阅读说明：本技术 针板结构及缝纫机 (Needle plate structure and sewing machine ) 是由 朱锦洲 吴明明 王跃 杨卫涛 于 2019-12-06 设计创作，主要内容包括：本发明公开了一种针板结构及缝纫机。针板结构包括：针板,其上贯穿设有针板孔；夹线结构,包括转动连接于针板的夹线动杆和固定于针板上的夹线定杆,夹线动杆上贯穿设有过线孔,夹线动杆能够在经过夹线定杆的过程中依次夹线与松线；剪线结构,包括转动连接于针板的动刀和固定于针板的定刀；驱动源,驱动源通过传动结构连接夹线动杆和动刀,驱动源能够依次驱动夹线动杆经过针板孔与夹线定杆后,再驱动动刀经过针板孔以配合定刀剪线。采用单一驱动源经传动结构驱动夹线动杆和动刀运动,夹线结构和剪线结构可始终按照传动结构所限定的操作顺序依次经过针板孔,使夹线操作、松线操作与剪线操作有序进行,避免夹线结构和剪线结构的动作发生干涉。(The invention discloses a needle plate structure and a sewing machine. The needle board structure includes: the needle plate is provided with a needle plate hole in a penetrating way; the wire clamping structure comprises a wire clamping moving rod rotationally connected to the needle plate and a wire clamping fixed rod fixed on the needle plate, a wire passing hole penetrates through the wire clamping moving rod, and the wire clamping moving rod can sequentially clamp and release wires in the process of passing through the wire clamping fixed rod; the thread cutting structure comprises a movable cutter rotationally connected with the needle plate and a fixed cutter fixed on the needle plate; the driving source is connected with the wire clamping moving rod and the movable cutter through the transmission structure, and the driving source can sequentially drive the wire clamping moving rod to pass through the needle plate hole and the wire clamping fixed rod and then drive the movable cutter to pass through the needle plate hole to match with the fixed cutter for wire cutting. The single driving source is adopted to drive the wire clamping moving rod and the moving cutter to move through the transmission structure, the wire clamping structure and the wire shearing structure can always sequentially pass through the needle plate holes according to the operation sequence limited by the transmission structure, so that the wire clamping operation, the wire loosening operation and the wire shearing operation are performed in order, and the interference of the actions of the wire clamping structure and the wire shearing structure is avoided.)

1. A needle board structure, comprising:

the needle plate (2) is provided with a needle plate hole (21) in a penetrating way;

the wire clamping structure comprises a wire clamping moving rod (3) rotationally connected to the needle plate (2) and a wire clamping fixed rod (1) fixed on the needle plate (2), a wire passing hole (31) penetrates through the wire clamping moving rod (3), and the wire clamping moving rod (3) can sequentially clamp and release wires in the process of passing through the wire clamping fixed rod (1);

the thread cutting structure comprises a movable cutter (4) which is rotatably connected with the needle plate (2) and a fixed cutter (5) which is fixed on the needle plate (2);

the line clamping and fixing device comprises a driving source (6), wherein the driving source (6) is connected with the line clamping and moving rod (3) and the movable knife (4) through a transmission structure, the driving source (6) can drive the line clamping and moving rod (3) in sequence to pass through the needle plate hole (21) and the line clamping and fixing rod (1) and then drive the movable knife (4) to pass through the needle plate hole (21) to cooperate with the fixed knife (5) to cut lines.

2. A faller structure according to claim 1 in which the drive formation is a link formation.

3. A needle board structure as claimed in claim 2, in which the link arrangement comprises:

an intermediate link (7) with at least three free ends, the middle part of the intermediate link (7) is rotationally connected to the needle plate (2), and a first free end (71) of the intermediate link (7) is connected with the driving source (6);

a wire clamping connecting rod component connected between the second free end (72) of the intermediate connecting rod (7) and the wire clamping moving rod (3);

and the wire cutting connecting rod component is connected between the third free end (73) of the middle connecting rod (7) and the movable blade (4).

4. A faller structure according to claim 3 in which the active pinch bar (3) is located between the stationary pinch bar (1) and the faller bar (2).

5. A faller structure according to claim 3 wherein the live nipping lever (3) and the moving blade (4) rotate in the same direction.

6. The needle board structure of claim 3, wherein the thread clamping link assembly comprises one link and the thread cutting link assembly comprises at least two links connected in series.

7. The needle board structure according to claim 3, characterized in that the thread cutting connecting rod assembly comprises a first movable knife driving rod (9) with the middle part rotatably connected with the needle board (2), a second movable knife driving rod (10) connected between the first driving rod end part (91) of the first movable knife driving rod (9) and the middle part of the movable knife (4), and a third movable knife driving rod (11) connected between the second driving rod end part (92) of the first movable knife driving rod (9) and the third free end (73); the second free end (72) and the first driving rod end part (91) are arranged on the same side of the third movable blade driving rod (11).

8. A sewing machine including a needle plate structure as claimed in any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of sewing, in particular to a needle plate structure and a sewing machine.

Background

In a sewing machine, a thread clamping structure is generally provided to prevent a thread slipping phenomenon in sewing. However, the thread clamping structure and the thread cutting structure in the sewing machine are respectively provided with separate driving sources, so that the thread clamping and releasing actions of the thread clamping structure and the thread cutting action of the thread cutting structure are respectively driven by the respective driving sources, the actions of the two are easy to interfere, and the thread clamping structure and the thread cutting structure may collide with each other.

Therefore, how to reduce the possibility of interference between the thread clamping structure and the thread cutting structure is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a needle plate structure, which has a low possibility of interference between the thread clamping structure and the thread cutting structure. Another object of the present invention is to provide a sewing machine including the above needle plate structure, in which the possibility of interference between the actions of the thread clamping structure and the thread cutting structure is low.

In order to achieve the purpose, the invention provides the following technical scheme:

a needle board structure comprising:

the needle plate is provided with a needle plate hole in a penetrating way;

the wire clamping structure comprises a wire clamping moving rod rotationally connected to the needle plate and a wire clamping fixed rod fixed on the needle plate, a wire passing hole penetrates through the wire clamping moving rod, and the wire clamping moving rod can sequentially clamp and release wires in the process of passing through the wire clamping fixed rod;

the thread cutting structure comprises a movable cutter rotationally connected with the needle plate and a fixed cutter fixed on the needle plate;

the drive source, the drive source passes through transmission structure and connects the clamp wire moves the pole with move the sword, the drive source can drive in proper order the clamp wire moves the pole and passes through the needle-plate hole with behind the clamp wire stationary bar, the redrive move the sword process the needle-plate hole is in order to cooperate the stationary knife trimming.

Preferably, the transmission structure is a link structure.

Preferably, the link structure includes:

the middle part of the middle connecting rod is rotatably connected to the needle plate, and the first free end of the middle connecting rod is connected with the driving source;

the wire clamping connecting rod component is connected between the second free end of the intermediate connecting rod and the wire clamping moving rod;

and the wire cutting connecting rod component is connected between the third free end of the middle connecting rod and the movable blade.

Preferably, the wire clamping moving rod is arranged between the wire clamping fixed rod and the needle plate.

Preferably, the wire clamping moving rod and the moving blade rotate in the same direction.

Preferably, the wire clamping connecting rod assembly comprises a connecting rod, and the wire cutting connecting rod assembly comprises at least two connecting rods connected in sequence.

Preferably, the thread trimmer connecting rod assembly comprises a first movable cutter driving rod, a second movable cutter driving rod and a third movable cutter driving rod, wherein the middle part of the thread trimmer connecting rod assembly is rotatably connected to the needle plate; the second free end and the end part of the first driving rod are arranged on the same side of the third movable cutter driving rod.

A sewing machine including a needle plate arrangement as claimed in any preceding claim.

The invention provides a needle plate structure, comprising: the needle plate is provided with a needle plate hole in a penetrating way; the wire clamping structure comprises a wire clamping moving rod rotationally connected to the needle plate and a wire clamping fixed rod fixed on the needle plate, a wire passing hole penetrates through the wire clamping moving rod, and the wire clamping moving rod can sequentially clamp and release wires in the process of passing through the wire clamping fixed rod; the thread cutting structure comprises a movable cutter rotationally connected with the needle plate and a fixed cutter fixed on the needle plate; the driving source is connected with the wire clamping moving rod and the movable cutter through the transmission structure, and the driving source can sequentially drive the wire clamping moving rod to pass through the needle plate hole and the wire clamping fixed rod and then drive the movable cutter to pass through the needle plate hole to match with the fixed cutter for wire cutting.

The single driving source is adopted to drive the wire clamping moving rod and the moving cutter to move through the transmission structure, the wire clamping structure and the wire shearing structure can always sequentially pass through the needle plate holes according to the operation sequence limited by the transmission structure, so that the wire clamping operation, the wire loosening operation and the wire shearing operation are carried out in order, the interference of the actions of the wire clamping structure and the wire shearing structure is avoided, and the sewing machine is stable in work.

The sewing machine comprising the needle plate structure provided by the invention has the advantage that the possibility of interference between the actions of the thread clamping structure and the thread cutting structure in the needle plate structure is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a block diagram of a needle board structure provided by the present invention;

FIG. 2 is a schematic view of a needle board structure provided by the present invention during stitch making;

FIG. 3 is a schematic view of a needle plate structure provided by the present invention during thread clamping;

FIG. 4 is a schematic view of a needle plate construction provided by the present invention during thread slackening;

fig. 5 is a schematic diagram of the needle plate structure provided by the invention during thread dividing and thread cutting.

Reference numerals:

the thread clamping device comprises a thread clamping fixed rod 1, a needle plate 2, a needle plate hole 21, a thread clamping movable rod 3, a thread passing hole 31, a movable cutter 4, a fixed cutter 5, a driving source 6, an intermediate connecting rod 7, a first free end 71, a second free end 72, a third free end 73, a thread clamping connecting rod 8, a first movable cutter driving rod 9, a first driving rod end part 91, a second driving rod end part 92, a second movable cutter driving rod 10, a third movable cutter driving rod 11 and a driving source connecting rod 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a needle plate structure, and the possibility of interference between the actions of the upper thread clamping structure and the thread cutting structure is low. Another core of the invention is to provide a sewing machine comprising the needle plate structure, wherein the needle plate structure has low possibility of interference between the actions of the thread clamping structure and the thread cutting structure.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In an embodiment of the needle board structure provided by the present invention, please refer to fig. 1, which includes a needle board 2, a thread clamping structure and a thread cutting structure. The needle plate 2 is provided with a needle plate hole 21. The wire clamping structure comprises a wire clamping moving rod 3 which is rotatably connected to the needle plate 2 and a wire clamping fixed rod 1 which is fixed on the needle plate 2, a wire passing hole 31 penetrates through the wire clamping moving rod 3, and the wire clamping moving rod 3 can sequentially clamp and loosen wires in the process of passing through the wire clamping fixed rod 1. The thread cutting structure comprises a movable cutter 4 which is rotatably connected with the needle plate 2 and a fixed cutter 5 which is fixed on the needle plate 2. The rotating connection in this embodiment may be realized by connecting a plate or a rod to the rotating shaft.

Meanwhile, the needle plate structure further comprises a driving source 6, which can be a stepping motor. The driving source 6 connects the wire clamping moving rod 3 and the moving blade 4 through a transmission structure, that is, the wire clamping moving rod 3 and the moving blade 4 are driven by the same driving source 6. The driving source 6 can drive the wire clamping moving rod 3 to pass through the needle plate hole 21 and the wire clamping fixed rod 1 in sequence, and then drive the moving blade 4 to pass through the needle plate hole 21 to cooperate with the fixed blade 5 to cut the wire.

In the embodiment, the single driving source 6 is adopted to drive the wire clamping moving rod 3 and the moving blade 4 to move through the transmission structure, the wire clamping structure and the wire shearing structure can always sequentially pass through the needle plate holes 21 according to the operation sequence limited by the transmission structure, so that the wire clamping operation, the wire loosening operation and the wire shearing operation are performed in order, the interference of the actions of the wire clamping structure and the wire shearing structure is avoided, and the sewing machine is stable in work.

Furthermore, the transmission structure is a connecting rod structure, and processing is facilitated. Preferably, the link structure comprises an intermediate link 7, a wire clamping link assembly and a wire cutting link assembly. Wherein, the middle part of the middle connecting rod 7 is rotationally connected with the needle plate 2, and the middle connecting rod 7 is provided with at least three free ends, in particular to a T-shaped rod with three free ends. The free ends of the intermediate link 7 include a first free end 71, a second free end 72 and a third free end 73. The first free end 71 is rotatably connected to the driving source 6, and the first free end 71 and the driving source 6 may be connected by a driving source link 12. The clamp link assembly is connected between the second free end 72 and the clamp lever 3. The shear line linkage assembly is connected between the third free end 73 and the moving blade 4.

Because the wire clamping connecting rod assembly and the wire shearing connecting rod assembly are respectively arranged at two free ends of the middle connecting rod 7, the wire clamping connecting rod assembly and the wire shearing connecting rod assembly are generally in a seesaw type structure, and the operation state of the needle plate structure can be conveniently determined according to the observation of the rotation angle of the middle connecting rod 7.

Further, the wire clamping moving rod 3 is arranged between the wire clamping fixed rod 1 and the needle plate 2, and the smooth movement of the wire clamping moving rod 3 can be ensured through layered arrangement, so that the wire clamping fixed rod 1 is prevented from blocking the movement of the wire clamping moving rod 3. Or the thread clamping fixed rod 1 is arranged between the thread clamping moving rod 3 and the needle plate 2.

Further, the rotation direction of the wire clamping moving rod 3 is the same as that of the moving blade 4, that is, at the same time, the wire clamping moving rod 3 and the moving blade 4 both rotate clockwise or both rotate anticlockwise, so that the paths of the moving blade 4 and the wire clamping moving rod 3 can be more conveniently planned to avoid collision between the moving blade and the moving blade.

Further, the wire clamping connecting rod assembly comprises a connecting rod, the wire cutting connecting rod assembly comprises at least two connecting rods which are sequentially connected, only one connecting rod is arranged in the wire clamping connecting rod assembly, for example, the wire clamping connecting rod 8 connected between the second free end 72 and the middle part of the wire clamping moving rod 3 in the figure 1 can simplify the structure, and the installation positions and the number of the wire clamping connecting rod assemblies can be determined according to the actions of the wire clamping connecting rod assemblies and the wire clamping moving rods 3. Of course, in other embodiments, the clamp line linkage assembly may include two or other numbers of links, and only one link may be provided in the shear line linkage assembly.

Further, the thread cutting link assembly comprises a first movable blade driving rod 9 with the middle part rotatably connected to the needle plate 2, a second movable blade driving rod 10 connected between the first driving rod end part 91 of the first movable blade driving rod 9 and the middle part of the movable blade 4, and a third movable blade driving rod 11 connected between the second driving rod end part 92 of the first movable blade driving rod 9 and the third free end 73. The first moving blade driving rod 9 may be formed by connecting two branch rods, and the first driving rod end 91 and the second driving rod end 92 are respectively located on the two branch rods.

The second free end 72 and the first driving rod end 91 are disposed on the same side of the third moving-blade driving rod 11, so that the swinging direction of the middle connecting rod 7 can be transmitted to the first moving-blade driving rod 9 in the same direction. As shown in fig. 5, the middle link 7 rotates clockwise, the third free end 73 moves downward, the second driving rod end 92 of the first moving blade driving rod 9 moves downward and the first driving rod end 91 moves upward through the transmission of the third moving blade driving rod 11, that is, the first moving blade driving rod 9 also rotates clockwise, the second moving blade driving rod 10 pushes the moving blade 4 and the thread clamping link 8 to pull the thread clamping rod 3, so that the rotation directions of the moving blade 4 and the thread clamping link 8 and the time sequence relation of the moving blade and the thread clamping link 21 can be conveniently controlled.

The working principle of the needle plate structure provided by the embodiment is as follows:

as shown in fig. 2, during the start of sewing, the movable blade 4 and the clamping moving rod 3 are at initial positions, wherein the thread passing holes 31 on the clamping moving rod 3 are just aligned with the needle plate holes 21 on the needle plate 2, so that the needles can pass through the thread passing holes 31 and the needle plate holes 21 during the start of sewing. After the sewing machine needle starts sewing, after the sewing machine needle finishes that the first needle moves upwards and leaves the thread passing hole 31, the driving source drives the movable knife 4 and the thread clamping movable rod 3 to rotate anticlockwise, the thread clamping movable rod 3 is far away from the needle plate hole 21 to rotate anticlockwise, the upper thread is pulled to the clamping position shown in figure 3, at the moment, the thread clamping movable rod 3 and the thread clamping fixed rod 1 are overlapped together, and the upper thread is clamped between the thread clamping movable rod 3 and the thread clamping fixed rod 1. After the needle number is set for sewing, the thread clamping lever 3 continues to rotate counterclockwise, and the upper thread is released from between the thread clamping lever 3 and the thread clamping fixed lever 1, as shown in fig. 4, thereby realizing thread loosening. The driving source continues to drive, the wire clamping moving rod 3 continues to rotate in the original direction, and the moving knife 4 moves towards the needle plate hole 21 and cooperates with the fixed knife 5 to cut the wire when passing through the needle plate hole 21.

In the embodiment of the invention, the thread cutting structure, the transmission structure and the thread clamping structure form a connecting rod rotating pair, and the thread clamping, thread loosening and thread cutting are controlled in a circulating manner by the control of the same driving source, so that the action has stronger time sequence.

Of course, in other embodiments, the transmission structure may be implemented as a gear transmission structure.

In addition to the needle plate structure, the invention also provides a sewing machine, which comprises the needle plate structure, specifically, the needle plate structure provided in any one of the above embodiments, and the beneficial effects can be correspondingly referred to the above embodiments. The structure of other parts of the sewing machine is referred to the prior art, and the description is omitted.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The sewing machine and the needle plate structure provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.