Lightweight presser foot and upper tooth lifting adjusting lever structure

Abstract

The utility model relates to a light-force presser foot and upper tooth lifting adjusting lever structure which comprises an adjusting assembly, a presser foot lifting frame and an upper tooth lifting frame, the adjusting assembly comprises a fixing base, a connecting rod, a transmission rod, a lifting frame and a pulling rod, the fixing base is fixed to a sewing machine, a mounting base is fixed to the top of the left side of the fixing base, and a connecting shaft is rotationally connected to the mounting base; the top end of the connecting rod is rotatably connected with the mounting base through a connecting shaft, the other end of the connecting rod is hinged to the end of the transmission rod, the bottom end of the connecting rod is arranged downwards in a rightward inclined mode, and the middle of the lifting frame is rotatably connected to the sewing machine. The end, away from the connecting rod, of the transmission rod inclines rightwards and extends upwards. The bottom end of a pulling rod is fixed to the middle of the lifting frame. The mounting base is arranged on the left side of the fixing base, the length of the connecting rod is increased, the lever effect of the connecting rod is enhanced, pulling of the pulling rod is more labor-saving, and use of the sewing machine is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewing machine accessories, in particular to a light pressure foot, an upper tooth lifting adjusting lever structure. BACKGROUND

[0002] The sewing machine pressure foot is used to flatten the cloth on the sewing machine table. The pressure foot in the related art is adjusted up and down by the following mechanism. Referring to Figure 1 , it comprises an adjusting assembly 1, a pressure foot lifting frame 2 and an upper tooth lifting frame 3. The adjusting assembly 1 comprises a fixed seat 11, a connecting rod 12, a transmission rod 13, a lifting frame 14 and a pulling rod 15. The fixed seat 11 is fixed on the sewing machine. The top end of the connecting rod 12 is rotationally connected to the fixed seat 11 through a connecting shaft 5. The other end of the connecting rod 12 is hingedly connected to the end of the transmission rod 13. The middle part of the lifting frame 14 is rotationally connected to the sewing machine. The left side of the lifting frame 14 is hingedly connected to the end of the transmission rod 13 away from the connecting rod 12. The other end of the lifting frame 14 is used to lift the pressure foot lifting frame 2. The middle part of the lifting frame 14 is fixed to the bottom end of the pulling rod 15.

[0003] One end of the pressure foot lifting frame 2 is hingedly connected to the sewing machine through a long shaft 6, and is located below the connecting rod 12 at the hinge of the sewing machine. The other end of the pressure foot lifting frame 2 is provided with a pressing column 7 at the top. The pressing column 7 is slidingly arranged on the sewing machine. The bottom end of the pressing column 7 is press-connected to the pressure foot lifting frame 2. The pressing column 7 is fixed with a lifting plate 71. The right end of the lifting frame 14 is located below the lifting plate 71. When the pulling rod 15 is pulled to the left, the right end of the lifting frame 14 is lifted to lift the lifting plate 71. The end of the pressure foot lifting frame 2 provided with the pressing column 7 is used to connect the pressure foot (not shown in the figure). A torsional spring 8 is arranged on the long shaft 6. The torsional spring 8 keeps the pressure foot lifting frame 2 in a tendency to be lifted. The pressing column 7 is connected to a spring structure (not shown in the figure) to press down the pressing column 7, thereby pressing down the pressure foot. After the lifting frame 14 lifts the lifting plate 71, the torsional spring 8 lifts the right end of the pressure foot lifting frame 2, thereby lifting the pressure foot.

[0004] The upper tooth lifting frame 3 is rotationally connected to the long shaft 6. The upper tooth lifting frame 3 comprises a main body 31, an upper tooth lifting rod 32 on the right side of the main body 31 and a lifting rod 33 on the left side of the main body 31. A connecting shaft 5 is rotationally connected to the fixed seat 11. A pressing block 9 is fixed on the connecting shaft 5. When the connecting shaft 5 rotates, the pressing block 9 presses down the lifting rod 33, thereby driving the upper tooth lifting rod 32 to be lifted, thereby lifting the upper tooth (not shown in the figure).

[0005] When the pulling rod 15 is pulled to the left, the transmission rod 13 drives the connecting shaft 5 to rotate, thereby pressing down the pressing block 9 to press down the lifting rod 33, so that when the pulling rod 15 is pulled, the upper tooth and the pressure foot are lifted together.

[0006] In view of the above related art, the inventor believes that the pulling rod needs a large force to be pulled, which affects the lifting of the pressure foot and the upper tooth, and affects the use of the sewing machine. CONTENT OF THE UTILITY MODEL

[0007] In order to facilitate the pulling of the lever, the application provides a light pressure foot, and a tooth lifting adjusting lever structure.

[0008] The application provides a light pressure foot, and a tooth lifting adjusting lever structure, which adopts the following technical scheme:

[0009] A light pressure foot, and a tooth lifting adjusting lever structure, which comprises a adjusting assembly, a pressure foot lifting frame and a tooth lifting frame, the adjusting assembly comprises a fixed seat, a connecting rod, a transmission rod, a lifting frame and a pulling lever, the fixed seat is fixed on a sewing machine, a mounting seat is fixed on the top of the left side of the fixed seat, a connecting shaft is rotatably connected to the mounting seat, the top end of the connecting rod is rotatably connected to the mounting seat through the connecting shaft, the other end of the connecting rod is hingedly connected to the end of the transmission rod, the bottom end of the connecting rod is obliquely downwardly arranged to the right, the middle part of the lifting frame is rotatably connected to the sewing machine, the left side of the lifting frame is hingedly connected to the end of the transmission rod away from the connecting rod, the other end of the lifting frame is used for lifting the pressure foot lifting frame, the end of the transmission rod away from the connecting rod extends obliquely upward to the right, and the bottom end of the pulling lever is fixed to the middle part of the lifting frame.

[0010] By adopting the above technical scheme, the mounting seat is arranged on the left side of the fixed seat, the length of the connecting rod is extended, the pulling of the pulling lever is more labor-saving due to the enhanced lever effect of the connecting rod, the lifting of the pressure foot and the tooth is facilitated, and the use of the sewing machine is facilitated.

[0011] Optionally, the left end of the pressure foot lifting frame is hingedly connected to the sewing machine through a long shaft, and is located below the connecting rod at the hinged position of the sewing machine, a pressing column is arranged on the top of the other end of the pressure foot lifting frame, the pressing column is slidably arranged on the sewing machine, a lifting plate is fixed on the pressing column, the right end of the lifting frame is located below the lifting plate, when the pulling lever is pulled to the left, the right end of the lifting frame is lifted to lift the lifting plate, and the end of the pressure foot lifting frame, on which the pressing column is arranged, is used for connecting the pressure foot.

[0012] A torsional spring is arranged on the long shaft, the torsional spring makes the pressure foot lifting frame have a tendency to be upwardly tilted, and the pressing column is pressed downward by the spring structure.

[0013] By adopting the above technical scheme, the pressing column is pressed downward by the spring structure, the end of the pressure foot lifting frame, on which the pressing column is arranged, is pressed downward, and the pressure foot is pressed downward. When the pulling lever is pulled to the left, the right end of the lifting frame is tilted upward to lift the lifting plate, the pressing column is lifted, the end of the pressure foot lifting frame is lifted by the torsional spring, and the lifting of the pressure foot is realized. Since the force required for pulling the pulling lever is reduced, the lifting of the pressing column is facilitated, and the lifting of the pressure foot is facilitated.

[0014] Optionally, the upper tooth lifting frame is rotationally connected to the long shaft, the upper tooth lifting frame comprises a main body part, an upper tooth lifting rod on the right side of the main body part, and a lifting rod on the left side of the main body part, a pressing block is fixed on the connecting shaft, and when the connecting shaft rotates, the pressing block presses down the lifting rod to drive the upper tooth lifting rod to lift up.

[0015] By adopting the above technical scheme, when the pulling lever is pulled to the left, the pressing block presses down the lifting rod to make the upper tooth lifting rod lift up to lift up the upper tooth, and at the same time, the pressing foot lifting frame also lifts up the lifting plate, the torsional spring drives the pressing foot lifting frame to lift up, and the effect of lifting up the pressing foot and the upper tooth at the same time is realized.

[0016] Optionally, the length of the connecting rod is 6-8 cm, and the length of the lifting rod is 5-7 cm.

[0017] By adopting the above technical scheme, in the prior art, the length of the connecting rod is about 3-5 cm, and the length of the lifting rod is 2-4 cm, the lever effect is small, and it is difficult to pull the pulling lever. In the scheme of the present application, the length of the connecting rod is extended to 6-8 cm, and the length of the lifting rod is extended to 5-7 cm, the lever effect is improved, and it is more labor-saving to pull the pulling lever.

[0018] In summary, the present application has at least one of the following beneficial technical effects:

[0019] 1. The left side of the fixed seat is provided with a mounting seat, so that the length of the connecting rod is extended, and when the pulling lever is pulled, the lever effect of the connecting rod is enhanced, so that the pulling of the pulling lever is more labor-saving, thereby facilitating the lifting of the pressing foot and the upper tooth, and facilitating the use of the sewing machine.

[0020] 2. The length of the connecting rod is extended to 6-8 cm, the length of the lifting rod is extended to 5-7 cm, the lever effect is improved, and it is more labor-saving to pull the pulling lever. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a display of the pressing foot adjusting mechanism in the related art Figure 1 , mainly showing the front structure.

[0022] Figure 2 is a display of the pressing foot adjusting mechanism in the related art Figure 2 , mainly showing the back structure.

[0023] Figure 3 is a display of the light-force pressing foot and upper tooth lifting adjusting lever structure of the embodiment Figure 1 , mainly showing the front structure.

[0024] Figure 4 is a display of the light-force pressing foot and upper tooth lifting adjusting lever structure of the embodiment Figure 2 , mainly showing the back structure.

[0025] Figure 5is a schematic view of the overall upper tooth lifting frame of the embodiment.

[0026] Reference signs: 1, adjusting assembly; 11, fixed seat; 12, connecting rod; 13, transmission rod; 14, lifting frame; 15, pulling rod; 2, presser foot lifting frame; 3, upper tooth lifting frame; 31, main body; 32, upper tooth lifting rod; 33, tilting rod; 4, mounting seat; 41, mounting hole; 5, connecting shaft; 6, long shaft; 7, press column; 71, lifting plate; 8, torsional spring; 9, pressing block. DETAILED DESCRIPTION

[0027] The application will be further described in detail below with reference to the accompanying drawings.

[0028] The embodiment of the application discloses a light presser foot and upper tooth lifting adjusting lever structure. Referring to Figure 3 , the light presser foot and upper tooth lifting adjusting lever structure comprises an adjusting assembly 1, a presser foot lifting frame 2 and an upper tooth lifting frame 3. The adjusting assembly 1 comprises a fixed seat 11, a connecting rod 12, a transmission rod 13, a lifting frame 14 and a pulling rod 15. The fixed seat 11 is fixed on a sewing machine, a mounting seat 4 is welded and fixed on the top of the left side of the fixed seat 11, mounting holes 41 are formed in the mounting seat 4, a connecting shaft 5 is rotationally connected in the mounting holes 41, and the top end of the connecting rod 12 is rotationally connected to the mounting seat 4 through the connecting shaft 5.

[0029] Referring to Figure 3 , the length of the connecting rod 12 is 6-8 cm, the other end of the connecting rod 12 is hingedly connected to the end of the transmission rod 13, the bottom end of the connecting rod 12 is obliquely downwardly arranged to the right, the middle part of the lifting frame 14 is rotationally connected to the sewing machine, the left side of the lifting frame 14 is hingedly connected to the end of the transmission rod 13 away from the connecting rod 12, the other end of the lifting frame 14 is used for lifting the presser foot lifting frame 2, the end of the transmission rod 13 away from the connecting rod 12 extends obliquely upwardly to the right, the bottom end of the pulling rod 15 is fixed to the middle part of the lifting frame 14, and the top end of the pulling rod 15 extends vertically upwardly.

[0030] The left end of the presser foot lifting frame 2 is hingedly connected to the sewing machine through a long shaft 6, and is located below the connecting rod 12 at the hinge position of the sewing machine. The other end of the presser foot lifting frame 2 is provided with a press column 7, the press column 7 is slidingly arranged on the sewing machine, a lifting plate 71 is fixed to the press column 7, the right end of the lifting frame 14 is located below the lifting plate 71, and when the pulling rod 15 is pulled to the left, the right end of the lifting frame 14 is tilted upwardly to lift the lifting plate 71. The end of the presser foot lifting frame 2 provided with the press column 7 is used for connecting a presser foot (not shown in the figure).

[0031] Referring to Figure 4 , the long shaft 6 is provided with a torsional spring 8, the torsional spring 8 makes the end of the presser foot lifting frame 2 provided with the upper tooth keep a tendency of tilting upwardly, and the press column 7 is pressed downwardly on the presser foot through a spring structure (not shown in the figure).

[0032] Referring toFigure 4 、 Figure 5 The upper tooth lifting frame 3 is rotationally connected to the long shaft 6. The upper tooth lifting frame 3 comprises a main body 31, an upper tooth lifting rod 32 on the right side of the main body 31, and a lifting rod 33 on the left side of the main body 31. The length of the lifting rod 33 is 5-7 cm. The pressing block 9 is fixed on the connecting shaft 5. When the connecting shaft 5 rotates, the pressing block 9 presses down the lifting rod 33 to drive the upper tooth lifting rod 32 to lift up.

[0033] The implementation principle of the embodiment of the present application is that when the pulling lever 15 is pulled to the left, the pressing block 9 presses down the lifting rod 33, and the upper tooth lifting rod 32 is lifted up to lift up the upper tooth. At the same time, the pressing foot lifting frame 2 also lifts up the lifting plate 71. The torsional spring 8 drives the pressing foot lifting frame 2 to lift up, thereby achieving the effect of lifting up the pressing foot and the upper tooth at the same time.

[0034] In the present application, the left side of the fixed seat 11 is welded and fixed with the mounting seat 4, so that the length of the connecting rod 12 is extended to 6-8 cm. When the pulling lever 15 is pulled, the lever effect of the connecting rod 12 is enhanced, so that the pulling of the pulling lever 15 is more labor-saving, thereby facilitating the lifting of the pressing foot and the upper tooth, and facilitating the use of the sewing machine.

[0035] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A light force presser foot, upper thread lifting adjustment lever structure, comprising an adjustment assembly (1), a presser foot lifting frame (2) and an upper thread lifting frame (3), the adjustment assembly (1) comprising a fixed seat (11), a connecting rod (12), a transmission rod (13), a lifting frame (14) and a pulling rod (15), the fixed seat (11) being fixed to a sewing machine, characterized in that: The fixed seat (11) left top is fixed with a mounting seat (4), the mounting seat (4) is rotatably connected with a connecting shaft (5), the connecting rod (12) top end is rotatably connected with the mounting seat (4) through the connecting shaft (5), the connecting rod (12) other end is hingedly connected with the transmission rod (13) end, the connecting rod (12) bottom end is obliquely downward arranged to the right, the lifting frame (14) middle part is rotatably connected with the sewing machine, the lifting frame (14) left side is hingedly connected with the transmission rod (13) away from the connecting rod (12) end, the lifting frame (14) other end is used for lifting the presser foot lifting frame (2), the transmission rod (13) away from the connecting rod (12) end extends obliquely upward to the right, the lifting frame (14) middle part is fixed with the bottom end of the pulling lever (15).

2. The light pressure foot, upper tooth lifting adjusting lever structure according to claim 1, characterized in that: The presser foot lifting frame (2) left end is hingedly connected with the sewing machine through the long shaft (6), and is located below the connecting rod (12) at the hinge of the sewing machine, the presser foot lifting frame (2) other end top is provided with a pressing column (7), the pressing column (7) is slidably arranged on the sewing machine, the pressing column (7) is fixed with a lifting plate (71), the right end of the lifting frame (14) is located below the lifting plate (71), when the pulling lever (15) is pulled to the left, the right end of the lifting frame (14) is lifted to lift the lifting plate (71), the presser foot lifting frame (2) is provided with the end part of the pressing column (7) bottom for connecting the presser foot; The long shaft (6) is provided with a torsional spring (8), the torsional spring (8) makes the presser foot lifting frame (2) keep the tendency of lifting, the pressing column (7) is pressed down on the presser foot by setting the spring structure.

3. The light-duty presser foot, upper tooth lifting lever structure according to claim 2, characterized in that: The upper tooth lifting frame (3) is rotatably connected with the long shaft (6), the upper tooth lifting frame (3) includes a main body part (31), an upper tooth lifting lever (32) on the right side of the main body part (31) and a lifting lever (33) on the left side of the main body part (31), the connecting shaft (5) is fixed with a pressing block (9), when the connecting shaft (5) rotates, the pressing block (9) presses down the lifting lever (33) to drive the upper tooth lifting lever (32) to lift.

4. The light pressure foot, upper tooth lifting adjusting lever structure according to claim 3, characterized in that: The connecting rod (12) length is 6-8cm, the lifting lever (33) length is 5-7cm.

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