is provided with protective sheath 151, and protective sheath 151 can adopt materials such as rubber, silica gel, PU, prevents that the hand from being the fish tail when adjusting the angle between first bracing piece 15 and the desktop mounting bracket 17, protects user's safety.

Further, be provided with the abrasionproof gasket 16 on the first retaining member 18, the abrasionproof gasket 16 is located the both sides of the extension section of rotatory dead lever 171, can effectively reduce the wearing and tearing of the extension section of rotatory dead lever 171, prolongs the life of equipment.

Further, the utility model discloses still be provided with flexible pole setting 20, flexible pole setting 20 includes the body of rod 201 and screw rod head 202, the body of rod 201 can adopt telescopic cell-phone from the same extending structure of rapping bar, also can adopt the same extending structure of telescopic fishing rod, can also adopt the extending structure of telescopic mop etc. and the body of rod 201 can adopt materials such as stainless steel, PP, ABS, can satisfy sturdy and durable, low in production cost can. Because the existing telescopic rod has a plurality of prior art structures which can be adopted, the details are not repeated. The screw head 202 is provided according to the telescopic structure actually adopted. The desktop 1 is provided with four jacks 2 for the bottom, and the screw thread of seting up with screw rod head 202 looks adaptation in jack 2 inside, and flexible pole setting 20 assembles through screw rod head 202 and jack 2. Through installing flexible pole setting 20 on desktop 1, can regard the desk as the stool to use, satisfy the partial user demand of dormitory. If a plurality of computer tables are arranged in a dormitory, the computer tables can be spliced together to be used as tables. The table top 1 can be adjusted to the same height as a dormitory table, thereby increasing the usable area of the table.

The utility model discloses well first retaining member 18, second retaining member 4, third retaining member 8 and fourth retaining member 9 structure are the same, the utility model discloses in adopt different serial numbers to distinguish only for convenient the description.

The utility model discloses well first revolute joint 12 is the same with second revolute joint 14 structure, the utility model discloses in adopt different serial numbers to distinguish only for convenient description.

The utility model discloses well first draw-in groove 7 is identical with 5 structures of second draw-in groove, the utility model discloses in adopt different serial numbers to distinguish only for convenient description.

The utility model discloses when using, block on the bed edge through second draw-in groove 5 and first draw-in groove 7, then fix through third retaining member 8 and fourth retaining member 9 to make fifth support bar 6 fix on the bed edge. Then, according to the use requirement, the fifth support rod 6 and the fourth support rod 11 are unfolded to be in a vertical state, then the limit nut 146 is unscrewed, and the third support rod 13 is screwed again after being adjusted to a proper position and angle; the second supporting rod 3 is adjusted to a proper position and angle by loosening the second locking piece 4 and then is screwed down; then, the limit nut 146 is loosened, and the first support rod 15 is adjusted to a proper position and angle and then screwed again; finally, the position and the angle of the desktop mounting frame are adjusted through the first locking piece 18, so that the position and the angle of the desktop 1 are adjusted, the desktop 1 rotates to a proper position according to actual needs to be used, and students can conveniently read and study on the bed in cold winter.

The utility model discloses can satisfy the draw-in groove no matter clip the object of any direction in three-dimensional space, all can open the hinge through adjusting support bar, rotary joint, right angle and guarantee that the desktop is located the horizontal plane to guarantee can normally use the desk. Through using flexible pole setting, promoted the bearing capacity of desktop greatly, can use this desk as the stool, realize the basic function of stool, make things convenient for the student to gather and use when discussing the study in a dormitory.

The utility model discloses except flexible pole setting all the other parts are all installed and are accomplished when dispatching from the factory, as long as the direct mount can use on the bed, need not extra installation work, and it is very convenient to use. According to actual needs, the desk can be fixed on the bed edge to be used as a computer desk, and can also be arranged beside a desk to be used as a desk, so that the use area of the desktop is increased. The computer desk can be used as a stool by installing the telescopic vertical rod. If a dormitory has a plurality of the computer tables of the utility model, can also be assembled together after being provided with the telescopic vertical rods, and can be used as a table, thereby being convenient for dining, studying and the like in the dormitory. When in use, the folding type clothes hanger is folded together, occupies a very small space, is convenient to place and saves indoor space. The utility model discloses a reasonable structural design can realize the diversified user demand of desktop multi-angle, can also regard as the stool and assemble into the desk and use, has satisfied the user demand of dormitory greatly.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a portable multi-functional students' dormitory bed desk of arm formula comprises desktop (1), desktop mounting bracket (17), first bracing piece (15), second bracing piece (3), third bracing piece (13), fourth bracing piece (11) and fifth bracing piece (6), its characterized in that: the middle position of the lower end face of the desktop (1) is connected with the top end of the desktop mounting frame (17), a rotary fixing block (172) is arranged at the top end of the desktop mounting frame (17), the rotary fixing block (172) is rotatably connected with the desktop (1), a bearing is arranged in the rotary fixing block (172), a cylindrical connecting piece is fixedly arranged at the middle position of the lower end face of the desktop (1), and the cylindrical connecting piece is fixedly arranged in the bearing in the rotary fixing block (172); the bottom end of the rotary fixed block (172) is fixedly connected with the top end of the rotary fixed rod (171); the desktop mounting rack (17) is made of stainless steel; the bottom end of the rotary fixing rod (171) is a flat extension section, and the extension section is hinged with one end of the first supporting rod (15) through a first locking piece (18); the other end of the first supporting rod (15) is hinged with one end of the second supporting rod (3) through a second rotary joint (14), the second rotary joint (14) is fixed through a supporting rod connecting fixing pin (19), and the rotating angle between the first supporting rod (15) and the second supporting rod (3) ranges from 0 degree to 180 degrees; the other end of the second supporting rod (3) is hinged with one end of the third supporting rod (13) through a second locking part (4), and the rotating angle between the second supporting rod (3) and the third supporting rod (13) ranges from 0 degree to 360 degrees; the other end of the third supporting rod (13) is hinged with one end of the fourth supporting rod (11) through a first rotary joint (12), the first rotary joint (12) is fixed through a supporting rod connecting fixing pin (19), and the rotating angle between the third supporting rod (13) and the fourth supporting rod (11) ranges from 0 degree to 180 degrees; the other end of the fourth supporting rod (11) is hinged with one end of the fifth supporting rod (6) through a right-angle hinge (10), and the rotating angle between the fourth supporting rod (11) and the fifth supporting rod (6) ranges from 0 degree to 90 degrees; a second clamping groove (5) and a first clamping groove (7) are respectively and fixedly arranged at two ends of one side of the fifth supporting rod (6) which is not connected with the right-angle hinge (10); the second clamping groove (5) and the first clamping groove (7) are fixed on the bed edge through a fourth locking piece (9) and a third locking piece (8).

2. The mechanical arm type portable multifunctional student dormitory bed computer desk of claim 1, wherein: the third locking piece (8) consists of a locking knob (81), a locking nut (82), a screw rod (83) and a fixing gasket (84), the locking knob (81) is fixedly arranged at the bottom end of the screw rod (83), and the locking nut (82) and the fixing gasket (84) are sleeved on the screw rod (83) and are in threaded connection with the screw rod (83); the first clamping groove (7) is U-shaped, a threaded hole matched with the screw rod (83) is formed in the middle of the bottom end of the first clamping groove (7), and the screw rod (83) is connected with the threaded hole through threads.

3. The mechanical arm type portable multifunctional student dormitory bed computer desk of claim 1, wherein: the right-angle hinged hinge (10) comprises a leaf A (101) and a leaf B (103), the leaf A (101) is welded at one end of the fourth support rod (11), and the leaf B (103) is welded at one end of the fifth support rod (6); an outer side stop block (102) is fixedly arranged at one end of the leaf A (101), an inner side stop block (104) is fixedly arranged on the leaf B (103), round holes are formed in the outer side stop block (102) and the inner side stop block (104), the outer side stop block (102) and the inner side stop block (104) are connected through a connecting pin (105), and the connecting pin (105) is in interference fit with the round holes formed in the outer side stop block (102) and the inner side stop block (104).

4. The mechanical arm type portable multifunctional student dormitory bed computer desk of claim 1, wherein: the second rotary joint (14) comprises an arc-shaped guide rail (141) and a fixed block (143), the arc-shaped guide rail (141) is fixedly arranged on the second support rod (3), and a circular guide groove (142) is formed in the arc-shaped guide rail (141); the fixing block (143) is welded on the first supporting rod (15), the fixing block (143) is fixedly connected with one end of a connecting rod (144), a sliding block (145) is installed on the connecting rod (144), the sliding block (145) penetrates through the guide groove (142), and a limiting nut (146) is arranged on the extending part.

5. The robotic portable multi-function student dormitory bed computer table of claim 4, wherein: one end of the first supporting rod (15) connected with the desktop mounting frame (17) is provided with a protective sleeve (151).

6. The mechanical arm type portable multifunctional student dormitory bed computer desk of claim 1, wherein: and the first locking piece (18) is provided with an anti-abrasion gasket (16), and the anti-abrasion gaskets (16) are positioned at two sides of the extension section of the rotary fixing rod (171).

7. The mechanical arm type portable multifunctional student dormitory bed computer desk of claim 1, wherein: the desktop (1) is provided with four jacks (2) for the bottom, the threads matched with the threaded rod head (202) are arranged in the jacks (2), and the telescopic vertical rod (20) is assembled with the jacks (2) through the threaded rod head (202).