CN107296381B - Prevent the desk of clamp hand - Google Patents
Prevent the desk of clamp hand Download PDFInfo
- Publication number
- CN107296381B CN107296381B CN201710742127.4A CN201710742127A CN107296381B CN 107296381 B CN107296381 B CN 107296381B CN 201710742127 A CN201710742127 A CN 201710742127A CN 107296381 B CN107296381 B CN 107296381B
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- CN
- China
- Prior art keywords
- casing
- air
- desktop
- wind wheel
- table cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/08—Table tops; Rims therefor
- A47B13/081—Movable, extending, sliding table tops
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B41/00—School desks or tables
- A47B41/02—Adjustable, inclinable, sliding or foldable desks tops
Abstract
The invention discloses the desks for preventing clamp hand, including table cabinet and the desktop hinged with table cabinet, the piston pump of arc is connected between desktop and table cabinet, the lower section of piston pump is equipped with wind wheel organization, wind wheel organization includes bellows and wind wheel, wind wheel is rotatablely connected by first rotating shaft and bellows, is connected with the first guide duct between the exhaust valve and bellows of piston pump；The lower section of wind wheel organization is equipped with electromagnetic induction mechanism, and electromagnetic induction mechanism includes the conductive coil of bracket, two pieces of permanent magnets, inverter and U-shaped, is rotatably connected to the second shaft on bracket, and belt gear is equipped between first rotating shaft and the second shaft；The top of table cabinet is equipped with vertical casing and elastic balloon, and the second guide duct is connected between casing and bellows, and air-exhausting duct is communicated on casing, and air-exhausting duct is equipped with block, is connected with electromagnet on block, the permanent magnet that homopolarity is opposite therewith is installed with below electromagnet.Solve the problems, such as that desk is easy to jam a finger in the prior art.
Description
Technical field
The present invention relates to student's desk technical fields.
Background technique
Existing desk generally comprises table leg, the table cabinet of open top and lid conjunction in the desktop in table cabinet top portion, desktop and table
Cabinet is hinged.Student needs to be rotated up unlatching desktop when picking and placing the study articles such as books.After having picked and placed articles, by desktop
Lid closes at the top of table cabinet again again.Hinge connection, and the heavier-weight of desktop are generally used between desktop and table cabinet,
When lid closes desktop, desktop can accelerate to rotate under the effect of gravity, so that desktop be made to have biggish kinetic energy.When the hand of student
When finger is removed at the top of table cabinet not in time, it is easy to crush finger by the desktop of rapid decrease, to influence student
Study.The desk that designing one kind can prevent the hand of student to be pinched is highly desirable.
Summary of the invention
The invention is intended to provide a kind of desk for preventing clamp hand, it is easy to crush the hand of student to solve desk in the prior art
The problem of.
The desk for preventing clamp hand in this programme, the table cabinet including table leg and open top are hinged with table at the top of table cabinet
Plate is installed with the piston pump of arc on the table cabinet, and piston pump is equipped with intake valve and exhaust valve, and intake valve and exhaust valve are
Check valve, the center of circle of piston pump and the pivot center of desktop are conllinear, and the piston rod of piston pump is fixedly connected with desktop；The piston
The lower section of pump is equipped with wind wheel organization, and wind wheel organization includes bellows and wind wheel, and bellows are fixedly connected with table cabinet, and wind wheel is coaxially fixed to be connected
It is connected to first rotating shaft, first rotating shaft and bellows are rotatablely connected, and wind can be blown by being connected between the exhaust valve and bellows of piston pump
Take turns the first guide duct of rotation；The lower section of the wind wheel organization is equipped with electromagnetic induction mechanism, and the electromagnetic induction mechanism includes branch
Frame, two pieces of permanent magnets, inverter and U-shaped conductive coil, bracket is fixedly connected with table cabinet, be rotatably connected on bracket with
The second parallel shaft of first rotating shaft, two pieces of permanent magnets are centrosymmetric setting using the second shaft as center axis, and two pieces forever
Magnetic patch is heteropolar opposite and is fixedly connected with bracket, and conductive coil is installed in the second shaft, and both ends and the electric current of conductive coil change
To device Electricity Federation；Belt gear is equipped between the first rotating shaft and the second shaft；It is cut with scissors far from desktop at the top of the table cabinet
One end of contact is installed with vertical casing, and elastic balloon is fixedly connected at the top of casing, and elastic balloon is connected to casing, set
The second guide duct is connected between the lower end and bellows of pipe, the side of casing is communicated with lateral air-exhausting duct, and air-exhausting duct is equipped with
The tube wall of air-exhausting duct is run through in block, the upper end of block, and block is vertically slidably connected with air-exhausting duct, and the lower end of block is fixedly connected
There is the electromagnet of inverter Electricity Federation, the lower section of electromagnet is equipped with the opposite permanent magnet of homopolarity, permanent magnet are fixedly connected therewith
On table cabinet.
Working principle: when original state, elastic balloon is in unaerated state, and the upper end of block only has small part to protrude into row
In air hose.When opening desktop, it is mobile that desktop drives piston rod, so that piston pump be made to pass through intake valve air-breathing.When desktop closes
When closing, desktop pushes piston mobile by piston rod, and the air in piston pump is drained into the first wind-guiding by exhaust valve
In pipe, air enters in bellows through the first guide duct and wind wheel is pushed to rotate.Then air is entered through the second guide duct again
It is discharged in casing and from air-exhausting duct.For air when pushing wind wheel rotation, wind wheel drives first rotating shaft rotation, and first rotating shaft is logical
It crosses belt gear and drives the rotation of the second shaft, the second shaft drives conductive coil rotation, to make conductive coil cutting forever
The magnetic induction line of magnetic patch, and then the electric current generated in conductive coil.Electric current is transported on electromagnet by inverter, makes electricity
Magnet generates electromagnetic field.Since electromagnet is opposite with permanent magnet homopolarity, to generate repulsive force, push electromagnet on block
It moves, so that the air exhaust passage of air-exhausting duct be made to reduce.With the increase of the velocity of rotation of desktop, the speed that air is discharged in piston pump increases
Add, so that the wind speed in the first guide duct be made to increase, and then increases the velocity of rotation of wind wheel, to make first rotating shaft, second
The velocity of rotation of shaft also increases, and then increases the velocity of rotation of conductive coil also.It is conductive after the speed of conductive coil increases
The electric current generated in coil also increases, and then increases the electric current in electromagnet, and magnetic force caused by electromagnet increases, and makes electromagnetism
Iron continues to press on block and moves up, and further decreases the air exhaust passage of air-exhausting duct, increases the air pressure in casing, and then make in casing
Air push elastic balloon expansion, heave elastic balloon upwards and be higher by the top surface of table cabinet.When desktop touches elastic gas
When capsule, elastic balloon forms of short duration support to desktop, so that the velocity of rotation of desktop be made to decline, and then arranges piston pump
The velocity of rotation of the speed decline of air out, wind wheel and conductive coil also declines, so that the electric current for generating conductive coil reduces,
The electric current of electromagnet reduces, and magnetic force also reduces, and electromagnet and block move down under gravity, and the air exhaust passage of air-exhausting duct increases
Greatly, the air in casing and Accelerating Removal, so that the air in elastic balloon be made to be drained into casing.
Compared with prior art, it is the advantages of this programme: 1, by the way that the piston pump of arc is arranged, using desktop voluntarily
When closing, the velocity of rotation of desktop is increasing, so that the flow velocity for the air that piston pump is discharged is also increasing, thus
Increase the velocity of rotation of wind wheel and conductive coil also, the electric current for obtaining electromagnet also increases, and then electromagnet is made to push gear
Plate reduces the air exhaust passage of air-exhausting duct, expands elastic balloon, so that elastic balloon be made to be supported desktop, prevents desktop
Directly lid, which closes, crushes the finger of student at the top of table cabinet；2, after elastic balloon is supported desktop, the speed of desktop subtracts
It is small, and then block is made to reduce the barrier effect to the air exhaust passage of air-exhausting duct, make the air Accelerating Removal in casing, to make bullet
Air in property air bag enters in casing, reduces the volume of elastic balloon, when desktop is pressed on elastic balloon, bullet
The volume of property air bag starts to reduce, to reduce elastic balloon to the rebound effect of desktop, avoids desktop because of elastic balloon
Rebound and swing repeatedly occurs, thus be conducive to desktop quickly cover conjunction in table cabinet top portion.
Further, the permanent magnets are arc-shaped, and the center of circle of permanent magnets is located on the axis of the second shaft.Make conductor wire
Cutting magnetic induction line as vertical as possible is enclosed, to generate electric current.
Further, the elastic balloon is Nian Jie with casing.Elastic balloon is carried out with casing be bonded, can preferably make bullet
Property air bag is sealed with casing.
Further, the elastic balloon is Nian Jie with the inner wall of casing.Elastic balloon is Nian Jie with the inner wall of casing, elastic gas
During expansion, casing can limit the position of bonding capsule, thus what the bonding location for reducing elastic balloon destroyed
It may.
Further, the elastic balloon is made of rubber.Elastic balloon is made by using rubber, makes elastic balloon
Abundant raw materials, so as to reduce the cost of elastic balloon.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the desk embodiment that the present invention prevents clamp hand；
Fig. 2 is the structural schematic diagram of electromagnetic induction mechanism in Fig. 1.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description include: desktop 1, piston rod 21, cylinder body 22, the first guide duct 3, bellows 41,
First rotating shaft 42, wind wheel 43, permanent magnets 51, the second shaft 52, conductive coil 53, inverter 54, table cabinet 6, the second wind-guiding
Pipe 7, elastic balloon 8, casing 9, air-exhausting duct 10, block 11, electromagnet 12, permanent magnet 13.
The desk for preventing clamp hand as depicted in figs. 1 and 2, the table cabinet 6 including table leg and open top, table leg and table cabinet 6
It is fixedly connected.The top of table cabinet 6 is equipped with desktop 1, and the left part of desktop 1 is connect by hinge with table cabinet 6.The left part of table cabinet 6 is fixed
There is the piston pump of arc, the center of circle of piston pump is located on the pivot center of desktop 1.Piston pump includes cylinder body 22, piston and piston
Bar 21, cylinder body 22 are installed on table cabinet 6, and piston is located inside cylinder body 22, and one end of piston rod 21 is fixedly connected with the piston, piston
The other end of bar 21 is fixedly connected with desktop 1 by screw.With the rotation of desktop 1, desktop 1 pushes piston by piston rod 21
It is slided in cylinder body 22.The left end of cylinder body 22 is installed with intake valve and air outlet valve, and intake valve and air outlet valve are check valve.Cylinder body
22 lower section is equipped with 43 mechanism of wind wheel, and 43 mechanism of wind wheel includes bellows 41 and wind wheel 43, and first turn is rotatably connected in bellows 41
Axis 42, wind wheel 43 and 42 coaxial welding of first rotating shaft are installed with eight hinges, the plane and first rotating shaft 42 of hinge on wind wheel 43
Axis co-planar.The first guide duct 3 is equipped between the left side and air outlet valve on 41 top of bellows, the air outlet of the first guide duct 3
Central axes are vertical with the axis of first rotating shaft 42.The second guide duct 7 is installed on the right side of 41 top of bellows.The lower section of bellows 41 is set
There is electromagnetic induction mechanism, electromagnetic induction mechanism includes the bracket being installed on table cabinet 6, and the second shaft is rotatably connected on bracket
52, the second shaft 52 is arranged in parallel with first rotating shaft 42；It is installed with the permanent magnets 51 for the arc that two pieces are oppositely arranged on bracket, two
Block permanent magnets 51 are centrosymmetric setting using the axis of the second shaft 52 as center axis, and two pieces of permanent magnets 51 are heteropolar opposite；Second
The conductive coil 53 of U-shaped is installed in shaft 52, the axis co-planar of plane and the second shaft 52 where conductive coil 53.Second
An inverter 54 is installed in shaft 52.Belt gear is equipped between first rotating shaft 42 and the second shaft 52, the
Flat key is connected with drive pulley in one shaft 42, and flat key is connected with driven pulley in the second shaft 52, drive pulley and
Transmission belt is arranged on driven pulley.The right part of table cabinet 6 is equipped with vertical casing 9, and casing 9 is fixed on table cabinet 6 by pipe clamp
Side wall on.The top of 9 inner wall of casing is bonded with elastic balloon 8, and elastic balloon 8 is made of rubber, the lower end of elastic balloon 8 with
Casing 9 is connected to.The second guide duct 7 is connected between casing 9 and bellows 41.The left end of second guide duct 7 is connected to bellows 41, right
It holds and is connected to inside casing 9.The right side of casing 9 is communicated with lateral air-exhausting duct 10, and the lower part of air-exhausting duct 10 is equipped with block 11.Gear
The upper end of block 11 runs through the tube wall of air-exhausting duct 10 and extends to the inside of air-exhausting duct 10.Block 11 and the air-exhausting duct 10 vertically company of sliding
It connects.The lower end of block 11 is installed with electromagnet 12, electromagnet 12 and 54 Electricity Federation of inverter.The lower section of electromagnet 12 be equipped with
The opposite permanent magnet 13 of homopolarity, permanent magnet 13 is embedded on the side wall of table cabinet 6.
When original state, elastic balloon 8 is in unaerated state, and the upper end of block 11 only has small part to protrude into air-exhausting duct 10
It is interior.When opening desktop 1, it is mobile that desktop 1 drives piston rod 21, so that piston pump be made to pass through intake valve air-breathing.When desktop 1 closes
When closing, desktop 1 pushes piston mobile by piston rod 21, and the air in piston pump is drained into first by exhaust valve and is led
In air hose 3, air enters in bellows 41 through the first guide duct 3 and wind wheel 43 is pushed to rotate clockwise.Then air is again through the
Two guide ducts 7 are entered in casing 9 and are discharged from air-exhausting duct 10.When pushing wind wheel 43 to rotate, wind wheel 43 drives air
First rotating shaft 42 rotates, and first rotating shaft 42 drives the rotation of the second shaft 52 by drive pulley, transmission belt and driven pulley,
Second shaft 52 drives conductive coil 53 to rotate, to make the magnetic induction line of the cutting permanent magnets 51 of conductive coil 53, and then in conduction
Electric current is generated in coil 53.Electric current is transported on electromagnet 12 by inverter 54, and electromagnet 12 is made to generate electromagnetic field.By
It is opposite with 13 homopolarity of permanent magnet in electromagnet 12, to generate repulsive force, make electromagnet 12 that block 11 be pushed to move up, to make to arrange
The air exhaust passage of air hose 10 reduces.With the increase of the velocity of rotation of desktop 1, the speed that air is discharged in piston pump increases, thus
Increase the wind speed in the first guide duct 3, and then increase the velocity of rotation of wind wheel 43, to make 42, second turns of first rotating shaft
The velocity of rotation of axis 52 also increases, and then increases the velocity of rotation of conductive coil 53 also.After the speed of conductive coil 53 increases,
The electric current generated in conductive coil 53 also increases, and then increases the electric current in electromagnet 12, magnetic force caused by electromagnet 12
Increase, so that electromagnet 12 is continued to press on block 11 and move up, further decrease the air exhaust passage of air-exhausting duct 10, make the gas in casing 9
Pressure increases, and then expands the air push elastic balloon 8 in casing 9, and elastic balloon 8 is made to heave upwards and be higher by table cabinet 6
Top surface.When desktop 1 touches elastic balloon 8, elastic balloon 8 forms of short duration support to desktop 1, to make desktop 1
Velocity of rotation decline, and then make piston pump discharge air speed decline, the velocity of rotation of wind wheel 43 and conductive coil 53
Decline, so that the electric current for generating conductive coil 53 reduces, the electric current of electromagnet 12 reduces, and magnetic force also reduces, 12 He of electromagnet
Block 11 moves down under gravity, and the air exhaust passage of air-exhausting duct 10 increases, air and Accelerating Removal in casing 9, thus
It is drained into the air in elastic balloon 8 in casing 9.
Claims (5)
1. prevent the desk of clamp hand, the table cabinet including table leg and open top is hinged with desktop at the top of table cabinet, and feature exists
In: the piston pump of arc is installed on the table cabinet, piston pump is equipped with intake valve and exhaust valve, and intake valve and exhaust valve are
Check valve, the center of circle of piston pump and the pivot center of desktop are conllinear, and the piston rod of piston pump is fixedly connected with desktop；The piston
The lower section of pump is equipped with wind wheel organization, and wind wheel organization includes bellows and wind wheel, and bellows are fixedly connected with table cabinet, and wind wheel is coaxially fixed to be connected
It is connected to first rotating shaft, first rotating shaft and bellows are rotatablely connected, and wind can be blown by being connected between the exhaust valve and bellows of piston pump
Take turns the first guide duct of rotation；The lower section of the wind wheel organization is equipped with electromagnetic induction mechanism, and the electromagnetic induction mechanism includes branch
Frame, two pieces of permanent magnets, inverter and U-shaped conductive coil, bracket is fixedly connected with table cabinet, be rotatably connected on bracket with
The second parallel shaft of first rotating shaft, two pieces of permanent magnets are centrosymmetric setting using the second shaft as center axis, and two pieces forever
Magnetic patch is heteropolar opposite and is fixedly connected with bracket, and conductive coil is installed in the second shaft, and both ends and the electric current of conductive coil change
To device Electricity Federation；Belt gear is equipped between the first rotating shaft and the second shaft；It is cut with scissors far from desktop at the top of the table cabinet
One end of contact is installed with vertical casing, and elastic balloon is fixedly connected at the top of casing, and elastic balloon is connected to casing, set
The second guide duct is connected between the lower end and bellows of pipe, the side of casing is communicated with lateral air-exhausting duct, and air-exhausting duct is equipped with
The tube wall of air-exhausting duct is run through in block, the upper end of block, and block is vertically slidably connected with air-exhausting duct, and the lower end of block is fixedly connected
There is the electromagnet of inverter Electricity Federation, the lower section of electromagnet is equipped with the opposite permanent magnet of homopolarity, permanent magnet are fixedly connected therewith
On table cabinet.
2. the desk according to claim 1 for preventing clamp hand, it is characterised in that: the permanent magnets are arc-shaped, and permanent magnetism
The center of circle of block is located on the axis of the second shaft.
3. the desk according to claim 2 for preventing clamp hand, it is characterised in that: the elastic balloon is Nian Jie with casing.
4. the desk according to claim 3 for preventing clamp hand, it is characterised in that: the inner wall of the elastic balloon and casing is viscous
It connects.
5. the desk according to claim 4 for preventing clamp hand, it is characterised in that: the elastic balloon is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742127.4A CN107296381B (en) | 2017-08-25 | 2017-08-25 | Prevent the desk of clamp hand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742127.4A CN107296381B (en) | 2017-08-25 | 2017-08-25 | Prevent the desk of clamp hand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107296381A CN107296381A (en) | 2017-10-27 |
| CN107296381B true CN107296381B (en) | 2019-09-17 |
Family
ID=60132286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710742127.4A Active CN107296381B (en) | 2017-08-25 | 2017-08-25 | Prevent the desk of clamp hand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107296381B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108967464A (en) * | 2018-08-31 | 2018-12-11 | 张梦华 | A kind of electric dough-sheeter with hand clamping prevention function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234568A (en) * | 2014-09-30 | 2014-12-24 | 卢秋华 | Door structure capable of preventing hands from being pinched |
| CN105221517A (en) * | 2015-10-29 | 2016-01-06 | 重庆迎瑞升压铸有限公司 | Hot chamber die casting machine bounce cylinder |
| CN106761316A (en) * | 2016-12-16 | 2017-05-31 | 重庆名风家俱有限公司 | A kind of anticollision door |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060615B (en) * | 2017-04-01 | 2018-08-17 | 重庆坤秀门窗有限公司 | Door with automatic pinch resistant functionality |
-
2017
- 2017-08-25 CN CN201710742127.4A patent/CN107296381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234568A (en) * | 2014-09-30 | 2014-12-24 | 卢秋华 | Door structure capable of preventing hands from being pinched |
| CN105221517A (en) * | 2015-10-29 | 2016-01-06 | 重庆迎瑞升压铸有限公司 | Hot chamber die casting machine bounce cylinder |
| CN106761316A (en) * | 2016-12-16 | 2017-05-31 | 重庆名风家俱有限公司 | A kind of anticollision door |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107296381A (en) | 2017-10-27 |
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