777results about "Sewing-machine control devices" patented technology

The utility model provides a driving mechanism for button sewing movement of a button sewing clamp in a button sewing machine, and belongs to the technical field of sewing. The technical problem that an existing button sewing clamp is low in stability when a button moves back and forth at a high speed is solved. According to the driving mechanism for the button sewing clamp to move the button in the button sewing machine, the button sewing machine comprises a machine shell, a lower shaft and the button sewing clamp, a button clamp base is arranged at the position, above the lower shaft, of the machine shell, the rear end of the button sewing clamp is connected with the rear end of the button clamp base, the driving mechanism comprises a swing rod, the swing rod is rotationally connected into the machine shell through a rotating shaft, and an avoiding connector is arranged at the front end of the swing rod. The lower shaft penetrates through the avoiding connector, and the upper end part of the avoiding connector is movably connected with the front end of the buckling and clamping seat. The nail catcher has the advantages of being compact in structure and enabling the nail catcher to move more stably.

The present application provides a cloth feeding mechanism and a sewing machine for a sewing machine, specifically relating to the technical field of sewing machine manufacturing. The cloth feeding mechanism has a cloth feeding drive source and a lifter drive source. The cloth feeding drive source indirectly drives the tooth carrier of the cloth feeding mechanism. While the cloth feeding drive source indirectly drives the tooth carrier, the lifter drive source directly drives the same tooth carrier to generate a swinging motion. The tooth carrier and its cloth feeding teeth, under the combined action of the lifter drive source and the cloth feeding drive source, cause the cloth feeding teeth to perform a cloth feeding action. By using the cloth feeding drive source to indirectly drive the tooth carrier of the cloth feeding mechanism, and while the cloth feeding drive source indirectly drives the tooth carrier, the lifter drive source directly drives the same tooth carrier to generate a swinging motion, it is realized that the tooth carrier and its cloth feeding teeth, under the combined action of the lifter drive source and the cloth feeding drive source, cause the cloth feeding teeth to perform a cloth feeding action. The present application makes full use of the drive source of the sewing machine, effectively improves the utilization efficiency of the power of the sewing machine, greatly reduces the manufacturing cost of the sewing machine, and has high value for use and promotion.

The present invention provides a driving device for thread cutting, presser foot lifting and needle pitch adjustment, belonging to the technical field of sewing machines. It solves the problems such as reduced working efficiency of the existing device when meeting the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor. The driving device for thread cutting, presser foot lifting and needle pitch adjustment includes a motor. A separately arranged thread cutting cam, a presser foot lifting cam and a needle pitch adjusting cam are fixedly connected to the rotating shaft of the motor. Both the thread cutting cam and the presser foot lifting cam are diamond-shaped, and the needle pitch adjusting cam is a curved quadrilateral. The needle pitch adjusting mechanism abuts against the outer peripheral wall of the needle pitch adjusting cam. When the effective needle pitch adjusting section of the needle pitch adjusting cam acts on the needle pitch adjusting mechanism, the thread cutting idle stroke surface of the thread cutting cam acts on the thread cutting mechanism, and the lifting idle stroke surface of the presser foot lifting cam acts on the presser foot lifting mechanism. This device meets the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor and improves the working efficiency of the sewing machine at the same time.

The invention provides a cloth stem-crossing detection sewing device and method. The cloth stem-crossing detection sewing device comprises a first presser foot rod provided with an outer presser foot, a second presser foot rod provided with an inner presser foot, a presser foot transmission mechanism, a control module, a sewing material thickness detection sensor, an alternating quantity adjusting mechanism, an alternating quantity detection sensor and an alternating quantity adjusting driving source. The sewing material thickness detection sensor is obliquely mounted at the bottom of the sewing machine shell; detection points, falling on the sewing material, of the sewing material thickness detection sensor are distributed on the rear sides of the outer presser foot and the inner presser foot in the feeding direction of forward feeding during forward sewing of the sewing machine; the presser foot transmission mechanism is provided with a transmission swing seat for determining the alternating quantity of presser feet, and the alternating quantity adjusting driving source is connected with the transmission swing seat through the alternating quantity adjusting mechanism. The sewing material thickness is effectively detected in advance, so that the presser foot alternation amount is adjusted in time, the presser foot alternation amount of the sewing machine adapts to the change of the sewing material thickness, efficiency is improved, stem-crossing stitches are beautified, and sewing quality is guaranteed.

The utility model discloses a synchronous belt transmission sewing machine which comprises a sewing machine body, the sewing machine body is provided with a machine base, a sewing machine head and a rotating shuttle assembly, and a front section main shaft, a rear section main shaft, a front section auxiliary shaft and a rear section auxiliary shaft are arranged on the machine base. A lifting driving device is arranged on the machine base and drives the sewing machine head to ascend and descend so as to adjust the height of the sewing machine head. The front-section main shaft and the front-section auxiliary shaft are arranged on the sewing machine head; the rear-section main shaft is in transmission connection with the front-section main shaft through a first synchronous belt transmission device; the rear-section countershaft is in transmission connection with the front-section countershaft through a second synchronous belt transmission device; therefore, compared with a matching mode of protrusions and grooves, transmission matching among the first synchronous wheel, the second synchronous wheel, the first synchronous belt, the linkage synchronous wheel, the second synchronous belt and the sewing machine head has the advantages that sliding is avoided during sewing, the transmission ratio is accurate, the transmission efficiency is high, the sewing needle pitch is uniform, and the sewing quality consistency is good. And the working process of the sewing machine head is more stable.

The present invention proposes a sewing machine with stitch length adjustment and zero-position positioning of a swing seat, specifically relating to the technical field of sewing machine manufacturing, comprising a driving source, a connecting rod, and a swing seat, characterized in that it also comprises an adjusting wheel and a slider, wherein the driving source drives the slider on the output shaft to indirectly position the swing seat at zero, and the slider is arranged on a slide groove of the adjusting wheel, the adjusting wheel is connected to the connecting rod, and the connecting rod is hinged to the swing seat. The present application has the characteristics of high accuracy in positioning the zero point of the swing seat, the static positioning wheel is fixed and equipped with an adjusting wheel to make the operation more stable, the gap between the various components is small after positioning, the degree of mechanical wear of the various components is small, and the noise is relatively low, which has the advantages of stable operation and high promotion and use value.

The invention relates to a thread trimming control method, a thread trimming control system and a sewing machine, the thread trimming control method comprises the following steps: arranging a first sensor, a second sensor and a third sensor which are arranged in sequence, the distance between the first sensor, the second sensor and the third sensor is L1, and the distance between the second sensor and the third sensor is L2; when the fabric reaches the second sensor from the first sensor, the controller calculates that the current stitch length of the sewing machine is O1 = L1 / N, and N is the number of turns of rotation of the sewing machine; the controller calculates the number of turns of rotation required by the sewing machine within the distance of L2, M = L2 / O1 = m + n, and m is an integer, 0 lt; nlt; 1; when ngt; k, when the fabric passes through the second sensor, the controller adjusts the stitch length of the sewing machine through the execution motor and the stitch length adjusting mechanism, so that the adjusted stitch length O2 meets the condition that L2 / O2 = x + y, and x is an integer, 0 lt; yt; Yt; 1, y < = k, 0.4 < = k < = 0.6; when n is smaller than or equal to k, the sewing machine continues sewing according to the stitch length of O1. According to the thread trimming control method, the thread trimming control system and the sewing machine, the problem that under the existing large-stitch-length sewing working condition, cloth and thread residues are very prone to being scattered is solved.

The utility model belongs to the technical field of sewing machines, and particularly relates to a double-stepping overedger which comprises a machine body, and a thread trimming assembly, a presser foot lifting assembly, a feed lifting tooth shaft and a feeding tooth frame are arranged in the machine body. The first stepping motor is arranged on the side face of the machine body, a first motor shaft is arranged in the first stepping motor, and double cams are installed on the periphery of the first motor shaft and used for driving the thread trimming assembly and the presser foot lifting assembly to act; the second stepping motor is arranged on the side face of the machine body, a second motor shaft is arranged in the second stepping motor, a first crank is installed on the periphery of the second motor shaft, and one end of the first crank is connected with a connecting rod. The second stepping motor can control the height of the feeding tooth frame, the rotation angle of the stepping motor is utilized to enable the teeth to operate according to the set height, through double-stepping control, non-pneumatization and non-electromagnet are achieved, production noise can be lowered, and the sewing effect is improved.

A sewing machine external unit includes: a holder holding fabric; a driver being detachable from a bed of a sewing machine and driving the holder along an upper surface of the bed; a pressing member moving in an up-down direction according to movement of a sewing needle in the up-down direction, pressing the fabric while the sewing needle is stuck in the fabric, and rising together with the sewing needle in response to the sewing needle coming out of the fabric and rising; a position detector detecting a position of the pressing member in the up-down direction; a signal output part outputting a signal to the sewing machine; and a controller outputting a needle drive signal for driving the sewing needle from the signal output part to the sewing machine, and controlling driving of the holder and / or the sewing needle based on a detection result of the position detector.

The utility model relates to the technical field of bartacking machines, in particular to a combined driving mechanism of a bartacking machine and the bartacking machine. Comprising a thread sweeping mechanism used for executing a thread sweeping action; the presser foot lifting mechanism is used for executing a presser foot lifting action; the thread trimming mechanism is used for executing a thread trimming action; the driving motor is used for driving the thread sweeping mechanism, the presser foot lifting mechanism and the thread trimming mechanism to work; the thread sweeping mechanism comprises a thread sweeping action assembly, a thread sweeping mechanism and a thread sweeping mechanism, the transmission arm is used for being connected with the driving motor; the thread sweeping connecting rod is used for connecting the thread sweeping action assembly and the transmission arm, so that the driving motor can drive the thread sweeping action assembly to execute the thread sweeping action; the thread sweeping mechanism further comprises an independent driving assembly, and the independent driving assembly can independently drive the thread sweeping mechanism to work.

An exemplary sewing machine includes a sewing head, a needle bar holding a needle, a motor for moving the needle during a sewing operation, a user interface, a data gathering device, a data storage device, and a processor. The data gathering device gathers data related to at least one of the sewing machine, an environment surrounding the sewing machine, a sewing material, the sewing operation performed by the sewing machine, and one or more interactions of a user with the sewing machine. The data storage device stores gathered data and data related to a neural network. The processor processes the gathered data through the neural network to generate processed data. Based on the processed data, the processor controls at least one of the user interface, the data storage device, and the motor.

The integrated towel after-finishing production line comprises a longitudinal sewing machine, a transverse sewing machine, a rotary towel conveying table, a detection conveying table and a sorting table which are connected end to end, the production line is arranged in a U shape, the longitudinal sewing machine is parallel to the rotary towel conveying table, the detection conveying table and the sorting table which are connected into a line, and the transverse sewing machine is connected with the longitudinal sewing machine and the rotary towel conveying table at the end. According to the utility model, multiple procedures of longitudinal sewing, slicing, transverse sewing, detecting and sorting of the cloth towel are automatically completed on one production line, so that the production efficiency is improved, and the labor investment is reduced.

The cloth pressing device for the patch pocket machine is composed of an inner cloth pressing structure and an outer cloth pressing structure, the inner cloth pressing structure comprises an inner cloth pressing driving component and an inner pressing block component, and the outer cloth pressing structure is composed of a bottom frame and three or more outer cloth pressing modules fixed to the bottom frame. In the outer cloth pressing structure part, three or more outer cloth pressing modules can be selected according to the shape of pocket cloth, and a motor can be started to control the extending distance of outer pressing blocks in the outer cloth pressing modules according to the size of pocket cloth pieces. According to the inner cloth pressing structure part, the shapes of the outer pressing blocks can be selectively replaced according to the shapes of the pocket cloth pieces, and the number of the outer pressing blocks can be adjusted according to the sizes of the pocket cloth pieces. Different cloth pressing modules do not need to be manufactured according to different cloth piece shapes and sizes, the structure is simple, operation is convenient, and large-scale production is easy to achieve.

The utility model discloses a braid splicing device which comprises a supporting seat, a first transmission column, a second transmission column, a limiting portion, a sewing machine, a power component and a controller, the first transmission column and the second transmission column are arranged on the supporting seat, and the position of the first transmission column and / or the second transmission column relative to the supporting seat can be adjusted. The first transmission column and / or the second transmission column are / is connected with the power component, the controller is electrically connected to the power component and the sewing machine, when the braid is wound around the first transmission column and the second transmission column, the braid is located on the inner side of the limiting part, the limiting part is used for abutting against the braid to enable the braid to move towards the inner side, and the controller can control the power component to operate. The first transmission column and / or the second transmission column are / is driven to rotate, the sewing machine is synchronously controlled to operate, and adjacent braids can be spliced. According to the device for splicing the ribbon and other strip-shaped objects, manpower and material resources are saved, large carpets / ground mats can be formed, and application and popularization are facilitated.

The technical scheme belongs to the technical field of sewing machines, and particularly relates to a double-moving-cutter thread trimming sewing machine which comprises a rack, a thread trimming mechanism and a rotating shuttle mechanism. The thread trimming mechanism comprises a first movable cutter assembly, a second movable cutter assembly and a driving assembly; the first movable cutter assembly and the second movable cutter assembly are rotationally arranged on the outer side of the matched rotating shuttle mechanism in a sleeving mode. The driving assembly drives the first movable cutter assembly to rotate between a first position and a second position around the axis and drives the second movable cutter assembly to move between a third position and a fourth position around the rotating axis. The first movable cutter assembly comprises a first thread trimming movable cutter, and the first thread trimming movable cutter is provided with a thread hole groove allowing a machine needle to penetrate through and hooking a sewing thread in the sewing starting stage and a first thread hooking groove allowing the sewing thread to be hooked in the ending stage; the second movable cutter assembly comprises a second thread trimming movable cutter; the thread hole groove or the first thread hooking groove hooks the sewing thread, the second thread trimming movable cutter is driven to rotate around the axis to abut against the surface of the first thread trimming movable cutter, the cutting edges of the two thread trimming movable cutters coincide to cut off the sewing thread, thread ends are reduced, and production efficiency is improved.

The utility model discloses an anti-nest thread bonding device and a sewing machine in the technical field of sewing machines. The anti-nest thread bonding device comprises an auxiliary thread trapper. The connecting end of the wire bonding plate is connected with the auxiliary wire clamping device, and the wire bonding end of the wire bonding plate and the auxiliary wire clamping device can rotate relative to each other; the wire bonding driving assembly is arranged on one side of the auxiliary wire clamping device, and the wire bonding driving assembly is provided with a wire bonding iron core shaft capable of axially moving in a reciprocating mode; the connecting rod is arranged between the wire bonding plate and the wire bonding driving assembly, one end of the connecting rod is hinged to the wire bonding iron core shaft, and the other end of the connecting rod is hinged to the wire bonding plate, so that the wire bonding end of the wire bonding plate is driven to swing through axial movement of the wire bonding iron core shaft. The thread bonding mechanism not only realizes the thread bonding action and prevents the generation of bird nests, but also has the advantage of simple structure, simultaneously avoids the problem that the hand is blocked by the operation space of the machine head, and enables the sewing machine to have a neat appearance.

The utility model relates to the technical field of sewing equipment, in particular to an improved thread trimming mechanism of a sewing machine, which comprises a thread trimming structure, and the thread trimming structure comprises a movable cutter unit and a fixed cutter matched with the movable cutter unit for use; the movable cutter unit comprises a driving part, an annular supporting seat, a mounting part integrally formed with the annular supporting seat and a cutter, the cutter is mounted on the mounting part through a fastener, a first blade part is arranged on the cutter, and a second blade part meshed with the first blade part is arranged on the fixed cutter; the driving piece drives the annular supporting base to rotate so as to drive the first blade part of the cutter to approach the second blade part of the fixed cutter to cut off the thread residues. According to the thread trimming structure, the complex structure of a traditional thread trimming mechanism is simplified, and the manufacturing and maintenance cost is reduced. Meanwhile, the conveying mechanism is composed of a first gear, a second gear and a conveying belt, belt conveying transmits power through friction or synchronous gear meshing, instant impact force can be effectively reduced, and the problems of vibration and noise caused by rigid transmission are solved.

The present application particularly relates to a sewing machine for realizing intermittent cloth feeding operation, comprising a cloth feeding assembly and an intermittent driving assembly. The cloth feeding assembly comprises a cloth feeding wheel and a transmission rod connected to the cloth feeding wheel. The intermittent driving assembly comprises a driving body, a planetary gear assembly connected to the driving body and driving the transmission rod based on the driving body. The driving body has an axis, an eccentric wheel arranged at the axis, and an output connected to the eccentric wheel and the planetary gear assembly. The eccentric wheel is shaped with a plurality of first teeth at the outer edge. The output is shaped with a plurality of second teeth matched with the first teeth. The eccentric wheel performs an elliptical motion relative to the output after being driven by the axis. The output outputs kinetic energy to the planetary gear assembly only when the first teeth engage the second teeth.

The utility model discloses an upper thread supply mechanism of a sewing machine, and relates to the technical field of sewing machines. The sewing machine is provided with a machine arm, a main shaft motor is arranged on the machine arm, the main shaft motor is in locking connection with a main shaft to drive the main shaft to rotate, and the upper thread supply mechanism of the sewing machine comprises a driving motor, a thread take-up lever, a thread passing hook and other components. The upper thread feeding mechanism of the sewing machine is additionally and independently provided with the driving motor as an independent driving source, so that the situation that the control relation between the upper thread feeding mechanism and the movement of the main shaft is complicated due to the fact that the movement of the take-up lever is controlled by the rotation of the main shaft motor is avoided. The upper thread feeding mechanism solves the problem that in the prior art, the thread taking-up amount of the upper thread feeding mechanism is difficult to adjust rapidly according to the type of fabric.

The invention belongs to the technical field of automatic cutting bed machines, and particularly relates to a process for sewing internal parts of an automatic cutting bed machine, which comprises the following steps: a part positioning and pretreatment step, a sewing line planning step, a sewing equipment adjustment step, a sewing execution step and a quality detection and repair step. The sewing precision can be improved, and the stability of product quality is guaranteed; the sewing efficiency is remarkably improved, the production cycle is shortened, and the large-scale production requirement is met; meanwhile, the sewing machine is suitable for sewing internal parts made of various materials, and especially the sewing effect on special materials can be improved.

The invention relates to a sewing machine and a cloth pricking stroke adjusting device thereof. The cloth pricking stroke adjusting device comprises a driving mechanism, and an output shaft of the driving mechanism rotates to drive a presser foot lifting cam and an adjusting crank to rotate to a working position; the working positions comprise at least one adjusting position of the presser foot lifting cam and at least one adjusting position of the adjusting crank; the adjusting position of the presser foot lifting cam corresponds to the upper limit position and the lower limit position of the foot lifting module; the adjusting crank is hinged to the adjusting connecting rod, the adjusting position of the adjusting crank corresponds to the target angle of the adjusting crank, and the driving mechanism drives the adjusting crank to swing to the target angle, so that the position of the fixed end of the adjusting connecting rod changes along with the target angle of the adjusting crank. By adjusting the position target of the fixed end of the connecting rod, the target cloth puncturing stroke is correspondingly adjusted, the cloth puncturing stroke adjusting device is applied to the sewing machine, and the sewing machine with the cloth puncturing stroke adjusting function is obtained.

The operability of a feeding rod is improved in a sewing machine using an actuator to adjust the feeding amount of an object to be sewn. The sewing machine comprises a feed adjusting mechanism which changes and adjusts the feed amount of a sewed object through an actuator; a setting input unit that sets a feed amount; and a control device for controlling the operation amount of an actuator of the feed adjustment mechanism according to the set value of the feed amount from the setting input unit, the sewing machine comprising: a feed lever for changing and adjusting the feed amount by a rotation operation from an initial position; a first return spring that returns the feed rod to an initial position; and a detection unit that detects the amount of operation of the feed rod from the initial position, the control device does not vary the amount of operation of the actuator when the amount of operation of the feed rod from the initial position detected by the detection unit is within a first amount of operation, and the control device does not vary the amount of operation of the actuator when the amount of operation exceeds the first amount of operation. The control device varies the operation amount of the actuator in accordance with the operation amount.

The invention relates to the technical field of data processing, in particular to an intelligent data processing method of intelligent needle management equipment. Obtaining a signal deviation factor according to the fluctuation difference characteristic and the position distribution characteristic of the two envelope lines of the vibration signal time sequence; decomposing the vibration signal time sequence through an EMD algorithm; obtaining a to-be-adjusted envelope line of the residual signal according to the signal deviation factor; obtaining the similarity degree according to the IMF components and the difference characteristics of the corresponding residual signals; the asymmetry degree of the residual signals is obtained according to the discrete features and the data difference features of the extreme values in the residual signals; and adjusting the weight of the envelope line to be adjusted according to the similarity degree and the asymmetry degree. The method comprises the following steps: continuously decomposing through an EMD algorithm according to an envelope line and an adaptive weight of a residual signal to obtain all IMF components of a vibration signal time sequence; and the accuracy of signal decomposition and needle state analysis is improved.

The utility model discloses a computer back hook machine of quick start -stop, relates to back hook machine field, including stable conveying frame, the inside installation of stable conveying frame's opening place sliding limit mouth, the left and right sides of sliding limit mouth are equipped with the transmission elastic mechanism that carries out the rotation of transmission bite link, transmission elastic mechanism includes rotary drive motor, and rotary drive motor fixed mounting is in the side of stable conveying frame. This computer back hook machine of quick start -stop, when needing to carry out quick conveying start -stop operation to cloth, directly starts rotary drive motor and drives left and right two groups transmission bite link through the connection transmission belt, cloth will be driven along stable conveying frame and be driven stably, and rotary drive motor can make the equipment automatic start -stop through the position of detection anti -run -off bending plate, and the design of such delivery stability improves, and when producing deviation, can carry out the stop operation quickly, make the use intelligent nature and stability of equipment improve.

The utility model discloses a top fly machine, which relates to the technical field of sewing machines and comprises a workbench provided with a top fly processing area for placing cloth. The sewing mechanism comprises a machine head and an X-direction driving assembly, and the X-direction driving assembly is used for driving the machine head to slide in the X direction; the cutting mechanism is arranged above the front fly machining area and comprises a first cutting driving assembly, a second cutting driving assembly, a linear cutting knife and an angle knife, the first cutting driving assembly is used for driving the linear cutting knife to vertically ascend and descend, and the second cutting driving assembly is used for driving the angle knife to vertically ascend and descend; the presser foot mechanism can be pressed down above the cloth in the front fly processing area to drag the cloth to walk in the Y direction. According to the utility model, a single sewing needle can be adopted to sew on cloth according to a U-shaped track, the cost of a machine head is reduced, a Y-shaped kerf can be processed, and the production requirement is met.

The utility model relates to a double-shaft motor oil supply mechanism for a sewing machine and the sewing machine, and the double-shaft motor oil supply mechanism for the sewing machine comprises a double-shaft motor assembly which comprises a first output shaft and a second output shaft; the oil supply assembly is matched with the first output shaft; and the stitch length adjusting assembly is matched with the second output shaft. According to the technical scheme, the problem that in the prior art, lubricating oil conveying of a sewing machine is not stable is effectively solved.

The utility model discloses a positioning and pushing mechanism for a garment sewing machine, which comprises a base, a pushing assembly arranged on the outer surface of the upper side of the base, a positioning assembly arranged on the inner side of the pushing assembly, the positioning assembly comprises a mounting seat, a sliding block fixedly mounted at the bottom of the center of the mounting seat, and a motor I fixedly mounted on the outer surface of one side of the mounting seat. A first motor is arranged on the outer surface of the sewing seat, a positive and negative worm is fixedly mounted at the output end of the first motor, a worm gear frame is meshed with the outer surface of the positive and negative worm, and a rubber strip is fixedly mounted on the outer wall of the upper side of the worm gear frame. The positive worm and the negative worm rotate to drive the two worm wheel frames to rotate, so that the adhesive tape is pressed on the outer surface of the upper side of the garment fabric, by means of the structure, the fabric is positioned and pressed, the positioning accuracy of the fabric is guaranteed, meanwhile, the positioning danger is reduced, and therefore the sewing quality and efficiency of the sewing machine are improved.

Lubricating oil is prevented from being attached to parts which do not need the lubricating oil in the sewing machine. The sewing machine includes a sewing machine motor; a needle plate; a lower shaft disposed below the needle plate and rotated by power generated by a sewing machine motor; a conversion member which is fixed to the lower shaft and converts the rotational motion of the lower shaft into a swinging motion; a holding member that holds at least a portion of the conversion member; an oil supply port for supplying lubricating oil between the conversion member and the holding member; and a first cover disposed on at least a portion of the periphery of the conversion member, the size of the first cover being smaller than the size of the lower shaft in the axial direction of the lower shaft.

The utility model provides a cantilever quick hand, including work table surface, be located cantilever on work table surface, cantilever one end is connected in work table surface place, and the other end is suspended and is set on work table surface upside, with the end of cantilever and work table surface between having the space for avoidance, cantilever side rotation is provided with first arm, and first arm end part lift is provided with work rod, first arm is used for driving work rod in the space for avoidance work, the utility model discloses can not occupy the additional equipment area while increasing processing range, and can control work position accurately at the arbitrary position of processing range.

The utility model provides a flat cutter thread trimming mechanism of a sewing machine and belongs to the technical field of sewing machines. The problem that an existing flat cutter thread trimming device is high in maintenance cost is solved. The flat cutter thread trimming mechanism of the sewing machine comprises a fixing frame, a rotating shaft vertically arranged on the fixing frame in a penetrating mode, a fixed cutter horizontally fixed to the fixing frame, a movable cutter connected to the fixing frame in a horizontal swinging mode and a movable handle arranged outside the rotating shaft in a sleeving mode and capable of rotating around the axis of the rotating shaft. The flat cutter thread trimming mechanism of the sewing machine further comprises a driving motor, a long-strip-shaped swing rod and a long-strip-shaped driving rod, an output shaft of the driving motor is vertically arranged, the swing rod and the driving rod are horizontally arranged, one end of the swing rod is fixed to the output shaft, and the other end of the swing rod is hinged to one end of the driving rod. And the other end of the driving rod is hinged with the other end of the movable handle. The flat cutter thread trimming mechanism of the sewing machine has the advantage of low maintenance cost.