A keyhole machine facilitating positioning

Abstract

This utility model discloses a buttonhole machine that is easy to position; it belongs to the technical field of buttonhole machines; its key features include a base, on which a buttonhole main unit and a reciprocating platform for placing fabric are provided. The reciprocating platform is provided with a limiting baffle perpendicular to the direction of movement. A mounting bracket is hinged to both ends of each limiting baffle. A pressure roller made of metal material is provided on the mounting bracket. A magnetic suction piece is provided on the reciprocating platform opposite to the pressure roller. This utility model aims to provide a buttonhole machine with a simple structure and reduced fabric displacement that is easy to position; it is used for sewing buttonholes in fabric.

Description

Technical Field

[0001] This utility model relates to a keyhole machine, and more specifically, to a keyhole machine that is easy to position. Background Technology

[0002] Buttonhole machines are mainly used to process buttonholes in various garments. Existing buttonhole machines require pre-positioning of the buttonhole during use. The usual practice is to manually use a pen to carve the buttonhole position to form the buttonhole opening position, and then use the buttonhole machine to punch the hole at the marked buttonhole opening position.

[0003] During the keyhole process, a positioning structure is needed to fix the fabric in place to prevent it from moving and affecting the keyhole's appearance. However, existing positioning structures, after pressing and positioning the fabric, tend to fix any wrinkles to the surface, affecting the fabric's aesthetics. Furthermore, the positioning structure needs to loosen the fabric before it can be moved, leaving it unrestricted and prone to shifting during translation, affecting the keyhole's position. This necessitates repositioning the fabric for subsequent keyhole operations.

[0004] In the utility model patent application CN221837215U, the buttonhole machine positioning structure described in the specification uses a bidirectional lead screw and an adjusting motor to move a flat roller with an embedded metal strip to flatten the fabric. The metal strip then attracts a magnetic strip, causing the flat roller to press the fabric firmly. This structure is relatively complex. Furthermore, if the adjusting motor does not stop in time when the flat roller reaches the magnetic strip, the flat roller may move outside the magnetic strip, resulting in failed attraction and inability to press the fabric firmly. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a simple buttonhole machine that reduces fabric displacement and facilitates positioning.

[0006] The technical solution of this utility model is implemented as follows: a buttonhole machine that is easy to position includes a base, on which a buttonhole host and a reciprocating platform for placing fabric are provided. The reciprocating platform is provided with a limiting baffle perpendicular to the direction of movement. Mounting suspensions are hinged to both ends of each limiting baffle. A pressure roller made of metal material is provided on the mounting suspension. A magnetic suction piece is provided on the reciprocating platform opposite to the pressure roller.

[0007] In the aforementioned easy-to-position buttonhole machine, the end of the mounting suspension is provided with a mounting plate, and a mounting roller frame is provided on the mounting plate via a guide rod. The pressure roller is mounted on the mounting roller frame. A tension spring is provided on the guide rod between the mounting roller frame and the mounting plate.

[0008] In the aforementioned easy-to-position keyhole machine, the hinged part between the mounting suspension and the limiting baffle is provided with a torsion spring.

[0009] In the aforementioned easy-to-position keyhole machine, the reciprocating platform is provided with several adjusting elongated holes, and the base is provided with relief grooves corresponding to the adjusting elongated holes; the limiting baffle is provided with adjusting seats corresponding to the adjusting elongated holes one by one, and adjusting studs that cooperate with the adjusting elongated holes are threadedly connected to the adjusting seats; the end of the adjusting stud located in the relief groove is provided with a clamping end plate.

[0010] With the above-described structure, this invention uses a pressure roller and a magnetic clasp to press and hold the fabric in place during buttonhole making, preventing fabric shifting during the reciprocating platform's movement. When it's necessary to move the fabric to the next buttonhole, the limiting baffles on both sides restrict the fabric's movement in the reciprocating platform's direction, allowing for quick alignment of the next buttonhole position with the sewing needle.

[0011] Meanwhile, during the translation process, the pressure rollers continuously press down on both ends of the fabric to keep the fabric taut, reducing the formation of wrinkles, and the fabric can smooth out the wrinkles as it passes through the pressure rollers. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 3 This is a side view of the structure of this utility model.

[0016] Figure 4 This is a partial structural diagram of point A of this utility model.

[0017] In the diagram: 1. Base; 2. Keyhole main unit; 3. Reciprocating platform; 4. Limiting baffle; 5. Mounting suspension; 6. Pressure roller; 7. Magnetic suction plate; 8. Mounting plate; 9. Guide rod; 10. Mounting roller frame; 11. Tension spring; 12. Torsion spring; 13. Adjusting elongated hole; 14. Relief groove; 15. Adjusting seat; 16. Adjusting stud; 17. Clamping end plate. Detailed Implementation

[0018] See Figure 1-4As shown, this utility model discloses a buttonhole machine for easy positioning, comprising a base 1, on which a buttonhole main unit 2 and a reciprocating platform 3 for placing fabric are mounted. The reciprocating platform 3 is provided with limiting baffles 4 perpendicular to the direction of movement. Mounting brackets 5 are hinged to both ends of each limiting baffle 4. Metal pressure rollers 6 are mounted on the mounting brackets 5. Magnetic suction plates 7 are provided on the reciprocating platform 3 opposite to the pressure rollers 6. The buttonhole main unit and reciprocating platform are existing technologies. The fabric is placed on the reciprocating platform and works with the sewing needle on the buttonhole main unit to make a buttonhole. Its specific structure is common knowledge to those skilled in the art and will not be described in detail here.

[0019] After the metal pressure roller is attracted to the magnetic plate, it can only rotate when subjected to a large drag force. However, the force generated by the sewing needle of the keyhole machine in contact with the fabric is insufficient to make it rotate, thus fixing the fabric in place.

[0020] When making buttonholes, the fabric is pressed firmly by a pressure roller and a magnetic clasp to prevent it from shifting during the reciprocating platform's movement. When it is necessary to move the fabric to the next buttonhole, the limiting baffles on both sides limit the fabric in the direction of the reciprocating platform's movement, allowing for quick alignment of the next buttonhole position with the sewing needle.

[0021] Meanwhile, during the translation process, the pressure rollers continuously press down on both ends of the fabric to keep the fabric taut, reducing the formation of wrinkles, and the fabric can smooth out the wrinkles as it passes through the pressure rollers.

[0022] In this embodiment, the mounting suspension 5 has a mounting plate 8 at one end, and a mounting roller frame 10 is mounted on the mounting plate 8 via a guide rod 9. The pressure roller 6 is mounted on the mounting roller frame 10. A tension spring 11 is provided on the guide rod 9 between the mounting roller frame 10 and the mounting plate 8. The tension spring increases the pressure of the pressure roller, ensuring a stable positioning effect and reducing the possibility of fabric shifting during the reciprocating platform movement. Simultaneously, when the fabric is dragged for translation, the tension spring provides a certain upward movement space for the pressure roller, preventing excessive adhesion between the pressure roller and the magnetic plate from preventing the fabric from being dragged.

[0023] In this embodiment, preferably, a torsion spring 12 is provided at the hinge joint between the mounting suspension 5 and the limiting baffle 4. This structure facilitates the opening and closing of the mounting suspension without requiring additional fixing structures, thus simplifying the operation.

[0024] In this embodiment, the reciprocating platform 3 is provided with a plurality of adjusting elongated holes 13, and the base 1 is provided with relief grooves 14 corresponding to the adjusting elongated holes 13; the limiting baffle 4 is provided with adjusting seats 15 corresponding to the adjusting elongated holes 13 one by one, and adjusting studs 16 that cooperate with the adjusting elongated holes 13 are threadedly connected to the adjusting seats 15; one end of the adjusting stud 16 located in the relief groove 14 is provided with a clamping end plate 17. The position of the limiting baffle is adjusted by cooperating with the adjusting elongated holes and the adjusting studs to accommodate fabrics of different sizes.

[0025] During operation, one side of the mounting bracket is opened, and the fabric to be buttoned is laid out on the reciprocating platform. The mounting bracket returns to its original position under the action of the torsion spring, causing the pressure roller and magnetic strip to clamp the fabric. The front end of the fabric is dragged until it engages with the pressure roller on the other side, aligning the buttoning position with the stitching needle on the buttonhole machine. The reciprocating platform and the buttonhole machine then button the fabric. After completing one buttonhole, the front end of the fabric is dragged until the next buttonhole position is aligned with the stitching needle on the buttonhole machine, repeating this process multiple times to complete the buttonhole operation.

[0026] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.

Claims

1. A buttonhole machine for easy positioning, comprising a base (1), wherein a buttonhole host (2) and a reciprocating platform (3) for placing fabric are provided on the base (1), characterized in that, The reciprocating platform (3) is provided with a limiting baffle (4) perpendicular to the direction of movement. Each limiting baffle (4) is hinged to a mounting suspension (5) at both ends. The mounting suspension (5) is provided with a pressure roller (6) made of metal material. The reciprocating platform (3) opposite to the pressure roller (6) is provided with a magnetic suction piece (7).

2. The buttonhole machine for easy positioning according to claim 1, characterized in that, The mounting suspension (5) has a mounting plate (8) at its end. A mounting roller frame (10) is provided on the mounting plate (8) via a guide rod (9). The pressure roller (6) is mounted on the mounting roller frame (10). A tension spring (11) is provided on the guide rod (9) between the mounting roller frame (10) and the mounting plate (8).

3. A buttonhole machine for easy positioning according to claim 1, characterized in that, The hinge joint between the mounting suspension (5) and the limiting baffle (4) is provided with a torsion spring (12).

4. A buttonhole machine for easy positioning according to claim 1, characterized in that, The reciprocating platform (3) is provided with several adjusting elongated holes (13), and the base (1) is provided with a relief groove (14) corresponding to the adjusting elongated holes (13); the limiting baffle (4) is provided with adjusting seats (15) corresponding to the adjusting elongated holes (13), and the adjusting seats (15) are connected by threads to adjusting studs (16) that cooperate with the adjusting elongated holes (13); the adjusting studs (16) located in the relief groove (14) are provided with a clamping end plate (17).

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