Active low-resistance mop presser foot

Abstract

The utility model provides an active low-resistance mop presser foot which comprises a presser foot connecting frame, a first mop wheel and a presser foot plate are rotatably connected to the lower portion of the presser foot connecting frame, a first mop motor is fixed to the rear side of the presser foot connecting frame, a push-pull mechanism is fixed to the right side of the presser foot connecting frame, and the first mop motor is connected with the first mop wheel and drives the first mop wheel to rotate; a push-pull rod is arranged at the bottom of the push-pull mechanism, the push-pull mechanism controls the push-pull rod to move up and down, the push-pull rod is hinged to the right end of the presser foot plate, and the left end of the presser foot plate tilts upwards; the mop further comprises a controller, and the controller is electrically connected with the first mop motor and the push-pull mechanism. The cloth dragging wheel is driven by the motor to rotate, so that the upper-layer fabric and the lower-layer fabric move synchronously, displacement between the upper-layer fabric and the lower-layer fabric is avoided, and the sewing effect is effectively improved; meanwhile, the presser foot plate is controlled through the push-pull mechanism, so that the presser foot plate is lifted when the cloth moves, friction is avoided, and the sewing effect is further improved.

Description

Technical Field

[0001] This utility model relates to a sewing machine presser foot, and more particularly to an active low-resistance fabric drag presser foot. Background Technology

[0002] Traditional sewing machines typically use a single feed dog to move the fabric. The presser foot presses the fabric down, while the lower feed dog lifts up, working together to move the fabric away from the needle plate and forward or backward. Sewing machines usually require sewing two layers of fabric together with needle and thread. During fabric feeding, the lower feed dog is the active force, moving the fabric forward or backward, while the presser foot passively holds the fabric in place, creating friction between the fabric and the feed dog. However, when the presser foot presses the fabric, friction is also generated between the presser foot and the fabric, and these two frictional forces are in opposite directions. Therefore, during sewing, the two layers of fabric may shift. This is especially true for slippery fabrics such as polyester and silk, where the friction between the two layers is lower, making shifting more likely. This results in uneven, bulging, and twisting of the sewn fabric, causing wrinkles and unevenness.

[0003] To solve the problem of friction between the presser foot and the fabric, a presser foot with rollers has been developed, such as... Figure 1 The device features a free roller at the rear of the presser foot assembly, which reduces friction. However, the front of the presser foot still rubs against the fabric, causing displacement. Furthermore, the roller creates an angle between the presser foot and the fabric, reducing their contact area and hindering the feed dog from effectively moving the upper fabric. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this utility model is to provide an active, low-resistance mop presser foot that effectively prevents displacement between upper and lower layers. To achieve the above objective, this utility model adopts the following technical solution:

[0006] (II) Technical Solution

[0007] An active low-resistance mop presser foot includes a presser foot connecting frame, a first mop wheel and a presser foot plate rotatably connected below the presser foot connecting frame, a first mop motor fixed to the rear side, and a push-pull mechanism fixed to the right side. The first mop motor is connected to the first mop wheel and drives it to rotate. A push-pull rod is provided at the bottom of the push-pull mechanism, and the push-pull mechanism controls the push-pull rod to move up and down. The push-pull rod is hinged to the right end of the presser foot plate, and the left end of the presser foot plate is tilted upward. The presser foot also includes a controller, which is electrically connected to the first mop motor and the push-pull mechanism.

[0008] Furthermore, a second mop roller is provided below the presser foot connecting frame. The second mop roller is located on the left side of the presser foot plate, and a second mop motor electrically connected to the controller is fixed on the rear side of the presser foot connecting frame. The second mop motor is connected to the second mop roller and drives it to rotate.

[0009] Furthermore, both the first tractor motor and the second tractor motor are eccentric motors.

[0010] Furthermore, the push-pull mechanism is a push-pull electromagnet.

[0011] Furthermore, the bottom of the push-pull rod is provided with a waist-shaped hole that is horizontal in the length direction, and the right end of the pressure foot plate is provided with a pin that passes through the waist-shaped hole.

[0012] Furthermore, the top of the presser foot connecting bracket is provided with a mounting bracket, and the push-pull mechanism is fixed to the right side of the mounting bracket.

[0013] (III) Beneficial Effects

[0014] This utility model has significant advantages and beneficial effects compared with the prior art, specifically:

[0015] 1. The motor drives the mop roller to rotate, so that the upper and lower fabrics move synchronously, avoiding displacement between them and effectively improving the sewing effect.

[0016] 2. The presser foot is controlled by a push-pull mechanism, which lifts it when the fabric moves to avoid friction and further improve the sewing effect;

[0017] 3. By setting a second mopping roller on the left side of the presser foot, the mopping effect can be improved, and the two ends of the seam can be pressed down during sewing, resulting in a better sewing effect. Attached Figure Description

[0018] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0019] Figure 1 There is an existing presser foot with rollers;

[0020] Figure 2 This is a top-view perspective view of Embodiment 1;

[0021] Figure 3 This is a bottom-view perspective view of Embodiment 1;

[0022] Figure 4 This is a cross-sectional view of Embodiment 1;

[0023] Figure 5 This is a top-view perspective view of Embodiment 2;

[0024] Figure 6This is a bottom-view perspective view of Example 2.

[0025] Explanation of icon numbers:

[0026] 1. Presser foot connecting bracket; 11. Mounting bracket; 2. First drag wheel.

[0027] 3. Presser foot plate; 4. First mop motor; 5. Push-pull mechanism

[0028] 6. Push-pull rod 61. Waist-shaped hole 7. Second mop wheel

[0029] 8. Second tractor motor Detailed Implementation

[0030] 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.

[0031] 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", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0032] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] 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.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] Please see Figures 2 to 4 As shown, an active low-resistance mop presser foot includes a presser foot connecting frame 1, a first mop wheel 2 and a presser foot plate 3 rotatably connected below the presser foot connecting frame 1, a first mop motor 4 fixed to the rear side, and a push-pull mechanism 5 fixed to the right side, wherein:

[0037] The first mop motor 4 is connected to the first mop wheel 2 and drives it to rotate, thereby driving the fabric forward from above and avoiding relative displacement between the upper and lower layers of fabric.

[0038] The push-pull mechanism 5 has a push-pull rod 6 at its bottom. The up-and-down movement of the push-pull rod 6 is controlled by the push-pull mechanism 5. The push-pull rod 6 is hinged to the right end of the presser foot plate 3, and the left end of the presser foot plate 3 is tilted upward. With this design, when the fabric stops moving, the push-pull mechanism 5 pushes the push-pull rod 6 downward. At this time, the left end of the presser foot plate 3 is lifted upward and does not contact the fabric, thereby reducing friction, eliminating fabric displacement, and solving the problem of wrinkling during fabric sewing.

[0039] It should be noted that this utility model also includes a controller, which is electrically connected to the first mop motor 4 and the push-pull mechanism 5 to coordinate their start and stop times. Specifically, the movement of the fabric is usually intermittent. Therefore, under the control of the controller, the first mop motor 4 can be started and the push-pull rod 6 can be pushed out when the fabric is moving, so that the left end of the presser foot 3 is raised. When sewing, the first mop motor 4 can be turned off and the push-pull rod 6 can be pulled back, so that the left end of the presser foot 3 presses down on the fabric to ensure the sewing effect.

[0040] Understandably, to prevent the motor from touching the cloth or tabletop, the first mop motor 4 is an eccentric motor. On the one hand, it can be installed at an upward angle during installation, and on the other hand, it has a built-in reduction gear to effectively increase the motor's output torque and ensure the mopping effect.

[0041] It is worth mentioning that the push-pull mechanism 5 is a push-pull electromagnet, which is small in size and responds quickly.

[0042] It should be added that, since the push-pull rod 6 moves vertically, while the right end of the pressure foot plate 3 moves in an arc, a certain gap needs to be left between the two. Figure 4 The push-pull rod 6 has a horizontally oriented oblong hole 61 at its bottom, and a pin is provided at the right end of the pressure foot plate 3, which passes through the oblong hole 61. Thus, when the push-pull rod 6 moves up and down, the pin will move left and right within the oblong hole 61 without causing motion interference.

[0043] For ease of installation, the top of the presser foot connecting bracket 1 is provided with a mounting bracket 11 for connecting to a sewing machine, and the push-pull mechanism 5 is fixed to the right side of the mounting bracket 11.

[0044] Example 2

[0045] The difference between this embodiment and Embodiment 1 is that: Figure 5 and Figure 6 Below the presser foot connecting frame 1, a second mopping wheel 7 is also provided. The second mopping wheel 7 is located on the left side of the presser foot plate 3, and a second mopping motor 8 electrically connected to the controller is fixed to the rear side of the presser foot connecting frame 1. The second mopping motor 8 is connected to the second mopping wheel 7 and drives it to rotate. By setting the second mopping wheel 7 on the left side of the presser foot plate 3, the mopping effect can be improved, and the two ends of the seam can be pressed down during sewing, resulting in a better sewing effect.

[0046] It should be noted that the second mop roller 7 should start and stop synchronously with the first mop roller 2 and rotate at the same speed. Similarly, the second mop motor 8 is also an eccentric motor.

[0047] like Figure 5 The top of the presser foot connector 1 needs to have an opening for the sewing needle to pass through.

[0048] 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. An active low-resistance mop presser foot, comprising a presser foot connecting frame (1), characterized in that: The first mop wheel (2) and the presser foot plate (3) are rotatably connected below the presser foot connecting frame (1), the first mop motor (4) is fixed at the rear, and the push-pull mechanism (5) is fixed at the right side. The first mop motor (4) is connected to the first mop wheel (2) and drives it to rotate. The push-pull mechanism (5) has a push-pull rod (6) at the bottom, and the push-pull mechanism (5) controls the push-pull rod (6) to move up and down. The push-pull rod (6) is hinged to the right end of the presser foot plate (3), and the left end of the presser foot plate (3) is tilted upward. The mechanism also includes a controller, which is electrically connected to the first mop motor (4) and the push-pull mechanism (5).

2. The active low-resistance mop presser foot according to claim 1, characterized in that: Below the presser foot connecting frame (1), there is a second mop wheel (7). The second mop wheel (7) is located on the left side of the presser foot plate (3), and a second mop motor (8) electrically connected to the controller is fixed on the rear side of the presser foot connecting frame (1). The second mop motor (8) is connected to the second mop wheel (7) and drives it to rotate.

3. The active low-resistance mop presser foot according to claim 2, characterized in that: Both the first mop motor (4) and the second mop motor (8) are eccentric motors.

4. The active low-resistance mop presser foot according to claim 1, characterized in that: The push-pull mechanism (5) is a push-pull electromagnet.

5. The active low-resistance mop presser foot according to claim 1, characterized in that: The bottom of the push-pull rod (6) is provided with a waist-shaped hole (61) with the length direction horizontal, and the right end of the pressure foot plate (3) is provided with a pin, which passes through the waist-shaped hole (61).

6. The active low-resistance mop presser foot according to claim 1, characterized in that: The top of the presser foot connecting bracket (1) is provided with a mounting bracket (11), and the push-pull mechanism (5) is fixed to the right side of the mounting bracket (11).

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