Sewing track limiting structure of pattern sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to a sewing track limiting structure of a pattern sewing machine, which comprises a needle bar mechanism, a driving mechanism, a needle support mechanism, a pattern die driving mechanism and a gear mechanism, the driving mechanism is used for driving the needle bar mechanism to vertically reciprocate; the needle support mechanism can drive the needle rod mechanism to horizontally move; the pattern die driving mechanism comprises a pattern cam, a swinging claw and a spring, and the swinging claw can drive the needle support mechanism to move in the first direction when swinging in the direction away from the pattern cam and extrude the spring; the gear mechanism is arranged on the side, located in the first direction, of the needle branch mechanism, and the needle branch mechanism makes contact with the gear mechanism when the swing claw is separated from the protruding area of the pattern cam. Compared with the prior art, the limiting structure can limit the horizontal movement end point of the needle support mechanism through the arrangement of the gear mechanism, the swinging angle of the swinging claw is prevented from being too large, and the limiting structure can be matched with the spring to reset the swinging claw.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing machine technical field, especially relate to a sewing track limiting structure of pattern sewing machine. BACKGROUND

[0002] Pattern sewing machine is a kind of machine for making complex pattern and decorative sewing. Unlike traditional straight sewing machine, pattern sewing machine can create various types of stitches, including curves, wavy lines, geometric shapes, etc.

[0003] The existing pattern sewing machine includes needle bar mechanism, driving mechanism, needle support mechanism, flower die driving mechanism, wherein the driving mechanism is used to drive the needle bar mechanism vertical reciprocating motion to realize the basic sewing action of sewing machine, the needle support mechanism is used to support the needle bar mechanism, the flower die driving mechanism drives the needle support mechanism to reciprocate in horizontal direction, the needle support mechanism drives the needle bar mechanism to move horizontally in the moving process, thereby changing the track of sewing on the cloth, specifically, the flower die driving mechanism includes pattern cam, connecting rod, swing shaft, swing claw, spring, the pattern cam is provided with protrusions of different arc lengths at interval along circumference, so that the surface of pattern cam presents protrusion area and recess area, one end of swing claw is connected with swing shaft, the other end contacts with the surface of pattern cam, spring is connected on swing shaft, one end of connecting rod is connected with swing shaft, the other end is connected with needle support mechanism, the swing claw swings in the process of pattern cam rotating, thereby driving swing shaft to swing, and then driving needle support mechanism to move in horizontal direction through connecting rod, when swing claw swings away from pattern cam, spring is pressed, so that when the end of swing claw is opposite to the position of recess area on pattern cam, spring drives swing claw to push towards pattern cam, so that swing claw contacts with pattern cam again, and the sewing of pattern is realized repeatedly.

[0004] However, in actual use, it is found that when the pattern cam rotates quickly, the swing claw swings too large under the inertia thrust, and it is difficult to reset the swing claw only by spring, and the service life of spring is not long, so the sewing machine needs to be frequently disassembled and assembled for spring replacement, therefore, the existing pattern sewing machine needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model provides a sewing track limiting structure of pattern sewing machine, which can limit the horizontal movement endpoint of needle support mechanism, avoid the swing claw swinging too large, and reset the swing claw with spring.

[0006] Therefore, the utility model provides a sewing track limiting structure of pattern sewing machine, which comprises:

[0007] The needle bar mechanism can sew lines on the cloth during vertical movement;

[0008] The driving mechanism is used for driving the needle bar mechanism to vertically reciprocate;

[0009] The needle supporting mechanism can drive the needle bar mechanism to horizontally move;

[0010] The pattern driving mechanism comprises a pattern cam, a swing claw and a spring, and when the swing claw swings away from the pattern cam, the swing claw drives the needle supporting mechanism to move in the first direction and presses the spring;

[0011] The gear mechanism is arranged on one side of the needle supporting mechanism in the first direction, and the needle supporting mechanism contacts the gear mechanism when the swing claw is separated from the convex area of the pattern cam.

[0012] In the technical solution, the driving mechanism cooperates with the needle bar mechanism to sew lines on the cloth, and in the process, the driving pattern mechanism drives the swing claw to swing by rotating the pattern cam, when the swing claw moves from the concave area to the convex area of the pattern cam, the swing claw swings away from the pattern cam, at this time, the swing claw drives the needle supporting mechanism to move in the first direction, and drives the needle bar mechanism to move in the first direction, when the swing claw swings to be separated from the convex area of the pattern cam, the needle supporting mechanism contacts the gear mechanism, so that the needle supporting mechanism cannot continue to move in the first direction, and the swing claw cannot swing away from the pattern cam again; when the swing claw moves from the convex area to the concave area of the pattern cam, the swing claw swings towards the pattern cam, at this time, the swing claw drives the needle supporting mechanism to move in the opposite direction of the first direction, so that the sewing machine can sew a nonlinear pattern.

[0013] In the above technical solution, further comprising a rack, the gear mechanism comprises a guide plate, the guide plate is connected with the rack, the guide plate is provided with a guide groove for the needle supporting mechanism to move in the first direction, and the guide plate is provided with an extension block perpendicular to the first direction.

[0014] In the above technical solution, further, the extension block is provided with a threaded hole, the extension block is connected with an adjusting screw, the threaded end of the adjusting screw is threadedly connected with the threaded hole, and the threaded end of the adjusting screw can contact the needle supporting mechanism after penetrating through the threaded hole.

[0015] In the above technical solution, further, the needle supporting mechanism comprises a needle support, the needle support is provided with a sliding part in sliding connection with the guide groove, the needle bar mechanism comprises a rod body, the needle support is provided with two through holes for the rod body to penetrate, the two through holes are distributed in the vertical direction, and the two through holes are coaxially distributed.

[0016] Further, the flower mold driving mechanism further comprises a swing shaft and a connecting rod, one end of the swing claw is connected with the swing shaft, one end of the connecting rod is connected with the swing shaft, and the other end of the connecting rod is connected with the lower end of the needle support, and the upper end of the needle support is rotationally connected with the rack.

[0017] In the above technical solution, further, the needle support is made by an injection molding process.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. By adding the gear position mechanism, when the swing claw swings away from the flower cam and the needle support moves to the farthest distance in the first direction, the needle support contacts the gear position mechanism, so that the needle support cannot continue to move in the first direction, and the swing claw cannot swing away from the flower cam, thereby avoiding excessive wear of the spring and prolonging the service life of the spring.

[0020] 2. By designing the gear position mechanism as a guide plate, an extension block, a threaded hole and an adjusting screw, the movement of the needle support in the first direction is blocked by the threaded end of the adjusting screw, so that when different flower cams are used, the adjusting screw can be rotated to change the distance between the threaded end and the needle support, so that the gear position mechanism can still be used with the spring.

[0021] 3. The needle support is processed by an injection molding process, which can ensure the coaxiality of the two through holes on the needle support and reduce the rate of defective products. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 It is a schematic diagram of the flower pattern sewing machine in the present application for sewing a nonlinear pattern.

[0024] Figure 2 It is a schematic diagram of the needle bar mechanism, driving mechanism, needle support mechanism and flower mold driving mechanism in the present application.

[0025] Figure 3 It is a schematic diagram of the needle bar mechanism, driving mechanism, needle support mechanism and flower mold driving mechanism in the present application.

[0026] Figure 4The utility model discloses a needle bar mechanism, drive mechanism, needle support mechanism, flower model drive mechanism's overhead structure schematic diagram.

[0027] Figure 5 The utility model discloses a needle bar mechanism, needle support mechanism, connecting rod's three-dimensional structure schematic diagram.

[0028] Figure 6 The utility model discloses a needle bar mechanism, needle support mechanism, connecting rod's main view structure schematic diagram.

[0029] Figure 7 The utility model discloses a guide frame plate three-dimensional structure schematic diagram.

[0030] Figure 8 The utility model discloses a needle support three-dimensional structure schematic diagram.

[0031] The figure mark shows that:

[0032] 1, needle bar mechanism;101, rod body;2, drive mechanism;3, needle support mechanism;301, needle support;302, sliding part;303, through -hole;4, flower model drive mechanism;401, flower cam;402, swing claw;403, spring;404, swing shaft;405, connecting rod;5, guide frame plate;501, guide slot;502, extension block;503, adjusting screw;6, rack;X, first direction; DETAILED DESCRIPTION

[0033] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of the utility model.

[0034] In the description of the utility model, it is necessary to explain that the terms used here are only for describing the specific embodiments and are not intended to limit the example embodiments according to the application. In order to facilitate the description, the size of each part shown in the drawings is not drawn according to the actual proportion relationship. The technology, method and equipment known to the person skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the technology, method and equipment should be regarded as part of the authorized specification. In all examples shown and discussed here, any specific value should be interpreted as only exemplary and not as a limitation. Therefore, other examples of example embodiments can have different values. It should be noted that similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0035] As shown in Figure 1 , when the pattern sewing machine sews a nonlinear pattern on the cloth, the process that the needle support mechanism 3 drives the needle bar mechanism 1 to move in the first direction X presents as a forward inclined line segment on the cloth, and the process that the needle support mechanism 3 drives the needle bar mechanism 1 to move reversely in the first direction X presents as a reverse inclined line segment on the cloth.

[0036] As shown in Figures 2-8 , the pattern sewing machine comprises a needle bar mechanism 1, a driving mechanism 2, a needle support mechanism 3, a pattern driving mechanism 42, a rack 6,

[0037] The needle bar mechanism 1 can sew a line on the cloth in the vertical movement process, as shown in Figure 6 , the needle bar mechanism 1 comprises a rod body 101;

[0038] The driving mechanism 2 is used for driving the needle bar mechanism 1 to vertically reciprocate;

[0039] The needle support mechanism 3 can drive the needle bar mechanism 1 to horizontally move, and the needle support mechanism 3 comprises a needle support 301, the upper end of the needle support 301 is rotationally connected with the rack 6, as shown in Figure 8 , the upper end and the lower end of the needle support 301 are both provided with mounting blocks protruding from the needle support 301, both the mounting blocks are provided with through holes 303, the two through holes 303 are coaxially distributed, the needle support 301 is sleeved outside the rod body 101 through the two through holes 303, and the rod body 101 can move in the vertical direction in the through hole 303, while the needle support 301 can drive the rod body 101 to horizontally move through the two through holes 303;

[0040] As shown in Figure 2 , the pattern driving mechanism 42 comprises a pattern cam 401, a swing claw 402, a spring 403, a swing shaft 404 and a connecting rod 405, the swing shaft 404 is rotationally connected with the rack 6, one end of the connecting rod 405 is connected with the swing shaft 404, the other end of the connecting rod 405 is connected with the lower end of the needle support 301, one end of the swing claw 402 is connected with the swing shaft 404, the other end of the swing claw 402 is in contact with the outer surface of the pattern cam 401, the spring 403 is arranged on the swing shaft 404, the pattern cam 401 is provided with protrusions with different arc lengths at intervals in the circumferential direction, so that the surface of the pattern cam 401 presents protruding areas and recessed areas, when the contact point of the swing claw 402 and the pattern cam 401 moves from the recessed area to the protruding area, the swing claw 402 swings away from the pattern cam 401 and drives the needle support mechanism 3 to move in the first direction X, and simultaneously extrudes the spring 403; when the contact point of the swing claw 402 and the pattern cam 401 moves from the protruding area to the recessed area, the spring 403 drives the swing claw 402 to swing towards the pattern cam 401, and simultaneously drives the needle support mechanism 3 to move reversely in the first direction X;

[0041] The "machine frame 6" in the utility model can be understood as a structure that is relatively stationary with the shell of the sewing machine, can be a plurality of part structures in the sewing machine, and is not intended to refer to the same structure. When the sewing function or state of the sewing machine is switched, one or more of these machine frames 6 can move relative to the shell of the sewing machine. For example, the machine frame 6 connected with the needle support 301 can be a pressure rod support, and the machine frame 6 connected with the swing shaft 404 can be a cam connecting plate. These structures are well known to those skilled in the art and are not the design points of the utility model, and will not be described here.

[0042] Embodiment 1

[0043] The embodiment provides a sewing track limiting structure of a pattern sewing machine. On the basis of an existing pattern sewing machine, the embodiment further adds a gear position mechanism. The gear position mechanism is arranged on one side of the needle support mechanism 3 in the first direction X. The needle support mechanism 3 is in contact with the gear position mechanism when the swing claw 402 is separated from the raised area of the pattern cam 401.

[0044] For details, please refer to Figure 6 The gear position mechanism comprises a guide frame plate 5. The guide frame plate 5 is located below the needle support 301 and is connected with the machine frame 6. For details, please refer to Figure 7 The guide frame plate 5 is provided with a guide groove 501 for the needle support mechanism 3 to move along the first direction X. The guide frame plate 5 is provided with an extension block 502 perpendicular to the first direction X.

[0045] Correspondingly, please refer to Figure 8 The needle support 301 is provided with a sliding part 302 in sliding connection with the guide groove 501. The sliding part 302 can reciprocate along the first direction X in the guide groove 501.

[0046] More specifically, the extension block 502 is provided with a threaded hole. The axis of the threaded hole can be parallel to the first direction X or can form a certain inclination angle with the first direction X. The extension block 502 is connected with an adjusting screw 503. The threaded end of the adjusting screw 503 is in threaded connection with the threaded hole. After the threaded end of the adjusting screw 503 passes through the threaded hole, the threaded end can be in contact with the needle support mechanism 3.

[0047] In the embodiment, when the needle support mechanism 3 moves to the farthest distance in the first direction X, the needle support 301 can be in contact with the threaded end of the adjusting screw 503. At this time, the adjusting screw 503 can block the needle support mechanism 3 from continuing to move in the first direction X. At this time, it is also the critical point at which the swing claw 402 is separated from the raised area of the pattern cam 401. In this way, the overconsumption of the spring 403 is avoided, and the service life of the spring 403 is prolonged.

[0048] Embodiment 2

[0049] The embodiment provides a sewing track limiting structure of a pattern sewing machine.

[0050] In the prior art, the needle support 301 is formed by first bending the upper and lower ends of an iron sheet to form mounting blocks, and then drilling through holes 303 in the two mounting blocks; this processing mode is difficult to guarantee the coaxiality of the two through holes 303, and deviation often exists in the coaxiality of the two through holes 303, so that the wear between the rod body 101 and the needle support 301 is aggravated.

[0051] In the embodiment, the needle support 301 is made through an injection molding process, a mold corresponding to the needle support 301 is made, and the needle support 301 is formed through the mold once, so that the two through holes 303 on the needle support 301 are coaxial each time, and the defective rate of the needle support 301 is reduced.

[0052] The embodiments of the utility model are described above in combination with the drawings, the embodiments and the features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above-mentioned specific implementation, the above-mentioned specific implementation is only illustrative, and is not restrictive, and the person skilled in the art can make many forms under the inspiration of the application without departing from the range protected by the application and the claims, and all belong to the protection of the application.

Claims

1. A sewing track limiting structure of a pattern sewing machine, comprising: a needle bar mechanism (1) capable of sewing a thread on a cloth during vertical movement; a driving mechanism (2) for driving the needle bar mechanism (1) to vertically reciprocate; a needle supporting mechanism (3) capable of moving the needle bar mechanism (1) horizontally; a pattern driving mechanism (4) (2) comprising a pattern cam (401), a swing claw (402) and a spring (403), wherein the swing claw (402) swings away from the pattern cam (401) to drive the needle supporting mechanism (3) to move in a first direction (X) and press the spring (403); characterized in that further comprising a gear mechanism, which is arranged on one side of the needle supporting mechanism (3) in the first direction (X) and contacts the needle supporting mechanism (3) when the swing claw (402) is separated from a convex area of the pattern cam (401). Further comprising a frame (6), wherein the gear mechanism comprises a guide frame plate (5) connected with the frame (6), the guide frame plate (5) is provided with a guide groove (501) for the needle supporting mechanism (3) to move in the first direction (X), and the guide frame plate (5) is provided with an extension block (502) perpendicular to the first direction (X). The extension block (502) is provided with a threaded hole, an adjusting screw (503) is connected with the extension block (502), a threaded end of the adjusting screw (503) is threadedly connected with the threaded hole, and the threaded end of the adjusting screw (503) can contact the needle supporting mechanism (3) after penetrating through the threaded hole. The needle supporting mechanism (3) comprises a needle support (301), the needle support (301) is provided with a sliding part (302) slidably connected with the guide groove (501), the needle bar mechanism (1) comprises a rod body (101), the needle support (301) is provided with two through holes (303) for the rod body (101) to penetrate, the two through holes (303) are distributed in a vertical direction, and the two through holes (303) are coaxially distributed. The pattern driving mechanism (4) (2) further comprises a swing shaft (404) and a connecting rod (405), one end of the swing claw (402) away from the pattern cam (401) is connected with the swing shaft (404), one end of the connecting rod (405) is connected with the swing shaft (404), the other end of the connecting rod (405) is connected with a lower end of the needle support (301), and an upper end of the needle support (301) is rotatably connected with the frame (6). The needle support (301) is made by an injection molding process.

2. The sewing path limiting structure of the pattern sewing machine according to claim 1, characterized by: ​ 3. The sewing path limiting structure of the pattern sewing machine according to claim 2, characterized in that: ​ 4. The stitch track limiting structure of the pattern sewing machine according to claim 2 or 3, characterized in that: ​ 5. The stitch track limiting structure of the pattern sewing machine according to claim 4, wherein: ​ 6. The stitch track limiting structure of the pattern sewing machine according to claim 4, wherein: ​

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