A vacuum sealing machine with an improved locking cap structure

Abstract

This utility model discloses an improved vacuum sealing machine with a locking cap structure. During vacuuming and sealing, the upper cover and lower seat are pressed together by a locking cap device. The locking cap device includes a locking cap drive mechanism, a locking cap pin, and a locking cap socket. The locking cap pin is slidably installed on the upper cover or lower seat, and the corresponding locking cap socket is located on the lower seat or upper cover and on the movement trajectory of the locking cap pin. The locking cap drive mechanism is driven by the locking cap pin. The locking cap socket is provided with a locking cap hole, and the locking cap pin is inserted into the locking cap hole. During vacuuming and sealing, the locking cap pin presses tightly against the inner wall of the locking cap hole. The locking cap drive mechanism drives the locking cap pin to insert into the locking cap hole and press tightly against the locking cap socket, so that the upper cover and lower seat are pressed and locked, improving the locking force and preventing the buckle from breaking or popping open, which would cause the upper cover and lower seat to separate accidentally, thus improving reliability and stability.

Description

Technical Field

[0001] This utility model relates to the field of vacuum sealing machine technology, and in particular to a vacuum sealing machine with an improved locking cap structure. Background Technology

[0002] The vacuum sealing machine includes an upper cover and a lower base. The rear side of the upper cover is hinged to the lower base. When vacuum sealing, the upper cover needs to be locked to the lower base through the locking structure so that the vacuum grooves on the upper cover and the lower base are closed and sealed, and the vacuum packaging bag is clamped and fixed for vacuum sealing.

[0003] Existing locking mechanisms typically use latches for fastening. However, due to the small connection area between the latches, they are prone to breaking apart, resulting in low locking force and poor reliability and stability. Other mechanisms use hooks for locking, but these require significant force to press and rotate the hooks. While this increases the locking force, it is limited by the motor's torque, making it difficult to achieve automatic locking via electric drive. Therefore, improvements are necessary. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a vacuum sealing machine with an improved locking cap structure, which increases locking force, prevents accidental separation, improves reliability and stability, automatically locks and releases, and is convenient to use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a vacuum sealing machine with an improved locking cap structure, comprising an upper cap and a lower seat, the rear side of the upper cap being hinged to the upper part of the lower seat, the upper cap and / or the lower seat being provided with a vacuum groove, a heat sealing device being provided on the front side of the vacuum groove, a vacuum device being provided inside the upper cap or the lower seat, the vacuum device being connected to at least one vacuum groove, and the upper cap and the lower seat being pressed together by a locking cap device during vacuuming and sealing, the locking cap device comprising a locking cap drive mechanism, a locking cap pin, and a locking cap socket, the locking cap pin being slidably installed on the upper cap or the lower seat, the corresponding locking cap socket being provided on the lower seat or the upper cap and located on the movement trajectory of the locking cap pin, the locking cap drive mechanism being drivenly connected to the locking cap pin, the locking cap socket being provided with locking cap holes respectively, the locking cap pin being inserted into the locking cap holes, and the locking cap pin being pressed tightly against the inner wall of the locking cap hole during vacuuming and sealing.

[0006] In a further technical solution, the locking device is provided with two locking pins and two locking sockets. The two locking pins are slidably installed in the lower base and are located on both sides of the vacuum groove. The locking drive mechanism is located in the lower base and is connected to the two locking pins. The upper part of the two locking sockets is located in the upper cover. The lower part of the upper cover is provided with two upper through holes. The lower part of the two locking sockets protrudes from the lower end face of the upper cover through the upper through holes. The locking hole is opened in the lower part of the locking socket. The upper part of the lower base is provided with two lower through holes. When the upper cover is closed, the lower part of the two locking sockets is inserted into the lower base through the two lower through holes.

[0007] In a further technical solution, a lock cover guide slope is provided at one end of the lock cover pin near the lock cover socket, and the lock cover guide slope is tightly pressed against the inner wall of the lock cover hole.

[0008] In a further technical solution, the lower part of the lock cover socket is provided with a lock cover groove with an opening facing downwards. A lock cover guide wheel is rotatably installed at the opening of the lock cover groove. The lock cover guide wheel and the inner wall of the lock cover groove form a lock cover hole. The lock cover guide slope is rolled into fit with the lock cover guide wheel.

[0009] In a further technical solution, the upper part of the locking socket is rotated and installed inside the upper cover. The locking device is also provided with an elastic component, which is located between the upper cover and the locking socket. One end of the elastic component abuts against the upper cover and the other end abuts against the locking socket.

[0010] In a further technical solution, the cross-section of the locking socket gradually decreases from top to bottom, and the front and rear sides of the locking socket are inclined inward to form two socket guide slopes.

[0011] In a further technical solution, the cover-locking drive mechanism includes a cover-locking drive motor, a synchronizing rod, and two cover-locking transmission gears. The cover-locking drive motor is fixedly installed in the lower base, the synchronizing rod is rotatably installed in the lower base, and both ends of the synchronizing rod extend to two cover-locking pins respectively. The two cover-locking transmission gears are fixedly installed at both ends of the synchronizing rod. The cover-locking drive motor is connected to the synchronizing rod for transmission. The two cover-locking pins have racks on the side facing the cover-locking transmission gears, and the two cover-locking transmission gears mesh with the racks of the two cover-locking pins for transmission.

[0012] In a further technical solution, the lower base is provided with two downward-facing locking cover grooves, and two locking cover pins are slidably installed in the locking cover grooves. The locking cover transmission gear is located below the locking cover pins, and an anti-jamming groove is provided on the upper part of the locking cover pins. Multiple anti-jamming rollers are spaced apart along the length of the locking cover pins in the anti-jamming groove, and each anti-jamming roller is rolled into contact with the upper wall of the locking cover groove.

[0013] In a further technical solution, the locking cover device is provided with a locking trigger switch and an unlocking trigger switch. The locking trigger switch is fixedly installed on the side of any one of the locking cover pins. The locking cover pin located on the side of the locking trigger switch is provided with a locking trigger protrusion, which engages with the locking trigger switch.

[0014] The unlock trigger switch is fixedly installed on the rear side of any one of the lock cover pins, and the rear end of the lock cover pin is engaged with the unlock trigger switch.

[0015] The upper cover or lower base is equipped with a control circuit, and the heat sealing device, vacuum device, cover locking drive motor, locking trigger switch and unlocking trigger switch are electrically connected to the control circuit.

[0016] In a further technical solution, the vacuum pumping device includes a pressure relief solenoid valve, a reversing solenoid valve, a pressure sensor, and at least one vacuum pump. One end of the pressure relief solenoid valve is connected to the vacuum pumping tank, and the other end is connected to the atmosphere. The output end of the reversing solenoid valve is connected to the vacuum pumping tank. The inlet end of the reversing solenoid valve is connected to the outlet of the vacuum pump, and the outlet end of the reversing solenoid valve is connected to the inlet of the vacuum pump. The pressure sensor is connected to the vacuum pumping tank. The pressure relief solenoid valve, the reversing solenoid valve, the vacuum pump, and the pressure sensor are electrically connected to the control circuit.

[0017] The vacuum sealing machine is also equipped with an air pipe and a telescopic drive mechanism. The air pipe is slidably installed on the upper part of the lower seat in the front-back direction. The telescopic drive mechanism is connected to the air pipe. The front end of the air pipe is provided with a front air hole, the middle part of the air pipe is provided with a vent hole, and the rear end of the air pipe is sealed. When vacuuming smooth bags, the vent hole is connected to the vacuuming groove. When vacuuming textured bags, the air pipe moves backward to outside the vacuuming groove.

[0018] The advantages of this invention compared to existing technologies are as follows: the locking cover drive mechanism drives the locking cover pin to insert into the locking cover hole and press tightly against the locking cover socket, thereby pressing the upper cover and lower seat together to lock, increasing the locking force, preventing the buckle from breaking or popping open and causing the upper cover and lower seat to separate unexpectedly, thus improving reliability and stability; the locking cover pin moves horizontally, requiring no large rotation space, reducing the size, and reducing the torque requirement on the locking cover drive mechanism, automatically locking and releasing without manual pressing, thus improving ease of use. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 This is the utility model Figure 1 Enlarged view of part A;

[0022] Figure 3 This is a schematic diagram of the internal structure of the lower seat in Embodiment 1 of this utility model;

[0023] Figure 4 This is the utility model Figure 3 Enlarged view of part B;

[0024] Figure 5 This is a cross-sectional view of Embodiment 1 of this utility model when the top cover is opened;

[0025] Figure 6 This is a cross-sectional view of Embodiment 1 of this utility model during the closing of the upper cover;

[0026] Figure 7 This is a cross-sectional view of Embodiment 1 of this utility model when the top cover is locked;

[0027] Figure 8 This is a cross-sectional view of Embodiment 2 of this utility model when the top cover is locked;

[0028] Figure 9 This is a cross-sectional view of Embodiment 3 of this utility model when the top cover is locked.

[0029] In the picture:

[0030] 1. Top cover; 11. Top perforation;

[0031] 2 lower seats, 21 lower perforations, 22 lock cover chute;

[0032] 31 Vacuum tank; 32 Heat sealing device;

[0033] 41 Pressure relief solenoid valve, 42 Reversing solenoid valve, 43 Vacuum pump;

[0034] 5. Locking cover pin, 51. Locking cover guide slope, 52. Rack, 53. Anti-jamming groove, 54. Anti-jamming roller, 55. Locking trigger protrusion;

[0035] 6. Locking cover socket, 61. Locking cover hole, 62. Socket guide slope, 63. Locking cover guide wheel, 64. Flexible component;

[0036] 71 Locking cover drive motor, 72 Synchronizing rod, 73 Locking cover transmission gear;

[0037] 81 Locking trigger switch; 82 Unlocking trigger switch;

[0038] 91. Air tube, 911. Front air vent, 912. Vent hole, 92. Telescopic drive mechanism. Detailed Implementation

[0039] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0040] Example 1

[0041] A vacuum sealing machine with an improved locking cap structure, such as Figures 1 to 7 As shown, the device includes an upper cover 1 and a lower base 2. The rear side of the upper cover 1 is hinged to the upper part of the lower base 2. Both the upper cover 1 and the lower base 2 are provided with vacuum grooves 31. Each vacuum groove 31 is surrounded by a sealing ring. When sealing, the two vacuum grooves 31 close to form a sealed vacuum chamber. A heat sealing device 32 is provided on the front side of the vacuum groove 31. The heat sealing device 32 includes a heating strip and an adhesive strip. The heating strip is located on the lower base 2, and the adhesive strip is located on the upper cover 1. When sealing, the heating strip and the adhesive strip are tightly pressed together. A vacuum device is provided inside the lower base 2 and is connected to the vacuum groove 31 of the lower base 2. During vacuuming and sealing, the upper cover 1 and the lower base 2 are pressed together by a locking device. The locking device includes a locking drive mechanism, two locking pins 5, and two locking sockets 6. The two locking pins 5 are slidably installed on the lower base. The two locking caps are located inside the lower seat 2 and on both sides of the vacuum tank 31. The locking cap drive mechanism is located inside the lower seat 2 and is connected to the two locking cap pins 5. The upper part of the two locking cap sockets 6 is located inside the upper cover 1. The lower part of the upper cover 1 is provided with two upper through holes 11. The lower part of the two locking cap sockets 6 protrudes from the lower end face of the upper cover 1 through the upper through holes 11. The locking cap hole 61 is opened in the lower part of the locking cap socket 6. The upper part of the lower seat 2 is provided with two lower through holes 21. When the upper cover 1 is closed, the lower part of the two locking cap sockets 6 is inserted into the lower seat 2 through the two lower through holes 21. The two locking cap sockets 6 are located on the movement trajectory of the two locking cap pins 5. The two locking cap sockets 6 are respectively provided with locking cap holes 61. The two locking cap pins 5 are respectively engaged with the two locking cap holes 61. During vacuuming and sealing, the locking cap pins 5 press tightly against the inner wall of the locking cap hole 61. Traditional vacuum sealing machines typically use snap-on or hook-on locking mechanisms. Snap-on mechanisms have a small connection area and rely on deformation, leading to material fatigue over time, resulting in snap breakage and wear, low locking force, and poor reliability and stability. Hook-on mechanisms require significant driving force for pressing, often requiring manual operation and failing to achieve automatic locking. This invention, however, uses a locking mechanism to drive the locking pin 5 into the locking hole 61 and press it firmly against the locking socket 6, thus locking the upper cover 1 and lower seat 2 together. This increases the locking force, preventing snap breakage or disengagement that could cause accidental separation of the upper cover 1 and lower seat 2, improving reliability and stability. The locking pin 5 moves horizontally, requiring minimal rotation space, reducing size, and lowering the torque requirements of the locking mechanism. Automatic locking and releasing eliminates the need for manual pressing, improving ease of use. Two locking pins 5 and two locking sockets 6 lock both sides of the vacuum sealing machine, preventing uneven force on the upper cover 1 caused by unilateral locking and ensuring the airtightness of the vacuum chamber.

[0042] Specifically, a locking cover guide slope 51 is provided at one end of the locking cover pin 5 adjacent to the locking cover socket 6, and the locking cover guide slope 51 is tightly fitted with the inner wall of the locking cover hole 61. The locking cover guide slope 51 makes the outer diameter of the end of the locking cover pin 5 adjacent to the locking cover socket 6 smaller than the outer diameter of the end away from the locking cover socket 6. When locking, the locking cover guide slope 51 plays a guiding role, and as the locking cover pin 5 moves, it gradually pulls the upper cover 1 downward to lock it, and the locking force increases linearly.

[0043] Specifically, the lower part of the locking socket 6 is provided with a downward-facing locking groove. A locking guide wheel 63 is rotatably mounted at the opening of the locking groove. The locking guide wheel 63 and the inner wall of the locking groove form a locking hole 61. The locking guide slope 51 and the locking guide wheel 63 are rolled together. The locking guide wheel 63 reduces the friction between the locking socket 6 and the locking guide slope 51, preventing jamming and reducing driving force.

[0044] Specifically, the upper part of the locking socket 6 is rotatably installed inside the upper cover 1. The locking device also includes a spring-loaded component 64, which is positioned between the upper cover 1 and the locking socket 6. One end of the spring-loaded component 64 abuts against the upper cover 1, and the other end abuts against the locking socket 6. The locking socket 6 is rotatably installed on the upper cover 1, as shown below. Figure 5 As shown, in the initial state when the top cover 1 is open, the locking socket 6 rotates backward under the action of the elastic component 64, so that the angle between the locking socket 6 and the top cover 1 is less than 90°. This ensures that during the process of closing the top cover 1, as... Figure 6 As shown, the locking cover socket 6 is nearly perpendicular to the lower seat 2 before being inserted into the lower through hole 21. This allows the locking cover socket 6 to be inserted into the lower through hole 21 at a near-vertical angle, reducing the inner diameter of the lower through hole 21. This not only prevents large impurities from entering the lower through hole 21 but also improves aesthetics and prevents the locking cover pin 5 from being exposed. Before locking, the locking cover pin 5 always remains on the rear side of the lower through hole 21. The elastic component 64 uses elastic elements such as torsion springs, springs, spring plates, and elastic rubber strips.

[0045] Specifically, the cross-section of the locking socket 6 gradually decreases from top to bottom, and the front and rear sides of the locking socket 6 are inclined inward to form two socket guide slopes 62. For example... Figure 6 As shown, during the closing of the upper cover 1, the locking cover socket 6 is guided by two socket guide ramps 62 to ensure that the locking cover socket 6 can be accurately inserted into the lower through hole 21, avoiding interference and jamming when closing the upper cover 1.

[0046] Specifically, the cover-locking drive mechanism includes a cover-locking drive motor 71, a synchronizing rod 72, and two cover-locking transmission gears 73. The cover-locking drive motor 71 is fixedly installed inside the lower base 2, and the synchronizing rod 72 is rotatably installed inside the lower base 2. Both ends of the synchronizing rod 72 extend to two cover-locking pins 5, and the two cover-locking transmission gears 73 are fixedly installed at both ends of the synchronizing rod 72. The cover-locking drive motor 71 is connected to the synchronizing rod 72 for transmission. A rack 52 is provided on the side of each of the two cover-locking pins 5 facing the cover-locking transmission gears 73, and the two cover-locking transmission gears 73 mesh with the racks 52 of the two cover-locking pins 5 for transmission. The cover-locking drive motor 71 drives the synchronizing rod 72 to rotate through at least two gears. One gear is fixed on the output shaft of the cover-locking drive motor 71, and the other gear is fixed on the synchronizing rod 72. The two gears mesh with each other. The synchronizing rod 72 simultaneously drives the two cover-locking transmission gears 73 to rotate, and the cover-locking transmission gears 73 then drive the cover-locking pins 5 to move through the racks 52. The structure is simple, low-cost, and occupies little space. The teeth of the rack 52 are directly formed on the locking cover pin 5 to form the rack 52.

[0047] Specifically, the lower base 2 has two downward-facing locking cover grooves 22. Two locking cover pins 5 are slidably installed in the locking cover grooves 22, and a locking cover drive gear 73 is located below the locking cover pins 5. An anti-jamming groove 53 is provided on the upper part of the locking cover pins 5. Multiple anti-jamming rollers 54 are spaced apart along the length of the locking cover pins 5 within the anti-jamming groove 53, and each anti-jamming roller 54 rolls against the upper wall of the locking cover groove 22. The locking cover groove 22 limits the locking cover pins 5 to ensure they can move in the forward and backward direction. The anti-jamming rollers 54 reduce the friction between the locking cover pins 5 and the locking cover groove 22, making the movement of the locking cover pins 5 smoother, reducing noise, and lowering the torque of the locking cover drive motor 71. By accommodating the anti-jamming rollers 54 in the anti-jamming groove 53, with only the upper part of the anti-jamming rollers 54 extending out of the anti-jamming groove 53, the structure is more compact, further reducing installation space, material usage, weight, and cost. Both the anti-jamming roller 54 and the locking cover guide roller 63 are bearings to further reduce friction. Preferably, the bearings are wrapped with elastic silicone.

[0048] Specifically, the locking cover device is equipped with a locking trigger switch 81 and an unlocking trigger switch 82. The locking trigger switch 81 is fixedly installed on the side of the first locking cover pin 5. The first locking cover pin 5 is provided with a locking trigger protrusion 55, which engages with the locking trigger switch 81. The unlocking trigger switch 82 is fixedly installed on the rear side of the second locking cover pin 5, and the rear end of the second locking cover pin 5 engages with the unlocking trigger switch 82. A control circuit is provided in the lower base 2. The heat sealing device 32, the vacuum device, the locking cover drive motor 71, the locking trigger switch 81, and the unlocking trigger switch 82 are electrically connected to the control circuit. The position of the cover pin 5 is detected by the locking trigger switch 81 and the unlocking trigger switch 82 respectively. During vacuuming and sealing, the cover drive motor 71 drives the cover pin 5 forward until the locking trigger protrusion 55 abuts against the locking trigger switch 81. The locking trigger switch 81 sends a trigger signal to the control circuit, which then controls the cover drive motor 71 to stop or maintain a stall voltage. After vacuuming and sealing are completed, the cover drive motor 71 rotates to drive the cover pin 5 backward until the rear end of the cover pin 5 abuts against the unlocking trigger switch 82. The unlocking trigger switch 82 sends a trigger signal to the control circuit, which then controls the cover drive motor 71 to stop. This achieves automated control and limit switching, eliminating the need for manual motor starting and stopping, and simplifying operation.

[0049] Specifically, the vacuum pumping device includes a pressure relief solenoid valve 41, a reversing solenoid valve 42, a pressure sensor, and at least one vacuum pump 43. One end of the pressure relief solenoid valve 41 is connected to the vacuum tank 31, and the other end is open to the atmosphere. The output end of the reversing solenoid valve 42 is connected to the vacuum tank 31, the inlet end of the reversing solenoid valve 42 is connected to the outlet end of the vacuum pump 43, and the outlet end of the reversing solenoid valve 42 is connected to the inlet end of the vacuum pump 43. The pressure sensor is connected to the vacuum tank 31. The pressure relief solenoid valve 41, the reversing solenoid valve 42, and the vacuum pump 43 are all connected together. The pressure sensor is electrically connected to the control circuit. The vacuum sealing machine is also equipped with an air pipe 91 and a telescopic drive mechanism 92. The air pipe 91 is slidably installed on the upper part of the lower seat 2 in the front-back direction. The telescopic drive mechanism 92 is connected to the air pipe 91 in a transmission manner. The front end of the air pipe 91 is provided with a front air hole 911, the middle part of the air pipe 91 is provided with a vent hole 912, and the rear end of the air pipe 91 is sealed. When vacuuming the smooth bag, the vent hole 912 is connected to the vacuuming groove 31. When vacuuming the textured bag, the air pipe 91 moves backward to outside the vacuuming groove 31. During vacuuming and sealing, when the locking trigger switch 81 is triggered, the control circuit synchronously controls the pressure relief solenoid valve 41 to close, maintaining the vacuum chamber's seal. After vacuuming and sealing are completed, when the unlocking trigger switch 82 is triggered, the control circuit synchronously controls the pressure relief solenoid valve 41 to open, thereby depressurizing the vacuum chamber and facilitating the opening of the top cover 1. The unlocking trigger switch 82 and the locking trigger switch 81 are linked to control the opening and closing of the pressure relief solenoid valve 41, improving the level of automation. The reversing solenoid valve 42 switches the airflow direction of the vacuum pump 43, thereby achieving vacuuming and gas filling of the vacuum chamber, realizing the gas filling function. Preferably, during gas filling, a nitrogen gas source is connected to the air inlet of the vacuum pump 43, thereby achieving nitrogen filling for preservation and enriching the functions of the vacuum sealing machine.

[0050] Vacuum packaging bags on the market are divided into textured bags and smooth bags. When vacuuming or inflating textured bags, the bag opening is placed into the vacuuming groove 31. Vacuuming or inflating the vacuuming groove 31 is then performed to vacuum or inflate the packaging bag. At this time, the telescopic drive mechanism 92 drives the air pipe 91 to move backward, so that the air pipe 91 moves out of the vacuuming groove 31. However, when vacuuming or inflating smooth bags, the telescopic drive mechanism 92 drives the air pipe 91 to move forward, so that the air pipe 91 passes through the vacuuming groove 31 and the heat sealing device 32 and is inserted into the vacuum packaging bag. At this time, the vent 912 is located in the vacuuming chamber, so that the air pipe 91 establishes an air passage connection between the vacuum packaging bag and the vacuuming groove 31. Vacuuming or inflating the vacuuming groove 31 can vacuum or inflate the smooth bag, so that the vacuum sealing machine of this utility model is applicable to both smooth bags and textured bags. The telescopic drive mechanism 92 consists of a motor, a reduction gear set, and a lead screw. The motor is connected to the reduction gear set, and the reduction gear set is connected to the air pipe 91 via the lead screw.

[0051] Example 2

[0052] A vacuum sealing machine with an improved locking cap structure, such as Figure 8 As shown, the structure of the vacuum sealing machine in this embodiment is the same as that in the first embodiment. The difference is that the upper part of the locking socket 6 in this embodiment is fixed or integrally formed in the upper cover 1, and the inner wall of the upper through hole 11 abuts against the outer side of the locking socket 6. There is no need to set the elastic component 64. Compared with the first embodiment, the inner diameter of the lower through hole 21 is relatively large, but the structure is simpler, further reducing the cost.

[0053] Example 3

[0054] A vacuum sealing machine with an improved locking cap structure, such as Figure 9 As shown, the structure of the vacuum sealing machine in this embodiment is the same as that in embodiment two. The difference is that the upper part of the locking socket 6 in this embodiment is fixed or integrally formed on the lower end face of the upper cover 1, and there is no need to open the upper through hole 11. Compared with embodiment two, the structure is further simplified and the cost is reduced.

[0055] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A vacuum sealing machine with an improved locking cap structure, comprising an upper cover (1) and a lower seat (2), wherein the rear side of the upper cover (1) is hinged to the upper part of the lower seat (2), the upper cover (1) and / or the lower seat (2) are provided with a vacuum groove (31), a heat sealing device (32) is provided on the front side of the vacuum groove (31), a vacuum device is provided inside the upper cover (1) or the lower seat (2), the vacuum device is connected to at least one vacuum groove (31), and the upper cover (1) and the lower seat (2) are pressed together by the locking cap device during vacuuming and sealing, characterized in that: The locking device includes a locking drive mechanism, a locking pin (5) and a locking socket (6). The locking pin (5) is slidably installed on the upper cover (1) or the lower seat (2). The corresponding locking socket (6) is set on the lower seat (2) or the upper cover (1) and is located on the movement trajectory of the locking pin (5). The locking drive mechanism is connected to the locking pin (5) in a transmission manner. The locking socket (6) is provided with a locking hole (61). The locking pin (5) is inserted into the locking hole (61). During vacuuming and sealing, the locking pin (5) presses tightly against the inner wall of the locking hole (61).

2. The vacuum sealing machine with an improved locking cap structure according to claim 1, characterized in that: The locking device is provided with two locking pins (5) and two locking sockets (6). The two locking pins (5) are slidably installed in the lower seat (2) and located on both sides of the vacuum groove (31). The locking drive mechanism is located in the lower seat (2) and is connected to the two locking pins (5). The upper part of the two locking sockets (6) is located in the upper cover (1). The lower part of the upper cover (1) is provided with two upper through holes (11). The lower part of the two locking sockets (6) protrudes from the lower end face of the upper cover (1) through the upper through holes (11). The locking hole (61) is opened in the lower part of the locking socket (6). The upper part of the lower seat (2) is provided with two lower through holes (21). When the upper cover (1) is closed, the lower part of the two locking sockets (6) is inserted into the lower seat (2) through the two lower through holes (21).

3. A vacuum sealing machine with an improved locking cap structure according to claim 2, characterized in that: The locking pin (5) is provided with a locking guide slope (51) at one end near the locking socket (6), and the locking guide slope (51) is tightly fitted with the inner wall of the locking hole (61).

4. A vacuum sealing machine with an improved locking cap structure according to claim 3, characterized in that: The lower part of the lock cover socket (6) is provided with a lock cover groove with the opening facing downward. A lock cover guide wheel (63) is rotatably installed at the opening of the lock cover groove. The lock cover guide wheel (63) and the inner wall of the lock cover groove form the lock cover hole (61). The lock cover guide slope (51) is rolled into fit with the lock cover guide wheel (63).

5. A vacuum sealing machine with an improved locking cap structure according to claim 2, characterized in that: The upper part of the locking socket (6) is rotatably installed inside the upper cover (1). The locking device is also provided with an elastic component (64). The elastic component (64) is located between the upper cover (1) and the locking socket (6). One end of the elastic component (64) abuts against the upper cover (1) and the other end abuts against the locking socket (6).

6. A vacuum sealing machine with an improved locking cap structure according to claim 5, characterized in that: The cross-section of the locking socket (6) gradually decreases from top to bottom, and the front and rear sides of the locking socket (6) are inclined inward to form two socket guide slopes (62).

7. A vacuum sealing machine with an improved locking cap structure according to any one of claims 2 to 6, characterized in that: The cover driving mechanism includes a cover driving motor (71), a synchronizing rod (72), and two cover transmission gears (73). The cover driving motor (71) is fixedly installed in the lower seat (2), and the synchronizing rod (72) is rotatably installed in the lower seat (2). The two ends of the synchronizing rod (72) extend to the two cover pins (5), and the two cover transmission gears (73) are fixedly installed at the two ends of the synchronizing rod (72). The cover driving motor (71) is connected to the synchronizing rod (72) for transmission. The two cover pins (5) are provided with racks (52) on the side facing the cover transmission gears (73), and the two cover transmission gears (73) mesh with the racks (52) of the two cover pins (5) for transmission.

8. A vacuum sealing machine with an improved locking cap structure according to claim 7, characterized in that: The lower seat (2) is provided with two downward-facing locking cover grooves (22). The two locking cover pins (5) are slidably installed in the locking cover grooves (22) respectively. The locking cover transmission gear (73) is located below the locking cover pins (5). The upper part of the locking cover pins (5) is provided with an anti-jamming groove (53). Multiple anti-jamming rollers (54) are spaced apart along the length of the locking cover pins (5) in the anti-jamming groove (53). Each anti-jamming roller (54) is rolled into contact with the upper wall of the locking cover groove (22).

9. A vacuum sealing machine with an improved locking cap structure according to claim 7, characterized in that: The locking device is provided with a locking trigger switch (81) and an unlocking trigger switch (82). The locking trigger switch (81) is fixedly installed on the side of any one of the locking cover pins (5). The locking cover pin (5) located on the side of the locking trigger switch (81) is provided with a locking trigger protrusion (55). The locking trigger protrusion (55) is triggered and engaged with the locking trigger switch (81). The unlocking trigger switch (82) is fixedly installed on the rear side of any one of the lock cover pins (5), and the rear end of the lock cover pin (5) is triggered by the unlocking trigger switch (82); A control circuit is provided inside the upper cover (1) or the lower seat (2), and the heat sealing device (32), the vacuuming device, the lock cover drive motor (71), the lock trigger switch (81) and the unlock trigger switch (82) are electrically connected to the control circuit respectively.

10. A vacuum sealing machine with an improved locking cap structure according to claim 9, characterized in that: The vacuuming device includes a pressure relief solenoid valve (41), a reversing solenoid valve (42), a pressure sensor, and at least one vacuum pump (43). One end of the pressure relief solenoid valve (41) is connected to the vacuuming tank (31), and the other end is connected to the atmosphere. The output end of the reversing solenoid valve (42) is connected to the vacuuming tank (31). The inlet end of the reversing solenoid valve (42) is connected to the outlet of the vacuum pump (43). The outlet end of the reversing solenoid valve (42) is connected to the inlet of the vacuum pump (43). The pressure sensor is connected to the vacuuming tank (31). The pressure relief solenoid valve (41), the reversing solenoid valve (42), the vacuum pump (43), and the pressure sensor are electrically connected to the control circuit. The vacuum sealing machine is also equipped with an air pipe (91) and a telescopic drive mechanism (92). The air pipe (91) is slidably installed on the upper part of the lower seat (2) in the front-back direction. The telescopic drive mechanism (92) is connected to the air pipe (91) in a transmission manner. The front end of the air pipe (91) is provided with a front air hole (911), the middle part of the air pipe (91) is provided with a vent hole (912), and the rear end of the air pipe (91) is sealed. When vacuuming the smooth bag, the vent hole (912) is connected to the vacuuming groove (31). When vacuuming the textured bag, the air pipe (91) moves backward to outside the vacuuming groove (31).

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