Sewing machine pedal based on grating ruler technology

Abstract

The invention discloses a sewing machine pedal based on the grating ruler technology, and relates to the technical field of sewing machines, the sewing machine pedal comprises a pedal pull rod and a speed regulator mounting support, the speed regulator mounting support is provided with a speed regulator bottom shell, and the side, away from the speed regulator mounting support, of the speed regulator bottom shell is provided with a speed regulator shell and a speed regulator upper cover; a pull rod is vertically arranged in the speed regulator shell, the lower end of the pull rod is installed on a sewing machine pedal through a pedal pull rod, and a grating control mechanism is arranged on the speed regulator shell. The sewing machine pedal drives the pedal pull rod to move, the pedal pull rod drives the pull rod to move, the pull rod drives the positioning sleeve to move, the positioning sleeve drives the sliding block, the grating piece support and the grating piece to move through the cylindrical pin, the grating piece moves along the detection sliding groove of the grating piece reading head, and the grating piece reading head generates a control signal. And a stable and reliable control signal can be generated according to the moving distance, speed and direction of the grating sheet.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machines, in particular to a sewing machine pedal based on grating ruler technology. Background Art

[0002] The pedal of a sewing machine is the main part of human-machine interaction, and the speed regulator is a key component. The speed regulators of different brands of electronic control solutions vary greatly, and the speed regulator is highly correlated with operability. Sewing machine products also have great differences in product control performance due to the use of electronic control solutions from different brands.

[0003] In view of the above problems, an improved sewing machine pedal based on grating scale technology is now designed. Summary of the invention

[0004] The object of the present invention is to provide a sewing machine pedal based on grating scale technology to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sewing machine pedal based on grating ruler technology comprises a pedal pull rod and a speed regulator mounting bracket, wherein the speed regulator mounting bracket is mounted with a speed regulator bottom shell by self-tapping screws, a speed regulator housing and a speed regulator upper cover are sequentially mounted with self-tapping screws on a side of the speed regulator bottom shell away from the speed regulator mounting bracket, a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber and a sixth chamber are sequentially opened inside the speed regulator housing from top to bottom, the first chamber, the second chamber, the third chamber, the fourth chamber, the fifth chamber and the sixth chamber are interconnected, the second chamber and the fourth chamber have the same diameter, the first chamber, the third chamber, the fifth chamber and the sixth chamber have larger diameters than the second chamber and the fourth chamber, a pull rod is vertically arranged inside the first chamber, the second chamber, the third chamber, the fourth chamber, the fifth chamber and the sixth chamber, the lower end of the pull rod is mounted on the sewing machine foot pedal by the pedal pull rod, and a grating control mechanism for speed regulation detection is arranged on the speed regulator housing.

[0007] As a further solution of the present invention: the grating control mechanism includes a hexagon socket flat round head screw and a cylindrical pin, a slide groove is provided on the side wall of the speed regulator housing where the third chamber, the fourth chamber and the fifth chamber are located, a circuit board is installed on the upper end of the side wall of the speed regulator housing close to the speed regulator upper cover, a grating reader and a magnetic induction component are installed on the side of the circuit board away from the speed regulator housing, a grating is vertically slidably connected in the slide groove of the magnetic induction component, grating brackets for driving the grating to move up and down are installed on both sides of the grating, a magnet mounting hole corresponding to the magnetic induction component is provided on the upper end of the magnet mounting hole, and a magnet corresponding to the magnetic induction component is installed inside the magnet mounting hole A magnet used in conjunction with the components, a slider is provided at the lower end of the side wall of the grating plate bracket close to the speed regulator housing, the grating plate bracket, grating plate and slider are connected together by hexagon socket flat round head screws, a pin hole is provided on the pull rod, a positioning sleeve is sleeved on the side wall of the pull rod, the positioning sleeve is slidably arranged inside the fourth chamber, the cylindrical pin passes through the positioning sleeve, the pin hole and the slide groove on the side wall of the speed regulator housing and is connected to the grating plate bracket, grating plate and slider by hexagon socket flat round head screws, a first resistance assembly is provided at the upper end of the pull rod, a second resistance assembly is provided inside the second chamber and the third chamber, and a third resistance assembly is provided inside the fifth chamber and the sixth chamber.

[0008] As a further solution of the present invention: the first resistance assembly includes a compression spring inside the pull rod, a groove is provided at the top of the pull rod, the compression spring inside the pull rod is installed in the groove at the top of the pull rod, a probe is installed at the end of the compression spring inside the pull rod away from the pin hole, and a hole retaining ring is installed at the upper end of the pull rod to prevent the probe from popping out completely.

[0009] As a further solution of the present invention: the second resistance assembly includes a sliding sleeve, which is slidably arranged inside the second chamber, and the sliding sleeve is slidably sleeved on the side wall of the pull rod. A stopper for preventing the sliding sleeve from moving upward is arranged between the first chamber and the second chamber, and a second limiting gasket is slidably arranged inside the third chamber, and the second limiting gasket is slidably sleeved on the side wall of the pull rod. A first spring is installed on the upper end of the second limiting gasket, and the upper end of the first spring is installed on the lower end of the sliding sleeve, and the first spring is sleeved on the side wall of the pull rod.

[0010] As a further solution of the present invention: the third resistance assembly includes a pressure regulating sleeve, which is installed inside the sixth chamber, and the pressure regulating sleeve is slidably sleeved on the side wall of the pull rod. The inside of the fifth chamber is slidably provided with a first limit gasket, and the first limit gasket is slidably sleeved on the side wall of the pull rod. A retaining ring for blocking the first limit gasket is provided between the fifth chamber and the sixth chamber, and a second spring is installed at the upper end of the pressure regulating sleeve, and the upper end of the second spring is installed at the lower end of the first limit gasket, and the second spring is sleeved on the side wall of the pull rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention takes the speed regulator out of the scope of the electronic control solution and uses mature grating ruler technology to ensure that the speed regulator has good control performance and can generate stable and high-precision control signals. There are a large number of parallel slits of equal width and spacing on the grating sheet, and the spacing is usually 1μm, which is similar to a scale with μm-level accuracy. The optical reader can effectively identify the grating sheet and obtain relevant parameters through the photoelectric effect.

[0013] The present invention drives a pedal pull rod to move through a sewing machine foot pedal, the pedal pull rod drives a pull rod to move, the pull rod drives a positioning sleeve to move, the positioning sleeve drives a slider, a grating plate bracket and a grating plate to move through a cylindrical pin, the grating plate moves along a detection slide groove of a grating plate reader, the grating plate reader generates a control signal, and a stable and reliable control signal can be generated according to the moving distance, speed and direction of the grating plate.

[0014] The present invention provides a practical and effective technical support solution for the standardization of sewing machine pedals, so that the problem of large differences in sewing machine pedals can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the explosion structure of the speed regulator in the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the circuit board in the present invention.

[0018] Figure 4 It is a structural schematic diagram of the speed regulator housing in the present invention.

[0019] Figure 5 It is a structural schematic diagram of the grating control mechanism in the present invention.

[0020] Figure 6 It is a structural schematic diagram of the positioning sleeve in the present invention at the origin position.

[0021] Figure 7 It is a schematic diagram of the structure in which the positioning sleeve moves downward in the present invention.

[0022] Figure 8 It is a schematic structural diagram of the positioning sleeve moving upward in the present invention.

[0023] Among them: 1. Speed ​​regulator cover; 2. Hexagon socket round head screw; 3. Grating; 4. Sliding block; 5. First limit washer; 6. Speed ​​regulator housing; 61. First chamber; 62. Second chamber; 63. Third chamber; 64. Fourth chamber; 65. Fifth chamber; 66. Sixth chamber; 7. Pressure regulating sleeve; 8. Cylindrical pin; 9. First spring; 10. Magnet mounting hole; 11. Speed ​​regulator mounting bracket; 12. Speed ​​regulator bottom shell; 13. Second spring; 14. Positioning sleeve; 15. Sliding sleeve; 16. Second limit washer; 17. Circuit board; 18. Magnet; 19. Grating bracket; 20. Probe; 21. Compression spring in pull rod; 22. Pull rod; 23. Retaining ring for hole; 24. Pin hole; 25. Grating reader; 26. Magnetic induction components; 27. Sewing machine pedal; 28. Pedal pull rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 8 In an embodiment of the present invention, a sewing machine pedal based on grating ruler technology includes a pedal pull rod 28 and a speed regulator mounting bracket 11, the speed regulator mounting bracket 11 is mounted with a speed regulator bottom shell 12 by self-tapping screws, and a speed regulator housing 6 and a speed regulator upper cover 1 are sequentially mounted on the side of the speed regulator bottom shell 12 away from the speed regulator mounting bracket 11 by self-tapping screws, and the interior of the speed regulator housing 6 is sequentially provided with a first chamber 61, a second chamber 62, a third chamber 63, a fourth chamber 64, a fifth chamber 65, and a sixth chamber 66 from top to bottom, wherein the first chamber 61, the second chamber 62, the third chamber 63, the fourth chamber 64, the fifth chamber 65, and the sixth chamber 66 are sequentially provided. The fourth chamber 64, the fifth chamber 65, and the sixth chamber 66 are interconnected, the second chamber 62 and the fourth chamber 64 have the same diameter, the first chamber 61, the third chamber 63, the fifth chamber 65, and the sixth chamber 66 have larger diameters than the second chamber 62 and the fourth chamber 64, and a pull rod 22 is vertically arranged inside the first chamber 61, the second chamber 62, the third chamber 63, the fourth chamber 64, the fifth chamber 65, and the sixth chamber 66, and the lower end of the pull rod 22 is installed on the sewing machine foot pedal 27 through the foot pull rod 28, and the speed regulator housing 6 is provided with a grating control mechanism for speed regulation detection.

[0026] The grating control mechanism includes a hexagon socket round head screw 2 and a cylindrical pin 8. A slide groove is provided on the side wall of the speed regulator housing 6 where the third chamber 63, the fourth chamber 64 and the fifth chamber 65 are located. A circuit board 17 is installed on the upper end of the side wall of the speed regulator housing 6 close to the speed regulator upper cover 1. A grating reader 25 and a magnetic induction component 26 are installed on the side of the circuit board 17 away from the speed regulator housing 6. A grating 3 is vertically slidably connected in the slide groove of the magnetic induction component 26. Grating brackets 19 for driving the grating 3 to move up and down are installed on both sides of the grating 3. A magnet mounting hole 10 corresponding to the magnetic induction component 26 is provided on the upper end of the grating bracket 19, and a magnet used in conjunction with the magnetic induction component 26 is installed inside the magnet mounting hole 10 18. A slider 4 is provided at the lower end of the side wall of the grating support 19 close to the speed regulator housing 6. The grating support 19, the grating 3 and the slider 4 are connected together by means of a hexagon socket flat round head screw 2. A pin hole 24 is provided on the pull rod 22. A positioning sleeve 14 is sleeved on the side wall of the pull rod 22. The positioning sleeve 14 is slidably arranged inside the fourth chamber 64. The cylindrical pin 8 passes through the positioning sleeve 14, the pin hole 24 and the slide groove on the side wall of the speed regulator housing 6 and is connected to the grating support 19, the grating 3 and the slider 4 by means of a hexagon socket flat round head screw 2. A first resistance assembly is provided at the upper end of the pull rod 22. A second resistance assembly is provided inside the second chamber 62 and the third chamber 63. A third resistance assembly is provided inside the fifth chamber 65 and the sixth chamber 66.

[0027] When in use, the sewing machine foot pedal 27 drives the foot pedal rod 28 to move, the foot pedal rod 28 drives the pull rod 22 to move, the pull rod 22 drives the positioning sleeve 14 to move, the positioning sleeve 14 drives the slider 4, the grating plate bracket 19 and the grating plate 3 to move through the cylindrical pin 8, the grating plate 3 moves along the detection slide groove of the grating plate reader 25, and the grating plate reader 25 generates a control signal.

[0028] The first resistance component includes a pull rod inner compression spring 21, the top of the pull rod 22 is provided with a groove, the pull rod inner compression spring 21 is installed in the groove at the top of the pull rod 22, the probe 20 is installed at the end of the pull rod inner compression spring 21 away from the pin hole 24, and the upper end of the pull rod 22 is installed with a hole retaining ring 23 for preventing the probe 20 from completely popping out.

[0029] The second resistance assembly includes a sleeve 15, which is slidably arranged inside the second chamber 62, and the sleeve 15 is slidably sleeved on the side wall of the pull rod 22. A block for preventing the sleeve 15 from moving upward is arranged between the first chamber 61 and the second chamber 62. A second limiting gasket 16 is slidably arranged inside the third chamber 63, and the second limiting gasket 16 is slidably sleeved on the side wall of the pull rod 22. A first spring 9 is installed on the upper end of the second limiting gasket 16, and the upper end of the first spring 9 is installed on the lower end of the sleeve 15, and the first spring 9 is sleeved on the side wall of the pull rod 22.

[0030] The third resistance assembly includes a pressure regulating sleeve 7, which is installed inside the sixth chamber 66. The pressure regulating sleeve 7 is slidably sleeved on the side wall of the pull rod 22. A first limiting gasket 5 is slidably arranged inside the fifth chamber 65. The first limiting gasket 5 is slidably sleeved on the side wall of the pull rod 22. A retaining ring for blocking the first limiting gasket 5 is arranged between the fifth chamber 65 and the sixth chamber 66. A second spring 13 is installed at the upper end of the pressure regulating sleeve 7. The upper end of the second spring 13 is installed at the lower end of the first limiting gasket 5. The second spring 13 is sleeved on the side wall of the pull rod 22.

[0031] Working principle of a sewing machine pedal based on grating ruler technology:

[0032] When the sewing machine pedal 27 is in the middle position:

[0033] The upper end of the probe 20 is pressed against the speed regulator housing 6, and the pull rod 22 is acted upon by the downward elastic force of the compression spring 21 inside the pull rod. The pull rod 22 drives the positioning sleeve 14 to press on the first limit gasket 5. At this time, the magnet 18 is located above the magnetic induction component 26 on the circuit board 17, and this position is marked as the origin.

[0034] The sewing machine foot pedal 27 is stepped forward, and the pull rod 22 is pulled downward:

[0035] The pull rod 22 moves vertically downward, and the pull rod 22 drives the positioning sleeve 14 to move downward. The positioning sleeve 14 presses down the first limit gasket 5, and the first limit gasket 5 presses down the second spring 13 to the lower limit position. At the same time, the positioning sleeve 14 drives the slider 4, the grating plate bracket 19 and the grating plate 3 to move downward through the cylindrical pin 8. The grating plate 3 moves along the detection slide groove of the grating plate reader 25, and the grating plate reader 25 generates a control signal.

[0036] The sewing machine foot pedal 27 is stepped back, and the pull rod 22 is pushed upward:

[0037] The pull rod 22 moves vertically upward, and the pull rod 22 drives the positioning sleeve 14 to move upward. The positioning sleeve 14 pushes the second limit gasket 16 to move upward. The second limit gasket 16 presses the first spring 9 to the upper limit position. At the same time, the positioning sleeve 14 drives the slider 4, the grating plate bracket 19 and the grating plate 3 to move upward through the cylindrical pin 8. The grating plate 3 moves along the detection slide groove of the grating plate reader 25, and the grating plate reader 25 generates a control signal. At the same time, the positioning sleeve 14 is pressed against the speed regulator housing 6 and is pressed into the pull rod 22.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A sewing machine pedal based on grating ruler technology, comprising a pedal pull rod (28) and a speed regulator mounting bracket (11), wherein the speed regulator mounting bracket (11) is mounted with a speed regulator bottom shell (12) by self-tapping screws, and a speed regulator housing (6) and a speed regulator upper cover (1) are sequentially mounted on the side of the speed regulator bottom shell (12) away from the speed regulator mounting bracket (11) by self-tapping screws, characterized in that: The speed regulator housing (6) is provided with a first chamber (61), a second chamber (62), a third chamber (63), a fourth chamber (64), a fifth chamber (65), and a sixth chamber (66) in sequence from top to bottom. The first chamber (61), the second chamber (62), the third chamber (63), the fourth chamber (64), the fifth chamber (65), and the sixth chamber (66) are interconnected. The second chamber (62) and the fourth chamber (64) have the same diameter. 3) The diameters of the fifth chamber (65) and the sixth chamber (66) are larger than those of the second chamber (62) and the fourth chamber (64); a pull rod (22) is vertically arranged inside the first chamber (61), the second chamber (62), the third chamber (63), the fourth chamber (64), the fifth chamber (65) and the sixth chamber (66); the lower end of the pull rod (22) is installed on the sewing machine foot pedal (27) through a foot pull rod (28); and a grating control mechanism for speed regulation detection is arranged on the speed regulator housing (6).

2. The sewing machine pedal based on grating ruler technology according to claim 1, characterized in that: The grating control mechanism comprises a hexagon socket round head screw (2) and a cylindrical pin (8); a slide groove is provided on the side wall of the speed regulator housing (6) where the third chamber (63), the fourth chamber (64) and the fifth chamber (65) are located; a circuit board (17) is installed on the upper end of the side wall of the speed regulator housing (6) close to the speed regulator upper cover (1); a grating piece reader (25) and a magnetic induction component (26) are installed on the side of the circuit board (17) away from the speed regulator housing (6); a grating piece (3) is vertically slidably connected in the slide groove of the magnetic induction component (26); grating piece brackets (19) for driving the grating piece (3) to move up and down are installed on both sides of the grating piece (3); a magnet mounting hole (10) corresponding to the magnetic induction component (26) is provided on the upper end of the grating piece bracket (19); a magnet (18) used in conjunction with the magnetic induction component (26) is installed inside the magnet mounting hole (10) The grating support (19) is provided with a slider (4) at the lower end of the side wall close to the speed regulator housing (6); the grating support (19), the grating (3) and the slider (4) are connected together by a hexagon socket round head screw (2); a pin hole (24) is provided on the pull rod (22); a positioning sleeve (14) is sleeved on the side wall of the pull rod (22); the positioning sleeve (14) is slidably arranged inside the fourth chamber (64); the cylindrical pin (8) is inserted into the fourth chamber (64) The positioning sleeve (14), the pin hole (24) and the slide groove on the side wall of the speed regulator housing (6) are connected together with the grating plate bracket (19), the grating plate (3) and the slider (4) by means of hexagon socket round head screws (2); a first resistance component is arranged at the upper end of the pull rod (22); a second resistance component is arranged inside the second chamber (62) and the third chamber (63); and a third resistance component is arranged inside the fifth chamber (65) and the sixth chamber (66).

3. The sewing machine pedal based on grating ruler technology according to claim 2, characterized in that: The first resistance component includes a tension rod inner compression spring (21), the top of the tension rod (22) is provided with a groove, the tension rod inner compression spring (21) is installed in the groove at the top of the tension rod (22), the end of the tension rod inner compression spring (21) away from the pin hole (24) is installed with a probe (20), and the upper end of the tension rod (22) is installed with a hole retaining ring (23) for preventing the probe (20) from completely popping out.

4. The sewing machine pedal based on grating ruler technology according to claim 2, characterized in that: The second resistance assembly includes a sleeve (15), the sleeve (15) is slidably arranged inside the second chamber (62), the sleeve (15) is slidably sleeved on the side wall of the pull rod (22), a stopper is arranged between the first chamber (61) and the second chamber (62) for preventing the sleeve (15) from moving upward, a second limiting gasket (16) is slidably arranged inside the third chamber (63), the second limiting gasket (16) is slidably sleeved on the side wall of the pull rod (22), a first spring (9) is installed at the upper end of the second limiting gasket (16), the upper end of the first spring (9) is installed at the lower end of the sleeve (15), and the first spring (9) is sleeved on the side wall of the pull rod (22).

5. The sewing machine pedal based on grating ruler technology according to claim 2, characterized in that: The third resistance assembly includes a pressure regulating sleeve (7), which is installed inside the sixth chamber (66). The pressure regulating sleeve (7) is slidably sleeved on the side wall of the pull rod (22). A first limiting gasket (5) is slidably arranged inside the fifth chamber (65), and the first limiting gasket (5) is slidably sleeved on the side wall of the pull rod (22). A retaining ring for blocking the first limiting gasket (5) is arranged between the fifth chamber (65) and the sixth chamber (66). A second spring (13) is installed at the upper end of the pressure regulating sleeve (7), and the upper end of the second spring (13) is installed at the lower end of the first limiting gasket (5). The second spring (13) is sleeved on the side wall of the pull rod (22).

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