Improved multifunctional vacuum sealing machine

Abstract

The utility model discloses an improved multifunctional vacuum sealer, which is characterized in that the front end part of an air nozzle is provided with an extraction opening, one side of the middle part of the air nozzle facing a vacuumizing cavity is provided with an air vent, the air nozzle is communicated with the vacuumizing cavity through the air vent during vacuumizing, and the rear side of the vacuumizing cavity is provided with a sealing gasket; during sealing, the sealing gasket is in sealing fit with the ventilation opening, the vacuum pump is connected with the gas path switching mechanism, and the gas path switching mechanism is connected with the gas nozzle or the vacuumizing cavity. The left side and the right side of the lower base are each provided with a cover locking mechanism, the left side and the right side of the upper cover are each provided with a connecting buckle connected with the cover locking mechanism in a buckled mode, the vacuumizing cavity is provided with at least one pressure relief opening, and the at least one cover locking mechanism is matched with the pressure relief opening in a sealed mode. The vacuum sealing machine can be used for vacuumizing and sealing smooth surface bags and grain bags at the same time, the application range is wide, the air tap can be completely recycled into the vacuum sealing machine, the air tap is protected, an air tap driving structure is simplified, cost is reduced, and occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sealers, in particular to an improved multifunctional vacuum sealer. Background Art

[0002] A vacuum sealer is a machine that extracts the air from a vacuum packaging bag to form a vacuum, and then seals the vacuum packaging bag with plastic. It is mainly used for food packaging to preserve food. Vacuum packaging bags include textured bags and smooth bags, and vacuum sealers include vacuum sealers for textured bags and for smooth bags. The vacuum sealer for textured bags places the bag opening of the textured bag in a vacuum chamber, and evacuates the vacuum chamber to evacuate the textured bag; the vacuum sealer for smooth bags inserts a telescopic air nozzle into the smooth bag to evacuate the bag, and after the vacuum is evacuated, the air nozzle retracts to facilitate sealing; therefore, textured bags and smooth bags need to be vacuum sealed by different vacuum sealers, which have a small scope of application and great limitations. A small number of vacuum sealers on the market are equipped with both a vacuum chamber and a telescopic air nozzle to achieve the same effect. The invention relates to a vacuum sealer for packaging a bag having a smooth surface and a pattern. ... Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an improved multifunctional vacuum sealer, which can vacuum and seal smooth bags and textured bags at the same time, has a wide range of applications, and the air nozzle can be completely recovered into the vacuum sealer to protect the air nozzle, simplify the air nozzle drive structure, reduce costs, and reduce space occupancy.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: an improved multifunctional vacuum sealing machine, comprising an upper cover and a lower seat, the rear side of the upper cover and the rear side of the lower seat are hinged to each other, a bag insertion gap is provided between the upper cover and the lower seat, a control circuit is arranged in the upper cover or the lower seat, a heat sealing assembly is arranged in the front side of the bag insertion gap, a vacuum chamber is arranged in the rear side of the bag insertion gap, an air nozzle slidably installed in the bag insertion gap, a driving mechanism for driving the air nozzle to slide back and forth, an air path switching mechanism and at least one vacuum pump are arranged in the lower seat, the vacuum pump and the heat sealing assembly are respectively electrically connected to the control circuit, the driving mechanism is transmission-connected to the air nozzle, an air suction port is arranged at the front end of the air nozzle, a vent is arranged at the middle part of the air nozzle facing the side of the vacuum chamber, the air nozzle is connected to the vacuum chamber through the vent when vacuuming, a sealing pad is arranged on the rear side of the vacuum chamber, the sealing pad is sealed and matched with the vent when sealing, the vacuum pump is connected to the air path switching mechanism, and the air path switching mechanism is connected to the air nozzle or the vacuum chamber;

[0005] A locking cover mechanism is respectively arranged on the left and right sides of the lower seat, and a connecting buckle connected to the locking cover mechanism is respectively arranged on the left and right sides of the upper cover. The vacuum chamber is provided with at least one pressure relief port, and at least one locking cover mechanism is sealed with the pressure relief port.

[0006] In a further technical solution, the driving mechanism includes a driving motor, a reduction assembly, a driving gear, a driving rack and a detection assembly for detecting the position of the air nozzle. The driving motor is transmission-connected to the reduction assembly, the reduction assembly is transmission-connected to the driving gear, the driving gear is meshed with the driving rack, and the driving rack is transmission-connected to the air nozzle.

[0007] In a further technical solution, the detection component includes a PCB board and three optical coupling sensors. The PCB board is fixedly mounted on one side of the driving rack. The three optical coupling sensors are arranged on the PCB board at intervals along the sliding direction of the air nozzle. The three optical coupling sensors are electrically connected to the control circuit through the PCB board. A detection part is arranged on one side of the driving rack adjacent to the PCB board, and the detection part is triggered and cooperated with the three optical coupling sensors respectively.

[0008] In a further technical solution, the air nozzle is provided with an exhaust position, a sealing position and a storage position.

[0009] When the air nozzle is in the vacuum position, the air nozzle passes through the vacuum chamber and the heat sealing assembly and extends out of the front side of the multifunctional vacuum sealer, the vent is connected with the vacuum chamber, and the detection part is triggered and cooperated with the first optical coupling sensor;

[0010] When the air nozzle is in the sealing position, the front end of the air nozzle extends into the vacuum chamber, the sealing gasket blocks the vent, and the detection part is triggered and cooperated with the second optical coupling sensor;

[0011] When the air nozzle is in the storage position, the air nozzle moves backward to the rear side of the vacuum chamber, and the detection part is triggered to cooperate with the third optical coupling sensor.

[0012] In a further technical solution, an air nozzle mounting seat is fixedly installed in the lower seat, the air nozzle is slidably installed on the air nozzle mounting seat, the PCB board is fixedly installed on one side of the air nozzle mounting seat, a rack connecting seat is provided at the rear of the driving rack, and an air nozzle connecting seat is provided at the rear of the air nozzle. The rack connecting seat and the air nozzle connecting seat are rotatably connected, and an elliptical mounting sliding hole is provided on the rack connecting seat or the air nozzle connecting seat. The corresponding air nozzle connecting seat or the rack connecting seat is provided with a rotating shaft, which is inserted into the mounting sliding hole, and an elastic abutment piece is provided on the rear side of the sealing gasket, which cooperates with the air nozzle abutment.

[0013] In a further technical solution, the gas circuit switching mechanism includes a switching cylinder and a switching piston, the front part of the switching piston is slidably installed in the switching cylinder, the rear end of the switching piston is provided with a switching lever, the switching lever extends out of the switching cylinder and protrudes from the lower seat, the switching cylinder is provided with an external interface, an air inlet, a switching interface and an air outlet in sequence along the length direction, the external interface is connected to the atmosphere, the air inlet is connected to the outlet of the vacuum pump, the air outlet is connected to the inlet of the vacuum pump, the rear end of the air nozzle is sealed, and the switching interface is connected to the vacuum chamber;

[0014] An outer wall of the switching piston is provided with an air-inflating connecting groove and an air-exhausting connecting groove along the circumferential direction. The air-inflating connecting groove and the air-exhausting connecting groove are arranged at intervals along the length direction of the switching piston. The air-inflating connecting groove and the air-exhausting connecting groove are relatively sealed.

[0015] When vacuuming, the switching interface is connected to the air outlet through the air extraction connecting groove, the external interface is connected to the air inlet through the inner cavity of the switching cylinder, and the external interface is connected to the atmosphere;

[0016] During inflation, the switching interface is connected to the air inlet through the inflation connecting groove, and the air outlet is connected to the atmosphere through the exhaust connecting groove.

[0017] In a further technical solution, the locking cover mechanism includes a locking cover slider, a pressure relief rubber pad and a return spring. The locking cover slider is installed on the side of the lower seat for horizontal sliding. The locking cover slider is engaged with the corresponding connecting buckle. One end of the return spring presses against the lower seat and the other end presses against the locking cover slider. The pressure relief rubber pad is fixedly installed on the locking cover slider and seals with the pressure relief port. When unlocking, the pressure relief rubber pad is separated from the pressure relief port.

[0018] In a further technical solution, the vacuum chamber is arranged on the front side of the lower seat, and an elastic pressure seal is provided at the position of the upper cover corresponding to the vacuum chamber. The elastic pressure seal includes a pressure plate and a plurality of pressure springs. The pressure plate is slidably installed on the upper cover and is located above the vacuum chamber. The pressure springs are arranged between the pressure plate and the upper cover at intervals. A circle of lower elastic sealing ring is provided at the outer edge of the vacuum chamber, and a circle of upper elastic sealing ring is provided on the bottom surface of the pressure plate. The upper elastic sealing ring and the lower elastic sealing ring are pressed against each other.

[0019] In a further technical solution, the heat sealing assembly includes a heating strip and an elastic sealing part, the elastic sealing part includes a sealing strip, a pressure strip and a plurality of sealing springs, the heating strip is arranged on the front side of the lower seat and is located on the front side of the vacuum chamber, the sealing strip is slidably installed on the front side of the upper cover and is located above the heating strip, the pressure strip is fixedly installed on the bottom surface of the sealing strip, the pressure strip cooperates with the heating strip to press against the top, and each sealing spring is arranged at intervals between the sealing strip and the upper cover.

[0020] In a further technical solution, a vacuum tube and a plurality of bag blocking strips are arranged in the vacuum chamber, the upper end of the vacuum tube is connected to the vacuum chamber, the lower end of the vacuum tube is connected to the switching interface, the bag blocking strips are arranged at intervals on the rear inner wall of the vacuum chamber in the transverse direction, the pressure plate is provided with avoidance grooves at positions corresponding to the bag blocking strips, and the bag blocking strips extend out of the vacuum chamber and are inserted into the corresponding avoidance grooves;

[0021] The vacuum chamber is also connected to a pressure sensor, which is electrically connected to the control circuit. The upper cover or the lower seat is provided with a plurality of control buttons and indicator lights, each of which is electrically connected to the control circuit.

[0022] A spring cover assembly is respectively arranged on the left and right sides of the lower seat, and the spring cover assembly includes a spring cover shell, a spring cover spring and a spring cover ball. The spring cover shell is fixedly installed inside the lower seat, the spring cover ball is slid up and down in the spring cover shell, and the upper end of the spring cover ball passes through the lower seat and cooperates with the upper cover. The spring cover spring is arranged inside the spring cover shell and presses against the spring cover ball.

[0023] After adopting the above structure, the advantages of the utility model compared with the prior art are: the pattern bag is vacuumed by the vacuum chamber, and the smooth bag is vacuumed by the air nozzle, thereby expanding the application scope of the vacuum sealer; when vacuuming, the vacuum chamber is connected with the air nozzle through the vent, and the vent is blocked by the sealing gasket when sealing, and the vacuum pump only needs to be connected to the vacuum chamber or the air nozzle, which simplifies the structure and reduces the cost; the vacuum pump and the vacuum chamber are connected by the air path switching mechanism, which is convenient for controlling the air flow direction in the vacuum chamber to realize the conversion of the exhaust and inflation functions, with a simple structure, low cost, convenient use and richer functions; the driving mechanism drives the air nozzle to move through the gear rack structure, with a simple structure, low cost, high reliability and low failure rate, and three optical coupling sensors are arranged to make the air nozzle completely retract when not in use to protect the air nozzle and improve reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is an exploded view of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the gas nozzle and the driving mechanism of the utility model;

[0028] Figure 4 It is an exploded view of the gas nozzle and the driving mechanism of the utility model;

[0029] Figure 5 This is a reference diagram of the state of the gas nozzle of the utility model when it is in the air extraction position;

[0030] Figure 6 This is a reference diagram of the state of the gas nozzle of the utility model when it is in the sealing position;

[0031] Figure 7 This is a reference diagram of the state of the gas nozzle of the utility model when it is in the storage position;

[0032] Figure 8 This is a schematic diagram of the gas circuit connection of the utility model during air extraction;

[0033] Fig. 9 It is a schematic diagram of the gas circuit connection of the utility model during inflation;

[0034] Fig.10 It is a schematic diagram of the gas circuit connection when the cover is opened to release pressure.

[0035] In the figure:

[0036] 1 upper cover, 11 connecting buckles, 12 control buttons, 13 indicator lights;

[0037] 2 lower seat, 21 sealing pad, 22 air nozzle mounting seat, 23 elastic supporting member, 24 vacuum pump;

[0038] 31 heating strip, 32 sealing strip, 33 pressing strip, 34 sealing spring;

[0039] 4 vacuum chamber, 41 pressure relief port, 42 lower elastic sealing ring, 43 vacuum pipe, 44 bag blocking strip;

[0040] 5 air nozzle, 51 air extraction port, 52 air vent, 53 driving motor, 54 reduction assembly, 55 driving gear, 56 driving rack, 561 detection unit, 562 rack connection seat, 563 rotating shaft, 57 PCB board, 58 optical coupling sensor, 59 air nozzle connection seat, 591 mounting slide hole;

[0041] 6 gas path switching mechanism, 61 switching cylinder, 611 external interface, 612 air inlet, 613 switching interface, 614 air outlet, 62 switching piston, 621 switching lever, 622 charging connecting groove, 623 exhaust connecting groove;

[0042] 7 locking cover mechanism, 71 locking cover slider, 72 pressure relief rubber pad, 73 return spring;

[0043] 8 elastic pressure sealing member, 81 pressure plate, 82 avoidance groove, 83 pressure spring, 84 upper elastic sealing ring;

[0044] 9. Bullet cover assembly, 91. Bullet cover housing, 92. Bullet cover pin. DETAILED DESCRIPTION

[0045] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0046] An improved multifunctional vacuum sealer, such as Figures 1 to 10As shown, it includes an upper cover 1 and a lower seat 2, the rear side of the upper cover 1 and the rear side of the lower seat 2 are hinged to each other, a bag insertion gap is provided between the upper cover 1 and the lower seat 2, a control circuit is provided in the upper cover 1 or the lower seat 2, a heat sealing assembly is provided at the front side of the bag insertion gap, a vacuum chamber 4 is provided at the rear side of the bag insertion gap, an air nozzle 5 slidably installed in the bag insertion gap, a driving mechanism for driving the air nozzle 5 to slide back and forth, an air path switching mechanism 6 and at least one vacuum pump 24 are provided in the lower seat 2, the vacuum pump 24 and the heat sealing assembly are electrically connected to the control circuit respectively, the driving mechanism is transmission-connected to the air nozzle 5, the front end of the air nozzle 5 is provided with an air suction port 51, the middle of the air nozzle 5 A vent 52 is provided on the side facing the vacuum chamber 4, and the air nozzle 5 is connected to the vacuum chamber 4 through the vent 52 during vacuuming, and a sealing gasket 21 is provided on the rear side of the vacuum chamber 4, and the sealing gasket 21 is sealed with the vent 52 during sealing, the vacuum pump 24 is connected with the air path switching mechanism 6, and the air path switching mechanism 6 is connected with the air nozzle 5 or the vacuum chamber 4; a locking cover mechanism 7 is respectively provided on the left and right sides of the lower seat 2, and a connecting buckle 11 which is snap-connected with the locking cover mechanism 7 is respectively provided on the left and right sides of the upper cover 1, and the vacuum chamber 4 is provided with at least one pressure relief port 41, and at least one locking cover mechanism 7 is sealed with the pressure relief port 41.

[0047] The traditional vacuum sealer can only vacuum and seal, has a single functionality, and is only suitable for smooth bags or textured bags, with a small scope of application. The vacuum pump 24 needs to be connected to the air nozzle 5 and the vacuum chamber 4 at the same time, with a complex structure and high cost. The utility model vacuums the textured bags through the vacuum chamber 4 and vacuums the smooth bags through the air nozzle 5, thereby expanding the scope of application of the vacuum sealer; when vacuuming, the vacuum chamber 4 is connected to the air nozzle 5 through the vent 52, and when sealing, the vent 52 is blocked by the sealing pad 21. The vacuum pump 24 only needs to be connected to the vacuum chamber 4 or the air nozzle 5, thereby simplifying the structure and reducing the cost; the vacuum pump 24 and the vacuum chamber 4 are connected through the air path switching mechanism 6, so as to facilitate the control of the airflow direction in the vacuum chamber 4 to realize the conversion of the exhaust and inflation functions, with a simple structure, low cost, convenient use, and richer functions.

[0048] Specifically, the driving mechanism includes a driving motor 53, a reduction assembly 54, a driving gear 55, a driving rack 56, and a detection assembly for detecting the position of the air nozzle 5. The driving motor 53 is transmission-connected to the reduction assembly 54, the reduction assembly 54 is transmission-connected to the driving gear 55, the driving gear 55 is meshed with the driving rack 56, and the driving rack 56 is transmission-connected to the air nozzle 5. The driving mechanism drives the air nozzle 5 to move through the gear rack structure, has a simple structure, low cost, high reliability, and low failure rate, detects the position of the driving rack 56 through the detection assembly, and automatically controls the extension and retraction of the air nozzle 5, which is convenient to use.

[0049] Specifically, the detection component includes a PCB board 57 and three optical coupling sensors 58. The PCB board 57 is fixedly installed on one side of the driving rack 56. The three optical coupling sensors 58 are arranged on the PCB board 57 at intervals along the sliding direction of the air nozzle 5. The three optical coupling sensors 58 are electrically connected to the control circuit through the PCB board 57. A detection part 561 is arranged on one side of the driving rack 56 adjacent to the PCB board 57. The detection part 561 is triggered and cooperated with the three optical coupling sensors 58 respectively. The air nozzle 5 is provided with an exhaust position, a sealing position and a storage position. The three optical coupling sensors 58 are used to respectively detect whether the air nozzle 5 reaches the exhaust position, the sealing position and the storage position, so as to realize automatic and precise control without manual operation and more convenient use. By setting the storage position for the air nozzle 5, the air nozzle 5 can be completely retracted when not in use, so as to prevent the air nozzle 5 from being blocked or deformed and damaged due to leakage, thereby improving reliability and stability.

[0050] like Figure 5 As shown, when the air nozzle 5 is in the vacuuming position, the air nozzle 5 passes through the vacuum chamber 4 and the heat sealing assembly and extends to the front side of the multifunctional vacuum sealer, the vent 52 is connected with the vacuum chamber 4, and the detection part 561 cooperates with the first optical coupling sensor 58 to trigger; the air nozzle 5 is extended and inserted into the smooth bag, at this time, the air nozzle 5 is connected with the vacuum chamber 4 through the vent 52, the vacuum pump 24 evacuates the vacuum chamber 4, and the air nozzle 5 can vacuum the smooth bag at the same time, with a simple structure and low cost.

[0051] like Figure 6 As shown, when the air nozzle 5 is in the sealing position, the front end of the air nozzle 5 extends into the vacuum chamber 4, the sealing gasket 21 blocks the vent 52, and the detection part 561 cooperates with the second optical coupling sensor 58 to trigger; the air nozzle 5 moves backward to avoid the heat sealing component, and at this time the vent 52 is blocked by the sealing gasket 21 to prevent air leakage.

[0052] like Figure 7 As shown, when the air nozzle 5 is in the storage position, the air nozzle 5 moves backward to the rear side of the vacuum chamber 4, and the detection part 561 is triggered to cooperate with the third optical coupling sensor 58. When the air nozzle 5 is not in use, the air nozzle 5 is completely retracted to protect the air nozzle 5.

[0053] Specifically, a gas nozzle mounting seat 22 is fixedly installed in the lower seat 2, the gas nozzle 5 is slidably installed on the gas nozzle mounting seat 22, the PCB board 57 is fixedly installed on one side of the gas nozzle mounting seat 22, a rack connecting seat 562 is provided at the rear of the driving rack 56, and a gas nozzle connecting seat 59 is provided at the rear of the gas nozzle 5, the rack connecting seat 562 and the gas nozzle connecting seat 59 are rotatably connected, the rack connecting seat 562 is provided with an elliptical mounting sliding hole 591, and the gas nozzle connecting seat 59 is provided with a rotating shaft 563, or the gas nozzle connecting seat 59 is provided with an elliptical mounting sliding hole 591, and the rack connecting seat 562 is provided with a rotating shaft 563, and the rotating shaft 563 is inserted into the mounting sliding hole 591, and an elastic abutting piece 23 is provided on the rear side of the sealing gasket 21, and the elastic abutting piece 23 cooperates with the gas nozzle 5 to abut. The elastic resisting member 23 adopts a torsion spring, and the air nozzle 5 is arranged on the air nozzle mounting seat 22, which is convenient for production and assembly, and the driving rack 56 is rotatably connected with the air nozzle 5 through the rack connecting seat 562 and the air nozzle connecting seat 59, so that the air nozzle 5 can have a certain rotation angle, and the air nozzle 5 is pushed up by the elastic resisting member 23, so that the air nozzle 5 is tilted upward, which is convenient for the air nozzle 5 to be inserted into the vacuum packaging bag; through the elliptical mounting slide hole 591, the air nozzle 5 can not only do circular swinging motion, but also move up and down to keep it level during vacuuming, prevent the air nozzle 5 from getting stuck and causing leakage of the vacuum chamber 4, and improve reliability and stability.

[0054] Specifically, the gas path switching mechanism 6 includes a switching cylinder 61 and a switching piston 62. The front part of the switching piston 62 is slidably installed in the switching cylinder 61. The rear end of the switching piston 62 is provided with a switching lever 621. The switching lever 621 extends out of the switching cylinder 61 and protrudes from the lower seat 2. The switching cylinder 61 is provided with an external interface 611, an air inlet 612, a switching interface 613 and an air outlet 614 in sequence along the length direction. The external interface 611 is connected to the atmosphere, the air inlet 612 is connected to the outlet of the vacuum pump 24, the air outlet 614 is connected to the inlet of the vacuum pump 24, the rear end of the air nozzle 5 is sealed, and the switching interface 613 is connected to the vacuum chamber. 4 connection; the outer side wall of the switching piston 62 is provided with an inflation communicating groove 622 and an exhaust communicating groove 623 along the circumferential direction, the inflation communicating groove 622 and the exhaust communicating groove 623 are arranged at intervals along the length direction of the switching piston 62, and the inflation communicating groove 622 and the exhaust communicating groove 623 are relatively sealed; the switching interface 613 is connected to the vacuum chamber 4, and there is no need to connect the air nozzle 5, which is convenient for moving the air nozzle 5, thereby improving reliability and stability; the air circuit is switched by moving the switching piston 62 to realize the inflation function, and when fragile items need to be packaged, the items can be protected by inflation to prevent the items from being broken, thereby improving the functionality of the vacuum sealer.

[0055] like Figure 8As shown, when vacuuming, the switching interface 613 is connected to the air outlet 614 through the air extraction connecting groove 623, the external interface 611 is connected to the air inlet 612 through the inner cavity of the switching cylinder 61, and the external interface 611 is connected to the atmosphere;

[0056] like Fig. 9 As shown, during inflation, the switching interface 613 is connected to the air inlet 612 through the inflation connecting groove 622 , and the air outlet 614 is connected to the atmosphere through the exhaust connecting groove 623 .

[0057] Specifically, the locking cover mechanism 7 includes a locking cover slider 71, a pressure relief rubber pad 72 and a reset spring 73. The locking cover slider 71 is installed on the side of the lower seat 2 in a transverse sliding manner. The locking cover slider 71 is clamped with the corresponding connecting buckle 11. One end of the reset spring 73 presses against the lower seat 2 and the other end presses against the locking cover slider 71. The pressure relief rubber pad 72 is fixedly installed on the locking cover slider 71 and is sealed with the pressure relief port 41. When unlocking, the pressure relief rubber pad 72 is separated from the pressure relief port 41. Traditional vacuum sealers either do not have a pressure relief mechanism or require an independent pressure relief mechanism for pressure relief. Vacuum sealers without a pressure relief mechanism are difficult to open and inconvenient to use. Vacuum sealers with an independent pressure relief mechanism have a complex structure and pressure relief is performed before opening the cover. The operation steps are cumbersome. The utility model drives the pressure relief rubber pad 72 to move through the locking cover slider 71. When opening the cover, Fig.10 As shown, the pressure relief rubber pad 72 is separated from the pressure relief port 41 by pressing and moving the locking cover slider 71. At the same time, the locking cover slider 71 is separated from the connecting buckle 11, and the cover is unlocked and opened while the pressure is released. The structure is simple and easy to use. The locking cover slider 71 is reset by the reset spring 73, so that the pressure relief rubber pad 72 re-blocks the pressure relief port 41. The structure is simple and the cost is low.

[0058] Specifically, the vacuum chamber 4 is arranged on the front side of the lower seat 2, and an elastic pressure seal 8 is provided at the position of the upper cover 1 corresponding to the vacuum chamber 4. The elastic pressure seal 8 includes a pressure plate 81 and a plurality of pressure springs 83. The pressure plate 81 is slidably installed on the upper cover 1 up and down and is located above the vacuum chamber 4. The pressure springs 83 are arranged between the pressure plate 81 and the upper cover 1 at intervals. A circle of lower elastic sealing ring 42 is provided on the outer edge of the vacuum chamber 4, and a circle of upper elastic sealing ring 84 is provided on the bottom surface of the pressure plate 81. The upper elastic sealing ring 84 is pressed against the lower elastic sealing ring 42. When vacuuming, the pressure plate 81 is covered on the vacuum chamber 4, and then cooperates with the upper elastic sealing ring 84 and the lower elastic sealing ring 42 to form a closed chamber in the vacuum chamber 4, and the bag mouth of the vacuum packaging bag is inserted into the vacuum chamber 4, so that the vacuum chamber 4 is evacuated to achieve vacuuming of the vacuum packaging bag, and the pressure spring 83 pushes the pressure plate 81 to be pressed tightly against the top of the vacuum chamber 4 to provide a clamping force to prevent a gap from being generated between the upper elastic sealing ring 84 and the lower elastic sealing ring 42 and the vacuum packaging bag, thereby improving the sealing performance and thus increasing the vacuuming speed.

[0059] Specifically, the heat sealing assembly includes a heating strip 31 and an elastic sealing member, the elastic sealing member includes a sealing strip 32, a pressing rubber strip 33 and a plurality of sealing springs 34, the heating strip 31 is arranged at the front side of the lower seat 2 and located at the front side of the vacuum chamber 4, the sealing strip 32 is slidably installed at the front side of the upper cover 1 and located above the heating strip 31, the pressing rubber strip 33 is fixedly installed at the bottom surface of the sealing strip 32, the pressing rubber strip 33 and the heating strip 31 are pressed against each other, and each sealing spring 34 is arranged at intervals between the sealing strip 32 and the upper cover 1. The sealing strip 32 is pushed by the sealing spring 34 so that the pressing rubber strip 33 is pressed tightly against the heating strip 31, thereby increasing the pressing force on the vacuum packaging bag and improving the sealing effect.

[0060] The bag stoppers 44 are connected to the rear wall of the vacuum chamber 4 and the bag stoppers 44 are connected to the rear wall of the vacuum chamber 4.

[0061] The vacuum chamber 4 is also connected to a pressure sensor, which is electrically connected to the control circuit. The upper cover 1 or the lower seat 2 is provided with a plurality of control buttons 12 and indicator lights 13, each of which is electrically connected to the control circuit. The pressure of the vacuum chamber 4 is sensed by the pressure sensor, and when the preset threshold is reached, the control circuit automatically turns off the vacuum pump 24 to achieve automatic vacuum sealing, thereby improving the degree of automation and making it more convenient to use.

[0062] A cover assembly 9 is provided on the left and right sides of the lower seat 2, respectively. The cover assembly 9 includes a cover housing 91, a cover spring and a cover ball 92. The cover housing 91 is fixedly installed inside the lower seat 2. The cover ball 92 is installed in the cover housing 91 for sliding up and down, and the upper end of the cover ball 92 passes through the lower seat 2 and abuts against the upper cover 1. The cover spring is provided inside the cover housing 91 and abuts against the cover ball 92. When the upper cover 1 is opened, after the cover locking mechanism 7 is unlocked, the upper cover 1 is lifted up by the cover assembly 9 and plays a supporting role, preventing the upper cover 1 from re-locking the connection buckle 11 with the cover locking mechanism 7 under gravity.

[0063] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved multifunctional vacuum sealer, comprising an upper cover (1) and a lower seat (2), wherein the rear side of the upper cover (1) and the rear side of the lower seat (2) are hinged to each other, and a bag insertion gap is provided between the upper cover (1) and the lower seat (2), characterized in that: A control circuit is arranged in the upper cover (1) or the lower seat (2); a heat sealing assembly is arranged at the front side of the bag insertion gap; a vacuum chamber (4) is arranged at the rear side of the bag insertion gap; an air nozzle (5) slidably installed in the bag insertion gap, a driving mechanism for driving the air nozzle (5) to slide forward and backward, an air path switching mechanism (6) and at least one vacuum pump (24) are arranged in the lower seat (2); the vacuum pump (24) and the heat sealing assembly are respectively electrically connected to the control circuit; the driving mechanism is transmission-connected to the air nozzle (5); the air nozzle (5) is A suction port (51) is provided at the front end, a vent (52) is provided at the middle of the air nozzle (5) on one side facing the vacuum chamber (4), the air nozzle (5) is connected to the vacuum chamber (4) through the vent (52) during vacuuming, a sealing gasket (21) is provided at the rear side of the vacuum chamber (4), the sealing gasket (21) and the vent (52) are in sealing cooperation during sealing, the vacuum pump (24) is connected to the air path switching mechanism (6), and the air path switching mechanism (6) is connected to the air nozzle (5) or the vacuum chamber (4); A locking cover mechanism (7) is provided on the left and right sides of the lower seat (2), respectively; a connecting buckle (11) is provided on the left and right sides of the upper cover (1) and is buckledly connected to the locking cover mechanism (7); the vacuum chamber (4) is provided with at least one pressure relief port (41), and at least one locking cover mechanism (7) is sealed and matched with the pressure relief port (41).

2. An improved multifunctional vacuum sealer according to claim 1, characterized in that: The driving mechanism comprises a driving motor (53), a reduction assembly (54), a driving gear (55), a driving rack (56) and a detection assembly for detecting the position of the air nozzle (5); the driving motor (53) is transmission-connected to the reduction assembly (54); the reduction assembly (54) is transmission-connected to the driving gear (55); the driving gear (55) is meshed with the driving rack (56); and the driving rack (56) is transmission-connected to the air nozzle (5).

3. An improved multifunctional vacuum sealer according to claim 2, characterized in that: The detection component comprises a PCB board (57) and three optical coupling sensors (58); the PCB board (57) is fixedly mounted on one side of the driving rack (56); the three optical coupling sensors (58) are arranged on the PCB board (57) at intervals along the sliding direction of the air nozzle (5); the three optical coupling sensors (58) are electrically connected to the control circuit via the PCB board (57); a detection unit (561) is arranged on one side of the driving rack (56) adjacent to the PCB board (57); the detection unit (561) is triggered and matched with the three optical coupling sensors (58) respectively.

4. An improved multifunctional vacuum sealer according to claim 3, characterized in that: The air nozzle (5) is provided with an air extraction position, a sealing position and a storage position. When the air nozzle (5) is in the air extraction position, the air nozzle (5) passes through the vacuum extraction chamber (4) and the heat sealing assembly and extends out of the front side of the multifunctional vacuum sealing machine, the vent (52) is connected to the vacuum extraction chamber (4), and the detection unit (561) is triggered to cooperate with the first optical coupling sensor (58); When the air nozzle (5) is in the sealing position, the front end of the air nozzle (5) extends into the vacuum chamber (4), the sealing pad (21) blocks the vent (52), and the detection part (561) and the second optical coupling sensor (58) are triggered to cooperate; When the air nozzle (5) is in the storage position, the air nozzle (5) moves backward to the rear side of the vacuum chamber (4), and the detection part (561) and the third optical coupling sensor (58) are triggered to cooperate.

5. An improved multifunctional vacuum sealer according to claim 3, characterized in that: A gas nozzle mounting seat (22) is fixedly installed in the lower seat (2), the gas nozzle (5) is slidably installed on the gas nozzle mounting seat (22), the PCB board (57) is fixedly installed on one side of the gas nozzle mounting seat (22), a rack connecting seat (562) is arranged at the rear of the driving rack (56), a gas nozzle connecting seat (59) is arranged at the rear of the gas nozzle (5), the rack connecting seat (562) and the gas nozzle connecting seat (59) are rotatably connected, the rack connecting seat (562) or the gas nozzle connecting seat (59) is provided with an elliptical mounting sliding hole (591), the corresponding gas nozzle connecting seat (59) or the rack connecting seat (562) is provided with a rotating shaft (563), the rotating shaft (563) is inserted into the mounting sliding hole (591), and an elastic abutting piece (23) is arranged at the rear side of the sealing pad (21), and the elastic abutting piece (23) is matched with the gas nozzle (5) to abut against it.

6. An improved multifunctional vacuum sealer according to any one of claims 1 to 5, characterized in that: The gas path switching mechanism (6) comprises a switching cylinder (61) and a switching piston (62), the front portion of the switching piston (62) being slidably mounted in the switching cylinder (61), the rear end portion of the switching piston (62) being provided with a switching lever (621), the switching lever (621) extending out of the switching cylinder (61) and protruding out of the lower seat (2), the switching cylinder (61) being provided with an external interface (611), an air inlet (612), a switching interface (613) and an air outlet (614) in sequence and spaced apart along the length direction, the external interface (611) being connected to the atmosphere, the air inlet (612) being connected to the outlet of the vacuum pump (24), the air outlet (614) being connected to the inlet of the vacuum pump (24), the rear end portion of the air nozzle (5) being sealed, and the switching interface (613) being connected to the vacuum chamber (4); An outer wall of the switching piston (62) is provided with an air-inflating communication groove (622) and an air-exhausting communication groove (623) along the circumferential direction. The air-inflating communication groove (622) and the air-exhausting communication groove (623) are arranged at intervals along the length direction of the switching piston (62). The air-inflating communication groove (622) and the air-exhausting communication groove (623) are relatively sealed. When vacuuming, the switching interface (613) is connected to the air outlet (614) through the air extraction connecting groove (623), the external interface (611) is connected to the air inlet (612) through the inner cavity of the switching cylinder (61), and the external interface (611) is connected to the atmosphere; During inflation, the switching interface (613) is connected to the air inlet (612) via the inflation communication groove (622), and the air outlet (614) is connected to the atmosphere via the exhaust communication groove (623).

7. An improved multifunctional vacuum sealer according to claim 6, characterized in that: The locking cover mechanism (7) comprises a locking cover slider (71), a pressure relief rubber pad (72) and a return spring (73); the locking cover slider (71) is slidably mounted on the side of the lower seat (2) in a transverse manner; the locking cover slider (71) is snap-fitted with the corresponding connecting buckle (11); one end of the return spring (73) abuts against the lower seat (2) and the other end abuts against the locking cover slider (71); the pressure relief rubber pad (72) is fixedly mounted on the locking cover slider (71) and is sealed with the pressure relief port (41); when unlocking, the pressure relief rubber pad (72) is separated from the pressure relief port (41).

8. An improved multifunctional vacuum sealer according to claim 6, characterized in that: The vacuum chamber (4) is arranged on the front side of the lower seat (2); an elastic pressure seal (8) is arranged on the upper cover (1) at a position corresponding to the vacuum chamber (4); the elastic pressure seal (8) comprises a pressure plate (81) and a plurality of pressure springs (83); the pressure plate (81) is slidably mounted on the upper cover (1) and is located above the vacuum chamber (4); each pressure spring (83) is arranged at intervals between the pressure plate (81) and the upper cover (1); a circle of lower elastic sealing ring (42) is arranged on the outer edge of the vacuum chamber (4); a circle of upper elastic sealing ring (84) is arranged on the bottom surface of the pressure plate (81); the upper elastic sealing ring (84) is pressed against the lower elastic sealing ring (42) and is matched.

9. An improved multifunctional vacuum sealer according to claim 8, characterized in that: The heat sealing assembly comprises a heating strip (31) and an elastic sealing member, wherein the elastic sealing member comprises a sealing strip (32), a pressing rubber strip (33) and a plurality of sealing springs (34); the heating strip (31) is arranged on the front side of the lower seat (2) and is located on the front side of the vacuum chamber (4); the sealing strip (32) is slidably installed on the front side of the upper cover (1) and is located above the heating strip (31); the pressing rubber strip (33) is fixedly installed on the bottom surface of the sealing strip (32); the pressing rubber strip (33) and the heating strip (31) are pressed against each other, and each sealing spring (34) is arranged at intervals between the sealing strip (32) and the upper cover (1).

10. An improved multifunctional vacuum sealer according to claim 9, characterized in that: The vacuum chamber (4) is provided with a vacuum tube (43) and a plurality of bag blocking strips (44); the upper end of the vacuum tube (43) is in communication with the vacuum chamber (4); the lower end of the vacuum tube (43) is connected to the switching interface (613); the bag blocking strips (44) are arranged at intervals along the lateral direction on the rear inner wall of the vacuum chamber (4); the pressure plate (81) is provided with an avoidance groove (82) at a position corresponding to the bag blocking strip (44); the bag blocking strip (44) extends out of the vacuum chamber (4) and is inserted into the corresponding avoidance groove (82); The vacuum chamber (4) is also connected to a pressure sensor, which is electrically connected to the control circuit; the upper cover (1) or the lower seat (2) is provided with a plurality of control buttons (12) and indicator lights (13), and each control button (12) and indicator light (13) is electrically connected to the control circuit respectively; A spring cover assembly (9) is respectively arranged on the left and right sides of the lower seat (2), and the spring cover assembly (9) comprises a spring cover housing (91), a spring cover spring and a spring cover ball (92). The spring cover housing (91) is fixedly installed inside the lower seat (2), and the spring cover ball (92) is slidably installed in the spring cover housing (91) up and down, and the upper end of the spring cover ball (92) passes through the lower seat (2) and abuts against the upper cover (1). The spring cover spring is arranged inside the spring cover housing (91) and abuts against the spring cover ball (92).

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