TWI585262B - Curved arm type sewing machine structure - Google Patents

Description

Curved arm sewing machine structure

The present invention relates to a sewing machine structure, and more particularly to a crank arm type sewing machine structure.

First of all, the so-called "crank-arm sewing machine" in this case has the structural characteristics or functions mainly because it can join the edges of the two pieces of cloth and then suture them. Therefore, it is also called "sewing sewing machine" in the industry. Or "co-sewing sewing machine"; however, because it is usually sewn with four stitches and six threads (including the bottom line), it is often referred to by the industry as "four-needle six-wire sewing machine" or "four-needle six". Line sewing machine."

Furthermore, referring to the prior art related to the technical field of the present invention, please refer to FIG. 1 and FIG. 2, as is clear from the figure, the conventional crank-type sewing machine 10 is provided by a base 100. Fixed on the table top, the conventional crank-type sewing machine 10 includes at least a main casing 11 and a lower casing 12 located below the main casing 11, the conventional crank-type sewing machine 10 being disposed on the mainframe The driving motor 80 at the end of the casing 11 is driven; wherein the lower casing 12 has a sewing platform 121, and the sewing platform 121 has a sewing zone 13 at the end. However, if you can observe in detail the usage diagram of the existing crank-arm sewing machine shown in Fig. 1 and the user's perspective view of the existing crank-arm sewing machine shown in Fig. 2, the existing crank arm type can be found. The outer casing structure of the sewing machine 10 is designed to have the following drawbacks: 1. Since the lower casing 12 of the conventional crank-type sewing machine 10 is directly disposed downward from the main casing 11, it is used in sewing. The line of sight of the sewing area 13 is completely blocked by the front end of the main casing 11, so that the user must always keep the body or the head in a sitting position inclined to the left, so that the user often causes the body to be caused by the scoliosis. The condition of the illness; secondly, because the front end of the main casing 11 of the existing crank-type sewing machine 10 completely blocks the line of sight viewed by the user to the sewing area 13, the user often cannot accurately sewn the seam, even A serious problem that often causes a user to accidentally push a finger into the sewing area 13 occurs. If so, the existing crank-arm sewing machine 10 has long existed a deep-deep sturdy outer casing structural design bias, and the technical bias of the internal mechanism configuration, it is indeed difficult to meet the needs of users. Therefore, how to maintain the user's good sitting posture during the sewing work and how to make the user work safer when sewing, is a top priority for this technology-related industry.

Please refer to the prior art of "Sewing Machine Flying Cam Device" of TW Patent Publication No. M508561, wherein the wire cam device of the sewing machine includes an upper threading mechanism, and the upper threading mechanism is disposed on the sewing machine. Inside the upper arm, the upper trimming mechanism is composed of an upper trim wire lifting cam, a first fixing plate, a wire rod bracket and an upper trim wire guide rod, and the upper trim wire lifting cam is supported a drive shaft of the upper arm of the sewing machine is penetrated and fixed to the drive spindle, the line cam device further includes a bottom thread mechanism, the bottom thread mechanism is disposed outside the upper arm of the sewing machine, The bottom wire mechanism is composed of a first fixing seat, a bottom wire lifting cam, a first fixing shaft, a second fixing seat, a pressing button, a reed, a second fixing plate, and a lower hook lifting guide. a wire plate, a spring, a ratchet wheel and a second fixed shaft, the second fixing plate can perform three-stage angle adjustment on the second fixing seat, and the wire cam device further includes a first time Regulating pulley, the first timing pulley The transmission main shaft supported by the upper arm of the sewing machine is penetrated and fixed, the line cam device further includes a second timing pulley, and the second timing pulley is fixed to one side of the bottom wire lifting cam, Passed by the first fixed shaft, the line cam device further includes a timing belt that meshes with the first timing pulley and the second timing pulley, respectively. It can be known from the foregoing prior art that in the sewing process of the sewing machine, the bottom thread must be extended by the bottom wire lifting cam to achieve the bottom thread can be fed by the sewing machine and adjust the tightness thereof. purpose. Since the prior art sling cam device is disposed inside the upper arm housing of the sewing machine, the user must open the upper arm when the bottom thread is worn. However, because The inner arm of the upper arm has many internal mechanisms and the space is very narrow. Therefore, the user's fingers are not easy to enter the bottom line, and the user often needs other auxiliary tools to complete the laying of the bottom line; therefore, It can be clearly seen from the above that the design of the cable cam device disposed inside the arm housing of the sewing machine does cause inconvenience and great trouble to the user when the bottom line is changed. Further, if the bottom line is not The condition of disconnection is cautious. At this time, the wire end formed by the broken wire is pulled by the wire cam device that is continuously rotated and twisted in the axis of the two component gaps such as the bottom wire lifting cam. On the column, if the user does not want to remove the bottom wire lifting cam and other components to remove the twisted bottom thread with great engineering, it is necessary to use a flat thin tool like a utility knife in a very narrow and narrow space. Difficult to pick and choose the twisted bottom line; however, although the user uses the flat thin tool to penetrate the gap of the component to cut the twisted bottom thread more conveniently, when the flat thin tool cuts the entangled line Also, because the flat thin tool may have a sharp winger, when the operation is slightly careless, it may cause the problem that the bottom wire lifting cam and the like are scratched by the sharp winger, and the cut is in the future. When the components such as the bottom wire lifting cam are operated, the main cause of the bottom wire breaking frequency is increased; therefore, regardless of the above prior art, the winding of the twisted bottom wire is removed in any manner, which is time consuming and laborious, and more serious. The machine is bound to stop working during the process of clearing the entanglement. If the machine has no spare machine to effectively dispatch the staff to join the production immediately, it will cause the production to decrease, which may affect the product delivery of the industry. The delivery period, this is a big nightmare and trouble for the sewing products processing manufacturers. It can be seen that in the technical field of the crank-type sewing machine, the related art of the prior art has long been deeply rooted in the technical position of the installation position and the structure of the cable cam device, but in fact the prior art does Has not met the user's needs. Therefore, how can the user more easily and quickly remove the bottom line wrapped in the gap between the above components, and how to make it easier and more convenient for the user to re-thread the bottom line. Relevant operators are imperative.

The main object of the present invention is to solve the above problems and problems of the prior art; the present invention provides a crank-type sewing machine structure with a modified outer casing structure, so that the user can easily look directly into the vehicle in addition to maintaining a good sitting posture. The seam area is used to maintain the health of the user, so that the user can achieve a safer working purpose when sewing the seam; another object of the present invention is to provide a user who can more easily and quickly remove the wrapped bottom thread. This makes it easier and more convenient for the user to re-thread the bottom thread dispenser of the bottom line to meet the needs of the user.

According to the above object, the present invention provides a crank-arm sewing machine structure, the arm-arm sewing machine structure comprising at least a main casing and a lower casing below the main casing; wherein the main casing and the casing are Between the casings, a lateral joint portion that is obliquely extended from the inner side of one end of the main casing to the lower casing is disposed.

Further, in an embodiment, the main casing has a main transmission mechanism, and the lower casing has a sewing platform; the transverse joint has a synchronization with the rotation of the main transmission mechanism. a driving mechanism, and a coordinated transmission mechanism directly above the lower casing and driven by the synchronous driving mechanism; wherein the main transmission mechanism has a main shaft, and the coordinated transmission mechanism has a cooperating shaft.

Further, in an embodiment, the synchronous driving mechanism includes a transmission wheel disposed on the main shaft, a passive wheel disposed on the coordination shaft, and a driving wheel and the driven wheel. A belt that rotates the drive wheel in synchronization with the driven wheel.

Further, in an embodiment, the synchronous driving mechanism includes a transmission wheel disposed on the main shaft, a passive wheel disposed on the coordination shaft, and a driving wheel and the driven wheel. a linkage gear that rotates the transmission wheel in synchronization with the driven wheel.

Further, in an embodiment, the synchronous driving mechanism includes a passive wheel disposed on the cooperative shaft, and a servo motor disposed inside the lateral connecting portion, and the servo motor is connected to drive the The driving wheel can be rotated synchronously with the spindle.

Further, in an embodiment, the bottom of the cooperative transmission mechanism is provided with a bottom line dispenser.

Further, in an embodiment, the sewing platform end has a sewing area, and a bottom line swinging member and a hook tooth are respectively disposed inside the lower casing of the sewing area, and the supporting shaft The upper link has a connecting rod for driving the bottom line swinging member and the hook tooth.

According to the technical solution of the present invention described above, the present invention has the following substantially beneficial effects compared with the prior art: 1. The present invention provides the structure of the crank-arm sewing machine in which the user can maintain a good sitting posture, so that the user can easily Directly to the sewing area to maintain the health of the user and to achieve a safer working purpose when sewing, it has overcome the long-standing structural bias of the outer structure of the curved arm sewing machine. And the technical bias of its internal organization configuration, and adopting the technical solution that the structural change of the outer structure is abandoned due to technical bias to solve the long-standing problems in the prior art, so as to achieve the purpose of meeting the actual needs of the user; The bottom line dispenser also provides an optimal position for the user to wear the bottom line or the maintenance process, so that the user can easily and easily re-thread the bottom line, and the line can be more easily The cam is unloaded to remove the entangled bottom line more quickly, and it has indeed overcome the common knowledge of this technical field for a long time. The technical prejudice of the bottom line dispenser mounting position is deep and tamped, and the technical solution of the bottom line dispenser mounting position changed by the technical bias is used to solve the long-standing problem in the prior art to achieve the use. The purpose of the actual needs.

The preferred examples and technical contents of this creation are as follows: First, please refer to "Figure 3" to "Figure 7", which is the same angle appearance and use of the first preferred embodiment of the present invention. The appearance, the appearance of the user's perspective, the internal local structure and its schematic plan view. As is apparent from the drawings, the present invention provides a crank-arm sewing machine structure 20 which is fixed to a table top by a base 100, the arm-type sewing machine structure 20 including at least one main a casing 30 and a lower casing 50 located below the main casing 30; wherein an inner side of the main casing 30 and the lower casing 50 are obliquely extended from an inner side of the main casing 30 Connecting to the lateral joint portion 40 of the lower casing 50; it is worth mentioning that the main casing 30 has a main transmission mechanism 31, and the lower casing 50 has a sewing platform 51 thereon. The bottom of the slotting platform 51 has a slotted area 60, and a bottom line swinging member 52 and a hooking tooth 53 are respectively disposed inside the lower housing 50 of the sewing area 60, and the supporting shaft 421 is coupled with a driving a bottom line swinging member 52 and a connecting rod 422 for operating the hook tooth 53; and the lateral connecting portion 40 has a synchronous driving mechanism 41 synchronized with the rotation of the main transmission mechanism 31, and a right side of the lower casing 50 and a coordinated transmission mechanism 42 driven by the synchronous driving mechanism 41; wherein the main transmission mechanism 31 has a main The shaft 311 is driven by a driving motor 80 disposed at the end of the spindle 311, and the cooperative transmission mechanism 42 has an associated shaft 421. The synchronous driving mechanism 41 includes a shaft 311 disposed on the spindle 311. The transmission wheel 411, a driven wheel 412 disposed on the cooperating shaft 421, and a belt 413 disposed between the transmission wheel 411 and the driven wheel 412 and rotating the transmission wheel 411 in synchronization with the driven wheel 412. It is to be noted that a bottom line dispenser 70 is disposed at the end of the coordinated transmission mechanism 42. For the related structure and function of the bottom thread dispenser 70, refer to the specification of the "Threading Cam Device of the Sewing Machine" of TW Patent Publication No. M508561. It will not be repeated here. In summary, it can be clearly seen that the present invention provides the crank-arm sewing machine structure 20 in which the user can maintain a good sitting posture, allowing the user to directly look directly into the sewing area to maintain the user's health and to the user. A safer work can be achieved during sewing, which has overcome the long-standing sturdy outer casing structural design bias in this technical field, and the technical bias of its internal mechanical configuration, and the use of structural changes that have been abandoned due to technical bias. The technical solution to solve the long-standing problems in the prior art to achieve the purpose of meeting the actual needs of the user; the present invention also has the bottom line dispenser 70, which provides the user with a bottom line or maintenance treatment. The best position makes it easier and more convenient for the user to re-thread the bottom line, and it is easier to remove the lift cam to clear the twisted bottom line more quickly, which overcomes the technical field. A technical prejudice that has long been stenciled by the general knowledge of the bottom line dispenser 70 and has been abandoned due to technical bias. The bottom line dispenser 70 installed position change of the technical solution to be addressed long-term problems of the prior art, in order to achieve the purpose of compliance with the actual needs of the user.

Please also refer to FIG. 8 for an isometric view of the appearance and internal partial structure of the second preferred embodiment of the present invention. As shown in the figure, the difference between the second preferred embodiment of the present invention and the first preferred embodiment of the present invention is that the synchronous driving mechanism 41 includes a transmission wheel 411 disposed on the spindle 311. A driven wheel 412 disposed on the cooperating shaft 421, and a linking gear 414 disposed between the transmitting wheel 411 and the driven wheel 412 and rotating the transmission wheel 411 in synchronization with the driven wheel 412.

Finally, please refer to the same angle diagram of the appearance and internal partial structure of the third preferred embodiment as shown in FIG. As shown in the figure, the third preferred embodiment of the present invention is different from the second preferred embodiment of the present invention in that the synchronous driving mechanism 41 includes a The driven wheel 412 of the cooperating shaft 421 and a servo motor 415 disposed inside the lateral connecting portion 40 are coupled to drive a driving wheel 416 for rotating the driven wheel 412 in synchronization with the main shaft 311.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. And modifications are still within the scope of the patents of the present invention.

10‧‧‧ Existing curved arm sewing machine

100‧‧‧ machine base

11‧‧‧Host shell

12‧‧‧ Lower case

121‧‧‧Sewing platform

13‧‧‧Sewing area

20‧‧‧Curved arm sewing machine structure

30‧‧‧Host shell

31‧‧‧Main drive mechanism

311‧‧‧ Spindle

40‧‧‧Horizontal link

41‧‧‧Synchronous driving mechanism

411‧‧‧Drive wheel

412‧‧‧passive wheel

413‧‧‧Land

414‧‧‧ linkage gear

415‧‧‧Servo motor

416‧‧‧Drive wheel

42‧‧‧Cooperative transmission

421‧‧‧Coordination axis

422‧‧‧ Connecting rod

50‧‧‧ Lower case

51‧‧‧Sewing platform

52‧‧‧Bottom line swinging parts

53‧‧‧ hook teeth

60‧‧‧Sewing area

70‧‧‧Bottom line dispenser

80‧‧‧Drive motor

Fig. 1 is a schematic view showing the use of a conventional crank-type sewing machine. Fig. 2 is a perspective view showing the appearance of a user's conventional arm-type sewing machine in Fig. 1; FIG. 3 is a schematic view showing the appearance of an isometric view according to a first preferred embodiment of the present invention. Fig. 4 is a schematic view showing the use of "Fig. 3" of the present invention. FIG. 5 is a schematic view showing the appearance of a user's perspective of FIG. 4 of the present invention. Fig. 6 is a schematic view showing the internal structure of Fig. 3 of the present invention. Fig. 7 is a top plan view showing the "Fig. 6" of the present invention. Figure 8 is a schematic isometric view of the appearance and internal partial structure of the second preferred embodiment of the present invention. Figure 9 is an isometric view of the appearance and internal partial structure of a third preferred embodiment of the present invention.

100‧‧‧ machine base

20‧‧‧Curved arm sewing machine structure

30‧‧‧Host shell

40‧‧‧Horizontal link

50‧‧‧ Lower case

51‧‧‧Sewing platform

52‧‧‧Bottom line swinging parts

53‧‧‧ hook teeth

60‧‧‧Sewing area

80‧‧‧Drive motor

Claims (4)

A crank arm type sewing machine structure (20) comprising at least a main body casing (30) and a lower casing (50) located below the main casing (30); Between the main casing (30) and the lower casing (50), a transverse joint portion that is obliquely extended from the inner side of one end of the main casing (30) to the lower casing (50) is provided ( 40), the main casing (30) has a main transmission mechanism (31), the main transmission mechanism (31) has a main shaft (311), and the lower casing (50) has a sewing platform ( 51), the sewing platform (51) has a sewing area (60) at the end, and a bottom line swinging member (52) is respectively disposed inside the lower casing (50) of the sewing area (60). a hook tooth (53), the lateral joint portion (40) has a synchronous driving mechanism (41) synchronized with the rotation of the main transmission mechanism (31), and a directly above the lower casing (50) And a coordinated transmission mechanism (42) driven by the synchronous driving mechanism (41), the coordinated transmission mechanism (42) has a cooperating shaft (421) and a rear end of the cooperative transmission mechanism (42) a bottom line dispenser (70) on the cooperating shaft (421) A bottom junction of the oscillating drive member (52) with the operation of hook tooth (53) of the rod (422). The arm-type sewing machine structure according to claim 1, wherein the synchronous driving mechanism (41) includes a transmission wheel (411) disposed on the main shaft (311), and a synchronization shaft a passive wheel (412) of (421), and a belt (413) disposed between the transmission wheel (411) and the driven wheel (412) and rotating the transmission wheel (411) in synchronization with the driven wheel (412). ). The arm-type sewing machine structure according to claim 1, wherein the synchronous driving mechanism (41) includes a transmission wheel (411) disposed on the main shaft (311), and a synchronization shaft a passive wheel (412) of (421), and a linkage gear disposed between the transmission wheel (411) and the driven wheel (412) and rotating the transmission wheel (411) synchronously with the driven wheel (412) ( 414). The articulated arm sewing machine structure according to claim 1, wherein the synchronous driving mechanism (41) includes a driven wheel (412) disposed on the cooperative shaft (421), and a Horizontal connection A servo motor (415) inside the knot (40), the servo motor (415) is coupled to drive a drive wheel (416) for rotating the driven wheel (412) in synchronization with the spindle (311).