Tongue plate fixing device and sewing machine

Abstract

The application relates to the technical field of clothing bagging, in particular to a tongue plate fixing device and a sewing machine. The tongue plate fixing device comprises a mounting seat, a limiting piece and a tongue plate fixing assembly. The mounting seat is used for being mounted on a main frame, and a limiting portion is arranged on the mounting seat. The limiting piece is arranged on the mounting seat. The tongue plate fixing assembly is arranged at one end of the mounting seat away from the main frame. A connecting shaft, which is at least partially inserted into the mounting seat, is arranged on the tongue plate fixing assembly, and the tongue plate fixing assembly is used for connecting a tongue plate. A matching portion is formed on the tongue plate fixing assembly. The matching portion can form limiting cooperation with the limiting portion to limit the circumferential displacement of the tongue plate fixing assembly along the connecting shaft. The limiting piece is in abutment with the connecting shaft to limit the axial displacement of the tongue plate fixing assembly along the connecting shaft. The tongue plate limiting mode of the application will not cause screw loosening due to factors such as vibration and long-term load, so the tongue plate position will not be deviated, and the bagging quality can be kept stable.

Description

Technical Field

[0001] This application relates to the field of garment patchwork technology, and in particular to a tongue plate fixing device and a sewing machine. Background Technology

[0002] In the production and application of sewing machines, the tongue plate is one of the key functional components, and its installation and fixing method directly affects the assembly efficiency, operational stability, and ease of maintenance of the equipment. In traditional sewing machine designs, the tongue plate needs to be fixed circumferentially and axially to ensure its precise positioning and prevent loosening during machine operation.

[0003] In existing technologies, a "double screw connection" fixing method is typically used to achieve circumferential and axial fixation of the tongue plate, utilizing the thread engagement force to simultaneously restrict the circumferential rotation and axial displacement of the tongue plate. However, this fixing method relies solely on the threaded connection of the screws for fixation, so its stability depends on the fitting accuracy of the screws and screw holes and the tightening torque. In actual use, factors such as vibration and long-term load can easily cause the screws to loosen, leading to tongue plate displacement and reduced bag-sealing quality. Utility Model Content

[0004] Therefore, it is necessary to provide a tongue plate fixing device that can solve the above problems.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] A tongue plate fixing device is used to fix a tongue plate on the main frame of a sewing machine, the tongue plate fixing device comprising:

[0007] Mounting base for mounting on the main frame, and the mounting base is provided with a limiting part;

[0008] A limiting element is provided on the mounting base;

[0009] A tongue plate fixing assembly is disposed at one end of the mounting base away from the main frame. The tongue plate fixing assembly is provided with a connecting shaft that is at least partially inserted into the mounting base and is used to connect the tongue plate. A mating part is formed on the tongue plate fixing assembly, and the mating part can form a limiting fit with the limiting part to limit the circumferential displacement of the tongue plate fixing assembly along the connecting shaft.

[0010] The limiting member abuts against the connecting shaft to restrict the axial displacement of the tongue plate fixing assembly along the connecting shaft.

[0011] It is understood that this application achieves dual limiting of the tongue plate fixing component by setting a limiting member and a tongue plate fixing assembly installed on the mounting base. The limiting part on the mounting base and the mating part on the tongue plate fixing assembly form a limiting fit, thereby limiting the tongue plate fixing assembly circumferentially. The limiting member also limits the tongue plate fixing assembly axially, thereby achieving dual limiting of the tongue plate fixing assembly. This limiting method will not cause the screws to loosen due to factors such as vibration and long-term load, so the tongue plate position will not shift, and the bag-applying quality can remain stable.

[0012] In one embodiment, one of the limiting portion and the mating portion is a protrusion, and the other is a groove that mates with the protrusion, with the protrusion inserted into the groove.

[0013] In one embodiment, the cross-sectional area of ​​the groove gradually decreases along the direction from the opening of the groove to the bottom of the groove.

[0014] In one embodiment, the first sidewall of the groove is a slope.

[0015] In one embodiment, the tongue plate fixing assembly includes a tongue plate fixing seat and a tongue plate connector. The tongue plate fixing seat is provided with the connecting shaft and the mating part. One end of the tongue plate connector is connected to the tongue plate fixing seat, and the other end is used to connect to the tongue plate.

[0016] In one embodiment, the limiting member is configured as a cylinder, the cylinder including an output shaft capable of abutting against the connecting shaft.

[0017] In one embodiment, an annular groove is formed on the connecting shaft around the axis, the annular groove has a bottom wall, and an arc-shaped surface is formed at one end of the output shaft near the connecting shaft. When the output shaft extends, the arc-shaped surface extends into the annular groove and abuts against the bottom wall.

[0018] It is understandable that by setting an arc-shaped surface on the output shaft, the output shaft abuts against the connecting shaft through the arc-shaped surface, so that the output shaft and the connecting shaft abut against each other through surface-to-surface contact, which can increase the contact area between the output shaft and the connecting shaft, thereby making the fixation of the output shaft to the connecting shaft more stable.

[0019] In one embodiment, the annular groove has a second sidewall configured as an inclined surface, and the distance between the second sidewalls gradually increases as they move away from the axis of the connecting shaft. A chamfer is formed on the output shaft, and the chamfer can engage with the second sidewall.

[0020] This application also provides the following technical solutions:

[0021] A sewing machine includes a main frame, a tongue plate, and a tongue plate fixing device as described in any of the above embodiments.

[0022] In one embodiment, the main frame includes a frame body, two telescopic plates and two tongue plates. The telescopic plates are installed on the frame body, and the two tongue plates are respectively fixed to the corresponding telescopic plates by tongue plate fixing devices. The two telescopic plates can move closer to or further away from each other, so as to drive the two tongue plates to move closer to or further away from each other.

[0023] Compared with the prior art, the tongue plate fixing device has a limiting member and a tongue plate fixing assembly installed on the mounting base. The limiting part on the mounting base and the mating part on the tongue plate fixing assembly form a limiting fit, which limits the tongue plate fixing assembly circumferentially. The limiting member also limits the tongue plate fixing assembly axially, thus achieving double limiting of the tongue plate fixing assembly. This limiting method will not cause the screws to loosen due to vibration, long-term load or other factors, so the tongue plate position will not shift and the bag-sealing quality can remain stable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural diagram of the sewing machine provided in this application.

[0026] Figure 2 This is a schematic diagram of the tongue plate fixing device provided in this application.

[0027] Figure 3 A side view of the tongue plate fixing device provided in this application.

[0028] Figure 4 For this application Figure 3 Sectional view at point AA.

[0029] Figure 5 An exploded view of the tongue plate fixing device provided in this application.

[0030] Figure 6 An exploded view of the tongue plate fixing device provided in this application from another perspective.

[0031] The component labels are as follows:

[0032] 100. Tongue plate fixing device; 10. Mounting base; 11. Limiting part; 111. Protrusion; 20. Limiting component; 21. Cylinder; 211. Output shaft; 212. Arc-shaped surface; 213. Chamfer; 30. Tongue plate fixing assembly; 31. Connecting shaft; 311. Annular groove; 312. Bottom wall; 313. Second side wall; 32. Mating part; 321. Groove; 322. Slot opening; 323. Slot bottom; 324. First side wall; 33. Tongue plate fixing base; 34. Tongue plate connecting component;

[0033] 200. Sewing machine; 201. Main frame; 202. Tongue plate; 203. Frame body; 204. Telescopic plate; 205. Drive unit; 206. Tooth plate. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0039] Please see Figures 1 to 6 This application provides a tongue plate fixing device 100, which is applied to a sewing machine 200 and installed on the main frame 201 of the sewing machine 200 to fix a tongue plate 202 to the main frame 201. This tongue plate fixing device 100 can be applied to any scenario on the sewing machine where a tongue plate needs to be fixed. In this application, the tongue plate fixing device 100 is disposed on a sewing machine 200 having two tongue plates 202, and the two tongue plates 202 can extend and retract, moving away from each other when extended and moving closer together when retracted, to sew a gathered pocket on the fabric.

[0040] Specifically, the tongue plate fixing device 100 includes: a mounting base 10, a limiting member 20, and a tongue plate fixing assembly 30. The mounting base 10 is used to be mounted on the main frame 201, and the mounting base 10 is provided with a limiting part 11. The limiting member 20 is disposed on the mounting base 10. The tongue plate fixing assembly 30 is disposed at one end of the mounting base 10 away from the main frame 201. The tongue plate fixing assembly 30 is provided with a connecting shaft 31 that is at least partially inserted into the mounting base 10 and is used to connect the tongue plate 202. The tongue plate fixing assembly 30 has a mating part 32, which can form a limiting fit with the limiting part 11 to limit the circumferential displacement of the tongue plate fixing assembly 30 along the connecting shaft 31. The limiting member 20 abuts against the connecting shaft 31 to limit the axial displacement of the tongue plate fixing assembly 30 along the connecting shaft 31.

[0041] In the prior art, two screws are usually used to fix the tongue plate 202. When applied to a sewing machine 200 with two tongue plates 202, since the tongue plates 202 need to be able to move relative to each other according to the usage requirements, this fixing method is not stable enough and the screws are prone to loosening due to vibration, long-term load and other factors. On the other hand, the structure with two tongue plates 202 requires two screws to be set on each tongue plate 202 when fixing, so the size requirements of the tongue plate 202 are high, which may cause the tongue plate 202 to interfere with the surrounding structure. This application achieves dual limiting of the tongue plate fixing assembly 30 by setting a limiting member 20 and a tongue plate fixing assembly 30 installed on the mounting base 10. The limiting part 11 on the mounting base 10 and the mating part 32 on the tongue plate fixing assembly 30 form a limiting engagement, thereby limiting the tongue plate fixing assembly 30 circumferentially. The limiting member 20 also limits the tongue plate fixing assembly 30 axially, thus achieving dual limiting of the tongue plate fixing assembly 30. This limiting method will not cause the screws to loosen due to vibration, long-term load, etc., so the position of the tongue plate 202 will not shift, and the bag-sealing quality can remain stable. In addition, the shape of the tongue plate fixing device 100 can be adjusted according to the usage requirements, thereby avoiding interference between the tongue plate 202 and the surrounding structure, and improving the flexibility of use.

[0042] like Figures 2 to 6 As shown, the limiting component 20 is configured as a cylinder 21, which includes an output shaft 211 that can abut against the connecting shaft 31. Thus, by using a cylinder and its output shaft to limit the connecting shaft, disassembly is not only convenient, but installation and disassembly are also quicker and more efficient. Furthermore, it avoids the problem of fit failure due to loose screws after prolonged use.

[0043] In one embodiment, an annular groove 311 is formed on the connecting shaft 31 around its axis. The annular groove 311 has a bottom wall 312. An arc-shaped surface 212 is formed at the end of the output shaft 211 near the connecting shaft 31. When the output shaft 211 extends, the arc-shaped surface 212 extends into the annular groove 311 and abuts against the bottom wall 312. It can be understood that the bottom wall 312 of the annular groove 311 is a circumferential surface, i.e., an arc-shaped surface. The arc-shaped surface 212 of the output shaft 211 and the bottom wall 312 of the annular groove 311 can engage in a surface-to-surface contact. Therefore, by providing an arc-shaped surface 212 on the output shaft 211, the output shaft 211 abuts against the connecting shaft 31 through the arc-shaped surface 212, allowing the output shaft 211 and the connecting shaft 31 to abut against each other through surface-to-surface contact. This increases the contact area between the output shaft 211 and the connecting shaft 31, thereby making the fixation of the output shaft 211 to the connecting shaft 31 more stable.

[0044] Furthermore, the annular groove 311 has a second sidewall 313, which is configured as an inclined surface. The distance between the second sidewalls 313 gradually increases as they move away from the axis of the connecting shaft 31. A chamfer 213 is formed on the output shaft 211, which can mate with the second sidewall 313. By providing a chamfer 213 on the output shaft 211 and using the chamfer 213 to abut against the second sidewall 313, the area of ​​the output shaft 211 and the connecting shaft 31 is further increased, thereby increasing the friction between them. Therefore, the limiting of the output shaft 211 on the connecting shaft 31 is more stable.

[0045] like Figure 5 and Figure 6 As shown, one of the limiting part 11 and the mating part 32 is a protrusion 111, and the other is a groove 321 that mates with the protrusion 111. The protrusion 111 is inserted into the groove 321. By providing a structure in which the protrusion 111 and the groove 321 mate, the tongue plate fixing assembly 30 is circumferentially limited relative to the mounting base 10, preventing the tongue plate fixing assembly 30 from rotating relative to the mounting base 10. In this embodiment, the limiting part 11 is configured as a protrusion 111, and the mating part 32 is configured as a groove 321.

[0046] Furthermore, along the direction from the opening 322 to the bottom 323 of the groove 321, the cross-sectional area of ​​the groove 321 gradually decreases. Thus, by configuring the groove 321 as a flared structure, the flared opening of the groove 321 can guide the protrusion 111 of the mounting base 10 into the groove 321 when installing the tongue plate fixing assembly 30, facilitating the installation of the tongue plate fixing assembly 30 on the mounting base 10. It should be noted that the groove 321 here is not limited to one; multiple grooves can be configured, such as two, three, or four. Correspondingly, the protrusions 111 should also be set to a number corresponding to the grooves 321.

[0047] In one embodiment, the first sidewall 324 of the groove 321 is an inclined surface. Here, the inclined surface can be an inclined plane or an inclined curved surface, as long as the protrusion 111 and the first sidewall 324 of the groove 321 can remain in contact to limit the tongue plate fixing assembly 30.

[0048] In this embodiment, the groove 321 is configured as a trapezoidal through groove extending along the main frame 201, and the protrusion 111 is configured as a three-dimensional trapezoidal boss. Through the simple cooperation of the trapezoidal through groove and the trapezoidal boss, the tongue plate fixing assembly 30 and the mounting base 10 are kept in a stable circumferential position, which facilitates the preparation of the mounting base 10 and the tongue plate fixing assembly 30.

[0049] like Figures 1 to 6As shown, the tongue plate fixing assembly 30 includes a tongue plate fixing seat 33 and a tongue plate connector 34. The tongue plate fixing seat 33 is provided with a connecting shaft 31 and a mating part 32. One end of the tongue plate connector 34 is connected to the tongue plate fixing seat 33, and the other end is used to connect to the tongue plate 202. Here, the tongue plate fixing seat 33 and the tongue plate connector 34, and the tongue plate connector 34 and the tongue plate 202, can be fixed by snap-fit, threaded connection, interference fit, or other methods. The tongue plate connector 34 and the tongue plate fixing seat 33 can also be manufactured using an integral molding process; users can choose the appropriate manufacturing method according to their needs.

[0050] This application also provides the following technical solutions:

[0051] A sewing machine 200 includes a main frame 201, a tongue plate 202, and a tongue plate fixing device 100 as described in any of the above embodiments.

[0052] like Figure 1 As shown, in one embodiment, the main frame 201 includes a frame 203, two telescopic plates 204 and two tongue plates 202. The telescopic plates 204 are installed on the frame 203, and the two tongue plates 202 are respectively fixed to the corresponding telescopic plates 204 by tongue plate fixing devices 100. The two telescopic plates 204 can move closer or further away from each other, so as to drive the two tongue plates 202 to move closer or further away from each other.

[0053] In one embodiment, the main frame 201 is provided with a guide mechanism (not shown) and a drive member 205. The drive member 205 is connected to two telescopic plates 204 respectively, and can drive the two telescopic plates 204 to extend or retract synchronously relative to the frame 203. The guide mechanism enables the two telescopic plates 204 to move away from each other when extending synchronously relative to the frame 203, and to move closer to each other when retracting synchronously. Here, the guide mechanism can be configured as a slide rail and groove, a protrusion and guide slot, or a guide hole and guide block, etc. Such structures are common in the prior art and will not be described in detail here.

[0054] Preferably, the drive component 205 is configured as a gear, and a toothed plate 206 connected to the telescopic plate 204 is provided on the frame 203. The gear drives the toothed plate 206 to move back and forth, thereby driving the telescopic plate 204 to extend and retract, and in turn driving the tongue plate 202 to extend and retract. Under the action of the guide mechanism, the two telescopic plates 204 move away from each other when they extend synchronously relative to the frame 203, and move closer to each other when they retract synchronously.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A tongue plate fixing device for fixing a tongue plate (202) on the main frame (201) of a sewing machine (200), characterized in that, The tongue plate fixing device (100) includes: Mounting base (10) is used to mount on the main frame (201), and the mounting base (10) is provided with a limiting part (11). A limiting member (20) is disposed on the mounting base (10); A tongue plate fixing assembly (30) is disposed at one end of the mounting base (10) away from the main frame (201). The tongue plate fixing assembly (30) is provided with a connecting shaft (31) that is at least partially inserted into the mounting base (10) and is used to connect the tongue plate (202). A mating part (32) is formed on the tongue plate fixing assembly (30). The mating part (32) can form a limiting fit with the limiting part (11) to limit the circumferential displacement of the tongue plate fixing assembly (30) along the connecting shaft (31). The limiting member (20) abuts against the connecting shaft (31) to limit the axial displacement of the tongue plate fixing assembly (30) along the connecting shaft (31).

2. The tongue plate fixing device according to claim 1, characterized in that, One of the limiting part (11) and the mating part (32) is a protrusion (111), and the other is a groove (321) that mates with the protrusion (111). The protrusion (111) is inserted into the groove (321).

3. The tongue plate fixing device according to claim 2, characterized in that, Along the direction from the opening (322) of the groove (321) to the bottom (323) of the groove (321), the cross-sectional area of ​​the groove (321) gradually decreases.

4. The tongue plate fixing device according to claim 3, characterized in that, The first sidewall (324) of the groove (321) is an inclined surface.

5. The tongue plate fixing device according to claim 1, characterized in that, The tongue plate fixing assembly (30) includes a tongue plate fixing seat (33) and a tongue plate connector (34). The tongue plate fixing seat (33) is provided with the connecting shaft (31) and the mating part (32). One end of the tongue plate connector (34) is connected to the tongue plate fixing seat (33), and the other end is used to connect to the tongue plate (202).

6. The tongue plate fixing device according to claim 1, characterized in that, The limiting member (20) is configured as a cylinder (21), the cylinder (21) including an output shaft (211) which can abut against the connecting shaft (31).

7. The tongue plate fixing device according to claim 6, characterized in that, An annular groove (311) is formed on the connecting shaft (31) around the axis. The annular groove (311) has a bottom wall (312). An arc-shaped surface (212) is formed at one end of the output shaft (211) near the connecting shaft (31). When the output shaft (211) extends out, the arc-shaped surface (212) extends into the annular groove (311) and abuts against the bottom wall (312).

8. The tongue plate fixing device according to claim 7, characterized in that, The annular groove (311) has a second sidewall (313) configured as an inclined surface, and the distance between the second sidewalls (313) gradually increases as it moves away from the axis of the connecting shaft (31). A chamfer (213) is formed on the output shaft (211), and the chamfer (213) can cooperate with the second sidewall (313).

9. A sewing machine, characterized in that, It includes a main frame (201), a tongue plate (202), and a tongue plate fixing device (100) as described in any one of claims 1-8.

10. The sewing machine according to claim 9, characterized in that, The main frame (201) includes a frame (203), two telescopic plates (204) and two tongue plates (202). The telescopic plates (204) are installed on the frame (203). The two tongue plates (202) are respectively fixed to the corresponding telescopic plates (204) by the tongue plate fixing device (100). The two telescopic plates (204) can move closer or further away from each other, so as to drive the two tongue plates (202) to move closer or further away from each other.

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