Sewing machine device

Abstract

This invention provides a sewing machine device that simplifies the structure, reduces the number of parts, decreases assembly volume, and reduces operating noise, thereby lowering costs and saving energy. The sewing machine device includes a machine body, a drive motor, a pressing cam, a feed adjustment mechanism, a thread-cutting and loosening mechanism, and a thread-cutting pressing structure. The feed adjustment mechanism rotates when the pressing cam is driven to rotate by the drive motor. The thread-cutting pressing structure presses the thread-cutting and loosening mechanism when the pressing cam is driven to rotate by the drive motor. When the pressing cam rotates to a position within the feed range driven by the drive motor, the feed adjustment mechanism adjusts the feed by rotating the pressing cam. When the pressing cam rotates to a position within the tangent range driven by the drive motor, the thread-cutting and loosening mechanism presses the thread-cutting pressing structure by rotating the pressing cam, performing either a thread-cutting or thread-loosening action.

Description

Technical Field

[0001] This invention relates to the field of sewing machines, and in particular to a sewing machine device. Background Technology

[0002] In existing technology, sewing machine devices include a feed adjustment mechanism for adjusting the feed amount. This mechanism typically includes a mechanical feed knob and a feed adjustment body, and the feed amount is adjusted by changing the feed angle of the feed adjustment body. Furthermore, existing sewing machine devices can automatically reverse stitch by pulling a connecting rod via a reverse feed solenoid. Additionally, existing sewing machine devices can automatically cut the thread and release the thread by pulling a connecting rod via a solenoid, which in turn drives a cam-driven thread-cutting and thread-releasing arm. In these sewing machine devices, automatic thread cutting and loosening, as well as automatic reverse stitching, are typically achieved through two drive sources (e.g., actuators), while feed amount adjustment is done manually. The sewing machine device has a complex structure (many parts), resulting in a large assembly volume and loud operating noise. Therefore, it is necessary to improve the structure of the sewing machine device to simplify the structure, reduce the number of parts, reduce the assembly volume, and lower the operating noise. Summary of the Invention

[0003] This invention provides a sewing machine device that simplifies the structure, reduces the number of parts, reduces the assembly volume, and lowers the operating noise, thereby reducing costs and saving energy.

[0004] This invention provides a sewing machine device, comprising: a machine body; a drive motor mounted on the machine body via a mounting plate; a pressing cam mounted on the motor shaft of the drive motor; a feed adjustment mechanism connected to the pressing cam, and rotating by the rotation of the pressing cam when driven by the drive motor; a thread-cutting and loosening mechanism mounted on one side of the drive motor; and a thread-cutting and pressing structure mounted between the pressing cam and the thread-cutting and loosening mechanism, and pressing the thread-cutting and loosening mechanism by the rotation of the pressing cam when driven by the drive motor. When the pressing cam rotates to a rotation angle within the feed range driven by the drive motor, the feed adjustment mechanism performs a feed adjustment action driven by the rotation of the pressing cam. When the pressing cam rotates to a rotation angle within the thread-cutting range driven by the drive motor, the thread-cutting and loosening mechanism performs a thread-cutting or thread-loosening action by pressing the thread-cutting and pressing structure by the rotation of the pressing cam.

[0005] In an embodiment of the present invention, the feed adjustment mechanism includes: a feed adjustment body for adjusting the feed of the sewing thread; a feed adjustment wrist disposed on the feed adjustment body; and a feed adjustment rod connected to the feed adjustment wrist, wherein the feed adjustment rod is connected to the pressing cam via an adjustment fulcrum shaft, and the feed adjustment wrist and the feed adjustment body are driven by the rotation of the pressing cam, thereby causing the feed adjustment body to rotate and adjust the feed amount.

[0006] In an embodiment of the present invention, the tangential pressing structure includes: a tangential pressing arm, which is disposed outside the drive motor via a fulcrum shaft and is rotatable about the fulcrum shaft; a pressing roller, disposed at one end of the tangential pressing arm and corresponding to the pressing cam; and a pressing block, disposed at the other end of the tangential pressing arm and corresponding to the tangential loosening mechanism. When the pressing cam rotates under the drive of the drive motor, the pressing cam presses the pressing roller, causing the tangential pressing arm to rotate about the fulcrum shaft, and the pressing block presses the tangential loosening mechanism to perform the tangential action or the loosening action.

[0007] In an embodiment of the present invention, the tangent wire loosening mechanism includes: a tangent shaft and a loosening shaft, disposed on the mounting plate; a tangent rocker arm and a tangent drive arm, disposed on the tangent shaft; and a loosening arm, disposed on the loosening shaft. The tangential rocker arm has a first protrusion and a first recess, the tangential drive arm has a second recess, and the loosening arm has a second protrusion. The first protrusion of the tangential rocker arm is embedded in the second recess of the tangential drive arm, so that the tangential rocker arm and the tangential drive arm can rotate synchronously along the tangential axis. The second protrusion of the loosening arm is embedded in the first recess of the tangential rocker arm, so that the loosening arm and the tangential rocker arm can move up and down or rotate synchronously. When the pressing cam rotates under the drive of the drive motor, the pressing cam presses the tangential pressing structure, causing the tangential pressing structure to rotate and press the tangential rocker arm. The tangential rocker arm and the loosening arm move downward synchronously and begin the tangential action or the loosening action.

[0008] In an embodiment of the present invention, the tangential loosening mechanism further includes: a lower shaft disposed on one side of the tangential drive arm; a tangential cam disposed on the lower shaft and having a tangential curved surface; and a tangential drive rod disposed on the tangential drive arm, wherein a tangential roller is provided on the first protrusion of the tangential rocker arm, the tangential roller of the tangential rocker arm extends through the first protrusion into the second recess of the tangential drive arm and protrudes into the tangential curved surface. When the pressing cam rotates and the tangential rocker arm is pressed by the tangential pressing structure, the tangential roller of the tangential rocker arm is embedded in the tangential curved surface and moves downward to a set position, then slides along the tangential curved surface, causing the tangential rocker arm to rotate along the tangential axis, and the tangential rocker arm drives the tangential drive arm to rotate synchronously, thereby the tangential drive arm drives the tangential drive rod to perform the tangential action.

[0009] In an embodiment of the present invention, the tangential loosening mechanism further includes: a thread component fixed to the loosening arm; a loosening plate connected to the thread component; a pressing rod abutting against the loosening plate; and a lifting plate connected to the pressing rod. When the pressing cam rotates and presses the tangential rocking arm through the tangential pressing structure, the loosening arm, which moves up and down synchronously with the tangential rocking arm, is pressed and pulls the thread component, causing the thread component to pull the loosening plate. The pulled loosening plate drives the pressing rod to press the lifting plate, thereby the lifting plate presses the loosening device to start the loosening action.

[0010] In an embodiment of the present invention, the loosening arm is provided with a loosening roller, the tangential cam has a loosening curved surface, and the loosening roller of the loosening arm protrudes into the loosening curved surface. When the pressing cam rotates and presses the tangential rocker arm through the tangential pressing structure, the tangential rocker arm drives the loosening arm to move downward synchronously. The loosening roller of the loosening arm is embedded in the loosening curved surface and moves downward to the set position, then slides along the loosening curved surface, causing the loosening arm to rotate along the loosening axis, and the loosening arm pulls the thread component to perform the loosening action.

[0011] In an embodiment of the present invention, the start points of the tangential action and the loosening action are set by the shapes of the tangential surface and the loosening surface of the tangential cam.

[0012] In an embodiment of the present invention, when the pressing cam is rotated by the drive motor to the point where the rotation angle is within the feed range, the tangential pressing structure does not operate.

[0013] In an embodiment of the present invention, after the tangential action is completed, the pressing cam rotates in the opposite direction to return to the original feed amount.

[0014] Based on the above, in the sewing machine apparatus of the present invention, the feed adjustment mechanism performs feed adjustment by rotating the pressing cam, and the thread cutting and loosening mechanism performs thread cutting or loosening by rotating the pressing cam and pressing the thread cutting pressing structure. Thus, the sewing machine apparatus can achieve the feed adjustment action performed by the feed adjustment mechanism using a single drive motor and the pressing cam, and achieve the thread cutting or loosening action performed by the thread cutting and loosening mechanism using a single drive motor and the pressing cam and thread cutting pressing structure. Accordingly, the sewing machine apparatus of the present invention achieves simplified structure, reduced number of parts, reduced assembly volume, and reduced operating noise, thereby reducing costs and saving energy.

[0015] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a partial structural schematic diagram of the sewing machine device according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A schematic diagram of a partial structure of the sewing machine device near the feed adjustment mechanism;

[0018] Figure 3 yes Figure 1 A schematic diagram of a partial structure of the sewing machine device near the thread-cutting and loosening mechanism and the thread-cutting and pressing structure;

[0019] Figure 4 is Figure 3 A partially enlarged schematic diagram of the sewing machine assembly near the thread tweezers and unwinding mechanism;

[0020] Figure 5 yes Figure 3 A partially enlarged schematic diagram of the sewing machine device shown, near the thread-cutting and loosening mechanism and the thread-cutting and pressing structure;

[0021] Figure 6 yes Figure 3 A schematic diagram of a partial structure of the sewing machine device near the thread tangling and loosening mechanism;

[0022] Figure 7 and Figure 8 yes Figure 3 The diagram shows enlarged views of different parts of the sewing machine device near the thread-cutting and loosening mechanism and the thread-cutting and pressing structure.

[0023] Explanation of reference numerals in the attached figures

[0024] 100: Sewing machine assembly;

[0025] 110: Body;

[0026] 120: Drive motor;

[0027] 122: Mounting plate;

[0028] 124: Motor shaft;

[0029] 126: Installation components;

[0030] 130: Press the cam;

[0031] 140: Feed adjustment mechanism;

[0032] 142: Feed regulator;

[0033] 144: Feed adjustment wrist;

[0034] 146: Feed adjusting rod;

[0035] 146a: Adjusting fulcrum shaft;

[0036] 150: Wire loosening mechanism;

[0037] 1510: Tangent pivot;

[0038] 1512: Loosening spool;

[0039] 1514: Tangential rocker arm;

[0040] 1514a: first convex part;

[0041] 1514b: first recess;

[0042] 1514c: Tangent roller;

[0043] 1516: Tangential drive arm;

[0044] 1516a: Second recess;

[0045] 1518: Loosen the arm;

[0046] 1518a: second convex part;

[0047] 1518b: Loosening roller;

[0048] 1520: Line component;

[0049] 1520a: Front-end;

[0050] 1520b: Backend;

[0051] 1522: Loose thread board;

[0052] 1524: Press lever;

[0053] 1526: lifting plate;

[0054] 1528: Bolt;

[0055] 1530: Lower shaft;

[0056] 1532: Tangential cam;

[0057] 1532a: Tangent surface;

[0058] 1532b: Loose-line surface;

[0059] 1534: Tangential drive rod;

[0060] 160: Tangential pressing structure;

[0061] 162: Tangential pressing arm;

[0062] 162a: Pivot axis;

[0063] 164: Press the roller;

[0064] 166: Press block;

[0065] 170: Wire loosener. Detailed Implementation

[0066] The present invention will now be described in detail with reference to exemplary embodiments thereof, examples of which are illustrated in the accompanying drawings. Wherein, Figure 1 This is a partial structural schematic diagram of the sewing machine device according to an embodiment of the present invention. Figure 2 yes Figure 1 The diagram shows a partial structural layout of the sewing machine assembly near the feed adjustment mechanism. Figure 3 yes Figure 1 The diagram shows a partial structural schematic of the sewing machine device near the thread-cutting and thread-pressing mechanism. Figure 4 is... Figure 3 The diagram shown is a partial enlarged view of the sewing machine assembly near the thread tweezers and unwinding mechanism. Figure 5 yes Figure 3 The diagram shows a partial enlarged view of the sewing machine assembly near the thread-cutting and releasing mechanism and the thread-cutting and pressing structure. Figure 6 yes Figure 3 The diagram shows a partial structural representation of the sewing machine assembly near the thread tangling and unwinding mechanism. Figure 7 and Figure 8 yes Figure 3 The diagram shows enlarged views of different parts of the sewing machine assembly near the thread-cutting and releasing mechanism and the thread-cutting and pressing structure. The following will use… Figures 1 to 8 This invention is intended to illustrate the specific structure and operation process of the sewing machine device 100 in this embodiment, but this is only one example and is not intended to limit the invention. It can be adjusted according to requirements.

[0067] Please refer to Figures 1 to 3 In this embodiment, the sewing machine device 100 includes a body 110, a drive motor 120, a pressing cam 130, a feed adjustment mechanism 140, a thread-cutting and loosening mechanism 150, and a thread-cutting and pressing structure 160. The drive motor 120 is mounted on the body 110 via a mounting plate 122. The pressing cam 130 is mounted on the motor shaft 124 of the drive motor 120. The feed adjustment mechanism 140 is connected to the pressing cam 130 and rotates due to the rotation of the pressing cam 130 when the drive motor 120 drives the pressing cam 130 to rotate. The thread-cutting and loosening mechanism 150 is located on one side of the drive motor 120. The thread-cutting and pressing structure 160 is located between the pressing cam 130 and the thread-cutting and loosening mechanism 150, and presses the thread-cutting and loosening mechanism 150 due to the rotation of the pressing cam 130 when the drive motor 120 drives the pressing cam 130 to rotate. Furthermore, when the pressing cam 130 is rotated by the drive motor 120 to a rotation angle within the feed range, the feed adjustment mechanism 140 performs a feed adjustment action driven by the rotation of the pressing cam 130. When the pressing cam 130 is rotated by the drive motor 120 to a rotation angle within the tangent range, the tangent loosening mechanism 150 performs a tangent action or a loosening action by pressing the tangent pressing structure 160 through the rotation of the pressing cam 130.

[0068] Specifically, in this embodiment, as Figures 1 to 3 As shown, the body 110 is, for example, a bracket for mounting other structures, and the outer casing is omitted here. The drive motor 120 is mounted on the mounting plate 122 via a mounting piece 126 on the motor housing, and thus is mounted on the body 110 via the mounting plate 122. The pressing cam 130 is fixed to the motor shaft 124 of the drive motor 120, so that the pressing cam 130 rotates synchronously with the motor shaft 124. Furthermore, both the feed adjustment mechanism 140 and the tangent wire loosening mechanism 150 are driven by the drive motor 120 and the pressing cam 130. One side of the feed adjustment mechanism 140 is directly connected to the pressing cam 130, so that when the drive motor 120 drives the pressing cam 130 to rotate, the feed adjustment mechanism 140 can also perform feed adjustment actions driven by the rotation of the pressing cam 130. In contrast, one side of the tangent wire loosening mechanism 150 is indirectly connected to the pressing cam 130 through the tangent pressing structure 160. Thus, when the drive motor 120 drives the pressing cam 130 to rotate, the tangent wire loosening mechanism 150 can also perform tangent or loosening actions by rotating the pressing cam 130 and pressing the tangent pressing structure 160.

[0069] With the above configuration, in the sewing machine device 100 of this embodiment, the feed adjustment mechanism 140 performs feed adjustment action driven by the rotation of the pressing cam 130, and the thread cutting and loosening mechanism 150 performs thread cutting or thread loosening action driven by the rotation of the pressing cam 130 and the pressing of the thread cutting pressing structure 160. Thus, the sewing machine device 100 can realize the feed adjustment action performed by the feed adjustment mechanism 140 through a single drive motor 120 and the pressing cam 130, and realize the thread cutting or loosening action performed by the thread cutting and loosening mechanism 150 through a single drive motor 120, the pressing cam 130, and the thread cutting pressing structure 160. That is, the sewing machine device 100 realizes the feed adjustment action of the feed adjustment mechanism 140 and the thread cutting or loosening action of the thread cutting and loosening mechanism 150 through the drive of the single drive motor 120 and the rotation of the pressing cam 130 at different angles (i.e., the feed range or the thread cutting range). Accordingly, the sewing machine device 100 can achieve structural simplification, reduce the number of parts, reduce assembly volume and reduce operating noise, thereby reducing costs and saving energy.

[0070] Furthermore, in this embodiment, as Figure 2 As shown, the feed adjustment mechanism 140 includes a feed adjustment body 142, a feed adjustment wrist 144, and a feed adjustment rod 146. The feed adjustment body 142 is used to adjust the feed of the sewing thread. The feed adjustment wrist 144 is disposed on the feed adjustment body 142. The feed adjustment rod 146 is connected to the feed adjustment wrist 144. The feed adjustment rod 146 is connected to the pressing cam 130 through the adjusting pivot shaft 146a, and the rotation of the pressing cam 130 drives the feed adjustment wrist 144 and the feed adjustment body 142, causing the feed adjustment body 142 to rotate and adjust the feed amount. Here, by setting the dimensions (e.g., length) and connection angle of the feed adjustment wrist 144 and the feed adjustment rod 146, the feed adjustment mechanism 140 can be restricted to a certain range of the rotation angle of the motor shaft 124 of the drive motor 120 (equivalent to the rotation angle of the pressing cam 130) (e.g., the aforementioned feed range). As an example, the feed range of the rotation angle is, for example, between 0 degrees and 110 degrees. However, the present invention does not limit the specific structure, arrangement, and location (e.g., the actual rotation angle of the feed range) of the feed adjustment mechanism 140, which can be adjusted as needed.

[0071] Therefore, in this embodiment, as Figure 3 and Figure 4As shown, the wire loosening mechanism 150 includes a wire loosening shaft 1510 and a wire tangent shaft 1512, a wire tangent rocker arm 1514 and a wire tangent drive arm 1516, and a wire loosening arm 1518. The wire loosening shaft 1510 and the wire loosening shaft 1512 are mounted on the mounting plate 122. The wire tangent rocker arm 1514 and the wire tangent drive arm 1516 are mounted on the wire loosening shaft 1510. The wire loosening arm 1518 is mounted on the wire loosening shaft 1512. The wire tangent rocker arm 1514 has a first protrusion 1514a and a first recess 1514b, the wire tangent drive arm 1516 has a second recess 1516a, and the wire loosening arm 1518 has a second protrusion 1518a. The first protrusion 1514a of the tangent rocker arm 1514 is embedded in the second recess 1516a of the tangent drive arm 1516, so that the tangent rocker arm 1514 and the tangent drive arm 1516 can rotate synchronously along the tangent axis 1510. The second protrusion 1518a of the loosening arm 1518 is embedded in the first recess 1514b of the tangent rocker arm 1514, so that the loosening arm 1518 and the tangent rocker arm 1514 can move up and down or rotate synchronously. Thus, as Figure 3 and Figure 5 As shown, the pressing cam 130 rotates under the drive of the drive motor 120 (e.g., in...). Figure 5 In the case of counterclockwise rotation, pressing cam 130 presses tangential pressing structure 160, causing tangential pressing structure 160 to rotate (e.g., in the case of counterclockwise rotation). Figure 5 (The counterclockwise rotation) presses the tangent rocker arm 1514, and the tangent rocker arm 1514 and the loosening arm 1518 move downwards simultaneously and begin the tangent or loosening action.

[0072] Additionally, in this embodiment, as Figure 3 and Figure 5 As shown, the tangential pressing structure 160 includes a tangential pressing arm 162, a pressing roller 164, and a pressing block 166. The tangential pressing arm 162 is disposed on the outside of the drive motor 120 (e.g., on the side of the mounting member 126) via a fulcrum shaft 162a, and is rotatable about the fulcrum shaft 162a. The pressing roller 164 is disposed at one end of the tangential pressing arm 162 and corresponds to the pressing cam 130. The pressing block 166 is disposed at the other end of the tangential pressing arm 162 and corresponds to the tangential loosening mechanism 150 (e.g., corresponding to the tangential rocker arm 1514). Thus, as... Figure 5 As shown, the pressing cam 130 rotates under the drive of the drive motor 120 (e.g., in...). Figure 5 In the case of counterclockwise rotation, pressing cam 130 presses pressing roller 164, causing tangential pressing arm 162 to rotate about fulcrum axis 162a (e.g., in the case of counterclockwise rotation). Figure 5The pressing block 166 presses the tangent wire loosening mechanism (e.g., the tangent rocker arm 1514) to perform a tangent or loosening action. Here, by setting the dimensions (e.g., length) and connection angle of the aforementioned components of the tangent pressing structure 160 and the tangent loosening mechanism 150, the tangent or loosening action of the tangent loosening mechanism 150 can be limited to a certain range (e.g., the aforementioned tangent range) of the rotation angle of the motor shaft 124 of the drive motor 120 (corresponding to the rotation angle of the pressing cam 130). As an example, the tangent range of the rotation angle is, for example, between 110 degrees and 190 degrees. However, the present invention does not limit the specific structure, arrangement, and position (e.g., the actual rotation angle of the tangent range) of the tangent loosening mechanism 150 and the tangent pressing structure 160, which can be adjusted as needed.

[0073] Furthermore, in this embodiment, as Figure 3 and Figure 6 As shown, the wire loosening mechanism 150 also includes a wire component 1520, a loosening plate 1522, a pressing rod 1524, and a lifting plate 1526. The wire component 1520 is fixed to the loosening arm 1518 (e.g., by bolts 1528). The loosening plate 1522 connects to the wire component 1520. The pressing rod 1524 abuts against the loosening plate 1522. The lifting plate 1526 connects to the pressing rod 1524. That is, the wire component 1520, the loosening plate 1522, the pressing rod 1524, and the lifting plate 1526 constitute a linkage mechanism. As an example, the wire component 1520, the wire release plate 1522, the pressing rod 1524, and the lifting plate 1526 are arranged on the opposite side to the wire release shaft 1510 and the wire release shaft 1512, the wire release rocker arm 1514 and the wire release drive arm 1516, and the wire release arm 1518. For example, the front end 1520a of the wire component 1520 is connected to the wire release arm 1518 (e.g., Figure 3 As shown), and the rear end 1520b of the wire component 1520 is connected to the loose wire plate 1522 (as shown). Figure 6 (As shown), but not limited thereto. Thus, when the pressing cam 130 rotates and the tangential pressing structure 160 (e.g., via the pressing block 166) presses the tangential rocker arm 1514, the slack arm 1518, which moves up and down synchronously with the tangential rocker arm 1514, is pressed and pulls the thread component 1520, causing the thread component 1520 to pull the slack plate 1522. The pulled slack plate 1522 pushes the pressing rod 1524 to press the lifting plate 1526 (e.g., as shown). Figure 6 (As indicated by the arrow), thus the lifting plate 1526 presses the wire releaser 170 to begin the wire release action.

[0074] Furthermore, in this embodiment, such as Figure 3 , Figure 7 and Figure 8As shown, the tangent wire loosening mechanism 150 also includes a lower shaft 1530, a tangent cam 1532, and a tangent drive rod 1534. The lower shaft 1530 is disposed on one side of the tangent drive arm 1516. The tangent cam 1532 is disposed on the lower shaft 1530 and has a tangent curved surface 1532a. The tangent drive rod 1534 is disposed on the tangent drive arm 1516. A tangent roller 1514c is provided on the first protrusion 1514a of the tangent rocker arm 1514, and the tangent roller 1514c of the tangent rocker arm 1514 extends into the second recess 1516a of the tangent drive arm 1516 through the first protrusion 1514a (in...). Figure 7 The text is omitted from the translation. Figure 3 (As shown in the figure) and protrudes towards the tangential surface 1532a. As an example, the tangential surface 1532a may be a curved groove formed on the outer peripheral surface of the tangential cam 1532, but is not limited thereto. Thus, when the pressing cam 130 rotates and the tangential rocker arm 1514 is pressed by the tangential pressing structure 160 (e.g., by the pressing block 166), the tangential roller 1514c of the tangential rocker arm 1514 engages with the tangential surface 1532a and slides along the tangential surface 1532a after moving downward to a set position (as shown in the figure). Figure 7 and Figure 8 As shown), the tangent rocker arm 1514 rotates along the tangent axis 1510 (as shown). Figure 8 As shown by the arrow), the tangent rocker arm 1514 drives the tangent drive arm 1516 to rotate synchronously, thereby driving the tangent drive arm 1516 to drive the tangent drive rod 1534 to perform a tangent action. During this process, the tangent surface 1532a is pushed by the tangent roller 1514c, causing the tangent cam 1532 to rotate along the lower shaft 1530 (as shown by the arrow). Figure 7 (As indicated by the arrow).

[0075] Therefore, in this embodiment, as Figure 7 and Figure 8 As shown, the loosening arm 1518 is provided with a loosening roller 1518b, and the tangential cam 1532 has a loosening curved surface 1532b. The loosening roller 1518b of the loosening arm 1518 protrudes into the loosening curved surface 1532b. As an example, the loosening curved surface 1532b may be a curved groove formed on the outer peripheral surface of the tangential cam 1532, and is set at a predetermined distance from the tangential curved surface 1532a, but this is not a limitation. Thus, when the pressing cam 130 rotates and the tangential pressing structure 160 (e.g., by pressing block 166) presses the tangential rocker arm 1514, the tangential rocker arm 1514 drives the loosening arm 1518 to move downwards synchronously. The loosening roller 1518b of the loosening arm 1518 embeds into the loosening curved surface 1532b and slides along the loosening curved surface 1532b after moving downwards to a set position (e.g., ...). Figure 7 and Figure 8As shown), the slack arm 1518 rotates along the slack shaft 1512 (as shown). Figure 8 As indicated by the arrow), the slack arm 1518 pulls the wire assembly 1520 to perform the slack operation. During this process, the slack surface 1532b is pushed by the slack roller 1518b, causing the tangent cam 1532 to rotate along the lower shaft 1530 (as shown by the arrow). Figure 7 (As indicated by the arrow). However, the present invention does not limit the specific structure, arrangement, and location of the tangential wire loosening mechanism 150, which can be adjusted according to requirements.

[0076] Furthermore, in this embodiment, such as Figure 3 , Figure 7 and Figure 8 As shown, the aforementioned feed adjustment action, line action, and line release action are performed separately and sequentially. Specifically, when the pressing cam 130 is rotated by the drive motor 120 to a rotation angle within the feed range (e.g., between 0 and 110 degrees), the feed adjustment mechanism 140 is driven by the drive motor 120 and the pressing cam 130, but the tangential pressing structure 160 does not operate (for example, the pressing cam 130 is designed so that it does not contact the tangential pressing structure 160 when it rotates to a rotation angle within the feed range). When the pressing cam 130 is rotated by the drive motor 120 to a rotation angle within the tangential range (e.g., between 110 and 190 degrees), the tangential pressing structure 160 is driven by the drive motor 120 and the pressing cam 130 to press the tangential loosening mechanism 150, causing the tangential loosening mechanism 150 to begin tangential and loosening actions.

[0077] Furthermore, in this embodiment, as Figure 7 and Figure 8As shown, the start points of the tangenting action and the loosening action are set by the shapes of the tangent surface 1532a and the loosening surface 1532b of the tangent cam 1532. Specifically, when the pressing cam 130 rotates and presses the tangent rocker arm 1514 via the tangent pressing structure 160 (e.g., via the pressing block 166), the tangent drive arm 1516 and the loosening arm 1518, which are linked to the tangent rocker arm 1514, are also pressed and move downwards. The tangent rocker arm 1514 and the tangent drive arm 1516 move on the tangent surface 1532a via the tangent roller 1514c, converting the downward movement of the tangent rocker arm 1514 along the tangent axis 1510 into rotation along the tangent axis 1510 to perform the tangenting action (details as described above). Furthermore, the slack line arm 1518 moves on the slack line surface 1532b via the slack line roller 1518b, converting the downward movement of the slack line arm 1518 along the slack line axis 1512 into rotation along the slack line axis 1512 to perform the slack line action (details as described above). Thus, through the shape design of the tangent surface 1532a and the slack line surface 1532b, the timing and movement path of the tangent roller 1514c of the tangent rocker arm 1514 engaging the tangent surface 1532a (determined by the curvature and path length of the tangent surface 1532a) are different from the timing and movement path of the slack line roller 1518b of the slack line arm 1518 engaging the slack line surface 1532b (determined by the curvature and path length of the slack line surface 1532b), thereby separating the tangent line action and the slack line action and performing them sequentially. Furthermore, after the tangential action is completed, the pressing cam 130 rotates in the opposite direction to return to the original feed amount. This allows for easy adjustment of the feed for the next operation. However, the present invention does not limit the operation of the tangential unwinding mechanism 150, which can be adjusted as needed.

[0078] In summary, in the sewing machine apparatus of the present invention, the feed adjustment mechanism performs feed adjustment by rotating the pressing cam, and the thread cutting and loosening mechanism performs thread cutting or loosening by rotating the pressing cam and pressing the thread cutting pressing structure. Thus, the sewing machine apparatus can achieve the feed adjustment action performed by the feed adjustment mechanism using a single drive motor and the pressing cam, and achieve the thread cutting or loosening action performed by the thread cutting and loosening mechanism using a single drive motor and the pressing cam and the thread cutting pressing structure. Preferably, when the pressing cam is driven by the drive motor for feeding, the thread cutting pressing structure does not operate; after the thread cutting action is completed, the pressing cam rotates in the opposite direction to return to the original feed amount, thereby making the operation of the sewing machine apparatus easier. Accordingly, the sewing machine apparatus of the present invention achieves simplified structure, reduced number of parts, reduced assembly volume, and reduced operating noise, thereby reducing costs and saving energy.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sewing machine device, characterized in that, include: Organism; The drive motor is mounted on the machine body via a mounting plate; A pressing cam is mounted on the motor shaft of the drive motor; The feed adjustment mechanism is connected to the pressing cam, and rotates by means of the rotation of the pressing cam when the drive motor drives the pressing cam to rotate; A wire tangent and loosening mechanism is disposed on one side of the drive motor; and A tangential pressing structure is disposed between the pressing cam and the tangential loosening mechanism. When the pressing cam is driven to rotate by the drive motor, the rotation of the pressing cam presses the tangential loosening mechanism. When the pressing cam rotates to a position within the feed range driven by the drive motor, the feed adjustment mechanism adjusts the feed by rotating the pressing cam. When the pressing cam is rotated by the drive motor to a rotation angle within the tangential range, the tangential loosening mechanism performs a tangential action or a loosening action by pressing the tangential pressing structure through the rotation of the pressing cam.

2. The sewing machine apparatus according to claim 1, characterized in that, The feed adjustment mechanism includes: Feed adjuster, used to adjust the feed of the sewing thread; A feed adjustment wrist is disposed on the feed adjustment body; and The feed adjusting rod is connected to the feed adjusting wrist, wherein The feed adjustment rod is connected to the pressing cam via an adjustment pivot shaft, and the rotation of the pressing cam drives the feed adjustment wrist and the feed adjustment body, thereby rotating the feed adjustment body to adjust the feed amount.

3. The sewing machine apparatus according to claim 1, characterized in that, The tangential pressing structure includes: The tangential pressing arm is set on the outside of the drive motor via a fulcrum shaft and can rotate around the fulcrum shaft. A pressing roller, disposed at one end of the tangential pressing arm and corresponding to the pressing cam; and A pressing block is disposed at the other end of the tangential pressing arm and corresponds to the tangential loosening mechanism. When the pressing cam rotates under the drive of the drive motor, the pressing cam presses the pressing roller, causing the tangential pressing arm to rotate around the fulcrum axis, and the pressing block presses the tangential loosening mechanism to perform the tangential action or the loosening action.

4. The sewing machine apparatus according to claim 1, characterized in that, The tangential wire loosening mechanism includes: The tangent spindle and the unwinding spindle are mounted on the mounting plate. A tangent rocker arm and a tangent drive arm are mounted on the tangent shaft; and A wire release arm is mounted on the wire release shaft, wherein... The tangential rocker arm is provided with a first protrusion and a first recess. The tangential drive arm is provided with a second recess. The loosening arm is provided with a second protrusion. The first protrusion of the tangent rocker arm is embedded in the second recess of the tangent drive arm, so that the tangent rocker arm and the tangent drive arm can rotate synchronously along the tangent axis. The second protrusion of the loosening arm is embedded in the first recess of the tangential rocker arm, so that the loosening arm and the tangential rocker arm can move up and down or rotate synchronously. When the pressing cam is rotated by the drive motor, the pressing cam presses the tangential pressing structure, causing the tangential pressing structure to rotate and press the tangential rocker arm. The tangential rocker arm and the loosening arm move downwards synchronously and begin the tangential action or the loosening action.

5. The sewing machine apparatus according to claim 4, characterized in that, The tangential wire loosening mechanism further includes: The lower shaft is located on one side of the tangential drive arm; A tangential cam, disposed on the lower shaft, and having a tangential surface; and A tangent drive rod is disposed on the tangent drive arm, wherein The first protrusion of the tangential rocker arm is provided with a tangential roller. The tangential roller of the tangential rocker arm extends into the second recess of the tangential drive arm through the first protrusion and protrudes into the tangential curved surface. When the pressing cam rotates and presses the tangential rocker arm through the tangential pressing structure, the tangential roller of the tangential rocker arm is embedded in the tangential curved surface and moves downward to a set position, then slides along the tangential curved surface, causing the tangential rocker arm to rotate along the tangential axis. The tangential rocker arm drives the tangential drive arm to rotate synchronously, thereby the tangential drive arm drives the tangential drive rod to perform the tangential action.

6. The sewing machine apparatus according to claim 5, characterized in that, The tangential wire loosening mechanism further includes: The wire component is fixed to the loose wire arm; Loosen the wire plate and connect the wire component; The pressing rod abuts against the loosening plate; and The lifting plate is connected to the pressing rod, and When the pressing cam rotates and presses the tangential rocker arm through the tangential pressing structure, the loosening arm, which moves up and down synchronously with the tangential rocker arm, is pressed and pulls the thread component, causing the thread component to pull the loosening plate. The pulled loosening plate drives the pressing rod to press the lifting plate, thereby the lifting plate presses the loosening device and begins the loosening action.

7. The sewing machine apparatus according to claim 6, characterized in that, The slack arm is equipped with slack rollers. The tangential cam has a loose curved surface. The unloading roller of the unloading arm protrudes toward the unloading curved surface. When the pressing cam rotates and presses the tangential rocker arm through the tangential pressing structure, the tangential rocker arm drives the loosening arm to move downwards synchronously. The loosening roller of the loosening arm is embedded in the loosening surface and moves downwards to the set position, then slides along the loosening surface, causing the loosening arm to rotate along the loosening axis. The loosening arm pulls the thread component to perform the loosening action.

8. The sewing machine apparatus according to claim 7, characterized in that, The start points of the tangential action and the loosening action are set by the shapes of the tangential surface and the loosening surface of the tangential cam.

9. The sewing machine apparatus according to any one of claims 1 to 8, characterized in that, When the pressing cam is rotated by the drive motor to the point where the rotation angle is within the feed range, the tangential pressing structure does not operate.

10. The sewing machine apparatus according to any one of claims 1 to 8, characterized in that, After the tangential action is completed, the pressing cam rotates in the opposite direction to return to the original feed amount.

Images