DISPOSITIVO DE SOLDAGEM PARA MÁQUINA DE ACONDICIONAMENTO PORTÁTIL COM PEGA

Abstract

A welding device for a handheld packing machine having a handle (100). A motor (1) of the welding device drives, by means of a downward pressing and lifting motion assembly, a movable welding workpiece (21) to move downward; the welding device is provided with a connecting component (5) which can move back and forth synchronously with the lifting / lowering motion of the movable welding workpiece (21); the connecting component (5) is arranged on a rotating member (71); a reset driving member (6) is connected to the handle (100); the handheld packing machine is provided with a sensor; and after the welding is finished, the motor (1) starts to rotate reversely according to a signal of the sensor until transmission teeth (711) on the rotating member (71) and a gear (11) connected to the motor (1) are switched from a disengaged state to an engaged state.

Description

1 / 14 Welding device for portable packaging machine with handle. FIELD OF THE INVENTION

[001] The present invention relates to a welding device, in particular to a conditioning strip welding device for a portable conditioning machine with a handle. BACKGROUND OF THE INVENTION

[002] In portable electric wrapping machines, PET or PP strips are used to tie products or packages. The two parts of the strip to be bonded are thermally fused and joined by frictional heating. For a portable wrapping machine with a handle, the strip tensioning device alternates between the strip loading / unloading working state and the strip tensioning working state by raising and lowering the handle. When the handle is raised, the movable welding workpiece is raised along with it.For a welding device that adopts a single-motor drive system, i.e., the vibration drive and the downward pressure drive of the moving welding workpiece are driven by the same motor, a connection transition from disengagement to engagement is necessary between the downward pressure and lifting motion assembly and the motor-driven gear when the moving welding workpiece is reset and lifted. Conventionally, a portable packing machine with a handle whose welding devices adopt single-motor drive has solved this problem using elastic teeth or displacement teeth, but the effect is unsatisfactory and an uncomfortable jolting sensation easily occurs during the connection transition. SUMMARY OF THE INVENTION

[003] One objective of the present invention is to provide a welding device for a portable packaging machine with a handle, which allows the workpiece to be moved in the welding device and be lifted and held. Petition 870250083690, dated 09 / 17 / 2025, page 7 / 92 2 / 14 reset by activating the grip when the movable welding workpiece is reset and ensures smoother grip operation and a simpler structure. To achieve this objective, the present invention adopts the following solutions of the art:

[004] A welding device for a portable packaging machine with a handle, wherein the portable packaging machine is equipped with a handle for a tensioning mechanism, wherein the welding device comprises a movable welding workpiece, a motor and a downward pressure and lifting motion assembly for the movable welding workpiece, wherein the downward pressure and lifting motion assembly is equipped with a rotating member; wherein the rotating member corresponds to a gear connected to the motor through transmission teeth; wherein the motor drives, by means of the downward pressure and lifting motion assembly, the movable welding workpiece to move downwards, the welding device is equipped with a connecting component that can move forwards and backwards synchronously with the lifting / lowering motion of the movable welding workpiece,The welding device is equipped with a reset drive member; the reset drive member is connected to the handle; the connecting component is located in a position corresponding to the drive member; and when the movable welding workpiece is in the welding work position, the connecting component is located in the movement path of the reset drive member when the handle is lifted; and when the handle is lifted, the connecting component can be driven by the reset drive member to move in one direction, thus driving the movable welding workpiece through the downward and upward pressure movement assembly to the initial position; the portable packaging machine is equipped with a sensor; after the welding is finished, the motor starts. Petition 870250083690, dated 09 / 17 / 2025, page 8 / 92 3 / 14 to rotate in reverse according to a signal from the sensor until the transmission teeth on the rotating member and a gear connected to the motor are switched from an disengaged state to an engaged state.

[005] Based on the adoption of the above-mentioned technical solution, the present invention may adopt the following additional technical solutions, or use these additional technical solutions in combination:

[006] The downward pressure and lifting motion assembly is provided with a lifting assembly and a connecting rod mechanism, a lower end of the connecting rod mechanism is rotatably connected to the rotating member in a position offset from the center of rotation of the rotating member, and an upper end of the connecting rod mechanism is movably connected to the lifting assembly, the movable welding workpiece is mounted on a lower end of the lifting assembly.

[007] The rotating member is equipped with a position limiting fitting to limit the rotational travel of the rotating member in a second direction, wherein the second direction is opposite to the first direction and corresponds to the direction of rotation for lowering the moving welding workpiece; the position limiting fitting is fitted with a fixed position limiting structure to limit the maximum angle of rotation of the rotating member in the second direction.

[008] The handle is connected to the reset drive member by means of a rotating connection structure, and the geometric axis of rotation of the reset drive member is perpendicular to a geometric axis of rotation of the handle and parallel to a geometric axis of rotation of the rotating member.

[009] The rotary connection structure comprises a first rocker arm and a second rocker arm, the reset drive member and the second rocker arm are fixed together, the first rocker arm is rotationally connected to the handle and located below the handle, a first end of the second rocker arm is rotationally connected to the first rocker arm. Petition 870250083690, dated 09 / 17 / 2025, page 9 / 92 4 / 14 through a first liftable axis, the first axis is perpendicular to the geometric axis of rotation of the handle, a second end of the second rocker is rotationally connected to a base through a second axis.

[010] The welding device is further equipped with a second sensor, the position of the second sensor corresponds to the position where the position-limiting fitting piece just leaves the position-limiting structure when moving from the position that corresponds to the position-limiting structure in the first direction, and the second sensor forms a control combination for the motor together with the first sensor that detects the operation of the handle.

[011] The connecting component is connected to the rotating member.

[012] The energy of a vibration assembly of the welding device is derived from the motor through the connection of a transmission mechanism, and the welding device is not equipped with a separate drive motor for the vibration assembly; the second sensor detects the movement that the corresponding position-limiting fitting piece has just left when moving from the position corresponding to the position-limiting structure in the first direction.

[013] The control steps of the wrapping machine include: after the completion of a wrapping work round and the removal of a strip, the handle is lowered, the tensioning mechanism is in the tensioning work position, the moving welding piece is in the initial position and the reset drive member is in a position away from the connecting component;When a new round of wrapping work begins, the handle is lifted to release the strip; at this moment, the handle is raised and the connecting component is exactly at the end of the movement path of the reset drive member; after the strip is placed, the handle is lowered, the tensioning mechanism enters the tensioning working position, the tensioning mechanism motor is activated to tighten the strip, and at this moment, the reset drive member is again moved away from the connecting component; after the strip is tightened, the welding device motor is activated. Petition 870250083690, dated 09 / 17 / 2025, page 10 / 92 5 / 14 driven to make the rotating member rotate in the second direction, the moving welding workpiece descends to a welding working position, the transmission teeth on the rotating member and the gear connected to the motor go from an engaged state to a disengaged state, the connecting component moves with the rotating member until it is exactly in front of the reset drive member, and when the handle is lifted again, the rotating member will be moved by the reset drive member in the first direction, and the welding device motor continues to run for welding;After the welding work is completed, the handle is lifted, and the motor rotates in the opposite direction according to a signal from the sensor and stops until the transmission teeth on the rotating member and the gear connected to the motor are in the engaged state. The rotating member is then driven by the drive member to rotate, and the lifting assembly is engaged to raise the moving welding part, and it rises to the initial position. At the same time, the tensioning mechanism is raised and the packing strip is removed. After releasing the handle, the handle rotates and falls, and drives the reset drive member to rotate in the opposite direction of the connecting component, and automatically enters the next drawing cycle.

[014] The control combination uses the second sensor to obtain a second signal that the position-limiting fitting piece leaves the position-limiting structure, which represents that the rotating member has normally started the reset rotation, and the control combination uses the first sensor to obtain a signal that the handle starts to be lifted, so as to obtain a first signal that the strip needs to be removed after the welding is completed; when the first signal is obtained, the motor is caused to rotate in reverse by a small angle and, when the second signal is obtained, the motor is caused to stop rotating.

[015] Due to the adoption of the solutions of the technique of the present invention, the mobile welding workpiece can be redefined by operating the grip of the strip tensioning device and, through signal control, the machine Petition 870250083690, dated 09 / 17 / 2025, page 11 / 92 The 6 / 14 portable handle-operated housing can also achieve a smooth transition from an unengaged to an engaged state, eliminating the need for a separate reset connection mechanism with a one-way bearing and a rotary gear controlled by a program for start and stop timing. BRIEF DESCRIPTION OF THE DRAWINGS

[016] Figures 1a and 1b illustrate the change from engagement to disengagement in different operating states of the present invention. S1 shows the initial state of the entire machine, where the handle 100 is lowered, the tensioning mechanism is in the tensioning working position, the movable welding workpiece 21 is in the initial position and the reset drive member 6 is located away from the connecting component 5; S2 shows the state in which the handle is raised to release the strip, where the handle 100 is raised, but the connecting component 5 is just at the end of the movement path of the reset drive member 6, and the welding device is not affected by or interferes with the lifting of the tensioning mechanism;S3 shows the positions of the components in the tensioning working state, where the handle is lowered, and the tensioning mechanism motor 300 is started to tension the strip, at which point the reset drive member 6 is again moved away from the connecting component 5; S4 shows the positions of the components in the welding working state, after the tensioning is finished, the welding motor 1 is started to drive the rotating member 71 to rotate in the second direction, the movable welding workpiece 21 descends to the welding working position, the transmission teeth 711 and the gear 11 are just disengaged, the connecting component 5 moves with the rotating member 71 exactly in front of the reset drive member 6 (when the handle 100 is raised again, it will be driven by the reset drive member 6 to move in the first direction), and the welding motor 1 continues to operate for welding;S5 shows the strip removal and the status of; Petition 870250083690, dated 09 / 17 / 2025, page 12 / 92 7 / 14 Welding device reset after welding work is completed, handle 100 is lifted, the rotating member is driven by the drive member to rotate, so that the connecting rod mechanism moves in a linked manner, the lifting assembly rises, and the movable welding workpiece 21 returns to its initial position; at the same time, the tensioning mechanism is lifted to pick up the wrapping strip; S6 shows that, after S5, the handle is released, the handle rotates and falls, which drives the drive member to move away from the connecting component, so as to automatically enter the next wrapping cycle.

[017] Figure 2 is an exploded schematic structural diagram of an embodiment of the present invention.

[018] Figures 3 and 4 are schematic structural diagrams of one embodiment of the present invention viewed from different angles, respectively.

[019] Figures 5 and 6 are structural cross-sectional views of one embodiment of the present invention when the welding working mechanism is in the welding working state and returns to the initial position, respectively. DETAILED DESCRIPTION

[020] Referring to the accompanying drawings, the present invention provides a welding device for a portable packaging machine with a handle, wherein the portable packaging machine is provided with a handle 100 of a tensioning mechanism, and the handle 100 is rotatably mounted on the base 200 of the portable packaging machine. As the tensioning mechanism is not the object of concern of the present invention, the tensioning mechanism is omitted from the drawings. The tensioning mechanism is connected to the handle 100. During operation, the tensioning mechanism is lifted by raising the handle 100, which allows loading and unloading of the strip. After completion of the Petition 870250083690, dated 09 / 17 / 2025, page 13 / 92 8 / 14 loading or unloading, handle 100 is released and the tensioning mechanism and handle 100 rotate downwards by gravity, with the tensioning mechanism rotating to the tensioning working position.

[021] The welding device includes the movable welding workpiece 21, a motor 1 and a pressing and lifting motion assembly for the movable welding workpiece 21. The movable welding workpiece 21 is mounted at the lower end of the lifting assembly 3 in the pressing and lifting motion assembly.

[022] The welding device is equipped with a lower fixed welding plate 22 below the movable welding workpiece 21. When the movable welding workpiece 21 descends to engage the lower fixed welding plate 22 to press the joint of the wrapping strip, the vibration assembly 4 of the welding device acts on the lifting assembly 3 to generate vibration, which is then transmitted to the movable welding workpiece 21, causing the vibration of the movable welding workpiece 21 to rub the wrapping strip for thermal fusion bonding. The structures of the downward and upward pressing motion assembly, the vibration assembly 4, the movable welding workpiece 21 and the lower fixed welding plate 22 can all adopt existing technologies.

[023] The downward pressing and lifting motion assembly is provided with a rotating member 71, which is provided with drive teeth 711. The drive teeth 711 are engaged to a gear 11 of the motor 1, which transitions from an engaged state to a disengaged state when the movable welding workpiece 21 is pressed down, and from a disengaged state to an engaged state when the movable welding workpiece 21 is reset. The motor 1 drives, by means of a downward pressing and lifting motion assembly, a lifting assembly 3 to move downwards, while the upward motion of the lifting assembly 3 is driven by lifting the handle 100, which is the same action as lifting. Petition 870250083690, dated 09 / 17 / 2025, page 14 / 92 9 / 14 the tensioning mechanism, which not only makes the operation very convenient, but also forms an interlocking effect to ensure that no packaging error occurs.

[024] The welding device is equipped with a connecting component 5 that can move forward and backward synchronously with the raising / lowering movement of the mobile welding workpiece 21. The connecting component 5 is arranged in a rotating member 71. The welding device is equipped with a reset drive member 6, and the reset drive member 6 is connected to the handle 100. The position of the connecting component 5 corresponds to that of the drive member 6. When the mobile welding workpiece 21 is in the welding work position, the connecting component 5 is located in the path of movement of the reset drive member 6 when the handle 100 is raised. When the handle is raised, the connecting component 5 can be driven by the reset drive member 6 to move in the first direction.In this mode, the rotating member 71 rotates clockwise at this moment, and the movable welding workpiece 21 is driven by the downward pressure and lifting motion assembly to return to the initial position (see Figure 6).

[025] The downward pressure and lifting motion assembly is further provided with a connecting rod mechanism, a lower end of the connecting rod mechanism is rotatably connected to the rotating member 71 in a position that deviates from the center of rotation of the rotating member 71, and an upper end of the connecting rod mechanism is movably connected to the upper end of the lifting assembly 3.

[026] A connecting rod mechanism of the downward and upward pressing motion assembly includes a first connecting rod 31 and a second connecting rod. The first connecting rod is rotatably connected to the top of a base 200 by means of a shaft pin 33. One end of the first connecting rod 31 is rotatably connected to a Petition 870250083690, dated 09 / 17 / 2025, page 15 / 92 10 / 14 upper end of the lifting assembly 3, a second end of the first connecting rod 31 is rotatably connected to an upper end of the second connecting rod, and a lower end of the second connecting rod is rotatably connected to a rotating member 71 in a position that deviates from the center of rotation of the rotating member 71 by means of a rotating connecting shaft 74. The second connecting rod is preferably an elastic rod. The second connecting rod includes an upper connecting rod 321 and a lower connecting rod 322. The lower connecting rod 322 is connected to a central rod 323, which allows for sliding connection between the upper connecting rod 321 and the lower connecting rod 322 through the central rod 323. A compression spring 324 is disposed between the upper connecting rod 321 and the lower connecting rod 322, with the compression spring 324 encased in the central rod 323.The upper connecting rod 321 is rotatably connected to the first connecting rod 31, and the lower connecting rod 322 is rotatably connected to the rotating member 71. In this embodiment, the lifting assembly 3 employs a lifting column, the lower part of which has a hole to accommodate the vibration assembly 4 and receive the vibration from the vibration assembly 4; the upper part has a compression spring to press the vibration assembly downwards, so as to dampen and eliminate play in the parts, and the outer side has a guide cylinder for lifting the lifting column.

[027] During implementation, preferably, the rotating connecting shaft 74 of the rotating member 71 and the second connecting rod (lower connecting rod 322) can be lengthened, and the connecting component 5 directly uses the end of the rotating connecting shaft 74.

[028] The rotating member 71 is equipped with a position-limiting fitting 73 for the rotation of the rotating member in a second direction. The second direction is opposite to the first direction and is the direction of rotation for lowering the mobile welding workpiece. In this embodiment, for the second direction, the rotating member 71 rotates counterclockwise. The workpiece Petition 870250083690, dated 09 / 17 / 2025, page 16 / 92 The 1 1 / 4" position-limiting fitting 73 is combined with a fixed position-limiting structure 201 to limit the rotational stroke in the second direction. Depending on the position, the matching between the position-limiting structure 201 and the position-limiting fitting 73 in another position can form a position-limiting match for the rotating member 71 in the first direction. The fixed position-limiting structure 201 can be fixed to the base or be a configuration on the base 200. This position-limiting match ensures smooth operation, so that during welding, the connecting component 5 stops in a reasonable position and, after welding is completed, the drive member 6 can smoothly drive the connecting component 5 to drive the rotating member 71 to rotate smoothly in the first direction.

[029] The handle 100 is connected to the reset drive member 6 by means of a rotating connecting structure, such that the geometric axis of rotation of the reset drive member 6 is perpendicular to the geometric axis of rotation of the handle 100, parallel to the geometric axis of rotation of the rotating member 71, located below the handle and coincident with the height of the rotating member 71. When the reset drive member 6 rotates and lifts, it does not interfere with the handle 100 when it rotates and falls, thus improving the overall utilization of the machine space. Meanwhile, the handle 100 and the connecting rod structure are orthogonal, located below the first connecting rod 31, which makes the structure more compact.

[030] In this embodiment, the rotary connection structure includes a first rocker arm 61 and a second rocker arm 62. The reset drive member 6 and the second rocker arm 62 are fixed together. The upper end of the first rocker arm 61 is rotatably connected to the handle 100 by means of a shaft 63 and is located below the handle. The shaft 63 is parallel to the geometric axis of rotation 101 of the handle. The first end of the second rocker arm is rotatably connected to the lower end of the first rocker arm by means of a first liftable shaft 64, and the first shaft 64 is Petition 870250083690, dated 09 / 17 / 2025, page 17 / 92 12 / 14 perpendicular to the geometric axis of rotation of the handle 100. The second end of the second rocker arm 62 is rotatably connected to the base 200 by means of a second shaft. In this embodiment, the second shaft and the shaft 712 of the rotating member 71 are coaxial, and the rotating member 71 is rotatably connected to the shaft 712, while the second rocker arm 62 is movably coated on the shaft 712.

[031] A slot 102 can be formed in the handle to accommodate the upper end of the first rocker arm 61 and set the shaft 63.

[032] The welding device is also equipped with a second sensor 8. The position of the second sensor 8 corresponds to the position where the position-limiting fitting 73 has just left the position-limiting structure 201 after moving in the first direction from the engagement position with the position-limiting structure 201. This second sensor 8 also forms a control combination with the first sensor 103, which detects when the lever 100 is lowered to the position (controlling the motor tensioning mechanism 300, which starts operating when the start button is pressed). Specifically, this combination allows the sensor (the second sensor 8) to obtain a second signal indicating that the position-limiting fitting 73 has left the position-limiting structure 201, indicating that the rotating member 71 has correctly started its reset rotation.The first sensor 103 also detects the start of the lifting of the handle 100, thus obtaining a first signal indicating that the strip needs to be removed after welding. Therefore, when the first signal is received, the motor 1 can be rotated slightly in the opposite direction. When the second signal is received, the motor 1 stops rotating, which ensures perfect gear engagement and smooth movement of the handle 100 when lifting and lowering the welding workpiece 21, while requiring almost no additional power from the motor 1.

[033] The second sensor 8 can be directly associated with the position-limiting clamping piece 73 to detect its position, and can also be combined with other moving parts associated with the movement of the piece. Petition 870250083690, dated 09 / 17 / 2025, page 18 / 92 13 / 14 position limiting fastener 73. The first sensor 103 can be directly associated with the handle 100 to detect its position and can also be directly combined with other moving parts associated with the movement of the handle 100.

[034] In this embodiment, the vibration assembly 4 is powered by motor 1. The power input shaft 41 is drivenly connected to the output shaft of motor 1 by means of a strip drive mechanism 40. The drive wheel of the strip drive mechanism 40 is larger than the driven wheel, which increases the vibration frequency of the vibration assembly. The vibration assembly 4 employs an eccentric shaft arrangement.

[035] Unless otherwise specified in the description of the present invention, the orientation or positional relationship indicated by terms such as “upper”, “lower”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, etc., is based on the orientation or positional relationship shown in the figures, and serves only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have the specific orientation, construction and operation in the particular orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are used for illustrative purposes only and cannot be understood as limitations of the present invention. A person of ordinary skill in the art can understand the specific meaning of the above terms in conjunction with the accompanying drawings according to specific circumstances.

[036] Unless expressly specified and limited otherwise in the present invention, the terms supplied / arranged, fixed and connected shall be interpreted broadly, for example, they may be a fixed connection, a detachable connection or an integral connection; they may be a direct connection, or an indirect connection by means of an intermediate means, or even an internal communication between two elements. A person of ordinary skill in the art can understand the specific meaning of the above terms. Petition 870250083690, dated 09 / 17 / 2025, page 19 / 92 14 / 14 according to specific circumstances.

[037] The above description describes only the specific embodiments of the present invention, but the structural features of the present invention are not limited to them. Any alterations or modifications made by persons skilled in the art in the field of the present invention shall be within the scope of protection of the present invention. Petition 870250083690, dated 09 / 17 / 2025, p. 20 / 92

Claims

1 / 5 CLAIMS 1. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, characterized in that the portable packaging machine is equipped with a handle for a tensioning mechanism, wherein the welding device comprises a movable welding workpiece, a motor and a downward pressing and lifting motion assembly for the movable welding workpiece, wherein the downward pressing and lifting motion assembly is equipped with a rotating member; wherein the rotating member corresponds to a gear connected to the motor through transmission teeth; wherein the motor drives, by means of the downward pressing and lifting motion assembly, the movable welding workpiece to move downwards, the welding device is equipped with a connecting component that can move forwards and backwards synchronously with the lifting / lowering motion of the movable welding workpiece,The welding device is equipped with a reset drive member; the reset drive member is connected to the handle; the connecting component is located in a position corresponding to the drive member; and when the movable welding workpiece is in the welding work position, the connecting component is located in the movement path of the reset drive member when the handle is lifted; and when the handle is lifted, the connecting component can be driven by the reset drive member to move in a first direction, which thus drives the movable welding workpiece by the assembly of downward pressure and lifting movements to the initial position; the portable packaging machine is equipped with a sensor, after the welding is finished,The motor begins to rotate in reverse according to a signal from the sensor until the transmission teeth on the rotating member and a gear connected to the motor alternate from an disengaged to an engaged state. Petition 870250083690, dated 09 / 17 / 2025, page 21 / 92 2 / 5, 2. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 1, characterized in that the pressing-down and lifting motion assembly is provided with a lifting assembly and a connecting rod mechanism, a lower end of the connecting rod mechanism is rotatably connected to the rotating member in a position that deviates from the center of rotation of the rotating member, and an upper end of the connecting rod mechanism is movably connected to the lifting assembly, the movable welding workpiece is mounted on a lower end of the lifting assembly.

3. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 1, characterized in that the rotating member is provided with a position-limiting fitting to limit the rotational stroke of the rotating member in a second direction, the second direction being opposite to the first direction and the direction of rotation to lower the movable welding workpiece; the position-limiting fitting is combined with a fixed position-limiting structure to limit the maximum angle of rotation of the rotating member in the second direction.

4. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 1, characterized in that the handle is connected to the reset drive member by means of a rotating connection structure, and the geometric axis of rotation of the reset drive member is perpendicular to a geometric axis of rotation of the handle and parallel to a geometric axis of rotation of the rotating member.

5. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 4, characterized by the rotating connection structure comprising a first rocker arm and a second rocker arm, the drive member of Petition 870250083690, dated 09 / 17 / 2025, page 22 / 92 3 / 5 redefinition and the second rocker arm are fixed together, the first rocker arm is rotationally connected to the handle and is located below the handle, a first end of the second rocker arm is rotationally connected to the first rocker arm through a first liftable shaft, the first shaft is perpendicular to the geometric axis of rotation of the handle, a second end of the second rocker arm is rotationally connected to a base through a second shaft.

6. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 3, characterized in that the welding device is additionally provided with a second sensor, the position of the second sensor corresponds to the position where the position-limiting fitting piece just leaves the position-limiting structure when moving from the position corresponding to the position-limiting structure in the first direction, and the second sensor forms a control combination for the motor together with the first sensor that detects the operation of the handle.

7. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 3, characterized in that the connecting component is connected to the rotating member.

8. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 6, characterized in that the energy of a vibration assembly of the welding device is derived from the motor through the connection of a transmission mechanism, and the welding device does not have a separate drive motor for the vibration assembly; the second sensor detects the movement that the corresponding position-limiting adjustment piece has just left when moving from the position corresponding to the position-limiting structure in the first direction.

9. WELDING DEVICE FOR A PORTABLE WRAPPING MACHINE WITH A HANDLE, according to claim 3, characterized in that the control steps of the wrapping machine include: after the completion of a wrapping work round and the removal of a strip, the handle is lowered, the tensioning mechanism is in the tensioning work position, the movable welding workpiece is in the initial position, and the reset drive member is in a position away from the connecting component; when a new wrapping work round begins, the handle is lifted to release the strip, at that moment, the handle is lifted and the connecting component is exactly at the end of the movement path of the reset drive member;After the strip is placed, the handle is lowered, the tensioning mechanism enters the tensioning working position, the tensioning mechanism motor is activated to tighten the strip, and at that moment, the reset drive member is again moved away from the connecting component; after the strip is tightened, the welding device motor is activated to rotate the rotating member in the second direction, the movable welding workpiece descends to a welding working position, the transmission teeth on the rotating member and the gear connected to the motor go from an engaged state to a disengaged state, the connecting component moves with the rotating member to well in front of the reset drive member, and when the handle is raised again, the rotating member will be driven by the reset drive member to move in the first direction, and the welding device motor continues to run for welding;After the welding work is finished, the grip is lifted and the motor rotates in reverse according to a signal from the sensor and stops until the transmission teeth on the rotating member and a gear connected to the motor are in the engaged state, the rotating member is driven by the drive member to rotate, and the lifting assembly is engaged to raise, and the movable welding workpiece rises to the initial position; meanwhile, Petition 870250083690, dated 09 / 17 / 2025, page 24 / 92 5 / 5 the tensioning mechanism is raised and the containment strip is removed; after releasing the grip, the grip rotates and descends, and drives the reset drive member to rotate away from the connecting component, and automatically enters the next drawing cycle.

10. WELDING DEVICE FOR A PORTABLE PACKAGING MACHINE WITH A HANDLE, according to claim 9, characterized in that the welding device is additionally provided with a second sensor, the position of the second sensor corresponds to the position in which the position-limiting fitting piece just leaves the position-limiting structure when moving from the position corresponding to the position-limiting structure in the first direction, and the second sensor forms a control combination for the motor together with the first sensor that detects the operation of the handle;The control combination uses the second sensor to obtain a second signal that the position-limiting fitting is coming out of the position-limiting structure, which represents that the rotating member has normally started the reset rotation, and the control combination uses the first sensor to obtain a signal that the handle is starting to be lifted, in order to obtain a first signal that the strip needs to be removed after welding is completed; when the first signal is obtained, the motor is driven to rotate in reverse at a small angle and, when the second signal is obtained, the motor is driven to stop rotating. Petition 870250083690, dated 09 / 17 / 2025, p. 25 / 92;

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