CN1457725A - Sitting posture correcting desk and chair for vision and skeleton protection - Google Patents
Sitting posture correcting desk and chair for vision and skeleton protection Download PDFInfo
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- CN1457725A CN1457725A CN 03130853 CN03130853A CN1457725A CN 1457725 A CN1457725 A CN 1457725A CN 03130853 CN03130853 CN 03130853 CN 03130853 A CN03130853 A CN 03130853A CN 1457725 A CN1457725 A CN 1457725A
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- 230000004438 eyesight Effects 0.000 title claims abstract description 18
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 17
- 230000036541 health Effects 0.000 claims abstract description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 29
- 230000004310 photopic vision Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 4
- 210000003128 head Anatomy 0.000 claims description 4
- 210000000683 abdominal cavity Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 210000000245 forearm Anatomy 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000002889 sympathetic effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000004630 mental health Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 3
- 230000004379 myopia Effects 0.000 description 2
- 208000001491 myopia Diseases 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037180 bone health Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000069 prophylactic effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
The invention relates to a study desk and chair which have important influence on the health of children and teenagers, and is characterized in that the desk and chair can be adjusted up and down as required according to the unequal heights and the continuous growth of the bodies of students, and the desk and chair also have better protection effect on the eyesight and bones of long-term users. The vision and skeleton protection prompting sitting posture correction device is arranged on the desk, and can prompt a user to correct the sitting posture for learning and promote the physical and mental health growth of students. Compared with the similar technology, the invention has the advantages that: 1. the desk and the chair are designed into a matched pair, and can be adjusted to be lifted according to requirements so as to adapt to the unequal heights of students and the increasing use requirements of bodies. 2. The table and chair of the invention have better protection and prevention functions than the traditional table and chair. 3. The intermittent micro-vibration sense of vibration for a few seconds and stop for a few seconds is adopted as a prompt signal for prompting to correct the bad sitting posture, so that the good sitting posture is kept, and the protection to eyesight and bones is facilitated.
Description
The present invention relates to a kind of health to children and youth has the study table and the chair of material impact; it is characterized in that table and chair can make lift adjustment as required by the continuous growth with health that do not wait of student's height; also in order to realize that tables and chairs have protective effect to long-term user's eyesight, bone; for this reason; the related ancon of desktop; and eyesight, the bone protection prompting device that corrects faulty sitting posture is set on the table, and can point out the user to rectify the study sitting posture, promote growing up healthy and sound in all respects of student.
In recent years, people more and more pay attention to follow-on growing up healthy and sound, and the theory of " at the beginning of the people, jade carving becomes, and benefit is lifelong " generally is accepted.Many producers develop the product of correcting the bad writing posture of children one after another; country also attaches great importance to; example: just the GB/T3976-2002 of revision carries out three new bright engineerings etc. to middle and primary schools' desk and chair production standard, for a series of measures have been released in protection student's eyesight and bone health growth.But the desk and chair that uses of school and study table and the chair height that uses in the family all are based on fixed so far, and the model of chair uncertain supporting and the student is in the ever-increasing stage of health.As the tables and chairs of buying a level altitude are shorter working life, and health has increased the way that can only take to change again tables and chairs; The student and the head of a family also expect to develop and a kind ofly follow the continuous growth of health and not waiting of height can make the study table and the chair of lift adjustment as required.
The expert thinks that then desk and chair is the basic equipment in the educational institution, and the health of children and youth is had material impact, and table and chair will certainly bring out incorrect sitting-pose as if the continuous growth that can not follow student's health.Correct sitting posture is that shank becomes 90 ° with thigh, thigh respectively with upper body.The teenager is in the critical period of body development, and abnormal sitting posture really can cause diseases such as myopia and deformity of spinal column, and above situation also is one of high reason of China recent years rate of myopia.
Content of the present invention:
1. the objective of the invention is to develop a kind of study table that can contain multiple model height and with the seat of its coupling.
2. further aim of the present invention is can be in default scope with the study table and the chair that are containing multiple model height
Make lift adjustment as required, make study table and chair can adapt to the pupil of 135cm height, also can adapt to height
Use with interior student at 180cm.
3. further object of the present invention is ancon to be set on study table and eyesight, bone protection prompting correct faulty sitting posture
Device makes tables and chairs give play to better protection and prophylactic function.
Realize that technical scheme of the present invention is: develop a kind of study table and the chair that can in the span scope of 6 kinds of model height, make lift adjustment, and again can be to the seat surface of seat effectively dark and backrest point regulate, to adapt to not waiting and the ever-increasing use needs of health of student's height.Also eyesight, bone are had the better protection effect, ancon and eyesight, the bone protection prompting device that corrects faulty sitting posture are set on study table for this reason in order to realize, this device by the structure that corrects faulty sitting posture, prompting correct structure, chamber structure for use is formed.Again each model that contained in the tables and chairs and the permanent mark of height scope of its adaptation are located on the tables and chairs, compare when using.
Description of drawings
Fig. 1: be to make the study table of lift in height adjusting and the structural representation of chair among the present invention:
Fig. 2: be the vertical profile structural representation of doing lift in height adjusting and and backrest point do adjusting effectively dark among the present invention to seat surface:
Fig. 3: be eyesight, bone protection prompting among the present invention apparatus structure schematic diagram that corrects faulty sitting posture:
The specific embodiment:
As shown in Figure 1 and Figure 2: the correct faulty sitting posture lifting adjusting structure of study table and chair of eyesight, bone protection is to have pedestal bottom plate (1), pedestal (2), firm screw (3), pedestal screw (4), lift adjustment screw (5), upright main support frame (6), book drawer (7), the device that corrects faulty sitting posture (8), ancon (9), desktop (10), seat surface (11), backrest point (12), back rest (13), double-screw bolt (14), screw (15), depth adjustment screw (16) to form.
Its technical characterictic is: adopt by two pedestals (2) be connected with two upright main support frames (6) and horizontal support and the skeleton that constitutes with alternative table leg, for realizing that table can be that (span between every kind of model of table is 30mm at the different lift adjustment screws (5) of the upward default 6 kinds of model height of the upright main support frames in both sides (6) in employing as lift adjustment with chair, span between every kind of model of chair is 20mm, wherein the span between 8-9 number is 10mm), the pedestal screw (4) of the level altitude that the lift adjustment screw (5) (hereinafter to be referred as screw) on the pedestal (2) on also default and the skeleton (6) is complementary and firm screw (3).Again skeleton (6) is installed in the both sides pedestal (2), make screw (5) that skeleton (6) goes up upper just in time with pedestal (2) on pedestal screw (4) connect that (it promptly is when the screw on the skeleton and the screw on the pedestal when just in time the hole is to the hole that what is called connects, being about to the cup head double-screw bolt inserts in two screws, screw nut, skeleton firmly is connected with pedestal, is called for short connecting).Constituted the minimum starting point height of this table and chair.As the height of need raising table and chair, be about to skeleton (6) and upwards promote, pedestal screw (4) and firm screw (3) on screw (5) the most the next on the skeleton (6) and the pedestal (2) are connected in the lump, promptly constitute the maximum height of table and chair.The method of pressing above-mentioned lift adjustment screw can realize the height of 6 kinds of models on table and chair, to adapt to not waiting and the ever-increasing needs of health of student's height.Be provided with bookshelf at table body rear portion, establish attached two ancons (9) in the both sides of desktop (10) service orientation, the student forearm can be put naturally when writing be put on the ancon (9), useful bone loosens, and avoids forward lean, helps sitting posture and rectifies.Desktop can be the plane, also can be to sit people's side direction the domatic of 0 ° of-12 ° of angle that have a down dip.
As shown in Figure 1 and Figure 2:
Learn the lift in height of table and regulate method of operating, example: connect as table skeleton (6) being gone up the screw (5) of upper and the pedestal screw (4) on the pedestal (2), this has just constituted the study table that highly meets No. 6 height of national standard size for 610mm.Pupil in No. 6 study suitable 135-149cm height scope uses. if need improve the height of table, being about to skeleton (6) upwards carries, pedestal screw (4) and firm screw (3) on the most the next screw (5) and the pedestal (2) are connected in the lump, this has just constituted highly No. 1 study table for 760mm, and the student in No. 1 suitable 173-180cm height scope of study table uses.For preventing to wear and tear because of the intensive skeleton crack or the screw of causing of screw, at the position that is furnished with screw sheath is set again for this reason, it is in order to make skeleton and pedestal strengthen steadiness that firm screw (3) is set on the pedestal.
The lift in height adjustment structure of chair is identical with the structure and the method for operating of above-mentioned study table with method of operating, example: connect with pedestal screw (4) as screw (5) with chair skeleton (6) upper, constituting the seat surface height is No. 6 chairs of 340mm, No. 6 the interior student of the suitable 135-149cm height scope of chair uses. in this way screw (5) the most the next on the chair skeleton (6) and pedestal screw (4) and firm screw (3) are connected, it is No. 1 chair of 440mm that this chair has just constituted the seat surface height, and No. 1 the interior student of the suitable 173-180cm height scope of chair uses.
Change the model of chair, not only will do the adjusting of lift in height, also need in addition backrest point (12) and corresponding adjusting of the effectively dark work of seat surface (11).Example: student's height adopts the 2-1 chair 165-180cm scope planted agent, and the backrest point (12) of 2-1 chair should be 220mm apart from seat surface (11) height, the effectively dark 380mm of seat surface (11); When student's height is in the 135-157cm scope, just only need to use the 6-5 chair; For this reason, at first to change effectively dark gauge size of backrest point (12) and seat surface (11), method of operating is to adopt double-screw bolt (14) with former fixedly back rest (13) all to revolve to take off, again with back rest (13) downwards with towards one grade of reach, make the depth adjustment screw (16) on screw (15) the aligning skeleton (6) on the back rest (13), all insert double-screw bolt (14) in each screw respectively again and screw firm good back rest (13).To realize backrest point (12) apart from the high 200mm of seat surface (11), the effectively dark 340mm of seat surface (11) meets the requirement of 6-5 chair.
As shown in Figure 3: student eyesight; it is that fixed guide (1 ') is arranged that the device that corrects faulty sitting posture is pointed out in the bone protection; button-headed screw (2 '); nut (3 '); connect chassis (4 '); shifting sledge (5 '); button-headed screw (6 '); axle bed (7 '); axle (8 '); the kiss hole of bead (9 '); power supply (10 '); little chip that shakes (11 '); switch (12 '); steel ball (13 '); spring (14 '); seat (15 ') corrects faulty sitting posture; locator (16 '); lifting regulator (17 '); spring (18 '); steel ball (19 '); waveform hole (20 '); contact switch (21 '); photopic vision spacing chi (22 '); steady rail wooden frame (23 '); plate washer (24 ') is formed.
As shown in Figure 3, the structure that corrects faulty sitting posture in the device is to have: axle bed (7 '), axle (8 '), the kiss hole of bead (9 '), steel ball (13 '), spring (14 '), correct faulty sitting posture seat (15 '), locator (16 '), lifting regulator (17 '), spring (18 '), steel ball (19 '), waveform hole (20 '), photopic vision spacing chi (22 '), steady rail wooden frame (23 '), plate washer (24 ') are formed.
Its technical characterictic is: axle bed (7 ') is to connect two ad hoc axle beds in the integral body of chassis (4 '), employing all is provided with corresponding axis hole in the bottom of both sides axle bed (7 ') and seat (15 ') bottom that corrects faulty sitting posture, using axle (8 ') that it is run through again connects the three, formation makes the seat (15 ') that corrects faulty sitting posture can turn to the upright state that crouches, but lies down forward only in connecting chassis (4 ').Repair from now on for convenient, special back at the seat (13 ') that corrects faulty sitting posture is provided with displaceable plate washer (24 ').To stand after vertical surely be that employing is at each default spring eye of the upper end of both sides axle bed (7 ') going to for the seat (15 ') of guaranteeing to correct faulty sitting posture, load onto spring (14 ') in the hole, in spring, embed steel ball again, half steel ball (13 ') that just in time makes both sides expose spring after the seat (15 ') that corrects faulty sitting posture goes to vertically is fit in the kiss hole of bead (9 ') that is arranged on a both sides, lower end that correct faulty sitting posture, and the seat (15 ') of realizing correcting faulty sitting posture is surely upright can not topple over automatically.The transverse horizontal height of photopic vision spacing chi (22 ') can be to adopt the upright plate lower end in photopic vision spacing chi (22 ') that the shock mount hole is set as lift adjustment, install spring (18 ') in the hole, again steel ball (19 ') is embedded two of turn, upright plate with photopic vision spacing chi (22 ') lower end is installed in the abdominal cavity of the seat (15 ') that corrects faulty sitting posture again, make both sides steel ball (19 ') that exposes spring (18 ') circle and waveform hole (20 ') break-in that is arranged on a both sides, abdominal cavity that correct faulty sitting posture, make the cunning of lift adjustment smooth.The selection of photopic vision spacing chi (22 ') transverse horizontal height general with the proper sitting posture of user after last chest or lower jaw is parallel is advisable.For stoping lifting regulator (17 ') to glide, setting can screw the horned nut of location in lifting regulator (17 ').Employing is installed a locator that can turn to (16 ') on the preceding top of default steady rail wooden frame (23 '), utilizes locator (16 ') top shelves shifting sledges (5 ') that it is located as required.
As shown in Figure 3, prompting rectification structure is to have: power supply (10 '), little chip that shakes (11 '), switch (12 '), contact switch (21 ') etc. are formed.
Its technical characterictic is: adopt and defaultly in the seat that corrects faulty sitting posture the position of power supply (10 '), little chip that shakes (11 '), switch (12 '), contact switch devices such as (21 ') can be installed and by lead they be connected.When appearring in the user, the head or the chest of sitting posture when bad touch photopic vision spacing chi (22 '), the sense of shaking that declines of the interruption that promptly can aware shake several seconds, the several seconds of stopping this moment, this little sense signal that shakes is urged fast correction incorrect sitting-pose exactly, the distance that chest and desktop edge is kept an about fist, after new line is squared one's shoulders, the sense of shaking promptly disappears, and makes to keep the photopic vision angle between eyes and reading and writing thing.
As shown in Figure 3, chamber structure for use is to have: fixed guide (1 '), button-headed screw (2 '), nut (3 '), connection chassis (4 '), shifting sledge (5 '), button-headed screw (6 ') are formed.
Its technical characterictic is: the structure that will correct faulty sitting posture (structure is corrected in prompting) is installed in and connects on the chassis (4 '); and connect chassis (4 ') is to be installed on the shifting sledge (5 ') of both sides with button-headed screw (6 '); shifting sledge (5 ') is to be embedded in the groove of fixed guide (1 '); the fixed guide of both sides (1 ') be with button-headed screw (2 ') spinning in establishing the nut (3 ') that is embedded in the steady rail wooden frame (23 '); adopt said method to constitute a firm carrier that carries whole rack device; if be contained in book drawer (7) top at desktop (10) back; with the eyesight after realizing to fold; the bone protection device that corrects faulty sitting posture advances in the lump and outstandingly puts the top that is concealed in book drawer (7), does not put books but do not influence in the book drawer (7); stationery.
Below in conjunction with accompanying drawing: one embodiment of the present of invention are further described:
Enable eyesight, when bone protection prompting corrects faulty sitting posture device, please follow these steps to operation:
One. the structure that will correct faulty sitting posture is pulled out from book drawer (7) top in the lump together with connecting chassis (4 ').
Two. will put down the seat (15 ') that corrects faulty sitting posture that crouches in connecting chassis (4 ') and go to vertically.
Three. will connect chassis (4 ') again and push away forward, and make the seat (15 ') that corrects faulty sitting posture come to the desktop edge.
Four. turn to shifting sledge (5 ') to stop its outside slip the locator (16 ') on steady rail wooden frame (23 ') top.
Five. unscrew the horned nut in the lifting regulator (17 ') earlier, with the transverse horizontal height of photopic vision spacing chi (22 ')
Increase to suitable height, screw horned nut again, to stop photopic vision spacing chi (22 ') to decline.
Six. open switch (12 ').
Collection follows these steps to operation:
One. close switch (12 ').
Two. with photopic vision spacing chi (22 ') downward modulation by to the seat that corrects faulty sitting posture.
Three. locator (16 ') turned to depart from shifting sledge (5 '), be about to connect chassis (4 ') and outwards pull out.
Four. slow the pushing over forward quietly of the seat (15 ') that will correct faulty sitting posture again makes its flat crouching in connecting chassis (4 ').
Five. the seat (15 ') that will correct faulty sitting posture again advances outstanding putting in book drawer (7) top in the lump together with connecting chassis (4 ').
Claims (9)
1. the health to children and youth has the study table and the chair of material impact, it is characterized in that table and chair can be followed the continuous growth of student's height and hoisting depth can be made lift adjustment as required according to the student of different heights again.Learn to be provided with on the table protection of eyesight bone and point out the device that corrects faulty sitting posture, this device is made up of the structure that corrects faulty sitting posture, prompting rectification structure, chamber structure for use.The tables and chairs main body adopts wooden (back rest of chair adopts light steel), and the device that corrects faulty sitting posture is selected the plastic production of security for use, is single combined folding.Permanent mark is established the reference table of selecting the tables and chairs lifting according to user's height on the tables and chairs, and the suitable student of these tables and chairs uses when learning at home.
2. according to claim 1, on the national standard basis that it is characterized in that making according to the GB/T3976-2002 desk and chair, the skeleton that employing is supported with two upright masters by two pedestals and horizontal support is connected to be constituted is to substitute table leg.And at default lift adjustment screw on the upright main support frame after the improvement (span between every kind of model of table is 30mm, span between every kind of model of chair is 20mm, wherein the span between 8-9 number is 10mm), be the supporting pedestal in lower end of each upright main support frame again, and the pedestal screw of the level altitude that is complementary of the lift adjustment screw on default and upright main support frame on the pedestal, again upright main support frame is installed in the pedestal of both sides, and then the method that adopts transposing lift adjustment screw and pedestal screw to connect, can have the different multiple model of set as required height to be implemented on a table and the chair, to adapt to not waiting and the ever-increasing use needs of health of student's height.
3. according to claim 1 and 2, it is characterized in that not only can making lift adjustment, but also can realize backrest point and the effectively dark work of seat surface are regulated as required the height of table and chair.
4. according to claim 1 and 2, it is characterized in that can allowing the student when writing, putting of forearm nature is put on the ancon at the attached ancon of each side establishing of desktop service orientation, loosen in order to bone, avoid forward lean, help proper sitting posture.
5. according to claim 1, it is characterized in that adopting little sense of shaking to make the prompting correcting signal, little chip that shakes is set in the device that corrects faulty sitting posture for this reason.When chest when sitting posture is bad or head touch photopic vision spacing chi, the interruption that the user will aware shake several seconds, the several seconds of the stopping sense of shaking that declines, this is little, and to shake sympathetic be that prompting please be corrected incorrect sitting-pose, after new line is squared one's shoulders, the sense of shaking promptly disappears, and makes the photopic vision angle that keeps suitable distance between eyes and reading and writing thing.
6. according to claim 1, it is characterized in that adopting making the transverse horizontal height of photopic vision spacing chi can make lift adjustment, so it is applicable to the student that height does not wait.Lift adjustment is to adopt in the upright plate lower end of photopic vision spacing chi spring eye to be set, install spring in the hole, again spring two is embedded steel ball, upright plate with photopic vision spacing chi lower end is installed in the abdominal cavity of the seat that corrects faulty sitting posture again, make the both sides steel ball that exposes turn and be arranged on the inboard waveform slide opening break-in about seat that corrects faulty sitting posture, realize that the cunning of lifting is smooth.
7. according to claim 1; it is characterized in that it being the guide rail that the steel ball system of employing is slided to be arranged on the book drawer top at desktop back and to rely on whole eyesight of guide rail carrying, bone protection to point out the device that corrects faulty sitting posture; and can be with outstanding the putting of whole rack device collection after folding in book drawer top; both safe certainly, do not influence again and put books, stationery in the book drawer.
8. according to claim 1, it is characterized in that after the seat that corrects faulty sitting posture goes to vertically, surely standing, be to adopt default Kong Zhongshe shock mount to embed steel ball, be fit in the default kiss hole of bead, a both sides that correct faulty sitting posture and realize steady upright when the seat that corrects faulty sitting posture goes to half steel ball that just in time makes the axle bed both sides expose spring when vertical in both sides axle bed upper end.
9. according to claim 1, it is characterized in that adopting on the preceding top of default steady rail wooden frame the locator that can turn to is set, locator is withstood shifting sledge, realize location as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130853 CN1457725A (en) | 2003-05-19 | 2003-05-19 | Sitting posture correcting desk and chair for vision and skeleton protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130853 CN1457725A (en) | 2003-05-19 | 2003-05-19 | Sitting posture correcting desk and chair for vision and skeleton protection |
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| Publication Number | Publication Date |
|---|---|
| CN1457725A true CN1457725A (en) | 2003-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03130853 Pending CN1457725A (en) | 2003-05-19 | 2003-05-19 | Sitting posture correcting desk and chair for vision and skeleton protection |
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| CN (1) | CN1457725A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103082664A (en) * | 2013-03-08 | 2013-05-08 | 李德胜 | Student nearsightedness prevention desk and chair with lifting device |
| CN105901927A (en) * | 2016-04-02 | 2016-08-31 | 佟建伦 | Vertical workbench |
-
2003
- 2003-05-19 CN CN 03130853 patent/CN1457725A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103082664A (en) * | 2013-03-08 | 2013-05-08 | 李德胜 | Student nearsightedness prevention desk and chair with lifting device |
| CN103082664B (en) * | 2013-03-08 | 2014-03-26 | 李德胜 | Student nearsightedness prevention desk and chair with lifting device |
| CN105901927A (en) * | 2016-04-02 | 2016-08-31 | 佟建伦 | Vertical workbench |
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