CN112281330B - Single-double needle sewing state switching device and method of sewing machine - Google Patents
Single-double needle sewing state switching device and method of sewing machine Download PDFInfo
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- CN112281330B CN112281330B CN201910671189.XA CN201910671189A CN112281330B CN 112281330 B CN112281330 B CN 112281330B CN 201910671189 A CN201910671189 A CN 201910671189A CN 112281330 B CN112281330 B CN 112281330B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/10—Needle bars for multiple-needle sewing machines
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
- D05B69/04—Manual drives
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- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to the technical field of sewing machines, in particular to a single-double-needle sewing state switching device and method of a sewing machine, which are used for solving the technical problems that in the prior art, the accuracy is not high when an operator manually operates the sewing machine and a higher sewing technology is required. The single-double needle sewing state switching method of the sewing machine comprises the operation steps of judging whether the operation parameters of the sewing machine meet the first migration conditions when the sewing machine is in the double-needle sewing state, and enabling the reset mechanism to control the sewing machine to automatically switch from the double-needle sewing state to the single-needle sewing state through the relation between the operation parameters of the sewing machine and the first migration conditions.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a single-needle and double-needle sewing state switching device and method of a sewing machine.
Background
Sewing machines are machines that interweave or stitch one or more layers of stitching material by forming one or more stitches on the stitching material with one or more stitching threads, and can be broadly classified into domestic sewing machines and industrial sewing machines. At present, when the sewing machine is in a single-needle sewing state and a double-needle sewing state, an operator is required to manually switch, so that the problem of low control precision of the moment of switching the single-needle sewing state and the double-needle sewing state exists, and meanwhile, the operator is required to pay high attention to the moment of switching the single-needle sewing state and the double-needle sewing state, so that higher requirements are put forward on the sewing technology of the operator.
Disclosure of Invention
The single-double needle sewing state switching device and method of the sewing machine are used for solving the technical problems that in the prior art, when an operator manually operates, the precision is not high and a higher sewing technology is required.
According to a first aspect of the present invention, there is provided a single-double needle sewing state switching method of a sewing machine capable of switching from a single-needle sewing state to a double-needle sewing state by controlling a reset mechanism, comprising the steps of:
step a: when the sewing machine is in a double-needle sewing state, judging whether the needle bar changing spanner is at a designated position, if so, executing the step e, and if not, executing the step b;
step b: judging whether the operation parameters of the sewing machine meet the first migration conditions, if so, stopping the sewing of the sewing machine to execute the step c, and if not, maintaining the current situation and returning to the step a;
step c: judging whether the needle bar conversion wrench is at a designated position, if so, executing the step e, and if not, executing the step d;
step d: c, starting the sewing in the double-needle sewing state again, judging whether the needle bar changing spanner is at a designated position, if so, executing the step e, and if not, maintaining the current situation and returning to the step c;
step e: the sewing machine is switched from the double-needle sewing state to the single-needle sewing state, when the sewing machine is in the single-needle sewing state, whether the operation parameters of the sewing machine meet the second migration conditions is judged, if yes, the sewing machine is switched from the single-needle sewing state to the double-needle sewing state through the reset mechanism, and if not, the current state is maintained.
In one embodiment, when the sewing machine is in a double-needle sewing state, whether the needle bar changing spanner is at a specified position is judged by the needle bar changing spanner position sensor.
In one embodiment, the first migration condition is a number of stitches to achieve a predetermined double stitch sewing, and the second migration condition is a number of stitches to achieve a predetermined single stitch sewing.
In one embodiment, the designated position is a left position or a right position of the shank shifting wrench;
wherein the left position corresponds to a single-needle sewing state in which a left needle of the sewing machine is stopped and a right needle is sewn; the right position corresponds to a single needle sewing state in which the right needle of the sewing machine is stopped and the left needle is sewn.
In one embodiment, the operating parameter is the number of stitches completed by the sewing machine.
According to a second aspect of the present invention, the present invention also provides a single-double needle sewing state switching device of a sewing machine, for switching between single-double needle sewing states by adopting the single-double needle sewing state switching method of the sewing machine, comprising:
a needle bar changing wrench corresponding to a single needle sewing state of the sewing machine when the needle bar changing wrench is positioned at a left position or a right position; and
and a reset mechanism for moving the needle bar changing spanner from the left position or the right position to the middle position, so that the sewing machine is switched from a single-needle sewing state to a double-needle sewing state.
In one embodiment, the reset mechanism comprises:
a release lever which is interlocked with the needle bar conversion wrench when the needle bar conversion wrench is located at a left position or a right position; when the needle bar changing spanner is positioned at the middle position, the unlocking rod is not locked with the needle bar changing spanner; and
and a reset solenoid connected to the release lever, the reset solenoid being configured to pull the release lever to move in a direction away from the needle bar conversion wrench, so that the release lever is unlocked from the needle bar conversion wrench, and the needle bar conversion wrench is moved from a left position or a right position to an intermediate position.
In one embodiment, further comprising:
a needle bar conversion wrench position sensor for detecting whether the needle bar conversion wrench is located at a left position or a right position; and
the needle bar change spanner position change mechanism comprises a change rod shaft, one side of the change rod shaft is connected with the end part of the needle bar change spanner, the other side of the change rod shaft is provided with a change arm, and the change arm is connected with the needle bar change spanner position sensor through a fixing plate.
According to a first aspect of the present invention, there is provided a single-double needle sewing state switching device of a sewing machine,
compared with the prior art, the invention has the advantages that:
(1) The reset mechanism controls the sewing machine to automatically switch from the single-needle sewing state to the double-needle sewing state through the relation between the operation parameters of the sewing machine and the second migration conditions, and because electronic control is adopted, an operator does not need to pay attention to the moment of single-needle and double-needle switching, so that the sewing precision is higher, and the operator does not need a high-level sewing technology.
(2) When the operation parameters of the sewing machine meet the first migration conditions, the sewing machine pauses, so that a certain reaction time is reserved for an operator, and quality problems caused by the fact that the speed of the sewing machine is too high are avoided; meanwhile, the device can also play a certain role in protecting all mechanisms of the sewing machine.
(3) Before the operation parameters of the sewing machine do not meet the first migration conditions, the single-needle sewing can be performed by switching the needle bar changing spanner, and after the sewing machine meets the first migration conditions, the sewing can be performed again until the place where the single needle is required to be switched is switched, so that the sewing of the sewn object is completed according to the operation of a user when the sewing object is different from the set needle number.
(4) The sewing state of the sewing machine is selected by judging the position of the needle bar changing spanner, so that the operation parameters of the sewing machine can be self-defined and set in cooperation with the sewing conditions, and the use convenience of the sewing machine is improved.
Drawings
FIG. 1 is a flow chart of a method for switching the sewing state of a single needle and a double needle of a sewing machine according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of forming a straight suture in an embodiment of the present invention;
FIG. 3 is a schematic illustration of the formation of an angular seam in an embodiment of the invention;
FIG. 4 is a schematic perspective view of a single-needle and double-needle sewing device of a sewing machine according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the sewing machine according to the embodiment of the present invention, as seen from the other side of the single-needle or double-needle sewing device;
fig. 6 is a schematic perspective view of a single-needle and double-needle sewing device of a sewing machine according to an embodiment of the present invention.
Reference numerals:
100-a reset mechanism; 1-resetting a solenoid; 2-a metal plate; 3-a release lever; 14-a restoring spring;
8-a needle bar conversion wrench; 11-a limiting part; 13-an indicator plate; 15-indicating grooves; 17-a conversion plate;
7-a needle bar changing spanner position sensor; 5-left and right position detecting magnets;
300-a position changing mechanism of a needle bar changing spanner; 10-a shift lever shaft; 4-transforming arms; 9-a fixing plate; 12-a retention spring; 6-holding a spring base.
Detailed Description
Examples of the embodiments are described in detail below with reference to the drawings. In each of the drawings used in the following description, the scale is appropriately adjusted to adjust each component to a size that can be recognized.
According to a first aspect of the present invention, a single-double needle sewing state switching method of a sewing machine of the present invention includes: the sewing machine can be switched from a single-needle sewing state to a double-needle sewing state by controlling the reset mechanism, and specifically comprises the following steps.
Step a: and c, judging whether the needle bar changing spanner is at a designated position when the sewing machine is in a double-needle sewing state, if so, executing the step e, and if not, executing the step b.
Step b: judging whether the operation parameters of the sewing machine meet the first migration conditions, if yes, stopping sewing of the sewing machine to execute the step c, and if not, maintaining the current situation and returning to the step a.
Step c: and (d) judging whether the needle bar conversion wrench is at the designated position, if so, executing the step e, and if not, executing the step d.
Step d: and c, starting the sewing in the double-needle sewing state again, judging whether the needle bar changing spanner is at a designated position, if so, executing the step e, and if not, maintaining the current situation and returning to the step c.
Step e: the sewing machine is switched from the double-needle sewing state to the single-needle sewing state, when the sewing machine is in the single-needle sewing state, whether the operation parameters of the sewing machine meet the second migration conditions is judged, if yes, the sewing machine is switched from the single-needle sewing state to the double-needle sewing state through the reset mechanism, and if not, the current state is maintained.
In the step a, whether the sewing machine is switched from the double-needle sewing state to the single-needle sewing state is based on whether the needle bar changing spanner is at the designated position. In other words, if the needle bar changing spanner is at the specified position, the operation of switching the sewing machine from the two-needle sewing state to the one-needle sewing state is performed. Specifically, the sewing machine can be switched from a double-needle sewing state to a single-needle sewing state by manual operation of an operator.
Illustratively, the operating parameter of the sewing machine is the number of stitches completed by the sewing machine. The first migration condition is the number of needles reaching a preset double needle sewing.
Further, the second migration condition is the number of stitches reaching a preset single stitch sewing. In other words, when the number of needles completed by the sewing machine reaches a preset number of needles for single-needle sewing (for example, 10 needles), the sewing machine is switched from the single-needle sewing state to the double-needle sewing state by the reset mechanism. That is, the sewing machine is switched between the single-needle sewing state and the double-needle sewing state in an electronic control mode so as to meet the requirements of higher precision and lower sewing skills.
Therefore, the invention can carry out the self-defined setting of the operation parameters of the sewing machine according to the migration condition by adding the step of judging the state of the needle bar changing spanner, thereby leading the operation of the sewing machine to be more intelligent and more convenient.
The method of the present invention will be described in detail below taking the operating parameters of the sewing machine as an example of the number of needles completed by the sewing machine.
As shown in fig. 1, the sewing machine is in a double-needle sewing state before starting sewing.
Step 1001 is performed after the start.
In step 1001, the sewing machine performs sewing in a double-needle sewing state.
Step 1002, judging whether the shank-changing wrench is at a designated position, if so, executing step 1008; if not, the sewing machine remains in the current state and executes step 1003.
Step 1003, judging whether the operation parameters of the sewing machine meet the first migration condition, namely, whether the preset number of double-needle sewing needles is reached, if yes, executing step 1004, if not, maintaining the current situation and returning to step 1001.
By setting the first migration condition, the sewing machine can pause sewing when the sewing machine reaches the preset needle number for double-needle sewing, so that the problem that the sewing machine cannot be stopped at a designated node in time when the sewing machine runs rapidly can be prevented, and a certain reaction time is reserved for operators; meanwhile, the device plays a certain role in protecting all mechanisms of the sewing machine.
At step 1004, the sewing machine pauses the sewing.
Step 1005, judging whether the needle bar changing wrench is at a designated position after the sewing machine pauses sewing, if so, executing step 1008; if not, go to step 1006.
For example, the needle bar changing spanner position sensor can be used for judging whether the needle bar changing spanner is at the designated position or not. The designated position is the left position or the right position of the pointer rod changing spanner. Wherein, the left position corresponds to a single needle sewing state that the left needle of the sewing machine stops and the right needle is sewn; the right position corresponds to a single needle sewing state in which the right needle of the sewing machine is stopped and the left needle is sewn.
Specifically, the needle bar shifting wrench may be brought into either a left or right position by manual operation by an operator. If the needle bar changing wrench is located at the left position or the right position, it corresponds to the state of the single needle sewing of the sewing machine, so that the sewing machine performs step 1008.
Step 1006, sewing in a double needle sewing state is started again.
Step 1007, judging again whether the shank-changing wrench is at the designated position, if so, executing step 1008; if not, the status is maintained and the process returns to step 1005.
Step 1008, the sewing machine switches from a two-needle sewing state to a single-needle sewing state.
In step 1009, the sewing machine performs sewing in a single needle sewing state.
Step 1010, when the sewing machine is in a single-needle sewing state, judging whether the operation parameters of the sewing machine meet a second migration condition, namely whether the preset number of single-needle sewing needles is reached, if so, executing step 1011; if not, return to step 1009.
In step 1011, the sewing machine switches from the single-needle sewing state to the double-needle sewing state by the reset mechanism, and performs sewing in the double-needle sewing state.
The embodiment shown in fig. 2 is a straight suture. Wherein, through step 1001 and step 1011, a double needle suture is formed, and through step 1008, a single needle suture is formed, and when step 1010 goes to step 1011, the sewing machine can be automatically switched from a single needle sewing state to a double needle sewing state by adopting an electronic control mode so as to improve the precision thereof. When the process proceeds to step 1008 at step 1002, the operator may manually switch the sewing machine from the two-needle sewing state to the single-needle sewing state.
Thus, the single-needle sewing and the double-needle sewing can be freely combined, and the original sewing process divided into two times can be completed at one time.
The double-needle sewing state shown in fig. 2 is switched to the single-needle sewing state, and is left-needle sewing or right-needle sewing, and the present invention is not limited thereto.
The embodiment shown in fig. 3 is a corner seam forming process. Wherein a double needle suture is formed in step 1001, a single needle suture is formed in step 1008, and after the cloth is rotated, the single needle suture is continuously formed (this step is the same as step 1008, and is named step 1008' for distinction), and then the double needle suture is formed in step 1011.
As shown in fig. 3, when step 1008 and step 1008' are performed (i.e., when single needle sewing is performed), that is, when the state of single needle sewing is switched to the state of double needle sewing, the upper thread is stretched longer, and thus a phenomenon in which the thread floats easily occurs.
Therefore, in step 1008 and step 1008', if the upper thread tension of the stop needle bar shifting spanner is set to be higher than the upper thread tension in step 1001 and step 1011, the thread floating amount at the cloth rotating position can be reduced, and the occurrence of the thread floating phenomenon can be suppressed.
In the present invention, when the transition condition is satisfied and the sewing is switched to the single-needle sewing or the double-needle sewing, one or more parameters of the running speed, the presser foot pressure and the thread tension before the sewing state is changed can be automatically changed to the running speed, the presser foot pressure or the thread tension in the corresponding state along with the change of the sewing state. In other words, a change in the sewing state will correspond to an automatic change in the sewing parameters. In summary, the invention is characterized in that the sewing process is divided into a plurality of steps, the operation parameters of the sewing machine are respectively set by taking each step as a unit, and whether the next step is entered is determined by judging whether the operation parameters of the sewing machine meet the migration conditions, so that the sewing process is better controlled.
Further, the invention is characterized in that by setting the first migration condition, the sewing machine can automatically stop the sewing midway, thereby preventing other problems such as quality problems caused by too high sewing speed and protecting each mechanism of the sewing machine.
Furthermore, the invention further aims at realizing the detection of switching the single-needle sewing state to the double-needle sewing state by detecting the position of the needle bar changing spanner, so as to improve the precision and the automation efficiency and reduce the requirements on the sewing technology of operators.
According to a second aspect of the present invention, there is provided a single or double needle sewing state switching device of a sewing machine, as shown in fig. 4, which includes a needle bar changing spanner (or changing bar) 8 and a reset mechanism 100. Wherein, when the needle bar changing spanner 8 is positioned at the left position or the right position, the needle bar changing spanner corresponds to the single-needle sewing state of the sewing machine; the reset mechanism 100 is used to move the needle bar changing spanner 8 from the left position or the right position to the middle position, and switch the sewing machine from the single-needle sewing state to the double-needle sewing state.
Further, the reset mechanism 100 includes a release lever 3 and a reset solenoid 1. The unlocking lever 3 is locked with or unlocked from the needle bar changing spanner 8. Specifically, when the shank switching wrench 8 is located at the left position or the right position, the lever 3 and the shank switching wrench 8 are unlocked from each other; when the shank switching wrench 8 is located at the intermediate position, the unlocking lever 3 is unlocked from the shank switching wrench 8. As shown in fig. 4, the lock between the lever 3 and the needle bar conversion wrench 8 is released; as shown in fig. 5, the unlocking lever 3 and the needle bar conversion wrench 8 are unlocked.
In a specific embodiment, the lock is a snap lock. It will be appreciated that the locking may be other mechanical locking means, which will not be described in detail herein.
Taking the snap-locking as an example, the needle bar conversion wrench 8 is provided with a limit portion 11, wherein the limit portion 11 may be a limit screw, when the surface of the release lever 3 contacts with the surface of the needle bar conversion wrench 8, the left and right sides of the release lever 3 are respectively locked with the limit screw, when the release lever 3 is away from the needle bar conversion wrench 8, the surface thereof does not contact with the surface of the needle bar conversion wrench 8, the left and right sides of the release lever 3 are not locked with the limit screw, and the locking with the needle bar conversion wrench 8 is released.
As shown in fig. 5, the reset solenoid 1 is used to move the release lever 3, which is fixed to the metal plate 2. Specifically, when the reset solenoid 1 is connected to the release lever 3, the plunger of the reset solenoid 1 is attracted to drive the release lever 3 to move in a direction away from the needle bar conversion wrench 8, so that the lock between the release lever 3 and the needle bar conversion wrench 8 is released, and the needle bar conversion wrench 8 moves from the left position or the right position to the intermediate position due to the loss of support.
Further, when the needle bar conversion wrench 8 moves from the intermediate position to the left position or the right position, since the upper end of the release lever 3 is connected to the indication plate 13 via the return spring 14, the return solenoid 1 is not energized, and does not pull the release lever 3, the release lever 3 moves in a direction approaching the needle bar conversion wrench 8 by the return spring 14, and the release lever 3 and the needle bar conversion wrench 8 are locked, and the needle bar conversion wrench 8 is fixed at the left position or the right position.
In one embodiment, as shown in fig. 4, the single-double needle sewing state switching device of the sewing machine of the present invention further comprises a needle bar changing spanner position sensor 7 and a needle bar changing spanner position changing mechanism 300.
Wherein the needle bar changing spanner position sensor 7 is used for detecting whether the needle bar changing spanner 8 is positioned at the left position or the right position. Specifically, the needle bar changing spanner position sensor 7 is a left-right position detection sensor.
The needle bar conversion wrench position conversion mechanism 300 includes a conversion lever shaft 10 and a conversion arm 4, one side of the conversion lever shaft 10 is connected to an end portion of the needle bar conversion wrench 8, the conversion arm 4 is provided on the other side of the conversion lever shaft 10, and the conversion arm 4 is connected to the needle bar conversion wrench position sensor 7 via a fixing plate 9.
As shown in fig. 4, both ends of the change lever shaft 10 are connected to the change arm 4 and the needle bar change spanner 8, respectively, a fixing plate 9 is fixed to the change arm 4, and the right and left position detecting magnet 5 is provided to the fixing plate 9. When the position of the needle bar conversion wrench 8 is changed, the left-right position detecting magnet 5 moves synchronously with the needle bar conversion wrench 8, so that the needle bar conversion wrench position sensor 7 can detect a signal of the corresponding position.
Specifically, when the left-hand shank transfer wrench position sensor 7 is able to detect the left-right position detection magnet 5, it sends a signal to the controller that the shank transfer wrench 8 is located at the left position; when the right needle bar conversion wrench position sensor 7 can detect the right and left position detection magnet 5, it sends a signal to the controller that the needle bar conversion wrench 8 is located at the right position.
Furthermore, the shift arm 4 is provided with a shift plate 17 connected to the spring holding base 6, and the spring holding base 6 is provided with a holding spring 12, and the shift plate 17 moves synchronously with the needle bar shifting spanner 8 leftward and rearward. The needle bar changing spanner position sensor 7 may be fixed to the spring holding base 6. When the lock of the release lever 3 and the needle bar changing spanner 8 is released, the needle bar changing spanner 8 returns to the intermediate position under the action of the holding spring 12 because the needle bar changing spanner 8 loses the constraint.
As shown in fig. 6, the needle bar conversion wrench 8 is provided with a pressing portion, and an operator can change the position of the needle bar conversion wrench 8 by the pressing portion. Wherein, an indication groove 15 is arranged on the indication plate 13 at the side part of the needle bar changing spanner 8, the needle bar changing spanner 8 moves leftwards or rightwards, and the convex position of the pressing part points to the L or R on the indication groove 15 to indicate the position of the needle bar changing spanner 8.
When the needle bar changing spanner 8 is moved to the left position, the sewing machine stops the left needle and only uses the right needle to perform single-needle sewing; conversely, when the needle bar changing spanner 8 is switched to the right position, the sewing machine stops the right needle and performs single-needle sewing with only the left needle.
When the plunger of the reset solenoid 1 is attracted, the release lever 3 is tilted away from the needle bar changing spanner 8, and the release lever 3 is disengaged from the stopper screw to be in a non-engaged state, so that the needle bar changing spanner 8 is returned to the intermediate position by the holding spring 12, and the sewing machine is in a double-needle sewing state.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (8)
1. A method for switching the sewing state of a single needle and a double needle of a sewing machine, wherein the sewing machine can be switched from the sewing state of the single needle to the sewing state of the double needle by controlling a reset mechanism, is characterized by comprising the following steps:
step a: when the sewing machine is in a double-needle sewing state, judging whether the needle bar changing spanner is at a designated position, if so, executing the step e, and if not, executing the step b;
step b: judging whether the operation parameters of the sewing machine meet the first migration conditions, if so, stopping the sewing of the sewing machine to execute the step c, and if not, maintaining the current situation and returning to the step a;
step c: judging whether the needle bar conversion wrench is at a designated position, if so, executing the step e, and if not, executing the step d;
step d: c, starting the sewing in the double-needle sewing state again, judging whether the needle bar changing spanner is at a designated position, if so, executing the step e, and if not, maintaining the current situation and returning to the step c;
step e: the sewing machine is switched from the double-needle sewing state to the single-needle sewing state, when the sewing machine is in the single-needle sewing state, whether the operation parameters of the sewing machine meet the second migration conditions is judged, if yes, the sewing machine is switched from the single-needle sewing state to the double-needle sewing state through the reset mechanism, and if not, the current state is maintained.
2. The method for switching a single/double needle sewing state of a sewing machine according to claim 1, wherein when the sewing machine is in a double needle sewing state, whether the needle bar changing spanner is at a specified position is determined by the needle bar changing spanner position sensor.
3. The method for switching a single-needle and double-needle sewing state of a sewing machine according to claim 1 or 2, wherein the first migration condition is a preset number of needles for double-needle sewing, and the second migration condition is a preset number of needles for single-needle sewing.
4. The method for switching a single needle and double needle sewing state of a sewing machine according to claim 1, wherein the designated position is a left position or a right position of a needle bar changing spanner;
wherein the left position corresponds to a single-needle sewing state in which a left needle of the sewing machine is stopped and a right needle is sewn; the right position corresponds to a single needle sewing state in which the right needle of the sewing machine is stopped and the left needle is sewn.
5. The method for switching a single needle and double needle sewing state of a sewing machine according to claim 1, wherein the operation parameter is a number of needles completed by the sewing machine.
6. A single-double needle sewing state switching device of a sewing machine for switching a single-double needle sewing state by the single-double needle sewing state switching method of the sewing machine according to any one of claims 1 to 5, characterized by comprising:
a needle bar changing wrench corresponding to a single needle sewing state of the sewing machine when the needle bar changing wrench is positioned at a left position or a right position; and
and a reset mechanism for moving the needle bar changing spanner from the left position or the right position to the middle position, so that the sewing machine is switched from a single-needle sewing state to a double-needle sewing state.
7. The single or double needle sewing state switching device of the sewing machine according to claim 6, wherein the reset mechanism comprises:
a release lever which is interlocked with the needle bar conversion wrench when the needle bar conversion wrench is located at a left position or a right position; when the needle bar changing spanner is positioned at the middle position, the unlocking rod is not locked with the needle bar changing spanner; and
and a reset solenoid connected to the release lever, the reset solenoid being configured to pull the release lever to move in a direction away from the needle bar conversion wrench, so that the release lever is unlocked from the needle bar conversion wrench, and the needle bar conversion wrench is moved from a left position or a right position to an intermediate position.
8. The single or double needle sewing state switching device of a sewing machine according to claim 6 or 7, further comprising:
a needle bar conversion wrench position sensor for detecting whether the needle bar conversion wrench is located at a left position or a right position; and
the needle bar change spanner position change mechanism comprises a change rod shaft, one side of the change rod shaft is connected with the end part of the needle bar change spanner, the other side of the change rod shaft is provided with a change arm, and the change arm is connected with the needle bar change spanner position sensor through a fixing plate.
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| CN106948094A (en) * | 2017-05-15 | 2017-07-14 | 杰克缝纫机股份有限公司 | A kind of needle bar of sewing machine clutch and double needle machine |
| CN107700095A (en) * | 2017-11-13 | 2018-02-16 | 杰克缝纫机股份有限公司 | A kind of two-needle sewing machine and its shank clutch reset device |
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| CN101435139A (en) * | 2007-11-15 | 2009-05-20 | Juki株式会社 | Single needle switching apparatus of double-needle sewing machine |
| CN101532221A (en) * | 2008-03-10 | 2009-09-16 | Juki株式会社 | Device for switching single needle of sewing machine |
| JP2009219780A (en) * | 2008-03-18 | 2009-10-01 | Juki Corp | Two-needle sewing machine |
| CN102443975A (en) * | 2011-10-27 | 2012-05-09 | 西安标准工业股份有限公司 | Reset device for displaced needle bar of double-needle machine |
| CN106948094A (en) * | 2017-05-15 | 2017-07-14 | 杰克缝纫机股份有限公司 | A kind of needle bar of sewing machine clutch and double needle machine |
| CN107700095A (en) * | 2017-11-13 | 2018-02-16 | 杰克缝纫机股份有限公司 | A kind of two-needle sewing machine and its shank clutch reset device |
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