An in-draw vacuum packaging machine

Abstract

The utility model provides a kind of inner extraction vacuum packaging machine, including shell, the shell has a cavity, suction part is arranged in the cavity in the way of suspension, the suction part has a recess, cover is arranged on the recess, driving assembly is arranged in the cavity, the driving assembly is connected with the cover and is arranged in the bottom of the suction part in the way of suspension, the driving assembly is used to drive the cover rotate around the first side of the shell. The utility model embodiment can realize the automatic opening or closure of the cover of vacuum packaging machine, simple structure and convenient operation, and also can prevent the cover from bruising operator when pressing down, and the cover can also be opened manually when unexpected power failure occurs during lid closing work.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging machines, and more specifically, to an internal vacuum packaging machine. Background Technology

[0002] Vacuum packaging involves sealing unsealed packaging by drawing a vacuum in a vacuum chamber. Vacuum-packaged food can significantly extend its shelf life. Currently, vacuum packaging machines include a turntable with multiple vacuum chambers around its outer circumference, corresponding to processes such as bag loading, lid closing, vacuuming, heat sealing, cooling, venting, and lid opening. Existing internal vacuum packaging machines have complex lid opening and closing structures, making precise control impossible and posing safety hazards. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an internal vacuum packaging machine.

[0004] In view of this, the present utility model provides an internal vacuum packaging machine, including a housing, the housing having a cavity, a suction part being suspended in the cavity, the suction part having a recess, a cover being provided on the recess, a driving assembly being provided in the cavity, the driving assembly being connected to the cover and suspended at the bottom of the suction part, the driving assembly being used to drive the cover to rotate around a first side of the housing.

[0005] In some embodiments, the drive assembly includes a drive device and two transmission assemblies connected to each other, the drive device being disposed between the two transmission assemblies, and the two transmission assemblies being respectively connected to both sides of the cover.

[0006] In some embodiments, the transmission assembly includes a rotating shaft, a telescopic rod, and a rocker arm. The drive device is connected to the rotating shaft. An oscillating member that rotates about the axis of the rotating shaft is provided at the end of the rotating shaft. The oscillating member is rotatably connected to a first end of the telescopic rod, and a second end of the telescopic rod is rotatably connected to a first end of the rocker arm.

[0007] In some embodiments, the drive device is connected to one end of the rotating shaft located on one side thereon, and the other end of the rotating shaft is connected to the first end of the telescopic rod.

[0008] In some embodiments, the two rotating shafts located on both sides of the drive device are coaxially arranged, or the two rotating shafts located on both sides of the drive device are integrally formed into a main rotating shaft, and the drive device is mounted on the main rotating shaft.

[0009] In some embodiments, the rocker arm has an arc-shaped structure, and the arc shape matches the rotation trajectory of the cover.

[0010] In some embodiments, the telescopic rod includes an outer tube with a connecting hole at its end, an inner tube movably disposed inside the outer tube, a connecting groove at its end, an end of the swing member pivotally connected to the connecting hole via a fastener, and a first end of the rocker arm inserted into the connecting groove and pivotally connected to the groove wall via a fastener.

[0011] In some embodiments, the cover includes a cover connecting portion and a cover main body portion, the cover main body portion being connected to the rocker arm via the cover connecting portion.

[0012] In some embodiments, the cover connecting portion extends along the length direction of the first side of the housing, and its two ends are respectively connected to the two rocker arms. A cover mounting bracket is provided in the middle of the cover connecting portion and is rotatably connected to the bottom of the suction portion through the cover mounting bracket.

[0013] In some embodiments, a speed reduction device is provided between the drive device and the rotating shaft, and a coupling is provided between the output shaft of the speed reduction device and the rotating shaft.

[0014] In some embodiments, the transmission assembly further includes a detection device for detecting the degree of rotation of the shaft.

[0015] In some embodiments, the transmission assembly further includes a limiting device for limiting the rotation range of the shaft.

[0016] In some embodiments, the drive device has a self-locking function.

[0017] In some embodiments, a pump body is further provided in the cavity, and a suction port is provided at the bottom of the recess, the suction port being connected to the pump body.

[0018] In some embodiments, the housing has a base plate and a plurality of sidewalls are provided around the base plate, the sidewalls being sequentially connected and cooperating with the base plate to form the cavity.

[0019] In some embodiments, a sealing platform is provided on the side wall located on the second side of the housing, the sealing platform being partially opposite to the cover body, and a control console is provided on the outer side of the second side of the housing.

[0020] This utility model embodiment enables the automatic opening or closing of the lid of the vacuum packaging machine. During normal use, there is no need for manual lifting to open the lid. The structure is simple and easy to operate. At the same time, it can also prevent the lid from accidentally closing and injuring the operator. In the event of an accidental power failure during lid closing, the lid can be manually opened to remove the packaged items. It has high safety and convenient operation.

[0021] To make the above-mentioned objects, features and advantages of the present utility model embodiments more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and are used, together with the description and claims, to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The drawings described herein are provided to offer a further understanding of the invention and form part of this application. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the vacuum packaging machine provided in this embodiment of the utility model;

[0024] Figure 2 This is a side view of one of the vacuum packaging machines provided in this embodiment of the utility model;

[0025] Figure 3 This is a second side view of the vacuum packaging machine provided in this embodiment of the present invention (after removing the cover);

[0026] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the vacuum packaging machine provided in this embodiment of the utility model;

[0027] Figure 5 This is a second perspective view of the internal structure of the vacuum packaging machine provided in this embodiment of the utility model;

[0028] Figure 6 This is a side view of the internal structure of the vacuum packaging machine provided in this embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the drive assembly in the vacuum packaging machine provided in this embodiment of the utility model;

[0030] Figure 8 This is a side view of the drive assembly in the vacuum packaging machine provided in this embodiment of the utility model;

[0031] Figure 9 This is a rear view of the drive assembly in the vacuum packaging machine provided in this embodiment of the utility model;

[0032] Figure 10 This is a schematic diagram of the telescopic rod in the drive assembly of the vacuum packaging machine provided in this embodiment of the utility model.

[0033] The above figures include the following reference numerals:

[0034] 1-Shell; 11-Base plate; 12-Side wall; 2-Suction section; 21-Recess; 22-Cover; 221-Cover connection; 222-Cover main body; 23-Suction port; 3-Pump body; 4-Drive assembly; 41-Drive device; 42-Rotating shaft; 421-Swinging component; 43-Telescopic rod; 431-Outer sleeve; 432-Connecting hole; 433-Inner tube; 434-Connecting groove; 435-Positioning pin; 436-Slide groove; 44-Rock arm; 45-Reduction gear; 46-Coupling; 47-Detection device; 5-Control console. Detailed Implementation

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0036] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0037] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0038] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0039] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0040] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0041] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0044] This utility model embodiment provides an internal vacuum packaging machine, such as... Figures 1 to 9 As shown, it includes a housing 1, which is, for example, in the shape of a cuboid or a cube. The housing 1 has a base plate 11, which can be, for example, rectangular. A plurality of side walls 12 are provided around the base plate 11. The plurality of side walls 12 are connected in sequence and cooperate with the base plate 11 to form a cavity. The cavity has a predetermined depth.

[0045] Furthermore, the cavity is equipped with a suction section 2 and a pump body 3. The suction section 2 is located on the upper end face of the side wall 12 and is suspended within the cavity. The suction section 2 has a recess 21 for accommodating the bag of the package. The cross-section of the recess 21 can be rectangular or arc-shaped. When the cross-section of the recess 21 is arc-shaped, its curved edge facilitates the placement of the package. The pump body 3 is driven, for example, by a motor or other device within the cavity.

[0046] Furthermore, the edge of the recess 21 is connected to the upper end face of the side wall 12 so that the suction part 2 can be suspended inside the cavity 3; a cover 22 is provided on the recess 21, and the cover 22 can be opened or closed relative to the recess 21 to close the recess 21, wherein, preferably, the cover 22 can rotate around the first side of the housing 1. Here, when the cover 22 is open, packaging can be placed and the bag opening of the packaging is pressed against the edge of the recess 21, and when it is necessary to suction the packaging, the cover 22 is closed.

[0047] Furthermore, a suction port 23 is provided at the bottom of the recess 21. The suction port 23 is connected to the pump body 3 located in the cavity through a pipe. The pump body 3 and the suction port 23 can be used to perform a vacuum operation in the recess 21.

[0048] Furthermore, a drive assembly 4 is provided inside the cavity. The drive assembly 4 is suspended at the bottom of the suction part 2, for example, by means of a mounting bracket. The drive assembly 4 is connected to the edge of the cover 22. The drive assembly 4 is used to drive the cover 22 to rotate around the first side of the housing 1.

[0049] Furthermore, a sealing platform is provided on the inner side of the side wall 12 on the second side of the housing 1, where the second side is the side opposite to the first side. When the package is placed in the recess 21, the bag opening of the package is placed on the sealing platform, and a seal is achieved by compression between the cover 22 and the sealing platform. Additionally, a control console 5 is provided on the outer side of the side wall 12 on the second side of the housing 1, through which the drive assembly 4 can be controlled, for example.

[0050] Specifically, the drive assembly 4 includes a drive device 41 and at least one transmission assembly connected to each other. The drive device 41 is disposed on the outer side of the bottom of the suction part 2, and the drive device 41 may be, for example, a motor. The drive device 41 can be connected to the transmission assembly, which is connected to the cover 22. The drive device 41 outputs torque to drive the transmission assembly to move, and then the transmission assembly drives the cover 22 to rotate, thereby realizing the opening or closing of the cover 22.

[0051] To increase the driving force on the cover 22, there can be two transmission components. The two transmission components are located at both ends of the bottom plate 11 of the housing 1, so that the cover 22 can be opened together by the two transmission components.

[0052] In this embodiment, the transmission assembly includes a rotating shaft 42, a telescopic rod 43, and a rocker arm 44 connected in sequence. The driving device 41 is connected to one end of the rotating shaft 42 to drive the rotating shaft 42 to rotate. The rotating shaft 42 can be mounted on the bottom outer side of the suction part 2, for example, by means of a mounting bracket.

[0053] Furthermore, a swing member 421 is provided at the other end of the rotating shaft 42. The swing member 421 can be, for example, an S-shaped structure or other suitable shape, which can rotate with the rotation of the rotating shaft 42. When the rotating shaft 42 rotates, it drives the swing member 421 to rotate around the axis of the rotating shaft 42. The rotating shaft 42 and the swing member 421 can be assembled separately or integrally formed.

[0054] Furthermore, the swing member 421 is connected to the first end of the rocker arm 44 via the telescopic rod 43, and the second end of the rocker arm 44 is connected to the cover 22. The rotation of the swing member 421 will cause the telescopic rod 43 to extend or retract, and the extension or retraction of the telescopic rod 43 will in turn cause the cover 22 to rotate via the rocker arm 44. Preferably, the rocker arm 44 has an arc-shaped structure, and the arc shape matches the rotation trajectory of the cover 22.

[0055] Furthermore, the first end of the telescopic rod 43 is rotatably connected to the swing member 421, and the second end of the telescopic rod 43 is rotatably connected to the first end of the rocker arm 44. In one embodiment, the telescopic rod 43 includes an outer tube 431, with a connecting hole 432 at its end. An inner tube 433 is movably disposed within the outer tube 431, and the telescopic rod 43 is telescopically extended by the movement of the inner tube 433 within the outer tube 431. The end of the inner tube 433 is provided with a connecting groove 434, which may be, for example, a U-shaped groove. The end of the swing member 421 is pivotally connected to the connecting hole 432 of the outer tube 431 by a fastener, and the first end of the rocker arm 44 is inserted into the connecting groove 434 and pivotally connected to the connecting groove 434 by a fastener. Thus, the rotation of the swing member 421 can drive the rotation of the rocker arm 44 through the telescopic movement of the telescopic rod 43.

[0056] Furthermore, such as Figure 10 As shown, in order to limit the range of movement of the inner tube 433 relative to the outer tube 431, a groove 436 is provided on the side of the outer tube 431, and a positioning pin 435 is provided at the end of the inner tube 433. The positioning pin 435 extends out of the groove 436, so that the positioning pin 435 can only slide in the groove 436, thereby limiting the movement of the inner tube 433.

[0057] Furthermore, to facilitate the rotation of the cover 22, the cover 22 includes a cover connecting part 221 and a cover main body part 222. The cover main body part 222 is connected to the rocker arm 44 through the cover connecting part 221. The cover connecting part 221 is preferably made of nylon fiber reinforced material. The cover main body part 222 matches the size of the recess 21 and may be made of glass, for example.

[0058] Specifically, the cover connecting portion 221 extends along the length of the first side of the housing 1, and its two ends are respectively connected to the two rocker arms 44 of the two transmission components. A cover mounting bracket is provided in the middle of the cover connecting portion 221, and the cover connecting portion 221 is rotatably connected to the bottom of the suction part 2 through the cover mounting bracket. For example, the cover mounting bracket can cooperate with a pin provided at the bottom of the suction part 2, so that the cover 22 can rotate relative to the housing 1.

[0059] When using the vacuum packaging machine described in this embodiment, the rotation of the rotating shaft 42 drives the rotation of the swing member 421, which in turn drives the rotation of the rocker arm 44 through the extension and retraction of the telescopic rod 43, thereby driving the rotation of the cover 22, and ultimately realizing the opening or closing of the cover 22.

[0060] Furthermore, to control the output of the drive device 41, a reduction gear 45 is provided between the drive device 41 and the rotating shaft 42. This reduction gear 45 can be, for example, a gearbox, which can adjust the torque output by the drive device 41. A coupling 46 can also be provided between the output shaft of the reduction gear 45 and the rotating shaft 42. By providing the coupling 46, power can be quickly transmitted from the reduction gear 45 to the rotating shaft 42 without power loss.

[0061] Furthermore, since the opening and closing degree of the cover 22 is related to the rotation degree of the rotating shaft 42, in order to detect the rotation degree of the rotating shaft 42, the opening and closing limit position of the cover 22 corresponds to the rotation limit position of the rotating shaft 42. Therefore, the transmission assembly also includes a detection device 47, which can detect the rotation degree of the rotating shaft 42, for example, the rotation degree of the swing member 421. The detection device 47 can be, for example, a photoelectric detector to detect whether the swing member 421 has rotated to its limit position. Of course, the transmission assembly may also include a limiting device, which can limit the rotation range of the rotating shaft 42, and especially limit the rotation range of the swing member 421.

[0062] Since the drive assembly 4 includes two transmission components connected to the drive device 41, and the reduction device 45 can be connected to the cover 22 through the two transmission components, the drive device 41 can open or close the cover 22 through the two transmission components. Specifically, in this embodiment, a reduction device 45 with two output shafts is used, wherein the two output shafts of the reduction device 45 extend in two opposite directions, and a transmission component is respectively provided on both sides of the reduction device 45 to be connected to the output shafts of the reduction device 45, wherein the two transmission components can be symmetrically arranged relative to the reduction device 45. In this way, the two output shafts of the reduction device 45 are respectively connected to the two transmission components, and the connection of the two transmission components to the cover 22 allows the torque output by the reduction device 45 to be transmitted through the two transmission components respectively.

[0063] Preferably, the rotating shafts 42 of the two transmission components are coaxially arranged. In this way, the torque is transmitted to the two transmission components through the driving device 41, and the movement of the two transmission components drives the movement of the cover 22, which can significantly improve the driving force on the cover 22.

[0064] Furthermore, the drive device 41 also has a self-locking function, for example, by using a self-locking motor. Since the drive device 41 has a self-locking function, the self-locking trigger condition of the drive device 41 can be associated with the state of the cover 22. For example, when the cover 22 is manually opened or closed, the telescopic rod 43 rotates accordingly, triggering the drive device 41 to activate the self-locking function, thereby preventing the shaft 42 from rotating and preventing damage to the drive device 41. In addition, the self-locking function can also disconnect the internal circuit of the vacuum packaging machine. For example, when the cover 22 is in the open state, the self-locking function of the drive device 41 can be triggered to cut off the power to the vacuum packaging machine, thus preventing the cover 22 from accidentally closing under the drive of the drive device 41.

[0065] On the other hand, since the drive device 41 is connected to the cover 22 through the transmission assembly, the opening or closing of the cover 22 can be manually controlled by the telescopic rod 43 when the self-locking function is accidentally triggered by the drive device 41. In particular, the movement range of the inner tube 433 can be limited by the cooperation of the positioning pin 435 and the slide groove 436.

[0066] When using the vacuum packaging machine of this embodiment, the control console 5 is operated to cause the drive device 41 to output power to drive the cover 22 to open through the transmission assembly. The bag of the package is placed in the recess 21, and the bag opening is placed on the sealing platform. The control console 5 is operated to cause the drive device 41 to output power to drive the cover 22 to close through the transmission assembly, so that the cover 22 cooperates with the sealing platform to press the bag opening. The control console 5 is operated to start the pump 3, and a vacuum operation is performed in the recess 21 through the suction port 23, thereby achieving the sealing of the package.

[0067] This utility model embodiment can open or close the lid of the vacuum packaging machine with a small torque. During normal use, there is no need for manual lifting to open the lid. The structure is simple and easy to operate. At the same time, it can prevent the lid from closing accidentally and injuring the operator. In the event of an accidental power failure during lid closing, the lid can be manually opened through the telescopic rod structure to remove the packaged items. It has high safety and convenient operation.

[0068] In the above embodiments of this utility model, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0070] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment generally described in this application. The appearance of the same term in multiple places in the specification does not necessarily refer to the same embodiment.

[0071] Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is claimed that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An internal vacuum packaging machine, characterized in that, The device includes a housing with a cavity. A suction part is suspended in the cavity. The suction part has a recess. A cover is provided on the recess. A drive assembly is provided in the cavity. The drive assembly is connected to the cover and suspended at the bottom of the suction part. The drive assembly is used to drive the cover to rotate around a first side of the housing. The drive assembly includes a drive device and two transmission assemblies connected to each other. The drive device is disposed between the two transmission assemblies, and the two transmission assemblies are respectively connected to both sides of the cover. The transmission assembly includes a rotating shaft, a telescopic rod, and a rocker arm. The drive device is connected to the rotating shaft. The end of the rotating shaft is provided with a swing member that rotates around the axis of the rotating shaft. The swing member is rotatably connected to the first end of the telescopic rod, and the second end of the telescopic rod is rotatably connected to the first end of the rocker arm.

2. The internal vacuum packaging machine according to claim 1, characterized in that, The drive device is connected to one end of the rotating shaft located on one side thereon, and the other end of the rotating shaft is connected to the first end of the telescopic rod.

3. The internal vacuum packaging machine according to claim 1, characterized in that, The two rotating shafts located on both sides of the drive device are coaxially arranged, or the two rotating shafts located on both sides of the drive device are integrally formed into a main rotating shaft, and the drive device is mounted on the main rotating shaft.

4. The internal vacuum packaging machine according to claim 3, characterized in that, The rocker arm has an arc-shaped structure, and the arc shape matches the rotation trajectory of the cover.

5. The internal vacuum packaging machine according to claim 3, characterized in that, The telescopic rod includes an outer tube with a connecting hole at its end. An inner tube is movably disposed inside the outer tube, and a connecting groove is provided at its end. The end of the swing member is pivotally connected to the connecting hole via a fastener. The first end of the rocker arm is inserted into the connecting groove and pivotally connected to the groove wall via a fastener.

6. The internal vacuum packaging machine according to claim 3, characterized in that, The cover includes a cover connecting part and a cover main body part, and the cover main body part is connected to the rocker arm through the cover connecting part.

7. The internal vacuum packaging machine according to claim 6, characterized in that, The cover connecting part extends along the length of the first side of the shell, and its two ends are respectively connected to the two rocker arms. A cover mounting bracket is provided in the middle of the cover connecting part and is rotatably connected to the bottom of the suction part through the cover mounting bracket.

8. The internal vacuum packaging machine according to claim 3, characterized in that, A speed reduction device is provided between the drive device and the rotating shaft, and a coupling is provided between the output shaft of the speed reduction device and the rotating shaft.

9. The internal vacuum packaging machine according to claim 3, characterized in that, The transmission assembly also includes a detection device for detecting the degree of rotation of the shaft.

10. The internal vacuum packaging machine according to claim 3, characterized in that, The transmission assembly also includes a limiting device for limiting the rotation range of the shaft.

11. The internal vacuum packaging machine according to claim 1, characterized in that, The drive device has a self-locking function.

12. The internal vacuum packaging machine according to claim 1, characterized in that, A pump body is also provided inside the cavity, and a suction port is provided at the bottom of the recess, which is connected to the pump body.

13. The internal vacuum packaging machine according to claim 9, characterized in that, The housing has a bottom plate, and multiple side walls are arranged around the bottom plate. The side walls are connected in sequence and cooperate with the bottom plate to form the cavity.

14. The internal vacuum packaging machine according to claim 13, characterized in that, A sealing platform is provided on the side wall located on the second side of the housing, and the sealing platform is partially opposite to the cover body. A control console is provided on the outer side of the second side of the housing.

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