CN213295731U

CN213295731U - Press lifting device for sewing machine

Info

Publication number: CN213295731U
Application number: CN202021588400.6U
Authority: CN
Inventors: 林圣智; 谢尚倍; 高圣林
Original assignee: Kaulin Manufacturing Co Ltd
Current assignee: Kaulin Manufacturing Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-05-28
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a presser lifting device for a sewing machine, which comprises an actuator, a lifting arm, a presser foot mechanism and a lifting mechanism, wherein the actuator comprises an actuating rod; the lifting arm is provided with a pivoting part, a driven part and an abutting part, the pivoting part is pivoted on the machine body, and the driven part is configured corresponding to the actuating rod and driven; the presser foot mechanism comprises a presser bar and a sleeve fastener arranged on the presser bar; the lifting mechanism comprises a swinging element, a rotating element, a pull rod and a presser foot lifting piece, wherein the swinging element and the rotating element are pivoted on the machine body, the swinging element is provided with an extension arm, the pull rod is connected with the swinging element and the rotating element, and the presser foot lifting piece is connected with the rotating element and is configured corresponding to the sleeve fastener; therefore, the existing related mechanisms and elements do not need to be changed, and the use cost can be greatly reduced.

Description

Press lifting device for sewing machine

Technical Field

The utility model relates to a sewing machine's technique indicates a tamp lifting device for sewing machine especially.

Background

With the advancement and improvement of industrial technologies, it is obvious that a manual or knee press lifting device which is manually operated has been provided, and the use requirements at the present stage cannot be met, and thus, related manufacturers have developed various electric press lifting devices successively.

However, existing motorized press lifting devices are either bulky or noisy, wherein the bulky size not only increases packaging and transportation costs, but also allows the limited space of the operator to be greatly occupied; prolonged periods of high noise can cause tinnitus or related maladies to the operator at the site. In addition, a part of electric pressing tool lifting devices are arranged, so that the original transmission mechanism is greatly changed, and the use cost of the electric pressing tool lifting device is high.

In view of this, the inventor of the present invention is therefore interested in studying the above-mentioned shortcomings of the prior art and cooperating with the application of the theory to solve the above-mentioned problems as much as possible, so as to achieve the improved objective of the inventor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tamp lifting device for sewing machine, it borrows by the setting of lifting arm, need not change current relevant mechanism and component, and then reduction use cost that can be by a wide margin.

In order to achieve the above object, the present invention provides a presser lifting device for a sewing machine, the sewing machine having a machine body, the presser lifting device including an actuator, a lifting arm, a presser foot mechanism and a lifting mechanism, the actuator including an actuating rod capable of reciprocating; two ends of the lifting arm are respectively provided with a pivoting part and a driven part, an abutting part is arranged between the pivoting part and the driven part, the pivoting part is pivoted on the machine body, and the driven part is configured corresponding to the actuating rod and driven; the presser foot mechanism comprises a presser bar penetrating through the machine body and a set of fixing piece arranged on the presser bar; the lifting mechanism comprises a swinging element, a rotating element, a pull rod and a presser foot lifting piece, wherein the swinging element and the rotating element are respectively pivoted on the machine body, the swinging element is provided with an extension arm which is configured corresponding to the abutting part, two ends of the pull rod are respectively connected with the swinging element and the rotating element, and the presser foot lifting piece is connected with the rotating element and is configured corresponding to the set of fixing pieces; when the lifting arm is actuated by the actuating rod, the abutting part pushes up the extension arm, and simultaneously drives the pull rod to enable the rotating element to rotate and swing, and the rotating element drives the presser foot lifting piece to move upwards, so that the sleeve fixing piece and the pressing rod are lifted upwards.

The body is provided with a cavity, the actuator further comprises a motor part for the actuation rod to be connected in a penetrating manner, and the motor part is fixed on the body and is hidden in the cavity.

The pivot part is provided with a first pivot hole for a first bolt to penetrate and pivot on the machine body.

Wherein, the driven part is provided with a roller which is arranged corresponding to the end part of the actuating rod.

Wherein, the abutting part is an inclined plate to push and lift the end part of the extension arm.

The presser foot mechanism also comprises a compression spring, an elastic force adjusting bolt and a presser foot, the compression spring is elastically clamped between the pressing rod and the elastic force adjusting bolt, the elastic force adjusting bolt is locked on the machine body, and the presser foot is connected with the bottom end of the pressing rod.

The swinging element is L-shaped, a second pivot hole is arranged in the middle of the swinging element, and a second bolt penetrates through the second pivot hole and is pivoted on the machine body.

The end of the swinging element far away from the extension arm is provided with a first screw hole, and one end of the pull rod is locked by a screw fixing element through the first screw hole.

The rotating element includes a T-shaped plate, a third pivot hole and a connecting hole are respectively arranged at two ends of the transverse part of the T-shaped plate, a second screw hole is arranged at the end part of the longitudinal part of the T-shaped plate, a third bolt is arranged in the third pivot hole in a penetrating way and is pivoted on the machine body, and the second screw hole is used for locking the other end of the pull rod through a screw fixing element.

The manual pressure raising mechanism comprises a manual trigger, a shaft lever and a cam, wherein the shaft lever is connected with the machine body in a penetrating manner, the manual trigger and the cam are connected to two ends of the shaft lever, the manual trigger is formed outside the machine body, and the cam is formed inside the machine body and is positioned on one side of the rotating element.

The knee-moving pressure-lifting device mechanism comprises a knee-moving ejector rod, the extension arm is provided with a through hole, and one end of the knee-moving ejector rod is connected in the through hole in a penetrating manner.

The utility model discloses still have following efficiency, borrow by the actuator and hide into the appearance intracavity portion of organism, can reduce the actuating lever and remove the produced high noise of in-process. Since the actuator does not protrude outside the body, control can be effectively achieved both in packaging material and transportation costs. Moreover, the abutting part is provided with the inclined plate, so that the moving stroke of the extension arm can be increased, and the effect of saving labor can be achieved. Furthermore, the space for the operator is greatly improved.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is an appearance view of the presser lifting device assembly for a sewing machine of the present invention.

Fig. 2 is a perspective view of the press lifting device of the present invention.

Fig. 3 is a front view of the combination of the presser lifting device of the present invention.

Fig. 4 is a perspective view of the lifting arm of the present invention.

Fig. 5 is a diagram showing the use state of the presser lifting device of the present invention applied to a sewing machine.

Wherein, the reference numbers:

10 actuator

11 motor part

12 actuating lever

20 lifting arm

21 a pivoting part

211 a first pivot hole

22 passive part

221 roller

23 abutting part

24 first bolt

30 presser foot mechanism

31 pressing rod

32 sleeve fastener

33: compression spring

34 elastic force adjusting bolt

35 presser foot

40 lifting mechanism

41 oscillating element

411 extension arm

412 the second pivot hole

413 through hole

414 first screw hole

415 second bolt

42 rotating element

420: T-shaped plate

421 the third pivot hole

422 connecting hole

423 second screw hole

424 arc-shaped groove

43 pull rod

44 presser foot lifting/lowering member

45: third bolt

46 fourth bolt

50: manual pressure lifting tool mechanism

51 hand-operated trigger

52 shaft lever

53 cam

60 knee-moving pressure-lifting tool mechanism

61 knee-moving ejector rod

8, sewing machine

81: machine body

A is a containing cavity

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

Referring to fig. 1 to 4, the present invention provides a presser lifting device for a sewing machine, wherein the sewing machine 8 has a body 81, a rear section of the body 81 has a cavity a, and the presser lifting device mainly includes an actuator 10, a lifting arm 20, a presser foot mechanism 30 and a lifting mechanism 40.

The actuator 10 is accommodated in the cavity a of the housing 81, and may be an electromagnetic valve, but not limited to this type, and may also be an air cylinder or an oil cylinder, the actuator 10 mainly includes a motor part 11 and an actuating rod 12, the motor part 11 is fixed to the housing 81 and is hidden inside the cavity a, and mainly includes related elements such as a winding set and a conducting wire, the actuating rod 12 is made of silicon steel, and is penetrated through the center of the motor part 11, and can drive the actuating rod 12 to generate a reciprocating linear movement relative to the motor part 11 after the conducting wire is energized and the winding set is excited.

Referring to fig. 3, two ends of the lifting arm 20 are respectively formed with a pivot portion 21 and a driven portion 22, a top portion 23 is disposed between the pivot portion 21 and the driven portion 22, the pivot portion 21 is formed with a first pivot hole 211 for a first bolt 24 to pass through and pivotally connected to the body 81, the driven portion 22 is formed with a roller 221, and the roller 221 is disposed corresponding to the end of the actuating rod 12. The abutting portion 23 of the present embodiment is a sloping plate.

The presser foot mechanism 30 mainly includes a presser bar 31 and a fixing member 32, the presser bar 31 is connected to the body 81 in a penetrating manner or is connected to the body 81 through a shaft sleeve (not shown), the fixing member 32 in this embodiment is a collar, which is sleeved and fixed on the upper portion of the presser bar 31. The presser foot mechanism 30 further includes a compression spring 33, an elastic force adjusting bolt 34 and a presser foot 35, the compression spring 33 is elastically clamped between the pressing bar 31 and the elastic force adjusting bolt 34, the elastic force adjusting bolt 34 is locked on the machine body 81 to adjust the pressing force of the pressing bar 31 according to various use conditions, and the presser foot 35 is connected to the bottom end of the pressing bar 31.

The lifting mechanism 40 mainly includes a swinging element 41, a rotating element 42, a pull rod 43 and a presser foot lifting/lowering member 44, the swinging element 41 and the rotating element 42 are respectively pivoted on the machine body 81, the swinging element 41 is substantially L-shaped and has an extending arm 411, a second pivot hole 412 is disposed at the middle position of the swinging element 41, a through hole 413 is disposed at the end of the extending arm 411 far away from the second pivot hole 412, and a first screw hole 414 is disposed at the end of the extending arm 411 far away from the extending arm 411, wherein the second pivot hole 412 is used for a second bolt 415 to pass through and is pivoted on the machine body 81, and the first screw hole 414 is used for one end of the pull rod 43 and is locked by a screw element (not shown).

The rotating element 42 mainly includes a T-shaped plate 420, two ends of the transverse portion of the T-shaped plate 420 are respectively provided with a third pivot hole 421 and a connecting hole 422, an end of the longitudinal portion is provided with a second screw hole 423, the third pivot hole 421 is used for a third bolt 45 to pass through and pivotally connect to the machine body 81, and the second screw hole 423 is used for the other end of the pull rod 43 to be locked by a screw element. An arc-shaped slot 424 is disposed at a position of the longitudinal portion adjacent to the transverse portion, and the arc-shaped slot 424 is used for receiving a fourth bolt 46 after passing through the body 81.

The presser foot lifter 44 is connected to the connecting hole 422 of the rotating member 42 by a fixing member such as a rivet or a screw, and is disposed corresponding to the position of the cover fixing member 32.

Further, the utility model discloses a tamp lifting device for sewing machine still includes a manual tamp mechanism 50 of lifting, and it mainly includes a manual trigger 51, a shaft lever 52 and a cam 53, and the cross-under organism 81 of shaft lever 52, manual trigger 51 and cam 53 then connect two ends at shaft lever 52, and wherein manual trigger 51 forms in the outside of organism 81, and cam 53 forms in the inside of organism 81 and is located a side of aforementioned T shaped plate piece 420, borrows by the operation of pulling through manual trigger 51, and it produces rotatory swing to push T shaped plate piece 420 with cam 53, and then drives cover firmware 32 and pressure bar 31 and do the lifting that makes progress.

Further, the utility model discloses a presser lifting device for sewing machine still includes that a knee moves and lifts presser mechanism 60, and it mainly includes a knee and moves ejector pin 61, and this knee moves the one end of ejector pin 61 and is worn to connect in the through-hole 413 of aforementioned extension arm 411, borrows by the promotion to knee and moves ejector pin 61, will make spinner 42 produce rotatory swing, drives presser foot lift 44 through spinner 42 and shifts up, and then drives cover firmware 32 and the ascending lifting of pressure stick 31.

Referring to fig. 5, when the actuating rod 12 pushes the lifting arm 20 upwards, the lifting arm 20 will rotate upwards with the first pivot hole 211 as the center of rotation, and the top 23 will push the extending arm 411 to rotate clockwise, and at the same time drive the pull rod 43 to make the rotating element 42 rotate and swing counterclockwise with the second pivot hole 412 as the center of rotation, and drive the presser foot lifting piece 44 to move upwards with the rotating element 42, so as to lift the sleeve 32 and the presser bar 31 upwards.

Of course, the present invention can have other embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the claims of the present invention.

Claims

1. A presser lifting device for a sewing machine having a machine body, characterized by comprising:

an actuator including an actuator rod capable of reciprocating;

a lifting arm, two ends of which are respectively provided with a pivot part and a driven part, a butting part is arranged between the pivot part and the driven part, the pivot part is pivoted on the machine body, and the driven part is configured corresponding to the actuating rod and driven;

the presser foot mechanism comprises a presser bar penetrating through the machine body and a set of fixing piece arranged on the presser bar; and

a lifting mechanism, including a swinging element, a rotating element, a pull rod and a presser foot lifting piece, wherein the swinging element and the rotating element are respectively pivoted on the machine body, the swinging element is provided with an extension arm configured corresponding to the abutting part, two ends of the pull rod are respectively connected with the swinging element and the rotating element, and the presser foot lifting piece is connected with the rotating element and configured corresponding to the set of fixing piece;

when the lifting arm is actuated by the actuating rod, the abutting part pushes up the extension arm, and simultaneously drives the pull rod to enable the rotating element to rotate and swing, and the rotating element drives the presser foot lifting piece to move upwards, so that the sleeve fixing piece and the pressing rod are lifted upwards.

2. The presser lifting device for sewing machines of claim 1, wherein said body has a cavity, and said actuator further comprises a motor member for passing said actuating rod therethrough, said motor member being fixed to said body and recessed within said cavity.

3. The presser lifting device for sewing machine as claimed in claim 1, wherein the pivot portion has a first pivot hole for a first bolt to pass through and pivot on the machine body.

4. The presser lifting device for a sewing machine according to claim 3, wherein the driven portion is provided with a roller disposed corresponding to an end of the actuating lever.

5. The presser lifting device for sewing machines as claimed in claim 1, wherein the abutting portion is a sloping plate for pushing up the end of the extension arm.

6. The presser lifting device for sewing machine as claimed in claim 1, wherein the presser mechanism further comprises a compression spring elastically clamped between the presser bar and the elastic force adjusting bolt, and a presser foot connected to the bottom end of the presser bar.

7. The presser lifting device for sewing machine as claimed in claim 1, wherein the swinging member is L-shaped, and a second pivot hole is formed at a middle position of the swinging member, and a second bolt is inserted through the second pivot hole and pivotally connected to the body.

8. The presser lifting device for sewing machines as claimed in claim 7, wherein the swinging member has a first screw hole formed at an end portion thereof remote from the extension arm, the first screw hole being provided for an end of the pull rod and being locked by a screw member.

9. The presser lifting device for sewing machine as claimed in claim 8, wherein the rotating member comprises a T-shaped plate, two ends of the transverse portion of the T-shaped plate are respectively provided with a third pivot hole and a connecting hole, the end of the longitudinal portion of the T-shaped plate is provided with a second screw hole, the third pivot hole is provided for a third bolt to pass through and is pivotally connected to the machine body, and the second screw hole is provided for the other end of the pull rod to be locked by a screw member.

10. The presser lifting device for sewing machine as claimed in claim 1, further comprising a manual presser lifting mechanism, said manual presser lifting mechanism comprising a manual trigger, a shaft and a cam, said shaft is connected to said machine body, said manual trigger and said cam are connected to two ends of said shaft, said manual trigger is formed on the outside of said machine body, said cam is formed on the inside of said machine body and is located on one side of said rotating member.

11. The presser lifting device for sewing machine according to claim 1, further comprising a knee-operated presser lifting mechanism, wherein the knee-operated presser lifting mechanism comprises a knee-operated push rod, the extension arm defines a through hole, and one end of the knee-operated push rod is inserted into the through hole.