CN218059467U - Thread breakage self-locking device for sewing machine - Google Patents

Abstract

The utility model discloses a broken string self-lock device for sewing machine, including the sewing machine, including a motor, an end cap, a controller, and a cover plate, the drum, syringe needle and cotton rope, the hollow formation in the sewing machine holds the cavity, be provided with broken string self-lock device in the sewing machine, thereby broken string self-lock device is used for opening through whether the response cotton rope breaks and stops control motor, broken string self-lock device sets up in the sewing machine inside holds the cavity, broken string self-lock device includes the circuit of swing subassembly and control motor work, the swing subassembly is set up to be used for the closed switch of control circuit, the swing subassembly includes the connecting rod, the swing wheel, balance and connecting rod, still be provided with the pulley on the sewing machine, the pulley sets up respectively in the open end that holds the cavity, two pulleys are used for walking the line and are configured as the conductor partly in the circuit, the sewing machine during operation, the swing balance passes through the traction force of cotton rope and removes to the position all tangent with two pulleys, make the circuit constitute the return circuit, during broken string, the swing resets, the circuit is opened circuit self-lock device work.

Description

Thread breakage self-locking device for sewing machine

Technical Field

The utility model relates to a sewing machine technical field, in particular to broken string self-lock device for sewing machine.

Background

The sewing machine is the indispensable equipment in the clothing manufacturing process, can take place the broken string in the sewing machine use, can take place the empty needle at broken string or the in-process that the operator took place the broken string, because the empty needle can lead to the sewing material to be pierced by the needle machine, leaves the pinhole, consequently need be equipped with on the sewing machine and can in time monitor the broken string and order about the device of shutting down.

The existing sewing machine thread breakage detection device mainly comprises two types: one is mechanical structure detection, whether the thread is broken or not is detected by measuring the tension of the thread, and most of the existing mechanical structure type detection devices have the defect of complicated structure; the other type is that the optical sensor is adopted to directly detect the sewing thread, but the optical sensor is easily influenced by oil stains and fluff, and the detection mode often has a false alarm phenomenon, so that a device which has a simple structure and can effectively detect the thread breakage of the sewing machine is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a broken string self-lock device for sewing machine to how to accomplish the sewing machine broken string self-lock problem through simple device that provides in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a broken string self-lock device for sewing machine, including sewing machine, motor to the syringe needle provides power, set up in the drum of sewing machine side, set up syringe needle and the cotton rope on sewing machine, the hollow formation of sewing machine inside holds the cavity, be provided with broken string self-lock device in the sewing machine, thereby broken string self-lock device is used for opening through the control motor that whether the response cotton rope splits and stops, broken string self-lock device sets up in the inside cavity that holds of sewing machine, broken string self-lock device includes the circuit of swing subassembly and control motor work, the swing subassembly is set up to be used for the closed switch of control circuit, the swing subassembly includes the connecting rod, the swing wheel, wobble plate and connecting rod, the connecting rod is used for fixed connection swing wheel and holds the cavity, the connecting rod is used for connecting swing wheel and wobble plate.

Preferably, the accommodating chamber is an open chamber, the sewing machine is further provided with two pulleys, the two pulleys are respectively arranged at the open end of the accommodating chamber, the two pulleys are used for wiring and are configured to be conductors as part of a circuit, and when the sewing machine works, the swinging disc moves to a position tangent to the two pulleys through the traction force of the thread rope, so that the circuit forms a loop.

Preferably, the port of the accommodating chamber is provided with a rotating shaft, the pulley is fixedly connected to the accommodating chamber through the rotating shaft, and the pulley can rotate freely through the rotating shaft when the thread is sewn and laid.

Preferably, the tail end of the connecting rod is provided with a rotating shaft, the swinging wheel is sleeved outside the rotating shaft, the connecting rod is fixedly connected with the swinging wheel, the rotating shaft is arranged at one end, away from the swinging wheel, of the connecting rod, and the swinging disc is sleeved outside the rotating shaft.

Preferably, the pulley near one side of the connecting rod is configured as a wire inlet end, the pulley far away from one side of the connecting rod is configured as a wire outlet end, and the wire enters through the wire inlet end and is wound on the wobble plate to be led out from the wire outlet end.

Preferably, the surfaces of the swinging disc and the pulley are provided with grooves for placing the ropes.

The technical effect and the advantage of the utility model, through the traction force of needle to the cotton rope during sewing of sewing machine, the cotton rope twines on the wobble plate simultaneously, the cotton rope will drive the wobble plate swing as for the pulley contact, by the wobble plate this moment, pulley and power constitute circuit return circuit, the work of motor control syringe needle, when the cotton rope is cracked, the cotton rope disappears to the traction force of wobble plate, the wobble plate resets through self action of gravity, there is the clearance in wobble plate and the pulley this moment, by the wobble plate, pulley and power constitute the circuit and open a way, the motor auto-lock, will no longer work, this broken string self-lock device simple structure, install in the sewing machine hold the inside department of cavity can, accomplish through self action of gravity and reset, response speed is fast.

The pulley rotates clockwise through setting up the pivot on holding the cavity inner wall, and the recess that is used for placing the cotton rope that its surface set up can guarantee when balance and pulley contact, can not influence the cotton rope and slide, and the setting of pulley can be better makes things convenient for the cotton rope to slide simultaneously, and the swing subassembly passes through pivot interconnect, and the cover is located the epaxial connecting rod of commentaries on classics and is connected with the pivot rotation, and the frictional force of its contact surface is less, can improve disconnected self-lock device's response speed, guarantees its sensitivity.

Drawings

Fig. 1 is a schematic structural view of the thread breakage self-locking device for the sewing machine of the present invention.

Fig. 2 is a schematic structural view of the broken wire self-locking device of the present invention.

Fig. 3 is a side view of the wobble plate of the present invention.

In the figure: 1. a sewing machine; 2. wire coils; 3. a needle head; 4. a cord; 5. a wire breakage self-locking device; 6. a connecting rod; 7. a swinging wheel; 8. placing a plate; 9. a connecting rod; 10. a pulley; 11. a rotating shaft; 12. and (6) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model provides a as shown in fig. 1-3 a sewing machine is with disconnected line self-lock device, including sewing machine 1, the motor that provides power to syringe needle 3, set up in drum 2 of sewing machine 1 side, set up syringe needle 3 and cotton rope 4 on sewing machine 1, sewing machine 1 inside cavity forms and holds the cavity, be provided with disconnected line self-lock device 5 in sewing machine 1, disconnected line self-lock device 5 is used for opening and close through response cotton rope 4 fracture control motor, disconnected line self-lock device 5 sets up in sewing machine 1 inside holds the cavity, disconnected line self-lock device 5 includes the circuit of swing subassembly and control motor work, the swing subassembly is set up to be used for the closed switch of control circuit, the swing subassembly includes connecting rod 6, swing wheel 7, pendulum wheel 8 and connecting rod 9, connecting rod 6 is used for fixed connection swing wheel 7 and holds the cavity, connecting rod 9 is used for connecting swing wheel 7 and pendulum wheel 8, it sets up to plastics or non-conductive material preparation to hold the cavity, the opening has been seted up to the cavity outer wall, it has the motor to prolong the connection both ends and has the circuit of power supply, its cavity prolongs the outer wall and is provided with conductive gasket, the pulley 10, chamber 10, 10 sets up to form the power on through pivot 10 and conductive pulley 10 contact pulley, 10, the pulley, 10 contact pulley, 10, the power supply is connected to the pulley, the power supply.

The swinging assembly is fixedly connected with the inner wall of the chamber, the connecting rod 6 is vertically connected with the inner wall of the chamber through the base, the base is fixedly connected with the inner wall of the chamber through screws, the number of the connecting rods 6 is two, the end side of the connecting rod 6 far away from the base is provided with a slotted hole for installing a rotating shaft 11, the rotating shaft 11 is sleeved with a swinging wheel 7, the left side and the right side of the swinging wheel 7 are connected with connecting rods 9, one end of each connecting rod 9 far away from the swinging wheel 7 is provided with a slotted hole for installing the rotating shaft 11, a swinging disc 8 is sleeved on the rotating shaft 11 and can rotate around the rotating shaft 11, the swinging disc 8 is provided with a groove 12 for winding the thread rope 4, as each component of the swinging assembly is connected through the rotating shaft 11, the friction force at the contact surface is small, when the thread rope 4 is dragged to sew by the needle head 3, the swinging disc 8 can swing through the swinging wheel 7 and also can rotate around the swinging disc 8, the containing cavity is set to be an open cavity, the sewing machine 1 is further provided with two pulleys 10, the two pulleys 10 are respectively arranged at the open end of the containing cavity, the two pulleys 10 are used for wiring and are configured to be conductors to be used as a part of a circuit, when the sewing machine 1 works, the swinging disc 8 moves to a position tangent to the two pulleys 10 through the traction force of the cord 4, the circuit forms a loop, the sizes of the two pulleys 10 are the same, the position height of the swinging disc 8 is set to be that when the swinging disc 8 is stretched to the joint of the pulleys 10 by the cord 4, the center position of the swinging disc 8 is located on a perpendicular bisector of a center connecting line of the two pulleys 10, when the swinging disc 8 is not stressed to stand, the swinging disc 8 naturally stands through self gravity, and the length of the connecting rod 6 is smaller than the sum of the radius lengths of the swinging disc 8 and the pulleys 10.

This practical theory of operation: the utility model relates to a sewing machine is with disconnected line self-lock device, 4 one ends of cotton rope twine in drum 2, one end is driven by 1 syringe needle 3 of sewing machine in addition, 4 terminal concatenations of cotton rope are in pulley 10 and balance 8, at first by the leading-in cotton rope 4 of pulley 10 who sets up in the cavity top, 4 clockwise twine on pulley 10 of cotton rope, then anticlockwise around balance 8 a week back, clockwise in the pulley 10 roll-off of cavity below pegs graft in syringe needle 3, when preparing the sewing cloth, manual pulling cotton rope 4, 4 atress of cotton rope drive balance 8 back move to with pulley 10 laminating, disconnected line self-lock circuit forms the route this moment, the motor lasts the work, when midway disconnected line, balance 8 is owing to not receive behind the traction force of cotton rope 4, self action of gravity resets to the state of stewing, disconnected line self-lock circuit forms and opens circuit, control motor stop work.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. The utility model provides a broken string self-lock device for sewing machine, includes sewing machine (1), provides the motor of power, sets up in drum (2) of sewing machine (1) side, sets up syringe needle (3) and cotton rope (4) on sewing machine (1) to syringe needle (3), and the inside cavity of sewing machine (1) forms and holds the cavity, its characterized in that: be provided with broken string self-lock device (5) in sewing machine (1), thereby broken string self-lock device (5) are used for opening through the control motor of whether fracture of response cotton rope (4) and open and stop, broken string self-lock device (5) set up in sewing machine (1) inside chamber that holds, broken string self-lock device (5) are including the circuit of swing subassembly and control motor work, the swing subassembly is set up to be used for the closed switch of control circuit, the swing subassembly includes connecting rod (6), swinging wheel (7), balance (8) and connecting rod (9), connecting rod (6) are used for fixed connection swinging wheel (7) and hold the chamber, connecting rod (9) are used for connecting swinging wheel (7) and balance (8).

2. The thread breakage self-locking device for the sewing machine according to claim 1, characterized in that: the containing chamber is arranged to be an open chamber, the sewing machine (1) is further provided with two pulleys (10), the two pulleys (10) are respectively arranged at the open end of the containing chamber, the two pulleys (10) are used for wiring and are configured to be conductors to serve as a part of a circuit, and when the sewing machine (1) works, the swinging disc (8) moves to a position tangent to the two pulleys (10) through the traction force of the thread rope (4), so that the circuit forms a loop.

3. The thread breakage self-locking device for the sewing machine according to claim 2, characterized in that: the port of the accommodating chamber is provided with a rotating shaft (11), and the pulley (10) is fixedly connected to the accommodating chamber through the rotating shaft (11) and freely rotates through the rotating shaft (11) when the thread is sewn and laid.

4. The thread breakage self-locking device for the sewing machine according to claim 3, characterized in that: connecting rod (6) end is provided with pivot (11), outside pivot (11) were located to oscillating wheel (7) cover, connecting rod (9) and oscillating wheel (7) fixed connection, oscillating wheel (7) one end is kept away from in connecting rod (9) is provided with pivot (11), pivot (11) are located to wobble plate (8) cover outside.

5. The thread breakage self-locking device for the sewing machine according to claim 4, characterized in that: the pulley (10) close to one side of the connecting rod (6) is configured as a wire inlet end, the pulley (10) far away from one side of the connecting rod (6) is configured as a wire outlet end, and the wire rope (4) enters through the wire inlet end and is wound on the swinging disc (8) and then is led out from the wire outlet end.

6. The thread breakage self-locking device for the sewing machine according to claim 5, characterized in that: grooves (12) for placing the thread ropes (4) are formed in the surfaces of the swinging disc (8) and the pulley (10).

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