Multifunctional negative pressure suction device

Abstract

The multifunctional negative pressure suction device comprises a holding pipe, a protective cover cylinder, a fixing cylinder, an arc-shaped swing assembly and a telescopic material pumping assembly, a negative pressure pump is installed at the top end of the holding pipe, a communicating hose and a communicating straight pipe which communicate with the negative pressure pump are arranged in the holding pipe, and the fixing cylinder is installed in the protective cover cylinder arranged at the lower end of the holding pipe; the telescopic material pumping assembly is installed in the fixed cylinder, the arc-shaped swing assemblies are symmetrically installed on the two sides of the fixed cylinder and connected with the negative pressure pump through communicating hoses, each arc-shaped swing assembly comprises a fixed bin, a swing arm, a butt-joint arc plate and a soft suction cup, and the fixed bins are symmetrically installed on the front side and the rear side of the fixed cylinder; one end of the swing arm is installed on the fixed bin, the other end of the swing arm is installed on the butt-joint arc plate, the soft suction cup is installed on the butt-joint arc plate and connected with the communicating hose, the device is rich in function, all the structures can be matched and driven mutually, and the operation requirements of medical experiments and fine industry can be well met.

Description

Technical Field

[0001] The present invention relates to the technical field of object-taking auxiliary appliances, and in particular to a multifunctional negative pressure suction device. Background Art

[0002] In medical experiments and fine industrial operations, it is often necessary to grab and transfer some thin slices with smooth and clean surfaces. These slices are fragile and difficult to grab using conventional grippers, and require a negative pressure suction head connected to an air pump for grabbing.

[0003] The patent with publication number CN114803507A discloses a sheet suction device, which includes a clamping head inner core, an air needle, a first slide groove and a second slide groove, one end of the second slide groove is provided with a second slide groove hole, and the second slide groove is nested in the outer side of one end of the first slide groove through the second slide groove hole, the outer side of the first slide groove is the outer surface of the first slide groove, and the first slide groove is provided inside the first slide groove, in which the first slide groove is provided with a first slide groove, the clamping head head, the clamping head inner core and the outer side of the clamping head tail of the clamping air needle, the fixed cover is fixed in the first slide groove, and a preload spring is provided between the clamping head tail and the fixed cover, so that part of the impact force when the air needle directly contacts the sheet object is converted into elastic potential energy of the preload spring, and the hard contact is converted into soft contact, when the impact force is large, the elastic force of the preload spring will cause the first slide groove and its internal components to slide in the second slide groove hole, converting the elastic potential energy into gravity potential energy, avoiding the air needle from causing damage to the sheet object, which is beneficial to the suction of the sheet object.

[0004] However, the adsorption head of the device has a relatively single function, and long-term exposure to the outside of the device is prone to contamination and damage. For this reason, we proposed a multifunctional negative pressure suction device. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a multifunctional negative pressure suction device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A multifunctional negative pressure suction device comprises a gripping tube, a protective cover tube, a fixed tube, an arc-shaped swinging assembly and a telescopic material extraction assembly. A negative pressure pump is installed at the top of the gripping tube, a connecting hose and a connecting straight pipe connected to the negative pressure pump are arranged in the gripping tube, the fixed tube is installed in the protective cover tube arranged at the lower end of the gripping tube, and is connected to the negative pressure pump through the connecting straight pipe, the telescopic material extraction assembly is installed in the fixed tube, and the arc-shaped swinging assembly is symmetrically installed on both sides of the fixed tube, and is connected to the negative pressure pump through the connecting hose;

[0008] The arc swing assembly includes a fixed bin, a swing arm, an arc-jointing plate and a soft suction cup. The fixed bin is symmetrically mounted on the front and rear sides of the fixed cylinder. One end of the swing arm is mounted on the fixed bin and the other end is mounted on the arc-jointing plate. The soft suction cup is mounted on the arc-jointing plate and connected to the connecting hose.

[0009] The telescopic extraction assembly includes a spring tube and a sleeve head. The sleeve head is sleeved and installed on the lower end of the connecting straight tube. The sleeve head is hollow inside. One end of the spring tube is installed on the sleeve head and is connected to the inside of the sleeve head. The sleeve head can be switchably connected to the connecting straight tube.

[0010] Preferably, the telescopic extraction assembly includes a spring tube and a sleeve head, the sleeve head is sleeved and installed on the connecting straight tube, one end of the spring tube is installed on the sleeve head and is connected to the inside of the sleeve head, and the fixed tube has a limiting channel inside that allows the sleeve head to move up and down, and the connecting straight tube passes through the fixed tube up and down and extends from the bottom of the fixed tube.

[0011] Preferably, the sleeve head can only move vertically in the limiting channel and is restricted but cannot rotate axially. The interior of the sleeve head is divided into an upper cavity and a lower cavity that are not connected to each other by an isolation plate. A threaded collar is rotatably installed in the upper cavity. The outer part of the connecting straight pipe wrapped by the fixed tube has threads. A micro drive motor is installed in the upper cavity, and the micro drive motor can drive the threaded collar to rotate axially.

[0012] Preferably, a connecting window is provided near the bottom end of the connecting straight pipe. Under normal circumstances, the connecting window is closed by a closed switching component arranged in the connecting straight pipe. The closed switching component includes a fixing ring, a reset spring, a sealing rotating plate and a sealing ring plate. The fixing ring is fixedly installed on the inner side wall of the connecting straight pipe above the connecting window. The upper end of the reset spring is connected to the fixing ring, and the lower end is connected to the sealing ring plate. The sealing ring plate passes through from top to bottom and is arranged tightly against the inner side wall of the connecting straight pipe. When the reset spring is at a normal length, the sealing ring plate is in a position to completely close the connecting window. A corresponding window is provided in the lower cavity, which is tightly against the side wall of the connecting straight pipe. The downward movement of the sleeve head can make the corresponding window correspond to the connecting window.

[0013] Preferably, the sealing rotating plate is installed on the upper part of the sealing ring plate. When the sealing rotating plate is rotated to a horizontal state, the horizontal cross-section of the sealing ring plate can be closed. Flip rotating shafts are symmetrically arranged on both sides of the sealing rotating plate. The flip rotating shafts can rotatably penetrate the sealing ring plate and pass through a tooth guide rail vertically opened on the side wall of the connecting straight tube. One side row of teeth is arranged on the tooth guide rail, and the outer peripheral wall of the flip rotating shaft has a tooth ring meshing with the tooth row of teeth of the tooth guide rail.

[0014] Preferably, the fixed warehouse includes an outer warehouse shell, a belt rotating motor, a gear plate, a fixed ruler and a linkage. The belt rotating motor is fixedly installed at the upper end of the outer warehouse shell. The belt rotating motor is controlled to drive the threaded sleeve that is threadedly matched with the threaded rod installed at the lower end to rotate after power is turned on. The outer warehouse shell has a space inside to allow the threaded rod to be inserted after it moves up.

[0015] Preferably, the linkage is installed at the lower end of the threaded rod, the outer housing shell has a vertically extending guide groove, and the swing arm horizontally penetrates the guide groove and is coaxially connected to the toothed disc arranged in the outer housing shell.

[0016] Preferably, the linkage member shaft is installed at the center of the gear plate shaft, and the linkage member is fixedly installed at the lower end of the threaded rod, and the fixed ruler is vertically installed on one side of the gear plate and meshes with the gear plate. When the gear plate moves up and down with the threaded rod, it will rotate due to the engagement with the fixed ruler.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can use the through port connected to the bottom end of the straight tube to pick up objects under negative pressure, and can also move the telescopic extraction component out of the fixed tube and pull out the spring tube to suck waste. It can also use the combinable arc-shaped swing component to perform rolling sealing operations after the combination is completed. The device has rich functions, and the various structures can cooperate with each other, which can well meet the operational needs of medical experiments and fine industries.

[0019] 2. The connecting straight pipe, telescopic extraction assembly and arc-shaped swing assembly of the present invention can be effectively protected by the protective cover tube after use, will not be exposed to the outside of the device for a long time, are not easily contaminated and damaged, and better meet and comply with the operational needs of medical experiments and fine industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a multifunctional negative pressure suction device according to the present invention when performing negative pressure picking up;

[0022] Figure 2 It is a schematic structural diagram of a multifunctional negative pressure suction device according to the present invention when sucking waste;

[0023] Figure 3This is a schematic diagram of the internal structure of a multifunctional negative pressure suction device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the fixed bin according to the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the fixing cylinder of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the telescopic material extraction assembly of the present invention;

[0027] Figure 7 It is a detailed schematic diagram of the installation location of the flip shaft described in the present invention.

[0028] In the figure: 1, holding tube; 101, connecting window; 102, tooth guide rail; 11, negative pressure pump; 12, connecting hose; 13, connecting straight pipe; 14, closed switching component; 141, fixing ring; 142, reset spring; 143, sealing rotating plate; 144, sealing ring plate; 145, flip shaft; 2, protective cover cylinder; 3, fixing cylinder; 301, limiting channel; 4, arc swing component; 401, guide groove; 41, fixed bin; 41 1. Outer shell; 412. Belt motor; 413. Toothed disc; 414. Fixed ruler; 415. Linkage; 416. Threaded rod; 42. Swing arm; 43. Arc plate; 44. Soft suction cup; 5. Telescopic extraction assembly; 501. Upper cavity; 502. Lower cavity; 503. Corresponding window; 51. Spring tube; 52. Sleeve head; 521. Isolation plate; 522. Threaded collar; 523. Micro drive motor; 53. Magnetic ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] Reference Figure 1-5A multifunctional negative pressure suction device comprises a holding tube 1, a protective cover tube 2, a fixed tube 3, an arc-shaped swinging component 4 and a telescopic extraction component 5. A negative pressure pump 11 is installed at the top of the holding tube 1. A connecting hose 12 and a connecting straight pipe 13 connected to the negative pressure pump 11 are arranged in the holding tube 1. The fixed tube 3 is installed at the center of the axis in the protective cover tube 2 arranged at the lower end of the holding tube 1, and is connected to the negative pressure pump 11 through the connecting straight pipe 13. The telescopic extraction component 5 is installed in the fixed tube 3. The arc-shaped swinging component 4 is symmetrically installed on both sides of the fixed tube 3, and is connected to the negative pressure pump 11 through the connecting hose 12.

[0032] It can be understood that a battery for powering the negative pressure pump 11 and a control mainboard for controlling the operation of the negative pressure pump 11 are also installed in the holding tube 1. The holding tube 1 is also equipped with a charging port and a command input panel matching the battery and the control mainboard. The exhaust port of the negative pressure pump 11 also leads to the outside of the holding tube 1. Those skilled in the art who are familiar with the aforementioned battery, control mainboard, charging port, command input panel and exhaust port can adaptively set these devices according to actual needs to ensure that the negative pressure pump 11 can work according to user needs and extract the air in the connecting hose 12 or the connecting straight pipe 13 and discharge it from the exhaust port.

[0033] The interior of the fixed cylinder 3 is hollow, and the connecting straight pipe 13 passes through the fixed cylinder 3 from top to bottom and extends out from the bottom of the fixed cylinder 3. After the air inside the connecting straight pipe 13 extending from the bottom of the fixed cylinder 3 is sucked out by the negative pressure pump 11, a negative pressure that can absorb objects will be generated at the lower end. Preferably, the fixed cylinder 3 can be switched and maintained in two states of extending and retracting into the protective cover cylinder 2. When the suction operation is performed, the lower end of the fixed cylinder 3 extends out of the protective cover cylinder 2 so that the lower end of the connecting straight pipe 13 can smoothly absorb objects. After the use of the device is completed, the fixed cylinder 3 can be retracted into the protective cover cylinder 2 and protected by the protective cover cylinder 2 to avoid contamination and damage. The bottom end of the connecting straight pipe 13 can also be installed as follows Figure 1 The suction cup accessories shown can meet different picking up needs.

[0034] The arc-shaped swing component 4 includes a fixed bin 41, a swing arm 42, an arc plate 43 and a soft suction cup 44. The fixed bin 41 is symmetrically installed on the front and rear sides of the fixed cylinder 3. One end of the swing arm 42 is installed on the fixed bin 41, and the other end is installed on the arc plate 43. The arc plate 43 is composed of two vertical plates symmetrically arranged front and back. The soft suction cup 44 is installed between the two vertical plates of the arc plate 43, and the soft suction cup 44 is connected to the connecting hose 12. After the air inside the connecting hose 12 is extracted by the negative pressure pump 11, a negative pressure capable of sucking objects will be generated in the soft suction cup 44.

[0035] The swing arms 42 rotate towards each other so that the arc plates 43 are close to each other, and form a rolling block with an arc at the bottom at the lower end of the fixed tube 3. At this time, the two soft suction cups 44 are at the two ends of the rolling block. When performing pathological section sealing operations, the user first moves the soft suction cup 44 at one end close to the cover glass in the collection box, thereby sucking the cover glass out of the collection box. Thereafter, the user presses one side of the cover glass on the slide and swings the holding tube 1 to roll the cover glass to seal. Preferably, the soft suction cup 44 can be installed with an LED light source and a pressure sensing device controlled by the control main board to provide photo light during user operation, and can automatically identify the suction time of the cover glass and the successive placement time of the two soft suction cups 44, so that the user can better complete the rolling sealing operation.

[0036] The fixed warehouse 41 includes an outer warehouse shell 411, a belt rotating motor 412, a gear disk 413, a fixed ruler 414 and a linkage 415. The belt rotating motor 412 is fixedly installed at the upper end of the outer warehouse shell 411. The belt rotating motor 412 is controlled to drive the threaded sleeve threadedly matched with the threaded rod 416 installed at the lower end to rotate after power is turned on, thereby driving the threaded rod 416 to move vertically. The outer warehouse shell 411 has a space inside to allow the threaded rod 416 to be inserted after moving and rising. The linkage 415 is installed at the lower end of the threaded rod 416. The outer warehouse shell 411 has a vertically extending guide groove 401. The swing arm 42 horizontally penetrates the guide groove 401 and is coaxially connected with the gear disk 413 arranged in the outer warehouse shell 411, so that when the gear disk 413 rotates axially, it can drive the swing arm 42 to swing in the opposite direction, thereby enabling the arc plates 43 installed at the ends of the two swing arms 42 to move toward or away from each other.

[0037] The linkage member 415 shaft is installed at the center of the axis of the toothed plate 413, and the linkage member 415 is fixedly installed at the lower end of the threaded rod 416, so that the toothed plate 413 can move up and down with the threaded rod 416 and can also rotate normally. The fixed ruler 414 is vertically installed on one side of the toothed plate 413 and meshes with the toothed plate 413. When the toothed plate 413 moves up and down with the threaded rod 416, it will rotate due to the meshing with the fixed ruler 414, and after stopping moving, it will remain in a fixed rotation position due to the meshing with the fixed ruler 414.

[0038] It can be understood that the belt-rotating motor 412 is powered and controlled by the battery and the control main board arranged in the holding tube 1. When a rolling sealing operation is required, the belt-rotating motor 412 is controlled to drive the threaded rod 416 to move downward, thereby causing the toothed disc 413 to move downward and rotate, so that the two pairs of arc-jointed plates 43 move downward to the bottom of the fixed cylinder 3 and move toward each other and splice together. After completing the rolling sealing operation, the belt-rotating motor 412 is controlled to drive the threaded rod 416 to move upward, and the toothed disc 413 will also move upward and rotate synchronously. While moving upward, the two pairs of arc-jointed plates 43 will also move away from each other along with the swing arm 42 that swings synchronously with the toothed disc 413, thereby opening the space under the fixed cylinder 3 and storing them in the protective cover cylinder 2 for storage.

[0039] Example 2

[0040] Reference Figure 1-5 The difference between this embodiment and embodiment 1 is that the telescopic extraction assembly 5 includes a spring tube 51 and a sleeve head 52, the sleeve head 52 is sleeved and installed on the lower end of the connecting straight tube 13, the sleeve head 52 is hollow inside, one end of the spring tube 51 is installed on the sleeve head 52 and is connected with the inside of the sleeve head 52, and the sleeve head 52 can be switchably connected to the connecting straight tube 13.

[0041] The interior of the sleeve head 52 is divided by an isolation plate 521 into an upper chamber 501 and a lower chamber 502 that are not connected to each other. A threaded collar 522 is rotatably installed in the upper chamber 501. The outer part of the connecting straight pipe 13 wrapped by the fixed tube 3 has a thread. The threaded collar 522 cooperates with the thread on the outer side of the connecting straight pipe 13. The fixed tube 3 has a limiting channel 301 inside that allows the sleeve head 52 to move up and down. The sleeve head 52 can only move vertically in the limiting channel 301 and is restricted and cannot rotate axially. In this way, when the threaded collar 522 rotates axially, it can drive the entire telescopic extraction assembly 5 to move vertically up and down along the connecting straight pipe 13.

[0042] A micro drive motor 523 is installed in the upper cavity 501. The micro drive motor 523 is powered and controlled by a battery and a control mainboard. The micro drive motor 523 can drive the gear meshing with the toothed ring arranged outside the threaded collar 522 to rotate, thereby driving the threaded collar 522 to rotate axially. It can be understood that the micro drive motor 523 can also drive the threaded collar 522 to rotate axially in other ways, including but not limited to driving a chain or a transmission rod that is transmission-connected to the threaded collar 522.

[0043] A connecting window 101 is provided near the bottom end of the connecting straight pipe 13. Under normal circumstances, the connecting window 101 is closed by a closed switching component 14 arranged in the connecting straight pipe 13, so that the fluid can enter the connecting straight pipe 13 from the bottom end of the connecting straight pipe 13 and be finally pumped out by the negative pressure pump 11. The closed switching component 14 includes a fixing ring 141, a reset spring 142, a sealing rotating plate 143 and a sealing ring plate 144. The fixing ring 141 is fixedly installed on the inner wall of the connecting straight pipe 13 above the connecting window 101. The upper end of the reset spring 142 is connected to the fixing ring 141, and the lower end is connected to the sealing ring plate 144. The sealing ring plate 144 passes through from top to bottom and is arranged close to the inner wall of the connecting straight pipe 13. When the reset spring 142 is at a normal length, the sealing ring plate 144 is just in a position to completely close the connecting window 101.

[0044] The sealing rotating plate 143 is installed on the upper part of the sealing ring plate 144. When the sealing rotating plate 143 is rotated to a horizontal state, the horizontal cross-section of the sealing ring plate 144 can be closed. Flip shafts 145 are symmetrically arranged on both sides of the sealing rotating plate 143. The flip shafts 145 can rotatably penetrate the sealing ring plate 144 and pass through the tooth guide rail 102 vertically opened on the side wall of the connecting straight tube 13. One side row of the tooth guide rail 102 is provided with teeth. The outer peripheral wall of the flip shaft 145 has a tooth ring meshing with the tooth row of the tooth guide rail 102, so that the flip shaft 145 can rotate when moving up and down in the tooth guide rail 102, thereby driving the sealing rotating plate 143 to flip and maintain it in a fixed flip position.

[0045] The lower cavity 502 is provided with a corresponding window 503 close to the side wall of the connecting straight pipe 13. The downward movement of the sleeve head 52 can make the corresponding window 503 correspond to the connecting window 101. Before the sleeve head 52 moves downward and the corresponding window 503 corresponds to the connecting window 101, the bottom plate of the sleeve head 52 will contact the flip shaft 145 extending out of the tooth guide rail 102. When the flip shaft 145 is at the top of the tooth guide rail 102, the sealing rotating plate 143 is in an upright state in the connecting straight pipe 13, and the fluid can flow normally from the bottom opening of the connecting straight pipe 13 along the connecting straight pipe 13 to the negative pressure pump 11. Assuming that the head 52 moves downward and presses the flip shaft 145 down to the bottom of the tooth guide rail 102, the sealing ring plate 144 will move downward with the flip shaft 145 to open the connecting window 101, and at the same time, the sealing rotating plate 143 will also rotate to a horizontal state with the flip shaft 145, thereby isolating the space below the sealing rotating plate 143 from the upper space. At this time, the external fluid can only enter the lower cavity 502 through the spring tube 51 connected to the lower cavity 502, and then pass through the corresponding window 503 and the connecting window 101 to flow up along the connecting straight tube 13 to the negative pressure pump 11, so that the spring tube 51 at this time has the function of sucking experimental waste liquid.

[0046] Preferably, a plurality of magnetic rings 53 are fixedly sleeved on the outside of the spring tube 51, so that the spring tube 51 can be wrapped around the connecting straight tube 13 after use and adsorbed and tightly attached to each other for storage. The spring tube 51 wrapped around the connecting straight tube 13 can also be stored in the limiting channel 301 as the sleeve head 52 rises. After the sleeve head 52 is moved back to the limiting channel 301, the return spring 142 can pull the sealing ring plate 144 back to the position of closing the connecting window 101. At this time, the sealing rotating plate 143 will also rotate to the upright state with the rising flip shaft 145, thereby reopening the bottom space of the connecting straight tube 13. The bottom end of the spring tube 51 can also be installed as follows Figure 2 The tubular pipette accessories shown are used to meet different pipetting needs.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional negative pressure suction device, comprising a holding tube (1), a protective cover tube (2), a fixing tube (3), an arc-shaped swinging component (4) and a telescopic material extraction component (5), characterized in that: A negative pressure pump (11) is installed at the top of the holding tube (1), and a connecting hose (12) and a connecting straight pipe (13) connected to the negative pressure pump (11) are arranged inside the holding tube (1); the fixed tube (3) is installed in a protective cover tube (2) arranged at the lower end of the holding tube (1), and is connected to the negative pressure pump (11) through the connecting straight pipe (13); the telescopic pumping assembly (5) is installed in the fixed tube (3); the arc-shaped swing assembly (4) is symmetrically installed on both sides of the fixed tube (3), and is connected to the negative pressure pump (11) through the connecting hose (12); The arc-shaped swing assembly (4) comprises a fixed bin (41), a swing arm (42), an arc-jointing plate (43) and a soft suction cup (44); the fixed bin (41) is symmetrically mounted on the front and rear sides of the fixed cylinder (3); one end of the swing arm (42) is mounted on the fixed bin (41) and the other end is mounted on the arc-jointing plate (43); the soft suction cup (44) is mounted on the arc-jointing plate (43) and connected to the connecting hose (12); The telescopic extraction assembly (5) comprises a spring tube (51) and a sleeve head (52); the sleeve head (52) is sleeved and installed on the lower end of the connecting straight tube (13); the interior of the sleeve head (52) is hollow; one end of the spring tube (51) is installed on the sleeve head (52) and is connected to the interior of the sleeve head (52); the sleeve head (52) can be switchably connected to the connecting straight tube (13).

2. A multifunctional negative pressure suction device according to claim 1, characterized in that: The telescopic extraction assembly (5) comprises a spring tube (51) and a sleeve head (52); the sleeve head (52) is sleeved and installed on the connecting straight tube (13); one end of the spring tube (51) is installed on the sleeve head (52) and is connected to the inside of the sleeve head (52); the inside of the fixed tube (3) has a limiting channel (301) that allows the sleeve head (52) to move up and down; the connecting straight tube (13) penetrates the fixed tube (3) from top to bottom and extends out from the bottom of the fixed tube (3).

3. A multifunctional negative pressure suction device according to claim 2, characterized in that: The sleeve head (52) can only move vertically in the limiting channel (301) and is restricted from axial rotation. The interior of the sleeve head (52) is divided into an upper cavity (501) and a lower cavity (502) which are not connected to each other by an isolation plate (521). A threaded collar (522) is rotatably installed in the upper cavity (501). The portion of the connecting straight tube (13) wrapped by the fixing tube (3) has threads on the outside. A micro drive motor (523) is installed in the upper cavity (501). The micro drive motor (523) can drive the threaded collar (522) to rotate axially.

4. A multifunctional negative pressure suction device according to claim 1, characterized in that: A connecting window (101) is provided near the bottom end of the connecting straight pipe (13). The connecting window (101) is normally closed by a closed switching assembly (14) disposed in the connecting straight pipe (13). The closed switching assembly (14) comprises a fixing ring (141), a return spring (142), a sealing rotating plate (143) and a sealing ring plate (144). The fixing ring (141) is fixedly mounted on the inner side wall of the connecting straight pipe (13) above the connecting window (101). The upper end of the return spring (142) is connected to the connecting window (101). The fixing ring (141) has a lower end connected to a sealing ring plate (144). The sealing ring plate (144) passes through from top to bottom and is arranged in close contact with the inner wall of the connecting straight pipe (13). When the return spring (142) is at a normal length, the sealing ring plate (144) is just in a position to completely close the connecting window (101). The lower cavity (502) is in close contact with the side wall of the connecting straight pipe (13) and is provided with a corresponding window (503). The downward movement of the sleeve head (52) can make the corresponding window (503) correspond to the connecting window (101).

5. A multifunctional negative pressure suction device according to claim 4, characterized in that: The sealing rotating plate (143) is installed on the upper part of the sealing ring plate (144). When the sealing rotating plate (143) is rotated to a horizontal state, the horizontal cross section of the sealing ring plate (144) can be closed. Flip rotating shafts (145) are symmetrically arranged on both sides of the sealing rotating plate (143). The flip rotating shafts (145) can rotatably penetrate the sealing ring plate (144) and pass through a tooth guide rail (102) vertically opened on the side wall of the connecting straight tube (13). One side row of the tooth guide rail (102) is provided with teeth, and the outer peripheral wall of the flip rotating shaft (145) has a tooth ring meshing with the tooth row of the tooth guide rail (102).

6. A multifunctional negative pressure suction device according to claim 1, characterized in that: The fixed bin (41) comprises an outer bin shell (411), a belt-rotating motor (412), a toothed disc (413), a fixed ruler (414) and a linkage (415); the belt-rotating motor (412) is fixedly installed at the upper end of the inner part of the outer bin shell (411); the belt-rotating motor (412) is controlled to drive a threaded sleeve threadedly matched with a threaded rod (416) installed at the lower end to rotate after being powered on; the inner part of the outer bin shell (411) has a space allowing the threaded rod (416) to be inserted after being moved and raised.

7. A multifunctional negative pressure suction device according to claim 6, characterized in that: The linkage member (415) is installed at the lower end of the threaded rod (416), the outer housing (411) has a vertically extending guide groove (401), and the swing arm (42) horizontally penetrates the guide groove (401) and is coaxially connected to the toothed plate (413) arranged in the outer housing (411).

8. The multifunctional negative pressure suction device according to claim 6, characterized in that: The rotating shaft of the linkage member (415) is installed at the center of the axis of the toothed plate (413), and the linkage member (415) is fixedly installed at the lower end of the threaded rod (416). The fixed ruler (414) is vertically installed on one side of the toothed plate (413) and meshes with the toothed plate (413). When the toothed plate (413) moves up and down with the threaded rod (416), it will rotate due to the meshing with the fixed ruler (414).

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