CN114203010A - Endowment service is sand table show workstation for environment at home - Google Patents

Abstract

The invention discloses a sand table display workbench for an endowment service home environment, which comprises a box body and a platform body, wherein the bottom of the box body is provided with a groove, the inner wall of the groove is rotatably connected with two first reciprocating lead screws, the ends, close to each other, of the two first reciprocating lead screws are fixedly connected, the side walls of the two first reciprocating lead screws are in threaded connection with two sliding blocks, and the upper ends of the two sliding blocks are rotatably connected with a transverse plate through telescopic fences. According to the invention, the conducting plate can be contacted with the resistor strip through the shaking of the transverse plate, so that the electromagnetic valve is electrified, the flowing speed of hydraulic oil between the fixed cylinder, the first pipe and the oil storage tank can be hindered, the positions of the two buffer rods can not be changed excessively, the shaking of the transverse plate can be buffered, the stability of the transverse plate can be maintained, the damage of the connection part of the telescopic fence and the transverse plate caused by the long-time shaking of the transverse plate can be avoided, the service life of the telescopic fence can be shortened, the stability of the table body can be maintained, and the sand table can be protected.

Description

Endowment service is sand table show workstation for environment at home

Technical Field

The invention relates to the technical field of sand table display, in particular to a sand table display workbench for an old-age service home environment.

Background

The endowment service is social service which is based on a family as a core, a community as a support and specialized service as a support and is provided for the old who live at home and mainly solves the difficulty of daily life, wherein the home environment is important, and at present, when the endowment service project is recommended, a sand table display work table is required to be used for displaying the home environment.

At present when showing the sand table, in order to promote the bandwagon effect, can adjust the height of workstation through power conditioning equipment, but because power conditioning equipment can produce certain inertia in the twinkling of an eye stopping, thereby lead to the workstation shake easily, and the sand table all adopts mosaic structure in the present, when leading to shaking after the workstation long-time uses, can destroy putting in the sand table, influence its bandwagon effect, the shake of workstation also can lead to the fact the damage to the connecting piece between power conditioning equipment and the workstation simultaneously, thereby shorten its life, in addition, after the sand table is located external show, its surface can not avoid can the adhesion dust, at present often clean through the manual work, so not only intensity of labour is big, and still easily put in the sand table and cause the destruction.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a sand table display workbench for an old-fashioned service home environment.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sand table display workbench for an aging service home environment comprises a box body and a table body, wherein a groove is formed in the bottom of the box body, two first reciprocating lead screws are rotatably connected to the inner wall of the groove, one end of each first reciprocating lead screw, which is close to each other, is fixedly connected, two sliders are in threaded connection with the side wall of each first reciprocating lead screw, the upper ends of the two sliders are rotatably connected with a transverse plate through telescopic fences, the upper end of the transverse plate is connected with the table body through a balance mechanism, a buffer mechanism is arranged on the box body and comprises two fixed cylinders fixedly connected to the bottom of the box body, two buffer rods are in sealed sliding connection with the inner wall of each fixed cylinder, the upper ends of the two buffer rods are rotatably connected with the lower end of the transverse plate, an oil storage tank is installed at the lower end of the box body, the bottom of each fixed cylinder is communicated with the bottom of the oil storage tank through a first pipe, and a solenoid valve is installed in the first pipe, the improved structure of the power supply comprises a transverse plate, and is characterized in that a strip-shaped cavity is formed in the transverse plate, a current-conducting plate is connected to the inner wall of the strip-shaped cavity in a sliding mode in a sealing mode, two resistance strips are symmetrically embedded into the top of the strip-shaped cavity, the side wall of the current-conducting plate is elastically connected with the inner wall of the strip-shaped cavity through a first spring, one end of the current-conducting plate is in coupled connection with the positive electrode of an external power supply through a solenoid valve, one end, far away from the current-conducting plate, of each resistance strip is in coupled connection with the negative electrode of the external power supply, and a cleaning mechanism is arranged on a box body.

Preferably, the balance mechanism comprises a plurality of chutes arranged at the upper end of the transverse plate, the chutes are symmetrically arranged at the middle part of the transverse plate, the inner wall of each chute is connected with a supporting block in a sealing and sliding manner, the upper end of the supporting block is rotatably connected with the lower end of the table body, the lower end of the supporting block is elastically connected with the bottom of the chute through a second spring, and the inner wall of each chute is communicated with the inner wall of one side of the strip-shaped cavity close to the chute through a second pipe.

Preferably, clean mechanism is including seting up the clean groove in the box, clean inslot wall rotates and is connected with the reciprocal lead screw of second, the reciprocal lead screw lateral wall threaded connection of second has clean strip, clean strip adopts glass material to make, clean groove top and bottom all inlay and are equipped with chemical fibre cloth, clean strip lateral wall and the laminating of chemical fibre cloth lateral wall, box lateral wall fixedly connected with frame of induced drafting, the reciprocal lead screw one end of second runs through a plurality of impellers of box lateral wall and fixedly connected with, and is a plurality of the impeller is located the frame of induced drafting, the stage body upper end is inlayed and is equipped with a plurality of jet-propelled pipes, and is a plurality of the jet-propelled pipe mouth of pipe communicates with the frame inner wall of induced drafting.

Preferably, be equipped with actuating mechanism on the box, actuating mechanism includes first one-way bearing and the one-way bearing of second, the box lateral wall passes through support fixedly connected with motor, first one-way bearing inside wall and one of them first reciprocal lead screw lateral wall fixed connection, the one-way bearing inside wall of second and motor loose axle lateral wall fixed connection, the motor loose axle is through a plurality of connecting rods and the one-way bearing lateral wall fixed connection of second, first one-way bearing lateral wall fixedly connected with action wheel, the reciprocal lead screw lateral wall fixedly connected with of second follows the driving wheel, the action wheel passes through the hold-in range and is connected from the driving wheel.

Preferably, the box is internally provided with a conductive mechanism, the conductive mechanism comprises a connecting plate fixedly connected above the inner wall of the box, the lower end of the connecting plate is fixedly connected with a metal cylinder, the inner wall of the metal cylinder is connected with a metal rod in a sliding manner, the upper end of the metal rod is elastically connected with the top of the metal cylinder through a conductive spring, the side wall of the metal cylinder is connected with the ground through a wire, the conductive spring is coupled with a motor through a diode, and the inner wall of the box is fixedly connected with a collecting cylinder.

Preferably, the thread of the second reciprocating lead screw is provided with an insulating layer, and the side wall of the conductive spring is sleeved with a rubber sleeve.

Compared with the prior art, the invention has the advantages that:

1: through setting up buffer gear, the diaphragm shake makes the current conducting plate can contact with the resistor strip, thereby circular telegram on the solenoid valve can hinder the flow speed of hydraulic oil between a fixed cylinder-first pipe-batch oil tank, thereby keep the position of two buffer beam can not too much change, can cushion the shake on the diaphragm simultaneously, thereby keep the stability of diaphragm, avoid the long-time shake of diaphragm to make flexible fence and diaphragm junction damage, thereby shorten its life, also can keep the stability of stage body, protect the sand table.

2: through setting up balance mechanism, can guarantee the balanced stability of the stage body when the diaphragm shakes, ensure that the locating position of sand table can not change.

3: through setting up clean mechanism for the dust that the air-jet pipe blown the uplift that rises adsorbs to clean the strip, thereby separates empty clearance to the dust on the sand table, need not the manual work and clears up, avoids removing the damage to sand table locating place.

Drawings

Fig. 1 is a schematic structural view of a sand table display workbench for an endowment service home environment according to the present invention;

FIG. 2 is a schematic structural view of a horizontal plate and a table body of a sand table display workbench for the home environment of the endowment service provided by the invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1;

FIG. 4 is an enlarged view of the structure at B in FIG. 1;

fig. 5 is a schematic top view of a box body of a sand table display workbench for an old-fashioned service home environment according to the present invention.

In the figure: the device comprises a box body 1, a groove 2, a first reciprocating lead screw 3, a slide block 4, a telescopic fence 5, a transverse plate 6, a sliding chute 7, a supporting block 8, a table body 9, a second spring 10, a fixed cylinder 11, a buffer rod 12, an oil storage tank 13, a first pipe 14, a solenoid valve 15, a strip-shaped cavity 16, a conductive plate 17, a first spring 18, a resistor strip 19, a second pipe 20, a cleaning groove 21, a second reciprocating lead screw 22, a cleaning strip 23, chemical fiber cloth 24, a wind suction frame 25, an impeller 26, a jet pipe 27, a motor 28, a first one-way bearing 29, a second one-way bearing 30, a driving wheel 31, a driven wheel 32, a metal cylinder 33, a conductive spring 34, a metal rod 35, a lead 36 and a collecting cylinder 37.

Detailed Description

Referring to fig. 1-5, a sand table display workbench for an old-age service home environment comprises a box body 1 and a table body 9, further, a plurality of universal wheels are installed at the lower end of the box body 1, a groove 2 is formed at the bottom of the box body 1, the inner wall of the groove 2 is rotatably connected with two first reciprocating lead screws 3, one ends of the two first reciprocating lead screws 3 close to each other are fixedly connected, the side walls of the two first reciprocating lead screws 3 are in threaded connection with two slide blocks 4, the upper ends of the two slide blocks 4 are rotatably connected with a transverse plate 6 through a telescopic fence 5, the upper end of the transverse plate 6 is connected with the table body 9 through a balance mechanism, a buffer mechanism is arranged on the box body 1, the buffer mechanism comprises two fixed cylinders 11 fixedly connected at the bottom of the box body 1, the inner walls of the two fixed cylinders 11 are in a sealing and sliding connection with two buffer rods 12, the upper ends of the two buffer rods 12 are both rotatably connected with the lower end of the transverse plate 6, an oil storage tank 13 is installed at the lower end of the box body 1, fixed cylinder 11 bottom is through first pipe 14 and oil storage tank 13 bottom intercommunication, install solenoid valve 15 in the first pipe 14, strip chamber 16 has been seted up on diaphragm 6, the sealed sliding connection of the 16 inner walls in strip chamber has current conducting plate 17, the 16 top symmetry in strip chamber is inlayed and is equipped with two resistance strip 19, the current conducting plate 17 lateral wall is through first spring 18 and 16 inner wall elastic connection in strip chamber, current conducting plate 17 one end is passed through solenoid valve 15 and is connected with external power supply positive pole coupling, resistance strip 19 keeps away from current conducting plate 17 one end and is connected with external power supply negative pole coupling, be equipped with clean mechanism on the box 1.

It should be noted that the solenoid valve 15 is a normally open type solenoid valve, and when the horizontal plate 6 is kept horizontal, the conductive plate 17 is located between the two resistor strips 19, and the conductive plate 17 is not in contact with the two resistor strips 19, so that the solenoid valve 15 is opened without power supply.

Furthermore, hydraulic oil is arranged in the oil storage tank 13, when the transverse plate 6 moves upwards, the two buffer rods 12 are driven to move upwards at the moment, so that the hydraulic oil in the oil storage tank 13 enters the fixed cylinder 11 through the first pipe 14, when the transverse plate 6 moves upwards to the top and stops, the electric power equipment driving the first reciprocating lead screw 3 to rotate generates certain inertia, the transverse plate 6 correspondingly shakes, at the moment, the conductive plate 17 slides along the shaking direction of the transverse plate 6 in the strip-shaped cavity 16, namely, when the transverse plate 6 shakes rightwards, the conductive plate 17 slides rightwards, when the transverse plate 6 shakes leftwards, the conductive plate 17 slides leftwards, at the moment, the conductive plate 17 all contacts with the resistance strip 19, and the electromagnetic valve 15 is electrified;

because the opening degree of the electromagnetic valve 15 is in direct proportion to the magnitude of the current introduced into the electromagnetic valve, when the transverse plate 6 slightly shakes, the conductive plate 17 can be slightly contacted with the resistance strip 19, so that the current of the electromagnetic valve 15 in an access circuit is smaller, further the closing degree of the electromagnetic valve 15 is smaller, and at the moment, the electromagnetic valve can slightly obstruct the flow speed of hydraulic oil between the fixed cylinder 11, the first pipe 14 and the oil storage tank 13, so that the positions of the two buffer rods 12 cannot be changed too much, and meanwhile, the shaking on the transverse plate 6 can be buffered, and the stability of the transverse plate 6 is kept;

when diaphragm 6 acutely shakes, the current conducting plate 17 sliding distance is far away this moment, it can with the abundant contact of resistance strip 19, make the electric current in the solenoid valve 15 access circuit great, and then the degree of closing of solenoid valve 15 is great, solenoid valve 15 can hinder the flow velocity of hydraulic oil between solid fixed cylinder 11-first pipe 14-batch oil tank 13 greatly this moment, thereby keep the position of two buffer beam 12 again can not too much change, thereby keep diaphragm 6's stability again, avoid diaphragm 6 long-time shake to make telescopic fence 5 and diaphragm 6 junction damage, thereby shorten its life, also can keep the stability of stage body 9, protect the sand table.

The balance mechanism comprises a plurality of chutes 7 arranged at the upper end of the transverse plate 6, the chutes 7 are symmetrically arranged at the middle part of the transverse plate 6, the inner wall of each chute 7 is connected with a supporting block 8 in a sealing and sliding manner, the upper end of each supporting block 8 is rotatably connected with the lower end of the table body 9, the lower end of each supporting block 8 is elastically connected with the bottom of each chute 7 through a second spring 10, and the inner wall of each chute 7 is communicated with the inner wall of one side of the strip-shaped cavity 16 close to the chute through a second pipe 20.

Further, when diaphragm 6 trembles and makes current conducting plate 17 slide at bar chamber 16 inner wall, the space that is located current conducting plate 17 both sides in bar chamber 16 this moment all can change, and increase on one side reduces, and then bar chamber 16 can be through second pipe 20 to the spout 7 interior pump gas that slides and be close to with current conducting plate 17, make the supporting shoe 8 that is located this spout 7 move up, bar chamber 16 can inhale in the spout 7 that slides and keep away from with current conducting plate 17 through second pipe 20 simultaneously, and then the supporting shoe 8 that is located this spout 7 moves down, thereby can guarantee the balanced stability of stage body 9, ensure that the locating position of sand table can not change.

Clean mechanism is including seting up the clean groove 21 in box 1, clean groove 21 inner wall rotates and is connected with the reciprocal lead screw 22 of second, the reciprocal lead screw 22 screw thread department of second sets up the insulating layer, avoid the static outflow that produces on the clean strip 23, the reciprocal lead screw 22 lateral wall threaded connection of second has clean strip 23, clean strip 23 adopts glass material to make, clean groove 21 top and bottom are all inlayed and are equipped with chemical fiber cloth 24, clean strip 23 lateral wall and the laminating of chemical fiber cloth 24 lateral wall, box 1 lateral wall fixedly connected with air-sucking frame 25, the reciprocal lead screw 22 one end of second runs through box 1 lateral wall and a plurality of impeller 26 of fixedly connected with, a plurality of impeller 26 are located air-sucking frame 25, the upper end of stage body 9 is inlayed and is equipped with a plurality of jet-propelled pipes 27, a plurality of jet-propelled pipes 27 mouth of pipe and air-sucking frame 25 inner wall intercommunication.

Further, the reciprocal lead screw 22 of second rotates and makes clean strip 23 make a round trip to slide at clean 21 inner walls in groove, and then clean strip 23 can make a round trip to rub with chemical fiber cloth 24, make to exist static on the clean strip 23, the reciprocal lead screw 22 of second rotates and drives a plurality of impellers 26 and rotate simultaneously, and then external gas can blow out from platform body 9 upper end through jet-propelled pipe 27, thereby blow up the dust that exists on the sand table, and then contain static clean strip 23 and can adsorb the dust of raiseing, thereby separate the empty clearance to the dust on the sand table, need not the manual work and clear up, avoid removing the damage to sand table locating position.

Be equipped with actuating mechanism on the box 1, actuating mechanism includes first one-way bearing 29 and the one-way bearing 30 of second, the 1 lateral wall of box passes through support fixedly connected with motor 28, 29 inside walls of first one-way bearing and 3 lateral walls fixed connection of one of them first reciprocal lead screw, the one-way bearing 30 inside walls of second and motor 28 loose axle lateral wall fixed connection, the motor 28 loose axle is through a plurality of connecting rods and the 30 lateral walls fixed connection of the one-way bearing of second, 29 lateral walls fixedly connected with action wheel 31 of first one-way bearing, the reciprocal lead screw 22 lateral wall fixedly connected with of second follows driving wheel 32, action wheel 31 passes through the hold-in range and is connected with from driving wheel 32.

It should be noted that, when the motor 28 is fed with the forward current and rotates in the forward direction, the inner ring of the first one-way bearing 29 does not drive the outer ring thereof to rotate, the outer ring of the second one-way bearing 30 drives the inner ring thereof to rotate, when the motor 28 is fed with the reverse current and rotates in the reverse direction, the inner ring of the first one-way bearing 29 drives the outer ring thereof to rotate, the outer ring of the second one-way bearing 30 does not drive the inner ring thereof to rotate, and then the height of the table body 9 can be adjusted and the table body 9 can be cleaned through the forward rotation and the reverse rotation of the motor 28, so that a plurality of devices are not needed, and the volume and the use cost are reduced.

Be equipped with electrically conductive mechanism in the box 1, electrically conductive mechanism includes the connecting plate of fixed connection in 1 inner wall top of box, connecting plate lower extreme fixedly connected with metal cylinder 33, metal cylinder 33 inner wall sliding connection has metal pole 35, metal pole 35 upper end is through electrically conductive spring 34 and metal cylinder 33 top elastic connection, metal cylinder 33 lateral wall passes through wire 36 and is connected with ground, electrically conductive spring 34 lateral wall cover is equipped with the rubber sleeve, avoid communicateing between metal cylinder 33 and metal pole 35 and the electrically conductive spring 34, electrically conductive spring 34 passes through diode and motor 28 coupled connection, 1 inner wall fixedly connected with of box collects a section of thick bamboo 37.

Further, only allow reverse current to circulate in the secondary tube, namely when motor 28 counter-rotation, the shrink of circular telegram on conductive spring 34 this moment, and then metal rod 35 goes up the slip and keeps away from with cleaning strip 23, after motor 28 counter-rotation stopped, cleaning strip 23 can be located under metal rod 35 this moment, namely keep away from with stage 9, avoid influencing the promotion of stage 9, the outage extension on motor 28 makes conductive spring 34 go up this moment, and then metal rod 35 moves down and contacts with cleaning strip 23, and then lead out through the wire to the static on cleaning strip 23, make the dust on cleaning strip 23 drop in collecting vessel 37 under self action of gravity, thereby clear up on cleaning strip 23, be convenient for use next time.

In the invention, when the table body 9 is displayed, the driving motor 28 rotates in the forward direction, the outer ring of the second one-way bearing 30 drives the inner ring thereof to rotate, and then the two first reciprocating lead screws 3 are driven to rotate, so that the two sliding blocks 4 approach to each other, and further the two sliding blocks 4 drive the transverse plate 6 to move upwards through the telescopic fence 5, so as to drive the table body 9 to move upwards, when the table body 9 is completely moved out, the two sliding blocks 4 move to the mutually approaching thread positions from the mutually far thread positions of the two first reciprocating lead screws 3, and then the motor 28 is stopped to rotate;

the transverse plate 6 moves upwards to drive the two buffer rods 12 to move upwards, the two fixed cylinders 11 suck hydraulic oil from the oil storage tank 13 through the first pipe 14, when the transverse plate 6 shakes due to inertia generated by stopping rotation of the motor 28, the conductive plate 17 slides in the strip-shaped cavity to be in contact with the resistor strip 19 at the moment, so that the electromagnetic valve 15 is electrified, and the opening degree of the electromagnetic valve 15 is in direct proportion to the magnitude of current introduced into the electromagnetic valve 15, so that when the transverse plate 6 shakes slightly, the conductive plate 17 is in slight contact with the resistor strip 19 at the moment, the current of the electromagnetic valve 15 connected into a circuit is smaller, the closing degree of the electromagnetic valve 15 is smaller, the electromagnetic valve slightly obstructs the flowing speed of the hydraulic oil between the fixed cylinders 11 and the first pipe 14 and the oil storage tank 13, the positions of the two buffer rods 12 are kept from changing too much, and meanwhile, the shaking on the transverse plate 6 can be buffered, thereby maintaining the stability of the cross plate 6;

when the transverse plate 6 shakes violently, the current conducting plate 17 slides far away at the moment, and can be in full contact with the resistance strip 19, so that the current of the electromagnetic valve 15 in an access circuit is large, further the closing degree of the electromagnetic valve 15 is large, at the moment, the electromagnetic valve 15 can greatly hinder the flow speed of hydraulic oil among the fixed cylinder 11, the first pipe 14 and the oil storage tank 13, the positions of the two buffer rods 12 are kept from being changed too much again, the stability of the transverse plate 6 is kept again, the phenomenon that the connecting part of the telescopic fence 5 and the transverse plate 6 is damaged due to long-time shaking of the transverse plate 6 is avoided, the service life of the telescopic fence is shortened, the stability of the table body 9 is also kept, and the sand table is protected;

when the conducting plate 17 slides on the inner wall of the strip-shaped cavity 16, the spaces on both sides of the conducting plate 17 in the strip-shaped cavity 16 are changed, so that the strip-shaped cavity 16 pumps air through the second pipe 20 to the sliding chute 7 close to the conducting plate 17 in a sliding manner, the supporting block 8 in the sliding chute 7 moves upwards, meanwhile, the strip-shaped cavity 16 sucks air through the second pipe 20 to the sliding chute 7 far from the conducting plate 17 in a sliding manner, and the supporting block 8 in the sliding chute 7 moves downwards, so that the balance and stability of the table body 9 can be ensured, and the arrangement position of the sand table cannot be changed;

when the table body 9 needs to be retracted after being displayed, the motor 28 is driven to rotate in the forward direction again at the moment, and then the two first reciprocating lead screws 3 rotate again, so that the two sliding blocks 4 move from the mutually close threads of the two first reciprocating lead screws 3 to the mutually far threads, and the table body 9 returns to the initial position in the box body 1;

when the table body 9 needs to be cleaned, the driving motor 28 rotates in the reverse direction, and then the conductive spring 34 is electrified and contracted, so that the metal rod 35 is far away from the cleaning strip 23, and meanwhile, the motor 28 rotates to enable the inner ring of the first one-way bearing 29 to drive the outer ring thereof to rotate, so that the first one-way bearing 29 drives the second reciprocating lead screw 22 to rotate through the driving wheel 31, the synchronous belt and the driven wheel 32, and then the cleaning strip 23 slides back and forth on the inner wall of the cleaning groove 21, and then the cleaning strip 23 rubs back and forth with the chemical fiber cloth 24, so that static electricity exists on the cleaning strip 23, and simultaneously the second reciprocating lead screw 22 rotates to drive the plurality of impellers 26 to rotate, so that outside air can be blown out from the upper end of the table body 9 through the air injection pipe 27, thereby blowing up dust existing on the sand table, and then the cleaning strip 23 containing the static electricity can adsorb the raised dust, and after cleaning is completed, at this time, the cleaning strip 23 is in an initial state, that is to say, be located under metal pole 35 and keep away from with stage body 9, can stop rotating again on the motor 28 this moment, and then the outage extension on the conductive spring 34, and then metal pole 35 moves down and contacts with cleaning strip 23, and then leads out through the wire to the static on cleaning strip 23 for dust on the cleaning strip 23 drops in collecting vessel 37 under self action of gravity, thereby clears up on the cleaning strip 23, is convenient for use next time.

Claims (6)

1. The sand table display workbench for the home environment of the aging service comprises a box body (1) and a table body (9), and is characterized in that a groove (2) is formed in the bottom of the box body (1), the inner wall of the groove (2) is rotatably connected with two first reciprocating lead screws (3), two first reciprocating lead screws (3) are fixedly connected with one end close to each other, two first reciprocating lead screws (3) are in threaded connection with two sliders (4) on the side wall of each first reciprocating lead screw (3), two upper ends of the sliders (4) are rotatably connected with a transverse plate (6) through telescopic fences (5), the upper end of the transverse plate (6) is connected with the table body (9) through a balance mechanism, a buffer mechanism is arranged on the box body (1), the buffer mechanism comprises two fixed cylinders (11) fixedly connected to the bottom of the box body (1), and two buffer rods (12) are in sealed sliding connection with the inner walls of the fixed cylinders (11), the upper ends of the two buffer rods (12) are rotatably connected with the lower end of the transverse plate (6), the lower end of the box body (1) is provided with an oil storage tank (13), the bottom of the fixed cylinder (11) is communicated with the bottom of the oil storage tank (13) through a first pipe (14), an electromagnetic valve (15) is arranged in the first pipe (14), a strip-shaped cavity (16) is arranged on the transverse plate (6), the inner wall of the strip-shaped cavity (16) is connected with a conductive plate (17) in a sealing and sliding way, two resistance strips (19) are symmetrically embedded at the top of the strip-shaped cavity (16), the side wall of the conductive plate (17) is elastically connected with the inner wall of the strip-shaped cavity (16) through a first spring (18), one end of the conductive plate (17) is coupled and connected with the anode of an external power supply through an electromagnetic valve (15), one end, far away from the current-conducting plate (17), of the resistor strip (19) is in coupling connection with the negative electrode of an external power supply, and a cleaning mechanism is arranged on the box body (1).

2. The sand table display workbench for the aged service home environment as claimed in claim 1, wherein the balancing mechanism comprises a plurality of sliding grooves (7) formed in the upper end of the transverse plate (6), the sliding grooves (7) are symmetrically arranged in the middle of the transverse plate (6), the inner walls of the sliding grooves (7) are connected with supporting blocks (8) in a sealing and sliding manner, the upper ends of the supporting blocks (8) are rotatably connected with the lower end of the table body (9), the lower ends of the supporting blocks (8) are elastically connected with the bottoms of the sliding grooves (7) through second springs (10), and the inner walls of the sliding grooves (7) are communicated with the inner wall of one side of the bar-shaped cavity (16) close to the sliding grooves through second pipes (20).

3. The sand table display workbench for the aged service home environment as claimed in claim 1, wherein the cleaning mechanism comprises a cleaning groove (21) arranged in the box body (1), the inner wall of the cleaning groove (21) is rotatably connected with a second reciprocating screw rod (22), the side wall of the second reciprocating screw rod (22) is in threaded connection with a cleaning strip (23), the cleaning strip (23) is made of glass material, chemical fiber cloth (24) is embedded at the top and the bottom of the cleaning groove (21), the side wall of the cleaning strip (23) is attached to the side wall of the chemical fiber cloth (24), the side wall of the box body (1) is fixedly connected with an air suction frame (25), one end of the second reciprocating screw rod (22) penetrates through the side wall of the box body (1) and is fixedly connected with a plurality of impellers (26), the plurality of impellers (26) are arranged in the air suction frame (25), and a plurality of air injection pipes (27) are embedded at the upper end of the table body (9), the orifices of the plurality of air injection pipes (27) are communicated with the inner wall of the air suction frame (25).

4. The sand table display workbench for an endowment service home environment as claimed in claim 3, it is characterized in that a driving mechanism is arranged on the box body (1), the driving mechanism comprises a first one-way bearing (29) and a second one-way bearing (30), the side wall of the box body (1) is fixedly connected with a motor (28) through a bracket, the inner side wall of the first one-way bearing (29) is fixedly connected with the side wall of one first reciprocating screw rod (3), the inner side wall of the second one-way bearing (30) is fixedly connected with the side wall of a movable shaft of the motor (28), the movable shaft of the motor (28) is fixedly connected with the outer side wall of the second one-way bearing (30) through a plurality of connecting rods, the outer side wall of the first one-way bearing (29) is fixedly connected with a driving wheel (31), the side wall of the second reciprocating screw rod (22) is fixedly connected with a driven wheel (32), and the driving wheel (31) is connected with the driven wheel (32) through a synchronous belt.

5. The sand table display workbench for the aged service home environment as claimed in claim 4, wherein a conductive mechanism is arranged in the box body (1), the conductive mechanism comprises a connecting plate fixedly connected above the inner wall of the box body (1), a metal cylinder (33) is fixedly connected to the lower end of the connecting plate, a metal rod (35) is slidably connected to the inner wall of the metal cylinder (33), the upper end of the metal rod (35) is elastically connected to the top of the metal cylinder (33) through a conductive spring (34), the side wall of the metal cylinder (33) is connected with the ground through a wire (36), the conductive spring (34) is coupled with the motor (28) through a diode, and a collecting cylinder (37) is fixedly connected to the inner wall of the box body (1).

6. The sand table display workbench for the aged service home environment as claimed in claim 5, wherein an insulation layer is arranged at the thread of the second reciprocating lead screw (22), and a rubber sleeve is sleeved on the side wall of the conductive spring (34).

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