CN115381575A

CN115381575A - Movable direct-current dental therapy machine

Info

Publication number: CN115381575A
Application number: CN202211048998.3A
Authority: CN
Inventors: 周有为; 蒋丹
Original assignee: Best Dent Equipment Co ltd
Current assignee: Best Dent Equipment Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-25
Anticipated expiration: 2042-08-30
Also published as: CN115381575B

Abstract

The invention discloses a dental treatment machine, which relates to the technical field of dental treatment machines, in particular to a movable direct-current dental treatment machine, comprising a suitcase type treatment machine main body, wherein a direct-current driving mechanism is arranged in the treatment machine main body and is used for being connected with a direct-current power supply to provide power output, one side of the treatment machine main body is connected with a mobile power supply through a power line, the direct-current driving mechanism comprises a transformer, a water pump and a vacuum pump, a partition plate is arranged at the upper end of the treatment machine main body, an integrated plate is arranged at the lower end of the partition plate, a control panel is arranged on the inner side of a box cover and is electrically connected with the transformer, the water pump and the vacuum pump, and the movable direct-current dental treatment machine has the beneficial effects that: the telescopic support is pushed to stretch out or shrink by the telescopic adjusting mechanism, when the therapy apparatus is used, the telescopic support is driven to stretch out by the telescopic adjusting mechanism, so that the height of the therapy apparatus is adjusted, and meanwhile, the therapy apparatus is convenient to push away by the pulley arranged at the lower end of the telescopic support.

Description

Movable direct-current dental therapeutic machine

Technical Field

The invention relates to the technical field of dental treatment machines, in particular to a movable direct-current dental treatment machine.

Background

With the continuous development of technology, more and more intelligent devices are applied to oral medical treatment. Some existing mobile dc dental treatment machines are widely used because they are mobile, and generally include a box, a transformer, a motor, a water bottle, etc., wherein the transformer and the motor are directly mounted on a bottom plate of the box. However, although the existing mobile dc dental treatment machine can move, the box body is heavy because more devices are installed in the box body, so that two or more people are required to move in a matching manner when the machine is used every time, and the existing mobile dc dental treatment machine needs to be placed on a table top or a supporting plate when the machine is used, so that the mobility of the machine is greatly reduced. And equipment such as current dental drill, electronic polisher and water absorber, most buckles are installed in the inboard of box upper cover, the inboard at last top cap is hugged closely to the buckle, very be not convenient for like this get and put these equipment, influence medical personnel's work efficiency, and these buckles are comparatively simple, can't firmly fix these equipment after last top cap closes with the box lid, when removing the box, these equipment can follow the buckle in the landing takes place to rock to cause the damage of equipment. Traditional dental unit adopts the alternating current more, can't supply power to the therapy apparatus through portable power source, like this greatly reduced the applicable environment of therapy apparatus, and traditional dental drill passes through atmospheric pressure control, poor stability.

Disclosure of Invention

The present invention is directed to a mobile dc dental unit to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a portable direct current dental unit, includes portable box therapentic equipment main part, the inside of therapentic equipment main part is provided with direct current actuating mechanism for insert direct current power supply and provide power take off, just one side of therapentic equipment main part is passed through the power cord and is connected with portable power source, direct current actuating mechanism includes transformer, suction pump and vacuum pump, the baffle is installed to the upper end of therapentic equipment main part, the integrated board is installed to the lower extreme of baffle, control panel is installed to the inboard of case lid, just control panel and transformer, suction pump and vacuum pump electric connection, there is the case lid upper end of therapentic equipment main part through hinge connection, be connected through the buckle between case lid and the therapentic equipment main part, the inboard of case lid is rotated through the round pin axle and is connected with the concave frame, just the inboard welding of concave frame has the fixed plate, the side equidistance of fixed plate is provided with fixture, just inside electric polisher, water absorber and the gas blowing equipment of dental drill that are provided with respectively of fixture.

Preferably, the upper end of the inner cavity of the therapeutic machine body is provided with positioning grooves in bilateral symmetry, the side surface of the therapeutic machine body is provided with a sewage discharge outlet, a main switch is mounted on one side of the therapeutic machine body, and the output voltage of the mobile power supply is 30V-90V.

Preferably, the circular slot has been seted up to the upper end of baffle, and the interpolation of circular slot has connect the water-jug, and the water-jug leads to pipe and gas blowing equipment to be connected, water control knob and air control knob are installed to the upper end of baffle, and water control knob and air control knob respectively with control panel electric connection.

Preferably, the arc-shaped grooves are symmetrically formed in the left side and the right side of the concave frame, the pushing mechanisms are symmetrically arranged on the left side and the right side of the inner side of the box cover, the L-shaped blocks are symmetrically welded on the left side and the right side of the concave frame, and the L-shaped blocks are connected with the positioning grooves in a sliding mode.

Preferably, the inboard welding of concave frame has the fixed plate, the spacing groove has been seted up to the side equidistance of fixed plate, the left and right sides symmetry of spacing groove has seted up flutedly, the slot has been run through to the upper end of fixed plate, the micro-switch is installed to the inboard of slot, the joint has the water aspirator in the slot, spacing inslot is provided with the electronic polisher of dental drill and gas blowing equipment.

Preferably, the pushing mechanism comprises: arc pole and backstepping spring, the inboard bilateral symmetry welding of case lid has the arc pole, the cover is equipped with the backstepping spring on the arc pole, the one end of arc pole runs through arc wall and plectane welding, and arc pole and arc wall sliding connection.

Preferably, the clamping mechanism comprises: the clamping device comprises clamping blocks and U-shaped elastic pieces, wherein the clamping blocks are symmetrically arranged in the limiting groove in the left-right direction, the U-shaped elastic pieces are welded on the side faces of the clamping blocks, the clamping blocks are connected with the grooves in a sliding mode, and the side faces of the U-shaped elastic pieces are bonded with the grooves.

Preferably, the shrink groove has been seted up to the lower extreme of therapentic equipment main part, be provided with telescopic bracket in the shrink groove, telescopic bracket is last to install flexible adjustment mechanism, a pair of pulley is installed to telescopic bracket's lower extreme bilateral symmetry, flexible adjustment mechanism including: threaded rod, round bar and crank, the side threaded connection of driving plate has the threaded rod, the one end of threaded rod is passed the driving plate and is rotated with fixed frame and be connected, the other end welding of threaded rod has the round bar, the round bar rotates with fixed frame to be connected, the one end of round bar is passed shrink groove and crank welding.

Preferably, the telescopic bracket comprises: x-shaped expansion bracket, fixed frame, spout, gag lever post and driving plate, X-shaped expansion bracket is installed to the inboard bilateral symmetry in shrink groove, and fixed frame is installed to the upper and lower both ends symmetry of two X-shaped expansion brackets, and the fixed frame of one of them top welds with the upper end in shrink groove, and the lower extreme of the fixed frame of one of them below is connected through the pivot with the pulley, and the spout has been seted up to the left and right sides symmetry of two fixed frames, the side longitudinal symmetry welding of X-shaped expansion bracket has the gag lever post, and it is connected with the driving plate to rotate through the round pin axle between two X-shaped expansion brackets of bilateral symmetry distribution, the upper end sliding connection in driving plate and shrink groove, set up threaded hole is run through to the side of driving plate.

Preferably, the X-shaped expansion bracket is formed by rotationally connecting two supporting plates through a pin shaft, two ends of one supporting plate are symmetrically provided with protrusions, one ends of the two supporting plates are welded with a limiting rod, one ends of the two supporting plates, far away from the limiting rod, are rotationally connected with two fixed frames through the pin shaft, the limiting rod is in sliding connection with a sliding groove, and one end of the limiting rod, which is a circular column, is welded with a circular block.

Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:

1. the telescopic bracket is pushed to extend or contract by the arranged telescopic adjusting mechanism, when the therapy apparatus is used, the telescopic bracket is driven to extend by the telescopic adjusting mechanism, so that the height of the therapy apparatus is adjusted, and meanwhile, the therapy apparatus is convenient to push and move by the pulley arranged at the lower end of the telescopic bracket;

2. when the box cover at the upper end of the therapeutic machine main body needs to be opened, the box cover is turned upwards, after the box cover is opened, the concave frame is pushed to rotate under the action of the elastic force of a reverse pushing spring in the pushing mechanism, the concave frame rotates along the arc-shaped rod, the fixing plate and the clamping mechanism are driven to rotate through the concave frame, the therapeutic equipment is driven to move through the clamping mechanism, the therapeutic equipment is separated from the box cover, and therefore the therapeutic equipment is convenient to take and place;

3. the clamping mechanism is arranged to clamp and fix the electric dental drill grinding machine, the water absorber and other equipment, and the clamping block is pushed by the U-shaped elastic sheet to clamp and fix the equipment, so that the operation is simple and convenient, and meanwhile, the equipment can be firmly clamped and fixed, and the equipment is prevented from shaking randomly;

4. this application adopts direct current drive's transformer, suction pump and vacuum pump, makes the therapentic equipment can supply power through DC power supply such as portable power source, can be applicable to outdoor no environment of alternating current such as endowment community, field operations dental treatment to enlarged the applicable environment of therapentic equipment, supplied power to the dental drill through automatically controlled, improved the stability of dental drill.

Drawings

FIG. 1 is a schematic view of a dental unit according to the present invention;

FIG. 2 is a schematic view of the interior of the dental unit of the present invention;

FIG. 3 is a schematic view of the internal structure of the main body of the therapeutic apparatus of the present invention;

FIG. 4 is a schematic cross-sectional view of the lid structure of the present invention;

FIG. 5 is a schematic view of the concave shelf and clamping mechanism of the present invention;

FIG. 6 is a three-dimensional view of a dental unit according to the present invention;

FIG. 7 is a schematic cross-sectional view of the main body of the therapeutic apparatus of the present invention;

fig. 8 is a schematic structural view of the telescopic bracket of the invention.

In the figure: 1. a therapeutic machine main body; 11. a contraction groove; 12. positioning a groove; 13. a sewage draining outlet; 14. a transformer; 15. a water pump; 16. a vacuum pump; 17. a master switch; 18. a water bottle; 19. a mobile power supply; 2. a box cover; 21. a partition plate; 22. a water control knob; 23. a pneumatic control knob; 24. an integration plate; 25. a control panel; 3. an X-shaped telescopic frame; 31. a fixing frame; 32. a chute; 33. a limiting rod; 34. a drive plate; 35. a pulley; 4. a threaded rod; 41. a round bar; 42. a crank; 5. a concave frame; 51. an arc-shaped slot; 52. an arcuate bar; 53. a reverse-push spring; 54. an L-shaped block; 6. a fixing plate; 61. a limiting groove; 62. a groove; 63. a slot; 64. a micro switch; 7. a clamping block; 71. a U-shaped spring plate; 8. an electric grinding machine of a dental drill; 81. a water absorber; 82. and (4) air blowing equipment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 to 5, the present invention provides a technical solution: the utility model provides a portable direct current dental unit, includes portable box therapentic equipment main part 1, the inside of therapentic equipment main part 1 is provided with direct current drive mechanism for insert DC power supply provides power take off, just one side of therapentic equipment main part 1 is passed through the power cord and is connected with portable power source 19, portable power source 19's output voltage is 30V-90V, direct current drive mechanism includes transformer 14, suction pump 15 and vacuum pump 16, constant head tank 12 has been seted up to the upper end bilateral symmetry of therapentic equipment main part 1 inner chamber, the upper end of therapentic equipment main part 1 has case lid 2 through hinge connection, be connected through the buckle between case lid 2 and the therapentic equipment main part 1, drain 13 has been seted up to the side of therapentic equipment main part 1, transformer 14 is installed to the inboard of therapentic equipment main part 1, suction pump 15 and vacuum pump 16, baffle 21 is installed to the upper end of therapentic equipment main part 1, circular recess has circular recess, it has case lid 18 to peg graft in the circular recess, main switch 17 is installed to one side of therapentic equipment main part 1, water control knob 22 and air control knob 23 respectively with control knob 25, the lower extreme panel of baffle 21 installs case lid 24, vacuum pump panel 24, vacuum pump 15 and suction pump 15 pass through transformer 15 and vacuum pump electric connection electric power source, suction pump electric connection are through transformer 15 and vacuum pump electric connection, suction pump electric power source 15 and vacuum pump 16 respectively, vacuum pump electric connection.

The inboard of case lid 2 is connected with concave frame 5 through the round pin hub rotation, and the arc 51 has been seted up to the side bilateral symmetry of concave frame 5, and the inboard bilateral symmetry of case lid 2 is provided with pushing mechanism, and pushing mechanism is including: arc pole 52 and backstepping spring 53, the inboard bilateral symmetry welding of case lid 2 has arc pole 52, arc slot 51 and plectane welding are run through to the one end of arc pole 52, and arc pole 52 and arc slot 51 sliding connection, the cover is equipped with backstepping spring 53 on the arc pole 52, the one end of backstepping spring 53 is pegged graft with case lid 2, the other end of backstepping spring 53 is pegged graft with concave frame 5, backstepping spring 53 applys for elasticity to concave frame 5, when concave frame 5 rotated, concave frame 5 slided along river arc pole 52, thereby make the rotation that concave frame 5 can be stable.

The welding of the side bilateral symmetry of concave frame 5 has L-shaped piece 54, L-shaped piece 54 and constant head tank 12 sliding connection, when case lid 2 covers to therapentic machine main part 1 upset, L-shaped piece 54 is gone into along constant head tank 12 card, when case lid 2 continues to rotate downwards, concave frame 5 slides along arc pole 52, concave frame 5 pressurization reverse thrust spring 53 simultaneously, rethread buckle is fixed between with case lid 2 and therapentic machine main part 1, the inboard welding of concave frame 5 has fixed plate 6, spacing groove 61 has been seted up to the side equidistance of fixed plate 6, recess 62 has been seted up to the left and right sides symmetry of spacing groove 61, the side equidistance of fixed plate 6 is provided with fixture, fixture is including: grip block 7 and U-shaped shell fragment 71, bilateral symmetry is provided with grip block 7 in the spacing groove 61, the side welding of grip block 7 has U-shaped shell fragment 71, grip block 7 and recess 62 sliding connection, the side of U-shaped shell fragment 71 bonds with recess 62, the upper end of fixed plate 6 is run through and has been seted up slot 63, micro switch 64 is installed to the inboard of slot 63, it has water absorber 81 to have spliced in the slot 63, be provided with electric polisher 8 of dental drill and gas blowing equipment 82 in the spacing groove 61, the side equidistance of fixed plate 6 is provided with fixture, when needing to carry out centre gripping fixed to equipment such as electric polisher 8 of dental drill and gas blowing equipment 82, insert the lower extreme of equipment downwards along grip block 7, promote grip block 7 through the U-shaped shell fragment 71 that sets up and carry out centre gripping fixed to equipment, control panel 25 is used for controlling the rotational speed of electric polisher 8 of dental drill, water absorber 81 leads to the hose and is connected with water-jug 18.

Example two

Referring to fig. 6 to 8, a difference from the embodiment is: shrink groove 11 has been seted up to the lower extreme of therapentic equipment main part 1, is provided with telescopic bracket in the shrink groove 11, and telescopic bracket is including: the X-shaped telescopic frame 3, the fixed frames 31, the sliding grooves 32, the limiting rods 33 and the transmission plates 34, the X-shaped telescopic frame 3 is symmetrically arranged on the left and right sides of the inner side of the contraction groove 11, the fixed frames 31 are symmetrically arranged on the upper and lower ends of the two X-shaped telescopic frames 3, the fixed frame 31 above one of the two X-shaped telescopic frames is welded with the upper end of the contraction groove 11, the lower end of the fixed frame 31 below one of the two X-shaped telescopic frames is connected with the pulley 35 through a rotating shaft, the lower end of the telescopic bracket is symmetrically arranged on the left and right sides of the telescopic bracket, the sliding grooves 32 are symmetrically arranged on the left and right sides of the two fixed frames 31, the limiting rods 33 are symmetrically welded on the side surfaces of the X-shaped telescopic frame 3, the X-shaped telescopic frame 3 is formed by rotationally connecting two supporting plates through a pin shaft, the two ends of one of the supporting plate are symmetrically provided with convex parts, and one end of the two supporting plates is welded with the limiting rods 33, the equal round pin axle of one end of gag lever post 33 is kept away from to two backup pads and two fixed frames 31 are rotated and are connected, gag lever post 33 and spout 32 sliding connection, the one end welding that gag lever post 33 is a circular post has a circular block, it is connected with driving plate 34 to rotate through the round pin axle between two X-shaped expansion brackets 3 of bilateral symmetry distribution, driving plate 34 and shrink groove 11's upper end sliding connection, set up threaded hole is run through to driving plate 34's side, 3 contractions of X-shaped expansion bracket are when shrink groove 11, pulley 35 contracts equally in shrink groove 11, open when 3 upwards rotations of X-shaped expansion bracket, X-shaped expansion bracket 3 rotates along fixed frame 31, drive the fixed frame 31 rebound of top through X-shaped expansion bracket 3, fixed frame 31 drives 1 upward movement of therapy apparatus main part, thereby adjust the height of therapy apparatus main part 1, make things convenient for medical personnel to use.

Install flexible adjustment mechanism on the telescopic bracket, flexible adjustment mechanism is including: threaded rod 4, round bar 41 and crank 42, the side threaded connection of driving plate 34 has threaded rod 4, the one end of threaded rod 4 is passed driving plate 34 and is rotated with fixed frame 31 and be connected, the other end welding of threaded rod 4 has round bar 41, round bar 41 rotates with fixed frame 31 to be connected, the one end of round bar 41 is passed shrink slot 11 and is welded with crank 42, rotate crank 42, crank 42 drives round bar 41 and rotates, round bar 41 drives threaded rod 4 and rotates, threaded rod 4 drives driving plate 34 and removes, driving plate 34 drives X-shaped expansion bracket 3 and opens or the shrink.

The telescopic bracket is pushed to extend or contract through the arranged telescopic adjusting mechanism, when the therapeutic machine is used, the crank 42 is rotated, the crank 42 drives the round rod 41 to rotate, the round rod 41 drives the threaded rod 4 to rotate, the threaded rod 4 drives the transmission plate 34 to move forwards, the transmission plate 34 drives the X-shaped telescopic frame 3 to rotate upwards and open, meanwhile, the X-shaped telescopic frame 3 drives the limiting rod 33 to slide along the sliding chute 32, the therapeutic machine main body 1 is pushed to lift upwards through the X-shaped telescopic frame 3, so that the height of the therapeutic machine main body 1 is adjusted, and meanwhile, the therapeutic machine is convenient to push and move through the pulley 35 arranged at the lower end of the telescopic bracket; when the box cover 2 at the upper end of the therapeutic machine main body 1 needs to be opened, the box cover 2 is turned upwards, after the box cover 2 is opened, the concave frame 5 is pushed to rotate under the action of the elastic force of a reverse pushing spring 53 in the pushing mechanism, the concave frame 5 rotates along the arc-shaped rod 52, the fixed plate 6 and the clamping mechanism are driven to rotate through the concave frame 5, the therapeutic equipment is driven to move through the clamping mechanism, and the therapeutic equipment is moved out from the inner side of the box cover 2, so that the equipment is convenient to take and place; the clamping mechanism is used for clamping and fixing the electric dental drill grinding machine 8, the air blowing equipment 82 and other equipment, the equipment can be directly taken out of the clamping mechanism during use, when the clamping mechanism is fixed, the lower end of the equipment is downwards inserted along the clamping block 7, the clamping block 7 is pushed to clamp and fix the equipment through the arranged U-shaped elastic sheet 71, the operation is simple and convenient, meanwhile, the equipment can be clamped and fixed firmly, and the equipment is prevented from shaking randomly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a portable direct current dental unit, includes suitcase formula therapentic equipment main part (1), its characterized in that: the utility model discloses a medical instrument, including therapy apparatus main part (1), dc drive mechanism, suction pump (15), vacuum pump (16), baffle (21) are installed to the upper end of therapy apparatus main part (1), integrated board (24) are installed to the lower extreme of baffle (21), control panel (25) are installed to the inboard of case lid (2), just control panel (25) and transformer (14), suction pump (15) and vacuum pump (16) electric connection, there are case lid (2) upper end through hinge connection, be connected through the buckle between case lid (2) and therapy apparatus main part (1), the inboard of case lid (2) is connected with concave frame (5) through the round pin axle rotation, just the inboard welding of concave frame (5) has fixed plate (6), the side of fixed plate (6) is provided with fixture, and the equidistance fixture is inside to be provided with dental drill (8), water absorption machine (82) and the equipment of blowing respectively (81).

2. The mobile direct current dental unit of claim 1, wherein: the utility model discloses a portable power supply, including therapy apparatus main part (1), constant head tank (12) have been seted up to the upper end bilateral symmetry of therapy apparatus main part (1) inner chamber, drain (13) have been seted up to the side of therapy apparatus main part (1), just master switch (17) are installed to one side of therapy apparatus main part (1), the output voltage of portable power supply (19) is 30V-90V.

3. The mobile direct current dental unit of claim 1, wherein: circular recess has been seted up to the upper end of baffle (21), and circular recess interpolation has been connected with water-jug (18), and water-jug (18) pass through the water pipe and be connected with gas blowing equipment (82), water control knob (22) and air control knob (23) are installed to the upper end of baffle (21), and water control knob (22) and air control knob (23) respectively with control panel (25) electric connection.

4. The mobile direct current dental unit of claim 1, wherein: arc-shaped grooves (51) are symmetrically formed in the left side and the right side of the side face of the concave frame (5), pushing mechanisms are symmetrically arranged on the left side and the right side of the inner side of the box cover (2), L-shaped blocks (54) are symmetrically welded on the left side and the right side of the side face of the concave frame (5), and the L-shaped blocks (54) are connected with the positioning grooves (12) in a sliding mode.

5. The mobile direct current dental unit of claim 4, wherein: the inboard welding of concave frame (5) has fixed plate (6), spacing groove (61) have been seted up to the side equidistance of fixed plate (6), recess (62) have been seted up to the left and right sides symmetry of spacing groove (61), slot (63) have been seted up in running through to the upper end of fixed plate (6), micro-switch (64) are installed to the inboard of slot (63), the joint has water absorber (81) in slot (63), be provided with electric polisher (8) of dental drill and gas blowing equipment (82) in spacing groove (61).

6. The mobile DC dental unit of claim 4, wherein: the pushing mechanism comprises: arc pole (52) and backstepping spring (53), the inboard bilateral symmetry welding of case lid (2) has arc pole (52), the cover is equipped with backstepping spring (53) on arc pole (52), arc wall (51) and plectane welding are run through to the one end of arc pole (52), and arc pole (52) and arc wall (51) sliding connection.

7. The mobile dc dental unit of claim 1, wherein: the fixture includes: the clamping device comprises clamping blocks (7) and U-shaped elastic pieces (71), the clamping blocks (7) are symmetrically arranged in the limiting groove (61) in the left-right direction, the U-shaped elastic pieces (71) are welded on the side faces of the clamping blocks (7), the clamping blocks (7) are connected with the groove (62) in a sliding mode, and the side faces of the U-shaped elastic pieces (71) are bonded with the groove (62).

8. The mobile direct current dental unit of claim 1, wherein: shrink groove (11) have been seted up to the lower extreme of therapentic equipment main part (1), be provided with telescopic bracket in shrink groove (11), telescopic bracket is last to install flexible adjustment mechanism, a pair of pulley (35) are installed to telescopic bracket's lower extreme bilateral symmetry, flexible adjustment mechanism is including: threaded rod (4), round bar (41) and crank (42), the side threaded connection of driving plate (34) has threaded rod (4), the one end of threaded rod (4) is passed driving plate (34) and is rotated with fixed frame (31) and be connected, the other end welding of threaded rod (4) has round bar (41), round bar (41) rotates with fixed frame (31) to be connected, shrink slot (11) and crank (42) welding are passed to the one end of round bar (41).

9. The mobile direct current dental unit of claim 8, wherein: the telescopic bracket comprises: x-shaped expansion bracket (3), fixed frame (31), spout (32), gag lever post (33) and driving plate (34), X-shaped expansion bracket (3) are installed to the inboard bilateral symmetry of shrink groove (11), and fixed frame (31) are installed to the upper and lower both ends symmetry of two X-shaped expansion brackets (3), and the fixed frame (31) of one of them top welds with the upper end of shrink groove (11), and the lower extreme and pulley (35) of fixed frame (31) of one of them below are connected through the pivot, and spout (32) have been seted up to the left and right sides symmetry of two fixed frames (31), the side longitudinal symmetry welding of X-shaped expansion bracket (3) has gag lever post (33), is connected with driving plate (34) through the round pin hub rotation between two X-shaped expansion brackets (3) of bilateral symmetry distribution, driving plate (34) and the upper end sliding connection of shrink groove (11), the side of driving plate (34) runs through and sets up threaded hole.

10. The mobile direct current dental unit of claim 9, wherein: x-shaped expansion bracket (3) are connected through round pin axle rotation for two backup pads, and the both ends symmetry of one of them backup pad is provided with the bellying, and the one end of two backup pads all welds with gag lever post (33), and the one end that gag lever post (33) was kept away from in two backup pads is all sold round pin axle and is rotated with two fixed frames (31) and be connected, gag lever post (33) and spout (32) sliding connection, the welding of gag lever post (33) for the one end of a circular post has circular block.