Positioning presser foot with easy maintenance

Abstract

This invention provides a conveniently maintained positioning presser foot, comprising a presser foot bracket, a connecting block, a presser foot plate, and a limiting baffle. The connecting block is rotatably connected to the top of the presser foot bracket via a rotating shaft, and a spring is provided between the presser foot bracket and the connecting block. The bottom of the presser foot bracket has a mounting groove, and the top of the presser foot plate is fitted into this groove. A T-pin is provided on one side of the limiting baffle, and a rotation limiting hole is opened on the presser foot bracket. The T-pin passes through the rotation limiting hole, allowing the limiting baffle to be rotatably connected to the presser foot bracket. A spindle is located above the side of the presser foot bracket closest to the limiting baffle, and a torsion spring is fitted on the spindle. The two ends of the torsion spring are fixed to the presser foot bracket and the limiting baffle, respectively. This invention, by providing a mounting block on the top of the presser foot plate, utilizes the elastic deformation of the material to make the presser foot plate detachable, facilitating replacement and avoiding the inconvenience of replacing the entire presser foot assembly due to wear, thus reducing replacement costs.

Description

Technical Field

[0001] This utility model relates to a sewing machine presser foot, and more particularly to a positioning presser foot that is easy to maintain. Background Technology

[0002] To reduce costs, most existing sewing machine presser feet are made of plastic, with low-resistance materials covering the contact surface between the presser foot plate and the fabric. However, after prolonged use, the presser foot plate will wear down, leading to increased friction and requiring replacement. Currently, the presser foot plate and presser foot bracket are usually a single unit, requiring replacement as a whole. This is inconvenient for disassembly and assembly, and increases replacement costs. Especially for presser feet with positioning functions, the added positioning (or limit) baffles are often fixed with screws, which are also inconvenient to disassemble, and repeated disassembly can easily cause the screw holes to strip and fail. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The purpose of this utility model is to provide a positioning pressure foot that is easy to maintain, with both the pressure foot plate and the limiting baffle being detachable for convenient maintenance and replacement. To achieve the above objective, this utility model adopts the following technical solution:

[0005] (II) Technical Solution

[0006] A positioning presser foot that is easy to maintain includes a presser foot bracket, a connecting block, a presser foot plate, and a limit baffle, wherein:

[0007] The connecting block is rotatably connected to the top of the presser foot bracket via a rotating shaft, and a spring is provided between the presser foot bracket and the connecting block;

[0008] The bottom of the presser foot bracket is provided with a mounting groove, and the top of the presser foot plate is fitted into the mounting groove.

[0009] The limiting baffle includes a pressure plate and a positioning block. A T-pin is provided on the side of the pressure plate away from the positioning block. A rotation limiting hole is opened on the pressure foot bracket. The T-pin passes through the rotation limiting hole to make the limiting baffle rotatably connected to the pressure foot bracket.

[0010] The presser foot bracket has a spindle on the side near the limiting baffle, and a torsion spring is sleeved on the spindle. The two ends of the torsion spring are respectively fixed to the presser foot bracket and the limiting baffle.

[0011] Furthermore, the top of the presser foot bracket is provided with a receiving groove, the connecting block is placed in the receiving groove, and the rotating shaft passes through the side wall of the receiving groove and the connecting block.

[0012] Furthermore, a limiting block is provided on one side of the connecting block, and a stop block is provided on the top side of the presser foot bracket. When the connecting block rotates outward, the stop block will contact the limiting block.

[0013] Furthermore, both the presser foot bracket and the connecting block have pin holes for inserting pins.

[0014] Furthermore, the top of the mounting block extends backward to form a boss, and there are raised strips on both sides of the middle part. The shape of the mounting groove is the same as that of the mounting block.

[0015] Furthermore, both the presser foot bracket and the limiting baffle are provided with grooves or limiting holes for accommodating the torsion spring.

[0016] (III) Beneficial Effects

[0017] This utility model has significant advantages and beneficial effects compared with the prior art, specifically:

[0018] 1. By setting an installation block on the top of the presser foot plate, the elastic deformation of the material is used to make the presser foot plate a detachable design, which is convenient for replacement. This avoids the inconvenience of replacing the entire presser foot assembly due to wear of the presser foot plate and reduces replacement costs.

[0019] 2. Use T-pins to install the limit baffles for easy disassembly, and then use limit baffles of different widths according to actual needs;

[0020] 3. Both the presser foot bracket and the connecting block have pin holes for inserting pins. Align the pin holes on the presser foot bracket and the connecting block and insert the pin (a machine needle can be used instead) to fix the presser foot bracket and thus achieve the wrinkling function. Attached Figure Description

[0021] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure from another angle of Embodiment 1;

[0024] Figure 3 This is a side view of the embodiment;

[0025] Figure 4 This is an exploded view of Example 1;

[0026] Figure 5 This is a schematic diagram of the overall structure after the limit baffle was replaced in Embodiment 1;

[0027] Figure 6 This is a schematic diagram of the external structure of the pressure foot plate in Embodiment 1;

[0028] Figure 7 This is a schematic diagram of the external structure of the presser foot bracket in the first embodiment, viewed from below.

[0029] Figure 8 This is a schematic diagram of the overall structure of Embodiment 2;

[0030] Figure 9 This is an exploded view of Example 2.

[0031] Explanation of icon numbers:

[0032] 1. Presser foot support; 11. Receiving groove; 12. Mandrel;

[0033] 13. Pin hole; 14. Rotation limiting hole; 15. Abutment block;

[0034] 16. Mounting slot; 2. Connecting block; 21. Limiting block;

[0035] 3. Pressure foot plate; 31. Mounting block; 32. Boss;

[0036] 33. Raised bar; 4. Limiting baffle; 41. T-pin;

[0037] 42. Pressure plate; 432. Positioning block; 5. Rotating shaft;

[0038] 6. Torsion spring; 7. Spring; 8. Pin. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] Please see Figures 1 to 7 As shown, a positioning presser foot that is easy to maintain includes a presser foot bracket 1, a connecting block 2, a presser foot plate 3, and a limiting baffle 4, wherein:

[0045] The presser foot bracket 1 has a receiving groove 11 at the top, a rotation limiting hole 14 that runs horizontally through the middle, and a mounting groove 16 at the bottom.

[0046] The connecting block 2 is used to connect with the connecting rod of the sewing machine. It is placed in the receiving groove 11 and rotatably connected to the presser foot bracket 1 via the rotating shaft 5. Simultaneously, as... Figure 3 and Figure 4 The receiving groove 11 has an outer opening and an inner spring 7. The spring 7 is in a compressed state and abuts between the presser foot bracket 1 and the connecting block 2, so that the presser foot plate 3 at the bottom of the presser foot bracket 1 presses the fabric tightly.

[0047] The pressure foot plate 3 is secured in the mounting groove 16 by the mounting block 31 at the top, specifically, as shown in the figure. Figure 6 and 7 As shown, the mounting block 31 extends rearward from the top to form a boss 32, and has protrusions 33 on both sides of the middle. The shape of the mounting groove 16 is the same as that of the mounting block 31. During installation, first insert the boss 32 end of the mounting block 31 into the corresponding end of the mounting groove 16, then press the pressure foot 3 in. The protrusions 33 will embed into the corresponding grooves in the mounting groove 16, thus preventing the pressure foot 3 from falling out, completing the installation. Disassembly is simple; just pull it out forcefully. This design utilizes the elastic deformation of the material through the structure of the mounting block 31 to make the pressure foot 3 a detachable design, facilitating replacement and avoiding the inconvenience of replacing the entire pressure foot assembly due to wear of the pressure foot 3, while also reducing replacement costs.

[0048] The limiting baffle 4 includes a pressure plate 42 and a positioning block 43. The pressure plate 42 is used to press the outer side of the fabric, and the positioning block 43 is engaged with a T-shaped pin 41 on the side of the pressure plate 42 away from the positioning block 43. The T-shaped pin 41 passes through the rotating limiting hole 14, allowing the limiting baffle 4 to be rotatably connected to the presser foot bracket 1. During assembly, the T-shaped pin 41 is aligned with the rotating limiting hole 14 and inserted. After the T-shaped part of the end of the T-shaped pin 41 extends out of the rotating limiting hole 14, the T-shaped pin 41 is rotated until its T-shaped part forms an angle (90° is optimal) with the rotating limiting hole 14. Figure 5 As shown. The design of the T-pin 41 makes the limiting baffle 4 easy to disassemble, and thus the limiting baffle 4 of different widths can be used according to actual needs. Figure 2 and Figure 5 These are limit baffles 4 of different widths.

[0049] To ensure the limiting baffle 4 presses the fabric firmly, the presser foot bracket 1 has a spindle 12 on the side near the limiting baffle 4. A torsion spring 6 is fitted onto the spindle 12, with both ends of the torsion spring 6 attached to the surfaces of the presser foot bracket 1 and the limiting baffle 4, respectively, keeping the limiting baffle 4 in a pressed-down state. Of course, both the presser foot bracket 1 and the limiting baffle 4 have grooves or limiting holes on their surfaces to accommodate the torsion spring 6, preventing loosening.

[0050] To prevent spring 7 from pushing out connecting block 2, such as Figure 3 The connecting block 2 is provided with a limiting block 21 on one side, and the pressure foot bracket 1 is provided with a stop block 15 on one side of the top. When the connecting block 2 rotates outward, the stop block 15 will contact the limiting block 21 to prevent the connecting block 2 from continuing to rotate and play a limiting role.

[0051] It is worth mentioning that, in order to achieve the wrinkling function, both the presser foot bracket 1 and the connecting block 2 have pin holes 13 for inserting pins 8. When wrinkling is required, align the pin holes 13 on the presser foot bracket 1 and the connecting block 2, insert the pins 8 (which can be replaced by a machine needle), and the presser foot bracket 1 will be fixed, thereby achieving the wrinkling function.

[0052] Example 2

[0053] like Figure 8 and 9 As shown, the difference between this embodiment and embodiment one is that the connecting block 2 is sleeved on the presser foot bracket 1. At this time, the spring 7 is located at the bottom of the connecting block 2 (not shown in the figure), and the outer end of the bottom of the connecting block 2 plays a limiting role to prevent the presser foot bracket 1 and the connecting block 2 from being squeezed excessively by the spring 7.

[0054] Compared to Embodiment 1, the presser foot bracket 1 and connecting block 2 in this embodiment are smaller in size and do not have deep groove structures that are difficult to clean.

[0055] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A self-locating presser foot for facilitating maintenance, characterized by: It includes a presser foot bracket (1), a connecting block (2), a presser foot plate (3), and a limiting baffle (4), wherein: The connecting block (2) is rotatably connected to the top of the presser foot bracket (1) via a rotating shaft (5), and a spring (7) is provided between the presser foot bracket (1) and the connecting block (2). The bottom of the presser foot bracket (1) is provided with a mounting groove (16), and the top of the presser foot plate (3) is fitted into the mounting groove (16); The limiting baffle (4) includes a pressure plate (42) and a positioning block (43). A T-pin (41) is provided on the side of the pressure plate (42) away from the positioning block (43). A rotating limiting hole (14) is opened on the pressure foot bracket (1). The T-pin (41) passes through the rotating limiting hole (14) to make the limiting baffle (4) and the pressure foot bracket (1) rotatably connected. The presser foot bracket (1) has a spindle (12) on the side near the limiting baffle (4), and a torsion spring (6) is sleeved on the spindle (12). The two ends of the torsion spring (6) are fixed on the presser foot bracket (1) and the limiting baffle (4) respectively.

2. The maintenance-friendly positioning presser foot according to claim 1, characterized in that The top of the presser foot bracket (1) is provided with a receiving groove (11), the connecting block (2) is placed in the receiving groove (11), and the rotating shaft (5) passes through the side wall of the receiving groove (11) and the connecting block (2).

3. The self-threading presser foot of claim 2, wherein: The connecting block (2) has a limiting block (21) on one side, and the presser foot bracket (1) has a stop block (15) on one side of the top. When the connecting block (2) rotates outward, the stop block (15) will contact the limiting block (21).

4. The maintenance-friendly positioning presser foot according to claim 1, characterized in that: Both the presser foot bracket (1) and the connecting block (2) have pin holes (13) for inserting pins (8).

5. The maintenance-friendly positioning presser foot according to claim 1, characterized in that: The presser foot plate (3) is secured in the mounting groove (16) by the mounting block (31) at the top. The mounting block (31) extends backward at the top to form a boss (32) and has protrusions (33) on both sides of the middle. The shape of the mounting groove (16) is the same as that of the mounting block (31).

6. The maintenance-friendly positioning presser foot according to claim 1, characterized in that: The presser foot bracket (1) and the limiting baffle (4) are both provided with grooves or limiting holes for accommodating the torsion spring (6).

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