TWM492327U - Foot presser control mechanism of sewing machine - Google Patents

Description

Presser foot control mechanism of sewing machine

The present invention relates to a presser foot control mechanism, and more particularly to a presser foot control mechanism of a small and simple design sewing machine.

Nowadays, the general sewing machine is equipped with a presser foot. The function of the presser foot is to press the fabric to be sewn while the sewing machine is working on the sewing to keep it flat without wrinkles. When the next fabric to be sewn is to be laid after the sewing of the fabric to be sewn, the user needs to raise the presser foot to a certain height through the internal control mechanism of the sewing machine, so that the fabric to be sewn is not pressed by the presser foot and can be pumped. From the work table of the sewing machine.

For example, the inner presser device of the sewing machine of the Republic of China Patent Invention Patent No. I384101 mainly includes an inner presser foot lifting cam, an inner presser foot raising member, an inner pressing rod and an inner pressing leg. Specifically, the inner presser foot lifting cam can interlock the inner presser foot rising member through the contour thereof, and the inner presser foot rising member performs the yaw to raise or lower the inner presser foot to the inner presser foot height or the retracted height position. Accordingly, the inner presser device of the sewing machine can lift the inner presser foot away from the fabric only after the sewing is completed. However, the volume of the inner presser foot lifting cam and the inner presser foot raising member of the inner presser device of the sewing machine is too large and the overall volume of the sewing machine cannot be effectively reduced. In addition, the contour of the inner presser foot cam is also subject to strict design. Therefore, how to better design a small and simple design of the lift-up foot mechanism has become an urgent problem to be solved.

The main purpose of this creation is to solve the problem of the complicated design of the conventional lifting presser mechanism and the inability to effectively reduce the volume.

In order to achieve the above object, the present invention provides a presser foot control mechanism for a sewing machine, which is mounted on a casing of a sewing machine. The presser foot control mechanism of the sewing machine includes a drive unit, a lifting unit and a presser foot unit. The driving unit is disposed in the housing, and includes a solenoid valve, and a driving rod pivotally connected to the electromagnetic valve and driven by the electromagnetic valve to perform a reciprocating displacement stroke. The lifting unit is disposed in the housing and is in a grouping relationship with the driving unit, and the lifting unit includes a linkage with the driving rod to generate a yaw stroke when the driving rod performs the reciprocating displacement stroke. a transmission rod, and a lifting member assembled with the transmission rod and performing a lifting stroke when the transmission rod performs the yaw stroke, wherein the lifting member performs an operation direction of the lifting stroke and the driving rod The direction of actuation of the reciprocating displacement stroke is parallel. The presser foot unit is assembled with the lifting unit, and includes a transmission shaft, an actuating member disposed on the transmission shaft and disposed at a position of the lifting member and being pushed by the pulling member in the lifting stroke And a presser foot connected to an end of the drive shaft and normally pressed against a workpiece to be sewn while the lifting stroke is released.

In one embodiment, the transmission rod includes a first connecting portion connected to the driving rod and pivoted to the housing and yawed relative to the housing during the yaw stroke, and is connected to the first connecting portion. And a second connecting section that is yawed relative to the housing by the first connecting section, and is connected to the second connecting section and the lifting component and pivoted to the housing The second connecting section is interlocked to deflect the housing relative to the yaw stroke to lift the third connecting section of the lifting member.

In an embodiment, the yaw direction of the first connecting segment and the third connecting segment are different.

In one embodiment, the lifting member includes a pushing end disposed facing the actuating member and abutting the actuating member at the lifting stroke.

In one embodiment, the presser foot unit includes a guide block extendingly coupled to the actuating member and engaging the housing to limit the direction of movement of the presser foot unit during the lifting stroke.

In an embodiment, the driving rod is disposed in a direction parallel to the direction in which the drive shaft is disposed.

In one embodiment, the lifting member includes a guide slot for a pivoting portion of a loosening mechanism to restrict the direction of actuation of the lifting stroke.

In one embodiment, the drive shaft includes an interlocking rod for arranging the actuating member and the presser foot, and a sleeve provided with the linkage rod and fixed to the housing.

In one embodiment, the driving unit includes a stroke adjusting member disposed on the housing for changing a distance of the driving rod to perform the reciprocating displacement stroke.

With the above structure of the present creation, the following features are compared with the conventional structure: 1. This creation can easily control the movement of the presser foot unit simply by controlling the drive unit. At the same time, the presser foot control mechanism of the sewing machine has the advantages of small size and simple design compared with the conventional design using the foot pedal driving presser foot, and thus has greater convenience. 2. The driving direction of the driving rod is the direction of vertical movement of the sewing machine, and it is also parallel to the moving direction of the presser foot unit. Therefore, the interlocking design between the driving unit and the presser foot unit is relatively simple.

The detailed description and technical content of this creation are as follows:

Referring to FIG. 1, FIG. 2 and FIG. 3-1, the present invention is a presser foot control mechanism of a sewing machine which is assembled to a casing 101 of a sewing machine 100. The presser foot control mechanism of the sewing machine comprises a drive unit 1, a lift unit 2 and a presser foot unit 3. The driving unit 1 is disposed in the housing 101 and includes a solenoid valve 11 , a driving rod 12 pivotally connected to the electromagnetic valve 11 and driven by the electromagnetic valve 11 , and a driving rod 12 disposed on the housing 101 for limiting The stroke adjustment member 13 of the drive rod 12. In an embodiment, the driving unit 1 can be a linear motor or a stepping motor. The lifting unit 2 is disposed in the housing 101 and is in a grouping relationship with the driving unit 1 , and includes a transmission rod 21 coupled to the driving rod 12 and coupled to the driving rod 12 , and a transmission rod 21 sets of pull-up members 22 that are connected by the transmission rod 21. The transmission rod 21 includes a first connecting portion 211 pivotally connected to the housing 101 and coupled to the driving rod 12 and coupled to the driving rod 12, and is connected to the first connecting portion 211 and subjected to the first a second connecting section 212 connected to the connecting section 211 and a third connecting section 213 pivotally connected to the housing 101 and connected to the second connecting section 212 and the lifting member 22 and linked by the second connecting section 212 . The lifting member 22 includes a pushing end 221 disposed away from the third connecting portion 213 and a guiding slot 222 defined therein. The guiding slot 222 can provide a pivoting portion 41 of the loosening mechanism 4 to pass through. The presser foot unit 3 is assembled with the lifting unit 2, and includes a transmission shaft 31, and an actuating member 32 disposed on the transmission shaft 31 and facing the lifting member 22 to face the pushing end 221 A presser foot 33 connected to one end of the drive shaft 31, and a guide block 34 extendingly coupled to the actuating member 32. The transmission shaft 31 includes an interlocking rod 311 for arranging the actuating member 32 and the pressing leg 33, and a sleeve 312 provided with the connecting rod 311 and fixed to the casing 101. It should be noted here that the direction in which the drive rod 12 is disposed is parallel to the direction in which the drive shaft 31 is disposed.

Referring to FIG. 3-1, the presser foot 33 of the presser foot unit 3 is normally pressed against a workpiece 5 to be sewed. Referring to FIG. 3-2, when the user wants to move the object to be sewed 5, the user must raise the presser foot 33 of the presser foot unit 3 to release the presser foot 33. Further, when the solenoid valve 11 is driven by a switch (not shown), the drive rod 12 is controlled by the solenoid valve 11 to perform a reciprocating displacement stroke perpendicular to the sewing machine 100 with respect to the housing 101. The first connecting section 211, the second connecting section 212 and the third connecting section 213 of the transmission rod 21 perform a yaw stroke. The first connecting section 211, the second connecting section 212, and the third connecting section 213 are respectively yawed relative to the housing 101 in the yaw stroke, and the first connecting section 211 and the third The yaw direction of the connecting section 213 is different. At the same time, the first connecting section 211, the second connecting section 212 and the third connecting section 213 of the transmission rod 21 respectively perform the yaw stroke with respect to the housing 101 and the third connecting section 213 lifts the pulling When the member 22 is lifted, the lifting member 22 performs a lifting stroke with respect to the housing 101. The lifting member 22 moves in a direction parallel to the movement of the driving rod 12 by the guiding groove 222 and the pivoting portion 41 and the guiding and guiding of the guiding block 34 and the housing 101. In other words, the direction in which the lifting member 22 performs the lifting stroke and the direction in which the driving rod 12 performs the reciprocating displacement stroke are parallel to each other, that is, perpendicular to the sewing machine 100. Finally, the pushing end 221 of the lifting member 22 abuts the actuating member 32 in the lifting stroke, and then the connecting rod 311 is moved to the sleeve 312, and simultaneously lifts the pressing leg 33 away from the waiting portion. The sewing material 5 releases the object to be sewed 5. Accordingly, the user only needs to simply control the drive unit 1 to control the presser foot unit 3 during the sewing process to rotate or move the cloth in response to different sewing techniques or conditions of use. Further, the relative distance between the stroke adjusting member 13 and the solenoid valve 11 can be changed by adjusting the stroke adjusting member 13. In other words, when the stroke adjusting member 13 is moved toward the solenoid valve 11 such that its distance from the solenoid valve 11 is shortened, the stroke adjusting member 13 can restrict the driving rod 12 from performing a short reciprocating displacement stroke while the transmission The yaw stroke of the lever 21 and the lifting stroke of the lifting member 22 are also shortened, so that the distance of the presser foot 33 from the object to be sewed 5 is also shortened. On the contrary, when the stroke adjusting member 13 moves away from the solenoid valve 11 so that the distance from the solenoid valve 11 increases, the stroke adjusting member 13 can provide a large moving space to make the driving rod 12 longer. The reciprocating displacement stroke, while the yaw stroke of the transmission rod 21 and the lifting stroke of the lifting member 22 also increase, so that the distance of the presser foot 33 from the object to be sewed 5 also increases.

The presser foot control mechanism of the sewing machine is assembled to a casing of a sewing machine, and includes a driving unit, a lifting unit and a presser foot unit. The driving unit is disposed in the housing, and includes a solenoid valve, and a driving rod pivotally connected to the electromagnetic valve and driven by the electromagnetic valve to perform a reciprocating displacement stroke. The lifting unit is disposed in the housing and is in a grouping relationship with the driving unit, and the lifting unit includes a linkage with the driving rod to generate a yaw stroke when the driving rod performs the reciprocating displacement stroke. a transmission rod, and a lifting member assembled with the transmission rod and performing a lifting stroke when the transmission rod performs the yaw stroke, wherein the lifting member performs an operation direction of the lifting stroke and the driving rod The direction of actuation of the reciprocating displacement stroke is parallel. The presser foot unit is assembled with the lifting unit, and includes a transmission shaft, an actuating member disposed on the transmission shaft and disposed at a position of the lifting member and being pushed by the pulling member in the lifting stroke And a presser foot connected to an end of the drive shaft and normally pressed against a workpiece to be sewn while the lifting stroke is released. Accordingly, the user can easily control the presser foot unit simply by controlling the drive unit. At the same time, the presser foot control mechanism of the sewing machine has the advantages of small size and simple design. Further, the moving direction of the driving lever is a direction of vertical movement in the sewing machine, and it is also parallel to the moving direction of the presser foot unit. Therefore, the interlocking design between the driving unit and the presser foot unit is relatively simple.

1‧‧‧Drive unit
11‧‧‧ solenoid valve
12‧‧‧ drive rod
13‧‧‧Travel adjustments
2‧‧‧lifting unit
21‧‧‧ Transmission rod
211‧‧‧First connection segment
212‧‧‧Second connection
213‧‧‧ third connection
22‧‧‧Lifting parts
221‧‧‧Pushing end
222‧‧
3‧‧‧ Presser unit
31‧‧‧Drive shaft
311‧‧‧ linkage rod
312‧‧‧ bushing
32‧‧‧actuation
33‧‧‧Foot presser
34‧‧‧Guiding block
4‧‧‧Songline mechanism
41‧‧‧ pivoting department
5‧‧‧Stolen goods
100‧‧‧ sewing machine
101‧‧‧shell

Fig. 1 is a schematic view showing the structural combination of the presser foot control mechanism and the sewing machine of the sewing machine of the present invention. Fig. 2 is a schematic structural view of the presser foot control mechanism of the sewing machine of the present invention. Figure 3-1 is a schematic diagram of the actuation of the presser foot control mechanism of the sewing machine of the present invention (1). Figure 3-2 is a schematic diagram of the actuation of the presser foot control mechanism of the sewing machine (2).

1‧‧‧Drive unit

11‧‧‧ solenoid valve

12‧‧‧ drive rod

21‧‧‧ Transmission rod

211‧‧‧First connection segment

212‧‧‧Second connection

213‧‧‧ third connection

22‧‧‧Lifting parts

31‧‧‧Drive shaft

311‧‧‧ linkage rod

312‧‧‧ bushing

32‧‧‧actuation

33‧‧‧Foot presser

34‧‧‧Guiding block

4‧‧‧Songline mechanism

41‧‧‧ pivoting department

Claims (9)

A presser foot control mechanism for a sewing machine is mounted on a casing of a sewing machine, and the presser foot control mechanism of the sewing machine comprises: a driving unit disposed in the casing, including a solenoid valve, and a pivoting valve a driving rod driven by the electromagnetic valve to perform a reciprocating displacement stroke; a lifting unit disposed in the housing and forming a grouping relationship with the driving unit, the lifting unit including a linkage with the driving rod And a driving rod that performs a yaw stroke when the driving rod performs the reciprocating displacement stroke, and a lifting rod that is assembled with the transmission rod and performs a lifting stroke when the transmission rod performs the yaw stroke, wherein The lifting member performs the lifting stroke in an operating direction parallel to the driving direction of the driving rod to perform the reciprocating displacement stroke; and a presser foot unit coupled to the lifting unit, including a transmission shaft, and a setting The transmission shaft is disposed on the position of the lifting member and is pushed by the lifting member in the lifting stroke, and an end connected to the driving shaft and is normally pressed A sewing material to be released to be sewn of the presser foot was in when the raising stroke. The presser foot control mechanism of the sewing machine of claim 1, wherein the transmission rod includes a first connecting portion connected to the driving rod and pivoted to the housing for yawing the housing during the yaw stroke a second connecting portion connected to the first connecting portion and coupled to the housing by the first connecting portion, and yawed with respect to the housing, and connected to the second connecting portion and the lifting member And pivoting to the third connection section of the housing that is interlocked with the housing by the second connecting section to yaw the yaw stroke to lift the lifting member. The presser foot control mechanism of the sewing machine according to claim 2, wherein the yaw direction of the first connecting section and the third connecting section are different. The presser foot control mechanism of the sewing machine according to claim 1 or 2, wherein the lifting member includes a pushing end disposed facing the actuating member and abutting the actuating member at the lifting stroke. The presser foot control mechanism of the sewing machine according to claim 1, wherein the presser foot unit includes a guide block extendingly coupled to the actuating member and engaging the housing in the lifting stroke to restrict a moving direction of the presser foot unit. The presser foot control mechanism of the sewing machine according to claim 1, wherein the driving rod is disposed in a direction parallel to the direction in which the drive shaft is disposed. The presser foot control mechanism of the sewing machine according to claim 1, wherein the pull member includes a guide groove for a pivoting portion of a loose thread mechanism to restrict a direction in which the lift stroke is actuated. The presser foot control mechanism of the sewing machine according to claim 1, wherein the drive shaft includes a linkage rod for arranging the actuating member and the presser foot, and a sleeve provided with the linkage rod and fixed to the housing. The presser foot control mechanism of the sewing machine of claim 1, wherein the drive unit comprises a stroke adjuster disposed on the housing for changing a distance of the drive rod to perform the reciprocating displacement stroke.