Sewing machine thread guard

Abstract

The utility model provides a sewing machine edge guide with simple structure, two different sewing margin quick switching and high sewing processing efficiency, which comprises a fixed base, a first edge guide plate and a second edge guide plate, the first edge guide plate is connected to the fixed base through a first rotating shaft, the first edge guide plate comprises a first supporting leg, a first adjusting device and a first connecting plate, the first supporting leg is connected to the first connecting plate through the first adjusting device and is adjusted in front, back, left and right positions through the first adjusting device, the first connecting plate is fixed on the first rotating shaft and is turned up and down with the first rotating shaft, the second edge guide plate is connected to the fixed base through a second rotating shaft, the second edge guide plate comprises a second supporting leg, a second adjusting device and a second connecting plate, the second supporting leg is connected to the second connecting plate through the second adjusting device and is adjusted in front, back, left and right positions through the second adjusting device, and the second connecting plate is fixed on the second rotating shaft and is turned up and down with the second rotating shaft.

Description

Technical Field

[0001] This invention relates to a sewing machine edge guide. Background Technology

[0002] As an accessory for sewing machines, the sewing machine edge guide is used to position the needle thread relative to the outer edge of the workpiece during sewing. However, some sewing machines require two different sewing edge distances when sewing the same object. For example, when sewing the perimeter of a rectangle, the required sewing edge distances for the two long sides are different from those for the two wide sides. Although traditional adjustable sewing machine edge guides can also adjust for two different sewing edge distances, the adjustment speed is still too slow, affecting work efficiency. Summary of the Invention

[0003] This invention provides a sewing machine edge guide, which has the advantages of simple structure, quick switching between two different sewing edge distances, and high sewing processing efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a sewing machine edge rest, comprising a fixed base, a first edge rest plate, and a second edge rest plate. The first edge rest plate is connected to the fixed base via a first rotating shaft. The first edge rest plate includes a first foot, a first adjusting device, and a first connecting plate. The first foot is connected to the first connecting plate via the first adjusting device and can be adjusted up, down, left, and right positions via the first adjusting device. The first connecting plate is fixed on the first rotating shaft and rotates up and down with the first rotating shaft. The second edge rest plate is connected to the fixed base via a second rotating shaft. The second edge rest plate includes a second foot, a second adjusting device, and a second connecting plate. The second foot is connected to the second connecting plate via the second adjusting device and can be adjusted forward, backward, left, and right positions via the second adjusting device. The second connecting plate is fixed on the second rotating shaft and rotates up and down with the second rotating shaft.

[0005] The beneficial effects provided by this invention are as follows: the first and second side plates are fixedly installed on the sewing machine by a fixed base, and the first and second side plates are adjusted to the required two sewing edge distances by the first and second adjustment devices, respectively. In use, it is only necessary to flip the required first or second side plate downward to the working position by the first or second connecting plate around the first or second pivot. The other side plate that is not used can simply be flipped upward to the idle position. When changing the sewing edge distance, it is only necessary to flip the side plate that was originally in the working position upward to the idle position, and then flip the side plate that was originally in the idle position downward to the working position. The entire replacement process only requires flipping up and down, without the need to adjust the specific value of the sewing edge distance, which is very convenient and quick, and greatly improves the efficiency of sewing processing.

[0006] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the first side plate of the sewing machine side plate provided by the present invention in the working state.

[0008] Figure 2 yes Figure 1 Another perspective diagram.

[0009] Figure 3 This is a schematic diagram of the second side plate of the sewing machine side plate provided by the present invention in its working state.

[0010] Figure 4 yes Figure 3 Another perspective diagram.

[0011] Figure 5 This is a schematic diagram of the sewing machine edge plate provided by the present invention, in which both edge plates are in an idle state.

[0012] Figure 6 yes Figure 5 Another perspective diagram.

[0013] Figure 7 yes Figure 5 A schematic diagram of a sewing machine without the edge guide installed on the sewing machine.

[0014] Figure 8 This is a schematic diagram of the structure of a second embodiment of the sewing machine edge guide provided by the present invention.

[0015] Figure 9 yes Figure 8 Another perspective diagram.

[0016] Figure 10 This is a schematic diagram of the third embodiment of the sewing machine edge guide provided by the present invention.

[0017] Figure 11 yes Figure 10 Another perspective diagram.

[0018] Figure 12 This is a schematic diagram of the fourth embodiment of the sewing machine edge guide provided by the present invention.

[0019] Figure 13 yes Figure 12 Another perspective diagram.

[0020] Figure 14 yes Figure 12 A schematic diagram of a sewing machine without the edge guide installed on the sewing machine.

[0021] Figure 15 yes Figure 14 A diagram showing how to adjust the up, down, left, and right positions of the footrest.

[0022] Figure 16 This is a structural schematic diagram of the fifth embodiment of the sewing machine edge guide provided by the present invention.

[0023] Figure 17 yes Figure 16 Another perspective diagram.

[0024] Figure 18 This is a schematic diagram of the sixth embodiment of the sewing machine edge guide provided by the present invention.

[0025] Figure 19 yes Figure 18 Another perspective diagram. Detailed Implementation

[0026] like Figure 1-19 As shown, the sewing machine edge rest provided by the present invention includes a fixed base 1, a first edge rest plate 2, and a second edge rest plate 3. The first edge rest plate 2 is connected to the fixed base 1 via a first rotating shaft 21. The first edge rest plate 2 includes a first foot 22, a first adjusting device 23, and a first connecting plate 24. The first foot 22 is connected to the first connecting plate 24 via the first adjusting device 23, and the first adjusting device 23 enables front-back, back-left, and right position adjustment. The first connecting plate 24 is fixed to the first rotating shaft 21 and rotates up and down with the first rotating shaft 21. The second edge rest plate 3 is connected to the fixed base 1 via a second rotating shaft 31. The second edge rest plate 3 includes a second foot 32, a second adjusting device 33, and a second connecting plate 34. The second foot 32 is connected to the second connecting plate 34 via the second adjusting device 33, and the second adjusting device 33 enables front-back, back-left, and right position adjustment. The second connecting plate 34 is fixed to the second rotating shaft 31 and rotates up and down with the second rotating shaft 31.

[0027] like Figure 1-15 As shown, the first rotating shaft 21 is connected to the fixed base 1, and the second rotating shaft 31 is connected to the first rotating shaft 21 through the connecting block 13. This structure is more convenient to install, as only one fixed base 1 needs to be installed in the corresponding position on the sewing machine.

[0028] like Figure 16-19 As shown, the fixed base 1 includes a first base 11 and a second base 12. The first side plate 2 is connected to the first base 11 via a first pivot 21, and the second side plate 3 is connected to the second base 12 via a second pivot 31. The first side plate 2 and the second side plate 3 are respectively installed on the two fixed bases 1. This structure is more flexible and can be applied to more models of sewing machines.

[0029] like Figure 1-19 As shown, the first rotating shaft 21 and the second rotating shaft 31 are on two parallel axes. When the first side plate 2 or the second side plate 3 is replaced, and the first side plate 2 and the second side plate 3 are flipped up and down, no collision or jamming is found between the first side plate 2 and the second side plate 3. That is, the first side plate 2 rotates around a small circle, while the second side plate 3 rotates around a large circle. The motion trajectories of the two during the rotation process have no intersection point. That is, the motion trajectory of the first side plate 2 and the second side plate 3 is the motion trajectory of rotating around the axis with the working position of the first foot 22 and the second foot 32 as the closest circumference point, and the first rotating shaft 21 and the second rotating shaft 31, which are in an eccentric position, as the center.

[0030] like Figure 1-19 As shown, a first elastic positioning device 25 is provided between the first side plate 2 and the first rotating shaft 21. The first elastic positioning device 25 provides elastic force to keep the first side plate 2 in the working position and in the idle position. A second elastic positioning device 35 is provided between the second side plate 3 and the second rotating shaft 31. The second elastic positioning device 35 provides elastic force to keep the second side plate 3 in the working position and in the idle position. This structure can keep the first side plate 2 and the second side plate 3 in the working position or the idle position, and prevent them from shifting due to machine vibration during the sewing process.

[0031] like Figure 1-19 As shown, the first elastic positioning device 25 and the second elastic positioning device 35 are both springs 4. Through the tension of the springs 4, the tension of the first side plate 2 and the second side plate 3 is first overcome during the up-and-down flipping process. After the rotation exceeds the position of maximum tension, the tension provided by the springs 4 can keep the first side plate 2 and the second side plate 3 in the working position or the idle position.

[0032] like Figure 1-11 as well as Figure 16-19 As shown, both the first adjusting device 23 and the second adjusting device 33 are provided with a horizontal adjusting slot 5 and a vertical adjusting slot 6. The horizontal adjusting slot 5 is engaged with the first foot 22 and the second foot 32 respectively by fastening screws to control the left and right position adjustment of the first foot 22 and the second foot 32. The vertical adjusting slot 6 is engaged with the first connecting plate 24 and the second connecting plate 34 respectively by fastening screws to control the up and down position adjustment of the first foot 22 and the second foot 32. By adjusting the up, down and left and right positions of the first foot 22 and the second foot 32 by the horizontal adjusting slot 5 and the vertical adjusting slot 6, it is possible to set the two required sewing edge distances before sewing machine processing. This structure is more suitable for larger sewing machine edge guides and has a wider range of applications.

[0033] like Figure 12-15 As shown, both the first adjusting device 23 and the second adjusting device 33 have hollow tubular adjusting tubes 7, and the rear ends of the first foot 22 and the second foot 32 are both cylindrical adjusting rods 8. The cylindrical adjusting rods 8 are inserted into the hollow tubular adjusting tubes 7 and are engaged with the fastening screws to control the left and right positions of the first foot 22 and the second foot 32. Furthermore, by rotating the cylindrical adjusting rods 8, the up and down positions of the first foot 22 and the second foot 32 are controlled. By cooperating with the cylindrical adjusting rods 8 and the hollow tubular adjusting tubes 7 to adjust the up, down, left, and right positions of the first foot 22 and the second foot 32, it is possible to set the two required sewing edge distances before sewing machine processing. This structure is more suitable for smaller sewing machine edge supports and has lower production costs.

[0034] like Figure 1-19 As shown, the first foot 22 and the second foot 32 are located on the same side of the sewing machine needle. Setting the first foot 22 and the second foot 32 on the same side of the sewing machine needle makes it easier to handle the workpiece during sewing, avoids mutual interference with the round presser foot and foot of the sewing machine, and ensures that the first foot 22 or the second foot 32 is roughly on the same horizontal line as the sewing machine needle when it is in the working position, resulting in a better finished sewing product.

[0035] like Figure 1-6 As shown in Figures 8-11 and 16-19, the fixed base 1 can be fixed to the crossbeam of the sewing machine frame, as follows: Figure 12-15 As shown, the fixed base 1 can also be fixed on the presser foot fixed base. Different schemes can be designed according to actual needs, all of which fall within the scope of protection claimed in this application.

Claims

1. A sewing machine edge guide, characterized in that: The system includes a fixed base (1), a first side plate (2), and a second side plate (3). The first side plate (2) is connected to the fixed base (1) via a first rotating shaft (21). The first side plate (2) includes a first foot (22), a first adjusting device (23), and a first connecting plate (24). The first foot (22) is connected to the first connecting plate (24) via the first adjusting device (23), and its up, down, left, and right positions are adjusted via the first adjusting device (23). The first connecting plate (24) is fixed to the first rotating shaft (21) and rotates up and down with the first rotating shaft (21). The second side plate (3) is connected to the fixed base (1) via the second pivot (31). The second side plate (3) includes a second foot (32), a second adjustment device (33), and a second connecting plate (34). The second foot (32) is connected to the second connecting plate (34) via the second adjustment device (33) and can be adjusted to the front, back, left, and right positions via the second adjustment device (33). The second connecting plate (34) is fixed on the second pivot (31) and rotates up and down with the second pivot (31). The first pivot (21) and the second pivot (31) are on two parallel axes.

2. The sewing machine edge guide according to claim 1, characterized in that: The first rotating shaft (21) is connected to the fixed base (1), and the second rotating shaft (31) is connected to the first rotating shaft (21) through the connecting block (13).

3. The sewing machine edge guide according to claim 1, characterized in that: The fixed base (1) includes a first base (11) and a second base (12). The first side plate (2) is connected to the first base (11) via a first pivot (21), and the second side plate (3) is connected to the second base (12) via a second pivot (31).

4. The sewing machine edge guide according to claim 1, 2, or 3, characterized in that: A first elastic positioning device (25) is provided between the first side plate (2) and the first rotating shaft (21). The first elastic positioning device (25) provides elastic force to keep the first side plate (2) in the working position and in the idle position. A second elastic positioning device (35) is provided between the second side plate (3) and the second rotating shaft (31). The second elastic positioning device (35) provides elastic force to keep the second side plate (3) in the working position and in the idle position.

5. The sewing machine edge guide according to claim 4, characterized in that: Both the first elastic positioning device (25) and the second elastic positioning device (35) are springs (4).

6. The sewing machine edge guide according to claim 1, characterized in that: The first adjustment device (23) and the second adjustment device (33) are each provided with a horizontal adjustment slot (5) and a vertical adjustment slot (6). The horizontal adjustment slot (5) is connected to the first foot (22) and the second foot (32) respectively by fastening screws to control the left and right position adjustment of the first foot (22) and the second foot (32). The vertical adjustment slot (6) is connected to the first connecting plate (24) and the second connecting plate (34) respectively by fastening screws to control the up and down position adjustment of the first foot (22) and the second foot (32).

7. The sewing machine edge guide according to claim 1, characterized in that: Both the first adjustment device (23) and the second adjustment device (33) have hollow tubular adjustment tubes (7). The rear ends of the first foot (22) and the second foot (32) are cylindrical adjustment rods (8). The cylindrical adjustment rods (8) are inserted into the hollow tubular adjustment tubes (7) and are engaged with the fastening screws to control the left and right positions of the first foot (22) and the second foot (32). The first foot (22) and the second foot (32) are adjusted up and down by rotating the cylindrical adjustment rods (8).

8. The sewing machine edge guide according to claim 1, characterized in that: The first foot (22) and the second foot (32) are located on the same side of the sewing machine needle.

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