Interaction quantity integrated installation function structure of sewing machine head

Abstract

The utility model provides an interaction quantity integrated installation function structure of a sewing machine head, and belongs to the technical field of sewing machines. The problem of how to improve the adjustment convenience of the interaction amount of the presser foot is solved. The interaction quantity integrated installation function structure of the sewing machine head comprises a switching shaft, an air cylinder and a fixing plate, a main ball head and an auxiliary ball head are arranged on the outer wall of the switching shaft in the length direction at intervals, the air cylinder is located on one side of the switching shaft and is in transmission connection with the switching shaft through a crank, and the fixing plate is located on the other side of the switching shaft. A main adjusting knob assembly and an auxiliary adjusting knob assembly are detachably connected to the fixing plate, the main adjusting knob assembly is opposite to the main ball head in position, the auxiliary adjusting knob assembly is opposite to the auxiliary ball head in position, the main ball head abuts against the main adjusting knob assembly, and the air cylinder can drive the switching shaft to rotate so that the auxiliary ball head can abut against the auxiliary adjusting knob assembly. The interaction amount integrated installation function structure of the sewing machine head can improve the adjustment convenience of the interaction amount of the presser foot.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to an interactive quantity integrated installation functional structure of a sewing machine head. Background Technique

[0002] In the process of processing multi-layer or relatively thick sewing materials, it is a widely used technology in current sewing machines to use a double presser foot in cooperation with a feed dog for feeding. During normal operation, the inner and outer presser feet need to ensure the action of alternately pressing the material. For sewing materials of different thicknesses, it is necessary to adjust the interaction quantity of the two presser feet before working. The so-called interaction quantity adjustment can be simply understood as adjusting the initial distance between the two presser feet.

[0003] For example, the presser foot interaction quantity adjustment and quick switching mechanism of a comprehensive feeding thick material sewing machine disclosed in Chinese Patent (Publication No.: CN113279156A) includes a rotatable upper adjusting member and a rotatable lower adjusting member. The upper adjusting member has a spiral upper adjusting surface, and the lower adjusting member has a spiral lower adjusting surface. One end of the linkage member is connected to the switching shaft member, and the other end is connected to both the outer presser foot member and the inner presser foot member. The switching shaft member has a protruding switching convex block. The driver can drive the switching shaft member to rotate so that the switching convex block abuts against the upper spiral surface or the lower spiral surface, and the rotation of the switching shaft member can change the interaction quantity of the outer presser foot member and the inner presser foot member through the linkage member.

[0004] Combined with Paragraph 0033 of the specification of the comparative document, before working, first measure the smaller thickness and the larger thickness of the sewing material during sewing, then rotate the upper adjusting knob 63 to the interaction quantity of the smaller thickness, and rotate the lower adjusting knob to the interaction quantity of the larger thickness. As shown in Figure 5, when sewing a relatively thin sewing material, the driver 3 drives the switching shaft member 4 to rotate so that the switching convex block 41 abuts against the upper adjusting surface 61. At the same time, the rotation of the switching shaft member 4 will drive the outer presser foot member 1 and the inner presser foot member 2 to move through the linkage member 5, so that the height difference between the outer presser foot member 1 and the inner presser foot member 2 is small, that is, the interaction quantity is relatively small. As shown in Figure 6, when sewing to a step and needing to sew a relatively thick sewing material, the driver 3 drives the switching shaft member 4 to rotate so that the switching convex block 41 quickly abuts against the lower adjusting surface 71. At the same time, the rotation of the switching shaft member 4 will drive the outer presser foot member 1 and the inner presser foot member 2 to move through the linkage member 5, so that the height difference between the outer presser foot member 1 and the inner presser foot member 2 is large, that is, the interaction quantity is relatively large, so that this thick material sewing machine can sew sewing materials with a step difference.

[0005] That is to say, the solution disclosed in the comparative document is mainly to ensure that adjustment can be performed when there is a large difference in thickness between different areas of the sewing material. In simple terms, it can be understood that: when the switching protrusion abuts against the upper adjustment surface, it is mainly to ensure that the sewing machine is suitable for sewing materials with a smaller thickness (such as between 1-5 mm); when the switching body abuts against the lower adjustment surface, it is mainly to ensure that the sewing machine is suitable for sewing materials with a smaller thickness (such as between 5-9 mm).

[0006] However, in the actual operation process, incorrect operation of the switching protrusion abutting part often occurs during the operation, that is, when a smaller interaction amount needs to be adjusted, the switching protrusion abuts against the lower adjustment surface due to incorrect operation, and when a larger interaction amount needs to be adjusted, the switching protrusion abuts against the upper adjustment surface due to incorrect operation. The user is unable to quickly distinguish between the adjustment of large interaction amounts and the adjustment of small interaction amounts, and the operation is very inconvenient. Summary of the invention

[0007] The purpose of the utility model is to solve the above problems in the existing technology and propose an interactive amount integrated installation function structure of a sewing machine head. The technical problem to be solved by the utility model is: how to improve the convenience of adjusting the interactive amount of the presser foot.

[0008] The purpose of the utility model can be achieved through the following technical solutions: a functional structure for interactive integrated installation of a sewing machine head, comprising a switching shaft with a main ball head and a secondary ball head spaced apart along the length direction on the outer wall, a cylinder located on one side of the switching shaft and connected to the switching shaft through a crank, and a fixed plate located on the other side of the switching shaft, the main ball head and the secondary ball head are staggered along the circumferential direction of the switching shaft, a main adjusting knob assembly and a secondary adjusting knob assembly that can rotate relative to the fixing plate are detachably connected to the fixing plate, the main adjusting knob assembly is opposite to the main ball head, the secondary adjusting knob assembly is opposite to the secondary ball head, the main ball head abuts against the main adjusting knob assembly, and the cylinder can drive the switching shaft to rotate so that the secondary ball head abuts against the secondary adjusting knob assembly.

[0009] The interactive volume integrated installation function structure of this sewing machine head uses the main adjustment knob assembly and the auxiliary adjustment knob assembly to cooperate to adjust the presser foot interactive volume. Specifically, the user can drive the switching shaft to rotate through the cooperation of the air cylinder and the crank, so that the main ball head first abuts against the main adjustment knob assembly. In this state, the user can turn the main adjustment knob assembly. By rotating the main adjustment knob assembly, the main adjustment knob assembly, the main ball head and the switching shaft cooperate to adjust the presser foot interactive volume of the sewing machine for the first time. At this time, the adjustment amount can be regarded as a situation with a relatively small adjustment amount. After completing this operation, if the presser foot interactive volume of the sewing machine does not meet the actual requirements, since the main ball head has separated from the main adjustment knob assembly at this time, turning the main adjustment knob assembly can no longer push the ball head to drive the switching shaft to rotate. At this time, the air cylinder cooperates with the crank to drive the switching shaft to rotate again, so that the auxiliary ball head abuts against the auxiliary adjustment knob assembly. In this state, the user can turn the auxiliary adjustment knob assembly. By rotating the auxiliary adjustment knob assembly, the auxiliary adjustment knob assembly, the auxiliary ball head and the switching shaft cooperate to adjust the presser foot interactive volume of the sewing machine for the second time. At this time, the adjustment amount can be regarded as a situation with a relatively large adjustment amount, so as to ensure that the adjustment of the presser foot interactive volume of the sewing machine meets the actual requirements. Secondly, it can avoid the situation of switching the up and down positions of the switching convex block when adjusting the large and small interactive volumes of the presser foot in the prior art, effectively avoiding the situation of incorrect identification and incorrect operation by the user and ensuring the convenience of operation. And for the different working requirements of different models, such as only having the need for small interactive volume adjustment, the manufacturer can choose whether to install the auxiliary adjustment knob assembly on the fixed plate according to the actual needs, and the subsequent purchasers of the sewing machine can also choose whether to install the auxiliary adjustment knob assembly according to their own needs, ensuring higher adaptability while ensuring the production cost.

[0010] In the interactive volume integrated installation function structure of the above-mentioned sewing machine head, the main adjustment knob assembly includes a main rotating shaft rotatably connected to the fixed plate in the vertical direction and a main cam positioned at the lower end of the main rotating shaft. The auxiliary adjustment knob assembly includes an auxiliary rotating shaft rotatably connected to the fixed plate in the vertical direction and an auxiliary cam positioned at the lower end of the auxiliary rotating shaft. The main ball head abuts against the main cam, and the auxiliary ball head abuts against the auxiliary cam. Specifically, before the formal adjustment work, the necessary transmission connection is completed by the abutment of the main ball head on the switching shaft with the main cam or the auxiliary ball head with the auxiliary cam. Subsequently, the user can manually control the main rotating shaft or the auxiliary rotating shaft, and complete the first adjustment of the presser foot interactive volume of the sewing machine through the cooperation of the main cam and the main ball head. When the adjustment amount does not meet the requirements, the second adjustment of the presser foot interactive volume of the sewing machine is completed through the cooperation of the auxiliary cam and the auxiliary ball head.

[0011] In the above-mentioned interaction volume integrated installation functional structure of the sewing machine head, the length of the main rotating shaft is longer than that of the secondary rotating shaft. This ensures that the installation position of the main adjustment knob assembly is adapted to the installation position of the main ball head, and the installation position of the secondary adjustment knob assembly is adapted to the installation position of the secondary ball head, while avoiding interference between the main adjustment knob assembly and the secondary adjustment knob assembly during the adjustment process.

[0012] In the above-mentioned interaction volume integrated installation functional structure of the sewing machine head, the main adjustment knob assembly further includes a main rotating cover, and the secondary adjustment knob assembly further includes a secondary rotating cover. The main rotating cover covers the upper end of the main rotating shaft and is locked by screwing with screws. The secondary rotating cover covers the upper end of the secondary rotating shaft and is locked by screwing with screws. Specifically, the user manually rotates the main rotating cover to drive the main cam to rotate through the main rotating shaft, thereby achieving a primary adjustment of the interaction volume of the sewing machine presser foot. And by manually rotating the secondary rotating cover, the secondary cam is driven to rotate through the secondary rotating shaft, thereby achieving a secondary adjustment of the interaction volume of the sewing machine presser foot.

[0013] In the above-mentioned interaction volume integrated installation functional structure of the sewing machine head, the driving shaft of the cylinder is arranged vertically. A positioning hole is formed in the crank. The crank is sleeved on the switching shaft. A contact pin that abuts against the outer wall of the switching shaft is screwed in the positioning hole, and the crank is hinged to the driving shaft of the cylinder through a transmission pin. Through this setting, the connection between the crank and the switching shaft is firm, and when the crank wears later, it can be replaced separately.

[0014] In the above-mentioned interaction volume integrated installation functional structure of the sewing machine head, the interaction volume integrated installation functional structure of this sewing machine head further includes a hanging spring and a positioning shaft located below the cylinder. The cylinder is hinged to the positioning shaft. The upper end of the hanging spring is connected to the transmission pin, and the lower end of the hanging spring is connected to the positioning shaft. During the primary adjustment, the cylinder is in a stopped operation state. At this time, when its driving shaft is stressed, it will freely expand and contract. Through the setting of the hanging spring in this case, the driving shaft of the cylinder is tightened in this state, thereby ensuring sufficient and reliable force between the main ball head and the main cam.

[0015] Compared with the prior art, the interaction volume integrated installation functional structure of this sewing machine head has the following advantages:

[0016] 1. Through the settings of the main adjustment knob assembly and the secondary adjustment knob assembly, the interaction volume of the presser foot can be primarily adjusted through the main adjustment knob assembly and secondarily adjusted through the secondary adjustment knob assembly, so that the adjustment of the interaction volume of the presser foot progresses step by step from small to large, without the need for switching operations during the two adjustment processes, effectively avoiding the situations of incorrect identification and incorrect operation by the user, and ensuring the convenience of operation.

[0017] 2. The auxiliary adjustment knob assembly can be assembled according to actual needs, ensuring structural adaptability while keeping the production cost lower. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the interaction quantity integrated installation function structure of the sewing machine head.

[0019] Figure 2 is a schematic structural diagram of another perspective of the interaction quantity integrated installation function structure of the sewing machine head.

[0020] Figure 3 is a cross-sectional view of the fixed plate, the main adjustment knob assembly, and the auxiliary adjustment knob assembly cut along the length direction of the switching shaft.

[0021] Figure 4 is a cross-sectional view of the switching shaft cut along the width direction and its partial enlarged view.

[0022] In the figure,

[0023] 1. Switching shaft; 11. Main ball head; 12. Auxiliary ball head; 13. Crank; 131. Positioning hole; 1311. Abutting pin;

[0024] 2. Cylinder;

[0025] 3. Fixed plate; 31. Main adjustment knob assembly; 311. Main rotating shaft; 312. Main cam; 313. Main rotating cover; 32. Auxiliary adjustment knob assembly; 321. Auxiliary rotating shaft; 322. Auxiliary cam; 323. Auxiliary rotating cover;

[0026] 4. Transmission pin;

[0027] 5. Hanging spring;

[0028] 6. Positioning shaft. Detailed Implementation Modes

[0029] 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.

[0030] As Figures 1-4As shown, the interactive integrated installation functional structure of the sewing machine head includes a switching shaft 1, a fixing plate 3 located on one side of the switching shaft 1, and a cylinder 2 located on the other side of the switching shaft 1, wherein a main ball head 11 and a secondary ball head 12 are installed on the switching shaft 1 along the length direction by screw connection, and the main ball head 11 and the secondary ball head 12 are staggered along the circumference of the switching shaft 1, and the fixing plate 3 is specifically in the shape of a long strip and is arranged along the length direction of the switching shaft 1, and a main mounting hole and a secondary mounting hole are opened on the plate surface, and a main adjusting knob assembly 31 is rotatably connected to the main mounting hole of the fixing plate 3, and a main adjusting knob assembly 31 is rotatably connected to the secondary mounting hole of the fixing plate 3. A secondary adjusting knob assembly 32 is rotatably connected, the cylinder 2 is vertically arranged with the driving shaft of the cylinder 2 facing upward, and a crank 13 is provided on one side of the main ball head 11 on the switching shaft 1. The crank 13 is specifically arranged on the switching shaft 1 in a sleeve-type manner, and two positioning holes 131 are provided on its outer wall. A contact pin 1311 is screwed in each positioning hole 13, and each contact pin 1311 is tightly pressed against the outer wall of the switching shaft 1, and the driving shaft of the cylinder 2 is hinged to the crank 13 through a transmission pin 4, and a positioning shaft 6 arranged parallel to the switching shaft 1 is provided below the cylinder 2, and the lower end of the cylinder 2 is hinged to the positioning shaft 6.

[0031] like Figure 3 As shown, the main adjustment knob assembly 31 specifically includes a main cam 312, a main rotating cover 313 and a main rotating shaft 311 arranged vertically, the main rotating shaft 311 is rotatably connected in the main mounting hole, the main cam 312 and the lower end of the main rotating shaft 311 are pre-positioned in a card-joined manner through a special-shaped hole, and are tightened by screws and gaskets, the main rotating cover 313 is covered at the upper end of the main rotating shaft 311 and is screwed and locked by screws, the auxiliary adjustment knob assembly 32 specifically includes an auxiliary cam 322, an auxiliary rotating cover 323 and a auxiliary rotating shaft 321 arranged vertically, the auxiliary rotating shaft 321 is rotatably connected in the auxiliary mounting hole, the auxiliary cam 322 and the lower end of the auxiliary rotating shaft 321 are pre-positioned in a card-joined manner through a special-shaped hole, and are tightened by screws and gaskets, the auxiliary rotating cover 323 is covered at the upper end of the auxiliary rotating shaft 321 and is screwed and locked by screws.

[0032] In addition, Figure 1 and Figure 2 As shown, a hanging spring 5 is provided on one side of the cylinder 2, the upper end of the hanging spring 5 is connected to the transmission pin 4 by a hook connection, and the lower end is connected to the positioning shaft 6 by a hook connection. Furthermore, annular grooves are provided on the transmission pin 4 and the positioning shaft 6, and the upper end of the hanging spring 5 is clamped in the annular groove of the transmission pin 4, and the lower end is clamped in the annular groove of the positioning shaft 6.

[0033] In this embodiment Figure 1 and Figure 2 The state shown is a state where the primary ball head 11 is separated from the primary cam 312 and the secondary ball head 12 is in contact with the secondary cam 322 .

[0034] Operating principle: The cylinder 2 stops running. The elastic force of the hanging spring 5 cooperates with the transmission pin 4 to prevent the drive shaft of the cylinder 2 from freely telescoping, so that the main ball head 11 abuts against the outer wall of the main cam 312. At this time, the main adjustment knob assembly 31 is in a connected state, and the secondary adjustment knob assembly 32 is in a disconnected state. The user only needs to turn the main rotating cover 313 corresponding to the scale mark to complete one adjustment of the presser foot interaction amount. If the adjustment amount meets the requirements, one adjustment work is completed at this time.

[0035] If the adjustment amount is less than the actual required amount, since the secondary ball head 12 and the main ball head 11 are arranged out of position on the switching shaft 1, when the main ball head 11 separates from the main cam 312, the secondary ball head 12 can abut against the outer wall of the secondary cam 322. At this time, the secondary adjustment knob assembly 32 is in a connected state, and the main adjustment knob assembly 31 is in a disconnected state. It is worth mentioning that there are two methods for the secondary adjustment of the presser foot interaction amount. One of them is: before the cylinder 2 works, first turn the secondary rotating cover 323 corresponding to the scale mark to preset the adjustment amount for the secondary adjustment of the presser foot interaction amount, and then only need to control the cylinder 2 to start, so that the secondary ball head 12 abuts against the outer wall of the secondary cam 322 to complete the secondary adjustment of the presser foot interaction amount; the other is: the secondary ball head 12 abuts against the outer wall of the secondary cam 322. At this time, the user turns the secondary rotating cover 323 corresponding to the scale mark, so that the secondary rotating shaft 321 drives the secondary cam 322 to rotate, and the cylinder 2 drives its drive shaft to continuously extend upward, so that the secondary ball head 12 always abuts against the outer wall of the secondary cam 322 until the secondary rotating cover 323 rotates to the specified scale.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Although terms such as switching shaft 1, main ball head 11, secondary ball head 12, crank 13, positioning hole 131, abutting pin 1311, cylinder 2, fixing plate 3, main adjustment knob assembly 31, main rotating shaft 311, main cam 312, main rotating cover 313, secondary adjustment knob assembly 32, secondary rotating shaft 321, secondary cam 322, secondary rotating cover 323, transmission pin 4, hanging spring 5, positioning shaft 6, etc. are used more in this article, the possibility of using other terms is not excluded. The use of these terms is only for more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A functional structure for the integrated installation of an interactive quantity of a sewing machine head, comprising a switching shaft (1) on the outer wall of which a main ball head (11) and a secondary ball head (12) are arranged at intervals along the length direction, a cylinder (2) located on one side of the switching shaft (1) and connected to the switching shaft (1) through a crank (13), and a fixing plate (3) located on the other side of the switching shaft (1), characterized in that: The main ball head (11) and the secondary ball head (12) are arranged in a circumferentially staggered manner along the switching shaft (1); a main adjusting knob assembly (31) and a secondary adjusting knob assembly (32) which are detachably connected to the fixing plate (3) and are capable of rotating relative to the fixing plate (3); the main adjusting knob assembly (31) and the main ball head (11) are positioned opposite to each other; the secondary adjusting knob assembly (32) and the secondary ball head (12) are positioned opposite to each other; the main ball head (11) and the main adjusting knob assembly (31) are abutted against each other; and the cylinder (2) can drive the switching shaft (1) to rotate so that the secondary ball head (12) and the secondary adjusting knob assembly (32) are abutted against each other.

2. The interactive quantity integrated installation functional structure of the sewing machine head according to claim 1 is characterized in that: The main adjustment knob assembly (31) comprises a main rotating shaft (311) connected to the fixed plate (3) in a vertical rotation direction, and a main cam (312) positioned at the lower end of the main rotating shaft (311); the auxiliary adjustment knob assembly (32) comprises an auxiliary rotating shaft (321) connected to the fixed plate (3) in a vertical rotation direction, and an auxiliary cam (322) positioned at the lower end of the auxiliary rotating shaft (321); the main ball head (11) abuts against the main cam (312), and the auxiliary ball head (12) abuts against the auxiliary cam (322).

3. The interactive quantity integrated installation functional structure of the sewing machine head according to claim 2 is characterized in that: The length of the main rotating shaft (311) is longer than the length of the secondary rotating shaft (321).

4. The interactive quantity integrated installation functional structure of the sewing machine head according to claim 2 or 3, characterized in that: The main adjusting knob assembly (31) further comprises a main rotating cover (313), and the auxiliary adjusting knob assembly (32) further comprises an auxiliary rotating cover (323). The main rotating cover (313) is disposed on the upper end of the main rotating shaft (311) and is screwed and locked by screws, and the auxiliary rotating cover (323) is disposed on the upper end of the auxiliary rotating shaft (321) and is screwed and locked by screws.

5. The interactive quantity integrated installation functional structure of the sewing machine head according to any one of claims 1 to 3, characterized in that: The drive shaft of the cylinder (2) is arranged vertically, a positioning hole (131) is provided on the crank (13), the crank (13) is sleeved on the switching shaft (1), an abutment pin (1311) is threadedly connected in the positioning hole (131) and abuts against the outer wall of the switching shaft (1), and the crank (13) and the drive shaft of the cylinder (2) are hingedly connected via a transmission pin (4).

6. The interactive quantity integrated installation functional structure of the sewing machine head according to claim 5, characterized in that: The interactive integrated installation functional structure of the sewing machine head also includes a hanging spring (5) and a positioning shaft (6) located below the cylinder (2), the cylinder (2) and the positioning shaft (6) are hinged, the upper end of the hanging spring (5) is connected to the transmission pin (4), and the lower end of the hanging spring (5) is connected to the positioning shaft (6).

Images