A handheld winding device

Abstract

This application relates to a handheld wrapper, which includes a frame, a stretching structure, and a fixing cylinder. The frame includes a mounting part, the stretching structure is mounted on the mounting part, and the fixing cylinder is connected to the stretching structure. The stretching structure can drive the fixing cylinder to move vertically downward relative to the frame, thus placing the handheld wrapper in a locked state. The fixing cylinder can drive the stretching structure to move vertically upward relative to the frame, thus placing the handheld wrapper in an unlocked state, in which the fixing cylinder can rotate. During packaging, the user can control the stretching force of the wrapping film through the stretching structure, keeping the wrapping film constantly stretched during the packaging process, thereby improving packaging efficiency, reducing the amount of wrapping film used, and saving packaging costs.

Description

Technical Field

[0001] This application relates to the field of winder technology, and more particularly to a handheld winder. Background Technology

[0002] Stretch wrapping is very common in the logistics industry. To improve logistics efficiency and avoid stacking during transportation, the demand for stretch wrap is very high. For some industries with a high degree of manual labor, automated equipment cannot be introduced due to site constraints. Handheld wrappers are usually used, requiring workers to wrap and pack manually throughout the process. However, currently available handheld wrappers make it impossible for workers to control the stretching force of the stretch wrap, resulting in low packing efficiency and large fluctuations in stretch wrap usage, which easily leads to waste of stretch wrap. Summary of the Invention

[0003] This application provides a handheld wrapper that can control the force with which the user stretches the wrapping film, ensuring that the wrapping film remains in a stretched state when the user uses the handheld wrapper for packing, thereby improving packing efficiency, reducing the amount of wrapping film used, and saving packing costs.

[0004] This application provides a handheld winder, including a frame, a tensioning structure, and a fixing cylinder. The frame includes a mounting portion; the tensioning structure is mounted on the mounting portion; the fixing cylinder is connected to the tensioning structure; wherein, the tensioning structure can drive the fixing cylinder to move downward in a vertical direction relative to the frame, so that the handheld winder is in a locked state; the fixing cylinder can drive the tensioning structure to move upward in a vertical direction relative to the frame, so that the handheld winder is in an unlocked state, and in the unlocked state, the fixing cylinder can rotate.

[0005] In one possible design, the mounting portion includes a first cavity and a second cavity that are interconnected, with the second cavity bent relative to the first cavity; the tensioning structure includes a horizontal shaft, an elastic element, and a fixing element; the horizontal shaft is mounted in the first cavity, and the fixing sleeve is sleeved on the horizontal shaft; the elastic element is mounted in the second cavity, with one end connected to the horizontal shaft and the other end connected to the fixing element, and the fixing element is mounted on the side wall of the mounting portion; the horizontal shaft is capable of moving vertically within the first cavity to lock or unlock the handheld winder.

[0006] In one possible design, the fixing member includes a knob and a rotating shaft, and the elastic member includes a first connector, a second connector, and a body; one end of the body is connected to the horizontal shaft through the first connector, and the other end is connected to the rotating shaft through the second connector; rotating the knob can cause the second connector to be rolled up or unfolded on the rotating shaft.

[0007] In one possible design, the sidewall of the second cavity is provided with a first snap-fit ​​position and a second snap-fit ​​position in sequence along the vertical direction; the elastic member includes a first connector and a body, one end of the body is connected to the horizontal axis through the first connector, and the other end is connected to the fixing member; the fixing member can be snapped and fixed with the first snap-fit ​​position and the second snap-fit ​​position respectively.

[0008] In one possible design, the horizontal axis is provided with a snap-fit ​​portion, and the side wall of the mounting portion is provided with a snap-fit ​​mating portion; in the locked state, the snap-fit ​​portion snaps into the snap-fit ​​mating portion.

[0009] In one possible design, the snap-fit ​​part includes a snap-fit ​​groove and a circular groove that are interconnected; in the locked state, the snap-fit ​​part snaps into the snap-fit ​​groove; in the unlocked state, the snap-fit ​​part can move along the snap-fit ​​groove to the circular groove and can rotate within the circular groove.

[0010] In one possible design, the horizontal axis further includes a first connecting shaft and a second connecting shaft, the cross-sectional dimension of the second connecting shaft being smaller than that of the first connecting shaft and the snap-fit ​​portion; one end of the first connecting shaft is connected to the fixed cylinder, and the other end is connected to the second connecting shaft; the elastic element is sleeved on the second connecting shaft; one end of the snap-fit ​​portion is connected to the second connecting shaft, and the other end engages with the snap-fit ​​mating portion.

[0011] In one possible design, the cross-sectional shape of the snap-fit ​​portion is one of square, hexagonal, or gear-shaped.

[0012] In one possible design, the fixing cylinder is provided with a plurality of positioning protrusions, which are spaced apart along the outer periphery of the fixing cylinder.

[0013] In one possible design, the positioning protrusion is one of a cone, a triangular pyramid, or a square pyramid.

[0014] In this application, the film tube of the stretch film can be installed on a fixed tube. When the user uses a handheld wrapper to pack, a portion of the stretch film is fixed to the goods to be packed. The user holds the handle and pulls the handheld wrapper downwards in the vertical direction, causing the stretch film to experience a downward pulling force in the vertical direction. According to the principle of force, the stretch film also exerts an upward pulling force on the fixed tube in the vertical direction, thereby causing the fixed tube to pull the stretching structure upwards in the vertical direction. At the same time, the stretching structure also pulls the fixed tube downwards in the vertical direction. As the user gradually increases the force of pulling the handheld wrapper, the pulling force on the stretch film also increases, resulting in a greater pulling force exerted by the stretch film on the fixed tube. The force will also increase. When the tension of the stretch film on the fixed cylinder is greater than the tension of the stretching structure on the fixed cylinder, the stretch film can pull the fixed cylinder and drive the stretching structure to move upward in the vertical direction, thereby putting the handheld wrapper in the unlocked state. At this time, the fixed cylinder can rotate, allowing the stretch film installed on the fixed cylinder to unfold between the wrapper and the goods for packaging. When the external force is removed, the tension of the stretching structure on the fixed cylinder is greater than the tension of the stretch film on the fixed cylinder, thereby allowing the stretching structure to drive the fixed cylinder to move downward in the vertical direction, putting the handheld wrapper in the locked state. The fixed cylinder is locked and cannot rotate, thereby preventing the stretch film from being pulled out and stopping the packaging. Because stretch film is flexible, it will stretch and deform under tension, causing it to lengthen. Furthermore, the stretch film is under constant tension during the packing process. Therefore, when using the handheld wrapper of this application for packing, the user can control the stretching force of the stretch film through the stretching structure, keeping the stretch film constantly stretched during packing. This reduces the amount of stretch film used. After packing, the handheld wrapper also self-locks to prevent excess stretch film from unwinding, further reducing waste and usage, and saving packing costs. Simultaneously, the shrinkage force of the stretch film makes the packed goods more secure, preventing goods from collapsing during transportation due to loose packing, thus improving packing efficiency.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0016] Figure 1 A half-sectional view of the handheld winder provided in this application, wherein the handheld winder is in a locked state;

[0017] Figure 2 for Figure 1 Side view;

[0018] Figure 3 A half-sectional view of the handheld winder provided in this application, wherein the handheld winder is in an unlocked state;

[0019] Figure 4 for Figure 2Side view;

[0020] Figure 5 for Figure 1 A schematic diagram of a tension structure.

[0021] Figure label:

[0022] 1-Framework;

[0023] 11-Installation Department;

[0024] 111 - First cavity;

[0025] 112 - Second cavity;

[0026] 113-Sidewall;

[0027] 114 - Connecting part;

[0028] 114a-Card slot;

[0029] 114b - Circular groove;

[0030] 12-Handheld part;

[0031] 2-Stretch structure;

[0032] 21 - Horizontal axis;

[0033] 311 - First connecting shaft;

[0034] 312 - Second connecting shaft;

[0035] 313-Connecting part;

[0036] 22-Elastic element;

[0037] 221 - First connector;

[0038] 222 - Second connector;

[0039] 223-Ontology;

[0040] 23-Factor;

[0041] 231 - Knob;

[0042] 232 - Rotation axis;

[0043] 3-Fixed cylinder;

[0044] 31-Positioning protrusion;

[0045] X - Vertical direction.

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0047] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0049] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0051] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0052] This application provides a handheld wrapper, such as Figures 1 to 5 As shown, the handheld winder includes a frame 1, a tensioning structure 2, and a fixing cylinder 3. The frame 1 includes a mounting part 11, the tensioning structure 2 is mounted on the mounting part 11, and the fixing cylinder 3 is connected to the tensioning structure 2. The tensioning structure 2 can drive the fixing cylinder 3 to move downwards in the vertical direction X relative to the frame 1 (the direction indicated by the arrow in the figure is the positive direction), so that the handheld winder is positioned as shown in the figure. Figure 1 and Figure 2 The locked state shown; the fixed cylinder 3 can drive the tension structure 2 to move upward in the vertical direction X relative to the frame 1, so that the handheld winder is in the locked state as shown. Figure 3 and Figure 4 In the unlocked state, the fixed cylinder 3 can rotate.

[0053] In this embodiment, the film tube of the stretch film can be installed on the fixed cylinder 3. When the user uses the handheld wrapper for packing, a portion of the stretch film is fixed to the goods to be packed. The user holds the handle 12 and pulls the handheld wrapper downwards in the vertical direction X (the direction indicated by the arrow in the figure is the positive direction). This causes the stretch film to be pulled downwards in the vertical direction X. According to the principle of force, the stretch film also exerts a pulling force on the fixed cylinder 3 upwards in the vertical direction X. This causes the fixed cylinder 3 to pull the stretching structure 2 upwards in the vertical direction X. At the same time, the stretching structure 2 also pulls the fixed cylinder 3 downwards in the vertical direction X. As the force of the user pulling the handheld wrapper gradually increases, the tension on the stretch film also increases, which in turn increases the tension exerted by the stretch film on the fixed cylinder 3. When the tension of the stretch film on the fixed cylinder 3 is greater than the tension of the stretching structure 2 on the fixed cylinder 3, the stretch film can pull the fixed cylinder 3, causing the stretching structure 2 to move upwards in the vertical direction X. This allows the handheld wrapper to be positioned as follows: Figure 3 and Figure 4 In the unlocked state, the fixed cylinder 3 can rotate, allowing the stretch film mounted on the fixed cylinder 3 to unfold and pack between the wrapper and the goods. When the external force is removed, the tension force of the tension structure 2 on the fixed cylinder 3 is greater than the tension force of the stretch film on the fixed cylinder 3, thus allowing the tension structure 2 to drive the fixed cylinder 3 to move downwards in the vertical direction X, so that the handheld wrapper is in the position of... Figure 1 and Figure 2 In the locked state shown, the fixed cylinder 3 is locked and cannot rotate, thus preventing the stretch film from being pulled out and stopping the packing process. Because the stretch film is flexible, it undergoes tensile deformation under tension, causing it to stretch and lengthen. Furthermore, the stretch film is under constant tension during the packing process. Therefore, when using the handheld wrapper of this application for packing, the user can control the stretching force of the stretch film through the stretching structure 2, ensuring the film remains under constant tension during packing. This reduces the amount of stretch film used. After packing, the handheld wrapper also self-locks to prevent excess stretch film from escaping, further reducing waste and usage, and saving packing costs. Simultaneously, the retraction force of the stretch film makes the packed goods more secure, preventing the goods from collapsing during transportation due to loose packing, thus improving packing efficiency.

[0054] In one specific embodiment, such as Figures 1 to 4As shown, the mounting part 11 includes a first cavity 111 and a second cavity 112 that are interconnected, and the second cavity 112 is bent relative to the first cavity 111; the tensioning structure 2 includes a horizontal shaft 21, an elastic element 22 and a fixing element 23. The horizontal shaft 21 is mounted on the first cavity 111, the fixing cylinder 3 is sleeved on the horizontal shaft 21, the elastic element 22 is mounted on the second cavity 112, one end of the elastic element 22 is connected to the horizontal shaft 21, and the other end is connected to the fixing element 23. The fixing element 23 is mounted on the side wall 113 of the mounting part 11; the horizontal shaft 21 can move in the vertical direction X within the first cavity 111 to put the handheld winder in a locked or unlocked state.

[0055] In this embodiment, during the process of the user gripping the handle 12 and pulling the hand-held wrapper for packaging, the fixing cylinder 3 pulls the horizontal shaft 21 upward in the vertical direction X, causing the horizontal shaft 21 to pull the elastic element 22 upward in the vertical direction X. Since the fixing member 23 is fixed to the side wall of the mounting part 11, the end of the elastic element 22 connected to the fixing member 23 is fixed, so that the elastic element 22 also pulls the horizontal shaft 21 downward in the vertical direction X. When the pulling force of the fixing cylinder 3 on the horizontal shaft is greater than the pulling force of the elastic element 22 on the horizontal shaft 21, the fixing cylinder 3 can drive the horizontal shaft 21 to move upward in the vertical direction X within the first cavity 111, so that the elastic element 22 in the second cavity 112 is stretched between the fixing member 23 and the horizontal shaft 21, thereby placing the hand-held wrapper in a position such that... Figure 3 and Figure 4 In the unlocked state, the user can pull the stretch film between the handheld wrapper and the goods for packaging. After packaging is completed and the external force is removed, under the elastic force of the elastic element 22, the elastic element 22 can drive the horizontal axis 21 to move downward in the vertical direction X within the first cavity 111, so that the handheld wrapper is in the position of... Figure 1 and Figure 2 The locking state shown prevents the stretch film from being pulled out further, thus stopping the packing process. This stretching structure 2 controls the tension on the stretch film during packing by using the elastic element 22, improving the utilization rate of the stretch film, reducing the amount of stretch film used, and the structure is simple, easy to implement, and low in cost. It also reduces the weight of the handheld wrapper, making it more labor-saving, reducing the user's workload, and improving packing efficiency.

[0056] In one specific embodiment, such as Figure 1 , Figure 3 and Figure 5 As shown, the fixing member 23 includes a knob 231 and a rotating shaft 232, and the elastic member 22 includes a first connecting member 221, a second connecting member 222 and a body 223; one end of the body 223 is connected to the horizontal shaft 21 through the first connecting member 221, and the other end is connected to the rotating shaft 232 through the second connecting member 222. Rotating the knob 231 can cause the second connecting member 222 to be rolled up to the rotating shaft 232 or unfolded.

[0057] In this embodiment, as Figure 1 In the locked state shown, rotating knob 231 winds the second connector 222 onto the rotating shaft 232, increasing the stretch length of the elastic element 22 between the horizontal shaft 21 and the rotating shaft 232. Since the stretch length of the elastic element 22 is proportional to the tension force, the tension force of the elastic element 22 on the horizontal shaft 21 increases, thereby increasing the pulling force required by the user to pull the hand-held wrapper for packing. This results in increased tension on the wrapping film, further increasing the stretch length of the wrapping film, thus reducing the amount of wrapping film used and saving packing costs. As the temperature decreases, the wrapping film is prone to embrittlement and reduced tensile strength. Therefore, excessive stretching can cause the wrapping film to break, reducing packing efficiency. Rotating the knob causes the second connector 222 to unfold between the elastic member 22 and the rotating shaft 232, reducing the tensile length of the elastic member 22 between the horizontal shaft 21 and the rotating shaft 232. This reduces the tension of the elastic member 22 on the horizontal shaft 21, thereby reducing the pulling force required by the user to pull the handheld wrapper for packing. This reduces the tension on the wrapping film, further reducing its tensile length and preventing the wrapping film from becoming brittle and easily breaking due to low winter temperatures, thus improving packing efficiency. Therefore, this structure allows adjustment of the tensile length of the elastic member 22 between the horizontal shaft 21 and the rotating shaft 232, thereby adjusting the pulling force required by the user to pull the handheld wrapper for packing. This adjusts the tensile strength of the wrapping film, allowing the handheld wrapper to adapt to the tensile strength of the wrapping film at different temperatures, meeting the user's packing needs at various temperatures and improving packing efficiency.

[0058] The second connector 222 can be a flexible component such as a nylon rope, cord, or steel wire rope, and there are no restrictions on its use.

[0059] In addition, the connection between one end of the elastic element 22 and the horizontal shaft 21 via the first connector 221 can increase the connection strength between the elastic element 22 and the horizontal shaft 21, prevent the elastic element 22 from detaching from the horizontal shaft 21 and causing damage to the tension structure 2, and improve the structural stability of the tension structure 2.

[0060] Among them, such as Figure 5 In the specific embodiment shown, the first connector 221 can be a U-shaped connector. Specifically, the bottom wall of the U-shaped connector is connected to the body 223 of the elastic member 22, and the two side walls are provided with coaxial through holes, which are fitted onto the horizontal shaft 21, allowing the horizontal shaft 21 to rotate within the through holes. This prevents the elastic member 22 from winding around the horizontal shaft 21 during packaging, thus avoiding damage to the tension structure 2 and improving the stability of the tension structure 2. Of course, the first connector 221 can also be other connecting components that can play a connecting role, and there are no limitations on this.

[0061] In addition, such as Figure 1 and Figure 4In the specific embodiment described, the body 223 of the elastic element 22 can be a spring. Of course, the elastic element 22 can also be an elastic component such as an elastic rope, and there is no limitation here.

[0062] In another embodiment, the sidewall 113 of the second cavity 112 is provided with a first snap-fit ​​position and a second snap-fit ​​position in sequence along the vertical direction X. The elastic member 22 includes a first connector 221 and a body 223. One end of the body 223 is connected to the horizontal axis 21 through the first connector 221, and the other end is connected to the fixing member 23. The fixing member 23 can be snapped and fixed with the first snap-fit ​​position and the second snap-fit ​​position respectively.

[0063] In this embodiment, the main body 223 is directly connected to the fixing member 23. By pushing the fixing member 23 on the side wall of the mounting part to engage with the first or second engagement position, the stretching length of the main body 223 of the elastic member 22 between the horizontal axis 21 and the fixing member 23 can be adjusted. This structure is simple, easy to operate, and allows users to easily observe the engagement position of the fixing member 23, making it easier for users to judge the adjustment length of the elastic member 22. This avoids the risk of stretching film breakage due to untimely adjustment, saves stretching film usage, and improves packaging efficiency.

[0064] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the horizontal axis 21 is provided with a snap-fit ​​part 313, and the side wall 113 of the mounting part 11 is provided with a snap-fit ​​mating part 114. In the locked state, the snap-fit ​​part 313 snaps into the snap-fit ​​mating part 114.

[0065] In this embodiment, the horizontal shaft 21 is engaged with the side wall 113 of the mounting part 11 through the snap-fit ​​part 313 and the connectable mating part 114, so that the hand-held winding device is in a locked state, which reduces the complexity of the structure, has low cost, is simple to manufacture, is easy to disassemble and assemble, and saves production and manufacturing costs.

[0066] Specifically, such as Figures 1 to 4 As shown, the snap-fit ​​part 114 includes a snap-fit ​​groove 114a and a circular groove 114b that are interconnected; in the locked state, the snap-fit ​​part 313 snaps into the snap-fit ​​groove 114a; in the unlocked state, the snap-fit ​​part 313 can move along the snap-fit ​​groove 114a to the circular groove 114b and can rotate within the circular groove 114b.

[0067] In this embodiment, as Figure 1 and Figure 2 In the locked state, the locking part 313 engages with the locking groove 114a, which restricts the rotation of the locking part 313 in the locking groove 114a, thereby restricting the rotation of the horizontal shaft 21 in the first cavity 111, and thus restricting the rotation of the fixed cylinder 3. This prevents the stretch film from unwinding from the handheld wrapper in the locked state, preventing stretch film waste and saving costs; in such cases... Figure 3 and Figure 4 In the unlocked state, the locking part 313 is pulled into the circular groove 114b. Since the size of the circular groove 114b is larger than the size of the locking part 313 when rotating, the locking part 313 can rotate within the circular groove 114b under the action of external force. This allows the horizontal shaft 21 to rotate within the first cavity 111, thereby allowing the fixed cylinder 3 to rotate so that the stretch film can be wrapped out from the hand-held wrapper for packaging. This locking structure is simple, not easily damaged, and easy to process and manufacture, which can reduce production and manufacturing costs and facilitate mass production.

[0068] Specifically, the cross-sectional shape of the snap-fit ​​part 313 is one of square, hexagonal, or gear-shaped.

[0069] In this embodiment, when the cross-section of the snap-fit ​​part 313 is one of square, hexagonal, or gear-shaped, the snap-fit ​​part 313 is one of square column, hexagonal column, or gear-shaped column. When this structure is matched with the square, hexagonal, or gear-shaped snap-fit ​​groove 114a, it is easy to snap-fit, making the snap-fit ​​structure easy to realize and easy to process and manufacture, thus reducing manufacturing costs.

[0070] Among them, such as Figure 2 and Figure 4 In the specific embodiment shown, the cross-section of the snap-fit ​​part 313 is square and the snap-fit ​​part 313 is a cubic block structure. The snap-fit ​​groove 114a is a square structure that matches it. This structure can improve the restriction of the snap-fit ​​part 313 by the snap-fit ​​groove 114a. Of course, the cross-section of the snap-fit ​​part 313 can also be other polygonal structures, and the snap-fit ​​groove 114a can also be other shapes that match the snap-fit ​​part 313. There are no restrictions here.

[0071] In one specific embodiment, such as Figure 5 As shown, the horizontal axis 21 also includes a first connecting shaft 311 and a second connecting shaft 312. The cross-sectional dimensions of the second connecting shaft 312 are smaller than those of the first connecting shaft 311 and the snap-fit ​​part 313. One end of the first connecting shaft 311 is connected to the fixed cylinder 3, and the other end is connected to the second connecting shaft 312. The elastic element 22 is sleeved on the second connecting shaft 312. One end of the snap-fit ​​part 313 is connected to the second connecting shaft 312, and the other end is engaged with the snap-fit ​​mating part 114.

[0072] In this embodiment, as Figure 5As shown, the horizontal shaft 21 consists of three parts, each with a different structure, facilitating the positioning of components during assembly and improving production efficiency. The first connecting shaft 311 and the second connecting shaft 312 are located within the first cavity 111, and the locking part 313 is located within the locking mating part 114. This facilitates the rotation of the horizontal shaft 21 during packaging, preventing jamming within the first cavity 111 and improving the stability of the hand-held wrapper. Furthermore, the cross-sectional dimension of the second connecting shaft 312 is smaller than that of the first connecting shaft 311 and the locking part 313, preventing the elastic element 22 fitted onto the second connecting shaft 312 from moving to the first connecting shaft 311 and the locking part 313 during packaging, thus preventing displacement of the elastic element within the second cavity 112 and improving the structural stability of the tension structure 2.

[0073] In one specific embodiment, such as Figures 1 to 4 As shown, the fixed cylinder 3 is provided with a plurality of positioning protrusions 31, which are spaced apart along the outer periphery of the fixed cylinder 3.

[0074] In this embodiment, when the film tube of the stretch film is installed on the fixed cylinder 3, the multiple positioning protrusions 31 on the fixed cylinder 3 can restrict the film tube of the stretch film from rotating on the fixed cylinder 3, so that the film tube and the fixed cylinder 3 rotate synchronously during the packaging process. This can prevent the film tube from slipping on the fixed cylinder 3 when the user stretches the stretch film during the packaging process, which would cause the stretch film to fail to wrap smoothly or break, thus improving the packaging efficiency.

[0075] Among them, such as Figures 1 to 4 In the specific embodiment shown, the fixed cylinder 3 is provided with four positioning protrusions 31 evenly spaced along its outer periphery. Of course, the number of positioning protrusions 31 can also be six, eight, etc., and there is no limitation here.

[0076] Specifically, the positioning protrusion 31 is one of a cone, a triangular pyramid, or a square pyramid.

[0077] In this embodiment, when the positioning protrusion 31 is one of a cone, a triangular pyramid, or a square pyramid, it has a raised tip, which can effectively fix the film tube of the wound film, and the structure is simple and easy to manufacture. Of course, the positioning protrusion 31 can also be other structures with protrusions, such as triangular prisms or square prisms, etc., and there is no limitation here.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A handheld winder, characterized in that, include: A frame (1), the frame (1) including a mounting part (11); A tension structure (2) is mounted on the mounting part (11); A fixed cylinder (3) is connected to the tension structure (2); The tensioning structure (2) can drive the fixed cylinder (3) to move downward in the vertical direction (X) relative to the frame (1) so that the handheld winder is in a locked state; the fixed cylinder (3) can drive the tensioning structure (2) to move upward in the vertical direction (X) relative to the frame (1) so that the handheld winder is in an unlocked state, and the fixed cylinder (3) can rotate in the unlocked state. The mounting part (11) includes a first cavity (111) and a second cavity (112) that are interconnected, and the second cavity (112) is bent relative to the first cavity (111); The tension structure (2) includes a horizontal shaft (21), an elastic element (22), and a fixing element (23); The horizontal shaft (21) is installed in the first cavity (111), and the fixed cylinder (3) is sleeved on the horizontal shaft (21); The elastic element (22) is installed in the second cavity (112). One end of the elastic element (22) is connected to the horizontal shaft (21), and the other end is connected to the fixing element (23). The fixing element (23) is installed on the side wall (113) of the mounting part (11). The horizontal axis (21) can move in the vertical direction (X) within the first cavity (111) to put the handheld wrapper in a locked or unlocked state; The horizontal shaft (21) is provided with a snap-fit ​​part (313), and the side wall (113) of the mounting part (11) is provided with a snap-fit ​​mating part (114); In the locked state, the latching part (313) latches with the latching mating part (114).

2. The handheld winder according to claim 1, characterized in that, The fixing member (23) includes a knob (231) and a rotating shaft (232), and the elastic member (22) includes a first connecting member (221), a second connecting member (222), and a body (223); One end of the main body (223) is connected to the horizontal axis (21) via the first connector (221), and the other end is connected to the rotating shaft (232) via the second connector (222). Rotating the knob (231) can cause the second connector (222) to be rolled up onto the rotating shaft (232) or unfolded.

3. The handheld winding device according to claim 1, characterized in that, The side wall (113) of the second cavity (112) is provided with a first snap-fit ​​position and a second snap-fit ​​position in sequence along the vertical direction (X); The elastic element (22) includes a first connector (221) and a body (223). One end of the body (223) is connected to the horizontal axis (21) through the first connector (221), and the other end is connected to the fixing element (23). The fastener (23) can be fastened to the first snap-fit ​​position and the second snap-fit ​​position respectively.

4. The handheld winder according to claim 1, characterized in that, The snap-fit ​​part (114) includes a snap-fit ​​groove (114a) and a circular groove (114b) that are interconnected; In the locked state, the latching part (313) latches with the latching groove (114a); In the unlocked state, the latching part (313) can move along the latching groove (114a) to the circular groove (114b) and can rotate within the circular groove (114b).

5. The handheld winding device according to claim 4, characterized in that, The horizontal axis (21) also includes a first connecting shaft (311) and a second connecting shaft (312), wherein the cross-sectional dimension of the second connecting shaft (312) is smaller than that of the first connecting shaft (311) and the snap-fit ​​part (313); One end of the first connecting shaft (311) is connected to the fixed cylinder (3), and the other end is connected to the second connecting shaft (312); The elastic element (22) is sleeved on the second connecting shaft (312); One end of the snap-fit ​​part (313) is connected to the second connecting shaft (312), and the other end is engaged with the snap-fit ​​mating part (114).

6. The handheld winding device according to claim 5, characterized in that, The cross-sectional shape of the snap-fit ​​part (313) is one of square, hexagonal, or gear-shaped.

7. The handheld winder according to any one of claims 1 to 6, characterized in that, The fixed cylinder (3) is provided with a plurality of positioning protrusions (31), which are spaced apart along the outer periphery of the fixed cylinder (3).

8. The handheld winding device according to claim 7, characterized in that, The positioning protrusion (31) is one of a cone, a triangular pyramid, or a square pyramid.

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