US 9,540,751 B2 · Sewing machine with a threading and air supply selecting device

Abstract

A sewing machine with a threading and air supply selecting device includes a base with a main shaft for driving at least one thread wiper, and a guiding pipe is provided on the thread wiper. On the base is further disposed an air supply device driven by a drive force source. Between the air supply source and he guiding pipe is disposed a pipe-moving device for moving the connecting pipe to the guiding pipe. A swing arm of a connecting rod assembly serves to control ON and Off of the air supply source. A directional positioning device is used to stop the main shaft from rotation, when the air supply source is working.

Drawings

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Drawings

Claims18

Dependent claims

A sewing machine with a threading and air supply selecting device comprising:

a base, a drive force source, a main shaft driven by the drive force source, at least one thread wiper driven by the main shaft, and a guiding pipe provided on the thread wiper, each of the guiding pipes having one end extended to a thread-inserting hole of the thread wiper, and another end fixed to a pipe-guiding frame of the thread wiper;
characterized in that:
the drive force source driving an air supply device, between the air-supply device and the pipe-guiding frames is disposed a pipe-moving device which includes a pipe-moving frame and a connecting pipe mounted on the pipe-moving frame and connected to the air supply device, the pipe-moving frame is provided at one end thereof with a main guiding member, a position where the main guide member moves to a connection between the connecting pipe and the guiding pipe is defined as a first position, and a position where the main guiding member moves away from the connection between the connecting pipe and the guiding pipe is defined as a second position;
and
the main guiding member has one end connected to one end of a swing arm, another end of the swing arm is abutted against an air-supply clutch, the air-supply clutch is disposed on a power shaft of the drive force source, the swing arm, when in the first position, controls the air-supply clutch to transmit a drive force of the power shaft to the air supply device, or, the swing arm, when in the second position, controls the air-supply clutch to stop transmitting the drive force of the power shaft to the air supply device.

2 more elements

A sewing machine with a threading and air supply selecting device comprising:

a base, a drive force source, a main shaft driven by the drive force source, at least one thread wiper driven by the main shaft, and a guiding pipe provided on the thread wiper, each of the guiding pipes having one end extended to a thread-inserting hole of the thread wiper, and another end fixed to a pipe-guiding frame of the thread wiper;
characterized in that:
an air supply device;
a pipe-moving device is disposed at the pipe-guiding frames and includes a pipe-moving frame and a connecting pipe mounted on the pipe-moving frame and connected to the air supply device, the pipe-moving frame is provided at one end thereof with a main guiding member, a position where the main guide member moves to a connection between the connecting pipe and the guiding pipe is defined as a first position, and a position where the main guiding member moves away from the connection between the connecting pipe and the guiding pipe is defined as a second position, the air supply device supplies air to the connecting pipe in the first position;
and
between the main guiding member and the main shaft is disposed a directional positioning device, the main guiding member includes a guiding edge with height difference, the guiding edge has a first end and a second end lower than the first end, the directional positioning device includes a limiter, and a rotation-stopping member mounted on the main shaft, the limiter has a middle section pivoted to the base, and has an abutting end protruding upward between a restricting member and the main guiding member, and a stop end protruding upward toward the main shaft, the abutting end is abutted against the guiding edge, the rotation-stopping member is provided with a rotation-stopping slot, when the pipe-moving frame is located in the first position, the abutting end will move to the second end of the guiding edge, and when the main shaft rotates to a position where the guiding pipe is aligned to the connecting pipe, the stop end will be engaged in the rotation-stopping slot to stop the main shaft from rotating, when the pipe-moving frame moves to the second position, the abutting end will move to the first end of the guiding edge, the stop end will be disengaged from the rotation-stopping slot to permit rotation of the main shaft.

3 more elements

A sewing machine with a threading and air supply selecting device comprising:

a base, a drive force source, a main shaft driven by the drive force source, at least one thread wiper driven by the main shaft, and a guiding pipe provided on the thread wiper, each of the guiding pipes having one end extended to a thread-inserting hole of the thread wiper, and another end fixed to a pipe-guiding frame of the thread wiper;
characterized in that:
the drive force source driving an air supply device, between the air-supply device and the pipe-guiding frames is disposed a pipe-moving device which includes a pipe-moving frame and a connecting pipe mounted on the pipe-moving frame and connected to the air supply device, the pipe-moving frame is provided at one end thereof with a main guiding member, a position where the main guide member moves to a connection between the connecting pipe and the guiding pipe is defined as a first position, and a position where the main guiding member moves away from the connection between the connecting pipe and the guiding pipe is defined as a second position;
and
between the main guiding member and the main shaft is disposed a directional positioning device, the main guiding member includes a guiding edge with height difference, the guiding edge has a first end and a second end lower than the first end, the directional positioning device includes a limiter, and a rotation-stopping member mounted on the main shaft, the limiter has a middle section pivoted to the base, and has an abutting end protruding upward between a restricting member and the main guiding member, and a stop end protruding upward toward the main shaft, the abutting end is abutted against the guiding edge, the rotation-stopping member is provided with a rotation-stopping slot, when the pipe-moving frame is located in the first position, the abutting end will move to the second end of the guiding edge, and when the main shaft rotates to a position where the guiding pipe is aligned to the connecting pipe, the stop end will be engaged in the rotation-stopping slot to stop the main shaft from rotating, when the pipe-moving frame moves to the second position, the abutting end will move to the first end of the guiding edge, the stop end will be disengaged from the rotation-stopping slot to permit rotation of the main shaft;
the main guiding member has one end connected to one end of a swing arm, another end of the swing arm is abutted against an air-supply clutch, the air-supply clutch is disposed on a power shaft of the drive force source, the swing arm, when in the first position, controls the air-supply clutch to transmit a drive force of the power shaft to the air supply device, or, the swing arm, when in the second position, controls the air-supply clutch to stop transmitting the drive force of the power shaft to the air supply device.

3 more elements

Dependencies are inferred from the claim text.

Description7,861 words

Summary2,947 words

#Field of the Invention

#The present invention relates to a sewing machine, and more particularly to a sewing machine with a threading and air supply selecting device.

#Description of the Prior Art

Brief description of the drawings17 figures

#FIG. 1 is an assembly view of a part of a sewing machine with a threading and air supply selecting device in accordance with an embodiment of the present invention;

#FIG. 2 is an assembly view of a part of the sewing machine with a threading and air supply selecting device in accordance with the present invention, wherein the base of the sewing machine is not shown;

#FIG. 3 is an exploded view of FIG. 2;

Detailed description4,477 words

#The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

#Referring to FIGS. 1-6, a sewing machine with a threading and air supply selecting device in accordance with an embodiment of the present invention comprises: a base 10, a drive force source 11, a main shaft 12 driven by the drive force source 11, at least one thread wiper driven by the main shaft 12, and a plurality of guiding pipes 15 provided on the thread wiper. The at least one thread wiper can be an upper thread wiper 13 or a combination of an upper thread wiper 13 and at least one lower thread wiper 14. In this embodiment, there are two lower thread wipers 14, each of the guiding pipes 15 has one end extended to a thread-inserting hole 130, 140 of the upper and lower thread wipers 13, 14, and another end fixed to a pipe-guiding frame 16 of the upper and lower thread wipers 13, 14. The drive force source 11 also drives an air supply device 20, between the air supply device 20 and the pipe-guiding frames 16 is disposed a pipe-moving device 30 which includes a pipe-moving frame 31 and a plurality of connecting pipes 32 mounted on the pipe-moving frame 31, and the number of the connecting pipes 32 is the same as that of the guiding pipes 15. The pipe-moving frame 31 is provided at one end thereof with a main guiding member 38. a position where the main guiding member 38 moves to a connection between the connecting pipes 32 and the guiding pipes 15 is defined as a first position P1, and a position where the main guiding member 38 moves away from the connection between the connecting pipes 32 and the guiding pipes 15 is defined as a second position P2.

#The main guiding member 38 has one end connected to one end of a swing arm 58 via a connecting rod assembly 50, and at two sides of another end of the swing arm 58 are disposed an air-supply clutch 60 and a first switch 59. The air-supply clutch 60 is disposed on a power shaft 110 of the drive force source 11, so that the swing arm 58, when in the first position P1, is abutted against the air-supply clutch 60. Or, the swing arm 58, when in the second position P2, is pushed against the first switch 59 and drives an air supply source 21 by being drivingly connected to a swing rod 23, or when in the second position P2, the swing arm 58 is disconnected from and unable to move the swing rod 23, and the first switch 59 is assuredly pushed to switch between different modes of controlling the drive force source 11.

Facts

Application

14/292,812Filed 30 May 2014

Priority

TW 103112806 A8 Apr 2014

Published

US 2015/0284890 A18 Oct 2015

Granted

10 Jan 2017

Term ends

30 Jul 2035

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 426 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification5 codes

D05B 53/00
Thread- or cord-laying mechanisms
D05B 87/00
Needle- or looper- threading devices
D05D 2207/04
Pneumatic or hydraulic devices: suction or blowing devices
D05B
Sewing

Timeline

8 Apr 2014Priority claimedTW 103112806 A
30 May 2014Application filedUS 14/292,812
8 Oct 2015PublishedUS 2015/0284890 A1
10 Jan 2017GrantedUS 9,540,751 B2
23 Apr 2026Assigned to Tsang Yu Industrial Co., Ltd.assignment of assignor's interest
12 Oct 2026TodayWithin its term
30 Jul 2035Term endsEstimated, includes 426 days of adjustment

Sewing machine with a threading and air supply selecting device

Life of this patent

Sewing machine with a threading and air supply selecting device

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims18

Description7,861 words

Description7,861 words

Drawings

Classification5 codes

Life of this patent