CN111493513B

CN111493513B - Portable lifting type office table

Info

Publication number: CN111493513B
Application number: CN202010261004.0A
Authority: CN
Inventors: 韩叶飞
Original assignee: Changzhou Hanfa Vehicle Parts Co ltd
Current assignee: Changzhou Hanfa Vehicle Parts Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2022-06-28
Anticipated expiration: 2040-04-03
Also published as: CN111493513A

Abstract

The invention discloses a portable lifting type office table, which relates to the technical field of office tables and comprises a table body, wherein the table body comprises a base and a panel, a plurality of crossed lifting support rods are hinged between the base and the panel, lifting limit structures are arranged on the crossed lifting support rods and comprise limiting locking pieces and lifting pieces, the lifting pieces are slidably arranged in the limiting locking pieces in a penetrating mode, one back-facing ends of the limiting locking pieces and the lifting pieces are respectively connected with the base and the panel, first sliding grooves are formed in side wall surfaces of the limiting locking pieces, a plurality of first locking grooves communicated with the first sliding grooves are formed in one side wall of each first sliding groove, and limiting rods matched and connected with the first locking grooves are arranged at the end parts, extending into the limiting locking pieces, of the lifting pieces. The portable electric heating cooker solves the technical problems of high price and inconvenience in carrying, and has the effects of low use cost and convenience in carrying.

Description

Portable lifting type office table

Technical Field

The invention relates to the technical field of office tables, in particular to a portable lifting type office table.

Background

Desks are used where to handle work or jobs, and computers and other electronic products are the most used aids in work and jobs today.

The chinese utility model patent with publication number CN207721432U discloses a portable computer desk, which comprises a desk board; the lower surface of the table plate is symmetrically fixed with the two bearing plates along the axis through screws; a fixed block is arranged above the inner wall of the right side of the bearing plate; the transmission rod is a hexagonal prism, and a pressing plate is fixed on the right side of the transmission rod; a locking rod is arranged on the left side of the pressing plate; the locking block is fixed on the lower surface of the table plate and placed at the front end of the bearing plate, and a locking spring is fixedly connected inside the locking block; the sliding block is connected in the sliding groove in a sliding manner; the sliding chute is fixed inside the left side of the bearing plate and is placed behind the transmission rod; a second supporting inclined rod is connected below the transition connecting block through a connecting bolt; the front part of the second supporting diagonal rod is obliquely and crossly connected with the first supporting diagonal rod; the telescopic rod is connected into the cylinder; the upper part of the cylinder is connected to a second supporting inclined rod.

The above prior art solutions have the following drawbacks: although the panel can be adjusted to be lifted, the air cylinder is used as a driving part for lifting the panel, so that the use cost is high, and the air cylinder is inconvenient to carry and install.

Disclosure of Invention

According to the defects in the prior art, the invention aims to provide a portable lifting type office table which has the advantages of low use cost and portability.

The technical purpose of the invention is realized by the following technical scheme:

a portable lifting type office table comprises a table body, wherein the table body comprises a base and a panel, a plurality of crossed lifting support rods are hinged between the base and the panel, a lifting limiting structure is arranged on the plurality of crossed lifting support rods and comprises a limiting locking sheet and a lifting sheet, the lifting sheet is slidably arranged in the limiting locking sheet, one end, far away from the lifting sheet, of the limiting locking sheet is connected with one end, close to the base, of the crossed lifting support rods, one end, far away from the limiting locking sheet, of the lifting sheet is connected with one end, close to the panel, of the crossed lifting support rods, a first sliding groove is formed in the side wall surface of the limiting locking sheet, a plurality of first locking grooves communicated with the first sliding grooves are formed in one side wall of the first sliding groove, and limiting rods are arranged at the end parts, extending into the limiting locking sheets, of the lifting sheet, the limiting rod extends out of the first locking groove and is connected with the first locking groove in a matched mode.

Through adopting above-mentioned technical scheme, when needing to rise the table body, at first, with the base rigid, user's drive panel rises, thereby can be through the cross angle who changes between the lifting support pole that intersects, come the panel and go up and down, when the cross angle between the lifting support pole that intersects changes, the gag lever post can slide in first sliding tray, when reacing required height, block the gag lever post in first locking groove, can carry on spacingly with the gag lever post through first locking groove, thereby can make the panel can fix at required height. The first locking groove is provided with a plurality of locking grooves, so that multi-stage lifting can be realized, and the application range is enlarged. For the cylinder of comparison file, spacing piece and lift piece low price, portable to when the cylinder was used under high temperature, the incident appeared easily in easy production of heat.

The invention in a preferred example may be further configured to: every adjacent two all be formed with the partition post between the first locking groove, it is a plurality of the slope of partition post equidirectional sets up, and it is a plurality of the partition post orientation the lift piece is kept away from the direction slope of spacing stay, keeping away from of spacing stay the side of first sliding tray all seted up with a plurality of first sliding tray is with a plurality of second sliding trays that the specification set up, keeping away from of spacing stay the second locking groove that sets up with first locking tray with the specification is all seted up to the side of first sliding tray, stretch out from first locking groove and second locking groove respectively at the both ends of gag lever post.

Through adopting above-mentioned technical scheme, when producing relative motion between spacing locking plate and the lift piece, will separate the post slope setting, the gag lever post and first locking groove and second locking groove disconnection of being convenient for can, when reacing required height, push down the gag lever post, can lock the gag lever post in the first locking groove and the second locking inslot of required high position. First locking groove and second locking groove have been seted up respectively with the two sides of spacing locking sheet, carry out the joint through the first locking groove and the second locking groove of same height respectively with the both ends of gag lever post promptly to can make the panel highly fixed more reliably required.

The invention in a preferred example may be further configured to: the plurality of crossed lifting support rods comprise a pair of first support rods and a pair of second support rods, the first support rods are arranged in parallel, the second support rods are arranged in parallel, the first support rods and the second support rods are arranged in a crossed manner at the same side, the two ends of the two first support rods are respectively and rotatably connected with first connecting rods, the two ends of the two second support rods are respectively and rotatably connected with second connecting rods, the two ends of the first connecting rods and the two ends of the second connecting rods are respectively and rotatably connected with idler wheels, slide rails which are matched and connected with the idler wheels are respectively arranged on the base and the panel, a rotating rod is arranged at the crossed position of the first support rods and the second support rods, a third connecting rod is arranged at the position, close to the rotating rod, of the two first support rods and the second support rods, and the third connecting rod is arranged between the rotating rod and the panel, the end, far away from the lifting piece, of the limiting locking piece is rotatably connected with the first connecting rod, and the end, far away from the limiting locking piece, of the lifting piece is rotatably connected with the third connecting rod.

Through adopting above-mentioned technical scheme, when lift piece drive panel rose or descended, first branch and second branch can rise simultaneously or descend, can make the panel rise with descend in, can be more steady, traditional lift all is only one side motion, the opposite side is fixed, traditional lift causes the skew of panel easily, influences placing of panel article. Under the general condition, when the panel rose, relative rotation between lift piece and the third gag lever post, and the change of position will take place for spacing stay, if spacing stay and head rod fixed connection, when spacing stay position changed, spacing stay can drive the head rod and rotate, but when the axis of the great or head rod of frictional force between head rod and the gyro wheel and the axis of gyro wheel were not located same axis, head rod and gyro wheel will be difficult to produce and rotate, will produce great buckling between spacing stay and the lift piece, thereby make spacing stay and lift piece warp easily. Therefore, the bearing is arranged, the locking limiting rod and the first connecting rod can be rotatably connected, deformation of the locking limiting rod can be reduced, and the service life of the limiting locking sheet and the service life of the lifting sheet are prolonged.

The present invention in a preferred example may be further configured to: the lifting piece is provided with a mounting hole, a first limiting piece is installed in the mounting hole, a limiting hook is arranged on the first limiting piece in an extending mode, a limiting groove is formed between the first limiting piece and the limiting hook, a limiting bulge is arranged on the wall surface of the mounting hole in an extending mode, the limiting bulge faces towards the inside of the mounting hole, the limiting bulge is connected with the limiting groove in a matching mode, a first spring is arranged between the side wall of the first limiting piece and the side wall of the mounting hole, and the limiting rod is fixedly arranged in a penetrating mode and is far away from the first limiting piece and one end of the limiting hook.

Through adopting above-mentioned technical scheme, when the user risees the length direction of piece along spacing stay with the lift tab according to the demand of self, the gag lever post slides on separating the post, and first spring will be compressed this moment, and when breaking away from the connection between gag lever post and the separating post, the resilience force of first spring will drive the gag lever post card and establish in first locking groove and second locking groove to can make the reliable and first locking groove of gag lever post and second locking groove butt.

The invention in a preferred example may be further configured to: the inside spacing piece of second that is provided with of spacing stay, the spacing piece of second with first spacing piece overlaps the setting, spacing hole has been seted up on the spacing piece of second, spacing hole with the mounting hole communicates with each other and sets up, the gag lever post is worn to locate spacing downthehole, spacing hole is close to the wall of the one end of spacing stay has been seted up the groove that resets, be provided with anti-skidding tooth on the gag lever post, the gag lever post with the groove cooperation that resets is connected, the groove that resets is located one side that first spacing piece is close to first spring, the lift piece stretches into the one end of spacing stay is provided with a set of pothook, the spacing piece of second is close to a set of draw-in groove has been seted up to the one end of spacing stay, two the pothook respectively with two the draw-in groove corresponds the cooperation and connects.

Through adopting above-mentioned technical scheme, because the gag lever post is worn to locate spacing downthehole portion, when the spacer bar motion above the first spacing piece of lift piece drive, the gag lever post can drive the spacing piece motion of second, when the lift piece needs to reset, the direction towards spacing stay promotes the lift piece, thereby can make the wall butt of gag lever post and reset groove, the lift piece is towards the in-process of spacing stay length direction motion, the gag lever post can produce the friction with the wall in the groove that resets, thereby can carry on spacingly through the position of reset groove to the gag lever post, make the gag lever post slide in first sliding tray all the time, and be difficult to drop to first locking inslot, thereby can reset the lift piece, can descend the panel promptly. When lift piece and spacing stay separate gradually, can pass through the pothook on the one hand with the spacing piece of second along with the motion direction motion of lift piece, on the other hand can drive the spacing piece of second through the gag lever post and move along with the motion direction of lift piece.

The present invention in a preferred example may be further configured to: an arc-shaped friction plate is arranged on one side of the second limiting plate in an extending mode, the arc-shaped side wall of the arc-shaped friction plate is connected with the inner wall face of the limiting locking plate in a sliding mode, a second spring is arranged on the end portion of the second limiting plate and the end portion of the second limiting plate, and two ends of the second spring are fixed to the second limiting plate and the arc-shaped friction plate respectively.

Through adopting above-mentioned technical scheme, the lift piece drives the spacing piece of second and when the spacing stay is inside to slide, and arc friction disc and spacing stay will produce the friction, can have sufficient frictional force to make the spacing piece of second can be reliable drive the gag lever post and slide in first sliding tray through these between the two. After the surface of the arc-shaped friction plate is abraded, the second spring piece can apply thrust to the arc-shaped friction plate through self resilience force, so that friction force between the arc-shaped friction plate and the limiting locking piece can be ensured.

The invention in a preferred example may be further configured to: the end, far away from the draw-in groove, of the second limiting piece is provided with a connecting block, a connecting hole is formed in the lifting piece, a connecting piece penetrates through the connecting hole, one end, close to the connecting block, of the connecting piece is fixedly connected with the connecting block, a limiting sliding groove is formed in the lifting piece, a limiting convex edge in sliding connection with the limiting sliding groove is arranged on the connecting piece, and a fixing block is fixedly arranged at one end, far away from the connecting block, of the connecting piece.

Through adopting above-mentioned technical scheme, because the groove that resets of second spacing piece is spacing to the gag lever post that resets of lift piece needs, make gag lever post and first locking groove disconnection, the gag lever post slides in first sliding tray promptly. According to user's demand, when the panel descends to required height, the user stimulates the fixed block, can with the gag lever post with reset groove joint each other, then promote the lift piece again, can promote the lift piece, make the panel descend, when reacing required height, with gag lever post and reset groove disconnect-from connection, drag the mutual joint of gag lever post and first locking groove, can lock the height of panel once more.

The invention in a preferred example may be further configured to: the lifting piece is kept away from one side of the limiting sliding groove extends to form a convex strip, and the limiting sliding groove is located inside the convex strip.

Through adopting above-mentioned technical scheme, the support intensity of lift piece can be strengthened in the setting of sand grip, reduces the phenomenon that the lift piece produced buckling at the in-process of motion.

The invention in a preferred example may be further configured to: the limiting locking piece is close to a side face of the panel, a through hole is formed in the panel, the limiting locking piece is close to one end of the panel, a dustproof plug is arranged at the L-shaped end of the panel, a clamping block is arranged on the side, close to the limiting locking piece, of the dustproof plug, the clamping block is clamped in the through hole, clamping arms are arranged on two sides of the dustproof plug respectively, clamping grooves are formed between the clamping arms and the dustproof plug, and the clamping grooves are clamped with the limiting locking piece.

By adopting the technical scheme, because the convex strips are arranged, a larger gap is formed between the limiting locking sheet and the lifting sheet, and sundries which fall easily enter the limiting locking sheet, so that the dust plug is arranged to reduce the possibility that the sundries fall in the limiting locking sheet, and the movement between the second limiting sheet and the limiting locking sheet is not easy to form obstruction.

The invention in a preferred example may be further configured to: two first branch is close to the one end of panel is provided with first auxiliary stay respectively, first auxiliary stay's both ends respectively with first branch with the bottom surface of panel is articulated, two second branch is close to the one end of base is provided with second auxiliary stay respectively, the both ends of second auxiliary stay respectively with second branch with the base is articulated.

Through adopting above-mentioned technical scheme, first auxiliary stay pole and second auxiliary stay pole can play the effect of auxiliary stay to first branch and second branch to can improve the bearing capacity of first branch and second branch.

In summary, the present invention includes at least one of the following beneficial effects:

1. the lifting and locking limiting effect of the panel can be achieved conveniently through the arrangement of the limiting locking sheet, the lifting sheet, the first sliding groove, the first locking groove and the limiting rod;

2. the effects of facilitating lifting, locking and resetting of the panel can be achieved through the arrangement of the first limiting sheet and the second plate limiting sheet;

3. through the setting of arc friction disc and second spring, can play and ensure the frictional force between spacing piece of second and the spacing stay to can ensure the effect that the lift tab can reliably reset.

4. Through setting up first locking groove and second locking groove respectively to a plurality of, can realize spacing stay and lift tab's multistage regulation.

Drawings

Fig. 1 is a schematic overall structure diagram of the table body.

Fig. 2 is an explosion structure diagram for showing the internal structure of the second limiting sheet in the lifting limiting structure.

Fig. 3 is a schematic view of a position structure for embodying a fixing block in the elevation limiting structure.

Fig. 4 is an explosion structure diagram for showing the internal structure of the first limiting sheet in the lifting limiting structure.

Fig. 5 is a partially enlarged schematic view of a portion a in fig. 4.

Fig. 6 is a partially enlarged schematic view of a portion B in fig. 2.

Fig. 7 is a partially enlarged schematic view of a portion C in fig. 3.

Fig. 8 is a schematic structural view of a protrusion strip in the elevation limiting structure.

In the figure, 1, a table body; 11. a base; 12. a panel; 13. a cross lifting support rod; 131. a first support bar; 132. a second support bar; 133. a first connecting rod; 134. a second connecting rod; 135. a roller; 136. a slide rail; 137. rotating the rod; 138. a third connecting rod; 2. a lifting limit structure; 21. a limiting locking sheet; 211. a first sliding groove; 212. a first locking groove; 213. separating the columns; 214. a second sliding groove; 215. a second locking groove; 22. a lifting sheet; 221. a limiting rod; 2211. anti-slip teeth; 222. mounting holes; 2221. a limiting bulge; 223. a first limiting sheet; 2231. a limiting hook; 2232. a limiting groove; 224. a first spring; 225. a second limiting sheet; 2251. a limiting hole; 2252. a reset groove; 2253. a card slot; 2254. an arc-shaped friction plate; 2255. a second spring; 226. a hook; 227. a convex strip; 23. connecting blocks; 231. connecting holes; 232. connecting sheets; 233. a limiting chute; 234. a limiting convex rib; 235. a fixed block; 3. a through hole; 31. a dust plug; 32. a clamping block; 33. a chucking arm; 34. a clamping groove; 4. a first auxiliary support bar; 41. the second auxiliary support pole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the portable lifting type office table disclosed by the invention comprises a table body 1, wherein the table body 1 comprises a base 11 and a panel 12, a plurality of crossed lifting support rods 13 are hinged between the base 11 and the panel 12, the plurality of crossed lifting support rods 13 comprise a pair of first support rods 131 arranged in parallel and a pair of second support rods 132 arranged in parallel, the two first support rods 131 are positioned at two sides of the panel 12, the two second support rods 132 are positioned at two sides of the panel 12, the first support rods 131 and the second support rods 132 positioned at the same side of the panel 12 are arranged in a crossed manner, a rotating rod 137 is arranged at the crossed position of the first support rods 131 and the second support rods 132, and the first support rods 131 and the second support rods 132 are both rotatably connected with the rotating rod 137. Two ends of the same side of the two first supporting rods 131 are rotatably connected with a first connecting rod 133, two ends of the same side of the two second supporting rods 132 are rotatably connected with a second connecting rod 134, two ends of the first connecting rod 133 and two ends of the second connecting rod 134 are respectively connected with a roller 135, and the base 11 and the panel 12 are respectively provided with a sliding rail 136 cooperatively connected with the roller 135. When the panel 12 is driven to ascend, the first fulcrum bar 131 and the second fulcrum bar 132 can rotate around the rotating rod 137, and the angle between the first fulcrum bar 131 and the second fulcrum bar 132 can be changed, so that the ascending and descending of the panel 12 can be controlled. That is, when the angle between the first and

second struts

131 and 132 is gradually decreased, the relative movement between the first and second connecting

rods

133 and 134 is performed, the panel 12 is in the ascending movement, and when the angle between the first and

second struts

131 and 132 is gradually increased, the first and second connecting

rods

133 and 134 are moved backward, and the panel 12 is in the descending movement. In order to improve the bearing capacity of the first supporting rod 131 and the second supporting rod 132, a first auxiliary supporting rod 4 is respectively disposed at one end of the two first supporting rods 131 close to the panel 12, two ends of the first auxiliary supporting rod 4 are respectively hinged to the first supporting rod 131 and the bottom surface of the panel 12, a second auxiliary supporting rod 41 is respectively disposed at one end of the two second supporting rods 132 close to the base 11, and two ends of the second auxiliary supporting rod 41 are respectively hinged to the second supporting rod 132 and the base 11.

Referring to fig. 2 and 3, a third connecting rod 138 (shown in fig. 1) is disposed at a position where the two first supporting rods 131 and the second supporting rod 132 are close to the rotating rod 137, the third connecting rod 138 is located between the rotating rod 137 and the panel 12, a lifting limiting structure 2 is disposed between the second connecting rod 134 and the third connecting rod 138 on the base 11, the lifting limiting structure 2 includes a limiting locking piece 21 and a lifting piece 22, the lifting piece 22 is slidably disposed inside the limiting locking piece 21, one end of the limiting locking piece 21, which is far away from the lifting piece 22, is connected with the second connecting rod 134, one end of the lifting piece 22, which is far away from the limiting locking piece 21, is connected with the third connecting rod 138, or one end of the limiting locking piece 21, which is far away from the lifting piece 22, is connected with the third connecting rod 138, and one end of the lifting piece 22, which is far away from the limiting locking piece 21, is connected with the second connecting rod 134. The two side wall surfaces of the limiting locking piece 21 are provided with a first sliding groove 211 and a second sliding groove 214 with the same specification, and one side wall of each first sliding groove 211 and each second sliding groove 214 is provided with a plurality of first locking grooves 212 and second locking grooves 215 with the same specification. A plurality of partition columns 213 obliquely arranged in the same direction are respectively formed between every two adjacent first locking grooves 212 and between every two adjacent second locking grooves 215, and the plurality of partition columns 213 are inclined towards the direction of the lifting plate 22 far away from the limiting locking plate 21. A limiting rod 221 is disposed at an end portion of the lifting plate 22 extending into the limiting locking plate 21, and both ends of the limiting rod 221 respectively extend out of the first locking groove 212 and the second locking groove 215. When the panel 12 rises, the limit locking piece 21 and the lifting piece 22 move in opposite directions, the limit rod 221 slides along the wall surfaces of the partition columns 213 on the two sides of the limit locking piece 21, and when the required height is reached, the limit rod 221 is pressed downwards, so that the limit rod 221 can be locked in the first locking groove 212 and the second locking groove 215 at the required height position.

Referring to fig. 4 and 5, an installation hole 222 is formed in one end of the lifting plate 22 extending into the limiting locking plate 21, a limiting protrusion 2221 extends from a wall surface of the installation hole 222, the limiting protrusion 2221 is arranged towards the inside of the installation hole 222, a first limiting plate 223 is installed in the installation hole 222, a limiting hook 2231 extends from one end of the first limiting plate 223 towards the limiting protrusion 2221, a limiting groove 2232 is formed between the first limiting plate 223 and the limiting hook 2231, and the limiting groove 2232 and the limiting protrusion 2221 are connected in a matched manner. The limiting rod 221 is fixedly arranged at one end of the first limiting sheet 223 far away from the limiting hook 2231, and in order to facilitate the mutual sliding between the limiting rod 221 and the separation column 213, a first spring 224 is arranged between the side wall of the first limiting sheet 223 and the side wall of the mounting hole 222. When the limiting rod 221 slides on the separation column 213, the first spring 224 is compressed, and when the limiting rod 221 and the separation column 213 are disconnected, the resilience force of the first spring 224 can clamp the limiting rod 221 in the first locking groove 212 and the second locking groove 215, so that the two ends of the limiting rod 221 can be reliably abutted against the first locking groove 212 and the second locking groove 215.

Referring to fig. 6, in order to facilitate the resetting of the limiting rod 221, even if the limiting locking piece 21 and the lifting piece 22 can move relatively, the second limiting piece 225 is arranged inside the limiting locking piece 21, the second limiting piece 225 and the first limiting piece 223 are arranged in an overlapping manner, and the side wall of the first limiting piece 223 is connected with the limiting locking piece 21 in a sliding manner. Spacing hole 2251 has been seted up on second spacing piece 225, and spacing hole 2251 communicates with each other with mounting hole 222 and sets up, and the gag lever post 221 wears to locate in spacing hole 2251, has seted up the groove 2252 that resets at the wall of spacing hole 2251, and the groove 2252 that resets is towards the one end that spacing locking sheet 21 kept away from lift piece 22. The limit rod 221 is connected with the reset groove 2252 in a matching manner, and in order to increase the friction force between the limit rod 221 and the wall surface of the reset groove 2252, anti-slip teeth 2211 are arranged on the limit rod 221. When the panel 12 descends, the stopper rod 221 and the reset groove 2252 are clamped to each other, and the reset groove 2252 can limit the position of the stopper rod 221, so that the stopper rod 221 always slides in the first sliding groove 211. The lifting sheet 22 is pushed, so that the lifting sheet 22 and the limiting locking sheet 21 can move relatively. In order to ensure reliable connection between the reset groove 2252 and the stopper rod 221, an arc-shaped friction plate 2254 is extended from a sidewall of the first stopper 223, an arc-shaped sidewall of the arc-shaped friction plate 2254 is slidably connected to an inner wall surface of the stopper locking plate 21, and in order to ensure friction between the arc-shaped friction plate 2254 and the stopper locking plate 21, a second spring 2255 is disposed at an end of the second stopper 225 and an end of the second stopper 225, and both ends of the second spring 2255 are fixed to the second stopper 225 and the arc-shaped friction plate 2254, respectively. When the surface of the arc-shaped friction plate 2254 is worn, the second spring 2255 can apply a pushing force to the arc-shaped friction plate 2254 by its own resilient force, so that a frictional force between the arc-shaped friction plate 2254 and the catcher pin 21 can be ensured.

Referring to fig. 6 and 7, in order to enable the limiting locking piece 21 and the lifting piece 22 to be lifted step by step, a connecting block 23 is arranged at one end of the second limiting piece 225 far away from the clamping groove 2253, a connecting hole 231 is formed in the lifting piece 22, a connecting piece 232 penetrates through the connecting hole 231, one end of the connecting piece 232 close to the connecting block 23 is fixedly connected with the connecting block 23, and a fixing block 235 is fixedly arranged at one end of the connecting piece 232 far away from the connecting block 23. The pushing and pulling force applied to the fixing block 235 can drive the connecting block 23 to ascend and descend, and the second limiting piece 225 can be driven to ascend and descend. The lifting piece 22 is provided with a limiting sliding groove 233, the connecting piece 232 is provided with a limiting convex rib 234 which is in sliding connection with the limiting sliding groove 233, and the connecting piece 232 and the lifting piece 22 can be reliably attached through mutual limiting between the limiting sliding groove 233 and the limiting convex rib 234. In order to make the opening of the limiting sliding groove 233 not easily affect the strength of the lifting piece 22, a convex strip 227 (as shown in fig. 8) extends on one surface of the lifting piece 22 away from the limiting sliding groove 233, the limiting sliding groove 233 is located inside the convex strip 227, the supporting strength of the lifting piece 22 is enhanced through the arrangement of the convex strip 227, and the phenomenon that the lifting piece 22 bends in the moving process is reduced.

Referring to fig. 6, a set of hooks 226 is disposed at an end of the lifting plate 22 extending into the limit locking plate 21, a set of slots 2253 is disposed at an end of the second limit plate 225 close to the limit locking plate 21, and the two hooks 226 are respectively connected to the two slots 2253 in a corresponding and matching manner. When opposite movement between spacing locking piece 21 and the lift piece 22, on the one hand, can be through a lateral wall contact that spacing pole 221 and spacing hole 2251 kept away from reset groove 2252 to drive the spacing piece 225 motion of second, on the other hand, can drive the motion direction motion of spacing piece 225 along with lift piece 22 of second through gag lever post 221.

Referring to fig. 2 and 4, due to the arrangement of the protruding strips 227, a large gap is formed between the limiting locking piece 21 and the lifting piece 22, and impurities which easily fall off enter the limiting locking piece 21, so that the dustproof plug 31 is arranged at one end of the limiting locking piece 21 close to the panel 12, the dustproof plug 31 is arranged in an "L" shape, and the dustproof plug 31 is inserted into the end of the limiting locking piece 21 so as to reduce dust entering the limiting locking piece 21. A through hole 3 is formed in one side surface of the limiting locking sheet 21 close to the panel 12, a clamping block 32 is arranged on one side surface of the dust plug 31 close to the limiting locking sheet 21, and the clamping block 32 is clamped in the through hole 3. Through the connection between fixture block 32 and the through-hole 3, fix dustproof stopper 31, for make dustproof stopper 31 fixed more reliable, be provided with chucking arm 33 respectively in the both sides of dustproof stopper 31, be formed with chucking groove 34 between two chucking arms 33 and the dustproof stopper 31, joint each other between chucking groove 34 and the spacing stay 21.

The implementation principle of the above embodiment is as follows: when the panel 12 rises, the base 11 is fixed, the user provides an upward force for the panel 12, the angle between the first support rod 131 and the second support rod 132 will gradually decrease, because the position of the base 11 is unchanged, when the angle between the first support rod 131 and the second support rod 132 gradually decreases, the distance between the third connecting rod 138 and the first connecting rod 133 will become larger, so the lifting sheet 22 will be under the action of a pulling force, the limiting rod 221 will slide along the wall surface of the separation column 213, and the hook 226 on the lifting sheet 22 will pull the second limiting sheet 225 to move along the same direction as the moving direction of the lifting sheet 22. When the required height is reached, the limiting rod 221 is pressed downwards, and the limiting rod 221 can be locked in the first locking groove 212 and the second locking groove 215 at the required height position.

When the panel 12 needs to be lowered, a user pulls the fixing block 235 in a direction away from the limiting locking sheet 21, namely, a pulling force is applied to the connecting block 23 through the connecting sheet 232 on the fixing block 235, the limiting rod 221 and the reset groove 2252 can be clamped with each other by applying a pulling force to the lifting sheet 22, then the lifting sheet 22 is pushed, the lifting sheet 22 can be pushed to descend, so that the panel 12 can be pushed to descend, when the required height is reached, the limiting rod 221 and the reset groove 2252 are disconnected by pulling the lifting sheet 22, then the limiting rod 221 and the first locking groove 212 are clamped with each other, and the height of the panel 12 can be locked again or descended to the lowest point.

The embodiments of the present invention are all preferred embodiments of the present invention, and the scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.

Claims

1. The utility model provides a portable over-and-under type desk, includes the table body (1), the table body (1) includes base (11) and panel (12), base (11) with it is provided with a plurality of alternately lifting support pole (13) to articulate between panel (12), its characterized in that: a plurality of lifting limiting structures (2) are arranged on the cross lifting support rods (13), each lifting limiting structure (2) comprises a limiting locking piece (21) and a lifting piece (22), each lifting piece (22) penetrates through the corresponding limiting locking piece (21) in a sliding mode, one end, far away from the corresponding lifting piece (22), of each limiting locking piece (21) is connected with one end, close to the corresponding base (11), of each cross lifting support rod (13), one end, far away from the corresponding limiting locking piece (21), of each lifting piece (22) is connected with one end, close to the corresponding panel (12), of each cross lifting support rod (13), a first sliding groove (211) is formed in the side wall of each limiting locking piece (21), a plurality of first locking grooves (212) communicated with the corresponding first sliding grooves (211) are formed in one side wall of each first sliding groove (211), and limiting rods (221) are arranged at the end portions, extending into the corresponding limiting locking pieces (21), of the lifting pieces (22), the limiting rod (221) extends out of the first locking groove (212) and is matched and connected with the first locking groove (212);

A mounting hole (222) is formed in the lifting piece (22), a first limiting piece (223) is mounted in the mounting hole (222), a limiting hook (2231) extends from the first limiting piece (223), a limiting groove (2232) is formed between the first limiting piece (223) and the limiting hook (2231), a limiting protrusion (2221) extends from the wall surface of the mounting hole (222), the limiting protrusion (2221) faces the inside of the mounting hole (222), the limiting protrusion (2221) and the limiting groove (2232) are connected in a matched manner, a first spring (224) is arranged between the side wall of the first limiting piece (223) and the side wall of the mounting hole (222), and the limiting rod (221) is fixedly arranged at one end, far away from the limiting hook (2231), of the first limiting piece (223);

the inner part of the limiting and locking sheet (21) is provided with a second limiting sheet (225), the second limiting sheet (225) and the first limiting sheet (223) are arranged in an overlapping mode, a limiting hole (2251) is formed in the second limiting sheet (225), the limiting hole (2251) and the mounting hole (222) are arranged in a communicating mode, the limiting rod (221) penetrates through the limiting hole (2251), a reset groove (2252) is formed in the wall surface, close to one end of the limiting and locking sheet (21), of the limiting hole (2251), anti-skidding teeth (2211) are arranged on the limiting rod (221), the limiting rod (221) is connected with the reset groove (2252) in a matched mode, the reset groove (2252) is located on one side, close to the first spring (224), of the first limiting sheet (223), and one end, extending into the limiting and locking sheet (21), of the lifting sheet (22) is provided with a group of clamping hooks (226), one end, close to the limiting locking sheet (21), of the second limiting sheet (225) is provided with a group of clamping grooves (2253), and the two clamping hooks (226) are correspondingly matched and connected with the two clamping grooves (2253) respectively;

A connecting block (23) is arranged at one end, far away from the clamping groove (2253), of the second limiting piece (225), a connecting hole (231) is formed in the lifting piece (22), a connecting piece (232) penetrates through the connecting hole (231), one end, close to the connecting block (23), of the connecting piece (232) is fixedly connected with the connecting block (23), a limiting sliding groove (233) is formed in the lifting piece (22), a limiting convex rib (234) which is slidably connected with the limiting sliding groove (233) is arranged on the connecting piece (232), and a fixing block (235) is fixedly arranged at one end, far away from the connecting block (23), of the connecting piece (232);

an arc-shaped friction plate (2254) extends from one side of the second limiting plate (225), an arc-shaped side wall of the arc-shaped friction plate (2254) is connected with the inner wall surface of the limiting locking plate (21) in a sliding manner, a second spring (2255) is arranged at the end of the second limiting plate (225), and two ends of the second spring (2255) are fixed to the second limiting plate (225) and the arc-shaped friction plate (2254) respectively.

2. A portable lift desk as recited in claim 1 wherein: every adjacent two all be formed with between first locking groove (212) and separate post (213), it is a plurality of separate post (213) slope setting with the direction, and a plurality of separate post (213) orientation lift piece (22) are kept away from the direction slope of spacing stay (21), spacing stay (21) are kept away from the side of first sliding tray (211) is seted up with a plurality of second sliding tray (214) that first sliding tray (211) set up with the specification, spacing stay (21) are kept away from the side of first sliding tray (211) is seted up with a plurality of second locking grooves (215) that first locking groove (212) set up with the specification, stretch out from first locking groove (212) and second locking groove (215) respectively at the both ends of gag lever post (221).

3. A portable lift desk as recited in claim 1 wherein: a plurality of cross lift bracing piece (13) is including a pair of first branch (131) and a pair of second branch (132), and is a pair of first branch (131) parallel arrangement each other, and is a pair of second branch (132) parallel arrangement each other, the homonymy first branch (131) with second branch (132) cross arrangement, two the both ends of first branch (131) rotate respectively and are connected with first connecting rod (133), two the both ends of second branch (132) rotate respectively and are connected with second connecting rod (134), the both ends of first connecting rod (133) with the both ends of second connecting rod (134) are connected with gyro wheel (135) respectively, base (11) with be provided with respectively on panel (12) with slide rail (136) that gyro wheel (135) cooperation is connected, first branch (131) with the intersection of second branch (132) is provided with dwang (137), two first branch (131) with second branch (132) are close to the position of dwang (137) sets up third connecting rod (138), third connecting rod (138) are located dwang (137) with between panel (12), spacing stay (21) are kept away from the one end of lift piece (22) with head rod (133) rotate to be connected, lift piece (22) are kept away from the one end of spacing stay (21) with third connecting rod (138) rotate to be connected.

4. A portable elevating desk as set forth in claim 2 wherein: the lifting piece (22) is far away from one surface of the limit sliding groove (233) and extends to form a protruding strip (227), and the limit sliding groove (233) is located inside the protruding strip (227).

5. A portable lifting desk as recited in claim 4 wherein: spacing stay (21) are close to through-hole (3) have been seted up to a side of panel (12), spacing stay (21) are close to the one end of panel (12) is provided with dustproof stopper (31), dustproof stopper (31) set up to "L" shape, dustproof stopper (31) are close to the one side of spacing stay (21) is provided with fixture block (32), fixture block (32) card is located in through-hole (3), the both sides of dustproof stopper (31) are provided with chucking arm (33), two respectively chucking arm (33) with be formed with chucking groove (34) between dustproof stopper (31), chucking groove (34) with mutual joint between spacing stay (21).

6. A portable elevating desk as set forth in claim 3 wherein: two first branch (131) are close to the one end of panel (12) is provided with first auxiliary support pole (4) respectively, the both ends of first auxiliary support pole (4) respectively with first branch (131) with the bottom surface of panel (12) is articulated, two second branch (132) are close to the one end of base (11) is provided with second auxiliary support pole (41) respectively, the both ends of second auxiliary support pole (41) respectively with second branch (132) with base (11) are articulated.