A packaging machine cable supply control device

Abstract

This utility model discloses a cable supply control device for a packaging machine, relating to the field of cigarette packaging machine technology. The cable supply control device includes: a cable swing arm; a first shaft passing through the cable swing arm and capable of driving the cable swing arm to rotate; a guide assembly installed on the cable swing arm; a drive assembly for controlling cable release; a magnetic sensing assembly installed at the end of the first shaft; the magnetic sensing assembly includes a second shaft, including a first end and a second end; the first end is connected to the end of the first shaft; a magnetic element is installed at the second end; a sensing assembly and the magnetic element are spaced apart; a control assembly is coupled to the sensing assembly and the drive assembly; the sensing assembly can detect changes in the position of the magnetic element and send a first electrical signal to the control assembly; the control assembly can send a second electrical signal to the drive assembly based on the first electrical signal to control the operating state of the drive assembly. This cable supply control device is used to precisely control the release of the cable, ensuring a uniform and stable release speed.

Description

Technical Field

[0001] This utility model relates to the field of cigarette packaging machine technology, and in particular to a packaging machine pull-line supply control device. Background Technology

[0002] The ZB48A packaging machine (ZB48A hard-pack and hard-strip packaging unit) is a high-speed piece of equipment used in domestic cigarette production for hard-pack and hard-strip packaging. Its main function is to process pre-formed cigarettes (produced by the ZJ116A cigarette-making unit) through operations such as cigarette pack forming, sealing, labeling, and boxing, ultimately creating a complete finished cigarette pack. During the cigarette packing process, a pull line (also known as a "hanging line") is installed inside the transparent paper packaging of the cigarette pack. This is used to facilitate quick opening of the packaging by the user, or for printing anti-counterfeiting labels or brand logos. The pull line control system in existing packaging machines determines the release speed of the pull line by identifying the position of the pull line swing arm. That is, when the pull line is released excessively, the pull line swing arm will swing downwards, while when the pull line is released insufficiently, the pull line swing arm will rise.

[0003] The current method for identifying the position of the wire-operated swing arm is as follows: an eccentric disk is installed on the wire-operated swing arm, and a linear analog sensor is placed directly opposite the eccentric disk. The position of the eccentric disk is detected by the linear analog sensor to indirectly detect and identify the position of the wire-operated swing arm. The position of the wire-operated swing arm is used to determine whether the wire release speed is appropriate, and then the wire release speed is adjusted by the wire motor to form a control closed loop.

[0004] However, due to the shape and installation position of the eccentric disc, the output analog quantity is not linear, which causes the unwinding speed of the wire drawing motor to be non-uniform. This leads to excessive shaking of the wire drawing arm, causing problems such as wire jumping out of the groove and breaking. Utility Model Content

[0005] The purpose of this invention is to provide a packaging machine pull wire supply control device for precisely controlling the release of the pull wire, so that the release speed of the pull wire is uniform and stable.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a packaging machine drawstring supply control device, which includes: a drawstring swing arm extending along a first direction; a first shaft extending along a second direction; the first shaft passes through the drawstring swing arm and can drive the drawstring swing arm to rotate around the axis of the first shaft; the second direction is set at an angle to the first direction; a guide assembly installed on the drawstring swing arm; a drive assembly for controlling the release of the drawstring; and a magnetic sensing assembly installed at the end of the first shaft. The magnetic sensing assembly includes: a second shaft extending along the second direction, including a first end and a second end; the first end is connected to the end of the first shaft; a magnetic element installed at the second end; a sensing assembly spaced apart from the magnetic element in the second direction; and a control assembly coupled to the sensing assembly and the drive assembly. The sensing assembly can detect changes in the position of the magnetic element and send a first electrical signal to the control assembly; the control assembly can send a second electrical signal to the drive assembly according to the first electrical signal to control the operating state of the drive assembly.

[0008] In some embodiments, the magnetic element has a disk-shaped structure or a ring-shaped structure; the center line of the magnetic element coincides with the axis of the second shaft, and the axis of the second shaft coincides with the axis of the first shaft.

[0009] In some embodiments, the sensing component includes four magnetoresistive elements arranged in a square array and a fixing layer covering the magnetoresistive elements; the four magnetoresistive elements form a magnetoresistive bridge, and the center point of the magnetoresistive bridge is located on the center line of the magnetic element.

[0010] In some embodiments, the guiding assembly includes a guide member; the guide member extends along the second direction and is rotatably connected to the pull-wire swing arm; the guide member is rotatable along its own axis.

[0011] In some embodiments, the number of guide members is multiple; the multiple guide members are spaced apart along the first direction on the pull-wire swing arm.

[0012] In some embodiments, the pull-wire swing arm has a plurality of strip-shaped holes; the strip-shaped holes extend along the first direction; the plurality of strip-shaped holes and the plurality of guide members are arranged alternately along the first direction.

[0013] In some embodiments, the guide includes a connecting portion and a guiding portion; the connecting portion is rotatably connected to the pull-wire swing arm, and the guiding portion is fixedly connected to the connecting portion; or, the connecting portion is fixedly connected to the pull-wire swing arm, and the guiding portion is rotatably connected to the connecting portion.

[0014] In some embodiments, the guide portion is provided with a guide sub-portion and two limiting sub-portions; the guide sub-portion is located between the two limiting sub-portions.

[0015] In some embodiments, the connection between the guide sub-part and the two limiting sub-parts is provided with an arc transition.

[0016] In some embodiments, the pull-wire swing arm includes a swing arm body and a connecting end; the guide assembly is mounted on the swing arm body; the connecting end has a connecting hole along the second direction, and the second shaft passes through the connecting hole.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a packaging machine drawstring supply control device. It includes a first shaft passing through a drawstring swing arm and capable of driving the swing arm to rotate; a rotation guide assembly mounted on the drawstring swing arm; a drive assembly controlling drawstring release; a magnetic sensing assembly installed at the end of the first shaft; the magnetic sensing assembly being structured as a second shaft extending along a second direction, including a first end and a second end; the first end being connected to the end of the first shaft; a magnetic component installed at the second end; a sensing component spaced apart from the magnetic component along the second direction; and a control component coupled to the sensing component and the drive assembly. The sensing component can detect changes in the position of the magnetic component and send a first electrical signal to the control component. The control component can transmit a second electrical signal to the drive assembly based on the first electrical signal to control the operating state of the drive assembly. This allows for the indirect determination of the cable release speed by detecting the position of the cable release arm (excessive cable release causes the cable release arm to swing downwards, while insufficient release causes it to rise). The position of the cable release arm can be indirectly detected by using a magnetic sensing assembly mounted on the end of the first shaft to detect the position of the first shaft (both downward and upward movement of the cable release arm will change the position of the first shaft). In this process of using the magnetic sensing assembly to detect the position of the first shaft, the high accuracy and linear, uniform output signal of the assembly ensure timely and accurate detection. Furthermore, the linear and uniform signal output of the magnetic sensing assembly ensures that the changes in the operating state of the drive components in the entire cable supply system are also linear and uniform (i.e., the speed changes of the drive components are linear and uniform), thus making the cable release speed uniform and stable. This prevents unstable actions during cable release by the drive components, which could cause the cable to jump or break, improving the stability of the cable supply. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a packaging machine drawer supply control device according to a specific embodiment of the present invention;

[0020] Figure 2 This is a structural diagram of a magnetic sensing assembly provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a structural diagram of a sensing component provided in a specific embodiment of this utility model;

[0022] Figure 4 This is a structural diagram of a guide component provided in a specific embodiment of this utility model.

[0023] In the picture:

[0024] 1. Wire-operated swing arm; 11. Swing arm body; 111. Strip-shaped perforation; 12. Connecting end; 2. First shaft; 3. Guide assembly; 31. Guide component; 311. Connecting part; 312. Guide part; 3121. Guide sub-part; 3122. Limiting sub-part; 4. Magnetic sensing assembly; 41. Second shaft; 411. First end; 412. Second end; 42. Magnetic component; 43. Sensing assembly; 431. Magnetoresistive element; 44. Control assembly; 45. Housing;

[0025] X1, first direction; X2, second direction. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] like Figure 1 As shown, this embodiment provides a packaging machine wire supply control device, which includes: a wire pulling arm 1, a first shaft 2, a guide assembly 3, a drive assembly, and a magnetic sensing assembly 4.

[0031] The aforementioned pull-wire swing arm 1 extends along a first direction X1. The aforementioned first shaft 2 extends along a second direction X2 and passes through the pull-wire swing arm 1. Furthermore, the first shaft 2 can drive the pull-wire swing arm 1 to rotate about the axis of the first shaft 2. Here, the second direction X2 is set at an angle to the first direction X1, and the angle is, for example, 90°. The aforementioned guide assembly 3 is mounted on the pull-wire swing arm 1. The pull wire can be wound around the guide assembly 3.

[0032] For example, such as Figure 1 As shown, the aforementioned pull-wire swing arm 1 includes a swing arm body 11 and a connecting end 12. The guide assembly 3 is installed on the swing arm body 11 of the pull-wire swing arm 1. A connecting hole is provided on the connecting end 12 of the pull-wire swing arm 1 along the second direction X2, and the aforementioned second shaft 41 passes through the connecting hole. The connection method between the second shaft 41 and the connecting hole is, for example, that keyways are provided on the inner sidewalls of both the second shaft 41 and the connecting hole, and the second shaft 41 and the connecting hole are connected by a key.

[0033] The aforementioned drive component is used to control the release of the pull cord. Here, the drive component is, for example, a rotary motor. The method by which the drive component controls the release of the pull cord can be set with reference to the existing pull cord control method in the ZB48A packaging machine. The improvement point of this embodiment is not in this respect, so it will not be described in detail here.

[0034] Combination Figure 1 , Figure 2 As shown, the magnetic sensing assembly 4 is mounted on the end of the first shaft 2. The magnetic sensing assembly 4 includes: a second shaft 41, a magnetic component 42, a sensing component 43, and a control... The second shaft 41 extends along a second direction X2 and includes a first end 411 and a second end 412. The first end 411 of the second shaft 41 is connected to the end of the first shaft 2, for example, via a coupling. The magnetic element 42 is mounted at the second end 412 of the second shaft 41, that is, at the end of the second shaft 41 away from the first shaft 2. The sensing component 43 is spaced apart from the magnetic element 42 along the second direction X2. The control component 44 is coupled to the sensing component 43 and the drive component, and this coupling includes electrical connection and signal connection.

[0035] The aforementioned sensing component 43 can detect position changes in the magnetic component 42 and send a first electrical signal to the control component 44. It is easy to understand that since the magnetic component 42 is mounted on the second end 412 of the second shaft 41, and the first end 411 of the second shaft 41 is connected to the end of the first shaft 2, a change in the position (angle) of the first shaft 2 will synchronously change the position (angle) of the magnetic component 42. Therefore, detecting the position change of the magnetic component 42 using the sensing component 43 is also indirectly detecting the position change of the first shaft 2. Furthermore, the first electrical signal here is the position (angle) information of the magnetic component 42, which is also the position (angle) information of the first shaft 2.

[0036] The control component 44 can transmit a second electrical signal to the drive component based on the first electrical signal from the sensing component 43, thereby controlling the operating state of the drive component. It is easy to understand that the second electrical signal here is a signal that controls the speed of the drive component to increase or decrease. It is also easy to understand that the control component 44 includes multiple modules such as a signal processing unit (e.g., a differential amplifier, analog-to-digital converter, angle solver, etc.), a control logic unit (e.g., an SPI interface controller), a signal communication unit (e.g., an SPI communication interface), and a power management unit (e.g., an LDO regulator, etc.). The improvement in this embodiment does not lie in the structure of the control component 44, therefore it will not be described in detail here.

[0037] Therefore, the packaging machine drawstring supply control device provided in this embodiment includes a first shaft 2 that passes through the drawstring swing arm 1 and can drive the drawstring swing arm 1 to rotate, a rotation guide assembly 3 installed on the drawstring swing arm 1, a drive assembly for controlling the release of the drawstring, a magnetic sensing assembly 4 installed at the end of the first shaft 2, and the magnetic sensing assembly 4 is configured as a second shaft 41 extending along the second direction X2, including a first end 411 and a second end 412, connecting the first end 411 to the end of the first shaft 2; a magnetic element 42 installed at the second end 412; a sensing assembly 43 spaced apart from the magnetic element 42 along the second direction X2; and a control assembly 44 coupled to the sensing assembly 43 and the drive assembly. The sensing assembly 43 can detect the position change of the magnetic element 42 and send a first electrical signal to the control assembly 44. The control assembly 44 can send a second electrical signal to the drive assembly according to the first electrical signal to control the operating state of the drive assembly. This allows the position of the wire release speed to be indirectly determined by detecting the position of the wire release arm 1 (when the wire release is excessive, the wire release arm 1 will swing down, and when the wire release is insufficient, the wire release arm 1 will rise). The position of the wire release arm 1 can be indirectly detected by detecting the position of the first shaft 2 by the magnetic sensing assembly 4 installed at the end of the first shaft 2 (both the downward swing and the upward swing of the wire release arm 1 will cause the position of the first shaft 2 to change). In the process of using the magnetic sensing assembly 4 to detect the position of the first shaft 2, since the magnetic sensing assembly 4 is installed at the end of the first shaft 2 and has high detection accuracy, the output signal is linear and uniform. This ensures that the detection of the position of the first shaft 2 can be timely and accurate. Furthermore, the linear and uniform signal output by the magnetic sensing assembly 4 ensures that the change in the operating state of the drive component in the entire wire supply system is also linear and uniform (i.e., the speed change of the drive component is linear and uniform). This makes the wire release speed uniform and stable, avoiding unstable actions when the drive component controls the wire release, which could cause the wire to jump or break, thus improving the stability of the wire supply.

[0038] It is not difficult to understand that, such as Figure 2 As shown, in order to facilitate the installation of each component in the magnetic sensing assembly 4, the magnetic sensing assembly 4 also includes a housing 45. The second end 412 of the second shaft 41 is disposed inside the housing 45. The magnetic component 42, the sensing component 43 and the control component 44 are all disposed inside the housing 45.

[0039] In some embodiments, the magnetic element 42 is in the form of a disk or a ring. The magnetic element 42 is, for example, a magnet. It is readily understood that the N and S poles of the magnetic element 42 are symmetrically arranged, that is, the N and S poles of the magnetic element 42 each occupy half of the disk or ring structure. The centerline of the magnetic element 42 coincides with the axis of the second axis 41, and the axis of the second axis 41 coincides with the axis of the first axis 2. This arrangement ensures that the centerline of the magnetic element 42 and the axis of the first axis 2 coincide, so that when the position of the first axis 2 changes, that is, when the first axis 2 rotates around its own axis, its position change is accurately reflected in the magnetic element 42, improving the accuracy of the sensing component 43 in detecting position changes of the magnetic element 42. Furthermore, setting the magnetic element 42 to a disk or ring structure makes the magnetic field around the magnetic element 42 more uniform, further improving the accuracy of the sensing component 43 in detecting position changes of the magnetic element 42.

[0040] In some embodiments, such as Figure 3 As shown, the aforementioned sensing component 43 includes four magnetoresistive elements 431 arranged in a square array and a fixing layer covering the magnetoresistive elements 431. The four magnetoresistive elements 431 form a magnetoresistive bridge, with the center point of the bridge located on the center line of the magnetic component 42. The magnetoresistive bridge can change its resistance value due to changes in the magnetic field, thereby outputting a differential voltage signal, which can be used for non-contact detection of physical quantities such as angle, current, and position. The magnetoresistive elements 431 can be anisotropic magnetoresistive elements, giant magnetoresistive elements, or tunneling magnetoresistive elements. The fixing layer covers the magnetoresistive elements 431 and uses an antiferromagnetic material (such as an iron-rhodium alloy) to lock the reference magnetization direction. The principle of the magnetoresistive bridge's function is prior art and will not be described in detail here. With the above configuration, the sensing component 43 can detect the position of the magnetic component 42, resulting in a simple structure and convenient use.

[0041] In some embodiments, such as Figure 1 As shown, the guide assembly 3 includes a guide member 31. This guide member 31 extends along a second direction and is rotatably connected to the cable pull arm 1. The guide member 31 is capable of rotating along its own axis. This arrangement provides support for the cable, and after the cable is wound onto the guide assembly 3, the rotation of the guide member 31 itself allows the cable to move more smoothly, preventing cable breakage and improving the practicality of the packaging machine cable supply control device.

[0042] In some embodiments, such as Figure 1As shown, there are multiple guide members 31, which are spaced apart along the first direction X1 on the cable pull arm 1. Specifically, the multiple guide members 31 are spaced apart along the first direction X1 on the main body 11 of the cable pull arm 1. This arrangement allows the cable to be wound around the multiple guide members 31, providing more support for the cable and enabling smoother cable movement, preventing cable breakage and further improving the practicality of the cable supply control device for the packaging machine.

[0043] In some embodiments, such as Figure 1 As shown, the aforementioned pull-wire swing arm 1 has multiple strip-shaped holes 111, which extend along the first direction X1, that is, the extending direction of the strip-shaped holes 111 is the same as the extending direction of the pull-wire swing arm 1. The multiple strip-shaped holes 111 and multiple guide members 31 are arranged alternately along the first direction X1. Specifically, with... Figure 1 Taking the shown perspective as an example, the pull-wire swing arm 1 is arranged from left to right as follows: guide member 31, strip-shaped hole 111, guide member 31, strip-shaped hole 111, guide member 31, strip-shaped hole 111. This arrangement can reduce the weight of the pull-wire swing arm 1 to a certain extent, making its action response faster and thus more accurately reflecting the release speed of the pull wire wound on the guide member 31 of the pull-wire swing arm 1.

[0044] In some embodiments, such as Figure 4 As shown, the guide member 31 includes a connecting part 311 and a guide part 312. The connecting part 311 is rotatably connected to the cable swing arm 1, and the guide part 312 is fixedly connected to the connecting part 311. The rotatable connection between the connecting part 311 and the cable swing arm 1 is achieved, for example, by providing a bearing mounting hole on the cable swing arm 1, housing a bearing within the bearing mounting hole, and mounting the connecting part 311 onto the inner ring of the bearing. The fixed connection between the guide part 312 and the connecting part 311 is achieved, for example, by welding or as a single integral structure. Alternatively, the connecting part 311 is fixedly connected to the cable swing arm 1, and the guide part 312 is rotatably connected to the connecting part 311. Here, the connection between the connecting part 311 and the cable swing arm 1 is, for example, welded, and the connection between the guide part 312 and the connecting part 311 is via a bearing. With this configuration, the pull wire can be wound around the guide portion 312 of the guide member 31. By utilizing the rotation of the guide portion 312, the pull wire can move more smoothly, avoiding breakage. The structure is simple and easy to process and manufacture.

[0045] In some embodiments, such as Figure 4As shown, the guide section 312 is provided with a guide subsection 3121 and two limiting subsections 3122, wherein the guide subsection 3121 is located between the two limiting subsections 3122. This arrangement allows the pull cord to be wound around the guide section, and the limiting subsections 3122 on both sides of the guide subsection 3121 can limit the pull cord, preventing it from falling off the guide section 31, thus improving the reliability of the packaging machine pull cord supply control device during use.

[0046] In some embodiments, such as Figure 4 As shown, the connection between the guide sub-part 3121 and the two limiting sub-parts 3122 is a rounded transition. This design ensures that even if the pull cable deviates during its movement after being wound around the guide sub-part 3121, it will not rub against the sidewall of the limiting sub-parts 3122, preventing wear. Furthermore, the rounded transition at the connection between the guide sub-part 3121 and the two limiting sub-parts 3122 allows for self-correction of the pull cable's position, improving the stability of the pull cable's position during movement.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A packaging machine thread supply control device, characterized by, include: A cable-operated swing arm (1) extends along a first direction (X1); A first shaft (2) extends along a second direction (X2); the first shaft (2) passes through the pull wire swing arm (1) and can drive the pull wire swing arm (1) to rotate around the axis of the first shaft (2); the second direction (X2) is set at an angle to the first direction (X1); Guide assembly (3) is installed on the pull wire swing arm (1); The drive component is used to control the release of the pull cable; A magnetic sensing assembly (4) is installed at the end of the first shaft (2); The magnetic sensing assembly (4) includes: a second shaft (41) extending along the second direction (X2) and including a first end (411) and a second end (412); the first end (411) is connected to the end of the first shaft (2); a magnetic element (42) mounted on the second end (412); a sensing component (43) spaced apart from the magnetic element (42) in the second direction (X2); and a control component (44) coupled to the sensing component (43) and the driving component. The sensing component (43) can detect the position change of the magnetic component (42) and send a first electrical signal to the control component (44); the control component (44) can send a second electrical signal to the driving component according to the first electrical signal to control the operating state of the driving component.

2. The packaging machine thread supply control device of claim 1, wherein, The magnetic component (42) has a disk-shaped structure or a ring-shaped structure; the center line of the magnetic component (42) is arranged to coincide with the axis of the second shaft (41), and the axis of the second shaft (41) is arranged to coincide with the axis of the first shaft (2).

3. The packaging machine thread supply control device of claim 2, wherein, The sensing component (43) includes four magnetoresistive elements (431) arranged in a square array and a fixing layer covering the magnetoresistive elements (431); the four magnetoresistive elements (431) form a magnetoresistive bridge, and the center point of the magnetoresistive bridge is located on the center line of the magnetic component (42).

4. The packaging machine thread supply control device of claim 1, wherein, The guide assembly (3) includes a guide member (31); the guide member (31) extends along the second direction and is rotatably connected to the pull wire swing arm (1); the guide member (31) is rotatable along its own axis.

5. The packaging machine cable supply control device according to claim 4, characterized in that, The number of guide members (31) is multiple; the multiple guide members (31) are spaced apart along the first direction (X1) on the pull wire swing arm (1).

6. The packaging machine thread supply control device of claim 5, wherein, The pull-wire swing arm (1) has multiple strip-shaped holes (111); the strip-shaped holes (111) extend along the first direction (X1); the multiple strip-shaped holes (111) and the multiple guide members (31) are arranged alternately along the first direction (X1).

7. The packaging machine thread supply control device of claim 4, wherein, The guide member (31) includes a connecting part (311) and a guide part (312); the connecting part (311) is rotatably connected to the pull wire swing arm (1), and the guide part (312) is fixedly connected to the connecting part (311); or, the connecting part (311) is fixedly connected to the pull wire swing arm (1), and the guide part (312) is rotatably connected to the connecting part (311).

8. The packaging machine thread supply control device of claim 7, wherein, The guide portion (312) is provided with a guide sub-portion (3121) and two limiting sub-portions (3122); the guide sub-portion (3121) is located between the two limiting sub-portions (3122).

9. The packaging machine thread supply control device of claim 8, wherein, The connection between the guide sub-part (3121) and the two limiting sub-parts (3122) is provided with an arc transition.

10. The packaging machine thread supply control device according to any one of claims 1 to 9, characterized in that The pull-wire swing arm (1) includes a swing arm body (11) and a connecting end (12); the guide assembly (3) is installed on the swing arm body (11); the connecting end (12) has a connecting hole along the second direction (X2), and the second shaft (41) passes through the connecting hole.

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