CN208899133U - The thread hooking and cutting device of sewing machine - Google Patents

Abstract

The utility model about a kind of sewing machine thread hooking and cutting device, it mainly includes double dynamical group, link mechanism and hooks cut unit, wherein it is made of the first, second power source for described double dynamical group, and in the corresponding connection link mechanism in the power output shaft end of two power sources, and the hook cut unit includes a substrate, first, second, which is equipped with, in described substrate one end hooks cutter, other end correspondence is pivoted with the link mechanism, is equipped with one for a group loose slot of the setting inside sewing machine table then at the substrate；Whereby, the double dynamical group of output multisection type control stroke is enabled, the first, second hook cutter can be driven to hook respectively, and pick-up stitches upper thread, baseline is chained and cut off, and keeps thread link non-off-line.

Description

The thread hooking and cutting device of sewing machine

Technical field

The utility model is about a kind of thread hooking and cutting device of sewing machine, and espespecially one kind can hook pick-up seam upper thread, bottom Line is chained and is cut off, and thread is made to chain non-off-line line hooking and cutting device.

Background technique

Sewing machine has the function of automatic tangent, and when suture needle carries out sewing, hook wire loop device is driven around suture drawing-in thread The coil of formation, and tighten in cloth in the following, the cutoff tool meeting severing of hook wire loop device side is around suture when terminating sewing operation And thread, to complete sewing.But the cloth that sewing is completed, it is to be tightened in cloth by each thread in the following, working as around suture The thread of least significant end falls off, and when around suture end by pull, will lead to gradually be detached from around suture thread around knot, and cause Sewing gradually loosens situation in the thread on cloth.

To solve the missing that the thread on above-mentioned cloth gradually loosens, in industry be research and development just like Taiwan Patent bulletin the No. 534117 " needle tracking bursts forth anti-locking apparatus ", or as Taiwan Patent announce a kind of I 485299 linear slits burst forth prevention method and Its device, has: configuration holds knife in ring apical organ going-back position side；Utilize the hook for holding knife reciprocating movement；What restrict hook was retreated Limiting member；And change the route diversion means of hook shuttle path, and it adds, it can the control in sewing finishing but also with having At making to be hooked into card release together in the ring top line of cyclic annular suture needle line to ring apical organ, captures when hook retreats and recycle after above-mentioned ring top line Limiting member makes the front end of the hook stop at cyclic annular suture needle line rear, drives while changing hook shuttle path after hook stopping A dynamic suture needle amount sewing machine makes ring apical organ advance once again, makes the hook cyclic annular suture needle line that ring apical organ is captured into being sticked in toward moving It is sticked in the ring top line of cyclic annular suture needle line to ring apical organ simultaneously, carries out the holding section of each line by holding knife using next double action The control means of cutting.

Or the Taiwan Patent that inventor is researched and developed announces No. M354617 " hooking and cutting device for preventing sewing chain mesh from loosening ", It is to fall lower section at needle in the up and down sweep of vehicle needle, is equipped with correspondence in side and hooks up around the hook wire loop device of suture and cutting Knife, and the other side is then equipped with hooking and cutting device, it is characterised in that: the hooking and cutting device mainly swings piece by a power source drive, with It enables and swings piece pushing and pressing movable component displacement, and the plastic cutter being mounted on movable component can be hooked and cuts through the hook line through between vehicle needle suture Ring device around suture.

In addition, Taiwan Patent announces No. M383578 " hooking and cutting device (one) for preventing sewing chain mesh from loosening ", it is in vehicle needle Up and down sweep falls at needle lower section, is equipped with the corresponding hook wire loop device and cutoff tool hooked up around suture in side, and the other side Then it is equipped with hooking and cutting device, it is characterised in that: the hooking and cutting device is mainly by a power source drive strut, to enable strut force pull Swing arm displacement, and the plastic cutter being mounted in swing arm can be hooked and cuts through through the hook wire loop device between vehicle needle suture around suture.

In addition, Taiwan Patent announces No. M467681 " hooking and cutting device of sewing chain mesh locking wire ", it mainly include a pendulum Arm, a machine plate, a connection rod set, a rocker and a plastic cutter, and the swing arm, machine plate, connection rod set, rocker and the plastic cutter is made to be set to one On sewing machine, the force side which is articulated equipped with a fulcrum being articulated with pivot and the machine plate and one with the connection rod set, With one be equipped with pivot hole make moved end, and be articulated with the rocker in its pivot hole of moved end of making of the swing arm, and in forming one on the rocker Trough type guide hole, and it is equipped with guide rod in the trough type guide hole, it is multiple to be connected to the plastic cutter in group on the rocker.

However, above-mentioned patented technology substantially adopts the locking wire mode of single thread link, but single link locking wire is same Sample will cause loosening for another thread, therefore need to research and develop improvement again.

Therefore, inventor adheres to the abundant of the relevant industries for many years and designs and develops and actual fabrication experience, for existing Structure is studied improvement again, provides a kind of thread hooking and cutting device of sewing machine, to reach the mesh of more preferably practical value 's.

Utility model content

The main purpose of the utility model is to provide a kind of thread hooking and cutting devices of sewing machine, and espespecially one kind can be hooked and be taken Sewing upper thread, baseline are chained and are cut off, and thread is made to chain non-off-line its purpose of line hooking and cutting device.

The thread hooking and cutting device main purpose and effect of the utility model sewing machine, are reached by technological means in detail below At:

It mainly includes double dynamical group, link mechanism and hooks cut unit, wherein described double dynamical group is moved by first, second Power source composition, and in the corresponding connection link mechanism in the power output shaft end of two power sources, and the hook cut unit includes a base Plate, Yu Suoshu substrate one end are equipped with first, second and hook cutter, and other end correspondence is pivoted with the link mechanism, then at the base Plate is equipped with a loose slot being located inside sewing machine table for group setting；Whereby, the double dynamical group of output multisection type is enabled to control Stroke, the first, second hook cutter can be driven to hook respectively, and pick-up stitches upper thread, baseline is chained and cut off, and makes thread link not Off-line.

The thread hooking and cutting device of sewing machine as described above, wherein described double dynamical group of the first, second power source Force-output shaft wears group on a pressing plate respectively, and is arranged an elastic component in the force-output shaft of second power source, and is butted on described Pressing plate is equipped with a drive portion then at the pressing plate.

The thread hooking and cutting device of sewing machine as described above, wherein the link mechanism includes one first double-action plate, In central part be equipped with pivot determine portion, the pivot determine portion and is positioned on board for pivot group, and first double-action plate one end correspondence and Double dynamical group of the drive portion connection；One first connecting rod, is located at first direction, and one end correspondence is another with first double-action plate One end connection；One second double-action plate is equipped with articulated section in central part, and the articulated section is positioned on board for pivot group, described Connection that second double-action plate one end corresponds to and the first connecting rod other end is pivoted；One second connecting rod is located at second direction, one end It is corresponding to link with the second double-action plate other end, and second connecting rod other end correspondence connects with the substrate for hooking cut unit Knot.

The thread hooking and cutting device of sewing machine as described above, wherein the first, second hook cutter phase for hooking cut unit It is adjacent and set, and the hook cut unit is positioned inside board by the loose slot by component.

Detailed description of the invention

Fig. 1: the perspective exploded view of the utility model.

Fig. 2: the assembling schematic perspective view of the utility model.

Fig. 3: the not operating preceding schematic diagram of double dynamical group of the utility model.

Fig. 4: the utility model first moves three-dimensional appearance schematic diagram when movement travel.

Fig. 5: double dynamical group first of the utility model moves movement travel schematic diagram.

Fig. 6: the utility model second moves three-dimensional appearance schematic diagram when movement travel.

Fig. 7: double dynamical group second of the utility model moves movement travel schematic diagram.

Fig. 8: the utility model third moves three-dimensional appearance schematic diagram when movement travel.

Fig. 9: the double dynamical group of third of the utility model moves movement travel schematic diagram.

Figure 10: two hook cutter hook section line and baseline schematic diagram when the sewing of the utility model.

[symbol description]

1 double dynamical group

11 first power sources

111 first locating parts

112 second locating parts

12 second power sources

13 pressing plates

131 drive portions

132 first perforation

133 second perforation

14 elastic components

2 link mechanisms

20 pivots determine portion

21 first double-action plates

22 first connecting rods

23 second double-action plates

231 articulated sections

24 second connecting rods

3 hook cut unit

31 substrates

311 loose slots

32 first hook cutter

33 second hook cutter

34 components

4 fixinig plates

41 elongated slots

A1 work top

A2 the first vehicle needle

A3 the second vehicle needle

A4 hooks circle device

Specific embodiment

Technology contents, purpose of utility model and its effect of reaching to use the utility model have more complete and clear The exposure of Chu is hereby described in detail under, and also referring to each attached drawing:

It is the solid point of the thread hooking and cutting device of the sewing machine of the utility model firstly, please referring to shown in Fig. 1-Fig. 2 Solution and assembling schematic perspective view mainly include:

A pair of power packages 1 are installed on board, and are made of the first, second power source 11,12, first, second power The force-output shaft in source 11,12 wears group in the first, second perforation 132,133 set on a pressing plate 13 respectively, and in the first power source The both ends of corresponding first perforation 132 of 11 force-output shaft the first, second locating part of set group 111,112 respectively, allows first power The power stroke in source 11 is restrained by first, second locating part 111,112, then at the power output axle sleeve of second power source 12 If an elastic component 14 is simultaneously butted on the pressing plate 13, and 13 side of the pressing plate is equipped with a drive portion 131；

One link mechanism 2 determines portion 20 equipped with a pivot and correspondence is positioned at board, the relatively described pivot of Yu Suoshu link mechanism 2 Determine the one end in portion 20, can link with the drive portion 131, and 2 actuation of link mechanism can be driven through the drive portion 131；

One hooks cut unit 3, includes a substrate 31, and group is equipped with first, second and hooks cutter 32,33 on Yu Suoshu substrate 31, The first, second hook cutter 32,33 is adjacent and sets, then at described 31 one end of substrate correspondence and 2 other end of link mechanism Group sets combination, and 31 other end of the substrate is equipped with loose slot 311, and the loose slot 311 is by component 34 by the hook Cut unit 3 is positioned inside board.

It please refers to shown in Fig. 1-Fig. 3, when actual assembled, described double dynamical group 1 is installed on inside board, it is described Double dynamical group 1 includes the first, second power source 11,12, the distance of the movement travel of first, second power source 11,12 It is different from the time, then the force-output shaft of first, second power source 11,12 is allowed to be arranged in a pressing plate 13, and crush board 13 respectively On the power output shaft end of the first power source 11 be reserved with the stroke X of suitable length, i.e., be resisted against above the described pressing plate 13 described First locating part 111, lower section are resisted against the stroke between second locating part 112, and on the force-output shaft of the second power source 12 It is arranged an elastic component 14, and the elastic component 14 is allowed to be butted on the pressing plate 13, and shaft end of contributing does not reserve stroke and with spiral shell If part locks, two power sources can be allowed to form different movement travel distances, time；Later, a fixinig plate is equipped on board 4, the fixinig plate 4 is equipped with an elongated slot 41, and the drive portion 131 of the pressing plate 13 is allowed to pass through the elongated slot 41 and the connecting rod machine 2 pivot group of structure.

And the link mechanism 2 is mainly to link described double dynamical group 1 and the function of hooking cut unit 3, with can be by institute The movement travel for stating double dynamical group 1 output is transferred to the hook cut unit 3, and therefore, the setting of the link mechanism 2 can be according to not Make to change with sewing machine table, does not limit to specific kenel；Here, illustrating a preferable enforceable connecting rod with reference to the accompanying drawings Mechanism 2, it includes have:

One first double-action plate 21 is equipped with pivot in central part and determines portion 20, and the pivot is determined portion 20 and is positioned on board for pivot group, And described first double-action plate, 21 one end is corresponding and double dynamical group 1 of the drive portion 131 links；

One first connecting rod 22 is located at first direction, and one end is corresponding to be linked with 21 other end of the first double-action plate；

One second double-action plate 23 is equipped with articulated section 231 in central part, and the articulated section 231 is positioned at board for pivot group Upper formation rotation fulcrum, connection that described second double-action plate, 23 one end corresponds to and 22 other end of first connecting rod is pivoted；

One second connecting rod 24 is located at second direction, and one end is corresponding to be linked with 23 other end of the second double-action plate, and institute The corresponding substrate 31 with the hook cut unit 3 of 24 other end of second connecting rod is stated to link.

It, can will be described pair using described double dynamical group 1 of the corresponding connection of aforementioned link mechanism 2 and the hooks cut unit 3 The movement travel that power packages 1 export is transferred to the hook cut unit 3；Then, the substrate 31 for hooking cut unit 3 is by the work Dynamic slot 311, is mounted on board by the loose slot 311 using component 34, and the substrate 31 is located at sewing machine trolley Below work top A1 when seam, in the first, second hook cutter 32,33 that locks respectively on the substrate 31 for hooking cut unit 3, and Make the first, second hook cutter 32,33 adjacent and set.

It when practical operation, please refers to shown in Fig. 4-Fig. 5, via starting described double dynamical group 1, allows first, second to move The actuation simultaneously of power source 11,12, to respectively drive the first dynamic movement travel for retracting force-output shaft, and band dynamic pressure plate 13 compression the simultaneously The first locating part 111 at elastic component 14 at two power sources, 12 force-output shaft, and compression 11 force-output shaft of the first power source, and make to press Drive portion 131 on plate 13 interlocks the first double-action plate 21 in moving down and drive in elongated slot 41, and because of the first double-action plate 21 Pivot determines portion 20 and is located in board, therefore is displaced the first double-action plate 21 in turn, and first connecting rod 22 is pulled to be displaced in first direction, It drives the second double-action plate 23 to be displaced in turn simultaneously, when the second 23 turn of double-action plate, then drives second connecting rod 24 toward second party To displacement, the substrate 31 for hooking cut unit 3 is allowed to be displaced forward by the limit of loose slot 311 and component 34 with guiding, Driving simultaneously, which makes the first, second hook cutter 32,33 go out knife, is displaced forward, and first, second vehicle needle A2, A3 at this time is to wear the material that sews cloth The state risen afterwards, and allow sewing upper thread [indicating with solid black lines] to form coil, then allow and wear the hook circle that baseline is represented by dotted lines Device A4 is inserted in two needle thread loops, here, the first hook 32 right position of cutter for enabling the substrate 31 drive is in the second vehicle needle A3 shape At the upper thread rear of loop, and second hook cutter 33 is butted between hook circle device A4 and baseline.

Later, it please refers to shown in Fig. 6-Fig. 7, the second dynamic movement travel of double dynamical group 1 execution, that is, allows the second power Source 12 discharges, and force-output shaft is made to reset stretching, extension, and pressing plate 13 is then supported by elastic component 14 and up resetted, but because the first power source 11 according to So in the state retracted, therefore the pressing plate 13 moves up and is resisted against first locating part 111, i.e., pressing plate 13 is reducible Stroke is only the reserved stroke X of the power output shaft end of the first power source 11, i.e., the drive portion 131 of crush board 13 is in micro- in elongated slot 41 Amount movement, and interlock the link mechanism 2 movement [and its connect fortune mode as it is above-mentioned it is solid no longer plus repeat]；When link mechanism 2 It drives when hooking cut unit 3, substrate 31 is allowed to be displaced suitable distance backward by loose slot 311, and distance of this movement allows first The corresponding needle thread loop for catching on the second vehicle needle A3 of cutter 32 is hooked, and the second hook cutter 33 corresponds to the baseline caught on circle device A4, And this second dynamic movement travel can stop appropriate time, and first, second vehicle needle A2, A3 of rising is allowed to wear seam down in this time Cloth material respectively corresponds two needle thread loops again and makees primary link.

Then, it please refers to shown in Fig. 8-Figure 10, the double dynamical group 1 execution third moves movement travel, that is, allows the first power Source 11 discharges, and force-output shaft is made to reset stretching, extension, resets in this way, the force-output shaft of two power sources returns, the drive portion 131 of crush board 13 In 41 reset movement of elongated slot, and interlock the link mechanism 2 movement [and its connect fortune mode as it is above-mentioned it is solid no longer plus repeat]；When Link mechanism 2 drives when hooking cut unit 3 and resetting, and allows substrate 31 by loose slot 311 and reset movement backward, meanwhile, allow work It is another below table top A1 to hook the needle thread loop for not showing in cutter figure and hooking the second vehicle needle A3 that breaks, and the second hook cutter 33 hooks disconnected hook and encloses device Baseline on A4, and cut off after forming upper thread and baseline link, make the upper thread and the non-off-line effect of baseline of sewing.

However product aspect, structure or the usage mode of embodiment above-mentioned or attached drawing and non-limiting the utility model, appoint The appropriate changes or modifications of what those of ordinary skill in the art, all should be regarded as the patent for not departing from the utility model Scope.

Claims (3)

1. a kind of thread hooking and cutting device of sewing machine, mainly includes:

A pair of power packages are installed on board, and are made of the first, second power source, the force-output shaft of first, second power source Group is worn respectively in the first, second perforation set on a pressing plate, and in the two of corresponding first perforation of the force-output shaft of the first power source The first, second locating part of set group respectively is held, the power stroke of first power source is allowed to be arrested by first, second locating part Beam is arranged an elastic component then at the force-output shaft of second power source and is butted on the pressing plate, and the pressing plate side is equipped with One drive portion；

One link mechanism determines portion equipped with a pivot and correspondence is positioned at board, and the relatively described pivot of Yu Suoshu link mechanism determines the one of portion End, can link, and the link mechanism actuation can be driven through the drive portion with the drive portion；

One hooks cut unit, includes a substrate, and group is equipped with first, second and hooks cutter on Yu Suoshu substrate, and described first, second hooks Cutter is adjacent and sets, and sets combination with the link mechanism other end group then at described substrate one end correspondence, and sets on the substrate There is a loose slot, the substrate is positioned inside board by the loose slot by component.

2. the thread hooking and cutting device of sewing machine as described in claim 1, wherein the link mechanism includes:

One first double-action plate is equipped with pivot in central part and determines portion, and the pivot is determined portion and is positioned on board for pivot group, and described first Double-action plate one end is corresponding to be linked with double dynamical group of the drive portion；

One first connecting rod is located at first direction, and one end is corresponding to be linked with the first double-action plate other end；

One second double-action plate is equipped with articulated section in central part, and the articulated section is positioned on board for pivot group, and described second connects Connection that movable plate one end corresponds to and the first connecting rod other end is pivoted；

One second connecting rod is located at second direction, and one end is corresponding to be linked with the second double-action plate other end, and described second connects The bar other end is corresponding to be linked with the substrate for hooking cut unit.

3. the thread hooking and cutting device of sewing machine as claimed in claim 1 or 2, wherein it is fixed to be further equipped with one in board Piece, the fixinig plate are equipped with an elongated slot, the drive portion of the pressing plate are allowed to pass through the elongated slot and the link mechanism pivot group.