Independent adjusting function structure of double-needle split thread passing plate of sewing machine head

Abstract

The utility model provides a double-needle split thread passing plate independent adjusting function structure of a sewing machine head, and belongs to the technical field of sewing machines. The upper thread tensioning device solves the problem of how to adjust the tensioning degree of a single upper thread. According to the independent adjustment function structure of the double-needle split thread passing plate of the sewing machine head, a sewing machine comprises a machine shell; the double-needle split wire passing plate independent adjusting function structure of the machine head comprises a wire passing plate I, an adjusting screw I, an adjusting screw II and a wire passing plate II, wherein the plate surface of the wire passing plate II is opposite to the plate surface of the wire passing plate I; the first adjusting screw is in threaded connection with the machine shell and tightly presses the first wire passing plate and the second wire passing plate on the outer wall of the machine shell together, the second adjusting screw is in threaded connection with the machine shell and tightly presses the first wire passing plate on the outer wall of the machine shell, and a gap is formed between the head of the second adjusting screw and the second wire passing plate. The independent adjusting function structure of the double-needle split thread passing plate of the sewing machine head can adjust the tension degree of a single upper thread.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines, and relates to a double-needle split thread passing board independent adjustment function structure for a sewing machine head. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a sewing material, so as to interweave or sew together one or more layers of sewing materials.

[0003] Among them, the above-mentioned sewing thread specifically includes the top thread and the bobbin thread. For the situation where two top threads cooperate to sew the sewing material, it is often necessary to arrange the second top thread on the premise of the original single-thread wiring. However, if the existing thread passing board is used to cooperate with the above wiring method, it is necessary to thread the two top threads together through the thread passing holes opened on the thread passing board, which will inevitably cause the two top threads to be entangled and knotted during the working process of the sewing machine.

[0004] Therefore, in view of the above defects, in the prior art, in order to avoid this situation, two thread passing holes are often opened on the thread passing board, and the two top threads are respectively threaded through the two thread passing holes, so as to avoid the situation of entanglement and knotting of the two top threads during the extraction process.

[0005] However, in the actual working process, the requirements for the tension of the two top threads are different when different sewing materials are being sewn. Simply put, it is necessary to increase or decrease the tension of one top thread while keeping the tension of the other top thread unchanged. And the tension adjustment of the top thread is actually determined by the pressing degree between the top thread and the hole wall of the thread passing hole. For the thread passing board with the above structure, when adjusting the position of the thread passing board, the thread passing board will drive the two thread passing holes to move synchronously. Therefore, it is impossible to adjust the tension of a single top thread. Summary of the Invention

[0006] The purpose of the utility model is to propose a double-needle split thread passing board independent adjustment function structure for a sewing machine head in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to adjust the tension of a single top thread.

[0007] The object of the present utility model can be achieved by the following technical solutions: A double-needle split thread guide independent adjustment function structure for a sewing machine head. The sewing machine includes a machine shell. The double-needle split thread guide independent adjustment function structure of the sewing machine head includes a thread guide one. It is characterized in that the double-needle split thread guide independent adjustment function structure of the sewing machine head further includes an adjusting screw one, an adjusting screw two, and a thread guide two whose plate surface is arranged opposite to the plate surface of the thread guide one. The adjusting screw one is screwed with the machine shell and presses the thread guide one and the thread guide two together on the outer wall of the machine shell. The adjusting screw two is screwed with the machine shell and presses the thread guide one on the outer wall of the machine shell, and there is a gap between the head of the adjusting screw two and the thread guide two.

[0008] The double-needle split thread guide independent adjustment function structure of the sewing machine head fixes the thread guide one and the thread guide two through the cooperation of the adjusting screw one and the adjusting screw two. Specifically, the adjusting screw one is the main fixing part, and it presses the thread guide one and the thread guide two together on the machine shell by screwing with the machine shell to ensure the stability of the thread guide one and the thread guide two during the working process of the sewing machine. The adjusting screw two is mainly used for further pressing the thread guide one. When the user needs to adjust the tension of the sewing thread passing through the thread guide two, the user can loosen the adjusting screw one with a screwdriver. At this time, although the loosening of the adjusting screw one makes the thread guide one and the thread guide two no longer be pressed together, due to the existence of the adjusting screw two, the thread guide one still remains positioned on the outer wall of the machine shell, and the thread guide two can be movable relative to the thread guide one. The user can manually push and pull the thread guide two to adjust its installation position relative to the thread guide one by a certain amplitude, so that the position of the thread passing hole on the thread guide two can change relative to the thread passing hole on the thread guide one, thereby achieving the purpose of single-root adjustment of the surface thread tension of the thread passing through the thread guide two.

[0009] In the above-mentioned independent adjustment function structure of the double-needle split thread guide plate of the sewing machine head, a tension pad made of an elastic material is provided between the first thread guide plate and the second thread guide plate. A tightening ring is sleeved outside the second adjusting screw and abuts against the outer wall of the tension pad, and the thickness of the tightening ring is greater than the thickness of the second thread guide plate. When pressing the first thread guide plate and the second thread guide plate, the elastic deformation of the tension pad ensures higher connection stability between the first thread guide plate and the second thread guide plate. Secondly, it can also separate the first thread guide plate and the second thread guide plate to avoid interference between the first thread guide plate and the second thread guide plate when adjusting the position of the second thread guide plate. In addition, the pressing of the first thread guide plate by the second adjusting screw is achieved through the tightening ring. Since the thickness of the tightening ring is greater than the thickness of the second thread guide plate, during the process of tightening the second adjusting screw, the tightening force of the second adjusting screw causes the tightening ring to press the tension pad, and the tension pad presses the first thread guide plate. And due to the thickness difference between the tightening ring and the second thread guide plate, a gap is formed between the head of the second adjusting screw and the plate surface of the second thread guide plate.

[0010] In the above-mentioned independent adjustment function structure of the double-needle split thread guide plate of the sewing machine head, a first strip hole and a second strip hole with the same orientation are formed on the plate surface of the first thread guide plate, a third strip hole and a fourth strip hole with the same orientation are formed on the plate surface of the second thread guide plate, the first strip hole and the third strip hole are opposite in position, the second strip hole and the fourth strip hole are opposite in position, the first adjusting screw is inserted into the first strip hole and the third strip hole, the second adjusting screw is inserted into the second strip hole and the fourth strip hole, and the tightening ring is embedded and limited in the fourth strip hole. The cooperation of the first strip hole, the third strip hole and the first adjusting screw, and the cooperation of the second strip hole, the fourth strip hole and the second adjusting screw are used to limit the position adjustment direction of the second thread guide plate to prevent it from shifting in other directions during the adjustment process. Secondly, the tightening ring is embedded in the fourth strip hole to ensure a gap is formed between the second adjusting screw and the second thread guide plate.

[0011] In the above-mentioned independent adjustment function structure of the double-needle split thread guide plate of the sewing machine head, a first washer is sleeved outside the first adjusting screw, and a second washer is sleeved outside the second adjusting screw. One side of the first washer abuts against the outer wall of the second thread guide plate, and the other side abuts against the head of the first adjusting screw. One side of the second washer abuts against the tightening ring, and the other side abuts against the head of the second adjusting screw. Through the arrangement of the first washer and the second washer, it is ensured that the installation stability of the first thread guide plate and the second thread guide plate is higher when the first adjusting screw and the second adjusting screw are in the screwed and locked state.

[0012] In the above-mentioned double-needle split thread guide independent adjustment function structure of the sewing machine head, the first thread guide and the second thread guide are in the shape of long strip plates. The first strip hole and the second strip hole are arranged side by side along the length direction of the first thread guide, and the third strip hole and the fourth strip hole are arranged side by side along the length direction of the second thread guide. This makes the widths of the first thread guide and the second thread guide smaller, minimizing the installation space required for the two as much as possible and improving the space utilization rate of the outer wall of the machine shell.

[0013] Compared with the prior art, the double-needle split thread guide independent adjustment function structure of this sewing machine head has the following advantages:

[0014] The first thread guide and the second thread guide are locked together by adjusting screw 1, and the first thread guide is locked by adjusting screw 2. A gap is formed between the head of adjusting screw 2 and the plate surface of the second thread guide. When adjustment is needed, loosen adjusting screw 1 to make the second thread guide in a movable state, while the first thread guide remains positioned due to the existence of adjusting screw 2. Thus, the position of the second thread guide can be adjusted independently relative to the first thread guide, and further, the tension of one of the thread lines can be adjusted independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the double-needle split thread guide independent adjustment function structure of this sewing machine head.

[0016] Figure 2 is a front view of the double-needle split thread guide independent adjustment function structure of this sewing machine head.

[0017] Figure 3 is Figure 2 a sectional view taken along the A-A direction in

[0018] Figure 4 and its partial enlarged view.

[0019] In the figure, 1, machine shell; 2, first thread guide; 21, first strip hole; 22, second strip hole; 3, adjusting screw; 31, first washer; 4, second adjusting screw; 41, tightening ring; 42, second washer; 5, second thread guide; 51, third strip hole; 52, fourth strip hole; 6, gap; 7, tension pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0021] Such as Figure 1 、 Figure 2 and Figure 4As shown, in the double-needle split thread plate independent adjustment function structure of the sewing machine head, the sewing machine includes a casing 1, and the double-needle split thread plate independent adjustment function structure of the machine head includes an adjustment screw 3, an adjustment screw 4, a long strip-shaped thread plate 2 and a long strip-shaped thread plate 5, a strip hole 1 21 and a strip hole 2 22 arranged side by side are opened on the plate surface of the thread plate 2 along the length direction, a strip hole 3 51 and a strip hole 4 52 arranged side by side are opened on the plate surface of the thread plate 2 along the length direction, and the thread plate 1 2 and the thread plate 2 5 are located on the outer wall of the casing 1. The strip holes 21 and 22 are arranged opposite to each other, and the strip holes 22 and 23 are arranged opposite to each other. A tensioning pad 7 made of elastic material is provided between the wire-passing plate 1 2 and the wire-passing plate 2 5. The tensioning pad 7 can be made of rubber material or silicone material. The tensioning pad 7 is in the shape of a rectangular plate, and two clearance holes are provided on its surface. The two clearance holes are arranged at intervals along the length direction of the tensioning pad 7, and one of the clearance holes is located between the strip holes 21 and the strip holes 3 51, and the other clearance hole is located between the strip holes 22 and the strip holes 4 52.

[0022] Combination Figure 3 The adjusting screw 3 passes through the strip hole 3 51, one of the clearance holes, the strip hole 1 21 in sequence and is screwed to the housing 1. A washer 31 is sleeved on the rod of the adjusting screw 3. Under the action of tightening the thread, the head of the adjusting screw 3 continuously presses the wire plate 2 5, the tensioning pad 7 and the wire plate 2 together on the outer wall of the housing 1 through the washer 31. A tightening ring 41 and a washer 2 42 are sleeved on the rod of the adjusting screw 2 4. The tightening ring 41 is located in front of the washer 2 42. The adjusting screw passes through the strip hole four 52, another clearance hole, the strip hole one 21 and is screwed with the casing 1, so that the tightening ring 41 is embedded in the strip hole four 52. Since the thickness of the tightening ring 41 is greater than the thickness of the wire plate two 5, a gap 6 is formed between the head of the adjusting screw two 4 and the surface of the wire plate two 5. Under the action of tightening the thread, the head of the adjusting screw two 4 continuously presses the tightening ring 41, the tensioning pad 7 and the wire plate one 2 against the outer wall of the casing 1 through the washer two 42.

[0023] Principle of operation: Loosen the adjusting screw 3 outwards. At this time, due to the existence of the gap 6 between the adjusting screw 24 and the wire-passing plate 25, the wire-passing plate 25 can slide relative to the wire-passing plate 2 along the length direction of the strip hole 3 51 and the strip hole 4 52 under the limiting guidance of the adjusting screw 3 and the adjusting screw 24. The wire-passing plate 2 maintains its installation position due to the pressing effect of the clamping ring 41 and the tensioning pad 7. The user can adjust the position of the wire-passing plate 25 in a targeted manner. After the adjustment, the adjusting screw 3 can be re-threaded and locked.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0025] Although terms such as housing 1, first wire passing plate 2, first strip hole 21, second strip hole 22, adjusting screw 3, first washer 31, second adjusting screw 4, tightening ring 41, second washer 42, second wire passing plate 5, third strip hole 51, fourth strip hole 52, gap 6, tension pad 7, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A double-needle split thread plate independent adjustment function structure of a sewing machine head, the sewing machine comprising a housing (1), the double-needle split thread plate independent adjustment function structure of the machine head comprising a thread plate 1 (2), characterized in that: The double-needle split wire-passing plate independent adjustment function structure of the machine head also includes an adjustment screw 1 (3), an adjustment screw 2 (4) and a wire-passing plate 2 (5) whose plate surface is arranged opposite to the plate surface of the wire-passing plate 1 (2), wherein the adjustment screw 1 (3) is screwed to the machine housing (1) and presses the wire-passing plate 1 (2) and the wire-passing plate 2 (5) together onto the outer wall of the machine housing (1), the adjustment screw 2 (4) is screwed to the machine housing (1) and presses the wire-passing plate 1 (2) onto the outer wall of the machine housing (1), and there is a gap (6) between the head of the adjustment screw 2 (4) and the wire-passing plate 2 (5).

2. The double-needle split thread plate independent adjustment function structure of the sewing machine head according to claim 1 is characterized in that: A tensioning pad (7) made of elastic material is provided between the first wire-passing plate (2) and the second wire-passing plate (5), and a retaining ring (41) is provided on the outer sleeve of the second adjusting screw (4) to be pressed against the outer wall of the tensioning pad (7), and the thickness of the retaining ring (41) is greater than the thickness of the second wire-passing plate (5).

3. The double-needle split thread plate independent adjustment function structure of the sewing machine head according to claim 2 is characterized in that: The first wire plate (2) is provided with a first strip hole (21) and a second strip hole (22) facing the same direction on its surface, and the second wire plate (5) is provided with a third strip hole (51) and a fourth strip hole (52) facing the same direction on its surface, the first strip hole (21) and the third strip hole (51) are positioned opposite to each other, and the second strip hole (22) and the fourth strip hole (52) are positioned opposite to each other, the first adjustment screw (3) is inserted into the first strip hole (21) and the third strip hole (51), the second adjustment screw (4) is inserted into the second strip hole (22) and the fourth strip hole (52), and the tightening ring (41) is embedded in and limited in the fourth strip hole (52).

4. The double-needle split thread plate independent adjustment functional structure of the sewing machine head according to claim 2 or 3, characterized in that: The outer sleeve of the adjusting screw 1 (3) is provided with a washer 1 (31), and the outer sleeve of the adjusting screw 2 (4) is provided with a washer 2 (42); one side of the washer 1 (31) is tightly pressed against the outer wall of the wire-passing plate 2 (5), and the other side is tightly pressed against the head of the adjusting screw 1 (3); one side of the washer 2 (42) is tightly pressed against the pressing ring (41), and the other side is tightly pressed against the head of the adjusting screw 2 (4).

5. The double-needle split thread plate independent adjustment function structure of the sewing machine head according to claim 3 is characterized in that: The first wire-passing plate (2) and the second wire-passing plate (5) are in the shape of long strips, the first strip hole (21) and the second strip hole (22) are arranged side by side along the length direction of the first wire-passing plate (2), and the third strip hole (51) and the fourth strip hole (52) are arranged side by side along the length direction of the second wire-passing plate (5).

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