Visual thread trapper and sewing machine

Abstract

The utility model discloses a visualized thread trapper and sewing machine belongs to the thread trapper technical field, including mounting core shaft, thread trapper piece, stop cover, spring and adjusting cover, mounting core shaft one end axial extension and passes through thread trapper piece and stop cover in proper order and then with adjusting cover threaded connection, the spring is connected between stop cover and adjusting cover, and the adjusting cover is connected with the thread trapper piece. A Hall element is installed at one end of the installation mandrel and is in electric signal connection with the clamping force display module, and a permanent magnet matched with the Hall element is installed on the adjusting cover. According to the utility model, by utilizing the Hall effect, when the adjusting cover rotates on the mounting mandrel, the adjusting cover extrudes or releases the spring and drives the permanent magnet to synchronously and axially move, so that the permanent magnet and the Hall element relatively move; the clamping force display module can display the magnitude of the wire clamping force between the two wire clamping pieces according to the magnetic field change detected by the Hall element, numerical display of the wire clamping force is achieved, and the adjusting precision of the wire clamping force can be improved.

Description

Technical Field

[0001] This utility model relates to the field of thread clamp technology, specifically to a visual thread clamp and sewing machine. Background Technology

[0002] When sewing different fabrics, different thread clamping forces are often required to achieve the desired stitch effect. The appropriate thread clamping force depends entirely on the sewing machine operator's experience. Conventional thread clamps can only adjust the clamping pressure, but cannot intuitively display the current clamping pressure. This means that there is no reference clamping pressure as an adjustment benchmark when changing fabrics, which brings great inconvenience to the sewing industry.

[0003] Patent document CN219010650U discloses a thread clamping force visualization adjuster and a sewing machine. This adjuster utilizes the linear relationship between the thread clamping force and the axial displacement of the movable cover to achieve visual adjustment of the thread clamping force between the two clamping plates. However, in actual production, adjusting the thread clamping force between the two clamping plates requires reading the real-time value of the clamping force using a scale on the movable cover. The scale cannot accurately reflect the real-time value of the clamping force, leading to errors in the adjustment accuracy and reducing the overall precision of the thread clamping force adjustment.

[0004] Therefore, how to improve the precise adjustment of the wire clamping force between the two clamping plates has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide a visual wire clamp to solve the technical problem of low adjustment accuracy in existing visual clamps.

[0006] The technical solution adopted by this utility model is as follows: a visual wire clamp, including a mounting spindle, a wire clamping plate, a stop cover, a spring, and an adjusting cover. One end of the mounting spindle extends axially and passes through the wire clamping plate and the stop cover in sequence before being threadedly connected to the adjusting cover. The spring is connected between the stop cover and the adjusting cover. A Hall element is installed at one end of the mounting spindle. The Hall element is electrically connected to a clamping force display module. A permanent magnet that cooperates with the Hall element is installed on the adjusting cover.

[0007] Preferably, a stop sleeve is fitted on the mounting mandrel, the stop sleeve is located between the adjusting cover and the spring, and the stop sleeve is axially slidably connected to the mounting mandrel.

[0008] Preferably, the mounting mandrel has a positioning plane extending in the axial direction, and the stop sleeve has a stop plane that matches the positioning plane in the through hole.

[0009] Preferably, the mounting mandrel includes a mounting threaded section, a smooth shaft section, and an adjusting threaded section arranged sequentially along the axial direction. The clamping plate and the stop cover are sleeved on the smooth shaft section. One end of the adjusting threaded section is threadedly connected to the adjusting cover, and the positioning plane is formed on the adjusting threaded section.

[0010] Preferably, a stationary toothed ring is formed at one end of the stop sleeve near the adjusting cover, and a movable toothed ring that meshes with the stationary toothed ring is formed on the side of the adjusting cover near the stop sleeve.

[0011] Preferably, the mounting mandrel is provided with a coaxial wire guide hole.

[0012] Preferably, a Hall bracket is mounted on one end of the mounting mandrel, and a mounting groove is formed at the end of the Hall bracket. The Hall element is fixedly mounted in the mounting groove. A wire is provided in the wire hole, one end of the wire is connected to the Hall element, and the other end of the wire is connected to the clamping force display module.

[0013] Preferably, the permanent magnet is a magnetic steel, and the magnetic steel is fixedly installed at the end of the adjustment cover away from the Hall element.

[0014] Preferably, the permanent magnet is a magnetic ring, and the adjusting cover is formed with a mounting ring groove, the mounting ring groove is coaxial with the adjusting cover, and the magnetic ring is housed in the mounting ring groove.

[0015] Preferably, the clamping force display module includes a processor and a display.

[0016] Preferably, a sponge pad is fitted onto the mounting mandrel, and the sponge pad is located between the clamping plate and the stop cover.

[0017] The second objective of this invention is to provide a sewing machine that includes the aforementioned visual thread clamp.

[0018] The beneficial effects of this utility model are:

[0019] This invention utilizes the Hall effect, with a permanent magnet mounted on the adjusting cover and a Hall element installed at the threaded end of the mounting spindle connected to the adjusting cover. The Hall element is then electrically connected to the clamping force display module. When the adjusting cover rotates on the mounting spindle, it compresses or releases the spring, causing the permanent magnet to move axially synchronously. This results in relative movement between the permanent magnet and the Hall element. The clamping force display module can then display the magnitude of the wire clamping force between the two clamping plates based on the magnetic field changes detected by the Hall element, achieving a numerical display of the wire clamping force and improving the adjustment accuracy of the wire clamping force. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of the visual wire clamp of this utility model;

[0021] Figure 2 This is the second schematic diagram of the structure of the visual wire clamp of this utility model;

[0022] Figure 3 This is an exploded view of the visual wire clamp of this utility model;

[0023] Figure 4 A first-person perspective 3D schematic diagram of the adjustable cover;

[0024] Figure 5 A two-dimensional perspective diagram of the adjustable cover;

[0025] Figure 6 A three-dimensional schematic diagram of the stop sleeve;

[0026] Figure 7 A three-dimensional schematic diagram of a Hall effect support;

[0027] Figure 8 A three-dimensional schematic diagram for installing the mandrel.

[0028] Explanation of the reference numerals in the figure:

[0029] 1. Install the mandrel; 1a. Install the threaded section; 1b. Open shaft section; 1c. Adjust the threaded section; 1d. Positioning plane; 1e. Wire guide hole;

[0030] 2. Wire clamp;

[0031] 3. Stop cover;

[0032] 4. Spring;

[0033] 5. Adjusting cover; 5a. Moving gear ring; 5b. Mounting ring groove; 5c. Mounting groove;

[0034] 6. Hall element;

[0035] 7. Clamping force display module; 7a. Processor; 7b. Display;

[0036] 8. Permanent magnet;

[0037] 9. Stop sleeve; 9a. Stationary gear ring; 9b. Through hole; 9c. Stopping surface;

[0038] 10. Hall bracket; 10a. Mounting slot;

[0039] 11. Wire;

[0040] 12. Sponge pad;

[0041] 13. Cover plate. Detailed Implementation

[0042] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0043] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0046] Examples, such as Figures 1-8 As shown, a visual wire clamp includes a mounting spindle 1, a wire clamping plate 2, a stop cover 3, a spring 4, and an adjusting cover 5. One end of the mounting spindle 1 extends axially and passes through the wire clamping plate 2 and the stop cover 3 in sequence before being threadedly connected to the adjusting cover 5. The spring 4 is connected between the stop cover 3 and the adjusting cover 5. A Hall element 6 is installed at the end of the mounting spindle 1 connected to the adjusting cover 5. The Hall element 6 is electrically connected to a clamping force display module 7, and a permanent magnet 8 that cooperates with the Hall element 6 is installed on the adjusting cover 5.

[0047] This invention utilizes the Hall effect. A permanent magnet 8 is installed on the adjusting cover 5, and a Hall element 6 is installed at the end of the mounting spindle 1 that is threaded to the adjusting cover 5. The Hall element 6 is electrically connected to the clamping force display module 7. When the adjusting cover 5 rotates on the mounting spindle 1, the adjusting cover 5, while compressing or releasing the spring 4, will drive the permanent magnet 8 to move axially synchronously, thereby causing the permanent magnet 8 and the Hall element 6 to move relative to each other. The clamping force display module 7 can display the magnitude of the wire clamping force between the two clamping plates 2 according to the magnetic field change detected by the Hall element 6, realizing the numerical display of the wire clamping force, and thus improving the adjustment accuracy of the wire clamping force.

[0048] Specific embodiment 1, such as Figures 1-5 As shown, a visual wire clamp includes a mounting spindle 1, a wire clamping plate 2, a stop cover 3, a spring 4, and an adjusting cover 5.

[0049] One end of the mounting mandrel 1 extends axially, and the end of the mounting mandrel 1 is threadedly connected to the adjusting cover 5 after passing through the clamping plate 2 and the stop cover 3 in sequence.

[0050] Specifically, the mounting mandrel 1 includes a mounting thread section 1a, a smooth shaft section 1b, and an adjusting thread section 1c arranged coaxially. One end of the smooth shaft section 1b is fixedly connected to one end of the mounting thread section 1a, and the other end of the smooth shaft section 1b is fixedly connected to one end of the adjusting thread section 1c. The radial dimension of the smooth shaft section 1b is larger than that of the mounting thread section 1a and the adjusting thread section 1c.

[0051] There are two clamping pieces 2, which are placed face to face on the optical axis section 1b of the mounting mandrel 1, and the clamping pieces 2 can reciprocate along the axial direction of the mounting mandrel 1.

[0052] The stop cover 3 is located between the clamping piece 2 and the adjusting cover 5. The opening of the stop cover 3 faces the adjusting cover 5. The stop cover 3 is sleeved on the optical axis section 1b of the mounting spindle 1, and the stop cover 3 can reciprocate along the axial direction of the mounting spindle 1.

[0053] The spring 4 is sleeved on the mounting spindle 1, with one end of the spring 4 abutting against the stop cover 3 and the other end of the spring 4 abutting against the adjusting cover 5, and is used to provide clamping force for the two clamping plates 2.

[0054] The adjusting cover 5 has a threaded hole formed on it. The threaded hole is coaxially arranged with the adjusting cover 5. One end of the mounting spindle 1 is threaded into the threaded hole, that is, the other end of the adjusting threaded section 1c of the mounting spindle 1 is threaded into the threaded hole of the adjusting cover 5. A Hall element 6 is fixedly installed at the end of the mounting spindle 1 that is connected to the adjusting cover 5.

[0055] The Hall element 6 is electrically connected to the clamping force display module 7, and a permanent magnet 8 that cooperates with the Hall element 6 is installed on the adjustment cover 5. When the adjustment cover 5 and the mounting spindle 1 rotate relative to each other, that is, when the adjustment cover 5 is turned, the magnetic field strength of the permanent magnet 8 acting on the Hall element 6 will change. The clamping force display module 7 can output the clamping force between the two clamping plates 2 according to the change in magnetic field strength detected by the Hall element 6.

[0056] Preferably, the electrical connection between the Hall element 6 and the clamping force display module 7 is achieved as follows:

[0057] like Figure 1 and Figure 8 As shown, the mounting mandrel 1 is hollow inside and forms a wire hole 1e. Both ends of the wire hole 1e extend in the axial direction and pass through the mounting mandrel 1. A wire 11 is placed inside the wire hole 1e. One end of the wire 11 is connected to the Hall element 6, and the other end of the wire 11 is connected to the clamping force display module 7.

[0058] The clamping force display module 7 includes a controller 7a and a display 7b. The controller 7a is connected to the Hall element 6 via a wire 11. The controller 7a is electrically connected to the display 7b. The controller 7a is used to convert the magnetic field strength detected by the Hall element into clamping force. The display 7b is used to display the magnitude of the clamping force.

[0059] More preferably, the fixed connection between the Hall element 6 and the mounting spindle 1 is achieved as follows:

[0060] like Figure 1 and Figure 7 As shown, a Hall bracket 10 is installed at one end of the mounting spindle 1. The Hall bracket 10 is annular and has a mounting slot 10a formed at one end. The mounting slot 10a is arranged radially and passes through the Hall bracket 10. The Hall bracket 10 is fixedly installed in the wire hole 1e of the mounting spindle 1, and the Hall element 6 is fixedly installed in the mounting slot 10a.

[0061] Specific embodiment 2, such as Figures 1-6 As shown, a visual wire clamp includes a mounting spindle 1, a wire clamping plate 2, a stop cover 3, a spring 4, an adjusting cover 5, and a stop sleeve 9.

[0062] The mounting mandrel 1 includes a mounting thread section 1a, a smooth shaft section 1b, and an adjusting thread section 1c arranged coaxially. One end of the smooth shaft section 1b is fixedly connected to one end of the mounting thread section 1a, and the other end of the smooth shaft section 1b is fixedly connected to one end of the adjusting thread section 1c. The radial dimension of the smooth shaft section 1b is larger than that of the mounting thread section 1a and the adjusting thread section 1c.

[0063] There are two clamping pieces 2, which are placed face to face on the optical axis section 1b of the mounting mandrel 1, and the clamping pieces 2 can reciprocate along the axial direction of the mounting mandrel 1.

[0064] The stop cover 3 is located between the clamping piece 2 and the adjusting cover 5. The opening of the stop cover 3 faces the adjusting cover 5. The stop cover 3 is sleeved on the optical axis section 1b of the mounting spindle 1, and the stop cover 3 can reciprocate along the axial direction of the mounting spindle 1.

[0065] Preferably, a sponge pad 12 is fitted on the mounting mandrel 1. The sponge pad 12 is located between the clamping plate 2 and the stop cover 3. The sponge pad 12 can evenly distribute the pressure applied by the spring 4 on the stop cover 3 onto the clamping plate 2.

[0066] The stop sleeve 9 is fitted onto the adjusting thread section 1c of the mounting spindle 1, and the stop sleeve 9 can reciprocate along the axis of the mounting spindle 1.

[0067] Preferably, the sliding connection between the stop sleeve 9 and the mounting spindle 1 is achieved as follows:

[0068] like Figure 6 and Figure 8 As shown, a positioning plane 1d is formed on the adjusting threaded section 1c of the mounting mandrel 1, and the positioning plane 1d extends along the axial direction of the mounting mandrel 1; a coaxial through hole 9b is formed on the stop sleeve 9, and a stop plane 9c that mates with the positioning plane 1d is formed on the inner wall of the through hole 9b; when the adjusting threaded section 1c of the mounting mandrel 1 passes through the through hole 9b of the stop sleeve 9, the stop plane 9c on the stop sleeve 9 fits against the positioning plane 1d on the mounting mandrel 1, thereby fixing the stop sleeve 9 and the mounting mandrel 1 in the circumferential direction to prevent relative rotation between the stop sleeve 9 and the mounting mandrel 1.

[0069] The spring 4 is sleeved on the mounting spindle 1, with one end of the spring 4 abutting against the stop cover 3 and the other end of the spring 4 abutting against the stop sleeve 9, which is used to provide clamping force for the two clamping plates 2.

[0070] The opening of the adjusting cover 5 faces the stop cover 3, the stop sleeve 9 is located inside the adjusting cover 5, and one end of the stop cover 3 is sleeved on the outside of one end of the adjusting cover 5.

[0071] Preferred, such as Figure 2 , Figure 5 and Figure 6As shown, the end of the stop sleeve 9 near the spring 4 is formed with a shoulder, and one end of the spring 4 abuts against the shoulder. The end of the stop sleeve 9 near the adjusting cover 5 is formed with a stationary toothed ring 9a, and the side of the adjusting cover 5 near the stop sleeve 9 is formed with a movable toothed ring 5a. Under the elastic force of the spring 4, the stationary toothed ring 9a and the movable toothed ring 5a mesh with each other to prevent the adjusting cover 5 from rotating relative to the mounting spindle 1 under vibration.

[0072] One end of the mounting spindle 1 is threaded to the adjusting cover 5, and a Hall element 6 is installed at the end of the mounting spindle 1 connected to the adjusting cover 5. The Hall element 6 is electrically connected to the clamping force display module 7, and a permanent magnet 8 that cooperates with the Hall element 6 is installed on the adjusting cover 5. When the adjusting cover 5 and the mounting spindle 1 rotate relative to each other, the magnetic field strength of the permanent magnet 8 acting on the Hall element 6 will change. The clamping force display module 7 can output the clamping force between the two clamping plates 2 according to the change in magnetic field strength detected by the Hall element 6.

[0073] Preferred, such as Figure 2 As shown, the permanent magnet 8 is a magnetic steel, which is fixedly installed at the end of the adjustment cover 5 away from the Hall element 6. That is, a mounting groove 5c is formed at the end of the adjustment cover 5 away from the spring 4, and the magnetic steel is fixedly installed in the mounting groove 5c of the adjustment cover 5.

[0074] In other embodiments, such as Figure 1 As shown, the permanent magnet 8 is a magnetic ring, and an mounting ring groove 5b is formed on the adjusting cover 5. An mounting groove 5c communicating with the mounting ring groove 5 is formed at the end of the adjusting cover 5 away from the spring 4. The mounting ring groove 5b is coaxial with the adjusting cover 5. The magnetic ring is housed in the mounting ring groove 5b, and a cover plate 13 for axially limiting the magnetic ring is fixedly installed in the mounting groove 5c.

[0075] An example is a sewing machine that includes the aforementioned visual thread clamp.

[0076] The working process of this visual wire clamp is as follows:

[0077] During the up-and-down movement of the adjusting cover 5, the permanent magnet 8 moves synchronously with the adjusting cover 5, while the Hall element 6 remains fixed on the mounting spindle 1. Therefore, the relative position of the permanent magnet 8 and the Hall element 6 changes, and the magnetic field around the Hall element 6 changes. The Hall element 6 converts the changing magnetic signal into an electrical signal, which is processed by the processor 7a. The processor 7a matches the displacement of the permanent magnet 8 with the electrical signal of the Hall element 6 and matches the displacement of the permanent magnet 8 with the pressure of the spring 4. The current pressure (i.e., the wire clamping force) is then displayed on the display 7b. During the process of adjusting the pressure by turning the adjusting cover 5, the display 7b can digitally display the wire clamping force at the current position in real time.

[0078] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0079] This invention's visual thread clamp can intuitively display the thread clamping force between the two clamping plates. When adjusting the thread tension, the user can clearly know how much thread clamping force they are adjusting. When encountering the same fabric again, the thread clamp can be quickly adjusted to the correct position, greatly reducing the adjustment effort and thus improving work efficiency.

[0080] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A visual wire clamp, characterized in that, The assembly includes a mounting spindle (1), a clamping plate (2), a stop cover (3), a spring (4), and an adjusting cover (5). One end of the mounting spindle (1) extends axially and passes through the clamping plate (2) and the stop cover (3) in sequence before being threadedly connected to the adjusting cover (5). The spring (4) is connected between the stop cover (3) and the adjusting cover (5). A Hall element (6) is mounted on one end of the mounting spindle (1). The Hall element (6) is electrically connected to the clamping force display module (7). A permanent magnet (8) that cooperates with the Hall element (6) is mounted on the adjusting cover (5).

2. The visual wire clamp according to claim 1, characterized in that, A stop sleeve (9) is fitted on the mounting mandrel (1). The stop sleeve (9) is located between the adjusting cover (5) and the spring (4), and the stop sleeve (9) is axially slidably connected to the mounting mandrel (1).

3. A visual wire clamp according to claim 2, characterized in that, The mounting mandrel (1) has a positioning plane (1d) extending in the axial direction, and the stop sleeve (9) has a stop plane (9c) that matches the positioning plane (1d) in the through hole (9b).

4. A visual wire clamp according to claim 3, characterized in that, The mounting mandrel (1) includes a mounting thread section (1a), a smooth shaft section (1b), and an adjusting thread section (1c) arranged sequentially along the axial direction. The clamping plate (2) and the stop cover (3) are sleeved on the smooth shaft section (1b). One end of the adjusting thread section (1c) is threadedly connected to the adjusting cover (5), and the positioning plane (1d) is formed on the adjusting thread section (1c).

5. A visual wire clamp according to claim 2, characterized in that, The stop sleeve (9) has a stationary toothed ring (9a) formed at one end near the adjusting cover (5), and the adjusting cover (5) has a moving toothed ring (5a) that meshes with the stationary toothed ring (9a) on one side near the stop sleeve (9).

6. A visual wire clamp according to claim 1, characterized in that, The mounting mandrel (1) is provided with a coaxial wire hole (1e).

7. A visual wire clamp according to claim 6, characterized in that, A Hall bracket (10) is installed at one end of the mounting spindle (1), and a mounting slot (10a) is formed at the end of the Hall bracket (10). The Hall element (6) is fixedly installed in the mounting slot (10a). A wire (11) is provided in the wire hole (1e). One end of the wire (11) is connected to the Hall element (6), and the other end of the wire (11) is connected to the clamping force display module (7).

8. A visual wire clamp according to claim 1, characterized in that, The permanent magnet (8) is a magnetic steel, which is fixedly installed on the end of the adjusting cover (5) away from the Hall element (6).

9. A visual wire clamp according to claim 1, characterized in that, The permanent magnet (8) is a magnetic ring, and the adjustment cover (5) has a mounting ring groove (5b) formed on it. The mounting ring groove (5b) is coaxial with the adjustment cover (5), and the magnetic ring is housed in the mounting ring groove (5b).

10. A visual wire clamp according to claim 1, characterized in that, The clamping force display module (7) includes a processor (7a) and a display (7b).

11. A visual wire clamp according to claim 1, characterized in that, A sponge pad (12) is fitted on the mounting mandrel (1), and the sponge pad (12) is located between the clamping piece (2) and the stop cover (3).

12. A sewing machine, characterized in that, Includes the visual wire clamp as described in any one of claims 1-11.

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