阅读说明：本技术 一种印制电子喷墨打印机 (Printed electronic ink-jet printer ) 是由 梁敏 马可文 于 2020-06-28 设计创作，主要内容包括：本发明属于印制电子技术领域,具体的说是一种印制电子喷墨打印机,包括机架；所述机架顶端安装有纵向推杆,所述纵向推杆端部安装有横向推杆,所述横向推杆端部连接有升降推杆,所述升降推杆底端连接有打印喷头,所述机架内部连接有工作板,所述工作板底端连接有定位腔,所述定位腔底端的机架上连接有工作推杆,所述工作推杆顶端连接有支撑板,所述定位腔内部放置有一组用于喷墨印制的基板,所述机架一侧设有输送带；本发明通过设置的定位腔对基板进行定位,使得定位腔能够根据基板的长度进行适应性的匹配,增大了基板在定位时的灵活性与适用性,同时使得基板的打印更加连贯与快捷,大大提高了印制电子喷墨打印机的工作效率。(The invention belongs to the technical field of printed electronics, and particularly relates to a printed electronic ink-jet printer which comprises a rack; a longitudinal push rod is mounted at the top end of the rack, a transverse push rod is mounted at the end of the longitudinal push rod, a lifting push rod is connected to the end of the transverse push rod, a printing nozzle is connected to the bottom end of the lifting push rod, a working plate is connected to the inside of the rack, a positioning cavity is connected to the bottom end of the working plate, a working push rod is connected to the rack at the bottom end of the positioning cavity, a supporting plate is connected to the top end of the working push rod, a group of base plates for ink-jet printing is placed in the positioning cavity; the substrate is positioned by the positioning cavity, so that the positioning cavity can be adaptively matched according to the length of the substrate, the flexibility and the applicability of the substrate in positioning are improved, the substrate is printed more continuously and quickly, and the working efficiency of the printing electronic ink-jet printer is greatly improved.)

1. An electronic ink-jet printer for printing comprises a frame (1) and a printing nozzle (11) arranged on the frame (1); the method is characterized in that: a longitudinal push rod (12) is installed on one side of the top end of the rack (1), a transverse push rod (13) is installed on the end portion of the longitudinal push rod (12), a lifting push rod (14) is connected to the end portion of the transverse push rod (13), a printing nozzle (11) is connected to the bottom end of the lifting push rod (14), a driving push rod (15) is installed on the side end of the rack (1), a push plate (16) is connected to the end portion of the driving push rod (15), a working plate (17) is connected to the inside of the rack (1), a positioning cavity (2) with a rectangular cross section is connected to the bottom end of the working plate (17), the positioning cavity (2) is shaped into a funnel shape with a wide upper portion and a narrow lower portion, a working push rod (21) is connected to the bottom surface of the rack (1) corresponding to the bottom end of the positioning cavity (2, a set of base plate (3) that are used for the inkjet printing have been placed to location chamber (2) inside, the side department relative with drive push rod (15) is equipped with conveyer belt (4) on frame (1), the top surface of conveyer belt (4) flushes with the top surface of working plate (17) mutually, be equipped with the controller on frame (1), the controller is used for controlling ink jet printer's automatic operation.

2. A printed electronic ink jet printer according to claim 1, wherein: the symmetry is provided with spout (23) on the location chamber (2) side that drive push rod (15) lateral part corresponds, and location chamber (2) side department that spout (23) correspond is equipped with slide (5) of bending type, slide (5) comprise vertical locating plate (51) and regulating plate (52) of slope, the lateral wall of regulating plate (52) is laminated mutually with location chamber (2) inner wall of spout (23) department, just spout (23) inside sliding connection has fastening bolt (24), the inner of fastening bolt (24) passes regulating plate (52) threaded connection and has fastening nut (25).

3. A printed electronic ink jet printer according to claim 2, wherein: the inner wall middle part of locating plate (51) is connected with location strip (53) that the rubber material made, location strip (53) top flushes mutually with the top of locating plate (51), all set up on base plate (3) lateral wall with location strip (53) matched with constant head tank (31).

4. A printed electronic ink jet printer according to claim 3, wherein: the cross-sectional shape of location strip (53) sets up to semicircle shape, just constant head tank (31) and the shape phase-match of location strip (53).

5. A printed electronic ink jet printer according to claim 2, wherein: the positioning cavity (2) that the tip of drive push rod (15) corresponds side top has seted up drain hole (6), drain hole (6) bottom sliding connection has blowing board (61), can laminate mutually with backup pad (22) side when blowing board (61) inner slides in to positioning cavity (2) inside.

6. A printed electronic ink jet printer according to claim 5, wherein: the material placing plate (61) and the middle part of the top surface of the supporting plate (22) are respectively connected with a limiting strip (62), the material placing plate (61) and the limiting strip (62) on the supporting plate (22) are located on the same vertical surface, and limiting grooves (32) matched with the limiting strips (62) are formed in the middle part of the bottom surface of the base plate (3).

Technical Field

The invention belongs to the technical field of printed electronics, and particularly relates to a printed electronic ink-jet printer.

Background

The traditional printed circuit board usually adopts an inorganic silicon etching subtractive process, leads are formed through continuous corrosion, the production equipment is complex, the production period is long, the production cost is high, and a great amount of pollution is generated to the environment in the production process. With the development of science and technology, circuit boards have entered the printed electronics era. Printed electronics can be fabricated by various printing techniques into complex electronic circuits in which electronic components are combined with traces, and are therefore also referred to as "printed electronic circuits".

Among various printing techniques, the ink jet printing technique has attracted attention due to its advantages and maturity, and is widely used for printing electronic circuits. The electronic ink-jet printing system can make the printing nozzle spray the ink (such as nano silver ink) with conductivity onto the printing substrate under the action of the control system through the moving system, thereby forming an electronic circuit. In addition, printed electronic inkjet printing systems can also print arrays or large area electronic component circuits in large volumes as in conventional printers. The electronic printing ink-jet printer is mainly composed of a jet system, a motion system, an ink supply system, an ultraviolet curing system, an external heating system, a control system and other subsystems.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the printed electronic ink-jet printer, the substrate is positioned and printed by the arranged positioning cavity, so that the positioning cavity can be adaptively matched according to the length of the substrate, the flexibility and the applicability of the printer in positioning the substrate are increased, meanwhile, the printing of the substrate can be more continuous and quicker, and the working efficiency of the printed electronic ink-jet printer is greatly improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: a printed electronic ink-jet printer comprises a frame and a printing nozzle arranged on the frame; a longitudinal push rod is installed on one side of the top end of the rack, a transverse push rod is installed at the end of the longitudinal push rod, a lifting push rod is connected to the end of the transverse push rod, a printing nozzle is connected to the bottom end of the lifting push rod, a driving push rod is installed at the side end of the rack, a push plate is connected to the end of the driving push rod, a working plate is connected to the inside of the rack, a positioning cavity with a rectangular cross section is connected to the bottom end of the working plate, the positioning cavity is shaped into a funnel shape with a wide upper part and a narrow lower part, a working push rod is connected to the bottom surface of the rack corresponding to the bottom end of the positioning cavity, a supporting plate is connected to the top end of the working push rod through the bottom surface of the positioning cavity, a group of base plates for ink-jet, the rack is provided with a controller, and the controller is used for controlling the automatic operation of the ink-jet printer; when the ink-jet printer works, the efficiency of the ink-jet printer in the prior art is low, and although the printer can position the substrate when the substrate is printed, the flexibility and adaptability of the substrates with different sizes and specifications cannot be effectively matched; when the ink-jet printer is used, firstly, a group of substrate rows formed by aligning and arranging the substrates are placed in the positioning cavity from the cavity opening of the positioning cavity, so that the two side surfaces of the positioning cavity in the length direction can support and position the substrates between the positioning cavity and the positioning cavity, and the distance between the two side surfaces is gradually reduced from top to bottom due to the inclined arrangement of the two side surfaces of the positioning cavity, so that the two side surfaces can be suitable for the substrates with different lengths when supporting the substrates between the two side surfaces, and the flexibility and the applicability of the printer when positioning the substrates are improved; when the base plate needs ink-jet printing, the controller controls the working push rod to drive the support plate to move upwards, so that the support plate can push the base plate at the top end to move upwards, the bottom surface of the topmost base plate on the base plate row is flush with the top surface of the working plate, the longitudinal push rod, the transverse push rod and the lifting push rod which are arranged at the time can respectively drive the end parts of the longitudinal push rod, the transverse push rod and the lifting push rod to move in respective axial directions, the printing spray head can adjust the position of the base plate in a three-dimensional space under the action of the three push rods, so that the base plate can be effectively printed, and after the base plate is printed, the driving push rod at one side of the base plate pushes the base plate to the top surface of the conveying belt through the push plate at the end part, so that the base plate can quickly run to the next procedure at a, the printing of the substrate can be more continuous and rapid, so that the working efficiency of the printing electronic ink-jet printer is effectively improved.

Preferably, sliding grooves are symmetrically formed in the side face of the positioning cavity corresponding to the side portion of the driving push rod, a bending type sliding plate is arranged at the side face of the positioning cavity corresponding to the sliding grooves, the sliding plate is composed of a vertical positioning plate and an inclined adjusting plate, the side wall of the adjusting plate is attached to the inner wall of the positioning cavity at the sliding grooves, fastening bolts are slidably connected inside the sliding grooves, and the inner ends of the fastening bolts penetrate through the adjusting plate and are in threaded connection with fastening nuts; when the positioning cavity is in work, in order to further improve the positioning effect of the positioning cavity on the substrate, the sliding plate is arranged on the side surface of the positioning cavity, the sliding plate in an initial state is positioned at the top end position of the sliding groove, the substrate is prevented from being blocked when being placed in the positioning cavity, when the substrate is placed in the positioning cavity and is supported and positioned under the action of the side wall of the substrate, the adjusting plate on the sliding plate slides on the inner wall of the positioning cavity by pushing the sliding plate, meanwhile, the bottom ends of the positioning plates on the sliding plate can move to the position attached to the side surface of the substrate, the fastening nuts are screwed at the end parts of the fastening nuts, the adjusting plate can be firmly fixed on the inner wall of the positioning cavity, the two symmetrical positioning plates after being fixed can play a limiting effect on the substrate between the two positioning plates, and the movement deviation of the substrate generated under the driving of the supporting, the substrate is prevented from deviating towards the side wall direction of the two positioning cavities provided with the sliding grooves, so that the stability and the accuracy of the substrate during printing are effectively improved.

Preferably, the middle part of the inner wall of the positioning plate is connected with a positioning strip made of rubber materials, the top end of the positioning strip is flush with the top end of the positioning plate, and positioning grooves matched with the positioning strip are formed in the side wall of the base plate; the during operation, produce the skew to the axial direction of drive push rod when reducing the base plate and moving in location intracavity portion, place the constant head tank and the location strip of its tip in advance when locating intracavity portion this moment at the base plate, can be with location strip and the constant head tank looks block on the base plate when the locating plate is acted on to base plate one side afterwards, make the card play spacing effect to the motion of the vertical direction of base plate at the inside location strip of constant head tank, reduce the base plate and take place the circumstances of skew to the axial direction of drive push rod under the promotion of backup pad, thereby further improved the stability and the accuracy of base plate when printing, and after the base plate is printed and is accomplished, the base plate makes the constant head tank and the elastic location strip of side break away from under the effect of push pedal this moment, thereby make the propelling movement that the base plate can be smooth to carry out subsequent processing on the conveyer.

Preferably, the cross section of the positioning strip is in a semicircular shape, and the positioning groove is matched with the positioning strip in shape; the during operation, in order to make the location strip can relax effectual and constant head tank looks block more, this moment through setting up the shape of location strip and constant head tank, make the outer end opening of constant head tank bigger, make the outer end of location strip narrower simultaneously, thereby make the location strip can relax effectual and constant head tank looks block more, and after the completion is printed at the base plate, the inside roll-off of constant head tank from that this moment semi-cylindrical location strip can be more relaxed when the push pedal promotes the base plate, thereby there is stability and the validity of having improved ink jet printer when using greatly.

Preferably, a discharging hole is formed in the top end of the side face of the positioning cavity corresponding to the end portion of the driving push rod, a discharging plate is connected to the bottom end of the discharging hole in a sliding mode, and the inner end of the discharging plate can be attached to the side face of the supporting plate when sliding into the positioning cavity; the during operation, place in the location intracavity portion in order to make the base plate more convenient stable, place in advance on the blowing board that stretches out to the drain hole outer end through arranging the base plate this moment, later with backup pad propelling movement to the position department that flushes with the blowing board through the work push rod, promote the blowing board to fixing a position intracavity portion this moment and make its inner and backup pad side laminate mutually, later slide to the backup pad on from the blowing board through promoting the base plate row messenger, work push rod drives the base plate row downstream in the backup pad and carries out stable location under the effect of location chamber lateral wall afterwards, convenient and fast's while, also can reduce the base plate row and place the instability when fixing a position the intracavity portion.

Preferably, the middle parts of the top surfaces of the material placing plate and the supporting plate are respectively connected with a limiting strip, the material placing plate and the limiting strips on the supporting plate are positioned on the same vertical surface, and the middle part of the bottom surface of the substrate is provided with a limiting groove matched with the limiting strips; during operation, in order to make the base plate row can be more stable fix a position, this moment through in advance with spacing groove on the base plate with the spacing on the blowing board looks block, when the base plate row moves to the backup pad from the blowing board on, the spacing groove that the base plate was arranged can be stable transition to spacing department in the backup pad and block with it this moment, thereby make the middle part that the base plate was arranged the same to the location chamber lateral wall distance that the spout corresponds, prevent that the one end that the base plate was arranged from taking place collision and extrusion rather than the lateral wall at the in-process of location intracavity portion whereabouts location earlier, thereby make the base plate arrange the lateral wall can more stable whereabouts and simultaneously with the symmetrical both sides wall contact and the location in location chamber, thereby the effectual stability of base plate when fixing a position that.

The invention has the following beneficial effects:

1. according to the invention, the substrate is positioned and printed by the arranged positioning cavity, so that the positioning cavity can be adaptively matched according to the length of the substrate, the flexibility and the applicability of the printer in positioning the substrate are increased, the substrate can be printed more continuously and quickly, and the working efficiency of the printing electronic ink-jet printer is greatly improved.

2. According to the invention, the sliding plate is arranged on the side surface of the positioning cavity, so that the positioning plate on the sliding plate can limit the side wall of the substrate between the positioning plate and the sliding plate, the movement deviation of the substrate driven by the supporting plate is reduced, the substrate is prevented from deviating towards the side wall direction of the two positioning cavities with the sliding grooves, and the stability and the accuracy of the substrate during printing are effectively improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is a perspective view of a substrate according to the present invention;

in the figure: the printing device comprises a rack 1, a printing nozzle 11, a longitudinal push rod 12, a transverse push rod 13, a lifting push rod 14, a driving push rod 15, a push plate 16, a working plate 17, a positioning cavity 2, a working push rod 21, a supporting plate 22, a sliding groove 23, a fastening bolt 24, a fastening nut 25, a base plate 3, a positioning groove 31, a limiting groove 32, a conveying belt 4, a sliding plate 5, a positioning plate 51, an adjusting plate 52, a positioning strip 53, a discharging port 6, a discharging plate 61 and a limiting strip 62.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.

As shown in fig. 1-5, the electronic ink-jet printer for printing according to the present invention comprises a frame 1 and a print head 11 mounted on the frame 1; a longitudinal push rod 12 is installed on one side of the top end of the rack 1, a transverse push rod 13 is installed at the end of the longitudinal push rod 12, a lifting push rod 14 is connected to the end of the transverse push rod 13, a printing nozzle 11 is connected to the bottom end of the lifting push rod 14, a driving push rod 15 is installed at the side end of the rack 1, a push plate 16 is connected to the end of the driving push rod 15, a working plate 17 is connected to the inside of the rack 1, a positioning cavity 2 with a rectangular cross section is connected to the bottom end of the working plate 17, the positioning cavity 2 is shaped into a funnel shape with a wide upper part and a narrow lower part, a working push rod 21 is connected to the bottom surface of the rack 1 corresponding to the bottom end of the positioning cavity 2, a supporting plate 22 is connected to the top end of the working push rod 21 by penetrating through the bottom surface of the positioning cavity 2, the top surface of the conveying belt 4 is flush with the top surface of the working plate 17, and the rack 1 is provided with a controller for controlling the automatic operation of the ink-jet printer; when the ink-jet printer works, the efficiency of the ink-jet printer in the prior art is low, and although the printer can position the substrate 3 when printing, the flexibility and adaptability of the substrate 3 with different sizes and specifications cannot be effectively matched; when the ink-jet printer is used, firstly, a group of substrates 3 formed by aligning and arranging the substrates 3 is placed in the positioning cavity 2 from the cavity opening of the positioning cavity, so that the two side surfaces of the positioning cavity 2 in the length direction can support and position the substrates 3 between the two side surfaces, and the distance between the two side surfaces is gradually reduced from top to bottom due to the inclined arrangement of the two side surfaces of the positioning cavity 2, so that the two side surfaces can be suitable for the substrates 3 with different lengths when supporting the substrates 3 between the two side surfaces, and the flexibility and the applicability of the printer when positioning the substrates 3 are improved; when the substrate 3 needs ink-jet printing, the controller controls the working push rod 21 to drive the support plate 22 to move upwards, so that the support plate 22 can push the substrate 3 at the top end to move upwards, and the bottom surface of the topmost substrate 3 in the row of the substrates 3 is flush with the top surface of the working plate 17, and at this time, the longitudinal push rod 12, the transverse push rod 13 and the lifting push rod 14 which are arranged can respectively drive the end parts of the longitudinal push rod, the transverse push rod and the lifting push rod to move in respective axial directions, so that the printing spray head 11 can adjust the position of the substrate 3 in a three-dimensional space under the action of the three push rods, and the substrate 3 can be effectively printed, and after the substrate 3 is printed, the driving push rod 15 at one side of the substrate 3 pushes the substrate 3 to the top surface of the conveyer belt 4 through the push plate 16 at the end part, so that the substrate 3 can quickly run to the next procedure at high speed for processing, and meanwhile, the printing of the substrate 3 can be more continuous and rapid, so that the working efficiency of the printing electronic ink-jet printer is effectively improved.

As an embodiment of the present invention, sliding grooves 23 are symmetrically arranged on the side surfaces of the positioning cavities 2 corresponding to the side portions of the driving push rods 15, and bent sliding plates 5 are arranged at the side surfaces of the positioning cavities 2 corresponding to the sliding grooves 23, the sliding plates 5 are composed of vertical positioning plates 51 and inclined adjusting plates 52, the side walls of the adjusting plates 52 are attached to the inner walls of the positioning cavities 2 at the sliding grooves 23, fastening bolts 24 are slidably connected inside the sliding grooves 23, and the inner ends of the fastening bolts 24 are connected with fastening nuts 25 through the adjusting plates 52 by screw threads; in operation, in order to further improve the positioning effect of the positioning cavity 2 on the substrate 3, at this time, the sliding plate 5 is disposed on the side surface of the positioning cavity 2, so that the sliding plate 5 in the initial state is located at the top end position of the sliding groove 23, thereby preventing the substrate 3 from being obstructed when being placed inside the positioning cavity 2, and when the substrate 3 is placed inside the positioning cavity 2 and supported and positioned under the action of the side wall thereof, the adjusting plate 52 on the sliding plate 5 slides on the inner wall of the positioning cavity 2 by pushing the sliding plate 5, and simultaneously the bottom end of the positioning plate 51 on the sliding plate 5 can move to the position attached to the side surface of the substrate 3, at this time, the fastening nut 25 is screwed on the end portion of the fastening nut 25, so that the adjusting plate 52 can be firmly fixed on the inner wall of the positioning cavity 2, and at this time, the two symmetrical positioning plates 51 after being fixed can have a limiting effect on the, reduce the produced motion deviation of base plate 3 under the drive of backup pad 22, prevent that base plate 3 from taking place the skew to two location chamber 2 lateral wall directions that are provided with spout 23 to the effectual stability and the accuracy that have improved base plate 3 when printing.

As an embodiment of the present invention, a positioning strip 53 made of a rubber material is connected to the middle of the inner wall of the positioning plate 51, the top end of the positioning strip 53 is flush with the top end of the positioning plate 51, and positioning grooves 31 matched with the positioning strip 53 are formed on the side walls of the base plate 3; in operation, in order to reduce the deviation of the substrate 3 in the axial direction of the driving rod 15 when moving in the positioning cavity 2, the positioning slot 31 at the end of the substrate 3 is aligned with the positioning bar 53 when the substrate 3 is placed in the positioning cavity 2, and then the positioning bar 53 can be engaged with the positioning slot 31 on the substrate 3 when the positioning plate 51 acts towards the substrate 3 side, so that the positioning strip 53 clamped in the positioning slot 31 can limit the vertical movement of the substrate 3, reduce the axial deviation of the substrate 3 to the driving push rod 15 under the pushing of the supporting plate 22, thereby further improving the stability and accuracy of the substrate 3 during printing, and after the substrate 3 is printed, at this time, the substrate 3 is separated from the positioning groove 31 on the side surface and the elastic positioning strip 53 under the action of the push plate 16, so that the substrate 3 can be smoothly pushed onto the conveying belt 4 for subsequent processing.

As an embodiment of the present invention, the cross-sectional shape of the positioning strip 53 is set to be a semicircular shape, and the positioning groove 31 matches with the shape of the positioning strip 53; the during operation, in order to make location strip 53 can relax effectual and constant head tank 31 looks block more, this moment through setting up the shape of location strip 53 and constant head tank 31, make the outer end opening of constant head tank 31 bigger, make the outer end of location strip 53 narrower simultaneously, thereby make location strip 53 can relax effectual and constant head tank 31 looks block more, and print the completion back at base plate 3, this moment semi-cylindrical location strip 53 can be at push pedal 16 when promoting base plate 3 the inside roll-off of constant head tank 31 of more light, thereby there is stability and the validity of having improved ink jet printer when using greatly.

As an embodiment of the present invention, a discharge hole 6 is formed at the top end of the side surface of the positioning cavity 2 corresponding to the end of the driving push rod 15, the bottom end of the discharge hole 6 is connected to a discharge plate 61 in a sliding manner, and the inner end of the discharge plate 61 can be attached to the side surface of the supporting plate 22 when sliding into the positioning cavity 2; during operation, in order to make the base plate 3 can be more convenient stable place inside location chamber 2, place in advance on stretching out the blowing board 61 to the drain hole 6 outer end through arranging base plate 3 this moment, later through work push rod 21 with backup pad 22 propelling movement to the position department that flushes with blowing board 61, promote blowing board 61 to fix a position 2 inside slip and make its inner and backup pad 22 side laminate this moment, later through promoting base plate 3 row make it slide to backup pad 22 on from blowing board 61, work push rod 21 drives base plate 3 row downstream on the backup pad 22 and carries out stable location under the effect of location chamber 2 lateral walls afterwards, convenient and fast's the while, also can reduce the base plate 3 row and place the instability when fixing a position 2 insidely.

As an embodiment of the present invention, the material placing plate 61 and the middle part of the top surface of the supporting plate 22 are respectively connected with a limiting strip 62, the material placing plate 61 and the limiting strip 62 on the supporting plate 22 are located on the same vertical surface, and the middle part of the bottom surface of the substrate 3 is provided with a limiting groove 32 matched with the limiting strip 62; in operation, in order to make 3 rows of base plates can be more stable fix a position, this moment through in advance with spacing groove 32 on 3 with put the flitch 61 on spacing strip 62 looks block, when 3 rows of base plates move from putting flitch 61 to backup pad 22 on, 3 rows of spacing groove 32 of base plates can stable transition to the spacing strip 62 department on backup pad 22 and block with it this moment, thereby make the middle part of 3 rows of base plates to 2 lateral walls of location chamber that spout 23 corresponds apart from the same, prevent that 3 rows of one end of base plates from taking place collision and extrusion with its lateral wall earlier in the inside whereabouts in-process of location chamber 2, thereby make 3 rows of lateral walls of base plates can more stable whereabouts and with the symmetrical both sides wall contact and the location of location chamber 2 simultaneously, thereby the effectual stability of base plate 3 when fixing a position that has improved.

When the device works, the breathing air pipe 1 and the pharyngeal suction pipe 11 inserted into the breathing air pipe are inserted into the oral cavity of a patient, so that the breathing air pipe 1 has a normal breathing assistance effect on the patient, when the pharyngeal of the patient produces secretion such as phlegm, the controller controls the electromagnet 41 to work and applies acting force to the sealing plate 42 on one side, so that the two sealing plates 42 move towards one side of the inner conversion cavity 3 under the action of the electromagnet 41 until the two sealing plates 42 move into the annular cavity between the outer conversion cavity 2 and the inner conversion cavity 3 and block the annular cavity, so that the breathing air pipe 1 between the outer conversion cavity 2 and the working end fails under the blocking effect of the sealing plate 42, the controller controls the air supply device to apply negative pressure to the inner end of the breathing air pipe 1 through the air supply pipe 44, and because the side surface of the sealing plate 42 moves to the side wall of the inner conversion cavity 3, at the moment, a port of a communicating pipe 45 corresponding to the side wall of the inner conversion cavity 3 on the, at the moment, the inner end of the breathing tube 1 applies negative pressure to the pharyngeal suction tube 11 connected with the internal conversion cavity 3 through the ventilation circuit, so that the working end of the pharyngeal suction tube 11 absorbs and cleans sputum in the oral cavity of a patient under the action of the internal negative pressure, and the secondary damage to the oral cavity of the patient caused by repeated installation of the breathing tube 1 is reduced while convenience and rapidness are realized, so that the cleaning quality and the cleaning efficiency of oral secretion of the patient are greatly improved; meanwhile, when the locking structure 5 is installed in cooperation with the outer conversion cavity 2, firstly, the outer locking cavity 51 is aligned with the outer conversion cavity 2, and the locking plate 53 is inserted into the guide port 23 of the locking ring 22 through the guide groove 24, at this time, the locking ring 22 inside the locking groove 21 is rotated, so that the ring body of the locking ring 22 is inserted into the clamping groove 54 and the locking plate 53 is fixed, and the breathing air tube 1 and the pharyngeal suction tube 11 on the locking structure 5 respectively work in a movable connection mode with the outer conversion cavity 2 and the inner conversion cavity 3, so that the working ends of the damaged breathing air tube 1 and the pharyngeal suction tube 11 are flexibly replaced, and the flexibility and the practicability of the suction catheter during use are greatly improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.