CN216074258U - Needle pitch adjusting mechanism of sewing machine - Google Patents

Abstract

The utility model discloses a needle pitch adjusting mechanism of a sewing machine, relating to the technical field of sewing equipment accessories and having the technical scheme key points that: including the gauge needle dial, the adjusting stud, pay-off knob and locating component, the gauge needle dial is fixed in on the aircraft nose of sewing machine, circumference is provided with a plurality of tooth spaces in the gauge needle dial, the inner of adjusting stud runs through the gauge needle dial and stretches into in the sewing machine, the outer end of adjusting stud is connected in the cavity in the pay-off knob, set up the guiding hole of UNICOM cavity on the lateral wall of pay-off knob, locating component slides and sets up in the guiding hole, and locating component has the location portion with the tooth's socket adaptation, when locating component slides along the radial of pay-off knob, location portion can stretch into and the roll-off tooth's socket. The feeding knob is rotated to drive the adjusting stud to rotate, so that the aim of conveniently adjusting the needle pitch is fulfilled; after the stitch length is adjusted, location portion stretches into the tooth's socket, and the pay-off knob just is spacing with the tooth's socket cooperation by location portion, and the stitch length is fixed the back promptly, and locking effect is better.

Description

Needle pitch adjusting mechanism of sewing machine

Technical Field

The utility model relates to the technical field of sewing equipment accessories, in particular to a needle pitch adjusting mechanism of a sewing machine.

Background

At present, in the needle pitch adjusting and locking device of the existing sewing machine, the material of the feeding pitch knob is usually plastic, and after the feeding pitch knob is repeatedly contacted with a stop pin, the feeding pitch knob is easily abraded, so that the locking function is failed. In the use, need the user singlehanded with the nipper pincers card stop pin, the pay-off distance knob is rotated to the other hand, just can accomplish the regulation, and the regulation mode is comparatively complicated, and the convenience is relatively poor.

In addition, in the actual use process, because the sewing machine generates vibration in the operation process, the traditional needle pitch adjusting and locking device has poor vibration filtering and shock resistance, and the needle pitch is changed in the use process, so that the processing quality of the clothes is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a needle pitch adjusting mechanism of a sewing machine, which has the advantages of convenience in adjustment and good needle pitch locking effect.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a sewing machine's gauge needle adjustment mechanism, includes gauge needle dial, adjusting screw, pay-off knob and locating component, the gauge needle dial is fixed in sewing machine's aircraft nose, circumference is provided with a plurality of tooth's sockets in the gauge needle dial, adjusting screw runs through the inner of adjusting screw the gauge needle dial and stretch into in the sewing machine, adjusting screw's outer end connect in the cavity in the pay-off knob, UNICOM has been seted up on the lateral wall of pay-off knob the guiding hole of cavity, locating component slide set up in the guiding hole, just locating component have with the location portion of tooth's socket adaptation, locating component follows during radial sliding of pay-off knob, location portion can stretch into and the roll-off the tooth's socket.

According to the technical scheme, before the feeding knob is rotated, the positioning assembly is pressed firstly, so that the positioning assembly slides along the guide hole, finally the positioning part slides out of the tooth groove, and the feeding knob can rotate freely; the needle gauge dial is fixed with the sewing machine, the adjusting stud is connected with the feeding knob, and the feeding knob is rotated to drive the adjusting stud to rotate, so that the aim of conveniently adjusting the needle gauge is fulfilled; after the gauge needle is adjusted for locating component resets, and location portion stretches into the tooth's socket again in, and the pay-off knob just is spacing with the tooth's socket cooperation by location portion, and the pay-off knob can not take place relative rotation for the gauge needle dial promptly, realizes that the gauge needle is fixed the back, can not be because of the purpose that vibrations changed, and locking effect is better.

Preferably, the gauge needle comprises a fixing ring and a fluted disc, the fluted disc is arranged in the fixing ring, and the fluted disc is circumferentially arranged on the fluted disc.

Through above-mentioned technical scheme, the fluted disc sets up in the retaining ring, has reduced the diameter of fluted disc to be convenient for location portion and tooth's socket cooperation.

Preferably, the tooth grooves are circumferentially opened to the outer peripheral wall of the toothed plate.

Through above-mentioned technical scheme, the tooth's socket sets up in the outer wall of fluted disc, does benefit to the cooperation of location portion and tooth's socket.

Preferably, an installation part is arranged in the cavity, the positioning assembly comprises a dial buckle and a reset piece, the positioning part is arranged on the dial buckle, a sliding part is further arranged on the dial buckle, the sliding part is arranged in the guide hole in a sliding manner, and the sliding part and the positioning part are respectively positioned on two sides of the adjusting stud; the confession has on the dial buckle the groove of stepping down that the installation department passed, reset the piece set up in the installation department with between the portion of sliding, just it can be right to reset the piece the portion of sliding is applyed in order to keep away from adjust the pretightning force of double-screw bolt direction.

According to the technical scheme, the resetting piece pushes the sliding part away from the adjusting stud, the positioning part approaches to the direction of the adjusting stud, and then the positioning part extends into the tooth socket, so that the positioning part and the tooth socket are locked; when the sliding part is pressed, the sliding part is close to the adjusting stud, the dial buckle and the positioning part integrally slide, the positioning part is far away from the adjusting stud, and finally the positioning part is separated from the tooth socket, so that the unlocking of the positioning part and the tooth socket is realized.

Preferably, the positioning assembly further comprises a button, and a guide groove is formed in one side of the mounting part, which faces the guide hole; the inner end of the button is provided with a guide part, and the guide part penetrates through the sliding part and is arranged in the guide groove in a sliding manner.

Through the technical scheme, the guide part penetrates through the sliding part and slides in the guide groove, so that the sliding direction of the dial buckle is ensured.

Preferably, the needle distance scale plate is provided with scale marks, the scale marks correspond to the tooth sockets, and the button is provided with an indication mark pointing to the scale marks.

Through above-mentioned technical scheme, the directional scale mark of pilot mark, when rotating the pay-off button, pilot mark can point to different scale marks, and the person of being convenient for is audio-visual observes the turned angle who sends the material knob to judge the adjusting position of gauge needle.

Preferably, the inner wall of the cavity is provided with a sliding groove for the positioning part to slide.

Through above-mentioned technical scheme, the spout supplies location portion to slide, and the location portion of being convenient for can stretch into and the roll-off tooth's socket from fixed position.

Preferably, the opening part of the chute is provided with a reinforcing rib, and the reinforcing rib can limit the positioning part.

Through the technical scheme, after the positioning part extends into the tooth socket, the reinforcing rib can limit the positioning part, the positioning part cannot be damaged by rotating the feeding knob at the moment, or the positioning part is bent, so that the normal sliding of the positioning part is ensured.

Preferably, the mounting part is provided with a limit groove, and the limit groove is matched with the reset piece.

Through above-mentioned technical scheme, spacing groove is spacing to the piece that resets to make the piece that resets can provide comparatively stable pretightning force.

Preferably, a guide block is arranged in the cavity, and a fixing groove is formed in the guide block; a connecting part is arranged on one side, close to the guide block, of the scale plate buckle, a waist-shaped hole communicated with the fixing groove is formed in the connecting part, and the length direction of the waist-shaped hole is the same as the sliding direction of the scale plate buckle; the needle pitch adjusting mechanism further comprises a limiting bolt, the limiting bolt penetrates through the waist-shaped hole and is connected to the inside of the fixing groove, so that the connecting portion is limited, and when the dial buckle slides, the limiting bolt guides the waist-shaped hole.

Through the technical scheme, when the dial buckle slides, the limiting bolt guides the waist-shaped hole, so that the sliding direction of the dial buckle is further ensured; meanwhile, the side displacement of the dial buckle is avoided.

Drawings

FIG. 1 is a schematic diagram of an exploded structure of an embodiment;

FIG. 2 is a schematic structural view of the assembled embodiment;

FIG. 3 is a schematic view of another side of FIG. 2;

FIG. 4 is a schematic structural diagram of a gauge dial in an embodiment;

FIG. 5 is a schematic structural diagram of a positioning assembly according to an embodiment;

FIG. 6 is a schematic structural view of the reticle chuck snap in the embodiment;

FIG. 7 is a schematic external view of a feed knob in an embodiment;

FIG. 8 is another side view of the structure of FIG. 7;

fig. 9 is another side view of fig. 7.

Reference numerals: 100. a needle gage dial; 110. a fixing ring; 111. scale lines; 120. a fluted disc; 121. a tooth socket; 130. a connecting pin;

200. adjusting the stud;

300. a feeding knob; 310. a cavity; 311. an installation part; 3111. a guide groove; 312. a chute; 3121. reinforcing ribs; 313. a limiting groove; 314. a guide block; 3141. fixing grooves; 320. a guide hole;

400. a positioning assembly; 410. a marking plate is buckled; 411. a positioning part; 412. a sliding part; 413. a yielding groove; 414. a connecting portion; 4141. a waist-shaped hole; 420. a reset member; 421. a return spring; 430. a button; 431. a guide portion; 4311. a groove; 4312. a clamp spring; 432. an indication mark;

500. a limit bolt;

600. and (5) fixing the bolt.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

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

A needle pitch adjusting mechanism of a sewing machine is shown in figures 1 to 9 and comprises a needle pitch dial 100, an adjusting stud 200, a feeding knob 300 and a positioning assembly 400, wherein the needle pitch dial 100 is fixed on a machine head of the sewing machine, a plurality of tooth grooves 121 are formed in the needle pitch dial 100 in the circumferential direction, the inner end of the adjusting stud 200 penetrates through the needle pitch dial 100 and extends into the sewing machine, the outer end of the adjusting stud 200 is connected into a cavity 310 in the feeding knob 300, a guide hole 320 communicated with the cavity 310 is formed in the side wall of the feeding knob 300, the positioning assembly 400 is arranged in the guide hole 320 in a sliding mode, the positioning assembly 400 is provided with a positioning portion 411 matched with the tooth grooves 121, and when the positioning assembly 400 slides along the radial direction of the feeding knob 300, the positioning portion 411 can extend into and slide out of the tooth grooves 121.

Preferably, the needle gage dial 100 includes a fixed ring 110 and a toothed plate 120, the toothed plate 120 is disposed in the fixed ring 110, the toothed plate 120 and the fixed ring 110 are connected by a connecting pin 130, and the tooth grooves 121 are circumferentially opened on an outer circumferential wall of the toothed plate 120.

Alternatively, the tooth groove 121 may be circumferentially opened on the inner circumferential wall of the toothed disc 120, so long as the positioning portion 411 of the positioning assembly 400 can be inserted into and slid out of the tooth groove 121.

Preferably, the cavity 310 has a mounting portion 311 therein, and the adjusting stud 200 is connected to the mounting portion 311 by a fixing bolt 600; the positioning assembly 400 comprises a target buckle 410 and a reset piece 420, the positioning part 411 is arranged on the target buckle 410, a sliding part 412 is further arranged on the target buckle 410, the sliding part 412 is arranged in the guide hole 320 in a sliding manner, and the sliding part 412 and the positioning part 411 are respectively positioned at two sides of the adjusting stud 200; the dial buckle 410 is provided with an abdicating groove 413 for the installation part 311 to pass through, the reset piece 420 is arranged between the installation part 311 and the sliding part 412, and the reset piece 420 can apply pretightening force to the sliding part 412 in the direction away from the adjusting stud 200.

Further, the positioning assembly 400 further includes a button 430 capable of sliding in the guide hole 320, and a guide groove 3111 is formed on one side of the mounting portion 311 facing the guide hole 320; the inner end of the button 430 is provided with a guide part 431, the guide part 431 penetrates through the sliding part 412 and is arranged in the guide groove 3111 in a sliding manner, the lower end face, located on the sliding part 412, of the guide part 431 is provided with a groove 4311, a clamp spring 4312 is arranged in the groove 4311, and the clamp spring 4312 is used for being matched with the lower end face of the sliding part 412 to limit the axial direction of the button 430.

The mounting portion 311 is provided with a limiting groove 313, the limiting groove 313 is matched with the reset piece 420, preferably, the reset piece 420 is a reset spring 421, one end of the reset spring 421 abuts against the lower end face of the sliding portion 412, and the other end of the reset spring 421 abuts against the groove bottom of the limiting groove 313.

Furthermore, the outer end face of the fixing ring 110 is provided with scale marks 111, the scale marks 111 correspond to the tooth grooves 121, and the scale marks 111 can also be provided with marks such as numbers or letters; the button 430 is provided with an indicator 432 pointing to the graduation mark 111, and the indicator 432 may be an arrow or the button 430 itself.

Further, the inner wall of the cavity 310 is provided with a sliding groove 312 for the positioning portion 411 to slide; and the opening part of the chute 312 is provided with a reinforcing rib 3121, and the reinforcing rib 3121 can limit the positioning part 411.

A guide block 314 is arranged in the cavity 310, and a fixing groove 3141 is formed in the guide block 314; a connecting part 414 is arranged on one side of the dial plate buckle 410 close to the guide block 314, the connecting part 414 can be in surface contact with the end face of the guide block 314 with the fixing groove 3141, a waist-shaped hole 4141 communicated with the fixing groove 3141 is formed in the connecting part 414, of course, the waist-shaped hole 4141 can also be replaced by a long-strip-shaped hole, and the length direction of the waist-shaped hole 4141 is the same as the sliding direction of the dial plate buckle 410; the needle pitch adjusting mechanism further comprises a limiting bolt 500, the limiting bolt 500 penetrates through the waist-shaped hole 4141 and is in threaded connection with the fixing groove 3141, so that the connecting portion 414 is limited, and when the dial buckle 410 slides, the limiting bolt 500 guides the waist-shaped hole 4141. Preferably, the guide block 314 is integrally formed with the mounting portion 311, thereby increasing the structural strength of the feed knob 300.

The working principle of a needle pitch adjusting mechanism of a sewing machine is as follows:

under normal conditions, the sliding part 412 is pushed away from the adjusting stud 200 by the return spring 421, and the positioning part 411 approaches to the adjusting stud 200, so that the positioning part 411 extends into the tooth groove 121, and the locking of the positioning part 411 and the tooth groove 121 is realized;

before the feeding knob 300 is rotated, an external force which is applied to the button 430 to point to the direction of the adjusting stud 200 is pressed, so that the sliding part 412 approaches to the direction of the adjusting stud 200, the dial plate buckle 410 and the positioning part 411 integrally slide, the positioning part 411 is far away from the adjusting stud 200, and finally the positioning part 411 is separated from the tooth groove 121, so that the positioning part 411 and the tooth groove 121 are unlocked, and the feeding knob 300 can freely rotate; meanwhile, the limiting bolt 500 guides the waist-shaped hole 4141, the sliding direction of the scale plate buckle 410 is guaranteed, lateral displacement of the scale plate buckle 410 is avoided, the reinforcing rib 3121 limits the positioning portion 411, and the relative position of the positioning portion 411 is guaranteed.

Because the needle gage dial 100 is fixed with the sewing machine, the adjusting stud 200 is fixed with the feeding knob 300, the feeding knob 300 is rotated to drive the adjusting stud 200 to rotate, the needle gage is adjusted, in the process of rotating the feeding knob 300, the indicating mark 432 rotates along with the feeding knob 300 and can point to different scale marks 111, a user can visually observe the rotating angle of the feeding knob 300 conveniently, and therefore the adjusting position of the needle gage is judged.

After the stitch length adjustment is finished, the external force applied to the button 430 is removed, the positioning part 411 extends into the tooth groove 121 again under the action of the return spring 421, and the locking of the positioning part 411 and the tooth groove 121 is realized, namely, the feeding knob 300 cannot rotate relative to the stitch length scale 100.

The above description is intended to be illustrative of the present invention and not to limit the scope of the utility model, which is defined by the claims appended hereto.

Claims (10)

1. The utility model provides a sewing machine's gauge needle adjustment mechanism which characterized in that: comprises a needle gage dial (100), an adjusting stud (200), a feeding knob (300) and a positioning component (400), the needle distance scale plate (100) is fixed on the machine head of the sewing machine, a plurality of tooth grooves (121) are arranged in the inner circumference of the needle distance scale plate (100), the inner end of the adjusting stud (200) penetrates through the needle gage mark disc (100) and extends into the sewing machine, the outer end of the adjusting stud (200) is connected to a cavity (310) in the feeding knob (300), the side wall of the feeding knob (300) is provided with a guide hole (320) communicated with the cavity (310), the positioning component (400) is arranged in the guide hole (320) in a sliding way, and the positioning component (400) is provided with a positioning part (411) matched with the tooth slot (121), when the positioning component (400) slides along the radial direction of the feeding knob (300), the positioning part (411) can extend into and slide out of the tooth groove (121).

2. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: gauge needle gage mark dish (100) are including solid fixed ring (110) and fluted disc (120), fluted disc (120) set up in gu in fixed ring (110), just tooth's socket (121) circumference is seted up in on fluted disc (120).

3. The needle pitch adjusting mechanism of a sewing machine according to claim 2, characterized in that: the tooth grooves (121) are circumferentially formed in the outer peripheral wall of the fluted disc (120).

4. The needle pitch adjusting mechanism of a sewing machine according to claim 2 or 3, characterized in that: the cavity (310) is internally provided with an installation part (311), the positioning assembly (400) comprises a scale plate buckle (410) and a reset piece (420), the positioning part (411) is arranged on the scale plate buckle (410), the scale plate buckle (410) is also provided with a sliding part (412), the sliding part (412) is arranged in the guide hole (320) in a sliding manner, and the sliding part (412) and the positioning part (411) are respectively positioned at two sides of the adjusting stud (200); have the confession on dial buckle (410) abdicating groove (413) that installation department (311) passed, reset piece (420) set up in installation department (311) with between the portion of sliding (412), just reset piece (420) can be right the portion of sliding (412) are applyed in order to keep away from adjust the pretightning force of double-screw bolt (200) direction.

5. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: the positioning assembly (400) further comprises a button (430), and a guide groove (3111) is formed in one side, facing the guide hole (320), of the mounting part (311); the inner end of the button (430) is provided with a guide part (431), and the guide part (431) penetrates through the sliding part (412) and is arranged in the guide groove (3111) in a sliding mode.

6. The needle pitch adjusting mechanism of a sewing machine according to claim 5, characterized in that: the gauge mark disc (100) is provided with scale marks (111), the scale marks (111) correspond to the tooth grooves (121), and the button (430) is provided with an indicating mark (432) pointing to the scale marks (111).

7. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: the inner wall of the cavity (310) is provided with a sliding groove (312) for the positioning part (411) to slide.

8. The needle pitch adjusting mechanism of a sewing machine according to claim 7, characterized in that: an opening of the sliding groove (312) is provided with a reinforcing rib (3121), and the reinforcing rib (3121) can limit the positioning portion (411).

9. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: the mounting portion (311) is provided with a limiting groove (313), and the limiting groove (313) is matched with the reset piece (420).

10. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: a guide block (314) is arranged in the cavity (310), and a fixing groove (3141) is formed in the guide block (314); a connecting part (414) is arranged on one side, close to the guide block (314), of the scale plate buckle (410), a waist-shaped hole (4141) communicated with the fixing groove (3141) is formed in the connecting part (414), and the length direction of the waist-shaped hole (4141) is the same as the sliding direction of the scale plate buckle (410); the needle distance adjusting mechanism further comprises a limiting bolt (500), the limiting bolt (500) penetrates through the waist-shaped hole (4141) and is connected into the fixing groove (3141) so as to limit the connecting portion (414), and when the dial buckle (410) slides, the limiting bolt (500) guides the waist-shaped hole (4141).

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