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 on the base, and a battery assembly is further arranged in the base and comprises at least two batteries arranged side by side. One side of the battery assembly is provided with two first battery elastic sheets and a first on-off structure used for connecting and disconnecting the two first battery elastic sheets, and the other side of the battery assembly is provided with two second battery elastic sheets and a second on-off structure used for connecting and disconnecting the two second battery elastic sheets. The first on-off structure comprises a touch frame which is rotationally arranged in the base and made of conductive materials, the touch frame is connected with the upper cover, the second on-off structure comprises a key arranged at the bottom of the base, the key is arranged below the electric heating wire assembly, and the second battery elastic piece is arranged between the electric heating wire assembly and the key. The handheld sealing machine is not easy to touch by mistake to cause misoperation, and is safer to use.

Description

Technical Field

[0001] This utility model relates to the field of sealing machine technology, specifically to a handheld sealing machine. Background Art

[0002] After the product is placed into the packaging container, it is usually necessary to seal the packaging container in order to preserve the product. This operation is generally done on a sealing machine, and handheld sealing machines are widely used because of their advantages such as small size, light weight and easy portability.

[0003] Chinese utility model patent CN215399683U discloses a handheld sealing machine, the structure of which is as follows: Figure 1 As shown, the device includes a housing, a control device, a cutting device, and a sealing device. The housing has a hollow structure, and the control device, cutting device, and sealing device are all housed within the housing. The housing includes a top cover 1a, a main support 2a, and a bottom shell 3a. The cutting device includes a first support 4a and a blade 5a. The sealing device includes a second support 6a, a pressure head 7a, a pressure base 8a, and a metal sheet 9a. A heating wire is installed on the pressure base 8a. The control device includes control buttons, a control board 10a, and a battery 11a. The control buttons are embedded in the top cover 1a and include a power button 12a, a cutting button 13a, and a sealing button 14a. This handheld sealing machine is powered on by pressing the power button 12a. After power is on, pressing the sealing button 14a or the cutting button 13a activates the sealing device to perform a heat sealing function or activates the cutting device to perform a bag-cutting function.

[0004] However, existing handheld sealing machines have the following technical problems: the machine is started by pressing the power button 12a on the top cover 1a. Since the power button 12a is located on the top cover 1a, it is very obvious and is very easy to be accidentally touched, which may lead to misoperation. Furthermore, after the power button 12a is pressed, it is transmitted to the control board 10a through an electronic switch signal. The control board 10a controls the battery 11a to supply power to the heating wire. This is an electronic switch signal triggering method that is not related to the actual operation, thus further increasing the risk of accidental touch and making it very unsafe to use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a handheld sealing machine that is less prone to accidental touch and operation and is safer to use.

[0006] The technical solution of this utility model is: a handheld sealing machine, including a base and a top cover. One side of the top cover is hinged to the base, and a sealing device is provided between the top cover and the base on the other side. The sealing device includes a heating wire assembly disposed on the base. A battery assembly is also disposed inside the base. The battery assembly includes at least two batteries arranged side by side. Two first battery springs and a first on / off structure for switching the two first battery springs are provided on one side of the battery assembly. Two second battery springs and a second on / off structure for switching the two second battery springs are provided on the other side of the battery assembly. The structure includes a first on / off structure comprising a touch frame made of conductive material rotatably disposed within a base. The touch frame is connected to a top cover and is used to separate the touch frame from the first battery spring when the top cover is flipped upwards, and to connect the touch frame to the first battery spring when the top cover is flipped downwards. The second on / off structure includes a button disposed at the bottom of the base. The button is disposed below the heating wire assembly, and the second battery spring is disposed between the heating wire assembly and the button. When the button is pressed, the second battery spring is connected to the heating wire assembly, and when the button is released, the second battery spring is separated from the heating wire assembly.

[0007] The working principle of this handheld sealing machine is as follows:

[0008] When sealing the packaging container, flip the top cover upwards. The trigger frame separates from the first battery spring, disconnecting the battery inside the battery assembly. The battery assembly cannot supply power to the heating wire assembly, and the heating wire assembly does not work. At this time, the opening of the packaging container can be safely placed on the sealing device between the top cover and the base. Then, flip the top cover downwards. The opening of the packaging container is clamped between the top cover and the base, and the trigger frame connects to the first battery spring, making the battery inside the battery assembly conductive. Then, press the sealing device between the top cover and the base. During the pressing process, the button is also pressed, so that the second battery spring connects to the heating wire assembly and is energized. The battery assembly supplies power to the heating wire assembly through the second battery spring. The heating wire assembly starts working when both the first and second on / off structures are conductive, finally completing the heat sealing of the opening of the packaging container. After the machine is used up, release the button. The second battery spring separates from the heating wire assembly and is de-energized. The battery assembly cannot supply power to the heating wire assembly, and the heating wire assembly does not work.

[0009] With the above structure, this utility model has the following advantages:

[0010] This handheld sealing machine utilizes a first on / off structure to control the connection and disconnection of the internal battery of the battery assembly, and a second on / off structure to control the connection and disconnection between the battery assembly and the heating wire assembly. This dual-protection control significantly reduces the risk of accidental activation and ensures safer operation. Secondly, the button for the second on / off structure is located at the bottom of the base, making it difficult to spot and further reducing the risk of accidental activation, thus enhancing safety. Thirdly, the first on / off structure is linked to the flipping action of the top cover, which corresponds to the actual operation. When flipping the top cover upwards to open it, the packaging container is typically placed on the machine. In this case, the first on / off structure disconnects the battery assembly, preventing the heating wire assembly from working and reducing the risk of burns during placement. Conversely, when flipping the top cover downwards to close it, the packaging container's opening is typically heat-sealed. The first on / off structure is also suitable for connecting the internal battery of the battery assembly in this situation. Furthermore, the second on / off structure is also linked to the pressing action of the sealing device, which also corresponds to the actual operation. Pressing the sealing device typically involves inserting the bag opening... During heat sealing, the second on / off structure connects the battery assembly and the heating wire assembly, enabling the heating wire assembly to operate and achieve heat sealing. Releasing the sealing device typically completes the heat sealing operation; at this point, the second on / off structure disconnects the battery assembly from the heating wire assembly, ensuring safer operation. Because the flipping action of the top cover and the pressing action of the sealing device are both related to the actual operating actions, combining them with the first and second on / off structures respectively allows for accurate control of the internal battery connection and connection between the battery assembly and the heating wire assembly while reliably detecting the current operating status. The on / off switching of the heating wire assembly further reduces the risk of accidental activation, making it safer to use. Furthermore, both the first and second on / off structures are mechanical, offering higher reliability and better alignment with actual operation compared to electronic switch signals, thus further reducing the risk of accidental activation and enhancing safety. In addition, when storing the machine, even with the top cover closed and the first on / off structure still conducting, the second on / off structure disconnects the battery assembly from the heating wire assembly, keeping the machine in a non-working state. This not only saves energy but also minimizes space requirements when stored.

[0011] Preferably, one end of the button is provided with a pressing part and the other end is provided with two push rods that can abut against the second battery spring. The pressing part is embedded outside the base and the push rods are located inside the base. This arrangement facilitates external operation of the pressing part to realize the pressing action of the push rods on the button.

[0012] Preferably, a button bracket is provided at the end of the button away from the pressing part, and the two push rods are mounted on the button bracket. A first elastic reset member is also included, positioned between the two push rods. One end of the first elastic reset member abuts against the button bracket, and the other end abuts against the battery assembly. Adding a button bracket facilitates the mounting of the push rods and the first elastic reset member. Positioning the first elastic reset member between the two push rods improves the tactile feel when the button is pressed and enhances the synchronization of the two push rods, thereby ensuring reliable connection and disconnection of the second on / off structure.

[0013] Preferably, the base also includes a limiting post hole for installing the first elastic reset member. The limiting post hole extends through the bottom of the base and passes through the button bracket. The first elastic reset member is installed on the button bracket and sleeved outside the limiting post hole. The limiting post hole not only makes the installation and axial expansion and contraction of the first elastic reset member more reliable, but also guides the button bracket.

[0014] Preferably, the button is provided with a first guide post that is slidably connected to the inner hole of the limiting post hole. This setting not only positions the button and the first elastic reset member, but also guides the direction of button pressing, making the button feel better and more stable when pressed.

[0015] Preferably, the button is further provided with a second guide post and a third guide post on both sides of the first guide post, and the base is also provided with guide holes that cooperate with the second and third guide posts. The button bracket is installed on the second and third guide posts. The second and third guide posts not only provide good guidance for the button, but also facilitate the installation of the button bracket.

[0016] Preferably, the base has a raised pad at the bottom to create a gap between the buttons and the control panel. This design prevents the buttons from being accidentally pressed by the control panel after the machine is placed on it.

[0017] Preferably, the heating wire assembly includes a support base and a heating wire. The support base is fixed inside the base and protrudes from the base at its top. The heating wire is U-shaped and mounted on the support base with its opening facing downwards. Conductive posts are provided at both ends of the heating wire. The conductive posts are embedded in the support base and their bottom ends protrude from the support base. When the button is pressed, the second battery spring contacts abut against the bottom ends of the conductive posts; when the button is released, the second battery spring contacts separate from the bottom ends of the conductive posts. This design facilitates the installation of the heating wire and the electrical connection between the heating wire and the battery assembly. Furthermore, the use of conductive posts increases the contact area, making the electrical connection more reliable.

[0018] Preferably, the first on / off structure further includes a second elastic reset member connected to the trigger frame. The trigger frame is also connected to the upper cover via a clutch structure. When the upper cover is flipped upwards, the trigger frame is separated from the upper cover, and the second elastic reset member applies a force to the trigger frame away from the first battery spring. When the upper cover is flipped downwards, the trigger frame is engaged with the upper cover, and the upper cover drives the trigger frame to rotate and connect with the first battery spring. This first on / off structure is simple and cleverly utilizes the clutch structure and the second elastic reset member to achieve the connection and separation of the trigger frame and the first battery spring.

[0019] Preferably, the clutch structure includes a pressure rod disposed on the upper cover and an arc-shaped guide groove disposed on the base. When the upper cover is flipped downwards, the pressure rod is driven to slide forward within the guide groove, and when it is flipped upwards, the pressure rod is driven to slide backwards within the guide groove. When the pressure rod slides forward to the first position of the guide groove, it presses against one side of the trigger frame and continues to slide to maintain the pressing state, causing the other side of the trigger frame to rotate and connect with the first battery spring. When the pressure rod slides backwards to the second position of the guide groove, it releases the trigger frame and continues to slide to maintain the released state. This clutch structure is very simple, yet it can reliably achieve the engagement and disengagement of the upper cover and the trigger frame. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an existing handheld sealing machine;

[0021] Figure 2 This is a schematic diagram of the handheld sealing machine of this utility model in the open state;

[0022] Figure 3 This is another structural diagram of the handheld sealing machine of this utility model in the open state;

[0023] Figure 4 This is a top view of the handheld sealing machine of this utility model in the open state;

[0024] Figure 5 for Figure 4 A cross-sectional view along the middle AA';

[0025] Figure 6 This is an exploded view of the handheld sealing machine of this utility model;

[0026] Figure 7 This is an internal schematic diagram of the concealed structure of the handheld sealing machine of this utility model;

[0027] Figure 8 The main illustration shows the interaction between the first and second on / off structures and the battery module when the first and second on / off structures are disconnected.

[0028] Figure 9This mainly shows a schematic diagram of the interaction between the first and second on / off structures and the battery module from another perspective when the first and second on / off structures are disconnected.

[0029] Figure 10 This is a schematic diagram of the handheld sealing machine of this utility model in the closed state;

[0030] Figure 11 This is a top view of the handheld sealing machine of this utility model in the closed state;

[0031] Figure 12 for Figure 11 Cross-sectional view at the midline BB';

[0032] Figure 13 The main illustration shows the interaction between the first and second on / off structures and the battery module in the on state.

[0033] Figure 14 The main display shows the position of the pressure rod in the guide groove when the lid is closed;

[0034] In the existing technical diagram: 1a-top cover, 2a-main support, 3a-bottom shell, 4a-first support, 5a-blade, 6a-second support, 7a-pressure head, 8a-pressure base, 9a-metal sheet, 10a-control board, 11a-battery, 12a-power button, 13a-cutting button, 14a-sealing button;

[0035] In the figures of this utility model: 1-base, 2-top cover, 3-heating wire assembly, 4-battery assembly, 5-battery, 6-first battery spring, 7-second battery spring, 8-first on / off structure, 9-second on / off structure, 10-touch frame, 11-button, 12-pressing part, 13-top rod, 14-button bracket, 15-first elastic reset member, 16-limiting post hole, 17-first guide post, 18-second guide post, 19-third guide post, 20-support base, 21-heating wire, 22-conductive post, 23-second elastic reset member, 24-first rotating shaft, 25-second rotating shaft, 26-pressure rod, 27-guide groove, 28-pressure head, 29-abutting part, 30-protective cover, 31-raising pad. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Example:

[0038] like Figure 2-7As shown, a handheld sealing machine includes a base 1 and a top cover 2. One side of the top cover 2 is hinged to the base 1, and a sealing device is provided between the top cover 2 and the base 1 on the other side. The sealing device includes a heating wire assembly 3 disposed on the base 1. A battery assembly 4 is also disposed inside the base 1. The battery assembly 4 includes at least two batteries 5 arranged side by side. Figure 8 , Figure 9 As shown, two first battery springs 6 and a first on / off structure 8 for switching the two first battery springs 6 are provided on one side of the battery assembly 4. Two second battery springs 7 and a second on / off structure 9 for switching the two second battery springs 7 are provided on the other side of the battery assembly 4. The first on / off structure 8 includes a touch frame 10 made of conductive material that is rotatably disposed in the base 1. The touch frame 10 is connected to the upper cover 2 and is used to separate the touch frame 10 from the first battery springs 6 when the upper cover 2 is flipped upward, and to connect the touch frame 10 to the first battery springs 6 when the upper cover 2 is flipped downward. The second on / off structure 9 includes a button 11 disposed at the bottom of the base 1. The button 11 is disposed below the heating wire assembly 3. The second battery springs 7 are disposed between the heating wire assembly 3 and the button 11 and are used to connect the second battery springs 7 to the heating wire assembly 3 when the button 11 is pressed. When button 11 is released, the second battery spring 7 separates from the heating wire assembly 3. In this embodiment, the battery assembly 4 and the heating wire assembly 3 are arranged side by side, and the battery assembly 4 is closer to the hinge between the top cover 2 and the base 1. The battery assembly 4 includes two batteries 5 arranged side by side. Two first battery springs 6 and two second battery springs 7 are respectively arranged on both sides of the battery assembly 4 and correspond to and are connected to the ends of the two batteries 5. The two second battery springs 7 are the positive and negative outputs of the battery assembly 4. When the two first battery springs 6 are connected, the two batteries 5 are connected in series, and the positive and negative terminals of the battery assembly 4 have outputs, that is, the two second battery springs 7 have outputs. Otherwise, when the two first battery springs 6 are disconnected, the two batteries 5 are disconnected, and the positive and negative terminals of the battery assembly 4 have no outputs, so the two second battery springs 7 also have no outputs.

[0039] In this embodiment, the handheld sealing machine uses a first on / off structure 8 to control the on / off state of the internal battery 5 of the battery assembly 4, and a second on / off structure 9 to control the on / off state between the battery assembly 4 and the heating wire assembly 3. This dual protection control obviously reduces the risk of accidental touch and misoperation, making it safer to use. Secondly, the button 11 of the second on / off structure 9 is located at the bottom of the base 1, making it difficult to find and greatly reducing the risk of accidental touch, thus making it safer to use. Thirdly, the first on / off structure 8 is associated with the flipping action of the upper cover 2, and the flipping action of the upper cover 2 actually corresponds to the actual operation action, because the upward... When the top cover 2 is flipped open, the packaging container is usually placed on the machine. At this time, the first on / off structure 8 disconnects the battery assembly 4, and the heating wire assembly 3 does not work, thus reducing the risk of burns during placement and making it safer to use. When the top cover 2 is flipped down to close, the opening of the packaging container is usually heat-sealed. At this time, it is also very appropriate to use the first on / off structure 8 to connect the internal battery 5 of the battery assembly 4. Moreover, the second on / off structure 9 is also related to the pressing action of the sealing device, and the pressing action of the sealing device corresponds to the actual operation action, because pressing the sealing device usually involves opening the bag opening. During heat sealing, the second on / off structure 9 connects the battery assembly 4 and the heating wire assembly 3, enabling the heating wire assembly 3 to operate and achieve heat sealing. Releasing the sealing device typically completes the heat sealing operation; at this point, the second on / off structure 9 disconnects the battery assembly 4 from the heating wire assembly 3, making it safer to use. Because the flipping action of the top cover 2 and the pressing action of the sealing device are both related to the actual operating actions, combining them with the first on / off structure 8 and the second on / off structure 9 respectively allows for accurate control of the on / off state of the internal battery 5 of the battery assembly 4 and the battery assembly itself, while reliably detecting the current operating status. The connection and disconnection between the battery assembly 4 and the heating wire assembly 3 further reduces the risk of accidental activation, making it safer to use. Furthermore, both the first and second connection / disconnection structures 8 and 9 are mechanical, which are more reliable and more consistent with actual operation compared to electronic switch signals, thus further reducing the risk of accidental activation and making it safer to use. In addition, when storing the device, even if the top cover 2 is closed and the first connection / disconnection structure 8 is activated, the second connection / disconnection structure 9 disconnects the battery assembly 4 from the heating wire assembly 3, keeping the machine in a non-working state. This not only saves energy but also takes up less space when stored.

[0040] like Figure 8 , Figure 9 As shown, one end of button 11 is provided with a pressing part 12, and the other end is provided with two push rods 13 that can abut against the second battery spring 7. The pressing part 12 is embedded outside the base 1, and the push rods 13 are located inside the base 1. This arrangement facilitates the operation of the pressing part 12 from the outside to realize the pressing action of the push rods 13 on button 11.

[0041] like Figure 8 , Figure 9 As shown, a button bracket 14 is provided at the end of button 11 away from the pressing part 12. Two push rods 13 are provided on the button bracket 14. A first elastic reset member 15 is also provided between the two push rods 13. One end of the first elastic reset member 15 abuts against the button bracket 14, and the other end abuts against the battery assembly 4. In this embodiment, the first elastic reset member 15 is a compression spring. The addition of the button bracket 14 facilitates the setting of the push rods 13 and the first elastic reset member 15. Setting the first elastic reset member 15 between the two push rods 13 can improve the feel of the button 11 when pressed and improve the synchronization of the two push rods 13, thereby ensuring the reliable connection and separation of the second on / off structure 9.

[0042] like Figure 5 As shown, the base 1 also has a limiting post hole 16 for installing the first elastic reset member 15. The limiting post hole 16 passes through the bottom of the base 1 and through the button bracket 14. The first elastic reset member 15 is installed on the button bracket 14 and sleeved outside the limiting post hole 16. The limiting post hole 16 not only makes the installation and axial expansion and contraction of the first elastic reset member 15 more reliable, but also guides the button bracket 14.

[0043] like Figure 5 As shown, the button 11 is provided with a first guide post 17 that is slidably connected to the inner hole of the limiting post hole 16. This setting can not only position the button 11 and the first elastic reset member 15, but also guide the pressing direction of the button 11, so that the button 11 has a better and more stable feel when pressed.

[0044] like Figure 9 , Figure 13 As shown, a second guide post 18 and a third guide post 19 are respectively provided on both sides of the first guide post 17 on the button 11. The base 1 is also provided with guide holes that cooperate with the second guide post 18 and the third guide post 19. The button bracket 14 is installed on the second guide post 18 and the third guide post 19. The second guide post 18 and the third guide post 19 not only provide a good guiding effect for the button 11, but also facilitate the installation of the button bracket 14.

[0045] like Figure 3 As shown, the bottom of the base 1 is also provided with a raising pad 31 to create a certain gap between the button 11 and the control panel. This feature prevents the button 11 from being accidentally pressed by the control panel after the machine is placed on it.

[0046] like Figure 6 As shown, the heating wire assembly 3 includes a support base 20 and a heating wire 21. The support base 20 is fixed inside the base 1 and its top protrudes outside the base 1. The heating wire 21 is U-shaped and installed on the support base 20 with its opening facing downwards. Conductive posts 22 are provided at both ends of the heating wire 21. Figure 9As shown, the conductive post 22 is embedded in the support base 20 with its bottom end protruding outside the support base 20. When the button 11 is pressed, the second battery spring 7 abuts against the bottom end of the conductive post 22, and when the button 11 is released, the second battery spring 7 separates from the bottom end of the conductive post 22. In this embodiment, a pressure head 28 is also provided directly above the heating wire assembly 3. The heating wire 21 is generally covered with high-temperature tape, and the outside of the pressure head 28 is usually covered with a heat insulation pad. The high-temperature tape can prevent the heating wire 21 from being directly exposed and causing excessive temperature and burning the user, and the heat insulation pad can prevent the temperature of the heating wire 21 from being transferred to the top cover 2 and causing burns. This setting facilitates the installation of the heating wire 21 and the electrical connection between the heating wire 21 and the battery assembly 4. Furthermore, the use of the conductive post 22 for connection can increase the contact area and make the electrical connection more reliable.

[0047] like Figure 8 , Figure 9 As shown, the first on / off structure 8 also includes a second elastic reset member 23 connected to the trigger frame 10. The trigger frame 10 is also connected to the upper cover 2 via a clutch structure. When the upper cover 2 is flipped upwards, the trigger frame 10 is separated from the upper cover 2, and the second elastic reset member 23 applies a force to the trigger frame 10 away from the first battery spring 6. When the upper cover 2 is flipped downwards, the trigger frame 10 is engaged with the upper cover 2, and the upper cover 2 drives the trigger frame 10 to rotate and connect with the first battery spring 6. This first on / off structure 8 is simple and cleverly utilizes the clutch structure and the second elastic reset member 23 to achieve the connection and separation of the trigger frame 10 and the first battery spring 6.

[0048] like Figure 6 As shown, the two sides of the upper cover 2 are hinged to the outer sides of the base 1 via the first pivot 24, and the two sides of the trigger frame 10 are hinged to the inner sides of the base 1 via the second pivot 25. The first pivot 24 and the second pivot 25 are close to each other and parallel to each other. This arrangement is reasonable, and the close proximity of the pivots of the upper cover 2 and the trigger frame 10 facilitates the connection between the upper cover 2 and the trigger frame 10.

[0049] like Figure 6 , Figure 7 , Figure 14 As shown, the clutch structure includes a pressure rod 26 mounted on the upper cover 2 and an arc-shaped guide groove 27 mounted on the base 1. When the upper cover 2 flips downwards, the pressure rod 26 slides forward within the guide groove 27, and when it flips upwards, the pressure rod 26 slides backwards within the guide groove 27. When the pressure rod 26 slides forward to the first position of the guide groove 27, it presses against one side of the trigger frame 10 and continues to slide to maintain the pressing state, causing the other side of the trigger frame 10 to rotate and connect with the first battery spring 6. When the pressure rod 26 slides backwards to the second position of the guide groove 27, it releases the trigger frame 10 and continues to slide to maintain the released state. This clutch structure is very simple, yet it can reliably achieve the engagement and disengagement of the upper cover 2 and the trigger frame 10.

[0050] Two pressure rods 26 and two guide grooves 27 are provided. The two guide grooves 27 are respectively located on both sides of the base 1, and the two pressure rods 26 are respectively located on both sides of the upper cover 2. This arrangement can make the force on the trigger frame 10 more even and the rotation more stable, thereby enabling the trigger frame 10 to connect more reliably with the first battery spring 6.

[0051] The trigger frame 10 is positioned below the first battery spring 6, which has a stop portion 29 that abuts against the top of the trigger frame 10. The second elastic reset member 23 is a tension spring. This arrangement is reasonable, and the connection between the trigger frame 10 and the first battery spring 6 is tighter and more reliable.

[0052] The second rotating shaft 25 is positioned above the first rotating shaft 24, and the guide groove 27 is positioned above the second rotating shaft 25. This arrangement is reasonable and facilitates the engagement and disengagement of the pressure rod 26 and the actuation frame 10.

[0053] The trigger frame 10 is U-shaped. When the two pressure rods 26 slide forward to the first position of the guide groove 27, they press against the two ends of the open side of the trigger frame 10 and continue to slide to drive the other side of the trigger frame 10 to rotate and connect with the first battery spring 6. This arrangement makes the trigger frame 10 lightweight and allows it to engage well with the pressure rods 26 and the first battery spring 6.

[0054] A protective cover 30 is also provided between the top cover 2 and the base 1. The protective cover 30 slides on the base 1 and can be movably closed onto the heating wire assembly 3. The sliding connection structure between the protective cover 30 and the base 1 can use existing technology. When the machine is not in use, the protective cover 30 covers the heating wire assembly 3, which can prevent the heating wire assembly 3 from being damaged by external force and can also prevent burns caused by possible misoperation. When the machine is in use, the protective cover 30 can be easily removed.

[0055] The working principle of this handheld sealing machine is as follows:

[0056] When it is necessary to seal the packaging container, such as Figure 2-9 As shown, flipping the top cover 2 upwards causes the pressure rod 26 to slide in the reverse direction within the guide groove 27. When the pressure rod 26 slides to the second position of the guide groove 27, it releases the trigger frame 10 and continues to slide to maintain the released state. During this process, the trigger frame 10 separates from the top cover 2. The second elastic reset member 23 applies a force away from the first battery spring 6 to the trigger frame 10, causing the battery 5 inside the battery assembly 4 to disconnect. The battery assembly 4 cannot supply power to the heating wire assembly 3, and the heating wire assembly 3 does not work. At this time, the protective cover 30 can be removed, and the bag opening of the packaging container can be safely placed between the pressure head 28 of the top cover 2 and the heating wire assembly 3 of the base 1. Flipping the top cover 2 downwards, as shown... Figure 10-14As shown, the pressure rod 26 slides forward within the guide groove 27. When the pressure rod 26 slides forward to the first position of the guide groove 27, it presses against one side of the trigger frame 10 and continues to slide to maintain the pressing state. During this process, the pressure rod 26 presses downward against one side of the trigger frame 10, causing the other side of the trigger frame 10 to rotate upward and connect with the first battery spring 6. The battery 5 inside the battery assembly 4 is conductive, and the second battery spring 7 has an output, that is, the first on / off structure 8 is conductive. Then, the sealing device between the upper cover 2 and the base 1 is pressed tightly. During the pressing process, the button 11 is also pressed down, so the second battery spring 7 is also connected to the heating wire assembly 3. When power is applied, the second on / off structure 9 is also connected. At this time, the battery assembly 4 supplies power to the heating wire assembly 3 through the second battery spring 7, thereby heat-sealing the bag opening of the packaging container clamped between the top cover 2 and the base 1. After the heat sealing is completed, the button 11 is released, and the first elastic reset member 15 drives the button 11 back to its initial position, so that the button 11 no longer presses against the second battery spring 7, and the second battery spring 7 separates from the heating wire assembly 3. The second on / off structure 9 is disconnected. Then, the top cover 2 is flipped upwards, and the first on / off structure 8 is also disconnected. At this time, the packaging container can be taken out. After use, the top cover 2 is flipped downwards to store it.

Claims

1. A handheld sealing machine, comprising a base (1) and a top cover (2), wherein one side of the top cover (2) is hinged to the base (1) and the other side is provided with a sealing device between the top cover (2) and the base (1), the sealing device comprising a heating wire assembly (3) disposed on the base (1), and a battery assembly (4) further comprising at least two batteries (5) arranged side by side, characterized in that: Two first battery contacts (6) and a first switching structure (8) for switching the two first battery contacts (6) on one side of the battery assembly (4) are provided. Two second battery contacts (7) and a second switching structure (9) for switching the two second battery contacts (7) on the other side of the battery assembly (4) are provided. The first switching structure (8) includes a trigger frame (10) made of conductive material that is rotatably disposed in the base (1). The trigger frame (10) is connected to the upper cover (2) and is used to make the trigger frame (10) contact the first battery contacts when the upper cover (2) is flipped upward. When the spring (6) is separated and the top cover (2) is flipped down, the trigger (10) is connected to the first battery spring (6). The second on / off structure (9) includes a button (11) located at the bottom of the base (1). The button (11) is located below the heating wire assembly (3). The second battery spring (7) is located between the heating wire assembly (3) and the button (11). When the button (11) is pressed, the second battery spring (7) is connected to the heating wire assembly (3). When the button (11) is released, the second battery spring (7) is separated from the heating wire assembly (3).

2. The handheld sealing machine according to claim 1, characterized in that: One end of the button (11) is provided with a pressing part (12) and the other end is provided with two push rods (13) that can abut against the second battery spring (7). The pressing part (12) is embedded outside the base (1) and the push rods (13) are located inside the base (1).

3. A handheld sealing machine according to claim 2, characterized in that: A button bracket (14) is provided at one end of the button (11) away from the pressing part (12). Two push rods (13) are provided on the button bracket (14). A first elastic reset member (15) is also provided between the two push rods (13). One end of the first elastic reset member (15) abuts against the button bracket (14), and the other end abuts against the battery assembly (4).

4. A handheld sealing machine according to claim 3, characterized in that: The base (1) is also provided with a limiting post hole (16) for installing the first elastic reset member (15). The limiting post hole (16) passes through the bottom of the base (1) and through the button bracket (14). The first elastic reset member (15) is installed on the button bracket (14) and sleeved outside the limiting post hole (16).

5. A handheld sealing machine according to claim 4, characterized in that: The button (11) is provided with a first guide post (17) that is slidably connected to the inner hole of the limiting post hole (16).

6. A handheld sealing machine according to claim 5, characterized in that: The button (11) is provided with a second guide post (18) and a third guide post (19) on both sides of the first guide post (17). The base (1) is also provided with guide holes that cooperate with the second guide post (18) and the third guide post (19). The button bracket (14) is installed on the second guide post (18) and the third guide post (19).

7. A handheld sealing machine according to claim 1, characterized in that: The base (1) is provided with a heightening pad (31) at the bottom so that there is a certain gap between the button (11) and the control panel.

8. A handheld sealing machine according to claim 1, characterized in that: The heating wire assembly (3) includes a support base (20) and a heating wire (21). The support base (20) is fixed inside the base (1) and its top protrudes outside the base (1). The heating wire (21) is U-shaped and installed on the support base (20) with its opening facing downwards. Conductive posts (22) are provided at both ends of the heating wire (21). The conductive posts (22) are embedded in the support base (20) and their bottom ends protrude outside the support base (20). When the button (11) is pressed, the second battery spring (7) abuts against the bottom end of the conductive post (22). When the button (11) is released, the second battery spring (7) separates from the bottom end of the conductive post (22).

9. A handheld sealing machine according to claim 1, characterized in that: The first switching structure (8) also includes a second elastic reset member (23) connected to the trigger frame (10). The trigger frame (10) is also connected to the upper cover (2) through a clutch structure. When the upper cover (2) is flipped upward, the trigger frame (10) is separated from the upper cover (2), and the second elastic reset member (23) applies a force away from the first battery spring (6) to the trigger frame (10). When the upper cover (2) is flipped downward, the trigger frame (10) is engaged with the upper cover (2), and the upper cover (2) drives the trigger frame (10) to rotate to connect with the first battery spring (6).

10. A handheld sealing machine according to claim 9, characterized in that: The clutch structure includes a pressure rod (26) on the upper cover (2) and an arc-shaped guide groove (27) on the base (1). When the upper cover (2) is flipped downward, the pressure rod (26) is driven to slide forward in the guide groove (27), and when it is flipped upward, the pressure rod (26) is driven to slide backward in the guide groove (27). When the pressure rod (26) slides forward to the first position of the guide groove (27), it presses against one side of the trigger frame (10) and continues to slide to maintain the pressing state, so that the other side of the trigger frame (10) rotates to connect with the first battery spring (6). When the pressure rod (26) slides backward to the second position of the guide groove (27), it releases the trigger frame (10) and continues to slide to maintain the released state.

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