Sewing machine motor pedal controller

Abstract

The utility model relates to the field of controllers, in particular to a sewing machine motor pedal controller. A sewing machine motor pedal controller comprises a bottom shell, a treading cover for a user to tread, a treading cover reset spring, a circuit board, a Hall element, a magnetic block, a magnetic block seat and a magnetic block seat reset spring. A magnetic block seat guide rail is formed on the bottom shell; the magnetic block seat is vertically arranged relative to the sliding direction of the magnetic block seat guide rail and is vertical to the circuit board; the rotating axis of the pedal cover relative to the bottom shell is parallel to the circuit board; the top of the magnetic block base is arranged to be an arc face and abuts against the treading cover. When the treading cover is treaded, the treading cover extrudes the magnetic block seat, so that the magnetic block seat slides downwards along the magnetic block seat guide rail. The beneficial effects of the utility model are that the change of the relative position of the magnetic block and the Hall element is linear, so that the current adjustable interval of the Hall element can be increased, and the control precision can be improved. The installation of the magnetic block is separated from the treading cover, so that the processing error of the treading cover and the installation error of the treading cover are prevented from influencing the position of the magnetic block.

Description

Technical Field

[0001] The utility model relates to the field of controllers, in particular to a foot controller for a sewing machine motor. Background Art

[0002] The sewing machine controller is the core control part for adjusting the motor speed of the sewing machine. Usually, a magnetic block is arranged on the swing arm of the sewing machine speed regulator. By using the rotation of the swing arm to control the relative position of the magnetic block and the Hall element, the adjustment of the motor speed is realized.

[0003] The patent application of CN202020203081.6 discloses a Hall type foot pedal speed regulator, in which the magnetic block is installed on the swing arm. The installation error of the swing arm rotating shaft and the structural error of the long arm structure will both affect the position of the magnetic block. This error will cause the change of the magnetic flux sensed by the Hall element and result in unstable speed regulation. In addition, the swing arm drives the magnetic block to rotate relative to the Hall element, and the movement between the two is non-linear, so that the adjustable current range of the Hall element is relatively small, resulting in a decrease in control accuracy. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a foot controller for a sewing machine motor to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A foot controller for a sewing machine motor includes: a bottom case, a stepping cover for the user to step on, a stepping cover return spring, a circuit board, a Hall element, a magnetic block, a magnetic block seat and a magnetic block seat return spring;

[0007] The bottom case forms a receiving cavity for receiving the circuit board; the circuit board is arranged in the receiving cavity; the stepping cover is rotatably installed on the bottom case and covers the receiving cavity; the stepping cover return spring is arranged between the bottom case and the stepping cover; the Hall element is installed on the circuit board; the magnetic block is installed on the magnetic block seat; the bottom case forms a magnetic block seat guide rail; the magnetic block seat slides along the magnetic block seat guide rail; the magnetic block seat return spring is located between the magnetic block seat and the bottom case;

[0008] The direction in which the magnetic block seat slides relative to the magnetic block seat guide rail is vertically arranged and perpendicular to the circuit board; the axis of rotation of the stepping cover relative to the bottom case is parallel to the circuit board; the top of the magnetic block seat is set to be an arc surface and abuts against the stepping cover; when the stepping cover is stepped on, the stepping cover presses the magnetic block seat, causing the magnetic block seat to slide downward along the magnetic block seat guide rail.

[0009] As a further solution of the present utility model: slide bars are formed on both the left and right sides of the magnet block seat; a spring groove that opens backward is formed at the rear side of the magnet block seat; the magnet block is installed on the front side of the magnet block seat; the magnet block seat guide rail is formed with a vertically arranged rear wall and two side walls; the rear wall connects the two side walls; the side walls are formed with sliding grooves for the guide slide bars to slide; the rear wall blocks the side that the spring groove opens backward; the rear wall and the two side walls wrap the magnet block seat from three sides; at least one of the side walls is formed with an upper limit hook block; a lower limit hook block that cooperates with the upper limit hook block to prevent the magnet block seat from separating from the magnet block seat guide rail is formed on the magnet block seat; the tops of the upper limit hook blocks and the bottoms of the lower limit hook blocks are both set as inclined plane structures.

[0010] As a further solution of the present utility model: the stepping cover is formed with a pressing surface that abuts against the top of the magnet block seat, and the pressing surface is an arc surface.

[0011] As a further solution of the present utility model: the bottom case is formed with spring lower positioning posts; the magnet block seat is formed with spring upper positioning posts; both ends of the magnet block seat return spring are respectively sleeved between the spring lower positioning posts and the spring upper positioning posts.

[0012] As a further solution of the present utility model: a through hole is provided in the middle of the circuit board, forming a return shape; the magnet block seat guide rail passes through the through hole.

[0013] As a further solution of the present utility model: heat sinks are provided on both sides of the circuit board; the heat sinks are perpendicular to the circuit board.

[0014] As a further solution of the present utility model: the rotation axis of the stepping cover rotating relative to the bottom case is located at one end of the bottom case; a column sleeve for positioning the stepping cover return spring is formed at the other end of the bottom case; the bottom of the stepping cover return spring is located in the column sleeve; the stepping cover is formed with a limit post for positioning the stepping cover return spring; the top of the stepping cover return spring is sleeved on the limit post.

[0015] Compared with the prior art, the beneficial effects of the present utility model are: the structure is optimized, the movement of the Hall element is not driven by the torque generated by stepping, but the vertical force generated by stepping is used to drive the magnet to move vertically. The magnet and the Hall element move along a straight line, and the change in their relative positions is linear, so that the adjustable range of the Hall element current can be increased and the control accuracy can be improved.

[0016] The installation of the magnet is separated from the rotation structure of stepping, that is, the stepping cover, to avoid the machining error of the stepping cover and the installation error of the stepping cover affecting the position of the magnet.

[0017] The structure of the magnet block seat guide rail and the structure of the magnet block seat ensure relatively high strength. The top of the magnet block seat is set as an arc surface to avoid the influence of the torque generated by the rotation of the stepping cover on the position of the magnet, and the vertical force is used to directly drive the movement of the magnet.

[0018] The middle part of the circuit board is provided with an exposed hole, forming a double-square shape; the magnet block seat guide rail passes through the exposed hole. The relatively moderate position of the magnet block seat guide rail, compared with being close to the pedal cover rotating shaft, ensures the stroke of the magnet block and reduces the requirement for the detection accuracy of the Hall element, thereby reducing the cost of the Hall element; compared with the method of being far from the pedal cover rotating shaft, it avoids excessive height, which would require higher strength, reducing the material cost of the bottom shell and the mold cost of the bottom shell.

[0019] Other features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of a sewing machine motor foot controller of the present utility model;

[0021] Figure 2 is Figure 1 a front view of a sewing machine motor foot controller in removing the cable wire;

[0022] Figure 3 is Figure 2 a right view of the structure in ;

[0023] Figure 4 is Figure 2 a sectional view of the structure in along the line A-A;

[0024] Figure 5 is Figure 2 a perspective view of the structure in removing the pedal cover;

[0025] Figure 6 is Figure 5 a plan view of the structure in ;

[0026] Figure 7 is Figure 1 a schematic diagram of a pedal cover of a sewing machine motor foot controller in ;

[0027] Figure 8 is Figure 5 a schematic diagram of the structure in removing the circuit board;

[0028] Figure 9 is Figure 8 a partial enlarged view of the structure in ;

[0029] Figure 10 is Figure 9 a schematic diagram of the magnet block seat and the magnet block in ;

[0030] Figure 11 is Figure 10 a schematic diagram of the magnet block seat and the magnet block from another perspective in.

[0031] List of attached reference numerals: Sewing machine motor foot controller 100, bottom case 11, magnet block seat guide rail 111, spring lower positioning post 1101, bushing 1102, rear wall 112, side wall 113, chute 1131, upper limit hook block 1132, stepping cover 12, extrusion surface 121, limit post 122, stepping cover return spring 13, circuit board 20, Hall element 21, heat sink 22, magnet block 31, magnet block seat 32, slide bar 321, spring groove 322, lower limit hook block 323, spring upper positioning post 324, magnet block seat return spring 33. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 11 , in the embodiment of the present invention, a sewing machine motor foot controller 100 includes: a bottom case 11, a stepping cover 12 for the user to step on, a stepping cover return spring 13, a circuit board 20, a Hall element 21, a magnet block 31, a magnet block seat 32, and a magnet block seat return spring 33.

[0034] The bottom case 11 forms a receiving cavity for receiving the circuit board 20. The circuit board 20 is disposed in the receiving cavity. The stepping cover 12 is rotatably mounted to the bottom case 11 and covers the receiving cavity. The stepping cover return spring 13 is disposed between the bottom case 11 and the stepping cover 12. The Hall element 21 is mounted to the circuit board 20. The magnet block 31 is mounted to the magnet block seat 32. The bottom case 11 forms a magnet block seat guide rail 111. The magnet block seat 32 slides along the magnet block seat guide rail 111. The magnet block seat return spring 33 is located between the magnet block seat 32 and the bottom case 11. The magnet block seat return spring 33 can be a torsion spring or a compression spring. As a specific implementation manner, the magnet block seat return spring 33 is a compression spring. The magnet block seat return spring 33 is a cylindrical helical spring.

[0035] The sliding direction of the magnet block seat 32 relative to the magnet block seat guide rail 111 is vertically disposed and perpendicular to the circuit board 20. The axis of rotation of the stepping cover 12 relative to the bottom case 11 is parallel to the circuit board 20. The top of the magnet block seat 32 is provided as an arc surface and abuts against the stepping cover 12. When the stepping cover 12 is stepped on, the stepping cover 12 presses the magnet block seat 32, causing the magnet block seat 32 to slide downward along the magnet block seat guide rail 111.

[0036] As a preferred embodiment, slide bars 321 are formed on both the left and right sides of the magnet block base 32. A spring groove 322 that opens backward is formed on the rear side of the magnet block base 32. The magnet block 31 is installed on the front side of the magnet block base 32.

[0037] The magnet block base guide rail 111 is formed with a vertically arranged rear wall 112 and two side walls 113. The rear wall 112 connects the two side walls 113.

[0038] The side wall 113 is formed with a chute 1131 for the guide slide bar 321 to slide. The rear wall 112 blocks the side that the spring groove 322 opens backward. The rear wall 112 and the two side walls 113 wrap the magnet block base 32 from three sides.

[0039] At least one of the side walls 113 is formed with an upper limit hook block 1132. A lower limit hook block 323 that cooperates with the upper limit hook block 1132 to prevent the magnet block base 32 from separating from the magnet block base guide rail 111 is formed on the magnet block base 32.

[0040] The top of the upper limit hook block 1132 and the bottom of the lower limit hook block 323 are both set as inclined surface structures.

[0041] [[ID=I5]]The setting of the magnet block base 32 and the magnet block base guide rail 111 ensures high structural strength. In addition, during installation, the magnet block base 32 can be directly pressed from top to bottom. Through the inclined surface structures at the top of the upper limit hook block 1132 and the bottom of the lower limit hook block 323, the lower limit hook block 323 is guided to be squeezed below the upper limit hook block 1132, and then the upper limit hook block 1132 is used to block the lower limit hook block 323 from disengaging upward.

[0042] As a preferred embodiment, the stepping cover 12 is formed with a pressing surface 121 that abuts against the top of the magnet block base 32, and the pressing surface 121 is an arc surface. The torque of the stepping cover 12 is converted into a vertical force, and the arc surface structure reduces the horizontal force.

[0043] As a specific embodiment, the bottom case 11 is formed with a spring lower positioning post 1101. The magnet block base 32 is formed with a spring upper positioning post 324.

[0044] The two ends of the magnet block return spring 33 are respectively sleeved between the spring lower positioning post 1101 and the spring upper positioning post 324.

[0045] As a preferred embodiment, a through hole is provided in the middle of the circuit board 20, forming a shape like a Chinese character 'hui'. The magnet block base guide rail 111 passes through the through hole.

[0046] As a specific embodiment, heat sinks 22 are provided on both sides of the circuit board 20. The heat sinks 22 are perpendicular to the circuit board 20.

[0047] As a specific implementation manner, the rotation axis of the stepping cover 12 rotating relative to the bottom case 11 is located at one end of the bottom case 11.

[0048] At the other end of the bottom case 11, a sleeve 1102 for positioning the stepping cover return spring 13 is formed. The bottom of the stepping cover return spring 13 is located within the sleeve 1102. The stepping cover 12 is formed with a limit post 122 for positioning the stepping cover return spring 13. The top of the stepping cover return spring 13 is sleeved on the limit post 122.

[0049] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0050] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sewing machine motor foot controller (100), characterized in that, Comprising: A bottom case (11), a stepping cover (12) for the user to step on, a stepping cover return spring (13), a circuit board (20), a Hall element (21), a magnetic block (31), a magnetic block seat (32), and a magnetic block seat return spring (33); The bottom case (11) forms a receiving cavity for receiving the circuit board (20); the circuit board (20) is disposed in the receiving cavity; the stepping cover (12) is rotatably mounted to the bottom case (11) and covers the receiving cavity; the stepping cover return spring (13) is disposed between the bottom case (11) and the stepping cover (12); the Hall element (21) is mounted to the circuit board (20); the magnetic block (31) is mounted to the magnetic block seat (32); the bottom case (11) forms a magnetic block seat guide rail (111); the magnetic block seat (32) slides along the magnetic block seat guide rail (111); the magnetic block seat return spring (33) is located between the magnetic block seat (32) and the bottom case (11); The direction in which the magnetic block seat (32) slides relative to the magnetic block seat guide rail (111) is vertically arranged and perpendicular to the circuit board (20); the axis of rotation of the stepping cover (12) relative to the bottom case (11) is parallel to the circuit board (20); the top of the magnetic block seat (32) is provided as an arc surface and abuts against the stepping cover (12); when the stepping cover (12) is stepped on, the stepping cover (12) presses the magnetic block seat (32), causing the magnetic block seat (32) to slide downward along the magnetic block seat guide rail (111).

2. The sewing machine motor foot controller (100) according to claim 1, wherein Sliding strips (321) are formed on both the left and right sides of the magnetic block seat (32); a spring groove (322) that opens backward is formed on the rear side of the magnetic block seat (32); the magnetic block (31) is mounted to the front side of the magnetic block seat (32); The magnetic block seat guide rail (111) forms a vertically arranged rear wall (112) and two side walls (113); the rear wall (112) connects the two side walls (113); The side wall (113) forms a sliding groove (1131) for guiding the sliding of the sliding strip (321); the rear wall (112) shields the side of the spring groove (322) that opens backward; the rear wall (112) and the two side walls (113) wrap the magnetic block seat (32) from three sides; At least one of the side walls (113) forms an upper limit hook block (1132); a lower limit hook block (323) that cooperates with the upper limit hook block (1132) to prevent the magnetic block seat (32) from separating from the magnetic block seat guide rail (111) is formed on the magnetic block seat (32); The tops of the upper limit hook block (1132) and the bottoms of the lower limit hook block (323) are both provided with inclined surface structures.

3. The sewing machine motor foot controller (100) according to claim 2, wherein The stepping cover (12) is formed with a pressing surface (121) that abuts against the top of the magnet block seat (32), and the pressing surface (121) is an arc surface.

4. A sewing machine motor foot controller (100) according to claim 2, wherein The bottom case (11) is formed with a lower spring positioning post (1101); the magnet block seat (32) is formed with an upper spring positioning post (324); Both ends of the magnet block return spring (33) are respectively sleeved between the lower spring positioning post (1101) and the upper spring positioning post (324).

5. A sewing machine motor foot controller (100) according to claim 1, wherein A through hole is provided in the middle of the circuit board (20), forming a return shape; the magnet block guide rail (111) passes through the through hole.

6. A sewing machine motor foot controller (100) according to claim 1, wherein Heat sinks (22) are provided on both sides of the circuit board (20); the heat sinks (22) are perpendicular to the circuit board (20).

7. A sewing machine motor foot controller (100) according to claim 1, wherein The rotation axis of the stepping cover (12) rotating relative to the bottom case (11) is located at one end of the bottom case (11); A column sleeve (1102) for positioning the stepping cover return spring (13) is formed at the other end of the bottom case (11); the bottom of the stepping cover return spring (13) is located within the column sleeve (1102); the stepping cover (12) is formed with a limit post (122) for positioning the stepping cover return spring (13); the top of the stepping cover return spring (13) is sleeved on the limit post (122).

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