948results about "Pressers" patented technology

A system and method for integrated circuit design are disclosed to enhance manufacturability of circuit layouts through generation of hierarchical design rules which capture localized layout requirements. In contrast to conventional techniques which apply global design rules, the disclosed IC design system and method partition the original design layout into a desired level of granularity based on specified layout and integrated circuit properties. At that localized level, the design rules are adjusted appropriately to capture the critical aspects from a manufacturability standpoint. These adjusted design rules are then used to perform localized layout manipulation and mask data conversion.

The invention discloses a ribbon loom, comprising a material guide mechanism, a material stacking mechanism and a feeding mechanism, wherein the material stacking mechanism comprises a fixedly arranged material stacking support plate, a pressing device capable of moving up and down is arranged over the material stacking support plate, one end of the material stacking support plate is provided with a material folding cylinder capable of moving up and down, the drive rod of the material folding cylinder is connected with a material folding plate capable of moving horizontally, and a material stacking cylinder drives the pressing device and material folding cylinder to move up and down.

Individual motors in a sewing machine of the invention are provided, for each of a plurality of machine heads, for individually driving respective mechanical components, such as a needle bar driving mechanism, thread take-up lever and presser foot mechanism. A plurality of rotary hooks are driven by a common motor. Even in a case where embroidering workpieces set on the individual machine heads differ in material between the heads and upper threads used for the machine heads differ in characteristic between the heads, the sewing machine can make, in a concurrent, parallel fashion, embroidery products of different texture suited for the respective materials, characteristics, etc., by setting independent stitch formation per machine head.

The invention discloses a towel machine. The towel machine comprises a feeding device, a first processing device and a second processing device. The feeding device, the first processing device and the second processing device are oppositely and fixedly placed in sequence. The feeding device is used for feeding cloth to the first processing device; the first processing device is used for binding off the two edges of the cloth fed by the feeding device for the first time; the second processing device is used for cutting off the cloth fed by the first processing device and then binding off the two edges of the cloth for the second time. According to the towel machine, original manual operation is replaced by mechanical automatic operation for towel production, so that labor intensity is greatly reduced for workers, the production mode that a single worker operates multiple machines can be realized in production, production efficiency of the product is improved, production cost is lowered, effective production management is facilitated, and the production value of the product is maximized.

The invention provides a feeding mechanism downward movement structure controlled by a presser foot lifting mechanism and a sewing machine. The feeding mechanism downward movement structure includes a presser foot lifting wrench, an eccentric shaft rotatably installed in a machine housing, a dental articulator having a second swinging supporting point, and a feeding tooth installed at one end of the dental articulator; a sliding groove is formed in the dental articulator, the eccentric shaft has a shaft body part and a shaft eccentric part eccentrically arranged on the shaft body part, the presser foot lifting wrench is connected with the shaft body part of the eccentric shaft through a first transmission mechanism, and the shaft eccentric part of the eccentric shaft can be rotatably installed in the sliding groove of the dental articulator and cooperated with the sliding groove in a sliding mode; when a presser foot is lifted, the presser foot lifting wrench swings around a first swinging supporting point and swings around the second swinging supporting point through a first transmission mechanism and an eccentric shaft driven dental articulator, so that the end, provided with the feeding tooth, of the dental articulator moves downward to the upper surface of a needle plate, the effective height between the presser foot and the needle plate after the presser foot is lifted is ensured, and therefore a to-be-sewed material is easily delivered between the presser foot and the needle plate before sewing is started.

An embroidery machine includes a sewing arm having an upper shaft for providing a driving force, a needle bar support case, which is assembled to a front portion of the sewing arm so as to be laterally movable, a needle bar provided in a needle bar support case, the needle bar having a needle at a lower end thereof and vertically carrying the needle using a rotation driving force of the upper shaft, and a presser foot, which is provided in the needle bar support case so as to be vertically movable, characterized in that each of the needle bar and the presser foot is operated by an individual drive mechanism. The presser foot is separately driven by its own drive source, independent of the drive source of the needle bar.

A stitching apparatus with thread tension control is provided. Tension in a thread is monitored during stitching apparatus operations, and remedial action is taken in response to the detection of an anomaly in the thread tension profile. The remedial action can include altering a feed rate of the thread in order to adjust the thread tension, and/or repeating a previous operation. Anomaly detection can be performed with respect to stitching or sewing operations, and also with respect to trim operations performed in connection with moving between elements and/or thread color changes.

The invention provided a sewing machine, improved to automatically switch the sewing machine to the thickness of cloth. This sewing machine includes: a housing having a base plate; a top arm; and a strut for integrating the base plate with the top arm. A metallic presser presses a cloth piece near a stitch forming position. The metallic presser driven by a movable rod is capable of moving between the lift position for releasing the cloth piece and the pressing position for the cloth piece to be pressed. When the metallic presser moves between these positions, the distance of at least one movable rod part from a reference structure fixed to the housing stably changes. The position sensor detects the position of the metallic presser in the pressing position. A control system makes signal connection thereto. The system sets an adjustment variable for the sewing machine depending upon the output value of the position sensor. As a result, the obtained sewing machine automatically performs switching to the thickness of variable cloth piece.

The invention discloses a built-in type automatic pressure foot lifting mechanism of a sewing machine. The built-in type automatic pressure foot lifting mechanism comprises a housing, a linear driver, a back lever, a front lever and a pull rod, wherein the housing comprises an upright column part; a cavity is formed in the upright column part; the linear driver is fixedly mounted in the cavity and comprises a drag rod which is capable of linearly moving in a reciprocating manner; a back pin hole of the back lever is hinged with one end part of the drag rod, a first front pin hole of the back lever is rotationally connected onto the housing through a pin shaft, and the distance from the back pin hole to the first front pin hole is greater than the distance from a second front pin hole to the first front pin hole; the front lever comprises three pin holes, the first pin hole is rotationally connected onto the housing through a pin shaft, and the second pin hole is hinged with a pressure foot lifting plate; and the back end of the pull rod is hinged with the second front pin hole of the back lever, and the front end of the pull rod is hinged with the third pin hole of the front lever. According to the built-in type automatic pressure foot lifting mechanism, the linear driver is arranged in the housing, so the structure of the whole mechanism is more compact, the appearance of the mechanism is more attractive, and vibration and noise produced when the automatic pressure foot lifting device works are also reduced.

The invention discloses a towel machine with high product quality. The towel machine comprises a feeding device, a serging device, a manufacturing device and a hot melting device. The feeding device is fixedly connected with the serging device. The manufacturing device and the serging device are arranged in a relatively fixed mode. The hot melting device is arranged on the side face of the manufacturing device. Cloth is fed into the serging device by the feeding device. Primary double-side serging is carried out on the cloth fed by the feeding device by the serging device. Secondary double-side serging is carried out on the cloth by the manufacturing device after the cloth discharged out of the serging device is cut off. The hot melting device carries out hot melting on the cloth discharged out of the manufacturing device. According to the towel machine with the high product quality, mechanical automation replaces the original manual operation to produce towels, the labor intensity of workers is lowered, product production efficiency is stably improved, production cost is lowered, production can be effectively managed, and practical high production requirements are met.

The invention discloses numerical-control sewing processing equipment. The numerical-control sewing processing equipment comprises a sewing machine, a sewing-material clamping and towing mechanism, two parallel sliding rails at the upper layer, two parallel sliding rails at the lower layer and a numerical-control center. The numerical-control sewing processing equipment disclosed by the invention has the advantages that not only can the sewing of multi-layer sewing materials, multiple stitches and multiple layer patterns be realized, but also the working efficiency is improved; the production cost is lower, the installation and the debugging are simple, and the repair and the maintenance of the sewing machine are easy.

The invention discloses an automatic seam abutting device for cutting pieces and a seam abutting method of the automatic seam abutting device. The automatic seam abutting device comprises a machine table, a control device, an air sucking device, a stamper device, a positioning device, a feeding device and a sewing device, wherein the air sucking device is provided with a plurality of air sucking holes, and the air sucking holes are formed in a table surface of the machine table; the stamper device is provided with at least one pressing arm and a stamper driving device for driving the pressing arm to move; the positioning device is provided with at least one positioning arm and a positioning driving device for driving the positioning arm to move; the air sucking device, the stamper device, the positioning device, the feeding device and the sewing device are connected to the machine table, and the air sucking device, the stamper driving device, the positioning driving device, the feeding device and the sewing device are electrically connected to the control device. The automatic seam abutting device for the cutting pieces involved by the invention is suitable for the seam abutting technology of most collars, the requirements for the skills of workers are greatly lowered, and the production efficiency is improved.

The invention provides a thread trimming and presser foot raising driving device of a sewing machine. The technical problems that thread trimming, thread loosening and presser foot raising are implemented by two existing thread trimming and presser foot raising driving devices, the cost is high, occupied space is large, noises are large, mounting time is long, and mounting is not facilitated are solved. The thread trimming and presser foot raising driving device of the sewing machine comprises a stepping motor, a shifting fork mechanism and a cam, wherein the shifting fork mechanism comprises a shifting rod, a fork rod, a sliding rod and at least two fixing rings; one end of the shifting rod and the cam are fixed on a spindle of the stepping motor; the other end of the shifting fork can extend in the fork rod and drives the fork rod to move; the fork rod is fixed on the sliding rod; the sliding rod is positioned in the two fixing rings and can slide in the fixing rings; and a movement trace of the cam and a free end of a presser foot raising connecting rod of the sewing machine are intersected. A lower thread trimming device and a thread slacking device are driven to perform thread trimming, thread clamping and thread slacking through the shifting fork mechanism, and presser foot raising is implemented through the cam.

The invention provides a sewing machine. The sewing machine comprises a main shaft, a material feeding mechanism, a presser foot lifting mechanism, a driving motor, a needle pitch adjusting power transmission mechanism and a presser foot lifting transmission mechanism, wherein the material feeding mechanism is provided with a material feeding swinging seat; the needle pitch adjusting power transmission mechanism enables power transmission to continuously exist between the driving motor and the material feeding swinging seat; a collision avoidance structure is arranged in the presser foot lifting transmission mechanism; a corner of an output shaft of the driving motor is provided with a needle pitch active adjusting area and a presser foot lifting area; when the output shaft of the drivingmotor operates within the needle pitch active adjusting area, the sewing machine is provided with effective needle pitch; the collision avoidance structure enables no power transmission to exist between the driving motor and a presser foot lifting mechanism; when the output shaft of the driving motor operates within the presser foot lifting area, the presser foot lifting transmission mechanism enables power transmission to exist between the driving motor and the presser foot lifting mechanism; and the absolute value of a needle pitch corresponding to an angle of the material feeding swinging seat is not larger than a maximum absolute value of the effective needle pitch. According to the sewing machine, timely response, suspended seam and very good needle pitch adjusting stability of the needle pitch adjusting mechanism are realized.

A sewing machine capable of sewing while a workpiece cloth is moved by a manual operation includes a needlebar having a lower end to which a sewing needle is attached, a needlebar driving mechanism vertically driving the needlebar via a main shaft, a presser foot pressing the workpiece cloth, an imaging device imaging at least an area of the workpiece cloth near to the sewing needle, a movement amount operating device obtaining by operation a movement amount of the workpiece cloth based on image data supplied from the imaging device, a setting device setting a stitch pitch on the workpiece cloth, a comparing device comparing the obtained movement amount of the workpiece cloth and the set stitch pitch, a cloth movement limiter limiting movement of the workpiece cloth by the manual operation, and a control device controlling the cloth movement limiter according to a result of comparison.

The invention discloses a sewing feeding device and method and a sewing device. The sewing feeding device comprises a bench, a bypass mechanism, a suction mechanism, a compressing mechanism, a transmission mechanism and a drive mechanism, wherein the mechanisms are disposed on the bench. The bypass mechanism is adjacent to the suction mechanism. The compressing mechanism is slidably connected to the transmission mechanism; a projection of the compressing mechanism on the bench at least partly overlaps with the bypass mechanism or an extension of the bypass mechanism. The drive mechanism is connected with the compressing mechanism. After placed, a cut panel is automatically fed below a needle of a sewing machine and sewed, with no need for manual operations; labor is reduced, and labor cost is reduced. Through the application of the sewing device, production efficiency can be improved.

The invention provides a cloth feeding mechanism for a sewing machine, and belongs to the technical field of sewing machines. The problems of complexity in an upward-downward comprehensive cloth feeding structure and high manufacturing cost of the prior art are solved. The cloth feeding mechanism for the sewing machine comprises a main shaft, a needle bar, a pressure bar and a cloth feeding tooth driving shaft for driving a cloth feeding tooth to move, wherein an outer presser foot is fixedly connected to the lower end of the pressure bar. The cloth feeding mechanism also comprises an inner presser foot and a presser foot connecting rod, wherein the inner presser foot is fixedly connected to the lower end of the presser foot connecting rod; the needle bar is connected to the presser foot connecting rod, and can slide up and down on the presser foot connecting rod; the needle bar is radially fixed relative to the presser foot connecting rod; a forward-backward swinging mechanism capable of driving the presser foot connecting rod to swing forwards and backwards when the main shaft rotates is arranged between the presser foot connecting rod and the main shaft; an upward-downward movement mechanism capable of driving the presser foot connecting rod to move upwards and downwards when the main shaft rotates is also arranged between the presser foot connecting rod and the main shaft. The cloth feeding mechanism has the advantages of simple structure, low manufacturing cost and the like.

The invention discloses an automatic free-ironing pocket patching machine. The automatic free-ironing pocket patching machine comprises a main sewing mechanism, a material-receiving transmission mechanism, a pressing mechanism, an automatic edging mechanism, a towing mechanism and a discharging mechanism, wherein the material-receiving transmission mechanism is positioned on the side surface of the main sewing mechanism; the pressing mechanism is positioned below the material-receiving transmission mechanism; the automatic edging mechanism is positioned on the side surface of the pressing mechanism; the towing mechanism is positioned on the other side surface of the pressing mechanism; the discharging mechanism is positioned below the towing mechanism; the towing mechanism and the discharging mechanism form a material-collecting mechanism. The automatic free-ironing pocket patching machine achieves automation of feeding, free ironing, edging, sewing, discharging and other working processes, and is low in cost and high in efficiency.

The invention provides a cloth thickness detection device of a sewing machine, belongs to the technical field of sewing, and solves the problems of high requirements on installation environment and poor detection accuracy by a traditional cloth thickness detection device. The cloth thickness detection device of the sewing machine comprises a rotary arm, a sensor device and an upper pinch roller installation seat, wherein the upper pinch roller installation seat is provided with an upper pinch roller; the upper pinch roller is rotatably installed on the upper pinch roller installation seat through a first rotation shaft, the lower end surface of the upper pinch roller extends out of the lower end surface of the upper pinch roller installation seat; the middle of the rotary arm is installed on the head of the sewing machine through a hinge pin, and the rotary arm swings around the hinge pin; the upper pinch roller installation seat is connected with the lower end of the rotary arm through a transmission structure; the transmission structure can drive the rotary arm to swing around the hinge pin; the sensor device is connected with the upper end of the rotary arm, can detect the information of the amplitude of swing of the rotary arm and sends the information of the amplitude of swing to a sewing machine electronic controller. The cloth thickness detection device of the sewing machine has the advantages of simple structure, convenience in installation and high detection accuracy.

The invention belongs to the technical field of sewing machines, and particularly relates to a sewing machine based on an automatic template split synchronizing wheel apparatus. The sewing machine comprises a sewing machine body, the sewing machine body is provided with a drag wheel lifting and pressing mechanism and a lifting and pressing foot mechanism. A housing rear cover plate of the sewing machine body is provided with a lifting and pressing drag wheel electromagnet, a lifting and pressing foot electromagnet is disposed in the housing, and the lifting and pressing drag wheel electromagnet and the lifting and pressing foot electromagnet are used for respectively controlling the drag wheel lifting and pressing mechanism and the lifting and pressing foot mechanism to act. At the same time, a knee-operated lifting push rod is used for individually controlling the drag wheel lifting and pressing mechanism to act, so that the lifting height of a drag wheel can be adjusted at will, a cloth-dragging wheel can be lifted from a presser when a corner is sewed, and the presser can always pressed the cloth, the cloth can be normally sewed, the sewing performance can be raised, and the sewing effect can be ensured.

The invention provides a sewing material detecting device for a sewing machine. The sewing machine comprises a machine head and a table plate. The sewing material detecting device for the sewing machine is characterized in that the sewing material detecting device comprises a mounting plate, a circuit board and a sewing material thickness detector, the mounting plate is fixed to the machine head, the circuit board and the sewing material thickness detector are fixed on the mounting plate, the circuit board comprises a micro-control unit, the sewing material thickness detector exactly faces the table plate, and the sewing material thickness detector is connected with the micro-control unit through the circuit board. The sewing material detecting device for the sewing machine is mounted on the machine head of the sewing machine, the thickness of sewing materials to be sewn on the table plate of the sewing machine can be accurately detected through the sewing material thickness detector and the micro-control unit, the lifting height of presser feet is adjusted accurately according to the detected thickness of the sewing materials, a strong basis is provided for the adjustment of the lifting height of the presser feet, and accurate full automatic control over the sewing machine can be ensured.

To achieve the efficiency in the sewing work in a sewing machine having a thread cutting mechanism, a presser lifter mechanism and a thread sweeping mechanism by checking the operation of the presser lifter mechanism as required while preventing the delay in the cycle time simplifying the mechanisms and the controls. The sewing machine has the thread cutting mechanism 10, the presser lifter mechanism 30, the thread sweeping mechanism 50 and a drive means for driving the mechanisms is provided with the first cam 61 which has a thread cutting operation part for converting rotary driving forces of a single pulse motor 80 as the drive means to those to match the thread cutting mechanism 10 and the second cam 62 which has a thread sweeping operation part and a presser lifting operation part for converting rotary driving forces of the pulse motor 80 to those to match the thread sweeping mechanism and the presser lifter mechanism. The first cam and the second cam are arranged in such a phase difference as to operate the thread cutting mechanism, the thread sweeping mechanism and the presser lifter mechanism sequentially with the rotation of the pulse motor.

A clutch structure for a presser foot in an embroidery sewing machine is provided. The clutch structure includes a guide member, to which the presser foot drive link is rotatably connected, and through which the needle bar guide shaft passes, a spring connecting member mounted on the outer circumference of the needle bar guide shaft and inside the guide member, a resilient member mounted on the outer periphery of the spring connecting member, and a pivot member mounted inside the guide member so as to be pivotable around the needle bar guide shaft within a certain angular range by the height adjusting mechanism and the resilient member. Upon a head-interval adjusting operation, the unnecessary driving of the presser foot is prevented, so that the occurrence of vibrations and noise as well as the unnecessary wear of a needle bar, a presser foot support, and a presser foot holder can be prevented.

The auxiliary cloth dragging mechanism for sewing machine has simple structure and raised sewing quality. Structurally, the auxiliary cloth dragging mechanism features that the main driving shaft transmits the driving force to the link rod and the connected rotary locking part of the cloth pressing wheel via the shaft in the frame and the swinging assembly so as to make the link rod and the rotary locking part reciprocate and the cloth pressing wheel rotate intermittently in one direction. The cloth pressing wheel is connected to the pressing rod in the wheel lifting and pressure regulating mechanism. The cloth pressing wheel may be lifted as required and the pressure of the cloth pressing wheel may be regulated based required cloth feeding speed. The present invention is suitable for sewing machine for thick or even very thick cloth.

The invention relates to a press material structure of a pattern sewing machine, comprising a support frame, a right sliding rail and a left sliding rail connected at the support frame; an external press plate is connected with the left sliding rail through a connection plate; and sewing material is pressed tightly on a pallet in a manner that the left sliding rail moves up and down; the press material structure of the pattern sewing machine further comprises a middle press plate and a wire track assembly arranged on the external press plate; the middle press plate is connected with the wire track assembly; the wire track assembly is connected with the right sliding rail through a right connection plate; the sewing material is pressed tightly on the pallet in a manner that the right sliding rail moves up and down; the middle press plate penetrates through a cylinder connected between the middle press plate and the right connection plate after being connected with the wire track assembly; the cylinder can cause the middle press plate to move left and right; the invention has the following beneficial effects: the middle press plate can move up and down to press the sewing material and can move left and right at work via the cylinder; the sewing area is small and the material of suture is sealed, thus avoiding fixation by hand and being safe and convenient.

The invention provides a drive mechanism integrating trimming, thread slacking, routing and presser foot lifting and a sewing machine. The drive mechanism comprises a drive motor, a thread slacking shaft in transmission connection with the drive motor, a presser foot lifting transmission assembly connected with a presser foot lifting assembly, and a thread slacking transmission part connected with a thread slacking and routing assembly. The presser foot lifting transmission assembly comprises a presser foot lifting transmission rod and a presser foot lifting transmission part which are in sliding connection, the presser foot lifting transmission rod is fixedly connected with the thread slacking shaft, the presser foot lifting transmission part is connected with the presser foot lifting assembly, and the thread slacking transmission part is connected with the thread slacking shaft. One power source, namely the drive motor is adopted, so that the drive mechanism is simplified; meanwhile, the drive motor can control movement positions more accurately, routing and thread slacking actions and presser foot lifting and thread slacking actions are more accurate, and adjustment is more convenient.

The invention relates to the technical field of sewing machines, in particular to a thread trimming/loosening foot-lifting/pressing device for a sewing machine, and the sewing machine comprising the device. The device comprises a power member, a cam structure, a thread trimming driving crankshaft, and an ejector rod, wherein the cam structure rotates under the driving of the power member, and is provided with a first driving contour surface and a second driving contour surface; the thread trimming driving crankshaft is connected with a thread trimming mechanism, a first transmission pin is arranged on the thread trimming driving crankshaft and is matched with the first driving contour surface, and the first driving contour surface is provided with a thread trimming driving section for driving the thread trimming mechanism to execute a thread trimming operation; a second transmission pin is arranged at one end of the ejector rod, and the other end is connected with a thread loosening mechanism and a foot lifting/pressing mechanism, the second transmission pin is matched with the second driving contour surface, and the second driving contour surface is provided with a thread loosening driving section for driving the thread loosening mechanism to execute the thread loosening operation and a foot lifting/pressing driving section for driving the foot lifting/pressing mechanism to execute the operation of lifting/pressing the foot. And three functions of thread trimming, thread loosening and foot lifting/pressing are realized through one power member.

The invention relates to a combined adjustment method for adjusting stitch length of a sewing machine and height of a presser foot. The sewing machine comprises a controller, a power source, an electronic control element and a driving crank. The electronic control element and the power source are electrically connected with the controller; the driving crank is connected to the power source and isselectively connected with a stitch length adjustment or a presser foot lift. The combined adjustment method comprises allowing the controller to control the electronic control element to operate; allowing the electronic control element to drive the driving crank to selectively connect to the stitch adjustment or the presser foot lift, thereby adjusting the stitch length of the sewing machine or the height of the presser foot. The combined adjustment method allows the stitch length of or the height of the presser foot to be adjusted through one power source; therefore, production cost can be reduced, and it is convenient to maintain the sewing machine.

The invention relates to a large-sized mineral wool machine, which is applicable to places with high consumption of mineral wools, rough sewing materials and poor work environments and comprises a main transmission and frame structure, a sewing operation surface, a pricking material transmission mechanism, a feeding adjusting component, a thread passing component, an eccentric wheel mechanism and an expansion material rolling mechanism. The sewing operation surface is provided with an operating plate and a moving connecting rod, the pricking material transmission mechanism is provided with a needle seat, the expansion material rolling mechanism is adjacent to the feeding adjusting component, the thread passing component is mounted at the rear end of the feeding adjusting component, the main transmission and frame structure is adjacent to the feeding adjusting component and is located on the other side, the eccentric wheel mechanism is mounted on one side of the main transmission and frame structure, the pricking material transmission mechanism is mounted below the main transmission and frame structure and is fixed on a frame, the sewing operation surface is mounted above the main transmission and frame mechanism, the needle seat of the pricking material transmission mechanism is located between the operating plate and the moving connecting rod, and a support of the sewing operation surface is mounted on the other side of the main transmission and frame structure. Various materials such as asbestos, rock wool, metal, plastics and the like can be used as sewing materials and sewing threads.

The invention provides an integrated presser foot lifting and thread trimming device. The integrated presser foot lifting and thread trimming device comprises a presser foot lifting drive mechanism, a thread trimming drive mechanism, a power source, a rotatable coupling shaft, a presser foot lifting driving assembly, a presser foot lifting drive wheel connected with the presser foot lifting drive mechanism, a thread trimming driving assembly as well as a thread trimming drive wheel connected with the thread trimming drive mechanism; when the power source drives the coupling shaft to rotate forwards, the presser foot lifting driving assembly is abutted against the presser foot lifting drive wheel and drives the presser foot lifting drive wheel to rotate to enable the presser foot lifting drive mechanism to act, and the thread trimming driving assembly is separated from the thread trimming drive wheel; when the power source drives the coupling shaft to rotate reversely, the presser foot lifting driving assembly is separated from the presser foot lifting drive wheel, and the thread trimming driving assembly is abutted against the thread trimming drive wheel and drives the thread trimming drive wheel to rotate to enable the thread trimming drive mechanism to act. According to the integrated presser foot lifting and thread trimming device, a foot lifting action and a thread trimming action can be realized in a time-sharing manner only through one power source, so that the overall structure is more compact, the cost of a sewing machine is reduced effectively, and the attractiveness of the sewing machine can be improved.