Flexible thread supply device and sewing apparatus

Abstract

This utility model discloses a flexible thread feeding device and sewing equipment, including a thread take-up crank, a thread take-up connecting rod, and a thread take-up lever. The thread take-up lever includes a thread take-up arm and a thread passage hole. One end of the thread take-up connecting rod is hinged to the thread take-up lever, and the other end of the thread take-up connecting rod is hinged to an adjustment component. The adjustment component includes an adjustment crank and a drive source. One end of the adjustment crank is hinged to the drive source, and the other end of the adjustment crank is hinged to the thread take-up connecting rod. The adjustment component moves the thread take-up connecting rod and the hinged end of the adjustment crank to a target position by adjusting the adjustment crank, so that the thread passage hole of the thread take-up lever performs a target stroke. The sewing equipment includes a flexible thread feeding device, which is equipped with an electronic control system for controlling the adjustment component.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewing equipment thread supply devices, specifically relating to a flexible thread supply device and sewing equipment. Background Technology

[0002] In existing sewing machines, the thread take-up mechanism is usually a four-bar linkage mechanism. The thread take-up mechanism is located inside the machine, and a long groove is opened on the side of the machine casing. The thread take-up lever extends out of the machine casing from the long groove and can move up and down along the long groove.

[0003] like Figure 2 , 3 4. In the four-bar linkage thread take-up mechanism, the thread take-up crank I500 rotates at a constant speed with the main shaft, thereby driving the thread take-up lever I100 to reciprocate up and down. The thread passes sequentially through the right thread hook 300, the thread guide hole E, and the left thread hook 200. During operation, the spatial position of the thread guide hole E changes continuously, causing changes in the thread supply and demand of the take-up mechanism. However, in the existing structural design, the length of each component is a fixed value, and the thread supply can only be adjusted within a small range by finely adjusting the position of the right thread hook 300. This makes it difficult to match diverse sewing scenarios, such as the need to change to a rotary hook with a different radius, or to sew extremely thick fabrics with large stitch lengths, resulting in poor stitches or even thread breakage.

[0004] This adjustment method has the following drawbacks: it can only be adjusted statically and cannot be combined with automation to achieve quantitative adjustment; the adjustment amount cannot meet the quantitative control requirements.

[0005] Therefore, there is a lack of mature technology to enable the thread supply of flatbed sewing machines to be adjusted accordingly for various sewing scenarios. In the existing methods of adjusting the thread supply of sewing machines, apart from fine-tuning the position of the right thread hook 3, the thread supply is generally adjusted by rotating the angle of the take-up lever pin. However, this adjustment method not only requires removing the end cap for manual adjustment, which involves many steps and takes a long time, but also requires adding a new positioning plane to the take-up lever pin. Since the number of machined positioning planes is extremely limited by the strength and rigidity of the pin structure, the amplitude and shape of the adjustable thread supply curve are also very limited. Utility Model Content

[0006] This utility model aims to solve the technical defects of existing sewing equipment where the thread supply adjustment cannot be automated and it is difficult to combine with digital and other automatic adjustment technologies. It provides a new thread take-up mechanism that is more convenient to adjust, has more degrees of freedom, and is more precise. It can realize dynamic and static adjustment, not only satisfying static adjustment, but also realizing dynamic adjustment of the required thread supply based on specified parameters during the sewing process.

[0007] Moreover, it is more conducive to combining with automated control equipment to achieve the purpose of automated control, electronic control, or remote quantitative adjustment.

[0008] This application provides a flexible wire feeding device, including a wire lifting crank, a wire lifting connecting rod, and a wire lifting rod. The wire lifting rod includes a wire lifting arm and a wire passage hole. One end of the wire lifting connecting rod is hinged to the wire lifting rod, and the other end of the wire lifting connecting rod is hinged to an adjustment component.

[0009] The adjustment assembly includes an adjustment crank and a drive source. One end of the adjustment crank is hinged to the drive source, and the other end of the adjustment crank is hinged to the take-up rod. The adjustment assembly moves the take-up rod and the hinged end of the adjustment crank to the target position by adjusting the adjustment crank, so that the take-up rod's thread-passing hole performs the target stroke.

[0010] The technical solution provided in this application also has the following technical features:

[0011] Preferably, in one embodiment of this application, the drive source drives the adjusting crank to rotate, swing, or move, so that the hinged end of the adjusting crank and the line-fetching rod moves to the target position.

[0012] Preferably, in one embodiment of this application, the driving source is a motor.

[0013] Preferably, in one embodiment of this application, the drive source includes a motor and a lead screw sliding pair.

[0014] Preferably, in one embodiment of this application, one end of the adjusting crank is provided with a clearance portion, which is used to avoid interference with the movement.

[0015] Preferably, in one embodiment of this application, the avoidance portion includes an L-shape, and the bend is provided with smooth rounded corners.

[0016] Preferably, in one embodiment of this application, a rotating drum is provided at both ends of the adjusting crank, the rotating drum at one end of the adjusting crank is coaxially and fixedly connected to the drive source, and the rotating drum at the other end of the adjusting crank is hinged to the line-fetching connecting rod.

[0017] Preferably, in one embodiment of this application, the thread-taking crank is mounted on the main shaft, one end of the thread-taking rod is hinged to the thread-taking crank, and the other end of the thread-taking rod is hinged to the thread-taking connecting rod; the thread-taking rod is provided with an extended thread-taking arm, and the thread-taking arm has a thread-passing hole.

[0018] Preferably, in one embodiment of this application, the take-up lever is equipped with a left hook and a right hook, which are disposed on the machine housing. The machine housing is provided with a long groove, and the take-up arm extends out of the long groove.

[0019] Preferably, in one embodiment of this application, the flexible wire supply device is equipped with a fabric reading module;

[0020] The fabric reading module is equipped with a sensor to identify the fabric being processed; alternatively, the fabric reading module is equipped with a storage unit to read the fabric parameters from the production plan, thereby enabling the flexible thread supply device to execute the target thread supply quantity.

[0021] Preferably, in one embodiment of this application, a sewing device employs a flexible thread supply device, which is equipped with an electronic control system for controlling and adjusting components.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0023] 1. This application provides a structural basis for the automated and digital adjustment of thread supply. By adjusting the swing angle of the adjusting crank, the thread take-up lever completes the target stroke of the thread hole, thereby meeting the dynamic and static requirements of thread supply. That is, according to different sewing processes or fabric characteristics, the movement range of the thread take-up lever can be flexibly adjusted to improve adaptability and versatility.

[0024] 2. This application completes the adjustment of the thread supply, and can further be used in conjunction with the left and right thread hooks. By adjusting the highest or lowest point of the thread take-up hole, the tension of the upper thread and the timing of the thread return can be precisely controlled, reducing problems such as thread breakage and floating thread. This makes the thread take-up action more precise and coordinated, effectively avoiding skipped stitches and skewing caused by improper thread take-up, and improving sewing stability.

[0025] 3. The adjustment of the wire supply in this application is achieved by rotating the adjustment crank through the rotation of the motor, including clockwise and counterclockwise rotation, to complete different swing angles of the adjustment crank and thus obtain the corresponding target wire supply. The adjustment method is simple and intuitive, which makes it easy for operators to make quick fine adjustments as needed without replacing or disassembling parts, providing a feasible structural basis for digital and automated adjustment.

[0026] 4. Based on the ability to quickly adjust the thread supply, this application is applicable to sewing tasks with different thread diameters, tensions, or fabric thicknesses, improving the multi-purpose capability of the machine, increasing production efficiency and equipment utilization, avoiding interruptions in the work process caused by adjusting the thread supply, facilitating operation, reducing the skill requirements of operators, eliminating adjustment actions, and reducing labor intensity. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of a flexible wire supply device according to the present invention;

[0029] Figure 2 A schematic diagram of the structural layout of the existing power supply device;

[0030] Figure 3 A schematic diagram of the structural movement of an existing wire supply device;

[0031] Figure 4 A schematic diagram showing the cable supply capacity of the existing cable supply system;

[0032] Figure 5 A schematic diagram showing the supply and demand of existing power supply equipment;

[0033] Figure 6 This is a schematic diagram showing the adjusted supply and demand of a flexible cable supply device according to the present invention.

[0034] Figure 7 The spindle rotation curve of a flexible wire supply device according to this utility model Figure 1 ;

[0035] Figure 8 for Figure 6 The following is a supply-demand curve diagram;

[0036] Figure 9 The spindle rotation curve of a flexible wire supply device according to this utility model Figure 2 ;

[0037] Figure 10 for Figure 8 The following is a supply-demand curve diagram;

[0038] Figure 11 This is a schematic diagram of a sewing device that utilizes a flexible thread supply device according to the present invention.

[0039] Figure 12 This is a three-dimensional structural diagram of the flexible wire supply device of this utility model;

[0040] Figure 13 for Figure 11 Color images;

[0041] Figure 14 for Figure 12 Color images;

[0042] 1. String take-up crank

[0043] 2. Line-lifting rod

[0044] 3. Line-lifting pole

[0045] 31. Thread take-up arm

[0046] 32. Wire passage hole

[0047] 4. Adjust the crank

[0048] 100. Line-lifting lever I

[0049] 200, left hook

[0050] 300, Right hook

[0051] 400, connecting rod

[0052] 500. String Picking Crank I

[0053] 600, casing

[0054] 700, long slot. Detailed Implementation

[0055] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only for illustrating this application and are not intended to limit the scope of this utility model.

[0056] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0059] like Figure 1 , 11 -14, A flexible wire feeding device, including a wire lifting crank 1, a wire lifting connecting rod 2, and a wire lifting rod 3. The wire lifting rod 3 includes a wire lifting arm 31 and a wire passing hole 32. One end of the wire lifting connecting rod 2 is hinged to the wire lifting rod 3, and the other end of the wire lifting connecting rod 2 is hinged to an adjustment component.

[0060] The adjustment assembly includes an adjustment crank 4 and a drive source. One end of the adjustment crank 4 is hinged to the drive source, and the other end of the adjustment crank 4 is hinged to the line take-up rod 2. The adjustment assembly moves the line take-up rod 2 and the hinged end of the adjustment crank 4 to the target position through the adjustment crank 4, so that the line take-up rod 32 performs the target stroke through the line pass hole 32.

[0061] When implementing this application, the key points are as follows: The core of adjusting the thread supply in a sewing machine lies in accurately controlling the amount of thread fed out and taken back according to different fabric thicknesses, thread types and sewing processes, so as to ensure stable thread tension and neat stitches;

[0062] This application provides a thread-taking mechanism with multiple degrees of freedom, and achieves flexible control of the thread supply of the thread-taking mechanism by adding a new drive source;

[0063] By changing the original fixed hinge position of the line-lifting link 2, that is, changing the position of the line-lifting link 2 in the linkage mechanism, the reciprocating motion trajectory of the line-lifting rod 3 through the line hole 32 changes, that is, the displacement difference between the highest and lowest points changes, thus obtaining the target line supply amount; for example Figure 4 As shown, the displacement difference and the amount of wire supplied are positively correlated;

[0064] The original fixed hinge end of the line-lifting link 2 remains a fixed hinge end, but its position is changed by adjusting the crank 4 to drive the line-lifting link 2.

[0065] The adjusting crank 4 can be swung, and the position after the swing is locked or allowed to move, without affecting the free rotation of the hinged positions at both ends of the line take-up linkage 2, thereby obtaining the target line supply amount;

[0066] In the first case, the hinged position of the adjusting crank 4 and the line-fetching rod 2 after swinging is locked and cannot be moved. This results in a reciprocating motion trajectory of the line-fetching rod 3 through the line hole 32, which has a maximum and minimum limit, i.e. the target line supply amount.

[0067] In the second scenario, the hinge position of the adjusting crank 4 and the thread-carrying rod 2 after swinging is allowed to move. That is, the target position is a process position in the reciprocating motion trajectory of the thread-carrying rod 3's thread-passing hole 32. This is for the purpose of obtaining a larger or smaller thread supply. Through dynamic adjustment, the value of the thread supply can be adjusted to a larger range. In one reciprocating motion trajectory of the thread-carrying rod 3's thread-passing hole 32, the adjusted crank 4 after swinging will ensure that the hinge position of the adjusting crank 4 and the thread-carrying rod 2 achieves at least two target positions, so that the thread-passing hole 32 of the thread-carrying rod 3 is located at the highest point and the lowest point, respectively.

[0068] The working principle or process of this application is as follows:

[0069] The adjustment assembly drives the adjustment crank 4 to rotate to a certain angle through the drive source. Since the end of the adjustment crank 4 is hinged to the line-fetching connecting rod 2, the position of the hinge end of the line-fetching connecting rod 2 and the adjustment crank 4 changes. Since the other end of the line-fetching connecting rod 2 is hinged to the line-fetching rod 3, the fixed hinge end of the line-fetching rod 3 changes due to the change of the connecting rod 2 in the connecting rod structure. Therefore, the upper and lower limit positions of the movement of the line-fetching rod 3 change, that is, the limit position of the cyclic movement of the line-fetching rod 3 through the line hole 32 changes, thereby obtaining the target line supply amount.

[0070] Alternatively, the adjustment component drives the adjustment crank 4 to rotate to an angle via a drive source, and this angle is a dynamically related spindle rotation angle. The spindle rotation angle drives the thread take-up crank 1 to rotate, and the thread take-up crank 1 drives the thread take-up lever 3 to move.

[0071] Therefore, by adjusting the swing angle of crank 4 and controlling the spindle rotation angle, the two are dynamically linked to form a dynamic wire supply adjustment. That is, within one revolution of the spindle, the swing angle of crank 4 is adjusted to execute the corresponding target swing angle, so that the wire supply meets the target wire supply curve and achieves a more complex dynamic adjustment of the wire supply.

[0072] like Figure 5 Curve I represents the thread requirement for sewing thin materials with a small stitch pitch, while curve III represents the standard thread supply. In this case, curve III envelops curve I, resulting in a reasonable supply-demand thread match. When sewing thick materials with a large stitch pitch, the corresponding thread requirement is shown in curve II. It can be seen that curves II and III exhibit significant interference in areas a, b, and c, indicating insufficient thread supply, which can easily lead to poor stitches or even thread breakage. The conventional method is to shift the right thread hook 300mm to the left by a slight displacement to fine-tune the thread supply. Figure 5 As shown in curve IV, it can be observed that after the right hook is shifted 300 degrees to the left, the supply and demand line quantity matching at region b is significantly improved, but the impact on regions a and c is relatively small. This is because the "quasi-sine" shape of the supply and demand curve is determined by the structural form and rod length parameters of the four-bar linkage line-carrying mechanism. Changing the position of the right hook alone can only play a minor role in adjusting the peak value of the line quantity.

[0073] By using this application, the following can be achieved: Figure 6 , Figure 8 , Figure 10 The supply-demand quantity curve; the difference lies in, Figure 6 The amount of wire supplied when the swing angle of crank 4 is a constant value;

[0074] Figure 8 To adjust the swing angle of crank 4 by matching the motor rotation angle in the diagram, the swing angle and the spindle rotation angle are adjusted accordingly. Figure 7 The curve execution;

[0075] like Figure 7When the control curve function shown is used, the wire supply provided by the wire take-up mechanism can be in the form of a "non-sine-like" curve, such as... Figure 8 As shown in curve IIV: it can be seen that curves II and IV have no interference in regions a, b, and c, indicating sufficient thread supply, which can make the sewing stitches flatter and more beautiful, reduce thread tension, and lower the breakage rate.

[0076] Figure 10 To adjust the swing angle of crank 4 by matching the motor rotation angle in the diagram, the swing angle and the spindle rotation angle are adjusted accordingly. Figure 9 The curve execution;

[0077] Figure 9 When the control curve function shown is used, the wire supply provided by the wire take-up mechanism can be in another "non-sine-like" curve form, such as... Figure 10 As shown in curve IIV: it can be seen that curves II and IV have no interference in regions a, b, and c, indicating sufficient thread supply, which can make the sewing stitches flatter and more beautiful, reduce thread tension, and lower the breakage rate.

[0078] For multi-degree-of-freedom thread take-up mechanisms, when sewing thin materials with small stitch pitch, the swing angle can be set to a constant value through the electronic control system, and corresponding... Figure 6 For the "quasi-sine" regular thread feed of curve III, the thread take-up mechanism is no different from a regular four-bar thread take-up mechanism. However, when sewing thick materials with a large stitch length, the swing angle should be set to a pre-set spindle rotation angle function corresponding to the stitch length and fabric thickness via the electronic control system, and a corresponding... Figure 8 or Figure 10 The "non-sinusoidal" wire supply of the mid-curve IIV (or other forms of "non-sinusoidal" wire supply). Because this wire-carrying mechanism has dual drive sources and multiple degrees of freedom, it does not have the parameter limitations of a four-bar linkage. Theoretically, the peak value and "width" of the wire supply curve can be freely adjusted, which greatly improves the possibility of reasonable matching of supply and demand wire quantities and can meet diverse wire supply needs.

[0079] Specifically, in one embodiment of this application, the drive source drives the adjusting crank 4 to rotate, swing, or move, so that the hinged end of the adjusting crank 4 and the line-fetching rod 2 moves to the target position. This application does not exclude the adjustment crank 4 from completing the action of moving the hinged end of the adjusting crank 4 and the line-fetching rod 2 to the target position by swinging or moving.

[0080] Specifically, in one embodiment of this application, the drive source is a motor. Since the sewing machine spindle rotates, the thread supply is dynamically met through periodic swing angle cycles, which facilitates matching and execution.

[0081] Specifically, in one embodiment of this application, the drive source includes a motor and a lead screw sliding pair. The adjustment crank 4 is moved by driving the motor and the lead screw sliding pair, or the hinge end of the wire take-up connecting rod 2, which was originally fixed, is moved directly to achieve the action of moving to the target position and completing the dynamic and static wire supply.

[0082] Specifically, in one embodiment of this application, a clearance part is provided at one end of the adjusting crank 4. The clearance part is used to avoid interference with the movement, which is suitable for the modification and implementation of existing equipment, thereby facilitating the upgrading of the equipment and making full use of the existing equipment.

[0083] Specifically, in one embodiment of this application, the avoidance part includes an L-shape, and the bend has a smooth rounded corner. The wall thickness at the bend is greater than that at other adjacent locations, making the structure robust and reliable.

[0084] Specifically, in one embodiment of this application, both ends of the adjusting crank 4 are provided with rotating drums. The rotating drum at one end of the adjusting crank 4 is coaxially and fixedly connected to the drive source, and the rotating drum at the other end of the adjusting crank 4 is hinged to the line-fetching connecting rod 2; this simplifies the structure.

[0085] One end of the adjusting crank 4 is fixedly connected to the drive source, and neither of them can rotate.

[0086] One end of the adjusting crank 4 is hinged, and the line-picking connecting rod 2 is also hinged. The two rotate freely relative to each other, forming a rotating pair.

[0087] Specifically, in one embodiment of this application, the thread-taking crank 1 is mounted on the main shaft, one end of the thread-taking rod 3 is hinged to the thread-taking crank 1, and the other end of the thread-taking rod 3 is hinged to the thread-taking connecting rod 2; the thread-taking rod 3 is provided with an extended thread-taking arm 31, and the thread-taking arm 31 has a thread-passing hole 32.

[0088] Specifically, in one embodiment of this application, the take-up lever 3 is equipped with a left hook 200 and a right hook 300. The left hook 200 and the right hook 300 are disposed on the housing 600. The housing 600 is provided with a long groove 700, and the take-up arm 31 extends out of the long groove 700.

[0089] Specifically, in one embodiment of this application, a sewing device employs a flexible thread supply device, which is equipped with an electronic control system for controlling and adjusting components.

[0090] In summary, this invention aims to solve the problems of inaccurate thread supply adjustment, unstable thread tension control, and difficulty in adapting to the sewing needs of various fabrics in existing sewing equipment. It proposes a thread supply adjustment mechanism with a simple structure, flexible adjustment, and strong synchronization, enabling precise control of the thread supply process, effectively improving sewing quality and equipment adaptability. It is particularly suitable for automated sewing scenarios with high requirements for stitch stability and sewing consistency. By pre-designing the real-time rotation angle function of the motor in conjunction with the spindle rotation, the thread take-up process can be flexibly controlled, changing the specific shape of the thread supply curve of the take-up mechanism to achieve adaptive sewing of materials of varying thicknesses. This reduces thread tension and improves the stability, smoothness, and aesthetics of the fabric stitches.

[0091] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A flexible wire feeding device, comprising a wire-lifting crank (1), a wire-lifting connecting rod (2), and a wire-lifting rod (3), wherein the wire-lifting rod (3) includes a wire-lifting arm (31) and a wire-passing hole (32), and one end of the wire-lifting connecting rod (2) is hinged to the wire-lifting rod (3), characterized in that, An adjustment assembly is hinged to the other end of the line-lifting rod (2); The adjustment assembly includes an adjustment crank (4) and a drive source. One end of the adjustment crank (4) is hinged to the drive source, and the other end of the adjustment crank (4) is hinged to the line take-up rod (2). The adjustment assembly moves the line take-up rod (2) and the hinged end of the adjustment crank (4) to the target position through the adjustment crank (4), so that the line take-up rod (32) through the line hole (32) performs the target stroke.

2. The flexible cable supply device as described in claim 1, characterized in that, The drive source drives the adjusting crank (4) to rotate, swing or move, so that the hinge end of the adjusting crank (4) and the line-picking rod (2) moves to the target position.

3. The flexible cable supply device as described in claim 2, characterized in that, The driving source is an electric motor.

4. The flexible cable supply device as described in claim 2, characterized in that, The drive source includes a motor and a lead screw moving pair.

5. The flexible cable supply device as described in claim 1, characterized in that, One end of the adjusting crank (4) is provided with a clearance part, which is used to avoid interference with the movement.

6. A flexible cable supply device as described in claim 5, characterized in that, The clearance section includes an L-shape, with smooth rounded corners at the bend.

7. A flexible cable supply device as described in claim 5, characterized in that, Both ends of the adjusting crank (4) are equipped with rotating drums. The rotating drum at one end of the adjusting crank (4) is coaxially and fixedly connected to the drive source, and the rotating drum at the other end of the adjusting crank (4) is hinged to the line-fetching rod (2).

8. The flexible cable supply device as described in claim 1, characterized in that, The thread-taking crank (1) is mounted on the main shaft. One end of the thread-taking rod (3) is hinged to the thread-taking crank (1), and the other end of the thread-taking rod (3) is hinged to the thread-taking connecting rod (2). An extended thread-taking arm (31) is provided on the thread-taking rod (3), and the thread-taking arm (31) has a thread hole (32).

9. A flexible cable supply device as described in claim 8, characterized in that, The take-up lever (3) is equipped with a left hook (200) and a right hook (300). The left hook (200) and the right hook (300) are set on the housing (600). The housing (600) is provided with a long groove (700). The take-up arm (31) extends out of the long groove (700).

10. A sewing device, characterized in that, The device includes a flexible cable supply device as described in any one of claims 1-9, wherein the flexible cable supply device is equipped with an electrical control system for controlling the adjustment components.

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