CN215440951U

CN215440951U - Sewing machine with backstitch control device

Info

Publication number: CN215440951U
Application number: CN202120742752.0U
Authority: CN
Inventors: 颜慧军
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2022-01-07
Anticipated expiration: 2031-04-12

Abstract

The utility model relates to the technical field of sewing equipment, and discloses a sewing machine with a backstitch control device, which comprises a machine shell and a backstitch wrench, wherein the backstitch wrench is rotatably arranged on the machine shell; still include magnetism and feel switch and contact pin, magnetism is felt the switch and is located one side of backstitch spanner, wears to establish in the magnetism is felt the switch with the contact pin liftable, and the contact pin passes through first axle position screw connection on the backstitch spanner, drives the contact pin and goes up and down when the backstitch spanner rotates. The utility model reduces the number of changed parts to reduce the cost, and adds a backstitch wrench mechanism on the basis of the existing structure. The concrete structure of the control mechanism is simplified, and the operation of the control mechanism is convenient according to the habit of personnel.

Description

Sewing machine with backstitch control device

Technical Field

The utility model relates to the technical field of sewing equipment, in particular to a sewing machine with a backstitch control device.

Background

At present, the stepping motor is gradually turned into a trend for controlling the needle pitch adjustment action, compared with the traditional technology, the technology can obtain accurate needle pitch and silent backstitch, and can realize a series of actions related to the needle pitch, so that the backstitch wrench is forced to be cancelled, and the backstitch is realized by using a key on a head illuminating lamp of a shell. However, due to the operation habit of workers (left-hand cloth control and right-hand backstitch wrench), the operation is inconvenient, so that a backstitch control device can be designed to realize the actions of needle pitch change and the like under the control of the conventional stepping motor for adjusting the needle pitch.

As in the patent publication 201922275199.X, this patent is provided with the magnetic path in backstitch spanner breach department, realizes the backstitch through hall subassembly, but it limits the stroke and the torsional spring of spanner through a plurality of spacer pins, and the part is more to it is located step motor below, and the step motor of present market mainstream adjusts the pitch mechanism, does not have sufficient installation space in step motor below, has more installation space only in step motor left side.

Disclosure of Invention

In view of the above-mentioned disadvantages of the prior art sewing machines, the present invention provides a sewing machine having a backstitch control device.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

the sewing machine with the backstitch control device comprises a machine shell and a backstitch wrench, wherein the backstitch wrench is rotatably arranged on the machine shell;

still include magnetism and feel switch and contact pin, magnetism is felt the switch and is located one side of backstitch spanner, wears to establish in the magnetism is felt the switch with the contact pin liftable, and the contact pin passes through first axle position screw connection on the backstitch spanner, drives the contact pin and goes up and down when the backstitch spanner rotates.

Preferably, still wrap extension spring and extension spring fixed pin, extension spring fixed pin is installed on the casing fixedly and is set up in the opposite side of backstitch spanner, and the both ends of extension spring are connected with the end connection of extension spring fixed pin and contact pin respectively.

Preferably, the contact pin includes connecting portion and response portion, and connecting portion are located the top of response portion and with response position integral type structure.

Preferably, the connecting part is provided with a tension spring hole and a first through hole, the lower end of the tension spring is connected with the tension spring hole, the first axial screw penetrates through the first through hole and is connected with the backstitch wrench, and the sensing part penetrates through the magnetic induction switch and can do lifting motion in the magnetic induction switch.

Preferably, still include spacing retaining ring, spacing retaining ring sets up respectively in the both sides of backstitch spanner, and spacing retaining ring is used for injecing the angle that the backstitch spanner rotated.

Preferably, the backstitch wrench comprises a control part and a rotating part, the control part is connected with the inserting needle, and the rotating part is located on one side of the control part and is arranged above the control part.

Preferably, the rotating part is provided with a second through hole, the second axial screw penetrates through the second through hole and is connected with the shell, and the rotating part can rotate around the second axial screw.

Preferably, the needle pitch adjusting mechanism further comprises a stepping motor connected with the needle pitch adjusting mechanism, and the stepping motor is connected with the magnetic induction switch through a control system and is installed on the machine shell.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: the number of changed parts is reduced to reduce the cost, and a backstitch wrench mechanism is added on the basis of the existing structure. When the stitch length is switched, a worker downwards stirs the backstitch wrench, the backstitch wrench downwards rotates and drives the contact pin to downwards move, the contact pin gradually enters the magnetic induction switch, the magnetic flux in the magnetic induction switch gradually changes along with the entrance of the contact pin, and the magnetic induction switch controls the sewing machine to adjust the stitch length along with the change of the magnetic flux until backstitch is achieved. The concrete structure of the control mechanism is simplified, and the operation of the control mechanism is convenient according to the habit of personnel.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion M in fig. 1.

FIG. 3 is a schematic view of the maximum stitch length configuration of the present invention.

FIG. 4 is a schematic view of the maximum backstitch gauge configuration of the present invention.

Fig. 5 is a perspective view of the backstitch wrench.

Fig. 6 is a perspective view of the pin.

The names of the parts indicated by the numerical references in the drawings are as follows: 1, a machine shell; 2-pin, 201-connecting part, 2011-tension spring hole, 2022-first through hole, 202-induction part; 3-backstitch spanner, 301-control part, 3011-third through hole, 302-rotation part, 3021-second through hole; 4-magnetic induction switch; 5, a tension spring; 6, fixing a tension spring; 7, a limiting check ring; 8-first axial position screw; 9-second axial screw; 10-step motor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A sewing machine having a backstitch control device, as shown in fig. 1 to 6, includes a machine case 1 and a backstitch wrench 3, the backstitch wrench 3 being rotatably provided on the machine case 1; still include magnetic induction switch 4 and contact pin 2, magnetic induction switch 4 is located backstitch spanner 3's one side, and contact pin 2 is worn to establish in magnetic induction switch 4 with liftable, and contact pin 2 passes through first axle position screw 8 to be connected on backstitch spanner 3, drives contact pin 2 and goes up and down when backstitch spanner 3 rotates. When switching the gauge needle, the staff stirs backstitch spanner 3 downwards, and backstitch spanner 3 downwardly rotating drives contact pin 2 and moves down, and contact pin 2 gets into in magnetism feels switch 4 gradually, and the magnetic flux in magnetism feels switch 4 changes along with the entering of contact pin 2 gradually, and magnetism feels switch 4 and carries out the gauge needle regulation until realizing the backstitch through control system control sewing machine along with the change of magnetic flux. The concrete structure of the control mechanism is simplified, and the operation of the control mechanism is convenient according to the habit of personnel.

Still wrap extension spring 5 and extension spring fixed pin 6, extension spring fixed pin 6 installs fixedly on casing 1 and sets up in the opposite side of backstitch spanner 3, and the both ends of extension spring 5 are connected with the end connection of extension spring fixed pin 6 and contact pin 2 respectively. When the contact pin 2 gradually enters the magnetic induction switch 4 downwards, the tension spring 5 is stretched. One end that extension spring 5 and extension spring fixed pin 6 are connected is fixed motionless, and contact pin 2 receives the ascending pulling force of extension spring 5, and when the staff loosened backstitch spanner 3, extension spring 5 pulling contact pin 2 rebound makes contact pin 2 and the separation of magnetism sense switch 4, and backstitch spanner 3 upwards rotates under contact pin 2's drive, accomplishes and resets, has simplified backstitch spanner 3's operation structure and operating means.

The contact pin 2 includes a connection portion 201 and a sensing portion 202, and the connection portion 201 is located above the sensing portion 202 and has an integrated structure with the sensing portion 202. Connecting portion 201 and backstitch spanner 3 cooperation motion, response portion 202 and magnetic induction switch 4 cooperation work, when backstitch spanner 3 moved, realized the synchronization action of connecting portion 201 and response portion 202, improved the stability of backstitch spanner 3, contact pin 2, magnetic induction switch 4 cooperation work and the precision of action.

The connecting portion 201 is provided with a tension spring hole 2011 and a first through hole 2022, the lower end of the tension spring 5 is connected with the tension spring hole 2011, the first axial screw 8 penetrates through the first through hole 2022 and is connected with the backstitch wrench 3, and the sensing portion 202 penetrates through the magnetic sensing switch 4 and can perform lifting movement in the magnetic sensing switch 4. Extension spring 5 is connected with connecting portion 201 through extension spring hole 2011, makes things convenient for being connected of extension spring 5 and connecting portion 201. Connecting portion 201 is connected with backstitch spanner 3 through first axle position screw 8, makes connecting portion 201 and backstitch spanner 3 relatively rotatable, can drive connecting portion 201 in the removal of vertical direction when backstitch spanner 3 rotates to improve the position precision that contact pin 2 goes up and down.

Still include spacing retaining ring 7, spacing retaining ring 7 sets up respectively in the both sides of backstitch spanner 3, and spacing retaining ring 7 is used for injecing the pivoted angle of backstitch spanner 3. The material of the limit check ring 7 is rubber material or plastic material. The limiting retainer ring 7 is fixedly mounted on the machine shell 1 through screws, and the position stability of the limiting retainer ring 7 is improved. And the limiting retainer rings 7 are respectively arranged at the upper side and the lower side of the backstitch wrench 3 to limit the rotating range of the backstitch wrench 3, and simultaneously limit the lifting position of the contact pin 2 in the magnetic induction switch 4, thereby improving the control precision of the magnetic induction switch 4.

Example 2

As shown in fig. 1 to 6, in the sewing machine having the backstitch control device according to embodiment 1, the backstitch wrench 3 includes a control portion 301 and a rotating portion 302, the control portion 301 is connected to the needle 2, and the rotating portion 302 is located on one side of the control portion 301 and is disposed above the control portion 301. The backstitch wrench 3 rotates on the machine shell 1 through the rotating part 302, the control part 301 rotates synchronously along with the rotating part 302, the rotating stability of the backstitch wrench 3 is improved, and meanwhile, the operation of workers is facilitated.

The rotating part 302 is provided with a second through hole 3021, the second axial screw 9 penetrates through the second through hole 3021 and is connected with the housing 1, and the rotating part 302 can rotate around the second axial screw 9. The control portion 301 is provided with a third through hole 3011, and the first axial screw 8 is inserted into the third through hole 3011. The rotating part 302 rotates on the machine shell 1 around the second axial screw 9, so that the stability of the backstitch wrench 3 during rotation is improved, and the backstitch wrench 3 is convenient for workers to operate.

Example 3

As shown in fig. 1 to 6, the sewing machine with the backstitch control device further includes a stepping motor 10 connected to the needle pitch adjusting mechanism on the basis of embodiment 2, and the stepping motor 10 is connected to the magnetic induction switch 4 through a control system and is mounted on the machine case 1. The control system is used for converting the signal of the magnetic induction switch 4 into a needle pitch adjusting signal and transmitting the needle pitch adjusting signal to the stepping motor 10, and the stepping motor 10 drives the needle pitch adjusting mechanism to adjust the needle pitch. When the backstitch wrench 3 drives the inserting needle 2 to enter the magnetic induction switch 4, the magnetic induction quantity of a magnetic induction coil in the magnetic induction switch 4 changes, the magnetic induction switch 4 transmits a corresponding control signal to the stepping motor 10 through the control system according to the change of the magnetic induction quantity, and the stepping motor 10 controls the needle pitch adjusting mechanism to perform corresponding needle pitch adjusting action. As the inserting needle 2 gradually enters the magnetic induction coil, the stepping motor 10 controls the stitch length adjusted by the stitch length adjusting mechanism to gradually decrease until the stitch length is adjusted to be the backstitch stitch length equal to the original forward stitch length. For example, when the stitch length is 3mm, when the sensing part 202 of the contact pin 2 completely enters the bottom of the magnetic induction coil, the stitch length is changed to 3mm, which facilitates the control of the stitch length change.

When the sewing machine is in a forward sewing state, the backstitch wrench 3 is abutted against a limiting retainer ring 7 above the backstitch wrench 3 under the action of the tension spring 5, the lower end part of the contact pin 2 is also positioned at the upper end of the magnetic induction switch 4 at the moment, and the magnetic flux in the magnetic induction switch 4 is in a maximum state. When backstitch spanner 3 was in last extreme position, extension spring fixed pin 6, contact pin 2 and magnetism were felt switch 4 and are located same vertical line, when backstitch spanner 3 pushed down, contact pin 2 penetrated in magnetism was felt switch 4 easily.

When the sewing machine is switched to a backstitch state, a worker presses down the backstitch wrench 3, the backstitch wrench 3 drives the inserting needle 2 to move downwards through the first shaft position screw 8, the induction part 202 of the inserting needle 2 gradually enters the magnetic induction switch 4 under the driving of the backstitch wrench 3, magnetic flux in the magnetic induction switch 4 gradually changes along with the entering of the induction part 202, the magnetic induction switch 4 changes along with the magnetic flux, corresponding signals are transmitted to the control system at the same time, the control system outputs corresponding needle distance adjusting signals to the stepping motor 10 according to the signals changed by the magnetic flux in the magnetic induction switch 4, and the stepping motor 10 controls the needle distance adjusting mechanism to perform corresponding needle distance adjustment according to the needle distance adjusting signals. When the backstitch wrench 3 abuts against the limiting retainer ring 7 below the backstitch wrench 3, the sensing part 202 completely enters the magnetic induction switch 4, and the needle pitch of the sewing machine is changed into the maximum backstitch needle pitch.

The sewing machine with the backstitch control device has the following characteristics and advantages:

1. the magnetic flux in the magnetic induction switch is changed according to the position of the contact pin in the magnetic induction switch, the change of the magnetic flux in the magnetic induction switch is converted into a needle pitch adjusting signal through a control system to control the sewing machine to adjust the needle pitch, the movement of the contact pin in the magnetic induction switch is controlled through controlling the backstitch wrench, the backstitch wrench and the contact pin move synchronously, the needle pitch adjusting mode of the sewing machine is simplified, and meanwhile, the operation of adjusting the needle pitch by workers according to habits is facilitated.

2. The one end of extension spring is fixed through the extension spring fixed pin, and the other end of extension spring changes according to the contact pin position, provides the power that resets for contact pin and backstitch spanner simultaneously, makes things convenient for contact pin and backstitch spanner to reset, has simplified the structure of backstitch spanner and contact pin and the mode of operation.

3. The limiting retainer rings positioned on the upper side and the lower side of the backstitch wrench limit the rotating angle of the backstitch wrench, and limit the lifting position of the contact pin, so that the matching precision of the induction part and the magnetic induction switch of the contact pin is improved.

Claims

1. Sewing machine with backstitch controlling means, including casing (1) and backstitch spanner (3), its characterized in that: the backstitch wrench (3) is rotatably arranged on the shell (1);

still include magnetism and feel switch (4) and contact pin (2), magnetism is felt switch (4) and is located one side of backstitch spanner (3), wears to establish in magnetism is felt switch (4) contact pin (2) liftable, and contact pin (2) are connected on backstitch spanner (3) through first axle position screw (8), drives contact pin (2) and goes up and down when backstitch spanner (3) rotate.

2. The sewing machine with backstitch control as claimed in claim 1, wherein: the sewing machine is characterized by further comprising a tension spring (5) and a tension spring fixing pin (6), wherein the tension spring fixing pin (6) is fixedly installed on the machine shell (1) and is arranged on the other side of the backstitch wrench (3), and two ends of the tension spring (5) are respectively connected with the end portions of the tension spring fixing pin (6) and the contact pin (2).

3. The sewing machine with backstitch control as claimed in claim 2, wherein: the contact pin (2) comprises a connecting part (201) and a sensing part (202), wherein the connecting part (201) is located above the sensing part (202) and is in an integrated structure with the sensing part (202).

4. The sewing machine with backstitch control as claimed in claim 3, wherein: connecting portion (201) are last to have seted up extension spring hole (2011) and first through-hole (2022), and the lower extreme and the extension spring hole (2011) of extension spring (5) are connected, and first axial screw (8) run through in first through-hole (2022) and are connected with backstitch spanner (3), and induction part (202) wear to establish in magnetism sense switch (4) and can do the elevating movement in magnetism sense switch (4).

5. The sewing machine with backstitch control as claimed in claim 1, wherein: the novel reverse-seam wrench is characterized by further comprising limiting check rings (7), wherein the limiting check rings (7) are arranged on two sides of the reverse-seam wrench (3) respectively, and the limiting check rings (7) are used for limiting the rotating angle of the reverse-seam wrench (3).

6. The sewing machine with backstitch control as claimed in claim 1, wherein: backstitch spanner (3) include control part (301) and rotation portion (302), and control part (301) are connected with contact pin (4), and rotation portion (302) are located one side of control part (301) and set up in the top of control part (301).

7. The sewing machine with backstitch control as claimed in claim 6, wherein: the rotating part (302) is provided with a second through hole (3021), the second through hole (3021) penetrates through the second through hole (3021) and is connected with the machine shell (1), and the rotating part (302) can rotate around the second through hole (9).

8. The sewing machine with backstitch control as claimed in claim 1, wherein: the needle pitch control mechanism is characterized by further comprising a stepping motor (10) connected with the needle pitch adjusting mechanism, wherein the stepping motor (10) is connected with the magnetic induction switch (4) through a control system and is installed on the machine shell (1).