CN210975114U - Thread cutting device of sewing machine - Google Patents

Abstract

The utility model provides a pair of sewing machine's trimming device, include: a movable knife component; the movable cutter assembly comprises a movable cutter and a trimming plate, and the trimming plate is provided with a guide groove for the movable cutter to pass through; moving blade guide rails are detachably arranged on the two sides of the guide groove; the bottom of the hook-shaped end of the movable knife is also provided with a fixed knife; the movable cutter is provided with a hook-shaped end which can pass through the head end of the guide groove to hook a line and is matched with the fixed cutter to cut the line, and a connecting end which is positioned at the tail end of the guide groove and is used for connecting the driving device; the upper surface of the movable knife guide rail positioned at the hook-shaped end of the movable knife is also provided with a fixed knife supporting block; the fixed blade supporting block, the movable blade guide rail and the thread trimming plate form a cavity which is convenient for the hook-shaped end and the movable blade to pass through. The utility model solves the problem that the existing trimming plate and the needle plate are integrally formed, wherein the needle plate is easy to deform; meanwhile, the needle plate and the thread cutting plate are respectively connected with the machine head through fasteners, and the needle plate and the thread cutting plate can be independently disassembled; especially if the needle board or other parts are damaged and cannot be replaced.

Description

Thread cutting device of sewing machine

Technical Field

The utility model relates to a sewing machine accessory field, concretely relates to thread trimming device of sewing machine.

Background

At present, in the thread trimming mechanism of the existing sewing machine, the thread trimming component needs to realize the following functions: the switching function of the thread cutting position and the non-thread cutting position, the forced reset function and the like. Each part of a scissors component in a thread cutting mechanism of the existing sewing machine is integrally formed with a thread cutting plate, so that the installation is inconvenient, and the thread cutting plate and a needle plate in a thread cutting device of the sewing machine in actual production are integrally formed, wherein the needle plate is easy to deform; especially if the needle board or other parts are damaged and cannot be replaced.

Disclosure of Invention

Technical problem to be solved

The utility model aims at providing a thread cutting device of a sewing machine, which solves the problem that a thread cutting plate and a needle plate are integrally formed in the thread cutting mechanism of the existing sewing machine, wherein the needle plate is easy to deform; especially the defect that the needle board or other parts cannot be replaced after being damaged.

(II) technical scheme

In order to solve the technical problem, the utility model provides a pair of thread trimming device of sewing machine, include: a movable knife component and a needle plate; the movable cutter assembly comprises a movable cutter and a trimming plate, and the trimming plate is provided with a guide groove for the movable cutter to pass through; moving blade guide rails are detachably arranged on the two sides of the guide groove; the bottom of the hook-shaped end of the movable knife is also provided with a fixed knife; the movable cutter is provided with a hook-shaped end which can pass through the head end of the guide groove to hook a line and is matched with the fixed cutter to cut the line, and a connecting end which is positioned at the tail end of the guide groove and is used for connecting the driving device; the upper surface of the movable knife guide rail positioned at the hook-shaped end of the movable knife is also provided with a fixed knife supporting block; the fixed blade supporting block, the movable blade guide rail and the thread trimming plate form a movable cavity which is convenient for the hook-shaped end and the movable blade to pass through; the needle plate is tightly attached to the thread cutting plate, and the needle plate and the thread cutting plate are connected with the machine head through fasteners respectively. The utility model adopts the fixed knife supporting block, the movable knife guide rail and the thread trimming plate, and the fixed knife supporting block, the movable knife guide rail and the thread trimming plate are utilized to form a hook-shaped end and a movable cavity for the movable knife to pass through, so that the disassembly is convenient, the problem that the existing thread trimming plate and a needle plate are integrally formed is solved, and the needle plate is easy to deform; meanwhile, the needle plate and the thread cutting plate are respectively connected with the machine head through fasteners, and the needle plate and the thread cutting plate can be independently disassembled; especially if the needle board or other parts are damaged and cannot be replaced.

Preferably, the thread trimming device of the sewing machine further comprises a thread pressing spring; the line pressing spring comprises an arched connecting sheet and fixing sheets positioned at two ends of the connecting sheet; the middle part of the connecting sheet is provided with a reed which is right opposite to the guide groove, and the tail end of the reed penetrates into the movable cavity; the line pressing spring is used for applying an elastic force to press the movable knife and enable the movable knife to be tightly attached to the fixed knife. The utility model is provided with the line pressing spring for applying an elastic force to press the movable knife and make the movable knife cling to the fixed knife; the movable knife and the fixed knife are tightly attached together, so that the shearing efficiency is improved, meanwhile, the gap between the movable knife and the fixed knife is reduced, and garbage is prevented from entering the gap between the movable knife and the fixed knife; and the line pressing spring enables the movable knife to press the bottom line behind the shearing section, so that the bottom line is prevented from falling off.

Preferably, the fixing piece is mounted on the trimming plate by a fastener.

Preferably, the two ends of the fixed blade supporting block are mounted on the movable blade guide rail through fasteners.

Preferably, the thread trimming plate is positioned under the hook-shaped end, and an installation groove is formed in the thread trimming plate; the fixed cutter is installed on the bottom surface of the installation groove through a fastener. The utility model discloses set up the mounting groove, its be convenient for adjust stationary knife and move clearance between the sword, improve and cut efficiency.

Preferably, the needle plate is provided with a plurality of strip-shaped through holes.

(III) advantageous effects

The utility model provides a pair of sewing machine's trimming device, it has following advantage:

1. the utility model adopts the fixed knife supporting block, the movable knife guide rail and the thread trimming plate, and the fixed knife supporting block, the movable knife guide rail and the thread trimming plate are utilized to form a hook-shaped end and a movable cavity for the movable knife to pass through, so that the disassembly is convenient, the problem that the existing thread trimming plate and a needle plate are integrally formed is solved, and the needle plate is easy to deform; meanwhile, the needle plate and the thread cutting plate are respectively connected with the machine head through fasteners, and the needle plate and the thread cutting plate can be independently disassembled; especially if the needle board or other parts are damaged and cannot be replaced.

Drawings

FIG. 1 is an assembly structure view of an embodiment 1 of a thread trimmer according to the present invention;

fig. 2 is an exploded view of embodiment 1 of the thread trimming device of the sewing machine of the present invention.

1. The device comprises a movable knife, a wire cutting plate, a guide groove, a movable knife guide rail, a fixed knife, a hook-shaped end, a connecting end, a fixed knife supporting block, a movable cavity, a wire pressing spring, a connecting piece, a fixing piece, a spring piece, a reed, a mounting groove, a through hole, a pin plate and a connecting piece, wherein the movable knife 2, the wire cutting plate 3, the guide groove 4, the movable knife guide rail 5, the fixed.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically coupled, directly coupled, or indirectly coupled through an intermediary. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 and 2; the utility model provides a pair of sewing machine's trimming device, include: a movable knife component; the movable blade assembly comprises a movable blade 1, a trimming plate 2, a wire pressing spring 10 and a needle plate 16, and the trimming plate is provided with a guide groove 3 for the movable blade to pass through; movable knife guide rails 4 are detachably arranged on the two sides of the guide groove; the bottom of the hook-shaped end of the movable knife is also provided with a fixed knife 5; the movable cutter is provided with a hook-shaped end 6 which can pass through the head end of the guide groove to hook a line and is matched with the fixed cutter to cut the line, and a connecting end 7 which is positioned at the tail end of the guide groove and is used for connecting a driving device; the upper surface of the moving blade guide rail positioned at the hook-shaped end of the moving blade is also provided with a fixed blade supporting block 8; the fixed blade supporting block, the movable blade guide rail and the thread trimming plate form a structure convenient for the hook-shaped end and the movable blade to penetrate through the movable cavity 9. The line pressing spring comprises an arched connecting sheet 11 and fixing sheets 12 positioned at two ends of the connecting sheet; the middle part of the connecting sheet is provided with a reed 13 which is over against the guide groove, and the tail end of the reed penetrates into the movable cavity; the line pressing spring is used for applying an elastic force to press the movable knife and enable the movable knife to be tightly attached to the fixed knife. The fixing piece is installed on the wire cutting plate through a fastening piece. And two ends of the fixed cutter supporting block are arranged on the movable cutter guide rail through fasteners. The fasteners in the embodiment are screws, and corresponding screw holes are formed in the trimming plate.

The thread trimming plate is positioned under the hook-shaped end, and a mounting groove 14 is arranged below the hook-shaped end; the fixed cutter is installed on the bottom surface of the installation groove through a fastener. The needle plate is arranged at the front end of the thread trimming plate; the needle plate is provided with a plurality of strip-shaped through holes 15. The needle plate is tightly attached to the thread cutting plate, and the needle plate and the thread cutting plate are connected with the machine head through fasteners respectively.

In this embodiment implementation, when needing to install, will move sword, stationary knife, wire pressing spring and stationary knife supporting shoe through the screw and screw up in proper order and install on the trimming board.

Example 2

The utility model provides a pair of sewing machine's trimming device, include: a movable knife component and a needle plate; the movable cutter assembly comprises a movable cutter and a trimming plate, and the trimming plate is provided with a guide groove for the movable cutter to pass through; moving blade guide rails are detachably arranged on the two sides of the guide groove; the bottom of the hook-shaped end of the movable knife is also provided with a fixed knife; the movable cutter is provided with a hook-shaped end which can pass through the head end of the guide groove to hook a line and is matched with the fixed cutter to cut the line, and a connecting end which is positioned at the tail end of the guide groove and is used for connecting the driving device; the upper surface of the movable knife guide rail positioned at the hook-shaped end of the movable knife is also provided with a fixed knife supporting block; the fixed blade supporting block, the movable blade guide rail and the thread trimming plate form a movable cavity which is convenient for the hook-shaped end and the movable blade to pass through; the needle plate is tightly attached to the thread cutting plate, and the needle plate and the thread cutting plate are connected with the machine head through fasteners respectively.

The above-mentioned embodiments are only used for explaining the present invention, wherein the structure, connection mode, etc. of each component can be changed, all the equivalent transformation and improvement performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims (6)

1. A thread trimming device for a sewing machine, comprising: a movable knife component and a needle plate; the movable cutter assembly comprises a movable cutter and a trimming plate, and the trimming plate is provided with a guide groove for the movable cutter to pass through; moving blade guide rails are detachably arranged on the two sides of the guide groove; the bottom of the hook-shaped end of the movable knife is also provided with a fixed knife; the movable cutter is provided with a hook-shaped end which can pass through the head end of the guide groove to hook a line and is matched with the fixed cutter to cut the line, and a connecting end which is positioned at the tail end of the guide groove and is used for connecting the driving device; the upper surface of the movable knife guide rail positioned at the hook-shaped end of the movable knife is also provided with a fixed knife supporting block; the fixed blade supporting block, the movable blade guide rail and the thread trimming plate form a movable cavity which is convenient for the hook-shaped end and the movable blade to pass through; the needle plate is tightly attached to the thread cutting plate, and the needle plate and the thread cutting plate are connected with the machine head through fasteners respectively.

2. The thread trimmer according to claim 1, further comprising a thread pressing spring; the line pressing spring comprises an arched connecting sheet and fixing sheets positioned at two ends of the connecting sheet; the middle part of the connecting sheet is provided with a reed which is right opposite to the guide groove, and the tail end of the reed penetrates into the movable cavity; the line pressing spring is used for applying an elastic force to press the movable knife and enable the movable knife to be tightly attached to the fixed knife.

3. The thread trimmer according to claim 2, wherein the fixing piece is attached to the thread trimmer by a fastener.

4. The thread trimmer according to claim 1, 2 or 3, wherein both ends of said stationary blade support block are mounted on the movable blade guide by fasteners.

5. The thread trimmer according to claim 1, 2 or 3, wherein the thread trimming plate is provided with a mounting groove directly below the hook-shaped end; the fixed cutter is installed on the bottom surface of the installation groove through a fastener.

6. The thread trimmer according to claim 1, 2 or 3, wherein the needle plate is provided with a plurality of strip-shaped through holes.

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