Sewing machine table size detection device
By designing a sewing machine table plate size detection device including bottom groove, conveying roller, slide ruler and motion detection components, the problems of low efficiency and inability to accurately measure the internal dimensions of the table plate are solved, and efficient and accurate table plate size detection is achieved.
Patent Information
- Application Number
- CN202510231622.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-06-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional measurement tools are inefficient when detecting the size of the sewing machine table plate, and cannot accurately obtain the sizes at different positions inside the table plate, especially for areas with special size requirements, it is difficult to effectively measure.
A sewing machine plate size detection device including a bottom groove, multiple sets of conveying rollers, a slide ruler and a motion detection assembly is designed. The sliding of the slide ruler and the rotation of the rotation of the assembly enables accurate detection of the external and internal dimensions of the platen.
It improves detection efficiency and can quickly and accurately measure the outer and inner dimensions of the table plate, especially for areas with special dimension requirements, achieving multi-dimensional accurate detection.
Smart Images
Figure CN120212816A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sewing machine production, and specifically refers to a sewing machine table size detection device. Background Art
[0002] The sewing machine table is one of the important accessories of the sewing machine. It is installed at the bottom of the sewing machine, and its main functions are to stabilize the position of the sewing machine, prevent movement, and keep the sewing machine stable. The table has various styles, such as one-drawer or multi-drawer folding type, cabinet type, writing desk type, etc. These designs make the sewing machine more convenient and flexible to use. The size standards of sewing machine tables vary according to different application scenarios and types. According to the light industry standard QB / T2377-1998 of the People's Republic of China, the size standard of the household sewing machine table is 2400×1200×1750mm, and the size of the industrial sewing machine table is usually larger. The size and shape of the table directly affect the comfort of sewing, the convenience of operation, and the sewing effect. Therefore, the detection of the sewing machine table size is also very important.
[0003] Traditional measuring tools rely on rulers such as steel tape measures and straight rulers to directly measure the key dimensions of the table, such as length, width, and thickness. To ensure the measurement accuracy, multiple measurements are required and the average value is taken to reduce errors, resulting in low detection efficiency. Some detection tools cannot obtain the dimensions at different positions inside the detected table, and it is difficult to effectively measure the areas with special size requirements inside the table. Summary of the Invention
[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides a sewing machine table size detection device, which at least partially solves the problems raised in the above background art.
[0005] The technical solution adopted by the present invention is as follows: A sewing machine table size detection device includes a bottom groove, multiple groups of conveying rollers, a sliding ruler, and a movable detection assembly. Multiple groups of the conveying rollers are arranged at intervals along the length direction of the bottom groove; The sliding ruler is arranged along the width direction perpendicular to the length direction of the bottom groove and is configured to slide along the width direction; The movable detection assembly is movably arranged at one end of the sliding ruler; Wherein, high edges and low edges are respectively arranged on both sides of the bottom groove, a bottom edge is arranged at the end of the bottom groove, one end of the bottom edge is flush with the high edge and an accommodation cavity is arranged inside, the other end of the bottom edge is flush with the low edge and a chute is arranged, and the chute extends into the accommodation cavity.
[0006] Furthermore, the movable detection component includes a movable ruler, a T-slot, a T-slider, a first fixed ruler, a second fixed ruler and a floating ruler. One end of the movable ruler can be rotatably arranged on the slider. The T-slot is arranged on the upper wall of the movable ruler. The T-slider is provided with two groups. The two groups of T-slider can be slidably arranged in the T-slot. Support rods are provided on the T-slider. The first fixed ruler is arranged on one group of T-slider through the support rod, and the second fixed ruler is arranged on the other group of T-slider through the support rod. The second fixed ruler is arranged in parallel with the first fixed ruler, and the floating ruler is movably connected to the first fixed ruler and the second fixed ruler.
[0007] Furthermore, the movable scale is provided with a display component, and the display component includes a plurality of groups of pressure keys and scale lights of the same number, the pressure keys are movably embedded in the side walls of the movable scale, the scale lights are fixedly arranged on the upper part of the movable scale, a pressure column is provided on the back of the pressure key, a first conductive block is provided on the end of the pressure column, a second conductive block is provided on the movable scale, the second conductive block and the first conductive block are arranged close to each other, a spring is movably provided on the pressure column, one end of the spring is arranged against the pressure key, and the other end of the spring is arranged against the movable scale, and the first conductive block, the second conductive block, the scale lights are electrically connected to an external power supply to form a complete parallel circuit.
[0008] In a further embodiment, movable grooves are formed through the front and rear walls of the first fixed ruler, a wire hole is formed on the upper wall of the first fixed ruler, the wire hole is connected to the movable groove, and the second fixed ruler and the first fixed ruler have the same structure.
[0009] In a further embodiment, a first positioning component is provided in the movable groove, and the two ends of the floating ruler are movably provided on the first fixed ruler and the second fixed ruler respectively through the first positioning component, the first positioning component includes a directional square tube, a rectangular block, a threaded slide rod and a threaded knob, the directional square tube is slidably provided in the movable groove, the two ends of the floating ruler are movably provided in the directional square tube, the rectangular block is fixed on the directional square tube, and the rectangular block can be movably fitted in the first wire hole, the threaded slide rod is provided on the upper wall of the directional square tube, and the threaded knob is threadedly connected to the upper end of the threaded slide rod.
[0010] In a further embodiment, a second positioning component is provided above the storage cavity. The sliding ruler is provided with positioning holes at equal intervals, and the positioning holes are arranged in a matching manner with the positioning component. The second positioning component includes a fixing rod, a sleeve, a positioning rod, a limiting block, a first magnetic sheet and a second magnetic sheet. The fixing rod is arranged on the bottom edge where the storage cavity is located. The sleeve is movably arranged on the fixing rod. One end of the positioning rod is fixedly arranged on the side wall of the sleeve and the positioning rod is arranged in an L shape. The other end of the positioning rod is arranged in a matching manner with the diameter of the positioning hole. The limiting block is arranged at the top end of the fixing rod. The first magnetic sheet is fixedly arranged at the upper end of the sleeve. The second magnetic sheet is fixedly arranged at the lower end of the limiting block. The magnetism of the first magnetic sheet and the second magnetic sheet is arranged in a matching manner.
[0011] Further, a first pressure sensing area and a first indicating lamp are provided on the high side of the bottom groove. The first pressure sensing area is arranged on the inner wall of the high side, and the first indicating lamp is arranged on the upper wall of the high side.
[0012] Further, a second pressure sensing area and a second indicating lamp are provided on the bottom edge of the bottom groove. The second pressure sensing area is arranged on the inner wall of the bottom edge and is close to the storage cavity, and the second indicating lamp is arranged on the upper wall of the bottom edge.
[0013] In a further embodiment, scale grooves are provided on both the high side and the bottom edge, and the starting point of the scale groove is arranged at the intersection of the high side and the bottom edge.
[0014] The beneficial effects obtained by the present invention adopting the above structure are as follows: By sliding the sliding ruler from the storage cavity to the corresponding distance of the sliding groove according to the width of the table board before detection, it plays a role in accurately adapting to the width of the table board and provides a stable basis for subsequent detection; by rotating the movable detection component, it plays a role in driving the detection component to operate and effectively detecting the external dimensions of the table board; by rotating the movable scale to abut against the side wall of the table board, it plays a role in fixing the position of the table board and establishing a measurement reference, making the table board in close contact with the high side and the bottom edge, and thus being able to accurately read the peripheral dimension value of the detected table board; by the first fixed ruler, the second fixed ruler and the floating ruler, it plays a role as a multi-dimensional measuring tool and realizes accurate detection of the dimensions at different positions inside the table board. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the sewing machine table board size detection device proposed by the embodiment of the present invention; Figure 2 It is a top view of the sewing machine table board size detection device proposed by the embodiment of the present invention; Figure 3 For the embodiment of the present invention Figure 1 The enlarged view at A in; Figure 4 It is a partial structural schematic diagram of the display component proposed by the embodiment of the present invention; Figure 5 The circuit diagram of the display component proposed in the embodiment of the present invention; Figure 6 For the embodiment of the present invention Figure 1 The enlarged view at position B in the figure; Figure 7 For the embodiment of the present invention Figure 1 The enlarged view at position C in the figure.
[0016] Wherein, 1, bottom groove; 2, conveying roller; 3, sliding ruler; 4, movable detection component; 5, high side; 6, low side; 7, bottom edge; 8, storage cavity; 9, sliding groove; 10, movable scale; 11, T-shaped groove; 12, T-shaped slider; 13, first fixed ruler; 14, second fixed ruler; 15, floating ruler; 16, support rod; 17, display component; 18, pressure key; 19, scale lamp; 20, pressing column; 21, first conductive block; 22, second conductive block; 23, spring; 24, movable groove; 25, wire hole; 26, first positioning component; 27, directional square tube; 28, rectangular clamping block; 29, threaded sliding rod; 30, threaded knob; 31, second positioning component; 32, positioning hole; 33, fixed rod; 34, sleeve; 35, positioning rod; 36, limiting block; 37, first magnetic sheet; 38, second magnetic sheet; 39, first pressure sensing area; 40, first indicator lamp; 41, second pressure sensing area; 42, second indicator lamp; 43, scale groove.
[0017] The accompanying drawings are used to provide a further understanding of the embodiments and constitute a part of the specification. They are used to explain the embodiments together with the present embodiments and do not constitute a limitation to the embodiments. Detailed implementation manners
[0018] Next, the technical solutions in the embodiments 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments without creative efforts belong to the scope of protection.
[0019] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments.
[0020] Traditional measuring tools rely on rulers such as steel tape measures and straight rulers to directly measure the key dimensions of the table board, such as length, width, and thickness. To ensure measurement accuracy, multiple people need to cooperate, and multiple measurements are taken and averaged to reduce errors. The detection efficiency is relatively low. Some detection tools cannot obtain the dimensions of different positions inside the detected table board, and it is difficult to effectively measure the areas with special dimensional requirements inside the table board.
[0021] After recognizing the above problems, the present application proposes and discloses a sewing machine table board size detection device, which can quickly detect the sizes of different positions outside and inside the sewing machine table board, improving the detection efficiency.
[0022] Referring to the accompanying drawings, as Figure 1 and Figure 2 shown, the present disclosure embodiment provides a sewing machine table board size detection device, including a bottom groove 1, multiple groups of conveying rollers 2, a sliding ruler 3, and a movable detection component 4. Multiple groups of the conveying rollers 2 are arranged at intervals along the length direction of the bottom groove 1. The sliding ruler 3 is arranged along the width direction perpendicular to the length direction of the bottom groove 1 and is configured to be slidable along the width direction. The movable detection component 4 is movably arranged at one end of the sliding ruler 3. Wherein, high edges 5 and low edges 6 are respectively arranged on both sides of the bottom groove 1, a bottom edge 7 is arranged at the end of the bottom groove 1, one end of the bottom edge 7 is flush with the high edge 5 and has a receiving cavity 8 inside, the other end of the bottom edge 7 is flush with the low edge 6 and has a sliding groove 9, and the sliding groove 9 extends and is arranged in the receiving cavity 8.
[0023] In this embodiment, before detection, the sliding ruler 3 is slid out from the receiving cavity 8 to the corresponding distance of the sliding groove 9 according to the width of the table board. The sewing machine table board is conveyed along the high edge 5 of the bottom groove 1 to the bottom edge 7 of the bottom groove 1, and then the movable detection component 4 is rotated to detect the table board. The height of the low edge 6 of the bottom groove 1 is set lower, so as to facilitate the movable detection component 4 to move above the low edge 6 to detect the table board.
[0024] As Figure 1 、 Figure 2 and Figure 3As shown, the activity detection component 4 includes an activity scale 10, a T-shaped groove 11, a T-shaped slider 12, a first fixed scale 13, a second fixed scale 14, and a floating scale 15. One end of the activity scale 10 is rotatably arranged on the sliding scale 3. The T-shaped groove 11 is arranged on the upper wall of the activity scale 10. There are two groups of T-shaped sliders 12, and the two groups of T-shaped sliders 12 are slidably arranged in the T-shaped groove 11. Support rods 16 are arranged on the T-shaped sliders 12. The first fixed scale 13 is arranged on one group of T-shaped sliders 12 through the support rod 16. The second fixed scale 14 is arranged on the other group of T-shaped sliders 12 through the support rod 16. The second fixed scale 14 is arranged parallel to the first fixed scale 13. The floating scale 15 is movably connected to the first fixed scale 13 and the second fixed scale 14.
[0025] In this embodiment, rotate the activity scale 10 to abut against the side wall of the platen, so that the platen is in close contact with the high side 5 and the bottom side 7. Then, read the peripheral dimension value of the detection platen through the activity scale 10, and detect the dimensions at different positions inside the platen through the first fixed scale 13, the second fixed scale 14, and the floating scale 15.
[0026] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a display component 17 is arranged on the activity scale 10. The display component 17 includes several groups of pressure keys 18 and scale lights 19 with the same number. The pressure keys 18 are movably embedded in the side wall of the activity scale 10. The scale lights 19 are fixedly arranged on the upper part of the activity scale 10. A pressure column 20 is arranged on the back of the pressure key 18. A first conductive block 21 is arranged at the end of the pressure column 20. A second conductive block 22 is arranged on the activity scale 10. The second conductive block 22 and the first conductive block 21 are arranged to be close to each other. A spring 23 is movably arranged on the pressure column 20. One end of the spring 23 abuts against the pressure key 18, and the other end of the spring 23 abuts against the activity scale 10. The first conductive block 21, the second conductive block 22, and the scale lights 19 are electrically connected to an external power supply to form a complete parallel circuit.
[0027] In this embodiment, the first conductive block 21 and the second conductive block 22 together form a contactor. The two ends of the spring 23 abut against the pressure key 18 and the activity scale 10 respectively, so that the first conductive block 21 and the second conductive block 22 are separated from contact. When the activity scale 10 abuts against the side wall of the platen, the platen squeezes some of the pressure keys 18 to retract. After the pressure keys 18 compress the spring 23 and contract, the first conductive block 21 and the second conductive block 22 come into contact. At this time, the scale lights 19 corresponding to the pressed pressure keys 18 emit light to illuminate the scale, which is convenient for quick detection and reading.
[0028] As Figure 1 , Figure 2 andFigure 6 As shown, the front and rear walls of the first fixed ruler 13 are penetrated with an activity slot 24, and a wire hole 25 is provided on the upper wall of the first fixed ruler 13. The wire hole 25 is in through connection with the activity slot 24. The second fixed ruler 14 has the same structure as the first fixed ruler 13.
[0029] As Figure 1 、 Figure 2 and Figure 6 As shown, a first positioning component 26 is provided in the activity slot 24. Both ends of the floating ruler 15 are movably arranged on the first fixed ruler 13 and the second fixed ruler 14 through the first positioning component 26 respectively. The first positioning component 26 includes a directional square tube 27, a rectangular clamping block 28, a threaded sliding rod 29 and a threaded knob 30. The directional square tube 27 is slidably arranged in the activity slot 24. Both ends of the floating ruler 15 are movably arranged in the directional square tube 27. The rectangular clamping block 28 is fixedly arranged on the directional square tube 27, and the rectangular clamping block 28 can be movably attached to the wire hole 25. The threaded sliding rod 29 is arranged on the upper wall of the directional square tube 27, and the threaded knob 30 is threadedly connected to the upper end of the threaded sliding rod 29.
[0030] In this embodiment, when the threaded knob 30 is rotated close to the directional square tube 27, the threaded knob 30 and the directional square tube 27 can fix the end position of the floating ruler 15 by pressing the first fixed ruler 13. The rectangular clamping block 28 can prevent the directional square tube 27 from rotating, so as to ensure that both ends of the floating ruler 15 are always perpendicular to the first fixed ruler 13 and the second fixed ruler 14, which is convenient for the floating ruler 15 to effectively measure the area with special dimensional requirements inside the sewing machine table board. Before sliding the first fixed ruler 13 or the second fixed ruler 14, the threaded knob 30 can be loosened, so that the floating ruler 15 can freely slide in the directional square tube 27 on the second fixed ruler 14, thus facilitating the adjustment of the distance between the first fixed ruler 13 and the second fixed ruler 14.
[0031] As Figure 1 、 Figure 2 and Figure 7As shown in the figure, a second positioning component 31 is provided above the storage cavity 8. The sliding ruler 3 is provided with positioning holes 32 at equal intervals. The positioning holes 32 are arranged in a matching manner with the positioning component. The second positioning component 31 includes a fixing rod 33, a sleeve 34, a positioning rod 35, a limiting block 36, a first magnetic sheet 37 and a second magnetic sheet 38. The fixing rod 33 is arranged on the bottom edge 7 where the storage cavity 8 is located. The sleeve 34 is movably arranged on the fixing rod 33. One end of the positioning rod 35 is fixedly arranged on the side wall of the sleeve 34 and the positioning rod 35 is arranged in an L shape. The other end of the positioning rod 35 is arranged in a matching manner with the diameter of the positioning hole 32. The limiting block 36 is arranged at the top end of the fixing rod 33. The first magnetic sheet 37 is fixedly arranged at the upper end of the sleeve 34. The second magnetic sheet 38 is fixedly arranged at the lower end of the limiting block 36. The magnetism of the first magnetic sheet 37 and the second magnetic sheet 38 is arranged in a matching manner.
[0032] In this embodiment, the sleeve 34 can drive the positioning rod 35 to be fixedly close to the limiting block 36 through the magnetic attraction force of the first magnetic sheet 37 and the second magnetic sheet 38. When the sliding ruler 3 slides out from the storage cavity 8 to the corresponding distance of the sliding groove 9 according to the width of the sewing machine table board, the positioning rod 35 is pulled to drive the first magnetic sheet 37 and the second magnetic sheet 38 to separate, and then the positioning rod 35 is inserted into the corresponding positioning hole 32. According to the light industry standard QB / T2377-1998 of the People's Republic of China, the size standard of the household sewing machine table board is 2400×1200×1750mm. Therefore, by setting the positioning holes 32 at fixed positions on the sliding ruler 3, the positioning of the fixed length of the sliding ruler 3 can be realized, and the length of the sliding ruler 3 does not need to be adjusted repeatedly during inspection. When detecting a larger industrial sewing machine table board, the sliding ruler 3 can be slid out from the storage cavity 8 for a longer distance, and then positioned through the second positioning component 31, which is convenient for detection.
[0033] As Figure 1 and Figure 2 shown in the figure, a first pressure sensing area 39 and a first warning light 40 are provided on the high side 5 of the bottom groove 1. The first pressure sensing area 39 is arranged on the inner wall of the high side 5. The first warning light 40 is arranged on the upper wall of the high side 5.
[0034] As Figure 1 and Figure 2 shown in the figure, a second pressure sensing area 41 and a second warning light 42 are provided on the bottom edge 7 of the bottom groove 1. The second pressure sensing area 41 is arranged on the inner wall of the bottom edge 7 and is close to the storage cavity 8. The second warning light 42 is arranged on the upper wall of the bottom edge 7.
[0035] In this embodiment, the pressure sensing area and the warning lamp can be directly connected through a closed circuit or connected through a signal conversion circuit. When the sewing machine tabletop is in contact with the bottom edge 7 and the high edge 5, the first pressure sensing area 39 and the second pressure sensing area 41 respectively sense the pressure of the tabletop. After the internal circuit is closed, the external power supply current directly passes through the first warning lamp 40 and the second warning lamp 42 respectively to make them emit light, reminding the inspector that the position of the tabletop is accurate and in place, and the next operation and reading inspection can be carried out.
[0036] In this embodiment, scale grooves 43 are provided on both the high edge 5 and the bottom edge 7, and the starting points of the scale grooves 43 are located at the intersection of the high edge 5 and the bottom edge 7, which is convenient for the inspector to perform inspection and reading.
[0037] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0038] Although the embodiments have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit. The scope of this embodiment is defined by the appended claims and their equivalents.
[0039] The above describes the implementation manners, and such description is not restrictive. What is shown in the drawings is only one of the implementation manners, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the creative purpose, they shall fall within the protection scope.
Claims
1. A sewing machine table size detection device, characterized in that: It comprises a bottom trough (1), a plurality of groups of conveying rollers (2), a sliding ruler (3) and an activity detection component (4), A plurality of groups of conveying rollers (2) are arranged at intervals along the length direction of the bottom groove (1); The slide rule (3) is arranged along the width direction of the bottom groove (1) perpendicular to the length direction, and is configured to slide along the width direction; The activity detection component (4) is movably arranged at one end of the sliding ruler (3); The bottom groove (1) is provided with a high side (5) and a low side (6) on both sides, respectively; a bottom side (7) is provided at the end of the bottom groove (1); one end of the bottom side (7) is flush with the high side (5) and a storage cavity (8) is provided inside; the other end of the bottom side (7) is flush with the low side (6) and a slide groove (9) is provided; the slide groove (9) extends into the storage cavity (8).
2. The sewing machine table size detection device according to claim 1, characterized in that: The activity detection assembly (4) comprises a movable scale (10), a T-shaped slot (11), a T-shaped slider (12), a first fixed scale (13), a second fixed scale (14) and a floating scale (15); one end of the movable scale (10) is rotatably arranged on the slider (3); the T-shaped slot (11) is arranged on the upper wall of the movable scale (10); two groups of T-shaped sliders (12) are provided; the two groups of T-shaped sliders (12) are slidably arranged in the T-shaped slots (11); support rods (16) are provided on the T-shaped sliders (12); the first fixed scale (13) is arranged on one group of the T-shaped sliders (12) through the support rod (16); the second fixed scale (14) is arranged on the other group of the T-shaped sliders (12) through the support rod (16); the second fixed scale (14) is arranged in parallel with the first fixed scale (13); and the floating scale (15) is movably connected to the first fixed scale (13) and the second fixed scale (14).
3. The sewing machine table size detection device according to claim 2, characterized in that: The movable scale (10) is provided with a display assembly (17), the display assembly (17) comprising a plurality of groups of pressure keys (18) and scale lights (19) of the same number, the pressure keys (18) being movably embedded in the side wall of the movable scale (10), the scale lights (19) being fixedly arranged on the upper part of the movable scale (10), a pressure column (20) being arranged on the back of the pressure keys (18), a first conductive block (21) being arranged at the end of the pressure column (20), a second conductive block (22) being arranged close to the first conductive block (21), a spring (23) being movably arranged on the pressure column (20), one end of the spring (23) being arranged against the pressure keys (18), and the other end of the spring (23) being arranged against the movable scale (10), the first conductive block (21), the second conductive block (22) and the scale lights (19) being electrically connected to an external power supply to form a complete parallel circuit.
4. The sewing machine table size detection device according to claim 2, characterized in that: The front and rear walls of the first fixed ruler (13) are penetrated by movable grooves (24); the upper wall of the first fixed ruler (13) is provided with a wire hole (25); the wire hole (25) is connected to the movable groove (24); and the second fixed ruler (14) and the first fixed ruler (13) have the same structure.
5. The sewing machine table size detection device according to claim 4, characterized in that: A first positioning assembly (26) is provided in the movable groove (24), and two ends of the floating ruler (15) are movably arranged on the first fixed ruler (13) and the second fixed ruler (14) respectively through the first positioning assembly (26). The first positioning assembly (26) comprises a directional square tube (27), a rectangular clamping block (28), a threaded slide rod (29) and a threaded knob (30). The directional square tube (27) is slidably arranged in the movable groove (24), and two ends of the floating ruler (15) are movably arranged in the directional square tube (27). The rectangular clamping block (28) is fixedly arranged on the directional square tube (27), and the rectangular clamping block (28) can be movably fitted in the first wire hole (25). The threaded slide rod (29) is arranged on the upper wall of the directional square tube (27), and the threaded knob (30) is threadedly connected to the upper end of the threaded slide rod (29).
6. The sewing machine table size detection device according to claim 1, characterized in that: A second positioning assembly (31) is provided above the storage cavity (8); positioning holes (32) are provided on the slide ruler (3) at equal intervals; the positioning holes (32) are arranged to match the positioning assembly; the second positioning assembly (31) comprises a fixing rod (33), a sleeve (34), a positioning rod (35), a limit block (36), a first magnetic sheet (37) and a second magnetic sheet (38); the fixing rod (33) is provided on the bottom edge (7) where the storage cavity (8) is located; the sleeve (34) is movably provided on the fixing rod (3 3), one end of the positioning rod (35) is fixedly arranged on the side wall of the sleeve (34) and the positioning rod (35) is arranged in an L-shape, the other end of the positioning rod (35) is arranged to match the diameter of the positioning hole (32), the limit block (36) is arranged at the top of the fixing rod (33), the first magnetic sheet (37) is fixedly arranged on the upper end of the sleeve (34), the second magnetic sheet (38) is fixedly arranged on the lower end of the limit block (36), and the magnetic properties of the first magnetic sheet (37) and the second magnetic sheet (38) are arranged to match.
7. The sewing machine table size detection device according to claim 1, characterized in that: The high side (5) of the bottom groove (1) is provided with a first pressure sensing area (39) and a first warning light (40); the first pressure sensing area (39) is provided on the inner wall of the high side (5); and the first warning light (40) is provided on the upper wall of the high side (5).
8. The sewing machine table size detection device according to claim 7, characterized in that: The bottom edge (7) of the bottom groove (1) is provided with a second pressure sensing area (41) and a second warning light (42); the second pressure sensing area (41) is provided on the inner wall of the bottom edge (7) and is arranged close to the storage cavity (8); and the second warning light (42) is provided on the upper wall of the bottom edge (7).
9. The sewing machine table size detection device according to claim 1, characterized in that: The high side (5) and the bottom side (7) are both provided with a scale groove (43), and the starting point of the scale groove (43) is located at the intersection of the high side (5) and the bottom side (7).