Handheld sealing machine

Abstract

A handheld sealing machine comprises a base and an upper cover, one side of the upper cover is hinged to the base, a sealing device is arranged between the other side of the upper cover and the base, the sealing device comprises an electric heating wire assembly arranged in the base, a battery assembly is further arranged in the base and comprises at least two batteries arranged side by side, and an on-off structure is arranged on one side of the battery assembly. One side of the on-off structure is a power supply side, the other side of the on-off structure is a power supply output side and is electrically connected with the heating wire assembly, one side, close to the on-off structure, of each of at least two batteries is connected with a switching conducting strip, and the on-off structure comprises a touch frame rotationally arranged in the base and made of a conducting material and an elastic reset device connected with the touch frame. And the touch frame is connected with the upper cover through a clutch structure. The handheld sealing machine is not prone to misoperation.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing machines, in particular to a handheld sealing machine. Background Art

[0002] After the product is loaded into the packaging container, in order to keep the product sealed and preserved, the packaging container usually needs to be sealed. This operation is completed on a sealing machine, and handheld sealing machines are widely used due to their small size, light weight, and easy to carry.

[0003] The Chinese utility model patent with the authorization announcement number CN 215399683 U discloses a hand-held sealing machine, the structure of which is as follows: Figure 1 As shown, it includes a shell, a control device, a cutting device and a sealing device. The shell is a cavity structure, and the control device, the cutting device and the sealing device are all arranged in the shell; the shell includes a top cover 1a, a main bracket 2a and a bottom shell 3a; the cutting device includes a first bracket 4a and a blade 5a; the sealing device includes a second bracket 6a, a pressure head 7a, a pressure seat 8a and a metal sheet 9a, and a heating wire is arranged on the pressure seat 8a; the control device includes a control button, a control board 10a and a battery 11a, and the control button is embedded in the top cover 1a and includes a power button 12a, a cutting button 13a and a sealing button 14a. The handheld sealing machine can power on the device by pressing the power button 12a, and then press the sealing button 14a or the cutting button 13a after powering on, so as to start the sealing device to realize the heat sealing function or start the cutting device to realize the bag cutting function.

[0004] However, the existing hand-held sealing machine has the following technical problems: when the device is powered on by pressing the power button 12a, it is very easy to cause misoperation due to accidental touch. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a hand-held sealing machine which is not prone to misoperation.

[0006] The technical solution of the utility model is: a hand-held sealing machine, comprising a base and an upper cover, one side of the upper cover is hinged on the base, and a sealing device is arranged between the other side and the base, the sealing device comprises a heating wire assembly arranged in the base, and a battery assembly is also arranged in the base, the battery assembly comprises at least two batteries arranged side by side, one side of the battery assembly is provided with a switching structure, and the other side is a power output side and is electrically connected to the heating wire assembly, at least two of the batteries are respectively connected with a switching conductive sheet on a side close to the switching structure, the switching structure comprises a trigger frame made of a conductive material rotatably arranged in the base, and an elastic reset device connected to the trigger frame, the trigger frame is connected to the upper cover through a clutch structure, and is used to separate the trigger frame from the upper cover when the upper cover is flipped upward, and the elastic reset device applies a force to the trigger frame away from the switching conductive sheet to cut off the power of the battery assembly, and when the upper cover is flipped downward, the trigger frame is combined with the upper cover, and the upper cover drives the trigger frame to rotate until it is connected to the switching conductive sheet to energize the battery assembly.

[0007] The working principle of the utility model hand-held sealing machine is as follows:

[0008] When it is necessary to seal the packaging container, the upper cover is flipped upwards, the trigger frame is separated from the upper cover, and the elastic reset device exerts a force on the trigger frame away from the adapter conductive sheet to cut off the power to the battery assembly, and the heating wire assembly does not work. At this time, the bag opening of the packaging container can be safely placed between the upper cover and the base; the upper cover is flipped downwards, the trigger frame is combined with the upper cover, and rotated under the drive of the upper cover to be connected to the adapter conductive sheet to energize the battery assembly. At the same time, the bag opening of the packaging container is clamped between the upper cover and the base, and the heating wire assembly works after the battery assembly is energized, so that the bag opening of the packaging container can be heat-sealed.

[0009] After adopting the above structure, the utility model has the following advantages:

[0010] The hand-held sealing machine of the utility model adopts a mechanical on-off structure to replace a button to control the on-off of the battery assembly; and the on-off of the on-off structure is associated with the flipping action of the upper cover, and the flipping action of the upper cover actually corresponds to the actual operation action, because flipping the upper cover upward generally means placing the packaging container on the machine, at this time the battery assembly is disconnected by the on-off structure, and the heating wire assembly does not work, so that it is not easy to get burned during the placing process, and it is safer to use; flipping the upper cover downward generally means heating and sealing the bag opening of the packaging container, at this time the battery assembly is connected by the on-off structure, the heating wire can be started, and heat sealing can be automatically achieved, which is very convenient to use; precisely because the flipping action of the upper cover is associated with the actual operation action, compared with simply pressing a button, the current use state can be more reliably detected, and misoperation is not easy to occur.

[0011] Preferably, a protective cover is provided between the upper cover and the base, and the protective cover is slidably provided on the base and movably covers the heating wire assembly. When the machine is not in use, the protective cover is covered on the heating wire assembly to prevent the heating wire assembly from being crushed by external forces and to prevent burns caused by possible misoperation. When the machine is in use, the protective cover can be easily removed.

[0012] Preferably, an elastic pressure plate is provided between the upper cover and the base, one end of the elastic pressure plate is connected to the upper cover, and the other end can be pressed against the base when the upper cover is flipped down. This arrangement can use the elastic pressure plate to form a buffer force when flipping and pressing the upper cover, making flipping and pressing more comfortable and not easy to cause damage to the base and the upper cover.

[0013] Preferably, the two sides of the upper cover are hinged to the outside of the two sides of the base through the first rotating shaft, and the two sides of the trigger frame are hinged to the inside of the two sides of the base through the second rotating shaft, and the first rotating shaft and the second rotating shaft are arranged close to each other and parallel to each other. This arrangement is reasonable, and the rotating shafts of the upper cover and the trigger frame are arranged close to each other, which facilitates the combination of the upper cover and the trigger frame.

[0014] Preferably, the clutch structure includes a pressure rod arranged on the upper cover and an arc-shaped guide groove arranged on the base. When the upper cover is flipped downward, the pressure rod is driven to slide forward in the guide groove, and when it is flipped upward, the pressure rod is driven to slide reversely in the guide groove. When the pressure rod slides forward to the first position of the guide groove, it just presses on one side of the trigger frame and continues to slide to maintain the pressing state so that the other side of the trigger frame rotates to connect with the transfer conductive sheet. When the pressure rod slides reversely to the second position of the guide groove, the trigger frame is released and continues to slide to maintain the released state. The clutch structure is very simple and can reliably realize the combination and separation of the upper cover and the trigger frame.

[0015] Preferably, two of the pressure rods and guide grooves are provided, the two guide grooves are provided on both sides of the base, and the two pressure rods are provided in both sides of the upper cover. This arrangement can make the force on the trigger frame more uniform and the rotation more stable, so that the trigger frame can be more reliably connected to the transfer conductive sheet.

[0016] Preferably, the trigger frame is arranged below the transfer conductive sheet, the transfer conductive sheet has abutting portion against the top of the trigger frame, and the elastic reset device is a tension spring. This arrangement is reasonable, and the connection between the trigger frame and the transfer conductive sheet is tighter and more reliable.

[0017] Preferably, the second rotating shaft is arranged above the first rotating shaft, and the guide groove is arranged above the second rotating shaft. This arrangement is reasonable and more convenient for realizing the combination and separation of the pressure rod and the trigger frame.

[0018] Preferably, the trigger frame is U-shaped, and when the two pressure rods slide forward to the first position of the guide groove, they just press against the two ends of the opening side of the trigger frame and continue to slide to drive the other side of the trigger frame to rotate to connect with the transfer conductive sheet. This arrangement makes the trigger frame light in structure and can be well combined with the pressure rod and the transfer conductive sheet.

[0019] Preferably, the base further includes a limit plate disposed in the base and located above the transfer conductive sheet, the bottom of the limit plate abutting against the abutting portion of the transfer conductive sheet. This arrangement can limit the transfer conductive sheet from moving upward by using the limit plate, so that when the trigger frame rotates to connect with the transfer conductive sheet, the transfer conductive sheet can be clamped between the trigger frame and the limit plate, thereby making the connection between the trigger frame and the transfer conductive sheet tighter and more reliable.

[0020] As a preferred embodiment, the machine further comprises a blade slot disposed on one side of the upper cover, and a blade assembly that can be withdrawn and installed in the blade slot. This arrangement enables the machine to have a cutting function and more diverse functions, and the blade assembly is arranged in a withdrawable manner, which is also very convenient to use and store.

[0021] Preferably, the blade assembly includes a blade seat and a blade mounted on the blade seat, one of the blade slot and the blade seat is provided with a slide groove and the other is provided with a slider, the blade seat is retractably mounted in the blade slot through the slider and the slide groove, the outer side of the slide groove is closed to limit the extreme position of the blade seat being pulled out. The retractable structure of the slider plus the slide groove is simple and reliable, and the outer side of the slide groove is closed to prevent the blade assembly from falling out of the blade slot.

[0022] Preferably, one of the blade seat and the blade slot is provided with a positioning protrusion, and the other is provided with two positioning grooves, for positioning the blade seat in the pull-out position and the storage position. This arrangement can position the pull-out position and the storage position of the blade assembly, so that the blade assembly is not easy to shake when in use and storage, and is safer and more reliable to use.

[0023] Preferably, the heating wire assembly includes a support seat and a heating wire, the support seat is fixed in the base and the top protrudes outside the base, the heating wire is U-shaped and installed on the support seat with the opening facing downward, conductive posts are arranged at both ends of the heating wire, the conductive posts are embedded in the support seat and one end is exposed outside the support seat, and the output side of the battery assembly is also provided with a positive conductive sheet and a negative conductive sheet that abut against the exposed ends of the two conductive posts. This arrangement is convenient for the installation of the heating wire and the electrical connection between the heating wire and the battery assembly, and the contact area can be increased by connecting with the guide post, and the electrical connection is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an existing handheld sealing machine;

[0025] Figure 2 This is a schematic diagram of the structure of the handheld sealing machine of the utility model after the upper cover is flipped upwards;

[0026] Figure 3 This is another structural schematic diagram of the handheld sealing machine of the utility model after the upper cover is flipped upwards;

[0027] Figure 4 This is a top view of the handheld sealing machine of the utility model after the upper cover is flipped upwards;

[0028] Figure 5 for Figure 4 A cross-sectional view along the middle line AA′;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0030] Figure 7 This is an exploded schematic diagram of the handheld sealing machine of the utility model;

[0031] Figure 8 This is a schematic diagram of the internal structure of the handheld sealing machine of the utility model;

[0032] Fig. 9 It mainly shows the schematic diagram of the cooperation between the blade assembly of the utility model and the top of the blade slot;

[0033] Fig.10 It mainly shows the structural schematic diagram of the bottom of the blade slot of the utility model;

[0034] Fig.11 The figure is mainly a schematic diagram showing the coordination between the heating wire assembly of the utility model and the positive electrode conductive sheet and the negative electrode conductive sheet;

[0035] Fig.12 This is a schematic diagram of the structure of the handheld sealing machine of the utility model after the upper cover is flipped downward;

[0036] Fig.13 This is a top view of the handheld sealing machine of the utility model after the upper cover is flipped downward;

[0037] Fig.14 for Fig.13 Cross-sectional view along CC′;

[0038] Fig.15 for Fig.14 A partial enlarged schematic diagram of point D in the middle;

[0039] Fig.16 It mainly shows the schematic diagram of the position of the pressure rod in the guide groove after the upper cover of the hand-held sealing machine of the utility model is flipped down;

[0040] In the prior art figure: 1a-top cover, 2a-main bracket, 3a-bottom shell, 4a-first bracket, 5a-blade, 6a-second bracket, 7a-pressing head, 8a-pressing seat, 9a-metal sheet, 10a-control board, 11a-battery, 12a-power button, 13a-cutting button, 14a-sealing button;

[0041] In the utility model: 1-base, 2-upper cover, 3-heating wire assembly, 4-battery assembly, 5-battery, 6-transfer conductive sheet, 7-touch frame, 8-elastic reset device, 9-protective cover, 10-elastic pressure plate, 11-first rotating shaft, 12-second rotating shaft, 13-pressure rod, 14-guide groove, 15-abutment portion, 16-limiting plate, 17-blade groove, 18-blade seat, 19-blade, 20-slide groove, 21-slider, 22-positioning convex point, 23-positioning groove, 24-arc line, 25-support seat, 26-heating wire, 27-conductive column, 28-positive conductive sheet, 29-negative conductive sheet, 30-high temperature tape, 31-pressing head, 32-blade assembly. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] Example:

[0044] like Figure 2-16 As shown, a handheld sealing machine comprises a base 1 and an upper cover 2, one side of the upper cover 2 is hinged to the base 1, and a sealing device is provided between the other side and the base 1, such as Figure 8 As shown, the sealing device includes a heating wire assembly 3 arranged in a base 1, and a battery assembly 4 is also arranged in the base 1. The battery assembly 4 includes at least two batteries 5 arranged side by side. A switching structure is arranged on one side of the battery assembly 4, and the other side is a power output side and is electrically connected to the heating wire assembly 3. At least two batteries 5 are respectively connected to a switching conductive sheet 6 on one side close to the switching structure. Figure 6 , Figure 7 , Fig.15As shown, the on-off structure includes a trigger frame 7 made of conductive material rotatably arranged in the base 1, and an elastic reset device 8 connected to the trigger frame 7. The trigger frame 7 is connected to the upper cover 2 through a clutch structure, and is used to separate the trigger frame 7 from the upper cover 2 when the upper cover 2 is flipped upward, and the elastic reset device 8 applies a force to the trigger frame 7 away from the transfer conductive sheet 6 to cut off the power of the battery assembly 4, and when the upper cover 2 is flipped downward, the trigger frame 7 is combined with the upper cover 2, and the upper cover 2 drives the trigger frame 7 to rotate to connect with the transfer conductive sheet 6 to energize the battery assembly 4; in this embodiment, the battery assembly 4 and the sealing device are arranged side by side on the left and right, and the battery assembly 4 is closer to the hinge between the upper cover 2 and the base 1, and the battery assembly 4 includes two batteries 5 arranged side by side front and back, and correspondingly, two transfer conductive sheets 6 are also arranged and correspond to the positions of the two batteries 5.

[0045] A protective cover 9 is also provided between the upper cover 2 and the base 1. The protective cover 9 is slidably mounted on the base 1 and can be movably covered on the heating wire assembly 3. The sliding connection structure between the protective cover 9 and the base 1 can adopt the existing technology; an elastic pressure plate 10 is also provided between the upper cover 2 and the base 1. One end of the elastic pressure plate 10 is connected to the upper cover 2, and the other end can be pressed against the base 1 when the upper cover 2 is flipped downward; in this embodiment, the elastic pressure plate 10 is arc-shaped, one end of the elastic pressure plate 10 is snap-connected to the upper cover 2, and the elastic pressure plate 10 is arranged on one side of the protective cover 9 close to the hinge between the upper cover 2 and the base 1.

[0046] like Figure 7 As shown, the two sides of the upper cover 2 are hinged to the outside of the two sides of the base 1 through the first rotating shaft 11, and the two sides of the trigger frame 7 are hinged to the inside of the two sides of the base 1 through the second rotating shaft 12. The first rotating shaft 11 and the second rotating shaft 12 are arranged close to each other and parallel to each other.

[0047] like Figure 3 , Figure 7 , Figure 8 , Fig.16 As shown, the clutch structure includes a pressure rod 13 arranged on the upper cover 2, and an arc-shaped guide groove 14 arranged on the base 1. When the upper cover 2 is flipped downward, the pressure rod 13 is driven to slide forward in the guide groove 14, and when it is flipped upward, the pressure rod 13 is driven to slide reversely in the guide groove 14. When the pressure rod 13 slides forward to the first position of the guide groove 14, it just presses on one side of the trigger frame 7 and continues to slide to maintain the pressing state so that the other side of the trigger frame 7 is rotated to be connected with the transfer conductive sheet 6. When the pressure rod 13 slides reversely to the second position of the guide groove 14, the trigger frame 7 is released and continues to slide to maintain the released state; two pressure rods 13 and two guide grooves 14 are each provided, and the two guide grooves 14 are respectively provided on both sides of the base 1, and the two pressure rods 13 are respectively provided in both sides of the upper cover 2.

[0048] like Figure 6 , Figure 7 , Fig.15 As shown, the trigger frame 7 is arranged below the transfer conductive sheet 6, the transfer conductive sheet 6 has abutting portion 15 abutting against the top of the trigger frame 7, and the elastic reset device 8 is a tension spring; the second rotating shaft 12 is arranged above the first rotating shaft 11, and the guide groove 14 is arranged above the second rotating shaft 12; the trigger frame 7 is U-shaped, and the two pressure rods 13 just press against the two end portions of the opening side of the trigger frame 7 when sliding forward to the first position of the guide groove 14 and continue to slide to drive the other side of the trigger frame 7 to rotate to connect with the transfer conductive sheet 6; it also includes a limit plate 16 arranged in the base 1 and located above the transfer conductive sheet 6, and the bottom of the limit plate 16 abuts against the abutting portion 15 of the transfer conductive sheet 6; in this embodiment, the limit plate 16 is also snap-connected with the base 1.

[0049] like Figure 5 , Fig. 9 , Fig.10 , Fig.14 As shown, it also includes a blade slot 17 arranged on one side of the upper cover 2, and a blade assembly 32 that can be pulled out and installed in the blade slot 17; the blade assembly 32 includes a blade seat 18 and a blade 19 installed on the blade seat 18, the blade slot 17 and the blade seat 18, one of which is provided with a slide groove 20 and the other is provided with a slider 21, the blade seat 18 is pulled out and installed in the blade slot 17 through the slider 21 and the slide groove 20, and the outer side of the slide groove 20 is closed to limit the extreme position of the blade seat 18 to be pulled out; the blade seat 18 and the blade slot 17, one of which is provided with a positioning protrusion 2 2, and two positioning grooves 23 are provided on the other hand, for positioning the blade seat 18 in the pull-out position and the storage position; in this embodiment, the slide groove 20 is provided at the top of the blade groove 17, the slider 21 is provided at the top of the blade seat 18, two sliders 21 and the slide groove 20 are provided, the positioning protrusion 22 is provided at the bottom of the blade groove 17, and two positioning grooves 23 are provided at the bottom of the blade seat 18, and an arc line 24 is cut on the upper cover 2 and around the positioning protrusion 22, so that the area where the positioning protrusion 22 is located has a certain elasticity, which facilitates the combination and separation of the positioning protrusion 22 and the positioning groove 23.

[0050] like Figure 5 , Fig.11 , Fig.14As shown, the heating wire assembly 3 includes a support seat 25 and a heating wire 26. The support seat 25 is fixed in the base 1 and the top protrudes outside the base 1. The heating wire 26 is U-shaped and installed on the support seat 25 with the opening facing downward. Conductive posts 27 are arranged at both ends of the heating wire 26. The conductive posts 27 are embedded in the support seat 25 and one end is exposed outside the support seat 25. The output side of the battery assembly 4 is also provided with a positive conductive sheet 28 and a negative conductive sheet 29 that are respectively against the exposed ends of the two conductive posts 27; in this embodiment, the bottom end of the conductive post 27 is exposed outside the support seat 25, and the positive conductive sheet 28 and the negative conductive sheet 29 are respectively exposed outside the support seat 25. 8 and one side of the negative electrode conductive sheet 29 are electrically connected to the output sides of the two batteries 5 respectively, and the other side is against the bottom end of the conductive column 27. The top of the heating wire 26 is also covered with a high-temperature tape 30. The sealing device also includes a pressure head 31 arranged directly above the heating wire assembly 3. The outer side of the pressure head 31 is usually also covered with a thermal insulation pad. The thermal insulation pad can be made of existing technology. The thermal insulation pad is not shown in the drawings of this embodiment. The high-temperature tape 30 can prevent the heating wire 26 from being directly exposed, causing excessive temperature and burning the user, and the thermal insulation pad can prevent the temperature of the heating wire 26 from being transferred to the upper cover 2 and causing burns.

[0051] The working principle of the utility model hand-held sealing machine is as follows:

[0052] When the packaging container needs to be sealed, the upper cover 2 is flipped upward, and the pressure rod 13 slides in the guide groove 14 in the opposite direction. When the pressure rod 13 slides in the opposite direction to the second position of the guide groove 14, the trigger frame 7 is released and continues to slide to maintain the released state. Figure 2-8 As shown, during this process, the trigger frame 7 is separated from the upper cover 2, and the elastic reset device 8 exerts a force on the trigger frame 7 to move away from the transfer conductive sheet 6, so that the battery assembly 4 is powered off, and the heating wire assembly 3 does not work. At this time, the protective cover 9 can be removed and the bag mouth of the packaging container can be safely placed between the pressure head 31 of the upper cover 2 and the heating wire assembly 3 of the base 1; the upper cover 2 is turned down, and the pressure rod 13 slides forward in the guide groove 14. When the pressure rod 13 slides forward to the first position of the guide groove 14, it just presses on one side of the trigger frame 7 and continues to slide to maintain the pressing state, as shown in FIG. Figure 12-16 As shown, during this process, the pressure rod 13 presses one side of the trigger frame 7 downward to make the other side of the trigger frame 7 rotate upward and connect to the transfer conductive sheet 6, and at the same time, the bag opening of the packaging container is clamped between the upper cover 2 and the base 1. After the trigger frame 7 is combined with the transfer conductive sheet 6, the battery assembly 4 is energized, and after the battery assembly 4 is energized, the heating wire assembly 3 works, so that the bag opening of the packaging container can be heat-sealed; after use, the upper cover 2 is flipped upward and the protective cover 9 is moved to cover the heating wire assembly 3; when it is necessary to cut the bag opening of the packaging container, the blade assembly 32 is pulled out of the blade slot 17, as shown in FIG. Fig. 9 , Fig.10As shown, the slider 21 of the blade seat 18 slides outward along the slide groove 20 of the blade groove 17. Since the outer side of the slide groove 20 is closed, the slider 21 will stop when it slides to the closed position of the slide groove 20. At this time, the positioning protrusion 22 is also just stuck in the outer positioning groove 23. The blade assembly 32 is limited in the pulled-out position and will not shake, so that the blade 19 can be used to cut the bag opening. After cutting, the blade assembly 32 is pushed in, and the slider 21 of the blade seat 18 slides inward along the slide groove 20 of the blade groove 17. When the positioning protrusion 22 is stuck in the inner positioning groove 23, the blade assembly 32 is limited in the storage position and will not shake.

Claims

1. A hand-held sealing machine, comprising a base (1) and an upper cover (2), wherein one side of the upper cover (2) is hinged to the base (1), and a sealing device is arranged between the other side and the base (1), wherein the sealing device comprises a heating wire assembly (3) arranged in the base (1), and a battery assembly (4) is also arranged in the base (1), wherein the battery assembly (4) comprises at least two batteries (5) arranged side by side, and wherein: A switching structure is arranged on one side of the battery assembly (4), and the other side is a power output side and is electrically connected to the heating wire assembly (3). At least two of the batteries (5) are respectively connected to a switching conductive sheet (6) on one side close to the switching structure. The switching structure comprises a trigger frame (7) made of a conductive material and rotatably arranged in the base (1), and an elastic reset device (8) connected to the trigger frame (7). The trigger frame (7) is connected to the upper cover (2) through a clutch structure, and is used to separate the trigger frame (7) from the upper cover (2) when the upper cover (2) is flipped upward, and the elastic reset device (8) applies a force to the trigger frame (7) away from the switching conductive sheet (6) to disconnect the battery assembly (4), and when the upper cover (2) is flipped downward, the trigger frame (7) is combined with the upper cover (2), and the upper cover (2) drives the trigger frame (7) to rotate until it is connected to the switching conductive sheet (6), so that the battery assembly (4) is energized.

2. A handheld sealing machine according to claim 1, characterized in that: A protective cover (9) is also provided between the upper cover (2) and the base (1); the protective cover (9) is slidably mounted on the base (1) and can be movably covered on the heating wire assembly (3).

3. A handheld sealing machine according to claim 1, characterized in that: An elastic pressure plate (10) is also provided between the upper cover (2) and the base (1); one end of the elastic pressure plate (10) is connected to the upper cover (2), and the other end can be pressed against the base (1) when the upper cover (2) is turned downward.

4. A handheld sealing machine according to claim 1, characterized in that: The two sides of the upper cover (2) are hinged to the outside of the two sides of the base (1) through a first rotating shaft (11), and the two sides of the trigger frame (7) are hinged to the inside of the two sides of the base (1) through a second rotating shaft (12), and the first rotating shaft (11) and the second rotating shaft (12) are arranged close to each other and parallel to each other.

5. A handheld sealing machine according to claim 4, characterized in that: The clutch structure comprises a pressure rod (13) arranged on the upper cover (2) and an arc-shaped guide groove (14) arranged on the base (1); when the upper cover (2) is flipped downward, the pressure rod (13) is driven to slide forward in the guide groove (14); and when the upper cover (2) is flipped upward, the pressure rod (13) is driven to slide reversely in the guide groove (14); when the pressure rod (13) slides forward to a first position of the guide groove (14), it just presses against one side of the trigger frame (7) and continues to slide to maintain the pressing state, so that the other side of the trigger frame (7) is rotated to be connected with the transfer conductive sheet (6); when the pressure rod (13) slides reversely to a second position of the guide groove (14), the trigger frame (7) is released and continues to slide to maintain the released state.

6. A handheld sealing machine according to claim 5, characterized in that: Two of the pressure rods (13) and guide grooves (14) are provided, and the two guide grooves (14) are provided on both sides of the base (1) respectively, and the two pressure rods (13) are provided in both sides of the upper cover (2) respectively.

7. A handheld sealing machine according to claim 6, characterized in that: The trigger frame (7) is arranged below the switching conductive sheet (6), the switching conductive sheet (6) has a supporting portion (15) that abuts against the top of the trigger frame (7), and the elastic reset device (8) is a tension spring.

8. A handheld sealing machine according to claim 7, characterized in that: The second rotating shaft (12) is arranged above the first rotating shaft (11), and the guide groove (14) is arranged above the second rotating shaft (12).

9. The handheld sealing machine according to claim 6, characterized in that: The trigger frame (7) is U-shaped, and when the two pressure rods (13) slide forward to the first position of the guide groove (14), they just press against the two ends of the opening side of the trigger frame (7) and continue to slide to drive the other side of the trigger frame (7) to rotate and connect with the transfer conductive sheet (6).

10. The handheld sealing machine according to claim 7, characterized in that: It also comprises a limiting plate (16) arranged in the base (1) and located above the switching conductive sheet (6), wherein the bottom of the limiting plate (16) abuts against the abutting portion (15) of the switching conductive sheet (6).

11. The handheld sealing machine according to claim 1, characterized in that: It also comprises a blade slot (17) arranged on one side of the upper cover (2), and a blade assembly (32) which is withdrawably installed in the blade slot (17).

12. A handheld sealing machine according to claim 11, characterized in that: The blade assembly (32) comprises a blade seat (18) and a blade (19) mounted on the blade seat (18); one of the blade slot (17) and the blade seat (18) is provided with a slide groove (20) and the other is provided with a slider (21); the blade seat (18) is movably mounted in the blade slot (17) via the slider (21) and the slide groove (20); the outer side of the slide groove (20) is closed to limit the extreme position of the blade seat (18) being pulled outward.

13. A handheld sealing machine according to claim 12, characterized in that: One of the blade seat (18) and the blade slot (17) is provided with a positioning protrusion (22), and the other is provided with two positioning grooves (23), which are used to position the blade seat (18) at a pull-out position and a storage position.

14. The handheld sealing machine according to claim 1, characterized in that: The heating wire assembly (3) comprises a support seat (25) and a heating wire (26); the support seat (25) is fixedly arranged in the base (1) and the top thereof protrudes outside the base (1); the heating wire (26) is U-shaped and is installed on the support seat (25) with its opening facing downward; conductive posts (27) are arranged at both ends of the heating wire (26); the conductive posts (27) are embedded in the support seat (25) and one end thereof is exposed outside the support seat (25); and the output side of the battery assembly (4) is also provided with a positive conductive sheet (28) and a negative conductive sheet (29) respectively abutting against the exposed ends of the two conductive posts (27).

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