Sewing machine pedal based on grating ruler technology

Abstract

The application discloses a sewing machine pedal based on a 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, the side, away from the speed regulator mounting support, of the speed regulator bottom shell is provided with a speed regulator shell body and a speed regulator upper cover, the inside of the speed regulator shell body is vertically provided with a pull rod, the lower end of the pull rod is mounted on a sewing machine pedal through the pedal pull rod, and the speed regulator shell body is provided with a grating control mechanism.The pedal pull rod is moved by the sewing machine pedal, the pull rod is moved by the pedal pull rod, the positioning sleeve is moved by the pull rod, the slide block, the grating piece support and the grating piece are moved by the positioning sleeve through the cylindrical pin, the grating piece is moved along the detection sliding groove of the grating piece reading head, the grating piece reading head generates a control signal, and the stable and reliable control signal can be generated according to the moving distance, the speed and the direction of the grating piece.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, specifically a sewing machine pedal based on grating ruler technology. Background Technology

[0002] The foot pedal of a sewing machine is a key part of the human-machine interface, and the speed controller is a crucial component within it. Speed ​​controllers from different brands using different electronic control schemes vary greatly, and the speed controller is highly correlated with operability. Consequently, the different electronic control schemes used in sewing machines result in significant differences in their operability.

[0003] To address the aforementioned issues, an improved sewing machine pedal based on grating ruler technology is now designed. Summary of the Invention

[0004] The purpose of this invention is to provide a sewing machine pedal based on grating ruler technology to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A sewing machine pedal based on grating ruler technology includes a foot pedal lever and a speed controller mounting bracket. The speed controller mounting bracket is fitted with a speed controller bottom shell via self-tapping screws. On the side of the speed controller bottom shell away from the mounting bracket, a speed controller housing and a speed controller top cover are sequentially fitted with self-tapping screws. The speed controller housing has, from top to bottom, six chambers arranged in sequence: a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, and a sixth chamber. These chambers are interconnected. The second and fourth chambers have the same diameter, while the diameters of the first, third, fifth, and sixth chambers are all larger than those of the second and fourth chambers. A lever is vertically installed inside each of the six chambers, and the lower end of the lever is mounted on the sewing machine foot pedal via a foot pedal lever. The speed controller housing is equipped with a grating control mechanism for speed adjustment detection.

[0006] As a further aspect of the present invention: the grating control mechanism includes an internal hexagonal flat-head screw and a cylindrical pin; a first sliding groove is formed on the side wall of the speed controller housing where the third, fourth, and fifth chambers are located; a circuit board is installed on the upper end of the side wall of the speed controller housing near the speed controller cover; a grating plate reader and a magnetic induction element are installed on the side of the circuit board away from the speed controller housing; a grating plate is vertically slidably connected in the second sliding groove of the magnetic induction element; grating plate supports for driving the grating plate to move up and down are installed on both sides of the grating plate; a magnet mounting hole corresponding to the magnetic induction element is formed at the upper end of the grating plate support; and a magnetic induction element is installed inside the magnet mounting hole. The magnet is used in conjunction with the components. A slider is provided at the lower end of the side wall of the grating plate bracket near the speed controller housing. The grating plate bracket, grating plate, and slider are connected together by hexagonal flat head screws. A pin hole is provided on the pull rod. A positioning sleeve is fitted on the side wall of the pull rod. The positioning sleeve is slidably disposed inside the fourth chamber. The cylindrical pin passes through the positioning sleeve, the pin hole, and the first sliding groove on the side wall of the speed controller housing and is connected to the grating plate bracket, grating plate, and slider by hexagonal flat head screws. A first resistance component is provided at the upper end of the pull rod. A second resistance component is provided inside the second and third chambers. A third resistance component is provided inside the fifth and sixth chambers.

[0007] As a further embodiment of the present invention: the first resistance component includes a pull rod inner compression spring, the top of the pull rod has a groove, the pull rod inner compression spring is installed in the groove at the top of the pull rod, a probe is installed at the end of the pull rod inner compression spring away from the pin hole, and a retaining ring for preventing the probe from being completely ejected is installed at the upper end of the pull rod.

[0008] As a further embodiment of the present invention: the second resistance component includes a sliding sleeve, which is slidably disposed inside the second chamber and slidably sleeved on the side wall of the pull rod. A stop block for preventing the sliding sleeve from moving upward is provided between the first chamber and the second chamber. A second limiting washer is slidably disposed inside the third chamber and slidably sleeved on the side wall of the pull rod. A first spring is installed at the upper end of the second limiting washer, and the upper end of the first spring is installed at the lower end of the sliding sleeve and sleeved on the side wall of the pull rod.

[0009] As a further embodiment of the present invention: the third resistance component includes a pressure regulating sleeve, which is installed inside the sixth chamber and slidably sleeved on the side wall of the pull rod. A first limiting gasket is slidably disposed inside the fifth chamber and slidably sleeved on the side wall of the pull rod. A retaining ring for blocking the first limiting gasket is disposed between the fifth chamber and the sixth chamber. 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 limiting gasket and sleeved on the side wall of the pull rod.

[0010] Compared with the prior art, the beneficial effects of the present invention are: This invention separates the speed controller from the scope of electronic control schemes and uses mature grating ruler technology, which makes the speed controller have good control performance and can generate stable and high-precision control signals. The grating plate has a large number of parallel slits of equal width and spacing, with a spacing of 1µm, similar to a ruler with µm-level precision. The optical reading head can effectively identify the grating plate and obtain relevant parameters through photoelectric effect.

[0011] This invention uses a sewing machine foot pedal to move a foot pedal lever, which in turn moves a pull rod, which in turn moves a positioning sleeve. The positioning sleeve, via a cylindrical pin, moves a slider, a grating sheet support, and a grating sheet. The grating sheet moves along the detection groove of the grating sheet reader head, which generates a control signal. Based on the moving distance, speed, and direction of the grating sheet, a stable and reliable control signal can be generated.

[0012] This invention provides a practical and effective technical support solution for the standardization of sewing machine foot pedals, thereby solving the problem of large differences in sewing machine foot pedals. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the exploded structure of the speed controller in this invention.

[0015] Figure 3 This is a schematic diagram of the circuit board structure in this invention.

[0016] Figure 4 This is a schematic diagram of the speed controller housing in this invention.

[0017] Figure 5 This is a schematic diagram of the grating control mechanism in this invention.

[0018] Figure 6 This is a schematic diagram of the positioning sleeve in the origin position in this invention.

[0019] Figure 7This is a schematic diagram of the downward movement of the positioning sleeve in this invention.

[0020] Figure 8 This is a schematic diagram of the upward movement of the positioning sleeve in this invention.

[0021] The components include: 1. Speed ​​controller top cover; 2. Hex socket head cap screw; 3. Grating sheet; 4. Slider; 5. First limit washer; 6. Speed ​​controller 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 ​​controller mounting bracket; 12. Speed ​​controller bottom shell; 13. Second spring; 14. Positioning sleeve; 15. Sliding sleeve; 16. Second limit washer; 17. Circuit board; 18. Magnet; 19. Grating sheet bracket; 20. Probe; 21. Pull rod inner compression spring; 22. Pull rod; 23. Hole retaining ring; 24. Pin hole; 25. Grating sheet reader; 26. Magnetic induction component; 27. Sewing machine foot pedal; 28. Foot pedal pull rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-8In this embodiment of the invention, a sewing machine pedal based on grating ruler technology includes a foot pedal lever 28 and a speed controller mounting bracket 11. The speed controller mounting bracket 11 is fitted with a speed controller bottom shell 12 via self-tapping screws. On the side of the speed controller bottom shell 12 away from the speed controller mounting bracket 11, a speed controller housing 6 and a speed controller top cover 1 are sequentially fitted with self-tapping screws. The speed controller housing 6 has, from top to bottom, 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. The first chamber 61, the second chamber 62, the third chamber 63, the fourth chamber 64, the fifth chamber 65, the sixth chamber 66... 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 diameters of the first chamber 61, the third chamber 63, the fifth chamber 65, and the sixth chamber 66 are all larger than those of the second chamber 62 and the fourth chamber 64. A pull rod 22 is vertically installed 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 mounted on the sewing machine foot pedal 27 via a foot pedal 28. A grating control mechanism for speed regulation detection is provided on the speed regulator housing 6.

[0024] The grating control mechanism includes an internal hexagonal flat-head screw 2 and a cylindrical pin 8. A first sliding groove is formed on the side wall of the speed controller housing 6, where the third chamber 63, fourth chamber 64, and fifth chamber 65 are located. A circuit board 17 is mounted on the upper end of the side wall of the speed controller housing 6 near the speed controller cover 1. A grating plate reader 25 and a magnetic induction element 26 are mounted on the side of the circuit board 17 away from the speed controller housing 6. A grating plate 3 is vertically slidably connected in the second sliding groove of the magnetic induction element 26. Grating plate supports 19 for moving the grating plate 3 up and down are mounted on both sides of the grating plate 3. A magnet mounting hole 10 corresponding to the magnetic induction element 26 is formed at the upper end of the grating plate support 19. A magnet for cooperating with the magnetic induction element 26 is installed inside the magnet mounting hole 10. Iron 18, the grating plate bracket 19 is provided with a slider 4 at the lower end of the side wall near the speed controller housing 6, the grating plate bracket 19, the grating plate 3 and the slider 4 are connected together by an internal hexagonal flat round head screw 2, the pull rod 22 is provided with a pin hole 24, the pull rod 22 is fitted with a positioning sleeve 14 on the side wall, the positioning sleeve 14 is slidably disposed inside the fourth chamber 64, the cylindrical pin 8 passes through the positioning sleeve 14, the pin hole 24 and the first sliding groove on the side wall of the speed controller housing 6 and is connected to the grating plate bracket 19, the grating plate 3 and the slider 4 by an internal hexagonal flat round head screw 2, the upper end of the pull rod 22 is provided with a first resistance component, the second chamber 62 and the third chamber 63 are provided with a second resistance component, and the fifth chamber 65 and the sixth chamber 66 are provided with a third resistance component.

[0025] In use, the sewing machine foot pedal 27 drives the foot pedal lever 28 to move, the foot pedal lever 28 drives the lever 22 to move, the lever 22 drives the positioning sleeve 14 to move, and 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 groove of the grating plate reader 25, and the grating plate reader 25 generates a control signal.

[0026] The first resistance assembly includes an inner compression spring 21 on the pull rod. The top of the pull rod 22 has a groove. The inner compression spring 21 is installed in the groove at the top of the pull rod 22. A probe 20 is installed at the end of the inner compression spring 21 away from the pin hole 24. A retaining ring 23 for preventing the probe 20 from being fully ejected is installed at the upper end of the pull rod 22.

[0027] The second resistance component includes a sliding sleeve 15, which is slidably disposed inside the second chamber 62 and slidably sleeved on the side wall of the pull rod 22. A stop block for preventing the sliding sleeve 15 from moving upward is provided between the first chamber 61 and the second chamber 62. A second limiting washer 16 is slidably disposed inside the third chamber 63 and 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 washer 16 and the upper end of the first spring 9 is installed at the lower end of the sliding sleeve 15. The first spring 9 is sleeved on the side wall of the pull rod 22.

[0028] The third resistance component includes a pressure regulating sleeve 7, which is installed inside the sixth chamber 66 and slidably sleeved on the side wall of the pull rod 22. A first limiting gasket 5 is slidably disposed inside the fifth chamber 65 and slidably sleeved on the side wall of the pull rod 22. A retaining ring for blocking the first limiting gasket 5 is provided 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 and sleeved on the side wall of the pull rod 22.

[0029] The working principle of a sewing machine pedal based on grating ruler technology: When the sewing machine foot pedal 27 is in the middle position: The upper end of the probe 20 rests on the speed controller housing 6. The pull rod 22 is subjected to the downward elastic force of the inner compression spring 21. The pull rod 22 drives the positioning sleeve 14 to press on the first limiting pad 5. At this time, the magnet 18 is located above the magnetic induction component 26 on the circuit board 17, and this point is marked as the origin position.

[0030] When the sewing machine foot pedal 27 is pressed forward, the lever 22 is pulled downward. Pull rod 22 moves vertically downward, which drives positioning sleeve 14 to move downward. Positioning sleeve 14 presses down on first limiting pad 5, and first limiting pad 5 presses down on second spring 13 to the lower limit. At the same time, positioning sleeve 14 drives slider 4, grating plate bracket 19 and grating plate 3 to move downward through cylindrical pin 8. Grating plate 3 moves along the detection groove of grating plate reader 25, and grating plate reader 25 generates control signal.

[0031] When the sewing machine foot pedal 27 is pressed backward, the lever 22 is pushed upward. Pull rod 22 moves vertically upward, pull rod 22 drives positioning sleeve 14 to move upward, positioning sleeve 14 pushes second limit pad 16 to move upward, second limit pad 16 presses the first spring 9 to the upper limit position, at the same time positioning sleeve 14 drives slider 4, grating plate bracket 19 and grating plate 3 to move upward through cylindrical pin 8, grating plate 3 moves along the detection groove of grating plate reading head 25, grating plate reading head 25 generates control signal, at the same time positioning sleeve 14 presses against speed regulator housing 6 and is pressed into pull rod 22.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, 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 foot pedal lever (28) and a speed controller mounting bracket (11), wherein a speed controller bottom shell (12) is mounted on the speed controller mounting bracket (11) by self-tapping screws, and a speed controller housing (6) and a speed controller top cover (1) are sequentially mounted on the side of the speed controller bottom shell (12) away from the speed controller mounting bracket (11) by self-tapping screws, characterized in that, The speed regulator housing (6) has, from top to bottom, 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). These chambers are interconnected. The second chamber (62) and the fourth chamber (64) have the same diameter. The first chamber (61), the third chamber (63), the fourth chamber (64), the fifth chamber (65), and the sixth chamber (66) are connected to each other. 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). 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 vertically equipped with pull rods (22). The lower end of the pull rods (22) is installed on the sewing machine foot pedal (27) through the foot pedal pull rod (28). The speed regulator housing (6) is equipped with a grating control mechanism for speed regulation detection. The grating control mechanism includes an internal hexagonal flat head screw (2) and a cylindrical pin (8). The first sliding groove is provided on the side wall of the speed controller housing (6) where the third chamber (63), fourth chamber (64), and fifth chamber (65) are located. A circuit board (17) is installed on the upper end of the side wall of the speed controller housing (6) near the speed controller cover (1). A grating plate reader (25) and a magnetic induction element (26) are installed on the side of the circuit board (17) away from the speed controller housing (6). A grating plate (3) is vertically slidably connected in the second sliding groove of the magnetic induction element (26). Grating plate brackets (19) for driving the grating plate (3) to move up and down are installed on both sides of the grating plate (3). A magnet mounting hole (10) corresponding to the magnetic induction element (26) is opened at the upper end of the grating plate bracket (19). A magnet (18) for cooperating with the magnetic induction element (26) is installed inside the magnet mounting hole (10). The grating plate bracket (19) is provided with a slider (4) at the lower end of the side wall near the speed controller housing (6). The grating plate bracket (19), the grating plate (3) and the slider (4) are connected together by an internal hexagonal flat head screw (2). The pull rod (22) is provided with a pin hole (24). The pull rod (22) is fitted with a positioning sleeve (14) on its side wall. The positioning sleeve (14) is slidably disposed inside the fourth chamber (64). The cylindrical pin (8) passes through the positioning sleeve (14), the pin hole (24) and the first groove on the side wall of the speed controller housing (6) and is connected to the grating plate bracket (19), the grating plate (3) and the slider (4) by an internal hexagonal flat head screw (2). The upper end of the pull rod (22) is provided with a first resistance component. The second chamber (62) and the third chamber (63) are provided with a second resistance component. The fifth chamber (65) and the sixth chamber (66) are provided with a third resistance component.

2. A sewing machine pedal based on grating ruler technology according to claim 1, characterized in that, The first resistance assembly 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), a probe (20) is installed at the end of the pull rod inner compression spring (21) away from the pin hole (24), and a hole retaining ring (23) is installed at the upper end of the pull rod (22) to prevent the probe (20) from being completely ejected.

3. A sewing machine pedal based on grating ruler technology according to claim 1, characterized in that, The second resistance component includes a sliding sleeve (15), which is slidably disposed inside the second chamber (62) and slidably sleeved on the side wall of the pull rod (22). A stop block for preventing the sliding sleeve (15) from moving upward is provided between the first chamber (61) and the second chamber (62). A second limiting pad (16) is slidably disposed inside the third chamber (63), which 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 pad (16), and the upper end of the first spring (9) is installed at the lower end of the sliding sleeve (15). The first spring (9) is sleeved on the side wall of the pull rod (22).

4. A sewing machine pedal based on grating ruler technology according to claim 1, characterized in that, The third resistance component 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 pad (5) is slidably disposed inside the fifth chamber (65). The first limiting pad (5) is slidably sleeved on the side wall of the pull rod (22). A retaining ring for blocking the first limiting pad (5) is disposed 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 pad (5). The second spring (13) is sleeved on the side wall of the pull rod (22).

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