一种挑线夹线装置及缝纫机

Abstract

本实用新型公开了一种挑线夹线装置及缝纫机，涉及缝纫机技术领域，其中，挑线夹线装置，包括：张力盘组，包括至少两个且相互抵接的张力盘；夹紧组件，用于驱动所述张力盘组的所述张力盘相互抵接；平列双扭簧，包括连接体和其两端连接且旋向相反的簧圈，所述平列双扭簧的扭转方向与相邻两个所述张力盘抵接面的法线方向垂直，所述连接体内的挑线位置与相邻两个所述张力盘的抵接面共面；本挑线夹线装置及缝纫机，采用平列双扭簧设计，减少簧圈轴向形变对挑线位置的影响，避免挑线位置带动缝纫线沿簧圈轴向滑动或两者之间出现悬空，进而保证挑线杆和 / 或机针位置的进线量准确。

Claims

1. A thread take-up and thread clamping device for controlling the sewing thread on the upstream side of the thread take-up lever in a sewing machine, characterized in that, include: Tensioner assembly (2), comprising at least two tensioners that abut against each other; Clamping assembly (4) is used to drive the tension discs of the tension disc assembly (2) to abut against each other; The parallel double torsion spring (3) includes a connecting body (32) and spring coils (31) connected at both ends of the connecting body (32) and rotating in opposite directions. The torsion direction of the parallel double torsion spring (3) is perpendicular to the normal direction of the contact surface of the two adjacent tension discs. The position of the thread pick in the connecting body (32) is coplanar with the contact surface of the two adjacent tension discs.

2. The thread take-up clamp of claim 1, wherein The ratio of the torque to the axial deformation of the spring coils (31) at both ends of the connector (32) is not equal. The ratio of the torque to the axial deformation of the spring coil (31) closer to the line take-up rod is greater than that of the spring coil (31) at the other end.

3. The thread take-up clip device of claim 1, wherein The number of coils of the spring coils (31) at both ends of the connector (32) is different, with the number of coils of the spring coils (31) at the end closer to the line take-up lever being greater than the number of coils of the spring coils (31) at the other end.

4. The thread take-up clip device of claim 1, wherein It also includes a tension column (1) and a fixing component (5); The fixing component (5), the tension disc assembly (2) and the clamping component (4) are coaxially sleeved on the outside of the tension column (1) in sequence, and the two ends of the tension disc assembly (2) abut against the movable end of the clamping component (4) and the fixing component (5) respectively. The fixed end of the clamping assembly (4) and the fixing assembly (5) are both fixedly connected to the tension column (1).

5. The thread take-up clamp of claim 4, wherein, The movable end of the clamping assembly (4) includes a pressure tube (41), and the fixed end of the clamping assembly (4) includes a cap (44). The pressure tube (41) is closed at one end near the tension disc assembly (2) and is used to abut against the end face of the tension disc assembly (2); The cap (44) is connected to the tension column (1) by threads; An elastic element (42) is provided between the pressure tube (41) and the cap (44) for driving the pressure tube (41) away from the cap (44), and the elastic element (42) is sleeved inside the pressure tube (41).

6. The thread take-up clamp of claim 5, wherein A gasket (43) is provided between the cap (44) and the end of the elastic member (42), and the gasket (43) is slidably mounted coaxially with the tension column (1); The gasket (43) and the cap (44) are provided with interlocking check teeth.

7. The thread take-up clip device of claim 5 wherein, The movable end of the clamping assembly (4) also includes a retainer (46); The retainer (46) and / or the pressure tube (41) are slidably mounted coaxially with the tension column (1), and the two ends of the retainer (46) abut against the movable ends of the tension disc assembly (2) and the clamping assembly (4), respectively.

8. The thread take-up clip device of claim 4, wherein One end of the tension column (1) is provided with a through opening groove along the axial direction, and the movable end of the clamping assembly (4) is slidably installed with the opening groove; The other end of the tension column (1) is provided with a through hole that guides the opening groove along the axial direction. A tension release pin (6) is slidably disposed in the through hole. When the tension release pin (6) is driven to move along the axial direction, it can abut against the movable end of the clamping assembly (4) and drive the movable end of the clamping assembly (4) to release its abutment against the tension disc assembly (2).

9. The thread take-up clamp of claim 8, wherein, Both the movable end of the clamping assembly (4) and the peripheral wall of the fixing assembly (5) are provided with through grooves for the connecting body (32) to pass through and move.

10. A sewing machine characterized by comprising: It includes a line-lifting lever and a line-lifting clamping device as described in any one of claims 1-9.

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